JP3755322B2 - Fixing jig for workpiece positioning - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a jig for supporting and positioning and fixing a workpiece such as an automobile part, particularly when a workpiece having a hollow portion is processed or conveyed.
[0002]
[Prior art]
Currently, in various machining processes such as manufacturing automobile parts, especially when machining a single workpiece in multiple steps, a jig is provided on a movable carriage called a pallet, and the workpiece is fixed to this jig. And processing and conveyance between processes are performed.
[0003]
An example of such a jig for fixing a workpiece is schematically shown in a sectional view in FIG. This jig is used when processing knuckle steering of an automobile. A jig 30 shown in FIG. 6 includes a fixing base 32 on the base plate 31, a seat ring 33, a cylinder 34 attached below the base plate 31, a shaft 36 coupled to the rod 35 of the cylinder 34, and a fixing member 37. 37 slides with respect to the shaft 36 at the inner periphery thereof, and slides with respect to the inner surface of the fixed base 32 at the outer periphery thereof. Further, the groove 37a of the fixture 37 and the protrusion 32a provided on the inner surface of the fixture base are engaged, so that the vertical movement of the fixture 37 is restricted. The fixture 37 also includes a three-claw clamper 38. The three-claw clamper 38 is rotatably supported by the fixture 37, abuts against the tip of the shaft 36, and is urged by a cap 40 elastically supported by a spring 39 provided on the upper portion of the fixture 37. Has been.
[0004]
Next, a procedure for fixing the workpiece in the jig 30 will be described. First, the seat ring 33 is fixed to the fixing base 32, and then the cylinder 34 is operated to extend the rod 35 upward, thereby raising the fixture 37. Further, the workpiece 41 is placed on the seat ring 33 with the fixture 37 passing through the opening 41a in the center. Thereafter, when the rod 35 is contracted, the fixture 37 descends accordingly, but the protrusion 32a comes into contact with the upper end of the groove 37a, and thereafter only the shaft 36 descends. For this reason, the three-claw clamper 38 pressed by the cap 40 rotates outward, and the tip part thereof engages with the stepped part 41b on the inner surface of the workpiece 41. As a result, the workpiece 41 is fixed on the jig 30.
[0005]
However, in this jig 30, since the center position is positioned by fitting the inner peripheral surface of the seat ring 33 and the outer peripheral surface of the workpiece 41, the center positioning accuracy of the workpiece 41 is low, and the workpiece 41 and the seat A gap is formed between the ring 33 and the ring 33. For this reason, there are problems that accuracy during machining is reduced, and tool damage is caused by rattling of a workpiece during machining. Further, as shown in FIG. 6, when all the three claws of the three-claw clamper 38 do not engage with the workpiece 41, there is a problem that the workpiece cannot be reliably fixed.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to propose a jig for fixing a workpiece that can solve the above-described problems and can easily and reliably fix the workpiece.
[0007]
[Means for solving the problems and their functions and effects]
A jig according to the present invention is a jig for positioning and fixing a workpiece for processing or conveying a workpiece having a hollow portion , and includes a base plate, a workpiece fixing base provided on the base plate, and the workpiece. A workpiece positioning and fixing device provided at the center of the workpiece fixing base, the workpiece positioning and fixing device pinching and fixing the outer surface of the workpiece, and a hollow of the workpiece A second fixing tool that is inserted into the part and sandwiches and fixes the end face of the hollow part; and a drive unit that operates the first and second fixing tools.
[0008]
According to the jig according to the present invention, since the workpiece is positioned and fixed at the same time by different fixtures on the outer surface and the inner surface, the workpiece is securely fixed to the jig, In addition, since the positioning accuracy can be improved, the processing accuracy can be increased, and damage to the tool during processing can be avoided.
[0009]
In a preferred embodiment of the jig according to the present invention, the driving unit may include a screw member and a shaft member that is screwed up and down with the screw member , and includes a hydraulic cylinder and the hydraulic cylinder. And a shaft member that moves up and down.
