JP2001353637A - Plate material origin positioning device of plate material finishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate material origin positioning device of a plate material finishing machine capable of certainly holding even a machined nonferrous metal material or a machined material that is molded in a shape having a recess and a projection or punched. SOLUTION: This plate material origin positioning device of the plate material finishing machine comprises a clamp means 128 capable of grabbing the end part of the machined material W under a work table 33, a lifting cylinder 127 for driving the clamp means so as to go out of an opening 34 provided in the work table, and a lead-in cylinder 109 for driving the lifting cylinder horizontally toward the origin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material origin positioning device for a plate material processing machine.

[0002]

2. Description of the Related Art Conventionally, in a plate processing machine such as a punch press or a laser processing machine, a reference end surface (an X-axis side end surface and a Y-axis side end surface) of a plate material (workpiece) to be processed is processed by the plate material processing machine. Clamping is performed by the plate positioning device in accordance with the origin (X = 0, Y = 0) which is the reference position.

FIG. 6 shows an example of a plate material origin positioning device in a turret punch press disclosed in Japanese Patent Application Laid-Open No. 11-28635. This plate material origin positioning device (31) is provided with a lifting cylinder (51) for raising and lowering a vacuum suction pad (55) for drawing a plate material above the plate material placed on the table.
In this configuration, a pulling cylinder (49) for moving 1) in the direction of about 45 degrees and horizontally is provided.

There is also a system in which a vacuum suction pad is moved up and down from the lower surface of the plate material to suck the plate material, and the vacuum suction pad is moved in the direction of the origin. For example, JP-A-10-180
Japanese Unexamined Patent Publication No. 677 discloses a plate material origin positioning device for such a plate material processing machine (see FIG. 7).

[0005] An example in which a magnet is used for a vacuum suction pad is described as a prior art in Japanese Patent Application Laid-Open No. 10-180677.

[0006]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 11-2
In the case of the plate material origin positioning device disclosed in Japanese Patent No. 8635, although there is no particular problem in the flat plate material before processing, when the workpiece has already been formed with irregularities or punched holes, a vacuum is formed. It is difficult to suck with a suction pad. When a magnet is used for the vacuum suction pad, the material of the workpiece is limited to a material that can be suctioned to the magnet.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a non-ferrous material to be processed and a non-ferrous material to be formed or punched. An object of the present invention is to provide a plate material origin positioning device for a plate material processing machine that can securely hold a processed material.

[0008]

According to a first aspect of the present invention, there is provided a plate material origin positioning device for a plate material processing machine, wherein a clamp means capable of gripping an end of a workpiece is provided below a work table. The gist of the present invention is to provide an elevating cylinder for driving the clamp means so as to be able to protrude and retract from an opening provided in the work table, and a retraction cylinder for horizontally driving the elevating cylinder in the direction of the origin.

According to a second aspect of the present invention, there is provided a plate material origin positioning device for a plate material processing machine according to the first aspect, wherein the clamp means comprises a clamp base which can be raised and lowered by the lifting cylinder. A clamp lever provided with a U-shaped space including an upper arm and a lower arm into which the end of the workpiece can enter, the clamp base being pivotally supported by the clamp base so as to be swingable. A point that the clamp base is provided with a lower nail that cooperates with an upper nail provided on the upper arm to clamp a workpiece, and that a clamp cylinder that swings the clamp lever is provided below the clamp base. Is what you do.

According to a third aspect of the present invention, in the sheet material processing machine according to the first or second aspect, the drawing cylinder is provided below the work table. A support member fixed to the work table is provided, and the retracting cylinder is provided on a support shaft provided on the support member so as to be horizontally rotatable,
The gist of the present invention is that a spring is provided between the support member and the rear part of the drawing cylinder to apply a tension in a direction substantially 45 degrees to the X-axis direction of the plate processing machine.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a sheet material processing machine 1 provided with a sheet material origin positioning device according to the present invention.

Referring to FIG. 1 and FIG. 2, the plate processing machine 1 includes a gate-shaped main body frame 3.
The lower frame 5 and the upper frame 7 are formed integrally with the side frame 6.

