Line Card. Lisle drill grinder

08.05.2023 Beanrad card, drill, line, lisle, гриндер

US2401471A. Drill grinder. Google Patents

Publication number US2401471A US2401471A US521375A US52137544A US2401471A US 2401471 A US2401471 A US 2401471A US 521375 A US521375 A US 521375A US 52137544 A US52137544 A US 52137544A US 2401471 A US2401471 A US 2401471A Authority US United States Prior art keywords trough drill screw support stop Prior art date 1944-02-07 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 Application number US521375A Inventor Harry E Fendring Original Assignee Harry E Fendring 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.) 1944-02-07 Filing date 1944-02-07 Publication date 1946-06-04 1944-02-07 Application filed by Harry E Fendring filed Critical Harry E Fendring 1944-02-07 Priority to US521375A priority Critical patent/US2401471A/en 1946-06-04 Application granted granted Critical 1946-06-04 Publication of US2401471A publication Critical patent/US2401471A/en 1963-06-04 Anticipated expiration legal-status Critical Status Expired. Lifetime legal-status Critical Current

Images

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
B24B3/247 — Supports for drills

Description

I H. E. FENDRING DR ILL GRINDER Filed Feb. 7, 1944 Patented June 4, 1946 UNITED STATES PATENT OFFICE DRILL GRINDER Harry E. Fendring, Los Angeles, Calif.

My invention relates to a drill grinder, and more particularly to an attachment to conventional grinders, for grinding drills of most common sizes.

An object of this invention is to provide a drill grinder for grinding drills of various diameters and lengths, and also for grinding drills of various pitches, that is, drills having flutes of various spirals.

An important object of this invention is to provide a grinder for sharpening extremely short drills, and one which by a’slight conversion or adjustment may be made to sharpen drills of considerable length.

An important object of this invention also is the provision of means whereby the attachment may be quickly adjusted, with respect to the grinding element, to a fixed position which may have been previously determined, or to a fixed position in compliance with specific directions.

A further important object of this invention is to provide means whereby the clearance of the drill back of the cutting lip is relatively uniform so as to increase the strength and the life of the drill. I

Also an important object of this invention is to provide simple and economically constructed means for angularly adjusting the drill-holding member with respect to the supporting means therefor so that the angular position of the trough may be easily and quickly determined.

With the foregoing objects in view, and others, as will appear hereinafter, I have provided a specific construction of my drill grinder embodying the foregoing objects, as will be described hereinafter, and shown in the accompanying drawing, in which:

Fig. 2 is another elevational view thereof, taken at right angles to that shown in Fig. 1, but from the drill-grinding end of the attachment;

Fig. 3 is a rear end view of the drill-holding member, taken at 3-3 of Fig. 1, a portion being broken away to clarify the illustration.

Fig. 6 is a sectional view thereof in plan, taken through B6 of Fig. 1, showing the base of the pedestal;

Fig. 7 is a fragmentary side view of the drillholding trough, showing how the same may be used as a gauge to determine the approximate angle of the clearance; and

Fig. 8 is a side view of the adjusting screw, but with another adjusting drill stop mounted thereon for use, as shown in the dotted line position in Fig. 1. g

In the drawing, the grinding element which may be a conventional grindstone, is designated W, and the support therefor may be a table,

My attachment is adjustably mounted on the table T. The supporting pedestal, designated I, of the attachment, is provided with an elongated base I which has a slot l This base is adjustably secured to the table T by a bolt 2 extending through the slot I. On the face I and along side the slot I is a graduated scale 3 for determining the position of the drill relative to the grinding wheel W.

At one end of the base of the pedestal l is an upwardly directed ivot pin l, and over this pin is swivelly mounted the cylindrical stem 4 of a support 4. The pivotal axis of the support 4 on the pivot pin of the base is inclined at an angle from the base toward the grinding wheel W, preferably and substantially as shown in Fig. l, for the purpose to be hereinafter described.

