Hot-rolled molybdenum plate grain refinement device

Abstract

The utility model discloses a hot-rolled molybdenum plate grain refinement device which comprises a first rolling assembly rolling in the length direction of a molybdenum plate, a second rolling assembly rolling in the direction perpendicular to the length direction of the molybdenum plate and a transfer platform. The upper end face of the transfer platform is provided with a first transfer waiting area which is located at the output end of the first rolling assembly and used for bearing molybdenum plates rolled by the first rolling assembly, and a second transfer waiting area which is located at the input end of the second rolling assembly and used for bearing molybdenum plates conveyed to the second rolling assembly. Molybdenum plates can advance in the width direction instead of the length direction, the advancing direction of the molybdenum plates can be converted, and hot rolling of the second rolling assembly is facilitated. The length direction centering mechanism used for enabling the long edge of the molybdenum plate to directly face the input end of the second rolling assembly is arranged above the second waiting area, the position of the molybdenum plate in the left-right direction can be conveniently adjusted, the long edge of the molybdenum plate tends to directly face the input end opening of the second rolling assembly, and the hot rolling effect of the second rolling assembly is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of molybdenum plate production equipment, and in particular relates to a device for refining grains in hot-rolled molybdenum plates. Background Technology

[0002] Hot rolling is the first step in the production of molybdenum plates. This step not only changes the geometric shape but also transforms the microstructure from the sintered state to the processed state, thereby altering the mechanical and technological properties of the slab and laying a good foundation for subsequent processing. Experimental analysis revealed that in the existing process, the low heating temperature of the molybdenum billet (1200℃) and the small initial deformation rate (29%) result in insufficient rolling pressure to allow deformation to penetrate deep into the center of the rolled piece. This leads to uneven deformation between the surface layer and the center, often causing defects such as cracking and delamination at the ends of the rolled piece. Furthermore, the unidirectional rolling process generates banded cellular structures within the molybdenum plate, resulting in significant anisotropy. Therefore, the key to solving this problem lies in improving the heating temperature, initial deformation rate, and rolling method to obtain molybdenum plates with an ideal microstructure.

[0003] Experimental studies revealed that the test billet was a powder metallurgy sintered slab. The new process increased the rolling temperature of the first pass during hot rolling from 1200℃ to 1250℃, and the initial deformation rate from 29% to 37.5%. During hot rolling, a cross-rolling method (rolling once along the length of the molybdenum plate and once perpendicular to the length) was used. Microscopic analysis showed that the molybdenum plate rolled using the new process had a fine, uniform, and densely distributed fibrous grain structure. In contrast, the molybdenum plate rolled using the old process had a coarser and shorter fibrous structure, less compact grain interfaces, and uneven deformation. Therefore, the microstructure of the molybdenum plate rolled using the new process is superior.

[0004] In the new process, when cross-rolling molybdenum plate blanks, the molybdenum plate blank needs to be rolled once along the length of the molybdenum plate and then rolled once perpendicular to the length of the molybdenum plate. Therefore, the forward direction of the molybdenum plate needs to be changed during the interval between the two hot rolling processes. The existing method of changing the forward direction of the molybdenum plate is mostly done manually, which has a high risk factor, long operation time, and makes it difficult to ensure that the long side of the molybdenum plate is aligned with the input end of the second rolling assembly. This is not convenient for rolling the molybdenum plate and can easily affect the rolling quality of the molybdenum plate blank. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a grain refinement device for hot-rolled molybdenum plates to solve the technical problems mentioned in the background art.

[0006] This utility model provides the following technical solution:

[0007] A hot-rolled molybdenum plate grain refinement device includes a first rolling assembly for rolling along the length direction of the molybdenum plate and a second rolling assembly for rolling along the direction perpendicular to the length direction of the molybdenum plate. It also includes a transfer platform. A first transfer area and a second transfer area are respectively provided at the front and rear ends of the upper surface of the transfer platform. The first transfer area is located at the output end of the first rolling assembly and is used to carry the molybdenum plate rolled by the first rolling assembly. The second transfer area is located at the input end of the second rolling assembly and is used to carry the molybdenum plate being conveyed to the second rolling assembly. A pushing mechanism is also provided at the front end of the upper surface of the transfer platform for pushing the molybdenum plate from the first transfer area to the second transfer area and from the second transfer area to the second rolling assembly. A mechanism is provided above the second transfer area on the transfer platform for centering the long side of the molybdenum plate along its length direction relative to the input end of the second rolling assembly.

