JPH04123820A - Upward molding die for punching - Google Patents

Abstract

PURPOSE:To form the upward flange higher than an up-to-date height by providing a device for which moves up and down in the lower die holder and moving the lower die up and down. CONSTITUTION:When the lower end surface of n ejector plate 29 comes in contact with the upper end surface of a 1st holder component 19A, the projecting surface part 37 of a cam 35 as the device moving up and down is pressed, this cam 35 turns in the counter-clock wise direction, the lower die 27 is pushed upward by a projecting surface part 39. As a result, the upward flange forming work is started at the circumferential edge part of the hole H which is formed on the work W since the time when the ejector plate 29 is pushed down. Further, the upward facing flange is formed on the work W by moving the lower die 27 in the upper direction and moving the upper die 15 upward against the energized power of an elastic component 13 by its moving amount. By providing the cam 35 as the device moving up and down in the 2nd holder component 19B of the lower die holder, and making the lower die 27 movable freely up and down, the die space is made two times, and the height of the flange can be made two times high that of the up-to-date height.

Description

[Detailed Description of the Invention] [Object 1] (Industrial Application Field) This invention is directed to forming an upward flange at the peripheral edge of a hole formed in a workpiece using a punch press such as a turret punch press. The present invention relates to an upward forming die for punching.

(Prior Art) Conventionally, a punch press such as a sauce/soto punch press includes upper and lower turrets rotatably supported by upper and lower frames, respectively. A plurality of punches are mounted on the circumference of the upper turret, and dies corresponding to the punches are mounted on the circumference of the lower turret.

One of the plurality of pairs of punches and dies is fitted with a part of an upward forming die for forming a flange around the peripheral edge of a hole formed in the workpiece, and is attached to the lower turret to form a flange. Molding weighting is being carried out. In addition, the conventional upward forming mold had a structure in which the downward movement of the press was simply stroked to form a flange.

(Problems to be Solved by the Invention) Incidentally, the height of the upward flange was dependent on the cutting space of the press. In other words, it is necessary to satisfy the material feeding space (the range in which the workpiece can move) and the mold space, which is the distance between the lower surface of the upper turret and the "-" surface of the ejector plate that is part of the die device mounted on the lower turret. There was a problem in that the height of the flange was restricted and only short products could be produced.

The purpose of this invention is to improve the problem mentioned above by providing an upward-facing punching tool that allows the flange height to be formed larger than before while maintaining the same die space (mold space) as before. Our goal is to provide molds.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the object described in -, the present invention provides a method for forming a flange on the peripheral edge of a hole formed in the cotton.
Consisting of a heavy mold that can freely move within the mold guide and a lower mold that can freely move downward within the lower mold holder, it is always above the lower mold holder in two directions. (; An ejector plate into which a lower mold is inserted is provided, and when this ejector plate is pushed toward the other side, the lower mold is moved to one side and the ejector plate returns to its original position.) A heavy lowering device was provided in the lower mold holder to move the lower mold downward [7 times] when the lower mold was pressed, thereby constructing a -L-oriented forming mold for punching.

(Function) By adopting the punching mold of the present invention, when a workpiece with holes formed in advance is placed on the lower mold and the upper mold guide is lowered, the upper mold guide After contacting the ejector plate, when the upper mold guide is further lowered, the ejector plate is pushed down against the force and is installed in the lower mold holder.
- The immobilization device is actuated to move the lower mold upward. As a result, a flange is formed at the periphery of the hole previously formed in the workpiece by the cooperation of the upper mold and the lower mold.

Therefore, the height of the flange was increased by the amount of descent of the ejector plate in the past, but now the height of the flange is increased by taking into account the amount of movement of the lower mold upward by the upper drive device. .

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, for example, a turret punch press as a punch press has a -L section (not shown).

A lower frame is provided, and a two-part turret 1 and an upper turret 3, which are rotatable, are supported on the -L and D part frames 11. Furthermore, the upper turret 1 and the lower turret 3 are rotated synchronously by a known drive device.

A plurality of upper mold devices are attached to the circumference of the F section turret 1, and a plurality of upper mold devices are attached to the circumference of the F section turret 1 at positions corresponding to the heavy mold devices 1': Mold equipment is installed. Among these plurality of -Ix+" lower mold devices, in FIG. It is attached to the lower turret 3.

That is, a stopper type guide 1 is mounted in the mounting hole 9 of the upper turret 1 so as to be vertically movable by a well-known striker (not shown). An upper mold 15 is provided inside the upper mold 1 and is constantly urged downward by an elastic member such as rubber or a spring.

On the other hand, the upper mold device 7 is located in the mounting hole of the lower turret 3.
One lower mold holder, which forms part of the mold holder, is attached.

This one lower mold holder consists of a first holder portion 19A and a second holder portion 1.9B, and the axial center of the first holder portion 19 is provided with a hole that penetrates in the downward direction. A through hole 21 is formed at the bottom of the through hole 21.
A larger stepped groove 23 is formed. In addition, the second holder member]-9B has a plurality of four-part grooves 2 that are open at the top.
5 is formed.

A lower mold 27 that is vertically movable is attached from below to the through hole 21 penetrated by the first holder part +4' 19A,
A flange portion 27F formed at the lower part of the lower mold 27 is attached to the stepped groove 23.

An ejector plate 29 is provided above the first holder member] 9A, and this ejector plate 29
A through hole 31 penetrating in the vertical direction is formed in the axial center of the shaft. A step groove 33 larger than the through hole 31 is formed in the lower part of the through hole 31, and when the step groove 33 is lowered, the flange 11 formed on the second part of the first holder member 1.9A, 9 It is designed to engage with F.

