FR3050135B1 - ELECTROPORTATIVE DEVICE FOR AUTOMATICALLY MACHINING A WOODEN PIECE. - Google Patents

Abstract

The invention relates to a device (100) for the automated machining of a piece of wood, in the form of a one-piece assembly, and comprising: - a frame (102), - at least one tool for machining said piece, mounted free in translation relative to said frame (102) in at least one direction, said translation, - at least one motor, said drive, for moving said tool, and - at least one means (112, 118, 124), said translation, for moving said tool according to at least one translation direction (X, Y, Z) for machining said workpiece (406); said device (100; 400) further comprising at least one digital control module (128) for controlling and / or controlling at least one, in particular each, translation means (112,118,124) of said tool.

Description

"Portable power tool for automated machining of a piece of wood"

Field of the invention

The present invention relates to a portable power tool for automated machining of a piece of wood.

The field of the invention is the field of portable woodworking machining devices, such as milling machines, circular saws, routers or electric planes, in particular for making tenons, mortises, recesses, tails of mounds, stairs, sculptures, etc.

State of the art

There are known power tools for working pieces of wood. These devices generally comprise a tool, a drive motor of said tool for machining the piece of wood. Generally, the tool is mounted on a tool holder that can be moved manually to come into contact with the workpiece, usually with a handle that the user manipulates with one of his hands and function of the machining to be performed.

These portable woodworking machines are not very ergonomic because the user must itself apply the movement of the tool holder to achieve the desired machining while maintaining the device.

In addition, these devices are not easy to use and require know-how, without which, machining errors are common, causing the loss of machined parts.

In addition, with the current portable devices, the user is in a situation of manipulation of the tool at any time during the machining of the workpiece and can be injured either with the tool, or with the projections generated during machining.

An object of the present invention is to overcome these disadvantages.

Another object of the invention is to provide a portable power tool for automated machining of a piece of wood more ergonomic.

Yet another object of the invention is to provide a portable power tool for automated machining of a piece of wood easier to use.

It is also an object of the invention to provide a portable power tool for automated machining of a piece of wood reducing the risk of injury during the machining of a piece of wood.

DISCLOSURE OF THE INVENTION The invention makes it possible to achieve at least one of these objects by a portable power tool for automated machining of a piece of wood, in the form of a one-piece assembly, and comprising: a frame, intended to be fixed relative to the workpiece, -at least one tool for machining said workpiece, mounted free in translation relative to said frame in at least one direction, called translation, -at least one motor, said drive, for moving said tool, and at least one means, said translation, for moving said tool in at least one direction to perform a machining of said workpiece; said device further comprising at least one digital control module for controlling and / or controlling at least one, in particular each, translation means of said tool.

Thus, the invention proposes a portable device for machining a piece of wood, comprising one or more translation means for moving the tool during machining of the part, controlled by a digital control module. . In other words, the workpiece is machined in an automated manner. Therefore, the user does not have to manipulate the tool to move it during machining.

Thus, the device according to the invention is more ergonomic and presents less risk of injury to the user compared to the power tools of the state of the art.

In addition, the movement of the tool being performed in an automated manner, the use of the device according to the invention is easier and does not require specific expertise, which reduces machining errors and therefore losses.

Preferably, the tool for machining the workpiece can be freely mounted in translation, relative to the frame, in several directions and in particular in three directions.

Each direction of translation of the tool can be perpendicular to the other directions of translations.

Preferably, for at least one, in particular each, direction of translation, the translation of the tool can be performed independently of the other translation directions.

According to a particularly advantageous characteristic, the device according to the invention may further comprise a part, called a positioning table, movable between: a position, referred to as a reference, in which it is against the workpiece and indicates a reference position for machining, and in particular a reference position for positioning the workpiece relative to the tool in at least one direction of translation, and - a retracted position.

Thus, the device according to the invention can be easily positioned relative to the workpiece, which further facilitates its use.

For example, the positioning table can be moved between the reference position and the retracted position, by translation in one direction. Such a move is easy and inexpensive to implement.

The direction of movement of the positioning table may be a direction perpendicular to the workpiece.

In particular, the direction of movement of the positioning table may be parallel to, or coincident with, a direction of translation of the tool.