The lower frame 5 is provided with a die block 9 in which a plurality of dies D are mounted in a lattice shape so as to be movable in the Y-axis direction. The upper frame 7 is provided with punches P corresponding to the dies D in the same manner. Block 1 mounted in a grid pattern
1 is provided movably in the Y-axis direction with a slight gap from the die block 9.

The die block 9 and the punch block 11
Are integrally connected by a C-shaped C frame 8, and a nut member 13 fixed to the C frame 8 is screwed with a ball screw 15 extending in the Y-axis direction. Both ends of the shaft of the ball screw 15 are rotatably supported by bearings 17 and 19, and a Y-axis drive motor 21 is attached to one end.

In the above configuration, the Y-axis drive motor 21
Is driven to rotate the ball screw 15, the punch block 11 and the die block 9 move in the Y-axis direction at the same time.

As shown in FIG. 1, the upper frame 7 is provided with a ram drive device 25 for positioning the ram device 23 at a position above each of the punches P mounted on the punch block 11. This ram device 23 is composed of a hydraulic cylinder that can move up and down, and U and V parallel to the X and Y axis directions.
It is provided movably in the axial direction.

The above-described ram device 23 includes a ram drive device 2
5 is provided so as to be movable in the U-axis direction by the U-axis drive motor 27 and the power transmission means 29, and is also freely movable in the V-axis direction by the V-axis drive motor 31 and the ball screw 32. The punch P, the die of the die D, and the ram device 23 are collectively called a plate processing head.

With the above configuration, the U-axis drive motor 2
By appropriately driving the 7 and V axis drive motors 31, the ram device 23 is positioned above the desired punch P, and the ram device 23 is actuated to strike the desired punch P. Punching can be performed on the workpiece W positioned between the P and the die D.

As shown in FIG. 2, work tables 33 and 35 are provided on both sides (up and down in FIG. 2) of the main body frame 3. The work table 33 on the front side is provided with a first positioning device 37. The first positioning device 37 includes a gate-shaped X-axis carriage 55,
The base of the shaft carriage 55 is laid on the work table 33, and is parallel guide rails 79 extending in the X-axis direction.
A and 79B are movably engaged.

The guide rail 7 of the X-axis carriage 55
A clamp base 41 is provided on the bases on the 9A and 79B sides, and a plurality of work clamps 53 are provided on the clamp bases 41A and 41B, respectively. A second positioning device 39 similar to the first positioning device 37 is provided on the rear table 35 side. In addition, the first positioning device 37 and the second positioning device 39 are provided so that they can be moved and positioned at appropriate positions in the X-axis direction by known driving means (not shown).

In the above configuration, the first positioning device 37
Alternatively, the workpiece W can be moved and positioned at a desired position in the X-axis direction by the second positioning device 39. Therefore, punching can be performed at a desired position of the workpiece W using a desired mold.

As shown in FIG. 2, an origin positioning device 101 for mounting the workpiece W on the first positioning device 37 is provided below the work table 33.

Hereinafter, the origin positioning device 101 will be described with reference to FIG. 2 and FIGS.

The work table 33 has one X-axis reference block 103 for determining the origin position of the workpiece W, and at least two Y-axis reference blocks 105 (a,
b) is provided so as to be able to appear and disappear with respect to the pass line PL.
In addition, the work table 33 includes the origin positioning device 10.
An opening 34 is provided in which a clamp means 128 described later can advance on a pass line.

The workpiece engagement surface of the X-axis reference block 103 is provided at X = 0, and the workpiece engagement surface of the Y-axis reference block 105 (a, b) is Y = 0 is provided on the straight line.

Below the work table 33, a cylinder mounting member 107 fixed to the work table 33 is provided. A retraction cylinder 109 is provided on the cylinder mounting member 107 in a horizontal posture. The lower abdomen of the retracting cylinder 109 is provided with a rotating shaft 111 vertically projecting downward. The rotating shaft 111 is rotatably supported by a bearing 113 provided on the cylinder mounting member 107.

