A steel pipe dividing device and a hairpin pipe forming machine

Abstract

The utility model discloses a kind of steel pipe breaking device and hairpin pipe forming machine, including pedestal, cutting assembly, feed drive mechanism, rotary drive mechanism, two steel pipe clamping assemblies and pull-off driver;Steel pipe breaking device works, steel pipe passes through the steel pipe guide hole of guide shaft and extends predetermined length, two steel pipe clamping assemblies are respectively clamped steel pipe, subsequently rotary drive mechanism drives rotary frame and cutting tool head rotation, and feed drive mechanism drives cutting tool head feed, to cut and remove steel pipe outer peripheral material, the outer periphery of steel pipe forms certain depth cutting groove, and cutting groove depth is less than the pipe thickness of steel pipe, at this time steel pipe is not cut through, subsequently by pull-off driver drive two steel pipe clamping assemblies mutually away to cut steel pipe at cutting groove and break, so that the mouth of steel pipe is not prone to produce flanging and burr defect, and then reduce the risk of expansion crack of the mouth of steel pipe when expanding pipe.

Description

Technical Field

[0001] This utility model relates to heat exchanger production equipment, and in particular to a steel pipe cutting device and a hairpin tube forming machine. Background Technology

[0002] In some existing heat exchanger manufacturing processes, the cutting device of the hairpin tube forming machine uses a saw blade to directly cut the steel tube to a predetermined length. The steel tube is then bent into a specified shape and assembled with heat exchange fins to form the heat exchanger. Afterward, the heat exchanger needs to undergo a tube expansion process to expand the steel tube. Because the cutting device directly cuts the steel tube to the predetermined length using a saw blade, the tube end is prone to retaining burrs and other defects, which may cause the tube end to crack during the expansion process, affecting the production quality of the heat exchanger. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a steel pipe cutting device that can reduce defects such as flanges and burrs at the pipe ends.

[0004] This utility model also proposes a hairpin tube forming machine with the above-mentioned steel pipe cutting device.

[0005] According to a first aspect of the present invention, a steel pipe cutting device includes a base, a cutting assembly, a feed drive mechanism, a rotary drive mechanism, two steel pipe clamping assemblies, and a breaking actuator. The cutting assembly includes a guide shaft, a rotating frame, and a cutting head. The guide shaft is disposed on the base and has a steel pipe guide hole for the steel pipe to pass through. The rotating frame is rotatably disposed around the axis of the steel pipe guide hole on the outer periphery of the guide shaft. The cutting head is movably disposed on the rotating frame radially along the steel pipe guide hole. The cutting head rotates synchronously with the rotating frame and is located at one end of the steel pipe guide hole. The feed depth of the cutting head is less than the thickness of the steel pipe. The feed drive mechanism is disposed on the base and can drive the cutting assembly. The cutting head moves radially along the guide hole of the steel pipe; a rotary drive mechanism is disposed on the base and is used to drive the rotating frame to rotate; two steel pipe clamping assemblies are disposed on the base and arranged along the hole axis of the steel pipe guide hole, the cutting assembly is located between the two steel pipe clamping assemblies, at least one of the steel pipe clamping assemblies is movable relative to the base along the hole axis of the steel pipe guide hole, and the steel pipe clamping assembly can clamp or release the steel pipe; a pull-off driver is disposed on the base and can drive the two steel pipe clamping assemblies to move closer or further away from each other.

[0006] According to the first aspect of the present invention, the steel pipe cutting device has at least the following beneficial effects: When the steel pipe cutting device is working, the steel pipe passes through the steel pipe guide hole of the guide shaft and extends out to a predetermined length. Two steel pipe clamping assemblies clamp the steel pipe respectively. Then, the rotation drive mechanism drives the rotating frame and the cutting head to rotate, and the feed drive mechanism drives the cutting head to feed, so as to cut and remove the material on the outer periphery of the steel pipe, so that a cutting groove of a certain depth is formed on the outer periphery of the steel pipe, and the depth of the cutting groove is less than the thickness of the steel pipe. At this time, the steel pipe is not cut through. Then, the two steel pipe clamping assemblies are driven to move away from each other by the pull-off driver to pull the steel pipe off at the cutting groove, so that the pipe end of the steel pipe is not prone to flange and burr defects, thereby reducing the risk of the pipe end of the steel pipe cracking during pipe expansion.

