Bimetal composite pipe machining equipment and bimetal composite pipe machining method

Abstract

The invention discloses bimetal composite pipe machining equipment and a bimetal composite pipe machining method. The bimetal composite pipe machining equipment comprises a supporting frame, a clamping device, a spinning device, a pushing device and a pipe rolling unit. The clamping device can clamp the pre-sleeved blank and drive the pre-sleeved blank to rotate; the spinning device comprises a spinning driving part and at least one spinning wheel, and the spinning driving part can drive the spinning wheels to move in the radial direction and the axial direction of the pre-sleeving blank; the pushing device is arranged on the side, away from the spinning device, of the clamping device and comprises a pushing part and a pushing driving part, the pushing part can abut against the end of the pre-sleeving blank, the pushing driving part can drive the pushing part to move in the axial direction of the pre-sleeving blank, and the pushing part can penetrate through the through hole of the clamping device; and the pipe rolling unit is used for rolling the pre-sleeved blank to form the bimetal composite pipe. The problem that an inner base pipe and an outer coating pipe which cannot be welded are staggered in the rolling and compounding process is solved, and meanwhile production efficiency is improved.

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 bimetallic composite pipe processing method. 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 bimetallic composite pipe processing method to solve the problem of misalignment between the inner base pipe and the outer cladding pipe that are difficult to weld or cannot be welded during the rolling and cladding process, and the problem of low production efficiency caused by the need to manually transfer the pre-packaged blank to the pipe rolling unit during the connection between the previous and subsequent processes.

[0006] In order to achieve the above objectives, this application provides the following technical solutions: A bimetallic composite pipe processing equipment, comprising: Support frame; A clamping device disposed on the support frame, the clamping device can clamp the pre-mounted blank and drive the pre-mounted blank to rotate; A spinning device is arranged on the support frame, the spinning device comprises a spinning drive member and at least one spinning wheel, the spinning drive member can drive the spinning wheel to move along the radial direction and axial direction of the pre-set blank; A material pushing device, the material pushing device is arranged on a side of the clamping device away from the spinning device, the material pushing device comprises a pushing member and a pushing driving member, the pushing member can abut against the end of the pre-set blank, and the pushing driving member can drive the pushing member to move along the axial direction of the pre-set blank, and the pushing member can pass through the through hole of the clamping device; The tube rolling mill set is arranged on the support frame, 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 clamping device includes a base, a plurality of claws distributed along the circumferential direction, and a claw driving member, wherein the claw is movably disposed in a mounting hole of the base, and the claw driving member is disposed inside the base, and the claw driving member can drive the claw to move radially along the pre-mounted blank to clamp or release the pre-mounted blank.

[0008] In one implementation, the push drive member includes a telescopic cylinder, a linear motor and / or an electromagnetic drive member; and / or the push member includes a push cylinder and / or a push rod.

[0009] In one implementation, the spinning drive member includes a radial drive member and an axial drive member. The radial drive member can drive the spinning wheel to move radially along the pre-set blank, and the axial drive member can drive the radial drive member and the spinning wheel to move axially along the pre-set blank.

[0010] In one implementation, the axial drive member includes a telescopic cylinder, a linear motor and / or an electromagnetic drive member; the radial drive member includes a telescopic cylinder, a linear motor and / or an electromagnetic drive member.

[0011] In one implementation, the spinning device includes three spinning wheels, and the three spinning wheels are evenly distributed along the circumference of the pre-set blank.

