CA2342481C - Improved grinding apparatus - Google Patents
Improved grinding apparatus Download PDFInfo
- Publication number
- CA2342481C CA2342481C CA 2342481 CA2342481A CA2342481C CA 2342481 C CA2342481 C CA 2342481C CA 2342481 CA2342481 CA 2342481 CA 2342481 A CA2342481 A CA 2342481A CA 2342481 C CA2342481 C CA 2342481C
- Authority
- CA
- Canada
- Prior art keywords
- grinding
- bits
- grinding apparatus
- frame
- machine
- 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 - Lifetime
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
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
- B24B3/33—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of drills for stone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/001—Arrangements compensating weight or flexion on parts of the machine
-
- 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
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
- B24B27/04—Grinding machines or devices in which the grinding tool is supported on a swinging arm
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A grinding apparatus for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM), said grinding apparatus consisting of a frame supporting a table for holding one or more bits to be ground, a grinding machine carried by an arm or lever system journaled on a rod attached to a frame, said grinding machine being mounted wherein means are provided to preferably provide a biased load, optionally adjustable, to said grinding machine when said table is preferably tilted and wherein the table is provided with one or more apertures to hold one or more bits to be ground.
Description
TITLE: IMPROVED GRINDING APPARATUS
BACKGROUND OF THE INVENTION
The present invention relates to improvements in apparatus for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM
and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drill bit or cutter.
In drilling operations the cutting teeth (buttons) on the drill bits or cutters become flattened (worn) after continued use. Regular maintenance of the drill bit or cutter by regrinding (sharpening) the buttons to restore them to substantially their original profile enhances the bit/cutter life, speeds up drilling and reduces drilling costs. Regrinding should be undertaken when the wear of the buttons is optimally one third to a maximum of one-half the button diameter.
Different manual and semi-automatic grinding machines are known for grinding button bits/cutters (see for example U.S. Patent Nos. 5,193,312 and 5,070,654). In a conventional type of machine a grinding cup having the desired profile is rotated at high speed to grind the carbide button and the face of the bit/cutter surrounding the base of the button to restore the button to substantially its original profile for effective drilling.
C.M.E. Mining & Blasting Equipment Ltd. (~~CME") has developed a range of grinding machines including hand held grinders, single arm and double arm self centering
BACKGROUND OF THE INVENTION
The present invention relates to improvements in apparatus for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM
and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drill bit or cutter.
In drilling operations the cutting teeth (buttons) on the drill bits or cutters become flattened (worn) after continued use. Regular maintenance of the drill bit or cutter by regrinding (sharpening) the buttons to restore them to substantially their original profile enhances the bit/cutter life, speeds up drilling and reduces drilling costs. Regrinding should be undertaken when the wear of the buttons is optimally one third to a maximum of one-half the button diameter.
Different manual and semi-automatic grinding machines are known for grinding button bits/cutters (see for example U.S. Patent Nos. 5,193,312 and 5,070,654). In a conventional type of machine a grinding cup having the desired profile is rotated at high speed to grind the carbide button and the face of the bit/cutter surrounding the base of the button to restore the button to substantially its original profile for effective drilling.
C.M.E. Mining & Blasting Equipment Ltd. (~~CME") has developed a range of grinding machines including hand held grinders, single arm and double arm self centering
2 machines for setting up two or more bits to be ground, mobile machines for grinding on the road or in a workshop (the CME JuniorTM grinder) and grinders designed specifically for mounting on drill rigs, service vehicles or set up in the shop (CME Mini JuniorTM). While the present invention is applicable to all grinding machines (except hand held grinders) the invention is particularly applicable to mobile grinding apparatus of the type described in U.S. Patent No. 5,193,312 or distributed by CME under the Junior or Mini Junior designations.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a front plan view of one embodiment of an improved grinding apparatus according to the present invention having a grinding machine carried for vertical and horizontal adjustment by an arm or lever system journaled on a stand or frame and with a tiltable table for holding the bit to be ground;
FIG. 2 is a front plan view of the frame for the grinding apparatus of Fig. 1.
