Bimetal composite pipe machining equipment and method for machining bimetal composite pipe

Abstract

The invention discloses double-metal composite pipe machining equipment and a method for machining a double-metal composite pipe. The double-metal composite pipe machining equipment comprises a supporting table, a machining table and a machining table, the sliding assembly is arranged on the supporting table and comprises a first sliding rail and a second sliding rail; the drilling device is arranged on the sliding assembly and used for drilling the pre-sleeved blank; the riveting device is arranged on the sliding assembly and used for riveting the inner base pipe and the outer covering pipe which are pre-sleeved with the blank; the clamping and feeding device is used for clamping the pre-sleeved blank and driving the pre-sleeved blank to move and rotate; and the pipe rolling unit is arranged on the supporting table and used for rolling the pre-sleeved blank to form the bimetal composite pipe. When the device is applied, the inner base pipe and the outer covering pipe do not need to be welded, but the inner base pipe and the outer covering pipe are riveted and fixed, so that the inner base pipe and the outer covering pipe are prevented from being staggered in the rolling and compounding process.

Description

Technical Field

[0001] The present application relates to the technical field of metal pipe processing, and in particular to a bimetallic composite pipe processing device and a method for processing a bimetallic composite pipe. Background Art

[0002] Bimetallic composite pipes are made of two different metals bonded together through the inner and outer interfaces. They have the excellent properties of each component metal, and can reduce the use of precious metal materials, save costs, and have good technical and economic performance. Bimetallic composite pipes are widely demanded in high-tech industries such as petrochemicals, marine engineering, aerospace, and national defense due to their excellent mechanical properties.

[0003] At present, the common preparation processes of bimetallic composite pipes include centrifugal casting, explosive welding, hydraulic expansion forming and other process methods. However, the centrifugal casting bimetallic composite pipe has low inner wall diameter accuracy, poor casting quality, and large processing allowance; the explosive welding bimetallic composite pipe has poor interface bonding quality and serious environmental pollution; the hydraulic expansion bimetallic composite pipe interface bonding is mechanical bonding, which seriously limits the performance of the bimetallic composite pipe.

[0004] The rolling composite method has become one of the most promising preparation technologies for bimetallic composite pipes due to its stable process and high production efficiency. Among them, the three-roller oblique rolling composite process can realize the continuous forming of bimetallic composite pipes and prepare high-performance bimetallic composite pipes. However, this process has high requirements for pre-set blanks. It is usually necessary to weld the pre-set blanks to limit the mutual misalignment of the inner base pipe and the outer coating pipe during the rolling composite process, and ensure that the pre-set blanks are deformed synergistically during the rolling composite process to achieve stable interface bonding. This seriously limits the preparation of difficult-to-weld or non-weldable metal composite pipes such as titanium / aluminum, steel / copper, magnesium / aluminum, and copper / aluminum, and greatly reduces production efficiency. Summary of the invention

[0005] The purpose of the present application is to provide a bimetallic composite pipe processing device and a method for processing a bimetallic composite pipe, so as to solve the problem that the inner base pipe and the outer cladding pipe that cannot be welded are misaligned with each other during the rolling and cladding process, and the problem that the connection between the front and rear processes requires manual transfer of the pre-packaged blank to the pipe rolling unit, resulting in low production efficiency.

[0006] In order to achieve the above objectives, this application provides the following technical solutions: A bimetallic composite pipe processing equipment, comprising: Support table; A sliding assembly is arranged on the support platform, the sliding assembly comprises a first sliding rail and a second sliding rail, and an extension direction of the first sliding rail intersects with an extension direction of the second sliding rail; A drilling device disposed on the sliding assembly, the drilling device being able to slide along the extension direction of the first slide rail and the extension direction of the second slide rail, and the drilling device being used to drill holes in the pre-set blank; A riveting device disposed on the sliding assembly, the riveting device being able to slide along the extension direction of the first slide rail and the extension direction of the second slide rail, the riveting device being used to rivet the inner base tube and the outer covering tube of the pre-sheathed blank; A clamping and feeding device, used for clamping the pre-mounted blank and driving the pre-mounted blank to move and rotate; A tube rolling mill set is arranged on the support platform, and the tube rolling mill set is used for rolling the pre-set blank to form a bimetallic composite tube.

[0007] In one implementation, the number of the first slide rails is two, and both ends of the second slide rail are respectively arranged on the two first slide rails; The drilling device and the riveting device are both arranged on the second slide rail.

[0008] In one implementation, the first slide rail includes a first screw guide rail, and the sliding assembly further includes a first rotation driving member capable of driving the first screw guide rail to rotate; The second slide rail includes a second screw guide rail, and the sliding assembly also includes a second rotation driving member capable of driving the second screw guide rail to rotate.

[0009] In one implementation, the drilling device and the riveting device are both arranged on the second screw guide rail through a connecting seat, the connecting seat includes an internal threaded hole that can cooperate with the second screw guide rail, and the connecting seat includes a plurality of split bodies distributed circumferentially along its internal threaded hole, and the plurality of split bodies can be away from the second screw guide so that the internal threaded hole of the connecting seat is disengaged from the second screw guide, and the plurality of split bodies can be close to the second screw guide so that the internal threaded hole of the connecting seat is threadably matched with the second screw guide rail.

[0010] In one implementation, a first limiter and a first position sensor are disposed near the first end of the second lead screw guide rail, and the first limiter is located on a side of the first position sensor close to the first end of the second lead screw guide rail; a second limiter and a second position sensor are disposed near the second end of the second lead screw guide rail, and the second limiter is located on a side of the second position sensor close to the second end of the second lead screw guide rail; After the riveting device moves along the second screw guide rail to between the first position sensor and the first limit piece, the internal threaded hole of the connecting seat of the riveting device disengages from the second screw guide rail; after the drilling device moves along the second screw guide rail to between the second position sensor and the second limit piece, the internal threaded hole of the connecting seat of the drilling device disengages from the second screw guide rail.

[0011] In one implementation, the connecting seat further includes a split driving member capable of driving the split body to approach or move away from the second screw guide rail; The split driving component includes a telescopic cylinder and / or a linear motor.

[0012] In one implementation, the drilling device includes a third screw guide, a third rotating drive member capable of driving the third screw guide to rotate, and a puncher arranged on the third screw guide, and the extension direction of the third screw guide is along the vertical direction; and / or, the riveting device includes a fourth screw guide, a fourth rotating drive member capable of driving the fourth screw guide to rotate, and a riveting gun arranged on the fourth screw guide, and the extension direction of the fourth screw guide is along the vertical direction.

