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Method for manufacturing pipeline system with connecting part

A technology for piping systems and connecting parts, which is applied in the field of adjusting the length of piping systems, and can solve problems such as adjusting the length of pipes to any value

Inactive Publication Date: 2004-03-03
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the second prior art makes it impossible to adjust the length of the pipe to an arbitrary value when machining an extended diameter portion at the end of the pipe

Method used

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  • Method for manufacturing pipeline system with connecting part
  • Method for manufacturing pipeline system with connecting part
  • Method for manufacturing pipeline system with connecting part

Examples

Experimental program
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Embodiment Construction

[0041] Hereinafter, several preferred embodiments of the piping system with connecting parts of the present invention will be described in detail with reference to the accompanying drawings. Any of the embodiments shown in the drawings of the present invention relate to a method of manufacturing piping systems connected to front and rear parts of an expansion valve (not shown in the drawings) in a refrigeration cycle of an air-conditioning system for automobiles. Such as image 3 Shown in the appearance of a particular example, the piping system manufactured by the method of the embodiment shown in the figure is for a part of the piping system and includes: a plurality of pipes such as two pipes 21 and 22, one of which is a large diameter pipe, the other pipe is a small diameter pipe, said pipe being bent into a predetermined shape; and two connectors 16, 60 made of thick metal plates, said connectors 16, 60 being formed by caulking Integral with both ends of the tube.

[00...

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PUM

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Abstract

An arbitrary position of a pipe is clamped and a connector is engaged with the pipe. Then, an end portion of the pipe is expanded with a tool such as a diameter expanding punch so as to caulk the pipe to the connector from inside. As a pipe fluctuation-absorbing portion, which is a relief space of pipe material, is provided in a portion of an inner face of the connector, when the diameter-expanding portion is formed, an excess pipe material is absorbed there and the length of the pipe is reduced and adjusted to an appropriate value. A portion in which the pipe fluctuation-absorbing portion is formed is not limited to a forward end portion of the pipe but it may be formed on an inner face of the connector corresponding to an intermediate portion.

Description

technical field [0001] The invention relates to a piping system having connecting parts and being used for a part of a refrigeration cycle such as a vehicle air conditioning system. In particular, the invention relates to a method for producing piping systems by plastic working. The invention also relates to a method for automatically adjusting the length of a pipe system in a method of manufacturing a pipe system. Background technique [0002] Regarding refrigerant pipes for interconnecting various components in the refrigeration cycle of an air-conditioning system for a vehicle, and regarding, for example, refrigerant compressors, condensers and receivers provided in an engine room and placed in The refrigerant pipes that connect the evaporator in the passenger compartment together, one of which is the outlet pipe and the other is the inlet pipe. Two pipes are arranged parallel to each other in front of and behind an expansion valve designed so that the ends of the two p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L13/14B21D19/08B21D39/06B21D41/02B21D53/08B21K1/16F28F9/26
CPCB21D39/06B21D17/025B21D53/08F28F9/26B21D41/02Y10T29/4994Y10T29/49428Y10T29/49915Y10T29/49826Y10T29/49435B21K1/16
Inventor 酒井刚志伊藤诚加藤慎司
Owner DENSO CORP
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