WO2023000493A1

WO2023000493A1 - High-precision automatic flanging apparatus

Info

Publication number: WO2023000493A1
Application number: PCT/CN2021/120853
Authority: WO
Inventors: 陈江慧; 霍福磊; 金崇阳; 褚展鹏; 刘跃明
Original assignee: 临海伟星新型建材有限公司
Priority date: 2021-07-22
Filing date: 2021-09-27
Publication date: 2023-01-26
Also published as: CN113478797B; CN113478797A

Abstract

Disclosed in the present invention is a high-precision automatic flanging apparatus, comprising: a pipe clamping mechanism, which is used for clamping and fixing a flanged pipe; a die rotating mechanism, which is used for rotating and switching different dies so as to perform heating, flanging and trimming operations on a pipe; and a control driving mechanism, which is used for controlling the feeding action of the dies and realizing the back-and-forth sliding of the dies. In the high-precision automatic flanging apparatus provided in the patent, heating, flanging and trimming are integrated into one apparatus, and automatic operation is achieved, such that not only can the flanging quality be guaranteed, but the flanging efficiency can also be greatly improved. The high-precision automatic flanging apparatus has the advantages of being convenient and rapid to operate, high in automation degree, accurate in product quality control, high in flanging precision and suitable for batch production, thereby solving the problem which cannot be solved by existing flanging machines on the market.

Description

A high-precision automatic flanging equipment

technical field

The patent of the invention belongs to the field of plastic pipe manufacturing equipment, in particular to a high-precision automatic flanging equipment.

Background technique

In the field of oil fields, countless pipelines are scrapped every year due to corrosion of metal pipelines. Due to the complexity of the medium in the oil, which contains many chemical components, in order to reduce the corrosion of metal pipelines, it is better to line the plastic pipes inside the steel pipes to avoid contact between crude oil and steel pipes, and to improve the oil barrier and resistance of the pipelines as a whole. corrosive. However, in the field of oil transportation in my country, plastic pipe-lined steel pipes are currently limited to oil extraction pipes, and have not been applied to large-scale gathering and transportation pipelines. Since the oil sucker pipe is pulled by the sucker rod in the pipe, there are certain requirements for the inner diameter of the pipe wall, so the technical requirements for the inner lining are relatively high, and the key is the flanging treatment. The purpose of the flanging treatment is to prevent the medium from entering the space between the lined plastic pipe and the metal pipe from the joint, which will lead to the collapse and failure of the lined plastic pipe in the long run, which will cause the lined pipe to fall off and the pipe to be scrapped. At present, there are many flanging devices on the market, but most of them are used for flanging PVC, PE and other pipes, not for lining pipe flanging, and the existing devices cannot be applied to the mass production of lining pipe flanging due to some defects. For example, Patent No. CN03261894.8 discloses a plastic pipe flanging machine. This device is used for flange connection, but cannot be used for lining pipe flanging, and this device is a manual device, which cannot guarantee the consistency of pipe flanging products. characteristics, and cannot be applied to mass production. After the existing flanging machine is used for the flanging of the inner liner, the redundant edge needs to be manually trimmed, and there are uncertain factors in the operation of the workers, the process is uncontrollable, and the original flanging is easily damaged during the trimming, resulting in leakage at the flanging , the liner collapsed.

Contents of the invention

In view of the above problems, the present invention provides a high-precision automatic flanging equipment. The equipment of the present invention integrates heating, flanging and trimming into one device, and the automatic operation not only ensures the quality of flanging, but also greatly improves the quality of flanging. The flanging efficiency is improved.

In order to achieve the above object, the technical solution adopted by the present invention is: a high-precision automatic flanging equipment, characterized in that it includes:

Pipe clamping mechanism, used to clamp and fix the flanged pipe;

The mold rotation mechanism is used to rotate and switch the heating mold, flanging mold and trimming mold to realize the heating, flanging and trimming operations of the pipe;

Control the driving mechanism to control the feeding action of the mold and realize the sliding of the mold back and forth.

Further, the pipe clamping mechanism includes a clamping base and a clamping top seat that cooperate with each other, a top seat fixing block fixed on the clamping top seat by hexagon socket head screws, and a hydraulic cylinder assembly for Apply pressure to the top seat fixing block to make the clamping pipe more firm and reliable.

Further, the hydraulic cylinder assembly includes a hydraulic cylinder, a hydraulic cylinder seat, and a guide post. There are two guide posts fixedly arranged on both sides of the pipe, and the hydraulic cylinder seat is fixed on the top of the guide post by a hex nut. The hydraulic cylinder is fixedly arranged on the lower part of the hydraulic cylinder base, and the cylinder rod of the hydraulic cylinder can be connected with the fixed block of the top seat to apply pressure to make the clamping pipe more firm.

