EP3294497B1 - Unité d'usinage destinée à une machine d'ébarbage d'une pièce plate - Google Patents

Unité d'usinage destinée à une machine d'ébarbage d'une pièce plate Download PDF

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Publication number
EP3294497B1
EP3294497B1 EP16725359.0A EP16725359A EP3294497B1 EP 3294497 B1 EP3294497 B1 EP 3294497B1 EP 16725359 A EP16725359 A EP 16725359A EP 3294497 B1 EP3294497 B1 EP 3294497B1
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EP
European Patent Office
Prior art keywords
processing unit
carrier plate
workpiece
abrasive
sheets
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.)
Active
Application number
EP16725359.0A
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German (de)
English (en)
Other versions
EP3294497A1 (fr
Inventor
Dirk KRÖPLIN
Thomas WEINFURTNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arku Maschinenbau GmbH
Original Assignee
Arku Maschinenbau GmbH
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Filing date
Publication date
Application filed by Arku Maschinenbau GmbH filed Critical Arku Maschinenbau GmbH
Priority to PL16725359T priority Critical patent/PL3294497T3/pl
Publication of EP3294497A1 publication Critical patent/EP3294497A1/fr
Application granted granted Critical
Publication of EP3294497B1 publication Critical patent/EP3294497B1/fr
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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
    • 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
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • 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
    • 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
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing

