JP4199842B2 - Turret device and connection device with on-off valve suitable for it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turret device and a connection device with an on-off valve suitable for the turret device, and more particularly to supply of cutting fluid.
[0002]
[Prior art]
The turret device includes a device that holds a plurality of cutting tools, processes a workpiece with one of the plurality of cutting tools, and at least one of the cutting tools is a rotary cutting tool. A plurality of cutting tools are selectively positioned at the working position to process the workpiece, but a rotational drive device is provided at the working position, and the rotary cutting tool positioned at the working position is rotationally driven. The workpiece is processed by being rotated by the apparatus. A cutting fluid supply device is also provided at the working position, and the cutting fluid is supplied from the outside of the cutting tool toward the cutting edge regardless of whether the cutting tool is a rotary cutting tool or a non-rotating cutting tool. Cooling, chip discharge, lubrication, etc. are performed.
[0003]
However, when the cutting tool is a hole drilling tool that performs holes such as drilling, boring, and reamer processing, and when cutting fluid is supplied from the outside of the tool, the cutting fluid is between the hole and the drilling tool. Although it enters between the two through the gap, the cutting fluid is difficult to enter and the supply amount tends to be insufficient. The cutting fluid discharges the chips while flowing through the groove formed in the drilling tool. For example, when the drilling tool is a thin shaft, the ratio of the tool length to the sectional area of the groove is large. Even if the length of the tool itself is short, it is not easy to discharge chips, and a large amount of cutting fluid is required for discharging. It will cause defects. Also, when the hole drilling tool is for deep hole drilling, the drilling hole is deep, so the cross-sectional area of the drilling hole is large, and even if the cross-sectional area of the groove of the drilling tool is large, the tool length relative to the cross-sectional area of the groove The ratio is large and a large amount of cutting fluid is required to discharge chips, resulting in a shortage of cutting fluid. Furthermore, if the hole drilling tool is for high-speed rotation, the amount of heat generated during machining is large, and a large amount of cutting fluid is required for cooling, which also causes a shortage of cutting fluid.
[0004]
[Problems to be Solved by the Invention, Problem Solving Means, Functions and Effects]
  The present invention has been made against the background of the above circumstances,RotateTo provide a turret device capable of supplying a sufficient amount of cutting fluid even when machining with a hole machining tool, and a connection device with an on-off valve suitable for supplying the cutting fluid.DirectIt was made as an issue.Therefore, the present invention is particularly effective when the cutting tool holding portion includes a tool holding shaft that rotates with a tool holding hole and holds the hole machining tool by the tool holding shaft. It is not limited. The present invention can also be applied to a turret device having a cutting tool holding portion that does not include a rotating tool holding shaft.According to the present invention, a turret device and a connection device with an on-off valve according to the following embodiments are obtained. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is to clarify the possibility of combining the features described in each section.
  Note that some of the following paragraphs are no longer inventions described in the claims or subordinate concepts of the invention due to amendments, but are useful for understanding the invention described in the claims. Therefore, it will be left as it is.
  Also, (1) Term, (2) Terms and (Ten) While combining the terms and adding the features of the atmospheric pressure chamber described in paragraph [0032], (1) "At least one of the plurality of cutting tool holding portions includes a tool holding shaft that is provided with a tool insertion hole into which a cutting tool is inserted and is rotatably held by a tool post, and the second liquid passage is What deleted the requirement that “connected to the tool insertion hole of the tool holding shaft” corresponds to claim 1, (7) In terms (Ten) And the features of the atmospheric pressure chamber described in paragraph [0032] correspond to claim 2 and claim 2 (8) Terms and (11) What added the characteristic of a term is equivalent to Claim 3.
(1) an apparatus main body;
  A tool post which is held by the apparatus main body so as to be rotatable around a rotation axis and movable in a direction parallel to the rotation axis, and having a plurality of cutting tool holding parts;
  A clamping device that moves the tool post close to the apparatus main body and fixes the turret so as not to be relatively rotatable with respect to the apparatus main body, while being spaced apart from the apparatus main body and enabling relative rotation with respect to the apparatus main body
  In a state where the clamping device enables relative rotation of the tool post with respect to the apparatus main body, the tool post is rotated with respect to the apparatus main body, and each of the plurality of cutting tool holding portions is selectively set to a predetermined operation position. A turret rotation device for positioning to
DressFirst liquid passage formed in the mounting bodyAnd bladeA connecting device for connecting the second liquid passage formed in the pedestal;
And at least one of the plurality of cutting tool holding portions includes a tool insertion hole into which the cutting tool is inserted.BladeA turret assembly including a tool holding shaft rotatably held on a pedestal and having the second liquid passage communicated with a tool insertion hole of the tool holding shaft.Place.
  When changing the cutting tool used for processing in the turret device of this aspect, the turret rotation device is in a state in which the tool post is separated from the device main body by the clamp device, the clamp is released, and the relative rotation with respect to the device main body is enabled. Is rotated with respect to the apparatus main body, and one of the plurality of cutting tool holding portions is positioned at a predetermined operating position. After the positioning, the tool post is attracted to the apparatus main body by the clamp device and fixed so as not to be relatively rotatable.
  If the cutting tool holding part positioned at the operating position includes a tool holding shaft, the second liquid passage provided for the cutting tool holding part positioned at the operating position is positioned at the operating position together with the cutting tool holding part. And connected to the first liquid passage by the connecting device. Then, the tool holding shaft is rotated by a rotary drive device provided at the operating position, the workpiece is processed by the rotary cutting tool, and the cutting fluid is supplied from the cutting fluid supply source. For example, if the rotary cutting tool held by the tool holding shaft is a hole machining tool having a liquid passage penetrating in the axial direction, the cutting fluid is a first liquid passage, a connecting device, a second liquid passage, a tool insertion hole. Is then supplied to the liquid passage in the drilling tool, and the cutting fluid is injected from the inside of the drilling tool between the tip of the tool and the bottom of the hole. When supplying cutting fluid through the fluid passage in the drilling tool, there is nothing that prevents the cutting fluid from being supplied, and a large amount of cutting fluid is reliably supplied between the tip of the drilling tool and the bottom of the hole. And a sufficient chip discharge effect and cutting edge cooling effect can be obtained.
  All of the plurality of cutting tool holding units may include a tool holding shaft, or a part thereof may include a tool holding shaft. The second liquid passage is provided at least for each of the cutting tool holding portions including the tool holding shaft. A second liquid passage may also be provided for a cutting tool holding portion that does not include a tool holding shaft provided with a tool holding hole, and the cutting fluid may be supplied through the second liquid passage. By doing so, in the cutting tool holding portion including the tool holding shaft and the cutting tool holding portion not including the cutting tool holding portion, at least the configuration from the cutting fluid supply source to the second liquid passage is commonly used for the supply of the cutting fluid. can do.
(2) The connection device is
  A front end surface that is slidably fitted in the apparatus main body so as to be slidable in the axial direction, and that can contact the periphery of the opening of the second liquid passage formed in the tool rest when the apparatus main body and the tool rest are approached, and a front end thereof A joint member comprising a connection passage opening in the surface;
  A spring member for biasing the joint member in a direction protruding from the apparatus main body;
  In a state where the joint member is at the projecting end position where it protrudes most, the connection passage and the first liquid passage are closed, and the joint member resists the biasing force of the spring member.DressAn on-off valve that is in an open state that allows the connection passage and the first liquid passage to communicate with each other in a state of being pushed into the mounting body side;
  A hydraulic urging device for applying an urging force in a protruding direction to the joint member based on the hydraulic pressure in the first liquid passage;
The turret assembly described in (1)Place.