[0010]
In a preferred embodiment of the jig according to the present invention, the first fixing tool is fitted between the workpiece and the workpiece fixing base to fix the workpiece, and an outer peripheral surface is tapered. A collet chuck having a shape; a support member that supports the collet chuck integrally with the collet chuck and that moves up and down by engaging with a shaft member of the drive unit; and an elastic member that elastically supports the support member; may comprise a, also the second fasteners, for securing the workpiece with engaging with said workpiece, and a claw member rotatably supported outwardly to the fixture, A second shaft member provided on an outer periphery of the shaft member of the drive unit so as to be engaged with and slidable with the shaft member; and a lid member for urging the claw member by a second elastic member. member, wherein at the time of the workpiece detachably engaged with the distal end of the shaft member of the driving unit nail Rotation of the outward timber is suppressed, the at the time of the workpiece fixed engagement with the shaft member of the drive unit is released, may be configured to rotate outwardly by being pressed by the cover member. Accordingly, the workpiece can be fixed to the jig with a simple mechanism.
[0011]
Further, in a preferred embodiment of the jig according to the present invention, when the workpiece is fixed, first, the collet chuck of the first fixing tool is connected to the workpiece fixing base and the workpiece as the shaft member is lowered. When the work piece is fitted to the work piece to fix the work piece on its outer surface and the shaft member is further lowered, the claw member of the second fixture is rotated outwardly, and the hollow part of the work piece It is good also as fixing the said workpiece on the inner surface by pinching the end surface . Accordingly, the workpiece can be fixed to the jig on the outer surface and inner surface of the workpiece in one operation, and the workpiece can be attached and detached efficiently.
[0012]
In a preferred embodiment of the jig according to the present invention, a substantially cylindrical protective member may be provided between the claw member and the inner surface of the workpiece. Thereby, it is possible to prevent chips and the like generated during machining of the workpiece from entering the jig from the place where the claw member enters and exits.
[0013]
In a preferred embodiment of the jig according to the present invention, the second fixing tool is a cylindrical fixing member that is fitted into the workpiece and fixes the workpiece, and the fixing member. A fixing body that is inserted into an inner peripheral portion; and a rotary shaft member that is integrally and rotatably supported on the inner side of the fixing body. A screw thread and a spline are provided below the rotary shaft member. Provided side by side, the workpiece positioning and fixing device main body has a screw thread that engages with the screw thread of the rotary shaft member at the upper part of the device, and the screw member of the drive unit rotates above the screw member. A spline hole meshing with the spline of the shaft member, and when fixing the workpiece, the fixing member and the second fixing tool are inserted into the workpiece, and the spline hole of the rotary shaft member and the spline hole of the screw member; The rotation axis The screw thread of the material is engaged with the screw thread of the fixing device main body, and the rotating shaft member is rotated to lower the shaft member so that the collet chuck of the first fixture is the workpiece fixing base. And the workpiece are fixed to the outer surface of the workpiece, and then the annular fixing member is pressed downward by the fixture main body so that the workpiece is hollow. It is good also as fixing with the end surface of a part . With such a configuration, it is possible to reliably fix the workpiece to the jig with a simpler mechanism.
[0014]
In a preferred embodiment of the jig according to the present invention, the shaft member of the driving unit is in contact with the lower end of the rotating shaft member of the second fixture, and detects the amount of movement of the rotating shaft member . Detection means may be provided. As a result, the workpiece can be fixed to the jig with an appropriate fastening force, and it is possible to prevent the workpiece from being damaged due to excessive fastening or the occurrence of rattling due to insufficient fastening force.
[0015]
In a preferred embodiment of the jig according to the present invention, at least one workpiece support device and a workpiece positioning device are further provided on the outer periphery of the workpiece fixing table on the base plate, and the workpiece fixing table is also provided. In addition, an oil passage for the operation of the workpiece support device and the positioning device may be provided. As a result, the workpiece can be reliably fixed and supported during conveyance and machining of the workpiece.
