WO2008046595A1

WO2008046595A1 - Method and tool for producing exhaust-gas conducting devices

Info

Publication number: WO2008046595A1
Application number: PCT/EP2007/008989
Authority: WO
Inventors: Peter Kroner; Manfred Stiglmair
Original assignee: Emcon Technologies Germany (Augsburg) Gmbh
Priority date: 2006-10-18
Filing date: 2007-10-17
Publication date: 2008-04-24
Also published as: DE102006049238A1

Abstract

The invention relates to a method and to a tool for producing exhaust-gas conducting devices, comprising a housing provided with a cover (14) and an insert that is fixed in said housing, working with inwardly and outwardly displaceable pressure shoes (46). At least two different sets of moulding parts (64) for the pressure shoes (46) are provided enabling various method steps to be carried out. Each set of moulding parts (64; 64';64') is associated with one other of the following steps that is carried out with the respective set: winding the cover (14), calibrating the cover (14), pushing together the cover shells (114; 214) and measuring the pressure when the pressure shoes (46; 46'; 46'; 46'') are displaced inwardly against the insert. According to the steps that are carried out, one or more pressure shoes (46) can be deactivated and/or controlled individually or in groups.

Description

Method and a tool for producing exhaust gas

devices

The invention relates to a method for producing exhaust gas-conducting devices, in particular exhaust gas-cleaning devices such as particle filters and catalysts, but also mufflers. These devices are provided with a housing with a jacket, preferably a cylindrical metal jacket, and an insert clamped in the housing, usually a so-called monolith together with a bearing mat surrounding it. The insert is radially clamped in the jacket and thus held.

There are various methods in the art for how to achieve this clamping. One of the most common methods is the so-called winding, in which a sheet is wound around the insert. In the desired end position of the sheet edge is welded in the overlapping region of the sheet metal edges. The winding itself is done by machine with the aid of a chain-like structure which engages the shell and initially pushes it away from the edges and then increasingly towards the edges, wrapping it around the insert.

Another method of winding is to place a very highly preformed sheath around the insert and then place the unit in a receptacle adapted to the later form of the device. In the area of the edges which are not yet connected, pressure jaws are then fed toward one another, which push the edges one above the other into the end position, in which the overlapping edges are then welded together.

Another method for producing the device is the so-called calibration or shrinking. Here, the insert is inserted into an oversized, circumferentially already closed tube, and the resulting unit is then placed in a tool which is provided with numerous radially inwardly movable pressure jaws. The jaws are either provided on their inner side with a cylindrical segment-shaped inner surface which acts on the jacket, or it is attached to the jaws still correspondingly shaped moldings. When the pressure jaws are moved radially inwards, they plastically deform the shell so that the insert in the jacket is deformed. is stuck. In this embodiment, the tool is several meters long, because the relatively high radial force is achieved via a wedge effect of mutually movable parts. A linearly displaceable carriage moves several wedge-shaped parts, which add up to a funnel, in the longitudinal direction and displaces the pressure jaws radially inwards slowly but very precisely.

A third, commonly used method is clamping over so-called shell shells. The jacket is preferably divided into two half-shells, wherein the insert is positioned in the lower shell and the upper shell is then moved against the lower shell. When the shell halves are then overlapped, they are welded together at their contacting edges. Since the shells have an undersize with respect to the depositor, takes place when moving the shells, a clamping of the insert. The corresponding tool is in the present case only a substantially vertically movable press with a lower receptacle for the lower shell and an upper mold part for receiving the upper shell.

Which of the above-described methods are used depends above all on the construction of the device to be manufactured.

The invention relates to a method which provides a significantly lower cost for the production of the device, and an extremely inexpensive to produce tool with which an exhaust gas-conducting device can be produced.

The inventive method is, as already explained, aligned for the production of exhaust gas-conducting devices having a housing with a jacket and an insert clamped in the housing, and operates with a tool having inwardly and outwardly movable jaws.

