Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Active Publication Date: 2013-09-11
浙江翰德圣智能再制造技术有限公司
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the existing repair technology, the purpose of the present invention is to provide a precision pulse surfacing repair process on-site for large-scale PTA dryer sealing surface wear, which solves the problem of low bonding strength, low hardness and wear resistance of the existing brush-plated surfacing layer. Poor performance, complex and difficult to operate laser cladding welding equipment, low repair efficiency, high residual stress level, easy to produce cracks, etc.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process
  • Large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process
  • Large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the sealing surface of a large-scale PTA dryer with a weight of 300 tons is repaired. The repair process of precision pulse microscopic surfacing welding without deformation on the sealing surface of the dryer includes the following steps:

[0039] (1) Clean up the worn part before surfacing welding

[0040] First use a rag to wipe off most of the sealing grease, and use absorbent paper to wipe the remaining unremoved parts, then clean the worn part with kerosene and acetone; finally use precision electric grinding tools to remove the fatigue layer at the worn part;

[0041] (2) Precision pulse microsurfacing welding

[0042] Choose a nickel-based or cobalt-based alloy with higher wear resistance and corrosion resistance than the substrate and excellent weldability as the surfacing material for the worn part. The diameter of the nickel-based welding wire is 1-1.6mm, and its nominal composition is: Ni-22Cr-10Mo -5Nb-4Fe-0.1C; the diameter of cobalt-b...

Embodiment 2

[0051] In this embodiment, the sealing surface of a large-scale PTA dryer with a weight of 400 tons is repaired. The repair process of precision pulse microscopic surfacing welding without deformation at the scene of the wear of the sealing surface of the dryer includes the following steps:

[0052] (1) Clean up the worn part before surfacing welding

[0053] First use a rag to wipe off most of the sealing grease, and use absorbent paper to wipe the remaining unremoved parts, then clean the worn part with kerosene and acetone; finally use precision electric grinding tools to remove the fatigue layer at the worn part;

[0054] (2) Precision pulse microsurfacing welding

[0055] Choose a nickel-based or cobalt-based alloy with higher wear resistance and corrosion resistance than the substrate and excellent weldability as the surfacing material for the worn part. The diameter of the nickel-based welding wire is 1-1.6mm, and its nominal composition is: Ni-22Cr-10Mo -5Nb-4Fe-0.1C;...

Embodiment 3

[0064] In this embodiment, the sealing surface of a large-scale PTA dryer with a weight of 200 tons is repaired. The repair process of precision pulse microscopic surfacing welding without deformation at the scene of the wear of the sealing surface of the dryer includes the following steps:

[0065] (1) Clean up the worn part before surfacing welding

[0066] First use a rag to wipe off most of the sealing grease, and use absorbent paper to wipe the remaining unremoved parts, then clean the worn part with kerosene and acetone; finally use precision electric grinding tools to remove the fatigue layer at the worn part;

[0067] (2) Precision pulse microsurfacing welding

[0068] Choose a nickel-based or cobalt-based alloy with higher wear resistance and corrosion resistance than the substrate and excellent weldability as the surfacing material for the worn part. The diameter of the nickel-based welding wire is 1-1.6mm, and its nominal composition is: Ni-22Cr-10Mo -5Nb-4Fe-0.1C;...

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
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

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.

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/00
Inventor 陈书王明生韩旭李存玉
Owner 浙江翰德圣智能再制造技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com