CN112296490A - Closed automatic welding head - Google Patents
Closed automatic welding head Download PDFInfo
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- CN112296490A CN112296490A CN202011100951.8A CN202011100951A CN112296490A CN 112296490 A CN112296490 A CN 112296490A CN 202011100951 A CN202011100951 A CN 202011100951A CN 112296490 A CN112296490 A CN 112296490A
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- closed shell
- head
- welding
- argon
- machine head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/321—Protecting means
Abstract
The invention discloses a closed automatic welding head, which comprises a closed shell for clamping a welded pipe fitting, a head arranged in the closed shell, a circulating water cooling system for cooling the head and an argon protection system for providing protective gas for welding, wherein the head comprises a travelling mechanism, and a tungsten electrode is arranged on the travelling mechanism; the circulating water cooling system is connected with the machine head through a machine head water inlet pipe and a machine head water outlet pipe and is provided with a temperature monitoring device for measuring the water temperature of the machine head water outlet pipe; the argon protection system is connected into the closed shell through an air inlet pipe and is provided with a gas flowmeter for measuring the inflow of argon. Compared with the prior art, the closed automatic welding head can measure the water temperature of the water outlet pipe of the welding head and the argon inflow flow in real time, realizes the protection of the welding head and a welding line, and greatly reduces the risk of equipment damage and the risk of generating unqualified welding lines.
Description
Technical Field
The invention belongs to the field of automatic welding, and particularly relates to a closed automatic welding head based on multiple closed-loop protection.
Background
With the development of automation control technology and the improvement of welding quality requirements, the self-melting automatic argon arc welding technology of thin-wall small tubes is widely applied to the fields of electric power, petrifaction, pharmacy, ships and the like. The self-melting automatic welding adopts a closed mechanism to realize the fixation of a machine head and a pipe fitting, a travelling mechanism, a tungsten electrode and the like realize the travelling and the formation of electric arc in a closed structural member, and the self-melting welding of a welding seam is realized under the protection of argon. Under the control of the controller, the tungsten electrode and the workpiece form electric arcs, the base metal is melted, and the connection between the workpieces is realized. Welding parameters of the closed automatic welding mainly comprise welding current, walking speed, protective gas flow and the like; the motor that closed automatic welder head relates to only walks the motor, and tungsten needle height and left and right sides position can not adjust in the welding process, only walks along the welding seam in pipe fitting week. Before welding, the height and the position between the tungsten electrode and the workpiece need to be adjusted, and then automatic welding can be carried out.
In the welding process of the closed automatic welding head, in order to increase the load capacity of the head, the head is generally cooled by cooling liquid, namely, the cooling of the head is realized through a cooling water circulation system, and the current load capacity of the head is increased. Meanwhile, in order to protect the molten pool and the tungsten electrode from being oxidized and ensure the welding forming quality, the whole closed mechanism is filled with argon to comprehensively protect the molten pool and the tungsten needle. Therefore, in the whole welding operation process, the protection system of the closed automatic welding head mainly comprises a circulating water cooling system and an argon protection system.
Because the closed automatic welding head has the characteristics that the welding seam and the tungsten electrode are completely closed in the head, a welding operator cannot observe the protection effect of argon on a molten pool and the tungsten electrode and the temperature condition of the whole head. Because the circulating water cooling system of the existing closed automatic welding head has no temperature monitoring device and state display, operators can not confirm whether the cooling system of the welding head runs reliably before and during welding of the closed automatic welding head and only listen to the sound generated when a water pump in the cooling system works, and when the water flow is low and the temperature of cooling water is higher than a set value, the rotating speed of the circulating water pump cannot be increased, so that the effective protection of the cooling water on the welding head is influenced; when the water temperature is continuously higher than the set value, no alarm prompt and welding emergency stop protection exist, the risk of equipment damage is increased, and the service life of the machine head is seriously influenced.