[0007] According to some embodiments of the present invention, the steel pipe clamping assembly includes a mounting base, a clamping driver, and a pair of clamping bodies. The mounting base is disposed on the base, the two clamping bodies are opposite to each other, at least one of the clamping bodies is movably disposed on the mounting base, and a steel pipe clamping position is formed between the pair of clamping bodies. The clamping driver is disposed on the mounting base and is used to drive the two clamping bodies to move closer or further apart.

[0008] According to some embodiments of the present invention, the clamping body is provided with a receiving groove along the axial direction of the guide hole of the steel pipe. The cross-section of the receiving groove is semi-circular. The openings of the receiving grooves of the two clamping bodies are opposite to each other, and the receiving grooves of the two clamping bodies form the steel pipe clamping position.

[0009] According to some embodiments of the present invention, the clamping body is provided with at least two receiving slots, and all the receiving slots are parallel to each other.

[0010] According to some embodiments of the present invention, the cutting assembly further includes a support roller, which is rotatably mounted on the rotating frame. The rotation axis of the support roller relative to the rotating frame is parallel to the hole axis of the steel pipe guide hole. The support roller is radially movable along the steel pipe guide hole. The support roller and the cutting head are evenly arranged around the hole axis of the steel pipe guide hole. The feed drive mechanism can drive the support roller and the cutting head to move synchronously along the radial direction of the steel pipe guide hole.

[0011] According to some embodiments of this utility model, the rotating frame includes a frame body, a transmission cylinder, and a sliding member. The frame body is rotatably connected to the outer periphery of the guide shaft around the hole axis of the steel pipe guide hole. The transmission cylinder is slidably disposed on the outer periphery of the frame body along the hole axis of the steel pipe guide hole. The sliding member is slidably connected to the frame body along the radial direction of the steel pipe guide hole. The sliding member rotates synchronously with the frame body. The sliding member is provided with an inclined top surface. The transmission cylinder is provided with an inclined top mating surface. The feed drive mechanism includes a linear drive structure and an elastic reset member. The linear drive structure is used to drive the transmission cylinder to move along the hole axis of the steel pipe guide hole. When the transmission cylinder moves forward, it can push and engage with the inclined top surface through the inclined top mating surface to drive the sliding member to move closer to the hole axis of the steel pipe guide hole. The elastic reset member is disposed between the sliding member and the frame body and can apply a force to move the sliding member away from the hole axis of the steel pipe guide hole. The cutting head is mounted on the sliding member.

[0012] According to some embodiments of this utility model, the rotating frame is provided with at least two sliding members, all of which are evenly arranged around the hole axis of the steel pipe guide hole. The cutting head is installed on one of the sliding members, and the remaining sliding members are rotatably provided with support wheels. The rotation axis of the support wheels is parallel to the hole axis of the steel pipe guide hole.

[0013] According to some embodiments of the present invention, the outer periphery of the transmission cylinder is provided with an annular groove, the annular groove is arranged around the hole axis of the steel pipe guide hole, the linear drive structure includes a linear driver, a push frame and a push wheel, the push wheel is pivotally connected to the push frame, the rotation axis of the push wheel is perpendicular to the hole axis of the steel pipe guide hole, the push wheel is located in the annular groove, the push frame is movably arranged on the base along the hole axis direction of the steel pipe guide hole, and the linear driver is used to drive the push frame to move.

[0014] According to some embodiments of the present invention, the cutting components are provided in an even number, and the steel pipe clamping components are provided with at least one pair of clamping bodies, with each pair of clamping bodies corresponding to two cutting components.

[0015] The hairpin tube forming machine according to the second aspect of this utility model adopts the above-mentioned steel pipe cutting device.

[0016] The hairpin tube forming machine according to the second aspect of the present invention has at least the following beneficial effects: due to the adoption of the above-mentioned steel pipe cutting device, the quality of the steel pipe products produced by the hairpin tube forming machine is more stable, and the risk of steel pipe heat exchangers cracking during the tube expansion process can be reduced.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a three-dimensional schematic diagram of the steel pipe splitting device according to an embodiment of the present utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the steel pipe splitting device according to an embodiment of the present invention, taken in another direction.

