Automatic welding equipment and welding system for circular weld joints

Abstract

The utility model provides automatic welding equipment and a welding system for a circular weld joint, and the automatic welding equipment for the circular weld joint comprises a carrier and a welding device. The carrier comprises a fixing seat and an inner core, the fixing seat is fixedly arranged and provided with a vertically-through fixing hole, the inner core is installed in the fixing hole in a rotatable and vertically-movable mode, and the rotating axis of the inner core is in the vertical direction. The welding device comprises a first driving device, a second driving device, a jacking piece and a welding gun; the first driving device is arranged below the carrier and is used for driving the inner core to rotate and lift; the second driving device is arranged above the carrier, and the jacking piece and the welding gun are installed on the second driving device. The second driving device is at least used for driving the jacking piece to ascend or descend and driving the gun head of the welding gun to be close to or away from a circular welding seam of the top end face of the cylindrical combined workpiece. According to the scheme, continuous automatic welding of the circular weld joints of the cylindrical combined workpiece can be achieved, the welding efficiency is improved, and the consistency of the quality of welded products is improved.

Description

Technical Field

[0001] This application relates to the technical field of welding of X-ray tubes. Specifically, it relates to an automatic welding device and a welding system for circular welds. Background Art

[0002] The cathode end of an X-ray tube generally includes a cathode component and an external ceramic shell. The cathode component generally has a cylindrical shape, and the ceramic shell is generally a cylindrical part. Both ends of the ceramic shell are made of metal. The cathode component is inserted into the ceramic shell, and a circular weld to be welded is formed at the ends of the two.

[0003] In the prior art, the tungsten inert gas (TIG) welding technique is generally used to weld the circular weld at the ends of the cathode component and the ceramic shell. However, most of the standard TIG welding equipment on the market currently is a manual TIG welding single machine, which requires welders to operate at close range, and the welding consistency highly depends on the proficiency of the welders, resulting in low production efficiency.

[0004] At the same time, the TIG welding has a large current density, emits relatively strong light, and the ultraviolet radiation generated by the arc is 5 - 30 times that of the ordinary shielded metal arc welding, and the infrared ray is about 1 - 1.5 times that of the shielded metal arc welding. The amount of ozone generated during welding is relatively high, and there is also a high-frequency electromagnetic field. If exposed to it for a long time, it will cause serious harm to the welder's body. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide an automatic welding device and a welding system for circular welds, which can realize the continuous automatic welding of the circular welds of cylindrical combined workpieces, improve the welding efficiency, and improve the consistency of the quality of welded products.

[0006] This application provides an automatic welding device for circular welds, which is used for welding the circular welds of cylindrical combined workpieces. The cylindrical combined workpieces include a cylindrical part and a cylindrical component. The cylindrical component is inserted into the cylindrical part, and a circular weld is formed at the end face.

[0007] Among them, the automatic welding device for circular welds includes a carrier and a welding device. The carrier includes a fixed seat and a core. The fixed seat is fixedly arranged and has a fixed hole penetrating up and down. The core is installed in the fixed hole in a rotatable and vertically movable manner, and the rotation axis of the core is vertical. The welding device includes a first driving device, a second driving device, a holding member, and a welding torch. The first driving device is arranged below the carrier and is used to drive the core to rotate and lift. The second driving device is arranged above the carrier, and the holding member and the welding torch are installed on the second driving device. Among them, the second driving device is at least used for: driving the holding member to rise or fall, and driving the tip of the welding torch to approach or move away from the circular weld at the top end face of the cylindrical combined workpiece.

[0008] During welding, the cylindrical combined workpiece is placed vertically in the fixed hole and supported by the inner core. The center of the bottom end of the holding member abuts against the center position of the top end face of the cylindrical combined workpiece, and the tip of the welding torch is close to the circular weld of the top end face of the cylindrical combined workpiece.

[0009] In an implementable solution, a fixture is installed at the output end of the first driving device. The first driving device is used to drive the fixture to rotate and lift, and the rotation axis is vertical. When the fixture is raised to the first height, it is inserted into the inner core, and when the fixture is lowered to the second height, it is disconnected from the inner core.

