A pipe cutting and blanking device and pipe fitting blanking machine

Abstract

This utility model provides a pipe cutting and blanking device and a pipe fitting blanking machine, belonging to the field of heat exchanger manufacturing technology. The pipe cutting and blanking device includes a base, on which a movable cutting mechanism is mounted. The movable cutting mechanism includes a guide rail, a drive system, and a cutting structure. The guide rail is fixed to the base, and the cutting structure is slidably mounted on the guide rail. The drive system drives the cutting structure to move along the length of the guide rail. A support seat for supporting copper pipes is also provided on the base, located on one side of the cutting structure, and has a support hole for the copper pipe to pass through. This device can drive the cutting system to move on the base, thus enabling flexible cutting of copper pipes according to different needs. It also helps to improve the consistency of the cut copper pipe length, thereby improving the assembly accuracy of the heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger manufacturing technology, and in particular to a pipe cutting and blanking device and a pipe fitting blanking machine. Background Technology

[0002] Heat exchangers, as key equipment for heat transfer between different fluids, are widely used in energy, chemical, refrigeration, HVAC, and many other fields. Copper tubes, due to their excellent thermal conductivity, corrosion resistance, and processing performance, are an indispensable raw material in heat exchanger manufacturing. In the heat exchanger production process, the cutting and blanking of copper tubes is a fundamental and crucial step. The accuracy, efficiency, and stability of this blanking directly and significantly impact the overall performance, production cost, and even the production cycle of the heat exchanger. Currently, the blanking of copper tubes for heat exchangers mainly relies on tube blanking machines. However, in existing tube blanking machines, the cutter head is usually fixed in position, and the traction structure moves the copper tube during cutting, allowing the cutter head to cut copper tubes of different lengths. This cutting method has poor flexibility, and the length of the copper tube is difficult to control precisely, leading to inconsistent cut lengths during the cutting process. This affects the assembly accuracy of the subsequent heat exchanger and increases the scrap rate.

[0003] Therefore, it is necessary to improve the existing pipe fitting cutting machine to overcome the shortcomings of the existing technology. Utility Model Content

[0004] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide a pipe cutting and blanking device. This device can drive the cutting system to move on the base, thereby flexibly cutting copper pipes according to different needs. It also helps to improve the consistency of the cut copper pipe length, thereby improving the assembly accuracy of the heat exchanger.

[0005] A pipe cutting and feeding device includes: a base, on which a movable cutting mechanism is disposed, the movable cutting mechanism including a guide rail, a drive system and a cutting structure, the guide rail being fixed on the base, the cutting structure being slidably disposed on the guide rail, and the drive system being used to drive the cutting structure to move along the length direction of the guide rail;

[0006] The base is also provided with a support seat for supporting the copper tube. The support seat is located on one side of the cutting structure and has a support hole for the copper tube to pass through.

[0007] During use, the device can drive the cutting structure to move along the guide rail through the drive system. The cutting position can be flexibly adjusted according to the input parameters according to actual needs, so that the device can adapt to the cutting needs of copper tubes of different lengths without changing the mold or adjusting the mechanical structure, thus solving the problem of poor adaptability of traditional fixed cutter head devices.

[0008] The cutting structure moves along the length of the guide rail, facilitating positioning and ensuring consistent copper tube length. This improved consistency in copper tube length results in more uniform clearances between the copper tubes and fins / ends during the assembly of heat exchangers such as air conditioner condensers and evaporators. This reduces assembly jamming or poor sealing caused by dimensional deviations, thus increasing the assembly pass rate.

[0009] In a preferred embodiment of this utility model, two mobile cutting mechanisms are provided on the base, and each mobile cutting mechanism includes an independent guide rail, a drive system, and a cutting structure.

[0010] Each of the mobile cutting mechanisms has a support base on one side.

[0011] The two sets of mobile cutting mechanisms operate independently through independent drive systems, and can process two copper tubes (of the same or different specifications) at the same time, or work independently at a single station. This avoids the time wasted in the "cutting-waiting for loading" process at a single station. Compared with a single station device, it can effectively improve the unloading efficiency and ensure the maximum automation rate of the operation.

