Large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process

A pulse surfacing and precision technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of complex and difficult operation of laser cladding welding equipment, low bonding strength of brush plating surfacing layer, high residual stress level, etc. , to achieve the effect of saving disassembly cost and time, overlaying welding efficiency, and small heat-affected zone
CN103286459AActive Publication Date: 2013-09-11浙江翰德圣智能再制造技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
浙江翰德圣智能再制造技术有限公司
Publication Date
2013-09-11

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Abstract

The invention belongs to the large-scale chemical equipment sealing surface on-site in-situ repair technology, and particularly relates to a large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process which comprises the steps that (1) an abrasion portion is cleared before surfacing welding; (2) precise pulse microscope surfacing welding is carried out: nickel / cobalt-base alloys with higher abrasion resistance to a base body and excellent weldability are chosen to serve as surfacing welding materials on the abrasion portion, and a precise pulse microscope surfacing welding machine is adopted to carry out surfacing welding on the abrasion portion; (3) a surfacing welding layer is preprocessed: a power-driven or pneumatic polishing tool is adopted to carry out preprocessing on the surfacing welding layer; (4) finish machining is carried out: oilstone and multi-granularity abrasive paper is adopted to carry out final finish machining on a repair surface to meet requirements for sealing surface dimension and precision. According to the large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process, the on-site in-situ surfacing welding repairing is carried out on the sealing surface of a large-scale device, and the base body is kept to be in a low temperature basically in a surfacing welding process and does not deform; the surfacing welding layer and the base body are in metallurgical bonding, strength is high, the surfacing welding materials are higher in abrasion resistance than the base body, surfacing welding efficiency is high, and cost is low.
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Description

technical field

[0001] The invention belongs to the on-site in-situ repairing technology of the sealing surface of large-scale chemical equipment, in particular to a precision pulse surfacing repairing process on-site for the abrasion of the sealing surface of a large-scale PTA dryer. Background technique

[0002] Purified terephthalic acid (PTA) is the raw material for the production of polyester film, fiber and packaging resin, and polyester fiber and packaging resin are important raw materials for the clothing, food and beverage packaging industries. With the rapid development of my country's clothing and other related industries, domestic PTA production has been unable to keep up with market demand. The million-ton PTA dryer is an important device for large-scale production of PTA. In the past, this equipment had to rely on foreign imports. The price of each set of equipment was as high as hundreds of millions of yuan. The million-ton PTA dryer is my country's "Eleventh ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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