DE102007005533A1 - Device for joining workpieces by welding comprises two processing units each having a drive, a voltage source for a wire and a gas feed - Google Patents

Abstract

Device for joining workpieces comprises two processing units each having a drive (6, 7), a voltage source for a wire and a gas feed (10, 11).

Description

contraption for joining of workpieces by means of a machining head using a welding process, wherein the machining head with a guide for two, each with a voltage source and a drive connected wires and equipped with a gas supply line.

Under welding one understands the insoluble one Connecting components using heat or pressure - with or without additional Materials. When welding same basic materials in a liquid state with each other connected. In this case, the joints to be joined at the weld Substances briefly melted, leaving the materials flow into each other. The oldest form of welding is the fire welding. The metals to be joined in the fire under Luftabschluss brought into a doughy state and then by great pressure, for example, by hammer blows, connected with each other. These are allowed initially not too strong, otherwise the parts to be joined be bruised again. With fire welding were earlier The blacksmith also forged weapons. Nowadays the required Melting temperature generated either with an electric arc or over a flame introduced.

A The constant demand of the industry is to increase productivity in the industry welding production. In fusion welding can increase productivity be met by increased Abschmelzleistung. During arc welding, the Depositing performance by embedding iron powder in the electrode almost double. The same effect had the introduction of MAG welding, which the arc hand welding displaced. Through the further development of the conventional MAG process by the wire feed speed using a special Protective gas increased was again succeeded in doubling the Abschmelzleistung.

At the manual welding let yourself the welding speed by elevating increase the melting rate only to a limited extent. The limit is at the ability the operator, the torch quietly and quickly over a weld to lead. This Limit falls when fully automatic welding away. But there are limits to that a single wire-melting wire electrode forms the seam root easy to grasp and at the same time to fill up the weld as effectively as possible.

Known is, in mechanical fusion welding two electrodes in short Distance to the joint respectively and melt together in a single weld pool. Similarly, in MAG welding, two wire electrodes run in the sweat bath. If these are fed by a power source, this is called double-wire welding. Become the two electrodes, however, from two separate power sources and two electrically separate contactors in a common Torch melted, the process is called tandem welding. The use of tandem welding in connection with an industrial robot is obvious.

In In industrial production, such robots are for the most diverse Tasks and work steps used. Here are the individual Machines at fixed places set up and the workpieces to be processed are transported from one production unit to the next. Here are just the transport routes and the filling and emptying the machines time-consuming and cost-consuming operations. Of Further can individual processing devices often not so often be used as it is more economical View would be desirable. Especially for the Application of different manufacturing processes often becomes one Variety of individual manufacturing equipment needed.

In front In this background, the invention is based on the object Device of the type mentioned in such a way that different methods of joining of workpieces can be carried out with an industrial robot with little changeover time.

These Task is solved with a device according to the features of the claim 1. The dependent claims relate to particularly expedient developments the invention.

According to the invention is thus a device for joining of workpieces by means of a machining head using a welding process, wherein the machining head with a guide for two, each with a voltage source and a drive connected wires and provided with a gas supply line, provided in which the Device consists of two processing units, each of which a drive and a voltage source for a wire and a gas supply line assigned. This makes it possible by means of the device workpieces to be used for joining according to different methods. By the Possibility of different Provide shielding gases in a single machining head, without To change gas supply lines or even to exchange tools, can idle times be avoided. Now for two Applications must be invested only in one device, reduced the needed Production space and capital are saved.

For permanent establishments that exclusively Method of welding Apply, it is advantageous that the second processing unit a drive, a voltage source for a wire and a gas supply line to perform having a deviating from the first processing unit welding process. This makes it possible dependent from the base materials of the workpiece used or the claims the weld immediately the welding process and / or the auxiliary substances used, such as the wire or the protective gas switch. The machining head can be made with wires of different alloys, such as steel and copper-silicon. Because the processing head has multiple feeds associated with each wire for different Has gases, it is also possible the machining head with different shielding gases, such as Example argon or Corgon, a mixture of carbon dioxide and Argon, simultaneously or alternately to feed.

