CN217412905U

CN217412905U - Welding gun sensing device and welding gun

Info

Publication number: CN217412905U
Application number: CN202220837833.3U
Authority: CN
Inventors: 孙爽
Original assignee: Panasonic Welding Systems Tangshan Co Ltd
Current assignee: Panasonic Welding Systems Tangshan Co Ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-09-13
Anticipated expiration: 2032-04-12

Abstract

The application provides a welder sensing device and welder, this welder sensing device includes: the welding gun head is detachably connected with the welding gun body; the probe is detachably and fixedly connected with the welding gun head; the probe is positioned on one side of the welding gun head, which is far away from the welding gun, and the welding gun head is in conductive communication with the probe. In the technical scheme, the detachable probe is arranged on the welding gun head, so that the welding line can be detected through the probe when the welding line is searched, and the detection precision is improved. In addition, after the re-detection is finished, the probe can be directly taken down from the welding gun head, so that the replacement cost is reduced.

Description

Welding gun sensing device and welding gun

Technical Field

The application relates to the technical field of welding equipment, in particular to a welding gun sensing device and a welding gun.

Background

The sensing form of the current robot welding gun mainly adopts welding wire sensing. The main characteristics of welding wire sensing are that stability is high, high-pressure sensing can be completed without other accessory equipment to find a welding seam, but because the integration level is high (directly integrated with the gun body), the welding wire sensing device is difficult to separate from the gun body so as to meet the requirements of different customers, when the welding wire sensing device corresponds to a customer who does not need high-pressure sensing, the expensive welding wire sensing device is difficult to separate, the cost of the whole product is high, and therefore, when the sensing device is aged and damaged, the welding wire sensing device is difficult to maintain and replace.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a welding gun sensing device and a welding gun, which are used for improving the precision of welding seam detection.

The application provides a welder sensing device, this welder sensing device includes: the welding gun head is detachably connected with the welding gun body; the probe is detachably and fixedly connected with the welding gun head; the probe is positioned on one side, away from the welding gun, of the welding gun head, and the welding gun head is in conductive communication with the probe. In above-mentioned technical scheme, through set up the detachable probe on welder head, when seeking the welding seam, accessible probe detection welding seam has improved the precision of surveying. In addition, after the re-detection is finished, the probe can be directly taken down from the welding gun head, so that the replacement cost is reduced.

In a specific practical embodiment, the welding gun further comprises a locking device, and the probe is detachably and fixedly connected with the welding gun head through the locking device.

In a specific possible embodiment, the probe comprises a support rod arranged in the welding gun head in a penetrating manner and a function rod used for detecting a welding position, and the support rod is fixedly connected with the function rod;

wherein,

and the support rod is provided with a limit groove matched with the locking device.

In a specific possible embodiment, the support rod is provided with a stop shoulder for abutting against the welding torch head.

In a specific possible embodiment, the locking device is a locking cylinder; the cylinder body of the locking cylinder is fixedly connected with the welding gun head; and the piston rod of the locking cylinder can be pressed against the limiting groove.

In a specific possible embodiment, the locking device is an elastic component arranged in the welding torch head, and the elastic component is in snap fit with the limiting groove.

In a specific possible embodiment, the welding gun head is provided with a sleeve for penetrating the probe; the locking device is an elastic clamping assembly arranged in the sleeve.

In a specific possible embodiment, the elastic clamping assembly comprises a first pressing bushing and a second pressing bushing which are fixed in the sleeve and are arranged in a stacked mode, and a butterfly reed positioned between the first pressing bushing and the second pressing bushing; wherein,

and the butterfly reed is in clamping fit with the probe.

The application also provides a welding gun, which comprises a welding gun body and any one of the welding gun sensors; and the welding gun head is detachably and fixedly connected with the welding gun body. In the technical scheme, the detachable probe is arranged on the welding gun head, so that the welding line can be detected through the probe when the welding line is searched, and the detection precision is improved. In addition, after the re-detection is finished, the probe can be directly taken down from the welding gun head, so that the replacement cost is reduced.

In a specific possible embodiment, the welding gun body is detachably and fixedly connected with the welding gun head through a welding gun joint.

