SU1013023A1 - Three-dimensional part making method - Google Patents

Abstract

THE METHOD OF MANUFACTURING SPATIAL DETAILS by successive longitudinal and transverse flexible sheet billet, in which, on the sizing, before the longitudinal flexible, convexities are formed, having curvilinear surfaces of the second PSF, the longitudinal axes of which are located in the plane of transverse bending, differing from making it in the form of a channel with bent shelves, the bulges are placed between the bending lines of the side walls of the channel, and their surface is formed by the halves of two sohf conjugated interconnected bases elliptical paraboloids having common mating plane J is small ellipses axis of which is perpendicular to the plane of the blank. Aimm opeftittHOta «« 4b; n / (LA A J oo o 1C oo / .5 / J L -I Ltn food / lno gio

Description

11 The invention relates to the processing of metals by pressure and can be used advantageously in the manufacture of spatial details in the form of long profiles with a variable curvature along the length. A known method of making spatial parts is by. longitudinal and transverse flexible sheet billet, in which on the billet in front of the longitudinal flexible, convexities are formed having curved surfaces of the second order, whose longitudinal axes are located in the plane of transverse flexible fl. The disadvantage of this method is that it does not allow to produce high-quality, with minimum wall thinning, transverse bending of profiles in the form of channels with bent shelves. .. The purpose of the invention is to eliminate the main drawback, i.e. quality improvement in the manufacture of spatial channels in the form of a channel with bent off. shelves. The goal is achieved by the fact that, according to the method of manufacturing spatial parts, consecutive longitudinal and transverse flexible sheet blanks, in which convexities are formed on the workpiece in front of the longitudinal flexible, having curvilinear surfaces of the second order, the longitudinal axes of which are located in the flat section of the transverse bending, the convexes have between the lines g of the ba of the side walls of the channel, and their surface is formed by the halves of two (the surfaces of the elliptic paraboloids are interconnected, and The axes of the ellipses, which are common in the plane of conjugation, are small for the short-circuit of which is perpendicular to the plane of the workpiece: Fig. 1 shows the workpiece with molded convexes; Fig. 2: Section A-A and B-B in Fig. 1; Fig. 3 - semi-finished product obtained after the longitudinal bending of the sheet stock (w in a leler with bent shelves); Fig. 4 shows the spatial detail obtained as a result of transversely flexible semifinished product; Fig. B in Fig. 4. The method is carried out as follows. Preliminary on sheet zagoto & ke 1 is formed by convexities 2 each of which has a curved surface of the 2nd order formed by half of the two adjoining bases of elliptical paraboloids. In the plane of conjugation, paraboloids have common small 3 and large 4 axes of ellipses. The minor axes of the 3 ellipses of the conjugated paraboloids are perpendicular to the plane of the workpiece 1.. The opposite poles of the conjugated paraboloids lie on the continuation lines of the bend, and the passage through the poles, the longitudinal axes 5 of the parabopoids lie in the plane of the transverse bend and perpendicular to the lines longitudinal bend. The recommended dimensions of the protuberances are determined by the following ratios 2 .- (0,) - 1CRV1,, e-: fQ.U; , 75R; . 1o, oh, aha, de - distance between the poses of conjugate paraboloids; V) - distance from the poles of paraboloids, scattering 6 beams 7 on the bend lines, to the interface plane of the parabolsdags; -J — distance from the poles of the paraboloids lying on the bends of the side walls 8 of the channel 7 to the interface of the paraboloids; C - the height of the side walls 8 of the seamleur 7; 2- is the length of the arc of ellipses of paraboloids in the plane of conjugation; R is the radius of the transverse m6ji; Vi is the angle of the transverse bend; . U - arc edge of the side wall 8 of the channel 7; Q and B are the sizes of respectively large 4 and small 3 semi-axes of ellipses in the plane of constriction of paraboloids. After forming the protuberances 2, the preform 1 is subjected to longitudinal bending, in which the shelves 6 of the channel 7 are first folded over, and then its side walls 8. In the final operation, the transverse profile is made along the radius R. while smoothing the protuberances 2, Example. A spatial detail of the type of a channel with bent shelves is made of titanium alloy OTCH-1 with dimensions of mm: channel height 30, 1 shelf shelves 18, wall width 3Oj

the blank thickness 0, S, the radius of the base bend 5, the cross bend radius 5 (the length of each straight line section of the 5OO profile.

LL manufacturing did cut bale size of 1000x120x0.8 NIM. Between the lines of the field bend, the shape of the convexity, the dimensions of which, when taken, are equal to mm:

fi 24.34 Ili 4.9J and 37.5; 4 12.5

 75.6.

After molding, the longitudinal bending of the shelves and side walls and the transverse bending of 1119ofvp with a radius R 5 mm are carried out;

The use of the proposed method allows to reduce the thinning of the side walls of the channel on a curvilinear part, i.e. accordingly increase the quality and bearing capacity of the resulting products.

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Claims (1)

METHOD FOR PRODUCING SPACE DETAILS by sequential longitudinal and transverse bending of a sheet billet, in which bumps are formed on the blank before longitudinal bending, having curved surfaces of the second order, the longitudinal axes of which are located in the plane of transverse bending, characterized in that, in order to improve the quality of manufacturing parts in the form of a channel with bent shelves, bulges are located between the bending lines of the side walls of the channel, and their surface is formed by half of two conjugated x basally elliptical paraboloids having a common coupling axis ellipses _small} plane of which is perpendicular to the plane of the blank. Figure 1