WO2010146422A1 - Machine d'aiguisage portable pour aiguiser des mèches à bois - Google Patents

Machine d'aiguisage portable pour aiguiser des mèches à bois Download PDF

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Publication number
WO2010146422A1
WO2010146422A1 PCT/IB2010/001134 IB2010001134W WO2010146422A1 WO 2010146422 A1 WO2010146422 A1 WO 2010146422A1 IB 2010001134 W IB2010001134 W IB 2010001134W WO 2010146422 A1 WO2010146422 A1 WO 2010146422A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
sharpening
drill
holes
drill bits
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.)
Ceased
Application number
PCT/IB2010/001134
Other languages
English (en)
Inventor
Nereo Diplotti
Emanuele Pressato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rema Sas Di Pressato Emanuele & C
Nordutensili SRL
Original Assignee
Rema Sas Di Pressato Emanuele & C
Nordutensili SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rema Sas Di Pressato Emanuele & C, Nordutensili SRL filed Critical Rema Sas Di Pressato Emanuele & C
Priority to EP10730505A priority Critical patent/EP2429761A1/fr
Priority to CN201080021385XA priority patent/CN102481677A/zh
Publication of WO2010146422A1 publication Critical patent/WO2010146422A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • 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
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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

Definitions

  • the present invention refers to a portable sharpening machine that is particularly adapted to sharpen wood drill bits, which is fitted out in a simplified manner so as to be used by personnel with no special training.
  • the machine is compact and not cumbersome, which means it can be easily transported and subsequently used in coordination with specific machine tools of the sector, and it can be used statically on a workbench or mobile on a suitable trolley.
  • the machine is provided with equipment adapted to simplify the work of the sharpening personnel, in particular for sharpening wood drill bits with two cutting edges, both for dead holes and of the type for through holes. It also allows the drill bit to be sharpened to be positioned in a special alignment apparatus, which involves fixing a special stem that is adapted to move such drill bit correctly and subsequently on the specific pre-positioned sharpening stations, without requiring the operator to have specific technical knowledge.
  • the machine is provided with various sharpening stations and it is capable of sharpening the two horizontal cutting edges and also the side cutting edges of the drill bits and/or the inclined surfaces of drill bits used to make through holes.
  • Such sharpening machines have various different types of grindstone for the various different types of sharpening to be performed, and in addition the grindstones of such machines cannot be moved along an axis but instead rotate, fixed in position, which means that with wear and tear it is necessary to correctly reposition the slides of the apparatuses that support the utensils to be sharpened.
  • the aim of the invention is to overcome the drawbacks found in making sharpening machines particularly for drill bits in general and specifically for drill bits for wood, by devising a simplified sharpening machine that is easy to use even for personnel without special training, and which has the following principal characteristics:
  • the machine comprises a closed body that has at least two vertical surfaces, of which one is a principal surface from the central area of which a profiled grindstone wheelhead rotating axis with adjustable longitudinal movement protrudes, and it allows the fixing of two drill bit holder supports which have angulations that are different from such axis of rotation, for sharpening drill bits for dead holes; and a secondary surface to which is fixed the device for correctly aligning the drill bit.
  • the sharpening machine has a short lower horizontal plane, on which it is possible to fix a sliding guide in a position that is perpendicular to the axis of the grindstone, for fixing equipment for holding a drill bit or other utensil, at an angle to the axis of rotation of the grindstone.
  • This particular apparatus is used for sharpening drill bits for through holes and/or for dressing the grindstone itself by means of devices adapted to the task.
  • the machine has a suitable closing guard for protection and safety.
  • the device for aligning the drill bits before the sharpening phase since it equips such drill bits with a special stem with a concentric location hole.
  • Such stem is positioned vertically on the secondary surface of the machine.
  • the drill bit to be sharpened is inserted vertically into the special upper hole of the alignment device, placing the two cutting edges of the drill bit against the lower reference shape that is located inside the device and which is clearly visible from outside. In this way the drill bit is correctly positioned at an angle, until it reaches the point where the cutting edges and the base shape fit exactly together.
  • Such device for correctly aligning the drill bits also allows both left- handed and right-handed drill bits to be centered, with simple movements of the base locators with a special button or lever situated at the base of such device.
  • drill bits of varying diameters it is possible to interchange the corresponding centering bushings on the part where the alignment device is inserted.
  • the portable sharpening machine is provided with suitable support apparatuses for sharpening drill bits adapted for dead holes and for through holes. Since these two types of drill bit are different from each other, they will require the use of different support apparatuses. There are two apparatuses for drill bits for dead holes and they are fixed to the principal vertical surface of the machine with suitable reference pins and tightening screws. There are two types, because there are two different types of cutting edge. They are fixed with preset angles of inclination to the grindstone: in this way one apparatus will be used for sharpening the upper rake of the two cutting edges and the other for sharpening the reference mark and the lateral trimmer.
