CN116967661A

CN116967661A - Welding machine

Info

Publication number: CN116967661A
Application number: CN202310475249.7A
Authority: CN
Inventors: M·比登巴赫; N·洛兰
Original assignee: Gaztransport et Technigaz SA
Current assignee: Gaztransport et Technigaz SA
Priority date: 2022-04-29
Filing date: 2023-04-27
Publication date: 2023-10-31
Also published as: JP2023164416A; KR20230153958A; FR3135003A1

Abstract

The invention relates to a welding machine (1) of at least two parts (2) to be welded, configured to move along the parts (2) to be welded, the welding machine (1) comprising at least one moving assembly (10) comprising a pair of driving wheels (12) for moving the welding machine (1) relative to the parts (2) to be welded and at least one welding head (14) comprising at least two welding wheels (16) capable of welding the parts (2) to be welded by rolling against the parts (2) to be welded, the welding machine (1) comprising a control unit (30) of the welding head (14), the control unit (30) being capable of controlling parameters of the welding machine (1).

Description

Welding machine

Technical Field

The invention relates to a welding device comprising an electrode in the form of a welding wheel for welding together parts to be welded.

Background

Current welders include a drive wheel and a welding wheel that can weld the parts to be welded, and a drive member that can at least drive the drive wheel in rotation along the parts to be welded. During the movement of the welding machine, a current is supplied to the welding wheel by means of a current unit, ensuring the welding of the parts to be welded. Current welders are capable of following welding instructions entered by an operator prior to performing a welding method by the welder.

However, the current welder has a problem in that it does not allow continuous monitoring of welding instructions during the welding process, and thus cannot control parameters of the welder. Furthermore, current welders do not provide a period for directly correcting the welder parameters during the welding process and must be stopped each time a correction has to be made during the welding process.

Disclosure of Invention

The object of the present invention is therefore to propose a welding machine which is able to control the parameters of the welding machine continuously during the welding process and to ensure that the parameters of the welding machine are corrected automatically, at least in part, directly during the welding of the parts to be welded. The present invention therefore proposes a welding machine that is at least partially autonomous in terms of monitoring and control of the welding process.

The invention therefore relates to a welding machine for welding at least two parts to be welded, comprising at least one moving assembly and at least one welding head, the moving assembly comprising at least one pair of driving wheels for moving the moving assembly relative to the parts to be welded, the welding head comprising at least two welding wheels capable of producing a weld for securing the parts to be welded by rolling the welding wheels against the parts to be welded, the welding machine comprising a control unit for controlling the welding head, the control unit being capable of controlling parameters of the welding machine selected from the group consisting of: the contact pressure of the welding wheel against the part to be welded and/or the speed of movement of the moving component along the part to be welded and/or the intensity of the current through the welding wheel and/or the duration of the current pulse through the welding wheel and/or the position of the moving component relative to the part to be welded.

The welding machine according to the invention can be used to weld two raised edges together and/or with anchoring wings of a sealing film constituting the wall of a tank for storing and/or transporting cryogenic products such as liquefied natural gas.

For this purpose, the welding machine comprises at least one pair of driving wheels, which provide for the movement of the moving assembly along the part to be welded in a linear welding direction (also called the advancing direction of the welding machine) by means of a driving member controlled by a control unit. The drive member may be, for example, an electric, hydraulic, pneumatic or even a mechanical drive member. Preferably, the drive member in the context of the present invention is an electric motor.

The welding wheel may produce a weld, which may be at least one of a raised edge or an anchor flange, by contact with at least one part to be welded. More specifically, and according to a non-limiting example of the invention, when welding a part to be welded, movement of the welder relative to the part to be welded causes the welding wheel to rotate against the part to be welded, and the current supplied by the power supply unit and passing through the welding wheel makes it possible to form a weld on the part to be welded. The pressure of the welding wheel against the parts to be welded can be ensured by the pressurizing means controlled by the control unit. The pressurizing means may be, for example, a hydraulic cylinder.

Furthermore, the intensity of the current through the welding wheel is managed by a current transducer, which can be controlled by a control unit. The pulse time of the current is controlled by the control unit in combination with the transformer.

