Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
  • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
  • B24D13/06—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery the flaps or strips being individually attached
• • 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
  • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
  • B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
• • 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
  • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
  • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
  • B24B29/06—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
• • 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
  • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
  • B24B9/002—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor for travelling workpieces
• • 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
  • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
  • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
  • B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
  • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
  • B24D13/04—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising a plurality of flaps or strips arranged around the axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
  • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
  • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips

Definitions

• the invention relates to a tool for machining an object comprising a plurality of layers of fingers, the fingers being spaced apart within the layers.
• burrs can occur. These mostly sharp edges can result in injury during component handling and / or impairment of subsequent process steps (e.g., edgeless powder coating, mating inaccuracies, etc.).
• burrs on the component are removed. Burr removal often requires a two-step approach. In the first step, the primary ridge and then the secondary ridge are removed. The second step is often necessary because the primary ridge is not completely removed, but is reshaped. Often, in addition to the deburring, a so-called edge rounding is required in order to achieve further quality requirements. to meet the requirements.
• deburring and rounding machines In the field of deburring and edge rounding of 2D and partially also 3D workpieces, deburring and rounding machines have prevailed. In such machines usually a sanding belt or disk unit is used with abrasive belts or grinding wheels for Primärgratentfernung and then removed the secondary ridge or edge rounding by means of deburring and rounding tools.
• Edge rounding is to be regarded as critical with increasing radius.
• the quadratic relationship between radius and chip volume places considerable demands on the tools used.
• a doubling of the edge radius leads to a quadrupling of the chip volume.
• the machine In order to achieve larger edge rounding for a given tool and workpiece, the machine must be operated in such a way that the rounding tools have as long an exposure time as possible (low feed rate) and are delivered correspondingly deep to the workpiece edges. As a consequence, the long exposure time and deep feed result in extended process times, increased tool wear and unwanted heat input into the workpiece.
• the low feed rate for edge rounding is not proportionate to the primary burr distance. While the primary burr removal can be carried out at feed speeds of between 1 and 10 m / min, feed speeds of between 0.2 and 0.5 m / min are used for powerful edge rounding.
• the prior art mainly uses tools with abrasive materials consisting of a combination with abrasive cloth and abrasive nonwoven.
• the main abrasive material used is coated abrasives.
• these are sometimes used in web-slotted design and with soft intermediate or support layers (eg abrasive nonwovens, Tampico - Fiber).
• the tools may be formed in rolls, plate or block shape.
• Object of the present invention is to provide a tool for editing, preferably for deburring and / or edge rounding, an object that allows higher feed rates with the same edge rounding or a stronger edge rounding at the same feed rate. It is also an object to provide a method for deburring and rounding edges of a workpiece within a process step. The object is achieved by the tool for processing an object according to claim 1, the method for removing secondary burrs according to claim 31 and the method for deburring and rounding according to claim 32.
• the dependent claims indicate advantageous developments of the invention.
• a tool for processing an object has a plurality of finger layers, each extending in a ply surface.
• Each of the finger layers has a plurality of fingers.
• Each layer surface advantageously has at least three, more preferably at least five fingers.
• the layer surface can be considered to be the surface which is stretched by the fingers of the finger layer, advantageously in an undeflected state of the fingers.
• the convex envelope of the fingers in the layer surface can advantageously be regarded as a stretched surface.
• the finger layers are arranged one behind the other such that the layer surfaces of adjacent finger layers at least partially overlap. This may or may not mean that even the fingers overlap.
• a projection of a finger position in a direction perpendicular to the finger position on the adjacent finger position overlaps or intersects with the adjacent finger position. So there is an area of the adjacent finger position that is covered by the projection.
• the overlap of adjacent layers may or may not be complete.
• a complete overlap may be present, while in the case of the dish-shaped and cylindrical geometries of the tool described below, there is normally only a partial overlap.
• the layer surfaces are flat.
• the finger layers do not overlap each other even in the undeflected state of the fingers.
• Each of the finger layers has a plurality of fingers according to the invention. These are designed so that they are in a direction that is on the layer surface of the corresponding finger position, which is not parallel to the sheet surface or in the layer surface, are bendable out of an undeflected state out.
• the direction in which the fingers are bendable are perpendicular to the layer surface of the corresponding finger position.
• the direction in which a finger is bendable in each position of the finger can be perpendicular to a longitudinal direction of the finger and / or perpendicular to a surface of the finger.
• the surface of the finger is preferably its largest surface, ie the surface in which it extends flatly.
• the undeflected state of a finger is that state in which the finger lies completely in the plane surface of the finger layer whose finger it is.
