EP4611962A1 - Werkzeugeinrichtung, werkzeugmaschinen- und werkzeugeinrichtungskombination und herstellungsverfahren - Google Patents
Werkzeugeinrichtung, werkzeugmaschinen- und werkzeugeinrichtungskombination und herstellungsverfahrenInfo
- Publication number
- EP4611962A1 EP4611962A1 EP23801337.9A EP23801337A EP4611962A1 EP 4611962 A1 EP4611962 A1 EP 4611962A1 EP 23801337 A EP23801337 A EP 23801337A EP 4611962 A1 EP4611962 A1 EP 4611962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- connection device
- profile contour
- profile
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/008—Chucks; Expansion mandrels; Adaptations thereof for remote control with arrangements for transmitting torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/003—Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2265/00—Details of general geometric configurations
- B23B2265/32—Polygonal
Definitions
- the present invention relates to a tool device with at least one working area suitable for acting on a workpiece, which is intended for use with a particularly hand-held machine tool with a rotary-oscillating drive shaft.
- a rotary-oscillating machine tool hereinafter also referred to as an oscillation machine or oscillator, is in the sense of the present invention a device with a rotary-oscillating drive device with a drive shaft, in which the drive device moves from a central position in a first direction of rotation, is braked to a standstill and then moves in the opposite direction of rotation until it comes to a standstill.
- the rotary-oscillating movement of the tool makes it possible - unlike machines with a continuous rotary movement such as drills, circular saws, grinding machines, etc. - to use tools with a non-rotationally symmetrical design.
- Rotary-oscillating machine tools are therefore also referred to as multitools.
- the oscillation movement of the drive device of the rotary-oscillating machine tool is usually generated by a drive motor whose output shaft is arranged at a 90° offset from the (fictitious) longitudinal axis of the drive shaft and usually rotates in one direction at an adjustable speed.
- An eccentric is arranged on the output shaft of this motor, which drives the drive device of the rotary-oscillating machine tool via a fork.
- the (fictitious) axis around which the tool device oscillates is referred to below as the oscillation axis or, in short, the rotation axis.
- the angular distance of the oscillation movement from the middle position to the respective end position can typically be up to 5°, although smaller angles of 1° to 2.5° are common in implemented machines, which corresponds to a total oscillation angle (1st - 2nd end position) of 2° to 5°.
- This oscillation movement is typically carried out between 5,000 and 50,000 times per minute.
- the reversal of the direction of rotation means that the machining forces of the tool, which as we know always act against the direction of movement or in this case against the direction of rotation, also change direction.
- the machining forces changing direction result in a torque corresponding to the lever arm, i.e. the distance between the machining point of the tool and the axis of rotation, which reverses direction with the oscillation.
- the torque resulting from the machining forces is superimposed on another torque that is effective both during machining and when idling, namely the torque resulting from the moment of inertia of the tool and the oscillating parts of the machine tool to brake the tool after its highest speed (e.g. the respective amplitude maximum of the sine curve with a sinusoidal change in the rotational speed of the drive device) and the renewed acceleration of the tool in the opposite direction after the direction of rotation is reversed.
- the torques generated by the machining forces and the kinematic conditions of the oscillation drive are essentially applied by the machine tool and introduced into the tool device via the drive device.
- the area of the tool in which the torque is introduced is subject to alternating bending stress. This is particularly problematic with metallic materials, from which the tools in question are usually made. Metals have a crystal structure. If local overloads occur in an area of a metallic component, i.e. the stresses acting in the component at this point are higher than the stresses that the component can bear, then Microcracks develop between the individual grains of the metal structure. These affect the strength of the component in two ways. Firstly, no stresses can be transferred in the component in the area where microcracks have developed. This means that the crack formation increases the loads within this area because the effective area for force transmission is reduced.
- notch effect a phenomenon occurs that is usually referred to in mechanical engineering as the "notch effect".
- the name comes from the fact that in the area of a notch, especially if the notch has sharp edges, a local stress concentration occurs, which leads to stresses in the area of the material surrounding the notch that are higher than the stresses in the areas of the component that are not affected by such a geometry.
- the ability of a material or component to withstand oscillating loads and in particular alternating bending loads is usually represented by the so-called Wöhler curve of this component.
- the Wöhler curve is based on the knowledge that alternating loads - in the Wöhler test this is referred to as load changes - can in many cases be sustained permanently, particularly by a component made of steel, if the component withstands between 2 million and 6 million (depending on the material) such load changes under this load without damage. In mechanical engineering, this is referred to as the so-called fatigue strength of the material or component.
- an oscillating tool oscillates at a frequency of 20,000 oscillations/min. In terms of operational component design, this means 40,000 load changes/min or 2.4 million load changes/h.
- the level of strain depends largely on the design of the interface and the machining forces that the tool exerts on a workpiece. are applied. In general, a distinction can be made between mass forces and processing forces.
- the mass forces that load the interface are caused by the rotational oscillation, i.e. by the braking of the tool and the acceleration in the opposite direction of rotation. They also occur when the tool is idling, when the tool device is not in contact with a workpiece.
- the mass forces depend on the mass moment of inertia of the tool around its oscillation axis, the speed and the total oscillation angle.
- the mass moment of inertia itself depends on how the tool weight is arranged around the oscillation axis. In general, heavy tools have a greater mass moment of inertia around the oscillation axis than light tools.
- the machining forces depend on the type of machining, the material properties of the workpiece being machined, the normal force with which the tool is pressed against the workpiece, and the performance data of the oscillation machine.
- the Starlock interface is designed three-dimensionally with contact surfaces of the machine's tool holder and the tool's connection device inclined to the oscillation axis. This has several advantages: the three-dimensional design increases the contact surface between the machine's tool holder and the tool's connection device, which reduces the surface pressure under the same load.
- the forces are transferred to the tool device's connection device in a form-fitting manner via a specially designed profile with a total of twelve rounded projections that project radially outwards and enable even force to be introduced into the tool.
- This profile is provided on the one hand in the tool holder of the oscillation machine and on the other hand as an essentially complementary profile, also with twelve projections, in the tool's connection device.
- the inclination of the contact surfaces means that the tool's connection device can be pressed into the tool holder of the oscillation machine in the direction of the oscillation axis in such a way that the connection device is received by the tool holder without any play. This prevents the occurrence of relative play between the tool holder and the tool device.
- the Starlock interface has, as its inventors had anticipated, made it possible to use oscillating machines with significantly higher performance than was previously possible.
- the present invention therefore has the object of providing an alternative profile for the connection device of the tool that is compatible with Starlock.
- This object is achieved according to the invention by a tool device according to the corresponding independent claims. Further independent claims protect a machine tool and tool device combination as well as a manufacturing method. Preferred embodiments of the invention are the subject of the subclaims.
- top and bottom are used to mean “closer to the machine tool” and “bottom” means “further from the machine tool”.
- the terms top and bottom correspond to the working position of a hand-held machine tool when it is used, for example, to carry out grinding work on a horizontal surface which is located below the hands of the machine tool operator, or to carry out sawing work on a vertical structure where the saw is also located below the hands of the operator.
- the machine tool can also be used in other orientations.
- a component arranged "top” according to the present definition is actually located below a component arranged "bottom” according to the present definition.
- a first aspect of the present disclosure relates to a tool device with at least one working area suitable for acting on a workpiece, which is intended for use with a machine tool, in particular a hand-held machine tool, wherein the machine tool has a rotary-oscillating drive shaft which moves at least 10 times per second in a first direction of rotation around a machine-fixed axis of rotation and then reverses the movement and moves in a second, opposite direction of rotation, wherein on this drive shaft and coaxially thereto a machine connection device with an inner profile which widens conically in the direction of the axis of rotation is arranged, which has a profile contour running around the axis of rotation with a number of twelve convex projections projecting inwards towards the axis of rotation and twelve concave depressions which form an uninterrupted, essentially continuously extending profile wall which are arranged essentially rotationally symmetrically around the axis of rotation, wherein this conical widening is oriented such that the area of the inner profile with the smaller inner diameter is closer
- this drive shaft has a holding device for holding the tool device
- the tool device has a tool connection device which can be connected to this machine connection device in a substantially rotationally fixed manner in order to transmit torques and forces between the machine tool and the tool device, so that the tool device carries out a rotationally oscillating movement coaxially to this drive shaft
- the tool connection device has an outer profile with a profile contour running around the axis of rotation with at least one outward-facing projection, wherein this at least one projection is designed to engage in these recesses of the inner profile of the machine connection device when connected to the machine tool
- the at least one outward-facing projection has at least two contact surfaces, wherein at least one of these contact surfaces is provided for transmitting the rotational movement of the machine connection device to the tool connection device in the first direction of rotation, and wherein at least a second of these contact surfaces is provided for transmitting the rotational movement of the machine connection device to the tool connection device in the second direction of rotation, wherein the profile contour of
- the mass of the tool device and/or its (rotational) moment of inertia (hereinafter also referred to as moment of inertia for the sake of simplicity) can be reduced.
- material savings can be achieved in the manufacture of the tool device, and the tool device can optionally also be used with machine tools that have a different machine connection device than the machine connection device defined according to the first aspect.
- the torque that is transmitted from the machine tool to the The number of workpieces can be increased so that they can be transferred to the tool device or can be picked up by the tool device, in particular without damaging the tool device.
- the term "protrusion" in connection with the profile contour of the tool connection device is to be understood such that the profile contour of the tool connection device is concave in at least one cross section perpendicular to the axis of rotation in at least one area (of the outer circumference).
- a regular triangle, quadrilateral, pentagon, etc. or even a rectangle has no “protrusion” because there is no concave area between the corners of these polygons (seen from the outside).
- a quadrilateral with a corner whose interior angle is greater than 180° has two projections, namely at the corners adjacent to this corner.
- protrusion in connection with the profile contour of the tool connection device is preferably understood to mean that the profile contour of the tool connection device is concave in at least one cross section perpendicular to the axis of rotation in at least two areas (of the outer circumference).
- quadrilateral mentioned above with an interior angle that is greater than 180° would therefore have no protrusion.
- a square with an additional triangle formed on one edge would have exactly one protrusion, namely at the remaining, outward-pointing tip of the triangle between these two interior angles.
- profile contour of the tool connection device here means the outer profile of the tool connection device.
- the tool connection device can also have an inner profile (facing the axis of rotation) with an (inner) profile contour that can (essentially) correspond to the profile contour of the outer profile of the tool connection device or can (significantly) deviate from it.
- Profile contour of the machine connection device here means the inner profile of the machine connection device.
- profile contour of the tool connection device does not necessarily refer to the entire axial extension of the tool connection device, although this is also possible.
- the profile contour of the tool connection device can extend between two axial positions in such a way that one or both of these axial positions do not coincide with the corresponding axial end positions of the tool connection device.