[0021] Figure 3 This is an embodiment of the present utility model. Figure 2 Cross-sectional view along the BB direction;

[0022] Figure 4 This is an embodiment of the present utility model. Figure 3 A magnified view of a portion at point C;

[0023] Figure 5 This is a perspective view of the cutting assembly according to an embodiment of the present utility model;

[0024] Figure 6 This is an exploded view of the steel pipe clamping assembly according to an embodiment of the present invention.

[0025] Figure label:

[0026] Base 100;

[0027] Cutting assembly 200, guide shaft 210, steel pipe guide hole 211, rotating frame 220, frame body 221, transmission cylinder 222, annular groove 2221, sliding part 223, inclined top surface 2231, cutting head 230, support roller 240;

[0028] Feed drive mechanism 300, linear actuator 310, push frame 320, push wheel 330;

[0029] Rotary drive mechanism 400;

[0030] Steel pipe clamping assembly 500, mounting base 510, clamping driver 520, clamping body 530, receiving groove 531;

[0031] Pull-out driver 600;

[0032] 700 steel pipe;

[0033] The axis A of the guide hole in the steel pipe. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Refrigerant pipes, commonly known as hairpin pipes, are the pipes in a condenser that supply refrigerant. Refrigerant pipes can be made by cutting and bending copper or steel pipes.

[0039] Reference Figures 1 to 6This utility model discloses a steel pipe cutting device, comprising a base 100, a cutting assembly 200, a feed drive mechanism 300, a rotary drive mechanism 400, two steel pipe clamping assemblies 500, and a breaking actuator 600. The cutting assembly 200 includes a guide shaft 210, a rotating frame 220, and a cutting head 230. The guide shaft 210 is disposed on the base 100 and has a steel pipe guide hole 211 for the steel pipe to pass through. The rotating frame 220 is rotatably disposed around the axis of the steel pipe guide hole 211 on the outer periphery of the guide shaft 210. The cutting head 230 is movably disposed on the rotating frame 220 along the radial direction of the steel pipe guide hole 211, rotating synchronously with the rotating frame 220. The cutting head 230 is located at one end of the steel pipe guide hole 211, and the feed depth of the cutting head 230 is less than the thickness of the steel pipe. The feed drive mechanism 300... A cutting head 230 is mounted on the base 100 and can drive the cutting head 230 to move radially along the guide hole 211 of the steel pipe; a rotary drive mechanism 400 is mounted on the base 100 and is used to drive the rotating frame 220 to rotate; two steel pipe clamping assemblies 500 are mounted on the base 100 and arranged along the hole axis of the guide hole 211 of the steel pipe, and the cutting assembly 200 is located between the two steel pipe clamping assemblies 500, one of which is movable relative to the base 100 along the hole axis of the guide hole 211 of the steel pipe; a pull-off actuator 600 is mounted on the base 100 and can drive the two steel pipe clamping assemblies 500 to move closer to or further away from each other.

[0040] When the steel pipe cutting device is working, the steel pipe passes through the steel pipe guide hole 211 of the guide shaft 210 and extends a predetermined length. Two steel pipe clamping assemblies 500 clamp the steel pipe respectively. Then, the rotation drive mechanism 400 drives the rotating frame 220 and the cutting head 230 to rotate, and the feed drive mechanism 300 drives the cutting head 230 to feed, so as to cut and remove the material on the outer periphery of the steel pipe, so that a cutting groove of a certain depth is formed on the outer periphery of the steel pipe, and the depth of the cutting groove is less than the thickness of the steel pipe. At this time, the steel pipe is not cut through. Then, the pull-off driver 600 drives the two steel pipe clamping assemblies 500 to move away from each other, so as to pull the steel pipe off at the cutting groove. This makes it less likely for flange and burr defects to occur at the pipe end, thereby reducing the risk of pipe end cracking during expansion. After the pull-off is completed, the steel pipe clamping assembly 500 releases the steel pipe and resets, the cutting head 230 resets, and the next cycle begins.

[0041] Specifically, the steel pipe is fed from back to front. Of the two steel pipe clamping assemblies 500, the steel pipe clamping assembly 500 located on the rear side is installed on the base 100, and the steel pipe clamping assembly 500 located on the front side is slidably connected to the base 100. The corresponding pull-off driver 600 drives the steel pipe clamping assembly 500 located on the front side to slide, which facilitates continuous production and improves production efficiency.

