Transverse sealing hot knife positioning method of flexible material bag making machine and electronic equipment

Abstract

The invention relates to the technical field of industrial automation, in particular to a transverse sealing hot knife positioning method of a flexible material bag making machine and electronic equipment, the method is achieved based on the flexible material bag making machine, and the bag making machine comprises a module position detection assembly, a position deviation detection assembly and a hot knife assembly; the method comprises the steps that a control center generates a first position deviation value corresponding to each hot knife module according to deviation information detected by a position deviation detection assembly and current first position information, detected by a module position detection assembly, of each hot knife module; and the control center generates a first position adjusting instruction corresponding to each hot knife module according to the position deviation value corresponding to each hot knife module and sends the first position adjusting instruction to the corresponding hot knife module, so that the hot knife module adjusts the position of the hot knife module according to the received first position adjusting instruction. The device has the beneficial effects that the position of the hot knife can be adjusted in real time along with deformation of a flexible material, the quality of a finished product is improved, and waste of raw materials is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of industrial automation, and in particular to a method for positioning a transverse sealing knife of a flexible material bag making machine and electronic equipment. Background Art

[0002] The process requirements of flexible material bag making machines, whether it is a three-side sealed or center sealed bag type, require multiple hot pressing with a hot knife to complete the bag forming. The same hot seam needs to be pressed by different hot knives at different times, but the position of each hot knife impression relative to the pattern must be consistent. Usually, the current bag making machine hot knife system has 3 or more hot knives, and the positioning of each hot knife usually relies on manual lateral positioning, that is, according to different bag types and patterns, the horizontal hot knife is manually moved to the hot seam position specified in the design, so that each hot knife keeps a consistent distance from the pattern, thereby achieving the overlapping of the hot seams of each hot knife. For such a hot knife system, when the printed pattern does not change much and the material stretches less after hot pressing, it can be considered that the hot seam position required by the design remains basically unchanged. Therefore, manually moving the hot knife to determine the position of the hot seam can basically meet the needs.

[0003] However, in actual production, the printing, compounding, and aging before the bag-making process will cause changes in the tension and temperature of the flexible material, which will cause the length of the printed pattern to change to a certain extent. In addition, in the bag-making process, the flexible material is constantly pressed in the environment of the hot knife heating, and is constantly pulled and stopped by the bag-making machine. Therefore, the tension fluctuates greatly, that is, when the printed pattern of the flexible material passes through the hot knife, the length of the printed pattern will change greatly, especially for thin materials that are sensitive to heat and easy to stretch, such as single-material PE molds. In the prior art, the hot pressing method with a fixed hot knife position will cause the relative position of the hot seam and the pattern to change continuously, and the hot seams of the front and rear hot knives cannot overlap, which affects the quality of the product and generates a lot of waste. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a method and electronic equipment for positioning the transverse sealing knife of a flexible material bag making machine, which solves the technical problem that the prior art cannot adjust the position of the hot knife in real time based on the deformation of the flexible material, thereby causing a decrease in the quality of the finished product and a waste of raw materials.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, an embodiment of the present invention provides a method for positioning a transverse sealing knife of a flexible material bag making machine, the method being implemented based on the flexible material bag making machine, the bag making machine comprising a module position detection component, a position deviation detection component and a hot knife component; the method comprising:

[0009] S11, the control center generates a first position deviation value corresponding to each hot knife module according to the deviation information detected by the position deviation detection component and the current first position information of each hot knife module detected by the module position detection component;

[0010] The deviation information is information reflecting the deformation amount of the flexible material;

[0011] S12, the control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends the first position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received first position adjustment instruction;

[0012] The ironing knife assembly includes at least one ironing knife module.

[0013] Optionally, the position deviation detection component includes: a first scanning photoelectric device located at the discharge side of the ironing knife component and a second scanning photoelectric device located at the feed side of the ironing knife component;

[0014] The S11 includes:

[0015] The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric and the second color mark position information detected by the second scanning photoelectric, and the hot knife position proportional coefficient pre-calibrated by each hot knife module;

[0016] The control center obtains the first position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the current first position information of each hot knife module detected by the module position detection component;

[0017] The deviation information includes the first color mark position information and the second color mark position information;

[0018] The first color mark position information and the second color mark position information are both position information of a color mark pre-set on the flexible material within the detection area detected by the scanning photoelectric detection;

[0019] At this time, the first position deviation value includes the distance and direction of the deviation between the first position information corresponding to the hot knife module and the target position;

[0020] The S12 includes:

[0021] The control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends it to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received first position adjustment instruction.

[0022] Optionally, the S11 includes:

[0023] The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric, the second color mark position information detected by the second scanning photoelectric, the pre-calibrated hot knife position proportional coefficient of each hot knife module, and the pre-set formula 1; the formula 1 is:

[0024] H s =S 11 +K1(S 21 -S 11 );

[0025] Among them, H s is the target position corresponding to each hot knife module, S 11 is the first color mark position information, S 21 is the second color mark position information, K1 is the ironing knife position proportional coefficient pre-calibrated for each ironing knife module;

[0026] The control center obtains the position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the current first position information of each hot knife module detected by the module position detection component.