At the upper end of the support is a pivot portion 4 on which is carried a V- shaped drillholding trough 5. This drill-holding trough or member is provided with a downwardly extending pivot boss 5 which is positioned against the apex of the drill-holding trough is positioned considerably to one side of, and specifically to the left-hand side of the pivotal axis and of the support 4, as shown best in Fig. 2, also for the purpose to be hereinafter described.

In order to determine and fix the angular position of the trough 5 with respect to the support 4, I have provided a plurality of radial notches 4 in the pivot portion 4, in one of whichis adapted to extend a radial ridge E on the lug 5 At the upper end of the trough, that is, the end nearest the grinding wheel W, is a drill grinding guide lip 1, which consists of a piece of hard plate steel. One edge of the lip is pivotally mounted at its lower end, by a screw 8, at one end of one leg of the trough ‘5, and below the face of said leg. The opposite end of the lip 1 is provided with an arcuate slot ‘1 which is adjustably secured to the outer end of this leg of the trough by a screw 9. This permits the upper edge l of the lip to be raised and lowered, or variously inclined, with respect to the upper face of said leg of the drill-holding trough upon which it is mounted.

The adjustment of the guide lip, as stated, permits the proper sharpening and adjustment of drills of various twists or spirals.

The trough 5 is V-shaped, with the legs or flanges substantially at right angles to each other. The drill to be sharpened is laid. in this trough with the opposite edges of the flute, near the cutting edge, resting on the upper edge 1 of the lip 1. The drill is adjusted within the trough and upon the lip I and relative to the grinding wheel by means of an adjusting stop or feed member In. One end of the stop lies within the trough at right angles to the longitudinal extent or axis thereof, and the other end of the adjustable stop is provided with a threaded boss m through which the adjusting screw H extends. The adjusting stop is carried upon the adjusting screw substantially from one end of the trough to the other. The screw is manually rotated by a knob l I at the lower end thereof. The adjusting stop is locked in position by a lock nut l2 at the upper end of the adjusting stop. The upper end of the adjusting screw is reduced and fits into and is revolubly mounted in lugs 5, while the lower end is mounted in a lug 5 these lugs being positioned at the upper and lower ends of one side of the trough.

The lower end of the screw H is undercut, as indicated by ll in Fig. 8, and this undercut portion fits into a bifurcated portion of the lower supporting lug 5 One side of the undercut portion is flattened, as indicated by W, to permit this portion to be readily snapped into the 1115; 5 and also readily removed therefrom.

If a drill of unusual length is to be sharpened, the screw is removed from the position shown in Figs. 1, 2, 3, and 4, and the upper end thereof, is secured to a lug 5 extending downwardly and spaced from the lower end of the trough. This lug is provided with a hole, which is axially parallel to the apex of the trough, and which consists of a tapped portion 5 and a counterbored portion 5′ for receiving respectively the threaded portion and the reduced portion at the upper end of the screw. In this position the screw extends downwardly beyond the lower end of the drillholding trough, as indicated by dotted lines in Fig. 1.

When the screw is in the last-mentioned position, there is provided an adjustable stop or feed disc l3, which is screwable on the screw, and which may be locked in position by the lock nut !2. When the attachment is used as last described, the adjustable stop ill may remain on the screw.

I have found by experiment that when the plane passing through the apex of the drillholding trough is positioned at one side of the pivotal axis of the support and pedestal, and specifically at the left side as shown, the desired clearance is provided for the end of the drill. Also, when the pivotal axis of the support 4 is 4 inclined toward the grinding wheel, this clearance on the drill is rounded backwardly from the cutting edge, giving a uniform clearance.

In order to determine whether the clearance is approximately proper, the drill may be laid in the trough, as shown in Fig. ‘7. The clearance may then be determined by noting the angle between the lower end 5 of the trough and the peripheral line between the ground end and the side of the drill.

