Adaptive trim-to-pressure line control method and control device

Abstract

This application provides an adaptive cutting and crease control method and apparatus. The method includes the following steps: acquiring the size information of a packaging box; based on the size information, obtaining the cutting size Lx of the sheet along a first direction and the position information of each transverse crease along the first direction, wherein the transverse crease is perpendicular to the first direction; acquiring the initial position and the rotation angle ΔR of the working position of each crease knife, and the distance ΔD between the crease knife and the cutting knife along the first direction at each working position, wherein the working position is the position where the crease knife applies pressure to the raw material to form a transverse crease; based on the cutting size Lx, the position information of the transverse crease, the rotation angle ΔR of each crease knife, and the distance ΔD, planning an electronic cam curve for each crease axis, wherein the main axis of the electronic cam curve is the traction axis, and the slave axis is the crease axis; and driving each crease roller drive device drives the crease roller to rotate to form a transverse crease based on the electronic cam curve of the crease roller.

Description

Technical Field

[0001] This application relates to the field of sheet cutting and creasing, and more particularly to an adaptive cutting and creasing control method and control device. Background Technology

[0002] With the advent of online shopping, people's purchasing power has increased, and e-commerce platforms need to package purchased goods in cardboard boxes, leading to a growing demand for cardboard boxes. Cardboard boxes are made from cardboard through processes such as cutting, creasing, grooving, gluing, and forming. The creasing process mostly involves using mechanical cams to press the cardboard, making it easier to form boxes with the marks. However, using mechanical cams to creasing cardboard of different sizes inevitably increases the complexity of mechanical design and makes debugging cumbersome. Summary of the Invention

[0003] In view of this, this application provides an adaptive cutting and creasing control method and control device to at least partially solve the above-mentioned problems.

[0004] In a first aspect, this application provides an adaptive cutting and creasing control method for a sheet cutting and creasing device. The sheet cutting and creasing device includes, in sequence along a first direction, a cutting blade and N creasing rollers, each creasing roller having a creasing blade arranged on its surface. The sheet cutting and creasing device also includes a traction roller, where N ≥ 1. The first direction is the direction in which the sheet travels. The adaptive creasing control method includes the following steps:

[0005] Obtain the dimensions of the packaging box;

[0006] Based on the size information, the cutting size Lx of the sheet along the first direction and the position information of each transverse pressing line along the first direction are obtained, wherein the transverse pressing line is perpendicular to the first direction;

[0007] Obtain the initial position and the rotation angle △R of each indentation knife at the working position, as well as the distance △D between the indentation knife and the cutting knife at each working position along the first direction, wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line;

[0008] Based on the cutting size Lx, the position information of the horizontal pressing line, the rotation angle △R and the spacing △D of each indentation knife, the electronic cam curve of each indentation axis is planned, wherein the main axis of the electronic cam curve is the traction axis and the slave axis is the indentation axis;

[0009] Each indentation roller drive unit drives the indentation roller to rotate based on the electronic cam curve of the indentation roller to form transverse indentation lines.

[0010] Optionally, the master axis of the electronic cam curve of each indentation roller is a linear axis, and the slave axis is a rotational axis; and,

[0011] The sheet cutting and creasing device includes, along the first direction, a second creasing roller and a first creasing roller, and the sheet material for forming the packaging box includes, along the first direction, a fourth transverse creasing line, a third transverse creasing line, a second transverse creasing line, and a first transverse creasing line; and

[0012] The spindle length of one cam cycle of the electronic cam curve of each creasing roller is equal to the sum of the cutting dimension Lx and the creasing blade spacing ΔD of the creasing roller, with a spindle length of 720°. The step of driving each creasing roller to rotate based on the electronic cam curve of the creasing roller to form a transverse crease further includes:

[0013] The first indentation roller drive device drives the first indentation roller to rotate 720° within one cam cycle to form the first transverse indentation line and the third transverse indentation line based on the electronic cam curve of the first indentation roller.

[0014] The second indentation roller drive device drives the second indentation roller to rotate 720° within one cam cycle based on the electronic cam curve of the second indentation roller to form the second transverse indentation line and the fourth transverse indentation line.

[0015] Optionally, the step of planning the electronic cam curve of each indentation axis based on the cutting size Lx, the position information of the transverse indentation line, the rotation angle ΔR of each indentation knife, and the spacing ΔD further includes:

[0016] The coordinates of the start point, end point, first control point, and second control point of the electronic cam curve of each indentation roller are obtained, wherein the first control point is used to characterize the first time the indentation tool reaches the working position within one cam cycle, and the second control point is used to characterize the second time the indentation tool reaches the working position within one cam cycle.

[0017] Based on the coordinates of the first control point, the starting coordinates and ending coordinates of the cam curve segment of the first synchronization zone are obtained, and based on the coordinates of the second control point, the starting coordinates and ending coordinates of the cam curve segment of the second synchronization zone are obtained. The linear speed of the indentation roller and the traction speed of the spindle in each synchronization zone are equal, and the first control point is the midpoint of the first synchronization zone and the second control point is the midpoint of the second synchronization zone.

[0018] The electronic cam curve for each indentation axis is obtained based on the coordinates of the starting point, the starting and ending coordinates of the first synchronization zone, the starting and ending coordinates of the second synchronization zone, and the coordinates of the ending point.

[0019] Optionally, the step of obtaining the start and end coordinates of the cam curve segment of the first synchronization zone based on the coordinates of the first control point, and obtaining the start and end coordinates of the cam curve segment of the second synchronization zone based on the coordinates of the second control point, further includes:

[0020] Set the synchronization distance A1 of the first synchronization zone and the synchronization distance A2 of the second synchronization zone, wherein the synchronization distance is used to characterize the spindle displacement of the main spindle in the synchronization zone or the rotation angle of the slave axis in the synchronization zone.

[0021] Based on the coordinates of the first control point and the synchronization distance A1 of the first synchronization zone, the starting coordinates and ending coordinates of the first synchronization zone are obtained. Based on the coordinates of the second control point and the synchronization distance A2 of the second synchronization zone, the starting coordinates and ending coordinates of the second synchronization zone are obtained.

[0022] Optionally, the step of obtaining the coordinates of the start point, end point, first control point, and second control point of the electronic cam curve of each indentation roller further includes:

[0023] Based on the rotation angle ΔR of each indentation roller, the ordinates of the first control point and the second control point of the electronic cam curve of the indentation roller are obtained;

[0024] Based on the position information of the transverse pressure line corresponding to each indentation roller and the spacing △D, the abscissas of the first and second control points of the electronic cam curve of the indentation roller are obtained.

[0025] Optionally, the step of planning the electronic cam curve of each indentation axis based on the cutting size Lx, the position information of the transverse indentation line, the rotation angle △R of each indentation knife, and the spacing △D further includes the following steps:

[0026] Based on the coordinates of the first control point and the second control point, plan the cam curve segment of the buffer zone, wherein the buffer zone is located between the first synchronization zone and the second synchronization zone, and the ordinate value of any point in the buffer zone is equal to 360°, which includes the following sub-steps:

[0027] Based on the coordinates of the first control point and the second control point, the x-coordinate of the midpoint of the buffer is obtained, wherein the distance between the midpoint of the buffer and the principal axis of the first control point is N1, and the distance between the midpoint and the principal axis of the second control point is N2, and N1 / N2 = 0.8~1.2;

[0028] Set the main axis displacement B of the buffer;

[0029] The starting point coordinates and ending point coordinates of the buffer are obtained based on the x-coordinate of the midpoint of the buffer and the principal axis displacement B of the buffer.

