JPH07214439A - Positioning fixation device of work - Google Patents

Abstract

PURPOSE:To make the exchange work of pallets unnecessary and improve the processing precision of a work and at the same time conduct high speed processing. CONSTITUTION:The column block 4 of a work 1 is inserted into a base stand 21, and the lower surface 3a of a joint block 3 and the outer periphery surface 4a of the column block 4 butt against each other, and the outer periphery surface 4a of the column 4 is positioned, and at the same time a work support jig 23 to conduct support so that the work 1 may be able to rotate horizontally with the column block 4 as a center is provided. The upper surfaces of flanges 2a, 2b at the work 1 are respectively push-pressed by means of a push-pressing block 36, a clamp block 51 and actuators 46, 60, and the lower surface 3a of the joint block 3 is positioned in regard to the work support jig 23. When a reference block 42 and a butting block 57 respectively butt against inside side surfaces 7 by the downward movement of a turning operation block 70, the positioning of the inside side surfaces 7 is conducted, and at the same time clamping is carried out so that the work 1 may not rotate horizontally with the column block 4 as a center.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning / fixing device, and more particularly to a work positioning / fixing device for positioning and fixing a work when the work is punched.

[0002]

2. Description of the Related Art Conventionally, there is a work 1 having a shape as shown in FIGS. The work 1 is composed of flanges 2a and 2b facing each other and a joint block 3 connecting the lower ends of the flanges 2a and 2b, and the work 1 is formed in a U shape. A column block 4 is formed on the lower surface of the joint block 3.

As shown in FIGS. 12 (a) to 12 (c), cup holes 5 are formed in the flanges 2a and 2b of the work 1. The process of processing the cup hole 5 will be described with reference to FIG.
As shown in (a), a cup hole 5 slightly smaller than the finished size is formed on the flange 2 by a processing device such as a drill (not shown).
a and 2b. Next, as shown in FIG. 12B, the chamfered portion 6 is formed on the peripheral edge of the cup hole 5 on the inner peripheral surfaces of the flanges 2a and 2b facing each other. Further, as shown in FIG. 12C, the inner peripheral surface of the cup hole 5 is finished so that the inner diameter of the cup hole 5 becomes the finished size.

Further, the processing of the cup hole 5 is carried out by the cylindrical block 4
The outer peripheral surface 4a, the lower surface 3a of the joint block 3, and the inner side surface 7 of the one flange 2a are positioned on the three machining reference surfaces, and then the machining is performed.

FIG. 13 shows a positioning and fixing device 8 for positioning the three processing reference planes. On the upper surface of the work table 9, four positioning pins 10 (only two are shown by dotted lines in the figure) are provided. A pallet 11 having a rectangular parallelepiped shape is placed on the upper surface of the work table 9, and the positioning pins 10 are fitted into the four corners of the lower surface of the pallet 11. Therefore, the pallet 11 has the positioning pins 1
It is arranged at a predetermined position on the work table 9 by 0. In addition, the pallet 11 has four (only three are shown in the figure) pallet fixing claws 12 for the work table 9
It has been fixed by tightening against.

The pallet 11 has two work supporting jigs 1
3 is provided, and the cylindrical block 4 of the work 1 is inserted into the work support jig 13. The outer peripheral surface 4a of the cylindrical block 4 and the lower surface 3a of the joint block 3 are in contact with the work supporting jig 13. In this state, the work 1 can be rotated in the horizontal direction around the columnar block 4.

A support rod 14 extending upward is provided upright on the central upper surface of the pallet 11, and a work fixing block 15 is vertically movably inserted into the support rod 14. The work fixing block 15 is inserted between the flanges 2a and 2b of the work 1. And support rod 1
By tightening the tightening nut 16 screwed to the work 4, the work fixing block 15 fixes the work 1 with respect to the work supporting jig 13 so as not to rotate in the horizontal direction. At this time, at least one side surface of the work fixing block 15 is in contact with one inner side surface 7 of the flanges 2a and 2b.

Therefore, by inserting the cylindrical block 4 of the work 1 into the work supporting jig 13, the outer peripheral surface 4a is positioned, and by fixing the work fixing block 15 by tightening, the side surface of the work fixing block 15 is fixed. The inner side surface 7 is positioned by bringing the inner side surface 7 of the flange 2a into contact with each other. Further, by fixing the work fixing block 15 by tightening, the lower surface 3a of the joint block 3 is pressed and positioning is performed.

A semicircular avoiding portion 17 having an opening at the bottom is formed on both sides of the work fixing block 15.
This is to prevent the work fixing block 15 from interfering with each other when the cup hole 5 is formed in the flanges 2a and 2b.

