JPS62248518A - Rocking die in bending machine - Google Patents

Abstract

PURPOSE:To prevent the generation of the flaw on the surface of a work piece and to improve the working efficiency by displacing the rocking body of the top die used for the box-bending of the peripheral side of a metal plate by interlocking with the ascent and descent of a top die holder. CONSTITUTION:A rocking body 27 and abutting body 71 are always projecting. A top die holder 19 is descended, the abutting body 71 is first abutted to a bottom die 13R, interlocked via a connection shaft 93B and a rocking body 27R is rotated to he upper part as well. At the time when a work piece is fixed by being held with the bottom die 13R and top die 25R the lower face of the rocking body 27R is coincided with the lower face of the top die 25R. After completion of the bending work by the ascent of a bend beam 35 the holding fixture of the work piece is released by lifting the top die holder 19, but the rocking body 27R rocked and descended by a interlocking device 45R according to the ascent of the abutting body 71. Consequently the rocking body can be isolated without rubbing the lower face by avoiding the interference with the flange part and narrowing the between the right and left both ends more than the plate stock surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a swinging die in a bending machine, and more specifically to a top die used for box-bending the periphery of a metal plate, for example. The present invention relates to a swing mold in a bending machine that displaces a swing part in conjunction with the elevation of a top die holder.

[Technical background of the invention and its problems] Conventionally, in a device for bending a plate material, such as a bending machine, the shape of a top die used to box-bend the periphery of a metal plate is as shown in Fig. 7. and as shown in FIG.

A top die 20 supported by a top die holder 201 is attached to a workpiece W whose both sides have been processed into a channel shape.
The top die 205 at both ends of 3 includes a rocking body 207,
This rocking body 207 is rotatably mounted via a pin 209.

The oscillating body 207 rotates in the direction of the arrow due to its own weight or a spring, and the rotation is stopped by a stopper 211 at the position shown in FIG. be stopped. In this state, the top die holder 201 is lowered and the workpiece W is pressed and fixed at the position shown in FIG. At this time, the lower surfaces of the oscillator 207 and the top die 203, 205 form a straight line, and the tip 213 of the oscillator 207 is configured to contact a corner 215 of the channel-shaped workpiece W.

However, in the conventional swinging mold, when pressing and fixing the workpiece W, the tip 213 of the 18-moving body 207 always moves while sliding on the surface of the workpiece W.

As a result, silver paper was generated on the surface of the workpiece, making it impossible to obtain a high-quality product.

Further, after completing one process, when moving to the next process, it is necessary to raise the tip of the oscillator provided on the top die until it separates from the surface of the workpiece. This is to prevent silver paper from being attached to the surface of the workpiece when the workpiece is transferred for processing in the next process.

Although not shown in the drawings, there is also an example in which a roller is provided at the tip of the oscillating body 207 described above as an example of improving the above-described problem.

In this case, if the height of the box-bent channel portion is low due to the roller diameter, the rollers will come into contact with it and it cannot be used.

Furthermore, since the roller surface is always in contact with the workpiece surface when the workpiece is transported, silver paper is generated on the workpiece surface, making it impossible to obtain a high-quality product.

Therefore, in either case, the current problem is that a lot of working time is required and it is not possible to improve working efficiency.

[Purpose of the invention] The present invention has been devised in view of the above-mentioned problems.

Therefore, an object of the present invention is to improve product quality and work efficiency by displacing the swinging part of the top die used for box-bending the periphery of a metal plate in conjunction with the lifting and lowering of the top die holder. An object of the present invention is to provide an oscillating mold for a folding machine.

[Means for Solving the Problems] In order to achieve the object, the present invention has the following configuration.

That is, in the swinging mold of the bending machine according to the present invention, a plate material placed on a bottom die is pressed and fixed by a top die attached to a top die holder that can be raised and lowered, and is moved from the die by a bend beam that is supported so as to be able to move up and down. A bending machine of a type that bends the free edge of a protruding plate material, comprising a rocking body provided at a lower part of the top die so as to be able to protrude laterally,
An interlocking mechanism is provided to move this rocking body to move up and down the top die holder, thereby allowing the rocking body to swing freely.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

For example, a bending machine embodying the present invention shown in FIGS. 5 and 6 will be generally described.

