A device and method for laser cleaning of vacuum electroslag furnace electrode rods under protective atmosphere

Abstract

The present invention provides a device and method for laser cleaning of electrode rods of a vacuum electroslag furnace under a protective atmosphere. The device comprises a lifting mechanism, a top platform, a copper electrode rod, a laser system, a protective cover, a moving trolley, a furnace head bracket, a laser power supply, a guide rod argon supply system and a rotating drive mechanism. The laser system consists of a laser power supply and a laser gun head. The laser power supply is installed on the moving trolley. The laser gun head is fixed to the upper part of the protective cover. The entire protective cover is installed on the moving trolley. The device and method designed and provided by the present invention mainly utilize the principle of instantaneous laser cleaning and timely purging of inert gas argon, so as to achieve the purpose of thorough cleaning. The cleaning work under the argon protective environment can effectively prevent the risk of oxidation of the surface of the copper electrode rod during laser cleaning, protect the surface of the copper electrode rod, and is conducive to improving the service life of the copper electrode rod.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to a device and method for laser cleaning an electrode rod of a vacuum electroslag furnace under a protective atmosphere. Background Art

[0002] The vacuum electroslag furnace is used for the smelting and production of special alloys such as high-temperature alloys, special steels, and high-strength steels. Due to the use of pre-melted slag during the smelting process, the dust and dirt of the electroslag volatilized during the smelting absorb moisture and adhere to the copper electrode rods, which often makes the cleaning and maintenance of the copper electrode rods of the electroslag furnace difficult. Usually, the treatment method of wiping and then polishing is used, but this traditional cleaning method can easily damage the surface structure of the electrode rod. Uneven polishing and cleaning will lead to deterioration of surface roughness and overall cylindricality. As the service life and the number of cleaning times increase, it will cause the vacuum seal to deteriorate, and the metallurgical quality of the products smelted by the vacuum electroslag furnace cannot be guaranteed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a device and method for laser cleaning of vacuum electroslag furnace electrode rods under a protective atmosphere.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device and method for laser cleaning of electrode rods of a vacuum electroslag furnace under a protective atmosphere, the device comprising a lifting mechanism, a top platform, a copper electrode rod, a laser system, a protective cover, a moving trolley, a furnace head bracket, a laser power supply, a guide rod argon supply system and a rotating drive mechanism, the laser system consisting of a laser power supply and a laser gun head, the laser power supply is installed on the moving trolley, the laser gun head is fixedly mounted on the upper part of the protective cover, and the entire protective cover is installed on the moving trolley.

[0005] As a preferred embodiment, the laser system consists of a laser power supply and a laser gun head. The laser power supply is installed on a mobile trolley. The laser gun head is fixed to the upper part of the protective cover. The entire protective cover is installed on the mobile trolley.

[0006] As a preferred embodiment, the movable carriage can be moved into or out of the position below the copper electrode rod, and the movable carriage is equipped with a laser system, a rotary drive mechanism and a protective cover.

[0007] As a preferred embodiment, the rotary drive mechanism is a gear meshing mechanism, including a rotary motor, a gear, a base and a protective cover installed on the gear structure, and can rotate around the electrode rod as the gear meshes and rotates.

[0008] As a preferred embodiment, the rotary motor in the rotary drive mechanism is a stepping angular displacement motor, which can perform cyclic output rotation within the range of -180° to +180° according to a preset value, driving the gear to perform rotational motion within the range of -180° to +180°.

[0009] As a preferred embodiment, the protective cover is provided with an air inlet A and an air outlet B, which are respectively connected to the argon gas supply system; the air inlet A is arranged near a position just below the laser gun head.

[0010] As a preferred embodiment, the argon supply system is a closed-loop circulation system with the functions of inhaling, filtering, storing, and pressurizing and outputting argon gas. The outlet A and the inlet B are respectively connected to the inlet A and the outlet B on the protective cover with hoses.

[0011] As a preferred implementation, the copper electrode rod can move up and down under the action of the top lifting mechanism, the protective cover can rotate under the action of the rotating mechanism, and the laser gun head is assembled on the protective cover.

