EP4056336A1 - Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper - Google Patents

Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper Download PDF

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Publication number
EP4056336A1
EP4056336A1 EP21162323.6A EP21162323A EP4056336A1 EP 4056336 A1 EP4056336 A1 EP 4056336A1 EP 21162323 A EP21162323 A EP 21162323A EP 4056336 A1 EP4056336 A1 EP 4056336A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cut
cutting machine
item
feed saddle
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.)
Withdrawn
Application number
EP21162323.6A
Other languages
German (de)
English (en)
Inventor
Michael WOMBACHER
Frank Seidel
Oliver Krakow
Markus Judel
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.)
Adolf Mohr Maschinenfabrik GmbH and Co KG
Original Assignee
Adolf Mohr Maschinenfabrik GmbH and Co KG
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 Adolf Mohr Maschinenfabrik GmbH and Co KG filed Critical Adolf Mohr Maschinenfabrik GmbH and Co KG
Priority to EP21162323.6A priority Critical patent/EP4056336A1/fr
Publication of EP4056336A1 publication Critical patent/EP4056336A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B26D5/007—Control means comprising cameras, vision or image processing systems
    • 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
    • B26D7/016—Back gauges
    • 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
    • B26D1/06—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 wherein the cutting member reciprocates
    • B26D1/08—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 wherein the cutting member reciprocates of the guillotine type
    • 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces

Definitions

  • the invention relates to a cutting machine for cutting stacked, sheet-like material with a device for correcting the orientation of the material to be cut. Furthermore, the invention relates to a device for correcting the alignment of material to be cut for use with a cutting machine and a method for correcting an alignment of a stacked sheet material to be cut when using a cutting machine according to the invention.
  • the invention relates in particular to a cutting machine which is designed as a plane cutting machine and/or as a high-speed cutting machine.
  • a cutting machine having the features of the preamble of claim 1 is, for example, from EP 2 656 984 B1 known.
  • the cutting machine is designed as a plane cutting machine. This has a base frame which accommodates the table, and also a portal frame which is mounted in the base frame and in which the cutting blade is mounted. Before the cut, the sheet-like, stacked product lying on the table is pressed by means of a press bar against the surface of the table facing the stack, and the cut then takes place by means of the cutting blade.
  • the cutting machine In order to bring the material to be cut in the area of a cutting plane of the cutting blade of the cutting machine, the cutting machine has a feed saddle, this feed saddle being rotatable about a vertical axis and tiltable about a horizontal axis Alignment of the material to be cut to the cutting plane of the cutting knife. Furthermore, the cutting machine has means for rotating and tilting the feed saddle. The rotatability and tiltability of the feed saddle serves to correct any undercut or overcut in the material to be cut.
  • Such a correction of rotation or inclination of the feed saddle is currently carried out by the machine operator via a visual qualitative assessment of the sectional image of trimmed optical cutting marks and corresponding manual corrections of the rotary position or tilt position of the feed saddle carried out by the machine operator.
  • the object of the present invention is to develop a cutting machine that has the features of the preamble of patent claim 1 in such a way that this cutting machine enables reliable correction or alignment of the material to be cut with respect to the cutting plane. Furthermore, the object of the invention is to create a possibility of retrofitting an existing cutting machine with a system for automatically correcting the rotational position and/or tilting position of the feed saddle. Furthermore, the object of the invention is to specify an advantageous method for correcting an alignment of a stacked, sheet-like material to be cut when using the cutting machine according to the invention.
  • the cutting machine serves to cut stacked, sheet-like material.
  • the cutting machine has a table for receiving the material to be cut and a feed saddle for moving the material to be cut in the direction of a cutting plane of a cutting blade of the cutting machine.
  • the feed saddle can be rotated about a vertical axis and/or tilted about a horizontal axis for the purpose of aligning the material to be cut with the cutting plane of the cutting blade.
  • the cutting machine also has means for rotating and/or tilting the feed saddle, these means preferably being servomotors. According to the invention, it is provided that the cutting machine has a device for correcting the alignment of the material to be cut, the device having an electrical control device for actuating the means for rotating and/or tilting the feed saddle.
