Automatic expansion device for metal pipe

Abstract

The utility model discloses an automatic metal tube expanding device, which aims to improve the automation degree and efficiency of metal tube expanding processing. The device comprises a frame, a feeding frame, a workbench, a material shifting bar, a bracket and a discharging rack. The feeding frame is fixed to the rear side of the frame, and is equipped with a conveying inclined surface and a material detection sensor for conveying and monitoring the metal tube to be processed. The workbench is provided with a processing station for accommodating the metal tube. The material shifting bar is installed on the frame and can be moved up and down, and is responsible for sending the metal tubes into the processing station one by one. A mounting plate that can be moved forward and backward is installed on the bracket, and an adsorption plate that can be moved up and down is installed on the plate, and is used to fix the metal tube during the expanding processing. The hole expanding mechanism is installed on the bracket, and executes the expanding process of the metal tube. The discharging rack is located at the front side of the frame, and is used to collect the processed metal tube. The device significantly improves production efficiency and processing accuracy, while reducing labor intensity, and is suitable for the expanding processing needs of metal tubes of various specifications.

Description

Technical Field

[0001] The utility model relates to a expanding device, in particular to an automatic expanding device for a metal pipe. Background Art

[0002] In today's metal pipe manufacturing field, with the accelerated pace of industrialization and the increasing diversification of market demand, the automatic flaring technology of metal pipes is particularly important. This technology is an indispensable part of the pipeline connection and assembly process. It directly affects the sealing, stability and ultimate service life of the pipeline system. Although the current metal pipe flaring technology has made certain progress in the degree of automation, as shown in the metal pipe flaring device disclosed in CN202021294882.4, the device is configured with a drive motor, an flaring head, a stabilizer, a linear slide rail and a pipe clamp. The design focuses on improving the flaring efficiency and quality, equipment stability, ease of operation and good heat dissipation performance, which brings efficiency and convenience to metal pipe processing.

[0003] However, after an in-depth analysis of the actual application of the above-mentioned device, we found that there are several challenges to be solved. First, the above-mentioned device faces the problem of insufficient adaptability and flexibility. When processing metal pipes of different specifications and materials, due to the relatively simple clamping and fixing mechanism, the equipment is often difficult to quickly adapt to the diverse production needs, limiting its versatility and flexibility; in addition, the degree of automation in the material feeding process is relatively low. After the expansion operation is completed, manual intervention is still required in many cases, which not only reduces the automation level of the production line, but also increases labor costs and safety hazards; finally, the lack of intelligent monitoring is another major limitation of the existing technology. The lack of an effective monitoring system cannot respond to changes in production status in real time, which to a certain extent affects the improvement of production efficiency and product quality.

[0004] In summary, the current automatic expansion technology of metal tubes urgently needs to achieve technological breakthroughs in intelligent material handling, equipment adaptability, fully automated processes, and intelligent monitoring. Faced with increasingly high production standards and diversified product demands, the market and the industry are eager for a more efficient, flexible, and intelligent solution to meet the above demands. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problems and provide an automatic metal pipe expanding device, which significantly improves production efficiency and processing accuracy while reducing labor intensity, and is suitable for the expanding processing needs of metal pipes of various specifications.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an automatic metal tube expanding device, comprising a frame, and also comprising a feeding frame fixed to the rear side of the frame, the feeding frame is provided with a conveying inclined surface for conveying the metal tubes to be processed one by one, and the feeding frame is also provided with a material detection sensor for real-time monitoring of the existence status of the metal tube;

[0007] A workbench, fixed on the frame, wherein the workbench is provided with a processing station for accommodating the metal pipe;

[0008] A material transfer bar, which can be moved up and down and is arranged on the frame and is located between the conveying slope and the processing station, and is used to transfer the metal pipes to be processed from the conveying slope to the processing station one by one;

[0009] A bracket, fixed on the frame, the bracket is provided with a mounting plate that can move forward and backward, and the mounting plate is provided with an adsorption plate that can move up and down;

[0010] A hole expanding mechanism, arranged on the bracket, for performing a hole expanding process on the metal pipe located in the processing station;

[0011] The discharging rack is fixed on the front side of the frame and is used for receiving the processed metal pipes transferred by the adsorption plate.