[0030] Based on the start and end coordinates of the buffer, the electronic cam curve segment of the buffer is obtained.

[0031] Optionally, the rotation angle ΔR is 180°; and / or the spindle displacement B of the buffer zone is 12-24 mm.

[0032] Optionally, the adaptive cutting and creasing control method further includes the following steps:

[0033] The process of conducting trial production based on the electronic cam curve and adjusting the electronic cam curve according to the results of the trial production includes the following sub-steps:

[0034] If the slave axis acceleration in the asynchronous zone of the electronic cam curve is greater than the acceleration threshold, then the synchronization distance is reduced;

[0035] If the sheet is stretched or the flatness of the sheet is greater than the flatness threshold, then determine whether the set mechanical parameters are accurate. If they are accurate, then increase the synchronization distance.

[0036] Optionally, the adaptive cutting and creasing control method further includes the following steps:

[0037] When the traction distance of the traction shaft is equal to an integer multiple of the cutting size Lx, the cutting blade moves to cut the sheet.

[0038] Secondly, this application provides an adaptive sheet cutting and creasing control device, wherein the adaptive sheet cutting and creasing device includes, in sequence along a first direction, a cutting blade and N creasing rollers, each creasing roller having a creasing blade arranged on its surface, and the sheet cutting and creasing device further includes a traction roller, where N≥1, and the first direction is the direction of sheet travel. The adaptive sheet cutting and creasing device includes:

[0039] The first acquisition module is used to acquire the size information of the packaging box;

[0040] The calculation module is used to obtain the cutting dimension Lx of the sheet along the first direction and the position information of each transverse pressure line along the first direction based on the size information, wherein the transverse pressure line is perpendicular to the first direction;

[0041] The second acquisition module is used to acquire the initial position and the rotation angle △R of the working position of each indentation knife, as well as the distance △D between the indentation knife and the cutting knife in the first direction at each working position, wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line.

[0042] The cam curve planning module is used to plan the electronic cam curve of each indentation axis based on the cutting size Lx, the position information of the horizontal indentation line, the rotation angle △R of each indentation knife, and the spacing △D, wherein the main axis of the electronic cam curve is the traction axis and the slave axis is the indentation axis;

[0043] A drive unit is used to drive the indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line at the indentation line position.

[0044] The adaptive cutting and creasing control scheme of this application can automatically plan different electronic cam curves based on the size information of the packaging box to suit various specifications of packaging boxes. The electronic cam has advantages such as flexible debugging and simple operation, avoiding the problems of complex design, difficult equipment maintenance, and high installation requirements of mechanical cams, thereby reducing the complexity of debugging and the difficulty of mechanical design. This adaptive cutting and creasing control scheme improves the adaptability of the equipment and meets the processing and manufacturing needs of packaging boxes of various sizes. The equipment automatically adjusts its size during operation, improving production efficiency and ease of use. Attached Figure Description

[0045] Figure 1 This is a flowchart of an adaptive cutting and creasing control method according to an exemplary embodiment of this application.

[0046] Figure 2 This is a schematic diagram of a cutting and creasing control device according to an exemplary embodiment of this application.

[0047] Figure 3 This is a schematic diagram of a sheet material used to form a packaging box, which is an exemplary embodiment of this application.

[0048] Figure 4 This is a control diagram of an adaptive cutting and creasing control method according to an exemplary embodiment of this application.

[0049] Figure 5 This is a schematic diagram of an electronic cam curve according to an exemplary embodiment of this application.

[0050] List of reference numerals in the attached diagram:

[0051] 10: Board material;

[0052] 20: Cutting axis;

[0053] 30: First indentation shaft (first indentation roller);

[0054] 40: Second indentation shaft (second indentation roller);

[0055] 51: Paper roller;

[0056] 52: Pressure roller;

[0057] 60: Packaging box;

[0058] 70: Board material used to form packaging boxes;

[0059] 71: First horizontal line;

[0060] 72: Second horizontal line;

[0061] 73: Third horizontal line;

[0062] 74: Fourth horizontal line;

[0063] 75: First end;

[0064] 76: Second end;

[0065] 80: Traction axle;

[0066] A1: First direction; Detailed Implementation

[0067] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0068] With the advent of online shopping, people's purchasing power has increased, and e-commerce platforms need to package purchased goods in cardboard boxes, leading to a growing demand for cardboard boxes. Cardboard boxes are made from cardboard through processes such as cutting, creasing, grooving, gluing, and forming. The creasing process mostly involves using mechanical cams to press the cardboard, making it easier to form boxes with the marks. However, using mechanical cams to creasing cardboard of different sizes inevitably increases the complexity of mechanical design and makes debugging cumbersome.

[0069] In view of this, this application provides an adaptive cutting and creasing control method and control device to at least partially solve the above-mentioned problems.

[0070] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Where there is no conflict between the embodiments, the following embodiments and features can be combined with each other. The steps in the following method embodiments are for illustrative purposes only and are not intended to limit the invention.

[0071] Adaptive cutting and crease control method

[0072] Figure 1This is a flowchart of an adaptive cutting and creasing control method 100 according to an exemplary embodiment of this application, used in a sheet cutting and creasing apparatus. The sheet cutting and creasing apparatus includes a traction roller for guiding the sheet along a first direction A1, a cutting blade (driven by a cutting shaft 20) for cutting the sheet, and creasing rollers (30, 40) for forming transverse creasing lines on the surface of the sheet. Figure 2 As shown, the sheet cutting and creasing device includes, along the first direction A1, a cutting blade (driven by the cutting shaft 20) and N creasing rollers (30, 40), each creasing roller (30, 40) having a creasing blade (not shown in the figure) arranged on its surface, where N ≥ 1. Figure 1 As shown, the method 100 in this embodiment mainly includes the following steps:

[0073] S101: Obtain the size information of the packaging box.

[0074] like Figure 3 As shown, the dimensions of the packaging box include at least the width b and the height c.

[0075] S102: Based on the size information of the packaging box, obtain the cutting dimension Lx of the sheet along the first direction A1 and the position information of each transverse pressure line along the first direction A1, such as... Figure 3 As shown, the horizontal pressure line is perpendicular to the first direction A1. Folding the sheet along the horizontal pressure line will yield a packaging box.