The frame 3 that constitutes the bending machine 1 includes a base 5 and left and right side frames 7 vertically erected from both sides of the base 5.
．． 9 and upper beam members 11F, 1 whose left and right ends are supported by the upper part of the side frame 7.9 and are spaced apart from each other in the front and rear.
It is composed of 1R, etc.

Further, it is fixed to a plurality of die support plates 15F, 15R whose left and right end portions from the front and rear bottom dies 13F, 13R are connected to the side frame 7.9.

The bottom dies 13F and 13R support the workpiece W, and sensors 17F and 17F are provided on appropriate front and rear surfaces of the bottom dies 13F and 13R to detect the width of the workpiece W, respectively.
A plurality of 7Rs are arranged at appropriate intervals.

Further, a top die holder 19 is disposed above the bottom dies 13F and 13R so as to be movable up and down by an elevating cylinder 21.

Top dies 23F, 23R and 25F, 25R are detachably attached to the front and rear of the lower surface of the top die holder 19, respectively, for press-fixing the workpiece W to the bottom dies 13F, 13R, as described later. . This top die 23F, 23R and 25F, 2
5R is a plurality of divided pieces of appropriate dimensions,
Top dies 25F and 25R are used in combination with appropriate length dimensions depending on the width dimension of the workpiece W, and are provided at both ends.
is equipped with rocking bodies 27F and 27R on its lower surface.

The workpiece W is cut into the bottom die 13F by the top dies 23F, 23R, 25F, and 25R.

13R, a plurality of pressing cylinders 29F, 29R are provided on the lower surface of the upper beam members 11F, 11R to prevent the top die holder 19 from curving in an upwardly convex manner due to the reaction force of the workpiece W. Attach them at appropriate intervals. And on the top surface of the top die holder 19,
A plurality of rotary actuators 31F and 31R are attached to each pressure cylinder 29F and 29R. Mounted on the rotating shafts of the rotary actuators 31F and 31R are chevron-shaped movable blocks 33F and 33R that are movable to positions directly below the pressing cylinders 29F and 29R and to positions away from directly below the suppressing cylinders 29F and 29R. It is.

Therefore, the corresponding 0-taly actuator 31F is activated by the actuation of the sensors 17F and 17R.

Only the movable block 31R operates, and only the movable blocks 33F and 33R at the position corresponding to the workpiece W operate the suppression cylinder 29.
It will be located directly below F and 29R.

Pend beams 35F, 3 are provided inside the bottom dies 13F, 13R in order to upwardly bend the edge portions of the workpieces W press-fixed to the bottom dies 13F, 13R by the top dies 23F, 23R, 25F, 25R.
5R is provided so as to be able to move up and down. The pend beams 35F, 35R are supported by eccentric shafts 37F, 37R,
The eccentric shafts 37F and 37R are rotated by the expansion and contraction of the bending cylinders 39F and 39R, and the top die 23F is rotated.

Bottom die 13F, 1 by 23R, 25F, 25R
The edge portion of the workpiece W pressed against 3R is bent upward.

At the time of this bending, horizontal guide members 43F, 4 supported by guide portions 41 that direct the pend beams 35F, 35R in the direction of the top dies 23F, 23R, 25F, 25R.
3R is attached to the lower surface of the top die holder 19 so as to be vertically adjustable.

Note that an interlocking mechanism 45F displaces the positions of the rocking bodies 27F and 27R provided on the top dies 25F and 25R in conjunction with the lifting and lowering of the top die holder 19.

45R is provided.

Next, the interlocking mechanism 45R of the swinging mold according to the present invention will be explained in detail with reference to FIGS. 1 to 4.

Note that although the drawing shows the swinging mold on the rear side in the direction of plate material movement, the same applies to the swinging mold on the front side (they have the same mechanism).

