Welding method for vehicle door inner plate assembly

Abstract

The invention discloses a welding method for an vehicle door inner plate assembly, and belongs to the technical field of automobile welding. The welding method comprises the following steps that S1, afirst welding procedure is carried out, specifically, laser welding is carried out on the inner surface of a vehicle door inner plate, and the surplus height of seams of laser welding form protrusions with the height of L on the inner surface of the vehicle door inner plate; S2, the vehicle door inner plate and a reinforcing plate are assembled in an attached mode, and assembly gaps are generatedthrough the protrusions when the vehicle door inner plate and the reinforcing plate are assembled in an attached mode; S3, a second welding procedure is carried out, specifically, the vehicle door inner plate and the reinforcing plate are welded through laser welding; and in the step S1, the back face of the vehicle door inner plate is padded with a copper plate so as to absorb redundant weldingenergy. According to the welding method, by padding the back face of the vehicle door inner plate with the copper plate, the redundant welding energy in the welding process is absorbed, so that the situation that the welding seam protrusions are generated on the back face of the vehicle door inner plate to affect the the appearance of a vehicle door is avoided.

Description

technical field [0001] The invention relates to the technical field of automobile welding, in particular to a welding method for a car door inner panel assembly. Background technique [0002] figure 1 It is a structural schematic diagram of the door inner panel assembly in the present invention, refer to figure 1 , the door inner panel assembly 100 of the automobile generally consists of the door inner panel 10 and various door linings welded on the inner side of the door inner panel 10. The specific door lining includes: a door stopper reinforcing plate, a door lock reinforcing plate 24 , door lock pull-in motor support 23, upper hinge reinforcement plate 21, car door window frame reinforcement plate 25, lower hinge reinforcement plate 22 etc.; In the traditional process, the door inner panel assembly 100 uses spot welding to connect the door inner panel 10 and the above-mentioned reinforcement plate 20, and part of the welding spot indentation is still visible after pain...

AI Technical Summary

Problems solved by technology

Since the door inner panel 10 is usually made of galvanized steel plate, under the high temperature of the laser, the zinc volatilizes into zinc vapor, which may easily cause welding defects such as pores in the weld seam, and affect the normal progress of the welding process.

In the prior art, a protrusion is usually formed on the inner surface of the door inner panel 10 by laser welding or stamping to reasonably arrange the assembly gap between the door inner panel 10 and the reinforcing plate 20 to form a channel for zinc vapor to escape; but due to The door inner panels 10 are relatively thin, and slight fluctuations in welding parameters, sheet surface cleanliness, or sheet flatness will lead to the phenomenon of welding through thin sheets, and unnecessary weld protrusions will be formed on the back of the door inner panel 10, affecting the appearance of the door.

Images