Meanwhile, because the argon protection system of the existing closed automatic welding head has no real-time flow display and state display, when the flow of argon is insufficient or the flow of argon is lower than a specified value due to the fact that an argon pipe is pressed in the welding process of the closed automatic welding head, the argon sprayed out of the head is insufficient to effectively protect a molten pool and a tungsten electrode, and the welding process is still carried out, so that the risk of generating unqualified welding seams is greatly increased.
In view of the above, it is necessary to provide a closed automatic welding head capable of solving the above problems.
Disclosure of Invention
The invention aims to: the closed automatic welding head is small in unqualified welding seam risk and long in service life.
In order to achieve the purpose, the invention provides a closed automatic welding head which comprises a closed shell for clamping a welded pipe fitting, a head arranged in the closed shell, a circulating water cooling system for cooling the head and an argon protection system for providing protective gas for welding, wherein the head comprises a travelling mechanism, and a tungsten electrode is arranged on the travelling mechanism; the circulating water cooling system is connected with the machine head through a machine head water inlet pipe and a machine head water outlet pipe and is provided with a temperature monitoring device for measuring the water temperature of the machine head water outlet pipe; the argon protection system is connected into the closed shell through an air inlet pipe and is provided with a gas flowmeter for measuring the inflow of argon.
As an improvement of the closed automatic welding head, the circulating water cooling system comprises a cooling water tank, a circulating water pump and the temperature monitoring device; the inlet of the circulating water pump is connected with the cooling water tank, the outlet of the circulating water pump is connected with a machine head water inlet pipe, and a machine head water outlet pipe is connected with the cooling water tank; the temperature monitoring device is installed in the cooling water tank and is located at the pipe orifice of the machine head water outlet pipe, and water temperature is measured in real time.
As an improvement of the closed automatic welding head, signals of a control circuit of the circulating water pump and a temperature monitoring device are connected into an automatic welding main controller, the automatic welding main controller is connected with a remote operation handle, a circulating water state signal is introduced into the remote operation handle, and a circulating water state is displayed in an interface of the remote operation handle; before welding, the remote operation handle is used for detecting water and checking the running condition of the circulating water cooling system; in the welding process, when the temperature of the cooling water is higher than a set value, the rotating speed of the circulating water pump is increased, the flowing speed of the cooling water in the machine head is accelerated, and the effect of reducing the temperature of the machine head is achieved; when the water temperature is continuously higher than a set value, an alarm prompt and welding emergency stop protection are set, and the risk of equipment damage is reduced.
As an improvement of the closed automatic welding head, the argon protection system comprises an argon bottle, an air inlet pipe, an electromagnetic valve and the gas flowmeter; the argon bottle is connected with the machine head in the closed shell through the air inlet pipe, the electromagnetic valve and the gas flowmeter are arranged on the air inlet pipe, and the electromagnetic valve is positioned at the upstream of the gas flowmeter; the electromagnetic valve controls the on-off of the argon.
The control circuit of the electromagnetic valve and the signal of the gas flowmeter are connected into the automatic welding main controller, the automatic welding main controller is connected with the remote operation handle, the argon flow numerical value signal and the state signal are introduced into the remote operation handle, and the argon flow numerical value and the state are displayed in the interface of the remote operation handle; before welding, the operation condition of an argon protection system is checked through a remote operation handle, the argon flow value is displayed timely, and the required value is reached by adjusting a pressure reducing valve on an argon bottle; in the welding process, when the argon flow is lower than a specified value, an alarm prompt and welding emergency stop protection are set so as to avoid continuously increasing the risk of unqualified welding seams.
As an improvement of the closed automatic welding head, the closed shell is provided with a through hole for clamping a part to be welded of a welded pipe fitting and an annular walking groove surrounding the circumference of the through hole; the traveling mechanism is arranged in the annular traveling groove of the closed shell and is driven by the traveling motor to travel to drive the tungsten electrode to move circumferentially along the annular traveling groove so as to weld the welded pipe fitting.
As an improvement of the closed automatic welding head, the closed shell comprises an upper closed shell and a lower closed shell, and half of the through hole and the annular walking groove are respectively arranged on the upper closed shell and the other half of the through hole and the annular walking groove are respectively arranged on the lower closed shell.