  In the turret device according to this aspect, in a state where the tool post is separated from the apparatus main body and relative rotation with respect to the apparatus main body is enabled, the joint member moves to the protruding end position, and the on-off valve is connected to the connection passage and the first liquid. Since the passage is blocked, the cutting fluid does not leak from the joint member. Further, the joint member is separated from the tool post and does not hinder the rotation of the tool post. When the tool post is rotated with respect to the apparatus main body and the one having the second liquid passage among the plurality of cutting tool holding portions is positioned at the working position, The periphery of the opening of the formed second liquid passage comes into contact with the joint member, and the second liquid passage and the connection passage are connected. When the tool post is further moved closer to the apparatus main body, the joint member is pushed into the apparatus main body against the biasing force of the spring member, the on-off valve is opened, and the connection passage communicates with the first liquid passage. The first liquid passage and the second liquid passage are communicated with each other through the connection passage. During machining, cutting fluid is supplied through these passages, but since the urging force in the protruding direction is given to the joint member by the hydraulic urging device in addition to the urging force of the spring member, the joint member The front end surface of this is brought into a sufficiently strong contact with the periphery of the opening of the second liquid passage, so that it is possible to prevent the cutting fluid from leaking between them. If the gap between the front end surface of the joint member and the periphery of the opening of the second liquid passage is sealed by the seal member, the leakage of the cutting fluid is reliably prevented. Even if it is not sealed by the sealing member, the leakage of the cutting fluid is negligible.
  The hydraulic pressure of the cutting fluid supplied to the second fluid passage through the connection passage acts in a direction to separate the joint member from the periphery of the opening of the second fluid passage. If this force is greater than the force pressing the distal end surface of the joint member against the periphery of the opening of the second fluid passage, the distal end surface of the joint member is separated from the periphery of the opening of the second fluid passage, and the cutting fluid leaks between the two. If the drilling tool needs to supply cutting fluid to the internal fluid passage at a relatively high pressure, such as a gun drill or guide reamer, the fluid pressure of the cutting fluid is particularly high. And the force of the direction which separates the front end surface of a joint member from the opening periphery of a 2nd liquid channel becomes large.
  On the other hand, if the hydraulic pressure urging device is provided and the urging force in the projecting direction is applied to the joint member, as the hydraulic pressure of the cutting fluid increases, the joint member has a distal end surface near the opening of the second liquid passage. Since the pressing force is also increased and the leakage of the cutting fluid is well prevented, a cutting fluid with a high pressure can be supplied. The higher the hydraulic pressure of the cutting fluid, the greater the force to move the joint member away from the periphery of the opening of the second fluid passage, but the hydraulic biasing device applies a larger biasing force to the joint member. As a result, the joint member can be reliably maintained in a state in which the front end surface is in contact with the periphery of the opening of the second liquid passage.
  The hydraulic urging device uses the hydraulic pressure of the cutting fluid and can easily apply a sufficiently large urging force to the joint member. Further, the hydraulic biasing device applies a biasing force to the joint member based on the hydraulic pressure when supplying the cutting fluid, but does not apply a biasing force to the joint member in a state where the hydraulic pressure does not act. Pushing into the main body can be easily performed. The first fluid passage is connected to the cutting fluid supply source. However, when the joint member is pushed into the apparatus main body and the on-off valve is opened, the cutting fluid is supplied from the cutting fluid supply source to the first fluid passage. If the supply is not started, the urging force of the hydraulic urging device is not applied to the joint member, and the joint member can be pushed into the apparatus main body side only against the urging force of the spring member.
(3) The turret device according to (1) or (2), wherein the second liquid passage communicates with a cutting fluid injection nozzle mounting portion provided in the tool post.
  In the turret device of this aspect, the cutting fluid spray nozzle can be attached to the cutting fluid spray nozzle mounting portion, and the cutting fluid can be supplied from the outside of the cutting tool. Of course, when the cutting tool is not a rotary cutting tool, the cutting tool holding part provided corresponding to the second liquid passage includes a tool holding shaft, and even when the rotary cutting tool is held, cutting is performed from the outside of the rotary cutting tool. The liquid can be supplied. In that case, the rotary cutting tool has a liquid passage inside, and even if the cutting fluid can be supplied from the inside of the rotary cutting tool, the rotary cutting tool does not have a liquid passage inside and the cutting fluid from the inside is not supplied. It may be impossible to supply.
(4) The turret device with a connection device according to (3), further including a closing unit that selectively closes the cutting fluid injection nozzle mounting portion and the tool insertion hole.
  When the cutting fluid injection nozzle is attached to the cutting fluid injection nozzle mounting portion so as to supply the cutting fluid from the outside of the cutting tool, the tool insertion hole is blocked and the cutting fluid is prevented from flowing out of the tool insertion hole. . When supplying the cutting fluid from the inside of the rotary cutting tool, the cutting fluid injection nozzle mounting portion is closed, and the cutting fluid is supplied from the tool insertion hole through the inside of the rotary cutting tool.
  As described in the embodiment of the invention, the tool insertion hole is an insertion limit defining member that defines the insertion limit of the rotary cutting tool into the tool insertion hole, and the insertion limit specification with an adjusting function capable of adjusting the insertion limit. It may be closed by a member, or may be closed by a member different from the insertion limit defining member. In the former case, the number of parts can be reduced, and the configuration of the cutting tool holding unit can be simplified.
(5) Further, the cutting fluid injection nozzle and a tool insertion hole of the tool holding shaft can be selectively connected to the second fluid passage according to any one of (1) to (3). Turret device.
  When supplying cutting fluid from the outside of the cutting tool, a cutting fluid injection nozzle is connected to the second fluid passage. When supplying cutting fluid from the inside of the rotary cutting tool, a tool insertion hole is provided in the second fluid passage. Is connected.
(6) In addition, any one of (1) to (5) includes a communication state holding device that maintains a communication state between the second liquid passage and the tool insertion hole while allowing rotation of the tool holding shaft. The turret device described in 1.
  At the time of machining, the phase between the tool holding shaft and the second liquid passage changes due to rotation, but the communication state holding device keeps the cutting fluid supplied.
(7) A connecting device for connecting the first liquid passage formed in the first member to the second liquid passage formed in the second member,
  A front end face that is slidably fitted to the first member in the axial direction and that can contact the periphery of the opening of the second liquid passage of the second member when the first member and the second member approach each other; A joint member provided with a connection passage that opens to the tip surface;
  A spring member for biasing the joint member in a direction protruding from the first member;
  In the state where the joint member is at the most projecting end position, the connection passage and the first liquid passage are closed, and the joint member moves toward the first member against the biasing force of the spring member. An on-off valve that is in an open state that allows the connection passage and the first liquid passage to communicate with each other in the pushed state;
  A hydraulic urging device for applying an urging force in a protruding direction to the joint member based on the hydraulic pressure in the first liquid passage;
Connection device with on-off valve includingPlace.
  Regarding the connection device of this aspect, the description applies to the connection device of the turret device described in section (2) as long as the device main body is read as the first member and the tool post is read as the second member. The first member and the second member are not limited to the apparatus main body and the tool post of the turret device, but may be members that have a first liquid passage and a second liquid passage, respectively, and can be approached and separated from each other.
(8) The connection device with on-off valve according to item (7), wherein the on-off valve is a spool valve.
(9) The connection device with an on-off valve according to (7), wherein the on-off valve is a seat valve.
