A hot rolling device and method for silver-copper composite strip

Abstract

The present invention relates to the technical field of hot rolling of silver-copper composite strips, and specifically relates to a hot rolling device and a hot rolling method for silver-copper composite strips. A vertical plate is fixed on one side of the base, and a number of guide rollers for guiding silver strips are arranged on one side of the vertical plate. A height adjustment mechanism for the guide rollers is arranged inside the vertical plate; by setting a copper slag removal mechanism, when copper slag adheres to the surface of the hot rolling roll, the copper slag protrudes on the surface of the hot rolling roll and contacts the arc-shaped end of the steel brush. Under the drive of the horizontal linear mechanism, the steel brush directly strips the copper slag from the hot rolling roll. By this means, it is possible to avoid the copper slag on the surface of the hot rolling roll from damaging the surface of the composite strip when pressing the copper strip and the silver strip, and avoid poor appearance and uneven thickness of the product, which affects the normal use of components, thereby improving the product quality; by setting a lifting mechanism, the square cylinder can lift the copper strip, playing a role in supporting the middle part of the copper strip, and can reduce the probability of scratching caused by the contact and friction between the copper strip and external devices.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot rolling of silver-copper composite strips, and particularly relates to a hot rolling device and a hot rolling method for silver-copper composite strips. Background Art

[0002] Silver-copper composite metal strips are composite materials composed of two layers of materials, silver and copper, which are firmly bonded along the entire contact surface. Silver-copper composite strips combine the excellent electrical properties and oxidation resistance of fine-grained silver and the good physical properties of copper. Components made of silver-copper composite metal strips as contact materials are widely used in various electrical appliances such as switch connectors and relays.

[0003] When silver strips and copper strips are combined, a hot rolling process is usually adopted. During the hot rolling process, there is adhesive wear on the rolling rolls. Adhesive wear mainly occurs when rolling metals with strong adhesiveness, such as titanium, aluminum, copper and their alloys, resulting in peck marks on the surface of the rolled piece or indentations on the surface of the rolled piece.

[0004] For example, a hot rolling device for producing copper-silver composite strips disclosed in Chinese Patent CN212018938U includes a fixing plate. A hot rolling frame is fixedly connected to the top of the fixing plate. A driving motor is provided on the back of the hot rolling frame. The output end of the driving motor penetrates the hot rolling frame and is fixedly connected to a rotating rod. The right side of the rotating rod is movably connected to the connection part of the hot rolling frame. A driving roller is fixedly connected to the surface of the rotating rod. Through the rotating rod, the driving roller, the driving motor, the bearing sleeve, the cross bar, the auxiliary roller, the movable rod, the driving bevel gear, the transmission rod, the driven bevel gear, the moving plate, the screw rod and the screw block, the device can achieve the function of being convenient to adjust and use. During the operation process, the user needs to perform hot rolling of composite strips with different thicknesses due to the influence of the production process. The adjustment of the roll gap of the hot rolling rolls is not convenient, which is not conducive to the production operation of the user.

[0005] The hot rolling rolls of this device are not provided with a roll slag removal device, and manual slag removal of the hot rolling rolls is required before use, which is not convenient enough; at the same time, when the copper strip is conveyed, due to the long length of the equipment, although winding rolls and unwinding rolls are provided at both ends, the copper strip in the middle will still sag under the action of gravity, and it is easy to contact with the parts on the equipment and cause friction scratches. The above two problems will both cause damage to the surface of the silver-copper strip. Summary of the Invention

[0006] The purpose of the present invention is to provide a hot rolling device and a hot rolling method for silver-copper composite strips to solve the problems in the above background art that indentations appear on the surface of the rolled piece due to copper slag adhesion, manual slag removal is required, which is not convenient enough, and at the same time, when the copper strip is long, it is easy to contact with external devices and cause surface scratches.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A hot rolling device for silver-copper composite strip, including a workbench, which includes a base. One side of the base is fixed with a vertical plate, and the other side of the base is fixed with a mounting plate; several guiding rollers for guiding the silver strip are arranged on one side of the vertical plate; a height adjustment mechanism for the guiding rollers is arranged inside the vertical plate;

