SU1766567A1 - Die for die forcing of forcing with variable section - Google Patents

Abstract

Usage: in the processing of metals by pressure. SUMMARY OF THE INVENTION: A die for die forging forgings with an elongated shaft consists of upper and lower halves and contains a final stream with a flat bridge and a magazine. On the steep bridge there are brake grooves located at a variable angle from 45 to 20 ° C. to the axis of the stamp. 2 Il.

Description

The invention relates to the processing of metals by pressure and can be used in stamps for die forging forgings with an extended axis and variable cross section.

A stamp is known for die forging of forgings with an elongated axis, containing upper and lower halves with engravings forming a stream with a flat bridge and a brake groove along the contour.

one.

A well-known stamp for die forging of forgings is formed by the upper and lower halves of the stamp and having in some sections of the contour of the figure of a stream a burr groove with the main and additional bridges 2.

However, a clouded bridge with a brake groove along the contour 1 does not provide reliable braking and directional flow of the metal along the axis, and a burr groove with an additional bridge 2 is laborious to manufacture.

The purpose of the invention is to save metal due to the directional outflow of metal and to improve the quality of forged forgings.

This goal is achieved due to the fact that when stamping forgings with an elongated axis in areas of the stamp requiring axial movement of the metal, an overhead bridge with brake grooves of at least three located at a variable angle from 45 to 20 ° is used. in the direction of a smaller section of the forging contour and exit to the store.

FIG. 1 shows a section A-A of the stamp in FIG. 2; in fig. 2 - lower half of the stamp in the plan.

The die for die forging forgings with an elongated axis consists of the lower 1 and upper 2 halves and contains the final stream 3 with a flat bridge 4 equipped with brake grooves 5 and a magazine 6.

The optimum angle of inclination of the brake grooves on the sluice bridge to the punch axis at which the fit is obtained, without clips in the transition zone, forging with the minimum consumption of metal in breaking is experimentally established.

(L

WITH

Xi

and ate about

VI

The execution of brake grooves at an angle of more than 45 ° on the bridge bridge leads to an increased consumption of metal in the burrs and non-completion of the forging form.

Making brake grooves at an angle of less than 20 ° leads to the formation of stamping cracks (clamps) on the forging in the transition zone K.

The best results in reducing the consumption of metal and ensuring the quality of stamped forgings were obtained with the fan arrangement of brake grooves (no less than three) on a batten bridge with an angle of inclination to the axis of the stem from 45 to 20 ° in the direction of the required expiration of the metal.

The die for die forging forgings with an extended axis works as follows.

The original billet, trimmed on press shears, for example, steel 45X, taking into account the filling of the stream over the maximum cross section, is heated to the forging temperature (1200 ° C - 1250 ° C) and transmitted to the mountain-forging press. On the crush area, in FIG. not shown, the blank is flattened to the maximum height of the forging in one stroke of the press and placed in the final creek of FIG. 2. In the final stamping, due to brake ka

The number of at least three located at a variable angle from 45 to 20 ° to the axis of the punch causes intense outflow of metal in the axial direction with filling of the forging contour.

The results of testing the stamp show that its use for the manufacture of forgings with an extended axis and variable cross-section, in comparison with the prototype, reduces the metal consumption by 10% by reducing the length of the workpiece and eliminates the defect of forgings on unfilled and clamps.

Claims (1)

Claim stamp for die forgings of variable cross section forgings, containing upper and lower halves with engravings forming the final stream, having a coated bridge with metal braking grooves located on it, and a magazine characterized in that, in order to save metal and improve quality forgings due to directional metal outflow, grooves for braking the metal are made not less than three, are located at a variable angle of 45-20 ° to the axis of the punch, decreasing it in the direction of a smaller section The forgings are forgings and mates with the store. ig / + "R2