The position of the moving assembly relative to the parts to be welded can be ensured by a positioning member controlled by a control unit.

The function of the control unit of the welder is to at least partly control some parameters of the welder. The term "control" means that the control unit is able to process the information received in relation to said parameters, for example the values of said parameters, in order to ensure that they meet, on the one hand, the intended reference threshold values of these parameters and, on the other hand, to adjust these values, if necessary, so that they converge towards said reference threshold values. An advantage of such a control unit is therefore that it is itself able to monitor and adjust the welder parameters in an at least partly autonomous manner.

It will also be appreciated that the measurement of the pulses of current through the welding wheel is performed when the current is injected into the welding wheel. Each pulse is defined by two values, the first value corresponding to the maximum current intensity flowing through the welding wheel and the second value corresponding to the minimum current intensity flowing through the welding wheel. Thus, the current pulses through the welding wheel correspond to the alternation of these maximum current intensities and these minimum current intensities. It should be noted that these pulses still produce a continuous weld.

The duration of the welding wheels having their maximum strength is called hot time, while the duration of the welding wheels having their minimum strength is called cold time.

The minimum intensity is lower than the maximum intensity. Preferably, the minimum intensity is non-zero.

According to a preferred example, the minimum intensity value is equal to 10% of the maximum intensity. This feature makes it possible to optimize the energy required to produce a continuous weld.

According to a feature of the invention, the control unit is able to receive values of different parameters of the welding machine in order to control them.

It will be appreciated that the control unit receives values of different parameters of the welding machine in order to process them and allow monitoring of said parameters of the welding machine.

According to a feature of the invention, the welding machine comprises at least one control interface capable of displaying at least the values of the different parameters of the welding machine.

It will be appreciated that the control unit receiving the values of the parameters of the welding machine sends the values to the control interface, allowing the operator to directly monitor the parameters of the welding machine during the welding process.

According to one feature of the invention, the control interface is an input member of reference thresholds for different parameters of the welding machine.

It will be appreciated that the control interface can integrate the reference threshold values entered by the operator and transmit them to the control unit so that the control unit can process the received parameter values associated with the respective reference threshold values entered by the operator in the control interface.

According to a feature of the invention, the welding machine comprises at least one cooling device for cooling the welding head, the control unit being able to control parameter values of the cooling device.

The welding wheel cooling device comprises an internal circuit for circulating a cooling liquid as close as possible to the welding wheel, the circuit further comprising a tank and a pump.

According to one feature of the invention, the parameters of the cooling device comprise at least one of the following parameters: the flow rate of the cooling liquid circulating in the welding machine and/or the temperature of the cooling liquid.

According to one feature of the invention, the welding machine comprises first determining means able to detect the value of a parameter related to the contact pressure of the welding wheel against the part to be welded, and/or second determining means able to detect the value of a parameter related to the speed of movement of the moving assembly along the part to be welded, and/or third determining means able to detect the value of a parameter related to the intensity of the current through the welding wheel, and/or fourth determining means able to detect the value of a parameter related to the position of the moving assembly relative to the part to be welded, and/or fifth determining means able to detect the value of a parameter related to the duration of the current pulse through the welding wheel.

The determining means may be, for example, a sensor that determines the value of a different parameter, or a device that determines the value of a parameter from another parameter measured elsewhere. It will be appreciated that the determining means makes it possible to detect parameter values for subsequent transmission to the control unit for processing them by the control unit.

According to one feature of the invention, the welding machine comprises a carriage remote from the mobile assembly and connected thereto by means of a wire harness, the control unit being carried by the mobile assembly or the carriage.

The carriage of the welder is used to carry certain elements of the welder, such as a tank of a cooling device or a power supply unit and a control interface. According to a preferred embodiment of the invention, the control unit is carried by a moving assembly of the welding machine.

According to a feature of the invention, the mobile assembly comprises at least one electrical converter. The converter comprises in particular a rectifier bridge, a capacitor and an inverter, and in particular makes it possible to convert a 50Hz alternating current supplied by the power supply unit of the welding machine into a 1000Hz alternating current, in order to deliver it to a transformer/rectifier which converts the 1000Hz alternating current into a pulsed current delivered to the welding wheel.

