A welding tool for copper pipe and aluminum pipe
A technology for welding tooling and aluminum tubes, applied in the field of resistance welding, which can solve the problems of high welding cost, low efficiency, and poor welding environment
Active Publication Date: 2015-12-02
SHENGZHOU XINGAOLUN REFRIGERATION EQUIP
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Problems solved by technology
[0002] At present, in the field of metal welding, most of the welding between aluminum tubes and copper tubes adopts the method of flux and flame brazing, that is, adding brazing material between copper tubes and aluminum tubes and then using high temperature oxygen and acetylene. The flame melts the solder to achieve the purpose of welding, but these welding methods have disadvantages such as low efficiency, high welding cost, and poor welding environment.
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[0012] Example: such as figure 1 As shown, a welding tool for copper pipes and aluminum pipes includes a T-shaped tie rod and a baffle plate, a T-shaped head is arranged on the T-shaped tie rod, and an external electrode is arranged on the outside of the copper pipe to be welded, and the external electrode is connected to the power line; Internal electrodes are installed at the welding place inside the tube, and the internal electrodes are connected to the power line. The taper of the T-shaped head is 6-10 degrees, which is convenient for the T-shaped rod to exert pressure on the internal electrodes during welding; taper is also set on the internal electrodes. , the taper is consistent with the taper of the T-shaped head, so that the internal electrode is more uniform in force; the T-shaped tie rod is made of insulating material.
[0013] The method of using the above-mentioned welding tool to weld the copper tube and the aluminum tube is as follows: (1) outside the copper tub...
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The invention discloses a tool for welding a copper pipe and an aluminum pipe. The tool comprises a T-type pull rod and a baffle. An external electrode is arranged at the position, needing to be welded, of the exterior of the copper pipe, an internal electrode is arranged at the position, needing to be welded, of the interior of the aluminum pipe, and the external electrode and the internal electrode are connected with power lines. When the copper pipe and the aluminum pipe are welded through the welding tool, the internal electrode is extruded by a T-type head of the T-type pull rod, the pressure is transmitted to the wall of the aluminum pipe, the pressure borne by the wall of the aluminum pipe ranges from 1.3 Kg / cm2 to 3.9 Kg / cm2, a direct current is applied to enable discharging to be generated between the internal electrode and the external electrode, the discharging time ranges from 50 ms to 200 ms, the maximum current ranges from 13000 A to 28000 A, after welding is completed, the T-type pull rod is pushed to enable the internal electrode to be separated from the aluminum pipe, and a completely-welded welding piece can be taken out. According to the tool, circumference welding is carried out on the copper pipe or a copper alloy pipe and the aluminum pipe through the specially-made electric-resistance-welding welding tool and the welding technology, complete liquid-phase nuggets can be obtained, and true welding is achieved.
Description
technical field [0001] The invention belongs to the technical field of electric resistance welding, and in particular relates to a welding tool for copper pipes and aluminum pipes. Background technique [0002] At present, in the field of metal welding, most of the welding between aluminum tubes and copper tubes adopts the method of flux and flame brazing, that is, adding brazing material between copper tubes and aluminum tubes and then using high temperature oxygen and acetylene. The flame melts the solder to achieve the purpose of welding, but these welding methods have disadvantages such as low efficiency, high welding cost, and poor welding environment. [0003] Resistance welding is to use the resistance heat generated by the resistance of the metal to be welded to pass through the current. When welding, a certain pressure is applied to the metal to be welded to achieve the purpose of welding. However, the melting point of copper and its alloys is about 1080 ° C, while ...
Claims
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IPC IPC(8): B23K11/00B23K11/36
CPCB23K11/002B23K11/02B23K11/364B23K2101/06B23K2103/10B23K2103/12
Inventor 王志祥
Owner SHENGZHOU XINGAOLUN REFRIGERATION EQUIP