SU1609593A1 - Method of producing welded flange beams - Google Patents

Abstract

The invention relates to the manufacture of welded structural elements of the rolling stock in the car building. The purpose of the invention is to reduce the cost of welding, improve the quality of welding and reduce energy consumption. Cut a wedge in the vertical wall of the I-beam from the side of the bendable part in the zone of fillet transitions from the vertical wall to the shelf of the I-beam. At the same time, a horizontal platform is formed from fillets and a vertical wall is placed on it, which is welded to the part being bent. Welding of the bottom under the bend to the main part is performed by double-sided welding seam. Such technology reduces the labor costs associated with deforming the bottom of the beam. 1 hp f-ly, 4 ill.

Description

The invention relates to the manufacture of structural elements of a sub-flying composition, in particular, frame beams of railway cars.

The aim of the invention is to reduce the cost of welding, improve the quality of welding and reduce energy consumption for deformation.

FIG. 1 schematically shows a billet of an I-beam with cut-out sections. FIG. 2 - ready beam, obtained by the proposed method; in FIG. 3, section A-A in FIG. 2 in FIG. 4 - node I in FIG.

The fabrication of I-beams is made by cutting out the fire sharp profile sections in the form

wedges 1 (figure 1) of the vertical wall 2 of the standard rolling "beam (I-beam) of the required length. The cutting of wedges 1 from the bottom t of the bendable part 3 is carried out in the zone of fillet transitions 4 (FIG. T) from the vertical wall 2 to the shelf 5 of the I-beam. This creates a horizontal platform 6, somewhat remote from shelf 5, i.e. sufficiently enough to accommodate a cutting tool (not shown). The platform 6 has a width that is also sufficient for placing the vertical wall 2 and the legs of the welding seam 7 on it, which are produced using automatic welding in carbon dioxide

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It is necessary to weld a bendable bottom shelf 5 to the main part of the wall 2.

The method is carried out as follows.

According to the proposed method, it is most expedient to manufacture beams used in carriage construction, for example, for ridge beams of railway platforms. For the manufacture of beams, standard two- are used. T-beams of the required length ,. The first technological operation of manufacturing beams is to obtain a blank (Fig. 1), which is carried out by cutting wedges 1 from the vertical wall 2 of the I-beam. The cutting is made from both ends of the beam simultaneously or alternately with an oxygen-oxygen flame on a copier on a stand using mechanized cutters with elongated mouthpieces. The latter is necessary to make the cut in the immediate vicinity of shelf 5 (FIG. 3), i.e. in size a (Fig. 4) in the zone of filleted junctions 4 to form a horizontal platform 6 of width S.

The second operator is the deformation of the bendable part (Figures 1 and 2) on a stand (not shown) using three pneumatic or hydraulic cylinders until the horizontal area 6 of the shelf 5 touches the cut-out wall 2.

The third, last technological operation is automatic welding at the stand on the copier of the wall 2 with the bent shelf 5 into the T-joint by laying a double-sided fillet in the contact zone 30

35

40

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75

609593 4

New horizontal platform 6 with a cut-out wall 2. This uses welding with welding wire in a carbon dioxide environment.

Using the proposed method of manufacturing beams provides a lower cost of their manufacture. Welding seams at the same time have a smooth cast surface with a favorable seam geometry (small reinforcement, smooth transition from the base metal of the seam to the metal of the wall and the flange). The depth of penetration of the wall of the gutter satisfies the requirements for welding basic seams.

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Claims (2)

1. A method of manufacturing welded I-beams having end zones with a reduced cross section, including cutting out the profile sections in the vertical wall of the I-beam, in the end zones, deforming the remaining part along the profile of the formed vertical wall and welding it to it, which is similar to that , in order to reduce the cost of welding, improve the quality of welding and reduce energy consumption for deformation, when cutting longitudinal sections, the cut from the side of the shelf is positioned along fillet transitions from vertical from the wall to the shelf with the formation of a horizontal platform, which is joined to a vertical wall. 2. The method according to claim 1, characterized by the fact that the welding of the trimmed vertical wall with the deformed remaining part is carried out with a double-sided butt joint. Figg Podgka FIG. 3 tsh7l FIG.