CA1055254A - Abrasive machine for stones - Google Patents
Abrasive machine for stonesInfo
- Publication number
- CA1055254A CA1055254A CA255,422A CA255422A CA1055254A CA 1055254 A CA1055254 A CA 1055254A CA 255422 A CA255422 A CA 255422A CA 1055254 A CA1055254 A CA 1055254A
- Authority
- CA
- Canada
- Prior art keywords
- abrasive
- work
- piece
- housing
- main gear
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0038—Other grinding machines or devices with the grinding tool mounted at the end of a set of bars
-
- 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
- B24B7/224—Portal grinding machines; Machines having a tool movable in a plane
Abstract
ABSTRACT OF THE DISCLOSURE
An abrasive machine for stones, which comprises one or more abrasive units and means for feeding the stones, each of said units having a plurality of abrasive tools each provided with a grindstone rotat-ably mounted thereto, said abrasive tools being arranged and driven along a circular line, whereby each of said grindstones can not only rotate but also revolve to grind and polish the stone surface contacting thereto.
An abrasive machine for stones, which comprises one or more abrasive units and means for feeding the stones, each of said units having a plurality of abrasive tools each provided with a grindstone rotat-ably mounted thereto, said abrasive tools being arranged and driven along a circular line, whereby each of said grindstones can not only rotate but also revolve to grind and polish the stone surface contacting thereto.
Description
1 The present invention relates to an abrasive machine for stones, and more particularly to such machine for grinding-polishing a flat stone surface with the circle flat surface of a rotary abrasive disk tool of which level is made adjustable in relation to the stone surface.
Various kinds of stones such as marble, granite and the like have been used for various purposes. Depending on the purposes or uses, a fairly large area of stone plate is subjected to grinding and polishing at the exterior side thereof, e.g. for flooring, wall construction and the like.
Hitherto, the abrasion or grinding-polishing of such stone work-piece has been carried out by grinding the stone surface with the circle flat surface of a rotating disk grindstone made of an abrasive material such as particles or chips of natural or synthetic diamond, carborundum or the like and suitable binder. Such grindstone is detachably mounted on a disk head adapted to be rotated and manually moved over the stone surfaceJ
As occasion demands, such grindstone is exchanged with a finer grinstone one ater another, and finally with a felt for polish-ing or finishing the stone surface with aid of finely pulverizedabrasive material.
In order to avoid troublesome exchange of the grindstone and make the abrasion working efficient, it is possible to arrange a plurality of such grinding machines in series so as to process the work-piece by and by from rough grinding according to the first machine to final polishing according to the last machine. It is invevitable, however, that there is caused undulation or uneveness more or less on the processed work-piece surface when the stone plate is of fairly large area relative to the dimension of the abrasive tool, since a suitable width of the stone plate is subjected to grinding by manually driving the rotating abrasive tool to-~nd-fro over the stone plate
Various kinds of stones such as marble, granite and the like have been used for various purposes. Depending on the purposes or uses, a fairly large area of stone plate is subjected to grinding and polishing at the exterior side thereof, e.g. for flooring, wall construction and the like.
Hitherto, the abrasion or grinding-polishing of such stone work-piece has been carried out by grinding the stone surface with the circle flat surface of a rotating disk grindstone made of an abrasive material such as particles or chips of natural or synthetic diamond, carborundum or the like and suitable binder. Such grindstone is detachably mounted on a disk head adapted to be rotated and manually moved over the stone surfaceJ
As occasion demands, such grindstone is exchanged with a finer grinstone one ater another, and finally with a felt for polish-ing or finishing the stone surface with aid of finely pulverizedabrasive material.
In order to avoid troublesome exchange of the grindstone and make the abrasion working efficient, it is possible to arrange a plurality of such grinding machines in series so as to process the work-piece by and by from rough grinding according to the first machine to final polishing according to the last machine. It is invevitable, however, that there is caused undulation or uneveness more or less on the processed work-piece surface when the stone plate is of fairly large area relative to the dimension of the abrasive tool, since a suitable width of the stone plate is subjected to grinding by manually driving the rotating abrasive tool to-~nd-fro over the stone plate
- 2 - ~
1 surface, and when such area has been treated the work-piece is moved so as to further process the new area of the stone plate.
