Multi-station automatic pipe drawing machine based on servo electric cylinder and control method of multi-station automatic pipe drawing machine

Abstract

The invention provides a multi-station automatic pipe drawing machine based on a servo electric cylinder and a control method of the multi-station automatic pipe drawing machine, and relates to the technical field of metal forming machine tools, the multi-station automatic pipe drawing machine comprises an equipment base frame and a to-be-machined workpiece, and further comprises a linear sliding limiting assembly and a servo electric cylinder, a guide rail sliding block is slidably connected to the outer side of the linear guide rail, a positioning bearing column is fixedly connected to the top end of the guide rail sliding block, and the interior of the positioning bearing column makes contact with the outer side of a workpiece to be machined, so that multi-station switching and rotary positioning of the workpiece are achieved, and the labor cost and the energy consumption cost of a unit product are remarkably reduced; in order to overcome the industrial defects that in the prior art, due to manual clamping and frequent starting and stopping, the production efficiency is low, and continuous operation cannot be achieved, the waiting time of traditional equipment is eliminated, and the core bottleneck of large-scale automatic production is solved.

Description

Technical Field

[0001] This invention relates to the field of metal forming machine tool technology, and in particular to a multi-station automatic tube drawing machine based on a servo electric cylinder and its control method. Background Technology

[0002] Tube drawing, a key technology in metal tube forming, is widely used in aerospace, automotive manufacturing, air conditioning and refrigeration, and precision instruments to achieve precision forming such as diameter reduction, wall reduction, or end necking of tubes. With the increasing demands of modern industry for processing precision, surface quality, and production efficiency of thin-walled tubes; The existing technology typically employs a manual or semi-automatic approach. Operators manually load the pipe to be processed into the fixture, using an external three- or four-jaw chuck for single-point clamping and positioning from the outside of the pipe. Subsequently, a hydraulic cylinder or screw drives the pulling mold to feed along a fixed track, completing a single pipe pulling operation. After processing, the machine is stopped to unload the material, and the next workpiece is re-clamped and the above process is repeated. For workpieces of different diameters, it is necessary to stop the machine to change the fixture or manually adjust the position of the positioning block. Therefore, to address the above problems, a multi-station automatic tube drawing machine based on a servo electric cylinder and its control method are proposed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-station automatic tube drawing machine based on a servo electric cylinder and its control method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-station automatic tube drawing machine based on a servo electric cylinder, comprising a machine base frame and a workpiece to be processed, and further comprising: A linear sliding limit assembly includes a linear guide rail fixedly connected to the base frame of the equipment, a guide rail slider slidably connected to the outer side of the linear guide rail, a positioning support column fixedly connected to the top of the guide rail slider, and the interior of the positioning support column contacting the outer side of the workpiece to be processed. A rotary positioning execution component includes a drive unit bracket fixedly connected to the equipment base frame. A servo drive motor is installed inside the drive unit bracket. A transmission shaft is fixedly connected to the drive end of the servo drive motor. A positioning turntable is fixedly connected to the outside of the transmission shaft. A linear feed drive assembly includes a second servo drive motor fixedly connected to a guide rail slider. A transmission gear is fixedly connected to the drive end of the second servo drive motor. A meshing rack is fixedly connected to the top of the equipment base frame. The transmission gear and the meshing rack are meshed together.

[0005] In a preferred embodiment, the guide rail slider of the linear sliding limiting assembly slides along the axial direction of the linear guide rail, and the positioning bearing column is vertically fixed to the top of the guide rail slider and forms a limiting surface on the outer wall of the workpiece.

[0006] In a preferred embodiment, the positioning turntable of the rotary positioning execution component is coaxially fixed to the end of the transmission shaft, and the servo drive motor is cantilevered to the equipment base frame via a drive unit bracket.

[0007] In a preferred embodiment, the servo drive motor of the linear feed drive assembly moves synchronously with the guide rail slider, and the transmission gear and the fixed meshing rack form a gear and rack linear drive pair.

[0008] In a preferred embodiment, the positioning turntable has a guide groove inside, and a follower positioning column is movably connected to the guide groove.

[0009] In a preferred embodiment, the follower positioning column is radially adjustable in the guide groove along the positioning turntable, and the end of the follower positioning column is engaged with the positioning hole of the workpiece to be processed.

[0010] In a preferred embodiment, the equipment base frame is a rectangular truss structure, and the meshing rack is arranged parallel to the linear guide rail on the top crossbeam of the equipment base frame.

