E-MAIL : toy@lovelybird.com.cn 

Foshan jigsaw puzzle: how to reduce the defects in the jigsaw puzzle toy mould processing?

by:Lovelybird Toys     2020-12-01
Foshan jigsaw puzzle the author today for you about how to reduce defects in the jigsaw puzzle toy mould processing and come and stay to see oh! After heat treatment of quenching stress reduced to a minimum, because quenching stress, reticular tissue under the action of the grinding force, carbide organization transformation to make the workpiece to produce crack. The rational use of cooling lubricant, cooling, washing, lubrication should play the role of the big three, keep clean, cooling and lubrication to control of grinding heat within the scope of the permit, to prevent thermal deformation. Specific 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, prevent the workpiece surface burn. The rational use of cooling lubricant, cooling, washing, lubrication should play the role of the big three, keep clean, cooling and lubrication to control of grinding heat within the scope of the permit, to prevent thermal deformation. 2, after heat treatment of quenching stress reduced to a minimum, because quenching stress, reticular tissue under the action of the grinding force, carbide organization transformation to make the workpiece to produce crack. For high precision mould in order to eliminate the residual stress of the grinding, the grinding should be done after aging treatment of metal in order to improve the toughness at low temperature. 3, eliminate grinding stress can also will die in 260 ~ 315 ℃ in the salt bath soak 1. 5 min, and then in 30 ℃ oil cooling, so can drop 1 HRC hardness, residual stress reduced by 40% ~ 65%. 4, for the size tolerance in 0. Precision mould precision grinding within 01 mm attention should be paid to the influence of environment temperature, requires constant temperature grinding. The calculation shows that 300 mm long steel, temperature 3 ℃, the material has 10. The change of around 8 microns, ( 10. 8 = 1. 2 * 3 * 3, each 100 mm 1 deformation. 2μm/℃) , the machining process are required to fully consider the influence of this factor. 5, the electrolytic grinding processing, improve the mould manufacturing precision and surface quality. Electrolytic grinding, grinding wheel shaving oxide film: instead of grinding, metal and small grinding force, grinding heat is small, won't produce the phenomenon such as grinding burrs, cracks, burns, surface roughness can be better than Ra0 commonly. 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 only hard alloy grinding in addition amount of 50% ~ 100%. Got here today's article, you can get it? As you have for jigsaw puzzle where don't understand or need, you are welcome to inquire or to focus on our close network!
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...