DE4322061C1 - Apparatus for the simultaneous production of a plurality of component hollow bodies by the internal high-pressure forming method - Google Patents

Abstract

An apparatus for the simultaneous production by the internal high-pressure forming method of a plurality of component hollow bodies, at least some of which are different, for a hollow-body arrangement constructed from these component hollow bodies comprises a forming press (1, 2) with die arrangements (31-34) and an internal high-pressure source common to a number of them. The forming press (1, 2) has a press table (1) and a press ram (2) which is arranged above the latter and can be moved up and down. Each of the die arrangements (31-34) has a bottom die (35) mounted on the press table (1), a top die (36) mounted on the press ram (2), and forming rams (37). The die arrangement (31-34) for each component hollow body can be controlled independently of the others in terms of the forming carried out. Such an apparatus is of particularly simple construction if all the bottom dies (35) of the die arrangements (31-34) are mounted on the press table (1) and all the top dies (36) are mounted on the press rams (2) of the forming press (1, 2) common to all the die arrangements (31-34). <IMAGE>

Description

The invention relates to a device for simultaneous production several, at least partially different parts hollow body for one of these partial hollow bodies existing hollow body to the inside high pressure forming process, consisting of a forming press with several tool arrangements and one inside high pressure source, the forming press a press table and one arranged above, up and down movable press ram and the tool arrangements lower die attached to the press table, one on Press ram attached upper die and axially Movable forming plunger, the forming plunger a feed to Introducing a pressure medium into the interior of the have respective partial hollow body to be formed.

As is well known, the hydroforming process is well known inserted a pipe into a tool arrangement and with Help one over at least one of the forming rams introduced pressure medium against the inner contour of the Tool arrangement, the the outer contour of the corresponds hollow body, expanded. For the Production of several different partial hollow bodies for an existing of these partial hollow bodies Hollow bodies are usually used in such a way that the different partial hollow bodies in succession are produced, with a change of Partial hollow body design a conversion of the forming Press or change the tool arrangement made  must become. This is very time-consuming especially since the individual partial hollow bodies are temporarily stored must be until the last type of partial hollow body is manufactured or with the assembly to the hollow body can be started. Basically it is possible for the different partial hollow bodies to provide their own forming press, that would be but far too expensive.

A device for producing a is known Double basin sink after the hydromechanical Inverted drawing process (DE 22 61 955 B2). Furthermore, one Forming press known (JP abstract 57-44426 A), at which the forming by lifting one versus one Press table up and down movable press ram is made and obviously two identical Bodies are reshaped at the same time. That has the above So far, problems of a solution have not been brought closer.

The invention is therefore based on the object Specify device of the type mentioned, the with a simple construction, the simultaneous Production of several partial hollow bodies allowed, so that continuous assembly to the hollow body is made possible.

The achievement of this task results from claim 1.  

The invention is based on the knowledge that all tool arrangements in a single forming press can be provided because all tool arrangements - in contrast to, for example, deep drawing / stretch drawing - closed with the same stroke of the press ram can be while reshaping despite one common source of internal high pressure according to the different tool arrangements individually can be controlled. As a result, the invention is appropriate device simply built and it will a continuous assembly of the hollow body from the different partial hollow bodies possible.

For further development there are within the Invention several ways. To the moving masses keeping the forming press as small as possible is recommended it, the ram of the tool assemblies Assign press table to the forming press.

In the following the invention is based on a Exemplary embodiment drawing closer explained. They show a schematic representation

Fig. 1 is a side view of a device and

FIG. 2 is a top view of the subject of FIG. 1.

The device shown in the figures is used to produce a plurality of different partial hollow bodies for a hollow body consisting of these partial hollow bodies according to the internal high-pressure forming process. For example, this could involve the production of four molded parts for a car exhaust system. In its basic structure, the device consists of a forming press with an internal high-pressure source (not shown). The forming press has a press table 1 and a press ram 2 which is arranged above and can be moved up and down. A tool arrangement 31 , 32 , 33 , 34 is provided for each of the four partial hollow bodies, which can be controlled independently of the shape. Each of these tool arrangements 31-34 has a lower die 35 attached to the press table 1 , an upper die 36 attached to the press ram 2 , and axially movable forming tappets 37 . In any case, all lower dies 35 of the tool assemblies 31-34 are attached to the press table 1 and all upper dies 36 to the press ram 2 of the forming press common to all the tool assemblies 31-34 . The forming rams 37 of the tool arrangements 31-34 are assigned to the press table 1 of the forming press together with the lower dies 35 . The individually form-controllable tool arrangements 31-34 are jointly connected to the internal high pressure source.

The functioning of the described device is shown in the figures: After inserting the pipe sections into the lower dies 35 , the upper dies 36 are moved onto the lower dies 35 using the press ram 2 . Internal hydroforming then begins, with each of the tool assemblies 31-34 being individually controlled. After the forming, the forming press is opened again and the individual partial hollow bodies can be removed and assembled into a hollow body.

Claims (2)

1. Device for the simultaneous adjustment of a plurality of at least partially different partial hollow bodies for a hollow body consisting of these partial hollow bodies according to the hydroforming process, consisting of a forming press with a plurality of tool arrangements ( 31 , 32 , 33 , 34 ) and an internal high pressure source, the forming press being a press table ( 1 ) and a press ram ( 2 ) arranged above and movable up and down, and the tool arrangements each have a lower die ( 35 ) attached to the press table ( 1 ), an upper die ( 36 ) attached to the press ram ( 2 ) and axially movable forming ram ( 37 ), the forming rams ( 37 ) having a feed for introducing a pressure medium into the interior of the respective partial hollow body to be formed, all lower dies ( 35 ) are attached to the press table ( 1 ) and all upper dies ( 36 ) are attached to the press ram ( 2 ), a common one Internal high pressure source for all tool arrangement en ( 31 , 32 , 33 , 34 ) is provided and each tool arrangement ( 31 , 32 , 33 or 34 ) can be actuated separately with regard to the axial movability of its shaping plunger ( 37 ) and the supply of the pressure medium. 2. Device according to claim 1, characterized in that the shaping plunger ( 37 ) of the tool arrangements ( 31-34 ) are assigned to the press table ( 1 ) of the shaping press.