Chucking positioning jig

Abstract

To provide a chucking positioning jig which can hold a circular plate-shaped work-piece without damaging and distorting the same, and can perform high-accuracy positioning and precise processing thereof.SOLUTION: A chucking positioning jig 10 detachably holds and positions a circular plate-shaped work-piece 90. The chucking positioning jig 10 comprises: an upper stage plate 20 in which an inclined guide hole 22 on which the work-piece 90 is placed and which inclines outward from a central axis of the work-piece 90, is formed; a positioning pin 70 which is so provided on the upper stage plate 20 as to project upward and guides an outer peripheral surface part 94 of the work-piece 90; and a chuck member 50 which is movably provided in the inclined guide hole 22 of the upper stage plate 20, descends obliquely, and presses the work-piece 90 from above and holds the same.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a chucking and positioning jig that detachably holds and positions a disk-shaped workpiece. [Background technology]

[0002] In general, when machining a disk-shaped workpiece, the outer periphery or top surface of the disk-shaped workpiece is positioned and held by a jig or the like, and the held workpiece is subjected to drilling or other processing using a drill or the like. Some workpieces must not be scratched or bent except for the part being machined, so the jig also requires some ingenuity. As a jig for positioning and holding such a disk-shaped workpiece, the technology described in Patent Document 1 is known.

[0003] The chuck mechanism of Patent Document 1 includes a cam plate and a guide body arranged coaxially with the cam plate. Four fixing jigs are mounted on the guide body. The fixing jigs have claws that face outward from the center of the guide body. By rotating the cam plate with a lever, the claws are moved toward the center of the guide body against the biasing force of the spring member S, and the chuck is placed in a standby state. When a disk-shaped workpiece is chucked by the claws, the tapered surface on the inside of the lower tip surface of the claws is brought into contact with the chamfered portion on the periphery of the circular central opening of the workpiece.

[0004] The tapered surface of the claw is pressed into the chamfered portion of the workpiece, so that the workpiece is held down so that it does not float up. At this time, the tapered surface of the claw does not come into contact with the already machined part of the workpiece, so that the workpiece is not damaged.

[0005] Incidentally, in the case of precision resin parts and the like, depending on the workpiece, it may be impossible to scratch the entire surface even in areas other than the processed area.

[0006] However, in the chuck mechanism of Patent Document 1, the claws having tapered surfaces move laterally and are pressed into the chamfered portion of the workpiece, causing the chamfered portion of the workpiece to be rubbed and damaged. In addition, for a disk-shaped workpiece with a hole in the center, the four claws in a closed state like a center spindle are inserted into the hole of the workpiece and then opened to expand in the lateral direction (horizontal direction), and the workpiece is finally positioned with the tapered surfaces in contact, making it impossible to accurately position the workpiece. Furthermore, since the workpiece is held down by the claws moving laterally, the workpiece is subjected to a force in the lateral direction and is machined in a laterally distorted state, making it impossible to perform precision machining if the workpiece is a precision part. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2009-12081 A Summary of the Invention [Problem to be solved by the invention]

[0008] In view of the above, an object of the present invention is to provide a chucking positioning jig that can hold a disk-shaped workpiece without damaging or distorting it, and that can position it with high accuracy so as to perform precision machining. [Means for solving the problem]

[0009] According to an embodiment of the present invention, there is provided a chucking and positioning jig for detachably holding and positioning a disk-shaped workpiece, comprising: The workpiece is placed on an upper plate having an inclined guide hole that is inclined outward from the central axis of the workpiece, a positioning pin that protrudes upward from the upper plate and guides the outer peripheral surface of the workpiece, and a chuck member that is movably mounted in the inclined guide hole of the upper plate and descends obliquely to press and hold the workpiece from above.

[0010] According to this configuration, the chucking positioning jig is provided with a positioning pin that protrudes upward from the upper plate and guides the outer peripheral surface of the workpiece, and a chuck member that is movably mounted in the inclined guide hole of the upper plate and descends obliquely to press and hold the workpiece from above. Since the positioning and chucking (holding) of the workpiece are performed by separate members, each function can be performed with high quality.