(10) The hydraulic pressure biasing device is
  A housing;
  A piston slidably fitted in the housing;
  A fluid pressure introduction passage for guiding the fluid pressure of the first fluid passage into the housing and acting on a pressure receiving surface of the piston opposite to the tip surface;
The connection device with an on-off valve according to any one of (7) to (9).
(11) The connection device with on-off valve according to (10), wherein the piston and the joint member are integrally formed.
  The diameter of the piston can be made larger than the diameter of the joint member, and the biasing force applied to the joint member by the hydraulic biasing device can be increased.
(12) The on / off valve connecting device according to item (10), wherein the joint member itself functions as the piston.
  Even if the joint member itself functions as a piston and the diameter of the joint member is the diameter of the piston, it is possible to apply a biasing force in the protruding direction to the joint member.
(13) an apparatus body;
  A tool post which is held by the apparatus main body so as to be rotatable around a rotation axis and movable in a direction parallel to the rotation axis, and having a plurality of cutting tool holding parts;
  A clamping device that moves the tool post close to the apparatus main body and fixes the turret so as not to be relatively rotatable with respect to the apparatus main body, while being spaced apart from the apparatus main body and enabling relative rotation with respect to the apparatus main body
  In a state where the clamping device enables relative rotation of the tool post with respect to the apparatus main body, the tool post is rotated with respect to the apparatus main body, and each of the plurality of cutting tool holding portions is selectively set to a predetermined operation position. A turret rotation device for positioning to
DressFirst liquid passage formed in the mounting bodyAnd bladeA connection device for connecting the second liquid passage formed in the pedestal, and
  The connecting device is
DressThe device body is slidably fitted to the device body in the axial direction.And bladeA joint member provided with a tip surface that can be brought into contact with the periphery of the opening of the second liquid passage formed on the tool post at the time of approaching the work base, and a connection passage that opens to the tip surface;
  A spring member for biasing the joint member in a direction protruding from the apparatus main body;
  In a state where the joint member is at the projecting end position where it protrudes most, the connection passage and the first liquid passage are closed, and the joint member resists the biasing force of the spring member.DressAn on-off valve that is in an open state that allows the connection passage and the first liquid passage to communicate with each other in a state of being pushed into the mounting body side;
  A hydraulic urging device for applying an urging force in a protruding direction to the joint member based on the hydraulic pressure in the first liquid passage;
Including turret device.
  In the turret device of this aspect, the cutting tools held by the cutting tool holding unit may be all rotary cutting tools, all non-rotating cutting tools, some rotary cutting tools, and the rest non-rotating tools. A rotary cutting tool may be used. The cutting fluid is supplied to the cutting tool through the second fluid passage for at least some of the cutting tool holding portions. In any case, as in the connection device described in the item (2), even when a high-pressure cutting fluid is supplied, the joint member is kept pressed sufficiently strongly around the opening of the second fluid passage. , Cutting fluid leakage is prevented well.
  In the turret device of this embodiment, the characteristics of the turret device described in each of the items (1) and (3) to (6) and the connection device described in each of the items (8) to (12) can be adopted.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a spindle stock, and a spindle 12 is rotatably provided on the spindle stock 10. The main shaft 12 is provided with a chuck 14 for gripping and releasing the workpiece 16. The rotation angle of the main shaft 12 can be controlled, and the workpiece 16 can be rotated in an arbitrary direction by an arbitrary angle. A turret device 20 is provided adjacent to the headstock 10, and the headstock 10 and the turret device 20 constitute a turret lathe. The turret device 20 has a moving table 22 that moves in a direction parallel to the rotation axis of the main shaft 12 (hereinafter referred to as the main shaft rotation axis) and in a direction perpendicular to the main shaft rotation axis in the horizontal plane. On 22, a turret housing 24 is provided with a fixed position.
[0006]
The turret housing 24 allows the tool rest 26 to rotate around an axis orthogonal to the main shaft rotation axis in a horizontal plane and to its own rotation axis 28 (indicated by a one-dot chain line in FIG. 1, hereinafter referred to as a tool rest rotation axis 28). It is held so as to be movable in a direction parallel to. The tool post 26 has a circular cross-sectional shape, and ten cutting tool holders 30 are provided at equal angular intervals on one circumference centered on the tool post rotation axis 28 (see FIG. A single cutting tool holder 30 is typically shown).
[0007]
The tool post 26 is fixed to the turret housing 24 by a clamping device (not shown). The clamp device is an elastic member that is a kind of urging means, and urges the tool post 26 toward the turret housing 24 and engages with a spring member that is a drawing member that attracts the turret housing 24 and a kind of positioning means. A clamp release mechanism for releasing the clamp of the tool post 26 by the clutch and the spring member is provided. The tool post 26 is brought close to the turret housing 24 by pulling in the spring member, and is positioned by a meshing clutch and fixed to the turret housing 24 so as not to rotate relative to the turret housing 24. Against the turret housing 24, allowing relative rotation with respect to the turret housing 24. The turret 26 is rotated with respect to the turret housing 24 by a turret rotating device (not shown) in a state where the clamping device enables relative rotation of the turret 26 with respect to the turret housing 24, and holds the plurality of cutting tools. Each of the parts 30 is selectively positioned at a predetermined operating position. The action position is a position where the cutting tool holding unit 30 is located closest to the headstock 10 in the direction parallel to the spindle rotation axis. These clamping device and turret rotation device are well known devices, and illustration and detailed description thereof are omitted.
[0008]
One of the cutting tool holders 30 will be described with reference to FIG. The tool post 26 is formed with a through hole 40 penetrating in a direction parallel to the tool post rotation axis 28, and a shaft holder 42 is fitted and fixed in the through hole 40. The shaft holder 42 is formed by assembling a plurality of members for the convenience of manufacture, and functions as an integral member after assembly. The shaft holder 42 has a generally cylindrical shape, and supports a tool holding shaft 46 through a plurality of bearings 44 so as to be rotatable about an axis parallel to the tool post rotation axis 28. The cutting tool holder 30 is provided with a tool holding shaft 46 so as to be rotatable around an axis perpendicular to the main axis rotation axis in a horizontal plane.
[0009]
A driven member 48 is concentrically fixed to an end portion of the tool holding shaft 46 on the turret housing 24 side by a bolt (not shown) which is a kind of fixing means, and between the tool holding shaft 46 and the driven member 48. A key 49 is provided so that rotational torque is transmitted from the driven member 48 to the tool holding shaft 46. The tool holding shaft 46 is rotated by a rotation drive device 50 (see FIG. 1). The rotation drive device 50 is provided at a position corresponding to the operating position of the turret housing 24, and a drive shaft (not shown) is connected to the tool post rotation axis 28 in a drive shaft housing 52 provided integrally with the turret housing 24. It is provided at a position that is concentric with the tool holding shaft 46 of the cutting tool holding portion 30 that is rotatable around a parallel axis and is positioned at the operating position. The rotational drive device 50 is provided on the movable table 22. A driven member 48 fixed to the tool holding shaft 46 of the cutting tool holding unit 30 positioned at the working position and a drive member (not shown) provided on the drive shaft of the rotary drive device 50 are connected by a coupling device (not shown). The rotation drive device 50 rotates the driven member 48 while rotating the tool holding shaft 46.
[0010]
Inside the tool holding shaft 46 is formed a bottomed tool insertion hole 54 that opens to the end surface opposite to the side to which the driven member 48 is fixed, and a collet chuck 56 is provided in the opening. And holds a drill 58 (see FIG. 2) with a liquid passage, which is a kind of drilling tool. The drill 58 with a liquid passage is a drill in which a liquid passage 60 penetrating on the axis is formed.
