Spindle transfer device for cotton yarn spinning roving and spinning unit process

Abstract

The invention relates to the technical field of spindle transfer, in particular to a spindle transfer device for a cotton yarn spinning roving and spinning unit process, which comprises a track traveling mechanism, a lifting driving mechanism, a spindle clamping mechanism and a multi-dimensional data acquisition module for acquiring data, the transfer state monitoring module is used for determining whether the transfer stability of the spindles is qualified or not based on the first component and the second component of the swing amplitude in the transfer process of the spindles, and the supporting force monitoring module is used for adjusting the distance between the sliding block sets based on the pressure range of supporting pre-tightening force. The slippage monitoring module is used for determining whether the dynamic supporting force of the spindle is qualified or not based on the relative slippage rate of the spindle at the starting and stopping moments and optimizing the distance adjusting coefficient, and the deformation monitoring module is used for determining whether the transfer process of the spindle is qualified or not based on the radial deformation characterization parameters of the bobbin so as to correct the distance optimizing coefficient. According to the spindle transfer device, the adaptability of the spindle transfer device to transfer spindles of multiple specifications is improved.

Description

Technical Field

[0001] This invention relates to the field of spindle transfer technology, and in particular to a spindle transfer device for the coarse and fine yarn transfer process in cotton yarn spinning. Background Technology

[0002] In the roving and spinning processes of cotton yarn spinning, spindle transfer is a crucial link between the roving and spinning stages. Its transfer stability directly affects the yarn winding state, the quality of subsequent spinning processing, and production efficiency. Currently, most commonly used spindle transfer devices in the industry employ manual assistance or simple mechanical clamping structures. The clamping force of these devices is usually a fixed set value and cannot be dynamically adjusted according to parameters such as spindle quality and acceleration during the transfer process. In actual transfer, insufficient clamping force can lead to relative slippage of the spindle during start-stop, causing yarn loosening and breakage, or excessive clamping force can cause radial plastic deformation of the yarn tube, resulting in the loss of the yarn tube's reuse value. At the same time, traditional transfer devices generally lack the ability to accurately monitor the vertical and longitudinal sway amplitude of the spindle during transfer, making it difficult to distinguish whether the excessive sway is caused by force imbalance of the clamping mechanism or improper parameters of the walking drive mechanism. They can only adopt indiscriminate parameter adjustment methods, which not only result in low control efficiency but also easily aggravate yarn tube damage. They are unable to adapt to the continuous and automated production requirements of the roving and spinning processes, thus hindering the intelligent upgrading process of cotton yarn spinning production lines.

[0003] Chinese Patent Application Publication No. CN107503006A discloses an automatically expandable spindle transfer device, including a frame, two pairs of wheels, and a holding mechanism for holding spindles. The holding mechanism includes a side fixed limiting plate, a limit plate, a side movable limiting frame that is horizontally slidably mounted on the frame and located between the side fixed limiting plate and the limit plate, a horizontally retractable telescopic bag with an open upper end, a linear drive mechanism for driving the side movable limiting frame to move horizontally between the side fixed limiting plate and the limit plate, and a controller for controlling the operation of the linear drive mechanism. The holding space of the telescopic bag can be flexibly changed to meet the needs of large-volume spindle transfer.

[0004] The existing technology also has the following problems: the existing technology lacks the ability to dynamically adjust the actual transfer parameters for transfer scenarios of different specifications of yarn spindles, and it is difficult to balance the contradiction between the clamping force required for anti-slip and the bearing limit of the yarn tube's resistance to deformation. Ultimately, the yarn spindle transfer device has low adaptability to the transfer of multi-specification yarn spindles and cannot meet the diversified transfer needs of coarse and fine yarn transfer processes. Summary of the Invention

[0005] To address this, the present invention provides a spindle transfer device for the coarse and fine yarn spinning process in cotton yarn spinning, which overcomes the problem in the prior art that the transfer device lacks the ability to dynamically adjust the actual transfer parameters for transfer scenarios of spindles of different specifications, and is difficult to balance the contradiction between the clamping force required for anti-slip and the bearing limit of the yarn tube's resistance to deformation, resulting in low adaptability of the spindle transfer device to transfer spindles of multiple specifications.