[0076] The position of each horizontal crease is related to the width b and height c of the packaging box. Figure 3 An exemplary diagram is shown, illustrating a packaging box and the sheet material used to form the packaging box. Figure 3 As shown, based on the height c of the packaging box, the thickness of the sheet material, and the manufacturing process, the distance c′ between the first horizontal pressure line 71 and the second horizontal pressure line 72, and the distance c″ between the third horizontal pressure line 73 and the fourth horizontal pressure line 74 can be obtained. Based on the width b of the packaging box, the thickness of the sheet material, and the manufacturing process, the distance b′ between the second horizontal pressure line 72 and the third horizontal pressure line 73, and the distance b″ between the fourth horizontal pressure line 74 and the second end 76 of the sheet material can be obtained. The distance L1 between the first horizontal pressure line 71 and the first end 75 of the sheet material is the size of the overlapping tongue of the packaging box, which is determined by the packaging box processing technology. The cutting size Lx of the sheet material is the sum of L1, c′, c″, b′, and b″. Therefore, based on the size information of the packaging box, the cutting size Lx of the sheet material along the first direction A1 and the position information of each horizontal pressure line along the first direction A1 can be obtained.

[0077] S103: Obtain the initial position and rotation angle △R of each indentation knife at the working position, and the distance △D between the indentation knife and the cutting knife at each working position along the first direction A1, wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line.

[0078] Each creasing roller has a creasing cutter arranged on its surface, parallel to the roller's axis. The position of the creasing cutter changes as the roller rotates. When the creasing cutter rotates to its working position, it applies pressure to the raw material to form a transverse crease.

[0079] In some embodiments, the rotation angle ΔR is 180°.

[0080] The distance between the creasing blade and the cutting blade in the working position of each creasing roller along the first direction A1 is ΔD. In this embodiment, the creasing blade in the working position coincides with the central axis of the creasing roller, so ΔD can be represented by the center distance between the creasing roller and the cutting axis 20 used to drive the cutting blade, such as... Figure 2 As shown, the distance between the first creasing roller 30 and the cutting shaft 20 along the first direction A1 is △D1, and the distance between the second creasing roller 40 and the cutting shaft 20 along the first direction A1 is △D2.

[0081] S104: Based on the cutting size Lx, the position information of the horizontal crease, the rotation angle △R of the crease knife, and the spacing △D, plan the electronic cam curve of each crease axis, where the main axis of the electronic cam curve is the traction axis and the slave axis is the crease axis.

[0082] In some embodiments, the master axis of the electronic cam curve of each indentation roller is a linear axis, and the slave axis is a rotary axis. Using a rotary axis for the slave axis can avoid the cumulative error of the slave axis due to long-term operation, which could lead to deviation of the cross-line.

[0083] In some embodiments, the sheet cutting and creasing device sequentially includes a second creasing roller 40 and a first creasing roller 30 along the first direction A1, such as Figure 2 As shown. The sheet material 70 used to form the packaging box includes, along the first direction A1, a fourth transverse pressure line 74, a third transverse pressure line 73, a second transverse pressure line 72, and a first transverse pressure line 71 in sequence. Figure 3 As shown. The main axis length of one cam cycle of the electronic cam curve of each creasing roller is equal to the sum of the cutting dimension Lx and the creasing blade spacing ΔD of the creasing roller, and the secondary axis length is 720°. The first creasing roller drive device drives the first creasing roller 30 to rotate 720° in one cam cycle based on the electronic cam curve of the first creasing roller to sequentially form the first transverse creasing line 71 and the third transverse creasing line 73, and the second creasing roller drive device drives the second creasing roller 40 to rotate 720° in one cam cycle based on the electronic cam curve of the second creasing roller to sequentially form the second transverse creasing line 72 and the fourth transverse creasing line 74.

[0084] Each indentation roller has an indentation knife on its surface. An electronic cam controls each roller to rotate two full rotations (720°) within one cam cycle, allowing the indentation knife to reach the working position twice to complete the processing of two transverse indentation lines. Most packaging boxes have four transverse indentation lines; by using two indentation rollers, all four lines can be processed within one cam cycle, significantly improving production efficiency.

[0085] Furthermore, in some embodiments, step S104 includes the following sub-steps:

[0086] S1041: Obtain the coordinates of the start point, end point, first control point C1, and second control point C2 of the electronic cam curve of each indentation roller, wherein the first control point C1 is used to characterize the first time the indentation tool reaches the working position within one cam cycle, and the second control point C2 is used to characterize the second time the indentation tool reaches the working position within one cam cycle.

[0087] In some embodiments, step S1041 includes the following sub-steps:

[0088] S10411: Based on the rotation angle △R of each indentation roller, obtain the ordinates of the first control point and the second control point of the electronic cam curve of the indentation roller;

[0089] Let the initial angle of the indentation tool be R0. Then, within one cam cycle, the distance the indentation tool travels from the axis to the working position for the first time is R0 + ΔR, that is, the ordinate of the first control point C1 is R0 + ΔR; the distance the indentation tool travels from the axis to the working position for the second time is R0 + ΔR + 360°, that is, the ordinate of the second control point C2 is R0 + ΔR + 360°.

[0090] In some embodiments, the rotation angle ΔR between the initial position and the working position of the indentation tool is 180°, and the angle of the initial position of the indentation tool is 0°. Therefore, the coordinates of the first control point C1 are 180°, and the total coordinates of the second control point C2 are 540°.

[0091] S10412: Based on the position information of the transverse pressure line corresponding to each indentation roller and the spacing △D, obtain the abscissa of the first control point and the second control point of the electronic cam curve of the indentation roller.

[0092] For ease of understanding, the following explanation uses the electronic cam curve of the first indentation roller as an example. The first indentation roller is used to process the first transverse indentation line 71 and the third transverse indentation line 73. The distance between the first creasing blade and the cutting blade in the working position along the first direction A1 is △D1. The starting point of the main shaft of one cam cycle of the electronic cam is the first end 75 of the sheet aligned with the cutting blade. Let the horizontal coordinate of the main shaft be M0 at this time. When the creasing blade on the first creasing roller reaches the working position for the first time, the sheet needs to travel to the position of the first horizontal creasing line 71 and align with the creasing blade (first creasing roller 30) in the working position. The travel distance of the main shaft is △D1+L1, and the horizontal coordinate of the main shaft is M0+△D1+L1. When the creasing blade on the first creasing roller reaches the working position for the second time, the sheet needs to travel to the position of the third horizontal creasing line 73 and align with the creasing blade (first creasing roller 30) in the working position. The travel distance of the main shaft from the starting point of the main shaft is △D1+L3, and the horizontal coordinate of the main shaft is M0+△D1+L3. Therefore, based on the position information of the transverse pressure line corresponding to each indentation roller and the spacing △D, the abscissas of the first and second control points of the electronic cam curve of the indentation roller are obtained.

[0093] S1042: Based on the coordinates of the first control point, obtain the starting coordinates and ending coordinates of the cam curve segment of the first synchronization zone; based on the coordinates of the second control point, obtain the starting coordinates and ending coordinates of the cam curve segment of the second synchronization zone. The linear speed of the indentation roller in each synchronization zone is equal to the traction speed of the spindle, and the first control point is the midpoint of the first synchronization zone, and the second control point is the midpoint of the second synchronization zone.

[0094] When processing each transverse indentation line, the linear speed of the indentation roller and the traction speed of the spindle need to be equal. Therefore, by setting a synchronization zone, the indentation roller can enter the speed synchronization state in advance.

