JP5954021B2 - Machine tool and product discharge method - Google Patents

Description

  The present invention relates to a machine tool and a product discharge method.

  In a machine tool, a rod-shaped material (work) that is gripped by a rotatable spindle and processed is cut into a single product and discharged to a predetermined location. For example, when the machine tool is provided with a back spindle, a cut-off process is performed along with the synchronous rotation of the spindle and the back spindle while gripping the workpiece after machining with the spindle and the back spindle (chuck provided for each of the spindle and the back spindle) The back spindle holding the separated product can move the product. However, machine tools do not always have a back spindle. Even if a back spindle is provided, depending on the size and shape of the product after processing, it may not be gripped by the back spindle.

  In addition to the configuration in which the back spindle is used for collecting and discharging the product, a configuration is also known in which a bucket is disposed below the workpiece, and the product that is separated and dropped is received by the bucket and collected (Patent Document 1). reference.).

Japanese Patent Laid-Open No. 2005-40903

  In the configuration in which the product that is separated from the workpiece and dropped is received by the bucket placed below, and the bucket is moved to a predetermined place, the bucket has a certain depth so that the product does not fall during movement. There is a need. In addition, a margin for space for arranging such a bucket below the workpiece that is separated and dropped is required in the machine tool. However, in a machine tool, various structures, such as a cutter used for the above-mentioned cut-off process and a tool rest on which the cutter is mounted, may exist. For this reason, there may be no structural allowance for space for arranging the bucket as described above below the workpiece. In such a case, it is difficult to mechanically collect and discharge the products, and it is necessary to manually collect the processed products one by one.

  The present invention has been made in order to solve at least the above-mentioned problems, and in contrast to the conventional situation where the product cannot be collected and discharged by the back spindle and has to be manually collected and discharged. The present invention provides a machine tool and a product discharge method that can efficiently discharge a product.

  One of the aspects of the present invention is that the machine tool includes a spindle that can rotate by gripping a workpiece, a tool spindle that can rotate and move, and a hollow tool that is only on one surface among a plurality of surfaces facing outward. A cage portion having an opening of a size capable of inserting a workpiece; and a detaching means that can act on the gripped workpiece and detach a partial range on the tip side of the workpiece. The tip end side of the gripped work is inserted into the car part from the opening, and the detachment means performs the detachment by acting on a position outside the car part of the gripped work, and the tool spindle is The work received by the car portion by the separation is transported to a predetermined discharge position.

According to the present invention, in the machine tool, the partial range on the tip side is separated in a state where the partial range on the tip side of the workpiece is wrapped in the cage portion mounted on the tool spindle. Then, the work (product) received by the car part by the separation is transported to the discharge position while being held in the car part. In other words, even if the product cannot be collected / discharged by the back spindle and the bucket as described above cannot be placed under the workpiece due to the structure of the machine tool, the cage that wraps the tip of the workpiece It can be used to discharge the product after separation, and there is no need for labor in discharging the product. In addition, the tool spindle may be rotated around the axis of the tool spindle after the detachment and before or during the transportation, or the cage may be centered on a predetermined axis. The opening may be directed upward from the horizontal direction by at least one of turning.

  The technical idea of the present invention can be realized by means other than machine tools. For example, it is possible to grasp the invention of a method having processing steps executed by each configuration of a machine tool. Specifically, a tool spindle that can be rotated and moved with a cage portion having an opening that can be inserted into only one of a plurality of surfaces that are hollow and facing outward is rotatable. An insertion step of inserting the tip end side of the workpiece gripped by the main shaft into the cage portion from the opening and a tool is applied to a location outside the cage portion of the gripped workpiece so that the tip side of the workpiece is It is possible to grasp a product discharge method having a separation step for separating a part range and a transporting step in which the tool spindle transports the workpiece received by the cage to the predetermined discharge position by the separation. . It is also possible to grasp the invention of a computer-readable program that controls each component of the machine tool to realize each processing step.