- the tool connection device can have roundings on one or both of its axial end positions (or in their vicinity), wherein the profile contour of the tool connection device extends over an axial region or lies in such an axial region that adjoins this rounding(s) or lies between these roundings.
- this axial region can lie (essentially) concentrically between the axial end positions of the tool connection device or the roundings, or non-concentrically - for example, if one of the roundings extends over a larger axial region than the rounding located at the other axial end.
- the profile contour of the tool connection device can, for example, extend over an axial region that corresponds to at most 90% or at most 80% or at most 70% or at most 60% or at most 50% of the axial extension of the tool connection device.
- the axial extent of the tool connection device can be (at least in some angular ranges related to the axis of rotation) equal to the axial extent of the machine connection device, or greater or smaller than this.
- the axial extent of the profile contour of the tool connection device can be equal to the axial extent of the profile contour of the machine connection device, or greater or smaller than this.
- a plane perpendicular to the axis of rotation is also referred to here as a radial plane.
- a radial plane In relation to the machine tool, such a radial plane is therefore a plane perpendicular to the axis of rotation of this machine tool.
- a radial plane In relation to the tool device, such a radial plane is a plane perpendicular to the axis of rotation of the tool device, around which the latter moves in a rotationally oscillating manner when the tool device is connected coaxially to the axis of rotation of the machine tool as intended and is driven by it.
- the inclination of the profile contour of the tool connection device to a radial plane can be 90° or assume a value other than 90°.
- the profile contour of the tool connection device is not inclined to the axis of rotation or the inclination of the profile contour of the tool connection device to the axis of rotation is 0°.
- the inclination of the profile contour of the tool connection device to the axis of rotation is other than 0°.
- a tangential plane at A point of the inclined profile contour of the tool connection device intersects the axis of rotation at exactly one point.
- the inclination can be greater or smaller than 90°, whereby in the present case an inclination that is less than 90° is defined as an inclination at which the profile contour of the tool connection device (or an axial section thereof) opens (further) downwards. Accordingly, in the present case an inclination that is more than 90° is defined as an inclination at which the profile contour of the tool connection device (or an axial section thereof) becomes narrower downwards.
- feature e) in particular makes it clear that the inclination of the profile contour of the tool connection device (or of an axial section thereof) can deviate from the inclination of the profile contour of the machine connection device (or of an axial section thereof).
- the term "recess” can be understood as a through hole (or a through bore) or as a non-through hole (or a blind hole recess) or both, unless something else is explicitly specified and/or arises from the context.
- the term "bore” or “through bore” used here is not to be understood as meaning that such a bore or through bore must necessarily be created by drilling. Instead, such a bore or through bore can also be created by other process steps, in particular by primary forming, forming or generative process steps.
- a bore or through bore does not necessarily have to have a round cross-section, but can in principle take on any cross-sectional shape.
- the twelve convex projections projecting inwards towards the axis of rotation and the twelve concave depressions of the machine connection device can together form a star with twelve points, in particular a regular star, i.e. with twelve points regularly distributed around the circumference with an angular spacing of 30°.
- the interior angles of this 12-pointed star can be, for example, 120° at the points and 210° at the points in the middle between two adjacent points.
- the transitions between two adjacent sides of this 12-pointed star can be rounded, especially to facilitate manufacturing.
- the radius of curvature of such transitions can, for example, be in a range between 5 mm and 1.5 mm.
- the radius of curvature can be smaller at the upper axial end of the machine connection device than at the lower axial end of the machine connection device.
- this radius of curvature in particular in a radial plane which lies centrally between the two axial ends of the machine connection device, is greater than 2 mm, in particular greater than 214 mm, preferably greater than 2.5 mm.
- this radius of curvature, in particular in the centrally arranged radial plane is less than 4.5 mm, in particular less than 4 mm, preferably less than 3.5 mm. Further preferably, this radius of curvature, in particular in the centrally arranged radial plane, is approximately 3 mm ⁇ 14 mm. On the one hand, these radii of curvature achieve high strength, and on the other hand, they make production easier, for example when using a deep-drawing process.
- the profile contour of the tool connection device can have roundings, in particular at transitions between two adjacent contact surfaces.
- the radius of curvature of such transitions can, for example, lie in the areas mentioned above for the machine connection device, whereby the radius of curvature for the tool connection device can be essentially the same as the radius of curvature for the machine connection device or can deviate from it, in particular can be larger than it.
- the radius of curvature of such roundings can be the same (i.e. constant) at all points of the rounding or can be different (i.e. variable).
- two adjacent contact surfaces of the tool connection device enclose a certain angle, for example an interior angle of 120° or 210°, this is not necessarily to be understood as meaning that these two contact surfaces meet (in the geometrically exact sense) at exactly one point or at exactly one line/edge, but rather that there can be a rounding between them as described above.
- recess mentioned in feature (g) is to be understood in particular as a single recess, that is to say as a continuous recess (in particular a structurally closed recess that is separated from any other recesses that may be present) – sometimes also referred to as a discrete recess – and not as the sum of several individual (discrete) recesses.
- the term ‘circumference of the profile contour’ mentioned in feature g) means in particular the circumference that the profile contour of the tool connection device would have if it would also be continued in the area of the recess, in particular would be continued (if necessary regularly) as in areas in which the profile contour of the tool connection device has no recess or only much smaller recesses. If necessary, the term “circumference of the profile contour” (of the tool connection device provided with at least one recess) can also be understood to mean the circumference of the inner profile of the machine connection device, in particular at the height (in the axial direction) of the recess of the tool connection device.
- the profile contour of the tool connection device can therefore, for example, have the shape of an irregular hexagon in at least one, in particular several, in particular all, planes perpendicular to the axis of rotation - or have neither a hexagon nor a heptagon.
- reducing the number of projections may also result in a reduction in the moment of inertia, the mass and/or the material consumption of the tool device.
- the profile contour of the tool connection device substantially corresponds to the profile contour of the machine connection device over a first partial area and deviates from the profile contour of the machine connection device over a second partial area, wherein the profile contour of the tool connection device in the second partial area runs within a volume which is defined by the inner profile of the machine connection device.
- the profile contour of the tool connection device in a cross section perpendicular to the axis of rotation essentially represents part of a star-shaped polygon, wherein the star-shaped polygon has twelve outwardly projecting projections and twelve inwardly concave depressions.
- the profile contour of the tool connection device in the second partial area of the tool connection device runs in the same cross section perpendicular to the axis of rotation within this star-shaped polygon (or within the volume defined by the respective star-shaped polygons in the various radial planes of the tool connection device).
- the moment of inertia of the tool device is reduced because in the second partial area the inner profile runs closer to the axis of rotation than would be the case if the inner profile also followed the star-shaped polygon in the second partial area.
- within the volume defined by the inner profile of the machine connection device The section of the tool connection device that is to be inserted into the machine connection device runs within the volume of the machine connection device anyway.
- contact is created between the tool connection device and the machine connection device in at least several areas, namely point, line or surface contact, i.e. areas of the outer profile of the tool device touch the inner profile of the machine connection device at points or in areas.
- within the volume means that the relevant area of the outer profile of the tool device runs at a distance from the inner profile of the machine connection device, i.e. on a smaller radius in relation to the axis of rotation.
- the distance is in particular a distance that is greater than a microscopically small distance, for example a distance that is at least 0.1 mm in at least some areas.
- the profile contour of the tool connection device in the second partial region connects two outward-facing projections by a substantially flat surface or a curved surface.
- the moment of inertia of the tool device can also be reduced by such a flat or curved surface - not only because the profile contour of the tool connection device, as described above, runs closer to the axis of rotation, but also because such a curved and in particular such a flat surface can represent a more direct connection or "shortcut", the course of which can be shorter than a course along the star-shaped polygon. With the same wall thickness and the same starting material, a shorter course also results in a lower weight of the tool device. This can also result in material savings.
- a profile contour with outward-facing projections and inward-facing depressions is particularly advantageous in terms of mechanical stability, i.e. the operational strength and/or the rigidity of the tool connection device.
- the term operational strength refers to the ability of the tool to withstand the loads that occur for the projected service life
- rigidity refers to the resistance of the tool to deformation, in particular elastic deformation, caused by a force or moment that occurs.
- a design in which the profile contour of the tool connection device in the second partial area connects two outward-facing projections by an essentially flat surface or a curved surface is therefore particularly suitable for applications in which only a reduced load is to be expected, for example when machining a workpiece for which only low machining forces are required due to the material.
- the profile contour can also have outward-facing projections and inward-facing recesses in the second partial area, but on a smaller radius than in the first partial area.
- the profile contour of the tool connection device in the second partial region can connect the two contact surfaces of this single projection by at least three essentially flat surfaces or by at least one essentially curved surface or by at least one essentially flat surface and at least one essentially curved surface.
- Such embodiments are also particularly suitable for applications in which only a reduced load is to be expected.
- the mechanical stability or load-bearing capacity of the tool device can be increased by the at least one additional projection.
- the profile contour of the tool connection device essentially matches the profile contour of the machine connection device over a first partial area and deviates from the profile contour of the machine connection device over a second partial area, wherein the profile contour of the tool connection device in the second partial area is within a volume which is defined by the inner profile of the machine connection device.
- the profile contour of the tool connection device in the second partial area can have more outward-facing projections than the machine connection device has concave depressions.
- a reduction in the moment of inertia, the mass and/or the material consumption can be achieved if necessary. Because the profile contour of the tool connection device deviates from the profile contour of the machine connection device in at least two, in particular at least three, areas offset by the circumference of the profile contour, a more even weight distribution can also be achieved in the area of the tool connection device than would be the case if the profile contour of the tool connection device deviated from the profile contour of the machine connection device in only one area of its circumference.
- the regions in which the profile contour of the tool connection device substantially matches the profile contour of the machine connection device define a plurality of first sub-regions and the regions in which the profile contour of the tool connection device deviates from the profile contour of the machine connection device define a plurality of second sub-regions, wherein the profile contour of the tool connection device in the second sub-regions runs within a volume that is defined by the inner profile of the machine connection device.
- the profile contour of the tool connection device in: exactly one of the second sub-regions or at least one of the second sub-regions or several of the second sub-regions or several, but not all, of the second sub-regions or all of the second sub-regions in a first cross section perpendicular to the axis of rotation it essentially corresponds to the profile contour of the machine connection device and in a second cross section perpendicular to the axis of rotation which is different from the first cross section it deviates from the profile contour of the machine connection device.
- the profile contour of the tool connection device in the first cross section, also follows or corresponds to the profile contour of the machine connection device in one, several or all of the second sub-areas and thus has one or more outward-facing projections and possibly concave depressions in this/these sub-areas - corresponding to the twelve convex projections projecting inwards towards the axis of rotation and twelve concave depressions of the inner profile of the machine connection device.
