A rod feeding device

Abstract

The application discloses a preform feeding device and belongs to the technical field of optical fiber manufacturing equipment. The preform feeding device comprises a base plate, a screw rod rotatably installed on the base plate, a screw rod nut sleeved on the screw rod and threadedly matched with the screw rod, a clamping assembly connected with the screw rod nut and used for clamping a preform, a first driving assembly used for driving the screw rod to rotate, and a second driving assembly used for driving the screw rod nut to rotate. The clamping assembly and the screw rod nut are relatively rotatable in the circumferential direction of the screw rod nut, and the clamping assembly and the screw rod nut are limitingly matched in the axial direction of the screw rod nut. The rotation direction of the first driving assembly is the same as or opposite to the rotation direction of the second driving assembly. The preform feeding device can realize high speed and low speed by separately starting the first driving assembly or the second driving assembly, and can realize wide-range and high-precision speed adjustment by synchronously coordinating the first driving assembly and the second driving assembly and utilizing the rotation speed difference and the rotation direction difference.

Description

Technical Field

[0001] This application relates to the field of optical fiber fabrication equipment technology, and in particular to a rod feeding device. Background Technology

[0002] Currently, optical fiber fabrication equipment is equipped with a preform feeding device on the drawing tower. Its main function is to accurately and stably feed the optical fiber preform into the heating furnace. During normal fiber drawing, the preform needs to be fed in at an extremely low speed (snail's pace), which is closely related to the production speed and the cross-sectional area of ​​the preform. When the production speed remains constant, the larger the cross-sectional area of ​​the preform, the lower the required feeding speed. However, in non-normal production stages such as preform removal, clamping, fine-tuning, or equipment maintenance, the feeding device needs to operate at a higher speed to improve efficiency. The difference between snail's pace and high speed can typically be tens or even thousands of times.

[0003] However, most bar feeding devices use a single servo motor to directly drive the moving parts and rely on a servo system for speed regulation, but this method has a small speed regulation range. To expand the speed regulation range, some devices have introduced mechanical structures such as clutches and gearboxes; however, these solutions often result in a complex overall structure, large space occupation, and high difficulty in operation and maintenance.

[0004] Therefore, how to provide a rod feeding device that can stably adjust between slow and high speeds without occupying too much space is a problem that urgently needs to be solved. Utility Model Content

[0005] This application provides a rod feeding device, including: a base plate; a lead screw rotatably mounted on the base plate; a lead screw nut sleeved on the lead screw and threadedly engaged with it; a clamping assembly connected to the lead screw nut and used to clamp the preform; a first driving assembly and a second driving assembly, the first driving assembly driving the lead screw to rotate, and the second driving assembly driving the lead screw nut to rotate. The clamping assembly and the lead screw nut are rotatable relative to each other in the circumferential direction of the lead screw nut, and are in a limiting engagement with each other in the axial direction of the lead screw nut. The rotation directions of the first driving assembly and the second driving assembly are the same or opposite.

[0006] In some embodiments, the bar feeding device further includes a synchronization component, one end of which is connected to the drive end of the second drive component, and the other end of which is connected to a lead screw nut.

[0007] In some embodiments, the synchronization component includes: a first timing pulley connected to the drive end of the second drive component; a second timing pulley sleeved on the lead screw and connected to the lead screw nut; and a timing belt sleeved on the outer periphery of the first timing pulley and the second timing pulley.

[0008] In some embodiments, the first drive assembly includes: a first servo motor, a first reducer, and a coupling, wherein the first servo motor is connected to the coupling via the first reducer, and the coupling is fixedly connected to a lead screw; the second drive assembly includes: a second servo motor and a second reducer, wherein the second servo motor is connected to a lead screw nut via the second reducer.

[0009] In some embodiments, the reduction ratio of the first reducer is 1:3; the reduction ratio of the second reducer is 1:100.

[0010] In some embodiments, the first drive component and the second drive component are located on the same side of the clamping component.

[0011] In some embodiments, the bar feeding device further includes a sliding part disposed on the base plate; the clamping assembly includes a slide block connected to a lead screw nut; and a slider, wherein the slide block is slidably connected to the sliding part via the slider.

[0012] In some embodiments, the number of sliding parts is multiple, and at least one sliding part is provided on each of the opposite sides of the slide block.

