Method for processing chain through hole by using cold extrusion process
A process processing and cold extrusion technology, applied in the field of chain-through cold extrusion forming, can solve the problems of waste of raw materials, difficult processing, and increased cost, and achieve the effects of reducing production costs, high production efficiency, and ensuring product quality.
Inactive Publication Date: 2011-08-31
蒋永宋
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Problems solved by technology
[0002] Liantong is a kind of industrial and mining accessories, which is a cylinder with a central through hole; traditionally, Liantong is generally manufactured by turning and drilling methods, which has many procedures, difficult processing and low efficiency, and traditional processing methods will cause The weight of the cut material is greater than the weight of the product after molding, which will cause waste of raw materials and increase the cost
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[0012] Such as figure 1 As shown; the present embodiment selects PC100-5 link, and its cold extrusion steps are as follows:
[0013] First of all, it is blanking, and the round steel billet 1 of predetermined volume is lowered;
[0014] Then rough extrusion, the round steel billet 1 is packed into the rough extrusion mold, after the mold is closed, the rough extrusion part 2 with a blind hole 21 at one end is extruded at a speed of 3MM / S with a pressure of 500T; After the mold is opened, the formed rough extrusion part 2 is ejected out of the mold with the ejector rod; that is, the rough extrusion process is completed;
[0015] Punching again, after the rough extrusion process is completed, then the punching process is carried out; the rough extrusion part 2 is put into the punching die, the blind hole 21 is punched into a through hole 31 with a punch, and the rough formed part 3 is obtained. ;
[0016] The last is fine extrusion. Put the punched rough-formed part 3 into th...
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The invention discloses a method for processing a chain through hole by using a cold extrusion process. By the method, raw materials can be saved, the production cost can be reduced, and the quality of a product can be improved. The shape of the chain through hole is a cylinder with a central through hole. The method comprises the following steps of: firstly, blanking a round steel blank with a preset volume; secondly, roughly extruding the blank to obtain a roughly extruded piece with a blind hole at one end; thirdly, punching the piece to punch the blind hole of the roughly extruded piece; and finally, finely extruding the piece, loading the punched roughly extruded piece in a finely extruding die to perform fine extrusion molding and obtaining a chain through hole blank with a through hole. In the chain through hole produced by the method, the volume of a metal is plastically transferred on the premise of not damaging the performance of the metal, so the metal is shaped with few cutting processes and no cutting process; a large number of metal waste scraps formed in the cutting process are avoided; steel and various metal materials are saved; and the method has the advantages of high production rate, high precision and the like.
Description
technical field [0001] The invention relates to a chain-link cold extrusion forming method. Background technique [0002] Liantong is a kind of industrial and mining accessories, which is a cylinder with a central through hole; traditionally, Liantong is generally manufactured by turning and drilling methods, which has many procedures, difficult processing and low efficiency, and traditional processing methods will cause The weight of the cut material is greater than the weight of the product after molding, which causes waste of raw materials and increases the cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for processing chain links by cold extrusion process, which can save raw materials, reduce production costs, and improve product quality; the shape of chain links is a cylinder with a central through hole; the process of the present invention It mainly includes the following steps: [0004] St...
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Inventor 蒋永宋
Owner 蒋永宋