Digital display precision flow controllable and adjustable multi-column aluminum heat exchanger flame brazing equipment

A flame brazing and exchanger technology, applied in welding equipment, metal processing equipment, electric heating devices, etc., can solve problems such as unsuitable for brazing of all-aluminum heat exchangers, high leakage rate, loss, etc.

Active Publication Date: 2011-11-30
ZHEJIANG XINRUI WELDING MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, in recent years, Zn-Al-(Ag) solder has been developed at home and abroad. Its melting point is only about 380°C, which is very suitable for automatic and continuous flame brazing of aluminum and aluminum alloy U-sha

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  • Digital display precision flow controllable and adjustable multi-column aluminum heat exchanger flame brazing equipment
  • Digital display precision flow controllable and adjustable multi-column aluminum heat exchanger flame brazing equipment
  • Digital display precision flow controllable and adjustable multi-column aluminum heat exchanger flame brazing equipment

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Embodiment Construction

[0013] 1. For a good flame generation suitable for flame brazing of aluminum heat exchangers, the most important thing is to have a sophisticated and agile air flow control system to control the real-time control of the gas flow of liquefied petroleum gas and air generated by the flame to ensure that the gas The flow is constant. Liquefied petroleum gas (LPG) and compressed air pipelines are installed with dry filters (15 in Figure 1) to make the gas relatively clean, and then decompressed through the precision pressure reducing valve (16, 8 in Figure 1) to make the liquefied petroleum gas Gas (LPG) pressure and air pressure for combustion are relatively stable, which lays the foundation for the mass flow meter (Figure 16, on-off solenoid valve, mass flow meter) to control the air flow in a good, precise and agile manner. The flow rate of liquefied petroleum gas and air is set on the touch screen, and the PLC program continuously and precisely detects the gas flow at the outle...

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Abstract

The invention discloses torch soldering equipment which is used for linearly moving on a rail and is used for soldering the U-shaped tube of an all aluminum heat exchanger. The equipment is composed of an electric control unit, a material feeding area, a welding and heating area, a blanking area and a pneumatic control unit. Under the condition that liquefied petroleum gas (LPG), air, cooling water, a power supply and the like are switched on as required, the existing product specification (technological parameters, such as chosen transmission link speed, flame size and the like) is chosen, and then, ignition is carried out to start a conveyor, and a conveying chain is operated under a constant speed. Workpieces (parts and welding rings which are assembled as required) which need to be welded are continuously put in the material feeding area to a conveying link plate; products are conveyed to two sides of a welding area by the conveying link plate automatically at a constant speed to be heated and welded by symmetrical fire row flames; then the products are conveyed to the blanking area; and the products are continuously unloaded from a conveying link in the blanking area and simultaneously a welding effect is monitored.

Description

technical field [0001] The invention relates to a brazing equipment, which is used for automatic and continuous flame brazing of U-shaped tubes of all-aluminum heat exchangers while moving linearly on rails. Background technique [0002] In many published literatures, the automatic and continuous flame brazing of aluminum and aluminum alloy U-shaped tubes of all-aluminum heat exchangers has always been an unresolved problem. This is because: 1) If the aluminum-silicon solder with high air tightness (such as 4047, 4043 solder) is used, its melting point is high (the solidus temperature is about 577°C, and the liquidus temperature is about 590-600°C ), the brazing temperature generally needs to be controlled at 610-620°C, while the melting point of pure aluminum is 660°C, and the melting point of aluminum alloy is lower than 660°C, so it is difficult to make the solder in the range of only about 40°C (such as 4047, 4043 brazing material) melt and fill the brazing seam, but al...

Claims

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Application Information

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IPC IPC(8): B23K3/00B23K3/04B23K3/08
Inventor 王水庆
Owner ZHEJIANG XINRUI WELDING MATERIAL
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