FIG 3 is a left side plan view of the frame of FIG. 2;
FIG. 4 is a right side view of the frame of FIG. 2;
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a front plan view of one embodiment of an improved grinding apparatus according to the present invention having a grinding machine carried for vertical and horizontal adjustment by an arm or lever system journaled on a stand or frame and with a tiltable table for holding the bit to be ground;
FIG. 2 is a front plan view of the frame for the grinding apparatus of Fig. 1.
FIG 3 is a left side plan view of the frame of FIG. 2;
FIG. 4 is a right side view of the frame of FIG. 2;
3 FIG. 5 is a front plan view of the arm or lever system of FIG. 1;
FIG. 6 is a top plan view of the arm or lever system of FIG. 5;
FIG. 7 is a top plan view of the tiltable table, for holding the bits to be ground, of the grinding apparatus of FIG. 1;
FIG. 8 is a right side plan view of the table of FIG. 7;
and FIG. 9 is a plan view of bottom of the frame of FIG. 2 with a splash guard.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
With reference to the FIGS, one embodiment of an improved grinding apparatus according to the present invention is generally indicated at 1. While the present invention is applicable to all grinding apparatus having a grinding machine carried for vertical and horizontal adjustment by an arm or lever system journaled on a stand or frame and preferably with a tiltable table for holding the bit to be ground, the grinding apparatus shown is of the type intended to be mounted on drill rigs, service vehicles or set up in the shop such as the CME Mini JuniorT" grinders.
The grinding apparatus 1 consists of a frame 2 supporting a table 3 for holding one or more bits to be ground. The frame 2 of the illustrated embodiment consists of a generally rectangular box 4 having a back panel 5, left and right side walls 6, 7 normal to said back panel, two extending support
FIG. 6 is a top plan view of the arm or lever system of FIG. 5;
FIG. 7 is a top plan view of the tiltable table, for holding the bits to be ground, of the grinding apparatus of FIG. 1;
FIG. 8 is a right side plan view of the table of FIG. 7;
and FIG. 9 is a plan view of bottom of the frame of FIG. 2 with a splash guard.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
With reference to the FIGS, one embodiment of an improved grinding apparatus according to the present invention is generally indicated at 1. While the present invention is applicable to all grinding apparatus having a grinding machine carried for vertical and horizontal adjustment by an arm or lever system journaled on a stand or frame and preferably with a tiltable table for holding the bit to be ground, the grinding apparatus shown is of the type intended to be mounted on drill rigs, service vehicles or set up in the shop such as the CME Mini JuniorT" grinders.
The grinding apparatus 1 consists of a frame 2 supporting a table 3 for holding one or more bits to be ground. The frame 2 of the illustrated embodiment consists of a generally rectangular box 4 having a back panel 5, left and right side walls 6, 7 normal to said back panel, two extending support
4 arms 8, 9, a top plate 12, bottom plate 10 and hinged cover 11.
A grinding machine 13 is carried by an arm or lever system, generally indicated at 14, journaled on a cylinder rod 15 of cylinder 16 attached to the frame 2. A
compressed air connection 17 is provided to operate various aspects of the grinding apparatus as discussed in detail below.
Table 3 is tiltably mounted to the frame 2 at pivot points 18,19 on the appropriate places of the extending arms 8, 9 on frame 2 (see FIGS 3 and 4). The table 3 is provided with one or more apertures 20 to hold one more bits to be ground. A bit (not shown) is positioned in aperture 20 and positioned with the button to be ground in the vertical position. The bit is held in place by pressure plate 22 controlled by a locking cylinder 23. The locking cylinder can be backed off slightly to rotate the bit (to the next button to be ground) within the aperture 20 without full release of the pressure on the locking cylinder.
