A wrapping machine with tension monitoring function

Abstract

The application provides a wrapping machine with tension monitoring function, comprising a tension detection module, a wrapping module and a traction module, the tension detection module comprising a magnetic field unit and a detection unit; the magnetic field unit comprising a first magnetic pole and a second magnetic pole; the detection unit comprising a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module and an inversion module. The application realizes non-contact real-time monitoring of tension in the wrapping process, solving the technical problem that high-speed rotating coated materials are difficult to directly detect tension.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to the field of cable manufacturing. BACKGROUND

[0002] Medical cables play a vital role in medical equipment, connecting various components of the equipment, ensuring accurate data transmission and stable power supply. Medical cables have a wide range of applications, including high-end imaging equipment such as CT scanners, MRI machines, endoscopes, etc.

[0003] In particular, the cable of the endoscope has higher requirements, greater manufacturing difficulty, and the following characteristics: good flexibility, good electrical conductivity, strong anti-interference ability, and clear image signal transmission. The above characteristics require more precise control of tension during cable manufacturing. In the cable manufacturing process, the tension control accuracy of the wrapping process directly affects the mechanical strength and electrical performance of the cable. Tension fluctuations can also increase cable loss and affect signal transmission quality.

[0004] However, in the field of cable manufacturing, the conductor core is often coated with multiple materials to meet different requirements. In the existing wrapping process, the coating material is in high-speed rotation, making it difficult to directly detect the tension of the coating material or the measurement results are inaccurate. SUMMARY

[0005] The present application provides a wrapping machine with a tension detection module that can continuously monitor the tension of the coating material during the wrapping process.

[0006] The present application provides a wrapping machine with a tension monitoring function, comprising a tension detection module, a wrapping module and a traction module;

[0007] The tension detection module comprises a magnetic field unit and a detection unit;

[0008] The magnetic field unit comprises a first magnetic pole and a second magnetic pole; the first magnetic pole and the second magnetic pole are oppositely arranged and generate a magnetic field; the first magnetic pole is N pole; the second magnetic pole is S pole;

[0009] The detection unit comprises a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module and an inversion module; the first pair of transmission rollers and the second pair of transmission rollers are arranged at a distance L apart for transmitting the conductor core; the induced voltage detection module is electrically connected to the first pair of transmission rollers and the second pair of transmission rollers respectively, for acquiring the induced voltage generated by the conductor core cutting the magnetic field during the wrapping process, and acquiring the vibration frequency of the conductor core;

[0010] The inversion module is used for inverting the tension of the coating material according to the vibration frequency of the conductor core;

[0011] The wrapping module, taking the conductor core as a rotating shaft, is used for wrapping the conductor core with the wrapping material;

[0012] The traction module is used for providing a pulling force F0 to the conductor core, so that the conductor core travels at a preset speed.

[0013] The conductor core is arranged in a magnetic field generated by the first magnetic pole and the second magnetic pole.

[0014] Further, the inversion module according to the vibration frequency of the conductor core to invert the tension of the wrapping material includes the following steps:

[0015] Step a, obtaining the pulling force F0 of the traction module;

[0016] Step b, calculating the actual pulling force F1 on the conductor core

[0017] (1);

[0018] Wherein, f is the vibration frequency of the conductor core in the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant;

[0019] Step c, calculating the horizontal component T of the tension T according to formula (2) H :

[0020] (2);

[0021] Step d, inverting the tension according to formula (3):

[0022] (3);

[0023] Wherein, is the included angle between the wrapping material and the conductor core, 0° <90°.

[0024] Further, the constant K is calculated by formula (4):

[0025] (4)

[0026] Wherein, μ is the linear density of the conductor core.

[0027] Further, the diameter of the conductor core is 0.1-1mm.

[0028] Further, the material of the first pair of transmission rollers and the second pair of transmission rollers is conductive material.

[0029] Further, the material of the conductor core is copper.

[0030] Further, the magnetic field unit is located between the first pair of transmission rollers and the second pair of transmission rollers.

[0031] Further, the first magnetic pole is a permanent magnet; and the second magnetic pole is a permanent magnet.

[0032] Further, the traction module is arranged downstream of the wrapping module; and the wrapping module is arranged between the first pair of transmission rollers and the second pair of transmission rollers.

