Motor speed adjustment method for production equipment of square bottom bags with handles

Abstract

The present invention discloses a motor speed regulating method for a production device of a square bottom bag with a handle. The production device comprises a control module, a storage module, a conveying module, a speed detection module and a motor, comprising: given different paper roll materials, measuring and generating an XY curve of the relationship between the paper roll material, the motor speed and the paper roll forward speed and storing it in the storage module; a user inputs the paper roll material and size parameters of a target product in the control module, and the control module calculates the target forward speed V of the paper roll according to the size parameters. 目 , and then according to the paper roll material, target forward speed V 目 The corresponding motor speed value is retrieved from the storage module and recorded as N0; the preset time length T is a cycle period, n is set as a natural number initially 1, and the initial speed of the motor in the nth cycle period is N n , and N1=N0, the control module adjusts the motor in real time. The present invention can realize dynamic adjustment of the motor speed to ensure that the forward speed of the paper roll can meet the production requirements, thereby improving product quality.

Description

Technical Field

[0001] The invention relates to the technical field of paper bag processing, in particular to a method for adjusting the motor speed of a production device for square bottom bags with handles. Background Art

[0002] Square bottom bags, also known as square bags, are often used in the outer packaging of boxes for clothing, shoes, cosmetics, electronic devices and other products, or directly used for the outer packaging of food. Its main function is to cover the packaged products to prevent dust, moisture and oxidation, and it also looks beautiful after packaging.

[0003] The existing square bottom bag production equipment with handles uses paper rolls as raw materials, and processes the paper rolls into several shaped square bottom bags through processes such as feeding, gluing, folding, bag side gluing, cutting, breaking, bottom folding, bag bottom gluing, and finished product collection. In production, the function of the cutting process is mainly to cut the paper rolls that have been folded and bag side gluing into a cylindrical shape at the handle position to facilitate the subsequent process to break; and in the process of continuous production, the size parameters of the target product (hereinafter mainly involving the length size) are fixed and unique, that is, the cutting frequency f of the equipment's cutting knife is fixed. According to calculations, the length L of the cylindrical paper roll after cutting and breaking is V / f, where V is the forward speed of the paper roll. When the cutting frequency f is a fixed value, the forward speed V of the paper roll is required to remain stable to ensure the uniform size of the finished square bottom bags of the same batch and improve production quality.

[0004] In existing equipment, the motor usually drives the active roller to rotate to drive the paper roll forward, and several driven rollers are used to tension the paper roll to complete the feeding action of the paper roll. The motor and the active roller are usually driven by a belt. In continuous and uninterrupted production, factors such as the transmission efficiency of the belt, the resistance of the driven roller during rotation, the material of the paper roll (involving the friction coefficient between the paper rolls), and the size of the paper roll (involving the resistance when the paper roll rotates) will affect the forward speed of the paper roll, resulting in unstable forward speed of the paper roll, and the final size of the products in the same batch is not uniform, which cannot meet the product demand with high quality requirements. For this reason, the motor as a power source needs to have a dynamic adjustment process to ensure the stability of the forward speed of the paper roll. Summary of the invention

[0005] The object of the present invention is to provide a method for adjusting the motor speed of a square bottom bag with handle production equipment, so as to realize dynamic adjustment of the motor speed to ensure that the forward speed of the paper roll can meet the production requirements, thereby improving the product quality.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] A method for adjusting the motor speed of a square bottom bag with handle production equipment, the production equipment having a control module, a storage module, a conveying module, a speed detection module and a motor, comprising the following steps:

[0008] Step 1: Use paper rolls of different materials for feeding, and set different motor speeds. The speed detection module collects the average forward speed of the paper roll in unit time under different motor speeds in turn and sends it to the control module, generates an XY curve of the relationship between paper roll material, motor speed and paper roll forward speed, and stores it in the storage module;

[0009] Step 2: The user inputs the paper roll material and size parameters of the target product into the control module, and the control module calculates the target forward speed V of the paper roll according to the size parameters. 目 , and then according to the paper roll material, target forward speed V 目 Retrieving a corresponding motor speed value from the storage module, denoted as N0;

[0010] Step 3: Set the preset duration T as a cycle, set n to a natural number initially set to 1, and set the motor initial speed of the nth cycle to N. n , and N1=N0, the control module adjusts the motor in real time:

[0011] 3.1. In the nth cycle, the motor rotates at an initial speed N. n The conveying module is driven to make the paper roll move forward and feed the paper, and the speed detection module measures the real-time forward speed V of the paper roll in real time. 实 And send it to the control module to adjust the real-time speed of the motor - if V 实 <V 目 The control module performs PID control to accelerate the motor. 实 >V 目 Then the control module executes PID control to decelerate the motor;

[0012] 3.2. The speed detection module measures the real-time speed of the motor in real time and sends it to the control module, and the control module calculates the average value A of the real-time speed of the motor in the current cycle. n , and add 1 to n;

[0013] 3.3, when n<3, N n =N0, return to step 3.1; when n≥3, N n =(A1+A2+...+A n-1 ) / (n-1), return to step 3.1.

