DE102009033135A1 - Method for producing profiled sealing rings - Google Patents

Abstract

Method for producing profile sealing rings, in particular in a C, V or U shape, in which a profile strand (24) of predeterminable cross-sectional shape is obtained from a band-shaped carrier part (2) by reshaping and using shaping rollers (14, 16, 20, 22) The forming process takes place in such a way that the profiled strand (24) assumes at least part of an arch or spiral shape after the forming.

Description

The Invention relates to a method for producing profiled sealing rings, especially in C, V or U form.

Profile sealing rings find widespread as part of seal arrangements Application for connection connections of exhaust gas pipes, for example, for connections of lines to catalysts or cylinder heads of internal combustion engines or other Hot gas components, how to use them regularly in power plant technology. Due to the occurring high exhaust gas temperatures, it is the respective profile sealing ring regularly around a metallic component with less Wall thickness, wherein the ring body usually a profiled cross-sectional shape, for example in the form of a C, U or V profile.

According to the document EP 2 020 541 A1 pointed out prior art, a ring is formed in the production of such profile gaskets from a metal strip, after the metal strip was cut to the circumference, then the strip ends are welded to form a closed ring and this then profiled by rollers.

outgoing From this state of the art, the invention has the task to provide a method which is a particular rational production allows.

According to the invention this task is solved by a method that has the characteristics of claim 1 in its entirety.

Accordingly, there is a significant feature of the invention is that a band-shaped carrier part is transformed by means of molding rolls such that not only a profile strand given cross-sectional shape, so with C, V or U-shaped Cross-section, is formed, but that the extruded profile after the Forming arcuately curved or spriralig. The process of profiling thus concludes the formation the curvature of the strand in the desired ring shape with, so that a separate bending process eliminates ringing. The inventive method allows therefore a particularly cost-effective production of profile sealing rings at high production speed.

Thereby, that the profile strand is already in arch form, can Length sections whose length corresponds to the circumference of each corresponds to forming profile ring, readily connected, in particular be welded.

The Method can be carried out with particular advantage so that the profile strand from the longitudinally moving Carrier part is formed in several forming stages, wherein the forming rollers forming the last forming stage to the facing Surfaces of the profile strand different friction and / or shape change to the arcuate or spiral curvature of emerging from this forming stage To create profile strings.

Preferably becomes the flat support part by means of conveyor rollers fed to the first forming stage, in which a first molding roll with convex raised shell part and an opposite second molding roll with concave deepened shell part the support part deformed to preformed profile strand.

Preferably the arrangement is such that at least one molding roll both Forming stages both in the working direction and across the working direction is adjustable. This can be already at the preformed Profilstrang in different wall areas of the profile form one realize different material thickness. So, for example in the region of the back of a formed C or U profile a larger wall thickness than at the side Legs are formed, which in the finished profile sealing ring too optimum strength and elasticity ratios leads.

Preferably is the exiting from the first forming stage preformed profile strand the last forming stage adjustable across the working direction Guiding rollers supplied.

Around the desired arcuate or spiral curvature to reach the strand emerging from the last forming step, may preferably in the last forming stage, which is a third molding roll having a convex raised shell portion and a fourth molding roll with concave recessed shell part, so proceed, that not only the final profile shape is obtained, but that by setting peripheral speeds and the forming pressure in the last forming stage and the arcuate or spiral curvature of the exiting profile strand is formed.

A particularly significant advantage of the method according to the invention is that it is equally suitable for the production of profile gaskets in which the profile opening is located on the outside of the ring, as well as for profile gaskets whose profile is opened into the interior of the ring. In this regard, the procedure according to the invention can be such that at least the fourth shaping roller and the setting of the peripheral speeds of at least one of the third and fourth forming rolls, the direction of curvature is selected to obtain, if desired, a tread strand having an inwardly or outwardly oriented profile with respect to the arch form.

below the invention is explained in detail with reference to the drawing. Show it:

1 a highly schematically simplified drawn representation of a device for carrying out an embodiment of the method according to the invention;

2 an aborted and highly schematically simplified drawn sectional view of the device of 1 , according to the section line as with II-II in 1 hinted, and

