Automatic length supplementing equipment for electric heating pipe shrinkage and calendaring

Abstract

The invention relates to the technical field of electric heating pipe production, discloses electric heating pipe shrinkage calendaring automatic length supplementing equipment, and aims to solve the problem that the length needs to be adjusted through additional procedures after traditional electric heating pipe shrinkage calendaring. The equipment comprises a full-automatic front-end feeding mechanism, a dynamic floating continuous detection mechanism, a discharging continuous detection mechanism and a numerical control servo system pipe shrinkage calendaring length compensation mechanism. The full-automatic front-end feeding mechanism drives a feeding belt through a transmission motor and is matched with a second-stage feeding detection driving wheel to automatically convey raw materials. The dynamic floating continuous detection mechanism measures the length of the pipe from multiple positions, and the discharging continuous detection mechanism accurately measures the length for the second time before length supplementation; the numerical control servo system contracted pipe calendaring and length-supplementing mechanism takes a servo motor as power, is driven by a cross-shaped universal transmission shaft and is matched with a length-supplementing rolling mold for precise length supplementation, the length of the equipment does not need to be adjusted by an additional process, consumables can be saved, the production efficiency is improved, dust pollution is reduced, and the mechanism is suitable for the field of electric heating pipe production.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric heating tube production, and particularly relates to an automatic lengthening equipment for electric heating tube shrinking and calendering. BACKGROUND

[0002] In the field of electric heating tube production, shrinking and calendering is a core process for determining the form and performance of products, and the process stability directly affects the product pass rate and production efficiency. In the past 30 years, the traditional shrinking and calendering process has been generally used in the industry at home and abroad, and the electric heating tube material needs to be combined with magnesium oxide powder (MgO) to form a shape before being processed by calendering. However, due to the limitation of the technical level of the industry, the uniformity of the thickness of the tube material in the production process is difficult to accurately control, the particle size and shape of the magnesium oxide powder have natural differences, and the filling density of the filling equipment is prone to local unevenness. These factors together cause the electric heating tube after shrinking and calendering to generally have a length error of 8mm-20mm, which is a common problem that has not been solved in the industry for a long time.

[0003] To eliminate the above length error, the existing technology usually adopts two subsequent processing processes, but both have significant defects. The first one is the "two-end center cutting" process, which needs to additionally increase the cutting process to cut the electric heating tube with length error to a uniform process length. This process not only produces a large amount of metal dust, causing environmental pollution in the workshop, but also wastes tube material, increasing the cost of consumables. The second one is the "second stretching" process, which stretches the short-size tube material to the standard length by stretching means. However, the compact structure of the magnesium oxide powder in the electric heating tube is easily damaged during the stretching process, causing the magnesium oxide powder to have a fault. The magnesium oxide powder is a key material for ensuring the insulation performance and heat dissipation efficiency of the electric heating tube, and the fault will directly shorten the service life of the electric heating tube and reduce the quality stability of the product.

[0004] From the production efficiency and process advancement, the existing technology also has the problems of process redundancy and low automation. Whether it is cutting or secondary stretching, an independent processing link needs to be added after the shrinking and calendering process, which prolongs the production cycle and reduces the continuous operation efficiency of the overall production line. At the same time, the traditional process relies on manual judgment and processing of the length error, lacks precise online detection and automatic adjustment mechanism, and is difficult to meet the dual demands of precision and efficiency in modern mass production. It not only increases the labor cost, but also easily affects the product consistency due to human operation errors, which restricts the technical upgrading and green production transformation of the electric heating tube industry. SUMMARY

[0005] The present application aims to solve the technical problems in the electric heating tube production process, such as the subsequent processing of the length error of the tube material after shrinking and calendering, the pollution and waste of materials caused by cutting, and the impact on the service life caused by secondary stretching. At the same time, the subsequent process is complicated, the automation degree is low, and there is also a lack of precise mechanism for direct adjustment of the shrinking and calendering link, which restricts the development of the industry.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic lengthening device for electric heating tube shrinking and calendering includes:

[0008] The CNC servo system shrinking and calendering extension mechanism is powered by a servo motor and driven by a cross universal joint drive shaft. Together with the extension rolling die, it forms the main body of the extension operation, realizing precise control of the extension process.

[0009] The CNC servo system tube shrinking and calendering extension mechanism includes an extension rolling main bed, an extension die bearing support assembly, a dynamic hydraulic cylinder extension mechanism, an extension rolling die, a servo motor and precision gearbox, a cross universal drive shaft, a continuous material feeding motor, a scale plate and adjusting screws, and a movable shaft. It integrates multiple core components to provide power, achieve transmission and precise extension, and ensure the stable operation of electric heating tube extension.

[0010] The lengthening and rolling main bed serves as the core load-bearing base of the tube shrinking and rolling lengthening mechanism in the CNC servo system. The lengthening die bearing support assembly is installed in the middle area of ​​the lengthening and rolling main bed and is symmetrically distributed on the left and right. The lengthening die bearing support assembly is equipped with a sliding slider support. The lengthening rolling die is assembled on the slider support through the spindle, forming a rolling operation component that is in direct contact with the electric heating tube.

