DE102016217025A1 - METHOD FOR OPERATING A SOUND ROLLING DEVICE, ROLE ROLLING DEVICE, AND SOUND ROLLING WELDING SYSTEM - Google Patents

Abstract

The present invention describes a method for operating a friction stir welding device (1). According to the invention, a detection (M1) of a rotational body temperature value of an end region (12) of a rotational body (10) of the friction stir welding device (1) that projects through an end recess (31) of a shoulder device (30) of the friction stir welding device (1) is detected (M2) of an actual temperature value of a region of the shoulder device (30) surrounding the end recess (31) of the shoulder device (30) and on the basis of the detected rotational body temperature value and the detected actual temperature value a regulation (M3) of the temperature of the end recess ( 31) of the shoulder device (30) surrounding region of the shoulder device (30) to a temperature dependent on the rotational temperature temperature target temperature. Furthermore, a friction stir welding device (1) and a friction stir welding system (100) are described.

Description

The present invention relates to a method of operating a friction stir welding apparatus, a friction stir welding apparatus, and a friction stir welding system.

From the DE 10 2005 030 800 A1 is a friction stir welding device with a rotationally driven rotary body is known, which has a through a recess of a non-rotatable shoulder extending through, pin-shaped end portion. Here, a gap is formed between the recess and the pin-shaped end portion. For sealing such a gap against penetration of welding material discloses the DE 10 2014 004 331 B3 a sealing package inserted into this gap.

To avoid adhesion of welding material to the shoulder of a friction stir welding apparatus disclosed in US Pat US 6,516,922 B1 a friction stir welding method in which a cooling of the shoulder takes place.

It is one of the objects of the present invention to provide a method enabling improved operation of a friction stir welding apparatus.

It is a further object of the present invention to provide an improved friction stir welding apparatus and an improved friction stir welding system.

These objects are achieved by the subject matters of the independent claims.

Advantageous embodiments and further developments will become apparent from the dependent claims to the independent claims in conjunction with the description.

• – Erfassen eines Rotationskörper-Temperaturwerts eines durch eine Endausnehmung einer Schultereinrichtung der Rührreibschweiß-Vorrichtung hindurchragenden Endbereichs eines Rotationskörpers der Rührreibschweiß-Vorrichtung;
• – Erfassen eines Ist-Temperaturwerts eines die Endausnehmung der Schultereinrichtung umgebenden Bereichs der Schultereinrichtung; und
• – auf Basis des erfassten Rotationskörper-Temperaturwerts und des erfassten Ist-Temperaturwerts Regeln der Temperatur des die Endausnehmung der Schultereinrichtung umgebenden Bereichs der Schultereinrichtung auf eine von dem Rotationskörper-Temperaturwert abhängige Soll-Temperatur.

According to a first aspect of the invention, a method for operating a friction stir welding device is provided. The method comprises the following method steps:

• Detecting a rotational body temperature value of an end portion of a rotating body of the friction stir welding apparatus projecting through an end recess of a shoulder device of the friction stir welding apparatus;
• Detecting an actual temperature value of a region of the shoulder device surrounding the end recess of the shoulder device; and
• On the basis of the detected rotational body temperature value and the detected actual temperature value, regulating the temperature of the region of the shoulder device surrounding the end recess of the shoulder device to a desired temperature dependent on the rotational body temperature value.

The method according to the invention thus comprises measuring both the temperature of an end region of a rotary body or spin pin and measuring the temperature of that region of a shoulder recess in which the end region of the rotary body protrudes through an end recess of the shoulder device. A gap width of a gap which extends between the end recess and the end region of the rotation body is dependent on the temperature of these components due to a temperature-dependent expansion behavior of the rotation body and the shoulder device. According to the invention, the temperature of the shoulder device is regulated to a setpoint temperature, which is dependent on a measured temperature of the rotary body. By regulating the temperature of the shoulder device to the desired temperature thus takes place an adjustment of the gap width of the gap. In particular, an adjustment of the inner diameter of the end recess to the outer diameter of the end portion of the rotating body. This offers the advantage that the inner diameter of the end recess and the outer diameter of the end portion of the rotating body can be designed such that result in very small gap widths. As a result, the entry of welding material into the shoulder device is reliably prevented regardless of the temperatures that arise as a result of a welding process. Furthermore, the reliability of the friction stir welding device is increased by the method described above, since rubbing of the rotating body on the inner surface of the Endausnehmung is avoided by adjusting the diameter of the Endausnehmung means of temperature control.

In the dependence of the target temperature of the temperature of the rotating body can be taken into account in particular, which outer diameter of the end portion of the rotating body has at a certain temperature and which inner diameter has the Endausnehmung at a certain temperature. In particular, the dependency can be designed in such a way that the setpoint temperature increases with increasing rotational body temperature values and becomes smaller as the rotational body temperature values decrease.

According to an advantageous embodiment of the method is provided that the rules of the temperature of the Endausnehmung the shoulder device surrounding region of the shoulder device comprises heating or cooling of the surrounding the Endausnehmung the shoulder device area of the shoulder device. In particular, the shoulder device is in each case supplied with a heating power or cooling power which is dependent on the desired temperature.

