Tungsten-molybdenum alloy vertical melting sintering electrode clamping device

Abstract

The utility model belongs to powder metallurgy technical field, concretely relates to a tungsten molybdenum alloy vertical melting sintering electrode clamping device, including mounting seat, the bottom fixed mounting of mounting seat has clamping mechanism, and one end fixed mounting of clamping mechanism has fixed establishment, wherein, clamping mechanism includes the frame fixed installation in the bottom of mounting seat, and one side fixed mounting of frame has transmission assembly, and transmission assembly is used for driving mounting piece to drive fixed establishment movement, makes tungsten molybdenum alloy bar clamping in the inside of fixed establishment, and transmission assembly is used for driving support to drive insulating baffle vertical movement, makes insulating baffle with tungsten molybdenum alloy bar top abuts. The utility model can provide the antiskid clamping force of far more than traditional clamp through the linkage cooperation of clamping mechanism and fixed establishment, and at the same time, through spring and insulating baffle, the workpiece can be self-adapting shrink, avoid the stress cracking produced because of rigid clamping, and the yield is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of powder metallurgy technology, specifically relating to a clamping device for tungsten-molybdenum alloy vertical melting sintering electrodes. Background Technology

[0002] In the field of powder metallurgy, tungsten, molybdenum, and their alloys are widely used in aerospace, electronics, and high-temperature furnace components due to their excellent properties such as high melting point, high strength, high temperature resistance, and corrosion resistance. Because of their extremely high melting point, they are typically prepared using powder metallurgy methods, with vertical melting sintering being a key process. Vertical melting sintering involves vertically suspending a pressed tungsten-molybdenum alloy powder blank and directly heating it with an electric current, utilizing the material's own electrical resistance to generate Joule heat, thus densifying it at high temperatures. During this process, the clamping device must not only provide mechanical support to prevent the workpiece, in its softened state at high temperatures, from bending or breaking due to its own weight.

[0003] Problems with existing technology: Currently available tungsten and molybdenum workpieces have high hardness and smooth surfaces. Rigid copper clamps cannot provide sufficient and uniform friction, which can easily cause the workpieces to slip or even fall off, resulting in production accidents. At the same time, the workpieces will undergo significant linear shrinkage during sintering. Rigid clamping will generate huge tensile stress inside the workpieces, which can easily tear the workpieces that have not been fully sintered and densified, leading to product scrap. Utility Model Content

[0004] The purpose of this invention is to provide a clamping device for tungsten-molybdenum alloy vertical melting sintering electrodes. Through the linkage between the clamping mechanism and the fixing mechanism, it provides a much stronger anti-slip clamping force than traditional clamps. At the same time, the spring and insulating baffle can adapt to the shrinkage of the workpiece, avoiding stress cracking caused by rigid clamping and greatly improving the yield.

[0005] The specific technical solution adopted by this utility model is as follows: A clamping device for a tungsten-molybdenum alloy vertical melting sintered electrode includes a mounting base; A clamping mechanism is fixedly installed at the bottom of the mounting base, and a fixing mechanism is fixedly installed at one end of the clamping mechanism; The clamping mechanism includes a frame fixedly installed at the bottom of the mounting base. A transmission component is fixedly installed on one side of the frame. The transmission component is used to drive the mounting component to move the fixing mechanism, so that the tungsten-molybdenum alloy rod is clamped inside the fixing mechanism. The transmission component is also used to drive the bracket to move the insulating baffle vertically, so that the insulating baffle abuts against the top of the tungsten-molybdenum alloy rod.

[0006] A guide rod is fixedly installed inside the frame, and mounting components are mirrored on both sides of the frame, with two sets of mounting components slidably installed on both sides of the surface of the guide rod.

[0007] The bottom of the mounting component is fixedly installed with the fixing mechanism, and the top of the mounting component is threadedly installed with the transmission assembly.

[0008] The transmission assembly includes a motor fixedly mounted on one side of the frame, which drives the transmission gear set to rotate the bidirectional screw.

[0009] A rack is vertically slidably mounted inside the frame via a mounting frame. The rack is slidably mounted laterally with the mounting frame and the bracket. An adjusting screw is rotatably mounted inside the bracket. The bottom of the rack is threadedly mounted with the adjusting screw.

[0010] The adjusting screw is used to push the rack to mesh with the transmission gear set, so that the rack pushes the insulating baffle to move vertically through the bracket, and a spring abuts between the insulating baffle and the bracket.

[0011] The fixing mechanism includes a housing fixedly installed at the bottom of the clamping mechanism, and an inner liner fixedly installed inside the housing. The inner liner has several anti-slip protrusions evenly arranged inside.

[0012] The technical effects achieved by this utility model are as follows: This utility model features a transmission component installed on one side of the frame, which drives a bidirectional screw to rotate. Since there are two sets of fixing mechanisms, each fixedly installed with one of the two sets of mounting parts, and the mounting parts are threadedly installed with the bidirectional screw, after placing the tungsten-molybdenum alloy rod between the two sets of fixing mechanisms, the clamping mechanism can clamp and fix tungsten-molybdenum alloy rods of different diameters. At the same time, the anti-slip protrusions set inside the liner can effectively improve the anti-slip effect.

