JPS6232746Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a workpiece positioning device that can prevent the occurrence of scratches when attaching and detaching the workpiece when performing various processing with the workpiece positioned on a reference plane.

B. Prior art When performing various processing on the finished surface of a workpiece, for example, when making taps,
In order to avoid damaging the finished surface, the finished surface of the workpiece is pressed against a specific reference plate, and a tap is inserted into the workpiece from the front of the reference plate for processing. For this reason, when processing a workpiece, the finished surface is in close contact with the reference plate and remains stationary, so the finished surface is not damaged, but when the workpiece is removed,
If the workpiece is slid along the reference plate and taken out, it may scratch the finished surface of the workpiece, or chips generated in the machining area may enter between the workpiece and the reference plate and scratch the finished surface. There is a problem that the value of the product is reduced by attaching it. Also, during processing,
It is necessary to accurately position the machined position on the finished surface of the workpiece and the machined hole in the reference plate for installation, which results in poor installation work efficiency, so automation has been desired.

B. Purpose of the invention This invention aims to provide a positioning device that does not cause damage to the finished surface of a workpiece when it is attached or removed, and that can automatically and highly accurately position and fix the workpiece in one motion. be.

C. Structure of the invention This invention has a reference plate 1 on the upper surface of the support frame 2.
A slide block 3 is provided so as to be slidable in the front and back direction facing the workpiece, and a reference pin 14 that penetrates into the workpiece and presses it is integrally provided on the upper surface of the slide block 3.
The lower end of a swing lever 17 is pivotally attached to the rear end of the swing lever 17, and a clamp member 21 for pressing the rear end of the workpiece is attached to the upper end of the swing lever 17 so as to be horizontally rotatable. The tip of the piston rod of the drive cylinder 24 provided at the end is connected to the intermediate portion of the swing lever 17.

D. Embodiment Figures 1 to 4 are drawings showing an embodiment of the present invention, and in the figures, 1 is a reference plate that serves as a reference when machining a workpiece 28, and is fixed vertically by appropriate means. There is. A machining hole (not shown) is formed in the reference plate 1 in correspondence with the position of the work 28 to be machined, and a processing machine (not shown) is provided in front of the hole.

2 is a support frame placed at the rear of the lower part of the reference plate 1; 3 is a slide block provided on the upper surface of the support frame 2 so as to be slidable in the front and back direction, facing the reference plate 1; both ends are attached to the upper surface of the support frame 2 Support blocks 4 fixed upright facing the front and rear
2 built across R, 5R, 4L, and 5L.
The parallel guide rods 6 and 7 are slidably supported through bearings 8 and 9. A return rod 1 is attached to the rear end surface 3a of the slide block 3.
0,11 are provided, and the return rods 10,1
The rear end of 1 is slidably passed through the rear support blocks 5R and 5L, and the rear end flange portion 10
Springs 12 and 13 are interposed between a and 11a and the rear support blocks 5R and 5L, so that the slide block 3 is always returned to the rear position.

Reference numeral 14 denotes a reference pin provided on the upper surface of the central portion of the slide block 3, and the lower shaft portion 14a is inserted into a fixing hole 15 formed in the slide block 3, and the peripheral flange 14b is engaged with the slide block 3 by bolts. This reference pin 14 is connected to the upper shaft portion 1
4c is formed to have a slightly smaller diameter than the center hole of the work 28, and its front and rear surfaces are chamfered to facilitate mounting of the work 28, and arcuate lands 16R, 16L are formed on both sides.

Reference numeral 17 denotes a swing lever provided swingably at the center of the rear end surface of the slide block 3, which is formed into a plate shape, and has a cylindrical rotation support shaft 18 integrally formed at its upper end. The swing lever 17 has its lower end inserted into a U-shaped support portion 19a of a mounting bracket 19 fixed to the slide block 3, and is mounted on a pivot 20 so as to be swingable.

Reference numeral 21 denotes a clamp member which is rotatably mounted on the rotation support shaft 18 at the upper end of the swing lever 17, and has pressing pins 22 and 23 fixed through it at both ends. Therefore, when the clamp member 21 is moved forward, it rotates horizontally around the rotation support shaft 18, and the pressing pins 22, 23 on both sides
presses the rear end surface of the workpiece 28.

Reference numeral 24 denotes a drive cylinder for swinging the swinging lever 17. The rear end of the cylinder 24 is swingably pivoted to a support bracket 25 which is fixed upright on the rear end of the upper surface of the support frame 2. A connecting bracket 26 is engaged, and the connecting bracket 26 is placed over the middle portion of the swinging lever 17, and is connected to the swinging lever 17 by a linking pin 27 so as to be swingable. Therefore, when the drive cylinder 24 expands and contracts, the slide block 3 and the clamp member 21 are moved back and forth via the swing lever 17.

