A continuous feeding device for gas atomization powder production

Abstract

The utility model relates to a kind of gas atomization powder making continuous feeding device, belong to metal powder preparation technical field.The structure includes charging chamber (1), smelting chamber (2), manipulator (6), roller A (14), laser welding equipment (16) and roller B (17), manipulator (6) is set in charging chamber (1) upper end, roller A (14), laser welding equipment (16) and roller B (17) are sequentially spaced from top to bottom in smelting chamber (2), and roller A (14) and roller B (17) are spaced along the inner wall circumferential direction of smelting chamber (2) setting.The structure replenishes spare alloy bar (11) in time by manipulator (6), and atomization alloy bar (12) and spare alloy bar (11) are welded using laser welding equipment (16), no rod tail is generated, and continuous feeding is realized.The problem of raw material waste due to the small diameter of alloy bar is solved by directly machining thread on the end of the alloy bar.

Description

Technical Field

[0001] This utility model relates to a continuous feeding device for gas atomization powder making, belonging to the field of metal powder preparation technology. Background Technology

[0002] The electrode induction melting gas atomization powder making equipment uses a high-frequency induction coil to heat the tip of the alloy rod. After the alloy rod melts, the molten droplets are broken up multiple times by high-purity argon gas accelerated by the spray plate under the pressure difference between gravity and the melting chamber and the atomization chamber, forming metal microdroplets. These microdroplets are then rapidly cooled and spheroidized in the high-speed argon gas flow to form metal powder with a particle size of 0μm-100μm.

[0003] Currently, most domestic gas atomization powder production equipment adopts a discontinuous production method. After the melting and atomization of a single alloy rod is completed, the material changing chamber door needs to be manually opened to replace the alloy rod. After closing the material changing chamber door, the chamber is evacuated and filled with argon. The rod changing and evacuation time accounts for 60% of the melting and atomization time. During the rod changing interval, the argon recovery equipment with a total power of approximately 500kW is constantly running, resulting in high power consumption. Therefore, the operation of replacing alloy rods leads to low production efficiency and high production costs for gas atomization powder production equipment. Chinese patent CN119457096A discloses a continuous titanium alloy atomization powder production equipment. In order to achieve continuous feeding, this structure selects to process threads on the material rod, using threads to connect the next section of the material rod to the previous section. Since the diameter of the atomized alloy rod is generally 70mm, processing protruding threads will cause a large amount of raw material waste and reduce material utilization. Utility Model Content

[0004] The technical problem to be solved by this utility model is that due to the small diameter of the alloy rod, directly machining the connecting thread at its end results in a waste of raw materials.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a continuous feeding device for gas atomization powder making, including a feeding chamber and a melting chamber, and also including a robot, roller A, laser welding equipment and roller B. The robot is set at the upper end of the feeding chamber and its working radius covers the entire inner cavity of the feeding chamber. Roller A, laser welding equipment and roller B are arranged in the melting chamber from top to bottom at intervals. Roller A and roller B are both arranged at intervals along the circumferential direction of the inner wall of the melting chamber.

[0006] The aforementioned structure also includes a scanner, which is located in the melting chamber and electrically connected to the laser welding equipment.

[0007] In the above structure, a pressure sensor is provided on roller A, and the pressure sensor can control the rotational speed of roller A and roller B.

[0008] Furthermore, the above structure also includes a storage vehicle, which has rollers at its lower end, several limiting holes at intervals at its upper end, and lifting rings at the corners.

[0009] Furthermore, the limiting holes at the upper end of the storage vehicle in the above structure are arranged in a 3×3 pattern.

[0010] In the above structure, the feeding chamber is provided with an openable side door on one side, and a support platform is provided on the outside of the side door.

[0011] Furthermore, in the above structure, the feeding chamber has an opening on one side, one end of the side door is hinged to the side wall of the opening, the other side is equipped with a locking handwheel, and a sealing ring is provided at the outer edge of the inner side of the side door.

