A leveling device after molybdenum sheet rolling

Abstract

This utility model relates to a leveling device for molybdenum sheets after rolling. This utility model effectively solves the problems of uneven leveling, difficulty in effectively eliminating longitudinal and transverse deformation of molybdenum sheets, and difficulty in eliminating residual stress within the molybdenum sheets caused by existing leveling devices. This molybdenum sheet leveling device allows the upper and lower sets of movable pressure rollers to simultaneously form a V-shaped arrangement, applying a combined radial extrusion force and axial tensile force to the molybdenum sheet. This effectively eliminates longitudinal and transverse deformation residual stress of the molybdenum sheet simultaneously, thus solving the problem of incomplete stress elimination caused by traditional uniaxial leveling. The bottom roller mechanism and the top pressure roller mechanism can also level the molybdenum sheet and form a continuous roller pressing channel, achieving uniform conveying of the molybdenum sheet and significantly improving leveling efficiency. The electromagnetic heating unit can heat the molybdenum sheet, reducing its yield strength, making it easier to eliminate deep residual stress, improving deformation recovery rate, and thus improving the processing quality of the molybdenum sheet.

Description

Technical Field

[0001] This utility model belongs to the technical field of molybdenum sheet processing equipment, specifically relating to a leveling device after molybdenum sheet rolling. Background Technology

[0002] Molybdenum sheets are used in the production of reflective screens and other materials in sapphire crystal growth furnaces. Due to their excellent properties such as high melting point, high strength, and low coefficient of thermal expansion, molybdenum sheets are widely used in semiconductor, photovoltaic, and aerospace fields. However, after rolling, they are prone to uneven internal stress distribution, warping, and deformation; they also have poor plasticity at room temperature, and traditional force straightening can easily lead to edge cracks or surface microcracks.

[0003] Traditional leveling methods mostly involve single-roller flattening or manual hammering, which have problems such as low efficiency, uneven leveling, and easy to cause micro-cracks. Moreover, existing straightening machines are mostly designed for metals with good ductility such as steel and aluminum, and have poor adaptability to molybdenum sheets. They are not easy to effectively eliminate longitudinal and transverse deformation of molybdenum sheets and are difficult to eliminate residual stress in molybdenum sheets, thus affecting the production quality of molybdenum sheets. Utility Model Content

[0004] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides a molybdenum sheet leveling device after rolling. This device can simultaneously apply a combined radial extrusion force and axial tensile force to the molybdenum sheet, effectively eliminating longitudinal and transverse residual stresses, thus solving the problem of incomplete stress elimination caused by traditional uniaxial flattening. Furthermore, it can form a continuous roller pressing channel, achieving uniform conveying of the molybdenum sheet and significantly improving leveling efficiency. The electromagnetic heating unit can heat the molybdenum sheet, reducing its yield strength, making it easier to eliminate deep residual stresses, and improving the deformation recovery rate, thereby improving the processing quality of the molybdenum sheet.

[0005] A leveling device for molybdenum sheet after rolling includes a base, a top plate, and a lifting plate. The upper surface of the base is provided with a bottom roller mechanism, which includes a driving roller, two driven rollers, and a first geared motor that drives all three to rotate synchronously. The middle of the upper surface of the base is provided with a movable pressure roller mechanism, which includes a second geared motor, a driving gear, two flattening rollers, a rotating frame, and driven gears. The flattening rollers are rotatably connected to the inside of the rotating frame, and the bottom end of the rotating frame shaft is fixedly connected to a driven gear. The second geared motor drives the driven gears on both sides to rotate in opposite directions through the driving gear. One side of the upper surface of the base is provided with an electromagnetic heating unit that can heat the molybdenum sheet. The top plate is fixed to the top of the base, and its four corners are provided with electric cylinders that drive the lifting plate to rise and fall. The lower surface of the lifting plate is provided with a movable pressure roller mechanism symmetrical to the base, and the lower surface of the lifting plate is provided with a top pressure roller mechanism.

[0006] Preferably, the bottom roller mechanism further includes pulleys and belts. Both the driving roller and the driven roller are fixedly connected to pulleys at their ends. The pulley at the end of the driving roller is connected to the pulleys of the two driven rollers respectively through two belts. The output end of the first reduction motor is connected to the pulley at the end of the driving roller through a spline.