[0014] In step 3, an infrared speed meter is used to detect the forward speed of the square bottom bag handle to obtain the real-time forward speed V of the paper roll. 实 ; and using an angular velocity sensor to detect the rotation speed of the motor shaft to obtain the real-time rotation speed of the motor.

[0015] In step 3, the duration T of the cycle is 5-10s.

[0016] In step 3.2, the speed detection module collects the forward speed of the paper roll every 0.01-0.1s, and the control module calculates the average value of the speeds of the most recent 50-100 times as the real-time forward speed V of the paper roll. 实 .

[0017] After adopting the above technical solution, the present invention has the following technical effects:

[0018] ① Compared with the unchanging motor speed in the prior art, the PID control can be performed by the control module during the continuous operation of the production equipment to continuously and dynamically adjust the real-time speed of the motor, so that the real-time forward speed V of the paper roll is 实 Continuously approaching the target forward speed V 目 , thereby ensuring that the forward speed of the paper roll can meet the actual production needs, thereby improving the size uniformity of the same batch of products and improving product quality;

[0019] ② In steps 1 and 2, by generating an XY curve, the production equipment can quickly adapt the paper roll material and size parameters of different target products during the startup phase, so that the real-time forward speed V of the paper roll after the motor is started 实 It can approach the target forward speed V more quickly. 目 , the required correction time is shorter, ensuring the processing accuracy when the production equipment is just started;

[0020] ③ In step 3, through the continuous superposition of cycles, after two cycles, the average speed of the previous cycle is used as the initial speed of the current cycle. The real-time forward speed V corresponding to the initial speed is 实 The target forward speed V will be approached 目 , and the speed change range is getting smaller and smaller, ultimately achieving continuous improvement and stabilization of the processing accuracy of production equipment;

[0021] ④ Since the present invention dynamically adjusts the motor speed during the continuous production process, it can respond in time when external factors change. For example, when factors such as the impact of belt aging on transmission efficiency and the reduction of paper roll's own resistance affect the forward speed of the paper roll, the control module can adjust the real-time motor speed in time to avoid excessive fluctuations in the quality of the same batch of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a flow chart of a specific embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of an XY curve of a specific embodiment of the present invention;

[0024] Figure 3 This is a comparison table of the initial speed of the motor in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of the present invention to be protected.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the embodiments of the present invention, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use, or is the orientation or position relationship commonly understood by those skilled in the art. It is only to simplify the description for the convenience of describing the embodiments of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0034] Furthermore, the present invention provides examples of various specific processes and materials, but a person skilled in the art may recognize the application of other processes and / or the use of other materials.

[0035] refer to Figure 1 As shown, the present invention discloses a motor speed regulation method for a production device for square bottom bags with handles, the production device comprises a control module, a storage module, a conveying module, a speed detection module and a motor, and comprises the following steps:

[0036] Step 1: Use paper rolls of different materials for feeding and set different motor speeds. The speed detection module collects the average forward speed of the paper roll in unit time under different motor speeds and sends it to the control module. An XY curve of the relationship between paper roll material, motor speed and paper roll forward speed is generated and stored in the storage module. Figure 2 (This is just an example, not an actual correspondence);

[0037] Step 2: The user inputs the paper roll material and size parameters of the target product into the control module, and the control module calculates the target forward speed V of the paper roll based on the size parameters. 目 , and then according to the paper roll material, target forward speed V 目 Retrieve the corresponding motor speed value from the storage module, denoted as N0;

[0038] Step 3: Set the preset duration T as a cycle, set n to a natural number initially set to 1, and set the motor initial speed of the nth cycle to N. n , and N1=N0, the control module adjusts the motor in real time:

[0039] 3.1. In the nth cycle, the motor rotates at the initial speed N. n The conveying module is driven to make the paper roll move forward and the speed detection module measures the real-time forward speed V of the paper roll in real time. 实 And send it to the control module to adjust the real-time speed of the motor - if V 实 <V 目 The control module executes PID control to accelerate the motor. 实 >V 目 Then the control module executes PID control to slow down the motor;

[0040] 3.2. The speed detection module measures the real-time speed of the motor and sends it to the control module. The control module calculates the average value A of the real-time speed of the motor in the current cycle. n , and add 1 to n;

[0041] 3.3, when n<3, N n =N0, return to step 3.1; when n≥3, N n =(A1+A2+...+A n-1 ) / (n-1), return to step 3.1, the relationship between the cycle period and the initial speed of the motor can be found in Figure 3 .

[0042] Specific embodiments of the present invention are shown below.

