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Protruding point welding method of automobile fuel tank and fixing flange

A technology for automotive fuel tanks and fixed flanges, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve problems such as gaps in points, frequent replacement of electrode heads, and weak welding, so as to achieve firm welding and improve welding quality , The effect of improving welding efficiency

Inactive Publication Date: 2015-04-01
BENGBU TONGDA AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fixed flange on the automobile fuel tank is used to fix the connecting part between the oil quantity sensor and the oil suction pipe. The fixed flange and the automobile fuel tank body are usually connected by point-by-point spot welding. At present, spot welding is generally used. The machine is connected by point-by-point resistance spot welding, which is prone to false welding and false welding during the spot welding process, and the welding is not firm; the welding lip is easily formed into a gap by the upper electrode, resulting in oil leakage; the upper and lower electrodes are in point contact. , so that the electrode wears seriously, the frequency of replacing the electrode head is high, and the replacement cost of equipment parts is high; in addition, in order to ensure the strength of the welding of the fixed flange and avoid damage to the lip and cause oil leakage, each fixed flange needs to be fixed at a different position. Welding many times, and each automobile fuel tank needs to spot weld multiple fixed flanges. All welding is done manually by the operator, which is labor-intensive and low-efficiency

Method used

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  • Protruding point welding method of automobile fuel tank and fixing flange
  • Protruding point welding method of automobile fuel tank and fixing flange
  • Protruding point welding method of automobile fuel tank and fixing flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Taking an automobile fuel tank body with a material thickness of 1.0mm and a fixed flange with a thickness of 3.0mm as an example, the present invention provides a bump welding method for an automobile fuel tank and a fixed flange, which includes the following steps:

[0021] a) combine figure 2 and image 3 As shown, the fixed flange 5 includes five threaded mounting holes 6, and five arc-shaped convex points 7 are punched out along the annular disk surface of the fixed flange, and the convex points 7 are arranged at intervals from the threaded mounting holes 6 of the fixed flange; According to different types of fixed flanges, the bumps 7 and the threaded mounting holes 6 can be set at an interval of 10-15mm;

[0022] b) combine figure 1 , Figure 4 and Figure 5 As shown, the automobile fuel tank body 4 is placed on the lower electrode 3 of the numerical control projection welding machine 1, and the welding lip 8 of the automobile fuel tank body 4 is matched...

Embodiment 2

[0026] Taking an automobile fuel tank body with a material thickness of 1.5mm and a fixed flange with a thickness of 3.0mm as an example, the present invention provides a bump welding method for an automobile fuel tank and a fixed flange, and steps a to c are the same as those in Embodiment 1. In step d, on the CNC projection welding machine 1, set the preloading time to 65s, the off-pressure time to 30s, the preheating time to 4s, the preheating current to 80A, the welding time to 5s, the welding current to 84A, the postheating current to 35A, the maintenance time to 10s, and the cylinder to work The pressure is 0.45 MPa, start the numerical control projection welding machine 1, the cylinder 9 drives the upper electrode 2 to press down, and through the cooperation of the upper electrode 2 and the lower electrode 3, the automobile fuel tank body and the fixed flange are welded.

Embodiment 3

[0028] Taking an automobile fuel tank body with a material thickness of 1.0 mm and a fixed flange with a thickness of 4.0 mm as an example, the present invention provides a bump welding method for an automobile fuel tank and a fixed flange. Steps a to c are the same as those in Embodiment 1. In step d, set preloading time 65s, off-pressure time 30s, preheating time 4s, preheating current 80A, welding time 4s, welding current 86A, post-heating current 35A, maintenance time 10s, cylinder work on CNC projection welding machine 1 The pressure is 0.5MPa, start the numerical control projection welding machine 1, the cylinder 9 drives the upper electrode 2 to press down, and through the cooperation of the upper electrode 2 and the lower electrode 3, the automobile fuel tank body and the fixed flange are welded.

[0029] When the upper electrode 2 and the lower electrode 3 of the CNC projection welding machine 1 are welded together, heat is released, and the bumps of the fixed flange 5...

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Abstract

The invention discloses a protruding point welding method of an automobile fuel tank and a fixing flange. The protruding point welding method comprises the following steps of step a, stamping out a group of protruding points along the annular plate surface of the fixing flange; step b, placing a tank body of the automobile fuel tank on a lower electrode of a numerical control projection welding machine and enabling a welding lip of the tank body of the automobile fuel tank to be matched with a boss of the lower electrode of the numerical control projection welding machine; step c, placing the fixing flange at the position of the welding lip of the automobile fuel tank and enabling the protruding point surface of the fixing flange to be in contact with the top surface of the tank body of the automobile fuel tank; step d, starting the numerical control projection welding machine and welding the tank body of the automobile fuel tank and the fixing flange through the match of an upper electrode and the lower electrode of the numerical control projection welding machine. According to the protruding point welding method of the automobile fuel tank and a fixing flange, the protruding points formed on the fixing flange and base materials of the tank body of the automobile fuel tank are instantaneously fused through the match of the upper electrode and the lower electrode and accordingly the purpose of the firm welding is achieved and the welding lip is not damaged and the welding is formed in one-step mode and accordingly the welding efficiency is greatly improved; the welding process is automatically achieved through the numerical control projection welding machine, different welding parameters can be set according to different products, and accordingly the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of automobile oil tank manufacturing, in particular to a bump welding method for an automobile oil tank and a fixed flange. Background technique [0002] The fixed flange on the automobile fuel tank is used to fix the connecting part between the oil quantity sensor and the oil suction pipe. The fixed flange and the automobile fuel tank body are usually connected by point-by-point spot welding. At present, spot welding is generally used. The machine is connected by point-by-point resistance spot welding, which is prone to false welding and false welding during the spot welding process, and the welding is not firm; the welding lip is easily formed into a gap by the upper electrode, resulting in oil leakage; the upper and lower electrodes are in point contact. , so that the electrode wears seriously, the frequency of replacing the electrode head is high, and the replacement cost of equipment parts is high; in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/04
CPCB23K11/14
Inventor 范昌禹陈义虎陈长同向南陈靖
Owner BENGBU TONGDA AUTO PARTS
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