Metal circular saw blade and preparation method thereof

Abstract

A metal circular saw blade comprises a saw blade body. An installation hole is formed in the middle of the saw blade body. Saw teeth are arranged on the periphery of the saw blade body. The two side faces of the saw teeth are provided with coatings. In the structure, the coatings are arranged on the upper surfaces, the lower surfaces and the tooth top faces of the saw teeth. A preparation method of the metal circular saw blade includes the following steps that the saw blade body is vertically installed on a saw tooth rotary coating and machining rotary worktable; a coating paint liquid tank is lifted to the minimum degree that the saw teeth are immersed to the 50-milimeter portion of coating paint; the coating paint on the surfaces of the saw teeth is dried through a hot air blower; the number of rotation times is determined according to the coating thickness and performance of actual requirements, and the paint liquid tank is replaced; a tooth-shaped graphite electrode makes contact with the saw teeth to power on and pressurize the saw teeth, and the next saw tooth is machined till machining is completed; and a cylindrical metal electrode makes contact with the two side faces of the saw blade to power on and pressurize the two side faces of the saw blade, and the saw blade rotates uniformly by one circle till the two side faces of the saw blade are sintered to generate the metal circular saw blade provided with the coatings.

Description

technical field [0001] The invention relates to a cutting tool, in particular to a metal circular saw blade and a preparation method thereof. Background technique [0002] Metal cold and hot cutting saw blades are a kind of metal circular saw blades, commonly used cutting tools in iron and steel enterprises. The commonly used grades of saw blade materials are 45Mn2V, 50Mn2V, 65Mn, 75Cr1, 8CrV, etc. Due to the effect of cutting heat and workpiece heat conduction, the temperature of the sawtooth exceeds the thermohardness to cause wear and the bonding wear between the cut material and the surface of the sawtooth is the main reason for the failure of the saw blade. At present, the low-temperature tempering after quenching of the tooth tips used in the processing of metal cold and hot-cutting circular saw blades cannot solve the above problems. The specific operation is to use electrodes to heat the saw teeth to above 750 degrees Celsius, then air-cool, and then use 250 to 350 d...

AI Technical Summary

Problems solved by technology

[0003] At present, the metal cold and hot cutting circular saw blades produced at home and abroad adopt the process of overall quenching and partial quenching of the tooth tip after overall quenching and tempering, which cannot solve the problem of low service life due to the limitations of the material of the saw blade. The disadvantage of metal circular saw blades is that the cost is too high and the process is complex and difficult to process. Taking the metal circular saw blade with partially welded alloy as an example, the price is more than 4 times that of metal cold and hot cutting circular saw blades and cannot be used for hot cutting. The working line speed is only 1 / 40th of a saw blade for hot and cold metal cutting

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