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The actual operation process of display cooler welding
author: supermarket refrigerated showcase category: walk-in display coolers Views: 567Time: 2016-08-22
The actual operation process of display cooler welding is as follows:
① Welding of copper pipes is absolutely not allowed to use butt joints, and must be aligned with one of the two copper pipes to be welded before welding Expanding operation, expand the-end of the copper tube into a cup shape. The specific operation process of the display cooler flaring operation is detailed in the relevant chapters, and will not be described here.
②After a copper pipe is expanded, the two copper pipes that will be welded are aligned and inserted, and the two copper pipes can be welded after they are connected.
③Open the main valve of the oxygen cylinder and the main valve of the gas cylinder in turn, then turn on the gas control knob on the welding torch, use a lighter to ignite the open flame, and then adjust the oxygen gas control knob and the gas control knob on the welding torch to finally make the flame A neutral flame that meets the requirements of welding operations. Aim the flame at the welding port and heat evenly. When the copper tube is heated to a certain level, welding can be carried out.
④Put the welding rod on the welding port and use the high temperature of the neutral flame to melt it. The welding rod is required to evenly surround the two copper pipes to be welded and the vicinity of the welding rod is above 0.8cm after melting. Then, evenly heat the welding part of the copper pipe for a little time to complete the welding operation. For the effect of welding, the welded joint of the welded copper pipe is required to be smooth and free of small holes or slag. Note: When performing welding operations, first ensure that the welding joint is heated uniformly. Never direct the flame of the welding torch to a certain part of the copper tube for long-term heating, otherwise the copper tube will burn out. We must pay attention to the welding methods and skills during the welding operation. In addition, if the copper pipe is corroded before the welding operation, it is necessary to use emery cloth butt welding to polish the area of 1~2cm near the welding part until the welding part shows the copper color and the main color, which helps to make the two copper pipes Welded together nicely. The welding of the capillary tube and other copper tubes belongs to the welding of special copper tubes. Since the capillary tube used in the display cooler is a copper tube with a small diameter (only 4mm), the heating temperature cannot be too high. When welding the capillary tube with other pipes, the neutral flame with a length between 20 and 30 cm cannot be used. The length of the neutral flame should be adjusted between 10 and 15 cm, and the capillary tube cannot be directly heated. The middle part of the nozzle of the blister copper pipe connected to it is heated.
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