[0009] The upper surface of the base is installed with an inverted L-shaped bracket. One side of the bracket is installed with a lifting mechanism for lifting the copper strip. The upper surface of the base is provided with a mounting position for installing the lifting mechanism. The lifting mechanism includes a square cylinder. A lifting mechanism for the square cylinder is installed inside the bracket. One side of the vertical plate is rotatably connected with a lifting roller; one side of the lifting roller is provided with a hot rolling roller. There are two hot rolling rollers. The silver-copper composite strip passes between the two hot rolling rollers. One side of the mounting plate is provided with a transmission mechanism for driving the hot rolling rollers. One side of the hot rolling roller is provided with a copper slag removal mechanism for the hot rolling roller;

[0010] The copper slag removal mechanism includes steel brushes. A horizontal displacement mechanism for the steel brushes is installed on one side of the vertical plate. There are two groups of steel brushes. The two groups of steel brushes are respectively located on one side of the two hot rolling rollers.

[0011] The technical effects obtained by adopting the above technical solutions are as follows: By setting the guiding rollers and their height adjustment mechanism, the silver strip can be covered on the surface of the copper strip from above the copper strip and enter the hot rolling rollers together to achieve hot pressing and compounding, ensuring the mutual adhesion between the silver strip and the copper strip. By setting the lifting mechanism to lift the easily sagging part in the middle of the copper strip, it is avoided that the silver strip and the copper strip after bonding are in contact with the base or external equipment as a whole, which can reduce the surface damage rate of the silver-copper composite strip; By setting the transmission mechanism, the two hot rolling rollers rotate in opposite directions under the action of one drive to roll the silver-copper strip. By setting the steel brushes, when the steel brushes contact the copper slag and are driven by the horizontal displacement mechanism, the copper slag is swept away from the hot rolling rollers, solving the problems in the background technology that the surface of the rolling parts appears indentations caused by the adhesion of copper slag, manual slag removal is required, which is not convenient, and when the copper strip is long, it is easy to contact the external device and cause surface scratches.

[0012] Preferably, the horizontal displacement mechanism includes a fixed plate. The fixed plate is fixed on one side of the vertical plate. One end of the fixed plate is fixed with a guiding rod, and the other end of the fixed plate is rotatably connected with a displacement screw. A driving motor for driving the displacement screw to rotate is installed on the other side of the vertical plate.

[0013] The technical effects obtained by adopting the above technical solutions are as follows: The driving motor drives the displacement screw to rotate, so as to drive the subsequent steel brushes arranged on the guiding rod and the displacement screw, ensuring that the steel brushes can clean the copper slag.

[0014] Preferably, the horizontal displacement mechanism further includes a rectangular strip-shaped moving plate. The guide rod passes through the moving plate and is slidably connected to the moving plate. The displacement screw passes through the moving plate and is threadedly connected to the moving plate. One ends of the two steel brushes are respectively fixed to both ends of the moving plate. The moving plate is longitudinally arranged. One end of the steel brush close to the hot rolling roll is arc-shaped. A number of rollers are installed in the inner cavity of the square cylinder. Both ends of the rollers are rotatably connected to the inner walls on both sides of the square cylinder.

[0015] The technical effects achieved by adopting the above technical solution are as follows: After the displacement screw rotates, the moving plate horizontally moves on the outer wall of the guide rod. By setting one side of the steel brush to be arc-shaped, it can be closer to the surface of the hot rolling roll. Only when there is copper slag on the surface of the hot rolling roll, the protruding copper slag will contact the arc surface of the steel brush, ensuring the smooth cleaning of the protruding copper slag by the steel brush.

[0016] Preferably, the lifting mechanism includes a number of rollers installed in the inner cavity of the square cylinder. Both ends of the rollers are rotatably connected to the inner walls on both sides of the square cylinder; a guide rod and a lifting screw. The guide rod passes through one end of the square cylinder and is slidably connected to the square cylinder. The lifting screw passes through the other end of the square cylinder and is threadedly connected to the square cylinder. One end of the lifting screw is rotatably connected to the base, and the other end of the lifting screw is rotatably connected to the horizontal plate of the bracket. A knob is fixed to the top of the lifting screw.