[0006] To achieve the above objectives, the present invention provides a spindle transfer device for the roving and spinning process in cotton yarn spinning, comprising:

[0007] A lifting drive mechanism includes a fixed part and a telescopic part sleeved outside the fixed part and slidably connected to the fixed part;

[0008] A spindle clamping mechanism includes several support plates evenly distributed circumferentially for insertion into the yarn tube of the spindle to provide radial support force, several connecting rod assemblies fixedly connected to the support plates for driving the support plates to open and close, several slider groups hinged to both ends of the connecting rod assemblies, a second screw that is disposed through the slider groups and pulsatorically connected to the slider groups, and a second motor for driving the second screw to rotate.

[0009] A multi-dimensional data acquisition module includes a displacement sensor for acquiring the displacement of the yarn tube, an inclination sensor for acquiring the swing amplitude of the yarn spindle, and a pressure sensor array for acquiring the support preload between the yarn tube and the support plate.

[0010] The transfer status monitoring module is used to clamp the yarn spindle with a preset support preload based on the weight of the yarn spindle for transfer, and to determine whether the transfer stability of the yarn spindle is qualified based on the first component and the second component of the swing amplitude during the transfer process.

[0011] The support force monitoring module, in response to unsatisfactory transport stability, sets several distance adjustment coefficients based on the pressure difference of the support preload to adjust the spacing of the slider group;

[0012] The slip monitoring module is used to determine whether the dynamic support force of the spindle is qualified based on the relative slip rate of the spindle at the moment of start-stop, and to set several distance optimization coefficients based on the unqualified conditions to optimize the distance adjustment coefficient.

[0013] The deformation monitoring module is used to determine whether the yarn spindle transfer process is qualified based on the radial deformation characterization parameters of the yarn tube, so as to correct the distance optimization coefficient based on the unqualified conditions.

[0014] Furthermore, the transfer status monitoring module determines that the transfer stability of the spindle is unqualified based on the comparison result that the first component of the swing amplitude is greater than the first preset component, or the second component is greater than the second preset component.

[0015] Wherein, the first component represents the radial offset amplitude of the swing amplitude perpendicular to the track direction, and the second component represents the axial offset amplitude of the swing amplitude along the track direction.

[0016] Furthermore, when the second component is greater than the second preset component, the support force monitoring module sets several acceleration adjustment coefficients based on the relative difference between the second component and the second preset component to reduce the maximum start-stop acceleration of the track walking mechanism.

[0017] Furthermore, when the first component is greater than the first preset component, the support force monitoring module sets several distance adjustment coefficients based on the comparison result of the pressure range of the support preload and the preset range to reduce the spacing of the slider group.

[0018] Furthermore, the pressure difference is the difference between the maximum and minimum values ​​of the support preload between the circumferentially distributed support plate and the yarn tube.

[0019] Furthermore, the slip monitoring module determines that the dynamic support force of the spindle is unqualified based on the comparison result that the relative slip rate is greater than the preset slip rate.

[0020] Furthermore, when the dynamic support force of the yarn spindle is unqualified, the slip monitoring module sets several distance optimization coefficients based on the slip ratio difference between the relative slip ratio and the preset slip ratio, and the comparison result with the preset slip ratio difference, in order to optimize the distance adjustment coefficient.

[0021] Furthermore, the deformation monitoring module determines that the yarn spindle transfer process is unqualified based on the comparison result that the radial deformation characterization parameter is greater than the preset deformation characterization parameter.

[0022] Furthermore, the radial deformation characterization parameters are determined based on the actual diameter and nominal diameter of the yarn tube after being compressed by the support preload.

[0023] Furthermore, when the yarn spindle transfer process is unqualified, the deformation monitoring module sets several distance correction coefficients to correct the distance optimization coefficient based on the comparison results of the real-time support pretension force and the preset support pretension force relative difference with the preset pretension force.

