【導(dǎo)讀】參閱有關(guān)技術(shù)手冊(cè)，制定了機(jī)械加工工藝路線，確定了各工序尺寸和加工余量。通過(guò)計(jì)算確定了切削余量和基本工時(shí)，并制定了機(jī)械加工工藝過(guò)程卡片。為了給生產(chǎn)的計(jì)劃、調(diào)度、工人的操作提供依據(jù)，提高勞動(dòng)生產(chǎn)率，保證加工質(zhì)量，降低勞動(dòng)強(qiáng)度，根據(jù)加工需要設(shè)計(jì)了一套工裝夾具。關(guān)于中國(guó)汽車產(chǎn)業(yè)的現(xiàn)狀，從兩個(gè)角度來(lái)說(shuō)，宏觀角度與微觀角度。中國(guó)加入世貿(mào)組織，我國(guó)的汽車進(jìn)口關(guān)稅就一直在下調(diào)，這是履行WTO的義務(wù)，同時(shí)也是為了進(jìn)一步鼓勵(lì)競(jìng)爭(zhēng)，優(yōu)化中國(guó)市場(chǎng)?？梢哉f(shuō)，中國(guó)的汽車企業(yè)就是在夾縫中生存。在2004年11月22日，東風(fēng)標(biāo)致實(shí)施降價(jià)補(bǔ)償?shù)匿N售策略，引起了中國(guó)汽車行業(yè)的軒然大波。從一個(gè)側(cè)面反映了近幾年中國(guó)汽車市場(chǎng)競(jìng)爭(zhēng)之激烈。2004年統(tǒng)計(jì)資料顯示，中國(guó)汽車的虧損面達(dá)到了16%之多。為了降低成本，占領(lǐng)市場(chǎng)，要達(dá)到高質(zhì)量，低成本的要求，進(jìn)而對(duì)零部件提高了要求。

　　

【正文】 ion bination. spare parts and integrated spare parts careful choice. a function design with the orientation production line and decline low cost. to make parts accurate to position in the assemble with with each other not interferenceMechanical DesignThe whole machine design is a plicated the personnel have to at thus of realm, such as calm down mechanics, kinetics, dynamics and material mechanics have good cultivated manners, have to also acquaint with manufacturing material and make a craft in the personnel has to can bine all related facts, carrying on Teaches Wei and creating grass diagram and graphics to e to deliver the manufacturing request to the car.The square one that any product designs works it an is the material that the choice useds for making each design personnel of today can get an choosing, function, external appearance, material cost and manufacturing costs of product are all very to be careful to evaluate the function of material before any calculation.It is necessary a careful calculation with the usefulness of insuring the to never appear on the diagram, but from ten various reason be the whichever parts loses efficacy, will clear up to do what while designing this defective spare parts at the beginning。And, can acquire an experience document from pute past needing the design for ising similar to, the past record will have a tremendous help.The check of puting(with diagram top size) is the most decimal point39。s mislaying position can ruin an original and acceptable example, if a person wants to design a bracket that can prop up 100 pounds, but it should can prop up 1000 pounds originally, the result affirmation will square aspect noodles had to check a check to design again a work.The calculator speaks to is an of great use tool for the staff member, can ease a dull calculation and provide to expand analysis to the existing data. Hand over system to make the calculator assistance design(CAD) with each other according to the calculator function and the calculator lend support to a manufacturing(CAM) to make thus of system, may conceive outline a first step to deliver to beat bore paper to take to used for numeral to process control but need not to draw formal construction diagram.The machine design for the laboratory test, model and kind machine is very laboratory provided a lot of build up basic concept need of information, however, can also acquire with them some concerning product how on the spot would the understanding for working.Finally, a design personnel of success should offer the step that the utmost effort keeps up with appear new material and produce a method painting and design personnel39。s don39。t acquainting with modern method and material may put out good design personnel should usually read technique periodical to keep up with a new developmentThe engineering work is bad The solid is made sure boundary by its surface model ground, design a personnel to specify Mr. to call size to a spare parts to make it contented its because of the surface irregular and proper surface rough degree, each spare parts can39。t make into Mr. to call size39。s hasing to allow size to have some varieties can make with insuring , the variety allowed can39。t certainly too big with as for make to assemble the function of the piece to bee the variety allowed by spare parts is called business trip.Business trip this technical term not only is applicable to from the acceptable scope of the parts size of[with] manufacturing craft creation, but also is applicable to a machine or processes of example, a give already set number of thepower each pedestals of . engine have , we usually discover this kind of variety model will be a frequency to distribute curve, for example distributes.(call the Gauss distribute again)One of the work which designs a personnel is the variety which specifies size for a spare parts and allows, this value canproduce acceptable function.Spare parts business tripWhen there is no appointed accurate size in the diagram, most organizations all have in general use business trip of being applicable to the process size, in general use business trip39。s maying be a 177。 is being specified to millimeter scopes of sizes can be of in general use business trips can be applicable to such as the angle and drill a hole with blunt bore, The casting, the forging, the welded joint and weld the angle） etc. situation.Can make reference to the diagram of past or general engineering to practice while giving the appointed business trip of a spare business trip of typical model39。s ising specified is martial bee JSO standard define of to settle business trip to 1, for example H7/s 6, can use for being studying of spare parts size having 1 set and chart to shoulding of this will give concerning pack into inside bore of the concrete example with the stalk or the pillar form match.The standard match of bore and stalkA standard of the engineering work is the business trip which makes sure a pillar form spare parts, installing for example in a tube form spare parts or bore for corresponding is the stalk which revolves in its inner part to match with of loose be decided by application tightly for example, a wheel gear which positions on the stalk needs to betight of quiet match, here stalk of the diameter pares wheel gear actually of inside path a little bit a little bit big in order to can deliver need of Torque .Furthermore, the diameter of glide bearings has to be big in the diameter of the stalk to make it the supposition that speak to can39。t bee the accurate size to the parts manufacturing from the economy, all of the variety of stalk and bore size have to make , variety of scope shouldn39。t the too big in order to prevent assemble hour damaged