注射模齿条斜导柱齿轮脱螺纹机构设计  

Design of injection mould with thread demoulding mechanism for rack angle pin

作　　者：臧建所[1] 邵芝梅[1] 张振金[1] 

机构地区：[1]黑龙江科技大学机械工程学院,黑龙江哈尔滨150022

出　　处：《模具工业》2015年第12期36-39,共4页Die & Mould Industry

基　　金：黑龙江省教育厅科学技术研究项目(12543061)

摘　　要：以注射模自动脱螺纹机构为研究对象,提出齿条斜导柱概念,对其倾角β、受力、长度等进行了分析和设计,研究了轮齿的接触线长度、接触应力随时间变化的规律,并建立了数学模型。通过与齿条导柱齿轮脱螺纹机构比较,齿条斜导柱齿轮自动脱螺纹机构在实现自动脱螺纹功能的基础上,还能保证啮合轮齿接触线长度、接触应力恒定,对有效预防啮合轮齿的点蚀、局部断齿等具有重要意义,提高了自动脱螺纹机构的使用寿命和模具零件工作的可靠性。Taking an injection mould with automatic thread demoulding mechanism as re- search object, the concept of ＂rack angle pin＂ was proposed. The obliquity, force, length were analyzed, the variation of contact line length, tooth contact stress with time was stud- ied, and the mathematical model was established. On the basis of realizing automatic thread demoulding, the mechanism could ensure the constancy of meshing tooth contact line length and contact stress compared to the thread demoulding mechanism with rack guide pin. It effectively prevented meshing gear from pitting and local teeth broking.

关 键 词：注射模 脱螺纹机构 齿条斜导柱 套筒螺母 接触应力 

分 类 号：TG241[金属学及工艺—铸造] TQ320.669[化学工程—合成树脂塑料工业]