  • the operator Since these drill bits have two cutting edges, the operator has to insert the drill bit a first time in such a way as to make one hole of the drill bit holder mask engage with a reference pin located on the front surface of the first apparatus, and a second time, with the drill bit rotated through 180°, in such a way as to make the second hole of the drill bit holder mask engage with such reference pin.
  • the second sharpening apparatus will be used for sharpening the reference mark and the lateral trimmers and will be used in a similar manner to the foregoing. It is evident that the operator does not have to be an expert in sharpening, it being sufficient to use the mask provided on the drill bit stem to correctly arrange the drill bit on the sharpening apparatus. In the same way drill bits with opposing cutting edges, i.e. left-handed bits, will be sharpened: in this case all that is needed is to rotate the reference guide of such apparatuses.
  • the portable sharpening machine is also able to sharpen wood drill bits for through holes, both left-handed and right- handed.
  • another apparatus will be used, which is fixed to the guides that are perpendicular to the grindstone situated on the base plane of the machine with the same procedure described immediately above.
  • the angle of inclination with respect to the grindstone is provided to be fixed, in order to simplify the work of the operator.
  • One cutting edge is sharpened at a time by inserting the drill bit with the alignment mask into the apparatus and performing the first sharpening by sliding the slide and then the second sharpening after rotating such drill bit through 180°, again making the fixed reference pin of the apparatus engage with the 180° holes of the drill bit holder mask.
  • For sharpening left-hand drill bits all that is needed is to replace the drill bit holder slide.
  • the portable sharpener includes the use of an apparatus that can be dismounted from and remounted onto the horizontal guide of the plane for dressing the grindstone when it is worn.
  • Such apparatus will be provided with a spring-loaded piston that will allow the correct position for dressing the grindstones, and the increase in the spread of the dressing will be managed by an adjustment slide by means of locking a safety screw.
  • the objectives of the present invention are achieved by devising a machine for sharpening wood drill bits, for dead holes and/or through holes, that is compact, portable, and not cumbersome, which can be used on a fixed bench or on a mobile trolley, and which is easy to use even for non-specialist personnel.
  • FIG. 1 shows, in a perspective view, the portable sharpening machine equipped with the two assemblies for sharpening the cutting edges for wood drill bits for dead holes, highlighting the device for aligning the drill bits;
  • FIG. 2 shows, in a perspective view, the same portable sharpening machine but equipped with the wood drill bit holder assembly for sharpening drill bits for through holes;
  • FIG. 3 shows, in a partial side view, a wood drill bit for dead holes
  • Fig. 4 shows, in a partial side view, a wood drill bit for through holes with cutting edges at the end;
  • Fig. 5 shows, in a partial side view, a wood drill bit for through holes with two inclined cutting edges
  • FIG. 6 shows, in a front elevation view, the device for pre-aligning the bits to be sharpened
  • FIG. 7 shows, in a side elevation view, the same device as the previous figure but highlighting the upper centering pin for the drill bit holder assembly, the drill bit support base and the lever for orienting right-hand and left-hand drill bits;
  • Fig. 8 shows, in a plan view, the same device as the two previous figures but highlighting the centering pin for the drill bit holder, which is concentric with the insertion hole of the drill bit to be oriented and of the drill bit stem;
  • Fig. 9 shows, in a partial sectional view from the front, the drill bit alignment device, highlighting the top of the drill bit in the seat of correct support and the drill bit holder engaged with the upper concentric pin;
  • FIG. 10 shows, in a perspective view of an enlarged section, the area of contact of the end of the drill bit with the base locators
  • FIG. 11 shows, in an enlarged perspective view, the same area of the previous figure but highlighting the cutting edges of a drill bit for dead holes in position against the reference base and locator;
  • FIG. 12 shows, in a side elevation view, the portable sharpening machine equipped with the two assemblies for sharpening drill bits for dead holes;
  • FIG. 13 shows, in a front elevation view, the same machine of the previous figure but highlighting the two sharpening assemblies in different orientations with respect to the grindstone, each for sharpening different cutting surfaces;
  • - Fig. 14 shows, in a plan view, the same machine as the two previous figures but highlighting the two drill bits with the respective stems on the respective drill bit holders;
  • FIG. 15 shows, in an enlarged plan view, the sharpening zone of the two drill bits
  • - Fig. 16 shows, in a side elevation view, the portable sharpening machine with the assembly for sharpening drill bits for through holes
  • - Fig. 17 shows, in a front elevation view, the machine in the previous figure but highlighting the apparatus on horizontal sliding guides on the base plane of the machine;
  • - Fig. 18 shows, in a plan view, the sharpening machine in the two previous figures but highlighting the orientation of the drill bit with respect to the grindstone;
  • FIG. 19 shows, in an enlarged plan view, the sharpening zone for a drill bit for through holes
  • - Fig. 20 shows, in a plan view, the portable sharpening machine equipped with the grindstone dressing device, with adjustable movements;
