JPH05317972A - Step bending die device - Google Patents

Abstract

PURPOSE:To obtain the dies having desired high accuracy by inserting a spacer according to the plate thickness to be worked between the base body of a punch and a thrust receiving plate, vertically symmetrically disposing vertically working plates on the base bodies of the punch and a die and boring a Tee groove in the staircaselike groove bottom of the die over the entire length of the dies. CONSTITUTION:The spacer 5 is held between the thrust receiving plate 4 and the base body 3 of the punch. The punch plate 8 interposed with a punch block 10 and a spring is disposed on the base body 3 of the punch. The die plate 17 interposed with a die block 20 and a spring is disposed on the base body bored with the Tee groove over the entire length of the base body 13 of the die, transversely symmetrically with the punch, and in the position where the clearance between the punch block 10 and the die block 20 is equal to the thickness of the spacer to be held. As a result, the broad products are formed in the slight time for preparatory plans and since test bending is not needed, the useless consumption of blank materials does not arise. The saving of manpower and an economical effect are thus obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a press brake having a depth adjusting mechanism, and is intended for bending a metal plate having a thickness of 0.2 mm to 2.3 mm, and local processing is also possible. The present invention relates to a step bending mold apparatus suitable for obtaining a stepless arbitrary step size of 6 mm or less.

[0002]

2. Description of the Related Art Conventionally, a mold as shown in FIGS. 4 and 5 has been mainly used for bending a slight step, which is impossible in the two steps of V bending by a press brake. Since the height of the mold is fixed, it is not versatile and it was necessary to prepare a mold according to the step. Further, when the step height is set by the method shown in FIG. 5, it is difficult to obtain a spacer having a desired thickness and it is difficult to obtain a highly accurate step. I was giving up.

[0003]

Therefore, the present invention overcomes the above-mentioned drawbacks, and enables even an unskilled person to obtain a desired step difference with high accuracy by simple setup and operation. Further, there is a strong demand in the industry that the mold is a multifunctional product, and the invention was made to meet the demand.

[0004]

[Means for Solving the Problems]

(1) In order to achieve the above object, the present invention is a mold including an upper mold and a lower mold, which is mounted on a press brake having a depth adjusting mechanism, the upper mold being a mother body, a clearance setting spacer and Each of the upper die base body and the lower die base body, which is composed of a thrust receiving plate, is provided with a stepped groove in which a block and a vertically movable plate via an elastic body can be arranged symmetrically in the front-rear direction. A T-groove is bored over the entire length of the die on the bottom of the step-like shallow groove of the die, so that a block of a desired length can be attached to any position.
Also, the length from the back vertical surface of the upper mold block to the back vertical surface of the upper mold base and the length from the front vertical surface of the lower mold block to the back vertical surface of the lower mold base are equalized. .. (2) A plurality of conical recesses are provided in the vertically movable plate of the lower mold, and a plurality of pins can be simultaneously inserted into the recesses by the handle and the sliding rod connected thereto.

[0005]

[Operation] The operation of step bending of a metal plate using the mold of the present invention will be described as follows: (1) Contact with an upper die thrust receiving plate mounted with a spacer suitable for the plate thickness sandwiched therebetween. The lower die can be mounted, the metal plate to be processed can be placed at a predetermined position on the lower die to apply pressure, and the depth adjusting handle can be operated to obtain a desired step amount of 6 mm or less. Further, it is possible to attach a block having a length suitable for the working width to an arbitrary position of the T-groove, and to bend not only the entire length of the side but also a part of the side or a plurality of portions. (2) When the table is lowered or the ram is raised after pressurizing and molding is finished, when the molded shape is impaired due to the natural restoring force of the elastic body, the upward movement due to the natural restoration of the vertically movable plate It can be stopped manually.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the drawings. FIG. 1 shows a mold according to the present invention mounted on a press brake, in a state where pressurization is completed and a metal plate 29 is molded. It is a side view which shows the structure which added. On condition that the dimensions of 1 and 2 are the same, a clearance setting spacer 5 suitable for machining is sandwiched between the upper mold body 3 and the thrust receiving plate 4, and an elastic body is provided deep in the stepped groove 6. 7 and a vertically movable plate 8 below the strip 7, and a stripper bolt 9 of a length that allows the elastic body 7 to be appropriately compressed even when no pressure is applied.
The block 10 having the same length as the mold is screwed into the shallow groove with a bolt 11 and mounted on the ram 12 of the press brake body.