- the profile contour of the tool connection device in the second, different cross section does not follow or correspond to the profile contour of the machine connection device.
- the profile contour of the tool connection device may not be conical in at least one or more of the second sub-areas, but may run parallel to the axis of rotation.
- the deviation of the profile contour of the tool connection device from the profile contour of the machine connection device can therefore affect individual areas of the circumference as a whole (i.e. over the entire axial extension of the tool connection device), or only individual axial areas of this entire axial extension.
- the profile contour of the tool connection device can first run conically in a second partial area (in particular following the profile contour of the machine connection device) and then parallel to the axis of rotation.
- Feature c therefore allows designs in which, in some angular ranges (relative to the axis of rotation), the profile contour of the tool connection device follows the inner profile of the machine connection device over several or all cross-sections and not in other angular ranges.
- Feature c) also allows designs in which the profile contour of the tool connection device is essentially conical in some or even all angular ranges, but with a different opening angle than the machine connection device, e.g. with a smaller opening angle.
- the opening angle is considered to be twice the angle between the axis of rotation and a tangential plane at a point on the profile contour of the tool connection device or the machine connection device.
- the opening angle of the profile contour of the tool connection device can also differ from the opening angle of the profile contour of the machine connection device in that the cross-section of the tool connection device in a plane further away from the machine tool (perpendicular to the axis of rotation) - i.e.
- a plane further down - is smaller than in a plane closer to the machine tool (perpendicular to the axis of rotation) - i.e. a plane further up.
- the opening angle of the profile contour of the tool connection device can then be smaller or larger than the opening angle of the profile contour of the machine connection device, or the same size.
- the profile contour of the tool connection device deviates from the profile contour of the machine connection device in exactly one of the second partial regions or at least one of the second partial regions or several of the second partial regions or several, but not all, of the second partial regions or all second partial regions in all cross sections perpendicular to the axis of rotation.
- Feature c) therefore allows, among other things, designs in which the profile contour in one or more sub-areas in all cross-sections perpendicular to the axis of rotation corresponds to the profile contour of the machine connection device and in one or more further sub-areas in some, but not all, cross-sections perpendicular to the axis of rotation corresponds to the profile contour of the machine connection device and in one or more further sub-areas in all cross-sections perpendicular to the axis of rotation deviates from the profile contour of the machine connection device.
- the profile contour of the tool connection device can in turn run within the volume defined by the inner profile of the machine connection device. In this way, a reduction in the moment of inertia, the mass and/or the material consumption of the tool device can be achieved if necessary.
- the profile contour of the tool connection device in at least a first cross section perpendicular to the axis of rotation essentially matches the profile contour of the machine connection device. This can be the case, for example, at the upper axial end of the tool connection device.
- the profile contour of the tool connection device deviates from the profile contour of the machine connection device due to its course parallel to the axis of rotation.
- the cross section perpendicular to the axis of rotation in which the profile contour of the tool connection device essentially matches the profile contour of the machine connection device, is not located at the upper axial end of the tool connection device, but for example at an axial position between the upper and lower ends of the tool connection device.
- the profile contour of the tool connection device deviates from the profile contour of the machine connection device in all cross sections perpendicular to the axis of rotation.
- the deviation in all cross sections perpendicular to the axis of rotation could, for example, manifest itself in such a way that the cross section or cross sections of the profile contour of the tool connection device matches the cross section or cross sections of the machine connection device over one or more angular ranges and deviates from it in one or more other angular ranges, in particular within the cross section of the machine connection device.
- the profile contour of the tool connection device in these designs runs parallel to the axis of rotation.
- the profile contour of the tool connection device can in turn run within the volume defined by the inner profile of the machine connection device.
- a rotationally fixed connection between the tool connection device and the machine connection device can nevertheless be achieved if, at least in a cross section perpendicular to the axis of rotation, the profile contour of the tool connection device corresponds to or follows the profile contour of the machine connection device at least over a (sufficiently large) angular range and/or the tool connection device can touch the machine connection device at several points (distributed around the circumference).
- the course of the profile contour of the tool connection device is steeper than the course of the inner profile of the machine connection device.
- a different, in particular steeper, inclination of the profile contour of the tool connection device compared to the machine connection device can manifest itself, for example, in such a way that the smallest angle enclosed between one or more (tangential planes on one or more) contact surface(s) of the tool connection device and the axis of rotation is smaller than the smallest angle enclosed between one or more (tangential planes on one or more) inner profile surface(s) or machine contact surfaces of the inner profile of the machine connection device and the axis of rotation.
- feature e) also allows designs in which the profile contour of the tool connection device is essentially conical, but with a different opening angle than the machine connection device, e.g. with a smaller opening angle.
- the opening angle of the profile contour of the tool connection device can also deviate from the opening angle of the profile contour of the machine connection device in such a way that the cross-section of the tool connection device in a plane further away from the machine tool (perpendicular to the axis of rotation) - i.e. a plane further down - is smaller than in a plane closer to the machine tool (perpendicular to the axis of rotation) - i.e. a plane further up.
- the opening angle of the profile contour of the tool connection device can then be smaller or larger than the opening angle of the profile contour of the machine connection device, or the same size.
- the at least two recesses can be designed, for example, as through-holes or as depressions, in particular directed radially inwards. This in turn can achieve a reduction in the moment of inertia, the mass and/or the material consumption of the tool device.
- At least f) applies, at least one of the recesses is arranged between two adjacent contact surfaces.
- At least one of the recesses is arranged between two adjacent contact surfaces such that the two adjacent contact surfaces do not touch in at least one, in particular several, in particular all, cross sections perpendicular to the axis of rotation. In the latter case, the at least one recess therefore extends over the entire axial extent of one or both opposing edges of the contact surfaces. In contrast, the two adjacent contact surfaces touch in at least one, in particular several, cross sections perpendicular to the axis of rotation if the at least one of the recesses does not extend over the entire axial extent of one or both opposing edges of the contact surfaces.
- the at least one of the recesses in the circumferential direction of the circumferential profile contour of the tool connection device has a length LA and a contact surface adjacent to this recess has a length LK, wherein the ratio LK:LA is at least 4:3, preferably at least 5:3, preferably at least 2:1, preferably at least 5:2, preferably at least 3:1.
- a larger LK:LA ratio can improve the mechanical stability, i.e. the strength and/or rigidity of the tooling, and thus also its torque load capacity.
- a smaller LK:LA ratio can achieve a greater reduction in the moment of inertia, mass and/or material consumption.
- At least one, in particular several, in particular all, of the recesses is/are arranged in the circumferential direction of the circumferential profile contour of the tool connection device at angular positions at which a projection of the tool connection device is provided. At these angular positions, the effect of the recesses with regard to reducing the moment of inertia can be particularly great.
- the profile contour of the tool connection device has at least one recess pointing radially inward.
- the at least one recess of the tool connection device can be arranged in particular between two adjacent contact surfaces or can be formed by two adjacent contact surfaces.
- At least one, in particular several, in particular all, of the recesses in the circumferential direction of the profile contour of the tool Connection device are arranged at angular positions at which a recess of the tool connection device is provided.
- At least one, in particular several, in particular all, of the recesses at an angular position of a projection of the tool connection device can have a greater length in the circumferential direction of the profile contour of the tool connection device than at least one, in particular several, in particular all, of the recesses at an angular position of a recess in the tool connection device.
- This can be advantageous in terms of manufacturing technology.
- a recess at an angular position of a projection of the tool connection device makes a greater contribution to reducing the moment of inertia than an (otherwise similar) recess at an angular position of a recess in the tool connection device.
- At least one, in particular several, in particular all, of the recesses at an angular position of a projection of the tool connection device can be substantially as large as at least one, in particular several, in particular all, of the recesses at an angular position of a recess of the tool connection device, or even smaller.
- the relatively large recess contributes particularly to reducing the moment of inertia and, where appropriate, also the mass and material consumption of the tool device.
- the recess extends in at least one plane perpendicular to the axis of rotation over at least 40%, in particular at least 45%, in particular at least 50% of the circumference of the profile contour of the tool connection device.
- this recess does not extend in any plane perpendicular to the axis of rotation over at least 50%, in particular at least 45%, in particular at least 40% of the circumference of the profile contour of the tool connection device, if such a plane is considered on its own.
- the recess can in this case extend over various planes running perpendicular to the axis of rotation.
- the course of the recess in the circumferential direction can, for example, have one or more kinks, waves or a zigzag structure, etc. Similar to feature g), in designs where at least h) applies, a relatively small range of conformity (and thus a relatively large range of deviation) contributes particularly to a reduction in the moment of inertia and, where appropriate, also in the mass and material consumption.
- the profile contour of the tool connection device deviates in the at least one deviation region from the inner profile of the machine connection device in that the profile contour of the tool connection device is set back radially inward with respect to the inner profile of the machine connection device to the axis of rotation, in particular runs on a smaller radius or smaller radii than a corresponding region of the inner profile of the machine connection device and/or the profile contour of the tool connection device has a different inclination to the axis of rotation with respect to the inner profile of the machine connection device, in particular runs parallel to the axis of rotation and/or the profile contour of the tool connection device has a recess and/or the profile contour of the tool connection device has a stepped structure.
- stepped structure is to be understood in particular to mean that the profile contour of the tool connection device does not run essentially uniformly from one axial end of the contact surfaces to another axial end of the contact surfaces, but has at least one step in between.
- step is understood to mean a significant change in the angle in a direction towards the axis of rotation, which is followed by a corresponding counter-change in the angle of inclination.
- a first, in particular lower, region of the contact surface encloses an angle of 70° with a plane perpendicular to the axis of rotation, while another, in particular upper, region of the contact surface encloses an angle of 50° with a plane perpendicular to the axis of rotation.
- a stepped structure can also have one or more sections in which the tool connection device runs (essentially) perpendicular to the axis of rotation.
- a tool connection device with a stepped structure does not necessarily have to be stepped around the entire circumference, but can be stepped in some sections of the circumference and non-stepped in others.
- the tool connection device can have a first stepped structure in one or more sections of the circumference and a second stepped structure, different from the first stepped structure, in one or more other sections of the circumference.
- the profile contour of the tool connection device can have at least two discrete deviation areas, in particular at least three discrete deviation areas, and/or the profile contour of the tool connection device can have at least two discrete match areas, in particular at least three discrete match areas, and/or the profile contour of the tool connection device can deviate from the inner profile of the machine connection device in at least one deviation area in all planes running perpendicular to the axis of rotation, or the profile contour of the tool connection device can match the inner profile of the machine connection device in at least one deviation area in at least one, in particular in several, but not all, planes running perpendicular to the axis of rotation.
- the tool connection device can also have (significantly) more than three conformity areas and/or deviation areas, for example (at least) six, in particular (at least) twelve, in particular (at least) 24.
