A control method for a large-tow raw yarn stacking machine and a bundle combining machine

Abstract

The present invention provides a control method for a large-tow raw yarn stacking machine and a bundler. The stacking machine includes a conveyor line, a swing bucket device, a lifting device, and a pressure plate assembly. The bundler includes a two-roller drive mechanism, a redundant structure, a two-roller drive mechanism, and a redundant structure. The yarn bundle passes from the bundler through the two-roller drive mechanism, the redundant roller, and the yarn delivery roller to the yarn guide wheel above the stacker's lifting mechanism. The yarn bundle then passes through the feed roller above the swing bucket and enters the swing bucket mechanism, which swings left and right to stack the raw yarn. The present invention solves the problem of overtightened yarn bundles breaking and overly loose yarn entanglement caused by the lifting mechanism's height compensation for the swing bucket during the stacking process, thereby improving the continuity of the yarn bundle stacking and packaging process.

Description

Technical Field

[0001] The present invention relates to the field of raw silk stacking and packaging, and in particular to a control method for a raw silk stacking machine and a bundle combining machine to cooperate with the raw silk stacking and packaging. Background Art

[0002] Carbon fiber is a fibrous carbon material, and its chemical composition is composed of carbon elements that account for more than 90% of the total mass. Carbon fiber and its composite materials have a series of excellent properties, such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, extrusion resistance, electrical conductivity, heat transfer, and low thermal expansion coefficient. They can be used as both structural materials to carry loads and as functional materials. Therefore, carbon fiber and its composite materials have developed rapidly in recent years.

[0003] Precursor yarn is the precursor of carbon fiber. After oxidation and carbonization, the carbon fiber is produced on the carbonization line. With the existing spindle method, the precursor's head is wound inside the spindle, preventing the ends of the precursor from connecting during the carbonization line connection. Furthermore, due to the high linear density of large-tow carbon fiber (above 40k), the precursor yarn wound on the spindle is short, resulting in frequent downtime for spindle replacement, which affects the continuous industrial production of the carbonization line.

[0004] Stacking boxes are an effective solution for replacing spindles, achieving end-to-end docking of raw yarns, eliminating the spindle replacement process, and improving carbon fiber production efficiency. When stacking large tows of raw yarn into the box, due to the small yarn width, high swing frequency, and fast yarn release speed, there is a risk of tow flipping and excessive tow tension leading to yarn breakage during the stacking process, affecting the tow stacking quality and the continuous stacking process. Summary of the Invention

[0005] The purpose of the present invention is to design a control method for a large-tow raw yarn stacking machine and a bundle combining machine to solve the problems existing in the stacking process, improve the stacking quality of the yarn bundles and the continuous stacking process.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A control method for a large-tow raw yarn stacking machine and a bundle combining machine is provided, the method being characterized by:

[0008] The wire stacking machine includes a conveyor line: including a loading line, a stacking line, and a loading line. The stacking line is driven by a servo motor to transport the cartons; a swing bucket device: controlled by a servo motor to swing left and right to stack the raw wire; a lifting device: the lifting component is guided by linear guides on both sides, and the servo motor drives the roller chain transmission. During the stacking process, the height difference of the swing bucket is continuously adjusted in conjunction with the swing of the swing bucket; the pressing plate assembly: guided by linear guides on both sides, and the servo motor drives the gear transmission. The pressing plate assembly moves synchronously with the carton during the compaction process.

[0009] The bundle combining machine includes a two-roller drive mechanism: composed of a metal roller and a rubber roller, which is synchronized with the drive roller that transports the final bundle of the spinning line, and the tension between them can be adjusted; the redundant structure includes a wire guide roller and a redundant roller. The wire guide roller rotates fixedly, and the redundant roller itself rotates passively. The redundant roller is controlled by a servo motor to move left and right on the slide rail.

