数控轴承座球面孔镗床的结构设计.doc

PAGE  PAGE  PAGE 6 数控轴承座球面孔镗床的结构设计 潘继超1，周有华2，李自立1，吴铁成1 （1.新乡日升数控轴承装备股份有限公司,河南 新乡 453700; 2.泛科轴承集团有限公司,福建 泉州 362300） 摘要：本文通过对比分析两轴插补和单轴摆动这两种方式在加工轴承座球面孔时刀具轨迹的形成原理，论述了后者在机械结构上容易形成轮廓精度更高的圆弧轨迹，进而加工出球形误差更小的球面孔。在此基础上，介绍了采用刀具单轴摆动成形原理设计的数控轴承座球面孔镗床。该设备能够自动化上下工件，一次装夹自动完成轴承座的粗镗底孔、粗镗球面、镗油槽及精镗球面等工序，在提高加工精度及稳定性、降低人力成本、节约能源消耗等方面具有明显优势，为轴承座加工行业实现一人操作多机的自动化生产模式奠定了基础。 关键词：带座外球面轴承;轴承座;球面孔; 镗床;刀具轨迹;两轴插补;单轴摆动 Structural Design of CNC Boring Machine for Spherical Surface Bore of Bearing Housings Pan Jichao1, Zhou Youhua2, Li Zili1, Wu Tiecheng1, (1Xinxiang Sunrise CNC Bearing Equipment Co., Ltd., Xinxiang 453700,China; 2 FK Bearing Group Co., Ltd., Quanzhou 362300,China ) Abstract: In this article, through contrast analysis of the forming principle of two axis interpolation and single axis swing in processing the bearing seat spherical hole of tool path, discusses the single axis swing is easy to form higher profile accuracy of arc track in the mechanical structure, and then processed smaller spherical error of the spherical hole. On this basis, introduces the CNC bearing seat tool spherical hole boring machine which designed by using toll single axis swing forming principle. The device is capable of automatic loading and unloading, automatically complete the bottom hole rough boring, spherical rough boring, oil groove boring and spherical finish boring of bearing seat in once clamping, it has obvious advantages in improve machining precision and stability, reduce the manpower cost, save energy consumption and other areas, to lay the foundation for the multi-machine with one operator automatic production pattern in bearing seat processing industry. Key words:insert bearing with housing; bearing housing; spherical surface bore; boring machine; tool path; two-axis interpolation; Single-axis swing 1轴承座球面孔的加工 1.1球面成形原理分析 球面的形成可以看作是一条圆弧母线沿一个圆形导线运动的轨迹，加工方法大致分为四种：成形法、仿形法、范成法和刀尖轨迹法[1]。成形法受刀具刃口损耗影响大，一般用于内球面孔的粗加工；仿形法受靠模板精度影响大，适用场合与成形法类似；范成法成形精度高，一般适用于内球面孔的磨加工。刀尖轨迹法则应用广泛，粗精加工皆宜，本文主