SU984771A1 - Tool for friction welding-on of holes - Google Patents

Description

(54) TOOL FOR WELDING HOLES

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The invention relates to mechanical engineering, in particular, to friction welding using friction while rotating an instrument for plugging openings, for example, in parts of fuel equipment of internal combustion engines.

A known tool for welding holes by friction, made in the form of a rod with a forming spherical or conical recess 1.

When using a well-known tool above the end surface of a part that is associated with a recess formed during the welding process, a rat acts, which degrades the aesthetic appearance of the product and the fit of the parts to the end surface.

In the known method, the burr is removed with a cutting tool: a countersink, a drill, a file, which defines a separate metalworking operation.

The purpose of the invention is to improve the performance and quality of the welding of holes by simultaneously welding and removing burr, which formed a recess after welding. FRICTION

The goal is achieved by haem, that on the body of the tool for welding holes, made in the form of a rod with a forming spherical or conical recess on the working end, at least one cutting element is made with a back angle d 6 ° ± 35 ° and a cutting edge that is inclined to the axis tool rotation at angles r 0-90 ° and L .0 ° -45.

FIG. Figure 1 shows a tool on which a cutting element is made with a back angle d and a cutting edge A which is inclined to the axis of rotation of the tool at an angle f corresponding to the main angle in terms of the cutting tool; ia, 5 fig. 2 shows a cutting edge at an angle A to the axis of rotation; in fig. 3 — groove with chamfer in the form of a chamfer f X 45 °; in fig. 4 shows a section B-B in FIG. 2

The limiting values of the angles of the cutting element should be considered optimal and expedient.

Claims (1)

In the case when the angle is h 90 °, the tool turns into a cylindrical one, the necessity of which is due to rare specific requirements, for example, when a part is located in the recess. In the first instrument introduced, the optimum angle in terms of 45 ° and 30 ° was found. The angle cf 30 ° is used where it is more difficult to limit the errors of the axial movement of the tool. The angle tf 45 ° is used as a common angle for chamfers. A change in the rear angle d is taken at around 6 ° as optimal. So, when brewing a hole in parts made of steel A 6–14 °, and in parts made of aluminum alloys at 10–35 °, depending on hardness, the softer the alloy, the greater the angle. The inclination angle of the cutting edge is 45 °. When brewing a hole in an Alu aluminum alloy part, the angle A 20 ° is optimal for chip removal. At smaller angles, chips are melted and the chip grooves are filled. Brewing holes with the proposed tool with a cutting element makes it possible to combine two operations, improve the aesthetic appearance of the product, improve the performance and quality of welding, and improve safety conditions. Claims A tool for welding holes with friction, made in the form of a rod with a spherical or conical recess at the working end, characterized in that, in order to increase productivity and quality by simultaneously welding and deburring, at least one cutting element is made on the tool body. with a back angle A of 6 ° -35 ° and a cutting edge that is inclined to the axis of rotation at angles Cf and A Sources of information taken into account in the examination. USSR Author's Certificate No. 145620, cl. B 23 C 20/12, 1977 (lroto . / ZJ./ fug. J 3-ff.