[0011] Specifically, since the positioning pins only have the function of guiding the outer peripheral surface of the workpiece, unlike the conventional technology in which the upper surface (chamfered portion) of the disc-shaped workpiece is pressed from above with a tapered surface, the present invention can perform positioning in the lateral direction (XY plane in general coordinates) with high accuracy by guiding the outer peripheral surface of the disc-shaped workpiece. In addition, since the chuck member is provided movably in the inclined guide hole of the upper plate and descends obliquely to press and hold the workpiece from above, unlike the conventional technology in which a claw portion having a tapered surface is moved laterally to push it into the chamfered portion of the workpiece, the present invention presses the upper surface of the positioned disc-shaped workpiece, so the disc-shaped workpiece can be held without being damaged or distorted, and since the workpiece is not distorted, subsequent processing can also be performed with high accuracy.

[0012] Furthermore, when setting or removing a workpiece, the chuck member opens outward in plan view and retreats along the inclined guide hole in the upper plate, so that the chuck member does not get in the way and the workpiece can be easily set and removed. In this way, the chucking positioning jig of the present invention can hold a disk-shaped workpiece without damaging or distorting it, and can position it with high accuracy for precision machining.

[0013] Preferably, the positioning pin has a cylindrical main body portion that contacts the outer peripheral surface of the workpiece placed on it, a first tapered portion that is connected to an upper end of the main body portion and narrows in diameter upward, and a second tapered portion that is connected to an upper end of the first tapered portion and has a taper angle larger than the taper angle of the first tapered portion.

[0014] With this configuration, the positioning pin can easily catch and guide even a workpiece that has entered a significantly misaligned position when being set, due to the second taper section, which has a taper angle larger than the taper angle of the first taper section, and the first taper section, which is connected to the upper end of the main body and narrows in diameter toward the upward direction, allows the workpiece to be positioned in an almost accurate position, and the cylindrical shape of the main body section enables the main body section to be in contact with the outer peripheral surface of the workpiece in parallel, allowing positioning with even greater precision.

[0015] Preferably, a pin hole is formed downward on the upper surface of the upper plate at a position surrounding the placed workpiece, The positioning pin is provided in the pin hole so as to be movable up and down, and a base end of the positioning pin is supported by an elastic member that is provided at the bottom of the pin hole and expands and contracts up and down.

[0016] According to this configuration, the positioning pins are provided in the pin holes so as to be movable in the vertical direction, and the base ends of the positioning pins are supported by an elastic member provided at the bottom of the pin holes and expands and contracts in the vertical direction. As a result, there is no gap between the workpiece and the multiple positioning pins arranged in positions surrounding the workpiece, so even if the workpiece is guided at an angle and becomes jammed between the positioning pins, the positioning pins supported by the elastic member can move up and down to eliminate the jamming of the workpiece and smoothly guide the workpiece to the top surface of the upper plate. As a result, the workpiece can be positioned with higher accuracy.

[0017] Preferably, the chuck member includes a sliding portion that slides along the inclined guide hole, a claw portion provided at the upper end of the sliding portion and extending toward the central axis of the workpiece to abut against the upper surface of the workpiece, a tapered portion provided on the claw portion and narrowing in width toward the tip, and a notch provided in the center of the tapered portion.

[0018] According to this configuration, the chuck member has a sliding portion that slides in the inclined guide hole, and a claw portion that is provided at the upper end of the sliding portion and extends toward the central axis of the workpiece to abut against the upper surface of the workpiece, so that when a disk-shaped workpiece is chucked, the claw portion abuts only on the upper surface of the workpiece without contacting the outer circumferential surface of the workpiece, and the workpiece can be held without being damaged or distorted. Furthermore, the claw portion has a tapered portion whose width decreases toward the tip and a notch provided in the center of the tapered portion, so that the force when holding the workpiece is distributed, and the workpiece can be held with less load.

[0019] Preferably, the chuck member is provided with a step portion provided at the lower end of the sliding portion and having a pin through hole formed therein, and is arranged in a plurality of directions radially with respect to the central axis of the workpiece placed thereon in a plan view, The step portion is connected to a link member that raises and lowers the chuck members collectively, the link member includes a central portion serving as a main body, a plurality of arm portions extending radially from the central portion and each arm portion has a long hole having a long diameter in a lateral direction at its tip portion, and a support pin that is provided movably in a long diameter direction of the long hole and is inserted into the pin through hole, A cylinder for raising and lowering the link member is connected to the central portion.