- the at least two contact surfaces, in particular all contact surfaces, of the tool connection device can extend between a first and a second end plane, which are arranged perpendicular to the axis of rotation and are spaced apart from one another, wherein the tool device can have a transition section which connects the tool connection device to the work area and which preferably adjoins the tool connection device, in particular substantially, at the level of the first end plane with respect to the axis of rotation, and wherein the tool device can have a cover section which extends from the outer profile of the tool connection device in the direction of the axis of rotation and which is located, in particular substantially, at the level of the second end plane with respect to the axis of rotation.
- the first end plane may be located at or near the lower axial end of the tool connection device and the second end plane may be located at or near the upper axial end of the tool connection device.
- a second aspect of the present disclosure relates to a tool device with at least one working area suitable for acting on a workpiece, which is intended for use with a machine tool, in particular a hand-held machine tool, wherein the machine tool has a rotary-oscillating drive shaft which moves at least 10 times per second in a first direction of rotation about a machine-fixed axis of rotation and then reverses the movement and moves in a second, opposite direction of rotation, wherein a machine connection device with an inner profile which widens conically in the direction of the axis of rotation is arranged on this drive shaft and coaxially thereto, which has a profile contour running around the axis of rotation with a number of twelve convex projections projecting inwards towards the axis of rotation and twelve concave depressions which form an uninterrupted, essentially continuously extending profile wall which are arranged essentially rotationally symmetrically about the axis of rotation, wherein this drive shaft has a holding device for holding the tool device, and wherein the tool device has a tool
- the tool device can therefore be manufactured with a smaller wall thickness td in the area of the cover section than the wall thickness tk in the area of the contact surfaces. This can also achieve a reduction in the moment of inertia, the mass and/or the material consumption of the tool device.
- the wall thickness tk in the region of the contact surfaces is measured: in a direction perpendicular to the corresponding contact surface, or in a direction that corresponds to a projection of a perpendicular to the corresponding contact surface onto a plane that is perpendicular to the axis of rotation. If the contact surfaces do not run parallel to the axis of rotation, these measurements result in a (possibly slightly) different wall thickness.
- the wall thickness tk in the area of the contact surfaces is defined as the mean value of all wall thicknesses in the area of the contact surfaces or as the maximum value of all wall thicknesses in the area of the contact surfaces or as the minimum value of all wall thicknesses in the area of the contact surfaces.
- These embodiments take into account in particular that the wall thickness in the area of the contact surfaces is not necessarily constant over all areas of the contact surfaces.
- An average value of all wall thicknesses in the area of the contact surfaces can be defined as a median, for example, or determined as a weighted average value, for example by integrating the wall thicknesses over all contact surfaces and dividing the result of this integration by the total area of the contact surfaces.
- the wall thickness td in the region of the cover section is measured in a direction parallel to the axis of rotation and is preferably defined as the average value of all wall thicknesses in the region of the cover section or as the maximum value of all wall thicknesses in the region of the cover section or as the minimum value of all wall thicknesses in the region of the cover section or as the wall thickness at the radially innermost point of the cover section.
- the wall thickness tk in the region of the contact surfaces is at least 10% or 20% or 30% greater than the wall thickness td in the region of the cover section. Or expressed conversely, the wall thickness td in the region of the cover section is at least 10% or 20% or 30% smaller than the wall thickness tk in the region of the contact surfaces.
- the wall thickness td in the area of the cover section is between 1 mm and 1.5 mm.
- other dimensions are also possible.
- the cover portion has at least one, in particular central, opening.
- the hook devices disclosed in WO 2015/014468 A1 can pass through this opening in the cover section in order to hold the tool device on a machine tool as described in this publication.
- the cover section can have further recesses or keying devices, such as areas raised in the axial direction (i.e. pointing upwards away from the first end plane), or depressions (i.e. areas in the cover section whose surface is closer to the first (lower) end plane than is the case with surrounding areas of the cover section) or through holes.
- keying devices can serve to ensure that certain tool devices can only be used with certain machine tools, for example by certain machine tools having complementarily shaped keying devices in the machine connection device. On the other hand, such keying devices can also ensure compatibility with certain machine tools.
- the profile contour of the tool connection device has a stepped structure.
- the stepped structure can in particular have several steps.
- the contact surfaces for different steps of the tool connection device can have a different inclination in relation to the axis of rotation.
- the profile contour of the tool connection device can have different cross sections, in particular in the case of contact surfaces running parallel to the axis of rotation, in a plane perpendicular to the axis of rotation.
- a third aspect of the present disclosure relates to a machine tool and tool device combination, comprising: a tool device as described above and a machine tool, wherein the machine tool has a rotary-oscillating drive shaft which moves at least 10 times per second in a first direction of rotation about a machine-fixed axis of rotation and then reverses the movement and moves in a second, opposite direction of rotation, and wherein on this drive shaft and coaxially there is arranged a machine connection device with an inner profile which widens conically in the direction of the axis of rotation, which has a profile contour running around the axis of rotation with a number of twelve convex projections projecting inwards towards the axis of rotation and twelve concave depressions which form an uninterrupted, essentially continuously extending profile wall which are arranged essentially rotationally symmetrically about the axis of rotation, wherein this drive shaft has a holding device for holding the tool device.
- a fourth aspect of the present disclosure relates to a method for producing a tool device as described above, the method to produce the profile contour of the tool connection device, it has a primary forming, forming or generative process step or a combination of several such process steps, which are selected from a group consisting of forging, indenting, rolling, extruding, folding, deep drawing, beading, flanging, straightening, bending, stretching, upsetting, sintering, casting, layer-by-layer application, and/or to produce a recess or opening, it has a separating process step, preferably a thermally separating or a mechanically separating process step, or a combination of several such process steps, which are selected from a group consisting of sawing, grinding, milling, punching, shearing, particle beam cutting, electron beam cutting, laser beam cutting, plasma cutting, flame cutting, spark erosion cutting.
- the tool device or at least its external shape, can be produced completely or predominantly by means of a generative manufacturing process.
- the method comprises the following steps:
- step C) machining the substantially flat region of the workpiece to produce the profile contour of the tool connection device, wherein step C) is carried out after steps A) and B).
- At least one recess or opening is created before the profile contour of the tool connection device is produced from the initially essentially flat area of the workpiece. This can simplify the manufacturing process.
- the recess or opening produced in step B) forms a recess or opening in the profile contour of the tool connection device, in particular between two adjacent contact surfaces, in particular in the region of an outwardly pointing projection and/or an inwardly concave depression of the profile contour of the tool connection device.
- step B) it can be provided that recesses or openings are provided both in the area of an outwardly facing projection and in the area of an inwardly concave Indentations in the profile contour of the tool connection device can be formed. These can, for example, initially be the same size. However, the processing in step C) can result in a recess or opening in the area of an outward-facing projection ultimately being larger (in the circumferential direction) than a recess or opening in the area of an inward-facing concave depression in the profile contour of the tool connection device.
- the recesses or openings in step B) can initially be produced with different sizes (in the circumferential direction).
- a recess or opening that is provided in the finished tool device in the area of an outward-facing projection can initially be made smaller than a recess or opening that is provided in the finished tool device in the area of an inward-facing concave depression of the profile contour of the tool connection device.
- the size of the recesses or openings can change, in particular change differently, for example in such a way that the recesses or openings initially produced with different sizes (in the circumferential direction), in particular on the projections or depressions of the profile contour of the tool connection device, assume essentially the same size (in the circumferential direction).
- Steps A), B) and C) can be carried out in the order given. Instead of carrying out steps A), B) and C) sequentially, methods are also conceivable in which steps A) and B) are carried out essentially simultaneously, for example with the aid of a corresponding mold in which not only the (initially flat) outer contour of the tool device or the tool device as a whole is formed, but also the recesses or openings at the same time. In this variant too, however, step C) is only carried out after steps A) and B).
- Fig. 1 is an exemplary perspective view of a machine connection device according to the prior art.
- Fig. 2 is a perspective view of a tool connection device according to an embodiment of the present invention.
- Fig. 3 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 4 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 5 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 6 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 7 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 8 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 9 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 10 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 11 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 12 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 13 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 14 shows a cross section of an inner profile of a machine connection device and an outer profile of a tool connection device in a plane perpendicular to the axis of rotation according to an embodiment of the present invention.
- Fig. 15 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 16 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 17 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 18 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 19 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 20 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 21 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 22 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 23 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 24 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 25 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 26 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 27 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 28 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention, partly also a side view.
- Fig. 29 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention, partly also a side view.
- Fig. 30 is a cross-section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 31 shows a cross section of a machine connection device and a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention, partly also a side view.
- Fig. 32 shows in cross section a detailed view of a profile wall of a tool connection device in a plane parallel to the axis of rotation according to an embodiment of the present invention.
- Fig. 33 is a plan view of a workpiece for producing a tool connection device according to an embodiment of the present invention.
- Fig. 34 is a plan view of a tool connection device made from the workpiece of Fig. 33 according to an embodiment of the present invention.
- Fig. 35 is a plan view of a tool device according to an embodiment of the present invention.
- Fig. 36 is a side view of a machine tool and tooling combination according to an embodiment of the present invention.
- Fig. 37 shows a process flow of a method for producing a tool connection device according to an embodiment of the present invention.
- Fig. 1 shows an exemplary perspective view of a machine connection device 40 according to the prior art.
- Fig. 1 is taken from WO 2015/014468 A1.
- the machine connection device 40 is attached to the lower end of a drive shaft 41 of a machine tool 50 (Fig. 36) or forms an integral component with the drive shaft 41.
- the drive shaft 41 and thus also the machine connection device 40 perform oscillating movements about the axis of rotation 10, wherein the axis of rotation 10 coincides with the longitudinal axis of the drive shaft 41.
- the machine connection device 40 is limited at its (axial) lower end by a lower end surface 49.
- An upper end surface 48 of the machine connection device is located at an axial distance from the lower end surface 49.
- the machine connection device 40 has a profile wall 42a which has an annular basic shape, wherein the radially outer side is cylindrical in the example shown. Within the annular machine connection device 40 there is a cavity or recess with a volume defined by the machine connection device 40.
- the essentially annular profile wall 42a forms a closed ring, i.e. it is not interrupted, although variants are also conceivable in which the profile wall 42a has one or more interruptions, i.e. it does not extend 360°.
- the annular profile wall 42a has an inner profile with a profile contour 42 that runs around the rotation axis 10.
- This profile contour 42 extends essentially between the lower end surface 49 and the upper end surface 48.
- the inner profile or the profile contour 42 widens conically in the direction of the rotation axis 10, in such a way that the area with the smaller inner diameter is closer to the machine tool (or closer to the upper end surface 48) and the area with the larger inner diameter is at a greater distance from the machine tool (or closer to the lower end surface 49).