[0012] As a preferred embodiment, the connecting hose between the protective cover and the argon gas supply system, and the power line of the laser gun head pass through and are led out from the middle channel.

[0013] A method for laser cleaning of vacuum electroslag furnace electrode rods under protective atmosphere, characterized in that it comprises the following steps:

[0014] S1. Operate the lifting mechanism to lift the copper electrode rod to the highest point;

[0015] S2. Operate the mobile trolley to move to the bottom of the copper electrode rod;

[0016] S3, opening the top cover of the protective cover to an open state;

[0017] S4. Operate the lifting mechanism to lower the copper electrode rod to the lowest point; close the top cover of the protective cover to a closed state, and the soft rubber sealing structure contacts and fits with the copper electrode rod;

[0018] S5, gas inlets A1, A2, B1, B2 connecting the protective cover and the argon gas supply system;

[0019] S6, running the argon supply system for 191 min to replace the gas inside the protective cover;

[0020] S7, run the rotating motor to start the rotating work, then run the laser power supply to start cleaning;

[0021] S8, operate the lifting system and start lifting the copper electrode rod;

[0022] S9, when the copper electrode rod is lifted to the top, stop lifting, turn off the laser power supply, rotate the motor, and turn off the argon gas supply system in sequence;

[0023] S10, remove the mobile cart and clean up

[0024] Compared with the prior art, the advantages and positive effects of the present invention are:

[0025] The device and method provided by the present invention can be combined with the original equipment structure of the vacuum electroslag furnace. A mobile trolley structure equipped with a laser system, a rotating mechanism, a protective cover and an argon supply system can achieve efficient and high-quality cleaning of the copper electrode rod of the electroslag furnace, and can avoid the influence of uneven damage to the surface roughness and surface cylindricity of the copper electrode rod caused by conventional wiping and grinding cleaning, which will affect the vacuum performance of the equipment and reduce the service life of the electrode rod.

[0026] The device and method provided by the design of the present invention mainly utilize the principle of instantaneous laser cleaning and timely purging of inert gas argon, so as to achieve the purpose of thorough cleaning; the cleaning work under the argon protection environment can effectively prevent the risk of oxidation of the surface of the copper electrode rod during laser cleaning, protect the surface of the copper electrode rod, and is conducive to improving the service life of the copper electrode rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a device and method for laser cleaning of vacuum electroslag furnace electrode rods under a protective atmosphere according to the present invention;

[0028] Figure 2 A top view of a device and method for laser cleaning of electrode rods of a vacuum electroslag furnace under a protective atmosphere according to the present invention;

[0029] Figure 3 The present invention is a structural diagram of a protective cover of a device and method for laser cleaning of electrode rods of a vacuum electroslag furnace under a protective atmosphere.

[0030] in:

[0031] 1. Lifting mechanism; 2. Top platform; 3. Screw pair; 4. Nut pair; 5. Copper electrode rod; 6. Soft rubber sealing structure; 7. Laser gun head; 8. Laser system; 9. Protective cover; 10. Rotating motor; 11. Gear; 12. Base; 13. Moving trolley; 14. Furnace head bracket; 15. Laser power supply; 16. Limiting slide rod; 17. Guide rod; 18. Middle channel; 19. Argon supply system; 20. Rotating drive mechanism. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example

[0034] like Figure 1-3 As shown, the present invention provides a technical solution: a device and method for laser cleaning of electrode rods of a vacuum electroslag furnace under a protective atmosphere, the device comprising a lifting mechanism 1, a top platform 2, a copper electrode rod 5, a laser system 8, a protective cover 9, a moving trolley 13, a furnace head bracket 14, a laser power supply 14, a guide rod 17, an argon supply system 19 and a rotating drive mechanism 20, the laser system is composed of a laser power supply 15 and a laser gun head 7, the laser power supply 15 is installed on the moving trolley 13, the laser gun head 7 is installed and fixed on the upper part of the protective cover 9, and the entire protective cover 9 is installed on the moving trolley 13.

[0035] Furthermore, the laser system 8 is composed of a laser power supply 15 and a laser gun head 7. The laser power supply 15 is installed on the moving cart 13. The laser gun head 7 is fixed to the upper part of the protective cover 9. The entire protective cover 9 is installed on the moving cart 13.