In Fig. 1, I have shown a stop S in the form of a nail, which is adapted to be engaged by a stop portion on the swinging trough to limit the swinging thereof on the pedestal. This stop portion may be the lug 5 at the lower side of the trough.

Though I have disclosed a particular form of my drill grinding attachment, I do not wish to be limited to the same, but desire to include in my invention the drill grinding attachment as set forth in the following claims.

In a drill grinder, a pedestal, a support swivelly mounted on the pedestal, a drill-holding trough carried on the support, an adjusting screw at the side of and parallel to the trough, and an adjustable drill stop mounted on the screw, said adjustable stop extending into and movable in the trough, said trough having means at its opposite ends for revolubly and removably mounting the screw thereon, said trough having also means at the under side thereof for receiving and securing the forward end of the screw so that the screw may extend beyond the lower end of the trough with the axis thereof positioned below and parallel to the apex of the trough.

In a drill grinder, a pedestal, a support swivelly mounted on the pedestal, a drill-holding trough carried on the support, an adjusting screw at the side of and parallel to the trough, and an adjustable drill stop mounted on the screw, said adjustable stop extending into and movable in the trough, said trough having means at its oi posite ends for revolubly and removably mounting the screw thereon, said trough having a downwardly extending lug at its underside and spaced forwardlyfrorn its rear end for receiving and securing the forward end of the screw so that the screw may extend beyond the lower end of the trough with the axis thereof positioned below and parallel to the apex of the trough.

In a drill grinder, a pedestal, a support swivelly mounted on the pedestal, a drill-holding trough carried on the support, an adjusting screw at the side of and parallel to the trough, said trough having means at its opposite ends for revolubly and removably mounting the screw thereon, said trough having also means at the under side thereof for receivin and securing the forward end of the screw so that the screw may extend beyond the lower end of the trough with the axis thereof positioned below and parallel to the apex of the trough, and an adjusting disc on the screw.

Line Card

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A

ALL AMERICAN DRILL BUSHING

ALLEN-HOLOKROME ALLEN BENJAMIN ALLIED MACHINE ENG. CO. ALORIS TOOL CO. ALVORD POLK TOOL CO. AMERICAN ALLSAFE AMERICAN CARBIDE TOOL CO. AMERICAN DRILL BUSHING AMERICAN NATIONAL CARBIDE AMERICAN SAW MFG. APT AQUAFLOW ARMSTRONG TOOLS ASHBURN INDUSTRIES AWARD CUTTER

B

BARCOR BASSETT ROTARY TOOL BAUSCH LOMB BENTZ TOOL BILZ TOOL BISON BLAKE MFG. BLUE DEVIL

BORITE MFG. CO. BOTT/KENNEDY BRIGHTON BEST BROWN SHARPE BRUBAKER TOOL CORP. BRUSH RESEARCH MFG. BTC LATHE CHUCKS BUCK CHUCK CO. BUFFALO PRECISION PROD. BURR KING MFG. CO.

C

CALIFORNIA AIRCRAFT TOOL CALIFORNIA REAMER

CARBIDE GRINDING CARDINAL CUTTING TOOLS CARDINAL SPEED VISE CARMEX PRECISION TOOLS CARR-LANE CASTROL CEDARBERG IND. CEJN INDUSTRIAL CENTAUR PRECISION

CHECKPOINT LASER CHICAGO LATROBE

CLAMP MFG. CLAPP HANEY BRAZED TOOL

CLEVELAND TWIST DRILL

C M TOPLINE COILHOSE PNUEMATIC

CONICAL TOOL CRAFTSMAN INDUSTRIES CRAIG TOOLS CRATEX MFG. CRESCENT

CRITERION MACHINE WORKS

D

DACO JAW DAKE DANAHER TOOL GROUP DAZOR DAREX DE-STA-CO DELTRONIC CORP. DENITOOL DESMOND-STEPHAN CO. DONALD SAVARD CO. DONEGAN OPTICAL DORIAN TOOL DREMEL DUMONT CORP. DUMORE CORP. DURHAM MFG. CO. DYKEM