- cross sections of the profile contour 42 in planes perpendicular to the axis of rotation 10 do not have a circular inner diameter - at least for the most part or at most axial positions - but resemble a star-shaped polygon with a number of twelve convex projections 44 projecting inwards towards the axis of rotation 10 and twelve concave depressions 45.
- the inner profile 42 has two machine contact surfaces 43, whereby in the example shown there are rounded transitions (without reference numerals) between each two adjacent machine contact surfaces 43, i.e. at the angular positions of the projections 44 and the depressions 45.
- the course of the inner profile 42 with the machine contact surfaces 43 and the rounded transitions in between could also be described as wave-shaped.
- the machine contact surfaces 43 enclose an angle other than 90° with a radial plane. They are therefore inclined with respect to the axis of rotation 10.
- the machine contact surfaces 43 are intersected by an infinitely large number of axial planes (i.e. planes which enclose the axis of rotation 10). Without loss of generality, we now consider a specific axial plane (not shown in the figures).
- the machine connection device 40 also has two holding devices or hook devices 46 which are pivotally mounted about an axis perpendicular to the rotation axis 10. This pivot axis is located in the area of or slightly above the upper end surface 48.
- a STARLOCK® tool device can be attached to or removed from the machine connection device 40.
- a STARLOCK® tool device can be held on the machine connection device 40 by the interaction of the holding devices 46 and the profile wall 42a.
- the machine tool 50 and the tool device 30 (Fig. 36) then form a machine tool and tool device combination 55 and can be used as intended for sawing, grinding, scraping, etc.
- WO 2015/014468 A1 and WO 2015/014469 A1 contain further details regarding possible embodiments of the machine tool 50 and the holding devices 46. Express reference is made to these publications here. It should be noted that holding devices are also possible that have only a hook device 46 or another type of fastening, for example a screw, as is also described in WO 2015/014468 A1.
- Fig. 36 shows a machine tool and tool device combination 55. In addition to the details described above, Fig. 36 shows that the tool device 30 has a working area 21. In the example shown, this is located at one end of the tool device 30 which is opposite the end of the tool device 30 with which it is attached to the machine tool 50. Alternative embodiments are also possible in which the tool device 30 has several working areas 21 which are separate from one another.
- the tool device 30 has a transition section 7.
- the rotary-oscillating movement is transmitted to the working area 21 through this transition section 7.
- the transition section 7 can also be viewed as a flange or have one, as will be described in more detail below. This flange 7 can also extend in the opposite direction with respect to the working area 21 beyond the tool connection device, as is indicated in Fig. 36 at the right end of the tool device 30.
- Fig. 2 shows a perspective view of a tool connection device 1 according to an embodiment of the present invention.
- the tool connection device 1 is essentially constructed in two axially spaced planes, namely a first or lower end plane 18 and a second or upper end plane 19, with a profile wall 2a which is arranged between these axially spaced planes 18, 19 or extends between them.
- the tool connection device 1 has a flange 7 or transition section 7 in the area of the lower end plane 18.
- the outer circumference of this flange 7 is (circular) round in Fig. 2, whereby the flange 7 can also take on other shapes on its outer circumference in other embodiments.
- the flange 7 has twelve recesses 9 evenly distributed in the circumferential direction. As indicated in Fig. 2 by a dashed circle in the area of the flange 7, these recesses 9 lie on a (fictitious) circle arranged concentrically with respect to the outer circumference of the flange 7. In other embodiments, a different number of such recesses 9 and a different arrangement thereof are also possible.
- the recesses in the flange 7 can serve to attach the flange 7 to a Plate 28 (Fig. 35) must be secured, for example by screwing, riveting, welding, etc.
- the plate 28, the flange 7 and/or the tool connection device 1 can be made of hardened sheet steel, for example, although other sufficiently stable materials are also conceivable. As shown in Fig. 35, the plate 28 together with the tool connection device 1 and the flange 7 forms the tool device 30. The working area 21 is arranged at the right end of the plate 28 in Fig. 35.
- the plate 28 may be substantially planar (having a planar top surface and a parallel, spaced-apart planar bottom surface), although this is not mandatory.
- the plate 28 may be angled at one or more locations.
- Fig. 2 shows the tool connection device 1 (together with the flange 7 arranged thereon) as an independent component which, according to Fig. 35, can be connected to a plate 28 which is initially separate from it
- the tool connection device 1, the flange 7 and the plate 28 can also be designed as an integral component (i.e. in one piece).
- the entire tool device 30 can be provided in one piece.
- the recesses 9 in the flange 7 can be omitted.
- the flange 7 is not designed as a continuous, closed disk, but has a (central) recess (without reference number) in the form of a star-shaped polygon with twelve projections pointing (radially) outwards and twelve depressions pointing (radially) inwards. Above this central recess, Fig. 2 shows a raised area that forms the tool connection device 1.
- the tool connection device 1 has a cover section 6 at its upper end (in the area of the upper end plane 19).
- the cover section 6 also forms a star-shaped polygon with twelve outward-facing projections and twelve inward-facing recesses on its outer circumference, the star-shaped polygon formed by the cover section 6 being smaller than the star-shaped recess in flange 7.
- the hook devices 46 shown in Fig. 1 can reach through the central opening 20 or one or more other holding devices of a Machine tool 50 extend through the central opening 20 in order to hold the tool connection device 1 or the entire tool device 30 on the machine tool 50.
- the axis of rotation 10 not only runs centrally through the drive shaft 41 of the machine tool 50, but also centrally through the opening 20 of the tool connection device 1.
- the axis of rotation 10 is perpendicular to the cover section 6.
- the central opening 20 in the cover section 6 can, for example, have a round, in particular circular, shape, although other shapes are also possible.
- the central opening 20 has a round basic shape, onto which eight outward-pointing bulges or arms are formed.
- the cover section 6, as shown in Fig. 2 can have further recesses in addition to the central opening 20, which are explained in more detail below.
- a profile wall 2a of the tool connection device 1 is arranged in the area between the flange 7 and the cover section 6 or extends in this.
- the profile wall 2a defines 24 contact surfaces 3, which also follow the star-shaped course of the opening in the flange 7 or the star-shaped edge of the cover section 6.
- the transitions between the cover section 6 and the contact surfaces 3 or between the contact surfaces 3 and the flange 7 can have rounded areas 8.
- the outward-facing contact surfaces 3 of the tool connection device 1 are intended to enable (positive) contact with the inward-facing machine contact surfaces 43, preferably at least partial surface contact.
- the contact surfaces 3 of the tool device 30 are arranged at least substantially in accordance with the course of the machine contact surfaces 43.
- An outward-facing normal vector on a point of the contact surface 3 thus encloses an angle other than zero with a radial plane.
- such a normal vector lies on a Straight lines that do not intersect the axis of rotation 10. This straight line therefore also encloses an angle other than zero with an axial plane on which this point lies.
- the tool device 30 is (at least substantially) connected in a rotationally fixed manner to the drive shaft 41 of the machine tool 50.
- the contact surfaces 3 in the embodiment according to Fig. 2 and also in all other embodiments described here can be (essentially) flat or curved in one direction or in multiple directions.
- the term “curved in one direction” refers to a surface that is curved in only one direction at every point on the surface, e.g. a cylindrical surface.
- the term “curved in multiple directions” refers to a surface that is curved in multiple directions at at least one point on the surface, e.g. a spherical surface. Mixed forms are also conceivable, so that a contact surface 3 can, for example, be flat in one area, curved in one direction in another area and curved in multiple directions in another area.
- two adjacent contact surfaces 3 each form a projection 4 pointing (radially) outwards or a recess 5 set back (radially) inwards.
- adjacent contact surfaces 3 do not touch each other in the embodiment according to Fig. 2.
- a recess 9a or 9b in the circumferential direction of the profile wall 2a
- the recesses 9a in the area of a projection 4 have a greater length (in the circumferential direction of the profile wall 2a) than the recesses 9b in the area of a recess 5.
- the recesses 9a and 9b it is also possible for the recesses 9a and 9b to all have, for example, the same length in the circumferential direction of the profile wall 2a.
- Figures 3 to 14 which can be viewed as variants of the tool connection device 1 of Figure 2.
- Most of Figures 3 to 14 show only one section in a radial plane in the area of the contact surfaces 3, i.e. at an axial position that is located between the rounded portions 8 at the transition to the cover section 6 or the flange 7.
- the tool connection devices 1 can have corresponding or similar sections, but - due to the conical design of the profile wall 2a - with a correspondingly larger or smaller diameter.
- the sectional view of Fig. 3 shows the machine connection device 40 or its profile wall 42a in a cross section perpendicular to the axis of rotation between the outer circle shown in dashed lines, which indicates the cylindrical outer surface of the machine connection device 40, for example, and the outer star-shaped polygon of Fig. 3.
- the inside of this outer star-shaped polygon represents the profile contour or the inner profile 42 of the machine connection device 40, on which machine contact surfaces 43 are arranged.
- Fig. 3 also shows the tool connection device 1 or its profile wall 2a between the two inner star-shaped polygons in a cross section perpendicular to the axis of rotation.
- the outside of the outer of these two inner star-shaped polygons represents the profile contour or the outer profile 2 of the tool connection device.
- the innermost star-shaped polygon shown in dashed lines indicates the inside of the profile wall 2a.
- the profile contour 2 of the tool connection device 1 has 24 contact surfaces 3 as well as twelve outward-facing projections 4 and twelve inwardly recessed recesses 5.
- the profile contour 42 of the machine connection device 40 has twelve corresponding inward-facing projections 44 as well as twelve outwardly recessed recesses 45.
- the star-shaped polygons shown in solid lines i.e. the profile contour 2 of the tool connection device 1 and the profile contour 42 of the machine connection device 40, are shown in Fig. 3 at a certain distance from each other. This distance is only for clarity. In normal use, the both Profi I contours 2, 42, depending on the manufacturing tolerances at numerous points or in numerous surface areas, so that a positive connection is created between the tool connection device 1 and the machine connection device 40.
- Fig. 3 unlike in Fig. 2 - no recesses 9a, 9b are shown between adjacent contact surfaces 3. These can still be present, in particular in a radial plane that is different from the radial plane shown in the section.
- the profile contour 2 i.e. the outer profile of the tool connection device 1 corresponds at least substantially to the profile contour 42 (i.e. the inner profile of the machine connection device 40) in at least the radial plane shown and possibly also in other radial planes. In one or possibly several (not shown) radial planes, however, the profile contour 2 deviates from the profile contour 42.
- Figures 4 to 14 show further variants of the tool connection device 1 of Figures 2 and 3.
- the type of representation essentially follows that of Figure 3, whereby in the interest of a compact, clear representation, features already described are not described again and may not be provided with corresponding reference symbols again.