[0042] It is conceivable that both steel pipe clamping assemblies 500 could be slidably connected to the base 100, and the pull-off driver 600 could drive the two steel pipe clamping assemblies 500 to slide respectively.

[0043] Specifically, the breakage actuator 600 is a hydraulic cylinder, which provides good breakage stability. It is conceivable that the breakage actuator 600 could also be an electric cylinder or a pneumatic cylinder, for example.

[0044] Specifically, the rotary drive mechanism 400 uses a motor and a synchronous belt to drive the rotary frame 220 and the cutting head 230 to rotate. It is conceivable that the rotary drive mechanism 400 could also be, for example, a motor coupled with a gear set to drive the rotary frame 220 and the cutting head 230 to rotate.

[0045] In the embodiments, reference is made to Figure 6 The steel pipe clamping assembly 500 includes a mounting base 510, a clamping driver 520, and a pair of clamping bodies 530. The mounting base 510 is disposed on the base 100, the two clamping bodies 530 are opposite to each other, one of the clamping bodies 530 is movably disposed on the mounting base 510, and a steel pipe clamping position is formed between the pair of clamping bodies 530. The clamping driver 520 is disposed on the mounting base 510 and is used to drive the two clamping bodies 530 to move closer or further apart from each other.

[0046] The steel pipe clamping assembly 500 described above can move one of the clamping bodies 530 by driving the clamping driver 520, so that the two clamping bodies 530 can move closer or further apart. The structure is simple and easy to implement.

[0047] Specifically, two clamping bodies 530 are arranged side by side, one above the other. The lower clamping body 530 is fixed to the mounting base 510, while the upper clamping body 530 is slidably connected to the mounting base 510. The clamping actuator 520 can be a hydraulic cylinder, electric cylinder, or pneumatic cylinder, etc., to drive the upper clamping body 530 to rise and fall, thereby clamping or releasing the steel pipe. The mounting base 510 of the steel pipe clamping assembly 500 located at the front is slidably connected to the base 100 via a slide rail slider structure.

[0048] It is conceivable that in the movable steel pipe clamping assembly 500, the mounting base 510 can also be movable relative to the base 100 through, for example, a guide post and guide sleeve structure.

[0049] In the embodiments, reference is made to Figure 6The clamping body 530 is provided with a receiving groove 531 along the axis of the guide hole 211 of the steel pipe. The cross-section of the receiving groove 531 is semi-circular. The openings of the receiving grooves 531 of the two clamping bodies 530 are opposite each other, forming a clamping position for the steel pipe. By setting the receiving groove 531, the steel pipe can be embedded in the receiving groove 531. The semi-circular cross-section of the receiving groove 531 plays a contour clamping role, making it less likely to flatten the steel pipe when the two clamping bodies 530 come together. This increases the contact area of ​​clamping and reduces the pressure per unit area, reducing the risk of steel pipe deformation, thereby improving the safety and stability of clamping.

[0050] In the embodiments, reference is made to Figure 6 The clamping body 530 is provided with two receiving slots 531, all of which are parallel to each other. Each pair of clamping bodies 530 is provided with two receiving slots 531, which can clamp two steel pipes at the same time, facilitating mass production.

[0051] It is conceivable that the clamping body 530 may also have three or more receiving slots 531, which is not limited here.

[0052] Specifically, each steel pipe clamping assembly 500 has two or more pairs of clamping bodies 530 arranged in the left-right direction, and each pair of clamping bodies 530 can clamp two steel pipes.

[0053] In the embodiments, reference is made to Figure 5 The cutting assembly 200 also includes a support roller 240, which is rotatably mounted on the rotating frame 220. The rotation axis of the support roller 240 relative to the rotating frame 220 is parallel to the hole axis of the steel pipe guide hole 211. The support roller 240 is movable radially along the steel pipe guide hole 211. The support roller 240 and the cutting head 230 are evenly arranged around the hole axis of the steel pipe guide hole 211. The feed drive mechanism 300 can drive the support roller 240 and the cutting head 230 to move synchronously radially along the steel pipe guide hole 211.

