A control system for a three-face trimming machine

Abstract

The present application relates to the technical field of three-face book cutting machine, especially to a control system of three-face book cutting machine, comprising: a conveying module for directional conveying books to be cut to a cutting position; a cutting module arranged above the conveying module for cutting the books to be cut to output finished books; a detection module comprising a camera for collecting images of books to be cut and finished books, and a temperature sensor connected with a cutting knife for detecting air temperature of a cutting area in the cutting process; and a control module for determining falling speed of the cutting knife, judging precision of the cutting, and determining a cutting error response mode. The three-face book cutting machine automatically completes the cutting process, improves production efficiency and product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of three-sided book trimmers, and in particular to a control system of a three-sided book trimmer. Background Art

[0002] In the printing industry, in order to keep the length and width of a large number of printed books consistent, a three-sided book trimmer is usually used for cutting. There are some problems with existing three-sided book trimmers. For example, when the thickness of the book changes, the traditional three-sided book trimmer's book pressing mechanism often needs to stop and manually adjust the book pressing thickness. This method has little effect on large-scale production of the same specifications, but for small-batch, multi-variety digital printing production processes that require frequent changes in specifications, it will lead to low efficiency and high production costs. In addition, some three-sided book trimmers require workers to manually place books at certain time intervals when feeding. Long-term operation can easily cause fatigue to workers, thereby reducing work efficiency. In order to solve the above problems, the present invention has improved and innovated the existing technology. For example, a book pressing structure that does not require adjustment is developed, which can automatically adapt to books of different heights; an automatic book feeding mechanism is set to automatically place books at intervals to improve work efficiency; a new control system is adopted to improve the automation level of the book trimmer and reduce the intensity of manual work.

[0003] Chinese Patent Publication No.: CN111505998A discloses a reasonable saving control system for cutting welding gas, including a system control cabinet, a pressure stabilizing device and a gas intelligent distribution device. The welding gas passes through the system control cabinet, the pressure stabilizing device and the gas intelligent distribution device in sequence from the air inlet end and is connected to the user end; the system control cabinet includes a control cabinet body, a first main control board and a first control pipeline are arranged in the control cabinet body, a midstream pressure monitoring device and a midstream flow statistics device are arranged on the first control pipeline, an upstream pressure monitoring device and an upstream flow statistics device are arranged at the air inlet end of the first control pipeline, and the first control The outlet end of the pipeline is equipped with a downstream pressure monitoring device and a downstream flow counting device. The pressure stabilization device includes a second main control board and a pressure-stabilizing gas tank. The inlet end of the pressure-stabilizing gas tank is equipped with an inlet pressure monitoring device, and the outlet pipe of the pressure-stabilizing gas tank is equipped with an outlet pressure monitoring device. The pressure-stabilizing gas tank is connected to a second control pipe, and the second control pipe is equipped with a gas tank pressure monitoring device and a flow monitoring device. The gas intelligent distribution device includes a main box, which is equipped with a current sensor on the outside and a third main control board, a transformer, a first pressure monitoring device, a flow control device, and a proportional valve for controlling the proportional flow of gas. Therefore, the reasonable saving control system for cutting and welding gas is highly complex and has a slow response, which makes it difficult to achieve automated operation between system modules. Summary of the Invention

[0004] To this end, the present invention provides a control system for a three-sided book trimmer to overcome the problem in the prior art that the control system is highly complex and responds slowly, thereby making it impossible to achieve automated operations between system modules.

[0005] To achieve the above object, the present invention provides a control system for a three-sided book trimmer, comprising:

[0006] A conveying module, used for conveying the books to be cut to the cutting position in a direction, comprising a conveying track for conveying the books to be cut and a position restraining assembly provided on the conveying track for restraining the horizontal conveying position of the books to be cut;

[0007] The cutting module is arranged above the conveying module and is used for cutting the books to be cut to output finished books. The cutting module comprises a cutter arranged above the conveying track.

[0008] Furthermore, the conveying module also includes a conveying motor connected to the conveying track for providing power to the conveying track.

[0009] Furthermore, the cutting module further includes:

[0010] a cutting motor connected to the cutter to provide cutting power to the cutter;

[0011] A frequency converter is connected to the cutting motor and is used to control the cutting frequency of the cutter.