[0012] In the above structure, a gate valve is provided at the connection between the feeding chamber and the melting chamber, and the gate valve is located above roller A.

[0013] In the above structure, the upper part of the feeding chamber is equipped with an air filling valve and an air extraction valve at intervals.

[0014] In the above structure, a positioning ring is provided below the roller B.

[0015] The beneficial effects of this utility model are: (1) This structure allows multiple alloy rods to be stored in a storage cart during a single production process, achieving continuous atomization through welding, and enabling the entire alloy rod storage cart to be replaced during the powder collection process. Taking the smelting of 50×900mm alloy rods as an example, the current atomization powder production time is 15 minutes, the rod changing time is about 9 minutes, and the production speed is 7.95 / (27 / 60) = 19.88 kg / h. After adopting a continuous feeding mechanism, the rod changing time is 0 minutes, the production speed is 7.95 / (15 / 60) = 31.8 kg / h, and the production efficiency is increased by 60%. (2) This structure can greatly reduce the power consumption of the argon recovery device in a single production process. After continuous atomization, the argon recovery device is always in production. Based on the total power of the argon recovery equipment of about 500kw, with 40 alloy rods per day, the power consumption of the argon recovery device during the rod changing interval is 40×9 / 60×500=3000kWh. The power consumption is reduced by 3000 / (40×7.95)=9.4kWh per kilogram of titanium powder.

[0016] (3) This structure uses laser welding to atomize the alloy rod and the spare alloy rod, without producing rod tails; at the same time, it does not require connecting the alloy rod by thread, avoiding the low yield of alloy rods caused by processing concave and convex threads, making the utilization rate of alloy rods 100% and reducing the procurement cost of alloy rods.

[0017] (4) In the production process of this structure, an alloy rod storage car is used for overall hoisting and free pushing and pushing out of the feeding chamber, which reduces the number of rod changes from 40 times a day to 1 time, greatly reduces the number of times mechanical pumps, Roots pumps, material changing chamber doors and slide valves are used, and reduces the wear and tear of equipment spare parts; at the same time, it greatly reduces the labor intensity of workers and improves production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the feeding structure of this utility model.

[0020] Figure 3 This is a top view of the storage vehicle of this utility model.

[0021] In the diagram: 1. Feeding chamber; 2. Melting chamber; 3. Atomization chamber; 4. Air inlet valve; 5. Air extraction valve; 6. Robotic arm; 7. Side-opening door; 8. Locking handwheel; 9. Support platform; 10. Storage cart; 11. Spare alloy rod; 12. Atomized alloy rod; 13. Slide valve; 14. Roller A; 15. Scanner; 16. Laser welding equipment; 17. Roller B; 18. Positioning ring; 19. Coil; 20. Spray disc. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 3As shown, this utility model discloses a continuous feeding device for gas atomization powder making, including a feeding chamber 1 and a melting chamber 2, as well as a robotic arm 6, roller A14, laser welding equipment 16, and roller B17. The robotic arm 6 is located at the upper end of the feeding chamber 1, and its working radius covers the entire inner cavity of the feeding chamber 1. The roller A14, laser welding equipment 16, and roller B17 are arranged sequentially and alternately from top to bottom in the melting chamber 2. Rollers A14 and B17 are arranged circumferentially along the inner wall of the melting chamber 2. Those skilled in the art will understand that this structure, through the timely replenishment of spare alloy rods 11 by the robotic arm 6 and the welding of atomized alloy rods 12 and spare alloy rods 11 by the laser welding equipment 16, avoids the formation of rod tails, achieving continuous feeding of alloy rods, improving the production efficiency and material utilization rate of metal powder in the atomization powder making furnace, and reducing production costs. Specifically, the robotic arm 6 is positioned at the upper end of the feeding chamber 1, with its operating radius covering the entire inner cavity of the feeding chamber 1. Multiple spare alloy rods 11 are stored in the feeding chamber 1. The robotic arm 6 clamps the spare alloy rods 11 to the feeding position. Rollers A14 and B17 serve as the feeding devices. Roller A14 rotates, causing the spare alloy rods 11 to descend rapidly; roller B17 rotates slowly, causing the welded atomized alloy rods 12 to descend into the melting coil 19 for melting and atomization. To ensure stable feeding, rollers A14 and B17 are preferably spaced circumferentially along the inner wall of the melting chamber 2. Therefore, the feeding position for the atomized alloy rods 12 and spare alloy rods 11 is located at the center of the circumference of rollers A14 and B17, away from the center of the melting chamber 2. At least one roller in rollers A14 and B17 is automatically rotated by a motor. To ensure stable feeding of the alloy rods, it is preferable that rollers A14 and B17 each consist of two rows, one above the other. The laser welding equipment 16 is primarily used for welding the atomized alloy rod 12 and the spare alloy rod 11. Since the welding feed for the atomized alloy rod 12 and the spare alloy rod 11 moves downwards at a certain speed along the center of the circumference of rollers A14 and B17 away from the center of the melting chamber 2, i.e., the center of the circumference of rollers A14 and B17, the welding torch of the laser welding equipment 16 should be positioned on the outside of the atomized alloy rod 12 and the spare alloy rod 11.