The grinding machine 13 in order to properly regrind a worn button must be aligned over the longitudinal axis of the button. Accordingly to regrind the gauge buttons, table 3 is tilted to correspond to the angle at which the gauge button are mounted in the bit. The bit is then indexed in the table so that the longitudinal axis of the button to be ground is in the vertical. The means of tilting table 3 is best illustrated with reference to FIGS
2, 7 and 8. The front edge of right side 7 is bent to form an inwardly extending flange 25. A longitudinal slot 24 is provided in flange 2. A scale 26 is preferably provided to ' S
indicate the angle at which the table 3 will be tilted. A
stop 27 is positioned within the slot 24 at the desired angle and locked in place by lever 28. Once set for a particular bit type, the angle is fixed and doesn't have to be reset for each bit or button to be reground. A cylinder 29 is connected to stop 27 and the end 30 of the cylinder rod 31 is connected to the side 32 of table 3 at point 33.
When air is fed to cylinder 29, retraction of the rod 31 will tilt table 3 until the rod is fully retracted. As shown in FIG. 1, controls, generally indicated at 34, for tilting the table and locking the bits) in place are provided on the instrumentation panel 35 on the hinged protective cover 11. One switch 36 controls the cylinder 29 for tilting the table 3 and a second switch 37 controls the locking cylinder 23 and pressure plate 22. Flow controls are provided to regulate the speed of movement of the table and the pressure plate.
Large down the hole bits to be reground typically have a relatively long shaft that fits through aperture 20.
In order to regrind smaller bits a floor plate 38 that can be slid in and out of position under aperture 20 is provided. Knob 39 and slot 40 in table 3 control the location of the floor plate 38. Adapters for holding multiple small sized bits can be inserted into aperture 20.
Use of the adapters eliminates repetitive set up time for the operator.
A splash guard 41 connected to bottom plate of frame 2 is provided at the front of the grinding machine 13 that can be raised and lowered.
The arm system 14 for carrying and positioning grinding machine 13 as noted previously is journaled onto cylinder rod 15. With reference to FIGS 1, 5 and 6, the arm system 14 consists of a first arm section 42 having one end 43 journaled to cylinder rod 15. The other end 44 of the first arm section 42 provides the mount for the second arm section 45. The second arm section 45 is journaled to the first arm section 42. The other end 46 of the second arm section 45 is journaled to the back mount 47 connected to control box 48. Locking lever 49 allows control box 48, with back mount 47 and their journaled position in relation to the axis of the second arm section, to be locked. Cylinder 16 through cylinder rod 15 controls the vertical movement of the grinding machine up and down. Cylinder 16 through cylinder rod 15 provides a balance pressure to the arm system when the grinding machine 13 is not in sue and grinding pressure/feed when in use. The grinding balance pressure and pressure/feed can be adjusted.
Within the second control box 48, is a rotation motor 50 and bearing arrangement 51 for providing an orbital rotation to grinding machine 13. The grinding machine 13 is attached to control box 48 by means of plates 52, 53. The grinding machine 13 has an electric motor in the embodiment shown but can also utilize other motor type such as air or hydraulic motor. Each of the plates 52, 53 is provided with an acruate slot 54, 55. The angle of attachment of the grinding machine 13 relative to control box 48 can be adjusted by means of slots 54, 55 and locking lever 56. By having the grinding machine oscillate slightly off vertical, nipple formation on the button being reground is minimized and uneven wear on the grinding cup avoided.
When grinding buttons, the self-centering aspects of the grinding machine tend to center the grinding machine over the highest point on the button. On buttons where wear is uneven, typically gauge buttons, this may result in regrinding the button off center from its vertical axis. To substantially center the grinding machine over the longitudinal axis of the button, the second arm section 45 is provided with a cylinder 57 having one end 58 connected to for example the cylinder 7 16 and the other end 59 connected to the mount 60 of the second arm section 45. The cylinder 57 provides a biased load to grinding machine 13 to help center the grinding machine over the button. In the embodiment shown, the cylinder 57 is automatically activated when the table is tilted by the pilot feed from cylinder through valve 61 in instrumentation panel 35. The biased load causes the grinding machine to grind more on the inside of the gauge buttons thereby tending to shift the grinding machine over the true center of the button. The suitable biased load can be provided by other means such as counter weights, etc. In cases where deemed necessary, cylinder 57 could be used to lock the horizontal distance of grinding machine 13 from, for example, cylinder 16 and cylinder rod 15 or frame 2. Other methods such as mechanical locks can also be used for locking the horizontal distance of grinding machine 13 from, for example, cylinder 16 and cylinder rod 15 or frame 2.
