Rotary casting forming device for steel-aluminum composite pipe

Abstract

The invention relates to a rotary casting forming device for a steel-aluminum composite pipe. The rotary casting forming device comprises a supporting driving mechanism, a steel pipe mounting mechanism and a flow guide mechanism. The supporting driving mechanism comprises a bottom plate and at least two supporting units; the supporting unit comprises a supporting mounting plate and two supporting wheels; at least one supporting wheel is coaxially provided with a rotating motor. The steel pipe mounting mechanism comprises a roller sleeve used for being arranged on a to-be-formed steel pipe in a sleeving mode. The front end face of the foremost roller sleeve and the rear end face of the rearmost roller sleeve are respectively provided with an end cover flange; a sealing ring is further arranged between the end cover flange and the steel pipe to be formed. The roller sleeves are erected on the two supporting wheels of the corresponding supporting units; the flow guide mechanism comprises a flow guide groove; the diversion trench is obliquely arranged with high front and low back; the end cover flange is provided with a center hole; the rear end of the flow guide groove penetrates through a center hole of the end cover flange and extends into the to-be-formed steel pipe. The forming space of the aluminum layer is directly formed through the inner cavity of the steel pipe, and a mold is not independently arranged; the sealing is reliable; and the processing requirements of pipes with different lengths can be met.

Description

Technical Field

[0001] This invention relates to the field of metal composite pipe manufacturing equipment, and in particular to a rotary casting forming apparatus for steel-aluminum composite pipes. Background Technology

[0002] Currently, aluminum-steel composite pipes are mostly manufactured using centrifugal casting or specialized molds for aluminum cladding. However, existing equipment generally suffers from problems such as complex structure, poor adaptability, high requirements for steel pipe installation accuracy, and difficulty in adapting to different specifications. Specifically: 1. Traditional casting equipment requires specialized molds that match the pipe type, increasing production costs and preparation time, and resulting in poor flexibility; 2. Its sealing structure is difficult to adapt to steel pipes of different lengths, affecting the aluminum liquid filling effect and interface bonding quality; 3. Poor pipe diameter and length adaptability, insufficient versatility, and the equipment's support and positioning structure is designed with fixed dimensions, such as non-adjustable roller spacing and sealing component positions, limiting the production of only a single specification of composite pipe.

[0003] Therefore, there is an urgent need to develop a new type of rotary casting device that is structurally simple, highly versatile, flexible in operation, and can effectively improve the efficiency and yield of aluminum-steel composite pipe manufacturing. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a rotary casting forming device for steel-aluminum composite pipes, which directly forms the forming space for the aluminum layer through the inner cavity of the steel pipe without the need for a separate mold; it offers reliable sealing; and it can adapt to the processing needs of pipes of different lengths.

[0005] The technical solution adopted by this invention to solve its technical problem is: a rotary casting forming device for steel-aluminum composite pipes, comprising a support drive mechanism, a steel pipe installation mechanism, and a flow guiding mechanism; the support drive mechanism includes a base plate and at least two support units that are movable back and forth on the base plate and distributed back and forth; each support unit includes a support mounting plate and two support wheels that are mounted on the support mounting plate, one on the left and one on the right; at least one support wheel in the plurality of support units is coaxially equipped with a rotary motor; the steel pipe installation mechanism includes a number of roller sleeves corresponding to the support units; the roller sleeves are used to fit onto the steel pipe to be formed; wherein, the front end face of the foremost roller sleeve and the rearmost roller... The rear end face of the sleeve is respectively equipped with end cap flanges for corresponding mating with the front and rear end faces of the steel pipe to be formed; a sealing ring is also provided between the end cap flange and the end face of the steel pipe to be formed; the roller sleeve is mounted on two support wheels of the corresponding support unit and is in tangential contact with the two support wheels; the flow guiding mechanism includes a flow guiding groove; the flow guiding groove is inclined with the front higher than the rear, and the end cap flange has a central hole; the rear end of the flow guiding groove extends through the central hole of the end cap flange into the steel pipe to be formed, for guiding the aluminum liquid into the steel pipe to be formed, and the rotary motor is used to drive the support wheel to rotate, thereby driving the steel pipe to be formed to rotate, and thus allowing the aluminum liquid to be evenly guided into the inner wall of the rotating steel pipe to be formed.

[0006] Furthermore, the support unit also includes a slide rail fixed to the base plate in a front-to-back direction and a slider fixed to the bottom side of the support mounting plate and assembled with the slide rail.

