Automobile front door ring, manufacturing method thereof and automobile

Abstract

The invention discloses an automobile front door ring which comprises an automobile A column comprising an A column upper section and an A column lower section, and the A column upper section is provided with a first soft area used for being welded to a roof cross beam; the automobile front door ring also comprises an automobile B column which comprises a B column upper section and a B column lower section; a front threshold, wherein the front and rear ends of the front threshold are respectively fixed with the rear side of the lower part of the column A lower section and the front side of thelower part of the column B lower section; and a rear threshold which is fixed with the rear side of the B column lower section; the A column upper section except the first soft area, the A column lower section, the B column upper section, the front threshold and the rear threshold are all hard areas, and the B column lower section is a second soft area. The invention further discloses a manufacturing method of the automobile front door ring and an automobile comprising the automobile front door ring. According to the automobile front door ring, the manufacturing method of the automobile frontdoor ring and the automobile, the automobile A column and the automobile roof cross beam are not prone to cracking, the front door ring is good in buffering performance and capable of contracting toabsorb energy in the collision process, the deformation of the front door ring can be controlled, the heads of a driver and passengers can be protected, and the safety is good.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to an automobile front door ring, a manufacturing method thereof and an automobile. Background technique [0002] The front door ring of a car is an important structural part of the body frame. The front door ring of a car is connected end to end by the A-pillar, the B-pillar and the front sill. In the current automobile manufacturing, in order to improve the strength of the automobile body, the A-pillar, the B-pillar and the front sill of the automobile all adopt ultra-high-strength rigid plates. The existing automobile front door ring mainly has the following problems: [0003] 1. When a car collides, due to the overall strength of the car body and poor cushioning, accidents such as rollover are prone to occur; [0004] 2. Since the front door ring of the car is made of rigid plates as a whole, the deformation and damage of the front door ring cannot be controlled when it ...

AI Technical Summary

Problems solved by technology

[0003] 1. When a car collides, due to the overall strength of the car body and poor cushioning, accidents such as rollover are prone to occur;

[0004] 2. Since the front door ring of the car is made of rigid plates as a whole, the deformation and damage of the front door ring cannot be controlled when it is hit. If the upper part of the front door ring is severely deformed or broken, it will cause fatal injuries to the heads of the drivers and passengers. poor security;

[0005] 3. The two ends of the roof beam are respectively welded to the A-pillars on the left and right sides of the car body. The A-pillar and the roof beam are directly welded through rigid plates. The welding spot area is easy to form a low-strength area. Cracks are prone to occur in the solder joint area of ​​pillars and roof beams, and the broken A-pillars and roof beams of the car are likely to cause fatal injuries to drivers and passengers, and the safety is poor;

[0006] 4. The existing automobile front door knocker is assembled by welding and assembling single-piece products: automobile A-pillar, automobile B-pillar and front door sill. The separate manufacturing of each part requires different molds and processes, and the cost is high and the process is complicated.

Images