[0027] Optionally, before S11, the step further includes:

[0028] S01. When the control center receives a one-key cutter arrangement instruction for the bag making machine input by the user, the control center generates the expected position information of each hot cutter module according to the pre-set flexible material information;

[0029] The flexible material information includes the length information of the flexible material, the standard position information of the color mark on the flexible material and the process requirements;

[0030] S02, the control center determines whether there is a deviation between the current position and the expected position of each hot knife module according to the expected position information of each hot knife module and the current second position information of each hot knife module detected by the module position detection mechanism;

[0031] If it exists, the second position deviation value corresponding to each hot knife module is obtained according to the second position information and the expected position information of the hot knife module;

[0032] S03, the control center generates a second position adjustment instruction corresponding to each hot knife module according to the second position deviation value corresponding to each hot knife module and sends the second position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received second position adjustment instruction;

[0033] The second position deviation value includes the distance and direction of the deviation between the second position information corresponding to the hot knife module and the expected position.

[0034] Optionally, before S11, the step further includes:

[0035] S01. When the control center receives a one-key cutter arrangement instruction for the bag making machine input by the user, the control center generates the expected position information of each hot cutter module according to the pre-set flexible material information;

[0036] The flexible material information includes the length information, color mark position information and process requirements of the flexible material;

[0037] S02, the control center determines whether there is a deviation between the current position and the expected position of each hot knife module according to the expected position information of each hot knife module and the current second position information of each hot knife module detected by the module position detection mechanism;

[0038] If it exists, the second position deviation value corresponding to each hot knife module is obtained according to the second position information and the expected position information of the hot knife module;

[0039] S03, the control center generates a second position adjustment instruction corresponding to each hot knife module according to the second position deviation value corresponding to each hot knife module and sends the second position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received second position adjustment instruction;

[0040] The second position deviation value includes the distance and direction of the deviation between the second position information corresponding to the hot knife module and the expected position;

[0041] S04, when the control center receives the position calibration instruction input by the user, the control center detects and records the third color mark position information detected by the first scanning photoelectric and the fourth color mark position information detected by the second scanning photoelectric, as well as the third position information of each hot knife module detected by the module position detection component;

[0042] S05. The control center obtains the ironing knife position proportional coefficient corresponding to each ironing knife module according to the third color mark position information, the fourth color mark position information, the third position information of each current ironing knife module detected by the module position detection component, and the preset formula 2; the formula 2 is:

[0043]

[0044] Among them, S 10 is the third color mark position information, S 20 is the fourth color mark position information, H 10 is the current third position information of each hot knife module detected by the module position detection mechanism, and K1 is the hot knife position proportional coefficient corresponding to each hot knife module.

[0045] Optionally, each of the ironing knife modules comprises an ironing knife body, a servo controller and a servo motor for driving the ironing knife body to move linearly;

[0046] The module position detection mechanism includes a magnetic scale and a reading head fixedly connected to the ironing knife body and corresponding to each other one by one;

[0047] Then, the S11 includes:

[0048] The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric and the second color mark position information detected by the second scanning photoelectric, and the hot knife position proportional coefficient pre-calibrated by each hot knife module;

[0049] The control center obtains a first position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the received first position information detected by the servo controller of each hot knife module;

[0050] The first position information is the relative position information of the reading head fixedly connected to the corresponding hot knife body on the magnetic scale received by the servo controller, that is, the position information of the hot knife body;

[0051] The S12 includes:

[0052] The control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends the instruction to the corresponding servo controller;

[0053] When any servo controller receives the first position adjustment instruction, it controls the corresponding servo motor to rotate according to the first position adjustment instruction, and further controls the corresponding ironing knife body to adjust its own position.

[0054] Optionally, information transmission is achieved between any of the servo controllers and the control center via a MODBUS communication protocol;

[0055] Any of the servo controllers and its corresponding reading head communicate via a third-party protocol or transmit information by counting the number of pulses.

[0056] Optionally, the ironing knife assembly includes n ironing knife modules; then the position deviation detection assembly includes n-1 infrared camera modules; n is a positive integer greater than or equal to 2;

[0057] Along the direction from the feeding port to the discharging port of the bag making machine, except for the first hot knife module, the remaining hot knife modules are fixedly connected to an infrared camera module, and each infrared camera module is used to collect the hot mark temperature difference image of the flexible material at the feeding port of the hot knife module fixedly connected thereto;

[0058] Each of the heat mark temperature difference images is an image of the flexible material after being pressed by a heat knife module in front of the infrared camera module that collects the image;

[0059] Then the S11 includes:

[0060] The control center generates a first position deviation value corresponding to each hot knife module according to the hot mark temperature difference image detected by each infrared camera module and the current first position information of the hot knife module detected by the module position detection component;

[0061] At this time, the first position deviation value is the distance and direction of the current first position information of any other hot knife module except the first hot knife module and the position deviation of the hot mark of the previous hot knife module;

[0062] The deviation information includes a temperature difference image of a burn mark.

[0063] Optionally, the S11 includes:

[0064] The control center obtains the burn mark image detected by each infrared camera at a preset time; the preset time is one action step of the bag making machine;

[0065] When the control center receives the temperature difference image of the burn mark detected by any infrared camera, the position information of the high temperature area in the temperature difference image of the burn mark is obtained according to the preset edge detection algorithm, and the first position deviation value corresponding to the hot knife module fixedly connected to the infrared camera module is obtained according to the position information of the high temperature area in the temperature difference image of the burn mark and the first position information corresponding to the hot knife module fixedly connected to the infrared camera module detected by the module position detection component.

[0066] In a second aspect, an embodiment of the present invention provides an electronic device, characterized in that it includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

[0067] The memory is used to store computer programs;

[0068] The processor is used to implement the transverse sealing knife positioning method of the flexible material bag making machine as described in any one of claims 1 to 9 when executing the program stored in the memory.