[0012] When the bimetallic composite pipe processing equipment provided by the present application is used, the pre-set blank is first clamped on the clamping device, and the pre-set blank is clamped by the clamping device, and then the spinning drive drives the spinning wheel to move along the radial direction of the pre-set blank toward the pre-set blank until the spinning wheel contacts one end of the pre-set blank. Figure 2As shown, the clamping device then drives the pre-set blank to rotate around its own axis, and at the same time, the spinning drive drives the spinning wheel to move along the axial direction of the pre-set blank. The spinning wheel spins at the end of the pre-set blank to form a spinning concave composite part, that is, the inner base tube and the outer covering tube are composited together at the spinning position. After spinning is completed, the clamping device releases the pre-set blank, as shown in FIG. Figure 3 As shown, the pusher of the pusher device abuts against the end of the pre-sheathed blank away from the tube rolling unit, and the pusher driving member drives the pusher to move along the axial direction of the pre-sheathed blank, thereby pushing the pre-sheathed blank to move along its axial direction, so that the pre-sheathed blank enters the tube rolling unit, and the pre-sheathed blank is rolled into a bimetallic composite tube by the tube rolling unit. In the above process, the pre-sheathed blank can always be sheathed on the mandrel, that is, during the clamping, spinning and rolling process, the pre-sheathed blank moves along the axis of the mandrel.

[0013] Among them, Figure 2 As shown, the pre-sheathed blank is recessed in the direction close to the center line at the spinning recessed composite portion, and at this spinning position, the inner base tube and the outer cladding tube have been composited together. The inner base tube and the outer cladding tube are relatively fixed and firmly combined at the spinning position, which can prevent the inner base tube and the outer cladding tube from relative rotation and movement, thereby preventing the inner base tube and the outer cladding tube from being misaligned with each other during the rolling composite process.

[0014] It can be seen from the above that 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 covering pipe, but the ends of the inner base pipe and the outer covering pipe are spun and compounded to prevent the inner base pipe and the outer covering pipe from being misaligned with each other during the rolling and compounding process. Compared with the prior art in which the inner base pipe and the outer covering pipe 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 and the outer covering pipe that are difficult to weld or cannot be welded, so as to prevent them from being misaligned with each other during the rolling and compounding process. In addition, the spinning device first spins and compounds the ends of the inner base pipe and the outer covering pipe, which overcomes the problem that the pre-set blank cannot be deformed synergistically during the biting of the oblique rolling rollers of the bimetallic composite pipe, resulting in the inability to combine.

[0015] In the present application, the pusher device, the clamping device, the spinning device and the tube rolling unit are arranged in sequence, so as to spin and roll the pre-set blank in sequence. Compared with the existing method of first manually welding the pre-set blank separately and then transferring it to the rolling unit for rolling, the present application completes the spinning and compounding of the pre-set blank online through the spinning device, and then pushes it to the tube rolling unit online directly through the pusher device. After being received by the tube rolling unit, it is automatically and gradually separated from the spinning 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 operation, forming assembly line processing, and improving the processing efficiency of the bimetallic composite pipe.

[0016] A method for processing a bimetallic composite pipe, using the bimetallic composite pipe processing equipment as described in any one of the above, comprises the following steps: Sheathing the inner base tube and the outer cladding tube to form a pre-sheathed blank, and passing the mandrel through the pre-sheathed blank; Clamping the pre-set blank using a clamping device; The spinning drive of the spinning device drives the spinning wheel to move to the end of the pre-sheathed blank close to the tube rolling unit for pressing the pre-sheathed blank. While the clamping device drives the pre-sheathed blank to rotate, the spinning drive drives the spinning wheel to move along the axial direction of the pre-sheathed blank, so that a spinning concave composite part is formed at the end of the pre-sheathed blank; The pre-sheathed blank is pushed into the tube rolling unit by a pushing device, and the pre-sheathed blank is rolled to form a bimetallic composite tube.

[0017] In one implementation, while the clamping device drives the pre-mounted blank to rotate, the spinning drive drives the spinning wheel to move 10 mm-30 mm along the axial direction of the pre-mounted blank.

[0018] 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 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.

[0019] 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-sheathed blank is pushed into the tube rolling unit by the pushing device and rolled to form the pre-sheathed blank into a bimetallic composite tube, the method further comprises the step of shearing and cutting the bimetallic composite tube.