[0017] The technical effects achieved by adopting the above technical solution are as follows: By setting the rollers, when the cylinder belt moves in the square cylinder, the rollers roll, which can reduce the friction of the cylinder belt. When the knob is turned, the lifting screw rotates, so that the square cylinder threadedly connected to the lifting screw moves up and down under the limit of the guide rod to lift the easily sagging part in the middle of the copper belt, avoiding the integrated silver belt and copper belt contacting the base or external equipment after fitting, and reducing the surface damage rate of the silver-copper composite belt.

[0018] Preferably, the installation position includes a card slot, a threaded hole, and a concave-shaped base. The bottom end of the vertical plate of the bracket is clamped in the card slot. The bottom end of the guide rod is threadedly connected in the threaded hole. The bottom end of the lifting screw is clamped in the base. The base is rotatably connected in the base, and several groups of installation positions are provided.

[0019] The technical effects achieved by adopting the above technical solution are as follows: By setting the installation position, the entire lifting mechanism is convenient to be installed on the base. Several of these mechanisms can be installed simultaneously according to requirements, and the arrangement distance and height can be adjusted according to requirements, making it flexible to use.

[0020] Preferably, the guide roller includes a rotating rod and a limiting ring. The limiting ring is fixed on the outer wall of the rotating rod. Two limiting rings are provided on the outer wall of each rotating rod. The two limiting rings are used to pass through the silver belt. One end of the rotating rod is rotatably connected to a rotating seat.

[0021] Preferably, the height adjustment mechanism includes a slider. A chute for the up-and-down movement of the slider is provided on one side of the vertical plate. The rotating seat is installed in the slider. A rotating motor for driving the rotation of the rotating seat is installed on one side of the slider. The top of the slider is rotatably connected to a lead screw, and the top end of the lead screw penetrates the vertical plate and is threadedly connected to the vertical plate.

[0022] The technical effects achieved by adopting the above technical solution are as follows: When the lead screw is turned, the slider moves up and down in the chute, thereby realizing the up-and-down movement of the guide roller. When the rotating motor is started, the guide roller rotates. By providing a plurality of guide rollers, the height adjustment of each guide roller is set separately, which is convenient for the silver strip to change its direction under the action of the guide roller and fit with the copper strip.

[0023] Preferably, a support roller is rotatably connected to one side of the vertical plate, and the support roller is located between the lifting roller and the hot rolling roller.

[0024] Preferably, the transmission mechanism includes a driving gear and a driven gear. The driving gear and the driven gear are respectively fixed at one end of the two hot rolling rollers. The driving gear is engaged with the driven gear. A hot rolling motor for driving the hot rolling roller is installed at one end of one of the hot rolling rollers, and the hot rolling motor is fixed to one side of the vertical plate by screws.

[0025] Based on the above-described silver-copper composite strip hot rolling device, the present invention also provides a hot rolling method for silver-copper composite strips, including the following steps:

[0026] S1. Put a 1.2-mm-thick silver solder strip into a multi-slitting machine with a winding function, cut it into a plurality of narrow strips with a width of 20 mm, and convey the 50-mm-wide and 2-mm-thick copper strip and the silver strip cut into narrow strips to a heating furnace with atmosphere protection for heat preservation heating respectively under the action of an uncoiler. Heat and keep warm at 600 °C under argon protection for 20 minutes. After the copper strip conveyed from the heat preservation furnace passes through the lifting mechanism for transportation and protection, it is conveyed into the composite rolling mill for hot rolling;

[0027] S2. Before the strip is threaded into the hot rolling mill, remove the slag on the surface of the hot rolling roller through the copper slag removal mechanism. After the slag removal is completed, the silver strip is closely attached to the upper surface of the copper strip under the limitation of the conveying device and enters the rolling mill together with the copper strip. Adjust the speed of the hot rolling mill to 380 m / min, the rolling force to 3000 KN, and the heating temperature to 650 °C. During the rolling process, continuously track the thickness of the strip through a non-contact thickness gauge, and adjust the speed of the hot rolling mill at a speed of 300-480 m / min to uniformly and precisely roll the composite strip to a thickness of 0.1 mm;

[0028] S3. The rolled composite strip enters the annealing furnace and is annealed at 600 °C for 3 minutes, and the precision-rolled silver-copper composite strip is re-wound through a winder.