[0010] The tow passes through the two-roller drive mechanism, redundant rollers, and wire-out rollers from the bundle combining machine to the tow guide wheel above the lifting mechanism of the stacking machine, and enters the swing bucket mechanism through the feeding roller above the swing bucket. The swing bucket mechanism swings left and right to stack the raw silk.

[0011] The control method of the large-tow raw yarn stacking machine and the bundle combining machine includes:

[0012] The initial signal input is the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism.

[0013] Preferably, the stacking machine controller and the beam coupling machine controller collect the output speed signal of the precursor production line through the spinning end speed sensor, and respectively control the wire feeding speed of the stacking machine feed roller and the beam coupling machine's two-roller drive mechanism to be consistent with the output speed of the precursor production line. The wire feeding speed of the stacking machine feed roller and the beam coupling machine's two-roller drive mechanism varies synchronously with the output speed of the precursor production line.

[0014] Preferably, considering the inertia caused by the fast speed of the raw yarn, a margin △a is reserved at the edge of the box, and the raw yarn speed S is used. F According to the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism, the angular velocity ω of the swing bucket controlled by the wire stacking machine controller is:

[0015]

[0016] The margin △a retained at the edge of the box is adjusted according to the on-site tow stacking situation.

[0017] Preferably, symmetrical limit sensors are set in the swing mechanism, and the wire stacking machine controller collects the swing bucket swing position signal to realize the reversing control of the swing bucket control motor. The control system automatically calculates the angle θ between the swing bucket swing angle limit and the vertical direction, which is used to guide the installation position of the limit sensor:

[0018]

[0019] Preferably, the wire stacking machine controller controls the servo motor of the lifting device to drive the lifting assembly up and down, and cooperates with the swing of the swing bucket during the wire stacking process to control the arc motion of the end of the swing bucket to be close to linear motion. The controller controls the servo motor of the swing bucket device to drive the lifting assembly to move according to the limit sensor signal and the angular velocity information of the swing bucket in the swing bucket mechanism. With the sensing moment of the limit sensor as the time reference of time 0, the speed V1 of the lifting assembly is controlled to be:

[0020] v1=-ωrsin(ωt-θ)

[0021] The positive and negative values ​​of the velocity indicate compensation for the upward and downward movement of the lifting assembly.

[0022] Preferably, each time a layer of tow is stacked, the stacking machine controller controls the servo motor of the lifting device to drive the lifting assembly to rise to a height of the wire surface.

[0023] Preferably, the controller of the wire stacking machine controls the pressing plate assembly to press down once each time a layer of wire bundle is stacked, and moves synchronously with the carton during the pressing process.

[0024] Preferably, during the stacking process, the wire stacking machine controller controls the wire stacking line servo motor to drive the box to move, and the movement speed is controlled according to the set wire stacking path.

[0025] Preferably, the beam coupling machine controller controls the redundant rollers of the redundant structure to move in opposite directions with the stacking machine lifting assembly. The opposite movement here refers to the movement of loosening the tow between the two roller drive mechanism of the beam coupling machine and the feed roller of the stacking machine. If the stacking machine lifting mechanism moves downward to compensate, the tow becomes tighter, and the redundant rollers of the redundant structure move in the direction of loosening the tow. The beam coupling machine controller controls the redundant rollers of the redundant structure to move synchronously with the stacking machine lifting assembly, and controls the redundant roller servo motor to drive the redundant roller speed V2 to be:

[0026]

[0027] In general, the present invention has the following advantages:

[0028] The present invention designs a control method for a large-tow raw yarn stacking machine and a bundle combining machine. It also designs a coordinated control method between the stacking machine's swing mechanism and lifting mechanism, controlling the tail of the swing bucket to move in a near-linear manner, maintaining a relatively close distance between the tail of the swing bucket and the stacked yarns in the box. This solves the problem of the swing mechanism swinging left and right to stack the yarns, and the tail of the swing bucket moving in an arc. When the swing bucket swings left and right to stack the yarns, the tail of the swing bucket moves further away from the stacked yarn surface in the box. This, coupled with the high speed of the yarns, can cause the yarns to deviate, flip, and twist during their descent. The yarns can now be stacked flatly.

