SU526430A1 - Stamp for trimming and stripping forgings - Google Patents

Description

one

The invention relates to the field of metal forming and is intended for trimming and stripping of forgings on mechanical presses.

A stamp for cutting and stripping forgings is known, which contains an upper plate with trimmed and stripping matrips, inside which a stripping punch is installed, and a lower plate with a trimmed punch.

In order to increase productivity and improve the quality of stripping, the stamp is provided with copiers mounted on the bottom plate, and the stripping matrix is made of horizontally movable sections having upper and lower cutting edges and interacting with said copiers.

The drawing shows a General view of the stamp in the section.

The stamp for trimming and stripping the packages contains the bottom plate 1, on which two U-shaped racks 2 and the trimming punch 3 with a spring-loaded stripper 4 are rigidly fixed.

Copiers 5 are mounted inside the U-shaped racks 2. Hydraulic cylinders 6 are rigidly attached to the upper crossbar of the U-shaped racks, the rods of which are connected to the copiers 5.

A housing 8 is attached to the top plate 7, on

the matrix 9 is rigidly fixed and the side windows of which include, for example, two stripping sectors 10 (a stripping matrix), which are mated with a tailpiece to copiers 5.

Through the working cavity of the trimmed 9 and the stripping 10 dies, a spring-loaded wiper And-punch, which is kept from falling out of the working area with rolling pins 12, passes. These rolling pins can abut against the rigid bar 13 of the press.

Works stamp as follows. Forging 14 (such as a flat spanner) is placed in the slot of the puller 4, while moving

the upper part of the punch down, the forging is clamped between the trimming punch 3 and the wiper punch 11, after which the die 9 (see the drawing, left position), which cuts the forging along the contour, and lowers 15, comes into operation.

When the stripping sectors 10 are touched by the lower cutting edges 16 of the forgings 14, they (the stripping sectors 10) will begin to diverge under the action of the copiers 5, with

this cutting edges 16 will describe the trajectory corresponding to the upper part of the copiers 5, and cut off the metal layer from the forgings 14, thereby making stripping from top to bottom. The movement of the upper part of the stamp down

will last until the moment when zachi3

The core sectors 10 will fall below the forging 14, i.e. the forging will be above the stripping sectors, and at this moment the stripping sectors will be moved to the forging side by the action of the copiers 5.

At the same time, the clamp 17 will turn the distribution valve 18 of the hydraulic cylinders 6 and the copiers 5 will move up to the stop. This will correspond to the closed position of the stamp.

When the press ram moves up, and with it the upper part of the stamp, the upper cutting edges 19 of the wiper sectors 10 will approach the forging 14 (see drawing, right position) and together with the forging they will start moving up to the contact of the strips 12 with the slats 13, i.e., the stripping punch 11 rests against the fixed planks of the press, the housing 8 and the parts associated with it will continue to move upwards relative to the stripping punch 11 and forgings 14. At the moment when the cutting edges 19 of the stripping sectors 10 touch the forgings 14 , they (sweep sectors 10) when moving will diverge upwards again under the action of cams 5, the cutting edges 19 are curved surfaces copy bottom of cams 5 and to cut off the metal layer 14 with the forging, thereby producing a final sweep upwards.

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When the press ram approaches the uppermost position, the clamp 17 will turn the control valve 18 and the copiers 5 will move down to the stops under the action of the hydraulic cylinders.

The upward movement of the upper part of the stamp will continue until the forging passes through the stripping sectors 10, the trimming matrix 9 and falls on the trimming plug 3.

Thus, on the trimmed punch 3 and

puller 4 will lie freely

14 forged, burnt 15 and scrap

after stripping, which can be easily removed, for example, with a jet of compressed air.

Claims (1)

Invention Formula A stamp for trimming and stripping of forgings, comprising an upper plate with cut and stripping dies, inside which a stripping punch is installed, as well as a lower plate with a trimmed punch, characterized in that, in order to increase productivity and improve the quality of stripping, it is provided mounted on the lower plate copiers, and the stripping matrix is made of horizontally movable sections with upper and lower cutting edges, mounted with the possibility of interaction with said copiers. fj ftf / I.i 17, Llpr