[0013] This invention features a mounting frame that slides vertically inside the frame, while a rack slides laterally with the mounting frame and bracket. Simultaneously, the bottom of the rack is threaded onto an adjusting screw inside the bracket. Rotating the adjusting screw allows the rack to mesh with a transmission gear set. Therefore, during the clamping of the tungsten-molybdenum alloy rod, the rack pushes the bracket vertically, and the insulating baffle pushes the bottom of the tungsten-molybdenum alloy rod to abut against the bottom conical surface of the fixing mechanism. Simultaneously, a spring is compressed and stores potential energy through the insulating baffle. When tensile stress occurs in the molybdenum alloy rod during the vertical melting sintering process, the spring and insulating baffle can adaptively compensate, thereby improving the yield rate. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the overall installation structure of this utility model; Figure 2 This is a schematic diagram of the clamping mechanism installation structure in this utility model; Figure 3 This is a schematic diagram of the installation structure of the transmission component in this utility model; Figure 4This is a schematic diagram of the specific structure of the fixing mechanism in this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Mounting base; 2. Clamping mechanism; 21. Frame; 22. Transmission assembly; 221. Motor; 222. Transmission gear set; 223. Double-acting screw; 224. Rack; 23. Guide rod; 24. Mounting component; 25. Bracket; 26. Spring; 27. Insulating baffle; 3. Fixing mechanism; 31. Outer shell; 32. Liner; 33. Anti-slip protrusion. Detailed Implementation

[0016] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0017] like Figure 1-4 As shown, a tungsten-molybdenum alloy vertical melting sintering electrode clamping device includes a mounting base 1; A clamping mechanism 2 is fixedly installed at the bottom of the mounting base 1, and a fixing mechanism 3 is fixedly installed at one end of the clamping mechanism 2; The clamping mechanism 2 includes a frame 21 fixedly installed at the bottom of the mounting base 1. A transmission component 22 is fixedly installed on one side of the frame 21. The transmission component 22 is used to drive the mounting component 24 to move the fixing mechanism 3, so that the tungsten molybdenum alloy rod is clamped inside the fixing mechanism 3. The transmission component 22 is also used to drive the bracket 25 to move the insulating baffle 27 vertically, so that the insulating baffle 27 abuts against the top of the tungsten molybdenum alloy rod.

[0018] See attached document Figure 1 and Figure 2 In this embodiment, a guide rod 23 is fixedly installed inside the frame 21, and mounting parts 24 are mirror images of the two sides of the frame 21, with the two sets of mounting parts 24 slidably installed on both sides of the surface of the guide rod 23.

[0019] In the above embodiment, the bottom of the mounting component 24 is fixedly installed to the fixing mechanism 3 by using bolts. Therefore, in actual use, it can be replaced according to the different tungsten-molybdenum alloy rods, thereby improving its practicality.

[0020] Furthermore, the tops of the two sets of mounting parts 24 are threadedly installed with the transmission assembly 22, while the transmission assembly 22 is slidably installed with the frame 21 through the guide rod 23. Therefore, during the operation of the transmission assembly 22, it can move linearly through the limit of the guide rod 23, thereby driving the fixing mechanism 3 to clamp and fix the tungsten-molybdenum alloy rod.

[0021] Based on the above structure, please refer to the appendix for details. Figure 2 and Figure 3 The transmission assembly 22 includes a motor 221 fixedly installed on one side of the frame 21. The motor 221 can be started to drive the transmission gear set 222 to rotate the bidirectional screw 223. Since the bidirectional screw 223 is threadedly installed with the mounting part 24, the synchronous opposite movement of the two sets of mounting parts 24 can be realized, thus realizing the clamping and release of the fixing mechanism 3.

[0022] Specifically, a rack 224 is vertically slidably mounted inside the frame 21 via a mounting frame, while the rack 224 is horizontally slidably mounted with the mounting frame and the bracket 25. An adjusting screw is rotatably mounted inside the bracket 25, and the bottom of the rack 224 is threadedly mounted with the adjusting screw.

[0023] More specifically, by manually rotating the adjusting screw, the rack 224 can be driven to mesh with the transmission gear set 222. Therefore, during the process of the transmission assembly 22 driving the fixing mechanism 3 to clamp the tungsten-molybdenum alloy rod, the transmission gear set 222 can push the insulating baffle 27 to move vertically through the rack 224 and the bracket 25, so that the insulating baffle 27 abuts the tungsten-molybdenum alloy rod against the inside of the fixing mechanism 3. At the same time, since there is a spring 26 between the insulating baffle 27 and the bracket 25, elastic potential energy can be stored through the spring 26. Thus, when the molybdenum alloy rod experiences tensile stress during the vertical melting sintering process, the spring 26 and the insulating baffle 27 can adaptively compensate, thereby improving the yield.