[0013] In one implementation, the drilling device includes a third screw guide rail, a third rotation driving member capable of driving the third screw guide rail to rotate, and a puncher arranged on the third screw guide rail, and the drilling device also includes a third limiter arranged near the third screw guide rail; and / or, The riveting device includes a fourth screw guide rail, a fourth rotation driving member capable of driving the fourth screw guide rail to rotate, and a riveting gun arranged on the fourth screw guide rail; the riveting device also includes a fourth limiter arranged near the fourth screw guide rail.

[0014] In one implementation, the clamping and feeding device includes a base, a mandrel trolley arranged on the base, and a third slide rail arranged on the base. The clamping and feeding device also includes a clamp arranged on the third slide rail. The clamp can move along the extension direction of the third slide rail to approach or move away from the riveting device and the drilling device. The clamp can also drive the pre-assembled blank to rotate.

[0015] When the bimetallic composite pipe processing equipment provided by the present application is used, the pre-set blank is first set on the clamping and feeding device, the pre-set blank is clamped by the clamping and feeding device, and then the clamping and feeding device drives the pre-set blank to move to the vicinity of the drilling device, the drilling device moves along the extension direction of the first slide rail, and then moves along the extension direction of the second slide rail, and finally moves the drilling device to a suitable position, and uses the drilling device to drill the end of the pre-set blank. It can be understood that in order to ensure that the inner base pipe and the outer coating pipe will not be misaligned during the rolling and compounding process, multiple holes can be processed on the end of the pre-set blank. Specifically, after processing a hole, the clamping and feeding device drives the pre-set blank to rotate a preset angle, and the drilling device drills the end of the pre-set blank again. After drilling, the riveting device moves along the extension direction of the first slide rail, and then moves along the extension direction of the second slide rail, and finally moves the riveting device to a suitable position, and uses the riveting device to rivet the multiple holes of the pre-set blank in sequence. After riveting is completed, the clamping and feeding device drives the pre-sheathed blank to move to the tube rolling unit, and at the same time, the clamping and feeding device moves the mandrel to the tube rolling unit. After the tube rolling unit bites the pre-sheathed blank, it will give the pre-sheathed blank a forward force along the axis. After receiving the force, the pre-sheathed blank will slip out of the clamping and feeding device, allowing the pre-sheathed blank to pass through the tube rolling unit smoothly to complete rolling and compounding, forming a bimetallic composite tube.

[0016] As can be seen from the above, in the process of producing bimetallic composite pipes using the bimetallic composite pipe processing equipment provided by the present application, it is not necessary to weld the inner base pipe and the outer coating pipe, but the inner base pipe and the outer coating pipe are riveted and fixed to prevent the inner base pipe and the outer coating pipe from being dislocated from each other during the rolling and compounding process. Compared with the prior art of relatively fixing the inner base pipe and the outer coating pipe by welding, the process flow is simplified, the operation is convenient, and it can be applied to the pre-installation and fixation of the inner base pipe and the outer coating pipe that are difficult to weld or cannot be welded, so as to prevent the inner base pipe and the outer coating pipe from being dislocated from each other during the rolling and compounding process.

[0017] In the present application, a drilling device, a riveting device and a tube rolling unit are arranged in sequence, and the drilling device and the riveting device are located at the inlet side of the tube rolling unit, so as to drill, rivet and roll the pre-set blank in sequence. Compared with the prior art in which the pre-set blank is first manually welded separately and then transferred to the rolling unit for rolling, the present application completes the riveting of the pre-set blank online through the drilling device and the riveting device, and then pushes it to the tube rolling unit online directly through the clamping and feeding device. After being received by the tube rolling unit, it is automatically and gradually separated from the clamping and feeding device under the driving of the rolling force of the tube rolling unit, realizing the automatic connection of the previous and next processes, without the need for manual transfer operations, forming a pipeline processing, and improving the processing efficiency of the bimetallic composite pipe.

[0018] A method for processing a bimetallic composite pipe, using any of the bimetallic composite pipe processing equipment described above, comprising the steps of: The inner base tube and the outer covering tube are nested to form a pre-nested blank; The pre-mounted blank is clamped by the clamping and feeding device, and the pre-mounted blank is driven to move to the vicinity of the drilling device and the riveting device; Using the drilling device to open at least one drill hole at the end of the pre-set blank; Using the riveting device to perform riveting at the drilled holes on the pre-set blank; The clamping and feeding device is used to transfer the pre-sheathed blank and the mandrel to a tube rolling unit for rolling, so that the pre-sheathed blank is formed into a bimetallic composite tube.

[0019] In one implementation, after the inner base tube and the outer covering tube are sheathed to form a pre-sheathed blank, and before the pre-sheathed blank is clamped by the clamping and feeding device, the following steps are further included: The two ends of the pre-mounted blank are sealed by using high temperature resistant flame retardant adhesive, and the blank is placed in a vacuum heating furnace for heat preservation within a preset temperature range.

[0020] In one implementation, before the inner base tube and the outer cladding tube are sheathed to form a pre-sheathed blank, the steps further include: grinding the outer surface of the inner base tube and the inner surface of the outer cladding tube; And / or, after the pre-assembled blank and the mandrel are transferred to the tube rolling unit by the clamping and feeding device and rolled to form the pre-assembled blank into a bimetallic composite tube, the method further comprises the step of shearing and cutting the bimetallic composite tube.

[0021] Compared with the prior art, the beneficial effects of the method for processing a bimetallic composite pipe provided in the present application are the same as the beneficial effects of the above-mentioned bimetallic composite pipe processing equipment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 An overall schematic diagram of a bimetallic composite pipe processing device provided in an embodiment of the present application; Figure 2 A schematic diagram of a riveting device and a drilling device provided in an embodiment of the present application on a sliding assembly; Figure 3 A schematic diagram of a first slide rail provided in an embodiment of the present application; Figure 4 A schematic diagram of a second slide rail provided in an embodiment of the present application; Figure 5 A schematic diagram of a drilling device provided in an embodiment of the present application; Figure 6A schematic diagram of a riveting device provided in an embodiment of the present application; Figure 7 A schematic diagram of a clamping and feeding device provided in an embodiment of the present application; Figure 8 A cross-sectional view of the riveted connection between the inner base tube and the outer covering tube provided in an embodiment of the present application.