[0095] S10421: Set the synchronization distance A1 of the first synchronization zone and the synchronization distance A2 of the second synchronization zone, wherein the synchronization distance is used to characterize the spindle displacement in the synchronization zone or the rotation angle of the slave axis in the synchronization zone.

[0096] The synchronization distance can be expressed either by the spindle displacement in the synchronization zone or by the rotation angle of the slave axis in the synchronization zone.

[0097] In some embodiments, for ease of calculation, the synchronization distance A1 of the first synchronization zone is equal to the synchronization distance A2 of the second synchronization zone.

[0098] S10422: Based on the coordinates of the first control point and the synchronization distance A1 of the first synchronization zone, obtain the starting coordinates and ending coordinates of the first synchronization zone. Based on the coordinates of the second control point and the synchronization distance A2 of the second synchronization zone, obtain the starting coordinates and ending coordinates of the second synchronization zone.

[0099] S1043: Based on the coordinates of the starting point, the starting and ending coordinates of the first synchronization zone, the starting and ending coordinates of the second synchronization zone, and the coordinates of the ending point, the electronic cam curve of each indentation axis is obtained.

[0100] Since the linear velocity of the indentation roller in each synchronization zone is equal to the traction speed of the main shaft, the vertical axis coordinate and the main shaft coordinate are directly proportional in each synchronization zone. After obtaining the start and end coordinates of each synchronization zone, the start and end coordinates of each synchronization zone are connected by a straight line to obtain the electronic cam curve segment of each synchronization zone, such as... Figure 5 As shown.

[0101] Polynomial interpolation is performed between the starting point and the beginning of the first synchronization zone, between the end of the first synchronization zone and the beginning of the second synchronization zone, and between the end of the second synchronization zone and the end point, to obtain the electronic cam curve segments for each of the above intervals. Combining these electronic cam curve segments yields the electronic cam curve for each indentation roller.

[0102] Because the dimensions of each batch of processed packaging boxes vary, the position of the transverse creases on the sheet material 70 used to form the packaging boxes differs, while the diameter of the creasing roller remains constant. Therefore, for some packaging boxes, the spindle length between the end point of the first synchronization zone and the beginning point of the second synchronization zone may be greater than the circumference of the creasing roller. In this case, the creasing roller will rotate in the opposite direction. To solve this problem, a buffer zone is set between the first and second synchronization zones. In the buffer zone, the position of the creasing knife (i.e., the driven axis) is always maintained at 360°, meaning the creasing roller remains stationary in the buffer zone, thus preventing the aforementioned reverse rotation.

[0103] In some embodiments, step S104 further includes sub-step S1044: planning the cam curve segment of the buffer zone based on the coordinates of the first control point and the second control point, wherein the buffer zone is located between the first synchronization zone and the second synchronization zone, and the ordinate value of any point in the buffer zone is equal to 360°. Sub-step S1044 includes the following sub-steps:

[0104] S10441: Based on the coordinates of the first and second control points, obtain the x-coordinate of the midpoint of the buffer zone. The distance from the midpoint of the buffer zone to the principal axis of the first control point is N1, and the distance to the midpoint to the principal axis of the second control point is N2, where N1 / N2 = 0.8~1.2. Figure 5 As shown.

[0105] Since the ordinate of any point in the buffer is equal to 360°, the electronic cam curve segment of the buffer can be obtained simply by obtaining the abscissas of the start and end points of the buffer.

[0106] S10442: Set the main axis displacement B of the buffer zone, such as Figure 5 As shown.

[0107] In some embodiments, the main axis displacement B of the buffer is 12-24 mm.

[0108] S10443: Based on the x-coordinate of the midpoint of the buffer and the principal axis displacement B of the buffer, obtain the starting and ending coordinates of the buffer.

[0109] Let the x-coordinate of the midpoint of the buffer be X. M If the principal axis displacement of the buffer is B, then the x-coordinate of the starting point of the buffer is X. M -B / 2, the x-coordinate of the end point of the buffer is X. M +B / 2. If the ordinate of any point in the buffer is equal to 360°, then the coordinates of the starting point of the buffer are (X... M -B / 2, 360), the coordinates of the end point of the buffer are (X M +B / 2, 360).

[0110] S10444: Based on the start and end coordinates of the buffer, obtain the electronic cam curve segment of the buffer.

[0111] The ordinate of any point in the buffer is equal to 360°. Therefore, by connecting the starting and ending coordinates of the buffer with a horizontal line segment, the electronic cam curve segment of the buffer can be obtained.

[0112] S105: Each indentation roller drive unit drives the indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line.

[0113] For example, such as Figure 2 As shown, the cutting and creasing control device includes two creasing rollers: a first creasing roller and a second creasing roller. The main axis of the electronic cam curve of each creasing roller is the traction shaft 80, and the driven axis is its corresponding creasing axis, thus establishing a synchronization relationship between the traction shaft 80 and each creasing axis, as shown. Figure 4 As shown, during the process of the traction roller pulling the sheet material along the first direction A1, each indentation roller forms a transverse indentation line at the target transverse indentation line position on the sheet material according to its corresponding electronic cam curve.

[0114] The adaptive cutting and creasing control scheme of this application can automatically plan different electronic cam curves based on the size information of the packaging box to suit various specifications of packaging boxes. The electronic cam has advantages such as flexible debugging and simple operation, avoiding the problems of complex design, difficult equipment maintenance, and high installation requirements of mechanical cams, thereby reducing the complexity of debugging and the difficulty of mechanical design. This adaptive cutting and creasing control scheme improves the adaptability of the equipment and meets the processing and manufacturing needs of packaging boxes of various sizes. The equipment automatically adjusts its size during operation, improving production efficiency and ease of use.

[0115] In some embodiments, method 100 further includes the following steps:

[0116] S105: Conduct trial production based on the electronic cam curve, and adjust the electronic cam curve according to the results of the trial production. Step S105 also includes the following sub-steps:

[0117] S1051: If the slave axis acceleration in the asynchronous zone of the electronic cam curve is greater than the acceleration threshold, then reduce the synchronization distance.

[0118] S1052: If the sheet is stretched or the flatness of the sheet is greater than the flatness threshold, determine whether the set mechanical parameters are accurate. If accurate, increase the synchronization distance.

[0119] If the sheet is stretched or its flatness exceeds the flatness threshold, first determine if the mechanical parameters set by the cutting and creasing control device are accurate. If the mechanical parameters are accurate, it indicates that the stretching or unevenness of the sheet is caused by the inconsistency between the spindle's traction speed and the creasing roller's rotational linear speed during cross-crewing, requiring an increase in the synchronization distance.

[0120] In some embodiments, method 100 further includes the following steps:

[0121] S106: When the traction distance of the traction shaft 80 is equal to an integer multiple of the cutting size Lx, the cutting blade moves to cut the sheet.

[0122] The movement of each creasing roller and the action of the cutting knife are linked by the traction shaft 80, thereby processing the sheet material for forming the packaging box according to the size of the packaging box.

[0123] The following is combined with Figures 2-5 An adaptive cutting and creasing control method with two creasing rollers is described.