[0016]
Furthermore, in a preferred embodiment of the jig according to the present invention, an auxiliary collet chuck that is detachably fitted to the inner periphery of the collet chuck may be provided. Thereby, it becomes possible to easily cope with a plurality of types of workpieces having different inner diameters.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0018]
1 and 2 are a plan view and a side view showing an embodiment of a jig according to the present invention. In the figure, in order to process and convey a pair of symmetrical parts, here, a knuckle steering of an automobile, jigs 1 and 1 'are arranged on a single pallet (not shown). The jigs 1, 1 ′ each include a base plate 2, 2 ′, a fixing base 3, 3 ′, a fixing device 4, 4 ′ provided through the center of the fixing base 3, 3 ′, 5 'is fixed on the fixing bases 3 and 3' by passing the fixing devices 4 and 4 'through the central hole. Further, a support device 6 and positioning devices 7 and 7 'for supporting the workpieces 5 and 5' are provided on the fixed bases 3 and 3 '. In the illustrated jig 1, 1 ′, the support device 6 and the positioning devices 7, 7 ′ are operated by hydraulic pressure, and the support device 6 and the positioning devices 7, 7 ′ are connected to the fixed bases 3, 3 ′. The hydraulic coupler 8 for connecting to a hydraulic device (not shown) is provided to operate each of the two.
[0019]
FIG. 3 is a cross-sectional view showing only the jig 1. In this figure, the left half of the center line XX shows a state where the workpiece 5 is not fixed, and the right half shows a state where the workpiece 5 is fixed. The fixing device 4 for the jig 1 has a base 4a fixed to the fixing base 3 by bolting. The fixing device 4 includes a clutch 9 therein, and the clutch 9 is rotatably supported on the fixing device 4 by a radial bearing 10 and a thrust bearing 11. The lower part of the clutch 9 is screwed with the rod 12, and the rod 12 moves up and down as the clutch 9 rotates. On the outside of the rod 12, a hollow shaft 13 is provided so as to slide on the inner surface of the fixing device 4 and the outer surface of the rod 12, respectively. The rod 12 is provided with a groove 12a and engages with a protrusion 13a provided on the hollow shaft 13. Further, a stopper collar 13b is provided at the lower end of the hollow shaft 13, and abuts against the stepped portion 12d of the rod 12. Accordingly, as the rod 12 is raised and lowered, the hollow shaft 13 is also raised and lowered by a predetermined distance. Above the hollow shaft 13, a three-claw clamper 14 is supported by the fixing device 4 so as to be rotatable outwardly by a shaft 14a. The three-claw clamper 14 is in contact with the distal end portion of the hollow shaft 13 and is engaged with the distal end portion 12b of the rod 12, thereby suppressing outward rotation. The three-claw clamper 14 is pressed by a cap 15 biased by a compression spring 16.
[0020]
A collet chuck 17 is provided between the fixing device 4 and the inner periphery of the fixing base 3. The collet chuck 17 is supported by a support rod 18 that passes through a through hole 4 b provided in the base portion 4 a of the fixing device 4 and a base portion 19 to which the support rod 18 is attached, and is urged by a compression spring 20. Further, the lower portion of the base portion 19 engages with a ring 12c provided at the lower portion of the rod 12, and can be moved up and down as the rod 12 moves up and down.
[0021]
Hereinafter, a procedure for fixing the workpiece 5 by the jig 1 according to the present invention will be described with reference to FIGS. First, the workpiece 5 is placed on the fixture 3 so as to pass through the hollow portion 5a of the workpiece 5 so as to be horizontally supported by the seat ring 3a (see FIGS. 2 and 3) and positioned. Positioning on the jig 1 is performed by the device 7 (see FIG. 1). Next, when the clutch 8 is rotated counterclockwise, the rod 12 is lowered. As the rod 12 is lowered, the base 19 of the collet chuck 17 engaged with the ring 12c is lowered together with the elastic force of the spring 20. Therefore, the collet chuck 17 is fitted between the fixing device 3 and the outer surface 5b of the workpiece 5. As a result, the workpiece 5 is fixed to the jig 1 on its outer surface.
[0022]
When the clutch 8 is further rotated in the same direction, the hollow shaft 13 is also lowered as the rod 12 is lowered. This is because, as described above, since the upper end portion of the stopper collar 13b at the lower end portion of the hollow shaft 13 is in contact with the stepped portion 12d of the rod 12, the hollow shaft 13 is also lowered together with the rod 12. When the rod 11 is lowered, the distal end portion 12b and the three-claw clamper 14 are disengaged and pressed by the cap 15 biased by the spring 16, so that the three-claw clamper 14 is fixed to the shaft 14a. Rotate 4 outward. As a result, the tip of the three-claw clamper 14 comes into contact with the inner peripheral portion 5c of the workpiece 5, and the inner peripheral portion 5c is locked . As a result, the workpiece 5 is fixed to the jig 1 also on the inner surface. Finally, the workpiece 5 is firmly fixed to the jig 1 by supporting the workpiece with the support device 6. In addition, by comprising in this way, the fastening force for fixing the workpiece 5 by the three-claw clamper 14 can be varied, that is, arbitrarily set so that the user can surely fix according to the workpiece. Will be able to.