An elastic body 15 and a vertically movable plate 17 provided with a plurality of conical recesses 16 on the upper side thereof are inserted in the deeper direction of the stepped groove 14 of the lower mold body 13 and no pressure is applied. Even when the elastic body 15 is appropriately compressed, it is attached by a stripper bolt 18 of a length, and a block 20 of a desired length is moved to a desired position by a bolt 21 and a square nut 22 in a shallow groove having a T-shaped groove 19. Install. The pins 23 to be inserted into the plurality of conical recesses 16, the slide rods 24, the guides 25, and the handles 26 are respectively arranged on the lower mold body 13,
The lower mold body 13 is pressed against the thrust receiving plate 4, and is attached to the table 28 of the press brake main body with the bolt 27.

The upper die and the lower die constructed as described above are
Attached to the press brake with depth adjustment mechanism,
Explaining the procedure of bending in the actual place, (it is assumed that the spacer 5 fitted to the metal plate 29 to be the product is attached) is set to a shallow depth so that the upper die and the lower die do not come into contact with each other in advance. And then, the metal plate 2
9 is placed on the lower mold block 20 and the back gauge 3 of the main body
Abut on 0 and depress the pressure pedal to bring the upper mold and the lower mold close to each other. When the depth adjusting handle is turned in this state, the engagement between the upper mold and the lower mold deepens, and the step of the metal plate 29 gradually increases steplessly. When the desired step is reached, the depth adjusting handle is stopped. From now on, simply pressing the pressure pedal allows the product to be processed while maintaining its depth position. In addition, the metal plate 29 as a product has a very small plate thickness or a very short working width, and the lower elastic body 15 is formed.
If the molded shape is lost due to the restoring force of the plate 26, the handle 26 is operated to prevent the plate 17 from spontaneously returning, and the handle 26 is returned after the product is taken out. ..

[0009]

Therefore, by using the present invention,
Not only is it possible to process a wide range of products with a short setup time, but test bending is rarely required, so there is no waste of material, and when considered in terms of labor saving, a very economical effect can be obtained. Further, it is a great feature of the present invention that even a beginner can easily perform mold matching, which is considered to be difficult.

[Brief description of drawings]

FIG. 1 is a side view showing a state where bending is completed when the present invention is mounted on a press brake.

FIG. 2 is a plan view showing a part of a lower mold of the present invention.

FIG. 3 is a perspective view showing an example of processing the entire length and partial bending of a product according to the present invention.

FIG. 4 is a side view showing a conventional step fixing mold.

FIG. 5 is a side view showing a mold for replacing a spacer and setting a step amount according to a conventional technique.

[Explanation of symbols]

1 Length from the back vertical surface of the upper mold block to the back vertical surface of the upper mold base 2 Length from the front vertical surface of the lower mold block to the back vertical surface of the lower mold base 3 Upper mold base 4 Thrust receiving plate 5 Spacer for setting clearance 8 Upper plate 10 Block of upper mold 12 Ram of press brake body 13 Base of lower mold 16 Conical recess 17 Lower plate 20 Lower block 23 Pin 24 Sliding rod 25 Guide for supporting sliding bar 26 Handle 28 Table of press brake main body 29 Metal plate (product) 30 Back gauge of pre-spray main body

Claims (2)

[Claims] 1. A spacer is sandwiched between a thrust receiving plate and a mother body of an upper die, and a plate having a block and an ammunition is disposed on the mother body of the upper die, and a T groove is formed in the entire length of the mother body of the lower die. Dispose the plate with the block and the ammunition on the installed base body symmetrically with respect to the upper mold and at a position where the clearance between the upper mold block and the lower mold block is equal to the thickness of the sandwiched spacer. Set up. A step bending mold device configured as described above. 2. A lower mold base is provided with a plurality of conical recesses on a side surface of the lower mold plate and a plurality of guide holes penetrating the lower mold base, and a pin having a conical tip is inserted into the guide hole. A mechanism that allows a plurality of pins to be manually moved in and out of the plurality of conical recesses at the same time by connecting a sliding rod having a recess that moves in the longitudinal direction of the lower mold and a lever-type handle on the side surface of the sliding rod. The step bending mold device according to claim 1, which is added.