E

EAGLE ROCK EASTERN SAFETY EQUIPMENT ECONOMY BUSHING CORP. EKLIND TOOL CO. EKSTROM, CARLSON CO. ERICKSON TOOL ERON VISE ETALON

F

F D TOOL CO. FISHER MACHINE CO. FLEXBAR FLORIDA PNEUMATIC MFG. FOREDOM ELECTRIC CO. FORM ROL DIE CORP. FRED V. FOWLER CO. FULLERTON TOOL

G

GEM GENERAL CHIPBREAKER DRILL GENERAL HARDWARE MFG. GEOMETRIC GEORGE WHALLEY CO. GERSTNER SONS GLOBAL CNC GRAYMILLS CORP.

H

HANITA CUTTING TOOLS HANNIBAL CARBIDE TOOL HANSON-WHITNEY CO. HARDINGE BROTHERS, INC. HARVEY TOOL CO. HASSEY SAVAGE CO. HEIMANN MFG. CO. HEINRICH TOOLS, INC. HELI-COIL PRODUCTS HOLOKROME/ALLEN

I

IDEAL THREAD GAGE IMCO CARBIDE INDUSTRIAL PRESS INGERSOLL-RAND INTINTERAPID INDICATORS

INSIZE USA INTERNAL TOOL INTERNATIONAL MINICUT

J

JET EQUIPMENT-WMH GROUP J.F.K. COMPANY J M MACHINE CO.

K

KAFER INDICATORS KAISER TOOL CO.-THINBIT

K.D.K. COMPANY KENNEDY MFG. CO.

L

LAVALLEE IDE COMPANY

LENOX LISLE DRILL GRINDER LISTA LOCKWOOD PRODUCTS LOCTITE CORP. LPS CHEMICAL PRODUCTS LUTZ FILE TOOL CO. LUXO LAMP CORP.

M

M. A. FORD MANCHESTER TOOL CO MATZ RUBBER

MERIT ABRASIVES MESA TOOL

MICRO-100, INC. MICRO-VU CORP. MICROFINISH

MILLSTAR MILWAUKEE MINIATURE THREAD SPEC. MITEE-BITE PRODUCTS MITUTOYO AMERICA M.K. MORSE CO. MOLY-DEE TAPPING FLUID MOON CUTTER CO. MORSE CUTTING TOOLS

N

NACHI NATIONAL DIAMOND LAB. NEWALL PRODUCTS NEWCOMER NIAGARA CUTTER NICHOLSON NIKCOLE, INC. NOBUR MFG. NOGA NOMA NORTH AMERICAN TOOL CO. NUPLA CORP.

O

OMCUT ONSRUD TOOL, CO, OSBORNE CO.

P

PALMGREN TOOL PRODUCTS PEARL ABRASIVE PELICAN PRODUCTS PERMATEX INDUSTRIAL PETROCHEM POHL TOOL CORP. POLY-CUT FLUID PONAM PRECISION GAGES PRATT WHITNEY PRECISION BRAND PROD. PRECISION CUTTING TOOLS PRECISION GRANITE PRECISION MARHSALL STEEL PRECISION TWIST DRILL PROCUNIER PRODUCTS ENGINEERING CO.

R

RADIANS RAM PRODUCTS RECOIL REGAL BELOIT CORP.

RELTON CORP. REPUBLIC DRILL CORP. RITEN ROBB JACK CORP.

ROVI MANUFACTURING ROYAL PRODUCTS RUBBERMAID

S

SARGON SCANDINAVIAN TOOL SYSTEMS SCHERR-TUMICO, INC. SCIENTIFIC CUTTING TOOLS SCOTCH BRITE/3M SCULLY-JONES CORP. SEV-CAL SEVERANCE TOOL, INC.

SHEAR-LOC PRODUCTS SHOP-VAC CORP. SIERRA MOLD ENG.