The heating can be done in particular with a heater, which z. B. may be part of the friction stir welding device. The cooling can be done in particular by means of a cooling device. In principle, the cooling device can also be part of the friction stir welding device. Preferably, however, the cooling device is designed as a separate device. Also, a combined heating-cooling device, for. B. be provided in the form of a blower, which is a temperature-controlled according to the target temperature cooling fluid, for. As air promotes to the shoulder device. Also, a combined heating-cooling device can be used.

Particularly preferably, the detection of the rotational body temperature value takes place by means of a pyrometer. This measurement method based on the heat radiation of the rotation body offers the advantage that the temperature detection is possible without contact. In this way, the rotational body temperature value can advantageously also be detected while the body of revolution is rotating.

• – Bestimmen eines Ist-Außendurchmesserwerts des zweiten Endbereichs des Rotationskörpers aus dem erfassten Rotationskörper-Temperaturwert mittels einer Außendurchmesserfunktion, welche den Außendurchmesserwert als Funktion des Rotationskörper-Temperaturwerts angibt;
• – Bestimmen eines Ist-Innendurchmesserwerts der Endausnehmung aus dem erfassten Ist-Temperaturwert mittels einer Innendurchmesserfunktion, welche den Innendurchmesserwert der Endausnehmung als Funktion des Ist-Temperaturwerts angibt;
• – Berechnen eines Ist-Spaltweitenwerts eines sich zwischen der Endausnehmung und dem zweiten Endbereich des Rotationskörpers erstreckenden Spalts;
• – Vergleichen des Ist-Spaltweitenwerts mit einem Soll-Spaltweitenwert;
• – Bestimmen eines Innendurchmesser-Vorgabewerts für den Innendurchmesser derart, dass sich der Soll-Spaltweitenwert ergibt; und
• – Ermitteln der Soll-Temperatur aus der Innendurchmesserfunktion.

According to a particularly advantageous embodiment of the method, it is provided that the regulation of the temperature of the region of the shoulder device surrounding the end recess of the shoulder device further comprises the following steps:

• Determining an actual outer diameter value of the second end region of the rotational body from the detected rotational body temperature value by means of an outer diameter function, which indicates the outer diameter value as a function of the rotational body temperature value;
• - Determining an actual inner diameter value of the Endausnehmung from the detected actual temperature value by means of an inner diameter function, which indicates the inner diameter value of the Endausnehmung as a function of the actual temperature value;
• Calculating an actual gap width value of a gap extending between the end recess and the second end region of the rotation body;
• Comparing the actual gap width value with a desired gap width value;
• - determining an inside diameter default value for the inside diameter such that the target gap width value results; and
• - Determining the target temperature from the inner diameter function.

According to this development, in particular an actual gap width value is calculated directly from the measured temperatures of the rotary body and shoulder device and compared with a desired gap width value. Based on the comparison, an inner diameter set value for the inner diameter of the end recess is determined so as to give the target gap width value. In particular, this can be done by varying a variable describing the inner diameter default value until a difference between the value of the inner diameter default value calculated from the value of the variable and the actual outer diameter is less than or equal to a certain threshold value. It is a particular advantage of this development of the method that an inner diameter function is used both for determining the actual inner diameter and as an inverse function for determining the desired temperature. As a result, the computational complexity of the method can be kept low and simultaneously carried out a continuous determination of the target temperature.

According to an alternative embodiment of the method, it is provided that the regulation of the actual temperature comprises determining the desired temperature value as the detected rotational body temperature value. Thus, the temperature of the shoulder device is controlled to the measured temperature of the end portion of the rotating body. This offers the advantage that the control function can be implemented extremely simply and with very little computational effort. At the same time an efficient gap width control, which prevents the ingress of dirt into the shoulder device realized.

According to another aspect of the invention, there is provided a non-transitory computer-readable memory that stores a program configured to cause a computer to perform a method according to any one of the preceding embodiments. Specifically, the non-volatile memory may be referred to as a hard disk, a compact disk (CD), a digital versatile disc (DVD), a floppy disk, an erasable programmable read only memory, also called an EPROM, a flash memory or the like be executed. EPROM is an abbreviation for the English term "erasable programmable read-only memory".

According to a third aspect of the invention, a friction stir welding apparatus is provided. The friction stir welding device has a rotational body rotatable about a longitudinal axis, which can be coupled to a drive device at a first end region, and a shoulder device having an end recess. A second end portion of the rotation body located opposite to the first end portion of the rotation body with respect to the longitudinal axis protrudes through End recess through. Furthermore, the Rührreibschweiß device has a control device with a first input, which is adapted to receive a rotation body temperature representing rotational body temperature signal as an input signal, a second input, which is adapted to an an actual temperature of the Endausnehmung the A first output, which is adapted to provide a predetermined due to the rotational body temperature signal and the actual temperature signal by a control function temperature control signal as an output signal for controlling the actual temperature to provide shoulder means surrounding area of the shoulder device.