[0008] Preferably, the length direction of the first rolling assembly is perpendicular to the length direction of the second rolling assembly, the transfer platform is located at the output end of the first rolling assembly and the input end of the second rolling assembly, and the upper end of the conveying roller of the first rolling assembly, the upper end of the conveying roller of the second rolling assembly, and the upper surface of the transfer platform are on the same horizontal plane.

[0009] Preferably, the pushing mechanism includes a first connecting seat and a first telescopic cylinder disposed at the front end of the upper end of the transfer platform. The first telescopic cylinder is arranged in a horizontal front-back direction. The cylinder body of the first telescopic cylinder is connected to the first connecting seat. A first push plate is disposed at the piston rod end of the first telescopic cylinder. The first push plate is arranged perpendicular to the transfer platform, and the length direction of the first push plate is arranged in a horizontal left-right direction.

[0010] Preferably, a baffle is provided on the upper surface of the transfer platform on the side of the first waiting area away from the first rolling assembly, and the length direction of the baffle is arranged in a horizontal front-to-back direction.

[0011] Preferably, there are several first telescopic cylinders, which are arranged at equal intervals along the length of the first push plate, and the several first telescopic cylinders work synchronously.

[0012] Preferably, the length-direction centering mechanism includes a top plate located above the second waiting area. The length direction of the top plate is horizontally oriented, and a rectangular opening is provided vertically along its length direction. A first vertical plate and a second vertical plate are respectively provided on the left and right sides of the lower end of the top plate. A driving component is provided in the rectangular opening for moving the first vertical plate and the second vertical plate closer to each other and further away from each other.

[0013] Preferably, the drive assembly includes a double-threaded lead screw, the axial direction of which is arranged along the length of the rectangular opening. The left and right ends of the double-threaded lead screw are respectively connected to the inner wall of the rectangular opening via bearings. The left and right ends of the double-threaded lead screw are respectively provided with a first thread and a second thread. The first thread and the second thread have the same pitch but opposite directions. A first ball nut block for connecting to the upper end of the first vertical plate is adapted on the first thread, and a second ball nut block for connecting to the upper end of the second vertical plate is adapted on the second thread. A forward and reverse motor for rotating the double-threaded lead screw is provided at the left end of the top plate.

[0014] Preferably, the drive assembly further includes a guide rod, the axial direction of which is arranged along the length direction of the rectangular opening, and the left and right ends of the guide rod are respectively connected to the inner wall of the rectangular opening. The upper ends of the first vertical plate and the second vertical plate are respectively provided with guide cylinders adapted to the guide rod.

[0015] Preferably, the output end of the first rolling assembly is further provided with a pushing mechanism for pushing the rolled molybdenum plate to the first waiting area. The pushing mechanism includes two second telescopic cylinders, both arranged along the length direction of the first rolling assembly. The cylinder bodies of the two second telescopic cylinders are respectively located on both sides of the first rolling assembly via pads. A movable plate is connected between the piston rods of the two second telescopic cylinders. The length direction of the movable plate is arranged in a horizontal front-back direction. A third telescopic cylinder is arranged vertically downward on the movable plate. The cylinder body of the third telescopic cylinder is connected to the movable plate. A pusher plate is provided at the lower end of the third telescopic cylinder. The length direction of the pusher plate is arranged in a horizontal front-back direction.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention discloses a hot-rolled molybdenum plate grain refinement device. By setting up a transfer platform between a first rolling assembly and a second rolling assembly, and by setting up a first transfer area at the output end of the first rolling assembly for carrying the molybdenum plate after rolling, and a second transfer area at the input end of the second rolling assembly for carrying the molybdenum plate to be transported to the second rolling assembly, the device enables the conversion of the molybdenum plate's forward movement along its length direction to its width direction, facilitating hot rolling in the second rolling assembly. Furthermore, by setting up a length-direction centering mechanism above the second transfer area to align the long side of the molybdenum plate with the input end of the second rolling assembly, the device facilitates adjustment of the molybdenum plate's left-right position, ensuring the long side of the molybdenum plate is aligned with the input port of the second rolling assembly, thus improving the hot rolling effect of the second rolling assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the transfer platform structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the length-direction centering mechanism of this utility model.