[0124] like Figure 2 As shown, the cutting and creasing control device of this embodiment is provided with a cutting blade, a first creasing roller 30 and a second creasing roller 40 in sequence along the direction of sheet travel (i.e., the first direction A1). The initial position of the creasing blade on each creasing roller is located directly above, i.e., at the 12 o'clock position, and the working position of each creasing blade is located directly below, i.e., at the 6 o'clock position. The rotation angle ΔR between the initial position and the working position of the creasing blade is 180°.

[0125] The first indentation roller presses on Figure 3 The second indentation roller presses on the first transverse indentation line 71 and the third transverse indentation line 73 on the sheet material, and presses on the second transverse indentation line 72 and the fourth transverse indentation line 74.

[0126] The position of each horizontal crease is related to the width 'a' and height 'c' of the packaging box. For example... Figure 3As shown, based on the height c of the packaging box, the thickness of the sheet material, and the manufacturing process, the distance c′ between the first horizontal pressure line 71 and the second horizontal pressure line 72, and the distance c″ between the third horizontal pressure line 73 and the fourth horizontal pressure line 74 can be obtained. Based on the width b of the packaging box, the thickness of the sheet material, and the manufacturing process, the distance b′ between the second horizontal pressure line 72 and the third horizontal pressure line 73, and the distance b″ between the fourth horizontal pressure line 74 and the second end 76 of the sheet material can be obtained. According to the following calculation formula, the distance between each horizontal pressure line and the first end 75 of the sheet material, and the cutting length Lx of the sheet material 70 used to form the packaging box can be obtained.

[0127]

[0128] In Formula 1, L1 is the distance between the first horizontal pressure line 71 and the first end 75 of the sheet, which is the size of the overlapping tongue of the packaging box and is determined by the packaging box processing technology. In Formula 1, L2 is the distance between the second horizontal pressure line 72 and the first end 75 of the sheet, L3 is the distance between the third horizontal pressure line 73 and the first end 75 of the sheet, and L4 is the distance between the fourth horizontal pressure line 74 and the first end 75 of the sheet.

[0129] Planning the electronic cam curve of the first indentation roller

[0130] The first creasing roller is used to process the first transverse creasing line 71 and the third transverse creasing line 73. Based on the position information L1 and L3 of the first transverse creasing line 71 and the third transverse creasing line 73, the abscissas of the first and second control points of the electronic cam curve of the first creasing roller can be obtained. Based on the rotation angle ΔR between the initial position and the working position of the creasing blade, the ordinates of the first and second control points can be obtained. The starting point of the main shaft of one cam cycle of the electronic cam is the first end 75 of the sheet aligned with the cutting blade. Let the abscissa of the main shaft be 0 at this time, and let the initial position angle of the creasing blade be 0. Let the rotation angle ΔR between the initial position and the working position of the creasing blade on each creasing roller be 180°.

[0131] The x-coordinate of the first control point C1 is: M C1 =L0+L1

[0132] The ordinate V of the first control point C1 C1 =180.

[0133] The x-coordinate of the second control point C2 is: M C2 =L0+L3

[0134] The ordinate V of the second control point C2 C2 =180+360=540.

[0135] Let N1 be the distance between the midpoint C3 of the buffer zone and the principal axis of the first control point C1, which is equal to N2 the distance between the midpoint C3 and the principal axis of the second control point C2. Then,

[0136] The x-coordinate of the midpoint C3 of the buffer is

[0137] The ordinate V of the midpoint C3 of the buffer zone C3 =360.

[0138] Based on the coordinates of the first control point C1 and the synchronization distance A1 of the first synchronization zone, the coordinates of the starting point K1 and the ending point K2 of the first synchronization zone can be obtained. Similarly, based on the coordinates of the second control point C2 and the synchronization distance A2 of the second synchronization zone, the coordinates of the starting point K5 and the ending point K6 of the second synchronization zone can be obtained. In this embodiment, the synchronization distance of the first synchronization zone is equal to the synchronization distance of the second synchronization zone, both being A. The synchronization distance A is used to characterize the rotation angle of the shaft within the synchronization zone.

[0139] The x-coordinate of the starting point K1 of the first synchronization zone is: M1 = L0 + L1 - A / 2 / 360 × C;

[0140] The ordinate of the starting point K1 of the first synchronization zone is: V1 = 180 - A / 2;

[0141] The x-coordinate of the endpoint K2 of the first synchronization zone is: M2 = L0 + L1 + A / 2 / 360 × C;

[0142] The ordinate of the endpoint K2 of the first synchronization zone is: V2 = 180 + A / 2;

[0143] The x-coordinate of the starting point K5 of the second synchronization zone is: M5 = L0 + L3 - A / 2 / 360 × C;

[0144] The ordinate of the starting point K5 of the second synchronization zone is: V5 = 540 - A / 2;

[0145] The x-coordinate of the endpoint K6 of the second synchronization zone is: M6 = L0 + L3 + A / 2 / 360 × C;

[0146] The ordinate of the endpoint K6 of the second synchronization zone is: V6 = 540 + A / 2;

[0147] Where C is the circumference of the indentation shaft.

[0148] Based on the coordinates of the midpoint C3 of the buffer and the principal axis displacement B of the buffer, the coordinates of the starting point K3 and the ending point K4 of the buffer can be obtained.

[0149] The x-coordinate of the starting point K3 of the buffer zone is:

[0150] The ordinate of the starting point K3 of the buffer zone is: V3 = 360;

[0151] The x-coordinate of the endpoint K4 of the buffer is:

[0152] The ordinate of the endpoint K4 of the buffer zone is: V4 = 360;

[0153] The coordinates of the starting point K0 of the electronic cam curve are (0, 0), and the coordinates of the ending point K7 are (L0+Lx, 720).

[0154] Between the starting point K0 and the starting point K1 of the first synchronization zone, between the ending point K2 of the first synchronization zone and the starting point K3 of the buffer zone, between the ending point K4 of the buffer zone and the starting point K5 of the second synchronization zone, and between the ending point K6 of the second synchronization zone and the ending point K7, polynomial interpolation, such as a fifth-degree polynomial, can be used to obtain the cam curve segments of each of the above intervals.

[0155] A straight line is used to connect the starting point K1 and the ending point K2 of the first synchronization zone, and the starting point K5 and the ending point K6 of the second synchronization zone, to obtain the cam curve segments of the two synchronization zones.

[0156] A horizontal straight line segment is used to connect the starting point K3 and the ending point K4 of the buffer zone to obtain the cam curve segment of the buffer zone.

[0157] Thus, the electronic cam curve of the first indentation roller was obtained.

[0158] Planning the electronic cam curve of the second indentation roller

[0159] The second indentation roller 40 is used to process the second transverse indentation line 72 and the fourth transverse indentation line 74. Based on the position information L2 and L4 of the second transverse indentation line 72 and the fourth transverse indentation line 74, the abscissas of the first and second control points of the electronic cam curve of the second indentation roller can be obtained. Based on the rotation angle ΔR between the initial position and the working position of the indentation tool, the ordinates of the first and second control points can be obtained.

[0160] Based on the coordinates of the first and second control points, the coordinates of the midpoint of the buffer zone are obtained.