[0011]
A part of the tool insertion hole 54 is a female screw hole 68 as shown in FIG. 2, and a cutting fluid supply adjusting screw 70 is screwed into the tool insertion hole 54. The cutting fluid supply adjusting screw 70 is formed with a fluid passage 72 penetrating the center and an engagement hole 74 having a hexagonal cross section as a tool engaging portion. An O-ring 76 is fitted to the end on the side where the engagement hole 74 is formed. Note that the female screw hole 68 and the cutting fluid supply adjusting screw 70 are finely and accurately formed, and liquid leakage from between the cutting fluid supply adjusting screw 70 and the female screw hole 68 is negligible. Not really.
[0012]
When the drill 58 with a fluid passage is attached to the tool holding shaft 46, the collet chuck 56 is in an unclamped state, and the drill 58 with a fluid passage is inserted into the tool insertion hole 54 until it abuts against the cutting fluid supply adjusting screw 70. The After the insertion, the collet chuck 56 is clamped and the drill 58 with a liquid passage is gripped. The rear end surface of the drill 58 with a liquid passage is flat, contacts the O-ring 76, the liquid passage 60 and the liquid passage 72 are connected, and the liquid tightness is maintained by the O-ring 76. The rotation of the tool holding shaft 46 is transmitted from the collet chuck 56 to the drill 58 with a liquid passage. By adjusting the screwing amount of the cutting fluid supply adjusting screw 70 into the female screw hole 68, the insertion depth of the drill 58 with liquid passage into the tool insertion hole 54 is adjusted, and the position of the cutting edge of the drill 58 with liquid passage is adjusted. The
[0013]
In the tool post 26, a second liquid passage 80 is formed adjacent to the cutting tool holding unit 30 and on the outer peripheral side of the cutting tool holding unit 30. Each of the second liquid passage 80 and the through hole 40 is provided for each of the ten cutting tool holding portions 30. The ten through-holes 40 and the second liquid passages 80 are provided in the tool rest 26 at equal angular intervals on a circle around the tool rest rotation axis 28.
[0014]
The second liquid passage 80 is opened to the end surface of the tool post 26 on the turret housing 24 side and the through hole 40. The tool post 26 is provided with a female screw hole 82 in which a pipe taper female screw is formed. The female screw hole 82 is opened at the end surface of the tool post 26 opposite to the turret housing 24, and the second liquid passage 80 is communicated with the female screw hole 82. A portion of the tool post 26 in which the female screw hole 82 is formed is a cutting fluid injection nozzle mounting portion 84, and a plug 86 in which a taper male screw for pipe is formed is screwed into the female screw hole 82, and the cutting fluid injection nozzle mounting portion 84 is formed. Blocked without leakage of cutting fluid.
[0015]
The second liquid passage 80 includes a liquid passage 90 formed through the peripheral wall of the shaft holder 42 in the radial direction, and an annular liquid chamber 92 formed between the shaft holder 42 and the tool holding shaft 46. A plurality of radial passages 98 formed in a sleeve 96 provided between inner races 94 of two bearings 44 separated from each other and rotated integrally with the tool holding shaft 46; The tool insertion hole 54 is communicated with a plurality of radial passages 100 that communicate the portion between the bottom surface of the tool insertion hole 54 and the female screw hole 68 and the radial passage 98.
[0016]
A pair of seal members 104 are provided in the liquid chamber 92 to prevent cutting fluid from leaking. These seal members 104 are commercially available seal members sold as BALI lip (trade name) by US company Busark & Chambang, and as shown in FIG. 8, a metal case 105, a double seal lip 107, and an elastomer gasket 108 are used. including. The seal of the sleeve 96 that rotates integrally with the tool holding shaft 46 is performed by pressing the seal lip 107 against the sleeve 96 in the radial direction by the hydraulic pressure of the cutting fluid. 105 is pressed into the shaft holder 42, and the seal between the metal case 105 and the seal lip 107 is secured by an elastomer gasket 108. The elastomer gasket 108 is made of NBR (nitrile butadiene rubber) and is sandwiched between metal cases 105. The seal lip 107 is made of turcon (trade name, thermoplastics), and the seal member 104 is 2.45 × 10.⁶ Pa (25kgf / cm² ) Can withstand the hydraulic pressure. The liquid passage 90, the liquid chamber 92, the radial passages 98 and 100, and the seal member 104 constitute a communication state holding device 106.
[0017]
In another one of the ten cutting tool holders 30, as shown in FIG. 3, the tool holding shaft 46 is connected to the tool post rotation axis 28, as in the cutting tool holder 30 shown in FIG. While being provided so as to be rotatable around parallel axes, it does not have a liquid passage inside, and holds a liquid passage-less drill 110 which is a kind of drilling tool. Therefore, the closing adjustment screw 112 is screwed into the female screw hole 68. The closing adjustment screw 112 is a solid member, and is provided with an engagement hole 114 having a hexagonal cross section serving as a tool engagement portion at one end. The closing adjustment screw 112 is as fine and precise as the cutting fluid supply adjusting screw 70, and liquid leakage between the closing adjustment screw 112 and the female screw hole 68 is negligible. Therefore, the cutting fluid does not leak from the tool insertion hole 54. The plug 86 and the closing adjustment screw 112 constitute closing means. A pipe joint 118 of the cutting fluid injection nozzle 116 is screwed into the female screw hole 82 communicating with the second fluid passage 80, and the cutting fluid injection nozzle 116 is attached to the cutting fluid injection nozzle mounting portion 84.
[0018]
Another embodiment of the cutting tool holding unit 30 will be described with reference to FIG. The cutting tool holding unit 30 is provided with a tool holding shaft 120 that is rotatable about an axis perpendicular to the tool post rotation axis 28 in a horizontal plane. The tool holding shaft 120 is parallel to the spindle rotation axis in a state where the cutting tool holding portion 30 including the tool holding shaft 120 is positioned at the operating position. The shaft holder 122 provided in the cutting tool holding unit 30 is formed by integrally assembling a plurality of members for the convenience of assembly, and functions as an integral member after assembly. The shaft holder 122 is provided with a fitting portion 124 fitted into the through hole 40, and a projecting end of the fitting portion 124 from the through hole 40 to the opposite side of the turret housing 24. And a holding portion 126 for holding.
[0019]
A through hole 128 is formed in the holding portion 126 at right angles to the tool post rotation axis 28 and penetrates the holding portion 126. In the fitting portion 124, the through hole 128 is orthogonal to the fitting portion 124. A fitting hole 130 is formed in the end surface on the turret housing 24 side. A tool holding shaft 120 is held in the through hole 128 via a plurality of bearings 134 so as to be rotatable about an axis perpendicular to the tool post rotation axis 28.
[0020]
A bevel gear 138 is fixed to the tool holding shaft 120 and meshed with another bevel gear 140. A rotary shaft 144 is held in the fitting hole 130 via a bearing 142 so as to be rotatable around an axis parallel to the tool post rotation axis 28, and a bevel gear 140 is provided at an end of the tool holding shaft 120. Is fixed and meshed with the bevel gear 138.
[0021]
A driven member 146 is concentrically fixed to the end of the rotating shaft 144 opposite to the side on which the bevel gear 140 is fixed by a bolt which is a kind of fixing means (not shown). A key 148 is provided between the driving member 146 and a rotational torque transmitted from the driven member 146 to the rotating shaft 144. When the cutting tool holding unit 30 is positioned at the operating position, the driven member 146 is concentric with the drive shaft of the rotary drive device 50, and the drive member provided on the drive shaft and the driven member 146 are connected by a coupling device (not shown). The driven member 146 is rotated by the rotation driving device 50 and the rotating shaft 144 is rotated. This rotation is transmitted to the tool holding shaft 120 via the bevel gears 138 and 140, and the tool holding shaft 120 is rotated around an axis parallel to the main shaft rotation axis.
