CN104401404A

CN104401404A - Automobile carriage chassis longitudinal beam

Info

Publication number: CN104401404A
Application number: CN201410694751.8A
Authority: CN
Inventors: 刘权
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-27
Filing date: 2014-11-27
Publication date: 2015-03-11

Abstract

The invention discloses an automobile carriage chassis longitudinal beam and relates to the technical field of automobile manufacture. The cross section of the longitudinal beam is in a shape of a rectangle through rolling drawing, one long side of the rectangle is higher than the rectangle and extends out in the horizontal direction outside the cross section of the rectangle, and the end of the rectangle short side adjacent to the higher end of the long side is welded and fixed to the long side. The problems of high production cost, low production efficiency, poor longitudinal beam strength and poor appearance existing in the manufacturing process of the automobile carriage chassis longitudinal beam can be solved.

Description

Automobile bodies longitudinal beam of underframe

Technical field

The present invention relates to field of automobile, especially a kind of for the manufacture of automobile bodies longitudinal beam of underframe.

Background technology

Automobile bodies underframe as shown in Figure 1 is generally welded by longeron 2, edge sealing crossbeam 1, crossbeam 3, tumble a crossbeam and tipping pitman 5, wherein longeron 2 is that whole underframe carries the maximum main force's beam of carriage weight, its length is usually between 5.6 meters ~ 9.6 meters, cross sectional dimensions designing requirement is that 160mm × 90mm × 10mm(is high × wide × thick), highest point is 200 mm apart from bottom surface, and the height to width ratio of cross-sectional plane is more than 1.8; At present, the technique manufacturing this carriage chassis longeron is generally adopt to distinguish bending " Z " shape and " 7 " shape by after two block plate blankings by flanging machine, make-up is welded mutually again, main weld is upper and lower two roads, as shown in Figure 2, the automobile bodies longitudinal beam of underframe that this fabrication process goes out exists: 1, manufacturing cost is high, and production efficiency is low; Because want blanking secondary bending and forming again, and welding two road weld seams, the operating personal time is also longer; 2, add through secondary bending the carriage chassis longeron that two road weld seam manufacture technics go out, overall appearance is poor, longeron straightness accuracy is difficult to reach requirement, and because longeron weld seam is longer, welding deformation is also difficult to avoid; 3, because the carriage chassis longeron of this explained hereafter need weld two road weld seams, cause longeron intensity not high.

Summary of the invention

The object of this invention is to provide a kind of automobile bodies longitudinal beam of underframe, it can solve, and the productive costs existed in current automobile bodies longitudinal beam of underframe manufacturing process is high, production efficiency is low and longeron intensity is not high, the problem of appearance poor.

In order to solve the problem, the technical solution used in the present invention is:

This automobile bodies longitudinal beam of underframe, the cross sectional shape of longeron is the oblong by rolling drawing, this rectangular wherein long limit exceeds described oblong and stretches out to the horizontal direction outside described rectangular cross-sectional, exceeds hold adjacent described its termination of oblong minor face and this long limit to be welded and fixed with this long limit.。

In above technical scheme, further scheme is: the height to width ratio of the rectangular cross-sectional of described longeron is 1.5 ~ 2.

Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:

1, the present invention adopts the rolling drawing forming technology of domestic initiation, the longitudinal beam of underframe of changing over can only first make two bending parts again assembly welding become the technique of longitudinal beam of underframe, longeron intensity that the existing technique of longitudinal beam of underframe intensity ratio made obtains improves 20%;

2, adopt the present invention, greatly can save rolled steel dosage, use the longitudinal beam of underframe of two 6 meters long to calculate by every platform lorry compartment, every platform reduces material cost 72 kilograms, and by steel 3.5 yuan of/kilogram of calculating, every platform reduces material cost 72 × 3.5=252 unit/platform; And weld seam 12 meters can be reduced, reduce welding wire cost and about 50 yuan of welder's expense, cost-saving 300 yuan altogether, every chassis;

3, adopt the present invention, fusion length greatly reduces, and longeron deflection greatly reduces, and under longitudinal beam of underframe and bottom plate of dump truck, flat board is fitted more, and whole automobile bodies longitudinal beam of underframe is more attractive in appearance, and presentation quality improves greatly.

Accompanying drawing explanation

Fig. 1 automobile bodies longitudinal beam of underframe birds-eye view.

Fig. 2 prior art A-A place cutaway view.

Fig. 3 A-A place of the present invention cutaway view.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is further described: as shown in Figure 1, Figure 3

This automobile bodies longitudinal beam of underframe, the cross sectional shape of longeron 2 is the oblong made by rolling drawing technique, the long limit, left side of this rectangular cross-sectional exceeds rectangular cross-sectional and stretches out to left side horizontal direction outside rectangular cross-sectional, exceeding with this long limit holds adjacent its termination of rectangular minor face and this long limit to be welded and fixed, and the height to width ratio of rectangular cross-sectional is 1.5 ~ 2.

Claims

1. an automobile bodies longitudinal beam of underframe, it is characterized in that: the cross sectional shape of longeron (2) is the oblong by rolling drawing, this rectangular wherein long limit exceeds described oblong and stretches out to the horizontal direction outside described rectangular cross-sectional, exceeds hold adjacent described its termination of oblong minor face and this long limit to be welded and fixed with this long limit.

2. automobile bodies longitudinal beam of underframe according to claim 1, is characterized in that: the height to width ratio of the rectangular cross-sectional of described longeron (2) is 1.5 ~ 2.