According to one feature of the invention, the electrical converter and the control unit are carried by the same printed circuit board. It should be appreciated that according to a preferred embodiment, the printed circuit board supporting the converter and the control unit is carried by the moving assembly of the soldering machine.

According to a feature of the invention, the control of the parameter and/or the reception of the parameter value is carried out continuously between the starting position of the mobile component and the arrival position of the mobile component.

In other words, the control of the parameters and/or the reception of the parameter values is carried out continuously during the entire process of welding the parts to be welded.

The invention also relates to a method for controlling the welding of at least two parts to be welded by a welding machine according to any of the preceding features, said welding control method comprising at least:

an input step of inputting a reference threshold value of at least a first parameter of the welding machine in the control interface;

a receiving step of receiving, by the control unit, at least one measured value of a first parameter of the welding machine;

a comparison step of comparing, by the control unit, at least one measured value of the first parameter with a reference threshold value of the first parameter;

and controlling at least one of the parameters of the welding machine by the control unit if there is no convergence between the measured value of the first parameter and the reference threshold value of the first parameter.

It is understood here that according to a first alternative, the control unit is able to modify the first parameter such that the next measured value of said first parameter converges with the reference threshold value of the first parameter. Furthermore, according to a second alternative, the control unit can modify a parameter different from the first parameter such that the next measured value of the first parameter converges with the reference threshold value of the first parameter.

According to one feature of the invention, the control step comprises a step of adjusting at least one parameter of the welding machine during the welding process of the parts to be welded, so that the measured value of the first parameter converges with a reference threshold value of the first parameter. In other words, it should be understood that the control unit is able to autonomously correct the failure of at least one parameter of the welding machine in order to converge the next measured value of a first parameter with a reference threshold value of said first parameter.

According to one feature of the invention, the control step comprises a stopping step of stopping the welding of the parts to be welded when at least one measured value of the first parameter deviates from a reference threshold of the first parameter by more than 5% to 20%.

It will be appreciated that when the value of the measured parameter becomes too far from the reference threshold, the control unit stops the welding method, for example, to provide a correction by the operator.

According to a feature of the invention, the method is carried out continuously between a starting position of the mobile assembly and an arrival position of said mobile assembly.

According to one feature of the invention, the control unit records the detected values of the different parameters during the receiving step.

Drawings

Other features, details and advantages of the invention will become apparent from the following description, when read in conjunction with the accompanying drawings, in which:

FIG. 1 is a general perspective view of a tank for storing and/or transporting cryogenic products, the tank comprising at least two parts to be welded that make up a sealing membrane of the tank;

FIG. 2 is a perspective view of a welder according to the present invention capable of welding the two weld parts of FIG. 1;

fig. 3 is a flow chart of the steps of a method for controlling welding of parts to be welded by a welder according to the present invention.

Detailed Description

It should be noted at the outset that although the drawings illustrate in detail the practice of the invention, these drawings may, of course, be used to better define the invention (as applicable). It should also be noted that these figures illustrate only exemplary embodiments of the invention. Finally, like reference numerals refer to like elements throughout the several views.

Fig. 2 shows a welding machine 1 configured to move along at least two parts 2 to be welded. More specifically, the parts 2 to be welded constitute a sealing membrane 4 of a wall 6 of a tank 8 for storing and/or transporting cryogenic products (for example liquefied natural gas), visible in fig. 1.

The welder 1 comprises at least one moving assembly 10, which is substantially parallelepiped in shape and extends along a main extension direction P parallel to the longitudinal direction L of the welder 1. The moving assembly 10 of the welding machine 1 is intended to move along the part 2 to be welded and for this purpose comprises at least one pair of driving wheels 12, the driving wheels 12 being intended to move the welding machine 1 relative to the part to be welded. More specifically, the driving wheels 12 are arranged in contact with the parts 2 to be welded by means of a pressing device 13 (e.g. a hydraulic cylinder), and the driving members (not visible) make it possible to drive them in rotation against the parts to be welded, so as to move the moving assembly 10 of the welding machine 1. The drive member may be, for example, an electric, hydraulic, pneumatic or even a mechanical drive member. Preferably, the drive member in the context of the present invention is an electric motor. According to the illustrated example of the invention, the moving assembly 10 of the welding machine 1 comprises two pairs of driving wheels 12, which pairs of driving wheels 12 are arranged opposite each other in the main extension direction P of the moving assembly 10.