[0069] (III) Beneficial effects

[0070] The beneficial effects of the present invention are as follows: a method for positioning a transverse sealing hot knife of a flexible material bag making machine of the present invention uses a module position detection component to detect the position of the hot knife module while detecting deviation information through a deviation detection component. Compared with the prior art, it can follow the deformation of the flexible material and adjust the hot knife position in real time, thereby improving the quality of the finished product and reducing the waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 A flow chart of a method for positioning a transverse sealing knife of a flexible material bag making machine provided in Example 1 of the present invention;

[0072] Figure 2 A flexible material bag making machine provided in Example 2 of the present invention;

[0073] Figure 3 A schematic diagram of scanning photoelectricity provided in Embodiment 2 of the present invention;

[0074] Figure 4 A schematic diagram of a temperature difference image of a burn mark provided in Example 4 of the present invention;

[0075] Figure 5 This is a schematic diagram of the installation of the infrared camera module provided in Example 4 of the present invention.

[0076] [Description of Reference Numerals]

[0077] 1: bag making machine; 10: ironing knife module; 20: first scanning photoelectric; 30: second scanning photoelectric; 21: photoelectric sensor; 40: infrared camera module; 41: camera bracket. DETAILED DESCRIPTION

[0078] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0079] The embodiment of the present invention proposes a method for positioning the transverse sealing iron knife of a flexible material bag making machine 1. Since the module position detection component is used to detect the position of the iron knife module 10, and the deviation detection component is used to detect the deviation information, compared with the prior art, it can follow the deformation of the flexible material and adjust the iron knife position in real time, thereby improving the quality of the finished product and reducing the waste of raw materials.

[0080] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0081] Example 1

[0082] The embodiment of the present invention provides a method for positioning a transverse sealing knife of a flexible material bag making machine 1. The method is implemented based on the flexible material bag making machine 1. The bag making machine 1 includes a module position detection component, a position deviation detection component and a hot knife component. The method, such as Figure 1 As shown, including:

[0083] S11, the control center generates a first position deviation value corresponding to each hot knife module 10 according to the deviation information detected by the position deviation detection component and the current first position information of each hot knife module 10 detected by the module position detection component;

[0084] S12, the control center generates a first position adjustment instruction corresponding to each hot knife module 10 according to the first position deviation value corresponding to each hot knife module 10 and sends the first position adjustment instruction to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received first position adjustment instruction;

[0085] The hot knife assembly includes at least one hot knife module 10 .

[0086] An embodiment of the present invention proposes a method for positioning a transverse sealing hot knife of a flexible material bag making machine 1. The method uses a module position detection component to detect the position of a hot knife module 10, and at the same time, detects deviation information through a deviation detection component. The method can follow the deformation of the flexible material and adjust the hot knife position in real time, thereby improving the quality of the finished product and reducing the waste of raw materials.

[0087] Example 2

[0088] This embodiment provides a flexible material bag making machine 1 as described in Embodiment 1, Figure 2 As shown, it includes: a frame and a front traction, a floating roller, a hot knife assembly, a punch, a rear traction and a cutter along the frame;

[0089] Among them, the front traction and rear traction are the power sources for intermittently pulling the composite film. The upper and lower groups of rubber rollers clamp the composite film for rotational movement, and their positions on the production line are fixed; the floating roller is a guide roller that moves freely in the up and down directions, which plays a role in adjusting the film tension. Each hot knife module 10 in the hot knife assembly is a moving part, and a servo motor is used to drive the lead screw to drive the hot knife module 10 to move forward and backward on the linear guide rail as needed;

[0090] A magnetic strip cut based on the needs is pasted on the magnetic scale guide rail, and the entire magnetic scale guide rail is fixed on the wall panel of the bag making machine 1, that is, the magnetic scale is fixed on the bag making machine 1, and each moving part is fixed with a reading head through an L-shaped plate. The moving part moves back and forth to drive the reading head to move relative to the magnetic scale and can read the actual position.

[0091] Generally, the hot knife assembly includes three hot sealing knives and one cold sealing knife (i.e., four hot knife modules 10). In any hot knife module 10, there is a screw that runs through all moving parts between the lower part of the hot knife body and the base of the bag making machine 1, and is fixed at both ends by a screw fixing seat. The hot knife body is connected to the slider, and the slider is connected to the hot knife moving gear through a thrust bearing, and the moving gear is connected to the servo motor of the moving hot knife body through a synchronous belt gear. On the other side, the hot knife body is fixedly connected to the reading head through an L-shaped plate, and the reading head is perpendicular to the magnetic scale and maintains a certain distance (within a certain error range) to ensure the normal operation of the reading head.

[0092] The magnetic scale customized according to the required length is fixed on the wallboard of the bag making machine 1. The deviation of the magnetic scale in the horizontal and vertical directions meets the requirement of ±100um, which can well ensure the normal operation of the reading head. Each reading head and moving part are reliably fixed. Within the full stroke range, the jumping range of the reading head in the vertical, horizontal and left and right directions should also be within the range of ±500um. Each moving part is driven by its corresponding servo motor through a screw rod. Each moving part is provided with a one-to-one corresponding servo motor and servo controller. The servo controller is connected to the corresponding servo motor. At the same time, the reading head is connected to the corresponding servo controller through a third-party protocol. The servo controller collects data from the reading head in real time and feeds it back to the external position positioning loop of the servo controller as the data of the external positioning sensor to realize the precise positioning of the motor in the magnetic scale data. The control center and all servo controllers are physically connected through RS485 to realize one-to-many master-slave communication, and the position data of the reading head as an external sensor can be continuously read. This data can be used in the control center to calculate the position of the moving part to realize position tracking based on the deformation of the flexible material and one-key position reproduction when starting up. At the same time, even if the moving parts move when the power is off, because the servo motor adopts the absolute position positioning mode while the reading head adopts the relative position positioning mode (or the servo motor adopts the incremental pulse encoding mode while the reading head adopts the absolute position positioning mode), the servo motor controller immediately reads the current position of the reading head in the magnetic scale when the power is on, and the data of the power-off movement will not be lost. In addition, multiple reading heads read data in the same magnetic scale, and there will be no system errors such as inaccurate installation position introduced by reading data separately by multiple magnetic scales, which improves the accuracy of the read position.