SIMONDS INTERNATIONAL

Skoda LIVE CENTERS SNAP JAWS MFG. SOWA SPE-D-CUT

STANDRIDGE GRANITE CORP. STANLEY-PROTO

STERLING CARBIDE SUBURBAN TOOL

SUNLAND TOOL SWISS PRECISION INST.-SPI

T

TAP ASSOCIATES-JUNGERE TAPMAGIC TAPMATIC CORP. TECLOCK TECNARA TOOLING SYSTEMS TE-CO TOOLING TESA THEMAC, INC. THINBIT/KAISER TOOL THURSTON MFG. CO.

TOOLMEX TPI INDUSTRIAL TRIANGLE GRINDING CO. TRICO TROYKE MFG. CO. TULON

U

UNIBIT UNITED DRILL BUSHING ULTRA TOOL CO. UVEX

V

VACO PRODUCTS VALCOOL VALENITE

VARGUS TOOL MFG. VERMONT GAGE

W

WALTON COMPANY WATERLOO WD-40 COMPANY WEILER BRUSH WELDON TOOL WESCO TOOL, INC. WESTERN ABRASIVES WESTERN TAP MFG. CO. WHITNEY TOOL WIDELL INDUSTRIES WIDIA PRODUCTS WIHA WILTON MACHINERY WISS WRIGHT TOOL

Y

YOUNG BROTHERS YUASA INTERNATIONAL

Z

2010-2019 Tool Supply, Inc / Pac-West Tool

US2313641A. Drill grinding device. Google Patents

Publication number US2313641A US2313641A US387746A US38774641A US2313641A US 2313641 A US2313641 A US 2313641A US 387746 A US387746 A US 387746A US 38774641 A US38774641 A US 38774641A US 2313641 A US2313641 A US 2313641A Authority US United States Prior art keywords drill holder carriage ears spindle Prior art date 1941-04-09 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 Application number US387746A Inventor Hoerst Valentine Nickolas Original Assignee Hoerst Valentine Nickolas 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.) 1941-04-09 Filing date 1941-04-09 Publication date 1943-03-09 1941-04-09 Application filed by Hoerst Valentine Nickolas filed Critical Hoerst Valentine Nickolas 1941-04-09 Priority to US387746A priority Critical patent/US2313641A/en 1943-03-09 Application granted granted Critical 1943-03-09 Publication of US2313641A publication Critical patent/US2313641A/en 1960-03-09 Anticipated expiration legal-status Critical Status Expired. Lifetime legal-status Critical Current

Images

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
B24B3/247 — Supports for drills

Description

‘I DRILL GRINDING DEVICE l Filed April 9, 1941 2 sheets-sheet 1 VNHmQrsQ March 9, 1943. v. N. HoERs-r DRILL.GRINDING DEVICE Filed April 9;,1941.2 Sheets-Sheet 2 MN R, mv Po uw xv.

An object of this invention is to provide an improved holder for a twist drill by means of which the drill can be accurately ground and the desired clearance of the cutting edge formed.

Another object of this invention is to provide a drill grinding apparatus which includes a vertically adjustable support and a horizontally movable carriage on the support, the carriage being provided with means for not only clamping a drill thereto but also with means whereby the drill may be rocked relative to the grinding wheel, the latter means including means whereby the rockable portion of the carriage may be very finely adjusted to obtain the desired uniform sharpening of the drill lips.

A further object of this invention is to provide a grinding structure wherein the drill can be engaged with the periphery of the grinding wheel instead of the side face of the wheel.

A further object of this invention is to provide a structure of this kind which can readily be adapted to either right or left hand drills.

To the foregoing objects and to others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and illustrated in the accompanying drawings wherein are shown embodiments of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

Figure 1 is a top plan partly broken away of a drill grinding machine or apparatus constructed according to an embodiment of this invention.