[0020] 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

[0021] 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 A schematic diagram of a bimetallic composite tube processing device for spinning provided in an embodiment of the present application; Figure 2 A cross-sectional view of a bimetallic composite pipe processing device provided in an embodiment of the present application performing spinning; Figure 3 A schematic diagram of rolling of a bimetallic composite pipe processing equipment provided in an embodiment of the present application.

[0022] Reference numerals: 1-push device, 1a-push cylinder, 2-base, 3-claw, 4-pre-set blank, 4a-spinning concave composite part, 5-spinning wheel, 6-oblique rolling roller, 7-core rod. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] See also Figure 1-Figure 3The bimetallic composite pipe processing equipment provided in the embodiment of the present application includes a support frame, a clamping device, a spinning device, a pushing device 1 and a pipe rolling unit.

[0029] The clamping device is arranged on the support frame. Specifically, the base of the clamping device can be fixed on the support frame, or the clamping device can be slidably arranged on the support frame, and the clamping device is fixed on the support frame after sliding to a suitable position. The clamping device can clamp the pre-set blank 4 and drive the pre-set blank 4 to rotate. The pre-set blank 4 includes an inner base tube and an outer covering tube that are set together. That is, the clamping device can clamp the pre-set blank 4, and after the clamping device clamps the pre-set blank 4, it can drive the pre-set blank 4 to rotate.

[0030] The spinning device is arranged on the support frame. The spinning device includes a spinning drive and at least one spinning wheel 5, and the spinning drive can drive the spinning wheel 5 to move along the radial and axial directions of the pre-mounted blank 4. Specifically, after the clamping device clamps the pre-mounted blank 4, the spinning drive drives the spinning wheel 5 to move along the radial direction of the pre-mounted blank 4 toward the pre-mounted blank 4 until the spinning wheel 5 contacts one end of the pre-mounted blank 4, and then the clamping device drives the pre-mounted blank 4 to rotate around its own axis, and at the same time, the spinning drive drives the spinning wheel 5 to move along the axial direction of the pre-mounted blank 4, and the spinning wheel 5 spins at the end of the pre-mounted blank 4 to form a spinning concave composite part 4a, and at the spinning position, the inner base tube and the outer covering tube are compounded together.

[0031] The pushing device 1 is also arranged on the support frame, and the pushing device 1 is arranged on the side of the clamping device away from the spinning device, that is, the pushing device 1, the clamping device, the spinning device and the tube rolling unit are arranged in sequence. The pushing device 1 includes a pushing member and a pushing driving member. The pushing member can abut against the end of the pre-sheathed blank 4. Specifically, the pushing member can abut against the end of the pre-sheathed blank 4 away from the tube rolling unit. The pushing driving member can drive the pushing member to move along the axial direction of the pre-sheathed blank 4, thereby pushing the pre-sheathed blank 4 to move along its axial direction. It can be understood that in the process of the pushing driving member driving the pushing member and the pre-sheathed blank 4 to move, the clamping device is in a non-clamped state. At this time, the pre-sheathed blank 4 can move in the through hole of the clamping device, and the pushing member can also pass through the through hole of the clamping device.

[0032] The tube rolling mill set is arranged on the support frame, and is used for rolling the pre-set blank 4 to form the bimetallic composite tube. The tube rolling mill set can be a skew roller 6.

[0033] When the bimetallic composite pipe processing equipment provided by the present application is used, the pre-set blank 4 is first clamped on the clamping device, and the pre-set blank 4 is clamped by the clamping device, and then the spinning drive member drives the spinning wheel 5 to move along the radial direction of the pre-set blank 4 toward the pre-set blank 4 until the spinning wheel 5 contacts one end of the pre-set blank 4. Figure 2As shown, the clamping device then drives the pre-set blank 4 to rotate around its own axis, and at the same time, the spinning drive drives the spinning wheel 5 to move along the axial direction of the pre-set blank 4. The spinning wheel 5 spins at the end of the pre-set blank 4 to form a spinning concave composite part 4a, so that the inner base tube and the outer cover tube are composited together at the spinning position. After spinning is completed, the clamping device releases the pre-set blank 4, as shown in FIG. Figure 3 As shown, the pusher of the pusher device 1 abuts against the end of the pre-sheathed blank 4 away from the tube rolling unit, and the pusher driving member drives the pusher to move along the axial direction of the pre-sheathed blank 4, thereby pushing the pre-sheathed blank 4 to move along its axial direction, so that the pre-sheathed blank 4 enters the tube rolling unit, and the pre-sheathed blank 4 is rolled into a bimetallic composite tube by the tube rolling unit. In the above process, the pre-sheathed blank 4 can always be sheathed on the mandrel 7, that is, during the clamping, spinning and rolling process, the pre-sheathed blank 4 moves along the axis of the mandrel 7.

