How to Prevent Mold Deformation The causes of deformation in spinning molds are often complex, but if we understand the deformation rules and analyze the reasons, we can prevent mold deformation in advance, reduce and control the probability of deformation in spinning molds. In general, we can use the following methods to prevent the heat treatment deformation of precision and complex spinning molds. 1）Choose the suitable material. For the sophisticated molds, it is necessary to choose mold steel with excellent materials and fine deformation (such as air quenched steel). For section steels with high carbide segregation, moderate forging, quenching, and tempering heat treatment must be carried out. Improved mold steel, solid solution dual heat treatment. 2）Design a reasonable mold structure, mold can not too thick and the shape should be symmetrical. For molds with significant deformation, it is necessary to learn the deformation rules and set machining tolerances. 3）It is necessary to perform precise and complex preheating treatment on the mold to remove residual stresses generated during the processing. 4）Select the suitable heating temperature and control the heating rate. For sophisticated molds, balanced heating methods such as slow heating and preheating can be used to reduce mold heat treatment deformation. 5）Precooling, step-by-step cooling and quenching, and hot quenching are carried out on the premise of ensuring the hardness of the spinning machine mold. 6）For sophisticated molds, vacuum heating and quenching should be used as much as possible, followed by deep cooling treatment. 7）For some advanced molds, preheating treatment, aging heat treatment, tempering and nitriding heat treatment can be used to control the mold accuracy. 8）When repairing defects such as blistering, porosity, and wear in the mold, cold welding machines or other repair equipment with low thermal shock should be used to avoid deformation during the repair process. In addition, correct heat treatment process operations and moderate tempering heat treatment are also effective means to reduce the deformation of sophisticated molds.