[0022] Figure 4 This is a schematic diagram of the actuation mechanism of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] This utility model provides a device for refining the grains of hot-rolled molybdenum plates, referenced... Figure 1The assembly includes a first rolling assembly 2 rolled along the length of the molybdenum plate 1 and a second rolling assembly 3 rolled perpendicular to the length of the molybdenum plate 1. The length directions of the first rolling assembly 2 and the second rolling assembly 3 are arranged perpendicularly to each other. It also includes a transfer platform 4 located at the output end of the first rolling assembly 2 and the input end of the second rolling assembly 3. The upper ends of the conveying rollers of the first rolling assembly 2, the upper ends of the conveying rollers of the second rolling assembly 3, and the upper surface of the transfer platform 4 are on the same horizontal plane. A first waiting area 5 and a second waiting area 5 are respectively provided at the front and rear ends of the upper surface of the transfer platform 4. Zone 6, the first waiting zone 5 is located at the output end of the first rolling assembly 2 and is used to carry the molybdenum plate 1 rolled by the first rolling assembly 2. The second waiting zone 6 is located at the input end of the second rolling assembly 3 and is used to carry the molybdenum plate 1 being conveyed to the second rolling assembly 3. The front end of the upper surface of the transfer platform 4 is also provided with a pushing mechanism 7 for pushing the molybdenum plate 1 from the first waiting zone 5 to the second waiting zone 6 and from the second waiting zone 6 to the second rolling assembly 3. The transfer platform 4 is located above the second waiting zone 6 and is provided with a mechanism 8 for centering the long side of the molybdenum plate 1 in the length direction so that it is aligned with the input end of the second rolling assembly 3. By setting a transfer platform 4 between the first rolling assembly 2 and the second rolling assembly 3, and setting a first transfer area 5 at the output end of the first rolling assembly 2 for carrying the molybdenum plate rolled by the first rolling assembly and a second transfer area 6 at the input end of the second rolling assembly 3 for carrying the molybdenum plate to be conveyed to the second rolling assembly, the forward movement of the molybdenum plate 1 along the length direction can be converted to forward movement along the width direction, realizing the conversion of the forward direction of the molybdenum plate 1 without manual movement, facilitating turning, improving turning efficiency, and also facilitating hot rolling of the second rolling assembly 3; by setting a length-direction centering mechanism 8 above the second transfer area 6 to make the long side of the molybdenum plate 1 face the input end of the second rolling assembly, it is easy to adjust the left and right position of the molybdenum plate 1, so that the long side of the molybdenum plate 1 tends to face the input port of the second rolling assembly 3, improving the hot rolling effect of the second rolling assembly 3.

[0026] Furthermore, as a specific implementation method, refer to Figure 1 and Figure 2The pushing mechanism 7 includes a first connecting seat 71 and a first telescopic cylinder 72 located at the front end of the upper end of the transfer platform 4. The first telescopic cylinder 72 is arranged in a horizontal front-back direction. The cylinder body of the first telescopic cylinder 72 is connected to the first connecting seat 71. A first push plate 73 is provided at the piston rod end of the first telescopic cylinder 72. The first push plate 73 is arranged perpendicular to the transfer platform 4, and the length direction of the first push plate 73 is arranged in a horizontal left-right direction. Several first telescopic cylinders 72 are provided. Several first telescopic cylinders 72 are arranged at equal intervals along the length direction of the first push plate 73. Several first telescopic cylinders 72 work synchronously. A baffle 10 is provided on the side of the upper end of the transfer platform 4 located in the first waiting area 5 away from the first rolling assembly 2. The length direction of the baffle 10 is arranged in a horizontal front-back direction. After being hot-rolled by the first rolling assembly 2, the molybdenum plate 1 is moved to the first waiting area 5 by the forward inertia of the conveying rollers on the first rolling assembly 2. The baffle 10 can prevent the molybdenum plate 1 from sliding out of the transfer platform 4 from the first waiting area 5. When the molybdenum plate is in the first waiting area 5, the extension of the first telescopic cylinder 72 can drive the first push plate 73 to push the molybdenum plate 1 to the second waiting area 6. After the molybdenum plate 1 is centered in the second waiting area 6, the extension of the first telescopic cylinder 72 can drive the first push plate 73 to push the molybdenum plate 1 from the second waiting area 6 onto the conveying rollers of the second rolling assembly 3. Then the first telescopic cylinder 72 retracts to restore the first push plate 73 to its initial position.