The mobile assembly 10 further comprises a welding head 14, the welding head 14 comprising at least two welding wheels 16, the welding wheels 16 being able to produce a weld for fixing the parts to be welded by rolling said welding wheels 16 against the parts to be welded. In the illustrated example of the invention, the welding head 14 is arranged between two pairs of driving wheels 12 in the main extension direction P of the moving assembly 10. The welding head 14 further comprises at least one pressurizing device 15 for pressurizing the welding wheel 16 against the part 2 to be welded, the pressurizing device 15 being able to take the form of, for example, a hydraulic cylinder.

The welding machine 1 further comprises at least one cooling device 18 for cooling at least the welding head 14. More specifically, the cooling device 18 includes an internal circuit (not visible) that circulates the cooling fluid as close as possible to the welding wheel 16, and the cooling device 18 also includes a coolant tank 20, a pump, and a cooling unit (not visible). Such a cooling device 18 is capable of avoiding overheating of the welding wheel 16, in particular during operation of the welding machine 1.

The welder 1 also includes a bracket 34 remote from the mobile assembly 10 and connected thereto by a wire harness 24. The wiring harness 24 includes, among other things, the electrical and hydraulic connections required to operate the mobile assembly 10. The carrier 22 is particularly configured to carry the components of the welder 1, such as the power supply unit 26 of the welder 1, as well as the tank 20, pump and refrigeration unit of the cooling device 18.

The function of the power supply unit 26 is in particular to supply current at least to the driving members of the driving wheels 12, thereby driving them in rotation to move the moving assembly 10 of the welding machine 1; and delivers current to the welding wheel 16 to enable welding of the part 2 to be welded when current is passed through the welding wheel 16. Further, the current from the power supply unit 26 is an alternating current. Thus, the welding machine 1 comprises an electrical converter 28, hereinafter referred to as converter, arranged in the current path between the power supply unit 26 and the welding wheel 16, the converter 28 enabling to convert the 50Hz alternating current of the power supply unit 26 into the 1000Hz alternating current required by the welding wheel 16. The converter comprises in particular at least one rectifier bridge, a capacitor and an inverter. The current at the converter output is directed to a transformer/rectifier that converts the 1000Hz ac current into a pulsed current that is sent to the welding wheel 16.

According to the invention, the welding machine 1 comprises a control unit 30 for the welding head 14, the control unit 30 being able to control parameters of the welding machine 1 selected from: the contact pressure of the welding wheel 16 against the part 2 to be welded and/or the speed of movement of the moving assembly 10 along the part 2 to be welded and/or the intensity of the current through the welding wheel 16 and/or the position of the welder 1 relative to the part 2 to be welded. It will be appreciated that the control unit 30 is able to control at least the pressurizing means for pressurizing the driving members of the welding wheel and/or the driving wheel 12, and/or the intensity of the current delivered by the power supply unit 26, and/or to determine the position of the welding machine 1 with respect to the parts 2 to be welded, depending on the speed of advance thereof.

The term "control" refers to the control unit 30 being able to process the values of the different parameters of the welding machine 1 it receives, to allow the operator to monitor the welding method continuously between the starting position of the mobile assembly 10 and the arrival position of the mobile assembly 10 of the welding machine 1 at the part 2 to be welded. The starting position is understood to be the position of the moving assembly 10 on the part 2 to be welded where it is desired to start welding, while the reaching position is understood to be the position of the moving assembly 10 on the part 2 to be welded where it is desired to end welding. Such a position of the moving assembly 10 is determined by a positioning member as part of the welding machine, optionally on the moving assembly 10, which member is controlled by a control unit 30.

According to the invention, the control unit 30 is carried by the mobile assembly 10 or by the carriage 22 of the welding machine 1. According to a preferred embodiment of the invention, the control unit 30 is carried by the mobile assembly 10.

