Low-temperature cold shield thin-wall aluminum alloy guide pipe structure and vacuum brazing process and application thereof
A technology of brazing technology and aluminum alloy tubes, which is applied in metal processing, metal processing equipment, welding equipment, etc., can solve the problems of high customization cost, long cycle, and inability to guarantee aluminum tubes, etc., and achieve high space utilization, stress and The effect of small deformation and high production efficiency
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Embodiment 1
[0047] a. Set the furnace temperature to 600°F, turn on high vacuum, turn on the heating block to heat, as the furnace temperature rises to 600°F, set the furnace temperature to increase by 50°F each time until the furnace temperature is set to 800°F, each time At intervals of 10 minutes, control the heating rate of the workpiece to be 3°F / min, and record the brazing data every 10 minutes;
[0048] b. When the temperature of the workpiece reaches 700°F, set the furnace temperature to 900°F, set the furnace temperature to increase by 50°F every 10 minutes, until the furnace temperature is set to 1050°F;
[0049] c. When the maximum temperature of the workpiece reaches 995~1000℉, the temperature is averaged until the temperature of the workpiece reaches 1000℉. At this time, the vacuum degree of the furnace body is required to be ≤5.0×10 -3 Pa, if the vacuum degree does not meet the requirements, it is allowed to extend the temperature averaging time for 30 minutes to wait for th...
Embodiment 2
[0054] a. Set the furnace temperature to 620°F, turn on the high vacuum, turn on the heating block to heat, as the furnace temperature rises to 620°F, set the furnace temperature to increase by 70°F each time until the furnace temperature is set to 760°F, each time At intervals of 20 minutes, control the heating rate of the workpiece to be 2°F / min, and record the brazing data every 10 minutes;
[0055] b. When the temperature of the workpiece reaches 670°F, set the furnace temperature to 880°F, and set the furnace temperature to increase by 70°F every 20 minutes until the furnace temperature is set to 1020°F;
[0056] c. When the maximum temperature of the workpiece reaches 965~970℉, the temperature is averaged until the temperature of the workpiece reaches 970℉. At this time, the vacuum degree of the furnace body is required to be ≤5.0×10 -3 Pa, if the vacuum degree does not meet the requirements, it is allowed to extend the temperature averaging time for 30 minutes to wait f...
Embodiment 3
[0061] a. Set the furnace temperature to 550°F, turn on the high vacuum, turn on the heating block to heat, as the furnace temperature rises to 550°F, set the furnace temperature to increase by 40°F each time until the furnace temperature is set to 830°F, each time The heating rate of the workpiece is controlled to be 4°F / min at intervals of 6 minutes, and the brazing data is recorded every 10 minutes;
[0062] b. When the temperature of the workpiece reaches 720°F, set the furnace temperature to 980°F, set the furnace temperature to increase by 40°F every 6 minutes, until the furnace temperature is set to 1080°F;
[0063] c. When the maximum temperature of the workpiece reaches 1015~1020°F, the temperature is averaged until the temperature of the workpiece reaches 1020°F. At this time, the vacuum degree of the furnace body is required to be ≤5.0×10 -3 Pa, if the vacuum degree does not meet the requirements, it is allowed to extend the temperature averaging time for 30 minutes...
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