[0023] Reference numerals: 1-support table, 2-riveting device, 3-drilling device, 4-base, 5-mandrel trolley, 6-mandrel, 7-clamp, 8-pre-set blank, 8a-inner base tube, 8b-outer tube, 9-second slide rail, 9a-second screw guide rail, 10-tube rolling unit, 11-first slide rail, 11a-first screw guide rail, 11b-first slideway, 12-first rotating drive member, 13-blocking member, 14-second rotating drive member, 15a-first limit member, 15b-first position sensor, 15c-second limit member, 15d-second position sensor, 16-third screw guide rail, 17-punching machine, 18-third rotating drive member, 19-third limit member, 20-fourth screw guide rail, 21-riveting gun, 22-fourth rotating drive member, 23-fourth limit member, 24-third slide rail, 25-rivet. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0027] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] See also Figure 1 The bimetallic composite pipe processing equipment provided in the embodiment of the present application includes a support platform 1, a sliding assembly, a drilling device 3, a riveting device 2, a clamping and feeding device and a pipe rolling unit 10.

[0030] The sliding assembly is arranged on the support platform 1, and the sliding assembly includes a first slide rail 11 and a second slide rail 9, and the extension direction of the first slide rail 11 and the extension direction of the second slide rail 9 intersect. Preferably, the extension direction of the first slide rail 11 and the extension direction of the second slide rail 9 can be arranged perpendicular to each other, so as to facilitate the drilling device 3 and the riveting device 2 to move to the target position quickly. The extension direction of the first slide rail 11 and the extension direction of the second slide rail 9 can be in the horizontal direction.

[0031] The drilling device 3 is arranged on the sliding assembly, and the drilling device 3 is used to drill the pre-mounted blank 8, that is, the drilling device 3 can drill the end of the pre-mounted blank 8 to form a borehole at least penetrating the outer tube 8b at the end of the pre-mounted blank 8, and preferably the depth of the borehole can be greater than the thickness of the outer tube 8b and less than the sum of the thickness of the outer tube 8b and the thickness of the inner base tube 8a, that is, the borehole penetrates the outer tube 8b but does not penetrate the inner base tube 8a. The drilling device 3 can slide along the extension direction of the first slide rail 11 and the extension direction of the second slide rail 9. Specifically, the drilling device 3 can be moved along the first slide rail 11 according to the position of the drilling device 3, and then moved along the second slide rail 9, and finally the drilling device 3 is moved to the target position, and the drilling device 3 drills the pre-mounted blank 8 at the target position.

[0032] The riveting device 2 is arranged on the sliding assembly, and the riveting device 2 is used to rivet the inner base tube 8a and the outer covering tube 8b of the pre-mounted blank 8, that is, the riveting device 2 is used to rivet and fix the inner base tube 8a and the outer covering tube 8b together at the drilling position. The riveting device 2 can slide along the extension direction of the first slide rail 11 and the extension direction of the second slide rail 9. Specifically, according to the position of the riveting device 2, the riveting device 2 can be moved along the first slide rail 11, and then moved along the second slide rail 9, and finally the riveting device 2 can be moved to a suitable position, and the riveting device 2 rivets the drilling position of the pre-mounted blank 8. After the inner base tube 8a and the outer covering tube 8b are riveted, as shown in FIG. Figure 8 As shown, the rivets 25 used for riveting can be solid rivets with stripes.

[0033] The clamping and feeding device is used to clamp the pre-set blank 8 and drive the pre-set blank 8 to move. Specifically, the clamping and feeding device can clamp the pre-set blank 8, and the clamping and feeding device can also drive the pre-set blank 8 to move closer to or away from the riveting device 2 and the drilling device 3. Specifically, the clamping and feeding device can drive the pre-set blank 8 to move horizontally. The clamping and feeding device can also drive the pre-set blank 8 to rotate, that is, the clamping and feeding device can also drive the pre-set blank 8 to rotate around its own axis, so as to drill and rivet the pre-set blank 8 at different circumferential positions.

[0034] The tube rolling mill 10 is arranged on the support platform 1, and is used for rolling the pre-assembled blank 8 to form a bimetallic composite tube. The tube rolling mill 10 may be a three-roller cross-rolling mill.

[0035] When the bimetallic composite pipe processing equipment provided by the present application is used, the pre-set blank 8 is first set on the clamping and feeding device, and the pre-set blank 8 is clamped by the clamping and feeding device, and then the clamping and feeding device drives the pre-set blank 8 to move to the vicinity of the drilling device 3, and the drilling device 3 moves along the extension direction of the first slide rail 11, and then moves along the extension direction of the second slide rail 9, and finally moves the drilling device 3 to a suitable position, and the end of the pre-set blank 8 is drilled by the drilling device 3. It can be understood that in order to ensure that the inner base tube 8a and the outer coating tube 8b will not be misaligned during the rolling and compounding process, multiple holes can be processed on the end of the pre-set blank 8. Specifically, after processing one hole, the clamping and feeding device drives the pre-set blank 8 to rotate a preset angle, and the drilling device 3 drills the end of the pre-set blank 8 again. After drilling is completed, the riveting device 2 moves along the extension direction of the first slide rail 11, and then moves along the extension direction of the second slide rail 9, and finally moves the riveting device 2 to a suitable position, and uses the riveting device 2 to rivet the multiple drilled holes of the pre-set blank 8 in sequence. After riveting is completed, the clamping and feeding device drives the pre-set blank 8 to move to the tube rolling unit 10, and the clamping and feeding device moves the mandrel 6 to the tube rolling unit 10. After the tube rolling unit 10 bites the pre-set blank 8, it will give the pre-set blank 8 a forward force along the axis. After receiving the force, the pre-set blank 8 will be released from the clamping and feeding device, so that the pre-set blank 8 can smoothly pass through the tube rolling unit 10 to complete rolling and compounding, forming a bimetallic composite pipe. In the above process, the pre-set blank 8 can always be set on the mandrel 6, that is, during the drilling, riveting and rolling process, the pre-set blank 8 moves along the mandrel 6.