[0011] The dynamic hydraulic cylinder extension mechanism is vertically mounted at the top of the extension die bearing support assembly. Its output end is directly connected to the slider support inside the extension die bearing support assembly, which can drive the slider support to dynamically adjust the extension rolling die up and down. This enables precise extension of the tube shrinking and calendering process without the need for additional length adjustment procedures, saving materials, improving efficiency, and reducing pollution.

[0012] As preferred options, it also includes a fully automatic front-end feeding mechanism, a dynamic floating continuous detection mechanism, and a discharge continuous detection mechanism.

[0013] The fully automatic front-end feeding mechanism automatically transports the electric heating tube raw materials to the subsequent processing station according to the set program and drives the continuous feeding belt through the transmission motor, in conjunction with the secondary feeding and inspection wheel.

[0014] The dynamic floating continuous detection mechanism consists of multiple detection assemblies distributed at different positions above the continuous feeding belt from the front, middle and rear. It accurately measures the length of the fed electric heating tube. The discharge continuous detection mechanism is located on the front side of the supplementary rolling main bed and is used to accurately measure the length of the fed tube. It can realize automatic feeding of electric heating tube raw materials and accurate length measurement in multiple stages.

[0015] Preferably, the fully automatic front-end feeding mechanism includes a drive motor fixedly installed on the bottom frame of the machine frame, a sprocket I fixedly connected to the output shaft of the drive motor, three sets of secondary feeding and inspection moving wheels arranged at equal intervals on the top frame of the machine frame, two sprockets II installed on the input shafts of the two front secondary feeding and inspection moving wheels, a double-row sprocket installed on the input shaft of the rear secondary feeding and inspection moving wheel, a connecting chain I meshing with the two sprockets II and the sprocket III on the double-row sprocket, a connecting chain II meshing with the sprocket I and the sprocket IV on the double-row sprocket, and a continuous feeding belt fitted onto the outer side of the three sets of secondary feeding and inspection moving wheels. Through the cooperation of the drive motor, multiple sets of sprockets and chains with the secondary feeding and inspection moving wheels, the continuous feeding belt can be stably driven to realize the automatic feeding of the raw materials of the electric heating tube according to the program.

[0016] As a preferred option, the bottom of the top frame of the machine is provided with two transverse beams, and three sets of mounting plates are arranged at equal intervals on the two transverse beams. The top of the mounting plates is fixed with bearing seats that are rotatably mounted at both ends of the secondary feeding and inspection wheel by bolts. The combination of transverse beams, mounting plates and bearing seats can stably support the secondary feeding and inspection wheel, ensuring its smooth rotation and the stable operation of the continuous feeding belt.

[0017] As a preferred embodiment, the dynamic floating continuous detection mechanism includes an online motion support mechanism and an online motion support detection mechanism. The online motion support mechanism includes support I and several supports II installed at the front end of the top layer frame of the machine frame. The online motion support detection mechanism includes a primary dynamic length measuring assembly located above the continuous feeding belt and installed on top of support I, and several dynamic length measuring assemblies I located above the continuous feeding belt and installed on top of support II. Relying on the online motion support mechanism and the multi-position length measuring assemblies, the length of the continuously conveyed electric heating pipe can be accurately measured.

[0018] As a preferred option, the continuous discharge detection mechanism includes a support III installed on the front side of the main bed of the lengthening rolling mill and a downstream dynamic detection assembly installed on the support III. With the help of the support III and the downstream dynamic detection assembly, the length of the pipe before entering the lengthening stage can be accurately measured, providing data support for the lengthening process.

[0019] Preferably, four sets of foot adjustment cups are provided at the four corners of the bottom of the frame for adjusting the level of the equipment. The bottom frame of the frame is equipped with a computer control cabinet, a hydraulic circuit control assembly and an oil pump assembly that provide hydraulic power. The computer control cabinet is equipped with a human-machine interface and working buttons. The left side of the frame is equipped with a baffle that covers the hydraulic circuit control assembly, oil pump assembly, drive motor, sprocket I and connecting chain II. The foot adjustment cups facilitate the leveling of the equipment. The computer control cabinet and other components meet the equipment's operation and power requirements, and the baffle can also cover key components.

[0020] As a preferred embodiment, the two ends of the cross universal drive shaft are respectively connected to the dual-axis output end of the precision gearbox and the main shaft of the extended rolling mold. The power transmission between the precision gearbox and the extended rolling mold is realized through the universal drive structure, and it can adapt to a certain angle of installation deviation.

[0021] The continuous material pulling motor is installed on the front and rear sides of the feed and discharge ends of the main bed of the extended rolling mill. The output end of the continuous material pulling motor is connected to the feed and discharge guide wheels to assist the electric heating tube in stably entering or exiting the working area of ​​the extended rolling mold.