The invention provides: a) at least two different sets of moldings are provided, with which different process steps are performed, wherein the inner sides of the mold parts of at least one of the sets together define the geometry of the shell, each set of moldings another of the following steps associated with the respective sentence, - winding the jacket;

- calibrating the jacket;

- pushing together shell shells,

- Pressure measurement with inward movement of the pressure jaws against the inserter; b) the shaped parts of a selected set are fastened to at least some of the pressure jaws, c) depending on the step to be carried out under a), one or more pressure jaws can be deactivated and / or individually or in groups differently borrowed, d) the depositor and, at least during winding, calibrating and collapsing the unit of insert and sheath, is / are inserted into the tool and e) at least one jaw with its molded part is inwardly against the insert and, at least during winding, calibration and pushing pushed against the mantle, wherein another pressure jaw with its molding application of a counter force.

The invention is based on the idea that by means of the same tool different so-called Canning methods, ie methods for embedding the insert in the jacket, can be performed. However, in its preferred embodiment, the invention not only provides for a universal canning method, but also allows a pressure measurement of the insert to be made with this tool by compressing the insert. This serves to determine the individual compliance for each depositor. This flexibility results in particular from the bearing mat which, after it has been compressed, undergoes a certain settling and aging process (relaxation) so that over a period of years the pressure released to the inner substrate decreases. Since the deformation resistance of bearing mat is different from bearing mat, as well as their dimensions and the dimensions of the inner insert, it has been proposed to first individually individually plastically deform each insert to get to know its properties and to calculate a certain nominal deformation, then pressure and / or path-controlled by means of the tool is achieved. The printing - A -

Measurement can be done before canning in the same tool, without subsequent conversion.

The present invention provides in its basic form according to claim 1, that at least two of the processes winding, calibrating, pushing together and pressure measurement done with a tool, but it is preferred more than two of these individual methods. The invention provides different sets of moldings, which are then attached to associated jaws. Since the pressure jaws can be deactivated individually or in groups and / or can be controlled differently individually or in groups, processes that have hitherto been carried out in completely different tools can now be carried out in one method and one tool.

In doing so, e.g. The following extremes are covered: When canning according to the shell principle, preferably only one of the numerous pressure jaws is activated. On a lower, deactivated jaw an oversized, the lower half-shell receiving molding is attached. The opposite pressure bar is the only activated, i. movable jaw. At her a corresponding receiving the upper shell molding is attached. The remaining, lateral pressure jaws are preferably also deactivated. They preferably carry no moldings. By this individual deactivability is excluded that the otherwise radially inwardly moved pressure jaws butt against the two single mold parts or the jacket.

When calibrating, however, usually all the jaws are provided with moldings, and all the jaws are also moved, so that a very uniform pressure can be exerted on the closed tube from all sides. The same applies to the pressure measurement.

For winding usually not as many jaws must be moved as when calibrating, so that also some jaws without molding can be equipped.

It would also be possible in this context to use the different control so that the jaw movements have different time-path curves during activation. For example, the pressure jaws could cover the greatest distance in the area of the two edges. against some other jaws only stay fixed or hardly moved. A staggered movement of the pressure jaws to each other is possible.

As just explained, it is preferred that when pushing together shell shells and / or during winding of the shell at least one pressure jaws is disabled and that when pushing together shell shells even only a pressure jaws is activated.

For some applications, examples of which have already been given beforehand, may be favorable for providing at least one of the non-activated pressure jaws with a molded part which acts as a holder or as an abutment.

The method according to the invention provides according to a preferred embodiment, that the activated pressure jaws are moved pressure and / or position controlled.

In addition or in addition, an incremental control of the pressure jaws is advantageous, i. the controller knows the position of the jaws.

According to the preferred embodiment, all the jaws can be moved by means of a common drive, but as an alternative, individual drives could also be assigned to each jaw or at least groups of jaws.