[0013] In some embodiments, the rod feeding device further includes a control component, which is communicatively connected to the first drive component and the second drive component; the reduction ratio of the second drive component is greater than the reduction ratio of the first drive component; when the rod feeding device is in a slow speed state, the control component controls the second drive component to start, the first drive component does not start, and the moving speed of the preform is the rotational speed of the drive end of the second drive component; when the rod feeding device is in a high speed state, the control component controls the first drive component to start, the second drive component does not start, and the moving speed of the preform is the rotational speed of the drive end of the first drive component.

[0014] In some embodiments, the rod feeding device further includes a control component, which is communicatively connected to the first drive component and the second drive component; the reduction ratio of the second drive component is equal to the reduction ratio of the first drive component; when the rod feeding device is in a slow-speed state, the control component controls the first drive component and the second drive component to start simultaneously, the first drive component and the second drive component rotate in opposite directions, and the moving speed of the preform is the sum of the rotational speeds of the drive ends of the first drive component and the second drive component; when the rod feeding device is in a high-speed state, the control component controls the first drive component and the second drive component to start simultaneously, the first drive component and the second drive component rotate in the same direction, and the moving speed of the preform is the sum of the rotational speeds of the drive ends of the first drive component and the second drive component.

[0015] Compared with existing technologies, the bar feeding device of this application controls the rotation of the lead screw by setting a first drive component and controls the rotation of the lead screw nut by setting a second drive component. The first and second drive components, with different rotational speeds, can be activated at different times to switch between slow and high speeds. For example, at slow speeds, only the second drive component is activated, and at high speeds, only the first drive component is activated. Alternatively, both the first and second drive components can be activated simultaneously, and the switching between slow and high speeds is achieved by the difference in rotational speed and direction at the drive ends of the first and second drive components. This bar feeding device provides two speed control methods: time-sharing activation and coordinated drive. It does not require additional mechanical structures such as clutches or gearboxes. High and low speeds can be achieved by activating the first or second drive component individually, or by synchronously coordinating the two drives, utilizing the difference in rotational speed and direction to achieve a wide range and high precision speed adjustment. This solves the technical problems of limited speed range, instability at low speeds, and complex structure and large space occupation of traditional bar feeding devices. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a rod feeding device provided in an embodiment of this application;

[0017] Figure 2 This is a partial structural diagram of a rod feeding device provided in an embodiment of this application;

[0018] Figure 3 This is a partial structural diagram of a rod feeding device provided in an embodiment of this application;

[0019] Figure 4 A schematic diagram of the structure of a first driving component of a rod feeding device provided in an embodiment of this application;

[0020] Figure 5 A schematic diagram of the structure of the second drive component of a rod feeding device provided in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of the lead screw structure of a rod feeding device provided in an embodiment of this application.

[0022] Figure label:

[0023] 1. Base plate; 2. Lead screw; 3. Lead screw nut; 4. Clamping assembly; 41. Slide; 411. Connecting sleeve; 42. Two-dimensional fine-tuning mechanism; 43. Gripper mechanism; 5. First drive assembly; 51. First servo motor; 52. First reducer; 53. Coupling; 6. Second drive assembly; 61. Second servo motor; 62. Second reducer; 7. Synchronization assembly; 71. First synchronous pulley; 72. Second synchronous pulley; 73. Synchronous belt; 8. Slider; 9. Preform; 10. First mounting base; 11. Second mounting base; 12. Sliding part; X, first direction; Y, second direction. Detailed Implementation

[0024] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0025] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0026] like Figures 1-6 As shown in the figure, this application provides a rod feeding device, including: a base plate 1; a lead screw 2, which is rotatably mounted on the base plate 1; a lead screw nut 3, which is sleeved on the lead screw 2 and threadedly engaged with the lead screw; a clamping assembly 4, which is connected to the lead screw nut 3 and is used to clamp the preform rod 9; a first driving assembly 5 and a second driving assembly 6, wherein the first driving assembly 5 is used to drive the lead screw 2 to rotate, and the second driving assembly 6 is used to drive the lead screw nut 3 to rotate. In the circumferential direction of the lead screw nut 3, the clamping assembly 4 and the lead screw nut 3 are rotatable relative to each other, and in the axial direction of the lead screw nut 3, the clamping assembly 4 and the lead screw nut 3 are in a limiting engagement; wherein the rotation direction of the first driving assembly 5 is the same as or opposite to the rotation direction of the second driving assembly 6.

