WO2013102633A1

WO2013102633A1 - Semifinished hollow body having at least two parts that are welded together and a burn-through in one of said parts; method for the production thereof and method for producing a hollow body

Info

Publication number: WO2013102633A1
Application number: PCT/EP2013/050028
Authority: WO
Inventors: Thomas Bingert; Viktor Enns
Original assignee: Keiper Gmbh & Co. Kg
Priority date: 2012-01-05
Filing date: 2013-01-03
Publication date: 2013-07-11
Also published as: DE102012207699A1

Abstract

The invention relates to a semifinished hollow body (1) which is formed from at least two parts (2, 3) that are welded together and has at least one opening (4) which is formed by a burn-through of a material of the semifinished hollow body (1) during the welding process. Furthermore, the invention relates to a method for producing a semifinished hollow body (1) and a method for producing a hollow body.

Description

HOLLOW BODY HALFWARE WITH AT LEAST TWO WELDED PARTS AND BURNING IN ONE OF THESE PARTS; METHOD FOR THE PRODUCTION AND METHOD FOR THE PRODUCTION OF A HOLLOW BODY

description

The invention relates to a hollow semifinished product according to the features of

The preamble of claim 1, a method for producing a

Hollow semifinished product according to the features of the preamble of

Claim 5 and a method for producing a hollow body according to the

Features of the preamble of claim 6.

From the prior art are, as in DE 10 201 1 010 063 A1

described a body part for a motor vehicle and a method

for coating, in particular painting, of such a body part

known. The body part comprises at least two at least

partially adjacent and by first walls of the

Body part at least partially limited chambers, which are spatially separated from each other by at least one further wall of the body part. At least one of the first walls is at least

one in partial overlap with the other wall

arranged paint drain opening provided on the one hand in a and

on the other hand flows into the other of the chambers. EP 2 135 799 A1 discloses a structural part of a motor vehicle

described that is equipped with openings to the paint outlet. The

Structural part comprises at least one asymmetrical opening for draining

of paint and an attached closure piece adapted to cover the asymmetrical opening and to close the opening

cause. The closure piece comprises means for fixing the

Closure piece on the opening and means for positioning the Closure piece in relation to the opening. The means for fixing and the means for positioning allow several different

Fixation positions of the closure piece on the opening. The

Closure piece is set up so that it opens in the

covering different fixing positions of the closure piece. The various fixation positions are obtained by rotation about an axis perpendicular to the general plane of the opening.

From DE 10 2007 048 933 A1 an arrangement of a plug in the paint drain hole of a vehicle body is known. The plug has a plug-in section, with which the plug is inserted in the paint drain hole and locked there. The plug portion has on the vehicle interior side an outward annular collar, on the underside of a hot melt adhesive is applied, with which the plug stands up at the edge of the hole. The plug portion is formed as a ring with a central opening. At the upper end of the plug-in section, a lid is attached, by means of which the central opening can be closed.

In DE 10 2007 032 631 A1 an individual body stiffening in the paint line is described. In a method for stiffening

Vehicle bodies, at least one molded part is mounted during assembly of the vehicle body to a first wall segment, which limits a cavity after assembly of the vehicle body.

At least one other wall segment will be so with the first

Connected wall segment that creates a bounded by the wall segments cavity. The molding divides the cavity into at least a first and a second segment such that the two segments are connected to one another only by a gap between the wall segments and the molding. The assembled vehicle body is coated with a first coat of paint and this first coat of paint is cured. A flowable, thermally curable material is in or several segments of the cavity introduced, but not in all

Segments. The vehicle body is coated with a further lacquer layer and this is cured in a paint oven, wherein the thermally curable composition hardens and thereby stiffen the filled with the mass segment of the cavity.

From DE 203 17 681 U1 a device for computer-aided design is known. The device for constructing a

computer-accessible model of a body of a motor vehicle, wherein the model has design elements includes an electronic

Library with types of design elements, means for selecting a type from the library, means for creating a design element of a selected type and means for inserting a

Design element in the model. The library includes, as types of construction design elements, a type of holes, a type of beads, a type of stamps, a type of corners, a type of cut-outs, a type of flanges, and a type of edges. Each type has as attributes reference points of a design element of the type and their geometrical positions, geometrical dimensions of a

Design element of the type, tolerances of a design element of the type and a definition of points for measuring and / or testing a design element of the type during the manufacture of the motor vehicle.