[0020] According to this configuration, the chuck members are arranged in multiple directions radially with respect to the central axis of the placed workpiece in a plan view, so that the workpiece is held by distributing the force with the multiple chuck members, and the workpiece can be held with less load. Furthermore, the link member connects the multiple chuck members to the multiple arm portions extending radially from the center, and the multiple chuck members are raised and lowered collectively by one link member, so that even if the chucking mechanism uses multiple chuck members, the number of parts is reduced and the space is small. Furthermore, since a long hole with a long diameter in the horizontal direction is formed at the tip portion of the arm portion, when the chuck member holds the workpiece, even if the chuck member descends obliquely along the inclined guide hole and the support pin attached to the step portion located at the bottom of the chuck member moves laterally, the long hole can absorb the lateral movement of the support pin. Therefore, no extra link member is required to absorb the lateral movement of the support pin, and the chucking mechanism can be made with fewer parts and in a small space. The positioning jig itself can be made compact.

[0021] Preferably, a middle plate having a hollow portion formed therein as a space for the link member to rise and fall is provided below the upper plate, and a lower plate supporting the cylinder is provided below the middle plate.

[0022] With this configuration, a hollow portion is formed in the middle plate to serve as a space for the link member to ascend and descend, and the link member is stored in this hollow portion, so that even if the positioning jig is placed inside the processing machine, the link member can be protected from chips from the workpiece when the workpiece is processed, allowing the chucking of the positioning jig to function normally and always enabling high-precision processing. Furthermore, assembly is easy since it is only necessary to place the middle and lower plates under the upper plate. Effect of the Invention

[0023] The chucking and positioning jig of the present invention can hold a disk-shaped workpiece without damaging or distorting it, and can position it with high accuracy for precision machining. [Brief description of the drawings]

[0024] [Figure 1] Fig. 1(A) is a perspective view of a chucking positioning jig according to an embodiment of the present invention, and Fig. 1(B) is a cross-sectional view of the chucking positioning jig according to the embodiment. [Diagram 2] Fig. 2(A) is a plan view of the workpiece, and Fig. 2(B) is a side view of the workpiece. [Diagram 3] FIG. 2 is a cross-sectional view of a chucking positioning jig according to an embodiment arranged in a processing machine. [Figure 4] FIG. 2 is a plan view showing a base and a support member according to the embodiment. [Diagram 5] FIG. 4 is a plan view of a lower plate according to the embodiment. [Figure 6] FIG. 4 is a plan view of a middle plate according to the embodiment. [Figure 7] Fig. 7(A) is a plan view of an upper plate according to the embodiment, Fig. 7(B) is a cross-sectional view taken along line II-II in (A), and Fig. 7(C) is a cross-sectional view taken along line II in (A). [Figure 8] Fig. 8(A) is a front view of the chuck member according to the embodiment, Fig. 8(B) is a right side view of the chuck member according to the embodiment, and Fig. 8(C) is a plan view of the chuck member according to the embodiment. [Figure 9] Fig. 9(A) is a plan view of a link member according to an embodiment, Fig. 9(B) is a cross-sectional view taken along line III-III in Fig. 9(A), and Fig. 7(C) is a front view of a support pin according to an embodiment. [Figure 10] FIG. 4 is a front view of the positioning pin according to the embodiment. [Figure 11] 6A to 6C are diagrams illustrating the positioning operation of the chucking positioning jig according to the embodiment. [Figure 12] 12(A) to 12(C) are operational diagrams of chucking and workpiece machining by the chucking positioning jig according to the comparative example, and Fig. 12(D) to 12(E) are operational diagrams of chucking and workpiece machining by the chucking positioning jig according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The drawings include conceptual (schematic) drawings. EXAMPLES

[0026] An example of a workpiece 90 used with the chucking positioning jig 10 according to the embodiment of the present invention will be described. 2, the workpiece 90 has a disk shape and is made of synthetic resin. The workpiece 90 has a flat, perfectly circular upper surface portion 92, a flat lower surface portion 93 arranged parallel to the upper surface portion 92, an outer peripheral surface portion 94 connected at a right angle to the upper surface portion 92, and a chamfered portion 95 connecting the outer peripheral surface portion 94 and the lower surface portion 93. A through hole 91 is formed which penetrates from the upper surface portion 92 to the lower surface portion 93.