[0012] Furthermore, the servo motor and lead screw transmission chain of each drive system are independently controlled, which can improve the cutting accuracy of the copper tubes by the two cutting mechanisms, reduce the cutting length error of the two copper tubes, solve the accuracy deviation problem caused by transmission interference in traditional dual-station linkage devices, and ensure that the length of the cut tubes is consistent.

[0013] In a preferred embodiment of this utility model, the support base includes a support base, the support base is provided with a support hole, and a sleeve is snapped into the support hole; the axial direction of the sleeve is arranged along the length direction of the guide rail.

[0014] In this embodiment, the sleeve and the bearing substrate are designed with a snap-fit ​​structure as follows: the outer wall of the sleeve is provided with an annular protrusion that matches the slot of the bearing hole. During assembly, the sleeve is pushed in along the axis of the bearing hole, and the protrusion and the slot are interference-fitted to achieve a stable connection. During disassembly, the sleeve can be removed by gently pushing the end of the sleeve with a special tool (such as a pin puller with a pin).

[0015] In a preferred embodiment of this invention, the cutting structure includes a blade holder, a cutting blade, and a driving device. The blade holder is slidably mounted on the guide rail. Both the cutting blade and the driving device are fixed on the blade holder. The cutting blade is mounted on one side of the support base. The output end of the driving device is connected to the cutting blade.

[0016] In practical applications, the drive unit (cylinder) can be directly connected to the cutting head via a floating joint. This ensures effective transmission of driving force and eliminates installation errors through floating compensation, preventing the cutting head from shifting under force, reducing burrs on copper tubes during cutting, and improving cutting quality. Each workstation's cutting structure is equipped with an independent cutting head support, cutting head, and drive unit. The cutting head support slides independently via guide rails, and with an independent drive system (servo motor, etc.), it can realize the independent start / stop, position adjustment, and cutting action of the two cutting heads, meeting the simultaneous processing needs of copper tubes of different lengths and specifications, and improving the automation rate of the operation.

[0017] In a preferred embodiment of this utility model, the base includes a base plate and a vertical frame, the vertical frame is fixed on the base plate, a guide opening is provided on the base plate, and a guide rail is provided on one side of the guide opening;

[0018] The cutter head bracket is located at the guide opening, and a slider is provided on the guide rail. The cutter head bracket is fixedly connected to the slider.

[0019] In a preferred embodiment of this utility model, the drive system includes a drive motor, a lead screw, and a mounting base. The mounting base is fixed on the cutter head bracket and is fixedly connected to the slider. A lead screw nut is provided on one side of the mounting base, and the lead screw passes through the lead screw nut and the mounting base, and the lead screw engages with the lead screw nut.

[0020] One end of the lead screw is provided with a first synchronous pulley, and the drive motor is fixed on the upright frame; the output end of the drive motor is provided with a second synchronous pulley, and the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt.

[0021] In this embodiment, the base adopts a split structure of base plate and upright. The guide port of the base plate and the guide rail form a "double guide". The cutter head bracket is constrained by both the slider (guide rail) and the guide port at the same time. The amount of swaying during movement is small, which solves the side tilting problem that may exist in single guide rail guidance, ensures the relative position of the cutting cutter head and the copper tube is stable, and reduces the cutting verticality error.

[0022] The drive system uses a transmission chain of "drive motor - second synchronous pulley - synchronous belt - first synchronous pulley - lead screw". The synchronous belt drive has no rigid impact, and the precise meshing of the lead screw and nut improves the positioning accuracy of the cutter head support. Compared with gear transmission, it reduces mechanical wear and effectively improves transmission efficiency.

[0023] In a preferred embodiment of this invention, a rangefinder is provided on the slider, and the rangefinder is positioned facing the support frame.

[0024] The rangefinder and servo motor encoder form a "dual feedback" mechanism to solve the positioning deviation problem that may be caused by mechanical transmission errors (such as synchronous belt tension and lead screw backlash) of a single encoder, thereby reducing the final positioning error of the cutter head.

[0025] By monitoring in real time with a rangefinder, the control system can dynamically correct trajectory deviations during the movement of the cutter head, avoiding positional shifts caused by sudden vibrations (such as interference from workshop equipment), and ensuring the stability of the cutting position, which is especially suitable for high-speed moving scenarios.

[0026] In a preferred embodiment of this invention, a scale is provided on one side of the guide rail, and the length direction of the scale is along the length direction of the guide rail.

