EP3981562A1 - Verfahren zur steuerung eines schneidplotters und vorrichtung zur durchführung solch eines verfahrens - Google Patents

Verfahren zur steuerung eines schneidplotters und vorrichtung zur durchführung solch eines verfahrens Download PDF

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Publication number
EP3981562A1
EP3981562A1 EP21200890.8A EP21200890A EP3981562A1 EP 3981562 A1 EP3981562 A1 EP 3981562A1 EP 21200890 A EP21200890 A EP 21200890A EP 3981562 A1 EP3981562 A1 EP 3981562A1
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EP
European Patent Office
Prior art keywords
blade
cut
cutting
cut out
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21200890.8A
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English (en)
French (fr)
Inventor
Filip Alfons H DEPREEUW
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fdpvision CV
Original Assignee
Fdpvision CV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fdpvision CV filed Critical Fdpvision CV
Publication of EP3981562A1 publication Critical patent/EP3981562A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/005—Computer numerical control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D2005/002—Performing a pattern matching operation

Definitions

  • the invention is intended for drastically reducing the cutting time and improving the cutting quality of cutting plotters equipped with a blade.
  • cutting plotters are used for cutting all kinds of materials such as paper, cardboard, fabric, sticker film, plastic film, textile film, but also metal, wood and the like.
  • the material can be pre-printed with the desired design, for example, a pattern, text, figures, photos and the like. Typically, said designs are created with computer software.
  • the possibly pre-printed material is put on the cutting plotter and subsequently, using the cutting plotter, said figures, texts, logos, shapes, designs can be cut out of the relevant material.
  • the laser cutting plotter cuts the material using a laser.
  • a laser is suitable for metal, but is also applied in other materials.
  • a blade cutting plotter cuts the material using a blade, the so-called cutting plotter blade.
  • Such type is chiefly used for paper, cardboard, film, textile, and the like.
  • Two types of blade cutting plotters are distinguished hereby, on the one hand roll-to-roll cutting plotters, whereby mostly rolls or sheets of film, which are located on a holder, are cut and on the other hand flatbed cutting plotters, whereby the material is put on a table and can be cut.
  • Said path or said route is also chosen to minimise the rest time between the different figures and the like that are cut out
  • the blade or the laser is controlled by a control unit, provided with CAD-CAM software or a driver, which based on the design created by the drawing program moves the laser or the blade according to the predefined path or the predefined route, whereby on said path the necessary on/off actions for the laser or the necessary stop and start points and up-and-down motions of the blade are preprogrammed.
  • a control unit provided with CAD-CAM software or a driver, which based on the design created by the drawing program moves the laser or the blade according to the predefined path or the predefined route, whereby on said path the necessary on/off actions for the laser or the necessary stop and start points and up-and-down motions of the blade are preprogrammed.
  • the figures are often designed in a drawing program, which is read into a special CAD-CAM program to control the cutting plotter. It is not excluded this involves one single computer program, whereby the drawing software also comprises a control module for the cutting plotter.
  • the problem with blade cutting plotters is that the deceleration of the blade during the performance of a cut to bring the cutting blade to a standstill to be able to lift the blade and the acceleration of the blade to be able to perform a next cut to allow the blade to be set in motion again after having been lowered, involves extra time compared to simply switching a laser on or off.
  • the blade of blade cutting plotters will also have to be stopped in between to rotate the blade according to the cut to be made, when the path or route contains a (sharp) angle, in practice this angle is adjustable and usually set between 10 and 45 degrees, which takes even more additional time compared to a laser cutting plotter.
  • the cut that the blade makes when decelerating to bring the cutting blade to a standstill after the performance of a cut and when accelerating to allow the blade to be set in motion again before the next cut is not guaranteed to be clean and nice.
  • the X and Y motions of the blade need to be perfectly synchronised to be able to make a nice and clean cut in the material to be cut. Said synchronisation is difficult to achieve and guarantee, during an acceleration or deceleration of the cutting blade, such that during an acceleration or deceleration of the cutting blade, the cut will not be clean and sleek. The edges of the cut out figure or the like may be ragged.
  • the purpose of the present invention is to provide a solution to at least one of the aforementioned and other disadvantages relating to blade cutting plotters.
  • the object of the present invention is a method for controlling a cutting plotter, comprising a cutting surface to mount the material to be cut on, and a blade which in cutting position is positioned perpendicular to a cutting plane, whereby the method essentially consists of the following steps:
  • the blade of the cutting plotter is mounted in a blade holder which is part of a tool holder.
  • Cutting plane refers to the geometric plane in which the blade performs a cutting motion and will practically coincide with the surface of the material 6 that is being cut.
  • Figures and the like refer to patterns, texts, letters, numbers, figures, photographs, logos, shapes or other designs.
  • Residual material refers to the material that is not part of said figures and the like, said material will be discarded as waste or processed further after cutting out the figures and the like.
  • the advantage of a pre- or post-cut at sharp angles in the figure is that the actions of stopping and re-starting the blade, whereby the blade will decelerate or accelerate, can be done in or during the pre-cut and post-cut.