[0027] The diameter of the workpiece 90 is D1, the height of the outer peripheral surface portion 94 is L1, the dimension of the chamfered portion 95 is C1, and the diameter of the through hole 91 is d1. Note that the workpiece 90 is an example, and in the embodiment, the workpiece 90 is made of synthetic resin, but is not limited to this, and may be made of other materials such as metal or wood. Also, the shape and dimensions are an example, and the chamfered portion 95 may not be present, and any shape is possible as long as it is approximately disk-shaped.

[0028] Next, a chucking positioning jig 10 according to an embodiment of the invention will be described. 1 to 7, the chucking positioning jig 10 is a jig that detachably holds and positions a disk-shaped workpiece 90. The chucking positioning jig 10 includes an upper plate 20 on which the workpiece 90 is placed and in which an inclined guide hole 22 is formed that is inclined outwardly and upwardly from the central axis of the workpiece 90, a positioning pin 70 that is provided on the upper plate 20 and protrudes upward to guide an outer peripheral surface portion 94 of the workpiece 90, and a chuck member 50 that is movably provided in the inclined guide hole 22 of the upper plate 20 and descends obliquely to press and hold the workpiece 90 from above.

[0029] Further, a middle plate 30 is provided below the upper plate 20, in which a hollow portion 31 is formed to serve as a space for the link member 60 to rise and fall, a lower plate 40 is provided below the middle plate 30, which supports the cylinder 11, a support member 15 is provided below the lower plate 40, and a base 16 is provided below the support member 15. The upper plate 20, the middle plate 30 and the lower plate 40 are fastened together by inserting plate fastening members 13 through fixing holes 23 formed in an upper surface 21 of the upper plate 20.

[0030] Next, the support member 15 and the base 16 will be described. 3 and 4, the base 16 has a rectangular shape in a plan view, and support members 15 are provided at opposing ends of the base 16, and a plurality of cylinders 11 are provided on the support members 15, and the cylinders 11 are provided with joints 11. The base 16 is installed, for example, in a machine tool, and an air hose for supplying so-called air used in a factory is connected to the joints 11. Furthermore, the support members 15 and the base 16 are formed with holes for fastening various members.

[0031] Next, the lower plate 40 will be described. As shown in Figures 1 and 5, the lower plate 40 has a rectangular shape when viewed in a plane, and is formed with a plurality of cylinder through holes 41 for inserting the pistons 12 of the cylinders 11, receiving portions 42 for receiving the cylinders 11, and pin holes 43 for inserting the positioning pins 70.

[0032] Next, the middle plate 30 will be described. As shown in Figures 1 and 6, the middle plate 30 has a rectangular shape when viewed in a plane, and is formed with a hollow portion 31 having arm grooves 31a extending in three directions from any central portion when viewed in a plane, a plurality of pin holes 32 for inserting positioning pins 70, and a plurality of oil holes 33 for refilling oil.

[0033] Next, the upper plate 12 will be described. 1 and 7, the upper plate 20 is substantially square in plan view, has inclined guide holes 22 formed at predetermined positions in three radial directions starting from the center, and a disk-shaped workpiece 90 is placed on the top surface 21. In side view (cross-sectional view), the inclined guide holes 22 are inclined outwardly and upwardly from the central axis of the placed workpiece 90.

[0034] In addition, the upper plate 20 is formed with a plurality of fixing holes 23 for fixing the upper plate 20, a plurality of escape holes 24 for the machining tool when the drill 80 (see Figure 12) penetrates the workpiece 90 during machining of the workpiece 90, and a plurality of pin holes 43 for inserting the positioning pins 70.