The invention also relates to a method as described above

Tool for producing exhaust gas-carrying devices, which is provided in particular for carrying out the method according to the invention. The devices to be manufactured have a jacket and an insert clamped in the housing (preferably a substrate with a bearing mat). The tool comprises a working space for receiving the insert and the jacket surrounding the insert, a plurality of inwardly and outwardly movable pressure jaws for deforming the insert and / or the shell and terminals of the insert in the shell and attached to the inner ends of the pressure jaws, replaceable moldings, the come to the depositor or the jacket to the plant and determined when investing in the shell of its desired shape. The tool is characterized in that pressure jaws can be deactivated and / or controlled individually or in groups. By virtue of the fact that the pressure jaws can be individually deactivated and / or controlled individually or deactivated in groups and / or individually controlled, different methods can be carried out, namely at least two of the four methods of winding the jacket, calibrating the jacket, sheathing of jacket shells and Pressure measurement on inward movement of the jaws against the insert.

The tool has a mechanical or electrical, alternatively a hydraulic or pneumatic control for the movement of the jaws, which makes these individually switchable or controllable. The control can also be, for example, an individual control cam in a power transmission path, via which force is applied to the pressure jaws.

The invention provides in the preferred embodiment a kind of modular system by providing several different sets of mold parts, each used for different movements of the tool parts, i. with which different procedures can be carried out. These sets of moldings are assigned to different movements of the tool. That is, the kit provides for different, predetermined processes associated sets of moldings and associated activated or deactivated, provided with or without moldings pressure jaws or differently controlled pressure jaws before.

If oversized moldings are used, it would of course be conceivable to perform just adjacent pressure jaws easily removable, so that they are temporarily removed for a particular process.

The pressure jaws are aligned in particular radially displaceable.

The orientation of the jaws with respect to their angle and thus the position of the insert or coat can be adjusted individually when the jaws are made angularly adjustable. The jaws and their directions of movement are adjustable in the range from the vertical to the tangent to the workpiece.

A compact embodiment of the tool according to the invention can be achieved if the working space in which the insert is inserted, including coat, surrounded by a housing. This housing is used for storage and power.

The compactness of the tool is also achieved by a surrounding the working space, rotatable to move the pressure jaws drive part. This oversized, responsible for many or even all jaw movements drive part allows it to exert a force on the activated cheeks very evenly and in a small footprint evenly and move them evenly. Particularly in the axial direction, the tool according to the invention builds extremely short.

Preferably, in this context, the drive member is provided with a translation portion to which the pressure jaws are coupled and over which the rotational movement is converted into an inward movement of the pressure jaws. This translation section has, for example, a type of control cam, via which the force is directed in the direction of the pressure jaw and which has a varying distance from the working space. It can be a kind of slotted guide or, according to the preferred embodiment, realize a kind of wedge principle. On the relatively large circumference of the drive part can be realized for each pressure jaws a relatively large cam length, without this being at the expense of the axial length of the tool or the space increases excessively. In addition, it would of course also conceivable to provide a kind of linkage or gear as a translation section.

In the solution with the cam to move the pressure jaws, which are preferably mounted linearly movable, along the control curve inwardly when the workpiece is to be compressed. The long cam allows a very fine control of the travel.

The translation section may preferably be designed as a replaceable and / or adjustable part. It can be for each pressure jaws a single, interchangeable and individual part as translation section or make a replaceable part for several jaws or adjustable parts. When retrofitting the tool for another method or for a different sized workpiece only the individual translation sections and the mold parts must be made, so that the conversion itself cost is extremely low. The rotatable drive member surrounding the working space is also very important for easy accessibility when retrofitting the tool to perform another method. Namely, all the jaws together with the molded parts and the drive part including translation sections are directly accessible on the front side in this embodiment.

According to the preferred embodiment, the modular tool according to the invention provides that different sets of moldings are provided and associated, interchangeable and / or adjustable translation sections, the latter also being mechanically e.g. can be fixedly attached to the drive part at one end.