The rear part of the retracting cylinder 109 (FIG. 3)
In the lower abdomen, a pin 115a for hooking a hook at the end of the spring is provided. A similar pin 115b is also provided upright on the upper surface of the cylinder mounting member 107 behind the pin.
A tension spring 117 is stretched between a and the pin 115b.

It should be noted that the pin 115b is located at an appropriate position on a straight line connecting the center of the rotation shaft 111 and the center of the pin 115b with respect to the X-axis direction of the plate processing machine 1 at about 45 degrees. Is provided.

A bracket 121 is provided on the piston rod 119 of the retracting cylinder 109, and a guide block 125 is fixed to the bracket 121 by a plurality of bolts 123. An elevating cylinder 127 is integrally fixed to the guide block 125 via a cylinder bracket 129 provided below the guide block 125.

Next, the clamping means 128 will be described. The above-described lifting cylinder 127 is provided with a clamping means 128 for clamping the workpiece W so as to be able to move up and down with respect to the opening 34.

The piston rod 131 of the elevating cylinder 127 is provided so as to be able to advance and retreat in the vertical direction. A clamp base 133 parallel to the work table 33 is fixed to the upper end of the piston rod 131 by bolts 135.

Further, two guide rods 137 provided in parallel with the piston rod 131 are fitted to the above-described guide block 125 so as to be able to move up and down, and the upper portions thereof are fixed to the lower surface of the clamp base 133 by bolts 139. I have.

A clamp lever 143 having a U-shaped space formed by an upper arm 141u and a lower arm 141d, into which the end of the workpiece W can enter, is pivotally supported by the hinge pin 145 on the clamp base 133. I have.

The clamp base 133 has an upper clamp nail 1 provided at an end of the upper arm 141u.
A lower clamp nail 149 for gripping the workpiece W in cooperation with 47 is provided. This lower clamp nail 149
Is rotatably supported in a horizontal direction on a rotating shaft 153 provided vertically to a bearing 151 provided on the clamp base 133.

The clamp lever 143 is provided with a clamp cylinder 155 for swinging the clamp lever 143 about a hinge pin 145 as a fulcrum. The clamp cylinder 155 is fixed to the lower side of the clamp base 133, and its piston rod 157 is connected to the elongated hole 159 of the tip of the lower arm 141d of the clamp lever 143 so that the clamp lever 143 can swing. is there.

Next, the origin positioning device 101 having the above configuration
Will be described.

In the state where the first positioning device 37 is moved from the origin, the workpiece W is placed on the work table 3.
3, the retracting cylinder 109 is operated to move the clamp means 128 forward (to the left in FIG. 4) from the storage position (the position in FIG. 4), and the upper and lower clamp nails (147, 149) of the clamp means 128 are moved. The center position is moved to an elevating position (position in FIG. 5) ahead of the Y-axis reference (Y = 0).

Next, the lifting cylinder 127 is operated,
The clamping means 128 is raised from the opening 34. At this time, the upper surface of the lower clamp nail 149 is
The stroke of the lifting cylinder 127 is set so as to correspond to.

Subsequently, the clamp lever 143 is rotated counterclockwise by the clamp cylinder 155 of the clamp means 128 to release the clamp means 128 and
The clamping means 128 is moved backward (to the right in FIG. 5) by the pull-in cylinder 109, and the clamp lever 143 is rotated clockwise by the clamp cylinder 155 to clamp the end of the workpiece W.

Next, in a state where the workpiece W is clamped, the retracting cylinder 109 causes the clamping means 128 to clamp.
In the direction of about 45 degrees with respect to the X axis. By this forward step, the reference end surfaces (the X-axis side end surface and the Y-axis side end surface) of the workpiece W are brought into contact with the X-axis reference block 103 and the Y-axis reference block 105 (a, b).

When the reference end surface of the workpiece W is slightly inclined with respect to the X-axis reference line or the Y-axis reference line, a rotational moment acts on the retraction cylinder 109 by the forward movement of the retraction cylinder 109. At this time, the retracting cylinder 109 moves forward while rotating about the rotation shaft 111, and the reference end face of the workpiece W is placed on the X-axis reference block 103 and the Y-axis reference block 105 (a, b). The contact can be ensured.