[0012] Furthermore, the position constraint component includes:

[0013] First mounting platform;

[0014] a support plate assembly connected to the first mounting platform and used to support the first mounting platform;

[0015] a first telescopic rod connected to the first mounting platform and used to control the compressed thickness of the book to be cut;

[0016] A limiting plate assembly is provided above the conveying track to fix the position of the books to be cut;

[0017] A sliding assembly connected to the limit plate assembly to control the sliding displacement of the limit plate assembly;

[0018] a book pressing plate connected to the first telescopic rod, which compresses the thickness of the book to be cut by pressing the upper surface of the book to be cut;

[0019] Among them, the support plate group includes a first support plate and a second support plate; the limit plate group includes a first positioning plate and a second positioning plate that are axially symmetrically arranged with the first telescopic rod as the axis of symmetry; the sliding assembly includes a sliding rail connected to the first mounting platform and a first fixing rod and a second fixing rod that are axially symmetrically arranged with the first telescopic rod as the axis of symmetry.

[0020] The present invention provides a control system for a three-sided book trimmer, further comprising:

[0021] Three-sided book trimmer;

[0022] a detection module, connected to the conveying module and the cutting module respectively, comprising a camera for capturing images of the books to be cut and the finished books, and a temperature sensor connected to the cutter for detecting the air temperature in the cutting area during the book cutting process;

[0023] a control module, connected to the conveying module, the cutting module, and the detection module, respectively, for initially adjusting the falling speed of the cutter according to the relative sliding displacement between the cutter and the book to be cut, determining the cutting accuracy according to the average difference between the size of the finished book and the standard size, and determining a cutting error response method based on the cutting accuracy determination result;

[0024] Among them, the cutting error response method includes secondary adjustment of the falling speed of the cutter, or, adjusting the stopping acceleration when the book to be cut is transported according to the actual cutting rate of the cutter, or adjusting the cutting frequency according to the temperature rise rate of the cutting area.

[0025] Furthermore, the control module is connected to the camera and the cutting motor respectively, and is used to initially adjust the falling speed of the cutter according to the relative sliding displacement between the cutter and the book to be cut captured by the camera;

[0026] The relative sliding displacement between the cutter and the book to be cut is the distance between the farthest point where the bottom book slides and the horizontal line where the projected cutter is located when cutting multiple books of the same specification.

[0027] Furthermore, the control module is connected to the camera and the cutting motor respectively, and is used to determine that the cutting accuracy does not meet the requirements when the average difference between the size of the finished book and the standard size is greater than a preset second average difference, and to perform a secondary adjustment on the falling speed of the cutter by adjusting the speed of the cutting motor.

[0028] Furthermore, the control module is connected to the conveying motor and the camera respectively, and is used to preliminarily determine that the degree of wear of the cutter does not meet the requirements when the average difference between the size of the finished book and the standard size is greater than a preset first average difference and less than or equal to a preset second average difference, and to perform a secondary determination of the degree of wear of the cutter based on the actual cutting rate of the cutter;

[0029] If the actual cutting speed of the cutter is greater than the preset cutting speed, it is determined that the wear degree of the cutter does not meet the requirements, and the deceleration acceleration of the conveying motor is adjusted to increase the stopping acceleration when conveying the books to be cut;

[0030] The stopping acceleration of the book to be cut during transportation is the change in deceleration speed per unit time from the rated transportation speed to zero transportation speed during transportation of the book to be cut from the position constraint component to the cutting module.

[0031] Furthermore, the control module is connected to the frequency converter and the temperature sensor, respectively, and is configured to preliminarily determine that the accuracy of image acquisition does not meet the requirements when the average difference between the size of the finished book and the standard size is less than or equal to a preset first average difference, and to perform a secondary determination of the accuracy of image acquisition based on the temperature increase rate of the cutting area;

[0032] If the temperature rise rate of the cutting area is greater than the preset temperature rise rate, it is determined that the accuracy of the image acquisition does not meet the requirements, and the cutting frequency of the cutter is reduced by adjusting the power supply frequency of the inverter.

[0033] Furthermore, the calculation formula for the average difference between the finished book size and the standard size is:

[0034]

[0035] Where n is the number of finished books, is the length of the n-th finished book, is the standard length of the book, is the width of the n-th finished book, is the standard width of the book, and n is a natural number greater than 0.