[0036] As can be seen from the above, in the process of producing bimetallic composite pipes using the bimetallic composite pipe processing equipment provided by the present application, it is not necessary to weld the inner base pipe 8a and the outer coating pipe 8b, but the inner base pipe 8a and the outer coating pipe 8b are riveted and fixed to prevent the inner base pipe 8a and the outer coating pipe 8b from being dislocated from each other during the rolling and compounding process. Compared with the prior art in which the inner base pipe 8a and the outer coating pipe 8b are relatively fixed by welding, the process flow is simplified, the operation is convenient, and it can be applied to the pre-installation and fixation of the inner base pipe 8a and the outer coating pipe 8b that are difficult to weld or cannot be welded, so as to prevent mutual dislocation during the rolling and compounding process.

[0037] In the present application, the drilling device 3, the riveting device 2 and the tube rolling mill 10 are arranged in sequence, and the drilling device 3 and the riveting device 2 are located at the inlet side of the tube rolling mill 10, so as to drill, rivet and roll the pre-set blank 8 in sequence. Compared with the prior art in which the pre-set blank 8 is first manually welded separately and then transferred to the rolling mill 10 for rolling, the present application completes the riveting of the pre-set blank 8 online through the drilling device 3 and the riveting device 2, and then pushes it to the tube rolling mill 10 online directly through the clamping and feeding device. After being received by the tube rolling mill 10, it is automatically and gradually separated from the clamping and feeding device under the driving of the rolling force of the tube rolling mill 10, realizing the automatic connection of the previous and next processes, without the need for manual transfer operation, forming a pipeline processing, and improving the processing efficiency of the bimetallic composite pipe.

[0038] like Figure 2 As shown, in a specific embodiment, the number of the first slide rails 11 can be two, and the two first slide rails 11 are arranged in parallel. The two ends of the second slide rail 9 are respectively arranged on the two first slide rails 11, and the drilling device 3 and the riveting device 2 are both arranged on the second slide rail 9. In this way, the second slide rail 9 and the drilling device 3 and the riveting device 2 arranged on the second slide rail 9 can move together along the extension direction of the first slide rail 11. In addition, the drilling device 3 and the riveting device 2 can move along the extension direction of the second slide rail 9, so that the drilling device 3 and the riveting device 2 can slide along the extension direction of the first slide rail 11 and the extension direction of the second slide rail 9. In this way, the positions of the drilling device 3 and the riveting device 2 can be adjusted in two directions, which is conducive to quickly adjusting the drilling device 3 and the riveting device 2 to a suitable position.

[0039] Of course, only one first slide rail 11 may be provided, the second slide rail 9 may be provided on the first slide rail 11, the drilling device 3 and the riveting device 2 may be provided on the second slide rail 9, and the second slide rail 9 and the drilling device 3 and the riveting device 2 provided on the second slide rail 9 may be moved together along the extension direction of the first slide rail 11.

[0040] like Figure 3As shown, the first slide rail 11 may include a first screw guide rail 11a, and the sliding assembly also includes a first rotating drive member 12, and the first rotating drive member 12 can drive the first screw guide rail 11a to rotate. Specifically, the base of the second slide rail 9 can be threadedly matched with the first screw guide rail 11a, and while the first rotating drive member 12 drives the first screw guide rail 11a to rotate, the second slide rail 9 moves along the first screw guide rail 11a. With such a configuration, the structure is simple and easy to operate. It can be understood that when the number of the first slide rails 11 is two, one of the first slide rails 11 can be the first screw guide rail 11a, and the other first slide rail 11 can be the first slideway 11b, and the base of the second slide rail 9 can be slidably matched with the first slideway 11b. The first rotating drive member 12 can be specifically a motor, a rotary cylinder and other components.

[0041] In order to prevent the second slide rail 9 from moving too far along the first slide rail 11 and damaging other equipment, at least one blocking member 13 may be provided on the first screw guide rail 11a. The blocking member 13 may block the second slide rail 9 from continuing to move along the first slide rail 11. The number of blocking members 13 may be one, two, three, etc. Preferably, two blocking members 13 may be provided on the first screw guide rail 11a, and the second slide rail 9 slides between the two blocking members 13.

[0042] In the above embodiment, when there are two first slide rails 11 , the two first slide rails 11 may both be slideways, and the telescopic cylinder may be used to drive the second slide rail 9 to slide along the first slide rail 11 .

[0043] like Figure 4 As shown, the second slide rail 9 includes a second screw guide rail 9a, and the sliding assembly also includes a second rotating drive member 14, and the second rotating drive member 14 can drive the second screw guide rail 9a to rotate. Specifically, the connecting seat of the drilling device 3 and the connecting seat of the riveting device 2 can be threadedly matched with the second screw guide rail 9a, and the second rotating drive member 14 drives the second screw guide rail 9a to rotate while the drilling device 3 and the riveting device 2 move along the second screw guide rail 9a. Such a configuration has a simple structure and is easy to operate. Of course, the second slide rail 9 can also include a slideway, and the connecting seat of the drilling device 3 and the connecting seat of the riveting device 2 can slide along the slideway. The second rotating drive member 14 can be specifically a motor, a rotary cylinder and other components.

[0044] In the above technical solution, the drilling device 3 and the riveting device 2 are both arranged on the second screw guide rail 9a through a connecting seat, and the connecting seat includes an internal threaded hole that can cooperate with the second screw guide rail 9a. The drilling device 3 is fixedly connected to one connecting seat, and the riveting device 2 is fixedly connected to another connecting seat. Specifically, the drilling device 3 can be fixed to one connecting seat by bolts, welding, etc.; the riveting device 2 can be fixed to another connecting seat by bolts, welding, etc. After the internal threaded hole of the connecting seat is threadedly matched with the second screw guide rail 9a, the second screw guide rail 9a rotates, and the connecting seat moves along the length direction of the second screw guide rail 9a, and then the connecting seat drives the drilling device 3 or the riveting device 2 fixedly connected to the connecting seat to move.

[0045] The connection seat may include a plurality of parts distributed along the circumference of the internal threaded hole thereof, that is, the plurality of parts may be sequentially arranged along the circumference and assembled together to form the connection seat, and the number of parts may be two, three, four, etc. The plurality of parts may be able to move away from the second screw guide rail 9a to disengage the internal threaded hole of the connection seat from the second screw guide rail 9a, that is, the plurality of parts may move in a direction away from the second screw guide rail 9a to allow a gap to exist between the internal thread of the connection seat and the second screw guide rail 9a, so that the internal threaded hole of the connection seat is disengaged from the second screw guide rail 9a, and then when the second screw guide rail 9a rotates, the connection seat no longer moves along the length direction of the second screw guide rail 9a. Multiple split bodies can approach the second screw guide rail 9a so that the internal threaded hole of the connecting seat can be threadedly matched with the second screw guide rail 9a, that is, multiple split bodies can also move in the direction close to the second screw guide rail 9a so that the internal threaded hole of the connecting seat can be threadedly matched with the second screw guide rail 9a, and then when the second screw guide rail 9a rotates, the connecting seat moves along the length direction of the second screw guide rail 9a, and the connecting seat drives the drilling device 3 or the riveting device 2 fixed thereto to move.

