Machining technology of inner cone hole of main shaft
A processing technology and inner taper hole technology, which is applied in the processing technology field of the inner taper hole of the high-precision spindle, and can solve the problem that the spindle cannot be processed to meet the requirements of coaxiality.
Active Publication Date: 2012-12-12
成都新成量工具有限公司
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Problems solved by technology
However, in actual processing, the runout of the machine tool spindle is often greater than 2um, which determines that it is impossible to ensure that the machined spindle meets the required coaxiality requirements through the accuracy of the machine tool itself.
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[0006] specific implementation
[0007] 1. Rough machining of the main shaft parts made of bearing steel;
[0008] 2. Carry out heat treatment;
[0009] 3. Grinding the benchmarks at both ends of the spindle and fine grinding the outer surface of the work: two cast iron tops are machined on the lathe. The removed cast iron tip repeatedly grinds the datum center hole. Then put the main shaft on the precision cylindrical grinding machine, position and clamp with the two ground reference center holes, and the outer cylindrical surface of the grinding main shaft will beat when it sees the light. If the runout value is greater than 0.001mm, it means that the accuracy of the reference center hole at both ends of the spindle is not enough. Remove the spindle and put it back on the lathe to grind the reference center hole with a cast iron tip, and then put it on a precision cylindrical grinder to process the outer cylindrical surface for inspection. This is repeated until the outer...
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The invention relates to a machining technology of an inner cone hole of a main shaft. The machining technology is characterized by comprising the following steps: 1, firstly, rough machining parts of a main shaft which is made from bearing steel; 2, heat treating; 3, after the high-precision main shaft is semifinished, repeatedly grinding the standard of the two ends of the main shaft, and fine grinding a work outer circular surface till a jumping value is not more than 0.001mm; and 4, fine grinding the inner cone hole of the main shaft by adopting a top pulling method, connecting a fixed plate 1 to a rotating disc of a main shaft of a grinding machine by a screw bolt, clamping a pull plate 4 on the outer circular surface of the main shaft which is ground to be qualified, connecting the fixed plate 1 with the pull plate 4 by a spring 3, supporting a center bracket 6 on an outer circular surface which is ground to be qualified of the main shaft to be machined, detecting a bus at the front side of the outer circle of the clamped main shaft in a metering way before machining, repeatedly adjusting three screw bolts 5 of the center bracket 6, so that the center of the main shaft to bemachined is parallel with the movement direction of a workbench of a machine tool, and fine grinding the inner core surface of the main shaft. The machining technology is simple and convenient to operate, and is applied to the machine tool with the main shaft which jumps by more than 2 micrometers to machine the inner core hole of the high-precision main shaft, wherein the precision of the inner core hole is higher than that of the machine tool.
Description
Technical field [0001] The invention relates to a processing technology for a high-precision spindle inner taper hole. Background technique [0002] Currently, if figure 1 The difficulty in processing the main shaft parts is how to ensure that the coaxiality of the working inner cone and the working outer circle is 0.0015mm. The general spindle processing technology is to fine-grind the inner taper hole by clamping the outer circle at one end after positioning and grinding the outer circle at the two tops. However, in actual processing, the runout of the machine tool spindle is often greater than 2um, which determines that it is impossible to ensure that the machined spindle meets the required coaxiality requirements through the accuracy of the machine tool itself. Therefore, under the existing processing conditions, how to process a precision spindle that is higher than the precision of the machine tool itself is a difficult technology. Contents of the invention [000...
Claims
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IPC IPC(8): B23P15/00
Inventor 吴敏胡晓琴
Owner 成都新成量工具有限公司