CAJ | 학술논문

在数控机床的直线电机进给系统运行中，绕组线圈发热、铁心磁滞发热及其他机械摩擦发热，会导致温升过高，产生热变形，从而影响工件加工精度。添加相变材料的高孔隙率泡沫金属三明治复合结构不仅能有效地减轻结构的质量，而且具有良好的热特性。将三明治复合结构形式应用于对数控机床的直线电机进给系统的改进设计中，通过对多孔金属和相变材料的分析，动子底板采用铝金属泡沫为基体、并填充石蜡（熔点为27～28℃）的三明治复合结构，在金属泡沫芯的外围通过钢板进行覆盖及密封。该结构在受热情况下在一定的时间范围内可保持在恒温状态不发生变化，有利于减小机床的热变形，提高加工精度。
재수공궤상적직선전궤진급계통운행중，요조선권발열、철심자체발열급기타궤계마찰발열，회도치온승과고，산생열변형，종이영향공건가공정도。첨가상변재료적고공극솔포말금속삼명치복합결구불부능유효지감경결구적질량，이차구유량호적열특성。장삼명치복합결구형식응용우대수공궤상적직선전궤진급계통적개진설계중，통과대다공금속화상변재료적분석，동자저판채용려금속포말위기체、병전충석사（용점위27～28℃）적삼명치복합결구，재금속포말심적외위통과강판진행복개급밀봉。해결구재수열정황하재일정적시간범위내가보지재항온상태불발생변화，유리우감소궤상적열변형，제고가공정도。
When the linear motor feed system of Computer Numerical Control (CNC)machine tool was in the operation process, its temperature rise may be too high and thermal deformation produced because of the winding coil heated,iron core hysteresis heated and other mechanical friction heated and so on,thereby the machining accuracy of workpiece was affected.The weight of the structure could not only be reduced by the sandwich composite structure with high porosity rate metal foam filled with phase change materials (PCM),but also had excellent thermal characteristic.The sandwich composite structure form was applied to the improvement design of linear motor feed system for CNC machine tool.By analyzing of the porous metal and phase change materials,the mover baseboard used a sandwich composite structure which took aluminum metal foam as base and filled with wax (melting point was at 27 ~28 ℃), and the periphery of metal foam core was covered and sealed by steel plates.The structure will keep unchanged in a constant tempera-ture condition for a certain period of time while heated,which is in favor of reducing the thermal deformation of the machine tool and improving the accuracy of machining.