  • the length of the pre-cut and post-cut must be long enough to give the blade the time to gather speed or come to a standstill.
  • a typical speed of the blade for an X-Y motion i.e. a motion in or parallel with the cutting plane is 1m/s, whereas a typical acceleration of the blade amounts to 9.81m/s 2 .
  • Another advantage is that by adjusting the path between two figures to be cut out in the extension of the figures to be cut out, there will be no big angles in said section of the path, such that there will be little or no need to slow down during the path between the figures. Consequently the cutting speed will be increased. It is not necessary either to lift the blade between two figures to be cut out. The blade can therefore continue to cut on the path between two figures, which implies even greater time savings.
  • the method comprises the step of lowering the blade into the cutting plane or increasing the pressure the blade exercises on the material to be cut out during said pre-cut and/or lifting the blade out of the cutting plane or decreasing the pressure the blade exercises on the material to be cut out during said post-cut.
  • the blade will not be brought to a standstill for lifting and lowering the blade. In this way the entire path or the entire route can be travelled without accelerating or decelerating the blade, which will result in a great time saving.
  • the length of the pre-cut and post-cut must be long enough to give the blade the time to come out of or go into the material or to sufficiently decrease or increase the pressure it exercises.
  • said pre-cut and/or post-cut lie in the extension of the figure to be cut out.
  • Such method has the advantage that it prevents the moving blade from breaking when being lifted or lowered because lifting or lowering occurs during the post-cut and the pre-cut which can be made in the extension of the path of the figures.
  • the method comprises the step of lifting the blade out of the cutting plane, or decreasing the pressure the blade (4) exercises on the material (3) to be cut out after cutting out a figure or the like and after a possible post-cut, during the motion of the blade according to the section of the path to the next figure or the like to be cut out and of lowering the blade into the cutting plane, or increasing the pressure that the blade (4) exercises on the material (3) to be cut out before cutting out the next figure or the like and before possible pre-cut, during the motion of the blade according to said section of the path to the next figure to be cut out.
  • the blade is lifted and lowered in the path between two consecutive figures and in particular in the path between a possible post-cut and a pre-cut.
  • the method also relates to a device for performing a method according to the invention, characterised in that the device comprises one or more of the following components:
  • CAD-CAM stands for "computer-aided design - computer-aided manufacturing”.
  • the method according to the invention can be performed by a CAD-CAM or a driver, but also by a control unit of the cutting plotter.
  • the cutting plotter 1 schematically shown in figure 1 essentially comprises a cutting surface 2 on which a material 3 to be cut out can be mounted and a blade 4 which is mounted in a tool holder 5.
  • the tool holder 5 is controlled, for example by a computer or another control unit 6 which is schematically shown in figure 1 , to be moved over the cutting surface 2 according to a certain pattern.
  • the blade 4 can be lowered into a cutting plane 7, said cutting plane 7 being the plane in which the blade 4 can make a cut.
  • the blade 4 When the blade 4 is located in the cutting plane 7, it is in the cutting position and the blade is positioned perpendicular to said cutting plane 7. In said position the blade 4 can cut, or make a cut in the material 3 to be cut.
  • said cutting plane 7 coincides with the material 3 to be cut.
  • Said material 3 is for example, but not necessarily for the invention, paper.
  • Figure 2 shows a top view of the cutting plane 7 according to the arrow F2 in figure 3 , in which the material 3 to be cut, i.e. a sheet of paper, is visible, with a number of figures 8 to be cut out, which in this case, but not necessarily are pre-printed on the material 7.
  • the material 3 to be cut i.e. a sheet of paper
  • Controlling the cutting plotter 1 from figure 1 is as follows.
  • the method for controlling the cutting plotter 1 essentially comprises the following steps.
  • the blade 4 is put in the starting position a by moving the tool holder 5.
  • the starting position a is at point a.
  • the blade 4 is lowered into the cutting plane. This is indicated with the downward arrow at point a on figure 2 .
  • the blade 4 ends up in the starting position a shown by the circle at point a on figure 2 , this is the point where the cutting motion will start.
  • the blade 4 will progress in the cutting plane 7, and also above the cutting plane 7, according to a preset path 9 for cutting out the figures to be cut out.
  • the blade 4 will first cut out the section a - b - c - a of the path 9. Between the points a and d, the blade 4 in this case, but not necessarily for the invention, will progress above the cutting plane 7.
  • the blade 4 will perform a cutting motion again according to the cut d - e - f - d of the path 9. Between the points d and g, the blade 4 will progress again above the cutting plane 7, to subsequently, when it has reached point g, cut out the last triangle 8 according to path g - h - i - g.
  • the circles at points a, d and g represent the locations where the blade 4 starts and stops cutting in the material 3, the arrows next to said points represent the vertical motion of the blade 4, i.e. the motion according to a direction perpendicular to the cutting plane 7.
  • the entire path 9 that the blade travels is: a - b - c - a - d - e - f - d - g - h - i - g.
  • a - b - c - a; d - e - f - d and g - h - i - g are sections of the path 9 whereby a cutting motion is performed by the blade 4
  • a - d and d - g are sections of the path 9 whereby the blade 4 in this case, but not necessarily for the invention, progresses above the material 3.