As an improvement of the closed automatic welding head, the closed shell further comprises clamping rings, and the clamping rings are arranged at two ends of the through holes of the upper closed shell and the lower closed shell and used for being tightly attached to a welded pipe fitting to realize sealing between the closed shell and the welded pipe fitting.
As an improvement of the closed automatic welding head, the closed shell further comprises clamping pieces, the upper closed shell and the lower closed shell are respectively provided with a clamping part, and the clamping pieces clamp the clamping parts of the upper closed shell and the lower closed shell to lock the upper closed shell and the lower closed shell.
As an improvement of the closed automatic welding head, the lower closed shell is provided with an external connection part, a head water inlet pipe and a head water outlet pipe both penetrate through the external connection part of the lower closed shell to be connected with a head in the closed shell, and the air inlet pipe penetrates through the external connection part of the lower closed shell to be connected into the closed shell.
Compared with the prior art, the closed automatic welding head can measure the water temperature of the water outlet pipe of the welding head and the argon inflow flow in real time, realizes the protection of the welding head and a welding line, and greatly reduces the risk of equipment damage and the risk of generating unqualified welding lines.
Drawings
The enclosed automatic welding head and the beneficial effects thereof of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic structural diagram of a closed automatic welding head according to the present invention.
FIG. 2 is another perspective view of the enclosed automatic welder head of the invention.
FIG. 3 is a schematic structural diagram of a circulating water cooling system of the closed automatic welding head of the present invention.
FIG. 4 is a schematic structural diagram of an argon shielding system of the closed automatic welding head of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, the automatic welding head of the present invention includes a sealed housing for holding the welded pipe, a head mounted in the sealed housing, a circulating water cooling system 10 for cooling the head, and an argon protection system 30 for providing a shielding gas for welding. The handpiece 50 includes a traveling mechanism 51 to which a tungsten electrode 52 is attached. Wherein, the circulating water cooling system 10 is connected with the machine head 50 through a machine head water inlet pipe and a machine head water outlet pipe, and is provided with a temperature monitoring device 16 for measuring the water temperature of the machine head water outlet pipe; the argon protection system 30 is connected into the closed housing through an air inlet pipe, and is provided with a gas flowmeter 36 for measuring the flow rate of the inlet argon.
The closed shell is provided with a through hole 540 for clamping the part to be welded of the welded pipe 70 and an annular walking groove 542 surrounding the circumference of the through hole 540. The traveling mechanism 51 is installed in the annular traveling groove 542 of the closed shell, and the traveling mechanism 51 is driven by the traveling motor to travel, so as to drive the tungsten electrode 52 to move circumferentially along the annular traveling groove 542, and weld the welding seam 72 of the welded pipe fitting 70.
The closed housing includes an upper closed housing 544, a lower closed housing 546, a clamping ring 548 and a clip 549. Half of the through hole 540 and the annular walking groove 542 are respectively arranged on the upper closed shell 544 and the other half is arranged on the lower closed shell 546, so that the closed shells can be conveniently installed on the welded pipe fitting 70. Clamping rings 548 are provided at both ends of the through hole 540 of the upper closed casing 544 and the lower closed casing 546 for tightly fitting the welded pipe 70 to seal the closed casings and the welded pipe 70. The upper closed type casing 544 and the lower closed type casing 546 are both provided with clamping portions, and the clamping pieces 549 clamp the clamping portions of the upper closed type casing 544 and the lower closed type casing 546 and lock the upper closed type casing 544 and the lower closed type casing 546. The lower closed shell 546 is provided with an external connection part, the handpiece water inlet pipe and the handpiece water outlet pipe both penetrate through the external connection part of the lower closed shell 546 to be connected with the handpiece 50 in the closed shell, and the air inlet pipe penetrates through the external connection part of the lower closed shell 546 to be connected into the closed shell.
When the automatic welding head is used, the clamping pieces 549 are loosened, the upper closed type shell 544 is opened, the welded pipe fitting 70 is placed into the through holes 540 and is tightly attached to the clamping rings 548 in a one-to-one correspondence mode, and then the upper closed type shell 544 is locked through the clamping pieces 549, so that the fixation of the closed type automatic welding head and the welded pipe fitting 70 can be achieved.
