tool holder device and marking system, corresponding marking process

Abstract

A portable tool-holding device 1, comprising a longitudinal body, a first element 3 pivoting about a first axis AA', on which is mounted eccentrically a second element 4 pivoting about a second axis BB' parallel to the first axis AA', on which is mounted eccentrically a third element 5 receiving a marking tool 6, said device 1 comprising at least two motor assemblies and transmission means 7, 8 capable of actuating the first and / or second element 3, 4, the at least two motors 70, 80 being longitudinal, parallel to each other, and offset from said elements 3, 4, 5. A marking system comprising such a device 1 equipped with a tool 6. A method for marking a corresponding pattern. A scarifier formed by such a device 1 equipped with a blade. A scarifying system comprising such a scarifier. A corresponding scarification method. Drawing: Fig 2

Description

Title of the invention: tool holder device and marking system, corresponding marking method

[0001] The technical field relates to that of manual devices and systems enabling the maintenance and use of a marking tool and the methods of implementing such a device.

[0002] The invention is of particular interest in the field of surface scarifiers for testing the adhesion of a coating on a flat or uneven surface in whole or in part, and in the field of methods for implementing such a scarifier.

[0003] The invention is of particular interest in the field of instruments used to carry out tests of the resistance of a coating, for example a paint, a metallic or organic layer deposited by any means, for example by electrolytic deposition, by galvanic or electrolytic deposition, by spraying with a paint gun or by plasma spraying on a support, particularly in the field of the manufacture of plastic or metallic parts.

[0004] In order to check that a coating adheres to a support, for example a metallic or plastic support, it is known to carry out a test called the scotch tape test.

[0005] A standardized grid is created using a known method, in accordance with a standard such as ASTM D3002, ASTM D3359, or ISO 2409, with a utility knife blade that cuts through the paint layer, and a standardized adhesive strip is applied over it. By removing the adhesive strip, the number of squares that detach from the grid is checked to see if the paint is coming off or not.

[0006] The operator, in order to carry out the grid, makes a defined number of at least one notch, or even at least two notches, in particular parallel to each other, on the surface of the part to be tested, then rotates, for example, by a quarter turn, the surface of the part to be tested to make a defined number of at least one other notch, or even at least two notches, in particular parallel to each other and perpendicular to the first notches made or making a defined angle, for example, 25 degrees or 45 degrees.

[0007] The spacing of the parallel lines forming the grid can be in a standardized manner from 1 to 3 millimeters.

[0008] A technician making this grid must therefore be precise and press hard on the cutter blade in a regular and identical manner.

[0009] This tape test must be repeated throughout production, making this work repetitive and tedious, a source of musculoskeletal disorders, and requiring great concentration.

[0010] It is known to use a plate with several blade guide lights or grid combs with several blades to facilitate tracing, but the movements remain repetitive and the formation of musculoskeletal disorders persists.

[0011] It is known to remedy this by using electric scarifying machines.

[0012] These machines are in the form of a tool placed on a table, comprising on one side an arm continuing into a head with a knife, and on the other side a base for positioning a piece to be scarified.

[0013] Electric motors allow the arm to move forward and backward, up and down, and the head to shift to the right and left to make the knife make parallel lines.

[0014] A motor allows the base to be rotated by a determined angle, for example by 90°, to repeat the scarification operation and thus form a grid as described above.

[0015] These scarifying machines are heavy, bulky, and slow.

[0016] Furthermore, they require a prior operation of cutting a piece to be scarified bulky in a portion suitable for placement on the positioning base.

[0017] In addition, a part or portion of a part with curved surfaces is difficult to scarify with this type of scarifying machine.

[0018] This particular problem specific to the tape test to check the adhesion of a coating on a part is found more generally when one wants to make a marking on a part.

[0019] Thus, in addition to a grid with a blade, it may be envisaged to want to engrave or scratch a pattern on a piece with a metal point, a circular blade, a knife, a cutter blade or any other engraving tool.

[0020] Alternatively, consideration may be given to drawing a pattern on a piece with a pencil or a felt-tip pen or any other tool enabling the drawing of a pattern.

[0021] Thus, document US20220184798A1 presents a robotic arm comprising a static base, on which a first element pivots in rotation around a first axis, with at the end of this first element a second element pivoting around a second axis parallel to the first axis, and with a tool holder mounted eccentrically on this second element, said tool holder extending parallel to the first and second axes.

[0022] This robotic arm is heavy and bulky and must be placed on a support.

