A method for regulating a driving device of a cigarette maker

Abstract

This invention relates to a method for controlling the suction belt, cloth belt, and transmission device of a cigarette rolling machine, comprising the following steps: acquiring the linear speed of the suction belt and the linear speed of the cloth belt in real time; determining the percentage by which the cloth belt's linear speed lags behind the suction belt's linear speed based on the acquired suction belt and cloth belt linear speeds; when the obtained percentage exceeds a set adjustment range, issuing a signal to replace the cloth belt or transmission device; when the obtained percentage does not exceed the set adjustment range, adjusting the rotational speed of the cloth belt pulley servo motor in the cloth belt transmission device according to the obtained percentage to ensure that the linear speed of the suction belt and the cloth belt are consistent. This invention achieves automatic control and improves product quality.

Description

Technical Field

[0001] This invention relates to the field of tobacco equipment technology, specifically to a method for controlling the suction belt, cloth belt, and transmission device of a cigarette machine. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] In cigarette production, the suction belt drive roller drives the suction belt to adhere to the tobacco and transport it to the cigarette forming system. During normal production, the drive roller, under servo drive control, keeps the suction belt drive roller synchronized with the main equipment. However, during production, especially with the tensioning device, the suction belt may loosen. Furthermore, according to the friction formula F = uFn, over prolonged operation, the surfaces of the drive roller and the suction belt become smooth, affecting the coefficient of friction u. This causes fluctuations in the linear velocity of the suction belt during operation. The tobacco sticks are then conveyed forward wrapped in a fabric belt, which is directly driven by a belt pulley. Therefore, the synchronization relationship between the belt pulley and the suction belt pulley is that their circumferential linear velocities are the same, meaning the speeds of the fabric belt and the suction belt are equal. However, in actual production applications, both the belt pulley and the suction belt become looser and longer due to the tensioning roller during the production process. Wear of the anti-slip belt or transmission errors cause a certain deviation in the linear speed of the belt and the suction belt, affecting the tobacco density and thus the quality of the cigarette. Currently, when the tension or linear speed of the cigarette gun belt changes, it is only possible to judge whether the belt needs to be replaced based on manual experience. It is also possible to manually adjust the overspeed coefficient of the cigarette gun belt (this parameter is used to set the percentage increase in belt speed) based on experience, and then adjust the speed of the belt pulley servo motor through the input cigarette gun belt overspeed system to make the linear speed of the belt and the suction belt more consistent. Automatic adjustment cannot be achieved, which brings certain quality risks to the cigarette. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for controlling the suction belt, cloth belt and transmission device of a cigarette machine, which realizes the automatic control of the suction belt, cloth belt and transmission device, improves the performance of the equipment, and thus improves the quality of cigarettes and product quality.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] An embodiment of the present invention provides a method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine, comprising the following steps:

[0007] Real-time acquisition of the linear velocity of the suction ribbon and the linear velocity of the fabric tape;

[0008] Based on the obtained suction tape speed and fabric tape speed, the percentage by which the fabric tape speed lags behind the suction tape speed is calculated:

[0009] When the obtained percentage exceeds the set adjustment range, a signal to replace the belt or belt drive device is issued. When the obtained percentage does not exceed the set adjustment range, the speed of the belt pulley servo motor in the belt drive device is adjusted according to the obtained percentage so that the linear speed of the suction belt and the linear speed of the belt are consistent.

[0010] Optionally, the linear velocity of the suction ribbon can be obtained as follows:

[0011] The rotational angular velocity of the suction ribbon driven wheel is obtained in real time, and the linear velocity of the suction ribbon is obtained based on the rotational angular velocity and radius of the suction ribbon driven wheel.

[0012] Optionally, the rotational angular velocity of the suction ribbon driven wheel can be obtained through a magnetic sensor and a magnetic core mounted on the suction ribbon driven wheel and cooperating with the magnetic sensor.

[0013] Optionally, multiple magnetic cores are arranged at equal intervals along the circumferential direction on the driven wheel of the suction ribbon.