[0010] In an implementable solution, a mating hole is provided at the lower end of the inner core of the carrier, and the top end of the fixture is provided with a plug connector that mates with the mating hole. When the fixture is raised to the first height, the plug connector at the top end of the fixture is inserted into the mating hole; when the fixture is lowered to the second height, the plug connector at the top end of the fixture is disengaged from the mating hole. After the plug connector at the top end of the fixture is inserted into the mating hole, the inner core rotates with the rotation of the fixture; and after the plug connector at the top end of the fixture is inserted into the inner limit position of the mating hole, the inner core rises with the rise of the fixture.

[0011] In an implementable solution, a receiving hole extending downward is provided at the upper end of the inner core, and the size of the receiving hole is smaller than the outer diameter of the cylindrical part of the cylindrical combined workpiece.

[0012] In an implementable solution, the first driving device includes a first lifting mechanism and a rotating mechanism. The first lifting mechanism is arranged below the carrier, the rotating mechanism is installed on the first lifting mechanism, the first lifting mechanism drives the rotating mechanism to lift, and the fixture is installed at the output end of the rotating mechanism, and the rotating mechanism drives the fixture to rotate.

[0013] In an implementable solution, the second driving device includes a horizontal displacement mechanism and a second lifting mechanism. The horizontal displacement mechanism is arranged above the carrier, the second lifting mechanism and the welding torch are installed on the horizontal displacement mechanism, and the holding member is installed at the output end of the second lifting mechanism. During welding, the cylindrical combined workpiece is placed vertically in the fixed hole and supported by the inner core; when the displacement output of the horizontal displacement mechanism is at the first displacement position, the holding member installed at the lower part of the second lifting mechanism is located directly above the center position of the top end face of the cylindrical combined workpiece, and the tip of the welding torch is correspondingly located at the circular weld of the top end face of the cylindrical combined workpiece.

[0014] In an implementable solution, the welding device further includes a limiting member, which is also installed at the output end of the second lifting mechanism and is spaced from the holding member by a predetermined distance; the length of the limiting member is greater than the outer diameter of the cylindrical part. When the displacement output of the horizontal displacement mechanism changes from the first displacement position to the second displacement position, the holding member leaves directly above the center position of the top end face of the cylindrical combined workpiece, the limiting member is located above the top end face of the cylindrical combined workpiece, and the tip of the welding torch leaves the circular weld of the top end face of the cylindrical combined workpiece.

[0015] In an implementable solution, the downward end of the abutting member is a conical head.

[0016] In a second aspect, a welding system is provided, which is characterized by at least including a loading station, a welding station, and an unloading station, and further including a conveying device and the aforementioned circular weld automatic welding equipment. The circular weld automatic welding equipment is installed at the welding station; the conveying device is used to transfer the cylindrical combined workpiece to be welded from the loading station to the carrier of the circular weld automatic welding equipment at the welding station, and is also used to transfer the welded cylindrical combined workpiece from the carrier of the circular weld automatic welding equipment at the welding station to the unloading station.

[0017] In a third aspect, a welding system is provided, which is characterized by including a conveying device, and further including the aforementioned circular weld automatic welding equipment. One or more carriers of the circular weld automatic welding equipment are installed on the conveying device; during welding, the carrier carrying the cylindrical combined workpiece to be welded is conveyed by the conveying device to the welding device of the circular weld automatic welding equipment, and the carrier is positioned directly above the fixture.

[0018] Compared with the prior art, the beneficial effects of the present application at least include:

[0019] The circular weld automatic welding equipment of the present application can realize the continuous automatic welding of the circular weld of the cylindrical combined workpiece through the cooperation of the carrier and the welding device, greatly improving the welding efficiency of the circular weld of the cylindrical combined workpiece.

