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Major diameter metal corrugated pipe welding process

A metal bellows, welding process technology, applied in the direction of liquid cleaning methods, chemical instruments and methods, cleaning methods and utensils, etc., can solve the problems of affecting performance, high sealing friction power, and easily damaged equipment, etc., to achieve end face sealing Stable and reliable, reliable sealing performance, and the effect of reducing the cost of use

Inactive Publication Date: 2007-12-05
张家港市金鹰密封件厂
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Problems solved by technology

However, in order to ensure the flexibility and elasticity of metal bellows, the thickness of its material is usually only 0.08 mm, which is equivalent to the diameter of a hair. Due to the constraints of the existing metal welding process, it can only be processed with a diameter of Metal bellows up to 300mm
Therefore, packing seals are still used in large-diameter mechanical transmissions, especially mechanical transmissions with a diameter greater than 1000 mm. Due to the inherent sealing friction power, large energy consumption, and easy damage to equipment, etc. Congenital defects cannot fundamentally solve the phenomenon of serious environmental pollution and waste of resources such as running, leaking, dripping, and leaking; for some large-scale mechanical transmission rotating devices that require high mechanical seals, the use of packing seals will directly affect Performance of the entire mechanical transmission

Method used

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Embodiment Construction

[0007] The welding process of the large-diameter metal bellows of the present invention, the steps include: according to the diameter of the metal bellows to be welded, the metal thin plate is made into a blank with a length of no more than 20 cm, and then ultrasonic cleaning and drying are performed sequentially. , coloring flaw detection and molding, again through coloring flaw detection, ultrasonic cleaning and drying, and then according to the size of the inner and outer diameters of the metal bellows to be welded, the inner circle and the outer circle are welded sequentially by stitch welding, and the welding is completed. After the inner and outer circles of the tube are vacuum heat treated, the front and rear seats are welded, and finally the required metal bellows are obtained through vacuum heat treatment. Before the large-diameter metal bellows obtained through the above steps are packaged and put into storage, an airtightness test and a finished product inspection mu...

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Abstract

The present invention discloses metal sheet welding process for producing great diameter metal bellows for large mechanically driving turning gear. The welding process includes the following steps: cutting metal sheet into blank of certain length determined by the welded metal bellows, washing and stoving, dye checking, shaping, dye checking for the second time, washing and stoving, welding the inner cylinder and the outer cylinder, vacuum heat treatment, welding the front seat and the back seat, and final vacuum heat treatment to form the metal bellows.

Description

technical field [0001] The invention relates to a welding process for metal bellows, in particular to a welding process for large-diameter metal bellows. Background technique [0002] As we all know, mechanical seals are inseparable from mechanical transmission devices, and mechanical seals have various forms such as packing seals and bellows seals. Among many mechanical seals, metal bellows seals do not require frequent maintenance, have good floating performance, uniform force, and can adapt to various rotation directions (angle deflection ≥ 10 degrees) and other superior performances, and are used in many high-precision equipment has been widely used. However, in order to ensure the flexibility and elasticity of metal bellows, the thickness of its material is usually only 0.08 mm, which is equivalent to the diameter of a hair. Due to the constraints of the existing metal welding process, it can only be processed with a diameter of Metal bellows up to 300mm. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/08B08B3/12
Inventor 童汉全
Owner 张家港市金鹰密封件厂
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