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    來源:http://www.thinkgreeninitiative.com/ 發布時間:2022-02-15
    The geometric accuracy of parts includes the accuracy of size, shape and surface position. The frequently checked items include dimension, cylindricity, roundness, flatness, straightness, coaxiality, parallelism, perpendicularity and runout. According to the characteristics of maintenance, sometimes the geometric dimension of a single piece is not required, but the relative matching accuracy is required.
    The surface quality of parts includes surface roughness and whether there are scratches, corrosion, cracks, falling off, scorching, bite and other defects on the surface.
    In addition to the hardness and the depth of hardened layer, the physical and mechanical properties such as stress state, equilibrium state, elasticity, stiffness and vibration formed during the manufacturing and repair of parts shall also be properly tested according to the situation.
    The hidden defects of parts include internal slag inclusion, pores, pores, voids, welds and other defects in the manufacturing process, as well as micro cracks in the use process.
    The mass and static balance of parts, such as the mass difference between piston and connecting rod, and the static balance of crankshaft, fan, shaft, wheel and other high-speed rotating parts.
    Material properties of parts, such as alloy composition of parts, carbon content of carburized layer, uniformity of materials of all parts, removal of graphite in, aging and deterioration degree of rubber materials, etc.
    The above is the knowledge brought to you today. CNC door and window equipment has focused on the industry for many years and continuously provides users with valuable content. Please continue to pay attention to us for more content: http://www.thinkgreeninitiative.com