Mechanical fit issues
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To understand the tolerances of a machine part and how to address fit issues, one needs to know that.
First, determine the fitting relationship between the equipment and components, then consult the mechanical design manual!
“The phrase “a mechanical tolerance” is inappropriate; it should refer to the tolerance of a specific dimension of a part. .....
For mechanical tolerance fits, reference can be made to mechanical design manuals for general applications; for special equipment, some experience is required in making decisions.
Is there any error in the way the original poster has broken down the text? It is guessed that the key terms here are: tolerance fit. Generally, it is determined based on the function of the parts and the processing conditions, with reference to the standards in mechanical manuals as well as empirical data. Therefore, it requires learning and experience; only through long-term study can one understand this properly.
Based on the application scenario, determine the type of fit (interference, transition, clearance); then, using that fit type, identify the specific tolerances for the mating parts. This information is generally available in mechanical design manuals. This post was last edited by qjm655@sohu.com on 2009-3-7 00:15.]
Check the mechanical design manual; there are electronic versions available for download.
It is recommended that the poster install a mechanical design manual (software version) to directly look up the tolerance fits for the required dimensions
http://bbs.hcbbs.com/thread-74025-1-6.html The poster can take a look at the Illustrated Manual on Tolerances and Fits
The tolerance fit between components must be determined based on the motion relationship between the workpieces; otherwise, it is difficult to achieve good performance； Additionally, you can also determine the fit according to the manual to ensure that the workpiece meets the functional requirements
OP, the determination of mechanical fit tolerances mainly depends on the actual usage requirements of the parts. Many manuals specify the preferred choices for tolerance fits. As the seniors above have said, once the usage requirements are determined, you can check the mechanical design manuals – there are two versions available, published by the Mechanical Industry Press and the Chemical Industry Press. All are available; they’re all on the forum. Or go to this address: http://www.bzfxw.com/soft/sort011/sort040/4032077.html http://www.bzfxw.com/soft/sort011/sort040/4035873.html
First of all, it’s not mechanical tolerances; it should be the dimensional tolerances of mechanical parts. There are three types of coordination. Clearance. Transition. Interference fit. I’m not sure what kind of fit is required for your so-called parts; could you check the manual? You can also check out (the mechanical CAD forums); there should be relevant information there as well
It’s a simple question; anyone in the machinery field knows it.