[0034] Among them, Figure 2 As shown, the pre-sheathed blank 4 is recessed in the direction close to the center line at the spinning recessed composite portion 4a, and at this spinning position, the inner base tube and the outer cladding tube have been composited together, and the inner base tube and the outer cladding tube are relatively fixed and firmly combined at the spinning position, which can prevent the inner base tube and the outer cladding tube from relative rotation and movement, and further prevent the inner base tube and the outer cladding tube from being misaligned with each other during the rolling composite process.

[0035] 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 covering pipe, but the ends of the inner base pipe and the outer covering pipe are spun and compounded to prevent the inner base pipe and the outer covering pipe from being misaligned with each other during the rolling and compounding process. Compared with the prior art in which the inner base pipe and the outer covering pipe 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 and the outer covering pipe that are difficult to weld or cannot be welded, so as to prevent them from being misaligned with each other during the rolling and compounding process. In addition, the spinning device first spins and compounds the spun ends of the inner base pipe and the outer covering pipe, which overcomes the problem that the pre-set blank 4 cannot be deformed in coordination during the biting of the oblique rolling rollers of the bimetallic composite pipe, resulting in the inability to combine.

[0036] In the present application, the pusher device 1, the clamping device, the spinning device and the tube rolling unit are arranged in sequence, so as to sequentially spin and roll the pre-set blank 4. Compared with the prior art, the pre-set blank 4 is first manually welded separately and then transferred to the rolling unit for rolling, the present application completes the spinning and compounding of the pre-set blank online through the spinning device, and then pushes it to the tube rolling unit online directly through the pusher device 1. After being received by the tube rolling unit, it is automatically and gradually separated from the spinning 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 operation, forming a pipeline processing, and improving the processing efficiency of the bimetallic composite pipe.

[0037] like Figure 1As shown, in a specific embodiment, the clamping device includes a base 2, a plurality of claws 3 distributed along the circumferential direction, and a claw 3 driving member, and the claw 3 is movably arranged in the mounting hole of the base 2. Specifically, the base 2 can be a cylindrical base, a cubic base, etc., and the base 2 is provided with a plurality of mounting holes along the circumference of the pre-set blank 4. The claw 3 is arranged in the mounting hole, and the claw 3 is movable in the mounting hole, and the plurality of claws 3 move to clamp the pre-set blank 4 together or release the pre-set blank 4. A slide groove can be arranged in the mounting hole, and the claw 3 has a protrusion that moves along the slide groove. The claw 3 driving member is arranged inside the base 2, and the claw 3 driving member can drive the claw 3 to move along the radial direction of the pre-set blank 4 to clamp or release the pre-set blank 4. That is, the claw 3 driving member can drive the claw 3 to move in the mounting hole during the extension and retraction process, so that the plurality of claws 3 clamp the pre-set blank 4 together or release the pre-set blank 4. The driving element of the clamping claw 3 can be specifically a telescopic cylinder, a linear motor and / or an electromagnetic driving element.

[0038] In the above technical solution, a spring return member may be further provided in the base 2, and the driving member of the clamping jaw 3 extends to drive the clamping jaw 3 to move toward the pre-set blank 4, and the multiple clamping jaws 3 clamp the pre-set blank 4 together. After the driving member of the clamping jaw 3 contracts, the clamping jaw 3 moves away from the pre-set blank 4 under the action of the spring return member, and the multiple clamping jaws 3 release the pre-set blank 4. The clamping device should have a through hole, and the pre-set blank 4 passes through the through hole so that the multiple clamping jaws 3 clamp the pre-set blank 4.