• the finger may be considered a bendable tongue.
• the fingers are each formed flat and extend in the undeflected state in the layer surface of that finger layer to which they belong.
• the fact that the fingers are flat means that they are flat, so that they have in the direction of the layer surface of that finger layer to which they belong, a larger, usually a much larger, expansion, as in the direction perpendicular to the layer surface.
• the fingers of the same finger position preferably extend parallel to each other in the undeflected state.
• the fingers are elongated, which means that they have a significantly greater extent in one direction in their layer surface, as in the direction perpendicular thereto in the layer surface and advantageously as in the direction perpendicular thereto perpendicular to the layer surface.
• the direction in which the fingers have the greater extent in the layer surface is referred to below as the longitudinal direction of the corresponding finger.
• the longitudinal directions of the fingers of the same finger position in the undeflected state are in each case parallel to one another.
• the edges of the fingers of the same finger position in the undeflected state parallel to each other. However, if the fingers have edges which are not straight in the undeflected state, then it is sufficient if the longitudinal directions are parallel.
• the extension of the fingers in the ply surface perpendicular to the longitudinal direction is referred to as the width of the fingers.
• the extension of the fingers in the direction perpendicular to the ply surface is referred to as the thickness.
• the length is greater than the width and the width is greater than the thickness of the fingers.
• immediately adjacent fingers of the same fingers lie in the undeflected state at a distance greater than zero.
• this distance is constant, so over the entire length of the fingers each have the same value.
• the distance can be measured, for example, from one edge of one finger to the nearest edge of the adjacent finger.
• the arrangement of the fingers within a fin gerlage can therefore be regarded as comb-shaped.
• the fingers are thus preferably produced from the position of the fingers, not by a straight cut, but by the fact that a partial surface of the layer from which the finger position is produced is removed between adjacent fingers.
• a working direction This is then the direction in which the tool is moved in the intended use.
• an intended movement for example, be a movement over a straight edge, which takes place so that the fingers overlap the straight edge with its largest surface, wherein preferably the straight edge when gluing is parallel to this largest surface of the fingers.
• the fingers are then preferably in a rieh tion from the layer surface bendable, to which the working direction is parallel or tangential.
• the layer planes then advantageously extend at a non-vanishing angle or perpendicular to the working direction.
• the fingers of the same finger position are independently elastically bendable from the undeflected state.
• the fact that the fingers are bendable independently of each other from the deflected state means that the application of a force to exactly one of the fingers that bends this finger does not cause other fingers of the same position to be bent.
• That the finger is elastically bendable from the undeflected state means that the finger returns substantially to the undeflected state when the force is removed. This results in a high adaptability to any workpiece contours with a high density of fingers.
• the geometries of the tool, fingers and finger pads described herein may mean idealization in the sense that many of the materials used for the finger pads are in practice plastically deformable to some extent.
• the tool or the fingers due to the production or by the use of the tool to a certain extent, have or assume different forms of the geometries described here.
• One skilled in the art will undoubtedly be able to assign such deviating shapes to the geometries described herein, so that these alternate forms should be construed as encompassed by the protection.
• the arrangement according to the invention makes it possible to use the tool without support material between the finger layers to realize. Preferably, therefore, no material is present between the fingers of adjacent finger layers. Preferably no material is present in that region between fingers of adjacent finger layers in which the fingers are bendable.
• the finger layers may be advantageously held by a support structure disposed at one end of the fingers.
• the finger layers can for example be glued into this support structure.
• the fingers of at least some of the finger layers may be arranged so that their projection falls on a respective adjacent of the finger layers in the distances between the fingers of the adjacent finger position and / or adjacent to the fingers of the adjacent finger position.
• the projection can advantageously take place in a direction at a non-vanishing angle or perpendicular to the layer surface of one of the corresponding finger layers, or in the direction in which the fingers are bendable out of their undeflected state.
• a projection in working direction may also be possible.
• the projection and the finger position, which is projected onto do not differ, so that the projection advantageously falls completely between the fingers of the respective adjacent layer.
• Such an arrangement can be used to increase the flexibility of the tool, since the bending of the fingers is not hindered by the adjacent finger position.
• the fingers of all adjacent finger layers can be arranged offset from one another in this way.