[0027] Specifically, a scale (made of 304 stainless steel, 2mm thick, 20mm wide) is installed parallel to the length of the guide rail (linear guide rail fixed to the base) at each workstation. The scale is fixed to the base plate with countersunk bolts, 10mm away from the edge of the guide rail. The scale's measuring range is consistent with the length of the guide rail (e.g., 1500mm), with a minimum graduation of 0.5mm. The graduation lines are laser-engraved (0.1mm wide, 0.05mm deep), coated with matte white paint, and filled with black ink to ensure clear visibility under workshop lighting.

[0028] Even better, a red alignment pointer (made of 1mm thick acrylic, with its tip pointing towards a graduation line on the scale) is provided on the side of the cutter head support near the scale. This pointer is aligned longitudinally with the cutting center point of the cutter head, achieving precise correspondence between the cutter head position and the scale reading. During dual-station automatic unloading, the servo motor drives the cutter head support to move along the guide rail, and the alignment pointer moves synchronously with the cutter head support. The operator can observe the cutter head position in real time via the scale (e.g., the pointer points to "500.0mm") and compare it with the theoretical position displayed by the control system to quickly determine if there is any deviation in automatic positioning.

[0029] The second objective of this utility model is to provide a pipe fitting cutting machine, including a main body, on which the pipe cutting and cutting device described above is provided.

[0030] The third objective of this utility model is to provide a pipe cutting and blanking method, which includes the pipe cutting and blanking device described above.

[0031] The method includes the following steps:

[0032] Obtain the required cutting length of the copper pipe;

[0033] After the copper tube reaches the designated station, the drive cutting structure moves to the preset position;

[0034] Cut the copper tube at the preset position.

[0035] The beneficial effects of this utility model are as follows:

[0036] This utility model provides a pipe cutting and blanking device, which includes a base and a movable cutting mechanism mounted on the base. The movable cutting mechanism includes a guide rail, a drive system, and a cutting structure. The guide rail is fixed to the base, and the cutting structure is slidably mounted on the guide rail. The drive system drives the cutting structure to move along the length direction of the guide rail. A support seat for supporting a copper pipe is also provided on the base, located on one side of the cutting structure. The support seat has a support hole for the copper pipe to pass through. In use, according to the diameter of the copper pipe to be cut, a suitable support hole is selected on the support seat, and one end of the copper pipe is passed through the support hole, so that the end of the copper pipe to be cut extends beyond the support seat by a preset length. Then, the cutting length parameter is set by the control system, and the drive system drives the cutting structure to move along the guide rail towards the copper pipe to the target position to cut the pipe. This device adjusts the movement distance of the cutting structure through the control system, which can quickly adapt to the cutting needs of copper tubes of different lengths. With the stable support of the bearing seat for the copper tube, it can reduce the cutting length deviation of the copper tube, thereby solving the problem of length difference caused by inaccurate positioning in traditional devices and significantly improving the assembly accuracy of the heat exchanger.

[0037] This application also provides a pipe cutting machine including the above-mentioned pipe cutting and blanking device. The pipe cutting machine can flexibly cut the pipe according to actual needs, and can improve the cutting accuracy of the pipe and reduce cutting errors, thereby improving the assembly quality of the heat exchanger. Attached Figure Description

[0038] Figure 1 This is a perspective view of the pipe cutting and blanking device provided in the embodiments of this utility model;

[0039] Figure 2 This is an exploded view of the pipe cutting and feeding device provided in the embodiments of this utility model;

[0040] Figure 3 This is a top view of the pipe cutting and blanking device provided in the embodiments of this utility model, excluding the drive motor;

[0041] Figure 4 This is a schematic diagram of the scale provided in an embodiment of the present invention being set on the base plate;

[0042] Figure 5 This is a schematic diagram of the cutting structure provided in an embodiment of this utility model;

[0043] Figure 6 This is a flowchart of the pipe cutting and blanking method provided in the embodiments of this utility model.