[0036] Compared with the prior art, the beneficial effects of the present invention are that, by setting a position constraint component, a conveying module, a cutting module, a storage box, a detection module and a control module, the present invention can control the position stability of the books to be cut during the conveying process, thereby reducing the cutting error caused by position deviation; by setting the conveying module and the position constraint component to work together, the directional and precise conveying of the books to be cut is achieved; the cutter in the cutting module is set to cut according to the characteristic parameters of the book, thereby meeting the diverse book specification requirements and improving the versatility and flexibility of the equipment; the storage box can improve the efficiency of outputting finished books to the storage box, improve the continuity of the entire automated production process, and reduce manual handling; the present invention achieves an improvement in the accuracy of book cutting through the collaborative work and intelligent control of each module.

[0037] Furthermore, the present invention overcomes the problem of slipping or position displacement of the books to be cut during the conveying process by providing a conveying module, thereby improving the stability of the transmission of the books to be cut; and further improves the accuracy of book cutting by providing a variable frequency speed regulator in the conveying module.

[0038] Furthermore, the present invention overcomes the situation where the book to be cut and the cutter slide relative to each other by setting a second average difference, optimizes the cutting process, and improves the cutting accuracy and efficiency; determines the cutting accuracy based on the average difference between the finished book size and the standard size, and determines the corresponding cutting error response method, effectively reducing the defective rate and improving product stability.

[0039] Furthermore, the present invention sets a preset cutting rate and increases the stopping acceleration when the book to be cut is conveyed according to the actual cutting rate of the cutter, thereby reducing the impact of the cutter's sharpness decreasing due to wear after cutting a large number of books or cutting books made of certain hard materials or thicker thicknesses, thereby improving the cutting accuracy.

[0040] Furthermore, the present invention sets the preset temperature rise rate and reduces the power supply frequency of the inverter according to the temperature rise rate of the cutting area, thereby overcoming the problem that the temperature rise caused by long-term operation of the book trimmer increases, thereby increasing the temperature rise rate of the cutting area, and then generating air flow movement, causing part of the book fins to float in the air and affecting the accuracy of image acquisition. The accuracy of image acquisition is improved, which helps the three-sided book trimmer to adapt to large-scale cutting needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the overall structure of the control system of the three-sided book trimmer according to an embodiment of the present invention;

[0042] Figure 2 This is a block diagram of the overall structure of the control system of the three-sided book trimmer according to an embodiment of the present invention;

[0043] Figure 3 This is a block diagram of the specific structure of the cutting module of the control system of the three-sided book trimmer according to an embodiment of the present invention;

[0044] Figure 4 This is an overall logic flow chart of the control system of the three-sided book trimmer according to an embodiment of the present invention;

[0045] Figure 5 Schematic diagram of the structure of the position constraint component of the control system of the three-sided book trimmer according to an embodiment of the present invention;

[0046] The figures are marked as follows: 1-camera, 2-position constraint assembly, 3-conveying track, 4-cutting motor, 5-cutter, 6-temperature sensor, 7-storage box, 8-frequency converter; 9-conveying motor, 10-workbench, 11-first positioning plate, 12-second positioning plate, 13-first telescopic rod, 14-book pressing board, 15-second fixed rod, 16-first fixed rod, 17-first support plate, 18-second support plate, 19-sliding track, 20-first mounting platform. DETAILED DESCRIPTION

[0047] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0048] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0049] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in this specification refers to the presence of features, integers, steps, operations, elements / components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements / components. It should be understood that when we say that a module is "connected" or "coupled" to another module, it can be directly connected or coupled to the other module, or there can be an intermediate unit. In addition, "connected" or "coupled" as used herein may include wireless connection or wireless coupling.

[0050] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5The figures are respectively a schematic diagram of the overall structure of the control system of the three-sided book trimmer according to an embodiment of the present invention, a block diagram of the overall structure, a block diagram of the structure of the cutting module, a flow chart of the overall logic, and a schematic diagram of the structure of the position constraint component. A control system of the three-sided book trimmer according to an embodiment of the present invention comprises:

[0051] A conveying module, for conveying the books to be cut to the cutting position in a direction, comprising a conveying track 3 for conveying the books to be cut and a position restraining assembly 2 provided on the conveying track 3 for restraining the horizontal conveying position of the books to be cut;

[0052] a cutting module, which is arranged above the conveying module and is used to cut the books to be cut to output finished books, and includes a cutter 5 arranged above the conveying track;

[0053] Specifically, a telescopic assembly for controlling the movement of the cutter 5 in the vertical direction is provided above the cutter 5 , including a push rod for connecting the cutting motor and the cutter 5 .