The circulating water cooling system 10 includes a cooling water tank 12, a circulating water pump 14, and a temperature monitoring device 16. The inlet of the circulating water pump 14 is connected with the cooling water tank 12, the outlet is connected with the water inlet pipe of the machine head, and the water outlet pipe of the machine head is connected back to the cooling water tank 12; the temperature monitoring device 16 is installed in the cooling water tank 12 and located at the nozzle of the head water outlet pipe, and measures the water temperature in real time. The control circuit of the circulating water pump 14 and the signal of the temperature monitoring device 16 are connected to the automatic welding main controller 80, the automatic welding main controller 80 is connected with the remote operation handle 90, the state signal of the circulating water is led into the remote operation handle 90, and the state of the circulating water is displayed in the interface of the remote operation handle 90.
Before the welding starts, the interface of the remote operation handle 90 can be operated to detect water, the circulating water pump 14 is controlled to work, and the state display- 'OK' is carried out; if the circulating water cooling system 10 cannot operate, the welding cannot be started to carry out normal welding, and a warning prompt of 'waterway blockage' is displayed in an interface of the remote operation handle 90.
In the welding process, if the temperature value measured by the temperature monitoring device 16 exceeds the set value, the automatic welding main controller 80 will make a judgment and send a signal to the circulating water pump 14 to increase the rotating speed, accelerate the flowing speed of the cooling water in the handpiece 50, and achieve the effect of reducing the temperature of the handpiece 50. When the cooling water temperature value measured by the temperature monitoring device 16 exceeds the set value for more than 1 minute, the automatic welding main controller 80 judges, sends out a protection signal, controls the automatic welding equipment to perform emergency stop operation, and displays an alarm prompt of 'overhigh head temperature' on the interface of the remote operation handle 90. When the water detection stopping operation is performed or the welding is stopped, the automatic welding main controller 80 controls the circulating water pump 14 to continue to work for 1-2 minutes and then stops rotating.
The argon shield system 30 includes an argon cylinder 32, a gas inlet tube, a solenoid valve 34, and a gas flow meter 36. An inlet tube connects the argon cylinder 32 with the handpiece 50 inside the closed housing, on which tube the solenoid valve 34 and the gas flow meter 36 are both located, and the solenoid valve 34 is located upstream of the gas flow meter 36. The electromagnetic valve 34 controls the on-off of the argon gas, and the gas flow meter 36 measures the flow rate of the argon gas. The control circuit of the electromagnetic valve 34 and the signal of the gas flowmeter 36 are connected to the automatic welding main controller 80, the automatic welding main controller 80 is connected to the remote operation handle 90, the argon gas flow value signal and the state signal are introduced into the remote operation handle 90, and the argon gas flow value and the state are displayed in the interface of the remote operation handle 90.
Before the welding starts, the interface of the remote operation handle 90 can be operated to detect the gas, the argon flow value is displayed timely, the required value is reached by adjusting the pressure reducing valve on the manual argon bottle 32, and the state display is OK; if the argon gas flow value is lower than the required value of the welding process, the welding can not be started to carry out normal welding, and an alarm prompt of 'gas circuit blockage' is displayed in the interface of the remote operation handle 90.
In the welding process, if the gas in the argon bottle 32 is insufficient or the gas inlet pipe is pressed, and the argon flow value is lower than the required value of the welding process, the automatic welding main controller 80 judges, sends out a protection signal, controls the automatic welding equipment to perform emergency stop operation, and displays an alarm prompt of 'insufficient argon' on the interface of the remote operation handle 90.
The specific implementation steps of welding by adopting the closed automatic welding head of the invention are as follows:
1) before welding, completing the connection and installation of automatic welding equipment; then, the setting of the welding process parameters is performed.
2) Before welding, the operations of 'water detection' and 'gas detection' are carried out.