[0024] Preferably, the above structure also includes a scanner 15, which is disposed in the melting chamber 2 and electrically connected to the laser welding equipment 16. Those skilled in the art will understand that, to ensure welding accuracy, this structure preferably also includes a scanner 15. The scanner 15 is mainly used to monitor the arrival of the spare alloy rod 11 and the atomized alloy rod 12 joints at the laser welding position. Therefore, it is preferable to electrically connect the scanner 15 to the laser welding equipment 16 so that the signal can be transmitted to the laser welding equipment 16 for welding. Therefore, it is actually disposed in the melting chamber 2, and the specific location can be determined according to actual needs, as long as the laser welding equipment 16 can operate when the spare alloy rod 11 and the atomized alloy rod 12 joints arrive at the laser welding position.

[0025] Preferably, a pressure sensor is provided on roller A14 in the above structure, and the pressure sensor can control the rotational speed of roller A14 and roller B17. Those skilled in the art will understand that this is to ensure that the bottom of the spare alloy rod 11 and the top of the atomized alloy rod 12 have the same speed after contact, thus guaranteeing welding quality. It is practically preferred that a pressure sensor be provided on roller A14. When the bottom of the spare alloy rod 11 contacts the top of the atomized alloy rod 12, the pressure sensor transmits the pressure change to the driver of roller A14, thereby controlling the rotational speed of roller A14 to reduce it to the same speed as roller B17.

[0026] Preferably, the above structure also includes a storage cart 10. The storage cart 10 has rollers at its lower end, a plurality of limiting holes 101 spaced apart at its upper end, and lifting rings at the corners. Those skilled in the art will understand that, for convenient feeding of alloy rods, this structure preferably includes a storage cart 10 for storing alloy rods. A plurality of limiting holes 101 are spaced apart at the upper end of the storage cart 10, into which spare alloy rods 11 are inserted and fixed. Since the spare alloy rods 11 are cylindrical, the shape of the limiting holes 101 is adapted to the shape of the spare alloy rods 11. Meanwhile, rollers are provided at the bottom of the storage cart 10 to facilitate pushing and pushing out of the feeding chamber 1. Preferably, the rollers have a self-locking function for easy and stable placement in the feeding chamber 1. Preferably, the storage cart 10 is placed symmetrically in the feeding chamber 1 to maintain the balance of the feeding chamber 1. Since the storage cart 10 has a square structure, lifting rings are provided at the four corners for easy lifting.

[0027] Preferably, the limiting holes 101 at the upper end of the storage vehicle 10 in the above structure are arranged in a 3×3 pattern. Those skilled in the art will understand that the limiting holes 101 are preferably arranged in a 3×3 pattern, that is, three rows of limiting holes 101 are provided at the upper end of the storage vehicle 10, and each row has three limiting holes 101.

