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Automatic surfacing of the middle groove

2021-10-27

  Which is better for the middle tank surfacing, the middle tank surfacing process and precautions? Domu will introduce you to you below? Duomu operates plasma surfacing machines, wear-resistant plate surfacing machines, valve surfacing machines and other equipment all the year round. If necessary, please come to consult!
  Shanghai Duomuji Industrial Co., Ltd. is a comprehensive high-tech industrial company that emerged in the economic wave. It specializes in the development, production and sales of high-end power supplies and precision welding equipment. The precision ion welding (Plasma), precision arc welding machine (FineTIG), plasma surfacing machine (PTA), etc. developed by the company are specialized in welding precision parts, thin plates, and surfacing welding of valves, rollers, picks, etc. Welding repair of molds and mechanical shafts has been widely used in many fields such as electronic appliances, coal mining machinery, aerospace and so on.


 
  The company has always been adhering to the tenet of "high-tech products, high-quality products, and high-efficiency services", meticulously building "integrity and professionalism", constantly improving the core competitiveness of the company, and committed to becoming a leading team in the industry.
  Process flow and precautions for surfacing of the middle tank?
 
  1. Surfacing process
  (1) Remove oil, rust and paint on the surface to be welded before surfacing.
 
  (2) Use the template to draw lines according to the shape and size of the weld bead specified in the technology.
 
  (3) If it is surfacing welding after the middle groove is assembled, prepare 2 steel pipes (about 30mm in diameter, 2-3mm longer than the width of the inner groove), and support both ends of the middle groove before welding to prevent deformation during welding.
 
  (4) When welding, first weld 2 large diagonal weld passes, and then weld other short weld passes.
 
  (5) Each weld bead should be welded intermittently, and each section of the weld is about 100mm long and the spacing is about 100mm. The intersection of the weld bead should also be disconnected.
 
  (6) All surfacing weld beads are single-layer, and the weld height is maintained at 1.5-2.0mm.
 
  (7) Natural air cooling after welding, and remove the supporting steel pipe after cooling to room temperature.
 
  2. Recommended welding parameters
 
  Welding current 220-280A, welding voltage 22-28V, shielding gas is pure carbon dioxide or pure argon, shielding gas volume is 20L/min, welding wire extension length is 15-20mm, welding speed is 35cm/min, welding gun inclination angle is 80 degrees, current type For direct reflux.
 
  3. Precautions for surfacing welding
 
  (1) Minimize and disperse welding seams, each welding seam should not be too long, and the welding seam spacing should not be too small.
 
  (2) Pay attention to the welding sequence, so that the middle plate is heated evenly.
 
  

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