It is a figure which shows schematic structure of NC lathe. It is a figure which shows the partial range in NC lathe concerning a 1st Example from the viewpoint of a Z-axis direction. It is a figure which shows the structure shown in FIG. 2 from a perpendicular | vertical viewpoint with respect to the surface containing the axis of a Z-axis and a tool spindle. It is a figure which shows the one scene after the cutting-off process concerning a 1st Example. It is a figure which shows the other one scene after the cutting-off process concerning a 1st Example. It is a figure which shows the partial range in NC lathe concerning a 2nd Example from the viewpoint from a perpendicular upper direction. It is a figure which shows the structure shown in FIG. 2 from the viewpoint perpendicular | vertical to the axial center of a tool main axis | shaft. It is a figure which shows the one scene after the cutting-off process concerning a 2nd Example. It is a figure which shows another one scene after the cutting-off process concerning a 2nd Example. It is a partial cross section figure of the cage | basket | car part concerning one modification. It is a perspective view which shows a part of cage main body concerning another modification.

As an embodiment of the present invention, the tool spindle may have the opening directed upward from the horizontal direction by a first rotation after the separation and before or during the transportation.
According to the said structure, it can prevent that a product falls from opening of a cage | basket | car part before a product is conveyed to a discharge position.

As an embodiment of the present invention, the tool spindle may be configured such that the tip end side of the gripped workpiece is inserted into the cage portion from the opening in a state where the axis is not parallel to the spindle.
According to the said structure, the tool main axis | shaft can make the opening of a cage | basket part orient | assign to an upper side rather than a horizontal direction by rotating a cage | basket part by a predetermined angle around an axis center after the said cutting | disconnection. .

As an embodiment of the present invention, the car part may include an auxiliary mechanism that assists discharge of the work from the car part.
According to this configuration, when the product is transported to the discharge position by the tool spindle, the product can be reliably discharged from the cage portion by assisting the discharge of the workpiece from the cage portion by the auxiliary mechanism.

The said cage | basket | car part is good also considering the at least one part other than the surface which has an opening among the said several surfaces as a net shape.
In machining (for example, the above-described separation) on the workpiece, a coolant liquid is sprayed on the workpiece. Therefore, the coolant liquid also enters the cage that wraps a part of the workpiece. According to the said structure, since at least one part of a cage | basket part is net | network (mesh shape), it is prevented that a coolant liquid accumulates in a cage | basket part.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
(1) Outline of Apparatus FIG. 1 illustrates a schematic configuration of an NC (Numerical Control) lathe 100 according to this embodiment from one side. The NC lathe 100 is a kind of machine tool. The housing 100a of the NC lathe 100 houses the machining chamber 30, the coolant liquid tank 40, and the like. In the machining chamber 30, roughly, a headstock 10, a tool headstock 12, an automatic tool changer (ATC) 14, a tool stage 16, a tool magazine 18, and an intermediate station 21 are in predetermined positions, respectively. It is arranged. In the example shown in FIG. 1, the coolant liquid tank 40 is provided below the processing chamber 30 and stores therein coolant liquid as cutting oil. However, the coolant liquid tank 40 may exist outside the casing 100a.

  The NC lathe 100 includes an NC device 50 outside (but may be inside) the casing 100a. The NC device 50 is mainly composed of a computer, and further includes a display (not shown) as a display screen for the user and an operation receiving unit (not shown) such as a button for receiving an operation from the user. The NC device 50 has a predetermined machining program 50a for machining the workpiece W mounted in the memory. The NC device 50 sends commands to the components such as the headstock 10, the tool headstock 12, the ATC 14, the tool table 16, the tool magazine 18, and the intermediate station 21 in accordance with the machining program 50a. It is possible to individually control the operation states (movement, rotation, turning, etc.) individually. Further, the NC device 50 realizes a product discharge method described later by executing control according to the machining program 50a.

The headstock 10 has a main shaft 11 facing the Z-axis direction, and performs rotation control of the main shaft 11 (rotational speed control or rotation angle control called C1 axis control). In the example shown in FIG. 1, the Z-axis is directed horizontally. The main shaft 11 can grip a workpiece W as a processing target by a gripping tool (chuck) 11a at the tip.
The tool spindle stock 12 has a tool spindle 13. The tool spindle stock 12 performs rotation control around the axis of the tool spindle 13 (rotational speed control or rotation angle control called C2 axis control). The tool head stock 12 can move in a plurality of axial directions orthogonal to each other. Furthermore, the tool spindle stock 12 can control the turning angle of the tool spindle 13 around a predetermined axis (so-called B-axis control).

