US1377884A - Machine for grinding tools and for similar purposes - Google Patents

Description

S. Hmmm Mm DUBREUCQ. I/IACI'IIII'E FOR GIIIIIDIIIG TOOLS AND FOR SIII'IILAR PURPOSES.

IRPPLIC/ITIUi-I FILED MAR, 2B, 15H9. V

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S. HERYNGFEL AND F. DUBREUCQ. MACHINE FOR GRINDIIIIG TooIs AIIII Foa SIMILAR PURPOSES.

APPLICATION FILED HAR, 28, 1919.

S, HERYNGEL AND F. DUBREUCQ.

IIIfIcIIII-IE FOR GRIIIDIIIG TOOLS AIIID FOR SIIIIIIAII FIIRPoss,

APPLICATION FILED MARI 28. i919.

16 SHETS-SHEET 3.

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S. HERYNGFELAND F. DUBREUCQ.

MACHINE FDR GRIIIIDIIIG TO0LS AND FOR SIMILAR PURPOSES. APPLICATION man MAI-1.28. I9I9.

I 6 SHEETS-SHEET 4.

Patient@ Mw my M9211.

S. HERYNGFEI AND F. DUBREUCQ. MACHINE FOR GHINDIIIG TOOLS AIIID FOR SIMILAR PURPOSES.

APPLICATION FILED MMI. 2'8, |919.

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I I5 SHEETS-SHEET 5.

S. HERYNGFEL AND F.l DUBREUCQ. mAcHmE ma GmNnlmG T'ooLs AND for: Smm/R PURPOSES.

APPucATloN man MAR. 2B. 1919.

I6 SHEETS-SHEET S- @www for@

S. HEHYNGFEL AND I". DUBREUCQ. MACHINE FOR GRINDING TOOLS ANI) FOR SIMILAR PURPOSES.

APPLICATION FILED IIIAII- 28| I9I9 @37734, mmm Mw m wm `us sHsgTs-SHEET 7.

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s. HEHYNGFEL Mm F. Dumuc.

MACHINE FOR GRINDING TOOLS AND FDR SIMILAR PURPOSES.

APPLICATION FILED MAR. 28. 1919.

Patented May 10, 19M.,

I6 SHEETS-SEEN I3- S. HERYNGFEL AND I". DUBREUCQ. MACHINE FOR GBINDING 'IOOLSAND FOR SIMILAR PUBLPUSIS.

APPLICATION FILED IIIAI'I; Z9. |919.

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Ys. HERYNGFIEL AND F. numucfp. MACHINE IOR GRINDING TOOLS AND FOR SIMILAR PURPOSES.

APPLICATION FILED MAN. 28, 1919.

L77884 l A Patented May Lm 1921..

16 SHEETS-SHEET 10.

Patemd May 1% 1921.

I6 SHEETS-SHE?! Il.

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S. HI-IRYNGFEL AND F. DUBRIUCQ. MACHINE FOR GRI'NDING TOOLS AND FOR SIMILAR PURPOSES.

Awucmon man mn. 2a. 1919.

Patented May M9 19m.

I 6 SHEETS-SHEET I 2.

S. HERYNGFEI. AND I'.I DUBREUCQ. MACHINE FOR GIIIIIDING TO0I.S -AND FOR SIMILAR PUHPGSES.

Mmc/mon mso mn. 2a. |919. L, .Paed May M39 19229..

I6 SHEETS--SHIEEI4 l 3.

S. HERYNGFEL AND F. DUBREUCQ.

MACHINE FOR GRIIIIIING IooLs AIID 'FOR SIMILAR lPURPOSES.

APPLICATION FILED MAR. 28, 1919.

Patented May w, i921 \E SHEETS-SHEET 14.

Wwf/16% s. HERYNGFEL AND F. DUBREUCQ.

MACHINE FOR GRINDING TOOLS AND FOR SIMILAR PURPOSES.

APPLICATION FILED MAR- 28. 1919.

Datenfd May my 1921.

16 SHEETS-SHEET I5,

S. HERYNGFEL AND DUBHEUCQ.

MACHINE FOR GBINDING TOOLS AND FOR SIMILAR ?URPOSS.