[0027] Furthermore, as a specific implementation method, refer to Figure 1 , Figure 2 and Figure 3The length-direction centering mechanism 8 includes a top plate 81 positioned above the second waiting area 6. The top plate 81 is horizontally oriented along its length. A rectangular opening 82 extends vertically through the top plate 81. A first vertical plate 88 and a second vertical plate 89 are respectively positioned on the left and right sides of the lower end of the top plate 81. A driving assembly for moving the first vertical plate 88 and the second vertical plate 89 closer to each other and further apart is provided within the rectangular opening 82. The driving assembly includes a double-threaded screw 83, the axial direction of which is along the length direction of the rectangular opening 82. The left and right ends of the threaded screw 83 are connected to the inner wall of the rectangular opening 82 through bearings. The left and right ends of the double threaded screw 83 are respectively provided with a first thread 84 and a second thread 85. The first thread 84 and the second thread 85 have the same pitch but opposite directions. The first thread 84 is fitted with a first ball nut block 86 for connecting with the upper end of the first vertical plate 88. The second thread 85 is fitted with a second ball nut block 87 for connecting with the upper end of the second vertical plate 89. The left end of the top plate 81 is provided with a forward and reverse motor 810 for rotating the double threaded screw 83. The operation of the forward and reverse motor 810 can drive the double threaded screw 83 to rotate around the shaft, thereby causing the first ball nut block 86 and the second ball nut block 87 to move closer or further apart, which in turn causes the first vertical plate 88 and the second vertical plate 89 to move closer or further apart. When the first vertical plate 88 and the second vertical plate 89 move closer together, they can push the left or right end of the molybdenum plate 1, so that the molybdenum plate 1 is in the center position between the first vertical plate 88 and the second vertical plate 89. After that, the forward and reverse motor 810 is controlled to make the first vertical plate 88 and the second vertical plate 89 move further apart and return to the initial position.

[0028] Furthermore, as a specific implementation method, refer to Figure 2 The drive assembly also includes a guide rod 811, whose axial direction is along the length of the rectangular opening 82. The left and right ends of the guide rod 811 are connected to the inner wall of the rectangular opening 82, respectively. The upper ends of the first vertical plate 88 and the second vertical plate 89 are respectively provided with guide cylinders 812 adapted to the guide rod 811. This improves the stability of the first vertical plate 88 and the second vertical plate 89 during movement.

[0029] Furthermore, as one implementation method, refer to Figure 1 and Figure 4The output end of the first rolling assembly 2 is also provided with a pushing mechanism 9 for pushing the rolled molybdenum plate 1 to the first waiting area 5. The pushing mechanism 9 includes two second telescopic cylinders 91, both arranged along the length of the first rolling assembly 2. The cylinder bodies of the two second telescopic cylinders 91 are respectively located on both sides of the first rolling assembly 2 via pads 92. A movable plate 93 is connected between the piston rods of the two second telescopic cylinders 91. The length of the movable plate 93 is arranged horizontally in a front-back direction. A third telescopic cylinder 84 is vertically arranged downward on the movable plate 93. The cylinder body of the third telescopic cylinder 84 is connected to the movable plate 93. A pusher plate 95 is provided at the lower end of the third telescopic cylinder 84. The length of the pusher plate 95 is arranged horizontally in a front-back direction. The piston rods of the second telescopic cylinders 91 point towards the first waiting area 5, and the two second telescopic cylinders 91 work synchronously. Several third telescopic cylinders 84 are provided, and the several third telescopic cylinders 84 work synchronously. The several third telescopic cylinders 84 are arranged at equal intervals along the length of the movable plate 93. When the molybdenum plate 1 cannot move into the first waiting area 5 due to inertia, the extension of the third telescopic cylinder 84 can be controlled to move the lever 95 downward, and then the extension of the second telescopic cylinder 91 can be controlled to move the lever 95 to the right, thereby pushing the molybdenum plate 1 into the first waiting area 5. Afterwards, the lever 95 is restored to its initial position by the contraction of the second telescopic cylinder 91 and the third telescopic cylinder 84.