Considerable skill is required for driving such abrasive tool without causing such uneveness. In order to avoid such undersired undulation and make the abrasion working more efficient7 it is considered to enlarge diameter of the disk grindstone as far as possible. It will be readily understood, however, that there is naturally a limitation in doing so because of the mechanical strength of the formed grindstone on the one hand and of rattling 10 of the rotary disk on the other hand.
According to the invention, there are circumferentially arranged a plurality of rotary abrasive tool disks and the assembly of these abrasive tools each rotating is adapted to be rotated so that each abrasive tool is driven to cause rotation and con-currently revolution. The work-piece is successively fed so that the surface thereof is subjected to abrasion working of these rotating and revolving abrasive tools during the slow travel of the stone plate. Each grindstone of each of said abrasive tools may be exchanged with finer one, when the rough grinding 20 has been completed. It is preferable, however, to provide a plurality of such machines in series for proceeding with continuous grinding and polishing of the work piece fed through these machines one after anotherO
A principal object of the present invention is, therefore, to provide an abrasive machine for stones which can obviate and overcome the disadvantages and faults encountered in the conventional machine as referred to above.
Further objects of the invention and advantages to be attained thereby will be appreciated by understanding following 30 explanations which shall be given with reference to one of typical conventional abrasive machines and a preferred embodiment as a mere example of the invention, as illustrated in drawings, 1 in which Fig. 1 is a perspective view of a typical conventional abrasive machine;
Fig. 2 is a vertical side view of an abrasive machine according to the invention, some parts thereof being shown in fragment or section; and Fig. 3 is a diagrammatic top plan view of the machine as illustrated in Fig.2 to show an arrangement of grindstones and mechanisms for causing rotation and revolution of each grindstone.
In Fig. 1, a conventional typical abrasive machine for stones is generally designated by reference symbol A. The machine A has a machine body B and a bench or working table C
which is arranged separately from but closely to the machine body B and on which a stone plate D as work-piece is positioned. The machine body B comprises an up-right support Bl having a lower base portion and an upper cylindrical portion, a slidable member B2 fitted on the upper cylindrical portion of the support Bl, an abrasive tool B3 detachably mounted with a grindstone or g~ind~-~ng disk B4, an electric motor B5 for rota~ngly driving 20 the abrasive tool B3 to cause rotation of the grindstone B4, an articularly connected arm member B6, one end of which is pivotally connected to the slidable member B2 to serve as a support for mounting the electric motor B5 and the abrasive tool B3 mounted with the grindstone B4 at the other or free end thereof, and a handle B7 for manually operating the machine.
According to the conventional stone abrasive machine A, a machine operator must, in the first place, operate~the handle B7 to turn the abrasive tool B3 outside the table C, so that the work-piece D which may be manually or mechanically fed can be 30 set in position on the table C. Then the operator operates again the handle B7 to raise the abrasive tool B3 a little, return and lower the same on the wor~-piece D, so that the grindstone B4 1 attached to the lower end of the abrasive tool B3 contacts the outer surface of the work-piece D. In abrasive working operation of the machine A, the operator turns-on a switch (not shown) to actuate the electric motor B5 to cause rotation of the abrasive tool B3 and consequently the grindstone B4 attached thereto and, at the same time, operates the handle B7 to horizontally move the abrasive tool B3 on the surface of the work-piece D
to-and-fro to grind and polish the same.
While Figs. 2 and 3 illustrate an embodiment of an abrasive 10 machine according to the present invention. The machine as generally designated by reference numeral 10 comprises a base 12, a frame structure 14 mounted on the base 12 and having two vertical side frames 141,141 and a horizontal top frame 142, a mechanism 16 arranged on the base 12 to feed a stone plate 18 as work-piece, an abrasion unit 20 arranged above the feeding mechanism 16 and between the side frames 141,141 of the frame structure 14, electric motors 22, 24 for actuating the abrasion unit 20, and means 26 for supporting the abrasion unit 200 The work-piece feeding mechanism 16 may be of a roller 20 conveyor as illustrated, chain conveyor, belt conveyor or the like but it is preferable to arrange thereon a flat metal or wood plate 1~1 as a carrier, so that the work-piece can be horizontally and stably held thereon. The conveyor may be actuated by an electric motor (not shown), an output shaft of which is connected to a shaft end 162 of one of the rollers through suitable reduc-tion gearings (not shown). The other shaft end 163 is connected to corresponding shaft end of the other rollers through an endless belt or the like transmission means (not shown) to form the roller conveyor as the work-piece feeding mechanism 16. The abrasion 30 unit 20 has a head portion 201 carried by the supporting means 26 and a leg portion 202 which comprises a plurality of abrasive tools 28 arranged along a circle around a central vertical axis 1 of the abrasion unit 20, each of said abrasive tools 28 having a grindstone or grinding disk 281 which was made of abrasive material such as synthetic diamond particles or chips and binder.
