Cutting, pipe end hole drawing and numerical control pipe bending all-in-one machine

Abstract

The invention relates to a numerical control pipe bending all-in-one machine for cutting pipe ends and drawing holes. The device comprises a rack, a cutting mechanism fixed to the upper end of the rack, a front pipe end machining mechanism fixed to the front end of the cutting mechanism, a rear pipe end rotary punching mechanism fixed to the side face of the front pipe end machining mechanism, and a double-die right-bending pipe bending machine fixed to the side face of the rear pipe end rotary punching mechanism. The translation manipulator is fixed at the upper end of the rack; the control mechanism is mounted beside the rack; existing slender pipe machining steps comprise the steps of back pipe end treatment and hole drawing after rotary punching, cutting and hole drawing, a hole drawing station is arranged in front of the device and shares the same station with cutting, hole drawing and cutting share the same clamp and positioning system, and positioning deviation caused by two times of clamping in a traditional technology is avoided. For a long and thin pipe, deformation errors caused by multiple times of clamping can be effectively controlled through single-time clamping, the hole drawing device is placed at the front end, and breakage caused by the fact that the hole drawing die is too long is avoided.

Description

Technical Field

[0001] The present invention relates to the field of slender tube processing, and particularly to a numerical control tube bending integrated machine for blanking tube end hole drawing. Background Art

[0002] In fields such as aerospace and automotive manufacturing, slender tube parts are widely used due to their lightweight and high-strength characteristics. However, such parts have extremely high requirements for machining accuracy and surface quality, and traditional machining processes face many challenges. The existing slender tube processing flow usually includes independent processes such as loading, straightening, rotary punching, cutting, hole drawing, post-treatment, and tube bending. Multiple clamping and positioning are required in each link, resulting in low processing efficiency and significant error accumulation. For example, in the traditional process, the hole drawing process needs to be carried out after rotary punching and cutting. At this time, the hole drawing die needs to extend from the rear end of the tube body to the front end for operation, resulting in an overly long core rod (usually exceeding 2 / 3 of the tube body length). Under the action of high-frequency vibration and high pressure, it is extremely easy to bend or break. The die life is generally less than 8000 times, and the machining accuracy is limited by the deflection of the core rod. The coaxiality error of the hole position can reach ±0.3 - 0.5 mm. In addition, in the existing process, hole drawing and rotary punching are carried out step by step, and the local stress generated by the tube during hole drawing cannot be released in time. When rotary punching is carried out subsequently, an additional driving force of more than 30% needs to be applied, which not only increases energy consumption but also causes the overall residual stress of the pipe fitting to increase, and the springback amount in the tube bending process increases by 15% - 20%, seriously affecting the dimensional stability of the final product.

[0003] Although the prior art such as CN107876859A proposes a blanking tube end processing device, it still places the hole drawing process at the back and fails to solve the problems of overly long dies and multiple clamping. Such devices complete cutting and hole drawing through independent workstations. The two clamps result in a deviation of the positioning reference, and it is difficult to control the coaxiality between the cutting section and the hole drawing center within 0.1 mm, which cannot meet the strict requirements for precision pipe fittings in the aerospace field. At the same time, the straightening, feeding, cutting and other modules of traditional equipment are independent of each other and lack coordinated control, resulting in the pipe being easily interfered by external forces during transfer. The straightness error deteriorates from ≤0.2 mm / m after straightening to ≤0.5 mm / m before cutting, further affecting the subsequent machining accuracy. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a numerically controlled pipe bending and end hole punching integrated machine, which solves the problems existing in the prior art. By integrating a blanking mechanism, front / rear pipe end processing mechanisms, a dual-mode pipe bender, and a translation manipulator on the machine frame, continuous processing from pipe feeding → straightening → cutting → pipe end forming → pipe bending is realized. The front pipe end processing mechanism integrates a hole punching component and a cutting component at the same station, sharing a cutting clamp die and a positioning reference, and completing cutting and hole punching in a single clamping. Moreover, by sharing the same set of pneumatic clamping system (driven by a cutting clamp die cylinder) for the cutting clamp die and the hole punching clamp die, the coaxiality between the cutting section and the hole punching center is ensured to be ≤0.05 mm, avoiding the hole position deviation caused by two clamps in the traditional process. It realizes high-precision, high-efficiency, and low-loss production of the whole process from material to finished product for slender pipe processing, and is especially suitable for the strict requirements of complex pipe fittings in fields such as aerospace and automobile manufacturing.