[0024] Compared with existing technologies, the advantages of this invention lie in its ability to address different fault causes associated with different directional swings. It decomposes the swing amplitude of the spindle into a first component perpendicular to the track and a second component along the track. Traditional devices, failing to distinguish the swing direction, cannot determine whether the instability is caused by an imbalance in the clamping mechanism's preload or a malfunction in the travel drive mechanism, leading to indiscriminate parameter adjustments that exacerbate yarn tube damage. In contrast, this invention's directional monitoring design uses a two-dimensional tilt sensor to precisely pinpoint the fault source. An excess of the first component directly points to a problem with the clamping mechanism, while an excess of the second component is associated with a fault in the travel / lifting drive mechanism. For clamping problems, the slider group spacing is dynamically adjusted to enhance the supporting preload; for drive problems, the start-stop acceleration is optimized. This avoids resource waste from ineffective adjustments and fundamentally improves transport stability, providing a proactive guarantee for the quality stability of subsequent yarn processing.

[0025] Furthermore, this invention addresses the significant differences in clamping requirements for different specifications of yarn spindles and the inherent contradiction between anti-slip and anti-deformation. On one hand, it pre-sets the pre-tightening force based on the yarn spindle mass calculation, fundamentally adapting to multiple specifications of yarn spindles. On the other hand, it uses a slip monitoring module to compensate for the deviation between the actual friction coefficient and the theoretical value, and a deformation monitoring module to correct for excessive pre-tightening force. This ensures that the clamping force is always within a safe range between the lower limit of anti-slip requirements and the upper limit of yarn tube deformation resistance, thereby improving the adaptability to multiple specifications of yarn spindles and reducing losses such as yarn tube scrap and yarn breakage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the spindle transfer device for the roving and spinning process in cotton yarn spinning according to an embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of a spindle transfer device used in the roving and spinning process of cotton yarn spinning according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the spindle clamping mechanism according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the yarn spindle clamping mechanism in the clamping state according to an embodiment of the present invention;

[0030] Figure 5 This is a structural block diagram of a spindle transfer device for the roving and spinning process in cotton yarn spinning according to an embodiment of the present invention;

[0031] In the diagram: 1. Track walking mechanism, 11. Pulley, 12. Track; 2. Lifting drive mechanism, 21. First screw, 22. First motor, 23. Fixed part, 24. Telescopic part; 3. Bearing plate; 4. Spindle clamping mechanism, 41. Petal body, 42. Liner block, 43. Slider group, 44. Second screw, 45. Limiting block, 46. Second motor, 47. Linkage assembly; 5. Displacement sensor; 6. Pressure sensor array; 7. Tilt sensor. Detailed Implementation

[0032] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0033] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0035] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Please see Figures 1-5 As shown, Figure 1 This is a schematic diagram of the overall structure of the spindle transfer device for the roving and spinning process in cotton yarn spinning according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a spindle transfer device used in the roving and spinning process of cotton yarn spinning according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the spindle clamping mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the yarn spindle clamping mechanism in the clamping state according to an embodiment of the present invention; Figure 5 This is a structural block diagram of a spindle transfer device used in the coarse and fine yarn spinning process of cotton yarn according to an embodiment of the present invention.

[0037] This invention provides a spindle transfer device for the roving and spinning process in cotton yarn spinning, comprising:

[0038] The track-walking mechanism 1 includes a track 12 and a pulley 11;

[0039] The lifting drive mechanism 2 includes a fixed part 23, a telescopic part 24 sleeved outside the fixed part and slidably connected to the fixed part 23, a first screw 21 disposed inside the telescopic part 24, and a first motor 22 for driving the first screw 21 to rotate.