[0022] The scale plate is embedded in the adjustment operation area on the side of the extended rolling main bed. The adjustment screw passes through the scale plate and is connected to the side positioning structure of the extended mold bearing support assembly. The lateral position of the extended mold bearing support assembly can be finely calibrated by rotating the adjustment screw in conjunction with the scale markings on the scale plate.

[0023] The movable shaft extends laterally through the central frame of the lengthening and rolling main bed, with both ends connected to the bottom sliding structure of the lengthening die bearing support assemblies on the left and right sides, respectively. This provides guiding support for the lateral fine-tuning or floating of the lengthening die bearing support assemblies, ensuring the synchronous movement of the lengthening rolling dies on both sides. The lengthening and rolling main bed provides stable load-bearing capacity. The lengthening die bearing support assembly, in conjunction with the dynamic hydraulic cylinder lengthening mechanism, can drive the lengthening rolling dies to adjust up and down for precise lengthening. A cross-shaped universal drive shaft ensures stable power transmission and accommodates installation deviations. A continuous material feeding motor assists in the stable feeding and feeding of tubing. A graduated dial and adjusting screws facilitate fine calibration, and the movable shaft ensures synchronous die movement.

[0024] Preferably, the servo motor and the precision gearbox are integrated and installed on the left and right sides of the transmission part under the main bed of the lengthening and rolling machine. The output shaft of the servo motor is rigidly connected to the input end of the precision gearbox, forming a combined unit of power input and speed reduction transmission. The two are integrated and rigidly connected to form a high-efficiency power input and speed reduction transmission unit, providing suitable power for lengthening operations.

[0025] Compared with the prior art, the technical effects and advantages of the present invention are:

[0026] This invention fundamentally revolutionizes the post-processing mode of electric heating tube shrinking and calendering, completely eliminating the traditional machining or secondary stretching processes. Through the coordinated operation of dynamic detection and automatic length compensation, the equipment can directly adjust tubes with length deviations to standard dimensions during the shrinking and calendering stage without additional processing steps. This not only avoids the waste of raw materials caused by machining but also solves the problem of magnesium oxide powder delamination caused by secondary stretching. It ensures the structural integrity and service life of the electric heating tube from the source, significantly improving product quality stability.

[0027] This invention achieves automated and precise control of the entire production process through multi-mechanism collaboration and AI algorithm empowerment. A fully automated front-end feeding mechanism ensures stable raw material delivery, while dynamic floating continuous detection and continuous discharge detection mechanisms capture pipe length data in real time. An AI algorithm simulation program quickly analyzes and issues adjustment commands, and a CNC servo system-based pipe shrinking, calendering, and lengthening mechanism precisely executes the lengthening action. Seamless integration of each stage significantly reduces manual intervention and human error, while simultaneously increasing effective output per unit time and substantially improving production efficiency.

[0028] This invention boasts significant environmental advantages and cost control capabilities. Traditional machining processes generate substantial amounts of metal dust, impacting the workshop environment and operator health. This equipment, however, eliminates the machining process by automatically replacing the machining step, removing the dust pollution source from the production flow and helping companies achieve green production. Simultaneously, reduced raw material waste, lower labor costs, and increased production efficiency collectively constitute a cost advantage, helping companies effectively control production costs and enhance market competitiveness while ensuring product quality.

[0029] The structural design and technical solution of this invention possess excellent adaptability and scalability. The modular combination of the various mechanisms ensures both overall operational coordination and facilitates subsequent parameter adjustments or mechanism optimization based on the production needs of electric heating tubes of different specifications. The application of AI algorithms and CNC servo systems enables rapid adaptation to the characteristics of different batches of raw materials, ensuring processing accuracy through dynamic adjustment of supplementary parameters. This flexibility and adaptability allow the equipment to meet the diverse production needs of the industry, providing technical support for the continuous upgrading of electric heating tube production processes. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 For the present invention Figure 1 A schematic diagram of the structure after the middle baffle is removed;

[0032] Figure 3 This is a schematic diagram of the fully automatic front-end feeding mechanism of the present invention;

[0033] Figure 4 This is a schematic diagram of the tube shrinking, rolling and lengthening mechanism of the CNC servo system of the present invention.

[0034] In the picture:

[0035] 1. Frame; 2. Bottom Frame; 3. Drive Motor; 4. Sprocket I; 5. Top Frame; 6. Secondary Feeding and Inspection Drive Wheel; 7. Sprocket II; 8. Sprocket III; 9. Connecting Chain I; 10. Sprocket IV; 11. Connecting Chain II; 12. Continuous Feeding Belt; 13. Transverse Beam; 14. Mounting Plate; 15. Bearing Housing; 16. Support I; 17. Support II; 18. Support III; 19. Primary Dynamic Length Measurement Assembly; 20. Dynamic Length Measurement Assembly I; 21. Rear Dynamic Inspection Assembly; 22. Machine Foot Adjustment Cup Pads; 23. Computer Control Cabinet; 24. Oil Circuit Control Assembly; 25. Oil Pump Assembly; 26. Human-Machine Interface; 27. Working Buttons;

[0036] 28. Extended rolling main bed; 29. ​​Extended mold bearing support assembly; 30. Dynamic hydraulic cylinder extension mechanism; 31. Extended rolling mold; 32. Servo motor; 33. Precision gearbox; 34. Universal cross drive shaft; 35. Continuous material feeding motor; 36. Scale plate; 37. Adjusting screw; 38. Movable shaft; 39. Feed and discharge guide wheels; 40. Baffle. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The following combination Figures 1 to 4 This application will be described in further detail.