Accordingly, a friction stir welding device is specified with a control device. The control device has a first and a second input. The first input forms an interface for receiving a rotational body temperature signal representing a temperature of an end region of a rotational body of the friction stir welding device. The second input forms an interface for receiving an actual temperature signal. The actual temperature signal represents a temperature of a portion of a shoulder device of the friction stir welding apparatus having a recess through which the end portion of the rotation body protrudes. The rotational body temperature signal and the actual temperature signal each form an input signal. The input signals which can be applied to the interfaces form input variables for a regulating function of the regulating device. The control device outputs as an output variable a temperature control signal, which is provided at a first output of the control device. The first output thus forms a further interface of the control device. The temperature setting signal is provided for regulating the actual temperature of the region of the shoulder device surrounding the end recess of the shoulder device. The thus designed control device advantageously allows the regulation of the temperature of the shoulder device and thus an adjustment of a gap width of a gap extending between the end recess and the end region of the rotary body. In particular, an adaptation of an inner diameter of the end recess to the outer diameter of the end region of the rotational body is made possible. This offers the advantage that the inner diameter of the end recess and the outer diameter of the end portion of the rotating body can be designed such that result in very small gap widths. As a result, the entry of welding material into the shoulder device is reliably prevented regardless of the temperatures that arise as a result of a welding process. Furthermore, the Rührreibschweiß device has improved reliability, since rubbing of the rotary body is avoided on the inner surface of the Endausnehmung by adjusting the diameter of the Endausnehmung by means of the temperature control.

The friction stir welding apparatus is also advantageously suitable for carrying out the method described above. The aspects and advantages disclosed for the method thus also apply analogously to the friction stir welding device and vice versa.

By means of the temperature control signal provided at the first output of the control device, for example, a heating or a cooling device or a combined heating and cooling device which can be coupled to the first output can be actuated.

According to an advantageous embodiment of the friction stir welding device, it is provided that the control device has a processor designed to generate the temperature control signal and a memory which can be read by the latter and on which the control function is stored. The memory may in particular be designed as the non-volatile computer-readable memory described above. The processor forms an arithmetic unit. The design of the control device with a memory and a processor offers the advantage that the control function can be implemented in a simple manner as software. This allows a simple adaptation of the control function to different boundary conditions by programming.

According to a further advantageous refinement friction stir welding device, the shoulder device has a base body, in which the end recess of the shoulder device is formed. The shoulder device accordingly has a shaped body, for. As a block or the like, as a base body. In this way, the shoulder device is formed with a minimum number of components.

Alternatively, the shoulder device may comprise a base body, in which a base body recess is formed, and an end disk coupled thereto, in which the end recess of the shoulder device is formed. Accordingly, a second recess having end plate is provided in addition to the first recess having a base body. The recess of the end plate in this case forms the end recess of the shoulder device. In this case, the end recess defining the gap width is in a separate part from the base body educated. Thus, the amount of energy that is necessary to adjust the gap width by means of temperature control, can be reduced because only the end plate has to be heated or cooled.

According to a further aspect of the invention, a friction stir welding system is provided with a friction stir welding apparatus according to one of the embodiments described above and with a heater coupled to the first output of the control means for adjusting the actual temperature of the region surrounding the end recess of the shoulder means of the shoulder means.

In this way, a particularly simple constructed Rührreibschweiß system can be realized. In particular, only one heating device is provided. This offers the advantage that the gap width can be made very small and can be kept approximately constant by means of the heating device in the case of a rotating body which heats up during the welding process. Furthermore, this allows a simple structure of the control function.

The heating device is preferably designed as an electrical conductor surrounding the end recess of the shoulder device. Accordingly, the heater is integrated into the friction stir welding device. In this way, on the one hand, a very low-loss heating of the area surrounding the end recess of the shoulder device can take place. Furthermore, such a design offers the advantage that possibly penetrated into the gap welding material can be easily emptied out of the gap by means of the heater.

According to a further advantageous embodiment, the friction stir welding system additionally has a cooling device for cooling the shoulder device in the area surrounding the end recess. The control device additionally has a second output which is designed to provide a cooling signal predetermined by the control function on the basis of the rotational body temperature signal and the actual temperature signal as an output signal. Furthermore, the cooling device is coupled to the second output of the control device. This configuration advantageously makes it possible, in particular, to reduce the inside diameter of the end recess of the shoulder device. Thus, penetration of welding material into the gap can be reliably avoided in a flexible manner for changing welding conditions.

According to a further embodiment of the friction stir welding system, it is provided that the friction stir welding device has a first temperature sensor coupled to the first input of the control device. Accordingly, the first temperature sensor is assigned to the friction stir welding device both functionally and structurally. This advantageously enables a reliable and continuous detection of the rotational body temperature.

Preferably, the first temperature sensor is designed as a pyrometer, wherein the rotational body has a longitudinal recess extending from the first end region along the longitudinal axis of the rotational body to the second end region of the rotational body and a detector of the pyrometer faces the recess. The longitudinal recess is in particular formed as an access channel ending at the second end region for detecting heat radiation emitted by the second end region of the rotary body. The pyrometer advantageously allows non-contact temperature measurement on the rotating body rotating during operation of the friction stir welding device. The longitudinal recess further achieves the advantage that the temperature of the second end region of the rotation body can be reliably detected even when the second end region is arranged in the operating state of the friction stir welding device between components to be connected.

