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數控銑床的滑枕部分畢業設計

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數控銑床的滑枕部分畢業設計
目錄
摘　　要 - 2 -
一、畢業設計的基本要求和資料 - 5 -
二、電機的選擇及其參數 - 6 -
三、主傳動帶輪的設計過程及加工工藝 - 8 -
四、隔墊的設計 - 17 -
五、電機調整墊和支座的設計 - 17 -
六、主軸的設計過程及加工工藝 - 18 -
七、絲杠計算過程及加工工藝 - 21 -
八、軸承座設計 - 37 -
九、滑枕箱體設計 - 37 -
十、總結 - 38 -
十一、參考文獻 - 39 -
摘　　要
隨著機械加工行業的快速發展，對機床設備要求越來越高，數控機床已廣泛應用。
1、在機床傳動系統中，同步帶傳動應用越來越廣。因為它把摩擦傳動改善為嚙合傳動，避免了打滑，傳動精神準確，效率高，傳動比大，功率高。現在已初步系列化，標準化，帶輪和同步帶可以直接購買。
2、軸用來支承回轉零件或同時傳遞運動和動力，軸的結構設計就是確定軸的外形和全部結構尺寸。影響軸的結構因素很多，如軸在機器中的安裝位置形式；作用在軸上的載荷性質、大小；零件在軸上的位置及其和軸的聯接方式；軸的加工工藝和裝配工藝等，所以軸沒有標準的結構形式，設計時應對不同情況進行具體分析。對一般軸的結構設計要求是：1）軸和軸上零件有準確的工作位置；2）軸上各零件應有可靠的相對固定；3）良好的制造和安裝工藝性；4）形狀、尺寸應有利于減少應力集中。
3、滾珠絲杠傳動是在絲杠和螺母之間放入適當數量的滾珠，使絲械和螺母之間的摩擦由普通絲杠的滑動摩擦改善為滾動摩擦的一種螺旋傳動裝置。其作用是裝旋轉運轉變為直線運動，它由滾珠絲杠、螺母、滾珠、滾珠循環返回裝置等零件組成。其特點為：摩擦小，逆正效率高；磨損小，壽命長；通過預緊可消除軸向間隙，提高傳動精度；不自鎖；結構較復雜，工藝性差，成本高。
4、零件加工應遵循基本的機械加工順序安排：先粗后精，先面后孔，先主后次，基面先行，熱處理按段穿插，檢驗按需安排，完善加工工藝體系可以保證和提高產品的質量，提高勞動生產率，降低成本。

關鍵字：同步帶　　滾珠絲杠　　脹套　　螺母　　粗糙度　　配合
Summary
Process the fast development of the profession along with the machine,Is more and more high to equipments of machine tool request,NC machine toolalready extensive applied,output of it is growing rapidly.
1.In the system of machine tool for transmitting devise,belting in step have applicated more and more wide.Because it spread the friction moving improvement as the wheel gear moving,avoid beating to be slippery,moving is accurate,the efficiency is high,the ratio is big,the power is high.Xow they have already in first standarded.Gears and beltings in step may purchase directly.
2.The shaft is used to accept the turn-over spare parts or to deliver powered motion and the motve in time.the axial construction design is to makes sure the axial shape and all sizes constructions.The factors influencing The axial construction are many,such as stalk at gearing in the machine position with form、Function or charge on the stalk is the kind and the sizes of it、parts in the position no shaft and the method of engagingi to the shaft、Properties processing and assembing etc.So the shaft has no standarded construction.Request of deigning the general shaft condtruction have these that the shaft and parts in it contain accurate work position,parts in shaft should be fixed oppoditly in the position, Properies well manufacturing and processing, the shape、sizeshould benefit to decrease“stress raisers”.
3.Improve transmission precision and rigidity enter the system of giving the baoo silk pole nut (enter give system sharply) , worm gear worm (circumference enter give system) and support structure to determine their transmission preeision and main part or rigidity, must guarantee machining accuracy of them at rirst, for adopt walk into electrical machinery drive turn on the ring system especially so. In enter for the drive chains to join and moderate the gear wheel, can reduce pulse equivalent, can improve the preeision of the trandmission from the point of what has been designed. In addition can also adopt dispelling the ball silk pole nut vice axial transmission interval clocely in advance rational; Support the bearing of the silk pole in order to improve the structure rigidity supported closely in advance; Dispel gear wheel, worm gear, etc.transmit interval among, measure these is it improve transmission precision to help. Rigidity is entered insufficiently for the system to make the workingbench (or tow the board) produce creeping and vibration. For adopt cylinder is it enter give system to drive ,because compression of rluid rigidity very much low, must limit the greatest journey of its cylinder.

Key words

Belting in step screw bulge set nut finish fit
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