  The ATC 14 appropriately attaches, for example, a tool 19 used for machining the workpiece W gripped by the spindle 11 or a cage 20 described later to the tool spindle 13 of the tool spindle table 12 at a predetermined initial position. Further, the mounted tool 19 and the cage portion 20 can be detached from the tool spindle 13. Although simplified in FIG. 1, a plurality of types of tools 19, a cage portion 20, and the like are mounted on the tool magazine 18. For example, the ATC 14 acquires the tool 19 and the like from the tool magazine 18 by the turning unit 15, aligns the acquired tool 19 and the like with the tool spindle 13 by the turning operation of the turning unit 15, and attaches the tool 19 to the tool spindle 13. Further, the ATC 14 removes the tool 19 and the like from the tool spindle 13 by the turning unit 15 and turns the turning unit 15 to return the removed tool 19 and the like to the tool magazine 18 side. An intermediate station 21 is interposed between the ATC 14 and the tool magazine 18. The intermediate station 21 realizes delivery of the tool 19 and the like from the tool magazine 18 side to the ATC 14 side and delivery of the tool 19 and the like from the ATC 14 side to the tool magazine 18 side.

  The tool table 16 includes a tool 17 used for processing the workpiece W gripped by the spindle 11. A so-called turret is formed on the tool table 16. The turret is provided with a plurality of surfaces, and a tool 17 is provided on each surface. The tool 17 may be a fixed tool or a rotary tool. The tool table 16 is movable in a plurality of axial directions orthogonal to each other.

  Although omitted in FIG. 1, a coolant liquid discharge nozzle is disposed in the housing 100 a in the vicinity of the machining position with respect to the workpiece W (for example, a predetermined position in the vicinity of the tool 17). During machining of the workpiece W according to the machining program 50a, coolant liquid is appropriately discharged from the nozzle. The coolant liquid is effective for lubrication, cooling, chip removal, etc. during processing. In the present embodiment, such coolant liquid can be supplied also to the tool spindle 13 side, and as will be described later, the hydraulic pressure of this coolant liquid is driven for the auxiliary mechanism of the car portion 20 mounted on the tool spindle 13. Use as a source.

(2) First Example Next, a product discharging method performed in the NC lathe 100 will be described.
2-5 is a figure for demonstrating the product discharge | emission method concerning a 1st Example.
FIG. 2 is a view showing a partial range in the NC lathe 100 from a viewpoint from the side facing the front end surface of the workpiece W facing in the Z-axis direction. FIG. 3 is a diagram showing the configuration shown in FIG. 2 from a viewpoint perpendicular to the plane including the Z axis and the axis CL of the tool spindle 13. In FIG. 2 (and FIGS. 4 and 5), the description of the main shaft 11 shown in FIG. 3 is omitted.

  According to FIGS. 2 and 3, the car part 20 is mounted on the tool spindle 13. The cage portion 20 is attached to the tool spindle 13 by the ATC 14 at the timing when the machining of the workpiece W by the tool 17 or the tool 19 (machining necessary before the cutting process described later) is completed, for example. The car portion 20 has a car body 25 on the tip side. The car body 25 is hollow, and has an opening 25b of a size that allows the work W to be inserted only into one of a plurality of surfaces facing outward. Specifically, the opening 25 b is formed in a plane parallel to the axis CL of the tool spindle 13. The material forming the car body 25 may be a metal or a resin. Reference numeral 25c is one of the surfaces constituting the car body 25 and is located on the opposite side of the opening 25b. Hereinafter, the surface indicated by reference numeral 25c is referred to as a bottom surface 25c.

  As shown in FIGS. 2 and 3, the workpiece W gripped by the main shaft 11 (configuration including the chuck 11 a) is inserted from the opening 25 b of the cage portion 20, and a partial range on the tip side of the workpiece W is within the cage body 25. In the space 25a (insertion step). The tool spindle stock 12 on which the tool spindle 13 is mounted is capable of moving along the axis CL direction of the tool spindle 13 and moving along the Z-axis direction, for example. An insertion process is implement | achieved by moving the tool spindle stand 12 to each direction, and inserting the partial range by the side of the front end of the workpiece | work W in the cage main body 25 of the cage | basket part 20 with which the tool spindle 13 is mounted | worn. Further, in the configuration in which the head stock 10 on which the spindle 11 is mounted is movable in the Z-axis direction, the insertion process is not realized only by the movement on the tool spindle 13 side, but is realized together with the movement on the spindle 11 side. May be.