[0011] In a preferred embodiment, the servo drive motor one and the servo drive motor two are controlled independently, respectively driving the rotary positioning execution component and the linear feed drive component to coordinate their actions. In a preferred embodiment, the workpiece support adjustment assembly is further included. The workpiece support adjustment assembly includes a support adjustment groove formed on the positioning turntable. A support adjustment rod is slidably connected to the support adjustment groove. A workpiece support plate is fixedly connected to the outer side of the support adjustment rod. The outer arc surface of the workpiece support plate contacts the inner wall of the workpiece to be processed. The support adjustment rod is radially locked and positioned within the support adjustment groove by a locking member.

[0012] An operation method for a multi-station automatic tube-drawing machine based on a servo electric cylinder, according to any one of claims 1-9, specifically includes the following steps: S1. The equipment base frame is fixedly installed on the ground, which provides a rigid installation reference for the linear guide rail, drive unit bracket and meshing rack, thus constructing a stable support platform for the whole machine. This ensures the relative position accuracy of each moving component and the accuracy of the force transmission path, and realizes the structural foundation for the stable operation of the multi-station automatic pipe drawing machine. S2. Once the servo drive motor of the rotary positioning execution component starts to rotate, it drives the transmission shaft to rotate, which in turn drives the positioning turntable fixedly connected to its outer side to rotate synchronously. This causes the follower positioning column and workpiece support plate installed on the turntable to revolve around the central axis, realizing the multi-station switching and rotary positioning function of the workpiece. S3. The servo drive motor 2 of the linear feed drive component starts to rotate, which in turn drives the transmission gear at its drive end to rotate. This drives the transmission gear to mesh and roll with the meshing rack fixed at the top of the base frame, thereby driving the guide rail slider that carries the servo drive motor 2 to slide axially along the linear guide rail, realizing the axial feed and pulling motion of the workpiece. S4. The support adjustment rod of the workpiece support adjustment assembly slides radially along the support adjustment groove, thereby driving the workpiece support plate fixedly connected to its outer side to move synchronously. This allows the outer arc surface of the workpiece support plate to contact the inner wall of the workpiece to be processed, thus forming a double-sided support with the positioning bearing column, achieving rigid clamping and deformation suppression in the thin-walled pipe processing process. S5. The guide rail slider of the linear sliding limit assembly slides along the linear guide rail under the linear feed drive, which in turn drives the positioning bearing column fixed to the top of the guide rail slider to move synchronously, thereby allowing the positioning bearing column to move inward. The cavity of the part contacts the outer surface of the workpiece to be processed, thereby constraining the radial degree of freedom of the workpiece and providing external support force, realizing the stable bearing and precise guiding and limiting of the workpiece.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. By driving the transmission shaft to rotate through the servo drive motor, the positioning turntable will rotate continuously around the central axis, so that the follow-up positioning column installed on the turntable and the workpiece support plate will rotate synchronously, realizing multi-station switching and rotational positioning of the workpiece, which significantly reduces the labor cost and energy consumption cost per unit product. It addresses the industry pain points of manual clamping and frequent start-stop caused by low production efficiency and inability to achieve continuous operation in existing technologies, eliminates the waiting time of traditional equipment, and solves the core bottleneck of mass automated production. 2. By sliding the support adjustment rod radially along the support adjustment groove, the inner arc surface of the workpiece support plate is driven to contact the inner wall of the workpiece to be processed, forming a double-sided cooperative support structure with the outer limiting surface of the positioning bearing column, which significantly improves the product yield of high-end precision pipe fittings, solves the deformation control problem, and enables the equipment to process ultra-thin pipe fittings with thinner wall thickness. 3. By driving the servo motor and the transmission gear of the servo motor to mesh and roll with the fixed meshing rack, the guide rail slider of the carrying motor is driven to achieve closed-loop precise feeding along the linear guide rail. The feeding speed and position can be dynamically adjusted in real time. This design achieves the matching of the pulling force and the process curve, shortens the changeover and debugging time, and eliminates the need to replace the mechanical cam or hydraulic valve group. It solves the key problems of poor flexibility, unstable quality and long debugging cycle of traditional processes, and enables the equipment to seamlessly switch to produce pipe fittings of different specifications. Attached Figure Description

[0014] Figure 1 is a perspective view of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention; Figure 2 is a schematic diagram of the positioning support column structure of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention; Figure 3 is a schematic diagram of the linear feed drive component of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention. Figure 4 shows the rotary positioning of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention. Execution component diagram; Figure 5 is a schematic diagram of the guide groove structure of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention; Figure 6 is a schematic diagram of the workpiece support adjustment assembly of a multi-station automatic tube drawing machine based on a servo electric cylinder provided by the present invention. Figure 7 is a flowchart of a control method for a multi-station automatic tube drawing machine based on a servo electric cylinder.

