EP2006052B1 - Emery wheel grinding machine with adjustable drill bit chuck - Google Patents
Emery wheel grinding machine with adjustable drill bit chuck Download PDFInfo
- Publication number
- EP2006052B1 EP2006052B1 EP20070110744 EP07110744A EP2006052B1 EP 2006052 B1 EP2006052 B1 EP 2006052B1 EP 20070110744 EP20070110744 EP 20070110744 EP 07110744 A EP07110744 A EP 07110744A EP 2006052 B1 EP2006052 B1 EP 2006052B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill bit
- bushing
- emery wheel
- chuck
- grinding 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.)
- Active
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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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/066—Work supports, e.g. adjustable steadies adapted for supporting work in the form of tools, e.g. drills
-
- 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
- B24B3/247—Supports for drills
Definitions
- the present invention relates to emery wheel grinding machine with an adjustable chuck, and more particularly, to an emery wheel grinding machine equipped with an adjustable drill bit chuck suitable for shaving the drill bit or a cutter of a two or more faced and variously lengthed blade of a hobbing cutter other than a single blade one, as per the preamble of claim 1.
- An example of such a machine is disclosed by US 6 652 367 B.
- a conventional portable grinding machine as it was disclosed and published by Taiwan Pat. No. 286610 , 155338 , is composed of a housing, a cap covered at one end thereof, a transmission gearing equipped in the housing, a emery wheel and guiding members.
- the whole unit is set on an electric motor with the grinding machine coupled with the main shaft of the electrical drill so as to impart the rotational power of the electrical drill to the emery wheel with transmission gearing for running.
- a drill bit or cutter to be shaved is affixed to the machine unit with the guiding members so as to shave and grind the drill bit or cutter blade to a desired extent.
- the grinding or shaving effect can only reach to the very small part surrounding the central pointed drill head without reaching further to the portion of the blade edge at the recessed clearance, that greatly degrades the effect of finishing drill bit.
- this newly developed apparatus is essentially composed of an emery wheel 20 driven by a power source associated with a work fixture and a drill bit fixing means 30 for operation.
- the work fixture is cooperated with a first grinding base 40 for the purpose of affixing the blade of the drill bit in such a manner that its clearance angle is closely fitted to the tilted grinding surface 21 of the emery wheel 20.
- the work fixture is cooperated with a second grinding base 50 for the purpose of affixing the blade of the drill bit in such a manner that its spiral angle to be closely fitted to the tilted grinding surface 21 of the emery wheel 20.
- the drill bit fixing means 30 comprises a work fixture fastening base 31 for setting the work fixture, and a drill bit fastening jig 32.
- the work fixture fastening base 31 is provided with a mounting hole that allows the work fixture to be engaged in, and a rotation limiting post with a prescribed angle provided at the circumference of the mounting hole.
- the first grinding base 40 is engaged to a machine housing 10 in front of the emery wheel 20 aligned in the same center line, and is kept a distance with the emery wheel 20 equal to that between the work fixture fastening base 31 and the drill bit fastening jig 32.
- the first grinding base 40 is approximately configured in L shape with an arcuate sliding slot 41 formed at the base surface thereof. By fastening the arcuate sliding slot 41 with a bolt 42, the first grinding base 40 can practically keep a relevant angle with the emery wheel 20 so as to grind and shave a variety of drills such as standard drill, rugged drill, or ebonite drill having the blades of different clearance angles and recesses.
- the first grinding base 40 has a vertical wall 46 on which being provided with a mounting hole 43 for engaging the work fixture therein, and two rotation limiting posts 44, 45 with a prescribed angle and distance are formed at the circumference of the mounting hole 43.
- the mounting hole 43 is upwardly inclined with an angle about 10 ⁇ 25° in order to fit the direction of the blade of the drill bit to be shaved.
- the second grinding base 50 is engaged to the machine housing 10 with a bolt 51 above the emery wheel 20 keeping a distance with the latter equal to that between the work fixture fastening base 31 and the drill bit fastening jig 32.
- the second grinding base 50 has a mounting hole 52 for engaging the work fixture therein and a rotation limiting post 53 with a prescribed angle standing on the circumference of the mounting hole 52.