To the Joining of workpieces is it cheap that the second processing unit a drive and a voltage source for one Wire and a gas supply line for performing a soldering to the Joining of workpieces having. This makes it possible on the workpiece both a welding process as well as a soldering process for joining apply without the workpiece released from the clamping in the device or the machining head must be changed.

For the industrial Manufacturing, it is advantageous that the machining head in particular solvable Having fixative for connection to an industrial robot. This makes it possible make better use of the robot used. As the device of the invention several methods of joining of workpieces makes it possible to do without conversions a facility for several tasks are used. So it is possible, installation space and additional To save investments.

Cheap for applications With low repeatability and quantity it is that of the machining head a holding means for manual handling by an operator. This makes it possible different methods of joining to use while the operator only needs to handle one device.

The Invention leaves numerous embodiments to. To further clarify its basic principle is one of them shown in the drawing and will be described below. These shows in

1 a sketched structure of a device for joining;

2 a schematic section through a machining head.

1 shows a device 18 with a processing head 1 and two processing units for joining workpieces 2 , The machining head 1 is with a fixative 20 on an industrial robot 3 attached and is guided by this according to predetermined paths. By means of the two processing units and the single processing head 1 It is possible to have a welding process and a soldering process on the workpiece 2 apply. Each processing unit moves one of the required and in 2 reproduced different wires 4 . 5 independently, by means of one of the drives 6 . 7 , Likewise, of each processing unit one of the required gases from their storage containers 8th . 9 independently of each other via separate lines 10 . 11 in the processing head 1 directed. The control devices 12 . 13 for the methods of joining and the control device 14 for the movements of the industrial robot 3 be from a central control 15 with a control panel 16 regulated and are interconnected by means of signal lines 17 connected.

2 shows a section through the machining head 1 , Here are the lines 10 . 11 the required gases and the guidance 19 for the different wires 4 . 5 to recognize.

1

processing head

2

workpiece

3

industrial robots

4

wire (1st method)

5

wire (2nd method)

6

Drive (for wire 4 )

7

Drive (for wire 5 )

8th

Reservoir (gas for 1. Method)

9

Reservoir (gas for 2. Method)

10

Pipe (from storage tank 8th )

11

Pipe (from storage tank 9 )

12

control device (1st method)

13

control device (2nd method)

14

control device (Industrial robot)

15

headquarters control

16

Control panel

17

signal line

18

contraption

19

guide

20

fixer

Claims (6)

Contraption ( 18 ) for joining workpieces ( 2 ) by means of a processing head ( 1 ) using a welding process, wherein the machining head ( 1 ) with a guided tour ( 19 ) for two with each of a voltage source and a drive ( 6 . 7 ) connected wires ( 4 . 5 ) and equipped with a gas supply line, characterized in that the device ( 18 ) has two processing units each having a drive ( 6 . 7 ), a voltage source for a wire ( 4 . 5 ) and a gas supply line ( 10 . 11 ) assigned. Contraption ( 18 ) for joining according to claim 1, characterized in that the second processing unit is a drive ( 7 ), a voltage source for a wire ( 5 ) and a gas supply line ( 11 ) for performing a deviating from the first processing unit welding process. Contraption ( 18 ) for joining according to claim 1, characterized in that the second processing unit is a drive ( 7 ), a voltage source for a wire ( 5 ) and a gas supply line ( 11 ) for performing a soldering process for joining workpieces ( 2 ) having. Contraption ( 18 ) for joining according to at least one of the preceding claims, characterized in that the machining head ( 1 ) a guided tour ( 19 ) for a wire designed as a welding wire electrode ( 4 ) and / or a wire designed as solder ( 5 ) having. Contraption ( 18 ) for joining according to at least one of the preceding claims, characterized in that the machining head ( 1 ) a particular releasable fixing agent ( 20 ) for connecting to an industrial robot ( 3 ) having. Contraption ( 18 ) for joining according to at least one of the preceding claims, characterized in that the machining head ( 1 ) has a holding means for manual manipulation by an operator.