[0024] See attached document Figure 1 and Figure 4 In this embodiment, the fixing mechanism 3 includes a housing 31 fixedly installed at the bottom of the clamping mechanism 2. An inner liner 32 is fixedly installed inside the housing 31, and a number of anti-slip protrusions 33 are evenly arranged inside the inner liner 32.

[0025] In the above embodiment, two sets of fixing mechanisms 3 are provided and are arranged in a mirror image on both sides of the bottom of the clamping mechanism 2. The clamping mechanism 2 is used to drive the two sets of fixing mechanisms 3 to move synchronously and in opposite directions, so that the tungsten-molybdenum alloy rod is clamped inside the fixing mechanism 3.

[0026] Furthermore, the inner liner 32 is made of a material with high thermal conductivity and high resistivity, and its working surface is an arc-shaped concave surface that matches the outer circumferential surface of the tungsten-molybdenum alloy rod, which serves as the electrode workpiece. The anti-slip protrusions 33 installed inside the inner liner 32 are used to increase contact resistance and improve the anti-slip performance of the tungsten-molybdenum alloy rod.

[0027] As can be further explained, a cooling channel can also be provided inside the outer casing 31. The cooling channel can be a spiral or annular channel for introducing deionized water or inert gas. Through the design of the cooling channel, the temperature of the fixing mechanism 3 can be effectively reduced, the service life can be extended, and the impact of heat radiation on the workpiece can be reduced.

[0028] The working principle of this utility model is as follows: By rotating the adjusting screw, the rack 224 meshes with the transmission gear set 222. By placing the tungsten-molybdenum alloy rod between the two sets of fixing mechanisms 3 and starting the transmission assembly 22, the motor 221 drives the bidirectional screw 223 to rotate, so that the rack 224 drives the fixing mechanism 3 to clamp and fix the tungsten-molybdenum alloy rod. During the clamping process, since the bottom of the fixing mechanism 3 is tapered, the rack 224 pushes the bracket 25 to move down, and the bracket 25 pushes the insulating baffle 27 and the top of the tungsten-molybdenum alloy rod to move down synchronously, so that the bottom of the tungsten-molybdenum alloy rod abuts against the tapered surface of the bottom of the fixing mechanism 3. At the same time, the spring 26 stores elastic potential energy, so that when the tungsten-molybdenum alloy rod experiences tensile stress during the vertical melting and sintering process, the spring 26 and the insulating baffle 27 can adaptively compensate, thereby improving the yield.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A clamping device for a tungsten-molybdenum alloy vertical melting sintered electrode, characterized in that, include: Mounting base (1); A clamping mechanism (2) is fixedly installed at the bottom of the mounting base (1), and a fixing mechanism (3) is fixedly installed at one end of the clamping mechanism (2). The clamping mechanism (2) includes a frame (21) fixedly installed at the bottom of the mounting base (1). A transmission component (22) is fixedly installed on one side of the frame (21). The transmission component (22) is used to drive the mounting component (24) to move the fixing mechanism (3) so that the tungsten molybdenum alloy rod is clamped inside the fixing mechanism (3). The transmission component (22) is used to drive the bracket (25) to move the insulating baffle (27) vertically so that the insulating baffle (27) abuts against the top of the tungsten molybdenum alloy rod.

2. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 1, characterized in that: The frame (21) is fixedly installed with a guide rod (23), and the two sides of the frame (21) are mirrored with mounting parts (24), and the two sets of mounting parts (24) are slidably installed on both sides of the surface of the guide rod (23).

3. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 2, characterized in that: The bottom of the mounting component (24) is fixedly installed with the fixing mechanism (3), and the top of the mounting component (24) is threadedly installed with the transmission assembly (22).

4. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 3, characterized in that: The transmission assembly (22) includes a motor (221) fixedly installed on one side of the frame (21), the motor (221) being used to drive the transmission gear set (222) to drive the bidirectional screw (223) to rotate.

5. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 4, characterized in that: A rack (224) is vertically slidably mounted inside the frame (21) via a mounting frame. The rack (224) is horizontally slidably mounted with the mounting frame and the bracket (25). An adjusting screw is rotatably mounted inside the bracket (25). The bottom of the rack (224) is threadedly mounted with the adjusting screw.

6. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 5, characterized in that: The adjusting screw is used to push the rack (224) to mesh with the transmission gear set (222), so that the rack (224) pushes the insulating baffle (27) to move vertically through the bracket (25), and a spring (26) abuts between the insulating baffle (27) and the bracket (25).

7. The tungsten-molybdenum alloy vertical melting sintering electrode clamping device according to claim 1, characterized in that: The fixing mechanism (3) includes a housing (31) fixedly installed at the bottom of the clamping mechanism (2), and an inner liner (32) fixedly installed inside the housing (31), and a number of anti-slip protrusions (33) are evenly arranged inside the inner liner (32).

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