EP0941807A1 - Dispositif de surfaçage pour matériaux durs - Google Patents

Dispositif de surfaçage pour matériaux durs Download PDF

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Publication number
EP0941807A1
EP0941807A1 EP98104426A EP98104426A EP0941807A1 EP 0941807 A1 EP0941807 A1 EP 0941807A1 EP 98104426 A EP98104426 A EP 98104426A EP 98104426 A EP98104426 A EP 98104426A EP 0941807 A1 EP0941807 A1 EP 0941807A1
Authority
EP
European Patent Office
Prior art keywords
grinding
socket
arm
blocks
block
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Withdrawn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
EP98104426A
Other languages
German (de)
English (en)
Inventor
Sven Wallin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP98104426A priority Critical patent/EP0941807A1/fr
Publication of EP0941807A1 publication Critical patent/EP0941807A1/fr
Withdrawn legal-status Critical Current

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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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B24B41/0475—Grinding heads for working on plane surfaces equipped with oscillating abrasive blocks, e.g. mounted on a rotating head

Definitions

  • the present invention relates to an apparatus for surfacing and polishing stone, marbles and other hard materials in the form of blocks, plates or sheets, with a mechanism for causing a rubbing or grinding tool to execute a combination of a rotative and oscillating movement along a surface to be treated, said tool including any number of arms carrying at least one treatment block each, having a constantly translating parallel self cleansing line contact with said surface to be treated for performing a rubbing or grinding action thereon.
  • Apparatuses for surfacing or polishing stones etc. usually include a rotating grinding head comprising a cylindrical disc having mounted thereon a number of rubbing or grinding blocks which during rotation of the disc are pressed against the surface to be treated under simultaneous supply of water to the working zone of the grinding blocks.
  • the grinding blocks are provided with a grinding portion comprising diamond grains or other abrasive grains, the abrasive effect being obtained by moving said grinding block or blocks over a surface to be polished and at the same time pressing the grinding blocks against said surface.
  • the grinding surface of the grinding blocks is plane, said blocks being rigidly or rotatably attached to the grinding head.
  • One serious disadvantage inherent in this design is that dirt and mud will collect underneath and in front of the grinding blocks, thus tending to clog the pores of the grinding blocks, thereby preventing accurate grinding action of said grinding blocks.
  • the grinding blocks in addition to being rotated about the rotational axis of the grinding head, also are made to move with respect to the grinding head.
  • This relative movement may include different types of movement.
  • the grinding blocks may thus be made to rotate about any additional axis or to perform an oscillating movement in the radial or in the tangential direction with respect to the grinding head.
  • the grinding blocks are designed so as to provide linear contact between the grinding blocks and the surface to be treated, which results in increased pressure against the surface and improved grinding action.
  • This also results in that the grinding blocks will be kept clean due to the fact that mud and grinding dust formed at the grinding action, is discharged radially under the influence of the centrifugal forces instead of clogging the abrasive surface of the grinding blocks.
  • Known apparatuses of this kind usually include a grinding head provided with a number of grinding blocks, e.g. four grinding blocks, which are supported at the ends of arms which are pivotably mounted on axes extending radially with respect to the grinding head. Said arms are shaped as double-armed levers, the opposite end of which co-operates with an executor mechanism that is supported by the grinding head and during rotation thereof is caused to positively pivot the grinding blocks back and forth along a certain angle as a consequence of the rotation of the grinding head.
  • a grinding head provided with a number of grinding blocks, e.g. four grinding blocks, which are supported at the ends of arms which are pivotably mounted on axes extending radially with respect to the grinding head. Said arms are shaped as double-armed levers, the opposite end of which co-operates with an executor mechanism that is supported by the grinding head and during rotation thereof is caused to positively pivot the grinding blocks back and forth along a certain angle as a consequence of the rotation of the grinding head.
  • the arms, supporting the grinding blocks at the ends thereof are caused to perform a swinging or oscillating movement about said radially extending axes.
  • Said grinding head is driven by means of an electric motor.
  • Known grinding heads of this kind may include two, four or six grinding blocks, the grinding head having a diameter of 200-600 mm and being driven for rotation with a rotary speed of 200-600 rpm. Each grinding block may e.g. be made to perform one full oscillation for every fifteen revolutions of the grinding head.
  • the object of the present invention is to provide a grinding head for surfacing or polishing stone, marbles, etc. of the kind mentioned initially, including a mechanism for oscillating the grinding blocks, in which the disadvantages of the known apparatuses, mainly the heavy wear of the socket retainers that results in high maintenance and service costs as well as in a short lifetime of the apparatus in essence are eliminated.
  • Another object of the present invention is to provide a grinding head of the kind mentioned in which the magnitude of the oscillatory movement of the grinding blocks may be considerably increased.
  • said socket is so mounted, that both tangential and radial forces carried over from the grinding blocks into tapering grooves of said carrier, are uniformly translated from the same into each arm where they are uniformly absorbed by at least dual and at least partly cylindrical reaction elements, being constantly brought along together with the rotating and oscillating movement of said grinding blocks.