[0039] This application discloses an automatic lengthening device for shrinking and calendering electric heating tubes, including a fully automatic front-end feeding mechanism, a dynamic floating continuous detection mechanism, a discharge continuous detection mechanism, and a CNC servo system shrinking and calendering lengthening mechanism.

[0040] The fully automatic front-end feeding mechanism automatically conveys the electric heating tube raw material to the subsequent processing station by driving the continuous feeding belt 12 through the transmission motor 3 according to the set program, and in conjunction with the secondary feeding and inspection wheel 6, it transports the electric heating tube raw material to the subsequent processing station.

[0041] The fully automatic front-end feeding mechanism includes a drive motor 3 fixedly installed on the bottom frame 2 of the frame 1, a sprocket I 4 fixedly connected to the output shaft of the drive motor 3, three sets of secondary feeding and inspection moving wheels 6 arranged at equal intervals on the top frame 5 of the frame 1, two sprockets II 7 installed on the input shafts of the two front secondary feeding and inspection moving wheels 6, a double-row sprocket installed on the input shaft of the rear secondary feeding and inspection moving wheel 6, a connecting chain I 9 meshing with the two sprockets II 7 and the sprocket III 8 on the double-row sprocket, a connecting chain II 11 meshing with the sprocket I 4 and the sprocket IV 10 on the double-row sprocket, and a continuous feeding belt 12 sleeved on the outer side of the three sets of secondary feeding and inspection moving wheels 6;

[0042] The bottom of the top frame 5 of the frame 1 is provided with two transverse beams 13. Three sets of mounting plates 14 are arranged at equal intervals on the two transverse beams 13. The top of the mounting plate 14 is fixed with a bearing seat 15 that is rotatably installed at both ends of the secondary feeding and inspection wheel 6 by bolts.

[0043] The drive motor 3 is fixedly mounted on the bottom frame 2 of the frame 1, serving as the power source for the entire feeding mechanism. After the drive motor 3 starts, its output shaft drives the sprocket I 4, which is fixedly connected to it, to rotate; this is the initial stage of power transmission. Engaged with sprocket I 4 via connecting chain II 11 is sprocket IV 10, one of the double-row sprockets mounted on the input shaft of a secondary feeding and inspection wheel 6 on the rear side. When sprocket I 4 rotates, under the action of connecting chain II 11, sprocket IV 10 rotates accordingly, thereby driving the input shaft of the secondary feeding and inspection wheel 6 to rotate.

[0044] Sprockets II7 are mounted on the input shafts of the two front secondary feeding and checking moving wheels 6. Sprocket III8 in the double-row sprocket system meshes with sprocket II7 via connecting chain I9. Thus, when sprocket IV10 rotates, it drives sprocket III8 via connecting chain I9, which in turn drives sprocket II7, thereby rotating the input shafts of the two front secondary feeding and checking moving wheels 6. At this point, the input shafts of all three sets of secondary feeding and checking moving wheels 6 are powered.

[0045] Three sets of secondary feeding and inspection moving wheels 6 are arranged at equal intervals on the top frame 5 of the frame 1, and the continuous feeding belt 12 is fitted on the outer side of the three sets of secondary feeding and inspection moving wheels 6. When the input shaft of the secondary feeding and inspection moving wheel 6 rotates, it drives the continuous feeding belt 12 to move by friction.

[0046] The top frame 5 of the frame 1 has two transverse beams 13 at its bottom. Three sets of mounting plates 14 are arranged at equal intervals on the two transverse beams 13. The top of the mounting plates 14 is fixed with bearing seats 15 by bolts. The bearing seats 15 are rotated and installed in conjunction with the two ends of the secondary feeding and inspection wheel 6. This structure ensures the stability and smoothness of the rotation of the secondary feeding and inspection wheel 6, so that the continuous feeding belt 12 can run smoothly, thereby stably and accurately conveying the raw materials of the electric heating tube to the subsequent processing station according to the set program.

[0047] Throughout the process, the fully automatic front-end feeding mechanism achieves the automatic conveying function of raw materials for electric heating tubes through the coordinated work of components such as drive motor 3, sprocket I 4, sprocket II 7, sprocket III 8, sprocket IV 10, connecting chain I 9, connecting chain II 11, secondary feeding and inspection wheel 6, and continuous feeding belt 12, as well as the cooperation of mounting and support structures such as bearing seat 15.

[0048] The dynamic floating continuous detection mechanism consists of multiple detection assemblies distributed at different positions from the front, middle and rear above the continuous feeding belt 12 to accurately measure the length of the fed electric heating tubes.