Further, the contact surfaces of the clamping base, the clamping top seat and the steel pipe are arc-shaped surfaces, and are provided with multiple grooves to increase the clamping friction. The steel pipe is nested with a lined plastic pipe, so There are two sets of clamping bases and clamping top seats respectively, which are arranged in parallel in the direction of the pipe material, and the top seat fixing blocks are fixed on the two sets of clamping top seats.

Further, the mold rotating mechanism includes a heating mold, a flanging mold and a trimming mold arranged on the mold rotating table, and different molds can be switched by rotating the mold rotating table, and also includes a servo motor arranged on the opposite side of the mold rotating table A, the servo motor A drives the transmission shaft through the small gear and the large gear to drive the mold rotary table to rotate to achieve precise angle rotation, and the transmission shaft is connected to the mold rotary table through a round nut.

Further, the servo motor A is fixed on the motor bracket, and the motor bracket has a U-shaped opening structure, and the bottom surface is connected to the sliding seat through threads.

Further, the heating mold is installed in a sleeve, which can be sleeved on the outside of the pipe. It is equipped with an inner heating sleeve and an outer heating sleeve, which can realize the heating of the inner and outer walls of the pipe. The heating mold is also equipped with a temperature sensor for real-time monitoring. Pipe temperature; the flanging mold includes a base and a flanging head arranged on the base. The flanging head is arranged in a sleeve shape with a diameter smaller than the diameter of the pipe. The end of the flanging head has a slope, which is convenient for the mold to enter Edge pipe material, the surface of the flanging mold is also coated with Teflon, so that the plastic is not easy to bond.

Further, the trimming mold is in the shape of a hollow cylindrical sleeve, and the trimming mold is in the shape of a hollow cylindrical sleeve, with a spring support behind it, and is set on the mold rotating table through a screw fixing seat, and the screw fixing seat includes a circular The base and the spiral rotating support, the circular base is fixed on the mold rotating table, and the center of the bottom of the trimming mold has an inner hole that matches the spiral rotating support, which can be plugged into the spiral rotating support. The spring It is arranged between the circular base and the trimming mold and is fixedly connected with the circular base. When the trimming abrasive tool is working, when the driving mechanism is controlled to feed the mold trimming, the spring is compressed, and the trimming mold can be nested into the spiral rotating support. seat, so as to realize the self-rotation of the trimming mold during trimming, and improve the working accuracy and efficiency. The end of the trimming mold is provided with a sharp conical surface, which can cut off the excess flanging with the advancement of the mold rotating mechanism to ensure the quality. The angle between the slope of the conical surface and the horizontal central axis is 20-60 degrees , preferably 30 degrees.

Further, the control drive mechanism includes a sliding seat arranged under the bottom surface of the motor bracket and connected by threads, two linear slide rails arranged in parallel under the two ends of the sliding seat, and a limit stop is provided at the end of the sliding rail near the pipe. There is also a positioning sensor at one end of the linear slide rail, which can automatically control the feeding distance of the mold. The control drive mechanism also includes a servo motor B, a ball screw and a push plate arranged on the lower surface of the equipment platform. Open slots are arranged between the linear slide rails, and the upper end of the push plate passes through the open slots and is connected to the sliding seat. The servo motor B drives the push plate through a gear-driven ball screw to realize the sliding of the mold back and forth.

Compared with the prior art, the equipment of the present invention has the following beneficial effects:

(1) The equipment of the present invention is equipped with a positioning sensor. After the pipe section is placed, there is no need to manually input the feeding parameters of the flanging mold. To achieve high-precision positioning.

(2) The heating mold of the equipment of the present invention is provided with an outer heating sleeve, an inner heating rod and a temperature sensor, so that the inner and outer walls of the pipe are heated together and the heating is uniform. Therefore, it is avoided that the existing equipment unilaterally heats the inner wall or the outer wall of the pipe to cause uneven heating, and the pipe is broken during flanging. Moreover, the distance between the sensor and the end of the pipe to be heated is relatively close, so the measured temperature of the pipe section is more reliable. Compared with the market, it is more accurate to measure the temperature of the heating mold. It can clearly measure the actual pipe temperature, and then adjust the heating temperature of the mold, and the heating accuracy is higher.

(3) The equipment of the present invention is equipped with a mold rotating table, which realizes heating, flanging, and trimming in one, and is controlled by a servo motor, which has higher precision than the existing equipment.