[0033] Compared with the prior art, the application has the following advantages:

[0034] The application utilizes the induced voltage generated by the conductor core vibration cutting magnetic field to obtain the horizontal component of the tension by combining the string vibration theory, thereby inverting the tension of the wrapping material, and the structure is simple and reliable, realizes the non-contact real-time monitoring of the tension in the wrapping process, and solves the technical problem that the tension of the high-speed rotating wrapping material is difficult to be directly detected. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0036] Figure 1 The figure is a structure schematic diagram of the wrapping machine of the present embodiment;

[0037] Figure 2 The figure is a force schematic diagram of the conductor core 10 in the wrapping process;

[0038] Figure 3 The figure is a force schematic diagram of the conductor core 10 in the wrapping process; Figure 1 The figure is a cross-sectional schematic diagram along the A direction. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] Figure 1The wrapping machine structure diagram of this embodiment is shown in FIG. The wrapping machine includes a tension detection module, a wrapping module (not shown in the figure), and a traction module 90. The wrapping module drives the wrapping material 20 to rotate with the conductor core as the rotation axis, thereby wrapping the wrapping material 20 on the surface of the conductor core 10. The traction module 90 is used to provide a pulling force F0 to the conductor core 10, so that the conductor core 10 moves at a preset speed ( Figure 1 In this embodiment, the traction module 90 is arranged downstream of the wrapping module; the wrapping module is arranged between the first pair of transmission rollers 50 and the second pair of transmission rollers 60. Figure 1 As shown, the tension detection module includes a magnetic field unit and a detection unit.

[0041] The magnetic field unit includes a first magnetic pole 30 and a second magnetic pole 40. The first magnetic pole 30 and the second magnetic pole 40 are arranged opposite each other and located between a first pair of transport rollers 50 and a second pair of transport rollers 60, forming a magnetic field region. The magnetic field direction is perpendicular to the travel direction of the conductor core 10 (in this embodiment, the travel direction is horizontal, while the magnetic field direction is vertical). Preferably, the first magnetic pole 30 is an N pole; the second magnetic pole 40 is an S pole. A portion of the conductor core 10 to be coated is arranged within the magnetic field region generated by the first magnetic pole 30 and the second magnetic pole 40, and the axis of the conductor core 10 is perpendicular to the magnetic field.

[0042] Preferably, the first magnetic pole 30 and the second magnetic pole 40 are both permanent magnets.

[0043] The detection unit includes a first pair of transmission rollers 50, a second pair of transmission rollers 60, an induced voltage detection module 70 and an inversion module 80; the first pair of transmission rollers 50 and the second pair of transmission rollers 60 are arranged at a distance L from each other for transmitting the conductor core.

[0044] Preferably, the first pair of transmission rollers 50 and the second pair of transmission rollers 60 may be made of conductive material to serve as pins of the induction voltage detection module 70 .

[0045] The induced voltage detection module 70 is electrically connected to the first pair of transmission rollers 50 and the second pair of transmission rollers 60 respectively, and is used to obtain the induced voltage generated by the conductor core 10 cutting the magnetic field during the wrapping process and extract the vibration frequency of the conductor core.

[0046] an inversion module 80 for inverting the tension of the coating material 20 according to the vibration frequency of the conductor core 10;

[0047] The traction module 90 is disposed downstream of the wrapping module; the wrapping module is disposed between the first pair of transmission rollers 50 and the second pair of transmission rollers 60 .

[0048] Figure 2 FIG. 1 shows a schematic diagram of the force applied to the conductor core 10 during the wrapping process. Figure 2As shown, the covering material 20 applies a tension T to the conductor core, and the tension T can be decomposed into a horizontal component T along the horizontal direction. H and the vertical component T along the vertical direction V , and the following relations are satisfied:

[0049]

[0050] During the wrapping process, the vertical component T V The conductor core 10 will be driven to perform minute periodic vibrations, that is, the conductor core 10 will perform chordal vibration motion around the horizontal direction with the first pair of transmission rollers 50 and the second pair of transmission rollers 60 as fulcrums respectively. Figure 3 Shown Figure 1 The cross-sectional view along the A direction. Figure 3 As shown, the conductor core 10 performs annular, periodic motion in the magnetic field region ( Figure 3 As the conductor core 10 vibrates, the magnetic field is periodically cut, thereby generating a periodic induced voltage. That is, the frequency of the induced voltage is the same as the vibration frequency of the conductor core 10. The inversion module 80 of this embodiment extracts the frequency of the induced voltage from the induced voltage signal obtained by the induced voltage detection module 70 as the vibration frequency f of the conductor core 10.

[0051] In this embodiment, the induced voltage detection module 70 is a high-sensitivity voltmeter. Specifically, the two ends of the high-sensitivity voltmeter are connected to the first pair of transmission rollers 50 and the second pair of transmission rollers 60, respectively, to measure the induced voltage generated by the conductor core 10 cutting through the magnetic field. Preferably, the first pair of transmission rollers 50 and the second pair of transmission rollers 60 are made of a conductive metal material.

[0052] Since the force point of the conductor core 10 is close to the second pair of transmission rollers 60, in order to facilitate subsequent calculations, this embodiment regards the conductor core between the first pair of transmission rollers 50 and the second pair of transmission rollers 60 as a chord with uniform mass distribution, thereby ignoring the impact of the uneven mass caused by the coating material 20.

[0053] According to string vibration theory, the actual force F1 exerted on the conductor core 10 in the horizontal direction during the winding process can be calculated by formula (1):

[0054] (1);

[0055] Wherein, f is the vibration frequency of the conductor core during the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; and K is a constant.