• the distance between adjacent fingers of the same position is greater than a width of these fingers, ie the extension of the fingers in the direction in which they are adjacent. If such finger layers are arranged as described above so that the fingers of adjacent finger layers are offset from one another in each case, it is achieved in this way that the fingers engage in bending with a distance to the fingers of the adjacent finger position between these fingers without rubbing against them ,
• the fingers can be At least some of the finger layers overlap with the fingers of the adjacent finger layers. This overlap can thus consist in particular in the projection of the fingers of the respective finger position in the direction perpendicular to the finger position on the adjacent finger position. The overlap may be complete or partial for one or both fingers. In this way, the strength of the
• the fingers of two, three, four or more immediately adjacent finger plies may overlap in a projection in a direction perpendicular to one of these finger plies on a common plane.
• the strength of the tool is adjustable over the distance between adjacent finger layers.
• Adjacent finger layers can advantageously adjoin one another directly or be spaced apart from one another by a distance of one, two, three or more thicknesses of finger layers.
• the distance between two finger layers is the distance of the layer surfaces of these finger layers from each other, measured perpendicular to the layer surface.
• the distance is measured here at that point of the finger layers to which the fingers are attached. This is particularly relevant in the case of the roller-shaped arrangement of the layers to be described below, where the adjacent finger layers can enclose a non-vanishing angle to each other. In a plate-shaped arrangement of the described
• the finger layers are preferably flat in the undeflected state, so that the layer surfaces of the finger layers are flat.
• the finger layers opposite to a direction in which the tool is moved past the object to be processed be inclined.
• the finger layers can preferably enclose an angle of greater than 0 ° and less than 180 ° with a line along which the finger layers are arranged one behind the other.
• the layers may include an angle greater than -45 ° and less than + 45 ° with said line.
• the fingers each have at least one abrasive and / or abrasive surface.
• This abrasive and / or abrasive surface is preferably a surface parallel to that surface of the corresponding finger in which the respective finger extends in a planar manner.
• the fingers may be formed as an abrasive on backing.
• the abrasive may be applied to a support and form with this the abrasive and / or abrasive surface.
• the pad may advantageously comprise or consist of cotton, polyester or polycotton.
• the finger layers can also have or consist of a grinding and / or abrasive material itself. In this case, no abrasive or abrasive material must be applied to the fingers.
• the abrasive and / or abrasive material of the fingers may advantageously have grain sizes greater than or equal to grain 12, preferably greater than or equal to grain 50, preferably greater than or equal to grain 100 and / or less than or equal grain 320, preferably less than or equal to grain 240, preferably smaller or equal to 150 grain.
• adjacent to the Finger layers may be designed so that these finger layers superimposed completely fill a rectangular area.
• This embodiment can be produced particularly efficiently by cutting out the two adjacent finger layers from a rectangular position by means of a cutting line.
• a length of the fingers may be greater than or equal to 20 mm, preferably greater than or equal to 30 mm, particularly preferably greater than or equal to 40 mm, and / or less than or equal to 150 mm, preferably less than or equal to 120 mm, preferably less than or equal to 90 mm. preferably less than or equal to 70 mm, preferably less than or equal to 60 mm, particularly preferably less than or equal to 50 mm.
• all fingers of the tool have the same length.
• the individual fingers may in turn be slotted. In this case, slots can be made in the fingers, which pierce the fingers and extend parallel to the longitudinal direction of the fingers.
• a plurality of slots along a straight line one behind the other, whereby the straight line can run parallel to the longitudinal axes of the fingers. It can be advantageously provided in the fingers each have a plurality of parallel slots or a plurality of parallel rows of slots.
• the width of the fingers, d. H. an extension of the fingers in the direction in which the fingers of the same layer are arranged side by side may preferably be greater than or equal to 2 mm, preferably greater than or equal to 5 mm, particularly preferably greater than or equal to 7 mm and / or less than or equal to 20 mm , preferably less than or equal to 15 mm, more preferably less than or equal to 10 mm.
• a thickness of the finger layers or the fingers without any abrasive applied may preferably be greater than or equal to 0.5 mm, preferably greater than or equal to 1 mm and / or less than or equal to 2 mm, preferably less than or equal to 1 mm.
• all finger layers be arranged parallel to each other in succession, so that a plane spanned by the finger layers surface is perpendicular to the longitudinal directions of the fingers rectangular.
• the entire tool in this case preferably has a block shape.
• the tool advantageously in the direction in which the fingers of the same layers are arranged side by side, an extension of greater than or equal to 50 mm, preferably greater than or equal to 70 mm and / or less than or equal to 100 mm, preferably smaller or equal to 80 mm.
• This extension is here called width of the
• a depth or length of the tool ie an extension of the tool in the direction in which the finger layers are arranged one behind the other, may preferably be greater than or equal to 50 mm, preferably greater than or equal to 60 mm and / or less than or equal to 80 mm, preferably smaller or be equal to 70 mm.