[0012] Preferably, the bracket is provided with push cylinders distributed front and back, a base is fixed to the upper end of the mounting plate, a piston rod of the push cylinder is fixed to the base, and a guide assembly is provided between the mounting plate and the bracket.

[0013] Preferably, the guide assembly includes two guide rods which are arranged on the bracket at intervals on the left and right, and each of the guide rods is distributed front and back, and the mounting plate is slidably arranged between the two guide rods.

[0014] Preferably, a storage hopper for accommodating metal tubes to be processed is also fixed on the feeding rack, and the storage hopper has an upwardly open accommodating cavity, and a discharge port for only one metal tube to fall is provided at the bottom of the accommodating cavity, and the discharge port is opposite to the highest point of the conveying slope.

[0015] Preferably, an alarm is fixed on the bracket, and the material detection sensor and the alarm are electrically connected to the controller respectively.

[0016] Preferably, a lifting cylinder is fixed on the side wall of the workbench, a lifting frame is fixed on the piston rod of the lifting cylinder, the material moving bar is fixed on the top of the lifting frame, and the material moving bar has a material moving inclined surface sloping downward from back to front.

[0017] Preferably, a downward-pressing cylinder is vertically fixed on the mounting plate, a connecting plate is fixed on the piston rod of the downward-pressing cylinder, and the adsorption plate is fixed to the lower end of the connecting plate.

[0018] Preferably, a positioning plate is fixed to the upper end of the workbench, a lower arc groove is provided at the upper end of the positioning plate, an electromagnet is installed on the adsorption plate, and an upper arc groove is provided at the lower end of the adsorption plate, and the lower arc groove cooperates with the upper arc groove to form a processing station for accommodating the metal pipe.

[0019] Preferably, the reaming mechanism includes two reaming modules arranged on the left and right sides of the bracket, each of the reaming modules includes a reaming cylinder and a reaming roller, the reaming cylinder is fixed on one side of the bracket, the piston rod of the reaming cylinder is connected to the reaming roller facing the processing station, and when reaming, the two reaming rollers move toward the inside of the metal tube to expand the hole.

[0020] Preferably, the discharge rack is located in front of the workbench, and the discharge rack includes a fixed frame and a discharge plate arranged at the upper end of the fixed frame, and the discharge plate has a discharge trough for receiving the processed metal pipe, and the discharge trough is distributed downwardly from back to front.

[0021] Compared with the prior art, the advantages of the utility model are: the device optimizes the process of metal pipe processing, improves processing efficiency and accuracy, the frame as the main frame of the device, provides stable support for other components, the feeder rack located at the rear side of the frame is equipped with a conveying slope, which can guide the metal pipes to be processed to slide to the processing area one by one, and the material detection sensor installed on the feeder rack monitors the existence status of the metal pipe in real time to ensure continuous and stable feeding; the workbench is located on the frame, providing a dedicated processing station for the metal pipe, ensuring the stability and accuracy of the processing process, and the material shifting bar can move up and down It is movable and arranged between the conveying slope and the processing station, and is responsible for accurately transferring each metal tube to be processed to the processing station; the mounting plate on the bracket structure can move forward and backward, and is provided with an adsorption plate that can move up and down on the upper part. This design enables the metal tube to be stably adsorbed and smoothly transferred to the discharge area after the expansion process is completed. The reaming mechanism is directly arranged on the bracket, and it performs precise expansion process on the metal tube located in the processing station; the discharge rack is arranged on the front side of the frame, and is used to receive the processed metal tube released after the adsorption plate moves, thereby ensuring smooth output after processing.