- the present invention is to provide an emery wheel grinding machine, as per claim 1, with adjustable bit chuck which has a tilted T-bushing, and its outer flange is provided with several stop traps with the number corresponding to that of the blades of a hobbing cutter to be shaved. On the outer flange of the T-bushing is also provided with two stop pins for defining the turning angle of the head of the hobbing cutter.
- the tilted T-bushing of the present invention is not only able to adjust the chuck angle according to the figure and number of blades of the hobbing cutter, but also can control the turning angle of the hobbing cutter with the stop pins so that the clearance angles and the recesses between the blades can be effectively shaved.
- the adjustable drill bit chuck of the present invention which accommodate a grinder 100, is provided with a first drill chuck 100A and a second drill chuck 100B.
- the former has a containment hole 101
- the latter has a T-bushing 200 with a containment hole 102 respectively.
- One end 201 of the T-bushing 200 can be inserted into the containment hole 101, while the other end has a larger outer diameter such that an outer flange 202 is emerged out of the containment hole 101 after insertion.
- Two, three, or four pairs of stop traps 203 are provided along the circumference of the outer flange 202 according to the number of blades of the drill or hobbing cutter to be shaved.
- the stop traps 203 can be engaged with corresponding clamp studs 103 which are provided on the outer surface of the drill chuck so as to hold the T-bushing 200 in place in the containment hole 101 of the drill chuck.
- the T-bushing 200 has a tapered hole 204 in it with a taper angle such that the blade of the drill or hobbing cutter can keep a prescribed inclination angle with the emery wheel when the drill or cutter head is inserted into the tapered hole 204.
- the adjustable drill chuck is provided with two pairs of stop pins 301, 302 along the outer flange 202 of the T-bushing 200 so as to control the turning angle of the drill bit chuck.
- the confinement grooves 401, 402 and the stop pins 301, 302 cooperate to control the turning angle of the chuck head 400 by their mutual positional relation thereby defining the length of the cutter blade to be shaved.
- the T-bushing 200 of the adjustable chuck is not only for holding a hobbing cutter 500 to be shaved by exposing a blade length 501, but also can serve in the second drill chuck 100B to finish the clearance angles 502 or recesses 503 of the cutter blades.
- a tilted T type emery wheel 600 is used in the present invention, it is provided an outer ring 601 with larger diameter than that of the main wheel 600 at one side thereof, the grinding surface of the outer ring 601 is covered with a preferably thick emery compounds.
- the chuck head 400 holding the hobbing cutter 500 at the chuck side is inserted into the tapered hole 204 in the T-bushing 200 so as to bring the hobbing cutter 500 in contact with the main body of the emery wheel 600 with a tilted angle ⁇ .
- the hobbing cutter 500 can be settled to shave its blade.
- the hobbing cutter 500 is in contact with the main body of the emery wheel 600 with a tilted angle ⁇ , the tilted blade can be easily shaved.
- the blades 504, 505 with different length can be effectively shaved by turning the chuck head from 0° to 180°.
- a clearance angle ⁇ 1 of the hobbing cutter 500 is to be shaved, at first the T-bushing 200 is inserted into the Y direction containment hole 101 of the second bit chuck 100B, and then by inserting the chuck head 400 which holds the hobbing cutter 500 into the tapered hole 204 of the T-bushing 200 such that the hobbing cutter 500 is in contact with the outer ring 601 of the emery wheel 600 with a tilted angle ⁇ thereby making the cutter 500 to incline a certain angle against the edge 602 of the outer ring 601.
- the clearance angle of the blade of the cutter 500 can be easily shaved.
- the present invention can be applied to shave and finish the hobbing cutter 500 with two, three or even four blades conveniently and easily only by turning the T-bushing 200.
Description
- The present invention relates to emery wheel grinding machine with an adjustable chuck, and more particularly, to an emery wheel grinding machine equipped with an adjustable drill bit chuck suitable for shaving the drill bit or a cutter of a two or more faced and variously lengthed blade of a hobbing cutter other than a single blade one, as per the preamble of
claim 1. An example of such a machine is disclosed byUS 6 652 367 B. - A conventional portable grinding machine, as it was disclosed and published by Taiwan Pat. No.