In the present invention, a front face, respectively a front wall, of the device or the frame of said device corresponds to the face, respectively to the wall, which is opposite the workpiece during machining of said workpiece.

In addition, the device according to the invention may comprise: a means for holding the positioning table in position in the reference position; and / or - at least one means for moving, in particular automated, said positioning table between the reference positions and retracted.

The holding means in position may advantageously comprise one or more electromagnets cooperating with a metal part, in particular with a metal part forming part of the frame, such as for example a metal front wall of the frame or metal parts fixed on said front wall. .

Of course, other holding means may be used.

Each moving means may for example comprise a jack, a piston or a stepping motor, arranged to move the positioning table between the reference and retracted positions.

Each moving means can be controlled by the digital control module.

In a preferred version of the device according to the invention, in the reference position, the positioning table can be aligned with a front face of the frame, facing the workpiece.

Thus, in this position, the workpiece abuts against the positioning table, or the front face of the frame. This facilitates the positioning of the power tool according to the invention with respect to the workpiece, at least in a direction perpendicular to said front face.

Advantageously, the device according to the invention may further comprise a part, said support table, secured to the frame and for placing said device on the workpiece.

Thus, the user wishing to machine a part has just put the device according to the invention on the workpiece where he wants to perform the machining, without having to manipulate the workpiece.

In addition, the support table can be used as an abutment, in particular reference, in at least one direction of translation of the tool.

The device according to the invention may further comprise means for fixing the support table to the workpiece, so that, during the machining of said workpiece, said tool remains integral with said workpiece, alone , without having to be maintained by the user.

Thus, the user comes to position the device according to the invention on the workpiece where he wants to perform the machining, then locks with said workpiece through the fastening means, it can then move away of the machining area. Consequently, the ergonomics and ease of use of the device according to the invention are increased, and the risk of injury to the user is reduced.

The fixing means may be any known fastening means.

In particular, the fixing means may comprise one or more stirrups coming to tighten the device according to the invention, and in particular the support table, against the workpiece.

The fastening means can be manually controlled.

Alternatively, the fixing means can be automated, and in particular controlled by the control module.

For at least one, in particular each direction of translation, the translation means may comprise a stepper motor associated with a screw extending in said direction. Thus, the stepping motor sets the screw in rotation, thus causing the tool to move in the direction defined by the screw.

Of course the translation means may alternatively be a servomotor or any other means.

For at least one, in particular each direction of translation, the translation means may further comprise at least one slideway for guiding the tool in said translation direction. This or these slides to maintain the tool in position and guide the tool during its translation.

According to a particular embodiment, the tool can be mounted to a body, said mobile, free in translation relative to said movable body, along one or more direction (s).

In particular, the tool can be mounted mobile in translation in exactly two directions perpendicular to each other. One of the translation directions may be parallel to a front face of the device according to the invention, and in particular with respect to a front face of the chassis. The other of the translation directions may be perpendicular to a front face of the device according to the invention, and in particular with respect to a front face of the frame.

The movable body may itself be mounted free in translation relative to the frame in at least one direction.

In particular, the movable body can be freely mounted in translation in exactly one direction. The direction of translation of the movable body may be parallel to a face / front wall of the device according to the invention, and in particular with respect to a face / front wall of the chassis.

In addition, the direction of translation of the movable body may be perpendicular to at least one, in particular each direction of translation of the tool relative to the movable body.

According to an exemplary non-limiting embodiment, the movable body can be mounted free in translation relative to the frame in a first direction, and the tool can be mounted free in translation relative to said movable body in two other directions perpendicular to each other and at the said first direction.

Preferably, the positioning table can be mounted to the movable body, free in translation along at least one direction of translation.

The direction of translation of the positioning table may be perpendicular to a face / front wall of the device according to the invention, and in particular to a face / front wall of the frame of said device.

In particular, the direction of translation of the positioning table may be perpendicular to a direction of translation of the movable body.

In addition, in its reference position, the positioning table can be housed in an opening in the frame, and in particular in a front wall, of the device according to the invention so as to prevent movement, and in particular the translation, of the moving body. Thus, the positioning table can be used as a security concerning the movement of the moving body.

Furthermore, in the retracted position, the positioning table can be aligned with a face / front wall of the movable body.