[0022] Through the coordinated work of the above mechanisms, the entire equipment realizes a fully automated process from automatic transportation, precise positioning, efficient expansion to final unloading of metal tubes, significantly improving production efficiency and product quality, while reducing manual operation costs and potential errors, and optimizing the expansion process of metal tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. It is obvious that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the utility model when the lower pressure cylinder and the mounting plate are matched;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the lifting cylinder and the lifting frame in the utility model when they cooperate;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model when the lower arc groove and the upper arc groove are connected;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the hole expansion module in the utility model;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the discharging rack in the utility model;

[0030] Figure 7 It is a principle block diagram of the circuit part in the utility model;

[0031] In the figure, 1, frame; 2, feeding rack; 3, conveying slope; 4, material detection sensor; 5, workbench; 6, processing station; 7, material shifting bar; 8, bracket; 9, mounting plate; 10, adsorption plate; 11, hole expansion mechanism; 12, discharge rack; 13, push cylinder; 14, base; 15, controller; 16, guide rod; 17, storage hopper; 18, accommodating chamber; 19, discharge port; 20, alarm; 21, lifting cylinder; 22, lifting rack; 23, material shifting slope; 24, pressing cylinder; 25, connecting plate; 26, positioning plate; 27, lower arc groove; 28, electromagnet; 29, upper arc groove; 31, hole expansion module; 32, hole expansion cylinder; 33, hole expansion roller; 34, fixing frame; 35, discharge plate; 36, discharge trough. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Embodiment 1: As shown in the figure, an automatic expanding device for metal pipes includes a frame 1 and a feeding frame 2 fixed to the rear side of the frame 1. The feeding frame 2 is provided with a conveying inclined surface 3 for conveying the metal pipes to be processed one by one. The feeding frame 2 is also provided with a material detection sensor 4 for real-time monitoring of the existence status of the metal pipes;

[0034] A workbench 5 is fixed on the frame 1, and a processing station 6 for accommodating the metal pipe is provided on the workbench 5;

[0035] The material transfer bar 7 is movably arranged on the frame 1 and is located between the conveying inclined plane 3 and the processing station 6, and is used to transfer the metal pipes to be processed from the conveying inclined plane 3 to the processing station 6 one by one;

[0036] A bracket 8 is fixed on the frame 1, and a mounting plate 9 that can move forward and backward is provided on the bracket 8, and an adsorption plate 10 that can move up and down is provided on the mounting plate 9;

[0037] The expansion mechanism 11 is arranged on the bracket 8 and is used to perform the expansion process on the metal pipe located in the processing station 6;

[0038] The discharging rack 12 is fixed to the front side of the frame 1 and is used to receive the processed metal pipes transferred by the adsorption plate 10 .

[0039] The working process of the automatic metal tube expanding device includes four stages: material preparation and transportation, metal tube transfer, expanding processing and metal tube output. The entire working process realizes the automation of the process from automatic transportation, positioning, expanding processing to the final unloading of metal tubes, which greatly improves the processing efficiency and accuracy, reduces the need for manual operation, and improves the overall automation level of the production line.

[0040] The material preparation and conveying process is as follows: the metal tubes to be processed are first placed on the feed rack 2 located on the rear side of the frame 1, and these metal tubes slide forward one by one through the conveying slope 3. During this process, the material detection sensor 4 placed on the feed rack 2 monitors the existence status of the metal tubes in real time to ensure that the metal tubes can be continuously and stably conveyed to the processing position.

[0041] The transfer process of the metal tube is as follows: the material transfer bar 7 is located between the conveying slope 3 and the processing station 6 and can move up and down. When the metal tube reaches the end of the conveying slope 3, the material transfer bar 7 descends to catch the metal tube to be processed. Subsequently, the material transfer bar 7 rises to accurately transfer the metal tube to the processing station 6 below.

[0042] The expansion process is: after the metal tube is moved to the processing station 6, the expansion mechanism 11 located on the bracket 8 starts to work. The bracket 8 is provided with a mounting plate 9 that can move forward and backward, and the mounting plate 9 is attached with an adsorption plate 10 that can move up and down. During the expansion process, the adsorption plate 10 stably adsorbs and fixes the metal tube located at the processing station 6, and then the expansion mechanism 11 performs precise expansion processing on the metal tube.