According to a further advantageous development, the friction stir welding system additionally has a kinematically coupled to the friction stir welding device first movement device by means of which the friction stir welding device is movable. The movement device may in particular be designed as a manipulator of a robot, as a linear actuator system or the like. Preferably, the movement device allows mobility of the friction stir welding device in three spatial directions. Particularly preferably, the movement device also allows tilting or pivoting movements of the friction stir welding device with respect to the longitudinal axis of the rotation body.

Alternatively or additionally, a kinematically coupled to the cooling device second movement device, by means of which the cooling device is movable, can be provided. The second movement device may also be implemented as a manipulator of a robot, as a linear actuator system or the like. In particular, it can be provided that the second movement device is designed such that the cooling device with the friction stir welding device mitbewegbar or this is trackable. This is advantageous for cooling the shoulder device of Friction friction welding device by means of a separate cooling device allows this.

With respect to direction indications and axes, in particular to directions and axes which relate to the course of physical structures, herein is understood to mean a course of an axis, a direction or a structure "along" another axis, direction or structure, that these, in particular the tangents resulting in a respective position of the structures each extend at an angle of less than 45 degrees, preferably less than 30 degrees, and particularly preferably parallel to one another.

With respect to directional indications and axes, and in particular to directional data and axes concerning the course of physical structures, herein a progression of an axis, a direction or a structure is understood to be "transverse" to another axis, direction or structure, that In particular, the tangents resulting in a respective position of the structures each extend at an angle of greater than or equal to 45 degrees, preferably greater than or equal to 60 degrees, and particularly preferably perpendicular to one another.

In the following the invention will be explained with reference to the figures of the drawings. From the figures show:

1 a schematic view of a friction stir welding system according to a preferred embodiment of the present invention;

2 a detailed view of the area marked by the letter Z in the 1 shown Rührreibschweiß device of Rührreibschweiß system;

3 a schematic view of a friction stir welding system according to another embodiment of the present invention;

4 a detailed view of the area marked by the letter X in the 3 shown Rührreibschweiß device of Rührreibschweiß system;

5 a schematic view of a friction stir welding system according to another embodiment of the present invention;

6 a sectional view of a rotary body of a Rührreibschweiß apparatus according to another embodiment of the present invention; and

7 a schematic representation of an embodiment of a method according to the invention for operating a Rührreibschweiß device as a flowchart.

In the figures, the same reference numerals designate the same or functionally identical components, unless indicated otherwise.

1 shows an example of a friction stir welding system 100 with a friction stir welding device 1 , a heating device 50 and an optionally provided first movement device 71 ,

The friction stir welding device 1 has a body of revolution 10 , a shoulder device 30 and a control device 40 , In 1 is also an optional part of the friction stir welding device 1 provided drive device 20 shown.

The rotation body 10 is formed as an elongate body extending along a longitudinal axis L10 which is rotatable about the longitudinal axis L10, as in FIG 1 is indicated schematically by the arrow P10. In particular, the longitudinal axis L10 formed a central axis of the rotational body 10 out. The rotational body is preferred 10 designed as a cylindrical body. The rotation body 10 is at a first end area 11 to the drive device 20 coupled. In 1 is the rotation body 20 by way of example as to the drive device 20 shown coupled. A with respect to the longitudinal axis L10 opposite to the first end portion 11 located second end area 12 of the rotational body 10 is to contact with by means of Rührreibschweiß device 1 provided for connecting components. The second end area 12 In particular, one may be opposite one between the first and second end regions 11 . 12 extending main area 14 have a reduced diameter, as in 1 is shown by way of example.

The shoulder device 30 the friction stir welding device 1 has an end recess 31 on, through which the second end portion 12 of the rotational body 10 protrudes. In 1 is the shoulder device 30 by way of example as having a base body 33 in which the end recess 31 the shoulder device 30 is formed, shown running. As 1 shows, the base body 33 in particular be designed as a sleeve-shaped body having a peripheral wall 33A and a transversely extending to this end wall 33B having. The end recess 31 is here in the end wall 33B formed and extends between a first surface 33a and an opposite to this oriented second surface 33b the front wall 33B , This is especially out 2 seen. The second surface 33b the front wall 33B especially for Plant on by means of Rührreibschweiß device 1 be provided to be connected components (not shown). The second end area 12 of the rotational body 12 protrudes through the end recess 31 through and jump over the shoulder device 30 , in particular over the second surface 33a the front wall 33B same, before.

As in 2 is shown extending between the second end portion 12 of the rotational body 10 and the end recess 31 the shoulder device 30 A gap 32 , This has a gap width w32, which consists of a difference of an inner diameter d31 of the Endausnehmung 31 and an outer diameter d12 of the second end portion 12 of the rotational body 10 results. In a non-concentric arrangement of the second end region 12 of the rotational body 10 with respect to a central axis of the end recess 31 , the gap width w32 can in particular by a smallest distance between the second end portion 12 of the rotational body 10 and the end recess 31 the shoulder device 30 be defined.