Then, the flanges 2a, 2 of the work 1 are processed by a processing device (not shown) provided with the work table 9 as a reference.
The cup hole 5 is formed in b by the above-described processing step.

[0011]

By the way, the reason why the pallet 11 is interposed between the work supporting jig 13 and the work table 9 is to cope with changes in the dimensions of the flanges 2a and 2b of the work 1. That is, a plurality of pallets 11 including work fixing blocks 15 suitable for the dimensions of the flanges 2a and 2b are prepared in advance. Therefore, when the dimensions of the flanges 2a and 2b of the work 1 change, the pallet 11 is replaced. However, there is a problem that the number of types of the work 1 increases and the number of types of the pallets 11 increases, and the replacement work of the pallets 11 becomes very troublesome.

A work supporting jig 13 for fixing the work 1 is provided via a pallet 11. Therefore, a dimensional error due to the pallet 11 is included between the work 1 mounted on the work supporting jig 13 and the work table 9. Therefore, the flanges 2a, 2 of the work 1
There is a problem that the processing accuracy of the cup hole 5 formed in b becomes poor.

Further, since a gap is formed between the work fixing block 15 and the inner side surfaces 7 of the flanges 2a and 2b, the work 1 is rattled with respect to the work supporting jig 13. Therefore, when processing the cup hole 5 in the flanges 2a and 2b by a processing device (not shown), there is a problem that high-speed processing cannot be performed by the processing device.

The present invention has been made in view of the above-described circumstances, and an object thereof is to eliminate the need for pallet replacement work, improve the working accuracy of the work, and position the work capable of high-speed working. To provide a fixing device.

[0015]

In order to achieve the above object, the invention according to claim 1 forms a U-shape by connecting the lower ends of the supporting pieces facing each other with a connecting piece. In a work positioning and fixing device for positioning and fixing a work provided with a circular protrusion on the lower surface of the protrusion, the protrusion of the workpiece is inserted, and the lower surface of the connecting piece and the outer peripheral surface of the protrusion abut, While positioning the outer peripheral surface of
A positioning jig provided on a work table that rotatably supports a work in a horizontal direction around a projecting portion and an upper surface of a supporting piece of the work are pressed to lower the lower surface of the connecting piece to the positioning jig. When the pressing and positioning means for positioning and the inner side surface of the support piece are brought into contact with and separated from each other, and the respective inner side surfaces are brought into contact with each other, the inner side surface is positioned and the work is prevented from horizontally rotating around the projecting portion. The gist of the present invention is that it is provided with a positioning and fixing means for clamping to.

According to a second aspect of the present invention, the lower ends of the support pieces facing each other are connected by a connecting piece to form a U-shape, and a workpiece having a circular protrusion on the lower surface of the connecting piece is positioned and fixed. In the work positioning and fixing device, the projecting portion of the work is inserted, the lower surface of the connecting piece and the outer peripheral surface of the projecting portion contact each other, the outer peripheral surface of the projecting portion is positioned, and the work is centered around the projecting portion. A positioning jig provided on a work table that is rotatably supported in the horizontal direction, and a moving support means that moves up and down with respect to the work table,
The movably supporting means is rotatably supported, and the lower surface of the connecting piece is pressed to the positioning jig by pressing the upper surfaces of the supporting pieces of the works supported by the positioning jig by the downward movement of the moving supporting means. The pressing and positioning means for pressing and positioning and the moving support means are arranged between the support pieces by the downward movement of the moving support means. The gist of the present invention is to provide a positioning and fixing means for clamping so as not to rotate in the horizontal direction at the center.

According to a third aspect of the present invention, there is provided a reference setting pressing block which is rotatably supported by the moving supporting means, presses an upper surface of one supporting piece of the work, and abuts against an inner side surface thereof. A clamp block that is movably coupled to the reference setting pressing block in a direction in which it abuts the inner side surface of the other supporting piece and presses the upper surface of the other supporting piece of the work, and the clamping block of the other side. The gist of the present invention is that the positioning and fixing means is composed of an operation block that brings the reference setting pressing block into contact with the inner side surface of one of the support pieces by bringing it into contact with the inner side surface of the support piece.

[0018]

According to the invention described in claim 1, the projecting portion of the work is inserted into the positioning jig, and the lower surface of the connecting piece and the outer peripheral surface of the projecting portion are brought into contact with the positioning jig provided on the work table. The outer peripheral surface of the protrusion is positioned. When the positioning pressing means presses the upper surface of the support piece, the lower surface of the connecting piece is pressed by the positioning jig, and the lower surface of the connecting piece is positioned. At this time, the supporting pieces are respectively pressed by the positioning pressing means, but the work is in a state in which it can rotate in the horizontal direction around the protruding portion. The positioning fixing means abuts on the inner side surfaces of the support pieces while the support pressing pieces are being pressed by the positioning pressing means. The positioning fixing means contacts the inner side surface of the support piece to position the inner side surface and clamp the work.

