DE102008005508A1 - Cupped head pin for stud welding has shaft welded to head, which may be of same material as pin - Google Patents

Abstract

The cupped head pin (1) has a shaft (2), one end of which is welded to a metal carrier. The disc-like head (4) is on the lower end or tip (3) of the shaft. The shaft is welded to the head. The shaft and the head may both be made of the same material, such as steel, aluminum or brass. The diameter of the shaft may be between 0.8 and 2.5 mm and the head may be of a thickness of 0.4 to 1.0 mm.

Description

The The present invention relates to a metallic disk pin according to the The preamble of claim 1, comprising a shank having one end for welding with a metallic carrier is provided, and at the other end a disc-like head is arranged.

plate pins This species has been known for some time in particular for fastening insulating or insulating materials used on metallic substrates. A typical application example is the attachment of such materials to ventilation ducts or ship walls for sound and / or heat insulation. The insulating or insulating material is in this case in Form of a mat of a substantially electrically non-conductive Material, such. As glass or rock wool before. The dish pin will hereby with his shank stung through this mat until the stem tip touches the metallic base. By creating a High voltage with the help of a welding gun is then between the stem tip of the dish pin and the metallic pad an arc ignited, which is the tip of the pen to the Melting brings. At the same time, the pen is against the pad pressed so that it becomes a weld Tip on the metallic pad comes. The plate or disc-like Head then serves as the metallic pad opposite one another Anchoring element, which unintentional release of insulating or insulating material prevented. Further, as the Insulating mats on their top to increase the Strength often with a thin metal foil or a Metallic network are also covered by insulation provided at the bottom of the head and in the area of the shaft, to avoid short circuits and a reliable one Welding the shaft with the metallic base to enable.

A plate pin of this kind is, for example, from the German utility model DE 201 17 441 U1 the applicant known. Here, the head is first punched from a sheet metal and then fastened by means of a rivet on the shaft for the preparation of the disk pin. The underside of the head can be provided with an insulating adhesive film. Furthermore, an insulating element can subsequently be attached in the shaft region.

Furthermore, for example, from the EP 0 639 424 A1 a welding stud is known in which the bolt is completely punched out of a sheet metal strip and deformed to the final shape. In particular, in this case, a shaft is formed in that a thin strip is bent by 90 ° relative to a remaining head region and then deformed into a tubular shape. However, this bolt has not proven in practice because of problems in the subsequent welding in practice.

After all is also a variant for fixing Dämmmaterialien known on a metallic carrier, at first individual thin pins welded to the carrier become. The mat-shaped insulation material is then placed on the support, the individual pins the Pierce the mat. With the help of special clips, which subsequently at the opposite end of the substrate are applied to the pins, then an unintentional Loosening of the insulating material prevented. Be here so to speak, the plate pins only in one already on the metallic carrier welded state formed.

all These known approaches have in common that the plate pins relatively expensive to produce are. Furthermore, it has been found that, for example, the fastening of the shaft on the head with the help of a rivet only at some particular Materials leads to satisfactory results. At long last There is therefore a need to do so, plate pins the type described above in the simplest possible way to be able to produce.

The Task is by a disk pin with the features of the claim 1 or by a method for producing a plate pin according to claim 6 solved. Advantageous developments of the invention are Subject of the dependent claims.

The inventive solution is based on the Thoughts attaching the shaft to the head by welding make.

According to the The present invention thus becomes a disk pin for stud welding proposed, the one shaft, one end of the verscheißen is provided with a metallic support, as well as a disc-like head located at the other end of the shaft having, according to the invention, the shaft with welded to the head. Furthermore, a method for Producing such a plate pin proposed which according to the invention is characterized in that the shaft is welded to the head.

The procedure according to the invention leads to a plate pin of high quality. By welding a reliable connection between the shaft and head can be achieved. Furthermore, the welding is easier to perform than the steps described above for mechanical connection between the shaft and head. In this case, there is a particular advantage, in particular, that the procedure according to the invention is not is restricted to certain materials. While less satisfactory results have been achieved with the riveting between the shaft and the head in some materials, the welding according to the invention can be carried out independently of the choice of material, as long as the material used is suitable for welding. Thus, it is possible, for example, the plate pin made of steel (eg., V2A), aluminum or brass.