Referring to the drawings, the numeral I designates generally an abrading wheel which is adapted to be mounted on a rotary shaft (not shown) and operated from a suitable power means. A combined base supporting plate and collector I I is provided with a liquid holding pan or reservoir I2 within which the wheel I0 is adapted to rotate. The base member II extends laterally of the opposite faces of the wheel I0 and also extends forwardly as at I3 of the wheel I0.

The marginal edges lof the base member II are provided with upstanding side flanges I4 and opposite end flanges I5 so that the ground material will be retained on the upper surface of the combined collector and supporting member II. The supporting member II is adapted to have a suitable standard or the like (not shown) whereby the base plate I I may be supported in operative relation with respect to the wheel I0.

The base member II is provided on opposite sides of the wheel I0 and slightly forwardly thereof with a pair of sockets or sleeve members I6 and Il. These socket members I6 and I1 are of like construction and each socket member is formed with an upwardly projecting cylindrical extension I8 which extends upwardly above the upper surface of the base plate II as shown in Figures 3 and 4.

A carriage supporting plate I9 is disposed above the upper surface of the base plate I I and has secured thereto a cylindrical solid stem or shank 20 which slidably engages in the extension I8 and in the socket I6. The lower end of the stem or shank 20 has a concave recess 2| therein in which the upper end of a shank adjusting screw 22 is adapted to engage. The screw 22 is threaded through the bottom wall 23 of the socket I6 and is provided with a knurled knob or operating member 24 disposed below the bottom wall 23.

The carriage supporting plate I9 is formed in the upper surface thereof with a longitudinally extending horizontal keyway 25 in which a key 26 carried by a movable carriage 2l is adapted to slidably engage. The keyway 25 and the key 26 are formed in dovetail fashion and preferably a gib or liner 28 is interposed between one inclined edge of the key 26 and the adjacent face of the keyway 25 as shown in Figure 4. The carriage supporting member I9 is provided at one end thereof with an upstanding lug or ear 29 through which a carriage adjusting shaft 3U is journalled.

which a shaft locking pin 32 loosely engages so that the shaft 30 will be held against endwise movement relative to a lug or ear 35 but will be permitted free rotary movement. The outer end of the shaft 30 is formed with a handle 33 and the shaft 3U is also formed with threads 34 which threadably engage the lug member 29 integral with the plate I9. The shaft 30 may be locked in adjusted position by a lock nut 34a which bears against the lug 29.

The carriage 21 has formed integral therewith a pair of upstanding parallel ears or bearing members 36 and 31 which extend upwardly from the upper surface thereof in substantially the longitudinal center of the carriage 21 and the inner faces of the bearing members 36 and 31 are oppositely tapered as at 388L and 31 respectively. A spindle 38 is disposed in horizontal position and is rotatably mounted through openings 39 and 48, which are formed in the ears 36 and 31, respectively. The spindle 38 is provided with threads 4I at one end thereof and at the opposite end is formed with a knob 42. A washer 43 is disposed about the spindle 38 andis interposed between the outer face of the ear 36 and a spindle locking nut 44 which is threaded onto the threads 4I of the spindle 38.

A second washer 45 is mounted on the spindle 38 and is interposed between the knob 42 `and the outer face of the.ear 31. A substantially frustoconical body or eccentric 46 is fixed as by a pin 41 on the spindle 38 between the ears 36 and 31. The eccentric 46 is provided at its smaller end with a frusto-conical bearing surface 48 and is also provided with a frusto-conical bearing surface 49 at its larger or base end. The frustoconical bearing surfaces 48 and 48 are of slightly greater diameter than the outer surface of the frusto-conical body 45. The eccentric member 46 is annular in transverse section and the axial center of the spindle 38 is disposed at one side of the axial center of the body 46. A V-shaped drill holder, or cradle 56 is disposed above the carriage 21 and has formed integral therewith a pair of downwardly extending ears and 52. Theshaft 38 is locked against rotation by a set screw 38a which is threaded through the ear 36.