According to the second aspect of the present invention, the projecting portion of the work is inserted into the positioning jig, and the lower surface of the connecting piece and the outer peripheral surface of the projecting portion contact the positioning jig provided on the work table. The outer peripheral surface of the protrusion is positioned. At this time, the work is supported rotatably in the horizontal direction around the protrusion. When the moving support means that moves up and down with respect to the work table moves downward, the pressing and positioning means respectively press the upper surfaces of the support pieces of the work supported by the work supporting jig. Therefore, the lower surface of the connecting piece of the work is pressed against the positioning jig, and the lower surface of the connecting piece is positioned.

Further, the positioning and fixing means is arranged between the supporting pieces by the downward movement of the moving and supporting means. Then, the positioning and fixing means respectively abuts on the inner side surfaces of the support pieces, positions the inner side surfaces, and clamps the work so as not to rotate in the horizontal direction around the protruding portion.

According to the third aspect of the invention, when the clamping block is moved relative to the reference setting pressing block by the operation block of the positioning and fixing means, the clamping block contacts the inner side surface of the other supporting piece. Contact. By this abutment, the reference setting pressing block abuts on the inner side surface of one supporting piece. In addition, since the clamping block is connected to the reference setting pressing block so that it can move relative to the reference setting pressing block, the clamping block moves relative to the reference setting pressing block, and each block comes into contact with the inner side surface of the support piece. To do. Therefore, the reference setting pressing block positions the inner side surface of one of the support pieces, and
The work is clamped so that it does not rotate horizontally around the protrusion.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. Since the work of the present embodiment is the same as the work of the conventional technique, the same reference numerals are given and detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, a through hole 22 is formed in a base 21 as a work table, and this through hole 22 is formed at the lower end of a work supporting jig 23 as a positioning means. The flange portion 23a is fitted. Further, the work supporting jig 23 is fixed to the base 21 by a plurality of bolts (only one is shown in FIG. 1) 24. A fitting hole 25 into which the cylindrical block 4 of the work 1 is fitted is formed in the work supporting jig 23. The work 1 is placed on the upper surface of the work support jig 23.
The contact surface 26 with which the lower surface 3a of the joint block 3 comes into contact is formed.

Therefore, when the cylindrical block 4 of the work 1 is fitted into the fitting hole 25 of the work supporting jig 23, the outer peripheral surface 4a of the cylindrical block 4 abuts on the fitting hole 25, and
The lower surface 3a of the joint block 3 contacts the contact surface 26 of the work supporting jig 23. Then, by fitting the cylindrical block 4 into the fitting hole 25 of the work supporting jig 23, the outer peripheral surface 4a of the work 1 is positioned.

Side portion of the base 21 (left side in FIG. 1)
A guide rod 27 serving as a movement supporting means and a pressing positioning means is disposed at a predetermined position. A fixing device 30 for positioning and fixing the work 1 is provided at the tip of the guide rod 27. The guide rod 2
The controller 7 can be moved up and down by a controller 31 via a predetermined actuator (not shown), and the vertical movement can stop the fixing device 30 at an arbitrary position in the vertical direction. .

A small diameter rod 32 is formed at the tip of the guide rod 27, and the fixing device 30 is attached to the small diameter rod 32.
The support block 33 as the moving support means and the pressing and positioning means constituting the above is inserted. The support block 33 is a fixed nut 3 screwed onto the tip of the small diameter rod 32.
The support block 33 is clamped and fixed to the rod 27 by tightening with 2a. The support block 33
Is a connecting portion 34 and guide blocks 35a, 35 on both sides thereof.
and b, and is formed in a U shape. And
The small-diameter rod 32 is inserted into the connecting portion 34 (left side in FIG. 2) of the support block 33, and the guide block 35
The a and 35b are located above the base 21.

A pressing block 36 as a pressing positioning means and a reference setting pressing block is supported between the guide blocks 35a and 35b so as to be rotatable in the left-right direction in FIG. That is, the guide pins 37 formed on the right and left side surfaces of the pressing block 36 project from the guide block 35.
It is inserted into a guide hole 38 formed in a and 35b. Therefore, the pressing block 36 is rotatably supported by the guide pin 37 between the pressing block 36 and the guide blocks 35a and 35b.

