Thermal extrusion forming device and process for steel diesel engine piston

A hot extrusion and diesel engine technology, applied in forging/pressing/hammer devices, manufacturing tools, forging/pressing/hammering machinery, etc., can solve the problems of inability to forge piston pin holes, low metal utilization rate, and high energy consumption of equipment and other problems, to achieve the effect of less forming process, high metal utilization rate and low comprehensive energy consumption

CN112222342AActive Publication Date: 2021-01-15ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-15

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Abstract

The invention provides a thermal extrusion forming device and process for a steel diesel engine piston. The device comprises a multi-direction forming extrusion device for extruding a metal blank to form a forge piece blank and a punching device for punching the forge piece blank. The device and process can achieve flash-free forge forming of the steel diesel engine piston and a piston pin hole can be formed. According to the process and device, most metal flow lines of the formed forge piece are reserved and are distributed along a contour of the forge piece, so that a stress state of a partin a using process is facilitated, and meanwhile, as the process and device need a short forming step, the forming equipment is relatively low in energy consumption and relatively high in utilizationratio of metals.
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Description

technical field

[0001] The invention relates to the technical field of metal hot precision forging forming, in particular to a steel diesel engine piston hot extrusion forming device and process. Background technique

[0002] The working environment of the piston in the oil extraction machine is very harsh, and it needs to bear the periodic mechanical loads such as high-pressure gas explosion pressure, inertial force, lateral pressure and friction force generated by high-speed reciprocating motion. As a result, the temperature of the piston rises, and the temperature distribution is very uneven, resulting in a large thermal deformation and thermal stress of the piston, and in severe cases, cylinder scuffing and locking will occur. At present, aluminum pistons have broad application prospects, but steel pistons must be used for diesel engines with combustion pressures exceeding 22Mpa and liter power greater than 100KW. According to data, the power of diesel engines using stee...

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are the Some embodiments of the invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Such as Figure 1-Figure 3 As shown, the steel diesel engine piston hot extrusion forming device in the present invention includes an upper die assembly, a lower die assembly, a left punch assembly, and a right punch assembly, wherein the upper die assembly includes an upper die 7, an upper die Base 8 and upper punch 9, wherein the upper die 7 in a semicircula...