In US 3,013,925 a method of welding is disclosed

described thermoplastic pipes. To be welded together ends of two tubes are bevelled on a pipe inside at an angle between 20 ° and 50 °. The tubes are arranged axially one behind the other, with the ends to be welded together facing each other. Between the tubes, a heating plate is arranged, on which the bevelled ends of the tubes are pressed to soften the thermoplastic material. After the beveled area softened both tubes, the heating plate between the tubes is removed and the two tubes are pressed together until they are cold and verschwei Sess together. From the published patent application DE 20 25 435 and the patent CH 534 052 a machine for printing, painting, equipping and labeling of tubes, sleeves or tubular workpieces in continuous flow is known. The machine consists of several consecutively connected and interconnected by an endless conveyor chain or chained processing groups. At least one of the processing groups contains a workpiece carrier as a rotatably mounted about a horizontal central axis turret. The turret carries the workpieces mounted on mounting spindles and provides them in the course of his

The turret is associated with a reciprocating pivotally mounted Umsteckorgan, the workpieces successively and in regular

Draws distances from the support spindles of the workpiece carrier and attaches them to the support pins of the conveyor chain. In order to enable the insertion of the workpieces by the Umsteckorgan, the conveyor chain has at the points where the Umsteckorgan at the moment of

Effective is located, in opposite places two

Arrest points. These standstill points are located in the region of two sprocket wheels lying one behind the other in the conveying direction and arranged on a pivotable double-arm lever, wherein the conveyor chain is fed to one sprocket and removed from the other sprocket. The

Conveyor chain is clamped at two points in the area of the standstill points.

In US 4,362,124 a painting device for painting of

Components in a production line described. The painting device has a plurality of painting material application units, each of these Units are connected to a plurality of Lackiermaterialzuführleitungen which transport different Lackiermaterialien.

EP 0 135 485 A2 discloses a method and a device for surface treatment of cylindrical bodies, in particular for their spray painting. The cylindrical bodies are thereby rotated during their transport through the device around its vertical axis. In US 5,164,056 a device and a method for anodic or cathodic electrical painting of hollow bodies

described. The painting is carried out by means of a water-soluble paint as the electrolyte liquid which is contacted with the cathode or anode and in at least one uninterrupted, a conductive connection

producing beam is passed to the surface of the hollow body, which forms the anode or cathode.

From US 5,127,363 a painting system for motor vehicles is known, comprising a plurality of robots and a plurality of

Cleaning devices for cleaning the robot.

WO 98/18670 A1 describes a CPKD body and its manufacture. It will be completely painted parts assembled into a body. In this completely painted knocked down method, the substructure is welded together and dip coated and the

Side parts, roof and roof cross members molded and painted completely. These body parts are then glued together and riveted. Object of the present invention is to provide an improved

Hollow semifinished product, an improved method for producing a Specify hollow body semifinished product and an improved method for producing a hollow body.

The object is achieved by a hollow semifinished product with the features of claim 1, a method for producing a

Hollow semifinished product with the features of claim 5 and a method for producing a hollow body with the features of claim 6.

Advantageous embodiments of the invention are the subject of

Dependent claims.

A hollow semifinished product according to the invention is formed from at least two parts which are welded together and has at least one opening which is formed by burning through a material of the semifinished semifinished product during the welding process.

In a coating, in particular painting of this hollow semifinished product, at least one opening allows a cleaning agent to flow out of the hollow semifinished product into an environment of the hollow semifinished product before coating and / or a coating material, in particular a lacquer, d. H. the opening runs from one

Hollow semifinished product inside through a wall of the hollow semifinished product through into a hollow body semifinished environment. Furthermore, through the opening prevents that in one

Drying process, a pressure in the hollow body increases. Such a

Pressure increase could destroy the hollow body. By introducing the opening by burning through the material of the hollow body semi-finished, ie by the burning of the material at least one of the welded or welded parts together, is no costly introduction of paint drain holes by drilling or punching required.

Conveniently, one of the parts welded together is a tube and the other part is a bolt, a cap or a lever, wherein one end of the tube is closed with the bolt, the cap or the lever. In such hollow body semi-finished such an opening is required to the described detergent outlet and / or

To ensure coating material flow and / or pressure equalization. Therefore, the at least one opening is as one

Coating material drain opening formed as a detergent drain opening and / or as a pressure equalization opening, d. H. she is

in particular, sufficiently large and at a suitable position on

Hollow semifinished product designed to perform the function.

A resulting from the coating of the hollow semifinished product

Hollow body can be used, for example, in the region of a Sitzverstellmechanismus a vehicle seat, with one of them together

welded parts is the tube and the other part is in particular designed as a lever, which is welded to one of the ends of the tube. It may also be welded, for example, at both pipe ends such lever. These levers are after installation in the

Seat adjustment mechanism with other components in operative connection. The tube is then, for example, a front or rear rotary tube and the one or more welded thereto lever serves / serve for inclination and / or

Height adjustment of the vehicle seat.

