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EP0602333A1 - Disque à ponces des surfaces de pièces - Google Patents

Disque à ponces des surfaces de pièces Download PDF

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Publication number
EP0602333A1
EP0602333A1 EP93115489A EP93115489A EP0602333A1 EP 0602333 A1 EP0602333 A1 EP 0602333A1 EP 93115489 A EP93115489 A EP 93115489A EP 93115489 A EP93115489 A EP 93115489A EP 0602333 A1 EP0602333 A1 EP 0602333A1
Authority
EP
European Patent Office
Prior art keywords
segments
grinding wheel
gaps
adhesive
grinding
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.)
Withdrawn
Application number
EP93115489A
Other languages
German (de)
English (en)
Inventor
Udo Dipl.-Ing. Mertens
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.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
Original Assignee
Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ernst Winter and Sohn Diamantwekzeuge GmbH and Co filed Critical Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Publication of EP0602333A1 publication Critical patent/EP0602333A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • 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

Definitions

  • the invention relates to a grinding wheel for machining workpiece surfaces according to the preamble of patent claim 1.
  • the shape of a generic grinding wheel or its grinding surface is essentially defined by its inside and outside diameter, which can have different values depending on the application (grinding wheel geometry).
  • grinding wheel geometry In the known grinding wheel, for example, three segmented rings are provided for the grinding surface. In terms of the shape of the segments, this means that three sets of different sized segments are required. If the dimensions are changed inside and / or outside, new sets of segments are necessary. Each grinding wheel geometry therefore requires separate sets of segments, which means a considerable effort in production and storage.
  • the segments and the segment rings are spaced from one another for the passage of a coolant.
  • the annular gaps prevent an overlap in the circumferential direction, so that the shape of the annular gap can undesirably form on the workpiece.
  • the geometry also means that the distances or gaps between the segments are fixed from the outset. The distances cannot be changed for a given geometry and dimensions of the segments. For relatively small workpieces, the gap width between the segments should be as small as possible. In other cases, a larger gap width is desirable.
  • the known grinding wheel can therefore only be used for workpieces of a certain size.
  • Each segment in a sector inevitably has a different one Contour. As many sets of segments are required as the sectors have segments. In addition, a change in the grinding wheel geometry again requires differently shaped sets of segments, so that a correspondingly large number of differently shaped segments must be produced for a certain number of differently dimensioned work surfaces. Since the segments are usually manufactured using molds, a correspondingly large number of different molds must be kept.
  • the segments of the last-mentioned publications necessarily have acute angles. If such segments are produced, as is generally customary, for example by sintering or ceramic firing, there is a risk that, particularly in the region of the acute angles, stresses are caused which can lead to fractures when the segments are subsequently handled or ground, which, for example, can result in a significant risk to people. Sharp angles also have the disadvantage that the steel mold required for briquetting may not be filled evenly. Different hardnesses of the segments are to be expected after the molding process. It is also difficult or impossible to check hardness and density of segments in the area of the acute angles, as breakages can easily occur.
  • Sharp-angled segments are also easily exposed to damage during automatic assembly. They undergo different warm-ups during processing and are characterized by an uneven shrinkage behavior during manufacture.
  • the invention has for its object to provide a grinding wheel for machining workpiece surfaces, the grinding surface can be composed of uniform segments regardless of their dimensions.
  • the segments forming the work surface have an equilateral hexagon shape with the width across flats SW.
  • the edge length can be, for example, 10 to 20 mm.
  • the size of the hexagonal segments is not important. It is expediently chosen according to the size range in which the ring-shaped work surface lies. It is expedient if the dimensions are chosen such that a plurality of segments lie in the radial direction between the inner and the outer circumference of the working surface.
  • the hexagon shape has the advantage that an annular work surface can be evenly covered with uniform segments regardless of the inside and outside diameter.
  • the distances between the segments can be selected as required, depending on the machining requirements and the size of the workpieces to be machined.
  • gaps can be provided between the segments. They can have the same width across the entire work surface. Alternatively, they can also be of different widths, for example increasing or decreasing the width from the inside to the outside. But it is also possible to occupy the work area without gaps.
  • the unitary segments of the invention may be of the same material. However, since the working conditions are dependent on the diameter, among other things (various Peripheral speeds), it may be desirable to give the segments a different quality from the inside to the outside in order to create uniform working conditions over the diameter of the working surface, for example by means of different grain sizes of the abrasive, different abrasive concentration or bond composition. On the other hand, it may be desirable to achieve different work results in different diameter ranges, for example coarser working radially inside and finer working radially outside. This can be achieved by the different grain size or concentration of the abrasive for the segments.