  • FIG. 21 shows, in an enlarged plan view, the area of contact between the dressing grindstone and the grindstone itself.
  • the portable sharpening machine (1) for wood drill bits particularly for dead holes (9) (9.1) and through holes (9.2), is shown with various apparatuses mounted and adapted to sharpen various cutting edges of such drill bits. It is not cumbersome and it can be easily transported by hand by means of the two side handles (2), and it can be placed and operated on a normal fixed bench or on a mobile trolley. It is obviously shielded with suitable safety means for the operator according to current applicable legislation.
  • the sharpener consists of a horizontal base plane on which it is possible to fix sliding guides (4) for the appropriate apparatus (8).
  • the body of the machine rises vertically from such base plane with two surfaces, one principal and one secondary. From the principal surface, the grindstone wheelhead rotating shaft (3) (3.1) protrudes horizontally, in the centre of and perpendicular to such surface.
  • the grindstone shaft can be moved longitudinally with suitable adjustment.
  • the drill bit alignment device (5) mounted on the secondary surface, which is smaller and located beside the principal surface, is the drill bit alignment device (5) which serves to simplify the work of the operator and to facilitate the insertion of a tool holder (16) into the drill bit stem, such tool holder (16) subsequently being used to correctly position the drill bit in the various and subsequent phases of sharpening in the various stations.
  • the drill bit alignment device (5) comprises a vertical structure, into which the wood drill bit (9)(9.1)(9.2) is inserted vertically from above and is. positioned through the central hole (10) by making the cutting edges on its end engage against the base shape (13)(14) and the lower lateral locator (15).
  • Such latter lower lateral locator can be modified, with a special mechanical system operated by lever or by command button (11) according to whether the cutting edges of the drill bit are right-handed or left-handed.
  • a vertical reference pin (12) which is eccentric with respect to the insertion hole (10).
  • Such pin will be engaged by the drill bit holder (16) which will be locked to the stem at the moment of the exact radial orientation of the cutting edges with respect to the lower reference locator (15).
  • Such drill bit holder (16) is provided with two holes (17) for engaging pins (12), such holes (17) being located at 180° with respect to such drill bit holder's central axis, since there are two cutting edges on the drill bit which are positioned 180° from each other and so also are the holes (17) similarly positioned on the drill bit holder, while on the apparatuses there will be one pin only (12) which will be used singly for each reference hole, one at a time. In this way all that is needed is to correctly insert the drill bit into the single apparatus twice to perform a perfect sharpening by executing a correct angulation of the rake angle of the utensil.
  • the portable sharpening machine (1) is provided with various apparatuses (6) and (7) and corresponding grindstone (3) for sharpening drill bits for dead holes (9) and (9.1), and an apparatus (8) with corresponding grindstone (3.1) for sharpening drill bits for through holes (9.2), and lastly the adjustable grindstone dressing assembly (19). All the apparatuses can be dismounted so as to be able to equip the machine for the specific sharpening operations each time as they are needed.
  • each apparatus for sharpening (6)(7)(8) is provided with a hole for inserting the drill bit and the drill bit holder, and with a centering pin (12) which is perpendicular to the support surface of the drill bit holder (16): in this way the drill bit (9)(9.1)(9.2) arrives at the correct angular positions with respect to the corresponding grindstone (3)(3.1) only when the pin (12) engages with one of the two 180° holes (17) of the drill bit holder at a time.
  • the operator does not have to radially orientate the drill bit on the grindstone, but instead simply inserts the drill bit holder into the provided apparatus, taking care to engage the reference pin (12) with a reference hole (17) of the drill bit holder (16), alternately one at a time: in this way the sharpening of the two cutting edges of the drill bit is performed correctly.
  • a first apparatus is comprised of two individual assemblies (6) and (7) which are positioned on the principal vertical surface of the machine and which are incident to the central grindstone (3). There are two apparatuses because they execute separate sharpening operations: one of these is upon the front cutting edge with specific rake angle, and the other simultaneously sharpens a part of the reference mark and of the lateral face of the wood drill bit for dead holes (9)(9.1).
  • a second apparatus (8) is provided by the present invention for sharpening wood drill bits for through holes (9.2). It is mounted on special horizontal guides (4) on the base plane of the machine.
  • the grindstone (3.1) has a different shape to the previous one, because the surface of the drill bit to be sharpened is external only and it is inclined in a specific manner.
  • This drill bit also has two cutting edges and two external surfaces to be sharpened, and hence it is sufficient to have a single apparatus (8) which performs the sharpening of one cutting edge at a time, again with the same operating method described previously.
  • a third apparatus (19) is provided for maintaining the machine and in particular for dressing the grindstone (3) and/or (3.1) when it becomes worn owing to use in sharpening. Such apparatus is fixed to the base plane of the machine with appropriate angulation with respect to the grindstone, and is provided with an adjustment screw (20) to correctly operate with the grindstone dressing tool (18).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