[0022]
In the tool holding shaft 120, a bottomed tool insertion hole 150 is formed that opens to an end surface far from the tool post rotation axis 28. A part of the tool insertion hole 150 is a female screw hole 152, and an adjustment screw 154 for cutting fluid supply is screwed into the tool insertion hole 150. Like the cutting fluid supply adjusting screw 70, the cutting fluid supply adjusting screw 154 is provided with a fluid passage 156 passing through the center in the axial direction and an engagement hole 158 for engaging the tool, and an O-ring. 160 is fitted. Further, a collet chuck 162 is provided at the opening of the tool insertion hole 150, and a drill 58 with a liquid passage is held.
[0023]
In the tool holding shaft 120, a liquid passage 168 that opens to the end surface opposite to the side where the tool insertion hole 150 opens and communicates with the tool insertion hole 150 is formed. The opening of the liquid passage 168 is covered with a cover 170 fixed to the holding portion 126 of the shaft holder 122, and a liquid chamber 172 covering the opening of the liquid passage 168 is provided between the cover 170 and the tool holding shaft 120. Is provided. The cover 170 is also provided with a female screw hole 174 in which a pipe taper female screw is formed. The liquid chamber 172 is connected to the second liquid passage 80 by a connection hose 176. The pipe joints 178 and 179 respectively attached to both ends of the connection hose 176 are screwed into the female screw holes 174 and 82, and the liquid chamber 172 and the second liquid passage 80 are connected.
[0024]
A seal member 180 is provided between the tool holding shaft 120 and the holding portion 126 of the shaft holding body 122, and an O-ring 181 is provided between the cover 170 and the shaft holding body 122 so as to leak cutting fluid. Is prevented. The sealing member 180 uses a varislip made by the above-mentioned BUSHERK & CHAMBAN, and is configured in the same manner as the sealing member 104. 2.45 × 10⁶ Pa (25kgf / cm² ) Can withstand the hydraulic pressure. The cover 170, the liquid chamber 172, the seal member 180, and the O-ring 181 constitute a communication state holding device 182.
[0025]
As shown in FIG. 5, another one of the ten cutting tool holders 30 rotates around an axis perpendicular to the tool post rotation axis 28 as in the cutting tool holder 30 shown in FIG. 4. A liquid passage-less drill 110 that includes a possible tool holding shaft 120 and does not have a liquid passage therein is held. In the cutting tool holding unit 30, a plug 184 having a pipe taper male screw is screwed into the female screw hole 174 of the cover 170 to close the liquid chamber 172, and consequently the tool insertion hole 150, and to the female screw hole 82. The cutting fluid injection nozzle 186 is attached by a pipe joint 188 without leakage of the cutting fluid.
[0026]
The other six cutting tool holding portions 30 are configured in the same manner as any of the cutting tool holding portions 30 shown in FIGS. 2 to 5, and hold the drill 58 with a liquid passage or the drill 110 without a liquid passage, Cutting fluid is supplied through the second fluid passage 80.
[0027]
As shown in FIG. 1, a connecting device 190 with an on-off valve is provided at a position corresponding to the operating position of the turret housing 24. The connection device 190 with the on-off valve is provided on the moving table 22. As shown in FIG. 6, the connection housing 192 of the connection device 190 with the on-off valve includes a connection housing body 194. A through-hole 196 is formed in the connection housing body 194 so as to penetrate in the direction parallel to the tool post rotation axis 28. The through hole 196 has a stepped shape, and the opening of the large-diameter hole portion 198 is closed by fitting the plug 200, and the plug 200 and the connection housing main body 194 constitute the connection housing 192. The connection housing 192 of the connection device 190 with the opening / closing valve 190, the drive shaft housing 52 of the rotary drive device 50, and the turret housing 24 are integrally provided to constitute a device main body 202 which is a turret main body of the turret device 20. . The clamping device and the turret rotation device (not shown) are provided in the device main body 202.
[0028]
A joint member 206 is fitted in the small diameter hole portion 204 of the through hole 196 so as to be slidable in the axial direction. The joint member 206 includes a hard rubber seal ring 208, and an end surface of the seal ring 208 constitutes a distal end surface 210 of the joint member 206. In the joint member 206, a connection passage 212 that opens to the distal end surface 210 and extends in the axial direction is formed.
[0029]
In the joint member 206, a liquid passage 214 that extends in the diametrical direction of the joint member 206 and an annular passage 216 that opens to the outer peripheral surface of the joint member 206 and communicates with the liquid passage 214 are formed. ing. Both sides of the portion of the joint member 206 where the annular passage 216 is provided are sealed by a pair of seal members 218 to maintain liquid tightness, and the liquid passage 214 and the annular passage 216 of the joint member 206 are formed. The formed portion constitutes a spool, and the opening / closing valve 220 is constituted together with the portion into which the portion constituting the spool of the joint member 206 of the connection housing body 194 is fitted. The on-off valve 220 is a spool valve.
[0030]
The connection housing body 194 is also formed with a liquid passage 224 that opens to the small-diameter hole portion 204 and the outside, and a female screw hole 226 is formed in the opening portion of the liquid passage 224 to the outside. A taper female screw for pipe is formed in the female screw hole 226, and a pipe joint of a connection hose (not shown) is screwed without leakage of the cutting fluid, and the fluid passage 224 is connected to a cutting fluid supply source (not shown). The cutting fluid supply source includes a pump and a relief valve, and the cutting fluid is supplied by the operation of the pump. The connection housing main body 194 constitutes the apparatus main body 202, and the liquid passage 224 constitutes the first liquid passage.
[0031]
The joint member 206 is integrally provided with a piston 228. The piston 228 has a larger diameter than the joint member 206, and is fitted into the large-diameter hole portion 198 of the through hole 196 by a seal member 230 so as to be liquid-tight and slidable. Thereby, an atmospheric pressure chamber 232 is formed on the joint member 206 side of the piston 228, and a hydraulic pressure chamber 234 is formed on the opposite side of the joint member 206. The atmospheric pressure chamber 232 is released to the atmosphere by a passage 236 formed in the connection housing body 194.
[0032]
A spring member 240 as an elastic member, which is a kind of biasing means, is accommodated in the hydraulic chamber 234 and biases the joint member 206 in a direction protruding from the connection housing 192 via the piston 228. . Therefore, the on-off valve 220 is configured such that the annular passage 216 is disengaged from the liquid passage 224 when the joint member 206 is in the projecting end position that protrudes most from the connection housing 192 as shown in FIG. In the closed state in which the connection passage 212 and the liquid passage 224 constituting the first liquid passage are shut off, and the joint member 206 is pushed into the connection housing 192 against the urging force of the spring member 240, The annular passage 216 coincides with the liquid passage 224, and the connection passage 212 and the liquid passage 224 constituting the first liquid passage communicate with each other. The protruding end position of the joint member 206 is defined by the piston 228 coming into contact with the shoulder surface 244 of the large diameter hole 198.
[0033]
The fluid pressure chamber 234 is connected to the fluid passage 224 constituting the first fluid passage by a fluid pressure introduction passage 250 formed in the connection housing body 194, and the fluid pressure in the fluid passage 224 is a joint member of the piston 228. It is made to act on the pressure receiving surface 254 of 206 opposite to the front end surface 210. A housing constituted by a portion in which the piston 228 of the connection housing 192 is fitted, the piston 228, and the fluid pressure introduction passage 250 constitute a fluid pressure urging device 256.