[0014] Alternatively, the linear velocity of the fabric belt can be obtained as follows:

[0015] The rotational angular velocity of the driven pulley of the belt is obtained in real time, and the linear velocity of the belt is obtained based on the rotational angular velocity of the driven pulley and the radius of the driven pulley.

[0016] Optionally, the rotational angular velocity of the belt driven pulley can be obtained through a magnetic sensor and a magnetic core mounted on the belt driven pulley and cooperating with the magnetic sensor.

[0017] Optionally, multiple magnetic cores are arranged at equal intervals along the circumferential direction on the driven pulley of the belt.

[0018] Optionally, the linear speeds of the front suction belt and the front fabric belt are acquired in real time, and the linear speeds of the rear suction belt and the rear fabric belt are acquired in real time. Based on the acquired linear speeds, a first percentage is calculated where the linear speed of the front fabric belt lags behind the linear speed of the front suction belt, and a second percentage is calculated where the linear speed of the rear fabric belt lags behind the linear speed of the rear suction belt. When either the first or second percentage exceeds a set adjustment range, a signal is issued to replace the fabric belt or the fabric belt drive device. Otherwise, the rotational speed of the fabric belt pulley servo motor in the fabric belt drive device is adjusted according to the average of the first and second percentages to ensure that the linear speeds of the suction belt and the fabric belt are consistent.

[0019] Optionally, the adjustment range can be set to 0%-2%.

[0020] Optionally, the linear speed of the suction ribbon can be acquired in real time. When the fluctuation value of the linear speed of the suction ribbon exceeds the set limit, or when the linear speed of the suction ribbon can no longer keep up with the linear speed of the cigarette machine host, a signal is issued to replace the suction ribbon or the suction ribbon transmission device.

[0021] The beneficial effects of this invention are as follows:

[0022] The control method of this invention acquires the linear speed of the suction belt and the fabric belt in real time. Then, based on the acquired linear speed, it calculates the percentage by which the fabric belt's linear speed lags behind the suction belt's linear speed. Based on this percentage, it determines whether the fabric belt needs to be replaced, or adjusts the rotation speed of the fabric belt pulley servo motor based on the percentage, thereby ensuring that the linear speeds of the suction belt and the fabric belt remain consistent. The entire process is automated, avoiding manual judgment of whether the fabric belt needs to be replaced and avoiding manual adjustment of the overspeed coefficient of the cigarette gun fabric belt based on experience, thus adjusting the rotation speed of the fabric belt pulley servo motor. This improves equipment performance, thereby improving cigarette quality and product quality. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0024] Figure 1 This is a flowchart of the control method in Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the improvement of the driven wheels of the front and rear suction ribbons in the control method of Embodiment 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of the improvement of the driven wheels of the front and rear conveyor belts in the control method of Embodiment 1 of the present invention;

[0027] Figure 4 This is a schematic diagram of the control principle of Embodiment 1 of the present invention; Detailed Implementation

[0028] Example 1

[0029] This embodiment provides a method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine, such as... Figure 1As shown, the process includes the following steps: Real-time acquisition of the linear velocities of the suction belt and the fabric belt; calculation of the percentage by which the fabric belt's linear speed lags behind the suction belt's linear speed based on the acquired suction belt and fabric belt linear speeds; when the percentage exceeds a set adjustment range, the fabric belt is considered to have overshooted and failed, and a signal is issued to replace the fabric belt or its drive mechanism. This indicates the need to replace the fabric belt and related anti-slip belts, or to inspect and repair the fabric belt drive mechanism. The fabric belt drive mechanism includes a fabric belt pulley servo motor, a fabric belt drive pulley, and a fabric belt driven pulley. In this embodiment, when the percentage does not exceed the set adjustment range, the servo controller adjusts the rotation speed of the fabric belt pulley servo motor to ensure that the linear speeds of the fabric belt and the suction belt are consistent.

