Because the titanium alloy casting molding will be formed after the uneven skin is hard and brittle, easily cause chipping phenomenon,which has become one of the most difficult removal of crusts in titanium alloy processing process. Recommend appropriate to increase the depth of rough machining first took the knife (2mm-4mm), to control the tip under the surface of the workpiece is Appropriate,to prevent direct contact with the tip and crusty chipping phenomenon.

The tool life can be improved by changing the geometric parameters of the cutting tool,After the study on the cutting edge of cemented carbide scrap parts found defects in cutting edge part of the design of new tools, namely the lack of transition and transition edge. This is the result of the main cutting edge strength is not enough, which leads to rapid tool wear, easy to appear the main reason why "tipping" phenomenon.

With the grinding out of plane arc transition in arc transition edge add cutting edges, to enhance the strength of the tip, which can solve the cutting edge is easy to wear, easy to chipping of the problem, but also improve the workpiece surface roughness and milling efficiency. At the same time reducing the knife at the tip of the cutting thickness for cemented carbide cutter, the formation of the machined surface the cutting thickness is small,which is conducive to the improvement of the surface roughness of the milling surface. In addition, also can grind out repair light cutter, and make it parallel to the surface, to fix the light surface effect, improve the quality of the machined surface.

The tool after repeated chipping and grinding, cutting and grinding will be exhausted only handle part; or because of improper operation caused in the process of using the tool directly from the hilt fracture. In this case, the effective length of the warp can use the remaining knife cutting, grinding, heat treatment and other processing methods the single pole forming, can be safe and effective in the clamping range, we can use the plane milling, groove cutting, chamfering, and can be used for boring the re using scrap cutter.

In order to increase the cemented carbide cutter rigidity and strength, heat treatment and surface coating of the corresponding parts, and special treatment of the cutting edge part. Using this approach, in order to make better use of the damaged cutter shank portion (YG hard alloy) into a single, through the heat treatment quenching will increase the cutting edge the hardness of 54-57HRC, so as to improve the service life of the cutter.

Posted by: hannahgwendolyn at 09:30 AM | No Comments | Add Comment
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