[0056] See again Figure 2 In the horizontal direction, the conductor core 10 is not only subjected to the horizontal component T of the tension T of the coating material 20, but also to the horizontal component T of the tension T of the coating material 20. Vis also subjected to the pulling force F0 of the pulling module 90, and thus, the horizontal component T H The tension T can be calculated by formula (2):

[0057] (2)

[0058] Preferably, the pulling force F0 of the pulling module 90 is a set value or an output value determined by a prior method.

[0059] In combination with Figure 2 , the horizontal component T H The tension T can be calculated by formula (2):

[0060] (3)

[0061] Preferably, the constant K can be calculated by formula (4):

[0062] (4)

[0063] Wherein, μ is the linear density of the conductor core.

[0064] In summary, the process of the inversion module 80 inverting the tension T includes the following steps:

[0065] Step a, obtaining the pulling force F0 of the pulling module;

[0066] Step b, calculating the actual pulling force F1 on the conductor core

[0067] (1);

[0068] Wherein, f is the vibration frequency of the conductor core during the winding process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant;

[0069] Step c, calculating the horizontal component T H of the tension T according to formula (2):

[0070] (2);

[0071] Step d, inverting the tension according to formula (3):

[0072] (3);

[0073] Wherein, is the included angle between the coating material and the conductor core, 0° <90°.

[0074] Preferably, the diameter of the conductor core 10 is 0.1-1mm.

[0075] Preferably, the material of the conductor core 10 is copper.

[0076] As used herein, the terms "about" and "substantially" are understood to mean that the value is within ±30% of the stated value. Two line segments or lines are "parallel" if the angle between them is less than or equal to 45 degrees. Two line segments or lines are "perpendicular" if the angle between them is in the range of 【60, 120】 degrees. Phase is "out of phase" if the angle between them is in the range of

-180, 180

[0077] The various embodiments described in this specification are presented as examples of the application. Each embodiment is presented highlighting different aspects of the application, and the same or similar features of different embodiments are cross-referenced to one another.

[0078] The above description of disclosed embodiments provides examples, and is not intended to be limiting. Numerous modifications of the embodiments, as defined by the general principles of the application, can be implemented by one of ordinary skill in the art. The scope of protection is limited by the words of the claims and their equivalents. What is claimed is:

Claims

1. A wrapping machine with a tension monitoring function, characterized by, The tension detection module, the wrapping module and the traction module are included. The tension detection module includes a magnetic field unit and a detection unit. The magnetic field unit includes a first magnetic pole and a second magnetic pole; the first magnetic pole and the second magnetic pole are oppositely arranged and generate a magnetic field; the first magnetic pole is N pole; the second magnetic pole is S pole. The detection unit includes a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module and an inversion module; the first pair of transmission rollers and the second pair of transmission rollers are arranged at a distance L apart for transmitting the conductor core; the induced voltage detection module is electrically connected with the first pair of transmission rollers and the second pair of transmission rollers respectively for acquiring the induced voltage generated by the conductor core cutting the magnetic field in the wrapping process and acquiring the vibration frequency of the conductor core. The inversion module is used for inverting the tension of the wrapping material according to the vibration frequency of the conductor core. The wrapping module is used for wrapping the wrapping material on the surface of the conductor core with the conductor core as the rotating shaft. The traction module is used for providing a pulling force F0 to the conductor core so that the conductor core travels at a preset speed. The conductor core is arranged in the magnetic field generated by the first magnetic pole and the second magnetic pole. The inversion of the tension of the wrapping material according to the vibration frequency of the conductor core in the inversion module includes the following steps: Step a, acquiring the pulling force F0 of the traction module; Step b, calculating the actual pulling force F1 on the conductor core （1）； Wherein, f is the vibration frequency of the conductor core in the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant; Step c. Calculate the horizontal component T of the tension T according to equation (2) H : （2）； Step d, inverting the tension according to formula (3): （3）； wherein, is the angle between the cladding material and the conductor core, 0° < 90°; The constant K is calculated by formula (4): （4） Wherein, μ is the linear density of the conductor core.

2. The wrapping machine with tension monitoring function according to claim 1, wherein The diameter of the conductor core is 0.1-1mm.

3. The wrapping machine with tension monitoring function according to claim 1, wherein The material of the first pair of transmission rollers and the second pair of transmission rollers is conductive material.

4. The wrapping machine with tension monitoring function according to claim 1, wherein The material of the conductor core is copper.

5. The wrapping machine with tension monitoring function according to claim 1, wherein The magnetic field unit is located between the first pair of transmission rollers and the second pair of transmission rollers.

6. The wrapping machine with tension monitoring function according to claim 1, wherein The first magnetic pole is a permanent magnet; the second magnetic pole is a permanent magnet.

7. The wrapping machine with tension monitoring function according to claim 1, wherein The traction module is arranged downstream of the wrapping module; the wrapping module is arranged between the first pair of transmission rollers and the second pair of transmission rollers.

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