According to the abrasive machine 10 of the present invention, each of the grindstones 281 can be only not rotated but also revolved and thus it is not always necessary to make the diameter of each grindstone 281 so large for increasing the abrasion work-ing efficiency of the machine. This makes the production and handling of the grindstone 281 quite easy. The abrasion unit 10 supporting means 26 comprises a box-like member 261 for carrying the abrasion unit 20 and a slidable means 262,262, each of which may be secured to the box member 261 at one side and secured on the inner surface of the vertical side frame 141 of the frame structure 14 at the other side.
In operation of the machine 10 as shown in Figs. 2 and 3, a machine operator turns-on a switch (not shown) to actuate the electric motors 22 and 24. An output of the motor 22 is transmitted to a main shaft 203 of the abrasion unit 20 through a pulley 221 mounted on an output shaft 222 of the motor 22, 20 another pulley 204 mounted on the main shaft 203 at one end thereof and an endless belt 30 for mechanically connecting the pulleys 221 and 204, to cause rotation of a main gear 205 mounted on the main shaft 203 at the other end. Each of a plurality of small gears 282 for the abrasive tools 28 meshes with the main gear 205 so as to be rotatingly driven by the main gear 205. The rotation of each small gear 282 causes rotation of the concerned grindstone or grinding disk 281 attached to the lower end of a shaft 283 of each abrasive tool 28, on which the small gear 281 is securedly mounted. A hollow cylindrical 30 housing 206 for accomodating the main gear 205, small gears 282 and maintaining the shafts 283 of the abrasive tools 28 in position has a rack 207 on an outer peripheral surface thereof.
1 The rack 207 meshes with a pinion 32 rotatingly driven by the electric motor 24 through a coupling means 34, to cause revolution of each abrasive tools 28 and more particularly each rotary grindstone 281. The work-piece 18 can continuously be fed by the work-piece feeding mechanism 16, as stated hereinbefore, to grind and/or polish the outer surface of the work-piece 18 by the rotating and revolving grindstones 281.
A level of the abrasion unit 20 and more particularly a gap or distance between the lower end surface of the grindstones 10 281 and the upper suface of the work-piece 18 can be adjusted by operating the slidable means 262, depending on the thickness of work-piece to be treated.
The grindstones 281 for each abrasion unit 20 may have same or different roughness. The roughness of the grindstones 281 may be selected depending on surface characteristics and kind of work-piece 18 to be worked.
The abrasive machine 10 according to the present invention may be modified to a continuous abrasive machine, by subsequently feeding the work-pieces 18 therein with the aid of the feeding 20 mechanism 16 and by arranging a plurality of abrasive units 20 in series so that roughness of the grindstones of the respective unit are made gradually finer. According to such machine, the work-pieces can continuQusly be worked from rough grinding to polishing or finishing, whereby the working ability can consider-ably be improved in comparison with any conventional machine.
The invention will now be further explained with reference to an example showing the grinding-polishing ability o~ the continuous abrasive machine according to the present invention.
Example A plurality of cut plates (width: 60 cm) of granite from Paochon (Korea) was subsequently fed into the following abrasive machine at feeding velocity of 1.5 m/min. which means the working 1 area is 54 m2/hr., to continuously grind and polish one side surface of the stone plate.
Abrasive Machine The abrasive machine used was substantially same with that as illustrated in Figs. 2 and 3 and had following measures.
