A bimetallic composite pipe rolling apparatus

Abstract

The application discloses a double-metal composite pipe rolling equipment and relates to the technical field of metal rolling forming. The equipment comprises a bearing table, a first rolling mill, a feeding device and a driving device. The first rolling mill comprises a first support and two first rollers oppositely arranged above and below. The first support is arranged on the bearing table, and the first rollers are rotationally arranged on the first support. A plurality of radially recessed first annular rolling grooves are formed on the outer circumferential surface of the first rollers along the axial direction of the first rollers. The plurality of first annular rolling grooves on the two first rollers are one-to-one corresponding. The two corresponding first annular rolling grooves are used for accommodating and rolling the double-metal composite pipe. The groove widths of the first annular rolling grooves that are not corresponding to each other are different. The feeding device is arranged on the bearing table and is used for driving the double-metal composite pipe to move in the rolling direction. A fixing frame is fixedly arranged on the bearing table. The fixing frame is provided with a first strip table. The upper and lower surfaces of the first strip table are both fixedly provided with first racks. A driving assembly is arranged on the bearing table and is used for driving the first support to move.

Description

Technical Field

[0001] This invention relates to the field of metal rolling forming technology, and more particularly to a bimetallic composite tube rolling equipment. Background Technology

[0002] Existing bimetallic composite tube rolling equipment, such as periodic rolling mills and continuous rolling mills, typically can only roll a single specification of bimetallic composite tube in a single pass. To produce bimetallic composite tubes of different specifications, frequent roll changes or even the entire production line replacement is required. This not only severely restricts production efficiency and increases equipment downtime but also leads to high production costs. Therefore, traditional equipment struggles to achieve high-efficiency, low-cost production for rolling multiple bimetallic composite tubes of different specifications. Summary of the Invention

[0003] The purpose of this invention is to provide a bimetallic composite tube rolling equipment to improve rolling efficiency and reduce production costs when multiple bimetallic composite tubes of different specifications need to be rolled.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A bimetallic composite tube rolling equipment, comprising:

[0006] Support platform;

[0007] The first rolling mill includes a first support and two first rolls arranged vertically opposite each other. The first support is movable on a support platform along the rolling direction, and the first rolls are rotatably mounted on the first support. The outer circumferential surface of the first rolls has multiple radially recessed first annular grooves along their own axial direction. The multiple first annular grooves located on the two first rolls correspond one-to-one. The space between two corresponding first annular grooves is used to accommodate and roll bimetallic composite tubes. The groove widths of the non-corresponding first annular grooves are different from each other. First gears are coaxially fixed at both ends of the axial direction of the two first rolls.

[0008] A feeding device is installed on the support platform and is used to drive the bimetallic composite tube to move along the rolling direction;

[0009] A fixed frame is fixed on a support platform. A first strip platform is provided on the fixed frame. A first rack is fixed on both the upper and lower surfaces of the first strip platform. The guiding direction of the first rack is the same as the rolling direction. The first strip platform is located in the gap between two first rolls. The first rack meshes with a first gear.

[0010] A drive assembly is disposed on the support platform and connected to the first bracket, and is used to drive the first bracket to move.

[0011] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the bottom surface of the first annular rolling groove is provided with a corrugated structure, which is composed of wave crests and wave troughs. The wave crests and wave troughs are alternately arranged along the axial direction of the first roll and extend along the circumference of the first roll.

[0012] The bimetallic composite tube rolling equipment also includes a second rolling mill, which is located downstream of the first rolling mill along the rolling direction. The second rolling mill includes a second support and two second rolls arranged vertically opposite each other. The second support is fixed to the support platform, and the second rolls are rotatably mounted on the second support. The outer circumferential surface of the second rolls has multiple radially recessed second annular grooves along their own axial direction. The bottom surface of the second annular grooves is a smooth curved surface. The multiple second annular grooves located on the two second rolls correspond one-to-one. The space between two corresponding second annular grooves is used to accommodate and roll the bimetallic composite tube. The groove widths of the non-corresponding second annular grooves are different from each other.

[0013] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, a first protrusion is provided on the first support, and the driving assembly includes:

[0014] The drive frame is fixedly mounted on the support platform and is located upstream of the first rolling mill along the rolling direction.

[0015] The first drive motor is fixedly mounted on the drive frame.

[0016] The crank gear has a second protrusion eccentrically provided on its end face;

[0017] The gear transmission assembly is used to drive the crank gear to rotate;

[0018] The drive link has its two ends hinged to the first protrusion and the second protrusion, respectively, and is used to drive the first bracket to reciprocate as the crank gear rotates.

[0019] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the gear transmission assembly includes:

[0020] The first driving gear is connected to the drive end of the first drive motor;

[0021] The first transmission rod is rotatably mounted on the drive frame. A first driven gear is coaxially fixed on the first transmission rod. The first driven gear meshes with the first driving gear to drive the first transmission rod to rotate. A second driving gear is coaxially fixed at both ends of the first transmission rod.

[0022] The second transmission rod is rotatably mounted on the drive frame, and the crank gear is coaxially fixed on the second transmission rod, meshing with the second drive gear.