Drawings

FIG. 1 is a schematic structural diagram of a torch sensing device according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a torch sensing device according to an embodiment of the present disclosure;

FIG. 3 is a partial cross-sectional view of a torch sensing device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a probe provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another torch sensing device according to an embodiment of the present disclosure;

FIG. 6 is a partial cross-sectional view of another torch sensing device provided in accordance with an embodiment of the present application;

fig. 7 is an enlarged view of a portion a in fig. 6.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

In order to facilitate understanding of the welding gun sensing device provided in the embodiment of the present application, an application scenario thereof is first described. The welding gun sensing device provided by the embodiment of the application is applied to robot welding equipment, the track of a welding seam needs to be determined before welding, and the robot controls the welding gun to weld along the track of the welding seam according to the track of the welding seam. The sensing device for determining the track of the welding seam is applied to robot welding equipment at present, so that the cost is high, and the embodiment of the application provides the welding gun sensing device for reducing the cost of the welding gun sensing device in use.

Firstly, a welding gun body is defined, in the embodiment of the application, a component including a welding gun head and the welding gun body is called a welding gun, and other structural components except the welding gun head in the welding gun are defined as the welding gun body.

Referring to fig. 1, fig. 1 shows a welding gun sensing device provided by an embodiment of the present application, which includes a welding gun head 10 and a probe 20. The torch head 10 is a structure for connecting the entire torch sensor device to the torch body. When the welding gun head is connected with the welding gun body, the welding gun head 10 is detachably and fixedly connected with the welding gun body. Illustratively, the torch head 10 is connected to the torch by a torch joint. When the welding gun is used, the welding gun head 10 is electrified after being connected with the welding gun through the welding gun joint, so that the whole welding gun head 10 is electrified. The probe 20 is detachably and fixedly connected with the welding gun head 10, and after the probe 20 is connected with the welding gun head 10, the probe 20 is also in conductive connection with the welding gun head 10. The probe 20 head may form a circuit for detecting a weld through the torch head 10, the torch joint, and the torch body. When the probe 20 detects the weld, the probe 20 is in conductive communication with the workpiece to be welded by moving the probe 20 to the weld position, and the weld position can be determined by detecting the current.

It should be understood that the above-mentioned welding gun body is charged by using a prior art charging method, and details are not described in the embodiments of the present application. When the welding gun head 10 is connected with the welding gun body through the welding gun connector and is electrically conductive, the structure of the welding gun head 10 correspondingly connected with the welding gun connector also adopts the existing connection mode, and the structure of the welding gun head 10 connected with the welding gun connector is not described in detail in the embodiment of the application. The welding gun sensing device provided by the embodiment of the application mainly aims at the connection structure of the welding gun head 10 and the probe 20, and the detailed description is given below by combining the specific drawings and the embodiment.

With continued reference to fig. 1, as an alternative, the main structure of welding gun head 10 includes a connecting seat 11 and a clamping seat 12 for clamping the welding wire. One end of the connecting base 11 is used for being detachably and fixedly connected with the welding gun connector, and the other end is used for fixing the clamping base 12. When the probe 20 is fixedly connected with the welding gun head 10, the probe 20 is located on one side of the welding gun head 10 departing from the welding gun, that is, the probe 20 and the clamping seat 12 are located on the same end of the connecting seat 11, and the probe 20 is detachably and fixedly connected with the connecting seat 11. Wherein, the connecting seat 11 can conduct electricity, and the probe 20 is connected with the connecting seat 11 in an electricity conduction way. When it is connected with the welding gun body through the welding gun joint, the probe 20 is conductively connected with the welding gun body through the connecting seat 11.

It should be understood that the welding torch head 10 described above includes the connecting seat 11 and the holding seat 12 as structures divided according to functions of different parts of the welding torch head 10, and the connecting seat 11 and the holding seat 12 may be integrally formed as a single structure or may be different single components, and the welding torch head 10 is formed by assembling. Of course, the welding gun head 10 provided in the embodiment of the present application may also be designed into other similar deformation structures according to actual needs, and the clamping of the probe 20, the welding wire, and the welding gun head 10 connected to the welding gun body may all be implemented in the embodiment of the present application. In the embodiment of the present application, a welding torch head 10 including a connecting seat 11 and a holding seat 12 is described as an example.