[0046] Further, a first stopper 15a and a first position sensor 15b are provided near the first end of the second screw guide 9a, and the first stopper 15a is located on the side of the first position sensor 15b close to the first end of the second screw guide 9a. Specifically, the first end of the second screw guide 9a is provided close to the tube rolling mill 10, the first stopper 15a is located on the side of the second position sensor 15d close to the tube rolling mill 10, and the first stopper 15a and the first position sensor 15b are both provided close to the first end of the second screw guide 9a. A second stopper 15c and a second position sensor 15d are provided near the second end of the second screw guide 9a, and the second stopper 15c is located on the side of the second position sensor 15d close to the second end of the second screw guide 9a, that is, the second stopper 15c is located on the side of the second position sensor 15d away from the tube rolling mill 10. The first position sensor 15b is used to sense that the riveting device 2 passes through the position, and the second position sensor 15d is used to sense that the drilling device 3 passes through the position.

[0047] After the drilling device 3 moves along the second screw guide rail 9a to between the second position sensor 15d and the second stopper 15c, the internal threaded hole of the connecting seat of the drilling device 3 is disengaged from the second screw guide rail 9a. Specifically, when drilling is required, the clamping and feeding device drives the pre-assembled blank 8 to move to a suitable position, and then the second screw guide rail 9a rotates, and the drilling device 3 moves along the second screw guide rail 9a to the vicinity of the pre-assembled blank 8, and at this time, the multiple splits of the connecting seat of the riveting device 2 are disengaged from the second screw guide rail 9a, and the riveting device 2 does not move during the rotation of the second screw guide rail 9a, and the drilling device 3 drills holes on the pre-assembled blank 8. After the drilling is completed, the drilling device 3 moves along the second screw guide rail 9a in a direction away from the pipe rolling mill 10 until the drilling device 3 passes the second position sensor 15d. At this time, the multiple splits of the connecting seat of the drilling device 3 move in a direction away from the second screw guide rail 9a, so that there is a gap between the internal thread of the connecting seat of the drilling device 3 and the second screw guide rail 9a, so that the internal thread hole of the connecting seat of the drilling device 3 is disengaged from the second screw guide rail 9a. Then, the multiple splits of the connecting seat of the riveting device 2 move toward the direction close to the second screw guide rail 9a, the internal threaded hole of the connecting seat of the riveting device 2 is threadedly matched with the second screw guide rail 9a, the second screw guide rail 9a rotates, and the riveting device 2 moves to a suitable position along the second screw guide rail 9a. The riveting device 2 rivets at the drilled hole of the pre-set blank 8. After the riveting is completed, the riveting device 2 moves along the second screw guide rail 9a toward the direction close to the pipe rolling mill 10 until the riveting device 2 passes the first position sensor 15b. At this time, the multiple splits of the connecting seat of the riveting device 2 move toward the direction away from the second screw guide rail 9a, so that there is a gap between the internal thread of the connecting seat of the riveting device 2 and the second screw guide rail 9a, so that the internal threaded hole of the connecting seat of the riveting device 2 is disengaged from the second screw guide rail 9a. This cycle is repeated to achieve drilling and riveting of multiple pre-assembled blanks 8, which improves work efficiency. The connection seat of the drilling device 3 does not affect the movement of the riveting device 2 after it is disengaged from the second screw guide rail 9a, and the connection seat of the riveting device 2 does not affect the movement of the drilling device 3 after it is disengaged from the second screw guide rail 9a.

[0048] The first stopper 15a can stop the riveting device 2 from moving further, preventing the riveting device 2 from moving too far along the second screw guide rail 9a and damaging other equipment. The second stopper 15c can stop the drilling device 3 from moving further, preventing the drilling device 3 from moving too far along the second screw guide rail 9a and damaging other equipment.

[0049] In the above technical solution, the connecting seat also includes a split driving member capable of driving the split to approach or move away from the second screw guide rail 9a, and the split driving member includes a telescopic cylinder and / or a linear motor. Specifically, the telescopic cylinder and / or the linear motor drive the split to move to achieve the split approaching or moving away from the second screw guide rail 9a. An elastic reset member can also be arranged between the split and the second screw guide rail 9a, and the telescopic cylinder and / or the linear motor extend to drive the split to approach the second screw guide rail 9a until the internal threaded holes formed by the multiple splits are threadedly matched with the second screw guide rail 9a, and the elastic reset member drives the split to move away from the second screw guide rail 9a after the telescopic cylinder and / or the linear motor shrinks, and disengages from the second screw guide rail 9a. One split can be provided with a split driving member and an elastic reset member, or multiple splits can be provided with a split driving member and an elastic reset member.

[0050] like Figure 5 As shown, the drilling device 3 may include a third screw guide 16, a third rotating drive member 18 and a punch 17. Among them, the third rotating drive member 18 can drive the third screw guide 16 to rotate, the punch 17 is arranged on the third screw guide 16, and the base of the punch 17 is threadedly matched with the third screw guide 16. The extension direction of the third screw guide 16 is along the vertical direction, that is, the punch 17 can move along the extension direction of the third screw guide 16. Specifically, while the third rotating drive member 18 drives the third screw guide 16 to rotate, the punch 17 moves up and down along the third screw guide 16, thereby realizing drilling. The third rotating drive member 18 can be specifically a motor, a rotary cylinder and other components.

[0051] Furthermore, the drilling device 3 also includes a third limit member 19 arranged near the third screw guide rail 16, which can prevent the puncher 17 from continuing to rise along the third screw guide rail 16, thereby limiting the displacement of the puncher 17 to prevent the puncher 17 from colliding with other equipment and being damaged.

[0052] In the above embodiment, the punching machine 17 can be any punching machine 17 formed on the market. Of course, the punching machine 17 can also be driven to rise and fall by a telescopic cylinder, which is not limited here.