[0023] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the feeding device includes:

[0024] The feeding frame is fixed on the support platform and is located upstream of the first rolling mill along the rolling direction;

[0025] Two feeding rollers are arranged opposite each other and are rotatably mounted on the feeding frame. The outer circumferential surface of the feeding rollers is provided with multiple radially recessed third annular grooves along their own axial direction. The multiple third annular grooves located on the two feeding rollers correspond one to one. The space between two corresponding third annular grooves is used to accommodate bimetallic composite tubes. The groove widths of the non-corresponding third annular grooves are different from each other.

[0026] The second drive motor is installed on the feeding frame and its drive end is connected to the feeding roller to drive the feeding roller to rotate.

[0027] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the feeding device further includes:

[0028] The support roller assembly is located on the side of the feeding frame away from the first rolling mill. The support roller assembly is set on the bearing platform. The roller surface of the support roller assembly has multiple radially recessed annular grooves along its own axial direction. The annular grooves are used to support the bimetallic composite tube.

[0029] A pusher plate, the bottom of which is moved along the rolling direction and mounted on the support platform, has multiple push rods fixed on it. One end of each push rod is used to abut against one end of the bimetallic composite tube and push the bimetallic composite tube.

[0030] The driving component has its driving end connected to the pusher plate, and is used to drive the pusher plate to move.

[0031] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the bimetallic composite tube rolling equipment further includes:

[0032] Mandrel support, along the rolling direction, is located upstream of the first rolling mill;

[0033] Multiple mandrels are moved along the rolling direction and set on a mandrel support. The mandrels are used to pass through the bimetallic composite tube. The mandrels have a hollow structure. The end of the mandrel near the first rolling mill is closed. The mandrels are used to support the bimetallic composite tube.

[0034] The cooling nozzle is coaxially arranged inside the mandrel, and an annular gap is formed between the outer wall of the cooling nozzle and the inner wall of the mandrel. The outlet of the cooling nozzle faces the closed end of the mandrel. The cooling nozzle is used to introduce coolant into the mandrel, and the annular gap is used for coolant flow.

[0035] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the outer wall of the cooling nozzle is also provided with guide fins, which are spirally arranged on the outer wall of the cooling nozzle.

[0036] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the bimetallic composite tube rolling equipment further includes an induction heating device, which includes:

[0037] A heating support is fixedly mounted on the support platform and located upstream of the first rolling mill along the rolling direction;

[0038] An electromagnetic heating coil is fixedly mounted on a heating bracket and is used to surround the outer circumference of the bimetallic composite tube to heat the bimetallic composite tube.

[0039] Optionally, in the above-mentioned bimetallic composite tube rolling equipment, the shaft sections between the two axial ends of the two first rolls are also coaxially fixed with second gears. The bimetallic composite tube rolling equipment also includes a support frame, which is fixedly mounted on the bearing platform. A second strip platform is provided on the support frame. A second rack is fixedly mounted on both the upper and lower surfaces of the second strip platform. The guiding direction of the second rack is parallel to the rolling direction. The second strip platform is located in the gap between the two first rolls. The second rack is used to mesh with the second gear.

[0040] Compared with the prior art, the bimetallic composite tube rolling equipment provided in this application includes a first rolling mill comprising a first support and two first rolls arranged vertically opposite each other. The first support is movably mounted on a support platform along the rolling direction. Multiple first annular grooves are formed on the first rolls along their own axial direction. The multiple first annular grooves on the two first rolls correspond one-to-one, and the groove widths of the first annular grooves at different corresponding positions are different, used to accommodate and roll bimetallic composite tubes of different specifications. First gears are coaxially fixed at both ends of the first rolls. A first strip platform is set on the fixed frame in the gap between the two first rolls, and a first rack is fixed on both the upper and lower surfaces of the first strip platform. The first rack meshes with the first gear, and the guiding direction of the first rack is the same as the rolling direction. A drive assembly is connected to the first support and is used to drive the first support to move. A feeding device is installed on the support platform and is used to drive the bimetallic composite tubes to move along the rolling direction. During operation: The feeding device feeds multiple bimetallic composite tubes of different specifications into the first rolling mill along the rolling direction. The drive assembly drives the first support to move along the rolling direction. At this time, the first roll set on the first support moves with the first support. Since the first gears at both ends of the first roll mesh with the first rack set on the fixed frame, the first gear rolls on the first rack, thereby driving the first roll coaxial with the first gear to rotate. The first roll rotates on the first rolling mill, and as the first rolling mill moves back and forth along the rolling direction, the first roll can perform rolling and rolling on the surface of the bimetallic composite tube while moving and rotating, so that multiple bimetallic composite tubes of different specifications are rolled in the first annular groove of the corresponding groove width. This configuration, by setting multiple first annular grooves with different widths on the first roll as rolling channels, allows for the direct adaptation and rolling of various specifications of bimetallic composite tubes without replacing the first roll. This solves the problems of low production efficiency, insufficient equipment utilization, and high production costs caused by the frequent shutdowns for roll changes or production line changes required by traditional rolling mills when producing different specifications of products. At the same time, the first support is driven by the drive assembly, and the rotation of the first roll is achieved by the meshing of the first gear and the first rack. This enables the synchronous drive of multiple first rolls, ensuring the synchronization of rolling actions. Furthermore, it eliminates the need for an independent drive mechanism for each first roll, reducing equipment manufacturing costs and maintenance difficulty, and achieving high-efficiency production of bimetallic composite tubes of various specifications. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0042] Figure 1 This is a schematic diagram of the overall structure of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the overall structure of the first rolling mill of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0044] Figure 3 This is a schematic front view of the first rolling mill of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the first rolling mill and heating device of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0046] Figure 5 This is a top view schematic diagram of the first rolling mill and drive device of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the drive device and the first support of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0048] Figure 7 This is a side view schematic diagram of the first rolling mill and drive device of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0049] Figure 8 This is a top view schematic diagram of the feeding device of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of the feeding frame of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0051] Figure 10 This is a side view schematic diagram of the pusher plate of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0052] Figure 11 This is a schematic diagram of the pusher plate and pusher rod of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0053] Figure 12 This is a schematic diagram of the mandrel and cooling nozzle of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention;