[0093] Furthermore, information is transmitted between any servo controller and the control center through the MODBUS communication protocol; information is transmitted between any servo controller and its corresponding reading head through third-party protocol communication or by counting pulses.

[0094] Of course, the module position detection component can be replaced by a device or component such as a grating ruler or a magnetostrictive position sensor that can detect the position of the hot knife module 10 in real time.

[0095] Optionally, the flexible material bag making machine 1 further comprises a first photoelectric scanning and a second photoelectric scanning mounted on the frame, wherein the first photoelectric scanning is located at the discharge side of the hot knife assembly, specifically between the puncher and the hot knife assembly, and the second photoelectric scanning is located at the feed side of the hot knife assembly, specifically between the hot knife assembly and the floating roller. Figure 3 shown.

[0096] The first photoelectric scanning and the second photoelectric scanning both include a photoelectric sensor 21 and a photoelectric bracket, and the photoelectric sensor 21 is mounted on the frame through the photoelectric bracket. Optionally, the first photoelectric scanning and the second photoelectric scanning are also moving parts. Further, a scanning motor is used to drive the photoelectric sensor 21 to search and move within a small range when the photoelectric bracket is fixed, so that it searches for and locates the color mark on the flexible material.

[0097] In actual application scenarios, when the photoelectric bracket is fixed and the front and rear tractions stop pulling the flexible material, the search end of the photoelectric sensor 21 faces the composite film, and then the scanning motor drives the photoelectric sensor 21 to search for and locate the color mark in a small range.

[0098] Optionally, the first scanning photoelectric device 20 and the second scanning photoelectric device 30 can also be used as moving parts, and the lead screw can be driven by a servo motor to move forward and backward on the linear guide rail as needed.

[0099] Optionally, along the feeding direction of the bag making machine 1, except for the first hot knife module 10, the feeding sides of the remaining hot knife modules 10 are fixedly connected with an infrared camera module 40 for detecting the hot mark image of the flexible material after being hot-pressed by the previous hot knife module 10, and sending it to the control center.

[0100] Furthermore, the moving mechanism of each moving part is composed of a servo motor, a reducer, a bidirectional left-right rotating cross helical gear and a rack to ensure the accuracy of the transverse sealing assembly.

[0101] This embodiment provides a composite film bag making machine 1 that provides a structural basis for achieving precise positioning of the hot knife assembly and real-time positioning of the hot knife assembly based on the deformation of the flexible material, thereby improving the quality of the finished flexible material product and reducing the waste of raw materials.

[0102] Example 3

[0103] This embodiment provides a method for positioning a transverse sealing ironing knife of a flexible material bag making machine 1. The method is implemented based on the flexible material bag making machine 1 equipped with a first scanning photoelectric device 20 and a second scanning photoelectric device 30 in the second embodiment, that is, the position deviation detection component includes: a first scanning photoelectric device 20 located at the discharge side of the ironing knife component and a second scanning photoelectric device 30 located at the feed side of the ironing knife component. The method includes:

[0104] S11, the control center obtains the target position corresponding to each hot knife module 10 according to the first color mark position information detected by the first scanning photoelectric 20 and the second color mark position information detected by the second scanning photoelectric 30, and the hot knife position proportional coefficient pre-calibrated by each hot knife module 10;

[0105] The control center obtains the first position deviation value corresponding to each hot knife module 10 according to the target position corresponding to each hot knife module 10 and the current first position information of each hot knife module 10 detected by the module position detection component;

[0106] The deviation information includes the first color mark position information and the second color mark position information;

[0107] The first color mark position information and the second color mark position information are both position information of a color mark pre-set on the flexible material within the detection area detected by the scanning photoelectric detection;

[0108] At this time, the first position deviation value includes the distance and direction of the deviation between the first position information corresponding to the ironing knife module 10 and the target position;

[0109] S12, the control center generates a first position adjustment instruction corresponding to each hot knife module 10 according to the first position deviation value corresponding to each hot knife module 10 and sends it to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received first position adjustment instruction.

[0110] Among them, the first scanning photoelectric 20 and the second scanning photoelectric 30 both use the photoelectric sensor 21 to scan whether there is a color mark passing through the corresponding range. If there is a valid signal, it means that the color mark is before or after the stop position. The scanning motor is started to drive the photoelectric sensor 21 to search at a certain speed, and the scanning length is fed back to the control center to calculate the search distance, that is, the relative position of the color mark on the flexible material. At the same time, the scanning motor returns to the original position.

[0111] In this embodiment, the first color mark position information and the second color mark position information are respectively obtained by the first scanning photoelectric device 20 and the second scanning photoelectric device 30, and the first position deviation value between the current position of each hot knife module 10 and the target position is obtained through the pre-calibrated hot knife position proportional coefficient corresponding to each hot knife module 10 and the current first position information of each hot knife module 10 detected by the module position detection component, that is, the distance and direction of the deviation between the first position information corresponding to the hot knife module 10 and the target position, and the first position deviation value is used to complete the precise positioning of the hot knife module 10 according to the deformation of the flexible material, thereby improving the quality of the finished product and reducing the waste of raw materials.

