SU703200A2 - Method of rolling and milling - Google Patents

Description

   -Ch The invention relates to the processing of metals by pressure and can be used for the manufacture of shaped profiles. According to the main author, St. No. 579083, a method has been established for producing periodic profiles of variable cross section, including cross-screw installation of a billet to a periodic profile followed by one and the same extrusion pass of the billet through a rotating matrix 1. This method allows to produce periodic profiles variable cross-section with calibrated (in the matrix) thickened areas. The disadvantage of this method is | |: t with the impossibility of the imbalance of shaped profiles of continuous speech. The purpose of the invention is to expand the range of rolled products. This goal: is achieved by the fact that, according to the subclaimed rolled laminate profile of the arcuate cross section, prior to pressing, the shape of a constant cross section, for example a circle, is given. Figure 1 shows an installation for implementing the proposed method. general form; figure 2 is a cross section aa of FIG. 1 of the original billet; FIG. 3 - cross-section, section BB, FIG. 1 billet after rolling a screw profile to a circular cross section; FIG. 4 is a cross section of FIG. 1 billet after pressing. The method is carried out as follows. The billet 1 of circular section (section A-A) is gripped by a profiled - the left part of the rolls 2 and deformed to form a shaped screw profile with a smooth contour of the screw lugs and depressions. Obtaining the section of the screw profile on the workpiece provides the possibility of creating a sufficiently large axial EFFORT on the workpiece required for pressing. Next, the right (in the drawing) smooth part of the rolls is provided by the transverse-screw rolling of the billet TO a circle of constant diameter (Fig. 3). Next, the workpiece enters the die 3 and is pressed into a shaped profile of a constant section along the length (Fig. 4). An exemplary embodiment of a method for producing a shaped profile. Took

blanks with a diameter of 16mm of steel -1larki Art. 15.

Before the task of the rolling installation, the billet was heated to a temperature. The rolling was carried out with a 3 m / min drive. Pressing was performed with stretching up to 1.6 t 1.8.

Kiak, showed the experimental tests of the new method, the rolling-pressing process was distinguished by the availability of high processability, large stretch, high productivity, allowed to obtain accurate shaped profiles without pressure control (without waste metal) continuous process. Each subsequent billet pushed through the matrix of the previous one, Cromb, in addition to the usual extrusion, with this method it is possible to press a continuous billet (i.e., billets of a relatively long length according to comparison).

cross sectional size).

The proposed method makes it possible to obtain shaped profiles of constant cross section with increased accuracy.

Fermula Invention

The method of rolling-pressing on auth.St. No. 579083, distinguished by the fact that, in order to expand the range of rolled products, the laminated profile changes: H0GO section before pressing

shaped into a constant cross section, e.g. a circle.

Sources of information taken into account in the examination

1. USSR author's certificate No. 579083, M.cl. B 21 N 8/00, 0 to 21 C 23/01, 1976.

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