[0054] Figure 13 This is a schematic diagram of the cooling nozzle structure of a bimetallic composite tube rolling equipment proposed in an embodiment of the present invention.

[0055] Reference numerals: 10 is a bimetallic composite tube; 100 is a support platform; 110 is a first guide groove; 200 is a first rolling mill; 210 is a first support; 211 is a first protrusion; 220 is a first roll; 221 is a first annular groove; 222 is a first gear; 223 is a second gear; 300 is a second rolling mill; 310 is a second support; 320 is a second roll; 400 is a feeding device; 410 is a feeding frame; 420 is a feeding roll; 421 is a third annular groove; 430 is a second drive motor; 440 is a support roll group; 450 is a pusher plate; 451 is a push rod; 510 is a fixed frame; 511 is a first strip platform. 5110 is the first rack, 520 is the drive assembly, 521 is the drive frame, 522 is the first drive motor, 523 is the first drive gear, 524 is the first transmission rod, 5240 is the first driven gear, 5241 is the second drive gear, 525 is the second transmission rod, 5250 is the crank gear, 5251 is the second protrusion, 526 is the drive connecting rod, 600 is the mandrel, 700 is the cooling nozzle, 710 is the annular gap, 720 is the guide fin, 800 is the heating device, 810 is the heating bracket, 820 is the electromagnetic heating coil, 900 is the support frame, 910 is the second strip platform, and 911 is the second rack. Detailed Implementation

[0056] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0057] Please see Figure 1 and Figure 2The bimetallic composite tube rolling equipment provided in this embodiment of the invention includes a support platform 100, a first rolling mill 200, a feeding device 400, a fixing frame 510, and a drive assembly 520. The first rolling mill 200 includes a first support 210 and two first rolls 220 arranged vertically opposite each other. The first support 210 is movably mounted on the support platform 100 along the rolling direction, and the first rolls 220 are rotatably mounted on the first support 210. The outer circumferential surface of each first roll 220 has multiple radially recessed first annular grooves 221 along its own axial direction. The multiple first annular grooves 221 located on the two first rolls 220 correspond one-to-one. The space between two corresponding first annular grooves 221 is used to accommodate and roll the bimetallic composite tube 10. The non-corresponding first annular grooves... The groove widths of 221 are different; the two first rolls 220 are coaxially fixed with first gears 222 at both ends; the feeding device 400 is set on the support platform 100 and is used to drive the bimetallic composite tube 10 to move along the rolling direction; the fixed frame 510 is fixed on the support platform 100, and the fixed frame 510 is provided with a first strip platform 511. The upper and lower surfaces of the first strip platform 511 are fixed with first racks 5110. The guiding direction of the first racks 5110 is the same as the rolling direction. The first strip platform 511 is set in the gap between the two first rolls 220. The first racks 5110 mesh with the first gears 222; the driving assembly 520 is set on the support platform 100 and is connected to the first support 210 and is used to drive the first support 210 to move.

[0058] For specific implementation details, please refer to: Figure 1 and Figure 2The feeding device 400 feeds multiple bimetallic composite tubes 10 of different specifications into the first rolling mill 200 along the rolling direction. The drive assembly 520 drives the first support 210 to move along the rolling direction. At this time, the first roll 220 set on the first support 210 moves with the first support 210. Since the first gears 222 at both ends of the first roll 220 mesh with the first rack 5110 set on the fixed frame 510, the first gears 222 roll on the first rack 5110, thereby driving the first roll 220 coaxial with the first gears 222 to rotate. The first roll 220 rotates on the first support 210 and moves back and forth along the rolling direction with the first rolling mill 200. The first roll 220 can perform rolling and rolling on the surface of the bimetallic composite tube 10 while moving and rotating, so that multiple bimetallic composite tubes 10 of different specifications are rolled in the first annular groove 221 with the corresponding groove width. This configuration, by setting multiple first annular grooves 221 with different groove widths on the first roll 220 as rolling channels, allows for the direct adaptation and rolling of various specifications of bimetallic composite tubes 10 without replacing the first roll 220. This solves the problems of low production efficiency, insufficient equipment utilization, and high production costs caused by the frequent shutdowns for roll changes or production line changes required by traditional rolling mills when producing products of different specifications. At the same time, the first support 210 is driven by the drive assembly 520, and the rotation of the first roll 220 is achieved by the meshing of the first gear 222 and the first rack 5110. This enables the synchronous driving of multiple first rolls 220, ensuring the synchronization of rolling actions. Furthermore, it eliminates the need for an independent drive mechanism for each first roll 220, reducing equipment manufacturing costs and maintenance difficulty, and achieving high-efficiency production of bimetallic composite tubes 10 of various specifications.

