A cold heading manufacturing method for internal combustion engine tappets
A manufacturing method and technology of an internal combustion engine, applied in mechanical equipment, engine components, etc., can solve the problems of high cost, many processes, and low utilization rate of raw materials.
Inactive Publication Date: 2011-12-14
魏一波
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[0005] The method for manufacturing internal-combustion engine tappet cold heading provided by the present invention overcomes the disadvantages of many processes, high cost, high energy consumption, and low utilization rate of raw materials in the above-mentioned current manufacturing method.
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[0016] See attached figure 1
[0017] figure 1 The process of manufacturing internal combustion engine tappets by cold heading method: A, the bad material after blanking, the size of this blank is determined according to the volume requirements of the part; B: shaping the end face of the material to prepare for the next process; C: correcting The billet is reshaped, so that the end face of the billet is chamfered to prepare for the next step of stretching; D: Stretch the billet to obtain a pregnant blind hole. At the same time, the rounded corners of the inner bottom surface of the blind hole of the pregnant billet are obtained; E: Through forward extrusion, the inner bottom of the blind hole of the pregnant billet is formed into a boss; F: Finishing the blank to further improve the dimensional accuracy of the product.
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The invention discloses a cold heading manufacturing method of an internal-combustion engine tappet, comprising the following steps: A: blanking; B: shaping the end surface of the bad material; C: reshaping the blank to make the end surface of the blank inward Angle; D: Stretch the billet; E: Through forward extrusion, the inner bottom of the blind hole of the blank billet is formed into a boss; F: Finish the billet to further improve the dimensional accuracy of the product. The internal combustion engine tappet is manufactured by cold heading method, which has high dimensional accuracy and surface quality, low energy consumption, material saving and high work efficiency.
Description
technical field [0001] The invention relates to a cold heading manufacturing method, in particular to a cold heading manufacturing method of an internal combustion engine tappet. Background technique [0002] The tappet used in the gas distribution system of an internal combustion engine is a part with high technical requirements. It is a special-shaped part with thin walls, blind holes, and internal convex points. High dimensional accuracy and surface quality are required, as well as good mechanical properties. [0003] At present, the production of this part mainly adopts the method of multiple extrusion molding by hydraulic press. Since the dimensional accuracy and surface quality of the parts processed by hydraulic machine are relatively poor, subsequent machining is required to meet the dimensional accuracy and surface quality requirements of the part. [0004] Extrusion molding is adopted by a hydraulic press, which has many processes, high manufacturing cost and low ...
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IPC IPC(8): B21K3/00B21J1/00
Inventor 魏一波
Owner 魏一波