[0036] Furthermore, the movable carriage 13 can be moved into or out of the position below the copper electrode rod 5, and the movable carriage 13 is equipped with a laser system 8, a rotation drive mechanism 20 and a protective cover 9.

[0037] Furthermore, the rotary drive mechanism 20 is a gear meshing mechanism, including a rotary motor 10, a gear 11, a base 12 and a protective cover 9 installed on the gear structure, and can rotate around the electrode rod as the gear 11 meshes and rotates.

[0038] Furthermore, the rotary motor 10 in the rotary drive mechanism 20 is a stepping angular displacement motor, which can perform cyclic output rotation within the range of -180° to +180° according to a preset value, drive the gear to rotate within the range of -180° to +180°, thereby driving the protective cover 8 and the laser gun head 7 thereon to rotate within the range of -180° to +180°.

[0039] Furthermore, the protective cover 9 is provided with an air inlet A1 and an air outlet B1, which are respectively connected to the argon supply system 19; the air inlet A1 is arranged near the position directly below the laser gun head 7, and the argon purge provides auxiliary cleaning effect, and also provides a suitable protective atmosphere for the cleaning of the copper electrode rod 5; the top cover of the protective cover 9 is a movable split structure 9.1 and 9.2, and is equipped with a soft rubber structure 6 for sealing; the function of preparing for the descent of the electrode rod and sealing and pressing the top cover can be smoothly realized before the cleaning work starts.

[0040] Furthermore, the argon supply system 19 is a closed-loop circulation system having the functions of inhaling, filtering, storing, and pressurizing and outputting argon gas. The gas outlet A2 and the gas inlet B2 are respectively connected to the gas inlet A1 and the gas outlet B1 on the protective cover by hoses.

[0041] Furthermore, the copper electrode rod 5 can move up and down under the action of the top lifting mechanism 1, the protective cover 9 can rotate under the action of the rotating mechanism 10, and the laser gun head 7 is assembled on the protective cover 9, thereby realizing the cleaning function of the surface of the electrode rod 5.

[0042] Furthermore, the connecting hose between the protective cover 9 and the argon supply system 19, and the power line of the laser gun head 7 pass through and are led out from the middle channel 18 to solve the entanglement problem caused by the hose and the cable during the rotation operation.

[0043] Cleaning steps and methods:

[0044] Operate the lifting mechanism 1 to lift the copper electrode rod 5 to the highest point;

[0045] Operate the movable carriage 13 to move to the bottom of the copper electrode rod 5;

[0046] Open the top covers 9.1 and 9.2 of the protective cover 9 to the open state;

[0047] Operate the lifting mechanism 1 to lower the copper electrode rod 5 to the lowest point; close the top covers 9.1 and 9.2 of the protective cover 9 to the closed state, and the soft rubber sealing structure 6 contacts and fits with the copper electrode rod 5;

[0048] Connect the protective cover 9 to the gas inlets A1, A2, B1, B2 of the argon gas supply system 19;

[0049] The argon supply system was operated for 191 min to replace the gas inside the protective cover 9;

[0050] The rotary motor 10 is operated to start the rotation work, and then the laser power supply 15 is operated to start the cleaning;

[0051] The lifting system 1 is operated to start lifting the copper electrode rod 5;

[0052] When the copper electrode rod 5 is lifted to the top, the lifting is stopped, and the laser power supply 15, the rotating motor 10, and the argon gas supply system 19 are turned off in sequence;

[0053] The mobile cart 13 is removed and the cleaning is complete.

[0054] The device and method provided by the present invention can be combined with the original equipment structure of the vacuum electroslag furnace. A mobile trolley 13 structure equipped with a laser system 7, a rotary drive mechanism 20, a protective cover 9 and an argon supply system 19 can achieve efficient and high-quality cleaning of the copper electrode rod 5 of the electroslag furnace, and can avoid the conventional wiping and grinding cleaning causing the roughness and surface cylindricality of the copper electrode rod 5 to deteriorate, which will affect the vacuum performance of the equipment and the service life of the copper electrode rod 5.

