MXPA96005775A - Arrangement for joining an elementoid base with another component of action by welding - Google Patents

Abstract

The present invention relates to a method of joining a first thin-walled steel part to a second thin-walled steel part, the method comprising the steps of: juxtaposing a metal plate with the first part; securing the plate to the first part; part by welding or welding by laser beam, juxtapose the second part with the plate, and weld by fusion the second part to the pla

Description

i ARRANGEMENT FOR BINDING A BASE ELEMENT WITH ANOTHER STEEL COMPONENT The invention relates to an arrangement for joining by welding a base element in-form of a part of a flat surface metal sheet or laminate, or tubular, thin-walled, in particular made of stainless steel, with another component of steel, in particular of stainless steel, for example a bolt or a piece of sheet or thin-walled metal sheet. l? According to the current state of the art it is known to weld other components, such as, for example, welding bolts, on sheet or metal sheet parts, tubular or extended, of relatively thick wall, especially of stainless steel. It is known to splice Ib steel tubes, especially of stainless steel, proceeding in a way that the tubes are introduced one inside the other, and welded in the region of the joint. This type of welding is very easy to carry out when it comes to parts or tubes of sheet metal or relatively thick wall metal plate, which also ensures that the weld has a durability that corresponds to that of life useful of the individual components. Especially in the case of tubes, it must be borne in mind that, as far as durability is concerned, these tubes, and especially their joining sites, are subject to vibrations in the uses reserved for the purposes of the . Provided that in order to economize on costs and weight, thin-walled sheet steel or sheet steel parts and tubes are used, in particular stainless steel, whose wall thickness is, for example, within the range of one millimeter or less, a direct welding of such parts or tubes of sheet or sheet metal with other steel components, especially of 1Ü stainless steel, then, if not impossible, very expensive to carry out, because due to the welding process comes a fatigue of the material in the region of the weld and, in particular, notch effects are also present, which leads to breaks Premature weights of the material next to the joint site by welding, especially when the components are subjected to vibrations. From the state of progress of the technique mentioned at the beginning, the invention has as its object the The task of creating an appropriate arrangement for this kind of materials, which allows to weld thin-walled parts of sheet or sheet metal, with other sheet or sheet metal components, so that the solder will resist during the lifespan of ls parts. In order to solve this task, it is proposed to provide in the region of the joint, a metal support element with a flat surface, which is fixed to the base element by means of beam welding or brazing, and b to weld the other component on the support element. By means of the position of the additional support element, a support is secured in that area in which the welding is carried out by lightning or strong welding. For this, strong welding is the one that is specifically preferred, since with brazing in particular, it is with which no notching effects or other influences on the materials in the region of the union occur. But the support element is not cynically supported by the corresponding area of Ib laser welding or strong welding, but by the support element is provided an additional element, on which the other component of steel or especially stainless steel, in the usual way can be welded. For this it was found that the support element can be 2u also configured as a thin wall part of sheet or sheet metal, steel or stainless steel. In spite of this thin wall configuration, it is possible to directly weld other steel components on this support element, without the danger of breakage for the base element in the form of a sheet metal part or a flat sheet metal, profiled or thin-walled tubular. A preferred per- ception is that the support element to be fixed on the base element is a plate, which is welded by laser beam or by brazing through the edge of the periphery of the base element, and in which the other component is a bolt for welding. An alternative to the above is that the supporting element on the base element is an annular element, which is welded by welding or by welding on the base element, surrounding a punching made in the base element, and in that the other component I was a tube that was coaxially mounted on the ani fi ar element. A particularly preferred feature is that, on the base element formed as a tube - preferably in one of its end regions - it is Or as a support element, welded by means of beam or brazing, a seat ring that surrounds the tube surrounding it, and in which a tubular element of the other component is sealed on the seat ring, which is attached to the seat ring. Furthermore, it is particularly preferred to provide that the base element consists of several tubes which are assembled together, the ends of which are assembled in each case are surrounded by an annular element which conforms to its shape, in quality. of supporting element, for which each annular element is welded by laser beam or brazing with the corresponding end of the tube, and in which the other component consists of a tubular piece of junction that is l? it can penetrate over the assembled ends, and weld with the region of the periphery of the annular elements. A method for joining a base element in the form of a thin-walled sheet or sheet metal part with another component, for welding Ib form an array of con + o m? with one of claims I to 5, characterized in that in the region provided for the welding connection, on the thin-walled metal sheet or sheet part, a metal support element is provided, which is fixed 2? by laser beam welding or brazing, and in which the other component is placed on the support element. For this purpose, it is preferably provided that the welding is carried out with spot welding.