• the finger layers along a closed circular line can be arranged one behind the other, wherein the layer surfaces are perpendicular to the circular line and wherein the fingers perpendicular to the surface of a through the circular line described circle, ie the plane in which the circle runs.
• the finger layers can be arranged on an annular carrier, wherein the individual fingers are perpendicular to a circular ring surface of the carrier.
• a multiplicity of further finger layers are provided, which are arranged along a further closed circular line.
• the further closed circular line can extend concentrically to the circular line of the aforementioned first finger arrangement and have a larger or smaller radius than the first circle line mentioned.
• the further finger layers can therefore run inside or outside the first-described finger positions.
• the fingers of the further finger layers have the same length as the fingers of the first finger layers and are arranged so that the ends of the other fingers are in the same planes as the ends of the fingers of the first finger layers.
• the further finger layers could also be arranged with a larger number around the first finger layers, so that a drop in the density of fingers to the outside can be avoided.
• the tool in a plate-shaped arrangement a
• Diameter in the plane of the circular line greater than or equal to 50 mm, preferably greater than or equal to 80 mm, preferably greater than or equal to 100 mm, preferably greater or equal to 115 mm, preferably greater or equal to 125 mm, preferably greater than or equal to 150 mm and / or less than or equal to 1500 mm, preferably less than or equal to 1000 mm, preferably less than or equal to 400 mm, preferably less than or equal to 250 mm, preferably less than or equal to 200 mm .
• the finger layers can, in a plate-like arrangement in a direction in which the fingers of the same layers are arranged side by side, a width of greater than or equal to 15 mm, preferably greater than or equal to 20 mm, preferably greater than or equal to 30 mm and / or less than or equal to 100 mm, preferably less than or equal to 65 mm, preferably less than or equal to 60 mm, preferably less than or equal to 50 mm, preferably less than or equal to 40 mm.
• a multiplicity of the finger layers can be combined to form one block each.
• each block in the direction in which the finger layers are arranged one behind the other has a depth of greater than or equal to 20 mm, preferably greater than or equal to 35 mm, preferably greater than or equal to 45 mm and / or less than or equal to 70 mm, preferably less than or equal to 55 mm.
• the finger layers along a closed circular line can be arranged one behind the other, again the ply surfaces are perpendicular to the circular line and the fingers extend in their longitudinal direction radially to an axis which extends through the center of the circular line and perpendicular on the circle enclosed by the circular line.
• This embodiment of the tool will be referred to below as a roller-shaped configuration.
• the tips of the fingers can lie here on a common cylindrical surface.
• the points of the fingers to which they are attached lie on a common cylindrical surface.
• the finger layers are normally at an angle to each other about said axis.
• the fingers can here preferably be arranged on a cylindrical carrier structure.
• a diameter of the tool in the roller-shaped configuration, measured between points of the fingers opposite the axis in the direction radially to the circular line or axis can advantageously be greater than or equal to 50 mm, preferably greater than or equal to 100 mm, particularly preferably greater than or equal to 200 mm and / or less than or equal to 400 mm, preferably less than or equal to 300 mm.
• a width of the tool ie its extension in the direction perpendicular to the circular area enclosed by the closed circular line or in the direction of the axis may preferably be greater than or equal to 20 mm, preferably greater than or equal to 100 mm, preferably greater than or equal to 500 mm, preferably greater than or equal to Be 1,500 mm and / or less than or equal to 2,500 mm, preferably less than or equal to 2,000 mm, more preferably less than or equal to 1,700 mm.
• a flexibility of the tool can be adjusted or varied in different ways.
• flexibility can be influenced by the selection of the profiling of the finger layers or the fingers.
• a given stiffness of the fingers in the foot of the fingers so in the area adjacent to the attachment of the fingers, distances, for example, by spacers to bring. In this way, the bendable length of the fingers can be changed and thereby the rigidity of the fingers.
• optionally laminated main finger positions can be used to influence the rigidity of the elements.
• the outermost fingers of each finger layer can be bevelled sloping down to the edge of the finger position.
• the fingers can become shorter toward the edge.
• the fingers can advantageously be narrower towards the edge. By this configuration, a softer engagement is achieved.
• the tool according to the invention is a tool for
• the invention also provides a method for removing secondary burrs at one or more edges of a metallic workpiece and / or for rounding one or more edges of a metallic workpiece.
• a tool is moved over the edge to be processed as described above, so that the finger layers strike the edge.
• the tool is moved in a direction that is perpendicular to the edge to be machined.