In addition, variations of the same above described principle of biased loads or counter balancing can also be used to allow for grinding at angles other than vertical. Combinations of variations of the above described principle of biased side loads or counter balancing can be used to substantially eliminate the need for tilting/pivoting the bit when switching between grinding of face buttons and gauge buttons. This principle would be ideal in cases where tilting or pivoting of the bit is difficult due to size, weight, etc.
Having illustrated and described a preferred embodiment of the invention and certain possible modifications thereto, it should be apparent to those of ordinary skill in the art that the invention permits of further modification in arrangement and detail.
It will be appreciated that the above description related to the preferred embodiment by way of example only.
Many variations on the invention will be obvious to those knowledgeable in the field, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
A grinding machine 13 is carried by an arm or lever system, generally indicated at 14, journaled on a cylinder rod 15 of cylinder 16 attached to the frame 2. A
compressed air connection 17 is provided to operate various aspects of the grinding apparatus as discussed in detail below.
Table 3 is tiltably mounted to the frame 2 at pivot points 18,19 on the appropriate places of the extending arms 8, 9 on frame 2 (see FIGS 3 and 4). The table 3 is provided with one or more apertures 20 to hold one more bits to be ground. A bit (not shown) is positioned in aperture 20 and positioned with the button to be ground in the vertical position. The bit is held in place by pressure plate 22 controlled by a locking cylinder 23. The locking cylinder can be backed off slightly to rotate the bit (to the next button to be ground) within the aperture 20 without full release of the pressure on the locking cylinder.
The grinding machine 13 in order to properly regrind a worn button must be aligned over the longitudinal axis of the button. Accordingly to regrind the gauge buttons, table 3 is tilted to correspond to the angle at which the gauge button are mounted in the bit. The bit is then indexed in the table so that the longitudinal axis of the button to be ground is in the vertical. The means of tilting table 3 is best illustrated with reference to FIGS
2, 7 and 8. The front edge of right side 7 is bent to form an inwardly extending flange 25. A longitudinal slot 24 is provided in flange 2. A scale 26 is preferably provided to ' S
indicate the angle at which the table 3 will be tilted. A
stop 27 is positioned within the slot 24 at the desired angle and locked in place by lever 28. Once set for a particular bit type, the angle is fixed and doesn't have to be reset for each bit or button to be reground. A cylinder 29 is connected to stop 27 and the end 30 of the cylinder rod 31 is connected to the side 32 of table 3 at point 33.
When air is fed to cylinder 29, retraction of the rod 31 will tilt table 3 until the rod is fully retracted. As shown in FIG. 1, controls, generally indicated at 34, for tilting the table and locking the bits) in place are provided on the instrumentation panel 35 on the hinged protective cover 11. One switch 36 controls the cylinder 29 for tilting the table 3 and a second switch 37 controls the locking cylinder 23 and pressure plate 22. Flow controls are provided to regulate the speed of movement of the table and the pressure plate.
Large down the hole bits to be reground typically have a relatively long shaft that fits through aperture 20.
In order to regrind smaller bits a floor plate 38 that can be slid in and out of position under aperture 20 is provided. Knob 39 and slot 40 in table 3 control the location of the floor plate 38. Adapters for holding multiple small sized bits can be inserted into aperture 20.
Use of the adapters eliminates repetitive set up time for the operator.
A splash guard 41 connected to bottom plate of frame 2 is provided at the front of the grinding machine 13 that can be raised and lowered.