1 further shows an example of a possible arrangement of the rotating body 10 , the optional drive device 20 and the shoulder device 30 in or on a housing 25 , The housing 25 Here, for example, is cylindrical, wherein at a first housing end portion 26 the shoulder device 30 and at one with respect to the longitudinal extent of the housing opposite to the first housing end portion 26 located second housing end portion 27 the drive device 20 is arranged. The rotation body 10 extends inside the case 25 , wherein the second end portion 12 of the rotational body 12 through the end recess 31 the shoulder device 30 protrudes through. 1 shows an example of a possible fixation of the shoulder device 30 on the housing 25 , In this case, the shoulder device 30 , in particular the peripheral wall 33A of the base body 33 , an internal thread, which with one at the first housing end portion 26 trained external thread is screwed.

As 1 shows by way of example, the control device 40 a first entrance 41 , a second entrance 43 , a first exit 42 and a control function F40. As in 1 is further shown, the control device 40 especially with a processor 45 and a memory readable by this 46 be educated. Preferably, the control function F40 is on the memory 46 saved, for example as a software program.

The first entrance 41 is configured to receive a rotation body temperature signal representing a rotational body temperature signal S41 as an input signal. This forms the first entrance 41 the control device 40 a first interface of the control device 40 , The first entrance 41 can in particular with a first temperature detection device, for example in the form of a first temperature sensor 15 to be functionally coupled. The first temperature detecting means is for detecting the temperature of the second end portion 12 of the rotational body 10 trained and insofar functionally associated with this. In 1 this is shown only schematically, in which the first temperature sensor 15 in the region of the second end region 12 of the rotational body 10 is drawn. The actual arrangement of the first temperature sensor 15 may be in the range of the second end region 12 of the rotational body 10 be realized. 6 shows an alternative, preferred arrangement of the second temperature sensor 15 , which will be described in more detail below. The functional coupling between the first input 41 and the first temperature detection device may be, for example, by means of an electrical wiring or wirelessly by means of a data transmission connection, wherein the temperature detection device comprises a transmitting unit and the first input 41 a receiving unit has to be realized. In 1 the functional coupling is schematic and exemplified by a connecting line between the first temperature sensor 15 and the first entrance 41 the control device 40 shown.

The second entrance 43 is designed to receive an actual temperature signal S43 as an input signal, wherein the actual temperature signal S43 is an actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 represents. This forms the second entrance 43 the control device 40 a second interface of the control device 40 , The second entrance 43 can in particular with a second temperature detection device, for example in the form of a second temperature sensor 16 to be functionally coupled. The second temperature detection device is for detecting the actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 trained and insofar functionally associated with this. In 1 this is shown only schematically, in which the second temperature sensor 16 in which the end recess 31 the shoulder device 30 surrounding area of the shoulder facility 30 is drawn. The actual arrangement of the second temperature sensor 16 can be realized in particular in this area. The functional coupling between the second input 43 and the second temperature detecting device may be, for example, by means of an electrical wiring or wirelessly by means of a data transmission connection, in which the Temperature detection device, a transmitting unit and the second input 43 a receiving unit has to be realized. In 1 is the functional coupling schematically and exemplarily by a connecting line between the second temperature sensor 16 and the second entrance 43 the control device 40 shown.

The first exit 42 the control device 40 is adapted to a temperature control signal S42 as an output signal for controlling the actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 provide. The temperature control signal S42 is given by the control function F40 on the basis of the rotational body temperature signal S41 and the actual temperature signal S43. In particular, the first output 42 with the heater 50 of the friction stir welding system 100 be coupled as schematically and exemplarily in 1 is shown. To control the actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 may be due to the temperature control signal S42, for example, due to a signal strength or a signal value, in particular a heating power of the heater 50 be set. The functional coupling between the first output 42 and the heater 50 or generally a functional of the shoulder device 30 associated temperature adjusting device, for example, by means of an electrical wiring or wirelessly by means of a data transmission connection, wherein the temperature-adjusting a receiving unit and the first output 42 a transmitting unit, be realized. In 1 the functional coupling is schematic and exemplified by a connecting line between the heating device 50 and the first exit 42 the control device 40 shown.

The preferred processor provided 45 is formed in particular for generating the temperature control signal S42. Of course, with the processor 45 also all other output signals of the control device described herein 40 be generated. Furthermore, the processor 45 also for processing at the entrances 41 . 43 receivable signals S41, S43 blanked.

The heater 50 the friction stir welding system 100 is at the first exit 42 the control device 40 coupled, as shown schematically in 1 is shown. The heater 50 is for adjusting the actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 intended. In particular, by an actuation of the heater 50 for example due to one of the first output 42 the control device 40 received temperature control signal S42, a widening of the inner diameter d31 of the inner recess 31 achieved.

At the in 1 friction stir welding system shown as an example 100 has the friction stir welding device 1 the heater 50 on. In particular, the heating device 50 as a the end recess 31 the shoulder device 30 be executed surrounding electrical conductor. The electrical conductor can, as in 1 shown by way of example in the cross section of the shoulder device 30 , in 1 in particular in the cross section of the end wall 33B be integrated. It is also conceivable that the electrical conductor at the end of the recess 31 defining inner surface 31a is arranged (not shown).