  • gaps between adjacent segments creates flow paths for the passage of coolant, which is supplied, for example, from the inside.
  • the course of the flow paths due to the hexagon shape requires a relatively long residence time of the coolant before it flows off at the circumference.
  • the dwell time can be increased further in that, according to one embodiment of the invention, the outwardly opening gaps are partially or completely closed, for example with the aid of an adhesive which is also used to connect the segments to the carrier disk.
  • adhesive can also be arranged in the columns such that the level of the adhesive in the columns increases from the inside to the outside.
  • the invention has a number of significant advantages.
  • the hexagon shape of the segments enables unit dimensions for the segments regardless of the disc geometry. An overlap in the circumferential and tangential direction is always guaranteed during processing.
  • the hexagon shape of the segments according to the invention has the advantage that they can be produced with low stress due to the obtuse angles, for example by sintering or ceramic firing, so that the risk of cracking or breakage is very low.
  • the filling of steel molds for the production of hexagonal segments can also done evenly so that a uniform hardness and density can be achieved over the dimensions of the segments.
  • Hexagonal segments can also be easily checked for hardness and density without the risk of breaking.
  • the hexagon shape also facilitates uniform shrinkage and warm-up behavior during manufacture.
  • FIG. 2 shows an annular cylindrical carrier disk 10 which carries an abrasive coating 12 with a possible hard material-free base 12a, which is fastened on the carrier disk 10 with the aid of an adhesive layer 14.
  • the structure of the grinding wheel is shown in Fig. 3 and fig. 3a more clearly.
  • the abrasive coating 12 in more detail. As can be seen, it consists of a large number of equilateral hexagonal segments 16 of identical geometric configuration.
  • the segments are formed from a suitable abrasive material, for example by a suitable briquetting and / or sintering process.
  • the segments are from a predetermined constant thickness, ie their working surface and their contact surface are plane-parallel. They are also arranged at a predetermined distance a from one another. The distance a can be chosen variably, for example 0 to 5 mm.
  • the annular grinding surface 12 is delimited by an outer circumference 18 and an inner circumference 20.
  • a carrier disk has the circumference 30 (Fig. 4 / Fig. 4a). Its center lies at 32.
  • a gauge 36 (FIG. 5) has a toothing 38 on two longitudinal sides such that the toothing corresponds to a row of hexagons lined up side by side (FIG. 6), the key width of which is, for example, the key width of the segments 16 plus distance a corresponds, as indicated by dashed lines 40 (Fig. 6).
  • Such a teaching is, for example, placed diametrically over the carrier disk 30, corresponding to the dash-dotted line 42 (FIG. 4).
  • the segments 16 are then inserted and glued into the gaps in the toothing 38.
  • the gauge 36 is then removed, so that further segments 16 are inserted into the gaps that then remain can be.
  • the gauge 36 is dimensioned so that in the described system of the segments 16 in the toothing 38, the desired distance is already obtained when the in the gaps between parallel rows of segments Segments can be used for the middle row. Then the gauge 36 can then be placed on an already fastened row of segments 16 in order to attach further rows of segments.
  • the segments can also be adapted to an annular work surface before being attached to the carrier body.
  • the outwardly opening gaps can be closed, for example with adhesive, as shown at 48.
  • Adhesive can also be filled into the column 50, as shown at 52. It is therefore possible to arbitrarily change the flow cross-section through the gaps 50, for example to form a flow cross-section that decreases from the inside to the outside. This counteracts the fact that for a coolant supplied on the inside, the overall flow cross section increases from the inside to the outside.
  • the segments 16 can be made of the same material with the same grain size and consistency. However, it is possible to provide segments of different hardness and density with different grain sizes in order to change the nature of the segments 16 with regard to their removal quality from the inside out, for example in order to keep the removal quality constant with a naturally varying circumferential speed or to deliberately bring about different removal properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP93115489A 1992-12-02 1993-09-25 Disque à ponces des surfaces de pièces Withdrawn EP0602333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4240476A DE4240476A1 (de) 1992-12-02 1992-12-02 Schleifscheibe zum spangebenden Bearbeiten von Werkstückflächen
DE4240476 1992-12-02

Publications (1)

Publication Number Publication Date
EP0602333A1 true EP0602333A1 (fr) 1994-06-22

Family

ID=6474175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115489A Withdrawn EP0602333A1 (fr) 1992-12-02 1993-09-25 Disque à ponces des surfaces de pièces

Country Status (3)

Country Link
US (1) US5470273A (fr)
EP (1) EP0602333A1 (fr)
DE (1) DE4240476A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2289881A1 (es) * 2005-07-19 2008-02-01 Andres Lopez Fernandez Sistema de paneles de aluminio para revestimientos y comformacion de paramentos.