[0059] As one possible implementation, such as Figure 1 and Figure 2 As shown, the bottom surface of the first annular groove 221 is provided with a corrugated structure, which consists of crests and troughs. The crests and troughs are alternately arranged along the axial direction of the first roll 220 and extend along the circumference of the first roll 220. The bimetallic composite tube rolling equipment also includes a second rolling mill 300, which is located downstream of the first rolling mill 200 along the rolling direction. The second rolling mill 300 includes a second support 310 and two second rolls 320 arranged vertically opposite each other. The second support 310 is fixed on the support platform 100, and the second rolls 320 are rotatably mounted on the second support 310. The outer circumferential surface of the second roll 320 is provided with multiple radially recessed second annular grooves along its own axial direction. The bottom surface of the second annular groove is a smooth curved surface. The multiple second annular grooves located on the two second rolls 320 correspond one-to-one. The space between the two corresponding second annular grooves is used to accommodate and roll the bimetallic composite tube 10. The groove widths of the non-corresponding second annular grooves are different from each other.

[0060] During operation, the bimetallic composite tube 10 is first fed into the first rolling mill 200. The first annular groove 221 with a corrugated bottom accommodates and rolls the bimetallic composite tube 10. The bottom surface of the first annular groove 221 contacts the bimetallic composite tube 10. Under the stress generated by the corrugated structure, the inner and outer metal layers of the bimetallic composite tube 10 undergo plastic deformation and interlock with each other, achieving preliminary composite. Subsequently, the bimetallic composite tube 10 is fed into the second rolling mill 300, where the smooth surface of the second annular groove performs finishing rolling on the bimetallic composite tube 10 to eliminate the corrugations on the surface of the bimetallic composite tube 10 after rolling at the first annular groove 221, control the outer diameter of the bimetallic composite tube 10, and obtain a bimetallic composite tube 10 with a smooth surface. This configuration, by setting up the first annular groove 221 and the second annular groove, allows the surface of the bimetallic composite tube 10 to first contact the corrugated structure for rough rolling to promote the bonding of the two metal interfaces, and then perform finish rolling to ensure the final dimensional accuracy and surface quality of the bimetallic composite tube 10. A single production process can complete the processing of multiple bimetallic composite tubes 10 of different specifications from composite forming to finish rolling, avoiding the drawbacks of frequent roll changes or production line adjustments required when rolling multiple bimetallic composite tubes 10 of different specifications in traditional production. This improves equipment utilization and production efficiency, and reduces production costs.

[0061] As one possible implementation, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the first support 210 is provided with a first protrusion 211, and the drive assembly 520 includes a drive frame 521, a first drive motor 522, a crank gear 5250, a gear transmission group, and a drive connecting rod 526. The drive frame 521 is fixedly mounted on the support platform 100 and is located upstream of the first rolling mill 200 along the rolling direction. The first drive motor 522 is fixedly mounted on the drive frame 521. The end face of the crank gear 5250 is eccentrically provided with a second protrusion 5251. The first drive motor 522 is connected to the crank gear through the gear transmission group, which is used to drive the crank gear 5250 to rotate. The two ends of the drive connecting rod 526 are respectively hinged to the first protrusion 211 and the second protrusion 5251, and are used to drive the first support 210 to reciprocate as the crank gear 5250 rotates.

[0062] During operation, the drive end of the first drive motor 522 rotates, driving the crank gear 5250 to rotate via the gear transmission set. This causes the second protrusion 5251, eccentrically mounted on the end face of the crank gear 5250, to perform circumferential motion, which in turn drives the first support 210 to reciprocate along the rolling direction via the drive connecting rod 526. This configuration enables the reciprocating motion of the first support 210, which in turn drives the first roll 220 to rotate, achieving the rolling of the bimetallic composite tube 10. The reciprocating motion of the first support 210 allows the first roll 220 to reciprocate along the axial direction of the bimetallic composite tube 10, enhancing the rolling effect.

[0063] In some embodiments, the drive assembly 520 may be a hydraulic cylinder or an electric cylinder. The drive end of the hydraulic cylinder or electric cylinder is connected to the first support 210. By extending or retracting the drive end, the first support 210 is directly driven to reciprocate along the rolling direction, thereby realizing the rolling of the bimetallic composite tube 10.

[0064] As one possible implementation, such as Figure 5 and Figure 7 As shown, the gear transmission assembly includes a first driving gear 523, a first transmission rod 524, and a second transmission rod 525. The first driving gear 523 is connected to the drive end of the first drive motor 522. The first transmission rod 524 is rotatably mounted on the drive frame 521. A first driven gear 5240 is coaxially fixed on the first transmission rod 524. The first driven gear 5240 meshes with the first driving gear 523 to drive the first transmission rod 524 to rotate. A second driving gear 5241 is coaxially fixed at both ends of the first transmission rod 524. The second transmission rod 525 is rotatably mounted on the drive frame 521. A crank gear 5250 is coaxially fixed on the second transmission rod 525 and meshes with the second driving gear 5241.