With continued reference to fig. 1, the torch sensing device further comprises a locking device 30, and when the probe 20 is fixedly connected to the torch head 10, the probe 20 is detachably and fixedly connected to the torch head 10 through the locking device 30. Specifically, when the welding gun head 10 comprises the connecting seat 11, the locking device is arranged on the connecting seat 11, the probe 20 can be inserted into the connecting seat 11, and the probe 20 is locked in the connecting seat 11 through the locking device 30. It will be appreciated that when the probe 20 is locked in the connector holder 11 by the locking means 30, the probe 20 is in abutting contact with the connector holder 11, thereby making the probe 20 in electrically conductive connection with the connector holder 11.

Referring to fig. 2 and 3 together, fig. 2 shows an exploded view of the torch sensing device, and fig. 3 shows a partial cross-sectional view of the torch sensing device.

When the probe 20 is mated with the connecting socket 11, the connecting socket 11 is provided with a through hole (not shown in the figure, the shape of the through hole can refer to the shape of the probe 20) for accommodating the probe 20, and the through hole extends along one end to the other end of the connecting socket 11. The through hole and the holder 12 are arranged side by side in the width direction of the connector holder 11. When the probe 20 is inserted into the through hole, the probe 20 is inserted from the through hole near the port of the holder 12, and then locked by the locking device 30.

The locking device 30 is located on one side of the connecting base 11, and the connecting base 11 is provided with a corresponding mounting hole (not shown, the shape of the mounting hole can refer to the shape of the locking device 30), which is communicated with the through hole for accommodating the probe 20, thereby forming a transverse T-shaped hole structure. When the locking device 30 is assembled in the mounting hole, the locking device 30 is used for locking one end of the probe 20 to be inserted into the through hole and pressed against the probe 20, so that the probe 20 is fixed.

For example, the locking device 30 may be a locking cylinder, and when assembled, a cylinder body of the locking cylinder is fixedly connected with the welding gun head 10, and a piston rod of the locking cylinder may abut against the limiting groove 23. Specifically, the cylinder body of the locking cylinder can be fixed in the mounting hole through interference fit, and the piston rod faces the through hole. When the probe 20 is installed in place, the piston rod of the locking cylinder can be controlled to extend out, and the piston rod is pressed against the probe 20, so that the probe 20 is fixed with the connecting seat 11. When the probe 20 needs to be disassembled, the piston rod of the locking cylinder is controlled to retract, the locking of the probe 20 is released, and the probe 20 can be taken down.

It should be understood that the locking device 30 provided in the embodiment of the present application may also be locked and unlocked by using a locking hydraulic cylinder or the like in addition to the locking cylinder.

In addition to the locking device 30 described above, embodiments of the present application provide for a resilient assembly disposed within the torch head 10 that is snap-fit to the probe 20. Specifically, the elastic assembly is arranged in the mounting hole and comprises a base fixed in the mounting hole, a pressing rod sliding with the base and a compression spring arranged between the pressing rod and the base, one end of the pressing rod is exposed out of the connecting seat 11, two ends of the compression spring are respectively pressed on the base and the pressing rod, the pressing rod is pushed by the elasticity of the compression spring to be inserted into the through hole and pressed on the probe 20 rod, and the locking of the probe 20 is realized. When it is desired to remove the probe 20, the locking of the probe 20 can be achieved by pulling the abutment bar outwards.

Referring to fig. 4, fig. 4 shows a structure of the probe, and the probe 20 provided in the embodiment of the present application mainly includes two structures, namely a support rod 24 and a function rod 21, where the support rod 24 is fixedly connected with the function rod 21. Wherein, the support rod 24 is used as a connecting structure and is arranged in the welding torch head 10 in a penetrating way and is locked; and the function lever 21 is used to contact with the work to be welded to perform a function of detecting the welding position.