[0044] Figure label:

[0045] 1. Base; 11. Base plate; 111. Guide opening; 112. Scale; 12. Stand; 2. Cutting structure; 21. Blade holder; 22. Drive device; 23. Cutting blade; 3. Drive motor; 31. Second synchronous pulley; 4. First synchronous pulley; 41. Lead screw; 42. Mounting base; 43. Lead screw nut; 5. Guide rail; 51. Slider; Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0047] Heat exchangers, as key equipment for heat transfer between different fluids, are widely used in energy, chemical, refrigeration, HVAC, and many other fields. Copper tubes, due to their excellent thermal conductivity, corrosion resistance, and processing performance, are an indispensable raw material in heat exchanger manufacturing. In the heat exchanger production process, the cutting and blanking of copper tubes is a fundamental and crucial step. The accuracy, efficiency, and stability of this blanking directly and significantly impact the overall performance, production cost, and even the production cycle of the heat exchanger. Currently, the blanking of copper tubes for heat exchangers mainly relies on tube blanking machines. However, in existing tube blanking machines, the cutter head is usually fixed in position, and the traction structure moves the copper tube during cutting, allowing the cutter head to cut copper tubes of different lengths. This cutting method has poor flexibility, and the length of the copper tube is difficult to control precisely, leading to inconsistent cut lengths during the cutting process. This affects the assembly accuracy of the subsequent heat exchanger and increases the scrap rate.

[0048] Based on this, this application provides a pipe cutting and unloading device.

[0049] Example 1

[0050] like Figures 1-5 As shown in the figure, this embodiment provides a pipe cutting and blanking device, which includes a base 1. A movable cutting mechanism is provided on the base 1. The movable cutting mechanism includes a guide rail 5, a drive system, and a cutting structure 2. The guide rail 5 is fixed on the base 1, and the cutting structure 2 is slidably disposed on the guide rail 5. The drive system is used to drive the cutting structure 2 to move along the length direction of the guide rail 5. A support seat for supporting copper pipes is also provided on the base 1. The support seat is disposed on one side of the cutting structure 2 and has a support hole for the copper pipe to pass through.

[0051] Specifically, the base 1 is welded from high-strength alloy steel, and adjustable anchor bolts are provided at the four corners of the bottom of the base 1 for calibrating the levelness of the base 1. The guide rail 5 is fixed to one side of the top along the length of the base 1, and the movement range of the cutting structure 2 is limited at both ends of the guide rail 5 by limiting blocks. The guide rail 5 is made of bearing steel that has been quenched and hardened, with a surface roughness Ra≤0.8μm to ensure smooth sliding of the cutting structure 2.

[0052] The bottom of the cutting structure 2 is slidably connected to the guide rail 5 via a slider 51. In one embodiment, the cutting assembly consists of a high-frequency cutting motor, a carbide saw blade, and a protective cover. The saw blade is rigidly connected to the motor output shaft via a flange. The cutting structure 2 may also include a clamping assembly, which is electromagnetically driven and includes a clamping head (made of polyurethane to avoid damaging the copper pipe) and an electromagnet. The clamping head is located directly below the saw blade, and during cutting, the electromagnet drives the clamping head downward to clamp the copper pipe.

[0053] In use, the device selects a suitable bearing hole on the support base according to the diameter of the copper tube to be cut, and passes one end of the copper tube through the bearing hole, so that the end of the copper tube to be cut extends beyond the preset length of the support base. Then, the cutting length parameters are set through the control system, and the cutting structure 2 is driven by the drive system to move along the guide rail 5 towards the copper tube to the target position to cut the pipeline. The device can quickly adapt to the cutting needs of copper tubes of different lengths by adjusting the moving distance of the cutting structure 2 through the control system. With the stable support of the support base for the copper tube, the cutting length deviation of the copper tube can be reduced, thereby solving the length difference problem caused by inaccurate positioning in traditional devices and significantly improving the assembly accuracy of the heat exchanger.

[0054] Example 2

[0055] This embodiment is an improvement on embodiment 1.

[0056] like Figures 1-5 As shown, in this embodiment, two mobile cutting mechanisms are provided on the base 1, and each mobile cutting mechanism includes an independent guide rail 5, a drive system, and a cutting structure 2.

[0057] Each of the mobile cutting mechanisms has a support base on one side.

[0058] In this embodiment, two independent sets of moving cutting mechanisms are arranged in parallel on the base 1, and the structure of each set is consistent with the specifications of the moving cutting mechanism in Embodiment 1. The drive systems of the two sets of moving cutting mechanisms are respectively connected to two independent control modules of the control system, and the cutting parameters (such as cutting length and moving speed) can be set individually to achieve independent operation or synchronous operation mode switching.