Further features and advantages of the invention will become apparent from the following description and from the following drawings, to which reference is made. In the drawings show:

FIG. 1 shows a longitudinal sectional view through an apparatus according to the invention in the form of an exhaust gas catalytic converter or diesel particle filter,

FIG. 2 shows a front view, partly in section, of a tool according to the invention for carrying out the method according to the invention,

- Figure 3 is a sectional view through the tool of Figure 2 taken along the line IH-III ₁

FIG. 4 shows a schematic front view through the tool during winding together with the device located therein,

- Figure 5 is a schematic front view of the tool according to the invention when connecting shell shells and

- Figure 6 is a schematic view of the tool according to the invention during pressure measurement of the insert.

FIG. 1 shows an exhaust-gas-conducting device accommodated in a motor vehicle in the form of a vehicle exhaust gas purification device, which is either an exhaust gas catalytic converter or a diesel particulate filter or a combination of both. , At the heart of the device is an elongate, cylindrical substrate 10, which consists for example of a ceramic substrate or a type of wound corrugated cardboard or another catalytic carrier or filter material with or without coating. The substrate 10 may have a circular cylindrical cross section or a non-circular cross section. Only for the sake of simplicity, a circular cylindrical cross section is shown in the figures. The substrate 10 is surrounded by a bearing mat 12, which acts as an elastic compensation element between the substrate and an outer housing, hereinafter referred to as jacket 14. The jacket 14 is made very thin-walled and in particular made of sheet metal. Upstream and downstream of the jacket 14, an inflow funnel 16 and a discharge funnel 18 are connected.

The substrate 10 forms, together with the bearing mat 12, a prefabricated unit, which is referred to below as a depositor. -

In operation, exhaust gas flows via the inflow funnel 16 into the substrate 10 at the front end and leaves with fewer pollutants finally the substrate 10 at the opposite end face in order to leave the cleaning device via the outlet funnel 18.

The device is manufactured by means of a tool, which is shown in FIGS. 2 and 3. The tool comprises a base 20 and a plate-shaped, vertical support 22 having a central opening 24 (see FIG. 3). The tool is largely symmetrically aligned with a central axis M, which also forms the central axis of the opening 24. The inside of the housing 26 serves as a sliding bearing surface for a rotatable about the central axis M drive member 28. The drive member 28 is made of several pieces and includes a collar 30, the Outside on the inside of the housing 26 slides, and on the inside of the adjusting ring 30 releasably secured so-called. Translation sections 32. The translation sections 32 are circular segments, the inner sides each have a continuously from one to the other circumferential end progressively closer to the central axis M running cam 34. The translation portions 32 are fixed, for example via numerous screws 36 on the adjusting ring 30. For axially fixing the position of the drive Part 28 serves on the one hand the carrier 22 and on the other hand a housing 26 attached to the disc 38 (see Fig. 3).

A bearing arm 40 for a drive 42 in the form of a hydraulic cylinder is connected to the adjusting ring 30. About acting as a rotary drive drive 42, the drive member 28 can be rotated clockwise and counterclockwise in the housing 26. Alternatively, of course, a direct drive on the adjusting ring 30 would be advantageous, in particular if the position of the adjusting ring 30 is known and is incrementally adjusted. On the illustrated front of the carrier 22 a plurality of evenly distributed on the circumference, spaced apart Druckbak- keneinheiten 44 are attached. Each jaw unit 44 includes a Druckbak- ken 46 with a linearly movable plunger 48 and a pressure roller 50 which is attached to the outer end of the plunger 48 and rests on the associated control cam 34. Each plunger 48 is stably supported in a guide bushing 52. From a plunger 48 surrounding the return spring 54 which engages on the one hand on the plunger 48 via an adjusting nut 56 and on the other hand on the guide bushing 52, each plunger 48 is subjected to a force radially outward. The return spring 54 thus ensures that the pressure roller 50 rests in any position on the control cam 34. Each jaw unit 44 is associated with a bearing block 58 which is connected to the central axis M through a pivot bearing 60 with the carrier 22 and via screws 62 seated in slots with the carrier 22. Since the screws 62 extend in arcuate oblong holes, each pressure jaw unit 44 can be aligned at an angle to the central axis M.