[0054] In practice, the present invention can control the position stability of the books to be cut during the conveying process through the position constraint component, the conveying module, the cutting module, the detection module and the control module, thereby reducing the cutting error caused by position deviation; by setting the conveying module and the position constraint component to work together, the directional and precise conveying of the books to be cut is achieved; the cutter 5 in the cutting module is set to cut according to the characteristic parameters of the book, which meets the diverse book specification requirements and improves the versatility and flexibility of the equipment; the storage box 7 can improve the efficiency of outputting the finished books to the storage box 7, improve the continuity of the entire automated production process, and reduce manual handling; the present invention achieves an improvement in the accuracy of book cutting through the collaborative work and intelligent control of each module.

[0055] Specifically, the conveying module further includes a conveying motor 9 connected to the conveying track 3 for providing power to the conveying track 3 .

[0056] In practice, the present invention overcomes the problem of slipping or position displacement of the books to be cut during the conveying process by setting up a conveying module, thereby improving the stability of the transmission of the books to be cut; and further improves the accuracy of book cutting by setting up a variable frequency speed regulator in the conveying module.

[0057] Specifically, the cutting module further includes:

[0058] a cutting motor 4 connected to the cutter 5 to provide cutting power for the cutter 5;

[0059] The frequency converter 8 is connected to the cutting motor 4 and is used to control the cutting frequency of the cutter 5 .

[0060] Specifically, the position constraint component 2 includes:

[0061] A first mounting platform 20;

[0062] a support plate assembly connected to the first mounting platform 20 and used to support the first mounting platform 20;

[0063] a first telescopic rod 13 connected to the first mounting platform 20 for controlling the compressed thickness of the book to be cut;

[0064] A limiting plate assembly is provided above the conveying track 3 to fix the position of the books to be cut;

[0065] A sliding assembly connected to the limit plate assembly to control the sliding displacement of the limit plate assembly;

[0066] a book pressing plate 14 connected to the first telescopic rod 13, which compresses the thickness of the book to be cut by pressing the upper surface of the book to be cut;

[0067] Among them, the support plate group includes a first support plate 17 and a second support plate 18; the limit plate group includes a first positioning plate 11 and a second positioning plate 12 that are axially symmetrically arranged with the first telescopic rod 13 as the axis of symmetry; the sliding assembly includes a sliding rail 19 connected to the first mounting platform 20 and a first fixing rod 16 and a second fixing rod 15 that are axially symmetrically arranged with the first telescopic rod 13 as the axis of symmetry.

[0068] An embodiment of the present invention provides a three-sided book trimmer control system, further comprising:

[0069] Three-sided book trimmer;

[0070] a detection module, which is connected to the conveying module and the cutting module respectively, and includes a camera 1 for capturing images of the books to be cut and the finished books, and a temperature sensor 6 connected to the cutter 5 for detecting the air temperature in the cutting area during the cutting process;

[0071] Among them, camera 1 is an industrial measurement camera;

[0072] a control module, connected to the conveying module, the cutting module, and the detection module, respectively, for initially adjusting the falling speed of the cutter according to the relative sliding displacement between the cutter and the book to be cut, determining the cutting accuracy according to the average difference between the size of the finished book and the standard size, and determining a cutting error response method based on the cutting accuracy determination result;

[0073] Among them, the cutting error response method includes secondary adjustment of the falling speed of the cutter, or, adjusting the stopping acceleration when the book to be cut is transported according to the actual cutting rate of the cutter, or adjusting the cutting frequency according to the temperature rise rate of the cutting area.

