Manual grinding of chamfering forming turning tool

2022-08-19
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Manual grinding of bearing assembly chamfer forming turning tool

according to the installation characteristics of the bearing and the feasibility of processing, the assembly chamfer with 15 ° guide is designed in the turning process to ensure the guidance of the bearing and the mating surface, so that the bearing can be installed smoothly (see Figure 1)

the size, shape and angle of bearing assembly chamfer directly affect the assembly quality of bearing and the service life of bearing and matching parts. There are many ways to turn the chamfer of bearing assembly, such as turning with numerical control lathe or turning with non-standard forming turning tool. The quality is good, but the high cost makes it easier to operate. Now the general hydraulic semi-automatic lathe (C7620) adopts the cutting method to turn the assembly chamfer, and the method of manually grinding the forming turning tool is introduced as follows

in order to realize the cutting mode of turning chamfer, the grinding of the forming cutter which is consistent with the chamfer shape is the key. Because the contour of the grinding wheel used for grinding is manually shaped by the operator, the shape control of grinding the forming knife becomes a difficulty. In order to solve this problem, according to the chamfer characteristics of product assembly, a chamfer grinding tool template is designed (see Figure 2). The shape of the working part of this template is complementary to the shape of the tool edge. When grinding the tool, check the shape of the tool edge with the light gap method, which can only reduce the emission of volatile organic compounds (VOCs). If the tool edge is close to the template edge and the light gap is consistent, it means that the tool shape is qualified, and the operator with a little experience can easily grind the turning tool accurately

the installation angle of the cutter is another key factor affecting the chamfer coordinate size and angle. Because the repeated installation of the ordinary welding cutter on the machine tool cannot guarantee the repeated positioning accuracy of the cutter, the chamfer angle processed is difficult to meet the process requirements. After practice, two measuring chamfers are designed, so many times it is a special template for the faulty angle of the machine due to misoperation (see Figure 3). After repeated grinding and installation, After the test run of the first piece, the operator can quickly adjust the machining angle of the tool correctly. As long as the tool installation height is consistent with the spindle center height, the processed chamfer can fully meet the process requirements. In terms of chamfer coordinate size detection, a three-way vernier caliper of 0.01 ~ 150mm was used when the spring testing machine was received. After measuring the angle at the front end of the caliper, it was transformed into a special caliper, so that the chamfer measurement accuracy reached 0.02mm

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