Further There are no dimensional restrictions the various components of the dish pin. The shaft preferably has a diameter of 0.8 to 2.5 mm, the head can turn have a thickness in the range of about 0.4 to 1 mm.

One Another advantage of the solution according to the invention is also that due to the welding it it is not necessary for the shank to penetrate the head. With In other words, the top of the head can in the disk pin according to the invention be perfectly smooth, creating the visual impression of the pen is further improved.

As Even with the already known plate pins can be an insulation be provided to even then a reliable welding with a carrier to allow if the top of the insulating material to be fastened with a metallic Foil is provided. This can be done at the bottom of the head and / or in the area of the shaft insulation by appropriate coating or by additional elements.

The Shape of the head is not limited to specific structures. Usually will use a circular head, however can also other forms such. As squares, multi-corner or ellipses are used. It can either first the head punched out of a larger sheet metal part and then welded to the shaft. The reverse approach would be conceivable. in this connection First, the stem is a plate-shaped Welded substrate and then the head together with the shaft located thereon from the carrier material punched out. Finally, the head could be with the shaft also be welded into a state in which the Shaft already attached to a support and for mounting a Dämmmaterials was used. Compared to the The procedure described at the beginning is therefore not a separate clip mechanically applied to the stem, but instead in a simpler way Way the head is welded on.

At long last leads the solution according to the invention to a very simple production of a high quality Plate pin.

following the invention with reference to the accompanying drawings closer be explained. Show it:

1 a side sectional view of the plate pin according to the invention;

2 the plate pin of 1 in supervision;

3 the underside of the plate pin according to the invention and

4 an application example of the plate pin according to the invention, in which an insulating mat is attached to a carrier.

The in the 1 to 3 illustrated dish pin 1 for stud welding consists of an elongated shaft 2 whose lower end becomes a tip 3 shaped and provided for welding with a metallic carrier. At the opposite end of the top 3 is the shaft 2 with a disc-shaped head 4 It should be noted that the shape of the head 4 is not limited to the illustrated circular disc. So could the head 4 For example, be designed in the form of a polygon or an ellipse. Depending on the application, this gives rise to preferred forms for the head 4 which are all within the scope of the present invention.

Also in terms of dimensions for the shaft 2 and the head 4 There are no fundamental restrictions. Preferably, the shaft has 2 a diameter of about 0.8 to 2.5 mm, the head 4 Again, it can be 0.4 to 1 mm thick. Regarding the length of the shaft 2 as well as the size of the head 4 There are no restrictions. As materials for the shaft and the head, all materials are conceivable which are suitable for welding. In particular, the use of steel (especially V2A), aluminum or brass would be conceivable.

As with other prior art pad pins, it may be provided that on the underside of the head 4 and / or insulation in the shaft area 9 is trained. This can be done, for example, by an appropriate coating of the surfaces with an insulating material or the application of an insulating film. Also, the placement of separate insulating elements, such as, for example, from the DE 201 17 441 U1 is known, would be conceivable. The insulation 9 may be over the entire shaft area or only over part of the shaft 2 extend to the head 4 is facing, as in 1 is shown.

The peculiarity of the plate pin according to the invention 1 is now in the connection between the shaft 3 and head 4 , While in the prior art usually a mechanical connection between the two components was provided, it is now provided according to the invention that the disk pin 1 is made by the fact that the shaft 2 with the head 4 is welded. As in 1 shown schematically, so the connection between the shaft 2 and head 4 over a welded joint 5 at the bottom of the head 4 or the top 3 opposite end of the shaft 2 ,

The procedure according to the invention of welding the pin 2 with the head 4 brings the first with the advantage that this way a very good connection between the two components is achieved. Furthermore, since the shaft 2 in this case the head 4 does not penetrate, is the top of the head 4 - as in 2 shown - formed completely smooth or closed. Compared to previously known solutions in which a riveting was provided between the shaft and head, the disc pin according to the invention 1 So also optical advantages.

The inventive welding between shank 2 and head 4 can in principle be carried out with all materials which are suitable for welding. This is also an advantage over previously known approaches, since rivet-to-head riveting has often been achieved satisfactorily only with certain materials. When welding according to the invention, however, in particular there is no risk of damage to the shaft 2 or his tip 3 , which significantly expands the possibilities of use and the choice of available materials. For example, the use of brass, aluminum or steel, in particular V2A, would be conceivable. Ultimately, it would therefore be conceivable, the disc pin according to the invention 1 by welding a conventional nail with a head 4 to make the forming disk.