[0059] Each moving cutting mechanism has a corresponding support seat on its feed side. The two support seats have the same structure and are arranged symmetrically. Each support seat has a support hole, and the inner wall of the hole is inlaid with a polytetrafluoroethylene wear-resistant sleeve.

[0060] In this embodiment, the worker inserts copper tubes of the corresponding specifications through the matching bearing holes of the left and right bearing seats respectively, with the front ends of the two copper tubes extending out by a preset length.

[0061] Start the equipment, and the left cutting structure 2 and the right cutting structure 2 will operate independently according to the set parameters: the servo motor drives each cutting structure 2 to move to the corresponding cutting starting point, the clamping component fixes the copper tube, and the cutting motor starts to complete the cutting.

[0062] After cutting is completed, the two sets of cutting structures 2 are reset respectively, and the cut copper tubes can be removed simultaneously or sequentially to achieve parallel processing of copper tubes of different specifications.

[0063] The mobile cutting mechanism in this embodiment can also be switched to "synchronous operation mode". That is, the two stations will work synchronously with the same parameters, which is suitable for batch cutting of copper tubes of the same specification.

[0064] Example 3

[0065] This embodiment is an improvement on embodiment 2.

[0066] like Figures 1-5 As shown, in this embodiment, the support base includes a support base, the support base is provided with the support hole, and a sleeve is snapped into the support hole; the axial direction of the sleeve is arranged along the length direction of the guide rail 5.

[0067] In this embodiment, the sleeve and the bearing substrate are designed with a snap-fit ​​structure as follows: the outer wall of the sleeve is provided with an annular protrusion that matches the slot of the bearing hole. During assembly, the sleeve is pushed in along the axis of the bearing hole, and the protrusion and the slot are interference-fitted to achieve a stable connection. During disassembly, the sleeve can be removed by gently pushing the end of the sleeve with a special tool (such as a pin puller with a pin).

[0068] In this embodiment, for cutting copper tubes of different diameters, it is not necessary to replace the entire support seat; only the sleeve with the corresponding inner diameter needs to be replaced. Compared with the traditional method of reprocessing or replacing the support seat, the efficiency of specification switching is effectively improved, which is especially suitable for flexible production scenarios with small batches and multiple varieties.

[0069] The sleeve can be made of soft, wear-resistant materials such as plastic or brass. Its inner wall is smooth and has a certain degree of elasticity, which can prevent scratches, indentations or plating peeling caused by direct metal-to-metal contact when the copper tube passes through the bearing hole. This ensures that the surface roughness of the copper tube meets the heat exchanger assembly requirements and reduces subsequent cleaning and repair costs.

[0070] Example 4

[0071] This embodiment is an improvement based on any one of embodiments 1-3.

[0072] like Figures 1-5 As shown, in this embodiment, the cutting structure 2 includes a blade holder 21, a cutting blade 23, and a driving device 22. The blade holder 21 is slidably mounted on the guide rail 5. The cutting blade 23 and the driving device 22 are both fixed on the blade holder 21. The cutting blade 23 is located on one side of the support seat, and the output end of the driving device 22 is connected to the cutting blade 23.

[0073] In this embodiment, the drive unit 22 and the cutting head 23 are directly connected by a rigid coupling, reducing the power loss of traditional belt or gear drives; and avoiding cutting impact caused by transmission gaps, making the cutting head rotate more smoothly, reducing the roughness of the cutting surface, and reducing burrs at the copper tube end. In a preferred embodiment, the cutting head support 21 may also be equipped with cooling nozzles, positioned at the contact point between the cutting head 23 and the copper tube, which can be connected to an external coolant system (such as emulsion) for cooling and chip removal during the cutting process.

[0074] Working process of cutting structure 2

[0075] Taking one of the workstations as an example, its cutting process is as follows:

[0076] Once the copper tube passes through the bearing hole of the bearing seat and reaches the preset length, the copper tube retainer of the bearing seat locks the copper tube.