[0065] During operation, the drive end of the first drive motor 522 rotates, driving the first driving gear 523 to rotate. The first driving gear 523 drives the first driven gear 5240 meshing with it to rotate. The first driven gear 5240 drives the first transmission rod 524 to rotate. The rotation of the first transmission rod 524 drives the second driving gear 5241 fixed at both ends of the first transmission rod 524 to rotate. The second driving gear 5241 drives the crank gear 5250 meshing with it to rotate, causing the second protrusion 5251 eccentrically mounted on the end face of the crank gear 5250 to perform circumferential motion. This motion, through the drive connecting rod 526, drives the first support 210 to reciprocate along the rolling direction. This configuration, by setting up a multi-stage gear transmission pair, allows the drive assembly 520 to smoothly transmit greater power, ensuring the smooth and reliable movement of the first support 210.

[0066] As one possible implementation, such as Figure 1 , Figure 8 and Figure 9 As shown, the feeding device 400 includes a feeding frame 410, two oppositely arranged feeding rollers 420, and a second drive motor 430. The feeding frame 410 is fixed to the support platform 100 and is located upstream of the first rolling mill 200 along the rolling direction. The feeding rollers 420 are rotatably mounted on the feeding frame 410. The outer circumferential surface of the feeding rollers 420 has multiple radially recessed third annular grooves 421 along its own axial direction. The multiple third annular grooves 421 located on the two feeding rollers 420 correspond one-to-one. The space between two corresponding third annular grooves 421 is used to accommodate the bimetallic composite tube 10. The groove widths of the non-corresponding third annular grooves 421 are different from each other. The second drive motor 430 is mounted on the feeding frame 410, and the drive end of the second drive motor 430 is connected to the feeding rollers 420 to drive the feeding rollers 420 to rotate.

[0067] Specifically, the feeding frame 410 is fixedly installed on the support platform 100 and is located upstream of the first rolling mill 200 along the rolling direction. Two feeding rollers 420 are rotatably mounted on the feeding frame 410 via bearings. Multiple third annular grooves 421 are axially formed on the outer circumferential surface of the feeding rollers 420. The third annular grooves 421 on the two feeding rollers 420 are arranged opposite each other to form a channel for accommodating the bimetallic composite tube 10. A second drive motor 430 is fixedly installed on the feeding frame 410, and its output shaft is connected to the shaft end of the feeding rollers 420 to drive the feeding rollers 420 to rotate. During operation, the second drive motor 430 starts and drives the two feeding rollers 420 to rotate relative to each other. The bimetallic composite tube 10, placed between the two opposing third annular grooves 421, is clamped and conveyed forward under friction until it is fed into the downstream first rolling mill 200 for rolling. This configuration ensures stable transport of the bimetallic composite pipe 10 and improves production efficiency.

[0068] It should be noted that during the rolling of the bimetallic composite tube 10, the bimetallic composite tube rolling equipment adopts an "intermittent feeding and segmented rolling" rolling method. Specifically, the feeding device 400, according to the preset single rolling length, drives two feeding rollers 420 to rotate relative to each other via the second drive motor 430. The bimetallic composite tube 10 is clamped by the friction between the third annular groove 421 and the outer wall of the bimetallic composite tube 10, feeding a set length of bimetallic composite tube 10 into the first annular groove 221 of the first roller 220. Subsequently, the feeding device 400 stops feeding, the second drive motor 430 stops working, and at this time, the drive assembly 520 drives the first support 210 to move along the rolling direction, causing the first roller 220 to move synchronously. The meshing of gear 222 with the first rack 5110 enables the rotation of the first roll 220, which rolls a section of the bimetallic composite tube 10 that has been fed to the first mill 200 until the section of the bimetallic composite tube 10 is rolled. After the section of the bimetallic composite tube 10 is rolled, the feeding device 400 is restarted, and the second drive motor 430 drives the feeding roll 420 to continue to advance the bimetallic composite tube 10, sending the lower unrolled part of the bimetallic composite tube 10 into the first mill 200 for rolling. Then the feeding device 400 is paused, and the first roll 220 repeats the above rolling action. Through this cycle of feeding, pausing, rolling, and refeeding, the rolling process of the bimetallic composite tube 10 is completed in segments along the axial direction, ensuring that the bimetallic composite tube 10 is fully rolled.

[0069] Furthermore, such as Figure 1 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the feeding device 400 also includes a support roller group 440, a pusher plate 450, and a driving component; wherein, the support roller group 440 is disposed on the side of the feeding frame 410 away from the first rolling mill 200, the support roller group 440 is disposed on the support platform 100, and the roller surface of the support roller group 440 is provided with a plurality of radially recessed annular grooves along its own axial direction, the annular grooves being used to support the bimetallic composite tube 10; the bottom of the pusher plate 450 is movablely disposed on the support platform 100 along the rolling direction, and a plurality of push rods 451 are fixed on the pusher plate 450, one end of the push rod 451 being used to abut against one end of the bimetallic composite tube 10 and push the bimetallic composite tube 10; the driving end of the driving component is connected to the pusher plate 450, and the driving component is used to drive the pusher plate 450 to move.