[0043] The output process of the metal tube is as follows: after the expansion process is completed, the adsorption plate 10 moves forward together with the processed metal tube to the top of the discharge rack 12. After reaching the specified position, the adsorption plate 10 releases the metal tube, and the metal tube immediately falls into the discharge rack 12 located on the front side of the frame 1, completing the entire expansion process.

[0044] Embodiment 2: As shown in the figure, the difference from Embodiment 1 is that a push cylinder 13 distributed front and back is provided on the bracket 8, a base 14 is fixed to the upper end of the mounting plate 9, the piston rod of the push cylinder 13 is fixed to the base 14, and a guide assembly is provided between the mounting plate 9 and the bracket 8.

[0045] In the above structure, the function of the push cylinder 13 is to provide power for the mounting plate 9 to move forward and backward, so that the mounting plate 9 can drive the adsorption plate 10 to the expansion processing position of the metal tube or move it to the discharge position. The introduction of the push cylinder 13 makes the movement process of the adsorption plate 10 fast and precise, effectively improving the overall processing efficiency and flexibility. Due to the fixed connection between the piston rod and the base 14, this ensures stability and reliability during the movement process, avoids deviation during the movement process, and ensures processing accuracy.

[0046] The guide assembly, such as the guide rod 16 or the slide rail, provided between the mounting plate 9 and the bracket 8 plays a key guiding and supporting role, ensuring the linear stability of the mounting plate 9 and its attached adsorption plate 10 during the forward and backward movement. This not only further improves the accuracy of the movement, but also minimizes the mechanical failure and processing error that may be caused by lateral deviation.

[0047] In this embodiment, the guide assembly includes two guide rods 16 arranged on the bracket 8 at intervals on the left and right, and each guide rod 16 is distributed front and back, and the mounting plate 9 is slidably arranged between the two guide rods 16.

[0048] In the above structure, two parallel guide rods 16 are used as guides to ensure that the mounting plate 9 maintains a straight path when moving forward and backward, avoiding lateral deviation or tilt, thereby improving the accuracy of the moving process, and the sliding installation makes the movement of the mounting plate 9 on the guide rods 16 smoother, reducing resistance and wear during movement. This design not only reduces the maintenance cost in long-term operation, but also improves the working efficiency and reliability of the equipment. In addition, the two guide rods 16 provide stable support and guidance, making the entire moving mechanism more resistant to external vibration and impact, further ensuring stability and safety during the processing process.

[0049] In this embodiment, a storage hopper 17 for accommodating metal tubes to be processed is also fixed on the feeding rack 2. The storage hopper 17 has an upwardly open accommodating chamber 18. The bottom of the accommodating chamber 18 is provided with a discharge port 19 for only one metal tube to fall down. The discharge port 19 is opposite to the highest point of the conveying slope 3.

[0050] In the above structure, the storage hopper 17 has an upwardly open accommodating chamber 18, and this opening design facilitates the feeding and storage of metal tubes. A discharge port 19 is designed at the bottom of the accommodating chamber 18, and the size of the discharge port 19 only allows one metal tube to pass through. The main advantage of this design is that it can accurately control the falling of the metal tube, ensuring that only a single metal tube is sent from the storage hopper 17 to the next process at a time, avoiding blockage or damage that may be caused by the simultaneous falling of multiple tubes. In addition, the discharge port 19 is precisely aligned with the highest point of the conveying slope 3, so that each falling metal tube can directly enter the conveying slope 3 and smoothly slide into the position of the processing station 6 or the material transfer strip 7, effectively reducing the friction and potential damage of the metal tube during the conveying process.

[0051] In order to improve the discharging effect, a feeding wheel can also be set in the discharging port 19. The feeding wheel can be rotatably set at the discharging port by driving a motor, and a groove for accommodating a metal tube is evenly opened on the side wall of the feeding wheel in the circumferential direction. In this way, when the feeding wheel rotates, the metal tubes can be discharged one by one.