[0023] It includes, in a known manner, means for driving the first and second elements in the form of motor blocks placed at the level of said elements at the level of the axes of rotation.

[0024] Due to the length of the elements, any sudden movement is amplified and it is difficult to handle the tool precisely and repeatably.

[0025] Furthermore, the motors at the element level increase the offset weight of the elements relative to their respective axes, creating imbalances. It is therefore necessary to make the elements more structurally rigid or to compensate for the offset weight, which increases the weight of the robotic arm and the overall inertia. This makes the precise reproduction of a small pattern difficult and uncertain during high-speed movements.

[0026] This is particularly the case for complex patterns with several lines such as grids.

[0027] To remedy this, it is then necessary to ensure precise assemblies of parts exhibiting a high degree of precision, with precise, lightweight and efficient motors, which is costly.

[0028] This robotic arm does not allow for the inexpensive, simple, rapid and repeatable marking of a few millimeters to a few centimeters on a side on a part having any shape.

[0029] It is also bulky and unwieldy, difficult to transport.

[0030] In fact, there is no handy, lightweight and compact tool-carrying device that allows for the simple, rapid and repeatable marking of a pattern of a few millimeters to a few centimeters on a side on a surface of a part, whether it is flat or curved in whole or in part.

[0031] One objective of the invention is to provide a handy, lightweight and compact tool holder device, allowing for simple, rapid, precise and repeatable marking of a pattern of a few millimeters to a few centimeters on a side on a surface of a part, whether it is flat or curved in whole or in part.

[0032] One objective of the invention is to provide a pattern marking system comprising such a tool holder device equipped with a marking tool allowing to make a pattern marking of a few millimeters to a few centimeters on a side simple, fast and precise and repeatable on a surface of a part, whether it is flat or curved in whole or in part.

[0033] It is also an objective of the invention to propose a method of marking a pattern, in particular from a few millimeters to a few centimeters on a side, on a surface of a part, whether it is flat or curved in whole or in part.

[0034] It is also an objective of the invention that the use of such a tool holder device does not cause musculoskeletal disorders to a user of such a tool holder device.

[0035] It is also an objective of the invention to provide, more specifically, a handy, lightweight and compact scarifier, making it possible to create simply, quickly, precisely and repeatably a standardized grid of a few millimeters to a few centimeters on a side on a surface of a room, whether flat or curved in whole or in part, to carry out a standardized tape test without having to cut out a portion of said piece.

[0036] It is also an objective of the invention to propose a scarifying system allowing a standardized grid of a few millimeters to a few centimeters on a side to be made on a surface of a part, whether it is flat or curved in whole or in part, to carry out a standardized tape test, without having to cut out a portion of said part.

[0037] It is also an objective of the invention to propose a standardized grid method of a few millimeters to a few centimeters on a side on a surface of a part, whether it is flat or curved in whole or in part, to carry out a standardized tape test.

[0038] To this end the invention relates to a portable tool holder device, comprising a longitudinal body with a handle, a first element pivoting about a first axis, first element on which is mounted eccentrically a second element pivoting about a second axis parallel to the first axis, second element on which is mounted eccentrically a third element suitable for receiving a tool having a marking end, the tool holder device also comprising at least two motor assemblies and transmission means suitable for rotating at least the first and / or second element.

[0039] Advantageously, the at least two motors of the at least two motor and transmission means assemblies are mounted side by side longitudinally in the body, parallel to each other, and offset from the first, second and third elements.

[0040] This makes it possible to reduce the overall size while ensuring rotation of the first and / or second element.

[0041] Thus, it is possible to propose a tool-carrying device which is portable and capable of moving a tool on a disc perpendicular to the first axis to mark a pattern inscribed in the surface of said disc, by varying the angular position of the first and / or second element, which causes the marking end of the tool to follow a chosen trajectory.

[0042] It should be noted that by acting on the angular position of the first and / or second element, it is possible to generate a trajectory comprising one or more straight portions.

[0043] This trajectory can be complex and include, alone or in combination, one or more straight parts, one or more curved parts, one or more angles, etc...

[0044] Thus, it is possible to form a grid pattern in a single operation, without having to move the tool holder device or rotate it a quarter turn to make perpendicular lines.

[0045] The at least two motors are stationary relative to each other and to the body of the tool holder, and they are offset from the first, second, and third elements, which reduces the inertia of the moving parts. Thus, they can rotate at high speed to accelerate marking without compromising marking accuracy.

