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2024
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Carbide Gear Broaches Material Characteristics and Design Features
Since gear broaching is a high-precision, high-load machining process, ordinary tool materials are prone to rapid wear, while carbide gear broaching materials are mainly composed of tungsten carbide (WC) and other hard phases and cobalt (Co) and other binder phases. Cobalt, as a binder, is able to bind the tungsten carbide particles together tightly, and at the same time, it can also give the tungsten carbide a certain degree of toughness, preventing the tool from brittle cracking in the broaching process. Under normal use conditions, its wear rate is much lower than that of HSS gear broaches. For example, after broaching a certain number of gears consecutively, the edge wear of a carbide broach may be only 1/3 - 1/5 of that of a HSS broach.
Design and structural features
The tooth shape of the carbide gear broach is precisely designed according to the modulus and number of teeth of the gear to be processed. The tooth height, tooth thickness and other dimensions of each tooth need to be strictly controlled to ensure that the gear tooth shape can be accurately machined to meet the requirements. Cutting teeth generally include rough-cutting teeth, fine-cutting teeth and calibrated teeth. Rough cutting teeth are mainly used to quickly remove most of the residual quantity, fine cutting teeth are used to accurately process the tooth shape, calibration teeth are used to calibrate and correct the processed tooth shape to ensure the accuracy of the gear.
