Cutting device for metal pipe for refrigeration circulating pipe

Abstract

The invention relates to the technical field of metal pipe machining, in particular to a cutting device for a metal pipe for a refrigeration circulating pipe. The device comprises at least one metal pipe support and a cut-off support on the coaxial line of the metal pipe support. A cutting-off platform is installed on the cutting-off support, a pipe clamping seat is installed on the side, close to the metal pipe support, of the cutting-off platform, a rotating head for driving a metal pipe to rotate is installed on one side of the pipe clamping seat, and a laser cutting-off head is further installed on the cutting-off support. According to the metal pipe cutting-off device for the refrigeration circulating pipe, a basic supporting structure is formed by the metal pipe support and the coaxially-arranged cutting-off support, the cutting-off platform installed on the cutting-off support provides a stable working face for cutting operation, and the pipe clamping base arranged on the side, close to the metal pipe support, of the cutting-off platform can firmly fix a pipe to be machined; and a rotating head arranged on the side of the clamping base is matched to achieve circumferential rotating positioning of the pipe, and meanwhile, a laser cutting-off head arranged on the top of the cutting-off support can conduct high-precision non-contact cutting on the pipe in the clamped state.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe processing, in particular to a metal pipe cutting device for refrigeration cycle pipes. Background Art

[0002] In the field of refrigeration equipment manufacturing, precision cutting of metal pipes (such as copper pipes and stainless steel pipes) is a key process that affects the system's sealing and energy efficiency. Traditional cutting technology has the following main limitations: Mechanical cutting defects: Using circular saw blades or cutters can easily cause pipe deformation and cut burrs, requiring subsequent deburring, which affects the refrigerant circulation efficiency; Clamping and positioning issues: Existing clamping devices are mostly driven by one-way cylinders, which makes it difficult to ensure the concentricity of pipes of various specifications, resulting in skewed cutting; Insufficient automation: Manual adjustment of cutting length and angle is inefficient and difficult to adapt to mass production needs.

[0003] Although conventional laser cutting technology can improve the quality of the cut, it lacks an integrated tube rotation and synchronous clamping system, resulting in insufficient verticality of the cutting surface.

[0004] In view of the above-mentioned defects, the designer has actively carried out research and innovation in order to create a metal pipe cutting device for refrigeration cycle pipes to make it more valuable for industrial use. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a metal pipe cutting device for refrigeration cycle pipes.

[0006] The present invention provides a metal pipe cutting device for refrigeration cycle pipes, comprising at least one metal pipe support, a cutting support on the same axis as the metal pipe support; A cutting platform is installed on the cutting bracket. A pipe clamping seat is installed on the side of the cutting platform close to the metal pipe bracket. A rotating head that drives the metal pipe to rotate is installed on one side of the pipe clamping seat. A laser cutting head is also installed on the cutting bracket.

[0007] The metal pipe cutting device for refrigeration cycle pipes is composed of a metal pipe bracket and a coaxially arranged cutting bracket to form a basic support structure. The cutting platform installed on the cutting bracket provides a stable working surface for the cutting operation. The pipe clamping seat arranged near one side of the metal pipe bracket can firmly fix the pipe to be processed, and cooperate with the rotating head on the side of the clamping seat to realize circumferential rotation positioning of the pipe. At the same time, the laser cutting head configured on the top of the cutting bracket can perform high-precision contactless cutting on the pipe in the clamped state. The whole device effectively solves the problems of pipe deformation and cut burrs caused by traditional cutting methods through the synergistic effect of mechanical structure and laser technology.

[0008] Furthermore, the pipe clamping seat includes a clamping seat support plate, and the two ends of the clamping seat support plate are provided with a left bracket and a right bracket that can move synchronously inward. Two driving wheels are installed on the left bracket through the shaft, and the right bracket is provided with a driven wheel coaxial with the driving wheel.

[0009] The pipe clamping seat achieves adaptive clamping by synchronously moving the left and right brackets at both ends of the clamping seat support plate inward. The driving wheel of the left bracket and the driven wheel of the right bracket form a four-point positioning structure to ensure concentricity and stability during pipe cutting.

