Formation of structure and mechanical properties of welded joints of titanium-aluminum composites

Abstract

DOI: https://doi.org/10.32820/2079-1747-2020-25-56-61

In the manufacturing process of machines, as well as in repair work, it is necessary to cut blanks from difficultly processed, viscous materials. Currently, this operation is performed on cutting or conventional turning and milling machines, as well as on mechanical saws, using hacksaw blades that quickly wear out or break down, thereby increasing the cost of work. Often this method of cutting is generally impossible due to the high hardness or viscosity of the material.
Gas or electric welding cutting is even more expensive and, at the same time, the processing surface is of poor quality. In addition, the chemical and physical properties of the material at the cutting site are deteriorating.
There are known methods of cutting with rotary cutters, namely the "vortex" method of threading. The vortex method is used for cutting threads both with an external touch with cutters, and with an internal touch. This method allows the processing of workpieces of carbon and alloy steels, including the ones thermally treated to the hardness HRC 50, as well as non-ferrous alloys and cast iron.
The essence of these methods is the same and consists in the fact that the cutter heads with the cutters fixed in them rotate at a high speed, and the workpiece being processed rotates and performs a circular feed.
The disadvantages of the known methods of cutting with rotary cutters are that they exclude a radial feed of deep cutting, which does not allow for the cutting of workpieces.
The article describes the method of high-speed cutting of workpieces by the "vortex" method, which allows cutting material of any hardness or physical and chemical properties. In addition, the cut is accurate, of high quality, and, if necessary, with the desired shape and geometry of the cut edges.
The article describes the methodology and technology of cutting rolled products and pipes of any thickness due to the proposed design of the cutting machine, which provides a transverse feed of cutting for one revolution of the cutting head from 0 to the end of the cut. A machine, manufactured according to this method, showed excellent cutting results and was introduced into production.