[0020] During the process of welding the circular weld, only by a worker or a manipulator placing the cylindrical combined workpiece in the carrier, and then the rotation of the cylindrical combined workpiece is driven by the first driving device of the welding device, and the gun head of the welding torch is driven by the second driving device to be adjusted to a position close to the circular weld, so that the process of welding the circular weld is completely separated from the welder, and there is no need for the welder to be in close contact with the welding torch. This not only keeps the welder away from the welding environment and protects the welder's body from the harm of high-frequency electromagnetic and high ozone, but also the automatic welding method can improve the consistency of the welding product quality, avoid relying on the welder's skills, and contribute to improving the welding quality and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1It is a first - perspective structure diagram of an automatic circular weld - ing device shown according to an embodiment of the present application;

[0023] Figure 2 It is a second - perspective structure diagram of an automatic circular weld - ing device shown according to an embodiment of the present application;

[0024] Figure 3 It is Figure 1 The structure diagram after removing the cylindrical combined workpiece from the circular weld - ing device in the middle - perspective view;

[0025] Figure 4 It is Figure 1 The semi - sectional structure diagram when the cylindrical part of the fixture bears the cylindrical combined workpiece;

[0026] Figure 5 The semi - sectional structure diagram of the fixture during the assembly of the cylindrical part and the cylindrical - shaped part;

[0027] Figure 6 The semi - sectional structure diagram of the fixture during the circular weld - ing of the cylindrical combined workpiece;

[0028] Figure 7 It is a partial structure schematic diagram of a welding system shown according to an embodiment of the present application.

[0029] In the figure: 1. Carrier; 11. Fixed seat; 111. Fixed hole; 12. Inner core; 121. Matching hole; 122. Accommodating hole; 2. Welding device; 21. First driving device; 211. Fixture; 2111. Plug connector; 212. First lifting mechanism; 213. Rotating mechanism; 22. Second driving device; 221. Horizontal displacement mechanism; 222. Second lifting mechanism; 23. Jacking part; 24. Welding torch; 25. Limiting part; 100. Cylindrical combined workpiece; 101. Cylindrical part; 102. Cylindrical - shaped part; 200. Conveying device. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] The embodiment of the present application first provides an automatic circular weld welding device for welding the circular welds of cylindrical combined workpieces. As Figures 4 to 6 shown in the figure, the cylindrical combined workpiece 100 includes a cylindrical part 101 and a tubular part 102. The cylindrical part 101 is inserted into the tubular part 102, and a circular weld to be welded is formed on one end face of the tubular part 102 and the cylindrical part 101, or circular welds to be welded are formed on both sides. For the assembly structure of the cathode part and the ceramic shell of the X-ray tube, after the cathode part is inserted into the ceramic shell, circular welds to be welded are respectively formed between the metal edges at both ends of the ceramic shell and the cathode part.

[0033] As Figure 1 shown in the figure, the embodiment of the present application first provides an automatic circular weld welding device, including a carrier 1 and a welding device 2.

[0034] Among them, as Figure 4 , Figure 5 and Figure 6 shown in the figure, the carrier 1 includes a fixed seat 11 and a core 12. The fixed seat 11 is fixedly arranged and has a fixed hole 111 penetrating up and down. The core 12 is installed in the fixed hole 111 in a rotatable and vertically movable manner, and the rotation axis of the core 12 is vertical.

[0035] It should be noted that the cylindrical part 101 and the tubular part 102 of the cylindrical combined workpiece 100 can be sequentially placed into the fixed hole 111 of the fixed seat 11 of the carrier 1 by means of an electric manipulator or manually, or the cylindrical part 101 and the tubular part 102 can be combined into the cylindrical combined workpiece 100 and then placed into the fixed hole 111.

[0036] As Figure 1 and Figure 2 shown in the figure, the welding device 2 includes a first driving device 21, a second driving device 22, a holding member 23 and a welding torch 24. Among them, the welding torch 24 is a TIG welding torch for implementing the welding process of TIG welding. The first driving device 21 is arranged below the carrier 1 for driving the core 12 to rotate and lift; the second driving device 22 is arranged above the carrier 1, and the holding member 23 and the welding torch 24 are installed on the second driving device 22. Among them, the second driving device 22 is at least used for: driving the holding member 23 to rise or fall, and driving the gun head of the welding torch 24 to approach or move away from the circular weld on the top end face of the cylindrical combined workpiece.