[0074] Specifically, the control module is connected to the camera 1 and the cutting motor 4 respectively, and is used to initially adjust the falling speed of the cutter 5 according to the relative sliding displacement between the cutter 5 and the book to be cut captured by the camera 1;

[0075] The step of initially adjusting the falling speed of the cutter 5 includes:

[0076] The possible values ​​of the falling speed of the cutter 5 are preliminarily determined to be 10 cm / s, 15 cm / s and 20 cm / s;

[0077] Cutting the book to be cut at the three cutter speeds mentioned above, and adjusting the value of the falling speed of the cutter 5 according to the relative sliding displacement between the cutter 5 and the book to be cut. If the relative sliding displacement of the book to be cut is greater than the preset displacement, it is determined that the falling speed of the cutter 5 does not meet the requirements, and the falling speed of the cutter 5 is reduced by reducing the speed of the cutting motor 4;

[0078] Optionally, the preset displacement value range may be [0.1 cm, 2 cm];

[0079] Preferably, the preferred embodiment of the preset displacement is 0.5 cm;

[0080] In one possible embodiment, the relative sliding displacement of the book to be cut is 1 cm, which is greater than the preset displacement. For every 0.1 cm that the relative sliding displacement of the book to be cut exceeds the preset displacement, the speed of the cutting motor 4 is reduced by 30 r / min compared to the current speed of the cutting motor 4. The current falling speed of the cutter 5 is 20 cm / s, and the speed of the cutting motor 4 is 3500 r / min. The reduced speed of the cutting motor 4 is 3500 r / min = [(1-0.5) / 0.1] × 30 r / min = 3350 r / min.

[0081] The relative sliding displacement between the cutter 5 and the book to be cut is the distance between the farthest point where the bottom book slides and the horizontal line where the projected cutter is located when cutting multiple books of the same specification.

[0082] Specifically, the control module is connected to the camera 1 and the cutting motor 4, respectively, and is used to determine that the cutting accuracy does not meet the requirements when the average difference between the size of the finished book and the standard size is greater than a preset second average difference, and to perform a secondary adjustment on the falling speed of the cutter 5;

[0083] Optionally, the preset value range of the second average difference may be [100mm 2 , 64mm 2 ];

[0084] Preferably, the second average difference is preset to be 80 mm. 2 ;

[0085] In a specific embodiment, the average difference between the finished book size and the standard size is 110 mm. 2 , is greater than the preset second average difference, the average difference between the finished book size and the standard size exceeds the preset second average difference by 2mm 2 , the speed of the cutting motor 4 is reduced by 10 r / min; the current speed of the cutting motor 4 is 2900 r / min, and the speed of the cutting motor 4 after reduction is 2900-10×(110-80) / 2=2750 r / min.

[0086] In practice, the present invention overcomes the situation where the book to be cut and the cutter 5 slide relative to each other by setting a second average difference, optimizes the cutting process, and improves the cutting accuracy and efficiency; determines the cutting accuracy based on the average difference between the finished book size and the standard size, and determines the corresponding cutting error response method, effectively reducing the defective rate and improving the stability of the product.

[0087] Specifically, the control module is connected to the conveying motor 9 and the camera 1, respectively, and is used to preliminarily determine that the wear degree of the cutter 5 does not meet the requirements when the average difference between the size of the finished book and the standard size is greater than a preset first average difference and less than or equal to a preset second average difference, and to perform a secondary determination of the wear degree of the cutter 5 based on the actual cutting speed of the cutter;

[0088] If the actual cutting rate of the cutter is greater than the preset cutting rate, it is determined that the wear degree of the cutter 5 does not meet the requirements, and the stopping acceleration of the conveying motor 9 is increased by adjusting the deceleration acceleration of the conveying motor 9;

[0089] The stopping acceleration of the book to be cut during transportation is the change in deceleration speed per unit time from the rated transportation speed to zero transportation speed during transportation of the book to be cut from the position constraint component 2 to the cutting module.