  • the device also has at least one sensor for optical inspection of a trimmed end face of the item to be cut after the cutting process has taken place.
  • the at least one sensor is set up to detect a pattern of the item to be cut that is formed by trimmed cutting marks and is visible from the front.
  • the control device is set up to determine deviations in the alignment of the material to be cut with respect to the cutting plane based on the detected pattern and to correct the alignment of the material to be cut with respect to the cutting plane by suitably controlling the means for rotating and/or tilting the feed saddle .
  • Deviations in the alignment of the material to be cut with respect to the cutting plane can be detected by detecting the pattern, which is formed by the trimmed cutting marks on the end face, since the pattern formed has characteristic features for the respective deviation. For example, if the inclination of the to-be-cut is not correct, this will show up in the pattern Guts or the feed saddle shows a characteristic change in the cross section of the pattern in the vertical direction of the stack. In this respect, a change in the cross section of the pattern in the vertical direction of the stack indicates an undercut or an overcut.
  • the term "overcut” is understood here to mean a cutting error in which the upper sheet is true to size in the cutting position and the lower sheets are too long after the cut.
  • undercut cutting error
  • a mismatch in the cross-sections of the two patterns indicates that the stack to be cut is misaligned in orientation with respect to rotation about an axis perpendicular to a normal axis of the table. Such alignment can be corrected by rotating the feed saddle about the vertical axis.
  • the solution according to the invention reduces the time required for the correction settings and reduces errors when making the correction settings of the feed saddle.
  • the cutting machine is preferably a cross cutter, in particular a guillotine cutter, particularly preferably a high-speed cutter.
  • the cutting machine has a press beam. Furthermore, it is considered particularly advantageous if the optical inspection takes place in a state in which the press beam is pressed against the material to be cut.
  • cut marks is to be interpreted broadly in the present case.
  • the cutting marks are preferably additional markings, preferably exclusively, for the purpose of determining the orientation of the feed saddle or to determine the orientation of the material to be cut on the respective sheet or sheet of material to be cut is applied.
  • These cutting marks can certainly be marks that mark the point at which the sheet is to be cut to form the stack of blanks.
  • the cutting marks are formed by the motif to be cut printed on the respective sheet itself.
  • the cutting marks preferably have a cross-section that changes in the feed direction of the feed saddle.
  • control device is set up to evaluate the pattern detected by the sensors with computer support and/or to calculate the necessary correction of the angle of inclination and/or the angle of rotation with computer support.
  • the senor prefferably has further elements of the measurement chain and/or evaluation chain in addition to the actual measured value recorder, in particular also to carry out further processing of the measured variable recorded and forward these further processed measured variables to the control device. It is also entirely conceivable that the control device and the sensor form part of a sensor device.
  • control device forms a separate component.
  • control device can be arranged largely independently of the cutting machine or can be arranged at different points on the cutting machine. It is quite conceivable that the control device is spatially separated from the cutting machine.
  • the control or the signal transmission takes place wirelessly.
  • the device preferably has a plurality of sensors, the sensors being set up to inspect different areas of the trimmed end face, in particular to inspect areas spaced apart in a transverse direction.
  • the cutting machine has only one sensor for the optical inspection of the end face, with this sensor being movable in the transverse direction and/or in the vertical direction in order to optically inspect different areas of the end face.
  • This is particularly advantageous when the cutting marks are formed in different areas of the trimmed end face, for example spaced apart in the transverse direction.
  • the mobility of the at least one sensor means that the patterns formed by these cutting marks can be detected independently of the arrangement of the cutting marks on the sheet.
  • the cutting machine is able to detect the patterns formed by the cutting marks, independently of the spatial arrangement of the cutting marks.
  • the at least one sensor is arranged on the side of the table that is used to receive the cut product.
  • Such an area of the table is often referred to as the front table.
  • the area of the table located on the other side of the cutting plane is typically referred to as the back table.
  • the at least one sensor is preferably arranged above the item to be cut or above the table.
  • the at least one sensor is mechanically connected to the cutting machine, preferably to a portal frame Cutting machine is mechanically connected.
  • the portal frame is used to mount the cutting blade.