  After the insertion step, the tool 17 is applied to a location outside the cage portion 20 of the workpiece W gripped by the spindle 11, whereby a partial range on the tip side of the workpiece W is separated (separation step). 2 and 3, a so-called cut-off tool 17 is shown as the tool 17 used in the cutting process. The separation process may be called a cut-off process. The tool table 16 on which the tool 17 (the cut-off tool 17) is mounted can be moved along the axial center CL direction and moved along the Z-axis direction, for example. Therefore, the separation step can be realized by rotating the spindle 11 and moving the tool table 16 in each direction. That is, a partial range on the tip side of the workpiece W is obtained by applying the cut-off tool 17 to a position between the spindle 11 of the workpiece W rotated by the spindle 11 and the opening 25b of the cage portion 20 (see FIG. 3). Disconnect. The cut-off tool 17 and the mechanism for moving the tool correspond to an example of the separating means. The work W separated and received in the car unit 20 (the space 25a in the car body 25) is a product to be transported and discharged.

  After the cutting process, the tool spindle 13 transports the workpiece W received by the car unit 20 to a predetermined discharge position (transporting process). 4 and 5 are views showing each scene after the separation process from the same viewpoint as FIG. When FIG. 4 is compared with FIG. 2, the tool spindle 13 is rotated 90 ° by the C2 axis control, and the car portion 20 is also rotated 90 ° with the rotation (first rotation). In the present embodiment, the tool spindle 13 has the tip side of the workpiece W inserted into the car portion 20 with the axis CL at an angle not parallel to the direction of the spindle 11 (Z-axis direction). As an example, in FIGS. 2, 4 and 5, the axis CL of the tool spindle 13 is maintained at a predetermined angle (60 °) with respect to the horizontal plane H (the installation surface of the NC lathe 100), and the Z axis is It is perpendicular to it. Therefore, as shown in FIG. 4, the tool spindle 13 can cause the opening 25 b of the car portion 20 to face upward in the horizontal direction by the first rotation. Specifically, the opening 25b is directed upward by 30 ° with respect to the horizontal plane H by the first rotation.

  Such first rotation may be executed after the cutting process and before the tool spindle 13 is moved, or after the cutting process, the tool spindle 13 may be moved by a minute distance. The minute distance mentioned here means, for example, the minimum moving distance from the position after the separation step to the position where the car portion 20 or the like can perform the first rotation without interfering with the surrounding structure. To do. After the first rotation, the tool spindle stock 12 moves in a predetermined direction, so that the workpiece W captured by the car portion 20 to which the tool spindle 13 is attached is transported to the discharge position. That is, since the workpiece W is transported with the opening 25b facing upward from the horizontal direction, the workpiece W is prevented from falling from the car portion 20 during transportation. In addition, when the movement of the minute distance is executed before the first rotation, the movement of the minute distance is also a part of the transportation process. In any case, in most or all of the transportation to the discharge position, the workpiece W is transported with the opening 25b facing upward from the horizontal direction.

  FIG. 5 shows a state where the workpiece W has been transported to the discharge position. When FIG. 5 is compared with FIG. 4, the tool spindle 13 is rotated 180 ° by the C2 axis control, and the car portion 20 is also rotated 180 ° with the rotation (second rotation). That is, the second rotation is executed at the discharge position. The discharge position is above the product discharge bucket 60 installed at a predetermined position within the movement range of the tool head stock 12. As a result of the second rotation, the opening 25b of the car portion 20 is directed downward from the horizontal direction. Specifically, by the second rotation, the opening 25b faces downward by 30 ° with respect to the horizontal plane H. Accordingly, the work W in the car portion 20 slides down from the opening 25 b due to gravity and is discharged to the bucket 60. Thereby, the discharge of one product is completed. The transport process may be a concept including the first and second rotations, and a process including the first and second rotations in the transport process may be called a discharge process or the like.

(3) 2nd Example FIGS. 6-9 is a figure for demonstrating the product discharge | emission method by the NC lathe 100 concerning 2nd Example. In the second embodiment, differences from the first embodiment will be mainly described.
FIG. 6 is a view showing a partial range in the NC lathe 100 from a viewpoint from the vertically upward direction. FIG. 7 is a diagram showing the configuration shown in FIG. 6 from a viewpoint that is horizontal and perpendicular to the axis CL of the tool spindle 13. In FIG. 7 (and FIGS. 8 and 9), the description of the main shaft 11 shown in FIG. 6 is omitted.