[0030] Specifically, the cigarette rolling machine is a dual-stage cigarette rolling machine, with both the suction belt and the cloth belt including a front stage and a rear stage.

[0031] The control method in this embodiment specifically includes the following steps:

[0032] Step 1: Obtain the linear velocity of the front suction ribbon, the front fabric tape, the back suction ribbon, and the back fabric tape.

[0033] The method for obtaining linear velocity is as follows: collect the pulse signals of the front suction belt and the driven wheel of the fabric belt, collect the pulse signals of the rear suction belt and the driven wheel of the fabric belt, convert the pulse signals into linear velocity, and obtain the linear velocities of the front and rear suction belts and the front and rear fabric belts.

[0034] In this embodiment, the linear velocity of the front suction ribbon and the rear suction ribbon is obtained using the same method, specifically, as follows: Figure 2 As shown, multiple magnetic cores are installed on the driven wheels of the front and rear suction ribbons. Preferably, the magnetic cores are cylindrical. Four magnetic cores are installed on the driven wheels of the suction ribbons, and the four magnetic cores are equally spaced along the circumference. Correspondingly, magnetic sensors that cooperate with the magnetic cores are installed. The magnetic sensors can be installed on the frame on one side of the driven wheel of the suction ribbon or in other positions. Those skilled in the art can set them according to actual needs. The magnetic sensor corresponding to the driven wheel of the front suction ribbon is magnetic sensor B1, and the magnetic sensor corresponding to the driven wheel of the rear suction ribbon is magnetic sensor B2.

[0035] The method for obtaining the linear velocity of the front suction ribbon is as follows:

[0036] Step a: First, obtain the rotational angular velocity of the driven wheel of the front suction ribbon. Specifically, the driven wheel of the front suction ribbon generates 4 pulses for one revolution, and a total of 80 pulses are measured. Calculate the corresponding time t1, then the rotational angular velocity of the driven wheel of the front suction ribbon is w1 = 20 x 2π / t1.

[0037] Step b: Based on the rotation angle of the driven wheel of the front suction belt and the radius r of the driven wheel of the front suction belt, obtain the linear velocity v1 = w1 xr of the front suction belt.

[0038] Using the same method, the linear velocity v2 of the driven wheel of the rear suction ribbon can be obtained by using the magnetic core installed on the driven wheel of the rear suction ribbon and the corresponding magnetic sensor.

[0039] In this embodiment, the methods for obtaining the linear velocity of the preceding and following webbing are the same, specifically, as follows: Figure 3 As shown, multiple magnetic cores are installed on the driven pulleys of the front and rear conveyor belts. Preferably, the magnetic cores are cylindrical, and four magnetic cores are installed on each driven pulley. The four magnetic cores are evenly spaced along the circumferential direction. Correspondingly, magnetic sensors that cooperate with the magnetic cores are installed. The magnetic sensors can be installed on a frame on one side of the driven pulley or in other locations. Those skilled in the art can set them according to actual needs. The magnetic sensor corresponding to the front driven pulley is magnetic sensor B3, and the magnetic sensor corresponding to the rear driven pulley is magnetic sensor B4.

[0040] The method for obtaining the linear velocity of the preceding conveyor belt is as follows:

[0041] Step (1) First, obtain the rotational angular velocity of the driven wheel of the front conveyor belt. Specifically, the driven wheel of the front conveyor belt generates 4 pulses for one revolution. A total of 80 pulses are measured. Calculate the corresponding time t3. Then the rotational angular velocity of the driven wheel of the front suction belt is w3 = 20x2π / t3.

[0042] Step (2): Based on the rotation angle of the driven wheel of the front belt and the radius r of the driven wheel of the front belt, the linear velocity v3 = w3xr of the front belt is obtained.

[0043] The same method can be used to obtain the linear velocity v4 of the subsequent conveyor belt.

[0044] Step 2: Calculate the percentage by which the speed of the preceding fabric tape lags behind the speed of the preceding suction tape, and calculate the percentage by which the speed of the following fabric tape lags behind the speed of the following suction tape.