[0039] In addition, the clamping device further comprises a rotating driving member for driving the base 2 to rotate, and the rotating driving member can drive the base 2, the plurality of clamping claws 3 and the pre-mounted blank 4 to rotate together.

[0040] In other embodiments, the push drive may include a telescopic cylinder, a linear motor and / or an electromagnetic drive, and the push drive extends to drive the push member and the pre-sheathed blank 4 to move along the mandrel 7 toward the tube rolling unit until the pre-sheathed blank 4 enters the tube rolling unit to form a bimetallic composite tube. During the pushing process, the push member may pass through the through hole of the clamping device to allow the pre-sheathed blank 4 to enter the tube rolling unit.

[0041] The pushing member may include a push cylinder 1 a and / or a push rod. In the case where the pushing member is a push rod, there may be a plurality of push rods, which are arranged along the circumference of the pre-mounted blank 4 .

[0042] In some embodiments, the spinning drive member includes a radial drive member and an axial drive member. The radial drive member can drive the spinning wheel 5 to move radially along the pre-set blank 4. Specifically, a radial drive member can be provided corresponding to each spinning wheel 5. The radial drive member drives the spinning wheel 5 to move radially along the pre-set blank 4 to contact with the outer surface of the pre-set blank 4 for spinning. After spinning, the radial drive member drives the spinning wheel 5 away from the outer surface of the pre-set blank 4. The axial drive member can drive the radial drive member and the spinning wheel 5 to move axially along the pre-set blank 4. Specifically, during the process of the spinning wheel 5 spinning the pre-set blank 4, the output end of the axial drive member can drive the radial drive member and the spinning wheel 5 to move axially along the pre-set blank 4, so that the spinning concave composite part 4a has a certain extension distance along the axial direction of the pre-set blank 4, ensuring that the inner base tube and the outer covering tube are relatively fixed and more firmly.

[0043] Furthermore, during the spinning process, the output end of the axial driving member drives the radial driving member and the spinning wheel 5 to move 10 mm to 30 mm along the axial direction of the pre-mounted blank 4, and illustratively moves 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm or 30 mm along the axial direction of the pre-mounted blank 4. In this way, the axial extension distance of the spinning concave composite part 4a along the pre-mounted blank 4 is reasonable, which will not be too short to cause the inner base tube and the outer covering tube to be not firmly combined, nor too long to reduce the production efficiency.

[0044] In the above technical solution, the axial drive member may include a telescopic cylinder, a linear motor and / or an electromagnetic drive member; the radial drive member may include a telescopic cylinder, a linear motor and / or an electromagnetic drive member. Such an arrangement has a simple structure and is easy to manufacture.

[0045] like Figure 1 and Figure 3 As shown, the spinning device includes three spinning wheels 5, and the three spinning wheels 5 are evenly distributed along the circumference of the pre-set blank 4. That is, the central angle corresponding to two adjacent spinning wheels 5 is 120°. Of course, the number of spinning wheels 5 can also be two, four, etc., which is not limited here.

[0046] In addition, the present application also provides a method for processing a bimetallic composite pipe, comprising the steps of: S1: The inner base tube and the outer covering tube are sheathed to form a pre-sheathed blank 4, and the mandrel 7 is passed through the pre-sheathed blank 4; Specifically, an inner base tube and an outer cladding tube are provided, and the inner base tube is sleeved inside the outer cladding tube to form a pre-sheathed blank 4, and the formed pre-sheathed blank 4 is sleeved on the mandrel 7. The material of the inner base tube 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 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 and the outer cladding tube are different.

[0047] In a specific example, the outer tube 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 is a 6063Al aluminum tube with an outer diameter of 70 mm, a thickness of 7.5 mm, and a length of 200 mm.