[0046] This type of motor is inexpensive because it is standard, which makes the tool holder device economical.

[0047] The motors can in particular be placed laterally in relation to the first, second and third elements and perpendicular to the first axis.

[0048] The motors can alternatively be placed laterally with respect to the first, second and third elements and parallel to the first axis.

[0049] This tool holder device may include peripheral support pins, in particular at least two, preferably but optionally three, configured to bear against a surface to be marked when a user positions the tool holder device equipped with a tool opposite a surface to be marked. These support pins may have a rough, adhesive, or claw-like free end to ensure better grip against the surface against which they bear. Thus, the user of the tool holder is assured of the tool holder's stability and correct distance from the surface to be marked and can easily hold it effortlessly while the tool marks a pattern on the surface of the workpiece.

[0050] According to one feature of the invention, the third element is mounted pivotally relative to the second element along a third axis parallel to the first axis, and the third element includes a receiving member configured to receive the tool.

[0051] The pivoting can be done freely, according to the trajectory followed.

[0052] The pivoting can also be controlled by an additional motor and transmission means assembly, installed at the level of the third element or juxtaposed longitudinally in the body of the tool holder device, parallel to the other motor and transmission assemblies.

[0053] According to a feature of the invention, said organ is configured so that the marking end of the tool is eccentric with respect to the third pivot axis.

[0054] According to an alternative feature of the invention, said member is configured so that the marking end of the tool is centered with respect to the third pivot axis.

[0055] According to a feature of the invention, the receiving member of the third element comprises elastic return means capable of moving in translation a tool which said third element receives parallel to the first axis between a so-called rest position and a so-called withdrawal position of said tool in said third element.

[0056] This allows a tool mounted in the tool holder device to be in contact with a surface of a part to be marked even if that surface is warped.

[0057] According to a feature of the invention, the receiving member of the third element comprises means for translating the tool capable of controlling in translation a tool which said third element receives parallel to the first axis between a position called rest and a position called withdrawal of said tool in said third element.

[0058] This makes it possible to create a discontinuous pattern with device 1.

[0059] According to a feature of the invention, the distance between the first axis and the second axis corresponds to the distance between the second axis and the third axis.

[0060] This makes it possible to create a pattern over the entire surface of a disc, even in the center of said disc, by allowing a trajectory of a tool mounted on this tool-carrying device to pass through the pivoting center through which the first axis passes.

[0061] According to one feature of the invention, the tool-carrying device is equipped with a blade enabling the formation of a grid by scratching or scarifying, said tool-carrying device forming a scarifier.

[0062] This scarifier is portable, easy to handle, light and compact, allowing for simple, quick, precise and repeatable creation of a standard grid of a few millimeters to a few centimeters on a side on a surface of a room, whether flat or curved in whole or in part, to carry out a standard tape test.

[0063] The invention also relates to a pattern marking system comprising a tool-holding device as described above and equipped with a marking tool, said system comprising: - means of calculating the corresponding trajectory of the marking tool to form a defined pattern, - means of calculating the movements of the first, second and third elements of the tool-holding device, enabling the marking tool to follow the calculated trajectory, - means for calculating the actuation steps of at least two motors of the tool holder device, enabling the marking tool to follow the calculated trajectory, - means for recording the actuation steps of at least two motors of the tool holder device in a recording medium of the tool holder device, - means of transmitting the actuation steps recorded to the tool holder device.

[0064] According to one feature of the invention, the marking system comprises a tool-holding device equipped with a blade enabling the formation of a grid by scratching or scarifying, said marking system forming a scarifying system.

[0065] The invention also relates to a method for marking a pattern, in particular a few millimeters to a few centimeters on a side, on a surface of a part, whether flat or curved in whole or in part, characterized in that it comprises the following steps: - Determination of a pattern to be marked on a surface of a part by implementing a marking system with the characteristics described above, - implementation of software in a computer unit for calculating the corresponding trajectory of the marking tool, - implementation of software in a computer unit for calculating the movements of the first, second and third elements of the tool holder device, allowing the marking tool to follow the calculated trajectory, - implementation of software in a computer unit for calculating the actuation steps of at least two motors of the tool holder device, enabling the marking tool to follow the calculated trajectory, - recording of the actuation steps of at least two motors of the tool holder device in a recording medium for the tool holder device, - implementation of the actuation of at least two motors of the tool holder device by a control unit of the tool holder device according to the actuation steps of at least two motors of motor assemblies and transmission means of the tool holder device recorded in a recording medium of the tool holder.