APPucMloN mw ma. 2s, 1919.

16 SHEETS-SNEEK IB.

i civil engineer,

FFATES T' QFFM.

SERGE EERYNGFEL AND FNELON DUBRE'UCQ, 0F CHARENTON, FELANCEE; SAID DUIBREUCQ-ASSXGNOR T0 SAID HERYNGFEL. i

MACHINE FOB. GRXNDXNG TOOLS AND FOR SEIMILAR PURPOSES.

terasse.

To alito/tom t may concern.'

Be it known that we, SERGE Hnnrnerni.

a citizen of the Republic oi France, residing at Charenton, Seine, France, and FNELON DUBREUCQ, foreman, a citizen of the Republic of France, residing at 3 Avenue de la Libert, Charenton, Seine, France, have invented new and useful improvements in and Relating to- Machines for Grinding rlools and for Similar Purposes, of which the following is a specification.

The invention relates to that particular class or' machine for grinding 'standard tools, 'which is equipped with appliances for adjusting -the tool in all planes or positions relative to the grinding wheel.

.Broadly speaking the novelty of the hereindescribed machine resides in that the relative movements between the. grinding wheel and the tool are automatic. The invention consists essentially in the hereinafter described contrivances by the aid of which the above mentioned result is achieved. Another feature of the invention consists in that the machine is itted with an arrangement which permits, without trials, the immediate grinding of standard tools such as are in current use. Another feature ot the invention consistsv in a reproducing cam device whose prole can be made as desired so as to allow of grinding `tools of varying forms and proiiles, in;- cluding milling cutters, boring cutters and even drilling tools.

Two ty es of the machine have been designed, odel No. l which is suitable 'for mechanical work-shops in which the-work comprises the machining of parts of smalll or medium ,dimensions and Model Till which is very much more powerful and is designed tor the machining ot large parts and 'for removing large masses of metal. The machine consists essentially o following parts A. A frame. B. A system of carriages having longitudinal and traversing movements actuated either automatically or by hand as desired. C. A system of members .constituting the automaticmovements for actuating the carthe riages and apparatus on which are fixed the tools to be ground. f y

D. in abutment and positive -inde-X mech.

Specification of Letters atent.

3 Avenue de la Libert,

. and positive index mechanism.

, Patented lil/lay 169., 1921.

Application :tiled March 28, 1919. Serial No. 295,880.

anism for the instantaneous' positioning, witiout any preliminary of certain standard too s.

Figures 1 to 21 inclusive show the -rst type.

lgs. 22 to 25 show the second type.

Fv-st type.

Fig. 1 is a front elevation of the machine mounted on a standard, which is shown broken away.

Fig. 2 is a plan.

Fig. 3 is a side view.

Fig. 4 is a front elevation showing a modiied form of grinding device.

Fig. 5 is a general View of 'the mechanism for imparting automatic motions.

Fig.`6 is a section along the line 6 6, ot

ig. 7 is a front view, nism for the progressive advance of the carriage toward the grindin wheel.

Fig.l 8 is a side view o Fig. 7. Fig.` 8a is a part sectional view showin the automatic ineans for actuating the transverse shaft in released osition. Fig. 9 is'a sectional elevation along 9-9, Fig. 10, showing the mechanism' for the reciprocating motion of the longitudinal carria e.l i

ig. 10 is a plan view as in horizontal section along 10, if?, Fig. 9. Fig. 11 shows. in elevation the abutment showing the mecha- Fig. 12 is a side elevation of Fig. 11.

Fig. 13 is a planet Fig. 1l, partly in section.

Fig. 14 is an elevation ot the arrangement comprising a reproducing cam.

Fig. 15 is a side View ot Fig. 14. Fig. 16. is a section along line 1G, 16. Fig. 1li.'

Fi 17 is a diagrammatic plan view showingt e position ot the tool and the grind ing 'wheel in the case o' the use ot the reproducing cain.

Fig. 18is a diagrammatic view ot the outline of .the reproducing cam for the grinding of a tool having a certain prole.

Fig. 19 is an elevation showing the positionl of the apparatus 'for the grinding of a lathe-tool.

