JPH0847735A - Work positioning device - Google Patents

Abstract

PURPOSE:To precisely position a work in a roughly positioned condition due to the rotational deviation to the prescribed position with a small space. CONSTITUTION:A work W is received and held by a holding part 110 having turnable holding tip members 111, and pulled in the direction of the X-axis reference 124 by an X-axis positioning part 120. This constitution rotates the work W, and the holding space parallel to the X axis at the right and left holding tip members 111 is changed, and this change is absorbed by the rotation of the holding tip members 111 and the rotation of a swaying member whose holding part 110 is fixed. After the positioning with reference to the X axis, the work W is moved to the direction of the Y-axis reference to be positioned to the Y-axis reference by the Y-axis positioning part together with the X-axis positioning part 120 and the holding part 110. The work W can be precisely positioned to the X-Y reference with a small space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning device for correcting a position of a work which is displaced and supplying the work to a work machine such as a press brake.

[0002]

2. Description of the Related Art Generally, when machining a work, the work is gripped by a gripping device, moved in the X-Y axis direction, and set at a predetermined position in a work processing machine such as a punch press. . At this time, the work needs to be set at a predetermined position because the set position serves as a reference for the processing position. That is, if it is not set at the correct position, the processing position is determined in this state, and processing such as punching is performed in a portion different from the design drawing.

Therefore, there has been proposed a method of positioning the work by aligning the work with the reference position. For example, actual Kaihei 1
In -165130, the first and second positioning members are provided on the work table for positioning in the X and Y axis directions, and the third end is provided at the other end of the two pivotally mounted links. No. 3 link is swingably hung, and a work holding portion for holding a work is provided on this third link,
There is disclosed a configuration in which the link is moved in the X and Y axis directions to perform the alignment. Further, in the case of a large work (for example, 2 m × 4 m), after setting the work, the work is pushed in the reference direction to be aligned with the reference position.

[0004]

However, the method in the above-mentioned actual Kaihei 1-165130 has a problem that cannot be dealt with when the work is rotating. That is,
The third link corresponds to one side of the parallelogram, and since the opposing sides are fixed, the movement direction of the workpiece for alignment can be parallel or perpendicular to the fixed side. Therefore, there is a problem that the work cannot be dealt with when the work is rotating. Further, when the work is pushed in, there is a problem that the center portion of the work is lifted (buckling) due to the push-in, so that accurate positioning cannot be performed. Therefore, an object of the present invention is to provide a work positioning device that solves the above problems.

[0005]

In order to achieve the above object, the present invention is a work positioning device provided on a work table of a work processing machine for receiving and aligning a work at a rough position with respect to a predetermined position. In which a workpiece is received and gripped, and a gripping portion having a gripping tip member that rotates in response to the rotation of the workpiece that occurs when the workpiece is aligned with the gripping portion, is coupled to the gripping portion, and the workpiece is referenced to the X-axis. A Y-axis position that is connected to the X-axis alignment section that pulls in the direction and makes contact with the X-axis reference, and that moves the workpiece in the Y-axis reference direction and makes contact with the Y-axis reference. And a mating portion.

[0006] For example, the X-axis aligning portion includes a swing member to which the grip portion is fixed, a pull-in slider means connected by a connecting pin so that the swing member is rotatable, and a pull-in slider means. A retracting cylinder connected to the retracting slider, and retracting the retracting cylinder retracts the retracting slider means in the X-axis reference direction, and the swinging member rotates around the connecting pin along with the retracting. It is moved to bring the end of the work into contact with the X-axis reference.

Further, the Y-axis aligning portion has a mounting base to which the X-axis aligning portion is fixed, a sliding means for sliding the mounting base in the Y-axis direction, and the mounting means for moving the mounting base in the Y-axis direction. Move it axially,
And a moving cylinder for bringing the workpiece into contact with the Y-axis as a reference.

[0008]

Based on the above construction, the operation of the present invention will be described with reference to FIG. FIG. 1 (a) shows a state in which the gripping portion grips the workpiece W placed at a rough position and the retracting cylinder retracts. When gripping the work, both of the retracting cylinders are advanced by a predetermined amount, so the gripping distance (L) is always constant from the X-axis reference. When each of the retracting cylinders starts to retract in this state, the corner (P1) of the work first comes into contact with the X-axis reference. After this, when the retracting cylinder continues to retreat, the work rotates around the corner (P1) and finally the end side of the work comes into contact with the X-axis reference. At this time, the gripping interval of the work (distance parallel to the X-axis reference) changes with the rotation of the work, so that the gripping tip member rotatably provided is rotated by the rotation of the work, and the gripping portion is rotated. The swinging member to which is fixed rotates to absorb the change in the gripping interval. Therefore, the X-axis reference can be adjusted without hindering the rotation of the work. In addition, in the present invention, when attaching the grip portion, a centering structure is adopted to effectively absorb the change in the grip interval.

