Equipment for PE pipe production and control method thereof
The adaptive external support module solves the support problem of irregular bending parts at the port of large-diameter PE pipe, improves the flatness and precision of the cut surface, reduces the amount of manual trimming, and lowers production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JILIN TIANZE PIPE IND CO LTD
- Filing Date
- 2026-03-17
- Publication Date
- 2026-04-17
AI Technical Summary
When cutting large-diameter pipe ends, existing PE pipe production equipment cannot effectively fit the irregularly curved parts due to the fixed rigid support components, resulting in uneven cut surfaces, affecting cutting accuracy and increasing the amount of manual trimming work.
An adaptively adjustable external support module is adopted. Data is collected in real time through pressure and displacement sensors. The control module calculates the adjustment amount of the telescopic drive source based on preset thresholds and the rotation speed of the pipe, so that the support end fits tightly against the outer wall of the pipe, achieving adaptive support.
It improves the flatness of the cut surface, reduces the generation of steps and wavy lines, improves cutting accuracy, eliminates the need for subsequent manual trimming operations, and reduces production costs.
Smart Images
Figure CN121870252A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of PE pipe production and processing equipment technology, and more specifically, to a PE pipe production equipment and its control method. Background Technology
[0002] PE pipes are widely used in municipal water supply and drainage, gas transmission, and farmland irrigation due to their advantages such as corrosion resistance, light weight, and convenient construction. However, after PE pipes are produced, irregular local bending and deformation can easily occur at the pipe ends due to handling, stacking, compression, or uneven temperature during the production cooling stage, affecting the accuracy of subsequent pipe connections.
[0003] To ensure the quality of the connection, a fine-tuning process is usually added to the existing production process. Current fine-tuning equipment mostly uses a cutting method that involves rotating the pipe and fixing the laser head, extending the pipe end in a cantilever state, and supporting the end with an external support component to prevent sagging and shaking caused by the pipe's own weight during the cutting process.
[0004] However, existing equipment typically uses fixed, rigid structures for its external support components. While this type of structure can meet the standard support requirements for cutting small and medium-diameter pipes, problems arise when dealing with large-diameter pipes. Firstly, large-diameter pipes have a greater mass and rely more heavily on support when cantilevered. Secondly, the irregular shape of their curved ends prevents the fixed, rigid support components from effectively fitting against them. To avoid interference with the curved sections, these components are often removed during actual production, resulting in complete loss of support at the curved sections during cutting. This lack of effective support leads to noticeable sagging and irregular micro-wobbling at the cut surface, causing unevenness, steps, or wavy lines, requiring additional manual trimming. This not only affects cutting accuracy and product yield but also increases production time and subsequent processing costs.
[0005] Therefore, there is an urgent need for a PE pipe production equipment to solve the problem of supporting irregularly bent parts of large-diameter pipe ends during the finishing process. Summary of the Invention
[0006] The purpose of this invention is to provide equipment and control method for PE pipe production to solve the above-mentioned technical problems.
[0007] The present invention solves the above-mentioned technical problems through the following technical solutions: In a first aspect, the present invention provides equipment for producing PE pipes, including: a frame, an external support module, a laser cutting module, a clamping module, a pushing module, and a control module; The external support module includes at least two sets of support units, each set of support units including: Support arm, fixed to the frame; The telescopic drive source, installed on the support arm, can extend and retract along a direction perpendicular to the axis of the PE pipe; The support end is installed on the telescopic end of the telescopic drive source and is used to contact and support the outer wall of the PE pipe. Pressure sensing element, used to collect real-time contact pressure between the support end and the PE pipe; Displacement sensing element, used to collect real-time data on the positional changes of the outer wall of the PE pipe relative to the support end; The control module is electrically connected to the telescopic drive source, the pressure sensing element, and the displacement sensing element, respectively, and is configured as follows: Receives real-time data collected by pressure and displacement sensors; Based on preset support pressure thresholds and displacement deviation thresholds, the support status of each support unit is determined. Based on the judgment results and the rotation speed of the PE pipe, the real-time expansion and contraction adjustment amount of each expansion and contraction drive source is calculated. The telescopic drive source is controlled to perform adaptive telescopic adjustment, so that the support end always fits against the outer wall of the PE pipe and maintains a stable support state.
[0008] Preferably, the external support module includes three sets of external support units, which are arranged in a triangular pattern below and on both sides of the PE pipe port.
