Method for the production of a single part piston and a piston produced by such a method

An all-in-one, piston technology, applied in the direction of tools, pistons, manufacturing tools, etc. for lathes, can solve problems such as height restrictions, save tool costs, reduce manufacturing costs, and achieve the effect of manufacturing processes

Inactive Publication Date: 2013-08-28
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The height of the cooling channel is always less than twice the height of the groove between the piston crown and the piston skirt, so not only the height of this groove, but also the thickness of the tool used limits the height that can be achieved by the cooling channel

Method used

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  • Method for the production of a single part piston and a piston produced by such a method
  • Method for the production of a single part piston and a piston produced by such a method
  • Method for the production of a single part piston and a piston produced by such a method

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Embodiment Construction

[0016] figure 1 A one-piece forged piston blank 10 is shown, which is produced in the exemplary embodiment according to known forging methods. The profile of the finished piston 20 is indicated by dotted lines. The piston blank 10 comprises a piston crown 11 with a subsequent piston ring band 12, a piston skirt 13 and a piston pin seat 14 added to the piston crown 11, and can be made of forged steel or a light metal alloy, such as aluminum Alloy.

[0017] exist Figures 2 to 6 The method steps for producing the cooling channel 15 in the region of the piston ring 12 according to the invention are shown in .

[0018] In a first method step, the groove 16 is provided in the piston blank 10 by machining (in the exemplary embodiment by turning). The height of the groove 16 must only be such that the tool (in the exemplary embodiment a hook-shaped turning tool 17 ) can be moved in an arcuate swivel motion into the region of the cooling channel 15 to be produced during the rotati...

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Abstract

The present invention relates to a method for producing a single part piston (20) for an internal combustion engine from a piston blank (10), with a cooling channel (15) that is open in the downward direction running circularly inside a piston head (11), and an annular recess (16) built between the piston head (11) and a piston shaft (13), wherein the piston head (11) and the piston shaft (13) are connected to each other by means of a piston hub (14), and wherein the annular recess (16) and the cooling channel (15) are machined into the piston blank (10) by means of a cutting operation. According to the invention, it is provided that, for the cutting operation of the cooling channel (15), a tool (17) is moved into the area of the cooling channel (15) in an arc-shaped pivoting movement (A) through the recess (16), and that the cooling channel (15) is cut.

Description

technical field [0001] The present invention relates to a method for manufacturing a one-piece internal combustion engine piston having: a cooling passage extending annularly in the piston crown and opening downward; and an annular groove formed between the piston crown and the piston skirt, wherein the piston The crown and the piston skirt are connected to each other by means of an annular piston pin seat, and the annular groove and the cooling channels are added to the piston blank by machining, the outer contour is then machined and the cooling channels are closed. Background technique [0002] Such pistons cast from steel are known in practice. In order to include a closed cooling channel, a plurality of removable casting cores must be used here, which complicates the production process and increases costs. [0003] A one-piece piston machined from a cast piston blank is known from German Patent DE 100 13 395 C1. To produce the cooling channels, two different work step...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/10B23B1/00B23B5/00F02F3/22
CPCB23B27/04B23B2270/54B23P15/10B23B2215/245B23B27/06B23B2215/24F02F3/22Y10T29/49249B23B1/00B23B5/00
Inventor 马蒂亚斯·塞弗雷德
Owner MAHLE INT GMBH
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