[0037] As Figure 2As shown, during welding, the cylindrical combined workpiece 100 is placed vertically in the fixing hole 111 and supported by the inner core 12. The center of the bottom end of the holding member 23 abuts against the center position of the top end face of the cylindrical combined workpiece 100, and the tip of the welding torch 24 is close to the circular weld on the top end face of the cylindrical combined workpiece 100. The first driving device 21 drives the inner core 12 to rotate, thereby driving the cylindrical combined workpiece 100 to rotate circumferentially, so that the circular weld passes through the position of the tip of the welding torch 24 in sequence, and thus the welding torch 24 completes the welding of the entire circular weld.

[0038] In summary, it can be seen that the automatic circular weld welding equipment of this embodiment can realize the continuous automatic welding of the circular weld of the cylindrical combined workpiece 100 through the cooperation of the carrier 1 and the welding device 2, greatly improving the welding efficiency of the circular weld of the cylindrical combined workpiece 100.

[0039] During the process of welding the circular weld, only need to place the cylindrical combined workpiece 100 in the carrier 1 by a worker or a manipulator, and then the rotation of the cylindrical combined workpiece 100 is driven by the first driving device 21 of the welding device 2, and the tip of the welding torch 24 is driven by the second driving device 22 to be adjusted to a position close to the circular weld, so that the process of welding the circular weld is completely separated from the welder, and there is no need for the welder to be in close contact with the welding torch. This not only keeps the welder away from the welding environment and protects the welder's body from the harm of high-frequency electromagnetic and high ozone, but also the automatic welding method can improve the consistency of the welding product quality, avoid relying on the welder's skills, and help to improve the welding quality and welding efficiency.

[0040] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, a fixture 211 is installed at the output end of the first driving device 21. The first driving device 21 is used to drive the fixture 211 to rotate and lift, and the rotation axis is vertical. When the fixture 211 rises to the first height, it is inserted into the inner core 12, so that the inner core 12 can rotate following the rotation of the fixture 211, and the rise of the fixture 211 can also drive the rise of the inner core 12. When the fixture 211 drops to the second height, it disconnects from the inner core 12.

[0041] In this embodiment, as Figure 4 、 Figure 5 and Figure 6As shown, a mating hole 121 can be provided at the lower end of the kernel 12 of the vehicle 1, and the top end of the fixture 211 is provided with a plug connector 2111 that mates with the mating hole 121. When the fixture 211 is raised to the first height, the plug connector 2111 at the top end of the fixture 211 is inserted into the mating hole 121; when the fixture 211 is lowered to the second height, the plug connector 2111 at the top end of the fixture 211 is disengaged from the mating hole 121. After the plug connector 2111 at the top end of the fixture 211 is inserted into the mating hole 121, the kernel 12 rotates with the rotation of the fixture 211; and after the plug connector 2111 at the top end of the fixture 211 is inserted into the mating hole 121 to the limit position, the kernel 12 rises with the rise of the fixture 211. The cross-sectional shape of the mating hole 121 can be a polygonal hole, an elliptical hole, etc.

[0042] In this embodiment, as Figure 4 、 Figure 5 and Figure 6 shown, a receiving hole 122 extending downward can be provided at the upper end of the kernel 12, and the size of the receiving hole 122 is smaller than the outer diameter of the cylindrical part 101 of the cylindrical combined workpiece 100. If the cylindrical combined workpiece 100 is the negative electrode end of an X-ray tube, since a lead is provided at one end thereof, the receiving hole 122 provides a receiving space for the lead, thereby preventing damage to the lead.

[0043] In this embodiment, as Figure 1 and Figure 3 shown, the first driving device 21 can include a first lifting mechanism 212 and a rotating mechanism 213. The first lifting mechanism 212 is provided below the vehicle 1, the rotating mechanism 213 is installed on the first lifting mechanism 212, the first lifting mechanism 212 drives the rotating mechanism 213 to lift, and the fixture 211 is installed at the output end of the rotating mechanism 213, and the rotating mechanism 213 drives the fixture 211 to rotate.