In particular, in its retracted position, the positioning table can be housed in an opening in a front wall of the movable body so as to allow the displacement, and in particular the translation, of the movable body. Thus, the positioning table is stored in the front wall of the movable body and does not constitute an obstacle during the machining of the piece of wood.

The device according to the invention may further comprise a user interface designed to enter at least one control relating to the machining of the part.

Such a user interface may be a control panel comprising one or more control buttons, or a touch surface, allowing for example: - to enter one or more commands to perform a machining: these commands may for example comprise data representing a shape and / or at least one dimension of the machining to be performed; and / or - selecting one or more templates / forms of machining previously entered and stored in a local memory to said device.

Such a user interface may preferentially comprise a display screen making it possible to visualize the shape of the machining to be performed for example before validating said machining. The display screen may be tactile and partially or completely include the control panel. The tool according to the invention may further comprise one or more wired or wireless communication ports making it possible to transfer data relating to a machining of a part, or to a model, to said tool, or from said tool. machining.

The device according to the invention may for example be a milling machine, a circular saw, a router or an electric plane.

Of course, this list is given for information only and is not limiting.

According to a nonlimiting exemplary embodiment, the device according to the invention may comprise a tool holder for receiving, interchangeably, several tools for machining the workpiece. The tool can be changed independently of the drive motor of said tool. Alternatively, the tool can be changed with the drive motor.

According to an advantageous embodiment, the device according to the invention may comprise: - a movable body, mounted free in translation relative to the frame in a first direction, - a tool holder mounted free in translation relative to the following movable body a second direction, and - a tool holder mounted free in translation relative to the tool support in a third direction; said first, second and third directions being perpendicular to each other.

In addition, in a nonlimiting manner, the device according to the invention can be used for: - the realization of tenons, mortises, recesses, tails dondes of months; - the manufacture of stair parts; and / or - the realization of sculptures.

DESCRIPTION OF THE FIGURES AND EMBODIMENTS Other advantages and characteristics will appear on examining the detailed description of a non-limiting embodiment, and the appended drawings in which: FIGURES 1-3 are diagrammatic representations according to different views of a first embodiment of the device according to the invention; and FIGURES 4-8 are schematic representations according to different views, and in different configurations, of a second exemplary embodiment of the device according to the invention.

It is understood that the embodiments which will be described in the following are in no way limiting. It will be possible, in particular, to imagine variants of the invention comprising only a selection of characteristics described subsequently isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention with respect to the state of the art. This selection comprises at least one feature preferably functional without structural details, or with only a part of the structural details if this part is only sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

In the figures, the elements common to several figures retain the same reference.

FIGURE 1 is a schematic representation of a non-limiting embodiment of a device according to the invention in a rear view. FIGURE 2 is a schematic representation of the device of FIGURE 1 in a view from above and FIGURE 3 is a schematic representation of the device of FIGURE 1 in a side view.

The device 100, shown in FIGURES 1-3, is in the form of a one-piece assembly comprising a frame 102. The frame 102 is formed mainly by a wall, or a plate, substantially flat, forming a front wall of the device 100. Therefore, in the following frame 102 will be confused with the plate or the wall.

The device 100 comprises a movable body 104, in the form of a box comprising a tool support 106.

The tool support 106 comprises a tool holder 108 designed to receive interchangeably, a tool for machining a piece of wood fixed to a drive motor of said tool (not shown).

The movable body 104 is mounted on the chassis 102, free in translation, with respect to the front wall 102, along an axis marked X, thanks to two ball guides 110i-1102, positioned at two opposite edges of the front wall. 102. The translation axis X is parallel to the plane formed by the wall 102.

To move the movable body 104 in translation along the axis X, the device 100 comprises a stepping motor 112 rotating a screw 114, one end of which is integral with the frame 102.

The tool support 106 is mounted on the movable body 104 free in translation with respect to said movable body 104 along a first axis, denoted by Y, by virtue of two slides 116i and 1162, visible in FIGS. Y is perpendicular to the X axis, and parallel to the plane formed by the chassis, or the front wall, 102.

To move the tool support 106 in translation along the Y axis, the device 100 comprises a stepping motor 118 rotating a screw 120, one end of which is integral with the movable body 104.