[0035] Next, the chuck member 50 will be described. As shown in Figures 1 and 8, the chuck member 50 includes a sliding portion 51 that slides in the inclined guide hole 22 of the upper plate 20, a claw portion 52 that is provided at the upper end of the sliding portion 51 and extends toward the central axis of the workpiece 90 to abut against an upper surface portion 92 of the workpiece 90, a tapered portion 53 that is provided on the claw portion 52 and whose width decreases toward the tip, a notch 54 provided in the center of the tapered portion 53, and a step portion 55 that is provided at the lower end of the sliding portion 51 and has a pin through hole 56 formed therein.

[0036] The chuck members 50 are arranged in a plurality of directions radially in a plan view with respect to the central axis of the placed workpiece 90. The step portions 55 are connected to a link member 60 that raises and lowers the chuck members 50 collectively.

[0037] Next, the link member 60 will be described. 1, 6 and 9, the link member 60 includes a central portion 61 which is a main body, a plurality of arm portions 63 which extend radially from the central portion 61 and have long holes 65 formed at their tip portions with the long diameter in the horizontal direction, and a support pin 66 which is provided so as to be movable in the long diameter direction of the long holes 65 and which is inserted into the pin through hole 56 of the chuck member 50, and the piston 12 of the cylinder 11 which raises and lowers the link member 60 is connected to the central portion 61 and fastened by the cylinder fastening member 13. In addition, a groove portion 64 which penetrates in the vertical direction is formed at the tip portion of the arm portion 62, and the step portion 55 of the chuck member 50 is fitted into this groove portion 64 and is supported by the support pin 66 so as to be swingable.

[0038] Next, the positioning pin 70 will be described. As shown in Fig. 1, Fig. 2, Fig. 10 and Fig. 11, the positioning pin 70 includes a cylindrical main body 71 that contacts the outer peripheral surface 94 of the placed workpiece 90, a first taper portion 72 that is connected to the upper end of the main body 71 and that reduces in diameter upward, a second taper portion 73 that is connected to the upper end of the first taper portion 72 and has a taper angle larger than the taper angle of the first taper portion 72, a spring seat 74 that is provided at the lower end of the main body 71 and has an outer diameter larger than the outer diameter of the main body 71, and a base end 75 that is provided at the lower end of the spring seat 74 and has an outer diameter smaller than the outer diameter of the spring seat 74. An elastic member 76 is provided at the base end 75. The elastic member 76 is, for example, a compression spring, and the compression spring is fitted into the base end 76, and the end of the compression spring abuts against the spring seat 74.

[0039] In addition, a pin hole 25 is formed downward on the upper surface 21 of the upper plate 20 at a position surrounding the placed workpiece 90, and the positioning pin 70 is arranged in the pin hole 25 so as to be movable in the vertical direction, and the base end 75 of the positioning pin 70 is supported by an elastic member 76 which is arranged at the bottom of the pin hole 25 and which expands and contracts in the vertical direction.

[0040] Next, the positioning action of the chucking positioning jig 10 of the embodiment will be described. As shown in FIG. 11(A), the workpiece 90 is moved toward the upper surface 21 of the upper plate 20 of the chucking positioning jig 10.

[0041] 11(B), the lower edge (chamfered portion 95) of the workpiece 90 shown by the imaginary line is guided by the second tapered portion 73 of the positioning pin 70, and is further guided by the first tapered portion 72, and then, as shown by the workpiece 90 shown by the solid line, the outer peripheral surface portion 94 of the workpiece 90 moves so as to slide on the main body portion 71 of the positioning pin 70, and the lower surface portion 93 of the workpiece 90 abuts against the upper surface 21 of the upper plate 20. At this time, in order to increase the positioning accuracy, there is almost no gap between the outer peripheral surface portion 94 of the workpiece 90 and the main body portion 71 of the positioning pin 70, but when the workpiece 90 is in a so-called biting state with respect to the positioning pin 70, the elastic member 76 causes the positioning pin 70 to move up and down as indicated by the arrow (1), thereby eliminating the biting state of the positioning pin 70, and the workpiece 90 moves smoothly along the positioning pin 70.

[0042] As shown in FIG. 11(C), the workpiece 90 moves smoothly along the positioning pin 70, so that the workpiece 90 reliably contacts the upper plate 20, and the workpiece 90 can be set on the chucking positioning jig 10 with high positioning accuracy.