[0029] The present invention designs a control method for a large-tow raw yarn stacking machine and a bundle coupling machine, and designs a coordinated control method between the stacking machine lifting mechanism and the bundle coupling machine redundant mechanism, so as to solve the problems of the bundle being too tight and broken and the bundle being too loose and entangled caused by the lifting mechanism performing height compensation for the swing bucket during the stacking process, thereby improving the continuity of the bundle stacking and packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the wire stacking machine

[0031] Figure 2 Schematic diagram of the beam coupling machine

[0032] Figure 3 Layout diagram of the beam-bundling machine and wire stacking machine

[0033] Figure 4 This is a data interaction diagram of the control method of a large-tow raw yarn stacking machine and a bundle combining machine of the present invention

[0034] Explanation of the accompanying drawings: conveyor line body 1, swing bucket device 2, lifting device 3, pressure plate assembly 4, two-roller drive mechanism 5: composed of a rubber roller 5-1 and a metal roller 5-2, redundant structure 6: including redundant roller 6-1 and wire guide roller 6-2, wire guide device 7.

[0035] Specific implementation measures

[0036] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[0037] like Figure 1 The wire stacking machine shown includes a conveying line 1: including a loading line, a stacking line, and a lowering line. The stacking line is driven by a servo motor to transport the cartons; a swing bucket device 2: controlled by a servo motor to swing left and right to stack the raw wire; a lifting device 3: the lifting component is guided by linear guides on both sides, and the servo motor drives the roller chain transmission. During the wire stacking process, the height difference of the swing bucket is continuously adjusted in conjunction with the swing of the swing bucket; a pressing plate assembly 4: the pressing plate assembly is guided by linear guides on both sides, and the servo motor drives the gear transmission. It moves synchronously with the carton during the compaction process.

[0038] The bundle combining machine includes a two-roller drive mechanism 5: composed of a rubber roller 5-1 and a metal roller 5-2, which are synchronized with the drive roller of the spinning line for conveying the final bundle, and the tension between them can be adjusted; a redundant structure 6: including a redundant roller 6-1 and a wire outlet guide roller 6-2, the wire outlet guide roller rotates fixedly, and the redundant roller itself rotates passively. The redundant roller is controlled by a servo motor to move left and right on the slide rail.

[0039] The tow passes through the two-roller drive mechanism 5, the redundant roller 6-1, and the wire outlet roller 6-2 from the bundle combining machine to the tow guide wheel 7 above the lifting mechanism of the stacking machine, and enters the swing bucket mechanism 2-1 through the feeding roller 2-2 above the swing bucket. The swing bucket mechanism swings left and right to stack the raw silk.

[0040] The control method of the large-tow raw yarn stacking machine and the bundle combining machine includes:

[0041] The initial signal input is the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism.

[0042] Specifically, the stacking machine controller and the beam-binding machine controller collect the output speed signal of the precursor production line through the spinning end speed sensor, and respectively control the wire feeding speed of the stacking machine feed roller 2-2 and the beam-binding machine two-roller drive mechanism 5 to align with the output speed of the precursor production line. The wire feeding speed of the stacking machine feed roller and the beam-binding machine two-roller drive mechanism changes synchronously with the output speed of the precursor production line.

[0043] Specifically, considering the inertia caused by the fast speed of the raw yarn, a margin △a is reserved at the edge of the box. F According to the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism, the angular velocity ω of the swing bucket controlled by the wire stacking machine controller is:

[0044]

[0045] The margin △a retained at the edge of the box is adjusted according to the on-site tow stacking situation.