[0007] Preferably, the two flattening rollers are respectively located between the driving roller shaft and the two driven roller shafts. The flattening rollers are horizontally rotatably connected inside the rotating frame and their top ends are on the same horizontal plane as the top ends of the driving roller shaft. The rotating frame is rotatably connected to the upper surface of the base and the driven gear is fixedly connected to the bottom end of the rotating frame shaft and set on the lower surface of the base. The driving gear is connected to the output end of the second reduction motor through a spline and is connected to the driven gear for transmission.

[0008] Preferably, the upper surface of the base is provided with an arc-shaped groove, and both sides of the lower surface of the rotating frame of the movable pressure roller mechanism are fixedly connected with support rods that are slidably connected in the arc-shaped groove.

[0009] Preferably, the top pressure roller mechanism includes three sets of fixed frames and top pressure rollers. The three top pressure rollers are horizontally rotatably connected inside the three fixed frames and are arranged parallel to each other. The three fixed frames are fixedly connected to the lower surface of the lifting plate. The three top pressure rollers are vertically corresponding to the active roller shaft and the two driven roller shafts, respectively. The bottom ends of the three top pressure rollers are on the same horizontal plane as the bottom ends of the two flattening rollers on the lifting plate.

[0010] Preferably, both the base and the movable pressure roller mechanism of the lifting plate are provided with protective covers.

[0011] Preferably, the base and the movable pressure roller mechanism on the lifting plate operate synchronously, and the upper and lower corresponding pressure rollers rotate in the same direction and angle.

[0012] The beneficial effects of the above technical solution are as follows:

[0013] This molybdenum sheet rolling leveling device, through the arrangement of a bottom roller mechanism, a movable pressure roller mechanism, and a top pressure roller mechanism, allows the upper and lower sets of movable pressure roller mechanisms to simultaneously form a V-shaped arrangement, applying a combined effect of radial extrusion force and axial tensile force to the molybdenum sheet. This effectively eliminates the longitudinal and transverse residual stress of the molybdenum sheet simultaneously, thus solving the problem of incomplete stress elimination caused by traditional uniaxial leveling. The electric cylinder-driven lifting plate can adjust the pressing height in real time to adapt to the leveling requirements of molybdenum sheets of different thicknesses. The bottom roller mechanism and the top pressure roller mechanism can also level the molybdenum sheet and form a continuous roller pressing channel, achieving uniform conveying of the molybdenum sheet and significantly improving leveling efficiency. The electromagnetic heating unit can heat the molybdenum sheet, reducing its yield strength, making it easier to eliminate deep residual stress, and improving the deformation recovery rate, thereby improving the processing quality of the molybdenum sheet. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the disassembled state of the base and top plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the bottom roller mechanism and the movable pressure roller mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the disassembled state of the movable pressure roller mechanism of this utility model;

[0018] Figure 5 This is a schematic diagram showing the disassembled state of the lifting plate and the top plate of this utility model.

[0019] In the diagram: 1. Base; 2. Top plate; 3. Lifting plate; 4. Bottom roller mechanism; 401. Driving roller; 402. Driven roller; 403. Pulley; 404. Belt; 405. First geared motor; 5. Movable pressure roller mechanism; 501. Flattening roller; 502. Rotating frame; 503. Driven gear; 504. Driving gear; 505. Second geared motor; 6. Electromagnetic heating unit; 7. Electric cylinder; 8. Top pressure roller mechanism; 801. Fixed frame; 802. Top pressure roller; 9. Protective cover; 10. Arc groove; 11. Support rod. Detailed Implementation

[0020] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 5 The embodiments are described in detail below.