  • the residual material and the cut out figures 8 can be removed from the cutting surface 2. Note that the residual material in this case is not cut through and therefore can be removed in one piece. Consequently it is easy to separate the residual material from the cut out figures 8.
  • the method comprises the step of lifting the blade 4 out of the cutting plane 7 during the motion of the blade 4 according to the section a - d, d - g of the path 9 to the next figure 8 or the like to be cut out after cutting out a figure 8 or the like and before cutting out the next figure 8 or the like, lowering the blade 4 again into the cutting plane 7 during the motion of the blade 4 according to said section a - d, d - g of the path 9 to the next figure 8 to be cut out.
  • Figure 3 shows a side view according to the arrow F3 in figure 1 , which shows how the blade 4 is lifted and lowered during the section a - d of the path 9. Analogously, this applies to the section d - g.
  • the blade 4 is lifted to subsequently, with a constant height h above the cutting plane 7, continue the path 9, whereby at the end of the motion the blade 4 is lowered again into the cutting plane 7, to be able to cut out the next figure 8.
  • a star in figure 3 shows up to what point the blade 4 rises and from which point the blade 4 will drop again. Between the two stars the blade 4 progresses at a constant height h.
  • the method comprises the step of adjusting the section a - d, d - g of the path 9 between two figures 8 or the like to be cut out such that the cutting direction at the start of said section a - d, d - g of the path 9 corresponds with the cutting direction of the path 9 at the end of a figure 8 or the like to be cut out and such that the cutting direction at the end of said section a - d, d - g of the path 9 corresponds with the cutting direction of the path 9 at the start of a next figure 8 or the like to be cut out.
  • the stars in figure 4 indicate up to which point the blade 4 rises and from which point the blade 4 will drop again, similar to what is shown in figure 3 .
  • Figures 5 and 6 show a method according to the invention, whereby the method comprises the step of making a pre-cut 10 and/or post-cut 11 in front of and/or behind every figure 8 or the like to be cut out.
  • a pre-cut 10 and post-cut 11 means that the blade 4 already starts cutting in the material 3 before the blade 4 starts cutting out the actual figure 8 and that the blade 4 still continues to cut in the material 3 after the figure 8 is cut out.
  • the pre-cut 10 and post-cut 11 will therefore be in the residual material.
  • the pre-cut 10 and post-cut 11 will each have the same cutting direction as the sections of the path 9 which coincide with the edges of the figures 8 to be cut out.
  • Making the pre-cut 10 or post-cut 10 at the start, respectively end of the path 9, has the advantage that the blade 4 can accelerate or decelerate in said pre-cut 10 or post-cut 11, such that the blade 4 has a constant speed, when it cuts out the figures 8 to be cut out.
  • the advantage of making pre-cuts 10 and post-cuts 11 during the path 9 is that it is possible to lower the blade 4 during said pre-cut 10 and/or lift the blade 4 during said post-cut 11.
  • the method according to figure 5 in which the pre-cuts 10 and/or post-cuts 11 are applied will also comprise this step.
  • the blade 4 can be moved according to the path above the cutting plane 7 or cutting surface 2, up to the next pre-cut 10.
  • the blade 4 no longer needs to be stopped between two figures 8 to be cut out, and the blade 4 cannot break during lifting or lowering.
  • Said pre-cuts 10 and post-cuts 11 can be used to bring the blade 4 to a standstill or to set it in motion again, such that the blade 4 can be moved between a pre-cut 10 and post-cut 11. Accelerating or decelerating the blade 4 therefore does not occur while cutting out the figures 8 themselves.
  • the blade 4 can also be lifted or lowered, consequently not only do the pre-cut 10 and post-cut become shorter 11, but also less time will be needed because the blade 4 does not have to be brought to a complete standstill.
  • the method comprises the step of calculating or simulating the best path 9, using computer software based on an algorithm to solve the travelling salesman problem, such that the time needed to cut out all figures 8 or the like, is minimal.
  • the method comprises the step of calculating the best path 8 based on artificial intelligence using data collected during previous cutting operations, data relating to the material 3 to be cut, data relating to the figures 8 to be cut out, and the like.
  • Such method is particularly useful if many similar cutting operations or cutting jobs have to be performed, such that the obtained information or data are usable and relevant for a next cutting operation.
  • the method comprises the step of dissecting the figures 8 to be cut out in different vectors, whereby each vector is considered a separate figure 8 to be cut out.
  • every triangle 8 can be dissected in its three sides, whereby each side is a so-called vector.
  • Such method offers many more degrees of freedom such that it permits many more possible options of paths 8, such that chances are that a faster, more efficient path 8 can be found.
  • Figures 7a and 7b show another alternative method, whereby the method comprises the step of choosing starting point a, d, g of every figure 8 to be cut out and/or choosing the order in which the figures 8 to be cut out are cut out such that the path 9 between two figures 8 does not cross a figure 8 to be cut out.
  • Figure 7a shows a method, whereby the starting point a, d, g and the order are not optimised.
  • the path 9 more specifically the sections a - d, d - g of the path 9 between two consecutive figures 8, runs through the figures 8 or the like to be cut out.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Cutting Processes (AREA)
EP21200890.8A 2020-10-07 2021-10-05 Verfahren zur steuerung eines schneidplotters und vorrichtung zur durchführung solch eines verfahrens Pending EP3981562A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE20205692A BE1028677B1 (nl) 2020-10-07 2020-10-07 Werkwijze voor het aansturen van een snijplotter en inrichting voor het uitvoeren van dergelijke werkwijze