[0112] Furthermore, the ironing knife position proportional coefficient is determined by the ironing knife module 10 based on a pre-calibrated accurate position, and each ironing knife module 10 is adjusted according to the deformation amount of the flexible material.

[0113] That is, before S11, it also includes:

[0114] When the control center receives the position calibration command input by the user (i.e. after the manual inspection of the machine material, after determining that all the hot knife modules 10 are in the corresponding calibration position), the control center detects and records the third color mark position information detected by the current first scanning photoelectric 20 and the fourth color mark position information detected by the second scanning photoelectric 30, as well as the third position information of each hot knife module 10 detected by the module position detection component;

[0115] The control center obtains the ironing knife position proportional coefficient corresponding to each ironing knife module 10 according to the third color mark position information, the fourth color mark position information and the third position information of each current ironing knife module 10 detected by the module position detection component, and the preset formula 2; the formula 2 is:

[0116]

[0117] Among them, S 10 is the third color mark position information, S 20 is the fourth color mark position information, H 10 is the current third position information of each ironing knife module 10 detected by the module position detection mechanism, and K1 is the ironing knife position proportional coefficient corresponding to each ironing knife module 10.

[0118] Specifically, after manually adjusting the position of each ironing knife module 10, the position data of the color mark detected by the first scanning photoelectric 20 and the second scanning photoelectric 30 are read simultaneously, that is, the third color mark position information S 10 and the fourth color mark position information S 20 , and read the position information in each servo motor controller, that is, the third position information H 10 , then the ironing knife position proportional coefficient corresponding to each ironing knife module 10 can be obtained through formula 2.

[0119] During the operation of the bag making machine 1, each time a finished product is made, the color mark positions of the first scanning photoelectric 20 and the second scanning photoelectric 30 are read in real time, recorded as S11 and S21, and the target position of each hot knife module 10 can be calculated by the corresponding hot knife position proportional coefficient, and then the current first position information of each hot knife module 10 detected by the module position detection component is used to obtain the position deviation value of each hot knife module 10 that determines the distance and direction of the servo motor operation; specifically including:

[0120] The control center obtains the target position corresponding to each hot knife module 10 according to the first color mark position information detected by the first scanning photoelectric 20, the second color mark position information detected by the second scanning photoelectric 30, the pre-calibrated hot knife position proportional coefficient of each hot knife module 10, and the pre-set formula 1; the formula 1 is:

[0121] H s =S 11 +K1(S 21 -S 11 );

[0122] Among them, H s is the target position corresponding to each hot knife module 10, S 11 is the first color mark position information, S 21 is the second color mark position information, K1 is the pre-calibrated ironing knife position proportional coefficient of each ironing knife module 10;

[0123] The control center obtains the first position deviation value corresponding to each hot knife module 10 according to the target position corresponding to each hot knife module 10 and the current first position information of each hot knife module 10 detected by the module position detection component.

[0124] This embodiment obtains the ironing knife position proportional coefficient corresponding to each ironing knife by pre-calibrating the position of each ironing knife module 10, and then completes the precise positioning of each ironing knife module 10 through the real-time acquisition of the color mark positions detected by the first scanning photoelectric 20 and the second scanning photoelectric 30, thereby achieving real-time and precise adjustment of the position of the ironing knife module 10 according to the deformation amount of the flexible material, thereby improving the quality of the finished product and reducing the waste of raw materials.

[0125] Furthermore, the present embodiment can also realize automatic adjustment of the position of the hot knife module 10 when the bag making machine 1 is turned on, that is, before S11, it also includes:

[0126] When the control center receives the one-key cutter arrangement command of the bag making machine 1 input by the user, the desired position information of each hot cutter module 10 is generated according to the pre-set flexible material information;

[0127] The flexible material information includes the length information of the flexible material, the standard position information of the color mark on the flexible material and the process requirements;

[0128] The control center determines whether there is a deviation between the current position of each hot knife module 10 and the expected position according to the expected position information of each hot knife module 10 and the current second position information of each hot knife module 10 detected by the module position detection mechanism;

[0129] If it exists, the second position deviation value corresponding to each hot knife module 10 is obtained according to the second position information and the expected position information of the hot knife module 10;

[0130] The control center generates a second position adjustment instruction corresponding to each hot knife module 10 according to the second position deviation value corresponding to each hot knife module 10 and sends the second position adjustment instruction to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received second position adjustment instruction;

[0131] The second position deviation value includes the distance and direction of the second position information corresponding to the ironing knife module 10 and the expected position deviation. Specifically:

[0132] The control center will set up a product formula library, and when receiving flexible material information, it will traverse the product formula library to see whether there is expected position information corresponding to the flexible material information;

[0133] If there is expected position information corresponding to the flexible material information, the control center determines whether there is a deviation between the current position of each hot knife module 10 and the expected position according to the current second position information of each hot knife module 10 detected by the expected position information detection mechanism;

[0134] When there is a deviation, the second position deviation value corresponding to each hot knife module 10 is obtained according to the second position information and the expected position information of the hot knife module 10;

[0135] The control center generates a second position adjustment instruction corresponding to each hot knife module 10 according to the second position deviation value corresponding to each hot knife module 10 and sends it to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received second position adjustment instruction.

[0136] When there is no expected position information corresponding to the flexible material information, the control center generates a third position adjustment instruction corresponding to each hot knife module 10 based on the received second position information of the current hot knife module 10 and the flexible material information, so that the hot knife module 10 adjusts its own position according to the received third position adjustment instruction; when all the hot knife modules 10 complete the position adjustment, the control center receives the current fourth position information of each hot knife module 10 detected by the module position detection component, and saves the fourth position information and the flexible material information as a group of information to the product formula library.