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700636C2 (de) * 1997-01-10 1999-08-12 Brasseler Gmbh & Co Kg Geb Schleifwerkzeug für Dentalzwecke
EP1007283A4 (fr) * 1997-05-09 2002-05-08 Rodel Inc Tampons a polir mosaiques et procedes afferents
USD406514S (en) * 1997-08-06 1999-03-09 Frank Ali Sanding block
USD406516S (en) * 1997-08-06 1999-03-09 Frank Ali Sanding block
USD406224S (en) * 1997-08-06 1999-03-02 Frank Ali Sanding block
USD406515S (en) * 1997-08-06 1999-03-09 Frank Ali Sanding block
USD406517S (en) * 1997-08-06 1999-03-09 Frank Ali Sanding block
USD406037S (en) * 1997-08-06 1999-02-23 Frank Ali Sanding block
DE19756537A1 (de) * 1997-12-18 1999-07-01 Wacker Siltronic Halbleitermat Verfahren zum Erzielen eines möglichst linearen Verschleißverhaltens und Werkzeug mit möglichst linearem Verschleißverhalten
US6217330B1 (en) * 1998-01-08 2001-04-17 Karl-Heinz Danger Dental tool for surface treatment
JP2918883B1 (ja) * 1998-07-15 1999-07-12 日本ピラー工業株式会社 研磨パッド
US6120569A (en) * 1998-09-23 2000-09-19 Kuo; Ching-An Method for production and structure of stone pattern processing mills
DE19939258A1 (de) * 1999-08-19 2001-03-08 Wacker Siltronic Halbleitermat Werkzeug und Verfahren zum abrasiven Bearbeiten einer im wesentlichen ebenen Fläche
US20020173247A1 (en) * 2000-10-20 2002-11-21 Hyatt Gregory A. Machining device and methods
DE20204685U1 (de) 2002-03-23 2002-07-25 Nozar GmbH, 59387 Ascheberg Schleifscheibe
USD568133S1 (en) * 2005-12-20 2008-05-06 Struers A/S Cutting disc
USD684611S1 (en) * 2009-07-02 2013-06-18 Buff And Shine Manufacturing, Inc. Buffing pad

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE497723A (fr) * 1949-08-24 1951-02-23
FR1104941A (fr) * 1954-05-19 1955-11-25 Perfectionnement aux meules notamment aux meules diamant
US3343306A (en) * 1965-01-11 1967-09-26 Engelhard Hanovia Inc Surfacing system
US4918872A (en) * 1984-05-14 1990-04-24 Kanebo Limited Surface grinding apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724222A (en) * 1953-08-04 1955-11-22 Norton Co Pulpstone
US5247765A (en) * 1991-07-23 1993-09-28 Abrasive Technology Europe, S.A. Abrasive product comprising a plurality of discrete composite abrasive pellets in a resilient resin matrix

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE497723A (fr) * 1949-08-24 1951-02-23
FR1104941A (fr) * 1954-05-19 1955-11-25 Perfectionnement aux meules notamment aux meules diamant
US3343306A (en) * 1965-01-11 1967-09-26 Engelhard Hanovia Inc Surfacing system
US4918872A (en) * 1984-05-14 1990-04-24 Kanebo Limited Surface grinding apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2289881A1 (es) * 2005-07-19 2008-02-01 Andres Lopez Fernandez Sistema de paneles de aluminio para revestimientos y comformacion de paramentos.
ES2289881B1 (es) * 2005-07-19 2008-11-16 Andres Lopez Fernandez Sistema de paneles de aluminio para revestimientos y conformacion de paramentos.

Also Published As

Publication number Publication date
US5470273A (en) 1995-11-28
DE4240476A1 (de) 1994-06-16

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