[0054] When the cutting head 230 feeds into the steel pipe, the support roller 240 also approaches and abuts against the outer circumference of the steel pipe, so that the outer circumference of the steel pipe is subjected to relatively uniform force. The support roller 240 can reduce the risk of deformation of the steel pipe caused by cutting external force, making the quality of the steel pipe more stable.

[0055] In the embodiments, reference is made to Figure 4 and Figure 5The rotating frame 220 includes a frame body 221, a transmission cylinder 222, and a sliding member 223. The frame body 221 is rotatably connected to the outer periphery of the guide shaft 210 around the axis of the guide hole 211 in the steel pipe. The transmission cylinder 222 is slidably disposed on the outer periphery of the frame body 221 along the axis of the guide hole 211 in the steel pipe. The sliding member 223 is slidably connected to the frame body 221 radially along the guide hole 211 in the steel pipe. The sliding member 223 rotates synchronously with the frame body 221. The sliding member 223 is provided with an inclined top surface 2231, and the transmission cylinder 222 is provided with an inclined top mating surface. (Feed...) The drive mechanism 300 includes a linear drive structure and an elastic reset member. The linear drive structure is used to drive the transmission cylinder 222 to move along the hole axis of the steel pipe guide hole 211. When the transmission cylinder 222 moves forward, it can push and cooperate with the inclined top surface 2231 through the inclined top mating surface to drive the sliding member 223 to move closer to the hole axis of the steel pipe guide hole 211. The elastic reset member is disposed between the sliding member 223 and the frame body 221 and can apply a force to make the sliding member 223 move away from the hole axis of the steel pipe guide hole 211. The cutting head 230 is mounted on the sliding member 223.

[0056] During the rotation of the rotating frame 220, when the cutting head 230 needs to be fed, the linear drive structure drives the transmission cylinder 222 to move forward. The transmission cylinder 222 pushes the sliding member 223 and the cutting head 230 to feed through the inclined top mating surface and the inclined top surface 2231, cutting the steel pipe. During this process, the elastic reset member is compressed. When the cutting is completed, the cutting head 230 needs to be reset. At this time, the linear drive structure drives the transmission cylinder 222 to move backward, allowing the sliding member 223 to move away from the hole axis of the steel pipe guide hole 211 and reset. At this time, the elastic reset member relaxes and drives the sliding member 223 and the cutting head 230 to reset, so as to facilitate the next cycle.

[0057] Specifically, the elastic reset component can be, for example, a spring or an elastic rubber block, to drive the sliding component 223 and the cutting head 230 to reset.

[0058] In the embodiments, reference is made to Figure 5 The rotating frame 220 is provided with three sliding members 223. All sliding members 223 are evenly arranged around the hole axis of the steel pipe guide hole 211. The cutting head 230 is installed on one of the sliding members 223. The remaining sliding members 223 are rotatably provided with support wheels 240. The rotation axis of the support wheels 240 is parallel to the hole axis of the steel pipe guide hole 211.

[0059] One sliding member 223 is used to install the cutting head 230, and two sliding members 223 are used to install the support roller 240. This significantly improves the cutting stability of the steel pipe, and the cutting assembly 200 is easier to manufacture.

[0060] Specifically, both the inclined top surface 2231 and the inclined top mating surface are conical surfaces.

[0061] It is conceivable that in other embodiments, the rotating frame 220 may also be provided with two, four or more sliding members 223, which can be specifically selected by those skilled in the art according to actual needs.

[0062] In the embodiments, reference is made to Figure 4 and Figure 5 The outer periphery of the transmission cylinder 222 is provided with an annular groove 2221, which surrounds the hole axis of the steel pipe guide hole 211. The linear drive structure includes a linear driver 310, a push frame 320 and a push wheel 330. The push wheel 330 is pivotally connected to the push frame 320. The rotation axis of the push wheel 330 is perpendicular to the hole axis of the steel pipe guide hole 211. The push wheel 330 is located in the annular groove 2221. The push frame 320 is movably disposed on the base 100 along the hole axis of the steel pipe guide hole 211. The linear driver 310 is used to drive the push frame 320 to move.