[0028] Preferably, in the above structure, an openable side door 7 is provided on one side of the feeding chamber 1, and a support platform 9 is provided on the outside of the side door 7. Those skilled in the art will understand that, in order to facilitate the entry and exit of the storage vehicle 10 from the feeding chamber 1, this structure provides an openable side door 7 on one side of the feeding chamber 1, and a support platform 9 is provided on the outside of the side door 7. The upper surface of the support platform 9 is flush with the upper bottom surface of the melting chamber 2. The storage vehicle 10 is hoisted onto the support platform 9, and the storage vehicle 10 can be freely pushed into and pulled out of the feeding chamber 1.

[0029] Preferably, in the above structure, the feeding chamber 1 has an opening on one side, a side door 7 is hinged at one end to the side wall of the opening, and a locking handwheel 8 is provided on the other side. A sealing ring is provided at the outer edge of the inner side of the side door 7. Those skilled in the art will understand that, to facilitate the opening and closing of the side door 7, this structure preferably has one end of the side door 7 hinged to the side wall of the opening, a locking handwheel 8 provided on the other side, and a sealing ring provided at the outer edge of the inner side of the side door 7. This effectively ensures the airtightness of the feeding chamber 1 through the locking handwheel 8 and the sealing ring.

[0030] Preferably, a gate valve 13 is provided at the connection between the feeding chamber 1 and the melting chamber 2 in the above structure, and the gate valve 13 is located above the roller A14. It will be understood by those skilled in the art that since the feeding chamber 1 is mainly used for feeding, the connection with the melting chamber 2 will be cut off during actual feeding, so there is a gate valve 13 at its bottom to separate it from the melting chamber 2.

[0031] Preferably, in the above structure, an air filling valve 4 and an air extraction valve 5 are spaced apart on the upper part of the feeding chamber 1. Those skilled in the art will understand that, since air is supplied to the feeding chamber 1 during the replacement of the alloy rod storage cart 10 and to the melting chamber 2 during the atomization process, the pressure in the melting chamber 2 is kept higher than the pressure in the atomization chamber 3 to prevent molten droplets from spraying back; simultaneously, a vacuum is required before melting, atomizing, and powdering, hence the air filling valve 4 and the air extraction valve 5 are spaced apart on the upper part of the feeding chamber 1.

[0032] Preferably, a positioning ring 18 is provided below the roller B17 in the above structure. Those skilled in the art will understand that, since the atomizing alloy rod 12 needs to be fed along the center of the coil 19, a positioning ring 18 is provided below the roller B17, and the axis of the positioning ring 18 should coincide with the axis of the coil 19. The positioning ring 18 is used to correct the eccentricity of the alloy rod 12, preventing the alloy rod from being eccentric and touching the coil 19, thus causing a discharge.

