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Welding structure of hydraulic cylinder jacket and processing technology thereof

A welding structure and hydraulic cylinder technology, applied in the field of hydraulic cylinders, can solve problems such as damage to seals and affecting the service life of seals

Inactive Publication Date: 2014-12-10
XCMG HYDRAULICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the hydraulic cylinder is in use, the seal reciprocates, and passing through this gap will definitely cause damage to the seal and affect the service life of the seal

Method used

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  • Welding structure of hydraulic cylinder jacket and processing technology thereof
  • Welding structure of hydraulic cylinder jacket and processing technology thereof
  • Welding structure of hydraulic cylinder jacket and processing technology thereof

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Experimental program
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Effect test

Embodiment Construction

[0018] The following is a specific embodiment of the present invention, and the present invention will be further described in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, a hydraulic cylinder sheath welded structure, which includes a cylinder 1 and a sheath 3; cylinder 1 has an inner hole seam at one end, and a positioning cylinder 31 at one end of the sheath 3, and the positioning cylinder 31 is cylindrical. The inner diameter is smaller than the inner diameter of the sheath 3, and the outer side of the positioning cylinder 31 is provided with an outer circular seam; the positioning cylinder 31 of the sheath 3 is inserted into the inner hole seam of the cylinder body 1, and the radial connection formed between the cylinder body 1 and the two ends of the sheath 3 There is a U-shaped weld 2 on the seam, and the distance between the bottom of the weld 2 and the outer surface of the positioning cylinder 31 is 1 mm to ensure complete penetration...

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Abstract

The invention discloses a welding structure of a hydraulic cylinder jacket and a processing technology thereof, and belongs to the technical field of hydraulic cylinders. The welding structure of the hydraulic cylinder jacket comprises a cylinder body, and a jacket fixed at one end of the cylinder body, wherein an inner hole stop port is formed in one end of the cylinder body; a positioning cylinder is arranged at one end of the jacket; an outer circular stop port is formed in the outer side of the positioning cylinder; the positioning cylinder of the jacket is inserted in the inner hole stop port of the cylinder body; a loop of U-shaped welding line is arranged on a radial seam formed by two end surfaces of the cylinder body and the jacket; the complete fusion in welding can be guaranteed by the distance from the bottom end of the welding line to the outer surface of the positioning cylinder; and the cylinder body and the jacket can be fixedly welded in the welding line. As the fitting positioning mode of the hydraulic cylinder jacket and the cylinder body is changed, the wall thickness in a welding bead is reduced, the complete fusion in welding is realized, the purpose of obtaining a finished product having no abutting welding lines and welding defects is achieved, and a sealing piece performing the reciprocating movement is protected from being damaged.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder sheath welding structure and processing technology. Background technique [0002] Excavator hydraulic cylinders are used in harsh environments, with long continuous operating hours, large pressure shocks, and fast running speeds. In order to ensure their safety, a buffer structure is usually installed at the end of the stroke of the hydraulic cylinder to buffer high pressure. This buffer structure is generally To increase the wall thickness at the front end of the cylinder, welding the sheath is the most common way to increase the wall thickness of the buffer zone. There are many connection and positioning methods for the welding of the sheath and the cylinder body, but there are butt joint gaps after welding, which will cause great damage to the reciprocating seal. If the positioning spigots are respectively processed on the cylinder body and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23P15/00B23K31/02
CPCB23K33/00B23P15/00
Inventor 樊耀华杨志怀刘朋唐晓鹏褚桂君
Owner XCMG HYDRAULICS CO LTD
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