[0034]
Next, the operation will be described.
First, the case where the workpiece 16 is processed by the drill 58 with a liquid passage shown in FIG. 2 will be described. If the cutting tool holding portion 30 that holds the drill 58 with a liquid passage used for processing is not in the operating position, the turret housing 26 resists the biasing force of the spring member by the clamp release mechanism of the clamp device. The clamp is released and is allowed to rotate relative to the turret housing 24. In this state, the tool post 26 is rotated with respect to the turret housing 24 by the turret rotating device, and the cutting tool holding unit 30 holding the drill 58 with a liquid passage is positioned at the operating position.
[0035]
In a state where the tool post 26 is attracted to the turret housing 24 and clamped, the joint member 206 is pushed into the connection housing 192 as shown in FIG. 7, and the distal end surface 210 is placed around the opening of the second liquid passage 80. It is in contact. Further, the pump of the cutting fluid supply source is stopped when the cutting tool holding unit 30 is positioned at the operating position. As the tool post 26 is moved away from the turret housing 24, the joint member 206 moves to the protruding end position as shown in FIG. At this time, the pump is stopped, but the cutting fluid is sucked into the hydraulic chamber 234 from a tank (not shown) through the pump, and the joint member 206 moves to the protruding end position. In a state where the tool post 26 is separated from the turret housing 24 and can be rotated relative to the turret housing 24, the joint member 206 moves to the protruding end position by the bias of the spring member 240, and the on-off valve 220 is connected to the connection passage. Since the 212 and the fluid passage 224 are blocked, the cutting fluid does not leak from the joint member 206. Further, the joint member 206 is separated from the tool rest 26 and does not hinder the rotation of the tool rest 26. After the cutting tool holder 30 is positioned, the tool post 26 is attracted to the turret housing 24 by the spring member of the clamping device, and is positioned by the meshing clutch, and is fixed to the turret housing 24 so as not to be relatively rotatable.
[0036]
As the turret 26 approaches the turret housing 24, the turret 26 approaches the connection device 190 with the on-off valve. In the state where the tool post 26 is separated from the turret housing 24, the tool post 26 is separated from the joint member 206, and the joint member 206 is in the protruding end position and the on-off valve 220 is closed. As the turret housing 24 approaches the turret housing 24, as shown in FIG. 7, the tip surface 210 of the joint member 206 comes into contact with the periphery of the opening of the second liquid passage 80 of the tool post 26, and the connection passage 212 and the second liquid passage 80 is connected. When the tool post 26 is further moved closer to the turret housing 24, the joint member 206 is pushed into the connection housing 192 against the biasing force of the spring member 240, the annular passage 216 coincides with the liquid passage 224, and the on-off valve 220 is opened, the connection passage 212 is connected to the liquid passage 224, and the second liquid passage 80 is connected to the liquid passage 224 via the connection passage 212. When the joint member 206 is pushed into the connection housing 192, the cutting fluid in the hydraulic chamber 234 is returned from the relief valve to the tank.
[0037]
After the positioning of the cutting tool holding unit 30 to the operating position, or in parallel with the positioning, the movable table 22 is moved, and the drill 58 with a liquid passage of the cutting tool holding unit 30 positioned at the operating position is used as a workpiece. 16 is moved to a machining start position where machining is started. Thereafter, the tool holding shaft 46 is rotated by the rotary drive device 50 and is moved relative to the workpiece 16 by the moving table 22, and the spindle rotation axis line is moved to the workpiece 16 in the horizontal plane by the drill 58 with a liquid passage. Processing is performed from the direction perpendicular to the angle. It should be noted that the workpiece 16 is not rotated at the time of machining and remains stopped. The workpiece 16 is rotated by the main shaft 10 during non-machining, and the workpiece is indexed. The turret device holds a non-rotating cutting tool for processing a workpiece without rotating, such as a bite, in addition to the drill 58 with a fluid passage and the drill without a fluid passage 110. If machining is performed, the workpiece is rotated by the main shaft when the workpiece is machined by the non-rotating cutting tool.
[0038]
At the time of processing, the pump is operated, and the cutting fluid is supplied from the cutting fluid supply source. The on-off valve 220 is open, and the cutting fluid is supplied to the tool insertion hole 54 via the fluid passage 224, the connection passage 212, the second fluid passage 80, the fluid passage 90, the fluid chamber 92, and the radial passages 98 and 100. Further, it is ejected between the drill 58 with a fluid passage and the bottom surface of the machining hole through the fluid passage 72 in the cutting fluid supply adjusting screw 70 and the fluid passage 60 in the drill 58 with a fluid passage.
[0039]
The pressure of the supplied cutting fluid is 2.45 × 10⁶ Pa (25kgf / cm² A sufficient amount of cutting fluid is supplied. The cutting fluid cools the cutting edge and flows out of the machining hole through a groove (not shown) formed in the outer peripheral portion of the drill 58 with a liquid passage while discharging the chips. The pressure of the cutting fluid is high, and the seal member 104 provided in the fluid chamber 92 is pressed against the sleeve 96 that rotates together with the tool holding shaft 46 due to the fluid pressure, and slips between the sleeve 96 but is sufficiently resistant. be able to.
[0040]
Further, the urging force based on the urging force of the spring member 240 and the hydraulic pressure acting on the pressure receiving surface 254 of the piston 228 acts on the joint member 206 in the protruding direction in which the connecting member 192 protrudes. The hydraulic pressure also acts in the direction in which the distal end surface 210 separates the joint member 206 from the periphery of the opening of the second liquid passage 80, but the distal end surface 210 is located on the second liquid passage more than the area of the pressure receiving surface on which the hydraulic pressure acts. The area of the pressure receiving surface that receives the hydraulic pressure in the direction of pressing around the opening of the 80 is larger, and the distal end surface 210 of the joint member 206 is pressed with sufficient strength around the opening of the second liquid passage 80 and the distal end surface 210. Is constituted by the end face of the seal ring 208, so that even if the hydraulic pressure of the cutting fluid is high, the distal end surface 210 is separated from the periphery of the opening of the second fluid passage 80, and the cutting fluid does not leak.
[0041]
The tool holding shaft 46 is rotated with respect to the tool post 26, and the phase changes. However, the tool insertion hole 54 and the second liquid passage 80 are held in communication with each other by the communication state holding device 106, and the cutting fluid is liquid. It is supplied to the drill 58 with passage.
[0042]
When the machining is completed, the pump is stopped, the supply of the cutting fluid is stopped, the moving table 22 is moved, and the drill 58 with a fluid passage is detached from the workpiece 16. Next, if processing is performed with another cutting tool (for example, another drill 58 with a liquid passage), the cutting tool holding unit 30 is positioned to the action positioning.
[0043]
When the workpiece 16 is processed by the drill without liquid passage 110, the cutting tool holding unit 30 holding the drill without liquid passage 110 is positioned at the operating position. As the tool post 26 approaches the turret housing 24, the joint member 206 is brought into contact with the periphery of the opening of the second liquid passage 80, and the on-off valve 220 is opened.
[0044]
At the time of machining, the driven member 48 and the tool holding shaft 46 are rotated to rotate the non-fluid drill 110, and the cutting fluid is supplied from the cutting fluid supply source. The cutting fluid is supplied from the outside of the drill 110 without a fluid passage by the cutting fluid injection nozzle 116. In the cutting tool holding unit 30 that holds the drill without liquid passage 110, the closing adjustment screw 112 is screwed into the tool insertion hole 54, and the closing adjustment screw 112 is a solid member that does not have a through hole. The closing adjustment screw 112 is screwed into the female screw hole 68 with high accuracy. Since the liquid leakage between them is negligible and is substantially absent, the cutting fluid does not leak from the tool insertion hole 54.