Fig. 20 is a side view of Fig. 19.

Fig. 21 is a plan view ot Fig. 19,

Second type.

FmsrTrPE, (Figs. 1- to 21.) Frame and' carriages, (Figs. 1, 2, and 4.)

A. The frame consists of a dish-shaped table 1 mounted on a cast-iron standard 2. On the table 1 is fixed a grinding-wheel holder in two parts 3, 4. The part 3 is The transverse carriage 14 is actuated by means of a screw in the same way as the carriage of an ordlnary lathe.` The move- ,ment of this carriage for moving it toward lof a lever 21, when it is desired to work it fixed by means of bolts to the table 1; the

upper part of the holder comprises two sleves, one of which receives the shaft 24 carrying the pulleys 5 and 6 of the transmission mechanism, the pulley 7 driving the shaft carrying the grinding-wheel 54 and the pulley for driving the pump, Vwhilethe other receives the shaftv l0 upon which the grinding wheel is mounted.v The part l3 forms a pivot for the movable arm 4 and consequently for the grinding wheel holder.

The portion 4 or movable arm which car ries the grinding wheel holder can be regulated as to height by means of the regulating screw 8. The movement is obtained as follows z-One of the branches 4a of the movable arm is provided with a vlug 4b the end of which moves in a circular guide 3b which is concentric with the horizontal axis of pivot 3 and isfixed on one of the arms of said pivot. The screw 8 is mounted in a screw threaded boss 3a of the other branch of the pivot support 3 and acts through its end on an extension 4c of the second branch of the movable arm 4. It is obvious that by turning screw 8 in a direction in which a thrust is exerted, the extension 4c and consequently the arm 4 are pushed upwardly, by turning screw 8 in opposite direction, the movable arm 4 turns downwardly by the action of gravity. A lock nut (Figs. 1 and 2) permits the fixing of the oscillating arm 4 when the grinding wheel is at the required height.

The shaft l0 rotates in bearings 11 which are fitted into conical'seats. In order to {permit of rapidly changing the grindin wheel 54, thel end of the corresponding shat is provided with Va screwed fmandrel. 12 which can belocked or released by hand.

B. The system yof carriages consists of` three parts The pivoting support 13 which, by means of the sca-le 16 and the fixed reference mark 1 7 allows of positioning both the longitudinal and transverse carriage according to the angle required in the horizontal plane. The whole can be fixed in place by means of the nut 18.

by hand; it can also be given an automaticreclprocating movement by means of a device described below.

A groove formed in theside of the longitudinal carriage 15 enables abutments 23 to be fitted so as to limit its stroke if necessary.

The device for holding the tool 66 to be ground is riage 15.

0. Automatic movements.

The mechanism for transmitting the automatic movements is mounted in a case 2O shaft 24.l

The automatic movements are three in number. medium of flexible shafts.

(1) Automatic reciprocating movement` of the longitudinal carriage 15 and' consequently automatic movement of the tool in front of the grinding wheel 5 4, which produces the operation of grinding proper. This movement is utilized when the grinding device is used with abutment and posi tive index marksland, in general, for grinding tools having a current profile.`

2) Automatic progressive advance of the transverse carriage 14 and consequently of the tool 66 toward the wheel 54 until the necessary amount of metal has been removed from the cutting edge of the tool.

(3) Oscillator-y movement of the plate carrying the' reproducing cam. This movement is utilizedwhen using the device for grinding tools having special profiles.

placed upon this longitudinal car- They are effected through the ear placed on a prolongation o thel (1 Automatic reciprocating movement of tz-e longitudinal carriage 15, (Figs. 5 to l 10.)

Thls movement originates at 26. At the end of the shaft 24 is fixed a worm-wheel 28 having on'onevside teeth 29 which can .engage with similar teeth on a Sleeve 298L which receives at 26, a flexible shaft 26a` (Figs. 1 to 4). In the upper portion of the cover of the gear-case 20 is formed a slot 30` nennen (Fig. 5), that is to say disengaged, if it is desired to couple up, one need only press upon the knob 33 of the lever in such a manner as to cause the stop 36 to leave the notch 85 and throw the lever whereupon the stop 26 will fall into the notch 37. At this moment, the jaws of the sleeve 29a are in enagement with those of the wheel 29; the flexible shaft 262L therefore rotates at the same speed as the shaft 24.

