A cobalt-based alloy vacuum melting apparatus

Abstract

The application discloses a cobalt-based alloy vacuum smelting equipment and belongs to the technical field of metal smelting equipment. Mainly including smelting furnace, the inside of smelting furnace is provided with crucible, the upper end of crucible is provided with lug, the bottom of lug is provided with positioning arc, the side of smelting furnace is provided with mechanical arm, the output end of mechanical arm is installed with clamping seat, two groups of clamping parts are hinged on clamping seat, each group of clamping parts has two clamping jaws, connecting rod is installed between two clamping jaws, first torsional spring is installed between clamping seat and clamping part, sliding hole is formed in clamping seat, pressure column is slidably arranged in sliding hole, sealing plate is installed at the bottom of pressure column, spring is installed between sealing plate and clamping seat. The cobalt-based alloy vacuum smelting equipment of the application is provided with movable sealing plate at the upper end of crucible, so that when the crucible containing molten cobalt-based alloy is taken out by mechanical hand, the opening of crucible is shielded by sealing plate, thereby avoiding splashing caused by shaking of crucible.

Description

Technical Field

[0001] This application relates to the field of metal smelting equipment technology, specifically a cobalt-based alloy vacuum smelting equipment. Background Technology

[0002] Cobalt-based alloys are hard alloys that can withstand various types of wear, corrosion, and high-temperature oxidation. They are commonly referred to as cobalt-chromium-tungsten (molybdenum) alloys or Stellite alloys. Cobalt-based alloys are a class of alloys with cobalt as the main component, containing a considerable amount of nickel, chromium, tungsten, and small amounts of alloying elements such as molybdenum, niobium, tantalum, titanium, and lanthanum. Occasionally, they also contain iron. Depending on the composition of the alloy, they can be made into welding wires and powders for hardfacing, thermal spraying, spray welding, and other processes. They can also be made into castings, forgings, and powder metallurgy parts.

[0003] Vacuum melting equipment is required in the production process of cobalt-based alloys. Vacuum melting equipment is a special equipment for melting metals under vacuum or protective atmosphere conditions. It optimizes the metallurgical reaction by reducing the gas phase pressure and is mainly used to prepare high-purity metals and alloys with low impurity content.

[0004] In the vacuum induction melting process of cobalt-based alloys, the raw materials prepared in proportion are added to the crucible of the vacuum melting equipment, and then induction heating is used to rapidly melt and uniformly mix the raw materials to ensure that each element is evenly distributed in the alloy liquid.

[0005] After the cobalt-based alloy is melted, a robotic arm is needed to remove the crucible and pour the molten alloy into a mold. However, vibration is unavoidable during this process. Excessive vibration can cause molten metal to splash out, potentially burning or damaging surrounding equipment and personnel. This risk is particularly pronounced when the crucible has just melted and the molten metal surface is still unstable. Therefore, it is necessary to provide a vacuum melting device for cobalt-based alloys to address these issues.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a vacuum melting equipment for cobalt-based alloys, which solves the problem of metal splashing that may occur when the crucible is removed by a robotic arm after the cobalt-based alloy melting is completed, due to the shaking of the crucible.

[0008] The technical solution adopted by this application to solve its technical problem is: a cobalt-based alloy vacuum melting equipment, including a melting furnace, an induction coil is arranged inside the melting furnace, a crucible is arranged inside the induction coil, two sets of lugs are arranged at the upper end of the crucible, and a positioning arc is arranged at the bottom of the lugs;

[0009] A robotic arm is positioned on one side of the smelting furnace, and a clamping assembly is mounted at the output end of the robotic arm. This clamping assembly includes:

[0010] A clamping seat is fixedly installed at the output end of the robotic arm. Two sets of clamping parts are hinged on the clamping seat. Each set of clamping parts has two grippers. A connecting rod is fixedly installed between the two grippers. A first torsion spring is fixedly installed between the clamping seat and the clamping parts.