Furthermore, according to an example of the invention, the transducer 28 is carried by the mobile assembly 10 of the welding machine 1. More specifically, the transducer 28 and the control unit 30 are carried by the same printed circuit board carried by the mobile assembly 10.

According to an example of the invention, the control unit 30 is able to control parameter values of the cooling device 18. More specifically, the parameters of the cooling device 18 include at least one parameter from the flow rate of the cooling liquid circulating in the welding machine 1 and/or the temperature of said cooling liquid.

According to the invention, the control unit 30 is able to receive values of different parameters from the welding machine 1 it is able to control. More specifically, the welding machine 1 comprises at least a first determining means 32a and/or a second determining means 32b and/or a third determining means 32c and/or a fourth determining means 32d and/or a fifth determining means 32e, the first determining means 32a being able to detect the value of a parameter related to the contact pressure of the welding wheel 16 against the part 2 to be welded, the second determining means 32b being able to detect the value of a parameter related to the speed of movement of the moving assembly 10 along the part 2 to be welded, the third determining means 32c being able to detect the value of a parameter related to the intensity of the current through the welding wheel 16, the fourth determining means 32d being able to detect the value of a parameter related to the position of the welding machine 1 relative to the part to be welded, the fifth determining means 32e being able to detect the value of a parameter related to the duration of the current pulse through the welding wheel 16.

The determining means 32a, 32b, 32c, 32d, 32e are, for example, sensors configured to detect parameter values, such as the contact pressure exerted by the pressing device 15 of the welding wheel 16 and/or the rotational speed of the drive wheel 12 and/or the current intensity flowing in the welding wheel 16 and/or the position of the welding machine 1 relative to the part to be welded and/or the current pulse duration through the welding wheel 16. The determining means 32a, 32b, 32c, 32d, 32e may also be a device capable of determining the value of one of the parameters from another parameter measured elsewhere. For example, one of the determining means 32d may be a device capable of determining the position of the moving assembly 10 relative to the part 2 to be welded, based on the speed value of the moving assembly 10 detected by one of the sensors and the starting position relative to the moving assembly 10.

The welding machine 1 may further comprise sixth determination means 32f, which may be used for detecting a value related to the flow rate of the cooling liquid circulating in the welding machine 1, and/or seventh determination means 32g, which are provided in the tank 20, which may be used for detecting the temperature of said cooling liquid. More specifically, the sixth determination means 32f makes it possible to determine the rotation speed of the pump.

The determining means 32a, 32b, 32c, 32d, 32e, 32f, 32g may then transmit at least one measured value of at least one of the parameters to the control unit 30 for processing as described above. The method of controlling welding by the control unit will be described in the following detailed description.

According to the invention, the welder 1 comprises at least one control interface 34 capable of displaying at least the values of the different parameters of the welder 1 received by the control unit 30. More specifically, according to one example of the invention, the control interface 34 is carried by the carriage 22 and allows an operator to track changes in parameters of the welder 1 during the welding process. The control interface 34 also allows the operator to input reference thresholds for different parameters of the welding machine 1, i.e. predetermined values and/or predetermined intervals for each parameter of the welding machine 1. The term "reference threshold" refers to a value and/or interval of values that the operator expects for different parameters of the welding machine 1 during the welding process. According to another not shown example of the invention, the control interface may be carried by a portable device separate from the cradle.

As is apparent from the above, the control interface 34 and the control unit 30 can communicate with each other, so that the control interface 34 can display the value received by the control unit 30, and so that the control unit 30 can process the received value related to the reference threshold value input in the control interface 34.

A method of controlling welding of at least two parts by the welding machine 1 according to the present invention will now be described with reference to fig. 2 and 3.

The control method comprises at least one input step 100, corresponding to the step of the operator inputting in the control interface 34 a reference threshold value of at least one parameter of the welding machine 1. According to one example of the invention, the operator inputs a reference threshold set of all parameters of the welder 1. Thus, once the reference thresholds are entered, they are communicated by the control interface 34 to the control unit 30. It will then be appreciated that the control unit 30 uses the reference threshold value entered into the control interface 34 as the desired value or interval of values for each parameter of the welding machine 1. It should also be appreciated that the control unit 30 and the control interface 34 are configured to communicate with each other.