[0045] Specifically, the percentage by which the linear speed of the preceding fabric tape lags behind the linear speed of the preceding suction tape is called the first percentage A1, which is calculated as the ratio of the difference between the linear speeds of the preceding suction tape and the preceding fabric tape to the linear speed of the preceding suction tape:

[0046] That is, A1 = (v1 - v3) / v1.

[0047] Similarly, we can obtain the second percentage, A2, that the speed of the subsequent fabric tape lags behind the speed of the subsequent suction tape.

[0048] That is, A2 = (v2 - v4) / v2.

[0049] Step 3: When the obtained percentage exceeds the set adjustment range, that is, when the obtained percentage is greater than the upper limit of the set range, a signal to replace the belt or belt drive device is issued. When the obtained percentage does not exceed the set adjustment range, that is, when the obtained percentage is not greater than the upper limit of the set adjustment range, the obtained percentage is used as the overspeed coefficient of the smoke gun belt to adjust the speed of the belt pulley servo motor in the belt drive device so that the linear speed of the suction belt and the linear speed of the belt are consistent.

[0050] Specifically, when either the first percentage A1 or the second percentage A2 exceeds the set adjustment range, that is, if either the first percentage or the second percentage is greater than the upper limit of the set adjustment range, the over-adjustment of the belt is deemed to be malfunctioning. At this time, a signal to replace the belt or the belt drive device is issued. The staff needs to replace the belt and the corresponding anti-slip belt, and promptly check and replace or repair the belt drive device.

[0051] Preferably, the adjustment range is 0%-2%, with an upper limit of 2%.

[0052] When the first percentage A1 and the second percentage A2 are both within the set adjustment range, that is, when the first percentage and the second percentage are not greater than the upper limit of the set adjustment range, the average value of the two is calculated as A = (A1 + A2) / 2.

[0053] In this embodiment, the calculated average value A is the overspeed coefficient of the tobacco pipe belt. Based on the calculated overspeed coefficient, the rotation speed of the belt pulley servo motor is adjusted by the servo controller to keep the linear speed of the suction belt and the fabric belt consistent (the difference between the linear speeds of the suction belt and the fabric belt is less than the first difference limit). In this embodiment, the method of adjusting the rotation speed of the belt pulley servo motor by the servo controller based on the overspeed coefficient of the tobacco pipe belt is existing technology. The control program itself has relevant overspeed coefficient variables. After obtaining the overspeed coefficient of the tobacco pipe belt, the adjustment amount of the rotation speed of the belt pulley servo motor can be obtained. Existing technology can be used, and it will not be described in detail here.

[0054] Furthermore, this embodiment also acquires the linear speed of the suction ribbon in real time. When the linear speed of the suction ribbon fluctuates frequently and exceeds the set limit, or when the linear speed of the suction ribbon cannot keep up with the speed of the cigarette machine host, that is, when the difference between the linear speed of the suction ribbon and the linear speed of the host is greater than the second difference limit, a signal is issued to request the replacement of the suction ribbon or the suction ribbon transmission device. The suction ribbon transmission device includes a suction ribbon wheel servo motor, a suction ribbon drive wheel, a suction ribbon driven wheel, etc.

[0055] In this embodiment, as Figure 4As shown, the pulse signals of the four magnetic sensors in step 1 are collected by the oversampling module EL1262 and transmitted to the IPC Beckhoff controller. The IPC Beckhoff controller calculates the linear speed of the front and rear suction tapes and the fabric tape and connects to the industrial control computer of the human-machine interaction system through the TCP / IP protocol. The calculated linear speed quantization data parameters are set and displayed on the industrial control computer of the human-machine interaction system in the form of curve display. In this embodiment, the IPC Beckhoff controller also receives the linear speed signal of the host in real time. When the linear speed of the suction tape fluctuates frequently and exceeds the set limit, or when the linear speed cannot keep up with the speed of the host, a signal is issued to replace the suction tape or the suction tape transmission device.