[0006] (II) Technical Solution

[0007] To achieve the above purpose, the present invention provides the following technical solution: A numerically controlled pipe bending and end hole punching integrated machine for blanking pipes includes a machine frame, with a blanking mechanism fixed at the upper end of the machine frame, a front pipe end processing mechanism fixed at the front end of the blanking mechanism, a rear pipe end rotary punching mechanism fixed at the side of the front pipe end processing mechanism, a dual-mode right pipe bender fixed at the side of the rear pipe end rotary punching mechanism, a translation manipulator fixed at the upper end of the machine frame, and a control mechanism placed beside the machine frame; the machine frame serves as the basic support structure of the entire device, fixing all components such as the blanking mechanism, the front pipe end processing mechanism, and the pipe bender, and ensuring the relative position accuracy between components. The blanking mechanism is used to feed the pipe into the device, perform roundness and straightness correction, and then cut it into the required length. The front pipe end processing mechanism is used to perform hole punching and sealing treatment on the front end of the pipe. The rear pipe end rotary punching mechanism is used to perform rotary punching on the rear end of the pipe, and can process the expansion and contraction of the pipe fittings. When the pipe needs to be bent to the right, the clamp die at the lower clamp die of the dual-mode right pipe bender clamps the pipe for bending. The up and down position of the round die is adjusted by an up and down replacement cylinder, and the left and right demoulding is adjusted by left and right cylinders. This device already exists in the prior art, so it will not be elaborated here. The translation manipulator is the clamping, conversion station, and unloading module of the device, and such devices widely exist in the prior art. The control mechanism is used to control the overall operation of the device.

[0008] The front pipe end processing mechanism includes a front pipe end hole punching component, with a front pipe end rotary punching component fixed at the side of the front pipe end hole punching component; the front pipe end hole punching component completes hole punching processing at the front end of the pipe. The front pipe end rotary punching component performs rotary punching processing on the front end of the pipe after hole punching, and seals the front part of the pipe body.

[0009] The front pipe end hole-drilling component includes a hole-drilling slider installed on the frame. A hole-drilling fixed plate is fixed to the upper end of the hole-drilling slider. A hole-drilling guide rail is fixed to the upper end of the hole-drilling fixed plate. A hole-drilling bracket is fixed to the upper end of the hole-drilling guide rail. A hole-drilling motor fixed to the front end of the hole-drilling bracket. A hole-drilling front-back displacement cylinder is fixed to the lower end of the hole-drilling motor. A hole-drilling left-right displacement cylinder is fixed to the side of the hole-drilling fixed plate. A coupling is installed at the rear end of the hole-drilling motor. A hole-drilling die is fixed to the rear end of the coupling; A guide rail is fixed to the upper end of the frame. The hole-drilling slider is installed at the upper end of the guide rail of the frame. The horizontal movement of the hole-drilling bracket is realized through the guide rail, which is used to send the hole-drilling die into the pipe. And during hole-drilling, through the horizontal movement of the hole-drilling die, pressure is applied to the inner wall of the pipe to complete hole-drilling. The hole-drilling fixed plate fixes the hole-drilling guide rail and the left-right displacement cylinder. The hole-drilling guide rail cooperates with the hole-drilling bracket. A slider is arranged at the lower end of the hole-drilling bracket to realize the front-back movement of the hole-drilling bracket. The hole-drilling motor rotates, and the hole-drilling die is connected to the hole-drilling motor through the coupling. The hole-drilling motor drives the hole-drilling die to rotate. The hole-drilling die can only drill holes in one direction, and the direction of hole-drilling is changed by rotation. The hole-drilling front-back displacement cylinder has its front end fixed to the hole-drilling fixed plate and the cylinder body fixed to the hole-drilling motor. Because the hole-drilling slider below the hole-drilling fixed plate can only move left and right, when the hole-drilling front-back displacement cylinder acts, the cylinder body drives the hole-drilling bracket to move back and forth. The hole-drilling left-right displacement cylinder has its cylinder body fixed to the frame, and one end of the cylinder is connected to the hole-drilling fixed plate, and the left-right displacement of the hole-drilling die is controlled by telescoping. In the front pipe end processing mechanism of this device, the physical adjacent layout of the hole-drilling and rotary punching (sealing) processes. The hole-drilling principle of the hole-drilling die is to realize punching through the cooperation of the inclined surface of the inner core rod head and the inclined surface of the punch. As Figure 4 shown, it is divided into three states. Original state: The punch is completely inside the outer sleeve head to ensure that it will not protrude from the outer sleeve head, otherwise it will scratch the pipe. Punching state: The first step of the punch is tangent to the pipe. Hole-drilling state: The tangent line (actual effective height) of the second step of the punch is more than 0.5 above the flanging height (at least to ensure more than 0.2). And ensure that there is half or more contact section between the punch and the inner core rod head, and the third step of the punch cannot contact the inner wall of the pipe.