[0066] According to a feature of the invention, the calculation steps of the process incorporate consideration of at least one clearance parameter of the motor assemblies and transmission means of the tool-carrying device implemented in this process.

[0067] This allows taking into account an existing play, for example when changing from a clockwise to a counterclockwise rotation or vice versa of a set of motors and transmission means.

[0068] According to one feature of the invention, the method comprises steps for determining at least one clearance parameter of the motor assemblies and transmission means of the tool-carrying device, in particular: - activation of at least two motors of the tool-holder device to form a pattern of predetermined dimensions on a flat surface, - measurement of the dimensions of said engraved motif, - implementation of software in a computer unit for calculating at least one parameter of the play of the sets of motors and transmission means of the tool holder device from the variations between the measured dimensions of the marked pattern and the predetermined dimensions of said pattern.

[0069] This makes it possible to simply measure the existence of one or more games, which may ap- appear or change over time.

[0070] The invention relates to a method of scarifying a surface of a part, characterized in that it comprises the steps of the marking process described above, and in that the tool-holding device of the marking system is equipped with a blade enabling the formation of a grid by scratching or scarification.

[0071] Other objects and advantages of the present invention will become apparent from the following description, which refers to the accompanying drawings illustrating exemplary embodiments and in which:

[0072] [Fig-1] is a schematic front perspective view of a tool-holding device according to the invention, in which a tool in the form of a blade is installed, seen from below.

[0073] [Fig.2] is a partial schematic view of parts of the tool-holding device of the [Fig.l], seen from below in perspective, without longitudinal body 2, showing part of the motor assemblies and transmission means and the first, second and third elements of the device, equipped with a blade.

[0074] [Fig.3] is a partial schematic view of the front of the device mechanisms tool holder of [Fig.2] seen from below in perspective, without longitudinal body.

[0075] [Fig.4] is a partial schematic view of the front of the device mechanisms tool holder of [Fig.3] seen from below in perspective, without drive wheel of the first element.

[0076] [Fig. 5] is a partial schematic view of the front of the device mechanisms tool holder of [Fig.4] seen from below in perspective, without upper part of the first element.

[0077] [Fig.6] is a schematic diagram, side view, of the transmissions of the first, second and third elements of the device in [Fig.1].

[0078] [Fig.7] is a schematic diagram seen from below and perpendicular to the axes of rotation of the first, second and third elements of the device of the [Fig.6].

[0079] The invention relates to a tool-holding device 1, hereinafter referred to as "device 1". Device 1 comprises a front, a rear, a top and a bottom.

[0080] With reference to the figures, the tool-holding device 1 is considered in a working position.

[0081] Thus, as illustrated in [Fig.1], the front of the tool holder device 1 is to the right of [Fig.1], and the rear of the tool holder device 1 is to the left of [Fig.1], the bottom of the tool holder device 1 is at the bottom of [Fig.1], and the top of the tool holder device 1 is at the top of [Fig.1].

[0082] Figures 1 to 5 partially show device 1 in isometric view from below.

[0083] The device may include a longitudinal body 2, hereinafter also referred to as "body 2", extending from the rear to the front along a longitudinal axis OO'.

[0084] This body 2 can be formed into several pieces.

[0085] The body 2 can form a handle, or include a part forming a handle, allowing a user to hold device 1 in one hand, and making device 1 portable.

[0086] The body 2 is open on the underside, revealing a first element 3, a second element 4 and a third element 5.

[0087] In fact, the first element 3 is in the form of a cylinder pivoting around a first axis AA'.

[0088] This first axis AA' can extend in the up / down direction of device 1.

[0089] The second element 4 is mounted eccentrically with respect to the first axis AA', pivoting relative to the first element 3 around a second axis BB' parallel to the first axis AA' and distinct from it.

[0090] The second element 4 extends downwards from the first element 3.

[0091] The second element 4 is in the form of an arm extending from a pivot part around the second axis BB up to a free end on which is mounted eccentrically with respect to the second axis BB' the third element 5.

[0092] The third element 5 may include a receiving member for a tool 50, here a housing for receiving a marking tool 6, having a marking end 60, here the marking tool 6 having a flat base from which extends downwards a pointed blade with a cutting edge inclined at 30 degrees.

[0093] The marking tool 6 is also referred to below as "tool 6".

[0094] The third element 5 can pivot around a third axis CC' relative to the end of the arm of the second element 4.