(4) The equipment of the present invention is driven by a ball screw, and the servo motor controls the feeding of the mold rotary table. The heating temperature, feeding speed and feeding size can be controlled and displayed on the display screen.

(5) When the equipment of the present invention is trimming, the trimming mold is trimmed while rotating, and the trimming efficiency and effect are better.

To sum up, this patent provides a high-precision automatic flanging equipment, which has the advantages of convenient operation, high degree of automation, and precise product quality control. unsolvable puzzle.

Description of drawings

Fig. 1 is the structural representation of high-precision automatic flanging equipment of the present invention;

Fig. 2 is the front view of the high-precision automatic flanging equipment of the present invention;

Fig. 3 is the axial view of the heating mold of the high-precision automatic flanging equipment of the present invention;

Fig. 4 is a structural schematic diagram of the screw fixing seat of the high-precision automatic flanging equipment of the present invention;

Fig. 5 is an exploded view of the connection of the trimming mold of the high-precision automatic flanging equipment of the present invention.

In the figure: 1. Equipment platform; 2. Lined plastic pipe; 3. Steel pipe; 4. Clamping base; 5. Clamping top seat; 6. Top seat fixing block; cylinder; 9, guide post; 10, hydraulic cylinder seat; 11, hex nut; 12, trimming mold; 13, heating mold; 131, inner heating sleeve; 132, outer heating sleeve; 133, temperature sensor; 14, Flanging mold; 15. Mold rotary table; 16. Big gear; 17. Pinion; 18. Servo motor A; 19. Sliding seat; 20. Positioning sensor; 21. Linear slide rail; 22. Limit block; 23. Display screen; 24, round nut; 25, transmission shaft; 26, screw support; 27, push plate; 28, ball screw; 29, servo motor B; 30, motor bracket; 31, screw fixing seat; 311, circle Shaped base; 312, spiral rotating support.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "comprising" and "having" in the description and claims of the present invention and the above drawings, as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, including a series of steps or units A process, method, system, product or device is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product or device.

As shown in Figure 1-2, a high-precision automatic flanging equipment is mainly composed of three parts: a pipe clamping mechanism, a mold rotation mechanism, and a control drive mechanism. Among them, the pipe clamping mechanism is used for flanging the pipe Clamping and fixing; the mold rotation mechanism is used to rotate and switch the heating mold, flanging mold, and trimming mold to realize the heating, flanging, and trimming operations of the pipe; the control drive mechanism is used to control the feeding action of the mold And realize the mold sliding back and forth.

The pipe clamping mechanism is mainly composed of a clamping base 4, a clamping top seat 5, a top seat fixing block 6, a hydraulic cylinder 7, a hydraulic cylinder seat 10 and a guide column 9. Its main function is to clamp and fix the steel pipe 3 (lined with steel pipe for plastic pipe 2). The clamping base 4 and the clamping top seat 5 are provided with multiple grooves on the contact surface with the steel pipe to increase the clamping friction; the top seat fixing block 6 is fixed to the two clamping tops by hex socket head cap screws 7 On the seat 5, and connected with the cylinder rod of the hydraulic cylinder 10, the hydraulic cylinder controls the clamping of the pipe, and the clamping is more reliable.

The mold rotating mechanism is mainly composed of a heating mold 13, a flanging mold 14, a trimming mold 12, a mold rotating table 15, a large gear 16, a pinion 17, a transmission shaft 25 and a servo motor A18. The heating mold 13, the flanging mold 14 and the trimming mold 12 are arranged on the mold rotary table, and different molds can be switched by rotating the mold rotary table. The servo motor A18 is fixed on the motor support 30, and is arranged on the opposite surface of the mold rotary table 15. The servo motor A18 drives the transmission shaft 25 through the pinion 17 and the bull gear 16 to drive the mold turntable 15 to rotate to achieve precise angle rotation. The drive shaft 25 is connected to the mold turntable 15 through a round nut 24 . The motor bracket 30 is a U-shaped opening structure, and the bottom surface is connected to the sliding seat 19 by threads.

Referring to Fig. 3, the heating mold is in the shape of a sleeve, which can be sleeved on the outside of the pipe, and is provided with an outer heating sleeve 132 and an inner heating rod 131, so that the inner and outer walls of the pipe can be heated together and evenly heated. Moreover, four temperature sensors 133 are also arranged in the heating mold, which can monitor the actual temperature of the pipe material in real time, which is more accurate and reliable than the current existing flanging equipment for testing the heater temperature; Flange indenter, the flanged indenter is set in the shape of a sleeve, the diameter is slightly larger than the diameter of the pipe, and the end of the flanged indenter has a slope, which is convenient for the mold to enter the flanged pipe. The angle is 20-60 degrees, and the surface of the flanging mold is also coated with Teflon, so that the plastic is not easy to bond, and the quality of the flanging is better; the trimming mold has a cylindrical structure and is fixed on the mold rotating mechanism , the end of the trimming mold is provided with a sharp tapered surface. When the flanging is completed, the equipment feeds the trimming mold to cut off the excess flanging to ensure the quality of the flanging; the mold rotary table is driven by the transmission shaft Driven by servo motor to achieve precise angle rotation.