[0007] Furthermore, the foremost support unit and the rearmost support unit also include a lead screw mounted on the base plate in a front-rear direction, a lead screw nut fixed to the bottom side of the support mounting plate and assembled with the lead screw, and an adjustable motor connected to the lead screw via a coupling; the adjustable motor is used to adjust the front-rear position of the foremost support unit and the rearmost support unit accordingly, control the distance between the foremost support unit and the rearmost support unit, and thus adapt to steel pipes of different lengths to be formed.

[0008] Furthermore, the surface of the support wheel is provided with abrasion-resistant sandpaper to increase the friction between the support wheel and the roller sleeve and reduce surface damage to the roller sleeve.

[0009] Furthermore, the side of the roller sleeve is also provided with an annular groove that mates with the support wheel.

[0010] Furthermore, a plurality of sleeve set screws are evenly arranged circumferentially on the side wall of the roller sleeve; the sleeve set screws are used to fix the roller sleeve to the steel pipe to be formed and to ensure that the steel pipe to be formed and the roller sleeve are concentrically arranged.

[0011] Furthermore, the axle of the support wheel is mounted on the support mounting plate via a bearing seat; the output shaft of the rotary motor is connected to the axle of the corresponding support wheel via a coupling.

[0012] Furthermore, the flow guiding mechanism also includes a slide fixed to the support mounting plate of the foremost support unit; a flow guiding groove bracket with height adjustment function is installed on the moving end of the slide; the height adjustment end of the flow guiding groove bracket is fixed to the flow guiding groove; the slide is used to drive the flow guiding groove to adjust its front and rear position along the axial direction of the steel pipe to be formed.

[0013] Furthermore, the bottom side of the base plate is also provided with multiple height-adjustable support feet.

[0014] Advantages of the present invention: The steel-aluminum composite pipe rotary casting forming device of the present invention has the following advantages:

[0015] 1. No separate mold required: The aluminum layer is formed directly through the inner cavity of the steel pipe to be formed, eliminating the need for a separate mold in the traditional process. This design not only simplifies the equipment structure and reduces manufacturing costs, but also avoids the contamination problem that may be caused by the mold coming into contact with the molten aluminum, while improving heat transfer efficiency.

[0016] II. Multi-specification adaptive capability: The position of the roller sleeve is precisely adjusted by the lead screw driven by the adjustable pitch motor, and the slide rail and slider are used to achieve rapid adaptation of steel pipes of different lengths to be formed; the height-adjustable guide channel support allows the guide channel to adapt to the processing needs of pipes of different diameters.

[0017] 3. Flexible sealing system: The sealing ring used effectively compensates for the dimensional fluctuations of the steel pipe to be formed due to changes in pipe length and thermal expansion. Through its cooperation with the end cover flange, it ensures reliable sealing performance and prevents the aluminum liquid from leaking.

[0018] IV. Steel Pipe Fixing: The roller sleeve is fixed with multiple sets of sleeve set screws. This design allows for a radial error of ±1mm in the steel pipe. The elastic tightening structure ensures the stability of the steel pipe and effectively alleviates dimensional fluctuations during processing, thus improving process stability. Attached Figure Description

[0019] Figure 1 A three-dimensional schematic diagram of a steel-aluminum composite pipe rotary casting forming device according to an embodiment;

[0020] Figure 2 A three-dimensional schematic diagram of a support unit for a steel-aluminum composite pipe rotary casting forming device according to an embodiment;

[0021] Figure 3 A three-dimensional schematic diagram of the steel pipe installation mechanism of a rotary casting forming device for steel-aluminum composite pipes, as shown in the embodiment.

[0022] Figure 4 A perspective view of the flow guiding mechanism of a steel-aluminum composite pipe rotary casting forming device according to an embodiment;

[0023] Figure 5 A front view schematic diagram of a steel-aluminum composite pipe rotary casting forming device according to an embodiment;

[0024] Figure 6 for Figure 5 A cross-sectional view of AA;

[0025] Figure 7 for Figure 6 A magnified view of a portion of region B;

[0026] Among them, 1-base plate, 2-support unit, 3-steel pipe installation mechanism, 4-flow guiding mechanism, 5-steel pipe to be formed, 11-support foot, 21-support mounting plate, 22-support wheel, 23-bearing seat, 24-rotary motor, 25-slide rail, 26-screw, 27-adjustable motor, 31-roller sleeve, 32-end cover flange, 33-sleeve top screw, 34-end cover bolt, 35-sealing ring, 311-ring groove, 41-slide table, 42-lower sleeve, 43-upper pipe, 44-flow guiding groove, 45-height adjusting bolt. Detailed Implementation

[0027] To enhance understanding of the present invention, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain the invention and do not limit the scope of protection of the invention.