[0077] The drive system of this station (servo motor, synchronous pulley, lead screw 41, etc.) drives the cutter head bracket 21 to move along the guide rail 5 towards the copper tube until the cutting cutter head 23 is aligned with the cutting position (positioning is achieved through feedback from the servo motor encoder, with a position error ≤0.01mm).

[0078] The control system sends a command to the drive device 22 (cylinder) at this station, the solenoid valve is vented, the cylinder piston rod extends, and pushes the cutting head 23 to close through the floating joint to cut the copper tube (cutting time ≤ 0.3s);

[0079] After cutting is completed, the solenoid valve releases air, the piston rod retracts, and the cutting head 23 opens and resets.

[0080] The drive system drives the cutter head support 21 to retract to the initial position along the guide rail 5, waiting for the next cutting command.

[0081] In one embodiment, the copper tube retainer of this application may include a locking knob, a set screw, a clamping block, and an elastic bushing.

[0082] The locking knob is cylindrical with anti-slip texture on the outer surface. It is threaded and fits into the screw hole on the side of the bearing seat. The inner end of the knob is rigidly connected to the set screw.

[0083] The end of the set screw is connected to a clamping block (made of wear-resistant cast iron, in an arc shape, with the curvature matching the outer circle of the copper tube). An elastic rubber bushing (2mm thick, Shore hardness 60HA) is pasted on the inside of the clamping block to prevent scratching the surface of the copper tube when clamping.

[0084] Once the copper tube has passed through the bearing hole to the preset length, rotate the locking knob clockwise. The set screw will push the clamping block towards the copper tube until the elastic bushing is tightly fitted to the outer surface of the copper tube. The copper tube will be rigidly fixed by radial pressure. After cutting, rotate the knob counterclockwise. The clamping block will reset and release the copper tube, making it easier to pick up and put down the fitting.

[0085] Example 5

[0086] This embodiment is an improvement upon the previous embodiment.

[0087] like Figures 1-5 As shown, in this embodiment, the base 1 includes a base plate 11 and a support frame 12. The support frame 12 is fixed on the base plate 11. The base plate 11 is provided with a guide opening 111, and the guide rail 5 is provided on one side of the guide opening 111.

[0088] The cutter head bracket 21 is located at the guide port 111, and a slider 51 is provided on the guide rail 5. The cutter head bracket 21 is fixedly connected to the slider 51.

[0089] In this embodiment, the drive system includes a drive motor 3, a lead screw 41, and a mounting base 42. The mounting base 42 is fixed on the cutter head bracket 21 and is fixedly connected to the slider 51. A lead screw 41 nut is provided on one side of the mounting base 42. The lead screw 41 passes through the lead screw 41 nut and the mounting base 42, and the lead screw 41 engages with the lead screw 41 nut.

[0090] One end of the lead screw 41 is provided with a first synchronous pulley 4, and the drive motor 3 is fixed on the upright frame 12; the output end of the drive motor 3 is provided with a second synchronous pulley 31, and the first synchronous pulley 4 and the second synchronous pulley 31 are connected by a synchronous belt.

[0091] The bottom of the cutter head bracket 21 extends to below the guide port 111 and is rigidly connected to the slider 51 on the guide rail 5 by bolts. The connection is provided with a reinforcing rib to ensure that there is no deformation when subjected to force.

[0092] Mounting base 42 is an aluminum alloy casting, with one end fixed to the cutter head bracket 21 and the other end connected to the slider 51. A nut is embedded in one side of the mounting base 42 and engages with the lead screw 41. The end of the lead screw 41 closest to the upright 12 is connected to and fixed to the first synchronous pulley 4 via a key. The drive motor 3 itself is a servo motor, fixed to the mounting plane of the upright 12 via a motor mount. The motor output shaft is connected to the second synchronous pulley 31. The first synchronous pulley 4 and the second synchronous pulley 31 are connected by a polyurethane synchronous belt to form a reduction transmission.

[0093] In this embodiment, the copper tube cutting process is as follows: after the copper tube passes through the bearing hole of the corresponding bearing seat and is fixed, the control system sends a command to the drive motor 3 of the station.