[0027] In one possible scenario, the base plate 1 serves as the mounting base for the entire device, and can be fixed to the wire drawing tower, providing structural support and a mounting surface. The lead screw 2 is rotatably mounted on the base plate 1 via a bearing housing, with its axis aligned with the feeding direction of the precast bar 9. The lead screw nut 3 is sleeved on the outer circumference of the lead screw 2, engaging with the lead screw thread, and can move axially along the lead screw 2 while simultaneously rotating around its axis.

[0028] The clamping assembly 4 may include a slide 41, a two-dimensional fine-tuning mechanism 42, and a gripper mechanism 43. The slide 41 serves as a support platform, mounting and supporting the two-dimensional fine-tuning mechanism 42 and the gripper mechanism 43, allowing the assembly to move axially synchronously with the lead screw nut 3, thus enabling the feeding or retraction of the preform 9. The two-dimensional fine-tuning mechanism 42 adjusts the position of the gripper mechanism 43 in either the first direction X or the second direction Y, achieving precise centering and angle correction of the preform 9 during clamping, improving wire drawing accuracy and stability. The gripper mechanism 43 directly clamps and releases the preform 9. The gripper mechanism 43 and the two-dimensional fine-tuning mechanism 42 are commonly used devices in the wire drawing process by those skilled in the art and will not be described in detail here.

[0029] To achieve the function of relative rotation between the clamping assembly 4 and the lead screw nut 3 in the circumferential direction while maintaining axial upper limit engagement, a connection method that allows axial fixation but circumferential freedom can be adopted. For example, one end of the lead screw nut 3 can be set as a splined shaft, or the lead screw nut 3 itself can be set as a sleeve with internal splines. Correspondingly, a connecting sleeve 411 is provided on the slide 41 of the clamping assembly 4. The connecting sleeve 411 and the slide 41 can be fixedly connected by bolts. The connecting sleeve 411 is fitted onto the lead screw nut 3 and has a matching spline hole, or an external spline is provided to match the internal spline on the lead screw nut 3. Since the spline setting allows circumferential sliding, the lead screw nut 3 can rotate freely relative to the connecting sleeve 411 of the clamping assembly 4. At the same time, the connecting sleeve 411 and the slide 41 of the clamping assembly 4 can move axially on the lead screw. The spline can be a ball spline.

[0030] like Figure 4 As shown, the first drive assembly 5 may include a first servo motor 51, a first reducer 52, and a coupling 53. The first servo motor 51 generates rotational motion, providing power for the rotation of the lead screw 2. The first drive assembly 5 can be fixed to the base plate 1 via the first mounting seat 10. The first reducer 52 can be mounted on the output shaft of the first servo motor 51, reducing the output speed of the first servo motor 51 while increasing the output torque. The coupling 53 can transmit the reduced rotational motion from the first reducer 52 to the lead screw 2, and can also serve as a connection and provide some compensation, such as compensating for shaft misalignment caused by manufacturing or installation errors.

[0031] like Figure 5As shown, the second drive assembly 6 may include a second servo motor 61 and a second reducer 62. The second servo motor 61 is used to generate rotational motion, providing power for the rotation of the lead screw nut 3. The second drive assembly 6 can be fixed to the slide 41 via the second mounting base 11. The second reducer 62 can be mounted on the output shaft of the second servo motor 61, which can reduce the output speed of the second servo motor 61 while increasing the output torque. The second servo motor 61 is connected to the lead screw nut 3 via the second reducer 62.

[0032] The rotation directions of the first drive assembly 5 and the second drive assembly 6 can be the same or opposite. For example, when the rotation directions of the first drive assembly 5 and the second drive assembly 6 are the same, they each apply a rotational force in the same direction to the lead screw 2 and the lead screw nut 3; when the rotation directions of the first drive assembly 5 and the second drive assembly 6 are opposite, they each apply a rotational force in opposite directions to the lead screw 2 and the lead screw nut 3.