[0070] Specifically, please refer to Figure 8The support roller assembly 440 is located on the side of the feed frame 410 away from the first rolling mill 200. The support roller assembly 440 includes multiple support rollers arranged sequentially along the rolling direction. The annular grooves on the support rollers are used to support the bimetallic composite tube 10. During operation, when feeding is required, the bimetallic composite tube 10 is placed in the annular groove of the support roller. The drive component pushes the pusher plate 450 to move towards the first rolling mill 200 along the rolling direction. The push rod 451 on the pusher plate 450 moves forward with the pusher plate 450 and abuts against the end of the bimetallic composite tube 10, thereby smoothly pushing the bimetallic composite tube 10 through the area of ​​the support roller assembly 440 and feeding it into the feed roller 420. This configuration, through the cooperation of the pusher plate 450 and the support roller group 440, achieves auxiliary feeding and alignment of the long bimetallic composite tube 10, ensuring that the bimetallic composite tube 10 maintains a good centering state before entering the feeding roller 420, avoiding the problem of inaccurate feeding caused by the misalignment of the bimetallic composite tube 10, and improving the reliability of the feeding process. It is understood that this drive component can adopt different forms such as a hydraulic cylinder or a screw-slider mechanism.

[0071] As one possible implementation, such as Figure 12 As shown, the bimetallic composite tube rolling equipment also includes a mandrel support, multiple mandrels 600, and a cooling nozzle 700. The mandrel support is located upstream of the first rolling mill 200 along the rolling direction. The mandrels 600 are movably mounted on the mandrel support along the rolling direction and are used to pass through the bimetallic composite tube 10. The mandrels 600 have a hollow structure, and one end of the mandrel 600 near the first rolling mill 200 is closed. The cooling nozzle 700 is coaxially arranged inside the mandrel 600, and an annular gap 710 is formed between the outer wall of the cooling nozzle 700 and the inner wall of the mandrel 600. The outlet of the cooling nozzle 700 is located at the closed end of the mandrel 600 and does not contact the mandrel 600. The cooling nozzle 700 is used to introduce coolant into the mandrel 600, and the annular gap 710 is used for coolant flow. The open end of the mandrel 600 and the inlet end of the cooling nozzle 700 are connected to the external cooling medium circulation device through a dual-channel rotary joint. The inner channel of the dual-channel rotary joint connects the inlet end of the cooling nozzle 700 and the outlet of the external cooling medium circulation device, while the outer channel of the dual-channel rotary joint connects the annular gap 710 and the inlet of the external cooling medium circulation device.

[0072] It should be noted that the extension direction of the mandrel 600 is parallel to the rolling direction, and multiple mandrels 600 correspond one-to-one with multiple bimetallic composite tubes 10. The mandrel 600 passes through the corresponding bimetallic composite tube 10 to form a support. One end of the mandrel 600 is clamped on the mandrel support and advances along the rolling direction under the clamping action of the mandrel support. The advancing speed of the mandrel 600 is lower than the feed speed of the bimetallic composite tube 10, that is, the bimetallic composite tube 10 can slide on the mandrel 600. Moreover, a mandrel 600 passes through every two corresponding first annular grooves 221 to ensure that each bimetallic composite tube 10 can be effectively supported throughout the rolling process.

[0073] During operation, multiple mandrels 600 are simultaneously pushed into the gap between multiple first annular grooves 221 of the first roll 220. Under the feeding action of the feeding device 400, the bimetallic composite tube 10 slides along the mandrel 600 and enters the first annular groove 221 for rolling. After rolling is completed, the mandrel 600 is returned to its original position under the clamping action of the mandrel support to accommodate the remaining bimetallic composite tubes 10 to be processed. When the mandrel 600 passes through the bimetallic composite tube 10 for support, the cooling medium flows out from the outlet of the external cooling medium circulation device, enters the cooling spray pipe 700 through the inner channel of the dual-channel rotary joint, and then flows through the outer channel of the dual-channel rotary joint from the annular gap 710 into the inlet of the external cooling medium circulation device, realizing the circulation of the cooling medium within the mandrel 600. During this process, the coolant continuously carries away the heat absorbed by the mandrel 600 from the bimetallic composite tube 10. By cooling the mandrel 600 by circulating coolant inside it, the mandrel 600 is kept at a suitable working temperature during operation, avoiding the problems of deformation instability and adhesion to the bimetallic composite tube 10 caused by overheating. This improves the service life of the mandrel 600 and the stability during the rolling process, and ensures the quality of the inner surface of the bimetallic composite tube 10.

[0074] It should be noted that you should refer to [link / reference]. Figure 10 When the bimetallic composite tube 10 is supported by the mandrel 600, the push rod 451 is a hollow structure, through which the mandrel 600 passes. The bimetallic composite tube 10 is sleeved on the outside of the mandrel 600. When the push rod 451 is moved, it pushes the bimetallic composite tube 10 sleeved on the outside of the mandrel 600.

[0075] In some embodiments, the outer peripheral surface of the cooling nozzle 700 is provided with axially spaced flange structures. The two ends of the flange structures are respectively welded to the outer peripheral surface of the cooling nozzle 700 and the inner peripheral surface of the mandrel 600 to achieve the effect of fixing the cooling nozzle 700 inside the mandrel 600. At the same time, the flange structure can be columnar, strip, or other structures to achieve a stable connection without affecting the formation of the annular gap 710, which serves as a coolant flow channel.