High melting (melting point lower than 1180"C>, especially with copper melting with melting point of approximately 1040'C, or nickel welding with melting point of approximately 1100'C. Since joining tubular parts consisting of one or more parts that were subjected to mechanical deformation, the tubular parts are subjected to a thermal process of neutralization annealing, with the support elements arranged in a suitable position, in particular at 1180"C Approximately 1, taking advantage of the heat of the neutralization annealing to carry out the brazing process. Exemplary embodiments of the invention are illustrated in the drawing, which are described with * 3 in greater detail below. It shows: in figure 1 a first arrangement according to the invention, in plan; in figure 2 the same seen according to the line of cut 11 -I I of figure 1; in figs. 3 and 4 a variant of the views according to figures 1 and 2; in figs. 5 and 6 a starting tube in raised view and in a stationary view; 2b in FIG. 7 a deformed tubular part, with reinforcement ring; in figs. 8 and 9 a tubular piece has been formed, with seat ring in various b views; in figs. 10 and 11 a pipe assembly of three tubes, with a flared coupling piece, and a connecting flange, in raised view and in cross section. In the figures of the drawing the arrangement according to the invention is shown, for joining by welding a base element 1 in the form of a thin-walled, thin-walled sheet or metal sheet part of Ib flat surface, profiled or tubular, with another component 2 of stainless steel. In the region of the joining of the elements to be joined together, a metal support element 3 with a flat surface is provided, which is preferably made of steel, in particular of stainless steel. 2? The support element 3 is fixed to the base element 1 by laser beam welding or, preferably, by copper brazing. The welding unit is indicated by the number 4. The other component 2 is welded to the support element 3 in the -b usual way. In the embodiment according to figure 1, the base element 1 consists of a super-plastic plate. The supporting element 3 also consists of a flat surface plate, the latter being welded to the base element 1 on the side of the periphery by means of a beam, or preferably welded to it by brazing. In the case of this embodiment, the other component 2 is a bolt for welding, which is welded on the support element 3, by the side opposite the base element 1. The weld between the other component 2 and the support element 3 is indicated with the number 5. The base element 1 is a very thin wall element having, for example, a thickness of wall of Ib a millimeter or less. The support element 3 can also be formed by a correspondingly thin piece of wall, being that despite the thinness of the wall, a welding connection in the correct form with the other component 2 is possible, without damaging the latter. Ü Base element 1, and without danger of breakage under the influence of continuous interaction, as regards the connection site with the base element 1. In the case of the arrangement according to figures 3 and 4, the support element 3 which is fixed to the element of 2b base 1 is an annular element of steel or of stainless steel, which is welded to the base element 1 by means of beam l or brazing, surrounding a punching 6 made in the base element 1. The other component 2 is configured as tubular piece or the like, which is welded on the front side to the support element 3. For example, this tubular piece can be an integral part of a probe for gases burned in exhaust gas systems. In the case of the embodiment explained on the basis of figures ba 11, on a base element 1 configured as a tube, in a region of the end of the respective tube (base element 1), as an element of reinforcement 3, there is a seat ring that surrounds the tube and is welded Ib with the casmiss of the tube (base element 1) by means of beam l or by means of brazing. On the seat ring (support element 3) another tubular element can be set, which is the other component 2, which can be welded to the seat ring (support element 3) or to 1 in a conventional manner. The welding site is marked with the number 4 in figure 11. For this, and according to the embodiment, especially according to figures 10 and 11, the base element 1 consists of several assembled pipes, the ends of which gathered are in each The case is surrounded by an annular element (support element 3> shaped to its shape.) For this, each annular element (support element 3) is welded with beam l or, preferably, by brazing, with the end of the tube (end of the base element 1) The b other component 2 is a tubular spliced tube piece, which can be set on the assembled ends, as can be seen particularly in figure 11, which piece is welded in the usual way with the peripheral region of the annular elements (support elements 3). The area of the weld is indicated by the number 5. The configuration according to figures 5 to 11 is particularly useful, and is intended, for the assembled pipeline of several pipes towards an exhaust connection branch pipe, in the system Ib of exhaust gases of automotive vehicles. The development of the process for manufacturing a complete part of this kind is explained based on the development shown in Figures 5 to 11. The starting piece is a basic element in 0 form of a straight tube, according to figures 5 and 6. For starters, this base element can be pre-bent with a suitable tool, so that a shape according to that of figure 7 is obtained. connection of the base element 1 formed of In this manner, a reinforcing element 3 in the shape of a ring is inserted on the side of the mouth. Next, the pre-folded tube is placed in a corresponding multi-part tool, to be bent to its proper or final shape by hydro-forming, as shown in Figures 8 and 9. In order to eliminate the stresses of the material and similar phenomena that are generated during the deformation, the base element formed according to figures 8 and 9 is subjected to a neutralizing annealing process at a temperature of approximately 1180aC. The temperature resulting from this is used to braze the support element 3 (seat ring), for which copper solder is applied on the welding zone 4, whereby the copper welding Ib melts due to the prevailing temperature (its melting point is approximately 1040 * C). In other words, the temperature required during the neutralizing annealing process is simultaneously used to carry out the welding of the support element 3 with the heating element. 2u base 1. By applying the copper solder a notch effect is not generated in the region of the joint site, as is the case, for example, in the case of a normal weld, so that the base element 1, whose confi uration is very thin wall, you can not see B exposed to a higher risk of breakage or similar phenomena due to welding. The three base elements 1 illustrated in FIGS. 10 and 11 are deformed or shaped in a corresponding manner, and they were welded with the support element 3 to subsequently fit them or set them inside the other component 2 in the form of a flared tubular splice part. , for which the welding of the edge of the other component 2 with the support element 3 is carried out l? at the site marked with the number 5. On the free end of the other component 3 is mounted and suitably joined a bundle 8, for example joined by welding to the other component 2. By arrangement according to the According to the invention, or in accordance with the process according to the invention, a weld that resists the entire service life of other components with thin-walled tubes or other thin-walled metal elements is achieved. 0 The invention is not limited to the embodiment, but within the scope of the novelty it can be varied in many ways. All new features, individual or combined, that are revealed in the description and / or the 2b drawing is considered an integral part of the invention.