[0021] This embodiment provides a leveling device for molybdenum sheets after rolling, as shown in the attached figure. Figure 1-5As shown, the system includes a base 1, a top plate 2, and a lifting plate 3. The upper surface of the base 1 is equipped with a bottom roller mechanism 4 that supports and moves a molybdenum sheet. The bottom roller mechanism 4 includes a driving roller 401, a driven roller 402, a pulley 403, a belt 404, and a first reduction motor 405. The driving roller 401 is horizontally rotatably connected to the middle of the base 1 via bearings. There are two driven rollers 402, each horizontally rotatably connected to both sides of the upper surface of the base 1 via bearings. Both driven rollers 402 are parallel to the driving roller 402, and their top ends are on the same horizontal plane. A pulley 403 is fixedly connected to the same end of both the driving roller 401 and the two driven rollers 402. The belt 404 at the end of the driving roller 401... Two belts 404 are connected to the pulley 403, and the two belts 404 are respectively connected to the pulleys 403 at the ends of the two driven roller shafts 403. The pulley 403 at the end of the driving roller shaft 401 is connected to the first reduction motor 405 through a spline. A mounting bracket for mounting the first reduction motor 405 is fixedly connected to the middle of the side of the base 1, and the mounting bracket is sleeved on the outside of the pulley 403 at the end of the driving roller shaft 401. The first reduction motor 405 is fixedly mounted on the side of the mounting bracket. The first reduction motor 405 drives the pulley 403 and the driving roller shaft 401 connected to it to rotate clockwise. It can drive the driven roller shafts 403 on both sides to rotate clockwise synchronously through the belts 404, thereby playing the role of conveying molybdenum sheets and facilitating the uniform backward movement of the molybdenum sheets.

[0022] A movable pressure roller mechanism 5, capable of horizontal rotation and eliminating the deformation stress of the molybdenum sheet, is provided in the middle of the upper surface of the base 1. The movable pressure roller mechanism 5 includes a flattening roller 501, a rotating frame 502, a driven gear 503, a driving gear 504, and a second reduction motor 505. The flattening roller 501 is horizontally rotatably connected inside the rotating frame 502, and its top end is at the same level as the top end of the driving roller shaft 401. The rotating frame 502 is rotatably connected to the upper surface of the base 1, and the driven gear 503 is fixedly connected to the bottom end of the rotating shaft of the rotating frame 502 and is located on the lower surface of the base 1. The driving gear 504 is... The output end of the second geared motor 505 is connected via a spline and is driven by the driven gear 503. There are two flattening rollers 501, two rotating frames 502 and two driven gears 503. The two flattening rollers 501 are respectively set between the driving roller shaft 401 and the two driven roller shafts 402. The two driven gears 503 are respectively driven by the two sides of the driving gear 504. A protective cover 9 is fixedly connected to the lower surface of the base 1 and covers the outside of the driving gear 504 and the two driven gears 503. The second geared motor 505 is fixedly installed in the middle of the lower surface of the protective cover 9.

[0023] Arc-shaped grooves 10 are formed on the upper surface of the base 1 and at the vertically corresponding ends of the rotating frame 502. Support rods 11 are fixedly connected to both sides of the lower surface of the rotating frame 502, and the support rods 11 are slidably connected within the corresponding arc-shaped grooves 10. The second reduction motor 505 drives the drive gear 504 to rotate, which in turn drives the driven gears 503 on both sides and the rotating frame 502 to rotate synchronously in opposite directions, thereby causing the flattening rollers 501 on both sides to form a V-shaped arrangement. The support rods 11 on the lower surface of the rotating frame 502 move within the arc-shaped grooves 10, which can limit the movement of the rotating frame 502. Simultaneously, when the rotating frame 502 stops moving, they can provide support for the rotating frame 502. The design ensures that the flattening roller 501 remains stable and firm when flattening the molybdenum sheet. Furthermore, the adjustable rotation angle of the V-shaped arrangement allows for different flattening effects on the molybdenum sheet. When the angle between the two flattening rollers 501 within the V-shaped arrangement and the drive roller shaft 401 is less than or equal to 30°, it effectively eliminates longitudinal wave deformation of the molybdenum sheet, stretches the molybdenum fiber, and significantly improves the straightness in the length direction. When the angle between the two flattening rollers 501 within the V-shaped arrangement and the drive roller shaft 401 is approximately 45°, it simultaneously optimizes the lateral and longitudinal flatness, eliminating both longitudinal wave deformation and lateral bulges and depressions, thereby improving the flattening effect.

[0024] An electromagnetic heating unit 6 that can heat the molybdenum sheet is fixedly installed on one side of the upper surface of the base 1. The electromagnetic heating unit 6 is a known technology and is the same as the heating mechanism inside the induction cooker. After being powered on, it can heat the molybdenum sheet passing above. Therefore, it will not be described in detail here.