After that, the work is moved in the Y-axis reference direction (D) and brought into contact with the Y-axis reference, whereby the Y-axis can be aligned. This state is shown in Fig. 1 (b). By independently aligning the X axis and the Y axis in this manner, it is possible to align the workpiece in a predetermined state even when the workpiece is rotating.

[0010]

Embodiments of the present invention will be described with reference to the drawings. Figure 2
FIG. 2 (a) is a top view of a positioning device using the workpiece positioning device according to the present invention, and FIG. 2 (b) is a side view thereof. The positioning device 10 includes a positioning device 100 for positioning the work W, a holding device 200 for strongly holding the aligned work W, and the positioning device 10.
0 and the holding device 200 are fixed to the common base 3
00, a feed device that feeds the common base 300 in the direction of the processing machine 30 such as a press brake and supplies the work W to the processing machine 30, and these are mounted on a work table 500. The positioning device 100 and the holding device 20
0 is provided on the left and right with respect to the X-axis reference 124. These will be described separately below.

(1) Positioning Device (100) The positioning device 100 includes a gripping part 110 for gripping a work W located at a rough position, and an X-axis alignment part 120 for aligning the work W with an X-axis reference 124. , Y axis reference 131
The work W is aligned at a predetermined position by including the Y-axis alignment unit 130 that aligns the workpiece W. FIG. 3 shows a cross section taken along the line AA in FIG.

1. Gripping Part (110) The gripping part 110 has a pair of gripping jaw members 112 and a gripping cylinder 115 for closing the gripping jaw members 112, and the gripping jaw member 112 is a gripping part of the work W. The gripping tip member 111 is rotatably provided. The grip jaw member 112 is attached to the grip jaw member attachment plate 11 by a pin 117.
3 is rotatably attached and is biased in the opening direction by a spring 116. Therefore, when the grip cylinder 115 retracts, the grip jaw member 112 is opened by the spring 116 and the grip tip member 111 releases the work W. Conversely, when the grip cylinder 115 moves forward, the grip jaw member 112 is closed and the grip tip member is closed. 111 holds the work W.

FIG. 4 shows a side view taken along the line CC in FIG. As can be seen from this figure, the grip 110 has a centering structure. That is, the gripping jaw member mounting plate 113 is provided on the swinging member 123, which will be described later, in a substantially inverted T shape, and both sides of the bottom portion thereof are biased by the aligning springs 118. Therefore, when the gripping interval (distance parallel to the X-axis reference) changes due to rotation of the work W or the like, the gripping jaw member mounting plate 113
Shifts from the center position (or a predetermined position) to absorb the change in the gripping interval. After the alignment is completed, the central position is restored.

2. X-axis alignment section (120) The work W gripped by the gripping section 110 as described above is rotating from a predetermined position or displaced in the X and Y axis directions. Therefore, one end of the work W is aligned with the X-axis reference 124 by the X-axis alignment unit 120 to correct the rotation of the work W and the displacement of the X-axis. Therefore, the X-axis alignment unit 120 has a pull-in slider 125a, and the swing member 12 is attached to the pull-in slider 125a.
3 are pin-connected by the connecting pin 121. Below the pull-in slider 125a, the pull-in guide 1
25b is provided, and the pull-in guide 125b is fixed to the attachment member 126. The pull-in slider 125a is constituted by the pull-in slider 125a and the pull-in guide 125b.

A pull-in cylinder 122 is connected to the pull-in slider 125a. Therefore, when the retracting cylinder 122 retracts, the retracting slider 125a retracts accordingly, and the swing member 123 pin-coupled to the retracting slider 125a,
As a result, the grip 110 is retracted. If the work W is in a rotating state, the pulling operation causes parallel movement of one point of the corner of the work W until it comes into contact with the X-axis reference 124, and thereafter, the work W rotates about the corner. Then, as the work W rotates, the gripping tip member 111
And the swinging member 123 also rotates around the coupling pin 121. At this time, as described above, the aligning spring 118
Moves, and the gripping tip member 111, the swinging member 123, and the like respectively rotate, so that the regulation force against the rotation of the work W does not work, and even if the gripping distance changes, the X-axis reference 12
4 can be aligned.

Each X-axis reference 124 has a sensor at the position of the X-axis alignment section 120, and when the workpiece W rotates and is detected by this sensor, the corresponding X-axis alignment section 120 stops. Finally, when the two sensors both detect the work W, that is, when one end side of the work W abuts the X reference 124, the alignment with the X axis reference 124 is completed, whereby the next Y Axis alignment unit 130
Starts to work.

3. Y-axis alignment section (130) The Y-axis alignment section 130 will be described with reference to FIG. Y
The axis aligning unit 130 has a moving rod 133 fixed to the X-axis aligning unit 120, and the moving rod 133 is connected to the moving cylinder 134. Also, the mounting member 12
A moving slider 135a is provided on the bottom surface of 6, and a moving guide 135 engaged with the moving slider 135a.
b is fixed to the common base 300.