A guide guide hole 39 is formed in the pressing block 36 so as to penetrate therethrough in the vertical direction. An arc-shaped guide groove 40 is formed on the rear side of the guide guide hole 39 (on the side of the guide rod 27 in FIG. 1). Also, the guide groove 40
A notch portion 41 is formed in the lower portion of the pressing block 36 on the side where is provided, thereby forming a reference block 42 as a positioning and fixing means.

As shown in FIG. 3, this reference block 42
Abutting surfaces 43 projecting toward the notch portion 41 and abutting on the inner side surface 7 of the flange 2a of the work 1 are formed on both sides of the outer side surface in the width direction. Also, FIG.
As shown in FIG. 5, an actuator 46 as a pressing positioning means that moves up and down by a spring 45 is disposed below the pressing block 36, and the actuator 46 is cut from the lower surface of the pressing block 36 by the urging force of the spring 45. It is in the state of being projected.

Further, on the lower surface of the reference block 42, there is provided a semicircular avoidance portion 48 which is open at the lower side so as not to interfere with a processing device (not shown) at the time of processing for forming the cup hole 5 in the flanges 2a, 2b. Has been formed.

A cutout arranging portion 50 is formed in the lower portion on the front side (the side where the guide rod 27 is not arranged in FIG. 1) of the pressing block 36. Further, a clamp block 51 as a pressing positioning means is arranged in the cutout arranging portion 50. The pressing block 36
An arranging recess 52 communicating with the cutout arranging portion 50 is formed therein, and the protruding portion 53 of the clamping block 51 is arranged in the arranging recess 52.

A predetermined gap g is formed between the pressing block 36 and the clamping block 51, and between the disposing recess 52 and the protrusion 53. As shown in FIG. 6, an insertion hole 88 is formed in the projection 53 in the horizontal direction.
A large-diameter insertion hole 89 having a diameter slightly larger than that of the insertion hole 88 is formed in the pressing block 36 so as to correspond to the insertion hole 88. A support rod 54 is disposed in the insertion hole 88 and the large diameter insertion hole 89.

A recess 90 is formed on the outer peripheral surface of the support rod 54.
Are formed in two places, and the support rod 54 is formed by the recess 90.
A cylindrical portion 91a is provided at the center of the
a and 91b are formed respectively. Cylindrical portion 91a,
The size of 91b is such that it can be inserted through the insertion hole 88. Further, the cylindrical portion 91a is disposed in the insertion hole 88,
The cylindrical portion 91b is arranged in the large diameter insertion hole 89. Furthermore, a gap is formed between the large diameter insertion hole 89 and the cylindrical portion 91b.

Therefore, the clamp block 51 is rotatably supported by the support rod 54 with respect to the pressing block 36. Further, due to the gap between the cylindrical portion 91 b of the support rod 54 and the large-diameter insertion hole 89 and the gap g between the pressing block 36 and the clamp block 51, the clamp block 51 is slightly different from the support rod 54. It is rattling.

A notch 55 is formed in the lower outside of the clamping block 51 to form a contact block 57 as a positioning and fixing means. 3 and 6
As shown in FIG. 5, the contact surface 58 of the contact block 57 protrudes toward the notch 55 on both sides of the outer side surface in the width direction and contacts the inner side surface 7 of the flange 2b of the work 1.
Are formed respectively. Further, below the contact block 57, an actuator 60 as a pressing and positioning means that moves up and down by a spring 59 is arranged, and the actuator 60 is moved from the lower surface of the clamping block 51 to the cutout portion 55 by the urging force of the spring 59. It is in a protruding state.

The lower surface of the contact block 57 has a semi-circular avoidance portion 61 whose lower side is opened so as not to interfere with a processing device (not shown) when the cup hole 5 is formed in the flanges 2a and 2b. Are formed.

As shown in FIG. 5, the work supporting jig 2
When the pressing block 36 moves downward while the work 1 is placed on the work 3, the actuators 46 and 60 contact the top surfaces of the tops of the flanges 2a and 2b of the work 1. At this time, the urging forces of the springs 45 and 59 press the actuators 46 and 60 against the workpieces 2a and 2b, so that the workpiece 1 is pressed against the workpiece support jig 23. Therefore, the lower surface 3a of the joint block 3 of the work 1 is pressed against the contact surface 26 of the work supporting jig 23, and the lower surface 3a of the work 1 is positioned by pressing the actuators 46 and 60.

At this time, since the lower ends of the actuators 46 and 60 are formed in an arc shape, the actuator 4
6, 60 and the top surfaces of the tops of the flanges 2a, 2b are in point contact. Therefore, the work 1 can be rotated in the horizontal direction around the columnar block 4 with little influence on the pressing force of the actuators 46 and 60.