[0011] A sliding hole is provided in the middle of the clamp, and a pressure column is slidably arranged inside the sliding hole. A sealing plate is fixedly installed at the bottom of the pressure column, and a spring is fixedly installed between the sealing plate and the clamp.

[0012] Furthermore, the distance between the two sets of grippers is greater than the diameter of the crucible.

[0013] Furthermore, the gripper is provided with a platform.

[0014] Furthermore, at least two sets of brackets are fixedly installed on the upper end of the clamp, the brackets are located on one side of the sliding hole, a ratchet shaft is rotatably installed on the brackets, and a pawl is fixedly installed on the ratchet shaft;

[0015] The pressure post has vertically arranged ratchet teeth on both sides, which are adapted to cooperate with the pawl.

[0016] Furthermore, a second torsion spring is fixedly installed between the ratchet shaft and the bracket.

[0017] Furthermore, a motor is fixed on the clamp, and the motor is fixedly installed with the ratchet shaft.

[0018] The beneficial effects of this application are: the cobalt-based alloy vacuum melting equipment provided by this application, by setting a movable sealing plate at the upper end of the crucible, can block the opening of the crucible when the robot arm takes out the crucible containing the molten cobalt-based alloy, thereby avoiding the splashing problem caused by the shaking of the crucible.

[0019] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is an overall schematic diagram of a cobalt-based alloy vacuum melting equipment according to this application;

[0022] Figure 2 for Figure 1 A partial structural diagram at point A in the middle;

[0023] Figure 3 for Figure 2 Exploded view of the gripper assembly;

[0024] Figure 4 for Figure 3 Schematic diagram of the partial structure at point B;

[0025] Figure 5 for Figure 3 A schematic diagram of the partial structure at point C;

[0026] Figure 6 Schematic diagram of the process of clamping the crucible with the gripper assembly Figure 1 ;

[0027] Figure 7 Schematic diagram of the process of clamping the crucible with the gripper assembly Figure 2 ;

[0028] Figure 8 Schematic diagram of the process of clamping the crucible with the gripper assembly Figure 3 ;

[0029] The following are the labeling elements in the figure:

[0030] 1. Smelting furnace; 2. Induction coil; 3. Frame; 4. First cylinder; 5. Crossbeam; 6. First slide rail; 7. Second slide rail; 8. Crucible; 81. Lug; 82. Positioning arc;

[0031] 9. Clamping assembly; 91. Clamping seat; 92. Clamping jaw; 93. Connecting rod; 94. Pressure column; 95. Spring; 96. Sealing plate; 97. Ratchet; 98. Sliding hole; 99. Bracket; 910. Ratchet shaft; 911. Ratchet; 912. Platform;

[0032] 10. Guide rod; 11. Second cylinder; 12. Slide block. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] like Figures 1-3 As shown, this application provides a vacuum melting device for cobalt-based alloys, including a melting furnace 1. An induction coil 2 is installed inside the melting furnace 1, and a crucible 8 is installed inside the induction coil 2. It can be understood that when it is necessary to melt cobalt-based alloys, the raw materials are first placed into the crucible 8 and the melting furnace 1 is sealed.

[0036] Then, the inside of the melting furnace 1 is evacuated by a negative pressure system connected to the melting furnace 1, and the crucible 8 is heated by induction coil 2 until the raw material is molten.

[0037] Finally, open the smelting furnace 1 and use the external robotic arm to remove the crucible 8 for use.

[0038] Continue to refer to Figures 1-3 The robotic arm includes a frame 3 set on one side of the smelting furnace 1. A crossbeam 5 is fixedly installed on the upper end of the frame 3. A first slide rail 6 located at the upper end and a second slide rail 7 located on the side are provided on the crossbeam 5. A slide block 12 is slidably provided on the second slide rail 7 and the first slide rail 6.

[0039] Meanwhile, a first cylinder 4 is fixedly installed on the crossbeam 5. The output end of the first cylinder 4 is fixedly installed with the slide block 12, so that when the first cylinder 4 extends or retracts, the slide block 12 can slide horizontally on the crossbeam 5.

