机械制造技术课程设计-自行车右曲柄工艺及钻M14x1参考.doc

自行车右曲柄钻M14x1.25螺纹底孔夹具设计 摘 要 近年来随着机械行业的飞速发展，机械生产已从传统生产方式向机械自动化方式转换。为保证加工要求，需要设计与加工方式所对应的机床夹具。本次毕业设计研究的对象是自行车曲柄，主要任务是规划加工工艺和设计生产加工所需要的夹具。对于工装设计来说，制定加工工艺规程是非常重要的一步。首先要对曲柄进行全面的分析，确定曲柄的作用和曲柄基本参数。了解曲柄各个表面的加工要求，然后确定曲柄毛坯制造形式，毛坯的制造方式又和零件的材料、形状以及产量等方面因素有关。最后制定生产工序和加工要求。对于本次工装设计制定了三套夹具，包括一套铣床夹具和两套钻床夹具，设计一套夹具首先要考虑的是定位，必须限制所有需要限制的自由度。其次，是夹紧装置的选用，保证零件在加工过程中不受切削力的影响而发生任何方向的移动。同时还要计算夹具的定位误差，确定加工所用的机床和刀具。最后还需要对整个夹具的尺寸、形状和可行性等进行评估。 全套图纸，加 关键字 曲柄；夹具；加工工艺 Bike right crank tooling design Abstract In recent years, with the rapid development of mechanical industry，Machinery production from the traditional production methods to have mechanical automation way conversion.To ensure that the requirements of the processing,Need to design and processing methods corresponding machine tool fixtures.The graduation design research object is a bicycle crank,The main task is planning process and design production processing need fixture.For tooling design example,Make processing technology and procedures are very important step.First to crank on comprehensive analysis,To determine the role of crank and crank basic parameters.Understand each surface processing requirements crank,Then, to determine the crank blank manufacturing form,The manufacture of blank way and parts and materials, shape and production factors, etc.Finally make the production processes and processing requirements.For the tooling design made three sets of fixture,Include a milling machine fixtures and two sets of drilling machine fixture,Design a fixture should consider above all is the positioning,Must limit all need to limit of freedom.secondly,Is the choice of clamping device,Ensure parts in the machining process not by cutting force of the influence of the movement of the direction of any accident.Also the positioning error calculation fixture,Determine the machine tool and tools used processing.Finally also need to the fixture size, shape and feasibility evaluation, etc. Keywords crank; fixture;processing technology 目录 第1章