[0055] The device and method provided by the design of the present invention utilize the characteristics of concentrated laser energy. The light waves are absorbed by the attachments on the surface, causing a rapid expansion effect on the surface of the attachments, and the resulting micro shock waves cause the attachments to fall off. During the process, the purging of argon gas can assist in cleaning the attachments on the surface in time, thereby achieving the purpose of thorough cleaning. The cleaning work under the argon protection environment can effectively prevent the risk of oxidation of the surface of the copper electrode rod 5 during laser cleaning, protect the surface of the copper electrode rod, and is beneficial to improving the service life of the copper electrode rod 5.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for laser cleaning of electrode rods in a vacuum electroslag furnace under a protective atmosphere, comprising a lifting mechanism (1), a top platform (2), a copper electrode rod (5), a laser system (8), a protective cover (9), a moving trolley (13), a furnace head support (14), a laser power supply (15), a guide rod (17), an argon gas supply system (19) and a rotary drive mechanism (20), characterized in that: The laser system (8) is composed of a laser power supply (15) and a laser gun head (7), wherein the laser power supply (15) is mounted on a moving vehicle (13), the laser gun head (7) is mounted and fixed on the upper part of a protective cover (9), and the entire protective cover (9) is mounted on the moving vehicle (13); The movable carriage (13) moves to a position below the copper electrode rod (5), and the movable carriage (13) is equipped with a laser system (8), a rotary drive mechanism (20) and a protective cover (9); The rotary drive mechanism (20) is a gear meshing mechanism, comprising a rotary motor (10), a gear (11), and a base (12); the protective cover (9) is mounted on the gear and can rotate around the electrode rod as the gear (11) meshes and rotates; The rotary motor (10) in the rotary drive mechanism (20) is a stepping angular displacement motor; The protective cover (9) is provided with an air inlet A1 and an air outlet B1, which are respectively connected to the argon gas supply system (19); the air inlet A1 is arranged at a position directly below the laser gun head (7); The argon gas supply system (19) is a closed-loop circulation system, wherein the gas outlet A2 and the gas inlet B2 are respectively connected to the gas inlet A1 and the gas outlet B1 on the protective cover by means of hoses; The copper electrode rod (5) can move up and down under the action of the top lifting mechanism (1), the protective cover (9) can rotate under the action of the rotating motor (10), and the laser gun head (7) is assembled on the protective cover (9).

2. The device for laser cleaning of electrode rods of vacuum electroslag furnace under protective atmosphere according to claim 1, characterized in that: The connecting hose between the protective cover (9) and the argon gas supply system (19), as well as the power line of the laser gun head (7) pass through and are led out from the middle channel (18) to solve the entanglement problem caused by the hose and the cable during rotation.

3. A method for laser cleaning of vacuum electroslag furnace electrode rods under protective atmosphere, characterized in that: The device for laser cleaning of vacuum electroslag furnace electrode rods under protective atmosphere as claimed in claim 1 comprises the following steps: S1, operating the lifting mechanism (1) to lift the copper electrode rod (5) to the highest point; S2, operate the mobile trolley (13) to move to the bottom of the copper electrode rod (5); S3, opening the top cover of the protective cover (9) to an open state; S4, operating the lifting mechanism (1) to lower the copper electrode rod (5) to the lowest point; closing the top cover of the protective cover (9) to a closed state, so that the soft rubber sealing structure (6) contacts and fits with the copper electrode rod (5); S5, connecting the protective cover (9) and the gas inlet A1, the gas outlet A2, and the gas outlet B1, the gas inlet B2 of the argon gas supply system (19); S6, operating the argon gas supply system for 191 minutes to replace the gas inside the protective cover (9); S7, running the rotary motor (10) to start the rotation work, and then running the laser power supply (15) to start cleaning; S8, operating the lifting mechanism (1) to start lifting the copper electrode rod (5); S9, when the copper electrode rod (5) is lifted to the top, the lifting is stopped, and the laser power supply (15), the rotating motor (10), and the argon gas supply system (19) are turned off in sequence; S10, remove the mobile trolley (13), and the cleaning is completed.

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