Definitions

  • the invention relates to a processing unit for a machine for deburring a flat workpiece.
  • the processing unit strokes a flat side of the workpiece to be deburred.
  • deburring machines with horizontally revolving belts, which have a plurality of processing units arranged next to one another, which are designed in the manner of brushes and which have a grinding trimming on their underside.
  • Packets of closely spaced abrasive papers, abrasive cloth or abrasive fleeces are particularly suitable as abrasive trimmings.
  • the workpiece to be deburred is advanced transversely to the direction of movement of the machining units. Paint the exposed lower edges of the sanding sheets at right angles to the feed direction of the workpiece over its surface and thereby remove the protruding burrs. Due to the flexibility of the sanding sheets, they can penetrate the cut-out recesses. However, due to the mechanical abrasion, the sanding sheets wear out relatively quickly.
  • EP 2 792 450 A1 discloses a machine for deburring sheet metal parts with endlessly revolving drive belts on which a plurality of brushes are arranged next to one another.
  • the abrasive trimmings of the brushes consist of a package of sandpaper, the upper edges of which are glued to the flat underside of a carrier plate.
  • a support fleece is arranged between each two adjacent sandpaper. Sandpaper and support fleeces stand vertically from the underside of the carrier plate to which they are glued.
  • DE 201 06 234 describes a grinding device for grinding a plate-shaped workpiece, preferably made of wood, with a circumferential grinding belt which comprises a plurality of grinding elements.
  • the grinding elements have a brush strip consisting of bristles, on one side of which an abrasive cloth is applied.
  • the grinding elements are inclined opposite to the transport direction of the workpiece, the side of the grinding element facing the workpiece being covered with the abrasive cloth.
  • U1 shows and describes a device for processing a strip-shaped or plate-shaped metallic workpiece.
  • Machining elements are attached to the outside of a rotating V-belt.
  • the processing elements are provided with bristles made of metal and can be inclined in the direction of rotation of the V-belt so that they can better penetrate into recesses in the workpiece.
  • the processing elements can also be designed as sandpaper, with support elements, preferably support fleeces or support felts, being arranged between the individual sanding sheets.
  • the sanding sheets are attached to a carrier element perpendicular to the direction of movement of the machining unit.
  • sandpaper or abrasive cloth hit the edges of the workpiece hard. The result is that the lower edges of the sanding sheets wear out and fray relatively quickly.
  • the object of the invention is to create an improved machining unit for a deburring machine in which the machining unit is moved over the surface of the workpiece to be deburred, in particular to create a machining unit specifically for removing light and moderately heavy burrs.
  • the solution to the problem posed is based on a processing unit according to the preamble of claim 1.
  • the object is achieved in that the sanding sheets are inclined against the direction of movement are mounted inclined on the carrier plate so that they fan out in the area of their lower edge.
  • the grinding sheets are not, as has been the case up to now, perpendicular to the surface of the workpiece to be deburred, but rather have an inclined position opposite to the direction of movement.
  • the sanding sheets therefore form an obtuse angle with the carrier plate.
  • two adjacent sanding sheets are no longer congruent on top of one another, but are arranged offset from one another. This means that the lower edges of the sanding sheets do not form a closed surface, but a stair-like contour.
  • the edge slides more easily and with less frictional resistance on the inclined sanding sheet than would be the case with a perpendicular or even inclined sanding sheet in the direction of movement. Due to the flexibility of the sanding sheets, they will already bend against the direction of movement after a short period of use, which leads to further fanning out in the area of the lower edges and thus exposing larger areas of the sanding sheets. Depending on the flexibility of the sanding sheets used, an approximately flat sanding surface is even formed parallel to the upper side of the workpiece to be deburred after a certain service life, formed from the lower bent areas of the individual sanding sheets. The grinding effect corresponds approximately to that of a grinding roller in which the direction of movement of the abrasive in the contact area is tangential or parallel to the surface of the workpiece.
  • a conventional machine for deburring and rounding with processing units, the sanding sheets of which are arranged vertically, can if necessary be relatively simple, namely by exchanging the processing units for processing units according to the invention with inclined sanding sheets, can be converted to a machine specially designed for removing light burrs, which is then characterized by the significantly longer service life of the processing units.
  • the angle enclosed by the sanding sheets and the flat underside of the carrier plate is preferably between 3 and 60 degrees, measured in the area of the upper edges of the sanding sheets near the carrier plate.
  • An inclination angle between 20 and 40 degrees, in particular around 30 degrees, is particularly preferred. It has been shown that at this angle there is a particularly good relationship between deburring performance on the one hand and wear resistance on the other.
  • the sanding sheets advantageously consist of sanding paper or sanding cloth coated with abrasive on one side, with the sanding side pointing in the direction of the workpiece.
  • the smooth side facilitates the mutual displacement of adjacent sanding sheets, which promotes the desired fanning out in the area of the lower edges.
  • the upper edge of the sandpaper or sandpaper is expediently glued to the carrier plate.
  • the carrier plate can have a circumferential, laterally protruding edge, which covers the upper area of the sandpaper or sanding cloth a little bit. This creates a kind of tub on the underside of the carrier plate, which can advantageously be filled with a plastic compound.
  • the upper edge of the sandpaper or abrasive cloth can then be immersed in this liquid plastic compound. After the plastic compound has hardened, the sandpaper or abrasive cloth are embedded to a certain extent in the plastic compound.
  • a thin plate made of a flexible elastic material, such as a plastic fleece, is arranged between each of the individual sanding sheets to increase the flexibility and elasticity of the package of sanding sheets lying on top of one another in some areas.
  • the resulting increased elasticity, especially in the area of the underside of the processing unit, means that unevenness of the workpiece can be leveled out and pressure peaks on the sanding sheets can be cushioned at the same time.
  • FIG. 1 only the essential part of a deburring machine can be seen, as far as this is important for understanding the invention.
  • Two parallel drive belts 1a, 1b run endlessly between two motor-driven belt wheels 2a, 2b.
  • Fastening brackets 3 with an L-shaped cross-section are screwed onto the drive belts 1 a, 1 b and carry machining units 4 that are configured in the manner of a brush.
  • the processing units 4, which belong to the upper drive belt 1a, are mirror images of the processing units 4, which sit on the lower drive belt 1b, opposite.
  • the processing units 4 comprise an essentially flat carrier plate 6.
  • Holding profiles 7a, 7b are formed on the upper side of the carrier plate 6, into which a bent tab of the mounting bracket 3 is inserted.
  • a latching tongue 8 engages with a recess of the mounting bracket 3 and thus ensures a firm, play-free seat of the carrier plate 6 on the mounting bracket 3.
  • the carrier plate 6 is injection-molded in one piece from plastic.
  • a protruding circumferential edge 9 is formed on the underside.
  • a package of sanding sheets 10 is attached to the flat underside of the carrier plate 6.
  • the sanding sheets 10 are rectangular and consist, for example, of sandpaper that is coated on one side with an abrasive abrasive.
  • a plurality of sanding sheets 10 are arranged parallel to one another on the carrier plate 6 and extend transversely to the direction of movement of the processing unit 4. In the drawing, the thickness of the sanding sheets 10 is shown exaggerated. In reality, a sanding sheet 10 has a thickness of, for example, 1 mm.
  • the individual sanding sheets 10 are fastened on the carrier plate 6 at an angle to the direction of movement (cf. arrow) of the processing unit 4. This inclination results in a fanning out of the sanding sheets 10 in the area of their lower edges.
  • the abrasive side of the sanding sheets 10 is thereby exposed to a certain extent.
  • the area encompassed by the edge 9 on the underside of the carrier plate 6 is encapsulated with a plastic compound 8.
  • the upper edge of the sanding sheets 10 is embedded in the plastic compound 11. In this way, the sanding sheets 10 are extremely firmly connected to the carrier plate 6.
  • the angle ⁇ between the sanding sheets 10 and the carrier plate 6 is approximately 35 degrees here, measured in the area of the upper edge of the sanding sheets 10.
  • the sanding sheets 10 are arranged against the direction of movement of the processing unit 4, so that the side of the sanding sheets covered with abrasive is in the direction of the workpiece 5 shows.
  • the grinding side of the sanding sheets 10 therefore meet the front one at an oblique angle - in Figure 3 right - edges of the workpiece 5 in order to deburr them or to round them slightly.
  • Figure 4 illustrates this process and shows the wear to which the sanding sheets 10 are subject.
  • the abrasive paper is worn down by grinding down the abrasive grains until the backing material is exposed. This then quickly rubs off on the edges of the metal workpiece, exposing the adjacent layer of sandpaper piece by piece.
  • the sanding sheets 10 After a certain idle time, the sanding sheets 10 have bent backwards and at the same time upwards, that is to say away from the workpiece 5, to such an extent that the total height of the machining unit 4 has been significantly reduced. At the same time, the sanding sheets 10 have fanned out further in the area of their lower edges, so that a larger part of their sanding side is no longer covered by the respectively adjacent sanding sheet 10, but is exposed. The package of sanding sheets 10 thereby forms an almost flat surface on its underside, which runs approximately parallel to the upper side of the workpiece 5.
  • the abrasive of the sanding sheets 10 essentially only comes into contact with the upper side of the workpiece 5 and only to a small extent its vertical edges.
  • the effectively grinding surface of the processing unit 4 has increased significantly compared to a fresh processing unit in which the sanding sheets 10 are more or less straight (cf. Figure 3 ).
  • the degree of bending of the grinding sheets 10 can be varied and optimized by the contact pressure of the processing unit 4 on the workpiece 5. If necessary, the bending of the sanding sheets 10 can be achieved by inserting thin plates 12 (cf. Fig. 4 ) made of a flexible elastic material, such as fleece or felt, between the individual sanding sheets 10 increase or possibly decrease.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (7)

