托辊管体夹具设计说明书.docVIP

摘 要 托辊是带式输送机的关键运动部件及重要组成部分，种类多，数量大。它占了一台带式输送机成本的35%，承受了70%以上的阻力，因此托辊的质量尤为重要。 托辊的作用是支撑运送带和物料质量，托辊运转必须安全可靠，减小运送带与托辊的摩擦力，这对于占运输机总成本25%以上的运送带的寿命起着至关重要的作用。虽然托辊在带式输送机是一个小部件，结构并不复杂，但制造出高质量的托辊并非易事。 托辊的生产属专业化大批量生产类型，那就要求其加工设备和辅助装备能满足大批量生产的要求。对于夹具来说，应从提高定位精度、减短装夹时间、使装卸自动化、采用多工位加工等方面考虑来实现大批量生产。本设计课题主要研究能实现四个托辊加工的夹具。四个托辊在有四根主轴的专用镗床上同时加工，要求托辊夹具能同时对四个工件准确定位、快速夹紧；实现不同系列托辊的加工；并且能在长度方向对中，高度方向既可以大幅度调整，也可以进行微调。为了满足上述要求，该托辊夹具采用自定心夹紧机构，让定位夹紧同步进行；利用液压的同步保压回路实现四个工件的同时夹紧；该夹具有效的减少了工件加工的辅助时间，提高了加工效率。除了让夹具满足上述要求外，还应尽量使夹具快速准确定位夹紧，以节省辅助时间提高自动化程度，减轻劳动强度；尽量结构简单，操作方便。本设计中通过自动定心夹紧机构来让定位夹紧同步进行；利用液压系统实现四个工件的同时夹紧，该夹具有效的减少了工件加工的辅助时间，提高了加工效率。 关键词：托辊；夹具；镗床；液压回路 ABSTRACT Belt conveyor roller is the key to moving parts and an important part of many kinds of large quantities. It accounts for the cost of a belt conveyor 35 percent, to bear more than 70% of the resistance, so the quality of the roller is particularly important. The role is to support the roller conveyor belt and material quality, and must be safe and reliable operation of the roller, belt and roller transporting reduce the friction, which accounted for 25% of the total cost of transport of the conveyor belt over the life plays a critical effect. Although roller belt conveyor is a widget, the structure is not complicated, but produce high-quality roller is not easy. Idlers are specialized mass production type, it requires its processing equipment and auxiliary equipment to meet the requirements of mass production. For the fixture, it should improve positioning accuracy, less shorts clip time to make handling automation, multi-bit processing and other considerations to achieve mass production. This design can achieve four main research topics roller machining fixture. Four rollers in a four spindle boring machine at the same time processing requirements roller fixture can simultaneously work on four accurate positioning, fast clamping; achieve different series idlers processing; and in the length direction, the height substantial adjustments