[0090] Optionally, the preset value range of the first average difference can be [64mm 2 , 36mm 2 ], the preset cutting rate range can be [6m / min, 7m / min];

[0091] Preferably, the preferred embodiment of the preset first average difference is 45mm 2 , the preferred embodiment of the preset cutting rate is 6.5m / min;

[0092] In a specific embodiment, the average difference between the finished book size and the standard size is 58 mm. 2 , is greater than the preset first average difference and less than the preset second average difference, and it is determined that the wear degree of the cutter 5 does not meet the requirements;

[0093] In a specific embodiment, the actual cutting rate of the cutter is 5.8 m / min. When the actual cutting rate of the cutter is 0.5 m / min lower than the preset cutting rate, the speed of the conveying motor 9 is reduced by 80 r / min compared to the current speed. When the actual cutting rate of the cutter is 0.5 m / min lower than the preset cutting rate, the speed of the conveying motor is reduced by 10 r / min for every 0.1 m / min lower the actual cutting rate. The current speed of the conveying motor 9 is 1400 r / min, and the reduced speed of the conveying motor 9 is 1400 r / min. The speed is calculated as follows: 1400 r / min-80-10 r / min×[(6.5 m / min-5.8 m / min-0.5 m / min) / 0.1 m / min]=1300 r / min.

[0094] In practice, the present invention sets a preset cutting rate and increases the stopping acceleration when the book to be cut is conveyed according to the actual cutting rate of the cutter, thereby reducing the impact of the cutter's sharpness decreasing due to wear after cutting a large number of books or cutting books made of certain hard materials or thicker thicknesses, thereby improving the cutting accuracy.

[0095] Specifically, the control module is connected to the frequency converter 8 and the temperature sensor 6, respectively, and is configured to preliminarily determine that the accuracy of image acquisition does not meet the requirements when the average difference between the size of the finished book and the standard size is less than or equal to a preset first average difference, and to perform a secondary determination of the accuracy of image acquisition based on the temperature increase rate of the cutting area;

[0096] If the temperature rise rate of the cutting area is greater than the preset temperature rise rate, it is determined that the accuracy of the image acquisition does not meet the requirements, and the cutting frequency of the cutter 5 is reduced by adjusting the power supply frequency of the inverter 8.

[0097] Optionally, the preset temperature increase rate may be in the range of [0.1°C / min, 1°C / min];

[0098] Preferably, the preferred embodiment of the preset temperature increase rate is 0.3°C / min;

[0099] In one or more specific embodiments, the average difference between the finished book size and the standard size is 30 mm. 2 , which is less than the preset first average difference, and it is determined that the accuracy of image acquisition does not meet the requirements. The temperature sensor 6 measures the temperature rise rate of the cutting area to be 0.7°C / min, which is greater than the preset temperature rise rate. For every 0.1°C / min that the temperature rise rate of the cutting area exceeds the preset temperature rise rate, the power supply frequency of the inverter 8 is reduced by 10Hz. The current power supply frequency of the inverter 8 is 300Hz. The reduced power supply frequency of the inverter 8 is: 300Hz-10Hz×(0.7°C / min-0.3°C / min) / 0.1°C / min=260Hz.

[0100] In practice, the present invention sets the preset temperature rise rate and reduces the power supply frequency of the inverter 8 according to the temperature rise rate of the cutting area, thereby overcoming the problem that the temperature rise caused by long-term operation of the book trimmer increases, thereby increasing the temperature rise rate of the cutting area, and then generating air flow movement, causing part of the book fins to float in the air and affecting the accuracy of image acquisition. The accuracy of image acquisition is improved, which helps the three-sided book trimmer to adapt to large-scale production needs.

[0101] Specifically, the calculation formula for the average difference between the finished book size and the standard size is:

[0102]

[0103] Among them, n is the number of finished books, A n is the length of the nth finished book, A S is the standard length of the book, B n is the width of the nth finished book, B S is the standard width of the book, and n is a natural number greater than 0.

[0104] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A control system for a three-sided book trimmer, characterized in that: include: A conveying module, used for conveying the books to be cut to the cutting position in a direction, comprising a conveying track for conveying the books to be cut and a position restraining assembly provided on the conveying track for restraining the horizontal conveying position of the books to be cut; a cutting module, which is arranged above the conveying module and is used to cut the books to be cut to output finished books, and includes a cutter arranged above the conveying track; a detection module, connected to the conveying module and the cutting module respectively, comprising a camera for capturing images of the books to be cut and the finished books, and a temperature sensor connected to the cutter for detecting the air temperature in the cutting area during the book cutting process; a control module, which is respectively connected to the conveying module, the cutting module and the detection module, and is used to initially adjust the falling speed of the cutter according to the relative sliding displacement between the cutter and the book to be cut, determine the cutting accuracy according to the average difference between the size of the finished book and the standard size, and determine the cutting error response method based on the cutting accuracy determination result; The relative sliding displacement between the cutter and the book to be cut is the distance between the farthest point where the bottom book slides and the horizontal line where the projected cutter is located, obtained by projecting the cutter onto the bottom book, when cutting multiple books of the same specification. Among them, the cutting error response method includes secondary adjustment of the falling speed of the cutter, or, adjusting the stopping acceleration when the book to be cut is transported according to the actual cutting rate of the cutter, or adjusting the cutting frequency according to the temperature rise rate of the cutting area.

