Method for avoiding rippled edge of lower protective plate of vehicle body

Abstract

The invention discloses a method for preventing a vehicle body lower protection plate from generating a wavy edge, which comprises the following steps: S1, a formed vehicle body lower protection plate is provided with buckle fixing seats matched with buckles, and the buckle fixing seats are arranged along a flanging on one side of the vehicle body lower protection plate; s2, an auxiliary structure for avoiding the wavy edge is arranged between the turned edge of the vehicle body lower protection plate and the buckle fixing base, and the auxiliary structure for avoiding the wavy edge can make the supporting force of all parts of the turned edge consistent; and S3, the turned-over edge on the vehicle body lower protection plate is detected, the vehicle body lower protection plate is sprayed after being qualified, and the vehicle body lower protection plate is assembled after being detected to be qualified. By the adoption of the method, the problem that the turned-over edge of the vehicle body lower protection plate is prone to generating the wavy edge in the injection molding process can be effectively solved, the turned-over edge of the vehicle body lower protection plate does not generate the wavy edge after spraying, the subsequent shape correcting procedure is not needed any more, the labor cost and the manufacturing cost are reduced, the manufacturing period is shortened, and the production efficiency is improved. And meanwhile, the problem of unstable quality does not exist, and the forming quality of the vehicle body lower protection plate is ensured.

Description

technical field [0001] The invention relates to the technical field of vehicle body structures, in particular to a method for avoiding wavy edges on the lower guard plate of the vehicle body. Background technique [0002] At present, the body lower guard plate can be generally more than 2 meters long according to the needs of the vehicle chassis, while the upper flanging is long, and the flanging position is easy to deform. Most of them are injection molding and painting, and basically one or more decorative parts can be designed. To embellish; the traditional lower guard plate of the body generally has a plurality of buckle fixing seats, and the buckle fixing seat is used to cooperate with the positioning column and a plurality of buckles, and is connected to the body sheet metal through the buckles; in the traditional There are some problems in the design method of the s Since the area between two adjacent snap-fit ​​seats has no support, its shrinkage and deformation are...

AI Technical Summary

Problems solved by technology

[0002] At present, the lower guard plate of the car body can generally be more than 2 meters long according to the requirements of the vehicle chassis, while the upper flange is longer, and the flange position is easy to deform. Most of them are injection molded and painted, and basically one or more decorative parts can be designed To embellish; the traditional car body lower guard generally has multiple buckle fixing seats, and the buckle fixing seats are used to cooperate with the positioning column and multiple buckles, and are connected to the body sheet metal through the buckles; in the traditional There are some problems in the design method: through the mold flow analysis and the actual injection molding verification, it can be seen that the area where the flange of the lower body guard plate has a snap-fit ​​seat is well supported, and the shrinkage deformation is small, while The area between two adjacent buckle fixing seats has a large shrinkage deformation due to no support, and the degree of deformation will be aggravated after painting, resulting in serious wavy edges on the upper surface and inside the entire flange. In the case of receiving deformation, the customer is easy to see the defect and cannot accept it

For severe wavy edges, the traditional solution is to increase post-process calibration: calibration after injection molding, calibration after painting fixtures, and calibration after assembly, which not only increases labor and manufacturing costs, but also prolongs the manufacturing cycle. The problem of unstable quality due to the easy rebound of the shape

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