[0010] The process of first hole-drilling and then rotary punching can avoid the positioning error caused by secondary clamping after cooling in traditional step-by-step processing, improve the port size accuracy. Immediately after hole-drilling, rotary punching is carried out. The radial pressure during rotary punching can be used to offset the local stress generated by hole-drilling, reducing the overall residual stress of the pipe fitting by more than 40%, reducing the springback amount in the subsequent pipe bending process. The radial pressure during rotary punching can also be used to "cold extrusion repair" the microcracks generated by hole-drilling, reducing the surface roughness of the pipe orifice part. Moreover, the existing devices all perform front pipe end treatment first. After the treatment is completed, the hole-drilling die is inserted from the rear end of the pipe body. And because the holes are all at the front end of the pipe body, the hole-drilling die is too long and prone to breakage.

[0011] Preferably, the blanking mechanism includes a cutting component fixed to the rear end of the hole punching component. A feeding component is installed at the rear end of the cutting component, and a roundness and straightness calibration component is installed at the rear end of the feeding component. The cutting component is used to cut the pipe fitting into a fixed length after hole punching, which is convenient for the clamping of the translation manipulator and the conversion of the working station. The feeding component is used to feed the roundness- and straightness-calibrated pipe material into the hole punching component for hole punching. The roundness and straightness calibration component calibrates and straightens the initial incoming material, eliminates the bending or ovality deviation when the pipe material leaves the factory, and provides a high-precision reference for subsequent processing.

[0012] Preferably, the roundness and straightness calibration component includes a calibration frame fixed to the upper end of the machine frame. A calibration plate is fixed to the upper end of the calibration frame. Horizontal straightening wheels are installed on the calibration plate. A wheel frame is fixed to the upper end of the calibration plate, and vertical straightening wheels are fixed to the side of the wheel frame. The calibration frame fixes the calibration plate and the wheel frame to form a straightening structure framework. The calibration plate installs horizontal straightening wheels to extrude the pipe material in the horizontal direction and correct the side bending of the pipe material (straightness ≤ 0.2 mm / m). The horizontal straightening wheels are arranged in pairs, and pressure is applied to the pipe material through the spacing to straighten the bending of the pipe material in the horizontal direction by rolling friction. The wheel frame installs vertical straightening wheels to correct the up-and-down bending or ovality of the pipe material. The vertical straightening wheels cooperate with the horizontal straightening wheels to form a three-dimensional straightening space to ensure that the pipe material reaches high-precision straightness and roundness before entering the feeding component.

[0013] Preferably, the feeding component includes a gear box fixed to the upper end of the machine frame. A feeding servo is fixed to the side of the gear box. A feeding lead screw is installed on the side of the gear box. A bearing seat is installed at the end of the feeding lead screw. A sliding seat is installed on the feeding lead screw. A feeding slide rail is installed at the lower end of the sliding seat. A feeding clamping die is fixed to the upper end of the sliding seat, and a feeding air cylinder is fixed to the upper end of the feeding clamping die. The gear box transmits the power of the feeding servo, transmits the rotational speed and torque through gears, and ensures the stable rotation of the feeding lead screw. The feeding servo is a high-precision servo motor, receives the instructions of the control mechanism, drives the feeding lead screw to achieve fixed-length feeding. The feeding lead screw cooperates with the sliding seat. A threaded hole is fixed in the sliding seat. The feeding lead screw converts the rotational motion into the linear motion of the sliding seat through this threaded hole. The sliding seat is installed on the feeding lead screw, is guided by the feeding slide rail, and drives the feeding clamping die to move. The feeding clamping die is driven by the feeding air cylinder to clamp the pipe material and drives the pipe material to move during feeding. The feeding clamping die performs an up-and-down opening and closing motion to clamp the pipe material. The bearing seat supports the end of the feeding lead screw, reduces the radial runout and friction during the rotation of the lead screw, and extends the service life of the lead screw.

[0014] Preferably, the cutting component includes a cutting mechanism, and a breaking and hole punching mechanism is installed at the front end of the cutting mechanism. The cutting mechanism is used to cut a breaking notch on the outer surface of the pipe material, which is an incomplete cut, and then the pipe material is broken by the breaking and hole punching mechanism.

[0015] Preferably, the cutting mechanism includes a motor fixing plate fixed to the upper end of the frame. A cutting motor is fixed to the upper end of the motor fixing plate. A pulley is connected to the output shaft of the cutting motor. The other end of the pulley is connected to a cutting tool head. A cutting bracket is fixed to the side of the cutting tool head. A cutting clamping die is fixed to the upper end of the cutting bracket. A cutting clamping die cylinder is installed at the upper end of the cutting clamping die. The motor fixing plate fixes the cutting motor and provides an installation reference. The cutting motor drives the cutting tool head to rotate at high speed through the pulley to achieve pipe cutting. The cutting guide head is arranged between the cutting clamping die and the pulling and punching mechanism. The cutting tool head directly contacts the pipe and completes the cutting. The cutting method is circumferential cutting, which is carried out outside the pipe body. The cutting bracket supports the cutting clamping die to ensure the relative position accuracy between the clamping die and the cutting tool head. The cutting clamping die clamps the pipe driven by the cutting clamping die cylinder before cutting to prevent the pipe from shaking or shifting during cutting.

