【文章內(nèi)容簡介】 夾緊力的作用點在Φ 60H12孔的 上下端面。 6. 夾緊力與切削力的計算 由于撥Φ 60孔在同一夾具上完成粗鏜 半精鏜加工 ,加工過程中不拆工件，且粗鏜所需的力大于半精鏜的力 ,所以確定夾緊力只需確定粗鏜時所需的夾緊力 . 因為考慮到零件的夾緊需要軸向和徑向定位，所以選用鉸鏈需完整說明書和圖紙找扣扣 二五一一三三四零八 14 杠桿夾緊機構(gòu)，查表 101，夾緊力由于工件擴孔時所需的周向切削力遠大于軸向力 ,故確定夾緊力時只需要計算粗鏜刀作用在工件上的轉(zhuǎn)距 ,軸向力可憑經(jīng)驗予以保證 . （ 1）切削力的計算，由 《 金屬加工機械手冊 》 查出，切削力P= ,其中 t=,s=,kp=k1 k2 k3 k4 k5而且對于鏜刀 k1=,k2=,k3=,k4=,k5=,代入得kp= P= =204 =185N （ 2）夾緊力的計算 由《機械制造技術(shù)基礎(chǔ)課程設(shè)計指導(dǎo)教程》表 101 可查出，夾緊力公式LfHKFLF ??，其中 k=3,L=10,H=12,f=,代入公式得LfHKFLF ??= 夾 具休是夾具的基礎(chǔ)件 ,夾具上所有的組成部分都必須最終通過這一基礎(chǔ)件聯(lián)接成一個有機整體 .夾具體必須有足夠的剛度和強度、安裝穩(wěn)定、結(jié)構(gòu)工藝性良好、便于清除切屑 . (1)夾具材料及制造方法 根據(jù)使用要求 ,夾具體用鑄造方法制造 ,材料為 HT200. (2)夾具體外形尺寸 由《機械制造技術(shù)基準(zhǔn)課程設(shè)計指導(dǎo)教程》表 111 可得夾具體的基本尺寸如下表 : 需完整說明書和圖紙找扣扣 二五一一三三四零八 15 表 1 夾具體結(jié)構(gòu)基本尺寸的經(jīng)驗數(shù)據(jù) 夾具體結(jié)構(gòu)部分 經(jīng)驗數(shù)據(jù) 夾具體壁厚 h 25mm 夾具體加強肋厚度 16mm 夾具體加強肋高度 60mm 夾具體壁與壁連 接的鑄造圓角 5mm （ 3） 鑄造夾具體的技術(shù)要求 1） 鑄件不許有裂紋、氣孔、砂眼、疏松、夾渣等鑄造缺陷。澆口、冒口、結(jié)疤、粘砂應(yīng)清楚干凈。 2） 鑄件在機械加工前應(yīng)經(jīng)時效處理。 3） 未注明的鑄造圓角 R（ 35） mm。 4） 鑄造拔模斜度（鑄件在垂直分型面的表面需有拔模斜度）。 5） 由《機械制造技術(shù)基準(zhǔn)課程設(shè)計指導(dǎo)教程》表 112 可得夾具體座耳結(jié)構(gòu)尺寸如下表 : 螺栓直徑 D D1 R R1 L H b 12 14 30 7 15 20 36 4 參考文獻 1.《機械制造技術(shù)基礎(chǔ)課程設(shè)計指導(dǎo)教程》 機 械工業(yè)出版社 鄒青 主編 2.《機械制造技術(shù)基礎(chǔ)》 機械工業(yè)出版社 于駿一 鄒青 主編 3.《互換性與測試技術(shù)基礎(chǔ)》 機械工業(yè)出版社 王伯平 需完整說明書和圖紙找扣扣 二五一一三三四零八 16 主編 4.《切削手冊》 機械工業(yè)出版社 艾興 肖詩綱 主編 5. 《機械制造裝備設(shè)計》 機械工業(yè)出版社 馮辛安 主編需完整說明書和圖紙找扣扣 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 需完整說明書和圖紙找扣扣 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 需完整說明書和圖紙找扣扣 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 需完整說明書和圖紙找扣扣 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