When "examine water" operation, examine the water route state through "examining water" button on remote operation handle 90: if the waterway is not communicated, displaying a waterway communication alarm prompt in the interface of the remote operation handle 90, and at the moment, even if a welding start key is pressed, the welding can not be started to carry out normal welding; if the water path is through, "OK" is displayed in the interface of the remote manipulation handle 90.
When "examine gas" operation, through "examine gas" button on the remote operation handle 90, inspect the gas circuit state: if the gas circuit is not communicated, an alarm prompt of 'argon gas shortage' is displayed in the interface of the remote operation handle 90, and at the moment, even if a 'welding start' key is pressed, the welding can not be started to carry out normal welding; if the gas path is on, "OK" is displayed in the interface of the remote manipulation knob 90.
3) In the welding process:
if the temperature value of the cooling water measured by the temperature monitoring device 16 exceeds the set value, the automatic welding main controller 80 will judge to send a signal to the circulating water pump 14 to increase the rotating speed, accelerate the flowing speed of the cooling water in the handpiece 50, and achieve the effect of reducing the temperature of the handpiece 50. When the temperature value measured by the temperature monitoring device 16 exceeds the set value for more than 1 minute, the automatic welding main controller 80 judges, sends out a protection signal, controls the automatic welding equipment to perform emergency stop operation, and displays an alarm prompt of 'overhigh head temperature' in the interface of the remote operation handle 90;
if the gas in the argon bottle 32 is insufficient or the air inlet pipe is pressed, the argon flow value is lower than the welding process required value, the automatic welding main controller 80 judges, sends out a protection signal, controls the automatic welding equipment to carry out emergency stop operation, and displays an alarm prompt of 'insufficient argon' on the interface of the remote operation handle 90.
4) And after the welding is finished, disassembling the equipment and cleaning the site.
From the above description, it can be seen that the closed automatic welding head of the present invention has at least the following advantages:
(1) a temperature monitoring device, a state display device and a self-protection device are added in a circulating water cooling system of the closed automatic welding head. Before welding, "water detection" can be carried out so as to detect the operation condition of the circulating water cooling system; in the welding process, when the temperature of the cooling water is higher than a set value, the rotating speed of the circulating water pump is increased, the flowing speed of the cooling water in the machine head is accelerated, and the effect of reducing the temperature of the machine head is achieved; when the water temperature is continuously higher than a set value, an alarm prompt and welding emergency stop protection are set, and the risk of equipment damage is reduced.
(2) The argon protection system of the closed automatic welding head increases the real-time display, the state display and the self-protection setting of the argon flow. Before welding, gas detection can be carried out so as to conveniently detect the operating condition of an argon protection system, the argon flow value can be displayed timely, and the required value can be reached by adjusting a pressure reducing valve on a manual argon bottle; in the welding process, when the argon flow is lower than a specified value, an alarm prompt and welding emergency stop protection are set so as to avoid continuously increasing the risk of unqualified welding seams.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A closed automatic welding head comprises a closed shell for clamping a welded pipe fitting, a head arranged in the closed shell, a circulating water cooling system for cooling the head and an argon protection system for providing protective gas for welding, wherein the head comprises a travelling mechanism, and a tungsten electrode is arranged on the travelling mechanism; the method is characterized in that: the circulating water cooling system is connected with the machine head through a machine head water inlet pipe and a machine head water outlet pipe and is provided with a temperature monitoring device for measuring the water temperature of the machine head water outlet pipe; the argon protection system is connected into the closed shell through an air inlet pipe and is provided with a gas flowmeter for measuring the inflow of argon.
2. The enclosed automatic welder head of claim 1, characterized in that: the circulating water cooling system comprises a cooling water tank, a circulating water pump and the temperature monitoring device; the inlet of the circulating water pump is connected with the cooling water tank, the outlet of the circulating water pump is connected with a machine head water inlet pipe, and a machine head water outlet pipe is connected with the cooling water tank; the temperature monitoring device is installed in the cooling water tank and is located at the pipe orifice of the machine head water outlet pipe, and water temperature is measured in real time.