The control method further comprises a receiving step 200 after the inputting step 100, during which the control unit 30 receives parameter values detected by the determining means 32a, 32b, 32c, 32d, 32e, 32f, 32g from the welding machine 1.

Subsequently, the control unit 30 is able to perform a comparison step 300 of comparing at least one value of at least one parameter received by one of the above-mentioned determination devices 32a, 32b, 32c, 32d, 32e, 32f, 32g with a reference threshold value for said value. In other words, the control unit 30 receives values detected by the different determination devices 32a, 32b, 32c, 32d, 32e, 32f, 32g successively from the welding machine 1 and compares these received values with the reference threshold value input for each parameter.

Furthermore, according to the invention, the values received by the control unit 30 are also transmitted to the control interface 34 to allow operator monitoring. According to an example of the invention, the control interface 34 is able to record the values received by the control unit 30, thus constituting a database of said parameter values of the welding machine 1.

Once the comparison step 300 is performed, the control unit 30 optionally performs a step 400 of checking at least one parameter of the welder 1 if it is determined that the value received by at least one of the devices 32a, 32b, 32c, 32d, 32e, 32f, 32g does not converge with a reference threshold value of said parameter. In other words, when the comparison step 300 ends, in case there is a deviation between the parameter value received by the control unit 30 and the previously input reference threshold value, the control unit 30 performs the control step 400, and more specifically the adjustment step 401 of adjusting the control step 400, during which the control unit 30 corrects the parameter and/or at least one other different parameter such that the next received value of the parameter converges towards the input threshold value of said parameter. It should be appreciated that this control step 400 is applicable to all parameters of the welder 1.

Furthermore, it must be understood that from this adjustment step 401, the correction of one of the parameters may comprise the adjustment of a different one of the parameters. For example, in case the current intensity through the welding wheel is to be corrected so as to be closer to its input threshold value, the control unit adjusts the current intensity directly at the output of the power supply unit.

In other words, the input threshold value input for each parameter is fixed. The adjusting step is performed in such a way that there is convergence between the input threshold value entered and the measurement performed in the parameter. The adjusting step may involve one or more parameters of the welder.

According to a use example of the control method, when the received value of the at least one parameter deviates from the reference threshold value, for example, by the duration of the current pulse of the welding wheel 16 deviating more than 5% from the reference threshold value and/or the contact pressure of said welding wheel 16 deviating more than 20% from the reference threshold value, the control unit 30 executes a stop step 402 of stopping the control step 400, during which the control unit 30 stops the welding of the parts to be welded by the welding machine 1. In other words, when the received value of the parameter is too far from the reference threshold value to be adjusted during the adjustment step 401, the control unit 30 stops the welding of the parts to be welded, so that the operator can manually correct one or more parameters of the welding machine 1, or can perform a maintenance control operation of the welding machine. The maintenance operation may be, for example, cleaning the welding wheels and/or the driving wheels if they become jammed.

It will also be appreciated that when the comparison step 300 results in a received parameter value matching a reference threshold value for the parameter, the control unit 30 does not make any modification to the parameter and resumes the control method in the receiving step 200.

Therefore, once the control step 400 or the comparison step 300 is performed, the control unit 30 repeats the control method starting from the reception step 200 when the reference threshold value of the parameter of the welder 1 is unchanged. In case the reference threshold of the parameter needs to be modified, the method repeats starting from the input step 100.

According to one example of the invention, during the adjustment step 401 and the stop step 402 of the control step 400, the control interface 34 indicates to the operator the implementation of these steps 401, 402 by means of signals (e.g. audible and/or visual signals).

It will also be appreciated that the control method is continued between the starting position of the mobile assembly 10 and the reaching position of said mobile assembly 10. This continuity of the control method ensures an optimal monitoring of the welding method of the parts 2 to be welded, thus ensuring a better welding quality.

The invention just described, however, is not limited to the devices and arrangements specifically described and illustrated, but is also applicable to all equivalent devices or arrangements and any combination of such devices or arrangements.