It should be understood that, in the embodiment of the present application, the fixing connection between the supporting rod 24 and the function rod 21 can be implemented in different manners, for example, the supporting rod 24 and the function rod 21 are integrated, that is, the probe 20 is formed by integral casting, and the supporting rod 24 and the function rod 21 are different parts of the probe 20; or, the support rod 24 and the function rod 21 are of a separate structure, and the support rod 24 and the function rod 21 can be fixedly connected through welding, bonding or threaded connection.

The support rod 24 is provided as a structure which cooperates with the torch head 10, the support rod 24 being inserted into a through hole in the connecting socket 11 when assembled. In order to fix the probe 20, the supporting rod 24 is provided with a limiting groove 23 matched with the locking device 30. For example, when the locking device 30 is a locking cylinder or a locking hydraulic cylinder, a piston rod thereof may be pressed against the limiting groove 23, on one hand, the support rod 24 is pressed against and contacted with the connecting seat 11, so as to realize the fixation and conductive connection of the two; on the other hand, through the cooperation of spacing groove 23 and piston rod, can realize the spacing in probe 20 length direction, avoid appearing axial displacement. Similarly, when the locking device 30 is an elastic component, the elastic component is also pressed against the limiting groove 23, so that the probe 20 can be fixed.

Furthermore, in order to position the probe 20 when it is inserted into the connecting socket 11, a stop shoulder 22 is provided on the support bar 24 for pressing against the welding gun head 10. The stop shoulder 22 also serves as a dividing point between the support bar 24 and the function bar 21. During assembly, the support rod 24 is inserted into the through hole, when the limiting shoulder 22 is pressed against the connecting seat 11, the probe 20 is indicated to be assembled in place, and at the moment, the locking device corresponds to the limiting groove 23, so that the stability of the whole installation process is ensured.

The end of the function rod 21, which is away from the support rod 24 and serves as a part for contacting the workpiece, is pointed to ensure a small contact space with the workpiece. Of course, in the embodiment of the present application, a plurality of types of probes 20 may be provided, wherein the support rods 24 of different types of probes 20 have the same structure and size, but the functional rods 21 have different sizes, and the probe 20 with the functional rod 21 having a larger diameter may be provided, or the probe 20 with the functional rod 21 having a smaller diameter may be provided. When the welding seam is detected, the size of the welded piece can be detected according to actual needs, and the probes 20 of different models can be replaced, so that the welding seams of different sizes can be detected, and the adaptability of the welding gun sensing device is ensured.

During specific assembly, the welding gun head 10 is tightly connected with the welding gun body, the welding gun head 10 and the probe 20 are located in the circumferential direction through a through hole in the welding gun head 10, the probe 20 is moved to the position right below the through hole by the external gun cleaning wire cutting device and then moves upwards, axial location is achieved through a limiting convex shoulder 22 of the probe 20, after the probe 20 and the welding gun head 10 are located, a piston rod of a locking cylinder is ejected out of a limiting groove 23 of the probe 20 through starting of the locking cylinder which is located well with the welding gun head 10 through threads and steps, clamping of the probe 20 is achieved, the external gun cleaning wire cutting device is removed at the moment, and the high-pressure sensing position finding function of the welding gun sensing device can be achieved through electrifying.

Can see through the above-mentioned description, the utility model provides a welder sensing device has overcome the not enough in the current high pressure sensing form, and probe 20 accessible high accuracy machining technology adopts locking device to press from both sides tight location, can more accurate searching weld position. Thereby possessing the following advantages: 1. the cost is low: compared with the traditional welding wire clamping sensing mode, the nozzle sensing function can be realized only by replacing the relatively low-cost welding gun head 10 without adding a complex and expensive clamping mechanism on the welding gun body. 2. The precision is high: the wire clamping sensing mode has a certain degree of sensing position deviation due to the inherent wire bending problem, but the probe 20 does not sense the problem, and the detection by the probe 20 can improve the condition of inaccurate detection. 3. The accessibility is good: the extended length of the welding wire is 20-30mm, the welding wire cannot adapt to a too narrow welding seam form, and the sensing form of the probe 20 can be customized according to the requirement of a customer so as to adapt to different welding seams. 4. Quick replacement: the traditional welding wire clamping sensing mode is integrated in the gun body, when the welding wire clamping sensing mode needs to be replaced and maintained, a large amount of time is needed, the normal use of a welding gun is influenced, and the probe 20 sensing mode is convenient to replace quickly by only clamping the locking device 30 due to the fact that the probe is assembled on a nozzle of the welding gun.