As can be seen in FIG. 2, each pressure jaw unit 44 is assigned its own translation section 32 with its own control curve 34. The translation portions 32 are arranged sequentially in the circumferential direction.

It would also be conceivable, however, that the pressure jaw units 44 or only their guide bushes 52 are partially axially offset from each other, so that would result in two axially successive levels of translation sections and cams 32 and 34, respectively. This may have the advantage that the individual control cams 34 can be made substantially longer than in the illustrated embodiment, in which due to the eight pressure jaw units 44 each cam 34 can only assume a circumferential travel angle of 45 °.

On the radial inner side, a so-called shaped part 64, also called a shaping jaw, is fastened on each plunger 48 so as to be easily interchangeable via a screw connection (see FIG. 3).

For clarity, not all parts are shown in Figure 2 for each jaw unit 44, e.g. is only a single jaw unit (the one at 3 o'clock) with a clearly visible in its outlines plunger 48 and a return spring 54 shown.

Finally, FIG. 2 also shows a rotation stop 66, which may optionally be fastened in different directions in the circumferential direction, which is attached to the housing 26 and cooperates with a stop 68 on the bearing arm 40.

The molded parts 64 have a radial inner side 70, which together define a working space 72 and, if they have moved maximally radially inwards, define the later outer geometry of the jacket 14 of the housing during canning.

In Figure 2, the tool is configured so that all the jaw units 44 are active, i.e., on the one hand, all the jaw units are provided with a molding 64 and, on the other hand, there is force transmission between each ram 48 and the drive 42.

In the position shown in Figure 2, all the plunger 48 are moved radially outward. In this position, a prefabricated unit of a jacket 14 and an insert inserted therein with substrate 10 and bearing mat 12 from a front end (front 100) in the working space 72 fully automatically via a conveyor system 102 (eg gripper) inserted (see Figure 3) , The conveying direction is shown by the arrow F.

This prefabricated unit (also referred to below as a workpiece) is positioned between the mold parts 64. Subsequently, the drive 42 is actuated, which leads to a rotation of the adjusting ring 30 and the control cams 34. About the translation portions 32, the rotational movement in numerous individual linear movements, namely that of the pressure jaws 46 is converted when the pressure roll 50 along the cams 34 along and drive the plunger 48 inward due to the inward-facing path. The molded parts 64 deform the shell 14 very evenly around the circumference plastically, ie they calibrate the jacket 14 and cause the insert is sufficiently clamped radially in the jacket 14.

The movement can take place up to the contact of the stops 66, 68 or pressure and / or position-controlled, wherein an incremental control can also be provided. The elaborate controls allow an exact clamping of the insert in narrow, predetermined limits.

The pressure jaws 46 are then moved outward by reversing the drive 42, and the device produced is fully automatic in the conveying direction F, which consequently does not change between supply and removal of the workpiece, through the opening 24 on the rear side 104 of the tool opposite the front side transported out by means of the conveyor system 102 (see workpiece with broken lines in Figure 3). The tool thus operates on the flow principle. Simultaneously with the removal of the workpiece produced already the supply of the still to be calibrated workpiece in the tool, so that there are low cycle times.

The tool shown in Figure 2 is a universal tool that is also used for other processes in the manufacture of the exhaust gas delivery device, for example, when winding the jacket 14 around the insert.

In the embodiment according to FIG. 4, the tool has been converted for winding a jacket 14. For this purpose, an individually adapted set of molded parts 64 'is provided, which does not correspond to the first set of molded parts 64 shown in FIG. In addition, not all the jaws 46 'are activated. The lower jaw (at 6 o'clock) is provided with an oversized, half-shell molded part 64 ', its associated control curve 34 is either located on a circular ring, ie there is no wedging action and no displacement of the plunger 48, or the associated plunger 48 is on another way axially fixed immovable, so that the molding 64 "can act as an abutment and absorbs forces. The right and left lower (at 4.30 and 7.30 clock) located cheek plates 44, which are symbolized here only with their center lines 80 and 82 are disabled. Either the jaw units 44 are completely removed to accommodate the oversized mold 64, or merely their moldings are not mounted so that only the plungers are present. Another possibility for deactivation consists, as described in connection with the located at 6 o'clock, lower jaw unit, according to the execution of a circular segment-shaped cam 34. Finally, a further possibility of deactivation of a jaw 46 and the omission of the associated translation section 32, ie the expansion of the translation section 32 previously used for other purposes, which was still provided for example in the assembly of Figure 2.