[0010] Furthermore, the left bracket and the right bracket are connected to the left push plate and the right push plate respectively through a telescopic cylinder, and the left bracket, the right bracket, the left push plate and the right push plate are movably connected to the clamping seat support plate by means of a slide rail slider, and two ends of the clamping seat support plate are movably installed with a bidirectional screw rod through a bearing seat, and the ends of the left push plate and the right push plate are provided with a screw sleeve that cooperates with the bidirectional screw rod, and a motor 1 is installed on the left push plate through a support plate, and the motor 1 is connected to the two driving wheels through a belt pulley, and a vertical column is fixed on the left bracket, and a tension wheel in contact with the belt is movably installed on the top of the column through an axis.

[0011] The pipe clamping device adopts an electromechanical integration design. The telescopic cylinder drives the left and right push plates to drive the bracket to move along the slide rail. The bidirectional lead screw cooperates with the threaded sleeve at the end of the push plate to achieve precise spacing adjustment. The motor drives the driving wheel on the left bracket to rotate through the belt transmission system, forming a composite clamping mechanism with pneumatic positioning, mechanical transmission and rotary drive functions, which ensures the stability of pipe clamping while meeting the process requirements of rotary cutting.

[0012] Furthermore, the rotating head is fixed on the rotating support plate through a bracket and a bearing, and a rotating shaft is installed at the tail end. The tail end of the rotating shaft is connected to the motor 2 fixed on the rotating support plate through a belt and a pulley. The tail end of the rotating shaft is installed on the rotating support plate with the bracket and the bearing. The interior of the rotating shaft is hollow and is covered with a rubber layer.

[0013] The rotating head is firmly mounted on the rotating support plate using a support structure composed of a bracket and bearings. The rotating shaft assembled at its tail end is connected to motor 2 through a belt drive system to achieve power transmission. The rotating shaft adopts a hollow structure design and is covered with a rubber layer on the inner wall to enhance the buffering performance. The entire transmission system ensures smooth operation through the coordinated installation of brackets and bearings, forming a complete set of rotary drive devices.

[0014] Furthermore, the cutting bracket is provided with a guide rod arranged in the same direction as the rotating head, the guide rod is fixed with a cylinder mounting plate by a clamp, the bottom of the cylinder mounting plate is installed with a push plate cylinder, the telescopic rod of the push plate cylinder is connected to the baffle bracket, the baffle bracket is slidably sleeved on the guide rod, a vertical limit baffle is fixed on the baffle bracket, a vertical manual screw rod 1 is installed on the cutting bracket, a horizontally arranged manual screw rod 2 is installed on the slider of the manual screw rod 1, and a laser cutting head is installed on the slider of the manual screw rod 2.

[0015] The cutting bracket adopts a modular motion mechanism design. The cylinder mounting plate is fixed to the guide rod parallel to the rotating head by a clamp. The push plate cylinder arranged at the bottom of the mounting plate drives the baffle bracket to slide along the guide rod through the telescopic rod. The baffle bracket is equipped with a vertical limit baffle for precise positioning; the bracket is also equipped with a cross slide mechanism consisting of a vertical manual screw rod 1 and a horizontal manual screw rod 2. The spatial positioning of the laser cutting head is achieved through dual-axis linkage adjustment. The entire system forms a composite cutting device integrating pneumatic propulsion and mechanical adjustment.

[0016] Furthermore, a conveying wheel is installed on the inside of one side of the metal pipe bracket through an axis, and the conveying wheel and the pipe clamping seat are located in the same straight line. A lifting cylinder is installed on the cross bar at the bottom front end of the metal pipe bracket, and the top of the lifting cylinder drives the lifting frame to move up and down along the inner wall of the metal pipe bracket. The two ends of the lifting frame are movably installed with the metal pipe bracket through sliding rails and sliders. There are "U"-shaped pipe limit frames on the upper sides of both ends of the lifting frame, and there are pipe guide frames on the outside of the pipe limit frames. The pipe guide frames are inclined, and there is a "V"-shaped slot at the bottom of the pipe guide frame, and the slot is located in the same straight line as the conveying wheel.

[0017] The metal pipe support adopts an integrated conveying and positioning system design. The conveying wheel and the pipe clamping seat are mounted on the shaft inside to maintain coaxial alignment. The bottom lifting cylinder drives the lifting frame with a slide block mechanism to achieve vertical movement. The "U"-shaped pipe limit frame and the inclined pipe guide frame configured at both ends of the lifting frame form a guiding combination. The "V"-shaped groove at the bottom of the guide frame is precisely aligned with the conveying wheel, together forming an automatic centering and positioning function module during the pipe conveying process. The entire mechanism realizes the coordinated operation of pipe conveying, lifting and positioning.

