Stainless steel fuel oil 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 the problems of reducing the sealing reliability of oil pipes and the decline in nut locking performance, so as to reduce the rigidity of the body, improve the strength, and ensure Effect of Seal Reliability

Pending Publication Date: 2020-11-17
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 oil high-pressure oil pipe and manufacturing process thereof
  • Stainless steel fuel oil high-pressure oil pipe and manufacturing process thereof
  • Stainless steel fuel oil high-pressure oil pipe and manufacturing process thereof

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specific Embodiment 2

[0149] Specific embodiment 2, the stainless steel high-pressure fuel oil pipe provided in this embodiment 2 is the same as the stainless steel high-pressure fuel oil pipe in specific embodiment 1, only the manufacturing process steps of a stainless steel high-pressure fuel oil pipe in this embodiment 2 are simpler, It includes the following steps:

[0150] Step S1: cutting off the raw stainless steel straight pipe;

[0151] Step S2: Assembling the first connector 8 and the copper ring 7 at the end of the cut stainless steel straight pipe; the first connector 8 is preferably the stainless steel machined connector 6 .

[0152] Step S3: performing high-temperature brazing and high-temperature annealing on one end of the stainless steel straight pipe port assembled with the stainless steel machined joint 6 and the copper ring 7 to form a brazed sealing joint 2;

[0153] Step S4: Insert two back-to-back nuts 5 through the unprocessed other end port of the stainless steel straight ...

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Abstract

The invention provides a stainless steel fuel oil high-pressure oil pipe. The stainless steel fuel oil high-pressure oil pipe comprises a body and two connectors. The stainless steel fuel oil high-pressure oil pipe is characterized in that the two ends of the body are the first end and the second end correspondingly, the two connectors are the first connector and the second connector correspondingly, the first end of the body is connected with the first connector in a sealed manner, and the second end of the body and the second connector are integrally formed. The problems in the prior art about how to achieve seamless and leakage-free connection between the stainless steel fuel oil high-pressure oil pipe and the connectors with different degrees of hardness at the two corresponding ends are solved.

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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IPC IPC(8): F02M55/02F02M55/00B23P15/00
CPCF02M55/02F02M55/005B23P15/00
Inventor 肖松黄陆鑫叶欣
Owner SHANGHAI WINKELMANN LONGCHUAN (SWL) MOTORCOMPONENTS CO LTD
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