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Question:

The hole is 9.97, 0.03 margin, but also with 10H7 reamer to hinge it?

Mr. Cui, Kong is 9.97. I want to use my 10H7 reamer to reaming the hole with my hand. The book said that small or excessive margin will affect the reaming accuracy, then 0.03 of the margin can also be reaming to hinge it? I don't quite understand why the small margin affects the accuracy of reaming If so, what else would be done with thick hinges and precision hinges?.

Answer:

Each knife distribution margin will be not the same, you are asked to assign allowance Oh, recommended by electroplating diamond reamer, you do not know the accuracy is not high, if the demand is high, is recommended by electroplating reamer, it can be divided into coarse and fine reamer to hinge, to consult Henan stone diamond reamer.
Sorry, I just saw your question today. It might delay your work. I'm sorry.1. reaming is mainly to achieve a certain size accuracy, shape tolerances and surface roughness.2. reaming can not or difficult to correct position deviation.3. reaming is the use of multi blade, fixed diameter to ensure accuracy, less margin cutting and appropriate extrusion to improve surface roughness.4. most reamer because of the front angle is smaller, the rear angle is almost zero. The allowance is too long (for example, single-sided 0.015 mm), and it is difficult to cut or strip the excess material.5., if the surface roughness of the previous process is poor, it is difficult to meet the requirements by the extrusion peak.6. reaming can only improve the 1~2 level accuracy. So sometimes to coarse, fine hinge. But it can only reach IT6~7 level.7., when the smaller margin, rolling process can be used to improve the accuracy of the hole. It only causes surface hardening.
Each knife distribution margin will be not the same, you are asked to assign allowance Oh, recommended by electroplating diamond reamer, you do not know the accuracy is not high, if the demand is high, is recommended by electroplating reamer, it can be divided into coarse and fine reamer to hinge, to consult Henan stone diamond reamer.

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