2. The control system of the three-sided book trimmer according to claim 1, characterized in that: The conveying module further includes a conveying motor connected to the conveying track for providing power to the conveying track.

3. The control system of the three-sided book trimmer according to claim 2, characterized in that: The cutting module also includes: a cutting motor connected to the cutter to provide cutting power to the cutter; A frequency converter is connected to the cutting motor and is used to control the cutting frequency of the cutter.

4. The control system of the three-sided book trimmer according to claim 3, characterized in that: The position constraint component includes: First mounting platform; a support plate assembly connected to the first mounting platform and used to support the first mounting platform; a first telescopic rod connected to the first mounting platform and used to control the compressed thickness of the book to be cut; A limiting plate assembly is provided above the conveying track to fix the position of the books to be cut; A sliding assembly connected to the limit plate assembly to control the sliding displacement of the limit plate assembly; a book pressing plate connected to the first telescopic rod, which compresses the thickness of the book to be cut by pressing the upper surface of the book to be cut; Among them, the support plate group includes a first support plate and a second support plate; the limit plate group includes a first positioning plate and a second positioning plate that are axially symmetrically arranged with the first telescopic rod as the axis of symmetry; the sliding assembly includes a sliding rail connected to the first mounting platform and a first fixing rod and a second fixing rod that are axially symmetrically arranged with the first telescopic rod as the axis of symmetry.

5. The control system of the three-sided book trimmer according to claim 4, characterized in that: The control module is connected to the camera and the cutting motor respectively, and is used for initially adjusting the falling speed of the cutter according to the relative sliding displacement between the cutter and the book to be cut collected by the camera.

6. The control system of the three-sided book trimmer according to claim 5, characterized in that: The control module is connected to the camera and the cutting motor respectively, and is used to determine that the cutting accuracy does not meet the requirements when the average difference between the finished book size and the standard size is greater than a preset second average difference, and to perform a secondary adjustment on the falling speed of the cutter by adjusting the speed of the cutting motor.

7. The control system of the three-sided book trimmer according to claim 6, characterized in that: The control module is connected to the conveying motor and the camera, respectively, and is configured to preliminarily determine that the degree of wear of the cutter does not meet the requirements when the average difference between the size of the finished book and the standard size is greater than a preset first average difference and less than or equal to a preset second average difference, and to perform a secondary determination of the degree of wear of the cutter based on the actual cutting speed of the cutter; If the actual cutting speed of the cutter is greater than the preset cutting speed, it is determined that the wear degree of the cutter does not meet the requirements, and the deceleration acceleration of the conveying motor is adjusted to increase the stopping acceleration when conveying the books to be cut; The stopping acceleration of the book to be cut during transportation is the change in deceleration speed per unit time from the rated transportation speed to zero transportation speed during transportation of the book to be cut from the position constraint component to the cutting module.

8. The control system of the three-sided book trimmer according to claim 7, characterized in that: The control module is connected to the frequency converter and the temperature sensor, respectively, and is configured to preliminarily determine that the accuracy of image acquisition does not meet the requirements when the average difference between the size of the finished book and the standard size is less than or equal to a preset first average difference, and to perform a secondary determination of the accuracy of image acquisition based on the temperature increase rate of the cutting area; If the temperature rise rate of the cutting area is greater than the preset temperature rise rate, it is determined that the accuracy of the image acquisition does not meet the requirements, and the cutting frequency of the cutter is reduced by adjusting the power supply frequency of the inverter.

9. The control system of the three-sided book trimmer according to claim 8, characterized in that: The calculation formula for the average difference between the finished book size and the standard size is: Among them, n is the number of finished books, A n is the length of the nth finished book, A S is the standard length of the book, B n is the width of the nth finished book, B S is the standard width of the book, and n is a natural number greater than 0.

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