Claims (8)

1. Reasons: 1. Arrangement to weld a base element in the form of a thin-walled, profiled or tubular, flat-walled metal sheet or metal part, in particular made of stainless steel, with another steel component , especially of stainless steel, for example a bolt or a piece of thin-walled metal sheet or sheet, characterized in that a flat metal support element (3) is provided in the region of the joint, which is fixed to the base element (1> by lightning welding or by brazing, and because the other component (2) is attached to the support element (3). Ib 2. Arrangement in accordance with claim 1, characterized in that the support element (3) to be fixed on the base element (1) is a plate, which is supported by lightning l or by brazing on the side of the periphery to the element 20 base (1 >), and in which the other component (2) is a bolt for welding 3. Arrangement in accordance with the rei indication 1, characterized in that the support element (3) to be fixed on the element base (1 > is an annular element, 5 which is welded by beam l or by brazing to the base element (1), surrounding a punching (6) made in the base member (1), and in which the other component (2) is a tubular piece that is coaxially attached to the annular element B. Arrangement according to claim 1, characterized in that on the base element (1) formed as a tube - preferably in one of its extreme zones - there is disposed as an element (3) of support, welded by means of beam or strong welding, a seat ring that surrounds the tube surrounding it, and in which a seal is placed on the seat ring. tubular element of the other component (2), which is attached to the seat ring. With the claim 1, characterized in that the base element is composed of several tubes that are driven together, whose ends joined in each case are surrounded by an annular element that molds to its shape, as 0 support element (3), for which each annular element is welded by laser beam or brazed with the corresponding end of the tube, and in that the other component (2 > consists of a tubular splice piece that can be pierce over 2b assembled ends, and is welded to the region of the periphery of the annular elements. 6. Method for joining a base element in the form of a thin-walled metal sheet or sheet metal part with another component according to one of claims 1 to 5, characterized in that in the region provided for The welding connection on the thin-walled sheet metal part or sheet is provided with a metallic support element, which is fixed by laser beam welding or brazing, and in which the other component is fixed on the element support for. 7. Method according to claim 1, wherein the welding is carried out with a high melting point solder (melting point lower than 1180 ° C), especially with copper solder with a melting point approximately 1040"C, or nickel solder with a melting point of 2U approximately 1100'C. 8. Procedure according to claim 6 or 7, which is characterized in that when joining tubular pieces consisting of one or more pieces that were subjected to a mechanical deformation, the tubular parts are subjected to a thermal process of neutralization annealing, with the support elements arranged in an appropriate position. , especially at about 10 ° C, taking advantage of the heat of the neutralization annealing to carry out the brazing process. 1U Ib -0 2b