[0016] Preferably, the pulling and punching mechanism includes a pulling and punching clamping die action block fixed to the punching bracket. A movement block guide rail is arranged at the lower end of the pulling and punching clamping die action block. A pulling and punching clamping die cylinder is arranged at the lower end of the pulling and punching clamping die action block. A pulling and punching clamping die is arranged inside the pulling and punching clamping die action block. The movement block guide rail provides linear motion guidance for the pulling and punching clamping die action block to ensure stable movement without shaking. The pulling and punching clamping die action block is connected to the frame through a connecting block. The pulling and punching clamping die cylinder drives the clamping die action block to move, clamping the pulling and punching clamping die left and right. The clamping die action block converts the up and down movement of the cylinder into the power to drive the pulling and punching clamping die to move left and right. This action block has existing mature technologies. The pulling and punching clamping die realizes the dual functions of "pulling the pipe after cutting" and "fixing the front end of the pipe during punching". It greatly reduces the number of pipe clamping dies and reduces the scratch defects on the outside of the pipe body.

[0017] (III) Beneficial effects

[0018] The purpose of the present invention is to provide a numerical control pipe bending machine with hole punching at the end of the cut pipe. This device advances the hole punching process, realizes the integration of multiple processes with a single clamping, and the cutting and hole punching share the same set of clamps (cutting clamping die and hole punching clamping die). Through the pneumatic clamping system (cutting clamping die cylinder), it ensures that the coaxiality between the cutting section and the hole punching center is ≤0.05 mm, avoiding the hole position deviation caused by two clamps in the traditional process (traditional error ±0.3 - 0.5 mm). This device places the hole punching die in front, at the front end of the pipe body, and performs the rotary punching process after hole punching, enabling the hole punching die to enter from the front end of the pipe body, greatly reducing the core length of the punching die. The core length is shortened by more than 50%, the bending strength is improved, and the service life is extended to more than 15,000 times. Description of the drawings

[0019] Figure 1 It is the overall schematic diagram of the present invention;

[0020] Figure 2Schematic diagram of the front pipe end processing mechanism in the present invention;

[0021] Figure 3 Schematic diagram of the front pipe end hole drawing component in the present invention;

[0022] Figure 4 Schematic diagram of the principle of the hole drawing die in the present invention;

[0023] Figure 5 Schematic diagram of the blanking mechanism in the present invention;

[0024] Figure 6 Schematic diagram of the roundness and straightness calibration component in the present invention;

[0025] Figure 7 Schematic diagram of the feeding component in the present invention;

[0026] Figure 8 Schematic diagram of the cutting component in the present invention;

[0027] Figure 9 Schematic diagram of the cutting mechanism in the present invention.

[0028] Figure 10 Schematic diagram of the break-off and hole drawing mechanism in the present invention.

[0029] In the figure: 1 - frame, 2 - blanking mechanism, 201 - cutting component, 202 - feeding component, 2021 - gearbox, 2022 - feeding servo, 2023 - feeding lead screw, 2024 - sliding seat, 2025 - feeding clamping die, 2026 - feeding cylinder, 203 - roundness and straightness calibration component, 2031 - calibration frame, 2032 - calibration plate, 2033 - horizontal straightening wheel, 2034 - wheel frame, 2035 - vertically arranged straightening wheel, 204 - cutting mechanism, 2041 - motor fixing plate, 2042 - cutting motor, 2043 - cutting bracket, 2044 - cutting clamping die, 2045 - cutting clamping die cylinder, 2046 - cutting tool head, 2047 - pulley, 205 - break-off and hole drawing mechanism, 2051 - moving block guide rail, 2052 - break-off and hole drawing clamping die moving block, 2053 - break-off and hole drawing clamping die cylinder, 2054 - break-off and hole drawing clamping die, 3 - front pipe end processing mechanism, 301 - front pipe end hole drawing component, 3011 - hole drawing slider, 3012 - hole drawing fixing plate, 3013 - hole drawing guide rail, 3014 - hole drawing bracket, 3015 - hole drawing motor, 3016 - hole drawing front and back displacement cylinder, 3017 - hole drawing left and right displacement cylinder, 3018 - coupling, 3019 - hole drawing die, 302 - front pipe end rotary punching component, 4 - rear pipe end rotary punching mechanism, 5 - double-mode right-angle pipe bender, 6 - translation manipulator, 7 - control mechanism. Detailed implementation manners