[0009] Preferably, the surface of the support end is provided with a flexible rubber pad, and the pressure sensing element is embedded between the support end and the rubber pad.
[0010] Preferably, the pressure sensing element is a pressure sensor, and the displacement sensing element is a displacement sensor installed on one side of the support end.
[0011] Preferably, the telescopic drive source is a servo telescopic push rod, and the support end is detachably connected to the end of the servo telescopic push rod.
[0012] Preferably, the clamping module is located near the laser cutting module and includes a clamping unit rotatably mounted on the frame and a rotary drive unit for driving the clamping unit to rotate.
[0013] Preferably, the propulsion module includes a propulsion slide mounted on the frame and a linear drive unit for driving the propulsion slide to move linearly back and forth along the frame.
[0014] Preferably, the push slide is provided with a height-adjustable support component for supporting the end of the PE pipe.
[0015] Secondly, the present invention also provides a control method for PE pipe production equipment, applied to the aforementioned PE pipe production equipment, comprising the following steps: S100: Initialize the equipment, input the target support pressure range, displacement deviation threshold and adjustment coefficient; S200: Push the bent part of the PE pipe to the cutting station, and clamp and fix the outside of the PE pipe through the clamping module; S300: The telescopic drive source extends to make the support end fit against the outer wall of the PE pipe. Initial data is collected by pressure and displacement sensors to complete the initial support positioning. S400: The clamping module is activated to make the PE pipe rotate, the laser cutting head cuts the bending area, and pressure and displacement data are continuously collected at the same time. The control module calculates the expansion and contraction adjustment amount based on the real-time data and dynamically adjusts the position of the support end. S500: After cutting, the servo telescopic push rod is retracted and reset, the clamping module is released, the PE pipe is removed, and a finishing process is completed.
[0016] Preferably, in step S400, the formula for calculating the telescopic adjustment amount ΔL is: ΔL = k × (S i -S avg )+m×(F target -F i ); Among them, S i S represents the current displacement value. avg F is the average displacement value. i F represents the current pressure value. target Here, k and m represent the target pressure value, and k and m are the adjustment coefficients.
[0017] The beneficial effects of this invention are as follows: This invention employs an adaptively adjustable external support module. Through pressure and displacement sensors, data is collected in real time. The control module can accurately calculate the real-time expansion and contraction adjustment of the expansion drive source based on preset thresholds and the pipe's rotation speed, ensuring that the support end always fits against the outer wall of the PE pipe. This solves the support problem for irregularly bent sections of large-diameter pipes. By adopting this adaptive support method, even if there are irregular bends at the pipe ends, the support ends can fit tightly, avoiding sagging and irregular micro-wobbling of the cut part due to loss of support. This ensures the flatness of the cut surface, reduces the generation of steps and wavy lines, improves cutting accuracy, and eliminates the need for subsequent manual finishing operations. Attached Figure Description
[0018] Figure 1 This is a first-view structural schematic diagram of the overall structure of a PE pipe production equipment according to the present invention; Figure 2 This is a second-view structural schematic diagram of the overall PE pipe production equipment of the present invention; Figure 3 This is a schematic diagram of the external support module in a PE pipe production equipment according to the present invention; Figure 4 This is a side view of the overall equipment for producing PE pipes according to the present invention; Figure 5 This is a block diagram showing the relationship between the modules in a PE pipe production equipment according to the present invention; Figure 6 This is a flowchart of a control method for equipment used in the production of PE pipes according to the present invention.
[0019] In the diagram: 10, frame; 20, external support module; 201, support arm; 202, telescopic drive source; 203, support end; 204, pressure sensor; 205, displacement sensor; 30, laser cutting module; 40, clamping module; 401, clamping unit; 402, rotary drive unit; 50, propulsion module; 501, propulsion slide; 502, linear drive unit; 503, support assembly; 60, PE pipe. Detailed Implementation
[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.
[0021] Please refer to the following: Figures 1 to 6 A PE pipe production equipment includes a frame 10 and a control module. An external support module 20, a laser cutting module 30, a clamping module 40, and a pushing module 50 are sequentially arranged on the frame 10.
[0022] Among them, the frame 10 is the overall installation foundation of the equipment, which is welded from high-strength steel to ensure overall rigidity.