[0095] The marking end 60 of the tool 6, here the blade tip, can be centered so that the third axis CC' passes through the tip of the marking end 60, here the blade tip.

[0096] Alternatively, the marking end 60 of the tool 6, here the blade tip, can be offset with respect to the third axis CC'.

[0097] The pivoting of the first element 3 can be done by the actuation of a first motor and transmission means assembly 7, comprising a first motor 70 and first transmission means 71 of a rotational movement of a shaft of said first motor 70 to the first element 3.

[0098] Thus a rotation of the shaft of the first motor 70 causes the rotation of the first element 3 around the first axis AA'.

[0099] The pivoting of the second element 4 is done by the actuation of a second motor and transmission means assembly 8, comprising a second motor 80 and second transmission means 81 of a rotational movement of a shaft of said second motor 80 to the second element 4.

[0100] Thus a rotation of the shaft of the second motor 80 causes the rotation of the second element 4 around the first axis AA'.

[0101] The at least first motor 70 and second motor 80 are mounted side by side longitudinally in the body 2, immobile and parallel to each other, one above the other, and offset from the elements 3,4.

[0102] The two motors 3,4 can in particular be placed laterally with respect to the elements 3,4,5 and perpendicular to the first axis AA'.

[0103] The first and second transmission means 71,81 can be encircled by a housing 10 of the device 1.

[0104] The first and second transmission means 71,81 may each include a worm gear, and they may include epicyclic gears and / or trains.

[0105] The first and second worm screws 710, 810 are tubular, they are fitted and made rotationally fixed with the shafts of the first and second motors 70, 80 respectively, for example by a key engaged in grooves of a shaft and of the worm screw 710, 810 opposite.

[0106] The first and second worm gears 710, 810 cooperate respectively with first and second gear wheels 711,811.

[0107] The first gear 711 is rotationally fixed with the first element 3.

[0108] The second gear 811 is rotationally fixed with a gear shaft 812, having teeth on its periphery, and carried by the first axis AA'. The teeth of this gear shaft 812 cooperate with teeth of a gear that is rotationally fixed with a drive shaft 813 carried by the second axis BB' and rotationally fixed with the second element 4. This drive shaft 813 is in a slot cut into the first element 3, and is engaged on one side in a bearing of the first element 3 and on the other side in a bearing of the second gear 811, allowing it to pivot relative to the first element 3 and the second gear 811.

[0109] The pivoting of the third element 5 can be free in rotation, for example the third element 5 can be mounted inside a ball bearing, said ball bearing being housed in a hole in the second element 4.

[0110] Alternatively, the pivoting of the third element 5 can be done by the actuation of a third motor and transmission means assembly, comprising a third motor and third means of transmitting a rotational movement from a shaft of said third motor to the third element 5.

[0111] Said third motor can be mounted longitudinally side by side in the body 2, fixed and parallel with respect to the first and second motors 70, 80 and offset with respect to the elements 3, 4, 5.

[0112] Said third transmission means may include a wheel gear and a worm gear.

[0113] A third tubular worm screw can be fitted and made rotationally fixed with the third motor, for example by a key engaged in grooves of a shaft and of the opposite worm screw.

[0114] The third worm gear can cooperate with a third toothed wheel which can drive a gear system similar to that driving the second element 4 and configured to drive the third element 5, comprising a central axis carried by the first axis AA'.

[0115] The third transmission means may include gears and / or epicyclic trains.

[0116] In the body 2, above and below the first element 3, the toothed shaft 812 and optionally the third transmission means of the ball bearings may be present, configured to allow free rotation around the axis AA' of the first element 3, the toothed shaft 812 and optionally the third transmission means.

[0117] The device 1 includes means for actuation of at least two motors 70, 80 in the form of a control unit 21 comprising recording means and calculation means, for example an electronic card capable of receiving at least one recording medium of the removable memory card type, said motors being connected to the electronic card 21 by electrical cables for transmitting a signal.

[0118] The device 1 includes means for supplying at least two motors 70, 80, in the form of batteries 22 housed in the body 2 or an electrical wire that can be connected to a domestic electrical supply network via a transformer, said motors being connected to the supply means by electrical supply cables as illustrated [Fig.2].

[0119] The receiving member of a tool 50 of the third element 5 may include elastic return means capable of moving a tool 6 that said third element receives parallel to the first axis AA', between a so-called rest position in which the tool 6 is advanced forward and a so-called retraction position of said tool 6 in said receiving member 50 of a tool 6 in which the tool 6 is retracted backward. These rest and retraction positions are defined respectively by stops blocking the translation of the tool 6 in the receiving member 50 between a front stop of maximum extension of the tool 6 and a rear stop of maximum retraction of the tool 6 in the receiving member 50 of the third element 5.