[0029] A hot rolling device and a hot rolling method for a silver-copper composite strip proposed by the present invention have the following advantages compared with the prior art:

[0030] 1. By setting up a copper slag removal mechanism in the present invention, when copper slag adheres to the surface of the hot rolling roll, the copper slag protrudes on the surface of the hot rolling roll and contacts the arc-shaped end of the steel brush. Under the drive of the horizontal linear mechanism, the steel brush directly peels off the copper slag from the hot rolling roll. By this means, it can be avoided that the copper slag on the surface of the hot rolling roll damages the surface of the composite strip when pressing the copper strip and the silver strip, and avoid poor product appearance and uneven thickness, which affect the normal use of components, thereby improving the product quality.

[0031] 2. By setting up a lifting mechanism in the present invention, the square cylinder can lift the copper strip, playing a role in supporting the middle part of the copper strip. And the structural setting of this lifting mechanism makes it convenient to install with the base. The height of the square cylinder can be adjusted by the lifting mechanism, so that the lifting position and height of the copper strip can be adjusted according to needs. Through the setting of this mechanism, the probability of scratching caused by the contact and friction between the copper strip and external devices can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a method block diagram of the present invention;

[0033] Figure 2 is an axonometric view of the present invention;

[0034] Figure 3 is a structural schematic diagram of the lifting mechanism of the present invention;

[0035] Figure 4 is a structural schematic diagram of the copper slag removal mechanism of the present invention;

[0036] Figure 5 is a top view of the present invention;

[0037] Figure 6 is a side view of the present invention.

[0038] In the figure: 1. Base; 2. Vertical plate; 3. Installation plate; 4. Guide roller; 5. Height adjustment mechanism; 6. Bracket; 7. Lifting mechanism; 8. Installation position; 9. Lifting roller; 10. Hot rolling roll; 11. Transmission mechanism; 12. Copper slag removal mechanism; 1201. Steel brush; 701. Square cylinder; 1202. Fixed plate; 1203. Guide rod; 1204. Displacement screw; 1205. Driving motor; 1206. Moving plate; 702. Roller;

[0039] 703, lifting screw; 704, knob; 705, guide rod; 801, card slot; 802, threaded hole; 803, base; 401, rotating rod; 402, limit ring; 403, rotating seat; 501, slider; 502, chute; 503, rotating motor; 504, lead screw; 505, support roller; 1101, driving gear; 1102, driven gear; 1103, hot rolling motor. Detailed implementation manner

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] The present invention provides a Figure 1-6 shown hot rolling device for silver-copper composite strip, including a workbench, including a base 1, a vertical plate 2 is fixed on one side of the base 1, a mounting plate 3 is fixed on the other side of the base 1, several guide rollers 4 for guiding silver strips are arranged on one side of the vertical plate 2, a height adjustment mechanism 5 of the guide roller 4 is arranged inside the vertical plate 2, an inverted L-shaped bracket 6 is installed on the upper surface of the base 1, a lifting mechanism 7 for lifting the copper strip is installed on one side of the bracket 6, an installation position 8 for installing the lifting mechanism 7 is arranged on the upper surface of the base 1, a lifting roller 9 is rotatably connected to one side of the vertical plate 2, a hot rolling roller 10 is arranged on one side of the lifting roller 9, there are two hot rolling rollers 10, a transmission mechanism 11 for driving the hot rolling roller 10 is arranged on one side of the mounting plate 3, and a copper slag removal mechanism 12 of the hot rolling roller 10 is arranged on one side of the hot rolling roller 10.