Number of abrasive units: 15 Number of abrasive tools or grindstones for each unit: 12 Diameter of each grindstone: 12 cm Abrasive material for each grindstone excepting the final unit which uses a conventional felt for buffing:
synthetic diamond particle or chip Particle size of abrasive material for grindstones:
For 1st and 2nd abrasive units: 40 to 50 meshes (metal bonded) For 3rd and 4th abrasive units: 60 to 80 meshes (metal bonded) For 5th and 6th abrasive units:100 to 120 meshes (metal bonded) For 7th and 8th abrasive units:170 to 200 meshes (metal bonded) For 9th and 10th abrasive units:170 to 200 meshes (resin bonded) For 11th and 12th abrasive units: 12 to 25 ~ (resin bonded) For 13th!-~and ~4th abrasive un~ts: 4 to 8~ (resin bonded) The stone plates were ground by thickness of 1.0 mm when those had been passed through the second abrasive unit and the thickness of each plate were finally reduced by 3.0 mm. The surface of each worked plate showed a very high flatness and very fine burnish.
1 surface, and when such area has been treated the work-piece is moved so as to further process the new area of the stone plate.
Considerable skill is required for driving such abrasive tool without causing such uneveness. In order to avoid such undersired undulation and make the abrasion working more efficient7 it is considered to enlarge diameter of the disk grindstone as far as possible. It will be readily understood, however, that there is naturally a limitation in doing so because of the mechanical strength of the formed grindstone on the one hand and of rattling 10 of the rotary disk on the other hand.
According to the invention, there are circumferentially arranged a plurality of rotary abrasive tool disks and the assembly of these abrasive tools each rotating is adapted to be rotated so that each abrasive tool is driven to cause rotation and con-currently revolution. The work-piece is successively fed so that the surface thereof is subjected to abrasion working of these rotating and revolving abrasive tools during the slow travel of the stone plate. Each grindstone of each of said abrasive tools may be exchanged with finer one, when the rough grinding 20 has been completed. It is preferable, however, to provide a plurality of such machines in series for proceeding with continuous grinding and polishing of the work piece fed through these machines one after anotherO
A principal object of the present invention is, therefore, to provide an abrasive machine for stones which can obviate and overcome the disadvantages and faults encountered in the conventional machine as referred to above.
Further objects of the invention and advantages to be attained thereby will be appreciated by understanding following 30 explanations which shall be given with reference to one of typical conventional abrasive machines and a preferred embodiment as a mere example of the invention, as illustrated in drawings, 1 in which Fig. 1 is a perspective view of a typical conventional abrasive machine;
Fig. 2 is a vertical side view of an abrasive machine according to the invention, some parts thereof being shown in fragment or section; and Fig. 3 is a diagrammatic top plan view of the machine as illustrated in Fig.2 to show an arrangement of grindstones and mechanisms for causing rotation and revolution of each grindstone.
In Fig. 1, a conventional typical abrasive machine for stones is generally designated by reference symbol A. The machine A has a machine body B and a bench or working table C
which is arranged separately from but closely to the machine body B and on which a stone plate D as work-piece is positioned. The machine body B comprises an up-right support Bl having a lower base portion and an upper cylindrical portion, a slidable member B2 fitted on the upper cylindrical portion of the support Bl, an abrasive tool B3 detachably mounted with a grindstone or g~ind~-~ng disk B4, an electric motor B5 for rota~ngly driving 20 the abrasive tool B3 to cause rotation of the grindstone B4, an articularly connected arm member B6, one end of which is pivotally connected to the slidable member B2 to serve as a support for mounting the electric motor B5 and the abrasive tool B3 mounted with the grindstone B4 at the other or free end thereof, and a handle B7 for manually operating the machine.
According to the conventional stone abrasive machine A, a machine operator must, in the first place, operate~the handle B7 to turn the abrasive tool B3 outside the table C, so that the work-piece D which may be manually or mechanically fed can be 30 set in position on the table C. Then the operator operates again the handle B7 to raise the abrasive tool B3 a little, return and lower the same on the wor~-piece D, so that the grindstone B4 1 attached to the lower end of the abrasive tool B3 contacts the outer surface of the work-piece D. In abrasive working operation of the machine A, the operator turns-on a switch (not shown) to actuate the electric motor B5 to cause rotation of the abrasive tool B3 and consequently the grindstone B4 attached thereto and, at the same time, operates the handle B7 to horizontally move the abrasive tool B3 on the surface of the work-piece D
to-and-fro to grind and polish the same.