  As described above, in the present embodiment, the tool spindle 13 causes the tip end side of the workpiece W to be inserted into the car portion 20 with the axis CL at an angle not parallel to the direction of the spindle 11 (Z-axis direction). ing. As an example, in FIGS. 6 and 7, the axis CL of the tool spindle 13 is horizontal and keeps a predetermined angle (45 °) with respect to the Z axis. Corresponding to the orientation of the tool spindle 13, the shape of the front end side of the car portion 20 mounted on the tool spindle 13 is different from that of the first embodiment in FIGS. Specifically, the tip of the car portion 20 is tapered (tapered), and at least one surface of the tapered shape has an angle of 45 ° with respect to the axis CL. When the positions of the tool spindle 13 and the cage portion 20 with respect to the spindle 11 are in the state shown in FIG. 6, the one surface is parallel to the tip surface of the workpiece W gripped by the spindle 11. The car body 27 formed on the front end side of the car part 20 having such a shape has an opening 27b of a size into which the work W can be inserted only on the one surface.

  As shown in FIGS. 6 and 7, the workpiece W gripped by the main shaft 11 (configuration including the chuck 11 a) is inserted from the opening 27 b of the cage portion 20, and a partial range on the tip side of the workpiece W is within the cage body 27. In the space 27a (insertion step). After the insertion step, a partial range on the tip side of the workpiece W is separated by applying a tool (not shown) (not shown) to a place outside the cage portion 20 of the workpiece W gripped by the spindle 11. (Separation process). After the cutting process, the tool spindle 13 transports the workpiece W received by the car unit 20 to a predetermined discharge position (transporting process).

  8 and 9 are views showing each scene after the separation process from the same viewpoint as FIG. When FIG. 8 is compared with FIG. 7, the tool spindle 13 is rotated 90 ° by the C2 axis control, and the car portion 20 is also rotated 90 ° with the rotation (first rotation). At the time of the separation step, the opening 27b of the car portion 20 is oriented in the horizontal direction, and the axis CL of the tool spindle 13 and the Z axis of the spindle 11 are kept at 45 ° as described above. Therefore, by the first rotation, the tool spindle 13 can cause the opening 27b of the car portion 20 to face upward from the horizontal direction. Specifically, by the first rotation, the opening 27b faces upward by 45 ° with respect to the horizontal direction. As a result, the workpiece W is transported in a state where the opening 27b is directed upward from the horizontal direction.

  FIG. 9 shows a state where the workpiece W has been transported to the discharge position. When FIG. 9 is compared with FIG. 8, the tool spindle 13 is rotated 180 ° by the C2 axis control, and the car portion 20 is also rotated 180 ° with the rotation (second rotation). As a result of the second rotation, the opening 27b of the car portion 20 is directed downward from the horizontal direction. Specifically, due to the second rotation, the opening 27b faces downward by 45 ° with respect to the horizontal direction. The work W in the car portion 20 slides down from the opening 27b due to gravity and is discharged to the bucket 60.

(4) Effect As described above, according to the present embodiment (each example), the NC lathe 100 can insert the workpiece W into the tool spindle 13 only on one surface among a plurality of surfaces that are hollow and face outward. A cage portion 20 having a size opening (25b, 27b) is mounted. Then, the partial range on the tip side is separated in a state where the partial range on the tip side on which the workpiece W has been processed is wrapped in the cage 20 attached to the tool spindle 13. That is, when the back spindle cannot be used for collecting and discharging the product, and the conventional large bucket cannot be disposed at the position for receiving the workpiece W falling due to the separation due to the structure of the NC lathe 100. Even so, according to the present embodiment, the tip of the workpiece W can be reliably captured by the car portion 20 in a narrow space near the workpiece W. And the workpiece | work spindle 13 which mounted | wore with the cage | basket | car 20 which received the isolate | separated workpiece | work W is conveyed to a discharge position, and the workpiece | work W after isolation | separation can be discharged | emitted efficiently. This eliminates the need for manual labor for product discharge as in the prior art.

  Moreover, by performing said 1st rotation, it can prevent reliably that the workpiece | work W falls from the cage | basket | car part 20 during transport. Moreover, the workpiece | work W can be discharged | emitted from the cage | basket | car part 20 easily and reliably by performing said 2nd rotation.

(5) Modified Examples The present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof. For example, the following modified examples are also possible. A configuration obtained by combining a part or all of each embodiment or each modification is also within the scope of disclosure of the present invention.

