论文部分内容阅读
气门导管是内燃机中保证气门与气门座正确配合的零件。气门在导管内作高频直线运动,每分钟达2000～3000次,因此要求导管有较高的精度和好的耐磨性,孔的精度要求为二级,光洁度在▽▽▽7以上。过去我厂加工图1导管的深孔时,由于工艺方法及所用工具存在一些问题,致使质量达不到要求。后来改进铰刀等结构,并采用一次钻、二次铰及一次压光的工艺方法,加工孔的光洁度和精度都达到要求。(1)钻孔。钻出的孔是以后精加工的基础,因此钻孔工序十分重要。钻孔时由于径小孔深,钻头刚性差,若钻头刀刃磨得不对称,就极易引起钻孔轴线的偏
Valve guide is the internal combustion engine to ensure that the valve and valve seat with the right parts. Valve in the catheter for high-frequency linear motion, up to 2000 to 3000 times per minute, thus requiring a catheter with high precision and good wear resistance, hole accuracy requirements for the two, finish ▽ ▽ ▽ 7 or more. In the past, when processing the deep hole of the catheter in Figure 1, there were some problems due to the technological process and the tools used, which caused the quality to fail to meet the requirements. Later reamer and other structures to improve, and the use of a drill, the second hinge and a calendering process, processing hole finish and accuracy meet the requirements. (1) drilling. Drilled hole is the basis of finishing, drilling process is very important. Drilling holes due to the small diameter, poor bit rigidity, if the drill bit grinding asymmetry, it is easy to cause the axis of drilling deviation