A thick-gauge large-size tungsten-molybdenum plate flattening device

Abstract

The utility model relates to tungsten molybdenum plate processing technical field discloses a kind of thick gauge large size tungsten molybdenum plate straightening device, including first leveling unit, second leveling unit and limiting assembly, the first leveling unit and second leveling unit are oppositely arranged, first leveling block in first leveling unit has the outer camber surface of protruding towards the tungsten molybdenum plate to be leveled;Limiting assembly is located between first leveling unit and second leveling unit, for limiting the down pressure distance of first leveling unit.When leveling, pressure device promotes first leveling unit near second leveling unit, to make the first leveling block and tungsten molybdenum plate line contact to be leveled.It has beneficial effect in that: the pressure of pressure device when leveling will be all concentrated on the contact line of first leveling block and plate, significantly improve the local leveling effect, to improve the local bending of plate, warping.

Description

Technical Field

[0001] This utility model relates to the field of tungsten and molybdenum plate processing technology, specifically a leveling device for thick, large-size tungsten and molybdenum plates. Background Technology

[0002] Tungsten and molybdenum, refractory metals, have been widely used in many fields such as aerospace, high-end medical, glass fiber, high-temperature furnace, electronics, and weaponry due to their high melting point, elastic modulus, good electrical and thermal conductivity, high high-temperature strength, low coefficient of thermal expansion, and low resistivity.

[0003] Tungsten and molybdenum sheet products mainly achieve increased density and strength through rolling deformation. With the rapid development of the global semiconductor market, related industries such as vacuum heating furnaces and electronic instrument manufacturing are also expanding year by year. As an important raw material for the manufacturing of electronic instruments and vacuum heating furnaces, rolled tungsten and molybdenum sheet products account for an increasingly larger proportion of thick and large-size products.

[0004] Conventional thin-gauge, small-sized tungsten-molybdenum rolled plates are mainly leveled at high temperatures using multi-roll straighteners. However, for tungsten-molybdenum plates with a thickness (T) ≥ 40mm and a length and width ≥ 500mm, high-temperature flattening is currently only possible using various four-column presses. Thick-gauge, large-sized tungsten-molybdenum plates often exhibit significant localized bending or warping after high-temperature rolling. Due to limitations in press pressure, the large size of the plates, and the inherent ductility and toughness of tungsten-molybdenum plates at high temperatures, these plates experience thermal rebound after high-temperature flattening. Even after rebound, localized bending and warping persist. In cases involving TZM (molybdenum-zirconium-titanium alloy), pure tungsten, or lanthanum-tungsten high-strength tungsten-molybdenum products, complete rebound may occur, severely impacting subsequent grinding or turning processes. To ensure the normal production and processing of such slabs, there are currently two main solutions. One is to significantly increase the leveling temperature of the slab, heating it to a high temperature until it softens before leveling it using a press. However, the strength and hardness of the rolled slab will be significantly reduced after being overheated at high temperatures, making it difficult to meet performance requirements. The other solution is to increase the thickness allowance of the blank sheet by 50-100%, thereby reducing the overall processing difficulty. Even with increased thickness allowance, the slab can still be leveled using conventional temperature and methods. Even if the flatness is poor in some areas, it can be leveled during subsequent processing using the increased thickness allowance. This method can guarantee the slab performance, but the increased thickness significantly increases the rolling difficulty and production cost. Furthermore, tungsten and molybdenum, being refractory metals, have high strength at high temperatures. Conventional 300-500T presses are insufficient to level thick, large-sized tungsten and molybdenum sheets in one pass. Because leveling such slabs is difficult, each sheet needs to be leveled at least 3-5 times, and the slab must be reheated in a furnace before each leveling, which also reduces production efficiency.

[0005] To address the aforementioned issues, there is an urgent need to develop a leveling device for addressing severe bending or warping in localized areas of thick, large-sized tungsten-molybdenum plates after high-temperature rolling. Utility Model Content

[0006] The purpose of this utility model is to provide a leveling device for thick, large-size tungsten-molybdenum plates, which is highly adaptable, easy to operate, has excellent leveling effect and does not affect product performance. It can effectively handle local bending and warping of thick, large-size tungsten-molybdenum plates after high-temperature rolling.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A leveling device for thick, large-size tungsten-molybdenum plates includes:

[0009] The first leveling unit includes a first base and a first leveling block; the first leveling block extends along a first direction.