[0052] Embodiment 3: As shown in the figure, the difference from Embodiment 2 is that an alarm 20 is fixed on the bracket 8, and the material detection sensor 4 and the alarm 20 are electrically connected to the controller 15 respectively.

[0053] In the above structure, an alarm 20 is fixed on the bracket 8, and the material detection sensor 4 and the alarm 20 are connected to the controller through wires to form an integrated monitoring system. The main working principle of this structure is that the material detection sensor 4 is responsible for real-time monitoring of the supply status of the metal pipe. Once a shortage of material is detected, the material detection sensor 4 immediately sends this information to the controller. After the controller receives the abnormal signal, it will immediately start the alarm 20, issue an alarm to prompt the operator or automatically execute the fault handling procedure. In this way, by real-time monitoring of the supply status of the metal pipe, potential problems in the production process can be discovered immediately, and respond quickly to reduce the risk of downtime and production delays. At the same time, the automatic alarm function can effectively increase the operator's attention to production anomalies, ensure that problems can be identified and solved in a timely manner, and avoid causing greater production losses.

[0054] In this embodiment, the material detection sensor 4 can adopt the E3Z-T61 model photoelectric sensor, which is suitable for accurately detecting the existence status of the material. The alarm 20 adopts the sound and light alarm 20, which can provide eye-catching visual and auditory alarm signals. The controller adopts the SIMATIC S7-1200 model PLC, which has powerful processing capabilities, flexible configuration options and convenient programming environment, and can fully meet the accuracy and reliability requirements of the metal pipe automatic expansion device for the control system.

[0055] In this embodiment, a lifting cylinder 21 is fixed on the side wall of the workbench 5, a lifting frame 22 is fixed on the piston rod of the lifting cylinder 21, a material moving bar 7 is fixed on the top of the lifting frame 22, and the material moving bar 7 has a material moving inclined surface 23 inclined downward from back to front.

[0056] In the above structure, the setting of the lifting cylinder 21 enables the material moving bar 7 to be flexibly lifted and lowered in the vertical direction. When the metal pipe needs to be transferred, the lifting cylinder 21 drives its piston rod to descend, driving the lifting frame 22 and the material moving bar 7 fixed thereon to move downward. At this time, the material moving inclined surface 23 of the material moving bar 7 contacts the metal pipe to be processed, and blocks the metal pipe during the descending process, thereby realizing the accurate reception of a single metal pipe. Subsequently, the lifting cylinder 21 drives the lifting frame 22 and the material moving bar 7 to rise, and utilizes the inclined surface of the material moving bar 7 so that the contacted metal pipe can smoothly slide into the processing station 6 located on the workbench 5. In this process, the design of the inclined surface is crucial. It utilizes gravity and the natural effect of the slope to effectively guide the metal pipe toward the predetermined processing position, ensuring that the metal pipe reaches the processing area stably, efficiently and accurately, and effectively realizes the automatic, accurate and stable transportation of the metal pipe from the storage position to the processing station 6, significantly improving the working efficiency and reliability of the automatic expanding device for metal pipes.

[0057] In this embodiment, a downward pressing cylinder 24 is vertically fixed on the mounting plate 9 , a connecting plate 25 is fixed on the piston rod of the downward pressing cylinder 24 , and the adsorption plate 10 is fixed to the lower end of the connecting plate 25 .

[0058] In the above structure, when the metal tube is positioned at the processing station 6, the downward pressure cylinder 24 is started to drive the piston rod to move downward, and the piston rod then drives the connecting plate 25 and the adsorption plate 10 at its lower end to be pressed down. The adsorption plate 10 is made of metal material and is provided with an electromagnetic adsorption device or other forms of adsorption mechanism. When the adsorption plate 10 contacts the metal tube, the adsorption force is activated to press the metal tube down firmly. In this process, the downward pressure cylinder 24 provides the necessary pressure to ensure that the adsorption plate 10 is in close contact with the metal tube, thereby achieving a good adsorption effect, avoiding displacement or misalignment of the metal tube during processing, and ensuring processing accuracy.