  FIG. 10 is a simplified cross-sectional view of a modification of the car portion 20 attached to the tool spindle 13. The said modification is a modification of the cage | basket part 20 shown to FIGS. In FIG. 10, the hatching of the cross-sectional portion is omitted for easy view. In FIG. 10, the car portion 20 generally includes a base portion 26 and a car body 25 provided on the distal end side of the base portion 26. The base 26 has a piston 26a inside. The coolant liquid is supplied to the rear end surface of the piston 26a through the pipe L, and the piston 26a can move along the axis CL in the base portion 26 by the hydraulic pressure of the coolant liquid. Supply of the coolant liquid to the piston 26a is also controlled by the machining program 50a. The piston 26a and the car body 25 are connected by a connecting portion 26b. The connecting portion 26b is rotatably connected to each of the connecting portion 26c on the piston 26a side and the connecting portion 25d on the car body 25 side.

  In such a configuration, as the piston 26a moves forward (moves toward the tip of the car portion 20), the car body 25 rotates about the shaft 25e in the direction of the arrow A shown in the figure (in FIG. 10, a two-dot chain line). (Refer to the position of the car body 25 shown.) As a result, the car body 25 is inclined with respect to the base 26. On the other hand, with the retraction of the piston 26a, the car body 25 rotates around the shaft 25e in the direction opposite to the arrow A shown in the figure, and is the original position (see the position of the car body 25 shown by the solid line in FIG. 10). Return to. For example, in the scene at the discharge position illustrated in FIG. 5, by tilting the car body 25 as shown in FIG. 10, the opening 25 b becomes more downward with respect to the horizontal direction, and the work W in the space 25 a becomes the bucket 60. It becomes easy to slip off. For example, depending on the shape, material, etc. of the workpiece W after separation, it may be difficult to slip off the opening 25b with a gentle inclination. However, by providing a configuration in which the opening 25b is further inclined downward as in the modification example, The workpiece W can be discharged to the outside of the car portion 20. The configuration in which the opening 25b is further inclined downward (the configuration provided in the car unit 20 illustrated in FIG. 10) corresponds to an example of an auxiliary mechanism that assists the discharge of the workpiece W from the car unit 20.

Moreover, the cage | basket | car part 20 is good also considering making at least one part other than the surface which has an opening (25b, 27b) into the net shape among the several surfaces which face the car main body (25, 27) which face outside.
FIG. 11 exemplifies a configuration in which a part thereof is net-like. FIG. 11 shows a state in which the bottom surface 25c of the car body 25 is configured by a mesh 25c1. As described above, during machining of the workpiece W, the coolant liquid is sprayed onto the workpiece W. Therefore, the coolant liquid also enters the car portion 20 from the opening 25b. When the coolant liquid is stored in the car portion 20, for example, the workpiece W may jump out of the car portion 20 according to the momentum of the coolant liquid immediately after the separation. Therefore, the coolant liquid is discharged from the car portion 20 by configuring at least a part of the car body (25, 27) other than the openings (25b, 27b) in a net shape as described above. That is, the harmful effect of the coolant liquid accumulating in the car portion 20 does not occur.

  In the above, the first rotation is 90 ° rotation and the second rotation is 180 ° rotation, but the angles of the first rotation and the second rotation are not limited to such specific values. Also good. In the first rotation, it is sufficient to rotate so that at least the opening (25b, 27b) of the car part 20 faces upward in the horizontal direction, and in the second rotation, at least the opening (25b, 27b) of the car part 20 is horizontal. What is necessary is just to rotate so that it may face downward from a direction.

  In the above description, the first rotation and the second rotation are both realized by the C2 axis control of the tool spindle 13, but may be realized by the B axis control. For example, in the configuration shown in FIG. 2, after the workpiece W separation step, the tool head stock 12 rotates the tool spindle 13 about the B axis so that the direction of the opening 25b of the cage portion 20 is more than the horizontal direction. Make it up. Then, the work W in the car portion 20 is transported to the discharge position or discharged to the bucket 60 by the movement of the tool spindle 13 or further turning. That is, part or all of the first rotation, the transport of the workpiece W, and the second rotation may be realized by the rotation of the tool spindle 13 around the B axis. Moreover, you may implement | achieve combining 1st rotation and 2nd rotation with C2 axis control and B axis control of the tool spindle 13. FIG.

