SU1386332A1 - Universal die,,particularly,,for bevelling angular sectional billets to negative bevelling - Google Patents

Abstract

The invention relates to the processing of metals by pressure: to a tool for longitudinal bending. The goal is to improve the quality of products obtained by small angled profiles. The device comprises a housing with rotatable semi-matrix (P) installed in it and a punch. П have flat working and persistent surfaces and cylindrical bearing surfaces. The line of intersection of the working surfaces is located above the axial plane P. The angular profile is set to II and under the action of the punch bends when P. is turned. 2 Il.

Description

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about: with with

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The invention relates to the processing of metals by pressure, namely to a tool for the longitudinal bending of Smalkovka) corner shaped blanks for negative bead.

The purpose of the invention is enhancing the quality of products.

The intersection lines (point C) of planes passing through the working surfaces (FE) of semi-matrix 3 are located above the horizontal axial plane (GO). Each semi-matrix 3 is provided with a stop surface (BA) mating with a working surface (FE) from an axial plane (GO) with a cylindrical section (BE). The location of the working and auxiliary planes on semi-matrix 3 selected

Figure 1 shows the universal Yu stamp for the Malkovka corner corner blanks on the negative Mulka, a general view; figure 2 - scheme for calculating the parameters of semi-matrix.

The universal stamp contains a universal one in such a way that, with the largest parallel punch 1 with an angle during the vertical stroke, the punch 1 does not lower the tire equal to the minimum angle small to below the axial plane (GO). At source (on), the matrix consisting of the fundamental position of the working surface of the rest 2, in which the matrix of each of the semi-matrix 3 is set, held by the center, consisting of rotating in time 20 return spring 4 and contacting the working stroke on the cylindrical stubborn thrust planes, the image of the supporting surfaces of the rotary semi-matrix 3 interconnected by a spring 4,

The working surface of each semi-25 matrix 3 is formed by a secant plane (Fig. 2, right FE), perpendicular to the base of the cylinder and is the youngest part of the chord (right FG), from

Em with respect to the axis of the punch angle 45 °.

Constructive dimensions of semi-matrix at a given minimum angle of the punch ci and the largest of the profiles used are the thickness of the flange profile S defined by the formulas: radius R of the bearing surface

R

PE I l, 5S.tg (6730 + - | -) (45 - -) + cos (45 ° - - | -).

"

"

sin (45 - -2)

cutting segment with a central angle of 90 °.

The intersection lines (point C) of planes passing through the working surfaces (FE) of semi-matrix 3 are located above the horizontal axial plane (GO). Each semi-matrix 3 is provided with a stop surface (BA) mating with a working surface (FE) from an axial plane (GO) with a cylindrical section (BE). The location of the working and auxiliary planes on semi-matrix 3 selected

in such a way that with the greatest running time, the punch 1 does not fall below the axial plane (GO). In the initial position, the working surface of each of the semi-matrix 3 held by the return spring 4 and in contact with the thrust planes forming

Em with respect to the axis of the punch angle 45 °.

Constructive dimensions of semi-matrix at a given minimum angle of the punch ci and the largest of the profiles used are the thickness of the flange profile S defined by the formulas: radius R of the bearing surface

"

2

radius r auxiliary surface

l, 5S-tg (67 ° 30

, -four,

 /, r. About V

sin (45 - ---)

The stamp works as follows.

The workpiece is placed in a stream formed by semi-matrices 3. A punch 1, which is lowered at the working stroke, presses on the workpiece, which transfers this force to the half-matrix 3. Under the action of the force from the punch, the matrix; rotate around their axes and bend the workpiece in the zone of its contact with the top of the punch. After

The universal stamp is predominantly for small angled sectional 45 - blanks for negative malka, containing: w; a case with a matrix installed in it, consisting of two rotatable semi-matrix, having flat working and cylindrical supporting movements of the punch to its original surface. and the semi-matrix wedge-shaped Poin-and-Folds return to their initial position by the return spring 4.

This stamp is universal, does not require the manufacture of any replaceable working parts for each small piece. Lengthy billets can be malkovat with shifting. The proposed stamp provides

The high quality of the weld is achieved by eliminating the bending of the shelves while reducing the overall energy expenditures for stamping due to the lack of need to calibrate parts after the weld. 40

Claims (1)

Invention Formula The universal stamp is mainly for small angled sectional 45 - blanks for negative malka, containing: w; iy case with a matrix installed in it, consisting of two rotatable semi-matrix, having flat workers and cylindrical supporting pads, as well as By the fact that, in order to improve the quality of the products, the working surfaces of the half of the trice are at an angle to the axis of the punch, and their line of intersection is located above the horizontal axial plane of the semi-matrix, each semi-matrix Nena the abutment surface as a vertical secant the sliding plane mating with the working surface from the axial plane of the side surface of the circular cylinder. FIG. one NT