[0044] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, the second driving device 22 can include a horizontal displacement mechanism 221 and a second lifting mechanism 222. The horizontal displacement mechanism 221 is provided above the vehicle 1, the second lifting mechanism 222 and the welding torch 24 are installed on the horizontal displacement mechanism 221, and the abutting member 23 is installed at the output end of the second lifting mechanism 222. During welding, the cylindrical combined workpiece 100 is placed in the fixed hole 111 in a vertical posture and is supported by the kernel 12; when the displacement output of the horizontal displacement mechanism 221 is at the first displacement position, the abutting member 23 installed at the lower part of the second lifting mechanism 222 is located directly above the center position of the top end face of the cylindrical combined workpiece 100, and the tip of the welding torch 24 corresponds to the circular weld of the top end face of the cylindrical combined workpiece 100.

[0045] In this embodiment, the downward end of the holding member 23 can be a conical head. During welding, the bottom of the cylindrical combined workpiece 100 (the bottom ends of the cylindrical member 101 and the tubular member 102) is supported by the inner core 12, the holding member 23 abuts against the center position of the upper end face of the cylindrical member 101 from the top, and the rotating mechanism 213 of the first driving device 21 rotates to drive the cylindrical combined workpiece 100 to rotate. At this time, the welding torch 24 welds the circular weld at the top of the cylindrical combined workpiece 100.

[0046] In this embodiment, as Figure 2 shown, the welding device 2 may further include a limiting member 25, which is also installed at the output end of the second lifting mechanism 222 and is spaced from the holding member 23 by a predetermined distance; the length of the limiting member 25 is greater than the outer diameter of the tubular member. When the displacement output of the horizontal displacement mechanism 221 of the second driving device 22 changes from the first displacement position to the second displacement position, the holding member 23 moves away from directly above the center position of the top end face of the cylindrical combined workpiece, the limiting member 25 is located above the top end face of the cylindrical combined workpiece 100, and the tip of the welding torch 24 moves away from the circular weld at the top end face of the cylindrical combined workpiece 100.

[0047] Specifically, first, as Figure 4 shown, the cylindrical member 101 of the cylindrical combined workpiece 100 can be placed in the fixing hole 111 of the carrier 1 and supported by the inner core 12. Then, as Figure 5 shown, the tubular member 102 of the cylindrical combined workpiece 100 is then placed in the fixing hole 111 of the carrier 1 and on the cylindrical member 101. Next, the displacement output of the horizontal displacement mechanism 221 of the second driving device 22 is at the second displacement position, so that the limiting member 25 is directly above the tubular member 102, and the second lifting mechanism 222 lowers the limiting member 25 by a predetermined height. At the same time, the first lifting mechanism 212 of the first driving device 21 raises to lift the inner core 12. Under the limiting action of the upper limiting member 25 and the lifting action of the inner core 12, the cylindrical member 101 is pushed into the tubular member 102 to achieve the fitting of the cylindrical member 101 and the tubular member 102, and the cylindrical combined workpiece 100 to be welded is obtained. It can be seen that the setting of the limiting member 25 facilitates the automatic assembly of the cylindrical member 101 and the tubular member 102.

[0048] After the cylindrical combined workpiece 100 is automatically assembled, the displacement output of the horizontal displacement mechanism 221 of the second driving device 22 is at the first displacement position, the holding member 23 installed at the lower part of the second lifting mechanism 222 is directly above the center position of the top end face of the cylindrical combined workpiece 100, and the tip of the welding torch 24 correspondingly is at the circular weld at the top end face of the cylindrical combined workpiece. At this time, the second lifting mechanism 222 drives the holding member 23 to lower and abut against the center of the top end face of the cylindrical member 101. Then, as Figure 6As shown, the rotating mechanism 213 of the first driving device 21 rotates to drive the rotation of the kernel 12, and further drives the rotation of the cylindrical combined workpiece 100.