[0040] The support plate 3 is used to connect the lifting drive mechanism 2 and the spindle clamping mechanism 4;

[0041] The spindle clamping mechanism 4 includes several support plates evenly distributed circumferentially for insertion into the yarn tube of the spindle to provide radial support force, several connecting rod assemblies 47 fixedly connected to each of the support plates for driving the opening and closing of the support plates, several slider groups 43 hinged to both ends of the connecting rod assemblies 47, a second screw 44 passing through the slider groups 43 and pulsatorically connected to the slider groups 43, and a second motor 46 disposed in the cavity of the bearing plate 3 for driving the second screw 44 to rotate. The support plates are of a segmented structure, including a segment 41 and a liner 42.

[0042] The multidimensional data acquisition module includes a displacement sensor 5 disposed on the lower end face of the bearing plate 3 for acquiring the displacement of the yarn tube, an inclination sensor 7 for acquiring the swing amplitude of the yarn spindle, and a pressure sensor array 6 for acquiring the support preload between the yarn tube and the support plate.

[0043] The transfer status monitoring module is used to clamp the yarn spindle with a preset support preload based on the weight of the yarn spindle for transfer, and to determine whether the transfer stability of the yarn spindle is qualified based on the first component and the second component of the swing amplitude during the transfer process.

[0044] The support force monitoring module, in response to unqualified transport stability, sets several distance adjustment coefficients based on the pressure difference of the support preload to adjust the spacing of the slider group 43;

[0045] The slip monitoring module is used to determine whether the dynamic support force of the spindle is qualified based on the relative slip rate of the spindle at the moment of start-stop, and to set several distance optimization coefficients based on the unqualified conditions to optimize the distance adjustment coefficient.

[0046] The deformation monitoring module is used to determine whether the yarn spindle transfer process is qualified based on the radial deformation characterization parameters of the yarn tube, so as to correct the distance optimization coefficient based on the unqualified conditions.

[0047] In this embodiment of the invention, the spindle clamping mechanism 4 has four support plates, which are evenly distributed circumferentially. Along the height direction of each support plate, three connecting rod assemblies 47 are fixedly connected from top to bottom. Each connecting rod assembly 47 corresponds to a slider group 43. The end of each connecting rod assembly 47 away from the support plate is hinged to the corresponding slider group 43, forming a transmittable connecting rod-slider mechanism. For each slider group 43, the corresponding section of the screw of the driving mechanism is machined with external threads of opposite directions. A single slider group 43 contains two symmetrically arranged sliders, which respectively engage with the opposite threads of the corresponding section of the screw. When the motor drives the screw to rotate around its own axis, since the two sliders of each slider group 43 have threads of opposite directions to the screw, under the action of thread transmission, the two sliders will move in opposite directions relative to each other along the axial direction of the screw. The reverse movement of the sliders is transmitted to each support plate through the connecting rod assembly 47, driving the four support plates to open or close radially simultaneously, thereby achieving stable clamping or releasing of the spindle. However, the above values ​​are not limited to these, and those skilled in the art can also choose values ​​according to actual needs.

[0048] Specifically, the valve body 41 is a rigid support material, which can be reinforced polyamide or aluminum alloy, and the liner 42 is an elastomer material, which can be polyurethane, without any specific limitation.

[0049] Specifically, the pressure sensor array 6 is embedded in the surface of the valve body 41 that is in direct contact with the yarn tube, and a pressure sensor is set at the position of each link assembly 47 that is in direct contact with the liner 42, corresponding to the position of the valve body 41.

[0050] Specifically, the tilt sensor 7 is a two-dimensional tilt sensor 7, which is disposed on the lower end face of the support plate 3, and the specific model is not limited. The displacement sensor 5 is a miniature laser triangulation displacement sensor 5, which is uniformly embedded in the lower end face of the support plate 3 in the circumferential direction, and the specific model is not limited.

[0051] Specifically, the transfer status monitoring module calculates the preset support preload based on the weight of the yarn spindle using a formula, as shown below:

[0052]

[0053] Where F represents the preset support preload, m represents the spindle mass, a represents the maximum acceleration during the operation of the transfer device, μ represents the static friction coefficient of the contact surface between the yarn tube and the support plate, and k represents the distribution coefficient, k=0.8.