  1. Unité d'usinage pour une machine pour ébavurer une pièce plane, pour laquelle l'unité d'usinage passe sur la surface de la pièce à ébavurer, avec
    une plaque de support (6) pour l'essentielle plane,
    un ensemble de feuilles abrasives souples rectangulaires (10), qui sont disposées parallèlement les unes aux autres sur la plaque de support (6) et s'étendent transversalement au sens de déplacement de l'unité d'usinage (4),
    caractérisée en ce que
    les feuilles abrasives individuelles (10) sont fixées inclinées sur la plaque de support (6) en biais par rapport au sens de déplacement de l'unité d'usinage (4), ce qui a pour résultat un déploiement en éventail des feuilles abrasives dans la zone de leurs bords inférieurs.
  2. Unité d'usinage selon la revendication 1, caractérisée en ce que l'angle entre les feuilles abrasives (10) et la plaque de support se situe entre 3 et 60 degrés, de préférence entre 20 et 40 degrés dans la zone du bord supérieur des feuilles abrasives (10).
  3. Unité d'usinage selon l'une quelconque des revendications précédentes, caractérisée en ce que les feuilles abrasives (10) sont composées de papier émeri ou de toile émeri recouvert d'un produit abrasif d'un côté, sachant que le côté abrasif est tourné en direction de la pièce (5).
  4. Unité d'usinage selon l'une quelconque des revendications précédentes, caractérisée en ce que les feuilles abrasives (10) sont collées avec leur bord supérieur sur la plaque de support (6).
  5. Unité d'usinage selon la revendication 4, caractérisée en ce que la plaque de support (6) possède un bord périphérique (9), dépassant latéralement, dont une pièce recouvre la zone supérieure des feuilles abrasives (10).
  6. Unité d'usinage selon la revendication 4 ou 5, caractérisée en ce qu'une masse de matière plastique (11) est coulée sur la face inférieure de la plaque de support (6), dans laquelle les feuilles abrasives (10) sont encastrées avec leur arête supérieure.
  7. Unité d'usinage selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'une plaque mince (12) dans un matériau élastique souple est respectivement disposée entre les feuilles abrasives individuelles (10).
EP16725359.0A 2015-05-08 2016-05-04 Unité d'usinage destinée à une machine d'ébarbage d'une pièce plate Active EP3294497B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16725359T PL3294497T3 (pl) 2015-05-08 2016-05-04 Zespół do obróbki do maszyny do usuwania zadziorów z powierzchniowego detalu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202015102354.5U DE202015102354U1 (de) 2015-05-08 2015-05-08 Bearbeitungseinheit für eine Maschine zum Entgraten eines flächigen Werkstücks
PCT/EP2016/000727 WO2016180520A1 (fr) 2015-05-08 2016-05-04 Unité d'usinage destinée à une machine d'ébarbage d'une pièce plate

