ca6140车床的型号831002拨叉零件的机械加工工艺规程及夹具设计

ca6140车床的型号831002拨叉零件的机械加工工艺规程及夹具设计内容摘要：

夹紧力的作用点在Φ 60H12孔的 上下端面。 6. 夹紧力与切削力的计算 由于拨Φ 60孔在同一夹具上完成粗镗 半精镗加工 ,加工过程中不拆工件，且粗镗所需的力大于半精镗的力 ,所以确定夹紧力只需确定粗镗时所需的夹紧力 . 因为考虑到零件的夹紧需要轴向和径向定位，所以选用铰链需完整说明书和图纸找扣扣 二五一一三三四零八 14 杠杆夹紧机构，查表 101，夹紧力由于工件扩孔时所需的周向切削力远大于轴向力 ,故确定夹紧力时只需要计算粗镗刀作用在工件上的转距 ,轴向力可凭经验予以保证 . （ 1）切削力的计算，由 《 金属加工机械手册 》 查出，切削力P= ,其中 t=,s=,kp=k1 k2 k3 k4 k5而且对于镗刀 k1=,k2=,k3=,k4=,k5=,代入得kp= P= =204 =185N （ 2）夹紧力的计算 由《机械制造技术基础课程设计指导教程》表 101 可查出，夹紧力公式LfHKFLF ，其中 k=3,L=10,H=12,f=,代入公式得LfHKFLF = 夹 具休是夹具的基础件 ,夹具上所有的组成部分都必须最终通过这一基础件联接成一个有机整体 .夹具体必须有足够的刚度和强度、安装稳定、结构工艺性良好、便于清除切屑 . (1)夹具材料及制造方法 根据使用要求 ,夹具体用铸造方法制造 ,材料为 HT200. (2)夹具体外形尺寸 由《机械制造技术基准课程设计指导教程》表 111 可得夹具体的基本尺寸如下表 : 需完整说明书和图纸找扣扣 二五一一三三四零八 15 表 1 夹具体结构基本尺寸的经验数据 夹具体结构部分 经验数据 夹具体壁厚 h 25mm 夹具体加强肋厚度 16mm 夹具体加强肋高度 60mm 夹具体壁与壁连 接的铸造圆角 5mm （ 3） 铸造夹具体的技术要求 1） 铸件不许有裂纹、气孔、砂眼、疏松、夹渣等铸造缺陷。 浇口、冒口、结疤、粘砂应清楚干净。 2） 铸件在机械加工前应经时效处理。 3） 未注明的铸造圆角 R（ 35） mm。 4） 铸造拔模斜度（铸件在垂直分型面的表面需有拔模斜度）。 5） 由《机械制造技术基准课程设计指导教程》表 112 可得夹具体座耳结构尺寸如下表 : 螺栓直径 D D1 R R1 L H b 12 14 30 7 15 20 36 4 参考文献 1.《机械制造技术基础课程设计指导教程》 机 械工业出版社 邹青 主编 2.《机械制造技术基础》 机械工业出版社 于骏一 邹青 主编 3.《互换性与测试技术基础》 机械工业出版社 王伯平 需完整说明书和图纸找扣扣 二五一一三三四零八 16 主编 4.《切削手册》 机械工业出版社 艾兴 肖诗纲 主编 5. 《机械制造装备设计》 机械工业出版社 冯辛安 主编需完整说明书和图纸找扣扣 二五一一三三四零八 17 （英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of prehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen innerparty supervision of major initiatives. The two regulations supporting each other, the code adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard。 rule around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party anizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process。 the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party。 the third part introduces two party regulations modified the main changes and needs to grasp several key problems。 the fourth part on how to grasp the implementation of the two regulations of the party. code and Regulations revised the necessity and revised 需完整说明书和图纸找扣扣 二五一一三三四零八 18 history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and Chinese Communist Party discipline and Punishment Regulations column 1 by 2020 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation。 follow the correct direction, grasp the limited goals, adhere to the party39。 s leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the code and rule , reflects the party39。 s 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party39。 s eighteen years prehensive strictly practice. (a) revised two regulations of the party need of the ICAC guidelines in in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) based on revised, the promulgation and implementation of January 2020, to strengthen the construction of the contingent of leading cadres play an 需完整说明书和图纸找扣扣 二五一一三三四零八 19 important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too plicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice。 the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements。 the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat。 the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of countylevel leading cadres above. rule is in 1997 Chinese Communist Party disciplinary cases (Trial) based on revision, in December 2020 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the prehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition。 two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the 需完整说明书和图纸找扣扣 二五一一三三四零八 20 authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue。 third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to the criterion of a clean and honest administration and rule the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party passes party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on th。