  • the sensor is preferably an image sensor, it being provided in particular that this image sensor is part of a camera or a camera system. In this respect, it is preferred if the cutting machine has a camera, with this camera having the at least one sensor.
  • the device has additional lighting means for illuminating the front edge.
  • control device is set up to calculate the necessary correction of the angle of inclination based on a change in the cross section of the detected pattern in the vertical direction of the item to be cut and/or the control device is set up to calculate the necessary correction of the angle of rotation based on of a comparison of the cross-sections of two transversely spaced detected samples.
  • control device is integrated into a machine control of the cutting machine.
  • This machine control serves in particular to control the cutting process of the cutting machine with the cutting blade and/or to control the movement of the feed saddle in the direction of the cutting plane.
  • the cutting machine has at least one additional sensor for optical inspection of an upper side of the item to be cut in the area of the cutting plane, the control device being set up to control means for displacing the feed saddle in the direction of the cutting plane of the cutting blade in such a way that the feed saddle is shifted in such a way that a printed area, in particular the cutting mark, is arranged in the area of the cutting plane.
  • the device according to the invention for correcting the alignment of a stacked, sheet-like product to be cut is used with a cutting machine known from the prior art for cutting the product.
  • the device serves in particular to retrofit existing cutting machines with this device for correcting the alignment of the stacked, sheet-like material to be cut.
  • the cutting machine with which the device is to be used has a table for receiving the material to be cut and a feed saddle for displacing the material to be cut in the direction of a cutting plane of a cutting knife of the cutting machine.
  • the feed saddle can be rotated about a vertical axis and/or tilted about a horizontal axis in order to align the material to be cut with the cutting plane of the cutting blade.
  • the cutting machine has means for rotating and/or tilting the feed saddle.
  • the device according to the invention has an electronic control device, the control device being set up to control the means for rotating and/or tilting the feed saddle, the device having at least one sensor for optically inspecting a trimmed end face of the item after the cutting process has taken place.
  • the at least one sensor is set up to detect a pattern formed by trimmed cutting marks and visible from the front, the control device being set up to determine deviations in the alignment of the item to be cut with respect to the cutting plane based on the detected pattern.
  • the control device is set up to adjust the orientation of the material to be cut with respect to the through a suitable control of the means for rotating and / or tilting the feed saddle to correct the cutting plane.
  • the cutting machine has a side stop for the material to be cut.
  • process steps a) to e) are repeated at least once. In this way, the corrections made are checked and any overcorrections can be corrected in turn.
  • the method is also suitable for correcting deviations in the printed image of the respective sheet with regard to the exact alignment of the printed image on the respective sheet. It is thus quite conceivable that the printed area on the respective sheet of the sheet is positioned somewhat rotated relative to a front edge and/or side edge of the respective sheet. With exact alignment of the stack with regard to the front edge or side edge of the respective sheet to the cutting plane, the motif printed on it would still not be cut exactly.
  • the cutting machine according to the invention, the device and the method also enable the alignment of the stack to be corrected such that the printed area is aligned exactly with the cutting plane.
  • the 1 shows a cutting machine 1 according to the invention for cutting of stacked, sheet-like Good 2 is used.
  • the flaky material is in particular sheets of paper, cardboard, foil or the like.
  • the material 2 to be cut is present in the form of a cuboid. A top of each sheet of the material to be cut 2 is in the figure 5 shown.
  • the cutting machine 1 has a table 3 with an upper, horizontal table surface 12 .
  • the table surface 12 extends perpendicularly to the plane of the drawing sheet, thus in or parallel to the XY plane.
  • a cutting blade 6 that can be lowered and lifted is mounted in a portal frame, not shown in detail, with a press beam 8 in front of the cutting blade 6 in the feed direction X, also in the portal frame, being mounted so that it can be raised and lowered.
  • the press bar 8 is used to fix the material to be cut 2 by the press bar 8 in the lowered position, as shown in FIG 1 is shown, the stack of items to be cut 2 against the table 3 presses.
  • the cutting blade 6 In swing cutting, the cutting blade 6 can be moved from an upper end position to a lower end position by means of a crank operation, not shown in detail, in which it penetrates into a cutting strip 9 held by the table 3 .