[0033] Working principle: Before use, the atomized alloy rod 12 is placed in the melting chamber 2 with its top position higher than the laser welding area. The insertion / removal valve 13 is closed, and the locking handwheel 8 of the side door 7 is opened. Air is supplied to the feeding chamber 1 through the inflation valve 4, causing the side door 7 to open automatically. The storage cart 10 is pulled out onto the support platform 9 and hoisted to the ground via the lifting ring. The storage cart 10, filled with spare alloy rods 11, is then hoisted onto the platform 9 and pushed into the feeding chamber 1. The bottom rollers of the storage cart 10 are locked for fixation. The side door 7 is closed and locked with the locking handwheel 8. The suction valve 5 is opened to evacuate the feeding chamber 1. When the pressure drops to 0.1 Pa, the suction valve 5 is closed, and the inflation valve 4 is opened, allowing the feeding chamber 1 to return to its normal operating state. Return to normal pressure and open the plug-in valve; adjust the pressure of the inflation valve 4 to make the internal pressure of the melting chamber 2 0.03-0.18MPa to ensure that the molten droplets do not spray back; turn on the power of the melting coil 19; after the first droplet falls, turn on the roller B17, and the atomized alloy rod 12 slowly descends. Under the action of the positioning ring 18, it remains concentric with the coil 19 and the spray plate 20. After the conical bottom of the atomized alloy rod 12 is melted by the melting coil 19, the molten droplet enters the spray plate 20 and is atomized into the atomization chamber 3 to cool into spherical metal powder; the robot arm 6 takes out the spare alloy rod 11 from the storage cart 10 and moves it to the inlet of the roller A14. The roller A14 rotates and drives the spare alloy rod 11 downward. The pressure sensor integrated on the roller A14 detects its load in real time. When a sudden increase in pressure is detected, indicating that the bottom of the spare alloy rod 11 has made close contact with the top of the atomized alloy rod 12, the control system immediately commands the rotation speed of the roller A14 to decrease to be synchronized with the slow descent speed of the roller B17. Subsequently, scanner 15 monitors the arrival of the joint between the spare alloy rod 11 and the atomized alloy rod 12 in the laser welding area and transmits the signal to laser welding equipment 16. Laser welding equipment 16 emits a laser to weld the joint between the spare alloy rod 11 and the atomized alloy rod 12, resulting in a new atomized alloy rod 12. When welding is complete, the new atomized alloy rod 12 continues to descend under the drive of roller B17. When its top is completely detached from roller A14, the pressure sensor of roller A14 sends a feedback signal to the system main controller. The controller then instructs robot 6 to perform the next material handling and loading action, picking up the spare alloy rod 11 and placing it at the inlet of roller A14 to achieve continuous feeding and atomization. When the last spare alloy rod 11 is used up, the top of the new atomized alloy rod 12 detaches from roller A14. It is necessary to first turn off the power to induction coil 19, turn off roller B17, and turn off roller A14. After the conical part of the atomized alloy rod 12 cools down, close the inflation valve 4 and the insert valve 13, and repeat the previous operation to replace the storage cart 10.

Claims

1. A continuous feeding device for gas atomization powder making, comprising a feeding chamber (1) and a melting chamber (2), characterized in that: It also includes a robot (6), roller A (14), laser welding equipment (16) and roller B (17). The robot (6) is located at the upper end of the feeding chamber (1) and its working radius covers the entire inner cavity of the feeding chamber (1). The roller A (14), laser welding equipment (16) and roller B (17) are arranged in the melting chamber (2) from top to bottom at intervals. The roller A (14) and roller B (17) are arranged at intervals along the inner wall of the melting chamber (2) in the circumferential direction.

2. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: It also includes a scanner (15) which is located in the melting chamber (2) and electrically connected to the laser welding equipment (16).

3. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: A pressure sensor is provided on roller A (14), and the pressure sensor can control the rotational speed of roller A (14) and roller B (17).

4. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: It also includes a storage vehicle (10), which has a roller at the lower end, a number of limiting holes (101) at intervals at the upper end, and a lifting ring at the corner.

5. The continuous feeding device for gas atomization powder production according to claim 4, characterized in that: The limiting holes (101) at the upper end of the storage vehicle (10) are arranged in a 3×3 pattern.

6. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: The feeding chamber (1) is provided with an openable side door (7) on one side, and a support platform (9) is provided on the outside of the side door (7).

7. The continuous feeding device for gas atomization powder production according to claim 6, characterized in that: The feeding chamber (1) has an opening on one side, and one end of the side door (7) is hinged to the side wall of the opening. A locking handwheel (8) is provided on the other side, and a sealing ring is provided on the outer edge of the inner side of the side door (7).

8. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: A slide gate valve (13) is provided at the connection between the feeding chamber (1) and the melting chamber (2), and the slide gate valve (13) is located above the roller A (14).

9. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: The upper part of the feeding chamber (1) is provided with an air filling valve (4) and an air extraction valve (5) at intervals.

10. The continuous feeding device for gas atomization powder production according to claim 1, characterized in that: A positioning ring (18) is provided below the roller B (17).

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