The tool holder 108 is mounted on the tool support 106 free in translation with respect to said movable body 104 along an axis, denoted Z, by means of two slides 122i and 1222. The translation axis Z is perpendicular to the axes X and Y , and perpendicular to the plane formed by the frame, or the front wall, 102.

To move the tool holder 106 in translation along the axis Z, the device 100 comprises a stepping motor 124 rotating a screw 126, visible in FIG. 2, one end of which is secured to the tool support 106.

Thus, in the device 100 the movable body 104 is free in translation along the axis X relative to the frame 102, the tool support 106 is free in translation along the axis Y relative to the movable body 104 and the tool holder 108 is free in translation along the axis Z with respect to the tool support 106. Consequently, the tool for machining the workpiece as well as the drive motor of said tool is free in translation with respect to the frame 102, and to the workpiece, in each of the X, Y and Z directions independently and individually.

The movable body 104 also comprises a control module 128, wiredly connected to each of the stepper motors 112, 118 and 124 for controlling, individually, each of said motors to move the tool in the three directions X , Y and Z according to orders previously entered by the user and stored in a storage means 130.

The control module 128 and the memory 130 are secured to the movable body 104, so that they are translated along the axis X, when the movable body 104 is in translation along the axis X relative to the frame 102 The tool 100 further comprises a user interface (not shown) allowing a user to: - enter or modify data relating to a shape, or a dimension, and / or - select a shape, and / or a dimension , previously stored in the memory 130; for the machining to be performed in the workpiece.

Such an interface is preferably formed by a touch screen display.

The data input, or modified, or selected, are then used by the control module 128 to automatically control each of the stepper motors 112, 118 and 124, and possibly a drive motor of the tool machining, to achieve automated machining of the workpiece.

FIGURES 4-8 are simplified schematic representations of another non-limiting embodiment of the device according to the invention, and in different configurations.

The device 400 is shown in FIGURE 4 in a side view and placed on a workpiece, and in FIGURE 5 in an isometric front view.

The device 400, shown in FIGURES 4-5, may comprise all the elements of the device 100 of FIGURES 1-3.

The device 400 further comprises a plate 402, called support table, equipped with one or more stirrups 404.

Thus, the device 400 can be placed on a workpiece 406 and fixed to said workpiece by means of the support table and the stirrups 404, so that, during the machining of the workpiece 406, the device 400 holds alone on the workpiece 406, without having to be maintained by an operator.

The support table 402 is fixed to the front face of the frame, or to the wall, 102 on the opposite side to the movable body 104, in a substantially perpendicular manner and in an upper half of said wall 102. Each stirrup 404 is attached to the support table 402 on a peripheral edge of said support table 402.

Each yoke 404 can be repositioned, continuously or discretely, along the periphery of said support table 402. The tightening / loosening of each yoke 404 can be performed manually, in a conventional manner.

In addition, the support table 402 positions the workpiece 406, respectively the device 400, at a reference position on the Y axis.

Furthermore, the support table 402 includes a positioning mark 408, visible in FIG. 5, for positioning the device 400 on the workpiece 406 at a reference position on the X axis, for example at the using a marker previously drawn on said workpiece 406.

The device 400 further comprises a plate 410, called a positioning table, for positioning the device 400 at a reference position on the Z axis. The positioning table 410 is mounted on the mobile body 104, free in translation according to the Z axis, thanks to four slides 412i-4144.

The positioning table 106 can be moved between a reference position and a retracted position, by translation along the Z axis, by means of two cylinders 414i-4142.

FIGURES 6a-6b show the positioning table 410 in a reference position, seen from the front and seen from behind. In the reference position, the positioning table 410 is housed in an opening 416 provided in the wall 102. In this position, the front face of the positioning table 410 is aligned with the front face of the wall 102. positioning table 410 is in reference position, the movable body 104 can not be translated along the axis X.

FIGURES 7a-7b show the positioning table 410 in a retracted position, respectively seen from the front and seen from behind. In the retracted position, the positioning table 410 is housed in an opening 418 provided in the front wall of the movable body 104. In this position, the front face of the positioning table 410 is aligned with the front face of the movable body 104 and the movable body 104 can be translated along the X axis.