[0028] Example

[0029] Please refer to Figures 1 to 7 As shown, this embodiment provides a rotary casting forming device for steel-aluminum composite pipes, including a support drive mechanism, a steel pipe mounting mechanism 3, and a flow guiding mechanism 4. The support drive mechanism includes a base plate 1 and at least two support units 2 that are movably mounted on the base plate 1 and distributed front to back. Each support unit 2 includes a support mounting plate 21 and two support wheels 22 mounted on the support mounting plate 21, one on the left and one on the right. At least one support wheel 22 in the multiple support units 2 is coaxially equipped with a rotary motor 24. The steel pipe mounting mechanism 3 includes a number of roller sleeves 31 corresponding to the number of support units 2. The roller sleeves 31 are used to fit onto the steel pipe 5 to be formed. The front end face of the foremost roller sleeve 31 and the rear end face of the last roller sleeve 31 are respectively mounted on... The system is equipped with end cap flanges 32 for corresponding mating with the front and rear faces of the steel pipe 5 to be formed; a sealing ring 35 is also provided between the end cap flange 32 and the end face of the steel pipe 5 to be formed; a roller sleeve 31 is mounted on two support wheels 22 of the corresponding support unit 2 and is in tangential contact with the two support wheels 22; the flow guiding mechanism 4 includes a flow guiding groove 44; the flow guiding groove 44 is inclined with the front higher than the rear, and the end cap flange 32 has a central hole; the rear end of the flow guiding groove 44 extends through the central hole of the end cap flange 32 into the steel pipe 5 to be formed, and is used to guide the aluminum liquid into the steel pipe 5 to be formed; the rotary motor 24 is used to drive the support wheel 22 to rotate, thereby driving the steel pipe 5 to be formed to rotate, and thus allowing the aluminum liquid to be evenly guided into the inner wall of the rotating steel pipe 5 to be formed.

[0030] In this embodiment, there are two support units, one in front and one in back. Each of the two support units has a rotating motor connected to a support wheel on the same side (right side). The two rotating motors operate synchronously to drive the two roller sleeves to rotate together.

[0031] Please refer to the following: Figure 2As shown, the axle of the support wheel 22 is mounted on the support mounting plate 21 via bearing housing 23; the output shaft of the rotary motor 24 is connected to the corresponding axle of the support wheel 22 via a coupling. Specifically, the rotary motor is a 200W servo motor; the two support wheels of the same support unit are respectively mounted on two parallel bearing housings, which are fixedly mounted on the support mounting plate with fixing bolts to ensure that the parallelism error of the axles of the two support wheels does not exceed 0.05mm; the output shaft of the 200W servo motor is connected to the axle of the support wheel 22 via a perforated coupling; the rotation speed of the rotary motor is precisely adjusted by the servo control system to provide a stable centrifugal force field for the uniform rotation of the steel pipe to be formed.

[0032] Please refer to the following: Figure 3 and Figure 7 As shown, the end cap flange 32 is fixed to the end face of the roller sleeve 31 by end cap bolts 34; multiple sleeve set screws 33 are evenly arranged circumferentially on the side wall of the roller sleeve 31; the sleeve set screws 33 are used to fix the roller sleeve 31 to the steel pipe 5 to be formed, and to ensure that the steel pipe 5 to be formed and the roller sleeve 31 are concentrically arranged. Specifically, the sealing ring adopts a high-temperature resistant ceramic fiber sealing ring. By applying a pre-tightening force through the end cap flange and the end cap bolts of the roller sleeve, the sealing ring undergoes radial compression deformation, which can effectively block the leakage path of aluminum liquid; the outer wall of the steel pipe to be formed is clearance-fitted with the inner wall of the roller sleeve. After the steel pipe to be formed is inserted into the roller sleeve, the sleeve set screws evenly distributed circumferentially along the roller sleeve are screwed in and pressed against the outer surface of the steel pipe to be formed, forming a stable structure, ensuring that the coaxiality error between the steel pipe to be formed and the roller sleeve is not greater than 0.1mm; in addition, the end cap flange can introduce inert gas into the steel pipe to be formed through the central hole to avoid oxidation of aluminum liquid.