[0053] like Figure 6As shown, the riveting device 2 includes a fourth screw guide 20, a fourth rotating drive member 22 and a riveting gun 21. Among them, the fourth rotating drive member 22 can drive the fourth screw guide 20 to rotate, the riveting gun 21 is arranged on the fourth screw guide 20, and the base of the riveting gun 21 is threadedly matched with the fourth screw guide 20. The extension direction of the fourth screw guide 20 is along the vertical direction, that is, the riveting gun 21 can move along the extension direction of the fourth screw guide 20. Specifically, while the fourth rotating drive member 22 drives the fourth screw guide 20 to rotate, the riveting gun 21 moves up and down along the fourth screw guide 20, thereby realizing the riveting fixation of the inner base tube 8a and the outer covering tube 8b. The fourth rotating drive member 22 can be specifically a motor, a rotary cylinder and other components.

[0054] Furthermore, the riveting device 2 also includes a fourth limiter 23 arranged near the fourth screw guide rail 20, which can prevent the riveting gun 21 from continuing to rise along the fourth screw guide rail 20, thereby limiting the displacement of the riveting gun 21 to prevent the riveting gun 21 from colliding with other equipment and being damaged.

[0055] In the above embodiment, the riveting gun 21 can be a pneumatic riveting gun or an electric riveting gun, and the riveting gun 21 can be any riveting gun formed on the market. Of course, the riveting gun 21 can also be driven to rise and fall by a telescopic cylinder, which is not limited here.

[0056] like Figure 7 As shown, the clamping and feeding device includes a base 4, a mandrel trolley 5, a clamp 7 and a third slide rail 24, wherein the mandrel trolley 5 is arranged on the base 4, and the mandrel trolley 5 can be slidably arranged on the base 4 to adjust the position of the mandrel trolley 5. The mandrel trolley 5 can drive the mandrel 6 to move back and forth along the rolling axis, that is, the mandrel trolley 5 can drive the mandrel 6 to enter and exit the tube rolling mill 10. The mandrel 6, the clamp 7 and the tube rolling mill 10 should be coaxially arranged. The clamp 7 is arranged on the third slide rail 24, and the clamp 7 can move along the extension direction of the third slide rail 24 to approach or move away from the riveting device 2 and the drilling device 3. The clamp 7 can clamp the pre-set blank 8, and the clamp 7 can drive the pre-set blank 8 to move to the vicinity of the drilling device 3 for drilling while moving along the third slide rail 24, and then move to the vicinity of the riveting device 2 for riveting. The clamp 7 can also drive the pre-mounted blank 8 to rotate. After processing a hole, the clamp 7 drives the pre-mounted blank 8 to rotate by a preset angle, and the drilling device 3 drills the pre-mounted blank 8 again, and a plurality of holes are processed at the end of the pre-mounted blank 8 in this cycle. The extension direction of the third slide rail 24 can be along the horizontal direction. Specifically, the third slide rail 24 and the second slide rail 9 can be arranged parallel to each other.

[0057] In addition, after riveting is completed, the mandrel trolley 5 drives the mandrel 6 into the tube rolling unit 10, and the clamp 7 drives the pre-set blank 8 into the tube rolling unit 10; after rolling is completed, the mandrel trolley 5 and the clamp 7 return to their original positions.

[0058] The third slide rail 24 may include a fifth screw guide rail and a fifth rotation drive member, the base of the clamp 7 is threadedly matched with the fifth screw guide rail, and the fifth rotation drive member drives the fifth screw guide rail to rotate while the clamp 7 moves along the fifth screw guide rail. Alternatively, the third slide rail 24 may also include a slide groove or a raised slideway, and the clamp 7 is driven to move along the third slide rail 24 by a telescopic cylinder. The fifth rotation drive member may be specifically a motor, a rotary cylinder, and other components.

[0059] In the above embodiment, the clamp 7 can be specifically a three-jaw chuck.

[0060] In addition, the present application also provides a method for processing a bimetallic composite pipe, comprising the steps of: S1: The inner base tube 8a and the outer covering tube 8b are sheathed to form a pre-sheathed blank 8; Specifically, an inner base tube 8a and an outer cladding tube 8b are provided, and the inner base tube 8a is sleeved inside the outer cladding tube 8b to form a pre-sheathed blank 8. The material of the inner base tube 8a can be selected according to actual needs, such as aluminum tube, copper tube, titanium tube, steel tube, etc.; the material of the outer cladding tube 8b can also be selected according to actual needs, such as titanium tube, steel tube, magnesium tube, copper tube, aluminum tube, etc. The materials of the inner base tube 8a and the outer cladding tube 8b are different.

[0061] In a specific example, the outer tube 8b can be a TA2 titanium tube with an outer diameter of 76 mm, a thickness of 3 mm, and a length of 200 mm. The inner base tube 8a is a 6063Al aluminum tube with an outer diameter of 70 mm, a thickness of 7.5 mm, and a length of 200 mm.

[0062] S2: using the clamping and feeding device to clamp the pre-mounted blank 8, and driving the pre-mounted blank 8 to move to the vicinity of the drilling device 3 and the riveting device 2; In this step, the pre-set blank 8 is fixed on the clamping and feeding device, which can drive the pre-set blank 8 to move near the drilling device 3 for subsequent drilling. The clamping and feeding device can also drive the pre-set blank 8 to move near the riveting device 2 for subsequent riveting.

[0063] When the clamping and feeding device includes a base 4, a core rod trolley 5, a clamp 7 and a third slide rail 24, the clamp 7 is used to clamp the pre-mounted blank 8, and the clamp 7 drives the pre-mounted blank 8 along the third slide rail 24 to drive the pre-mounted blank 8 to move to the vicinity of the drilling device 3 and the riveting device 2.

[0064] S3: using the drilling device 3 to open at least one drill hole at the end of the pre-set blank 8; After the clamping and feeding device drives the pre-set blank 8 to move to the vicinity of the drilling device 3, the drilling device 3 is moved to a suitable position along the first slide rail 11 and the second slide rail 9, and at least one drill hole is opened at the end of the pre-set blank 8 by the drilling device 3. It can be understood that after the drilling device 3 opens a drill hole at the end of the pre-set blank 8, the clamp 7 drives the pre-set blank 8 to rotate by a preset angle, and the drilling device 3 drills the pre-set blank 8 again, and multiple drill holes are drilled at the end of the pre-set blank 8 in this cycle.