The ear 5I is provided with a tapered or frusto-conical opening 53, in which the frustoconical bearing member 48 engages and the ear 52 is provided with a tapered or frusto- conical opening 54 in which the frusto-conical bearing surface 49 engages. The holder 50 is rotatable or swingable on the bearing members 48 and ’49 so that a drill D which is positioned in the V-shaped holder 5i) may be rocked relative vto the peripheral surface of the abrading member I0. The bearing members 38 and 31 are provided’on their inner faces with tapered or oppositely inclined faces 36a and 31=1respectively, so that the ears 5I and 52 may move relative to the shaft 38 when the cradle 58 is rocked on the eccentric 46. The holder 58, on its opposite longitudinal edges, is provided with a pair of horizontally disposed and outwardly extending anges 55 with which a pair of drill clamp holding members, generally designated as 56 and 56a are adapted to engage. The holding members 56 and56a are of identical construction and each comprises a truncated V- shaped clamping body 51 which is formed at its divergent ends with vertical extensions 58 terminating in inwardly projecting lugs 59 which are engageable beneath the flanges 55, as shown in Figure 4. Set screws 58a engage through the extensions 58 for locking the holding ‘or supporting members in adjusted position.

The truncated top 68 of each clamping member 56 and 56a`is provided with a nut member 6i and threaded shafts 62 and ’62a threadably engage through the nut members 6l and are provided at their upper ends with operating ‘ members 63 and 63a. The lower end of the shaft 62 Ahas flxedly mounted thereon a drill clamping jaw 64 which is disposed in vertical alignment with the apex of the V formed by the holder 50 so that when the jaw 64 is lowered to a clamping position, the drill D will be tightly held in the holder 58 with the axial center thereof in vertical alignment with the axial center of the shaft 62 and in the vertical plane of the apex of the V formed by the holder 50.

The shaft 62a has swivelly mounted thereon a swivelled head or floating center 64EL having a drill center engaging pin 64b. If desired the head 64a may be turned about 90 degrees so that the head 64EL will abut the Vend of the drill D without engaging in the center of the drill.

The holder 50 on the inner surface thereof and on one side has a drill positioning member 65 mounted thereon which is of substantially V-shape in transverse section and which is adapted to engage in the groove of a twist drill.

A plate 66 is formed with the drill positioning member 65 and is provided with an elongated slot 61 in which a fastening member 88 engages. The fastening member 68 is constructed in the form of a machine screw which is threaded into the adjacent side of the ` holder 50 so that the drill positioning member 65 may.be shifted inwardly or outwardly with respect to one side of the holder 56. When the clamping members 55 are in clamping position, they will be disposed as shown in Figures l, 2 and 3 adjacent the opposite ends of the holder 58 so as to tightly clamp the drill D in the holder 58 with at least one end of the drill D projecting ‘forwardly of the holder 50 for Contact with the periphery of the abrading member I0.

rIhe two ears 5I and 52 are arranged so that when the holder 58 is rocked on th’e eccentric bearing members 48 and 49, the ears 5| and 52 may7 ‘move so as to thereby move the holder 50. This movement will provide aslight clearance on the cutting end of the drill back of the cutting edge thereof, the amount of the clearance depending on the relative position of the eccentric body 46 as determined by circumferential’adjustment of this body 46 through the adjustment of the spindle 83 and the knob 42. The outer face of the knob 42 is provided with a plurality of circumferentially arranged graduations 69 and the ear 31. at the upper portion thereof is provided with a stationary pointer l16 by means of which the user of this device will be able to determine the relative position of the eccentric 46.

The two sockets I6 and I1 are disposed ‘with the axial centers thereof on an angle of ‘thirty degrees with respect to the cylindrical peripheral surface of the abradingmember I8 so as to thereby grind the forward Vend of the drill D on the desired angle. The ear 52 may be’provided with an outwardly projecting stop member 1| which, in one position of the ear 52, is adapted to engage the ear 31 so as to thereby limit the rocking movement of the holder 58 in one direction. This limit of the rocking movement of the holder 58 may be at the point Where the forward end of the drill D swings out of contact l’with the peripheral surface of the abrading wheel I8.