Conveniently, the welded parts are made of metal. In such parts, an introduction of paint drainage holes by drilling or punching requires a high manufacturing, time and cost. By introducing the opening in the manner described by means Welding, which is much easier possible, are reduced manufacturing costs, a production time and a manufacturing cost. The welded together parts may be in another embodiment, but also of a different material, such as plastic.

In a method according to the invention for producing such a semifinished semifinished product, at least two parts are welded together and by means of a welding device used for welding, at least one opening is made by burning through a material of the

Hollow semifinished product formed. The welding device used for this purpose is designed, for example, as a welding robot. Ie. a to

Joining the two parts required welding process is extended to the effect that in an additional process step, the opening, d. H. a hole is fired at a predetermined location in one of the parts welded together to the already described sequence of

Cleaning agent and / or the coating material and the

Allow pressure equalization.

The production of the opening is made possible, for example, by a corresponding programming of the welding robot, which firstly welds the two parts together as a result of this programming and, in an additional method step, at a predetermined point a hole, ie. H. the opening in one of the welded parts burns, which then as a drain opening for the cleaning agent and / or the

Coating material and / or acts as a pressure equalization opening. The welding of the two parts and the production of the opening takes place for example by means of MAG welding, d. H. by means of metal welding with active, ie reactive gases. With the introduction of the opening or a plurality of such openings in the manner described, the method for producing the hollow semifinished product is completed.

Alternatively, first, the opening in the manner described in a the parts are introduced and then the parts are welded together.

In a method according to the invention for producing a hollow body, at least two parts are welded together to form a semifinished semifinished product, and at least one opening is formed by burning through a material of the semifinished semifinished product by means of a welding device used for welding. Thereafter, at least one surface of the hollow semifinished product is coated.

Ie. This method comprises the previously described method for producing the hollow semifinished product, wherein after the production of the hollow semifinished product, which is performed by the described welding at least two parts and forming at least one opening by burning through a material of the hollow semifinished product by means of a welding device used for welding, at least one Surface of the hollow semifinished product is coated. In this case, the opening allows the cleaning agent and / or the coating material to flow out of the hollow body. Of

Furthermore, this prevents the pressure in the hollow body from rising during the drying process and destroying the hollow body. By introducing the opening by burning through the material of the hollow body semi-finished, d. H. by burning through the material at least one of

verschwe ßten parts together, no costly introduction of paint drain holes by drilling or punching is required. In addition, in such a drilled or punched paint drain holes a

aligned positioning of the hollow semifinished product in its

Further processing required. Conveniently, the at least one surface of the

Hollow semifinished product coated by painting. Preferably, the coated at least one surface of the hollow semifinished product by dip coating, in particular by cathodic or anodic

Dip-coating. It is particularly important that excess paint can drain from the hollow body. This is made possible by the introduced opening.

Advantageously, the semifinished semifinished product is cleaned before coating by means of a liquid cleaning agent. In this way, optimum coating quality is ensured, i. H. For example, inclusions of dirt particles in the coating are avoided and optimum adhesion of the coating to the semifinished semifinished product is achieved. Also for this cleaning process, the opening is particularly important because through them the detergent dissolved in it

Dirt particles can run completely, so that the subsequent coating is not affected by detergent residues.

Appropriately, the on the at least one surface of the

Hollow semifinished product applied coating dried. In this way, a production time is significantly reduced because the coating cures much faster. Also for this is the by the

Welding process introduced opening particularly important as a

Pressure increase in the hollow body during drying and a resulting destruction of the hollow body can be avoided. Reference to the accompanying schematic figures, the invention is explained in detail. Show

FIG. 1 schematically shows a sequence of a method for manufacturing

a hollow body, and schematically a hollow semifinished product.

Corresponding parts are the same in all figures

Provided with reference numerals.

FIG. 1 schematically shows a sequence of a method for producing a hollow body, comprising three in this exemplary embodiment

Method steps S1, S2, S3, wherein the first method step S1 and the second method step S2 are at the same time part of a method for producing a hollow semifinished product 1 shown in FIG. 2, which is a sub-method of the method for producing the hollow body.

In the first method step S1, at least two parts 2, 3 are welded together, whereby a hollow body shape of the hollow semifinished product 1 and of the hollow body formed therefrom is formed. In this case, for example, one of the parts 2, 3, in this example the first part 2, a pipe and the other part 3, 2, in this example the second part 3, is a bolt or a cap. After welding, one end of the tube is closed by the bolt or the cap.