[0063] Since the transmission cylinder 222 also needs to rotate when the rotating frame 220 rotates, the linear drive structure adopts a pusher frame 320 and a pusher wheel 330. The pusher wheel 330 is located in the annular groove 2221. When the linear actuator 310 drives the pusher frame 320 and the pusher wheel 330 to move forward, the pusher wheel 330 abuts against the front side wall of the annular groove 2221, driving the cutting head 230 to feed. At this time, the transmission cylinder 222 and the pusher wheel 330 rotate in coordination to reduce the friction between them. When the linear actuator 310 drives the pusher frame 320 and the pusher wheel 330 to move backward, the pusher wheel 330 abuts against the rear side wall of the annular groove 2221, so that the cutting head 230 returns to its original position.

[0064] Specifically, the linear actuator 310 uses a motor, a lead screw, and a lead screw nut to drive the pusher frame 320 to move back and forth. The pusher frame 320 is slidably connected to the base 100 via a guide post and guide sleeve structure. It is conceivable that the linear actuator 310 could also be, for example, an electric cylinder or a hydraulic cylinder, and the pusher frame 320 could also be slidably connected to the base 100 via a slide rail and slider structure.

[0065] It is conceivable that in other embodiments, the linear drive structure may also be implemented in other ways, such as using an electric cylinder installed between the frame body 221 and the transmission cylinder 222 to directly drive the transmission cylinder 222 to move back and forth relative to the frame body 221, so as to drive the cutting head 230 to feed or allow the cutting head 230 to reset.

[0066] In the embodiments, reference is made to Figure 1 and Figure 2The cutting assembly 200 has an even number of components, and the steel pipe clamping assembly 500 has one or more clamping bodies 530, with each pair of clamping bodies 530 corresponding to two cutting assemblies 200. This reduces the number of clamping bodies 530, and the clamping balance of the clamping bodies 530 on the steel pipe is easy to control, resulting in higher efficiency for mass production.

[0067] Specifically, in this embodiment, eight cutting components 200 are provided, and each steel pipe clamping component 500 is provided with four pairs of clamping bodies 530.

[0068] Specifically, in this embodiment, the cutting head 230 is a lathe tool, which is prismatic in shape and is used to turn the steel pipe to remove material.

[0069] This utility model also discloses a hairpin tube forming machine, which employs the aforementioned steel pipe cutting device. Due to the use of this steel pipe cutting device, the quality of the steel pipe products produced by the hairpin tube forming machine is more stable, reducing the risk of steel pipe heat exchangers cracking during the tube expansion process.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A steel pipe cutting device, characterized in that, include: Base (100); A cutting assembly (200) includes a guide shaft (210), a rotating frame (220), and a cutting head (230). The guide shaft (210) is disposed on the base (100) and has a steel pipe guide hole (211) for a steel pipe to pass through. The rotating frame (220) is rotatably disposed on the outer periphery of the guide shaft (210) about the hole axis of the steel pipe guide hole (211). The cutting head (230) is movably disposed on the rotating frame (220) along the radial direction of the steel pipe guide hole (211). The cutting head (230) rotates synchronously with the rotating frame (220). The cutting head (230) is located at one end of the steel pipe guide hole (211), and the feed rate of the cutting head (230) is less than the thickness of the steel pipe. A feed drive mechanism (300) is disposed on the base (100) and can drive the cutting head (230) to move radially along the guide hole (211) of the steel pipe; A rotary drive mechanism (400) is disposed on the base (100) and is used to drive the rotating frame (220) to rotate; Two steel pipe clamping assemblies (500) are disposed on the base (100) and arranged along the hole axis of the steel pipe guide hole (211). The cutting assembly (200) is located between the two steel pipe clamping assemblies (500). At least one of the steel pipe clamping assemblies (500) is movable relative to the base (100) along the hole axis of the steel pipe guide hole (211). The steel pipe clamping assembly (500) can clamp or release the steel pipe. A pull-off actuator (600) is disposed on the base (100) and is capable of driving the two steel pipe clamping assemblies (500) to move closer or further apart from each other.

2. The steel pipe cutting device according to claim 1, characterized in that: The steel pipe clamping assembly (500) includes a mounting base (510), a clamping driver (520), and a pair of clamping bodies (530). The mounting base (510) is disposed on the base (100), the two clamping bodies (530) are opposite to each other, at least one of the clamping bodies (530) is movably disposed on the mounting base (510), and a steel pipe clamping position is formed between the pair of clamping bodies (530). The clamping driver (520) is disposed on the mounting base (510) and is used to drive the two clamping bodies (530) to move closer to or further away from each other.