While Figs. 2 and 3 illustrate an embodiment of an abrasive 10 machine according to the present invention. The machine as generally designated by reference numeral 10 comprises a base 12, a frame structure 14 mounted on the base 12 and having two vertical side frames 141,141 and a horizontal top frame 142, a mechanism 16 arranged on the base 12 to feed a stone plate 18 as work-piece, an abrasion unit 20 arranged above the feeding mechanism 16 and between the side frames 141,141 of the frame structure 14, electric motors 22, 24 for actuating the abrasion unit 20, and means 26 for supporting the abrasion unit 200 The work-piece feeding mechanism 16 may be of a roller 20 conveyor as illustrated, chain conveyor, belt conveyor or the like but it is preferable to arrange thereon a flat metal or wood plate 1~1 as a carrier, so that the work-piece can be horizontally and stably held thereon. The conveyor may be actuated by an electric motor (not shown), an output shaft of which is connected to a shaft end 162 of one of the rollers through suitable reduc-tion gearings (not shown). The other shaft end 163 is connected to corresponding shaft end of the other rollers through an endless belt or the like transmission means (not shown) to form the roller conveyor as the work-piece feeding mechanism 16. The abrasion 30 unit 20 has a head portion 201 carried by the supporting means 26 and a leg portion 202 which comprises a plurality of abrasive tools 28 arranged along a circle around a central vertical axis 1 of the abrasion unit 20, each of said abrasive tools 28 having a grindstone or grinding disk 281 which was made of abrasive material such as synthetic diamond particles or chips and binder.
According to the abrasive machine 10 of the present invention, each of the grindstones 281 can be only not rotated but also revolved and thus it is not always necessary to make the diameter of each grindstone 281 so large for increasing the abrasion work-ing efficiency of the machine. This makes the production and handling of the grindstone 281 quite easy. The abrasion unit 10 supporting means 26 comprises a box-like member 261 for carrying the abrasion unit 20 and a slidable means 262,262, each of which may be secured to the box member 261 at one side and secured on the inner surface of the vertical side frame 141 of the frame structure 14 at the other side.
In operation of the machine 10 as shown in Figs. 2 and 3, a machine operator turns-on a switch (not shown) to actuate the electric motors 22 and 24. An output of the motor 22 is transmitted to a main shaft 203 of the abrasion unit 20 through a pulley 221 mounted on an output shaft 222 of the motor 22, 20 another pulley 204 mounted on the main shaft 203 at one end thereof and an endless belt 30 for mechanically connecting the pulleys 221 and 204, to cause rotation of a main gear 205 mounted on the main shaft 203 at the other end. Each of a plurality of small gears 282 for the abrasive tools 28 meshes with the main gear 205 so as to be rotatingly driven by the main gear 205. The rotation of each small gear 282 causes rotation of the concerned grindstone or grinding disk 281 attached to the lower end of a shaft 283 of each abrasive tool 28, on which the small gear 281 is securedly mounted. A hollow cylindrical 30 housing 206 for accomodating the main gear 205, small gears 282 and maintaining the shafts 283 of the abrasive tools 28 in position has a rack 207 on an outer peripheral surface thereof.
1 The rack 207 meshes with a pinion 32 rotatingly driven by the electric motor 24 through a coupling means 34, to cause revolution of each abrasive tools 28 and more particularly each rotary grindstone 281. The work-piece 18 can continuously be fed by the work-piece feeding mechanism 16, as stated hereinbefore, to grind and/or polish the outer surface of the work-piece 18 by the rotating and revolving grindstones 281.
A level of the abrasion unit 20 and more particularly a gap or distance between the lower end surface of the grindstones 10 281 and the upper suface of the work-piece 18 can be adjusted by operating the slidable means 262, depending on the thickness of work-piece to be treated.
The grindstones 281 for each abrasion unit 20 may have same or different roughness. The roughness of the grindstones 281 may be selected depending on surface characteristics and kind of work-piece 18 to be worked.
The abrasive machine 10 according to the present invention may be modified to a continuous abrasive machine, by subsequently feeding the work-pieces 18 therein with the aid of the feeding 20 mechanism 16 and by arranging a plurality of abrasive units 20 in series so that roughness of the grindstones of the respective unit are made gradually finer. According to such machine, the work-pieces can continuQusly be worked from rough grinding to polishing or finishing, whereby the working ability can consider-ably be improved in comparison with any conventional machine.