[0065] Exemplarily, when two holes are opened at the end of the pre-mounted blank 8 by using the drilling device 3, after one hole is opened at the end of the pre-mounted blank 8 by using the drilling device 3, the clamp 7 drives the pre-mounted blank 8 to rotate 180°, and the drilling device 3 drills the pre-mounted blank 8 again; when three holes are opened at the end of the pre-mounted blank 8 by using the drilling device 3, after one hole is opened at the end of the pre-mounted blank 8 by using the drilling device 3, the clamp 7 drives the pre-mounted blank 8 to rotate 120°, the drilling device 3 drills the second hole in the pre-mounted blank 8, and then the clamp 7 drives the pre-mounted blank 8 to rotate 120° again, and the drilling device 3 drills the third hole in the pre-mounted blank 8.

[0066] S4: using the riveting device 2 to perform riveting at the drilled holes on the pre-set blank 8; After the clamping and feeding device drives the pre-set blank 8 to move to the vicinity of the riveting device 2, the riveting device 2 is moved to a suitable position along the first slide rail 11 and the second slide rail 9, and the riveting device 2 is used to rivet at the drilled hole of the pre-set blank 8 to fix the inner base tube 8a and the outer sheath tube 8b together. It can be understood that when there are multiple drilled holes at the end of the pre-set blank 8, after riveting at the first drilled hole, the clamp 7 drives the pre-set blank 8 to rotate by a preset angle, and the riveting device 2 rivets the next drilled hole, and the riveting is performed at multiple drilled holes at the end of the pre-set blank 8 in this cycle.

[0067] For example, when two holes are drilled at the end of the pre-mounted blank 8, after the riveting device 2 is used to rivet at one of the drilled holes of the pre-mounted blank 8, the clamp 7 drives the pre-mounted blank 8 to rotate 180°, and the riveting device 2 rivets at the next drilled hole again; when three holes are drilled at the end of the pre-mounted blank 8, after the riveting device 2 is used to rivet at one of the drilled holes of the pre-mounted blank 8, the clamp 7 drives the pre-mounted blank 8 to rotate 120°, the riveting device 2 rivets the second drilled hole of the pre-mounted blank 8, and then the clamp 7 drives the pre-mounted blank 8 to rotate 120° again, and the riveting device 2 rivets the third drilled hole of the pre-mounted blank 8.

[0068] S5: The pre-clad blank 8 and the mandrel 6 are transferred to the tube rolling mill 10 by means of a clamping and feeding device to roll the pre-clad blank 8 into a bimetallic composite tube.

[0069] Specifically, after riveting, the inner base tube 8a and the outer covering tube 8b are relatively fixed, and then the pre-sheathed blank 8 and the mandrel 6 are transferred to the tube rolling unit 10 by a clamping and feeding device for rolling to form the pre-sheathed blank 8 into a bimetallic composite tube.

[0070] When the clamping and feeding device includes the base 4, the mandrel trolley 5, the clamp 7 and the third slide rail 24, the mandrel trolley 5 is used to transfer the mandrel to the tube rolling unit 10, and the clamp 7 is used to transfer the pre-sheathed blank 8 to the tube rolling unit 10.

[0071] Compared with the prior art, the beneficial effects of the method for processing a bimetallic composite pipe provided in the present application are the same as the beneficial effects of the above-mentioned bimetallic composite pipe processing equipment, which will not be described in detail here.

[0072] In another embodiment, after the inner base tube 8a and the outer tube 8b are set to form the pre-set blank 8 in step S1, before the pre-set blank 8 is clamped by the clamping and feeding device in step S2, step S1' is also included: the two ends of the pre-set blank 8 are sealed with high temperature resistant flame retardant glue, and the pre-set blank 8 is placed in a vacuum heating furnace for heating and insulation within a preset temperature range. Specifically, after the two ends of the pre-set blank 8 are sealed with high temperature resistant flame retardant glue, the pre-set blank 8 is placed in a vacuum heating furnace for heating and insulation. For the materials of the inner base tube 8a and the outer tube 8b, the temperature in the vacuum heating furnace can be adaptively adjusted. For example, when the inner base tube 8a is a titanium tube and the outer tube 8b is an aluminum tube, the temperature in the vacuum heating furnace is 400℃-550℃, and the insulation time is 20min-40min.

[0073] In addition, before the inner base tube 8a and the outer covering tube 8b are sheathed to form the pre-sheathed blank 8 in step S1, step S0 is also included: grinding the outer surface of the inner base tube 8a and the inner surface of the outer covering tube 8b, so as to remove impurities such as oxides on the outer surface of the inner base tube 8a and the inner surface of the outer covering tube 8b, so as to make the outer surface of the inner base tube 8a and the inner surface of the outer covering tube 8b cleaner.

[0074] In another embodiment, after the pre-assembled blank 8 and the mandrel 6 are transferred to the tube rolling mill 10 by the clamping and feeding device in step S5, and rolled to form the pre-assembled blank 8 into a bimetallic composite tube, step S5' is further included; the bimetallic composite tube is sheared and cut to obtain a bimetallic composite tube of a preset length.

[0075] Specifically, the drilling device 3 and the riveting device 2 are both arranged on the second screw guide rail 9a through a connecting seat, and the connecting seat includes an internal threaded hole that can cooperate with the second screw guide rail 9a. The connecting seat can include a plurality of split bodies distributed along the circumference of its internal threaded hole, the plurality of split bodies can be away from the second screw guide rail 9a so that the internal threaded hole of the connecting seat is disengaged from the second screw guide rail 9a, the plurality of split bodies can be close to the second screw guide rail 9a so that the internal threaded hole of the connecting seat is threadedly matched with the second screw guide rail 9a, and a first stopper 15a and a first position sensor 15b are arranged near the first end of the second screw guide rail 9a, and a second stopper 15c and a second position sensor 15d are arranged near the second end of the second screw guide rail 9a.

[0076] In the above technical solution, S3: using the drilling device 3 to open at least one bore hole at the end of the pre-mounted blank 8, specifically including: after the clamping and feeding device drives the pre-mounted blank 8 to move to a suitable position, the second screw guide rail 9a rotates, and the drilling device 3 moves along the second screw guide rail 9a to the vicinity of the pre-mounted blank 8, and the drilling device 3 opens at least one bore hole on the pre-mounted blank 8. After the drilling is completed, the drilling device 3 moves along the second screw guide rail 9a in a direction away from the pipe rolling unit 10 until the drilling device 3 passes the second position sensor 15d, and the internal threaded hole of the connecting seat of the drilling device 3 is disengaged from the second screw guide rail 9a.