  • one object of the invention is to provide a simple mechanism for imparting a considerably increased oscillatory movement to grinding blocks for surfacing or polishing stone, marbles etc., and simultaneously increasing the reliability thereof.
  • By increasing the oscillatory movement the efficiency of an apparatus according to the invention will be much increased.
  • FIG 1 schematically shows the principles used when designing said mechanism. To obtain a fuller understanding of the following explanation of the principle illustrated in FIG 1, reference is also made to FIGS 2 and 3 since all reference numerals referred to are not indicated in FIG 1 but may be found in FIGS 2 or 3.
  • FIG 1 discloses two grinding blocks 1 disposed opposite each other and in line with each other.
  • Each grinding block 1 is rigidly attached to a lever L, extending in direction upwards in relation to the surface S and being attached at the opposite end to a shaft 3, extending in parallel with and at a certain distance above said block 1.
  • Each shaft 3 is journalled in a bearing 4, rigidly supported by a housing H, shown in FIG 2.
  • Rigidly attached to the opposite end of each shaft 3 is a guiding rod 5, extending from said shaft 3 in direction upwards through an elongated slot 6 in a circular disc 7, excentrically disposed inside the housing H.
  • Said disc 7 is supported in said housing H by means of a vertical drive shaft 8, centrally disposed in said housing and supported in the upper part thereof by means of a bearing 8' providing radial as well as axial support.
  • the disc 7 is attached to said drive shaft by means of an excenter 9, which is rotatably supported in a bearing in the central part of said disc.
  • said excenter 9 is illustrated as a crank web rotatably attached to the center point 10 of said disc 7.
  • this relative rotational movement is combined with a varying balance of moments between each pair of grinding blocks 1, further increasing the support of this oscillating movement.
  • the above mentioned angular limit positions are determined by the design of the elongated slots 6, which slots determine the outer limits for the movement of the guiding rods 5.
  • FIG 2 discloses the main parts of the apparatus according to the invention.
  • the apparatus is shown in a partial side view with its overall arrangement A for imparting said oscillating movement to grinding blocks contained in sockets 11.
  • the apparatus comprise two arms 2 arranged perpendicularly to each other.
  • the arm 2 situated in the middle of FIG 2 its socket 11 has a tapered dove-tail groove 12 for the mounting of said grinding block. Due to said taper, from the center and out, a grinding block can be retained in a socket 11 due only to its location and the fact that as a consequence of the rotation its arm is fixed harder and harder to the socket due to the centrifugal force as the rotational speed of the arm increases.
  • each arm 2 is given an oscillatory movement from an angle of + ⁇ /2 to - ⁇ /2 during its rotation.
  • reaction elements 13 can be seen constituting part of the solution to keep the grinding blocks and their sockets in a fixed relationship.
  • the details of this solution are, however, more clearly seen and described in connection with FIG 3 below.
  • FIG 3 shows a partial central cross section corresponding to FIG 2, and reveals relevant internal details of the apparatus according to the invention. Also this illustration lacks the surfacing or grinding blocks needed when using the apparatus.
  • the mounting of the sockets 11 is, however, clearly shown. Constituted of three main parts each, one center socket mount 14 and two side portions 15, are heavily bolted together.
  • the side portion 15 on the trailing side of each grinding block unit has between itself and each socket 11 two springs 23 that can withold aproximately 150N, which is the approximate load from the carrier during service at full speed.
  • the purpose of the springs 23 is to achieve a dampening effect during running in of new grinding blocks.
  • the interstitium between the socket 11 and each side portion is filled with Teflon®-sealings 22.
  • Each socket 11 is held in two "vertical" cylindrical bearing blocks 16a and 16b, each in itself held to the arm 2 with bolts 17 either in a thread 17a or with a nut 17b on the outside, as on the reaction element 13. Due to the physical extension of the reaction element 13, it is necessary to manufacture each arm 2 in at least two parts in order to make drilling for the shaft 3 possible.
  • the upper part of each arm 2 and the rest of each arm are as a consequence preferably mounted together with bolts and nuts, the mounting surface therebetween preferably also comprising steering pins and holes (not shown).
  • the first bearing block 16a is fixed to the arm 2, which also is the case with the second bearing block 16b. In the interstitium between each of these blocks and each reaction element liners 20 are fixed on either one of the parts working together.
  • vertical compression springs 19 are arranged between each socket 11 and its arm 2 for making the initial contact between the surface S to be treated and the surfacing or polishing blocks 1 as lenient as possible when initialising a working operation.
  • the springs 19 also serves to balance potential irregularities on the surface S to be treated. Irregularities small as 0,01 mm, causes severe strokes to the grinding head.
  • a felt gasket 24 is arranged at the inner end of each socket 11 for stopping stone material together with water to penetrate the space 25 between the sockets 11 and their arms 2.
  • reaction elements 16a, 16b are made longer the more peripheral they are. In consequence thereof the mean thickness of these reaction elements 16a, 16b, which in this embodiment are cylindrical can be greater the more peripheral they are.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP98104426A 1998-03-12 1998-03-12 Dispositif de surfaçage pour matériaux durs Withdrawn EP0941807A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98104426A EP0941807A1 (fr) 1998-03-12 1998-03-12 Dispositif de surfaçage pour matériaux durs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98104426A EP0941807A1 (fr) 1998-03-12 1998-03-12 Dispositif de surfaçage pour matériaux durs