• the tool is preferably moved in a direction that is not parallel to the finger positions in the undeflected state.
• the direction can be perpendicular to the finger layers in the undeflected state.
• a method for deburring and rounding off one or more edges of a metallic workpiece is also specified, whereby a tool as described above is thus passed over the channel. te is moved so that the finger layers the edge strip, so that the strip of edge by the finger layers a primary ridge is removed at the edge and the edge is rounded.
• the tool is advantageously moved in a direction perpendicular to the edge to be machined direction.
• the tool can also be moved in a direction perpendicular to the bearing surfaces in the undeflected state here.
• the design of the tool according to the invention makes it possible to remove both a primary burr and to round off the edge. The Primärgratentfernung and the rounding can be effected in a common step.
• the removal rate of the tool is substantially increased compared to tools of the same size according to the prior art.
• stronger edge rounding can be achieved within a shorter time and the production efficiency can be improved.
• the higher performance leads to the possibility of integrating process steps that are carried out independently of each other in the prior art. For example, the process steps of primary burr removal, secondary burr removal and edge rounding can be combined into one process by the high removal rate of the invention. As a result, completely new machine configurations are conceivable.
• FIG. 2 shows a plate-shaped embodiment of a tool according to the invention
• FIG. 3 shows a block-shaped embodiment of a tool according to the invention
• FIG. 4 shows a plate-shaped embodiment of a tool according to the invention in a plan view
• FIG. 5 shows a plate-shaped configuration of a tool according to the invention with two rows in a plan view
• FIG. 6 shows a schematic representation of an arrangement of fingers in a tool according to the invention
• FIG. 7 shows a schematic representation of an arrangement of fingers in a tool according to the invention
• FIG. 8 shows a schematic representation of an arrangement of fingers in a tool according to the invention
• FIG. 9 shows a process sequence of deburring and edge rounding according to the prior art
• FIG. 10 shows an optional oblique position of the layers with respect to FIG.
• FIG. 11 shows an optional embodiment of the invention with edges bevelled fingers
• Figure 12 shows an optional embodiment of two layers of the invention with fingers having serrated edges
• FIG. 13 shows an optional embodiment of a finger position with slotted fingers.
• Figure 1 shows a roller-shaped configuration of a tool according to the invention in a complete view and an enlarged detail.
• the tool has a multiplicity of finger layers 1a, 1b, 1c, which are each because they extend in a layer surface.
• finger positions 1a, 1b and 1c are to be expressly named below, while the figure itself shows a multiplicity of further finger positions for which what has been said with respect to the finger positions 1a, 1b and 1c applies accordingly.
• the finger layers 1a, 1b and 1c are arranged one behind the other such that they overlap with the layer surfaces of adjacent finger layers 1a, 1b, 1c.
• adjacent finger layers 1a, 1b, 1c are at a non-vanishing angle to each other, whereby the overlap is not a complete overlap.
• Each of the finger layers 1a, 1b, 1c has a plurality of fingers 2a, 2b and 2c.
• the fingers 2a, 2b and 2c should be expressly named, while the tool has a large number of further fingers, for which the statements made with respect to the fingers 2a, 2b and 2c apply mutatis mutandis.
• the fingers 2aq, 2b, 2c are all the same length.
• the fingers 2a, 2b and 2c are bendable from an undeflected state in a direction perpendicular to the ply surface of the corresponding finger ply 1a, 1b, 1c. In FIG. 1, the fingers 2a, 2b, 2c are in the undeflected state.
• the fingers 2a, 2b, 2c are each formed flat and extend in the undeflected state shown in the layer surface of the corresponding finger position la, lb, lc. Fingers 2a, 2b, 2c of the same finger layer 1a, 1b, 1c extend in the undeflected state, in each case parallel to one another. The longitudinal directions of the fingers 2a, 2b, 2c of the same finger position la, lb, lc are therefore parallel to one another. In each case adjacent fingers 2a, 2b, 2c of the same finger position la, lb, lc are spaced from each other in the undeflected state by a distance greater than zero.
• the finger layers 1a, 1b, 1c are arranged behind one another along a closed circular line.
• the layer surfaces of the finger layers la, lb, lc are each perpendicular to the circular line.
• the fingers 2a, 2b, 2c extend with their longitudinal direction radially to an axis which is defined by a Mit- Point of the circle line runs and perpendicular to the circle described by the circle.
• All finger layers 1a, 1b, 1c are arranged on a common carrier structure 3.
• the fingers 2a, 2b, 2c of all finger layers 1a, 1b, 1c are with one
• the support structure 3 has a cylindrical shape about that axis as a cylinder axis, with respect to which the fingers with 2a, 2b, 2c extend radially with their longitudinal direction.