[0043] Next, the positioning action of the chucking positioning jig 100 of the comparative example will be described. As shown in Figure 12(A), the chucking positioning jig 100 of the comparative example comprises a plate member 101 on which the workpiece 90 is placed, a fixed positioning member 102 fixed to the plate member 101, a slide positioning member 103 mounted on the plate member 101 so as to be movable laterally, a groove portion 104 which forms a space in which the slide positioning member 103 moves, and a bolt 105 which is screwed into the plate member 101 and moves the slide positioning member 103.

[0044] In the chucking positioning jig 100 of the comparative example, the workpiece 90 is placed on the plate member 101, and one end of the workpiece 90 is abutted against the fixed positioning member 102. Next, the bolt 105 is turned to move the slide positioning member 103 as indicated by the arrow (2), and the workpiece 30 is clamped.

[0045] 12(B), in the chucking positioning jig 100 of the comparative example, the workpiece 30 is held in a state in which it is subjected to a force in the direction of the arrow (3) by the slide positioning member 103. Therefore, in a free state in which no force is applied in a plan view, the workpiece 90 is a perfect circle with a diameter D1, as shown by an imaginary line, but when it is subjected to a lateral force, it becomes a workpiece 90 with an outer diameter W1, as shown by a solid line. Although the outer diameter W1 becomes smaller than the diameter D1, when the machining tool (drill) 80 is moved in this state as shown by the arrow (4) to perform hole machining on the workpiece 90, a through hole 91 with a diameter d1 is formed in the workpiece 90 with an outer diameter W1 smaller than the original diameter D1.

[0046] 12(C), in the chucking positioning jig 100 of the comparative example, when the slide positioning member 103 is moved as indicated by the arrow (5) and the force applied to the workpiece 90 is released, the workpiece 90 returns to its original size. As a result, the through hole 91 in the workpiece 90 is enlarged in the direction of the arrow (6), and the through hole 91 shown by the solid line changes from the diameter d1 indicated by the imaginary line to a diameter (longer diameter) d2 larger than the diameter d1, thereby decreasing the machining accuracy.

[0047] Next, the positioning action of the chucking positioning jig 10 of the embodiment will be described. 12(D), in the chucking positioning jig 10 of the embodiment, the workpiece 90 is positioned on the upper plate 20, and the chuck member 50 is moved as shown by the arrow (7) to press and hold the workpiece 90 from above. Therefore, the lateral dimensions of the workpiece 90 do not change. In this state, the machining tool (drill) 80 is moved as shown by the arrow (8) to drill holes in the workpiece 90.

[0048] As shown in FIG. 12(E), when the chuck member 50 is moved and the workpiece 90 is released, the diameter of the through hole 91 formed in the workpiece 90 becomes d1, and the workpiece 90 can be machined with high precision.

[0049] Next, the effects of the present invention will be described. According to this configuration, the chucking positioning jig 10 is provided with a positioning pin 70 that protrudes upward from the upper plate 20 and guides the outer peripheral surface portion of the workpiece, and a chuck member 50 that is movably mounted in the inclined guide hole 22 of the upper plate 20 and descends obliquely to press and hold the workpiece 90 from above. Since the positioning and chucking (holding) of the workpiece 90 are performed by separate members, each function can be performed with high quality.

[0050] Specifically, since the positioning pin 70 only has a function of guiding the outer peripheral surface portion 94 of the workpiece 90, unlike the conventional technology in which the upper surface (chamfered portion) of the disc-shaped workpiece is pressed from above with a tapered surface, the present invention can perform positioning in the lateral direction (XY plane in general coordinates) with high precision by guiding the outer peripheral surface portion 94 of the disc-shaped workpiece 90. In addition, since the chuck member 50 is provided movably in the inclined guide hole 22 of the upper plate 20 and descends obliquely to press and hold the workpiece 90 from above, unlike the conventional technology in which a claw portion having a tapered surface is moved laterally to push it into the chamfered portion of the workpiece, the present invention presses the upper surface of the positioned disc-shaped workpiece 90, so that the disc-shaped workpiece 90 can be held without being damaged or distorted, and since the workpiece 90 is not distorted, subsequent processing can also be performed with high precision.