[0023]
On the other hand, when removing the workpiece 5 from the jig, the clutch 9 is rotated clockwise to raise the rod 12 to fold the three-claw clamper 14 and then raise the collet chuck 17 to raise the workpiece 5. Is released from the fixing device 4.
[0024]
FIG. 4 shows a modification of the configuration of the jig shown in FIG. In the jig 1 shown in FIG. 4, a protective ring 21 is inserted between the fixing device 4 and the workpiece 5. The protective ring 21 plays a role of preventing cutting chips and the like from entering the fixing device 4 through the opening 4b through which the three-claw clamper 14 of the fixing device 4 enters and exits when the workpiece 5 is processed. It is. The protection ring 21 may be fixed to the fixing device 4 by a fixing means (not shown) (not shown).
[0025]
FIG. 5 shows another example of the jig according to the present invention. The illustrated jig 40 includes a fixing device 43 attached to a fixing base 42 on a base plate 41. Here, a state in which a workpiece 44 is fixed to the jig 40 by the present device 43 is shown. The fixing device 43 includes a base 45, a clamper 46, and a clamp ring 47. The base portion 45 includes a sleeve portion 45a and a nut portion 45b, both of which are fastened to each other by a bolt 45c, and the sleeve portion 45a is fixed to the intermediate portion 42b of the fixing base 42 by a bolt 45d. The clamper 46 includes a housing 46a and a cover 46b, both of which are fastened to each other by a bolt 46c. Further, a hole 47a is provided on the side surface of the clamp ring 47, and when the workpiece 44 is attached or detached, the attaching / detaching chuck (not shown) is engaged with the hole 47a. The clamper 46 and the clamp ring 47 are connected by a pin 47b.
[0026]
A clamp bolt 48 is provided inside the clamper 46, is rotatably supported by the clamper 46 by a radial bearing 49 and a thrust bearing 50, and penetrates the clamper 46 and projects downward. The protruding portion is provided with a screw thread 48a that meshes with the screw hole 45e of the base 45 and a spline 48b arranged vertically below the screw thread 48a. These actions will be described later.
[0027]
The outer diameter of the clamp ring 47 is such that the outer peripheral surface of the clamp ring 47 is in close contact with the inner peripheral portion 44a of the workpiece 44, and the inner diameter is such that the inner peripheral surface of the clamp ring 47 is in close contact with the clamper 46. Have In this way, the workpiece 44 can be correctly fixed to the jig 40. In particular, by providing a plurality of clamp rings 47 having different outer diameters, it is possible to deal with workpieces 44 having different inner peripheral diameters.
[0028]
A nut 51 and a hollow shaft 52 are accommodated in the base 45, and the nut 51 can be rotated by radial bearings 53 and 54 and thrust bearings 55 and 56. A spline hole 51a is provided in the upper part of the nut 51, and the spline hole 51a meshes with the spline 48b of the clamp bolt 48. A screw hole 51b is provided at the lower part of the nut 51 and meshes with a screw thread 52a provided at the upper part of the hollow shaft 52. Both the screw hole 51b and the screw thread 52a are left-handed screws. Further, a groove 52b and a stopper collar 52c are provided below the hollow shaft 52, and the operation thereof will be described later. Further, a detection bar 57 is provided in the hollow shaft 52 so as to penetrate the hollow shaft 52. A spring 58 is inserted between the cap 57a of the detection bar 57 and the hollow shaft 52, and the cap 57a and the lower end portion 48c of the clamp bolt 48 serve to clamp the clamp bolt shaft when the workpiece 44 is clamped as will be described later. When 48 descends a predetermined distance, they come into contact with each other. The operation of the detection bar 57 will be described later.