3. The steel pipe cutting device according to claim 2, characterized in that: The clamping body (530) is provided with a receiving groove (531) along the hole axis direction of the steel pipe guide hole (211). The cross-section of the receiving groove (531) is semi-circular. The openings of the receiving grooves (531) of the two clamping bodies (530) are opposite to each other, and the receiving grooves (531) of the two clamping bodies (530) form the steel pipe clamping position.

4. The steel pipe cutting device according to claim 3, characterized in that: The clamping body (530) is provided with at least two receiving slots (531), all of which are parallel to each other.

5. The steel pipe cutting device according to claim 1, characterized in that: The cutting assembly (200) further includes a support roller (240), which is rotatably mounted on the rotating frame (220). The rotation axis of the support roller (240) relative to the rotating frame (220) is parallel to the hole axis of the steel pipe guide hole (211). The support roller (240) is radially movable along the steel pipe guide hole (211). The support roller (240) and the cutting head (230) are evenly arranged around the hole axis of the steel pipe guide hole (211). The feed drive mechanism (300) can drive the support roller (240) and the cutting head (230) to move synchronously along the radial direction of the steel pipe guide hole (211).

6. The steel pipe cutting device according to claim 1, characterized in that: The rotating frame (220) includes a frame body (221), a transmission cylinder (222), and a sliding member (223). The frame body (221) is rotatably connected to the outer periphery of the guide shaft (210) around the hole axis of the steel pipe guide hole (211). The transmission cylinder (222) is slidably disposed on the outer periphery of the frame body (221) along the hole axis of the steel pipe guide hole (211). The sliding member (223) is slidably connected to the frame body (221) along the radial direction of the steel pipe guide hole (211). The sliding member (223) rotates synchronously with the frame body (221). The sliding member (223) is provided with an inclined top surface (2231), and the transmission cylinder (222) is provided with an inclined top mating surface. The feed drive mechanism (300) includes a linear drive structure and an elastic reset member. The linear drive structure is used to drive the transmission cylinder (222) to move along the hole axis of the steel pipe guide hole (211). When the transmission cylinder (222) moves forward, it can push and cooperate with the inclined top surface (2231) through the inclined top mating surface to drive the sliding member (223) to move closer to the hole axis of the steel pipe guide hole (211). The elastic reset member is disposed between the sliding member (223) and the frame body (221) and can apply a force to make the sliding member (223) move away from the hole axis of the steel pipe guide hole (211). The cutting head (230) is mounted on the sliding member (223).

7. The steel pipe cutting device according to claim 6, characterized in that: The rotating frame (220) is provided with at least two sliding members (223). All the sliding members (223) are evenly arranged around the hole axis of the steel pipe guide hole (211). The cutting head (230) is installed on one of the sliding members (223). The remaining sliding members (223) are rotatably provided with support wheels (240). The rotation axis of the support wheels (240) is parallel to the hole axis of the steel pipe guide hole (211).

8. The steel pipe cutting device according to claim 6, characterized in that: The outer periphery of the transmission cylinder (222) is provided with an annular groove (2221), which surrounds the hole axis of the steel pipe guide hole (211). The linear drive structure includes a linear driver (310), a pusher frame (320), and a pusher wheel (330). The pusher wheel (330) is pivotally connected to the pusher frame (320). The rotation axis of the pusher wheel (330) is perpendicular to the hole axis of the steel pipe guide hole (211). The pusher wheel (330) is located in the annular groove (2221). The pusher frame (320) is movably disposed on the base (100) along the hole axis of the steel pipe guide hole (211). The linear driver (310) is used to drive the pusher frame (320) to move.

9. The steel pipe cutting device according to claim 2, characterized in that: The cutting assembly (200) is provided in an even number, and the steel pipe clamping assembly (500) is provided with at least one pair of clamping bodies (530), each pair of clamping bodies (530) corresponding to two cutting assemblies (200).

10. A hairpin tube forming machine, characterized in that, Includes the steel pipe cutting device according to any one of claims 1 to 9.

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