[0010] The second leveling unit includes a second base and two second leveling blocks. The two second leveling blocks are arranged along a second direction and extend along a first direction. The first base and the second base are opposite to each other along a third direction, and the first base is movable along the third direction. The first leveling block is movably disposed along the second direction on the side of the first base facing the second base, and the two second leveling blocks are movably disposed along the second direction on the side of the second base facing the first base. There is a first gap between the first leveling block and the second leveling block for accommodating the tungsten-molybdenum plate to be leveled. The first leveling block has an outer arc surface protruding towards the tungsten-molybdenum plate to be leveled. During leveling, a pressure device pushes the first base closer to the second base along the third direction so that the first leveling block makes line contact with the tungsten-molybdenum plate to be leveled, and the projection of the first leveling block along the third direction is located between the two second leveling blocks. The first direction, the second direction, and the third direction are perpendicular to each other.

[0011] A limiting component is located between the first base and the second base, and on the outside of the tungsten-molybdenum plate to be leveled. It is used to limit the downward pressing distance of the first base in a third direction so that the first leveling block can press the plate down to the negative limit during leveling.

[0012] A first driving component is used to drive the first leveling block to move along a second direction;

[0013] The second driving component is used to drive the two second leveling blocks to move along a second direction. Through the above configuration, relying on the advantages of line contact leveling and in conjunction with the limiting component, the problems of rebound after flattening thick, large-size tungsten-molybdenum plates, large thickness allowances, and poor performance after high-temperature leveling are effectively solved.

[0014] Furthermore, it also includes a guide assembly, the axis of which extends in a third direction. The guide assembly is fixed to one end face of the second base facing the first base and located on the outer side of the tungsten-molybdenum plate to be leveled. The first base is sleeved with the guide assembly so that the first base can move along the guide assembly. By providing the guide assembly, the first base can be pressed down and reset along the guide assembly, improving the stability of the movement process.

[0015] Furthermore, the guiding assembly includes multiple guide posts and corresponding return springs for each guide post. The axes of the multiple guide posts extend along a third direction, and one end of each guide post is connected to a second base and located on the outer side of the tungsten-molybdenum plate to be leveled. The return springs are sleeved on the outer periphery of their respective guide posts. The first base has guide holes corresponding to each guide post, allowing the first base to be fitted onto the guide posts. With this configuration, the first base moves along the guide posts when pressed, and after pressurization, the pressurizing device lifts up, and the return springs help the first base return to its original position.

[0016] Furthermore, the limiting component includes multiple limiting posts, the axes of which extend in a uniform third direction; the multiple limiting posts are evenly distributed between the first base and the second base, and are located on the outer side of the tungsten-molybdenum plate to be leveled.

[0017] The first ends of each of the multiple limiting posts are detachably connected to the first base, and the second ends of each of the multiple limiting posts are spaced apart from the second base; or the second ends of each of the multiple limiting posts are detachably connected to the second base, and the first ends of each of the multiple limiting posts are spaced apart from the first base. With the above configuration, the limiting assembly has a simple structure and is easy to manufacture.

[0018] Furthermore, the first driving mechanism includes a first guide rail and a first push rod; the first guide rail is disposed on one side of the first base facing the second base, and extends along a second direction; the first leveling block is movably disposed on the first guide rail; the first end of the first push rod is connected to the first leveling block; and the second end of the first push rod is a handheld part used to push the first leveling block to move along the first guide rail. With the above configuration, the first push rod can be used to push the first leveling block to move along the first guide rail, so that during leveling, it can be aligned with the curved or warped areas of the board.

[0019] Furthermore, the first base includes a first base plate and two first fixing plates; the two first fixing plates are disposed opposite each other on both sides of the first base plate along a second direction; both ends of the first guide rail are respectively connected to the two first fixing plates, and a threaded hole extending along the second direction is opened on either of the first fixing plates. The outer periphery of the first push rod has external threads so that the first push rod is threadedly connected to the threaded hole. With the above configuration, rotating the first push rod can drive the first leveling block to move along the first guide rail, and the threaded connection between the first push rod and the threaded hole can also play a fixing role, preventing the first leveling block from shifting after positioning.

[0020] Furthermore, the second driving mechanism includes a second guide rail and two second push rods. The second guide rail is disposed on one side of the second base facing the first base and extends along a second direction. The two second leveling blocks are movably disposed on the second guide rail. The first ends of the two second push rods are connected to the corresponding second leveling blocks, and the second ends of the two second push rods are handheld portions used to push the corresponding second leveling blocks to move along the second guide rail. With the above configuration, the second leveling blocks can be pushed to move along the corresponding second guide rail using the second push rods. During leveling, the two second leveling blocks can be located on both sides of the projection of the first leveling block along a third direction, providing support.