[0029]
A plate 59, a stopper ring 60 and a stopper plate 61 are provided under the base 44 of the fixing device 43. The plate 59 and the stopper ring 60 are fixed to the base 45 by fixing means (bolts or the like) not shown. To do. A hollow shaft 52 passes through the center of the plate 59 and the stopper plate 61. A compression spring 62 is inserted between the plate 59 and the stopper plate 61. Further, collars 63, 64, 65 are provided between the plate 59 and the nut 51, between the thrust bearing 54 and the radial bearing 56, and between the thrust bearing 53 and the radial bearing 55, respectively. Supports 45 inside. The stopper plate 61 is provided with a detent 61a and is engaged with the groove 52b of the hollow shaft 52. As a result, the hollow shaft 52 does not rotate when it is raised or lowered. In the state where the workpiece 44 is not fixed to the jig 40, although not shown, the lower surface of the stopper plate 61 and the stopper collar 52c of the hollow shaft 52 described above are in contact with each other, whereby the spring 62 The lowering of the stopper plate 61 is suppressed against this force.
[0030]
A collet chuck 66 is provided between the inner periphery of the fixing base 42 and the fixing device 43. The collet chuck 66 is supported by a support rod 67. One end of the support rod 67 is fastened to the collet chuck 66 by a bolt 68 and penetrates the base 45, the plate 59 and the stopper ring 60 of the fixing device 43, and the other end. Is fastened to the stopper plate 61 with bolts 69. With such a configuration, the collet chuck 66 is biased by the spring 62 provided between the plate 59 and the stopper plate 61.
[0031]
In the example of FIG. 5, an auxiliary collet chuck 70 is further fitted on the inner periphery of the collet chuck 66. The auxiliary collet chuck 70 is attached to the collet chuck 66 by engagement between a dull hole 70a provided on the bottom surface thereof and a pin 71 provided on the inner bottom surface of the collet chuck 66. The outer diameter of the auxiliary collet chuck 70 is the collet chuck 70. It has a size that fits closely with the inner circumference of 66. The auxiliary collet chuck 70 is used when the diameter of the outer peripheral surface 44b of the workpiece 44 is smaller than the inner diameter of the collet chuck 66. By attaching the auxiliary collet chuck 70 having various inner diameters to the collet chuck 66, It becomes possible to deal with workpieces 44 having different sizes (diameter of the outer peripheral surface 44b).
[0032]
Next, a procedure for fixing the workpiece 44 with the jig 40 will be described with reference to FIG. First, the fixing device 43 is passed through the hollow portion of the work piece 44, and the work piece 44 is placed so as to be horizontally supported by the seat ring 42c on the work table 42, and positioned on the jig 40 by a positioning device (not shown). I do. This positioning device is the same as the positioning device 7 shown in FIG. 1, for example. Next, the clamper 46 with the clamp ring 47 is attached so that the clamp bolt 48 passes through the screw hole 45e of the base 45 of the fixing device 43 and the spline 48b of the clamp bolt 48 is engaged with the spline hole 51a of the nut 51. And place it on the stepped portion 44c on the inner periphery of the workpiece 44. At this time, the movement of the clamper 46 (and the clamp ring 47) onto the workpiece 44 is performed by engaging a chuck provided on a conveying device (not shown) and a hole 47a of the clamp ring 47.
[0033]
Next, when the clamp bolt 48 is rotated in the fastening direction (right rotation direction) by a nut runner or the like (not shown), the nut 51 is rotated by meshing between the spline 48b of the clamp bolt 48 and the spline hole 51a of the nut 51, and thereby the nut. The hollow shaft 52 engaged with the screw hole 51b of the 51 and the screw thread 52a is lowered. Here, since the groove 52b at the lower part of the hollow shaft 52 is engaged with the rotation stopper 61a provided on the stopper plate 61, the hollow shaft 52 descends without rotating itself even when the nut 51 rotates. At the same time, the clamping bolt 48 itself is lowered due to the engagement between the screw hole 45e of the base portion 45 and the thread 48a.
[0034]
As the hollow shaft 52 is lowered, the stopper plate 61 is also lowered by the force of the spring 62, and at the same time, the collet chuck 66 connected thereto is lowered by the stopper plate 61 and the support rod 67. Therefore, the collet chuck 66 (and the auxiliary collet chuck 70) is fitted between the fixing device 43 and the outer peripheral surface 44b of the workpiece 44. As a result, the workpiece 44 is fixed to the jig 40 at the outer peripheral surface thereof. The collet chuck 66 is restrained from lowering when the stopper plate 61 abuts on the stepped portion 41a inside the base plate 41. In other words, the position of the stepped portion 41a is the lower limit of the collet chuck 66. Thereby, it is possible to prevent the workpiece 44 from being excessively tightened on the collet chuck 66 and being damaged.