[0033] Please refer to the following: Figure 2As shown, the support unit 2 also includes a slide rail 25 fixed to the base plate 1 in a front-to-back direction, and a slider fixed to the bottom side of the support mounting plate 21 and assembled with the slide rail 25; the foremost support unit 2 and the last support unit 2 also include a lead screw 26 mounted on the base plate 1 in a front-to-back direction, a lead screw nut fixed to the bottom side of the support mounting plate 21 and assembled with the lead screw 26, and an adjustable motor 27 connected to the lead screw 26 via a coupling; the adjustable motor 27 is used to adjust the front-to-back position of the foremost support unit 2 and the last support unit 2 accordingly, control the distance between the foremost support unit 2 and the last support unit 2, and thus adapt to steel pipes 5 of different lengths to be formed. Specifically, the pitch-adjustable motor also adopts a servo motor. The output shaft of the pitch-adjustable motor is connected to the lead screw through a swivel coupling. The two ends of the lead screw are fixed to the base plate by fixing bolts through the lead screw bearing seats. The lead screw and the lead screw form a ball screw pair, and the slider and the slide rail form a linear rolling guide pair. When the pitch-adjustable motor rotates, it drives the lead screw to rotate. The lead screw converts the rotational motion into linear motion, driving the slider and the support mounting plate to move precisely in a straight line along the slide rail, thereby realizing the axial pitch adjustment of the two roller sleeves.

[0034] In this embodiment, the surface of the support wheel 22 is provided with abrasion-resistant sandpaper to increase the friction between the support wheel 22 and the roller sleeve 31 and reduce surface damage to the roller sleeve 31.

[0035] Please refer to the following: Figure 3 and Figure 7 As shown, the side of the roller sleeve 31 is also provided with an annular groove 311 that cooperates with the support wheel 22. By cooperating with the support wheel through the annular groove, the roller sleeve can be limited in the front and rear directions, thus preventing the steel pipe installation mechanism and the steel pipe to be formed from moving back and forth during operation.

[0036] Please refer to the following: Figure 4 and Figure 6As shown, the flow guiding mechanism 4 also includes a slide table 41 fixed to the support mounting plate 21 of the foremost support unit 2; a flow guiding groove bracket with height adjustment function is installed on the moving end of the slide table 41; the height adjustment end of the flow guiding groove bracket is fixed to the flow guiding groove 44; the slide table 41 is used to drive the flow guiding groove 44 to adjust its front and rear position along the axial direction of the steel pipe 5 to be formed. In this embodiment, the slide table 41 is a hand-cranked slide table, and its moving end position is adjusted by hand-cranking. The guide channel bracket is installed on the moving end of the slide table by bolts. The guide channel bracket includes a lower sleeve 42 and an upper tube 43 sleeved inside the lower sleeve 42. The guide channel 44 is fixed to the top of the upper tube 43. A long groove in the vertical direction is provided on the outer wall of the lower sleeve 42. Bolt holes are provided on the side wall of the upper tube 43. The upper tube is adjusted to the required height, and the upper tube and the lower sleeve are locked by passing the height adjustment bolt 45 through the long groove and using the bolt holes. By adjusting the height of the guide channel, it can be adapted to steel pipes of different diameters to be formed. The position of the end of the guide channel is controlled by the slide table, and a leak-free connection of the aluminum liquid flow channel is achieved.

[0037] Please refer to the following: Figure 1 and Figure 6 As shown, the bottom side of the base plate 1 is also provided with multiple height-adjustable support feet 11. Each support foot 11 includes a base, which is connected to the base plate via screws. The screws are located on the upper and lower sides of the base plate and are locked in place by a double-nut locking mechanism. By adjusting the height of each support foot 11, the base plate 1 is ensured to be in a horizontal state.

[0038] This embodiment of a steel-aluminum composite pipe rotary casting forming device, upon startup, the rotary motor is energized and operates, and the output torque is transmitted to the support wheel via a plum blossom coupling. The support wheel acts on the roller sleeve, providing stable power for the uniform rotation of the steel pipe to be formed, ensuring that the molten aluminum inside the steel pipe receives a precise centrifugal force field to meet the forming requirements of the molten aluminum; by driving the lead screw with an adjustable pitch motor according to actual needs, the radial precision of the roller sleeves of the two support units is achieved to accommodate steel pipes of different lengths; by sliding... The platform and guide channel support adjust the front-to-back and height positions of the guide channel to ensure precise alignment between the outlet end of the guide channel and the steel pipe to be formed. Molten aluminum flows from the guide channel into the steel pipe, and the end cap flange and sealing ring form a high-pressure seal on the steel pipe under pre-tightening force to prevent aluminum leakage. Simultaneously, inert gas is introduced into the steel pipe to prevent aluminum oxidation. Under the rotation of the steel pipe, the molten aluminum is evenly distributed on the inner wall of the pipe. After solidification, a composite pipe with a steel outer layer and an aluminum inner layer is obtained. Alternatively, the molten aluminum can be an aluminum alloy, resulting in a composite pipe with a steel outer layer and an aluminum alloy inner layer.

