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Assembly process of steel-plastic conversion pipe fittings

An assembly process and pipe fitting technology, applied in the direction of manufacturing tools, metal processing, tubular objects, etc., can solve the problems of affecting human health, many variable diameter components, time-consuming and labor-intensive, etc., to alleviate urgent needs, eliminate hidden dangers, and improve production efficiency. Effect

Inactive Publication Date: 2018-09-21
河北广汇燃气装备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an assembly process for steel-plastic conversion pipe fittings to solve the problems existing in the prior art that there are many variable-diameter components in the steel pipe part, repeated welding, time-consuming and laborious, and the welding process affects human health and environmental pollution.

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  • Assembly process of steel-plastic conversion pipe fittings

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Embodiment Construction

[0014] As shown in the figure, an assembly process of steel-plastic conversion pipe fittings, direct injection molding of polyethylene into PE pipes with reduced diameters, turning part of the steel pipes, using a horizontal hydraulic press to push the PE pipes with reduced diameters, and using the reaction force to tighten the compression sleeve Squeeze from the steel pipe end to the PE end, and realize the positioning of the length of the connection part of the pipe fittings through the die tray of the hydraulic press, and complete the assembly. The specific process steps are as follows:

[0015] (1) Inject polyethylene raw materials in an injection molding machine to obtain PE pipes with variable diameters. The injection pressure is controlled at 70-90 MPa, the injection temperature is controlled at 200-220 °C, and the mold temperature is controlled at 40-50 °C. between;

[0016] (2) Turning the front end of the steel pipe to form a number of pull-out prevention grooves, wh...

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Abstract

The invention relates to an assembly process of steel-plastic conversion pipe fittings. The assembly process comprises the following steps of injecting polyethylene into a reducing PE pipe directly, turning a steel pipe partially, pushing the reducing PE pipe with a horizontal hydraulic machine, extruding a fastening press sleeve from the steel pipe end to the PE end with reaction force, and positioning the length of a pipe fitting connecting part through a die tray of the hydraulic machine to complete the assembly. The waste of PE raw materials caused by the conversion of large-diameter PE pipes into small-diameter steel pipes is avoided. The cutting time and repeated welding of a positioning stressed iron ring and a reducing ring are saved, a large amount of manpower, material resourcesand time are saved, the production efficiency is greatly improved, and the production cost is reduced by fifteen percent. At the same time, certain hidden danger caused by welding to the performance of pipe fittings and dust pollution to a certain extent during welding are avoided, and the urgent need for technicians is also alleviated.

Description

technical field [0001] The invention relates to the technical field of pipe fitting assembly, in particular to an assembly process of steel-plastic conversion pipe fittings. Background technique [0002] Steel-plastic conversion pipe fittings are products that realize the conversion of PE pipes and steel pipes. Among them, there are some variable diameter pipe fittings that convert large-diameter PE pipes into small-diameter steel pipes. The variable diameter pipe fittings produced by the traditional process are realized in the steel pipe part, and also need to weld the positioning force iron ring at the connection part. There are many components and repeated welding. A great waste of resources affects production efficiency. In the traditional process, reducing pipe fittings require a lot of welding work. Weld bumps are generated during welding, which is easy to damage the performance of the sealing groove and the pull-out prevention groove, and the welding dust generated d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P11/02B29C45/77B29C45/78B29L23/00B29K23/00
Inventor 王智张海滨郝剑麟
Owner 河北广汇燃气装备有限公司
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