• Figure 2 shows a plate-shaped configuration of a tool according to the invention.
• a multiplicity of finger layers 1a, 1b, 1c which each extend in a layer surface, are arranged along a circular line one behind the other such that the layer surfaces of adjacent finger layers 1a, 1b, 1c overlap. Due to the dish-shaped arrangement, the overlap is not complete.
• the finger positions 1a, 1b, 1c are referred to, with the same thing being said for the other finger positions.
• Each of the finger layers 1a, 1b, 1c has a plurality of fingers 2a, 2b, 2c.
• the fingers 2a, 2b, 2c are bendable from an undeflected state in a direction perpendicular to the layer surface of the corresponding finger layers 1a, 1b, 1c.
• the fingers are shown in the undeflected state.
• the fingers 2a, 2b, 2c are each formed flat and extend in the undeflected state in the layer surface of the corresponding finger position la, lb, lc.
• the fingers 2a, 2b, 2c of the same finger position 1a, 1b, 1c in the undeflected state each extend parallel to one another and all have the same length.
• adjacent fingers 2a, 2b, 2c of the same finger position 1a, 1b, 1c in the undeflected state have a distance greater than zero from one another.
• the finger layers 1a, 1b, 1c are arranged one behind the other along a closed circular line, wherein the layer surfaces of the finger layers 1a, 1b, 1c are perpendicular to the circular line and wherein the fingers 2a, 2b, 2c are perpendicular to the surface of a circle described by the circular line.
• the finger layers la, lb, lc are arranged on a support structure 3, which in the plate-like configuration of
• Figure 2 may have a planar annular shape.
• the surface of the circular ring shape lies in the plane described by the closed circular line.
• the fingers 2a, 2b, 2c are arranged with one end on the support structure 3 and stand with their longitudinal directions perpendicular to the surface of the support structure 3.
• the plate-like configuration can be moved over an edge of a workpiece that the tool to a through the center of the closed circular line going axis is rotated, which is parallel to the longitudinal directions of the fingers 2a, 2b, 2c.
• Figure 3 shows a block-shaped embodiment of an inventive
• the tool has a multiplicity of finger layers 1a, 1b, 1c, of which only three layers 1a, 1b, 1c are to be named for the sake of clarity, while the same applies mutatis mutandis to the other layers shown.
• the finger layers 1a, 1b, 1c are arranged one behind the other such that the layer surfaces of adjacent finger layers 1a, 1b, 1c overlap. In the block-shaped embodiment, this overlap may be complete. In addition, in the block-shaped embodiment, the layer surfaces of all finger layers la, lb, lc completely overlap.
• each of the finger layers 1a, 1b, 1c has a plurality of fingers 2a,
• the overall tool has a substantially cubic shape.
• the fingers 2a, 2b, 2c of the finger layers la, lb, lc respectively formed flat and extend in the undeflected state in the corresponding layer surface, which is flat here.
• the fingers 2a, 2b, 2c are bendable from an undeflected state.
• the figure also shows here the fingers 2a, 2b, 2c in undeflected condition.
• the fingers 2a, 2b, 2c of the same finger layer 1a, 1b, 1c extend in the undeflected state, in each case parallel to one another. Adjacent fingers 2a, 2b, 2c of the same finger position la, lb, lc have a distance greater than zero in the undeflected state.
• the finger layers 1a, 1b, 1c are arranged on a common carrier structure 3, which may have a rectangular shape in the block-shaped embodiment of FIG.
• FIG. 4 shows a further example of a plate-shaped embodiment of the tool according to the invention corresponding to FIG. 2.
• the tool is shown in a plan view in the direction perpendicular to the plane in which the circular line runs.
• the finger layers 1a, 1b, 1c extend radially with respect to the center of the circumference.
• the finger layers 1a, 1b, 1c are here shown as continuous lines, but they have the fingers 2a, 2b, 2c described in FIG. 2, which are not dissolved here. It can be seen that a density of the finger layers 1a, 1b, 1c and thus a density of the fingers 2a, 2b, 2c decreases from the inside to the outside.
• a plate-shaped workpiece as shown in Figure 5 can be configured.
• a multiplicity of further finger layers 1 b, 1 e, 1 f are provided, which are arranged along a further closed circular line with a smaller radius.
• a multiplicity of further finger positions are arranged along the inner circle, for which the statements made with respect to the finger positions ld, le, lf apply mutatis mutandis.
• the further closed circular line, along which the finger layers ld, le, lf are arranged, is arranged concentrically with the first circle and has a smaller radius than the latter.
