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The material of the Drive Axle Wheel Reducer housing parts (see Figure 1) is generally QT550-5 or QT600-3 ductile iron. Due to the large number of holes in the machining of such parts, the service life of the drilling tool is required to be high. When the pores are actually processed, the edge of the main flank face of the integral alloy drill bit is severely chipped at the edge of the blade, which causes the overall alloy bit to be directly scrapped, and the tool life is reduced, resulting in a significant increase in the cost of the tool for the machined part. The increase in processing time leads to a significant increase in production costs during parts production. In this paper, the improvement scheme of the hole- cutting tool of the shell-type reducer housing parts is provided for the problem of chipping of the whole alloy bit.
Figure 1 Drive axle wheel reducer housing parts
Improvements to the corners of the tool not only solve the problem of chipping, but also ensure cutting performance. Many drill bit grinding methods, such as grinding the transition edge, grinding the chisel edge, grinding the edge and grinding the chip flute, can not solve the chipping problem of the knife through the test. The theoretical basis of the turning tool gives us some inspiration. According to the powerful cutting tool and the roughing turning tool to prevent the cutting edge from chipping, the cutting edge design has a chamfered surface, and the width of the chamfered surface is very narrow. It can improve the strength of the cutting edge and increase the heat dissipation area. It is most suitable for the processing of rough cut forgings or intermittent surfaces. According to this idea, the chipping of the drill bit is improved, and the tool improvement is shown in Figure 2.
(a) before improvement
(b) after improvement
September 04, 2021
August 20, 2021
November 19, 2020
August 26, 2021
May 26, 2021
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September 04, 2021
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May 26, 2021
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.