[0054] Specifically, the transfer status monitoring module determines that the transfer stability of the spindle is qualified based on the comparison result that the first component of the swing amplitude is less than or equal to the first preset component and the second component is less than or equal to the second preset component.

[0055] The transfer status monitoring module determines that the transfer stability of the yarn spindle is unqualified based on the comparison result that the first component of the swing amplitude is greater than the first preset component, or the second component is greater than the second preset component.

[0056] Specifically, the value range of the first preset component is set to [5mm, 8mm], and 6mm is preferred in this embodiment of the invention. The value range of the second preset component is set to [7mm, 13mm], and 10mm is preferred in this embodiment of the invention.

[0057] Specifically, the first component represents the radial offset amplitude of the swing amplitude perpendicular to the direction of track 12. Its magnitude directly reflects the intensity of the lateral swaying of the spindle caused by uneven force on the clamping mechanism. This component is calculated from the Y-axis measurement data of the two-dimensional tilt sensor 7. The second component represents the axial offset amplitude of the swing amplitude along the direction of the track. Its magnitude directly reflects the intensity of the forward and backward movement of the spindle caused by excessive acceleration during the start and stop of the track traveling mechanism 1 and uneven clearance between the pulley 11 and the track 12. This component is calculated from the X-axis measurement data of the two-dimensional tilt sensor 7.

[0058] Specifically, the fluctuations of the two components correspond to operational defects in different systems of the device. After separation, the causes of instability can be directly identified. The first component exceeding the standard directly points to factors in the clamping mechanism, such as uneven opening of the support plates, imbalance of radial support preload, and deviation of linkage slider synchronization, which are unrelated to the track travel mechanism 1. The second component exceeding the standard directly points to faults in the travel / lifting drive mechanism 2, such as uneven track wear, differences in pulley resistance, excessive acceleration during start-stop, and unstable lifting power output, which are unrelated to the clamping mechanism. If the components are not separated and only the composite value of the swing amplitude is monitored, the source of the fault cannot be distinguished, and only indiscriminate parameter adjustments can be made. This not only fails to solve the fundamental problem but may also cause yarn tube deformation due to excessive clamping.

[0059] Specifically, when the second component is greater than the second preset second component, the support force monitoring module sets several acceleration adjustment coefficients based on the relative difference between the second component and the second preset component to reduce the maximum start-stop acceleration of the track walking mechanism 1.

[0060] Specifically, the support force monitoring module determines to reduce the maximum start-stop acceleration by a first acceleration adjustment coefficient based on the comparison result that the relative difference of the components is greater than the preset relative difference of the components.

[0061] The support force monitoring module determines to reduce the maximum start-stop acceleration by a second acceleration adjustment coefficient based on the comparison result that the relative difference of the components is less than or equal to the preset relative difference of the components.

[0062] Specifically, the relative difference of the preset components refers to the percentage of the difference between the second component and the second preset component. The range of the relative difference of the preset components is set to [5%, 15%], and preferably 10% in this embodiment of the invention. The range of the first acceleration adjustment coefficient is set to [0.8, 0.85], and preferably 0.82 in this embodiment of the invention. The range of the second acceleration adjustment coefficient is set to [0.86, 0.94], and preferably 0.9 in this embodiment of the invention.

[0063] Specifically, the support force monitoring module determines the pressure range of the support preload when the first component is greater than the first preset component, and reduces the spacing of the slider group 43 by a first distance adjustment coefficient based on the comparison result that the pressure range is greater than or equal to the preset range.

[0064] The support force monitoring module reduces the spacing of the slider group 43 by a second distance adjustment coefficient based on the comparison result that the pressure difference is less than the preset range.

[0065] Specifically, the pressure difference refers to the difference between the maximum and minimum support preload between the circumferentially distributed support plate and the yarn tube within 10 seconds after the moment when the transfer stability is deemed unqualified due to excessive swaying in the direction perpendicular to track 12.