[0049] The dynamic floating continuous detection mechanism includes an online motion support mechanism and an online motion support detection mechanism. The online motion support mechanism includes a support I 16 and several supports II 17 installed at the front end of the top layer frame 5 of the frame 1. The online motion support detection mechanism includes a primary dynamic length measuring assembly 19 located above the continuous feed belt 12 and installed on the top of the support I 16, and several dynamic length measuring assemblies I 20 located above the continuous feed belt 12 and installed on the top of the supports II 17.

[0050] The supports I 16 and several supports II 17 installed at the front end of the top layer frame 5 of the frame 1 constitute the online motion support mechanism. These supports provide the installation foundation for the online motion support detection mechanism and can adapt to the movement of the electric heating tube on the continuous feeding belt 12, ensuring that the detection mechanism works stably during the movement of the tube.

[0051] The primary dynamic length measuring assembly 19 is located above the continuous feed belt 12 and mounted on top of the support I 16. When the raw material for the electric heating tube is conveyed forward with the continuous feed belt 12 and passes through the primary dynamic length measuring assembly 19, the assembly begins to operate. It accurately measures the displacement of the tube by sensing the initial position of the electric heating tube and combining this with parameters such as the speed and time of the continuous feed belt 12. It may also incorporate measuring elements such as an encoder to preliminarily measure the length of the electric heating tube.

[0052] Several dynamic length measuring assemblies I20 are located above the continuous feed belt 12 and mounted on top of the support II 17. These dynamic length measuring assemblies I20 are distributed at different positions at the front, middle, and rear of the continuous feed belt 12, measuring the length of the pipe from different positions as the electric heating tube continues to be conveyed. By taking multiple measurements from multiple dynamic length measuring assemblies I20, the influence of factors such as vibration and positional deviation during pipe conveying on the measurement results can be reduced. By combining multiple measurement data, the actual length of the electric heating tube can be determined more accurately.

[0053] The continuous discharge inspection mechanism is located on the front side of the extended rolling main bed 28 and is used to accurately measure the length of the pipes sent in; the continuous discharge inspection mechanism includes a support Ⅲ18 installed on the front side of the extended rolling main bed 28 and a rear dynamic inspection assembly 21 installed on the support Ⅲ18.

[0054] The continuous discharge detection mechanism is located on the front side of the lengthening and rolling main bed 28. It is used to accurately measure the length of the tube before it is lengthened by the tube shrinking and rolling lengthening mechanism of the CNC servo system. The support Ⅲ18 installed on the front side of the lengthening and rolling main bed 28 and the rear dynamic detection assembly 21 installed on the support Ⅲ18 constitute the continuous discharge detection mechanism.

[0055] The electric heating element is conveyed to the front of the extension rolling main bed 28. When it reaches the continuous discharge detection mechanism, the downstream dynamic detection assembly 21 begins operation. The downstream dynamic detection assembly 21 employs high-precision sensors or measuring devices, such as laser rangefinders and high-precision encoders. Taking the laser rangefinder as an example, it emits a laser beam that illuminates the electric heating element. By measuring the time it takes for the laser to reflect back and combining this with the speed of light, the distance between the laser beam and the surface of the electric heating element is calculated, thus accurately measuring the length of the electric heating element before extension. The equipment's control system can make corresponding extension adjustments based on the measurement results to ensure product quality.

[0056] Four sets of foot adjustment cup pads 22 are provided at the four corners of the bottom of the frame 1 for adjusting the level of the equipment. The bottom frame 2 of the frame 1 is equipped with a computer control cabinet 23, an oil circuit control assembly 24 and an oil pump assembly 25 that provide hydraulic power. The computer control cabinet 23 is equipped with a human-machine interface 26 and working buttons 27. The left side of the frame 1 is equipped with a baffle 40 that covers the oil circuit control assembly 24, the oil pump assembly 25, the drive motor 3, the sprocket I 4 and the connecting chain II 11.

[0057] The CNC servo system shrinking and rolling lengthening mechanism is powered by a servo motor 32 and driven by a cross universal drive shaft 34. Together with the lengthening rolling die 31, it forms the main body of the lengthening operation, realizing precise control of the lengthening process.

[0058] The CNC servo system tube shrinking and rolling extension mechanism includes an extension rolling main bed 28, an extension die bearing support assembly 29, a dynamic hydraulic cylinder extension mechanism 30, an extension rolling die 31, a servo motor 32 and a precision gearbox 33, a cross universal drive shaft 34, a continuous material feeding motor 35, a scale plate 36 and an adjusting screw 37, and a movable shaft 38; the front and rear side plates of the extension rolling main bed 28 are provided with guide feed holes to facilitate the entry and exit of raw materials.