[0120] Thus, when the device 1 is pressed against a surface, the marking end 60 can come into contact with the surface to mark it, and be in an intermediate position The median, perpendicular to the surface, lies between the rest position and the retraction position of the elastic return means, ensuring that the marking end 60 remains in contact with the surface even if the surface portion is warped. The device 1 may include, alternatively or in addition to the elastic return means, tool translation means capable of controlling the tool's position relative to the surface. This allows for the creation of a discontinuous pattern with the device 1.

[0121] This tool holder device 1 may include peripheral support pins 20 to the first, second and third elements 3, 45, in particular at least two support pins 20. These pins have a height configured to bear against a surface to be marked when a user positions the tool holder device 1 equipped with a tool 6 opposite a surface to be marked, their height allowing an intermediate position of the marking end 60 between the rest position and the retraction position.

[0122] The support pins 20 may include means for adjusting their height.

[0123] The spacing between the first axis AA' and the second axis BB'- can correspond to the distance between the second axis BB' and the third axis CC'.

[0124] The device 1 as described above and illustrated in figures 1 to 5 is equipped with a blade as a tool 6, it forms a scarifier allowing to form a grid by scratching or scarification.

[0125] The device 1 equipped with a tool 6 can be part of a marking system according to the invention allowing a defined pattern to be marked.

[0126] This marking system further comprises:

[0127] - means for calculating the corresponding trajectory of tool 6 to form a defined pattern, these calculation methods including for example a computer-type computing unit enabling the implementation of software to perform this calculation and obtain trajectory information, - means for calculating the movements of the first, second and third elements 3, 4, 5 of device 1 enabling tool 6 to follow the calculated trajectory to form the defined pattern, these calculation means comprising for example a computer-type computing unit enabling the implementation of software to perform this calculation from the trajectory information to obtain movement information, - means for calculating the actuation steps of at least two motors 70, 80 of device 1 enabling tool 6 to follow the calculated trajectory, these calculation means comprising for example a computer-type computing unit enabling the implementation of software to perform this calculation from the movement information to obtain actuation information, - means of recording the actuation steps of at least two motors 70, 80 of device 1 in a recording medium of the tool-carrying device, these recording means comprising, for example, a removable memory card and configured to record and / or read at least actuation information thereon, - means for transmitting the actuation steps recorded to device 1, these transmission means comprising for example a housing connected to the control unit 21 of device 1 configured to receive said removable memory card and to record and / or read at least actuation information thereon.

[0128] This marking system may also include means for taking into account in the calculations at least one parameter of play of the motor assemblies and transmission means 7, 8 of the device 1.

[0129] This marking system may also include means for determining at least one game parameter and for recording said at least one game parameter on means for recording calculation information, or other similar recording means.

[0130] The computing means, computer units and software can respectively be confused.

[0131] The calculation steps can be done on a computer unit external to device 1, for example of the computer type, then the actuation steps, possibly other information and possibly at least one game parameter can be recorded in recording means, for example of the memory card type which is then inserted into device 1.

[0132] Alternatively, the device 1 may include an integrated computer unit, of the type electronic card with microprocessor, which performs the calculations and records the actuation steps and possibly other information in recording means, for example, of the type memory card.

[0133] With reference to [Fig. 7], the marking end 60 can rotate in a plane that is perpendicular to the axes AA', BB', and CC'. It is possible to define an orthonormal coordinate system in which the marking end 60 moves to form a defined pattern. This coordinate system has an x-axis and a y-axis centered on the intersection between the rotation axis AA' of the first element 3 and said plane, as illustrated in [Fig. 7].

[0134] An actuation of the first motor 70 allows the first toothed wheel 711 attached to the first element 3 to be rotated by an angle a around the axis AA' of the first element, measured with respect to the axis of abscissas.

[0135] Actuating the second motor 80 allows the second toothed wheel 811, which is fixed to the toothed shaft driving the drive shaft 813, to rotate by an angle [3 around the axis BB' of the second element 4, measured with respect to the axis of the x-axis.

[0136] The angles a and [3 are considered positive when the displacement is in a trigonometric direction in the orthonormal frame illustrated in [Fig.7].

[0137] The marking end 60 therefore moves in the orthonormal frame illustrated in [Fig.7], and its coordinates in said orthonormal frame depend on the angles a and [3.