[0021] Furthermore, the second base includes a second base plate and two second fixing plates; the two second fixing plates are disposed opposite each other on both sides of the second base plate along a second direction; both ends of the second guide rail are respectively connected to the two second fixing plates, and each of the two second fixing plates has a threaded hole extending along the second direction; the outer periphery of each of the two second push rods has external threads so that the second push rods are threadedly connected to the corresponding threaded holes. With the above configuration, rotating the second push rod can drive the second leveling block to move along the second guide rail, and the threaded connection between the second push rod and the threaded hole can also play a fixing role, preventing the second leveling block from shifting after positioning.

[0022] Furthermore, both of the second leveling blocks have an outer arc surface that protrudes toward the tungsten-molybdenum plate to be leveled.

[0023] Furthermore, it also includes a pad, which is placed on the side of the first base away from the second base, through which the pressurizing device applies pressure to the first base. Because the guide post protrudes from the surface of the first base, if the output end of the pressurizing device directly contacts the first base, it may touch the guide post. Therefore, by setting the pad, the pressurizing device can directly contact the pad, ensuring accurate and interference-free pressurization.

[0024] This invention has the following advantages over the prior art:

[0025] 1. The present invention relates to a leveling device for thick, large-size tungsten-molybdenum plates, comprising a first leveling unit, a second leveling unit, a limiting component, a first driving component, and a second driving component. The first leveling unit includes a first base and a first leveling block, and the second leveling unit includes a second base and two second leveling blocks. The first base and the second base are arranged opposite each other along a third direction, and the first base is movable along the third direction to move away from or closer to the second base. The first leveling block is movably arranged along a second direction on the side of the first base facing the second base, and the two second leveling blocks are movably arranged along the second direction on the side of the second base facing the first base. The device is driven by a first driving component and a second driving component. The moving component can adjust the position of the first leveling block along the second direction, and the second driving component can adjust the position of the two second leveling blocks along the second direction so that, during leveling, the projection of the first leveling block along the third direction is located between the two second leveling blocks. The first leveling block is aligned with the bent protrusions or warped parts on the plate, and the two second leveling blocks provide support below the plate. The first leveling block has an outer arc surface that protrudes towards the tungsten-molybdenum plate to be leveled, so that the first leveling block and the pressure-bearing tungsten-molybdenum plate are in line contact. During leveling, the pressure of the pressurizing device is concentrated on the contact line, which significantly improves the local leveling effect (for local bending and warping) and effectively solves the problem of difficult leveling of such plates. A limiting component is set between the first base and the second base. The stroke range of the first base cooperates with the limiting component, so that the first leveling block can press the plate down to the negative limit during leveling, which solves the problem of rebound warping after local leveling of thick and large-size tungsten-molybdenum plates and avoids the cost increase caused by the large thickness allowance of such products. Compared to conventional presses, this device has a stronger ability to level localized bends and warps. Therefore, when using this device to level thick, large-sized tungsten molybdenum plates, there is no need to significantly increase the heating temperature, thus ensuring product performance.

[0026] 2. The thick-gauge, large-size tungsten-molybdenum plate leveling device of this utility model has a simple structure, is easy to operate, and is economical in cost. A pad is placed on the upper surface of the first base. During leveling, the pressurizing device can apply pressure to the first base through the pad, thereby preventing the guide column from interfering with the operation of the pressurizing device. By adjusting the dimensions of the pad, this device can be adapted to various four-column presses, making it suitable for large-scale production. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the thick-gauge large-size tungsten-molybdenum plate leveling device in the embodiment of this utility model;

[0028] Figure 2 This is a front view of the thick-gauge large-size tungsten-molybdenum plate leveling device in this embodiment of the present invention;

[0029] Figure 3This is a schematic diagram of the structure of the thick-gauge large-size tungsten-molybdenum plate leveling device after removing the upper substrate and limiting post in an embodiment of this utility model.

[0030] Figure 4 This is a schematic diagram of the structure of the first leveling block in the thick-gauge large-size tungsten-molybdenum plate leveling device in this embodiment of the present invention.

[0031] In the diagram: 1. First base; 101. First substrate; 102. First fixing plate; 2. First leveling block; 3. Second base; 301. Second substrate; 302. Second fixing plate; 4. Second leveling block; 5. Guide post; 6. Reset spring; 7. Limiting post; 8. First guide rail; 9. First push rod; 10. Second guide rail; 11. Second push rod; 12. Pad; 13. Outer arc surface; 14. Handle; 15. Tungsten-molybdenum plate to be leveled; Y, second direction; Z, third direction. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0036] Example:

[0037] This invention provides a leveling device for thick, large-sized tungsten-molybdenum plates that is simple to operate, provides excellent leveling results without affecting product performance, and reduces the thickness allowance of the raw plate. It solves the current problems of difficulty in leveling tungsten-molybdenum plates with a thickness (T) ≥ 40mm and a length and width (both ≥ 500mm), large thickness allowances, and poor performance after high-temperature leveling. Details are as follows:

[0038] like Figures 1 to 4As shown, this utility model provides a leveling device for thick, large-size tungsten-molybdenum plates, including: a first leveling unit, a second leveling unit, a limiting component, a first driving component, and a second driving component. The first leveling unit includes a first base 1 and a first leveling block 2; the first leveling block 2 extends along a first direction (not shown in the figure); the second leveling unit includes a second base 3 and two second leveling blocks 4; the two second leveling blocks 4 are arranged along a second direction (Y direction in the figure) and extend along the first direction; the first base 1 and the second base 3 are arranged opposite each other along a third direction (Z direction in the figure), and the first base 1 is movable along the third direction; the first leveling unit... The leveling block 2 is movably disposed along the second direction on the side of the first base 1 facing the second base 3. Two second leveling blocks 4 are movably disposed along the second direction on the side of the second base 3 facing the first base 1. A first gap exists between the first leveling block 2 and the second leveling blocks 4 for accommodating the tungsten-molybdenum plate 15 (also referred to as the plate) to be leveled. The first leveling block 2 has an outer arc surface 13 protruding towards the tungsten-molybdenum plate 15. During leveling, a pressure device (commonly a four-column press, etc.) pushes the first base 1 closer to the second base 3 along the third direction, so that the first leveling block 2 makes line contact with the tungsten-molybdenum plate 15 to be leveled, and the first leveling block 2 along the third direction... The projection of the direction is located between the two second leveling blocks 4; the first direction, the second direction, and the third direction are perpendicular to each other; the limiting component is located between the first base 1 and the second base 3, and is located outside the tungsten-molybdenum plate 15 to be leveled, and is used to limit the downward pressing distance of the first base 1 along the third direction, so that when leveling, the first leveling block 2 can press the plate down to the negative limit (pressing the plate down to the negative limit means: pressing the lower surface of the plate down to below the plane where the highest point of the two second leveling blocks 4 is located; the negative limit distance means: the distance between the lowest point of the lower surface of the plate after pressing down and the plane where the highest point of the two second leveling blocks 4 is located, the range of the negative limit distance is 0-8mm, for example For example, 0mm, 1mm, 3mm, 5mm, 7mm, 8mm, etc. In specific implementation, if the curvature of the board is small and it is not necessary to press down to the negative limit, the negative limit distance can be selected as 0mm. To further understand the negative limit, the positive limit and zero limit are defined as follows: the positive limit means that the lower surface of the board is above the plane where the highest points of the two second leveling blocks are located; the zero limit means that the lower surface of the board is flush with the plane where the highest points of the two second leveling blocks are located. The first driving component is used to drive the first leveling block 2 to move along the second direction. The position of the first leveling block 2 is adjusted by the first driving component so that it can be aligned with the curvature or warping of the board. The second driving component is used to drive the two second leveling blocks 4 to move along the second direction. The position of the two second leveling blocks 4 is adjusted by the second driving component so that they can be adjusted according to the position of the first leveling block 2 to correspond to both sides of the projection of the first leveling block 2 along the third direction, so as to play a supporting role.

[0039] During leveling, the first leveling block, under pressure from the pressurizing device, makes line contact with the tungsten-molybdenum sheet to be leveled (15), while the two second leveling blocks (4) provide support. This device, relying on the advantages of line contact leveling and in conjunction with the limiting components, concentrates all the pressure from the pressurizing device on the contact line, significantly improving the local leveling effect (for localized bending and warping). The first leveling block (2) can press the sheet down to the negative limit, effectively solving the problems of rebound after flattening thick, large-size tungsten-molybdenum sheets, large thickness allowances, and poor performance after high-temperature leveling.

[0040] refer to Figures 1-3 It also includes a guide assembly, the axis of which extends in a third direction. The guide assembly is fixed to one end face of the second base 3 facing the first base 1 and located outside the tungsten-molybdenum plate 15 to be leveled. The first base 1 is sleeved with the guide assembly so that the first base 1 can move along the guide assembly. By setting the guide assembly, the first base can move downward along the guide assembly when pressure is applied. When the pressurizing device is lifted, the guide assembly can help the first base 1 return to its original position, waiting for the next pressurization. In addition, setting the guide assembly can also ensure the stability of the first base 1 during movement and prevent it from shifting.