[0059] After the hole expansion process is completed, the downward pressure cylinder 24 installed on the mounting plate 9 controls the connecting plate 25 and the adsorption plate 10 fixed at the lower end of the connecting plate 25. When the processing is completed, the electromagnetic suction or other adsorption mechanism on the adsorption plate 10 remains activated to ensure that the metal tube and the adsorption plate 10 are tightly adhered together. Then the downward pressure cylinder 24 will drive the mounting plate 9 and the adsorption plate 10 to rise according to the control instruction. At this time, the adsorption plate 10 adsorbs the processed metal tube. Then the horizontal push cylinder 13 works to translate the adsorption plate 10 and the adsorbed metal tube to the discharge position.

[0060] After reaching the discharge position, the adsorption force on the adsorption plate 10 will be released, so that the processed metal tube can be easily detached from the adsorption plate 10 and fall into the discharge rack 12, completing the entire moving process. At this time, the device can start processing the next metal tube to achieve continuous production.

[0061] In this embodiment, a positioning plate 26 is fixed to the upper end of the workbench 5, a lower arc groove 27 is provided at the upper end of the positioning plate 26, an electromagnet 28 is installed on the adsorption plate 10, and an upper arc groove 29 is provided at the lower end of the adsorption plate 10, and the lower arc groove 27 cooperates with the upper arc groove 29 to form a processing station 6 for accommodating the metal pipe.

[0062] When the metal tube to be processed is moved to the processing position, the electromagnet 28 is activated, attracting the metal tube to make it close to the adsorption plate 10. At this time, the metal tube is located in the processing station formed by the upper arc groove 29 and the lower arc groove 27. Since the curve design of these two arc grooves closely matches the shape of the metal tube, the position of the metal tube can be very accurately limited. Both larger and smaller diameter metal tubes can be effectively positioned and fixed. The flexibility of this mechanism design enables the equipment to cope with the processing needs of metal tubes of different specifications without replacing the adsorption plate 10 or making cumbersome adjustments.

[0063] Embodiment 4: As shown in the figure, different from Embodiment 3, the reaming mechanism 11 includes two reaming modules 31 arranged on the left and right sides of the bracket 8, each reaming module 31 includes a reaming cylinder 32 and a reaming roller 33, the reaming cylinder 32 is fixed on one side of the bracket 8, and the piston rod of the reaming cylinder 32 is connected to the reaming roller 33 facing the processing station. When reaming, the two reaming rollers 33 move toward the inside of the metal tube to expand the hole.

[0064] The reaming mechanism 11 adopts a double reaming module 31 design, and the reaming cylinders 32 on both sides of the bracket 8 and the reaming rollers 33 connected to their piston rods are used to reame the inside of the metal tube, thereby achieving high balance and accuracy in the metal tube processing. This structure ensures uniform force distribution during the processing, avoids tube deformation or uneven reaming caused by uneven force, thereby improving the processing quality. At the same time, by adjusting the output force of the reaming cylinder 32, the mechanism can flexibly adapt to metal tubes of various thicknesses and diameters, thereby enhancing the scope of application and flexibility of the device.

[0065] In this embodiment, the discharge rack 12 is located in front of the workbench 5. The discharge rack 12 includes a fixed frame 34 and a discharge plate 35 arranged at the upper end of the fixed frame 34. The discharge plate 35 has a discharge trough 36 for receiving the processed metal pipe. The discharge trough 36 is distributed downwardly inclined from back to front.

[0066] The above structure has the following advantages. First, the inclined design of the discharge chute 36 utilizes gravity to allow the metal tube to slide naturally and smoothly from the processing position to the collection area, thereby reducing the need for manual operation and improving the efficiency and safety of the entire production process. Second, the inclined discharge chute 36 ensures that the metal tube has uniform acceleration during movement, avoiding damage caused by accumulation or rolling, and also facilitates subsequent collection work.