[0023] The laser cutting module 30 is fixedly installed on the frame 10, located above the cutting position of the PE pipe 60 port. It uses a fiber laser with adjustable power and is used to precisely cut the bending area of the PE pipe 60 port.
[0024] The clamping module 40 is located near the laser cutting module 30 and mainly includes a clamping unit 401 rotatably mounted on the frame 10 and a rotary drive unit 402 for driving the clamping unit 401 to rotate. The clamping unit 401 adopts a three-jaw chuck structure, which can stably clamp the PE pipe 60. The rotary drive unit 402 is driven by a servo motor and a reducer. The output end of the servo motor is connected to the three-jaw chuck structure through a transmission belt and a transmission wheel. The rotary drive unit 402 drives the three-jaw chuck structure to rotate, thereby driving the entire PE pipe 60 to rotate, providing stable rotational motion for laser cutting.
[0025] The propulsion module 50 includes a propulsion slide 501 slidably mounted on the frame 10 and a linear drive unit 502 for driving the propulsion slide 501 to move linearly back and forth along the frame 10. The linear drive unit 502 adopts a servo motor and ball screw structure. The propulsion slide 501 is also provided with a height-adjustable support assembly 503 for supporting the end of the PE pipe 60, which can assist in supporting the end of the PE pipe 60 during propulsion.
[0026] The external support module 20 is mounted on the frame 10, near the laser cutting module 30, located below and on both sides of the PE pipe 60 port. The external support module 20 includes three sets of support units, which are arranged in a triangular pattern below and on both sides of the PE pipe 60 port to achieve stable three-point support.
[0027] Each support unit includes: support arm 201, servo telescopic push rod, support end 203, pressure sensor and displacement sensor.
[0028] Specifically, the support arm 201 is made of high-strength aluminum alloy, and its bottom is fixed to the frame 10 with bolts. The top has a reserved installation interface to ensure support strength and prevent deformation. The servo telescopic push rod 202, as the telescopic drive source, is installed on the support arm 201, and its telescopic direction is perpendicular to the axis of the PE pipe 60.
[0029] The support end 203 is installed on the telescopic end of the servo telescopic push rod. It is made of wear-resistant rigid material and is detachably connected to the end of the servo telescopic push rod for easy maintenance and replacement.
[0030] The surface of the support end 203 is wrapped with a flexible rubber pad with a thickness of 2-4mm to prevent scratching the outer wall of the PE pipe 60.
[0031] The pressure sensor, as a pressure sensing element 204, is embedded between the support end 203 and the rubber pad to collect the contact pressure between the support end 203 and the PE pipe 60 in real time.
[0032] The displacement sensor, as a displacement sensing element 205, is installed on the side of the support end 203. Generally, a laser displacement sensor is selected, and the measurement direction is towards the outer wall of the PE pipe 60. It is used to collect the position change data of the outer wall of the PE pipe 60 relative to the support end 203 in real time.
[0033] The control module adopts a conventional industrial PLC controller, which is electrically connected to the rotary drive unit 402 of the clamping module 40, the linear drive unit 502 of the propulsion module 50, the laser cutting module 30, the servo telescopic push rod of the external support module 20, the pressure sensor and the displacement sensor, respectively, to realize the coordinated linkage of each component.
[0034] The control module incorporates a control algorithm that works in conjunction with the external support module 20 to achieve adaptive adjustment of the bent portion of the PE pipe 60, ensuring effective support for the bent portion to be cut. The specific working process is as follows: S100, Device Initialization: According to the specifications of the PE pipe 60 to be repaired, the operator inputs the relevant production parameters into the human-machine interface of the control module, such as the target support pressure range, displacement deviation threshold, and adjustment coefficient, and the system completes the initialization.
[0035] Initial installation of S200, PE pipe 60: One end of the PE pipe 60 to be cut is placed in the clamping module 40, and the other end is placed on the support component 503. The height of the support component 503 is adjusted according to the size of the PE pipe 60 to ensure that the fixed PE pipe 60 can maintain a horizontal posture. Then, the linear drive unit 502 drives the push slide 501 to move forward, pushing the PE pipe 60 to the cutting station, so that the end of the PE pipe 60 extends to the position below the laser cutting module 30, until the bent part of the PE pipe 60 is located in the support position of the support unit. The linear drive unit 502 stops driving, and then the clamping unit 401 clamps and fixes the PE pipe 60.