[0041] Specifically, the guiding assembly includes multiple guide posts 5 and corresponding return springs 6. The axes of the multiple guide posts 5 extend along a third direction, and one end of each guide post 5 is connected to a second base 3 and located on the outer side of the tungsten-molybdenum plate 15 to be leveled. The return spring 6 is sleeved on the outer periphery of the corresponding guide post 5. The first base 1 has guide holes corresponding to the guide posts 5, so that the first base 1 is sleeved on the guide posts 5. With the above configuration, the guiding assembly has a simple structure and is located on the outer side of the tungsten-molybdenum plate 15 to be leveled, and will not obstruct the entry and exit of the tungsten-molybdenum plate 15 into and out of the first gap. During the leveling process, the first base 1 moves along the guide post 5 when pressed. After the pressurization is completed, the pressurization device is lifted, and the return spring 6 helps the first base 1 to return to its original position.

[0042] refer to Figures 1-3 The limiting component includes multiple limiting posts 7, the axes of which extend in a uniform third direction; the multiple limiting posts 7 are evenly distributed between the first base 1 and the second base 3, and are located on the outside of the tungsten molybdenum plate 15 to be leveled; with the above arrangement, the limiting posts 7 will not block the tungsten molybdenum plate 15 to be leveled from entering and exiting the first gap.

[0043] Specifically, the first ends of each of the multiple limiting posts 7 are detachably connected to the first base 1, and the second ends of each of the multiple limiting posts 7 have a second gap between them and the second base 3. The value of the second gap is equal to the value of the first gap minus the thickness of the tungsten-molybdenum plate to be leveled plus a negative limiting distance (i.e., the value of the second gap is equal to the total pressing stroke of the first leveling block). During leveling, by determining the size of the second gap, it is ensured that when the first leveling block is pressed down, a negative limit is reached (the lower surface of the plate is pressed down to below the plane where the highest points of the two second leveling blocks 4 are located), while avoiding excessive pressing of the first leveling block that could cause brittle fracture of the plate. In implementation, the first end of the limiting post 7 is threadedly connected to the first base 1, thus facilitating the replacement of limiting posts 7 of different lengths to accommodate plates of different thicknesses. When the limiting post 7 is connected to the first base 1 and has a second gap with the second base 3, limiting blocks of different thicknesses can also be placed directly below the limiting post 7 to adjust the size of the second gap.

[0044] In another embodiment, the second ends of each of the plurality of limiting posts 7 are detachably connected to the second base 3, and the first ends of each of the plurality of limiting posts 7 have a second gap between them and the first base 1 (this second gap is the same as described above). In actual use, there are no restrictions on whether the limiting posts 7 are threaded to the first base or the second base, as long as it is convenient for installation and replacement. With the above settings, the limiting component has a simple structure and is easy to manufacture.

[0045] refer to Figure 3 and Figure 4 The first driving mechanism includes a first guide rail 8 and a first push rod 9. There are two first guide rails 8, arranged along a first direction and extending along a second direction. Both first guide rails 8 are located on the side of the first base 1 facing the second base 3. The first leveling block 2 is movably mounted on the two first guide rails 8. The first end of the first push rod 9 is connected to the first leveling block 2, and the second end of the first push rod 9 is a handle for pushing the first leveling block 2 along the first guide rail 8. With this configuration, the two first guide rails 8 jointly support the first leveling block 2, improving its stability. The first push rod 9 can be used to push the first leveling block 2 along the first guide rail 8, allowing it to align with the bent or warped areas of the board during leveling. The handle 14 on the handle of the first push rod 9 facilitates cranking.

[0046] refer to Figure 1 and Figure 2The first base 1 includes a first base plate 101 and two first fixing plates 102. The two first fixing plates 102 are disposed opposite each other on both sides of the first base plate 101 along a second direction. The two ends of the two first guide rails 8 are respectively connected to the two first fixing plates 102. A threaded hole is opened on either of the first fixing plates 102 along the second direction. The outer periphery of the first push rod 9 has an external thread so that the first push rod 9 is threadedly connected to the threaded hole. The first push rod 9 is rotatably connected to the first leveling block 2, so that the first leveling block 2 can be moved along the first guide rail 8 by rotating the first push rod 9. Moreover, the threaded connection between the first push rod 9 and the threaded hole can also play a fixing role, preventing the first leveling block 2 from shifting after positioning.

