機(jī)械類中英文翻譯(已修改)
2024-11-18 04:41 本頁面
【正文】 英文原文 Cams Various motions can be produced by the action of a cam against a timing devices are operated by can purpose of andy cam is to produce a displacement of its follower。a secondary follower is often .used to produce additional displacement in another most popular type is the plate cylindrical type is used to transmit linear motion to a follower as the cam cam are sometimes used。these provide some unusual follower motions,but also make follower design camshaft in the automotive engine illustrates a simple but important application of a late cam assemblies in automatic record players illustrate a somewhat more plex application. Cam profiles are accurately constructed by either praphical or mathematical transitiom from development drawings to working (shop) drawing can be made in several ways: a fullscale is desirable from the manufacturing standpoint,but it will not guarantee accurate cam profiles. radial is fairly accurate,but sometimes produces layout problems in the shop. coordinate procedure will ensure accuracy. In selecring one of these methods,one should consider the function of the cam in terms of desired preciseness. Because the cam work outline already determined, therefore the cam structural design mainly was determines the curve outline axial thickness and the cam and the drive shaft connection way. When the work load pares the hour, curve outline axial thickness generally takes for the outline curve biggest radius of vector 1,/10 ～/5。 Regarding a stress bigger important situation, must with carry on the design according to the cam contour surface from the contact intensity. When determination cam and drive shaft joint way, should synthesize the consideration cam the assembling and dismantling, the adjustment and firmly grades the question. Regarding implementing agency more equipment, between its each execution ponent movement coordination usually determined by the cycle of motion chart, therefore in assembly cam gear time, the cam contour curve initial station (pushes regulation starts) the relative position to have according to the cycle of motion chart to carry on the adjustment, guarantees each execution ponent to be able according to the preset sequence synchronized action. Therefore, requests the cam in the structural design to be able to be opposite to the drive shaft carries on the rotation along the circumference direction, and reliably performs fixedly. The simplest method uses the clamping screw nail fixed cam, or with clamping screw nail pre fixed, after treats adjusts uses the pin to be fixed again. From structural design: from structure: When design must consider from the guidance and prevented revolves. From movement rule design: Involves many aspects from the movement rule design the questions, besides consideration rigidity impact and flexible impact, but also should maximum speed vmax which has to each kind of movement rule, maximum acceleration
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