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From the above two test cases, after the diameter of the tap is increased by 0.01 mm and the diameter is increased by 0.02 mm, all the holes except the 6007 are processed, which may be due to the large jump of the 6007 spindle, which leads to the two test stops. 2 buckles and 4 buckles. After the diameter of the tap is increased by 0.01 mm, the life of the tap is increased from 25 to 220, and the life of the tap is greatly improved. The change of the diameter of the tap has a significant effect on the life of the tap itself.
In order to find out the most economical and suitable tap diameter and tap material, and accumulate experience in MJ thread processing, on January 14, 2000, we set up another 400 taps with a medium diameter of 0.015 mm. Waiting for the experiment.
2 Japanese OSG taps
The tool is sensitive to temperature changes. In summer, the maximum temperature of a single knife can produce 20 to 300 pieces, but in winter, only 60 to 70 pieces can be produced, and the surface roughness of the machined threaded holes is high. The tap material is H SS E (cobalt-containing high-speed steel), the surface is not coated, the life is about 20 pieces, the surface roughness value is relatively low, and the new arrival of a batch of tap processing pieces can not enter the situation. .
3 Wuxi new era tap
Ordinary high-speed steel taper can produce 50 ~ 60 pieces with one knife, but the quality of the tool is different, the processing size is very unstable, and there are often 1 / 3 tool threaded holes in 12 tools installed at one time. Not qualified. Due to the unstable quality of the products processed by this tool, the effect after the test is not obvious.
4 Zhuzhou Diamond Carbide Taps
In Zhuzhou, 30 pieces of carbide drills with a medium diameter design were set up for experiments. According to the production statistics, more than 2,200 qualified holes have been processed and continue to be used, and the surface roughness of the machined tapped holes is low.
It can be seen from the above experiments that the high-speed steel taper and Zhuzhou diamond hard alloy tap designed by Dongfeng Company's measuring instrument factory are relatively successful. The carbide tool is 20 times the unit price of ordinary high-speed steel tool, but the cemented carbide The service life is dozens of times that of high-speed steel, which greatly reduces the cost and improves the economic efficiency.
In summary, a reasonable tool design can improve the utilization of the tool, and the use of advanced tools is of great benefit to improve product quality and reduce costs.
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