[0045]
When the workpiece 16 is processed in a direction parallel to the spindle rotation axis by the drill 58 with a liquid passage shown in FIG. 4, the cutting tool holding portion 30 that holds the drill 58 with a liquid passage is in the working position. As the tool post 26 approaches the turret housing 24, the tip surface 210 of the joint member 206 is brought into contact with the periphery of the opening of the second liquid passage 80, and the on-off valve 220 is opened. At the time of machining, the driven member 146 is rotated, and the rotation is transmitted to the tool holding shaft 120 via the rotating shaft 144 and the bevel gears 138 and 140, and the drill 58 with a liquid passage is rotated and the movable table 22 is rotated. Is moved with respect to the workpiece 16 to perform processing. The cutting fluid passes through the second fluid passage 80, the connection hose 176, the fluid chamber 172, the fluid passage 168, the fluid passage 156 formed in the cutting fluid supply adjusting screw 154, and the fluid passage 60 in the drill 58 with fluid passage. The liquid passage drill 58 is ejected between the drill hole 58 and the bottom surface of the machining hole. The hydraulic pressure of the cutting fluid is high, and the seal member 180 is pressed against the tool holding shaft 120 and slips between the tool holding shaft 120, but can sufficiently withstand. Further, the tool holding shaft 120 rotates with respect to the tool rest 26, but the second liquid passage 80 and the tool insertion hole 150 are kept in communication with each other by the communication state holding device 182, and cutting fluid is supplied to the drill 58 with liquid passage. Supplied.
[0046]
When the workpiece 16 is processed by the drill without liquid passage 110 shown in FIG. 5, the cutting tool holding unit 30 holding the drill without liquid passage 110 is positioned at the operating position. The cutting fluid supplied from the cutting fluid supply source at the time of machining is supplied from the outside of the drill without fluid passage 110 by the cutting fluid injection nozzle 186 connected to the second fluid passage 80. At this time, the plug 184 is screwed into the female screw hole 174 of the cover 170 so that dust or the like does not enter the liquid chamber 170 or the liquid passage 168. In the cutting tool holding unit 30 in which the tool holding shaft 120 is rotated about an axis parallel to the spindle rotation axis and the drills 58 and 110 process the workpiece 16, the second liquid passage 80 is provided on the tool rest 26. Since it is not connected to the tool insertion hole 150 inside and is connected to the tool insertion hole 150 from the outside of the tool post 26 by the hose 176, the cutting fluid injection nozzle 186 is connected to the second fluid passage 80, and the cutting fluid injection nozzle is connected. When the cutting fluid is supplied from the outside of the drill 110 without a fluid passage by 86, it is not necessary to prevent the cutting fluid from leaking from the tool insertion hole 150, and the adjustment screw may have a fluid passage. A screw 154 is used. As in the case where the cutting tool holder 30 shown in FIG. 3 holds the drill 110 without liquid passage on the tool holding shaft 46, it is not necessary to use a solid closing adjusting screw. A common adjustment screw can be used regardless of whether the rotary cutting tool has a liquid passage therein or not.
[0047]
In the above embodiment, the on-off valve 220 is a spool valve, but it may be a seat valve like the on-off valve 270 shown in FIG. A stepped through hole 278 is formed in the connection housing body 276 constituting the connection housing 274 of the connection device 272 with the on / off valve 270 provided with the on / off valve 270, and the joint member 282 is axially formed in the small diameter hole portion 280. It is slidably fitted. The joint member 282 has a stepped shape, is sealed by the seal member 286 at the large diameter portion 284, and is slidably fitted into the small diameter hole portion 280. The joint member 282 includes a seal ring 288 similarly to the joint member 206 of the above-described embodiment, and the end surface of the seal ring 288 constitutes the distal end surface 290. An annular liquid chamber 294 is provided between the small-diameter portion 292 and the small-diameter hole portion 280 of the joint member 282, and the connection member 282 opens in the distal end surface 290 and communicates with the liquid chamber 294. A passage 296 is formed.
[0048]
The valve element 300 of the on-off valve 270 is integrally provided on the small diameter portion 292 of the joint member 282. The outer peripheral surface of the valve element 300 has a tapered shape in which the diameter gradually increases as the distance from the small diameter portion 292 increases, and is accommodated in the large diameter hole portion 302 of the through hole 278. The opening of the large-diameter hole 302 is closed by a plug 304 and constitutes a connection housing 274 together with the connection housing body 276. Further, a tapered valve seat 306 corresponding to the taper of the valve element 300 is formed at a boundary portion between the large diameter hole portion 302 and the small diameter hole portion 280. The valve element 300 is integrally provided with a piston 310. The piston 310 is larger in diameter than the large-diameter portion 284 of the joint member 282, and the joint member 282 is made to move the piston 310 by a spring member 312 as an elastic member which is a kind of biasing means accommodated in the large-diameter hole 302. And is biased in a direction protruding from the connection housing body 276. Furthermore, the large-diameter hole 302 is connected to a cutting fluid supply source by a fluid passage 314 formed in the connection housing body 276. The fluid passage 314 constitutes a first fluid passage and a fluid pressure introduction passage, and the fluid pressure in the first fluid passage is a pressure receiving surface 316 facing away from the front end surface 290 of the joint member 282 of the piston 310. Act on. The portion of the connection housing 274 in which the piston 310 is fitted, the piston 310 and the fluid passage 314 constitute a fluid pressure urging device 318.
[0049]
In the turret device provided with the connection device 272 with the on-off valve, when the tool post 26 is brought close to the turret housing, the tip end surface 290 comes into contact with the periphery of the opening of the second liquid passage 80 of the tool post 26, and the second liquid passage 80 And the connection passage 296 are connected. When the tool post 26 is further moved closer to the turret housing, the joint member 282 is pushed into the connection housing body 276 against the urging force of the spring member 312, and the valve element 300 is separated from the valve seat 306. The large-diameter hole 302 and the liquid chamber 294 are communicated, and the liquid passage 314 and the second liquid passage 80 are communicated. Therefore, the cutting fluid supplied from the cutting fluid supply source at the time of machining is supplied to the second fluid passage 80 through the fluid passage 314, the large-diameter hole portion 302, the fluid chamber 294, the connection passage 296, and the inside of the cutting tool or It is supplied to the cutting tool from the outside. In addition to the urging force of the spring member 312, the urging force based on the hydraulic pressure acting on the pressure receiving surface 316 of the piston 310 acts on the joint member 282 in the protruding direction, and the tip end surface 290 of the joint member 282 is attached to the tool post 26. It is pressed with sufficient strength around the opening of the second liquid passage 80. The hydraulic pressure of the cutting fluid also acts on the valve element 300 and the joint member 282 in the direction in which the front end surface 290 moves away from the periphery of the opening of the second liquid passage 80, but from the area of the pressure receiving surface on which the hydraulic pressure in that direction acts. However, the area of the pressure receiving surface that receives the hydraulic pressure acting in the direction in which the joint member 282 is pressed against the periphery of the opening of the second fluid passage 80 is larger, and the tip surface 290 is separated from the periphery of the opening of the second fluid passage 80 and the cutting fluid. Will not leak.
