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Processing technique of local deformation of cylinder jacket

A technology of local deformation and processing technology, applied in the field of local deformation processing technology of cylinder liner, can solve the problem that the inner hole of the cylinder liner cannot achieve local deformation, etc., and achieve the effect of good anti-wear performance, high production efficiency and lower production cost.

Active Publication Date: 2011-05-04
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a local deformation processing process of the cylinder liner, which overcomes the defect that the local deformation cannot be realized during the honing process of the inner hole of the cylinder liner in the prior art and thus the carbon ring needs to be processed

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  • Processing technique of local deformation of cylinder jacket
  • Processing technique of local deformation of cylinder jacket

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Experimental program
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Effect test

Embodiment 1

[0018] Now, the cylinder liner with an inner hole diameter of φ120mm is locally deformed, and the high-frequency induction hardening process is used to determine the deformation amount to 0.06±0.005mm, the width of the hardened layer is 7mm, and the upper part of the top dead center of the first piston ring is partially quenched The position of the post-hardening layer; the diameter of the selected quenching sensor is φ115mm and the width is 4mm. The power of the control power supply is 82KW, the frequency is 100KHz, and the moving speed is 3mm / s for high temperature induction hardening. After quenching, use a profiler to measure the position of local quenching, and use an inner diameter gauge to measure the deformation, which meets the requirements. It has been popularized and used for six months. After removing carbon deposits, it can effectively improve the wear of cylinder liners and piston rings, reduce gas leakage, reduce lubricating oil consumption, and reduce smoke emi...

Embodiment 2

[0020] Now, the cylinder liner with an inner hole diameter of φ135mm is locally deformed, and the high-frequency induction hardening process is adopted to determine the deformation amount as 0.08±0.005mm, the width of the hardened layer is 8.5mm, and the position above the top dead center of the first piston ring is local The position of the hardened layer after quenching; the diameter of the selected quenching sensor is φ130mm and the width is 5mm. The control power is 86KW, the frequency is 100KHz, and the moving speed is 3mm / s for high temperature induction hardening. After quenching, use a profiler to measure the position of local quenching, and use an inner diameter gauge to measure the deformation, which meets the requirements. It has been used for 7 months so far. After removing carbon deposits, it can effectively improve the wear of cylinder liners and piston rings, reduce gas leakage, reduce lubricating oil consumption, and reduce smoke emissions to meet Euro 5 emissi...

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Abstract

The invention relates to a processing technique of local deformation of a cylinder jacket, comprising the following processing steps: adopting high-frequency induction quenching technology; determining the size of the deformation valve after quenching and ensuring the radial clearance of the bore diameter and the plug head par to be 0.25-0.36mm; determining the position of the local hardening layer according to the top dead center (TDC) of a first piston ring; controlling the width of the hardening layer in the range of 2mm on the upper part of the top dead center of the piston ring and 3mm below the end surface of the cylinder jacket; choosing a matched quenching sensor; controlling the radial clearance between the quenching senor and the bore diameter of the cylinder jacket to be 2.5-5.0mm and the width of the quenching sensor to be 2-3.5mm smaller than that of the hardening layer; using the quenching sensor to carry out high-frequency sensor quenching at corresponding positions to obtain hardening layers and realize local deformation processing for the cylinder jacket. The processing technique in the invention breaks down the traditional method that needs processing and retrofitting a decarbonization ring, has high production efficiency and can effectively lower production cost, and the bulge part after quenching has improved hardness and better wear resistance.

Description

(1) Technical field [0001] The invention belongs to a cylinder liner processing technology, in particular to a cylinder liner local deformation processing technology. (2) Background technology [0002] During the working process of the engine, carbon deposits are often formed at the top of the piston, piston ring groove, and the upper end of the cylinder liner inner hole due to combustion. These carbon deposits become local overheating points, causing the piston to generate local high temperature and burn. At the same time, carbon deposits will form abrasive particles, which will accelerate the wear of parts and shorten the service life of parts. In order to remove carbon deposits, the size of the upper end of the inner hole of the cylinder liner is usually reduced, and the carbon deposits attached to the inner wall of the piston and cylinder liner are scraped off by extrusion and become granular, and the particles are discharged outside the engine along with the exhaust str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/10C21D11/00C21D9/00
CPCY02P10/25
Inventor 郭荣磊秦小才邹悟会王勇
Owner ZYNP GRP