[0042] By providing the silver strip guide roller 4 and its height adjustment mechanism 5, the silver strip can be covered on the surface of the copper strip from above the copper strip and enter the hot rolling roller together to realize hot pressing and compounding. By providing the lifting mechanism 7 to lift the easily sagging part in the middle of the copper strip, it is avoided that the copper strip contacts the base 1 or external equipment, increasing friction; by providing the lifting roller 9 to lift the copper strip, it is convenient for the silver strip to be close to the copper strip. By providing the transmission mechanism 11, the two hot rolling rollers 10 rotate in opposite directions under the action of one drive to roll the silver-copper strip. The lifting roller 9 is used to lift both the copper strip and the silver strip so that the two enter the hot rolling roller 10 in a close state.

[0043] The copper slag removal mechanism 12 includes a steel brush 1201, a horizontal displacement mechanism of the steel brush 1201 is installed on one side of the vertical plate 2, there are two groups of steel brushes 1201, and the two groups of steel brushes 1201 are respectively located on one side of the two hot rolling rollers 10. The lifting mechanism 7 includes a square cylinder 701, and a lifting mechanism of the square cylinder 701 is installed inside the bracket 6.

[0044] By arranging the steel brush 1201, when the steel brush 1201 contacts the copper slag and driven by the horizontal displacement mechanism, the copper slag is swept away from the hot rolling roll 10.

[0045] The horizontal displacement mechanism includes a fixing plate 1202, the fixing plate 1202 is fixed to one side of the vertical plate 2 by screws, one end of the fixing plate 1202 is fixed with a guide rod 1203, the other end of the fixing plate 1202 is rotatably connected with a displacement screw rod 1204, and a driving motor 1205 for driving the displacement screw rod 1204 to rotate is installed on the other side of the vertical plate 2. Starting the driving motor 1205 causes the displacement screw rod 1204 to rotate.

[0046] The horizontal displacement mechanism further includes a rectangular strip-shaped moving plate 1206. The guide rod 1203 penetrates through the moving plate 1206 and is slidably connected with the moving plate 1206. The displacement screw rod 1204 penetrates through the moving plate 1206 and is threadedly connected with the moving plate 1206. One ends of the two groups of steel brushes 1201 are respectively fixed to both ends of the moving plate 1206. The moving plate 1206 is arranged longitudinally, and one end of the steel brush 1201 close to the hot rolling roll 10 is arranged in an arc shape.

[0047] After the displacement screw rod 1204 rotates, the moving plate 1206 horizontally moves on the outer wall of the guide rod 1203. By setting one side of the steel brush 1201 to be arc-shaped, it can be closer to the surface of the hot rolling roll 10. Only when there is copper slag on the surface of the hot rolling roll 10, the protruding copper slag will contact the arc-shaped surface of the steel brush 1201.

[0048] A number of rollers 702 are installed in the inner cavity of the square cylinder 701. Both ends of the rollers 702 are rotatably connected with the inner walls on both sides of the square cylinder 701. By arranging the rollers 702, as Figure 3 shown, when the copper strip moves in the square cylinder 701, the rollers 702 roll.

[0049] The lifting mechanism includes a guide rod 705 and a lifting screw rod 703. The guide rod 705 penetrates through one end of the square cylinder 701 and is slidably connected with the square cylinder 701. The lifting screw rod 703 penetrates through the other end of the square cylinder 701 and is threadedly connected with the square cylinder 701. One end of the lifting screw rod 703 is rotatably connected with the base 1, the other end of the lifting screw rod 703 is rotatably connected with the horizontal plate of the bracket 6, and a knob 704 is fixed to the top of the lifting screw rod 703.

[0050] When the knob 704 is turned, the lifting screw rod 703 rotates, causing the square cylinder 701 threadedly connected with the lifting screw rod 703 to move up and down under the limitation of the guide rod 705.

[0051] The installation position 8 includes a card slot 801, a threaded hole 802, and a concave base 803. The bottom end of the vertical plate of the bracket 6 is clamped in the card slot 801, the bottom end of the guide rod 705 is threadedly connected in the threaded hole 802, and the bottom end of the lifting screw rod 703 is clamped in the base 803. The base 803 is rotatably connected in the base 1, and several groups of installation positions 8 are provided.

[0052] By providing the installation position 8, the entire lifting mechanism 7 is convenient to be installed on the base 1. Several of such mechanisms can be installed simultaneously according to requirements, and the arrangement distance and height can both be adjusted according to requirements, making it flexible to use.

