CAJ | 학술논문

针对NKR轻卡前轴锻件热切边凹模断裂的问题，分析出模座结构不够合理是其主要原因。在改进模座结构的同时，采用了焊接修复工艺。介绍了修复工艺过程及其要点，包括开坡口及缺陷清理、预热、堆焊、焊后回火、切削加工等，重点介绍了交叉堆焊等焊接操作要点。修复后模具使用正常，修复费用仅为新制费用的22%，时间由原来的20天缩短为5天，表明修复工艺可行，可为类似模具失效修复提供参考。
침대NKR경잡전축단건열절변요모단렬적문제，분석출모좌결구불구합리시기주요원인。재개진모좌결구적동시，채용료한접수복공예。개소료수복공예과정급기요점，포괄개파구급결함청리、예열、퇴한、한후회화、절삭가공등，중점개소료교차퇴한등한접조작요점。수복후모구사용정상，수복비용부위신제비용적22%，시간유원래적20천축단위5천，표명수복공예가행，가위유사모구실효수복제공삼고。
In order to avoid the fracture of hot trimming die for an NKR light truck front axle forging, the main reason that the die holder structure is unreasonable was analyzed. The repair technology of welding was adopted while improving the die holder structure. The repair process and points were presented from the aspects of beveling and defect re?moval, preheating, surfacing, tempering after surfacing, cutting processing, especially the op?eration points of cross surfacing. The die can be normal used after repairing, and the re?pair cost only 22% of a new die and the time shortened to 5 days from 20 days.