SU871908A1 - Compound die for blanking and punching - Google Patents

Description

(54) STAMP COMPOUND ACTION FOR PUNCHING AND CUTTING

one

The invention relates to the processing of metals by pressure, in particular to the tooling for cold sheet forming.

A well-known stamp is a combined action for punching and punching, containing a cutting matrix mounted in the upper part and a spring-loaded pressing-ejector protruding behind its working end toward the bottom plate and located in the lower part of the die-punch and protruding behind its working end toward the upper plate is a puller, as well as a mechanism for preventing the part from being pressed into the waste, made in the form of stops 1 fixed to the working surface of the puller.

However, waste (tape) is not clamped in the known die, as a result of which when stamping brittle materials (such as mica, molybdenum), separation in waste occurs, which leads to an increased consumption of expensive material due to an increase in jumpers.

Also known is a combined punch for punching and punching, containing a punching punch, a cutting matrix.

an ejector, a punch-matrix, a puller and a mechanism for preventing the part from being pressed into the waste, made in the form of spring-loaded cams, pivotally fixed in the cutting matrix, and rods fixed on the lower part of the stamp 2.

S This stamp is designed to work on presses that do not have an upper ejector, and when working on presses with upper ejection, the insertion of rods attached to the lower part of the punch is not justified, as they make it difficult to view the working position and remove the part, resulting in reduced performance.

The closest in technical essence and the achieved result to the proposed invention is a combined punch for punching and punching, containing punches of matrix located on the bottom plate and a waste remover mounted concentrically with it, a cutting matrix and punch punches rigidly connected to the top plate, pressing pusher

20 with a collar at the non-working end and a mechanism for preventing the part from being pressed in to waste. The specified mechanism is mounted on the top plate and is made in the form of a pusher with a rod interacting with the upper ejector of the press, and at least two spring-loaded sliders with bevels in contact with the bevels made on the pusher. The pusher is spring-loaded to the upper plate by an elastic element placed in the shank of the upper plate and interacting with the non-working end of the pressing pusher by means of the pushers 3.

The disadvantage of this stamp is the inability to obtain a part with an axial bore.

The purpose of the invention is to provide the possibility of obtaining parts with an axial bore.

To achieve the goal in the stamp, there is a die-matrix punch located on the bottom plate and a waste remover mounted concentrically with it, a die-cutting matrix rigidly connected to the top plate and punching punches, spring-loaded to the top plate by an elastic element pressing the pusher with a collar on the non-working end and a mechanism for preventing the pressing parts in waste, mounted on the top plate and made in the form of a pusher with a rod, interacting with the upper ejector of the press, and at least two spring-loaded crawls shears with bevels made on the pusher, an elastic element of the push-ejector is placed between the non-working end of the latter and the top plate, sliders-clamps are installed with the ability to interact with the shoulder of the pusher, the pusher is made in the form of a cross member spring-loaded to the top plate in contact with the rod, and the console is fixed there are rods in it, and the pusher bevels are made on the free ends of these rods.

The drawing shows the proposed stamp in the section, a General view.

On the lower plate 1 of the stamp is located the punch-matrix 2 and the puller 3. The puller 3 is mounted concentrically with the punch-matrix 2 and provided with buffer 4. On the upper plate 5 of the punch the die 6 and punch punches 7 are rigidly fixed. Press-ejector 8 with a collar 9 at the non-working end is spring-loaded to the upper plate 5 by an elastic element - buffer 10, placed between the non-working end of the pressing-pusher 8 and the upper plate 5. On the upper plate 5 a mechanism is mounted to prevent the part from being pressed into the waste with the slider-clamps 11 and the pusher , with the rod 12, interacting with the upper ejector press (not shown). The pusher is made in the form of spring-loaded springs 13 to the upper plate 5 of the cross member 14, which is in contact with the rod 12, and the rods 15 cantilever-mounted therein,

the free ends of which have bevels 16. The slider-clamps 11 are installed with the ability to interact with the shoulder 9 of the pressing-pusher 8, spring-loaded plate springs 17 and have bevels 18 in contact with the bevels 16 of the rods 15. To the upper plate 5 is attached a shank 19, inside which is the rod 12 of the pusher. For fixing the upper part of the stamp relative to the lower, guide columns 20 and sleeve 1 are used.

ki 21.

The stamp works as follows. When the working stroke of the stamp, the punch-matrix 2 cuts the contour of the part along the cutting matrix 6, and the punching punches 7

punch holes in it. At the same time, the pushing-out 8, lifting and squeezing the buffer 10, passes the spring-loaded slide-clips AND under its collar 9. The rods 15 together with the crosspiece 14 are in the extreme upper position under the action of the springs 13. After punching and punching the part while lifting the top of the flapper, the puller 3 removes waste, and the pusher 8 presses with its collar 9 at the ends of the locking pins 11, thereby preventing the part from being pressed. The distance between the lower plane of the pressing ejector 8 and the lower plane of the die 6 must be at least as thick as the material being cut.

0 Upon further movement of the upper part of the sctamp upward, the pusher 12, meeting with the pusher of the press, presses on the crossmember 14, as a result of which the rods 15 attached to it, pushing the bevels 16 apart with their bevels 16, pull them out from under / of the collar 9 ejector 8, which under the action of the buffer 10 pushes the cut part from the matrix 6.

The proposed design allows 0 to cut down parts of any configuration with punching holes in any place, with a high-quality cut both on the part and on the waste, which reduces the consumption of the material being stamped by reducing the jumpers, while improving the working conditions of the puncher, which increases labor productivity.

Claims (1)

Invention Formula Combined punching and punching punch containing a die-matrix punch located on the bottom plate and a waste puller mounted concentrically with it, a die-cutter rigidly connected to the top plate and punching punches springed to the top plate by an elastic pressing-ejector element with a collar on the non-working end and the prevention mechanism