PCD刀具前刀面焊后抛光试验研究

Research on polishing of front surface after welding of PCD tools

通过3因素4水平正交试验,研究PCD刀具热损伤层的布轮抛光去除工艺参数对PCD刀具前刀面表面粗糙度变化的影响规律。试验结果表明:粗糙度变化随转速增大先增大后减小,随压缩量增大先增大后减小再增大,随抛光时间延长先增大后减小。同时,建立三元二次粗糙度变化值预测模型,分析布轮转速、压缩量、抛光时间对粗糙度变化值的影响程度。结果表明:布轮转速对粗糙度变化值的影响最大,压缩量的次之,抛光时间的最小;布轮转速、压缩量、抛光时间与粗糙度变化值的相关性比较显著,且粗糙度变化值预测模型与试验数据的拟合效果较好。

Three-factor four-level orthogonal experiments were first conducted to study the influence of technical parameters on surface roughness of PCD tools during the cloth-wheel polishing process which removes thermal damage layer of PCD tools.The test results show that the roughness changing value increases at first and then decreases with the increase of rotation speed;the roughness change value increases at first and then decreases,and increases again as compression amount increases;the roughness changing value increases at first and then decreases with polishing time extending.In the following,the influence degree of cloth-wheel speed,compression amount and polishing time on the changing value of the roughness is analyzed,and a ternary-quadratic prediction model of roughness changing value is established.The results show that the rotation speed of cloth wheel has the greatest influence on roughness changing value,followed by the compression amount,and the polishing time is the smallest;the correlation between the rotation speed,compression amount,polishing time and the roughness changing value is significant,and the model of roughness changing value fits well with experimental data.