How to prevent die grinding damage

Die performance processing needs to go through a number of procedures, grinding is one of processes.  That is to use the method of forming grinding to punch, concave die and convex and concave die parts for finishing, is commonly used at present, is also very effective processing method.  The characteristics of forming grinding is called forming grinding, which is to decompose the complex forming surface into a number of simple surfaces, such as plane, cylinder, etc., and then segmented grinding, and make its connection smooth, rounded, so as to meet the requirements of the drawing.  
                                   

Different processing methods have different effects, such as the use of electrolytic grinding processing, improve mold manufacturing accuracy and surface quality.  In electrolytic grinding, the grinding wheel scrapes the oxide film instead of grinding metal, so the grinding force is small, the grinding heat is small, and there will be no grinding burrs, cracks, burns and other phenomena.  

However, we should pay attention to avoid some influencing factors in processing, so the following measures can be taken:  

1. Rational use of cooling lubrication fluid, play the three roles of cooling, washing and lubrication, keep the cooling and lubrication clean, so as to control the grinding heat within the allowable range, in order to prevent thermal deformation of the workpiece.  

2. To improve the cooling conditions during grinding, oil-sand wheel or internal cooling grinding wheel can be used.  By introducing the cutting fluid into the center of grinding wheel, the cutting fluid can directly enter the grinding zone to play an effective cooling role and prevent the workpiece surface from being burned.  

3. For precision grinding of precision die casting dies with size tolerance within 0.01mm, attention should be paid to the influence of ambient temperature and constant temperature grinding is required.  

4, reasonable selection of grinding dosage, the use of small radial feed grinding method or even fine grinding.  If the radial feed and grinding wheel speed are properly reduced and the axial feed is increased, the contact area between grinding wheel and workpiece is reduced and the heat dissipation condition is improved, so as to effectively control the increase of surface temperature.