The translation portions 32 may also be adjustably mounted on the adjusting ring 30, so that for other workpieces or methods to be used, the translation portions 32 need only be adjusted, as indicated by the pivotable translation portion 32 a.

The horizontally left and right extending jaw units 44 are either disabled as the lower jaw unit and are positionally stable and thus acting as an abutment pressure jaws, or they are radially inwardly displaceable, i. activated.

The top right and top left pressure jaw units 44 are pivoted in the direction of the horizontal axis and that by the angle α. This is very easy in view of the pivot bearing 60. Simplified symbolized are their individually tailored to them translation sections 32 'shown. The control cams 34 'together with the translation sections 32' are slightly shifted in their position compared with the associated position in Figure 2, to adapt them to the new angular orientation of the pivoted upper jaw units 44.

The upper jaw assembly at 84 may either be omitted, disabled or also activated, it is omitted for simplicity and is not critical to the principal statement. In the assembly of the tool of Figure 4, in which is wound, an individual set of mold parts 64 'associated with an individual set of translation sections 32', and there is finally also another assignment, namely which pressure jaw units disabled, in which way disabled and when are actuated. About the location and thickness of the translation sections can be set easily whether individual jaws are adjusted sooner or later or more than other jaws.

The winding method based on the illustrated tool will be explained below.

It should be emphasized that in previous winding tools only circular cylindrical, oval or so-called. Triovale (triangles with strongly rounded corners and convex side surfaces) workpiece contours are made by winding. However, due to the winding adjustments of the pressure jaws, the described tool has no such geometric application limits.

As in the previous embodiment, the unit of jacket 14 and insert is retracted from the front 100 in the conveying direction F fully automatically in the working space 72. The jacket 14 is already somewhat preformed and adapted to the circular shape, it is about the final closing of the shell 14 and the achievement of the clamping force. The workpiece is located in the lower mold part 64 ", optionally held laterally by positionally stable, deactivated mold parts 64 'at 3 o'clock and 9 o'clock, Alternatively, these mold parts 64' can also be driven slightly radially inward The two upper pressure jaws 46 'are maximally outward hazards.

The drive 42 is moved. Optionally, the pressure jaws located at 3 o'clock and 9 o'clock could now first be moved radially inwards before the upper pressure jaws 46 'to be traversed by the larger displacement travel inwards and the free edges 86, 88 of the casing 14 continue to slide over one another. The arrows on the upper pressure jaws 46 'show the linear direction of movement of these pressure jaws 46'. In the end position, the edges 86, 88 are spot-welded.

The tool can also be further converted to according to Figure 5 shell shells 114, 214, which are welded to form a shell, each other to move, so that the insert is clamped in the resulting coat. For this purpose, only one lower mold part 64 "and one upper mold part 64" are necessary, all six lateral pressure jaw units 44 are deactivated. Also, the lower jaw 46 "is disabled, but in this case stable, so that they can serve as an abutment.

However, the upper pressure jaw 46 "with its half-shell-like molded part 64" is active, and is also assigned an individual translation section 32 ".First, the lower jacket shell 114 together with the insert is inserted into the lower molded part 64". The upper jacket shell 214, spaced from the lower shell shell 114, placed on the insert or attached to the movable mold part 64.

As with the other embodiments, the pressure jaw 46 "is subsequently moved downwards until the outwardly bent flanges 116 of the shell shells touch each other. The sheath shells 114, 214 are now welded together.