[0053] The guide roller 4 includes a rotating rod 401 and a limiting ring 402. The limiting ring 402 is fixed on the outer wall of the rotating rod 401. Two limiting rings 402 are provided on the outer wall of each rotating rod 401. One end of the rotating rod 401 is rotatably connected to a rotating seat 403. During the transmission of the silver strip, the silver strip is located between the two limiting rings 402.

[0054] The height adjustment mechanism 5 includes a slider 501. A chute 502 for the up and down movement of the slider 501 is provided on one side of the vertical plate 2. The rotating seat 403 is installed in the slider 501. A rotating motor 503 for driving the rotation of the rotating seat 403 is installed on one side of the slider 501. The top of the slider 501 is rotatably connected to a lead screw 504. The top end of the lead screw 504 penetrates through the vertical plate 2 and is threadedly connected to the vertical plate 2.

[0055] When the lead screw 504 is turned, the slider 501 moves up and down in the chute 502, thereby realizing the up and down movement of the guide roller 4. When the rotating motor 503 is started, the guide roller 4 rotates. By providing several guide rollers 4, the height adjustment of each guide roller 4 is set separately, which is convenient for the silver strip to change direction and fit with the copper strip under the action of the guide roller 4.

[0056] One side of the vertical plate 2 is rotatably connected to a support roller 505. The support roller 505 is located between the lifting roller 9 and the hot rolling roller 10. By providing the support roller 505, the copper strip is supported.

[0057] The transmission mechanism 11 includes a driving gear 1101 and a driven gear 1102. The driving gear 1101 and the driven gear 1102 are respectively fixed at one end of the two hot rolling rollers 10. The driving gear 1101 meshes with the driven gear 1102. A hot rolling motor for driving the hot rolling roller 10 is installed at one end of one of the hot rolling rollers 10. The hot rolling motor is fixed to one side of the vertical plate 2 by screws;

[0058] When the hot rolling motor is started, the driving gear 1101 rotates, driving the driven gear 1102 to rotate, so that the two hot rolling rollers 10 rotate relatively.

[0059] Based on the above-described hot rolling device for silver-copper composite strip, the present invention also provides a method for using the hot rolling device for silver-copper composite strip, which includes the following steps:

[0060] S1. A hot rolling method for silver-copper composite strip. Put a 1.2-mm-thick silver solder strip into a multi-slitting machine with a winding function, cut it into multiple narrow strips with a width of 20 mm. Feed the 50-mm-wide and 2-mm-thick copper strip and the silver strip cut into narrow strips into a heating furnace with atmosphere protection through the uncoiler respectively for heat preservation heating. Heat and keep warm at 600 °C under argon protection for 20 minutes. After the copper strip conveyed from the heat preservation furnace passes through the lifting mechanism for transportation and protection, it is conveyed into the composite rolling mill for hot rolling.

[0061] S2. Before the strip is threaded into the hot rolling mill, remove the slag on the surface of the hot rolling rolls through the copper slag removal mechanism. After the slag removal is completed, the silver strip, under the limitation of the conveying device, adheres to the upper surface of the copper strip and enters the rolling mill together with the copper strip. Adjust the rotational speed of the hot rolling mill to 380 m / min, the rolling force to 3000 KN, and the heating temperature to 650 °C. During the rolling process, continuously track the thickness of the strip through a non-contact thickness gauge, and adjust the speed of the hot rolling mill at a rotational speed of 300 - 480 m / min to uniformly and precisely roll the composite strip to a thickness of 0.1 mm.

[0062] S3. The rolled composite strip enters the annealing furnace and is annealed at 600 °C for 3 minutes. The precision-rolled silver-copper composite strip is re-wound through the coiler.

[0063] When in use, remove the copper slag on the outer wall of the hot rolling roll: Start the drive motor to rotate the displacement screw. After the displacement screw rotates, the moving plate moves horizontally on the outer wall of the guide rod, and the arc-shaped end of the steel brush contacts the protruding copper slag on the surface of the hot rolling roll to peel off the copper slag from the hot rolling roll.

