Method for continuously soldering aluminum alloy heat exchanger of gas water heater
A gas-fired water heater and heat exchanger technology, which is applied to heat exchange equipment, welding equipment, metal processing equipment, etc., can solve the problems of pollution in the working environment, large energy consumption in intermittent brazing, and complex structure, so as to achieve a pollution-free operating environment. , The effect of stable product quality and resource saving
Inactive Publication Date: 2012-05-16
广东增城市基业汽车空调有限公司
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Problems solved by technology
However, due to the complex structure of the aluminum alloy heat exchanger of the gas water heater, the qualified rate of intermittent brazing only accounts for about 85%. The intermittent brazing consumes a lot of energy, the quality of the product is unstable, and the working environment is polluted.
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[0028] The purpose of the present invention is achieved by the following technical process:
[0029] 1. Brazing material preparation
[0030] a. Flux
[0031] The flux is made of potassium fluoroaluminate mixture, which is composed of 76% KAlF 4 and 24% of K 2 AlF 5 ·H 2 O composition.
[0032] b. Preparation of flake convex ring solder
[0033] The brazing filler metal of the outlet pipe 9 of the aluminum alloy heat exchanger of the gas water heater, the small U-shaped tube 4, the large U-shaped tube 5 and the case shell 2 adopts an annular solder 7, and the height of the protruding ring is 1.3-1.6 millimeters. The above-mentioned annular solder 7 is coated with flux.
[0034] 2. Work piece degreasing
[0035] Remove the grease from the surface of the workpiece before brazing to obtain a water-wettable surface for uniform coating of solder and flux. Carry body pipe 1, case shell 2 and small U pipe 4, large U-shaped pipe 5, heat dissipation pipe 8 to clean in ultrason...
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Abstract
The invention discloses a method for continuously soldering an aluminum alloy heat exchanger of a gas water heater; the technical process comprises preparation of solder materials, and degreasing, cleaning, assembling, spraying and drying for a workpiece; the workpiece is conveyed to a soldering chamber by using a continuous transport line, and the soldering chamber is provided with five temperature regions. When the temperature of the soldering chamber reaches 400 DEG C, nitrogen protection equipment is opened; when the workpiece is heated to the temperature of a soldering flux melting point, the nitrogen enters the soldering chamber, welding transmission is started, the five temperature regions are started and the temperature is controlled between 610 DEG C and 618 DEG C. When the temperature in a first region reaches 610 DEG C, the workpiece enters the soldering chamber. When the temperature is over 558 DEG C, the soldering flux begins to melt. The soldered workpiece is cooled to the room temperature by using a water-cooled shade chamber and an air-cooled chamber, and the whole soldering process is finished. With adoption of the full-automatic continuous soldering process, the aluminum alloy heat exchanger of the gas water heater is soldered automatically and continuously, the rate of the continuous soldering finished products reaches 98%, and the conservation of resources, the stable quality of products and no pollution to the operating environment are achieved.
Description
technical field [0001] The invention relates to a brazing method for an aluminum alloy heat exchanger of a gas water heater, in particular to a continuous brazing method for an aluminum alloy heat exchanger of a gas water heater. Background technique [0002] The heat exchanger inside the ordinary gas water heater is generally made of copper material. The copper material is expensive, has a large specific weight, poor processing performance, and the processing pollutes the environment. The heat exchanger of the gas water heater is made of aluminum alloy material, which is more advantageous. The price of aluminum alloy material is lower, the specific gravity is light, and the processing performance is good. The key technology for making the heat exchanger inside the gas water heater from the aluminum alloy material is the welding process between the workpieces of the aluminum alloy material. At present, the welding process of aluminum alloy materials is to fill the position ...
Claims
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IPC IPC(8): B23K1/00B23K1/20B23K101/14
Inventor 夏顶基邝国军
Owner 广东增城市基业汽车空调有限公司