[0039] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A rotary casting forming device for steel-aluminum composite pipes, characterized in that: The system includes a support drive mechanism, a steel pipe installation mechanism (3), and a flow guiding mechanism (4). The support drive mechanism includes a base plate (1) and at least two support units (2) that are movable back and forth on the base plate (1) and distributed back and forth. Each support unit (2) includes a support mounting plate (21) and two support wheels (22) that are mounted on the support mounting plate (21) on the left and right sides respectively. At least one support wheel (22) in the multiple support units (2) is coaxially equipped with a rotary motor (24). The steel pipe installation mechanism (3) includes a number of roller sleeves (31) corresponding to the support units (2). The roller sleeves (31) are used to be fitted onto the steel pipe (5) to be formed. The front end face of the frontmost roller sleeve (31) and the rear end face of the rearmost roller sleeve (31) are respectively equipped with a front end face for connecting with the front end of the steel pipe (5) to be formed. The end face and the rear end face are respectively fitted with end cap flanges (32); a sealing ring (35) is also provided between the end cap flange (32) and the end face of the steel pipe (5) to be formed; the roller sleeve (31) is mounted on the two support wheels (22) of the corresponding support unit (2) and is in tangential contact with the two support wheels (22); the flow guiding mechanism (4) includes a flow guiding groove (44); the flow guiding groove (44) is inclined with the front higher and the rear lower, and the end cap flange (32) has a central hole; the rear end of the flow guiding groove (44) passes through the central hole of the end cap flange (32) and extends into the steel pipe (5) to be formed, and is used to guide the aluminum liquid into the steel pipe (5) to be formed; the rotary motor (24) is used to drive the support wheel (22) to rotate, drive the steel pipe (5) to be formed to rotate, and then make the aluminum liquid evenly introduced into the inner wall of the rotating steel pipe (5) to be formed.

2. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The support unit (2) also includes a slide rail (25) fixed on the base plate (1) and in the front-back direction, and a slider fixed on the bottom side of the support mounting plate (21) and assembled with the slide rail (25).

3. The rotary casting forming device for steel-aluminum composite pipes according to claim 2, characterized in that: The foremost support unit (2) and the last support unit (2) also include a lead screw (26) mounted on the base plate (1) in a front-rear direction, a lead screw nut fixed to the bottom side of the support mounting plate (21) and assembled with the lead screw (26), and an adjustable motor (27) connected to the lead screw (26) via a coupling. The adjustable motor (27) is used to adjust the front-rear position of the foremost support unit (2) and the last support unit (2) and control the distance between the foremost support unit (2) and the last support unit (2) to adapt to steel pipes (5) of different lengths to be formed.

4. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The surface of the support wheel (22) is provided with abrasion-resistant sandpaper to increase the friction between the support wheel (22) and the roller sleeve (31) and reduce surface damage to the roller sleeve (31).

5. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The side of the roller sleeve (31) is also provided with an annular groove (311) that cooperates with the support wheel (22).

6. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The roller sleeve (31) has a plurality of sleeve set screws (33) evenly arranged in a circumferential direction on its side wall; the sleeve set screws (33) are used to fix the roller sleeve (31) and the steel pipe (5) to be formed, and to ensure that the steel pipe (5) to be formed and the roller sleeve (31) are concentrically arranged.

7. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The axle of the support wheel (22) is mounted on the support mounting plate (21) via a bearing seat (23); the output shaft of the rotary motor (24) is connected to the axle of the corresponding support wheel (22) via a coupling.

8. A rotary casting forming apparatus for steel-aluminum composite pipes according to any one of claims 1-7, characterized in that: The flow guiding mechanism (4) also includes a slide (41) fixed to the support mounting plate (21) of the foremost support unit (2); a flow guiding groove bracket with height adjustment function is installed on the moving end of the slide (41); the height adjustment end of the flow guiding groove bracket is fixed to the flow guiding groove (44); the slide (41) is used to drive the flow guiding groove (44) to adjust its front and rear position along the axial direction of the steel pipe (5) to be formed.

9. The rotary casting forming device for steel-aluminum composite pipes according to claim 1, characterized in that: The bottom side of the base plate (1) is also provided with multiple height-adjustable support feet (11).

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