FIGURE 8 shows, in a rear view, the positioning table 410 in a retracted position and the movable body 104 after a translation along the X axis.

In addition, the device 400 comprises means for holding the positioning table 410 in the reference position. These means comprise four electromagnets 416i-4164 positioned at each corner of the positioning table 410, on the rear face of said positioning table 410. Each magnet 416i-4164 cooperates with a metal plate, respectively 418i-4184, disposed in said magnet on the rear face of the plate 102. In the reference position, the electromagnets 416 are activated and maintain the positioning table in the reference position by cooperating with the metal plates 418.

When the positioning table 410 is to be positioned in the retracted position, the electromagnets 416 have deactivated and the positioning table 410 is translated to the retracted position by the cylinders 414.

The cylinders 414, and / or the electromagnets 416, can be controlled, automatically, and through a wire connection, by the control module 128.

Of course, the invention is not limited to the examples detailed above.

Claims (15)

1. A device (100; 400) for automated machining of a piece of wood (406), in the form of a one-piece assembly, and comprising: a frame (102) intended to be fixed relative to the workpiece (406), - at least one tool for machining said workpiece, mounted free in translation relative to said frame (102) in at least one direction, called translation, - at least one motor, said drive to move said tool, and - at least one means (112, 118, 124), said translation, for moving said tool in at least one direction of translation (Χ, Υ, Ζ) to perform a machining of said coin (406); said device (100; 400) further comprising at least one digital control module (128) for controlling and / or controlling at least one, in particular each, translation means (112,118,124) of said tool. 2. Device (400) according to the preceding claim, characterized in that it further comprises a part (410), called the positioning table, movable between: - a position, called reference, in which it is against the piece to machining (406) and indicating a reference position for machining, - a retracted position different from said reference position. 3. Device (400) according to the preceding claim, characterized in that it comprises: - means (416,418) for holding in position said positioning table (410) in the reference position; and / or - at least one means (414) for moving, in particular automated, said positioning table (410) between the reference positions and retracted. 4. Device (400) according to any one of claims 2 or 3, characterized in that in the reference position, the positioning table (410) is aligned with a front face of the frame (102), facing the workpiece (406). 5. Device (400) according to any one of the preceding claims, characterized in that it further comprises a part (402), said support table, secured to the frame (102) and for laying said device (400). ) on the workpiece (406). 6. Device (400) according to any one of the preceding claims, characterized in that it further comprises means (404) for fixing the support table (402) to the workpiece (406), so that said device (400) remains integral with said workpiece (406), alone, during the machining of said workpiece (406). 7. Device (100; 400) according to any one of the preceding claims, characterized in that, for at least one, in particular each direction of translation (Χ, Υ, Ζ), the translation means comprises a step motor. step (112,118,124) associated with a screw (114,120,126) extending in said direction (Χ, Υ, Ζ). 8. Device (100; 400) according to any one of the preceding claims, characterized in that the tool is mounted to a body (104), said mobile, free in translation relative to said body (104), according to at least one, in particular at least two, direction (s) (Y, Z). 9. Device (100; 400) according to the preceding claim, characterized in that the movable body (104) is mounted free in translation relative to the frame (102) in at least one direction (X). 10. Device (100; 400) according to claim 9, characterized in that the movable body (104) is mounted free in translation relative to the frame (102) in a first direction (X), and the tool is mounted free in translation relative to said movable body (104) along two other directions (Y, Z), perpendicular to each other and to said first direction (X). 11. Device (400) according to any one of claims 2 to 4 and any one of claims 8 to 10, characterized in that the positioning table (410) is mounted to the movable body (104), free translation. following at least one direction (Z). 12. Device (400) according to the preceding claim, characterized in that, in the retracted position, the positioning table (410) is aligned with a front face of the movable body (104). 13. Device (100; 400) according to any one of the preceding claims, characterized in that it comprises a user interface provided to enter at least one control relating to the machining of the workpiece (406). 14. Device (100; 400) according to any one of the preceding claims, characterized in that it is a milling cutter, a circular saw, a router or an electric plane. 15. Use of the device (100; 400) according to any one of the preceding claims for: - the realization of tenons, mortises, recesses, tails of mounds dondes; - the manufacture of stair parts, and / or - the realization of sculptures.