Further, the inside of the clamp block 51 is formed so as to project into the guide guide hole 39.
In addition, the housing recess 6 is formed on the inner side surface of the clamp block 51.
3 is formed. Due to the formation of the accommodation recess 63,
An upper projecting portion 65 and a lower projecting portion 66 are formed on the clamping block 51, respectively.

A rotation operation block 70 as an operation block is arranged in the guide guide hole 39 so as to be vertically movable. The outer peripheral surface 71 of the rotation operation block 70 is guided by the arc-shaped guide groove 40. Then, as the outer peripheral surface 71 moves along the guide groove 40, the rotation operation block 70 moves up and down along the guide guide hole 39.

On the other side surface of the rotary operation block 70, an abutment projection 72 is formed which is disposed in the accommodating recess 63 of the clamping block 51. Then, the rotation operation block 7
When 0 moves up along the guide guide hole 39, the contact protrusion 7
2 is in contact with the upper protruding portion 65. At this time, the clamp block 51 rotates around the support rod 54, and the contact block 57 approaches the reference block 42. Further, when the rotating operation block 70 moves downward along the guide guide hole 39, the contact protrusion 72 contacts the lower protrusion 66. At this time,
The clamp block 51 rotates around the support rod 54, and the contact block 57 is separated from the reference block 42.

On the upper part of the rotating operation block 70, an operation rod 73 projecting above the pressing block 36 is provided. A lid 74 that closes the guide guide hole 39 is attached and fixed to the upper surface of the pressing block 36 with a screw 75. Therefore, the operation rod 73 is inserted through the lid 74 and is projected upward.

An installation space 76 is formed in the guide guide hole 39 between the lid 74 and the rotation operation block 70. A coil spring 77 inserted through the operating rod 73 is arranged in the arrangement space 76. The coil spring 77 is also arranged in the guide groove 40 of the guide guide hole 39. Therefore, the turning operation block 70 is always biased by the biasing force of the coil spring 77 so as to move downward.

As shown in FIG. 2, the support block 33.
A hydraulic cylinder 81 is vertically attached to the guide block 35b so that the cylinder rod 80 faces upward. Like the guide rod 27, the hydraulic cylinder 81 is also operated by hydraulic oil supplied under the control of the controller 31.

A connecting plate 83 is fixed to the tip of the cylinder rod 80 by a nut 84. The operation rod 73 is loosely inserted at the tip of the connecting plate 83. Further, the stopper block 8 is attached to the tip of the operation rod 73.
5 is fastened and fixed by a nut 86. Therefore,
When the cylinder rod 80 of the hydraulic cylinder 81 extends,
The connecting plate 83 contacts the stopper block 85. Then, when the cylinder rod 80 further extends, the connecting plate 83 pulls up the operation rod 73 while resisting the biasing force of the coil spring 77.

Then, as shown in FIG. 4, the rotation operation block 70 moves upward along the guide guide hole 39. Therefore, the abutment protrusion 72 abuts the upper protrusion 65, the clamp block 51 is rotated about the support rod 54, and the abutment block 57 is brought closer to the reference block 42.

At this time, the reference block 42 and the contact block 57 are smaller than the dimension between the flanges 2a and 2b, so that the reference block 42 and the contact block 57 can be arranged between the flanges 2a and 2b. Has become.

On the contrary, when the cylinder rod 80 of the hydraulic cylinder 81 contracts, the connecting plate 83 moves the stopper block 85.
It is designed to be separated from. Therefore, the turning operation block 70 moves downward along the guide guide hole 39 by the biasing force of the coil spring 77. Therefore, the contact protrusion 7
2 comes into contact with the lower protrusion 66, and the clamping block 5
1 is rotated around the support rod 54, and the contact block 5
7 is separated from the reference block 42.

At this time, the contact surface 43 of the reference block 42
Is pressed against the inner side surface 7 of the flange 2a, and the inner side surface 7 of the work 1 is positioned by the contact surface 43 of the reference block 42. Further, since the contact surface 58 of the contact block 57 contacts and is pressed against the inner side surface 7 of the flange 2b, the reference block 42 and the contact block 57 cause the flange 2 of the workpiece 1 to come into contact.
A and 2b are clamped, and the work 1 is fixed so as not to rotate in the horizontal direction around the cylindrical block 4.

Next, the operation of the positioning and fixing device 30 configured as described above will be described. First, the cylindrical block 4 of the work 1 is fitted to the work supporting jig 23 of the base 21 so that the flanges 2a and 2b are parallel to the direction orthogonal to the paper surface of FIG. At this time, the outer peripheral surface 4 a of the columnar block 4 is positioned by the fitting hole 25 of the work supporting jig 23.