[0040] Continue to refer to Figure 2 A second cylinder 11 is fixedly installed on the slide block 12. A clamping assembly 9 is fixedly installed on the output end of the second cylinder 11, so that when the second cylinder 11 extends or retracts, it can drive the clamping assembly 9 to move in the vertical direction.

[0041] like Figures 2-3 As shown, the clamping assembly 9 includes a clamping seat 91 fixedly installed at the output end of the second cylinder 11, so that the clamping seat 91 can move synchronously with the output end of the second cylinder 11. It should be noted that a guide rod 10 is vertically arranged on the slide 12, and the clamping seat 91 is slidably arranged on the guide rod 10, so that the clamping seat 91 can be guided by the guide rod 10 during its movement.

[0042] The clamp 91 is hinged with two sets of clamping parts, and each set of clamping parts has two jaws 92, and a connecting rod 93 is fixedly installed between the two jaws 92.

[0043] It should be noted that the distance between the two sets of grippers 92 is greater than the diameter of the crucible 8, so that the crucible 8 is located in the middle position of the two sets of grippers 92 when it is clamped.

[0044] Meanwhile, a first torsion spring is fixedly installed between the clamping seat 91 and the clamping part, so that in the initial state, due to the action of the first torsion spring, the two sets of clamping parts are in a position close to each other.

[0045] like Figures 3-5 As shown, a sliding hole 98 is provided in the middle of the clamp 91. A pressure column 94 is slidably disposed in the sliding hole 98. A sealing plate 96 is fixedly installed at the bottom of the pressure column 94. The sealing plate 96 is used to seal the upper opening of the crucible 8.

[0046] Meanwhile, a spring 95 is fixedly installed between the sealing plate 96 and the clamp 91, so that the sealing plate 96 is suitable to move closer to the clamp 91 under the action of external force, and to return to its original position by the spring 95 after the external force is removed.

[0047] like Figures 6-7 As shown, two sets of lugs 81 are provided at the upper end of the crucible 8. The bottom of the lugs 81 is provided with a positioning arc 82 that matches the connecting rod 93. At the same time, a platform 912 is provided on the gripper 92. The platform 912 is used to place the sealing plate 96 in the initial state.

[0048] refer to Figures 6-8 The process of clamping the crucible 8 by the clamping component 9 includes the following steps:

[0049] In the initial state, the sealing plate 96 is positioned at the platform 912 under the action of the spring 95;

[0050] When it is necessary to clamp the crucible 8, the clamping assembly 9 enters the melting furnace 1 under the action of the second cylinder 11 and slowly descends until the upper end of the crucible 8 contacts the sealing plate 96.

[0051] As the sealing plate 96 continues to descend, the crucible 8 will support the sealing plate 96 and drive the sealing plate 96 upward, at which point the sealing plate 96 will cover the upper end of the crucible 8.

[0052] As the sealing plate 96 continues to move upward, it will detach from the platform 912 and enter the upper interior of the gripper 92. At this time, the grippers 92 will move closer to each other under the action of the first torsion spring.

[0053] As the grippers 92 approach each other and descend, the connecting rod 93 will gradually be positioned below the lug 81 and vertically aligned with the positioning arc 82.

[0054] Then the second cylinder 11 stops extending and retracts. At this time, the connecting rod 93 is engaged inside the positioning arc 82 to support the crucible 8. As the second cylinder 11 continues to retract, the crucible 8 is lifted synchronously, thus realizing the removal of the crucible 8.

[0055] During the above process, the sealing plate 96, under the action of the spring 95, continuously presses against the upper end of the crucible 8 to seal the opening of the crucible 8, thereby avoiding the splashing problem caused by the shaking when the crucible 8 is lifted.