[0056] When the linear speed of any belt falls behind the suction belt's linear speed by a percentage exceeding the set adjustment range, the belt is deemed to have reached the replacement standard. At this point, a signal will be sent to replace the belt or anti-slip belt, or to check the belt drive device.

[0057] The method described in this embodiment automates the entire process, eliminating the need for manual judgment on whether the belt needs to be replaced and avoiding manual adjustment of the overspeed coefficient of the cigarette pack based on experience. This improves equipment performance, thereby enhancing cigarette quality and product quality.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for regulating the suction tape, cloth tape and transmission device of a cigarette making machine, characterized in that, Includes the following steps: Real-time acquisition of the linear velocity of the suction ribbon and the linear velocity of the fabric tape; Based on the obtained suction tape speed and fabric tape speed, the percentage by which the fabric tape speed lags behind the suction tape speed is calculated: When the obtained percentage exceeds the set adjustment range, a signal to replace the belt or belt drive device is issued. When the obtained percentage does not exceed the set adjustment range, the speed of the belt pulley servo motor in the belt drive device is adjusted according to the obtained percentage so that the linear speed of the suction belt and the linear speed of the belt are consistent. The linear velocities of the front suction tape and the front fabric tape are acquired in real time. The linear velocities of the rear suction tape and the rear fabric tape are also acquired in real time. Based on the acquired linear velocities, the first percentage A1 is calculated where the linear velocity of the front fabric tape lags behind the linear velocity of the front suction tape, A1 = (v1 - v3) / v1. Based on the acquired linear velocities, the second percentage A2 is calculated where the linear velocity of the rear fabric tape lags behind the linear velocity of the rear suction tape, A2 = (v2 - v4) / v2. Where v1 is the linear velocity of the front suction belt; v2 is the linear velocity of the driven wheel of the rear suction belt; v3 is the linear velocity of the front fabric belt; and v4 is the linear velocity of the rear fabric belt. When the first percentage or the second percentage exceeds the upper limit of the set adjustment range, a belt replacement signal is issued; otherwise, based on the average value of the first percentage and the second percentage, A=(A1+A2) / 2, the rotation speed of the belt pulley servo motor in the belt drive device is adjusted so that the linear speed of the suction belt and the linear speed of the belt are consistent. The set adjustment range is 0%-2%, with an upper limit of 2%.

2. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 1, characterized in that, The method for obtaining the linear velocity of the suction ribbon is as follows: The rotational angular velocity of the suction ribbon driven wheel is obtained in real time, and the linear velocity of the suction ribbon is obtained based on the rotational angular velocity and radius of the suction ribbon driven wheel.

3. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 2, characterized in that, The rotational angular velocity of the suction ribbon driven wheel is obtained through a magnetic sensor and a magnetic core mounted on the suction ribbon driven wheel and cooperating with the magnetic sensor.

4. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 3, characterized in that, Multiple magnetic cores are evenly spaced along the circumference of the driven pulley of the suction ribbon.

5. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 1, characterized in that, The method for obtaining the linear velocity of the fabric tape is as follows: The rotational angular velocity of the driven pulley of the belt is obtained in real time, and the linear velocity of the belt is obtained based on the rotational angular velocity of the driven pulley and the radius of the driven pulley.

6. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 5, characterized in that, The rotational angular velocity of the belt driven pulley is obtained through a magnetic sensor and a magnetic core mounted on the belt driven pulley and cooperating with the magnetic sensor.

7. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 6, characterized in that, Multiple magnetic cores are evenly spaced along the circumferential direction on the driven pulley of the cloth belt.

8. The method for adjusting the suction belt, cloth belt, and transmission device of a cigarette rolling machine as described in claim 1, characterized in that, The linear speed of the suction ribbon is acquired in real time. When the fluctuation value of the linear speed of the suction ribbon exceeds the set limit, or when the linear speed of the suction ribbon can no longer keep up with the linear speed of the cigarette machine main unit, a signal is issued to replace the suction ribbon or the suction ribbon transmission device.

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