[0048] S2: Clamp the pre-set blank 4 using a clamping device; In this step, the pre-mounted blank 4 is fixed on the clamping device, and the clamping device can drive the pre-mounted blank 4 to rotate.

[0049] S3: The spinning drive of the spinning device drives the spinning wheel 5 to move to the end of the pre-sheathed blank 4 close to the tube rolling unit, and the clamping device drives the pre-sheathed blank 4 to rotate, while the spinning drive drives the spinning wheel 5 to move axially along the pre-sheathed blank 4, so that the end of the pre-sheathed blank 4 forms a spinning concave composite part 4a; In this step, the spinning drive drives the spinning wheel 5 to move along the radial direction of the pre-sheathed blank 4 toward the pre-sheathed blank 4 until the spinning wheel 5 contacts one end of the pre-sheathed blank 4, and then the clamping device drives the pre-sheathed blank 4 to rotate around its own axis. At the same time, the spinning drive drives the spinning wheel 5 to move along the axial direction of the pre-sheathed blank 4. The spinning wheel 5 spins at the end of the pre-sheathed blank 4 to form a spinning recessed composite portion 4a. At the spinning position, the inner base tube and the outer covering tube are compounded together.

[0050] It can be understood that before spinning and rolling, there is a gap between the pre-mounted blank 4 and the outer wall of the mandrel 7, so that a spinning concave composite part 4a can be formed after spinning, that is, at the spinning position, the inner base tube and the outer cladding tube are composited together.

[0051] S4: using the pushing device 1 to push the pre-sheathed blank 4 into the tube rolling unit, and rolling the pre-sheathed blank 4 to form a bimetallic composite tube.

[0052] After spinning is completed, the clamping device releases the pre-sheathed blank 4, the pushing member of the pushing device 1 abuts against the end of the pre-sheathed blank 4 away from the tube rolling unit, and the pushing driving member drives the pushing member to move along the axial direction of the pre-sheathed blank 4, thereby pushing the pre-sheathed blank 4 to move along its axial direction, so that the pre-sheathed blank 4 enters the tube rolling unit, and the pre-sheathed blank 4 is rolled into a bimetallic composite tube by the tube rolling unit.

[0053] In step S3, while the clamping device drives the pre-mounted blank 4 to rotate, the spinning driver drives the spinning wheel 5 to move 10mm-30mm axially along the pre-mounted blank 4. Exemplarily, the spinning driver drives the spinning wheel 5 to move 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm or 30mm axially along the pre-mounted blank 4. In this way, the axial extension distance of the spinning concave composite part 4a along the pre-mounted blank 4 is reasonable, which will not be too short to cause the inner base tube and the outer coating tube to be composited loosely, nor too long to reduce the production efficiency.

[0054] After the inner base tube and the outer tube are sheathed to form a pre-sheathed blank 4 in step S1, and before the pre-sheathed blank 4 is clamped by a clamping device in step S2, step S1' is also included: the two ends of the pre-sheathed blank 4 are sealed with high-temperature resistant flame-retardant adhesive, and the pre-sheathed blank 4 is placed in a vacuum heating furnace for heating and insulation within a preset temperature range. Specifically, after the two ends of the pre-sheathed blank 4 are sealed with high-temperature resistant flame-retardant adhesive, the pre-sheathed blank 4 is placed in a vacuum heating furnace for heating and insulation. The temperature in the vacuum heating furnace can be adaptively adjusted for the materials of the inner base tube and the outer tube. For example, when the inner base tube is an aluminum tube and the outer tube is a titanium tube, the temperature in the vacuum heating furnace is 400°C-550°C, and the insulation time is 20min-40min.

[0055] In addition, before the inner base tube and the outer covering tube are sheathed to form the pre-sheathed blank 4 in step S1, step S0 is also included: grinding the outer surface of the inner base tube and the inner surface of the outer covering tube, so as to remove impurities such as oxides on the outer surface of the inner base tube and the inner surface of the outer covering tube, so as to make the outer surface of the inner base tube and the inner surface of the outer covering tube cleaner.