As in the other embodiments, the finished workpiece is moved out of the workpiece via the opening 24 while the conveying direction F remains the same, and at the same time a new workpiece is fed to the tool.

Incidentally, this procedure also applies to the winding and the method now described, namely the pressure measurement of the insert.

This pressure measurement can be carried out with more or less activated pressure jaws 46. The pressure measurement is preferably carried out for each depositor prior to canning and more preferably in the tool configuration in which the canning is subsequently performed. In this use of the tool, it serves as a measuring device, via which the pressure is applied, which simulates the later pressure during Canning or is extrapolated on the latter at this later pressure.

This measuring method, which can be carried out with the tool according to the invention, will be explained below with reference to FIG. Of course, individual moldings 64 and translation sections can also be used for this process

32 are provided, as well as an individual assignment of activated or deactivated pressure jaws 46th In this measuring method, the tool serves as a measuring device, in which the resilience of the to be installed, preferably even each insert to be installed is determined.

For this purpose, the insert is inserted in the conveying direction F in the tool and by at least one pressure jaw 46 '", preferably more pressure jaws 46"', radially inwardly increasingly loaded. The pressure jaws 46 '' are coupled to load cells 120 which constantly sense the applied force and which can either be permanently provided or installed between force transmitting parts for this single operation step specific pressure.

The force applied to the inserter is steadily increased until a predetermined pressure is reached. During the process of the pressure jaws 46 '", the travel path is picked up in a punctiform or continuous manner parallel to the pressure.

From the contacting of the bearing mat 12 up to the position of the pressure jaws 46 '"when the predetermined pressure is reached, a travel path X is determined, for example. The predetermined pressure may be the desired pressure corresponding to the target deformation, with which the insert should later be clamped in the outer housing 14 ,

However, it is preferable to terminate the measuring method significantly below the setpoint pressure and to move the pressure jaws 46 '' up to the predetermined, lower predetermined pressure in order to extrapolate over the previously determined measuring parameters to the later necessary travel to achieve the pressure the tool is coupled to a corresponding controller 126, in which the determined measurement data are stored, so that the controller 126 also serves as a memory.

Finally, the pressure jaws 46 '"drove apart again.

The illustrated tool serves four individual process steps, of which three are canning methods and one measuring method. In the basic embodiment, the tool should preferably be designed in such a way that at least two of the can-ning methods can be carried out via the individually activatable or controllable pressure jaws 46 connected to the associated individual shaped parts 64.

Instead of the common drive, it would also be possible to individually control individual pressure jaws or to individually control groups of pressure jaws. For example, each jaw 46 could be provided with its own drive, e.g. a separate electric drive or hydraulic / pneumatic drive 42 ', as is indicated in Figure 2 by way of example for two pressure jaws.

In principle, it is also possible to increase the pressure first by means of corresponding control cams and then to reduce it again.

Claims

claims

1. A method for producing exhaust gas-conducting devices, in particular exhaust-gas-cleaning devices, which have a housing with a jacket (14) and an insert clamped in the housing, by means of an inwardly and outwardly movable pressure jaws (46; 46 '; 46 "; 46'") a) at least two different sets of mold parts (64, 64 ', 64 ") are provided, with which different process steps are performed, wherein the inner sides (70) of the molded parts (64, 64', 64") at least one the sets jointly define the geometry of the shell (14), each set of molded parts (64; 64 '; 64 ") being associated with another of the following steps performed with the respective set,

- winding the jacket (14);

- calibrating the jacket (14); - pushing together shell shells (1 14, 214),

- Pressure measurement with inward movement of the pressure jaws (46, 46 ', 46 ", 46'") against the insert; b) attaching the mold parts (64; 64 '; 64 ") of a selected set to at least some of the pressure jaws (46; 46'; 46"; 46 '"); c) one or more depending on the step to be performed under a)

Jaws (46; 46 '; 46 ";46'") can be deactivated and / or individually controlled individually or in groups, d) the insert and, at least during winding, calibrating and sliding, the unit consisting of insert and sheath (14) the tool is / are inserted and e) at least one pressure jaw is moved with its molded part inwards against the insert and, at least during winding, calibrating and pushing against the jacket (14), wherein another pressure jaw (46; 46 '; 46 "; 46 '") with its molded part applies a counterforce.