[0035]
When the clamp bolt 48 is further rotated, the clamper 46 (and the clamp ring 47) is lowered as the clamp bolt 48 is lowered due to the engagement between the thread 48a of the clamp bolt 48 and the screw hole 45e of the base 45, and the workpiece 44 is lowered. Is pressed against the fixed base 42. When the clamper 46 is lowered by a predetermined distance, the workpiece 44 is fixed to the jig 40 also on the inner peripheral surface thereof.
[0036]
Here, whether or not the clamper 46 is lowered by a sufficient distance to fix the workpiece 44 is detected as follows. First, as described above, when the clamper 46 is placed on the workpiece 44 and the clamp bolt 48 is rotated, the clamp bolt 48 is engaged with the thread 48a of the clamp bolt 48 and the screw hole 45e of the base 45 of the fixing device 43. Himself descends. When the clamp bolt 48 is lowered by a predetermined distance, its lower end 48c comes into contact with the cap 57a at the upper end of the detection bar 57. When the clamp bolt 48 is further lowered, the detection bar 57 is also lowered. Here, the distance by which the clamp bar 48 is lowered can be known by measuring the distance by which the detection bar 57 is lowered by a measuring means (for example, a position sensor) (not shown). By detecting this distance, it is possible to know whether or not the work piece 44 is fixed by the clamper 46 with an appropriate fastening force and whether or not the work piece 44 has been removed.
[0037]
Here, the distance that the clamp bolt 48 is moved (raised or lowered) can also be detected by the lowered distance of the hollow shaft 52, but the movement of the hollow shaft 52 accompanying the movement of the clamp bolt 48 is the nut 51. Therefore, the amount of movement of the clamp bolt 48 is not directly detected. Therefore, by providing the detection bar 57, it is possible to detect an accurate amount of movement of the clamp bolt 48.
[0038]
Although the present invention has been described above with reference to the illustrated example, the present invention is not limited to this. For example, in the jig shown in FIG. 3, the three-claw clamper 14 and the collet chuck 17 are operated by a hydraulic cylinder. It is good as a thing.
[Brief description of the drawings]
FIG. 1 is a plan view of a workpiece positioning / fixing jig according to the present invention.
FIG. 2 is a side view of a jig according to the present invention.
FIG. 3 is a cross-sectional view showing only the fixing base and the fixing device of the jig according to the present invention.
4 is a cross-sectional view showing a state in which a protective ring is fitted between the jig fixing device of FIG. 3 and a workpiece.
FIG. 5 is a cross-sectional view showing another example of a jig according to the present invention.
FIG. 6 is a cross-sectional view showing an example of a conventional workpiece fixing jig.
[Explanation of symbols]
1, 1 ', 30, 40 Jig 2, 2', 31, 41 Base plate 3, 3 ', 32, 42 Workpiece fixing base 4,43 Workpiece fixing device 5, 5', 41, 44 Workpiece 6 Workpiece Object support device 7 Workpiece positioning device 8 Hydraulic coupler 9 Clutch
10, 49, 53, 54 Radial bearing
11, 50, 55, 56 Thrust bearing
12 rods
13, 52 Hollow shaft
14, 38 3-claw clamper
15, 40 cap
16, 20, 39, 58, 62 Spring
17, 66 Collet chuck
18, 67 Collet chuck support rod
19 Collet chuck base
21 Protective ring
33 Seat ring
34 cylinders
35 Cylinder rod
36 axes
37 Workpiece fixture
45 Base of fixing device 43
46 Clamper
47 Clamp ring
48 Clamp bolt
51 nut
57 Detection bar
59 plates
60 Stopper ring
61 Stopper plate
63, 64, 65 colors
68, 69 volts
70 Auxiliary collet chuck
71 Auxiliary collet chuck fixing pin

Claims (12)

A jig for positioning and fixing the workpiece for processing or conveying the workpiece having a hollow portion ,
A base plate;
A workpiece fixing base provided on the base plate;
A workpiece positioning and fixing device provided at the center of the workpiece fixing base,
The workpiece positioning and fixing device is inserted into the hollow portion of the workpiece and clamped and fixed by clamping the end surface of the hollow portion and a first fixture for clamping and fixing the outer surface of the workpiece. A jig for positioning and fixing a workpiece, comprising: a second fixing tool; and a drive unit for operating the first and second fixing tools. The jig according to claim 1, wherein
A jig for positioning and fixing a workpiece, wherein the drive unit includes a screw member and a shaft member screwed up and down with the screw member . The jig according to claim 1, wherein
