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Hollow crankshaft and method for manufacturing same

A crankshaft, hollow technology, applied in the field of engines and vehicles equipped with the crankshaft, the hollow crankshaft can solve the problems of insufficient strength and quality, etc.

Inactive Publication Date: 2014-11-26
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, it can be found that such an assembly is not of sufficient quality in terms of strength

Method used

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  • Hollow crankshaft and method for manufacturing same
  • Hollow crankshaft and method for manufacturing same
  • Hollow crankshaft and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The invention relates to a crankshaft 1 composed of two workpieces or half-shells 2, 2'obtained by stamping. In this way, the cut steel is heated by induction to realize the stamping of the first half shell 2. Next, the half shell 2 is deburred and the diameter is measured. Then, a controlled cooling step is performed before the shot peening (grenailler) of the half shell 2. Next, before sending it for dimensional inspection and magnetic particle inspection, the half-shell 2 is subjected to an appearance inspection step.

[0034] The same processing steps are applied to the second half shell 2'.

[0035] For Figure 4 with 5 The shown 2 or 3 cylinder crankshaft can press two half shells 2, 2'with a flat joint surface (plan de joint) by means of end-to-end positioning under the same forging (coup de presse) . However, for engine crankshafts with, for example, 3 or 6 cylinders, there is always the problem of angular offset between the journal and the counterweight. Then, ...

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PUM

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Abstract

The invention relates to a hollow crankshaft (1) consisting of two forged parts or half-shells (2, 2') assembled together by welding along the longitudinal axis of the crankshaft (1). The invention involves shaping the contiguous edges (3, 3') of the parts (2, 2') such that, when said parts (2, 2') are assembled together edge to edge, a groove (4) is defined in which a welding seam is housed, the edge (3) of one (2) of the parts (2, 2') further having a rim (6) which projects away from the inner surface of said part (2) and which is to be housed along the inner surface of the other part (2') during the assembly of said parts (2, 2').

Description

[0001] The present invention claims the priority of the French application 0955078 filed on July 21, 2009, the content (text, drawings and claims) of which are incorporated herein by reference. Technical field [0002] The present invention relates to a hollow crankshaft, an engine and a vehicle equipped with the crankshaft, and also relates to a method of manufacturing such a crankshaft. Background technique [0003] The crankshaft used in the existing vehicle engine is usually made of a single piece such as forging or casting. In this way, the materials used, such as cast iron and steel, appear in all sections of the workpiece. Therefore, holes for lubricating the bearings and journals of the crankshaft must be realized during the machining process. [0004] Due to the overall shape of the crankshaft, its usually relatively large weight is difficult to reduce without changing the shape and size of the crankshaft. [0005] In order to reduce the weight of such a crankshaft, FR280259...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/08F16C3/10F16C3/14
CPCF16C3/10F16C3/14B21K1/08B23K33/008B23K33/006F16C2226/36
Inventor J·Y·莫兰M·梅尼M·勃朗B·费龙
Owner PEZHO SITROEN AUTOMOBILS SA