[0161] Based on the coordinates of the first control point and the synchronization distance A1 of the first synchronization zone, the coordinates of the starting point K1 and the ending point K2 of the first synchronization zone can be obtained. Based on the coordinates of the second control point and the synchronization distance A2 of the second synchronization zone, the coordinates of the starting point K5 and the ending point K6 of the second synchronization zone can be obtained.

[0162] Based on the coordinates of the midpoint C3 of the buffer and the principal axis displacement B of the buffer, the coordinates of the starting point K3 and the ending point K4 of the buffer can be obtained.

[0163] The electronic cam curve of the second indentation roller was obtained based on the coordinates of the starting point, the starting point and ending point of the first synchronization zone, the starting point and ending point of the buffer zone, and the starting point and ending point of the second synchronization zone.

[0164] The process of planning the electronic cam curve of the second indentation roller is the same as that of the first indentation roller, and will not be repeated here.

[0165] Adaptive cutting and crease control device

[0166] like Figure 2 As shown, the adaptive sheet cutting and creasing device of this embodiment includes, along the first direction A1, a cutting blade and N creasing rollers, each creasing roller having a creasing blade arranged on its surface. The sheet cutting and creasing device also includes a traction roller, N≥1, and the first direction A1 is the direction of sheet travel. The adaptive sheet cutting and creasing device includes:

[0167] The first acquisition module is used to acquire the size information of the packaging box;

[0168] The calculation module is used to obtain the cutting size Lx of the sheet along the first direction A1 and the position information of each horizontal pressure line along the first direction A1 based on the size information, wherein the horizontal pressure line is perpendicular to the first direction A1;

[0169] The second acquisition module is used to acquire the initial position and the rotation angle △R of the working position of each indentation knife, as well as the distance △D between the indentation knife and the cutting knife along the first direction A1 at each working position, wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line.

[0170] The cam curve planning module is used to plan the electronic cam curve of each indentation axis based on the cutting size Lx, the position information of the horizontal indentation line, the rotation angle △R of each indentation knife, and the spacing △D. The main axis of the electronic cam curve is the traction axis 80, and the slave axis is the indentation axis.

[0171] A drive unit is used to drive the indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line at the indentation line position.

[0172] In some implementations, the master axis of the electronic cam profile of each indentation roller is a linear axis, and the slave axis is a rotary axis. For example... Figure 2As shown, the sheet cutting and creasing device includes a second creasing roller 40 and a first creasing roller 30 along the first direction A1. The sheet material 70 used to form the packaging box includes a fourth transverse creasing line 74, a third transverse creasing line 73, a second transverse creasing line 72, and a first transverse creasing line 71 along the first direction A1. The main shaft length of one cam cycle of the electronic cam curve of each creasing roller is equal to the sum of the cutting size Lx and the creasing blade spacing △D of the creasing roller, and the spindle length is 720°. The driving device includes a first driving module and a second driving module. The driving module drives the first creasing roller to rotate 720° in one cam cycle to form the first transverse creasing line 71 and the third transverse creasing line 73 based on the electronic cam curve of the first creasing roller. The second driving module drives the second creasing roller to rotate 720° in one cam cycle to form the second transverse creasing line 72 and the fourth transverse creasing line 74 based on the electronic cam curve of the second creasing roller.

[0173] In some implementations, the cam curve planning module further includes:

[0174] Key point coordinate acquisition submodule: used to acquire the coordinates of the start point, end point, first control point and second control point of the electronic cam curve of each indentation roller. The first control point is used to characterize the first time the indentation tool reaches the working position within one cam cycle, and the second control point is used to characterize the second time the indentation tool reaches the working position within one cam cycle.

[0175] Synchronization zone start and end coordinate calculation submodule: It is used to obtain the start and end coordinates of the cam curve segment of the first synchronization zone based on the coordinates of the first control point, and to obtain the start and end coordinates of the cam curve segment of the second synchronization zone based on the coordinates of the second control point. The linear speed of the indentation roller and the traction speed of the spindle in each synchronization zone are equal, and the first control point is the midpoint of the first synchronization zone and the second control point is the midpoint of the second synchronization zone.

[0176] Cam curve planning submodule: It obtains the electronic cam curve of each indentation axis based on the coordinates of the starting point, the starting and ending coordinates of the first synchronization zone, the starting and ending coordinates of the second synchronization zone, and the coordinates of the ending point.

[0177] In some implementations, the synchronization zone start-point and end-point coordinate calculation submodule further includes:

[0178] The synchronization distance setting unit is used to set the synchronization distance A1 of the first synchronization zone and the synchronization distance A2 of the second synchronization zone, wherein the synchronization distance is used to characterize the spindle displacement in the synchronization zone or the rotation angle of the slave axis in the synchronization zone.

[0179] The unit for calculating the starting and ending coordinates of the synchronization zone obtains the starting and ending coordinates of the first synchronization zone based on the coordinates of the first control point and the synchronization distance A1 of the first synchronization zone, and obtains the starting and ending coordinates of the second synchronization zone based on the coordinates of the second control point and the synchronization distance A2 of the second synchronization zone.

[0180] In some implementations, the key point coordinate acquisition submodule further includes:

[0181] The control point ordinate calculation unit obtains the ordinates of the first and second control points of the electronic cam curve of the indentation roller based on the rotation angle ΔR of each indentation roller.

[0182] The control point abscissa calculation unit obtains the abscissas of the first and second control points of the electronic cam curve of the indentation roller based on the position information of the transverse pressure line corresponding to each indentation roller and the spacing △D.

[0183] In some implementations, the cam curve planning module further includes a buffer cam curve segment planning submodule, wherein the buffer is located between the first synchronization zone and the second synchronization zone, and the ordinate value of any point in the buffer is equal to 360°. This module includes:

[0184] The abscissa acquisition unit of the buffer midpoint obtains the abscissa of the buffer midpoint based on the coordinates of the first control point and the second control point. The distance between the buffer midpoint and the principal axis of the first control point is N1, and the distance between the buffer midpoint and the principal axis of the second control point is N2, where N1 / N2 = 0.8 to 1.2.

[0185] The buffer's main axis displacement setting unit sets the buffer's main axis displacement B.

[0186] The buffer's start and end coordinates calculation unit obtains the buffer's start and end coordinates based on the abscissa of the buffer's midpoint and the buffer's principal axis displacement B.

[0187] The electronic cam curve segment planning unit of the buffer zone obtains the electronic cam curve segment of the buffer zone based on the starting coordinates and ending coordinates of the buffer zone.

[0188] In some implementations, the rotation angle ΔR is 180°.

[0189] In some implementations, the spindle displacement B of the buffer is 12-24 mm.

[0190] In some embodiments, the adaptive cutting and creasing control device further includes a cutting blade control module configured such that when the traction distance of the traction shaft 80 is equal to an integer multiple of the cutting size Lx, the cutting blade actuates to cut the sheet.

[0191] electronic devices

[0192] This embodiment provides a schematic diagram of an electronic device. The specific implementation of this application is not limited to the electronic device itself. The electronic device provided in this embodiment includes: a processor, a communications interface, memory, and a bus. Wherein:

[0193] The processor, communication interface, and memory 806 communicate with each other via a bus.