[0137] By establishing a product formula library, a memory function is provided for the bag making machine 1. When changing product specifications, the memory position in the product formula library can be directly retrieved and compared with the current position, and the servo motor is driven to move the hot knife module 10 to the corresponding position, realizing one-key positioning, reducing the waste of raw materials for adjusting the machine during manual positioning, and reducing the consumption of human resources during the adjustment and positioning process, saving manpower and material resources.

[0138] Example 4

[0139] The present embodiment provides a method for positioning a transverse sealing hot knife of a flexible material bag making machine 1. The method is implemented based on the flexible material bag making machine 1 provided with an infrared camera module 40 in the second embodiment, that is, the hot knife assembly includes n hot knife modules 10; the position deviation detection assembly includes n-1 infrared camera modules 40; n is a positive integer greater than or equal to 2; along the direction from the feed port to the discharge port of the bag making machine 1, except for the first hot knife module 10, the remaining hot knife modules 10 are all fixedly connected to an infrared camera module 40, and each infrared camera module 40 is used to collect the hot mark temperature difference image of the flexible material at the feed port of the hot knife module 10 fixedly connected thereto; each of the hot mark temperature difference images is an image of the flexible material after being hot pressed by the hot knife module 10 before the infrared camera module 40 that collects the image;

[0140] The method then comprises:

[0141] The control center obtains the burn mark image detected by each infrared camera at a preset time; the preset time is one action step of the bag making machine 1;

[0142] When the control center receives the temperature difference image of the burn mark detected by any infrared camera, the position information of the high temperature area in the temperature difference image of the burn mark is obtained according to the preset edge detection algorithm, and the first position deviation value corresponding to the hot knife module 10 fixedly connected to the infrared camera module 40 is obtained according to the position information of the high temperature area in the temperature difference image of the burn mark and the first position information corresponding to the hot knife module 10 fixedly connected to the infrared camera module 40 detected by the module position detection component.

[0143] The control center generates a first position adjustment instruction corresponding to each hot knife module 10 according to the first position deviation value corresponding to each hot knife module 10 and sends it to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received first position adjustment instruction. Specifically including:

[0144] The infrared camera module 40 is used to take pictures, and the control center reads the temperature difference image of the scald mark taken by the infrared camera module 40, that is, the temperature data, and calculates the position of the scald mark. Figure 4As shown, the infrared camera module 40 is used to align the seal of the flexible material. According to the collected image, the red strip in the middle is the seal of the flexible material, where the temperature is the highest and the relative temperature difference is not much different. The temperature gradually decreases from the middle to the upper and lower sides, and the color presented changes from red to purple (rainbow color). According to the temperature distribution data of the hot mark temperature difference image, the edge detection algorithm is used to calculate and take the second derivative in the Y-axis direction, and the dividing lines of the two Y-axis directions can be calculated. The high-temperature area, that is, the position of the high-temperature area can be calculated, and the data of the center position can be used as the hot pressing position of the previous hot knife module 10, and can also be used as the target position for tracking the next hot knife module 10 on the assembly line of the bag making machine 1, so as to complete the tracking of the hot knife module 10.

[0145] like Figure 5 As shown, the infrared camera module 40 is fixed to the ironing knife module 10 through the camera bracket 41, and can move forward and backward relative to the ironing knife body to adjust the position of the camera so that when the flexible material stops pulling, the upper camera can face the seal of the flexible material, which is convenient for collecting a complete image. On the production line, the first ironing knife module 10 that is pressed does not need to be installed with the infrared camera module 40. Each subsequent ironing knife module 10 is installed with a camera to photograph the ironing mark after the previous ironing knife module 10 is pressed. The deviation value between the target position and the current position of the ironing knife is used to control the moving distance and direction of the servo motor so that the ironing edges of the front and rear ironing knives overlap, achieving the effect of ironing edge tracking.

[0146] Among them, edge detection algorithm is a technology in image processing, which aims to identify and locate areas in the image where the brightness (temperature) changes significantly. These changes usually appear as sharp changes in intensity, color or texture, usually corresponding to the boundaries or contours of objects. By detecting this edge information, edge detection can help extract the structural features of the image and facilitate image analysis and processing.

[0147] Furthermore, when the control center receives the scald temperature difference image sent by any infrared camera module 40, the scald temperature difference image is normalized, that is, converted to the range of [0, 255], and the calculation formula is as follows:

[0148]

[0149] Among them, y is the value after normalization mapping, x is the value of any pixel position in the current data, and x min is the minimum value of the target data, x max This is the current maximum value of the data.

[0150] The image pixel value is the value assigned by the computer when the original image is digitized, representing the average temperature information of a small block of the original image.

[0151] A fuzzy mathematics-based method is used to automatically remove the background noise of the normalized scald temperature difference image, and the scald temperature difference image is divided into a background area and a target area (the area where the edge needs to be detected). The target area is automatically extracted according to the maximum membership principle in fuzzy mathematics.

[0152] Fuzzy mathematics is a mathematical method for dealing with ambiguity and uncertainty. It allows the existence of elements that partially belong to or do not belong to a set, which is different from traditional set theory, which only allows elements to completely belong to or not belong to a set. The core concept of fuzzy mathematics is fuzzy sets, which describe the degree to which an element belongs to a set through a membership function. This degree can be any real number between 0 and 1, not just 0 or 1.