The swinging mold with a movement function has a swinging body 27 provided at the bottom.
R is supported by a connecting piece 51 connected to a shaft 49 provided with a rack 47. The lower end of the connecting piece 51 is swingably supported by the swinging body 27R and the bin 53, and the upper end by the shaft 49 and the bin 55.

The shaft 49 can move up and down inside a guide hole 57 that perpendicularly penetrates the top die 25R.
9, and a plurality of guide rollers 61 provided on the top die 25R serve to prevent rotation and also enable smooth lifting and lowering.

A rack 47 is provided on the surface of the shaft 49 opposite to the guide surface 59, and the small gear 63 that meshes with the rack 47 has both ends connected to the top die through bearings 65 (see FIG. 3) and 67.
It is rotatably supported by 5R.

On the other hand, a block 69 containing a drive mechanism for operating the swinging body 27R by raising and lowering the top die 19 is fixed to the side surface of the top die 25R.

The block 69 is divided into two parts to incorporate the drive mechanism.
It is formed of a block 69a and a block 69b, and is configured to be fixed with a fastener or the like.

The block 69 is connected to a shaft 77 by a connecting bolt 75 through a plurality of plate springs 73 housed in an abutting body 71 protruding from the lower surface of the block 69, and the plate spring 73 connects the lower end of the shaft 77 to the stepped portion of the abutting body 71. 79, the abutting body 71 is always urged in the projecting direction (downward in FIG. 1).

Note that the shaft 77 is a guide hole 8 that passes through the block 69 perpendicularly.
The block 69 can be moved up and down freely within the block 69, and has a guide surface 83 in the shape of an occluded circle, and a plurality of guide holes 561 provided in the block 69 also serve to prevent rotation and enable smooth up and down movement.

A rack 85 is provided on the opposite surface of the shaft 77 from the guide surface 83, and a large gear 87 that meshes with the rack 85 is rotatably supported by the block 69 via bearings 89 at both ends.

Furthermore, a small gear 91 provided coaxially and adjacent to the large gear 87 meshes with a rack 95 provided on the connecting shaft 93A.

The connecting shafts 93A, 938, 930, and 93D intersect at right angles to each other at a distance from the shafts 49 and 77,
The connecting shaft 93A is attached to the block 69, the connecting shaft 93B is attached to the top die 25R adjacent to the block 69, the connecting shaft 93G is attached to a plurality of top ties 23R (one piece is shown in the drawing), and the connecting shaft 93B is attached to the top die 25R adjacent to the block 69. 93D is inserted through the top die 25R.

The connecting shaft 93A has a guide surface 97 on the opposite surface of the rack 95.
A guide 0-561 provided on the block 69 serves to prevent rotation and facilitates smooth movement in the left and right direction.

A flange 99 is provided at the tip of the connecting shaft 93A (left side in FIG. 1), and a spring 101 is installed between this 7 langes 99 and the side surface of the block 69, so that the small gear 91 and the large gear 87 are always connected to the connecting shaft 93A. The intervening shaft 77 is urged in the protruding direction (downward direction in FIG. 1).

A stopper bolt 105 is attached to a nut 107 on a bracket 103 protruding from the side of the block 69 for adjusting the protrusion limit.
It can be adjusted freely depending on the setting.

The connecting shaft 93B connects the top die 2 holding the block 69.
5R and connected to the aforementioned rocking body 27R.
9 and the rank 1 provided on the connecting shaft 93B.
09 can be interlocked by a small gear 63 that meshes with the 09 at the same time.

Further, a guide surface 59 is provided on the opposite surface of the rank 109, and the guide roller 61 provided on the top die 25R serves as a rotation stopper and is movable in the left and right direction.

Further, the connecting shaft 93B has a seven flange 111 at its end on the block 69 side, and is always urged by a spring 113 so as to come into contact with the M-connection shaft 93A.

The connecting shaft 93G has a plurality of top dies 23R (one in the drawing) with a spring 115 installed in a hole 117 provided in the top die 23R, and a spring 115 installed in a hole 117 provided in the connecting shaft 93C.
It abuts against the flange 119 and is always urged to abut against the connecting shaft 93B.