[0059] The extended rolling main bed 28 serves as the core load-bearing base of the tube shrinking and rolling extension mechanism of the CNC servo system;

[0060] The extended die bearing support assembly 29 is installed in the middle area of ​​the extended rolling main bed 28 and is symmetrically distributed on the left and right. The extended die bearing support assembly 29 is equipped with a sliding slider support. The extended rolling die 31 is assembled on the slider support through the spindle, forming a rolling operation component that is in direct contact with the electric heating tube.

[0061] The dynamic hydraulic cylinder extension mechanism 30 is vertically installed at the top of the extension mold bearing support assembly 29. Its output end is directly connected to the slider support inside the extension mold bearing support assembly 29, which can drive the slider support to drive the extension rolling mold 31 to achieve dynamic up and down adjustment.

[0062] The servo motor 32 and the precision gearbox 33 are integrated and installed on the left and right sides of the lower transmission part of the extended rolling main bed 28. The output shaft of the servo motor 32 is rigidly connected to the input end of the precision gearbox 33, forming a combined unit of power input and speed reduction transmission.

[0063] The two ends of the cross universal drive shaft 34 are respectively connected to the dual-axis output end of the precision gearbox 33 and the main shaft of the extended rolling mold 31. The power transmission between the precision gearbox 33 and the extended rolling mold 31 is realized through the universal drive structure, and it can adapt to a certain angle of installation deviation.

[0064] The continuous feeding motor 35 is installed on the front and rear sides of the feed and discharge ends of the extended rolling main bed 28. The output end of the continuous feeding motor 35 is connected to the feed and discharge guide wheels 39 to assist the electric heating tube in stably entering or exiting the working area of ​​the extended rolling die 31. The rear dynamic detection assembly 21 is located above the front feed and discharge guide wheels 39.

[0065] The scale bowl 36 is embedded in the adjustment operation area on the side of the extended rolling main bed 28. The adjustment screw 37 passes through the scale bowl 36 and is connected to the side positioning structure of the extended mold bearing support assembly 29. The lateral position of the extended mold bearing support assembly 29 can be finely calibrated by rotating the adjustment screw 37 in conjunction with the scale markings of the scale bowl 36.

[0066] The movable shaft 38 is transversely inserted into the middle frame of the extended rolling main bed 28, and its two ends are respectively connected to the bottom sliding structure of the extended mold bearing support assembly 29 on the left and right sides. It provides guiding support for the transverse fine adjustment or floating of the extended mold bearing support assembly 29, and ensures the synchronous movement of the extended rolling molds 31 on both sides.

[0067] The servo motor 32 on the tube shrinking and rolling lengthening mechanism of the CNC servo system serves as the power source, and its output shaft is rigidly connected to the input end of the precision gearbox 33. The servo motor 32 has the characteristics of high precision and high response, and can accurately control the speed and torque. The precision gearbox 33 plays the role of deceleration and torque amplification, adapting the power of the servo motor 32 to provide suitable power parameters for the subsequent rolling lengthening action.

[0068] The dual-axis output end of the precision gearbox 33 is connected to the main shaft of the elongation rolling mold 31 via a universal joint drive shaft 34. The universal joint drive shaft 34 has a universal transmission structure, which can realize the power transmission between the precision gearbox 33 and the elongation rolling mold 31, and can also adapt to a certain angle of installation deviation, ensuring that the power is stably and efficiently transmitted to the elongation rolling mold 31, so that the elongation rolling mold 31 obtains precise and controllable rotational power, providing a power basis for the shrinking, rolling and elongation of the electric heating tube.

[0069] The dynamic hydraulic cylinder extension mechanism 30 is vertically mounted at the top of the extension die bearing support assembly 29, and its output end is directly connected to the slider support inside the extension die bearing support assembly 29. When it is necessary to extend the electric heating tube, the AI ​​algorithm simulation program CNC system sends instructions to the dynamic hydraulic cylinder extension mechanism 30 based on the tube length data measured by the dynamic floating continuous detection mechanism and the discharge continuous detection mechanism. The dynamic hydraulic cylinder extension mechanism 30 drives the slider support to move the extension rolling die 31 to achieve dynamic up and down adjustment, thereby changing the rolling degree of the electric heating tube by the extension rolling die 31, accurately controlling the extension length, and ensuring that the electric heating tube meets the uniform length requirements of the production process.

[0070] The scale plate 36 is embedded in the adjustment operation area on the side of the extension rolling main bed 28. The adjustment screw 37 passes through the scale plate 36 and connects to the side positioning structure of the extension die bearing support assembly 29. By rotating the adjustment screw 37 and cooperating with the scale markings on the scale plate 36, the lateral position of the extension die bearing support assembly 29 can be precisely calibrated to ensure the accurate relative position of the extension rolling die 31 and the electric heating tube, thus guaranteeing the accuracy of the rolling extension.

[0071] The movable shaft 38 is transversely inserted into the middle frame of the extended rolling bed 28, and its two ends are respectively connected to the bottom sliding structure of the extended mold bearing support assembly 29 on the left and right sides (claims). It provides guiding support for the transverse fine adjustment or floating of the extended mold bearing support assembly 29, ensuring the synchronous movement of the extended rolling molds 31 on both sides during the working process, and avoiding uneven extension or deviation of the electric heating tube due to asynchronous movement of the molds on both sides.