[0030] Next, the attached drawings in the examples of the present invention will be combinedFigures 1-9 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figure 1 shown, the present invention provides a technical solution: a numerical control pipe bending machine for end punching of cutting pipes, which includes a frame 1. A cutting mechanism 2 is fixed at the upper end of the frame 1. A front pipe end processing mechanism 3 is fixed at the front end of the cutting mechanism 2. A rear pipe end rotary punching mechanism 4 is fixed on the side of the front pipe end processing mechanism 3. A double-mode right pipe bending machine 5 is fixed on the side of the rear pipe end rotary punching mechanism 4. A translation manipulator 6 is fixed at the upper end of the frame 1. A control mechanism 7 is placed beside the frame 1. The frame 1 serves as the basic support structure of the entire device, fixing all components such as the cutting mechanism 2, the front pipe end processing mechanism 3, and the pipe bending machine, and ensuring the relative position accuracy between the components. The cutting mechanism 2 is used to feed the pipe into the device, perform roundness and straightness correction, and then cut it into the required length. The front pipe end processing mechanism 3 is used to perform hole punching and sealing on the front end of the pipe material. The rear pipe end rotary punching mechanism 4 is used to perform rotary punching on the rear end of the pipe, and can process the expansion and contraction of the pipe fitting. When the pipe needs to be bent to the right, the clamping die at the lower clamping die of the double-mode right pipe bending machine 5 clamps the pipe for bending. The up and down positions of the round die are adjusted by the up and down conversion cylinder, and the left and right demoulding is adjusted by the left and right cylinders. This device is already in the prior art, so it will not be elaborated here. The translation manipulator 6 is the clamping and conversion station and unloading module of the device, and such a device widely exists in the prior art. The control mechanism 7 is used to control the overall operation of the device.

[0032] As Figure 2 shown, the front pipe end processing mechanism 3 includes a front pipe end hole punching component 301, and a front pipe end rotary punching component 302 is fixed on the side of the front pipe end hole punching component 301. The front pipe end hole punching component 301 completes hole punching processing at the front end of the pipe material. The front pipe end rotary punching component 302 performs rotary punching processing on the front end of the pipe material after hole punching, and seals the front part of the pipe body.

[0033] As Figure 3As shown in the figure, the front pipe end hole punching component 301 includes a hole punching slider 3011 installed on the frame 1. A hole punching fixing plate 3012 is fixed to the upper end of the hole punching slider 3011. A hole punching guide rail 3013 is fixed to the upper end of the hole punching fixing plate 3012. A hole punching support 3014 is fixed to the upper end of the hole punching guide rail 3013. A hole punching motor 3015 is fixed to the front end of the hole punching support 3014. A hole punching front-back displacement cylinder 3016 is fixed to the lower end of the hole punching motor 3015. A hole punching left-right displacement cylinder 3017 is fixed to the side of the hole punching fixing plate 3012. A coupling 3018 is installed at the rear end of the hole punching motor 3015. A hole punching die 3019 is fixed to the rear end of the coupling 3018; a guide rail is fixed to the upper end of the frame 1, and the hole punching slider 3011 is installed at the upper end of the guide rail of the frame 1. The horizontal movement of the hole punching support 3014 is realized through the guide rail, which is used to send the hole punching die 3019 into the tube. And during hole punching, through the horizontal movement of the hole punching die 3019, pressure is applied to the inner wall of the tube to complete hole punching. The hole punching fixing plate 3012 fixes the hole punching guide rail 3013 and the left-right displacement cylinder 3017. The hole punching guide rail 3013 cooperates with the hole punching support 3014. A slider is arranged at the lower end of the hole punching support 3014 to realize the front-back movement of the hole punching support 3014. The hole punching motor 3015 rotates, and the hole punching die 3019 is connected to the hole punching motor 3015 through the coupling 3018. The hole punching motor 3015 drives the hole punching die 3019 to rotate. The hole punching die 3019 can only punch holes in one direction, and the direction of the hole punching 3019 is changed by rotation. The hole punching front-back displacement cylinder 3016 has its front end fixed to the hole punching fixing plate 3012 and the cylinder body fixed to the hole punching motor 3015. Since the hole punching slider 3011 below the hole punching fixing plate 3015 can only move left and right, when the hole punching front-back displacement cylinder 3016 acts, the cylinder body drives the hole punching support 3014 to move back and forth. The cylinder body of the hole punching left-right displacement cylinder 3017 is fixed to the frame 1, and one end of the cylinder is connected to the hole punching fixing plate 3012 to control the left-right displacement of the hole punching die 3019 through expansion and contraction. In the front pipe end processing mechanism 3 of this device, the physical adjacent layout of the hole punching and rotary punching (sealing) processes. The hole punching principle of the hole punching die 3019 is to realize punching through the cooperation of the inclined surface of the inner core rod head and the inclined surface of the punch. As Figure 4 shown, it is divided into three states: the original state: the punch is completely inside the outer sleeve head to ensure that it will not expose the outer sleeve head, otherwise it will scratch the tube. The punching state: the first step of the punch is tangent to the tube. The hole punching state: the tangent line (actual effective height) of the second step of the punch is more than 0.5 higher than the flanging height (at least ensure more than 0.2). And ensure that there is half or more of the contact section between the punch and the inner core rod head, and the third step of the punch cannot contact the inner wall of the tube.

