How To Solve The Plastic Hair Clip Mold Processing Defects
How to solve the Plastic Hair Clip mold processing defects
In the Plastic Hair Clip melting and Plastic Hair Clipizing process, the Plastic Hair Clip mold is prone to defects, the solution is: the heat treatment after the quenching stress to a minimum, because the quenching stress, reticulated carbonization in the role of grinding force, the organization produced Phase change can easily cause cracks in the workpiece. Reasonable use of cooling lubricating fluid, play the cooling, washing, lubrication of the three major role, to keep the cooling lubrication clean, so as to control the grinding heat within the allowable range to prevent the workpiece thermal deformation.
1, to improve the cooling conditions when grinding, such as the use of oil-immersed grinding wheel or internal cooling wheel and other measures. The cutting fluid into the center of the grinding wheel, cutting fluid can be directly into the grinding area, play an effective cooling effect, to prevent the workpiece surface burns. Reasonable use of cooling lubricating fluid, play the cooling, washing, lubrication of the three major role, to keep the cooling lubrication clean, so as to control the grinding heat within the allowable range to prevent the workpiece thermal deformation.
2, the heat treatment after the quenching stress is reduced to a minimum, because the quenching stress, mesh carbonized structure under the action of the grinding force, the organization can produce phase change easily crack. For high-precision molds in order to eliminate the residual stress of grinding, after grinding should be low-temperature aging treatment to improve toughness.
3, to eliminate the grinding stress can also die in the 260 ~ 315 ℃ salt bath for 1.5min, and then cooled in 30 ℃ oil, so that the hardness can be reduced 1HRC, residual stress decreased by 40% to 65%.
4, for the dimensional tolerance of 0.01mm within the precision molds precision grinding to pay attention to the impact of ambient temperature, requiring constant temperature grinding. It can be seen from the calculation that 300mm long steel parts, the temperature difference of 3 ℃, the material has about 10.8μm change, (10.8 = 1.2 × 3 × 3, per 100mm deformation of 1.2μm / ℃), the finishing process must be fully considered The influence of this factor.
5, the use of electrolytic grinding to improve the mold manufacturing accuracy and surface quality. Electrolytic grinding, the grinding wheel scrape off the oxide film: rather than grinding metal, grinding force is small, grinding heat is also small, will not produce grinding burr, cracks, burns and other phenomena, the general surface roughness can be better than Ra0 .16μm; In addition, the wear of the grinding wheel is small, such as grinding carbide, the wear of silicon carbide grinding wheel is about 400% to 600% of the weight of the cemented carbide grinding, grinding with grinding, grinding wheel wear The amount of carbide grinding only 50% to 100%.
First, choose the appropriate child's Plastic Hair Clip: choose Plastic Hair Clip to fit the needs of children of different ages, suitable for children's psychological, physiological characteristics of age. For example, the child before the age of 1, that organs and activities can be relatively weak, so this stage of the purchase of Plastic Hair Clip should help to enhance the child's color, spacing, sound and other visual and auditory can carry out the main , Like color balloons, small bells and so on.
Second, the choice of Plastic Hair Clip must pay attention to safety and health: bought Plastic Hair Clip should be non-toxic and sterile, easy to clean; Plastic Hair Clip edge to be a moderate, no hard sharp angle. On the young children, do not give them to play glass balls, Plastic Hair Clip balls and other small children, so as not to accidental attacks in the population. Some Plastic Hair Clip speed too fast, or easy to hurt others, purchase and use should be brought to the attention.
Third, to prevent one-sided pursuit of high-grade, Plastic Hair Clip is not the more high-grade the better: In fact, many high-grade electronic Plastic Hair Clip, because of its "automation" level is too high. Children often become ordinary audiences, so that they can not start training in mind; the same time, high-grade Plastic Hair Clip function is too single, easy to constrain the child's imagination. On the slightly larger children, can buy some more conducive to the development of smart Plastic Hair Clip.
In short, the Plastic Hair Clip is the best tool for the development of children's intelligence, for different age children choose the appropriate Plastic Hair Clip, not only make the child's life full of happiness.More importantly, the development of the child's intelligence