[0047] The operating principle of the second drive mechanism is the same as that of the first drive mechanism. Specifically, the second drive mechanism includes a second guide rail 10 and two second push rods 11. There are two second guide rails 10, arranged along a first direction and extending along a second direction. Both second guide rails 10 are located on the side of the second base 3 facing the first base 1. Two second leveling blocks 4 are movably mounted on the two second guide rails 10. The first ends of the two second push rods 11 are connected to the corresponding second leveling blocks 4, and the second ends of the two second push rods 11 are handheld parts used to push the corresponding second leveling blocks 4 along the second guide rails 10. Through this arrangement, the two second guide rails 10 jointly support the second leveling blocks 4, improving their stability. The second push rods 11 can be used to push the second leveling blocks 4 along the corresponding second guide rails 10. During leveling, the two second leveling blocks 4 are moved to both sides of the projection of the first leveling block 2 along a third direction, providing support. The handheld parts of the second push rods 11 have handles 14 for easy cranking.

[0048] The second base 3 includes a second base plate 301 and two second fixing plates 302. The two second fixing plates 302 are disposed opposite each other on both sides of the second base plate 301 along a second direction. The two ends of the second guide rail 10 are respectively connected to the two second fixing plates 302. Each of the two second fixing plates 302 has a threaded hole extending along the second direction. The outer circumference of each of the two second push rods 11 has external threads, so that the second push rods 11 are threadedly connected to the corresponding threaded holes. The second push rods 11 are rotatably connected to the corresponding second leveling blocks 4. Thus, rotating the second push rods 11 can move the second leveling blocks 4 along the second guide rail 10. Furthermore, the threaded connection between the second push rods 11 and the threaded holes also serves a fixing function, preventing the second leveling blocks 4 from shifting after positioning. (Reference) Figure 4The two second leveling blocks 4 have the same structure as the first leveling block 2, both having an outer arc surface protruding towards the tungsten-molybdenum plate 15 to be leveled. By also setting the second leveling block 4 to have an outer arc surface protruding towards the tungsten-molybdenum plate 15 to be leveled, friction can be reduced when pushing the plate, making it easier to push the plate; during leveling, the first and second leveling blocks achieve three-point line contact support for the plate, resulting in a better leveling effect.

[0049] It also includes a pad 12, which is placed on the side of the first base 1 away from the second base 3. The pressurizing device applies pressure to the first base 1 through the pad 12. Because the guide post 5 protrudes from the surface of the first base 1, if the output end of the pressurizing device directly contacts the first base 1, it may touch the guide post 5. Therefore, by setting the pad 12, the pressurizing device can directly contact the pad 12, ensuring accurate and interference-free pressurization.

[0050] This device mainly consists of a first base plate 101, a first fixing plate 102, a first leveling block 2, a second base plate 301, a second fixing plate 302, a second leveling block 4, a guide post 5, a reset spring 6, a limiting post 7, a first guide rail 8, a first push rod 9, a second guide rail 10, and a second push rod 11. Each component is assembled separately (threaded connection, bolt connection, or clearance fit) to form a tungsten molybdenum plate leveling fixture.

[0051] refer to Figures 1-3In this device, the first leveling block 2 and the second leveling block 4 are key components. Relying on the advantages of line contact leveling and the stroke coordination with the limiting post, they play a crucial role in the leveling process of thick, large-sized tungsten-molybdenum plates. The first fixing plate 102, the second fixing plate 302, the guide post 5, the pad 12, the first guide rail 8, the second guide rail 10, the first push rod 9, and the second push rod 11 are made of 45# steel. The first base plate 101, the second base plate 301, the first leveling block 2, the second leveling block 4, and the limiting post 7 are all made of H13 mold steel. The reset spring 6 is made of 50CrVA spring steel. The first substrate 101, the second substrate 301, and the corresponding first fixing plate 102 and second fixing plate 302 are fixed together with screws; the pad 12 is placed on the upper surface of the first substrate 101 to bear the pressure of the four-column press; the corresponding guide rails are fixed together with nuts; the first substrate 101 and the four guide columns 5, the first leveling block 2 and the first guide rail 8, and the second leveling block 4 and the second guide rail 10 are all fitted with small clearances to facilitate the movement of the first substrate 101, the first leveling block 2, and the second leveling block 4; the guide columns The first substrate 101 and the second substrate 301 are assembled using an interference fit; the push rod and the corresponding fixing plate are threaded together, which can prevent the force displacement of the leveling block during leveling, and the leveling block can also be moved laterally by shaking the handle 14; the first substrate 101 and the eight limiting posts are also assembled using a threaded fit; the four return springs 6 are respectively fitted on the guide post 5 between the first and second substrates, which are responsible for supporting the entire first substrate 101; after the device is assembled as a whole in the above manner, it can ensure the stability of the structure when placed on the four-column press platform for force leveling.