L'invention porte sur une machine d'aiguisage portable (1) pour aiguiser des mèches à bois (9,9.1,9.2), laquelle machine comporte des poignées latérales (2) pour faciliter son transport. Ladite machine (1) comporte différents appareils (5,6,7,8) pour aligner les mèches (9,9.1,9.2), lesquelles peuvent être démontées, remontées et sont interchangeables. Les mèches (9,9.1,9.2) sont disposées au préalable dans la tige de porte-mèches (16) spéciaux, qui peuvent être réutilisés dans les différents postes d'aiguisage et d'alignement. La machine d'aiguisage portable (1) présente, sur une surface latérale, un appareil (5) d'alignement préliminaire de mèche (5), disposé verticalement par rapport au porte-mèche (16). Les mèches (9,9.1,9.2) et les porte-mèches (16) sont alignés sur les appareils (5,6,7,8) à l'aide de broches de référence (12) situées sur les appareils (5,6,7,8) et des trous correspondants (17) situés sur les porte-mèches (16).
PCT/IB2010/001134 2009-05-15 2010-05-17 Machine d'aiguisage portable pour aiguiser des mèches à bois Ceased WO2010146422A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10730505A EP2429761A1 (fr) 2009-05-15 2010-05-17 Machine d'aiguisage portable pour aiguiser des mèches à bois
CN201080021385XA CN102481677A (zh) 2009-05-15 2010-05-17 用于修磨木钻头的便携式修磨机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD2009A000095A IT1396809B1 (it) 2009-05-15 2009-05-15 Macchina affilatrice portatile per affilare punte da legno
ITUD2009A000095 2009-05-15

