CAJ | 학술논문

螺距精度是丝杠磨削加工的重要指标，累积螺距误差对丝杠定位精度起着决定性作用。砂轮磨削丝杠产生的大量热量通过磨削接触区域按照一定比例传入工件，工件受热伸长而导致的丝杠滚道行程误差会直接反映在螺距误差上。基于若干简化条件，采用有限元法对磨削加工丝杠温度场进行瞬态热分析，并利用红外热像仪构建了磨削加工中丝杠温度测量实验系统，获得了可视化的丝杠热信息，分析了无冷却磨削时工艺参数对加工过程中不同时刻工件温度场分布以及热伸长的影响，有助于丝杠磨削加工的螺距精度控制。
라거정도시사강마삭가공적중요지표，루적라거오차대사강정위정도기착결정성작용。사륜마삭사강산생적대량열량통과마삭접촉구역안조일정비례전입공건，공건수열신장이도치적사강곤도행정오차회직접반영재라거오차상。기우약간간화조건，채용유한원법대마삭가공사강온도장진행순태열분석，병이용홍외열상의구건료마삭가공중사강온도측량실험계통，획득료가시화적사강열신식，분석료무냉각마삭시공예삼수대가공과정중불동시각공건온도장분포이급열신장적영향，유조우사강마삭가공적라거정도공제。
Pitch accuracy is one of the main indexes of screw form grinding because its accumulated error plays a decisive role in the positioning accuracy of ball screw.The great amount of heat produced in grinding is conducted into the workpiece through the grind-ing contact area proportionally,which causes the axial thermal elongation of screw and then deteriorates the screw pitch accuracy obvi-ously.Based on some simplified conditions,the finite element method was used to do transient thermal analysis on temperature field of screw.The infrared thermal imager was utilized to establish the experiment system for screw temperature measurement in grinding process.According to the thermal imagines of screw,the influence of machining parameters on the temperature distribution and thermal elongation of workpiece at different time in dry grinding was analyzed,which was helpful to ensure the pitch accuracy of ball screw.