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Surface roughness selection method for machining of mechanical parts

November 29, 2022

Surface roughness of machined mechanical spare parts is an important technical indicator reflecting the error of micro-geometric appearance of the surface layer of mechanical spare parts, which is the main basis for checking the quality of the surface layer of the parts and is immediately associated with the quality of goods, service life and product cost. There are three ways to select the surface roughness of mechanical parts, i.e. calculation method, testing method and analogical method.

 

latest company news about Surface roughness selection method for machining of mechanical parts  0

A common application in the design of mechanical parts processing is the analogical approach, which is simple, fast and reasonable. The application of derivation must be well referenced and a wide variety of current mechanical construction design guides give a large amount of material and references. Commonly, surface roughness is compatible with dimensional tolerance levels. In general, the smaller the standard tolerances of mechanical parts are specified, the smaller the value of surface roughness of mechanical parts, but there is no fixed functional relationship between them.

latest company news about Surface roughness selection method for machining of mechanical parts  1

Mechanical parts processing strength is the ability of the parts in the work without rupture or plastic deformation beyond the permissible degree, it is the most basic provisions of all normal operation and production safety of the equipment. The standard countermeasures to improve the strength of the parts are: ① expand the specifications of the risk profile of the parts, effectively design the profile to expand the moment of inertia of the profile; ② choose high-strength raw materials, heat treatment process to improve the strength of raw materials and reduce thermal stress, manipulate the production process to reduce or remove microscopic shortcomings; ③ ensure that the load on the parts is reduced; ④ properly involve the structure of the parts to reduce the stress level, etc.