[0046] Specifically, symmetrical limit sensors are installed in the swing mechanism. The wire stacking machine controller collects the swing bucket swing position signal to realize the reversing control of the swing bucket control motor. The control system automatically calculates the angle θ between the swing bucket swing angle limit and the vertical direction, which is used to guide the installation position of the limit sensor:

[0047]

[0048] Specifically, the wire stacking machine controller controls the servo motor of the lifting device to drive the lifting assembly up and down. During the wire stacking process, the swing bucket swings to control the arc motion at the end of the swing bucket to nearly linear motion. The controller controls the servo motor of the swing bucket device to drive the lifting assembly according to the limit sensor signal and the angular velocity information of the swing bucket in the swing bucket mechanism. With the time when the limit sensor senses as time 0, the speed V1 of the lifting assembly is controlled as follows:

[0049] v1=-ωrsin(ωt-θ)

[0050] The positive and negative values ​​of the velocity indicate compensation for the upward and downward movement of the lifting assembly.

[0051] Specifically, each time a layer of tow is stacked, the stacking machine controller controls the servo motor of the lifting device to drive the lifting assembly to rise to a certain height of the wire surface.

[0052] Specifically, the controller of the wire stacking machine controls the pressing plate assembly to press down once each time a layer of wire bundle is stacked, and moves synchronously with the carton during the pressing process.

[0053] Specifically, during the stacking process, the stacking machine controller controls the stacking wire servo motor to drive the box to move, and the movement speed is controlled according to the set stacking path. The stacking machine controller collects the position sensor signal on the stacking wire to realize the box movement direction conversion control.

[0054] Specifically, the beam machine controller controls the redundant rollers of the redundant structure and the stacking machine lifting assembly to move in opposite directions. This opposite movement refers to the movement of loosening the tow between the beam machine's two-roller drive mechanism and the stacking machine's feed roller. If the stacking machine's lifting mechanism moves downward to compensate, tightening the tow, the redundant rollers of the redundant structure move in the direction of loosening the tow. The beam machine controller controls the redundant rollers of the redundant structure and the stacking machine lifting assembly to move synchronously, controlling the redundant roller servo motor to drive the redundant roller at a speed V2 of:

[0055]

[0056] It can be seen that the control method of the large-tow raw yarn stacking machine and the bundle coupling machine designs a coordinated control method between the stacking machine's swing mechanism and the lifting mechanism, controls the tail of the swing bucket to make nearly linear motion, and maintains a close distance between the tail of the swing bucket and the box body for stacking the bundles. It solves the problems of position deviation, flipping, and twisting of the bundles during the falling process when the swing mechanism swings left and right to stack the bundles. The bundles can be stacked flat. This control method designs a coordinated control method between the stacking machine's lifting mechanism and the bundle coupling machine's redundant mechanism, solves the problems of the bundles being too tight and broken and too loose and entangled due to the lifting mechanism's height compensation for the swing bucket during the stacking process, and improves the continuity of the bundle stacking and boxing.

[0057] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in the field, there will be changes in the specific implementation methods based on the ideas provided by the present invention, and these changes should also be considered within the scope of protection of the present invention.