[0064] Before hot pressing, as Figure 2 shown, the silver strip is threaded between several guide rolls, the copper strip is threaded into the square cylinder, the lower surface of the copper strip contacts the rollers in the square cylinder, and under the action of the coiler and uncoiler at both ends outside the device, the copper strip (the metal strip located below the silver strip) moves in the square cylinder.

[0065] When adjusting the lifting height of the copper strip: Turn the knob, the lifting screw rotates, so that the square cylinder threadedly connected to the lifting screw moves up and down under the limitation of the guide rod until the required height is adjusted.

[0066] During hot pressing, at the support rolls (the support rolls are as Figure 2 and Figure 5 shown), the silver strip is limited by the limiting ring of the guide roll and is pressed against the surface of the copper strip under the pressing of the rotating rod, and at the lifting roll, the silver strip and the copper strip are pressed from below and enter the hot rolling roll for hot pressing.

[0067] By providing a copper slag removing mechanism to strip the copper slag from the hot rolling roll, this can avoid damage to the surface of the composite strip caused by the copper slag on the surface of the hot rolling roll when pressing the copper strip and the silver strip. By providing a lifting mechanism, the square cylinder can lift the copper strip to support the middle part of the copper strip.

[0068] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot rolling device for silver-copper composite strip, characterized in that: including a workbench, including a base (1), on one side of the base (1), a vertical plate (2) is fixed, and on the other side of the base (1), a mounting plate (3) is fixed; on one side of the vertical plate (2), a plurality of guide rollers (4) for guiding the silver strip are arranged; inside the vertical plate (2), a height adjusting mechanism (5) for the guide rollers (4) is arranged; on the upper surface of the base (1), an inverted L-shaped bracket (6) is mounted, on one side of the bracket (6), a lifting mechanism (7) for lifting the copper strip is mounted, on the upper surface of the base (1), a mounting position (8) for mounting the lifting mechanism (7) is arranged, the lifting mechanism (7) includes a square cylinder (701), inside the bracket (6), a lifting mechanism for the square cylinder (701) is mounted, and on one side of the vertical plate (2), a lifting roller (9) is rotatably connected; on one side of the lifting roller (9), a hot rolling roller (10) is arranged, there are two hot rolling rollers (10), the silver-copper composite strip passes between the two hot rolling rollers (10), on one side of the mounting plate (3), a transmission mechanism (11) for driving the hot rolling roller (10) is arranged, and on one side of the hot rolling roller (10), a copper slag removing mechanism (12) for the hot rolling roller (10) is arranged; the copper slag removing mechanism (12) includes a steel brush (1201), on one side of the vertical plate (2), a horizontal displacement mechanism for the steel brush (1201) is mounted, there are two groups of steel brushes (1201), and the two groups of steel brushes (1201) are respectively located on one side of the two hot rolling rollers (10); the lifting mechanism includes a plurality of rollers (702) arranged in the inner cavity of the square cylinder (701), both ends of the rollers (702) are rotatably connected to the inner side walls of the two sides of the square cylinder (701); a guide rod (705) and a lifting screw (703), the guide rod (705) penetrates through one end of the square cylinder (701) and is slidably connected to the square cylinder (701), the lifting screw (703) penetrates through the other end of the square cylinder (701) and is threadedly connected to the square cylinder (701), one end of the lifting screw (703) is rotatably connected to the base (1), the other end of the lifting screw (703) is rotatably connected to the horizontal plate of the bracket (6), and a knob (704) is fixed at the top of the lifting screw (703).

2. The hot rolling device for silver-copper composite strip according to claim 1, wherein: the horizontal displacement mechanism includes a fixing plate (1202), the fixing plate (1202) is fixed on one side of the vertical plate (2), one end of the fixing plate (1202) is fixed with a guide rod (1203), the other end of the fixing plate (1202) is rotatably connected to a displacement screw (1204), and on the other side of the vertical plate (2), a driving motor (1205) for driving the displacement screw (1204) to rotate is mounted.