[0051] Furthermore, when setting or removing the workpiece 90, the chuck member 50 opens outward in plan view and retreats along the inclined guide hole 22 of the upper plate 20, so that the chuck member 50 does not get in the way and the workpiece 90 can be easily set or removed. In this way, the chucking positioning jig 10 of the present invention can hold the disk-shaped workpiece 90 without damaging or distorting it, and can position it with high accuracy for precision machining.

[0052] With this configuration, the positioning pin 70 can easily catch and guide even the workpiece 90 that has entered a significantly misaligned position during setting, due to the second taper portion 73, which has a taper angle larger than the taper angle of the first taper portion 72. The first taper portion 71, which is connected to the upper end of the main body portion 71 and narrows in diameter toward the upward direction, allows the workpiece 90 to be positioned almost accurately. The cylindrical shape of the main body portion 71 allows the main body portion 71 to be in contact with the outer peripheral surface portion 94 of the workpiece 90 in parallel, allowing positioning with greater precision.

[0053] According to this configuration, the positioning pin 70 is provided in the pin hole 25 so as to be movable in the vertical direction, and the base end 75 of the positioning pin 70 is supported by an elastic member (spring) 76 that is provided at the bottom of the pin hole 25, 32, 43 and expands and contracts in the vertical direction. As a result, there is no gap between the work 90 and the multiple positioning pins 70 arranged at positions surrounding the work 90. ​​Therefore, even if the work 90 is guided at an angle and is in a so-called galling state with the positioning pin 70, the positioning pin 70 supported by the elastic member (spring) 76 moves up and down to eliminate the galling state of the work 90, and the work 90 can be smoothly guided to the upper surface 21 of the upper plate 20. As a result, the work 90 can be positioned with higher accuracy.

[0054] According to this configuration, the chuck member 50 includes a sliding portion 51 that slides in the inclined guide hole 22, and a claw portion 52 that is provided at the upper end of the sliding portion 51 and extends toward the central axis of the workpiece 90 to abut against an upper surface portion 92 of the workpiece 90, so that when the disk-shaped workpiece 90 is chucked, the claw portion 52 abuts only against the upper surface portion 92 of the workpiece 90 without contacting an outer peripheral surface portion 94 of the workpiece 90, and the workpiece 90 can be held without being damaged or distorted. Furthermore, the claw portion 52 includes a tapered portion 53 that narrows toward the tip and a notch 54 provided in the center of the tapered portion 53, so that the force when holding the workpiece 90 is dispersed, and the workpiece 90 can be held with less load.

[0055] According to this configuration, the chuck members 50 are arranged in multiple directions radially with respect to the central axis of the placed workpiece 90 in a plan view, so that the workpiece 90 is held by distributing the force with the multiple chuck members 50, and the workpiece 90 can be held with less load. Furthermore, the link member 60 connects the multiple chuck members 50 to the multiple arm portions 63 extending radially from the central portion 61, respectively, and the multiple chuck members 50 are raised and lowered collectively by one link member 60, so that even if the chucking mechanism includes multiple chuck members 50, the number of parts can be reduced and the space can be reduced. Furthermore, since the long hole 65 whose major axis is in the horizontal direction is formed at the tip portion of the arm portion 63, when the chuck member 50 holds the workpiece 90, even if the chuck member 50 descends obliquely along the inclined guide hole 22 and the support pin 66 attached to the step portion 55 located at the bottom of the chuck member 50 moves in the horizontal direction, the long hole 65 can absorb the horizontal movement of the support pin 66. Therefore, no extra link member is required to absorb the lateral movement of the support pin 66, and the chucking mechanism can be made of a small number of parts and occupy a small space, allowing the positioning jig itself to be made compact.

[0056] According to this configuration, the middle plate 30 is formed with a hollow portion 31 which serves as a space for the link member 60 to ascend and descend, and the link member 60 is stored in this hollow portion 31, so that even if the chucking positioning jig 10 is placed inside a processing machine, the link member 60 can be protected from chips of the workpiece 90 when the workpiece 90 is processed, allowing the chucking of the chucking positioning jig 10 to function normally, and always enabling high-precision processing. Furthermore, since it is only necessary to place the middle plate 30 and the lower plate 40 under the upper plate 20, assembly is easy.

[0057] In the embodiment, the link member 60 is moved by the cylinder 11 operated by air, but the present invention is not limited to this, and the link member 60 may be moved by an electric actuator.