[0138] In order for the marking end 60 to form a defined pattern, a trajectory of the corresponding marking end 60 can be calculated, and a discretization of this trajectory into a succession of consecutive points can be calculated.

[0139] To determine the actuations of the first motor 70 and the second motor 80 necessary for the marking end 60 to move from one point to another along points forming the trajectory, the values ​​of angles a and [3] for the position of each point with coordinates (x, y) in said orthonormal frame can be calculated by solving the following system of equations: [OUO] (-x+(7?812+ÆgljcO^^

[0141] In this system of equations, R8[2 corresponds to the radius of the second gear 812, R8B corresponds to the radius of the drive shaft 813 which cooperates with the second gear 812. It should be noted that the sum of these two radii R8[2 and R8i3 corresponds to the distance between the axis of rotation of the first element AA' and the axis of rotation of the second element BB'.

[0142] Dbc corresponds to the distance between the axis of rotation of the second element BB' and the axis of rotation of the third element CC'.

[0143] The calculation can take into account the values ​​of the angles a and [3 of the previous point of the trajectory, to optimize the actuations of the motors.

[0144] The calculation can take into account the values ​​of the angles a and [3 of the next point of the trajectory, to optimize the actuations of the motors.

[0145] It should be noted that if on the one hand the distance between the axis of rotation of the first element AA' and the axis of rotation of the second element BB' and on the other hand the distance between the axis of rotation of the first element AA' and the axis of rotation of the second element BB' are equal, this makes it possible to create a pattern over the entire surface of a disk, even in the center of said disk.

[0146] This marking system allows the implementation of the marking process according to the invention described below.

[0147] The invention also relates to a method for marking a pattern, in particular a few millimeters to a few centimeters on a side, on a surface of a part, whether flat or curved in whole or in part, and comprising the following steps: - determining a pattern to be marked on a surface of a piece by applying the work of a marking system as described above, - implementation of software in a computer unit, for example a computer, for calculating the corresponding trajectory of the marking tool 6, - implementation of software in a computer unit, for example a computer, to calculate the movements of the first, second and third elements 3, 4, 5 of device 1, allowing the marking tool 6 to follow the calculated trajectory, - implementation of software in a computer unit, for example a computer, to calculate the actuation steps of at least two motors 70, 80 of device 1, allowing the marking tool 6 to follow the calculated trajectory, - recording of the actuation steps of at least two motors 70, 80 of device 1 in a recording medium of device 1. - implementation of the actuation of at least two motors 70, 80 of device 1 by a control unit 21, for example an electronic card, of device 1 according to the actuation steps of at least two motors 70, 80 of device 1 recorded in the recording medium.

[0148] During the calculation steps, this process can take into account at least one parameter of play of the motor assemblies and transmission means 7,8 of the device 1.

[0149] The method may also include steps for determining at least one clearance parameter of the motor assemblies and transmission means 7, 8 of the device 1, in particular: - actuation of at least two motors 70, 80 of device 1 to form a pattern of predetermined dimensions on a flat surface, - measurement of the dimensions of said engraved motif, - implementation of software in a computer unit for example of the type of computer for the calculation of at least one parameter of the play of the sets of motors and means of transmission 7, 8 of the device 1 from the variations between the measured dimensions of the marked pattern and the predetermined dimensions of said pattern.

[0150] This marking process can be implemented by using the marking system described above.

[0151] A device 1 as described above comprising a blade enabling the formation of a grid by scratching or scarification as a marking tool 6 as illustrated in figures 1 to 5 enables the formation of a scarifier.

[0152] A marking system as described above comprising a blade enabling the formation of a grid by scratching or scarification as a marking tool 6 equipping the device 1 as illustrated in figures 1 to 5 makes it possible to form a scarifying system.

[0153] A marking method as described above comprising a blade for forming a grid by scratching or scarifying as a marking tool 6 equipping device 1 as illustrated in figures 1 to 5 allows a scarification process to be formed.

Claims

Demands

1. A portable tool-holding device (1), comprising a longitudinal body (2) with a handle, a first element (3) pivoting about a first axis (AA'), a first element (3) on which is mounted eccentrically a second element (4) pivoting about a second axis (BB') parallel to the first axis (AA'), a second element (4) on which is mounted eccentrically a third element (5) suitable for receiving a marking tool (6) having a marking end (60), the tool-holding device (1) also comprising at least two motor assemblies and transmission means (7, 8) suitable for rotating at least the first and / or second element (3, 4), characterized in that the at least two motors (70, 80) of the at least two motor assemblies and transmission means (7, 8) are mounted juxtaposed longitudinally in the body (2), parallel to each other, and offset from the first, second and third elements (3, 4, 5).