In the above structure, the operation thereof will be explained. The drive cylinder 24 is shortened to move the slide block 3 and the clamp member 21 backward. In this state, the workpiece 28 is lifted by a lifter (not shown).
is supplied from above to cover the reference pin 14, and after the lifter rises, the drive cylinder 24 is extended. Then, as the piston rod 24a extends, the swinging lever 17 is first swung forward about the lower pivot 20 to move the clamp member 21 forward, and the press pins 22 and 23 provided on the clamp member 21 move the workpiece 28. contacts the rear end surface, thereby pressing the workpiece 28 from both sides toward the center,
Subsequently, the swinging lever 17 is swung forward using the tip surfaces of the press pins 22 and 23 as fulcrums, and the slide block 3 is moved slightly forward, thereby the reference pin 14 moves forward and lands 16R and 16 are moved forward.
L comes into contact with the front end of the inner peripheral surface of the workpiece 28. In this state, the slide block 3 and the clamp member 21 are further moved to the workpiece 28 via the swing lever 17.
The front end surface of the workpiece 28 is pressed against the reference plate 1 and fixed by moving forward while pressing the front end surface of the workpiece 28.

When the workpiece 28 is pressed against the reference plate 1, the processing machine operates to insert a tool from the front of the reference plate 1 and process the workpiece 28.

When the machining is completed and the tool leaves the reference plate 1, the drive cylinder 24 is moved to shorten. Then, as the piston rod 24a is shortened, the swing lever 17 is first swung backwards about the pivot 20, and the clamp member 21 is moved back and the pressing pins 22, 23 are separated from the workpiece 28, and the return rods 10, 11 are moved back. The slide block 3 is moved backward by the elasticity of the springs 12 and 13 provided in the workpiece 28, and the reference pin 14 is moved backward, and the lands 16R and 16L are brought into contact with the rear end of the inner peripheral surface of the workpiece 28, and then the workpiece 28 is moved back. 28 is pushed backward and separated from the reference plate 1. Thereafter, the lifter descends to grip the workpiece 28, and then ascends to take out the workpiece 28 from the reference pin 14. Thereafter, the above-described operations are repeated to process the workpiece 28.

Effects of the invention This invention moves the workpiece horizontally relative to the reference plate while pressing it with the reference pin and clamp member, fixes it closely to the reference plate, moves it horizontally again after machining, separates the workpiece from the reference plate, and Since the workpiece is taken out from the reference pin using a lifter or the like in a free state, there is no rubbing between the finished surface of the workpiece and the reference plate when the workpiece is taken out, and there is no risk of damaging the finished surface of the workpiece. In addition, it is possible to carry the workpiece into and out of the reference pin at a position away from the reference plate, and when it is fixed, the reference pin and the pressing pin provided on the clamp member press the left and right sides of the inner and outer peripheral surfaces of the workpiece in a specific direction. Therefore, the workpiece can be automatically positioned, and the loading/unloading and positioning of the workpiece can be automated, and the workability of this type of work is greatly improved. Furthermore, a single drive cylinder moves the slide block and clamp member, and the clamp member rotates along the circumference of the workpiece and presses it accurately from both sides with approximately the same force.
A compact device with accurate positioning can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an embodiment of a workpiece positioning device according to the present invention, Fig. 2 is a vertical side view of the positioning device, Fig. 3 is a front view of the positioning device, and Fig. 4 is a rear view of the positioning device. It is a diagram. 1... Reference plate, 2... Support frame, 3... Slide block, 6, 7... Guide rod, 14
... Reference pin, 17 ... Swing lever, 20 ... Pivot, 21 ... Clamp member, 24 ... Drive cylinder, 28 ... Work.

Claims (1)

[Scope of utility model registration request] a slide block provided on the support frame so as to be slidable in the front and rear directions, facing the reference plate;
A reference pin is fixed to the upper surface of the center part of the slide block and penetrates into the workpiece, a swing lever is pivotally attached to the rear end of the slide block so that the lower part can swing freely, and the center part is horizontally attached to the top end of the swing lever. The clamp member is rotatably mounted and presses the workpiece from behind, and the drive cylinder is connected to the middle part of the swing lever and moves the reference pin and the clamp member back and forth via the swing lever. Characteristic workpiece positioning device.