[0015] Legend; 1. Equipment base frame; 2. Linear sliding limit assembly; 21. Linear guide rail; 22. Guide rail slider; 23. Positioning support column; 3. Rotary positioning execution assembly; 31. Drive unit bracket; 32. Servo drive motor one; 33. 34. Transmission shaft; 35. Positioning turntable; 36. Guide groove; 37. Follow-up positioning column; 4. Linear feed drive assembly; 41. Servo drive motor II; 42. Transmission gear; 43. Meshing rack; 5. Workpiece support adjustment assembly; 51. Support adjustment groove; 52. Support adjustment rod; 53. Workpiece support bracket; 6. Workpiece to be processed. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] As shown in Figures 1 and 2, this embodiment provides a technical solution: a multi-station automatic tube drawing machine based on a servo electric cylinder and its control method, including a machine base frame 1 and a workpiece 6 to be processed, and also including a linear sliding limit assembly 2. The linear sliding limit assembly 2 includes a linear guide rail 21 fixedly connected to the machine base frame 1, and a guide rail slider 22 slidably connected to the outer side of the linear guide rail 21. The top end of the guide rail slider 22 is fixedly connected to a positioning support column 23, and the inside of the positioning support column 23 is in contact with the outside of the workpiece 6 to be processed. The equipment base frame 1 serves as the load-bearing foundation for the entire machine, providing a rigid installation reference for core structures such as the linear sliding limit component 2 and the rotary positioning execution component 3, realizing the spatial positioning and force transmission connection of each component. The linear guide rail 21 provides a high-precision linear guiding path, constraining the movement trajectory of the guide rail slider 22. The guide rail slider 22 carries the positioning support column 23 and slides along the guide rail, realizing the translation of the workpiece support structure. The positioning support column 23 fits against the surface of the workpiece 6 to be processed from the outside, forming a radial limiting support. like Figure 4 - Figure 6 As shown, the rotary positioning execution component 3 includes a drive unit bracket 31 fixedly connected to the equipment base frame 1. A servo drive motor 32 is installed inside the drive unit bracket 31. A transmission shaft 33 is fixedly connected to the drive end of the servo drive motor 32. A positioning turntable 34 is fixedly connected to the outside of the transmission shaft 33. A guide groove 35 is opened inside the positioning turntable 34. A follower positioning column 36 is movably connected to the guide groove 35. The drive unit bracket 31 fixes the servo drive motor 32 to counteract the torque reaction force during motor operation. The servo drive motor 32 provides controllable rotational power. The angular velocity control of the positioning turntable 34 is achieved by speed adjustment. The transmission shaft 33 transmits the motor power to the positioning turntable 34 to ensure torque transmission efficiency. The positioning turntable 34 serves as a rotation execution carrier and integrates the guide groove 35 and the mounting base of the support adjustment component. The guide groove 35 constrains the movement trajectory of the follower positioning column 36 to adapt to the positioning requirements of workpieces with different diameters. The follower positioning column 36 slides along the guide groove 35 to achieve radial position adjustment and assist in workpiece centering. like Figure 2 As shown in Figure 3, the linear feed drive assembly 4 includes a servo drive motor 41 fixedly connected to the guide rail slider 22. The drive end of the servo drive motor 41 is fixedly connected to a transmission gear 42. The top end of the equipment base frame 1 is fixedly connected to a meshing rack 43. The transmission gear 42 and the meshing rack 43 are meshed together. The linear feed drive assembly 4 and the servo drive motor 2 41 provide linear feed power. The feed speed is adjusted by speed control. The transmission gear 42 meshes with the meshing rack 43 to convert the motor rotational motion into linear motion. The meshing rack 43 is fixed to the base frame to provide a reference track for gear transmission. like Figure 4 and Figure 6 As shown, the workpiece support adjustment assembly 5 includes a support adjustment groove 51 formed on the positioning turntable 34, a support adjustment rod 52 slidably connected to the support adjustment groove 51, a workpiece support plate 53 fixedly connected to the outer side of the support adjustment rod 52, and the outer side of the workpiece support plate 53 in contact with the inner wall of the workpiece 6 to be processed. The workpiece support adjustment assembly 5 and the support adjustment groove 51 provide a sliding track for the support adjustment rod 52, enabling radial position adjustment. The support adjustment rod 52 connects the adjustment groove and the support support plate, transmitting support force and achieving position adjustment. The workpiece support support plate 53 fits the workpiece to be processed from the inner wall. The comprehensive advantages of the adaptive design are achieved by using multiple components such as outer limit, inner support, rotary positioning and linear feed to solve the problems of inaccurate positioning, poor adaptability and excessive manual intervention in traditional tube extraction equipment. This achieves full automation and high precision in the tube extraction process, reducing downtime and labor costs.