In the 1 schematically illustrated first movement device 71 is kinematically to the friction stir welding device 1 coupled. In 1 this is only an example by a coupling to the drive device 20 shown. Of course, a coupling of the first movement device 71 with the friction stir welding device 1 also about other components of the friction stir welding device 1 be realized, such as the housing 25 , In 1 is the first movement device 71 by way of example as a manipulator with several arms 71A . 71B . 71C shown.

That in the 3 and 4 shown embodiment of the friction stir welding system 100 is different from the one in the 1 and 2 shown embodiment only by the design of the shoulder device 30 , As in 3 is shown, the shoulder means 30 here the base body 33 and in addition an end plate 35 on. Unlike in the 1 and 2 shown shoulder device 30 is in the in the 3 and 4 shown shoulder device 30 the end recess 31 the shoulder device 30 in the end disk 35 educated. The base body 33 has a base body recess 34 on. Here, the second end region protrudes 12 of the rotational body 10 both through the base body recess 34 as well as through the end disc 35 trained end recess 31 therethrough. As in particular in 4 is shown, the base body recess 34 an inner diameter d34, which is preferably larger than the inner diameter d31 of the end recess 31 , The end disc 35 is mechanical to the base body 33 coupled and thereby fixed to this stationary. For example, the base body 33 and the end disc 35 glued, welded, screwed, riveted, locked or similarly fixed to each other. As in 3 shown, the end plate can 35 in particular be formed as a flat disc, which with a first surface 35a on the second surface 33b the front wall 33B of the base body 33 is applied. Furthermore, it can be provided that the end plate 35 has a roughly equal areal extent as the end wall 33B of the base body 33 as exemplified in 3 is shown. One opposite to the first surface 35a oriented second surface 35b the end plate 35 can in particular to invest in means of Rührreibschweiß device 1 be provided to be connected components (not shown).

As in 3 Furthermore, the heater can be shown 50 advantageous in the cross section of the end plate 35 be integrated. In particular, the heating device 50 as one in the end disc 35 trained end recess 31 be executed surrounding electrical conductor.

In 5 is a further advantageous design of the friction stir welding system 100 shown. Unlike the in 1 shown embodiment, the in 5 shown friction stir welding system 100 in addition to the heater 50 a cooling device 60 on. Furthermore, in 5 an optional second movement device 72 shown. As in 5 is further shown, the control device 40 in addition a second exit 44 on.

The cooling device 60 is for cooling the shoulder device 30 in which the end recess 31 surrounding area provided. In 5 is the cooling device 60 by way of example and schematically shown as a convection cooling device, by means of which a fluid flow to the shoulder device for cooling 30 , in particular to the Endausnehmung 31 , is transportable.

The cooling device 60 is at the second exit 44 the control device 40 coupled. The second exit 44 is configured to provide a cooling signal S44 as an output signal. The cooling signal S44 is predetermined by the control function F40 on the basis of the rotational body temperature signal S41 and the actual temperature signal S43. Basically, the second exit 44 for coupling with the cooling device 60 of the friction stir welding system 100 intended. In the embodiment shown in the figures, in which the friction stir welding device 1 shown as part of the friction stir welding system is the second output 44 to the cooling device 60 coupled. To control the actual temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 can due to the cooling signal S44, for example due to a signal strength or a signal value, in particular a cooling capacity of the cooling device 60 be set. The functional coupling between the second output 44 and the cooling device 60 For example, by means of an electrical wiring or wirelessly by means of a data transmission connection, in which the cooling device 60 a receiving unit and the second output 44 a transmitting unit, be realized. In 5 the functional coupling is schematic and exemplified by a connecting line between the cooling device 60 and the second exit 44 the control device 40 shown.

In the 5 schematically illustrated second movement device 72 is kinematically to the cooling device 60 coupled. In 5 is the second movement device 72 by way of example as a manipulator with several arms 72A . 72B . 72C shown. The second movement device 72 in particular, can be so functionally connected to the friction stir welding device 1 be coupled, that the second movement device 72 the cooling device 60 a movement of the friction stir welding device 1 nachnach accordingly. For example, it can be provided that a distance between the cooling device 60 and the friction stir welding device 1 , in particular the shoulder device 30 the friction stir welding device 1 , is kept constant.

In 6 is exemplary and schematically an advantageous integration of the first temperature sensor 15 in the friction stir welding device 1 shown. Here is the first temperature sensor 15 executed as a pyrometer. The in 6 in section shown rotating body 10 in this case preferably has a from the first end region 11 of the rotational body 10 from along the longitudinal axis L10 of the rotating body 10 to the second end area 12 of the rotational body 10 extending longitudinal recess 13 on. The pyrometer has a detector 15A for receiving through the second end region 12 of the rotational body 10 emitted heat radiation on. As in 6 shown is the detector 15A of the pyrometer of the recess 13 facing oriented, in particular along the longitudinal axis L10. In this way, the rotational body temperature can be determined without contact.

7 schematically shows a method for operating a friction stir welding device 1 as a flowchart. The method will be described below by way of example with reference to the above-described friction stir welding system 100 and the above-described friction stir welding apparatus 1 described.