[0056] In another embodiment, in step S4, the pusher 1 is used to push the pre-assembled blank into the tube rolling unit for rolling to form the pre-assembled blank 4 into a bimetallic composite tube, and the step S4' is also included; the bimetallic composite tube is sheared and cut to obtain a bimetallic composite tube of a preset length.

[0057] 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.

[0058] 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 frame; A clamping device disposed on the support frame, the clamping device can clamp the pre-mounted blank and drive the pre-mounted blank to rotate; A spinning device is arranged on the support frame, the spinning device comprises a spinning drive member and at least one spinning wheel, the spinning drive member can drive the spinning wheel to move along the radial direction and axial direction of the pre-set blank; A material pushing device, the material pushing device is arranged on a side of the clamping device away from the spinning device, the material pushing device comprises a pushing member and a pushing driving member, the pushing member can abut against the end of the pre-set blank, and the pushing driving member can drive the pushing member to move along the axial direction of the pre-set blank, and the pushing member can pass through the through hole of the clamping device; A tube rolling mill set is arranged on the support frame, and the tube rolling mill set is used for rolling the pre-sheathed blank to form a bimetallic composite tube.

2. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The clamping device includes a base, a plurality of claws distributed along the circumferential direction, and a claw driving member, wherein the claw is movably arranged in a mounting hole of the base, and the claw driving member is arranged inside the base, and the claw driving member can drive the claw to move radially along the pre-mounted blank to clamp or release the pre-mounted blank.

3. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The push drive member includes a telescopic cylinder, a linear motor and / or an electromagnetic drive member; and / or the push member includes a push cylinder and / or a push rod.

4. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The spinning drive member includes a radial drive member and an axial drive member. The radial drive member can drive the spinning wheel to move radially along the pre-set blank, and the axial drive member can drive the radial drive member and the spinning wheel to move axially along the pre-set blank.

5. The bimetallic composite pipe processing equipment according to claim 4, characterized in that: The axial driving member includes a telescopic cylinder, a linear motor and / or an electromagnetic driving member; the radial driving member includes a telescopic cylinder, a linear motor and / or an electromagnetic driving member.

6. The bimetallic composite pipe processing equipment according to claim 1, characterized in that: The spinning device comprises three spinning wheels, and the three spinning wheels are evenly distributed along the circumference of the pre-set blank.

7. 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 6 comprises the following steps: Sheathing the inner base tube and the outer cladding tube to form a pre-sheathed blank, and passing the mandrel through the pre-sheathed blank; Clamping the pre-set blank using a clamping device; The spinning drive of the spinning device drives the spinning wheel to move to the end of the pre-sheathed blank close to the tube rolling unit, and the clamping device drives the pre-sheathed blank to rotate while the spinning drive drives the spinning wheel to move axially along the pre-sheathed blank, so that the end of the pre-sheathed blank forms a spinning concave composite part; The pre-sheathed blank is pushed into the tube rolling unit by a pushing device for rolling to form a bimetallic composite tube from the pre-sheathed blank.

8. The method for processing a bimetallic composite pipe according to claim 7, characterized in that: While the clamping device drives the pre-mounted blank to rotate, the spinning drive component drives the spinning wheel to move 10mm-30mm along the axial direction of the pre-mounted blank.

9. The method for processing a bimetallic composite pipe according to claim 7, 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 device, the process further includes the following steps: 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.

10. The method for processing a bimetallic composite pipe according to claim 7, characterized in that: Before the inner base tube and the outer covering tube are sheathed to form a pre-sheathed blank, the method further comprises the steps of: grinding the outer surface of the inner base tube and the inner surface of the outer covering tube; And / or, after the pre-sheathed blank is pushed into the tube rolling unit by a pushing device and rolled to form the pre-sheathed blank into a bimetallic composite tube, the method further comprises the step of shearing and cutting the bimetallic composite tube.

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