[0153] Use median filtering and Gaussian smoothing filtering to remove random noise. Median filtering is a nonlinear signal processing technology based on sorting statistics theory that can effectively suppress noise. The basic principle of median filtering is to replace the value of a point in a digital image or digital sequence with the median value of each point in a neighborhood of the point, so that the surrounding pixel values ​​are close to the true value, thereby eliminating isolated noise points. The method is to use a two-dimensional sliding template with a certain structure to sort the pixels in the board according to the size of the pixel value to generate a monotonically rising (or falling) two-dimensional data sequence; Gaussian smoothing filtering is a linear smoothing filter that is suitable for eliminating Gaussian noise and is widely used in the noise reduction process of image processing.

[0154] Automatic threshold selection based on maximum entropy first calculates the gradients in the width and height directions of each pixel after the above filtering to obtain the corresponding gradient amplitude image. The grids in the gradient image are annotated using the pre-set non-maximum suppression method. The maximum entropy is calculated based on the gradient amplitude image and the annotated image to obtain the optimal threshold.

[0155] The Canny edge detection algorithm is used to track edges and obtain continuous edges. The extreme points in the gradient amplitude image whose pixel values ​​are greater than the optimal high threshold are edge points. The pixels marked as extreme points in the eight neighborhoods around each edge point are searched, and the points whose pixel values ​​are greater than the low threshold are marked as edge points. The Canny edge detection algorithm is divided into applying Gaussian filtering to smooth the image in order to remove noise; finding the intensity gradient of the image; applying non-maximum suppression technology to eliminate edge errors; applying double thresholds to determine possible boundaries; and using hysteresis technology to track boundaries.

[0156] For each edge point, take a 3×3 area centered on the edge point and calculate the total number of edge points in this area. If the total number is 1, the edge point is an isolated noise point and is immediately removed. Repeat the above process to obtain the final edge image to obtain the edge position, that is, the position information of the high-temperature area in the heat mark temperature difference image.

[0157] The control center obtains the target position of the ironing knife module 10 based on the edge position and the preset position parameters of the ironing knife module 10 to which the infrared camera module 40 is fixedly connected.

[0158] The first position deviation value corresponding to the hot knife module 10 fixedly connected to the infrared camera is obtained through the target position of the hot knife module 10 and the current first position information of the hot knife module 10 detected by the module position detection component. The control center generates a first position adjustment instruction corresponding to each hot knife module 10 according to the first position deviation value corresponding to each hot knife module 10 and sends it to the corresponding hot knife module 10, so that the hot knife module 10 adjusts its own position according to the received first position adjustment instruction.

[0159] This embodiment uses the image of the iron mark after ironing by the previous ironing knife module 10 to locate the target position of the next ironing knife, which can realize the real-time positioning of the iron mark during the operation of the bag making machine 1, eliminate the error caused by the deformation of the flexible material, reduce the waste of raw materials for adjusting the machine during manual positioning, and reduce the consumption of human resources during the adjustment and positioning process, saving manpower and material resources.

[0160] Example 5

[0161] This embodiment also provides an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus.

[0162] Memory, used to store computer programs;

[0163] The processor is used to implement the method for positioning the transverse sealing knife of the flexible material bag making machine 1 described in any one of the above embodiments when executing the program stored in the memory.

[0164] The communication bus mentioned in the above terminal can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0165] The communication interface is used for communication between the above terminal and other devices.

[0166] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0167] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0168] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature 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.

[0169] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection 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.

[0170] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0171] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0172] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for positioning a transverse sealing knife of a flexible material bag making machine, characterized in that: The method is implemented based on a flexible material bag making machine, the bag making machine includes a module position detection component, a position deviation detection component and a hot knife component; the method includes: S11, the control center generates a first position deviation value corresponding to each hot knife module according to the deviation information detected by the position deviation detection component and the current first position information of each hot knife module detected by the module position detection component; The deviation information is information reflecting the deformation amount of the flexible material; S12, the control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends the first position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received first position adjustment instruction; The ironing knife assembly includes at least one ironing knife module.

2. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 1, characterized in that: The position deviation detection component includes: a first scanning photoelectric device located at the discharge side of the ironing knife component and a second scanning photoelectric device located at the feed side of the ironing knife component; The S11 includes: The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric and the second color mark position information detected by the second scanning photoelectric, and the hot knife position proportional coefficient pre-calibrated by each hot knife module; The control center obtains the first position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the current first position information of each hot knife module detected by the module position detection component; The deviation information includes the first color mark position information and the second color mark position information; The first color mark position information and the second color mark position information are both position information of a color mark pre-set on the flexible material within the detection area detected by the scanning photoelectric detection; At this time, the first position deviation value includes the distance and direction of the deviation between the first position information corresponding to the hot knife module and the target position; The S12 includes: The control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends it to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received first position adjustment instruction.

3. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 2, characterized in that: The S11 includes: The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric, the second color mark position information detected by the second scanning photoelectric, the pre-calibrated hot knife position proportional coefficient of each hot knife module, and the pre-set formula 1; the formula 1 is: H s =S 11 +K1(S 21 -S 11 ); Among them, H s is the target position corresponding to each hot knife module, S 11 is the first color mark position information, S 21 is the second color mark position information, K1 is the ironing knife position proportional coefficient pre-calibrated for each ironing knife module; The control center obtains the position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the current first position information of each hot knife module detected by the module position detection component.

4. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 1, characterized in that: The S11 and before also include: S01. When the control center receives a one-key cutter arrangement instruction for the bag making machine input by the user, the control center generates the expected position information of each hot cutter module according to the pre-set flexible material information; The flexible material information includes the length information of the flexible material, the standard position information of the color mark on the flexible material and the process requirements; S02, the control center determines whether there is a deviation between the current position and the expected position of each hot knife module according to the expected position information of each hot knife module and the current second position information of each hot knife module detected by the module position detection mechanism; If it exists, the second position deviation value corresponding to each hot knife module is obtained according to the second position information and the expected position information of the hot knife module; S03, the control center generates a second position adjustment instruction corresponding to each hot knife module according to the second position deviation value corresponding to each hot knife module and sends the second position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received second position adjustment instruction; The second position deviation value includes the distance and direction of the deviation between the second position information corresponding to the hot knife module and the expected position.

5. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 2, characterized in that: The S11 and before also include: S01. When the control center receives a one-key cutter arrangement instruction for the bag making machine input by the user, the control center generates the expected position information of each hot cutter module according to the pre-set flexible material information; The flexible material information includes the length information, color mark position information and process requirements of the flexible material; S02, the control center determines whether there is a deviation between the current position and the expected position of each hot knife module according to the expected position information of each hot knife module and the current second position information of each hot knife module detected by the module position detection mechanism; If it exists, the second position deviation value corresponding to each hot knife module is obtained according to the second position information and the expected position information of the hot knife module; S03, the control center generates a second position adjustment instruction corresponding to each hot knife module according to the second position deviation value corresponding to each hot knife module and sends the second position adjustment instruction to the corresponding hot knife module, so that the hot knife module adjusts its own position according to the received second position adjustment instruction; The second position deviation value includes the distance and direction of the deviation between the second position information corresponding to the hot knife module and the expected position; S04, when the control center receives the position calibration instruction input by the user, the control center detects and records the third color mark position information detected by the first scanning photoelectric and the fourth color mark position information detected by the second scanning photoelectric, as well as the third position information of each hot knife module detected by the module position detection component; S05. The control center obtains the ironing knife position proportional coefficient corresponding to each ironing knife module according to the third color mark position information, the fourth color mark position information, the third position information of each current ironing knife module detected by the module position detection component, and the preset formula 2; the formula 2 is: Among them, S 10 is the third color mark position information, S 20 is the fourth color mark position information, H 10 is the current third position information of each hot knife module detected by the module position detection mechanism, and K1 is the hot knife position proportional coefficient corresponding to each hot knife module.

6. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 2, characterized in that: Each of the ironing knife modules comprises an ironing knife body, a servo controller and a servo motor for driving the ironing knife body to move linearly; The module position detection mechanism includes a magnetic scale and a reading head fixedly connected to the ironing knife body and corresponding to each other one by one; Then, the S11 includes: The control center obtains the target position corresponding to each hot knife module according to the first color mark position information detected by the first scanning photoelectric and the second color mark position information detected by the second scanning photoelectric, and the hot knife position proportional coefficient pre-calibrated by each hot knife module; The control center obtains a first position deviation value corresponding to each hot knife module according to the target position corresponding to each hot knife module and the received first position information detected by the servo controller of each hot knife module; The first position information is the relative position information of the reading head fixedly connected to the corresponding hot knife body on the magnetic scale received by the servo controller, that is, the position information of the hot knife body; The S12 includes: The control center generates a first position adjustment instruction corresponding to each hot knife module according to the first position deviation value corresponding to each hot knife module and sends the instruction to the corresponding servo controller; When any servo controller receives the first position adjustment instruction, it controls the corresponding servo motor to rotate according to the first position adjustment instruction, and further controls the corresponding ironing knife body to adjust its own position.

7. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 6, characterized in that: Information transmission is achieved between any of the servo controllers and the control center via the MODBUS communication protocol; Any of the servo controllers and its corresponding reading head communicate via a third-party protocol or transmit information by counting the number of pulses.

8. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 1, characterized in that: The ironing knife assembly includes n ironing knife modules; the position deviation detection assembly includes n-1 infrared camera modules; n is a positive integer greater than or equal to 2; Along the direction from the feeding port to the discharging port of the bag making machine, except for the first hot knife module, the remaining hot knife modules are fixedly connected to an infrared camera module, and each infrared camera module is used to collect the hot mark temperature difference image of the flexible material at the feeding port of the hot knife module fixedly connected thereto; Each of the heat mark temperature difference images is an image of the flexible material after being pressed by a heat knife module in front of the infrared camera module that collects the image; Then the S11 includes: The control center generates a first position deviation value corresponding to each hot knife module according to the hot mark temperature difference image detected by each infrared camera module and the current first position information of the hot knife module detected by the module position detection component; At this time, the first position deviation value is the distance and direction of the current first position information of any other hot knife module except the first hot knife module and the position deviation of the hot mark of the previous hot knife module; The deviation information includes a temperature difference image of a burn mark.

9. The method for positioning the transverse sealing knife of a flexible material bag making machine according to claim 8, characterized in that: The S11 includes: The control center obtains the burn mark image detected by each infrared camera at a preset time; the preset time is one action step of the bag making machine; When the control center receives the temperature difference image of the burn mark detected by any infrared camera, the position information of the high temperature area in the temperature difference image of the burn mark is obtained according to the preset edge detection algorithm, and the first position deviation value corresponding to the hot knife module fixedly connected to the infrared camera module is obtained according to the position information of the high temperature area in the temperature difference image of the burn mark and the first position information corresponding to the hot knife module fixedly connected to the infrared camera module detected by the module position detection component.

10. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; The memory is used to store computer programs; The processor is used to implement the transverse sealing knife positioning method of the flexible material bag making machine as described in any one of claims 1 to 9 when executing the program stored in the memory.

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