As in 7 1, a detection M1 of a rotational body temperature value of the end portion is first performed 12 of the rotational body 10 the friction stir welding device 1 , This can be done, for example, by means of the first temperature sensor 15 respectively. This produces a temperature of the rotating body 10 representing rotational body Temperature signal S41, which at the first input 41 the control device 40 Will be received. Furthermore, detection M2 of an actual temperature value of the end recess takes place 31 the shoulder device 30 surrounding area of the shoulder facility 30 , This can be done, for example, by means of the second temperature sensor 16 This produces a temperature of the end recess 31 surrounding area of the shoulder facility 30 representing actual temperature signal S43, which at the second input 43 the control device 40 Will be received.

As in 7 Furthermore, on the basis of the detected rotational body temperature value and the detected actual temperature value Rules, an M3 of the temperature of the end recess is carried out 31 the shoulder device 30 surrounding area of the shoulder facility 30 to a dependent of the rotational body temperature value target temperature. For this purpose, a temperature control signal S42 is determined by means of the control function F40 and as an output signal at the first output 42 the control device 40 provided. By the temperature control signal S42, for example, the heater 50 to the first exit 42 coupled heating device 50 actuated.

As in 7 is shown schematically, the rules M3 the temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 a heating M3a, for example by means of the heater 50 as described above, or cooling M3b, for example by means of the cooling device 60 , of the end recess 31 the shoulder device 30 surrounding area of the shoulder facility 30 include.

7 further schematically shows a preferred process flow with respect to the regulation M3 of the temperature of the Endausnehmung 31 the shoulder device 30 surrounding area of the shoulder facility 30 , For this purpose, in a first step M3.1, a determination M3.1 of an actual outside diameter value of the second end region takes place 12 of the rotational body 10 from the detected rotational body temperature value by means of an outer diameter function, which indicates the outer diameter value as a function of the rotational body temperature value. Furthermore, a determination is made M3.2 of an actual inner diameter value of the Endausnehmung 31 from the detected actual temperature value by means of an inner diameter function, which the inner diameter value of the Endausnehmung 31 indicates as a function of the actual temperature value. In a further step, M3.3 is calculated of an actual gap width value of the gap 32 , Subsequently, in a further step M3.4, the actual gap width value is compared with a desired gap width value. Furthermore, a determination is made of M3.5 an inner diameter default value for the inner diameter d31 such that the target gap width value results. In a concluding step M3.6, the setpoint temperature is then determined from the inner diameter function.

As an alternative to this, the regulation M3 of the actual temperature may also merely be determining M3.7 of the setpoint temperature value of the end recess 31 surrounding area of the shoulder facility 30 as the detected rotational body temperature value, as shown schematically in FIG 7 is shown.

Generally, a non-volatile computer-readable memory 46 be provided, which stores a program which is adapted to cause a computer to carry out the method described above. In particular, the control device described above 40 the computer-readable memory 46 as memory. The program can be formed in particular by the control function F40. In particular, the computer can be controlled by the processor 45 the control device described above 40 be formed.

Although the present invention has been exemplified above by means of embodiments, it is not limited thereto, but modifiable in many ways. In particular, combinations of the preceding embodiments are conceivable.

LIST OF REFERENCE NUMBERS

1

Friction stir welding apparatus

10

body of revolution

11

first end area

12

second end area

13

Longitudinal recess of the rotating body

14

main area

15

first temperature sensor

15A

detector

16

second temperature sensor

20

driving means

25

casing

26

first end portion of the housing

27

second end portion of the housing

30

shoulder means

31

end recess

32

gap

33

base body

33A

Peripheral wall of the base body

33B

End wall of the base body

33a

first surface of the end wall

33b

second surface of the end wall

34

Basiskörperausnehmung

35

end disk

35a

first surface of the end plate

35b

second surface of the end plate

40

control device

41

first input of the control device

42

first output of the control device

43

second input of the control device

44

second output of the control device

45

processor

46

Storage

50

heater

60

cooler

71

first movement device

71A

poor

71B

poor

71C

poor

72

second movement device

72A

poor

72B

poor

72C

poor

100

Friction stir welding system

d12

Outer diameter of the second end region

d31

Inner diameter of the end recess

d34

Inner diameter of the base body recess

F40

control function

L10

longitudinal axis

M1

step

M2

step

M3

step

M3a

step

M3b

step

M3.1

step

M3.2

step

M3.3

step

M3.4

step

M3.5

step

M3.6

step

M3.7

step

P10

arrow

S41

Rotating body temperature signal

S42

Temperature control signal

S43

Actual temperature signal

S44

cooling signal

X

detail

Z

detail

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005030800 A1 [0002]
• DE 102014004331 B3 [0002]
• US 6516922 B1 [0003]

Claims (15)