Referring to fig. 5, fig. 5 shows another welding gun sensing device provided in the embodiment of the present application, which also includes a welding gun head 10 and a probe 20, and is different from the welding gun sensing device illustrated in fig. 1 in that the probe 20 is fixed in a different manner. This will be explained in detail below.

The welding gun head 10 provided by the embodiment of the present application includes a connecting seat 11 and a clamping seat 12, wherein the structure of the connecting seat 11 and the clamping seat 12 can refer to the corresponding description in fig. 1. The connecting socket 11 shown in fig. 5 differs from fig. 1 in that a sleeve 40 for inserting the probe 20 is provided on the welding torch head 10, i.e. the connecting socket 11 is provided with a sleeve 40 for inserting the probe 20, and the sleeve 40 can be fixedly connected to the connecting socket 11 by a screw connection. The locking device 30 is a resilient clamping assembly 50 disposed in the sleeve 40.

Referring to fig. 6 and 7 together, the number of the elastic clamping assemblies 50 is two, and the two elastic clamping assemblies 50 are stacked and arranged in the height direction of the sleeve 40. It should be understood that the number of the elastic clamping assemblies 50 provided in the embodiment of the present application is not limited to two, but may be three, four, etc. in different numbers. Each elastic clamping assembly 50 includes a first pressing bush 51 and a second pressing bush 53 stacked one on another, and a butterfly spring 52 located between the first pressing bush 51 and the second pressing bush 53.

Both the first pressing bush 51 and the second pressing bush 53 are fixed in the sleeve 40. Illustratively, the first compression bushing 51 and the second compression bushing 53 are secured within the sleeve 40 by an interference fit, or the first compression bushing 51 and the second compression bushing 53 are secured within the sleeve 40 by a threaded connection. In addition, the sleeve 40 is provided with a positioning step for positioning the first pressing bush 51 or the second pressing bush 53, ensuring that the first pressing bush 51 and the second pressing bush 53 can be fixed to the correct positions.

Butterfly spring 52 is fixed by first hold-down bushing 51 and second press bushing 53 when assembled, thereby defining the position of butterfly spring 52 within sleeve 40. The butterfly spring 52 is inclined with respect to the sleeve 40 in an upward inclination direction, that is, in an insertion direction of the probe 20. When the probe 20 is inserted into the sleeve 40, the probe 20 is inserted into the hollow portions of the two compression bushings, and the butterfly spring 52 is snap-fitted to the probe 20.

When the assembly is adopted, the probe 20 is clamped in the limiting groove 23 through the butterfly-shaped spring piece 52 towards the limiting groove 23 provided with the inclined downward direction, so that the positioning of the probe 20 is realized.

During integral assembly, the welding gun head 10 is tightly connected with the welding gun body, two butterfly-shaped reeds 52 are connected with the sleeve 40 through two groups of compression bushings, and the sleeve 40 is provided with an axial positioning step for axially positioning the compression bushings. The sleeve 40 and the pressing bushings can be in interference connection, a butterfly spring 52 is pressed between each group of pressing bushings, the opening directions of the springs are kept consistent, and the probe 20 can be conveniently pulled out from the upper end after penetrating from bottom to top. The sleeve 40 is screwed with the connecting seat 11 through threads, a limiting groove 23 which is matched with the inner diameter of the butterfly spring piece 52 in the radial direction is arranged on the probe 20, and the axial position and the radial position of the probe 20 are limited by pressing the butterfly spring piece 52 to generate deformation. Before the welding seam is detected, the probe 20 is inserted from the lower part through the gun cleaning and wire cutting device, and is clamped and positioned with the butterfly-shaped spring leaf 52 through the limiting groove 23, so that the installation is realized. After the welding seam is detected, the probe 20 is taken out from the upper part of the connecting seat 11 by the gun cleaning and wire cutting device, so that the welding process of the welding gun cannot be influenced.