  In the product discharge method using the NC lathe 100, either one or both of the first rotation and the second rotation may not be performed. For example, when the workpiece 11 is inserted into the opening (25b, 27b) of the car part 20, the direction of the opening (25b, 27b) is set to be slightly higher than the horizontal direction. By doing so, after the separation step, the workpiece W can be transported to the discharge position without dropping the workpiece W from the openings (25b, 27b), so that it is not necessary to intentionally execute the first rotation. Further, at the discharge position, a power mechanism for assisting discharge of the work W from within the car portion 20 that discharges the work W to the outside from the car portion 20 with the openings (25b, 27b) facing upward from the horizontal direction. By providing a kind of mechanism), the second rotation can be omitted.

  Further, the inclination (60 °) of the axis CL of the tool spindle 13 with respect to the horizontal plane H shown in the first embodiment and the inclination (45 °) with respect to the Z-axis direction of the axis CL of the tool spindle 13 shown in the second embodiment. ) Is merely an example, and in the present invention, those inclinations are not limitedly interpreted by the numerical values described above. For example, regarding the positional relationship between the spindle 11 and the tool spindle 13 when the car portion 20 wraps the tip of the workpiece W, consideration is given to the prevention of dropping and the ease of discharging according to the length and shape of the workpiece W to be separated. What is necessary is just to employ | adopt optimal positional relationship. In addition, a plurality of car parts 20 having different car body shapes according to different products are provided in the tool magazine 18 in advance, and the car part 20 to be used after the insertion process is selected by the ATC 14 according to the processing content of the work W. Then, it may be mounted on the tool spindle 13.

DESCRIPTION OF SYMBOLS 10 ... Spindle base, 11 ... Spindle, 11a ... Gripping tool, 12 ... Tool spindle base, 13 ... Tool spindle, 14 ... ATC, 16 ... Tool stand, 17 ... Tool, parting tool, 20 ... Cage part, 25, 27 ... Car body, 25a, 27a ... space, 25b, 27b ... opening, 25c ... bottom surface, 25c1 ... mesh, 25d ... connecting portion, 25e ... shaft, 26 ... base, 26a ... piston, 26b ... connecting portion, 26c ... connecting portion, 40 ... Coolant liquid tank, 50 ... NC device, 50a ... Machining program, 60 ... Bucket, 100 ... NC lathe, CL ... Axis center, L ... Pipe, W ... Workpiece

Claims (5)

A spindle that can rotate by gripping the workpiece,
A tool spindle that can be rotated and moved;
A cage portion having an opening of a size capable of inserting the workpiece only on one surface of a plurality of hollow surfaces facing outwards;
Detaching means capable of acting on the gripped workpiece and detaching a partial range on the tip side of the workpiece,
The tool spindle is inserted into the cage portion from the opening to the tip side of the gripped work,
The detaching means performs the detachment by acting on a location outside the cage portion of the gripped work,
The tool spindle transports the workpiece received by the car part to the predetermined discharge position by the separation ,
The tool spindle rotates the car part around the axis of the tool spindle or turns the car part around a predetermined axis after the separation and before or during the transportation. A machine tool characterized by causing the opening to face upward from the horizontal direction by at least one of the above . 2. The machine tool according to claim 1, wherein the tool spindle inserts the tip end side of the gripped workpiece into the cage portion from the opening in a state where the axis is not parallel to the spindle. 3. . The car unit, machine tool according to claim 1 or claim 2, characterized in that it comprises an auxiliary mechanism for assisting the discharge of the workpiece from the basket portion. The machine tool according to any one of claims 1 to 3 , wherein the cage portion has at least a part of the plurality of surfaces other than the surface having an opening in a net shape. A rotatable and movable tool spindle equipped with a cage having an opening that can be inserted into only one of a plurality of hollow surfaces facing outward is gripped by a rotatable spindle. An insertion step of inserting the tip side of the workpiece into the cage portion from the opening;
A detaching step of detaching a partial range on the tip side of the work by causing a tool to act on a location outside the cage portion of the gripped work,
The tool spindle, have a, a transport step of transporting the workpieces received in the cage portion to a predetermined discharge position by the disconnection,
In the transporting step, the tool spindle is rotated around the axis of the tool spindle after the detachment and before the transportation or in the middle of the transportation, or the car part is rotated to a predetermined axis. A product discharging method comprising the step of turning the opening upward from the horizontal direction by at least one of swiveling around

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