  • the 1 shows the cutting blade 6 in a state between the first end position and the second end position.
  • the cutting knife 6 is mounted in a so-called knife bar 7 of the cutting machine 1, this knife bar 7 being movable from the first end position to the second end position and serving to transmit the cutting movement to the cutting knife 6.
  • a feed saddle 4 which has a front rake section 10 .
  • This rake section 10 rests against the stacked item 2 to be cut.
  • the feed saddle 4 serves to shift the material 2 to be cut in the direction of a cutting plane 5 of the cutting blade 6.
  • the cutting plane 5 lies in or parallel to the YZ plane.
  • the feed saddle 4 is rotatable about a vertical axis 13 for aligning the material to be cut 2 to the cutting plane 5 of the cutting knife 6, as this schematically indicated by arrow 23 in FIG 3 is made known. Furthermore, the feed saddle 4 can be tilted about a horizontal axis 14 in order to align the material 2 to be cut with the cutting plane 5 of the cutting blade 6, as indicated schematically by the arrow 24 in FIG 4 is made known.
  • the cutting machine 1 has means, not shown, for turning and tilting the feed saddle 4 .
  • the cutting machine 1, more precisely the table 3, has two opposite side stops 22, which serve to support the material 2 to be cut.
  • the material to be cut 2 can be aligned manually by means of a straightedge 11 , in particular pressed against one of the side stops 22 .
  • the cutting machine 1 has a device for correcting the orientation of the material 2 to be cut, the device having an electronic control device 15 for controlling the means for rotating and tilting the feed saddle 4 .
  • the device has two cameras, with each camera having an image sensor 17 for the optical inspection of a trimmed end face 18 of the item 2 to be cut after the cutting process has taken place.
  • the two cameras can be moved in the transverse direction Y and are connected to the cutting machine 1, in this case the portal frame, by means of a bearing structure 20.
  • the respective sheet of the material to be cut 2 has two cutting marks 16, as is shown schematically in FIG figure 5 is shown.
  • the respective cutting mark 16 has a cross section that changes in the feed direction X of the feed saddle 4, the cross section changing in the present case in steps.
  • the steps of the cutting mark 16 are only fractions of a millimeter apart from one another, with the distance between the respective step and the next step being approximately 0.1 mm in the present case.
  • the cutting plane 5 of the cutting blade 6 is shown schematically, which in the present case is such that the cutting blade 6 would penetrate the respective sheet of the material 2 in the area of the cutting marks 16 during a cut.
  • Figures 6 to 9 When a cut is made through the area of the respective cutting mark 16, a pattern 19 formed by the trimmed cutting marks 16 and visible from the front is obtained Figures 6 to 9 for two cutting marks 16 spaced apart in the transverse direction Y.
  • the Figures 6 to 9 each show two areas of the trimmed end face 18 of the material to be cut 2 spaced apart in the Y-direction
  • Figures 6 to 9 a multiplicity of sheets stacked one on top of the other in the Z-direction, which form the material 2 to be cut.
  • the individual sheets usually several hundred to several thousand sheets stacked on top of one another, are in the Figures 6 to 9 not resolved.
  • FIGS Figures 10 and 11 exemplarily in each case a photograph of a region of a trimmed end face 18 of an item 2 to be cut with a pattern 19 formed by trimmed cutting marks and visible on the end face figure 11 there is an incorrect alignment of the material 2 to be cut with respect to the cutting plane 5, namely an inclination error.
  • the two cutting marks 5 form identical patterns 19. Furthermore, the respective pattern 19 does not show any cross-sectional changes in the vertical direction Z of the material to be cut 2.
  • the image sensors 17 or the cameras are set up so that the front side detect visible patterns 19.
  • the Figures 6 to 9 show the detected patterns 19 in the form of an image.
  • the control device 15 is set up to determine, based on the detected pattern 19, deviations in the orientation of the material to be cut 2 with respect to the cutting plane 5 and by suitably controlling the means for rotating and/or tilting the feed saddle 4 to determine the orientation of the material to be cut 2 with respect to the cutting plane 5 to be corrected.
