JPH031145Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cutting device that cuts materials such as shaped steel materials and pipe steel materials.More specifically, it is equipped with a material width adjustment mechanism using a movable die, and can handle from width adjustment to cutting of the material with one stroke of the press ram. This invention relates to a cutting device.

In conventional press machines, the position of the material is set in advance so that one side of the material is pressed against the reference surface.
The material is cut by the vertical movement of the punch. In this case, accurate cutting will not be possible unless the operator positions the material reliably.
They wanted a machine that would allow them to position the material themselves.

This invention was made in view of such conventional problems, and it provides a transmission means that moves the movable die forward and backward with respect to the fixed die in conjunction with the lifting and lowering movement of the punch, so that the width of the material can be brought together. To provide a cutting device that can perform the process of adjusting the width of a material and cutting it with one stroke of a press ram, and can cut the material with high precision even if the width of the material varies.

Examples will be described in detail below. FIG. 1 shows the entire press machine used in one embodiment of this invention. The press 1 includes a mold assembly 1 having a punch part 7 and a die part 9 in a recess 5 of a frame 3.
1 is attached, and the press ram 13 is lowered by a drive means not shown in the figure to lower the mold assembly 1.
The punch part 7 of No. 1 is pressed.

A cutting device according to an embodiment of this invention is used for the die assembly 11 of the press machine 1 as described above, and is shown in detail in FIGS.

The punch portion 7 of the mold assembly 11 is constructed by attaching a thick punch 15 to a punch holder 17 via a punch holder 19. On the other hand, the die part 9 is configured by fixing a fixed die 23 to a die holder 21 and holding a movable die 25 slidably so as to move forward and backward relative to the fixed die 23.

This die holder 21 has four guide posts 27.
It is a book stand, a spring 29 is placed around each guide post 27, and the punch holder 17 is placed on top of the spring 29. Therefore, the punch holder 17 is supported vertically movably relative to the guide post 27, and the punch holder 17 is supported by the press ram 1.
3, the punch 15 can descend toward the die part 9.

Further, the configuration for driving the movable die 25 is as follows. The flange portion 35 at the upper end of the bolt holder 33 is engaged with the flange engagement hole 31 of the punch holder 17, and the bolt holder 33 is suspended from the punch holder 17. Bolt 3 inserted into this bolt holder 33 so as to be able to move up and down
A vertical mover 39 is screwed to the lower end of 7.
Further, a spring 41 is placed around the bolt 37 to constantly urge the vertical mover 39 downward. The stroke of this vertical mover 39 is set shorter than the stroke of the punch 15.

The vertical mover 39 has a U-shaped groove 4 that opens in the horizontal direction.
3 is provided, and a cam follower 47 attached to one end of the sector gear 45 is fitted into this U-shaped groove 43. This sector gear 45 is supported by a shaft 49. A tooth portion 51 at the other end of the sector gear 45 is meshed with a gear 53. A rotating shaft 55 of this gear 53 is rotatably supported by a support block 57 fixed on the die holder 21. A locking protrusion 59 is provided at the other end of the rotating shaft 55, and a push bolt 61 as a push element is provided.
It engages with the groove 63 on the end face of. This push bolt 61 is screwed into a screw hole 67 of a transmission block 65, and its tip abuts against the end surface of the movable die 25.

The distal end surface of the movable die 25 is in pressure contact with a return spring 71 interposed between the movable die 25 and the die frame 69. The fixed die 23, the movable die 25, and the die frame 69 are mounted on the die base 73, and the die holder 2
1 by means of a key 75. The die portion 9 may be provided with a handle so that it can be replaced as an assembly.

The operation of the cutting device having the above configuration will be described next. In the initial state, the punch holder 17 is moved against the die holder 2 by the force of the spring 29 of the guide post 27.
It is in a position separated from 1. In this state, the material W is inserted between the punch 15 and the dies 23, 25, the press ram 13 is driven, and the punch holder 17
descend.

As the punch holder 17 descends, the vertical mover 39
The cam follower 47 is also lowered to drive the cam follower 47. This movement of the cam follower 47 rotates the sector gear 45, causing the gear 53 and its rotation shaft 55 to rotate. When the rotating shaft 55 is rotated, the movable die 25 is pushed relative to the fixed die 23 while the push bolt 61 rotates due to the movement of the locking protrusion 59. In this way, the material W is first aligned between the fixed die 23 and the movable die 25. After this, the punch holder 17 is also lowered, and the punch 15 cuts the material W. At this time, the remainder of the stroke of the punch holder 17 is absorbed by the spring 41 to prevent the movable die 25 from moving excessively.