[0194] A communication interface is used to communicate with other electronic devices or servers.

[0195] The processor is used to execute programs, specifically the relevant steps in the above-described embodiments of the device movement pose calibration method.

[0196] Specifically, the program may include program code, which includes computer operation instructions.

[0197] The processor may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. The one or more processors included in the smart device may be processors of the same type, such as one or more CPUs; or they may be processors of different types, such as one or more CPUs and one or more ASICs.

[0198] Memory is used to store programs. Memory may include high-speed RAM, and may also include non-volatile memory, such as at least one disk drive.

[0199] Specifically, the program can be used to cause the processor to execute the adaptive cutting and creasing control method in any of the foregoing embodiments.

[0200] The specific implementation of each step in the program can be found in the corresponding steps and units described in the above-described adaptive cutting and creasing control method embodiment, and will not be repeated here. Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the devices and modules described above can be referred to the corresponding process descriptions in the aforementioned method embodiments, and will not be repeated here.

[0201] Computer-readable storage media

[0202] This application also provides a computer-readable storage medium storing instructions for causing a machine to perform the adaptive cutting and creasing control method as described herein. Specifically, a system or apparatus equipped with a storage medium storing software program code that implements the functions of any of the embodiments described above, and enabling the computer (or CPU or MPU) of the system or apparatus to read and execute the program code stored in the storage medium.

[0203] In this case, the program code read from the storage medium can itself implement the function of any of the above embodiments, and therefore the program code and the storage medium storing the program code constitute part of this application.

[0204] Examples of storage media used to provide program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, program code can be downloaded from a server computer via a communication network.

[0205] Computer program products

[0206] This application also provides a computer program product, including computer instructions that instruct a computing device to perform any corresponding operation in the above-described plurality of method embodiments.

[0207] It should be noted that, depending on the implementation needs, the various components / steps described in the embodiments of this application can be broken down into more components / steps, or two or more components / steps or parts of the operation of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of this application.

[0208] The methods described in the embodiments of this application can be implemented in hardware, firmware, or as software or computer code that can be stored in a recording medium (such as a CD-ROM, RAM, floppy disk, hard disk, or magneto-optical disk), or as computer code downloaded over a network that is originally stored in a remote recording medium or a non-transitory machine-readable medium and will be stored in a local recording medium. Thus, the methods described herein can be processed by software stored on a recording medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware (such as an ASIC or FPGA). It is understood that the computer, processor, microprocessor controller, or programmable hardware includes storage components (e.g., RAM, ROM, flash memory, etc.) capable of storing or receiving software or computer code that, when accessed and executed by the computer, processor, or hardware, implements the methods described herein. Furthermore, when a general-purpose computer accesses code used to implement the methods shown herein, the execution of the code transforms the general-purpose computer into a dedicated computer for executing the methods shown herein.

[0209] It should be noted that not all steps and modules in the above processes and system structure diagrams are mandatory; some steps or modules can be omitted as needed. The execution order of each step is not fixed and can be adjusted as required. The system structure described in the above embodiments can be a physical structure or a logical structure. That is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or they may be jointly implemented by certain components in multiple independent devices.

[0210] In this patent application, nouns and pronouns relating to people are not limited to specific genders.

[0211] In the above embodiments, the hardware modules can be implemented mechanically or electrically. For example, a hardware module may include permanent dedicated circuitry or logic (such as a dedicated processor, FPGA, or ASIC) to perform the corresponding operations. The hardware module may also include programmable logic or circuitry (such as a general-purpose processor or other programmable processor), which can be temporarily configured by software to perform the corresponding operations. The specific implementation method (mechanical, dedicated permanent circuitry, or temporarily configured circuitry) can be determined based on cost and time considerations.

[0212] The present invention has been shown and described in detail above with reference to the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art will know that more embodiments of the present invention can be obtained by combining the code review methods in the different embodiments above. These embodiments are also within the protection scope of the present invention.

Claims

1. An adaptive cutting and creasing control method for sheet material cutting and creasing devices, characterized in that, The sheet cutting and creasing device includes, along the first direction (A1), a cutting blade and N creasing rollers, each creasing roller having a creasing blade arranged on its surface. The sheet cutting and creasing device also includes a traction roller, where N ≥ 1. The first direction (A1) is the direction of sheet travel. The adaptive creasing control method includes the following steps: Obtain the dimensions of the packaging box; Based on the size information, the cutting size Lx of the sheet along the first direction (A1) and the position information of each transverse pressing line along the first direction (A1) are obtained, wherein the transverse pressing line is perpendicular to the first direction (A1). Obtain the initial position and the rotation angle △R of each indentation knife at the working position, and the distance △D between the indentation knife and the cutting knife at each working position along the first direction (A1), wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line; Based on the cutting size Lx, the position information of the horizontal pressing line, the rotation angle △R and the spacing △D of each pressing knife, the electronic cam curve of each pressing axis is planned, wherein the main axis of the electronic cam curve is the traction axis (80) and the slave axis is the pressing axis; Each indentation roller drive unit drives the indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line; In this system, the main axis of the electronic cam curve for each indentation roller is a linear axis, and the slave axis is a rotational axis; and, The sheet cutting and creasing device includes, along the first direction (A1), a second creasing roller (40) and a first creasing roller (30), and the sheet material (70) for forming the packaging box includes, along the first direction (A1), a fourth transverse creasing line (74), a third transverse creasing line (73), a second transverse creasing line (72), and a first transverse creasing line (71); and The main shaft length of one cam cycle of the electronic cam curve of each creasing roller is equal to the sum of the cutting dimension Lx and the creasing blade spacing ΔD of the creasing roller, with a spindle length of 720. 。 The step of driving each indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line further includes: The first indentation roller drive device drives the first indentation roller (30) to rotate 720 degrees within one cam cycle based on the electronic cam curve of the first indentation roller. 。 To form the first horizontal pressure line (71) and the third horizontal pressure line (73); The second indentation roller drive device drives the second indentation roller (40) to rotate 720 degrees within one cam cycle based on the electronic cam curve of the second indentation roller. 。 To form the second horizontal pressure line (72) and the fourth horizontal pressure line (74); Based on the cutting size Lx, the position information of the transverse indentation line, the rotation angle △R and spacing △D of each indentation knife, the step of planning the electronic cam curve of each indentation axis further includes: The coordinates of the start point, end point, first control point, and second control point of the electronic cam curve of each indentation roller are obtained, wherein the first control point is used to characterize the first time the indentation tool reaches the working position within one cam cycle, and the second control point is used to characterize the second time the indentation tool reaches the working position within one cam cycle. Based on the coordinates of the first control point, the starting and ending coordinates of the cam curve segment of the first synchronization zone are obtained, and based on the coordinates of the second control point, the starting and ending coordinates of the cam curve segment of the second synchronization zone are obtained. The linear rotational speed of the indentation roller and the traction speed of the spindle are equal in each synchronization zone, and the first control point is the midpoint of the first synchronization zone, and the second control point is the midpoint of the second synchronization zone. The electronic cam curve for each indentation axis is obtained based on the coordinates of the starting point, the starting and ending coordinates of the first synchronization zone, the starting and ending coordinates of the second synchronization zone, and the coordinates of the ending point.