[0030] It should be noted that the molybdenum plate 1 used in this utility model is rolled at a temperature of 1250°C before entering the first rolling assembly 2. After hot rolling in the first rolling assembly 2, its deformation rate is 33%, and after hot rolling in the second rolling assembly 3, its deformation rate is 37.5%. During hot rolling, the cross rolling method can make the structure of the molybdenum plate into fibrous, slender grains that are fine and uniform, and densely distributed in the thickness of the plate, thus achieving the purpose of refining the grains of the molybdenum plate.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hot-rolled molybdenum plate grain refining device, comprising a first rolling assembly (2) rolling along the length direction of the molybdenum plate (1) and a second rolling assembly (3) rolling along the direction perpendicular to the length direction of the molybdenum plate (1), characterized in that: The application also discloses a molybdenum plate conveying device, which comprises a first rolling assembly (2), a second rolling assembly (3) and a transfer platform (4).

2. The hot-rolled molybdenum plate grain refining device according to claim 1, characterized by, The pushing mechanism (7) comprises a first connecting seat (71) and a first telescopic cylinder (72) arranged on the front end of the upper end surface of the transfer platform (4), the first telescopic cylinder (72) is arranged in a horizontal front-back direction, the cylinder body of the first telescopic cylinder (72) is connected with the first connecting seat (71), and the piston rod end of the first telescopic cylinder (72) is provided with a first push plate (73) which is arranged perpendicularly to the transfer platform (4) and has a length direction arranged in a horizontal left-right direction.

3. The hot-rolled molybdenum plate grain refining apparatus according to claim 2, characterized by, The first telescopic cylinder (72) is provided with a plurality of first telescopic cylinders (72) which are arranged at equal intervals along the length direction of the first push plate (73) and work synchronously.

4. The hot-rolled molybdenum plate grain refining apparatus according to claim 1, wherein The length direction centering mechanism (8) comprises a top plate (81) arranged above the second standby area (6), the length direction of the top plate (81) is arranged in a horizontal left-right direction, a rectangular opening (82) is arranged through the top plate (81) in a vertical direction along the length direction of the top plate (81), and the left and right sides of the lower end of the top plate (81) are respectively provided with a first vertical plate (88) and a second vertical plate (89).

5. The apparatus for grain refinement of hot-rolled molybdenum plate according to claim 4, wherein The driving assembly comprises a double-threaded screw rod (83), the axial direction of the double-threaded screw rod (83) is arranged along the length direction of the rectangular opening (82), the left and right ends of the double-threaded screw rod (83) are connected with the inner walls of the rectangular opening (82) through bearings respectively, the left and right ends of the double-threaded screw rod (83) are respectively provided with a first thread (84) and a second thread (85), the pitches of the first thread (84) and the second thread (85) are the same but the directions of the first thread (84) and the second thread (85) are opposite, the first thread (84) is fitted with a first ball nut block (86) used for being connected with the upper end of the first vertical plate (88), the second thread (85) is fitted with a second ball nut block (87) used for being connected with the upper end of the second vertical plate (89), and the left end of the top plate (81) is provided with a forward and reverse motor (810) used for rotating the double-threaded screw rod (83).

6. The hot-rolled molybdenum plate grain refining apparatus according to claim 5, wherein The driving assembly further comprises a guide rod (811), the axial direction of the guide rod (811) is arranged along the length direction of the rectangular opening (82), and the left and right ends of the guide rod (811) are connected with the inner walls of the rectangular opening (82) respectively, and the upper ends of the first vertical plate (88) and the second vertical plate (89) are respectively provided with guide cylinders (812) matched with the guide rod (811).

7. The apparatus for grain refinement of hot-rolled molybdenum plate according to claim 2, wherein The upper end surface of the transfer platform (4) is provided with a baffle (10) on the side away from the first rolling assembly (2) of the first waiting-to-roll area (5), and the length direction of the baffle (10) is arranged in the horizontal front-rear direction.

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