Figs. 2, 9 anal 10.

h 0n the carriage 14, Fig. 38 which contains a worm 39. r"ihis latter drives a wheel 4G carrying a shaft 41 on the end of which is fitted a crank 42 having a pin 43 which receives the driving rod 22 (Figs. 2 and 9). This latter is connected at its other end by means of a pivot pin 44 to the table of the longitudinal carriage 15 (Fig. 2). rllhe flexible shaft 26a being connected to the shaft of the worm 39, (Fig. 10), the rotation of this latter causes the crank 42 to rotate and, through the intermediary of the connecting rod 22, imparts a reciprocating motion to the carriage 15.

(2) Progressive advance of the trans/verse carriage 14 2, is fixed a casing The mechanism for putting the movement into gear is located in the same casing as that which contains the coupling mechanism for the carriage 15. Coupling and uncoupling are effected by means of the lower lever 46 (Figs. 1 and 5.) rl`he latter is held in one or the other of the notches 47 or 48. The eect of these movements is to move the wheel 4'5 toward or away from the worm 28, thus .eecting coupling and uncoupling respectively of the flexible shaft 25a (Figs. 1'to 4) starting at 25, as shown in Fig. 6.

' Figs. 7 and 8.

. At the extremity mounted on the screw for advancing this carriage, is arranged a ratchet-mechanism. This mechanism, which is ca able of a slight sliding movement in the irection of the carriage, owing to its being mounted on two pins on the extremity of the carriage, conprises a spindle 49 having at one end an eccentric stud 49a which spindle receives at one end the'fiexible shaft 25a and at the other a pawl 50 fitted on the stud 49a. Uwing to the said eccentricstud 49a, the pawl 50 is given an oscillating motion which causes it to act on a ratchet wheel 51 and to impart to this latter and consequently to the worm 52 and the wheell 53 an intermittent rotation', the effect of which is to produce a very slow advancing movement of the transverse carriage 1 'The extremity of the screw 55 (Fig. 8)which actuates the carriage 14 is of conical form, as is also the bore of the wheel 53. lin order of the carriage 14 andl lment of the latter.

When it is desired to actuate the carriage 14 by hand, the' nut 56 is slacked back and then the crank 19 (Fig. 1) is manipulated.

During the course of an operation, it is l not necessary to slack back the nut 56 in order to stop the advance of the carriage; if the pawl is raised by hand, this will interrupt the movement and enable the tool 66 to be examined or calibrated, if necessary.

(3) Oscillating movement of the plate 85, (Figs. 2,' 5, c, i4, i5, 1c.)

rllhe automatic drive is assured through the same lever 46 which effects the automatic advance of the carriage 14.'- The flexible shaft 27a (Fig. 2) is attached to the end 27 of the shaft carrying the wheel 45 and terminates at the connection 64 on the extremity of the shaft 87 of the crank 86. A connecting rod 88 is connected to the pin 92 of this crank and the other end is connected to the plate 85. The rotation of the flexible shaft 27a therefore imparts an oscillating motion to this plate, that is to say the grinding movement of the tool 66 against the wheel 54.

THE GRINDING APPARATUS DESCRIPTION or PROPER.

These apparatus in which the tool-s to be ground are fixed are of two kinds:

(1) Apparatus pro/vided with positive abatnts anal indem marks.

tools having simple profiles, whether straight or curved, in general use in workshops.

(2) Apparatus using a reproducing cam.

This apparatus is used for the grinding of tools having any profile desired, the profile of the cam being determined accordingly.

flhe two apparatus only differ in certain elements; they have the following parts in common, Figs. 11 to' 16 A pivoting support 57 in the form of a right-angle which can turn in a horizontal plane about a bolt 58. lts 'circular soleplate 60, Fig. 11, carries a scale 59 on its entire periphery relative to a .fixed mark 61 and al lows of its positioning in all positions necessary for grinding. n the vertical rounded portion of the support 57 are fixed, on the one side, the central sleeve 62 carrying an arm 64, and on the other side, a sleeve 6?). rllhese sleeves 62 and 63 can pivot about a horizontal axis and. can assume an, inclined position determined by the scale 65 marked upon the circular periphery of the top of the support 57.