[0043] In the present invention, the motor is a servo motor, which can achieve higher output accuracy and stability.

[0044] In the above step 3, an infrared speed meter is used to detect the forward speed of the square bottom bag handle to obtain the real-time forward speed V of the paper roll. 实 ; and using an angular velocity sensor to detect the rotation speed of the motor shaft to obtain the real-time rotation speed of the motor.

[0045] In the above step 3, the duration T of the cycle is 5-10s, or can be adjusted to other values ​​according to actual production requirements.

[0046] In the above step 3.2, the above speed detection module collects the forward speed of the paper roll every 0.01-0.1s, and the control module calculates the average value of the speeds of the most recent 50-100 times as the real-time forward speed V of the paper roll. 实 , effectively reducing the external factors on V 实 If the current speed of the paper roll is collected for the 200th time, the average of the 101st to 200th speeds can be used as the real-time speed V for the 200th time. 实 .

[0047] Through the above scheme, compared with the unchanging motor speed in the prior art, the present invention can perform PID control through the control module during the continuous operation of the production equipment to continuously and dynamically adjust the real-time speed of the motor, so that the real-time forward speed V of the paper roll is constant. 实 Continuously approaching the target forward speed V 目 , thereby ensuring that the forward speed of the paper roll can meet the actual production needs, thereby improving the size uniformity of the same batch of products and improving product quality; in steps 1 and 2, by generating XY curves, the production equipment can quickly adapt to the paper roll materials and size parameters of different target products during the startup phase, so that the real-time forward speed V of the paper roll after the motor is started 实 It can approach the target forward speed V more quickly. 目 , the required correction time is shorter, ensuring the processing accuracy when the production equipment is just started; in step 3, through the continuous superposition of cycles, after two cycles, the average speed of the previous cycle is used as the initial speed of the current cycle, and the real-time forward speed V corresponding to the initial speed 实 The target forward speed V will be approached 目 , and the speed change range is getting smaller and smaller, and finally the processing accuracy of the production equipment is continuously improved and stabilized; because the present invention dynamically adjusts the motor speed during continuous production, it can respond in time when external factors change. For example, when factors such as the influence of belt aging on transmission efficiency and the decrease in the resistance of the paper roll itself affect the forward speed of the paper roll, the control module can adjust the real-time motor speed in time to avoid excessive fluctuations in the quality of the same batch of products.

[0048] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A method for adjusting the motor speed of a square bottom bag with handle production equipment, characterized in that: The production equipment comprises a control module, a storage module, a conveying module, a speed detection module and a motor, wherein the conveying module comprises an active roller and a plurality of driven rollers, the motor drives the active roller through a belt, the active roller is used to convey a paper roll, and the driven roller tensions the paper roll, and the speed detection module comprises an infrared speed meter and an angular velocity sensor; the production equipment comprises the following steps: Step 1, using paper rolls of different materials for feeding, and setting different motor speeds, the infrared speed meter sequentially collects the average value of the paper roll forward speed per unit time under different motor speeds and sends it to the control module, generates an XY curve of the relationship between paper roll material, motor speed and paper roll forward speed, and stores it in the storage module; Step 2: The user inputs the paper roll material and size parameters of the target product into the control module, and the control module calculates the target forward speed V of the paper roll according to the size parameters. 目 , and then according to the paper roll material, target forward speed V 目 Retrieving a corresponding motor speed value from the storage module, denoted as N0; Step 3: Set the preset duration T as a cycle, set n to a natural number initially set to 1, and set the motor initial speed of the nth cycle to N. n , and N1=N0, the control module adjusts the motor in real time: 3.

1. In the nth cycle, the motor rotates at an initial speed N. n The conveying module is driven to advance the paper roll and the infrared speed meter measures the real-time forward speed V of the paper roll in real time. 实 And send it to the control module to adjust the real-time speed of the motor - if V 实 <V 目 The control module performs PID control to accelerate the motor. 实 >V 目 Then the control module executes PID control to decelerate the motor; 3.

2. The angular velocity sensor measures the real-time speed of the motor in real time and sends it to the control module, and the control module calculates the average value A of the real-time speed of the motor in the current cycle. n , and add 1 to n; 3.3, when n<3, N n =N0, return to step 3.1; when n≥3, N n =(A1+A2+...+A n-1 ) / (n-1), return to step 3.

1.

2. The motor speed adjustment method for the production equipment of square bottom bags with handles according to claim 1 is characterized in that: In step 3, the duration T of the cycle is 5-10s.

3. The motor speed adjustment method for the production equipment of square bottom bags with handles according to claim 1 is characterized in that: In step 3.2, the angular velocity sensor collects the forward speed of the paper roll every 0.01-0.1s, and the control module calculates the average value of the rotation speeds of the most recent 50-100 times as the real-time forward speed V of the paper roll. 实 .

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