May 25, 2017
In addition to good tools, coated cutting fluids, there is a new process for cutting off the thermal circuit.
As everyone knows, in the process of metal cutting and chip deformation due to friction, so that the cutting area had a high temperature, at the same time as the tool and the workpiece of different materials, a thermocouple poles caused thermal electromotive force, the DC current heat. It is easy to strengthen the oxidation process of surface of carbide turning tool,and accelerate the tool wear. Under certain conditions,a thermal electromotive force is also generated in the contact area between the tool and the machine tool, the contact area between the workpiece and the machine tool,and the friction pairs of the machine tool itself. During the cutting process, there is also a thermal magnetic effect and an electromagnetic effect. In the high temperature contact zone,the surface will also produce electron emission of discharge phenomenon.
In recent years, domestic and international science and technology researchers show that the heat caused by thermoelectric current generated in the cutting process and other factors, the two heat current is to form a loop through the machine tool workpiece tool system. At the same time, there is a local thermal current in the tool - workpiece limited contact area cycle, and therefore exacerbated the tool wear. So, to improve the cutting performance and improve tool life in addition to the above basic way, can also adopt a new approach,and the strengthening of carbide tool wear thermal flow effect to fight, to cut off the hot current loop.
Cutting method of heat current circuit is very simple, even if the tool insulation and machine tool or workpiece and machine tool, the thermal current loop cannot be formed by cutting area, so as to reduce metal affinity,reduce bue and scale production,so as to improve the cutting performance of carbide turning tool, improve the tool life and processing quality.
How to cut off the thermal current loop. On the lathe, in the various carbide turning tool with a bakelite pad knife plate or plastic pad knife plate, the knife rod under the plane, and the side of machine tool carriage of insulation; milling, planer, if the vise clamping the workpiece,and the workpiece between jaw pad of wood or rubber the insulation board,workpiece and cutter and clamp the drill; it can be made of high strength plastic and plastic handle shank drill cutter, the shank and the spindle hole insulation.
It has been proved by practice that cutting off the heat current circuit is especially suitable for the processing of high strength, high hardness and hard cutting materials to show the effect, and the durability of the tool is usually increased by 1~2 times. Therefore, it is one of the easiest and easiest methods to implement.
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