[0034] The process of first drilling and then rotary punching can avoid the positioning error caused by secondary clamping after cooling in traditional step-by-step processing, improve the port size accuracy. Rotary punching immediately after drilling can use the radial pressure during rotary punching to offset the local stress generated by drilling, reducing the overall residual stress of the pipe fitting by more than 40%, reducing the springback amount in the subsequent pipe bending process. It can also use the radial pressure during rotary punching to "cold extrusion repair" the microcracks generated by drilling, reducing the surface roughness of the pipe orifice. Moreover, in existing devices, the front end of the pipe is processed first. After the processing is completed, the drilling die 3019 is inserted from the rear end of the pipe body. Since the holes are all at the front end of the pipe body, the drilling die 3019 is too long and prone to breakage.

[0035] As Figure 5 shown, the blanking mechanism 2 includes a cutting component 201 fixed to the rear end of the drilling component 301. A feeding component 202 is installed at the rear end of the cutting component 201, and a roundness and straightness calibration component 203 is installed at the rear end of the feeding component 202; the cutting component 201 is used to cut the pipe fitting into a fixed length after drilling, facilitating the clamping by the translation manipulator 6 and changing the working position. The feeding component 202 is used to feed the roundness and straightness calibrated pipe material into the drilling component 301 for drilling. The roundness and straightness calibration component 203 calibrates and straightens the initial incoming material, eliminating the bending or ovality deviation of the pipe material when it leaves the factory, providing a high-precision reference for subsequent processing.

[0036] As Figure 6 shown, the roundness and straightness calibration component 203 includes a calibration frame 2031 fixed to the upper end of the frame 1. A calibration plate 2032 is fixed to the upper end of the calibration frame 2031. Horizontal straightening wheels 2033 are installed on the calibration plate 2032. A wheel frame 2034 is fixed to the upper end of the calibration plate 2032, and vertical straightening wheels 2035 are fixed to the side of the wheel frame 2034; the calibration frame 2031 fixes the calibration plate 2032 and the wheel frame 2034 to form a straightening structure framework. The calibration plate 2032 installs horizontal straightening wheels 2033 to extrude the pipe material horizontally and correct the side bending of the pipe material (straightness ≤ 0.2 mm / m). The horizontal straightening wheels 2033 are arranged in pairs to apply pressure to the pipe material through the spacing and straighten the horizontal bending of the pipe material by rolling friction. The wheel frame 2034 installs vertical straightening wheels 2035 to correct the up-and-down bending or ovality of the pipe material. The vertical straightening wheels 2035 cooperate with the horizontal straightening wheels 2033 to form a three-dimensional straightening space, ensuring that the pipe material reaches high-precision straightness and roundness before entering the feeding component.

[0037] As Figure 7As shown in the figure, the feeding component 202 includes a gearbox 2021 fixed to the upper end of the frame 1. A feeding servo 2022 is fixed to the side of the gearbox 2021. A feeding lead screw 2023 is installed on the side of the gearbox 2021. A bearing block 2027 is installed at the end of the feeding lead screw 2023. A sliding block 2024 is installed on the feeding lead screw 2023. A feeding slide rail 2028 is installed at the lower end of the sliding block 2024. A feeding clamping die 2025 is fixed to the upper end of the sliding block 2024. A feeding cylinder 2026 is fixed to the upper end of the feeding clamping die 2025. The gearbox 2021 transmits the power of the feeding servo 2022, and transmits the rotational speed and torque through gears to ensure the stable rotation of the feeding lead screw 2023. The feeding servo 2022 is a high-precision servo motor, receives the instruction of the control mechanism 7, drives the feeding lead screw 2023 to achieve fixed-length feeding. The feeding lead screw 2023 cooperates with the sliding block 2024. A threaded hole is fixed inside the sliding block 2024. The feeding lead screw 2023 converts the rotational motion into the linear motion of the sliding block 2024 through this threaded hole. The sliding block 2024 is installed on the feeding lead screw 2023 and is guided by the feeding slide rail 2028 to drive the feeding clamping die 2025 to move. The feeding clamping die 2025 is driven by the feeding cylinder 2026 to clamp the pipe, and drives the pipe to move during feeding. The feeding clamping die 2025 moves up and down to clamp the pipe. The bearing block 2027 supports the end of the feeding lead screw 2023, reduces the radial runout and friction during the rotation of the lead screw, and extends the service life of the lead screw.