[0094] The drive motor 3 starts, and its output shaft drives the second synchronous pulley 31 to rotate, which in turn drives the first synchronous pulley 4 and the lead screw 41 to rotate via the synchronous belt. The lead screw 41 engages with the lead screw 41 nut on the mounting base 42, converting the rotational motion into linear motion. This causes the mounting base 42, the slider 51, and the cutter head bracket 21 to move along the guide rail 5. At the same time, the bottom of the cutter head bracket 21 slides along the guide opening 111 of the base plate 11 (double guide constraint). When the cutter head bracket 21 drives the cutting head 23 to the preset cutting position (with position error ≤ 0.02mm, as fed back by the motor encoder), the drive motor 3 stops. The cutting head 23 completes the cutting under the action of the drive device 22 (cylinder). Then, the drive motor 3 reverses, causing the cutter head bracket 21 to return to the initial position along the guide rail 5 and the guide opening 111, waiting for the next instruction.

[0095] Furthermore, a rangefinder is mounted on the slider 51, and the rangefinder is positioned facing the stand 12. A laser rangefinder sensor is used, fixed to the side of the slider 51, with the measurement direction facing the reference plane of the stand 12, for real-time detection of the position of the cutter head support 21.

[0096] Furthermore, a scale 112 is provided on one side of the guide rail 5, and the length direction of the scale 112 is arranged along the length direction of the guide rail 5.

[0097] The scale 112 is made of stainless steel and is fixed on the base plate 11 on one side of the guide rail 5. The scale lines are parallel to the guide rail 5 and work with the pointer on the cutter head bracket 21 to achieve a visual position reference.

[0098] The device operates as follows:

[0099] When drive motor 3 starts, its output shaft drives the second synchronous pulley 31 to rotate.

[0100] The synchronous belt transmits power to the first synchronous pulley 4, which drives the lead screw 41 to rotate (due to the transmission ratio of 2:1, the speed of the lead screw 41 is 1 / 2 of the motor speed); the lead screw 41 meshes with the lead screw 41 nut, converting the rotational motion into the linear motion of the mounting base 42, which drives the cutter head bracket 21 and the slider 51 to move along the guide rail 5; the laser rangefinder measures the distance between the cutter head bracket 21 and the reference plane of the stand 12 in real time, and feeds the data back to the control system to form a closed-loop control; the operator can visually observe the position of the cutter head bracket 21 through the scale 112 to assist in debugging or calibration.

[0101] Example 6

[0102] This embodiment provides a pipe cutting machine, including a main body, on which a pipe cutting device as described above is provided.

[0103] The feeding machine uses a traction mechanism to guide the copper pipe to the pipe cutting and feeding device.

[0104] During operation: The pipe cutting and unloading device operates according to the set program: the cutting structure 2 moves along the guide rail 5 to the cutting position, the clamping component fixes the copper pipe, the cutting head 23 starts to complete the cutting, and at the same time the waste recycling system starts to suck up the copper shavings. The cut copper pipe is sent to the collection basket by the conveyor belt, the feeding mechanism feeds again, the cutting structure 2 resets, and the above steps are repeated until all the copper pipes in the hopper are cut, the equipment automatically stops and issues a prompt sound.

[0105] Example 7

[0106] like Figures 1-6 As shown, this embodiment provides a pipe cutting and blanking method, which is implemented using the pipe cutting and blanking device described above;

[0107] The method includes the following steps:

[0108] S100, Obtain the required cutting length of the copper tube;

[0109] In this method, the operator inputs the length parameter of the copper tube to be cut through the control system of the device. Since the device is a dual-station design, the two stations can independently receive different length requirements (for example, station A needs to cut a copper tube with a length of 300mm, and station B needs to cut a copper tube with a length of 500mm). The control system stores the parameters to the drive control module of the corresponding station, which serves as the target reference for the movement of the cutting structure 2.

[0110] S200: After the copper tube reaches the designated station, drive the cutting structure 2 to the preset position;

[0111] In this step, two copper tubes to be cut are passed through the bearing holes of the bearing seats at two different workstations, with the ends of the copper tubes extending out of the bearing seats to the initially estimated length. When the copper tubes reach the designated workstation (i.e., when the extension length is close to the preset length), the copper tube retainer locking knob on the corresponding bearing seat is rotated. The clamping block and elastic bushing are pushed radially to press the copper tubes through the set screw, thus completing the rigid fixation of the copper tubes and preventing axial movement or radial shaking during subsequent movement and cutting.