In order to be able to coat surfaces of such hollow body molds, in particular to be able to coat them, for example by means of a dipping bath process, for example by means of cathodic dip painting or by means of an anodic dip painting, at least one opening 4 is required to form a cleaning agent and / or a coating material, for example the paint to allow a flow out of the hollow body. The paint flows expediently back into a paint bath, whereby a carryover of paint is avoided. Furthermore, through this opening 4, an increasing pressure in the hollow body during a drying process after coating, ie, for example after the dipping process, prevented. Such an increase in pressure could lead to destruction of the hollow body.

This opening 4 is in the second step S2 in the

Hollow semifinished product 1 introduced. The introduction of the opening 4 is carried out by burning through a material of the hollow body semifinished product 1 by means of a for welding the two parts 2, 3 used

Welding device, which is designed for example as a welding robot. Ie. a welding operation required for connecting the two parts 2, 3 is extended to the effect that in the second

Step S2, the opening 4, d. H. a hole is fired at a predetermined location in one of the welded parts 2, 3, to allow the flow of the cleaning agent and / or the coating material.

This is made possible for example by a corresponding programming of the welding robot, which due to this programming in the first method step S1, the two parts 2, 3 welded together and in the second step S2 at a predetermined point a hole, d. H. the opening 4 in one of the welded parts 2, 3 burns, which then as a drain opening for the detergent and / or the

Coating material acts. The welding of the two parts 2, 3 and the production of the opening 4 takes place for example by means of MAG welding, ie by means of metal welding with active, ie reactive gases. With the introduction of the opening 4 or a plurality of such openings 4 in the manner described, the method for producing the Hollow semifinished product 1 completed. Alternatively, first the opening 4 can be introduced in the manner described in one of the parts 2, 3 and then the parts 2, 3 are welded together. In the process for producing the hollow body is in the third

Process step S3 coated at least one surface of the hollow semifinished product 1, in particular painted. Coating, in particular

Painting, is particularly preferably carried out by dip coating, in particular by means of cathodic or anodic dip coating.

In this case, an outflow of the cleaning agent and / or the coating material, in particular of the paint, out of the hollow body is made possible through the opening 4. Furthermore, this prevents that in the drying process, the pressure in the hollow body increases and destroys the hollow body. By introducing the opening 4 by the burning of the material of the hollow body semi-finished product 1, d. H. by burning through the material of at least one of the welded parts 2, 3, no costly introduction of paint drain holes by drilling or punching is required. In addition, in such a drilled or punched paint drain holes an aligned positioning of the

Hollow semifinished product 1 required in its further processing.

LIST OF REFERENCE NUMBERS

1 semi-hollow body

2 first part

3 second part

4 opening

S1 first method step S2 second method step S3 third method step

Claims

claims

1 . Hollow semifinished product (1), which is formed from at least two parts welded together (2, 3) and at least one

Opening (4), which is formed by burning through a material of the hollow semifinished product (1) during the welding operation.

2. hollow semifinished product (1) according to claim 1,

characterized in that one of the welded parts (2, 3) is a pipe and the other part (3, 2) is a bolt, cap or lever, one end of the pipe being closed by the bolt, the cap or the lever is.

3. hollow semifinished product (1) according to claim 1 or 2,

characterized in that the at least one opening (4) as a coating material drain opening, as a

Detergent drain opening and / or as a

Pressure compensation opening is formed.

4. hollow semifinished product (1) according to one of claims 1 to 3,

characterized in that the welded together

Parts (2, 3) are made of metal.

5. A method for producing a hollow semifinished product (1) according to one of claims 1 to 4, wherein at least two parts (2, 3) are welded together and by means of a for welding

used welding device at least one opening (4) by burning through a material of the hollow body semi-finished product (1) is formed.

6. A method for producing a hollow body, wherein for forming a hollow semifinished product (1) at least two parts (2, 3) are welded together and by means of a welding device used for welding at least one opening (4) by burning through a material of the hollow semifinished product (1 ) is formed and thereafter at least one surface of the

Hollow semifinished product (1) is coated.

7. The method according to claim 6,

characterized in that the at least one surface of the hollow body semi-finished product (1) is coated by painting.

8. The method according to claim 6 or 7,

characterized in that the at least one surface of the hollow body semi-finished product (1) is coated by dip coating.

9. The method according to any one of claims 6 to 8,

characterized in that the semifinished semifinished product (1) is cleaned before coating by means of a liquid cleaning agent.

10. The method according to any one of claims 6 to 9,

characterized in that the coating applied to the at least one surface of the semifinished semifinished product (1) is dried.