[0018] Furthermore, a material rack cylinder is movably installed on the cross bar at the rear end of the metal tube bracket through an axis and a mounting seat. The telescopic rod of the material rack cylinder is connected to the material rack through an axis and a sleeve. The material rack is a horizontally placed frame structure. The end of the material rack and the metal tube bracket are movably installed through an axis and a bearing. The upper edge of the material rack can be lower than the upper edge of the metal tube bracket. There is a pipe baffle extending upward on the rear side of the metal tube bracket.

[0019] The rear end of the metal pipe bracket adopts a pneumatic flip-type material rack mechanism. The material rack cylinder installed on the cross bar through the shaft system drives the frame-type material rack to rotate through the telescopic rod. The material rack forms a linkage structure with the bracket body through the hinged connection of the shaft and bearing. When it is placed horizontally, the upper edge can be kept lower than the reference height of the metal pipe bracket. The pipe baffle set on the rear side serves as a material anti-fall device. The whole mechanism realizes the precise angle adjustment and material receiving function of the material rack through the coordinated action of the cylinder push rod, sleeve transmission and bearing support.

[0020] By means of the above solution, the present invention has at least the following advantages: 1. Revolutionary improvement in cutting quality; The laser cutting head is combined with the pipe rotating mechanism to achieve contactless circumferential cutting, completely eliminating the pipe deformation, burrs and incision deviation problems caused by traditional mechanical cutting. The verticality and smoothness of the incision meet the high sealing requirements of the refrigeration system and avoid loss of refrigerant circulation efficiency.

[0021] 2. Adaptive high-precision clamping and positioning; The innovative four-point positioning clamping mechanism and the bidirectional screw drive the synchronous movement of the left / right bracket to ensure automatic centering of pipes of various specifications. Combined with the rotating drive wheel and the lifting limit system, the concentricity of the entire process of pipe conveying, lifting and clamping can be controlled, and the cutting accuracy is high.

[0022] 3. Full process automation integration; The pneumatic flip rack realizes automatic loading, the guide rod linked baffle mechanism accurately controls the feed length, and the cross slide manual screw adjusts the laser cutting position, greatly reducing manual intervention.

[0023] 4. Enhanced equipment reliability; The rotating shaft is embedded with a rubber layer to buffer vibration, the slide rail and slider mechanism are fully guided, and the anti-fall baffle design ensures long-term stable operation of the equipment.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate a certain embodiment of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the cutting bracket and the components mounted thereon of the present invention; Figure 3 It is a structural schematic diagram of the pipe clamping seat of the present invention; Figure 4 The present invention Figure 3 Schematic diagram from another perspective; Figure 5 Schematic diagram of the driving structure of the rotary head of the present invention; Figure 6 The present invention Figure 2 A magnified schematic diagram of area A in the middle; Figure 7 It is a structural schematic diagram of the metal tube support of the present invention; Figure 8 The present invention Figure 7 A partial enlarged schematic diagram; In the figure, 1, metal pipe bracket, 2, cutting bracket, 3, cutting platform, 4, pipe clamping seat, 5, rotating head, 6, laser cutting head, 7, clamping seat support plate, 8, left bracket, 9, right bracket, 10, driving wheel, 11, driven wheel, 12, left push plate, 13, right push plate, 14, bidirectional screw, 15, motor 1, 16, column, 17, tension wheel, 18, rotating support plate, 19, rotating shaft, 20, guide rod, 21, cylinder mounting plate, 22, push plate cylinder, 23, baffle bracket, 24, limit baffle, 25, manual screw 1, 26, manual screw 2, 27, conveying wheel, 28, lifting cylinder, 29, lifting frame, 30, pipe limit frame, 31, pipe guide frame, 32, material rack cylinder, 33, material rack, 34, pipe baffle, 35, motor 2. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0028] See also Figure 1 and Figure 2 The metal pipe cutting device for refrigeration cycle pipes constructs a rigid support frame through the metal pipe bracket 1 and the coaxial cutting bracket 2, and the cutting platform 3 provides a stable working surface. Its integrated pipe clamping seat 4 adopts a two-way synchronous clamping mechanism to ensure the fixed concentricity of the pipe, and cooperates with the rotating head 5 to drive the pipe circumferential rotation to achieve full-circle laser cutting. The laser cutting head 6 completes high-precision non-contact cutting under the control of the CNC system. The whole device significantly improves the incision quality through the synergistic effect of mechanical clamping, rotation positioning and laser cutting. Compared with traditional cutting methods, the efficiency is improved, and it is compatible with multiple materials such as copper pipes and stainless steel pipes. It is especially suitable for the refrigeration system's strict requirements for pipe end sealing.