2. Tool-carrying device (1) according to claim 1, characterized in that the third element (5) is pivotally mounted relative to the second element (4) along a third axis (CC') parallel to the first axis (AA'), and that it comprises a receiving member (50) configured to receive said tool (6).

3. Tool-carrying device (1) according to claim 2, characterized in that the receiving member (50) of the third element (5) comprises elastic return means capable of moving in translation a marking tool (6) which said third element (5) receives parallel to the first axis (AA') between a so-called rest position and a so-called withdrawal position of said tool (6) in said third element (5).

4. Tool-holding device (1) according to claim 2, characterized in that the receiving member (50) of the third element (5) comprises means for translating the tool capable of controlling in translation a tool which said third element receives parallel to the first axis between a so-called rest position and a so-called withdrawal position of said tool in said third element.

5. Tool holder device (1) according to any one of claims 2 to 4, characterized in that the distance between the first axis (AA') and the second axis (BB') corresponds to the distance between the second axis (BB') and the third axis (CC').

6. Scarifier characterized in that it is formed of a tool-holding device (1) according to any one of claims 2 to 5, said tool-carrying device (1) being equipped with a blade enabling the formation of a grid by scratching or scarifying.

7. A pattern marking system comprising a tool holder device (1) according to any one of claims 2 to 5 and equipped with a marking tool (6), said system comprising: - means for calculating the corresponding trajectory of the marking tool (6) to form a defined pattern, - means for calculating the movements of the first, second and third elements (3, 4, 5) of the tool holder device (1) enabling the marking tool (6) to follow the calculated trajectory, - means for calculating the actuation steps of at least two motors (70, 80) of the tool holder device (1) enabling the marking tool (6) to follow the calculated trajectory, - means for recording the actuation steps of at least two motors (70, 80) of the tool holder device (1) in a recording medium of the tool holder device (1), - means for transmitting the recorded actuation steps to the tool holder device (1).

8. Scarifying system characterized in that it is formed of a marking system according to claim 7, said tool-carrying device (6) being equipped with a blade enabling the formation of a grid by scratching or scarifying.

9. A method for marking a pattern, in particular a few millimeters to a few centimeters on a side, on a surface of a workpiece, whether flat or curved, in whole or in part, characterized in that it comprises the following steps: - determining a pattern to be marked on a surface of a workpiece by implementing a marking system having the characteristics of a marking system according to claim 7, - implementing software in a computer unit for calculating the corresponding trajectory of the marking tool (6), - implementing software in a computer unit for calculating the movements of the first, second, and third elements (3, 4, 5) of the tool-holder device (1) enabling the marking tool (6) to follow the calculated trajectory, - implementing software in a computer unit for calculating the actuation steps of the at least two motors (70, 80) of the tool holder device (1) enabling the marking tool (6) to follow the calculated trajectory, - recording of the actuation steps of at least two motors (70, 80) of the tool holder device (1) in a recording medium of the tool holder device (1), - implementation of the actuation of at least two motors (70, 80) of the tool holder device (1) by a control unit (21) of the tool holder (1) according to the actuation steps of at least two motors (70, 80) of the tool holder device (1) recorded in a recording medium of the tool holder device (1).

10. Marking method according to claim 9, characterized in that the calculation steps of the method incorporate consideration of at least one backlash parameter of the motor assemblies and transmission means (7, 8) of the tool holder device (1).

11. Marking method according to claim 10, characterized in that it comprises steps for determining at least one backlash parameter of the motor assemblies and transmission means (7, 8) of the tool holder device (1), in particular: - actuation of at least two motors (70, 80) of the tool holder device (1) to form a pattern of predetermined dimensions on a flat surface, - measurement of the dimensions of said engraved pattern, - implementation of software in a computer unit for calculating at least one backlash parameter of the motor assemblies and transmission means (7, 8) of the tool holder device (1) from the variations between the measured dimensions of the marked pattern and the predetermined dimensions of said pattern.

12. A method for scarifying a surface of a part, characterized in that it comprises the steps of the marking method according to any one of claims 9 to 11, and in that the tool-holding device (1) of the marking system is equipped with a blade enabling the formation of a grid by scratching or scarification.

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