[0072] The continuous material pulling motor 35 is installed on the front and rear sides of the feed and discharge ends of the main bed 28 for the lengthening and rolling process, and its output end is connected to the feed and discharge guide wheels 39. During the lengthening process, the continuous material pulling motor 35 drives the feed and discharge guide wheels 39 to rotate, and the auxiliary electric heating tube stably enters or exits the working area of ​​the lengthening rolling die 31, ensuring that the electric heating tube is in a stable position during the lengthening process and further improving the accuracy of the lengthening.

[0073] Through the coordinated action of the above components, the CNC servo system tube shrinking and calendering extension mechanism uses the servo motor 32 as the power core, and with the help of transmission components such as the cross universal drive shaft 34, in conjunction with the extension rolling mold 31, and through precise adjustments in multiple dimensions such as vertical and horizontal, as well as ensuring motion synchronization, it achieves precise control of the extension process of the electric heating tube.

[0074] The computer control cabinet 23 integrates an AI algorithm simulation program. The fully automatic front-end feeding mechanism delivers the raw materials of the electric heating tube to the subsequent processing station according to the set program, providing the detection object for the subsequent dynamic floating continuous detection mechanism.

[0075] The dynamic floating continuous inspection mechanism performs real-time inspection of the raw materials fed by the front-end feeding mechanism, while the discharge continuous inspection mechanism inspects the raw materials entering the CNC servo system's tube shrinking, calendering, and lengthening mechanism. The inspection data is fed back to the AI ​​algorithm simulation program, which adjusts the feeding parameters of the front-end feeding mechanism based on the data. Simultaneously, the data is transmitted to the CNC servo system's tube shrinking, calendering, and lengthening mechanism, providing it with reference processing parameters. The CNC servo system's tube shrinking, calendering, and lengthening mechanism performs tube shrinking, calendering, and lengthening processing according to the optimized parameters provided by the AI ​​algorithm simulation program, and the processed product is then conveyed out.

[0076] The operating procedure for this automatic lengthening and calendering equipment for electric heating tube shrinking and calendering is as follows:

[0077] First, after the equipment is started, the fully automatic front-end feeding mechanism drives the continuous feeding belt 12 through the transmission motor 3, and together with the secondary feeding and inspection wheel 6, it stably transports the raw materials of the electric heating tube to the subsequent work station according to the set program.

[0078] Next, during the raw material transportation process, multiple length measuring assemblies of the dynamic floating continuous detection mechanism accurately measure the length of the pipe from different positions at the front, middle and rear, and feed the data back to the AI ​​algorithm simulation program of the computer control cabinet 23.

[0079] Subsequently, the tube is conveyed to the front of the main bed 28 of the extension rolling machine, and the continuous output detection mechanism accurately measures its length again. The data is synchronized to the AI ​​algorithm simulation program, and after comprehensive analysis, the system issues extension parameter instructions to the tube shrinking and rolling extension mechanism of the CNC servo system.

[0080] Finally, the tube shrinking, calendering and lengthening mechanism of the CNC servo system is activated. The servo motor 32 drives the lengthening rolling mold 31 to operate through the transmission components. The dynamic hydraulic cylinder lengthening mechanism 30 adjusts the mold position according to the instructions to perform precise tube shrinking, calendering and lengthening of the tube. The lengthened product is then conveyed out, completing the entire processing flow.

[0081] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic lengthening device for electric heating tube shrinking and calendering, characterized in that, include: The CNC servo system shrinking and rolling lengthening mechanism is powered by a servo motor (32) and driven by a cross universal drive shaft (34). It works in conjunction with the lengthening rolling mold (31) to form the main body of the lengthening operation, thereby achieving precise control of the lengthening process. The tube shrinking and calendering extension mechanism of the CNC servo system includes an extension rolling main bed (28), an extension die bearing support assembly (29), a dynamic hydraulic cylinder extension mechanism (30), an extension rolling die (31), a servo motor (32) and a precision gearbox (33), a cross universal drive shaft (34), a continuous material feeding motor (35), a scale plate (36) and an adjusting screw (37), and a movable shaft (38); The extended rolling main bed (28) serves as the core bearing base of the tube shrinking and rolling extension mechanism of the CNC servo system; the extended die bearing support assembly (29) is installed in the middle area of ​​the extended rolling main bed (28) and is symmetrically distributed on the left and right. The extended die bearing support assembly (29) is equipped with a sliding slider support inside. The extended rolling die (31) is assembled on the slider support through the spindle, forming a rolling operation component that directly contacts the electric heating tube. The dynamic hydraulic cylinder extension mechanism (30) is vertically installed at the top of the extension mold bearing support assembly (29). Its output end is directly connected to the slider support inside the extension mold bearing support assembly (29), which can drive the slider support to drive the extension rolling mold (31) to achieve dynamic up and down adjustment.

2. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 1, characterized in that: It also includes a fully automatic front-end feeding mechanism, a dynamic floating continuous detection mechanism, and a discharge continuous detection mechanism; The fully automatic front-end feeding mechanism automatically drives the continuous feeding belt (12) through the transmission motor (3) according to the set program, and in conjunction with the secondary feeding and inspection wheel (6), it transports the electric heating tube raw material to the subsequent processing station. The dynamic floating continuous detection mechanism consists of multiple detection assemblies and is distributed above the continuous feeding belt (12) from different positions in the front, middle and rear. It accurately measures the length of the electric heating tubes that have been fed. The discharge continuous detection mechanism is located on the front side of the supplementary rolling main bed and is used to accurately measure the length of the tubes that have been fed.

3. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 2, characterized in that: The fully automatic front-end feeding mechanism includes a drive motor (3) fixedly installed on the bottom frame (2) of the frame (1), a sprocket I (4) fixedly connected to the output shaft of the drive motor (3), three sets of secondary feeding and inspection wheels (6) arranged at equal intervals on the top frame (5) of the frame (1), two sprockets II (7) installed on the input shafts of the two secondary feeding and inspection wheels (6) on the front side, a double-row sprocket installed on the input shaft of the one secondary feeding and inspection wheel (6) on the rear side, a connecting chain I (9) meshing with the two sprockets II (7) and the sprocket III (8) on the double-row sprocket, a connecting chain II (11) meshing with the sprocket I (4) and the sprocket IV (10) on the double-row sprocket, and a continuous feeding belt (12) sleeved on the outer side of the three sets of secondary feeding and inspection wheels (6).

4. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 3, characterized in that: The bottom of the top frame (5) of the frame (1) is provided with two transverse beams (13), and three sets of mounting plates (14) are arranged at equal intervals on the two transverse beams (13). The top of the mounting plate (14) is fixed with a bearing seat (15) that is rotatably installed at both ends of the secondary feeding test wheel (6) by bolts.

5. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 3, characterized in that: The dynamic floating continuous detection mechanism includes an online motion support mechanism and an online motion support detection mechanism. The online motion support mechanism includes a support I (16) and several supports II (17) installed at the front end of the top frame (5) of the frame (1). The online motion support detection mechanism includes a primary dynamic length measuring assembly (19) located above the continuous feed belt (12) and installed on the top of the support I (16), and several dynamic length measuring assemblies I (20) located above the continuous feed belt (12) and installed on the top of the support II (17).

6. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 2, characterized in that: The continuous discharge detection mechanism includes a support Ⅲ (18) installed on the front side of the extended rolling main bed (28) and a rear dynamic detection assembly (21) installed on the support Ⅲ (18).

7. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 3, characterized in that: The bottom corners of the frame (1) are provided with four sets of machine foot adjustment cup pads (22) for adjusting the level of the equipment. The bottom frame (2) of the frame (1) is equipped with a computer control cabinet (23), an oil circuit control assembly (24) that provides hydraulic power and an oil pump assembly (25). The computer control cabinet (23) is provided with a human-machine interface (26) and working buttons (27). The left side of the frame (1) is provided with a baffle (40) that covers the oil circuit control assembly (24), the oil pump assembly (25), the drive motor (3), the sprocket I (4) and the connecting chain II (11).

8. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 7, characterized in that: The two ends of the cross universal drive shaft (34) are respectively connected to the dual-axis output end of the precision gearbox (33) and the main shaft of the extended rolling mold (31). The power transmission between the precision gearbox (33) and the extended rolling mold (31) is realized through the universal drive structure, and it can adapt to a certain angle of installation deviation. The continuous material pulling motor (35) is installed on the front and rear sides of the feed and discharge end of the main bed (28) of the extended rolling mill. The output end of the continuous material pulling motor (35) is connected to the feed and discharge guide wheel (39) to assist the electric heating tube in stably entering or exiting the working area of ​​the extended rolling mold (31). The scale plate (36) is embedded in the adjustment operation area on the side of the extended rolling main bed (28). The adjustment screw (37) passes through the scale plate (36) and is connected to the side positioning structure of the extended mold bearing support assembly (29). The lateral position of the extended mold bearing support assembly (29) can be finely calibrated by rotating the adjustment screw (37) in conjunction with the scale markings of the scale plate (36). The movable shaft (38) is transversely inserted into the middle frame of the extended rolling main bed (28), and its two ends are respectively connected to the bottom sliding structure of the extended mold bearing support assembly (29) on the left and right sides, providing guiding support for the transverse fine adjustment or floating of the extended mold bearing support assembly (29), and ensuring the synchronous movement of the extended rolling molds (31) on both sides.

9. The automatic lengthening device for electric heating tube shrinking and calendering according to claim 8, characterized in that: The servo motor (32) and the precision gearbox (33) are integrated and installed on the left and right sides of the lower transmission part of the extended rolling main bed (28). The output shaft of the servo motor (32) is rigidly connected to the input end of the precision gearbox (33) to form a combined unit of power input and speed reduction transmission.

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