• the two circular lines run in the same plane.
• the inner arrangement of finger layers ld, le, lf has a smaller number of finger layers ld, le, lf, whereby the finger density in the loading rich of the inner finger layers ld, le, lf is reduced compared to a configuration in which the outer finger layers la, lb, lc would be continued in the area in which in Figure 5, the inner finger layers ld, le, lf are arranged.
• the tool shown in Figure 5 thereby allows a more homogeneous machining on a larger surface than the tool shown in Figure 4 with the same external dimensions.
• Figures 6, 7 and 8 show, by way of example, various possible arrangements of fingers and finger positions in the tool according to the invention.
• the fingers are shown here schematically as straight lines.
• the straight lines can be regarded as a foot or fastening line of the corresponding finger on a support structure 3 or as tops of the fingers on the support structure 3 opposite end of the fingers.
• the finger layers are shown in Figures 6, 7 and 8 parallel to each other, which is true in the block-shaped and the cylindrical configuration. In a dish-shaped embodiment of the tool, the finger layers in the representation of FIGS. 6, 7 and 8 would have an angle to one another. However, since this is very small, it would be difficult to see in the figures, so that the figures 6, 7 and 8 can also be considered as true for the plate-like configuration.
• Figure 6 shows an arrangement of fingers. Only the fingers 2a to 2f are expressly named here. For the other fingers shown what is said applies accordingly.
• the fingers of adjacent finger layers 1a to le are arranged offset to one another.
• the fingers 2a, 2b, 2c of the finger layer 1a are arranged in a projection onto the adjacent finger layer 1b in the spaces between the fingers 2d, 2e, 2f of this adjacent finger layer. In this case, it is projected in the direction perpendicular to the ply surface of the finger ply la or lb.
• the fingers of all adjacent finger layers la to le in the projection mentioned are arranged at the distances between the fingers or next to the fingers of the adjacent finger layer 1a to le.
• FIG. 7 shows a possible arrangement of fingers 2a to 21 in finger layers 1a until Ii.
• the fingers 2a, 2b, 2c of the finger layer 1a overlap in a projection onto the adjacent finger layer 1b in the direction perpendicular to the surface thereof with the fingers 2g, 2h and 2i of this finger layer 1b. Accordingly, the fingers of the finger layer lc also overlap with the fingers of the finger layer 1a and 1b.
• the fingers 2a to 2i of the finger layers 1a to 1c are thus arranged one behind the other in the direction perpendicular to the layer surface of these finger layers.
• the fingers 2j to 21 of the finger layers ld to lf which adjoin the layers la to lc, are arranged in a projection in the direction perpendicular to the layer surface of the finger layers la to lc or ld to lf in the spaces between the adjacent layer lc.
• the fingers 2j to 21 of the layers ld to lf are arranged in succession or overlapping, as described above for the layers 1a to 1c.
• the fingers of the layers lg to li are in turn arranged behind the fingers 2a to 2i of the layers la to lc, ie overlapping with them as described above. They are therefore arranged in the distances between the fingers of the layers ld to lf or next to the fingers of these layers in the projection.
• FIG. 8 shows an arrangement of fingers 2a to 2f in finger layers 1a to 1d.
• the fingers 2a to 2f of adjacent finger layers 1a to 1d fall again, as shown in FIG. 6, in the projection into the distances between the respective adjacent finger positions 1a to 1d.
• all fingers have the same width and the same distances from each other. This is optional but advantageous. While in Figs. 6 and 7 the width of the fingers is equal to the distance between adjacent fingers of the same layer, in the example shown in Fig. 8, the fingers 2a to 2f have a smaller width than the distance between adjacent ones of the fingers 2a to 2f of the same Location la to ld. In this way, fingers 2d to 2f of a finger layer 1b fall at a distance 4 between the fingers 2a to 2c of the adjacent finger layer 1a and 1c, respectively. The fingers 2d to 2f can therefore be bent without rubbing or abutting with the fingers 2a to 2c of adjacent finger layers 1a to 1d.
• FIG. 9 shows by way of example a course of a method for deburring and edge rounding of a workpiece.
• a state ZI is a workpiece with a primary ridge.
• a primary burr can be created, for example, by punching out the workpiece from a sheet or by punching out parts from the workpiece.
• the prior art now provides a step Sl, in which the primary burr is removed.
• the primary edge removal can be effected, for example, by means of a circulating belt with an abrasive surface.
• the primary ridge is not completely removed, but at least partially transformed into a so-called secondary ridge.
