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How to reduce the defects appeared puzzle toy production process

by:Lovelybird Toys     2020-12-01
After heat treatment of quenching stress reduced to a minimum, due to quenching stress, reticulate carbide organization under the action of the grinding force, organization transformation to make the workpiece to produce crack. Reasonable use smooth liquid cooling, cooling, washing, smooth should play the role of the three, insist on cooling smooth and clean, so as to control the grinding heat in the allowed range, in order to avoid thermal deformation puzzle toys. Detailed operation is as follows: 1, improve the cooling conditions when grinding, such as by oil immersion wheel or the cooling grinding wheel and other measures. The cutting fluid into the center of the grinding wheel, cutting fluid can be directly into the grinding zone, give play to the role of effective cooling, avoid burns jigsaw appearance. Reasonable use smooth liquid cooling, cooling, washing, smooth should play the role of the three, insist on cooling smooth and clean, so as to control the grinding heat in the allowed range, in order to avoid thermal deformation. 2, after heat treatment of quenching stress reduced to a minimum, due to quenching stress, reticulate carbide organization under the action of the grinding force, organization transformation to make the puzzle toys produces cracks. About high precision mould in order to eliminate residual stress of grinding, after grinding should stop aging disposal to progress toughness at low temperature. 3, grinding stress alleviation mould will also be in 260 ~ 315 ℃ in the salt bath soak 1. 5 min, and then in 30 ℃ oil cooling, so drop 1 HRC hardness, residual stress reduced by 40% ~ 65%. 4, about the size tolerance in 0. Precision mold precision grinding within 01 mm to pay more attention to the influence of environment temperature, the request temperature grinding. The calculation shows that 300 mm long steel, temperature 3 ℃, 10. The change of around 8 microns, the finishing process must be energetic to think the influence of the elements. 5, the electrolytic grinding processing, improve the precision of mould manufacturing and appearance quality. Electrolytic grinding, grinding wheel shaving oxide film: instead of grinding metal, so small grinding force, grinding heat is small, also won't produce the phenomenon such as grinding burrs, cracks, burns, surface roughness can be superior to ordinary Ra0. 16μm; In addition, the grinding wheel wear small, such as grinding hard alloy, silicon carbide grinding wheel wear is about for grinding of cemented carbide of the weight of 400% ~ 600%, electrolytic grinding, grinding wheel wear is as long as hard alloy grinding in addition amount of 50% ~ 100%.
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