Next, the controller 31 operates the hydraulic cylinder 81 to extend the cylinder rod 80.
The extension of the cylinder rod 80 causes the connecting plate 83 to move the operating rod 73 to the spring 77 via the stopper block 85.
Pull up against the urging force of. Then, the rotation operation block 70 is in the guide guide hole 39, and the outer peripheral surface 71 is in the guide groove 4.
Move up along 0.

When the rotation operation block 70 moves upward,
The contact protrusion 72 is the upper protrusion 6 of the clamp block 51.
Engage with 5. By this engagement, the clamp block 51
Rotates about the support rod 54 and approaches the reference block 42. In this state, the controller 31 moves the guide rod 27 downward to a predetermined position as shown in FIG.

Then, the actuator 46 provided on the pressing block 36 comes into contact with the upper surface of the top portion of the flange 2a,
Actuator 6 provided on the clamp block 51
0 abuts on the top surface of the top of the flange 2b. Further, the flanges 2a and 2b are pressed downward by the springs 45 and 59 by an appropriate biasing force. Therefore, the lower surface 3 a of the joint block 3 of the work 1 is pressed against the contact surface 26 of the work supporting jig 23, and the lower surface 3 a of the work 1 is pressed.
Positioning of a is performed.

Further, since the contact block 57 and the reference block 42 are brought close to each other by the rotation operation block 70, the mutual blocks 57 and 42 are formed on the flanges 2a and 2b.
It will be in the state of being arranged between them. At this time, as shown in FIG. 5, it is arranged at a position separated from the contact surface 43 of the reference block 42 by several mm.

Since the actuators 46, 60 are in point contact with the flanges 2a, 2b, the flanges 2a, 2b
Even if 2b is pressed, the work 1 can be rotated in the horizontal direction around the cylindrical block 4. The actuators 46 and 60 are also in a state where they can easily move on the upper surfaces of the flanges 2a and 2b.

In this state, when the controller 31 operates the hydraulic cylinder 81 to contract the cylinder rod 80, this contraction causes the stopper block 85 to move to the connecting plate 8.
3 are separated. Then, the urging force of the coil spring 77 causes the rotation operation block 70 to move downward along the guide guide hole 39. By this downward movement, the contact protrusion 72 of the rotation operation block 70 contacts the lower protrusion 66. for that reason,
The clamp block 51 rotates around the support rod 54. At this time, the actuator 60 also slightly slides on the top surface of the top of the flange 2b.

When the clamping block 51 rotates, the contact surface 58 of the contact block 57 is pressed against the inner side surface 7 of the flange 2b. On the other hand, the downward movement of the rotation operation block 70 causes the pressing block 36 to rotate around the guide pin 37, and the reference block 42 is also pressed against the inner side surface 7 of the flange 2a. Therefore, the contact surface 58 of the contact block 57 contacts the inner side surface 7 of the flange 2b, and the reference block 4
The second contact surface 43 also comes into contact with the inner side surface 7 of the flange 2a.

This is because when the rotation operation block 70 rotates the clamping block 51 due to a slight rattling of the pressing block 36 with respect to the clamping block 51,
This is because the contact surface 58 of the contact block 57 tries to contact the inner side surface 7 in a stable state. Further, the reference block 42 contacts the inner side surface 7 of the flange 2a by the rotation of the pressing block 36. At this time, since the distance from the guide pin 37 to the contact surface 43 is actually about 50 cm, the movement of the contact surface 43 is substantially equivalent to sliding. Therefore, the contact surface 43 of the reference block 42 can be brought into contact with the inner side surface 7 of the flange 2a.

Therefore, the inner side surface 7 of the work 1 is positioned by the contact surface 43 of the reference block 42. Further, the reference block 42 and the contact block 57 can clamp the flanges 2a and 2b to prevent the work 1 from rotating in the horizontal direction around the columnar block 4.

Furthermore, in FIG. 5, when the flanges 2a and 2b are not parallel to the direction orthogonal to the paper surface, the reference block 42 and the contact block 57 are the flanges 2a and 2b.
When clamping, the posture can be corrected.

Therefore, the fixing device 30 positions the work 1 at three positions. In this state, the cup hole 5 is formed into the flange 2 by a processing device (not shown) provided on the basis of the base 21 in the same processing step as the conventional one.
a, 2b can be formed.

