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硬质合金用在搪缸机搪刀上,只须2.5公厘宽,3公厘高,5公厘长。但市上买到的规格都比较大,必须切开使用。我场使用电火花切割,效果良好。切割工具的构造如图所示。锯片用低炭钢制,衬以胶木内套,使锯片与电动机绝缘,以防滚珠轴承内发生火花,损坏滚珠。锯片刃口部呈鸠尾状,缘宽0.7公厘。锯片轴套通过炭刷,与直流发电机
Cemented carbide is used on the boring machine boring cutter and is only 2.5 mm wide, 3 mm high and 5 mm long. However, the specifications purchased in the market are relatively large and must be cut and used. I use electric spark cutting in the field and it works well. The structure of the cutting tool is shown in the figure. The saw blade is made of low carbon steel and lined with a bakelite inner sleeve to insulate the saw blade from the motor to prevent sparks in the ball bearing and damage to the balls. The edge of the saw blade is in the shape of a dovetail with an edge width of 0.7mm. Saw shaft sleeves through carbon brush, with DC generator