2. The method according to claim 1, characterized in that when pushing together shell shells (114; 214) and / or during winding of the shell (14) at least one pressure jaw (46; 46 "; 46"; 46 '") is deactivated.

3. The method according to any one of the preceding claims, characterized in that at least one of the non-activated pressure jaws (46; 46 ', 46 ";

46 '") is provided with a molded part.

4. The method according to any one of the preceding claims, characterized in that the activated pressure jaws (46; 46 ', 46 ", 46'") are moved pressure and / or position-controlled.

5. The method according to any one of the preceding claims, characterized in that the activated pressure jaws (46, 46 ', 46 ", 46"') are moved incrementally controlled.

6. The method according to any one of the preceding claims, characterized in that all the pressure jaws (46; 46 ', 46 "; 46'") by means of a common drive (42) are movable.

7. The method according to any one of claims 1 to 5, characterized in that the pressure jaws (46; 46 '; 46 "; 46'") by means of individually assigned drives (42 ') are movable.

8. A tool for producing exhaust gas-conducting devices, in particular for carrying out the method according to one of the preceding claims, wherein the devices comprise a housing with a jacket (14) and an insert clamped in the housing, with a working space (72) for receiving the Inserter and the sheath surrounding the insert (14), a plurality of inwardly and outwardly movable jaws (46; 46 '; 46 ";46"') for deforming the insert and / or the sheath (14) and clamping the insert in the sheath ( 14) and interchangeable moldings (64; 64 '; 64 ") attached to inner ends of the pressure jaws (46; 46';46"; 46 '") which abut the insert or shell (14) and engage to the shell (14) determined the desired shape, characterized in that

Pressure jaws (46, 46 ', 46 ", 46"') can be deactivated and / or controlled individually or in groups.

9. A tool according to claim 8, characterized in that at least a first and a second set of molded parts (64, 64 ', 64 ") are provided for attachment to the pressure jaws (46, 46', 46", 46 "').

10. Tool according to claim 8 or 9, characterized in that the pressure jaws (46; 46 '; 46 ", 46"') are radially aligned.

11. Tool according to one of claims 9 to 10, characterized in that the pressure jaws (46; 46 '; 46 "; 46'") are adjustable in their angular orientation.

12. Tool according to one of claims 9 to 11, characterized by a working space (72) surrounding the housing (26).

13. Tool according to one of claims 9 to 12, characterized by a working space (72) surrounding, for moving the pressure jaws (46, 46 ';

46 ", 46" ') rotatable drive part (28).

14. Tool according to claim 13, characterized in that the drive part (28) with a translation portion (32) is provided, with which the pressure jaws (46; 46 '; 46 "; 46'") are coupled and on the rotational movement in an inward movement of the jaws (46, 46 ', 46 ", 46'") is converted.

15. Tool according to claim 14, characterized in that the translation section has a control cam (34) whose distance to the working space (72) varies.

16. Tool according to claim 1.5, characterized in that the pressure jaws (46; 46 ', 46 "; 46'") along the control cam (34) on rotation of the drive member (28) inwardly migrate.

17. Tool according to one of claims 15 and 16, characterized in that the translation portion (32) is an exchangeable or adjustable part.

18. Tool according to one of claims 15 to 17, characterized in that different sets of molded parts (64, 64 ', 64 ") are provided, which have their own, associated with them translation sections.

19. Tool according to claim 18, characterized in that each set of molded parts (64, 64 ', 64 ") is assigned its own, interchangeable translation section.

20. Tool according to one of claims 14 to 19, characterized in that a plurality of, each a pressure jaws (46; 46 ', 46 ", 46'") associated translation sections are provided.

21. Tool according to one of claims 9 to 20, characterized in that the pressure jaws (46; 46 '; 46 ", 46'") are mounted linearly movable.