The X-axis reference block 103 and the Y-axis reference block 105 (a, b) are provided with sensors (not shown) for detecting the contact of the workpiece W, and these sensors are turned on. , The work clamp 53 of the plate processing machine is operated to clamp the workpiece W on the Y-axis reference end face side.

Next, at the same time when the clamp of the clamp means 128 is opened, the clamp means 128 is advanced to the elevating position (the position of FIG. 5). Retreat. When the clamping means 128 releases the clamp, the direction of the retracting cylinder 109 returns to the original direction due to the tension of the tension spring 117. Thereafter, the same process is repeated every time the home position is determined.

[0045]

According to the first or second aspect of the present invention, a non-ferrous workpiece and a workpiece having irregularities or a punched hole near an end are securely held. To perform origin positioning.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the origin can be reliably positioned even with a work material that is placed slightly inclined.

[Brief description of the drawings]

FIG. 1 shows a front view of a sheet material processing machine provided with a sheet material origin positioning device according to the present invention.

FIG. 2 is a view taken along line AA in FIG. 1;

FIG. 3 is an enlarged view of a portion B in FIG. 2;

FIG. 4 is a cross-sectional view taken along the line CC in FIG. 3, showing the origin positioning device in a storage position.

FIG. 5 is a cross-sectional view taken along the line CC in FIG. 3, showing the origin positioning device in a state of being elevated from an elevating position.

FIG. 6 shows an example of a conventional plate material origin positioning device.

FIG. 7 shows another example of a conventional plate material origin positioning device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate processing machine 3 body frame 5 lower frame 6 side frame 7 upper frame 9 die block 11 punch block 13 nut member 15 ball screw 17, 19 bearing 21 drive motor for Y axis 23 ram unit 25 ram drive unit 27 U axis drive Motor 29 Power transmission means 31 V-axis drive motor 32 Ball screw 33, 35 Work table 34 Opening 37 First positioning device 39 Second positioning device 41A, 41B Clamp base 55 X-axis carriage 79A, 79B Guide rail 101 Origin positioning device 103 X-axis reference block 105a, 105b Y-axis reference block 107 Cylinder mounting member 109 Retraction cylinder 111 Rotary shaft 113 Bearing 115a, 115b Pin 117 Tension spring 119 Piston rod 1 21 Bracket 123 Bolt 125 Guide Block 127 Elevating Cylinder 128 Clamping Means 129 Cylinder Bracket 131 Piston Rod 133 Clamp Base 135 Bolt 137 Guide Rod 139 Bolt 141u Upper Arm 141d Lower Arm 143 Clamp Lever 145 Hinge Pin 147 Upper Clamp Nail 149 1 Lower Clamp Nail 153 Rotating shaft 155 Clamp cylinder 159 Slotted hole PL Pass line W Workpiece

Claims (3)

[Claims] 1. A work table comprising clamp means capable of gripping an end portion of a workpiece, provided below the work table, and an elevating cylinder for driving the clamp means so as to be able to protrude and retract from an opening provided in the work table. A plate material origin positioning device for a plate material processing machine, wherein a retracting cylinder that is driven horizontally in the direction of the origin is provided. 2. The apparatus according to claim 1, wherein said clamp means includes a clamp base which can be moved up and down by said elevating cylinder, and said end of said workpiece enters said clamp base. A clamp lever provided with a U-shaped space comprising a possible upper arm and a lower arm, the clamp lever being pivotally supported on the clamp base, and an upper clamp nail provided on the upper arm on the clamp base. A lower clamp nail for holding the workpiece in cooperation with the clamp base, and a clamp cylinder for swinging the clamp lever below the clamp base is provided. 3. A plate material origin positioning device for a plate material processing machine according to claim 1, wherein said retracting cylinder has a support member fixed to said work table below said work table, said support member being provided with said support member. Along with the retractable cylinder provided on the provided shaft so as to be horizontally rotatable,
A spring for applying tension in a direction substantially 45 degrees to the X-axis direction of the sheet processing machine between the support member and a rear portion of the drawing cylinder. .