As shown in Figures 4 and 5, the trimming mold is a hollow cylindrical sleeve-like structure, and the trimming mold 12 is a hollow cylindrical sleeve-like structure, and the back is provided with a spring 32 support, and is arranged on the mold rotation by a screw holder 31. On the platform 15, the spiral fixed seat 31 includes a circular base 311 and a spiral rotating support 312, the circular base 311 is fixed on the mold rotating platform 15, and the center of the bottom of the trimming mold 12 has a spiral rotating support 312. The inner hole can be inserted into the spiral rotating support. The spring is arranged between the circular base and the trimming mold and is fixedly connected with the circular base. When the trimming abrasive tool is working, the driving mechanism is controlled to feed the mold trimming When trimming, the spring is compressed, and the trimming mold can be nested into the spiral rotating support, so as to realize the self-rotation of the trimming mold during trimming, and improve the accuracy and efficiency of trimming work. The end of the trimming mold is provided with a sharp conical surface, which can cut off the excess flanging with the advancement of the mold rotating mechanism to ensure the quality. The angle between the slope of the conical surface and the horizontal central axis is 20-60 degrees , preferably 30 degrees.

Described control mechanism is mainly made up of servomotor B29, ball screw 28, push plate 27 and sliding seat 19. The sliding seat 19 is arranged under the bottom surface of the motor bracket 30 through threaded connection, two linear slide rails 21 are arranged parallelly under the two ends of the sliding seat 19, and a limit block 22 is arranged at the end of the linear slide rail 21 close to the pipe material. One end of 21 is also provided with a positioning sensor 20, and the device can sense the position of the pipe section and the distance left at the end according to the positioning sensor 20, and then automatically adjust heating and flanging die feeding; the servo motor B29, ball screw 28 and push plate 27 are arranged on the lower surface of the equipment platform, and an open slot is provided between the linear slide rails 21. The upper end of the push plate 27 is connected to the slide seat 19 through the open slot, and the servo motor B29 drives the ball wire through a set of gears. Bar 28 drives push plate, realizes mold slides back and forth with this. Wherein, the ball screw 28 is fixed by the screw support 26 .

A display screen 23 is also provided on the equipment plane 1 for displaying information such as heating temperature, feed speed, and feed size.

Specific steps:

When using, first line the plastic pipe with the steel pipe, select the clamping base and clamping top seat of appropriate specifications according to the size of the steel pipe, then just place the steel pipe on the clamping base, press the start button, and the equipment will automatically Clamp the steel pipe, and after clamping, the positioning sensor will measure the distance between the plastic pipe to be flanged and the end of the steel pipe, so as to determine the feeding position of the heating mold. After the equipment heats the pipe according to the set temperature and time, the heating mold exits, the mold rotary table rotates 120°, and the flanging mold feeds. According to the set cooling time, the equipment waits for the trimming mold to work, and the trimming mold rotates while trimming until the set time is reached to complete the trimming process. The above process is fully automated except for the placement of pipes.

The device of the invention adopts a novel structure, high precision and full automation, can be used for mass production in enterprises, and makes up for the deficiencies of existing flanging machines, and has great application prospects.

Claims

A high-precision automatic flanging equipment is characterized in that it includes:

Pipe clamping mechanism, used to clamp and fix the flanged pipe;

The mold rotation mechanism is used to rotate and switch the heating mold, flanging mold and trimming mold to realize the heating, flanging and trimming operations of the pipe;