[0033] The rod feeding device of this application controls the rotation of the lead screw 2 by setting a first drive component 5 and controls the rotation of the lead screw nut 3 by setting a second drive component 6. The first drive component 5 and the second drive component 6, with different rotational speeds, can be activated at different times to switch between slow and high speeds. For example, at slow speeds, only the second drive component 6 is activated, and at high speeds, only the first drive component 5 is activated. Alternatively, the first drive component 5 and the second drive component 6 can be activated simultaneously. The switching between slow and high speeds is achieved by the difference in rotational speed and direction of the drive ends of the first drive component 5 and the second drive component 6. This rod feeding device provides two speed control methods: time-sharing activation and coordinated drive. It does not require additional mechanical structures such as clutches and gearboxes. High and low speeds can be achieved by activating the first drive component 5 or the second drive component 6 individually, or by synchronously coordinating the two drives, utilizing the difference in rotational speed and direction to achieve a wide range and high precision speed adjustment. This device solves the technical problems of traditional rod feeding devices, such as limited speed range, instability at low speeds, and complex structure with large space requirements.

[0034] like Figures 1-3 As shown, in some embodiments, the bar feeding device further includes: a synchronization component 7, one end of which is connected to the drive end of the second drive component 6, and the other end is connected to the lead screw nut 3.

[0035] In one possible scenario, the synchronization component 7 synchronously and without slippage transmits the rotational motion output by the second drive component 6 to the lead screw nut 3, avoiding control misalignment due to transmission slippage, delay, or phase shift. The synchronization component 7 may include a gear transmission mechanism, comprising a driving gear and a driven gear. The driving gear may be mounted on the drive end of the second drive component 6, and the driven gear may be sleeved on the lead screw 2 and connected to the lead screw nut 3, rotating coaxially with the lead screw nut 3. This synchronization component 7 achieves power transmission through gear meshing. Alternatively, the synchronization component 7 may include a first synchronous pulley 71, a second synchronous pulley 72, and a synchronous belt 73. The first synchronous pulley 71 may be mounted on the drive end of the second drive component 6, i.e., on the rotating shaft output by the second servo motor 61 through the second reducer 62. The first synchronous pulley 71 acts as the driving pulley, rotating under the drive of the motor, serving as the power input end. The second synchronous pulley 72 can be sleeved on the lead screw 2, or on the axial extension of the lead screw nut 3. The second synchronous pulley 72, as the driven pulley, is not directly fixed to the lead screw 2, but rotates synchronously only with the lead screw nut 3. The synchronous belt 73 can be sleeved on the outer circumference of the first synchronous pulley 71 and the second synchronous pulley 72. Through the meshing of the belt teeth with the pulleys, it synchronously transmits the rotational motion of the first synchronous pulley 71 to the second synchronous pulley 72, thereby driving the lead screw nut 3 to rotate. This synchronous assembly 7, through the meshing transmission structure of the first synchronous pulley 71, the synchronous belt 73, and the second synchronous pulley 72, achieves high-precision, slip-free, and low-noise power transmission from the second drive assembly 6 to the lead screw nut 3, effectively isolating the influence of rotational torque on the preform 9 and improving the stability of the entire feeding device.

[0036] In some embodiments, the reduction ratio of the first reducer 52 is 1:3; and the reduction ratio of the second reducer 62 is 1:100.

[0037] In one possible scenario, the reduction ratio refers to the ratio of the input shaft speed to the output shaft speed of the reducer. Specifically: for the first reducer 52, the output shaft rotates only once for every three revolutions of the input shaft, reducing the output speed to one-third of the input speed while simultaneously amplifying the output torque to three times the input speed; for the second reducer 62, the output shaft rotates only once for every 100 revolutions of the input shaft, resulting in a significant speed reduction. The first reducer 52 uses a 1:3 reduction ratio to improve the system's high-speed response capability and meet the requirements of rapid stroke. The second reducer 62 uses a 1:100 reduction ratio to achieve stable output with ultra-low speed, high torque, and high precision, ensuring the smoothness and reliability of the "snail-speed" rod feeding, effectively solving the technical challenge of balancing speed range, low-speed stability, and dynamic response in traditional single-drive systems.

[0038] like Figure 1 As shown, in some embodiments, the first drive component 5 and the second drive component 6 are located on the same side of the clamping component 4.