Publications (1)

Publication Number Publication Date
WO2010146422A1 true WO2010146422A1 (fr) 2010-12-23

Family

ID=41478603

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/001134 Ceased WO2010146422A1 (fr) 2009-05-15 2010-05-17 Machine d'aiguisage portable pour aiguiser des mèches à bois

Country Status (4)

Country Link
EP (1) EP2429761A1 (fr)
CN (1) CN102481677A (fr)
IT (1) IT1396809B1 (fr)
WO (1) WO2010146422A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201511886A (zh) * 2013-09-16 2015-04-01 Eastern Motion Co Ltd 修砂輪機械構造及其方法
KR101701643B1 (ko) * 2015-10-21 2017-02-13 백윤근 타악기 표면 마감장치

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1020523A (fr) * 1950-06-19 1953-02-06 Gabarit porte-outil pour affûter les mèches hélicoïdales sur tous types de tourets à meuler
US4016680A (en) * 1974-04-01 1977-04-12 The Black And Decker Manufacturing Company Sharpener for twist drills including grinding wheel dressing means
US5400546A (en) * 1993-03-19 1995-03-28 Darex Corporation Precision twist drill sharpener/point splitting machine
WO1998001259A2 (fr) * 1996-07-05 1998-01-15 Darex Corporation Machine de precision a affûter des forets et ensemble meule pour cette derniere
DE202005005859U1 (de) * 2005-04-12 2005-07-07 Taiwan More-Cash Villager Corp., Ta-Li Schleifmaschine mit Doppelschleifscheiben zum Schleifen eines Bohrkopfes
US20070243801A1 (en) * 2006-04-18 2007-10-18 Ming-Ko Liao Double-grinding-wheel type drill bit grinding device with a single driving shaft and grinding method thereof
EP2006052A1 (fr) * 2007-06-21 2008-12-24 Taiwan More-Cash Villager Corp. Machine de meulage au disque émeri avec porte-foret ajustable
US7473163B1 (en) * 2007-10-04 2009-01-06 Wang-Sheng Lee Cutter grinding device

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Publication number Priority date Publication date Assignee Title
CH302991A (de) * 1950-12-13 1954-11-15 Gack Ludwig Verfahren und Vorrichtung zum Schleifen von Bohrern bis zu einem Durchmesser von 3 mm.
US3930342A (en) * 1974-04-01 1976-01-06 The Black And Decker Manufacturing Company Sharpener for twist drills
SE462901B (sv) * 1988-10-17 1990-09-17 Constr Mining Equip Cme Anordning foer slipning av stiften paa borrkronor
CN2131649Y (zh) * 1992-03-27 1993-05-05 孟令忠 手持式多功能电动工具
WO2002004169A2 (fr) * 2000-07-10 2002-01-17 C.M.E. Blasting & Mining Equipment Ltd. Améliorations apportées à une machine à meuler
CA2419214A1 (fr) * 2003-02-19 2004-08-19 C.M.E. Blasting & Mining Equipment Ltd. Appareil de meulage des pastilles d'outil de forage
US7121932B2 (en) * 2004-07-06 2006-10-17 Ming-Ko Liao Portable drill sharpener
US7488238B2 (en) * 2007-06-12 2009-02-10 Taiwan More-Cash Villager Corp. Emery wheel grinding machine with adjustable drill bit chuck

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1020523A (fr) * 1950-06-19 1953-02-06 Gabarit porte-outil pour affûter les mèches hélicoïdales sur tous types de tourets à meuler
US4016680A (en) * 1974-04-01 1977-04-12 The Black And Decker Manufacturing Company Sharpener for twist drills including grinding wheel dressing means
US5400546A (en) * 1993-03-19 1995-03-28 Darex Corporation Precision twist drill sharpener/point splitting machine
WO1998001259A2 (fr) * 1996-07-05 1998-01-15 Darex Corporation Machine de precision a affûter des forets et ensemble meule pour cette derniere
DE202005005859U1 (de) * 2005-04-12 2005-07-07 Taiwan More-Cash Villager Corp., Ta-Li Schleifmaschine mit Doppelschleifscheiben zum Schleifen eines Bohrkopfes
US20070243801A1 (en) * 2006-04-18 2007-10-18 Ming-Ko Liao Double-grinding-wheel type drill bit grinding device with a single driving shaft and grinding method thereof
EP2006052A1 (fr) * 2007-06-21 2008-12-24 Taiwan More-Cash Villager Corp. Machine de meulage au disque émeri avec porte-foret ajustable
US7473163B1 (en) * 2007-10-04 2009-01-06 Wang-Sheng Lee Cutter grinding device

Also Published As

Publication number Publication date
ITUD20090095A1 (it) 2010-11-16
CN102481677A (zh) 2012-05-30
EP2429761A1 (fr) 2012-03-21
IT1396809B1 (it) 2012-12-14

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