[0052] This utility model's leveling device for thick, large-size tungsten-molybdenum plates fully considers the problems of rebound after flattening, large thickness allowance, and poor performance after high-temperature leveling. The following describes how to use this device:

[0053] Preparation before leveling: First, check that the connections between all components are secure. After confirming there are no abnormalities, use a forklift and auxiliary equipment to place the entire device on the four-column press platform. Once properly placed, place the pad 12 at the center of the upper surface of the first substrate 101. Next, place the tungsten-molybdenum plate to be leveled on the horizontal platform. The leveling operator, based on the degree of warping or bending of the plate, determines the specific leveling position, leveling plane, and the pressing stroke of the first leveling block 2. Finally, select a suitable length of limiting post 7 or add a limiting block below the limiting post 7 according to the set pressing stroke, so that the second interval allows the first leveling block to press the plate down to the negative limit. For bent or warped parts of the plate, during leveling, the portion of the plate protruding from the plate surface due to bending or warping should face the first leveling block. If the protrusion caused by bending is located on the lower surface of the plate, the plate needs to be flipped over during leveling so that the portion protruding from the plate surface faces the first leveling block.

[0054] Leveling process: First, shake the second push rod 11 of the two second leveling blocks 4. After the two second leveling blocks 4 are in the right position, place the unheated tungsten molybdenum plate 15 to be leveled on the second leveling block 4. Then shake the first push rod 9 of the first leveling block 2 until the first leveling block 2 moves to the leveling position. After the adjustment is completed, load the tungsten molybdenum plate to be leveled into the heating furnace for heating. When the plate is heated to the appropriate temperature, pull the plate out of the furnace and place it on the second leveling block 4 again. After the billet reaches the designated position, start the press to complete the billet leveling.

[0055] This embodiment uses TZM alloy as an example to illustrate the process: the slab is 740mm long, 660mm wide, and 64.5mm thick, weighing 320kg. The finished product dimensions are 60*600*680mm (thickness*width*length). The guide post diameter is 35mm, and the guide rail and push rod diameters are both 40mm. The handle size needs to be matched with the push rod diameter and ease of operation. Due to the support of the return spring, the height difference between the lowest point of the first leveling block and the highest point of the second leveling block is 100mm (the first interval is 100mm). The return spring needs to be selected based on the total weight supported, the guide post diameter, and the height difference between the first and second leveling blocks. The specific dimensions and outer arc surfaces of the first and second leveling blocks need to be designed based on the slab thickness range and press pressure. The first and second base plates need to be designed based on the slab length, width range, and press pressure, and the corresponding pad dimensions need to be designed based on the dimensions of the upper base plate. The diameter of the limiting post needs to be determined in conjunction with the press pressure. Other dimensions can be set proportionally according to actual conditions. The aforementioned 64.5*660*740mm (thickness*width*length) TZM slab was first flattened once using a 500T four-column press after rolling. However, due to limitations in press structure, plate thickness, product performance requirements, and slab thermal rebound, the localized bending generated during rolling was not effectively corrected, and the slab still exhibited severe warping. After assessing the slab warping, it was determined that leveling would be performed at the halfway and one-third lengths of the slab. At the halfway point, the final limit of the first leveling block was -4mm (i.e., a negative limit distance of 4mm), and the total stroke was 39.5mm (because the height difference between the lowest point of the first leveling block and the highest point of the second leveling block is 100mm, the plate thickness is 64.5mm, and the final limit is -4mm, therefore the total stroke of the first leveling block is 39.5mm). At one-third... The final limit of the first leveling block at the location is -2mm (i.e., the negative limit distance is 2mm), and the total pressing stroke is 37.5mm (because the height difference between the lowest point of the first leveling block and the highest point of the second leveling block is 100mm, the plate thickness is 64.5mm, and the final limit is -2mm, the total pressing stroke of the first leveling block is 37.5mm). The pressure equipment used is a 300T four-column press. After segmental leveling, the overall flatness of the slab is <2mm, which meets the requirements of subsequent processing.

[0056] For rolled plates with only minor local warping or bending, there is no need to flatten the entire plate; this device can be used only for local leveling.

