DE10062495C1 - Hollow sheet metal part has sloping base, side walls of different heights and slope-angles - Google Patents

Abstract

The sloping base (2) and the lower wall-parts (5,7) are preferably shaped by linear stamping and or drawing. The side walls (6,9) have a uniform cross-section on one or more shared swivel axes (14). The base is produced in a first phase, and the side walls in a second phase, by means of a linearly moving tool. The press-plunger and or bed plate can consecutively or simultaneously perform a linear and swivel movement/

Description

The invention relates to a hollow sheet metal part with a sloping bottom, of different heights Sidewalls and / or differently inclined sidewalls.

Such sheet metal parts are preferred, for example, in the manufacture of tanks for vehicles Cars or trucks used. U.S. Patent 2,560,822 shows such a sheet metal part as well as a method for producing this sheet metal part and a tool for carrying it out ren of the procedure. The sheet metal part described here and the method are suitable but not for the production of a component with a shaped base, as is the case with for example in vehicle tanks, preferably for cars. such Sheet metal parts are preferably produced by linear deep drawing and / or stamping.

The disadvantage here is that during deep drawing due to the non-vertical frame wall of the component folds of the second type occur. These can only be achieved by a Avoid holding the sheet metal tight enough so that the process window between folds and Tear is usually very tight, especially high-strength steel materials or aluminum mostly cannot be used.

The invention has for its object a hollow sheet metal part according to the preamble of claim 1 and to design a method for producing such a gene sheet metal part to find, which allows such a sheet metal part without wrinkling reliable to manufacture.

This object is achieved with a sheet metal part with the features of claim 1. The Solution according to the invention for a method for producing such a sheet metal part is described in claim 2. An advantageous education and training of the method  according to claim 2 is described in claim 3. In the features of the claims che 4 and 5 become solutions for the formation of a press or a tool demonstrated for performing the method according to claims 2 and 3.

The advantages achieved with the invention are in particular that, on the one hand hollow sheet metal parts with sloping bottom according to the preamble of claim 1 a sheet with a smaller wall thickness can be produced without this Wrinkles, especially wrinkles of the second kind, arise. It also has the advantage achieved that the floor embossing in their direction regardless of the design the parting plane of the tool can be designed.

An embodiment of the invention is shown in the drawing and is in fol described in more detail. Show it

Fig. 1 shows a section through a hollow sheet-metal part with an inclined bottom and different heights, and sloping side walls,

Fig. 2 shows the sheet metal part of Fig. 1 after the first step and

Fig. 3 shows the deformation of the sheet metal part during the second step.

The sheet metal part, as shown in Fig. 1, could for example be part of a fuel tank for a car. This part has a sloping floor 2 with respect to the opening plane 1 . The bottom 2 is formed with an indentation 3 and a recess 4 . Stiffening ribs can also be embossed in the bottom.

A wall 5 is inclined outwards. The other wall 6 , which is visible in the section according to FIG. 1, runs in the lower wall part 7 in an arc shape with a linearly adjoining region 8 . Furthermore, a stiffening rib 10 is provided on the rear wall 9, which extends perpendicular to the bottom 2 in the lower region.

Fig. 2 shows the preparation of the lower region 11 shows the sheet metal part. This area 11 with the bottom 2 , the wall 5 and the lower wall part 7 of the wall 6 is produced by line ares deep drawing and embossing. In particular, the floor 2 is no longer given a shaping change in further operations. Cutting or punching operations can still follow later. The forming direction 12 is shown with an arrow.

In Fig. 3 the further processing of the hollow sheet metal part is shown. In this Bear processing takes place the forming direction 13 , also shown by an arrow, rotating about a pivot axis 14 . This means that all further wall parts 15 , 16 are given a constant cross-section with respect to the pivot axis 14 . This can be seen very clearly in the further course of the stiffening rib 10 .

In the above-described hollow sheet metal part with an inclined bottom 2 , which is produced according to the features of claim 2, material with a smaller wall thickness can be used, since here the type of deep-drawing deformation is designed such that the risk of wrinkles, in particular the risk of developing wrinkles of the second kind is reduced. Furthermore, the surface quality is improved by reducing the ripple in the floor, so that the method is also particularly suitable for the production of outer skin parts.

LIST OF REFERENCE NUMBERS

1

opening plane

2

ground

3

impressing

4

deepening

5

wall

6

wall

7

wall part

8th

Area

9

rear wall

10

stiffening rib

11

Area

12

forming direction

13

forming direction

14

swivel axis

15

wall part

16

wall part

Claims (5)

1. Hollow sheet metal part with sloping bottom ( 2 ), differently high side walls and / or differently inclined side walls, characterized in that the bottom ( 2 ) and the lower wall parts ( 5 , 7 ) are preferably shaped by linear embossing and / or drawing and the side walls ( 6 , 9 ) have a constant cross section running around one or more common pivot axes ( 14 ). 2. Method for producing a hollow sheet metal part with an inclined bottom ( 2 ), side walls of different heights and / or differently inclined sides by deep drawing, the bottom ( 2 ) in a first step using a linearly moving tool and the side walls ( 6 , 9 ) in a second step using a swiveling tool, characterized in that the bottom ( 2 ) and the directly adjoining lower wall parts ( 5 , 7 ) receive their final shape in the first step and are no longer formed in the second step , 3. The method according to claim 2, characterized in that the working steps be carried out in two or more pressing or drawing operations. 4. Press for performing the method according to claim 2 or claim 3, characterized in that the press ram and / or the press table both a linear and a swiveling movement simultaneously or in time perform one after the other. 5. Tool for performing the method according to claim 2 or claim 3 on a press with linear movement, characterized in that the Tool is pivoted to the press table via a separate drive.