Publications (1)

Publication Number Publication Date
EP0941807A1 true EP0941807A1 (fr) 1999-09-15

Family

ID=8231573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104426A Withdrawn EP0941807A1 (fr) 1998-03-12 1998-03-12 Dispositif de surfaçage pour matériaux durs

Country Status (1)

Country Link
EP (1) EP0941807A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115401593A (zh) * 2022-10-03 2022-11-29 衡阳市雅典娜石英石有限公司 一种石英石板材加工表面处理抛光装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3601636A1 (de) * 1986-01-21 1987-07-23 Hensel Eisenwerk Schleifkopf
US4965965A (en) * 1988-07-06 1990-10-30 Wallin Sven E Grinding head for surfacing and polishing stone, marbles and other hard materials
DE4119679A1 (de) * 1990-06-22 1992-01-02 Dario Toncelli Perfektionierter schwingender werkzeughalter fuer schleif- und/oder poliermaschinen zur behandlung von oberflaechen aus natur- und verbundsteinmaterialien

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3601636A1 (de) * 1986-01-21 1987-07-23 Hensel Eisenwerk Schleifkopf
US4965965A (en) * 1988-07-06 1990-10-30 Wallin Sven E Grinding head for surfacing and polishing stone, marbles and other hard materials
DE4119679A1 (de) * 1990-06-22 1992-01-02 Dario Toncelli Perfektionierter schwingender werkzeughalter fuer schleif- und/oder poliermaschinen zur behandlung von oberflaechen aus natur- und verbundsteinmaterialien

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115401593A (zh) * 2022-10-03 2022-11-29 衡阳市雅典娜石英石有限公司 一种石英石板材加工表面处理抛光装置
CN115401593B (zh) * 2022-10-03 2023-12-26 衡阳市雅典娜石英石有限公司 一种石英石板材加工表面处理抛光装置

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