The invention will now be further explained with reference to an example showing the grinding-polishing ability o~ the continuous abrasive machine according to the present invention.
Example A plurality of cut plates (width: 60 cm) of granite from Paochon (Korea) was subsequently fed into the following abrasive machine at feeding velocity of 1.5 m/min. which means the working 1 area is 54 m2/hr., to continuously grind and polish one side surface of the stone plate.
Abrasive Machine The abrasive machine used was substantially same with that as illustrated in Figs. 2 and 3 and had following measures.
Number of abrasive units: 15 Number of abrasive tools or grindstones for each unit: 12 Diameter of each grindstone: 12 cm Abrasive material for each grindstone excepting the final unit which uses a conventional felt for buffing:
synthetic diamond particle or chip Particle size of abrasive material for grindstones:
For 1st and 2nd abrasive units: 40 to 50 meshes (metal bonded) For 3rd and 4th abrasive units: 60 to 80 meshes (metal bonded) For 5th and 6th abrasive units:100 to 120 meshes (metal bonded) For 7th and 8th abrasive units:170 to 200 meshes (metal bonded) For 9th and 10th abrasive units:170 to 200 meshes (resin bonded) For 11th and 12th abrasive units: 12 to 25 ~ (resin bonded) For 13th!-~and ~4th abrasive un~ts: 4 to 8~ (resin bonded) The stone plates were ground by thickness of 1.0 mm when those had been passed through the second abrasive unit and the thickness of each plate were finally reduced by 3.0 mm. The surface of each worked plate showed a very high flatness and very fine burnish.
Claims (4)
1. An abrasive machine for grinding a work-piece essentially comprising:
a base member;
a frame structure including a pair of vertical side members and a top member securely mounted on top ends of the vertical side members;
said frame structure being installed on said base member;
means arranged above said base member for feeding the work-piece; and at least one abrasion unit which is arranged above said feeding means and comprising:
i) a head portion supported by said frame structure through a means sliding on and along said vertical side members;
ii) a central axis member extending through the head portion lengthwise, having one end connected to an output shaft of a first electric motor through a transmission means and having the other end on which a main gear is securely mounted; and iii) a leg portion having a hollow cylindrical housing which encases the main gear arranged in mesh and concentrically with the main gear and said housing includes an annular rack in mesh with a pinion connected to an output shaft of a second electric motor for revolution of the smaller gears about the central axis of the main gear, each of said smaller gears carrying an abrasive tool with a grindstone detachably mounted thereto.
a base member;
a frame structure including a pair of vertical side members and a top member securely mounted on top ends of the vertical side members;
said frame structure being installed on said base member;
means arranged above said base member for feeding the work-piece; and at least one abrasion unit which is arranged above said feeding means and comprising:
i) a head portion supported by said frame structure through a means sliding on and along said vertical side members;
ii) a central axis member extending through the head portion lengthwise, having one end connected to an output shaft of a first electric motor through a transmission means and having the other end on which a main gear is securely mounted; and iii) a leg portion having a hollow cylindrical housing which encases the main gear arranged in mesh and concentrically with the main gear and said housing includes an annular rack in mesh with a pinion connected to an output shaft of a second electric motor for revolution of the smaller gears about the central axis of the main gear, each of said smaller gears carrying an abrasive tool with a grindstone detachably mounted thereto.
2. An abrasive machine as set forth in claim 1, wherein the work-piece is a stone.
3. An abrasive machine for grinding a work-piece comprising:
a base member;
a frame structure including a pair of vertical side members and a top member securely mounted on top ends of the vertical side members; said frame structure being mounted on said base member;
means arranged above said base member for continuously feeding the work-piece;
a plurality of abrasion units, each of which is positioned above said feeding means, arranged in series and comprises:
i) a first housing supported between the vertical side members and in sliding contact therewith, so that the height of the first housing can be adjusted;
ii) a central shaft member extending through the first housing substantially parallel to the vertical side members, having one end connected to an output shaft of a first electric motor through a transmission means and having the other end connected securely to a main gear;
iii) a second housing which encases the main gear and a plurality of smaller gears arranged around and in concentrical manner with the main gear to mesh therewith, each of the smaller gears being rotatably mounted on a shaft journaled in the second housing, said second housing having on its outer periphery an annular rack in mesh with a pinion connected to an output shaft of a second electric motor for revolution of the smaller gears about a longitudinal axis of said central shaft.