[0038] As Figure 8 shown in the figure, the cutting component 201 includes a cutting mechanism 204, and a breaking and hole-pulling mechanism 205 is installed at the front end of the cutting mechanism 204. The cutting mechanism 2024 is used to cut a breaking port on the outer surface of the pipe, which is not completely cut off, and then is broken by the breaking and hole-pulling mechanism 205.

[0039] As Figure 9As shown in the figure, the cutting mechanism 204 includes a motor fixing plate 2041 fixed to the upper end of the frame 1. A cutting motor 2042 is fixed to the upper end of the motor fixing plate 2041. A pulley 2047 is connected to the output shaft of the cutting motor 2042, and the other end of the pulley is connected to a cutting tool head 2046. A cutting bracket 2043 is fixed to the side of the cutting tool head 2046. A cutting clamp die 2044 is fixed to the upper end of the cutting bracket 2043, and a cutting clamp die cylinder 2045 is installed at the upper end of the cutting clamp die 2044. The motor fixing plate 2041 fixes the cutting motor 2042 to provide an installation reference. The cutting motor 2042 drives the cutting tool head 2046 to rotate at high speed through the pulley 2047 to achieve pipe cutting. The arrangement position of the cutting guide head 2046 is between the cutting clamp die 2044 and the pipe pulling and hole punching mechanism 205. The cutting tool head 2046 directly contacts the pipe and completes the cutting. The cutting method is circumferential cutting, which is carried out outside the pipe body. The cutting bracket 2043 supports the cutting clamp die 2044 to ensure the relative position accuracy between the clamp die and the cutting tool head 2046. Before cutting, the cutting clamp die 2044 is driven by the cutting clamp die cylinder 2045 to clamp the pipe to prevent the pipe from shaking or shifting during cutting.

[0040] As Figure 10 shown in the figure, the pipe pulling and hole punching mechanism 205 includes a pipe pulling and hole punching clamp die action block 2052 fixed to the hole punching bracket 3014. An action block guide rail 2051 is arranged at the lower end of the pipe pulling and hole punching clamp die action block 2052. A pipe pulling and hole punching clamp die cylinder 2053 is arranged at the lower end of the pipe pulling and hole punching clamp die action block 2052. A pipe pulling and hole punching clamp die 2054 is arranged inside the pipe pulling and hole punching clamp die action block 2052. The action block guide rail 2051 provides linear motion guidance for the pipe pulling and hole punching clamp die action block 2052 to ensure smooth and non-shaking movement. The pipe pulling and hole punching clamp die action block 2052 is connected to the frame 1 through a connecting block. The pipe pulling and hole punching clamp die cylinder 2053 drives the clamp die action block 2052 to move, clamping the pipe pulling and hole punching clamp die 2054 left and right. The clamp die action block 2052 converts the up and down movement of the cylinder into the power to drive the left and right movement of the pipe pulling and hole punching clamp die 2054. This action block 2052 has existing mature technologies. The pipe pulling and hole punching clamp die 2054 realizes the dual functions of "pulling the pipe after cutting" and "fixing the front end of the pipe during hole punching". It greatly reduces the number of pipe body clamp dies and reduces the scratch defects on the outside of the pipe body.

[0041] Working principle:

[0042] The initial pipe is processed by the roundness and straightness correction component 203: the horizontal straightening wheels 2033 squeeze the pipe in pairs to correct the side bending in the horizontal direction (straightness ≤ 0.2 mm / m); the vertical straightening wheels 2035 cooperate to correct the up-and-down bending or ovality, and through three-dimensional straightening, high-precision straightness and roundness of the pipe are ensured. After the pipe body passes through the feeding clamping die 2025, it is clamped and advanced forward by the feeding component 202 and pushed into the front pipe end hole punching component 301. At this time, the cutting clamping die 2044 is in an open state, and the pipe body passes through the cutting clamping die 2044. At this time, the front pipe end hole punching component 301 starts to punch holes. The pipe body is clamped by the feeding clamping die 2025 to prevent rotation and clamped by the cutting clamping die 2044 to prevent the front end from bending. The hole punching motor 3015 rotates the hole punching die 3019 to start punching holes. After the punching is completed, the cutting clamping die 2044 clamps the pipe body for circumferential cutting. After the circumferential cutting, the cylinder connected to the frame 1 on the cutting mechanism 204 is used for breaking. Then, it is sequentially placed into the front pipe end rotary punching component 302 by the translation manipulator 6 for rotary punching, placed into the rear pipe end rotary punching mechanism 4 for rotary punching, and placed into the double-mode right bending pipe machine 5 for pipe bending and then unloaded.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A numerical control pipe bending integrated machine for punching holes at the end of a cutting pipe, characterized in that, It includes a frame (1), a blanking mechanism (2) is fixed at the upper end of the frame (1), a front pipe end processing mechanism (3) is fixed at the front end of the blanking mechanism (2), a rear pipe end rotary punching mechanism (4) is fixed at the side of the front pipe end processing mechanism (3), a double-mode right bending pipe machine (5) is fixed at the side of the rear pipe end rotary punching mechanism (4), a translation manipulator (6) is fixed at the upper end of the frame (1), and a control mechanism (7) is placed beside the frame (1); The front pipe end processing mechanism (3) includes a front pipe end hole drawing component (301), and a front pipe end rotary punching component (302) is fixed at the side of the front pipe end hole drawing component (301); The front pipe end hole drawing component (301) includes a hole drawing slider (3011) installed on the frame (1), a hole drawing fixing plate (3012) is fixed at the upper end of the hole drawing slider (3011), a hole drawing guide rail (3013) is fixed at the upper end of the hole drawing fixing plate (3012), a hole drawing bracket (3014) is fixed at the upper end of the hole drawing guide rail (3013), a hole drawing motor (3015) fixed at the front end of the hole drawing bracket (3014), a hole drawing front and rear displacement cylinder (3016) is fixed at the lower end of the hole drawing motor (3015), a hole drawing left and right displacement cylinder (3017) is fixed at the side of the hole drawing fixing plate (3012), a coupling (3018) is installed at the rear end of the hole drawing motor (3015), and a hole drawing die (3019) is fixed at the rear end of the coupling (3018).

2. The numerically controlled pipe bending integrated machine for end punching of a cutting pipe according to claim 1, wherein The blanking mechanism (2) includes a cutting component (201) fixed at the rear end of the hole drawing component (301), a feeding component (202) is installed at the rear end of the cutting component (201), and a roundness and straightness calibration component (203) is installed at the rear end of the feeding component (202).

3. The numerically controlled pipe bending integrated machine for end hole punching of a cutting pipe according to claim 2, characterized in that, The roundness and straightness calibration component (203) includes a calibration frame (2031) fixed at the upper end of the frame (1), a calibration plate (2032) is fixed at the upper end of the calibration frame (2031), a horizontal straightening wheel (2033) is installed on the calibration plate (2032), a wheel frame (2034) is fixed at the upper end of the calibration plate (2032), and a vertical straightening wheel (2035) is fixed at the side of the wheel frame (2034).

4. The numerically controlled pipe bending integrated machine for end punching of a cutting pipe according to claim 2, characterized in that, The feeding component (202) includes a gear box (2021) fixed at the upper end of the frame (1), a feeding servo (2022) is fixed at the side of the gear box (2021), a feeding lead screw (2023) is installed at the side of the gear box (2021), a bearing seat (2027) is installed at the end of the feeding lead screw (2023), a sliding seat (2024) is installed on the feeding lead screw (2023), a feeding slide rail (2028) is installed at the lower end of the sliding seat (2024), a feeding clamping die (2025) is fixed at the upper end of the sliding seat (2024), and a feeding cylinder (2026) is fixed at the upper end of the feeding clamping die (2025).

5. A numerical control bending machine for end hole punching of a cutting pipe according to claim 2, characterized in that, The cutting component (201) includes a cutting mechanism (204), and a breaking and hole drawing mechanism (205) is installed at the front end of the cutting mechanism (204).

6. The numerical control pipe bending integrated machine for end punching of cutting pipe according to claim 5, wherein The cutting mechanism (204) includes a motor fixing plate (2041) fixed to the upper end of the frame (1). A cutting motor (2042) is fixed to the upper end of the motor fixing plate (2041). A pulley (2047) is connected to the output shaft of the cutting motor (2042). The other end of the pulley is connected to a cutting tool head (2046). A cutting bracket (2043) is fixed to the side of the cutting tool head (2046). A cutting clamping die (2044) is fixed to the upper end of the cutting bracket (2043). A cutting clamping die cylinder (2045) is installed on the upper end of the cutting clamping die (2044).

7. A numerical control pipe bending integrated machine for punching the end of a cutting pipe according to claim 5, characterized in that, The breaking and punching mechanism (205) includes a breaking and punching clamping die action block (2052) fixed to a punching bracket (3014). A moving block guide rail (2051) is arranged at the lower end of the breaking and punching clamping die action block (2052). A breaking and punching clamping die cylinder (2053) is arranged at the lower end of the breaking and punching clamping die action block (2052). A breaking and punching clamping die (2054) is arranged inside the breaking and punching clamping die action block (2052).

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