A jig for positioning and fixing a workpiece, wherein the driving unit includes a hydraulic cylinder and a shaft member that moves up and down in connection with the hydraulic cylinder . In the jig according to any one of claims 1 to 3,
The first fixture is fitted between the workpiece and the workpiece fixing base to fix the workpiece, and a collet chuck having a tapered outer peripheral surface is integrated with the collet chuck. Positioning and fixing a workpiece, comprising: a support member that supports the collet chuck and that moves up and down by engaging with a shaft member of the drive unit; and an elastic member that elastically supports the support member. Jig. The jig according to claim 4, wherein
A claw member supported by the fixture so as to be able to rotate outwardly, the second fixture holding the end surface of the hollow portion of the workpiece and fixing the workpiece; A second shaft member provided on the outer periphery of the shaft member so as to be engaged and slidable with the shaft member; and a lid member for biasing the claw member by a second elastic member;
The claw member engages with the tip end portion of the shaft member of the drive unit when the workpiece is attached and detached, and the rotation of the claw member to the outside is suppressed, and the shaft member of the drive unit is fixed when the workpiece is fixed. A jig for positioning and fixing a workpiece, wherein the jig is rotated outward by being pressed by the lid member. The jig according to claim 5, wherein
When the workpiece is fixed, the collet chuck of the first fixture is first fitted between the workpiece fixing base and the workpiece as the shaft member is lowered, and the workpiece is moved to the workpiece. When the shaft member is fixed on the outer surface and the shaft member is further lowered, the claw member of the second fixing tool rotates outward to pinch the end surface of the hollow portion of the workpiece, thereby fixing the workpiece on the inner surface. A jig for positioning and fixing a workpiece, characterized in that: In the jig according to any one of claims 1 to 6,
A jig for positioning and fixing a workpiece, wherein a cylindrical protective member is provided between the claw member and the inner surface of the workpiece. The jig according to claim 4, wherein
A cylindrical fixing member for fixing the workpiece by inserting the second fixing tool into the workpiece, a fixing body inserted into an inner peripheral portion of the fixing member, and the fixing tool A rotating shaft member that is integrally and rotatably supported with the fixture main body inside the main body,
A thread and a spline are arranged vertically below the rotary shaft member,
The workpiece positioning and fixing device main body includes a screw thread that engages with a screw thread of the rotary shaft member at the upper part of the device,
The screw member of the drive unit has a spline hole that meshes with the spline of the rotary shaft member at the top of the screw member;
When fixing the workpiece, the fixing member and the second fixture are inserted into the workpiece, and the spline of the rotating shaft member, the spline hole of the screw member, the thread of the rotating shaft member, and the fixing device Engage the thread of the main body respectively,
The shaft member is lowered by rotating the rotating shaft member, and the collet chuck of the first fixture is fitted between the workpiece fixing base and the workpiece, and the workpiece is moved to the workpiece. And fixing the work piece at the end face of the hollow portion of the work piece by pressing the annular fixing member downward by the fixture body and fixing the work piece at the end face of the hollow part of the work piece. jig. The jig according to claim 8, wherein
The shaft member of the driving unit is provided with a detecting means for contacting the lower end of the rotating shaft member of the second fixture and detecting the amount of movement of the rotating shaft member . Positioning fixture. In the jig according to any one of claims 1 to 9,
A workpiece positioning / fixing jig, further comprising at least one workpiece support device and a workpiece positioning device on an outer periphery of the workpiece fixing table on the base plate. The jig according to claim 10 , wherein
A jig for positioning and fixing a workpiece, wherein an oil passage for the operation of the workpiece support device and the positioning device is provided on the workpiece fixing base. In the jig according to any one of claims 4 to 11 ,
A jig for positioning and fixing a workpiece, comprising an auxiliary collet chuck that is detachably fitted to the inner periphery of the collet chuck.

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