[0066] Specifically, the preset range is set to [50N, 100N], and in this embodiment of the invention, it is 80N. The range of the first distance adjustment coefficient is set to [0.93, 0.95], and in this embodiment of the invention, it is preferably 0.94. The range of the second distance adjustment coefficient is set to [0.96, 0.98], and in this embodiment of the invention, it is preferably 0.97.

[0067] Specifically, the spacing of the slider group 43 is negatively correlated with the radial extension of the support plate. When the spacing of the slider group 43 decreases, the two sliders in the same slider group 43 will move closer together. Through the change in the included angle of the connecting rod, the circumferentially distributed support plates will be pushed to extend radially outward synchronously. The increase in the radial extension of the support plates will generate a greater squeezing force on the yarn tube, directly increasing the support preload between each support plate and the yarn tube. The essence of the first component exceeding the standard is the imbalance of the circumferential preload of the clamping mechanism. The yarn spindle is subjected to lateral inertial force, causing the center of gravity to shift, which in turn causes vertical swaying. Increasing the support preload can increase the static friction force, counteract the lateral inertial force. After the support preload force increases, the normal pressure on the contact surface between the yarn tube and the support plate increases synchronously, and the static friction force increases accordingly. This can effectively counteract the lateral inertial force generated when the yarn spindle swings, prevent the relative slippage between the yarn tube and the support plate, and fundamentally suppress the further expansion of the swing amplitude.

[0068] Specifically, the slip monitoring module determines that the dynamic support force of the spindle is unqualified based on the comparison result that the relative slip rate is greater than the preset slip rate;

[0069] The slippage monitoring module determines that the dynamic support force of the spindle is qualified based on the comparison result that the relative slippage rate is less than or equal to the preset slippage rate.

[0070] Specifically, the relative slip ratio refers to the percentage of the axial relative displacement of the yarn tube relative to the support plate at the moment the yarn spindle transfer device starts and stops, compared to the effective axial clamping length of the yarn tube.

[0071] Specifically, the preset slip ratio is set to a range of [3%, 8%], and preferably 5% in this embodiment of the invention.

[0072] Specifically, the core of dynamic support force is the static friction force converted from the preload, which counteracts the inertial force generated during the spindle's movement and prevents relative slippage. When the transfer device operates at a constant speed, the inertial force of the spindle approaches zero; at this point, even if the dynamic support force is insufficient, slippage may not occur. However, during start-up and shutdown, the device's acceleration reaches its maximum value, and the inertial force generated by the spindle simultaneously reaches its peak. This is the most severe load that the dynamic support force must overcome. If the relative slippage rate does not exceed the standard at the moment of start-up and shutdown, it indicates that the static friction force is sufficient to counteract the maximum inertial force, and slippage will not occur during subsequent constant-speed transfer. Conversely, if excessive slippage occurs at the moment of start-up and shutdown, it proves that the dynamic support force is insufficient, and the preload parameters need further optimization. The relative slippage at the moment of start-up and shutdown is not an instantaneous fluctuation, but a permanent local displacement between the yarn tube and the support plate. The cumulative slippage from repeated start-ups and shutdowns will increase the axial positioning deviation of the yarn tube and may even cause the spindle to fall out of the clamping mechanism. Therefore, the dynamic support force needs to be determined by the slippage rate at the moment of start-up and shutdown to avoid such irreversible quality defects at the source.

[0073] Specifically, even if the formula for calculating the preload of the preload has taken into account the maximum acceleration parameter, the spindle may still slip at the moment of start-up and stop. The parameter in the formula is the ideal static friction coefficient calibrated in the laboratory. However, in the actual transfer process, the contact surface condition will cause the static friction coefficient to drop significantly. Therefore, the preload of the preload calculated based on the formula will be insufficient to meet the dynamic friction requirements at the moment of start-up and stop.