[0039] In one possible scenario, the first drive assembly 5 and the second drive assembly 6 can be mounted on the same side of the clamping assembly 4. To allow sufficient operating space, the first drive assembly 5 can be positioned at the top of the base plate 1, and the second drive assembly 6 can also be positioned on the side of the clamping assembly 4 near the top of the base plate 1. The first drive assembly 5 and the second drive assembly 6 are stacked in the thickness direction of the base plate 1. Both drive assemblies are arranged on the same side of the clamping assembly 4, rather than being located at both ends of the lead screw 2 or on both sides of the clamping assembly 4 respectively. This "centralized arrangement on the same side" allows for a high degree of concentration of the power source and control unit, facilitating wiring, installation, and debugging.

[0040] like Figures 1-3 As shown, in some embodiments, the bar feeding device further includes a sliding part 12 disposed on the base plate 1; the clamping assembly 4 includes a slide block 41 connected to the lead screw nut 3; and a slider 8, through which the slide block 41 is slidably connected to the sliding part 12.

[0041] In one possible scenario, the sliding part 12 is fixedly mounted on the base plate 1, serving as a fixed portion of the guide structure. It can be in the form of a guide rail, a groove, etc., restricting the axial movement of the clamping assembly 4 along the lead screw 2. One end of the slider 8 engages with the sliding part 12, such as by embedding it in a guide rail groove, while the other end connects to the slide block 41. The slide block 41 is the main support structure for the clamping assembly 4. Its first surface is used to mount the two-dimensional fine-tuning mechanism 42 and the gripper mechanism 43, and its second surface, opposite to the first surface, is used to connect the lead screw nut 3. A portion of its second surface can be slidably connected to the sliding part 12 via the slider 8. When the second drive assembly 6 drives the lead screw nut 3 to rotate, or the first drive assembly 5 drives the lead screw 2 to rotate, a relative rotational motion occurs between the lead screw 2 and the lead screw nut 3, which is then converted into axial movement of the lead screw nut 3. Because the slide block 41 is rigidly connected to the lead screw nut 3, the slide block 41 moves axially accordingly. At this time, the slider 8 slides synchronously on the sliding part 12, providing precise guidance for the stroke of the slide block 41.

[0042] like Figures 1-3 As shown, in some embodiments, there are multiple sliding portions 12, and at least one sliding portion 12 is provided on each of the opposite sides of the slide block 41.

[0043] In one possible scenario, two or more sets of sliding parts 12 are symmetrically arranged on the base plate 1 along the axis of the lead screw 2, located on opposite sides of the slide block 41, such as the left and right sides. Each set of sliding parts 12 includes a guide rail or guide rod and its matching slider 8. Structurally, the slide block 41 can span between multiple sliding parts 12, with its left and right sides or both ends forming a sliding engagement with the corresponding sliding parts 12 via sliders 8. For example, two parallel linear guide rails are installed on the left and right sides of the base plate 1, respectively. The left side of the slide block 41 is connected to the left guide rail via one slider 8 or two sliders 8, and the right side is connected to the right guide rail via one slider 8 or two sliders 8. The lead screw nut 3 is located in the middle of the slide block 41 and is fixedly connected to it to ensure that the driving force acts on the center line. When sliding parts 12 are provided on both sides of the slide block 41, the entire clamping assembly 4 is "clamped" between the two parallel guide rails, forming a stable structure with double-sided support and central drive. It effectively suppresses swaying, tilting or twisting caused by off-center loading or vibration, ensuring straightness and stability during the bar feeding process.

[0044] In some embodiments, the rod feeding device further includes a control component, which is communicatively connected to the first drive component 5 and the second drive component 6; the reduction ratio of the second drive component 6 is greater than the reduction ratio of the first drive component 5; when the rod feeding device is in a slow-speed state, the control component controls the second drive component 6 to start, the first drive component 5 is not started, and the moving speed of the preform 9 is the rotational speed of the drive end of the second drive component 6; when the rod feeding device is in a high-speed state, the control component controls the first drive component 5 to start, the second drive component 6 is not started, and the moving speed of the preform 9 is the rotational speed of the drive end of the first drive component 5.

[0045] In one possible scenario, the control component may include a programmable logic controller (PLC), a motion controller, etc., equipped with a communication interface to interact with the first servo motor 51 and the second servo motor 61. The control component outputs control commands to adjust the start, stop, speed, and direction of the first servo motor 51 and the second servo motor 61, and can receive encoder feedback to achieve closed-loop control.