3. The enclosed automatic welder head of claim 2, characterized in that: signals of a control circuit of the circulating water pump and a temperature monitoring device are connected into an automatic welding main controller, the automatic welding main controller is connected with a remote operation handle, a circulating water state signal is introduced into the remote operation handle, and a circulating water state is displayed in an interface of the remote operation handle; before welding, the remote operation handle is used for detecting water and checking the running condition of the circulating water cooling system; in the welding process, when the temperature of the cooling water is higher than a set value, the rotating speed of the circulating water pump is increased, the flowing speed of the cooling water in the machine head is accelerated, and the effect of reducing the temperature of the machine head is achieved; when the water temperature is continuously higher than a set value, an alarm prompt and welding emergency stop protection are set, and the risk of equipment damage is reduced.
4. The enclosed automatic welder head of claim 1, characterized in that: the argon protection system comprises an argon bottle, an air inlet pipe, an electromagnetic valve and the gas flowmeter; the argon bottle is connected with the machine head in the closed shell through the air inlet pipe, the electromagnetic valve and the gas flowmeter are arranged on the air inlet pipe, and the electromagnetic valve is positioned at the upstream of the gas flowmeter; the electromagnetic valve controls the on-off of the argon.
5. The enclosed automatic welder head of claim 4, characterized in that: the control circuit of the electromagnetic valve and the signal of the gas flowmeter are both connected into an automatic welding main controller, the automatic welding main controller is connected with a remote operation handle, an argon flow numerical value signal and a state signal are introduced into the remote operation handle, and the argon flow numerical value and the state are displayed in an interface of the remote operation handle; before welding, the operation condition of an argon protection system is checked through a remote operation handle, the argon flow value is displayed timely, and the required value is reached by adjusting a pressure reducing valve on an argon bottle; in the welding process, when the argon flow is lower than a specified value, an alarm prompt and welding emergency stop protection are set so as to avoid continuously increasing the risk of unqualified welding seams.
6. The closed automatic welder head according to any of claims 1 to 5, characterized in that: the closed shell is provided with a through hole for clamping a part to be welded of a welded pipe fitting and an annular walking groove surrounding the circumference of the through hole; the traveling mechanism is arranged in the annular traveling groove of the closed shell and is driven by the traveling motor to travel to drive the tungsten electrode to move circumferentially along the annular traveling groove so as to weld the welded pipe fitting.
7. The enclosed automatic welder head of claim 6, characterized in that: the closed shell comprises an upper closed shell and a lower closed shell, wherein a half of the through hole and the annular walking groove are respectively arranged on the upper closed shell, and the other half of the through hole and the annular walking groove are arranged on the lower closed shell.
8. The enclosed automatic welder head of claim 7, characterized in that: the closed shell further comprises clamping rings, the clamping rings are arranged at two ends of the through holes of the upper closed shell and the lower closed shell and used for being tightly attached to the welded pipe fitting, and sealing between the closed shell and the welded pipe fitting is achieved.
9. The enclosed automatic welder head of claim 7, characterized in that: the closed shell further comprises a clamping piece, the upper closed shell and the lower closed shell are respectively provided with a clamping portion, and the clamping piece clamps the clamping portions of the upper closed shell and the lower closed shell to lock the upper closed shell and the lower closed shell.
10. The enclosed automatic welder head of claim 7, characterized in that: the lower closed shell is provided with an external connection part, the machine head water inlet pipe and the machine head water outlet pipe penetrate through the external connection part of the lower closed shell to be connected with a machine head in the closed shell, and the air inlet pipe penetrates through the external connection part of the lower closed shell to be connected into the closed shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011100951.8A CN112296490A (en) | 2020-10-15 | 2020-10-15 | Closed automatic welding head |
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| CN202011100951.8A CN112296490A (en) | 2020-10-15 | 2020-10-15 | Closed automatic welding head |
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| 曾平: "《船舶气体保护焊工艺设计与实作》", 28 February 2011, 哈尔滨工程大学出版社, pages: 236 - 238 * |
| 葛兆祥: "《焊接工艺及原理》", 30 November 1997, 中国电力出版社, pages: 178 - 183 * |
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