Publications (2)

Publication Number Publication Date
EP3294497A1 EP3294497A1 (fr) 2018-03-21
EP3294497B1 true EP3294497B1 (fr) 2022-01-05

Family

ID=53372544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16725359.0A Active EP3294497B1 (fr) 2015-05-08 2016-05-04 Unité d'usinage destinée à une machine d'ébarbage d'une pièce plate

Country Status (8)

Country Link
EP (1) EP3294497B1 (fr)
CN (1) CN206084639U (fr)
DE (1) DE202015102354U1 (fr)
DK (1) DK3294497T3 (fr)
ES (1) ES2906609T3 (fr)
PL (1) PL3294497T3 (fr)
PT (1) PT3294497T (fr)
WO (1) WO2016180520A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016220766B4 (de) * 2016-10-21 2018-08-23 Boeck Gmbh Werkzeug zum Bearbeiten eines Objektes
DE202017103217U1 (de) 2017-05-29 2017-06-23 Arku Maschinenbau Gmbh Schleifblock
CN112338643B (zh) * 2020-10-28 2022-06-10 西北工业大学 一种砂布页轮的纵向及斜向抛光方法
CN114083390B (zh) * 2021-11-26 2023-03-24 天津津航技术物理研究所 一种非球面研磨加工装置及非球面加工方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07132453A (ja) * 1993-11-09 1995-05-23 Seiwa Kogyo Kk 研磨装置
DE20106234U1 (de) * 2001-04-10 2001-06-21 Mb Maschb Gmbh Schleifvorrichtung
DE202005011640U1 (de) * 2005-07-25 2005-10-13 Lissmac Maschinenbau Und Diamantwerkzeuge Gmbh Vorrichtung zum Bearbeiten eines metallischen Werkstücks
JP2013039647A (ja) * 2011-08-19 2013-02-28 Nitolex Honsha:Kk 研磨布紙および研磨体
PT2792450E (pt) 2013-04-19 2016-03-02 Arku Maschb Gmbh Máquina de rebarbar

Also Published As

Publication number Publication date
CN206084639U (zh) 2017-04-12
PL3294497T3 (pl) 2022-03-21
ES2906609T3 (es) 2022-04-19
EP3294497A1 (fr) 2018-03-21
PT3294497T (pt) 2022-02-24
WO2016180520A1 (fr) 2016-11-17
DE202015102354U1 (de) 2015-05-22
DK3294497T3 (da) 2022-02-28

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