[0056] During the lifting process of the aforementioned crucible 8, due to its high internal temperature, complete sealing may cause excessive internal pressure. To solve this problem, such as... Figures 3-5 As shown, at least two sets of brackets 99 are fixedly installed on the upper end of the clamp 91. The brackets 99 are located on one side of the sliding hole 98. At the same time, a ratchet shaft 910 is rotatably installed on the brackets 99, and a pawl 911 is fixedly installed on the ratchet shaft 910.

[0057] Furthermore, ratchet teeth 97 are vertically provided on both sides of the pressure column 94. The ratchet teeth 97 are adapted to cooperate with the pawl 911, so that the pressure column 94 can only move vertically upward. When the pressure column 94 moves vertically downward, it will be stuck due to the cooperation of the ratchet teeth 97 and the pawl 911.

[0058] In this application, a second torsion spring can be fixedly installed between the ratchet 910 and the bracket 99, so that when the sealing plate 96 is held by the crucible 8, it can move upward without obstruction. When the crucible 8 is lifted, due to the action of the connecting rod 93 engaging the positioning arc 82, the crucible 8 will descend a small distance. At this time, due to the cooperation of the ratchet 97 and the pawl 911, the pressure column 94 cannot descend, and the sealing plate 96 cannot descend either. At this time, a gap will be generated between the sealing plate 96 and the upper end of the crucible 8. This gap can be used for venting, and because the gap is small, it will not cause splashing problems.

[0059] When it is necessary to reset the pressure column 94, it can be manually reset by manually disengaging the pawl 911 when the clamping assembly 9 is idle.

[0060] In this application, a motor can also be fixed on the clamp 91, and the motor is fixedly installed with the ratchet shaft 910, so that the position of the pawl 911 can be controlled by the motor to realize the automatic reset of the pawl 911.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vacuum melting device for cobalt-based alloys, characterized in that: include: A smelting furnace (1) is provided with an induction coil (2) inside the smelting furnace (1), and a crucible (8) is provided inside the induction coil (2). Two sets of lugs (81) are provided at the upper end of the crucible (8), and a positioning arc (82) is provided at the bottom of the lugs (81). A robotic arm is disposed on one side of the smelting furnace (1), and a clamping assembly (9) is installed at the output end of the robotic arm. The clamping assembly (9) includes: A clamp (91) is fixedly installed at the output end of the robotic arm. Two sets of clamping parts are hinged on the clamp (91). Each set of clamping parts has two grippers (92). A connecting rod (93) is fixedly installed between the two grippers (92). A first torsion spring is fixedly installed between the clamp (91) and the clamping parts. A sliding hole (98) is provided in the middle of the clamp (91), and a pressure column (94) is slidably arranged inside the sliding hole (98). A sealing plate (96) is fixedly installed at the bottom of the pressure column (94), and a spring (95) is fixedly installed between the sealing plate (96) and the clamp (91).

2. The vacuum melting equipment for cobalt-based alloys according to claim 1, characterized in that: The distance between the two sets of grippers (92) is greater than the diameter of the crucible (8).

3. The cobalt-based alloy vacuum melting equipment according to claim 2, characterized in that: A platform (912) is provided on the gripper (92).

4. The vacuum melting equipment for cobalt-based alloys according to claim 3, characterized in that: At least two sets of brackets (99) are fixedly installed on the upper end of the clamp (91). The brackets (99) are located on one side of the sliding hole (98). A ratchet shaft (910) is rotatably installed on the brackets (99), and a pawl (911) is fixedly installed on the ratchet shaft (910). The pressure post (94) is vertically provided with ratchet teeth (97) on both sides, and the ratchet teeth (97) are adapted to cooperate with the pawl (911).

5. The vacuum melting equipment for cobalt-based alloys according to claim 4, characterized in that: A second torsion spring is fixedly installed between the ratchet shaft (910) and the bracket (99).

6. The vacuum melting equipment for cobalt-based alloys according to claim 4, characterized in that: A motor is fixed on the clamp (91), and the motor is fixedly installed with the ratchet shaft (910).

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