Control the driving mechanism to control the feeding action of the mold and realize the sliding of the mold back and forth.
A high-precision automatic flanging device according to claim 1, characterized in that, the pipe clamping mechanism includes a clamping base (4) and a clamping top seat (5) that cooperate with each other, and are arranged on the clamping top The upper part of the seat (5) is fixed by the hexagon socket head cap screw (7) on the top seat fixing block (6), and also includes a hydraulic cylinder assembly, which is used to apply pressure to the top seat fixing block (6) to make the clamped pipe more firm reliable.
A kind of high-precision automatic flanging equipment according to claim 2, characterized in that, the hydraulic cylinder assembly includes a hydraulic cylinder (8), a hydraulic cylinder seat (10) and a guide post (9), and the guide post ( 9) are two, fixedly arranged on both sides of the pipe, the hydraulic cylinder seat (10) is fixed on the top of the guide column (9) through a hex nut (11), and the hydraulic cylinder (8) is fixedly arranged on the hydraulic cylinder seat ( 10), the cylinder rod of the hydraulic cylinder (10) can be connected with the top seat fixed block (6) to apply pressure to make the clamped pipe more firmly.
A high-precision automatic flanging device according to claim 2, characterized in that, the contact surfaces of the clamping base (4), the clamping top seat (5) and the steel pipe (3) are arc-shaped surfaces, and There are multiple grooves to increase the clamping friction, the steel pipe (3) is nested with a lined plastic tube (2), the clamping base (4) and the clamping top seat (5) are two Covers are arranged in parallel on the direction of the pipe material, and the top seat fixing block (6) is fixed on the two sets of clamping top seats (5).
A kind of high-precision automatic flanging equipment according to claim 1, characterized in that, the mold rotating mechanism includes a heating mold (13), a flanging mold (14) and a repairing mold arranged on the mold rotating table (15). The side mold (12) can switch different molds by rotating the mold turntable (15), and also includes a servo motor A (18) arranged on the opposite surface of the mold turntable (15), and the servo motor A (18) passes through a small The gear (17) and the bull gear (16) cooperate to drive the transmission shaft (25) to drive the mold turntable (15) to rotate to achieve precise angle rotation. The drive shaft (25) is connected to the mold turntable ( 15) connection, the servo motor A (18) is fixed on the motor bracket (30), the motor bracket (30) is a U-shaped opening structure, and the bottom surface is connected to the sliding seat (19) by threads.
A high-precision automatic flanging device according to claim 5, characterized in that, the heating mold (13) is sleeved and can be sleeved on the outside of the pipe, and an inner heating sleeve (131) and an outer heating sleeve (131) are provided. The heating sleeve (132) can be used to heat both the inner and outer walls of the pipe, and the heating mold is also provided with a temperature sensor (133) to monitor the temperature of the pipe in real time.
A high-precision automatic flanging equipment according to claim 5, wherein the flanging mold includes a base and a flanging pressure head arranged on the base, the flanging pressure head is arranged in a sleeve shape, The end of the flanging pressure head has a bevel, which is convenient for the mold to enter the flanging pipe. The angle between the inclination of the bevel and the horizontal central axis is 20-60 degrees. The surface of the flanging mold is also coated with Teflon, so that the flanging Plastic is not easy to bond.
A kind of high-precision flanging equipment according to claim 5, characterized in that, the trimming mold is a hollow cylindrical sleeve-shaped structure, and a spring (32) is provided at the back to support it, and it is arranged on the On the mold rotating table (15), the screw fixing seat (31) comprises a circular base (311) and a spiral rotating support (312), and the circular base (311) is fixed on the mold rotating table (15), and the trimming mold (12) The center of the bottom has an inner hole matched with the spiral rotating support (312), which can be inserted into the upper end of the spiral rotating support, and the spring (32) is arranged on the circular base and the trimming mold (12 ) and is fixedly connected with the circular base. When the trimming abrasive tool is working, when the control drive mechanism feeds the mold trimming, the spring is compressed, and the trimming mold can be nested into the spiral rotating support, thereby realizing the trimming mold in the Self-rotation during trimming improves work accuracy and efficiency.
A kind of high-precision automatic flanging equipment according to claim 8, characterized in that, the end of the trimming mold is provided with a sharp tapered surface, and the redundant flanging can be cut off with the advancement of the mold rotating mechanism, To ensure quality, the included angle between the slope of the tapered surface and the horizontal central axis is 20-60 degrees, preferably 30 degrees.
A kind of high-precision automatic flanging equipment according to claim 1, characterized in that, the control drive mechanism includes a sliding seat (19) arranged under the bottom surface of the motor bracket (30) and connected by threads, and at both ends of the sliding seat Two linear slide rails (21) arranged in parallel below are provided with a limit block (22) at the end of the slide rails close to the pipe, and a positioning sensor (20) is also provided at the end of the linear slide rails (21), which can The feeding distance of the mold is automatically controlled, and the control drive mechanism also includes a servo motor B (29), a ball screw (28) and a push plate (27) arranged on the lower surface of the equipment platform (1). There is an open slot between them, and the upper end of the push plate (27) passes through the open slot and is connected to the sliding seat (19). The servo motor B (29) drives the push plate (27) through the gear-driven ball screw (28) to This enables the mold to slide back and forth.