The arm system 14 for carrying and positioning grinding machine 13 as noted previously is journaled onto cylinder rod 15. With reference to FIGS 1, 5 and 6, the arm system 14 consists of a first arm section 42 having one end 43 journaled to cylinder rod 15. The other end 44 of the first arm section 42 provides the mount for the second arm section 45. The second arm section 45 is journaled to the first arm section 42. The other end 46 of the second arm section 45 is journaled to the back mount 47 connected to control box 48. Locking lever 49 allows control box 48, with back mount 47 and their journaled position in relation to the axis of the second arm section, to be locked. Cylinder 16 through cylinder rod 15 controls the vertical movement of the grinding machine up and down. Cylinder 16 through cylinder rod 15 provides a balance pressure to the arm system when the grinding machine 13 is not in sue and grinding pressure/feed when in use. The grinding balance pressure and pressure/feed can be adjusted.
Within the second control box 48, is a rotation motor 50 and bearing arrangement 51 for providing an orbital rotation to grinding machine 13. The grinding machine 13 is attached to control box 48 by means of plates 52, 53. The grinding machine 13 has an electric motor in the embodiment shown but can also utilize other motor type such as air or hydraulic motor. Each of the plates 52, 53 is provided with an acruate slot 54, 55. The angle of attachment of the grinding machine 13 relative to control box 48 can be adjusted by means of slots 54, 55 and locking lever 56. By having the grinding machine oscillate slightly off vertical, nipple formation on the button being reground is minimized and uneven wear on the grinding cup avoided.
When grinding buttons, the self-centering aspects of the grinding machine tend to center the grinding machine over the highest point on the button. On buttons where wear is uneven, typically gauge buttons, this may result in regrinding the button off center from its vertical axis. To substantially center the grinding machine over the longitudinal axis of the button, the second arm section 45 is provided with a cylinder 57 having one end 58 connected to for example the cylinder 7 16 and the other end 59 connected to the mount 60 of the second arm section 45. The cylinder 57 provides a biased load to grinding machine 13 to help center the grinding machine over the button. In the embodiment shown, the cylinder 57 is automatically activated when the table is tilted by the pilot feed from cylinder through valve 61 in instrumentation panel 35. The biased load causes the grinding machine to grind more on the inside of the gauge buttons thereby tending to shift the grinding machine over the true center of the button. The suitable biased load can be provided by other means such as counter weights, etc. In cases where deemed necessary, cylinder 57 could be used to lock the horizontal distance of grinding machine 13 from, for example, cylinder 16 and cylinder rod 15 or frame 2. Other methods such as mechanical locks can also be used for locking the horizontal distance of grinding machine 13 from, for example, cylinder 16 and cylinder rod 15 or frame 2.
In addition, variations of the same above described principle of biased loads or counter balancing can also be used to allow for grinding at angles other than vertical. Combinations of variations of the above described principle of biased side loads or counter balancing can be used to substantially eliminate the need for tilting/pivoting the bit when switching between grinding of face buttons and gauge buttons. This principle would be ideal in cases where tilting or pivoting of the bit is difficult due to size, weight, etc.
Having illustrated and described a preferred embodiment of the invention and certain possible modifications thereto, it should be apparent to those of ordinary skill in the art that the invention permits of further modification in arrangement and detail.
It will be appreciated that the above description related to the preferred embodiment by way of example only.
Many variations on the invention will be obvious to those knowledgeable in the field, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. ~A grinding apparatus for grinding the hard metal inserts or working tips (buttons) of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM), said grinding apparatus consisting of a frame supporting a table having one or more apertures for holding one or more bits to be ground, said table tiltably mounted within said frame and means to control the tilting of said table, a grinding machine carried for vertical and horizontal adjustment by an arm or lever system journaled on a rod attached to the frame, wherein the means to control the tilting action of the table consists of a slot provided in a side of the frame, a moveable stop within the slot that can be positioned and locked in place at the desired angle and a cylinder provided on the side of the frame having an end of the cylinder rod connected to the table.
2. ~A grinding apparatus according to claim 1 wherein means are provided to provide a biased side load to the grinding machine to assist with aligning the grinding machine with the longitudinal axis of the button to be ground, said biased side load provided when the table is titled.
3. ~A grinding apparatus according to any one of claim 1 or 2 wherein locking means are provided to lock a bit within said aperture and means to partially release the pressure to permit a bit to be rotated without full release of the locking means.
