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Machining oval cores in crankshafts

A technology for crankshafts and journals, applied in the field of processing elliptical cores, which can solve problems such as difficult to form hollow parts

Active Publication Date: 2019-04-16
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the benefits that can only be obtained through forging, when forging a crankshaft, it is difficult to form such a hollow portion since the forged crankshaft needs to be processed

Method used

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  • Machining oval cores in crankshafts
  • Machining oval cores in crankshafts
  • Machining oval cores in crankshafts

Examples

Experimental program
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Embodiment Construction

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0021] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope of the disclosure to those who are skilled in the art. Numerous specific details are set forth (eg, examples of specific components, devices, and methods) to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed; that example embodiments may be embodied in many different forms; and that neither specific details nor example embodiments should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, known device structures, and well-known technologies are not described in detail.

[0022] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended t...

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PUM

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Abstract

A forged crankshaft assembly for an engine, and a method of manufacturing the same, has a forged crankshaft and a removable counterweight to provide access for core drilling or milling a cavity. The forged crankshaft has a pin bearing journal, a main bearing journal, a first crank arm supporting the pin bearing journal, a second crank arm supporting the pin bearing journal and connecting the pin bearing journal and the main bearing journal, and at least one milled crank arm cavity formed within at least a portion of the second crank arm. The removable counterweight extends radially outward from the first crank arm, wherein the crank arm cavity is configured to be accessible to a core drill or mill cutter only when the removable counterweight is removed from the first crank arm and inaccessible to the core drill or mill cutter when the removable counterweight is coupled to the first crank arm.

Description

technical field [0001] The present disclosure relates to the machining of crankshafts, and more particularly to the machining of elliptical cores within forged crankshafts. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] The engine crankshaft converts the reciprocating linear motion of the pistons into rotational motion about the crank axis to provide torque to propel a vehicle such as, but not limited to: a train, boat, airplane or automobile. The crankshaft is an important part of the engine and is the starting point of engine design. Crankshaft design has an impact on the overall packaging of the engine and thus on the overall mass of the engine. Therefore, minimizing the size and / or mass of the crankshaft reduces the size and mass of the engine, which has a combined effect on the vehicle's overall size, mass, and fuel economy. [0004] The crankshaft includes at l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/08B23P15/00
CPCB23P15/00F16C3/08B23P2700/07F16C2220/62F16C2226/76F16C2220/46F16C3/12B23B35/00B23B2215/20B23C3/06B23C2215/20F16F15/283F16F15/26
Inventor D·E·穆里什S·A·哈克D·赫斯科
Owner GM GLOBAL TECH OPERATIONS LLC