[0058] In addition, in the embodiment, three chuck members 50 are used for one workpiece 90, but this is not limited thereto, and the number of chuck members 50 may be two, four, etc., and any number of chuck members 50 is acceptable. In addition, in the embodiment, three positioning pins 70 are used for one workpiece 90, but this is not limited thereto, and the number of positioning pins 70 may be four, five, etc., and any number of positioning pins 70 is acceptable.

[0059] In other words, the present invention is not limited to the examples as long as the functions and effects of the present invention are achieved. [Industrial Applicability]

[0060] The technology of the present invention is suitable for a chucking and positioning jig that detachably holds and positions a disk-shaped workpiece. [Explanation of symbols]

[0061] 10... Chucking positioning jig 20…Upper plate (support plate) 21…Top surface 22... Inclined guide hole 25…Pin hole 30... Middle plate (support plate) 31… Cavity part 31a…Arm groove 32…Pin hole 40… Lower plate (support plate) 41... Cylinder through hole 43…Pin hole 50… Chuck member 51... Sliding part 52… Claw part 53… Tapered section 54…Notch 55...Double part 56… Pin through hole 60... Link member 61…Central part 63… Arm section 64… Groove 65… Long hole 66… Support pin 70… Positioning pin 71… Main body 72… First taper section 73… Second taper section 74… Spring seat 75... Proximal end 76... Elastic members (compression springs, springs) 80... Machining tools (drills, reamers) 90... Workpiece (disc-shaped workpiece) 91...Through hole 92...Top part 93… Bottom part 94…Outer peripheral surface part 100... Bag receiving mechanism

Claims

1. A chucking and positioning jig that detachably holds and positions a disk-shaped workpiece, A chucking positioning jig comprising: an upper plate on which the workpiece is placed and in which an inclined guide hole is formed which inclines upward outward from the central axis of the workpiece; a positioning pin which protrudes upward from the upper plate and guides the outer peripheral surface portion of the workpiece; and a chuck member which is movably mounted in the inclined guide hole of the upper plate and descends obliquely to press and hold the workpiece from above.

2. 2. The chucking positioning jig according to claim 1, The positioning pin is characterized in that it comprises a cylindrical main body portion that contacts the outer peripheral surface portion of the workpiece placed on it, a first tapered portion that is connected to the upper end of the main body portion and narrows in diameter toward the upper end, and a second tapered portion that is connected to the upper end of the first tapered portion and has a taper angle larger than the taper angle of the first tapered portion.

3. 3. The chucking positioning jig according to claim 1, A pin hole is formed downward on the upper surface of the upper plate at a position surrounding the placed workpiece, The positioning pin is arranged in the pin hole so as to be movable in the vertical direction, and the base end of the positioning pin is supported by an elastic member arranged at the bottom of the pin hole and expands and contracts in the vertical direction.

4. 3. The chucking positioning jig according to claim 1, The chuck member is characterized in that it comprises a sliding portion that slides along the inclined guide hole, a claw portion provided at the upper end of the sliding portion, extending toward the central axis of the workpiece and abutting the upper surface of the workpiece, a tapered portion provided on the claw portion whose width decreases toward the tip, and a notch provided in the center of the tapered portion.

5. 5. The chucking positioning jig according to claim 4, The chuck member is provided at a lower end of the sliding portion and includes a step portion having a pin through hole formed therein, and is arranged in a plurality of directions radially with respect to a central axis of the workpiece placed thereon in a plan view; The step portion is connected to a link member that raises and lowers the chuck members collectively, the link member includes a central portion serving as a main body, a plurality of arm portions extending radially from the central portion and each arm portion has a long hole having a long diameter in a lateral direction at its tip portion, and a support pin that is provided movably in a long diameter direction of the long hole and is inserted into the pin through hole, A chucking positioning jig, characterized in that a cylinder for raising and lowering the link member is connected to the central portion.

6. 6. The chucking positioning jig according to claim 5, A chucking positioning jig characterized in that a middle plate having a hollow portion formed therein which serves as a space through which the link member rises and falls is provided below the upper plate, and a lower plate supporting the cylinder is provided below the middle plate.

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