SU1219209A1 - Method of producing tapering articles by multistage forming - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to methods for the manufacture of thin-walled conical products by multijunction molding.

The purpose of the invention is to reduce the labor intensity of manufacturing by increasing the degree of deformation at transitions by increasing the backpressure force.

FIG. 1 shows a semi-finished product on the nth junction; Fig 2 - the finished product; Fig. 3 is a scheme for deforming a semifinished product according to the proposed method;

The method is carried out as follows.

The semi-finished product on any pth transcode has a conical section formed at previous operations at the open end and a cylindrical section with diameter d at the bottom. The height of the cylindrical part of the semi-finished product is determined by the formula

dn - do

2tg (t

the height of the cylindrical sections of the semifinished product at the nth junction and the finished product; the diameters of the cylindrical sections of the semi-finished product and the product, the angle of taper of the product.

the ratio of sizes on all transitions with a punch simultaneously with a conical conical side cone

.vniipi

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Branch PIP Patent, Uzhgorod, Proektna St., 4

219209. 2

top and bottom of the semi-finished product with its end. FIG. Figure 2 on the left shows the initial moment of deformation of the semifinished product.

5 Since the angle of taper of the transition. If you don’t change, the punch contacts the entire conical surface of the semi-finished product throughout the entire deformation process, in a 10-minute manner, the distribution at each operation is subjected to the entire conical flange of the semi-finished product, including the areas at the open end that received the maximum hardening and thickening

15 in previous steps to produce a hollow semi-finished product. The dispensing force that arises in this case is large enough; it is transmitted to the cylindrical part of the semifinished product,

20 the emergence of a crimping zone and significantly reducing the value of tensile stresses in a dangerous section at the stretch site at the bottom of the semi-finished product. This not only allows to intensify

25 the process of stamping conic parts by increasing the allowable deformation at each j junction, but also to reduce the thinning of the part wall in the transition zone to the bottom and

30 thus to improve the quality of the finished product.

The method allows to significantly reduce the labor intensity of manufacturing high conic parts with a sharp apex by increasing the permissible degree of shaping by twisting the size of the power support and improving the quality of the products obtained.

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3S

Fi & .З

Claims (2)

METHOD FOR MANUFACTURING CONIC PRODUCTS WITH MULTI-TRANSITION FORMING with support from a hollow semi-finished product with a bottom having a cylindrical section on the bottom side and a conical section on the open end side, at which the diameter and height of the cylindrical part of the semi-finished product are reduced and the height of the conical part is increased, which differs by that, in order to reduce the complexity of the preparation by increasing the degree of shaping at the transitions by increasing the back pressure, during molding. semi-finished product at each transition, the height of the cylindrical section is determined by the formula d_p_ —_d about 2tgoi where h _h and h ₀ - 'the height of the cylindrical sections of the semi-finished product at the ηth transition and the finished product; d _n and d _Q are the diameters of the cylindrical sections of the semi-finished product and product; Λ is the angle of taper of the product, and the angle of taper of the semi-finished product on transitions is left constant, equal to the angle of taper of the product. Phil. 1