[0029] See also Figure 3 and Figure 4 The pipe clamping seat 4 adopts a precision mechanical linkage design. Its core supporting structure is equipped with a left bracket 8 and a right bracket 9 at both ends of the clamping seat support plate 7 that can move synchronously. The left bracket forms a four-point coaxial positioning system through the dual driving wheels 10 and the driven wheel 11 of the right bracket. When working, the left and right brackets are precisely moved centripetally along the support plate through the two-way synchronous driving mechanism. The driving wheel 10 realizes the forward conveyance of the pipe under the drive of the power source. The four-point positioning ensures that the concentricity error of the pipe clamping is ≤0.02mm, and the synchronous moving mechanism avoids the deformation of the pipe caused by unilateral force. Third, the driving wheel 10 and the driven wheel 11 work together to achieve stable feeding operation, which is suitable for high-precision refrigeration copper pipe cutting process.

[0030] See also Figure 3 and Figure 4 When the pipe clamping mechanism is working, the telescopic cylinder pushes the left push plate 12 and the right push plate 13 to drive the left bracket 8 and the right bracket 9 to move synchronously along the slide rail slider system. The bidirectional screw 14 is supported by the bearing seat and cooperates with the end screw sleeves of the left push plate 12 and the right push plate 13 to achieve precise adjustment. The motor 15 drives the drive wheel 10 to rotate through the belt drive, and the tension wheel 17 automatically adjusts the belt tightness. The cylinder drive is linked with the screw 14 to achieve stable clamping. The slide rail slider ensures the movement accuracy, and the belt drive system provides stable power. The overall structure is compact and reliable, which can effectively ensure the concentricity and rotation stability of pipe processing.

[0031] See also Figure 5 The second motor 35 drives the rotating shaft 19 through a belt drive to drive the rotating head 5 to rotate smoothly. The rotating shaft 19 is fixed to the rotating support plate 18 through a bracket and a bearing to ensure operational stability. The hollow rotating shaft 19 is covered with a rubber layer to achieve shock absorption and noise reduction. The transmission system composed of the second motor 35 and the pulley runs smoothly. The inner diameter of the rubber layer covered with the rotating shaft 19 is smaller than the outer diameter of the pipe to be cut. The interference fit between the rubber layer and the pipe is used to facilitate the rotating head 5 to drive the pipe to rotate. The rubber layer where the pipe enters the rotating head 5 presents a conical guide structure, which is convenient for the insertion of the pipe.

[0032] See also Figure 6 The push plate cylinder 22 pushes the baffle bracket 23 to slide along the guide rod 20 to drive the limit baffle 24 to position. The operator can accurately adjust the three-dimensional position of the laser cutting head 6 by adjusting the manual screw rod 1 25 and the manual screw rod 2 26. The cylinder mounting plate 21 is fixed to the guide rod 20 by a clamp to ensure structural stability. The push plate cylinder 22 cooperates with the guide rod 20 to achieve rapid positioning. The manual screw rod 1 25 and the manual screw rod 2 26 system provide fine-tuning accuracy. The modularly designed limit baffle 24 and the laser cutting head 6 work together. The overall structure has strong rigidity and flexible adjustment, which is suitable for high-precision pipe cutting operations.

[0033] See also Figure 7 The lifting cylinder 28 drives the lifting frame 29 to move vertically along the slide rail slider system, driving the pipe limit frame 30 and the pipe guide frame 31 to rise and fall synchronously. The inclined pipe guide frame 31 is automatically guided through the "V"-shaped slot and the conveying wheel 27. The "U" structure ensures that the pipe can be accurately inserted into the pipe limit frame 30. The lifting cylinder 28 and the slide rail slider are combined to achieve smooth lifting. The adjustable pipe guide frame 31 and the conveying wheel 27 form a precise conveying channel. The dual positioning structure of the pipe limit frame 30 and the guide frame 31 effectively prevents the pipe from deflecting.

[0034] See also Figure 8 When the pipe material rack mechanism is working, the rack cylinder 32 drives the frame rack 33 to rotate around the shaft bearing through telescopic movement, so that the upper edge of the rack 33 can be adjusted to be lower than the metal pipe bracket 1 to form an inclined blanking surface, and the pipe baffle 34 prevents the pipe from sliding backward. Its advantages are: the driving mechanism composed of the rack cylinder 32 and the shaft sleeve runs smoothly, and the adjustable frame rack 33 cooperates with the pipe limit rack 30 to realize the automatic loading function.