[0018] An operation method for a multi-station automatic tube drawing machine based on a servo electric cylinder includes the following steps: S1. The equipment base frame 1 is fixedly installed on the ground, which provides a rigid installation reference for the linear guide rail 21, drive unit bracket 31 and meshing rack 43, thus constructing a stable support platform for the whole machine, thereby ensuring the relative position accuracy of each moving component and the accuracy of the force transmission path, realizing the structural foundation for the stable operation of the multi-station automatic pipe drawing machine. S2. The servo drive motor 32 of the rotary positioning execution component 3 starts to rotate, which in turn drives the transmission shaft 33 to rotate, thereby driving the positioning turntable 34 fixedly connected to its outer side to rotate synchronously. This causes the follower positioning column 36 and the workpiece support plate 53 installed on the turntable to revolve around the central axis, realizing the multi-station switching and rotary positioning function of the workpiece. S3. The servo drive motor 41 of the linear feed drive assembly 4 starts to rotate, which in turn drives the transmission gear 42 at its drive end to rotate. This drives the transmission gear 42 to mesh and roll with the meshing rack 43 fixed at the top of the base frame, thereby driving the guide rail slider 22 that carries the servo drive motor 41 to slide axially along the linear guide rail 21, realizing the axial feed and pulling motion of the workpiece. S4. The support adjustment rod 52 of the workpiece support adjustment assembly 5 slides radially along the support adjustment groove 51, thereby driving the workpiece support plate 53 fixedly connected to its outer side to move synchronously, thus enabling the workpiece support... The outer arc surface of the support plate 53 contacts the inner wall of the workpiece 6 to be processed, thereby forming a double-sided support with the positioning bearing column 23, realizing rigid clamping and deformation suppression in the thin-walled tube processing process; S5. The guide rail slider 22 of the linear sliding limit assembly 2 slides along the linear guide rail 21 under the linear feed drive, which in turn drives the positioning bearing column 23 fixed at the top of the guide rail slider 22 to move synchronously. This allows the internal cavity of the positioning bearing column 23 to contact the outer surface of the workpiece 6 to be processed, thereby constraining the radial degree of freedom of the workpiece and providing external support force, realizing the stable bearing and precise guiding limit of the workpiece.

[0019] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-station automatic tube drawing machine based on a servo electric cylinder, comprising a base frame (1) and a workpiece (6) to be processed, characterized in that, Also includes: A linear sliding limit assembly (2) includes a linear guide rail (21) fixedly connected to the base frame (1) of the equipment. A guide rail slider (22) is slidably connected to the outer side of the linear guide rail (21). A positioning support column (23) is fixedly connected to the top of the guide rail slider (22). The interior of the positioning support column (23) is in contact with the outer side of the workpiece (6) to be processed. The rotary positioning execution component (3) includes a drive unit bracket (31) fixedly connected to the equipment base frame (1). A servo drive motor (32) is installed inside the drive unit bracket (31). A transmission shaft (33) is fixedly connected to the drive end of the servo drive motor (32). A positioning turntable (34) is fixedly connected to the outside of the transmission shaft (33). The linear feed drive assembly (4) includes a servo drive motor 2 (41) fixedly connected to the guide rail slider (22). The drive end of the servo drive motor 2 (41) is fixedly connected to a transmission gear (42). The top of the equipment base frame (1) is fixedly connected to a meshing rack (43). The transmission gear (42) and the meshing rack (43) are meshed.

2. The multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 1, characterized in that, The guide rail slider (22) of the linear sliding limiting assembly (2) slides along the axial direction of the linear guide rail (21), and the positioning bearing column (23) is vertically fixed to the top of the guide rail slider (22) and forms the workpiece outer wall limiting surface.