Publications (1)

Publication Number Publication Date
EP3981562A1 true EP3981562A1 (de) 2022-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21200890.8A Pending EP3981562A1 (de) 2020-10-07 2021-10-05 Verfahren zur steuerung eines schneidplotters und vorrichtung zur durchführung solch eines verfahrens

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EP (1) EP3981562A1 (de)
BE (1) BE1028677B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2320564B1 (de) * 1973-04-21 1974-01-10 Krauss U. Reichert Spezialmaschinenfabrik, 7012 Fellbach Steuermuster-vorlage fuer koordinatenschneidmaschinen
US3838618A (en) * 1972-11-02 1974-10-01 Schubert & Salzer Maschinen Method and apparatus for controlling a cutting tool for cutting garment components from flat fabric
US3855887A (en) * 1972-12-11 1974-12-24 Gerber Garment Technology Inc Method for cutting pattern pieces from sheet material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838618A (en) * 1972-11-02 1974-10-01 Schubert & Salzer Maschinen Method and apparatus for controlling a cutting tool for cutting garment components from flat fabric
US3855887A (en) * 1972-12-11 1974-12-24 Gerber Garment Technology Inc Method for cutting pattern pieces from sheet material
DE2320564B1 (de) * 1973-04-21 1974-01-10 Krauss U. Reichert Spezialmaschinenfabrik, 7012 Fellbach Steuermuster-vorlage fuer koordinatenschneidmaschinen

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Publication number Publication date
BE1028677B1 (nl) 2022-05-09
BE1028677A1 (nl) 2022-05-02

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