3 a highly schematically simplified top view of the device of 1 ,

As 1 and 3 show, becomes a carrier part 2 in the form of a flat steel band through feed rollers 4 through a first forming stage 6 and a second forming stage 8th led, whereby the carrier part 2 each by lateral guide rollers 10 and 12 is held in the middle. In the first forming stage 6 becomes the carrier part 2 by means of a first molding roll fourteen and a cooperating with it second molding roll 16 to a preformed profile strand 18 transformed from the in the second forming stage 8th by means of a third molding roller 20 and a cooperating fourth forming roll 22 the final profile of emerging from the device finished profile strand 24 is formed.

The leadership roles 10 and 12 are on straps 26 Position adjustable transversely to the feed direction. In the first forming stage 6 acts the first forming roll fourteen with convex raised shell part 28 on the supplied carrier part 2 in the middle, see 2 while in the 1 and 2 lower, second molding roll 16 with concave recessed casing part 30 the carrier part 2 deformed laterally upward to that from the first forming stage 6 emerging, preformed profile strand 18 to convey a cross-sectional shape in the manner of a flat, wide open C. While in the subsequent second forming stage 8th in the 1 and 2 overhead, third molding roll 20 a raised shell part 32 having, which the shell part 28 the first forming roll fourteen corresponds, is the concave recessed shell part 34 the fourth forming roll 22 opposite the concave recessed casing part 30 the second molding roll 16 designed differently. In the presently described embodiment, in which the finished profile strand 24 forms a relatively narrow C-profile is the shell part 34 the forming roll 22 in the form of a narrower and deeper recess, compared with the shell part 30 the forming roll 16 , designed. This will make the finished profile strand 24 conveys a profile form, as in 1 at 36 is indicated schematically.

For the process of pre-profiling in the first forming stage 6 is the second forming roll in the present example 16 adjustable in position, as with double arrow 38 indicated, in the direction of the upper mold roll fourteen to reduce the nip, as well as, according to the double arrow 40 , along the working direction. As with corresponding double arrows 38 and 40 both second forming stage 8th indicated, is the fourth molding roll in a corresponding manner 22 in the direction of the associated forming roller 20 and positionally adjustable along the working direction. In addition, the peripheral speeds of the forming rolls, at least the forming rolls 20 and 22 the second forming stage 8th , independently adjustable. By setting these parameters, during the forming process, in the second forming stage 8th on the material of the preformed profile strand 18 acted in such a way that the material stretch is different on the profiled reason with respect to the extension of the side parts of the profile. This leads to a curvature of the finished profile strand 24 so that this is the second forming stage 8th leaves in an arched shape, see 1 , When the finished strand 24 by a position adjustable guide roller 42 is guided to the side forms the profile strand 24 spirally rolled up loops 44 , please refer 3 , For the final ring shape of the profile sealing ring therefore need of the loops 44 only length sections that correspond to the circumference of the profile sealing ring to be cut to length and to be welded end to the formation of the finished profile sealing ring without a bending operation would be required on a straight profile strand.

In a particularly advantageous manner, the deformation in the second forming stage 8th take place such that the material of the profile strand 18 is stretched less on the profile ground than on the profile pages. This can be effected by the shape and dimensioning of the cooperating shell parts of the forming rolls 20 and 22 For example, by the recessed shell part 34 is narrowed in the outer region, on the profile sides a stronger friction during the rolling process is effective, so that the profile strand 24 in the outdoor area is more stretched than in the profile ground. As a result, the finished profile strand occurs 24 opposite to the 1 shown in solid line upward curvature with a downward curvature from the second forming stage 8th out, like in 1 is shown with a dashed line. As in 1 at 36 is indicated, so in both cases, the profile is open to different sides. The invention thus makes it possible to manufacture profiled sealing rings with a profile that is open in the desired direction in a simple manner len.