[0076] Furthermore, such as Figure 13 As shown, the outer wall of the cooling nozzle 700 is also provided with guide fins 720, which are spirally arranged on the outer wall of the cooling nozzle 700. During operation, after the coolant is sprayed out from the outlet of the cooling nozzle 700, it is guided by the spirally arranged guide fins 720 as it flows within the annular gap 710, thereby forming strong turbulence. This enhances the heat exchange effect between the coolant and the inner wall of the mandrel 600, ensures the temperature uniformity of the mandrel 600, and prevents damage caused by local overheating.

[0077] As one possible implementation, such as Figure 4 , Figure 5 and Figure 7 As shown, the bimetallic composite tube rolling equipment also includes an induction heating device 800, which includes a heating bracket 810 and an electromagnetic heating coil 820. The heating bracket 810 is fixedly mounted on the support platform 100 and is located upstream of the first rolling mill 200 along the rolling direction. The electromagnetic heating coil 820 is fixedly mounted on the heating bracket 810 and is used to surround the outer periphery of the bimetallic composite tube 10 to heat the bimetallic composite tube 10.

[0078] During operation, when the bimetallic composite tube 10 is conveyed to the induction heating device 800, the electromagnetic heating coil 820 is energized. The magnetic field generated by the coil induces eddy currents in the bimetallic composite tube 10 passing through the coil, thereby heating the bimetallic composite tube 10 to the preset rolling temperature. This setup, through online heating, preheats the bimetallic composite tube 10 before rolling, reducing the metal's deformation resistance and improving its plasticity, creating favorable process conditions for subsequent rolling. Furthermore, by allowing the bimetallic composite tube 10 to pass through the electromagnetic heating coil 820, the coil diameter of different electromagnetic heating coils 820 can be adjusted to easily accommodate bimetallic composite tubes 10 of different diameters, conveniently achieving heating of bimetallic composite tubes 10 of different specifications.

[0079] As one possible implementation, such as Figure 2 As shown, a first guide groove 110 is also provided on the bearing platform 100. The extension direction of the first guide groove 110 is parallel to the rolling direction, and the first bracket 210 is guided and disposed in the first guide groove 110.

[0080] Specifically, the first guide groove 110 on the bearing platform 100 extends parallel to the rolling direction, and the first support 210 is slidably fitted within the first guide groove 110. During operation, when the first support 210 moves, the first guide groove 110 rigidly constrains and guides the first support 210, ensuring that the first support 210 always moves along the preset rolling direction. This prevents the first support 210 from deviating or twisting during movement, providing a stable motion foundation for the entire transmission system and improving the stability and transmission efficiency of the rolling process.

[0081] As one possible implementation, such as Figure 2 As shown, the shaft segments between the two axial ends of the first rolls 220 are also coaxially fixed with second gears 223. The bimetallic composite tube rolling equipment also includes a support frame 900, which is fixedly mounted on the bearing platform 100. A second strip platform 910 is provided on the support frame 900. A second rack 911 is fixedly mounted on both the upper and lower surfaces of the second strip platform 910. The guiding direction of the second rack 911 is the same as the rolling direction. The second strip platform 910 is located in the gap between the two first rolls 220. The second rack 911 is used to mesh with the second gear 223.

[0082] Specifically, the support frame 900 is fixedly mounted on the bearing platform 100, and the second strip platform 910 is located between the two first rolls 220. The second racks 911 fixed on the upper and lower surfaces of the second strip platform 910 are arranged parallel to the rolling direction, and the second racks 911 mesh with the second gear 223 in the middle of the shaft section of the first roll 220. During operation, when the first support 210 drives the first roll 220 to move along the rolling direction, the second gear 223 moves with the first roll 220, and the second gear 223 meshes with the second rack 911 on the support frame 900. Therefore, the support frame 900 applies additional rotational driving force and support to the first roll 220. This configuration, by adding a second gear 223 at the shaft section between the two axial ends of the first roll 220 and making the second gear 223 mesh with the second rack 911, enhances the bending stability of the longer first roll 220 during the rolling process, ensures the uniform distribution of rolling force along the entire length of the first roll 220, and improves the dimensional accuracy and surface quality of the bimetallic composite tube 10.

[0083] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0084] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bimetallic composite tube rolling equipment, characterized in that, include: Support platform; The first rolling mill includes a first support and two first rolls arranged vertically opposite each other. The first support is movably mounted on the bearing platform along the rolling direction, and the first rolls are rotatably mounted on the first support. The outer circumferential surface of the first rolls has a plurality of radially recessed first annular grooves along their own axial direction. The plurality of first annular grooves located on the two first rolls correspond one-to-one. The space between two corresponding first annular grooves is used to accommodate and roll bimetallic composite tubes. The groove widths of the non-corresponding first annular grooves are different from each other. The two axial ends of the two first rolls are coaxially fixed with first gears. A feeding device is provided on the support platform and is used to drive the bimetallic composite tube to move along the rolling direction; A fixed frame is fixedly mounted on the support platform. A first strip platform is provided on the fixed frame. A first rack is fixed on both the upper and lower surfaces of the first strip platform. The guiding direction of the first rack is the same as the rolling direction. The first strip platform is located in the gap between the two first rolls. The first rack meshes with the first gear. A drive component is disposed on the support platform and connected to the first bracket for driving the first bracket to move.

2. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The bottom surface of the first annular groove is provided with a corrugated structure, which is composed of wave crests and wave troughs. The wave crests and wave troughs are alternately arranged along the axial direction of the first roll and extend along the circumference of the first roll. The bimetallic composite tube rolling equipment further includes a second rolling mill, which is located downstream of the first rolling mill along the rolling direction. The second rolling mill includes a second support and two second rolls arranged vertically opposite each other. The second support is fixed to the bearing platform, and the second rolls are rotatably mounted on the second support. The outer circumferential surface of the second rolls has multiple radially recessed second annular grooves along their own axial direction. The bottom surface of the second annular grooves is a smooth curved surface. The multiple second annular grooves located on the two second rolls correspond one-to-one. The space between two corresponding second annular grooves is used to accommodate and roll the bimetallic composite tube. The groove widths of the non-corresponding second annular grooves are different from each other.

3. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The first bracket is provided with a first protrusion, and the driving assembly includes: A drive frame is fixedly mounted on the support platform and located upstream of the first rolling mill along the rolling direction. The first drive motor is fixedly mounted on the drive frame. A crank gear, wherein a second protrusion is eccentrically provided on the end face of the crank gear; A gear transmission assembly is provided, wherein the first drive motor is connected to the crank gear via the gear transmission assembly, and the gear transmission assembly is used to drive the crank gear to rotate; A drive link, the two ends of which are respectively hinged to the first protrusion and the second protrusion, is used to drive the first bracket to reciprocate as the crank gear rotates.

4. The bimetallic composite tube rolling equipment according to claim 3, characterized in that, The gear transmission assembly includes: The first driving gear is connected to the driving end of the first drive motor; A first transmission rod is rotatably mounted on the drive frame. A first driven gear is coaxially fixed on the first transmission rod. The first driven gear meshes with the first driving gear to drive the first transmission rod to rotate. A second driving gear is coaxially fixed at both ends of the first transmission rod. The second transmission rod is rotatably mounted on the drive frame, and the crank gear is coaxially fixed on the second transmission rod, and the crank gear meshes with the second drive gear.

5. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The feeding device includes: A feeding frame is fixed to the support platform and is located upstream of the first rolling mill along the rolling direction; Two feeding rollers are arranged opposite each other and are rotatably mounted on the feeding frame. The outer circumferential surface of the feeding rollers is provided with multiple radially recessed third annular grooves along their own axial direction. The multiple third annular grooves located on the two feeding rollers correspond one to one. The space between two corresponding third annular grooves is used to accommodate the bimetallic composite tube. The groove widths of the non-corresponding third annular grooves are different from each other. A second drive motor is mounted on the feeding frame, and its drive end is connected to the feeding roller to drive the feeding roller to rotate.

6. The bimetallic composite tube rolling equipment according to claim 5, characterized in that, The feeding device further includes: A support roller assembly is disposed on the side of the feeding frame away from the first rolling mill. The support roller assembly is disposed on the bearing platform. The roller surface of the support roller assembly has a plurality of radially recessed annular grooves along its own axial direction. The annular grooves are used to support the bimetallic composite tube. A pusher plate, the bottom of which is movable on the support platform along the rolling direction, and a plurality of push rods are fixed on the pusher plate. One end of each push rod is used to abut against one end of the bimetallic composite tube and push the bimetallic composite tube. A driving component, the driving end of which is connected to the pusher plate, is used to drive the pusher plate to move.

7. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The bimetallic composite tube rolling equipment also includes: Mandrel holder, along the rolling direction, the mandrel holder is disposed upstream of the first rolling mill; Multiple mandrels are provided, which are movable along the rolling direction and mounted on the mandrel support. The mandrels are used to pass through the bimetallic composite tube. The mandrels have a hollow structure and are closed at the end near the first rolling mill. The mandrels are used to support the bimetallic composite tube. A cooling nozzle is coaxially disposed inside the core rod, and an annular gap is formed between the outer wall of the cooling nozzle and the inner wall of the core rod. The outlet of the cooling nozzle faces the closed end of the core rod. The cooling nozzle is used to introduce coolant into the core rod, and the annular gap is used for the flow of the coolant.

8. The bimetallic composite tube rolling equipment according to claim 7, characterized in that, The outer wall of the cooling nozzle is also provided with guide fins, which are spirally arranged on the outer wall of the cooling nozzle.

9. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The bimetallic composite tube rolling equipment also includes an induction heating device, which comprises: A heating bracket is fixedly mounted on the support platform and located upstream of the first rolling mill along the rolling direction; An electromagnetic heating coil is fixedly mounted on the heating bracket and is used to surround the outer periphery of the bimetallic composite tube to heat the bimetallic composite tube.

10. The bimetallic composite tube rolling equipment according to claim 1, characterized in that, The shaft segments between the two axial ends of the first rolls are also coaxially fixed with second gears. The bimetallic composite tube rolling equipment also includes a support frame, which is fixedly mounted on the bearing platform. A second strip platform is provided on the support frame. A second rack is fixedly mounted on both the upper and lower surfaces of the second strip platform. The guiding direction of the second rack is parallel to the rolling direction. The second strip platform is located in the gap between the two first rolls. The second rack is used to mesh with the second gear.

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