[0036] S300, initial support fit: Since the three support units are initially in a retracted state and do not contact the bent part of the PE pipe 60, the control module drives the three sets of servo telescopic push rods to extend, so that the support end 203 fits against the bent part of the outer wall of the PE pipe 60. The pressure sensor and displacement sensor are activated simultaneously to collect the initial pressure data and displacement data in real time and transmit them to the control module. The control module starts to calculate the average contact pressure and average displacement, and fine-tunes the servo telescopic push rods to make the pressure of the three sets of supports stable within the preset target support pressure range, thus completing the initial support positioning.
[0037] S400, self-rotating cutting and adaptive support adjustment: When the rotary drive unit 402 starts, the clamping unit 401 drives the PE pipe 60 to start rotating at a preset speed (V). The laser cutting module 30 starts and cuts only in the irregular bending area at the predetermined position, so as to achieve precise repair of the local deformation area at the port of the PE pipe 60. During the cutting process, pressure sensors and laser displacement sensors on the three sets of support units continuously collect real-time pressure data (F1, F2, F3) and displacement data (S1, S2, S3), and transmit them to the control module. The control module's built-in algorithm calculates the real-time expansion and contraction adjustment amount (ΔL) of each support unit according to the following logic to achieve adaptive support: S401, Data Preprocessing: A moving average filtering algorithm is used to filter out instantaneous fluctuations in pressure and displacement data, retaining valid data, and calculating the average contact pressure (F) of the three support units. avg ) and average displacement (S) avg ), to avoid interfering data from affecting adjustment accuracy; S402, Support Status Judgment: Based on preset target support pressure threshold and displacement deviation threshold, establish a support status judgment model: If the pressure F of a certain group of support units < F min If the support is deemed loose, the expansion / contraction of the unit needs to be increased; if F > F max The support is determined to be too tight, and the expansion / contraction of this unit needs to be reduced; if the displacement deviation |S i -S avg |>S threshold If the PE pipe 60 is found to have changed its posture, with sagging or displacement, the amount of expansion and contraction adjustment needs to be calculated based on the displacement difference. S403, Adjustment Calculation: Based on the 60° rotation speed (V) of the PE pipe, the formula is: ΔL = k × (S i -S avg )+m×(F target -F i ) Calculate the real-time expansion and contraction adjustment amount, where k and m are PID adjustment coefficients, which can adaptively match the PE pipe specification (60) and wall thickness. i Let F be the real-time value of the i-th group of displacement sensors. i S represents the real-time value of the i-th pressure sensor group. avg The sliding average of the three sets of displacement sensor data is used to ensure smooth and accurate adjustment and avoid support instability caused by over-adjustment. S404, Dynamic Feedback Correction: The calculated telescopic adjustment amount is sent to the corresponding servo telescopic push rod to adjust the position of the support unit in real time. At the same time, the pressure and displacement data after adjustment are continuously collected to form a closed-loop control of collection, calculation, adjustment and feedback, ensuring the stable support of the PE pipe throughout its 60° rotation.
[0038] S500, Attitude Deviation Correction: If the PE pipe 60 experiences a large attitude deviation (displacement deviation exceeds the threshold) during its rotation, the algorithm module will prioritize adjusting the extension and retraction of the corresponding support unit to ensure the support stability of the cutting area and prevent steps or wavy patterns from appearing on the cutting surface. At the same time, the pressure sensor will monitor the support status in real time to prevent the support from slipping or damaging the PE pipe 60, thus ensuring the product's appearance quality. S600, refined and completed linkage action: After the irregular local bending area at the end of the PE pipe 60 is cut, the control module controls the rotary drive unit 402 to stop driving, causing the clamping unit 401 to stop rotating the PE pipe 60. The laser cutting module 30 is turned off, and the servo telescopic push rod in the support unit is controlled to retract and return to its initial position. Then, the clamping unit 401 is controlled to release the clamp, and the cut PE pipe 60 is removed, completing the end finishing of one PE pipe 60. At the same time, the control module records the production parameters (target pressure, adjustment coefficient, telescopic adjustment amount, cutting range) to form a production formula. Subsequent irregularly deformed PE pipes 60 of the same specification and type can be directly called up without re-adjustment, adapting to the needs of mass production.