4. An abrasive machine as set forth in claim 3, wherein said abrasion unit further comprises abrasive tools carried by
a base member;
a frame structure including a pair of vertical side members and a top member securely mounted on top ends of the vertical side members; said frame structure being mounted on said base member;
means arranged above said base member for continuously feeding the work-piece;
a plurality of abrasion units, each of which is positioned above said feeding means, arranged in series and comprises:
i) a first housing supported between the vertical side members and in sliding contact therewith, so that the height of the first housing can be adjusted;
ii) a central shaft member extending through the first housing substantially parallel to the vertical side members, having one end connected to an output shaft of a first electric motor through a transmission means and having the other end connected securely to a main gear;
iii) a second housing which encases the main gear and a plurality of smaller gears arranged around and in concentrical manner with the main gear to mesh therewith, each of the smaller gears being rotatably mounted on a shaft journaled in the second housing, said second housing having on its outer periphery an annular rack in mesh with a pinion connected to an output shaft of a second electric motor for revolution of the smaller gears about a longitudinal axis of said central shaft.
4. An abrasive machine as set forth in claim 3, wherein said abrasion unit further comprises abrasive tools carried by
Claim 4 continued...
each of the smaller gears and having a grindstone which is detachably mounted to a free end thereof in which the abrasive grindstones on each abrasive tool for the same abrasive unit contain synthetic diamond particles of substantially the same size, and such abrasive units are so arranged in such a series that the size of the diamond particles is made gradually smaller in a work-piece forwarding direction, whereby the work-piece can continuously be worked from a rough grinding to polish finishing.
each of the smaller gears and having a grindstone which is detachably mounted to a free end thereof in which the abrasive grindstones on each abrasive tool for the same abrasive unit contain synthetic diamond particles of substantially the same size, and such abrasive units are so arranged in such a series that the size of the diamond particles is made gradually smaller in a work-piece forwarding direction, whereby the work-piece can continuously be worked from a rough grinding to polish finishing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50080234A JPS523798A (en) | 1975-06-26 | 1975-06-26 | Multiple continuous stone material grinding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055254A true CA1055254A (en) | 1979-05-29 |
Family
ID=13712644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA255,422A Expired CA1055254A (en) | 1975-06-26 | 1976-06-22 | Abrasive machine for stones |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS523798A (en) |
| BR (1) | BR7604223A (en) |
| CA (1) | CA1055254A (en) |
| DE (2) | DE2628552A1 (en) |
| IN (1) | IN155739B (en) |
| IT (1) | IT1063435B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910001987Y1 (en) * | 1988-08-12 | 1991-03-30 | 박경 | Edge-grinder for plate glass |
| CN100460154C (en) * | 2005-05-24 | 2009-02-11 | 蔡墩军 | Bi-three-jaw shaped contrarotating planetary grinding head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1211752A (en) * | 1967-08-29 | 1970-11-11 | Engelhard Hanovia Inc | Improvements in or relating to resin-bonded articles |
-
1975
- 1975-06-26 JP JP50080234A patent/JPS523798A/en active Pending
-
1976
- 1976-06-22 IN IN1105/CAL/76A patent/IN155739B/en unknown
- 1976-06-22 CA CA255,422A patent/CA1055254A/en not_active Expired
- 1976-06-25 IT IT24722/76A patent/IT1063435B/en active
- 1976-06-25 DE DE19762628552 patent/DE2628552A1/en active Pending
- 1976-06-25 DE DE7620180U patent/DE7620180U1/en not_active Expired
- 1976-06-28 BR BR7604223A patent/BR7604223A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT1063435B (en) | 1985-02-11 |
| IN155739B (en) | 1985-03-02 |
| DE2628552A1 (en) | 1977-01-13 |
| DE7620180U1 (en) | 1977-09-22 |
| BR7604223A (en) | 1977-04-05 |
| JPS523798A (en) | 1977-01-12 |
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