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Abstract：
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Connected perch of 45# steel is a typical kind of deep hole and thin wall partIn the past, it is the complex process that the roughcast is turned into part by boring and machiningThrough the analysis for connected perch in this paper,the projects of cold extrusion technology are advanced and the forming process of deep hole is introduced Furthermore,the problem of how to prevent 45# steel with bad plasticity from deforming and cracking and the extrusion measures for the extrusion part with excess ejecting stroke is stated. Based on those dada, the author programs the whole structure of mould and designs the parts of mould for working partsFinally,the feasibility of process is tested by experimentThe problems are construed and relevant improved measures are brought upIt is certain that the application of cold extrusion process for connected perch has a reference value to the forming of similar part
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AuthorIntro：
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Reference：
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