In this embodiment, the pressing block 36 is rotatably supported by the support block 33. Therefore, the inside surfaces 7 of the flanges 2a and 2b are different from the contact surfaces 43 and 58 of the reference block 42 and the contact block 57.
, The pressing block 36 rotates about the guide pin 37, so that the contact surfaces 43 and 58 of the reference block 42 and the contact block 57 are not attached to the flange 2.
It can be brought into contact with the inner side surface 7 of a, 2b.

Further, the clamp block 51 rotatably provided with respect to the pressing block 36 is provided with a slight rattling. Therefore, even if the contact surface 43 of the contact block 57 is not parallel to the inner side surface 7 of the flange 2b, the rattling of the clamping block 51 causes the contact surface 58 to contact the inner side surface 7 of the flange 2b. Rotate to hit. As a result, the contact surfaces 43 and 58 are not
The workpiece 1 can be clamped in a stable state because it can be brought into contact with the workpiece.

Further, unlike the conventional case, since the pallet 11 is not interposed between the work supporting jig 23 and the base 21,
The processing accuracy of the cup hole 5 for the work 1 can be improved. Since the pallet 11 can be eliminated, the replacement work can be eliminated and the workability can be improved.

Further, by rotating the clamping block 51, the reference block 42 and the contact block 57 can be arranged between the flanges 2a and 2b. As a result, the work 1 can be reliably clamped by the reference block 42 and the contact block 57 even if the dimension between the flanges 2a and 2b changes. Moreover, one fixing device 3
With 0, many works 1 can be positioned and fixed.

Further, the reference block 42 and the contact block 5
Since the work 1 is clamped by 7, it is possible to eliminate rattling between the work 1 and the reference block 42 and the contact block 57. As a result, it is possible to perform high-speed processing when forming the cup hole 5 in the work 1, and further, it is possible to improve the processing accuracy and shorten the processing time.

In this embodiment, the operating rod 73 is moved upward by the hydraulic cylinder 81. In addition to this, it is also possible to use a solenoid switching valve, a pneumatic cylinder or the like to move the operation rod 73 upward.

Further, the coil spring 77 is eliminated and the connecting plate 83 and the operating rod 73 are fixed. It is also possible to move the operation rod 73 and the rotation operation block 70 up and down by the hydraulic cylinder 81 to rotate the clamping block 51.

In this embodiment, the fixing device 30 for positioning and fixing one work 1 is embodied. Besides this,
The fixing device 30 is provided on the right side of the center line L1 in FIG.
It is also possible to configure such that one work 1 is positioned and fixed at the same time.

In this embodiment, the support block 54 supports the clamping block 51 against the pressing block 36.
Is rotatably provided. In addition to this, as shown in FIG. 7, the support pin 100 inserted into the clamping block 51 is inserted into the insertion hole 101 formed in the side surface of the disposing recess 52 in the pressing block 36, and the support pin 100 is inserted into the insertion hole. 10
It may be configured such that there is rattling with respect to 1.
At this time, similarly to the above-described embodiment, the clamp block 5
A gap g is formed between 1 and the pressing block 36.

Further, as shown in FIG. 8, the pressing block 3
Support pins 100 are formed on both inner side surfaces of the recessed portion 52 of 6, and the support pins 100 are inserted into the insertion holes 103 of the clamp block 51. Further, the support pin 100 can be configured to have a rattling with respect to the insertion hole 103.

Further, as shown in FIG. 9, the pressing block 36
A rail portion 105 is formed in the lower part of the rail so as to expand downward, and a rail groove 106 into which the rail portion 105 is fitted is formed in the clamping block 51. Also, the rail portion 105
A gap 107 is formed between the lower surface of the rail and the rail groove 106. With this configuration, the clamp block 51 slides with respect to the pressing block 36, and the work 1 can be clamped by this slide. Further, the clamp block 5 is attached to the pressing block 36 by the gap 107.
1 can have rattling.

As a result, even in the configurations of FIGS. 7 to 9,
The contact surfaces 43 and 58 can be brought into contact with the inner side surface 7 of the work 1. Further, as shown in FIGS. 1 and 3, the air supply hole 11 communicating with the contact surface 48 of the pressing block 36.
0 is formed and air is supplied to the air supply hole 110.
Then, when the controller 31 detects that the contact surface 48 is in contact with the inner side surface of the flange 2a and no air leaks, it is determined that the work 1 is clamped by the reference block 42 and the contact block 57. be able to.

[0074]

As described above in detail, according to the present invention, since the pallet is eliminated, the work of exchanging the pallet can be eliminated, and the work can be reliably clamped, so that high speed machining can be performed. The excellent effect that the working accuracy of the work can be improved is obtained.

[Brief description of drawings]

FIG. 1 is a partial side sectional view showing a state in which a work is positioned and fixed by a positioning and fixing device according to the present invention.