[0025] The top plate 2 is fixedly installed on the top of the base 1, and electric cylinders 7 that can drive the lifting plate 3 to move up and down are fixedly installed at the four corners of its upper surface. The movable ends of the electric cylinders 7 are all inserted under the top plate 2 and fixedly connected to the lifting plate 3. The four electric cylinders 7 move synchronously, which can drive the lifting plate 3 and the structure below it to move up and down, making it easy to adjust its height, thereby facilitating the flattening of molybdenum sheets of different thicknesses.

[0026] The lower surface of the lifting plate 3 is provided with the same movable pressure roller mechanism 5 as the base 1. The two movable pressure roller mechanisms 5 are vertically aligned. The movable pressure roller mechanism 5 on the lifting plate 3 and the movable pressure roller mechanism 5 on the base 1 are symmetrically arranged with their horizontal center line as the axis of symmetry. The upper surface of the lifting plate 3 is also fixedly connected with a protective cover 9. The second reduction motor 505 inside the movable pressure roller mechanism 5 on the lifting plate 3 is fixedly installed in the middle of the upper surface of the protective cover 9. The surface of the top plate 2 is provided with a round hole, through which the second reduction motor 505 can pass, ensuring the normal lifting of the lifting plate 3.

[0027] The bottom movable pressure roller mechanism 5 moves synchronously with the top movable pressure roller mechanism 5. The rotation direction and angle of the two corresponding upper and lower pressure rollers 501 are also the same, and the upper and lower corresponding pressure rollers 501 always maintain the corresponding state. After the pressure rollers 501 on both sides are rotated to a V-shape, the upper and lower V-shaped pressure rollers 501 press the molybdenum sheet tightly, so that the molybdenum sheet is subjected to the combined action of radial extrusion force and axial tensile force of the V-shaped pressure rollers 501 in the transverse direction. This can simultaneously eliminate the longitudinal and transverse deformation of the molybdenum sheet. Moreover, the pressure direction of the V-shaped pressure rollers 501 on both sides is different when pressing the molybdenum sheet, which can more fully flatten the deformation of the molybdenum sheet, thereby effectively eliminating the residual stress in the molybdenum sheet.

[0028] A top pressure roller mechanism 8, corresponding to the bottom roller mechanism 4, is fixedly connected to the lower surface of the lifting plate 3. The top pressure roller mechanism 8 includes three sets of fixed frames 801 and top pressure rollers 802. The three top pressure rollers 802 are horizontally rotatably connected inside the three fixed frames 801 and are all arranged parallel to each other. The three fixed frames 801 are all fixedly connected to the lower surface of the lifting plate 3, and the three top pressure rollers 802 are vertically corresponding to the driving roller 401 and the two driven rollers 402, respectively. The bottom end of the top pressure roller 802 is at the same level as the bottom ends of the two flattening rollers 501 on the lifting plate 3. The electric cylinder 7 drives the lifting plate 3 to descend, so that the top pressure roller 802 and the flattening roller 501 above press against the molybdenum sheet. Together with the lower active roller shaft 401, driven roller shaft 402 and the lower flattening roller 501, they can apply pressure to the molybdenum sheet. The first reduction motor 405 drives the active roller shaft 401 and driven roller shaft 402 to rotate clockwise, which can fully flatten the molybdenum sheet as a whole.

[0029] The first geared motor 405, the second geared motor 505, the electromagnetic heating unit 6, and the electric cylinder 7 are all electrically connected to the external control unit and are all electrically connected to the external circuit through wires.

[0030] In summary, the operating steps of this molybdenum sheet leveling device after rolling are as follows:

[0031] 1. Start the electromagnetic heating unit 6, adjust the heating temperature to a temperature range that can reduce the yield strength of the molybdenum sheet, and then place the rolled molybdenum sheet above the bottom roller mechanism 4 from one side of the electromagnetic heating unit 6.

[0032] 2. Start the electric cylinder 7 to drive the lifting plate 3 to descend until the top pressure roller 802 of the top pressure roller mechanism 8 presses the surface of the molybdenum sheet and locks the height. The electromagnetic heating unit 6 below can then heat the molybdenum sheet above.

[0033] 3. Next, start the second reduction motor 505 on the base 1 and the lifting plate 3 to drive the active gear 504 to drive the driven gear 503 to rotate; the rotating frame 502 rotates synchronously in opposite directions under the gear transmission, so that the flattening rollers 501 on both sides form a V-shaped arrangement, and the support rod 11 slides along the arc groove 10 to the limit point and then stops.