[0112] The control system sends displacement commands to the drive systems of the two workstations respectively:

[0113] The servo motor of station A starts and drives the synchronous pulley and lead screw 41 to rotate through the synchronous pulley and synchronous belt. The nut of lead screw 41 is linked with the connecting plate of cutter head bracket 21 and cutter head bracket 21, driving the cutting structure 2 to move along the guide rail 5 towards the copper tube until it reaches the preset position corresponding to the length of 300mm.

[0114] The servo motor of workstation B starts synchronously and independently, and drives its cutting structure 2 to move along its own guide rail 5 through the same transmission logic, reaching the preset position corresponding to a length of 500mm.

[0115] The movement processes of the two workstations do not interfere with each other, and the positioning accuracy of the cutting structure 2 is ensured by closed-loop control of the servo motor.

[0116] S300, Cut the copper tube at the preset position.

[0117] After the cutting structures 2 of both workstations reach the preset position, the control system sends a command to the driving device 22 (such as a cylinder) of the corresponding workstation cutting head 23 to drive the cutting head 23 to close and cut the fixed copper tube (cutting time ≤ 0.5s); if the copper tubes of the two workstations are of the same specification, they can be cut synchronously; if the specifications are different, they can be cut asynchronously and independently.

[0118] Reset and Retrieval: After cutting, the cutter head drive device 22 drives the cutter head to open and reset; the operator rotates the copper tube retainer knob counterclockwise to release the copper tube and remove the cut finished product; subsequently, the drive systems of the two stations drive the cutting structure 2 back to its initial position along the guide rail 5, waiting for the next copper tube to be loaded, and repeating the above steps. Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0119] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0120] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pipe cutting and blanking device, comprising: A base, on which a movable cutting mechanism is provided, characterized in that: The mobile cutting mechanism includes a guide rail, a drive system, and a cutting structure. The guide rail is fixed on the base, and the cutting structure is slidably mounted on the guide rail. The drive system is used to drive the cutting structure to move along the length direction of the guide rail. The base is also provided with a support seat for supporting the copper tube. The support seat is located on one side of the cutting structure and has a support hole for the copper tube to pass through.

2. The pipe cutting and feeding device according to claim 1, characterized in that: Two mobile cutting mechanisms are provided on the base, and each mobile cutting mechanism includes an independent guide rail, a drive system and a cutting structure; Each of the mobile cutting mechanisms has a support base on one side.

3. The pipe cutting and feeding device according to claim 2, characterized in that: The support base includes a support base, on which the support hole is provided, and a sleeve is engaged at the support hole; the axial direction of the sleeve is arranged along the length direction of the guide rail.

4. The pipe cutting and blanking device according to any one of claims 1-3, characterized in that: The cutting structure includes a cutter head bracket, a cutting head, and a driving device. The cutter head bracket is slidably mounted on the guide rail. The cutting head and the driving device are both fixed on the cutter head bracket. The cutting head is located on one side of the support base. The output end of the driving device is connected to the cutting head.

5. The pipe cutting and blanking device according to claim 4, characterized in that: The base includes a base plate and an upright frame. The upright frame is fixed on the base plate. A guide opening is provided on the base plate, and a guide rail is provided on one side of the guide opening. The cutter head bracket is located at the guide opening, and a slider is provided on the guide rail. The cutter head bracket is fixedly connected to the slider.

6. The pipe cutting and blanking device according to claim 5, characterized in that: The drive system includes a drive motor, a lead screw, and a mounting base. The mounting base is fixed on the cutter head bracket and is fixedly connected to the slider. A lead screw nut is provided on one side of the mounting base. The lead screw passes through the lead screw nut and the mounting base and engages with the lead screw nut. One end of the lead screw is provided with a first synchronous pulley, and the drive motor is fixed on the upright frame; the output end of the drive motor is provided with a second synchronous pulley, and the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt.

7. The pipe cutting and blanking device according to claim 5, characterized in that: A rangefinder is mounted on the slider, and the rangefinder is positioned facing the support frame.

8. The pipe cutting and blanking device according to any one of claims 1-3, characterized in that: A scale is provided on one side of the guide rail, and the length direction of the scale is set along the length direction of the guide rail.

9. A pipe fitting cutting machine, characterized in that: It includes a main body, on which a pipe cutting and feeding device as described in any one of claims 1-8 is provided.

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