[0039] By adopting the above cutting method, the problem of supporting irregularly bent parts at the ends of large-diameter PE pipes 60 during the fine-tuning process can be solved, and the cutting accuracy of PE pipes 60 during fine-tuning can be improved. In actual production applications, for large-diameter PE pipes 60 of different specifications and different degrees of bending, the present invention can achieve precise support through the adaptively adjustable external support module 20, which has good stability and adaptability.
[0040] In multi-batch production, the equipment can be quickly debugged and its parameters set by calling previously recorded production formulas, significantly shortening production preparation time and improving production efficiency. Moreover, the improved flatness of the cut surface reduces the amount of manual trimming, lowering labor and subsequent processing costs. The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.
Claims
1. An apparatus for producing PE pipes, characterized in that, include: The frame, external support module, laser cutting module, clamping module, propulsion module, and control module; The external support module includes at least two sets of support units, each set of support units including: Support arm, fixed to the frame; The telescopic drive source, installed on the support arm, can extend and retract along a direction perpendicular to the axis of the PE pipe; The support end is installed on the telescopic end of the telescopic drive source and is used to contact and support the outer wall of the PE pipe. Pressure sensing element, used to collect real-time contact pressure between the support end and the PE pipe; Displacement sensing element, used to collect real-time data on the positional changes of the outer wall of the PE pipe relative to the support end; The control module is electrically connected to the telescopic drive source, the pressure sensing element, and the displacement sensing element, respectively, and is configured as follows: Receives real-time data collected by pressure and displacement sensors; Based on preset support pressure thresholds and displacement deviation thresholds, the support status of each support unit is determined. Based on the judgment results and the rotation speed of the PE pipe, the real-time expansion and contraction adjustment amount of each expansion and contraction drive source is calculated. The telescopic drive source is controlled to perform adaptive telescopic adjustment, so that the support end always fits against the outer wall of the PE pipe and maintains a stable support state.
2. The equipment for producing PE pipes according to claim 1, characterized in that, The external support module includes three sets of external support units, which are arranged in a triangular pattern below and on both sides of the PE pipe port.
3. The equipment for producing PE pipes according to claim 1, characterized in that, The surface of the support end is provided with a flexible rubber pad, and the pressure sensing element is embedded between the support end and the rubber pad.
4. The equipment for producing PE pipes according to claim 1, characterized in that, The pressure sensing element is a pressure sensor, and the displacement sensing element is a displacement sensor installed on one side of the support end.
5. The equipment for producing PE pipes according to claim 1, characterized in that, The telescopic drive source is a servo telescopic push rod, and the support end is detachably connected to the end of the servo telescopic push rod.
6. The equipment for producing PE pipes according to claim 1, characterized in that, The clamping module is located near the laser cutting module and includes a clamping unit rotatably mounted on the frame and a rotary drive unit for driving the clamping unit to rotate.
7. The equipment for producing PE pipes according to claim 1, characterized in that, The propulsion module includes a propulsion slide mounted on the frame and a linear drive unit for driving the propulsion slide to move linearly back and forth along the frame.
8. The equipment for producing PE pipes according to claim 7, characterized in that, The push slide is equipped with a height-adjustable support component for supporting the end of the PE pipe.
9. A control method for PE pipe production equipment, applied to the PE pipe production equipment according to any one of claims 1 to 8, characterized in that, Includes the following steps: S100: Initialize the equipment, input the target support pressure range, displacement deviation threshold and adjustment coefficient; S200: Push the bent part of the PE pipe to the cutting station, and clamp and fix the outside of the PE pipe through the clamping module; S300: The telescopic drive source extends to make the support end fit against the outer wall of the PE pipe. Initial data is collected by pressure and displacement sensors to complete the initial support positioning. S400: The clamping module is activated to make the PE pipe rotate, the laser cutting head cuts the bending area, and pressure and displacement data are continuously collected at the same time. The control module calculates the extension and contraction adjustment amount based on the real-time data and dynamically adjusts the position of the support end. S500: After cutting, the servo telescopic push rod is retracted and reset, the clamping module is released, the PE pipe is removed, and a finishing process is completed.
10. The equipment for producing PE pipes according to claim 9, characterized in that, The calculation formula of the telescopic adjustment amount AL in the step S400 is: AL=k×(S i -S avg )+m×(F target -F i ). where S i is the current displacement value, S avg is the average displacement value, F i is the current pressure value, F target is the target pressure value, and k, m are adjustment coefficients.