2. The adaptive cutting and creasing control method as described in claim 1, characterized in that, The step of obtaining the start and end coordinates of the cam curve segment in the first synchronization zone based on the coordinates of the first control point, and obtaining the start and end coordinates of the cam curve segment in the second synchronization zone based on the coordinates of the second control point, further includes: Set the synchronization distance A1 of the first synchronization zone and the synchronization distance A2 of the second synchronization zone, wherein the synchronization distance is used to characterize the spindle displacement of the main spindle in the synchronization zone or the rotation angle of the slave axis in the synchronization zone. Based on the coordinates of the first control point and the synchronization distance A1 of the first synchronization zone, the starting coordinates and ending coordinates of the first synchronization zone are obtained. Based on the coordinates of the second control point and the synchronization distance A2 of the second synchronization zone, the starting coordinates and ending coordinates of the second synchronization zone are obtained.

3. The adaptive cutting and creasing control method as described in claim 2, characterized in that, The step of obtaining the coordinates of the start point, end point, first control point, and second control point of the electronic cam curve for each indentation roller further includes: Based on the rotation angle ΔR of each indentation roller, the ordinates of the first and second control points of the electronic cam curve of that indentation roller are obtained; Based on the position information of the transverse pressure line corresponding to each indentation roller and the spacing △D, the abscissas of the first and second control points of the electronic cam curve of the indentation roller are obtained.

4. The adaptive cutting and creasing control method as described in claim 3, characterized in that, Based on the cutting size Lx, the position information of the horizontal indentation line, the rotation angle △R and spacing △D of each indentation knife, the step of planning the electronic cam curve of each indentation axis further includes the following steps: Based on the coordinates of the first control point and the second control point, plan the cam curve segment of the buffer zone, wherein the buffer zone is located between the first synchronization zone and the second synchronization zone, and the ordinate value of any point in the buffer zone is equal to 360. 。 It includes the following sub-steps: Based on the coordinates of the first control point and the second control point, the x-coordinate of the midpoint of the buffer is obtained, wherein the distance between the midpoint of the buffer and the principal axis of the first control point is N1, and the distance between the midpoint and the principal axis of the second control point is N2, and N1 / N2 = 0.8~1.2; Set the main axis displacement B of the buffer; The starting point coordinates and ending point coordinates of the buffer are obtained based on the x-coordinate of the midpoint of the buffer and the principal axis displacement B of the buffer. Based on the start and end coordinates of the buffer, the electronic cam curve segment of the buffer is obtained.

5. The adaptive cutting and creasing control method as described in claim 4, characterized in that, The rotation angle ΔR is 180°. 。 The spindle displacement B of the buffer zone is 12-24 mm.

6. The adaptive cutting and creasing control method as described in claim 5, characterized in that, The adaptive cutting and crease control method further includes the following steps: The process of conducting trial production based on the electronic cam curve and adjusting the electronic cam curve according to the results of the trial production includes the following sub-steps: If the slave axis acceleration in the asynchronous zone of the electronic cam curve is greater than the acceleration threshold, then the synchronization distance is reduced; If the sheet is stretched or the flatness of the sheet is greater than the flatness threshold, then determine whether the set mechanical parameters are accurate. If they are accurate, then increase the synchronization distance.

7. The adaptive cutting and creasing control method as described in claim 6, characterized in that, The adaptive cutting and crease control method further includes the following steps: When the traction distance of the traction shaft (80) is equal to an integer multiple of the cutting size Lx, the cutting blade moves to cut the sheet.

8. An adaptive cutting and creasing control device, characterized in that, The adaptive sheet cutting and creasing device includes, along a first direction (A1), a cutting blade and N creasing rollers, each creasing roller having a creasing blade arranged on its surface. The device also includes a traction roller, where N ≥ 1. The first direction (A1) is the direction of sheet travel. The adaptive sheet cutting and creasing device comprises: The first acquisition module is used to acquire the size information of the packaging box; The calculation module is used to obtain the cutting size Lx of the sheet along the first direction (A1) and the position information of each horizontal pressure line along the first direction (A1) based on the size information, wherein the horizontal pressure line is perpendicular to the first direction (A1). The second acquisition module is used to acquire the initial position and the rotation angle △R of the working position of each indentation knife, as well as the distance △D between the indentation knife and the cutting knife in the first direction (A1) at each working position, wherein the working position is the position where the indentation knife applies pressure to the raw material to form a transverse indentation line. The cam curve planning module is used to plan the electronic cam curve of each indentation axis based on the cutting size Lx, the position information of the horizontal indentation line, the rotation angle △R of each indentation knife and the spacing △D, wherein the main axis of the electronic cam curve is the traction axis (80) and the slave axis is the indentation axis; A drive device for driving the indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line at the indentation line position; In this system, the main axis of the electronic cam curve for each indentation roller is a linear axis, and the slave axis is a rotational axis; and, The sheet cutting and creasing device includes, along the first direction (A1), a second creasing roller (40) and a first creasing roller (30), and the sheet material (70) for forming the packaging box includes, along the first direction (A1), a fourth transverse creasing line (74), a third transverse creasing line (73), a second transverse creasing line (72), and a first transverse creasing line (71); and The main shaft length of one cam cycle of the electronic cam curve of each creasing roller is equal to the sum of the cutting dimension Lx and the creasing blade spacing ΔD of the creasing roller, with a spindle length of 720. 。 The step of driving each indentation roller to rotate based on the electronic cam curve of the indentation roller to form a transverse indentation line further includes: The first indentation roller drive device drives the first indentation roller (30) to rotate 720 degrees within one cam cycle based on the electronic cam curve of the first indentation roller. 。 To form the first horizontal pressure line (71) and the third horizontal pressure line (73); The second indentation roller drive device drives the second indentation roller (40) to rotate 720 degrees within one cam cycle based on the electronic cam curve of the second indentation roller. 。 To form the second horizontal pressure line (72) and the fourth horizontal pressure line (74); The cam curve planning module is further configured as follows: The coordinates of the start point, end point, first control point, and second control point of the electronic cam curve of each indentation roller are obtained, wherein the first control point is used to characterize the first time the indentation tool reaches the working position within one cam cycle, and the second control point is used to characterize the second time the indentation tool reaches the working position within one cam cycle. Based on the coordinates of the first control point, the starting and ending coordinates of the cam curve segment of the first synchronization zone are obtained, and based on the coordinates of the second control point, the starting and ending coordinates of the cam curve segment of the second synchronization zone are obtained. The linear rotational speed of the indentation roller and the traction speed of the spindle are equal in each synchronization zone, and the first control point is the midpoint of the first synchronization zone, and the second control point is the midpoint of the second synchronization zone. The electronic cam curve for each indentation axis is obtained based on the coordinates of the starting point, the starting and ending coordinates of the first synchronization zone, the starting and ending coordinates of the second synchronization zone, and the coordinates of the ending point.

Images