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Non-preheating plasma arc welding method for brass sheet

A plasma arc and welding method technology, applied in the field of plasma arc welding, can solve the problems of high welding cost, high output energy, pores, deformation, etc., and achieve the effect of low cost and simple process

Pending Publication Date: 2019-03-22
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, MIG, TIG and other welding methods for brass are prone to defects such as pores and deformation, and the welding speed is limited; in laser welding, due to the high reflectivity of the surface of the plate, most of the energy will be reflected during the welding process , which requires high output energy, resulting in high welding costs

Method used

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  • Non-preheating plasma arc welding method for brass sheet
  • Non-preheating plasma arc welding method for brass sheet
  • Non-preheating plasma arc welding method for brass sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Embodiment: refer to attached Figure 1-6 Shown, a kind of non-preheating plasma arc welding method of thin plate brass, comprises the following steps:

[0050] (1) Pre-welding treatment of the plate: first use alcohol to remove the oil stain on the surface of the plate 8, then polish the surface of the plate 8 with 400# sandpaper to remove the oxide film, then clean the surface with acetone to remove the oil stain and impurities on the surface of the weldment, and finally bake Keep it dry for later use, do not overheat during the grinding process, and the temperature does not exceed 100°C. The thickness of the thin plate 8 used is 2mm; the chemical composition of the material is shown in the table below

[0051]

[0052](2) Assembling the plate: fix the 8 workpieces of the plate on the fixture 7, use I-shaped grooves to control the assembly accuracy, and do not use a backing plate on the back; the fixture 7 includes a bottom plate 13, a left pressing piece, and a ri...

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Abstract

The invention discloses a non-preheating plasma arc welding method for a brass sheet. The method adopts direct current straight polarity, wherein the welding current is 77 A, the ion gas flow is 2.2 L / min, the welding speed is 200 mm / min, and the wire feeding speed is 1.7m / min; welding is carried out by adopting a welding wire without preheating, the brass sheet is not preheated, a backing plate is not used on the back, the double-sided forming is realized through single-sided welding, the process is simple and convenient, and the cost is low; and the formed welding seam is attractive, the micro-structure is clear, the performance of a welding joint is good, the mechanical property is better than that of a base material, the tensile strength of the welding joint rises to reach 105.7% of the base material, and a tensile sample is broken on the base material.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a non-preheating plasma arc welding method for thin-plate brass. Background technique [0002] Brass is a copper-zinc alloy with a T+U dual-phase structure. Zinc can improve the hardness and strength of the material and is a widely used engineering material. After processes such as rolling or casting, further welding processing is required for some thin edges, in addition to welding production of thin sheet brass, these require efficient welding methods with good weld shape and good performance. [0003] At present, MIG, TIG and other welding methods for brass are prone to defects such as pores and deformation, and the welding speed is limited; in laser welding, due to the high reflectivity of the surface of the plate, most of the energy will be reflected during the welding process , which requires a high output energy, resulting in high welding costs. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/02B23K103/12
CPCB23K10/022
Inventor 胡庆贤杨溢王晓丽胥国祥浦娟李志超唐峰
Owner JIANGSU UNIV OF SCI & TECH
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