[0074] Specifically, when the dynamic support force of the yarn spindle is unqualified, the slip monitoring module sets several distance optimization coefficients based on the slip ratio difference between the relative slip ratio and the preset slip ratio, and the comparison result with the preset slip ratio difference, in order to optimize the distance adjustment coefficient.

[0075] Specifically, the slip monitoring module determines to reduce the distance adjustment coefficient by a first distance optimization coefficient based on a comparison result that the slip rate difference is greater than or equal to the preset slip rate difference.

[0076] The slip monitoring module determines to reduce the distance adjustment coefficient by using a second distance optimization coefficient based on the comparison result that the slip rate difference is less than the preset slip rate difference.

[0077] Specifically, the preset slip ratio difference is set to a range of [1%, 3%], with 2% being preferred in this embodiment of the invention. The first distance optimization coefficient is set to 0.92, and the second distance optimization coefficient is set to 0.95, but the above values ​​are not limited to these, and those skilled in the art can also choose values ​​according to actual needs.

[0078] Specifically, the deformation monitoring module determines that the yarn spindle transfer process is unqualified based on the comparison result that the radial deformation characterization parameter is greater than the preset deformation characterization parameter;

[0079] The deformation monitoring module determines that the yarn spindle transfer process is qualified based on the comparison result that the radial deformation characterization parameter is less than or equal to the preset deformation characterization parameter.

[0080] Specifically, the radial deformation characterization parameter refers to the percentage of the difference between the actual diameter and the nominal diameter of the yarn tube after being squeezed by the support preload, which is determined by the detection results of the micro laser triangular displacement sensor 5.

[0081] Specifically, the preset deformation characterization parameter is set to a value range of [2.5%, 4%], and preferably 3% in this embodiment of the invention.

[0082] Specifically, the radial deformation of yarn tubes has a clear boundary between elastic and plastic deformation. When the diameter change rate is ≤3%, most yarn tube materials are in the elastic deformation range, and the yarn tube can return to its original shape after the preload is removed, making it reusable. When the diameter change rate is >4%, paper tubes will experience local collapse, and plastic tubes will experience permanent elliptical deformation. The yarn tube completely loses its reuse value and must be scrapped directly. Plastic deformation of the yarn tube will directly disrupt the winding arrangement of the yarn on the yarn tube. If the yarn tube becomes elliptical or locally concave, the wound yarn will become locally loose and misaligned. In subsequent textile processes, unwinding will easily cause yarn breakage and knots, significantly reducing production efficiency.

[0083] Specifically, when the yarn spindle transfer process is unqualified, the deformation monitoring module sets several distance correction coefficients to correct the distance optimization coefficient based on the comparison results of the real-time support pretension force and the relative difference between the pretension force and the preset support pretension force.

[0084] Specifically, the preload difference refers to the percentage of the difference between the support preload and the preset support preload to the preset support preload.

[0085] Specifically, the deformation monitoring module increases the distance optimization coefficient with a first distance correction coefficient based on the comparison result that the relative difference of the preload force is greater than or equal to the preset relative difference of the preload force.

[0086] The deformation monitoring module increases the distance optimization coefficient with a second distance correction coefficient based on the comparison result that the relative difference of the preload force is greater than or equal to the preset relative difference of the preload force.

[0087] Specifically, the preset range of relative difference in preload is set to [15%, 30%], and 20% is preferred in this embodiment of the invention. The first distance correction coefficient is 1.04 and the second distance correction coefficient is 1.02, but the above values ​​are not limited to these, and those skilled in the art can also choose values ​​according to actual needs.

[0088] Specifically, different batches of yarn bobbins have different static friction coefficients and compressive strengths. If only a fixed distance adjustment coefficient is used, some yarn bobbins may slip or deform. By dynamically correcting the distance optimization coefficient, the preload requirements of yarn bobbins of different materials can be adapted based on real-time slip / deformation data. The essence of optimizing the distance of slider group 43 is to control the support preload, which is the core of ensuring stable transport. It must counteract the inertial force at the moment of start and stop, and must not exceed the compressive strength limit of the yarn bobbin. It is necessary to continuously optimize the distance to keep the preload within this dynamic equilibrium range.