[0046] In this embodiment, the reduction ratio of the second drive component 6 is greater than the reduction ratio of the first drive component 5. The reduction ratio of the first drive component 5 is the same as the reduction ratio of the first reducer 52. The reduction ratio of the second drive component 6 is the sum of the reduction ratios of the second reducer 62 and the synchronization component 7. In this embodiment, the diameter of the optical fiber preform 9 can be 60mm, the slow speed range can be 1-100mm / min, and the high speed can be no less than 10000mm / min. The diameter of the lead screw 2 can be 40mm, the lead screw 2 can be 10mm, the rated speed of the first servo motor 51 can be 3000r / min, the reduction ratio of the first reducer 52 can be 1:3, the rated speed of the second servo motor 61 can be 3000r / min, the reduction ratio of the second reducer 62 can be 1:100, the reduction ratio of the synchronization component 7 can be 1:2, and the total reduction ratio is 1:200.

[0047] When operating at a slow speed, the first servo motor 51 does not start, and the lead screw 2 remains stationary; the second servo motor 61 starts running, and the lead screw nut 3 rotates. In order to achieve a slow speed range of 1-100 mm / min, the speed adjustment range of the second servo motor 61 can be 20-2000 r / min, which is within the stable working range of the servo motor. In engineering practice, the stable working range of the servo motor speed is generally 5%-100% of the rated speed, which is easier to achieve. In this embodiment, it is 15-3000 r / min.

[0048] At high speed, the second servo motor 61 is not started; the first servo motor 51 starts running, and the lead screw 2 rotates. In order to achieve a high speed of 10000 mm / min, the speed of the first servo motor 51 is adjusted to 3000 r / min, which is within the stable working range of the servo motor.

[0049] In some embodiments, the rod feeding device further includes a control component, which is communicatively connected to the first drive component 5 and the second drive component 6; the reduction ratio of the second drive component 6 is equal to the reduction ratio of the first drive component 5; when the rod feeding device is in a slow-speed state, the control component controls the first drive component 5 and the second drive component 6 to start simultaneously, the first drive component 5 and the second drive component 6 rotate in opposite directions, and the moving speed of the preform 9 is the superposition of the rotation speeds of the drive ends of the first drive component 5 and the second drive component 6; when the rod feeding device is in a high-speed state, the control component controls the first drive component 5 and the second drive component 6 to start simultaneously, the first drive component 5 and the second drive component 6 rotate in the same direction, and the moving speed of the preform 9 is the superposition of the rotation speeds of the drive ends of the first drive component 5 and the second drive component 6.

[0050] In this embodiment, the reduction ratio of the second drive component 6 is equal to the reduction ratio of the first drive component 5. The reduction ratio of the first drive component 5 is the same as the reduction ratio of the first reducer 52. The reduction ratio of the second drive component 6 is the sum of the reduction ratios of the second reducer 62 and the synchronization component 7. In this embodiment, the diameter of the optical fiber preform 9 can be 100mm, the slow speed range can be 1-100mm / min, and the high speed can be no less than 10000mm / min. The diameter of the lead screw 2 can be 40mm, the lead screw 2 can be 20mm, the rated speed of the first servo motor 51 can be 3000r / min, the reduction ratio of the first reducer 52 can be 1:10, the rated speed of the second servo motor 61 can be 3000r / min, the reduction ratio of the second reducer 62 can be 1:10, the reduction ratio of the synchronization component 7 can be 1:1, and the total reduction ratio is 1:10.

[0051] At a slow speed, the first servo motor 51 and the second servo motor 61 start simultaneously and run in opposite directions. At a forward slow speed, the first servo motor 51 is adjusted to a forward speed of 500 r / min, and the second servo motor 61 is adjusted to a negative speed of 499.5 to 450 r / min; at a negative slow speed, the first servo motor 51 is adjusted to a forward speed of 500 r / min, and the second servo motor 61 is adjusted to a negative speed of 500.5 to 550 r / min.

[0052] At high speed, the first servo motor 51 and the second servo motor 61 start simultaneously and run in the same direction. During forward high speed, both the first servo motor 51 and the second servo motor 61 are set to a forward speed of 2500 r / min. During reverse high speed, both the first servo motor 51 and the second servo motor 61 are set to a reverse speed of 2500 r / min.