[0035] When loading operation is required, Figure 7 The middle pipe is located between the pipe limiting frame 30 and the pipe baffle 34, and the lifting cylinder 28 drives the pipe limiting frame 30 to move downward so that it is located below the pipe. Then the lifting cylinder 28 drives the pipe limiting frame 30 to rise, and uses the inclined conical surface on the right side of the pipe limiting frame 30 to separate and move the pipe attached to the pipe guide frame 31 upward. The pipe follows the pipe limiting frame 30 to move upward and then slides onto the pipe guide frame 31. At this time, the gear lever on the left side of the pipe limiting frame 30 is higher than the pipe guide frame 31, which limits the position of the pipe. At this time, the lower part of the pipe contacts the pipe guide frame 31 and is stuck in the card slot of the pipe limiting frame 30. This pipe is a pipe to be processed.

[0036] Then the lifting cylinder 28 drives the pipe limit frame 30 to move downward, so that the pipe breaks away from the pipe limit frame 30 and slides into the "V"-shaped groove at the lower end of the pipe guide frame 31 by relying on the gravity of the pipe. Since the supporting fulcrum of the "V"-shaped groove for the pipe is slightly lower than the "V"-grooved conveying wheel 27, the pipe relies on inertia and the end wall of the "V"-shaped groove at the lower end of the pipe guide frame 31 to limit the sliding of the pipe and support the bottom of the conveying wheel 27, so that the pipe is automatically placed on the conveying wheel 27.

[0037] The rack cylinder 32 can drive the rack 33 to tilt, so that the pipes can be moved to a position where they fit the pipe limiting rack 30, which is convenient for subsequent cyclic loading.

[0038] The working principle of the present invention is as follows: When the metal pipe cutting device for refrigeration cycle pipes is working, the pipe is loaded on the metal pipe support 1, and then the pipe is squeezed and transported between the driving wheel 10 and the driven wheel 11 manually or by providing a tightening feeding cylinder at the rear end of the metal pipe support 1. Then, the cylinders installed on the left push plate 12 and the right push plate 13 are started to synchronously drive the driving wheel 10 and the driven wheel 11 to move inward, providing clamping force on both side walls of the pipe. The surfaces of the driving wheel 10 and the driven wheel 11 can be covered with a rubber layer with good friction performance to provide better clamping friction for the pipe. When necessary, the relative position between the left push plate 12 and the right push plate 13 can be adjusted by the turntable connected to both sides of the bidirectional screw rod 14, so as to facilitate To meet the needs of clamping and conveying pipes of different diameters, the motor 15 is then started to drive the driving wheel 10 to rotate, so that the pipe can be conveyed into the rotating head 5, and after passing through the rotating head 5, the end of the pipe contacts the vertical limit baffle 24 on the baffle bracket 23. The relative position of the limit baffle 24 can be controlled by the cylinder mounting plate 21 and the push plate cylinder 22 installed on the guide rod 20 to meet the positioning requirements of pipes of different lengths. When the cutting length of the pipe needs to be adjusted, the clamp that limits the cylinder mounting plate 21 is loosened, the cylinder mounting plate 21 is moved to the target area and then the clamp is locked to complete the position adjustment of the cylinder mounting plate 21. The distance between the position of the limit baffle 24 and the laser cutting head 6 is the length of the cut pipe.

[0039] When the pipe contacts the limit baffle 24, the motor 2 35 and the laser cutting head 6 are started. The motor 2 35 drives the rotating head 5 to rotate, and the laser cutting head 6 can perform a circumferential cutting operation on the pipe. The cut pipe naturally falls to the inclined plate installed on the cutting bracket 2, which is convenient for the pipe to be led out.

[0040] Repeat the above operations to complete the continuous feeding and fixed-distance cutting of the pipe.

[0041] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A metal pipe cutting device for a refrigeration cycle pipe, comprising at least one metal pipe support (1), characterized in that: A cut-off bracket (2) on the coaxial line of the metal tube bracket (1); A cutting platform (3) is installed on the cutting bracket (2), and a pipe clamping seat (4) is installed on the cutting platform (3) at a side close to the metal pipe bracket (1). A rotating head (5) for driving the metal pipe to rotate is installed on one side of the pipe clamping seat (4), and a laser cutting head (6) is also installed on the cutting bracket (2).

