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crank processing technology

A processing technology and crank technology, applied in the field of crank processing technology, can solve the problems of low processing efficiency, weak crank bearing capacity, complicated crank processing technology, etc., and achieve the effects of improving productivity, enhancing bearing capacity and strength, and rationally arranging

Inactive Publication Date: 2015-09-30
QINGDAO CONNECTINROD MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency crank processing technology for the shortcomings of the existing crank processing technology, such as complex processing technology, low processing efficiency and weak crank bearing capacity.

Method used

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Effect test

Embodiment 1

[0017] see figure 1 with figure 2 , a crank processing technology, comprising the following steps,

[0018] (1) Blank processing stage: prepare the crank blank, which is 20Cr steel, with a hardness HRC value of 20°, place the forged crank blank on a flat end face milling machine, and process the blank to the specified size; The surface of the workpiece is used as the positioning reference, and the center hole is drilled at the geometric center of the two ends of the crank with a bench drill;

[0019] (2) Rough machining stage: take the center holes on the two ends of the crank as the positioning reference, and use a CNC lathe to perform rough and fine turning and drilling and eccentric machining on the crank shaft and big end respectively; install a semicircular key on the milling and drilling machine The milling cutter processes the keyway on the shaft, and the thread rolling machine is used to process the shaft, and the processed workpiece is heat treated. The hardness of...

Embodiment 2

[0022] see figure 1 with figure 2 , a crank processing technology, comprising the following steps,

[0023] (1) Blank processing stage: prepare the crank blank, which is 20Cr steel, with a hardness HRC value of 23°, place the forged crank blank on a flat end face milling machine, and process the blank to the specified size; The surface of the workpiece is used as the positioning reference, and the center hole is drilled at the geometric center of the two ends of the crank with a bench drill;

[0024] (2) Rough machining stage: take the center holes on the two ends of the crank as the positioning reference, and use a CNC lathe to perform rough and fine turning and drilling and eccentric machining on the crank shaft and big end respectively; install a semicircular key on the milling and drilling machine The milling cutter processes the keyway on the shaft, and the thread rolling machine is used to process the shaft, and the processed workpiece is subjected to heat treatment. ...

Embodiment 3

[0027] see figure 1 with figure 2 , a crank processing technology, comprising the following steps,

[0028] (1) Blank processing stage: prepare the crank blank, which is 20Cr steel, with a hardness HRC value of 25°, place the forged crank blank on a flat end face milling machine, and process the blank to the specified size; The surface of the workpiece is used as the positioning reference, and the center hole is drilled at the geometric center of the two ends of the crank with a bench drill;

[0029] (2) Rough machining stage: take the center holes on the two ends of the crank as the positioning reference, and use a CNC lathe to perform rough and fine turning and drilling and eccentric machining on the crank shaft and big end respectively; install a semicircular key on the milling and drilling machine The milling cutter processes the keyway on the shaft, and the thread rolling machine is used to process the shaft, and the processed workpiece is heat-treated. The hardness HR...

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Abstract

The invention relates to the technical field of machining of machine parts, and particularly discloses a crank machining technology. The crank machining technology comprises the following steps: at a blank processing period, machining blanks to specified dimensions; at a coarse machining period, respectively performing coarse finish turning machining and drill carriage deviated hole machining on a crank shaft and a big head end, and performing keyway machining and thread machining on the shaft; at a fine machining period, performing fine grinding processing and machining after performing shot blasting processing on the surface of the crank. The crank machining technology has the advantages that the machining working procedures are reasonably arranged, the production and machining steps are greatly simplified, the production rate of cranks is effectively improved, the requirements on rigidity and tenacity during crank working are met at the same time, and the bearing capacity and strength of the crank are effectively improved.

Description

technical field [0001] The invention relates to the technical field of mechanical parts processing, in particular to a crank processing technology. Background technique [0002] The crank is one of the important parts in the engine equipment. When working, it cooperates with the connecting rod to convert the gas pressure acting on the piston into rotational power and transmit it to the transmission mechanism. When the crank is working, it is subjected to huge bending moments and torques with periodic changes in direction, and because the crank works for a long time, high requirements are placed on the rigidity, toughness and wear resistance of the crank material. [0003] The existing crank processing technology has low production efficiency and automation, and is generally divided into two steps: rough processing and fine processing. Rough processing uses a lathe to turn the shaft end of the crank, and the process stability is poor; fine processing is divided into rough gri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/14F16C3/22
Inventor 黄荣谭哲宝
Owner QINGDAO CONNECTINROD MACHINERY
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