Claims

1. A welding machine (1) for at least two parts (2) to be welded, the welding machine (1) comprising at least one moving assembly (10) comprising at least one pair of driving wheels (12) and at least one welding head (14) for moving the moving assembly (10) relative to the parts (2) to be welded, the welding head comprising at least two welding wheels (16) capable of producing a weld for fixing the parts (2) to be welded by rolling of the welding wheels (16) against the parts (2) to be welded, the welding machine (1) comprising a control unit (30) of the welding head (14), the control unit (30) being capable of controlling parameters of the welding machine (1) selected from: -contact pressure of the welding wheel (16) against the part (2) to be welded, and/or-speed of movement of the moving assembly (10) along the part (2) to be welded, and/or-current intensity through the welding wheel (14), and/or duration of current pulses through the welding wheel (14), and/or-position of the moving assembly (10) relative to the part (2) to be welded; and the control unit (30) is able to receive values of different parameters from the welding machine (1) in order to control these different parameters.

2. The welder (1) of claim 1, comprising at least one control interface (34) capable of displaying at least values of different parameters of the welder (1).

3. The welding machine (1) according to claim 2, wherein the control interface (34) is a means for inputting reference thresholds for different parameters of the welding machine (1).

4. A welding machine (1) according to any one of claims 1 to 3, comprising at least one cooling device (18) of the welding head (14), the control unit (30) being able to control parameter values of the cooling device (18).

5. The welding machine (1) according to claim 4, wherein the parameters of the cooling device (18) comprise at least one parameter from the flow rate of the coolant flowing in the welding machine (1) and/or the temperature of the coolant.

6. Welding machine (1) according to any one of claims 1 to 5, comprising first determining means (32 a) able to detect the value of a parameter related to the contact pressure of the welding wheel (16) against the part (2) to be welded, and/or second determining means (32 b) able to detect the value of a parameter related to the speed of movement of the moving assembly (10) along the part (2) to be welded, and/or third determining means (32 c) able to detect the value of a parameter related to the intensity of the current through the welding wheel (16), and/or fourth determining means (32 d) able to detect the value of a parameter related to the position of the moving assembly (10) relative to the part (2) to be welded, and/or fifth determining means (32 e) able to detect the value of a parameter related to the duration of the current pulse through the welding wheel (16).

7. The welding machine (1) according to any one of claims 1 to 6, comprising a carriage (22) remote from the moving assembly and connected thereto by a wire harness (24), the control unit (30) being carried by the moving assembly (10) or the carriage (22).

8. The welding machine (1) according to any one of claims 1 to 7, wherein the moving assembly (10) comprises at least one electrical converter (28).

9. The soldering machine (1) according to claim 8, wherein the electrical converter (28) and the control unit (30) are carried by the same printed circuit board.

10. The welding machine (1) according to any one of claims 1 to 9, wherein the control of the parameter and/or the reception of the parameter value is performed continuously between a starting position of the moving assembly (10) and an arrival position of the moving assembly (10).

11. A control method of controlling welding of at least two parts (2) by a welding machine (1) according to any one of claims 1 to 10, the control method comprising at least:

an input step (100) of a reference threshold value of at least one first parameter of the welder (1) in a control interface (34);

a receiving step (200) of at least one measured value of a first parameter of the welder (1) by a control unit (30);

a comparison step (300) of comparing, by the control unit (30), at least one measured value of the first parameter with a reference threshold value of the first parameter;

a control step (400) of controlling at least one parameter of the welding machine (1) by the control unit (30) if there is no convergence between the measured value of the first parameter and the reference threshold value of the first parameter.

12. The control method according to claim 11, wherein the checking step (400) comprises an adjustment step of adjusting (401) at least one parameter of the welder (1) when welding the parts to be welded (2) so that the measured value of the first parameter converges to a reference threshold value of the first parameter.

13. The control method according to claim 11 or 12, wherein the checking step (400) comprises a stopping step (402) of stopping welding the part (2) to be welded when at least one measured value of the first parameter deviates from a reference threshold value of the first parameter by more than 5% to 20%.

14. The control method according to any one of claims 11 to 13, wherein the control method operates continuously between a starting position of the moving assembly and an arrival position of the moving assembly (10).