286610 155338 - With the grinding machine described above, the grinding or shaving effect can only reach to the very small part surrounding the central pointed drill head without reaching further to the portion of the blade edge at the recessed clearance, that greatly degrades the effect of finishing drill bit.
- For an improvement, the applicator invented an innovative Portable Drill Bit Grinding Machine which was patented by Taiwan Pat. No.
547228 Fig. 1 , this newly developed apparatus is essentially composed of anemery wheel 20 driven by a power source associated with a work fixture and a drill bit fixing means 30 for operation. The work fixture is cooperated with afirst grinding base 40 for the purpose of affixing the blade of the drill bit in such a manner that its clearance angle is closely fitted to the tilted grinding surface 21 of theemery wheel 20. Then, the work fixture is cooperated with asecond grinding base 50 for the purpose of affixing the blade of the drill bit in such a manner that its spiral angle to be closely fitted to the tilted grinding surface 21 of theemery wheel 20. - As shown in
Fig. 1 , the drill bit fixing means 30 comprises a workfixture fastening base 31 for setting the work fixture, and a drillbit fastening jig 32. The workfixture fastening base 31 is provided with a mounting hole that allows the work fixture to be engaged in, and a rotation limiting post with a prescribed angle provided at the circumference of the mounting hole. - The
first grinding base 40 is engaged to amachine housing 10 in front of theemery wheel 20 aligned in the same center line, and is kept a distance with theemery wheel 20 equal to that between the workfixture fastening base 31 and the drillbit fastening jig 32. Thefirst grinding base 40 is approximately configured in L shape with an arcuate slidingslot 41 formed at the base surface thereof. By fastening the arcuate slidingslot 41 with abolt 42, thefirst grinding base 40 can practically keep a relevant angle with theemery wheel 20 so as to grind and shave a variety of drills such as standard drill, rugged drill, or ebonite drill having the blades of different clearance angles and recesses. - The
first grinding base 40 has avertical wall 46 on which being provided with amounting hole 43 for engaging the work fixture therein, and tworotation limiting posts mounting hole 43. Themounting hole 43 is upwardly inclined with an angle about 10 ~ 25° in order to fit the direction of the blade of the drill bit to be shaved. - The
second grinding base 50 is engaged to themachine housing 10 with abolt 51 above theemery wheel 20 keeping a distance with the latter equal to that between the workfixture fastening base 31 and the drillbit fastening jig 32. Thesecond grinding base 50 has amounting hole 52 for engaging the work fixture therein and arotation limiting post 53 with a prescribed angle standing on the circumference of themounting hole 52. - However, the improved portable grinding machine patented by No.
547,228 - For these defects noticeable on the prior art, further improvement is seriously required. The inventor has dedicated great efforts for years to studying and improving these defects and came up with the present invention to be disclosed herein.
- The present invention is to provide an emery wheel grinding machine, as per
claim 1, with adjustable bit chuck which has a tilted T-bushing, and its outer flange is provided with several stop traps with the number corresponding to that of the blades of a hobbing cutter to be shaved. On the outer flange of the T-bushing is also provided with two stop pins for defining the turning angle of the head of the hobbing cutter. - The tilted T-bushing of the present invention is not only able to adjust the chuck angle according to the figure and number of blades of the hobbing cutter, but also can control the turning angle of the hobbing cutter with the stop pins so that the clearance angles and the recesses between the blades can be effectively shaved.
- The above object and other advantages of the present invention will become more apparent by describing in detail the preferred embodiments of the present invention with reference to the attached drawings.
