ca6120活塞工藝規程及夾具的設計畢業論文-資料下載頁

　　

【正文】 沒注意到的，一當在車間的師父加工就必然發現，因為有很多時候產品的不合格就可能是差了那么一點點！還知道了產品的一般工藝流程。三、存在的不足及建議通過這次實習，我感覺到了自己還有很多不足：專業知識還不是很扎實，特別是公差方面的，為了讓設計出來的產品達到要求而一味的加大精度，給制造帶來了難度；實際操作能力不夠，現在是技術更新的時候，公司都引進了很多先進的生產設備，但自己對這些高新設備束手無策；初到公司缺乏工作經驗，很多的工作感到無從下手，沒有一個完整的頭緒，很難單獨去接受一個實際的課題。雖然自己只工作了兩個月，但還是感覺到了學校和公司之間有很大的差距。如果能縮小這種差距的話，對以后學校就業將有很大優勢，更對學生能夠很快融入工作環境打下堅實的基礎。我就以過來人的身份建議學校能夠更加注重學生的實際動手能力，加強學生的實踐能力的培養，如增加學生的在校實習的機會和延長學生的實踐活動的時間，更加注重在老師的指導下讓學生真正的參與到實踐中去。附錄一In the mechanical product design the ponents processing craft reasonable is deficientThe mechanical product design is a plex the question which manuscript must consider have been very many. How in satisfies the machine function and under the performance requirement premise, enable the ponents to have the good structure technology capability to have the vital significance. The structure technology capability good ponents not only process easy, the cost low twenty pairs to enhance the product the operating performance and the precision and the enterprise productivity have the vital role. How does the author discuss from the product design angle enable the ponents through the reasonable dish structural design to have the good machinefinishing technology capability 1 semifinished materials the choice semifinished materials is only the ponents embryonic form, is the work piece bees the end product by the raw material first step. Semifinished materials choice including material and manufacture method choice and its shape and size determination. It affects the ponents entire processing craft manuscript finally to relate the ponents the processing technology capability, the processing cost and the productivity. Reasonably chooses the semifinished materials not only is the craft personnel39。s hundred million products designs the personnel to be also noticeable correct determinations semifinished materials shape and the size basis enhance the productivity the principle, □must as far as possible enable it in the determination ponents semifinished materials shape and the size to approach to the ponents shape and the size, has avoided the high roughness, like this may reduce the machinefinishing the work load to be advantageous for enhances the productivity. This mainly considered in the technological design stage that, should choose more advanced semifinished materials to make Fang? in the volume production its effect especially remarkable reasonable determinations semifinished materials knot □semifinished materials structure mainly the ponents structure restriction, simultaneously to makes the performance to have a bigger shade therefore must give the enough value in the product design stage. Generally may use according to the structure difficulty degree and the operation requirements merges and deposes manages soon several structures simple ponents merge is zero imitates may reduce the machined surface and the attire clamps decides the sequence order or certain single units merge is size bigger semifinished materials, then carries on the machining, sometimes very is advantageous to the guarantee processing precision. If the lathe guide screw nut the tile and the piston curl system □may first cast overall semifinished materials and the long sleeve. the tile in processes to the certain stage time splits two half。 In after the sleeve, the outer diameter processing is qualified adds again on the lathe □gradually cuts certain thickness even piston curls 2 ponents structures Jan Nicong processes the angle to consider that, the ponents structural stress requests the Jan minister machined surface to design the plane, the round cylinder as far as possible and so on the simple geometry surface, also may use according to the structure characteristic divides the writing style and gathers the writing style in order to processes ponents fissions to tie □some ponents to use the minute writing style structure processing to acmodate the sleeve ponents which □like chart 1 shows, if designs, must process the ball face shape bottom surface in the hole which the park (a) shows is more difficult. In order to be advantageous for the processing and measured may depose the structure the sleeve and the ball bottom surface supports two, like chart 1 (b) inlays the ball bottom surface processing in the cushion in the sleeve 3 reduced processings ponents structural design to be supposed again to reduce as far as possible the machined surface the quantity and the surface □not only may reduce like this the process load, but also may reduce time the assembly to make repairs □also is advantageous to the guarantee assembly quality. If the park shows the structure has the coordination in the axis two sections of different diameters place round cylinders to want □also has 2 struts end surfaces contact. This kind of structure formed has surely caused to have large scale to increase the ponents processing precision also the assembly precision also with difficulty guarantees shifts simultaneously increased the processing difficulty and the work load. If changes the structure which the park (b) shows, is only photogenic in the identical diameter round cylinder the coordination, axial only has a localization end □both to be possible to avoid the localization like this creating is unreasonable □and the reduced processing surface quantity and the precision work area4 envies in seals the angle in the internal surface to add □generally shifts the ponents interior surface to be inferior to exterior face work conveniently, but in on half seal internal surface processes then is sleepier therefore should avoid as far as possible. If the park for inlays casts the type wheel, the wheel rim inlays in if will design the wheel rim in on, will be able to cause the processing survey not to be convenient, will be very difficult to guarantee the processing precision and the smooth finish request. Also like chart 7 shows structure, when design should avoid in the box body 1 seal the end surface on I carrying on the processing, mainly is processes sleepily therefore, imitates the beginnings and ends I should design the non machined surface, makes it 22 end surfaces to maintain the suitable crevice. If engine hole in end surface and