In order to provide a means whereby therholder 58 with the carriage `21 may be disposedat the desired angle with respect to the peripheral surface of the abrading wheel I8, the socketsI and l1 may be provided with set screws 12 which engage the shank 28. In this manner the shank 28 is held against rotary movement with respect to the socket member I6 andthe tightening “of the set screw 12 will ilrmly hold the shank or stem 2U in the adjusted position within either of the sockets I6 or l1. The two sockets I6 and I1 are provided so that both right and left hand drills D may be ground or sharpened, the socket I1 being used for left hand drills.

In the use and operation of this structure the drill is tightly clamped in the holder 50 by the clamping member 62 and the positioning member 62@- and is positioned by adjustment of the positioning member 65 so that one lip of the drill will be disposed in a position for contact with the peripheral surface of the abrading member lil. The height of the carriage holder i9 and the carriage 21 is adjusted by means of the carriage adjusting screw 22 and when this position has been obtained with the axial center of the drill D about ten or fteen degrees below the axial center of the abrading member Ii), the locking screw 12 is tightened. Adjustment of the spindle 38, by means of the knob 42, will regulate or control the amount of movement of the holder 5i) as it is rocked relative to the abrading member l!) through the grinding zone so as to thereby form the desired clearance back of the cutting edge of the drill lip. The holder 56 may be adjusted toward or away from the abrading member l0, by turning the threaded shaft 30 which will move the carriage 21 toward or away from the abrading wheel l0. When the drill is disposed in the desired position for contact with the periphery of the abrading wheel lo, the ‘shaft 3Q may be locked by the lock nut 34a so as to prevent accidental shifting of this carriage. In this manner one lip of the drill D may be sharpened to the desired degree and after this one lip has been sharpened, the drill D may be loosened in the holder 50 and turned to position the other lip of the drill for engagement with the abrading wheel lil.

A drill grinding means comprising a support, a stem adjustably carried by said support, a plate carried by said stem, a carriage mounted for horizontal adjustment on said plate, a pair of upstanding spaced apart ears carried by said carriage, said ears having axially aligned bores therethrough, a rotatable spindle journaled in said ears, means for locking said spindle against rotation, a pair of spaced apart eccentric rigidly secured to said spindle between said ears, a drill clamping cradle, and a pair of spaced apart downwardly extending ears carried by said cradle, said ears having bores therethrough for the journaling therein of said pair of eccentrics whereby rotation of said eccentrics will eiect a predetermined movement of said cradle.

A drill grinding means comprising a support, a’ stem carried by said support, means for vertically adjusting said stem, a plate carried by said stem, a carriage mounted for horizontal adjustment on said plate, a pair of upstanding spaced apart ears carried by said carriage, said ears being provided with axially aligned bores therethrough, a rotatable spindle journaled in said ears, means for locking said spindle against rotation, an eccentric rigidly secured to said spindle, and a drill clamping cradle rockably journaled on said eccentric whereby rotation of said eccentric will eiect a predetermined movement of said cradle.

Priority Applications (1)

Application Number Priority Date Filing Date Title

US387746A US2313641A ( en )

1941-04-09

Drill grinding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title

US387746A US2313641A ( en )

1941-04-09

Drill grinding device

Sources:

https://patents.google.com/patent/US2401471A/en
http://toolsupply.com/linecard.htm
https://www.google.com.gi/patents/US2313641

JUSOF.COM

Line Card. Lisle drill grinder

US2401471A. Drill grinder. Google Patents

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US2313641A. Drill grinding device. Google Patents

Links

Images

Classifications

Description

Priority Applications (1)

Applications Claiming Priority (1)