[0034] 4. Then start the first reduction motor 405, which drives the active roller shaft 401 and the driven roller shaft 402 to rotate clockwise at a uniform speed through the belt 404, conveying the molybdenum sheet to move backward. The bottom flattening roller 501 and the top flattening roller 501 apply a combined radial compression and axial tension force to the molybdenum sheet. At the same time, the top pressure roller 802 works in conjunction with the active roller shaft 401 and the driven roller shaft below to roll and press, thereby effectively eliminating the local unevenness and residual stress of the molybdenum sheet.

[0035] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A molybdenum sheet flattening device after rolling, comprising a base (1), a top plate (2) and a lifting plate (3), characterized in that: The upper surface of the base (1) is provided with a bottom roller mechanism (4), which includes a driving roller (401), two driven rollers (402), and a first reduction motor (405) that drives the three to rotate synchronously; the middle part of the upper surface of the base (1) is provided with a movable pressure roller mechanism (5), which includes a second reduction motor (505), a driving gear (504), two flattening rollers (501), a rotating frame (502), and a driven gear (503); the flattening rollers (501) are rotatably connected inside the rotating frame (502), and the... The rotating frame (502) has a driven gear (503) fixedly connected to the bottom of the shaft. The second geared motor (505) drives the driven gears (503) on both sides to rotate in opposite directions through the driving gear (504). An electromagnetic heating unit (6) that can heat the molybdenum sheet is provided on one side of the upper surface of the base (1). The top plate (2) is fixed to the top of the base (1), and electric cylinders (7) that drive the lifting plate (3) to lift are provided at its four corners. The lower surface of the lifting plate (3) is provided with a movable pressure roller mechanism (5) that is symmetrical to the base (1), and the lower surface of the lifting plate (3) is provided with a top pressure roller mechanism (8).

2. The molybdenum sheet flattening device according to claim 1, characterized by: The bottom roller mechanism (4) further includes a pulley (403) and a belt (404). The ends of the active roller (401) and the driven roller (402) are fixedly connected to pulleys (403). The pulley (403) at the end of the active roller (401) is connected to the pulleys (403) of the two driven rollers (402) respectively through two belts (404). The output end of the first reduction motor (405) is connected to the pulley (403) at the end of the active roller (401) through a spline.

3. The molybdenum sheet leveling device according to claim 1, characterized in that: The two flattening rollers (501) are respectively located between the driving roller shaft (401) and the two driven roller shafts (402). The flattening roller (501) is horizontally rotatably connected inside the rotating frame (502) and its top end is on the same horizontal plane as the top end of the driving roller shaft (401). The rotating frame (502) is rotatably connected to the upper surface of the base (1) and the driven gear (503) is fixedly connected to the bottom end of the rotating frame (502) shaft and set on the lower surface of the base (1). The driving gear (504) is connected to the output end of the second reduction motor (505) through a spline and is connected to the driven gear (503) in a transmission connection.

4. The molybdenum sheet leveling device according to claim 1, characterized in that: The upper surface of the base (1) is provided with an arc groove (10), and the two sides of the lower surface of the rotating frame (502) of the movable pressure roller mechanism (5) are fixedly connected with support rods (11) that are slidably connected in the arc groove (10).

5. The molybdenum sheet leveling device according to claim 1, characterized in that: The top pressure roller mechanism (8) includes three sets of fixed frames (801) and top pressure rollers (802). The three top pressure rollers (802) are horizontally rotatably connected inside the three fixed frames (801) and are all arranged parallel to each other. The three fixed frames (801) are all fixedly connected to the lower surface of the lifting plate (3), and the three top pressure rollers (802) are vertically corresponding to the active roller shaft (401) and the two driven roller shafts (402) respectively. The bottom ends of the three top pressure rollers (802) are on the same horizontal plane as the bottom ends of the two flattening rollers (501) on the lifting plate (3).

6. The molybdenum sheet leveling device according to claim 1, characterized in that: The movable pressure roller mechanism (5) of the base (1) and the lifting plate (3) are both equipped with protective covers (9).

7. The molybdenum sheet leveling device according to claim 1, characterized in that: The base (1) and the movable pressure roller mechanism (5) on the lifting plate (3) move synchronously, and the upper and lower corresponding pressure rollers (501) rotate in the same direction and angle.

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