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FIG. 1 is the three dimensional view of The Portable Drill Bit Grinding Machine Patented by Taiwan Pat. No.547,228 -
FIG. 2 is the three dimensional view of the present invention; -
FIG. 3 is the three dimensional view of the T-bushing, chuck head and chuck according to the present invention; -
FIG. 4 is the sectional view of the T-bushing according to the present invention; -
FIG. 5 is the three dimensional view of a hobbing cutter; -
FIG. 6 is a three dimensional view of the emery wheel with an outer annular ring according to the present invention; -
Fig. 7 is a schematic view of a hobbing cutter whose blades are to be shaved; -
Fig. 8 is a schematic view of another example other than that shown inFig. 7 ; -
Fig. 9 is a schematic view showing the clearance angle of a hobbing cutter which is under shaving. - Referring to
Fig. 2 andFig. 3 , the adjustable drill bit chuck of the present invention which accommodate agrinder 100, is provided with afirst drill chuck 100A and asecond drill chuck 100B. The former has acontainment hole 101, and the latter has a T-bushing 200 with acontainment hole 102 respectively. Oneend 201 of the T-bushing 200 can be inserted into thecontainment hole 101, while the other end has a larger outer diameter such that anouter flange 202 is emerged out of thecontainment hole 101 after insertion. Two, three, or four pairs ofstop traps 203 are provided along the circumference of theouter flange 202 according to the number of blades of the drill or hobbing cutter to be shaved. Thestop traps 203 can be engaged withcorresponding clamp studs 103 which are provided on the outer surface of the drill chuck so as to hold the T-bushing 200 in place in thecontainment hole 101 of the drill chuck. - Referring to
Fig. 4 , the T-bushing 200 has atapered hole 204 in it with a taper angle such that the blade of the drill or hobbing cutter can keep a prescribed inclination angle with the emery wheel when the drill or cutter head is inserted into thetapered hole 204. - Returning to
Fig. 3 , in the present invention, the adjustable drill chuck is provided with two pairs ofstop pins outer flange 202 of the T-bushing 200 so as to control the turning angle of the drill bit chuck. As shown inFig. 3 , after inserting the adjustable check head havingconfinement grooves tapered hole 204, theconfinement grooves stop pins chuck head 400 by their mutual positional relation thereby defining the length of the cutter blade to be shaved. - Referring to
Fig. 5 , in the present invention, the T-bushing 200 of the adjustable chuck is not only for holding ahobbing cutter 500 to be shaved by exposing ablade length 501, but also can serve in thesecond drill chuck 100B to finish theclearance angles 502 orrecesses 503 of the cutter blades. - Referring to
Fig. 6 , if a tilted Ttype emery wheel 600 is used in the present invention, it is provided anouter ring 601 with larger diameter than that of themain wheel 600 at one side thereof, the grinding surface of theouter ring 601 is covered with a preferably thick emery compounds. - Referring to
FIG. 7 , when the blades of ahobbing cutter 500 is to be shaved, at first the T-bushing 200 is inserted into the Zdirection containment hole 101 of the firstdrill bit chuck 100A, then thechuck head 400 holding thehobbing cutter 500 at the chuck side is inserted into thetapered hole 204 in the T-bushing 200 so as to bring thehobbing cutter 500 in contact with the main body of theemery wheel 600 with a tilted angle θ. As theemery wheel 600 rotates, by turning thechuck head 400 according to the mutual positional relation between theconfinement grooves stop pins hobbing cutter 500 can be settled to shave its blade. Taking the cutter with two-faced blade for example, as soon as one side of the blade is finished, turning the T-bushing 200 180° and inserting it into the Zdirection containment hole 101 of the firstdrill bit chuck 100A so as to continue shaving the other side of the blade. - Since the
hobbing cutter 500 is in contact with the main body of theemery wheel 600 with a tilted angle θ, the tilted blade can be easily shaved. As shown inFig. 8 , by means of incliningcenter 500A of thecutter 500 against thecorner 602 of theemery wheel 600, theblades 504, 505 with different length can be effectively shaved by turning the chuck head from 0° to 180°. - Referring to
Fig. 9 , when a clearance angle θ1 of thehobbing cutter 500 is to be shaved, at first the T-bushing 200 is inserted into the Ydirection containment hole 101 of thesecond bit chuck 100B, and then by inserting thechuck head 400 which holds thehobbing cutter 500 into thetapered hole 204 of the T-bushing 200 such that thehobbing cutter 500 is in contact with theouter ring 601 of theemery wheel 600 with a tilted angle θ thereby making thecutter 500 to incline a certain angle against theedge 602 of theouter ring 601. By so, the clearance angle of the blade of thecutter 500 can be easily shaved. - Accordingly, by utilizing the T-bushing 200 with the
tapered hole 204 together with theemery wheel 600 with theouter ring 601, the present invention can be applied to shave and finish thehobbing cutter 500 with two, three or even four blades conveniently and easily only by turning the T-bushing 200. - Although the present invention has been disclosed and illustrated with respect to preferred embodiments thereof, it is to be understood that the invention is not to be so limited and that other changes and modifications can be made within the full intended scope of the invention as hereinafter claimed.