- Figures 4 to 14 the representation of the outside of the profile wall 42a of the machine connection device 40 (circle shown in dashed lines in Figure 3) and the inside of the profile wall 2a of the tool connection device 1 (polygon shown in dashed lines in Figure 3) has been omitted.
- the embodiment in Fig. 4 has a deviation region 13.
- the profile contour 2 of the tool connection device 1 does not follow or correspond to the profile contour 42 of the machine connection device 40.
- the profile contour 42 of the machine connection device 40 in this deviation region 13 has (only) one recess 45 formed by two machine contact surfaces 43 and set back to the outside
- the profile contour 2 of the tool connection device 1 in this deviation region 13 has two outward-facing projections 4 formed by a total of four contact surfaces 3 and an inwardly set back recess 5 between them.
- the profile contour 2 thus deviates from the profile contour 42 in this deviation region 13 - in this region it runs set back radially inwards at a distance from the profile contour 42, i.e.
- the profile contour 2 thus has a total of thirteen projections 4 and thirteen recesses 5.
- the variant shown in Fig. 5 has a larger deviation range 13 or three separate deviation ranges 13. While in this/these deviation range(s) 13 the profile contour 42 has three recesses 45 formed by a total of six machine contact surfaces 43 and set back to the outside, the profile contour 2 in this/these deviation range(s) 13 has six outward-facing projections 4 formed by a total of twelve contact surfaces 3 with corresponding recesses 5 formed between them.
- the profile contour 2 here again runs radially set back to the inside at a distance from the profile contour 42, i.e. within the volume defined by the profile contour 42.
- the deviation range 13 can be larger or smaller, or there can be more or fewer deviation ranges 13.
- the shape of the profile contour 2 is not limited to the shapes shown in Figures 4 and 5.
- the profile contour 2 has a projection 4 in the (or in a) deviation region 13, which has a different shape from other projections.
- the contact surfaces 3 of the profile contour 2 (measured in the radial plane shown) enclose an inner angle of (approximately) 120° at the outward-facing projections 4 and an inner angle of (approximately) 210° at the recesses 5, the embodiment of Fig. 6 also includes inner angles with other values. For example, at the recesses identified by the reference symbol 5, the inner angle is (approximately) 270°.
- other shapes of the profile contour 2 are also possible, in particular with other interior angles and/or with contact surfaces 3 of different sizes, etc.
- the outward-pointing projection of the profile contour 2, identified by the reference number 4 has an interior angle that is (substantially) less than 120°, namely approximately 60°.
- Fig. 8 shows two embodiments.
- the profile contour 2 of the tool connection device 1 predominantly matches the profile contour 42 of the machine connection device 40, namely in a first partial area or matching area 12.
- the profile contour 2 deviates from the profile contour 42 in that the profile contour 2 in this partial area 13 connects two outward-facing projections - the two upper projections identified by the reference number 4 - by a (substantially) flat surface 14a, although "in between" there is another recess 45 of the profile contour 42 of the machine connection device 40 that is set back to the outside.
- the profile contour 2 runs within the volume defined by the profile contour 42.
- the profile contour 2 has only eleven outward-facing projections 4 and ten inward-set recesses 5.
- a further projection 4 of the profile contour 2 is replaced by a (substantially) flat surface 14a, as indicated by a dashed line.
- the profile contour 2 has only ten projections 4 (or only nine projections 4 if the upper right one is not to be regarded as a projection because there is no recess 5 between it and the neighboring projections 4 (top left and right)).
- the profile contour 2 in this embodiment has only eight recesses 5.
- Fig. 9 shows an embodiment in which the profile contour 2 in a first partial area 12 again (essentially) matches the profile contour 42.
- This first partial area 12 extends with respect to the axis of rotation 10 over an angle ⁇ (here called the angle of agreement) of (approximately) 210°.
- ⁇ here called the angle of agreement
- part of the star-shaped profile contour 2 namely in a second partial area or deviation area 13, which extends over an angle ⁇ (here called the angle of deviation) of (approximately) 150°
- the profile contour 2 runs within the volume defined by the profile contour 42.
- the curved connecting surface 14b may or may not rest against the inward-facing projections 44 of the profile contour 42 of the machine connection device 40.
- second partial areas or deviation areas 13, in which the profile contour 2 deviates from the profile contour 42 can also be provided with intermediate first partial areas or areas of agreement 12, in which the Profile contour 2 (substantially) matches the profile contour 42.
- the second partial region(s) or matching regions 13 can be larger or smaller than shown in Fig. 9.
- the shape of the profile contour 2 in the second partial region 13, i.e. the curved connecting surface 14b, can deviate from the shape shown in Fig. 9.
- Fig. 10 shows a modification of Fig. 9.
- only one projection 4 of the profile contour 2 of the tool connection device 2 is provided, with two adjacent recesses 5.
- the area between the two recesses 5 forms a matching area or first partial area 12.
- first partial area 12 which extends over a matching angle ⁇ of (approximately) 30°
- the profile contour 2, i.e. the contact surfaces 3a and 3b (essentially) match the profile contour 42.
- the profile contour 2 i.e. the connecting surface 14b, deviates from the profile contour 42.
- the curved connecting surface 14b touches the profile contour 42 of the machine connection device 40 at least at the (or some) inward-facing projections 44, so that a positive connection is produced solely through the contact between the profile contour 2 of the tool connection device 1 and the profile contour 42 of the machine connection device 40 and thus the tool device 30 can be connected to the machine tool 50 in a rotationally fixed manner. If the curved connecting surface 14b does not touch the profile contour 42, a positive connection and a rotationally fixed connection between the tool device 30 and the machine tool 50 can still be produced by the tool device 30 being held on the machine tool 50 by the hook or holding device(s) 46 on the one hand and by there being contact between the profile contour 2 and the profile contour 42 in the matching area 12 on the other. For some applications, this can represent sufficient fastening of the tool device 30 to the machine tool 50.
- the embodiment according to Fig. 11 largely corresponds to the embodiment according to Fig. 10.
- the two (essentially flat) contact surfaces 3a and 3b are larger than is the case according to Fig. 10.
- the contact surfaces 3a and 3b only partially rest on the profile contour 42. Between these contact surfaces 3a and 3b, only one point of the star-shaped polygon remains, also provided with the reference number 4 in Fig. 11, although strictly speaking it is not an outward-pointing projection, because the profile contour 2 - at least in the section shown - does not have any recesses 5 set back inwards.
- the contact surfaces 3a and 3b are connected by a curved connecting surface 14b, analogous to Fig. 10.
- a curved connecting surface 14b analogous to Fig. 10.
- the curved connecting surface 14b also touches the profile contour 42 of the machine connection device 40 at least at the inward-facing projections 44, although this is not mandatory.
- Fig. 12 shows a further modification of the embodiment according to Fig. 3.
- the cross-section of the tool connection device 1 shown with solid lines forms a hexagon, which is not a regular hexagon, but one in which two opposite sides are significantly longer than the remaining sides.
- the tool connection device 1 On the four shorter sides, the tool connection device 1 has four contact surfaces 3a and 3b, on which the profile contour 2 of the tool connection device 1 (essentially) matches the profile contour 42 of the machine connection device 40, so that these areas represent areas of agreement 12.
- the (far larger) deviation areas 13 extend in the remaining sections of the circumference of the tool connection device 1 or the machine connection device 40.
- Fig. 12 also shows in dashed lines, as an example, the central opening 20 for fastening the tool device 30 to the machine tool 50, as well as two possible arrangements of the flange or transition section 7 and the working area 21.
- the transition section 7 extends approximately from the middle of one of the longer sides of the hexagon perpendicular to it outwards.
- the transition section 7 extends in the same orientation as the longer sides of the hexagon and forms, so to speak, an extension of the hexagon outwards.
- Other shapes, sizes and orientations of the profile contour 2 and the transition section 7 are also possible.
- Fig. 13 shows a modification of Fig. 12, whereby the profile contour 2 does not form a hexagon, but is curved in a kind of curved path compared to the embodiment according to Fig. 12 in such a way that the contact surfaces 3a and 3b lying opposite one another are not in contact with machine contact surfaces 43 lying symmetrically opposite one another with respect to the axis of rotation 10, but with machine contact surfaces 43 which are each offset by 150° with respect to the axis of rotation 10.
- areas of agreement 12 each extend over an angle of 30°.
- a larger of the two deviation areas 13 extends over an angle of 180°, a smaller one over an angle of 120°.
- the two areas of agreement add up to an angle of agreement of 60°
- the two deviation areas add up to an angle of deviation of 300°.
- a positive or rotationally fixed fastening between the tool device 30 and the machine tool 50 can possibly already be achieved by the contact on the contact surfaces 3a and 3b, possibly also by fastening the tool device 30 by means of the holding or hook devices 46 in the area of the central opening 20.
- the transition region 7 can also rest on the underside of the machine connection device 40, whereby the contact between the contact surfaces 3a or 3b and corresponding machine contact surfaces 43 is possibly improved when the tool device 30 is clamped against the machine connection device 40 by means of the holding or hook devices 46.
- Fig. 14 shows a further modification of the embodiment according to Fig. 12.
- the profile wall 2a is only in contact with corresponding machine contact surfaces 43 in the area of two adjacent contact surfaces 3a and 3b.
- a positive or rotationally fixed fastening between the tool device 30 and the machine tool 50 can possibly already be achieved by the contact on the contact surfaces 3a and 3b and the fastening of the tool device 30 by means of the holding or hook devices 46 in the area of the central opening 20.
- the transition region 7 can also lie on the underside of the machine connection device 40, whereby the contact between the contact surfaces 3a or 3b and corresponding machine contact surfaces 43 is possibly improved if the tool device 30 is clamped against the machine connection device 40 by means of the holding or hook devices 46.
- a deviation between profile contour 2 and profile contour 42 can also occur both in the circumferential direction (as explained in Figures 2 to 14) and in the axial direction (as explained below with reference to Figures 15 to 31).
- any deviation in the circumferential direction or any of the embodiments according to Figures 2 to 14 can be combined within the scope of the invention with any deviation in the axial direction or any of the embodiments according to Figures 15 to 31.
- a tool device 30 can have several types of deviations in the circumferential direction and/or several types of deviations in the axial direction, optionally in different cross sections and/or different angular ranges related to the axis of rotation 10.
- Fig. 15 shows a cross section of a machine connection device 40 and a tool connection device 1 in a plane parallel to the rotation axis 10 according to an embodiment of the present invention.
- the axis of rotation 10 runs vertically in the plane of the drawing in Fig. 15.
- the machine connection device 40 is arranged symmetrically or coaxially around the axis of rotation 10. Due to the inclination of the profile contour or the inner profile 42 of the machine connection device 40, the space under the machine connection device 40 forms a trapezoid in the cross section shown. Also shown are two hook devices 46 of the machine tool 50, which serve to attach the tool device 30 or to brace the outer profile 2 of the tool connection device 1 against the inner profile 42 of the machine connection device 40.
