FIELD OF INVENTION
This invention relates to improved tailored welded blanks in a vehicle to improve yield. Said provision is made on both right and left side of the front door. The provision comprises of taper blanks in thicker side of the welded blanks.
PRIOR ART OF THE INVENTION
Currently, usage of tailored welded blanks is increasing day by day so as to reduce the vehicle weight. The tailored welded blank comprising of two blanks of different thickness welded together.
Presently available front door inner R/L tailored welded blanks are provided in conventional shapes as shown in fig. 1.
However, the disadvantage associated with the aforesaid tailored welded blank is that, it requires more material. This makes it expensive.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide improved tailored welded blanks in a vehicle to improve yield which overcomes disadvantages associated with the prior art.
Another object of the present invention is to provide improved tailored welded blanks in a vehicle to improve yield which is cost effective.
Further object of the present invention is to provide improved tailored welded blanks in a vehicle to improve yield which is simple in construction.
STATEMENT OF INVENTION
According to this invention, there is provided an improved tailored welded blanks in a vehicle to improve yield comprising of a thinner blank welded to a thicker blank provided in the front door wherein said thicker blank is tapered.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows: conventional front door inner right/left tailored welded blanks.
Fig. 2 shows: front door inner panel.
Fig. 3 shows: tapered blank in thicker side.
Fig. 4 shows: an exemplary embodiment of the coil.
Fig. 5 shows: an exemplary embodiment of a blank.
Fig. 6 shows: blank of fig. 5 after shearing
Fig. 7 shows: processed edge of blank.
Fig. 8 shows: welded thinner and thicker blank.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:
The present invention discloses improved tailored welded blanks in a vehicle to improve yield. Reference may be made to fig. 1, in which the thinner and thicker blanks in rectangular shape are welded together along the edge. The edges for welding is required to be taken care because poor edge leads to poor welding, which ultimately results in crack of panel after formability.
Now, referring to fig. 3, wherein the thicker blank is having a tapered section so as to save the material, which was going waste in the prior art.
Process steps for preparing tapered thicker blank
The thinner blank of tailored welded blanks remains the same and the thicker blank is provided with a new shape.
In an exemplary embodiment, a coil of width 1050 mm is provided with length of 1935mm as shown in fig. 4. The coil is divided into three blanks of length 1935 mm and width of 350 mm as shown in fig. 5.
This is followed by shearing each blank to obtain atleast two blanks of length 1080 mm and 855 mm.
As already discussed, edges are important to be processed carefully for welding. Hence, as shown in fig. 7 shearing of for example 5 mm is carried out along one edge for welding.
Thereafter, thinner blank and thicker blank are welded along the edge as indicated in fig. 8 to obtain tailored welded blank.
Test Results
post Savings details
(Table Removed)
Trials Results
Formability Trials (10pcs) were parried out after getting the Tailored Welded blanks processed and the results were found to be OK.
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-

WE CLAIM:
1. An improved tailored welded blanks in a vehicle to improve yield comprising of a thinner blank welded to a thicker blank provided in the front door wherein said thicker blank is tapered.
2. An improved tailored welded blanks as claimed in claim 1, wherein said thinner blank and thicker blank are welded along edge.
3. An improved tailored welded blank as claimed in claim 1 or 2, wherein said edge of the thicker blank for welding is sheared.
4. An improved tailored welded blanks in a vehicle to improve yield substantially as herein described with reference to the accompanying drawings.