[0049] It should be noted that before the rotating mechanism 213 drives the kernel 12 to rotate, the welding torch 24 can first spot-weld the top circular weld of the cylindrical combined workpiece 100, and then drive the cylindrical combined workpiece 100 to rotate to achieve continuous welding of the circular weld. Spot welding can prevent relative rotation between the cylindrical part 101 and the cylindrical part 102, so as to prevent the relative rotation between the cylindrical part 101 and the cylindrical part 102 from affecting the welding quality.

[0050] The embodiment of the present application also provides a welding system, that is, an assembly line for welding circular welds, which at least includes a loading station, a welding station, and an unloading station, and also includes a conveying device and the aforementioned automatic circular weld welding equipment. The automatic circular weld welding equipment is installed at the welding station. The conveying device is used to transfer the cylindrical combined workpiece to be welded from the loading station to the carrier 1 of the automatic circular weld welding equipment at the welding station, and is also used to transfer the welded cylindrical combined workpiece from the carrier 1 of the automatic circular weld welding equipment at the welding station to the unloading station, so as to achieve automatic loading, automatic welding, and automatic unloading.

[0051] As Figure 7 shown, the embodiment of the present application also provides a welding system, including a conveying device 200, and also including the automatic circular weld welding equipment in the aforementioned solution. One or more carriers 1 of the automatic circular weld welding equipment are installed on the conveying device 200. During welding, the carrier 1 carrying the cylindrical combined workpiece 100 to be welded is conveyed by the conveying device 200 to the welding device 2 of the automatic circular weld welding equipment, and the carrier 1 is positioned directly above the fixture 211.

[0052] In this embodiment, as Figure 7 shown, the conveying device 200 can be disc-shaped, and the carrier 1 is installed around the edge of the disc-shaped structure. The cylindrical combined workpiece 100 is placed in the carrier 1, and the carrier 1 carrying the cylindrical combined workpiece 100 is sequentially conveyed to the automatic circular weld welding equipment through the rotation of the disc-shaped structure, so as to achieve the welding of the circular weld.

[0053] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An automatic circular weld welding device for welding the circular weld of a cylindrical combined workpiece. The cylindrical combined workpiece includes a cylindrical part and a cylindrical piece. The cylindrical piece is inserted into the cylindrical part to form a circular weld at the end face. It is characterized in that The automatic circular weld welding device includes: A carrier (1), including a fixed seat (11) and a core (12). The fixed seat (11) is fixedly arranged and has a fixed hole (111) penetrating up and down. The core (12) is installed in the fixed hole (111) in a rotatable and vertically movable manner. The rotation axis of the core (12) is vertical. A welding device (2), including a first driving device (21), a second driving device (22), a holding member (23) and a welding torch (24). The first driving device (21) is arranged below the carrier (1) for driving the core (12) to rotate and lift. The second driving device (22) is arranged above the carrier (1), and the holding member (23) and the welding torch (24) are installed on the second driving device (22). Wherein, the second driving device (22) is at least used for: driving the holding member (23) to rise or fall, and driving the tip of the welding torch (24) to approach or move away from the circular weld on the top end face of the cylindrical combined workpiece. During welding, the cylindrical combined workpiece is placed vertically in the fixed hole (111) and supported by the core (12). The center of the bottom end of the holding member (23) holds the center position of the top end face of the cylindrical combined workpiece, and the tip of the welding torch (24) approaches the circular weld on the top end face of the cylindrical combined workpiece.

2. The automatic circular weld welding equipment according to claim 1, characterized in that, A clamp (211) is installed at the output end of the first driving device (21). The first driving device (21) is used for driving the clamp (211) to rotate and lift, and the rotation axis is vertical. When the clamp (211) rises to the first height, it is inserted into the core (12). When the clamp (211) drops to the second height, it disconnects from the core (12).