The production of the plate pin according to the invention 1 can then basically be done according to two different alternatives. In a first alternative, the plate-shaped head is first 4 punched out and then with the shaft 2 welded. In a second variant, however, first several shafts are welded onto a larger plate-shaped carrier material. Subsequently, the individual heads are punched out of the material from this carrier material with the already existing shafts.

4 now shows a conceivable application of the plate pins according to the invention 1 , These serve in the illustrated embodiment, a mat-shaped insulating or insulating material 10 on a metallic carrier 20 to fix. In this carrier 20 it may, for example, be a ship's wall or a ventilation duct, for example with the help of the insulating material 10 a thermal insulation is sought. Also for sound insulation purposes such insulation materials can be applied.

The mat-shaped insulating material consists - as shown - from a thicker area of the insulating material 11 , for example made of glass or rock wool. At the top of this non-conductive material 11 is then in a known manner to increase the strength of a thin metal foil 12 or, for example, a metallic mesh attached.

For fixing the insulation material 10 this is now on the substrate 20 hung up. Then the insulation material 10 with the help of the tip 3 of the dish pin 1 punctured until the top 3 the carrier material 20 reached. By applying a high voltage using a welding gun is then between the stem tip 3 of the pen 1 and the metallic base 20 an arc ignited the top 3 melts. At the same time the plate pin 1 against the pad 20 pressed, making it ultimately a welded joint 21 between the pen 1 and the carrier 20 comes. The widened head 4 then prevents slipping of the insulating material in this case 10 so that this firmly adheres to the carrier 20 is anchored. The above-mentioned insulation in the head region or in the upper region of the shaft 2 prevents a short circuit during the welding process and ensures a reliable welding of the plate pin 1 on the carrier 20 is possible.

Like now 4 shows, results when using the plate pin according to the invention 1 ultimately an arrangement in which only the smooth tops of the Tellerstiftköpfe 4 are recognizable. Compared to previously known solutions so a better look is achieved. Furthermore, there is the smooth design of the heads 4 also not the risk of other materials on the plates 1 get stuck.

A conceivable variant of the solution according to the invention can now also consist in that the heads 4 with the shanks 2 only be welded in a state in which the shafts 2 with their bottoms already with the vehicle 20 welded and the mat-shaped insulation material 10 was hung up. In this case, the shaft is preferably designed as a double-sided nail, as a result of the laying of the insulating material 10 is relieved. Again, a reliable Ver bond between shank 2 and head 4 achieved.

At long last performs the method according to the invention So that plate pins for stud welding in high Quality and easy way can be produced.

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

• - DE 20117441 U1 [0003, 0023]
• - EP 0639424 A1 [0004]

Claims (8)

Plate pin ( 1 ) for stud welding with • a shank ( 2 ) of which one end is for shedding with a metallic carrier ( 20 ), and one at the other end of the shaft ( 2 ) disc-like head ( 4 ), characterized in that the shaft ( 2 ) with the head ( 4 ) is welded. A disc pin according to claim 1, characterized in that the shaft ( 2 ) and the head ( 4 ) consist of the same material, in particular steel, aluminum or brass. Plate pin according to one of the preceding claims, characterized in that the shaft ( 2 ) has a diameter of about 0.8 to 2.5 mm. Plate pin according to one of the preceding claims, characterized in that the head ( 4 ) has a thickness of about 0.4 to 1.0 mm. Plate pin according to one of the preceding claims, characterized in that on the underside of the head ( 4 ) and / or in the area of the shaft ( 2 ) insulation is provided. Method for producing a plate pin ( 1 ) for stud welding according to one of the preceding claims, characterized in that the shaft ( 2 ) with the head ( 4 ) is welded. Method according to claim 6, characterized in that first the head ( 4 ) is punched and this then with the shaft ( 2 ) is welded. Method according to claim 6, characterized in that first the shaft ( 2 ) is welded to a plate-shaped carrier material and then the head ( 4 ) with the shaft ( 2 ) is punched out of the carrier material.