Claims

1. A control method for a large-tow raw yarn stacking machine and a bundle combining machine, characterized by: The wire stacking machine includes: a conveying line body, which includes an upper line body, a wire stacking line body, and a lower line body. The wire stacking line body is driven by a servo motor to transport the box body; Swing bucket device: controlled by servo motor to swing left and right to stack the raw silk; Lifting device: The lifting assembly is guided by linear guide rails on both sides, and the servo motor drives the roller chain transmission. During the wire stacking process, the height difference of the swing bucket is continuously corrected in coordination with the swing bucket; Pressing plate assembly: The pressing plate assembly is guided by linear guide rails on both sides, and the servo motor drives the gear transmission, and moves synchronously with the carton during the pressing process; The bundler includes a two-roller drive mechanism: consisting of a metal roller and a rubber roller, which are synchronized with the drive roller that transports the tow at the end of the spinning line and realize adjustable tension between them; Redundant structure: including the wire guide roller and the redundant roller. The wire guide roller rotates fixedly, and the redundant roller rotates passively. The redundant roller is controlled by the servo motor to move left and right on the slide rail. The tow passes through the two-roller drive mechanism, redundant rollers, and the wire-out roller from the bundle combining machine, and reaches the tow guide wheel above the lifting mechanism of the stacking machine. It then passes through the feeding roller above the swing bucket and enters the swing bucket mechanism. The swing bucket mechanism swings left and right to stack the raw yarn. The initial signal input is the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism; The controllers of the stacking machine and the coupling machine collect the output speed signal of the precursor production line through the spinning end speed sensor, and respectively control the wire feeding speed of the stacking machine feeding roller and the coupling machine two-roller drive mechanism to be consistent with the output speed of the precursor production line. The wire feeding speed of the stacking machine feeding roller and the coupling machine two-roller drive mechanism changes synchronously with the output speed of the precursor production line. Keep a margin △a at the edge of the box, according to the original silk output speed S F According to the internal width a of the box and the rotation radius r of the swing bucket of the swing mechanism, the angular velocity ω of the swing bucket controlled by the wire stacking machine controller is: The margin △a at the edge of the box is adjusted according to the on-site tow stacking situation; Symmetrical limit sensors are set in the swing mechanism. The wire stacking machine controller collects the swing bucket swing position signal to realize the reversing control of the swing bucket control motor. The control system automatically calculates the swing bucket swing angle limit and the vertical angle θ used to guide the installation position of the limit sensor: The wire stacking machine controller controls the servo motor of the lifting device to drive the lifting component to move up and down, and cooperates with the swing bucket to swing during the wire stacking process to control the arc motion of the end of the swing bucket into a nearly linear motion.

2. The control method for the large-tow raw yarn stacking machine and the bundle combining machine according to claim 1, characterized in that: The controller controls the servo motor of the swing bucket device to drive the lifting component to move according to the limit sensor signal and the swing bucket angular velocity information in the swing bucket mechanism. The limit sensor sensing moment is taken as the time reference of time 0, and the lifting component speed V1 is controlled as follows: v1=-ωrsin(ωt-θ) The positive and negative values ​​of the velocity indicate compensation for the upward and downward movement of the lifting assembly.

3. The control method for the large-tow raw yarn stacking machine and the bundle combining machine according to claim 1, characterized in that: Each time a layer of tow is stacked, the stacking machine controller controls the servo motor of the lifting device to drive the lifting component to rise to a certain height of the wire surface.

4. The control method for the large-tow raw yarn stacking machine and the bundle combining machine according to claim 3, characterized in that: The controller of the wire stacking machine controls the pressing plate assembly to press down once every time a layer of wire tow is stacked, and moves synchronously with the carton during the pressing process.

5. The control method for the large-tow raw yarn stacking machine and the bundle combining machine according to claim 4, characterized in that: During the stacking process, the wire stacking machine controller controls the wire stacking line servo motor to drive the box to move, and the movement speed is controlled according to the set wire stacking path.

6. The control method for the large-tow raw yarn stacking machine and the bundle combining machine according to claim 4, characterized in that: The controller of the bundled machine controls the redundant rollers of the redundant structure to move synchronously with the lifting assembly of the wire stacking machine, and controls the redundant roller servo motor to drive the redundant roller speed V2 to: The controller of the bundle machine controls the redundant rollers of the redundant structure and the lifting assembly of the wire stacking machine to perform opposite movements. The opposite movement here refers to the movement of loosening and tightening the wire bundle between the second roller drive mechanism of the bundle machine and the feeding roller of the wire stacking machine. If the lifting mechanism of the wire stacking machine moves downward to compensate, the wire bundle becomes tight, and the redundant rollers of the redundant structure move in the direction of loosening the wire bundle.

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