Machining method of heat exchanger tube plate build-up welding

Abstract

As the number of tube plate build-up welding composite layers of a composite plate heat exchanger increases, a traditional direct build-up welding mode wastes labor and time. The invention provides a machining method of heat exchanger tube plate build-up welding. In the machining method, the method that machining is performed firstly and then build-up welding is conducted is used for machining, therefore, operation is more convenient, and the efficiency is greatly increased; firstly machining is conducted according to the method, the external diameter of a tube plate sealing surface is reduced by 6-10 mm, the depth of the tube plate sealing surface is 5 mm, and 45-degree chamfering is conducted on the tube plate sealing surface, the width of a partition plate groove is increased by 4-6 mm, the depth of the partition plate groove is 5 mm, the two sides of the partition plate groove are chamfered by 30-60 degrees, and a 3-5 mm stainless steel composite layer is formed in a build-up welding mode. According to the method, the purposes of energy conservation, consumption reduction, cost decreasing and efficiency increasing are achieved.

Description

technical field [0001] The invention relates to production and processing equipment for heat exchangers, in particular to a processing method for a tube plate of a composite plate heat exchanger that requires surfacing welding of stainless steel layers. Background technique [0002] In the traditional process, the processing of the tube sheet mostly adopts the method of surfacing stainless steel composite layer directly on the blank. In the traditional method, the tube sheet needs to be surfacing with a composite layer of 8~10mm, so the workload of the surfacing process is relatively large, and the Many welding materials are required and the cost is high. [0003] At present, there are more and more surfacing welding composite layers of the tube plate of the composite plate heat exchanger. If the surfacing process is directly performed on the blank, it will undoubtedly lead to an increase in the complexity and cost of production. Contents of the invention [0004] In orde...

AI Technical Summary

Problems solved by technology

[0002] In the traditional process, the processing of the tube sheet mostly adopts the method of surfacing stainless steel composite layer directly on the blank. In the traditional method, the tube sheet needs to be surfacing with a composite layer of 8~10mm, so the workload of the surfacing process is relatively large, and the Many welding consumables are required and the cost is high

[0003] At present, there are more and more composite layers of tube plate surfacing welding in composite plate heat exchangers. If the surfacing process is directly performed on the blank, it will undoubtedly lead to an increase in the complexity and cost of production.

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