[0057] The thick, large-size tungsten-molybdenum plate leveling device described in this implementation is inexpensive, simple in structure, and easy to operate, making it suitable for mass production. It not only fully leverages the advantages of line contact leveling but also avoids thermal rebound after plate leveling. The device has a simple structure and is easy to operate; by adjusting its dimensions, it can be adapted to various four-column presses, facilitating mass production. This device solves the problems of difficulty in leveling tungsten-molybdenum plates with a thickness (T) ≥ 40mm and length and width (both ≥ 500mm), large thickness allowances, and poor performance after high-temperature leveling. It significantly assists in the mass and stable production of thick, large-size TZM, pure tungsten, and lanthanum tungsten-molybdenum plates.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leveling device for thick, large-size tungsten-molybdenum plates, characterized in that, include: The first leveling unit includes a first base and a first leveling block; The first leveling block extends along the first direction; The second leveling unit includes a second base and two second leveling blocks; Two second leveling blocks are arranged along a second direction and extend along a first direction; the first base and the second base are disposed opposite each other along a third direction, and the first base is movable along the third direction; the first leveling block is movably disposed along the second direction on the side of the first base facing the second base, and two second leveling blocks are movably disposed along the second direction on the side of the second base facing the first base, with a first gap between the first leveling block and the second leveling block for accommodating the tungsten-molybdenum plate to be leveled, and the first leveling block has an outer arc surface protruding towards the tungsten-molybdenum plate to be leveled; during leveling, a pressure device pushes the first base closer to the second base along the third direction so that the first leveling block makes line contact with the tungsten-molybdenum plate to be leveled, and the projection of the first leveling block along the third direction is located between the two second leveling blocks; the first direction, the second direction, and the third direction are perpendicular to each other; A limiting component is located between the first base and the second base, and on the outside of the tungsten-molybdenum plate to be leveled. It is used to limit the downward pressing distance of the first base in a third direction so that the first leveling block can press the plate down to the negative limit during leveling. A first driving component is used to drive the first leveling block to move along a second direction; The second drive component is used to drive the two second leveling blocks to move along the second direction.

2. The thick-gauge large-size tungsten-molybdenum plate leveling device according to claim 1, characterized in that: It also includes a guide assembly, the axis of which extends in a third direction. The guide assembly is fixed to one end face of the second base facing the first base and located on the outside of the tungsten-molybdenum plate to be leveled. The first base is sleeved with the guide assembly so that the first base can move along the guide assembly.

3. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 2, characterized in that: The guide assembly includes multiple guide posts and a return spring corresponding to each guide post; the axes of the multiple guide posts extend along a third direction, one end of each guide post is connected to a second base and located on the outside of the tungsten-molybdenum plate to be leveled, the return spring is sleeved on the outer periphery of the corresponding guide post, and the first base has guide holes corresponding to each guide post so that the first base is sleeved on the guide post.

4. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 1, characterized in that: The limiting component includes multiple limiting posts, the axes of which extend in a uniform third direction; the multiple limiting posts are evenly distributed between the first base and the second base, and are located on the outside of the tungsten-molybdenum plate to be leveled. The first ends of the plurality of limiting posts are detachably connected to the first base, and the second ends of the plurality of limiting posts are separated from the second base by a second gap; or the second ends of the plurality of limiting posts are detachably connected to the second base, and the first ends of the plurality of limiting posts are separated from the first base by a second gap.

5. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 1, characterized in that: The first driving mechanism includes a first guide rail and a first push rod; the first guide rail is disposed on one side of the first base facing the second base and extends along a second direction; the first leveling block is movably disposed on the first guide rail; the first end of the first push rod is connected to the first leveling block; and the second end of the first push rod is a handheld part for pushing the first leveling block to move along the first guide rail.

6. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 5, characterized in that: The first base includes a first base plate and two first fixing plates; the two first fixing plates are disposed opposite each other on both sides of the first base plate along a second direction; the two ends of the first guide rail are respectively connected to the two first fixing plates, and a threaded hole is opened on either of the first fixing plates along the second direction; the outer periphery of the first push rod has an external thread so that the first push rod is threadedly connected to the threaded hole.

7. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 1, characterized in that: The second drive mechanism includes a second guide rail and two second push rods; the second guide rail is disposed on one side of the second base facing the first base and extends along a second direction; the two second leveling blocks are movably disposed on the second guide rail; the first ends of the two second push rods are connected to the corresponding second leveling blocks; the second ends of the two second push rods are handheld parts for pushing the corresponding second leveling blocks to move along the second guide rail.

8. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 7, characterized in that: The second base includes a second base plate and two second fixing plates; the two second fixing plates are disposed opposite each other on both sides of the second base plate along a second direction; the two ends of the second guide rail are respectively connected to the two second fixing plates, and threaded holes are opened on both second fixing plates along the second direction; the outer periphery of the two second push rods has external threads so that the second push rods are threadedly connected to the corresponding threaded holes.

9. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 1, characterized in that: Both of the second leveling blocks have an outer arc surface that protrudes toward the tungsten-molybdenum plate to be leveled.

10. The leveling device for thick, large-size tungsten-molybdenum plates according to claim 9, characterized in that: It also includes a pad, which is placed on the side of the first base away from the second base, and the pressurizing device applies pressure to the first base through the pad.

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