[0050]
In the embodiment, the turret 26 of the turret device has a circular cross-sectional shape, and the shaft holders 42 and 122 are provided in the turret 26. However, the cross-sectional shape is polygonal (for example, octagonal or decagonal). The present invention can also be applied to a turret device having a tool post that forms the above. This turret has a large number of flat mounting surfaces on the outer peripheral surface, and a rotating cutting tool such as a non-rotating cutting tool such as a cutting tool or a drilling tool is mounted on these mounting surfaces. The tool holding unit 30 and the second liquid passage 80 are integrated into a unit, and are attached to and detached from the mounting surface of the tool post. Alternatively, the second liquid passage may be provided at a position corresponding to each of a large number of mounting surfaces inside the tool post, and only the cutting tool holding unit 30 may be attached to and detached from the tool post as a unit.
[0051]
In the above embodiment, the tool holding shaft has a collet chuck. However, a tool holder having a collet chuck is provided separately from the tool holding shaft, and the tool holder cannot rotate relative to the tool holding shaft. The rotary cutting tool may be attached to and detached from the tool holder attached to the tool holding shaft while being attached and detached so as not to be relatively movable in the direction. The tool holder functions as a tool holding shaft after being attached to the tool holding shaft, and a tool insertion hole provided in the tool holder constitutes a tool insertion hole of the tool holding shaft. Also in this case, if the rotary cutting tool held by the tool holding shaft is a hole machining tool having a liquid passage penetrating in the axial direction inside, for example, the cutting fluid supplied from the second liquid passage is supplied to the tool holding shaft. Can be supplied to the tool insertion hole in the tool holder, and the cutting fluid can be supplied from the inside of the hole machining tool.
[0052]
Further, as shown in FIGS. 2 and 3, in the cutting tool holding unit 30 including a tool holding shaft 46 that can rotate around an axis parallel to the tool post rotation axis, the cutting tool holding unit 30 shown in FIGS. 4 and 5 is used. As described above, the second fluid passage 80 and the tool insertion hole 54 may be communicated from the outside of the tool rest 26 using a connecting member such as a hose to supply the cutting fluid. The connecting member may be connected to the cutting fluid injection nozzle mounting portion on the second fluid passage 80 side, or may be connected to the second fluid passage 80 at a portion different from that. 4 and 5, the second liquid passage 80 and the tool insertion hole 150 are formed inside the tool post 26 as in the cutting tool holding unit 30 shown in FIGS. 2 and 3. You may make it communicate.
[0053]
In addition, even if the rotary cutting tool has a liquid passage inside, the cutting fluid spray nozzle attached to the cutting fluid spray nozzle mounting portion and connected to the second fluid passage causes the cutting fluid from the outside of the rotary cutting tool. May be supplied.
[0054]
In addition, the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing a turret device that is equipped with an on-off valve connecting device according to an embodiment of the present invention, and a headstock according to an embodiment of the present invention.
FIG. 2 is a plan sectional view showing one of cutting tool holding portions provided on a tool post that is a component of the turret device.
FIG. 3 is a plan sectional view showing another one of cutting tool holding portions provided on the tool post.
FIG. 4 is a plan sectional view showing still another cutting tool holding portion provided on the tool post.
FIG. 5 is a plan sectional view showing still another one of cutting tool holding portions provided on the tool post.
FIG. 6 is a side sectional view showing a state in which the joint member of the connection device with the on / off valve provided in the turret device is separated from the second liquid passage and the on / off valve is closed.
FIG. 7 is a side sectional view showing a state in which the joint member of the connection device with the on-off valve is brought into contact with the periphery of the opening of the second liquid passage and the on-off valve is opened.
FIG. 8 is a front sectional view showing a sealing member used for sealing a tool holding shaft in the cutting tool holding unit.
FIG. 9 is a side cross-sectional view showing a connection device with an on-off valve that is another embodiment of the present invention.
[Explanation of symbols]
20: Turret device 26: Tool post 30: Cutting tool holder 46: Tool holding shaft 54: Tool insertion hole 58: Drill with liquid passage 80: Second liquid passage
110: Drill without liquid passage 120: Tool holding shaft 150: Tool insertion hole
190: Connection device with on-off valve 202: Device main body 206: Joint member 210: Tip surface 212: Connection passage 220: On-off valve 228: Piston
240: Spring member 250: Fluid pressure introduction passage 256: Fluid pressure biasing device 270: On-off valve 272: On-off valve connection device 282: Joint member 290: Tip surface 296: Connection passage 312: Spring member 318: Fluid pressure biasing device

Claims (3)

The device body;
A tool post which is held by the apparatus main body so as to be rotatable around a rotation axis and movable in a direction parallel to the rotation axis, and having a plurality of cutting tool holding parts;
A clamping device that moves the tool post close to the apparatus main body and fixes the turret so as not to rotate relative to the apparatus main body, while being spaced apart from the apparatus main body and enabling relative rotation with respect to the apparatus main body,
In a state where the clamping device enables relative rotation of the tool post with respect to the apparatus main body, the tool post is rotated with respect to the apparatus main body, and each of the plurality of cutting tool holding portions is selectively set to a predetermined operation position. A turret rotation device for positioning to
Wherein the connection device and for connecting the second fluid passage formed in the first fluid passage and the knives stand formed instrumentation Okimoto body, before Symbol at least one of the plurality of cutting tool holding section, holding its cutting tool A fluid passage of a cutting tool held by the part and the second fluid passage are in communication with each other, and the connection device includes:
A front end surface that is slidably fitted in the apparatus main body so as to be slidable in the axial direction and that can contact the periphery of the opening of the second liquid passage formed in the tool rest when the apparatus main body and the tool rest are approached, A joint member provided with an open connection passage;
A spring member for biasing the joint member in a direction protruding from the apparatus main body;
When the joint member is in the projecting end position where it protrudes most, the connection passage and the first liquid passage are closed, and the joint member is pushed toward the apparatus main body against the biasing force of the spring member. An open / close valve that is in an open state that allows the connection passage and the first liquid passage to communicate with each other;
A housing fixed to the device body;
A piston fixed to the joint member and slidably fitted to the housing;
A fluid pressure introduction passage for guiding the fluid pressure of the first fluid passage into the housing and acting on a pressure receiving surface opposite to the tip surface of the piston;
An atmospheric pressure chamber for applying an atmospheric pressure to a surface of the piston opposite to the pressure receiving surface;
A turret device comprising: A connecting device for connecting the first liquid passage formed in the first member to the second liquid passage formed in the second member,
A front end face that is slidably fitted to the first member in the axial direction and that can contact the periphery of the opening of the second liquid passage of the second member when the first member and the second member approach each other; A joint member provided with a connection passage that opens to the tip surface;
A spring member for biasing the joint member in a direction protruding from the first member;
In the state where the joint member is at the most projecting end position, the connection passage and the first liquid passage are closed, and the joint member moves toward the first member against the biasing force of the spring member. An on-off valve that is in an open state that allows the connection passage and the first liquid passage to communicate with each other in the pushed state;
Look containing a liquid urge biasing device for imparting a biasing force in the projecting direction to the joint member on the basis of the hydraulic pressure of the first liquid passage and the liquid urge biasing device,
A housing fixed to the first member ;
A piston fixed to the connection member and slidably fitted to the housing;
A fluid pressure introduction passage for guiding the fluid pressure of the first fluid passage into the housing and acting on a pressure receiving surface opposite to the tip surface of the piston;
An atmospheric pressure chamber for applying an atmospheric pressure to a surface of the piston opposite to the pressure receiving surface;
A connection device with an on-off valve , comprising: The connection device with an on-off valve according to claim 2, wherein the on-off valve is a spool valve, and a spool of the spool valve, the connecting member, and the piston are integrally formed.

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