SU1133002A2 - Progressive die - Google Patents

Abstract

STAMP SERIOUS ACTION on author. St. No. 604609, characterized in that, in order to improve the accuracy of the parts produced, at least one punch is penetrative and the stamp is provided with at least one safety device installed on one plate with a penetrative punch and on an axis parallel to the direction of movement of the material, rotatably in a vertical plane parallel to the direction of movement of the material and spring-loaded in the direction of movement of the material. S cl 00 with to

Description

The invention relates to the processing of metals by pressure, in particular to dies for processing sheet material.

From the main auth. St. No. 604609 is known to have a successive stamp containing punches and at least one stepping stop and one stepping knife, made with at least one protrusion with cutting edges, one of which is a continuation of the edge of the stepping knife. The knife protrusion is placed, from the side of the material supply and its cutting edge, is a continuation of the cutting edge of the stepping knife, parallel to the direction of the material feed. Facing one another surface of the step support and the step knife are made beveled and interacting with each other, and the step support is provided with a spring returning it to the initial position 1.

The disadvantage of this stamp is the possibility of manufacturing inaccurate parts due to the lack of material to the stop.

The purpose of the invention is to improve the accuracy of manufactured parts.

This goal is achieved by the fact that in a sequential stamp, at least one punch is punch and the punch is provided with one safety device installed on one plate with a punch punch and on one axis parallel to the direction of movement of the material, parallel to the direction of movement of the material and spring-loaded in the direction of movement of the material.

FIG. 1 shows a stamp, a longitudinal section; in fig. 2 - section A-A on top of the lower part of the stamp; in fig. 3 - section bb below the top of the stamp; in fig. 4 - section bb of the die section along the step stop; in fig. 5 - isometric safety device; in fig. 6 is a diagram of the stamping of a part on a stamp.

The stamp contains in the upper part a split punch 1, the side portions 2 of which serve as stepping knives and punch punches 3 sitting in the punch holder 4 attached together with the base 5 to the top plate 6. The punch holder 4 has two rectangular holes in which x 7 planted with the possibility of rotation of the catchers 8, pursed springs 9. The side sections 2 of the split punch 1 have

the length is greater than the feed pitch So at (0.2-0.3) pitch and the projections 10 with bevels. To the top plate 6 is attached spring-loaded springs 11 puller 12.

One of the safety devices 8 is shown in FIG. 5B, a cylindrical recess is provided in its upper part, which serves to fix the end of the spring 9. The catchers 8 are located away from the piercing punches 3 at a distance greater than the supply step SQ on

(0.1-0.15) material thickness.

In the lower part, the chipboard contains a matrix 13 and guide lines 14 and 15 with a shelf 16 attached to the bottom plate 17. In the matrix 13, holes are made for a split punch 1, for punch punches 3 and oval holes for catchers 8. In the rulers 14 and 15 placed step stops 18, pressed by the springs 19, enclosed in the cage 20. At the ends of the stops facing the punch axis, bevels are provided in contact with the bevels on the projections 10 of the punch 1.

The stamp works as follows. The blank 21 is placed between the rulers 14 and 15 and brought to the stops 18, which are in the extended position. During the working stroke of the press, the punch 1 separates a small area from the end of the workpiece and cuts the workpiece with a width of W along the edges to the size of the part, and the punch 3 forms holes in it. Then, the blank is fed to the left until it stops 18, and at the next working stroke of the press, the punch 1 separates the first part from the blank. In this case, the catchers 8 enter the holes formed in the previous step by the punch 3 and under the action of the springs 9 ensure the contact of the workpiece 21 with the stops 18. At the time of lowering the punch 1, the bevels on its ledges 10 of the lateral portions 2 are pressed to the sides by the stops 18 and thereby

overlap the parts of the stock separated at the previous step along the edges of the blank. This prevents the occurrence of burrs at the edges of the part. Since the catchers 8 are offset from the feed pitch by 0.1-0.15 from the thickness of the workpiece, they enter the holes formed by the punches 3 in the previous step with some strain and ensure the contact of the workpiece with the stops 18 and, therefore, the exact relative position punched holes in the details in relation to its contour. When feeding the workpiece 21 to the next step, the finished part 22 is removed from the die. The implementation of the invention will improve the accuracy of manufactured parts.

20-.154

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Claims (1)

STAMP OF SEQUENTIAL ACTION by ed. St. No. 604609, characterized in that 'in order to increase the accuracy of the manufactured parts, at least one punch is punch and the stamp is equipped with at least one catch installed on one plate with a punch punch and on one axis parallel to it, parallel to the direction of movement of the material , with the possibility of rotation in a vertical plane parallel to the direction of movement of the material and spring-loaded in the direction of movement of the material. SU „„ 1133002