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Stainless steel fuel high-pressure oil pipe and manufacturing process thereof

A high-pressure oil pipe and manufacturing process technology, which is applied to fuel injection devices, engine components, machines/engines, etc., can solve problems such as the decline in nut locking performance and the reliability of oil pipe sealing, so as to reduce the rigidity of the body and ensure the axial force , to ensure the effect of sealing reliability

Pending Publication Date: 2020-12-18
SHANGHAI WINKELMANN LONGCHUAN (SWL) MOTORCOMPONENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, how to prevent the nut from being annealed at high temperature during this process, avoiding a sharp drop in the locking performance of the nut, and greatly reducing the reliability of the oil pipe seal also needs to be solved

Method used

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  • Stainless steel fuel high-pressure oil pipe and manufacturing process thereof
  • Stainless steel fuel high-pressure oil pipe and manufacturing process thereof
  • Stainless steel fuel high-pressure oil pipe and manufacturing process thereof

Examples

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Effect test

specific Embodiment 5

[0124] Specific embodiment 5, a kind of stainless steel fuel high-pressure fuel pipe provided in this embodiment 5 is the same as a stainless steel fuel high-pressure fuel pipe in specific embodiment 1, only the manufacturing process steps of a stainless steel fuel high-pressure fuel pipe in this embodiment 5 are simpler, It includes the following steps:

[0125] Step S1: After the raw stainless steel straight pipe is cut off, the port at one end of the stainless steel straight pipe is subjected to the first cold forming process;

[0126] Step S2: performing high-temperature annealing on the port at one end of the stainless steel straight pipe processed by the first cold forming to form a soft sealing joint 2;

[0127] Step S3: Insert two back-to-back nuts 5 through the unprocessed other end port of the stainless steel straight pipe;

[0128] Step S4: Cold forming the unprocessed other end port of the stainless steel straight pipe to form a hard-sealed joint 3;

[0129] Step...

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Abstract

The invention provides a stainless steel high-pressure fuel oil pipe. The stainless steel high-pressure fuel oil pipe comprises a body and two joints, and is characterized in that the two ends of thebody serve as a first end part and a second end part respectively, the two joints serve as a first joint and a second joint respectively, and the first end part of the body and the first joint are integrally formed; and the second end part of the body and the second joint are integrally formed. The invention solves the problems in the prior art that how to realize seamless and leakage-free connection between the stainless steel fuel high-pressure oil pipe and joints with different hardness at two corresponding ends;.

Description

technical field [0001] The invention relates to the technical field of a high-pressure fuel oil pipe connecting a high-pressure oil pump and a high-pressure oil rail in an in-cylinder direct injection engine, in particular to a stainless steel high-pressure fuel oil pipe and a manufacturing process thereof. Background technique [0002] First of all, the stainless steel fuel high-pressure oil pipe needs to be connected to the corresponding joint without gaps during use to avoid oil leakage. Therefore, how to make the seamless connection between the stainless steel fuel high-pressure oil pipe and the corresponding joint has become a problem that needs to be solved. [0003] In addition, there are two existing manufacturing processes for fuel high-pressure oil pipes. One is to perform overall high-temperature brazing on the high-pressure oil pipes composed of oil pipes, machined sealing joints, copper rings and nuts, so that the hardness of the sealing joints at both ends of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F02M55/00F02M55/02
CPCB23P15/00F02M55/005F02M55/02
Inventor 肖松黄陆鑫刘春征叶欣
Owner SHANGHAI WINKELMANN LONGCHUAN (SWL) MOTORCOMPONENTS CO LTD
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