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车刀粗车堆焊件和锻打毛坯时,最感头痛的是硬质合金车刀崩刃和打刀问题,既造成刀片的大量消耗,又影响生产率。下面根据个人的实践,谈点崩刃和打刀的原因及改进方法。 1.毛坯表面粗糙不平、变形、偏心以及余量和硬度不均、工件和刀具装夹不牢等,都会造成切削力的波动和冲击。改进方法:注意堆焊和锻打手法、位置,采用缓冷或退火,降低和减少内应力,最好采用振动焊堆焊,工件和车刀要装夹牢靠。 2.刀片焊接不牢,刃磨后产生裂纹,刀片材材选择不当。
Car roughing Overlay welding and forging rough, the most troublesome is the carbide cutting edge and knife hit the knife, both cause a large number of blade consumption, but also affect the productivity. The following based on personal practice, talk about the reasons for chipping and playing knife and improve the method. 1. rough rough surface roughness, deformation, eccentricity and unevenness and uneven hardness, workpiece and tool clamping is not strong, etc., will cause the cutting force fluctuations and impact. Improvements: Pay attention to surfacing and forging tactics, location, using slow cooling or annealing, reduce and reduce internal stress, the best use of vibration welding surfacing, workpiece and turning tool to be firmly fixed. 2. Blade welding is not strong, sharpening cracks, blade material selection is not appropriate.