- the profile contour 2 of the tool connection device 1 is again shown at a certain distance from the profile contour 42 of the machine connection device 40 for the sake of clarity. In normal use, however, the profile contour 2 rests against the profile contour 42 at least in some areas.
- the tool device 30 has a flange or transition section 7, at one end of which a working area 21 is provided.
- the flange 7 is located (relative to the axis of rotation 10) in the area of a first (lower) end plane 18, which is indicated by a dashed line.
- the tool connection device 1 rises above the flange 7 with a profile wall 2a (shown here as a trapezoid) with a profile contour 2.
- the cover section 6, which also forms part of the tool connection device 1, adjoins the upper end of the profile wall 2a in the area of a second (upper) end plane 19, indicated by a dashed line.
- the cover section 6 has the central opening 20 described above, through which the hook devices 46 or other holding devices 46 extend.
- the profile contour 2 of the tool connection device 1 in the section shown in Fig. 15 essentially corresponds to the profile contour 42 of the machine connection device 40, this is not necessarily the case around the entire circumference of the tool connection device 1.
- the profile contour 2 can deviate from the profile contour 42, for example according to one of the examples shown in Figs. 2 to 14 or according to one of the examples described below in Figs. 16 to 31.
- the profile contour 2 of the tool connection device 1 does not run parallel to the profile contour 42 of the machine connection device 40, but (essentially) parallel to the rotation axis 10, over its entire axial extent. In this case, the profile contour 2 only rests against the machine connection device 40 at its upper end. This creates a recess 9 in the space (shown triangularly in Fig. 16) between the profile contour 2 and the profile contour 42. In Fig. 16 (right), however, the profile contour 2 runs as described with reference to Fig. 15.
- the profile contour 2 of the tool connection device 1 does not run parallel to the profile contour 42 of the machine connection device 40, but (in sections) parallel to the axis of rotation 10, although not over its entire axial extent. Instead, the profile contour 2 has a step 17, at which the profile contour 2 runs (essentially) in a radial plane.
- the step 17 can, for example, be arranged approximately in the middle between the lower and upper end planes 18, 19, or at another axial position. In this case, the profile contour 2 rests only at its upper end and at the level of the step 17 on the machine connection device 40.
- the profile contour 2 has two steps.
- the steps can divide the axial extension of the tool connection device 1 into axial sections of equal size or (as shown) different sizes.
- more than two steps are also possible. Otherwise, the previous explanations with respect to Fig. 17 (left) apply accordingly.
- the profile contour 2 also has a step 17. At this step 17, however, the profile contour 2 does not run in a radial plane, but merely changes its inclination. Above the step 17, the inclination of the profile contour 2 of the tool connection device 1 essentially corresponds to the inclination of the profile contour 42 of the machine connection device 40. Below the step 17, the profile contour 2 runs (essentially) parallel to the axis of rotation 10.
- the profile contour 2 again has a step 17.
- the profile contour 2 runs (essentially) in a radial plane.
- the inclination of the profile contour 2 changes at this axial position.
- the inclination of the profile contour 2 of the tool connection device 1 corresponds essentially to the inclination of the machine connection device 40.
- the profile contour 2 runs (essentially) parallel to the axis of rotation 10.
- the profile contour 2 has (relatively large) roundings 8 at its upper end. These extend over a larger area than any roundings that may be present at corresponding points at the upper end of the profile contour 42 of the machine connection device 40, i.e. the roundings 8 of the tool device 30 can have a larger radius of curvature than any roundings that may be present on the machine connection device 40. Below the roundings 8, the inclination of the profile contour 2 of the tool connection device 1 can essentially correspond to the inclination of the profile contour 42 of the machine connection device 40.
- the profile contour has a step 17.
- the inclination of the profile contour 2 of the tool connection device 1 essentially corresponds to the inclination of the profile contour 42 of the machine connection device 40.
- the profile contour 2 does not run parallel to the axis of rotation 10 (as was the case in Fig. 17, for example), but merely changes its inclination.
- the distance of the profile contour 2 from the axis of rotation 10 increases with increasing distance from the cover section 6.
- the profile contour 2 runs steeper than above.
- the opening angle of the tool connection device 1 in this section is smaller than the opening angle of the tool connection device 1 above the step 17 and also smaller than the opening angle of the corresponding section of the machine connection device 40.
- the profile contour also has a step 17.
- the inclination of the profile contour 2 of the tool connection device 1 essentially corresponds to the inclination of the profile contour 42 of the machine connection device 40.
- the profile contour 2 does not run in a radial plane and above step 17 it does not run parallel to the axis of rotation 10, but merely changes its inclination.
- the distance of the profile contour 2 from the axis of rotation 10 increases with increasing distance from the cover section 6.
- the profile contour 2 runs steeper than above.
- the opening angle of the tool connection device 1 in this section is larger than the opening angle of the tool connection device 1 below step 17 and also larger than the opening angle of the corresponding section of the machine connection device 40.
- the profile contour has a step 17.
- the inclination of the profile contour 2 of the tool connection device 1 essentially corresponds to the inclination of the profile contour 42 of the machine connection device 40.
- the profile contour 2 does not run parallel to the axis of rotation 10, but changes its inclination. In contrast to the example in Fig. 20 (left), however, in this section the distance of the profile contour 2 from the axis of rotation 10 decreases with increasing distance from the cover section 6.
- the profile contour does not have a step 17.
- the inclination of the profile contour 2 of the tool connection device differs from the inclination of the profile contour 42 of the machine connection device 40 in that the distance of the profile contour 2 from the axis of rotation 10 decreases with increasing distance from the cover section 6. In this case, the profile contour 2 only rests on the machine connection device 40 at its upper end.
- the embodiment shown in Fig. 22 differs from that of Fig. 15 in that the profile wall 2a on the left side has a shorter axial extension than on the right side.
- the profile wall 2a on the left side does not protrude beyond the Machine connection device 40 (downwards).
- the profile wall 2a can also be shortened at other points on the circumference, in particular at the same level as on the very left, as indicated by a line in which dots and dashes alternate. Only in the area on the right, near the transition section 7, does the axial extent of the profile wall 2a increase.
- the axial extent of the profile wall 2a can increase steadily around the circumference up to the area of the transition section 7, as indicated by the diagonal dashed line.
- Fig. 23 can be seen as an extreme case of the embodiment according to Fig. 22.
- the tool device 30 has no profile wall 2a at all that runs below the cover section 6. This means that due to the finite material thickness of the cover section 6, the axial extension of the cover section 6 at its left edge represents the profile wall 2a.
- the cover section 6 (the "profile contour 2") may only rest on the machine connection device 40 at its upper end, in particular if the left edge of the cover section 6 runs parallel to the axis of rotation 10.
- Fig. 23 also shows a variant in a separate circle that shows an enlarged section at the left end of the cover section 6 (see small circle).
- a profile wall 2a can rise, the height of which increases to the right.
- the height of the profile wall 2a can, for example, increase evenly (in the circumferential direction), as indicated by a diagonal dashed line.
- the height of the profile wall 2a can also increase in a non-uniform manner, as indicated by a line in which dots and dashes alternate.
- Fig. 24 an embodiment is indicated that can essentially correspond to that of Fig. 13.
- the cover section 6 does not extend to the very left of the inclined profile contour 42 of the machine connection device 40. Instead, contact surfaces 3a and 3b are formed on the cover section 6, namely at locations that correspond to the positions of the contact surfaces 3a and 3b in Fig. 13.
- the tool connection device 1 can be supported on the machine connection device 40 by means of these contact surfaces.
- the tool connection device 1 can be supported on the machine connection device 40 in the area to the right, i.e. in the direction of the transition section. Connecting device 40 can be supported.
- a profile wall 2a can rise in the direction of the transition section 7 (i.e. to the right), the height of which increases to the right.
- the height of the profile wall 2a can, for example, increase evenly (in the circumferential direction), as indicated by a diagonal dashed line.
- Fig. 25 illustrates an embodiment that can be viewed as a variant of Fig. 24 and has already been explained in connection with Fig. 13.
- the profile contour 2 of the tool connection device 1 in the right half is less steep than the profile contour 42 of the machine connection device 40.
- a positive connection between the tool device 30 and the machine tool 50 can result from the contact surfaces 3a and 3b resting on the profile wall 42a and the tool device 30 being held on the machine tool 50 by means of hooks or other holding devices 46.
- the flange 7 can also rest on the underside of the machine connection device 40, as already described.
- the profile contour 2 of the tool connection device 1 can essentially match the profile contour 42 of the machine connection device 40 (at least in sections).
- the wall thickness (i.e. thickness) td in the area of the cover section 6 differs from the wall thickness tk in the area of the contact surfaces 3 or the profile contour 2.
- the wall thickness tk can be greater than the wall thickness td, for example at least twice as large.
- the wall thickness tk in the area of the contact surfaces 3 or the profile contour 2 can also be greater than the wall thickness td in the area of the cover section 6.
- the profile wall 2a can be double-walled, with an inner wall 22 and an outer wall 23. In the part of Fig. 27 shown on the left, these run essentially parallel to each other and also parallel to a machine contact surface 43.
- the material thickness of the inner wall 22 and the outer wall 23 can be the same or different and also the same or different compared to the wall thickness td of the cover section 6.
- the wall thickness tk is the total thickness of the profile wall 2a, i.e.
- the Wall thickness tk can be measured in a radial plane, as indicated by the upper double arrow in the left half of Fig. 27. However, the wall thickness tk can also be measured in a direction perpendicular to a corresponding contact surface 3, as indicated by the lower double arrow in the left half of Fig. 27. This results in (slightly) different values for the wall thickness tk.
- the outer wall 23 runs parallel to a machine contact surface 43, but the inner wall 22 does not.
- the inner wall 22 can, for example, run parallel to the axis of rotation 10.
- the wall thickness tk can be defined, for example, as the minimum value or maximum value of all wall thicknesses in the area of the contact surfaces 3 or, as indicated in Fig. 27, as an average value.
- the machine connection device 40 is shown in cross section as in the previous figures, while the tool connection device 1 is shown in a side view. Accordingly, the profile wall 2a of the tool connection device 1 is shown with several contact surfaces 3 and alternating, outward-facing projections 4 and inwardly recessed recesses 5 located between them.
- Several types of recesses 9 are shown in the profile wall 2a. These can represent different embodiments, but two or more different recesses 9 can also be provided in the profile wall 2a of a single embodiment.
- a recess 9 can be designed, for example, in a zigzag manner (left), as a strip (middle) or round/oval (right).
- a single recess 9 can be limited to one contact surface 3 or extend over two or more contact surfaces 3.
- Fig. 29 shows further examples of recesses 9 in a profile wall 2a, which may have a wave shape or a kink.
