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Supporting rolling post and method for correcting crankshaft journal cylindricity

A technology of crankshaft journal and support roll, which is applied in the field of crankshaft processing, can solve the problems of weakening rolling strengthening effect, inability to roll convex correction and straightening, adverse effects of rolling strengthening, etc., and achieve the effect of weakening rolling strengthening effect

Inactive Publication Date: 2015-05-27
BINZHOU HEAD CRANKSHAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing support rollers 3 are cylindrical, such as Figure 4 As shown, when the rolling protrusion rotates to the position of the supporting roller 3 along with the crankshaft, the cylindrical supporting roller and the rolling protrusion are only in point contact, and the force that the supporting roller 3 acts on the rolling protrusion is very small. Small, it can only be used as a support, and it cannot correct and straighten the rolling protrusions. It can only be straightened for the rolling protrusions, but the straightening treatment will often cause disadvantages to the rolling reinforcement belt. impact, which will weaken the rolling strengthening effect

Method used

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  • Supporting rolling post and method for correcting crankshaft journal cylindricity
  • Supporting rolling post and method for correcting crankshaft journal cylindricity
  • Supporting rolling post and method for correcting crankshaft journal cylindricity

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Embodiment Construction

[0040] In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

[0041] Such as figure 1 As shown, a support roller for correcting the cylindricity of a crankshaft journal according to the present invention includes a support roller 3, the support roller 3 includes a cylindrical part in the middle and a curved surface part in the end, during the rolling process The part of the curved surface at the end is in line contact with the rolling protrusion of the journal of the crankshaft 2, which can increase the contact area between the supporting roller 3 and the rolling protrusion, thereby increasing the force of the supporting roller 3 on the rolling protrusion, Under the action of high contact stress, the supporting rollers rotate continuously with the rolling process of the crankshaft journal, and gradually correct the rollin...

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Abstract

The invention relates to the technical field of crankshaft machining, in particular to a supporting rolling post and a method for correcting crankshaft journal cylindricity. The supporting rolling post comprises a cylindrical part positioned on the middle part and a rotary curve surface part positioned on the end part; in a rolling process, the rotary curve surface part on the end part is in contact with a crankshaft journal rolling bump line. The supporting rolling post and the method have the advantages that rolling bump caused by plastic deformation nearby a crankshaft journal fillet can be corrected, and then the crankshaft journal cylindricity is corrected.

Description

technical field [0001] The invention relates to the technical field of crankshaft processing, in particular to a support roller and a method for correcting the cylindricity of a crankshaft journal. Background technique [0002] Automobile engine emission standards have become the focus of the global automobile industry. Low emission and less pollution are the inevitable trend in the development of automobile engines. With the development of cold technology, the fatigue strength of the engine crankshaft is getting higher and higher. The corresponding crankshaft strengthening process has been developed rapidly in recent years, and the most significant effect is the crankshaft fillet rolling strengthening process. [0003] The crankshaft fillet rolling process is divided into two types: fillet undercut rolling and fillet non-sinking rolling. When using the crankshaft fillet non-sinking rolling process, the crankshaft journal has passed Fine grinding, the cylindricity of the jo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/14B21D3/16
CPCB21D3/02B21D3/16
Inventor 张学强张东王守河赵小立
Owner BINZHOU HEAD CRANKSHAFT
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