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Piston for an internal combustion engine and method for its production

A technology of internal combustion engine and piston, applied in the direction of piston, manufacturing tools, mechanical equipment, etc., can solve the problems of high cost and high cost

Active Publication Date: 2013-05-29
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both methods are costly and therefore expensive

Method used

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  • Piston for an internal combustion engine and method for its production
  • Piston for an internal combustion engine and method for its production
  • Piston for an internal combustion engine and method for its production

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Embodiment Construction

[0026] Figure 1a with 1b A first embodiment 10 of a piston according to the invention is shown. The piston 10 is composed of a piston main body 11 and a piston ring member 12 . Both parts consist of steel (eg according to DIN EN 10083 or DIN EN 10267), which can be quenched and tempered and is suitable for friction welding.

[0027] The piston body in this embodiment is made of AFP steel. The piston body 11 has a piston skirt 15 , which in a known manner has a hub 16 and hub bores 17 for receiving piston bolts (not shown), and the piston skirt region 18 has a running surface (not shown). The piston ring part 12 in this embodiment is made of 42CrMo4. The piston ring part 12 has a piston crown 19 and a surrounding land 21 . The piston body 11 and the piston ring part 12 form an annular portion 22 for receiving a piston ring (not shown), forming a surrounding closed cooling passage 23 and a combustion chamber cavity 24 .

[0028] The piston body 11 and the piston ring part ...

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Abstract

The invention relates to a method for producing a piston (10, 110, 210) for an internal combustion engine from a first piston component (11, 111, 211) and a second piston component (12, 112, 212), characterized by the following method steps: (a) providing a blank (211') of the first piston component (11, 111, 211) made of a heat-treatable steel or a precipitation-hardening steel and having at least one joining surface (29, 31), (b) providing a blank (212') of the second piston component (12, 112, 212) made of a heat-treatable steel or a precipitation-hardening steel and having at least one joining surface (32, 33), (c) heat-treating the blanks (211', 212'), (d) connecting the blank (211') of the first piston component (11, 111, 211) to the blank (212') of the second piston component (12, 112, 212) by means of the joining surfaces (29, 31, 32, 33); thereof using friction welding in order to form a piston blank (210'), at least one friction weld (25, 26, 125, 226) and a heat-affected zone (30, 30') in the region of the at least one friction weld (25, 26, 125, 226) being formed in the process, (e) tempering or stress-relief annealing the piston blank (210) while preserving the heat-affected zone(s) (30, 30'), and (f) post-processing and / or finishing the piston blank (210') to form a piston (10, 110, 210). The invention further relates to such a piston (10, 110, 210).

Description

technical field [0001] The invention relates to a method of manufacturing a piston for an internal combustion engine, the piston consisting of a first piston assembly and a second piston assembly. The invention also relates to such a piston for an internal combustion engine. The invention also relates to a piston for an internal combustion engine, which consists of a first piston component and a second piston component, wherein the piston has a piston crown, a surrounding land and an annular part with an annular groove, and a piston skirt. Background technique [0002] Pistons for contemporary internal combustion engines are increasingly designed for less fuel consumption. Since the thermal and mechanical load on the piston is increasing in modern internal combustion engines, there is a risk that the piston does not receive an adequate oil supply during the operating phase of the internal combustion engine. This results in higher frictional loads. This results in greater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00B23K20/12B23P15/10C21D9/00C21D9/50
CPCF02F2003/0061B23K20/129C21D9/50C21D9/0068F02F3/003B23K2201/003F02F3/0092F02F3/22B23K2101/003Y10T29/49252Y10T29/49254B23P15/10B23K20/12C21D9/00F02F3/00
Inventor 赖纳·沙普克劳斯·克勒
Owner MAHLE INT GMBH