3. The automatic circular weld welding equipment according to claim 2, characterized in that, A mating hole (121) is provided at the lower end of the core (12) of the carrier (1), and the top end of the clamp (211) is provided with a plug joint (2111) that mates with the mating hole (121). When the clamp (211) rises to the first height, the plug joint (2111) at the top end of the clamp (211) is inserted into the mating hole (121). When the clamp (211) drops to the second height, the plug joint (2111) at the top end of the clamp (211) disengages from the mating hole (121). After the plug joint (2111) at the top end of the clamp (211) is inserted into the mating hole (121), the core (12) rotates with the rotation of the clamp (211). And after the plug joint (2111) at the top end of the clamp (211) is inserted into the mating hole (121) to the limit position, the core (12) rises with the rise of the clamp (211).

4. The automatic circular weld seam welding equipment according to claim 2, characterized in that, The upper end of the core (12) is provided with a receiving hole (122) extending downward, and the size of the receiving hole (122) is smaller than the outer diameter of the cylindrical part of the cylindrical combined workpiece.

5. The circular weld automatic welding equipment according to claim 2, characterized in that, The first driving device (21) includes a first lifting mechanism (212) and a rotating mechanism (213); The first lifting mechanism (212) is arranged below the carrier (1), the rotating mechanism (213) is installed on the first lifting mechanism (212), the first lifting mechanism (212) drives the rotating mechanism (213) to lift, and the fixture (211) is installed at the output end of the rotating mechanism (213), and the rotating mechanism (213) drives the fixture (211) to rotate.

6. The automatic circular weld seam welding equipment according to claim 1, characterized in that, The second driving device (22) includes a horizontal displacement mechanism (221) and a second lifting mechanism (222); The horizontal displacement mechanism (221) is arranged above the carrier (1), the second lifting mechanism (222) and the welding torch (24) are installed on the horizontal displacement mechanism (221), and the holding member (23) is installed at the output end of the second lifting mechanism (222); During welding, the cylindrical combined workpiece is placed vertically in the fixing hole (111) and supported by the core (12); when the displacement output of the horizontal displacement mechanism (221) is at the first displacement position, the holding member (23) installed at the lower part of the second lifting mechanism (222) is located directly above the center position of the top end face of the cylindrical combined workpiece, and the tip of the welding torch (24) corresponds to the circular weld at the top end face of the cylindrical combined workpiece.

7. The automatic circular weld seam welding equipment according to claim 6, characterized in that, The welding device (2) further includes a limiting member (25), and the limiting member (25) is also installed at the output end of the second lifting mechanism (222) and is spaced from the holding member (23) by a predetermined distance; the length of the limiting member (25) is greater than the outer diameter of the cylindrical part. When the displacement output of the horizontal displacement mechanism (221) changes from the first displacement position to the second displacement position, the holding member (23) leaves directly above the center position of the top end face of the cylindrical combined workpiece, the limiting member (25) is located above the top end face of the cylindrical combined workpiece, and the tip of the welding torch (24) leaves the circular weld at the top end face of the cylindrical combined workpiece.

8. The automatic circular weld seam welding equipment according to claim 6, characterized in that The downward end of the holding member (23) is a tapered head.

9. A welding system, characterized in that, It at least includes a loading station, a welding station, and an unloading station, and further includes a conveying device and the circular weld automatic welding equipment according to any one of claims 1-8, and the circular weld automatic welding equipment is installed at the welding station; the conveying device is used to transfer the cylindrical combined workpiece to be welded onto the carrier (1) of the circular weld automatic welding equipment at the welding station, and is also used to transfer the welded cylindrical combined workpiece from the carrier (1) of the circular weld automatic welding equipment at the welding station to the unloading station.

10. A welding system, characterized in that, It includes a conveying device (200), and further includes a circular weld automatic welding device as described in any one of claims 2-5. A carrier (1) for one or more of the circular weld automatic welding devices is installed on the conveying device (200); during welding, the carrier (1) carrying the cylindrical combined workpiece to be welded is conveyed by the conveying device (200) to the welding device (2) of the circular weld automatic welding device, and the carrier (1) is positioned directly above the fixture (211).

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