When the press ram 13 rises after cutting the material W, the punch holder 17 is pushed up to its original position by the force of the spring 29. In addition, the movable die 25
slides and returns to its original position by the force of the return spring 71.

In this way, this cutting device performs the steps of aligning the width of the material W and then cutting it with one stroke of the press ram.

5 to 7 show reference examples. This reference example is characterized by a stepped cam 77 for width adjustment that is vertically disposed from the punch holder 17. This cam 77 is provided with a step by a sloped surface 79, and the movable die 81 engaged with this cam 77 is moved forward and backward relative to the fixed die 83 by raising and lowering the cam 77. Therefore, punch holder 1
7 comes down, the movable die 81 presses the tubular material W against the fixed die 83, and in this state the punch 15 acts to cut the material W into a V-shape.
The return bolt 85 is fixed to the movable die 81 by the spring 87.
The movable die 81 is pulled in a direction in which it comes into pressure contact with the cam 77, and after the cam 77 is raised, the movable die 81 is pulled back to its original position.

As can be understood from the above description of the embodiments, in short, the present invention includes a fixed die 23 on one side of a recess formed in the die holder 21, and presses the workpiece W against the fixed die 23 on the other side of the recess. The fixed die 23 and the movable die 2 are attached to a punch holder 17 which is slidably provided with a movable die 25 to be fixed and which is provided above the die holder 21 so as to be movable up and down.
The cutting device includes a punch 15 that shears the workpiece W in cooperation with the punch holder 17.
A vertical mover 39 supported vertically and movably is biased downward by an elastic member.
A presser 61 is provided on the die holder 21 and is movable in the horizontal direction in conjunction with the vertical movement of the presser 9.
This configuration is such that the movable die 25 is pressed and moved in the direction of the fixed die 23.

As is clear from the above configuration, in the present invention, the vertical mover 39 is supported by the punch holder 17 so as to be vertically movable, and the vertical mover 39 is urged downward by an elastic member. It is something that exists. The die holder 21 is provided with a presser 61 that presses the movable die 25 toward the fixed die 23, and the presser 61 moves horizontally in conjunction with the vertical movement of the vertical mover 39.

Therefore, according to the present invention, when the punch holder 17 is lowered to cut the workpiece W and the vertical mover 39 is lowered via the elastic member, the vertical mover 39
At this time, the presser 61 presses and moves the movable die 25 in conjunction with the downward motion, and the workpiece W is moved between the fixed die 23 and the movable die 2.
5, it is pressed and fixed. When the fixed punch holder 17 is further lowered, the fixed workpiece is cut.

In other words, the workpiece W is fixed using the punch holder 17.
The workpiece is cut in conjunction with the start of descent of the workpiece, and the workpiece is cut after the workpiece is fixed, and the workpiece W is not cut when the workpiece W is not fixed. It is.

Further, as described above, when the presser 61 presses the movable die 25 in conjunction with the vertical movement of the vertical mover 39, when the movable die 25 stops moving, the elastic member is compressed, and the punch holder 17
Since the downward movement of the die continues, even if there is a change in the width of the workpiece W, it can be easily handled and the die can be firmly pressed and fixed.

[Brief explanation of the drawing]

Fig. 1 is a side view of a press machine used in an embodiment of this invention, Fig. 2 is a side sectional view of an embodiment of this invention, Fig. 3 is a plan view of the same, and Fig. 4 is the same as the above. 5 is a partially cutaway front view of the reference example, FIG. 6 is a partially cutaway plan view of the same, and FIG. 7 is a side view of the same. 15...Punch, 17...Punch holder, 21
... Die holder, 23 ... Fixed die, 25 ... Movable die, 33 ... Bolt holder, 37 ... Bolt, 39 ... Vertical mover, 41 ... Spring, 4
3... U-shaped groove, 45... Sector gear, 47... Cam follower, 53... Gear, 59... Locking protrusion, 6
1... Push bolt, 67... Screw hole, 77... Cam, 79... Movable die, 81... Fixed die, W...
…material.

Claims (1)

[Scope of utility model registration request] A fixed die 23 is provided on one side of a recess formed in the die holder 21, and a movable die 25 that presses and fixes the workpiece W to the fixed die 23 is provided on the other side of the recess so as to be slidable. A cutting device is provided with a punch 15 that shears the workpiece W in cooperation with the fixed die 23 and the movable die 25 on a freely movable punch holder 17, and the punch 15 is supported on the punch holder 17 so as to be movable up and down. The vertical mover 39 is biased downward by an elastic member, and a presser 661 that is movable horizontally in conjunction with the vertical movement of the vertical mover 39 is provided on the die holder 21. A cutting device characterized in that the movable die 25 is moved in the direction of the fixed die 23 by pressing.