In the above structure, the moving cylinder 134 holds the work W while the holding part 110 holds the work W.
10 is moved in the direction of the Y-axis reference 131. Y-axis reference 1
Since 31 has a sensor 132, when this sensor 132 detects the work W, the operation of the moving cylinder 134 is stopped, and the alignment of the work W to the Y-axis reference 131 is completed, which causes the next holding device. 200 works. At this time, the Y-axis alignment unit 130 grips both sides of the work W and abuts them on the Y-axis reference, so that problems such as buckling do not occur and accurate alignment can be achieved. It becomes possible to align the XY axes in the space.

(2) Holding Device (200) FIG. 5 is a side view taken along the line BB in FIG.
The holding device 200 has a holding jaw member 211 for holding the work W.
And a holding cylinder 213 and the like. Holding jaw member 2
11 is rotatably attached to a holding jaw member attachment plate 212 by a pin 214, and this holding jaw member 211 is attached to the attachment member 1
It is fixed to 26. Further, the rear end of the holding jaw member 211 is connected to the holding cylinder 213 via a link 215.

In the above structure, when the work W is aligned in a predetermined position by the XY axis alignment portions 120 and 130, the holding cylinder 213 advances and the holding jaw member 211 rotates about the pin 214. As a result, the work W is strongly held, and the feeding device 400 operates to send the work W to the processing machine 30 side. At this time, the grip 11
0 is releasing the work W.

(3) Feeding device (400) The feeding device 400 includes a positioning body 413 fixed to the common base 300 and a screw shaft 4 screwed to the positioning body 413.
12 and a screw drive motor 410 connected to the screw shaft 412, a numerical control encoder 411, and the like.

Then, the screw drive motor 410 rotates while the work W is firmly held by the holding device 200.
Then, the positioning body 413 is screw-fed by the screw shaft 412, and the common base 300 is sent to the processing machine 30 side.
Therefore, the holding device 200 fixed to the common base 300 also moves, and the work W is sent to the processing machine 30. Since the common base 300 is provided with the feed slider 414a and the work table 500 is provided with the feed guide 414b, the work W is fed along the feed guide 414b, and the feed amount is for numerical control. The encoder 411 controls by detecting the number of rotations of the screw shaft 412.

[0023]

[Effect] As described above, since the gripping tip member and the gripping portion are independently rotatable, and the work is aligned independently for each of the X axis and the Y axis,
Even if the workpiece is rotating in the rough position, it can be delivered to the processing machine in a constant state. Further, at the time of position alignment, it is possible to perform position alignment in a small space regardless of the size of the work by minimizing the method of retracting or moving the work.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a positioning mechanism according to the present invention.

2A and 2B are views of a position determination device using the present invention, FIG. 2A is a top view and FIG. 2B is a side view.

3 is a sectional view of the positioning device of the present invention in FIG.

FIG. 4 is a view showing an alignment mechanism of the positioning device of FIG.

5 is a sectional view of the gripping device in FIG.

[Explanation of symbols]

 10 Positioning Feeding Device 20 Transfer Conveyor 30 Processing Machine 100 Positioning Device 110 Gripping Device 111 Gripping Tip Member 112 Gripping Jaw Member 113 Gripping Jaw Member Mounting Plate 114 Cylinder Head 115 Gripping Cylinder 118 Aligning Spring 120 X Axis Aligning Unit 121 Coupling Pin 122 Retracting cylinder 123 Swing member 124 X-axis reference 126 Mounting member 130 Y-axis alignment part 131 Y-axis reference 132 Sensor 133 Moving rod 134 Moving cylinder 200 Holding device 211 Holding jaw member 212 Holding jaw member mounting plate 213 Holding cylinder 215 Link 300 Common base 400 Feeder 410 Screw drive motor 411 Numerical control encoder 412 Screw shaft 413 Positioner 500 Work table

Claims (3)

[Claims] 1. A work table provided on a work processing machine for receiving a work in a rough position with respect to a predetermined position,
In a work positioning device for aligning a work, a grip portion having a grip tip member that receives and grips a work, and rotates following the rotation of the work that occurs when the work is aligned; , The work is drawn in the direction of the X-axis reference, and is connected to the X-axis alignment unit that is swingably provided to bring the work into contact with the X-axis reference and the gripping unit, and moves the work in the Y-axis reference direction. And a Y-axis aligning portion that is brought into contact with the Y-axis reference, and a workpiece positioning device. 2. The X-axis aligning portion, a swinging member to which the grip portion is fixed, a pull-in slider means coupled by a coupling pin so that the swinging member can swing freely, and A retracting cylinder connected to the retracting slider, and retracting the retracting cylinder retracts the retracting slider means in the X-axis reference direction, and the swinging member rotates around the coupling pin along with the retracting. The work positioning device according to claim 1, wherein the work is moved to bring the end of the work into contact with the X-axis reference. 3. The Y-axis aligning portion, a mounting base to which the X-axis aligning portion is fixed, a slide means for sliding the mounting base in the Y-axis direction, and the mounting base by the slide means. The work positioning device according to claim 1 or 2, further comprising: a moving cylinder that moves in the Y-axis direction to bring the work into contact with the Y-axis reference.