- profile contour 2 of the profile wall 2a according to Fig. 28 or 29 is interrupted in its course by the recesses 9 and thus deviates from a profile contour 42 of the machine connection device 40 at least at the level of the recesses 9, the profile contour 2 can, if necessary, correspond to the profile contour 42 of the machine connection device 40 at other axial positions, i.e. outside the recesses 9.
- Fig. 30 shows features that can be combined with any of the other embodiments described here.
- the cover section 6 a recess 25, i.e. a downward-facing depression.
- the cover section 6 has a raised area 24.
- the downward-facing recess 25 or the raised area 24 are designed as blind hole recesses, i.e. closed at the axial end. Instead, the axial end could also be open.
- the recess 25 could be designed as a through hole instead of a blind hole recess.
- the recess 25 and the raised area 24 can interact with corresponding features 26 and 27 of the machine connection device 40.
- the recess 25 and the raised area 24 can function as a coding device, for example in such a way that the tool device 30 can only be used in a certain orientation to the machine tool 50 or that the compatibility of the tool device 30 with machine tools from different manufacturers or with certain types of machine tools from a certain manufacturer is ensured.
- One or more of these or other types of coding devices can be provided on the cover section 6.
- Fig. 31 shows - similar to Figures 28 and 29 - the machine connection device 40 in cross section and the tool connection device 1 in a side view. Accordingly, the profile wall 2a of the tool connection device 1 is shown with several contact surfaces 3 and intermediate, alternating, outward-facing projections 4 and inwardly recessed recesses 5.
- the profile wall 2a has a plurality of recesses 9, 9a or 9b. As shown in the middle and in the left part, wider recesses 9a and narrower recesses 9b can alternate (in the circumferential direction). For example, wider recesses 9a can be arranged on some or all of the projections 4 of the side wall 2a and narrower recesses 9b on some or all of the depressions 5 of the side wall 2a, as is also shown in Fig. 2.
- the recesses 9a and 9b can have similar shapes and the same length and position in the axial direction, as shown in the left half of Fig. 31.
- Fig. 32 shows a cross-sectional detail view of a tool device 30 in a plane parallel to the rotation axis 10 according to an embodiment of the present invention.
- the section shown shows the profile wall 2a, a part of the cover section 6, and the Transition section 7 and the working area 21.
- Fig. 32 shows rounded portions 8 at the transitions from the profile wall 2a to the cover section 6 or to the transition section 7.
- the cover section 6 is arranged in the region of an upper end plane 19, the transition section 7 in the region of a lower end plane 18.
- the profile wall extends between the rounded portions 8 and thus has an axial extension Ep.
- the tool connection device as a whole or the distance between the lower and upper end planes 18, 19 has an axial extension Ew.
- the profile wall 2a of the tool connection device 1 can extend over an axial area Ep that corresponds to less than 100% of the extension Ew of the tool connection device 1, for example at most 90% or at most 80% or at most 70% or at most 60% or at most 50% of the axial extension Ew of the tool connection device 1. If the rounded portions 8 have the same axial extension, the profile wall 2a can be arranged centrally in relation to the axial extension Ew of the tool connection device 1, otherwise it cannot be arranged centrally in relation to the latter.
- the central opening 20 of the tool device 30 forms part of a radial, for example U-shaped, opening in the cover section 6, which extends along a radial to the edge of the cover section 6.
- the radial along which the radial opening in the cover section 6 extends can in particular enclose an angle other than 0° with the longitudinal axis of the tool device 30, for example an angle in the range between approximately 120° and 150°.
- the radial or U-shaped opening in the cover section 6 is followed by an opening or interruption in the profile wall 2a, so that the tool device 30 is open on one side.
- the U-shaped opening in the cover section 6 and the adjoining opening or interruption in the profile wall 2a can have a substantially constant or variable width.
- the U-shaped opening in the cover section 6 and the adjoining opening or interruption in the profile wall 2a is defined by two (at least in sections) substantially parallel edges in the cover section 6 or in the profile wall 2a.
- FIG. 33 shows various stages in the manufacturing method of the tool connection device 1, while Fig. 37 shows the process sequence in general.
- a workpiece 60 is provided in a step 81 from which the tool connection device 1 is to be manufactured.
- the workpiece 60 can initially be present, for example, as a flat, round disk 60, for example made of hardened sheet steel.
- the disk 60 thus has a flat region 61, which, however, in this exemplary embodiment extends over the entire disk 60.
- the material thickness of the disk 60 can, for example, be in a range between 0.75 and 3 mm, preferably between 1 and 1.5 mm.
- the workpiece 60 can initially be present without any contours, recesses, etc.
- the disk 60 is provided with a plurality of recesses, in particular with a central opening 20, as well as a plurality of recesses 62, 63, 64 arranged around this central opening 20.
- the recesses 62 to 64 - depending on the embodiment - can have different shapes and sizes and can be arranged at different radii from the center of the disk 60.
- Fig. 33 shows three different types of such recesses 62 to 64, which are located on different radii.
- the middle radius is indicated as a circle with a dashed line.
- the disk 60 has recesses 63 distributed regularly around the circumference on this middle radius, each of which is offset by 15°. For reasons of clarity, however, only three of these recesses 63 are shown.
- the recesses 63 are located in an (annular) area from which the profile wall 2a of the tool device is later created.
- the recesses 64 on the outer radius can also be evenly distributed in the circumferential direction, for example offset by 30° each, as shown in Fig. 33.
- These recesses 64 can be designed as welding points or as through holes for screws, rivets, etc. for later connection to the plate 28 (Fig. 35), as described above.
- the recesses 62 on the inner radius can serve as coding devices as previously described or ensure compatibility with different types of machine tools.
- only two recesses 62 offset by 30° are shown.
- Corresponding further recesses 62 can be provided so that the disk 60 can have, for example, twelve recesses 62 in this area.
- a further method step 83 the initially flat disk 60 is deformed, for example by a deep-drawing process or the like, in order to convert the disk 60 into the three-dimensional tool connection device 1, which is shown in Fig. 34.
- an inner region of the disk 60 - in this example a region which is indicated in Fig. 34 by the inner of the two star-shaped polygons and whose outer edge runs between the recesses 62 and 63 - is offset relative to the outer ring in which the recesses 64 are located and which is indicated in Fig. 34 outside the larger of the two star-shaped polygons, so that this inner region is located on a different radial plane than the outer ring.
- the inner area forms the cover section 6 of the tool connection device 1.
- the outer ring represents the transition section or flange 7.
- the middle area between the two star-shaped polygons shown in Fig. 34 forms the profile wall 2a, which extends between the flange 7 and the cover section 6 and whose contact surfaces 3 are inclined both with respect to a (radial) plane in which, for example, the flange 7 runs, and with respect to the axis of rotation 10 - which runs perpendicular to the plane of the drawing. Because the three-dimensional structure of the tool connection device 1 is not immediately apparent in the two-dimensional representation of Fig. 34, reference is also made (again) to Fig. 2.
- the deformation taking place in step 83 also deforms the recesses 63 of Fig. 33.
- the deformation (for example by deep drawing) makes the recesses 63 longer (“higher”) - in the two-dimensional representation of Fig. 34, this is illustrated by the fact that the radial extent of the recesses 63 (in Fig. 34 marked as recesses 9a and 9b) has increased.
- the deformation makes those recesses 63 (in the circumferential direction) wider which are ultimately located at the locations of the outward-facing projections 4 of the profile wall 2a - in Fig. 34 these are the recesses 9a.
- the deformation makes those recesses 63 (in the circumferential direction) narrower which are ultimately located at the locations of the recessed recesses 5 of the profile wall 2a - in Fig. 34 these are the recesses 9b.
- step 83 the method may end (step 84).
- the recesses 63 can also be dimensioned differently, in particular so that in step 82 those recesses 63 that are intended for positions on projections 4 and which later become the recesses 9a are formed narrower in the circumferential direction than those recesses 63 that are intended for positions on depressions 5 and which later become the recesses 9b. With appropriate dimensioning, the recesses 9a and 9b can then have essentially the same length in the circumferential direction after deep drawing. List of reference symbols
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Milling Processes (AREA)
Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202022106179.3U DE202022106179U1 (de) | 2022-11-03 | 2022-11-03 | Werkzeugeinrichtung und Werkzeugmaschinen- und Werkzeugeinrichtungskombination |
| PCT/EP2023/080506 WO2024094773A1 (de) | 2022-11-03 | 2023-11-02 | Werkzeugeinrichtung, werkzeugmaschinen- und werkzeugeinrichtungskombination und herstellungsverfahren |
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| Publication Number | Publication Date |
|---|---|
| EP4611962A1 true EP4611962A1 (de) | 2025-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP23801337.9A Pending EP4611962A1 (de) | 2022-11-03 | 2023-11-02 | Werkzeugeinrichtung, werkzeugmaschinen- und werkzeugeinrichtungskombination und herstellungsverfahren |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4611962A1 (de) |
| CN (1) | CN120265430A (de) |
| DE (1) | DE202022106179U1 (de) |
| WO (1) | WO2024094773A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202022106179U1 (de) | 2022-11-03 | 2024-02-06 | C. & E. Fein Gmbh | Werkzeugeinrichtung und Werkzeugmaschinen- und Werkzeugeinrichtungskombination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO2884309T3 (de) | 2013-08-01 | 2018-09-08 | ||
| DE202013006920U1 (de) | 2013-08-01 | 2014-11-03 | C. & E. Fein Gmbh | Werkzeugeinrichtung |
| DE202013006900U1 (de) | 2013-08-01 | 2014-11-03 | C. & E. Fein Gmbh | Werkzeugmaschine |
| DE102013111383B4 (de) * | 2013-10-15 | 2025-03-13 | C. & E. Fein Gmbh | Adapter zur Befestigung eines Werkzeugs an einer Werkzeugaufnahme |
| DE102014103048B4 (de) * | 2014-03-07 | 2016-11-17 | C. & E. Fein Gmbh | Elektrowerkzeug aufweisend ein Bauteil zur Herstellung einer formschlüssigen Nietverbindung eines Werkzeugs |
| DE202022106179U1 (de) | 2022-11-03 | 2024-02-06 | C. & E. Fein Gmbh | Werkzeugeinrichtung und Werkzeugmaschinen- und Werkzeugeinrichtungskombination |
-
2022
- 2022-11-03 DE DE202022106179.3U patent/DE202022106179U1/de active Active
-
2023
- 2023-11-02 EP EP23801337.9A patent/EP4611962A1/de active Pending
- 2023-11-02 WO PCT/EP2023/080506 patent/WO2024094773A1/de not_active Ceased
- 2023-11-02 CN CN202380076977.9A patent/CN120265430A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024094773A1 (de) | 2024-05-10 |
| CN120265430A (zh) | 2025-07-04 |
| DE202022106179U1 (de) | 2024-02-06 |
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