[0089] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A spindle transfer device for the roving and spinning process in cotton yarn spinning, characterized in that, include: A lifting drive mechanism includes a fixed part and a telescopic part sleeved outside the fixed part and slidably connected to the fixed part; A spindle clamping mechanism includes several support plates evenly distributed circumferentially for insertion into the yarn tube of the spindle to provide radial support force, several connecting rod assemblies fixedly connected to the support plates for driving the support plates to open and close, several slider groups hinged to both ends of the connecting rod assemblies, a second screw that is disposed through the slider groups and pulsatorically connected to the slider groups, and a second motor for driving the second screw to rotate. A multi-dimensional data acquisition module includes a displacement sensor for acquiring the displacement of the yarn tube, an inclination sensor for acquiring the swing amplitude of the yarn spindle, and a pressure sensor array for acquiring the support preload between the yarn tube and the support plate. The transfer status monitoring module is used to clamp the yarn spindle with a preset support preload based on the weight of the yarn spindle for transfer, and to determine whether the transfer stability of the yarn spindle is qualified based on the first component and the second component of the swing amplitude during the transfer process. The support force monitoring module, in response to unsatisfactory transport stability, sets several distance adjustment coefficients based on the pressure difference of the support preload to adjust the spacing of the slider group; The slip monitoring module is used to determine whether the dynamic support force of the spindle is qualified based on the relative slip rate of the spindle at the moment of start-stop, and to set several distance optimization coefficients based on the unqualified conditions to optimize the distance adjustment coefficient. The deformation monitoring module is used to determine whether the yarn spindle transfer process is qualified based on the radial deformation characterization parameters of the yarn tube, so as to correct the distance optimization coefficient based on the unqualified conditions.

2. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 1, characterized in that, The transfer status monitoring module determines that the transfer stability of the yarn spindle is unqualified based on the comparison result that the first component of the swing amplitude is greater than the first preset component, or the second component is greater than the second preset component. Wherein, the first component represents the radial offset amplitude of the swing amplitude perpendicular to the track direction, and the second component represents the axial offset amplitude of the swing amplitude along the track direction.

3. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 2, characterized in that, When the second component is greater than the second preset second component, the support force monitoring module sets several acceleration adjustment coefficients based on the relative difference between the second component and the second preset component to reduce the maximum start-stop acceleration of the track walking mechanism.

4. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 2, characterized in that, When the first component is greater than the first preset component, the support force monitoring module sets several distance adjustment coefficients based on the comparison result of the pressure range of the support preload and the preset range to reduce the spacing of the slider group.

5. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 4, characterized in that, The pressure difference is the difference between the maximum and minimum values ​​of the support preload between the circumferentially distributed support plate and the yarn tube.

6. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 5, characterized in that, The slip monitoring module determines that the dynamic support force of the spindle is unqualified based on the comparison result that the relative slip rate is greater than the preset slip rate.

7. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 6, characterized in that, When the dynamic support force of the yarn spindle is unqualified, the slip monitoring module sets several distance optimization coefficients based on the slip ratio difference between the relative slip ratio and the preset slip ratio, and the comparison result with the preset slip ratio difference, in order to optimize the distance adjustment coefficient.

8. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 7, characterized in that, The deformation monitoring module determines that the yarn spindle transfer process is unqualified based on the comparison result that the radial deformation characterization parameter is greater than the preset deformation characterization parameter.

9. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 8, characterized in that, The radial deformation characterization parameters are determined based on the actual diameter and nominal diameter of the yarn tube after it is compressed by the support preload.

10. The spindle transfer device for the roving and spinning process in cotton yarn spinning according to claim 9, characterized in that, Under the condition that the yarn spindle transfer process is unqualified, the deformation monitoring module sets several distance correction coefficients to correct the distance optimization coefficient based on the comparison results of the real-time support pretension force and the preset support pretension force relative difference with the preset pretension force.

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