  • the Figures 7 to 9 show pattern 19 in case of deviations from the exact one Alignment of the material to be cut 2 with respect to the cutting plane 5.
  • the 7 12 shows a faulty alignment, this faulty alignment consisting in the fact that the material 2 to be cut is twisted with respect to the cutting plane 5 with respect to the axis 13 .
  • the one in the 7 shown cutting patterns 19 formed by identical cutting marks 16 are different in their extension in the Y direction, wherein in the 7 pattern 19 shown on the left is narrower than that in FIG 7 pattern 19 shown on the right.
  • the cutting knife 6 does not penetrate the cutting mark 16 forming the respective pattern 19 in identical areas, but penetrates the cutting mark 16 forming the left pattern 19 in an area in which the Cutting mark 16 has a relatively small extent in the Y direction, and the cutting mark 16 forming the right pattern 19 penetrates in an area in which the cutting mark 16 has a relatively large extent in the Y direction.
  • the alignment of the material 2 to be cut can be corrected by rotating the feed saddle 4 about the axis 13 .
  • the 8 12 shows another incorrect alignment, this incorrect alignment consisting in the fact that the material 2 to be cut is twisted with respect to the cutting plane 5 with respect to the axis 14 insofar as its inclination is not correct. Accordingly, the alignment can be corrected by tilting the feed saddle 4 about the axis 14 .
  • the respective pattern 19 has a cross section that changes stepwise in the vertical direction Z. This change in the cross section results from the fact that the cutting blade 6 penetrates the upper sheets of the material to be cut 2 in an area in which the cutting mark 16 has a relatively large extent in the Y direction, and that the cutting blade 6 penetrates lower sheets of the material to be cut 2 penetrates in an area in which the cutting mark 16 has a relatively small extent in the Y-direction.
  • the 9 shows a combination of a pitch and a rotation error.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Control Of Cutting Processes (AREA)
EP21162323.6A 2021-03-12 2021-03-12 Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper Withdrawn EP4056336A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21162323.6A EP4056336A1 (fr) 2021-03-12 2021-03-12 Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21162323.6A EP4056336A1 (fr) 2021-03-12 2021-03-12 Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper

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EP4056336A1 true EP4056336A1 (fr) 2022-09-14

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EP21162323.6A Withdrawn EP4056336A1 (fr) 2021-03-12 2021-03-12 Machine de coupe permettant de couper des marchandises empilées en forme de feuilles dotée d'un dispositif de correction de l'alignement des marchandises à couper

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4414146A1 (fr) * 2023-02-13 2024-08-14 POLAR-Mohr Beteiligungs GmbH Procédé de correction d'une orientation d'une position de coupe et machine de coupe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391435A1 (fr) * 1989-04-07 1990-10-10 Franc Gergek Mécanisme détecteur pour un coupe-papier
EP2656984B1 (fr) 2012-04-27 2015-02-25 Adolf Mohr Maschinenfabrik GmbH & Co. KG Système de coupe avec machine à découper et un dispositif d'alignement
DE102017112754A1 (de) * 2017-06-09 2018-12-13 Baumann Maschinenbau Solms Gmbh & Co. Kg Verfahren zum Schneiden von Bögen sowie Schneidmaschine
US10280564B2 (en) * 2014-09-26 2019-05-07 Opensoft, Inc. Cutting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391435A1 (fr) * 1989-04-07 1990-10-10 Franc Gergek Mécanisme détecteur pour un coupe-papier
EP2656984B1 (fr) 2012-04-27 2015-02-25 Adolf Mohr Maschinenfabrik GmbH & Co. KG Système de coupe avec machine à découper et un dispositif d'alignement
US10280564B2 (en) * 2014-09-26 2019-05-07 Opensoft, Inc. Cutting machine
DE102017112754A1 (de) * 2017-06-09 2018-12-13 Baumann Maschinenbau Solms Gmbh & Co. Kg Verfahren zum Schneiden von Bögen sowie Schneidmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4414146A1 (fr) * 2023-02-13 2024-08-14 POLAR-Mohr Beteiligungs GmbH Procédé de correction d'une orientation d'une position de coupe et machine de coupe

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