2. The metal pipe cutting device for refrigeration cycle pipes according to claim 1, characterized in that: The pipe clamping seat (4) includes a clamping seat support plate (7), and the two ends of the clamping seat support plate (7) are provided with a left bracket (8) and a right bracket (9) that can be moved synchronously inward. Two driving wheels (10) are installed on the left bracket (8) through an axis, and a driven wheel (11) coaxial with the driving wheel (10) is provided on the right bracket (9).

3. The metal pipe cutting device for refrigeration cycle pipes according to claim 2, characterized in that: The left bracket (8) and the right bracket (9) are connected to the left push plate (12) and the right push plate (13) respectively through the telescopic cylinder. The left bracket (8), the right bracket (9), the left push plate (12) and the right push plate (13) are movably connected to the clamping seat support plate (7) by means of a slide rail slider. The two ends of the clamping seat support plate (7) are movably mounted with a bidirectional screw rod (14) through a bearing seat. The ends of the left push plate (12) and the right push plate (13) have screw sleeves that cooperate with the bidirectional screw rod (14). A motor (15) is mounted on the left push plate (12) through a support plate. The motor (15) is connected to the two drive wheels (10) through a belt pulley. A vertical column (16) is fixed on the left bracket (8). The top of the column (16) is movably mounted with a tension wheel (17) that contacts the belt through an axis.

4. A metal pipe cutting device for refrigeration cycle pipes according to any one of claims 1 to 3, characterized in that: The rotating head (5) is fixed on the rotating support plate (18) through a bracket and a bearing, and a rotating shaft (19) is installed at the tail end of the rotating head (5). The tail end of the rotating shaft (19) is connected to the motor 2 (35) fixed on the rotating support plate (18) through a belt and a pulley. The tail end of the rotating shaft (19) is installed on the rotating support plate (18) with the bracket and the bearing. The interior of the rotating shaft (19) is hollow and is covered with a rubber layer.

5. A metal pipe cutting device for a refrigeration cycle pipe according to claim 4, characterized in that: A guide rod (20) is provided on the cutting bracket (2) and is arranged in the same direction as the rotating head (5). A cylinder mounting plate (21) is fixed to the guide rod (20) through a clamp. A push plate cylinder (22) is installed at the bottom of the cylinder mounting plate (21). The telescopic rod of the push plate cylinder (22) is connected to the baffle bracket (23). The baffle bracket (23) is slidably sleeved on the guide rod (20). A vertical limit baffle (24) is fixed on the baffle bracket (23). A vertical manual screw rod (25) is installed on the cutting bracket (2). A horizontally arranged manual screw rod (26) is installed on the slider of the manual screw rod (25). A laser cutting head (6) is installed on the slider of the manual screw rod (26).

6. A metal pipe cutting device for a refrigeration cycle pipe according to any one of claims 1 to 3 or 5, characterized in that: A conveying wheel (27) is installed inside one side of the metal pipe bracket (1) through an axis. The conveying wheel (27) and the pipe clamping seat (4) are located on the same straight line. A lifting cylinder (28) is installed on the cross bar at the front end of the bottom of the metal pipe bracket (1). The top of the lifting cylinder (28) drives the lifting frame (29) to move up and down along the inner wall of the metal pipe bracket (1). The two ends of the lifting frame (29) are movably installed with the metal pipe bracket (1) by means of a slide rail slider. There are "U"-shaped pipe limiting frames (30) on the upper sides of the two ends of the lifting frame (29). There are pipe guide frames (31) on the outside of the pipe limiting frame (30). The pipe guide frames (31) are inclined. There are "V"-shaped card slots at the bottom of the pipe guide frames (31). The card slots and the conveying wheel (27) are located on the same straight line.

7. A metal pipe cutting device for a refrigeration cycle pipe according to claim 6, characterized in that: A material rack cylinder (32) is movably mounted on the crossbar at the rear end of the metal tube bracket (1) through a shaft and a mounting seat. The telescopic rod of the material rack cylinder (32) is connected to the material rack (33) through a shaft and a shaft sleeve. The material rack (33) is a horizontally placed frame structure. The end of the material rack (33) is movably mounted to the metal tube bracket (1) through a shaft and a bearing. The upper edge of the material rack (33) can be lower than the upper edge of the metal tube bracket (1). The rear side of the metal tube bracket (1) has a pipe baffle (34) extending upward.

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