3. The multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 1, characterized in that, The positioning turntable (34) of the rotary positioning execution component (3) is coaxially fixed to the end of the transmission shaft (33), and the servo drive motor (32) is cantilevered on the equipment base frame (1) through the drive unit bracket (31).

4. The multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 1, characterized in that, The servo drive motor 2 (41) of the linear feed drive assembly (4) moves synchronously with the guide rail slider (22), and the transmission gear (42) and the fixed meshing rack (43) form a gear and rack linear drive pair.

5. A multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 3, characterized in that, The positioning turntable (34) has a guide groove (35) inside, and a follower positioning column (36) is movably connected to the guide groove (35).

6. A multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 5, characterized in that, The follower positioning column (36) is radially adjustable in the guide groove (35) along the positioning turntable (34), and the end of the follower positioning column (36) is matched with the positioning hole of the workpiece (6) to be processed.

7. A multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 1, characterized in that, The equipment base frame (1) is a rectangular truss structure, and the meshing rack (43) is arranged parallel to the linear guide rail (21) on the top crossbeam of the equipment base frame (1).

8. A multi-station automatic tube drawing machine based on a servo electric cylinder according to claim 1, characterized in that, The servo drive motor one (32) and servo drive motor two (41) are independently controlled, respectively driving the rotary positioning execution component (3) and the linear feed drive component (4) to coordinate their actions.

9. A multi-station automatic tube drawing machine based on a servo electric cylinder according to any one of claims 8, characterized in that, It also includes a workpiece support adjustment assembly (5), which includes a support adjustment groove (51) opened on the positioning turntable (34), a support adjustment rod (52) slidably connected to the support adjustment groove (51), a workpiece support plate (53) fixedly connected to the outside of the support adjustment rod (52), the outer arc surface of the workpiece support plate (53) contacting the inner wall of the workpiece (6) to be processed, and the support adjustment rod (52) being radially locked and positioned in the support adjustment groove (51) by a locking member.

10. An operation method for a multi-station automatic tube-drawing machine based on a servo electric cylinder, as described in any one of claims 1-9, characterized in that... Specifically, the following steps are included: S1. The equipment base frame (1) is fixedly installed on the ground, which provides a rigid installation reference for the linear guide rail (21), drive unit bracket (31) and meshing rack (43), thus constructing a stable support platform for the whole machine, thereby ensuring the relative position accuracy of each moving component and the accuracy of the force transmission path, and realizing the structural foundation for the stable operation of the multi-station automatic pipe drawing machine. S2. The servo drive motor (32) of the rotary positioning execution component (3) starts to rotate, which in turn drives the transmission shaft (33) to rotate, which in turn drives the positioning turntable (34) fixedly connected to its outer side to rotate synchronously, thereby driving the follower positioning column (36) and workpiece support plate (53) installed on the turntable to revolve around the central axis, realizing the multi-station switching and rotary positioning function of the workpiece. S3. The servo drive motor 2 (41) of the linear feed drive assembly (4) starts to rotate, which in turn drives the transmission gear (42) at its drive end to rotate. This drives the transmission gear (42) to mesh and roll with the meshing rack (43) fixed at the top of the base frame, thereby driving the guide rail slider (22) that carries the servo drive motor 2 (41) to slide axially along the linear guide rail (21), thus realizing the axial feed of the workpiece to the pulling motion. S4. The support adjustment rod (52) of the workpiece support adjustment assembly (5) slides radially along the support adjustment groove (51), thereby driving the workpiece support plate (53) fixedly connected to its outer side to move synchronously, so that the outer arc surface of the workpiece support plate (53) can contact the inner wall of the workpiece (6) to be processed, thereby forming a double-sided cooperative support with the positioning bearing column (23), realizing rigid clamping and deformation suppression in the thin-walled pipe processing process; S5. The guide rail slider (22) of the linear sliding limit assembly (2) slides along the linear guide rail (21) under the linear feed drive, and then drives the positioning bearing column (23) fixed at the top of the guide rail slider (22) to move synchronously, so that the internal cavity of the positioning bearing column (23) can contact the outer surface of the workpiece (6) to be processed, thereby constraining the radial degree of freedom of the workpiece and providing external support force, realizing the stable bearing and precise guidance and limit of the workpiece.

Images