4. Grinding apparatus according to any one of claim 1, 2 or 3 wherein said grinding machine is provided with an adjustable splash guard.
5. Grinding apparatus according to any one of claim 1, 2, 3 or 4 having a multiple bit holder for insertion into said aperture in the table and wherein the multiple bit holder is adjustable to hold different sizes of bits and is provided with air actuated locking means.
6. A grinding apparatus according to claims 5 wherein the air actuated locking means are provided on said multiple bit holder to lock the bits within said bit holder and to partially release the pressure to permit the bits to be rotated without full release of the locking means.
7. A grinding apparatus according to any one of claims 1 to 6 wherein a floor plate is provided under said one or more apertures for holding one or more bits to be ground, said floor plate capable of being slid in and out of position to permit large down the hole bits having a long shaft and smaller bits to be reground.
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2342481 CA2342481C (en) | 2001-03-30 | 2001-03-30 | Improved grinding apparatus |
| RU2003103774/02A RU2250815C2 (en) | 2000-07-10 | 2001-07-10 | Improved sharpening device |
| CN01814766A CN1449321A (en) | 2000-07-10 | 2001-07-10 | Improved grinding apparatus |
| CA002414145A CA2414145C (en) | 2000-07-10 | 2001-07-10 | Grinding apparatus with articulated arm |
| KR1020037000259A KR100928749B1 (en) | 2000-07-10 | 2001-07-10 | Improved Polishing Device |
| JP2002508607A JP4129559B2 (en) | 2000-07-10 | 2001-07-10 | Improved polishing equipment |
| AU2001272260A AU2001272260B2 (en) | 2000-07-10 | 2001-07-10 | Grinding apparatus with articulated arm |
| GB0300496A GB2381768B (en) | 2000-07-10 | 2001-07-10 | Improved grinding apparatus |
| US10/332,629 US7198556B2 (en) | 2000-07-10 | 2001-07-10 | Grinding apparatus |
| BRPI0112441-2A BR0112441B1 (en) | 2000-07-10 | 2001-07-10 | grinding apparatus. |
| PCT/CA2001/000991 WO2002004169A2 (en) | 2000-07-10 | 2001-07-10 | Grinding apparatus with articulated arm |
| NO20030095A NO321027B1 (en) | 2000-07-10 | 2003-01-09 | grinder |
| FI20030029A FI125440B (en) | 2000-07-10 | 2003-01-09 | Grinding machine with an articulated shaft |
| SE0300016A SE525559C2 (en) | 2000-07-10 | 2003-01-09 | Grinding device for grinding tunnel boring machine inserts, step drilling machine inserts or pins of rock drill bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2342481 CA2342481C (en) | 2001-03-30 | 2001-03-30 | Improved grinding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2342481A1 CA2342481A1 (en) | 2002-09-30 |
| CA2342481C true CA2342481C (en) | 2006-09-12 |
Family
ID=4168732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2342481 Expired - Lifetime CA2342481C (en) | 2000-07-10 | 2001-03-30 | Improved grinding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2342481C (en) |
-
2001
- 2001-03-30 CA CA 2342481 patent/CA2342481C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2342481A1 (en) | 2002-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2001272260B2 (en) | Grinding apparatus with articulated arm | |
| AU2009267763B2 (en) | Manual clamping means for bit holder with quick positioning | |
| AU2014306380B2 (en) | Grinding apparatus with load control | |
| CN1750905B (en) | Grinding apparatus for buttons on rock drill bit | |
| CA2342481C (en) | Improved grinding apparatus | |
| CA2414145C (en) | Grinding apparatus with articulated arm | |
| CA2313685A1 (en) | Grinding apparatus | |
| CA3048079A1 (en) | Improved bit holder for grinding apparatus | |
| CN213053957U (en) | Adjustable drill bit fixing seat | |
| US20220410342A1 (en) | Improved control system for grinding apparatus | |
| WO2006065201A1 (en) | A grinding machine setting arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20210330 |