[0077] S4: The riveting device 2 is used to perform riveting at the drilled hole on the pre-assembled blank 8, which specifically includes rotating the second screw guide rail 9a, moving the riveting device 2 along the second screw guide rail 9a to the vicinity of the pre-assembled blank 8, and performing riveting at the drilled hole of the pre-assembled blank 8. After the riveting is completed, the riveting device 2 moves along the second screw guide rail 9a in a direction away from the tube rolling unit 10 until the riveting device 2 passes the first position sensor 15b, and the internal threaded hole of the connecting seat of the riveting device 2 is disengaged from the second screw guide rail 9a.

[0078] In step S3, ensure that the internal threaded hole of the connection seat of the riveting device 2 is disengaged from the second screw guide rail 9a, and in step S4, ensure that the internal threaded hole of the connection seat of the drilling device 3 is disengaged from the second screw guide rail 9a.

[0079] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A bimetallic composite pipe processing equipment, characterized in that: include: Support table; A sliding assembly is arranged on the support platform, the sliding assembly comprises a first sliding rail and a second sliding rail, and an extension direction of the first sliding rail intersects with an extension direction of the second sliding rail; A drilling device disposed on the sliding assembly, the drilling device being able to slide along the extension direction of the first slide rail and the extension direction of the second slide rail, and the drilling device being used to drill holes in the pre-set blank; A riveting device disposed on the sliding assembly, the riveting device being able to slide along the extension direction of the first slide rail and the extension direction of the second slide rail, the riveting device being used to rivet the inner base tube and the outer covering tube of the pre-sheathed blank; A clamping and feeding device, used for clamping the pre-mounted blank and driving the pre-mounted blank to move and rotate; A tube rolling mill set is arranged on the support platform, and the tube rolling mill set is used for rolling the pre-set blank to form a bimetallic composite tube.

2. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The number of the first slide rails is two, and both ends of the second slide rail are respectively arranged on the two first slide rails; The drilling device and the riveting device are both arranged on the second slide rail.

3. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The first slide rail includes a first screw guide rail, and the sliding assembly also includes a first rotation driving member capable of driving the first screw guide rail to rotate; The second slide rail includes a second screw guide rail, and the sliding assembly also includes a second rotation driving member capable of driving the second screw guide rail to rotate.

4. The bimetallic composite pipe processing equipment according to claim 3, characterized in that: The drilling device and the riveting device are both arranged on the second screw guide rail through a connecting seat, the connecting seat includes an internal threaded hole that can cooperate with the second screw guide rail, and the connecting seat includes a plurality of split bodies distributed along the circumference of its internal threaded hole, and the plurality of split bodies can be away from the second screw guide rail to disengage the internal threaded hole of the connecting seat from the second screw guide rail, and the plurality of split bodies can be close to the second screw guide rail to make the internal threaded hole of the connecting seat threadably cooperate with the second screw guide rail.

5. The bimetallic composite pipe processing equipment according to claim 4, characterized in that: A first stopper and a first position sensor are disposed near the first end of the second screw guide rail, and the first stopper is located on a side of the first position sensor close to the first end of the second screw guide rail; a second stopper and a second position sensor are disposed near the second end of the second screw guide rail, and the second stopper is located on a side of the second position sensor close to the second end of the second screw guide rail; After the riveting device moves along the second screw guide rail to between the first position sensor and the first limit piece, the internal threaded hole of the connecting seat of the riveting device disengages from the second screw guide rail; after the drilling device moves along the second screw guide rail to between the second position sensor and the second limit piece, the internal threaded hole of the connecting seat of the drilling device disengages from the second screw guide rail.

6. The bimetallic composite pipe processing equipment according to claim 5, characterized in that: The connecting seat also includes a split driving member capable of driving the split body to approach or move away from the second screw guide rail; The split driving component includes a telescopic cylinder and / or a linear motor.

7. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The drilling device includes a third screw guide, a third rotating drive member capable of driving the third screw guide to rotate, and a puncher arranged on the third screw guide, the extension direction of the third screw guide is along the vertical direction, and the drilling device also includes a third limiter arranged near the third screw guide; the riveting device includes a fourth screw guide, a fourth rotating drive member capable of driving the fourth screw guide to rotate, and a riveting gun arranged on the fourth screw guide, the extension direction of the fourth screw guide is along the vertical direction, and the riveting device also includes a fourth limiter arranged near the fourth screw guide.

8. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The clamping and feeding device includes a base, a core rod trolley arranged on the base, and a third slide rail arranged on the base. The clamping and feeding device also includes a clamp arranged on the third slide rail. The clamp can move along the extension direction of the third slide rail to approach or move away from the riveting device and the drilling device. The clamp can also drive the pre-assembled blank to rotate.

9. A method for processing a bimetallic composite pipe, characterized in that: The bimetallic composite pipe processing equipment according to any one of claims 1 to 8 comprises the following steps: The inner base tube and the outer covering tube are nested to form a pre-nested blank; The pre-mounted blank is clamped by the clamping and feeding device, and the pre-mounted blank is driven to move to the vicinity of the drilling device and the riveting device; Using the drilling device to open at least one drill hole at the end of the pre-set blank; Using the riveting device to perform riveting at the drilled holes on the pre-set blank; The pre-clad blank and the mandrel are transferred to the tube rolling mill by the clamping and feeding device for rolling, so that the pre-clad blank is formed into a bimetallic composite tube.

10. The method for processing a bimetallic composite pipe according to claim 9, characterized in that: After the inner base tube and the outer covering tube are sheathed to form a pre-sheathed blank, and before the pre-sheathed blank is clamped by the clamping and feeding device, the method further includes the following steps: The two ends of the pre-mounted blank are sealed with high temperature resistant flame retardant adhesive, and the pre-mounted blank is placed in a vacuum heating furnace for heat preservation within a preset temperature range; And / or, before the inner base tube and the outer covering tube are sheathed to form the pre-sheathed blank, the step of: grinding the outer surface of the inner base tube and the inner surface of the outer covering tube; And / or, after the pre-assembled blank and the mandrel are transferred to the tube rolling mill for rolling by the clamping and feeding device so that the pre-assembled blank forms a bimetallic composite tube, the method further comprises the step of shearing and cutting the bimetallic composite tube.

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