Method for operating a friction stir welding device ( 1 ) comprising the following method steps: detecting (M1) a rotational body temperature value of a through an end recess ( 31 ) a shoulder device ( 30 ) of the friction stir welding device ( 1 ) protruding end region ( 12 ) of a rotational body ( 10 ) of the friction stir welding device ( 1 ); Detecting (M2) an actual temperature value of the end recess ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ); and based on the detected rotational body temperature value and the detected actual temperature value rules (M3) of the temperature of the end recess ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ) to a dependent of the rotational body temperature value target temperature. Method according to claim 1, wherein the regulation (M3) of the temperature of the end recess ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ) heating (M3a) or cooling (M3b) of the end recess ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ). A method according to claim 1 or 2, wherein the detection (M1) of the rotational body temperature value is effected by means of a pyrometer. Method according to one of the preceding claims, wherein the regulation (M3) of the temperature of the end recess ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ) further comprises the steps of: determining (M3.1) an actual outer diameter value of the second end region (M3.1) 12 ) of the rotating body ( 10 ) from the detected rotational body temperature value by an outer diameter function indicative of the outer diameter value as a function of the rotational body temperature value; Determining (M3.2) an actual inner diameter value of the end recess ( 31 ) from the detected actual temperature value by means of an inner diameter function, which the inner diameter value of the Endausnehmung ( 31 ) as a function of the actual temperature value; Calculating (M3.3) an actual gap width value of a between the Endausnehmung ( 31 ) and the second end region ( 12 ) of the rotating body ( 10 ) extending gap ( 32 ); Comparing (M3.4) the actual gap width value with a target gap width value; Determining (M3.5) an inner diameter default value for the inner diameter (d31) to give the target gap width value; and determining (M3.6) the target temperature from the inside diameter function. Method according to one of claims 1 to 3, wherein the rules (M3) of the actual temperature comprises determining (M3.7) of the target temperature value as the detected rotational body temperature value. Non-volatile computer readable memory ( 46 ) storing a program adapted to cause a computer to carry out a method according to any one of the preceding claims. Friction stir welding device ( 1 ) comprising: a rotating body rotatable about a longitudinal axis (L10) ( 10 ), which at a first end region ( 11 ) to a drive device ( 20 ) can be coupled; a shoulder device ( 30 ) with an end recess ( 31 ), by which a with respect to the longitudinal axis (L10) opposite to the first end region ( 11 ) of the rotating body ( 10 ) located second end region ( 12 ) of the rotating body ( 10 ) protrudes; and a control device ( 40 ) with a first input ( 41 ) which is adapted to receive as an input signal a rotational body temperature signal representing a rotational body temperature (S41), a second input ( 43 ) which is adapted to an an actual temperature of the Endausnehmung ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ) receive actual temperature signal (S43) as an input signal, and a first output ( 42 ), which is adapted to provide a due to the rotational body temperature signal (S41) and the actual temperature signal (S43) by a control function (F40) predetermined temperature control signal (S42) as an output signal for controlling the actual temperature. Friction stir welding device ( 1 ) according to claim 7, wherein the control device ( 40 ) a processor for generating the temperature control signal (S42) ( 45 ) and by this readable memory ( 46 ) on which the control function (F40) is stored. Friction stir welding device ( 1 ) according to claim 7 or 8, wherein said shoulder means ( 30 ) a base body ( 33 ), in which the end recess ( 31 ) of the shoulder device ( 30 ) is trained. Friction stir welding device ( 1 ) according to claim 7 or 8, wherein said shoulder means ( 30 ) a base body ( 33 ) in which a base body recess ( 34 ) is formed, and an end plate coupled thereto ( 35 ), in which the end recess ( 31 ) of the shoulder device ( 30 ) is formed. Friction stir welding system ( 100 ) comprising: a friction stir welding device ( 1 ) according to any one of claims 7 to 10; and one to the first output ( 42 ) of the control device ( 40 ) coupled heating device ( 50 ) for adjusting the actual temperature of the Endausnehmung ( 31 ) of the shoulder device ( 30 ) surrounding region of the shoulder device ( 30 ). Friction stir welding system ( 100 ) according to claim 11, wherein the heating device ( 50 ) as a the end recess ( 31 ) of the shoulder device ( 30 ) surrounding electrical conductor is executed. Friction stir welding system ( 100 ) according to claim 11 or 12, additionally comprising: a cooling device ( 60 ) for cooling the shoulder device ( 30 ) in which the end recess ( 31 ) surrounding area; the control device ( 40 ) additionally a second output ( 44 ) which is adapted to provide a cooling signal (S44) predetermined by the control function (F40) on the basis of the rotational body temperature signal (S41) and the actual temperature signal (S43) as an output signal; and the cooling device ( 60 ) to the second output ( 44 ) of the control device ( 42 ) is coupled. Friction stir welding system ( 100 ) according to one of the preceding claims, wherein the friction stir welding device ( 1 ) one to the first input of the control device ( 40 ) coupled first temperature sensor ( 15 ) having. Friction stir welding system ( 100 14), wherein the first temperature sensor ( 15 ) is designed as a pyrometer, wherein the rotational body ( 10 ) one of its first end region ( 11 ) along the longitudinal axis (L10) of the body of revolution ( 10 ) to the second end region ( 12 ) of the rotating body ( 10 ) extending longitudinal recess ( 13 ) and a detector ( 15A ) of the pyrometer of the recess ( 13 ) is arranged facing.

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