A cam 35, for example, as a lowering device is provided in each concave groove 25 formed in the second holder portion 19B. The cam 35 has a semicircular shape inscribed in the bottom and left and right inner surfaces of the four-part groove 25, and has symmetrical convex portions 37 and 39 protruding from both ends of the upper surface in the inner and outer directions.

The first holder part shrines 1 and 9 corresponding to this convex surface part 37
A through hole 41 penetrating in the vertical direction is formed at the position A, and each through hole 41 has an ejector bin 4 screwed to the ejector plate 29 and protruding downward.
3 is attached and can freely slide in the vertical direction.

Moreover, the lower end surface of this ejector bin 43 is connected to the cam 3.
It is in contact with the convex surface portion 37 of No. 5. Further, the convex surface portion 39 of the cam 35 is in contact with the lower end surface of the lower mold 27.

The first holder part +4' 19 A and the second holder part shrine 1
Through holes 45 and 47 are formed at the same position in each of 9B, and a bolt 49 is inserted through the through hole 47 into the ejector plate 29 corresponding to the through hole 45, so that the tip of the bolt 49 is threaded. has been done.

An elastic device 57 in which an elastic member 55 such as rubber or a spring is interposed between the plates 51 and 53 is provided below the second holder portion In' 19B. The plate 51 is always in contact with the lower end surface of the second holder member 19A. Also, play 1-
51. ．． Through holes 59 and 61 are formed in the same position of 53 and pass through in the vertical direction, and a bolt 63 is inserted from below the through hole 61, and this bolt 63 connects the first holder member 19A and the second holder part. It integrates the moon 19B. Moreover, the head 63'F of the bolt 63 is the bullet 53.
The plate 53 is fitted into a groove 65 formed at the lower part of the through hole 61 to prevent the plate 53 from falling downward.

A through hole 67.69 is formed in the axial center of the second holder member 1.9B and the plate 51, and the bolt 71 is inserted from below the through hole 69. is screwed into the lower mold 27 with a screw II. Moreover, a spring 73 is interposed between the head of the bolt 71 and a groove formed in the lower part of the second holder part hoist 1.9B, and this spring 73 is always directed downward (-J force). The lower end surface of the lower mold 27 is brought into contact with the upper end surface of the second holder member 19B.

With the above configuration, the work W is placed on the lower mold 27 so that the center of the hole H formed in advance is located at the axis of the lower mold 27.

In this state, the upper mold guide 11 is pushed away by a striker (not shown), and the upper mold guide +:11. The upper mold 15 comes into contact with the ejector plate 1-29 and the lower mold 27, respectively, and clamps the work W. Further, when the upper mold guide 11 is pushed down, the ejector plate 29 is pushed down against the (J force of the elastic member 55, and the lower end surface of the ejector plate 29 abuts one end surface of the first holder member 19A. At the same time, the ejector bin 43 is also pushed down and presses the convex part 37 of the cam 35 as a vertical movement device, and the cam 35 rotates in the counterclockwise cutting direction. "Against the A-1 force" and is pushed up into gravity.

As a result, from when the ejector plate 29 is pushed down, upward flange forming is started on the peripheral edge of the hole H formed in the workpiece W, and the lower mold 27 moves upward, and the upper mold 15 is the amount of movement of the elastic member 13
The upper flange is formed by being lifted up against the force of 1 and 2, and the upward flange is formed into the state shown in FIG.

After this upward flange is formed, when the upper mold guide 11 is raised in the state shown in FIG. The cam 35 is lowered by the biasing force, rotates in the π1 direction, and is returned to its original state as shown in FIG.

Therefore, the lower end surface of the turret l-1 and the lower mold 2
7" in the same state as the conventional one, the second holder member 19B which is the lower mold holder
A cam 35, which is a vertical movement device, is installed in the lower mold 27.
Since the holder part can be moved upwardly by °C with respect to the holder part 19A, the mold space can be doubled, for example, and the flange height can be made twice as high as that of the conventional one.

Note that this invention is not limited to the embodiments described above, and can be implemented in other forms by making appropriate changes. In addition, the cam 3 which is a lowering device
By changing the shape and size of 5, the flange height can be freely changed from the conventional height to twice the height.

[Effects of the Invention] As understood from the description of the embodiments above, according to the present invention, since the structure is as described in the claims, a vertical movement device is provided in the lower mold holder. By making the lower mold move up and down with respect to the lower mold holder, it is possible to create an upward flange on the periphery of the hole pre-formed in the workpiece in the same condition as the mold space. can be molded higher than the conventional height.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a bidirectional forming die according to an embodiment of the present invention attached to the turret of a turret punch press, and Fig. 2 is a sectional view of the periphery of a hole preformed in a workpiece.
It is an explanatory view of the operation in a state where the orientation flange is molded. 1... Upper turret 3... Lower part 1 knot 5... Upper die device 7... Lower die device 11... Upper die guide 13... Elastic part hand (15... Upper die mold
19...To "Mold Boulder 19 A...1st
Holder member 19 B・Second holder part shrine 25・・Concave groove 27・・
・Lower mold 29...Ejector play I-] 2 35...Cam (vertical movement device) 3...Ejector pin 5...Elastic part 1...Spring

Claims (1)

[Claims] The lower mold consists of an upper mold that is movable up and down within the upper mold guide to form a flange around the periphery of the hole formed in the workpiece, and a lower mold that is movable up and down within the lower mold holder. An ejector plate is provided above the holder that is always urged upward and into which the lower mold is inserted, and when this ejector plate is pushed down, the lower mold is moved upward and the ejector plate returns to its original position. An upward forming die for punching, characterized in that a vertical movement device for moving the lower die downward when returned is provided in the lower die holder.