减速机外文翻译

减速机外文翻译内容摘要：

ings. Benchmark crude selection principle is: 1) the choice should be the processing surface is rough benchmark. Purpose is to ensure that machined surface and surface position relation of machining precision. If there are several without machining workpieces surface surface, you should choose the position precision of the machined surface and to demand higher surface as a benchmark. To wall thickness uniformity, less symmetrical shape, clamping and so on. 2) select machining allowance request even important surface as crude benchmark. Such as: machine tool lathe bed guide rail surface is one of the important surface volume of the rest of the uniform. So choose guideway as crude benchmark when processing, machining lathe bed base, benchmark to underside as fine processing guide surface. Evenly so that it can guarantee to get rid of less margin, make the surface retained and meticulous anization, to increase the wear resistance. 3) should choose machining allowance minimum surface as crude benchmark. So that we can ensure that the surface have enough machining allowance. 4) should choose as far as possible level off, smooth, the surface of the area is large enough as a crude benchmark, in order to ensure accurate clamping. Gate and riser, flash, burr surface should not be chosen for crude benchmark, the pretreating as needed. 5) crude benchmark should avoid repetition use, because thick benchmark mostly rough, irregular surface, used multiple times is difficult to guarantee the surface location of the precision. Enclosure crude benchmark selection requirements: in the guarantee the machining surface are the premise of machining allowance, uniform main hole machining allowance。 Should be loaded into the casing of the rotating parts and the enclosure walls have enough clearance。 In addition, should guarantee the reliable positioning, clamping. In order to meet the above requirements, choose the blank hole of the main hole of the as a general benchmark crude. Deceleration box body the processing of the first surface is the bination of cover or the base surface, due to separate the blank of bearing hole of the pore distribution in the cap and base on the two different parts is very irregular, so in the bination of top and bottom surface machining crude benchmark cannot use the main hole of the blank. But with the top and bottom as the crude benchmark. So that after the thickness of the flange joint surface processing. (2) fine benchmark Consider when choosing a fine benchmark principle focus is to ensure the machining accuracy of workpiece clamping and make accurate, stable and convenient. Fine benchmark selection principle is: Benchmark superposition principle. As far as possible choose design benchmark as locating datum. So that you can avoid locating datum and design datum don39。 t coincide and benchmark misalignment error. Benchmark unified principle. Should as far as possible choose unified locating datum. Benchmark of unity to ensure the position precision of between surface, avoid the error brought by the datum transformation, and the process adopted by the clamp is unified, thus can reduce the fixture design and manufacturing workMake it. For example: shaft parts are monly used pinhole as locating datum. Turning, grinding are top needle positioning, such not only can process in a clamping most surfaces, and to ensure the alignment of each cylindrical surface and end face and the axis of vertical degree. The principle of mutual benchmark. Selecting fine benchmark, sometimes two processing surface, can each other benchmark process over and over again. For example: after the quenching of gear grinding, based on tooth surface grinding inner hole, again based on hole grinding tooth surface, so that can guarantee the tooth surface uniform allowance. Productive base principle. Some finish machining or finishing machining operations require margin small and uniform, can choose the processing surface itself as a benchmark. For example: when grinding machine tool guideway, guideway is find. In addition, like holes in the centerless grinding machine grinding cylindrical, etc., are productive base of examples. In addition, still should choose high precision workpiece. Size large surface for reference, to ensure that the positioning is stable and reliable. And considering the workpiece clamping fixture design and processing is convenient, simple, etc. On the box body hole and hole, hole and plane, plane and plane has higher position accuracy between these requirements ensure and fine benchmark choice has a lot to do. To this end, usually preferred benchmark unified principle. Made with position accuracy requirement of most of the process, using the same set of benchmark location as much as possible. In order to avoid too many datum transformation and lead to the accumulation of error, and because the use the same benchmark, make fixtures used has similar structure and can reduce the fixture design and manufacturing work, reduce the cost. 2, on the surface of the main processing (1) body plane processing Body surface roughing and semifinishing often choose planing and milling. Planing housing plane39。 s main features are: cutting tool structure is simple。 Easy to machine。 Can use a few rest on planing machine, installed in a workpiece, processing several surface at the same time, so economic to ensure accuracy of the position of the surface. The productivity of planar milling of the higher than planing. In the batch production, often using milling. When the batch is bigger, often with a few on the multiaxis milling planer milling processing several plane at the same time, ensure the position precision of the plane between, and raised the productivity. Hole is processed Reducer casing ho。