[0053] This rod feeding device coordinates the cooperative operation of the first drive component 5 and the second drive component 6 through a control component, achieving wide-range speed regulation in two modes:

[0054] Slow-speed mode: The first drive component 5 and the second drive component 6 run in opposite directions, using a tiny relative speed difference to achieve an extremely low feed rate of 1 to 100 mm / min. This extremely low output speed difference, such as 0.05 to 5 rpm, is mapped to a tiny speed difference in the high-speed range of the servo motor, such as 0.5 to 50 rpm, ensuring that the motor always operates within a stable range and avoiding the "creeping" phenomenon.

[0055] High-speed mode: The first drive component 5 and the second drive component 6 operate in the same direction, with their relative speeds superimposed to increase the axial speed. A high-speed stroke of 10,000 mm / min can be achieved at a motor speed of 2500 rpm, resulting in rapid response and high efficiency.

[0056] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0057] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0058] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0059] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A rod feeding device, characterized in that, include: Base plate; A lead screw, which is rotatably mounted on the base plate; A lead screw nut, wherein the lead screw nut is sleeved on the lead screw and is threaded into the lead screw; A clamping assembly, which is connected to the lead screw nut and is used to clamp the preform; A first drive assembly and a second drive assembly, wherein the first drive assembly is used to drive the lead screw to rotate, and the second drive assembly is used to drive the lead screw nut to rotate. In the circumferential direction of the lead screw nut, the clamping assembly is rotatable relative to the lead screw nut, and in the axial direction of the lead screw nut, the clamping assembly is in a limiting engagement with the lead screw nut. The rotation direction of the first driving component is the same as or opposite to that of the second driving component.

2. The rod feeding device according to claim 1, characterized in that, Also includes: A synchronization component, one end of which is connected to the drive end of the second drive component, and the other end of which is connected to the lead screw nut.

3. The rod feeding device according to claim 2, characterized in that, The synchronization component includes: The first synchronous belt pulley is connected to the drive end of the second drive component; The second synchronous pulley is sleeved on the lead screw and connected to the lead screw nut; A timing belt is fitted around the outer periphery of the first timing pulley and the second timing pulley.

4. The rod feeding device according to claim 1, characterized in that, The first driving component includes: The system comprises a first servo motor, a first reducer, and a coupling, wherein the first servo motor is connected to the coupling via the first reducer, and the coupling is fixedly connected to the lead screw. The second driving component includes: The second servo motor is connected to the lead screw nut via the second reducer.

5. The rod feeding device according to claim 4, characterized in that, The reduction ratio of the first reducer is 1:3; The reduction ratio of the second reducer is 1:

100.

6. The rod feeding device according to claim 1, characterized in that, The first drive component and the second drive component are located on the same side of the clamping component.

7. The rod feeding device according to claim 1, characterized in that, A sliding part is provided on the base plate; The clamping assembly includes a slide block connected to the lead screw nut; The slider is slidably connected to the sliding part via the slider.

8. The rod feeding device according to claim 7, characterized in that, The number of sliding parts is multiple, and at least one sliding part is provided on each of the opposite sides of the slide block.

9. The rod feeding device according to claim 1, characterized in that, Also includes: A control component, which is communicatively connected to the first drive component and the second drive component; The reduction ratio of the second drive component is greater than the reduction ratio of the first drive component; When the rod feeding device is in a slow speed state, the control component controls the second drive component to start, the first drive component does not start, and the moving speed of the preform rod is the rotation speed of the drive end of the second drive component. When the rod feeding device is in high-speed mode, the control component controls the first drive component to start, while the second drive component does not start, and the moving speed of the preform rod is the rotation speed of the drive end of the first drive component.

10. The rod feeding device according to claim 1, characterized in that, Also includes: A control component, which is communicatively connected to the first drive component and the second drive component; The reduction ratio of the second drive component is equal to the reduction ratio of the first drive component; When the rod feeding device is in a slow speed state, the control component controls the first drive component and the second drive component to start simultaneously. The first drive component and the second drive component rotate in opposite directions, and the moving speed of the preform rod is the sum of the rotation speeds of the drive ends of the first drive component and the second drive component. When the rod feeding device is in a high-speed state, the control component controls the first driving component and the second driving component to start simultaneously. The first driving component and the second driving component rotate in the same direction, and the moving speed of the preform rod is the sum of the rotation speeds of the driving ends of the first driving component and the second driving component.

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