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Method for manufacturing cooling channel piston

A technology for cooling channels and pistons, applied to pistons, machines/engines, mechanical equipment, etc., can solve problems such as weakened structures, losses, and negative impacts on manufacturing costs, and achieve the effect of reducing waste and reducing costs

Active Publication Date: 2017-03-22
KOLBENSCHMIDT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage here is that the introduction of the grooves by machining weakens the already sufficiently strong structure achieved by the forging method
In addition, the material of the piston blank is lost through machining, which has a negative impact on manufacturing costs

Method used

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  • Method for manufacturing cooling channel piston
  • Method for manufacturing cooling channel piston
  • Method for manufacturing cooling channel piston

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] The method according to the invention is in principle Figures 1 to 4 shown in . figure 1 In principle, a piston blank 1 is shown, which is produced by forging. Here, later functional elements of the piston are introduced, such as piston bottom, piston skirt, piston pin seat, piston bore and the like. Since the piston made later should be a cooling channel piston, follow the figure 2 The recess A is introduced into the piston blank 1 . The radially circumferential groove A is likewise introduced by forging, rolling or the like. In this case, the described method for introducing the recess A is carried out in such a way that a circumferential bead K (also referred to as shoulder) protruding radially beyond the outer diameter of the piston preform is produced here.

[0028] according to figure 2 , in a preferred embodiment, the groove A is introduced into the piston blank 1 in such a way that when viewed figure 2 At this time, a flange K is produced on the upper ...

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PUM

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Abstract

Method for producing a cooling channel piston (2) for an internal combustion engine, said cooling channel piston having a cooling channel (5) in its piston base, wherein a piston blank (1) is provided and processed by a forging method, a rolling method or the like Method A flange (K) protruding beyond the outer diameter of the later cooling channel piston (2) is formed on the piston blank (1) and radially encircling grooves (A) are introduced into the In a piston blank (1), it is characterized in that the radially circumferential groove (A) is introduced into the piston blank (1) by forging, rolling or the like and is formed in the next method step by making the flange (K) is deformed to cooperate with the surrounding groove (A) to form a cooling channel.

Description

technical field [0001] The invention relates to a method for producing a cooling duct piston and a cooling duct piston for an internal combustion engine produced according to the method. Background technique [0002] From EP 1 452 250 A2 it is known to produce a piston blank at least partially, preferably entirely, by forging. In this case, the functional elements of the piston, such as the piston base, the piston skirt, the piston pin seat, the piston bore and the like, are introduced into the piston blank. [0003] In the prior art, in the region of the refractory rim which is present when the piston is manufactured, a circumferential shoulder is likewise produced by forging approximately at the level of the first groove. The geometry of the shoulders is selected in such a way that sufficient material is available to close the recesses still to be introduced, which form the later cooling channels. In the upper or lower part of the shoulder, a groove with the upper and lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/10B21K1/18F02F3/22
CPCB21K1/185B23P15/10F02F3/22Y10T29/49249
Inventor R·布施贝克E·奥特利奇基
Owner KOLBENSCHMIDT AG