本科毕设论文_刹车保持架冲压成形工艺及模具设计外文翻译.doc

英文 Brake maintains a stamping forming technology and die design Brake cage, partially wrapped all or part of the roll body, and with the movement of the bearing parts, used to isolate rolling body, usually also guide and keep it within the bearing roller. Retainers material: rolling bearing at work, heat and wear caused by sliding friction bearing, especially under the condition of high temperature operation, inertial centrifugal force role exacerbated the friction, wear and heat, bracket will be caused serious burns or rupture, the bearing can work normally. Request retainers material, therefore, besides have a certain strength, must also have good thermal conductivity, small friction coefficient, good wear resistance, impact toughness, density is small and linear expansion coefficient and phase close to the roller. In addition, the press cage need to undergo complicated stamping deformation, also requires a material has good processing performance. First，Function and classification of bearing cage Keep bearing frame is one of the main parts, keep the aircraft in the rolling bearing has four basic functions: 1. Separation roller; 2. Will keep rolling element itself or keep it with a ring together; 3. Guidance on the right track roller rolling; 4. The orientation of rolling body, reduce the friction. According to the manufacturing process and materials used in cage can be divided into: stamping at low and medium carbon steel as the material of the cage; With high strength copper alloy (lead brass, nickel, silicon bronze, etc.), zinc alloy, ductile cast iron as the material of the alloy solid cage; Polyamide resin as material of engineering plastic cage; Phenolic laminated cloth tube as material entities phenolic bakelite retainer. Including punching cage with high production efficiency, qualitative light, intensity is good, wide coverage and widely used. Retainers are basic requirements of the design in a certain space and structure strength maxi