When specifically surveying the welding seam, the welder sensing device who assembles, connect the welder body with it, later welding power supply, wire drive feed unit, welding equipment such as robot arm is connected, welding power supply is provided with the sensing return circuit that is used for probe 20 high pressure sensing, when needing high pressure sensing, switch-on high pressure sensing return circuit, let probe 20 pointed end load 500V's high-tension electricity, seek of welding seam through the locating procedure that the robot preset was set for, can record the robot position this moment through the break-make of signal of telecommunication when the surface contact of probe 20 pointed end and by the weldment, carry out the above-mentioned operation many times, record the position that the welding seam just can be found accurately to a plurality of positions.

As can be seen from the above description, the welding gun sensing device provided in the embodiments of the present application has: 1. the cost is low: compared with the traditional welding wire clamping sensing mode, the complex and expensive clamping mechanism does not need to be added on the welding gun body, and the nozzle sensing function can be realized only by replacing the relatively low-cost probe 20 component. 2. The precision is high: the wire clamping sensing scheme has a certain degree of sensing position deviation due to the inherent wire bending problem while the probe 20 does not sense this problem. 3. The accessibility is good: the extended length of the welding wire is 20-30mm, the welding wire cannot adapt to an excessively narrow welding seam form, and the sensing form of the probe 20 can be customized according to the requirement of a customer so as to adapt to different welding seams. 4. Quick replacement: the traditional welding wire clamping sensing mode is integrated in the gun body, when the welding wire clamping sensing mode needs to be replaced and maintained, a large amount of time is needed, the normal use of a welding gun is influenced, the probe 20 sensing mode is assembled on a nozzle of the welding gun, and the rapid replacement function can be realized only by replacing a sensing assembly of the probe 20.

The embodiment of the application also provides a welding gun, which comprises a welding gun body and any one welding gun sensor; wherein, welding gun head 10 and welder body detachable fixed connection. In the above technical scheme, by arranging the detachable probe 20 on the welding gun head 10, when a weld is searched, the weld can be detected through the probe 20, and after the weld is detected, the probe 20 can be directly taken down from the welding gun head 10, so that the replacement cost is reduced.

In a specific embodiment, the torch body is removably and fixedly connected to the torch head 10 by a torch joint. Thereby achieving a secure and electrically conductive connection between the probe 20 and the torch body.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience in describing and simplifying the present application, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. A welding gun sensing device, comprising: comprises a welding gun head detachably connected with a welding gun body; the probe is detachably and fixedly connected with the welding gun head; the probe is positioned on one side of the welding gun head, which is far away from the welding gun, and the welding gun head is in conductive communication with the probe.

2. The welding gun sensing device according to claim 1, further comprising a locking device, wherein the probe is detachably and fixedly connected with the welding gun head through the locking device.

3. The welding gun sensing device according to claim 2, wherein the probe comprises a support rod arranged in the welding gun head in a penetrating manner and a function rod for detecting a welding position, and the support rod is fixedly connected with the function rod; wherein,

4. The welding gun sensing device according to claim 3, wherein the support rod is provided with a limiting shoulder for abutting against the welding gun head.

5. The weld gun sensing device according to claim 4, wherein the locking device is a locking cylinder; the cylinder body of the locking cylinder is fixedly connected with the welding gun head; and the piston rod of the locking cylinder can be pressed against the limiting groove.

6. The welding gun sensing device according to claim 4, wherein the locking device is an elastic component arranged in the welding gun head, and the elastic component is in snap fit with the limiting groove.

7. The welding gun sensing device according to claim 2, wherein a sleeve for passing the probe is provided on the welding gun head; the locking device is an elastic clamping assembly arranged in the sleeve.

8. The weld gun sensing device according to claim 7, wherein the resilient clamping assembly includes first and second compression bushings secured within the sleeve and arranged in a stack, and a butterfly spring positioned between the first and second compression bushings; wherein,

and the butterfly reed is in clamping fit with the probe.

9. A welding gun, comprising a welding gun body and a welding gun sensing device according to any one of claims 1 to 8; and the welding gun head is detachably and fixedly connected with the welding gun body.

10. The welding gun according to claim 9, wherein the welding gun body is removably fixedly connected to the welding gun head by a welding gun joint.