[0067] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic metal tube expanding device, comprising a frame, characterized in that: Also includes A feeding rack is fixed on the rear side of the frame, the feeding rack is provided with a conveying inclined plane for conveying the metal pipes to be processed one by one, and the feeding rack is also provided with a material detection sensor for real-time monitoring of the existence status of the metal pipes; A workbench, fixed on the frame, wherein the workbench is provided with a processing station for accommodating the metal pipe; A material transfer bar, which can be moved up and down and is arranged on the frame and is located between the conveying slope and the processing station, and is used to transfer the metal pipes to be processed from the conveying slope to the processing station one by one; A bracket, fixed on the frame, the bracket is provided with a mounting plate that can move forward and backward, and the mounting plate is provided with an adsorption plate that can move up and down; A hole expanding mechanism, arranged on the bracket, for performing a hole expanding process on the metal pipe located in the processing station; The discharging rack is fixed on the front side of the frame and is used for receiving the processed metal pipes transferred by the adsorption plate.

2. The automatic metal tube expanding device according to claim 1, characterized in that: The bracket is provided with push cylinders distributed front and back, a base is fixed to the upper end of the mounting plate, a piston rod of the push cylinder is fixed to the base, and a guide assembly is provided between the mounting plate and the bracket.

3. The automatic expanding device for metal pipes according to claim 2, characterized in that: The guide assembly comprises two guide rods which are arranged on the bracket at intervals on the left and right sides, and each guide rod is distributed front and back, and the mounting plate is slidably arranged between the two guide rods.

4. The automatic metal tube expanding device according to claim 1, characterized in that: A storage hopper for accommodating metal pipes to be processed is also fixed on the feeding rack. The storage hopper has an upwardly open accommodating cavity. The bottom of the accommodating cavity is provided with a discharge port for only one metal pipe to fall down, and the discharge port is directly opposite to the highest point of the conveying slope.

5. The automatic metal tube expanding device according to claim 1, characterized in that: An alarm is fixed on the bracket, and the material detection sensor and the alarm are electrically connected to the controller respectively.

6. The automatic metal tube expanding device according to claim 1, characterized in that: A lifting cylinder is fixed on the side wall of the workbench, a lifting frame is fixed on the piston rod of the lifting cylinder, the material moving bar is fixed on the top of the lifting frame, and the material moving bar has a material moving inclined surface that tilts downward from back to front.

7. The automatic metal tube expanding device according to claim 2, characterized in that: A downward-pressing cylinder is vertically fixed on the mounting plate, a connecting plate is fixed on the piston rod of the downward-pressing cylinder, and the adsorption plate is fixed on the lower end of the connecting plate.

8. The automatic metal tube expanding device according to claim 1, characterized in that: A positioning plate is fixed to the upper end of the workbench, a lower arc groove is arranged on the upper end of the positioning plate, an electromagnet is installed on the adsorption plate, and an upper arc groove is arranged on the lower end of the adsorption plate, and the lower arc groove cooperates with the upper arc groove to form a processing station for accommodating the metal pipe.

9. The automatic metal tube expanding device according to claim 8, characterized in that: The reaming mechanism includes two reaming modules arranged on the left and right sides of the bracket, each of the reaming modules includes a reaming cylinder and a reaming roller, the reaming cylinder is fixed on one side of the bracket, the piston rod of the reaming cylinder is connected to the reaming roller facing the processing station, and when reaming, the two reaming rollers move toward the inside of the metal tube to reaming it.

10. The automatic metal tube expanding device according to claim 1, characterized in that: The discharging rack is located in front of the workbench, and includes a fixed frame and a discharging plate arranged at the upper end of the fixed frame. The discharging plate is provided with a discharging trough for receiving the processed metal pipe, and the discharging trough is distributed downwardly and tilted from back to front.

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