SU352700A1 - - Google Patents

Description

The described stamp refers to the field of tooling used in sheet metal forming.

A stamp is known, on the fixed and movable parts of which a punch and a punching matrix are installed, as well as a mechanism for moving the processed material per step.

However, the mechanism for moving the material to be processed per step does not provide the necessary precision for non-displacement, since its organs are not based on the surfaces of the workpiece being processed.

An increase in the accuracy of the material movement is achieved due to the fact that the matrix is hinged on the fixed part of the stamp and provided with an emphasis placed in a curvilinear groove made in the movable part of the stamp in the plane of rotation of the matrix, as well as guides in which a puaisable with returnable -available movement when moving the moving part of the chip.

Pa figs. 1 shows a general view of a stamp in three projections; pas figs. 2 - separate transitions during bending of the workpiece; in fig. 3 shows a general view of the manufactured part and the cutting scheme of the material.

grooves 3 are provided that serve as guides for the movable knife 4, and also a hinged matrix 5 for punching holes and a spring-loaded matrix 6 for

are flexible. In addition, on the basis of the installed fixed knife 7, the receiver 8 and the spring retainer 9; The knife 4 is provided with four protrusions 10, 11, 12, and 13. In the protrusion 10, in a plane perpendicular to the plane of movement of the feed material 14, a curvilinear groove 15 is made. the matrix 5 is provided with guides 16 in which

movable penetrative punch 17 with a tooth 18. Tooth 18 is placed between the projections 11 and 12 of the knife 4. The matrix 6 is equipped with a protrusion / 9 serving as a stripper in case of the finished part sticking to the knife 4. At the end of the knife.

(see Fig. 2) edges 20 serve for notching the material, edges 21-for bending a closed contour and edge 22 - for cutting the finished part 23 from the material.

When working shtampa sheet material

(tape) 14 with a width equal to the length of the sweep of the part being manufactured (see Fig. 3) is inserted into the window of the receiver 8 and fixed in the stamp by the clamp 9, which only allows the material to be moved in one direction} 1i. With

by the action of the groove 15 moves to the extreme position, the initial one for feeding the material (the position is shown in Fig. 1). Then with further movement of the knife 4 under the action of the protrusion 11 of the punch 17 punches the holes in the workpiece. When the knife 4 is lifted under the action of the curvilinear groove 15, the matrix 5 coBMecTiio with the breakdown pin 17, which is in the lower position, moves by the amount of the nodal stroke to the extreme opposite position, thus advancing the tape. After the end of the feed, with the further movement of the knife 4 to the upper position, the punch punch under the action of the protrusion 12 is removed from the matrix 5 and from the material. During the second stroke of the knife 4, similar actions are produced, and the material 14 is fed to the knife 4 moving line. At the third stroke of the knife 4, the edges of the material 14 are first cut, then the edges are followed by a flexible closed contour on the die 6, which is finished 13 rotates, freeing the path for the knife 4 to cut the finished part 23 from the workpiece 14.

THE PROPOSAL

Ctami, on the fixed and movable parts of which are installed nuanson n matrix

for the piercing, as well as the mechanism for moving the material to be processed, characterized in that, in order to improve the accuracy of the movement of the material, the matrix is hinged on the fixed part

stamp and equipped with a bore placed in a curvilinear title, made in the moving part of the stamp in the matrix of the rotation, as well as guides, in which the device is installed

reciprocating movement at non-displacement of the movable part of the stamp.

tpLie 3