Claims (4)
- Emery wheel grinding machine (100) with adjustable drill bit chuck (100A) comprising:an emery wheel (600) for grinding and shaving a drill bit; a bushing (200) in said chuck (100A) for insertion of the head of said drill bit;wherein said bushing (200) is a T-shaped bushing having an outer flange (202) one end thereof can be inserted into a containment hole (101), and the other end including the outer flange (202) extends out of said containment hole (101), characterized by said drill bit chuck (100A) including a plurality of clamp studs (103) and said outer flange (202) being provided with several pairs of stop traps (203) along its circumference and can be engaged with said corresponding clamp studs (103) provided on an outer surface of said drill bit chuck (100A), and said T-bushing has a tapered hole (204) in it.
- The grinding machine as in claim 1, wherein the surface of said outer flange (202) of said T-bushing is provided with two pairs of stop pins (301,302) for controlling the turning angle of said drill bit chuck (100A).
- The grinding machine as in claim 1, wherein the number of said stop traps (203) provided along the circumference of said outer flange (202) of said T-bushing is determined according to the number of cutter blades to be shaved.
- The grinding machine as in claim 1, wherein the grinding wheel used in said grinding machine is an emery wheel (600) provided with an outer ring with a larger diameter than that of the main wheel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070110744 EP2006052B1 (en) | 2007-06-21 | 2007-06-21 | Emery wheel grinding machine with adjustable drill bit chuck |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070110744 EP2006052B1 (en) | 2007-06-21 | 2007-06-21 | Emery wheel grinding machine with adjustable drill bit chuck |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2006052A1 EP2006052A1 (en) | 2008-12-24 |
EP2006052B1 true EP2006052B1 (en) | 2014-04-16 |
Family
ID=38626306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070110744 Active EP2006052B1 (en) | 2007-06-21 | 2007-06-21 | Emery wheel grinding machine with adjustable drill bit chuck |
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EP (1) | EP2006052B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110802447A (en) * | 2018-08-06 | 2020-02-18 | 洪逸博 | Bit sharpening machine capable of arbitrarily adjusting dead point size of two-bevel or three-bevel bit |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1396809B1 (en) * | 2009-05-15 | 2012-12-14 | Re Ma Sas Di Pressato Emanuele & C | PORTABLE SHARPENING MACHINE TO AFFILE WOOD TIPS |
ITUD20110078A1 (en) | 2011-06-03 | 2012-12-04 | Nordutensili S R L | "AUTOMATIC SHARPENING MACHINE FOR WOODEN CANDLE MILLS, PROGRAMMABLE WITH OPTICAL READING OF THE GEOMETRIC CHARACTERISTICS AND COMPUTERIZED SHARPENING". |
CN105415176B (en) * | 2014-09-12 | 2017-12-22 | 深圳盟星科技股份有限公司 | A kind of universal chuck |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1020523A (en) * | 1950-06-19 | 1953-02-06 | Tool holder jig for sharpening helical bits on all types of bench grinders | |
US2958167A (en) * | 1958-05-09 | 1960-11-01 | Seth Silverman | Grinder fixture |
US3039244A (en) * | 1961-03-06 | 1962-06-19 | Wynn S Vickerman | Tool grinding fixture |
TW538849U (en) * | 2002-05-21 | 2003-06-21 | Jen-Fu Lin | Grinding device for drill bit |
-
2007
- 2007-06-21 EP EP20070110744 patent/EP2006052B1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110802447A (en) * | 2018-08-06 | 2020-02-18 | 洪逸博 | Bit sharpening machine capable of arbitrarily adjusting dead point size of two-bevel or three-bevel bit |
Also Published As
Publication number | Publication date |
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EP2006052A1 (en) | 2008-12-24 |
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