Depending on the shape of the convex raised shell parts of the forming rollers and the cooperating concave recessed shell parts of the backing roll, can be compared to the C-shape show other profile shapes realize, with profiled shapes are produced in which the side walls of the profile can be irregularly curved. Likewise, contouring can be embossed on the outer or inner sides. The manufacturing process can take place in a continuous manner by the carrier part 2 withdrawn from a supply as an endless metal strip and with the same working direction through the forming steps 6 . 8th is guided through. Alternatively, defined lengths of the carrier part 2 by means of a linear feed device in multiple back and forth through the forming stages 6 and 8th be moved to the finished profile strand 24 in several rolling steps, optionally with changed position adjustment of the forming rollers, in particular the rollers 16 and 22 to shape.

Preferably, it is also possible, the indicated profiled rings with only one pair of rollers to form rollers 20 . 22 to obtain. This is the carrier part 2 as a blank in the pendulum method, that is, by reciprocating the blank, brought by the corresponding pair of rollers in a preferably closed ring shape. The blank has at the beginning of the rolling process a finite length, which includes the required circumferential length of the ring. By the pendulum movement of the blank in the longitudinal direction of the strip, which undergoes an elongation during the forming process, the blank is rolled into the round shape. The required for this multiple pendulum operations are preferably carried out continuously and therefore successively in the manner of a multi-step process to the final production. Subsequently, the ring is removed from the forming device and brought into the end, for example, by a welding process in a closed annular shape.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 2020541 A1 [0003]

Claims (9)

Method for producing profiled sealing rings, in particular in C, V or U form, in which a strip-shaped carrier part ( 2 ) by forming and use of molding rolls ( fourteen . 16 . 20 . 22 ) a profile strand ( 24 ) is given prescribable cross-sectional shape, wherein the process of forming takes place in such a way that the profile strand ( 24 ) after forming takes at least part of a bow or spiral shape. A method according to claim 1, characterized in that longitudinal portions of the arcuate profile strand ( 24 ) Endseits connected to form the annular body of the profile sealing ring, in particular welded. Method according to claim 1 or 2, characterized in that the profiled strand ( 24 ) from the longitudinally moving support part ( 2 ) in several forming stages ( 6 . 8th ), wherein the last forming stage ( 8th ) forming forming rollers ( 20 . 22 ) on the facing surfaces of the profile strand cause different friction and / or shape change to the arcuate or spiral curvature of this from this forming stage ( 8th ) emerging profile strand ( 24 ) to create. Method according to claim 3, characterized in that the flat carrier part ( 2 ) by means of conveyor rollers ( 4 ) of the first forming stage ( 6 ) is supplied, in which a first molding roll ( fourteen ) with a convexly raised casing part ( 28 ) and an opposing second molding roll ( 16 ) with a concave recessed casing part ( 30 ) the carrier part ( 2 ) to the preformed profile strand ( 18 ) deformed. Method according to claim 4, characterized in that at least one molding roll ( fourteen . 16 . 20 . 22 ) of both forming stages ( 6 . 8th ) in the working direction and transversely to the working direction for changing the roll gap is adjustable. A method according to claim 5, characterized in that the from the first forming stage ( 6 ) exiting preformed profile strand ( 18 ) of the last forming stage ( 8th ) via transverse to the direction adjustable guide rollers ( 12 ) is supplied. A method according to claim 6, characterized in that in the last forming stage ( 8th ) with a third, a convex raised lateral surface ( 32 ) having molding roll ( 20 ) and fourth forming roll ( 22 ) with a concave recessed lateral surface ( 34 ) the final profile shape and by adjustment of peripheral speeds and the forming pressure in the last forming stage ( 8th ) the curvature of the exiting profile strand ( 24 ) is formed. Method according to claim 7, characterized in that at least the fourth shaping roll (16) is formed by the shaping and the positional adjustment ( 22 ) and the setting of the peripheral speeds of at least one of third ( 20 ) and fourth forming roll ( 22 ) the direction of the curvature is chosen to be as desired a profile strand ( 24 ) with inside or outside, based on the arch shape, to obtain open profile. A method according to claim 1, characterized in that from the band-shaped carrier part ( 2 ) by forming using a pair of forming rollers ( 20 . 22 ) in the manner of a pendulum movement by continuous reciprocation of the support member ( 2 ) along the pair of forming rollers ( 20 . 22 ) the profiled arch form arises.

Images