機(jī)械類中英文翻譯-文庫吧資料
2024-11-10 04:41本頁面
【正文】 llower is the reciprocationg type that merely moves up and down (or in and out ) with the rotation of the cam。the groove in the periphery of the cam should be shaped to acmodate the type of cam is expensive to cylindrical cam has two outstanding is the fact that the cam is positive outside forces (such as gravity or spring action ) are needed to hold the follower against the working surface of the second feature is the fact that the follower can move through a plete cycle in the course of several revolutions of the example,it is possible to design the cam so the follower could move from a starting position at the left end to the extreme right position in three revolutions( or more),then the starting position in two variations are possible. A translation cam is the figure shown the cam reciprocates horizontally and the follower moves up and pivoted follower can be used with this type .The translation cam can be made positive by providing a guided plate with an inclined slot for the cam。 From ravelling schedule: In pushes in the regulation or the return trip from the biggest displacement, indicated with h。 Nearly stops the angle: With from nearly rests the cam corner which the regulation corresponds。 Far stops the angle: With from far rests the cam corner which the regulation corresponds。 2) translation cam. (2) space cam gear according to from movement vice element shape classification (1) apex from。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。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。 Regarding a stress bigger
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