Further, the connecting shaft 93D passes through the top die 25R and is attached to the rack 49 provided on the shaft 49 connected to the above-mentioned rocking body 27R.
7 and a small gear 63 that meshes with the rank 109 provided on the connecting shaft 93D at the same time.

Further, a guide surface 59 is provided on the opposite surface of the rack 109, and the guide roller 61 provided on the top die 25R serves as a rotation stopper and is movable in the left-right direction. This configuration is the same as that of the connecting shaft 93B.

Further, a flange 121 is provided on the rear end (right side in FIG. 1) of the connecting shaft 93D, and a spring 125 is installed between the end plate 123 provided on the side surface of the top die 25R and the 7 langes 123, and It is always biased toward the shaft 93C.

With the above structure, the operation is such that the rocking body 27R and the abutment body 71 normally protrude at the position shown by the chain line in FIG.

The top die holder 19 descends and transfers the plate material placed on the bottom die 13R to the bottom die 13R and top die 23R, 2.
When holding and fixing in cooperation with 5R, the abutting body 71 comes into contact with the bottom die 13R before the swinging body 27R due to the lowering of the top die holder 19.
is retracted, and in conjunction with this, the rocking body 27R also rotates upward.

At the workpiece holding/fixing work limit, the lower surface of the swinging body 27R coincides with the lower surface of the top die 25R.

After the bending work is completed by raising the pend beam 35, the workpiece W is lifted by raising the top die holder 19.
However, as the abutting body 71 rises, the interlocking mechanism 45R swings the swinging body 27R downward. Thus, as shown in FIG. 7, the oscillator 207 can be separated from the plate surface without rubbing the lower surface by making the width between the left and right ends narrower than the plate surface, thereby avoiding interference with the flange portion.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the gist of the present invention.

For example, a method may be considered in which the top die provided in the middle is not provided with a transmission mechanism for displacing the rocking body, and the displacement of the top die holder is transmitted to the top dies at both ends to move the rocking body up and down.

[Effects of the Invention] As described above, the present invention provides the detection body, and allows the rocking body to be moved up and down via the interlocking mechanism in relation to the up and down movement of the top die holder. Therefore, even if the height of the channel portion of the box-bent board is low, the rocking body can be separated from the surface of the board when the board is transferred, and no silver paper is attached to the surface of the board.

Therefore, the quality of the product is improved, and since conventional work steps can be omitted, work efficiency can be improved.

[Brief explanation of drawings]

1 to 4 show a swinging mold and an interlocking mechanism according to the present invention, and FIG. 1 is a sectional view taken along the line I-I in FIG.
The figure is a plan view including a partial cross section of FIG. 1, FIG. 3 is a sectional view taken along the ■-■ arrow in FIG. 1, FIG. 4 is a sectional view taken along the rV-IV arrow in FIG. 6 and 6 show a folding machine embodying the present invention, FIG. 5 is a front view, and FIG.
A cross-sectional view taken along the Vl arrow, and FIGS. 7 and 8 are operation explanatory diagrams showing a conventional example. Explanation of the symbols representing the main parts of the drawings 13F, 13R...Bottom die 19...Top die holder 23F, 23R...Top die 25F, 25R...Top die 27F, 27R...Rocking bodies 45F, 45R ...Interlocking mechanism Figure 3 Figure 4 Figure 7Ii! ! l Figure 8 Figure 5 Co Figure 6

Claims (1)

[Claims] In a type of bending machine in which a plate placed on a bottom die is pressed and fixed by a top die attached to a top die holder that can be raised and lowered, and the free edge of the plate that protrudes from the die is bent by a bend beam supported so as to be movable up and down. , the bending method is characterized in that a rocking body is provided at the bottom of the top die so as to be able to protrude laterally, and an interlocking mechanism is provided for swingably displacing the conductor in conjunction with the raising and lowering of the top die holder. Swinging mold in machine.