FIG. 2 is a partially cutaway front view showing a state where a work is positioned and fixed by a positioning and fixing device.

FIG. 3 is a partial cross-sectional view showing the shapes of a reference block and a contact block.

FIG. 4 is a partial side sectional view showing the configuration of a positioning and fixing device.

FIG. 5 is a partial side sectional view showing a state in which the reference block and the contact block are arranged between the flanges, and the flanges are pressed by the actuator.

FIG. 6 is a partial cross-sectional view showing a connected state of the clamp block and the pressing block.

FIG. 7 is a partial front view showing another example of the connected state of the clamp blocks.

FIG. 8 is a partial front view showing another example of the connected state of the clamp blocks.

FIG. 9 is a partial front view showing another example of the connected state of the clamp blocks.

FIG. 10 is a perspective view of a work.

FIG. 11 is a side view of the work.

12A is an explanatory diagram showing a first step of forming a cup hole, FIG. 12B is an explanatory diagram showing a second step of forming a cup hole, and FIG. It is explanatory drawing which shows the 3rd process.

FIG. 13 is a partial perspective view showing a conventional work positioning and fixing device.

[Explanation of symbols]

1 ... Work, 2a, 2b ... Flange as support piece, 3
... Joint block as connecting piece, 3a ... Bottom surface, 4
... Cylindrical block as projecting portion, 4a ... Outer peripheral surface, 7 ... Inner side surface, 21 ... Work table base, 23 ... Work supporting jig as positioning jig, 27 ... Press positioning means and movement supporting means Guide rods, 33 ... Support blocks as pressing and positioning means and moving supporting means, 36 ... Pressing blocks as pressing and positioning means and reference setting pressing blocks, 42 ... Reference blocks as positioning and fixing means, 46 ... Actuators as pressing and positioning means , 51 ... Clamping block as pressing and positioning means, 57 ... Abutment block as positioning and fixing means, 60 ... Actuator as pressing and positioning means, 70 ... Rotating operation block as positioning and fixing means and operation block

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Hayashi 20 Ishigane, Toyama City, Toyama Prefecture Fujikoshi Co., Ltd.

Claims (3)

[Claims] 1. A workpiece positioning and fixing device for positioning and fixing a workpiece, wherein lower ends of support pieces facing each other are connected by a connecting piece to form a U-shape, and a circular protrusion is provided on a lower surface of the connecting piece. In, the projecting portion of the work is inserted, the lower surface of the connecting piece and the outer peripheral surface of the projecting portion contact, the outer peripheral surface of the projecting portion is positioned, and the work is rotatable in the horizontal direction around the projecting portion. A positioning jig provided on a supporting work table, pressing positioning means for pressing the upper surface of the supporting piece of the work and positioning the lower surface of the connecting piece with respect to the positioning jig, and an inner side surface of the supporting piece. Positioning that positions the inner side surface when it comes in contact with and separates from the inner side surface, and clamps the work so that it does not rotate horizontally around the protrusion. Positioning and fixing device for workpieces with a fixing means. 2. A workpiece positioning and fixing device for positioning and fixing a workpiece, wherein lower ends of supporting pieces facing each other are connected by a connecting piece to form a U-shape, and a circular protrusion is provided on a lower surface of the connecting piece. In, the projecting portion of the work is inserted, the lower surface of the connecting piece and the outer peripheral surface of the projecting portion contact, the outer peripheral surface of the projecting portion is positioned, and the work is rotatable in the horizontal direction around the projecting portion. A positioning jig provided on a supporting work table, a moving supporting means that moves up and down with respect to the working table, and a rotatably supported movably supporting means, and positioning by moving the moving supporting means downwardly. Pressing and positioning means for respectively pressing the upper surfaces of the supporting pieces of the work supported by the jig and pressing the lower surface of the connecting piece against the positioning jig, and the lower movement of the moving supporting means. And positioning fixing means for contacting the inner side surfaces of the supporting pieces to position the inner side surfaces and clamping the work so as not to rotate horizontally around the projecting portion. Workpiece positioning and fixing device. 3. A reference setting pressing block, which is rotatably supported by the moving supporting means, presses an upper surface of one supporting piece of the work, and abuts on an inner side surface thereof, and the reference setting pressing block. On the other hand, a clamp block, which is connected so as to be relatively movable in the direction of contacting the inner side surface of the other support piece, and presses the upper surface of the other support piece of the work, and the clamp block is attached to the inner side surface of the other support piece. The work positioning and fixing device according to claim 2, wherein the positioning and fixing means is configured by an operation block that abuts the reference setting pressing block on the inner side surface of one of the support pieces.