• the step S1 can therefore lead to a state Z2 in that a workpiece with a secondary ridge exists.
• a step S2 of secondary burr removal which is in one state
• Z3 leads to a deburred workpiece.
• the edges of the deburred workpiece be rounded to some extent, for example, to prevent spalling of a later applied paint.
• the rounding of the edges is achieved by a step S3 of the edge rounding, which is deburred on the
• Figure 10 shows an optional skew of the layers from the direction in which the tool is moved in use.
• the upper partial image shows a plan view corresponding to FIG. 6.
• the lower left partial image shows a sectional view along the section line A-A shown in the upper partial image and the lower right partial image shows a sectional view along the line B-B in the upper partial image.
• the direction of movement of the tool in use is perpendicular to the direction along which the fingers of the same position are arranged side by side, in the upper part of the image so to the right or left.
• the layers la to le are inclined with respect to the direction of movement by an angle of not equal to 90 °.
• adjacent layers la to ld are inclined in opposite directions.
• the layers la, lb and lc are inclined to the right and the layers ld and le to the left.
• FIG. 11 shows an embodiment of the invention corresponding to the embodiment shown in FIG.
• the upper part of the picture shows the position of the Finger la to lh from above, the middle part of the picture a side view of the area of the fingers and the lower part of the picture a position of the fingers 1a to 1 h from above.
• the embodiment shown in FIG. 11 differs from the embodiment shown in FIG. 6 in that, in FIG. 11, the outermost fingers 2 a, 2 d, 2 g, 2 h of each finger ply are bevelled in a sloping manner towards the edge of the finger ply. To the edge, the fingers become shorter. The fingers can become narrower towards the edge. By this configuration, a softer engagement is achieved.
• FIG. 11 shows an embodiment of the invention corresponding to the embodiment shown in FIG.
• the upper part of the picture shows the position of the Finger la to lh from above, the middle part of the picture a side view of the area of the fingers and the lower part of the picture a position of the fingers 1
• FIG. 12 shows by way of example an embodiment of the finger layers 1a to 1d, in which the finger layers have serrated edges.
• the basic shape of the finger layer corresponds to that shown in FIG. 3, with the difference that the edges of the fingers 2a, 2b, 2c are jagged.
• Partial image A shows one of the finger layers 1A.
• Part figure 12B shows a starting position from which the finger layers 1a and 1b can be produced by cutting.
• a (here optionally jagged) cutting line is introduced into the layer, which runs alternately in serrated long sections and straight short sections.
• two finger layers la and lb are separated from the starting position, each having elongate fingers 2a, 2b and 2c.
• FIG. 12C shows a plan view of the two finger layers 1 a and 1 b produced in accordance with FIG. 12B, which are arranged one after the other according to FIG. 3. It can be seen that the positions overlap here in the area of their spikes in the projection.
• the fingers of the same finger position la or lb are each arranged with their longitudinal directions parallel to one another.
• FIG. 13 shows an example of an optional embodiment of a finger layer 1a, in which the fingers are each slotted.
• the fingers are each slotted.
• three rows of slots 5 arranged one behind the other in the direction of the longitudinal direction of the fingers are introduced into the fingers 2a, 2b, 2c.
• the slots extend in this case with their longitudinal direction parallel to the longitudinal direction of the fingers 2a, 2b, 2c.
• the finger layer 1a has five fingers, each having three rows of slots, each row of slots having four slots 5 arranged one behind the other.
• the tool according to the invention can now be used in a method for removing secondary burrs on an edge of a metallic workpiece, that is to say in step S2.
• step S3 it may alternatively or additionally also be used in step S3 for rounding an edge of a metallic workpiece.
• the tool is moved over the edge of the workpiece in such a way that the finger layers strip the edge to be processed, thereby removing the secondary ridge and / or rounding off the edge.
• the tool according to the invention can be used in a method in which, in a common step, primary burrs on the edges of the tool are removed and the edges are rounded.
• the workpiece can be processed in only one step from the state ZI in the state Z4. Again, the tool is moved over the edge so that the finger layers strip the edge thereby removing the primary burrs and rounding the edge.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

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• 2016
  • 2016-10-21 DE DE102016220766.0A patent/DE102016220766B4/de active Active
• 2017
  • 2017-10-20 JP JP2019542792A patent/JP7211955B2/ja active Active
  • 2017-10-20 US US16/343,321 patent/US20200180113A1/en active Pending
  • 2017-10-20 EP EP17790743.3A patent/EP3529005A1/de active Pending
  • 2017-10-20 WO PCT/EP2017/076896 patent/WO2018073432A1/de unknown

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