3. A hot rolling device for silver-copper composite strip according to claim 2, characterized in that: The horizontal displacement mechanism further includes a rectangular strip-shaped moving plate (1206). The guide rod (1203) passes through the moving plate (1206) and is slidably connected to the moving plate (1206). The displacement screw (1204) passes through the moving plate (1206) and is threadedly connected to the moving plate (1206). One ends of two groups of the steel brushes (1201) are respectively fixed at two ends of the moving plate (1206). The moving plate (1206) is longitudinally arranged.

4. The hot rolling device for silver-copper composite strip according to claim 3, characterized in that: The installation position (8) includes a clamping groove (801), a threaded hole (802) and a concave-shaped base (803). The bottom end of the vertical plate of the bracket (6) is clamped in the clamping groove (801). The bottom end of the guide rod (705) is threadedly connected in the threaded hole (802). The bottom end of the lifting screw (703) is clamped in the base (803). The base (803) is rotatably connected in the base (1). Several groups of the installation positions (8) are provided.

5. A hot rolling device for silver-copper composite strip according to claim 4, characterized in that: The guide roller (4) includes a rotating rod (401) and a limiting ring (402). The limiting ring (402) is fixed on the outer wall of the rotating rod (401). Two limiting rings (402) are arranged on the outer wall of each rotating rod (401). The two limiting rings (402) are used for passing through the silver strip. One end of the rotating rod (401) is rotatably connected to a rotating seat (403).

6. The hot rolling device for silver-copper composite strip according to claim 5, characterized in that: The height adjusting mechanism (5) includes a slider (501). A chute (502) for the up-and-down movement of the slider (501) is formed on one side of the vertical plate (2). The rotating seat (403) is installed in the slider (501). A rotating motor (503) for driving the rotation of the rotating seat (403) is installed on one side of the slider (501). The top of the slider (501) is rotatably connected to a lead screw (504). The top end of the lead screw (504) passes through the vertical plate (2) and is threadedly connected to the vertical plate (2).

7. A hot rolling device for silver-copper composite strip according to claim 6, characterized in that: A support roller (505) is rotatably connected to one side of the vertical plate (2). The support roller (505) is located between the lifting roller (9) and the guide roller (4).

8. A hot rolling device for silver-copper composite strip according to claim 7, characterized in that: The transmission mechanism (11) includes a driving gear (1101) and a driven gear (1102). The driving gear (1101) and the driven gear (1102) are respectively fixed at one ends of two hot rolling rolls (10). The driving gear (1101) is meshed with the driven gear (1102). A hot rolling motor (1103) for driving the hot rolling roll (10) is installed at one end of one of the hot rolling rolls (10). The hot rolling motor (1103) is fixed on one side of the vertical plate (2) by screws.

9. A hot rolling method for a hot rolling device of a silver-copper composite strip according to any one of claims 1-8, characterized in that: It includes the following steps: S1. Put a 1.2-mm-thick silver welding strip into a multi-slitting machine with a rewinding function, cut it into multiple narrow strips with a width of 20 mm. The 50-mm-wide and 2-mm-thick copper strip and the silver strip cut into narrow strips are respectively conveyed into a heating furnace with atmosphere protection by the uncoiler for heat preservation heating. Heat and keep warm at 600 °C under argon protection for 20 minutes. After the copper strip conveyed from the heat preservation furnace passes through the lifting mechanism for transportation and protection, it is conveyed into the compound rolling mill for hot rolling; Before the strip is threaded through the hot rolling mill, the surface of the hot rolling rolls is deslagged by the copper slag removal mechanism. After the deslagging is completed, the silver strip, under the limitation of the conveying device, is closely attached to the upper surface of the copper strip and enters the rolling mill together with the copper strip. The rotational speed of the hot rolling mill is adjusted to 380 m / min, the rolling force is 3000 KN, and the heating temperature is 650 °C. During the rolling process, the thickness of the strip is continuously tracked by a non-contact thickness gauge, and the speed of the hot rolling mill is adjusted at a rotational speed of 300 - 480 m / min to uniformly finish rolling the composite strip to a thickness of 0.1 mm; S3. The rolled composite strip enters the annealing furnace and is annealed at 600 °C for 3 minutes, and the finely rolled silver-copper composite strip is re-wound through the rewinder.

Images