Apparat/as uwiag positie/'eabutments cmd positive indem 'maf/'70s, (Figs. 11, 12, 13 and 19, 2o, 21).

the tool 66. ig. 13, supindeX apertures 71 (-Fig. 12), whose posi-U tions correspond exactly to the Vangles of inclination 72 of the edges of the tools relative to the body thereof. The angular positions corresponding to the diii'erent types of tools to be ground are immediately obtained without any preliminary adjustment by means of a pin 83 which can fall into one of the apertures 71. The upper portion of the plate carries a boss to which the clamp or toolholder 68 can be iXed.

The clamp or tool-holder 68 can pivot about an axis 68a in such a manner as to allow of obtaining the inclination lcorresponding to the lateral clearance of the cuttin edge of the tool.

scale 74 formed on the circular edge of the tool holder 68 permits of verifying the exact angular corresponding position of the tool 66. The desired position can be determined instantaneously and without preliminary adjustment -by means of the pin 83 which falls into one aperture of the -circular portion 6 7 of the plate 67 which corresponds to the inclination required for grinding. The tool is held in place by means of two clamping screws 77. Finally, the washer 81 keeps the whole in place in the sleeve 62.

(3) The grinding shaft 69 of the plate 67 is boredfrom end to end to receive a rod 78 which holds the abutment 78b for. determining the height which the tool isto have in its grinding position.

A spring 78%1 surrounding said rod tends to push the abutment 78b constantly away from the plate 67 z'. e., from left to right.

The rod terminates V1n a milled knob 79 provided with a stop pin 80.v The knob 79- permits of disengaging the abutment at the righthand end of the rod 78 from theedge of the tool, as soon as this latter is at the desired height. Disengagement having been elfected, the knob is rotated in sucha manner as to bring the stop-pinSO on the boss 81', which prevents any return'oi:` the abutment into Contact with the grinding wheel v during the operation.

The sleeve 63 forms a housing for the stop-pin 83 of the plate 67, which holds the tools for each of vthe'positions determined by the apertures 71. pressed toward these apertures by a sp 82. cient to pull on the lmob 84 when the point ring his pin is constantly In .order to rotate the plate, it is sntliof the pin is disengaged from its aperture and the plate 67 is free.

Figs. 14 to 18 :Apparatus with a reproducing cam for grinding tools of .varying pro- On the late 85 (Fig. 16) is mounted a cam 90. T s cam has `a prole which corresponds to that of the tool 661L to be ground. The plate is thrust against an abutment roll 91 by the spring 89. If an oscillating motion in the directions of the arrows f', f2, Fig. 15, is imparted to the plate, the tool 66 is given an advancing and retreating movement relative to the wheel 54, in accordance with the recesses or projections of the cam 90 and in consequence a grinding of the tool to the shape of the cam.

In order to obtain this movement automatically, the crank 86 is placed in the sleeve of arm 64, thiscrank having a crank-pin 92 rod 88, Fig. k15,

which receives the driving (see also Fig. l) connectlng the pin 92 to another pin 93 fixed on the plate 85. As the end oi the shaft 27 is connected by flexible shaft 27a to the shaft 94, the motion is transmitted to the crank 86 which causes the desired oscillation to take place. lt will be understood that it is possible with this apparatus to grind the face of a tool to any desired profile, all that is necessary being to mount on the plate the corresponding cam.

SECOND MODEL, (Figs 22 to 25.)

- liminary adjustment or fumbling the eXaot position which the tool must have, according to its shape and profile. But the construction of the machine has had to be modified in order to insure the 'necessary rigidity and strength'of the different parts in view of the large cross-section of the tools to beground and the heavy cuts madeby the large'grinding-wheel used. A

The grinding-wheel 54 always remains at the same height and it is the table 1 carryf ing the longitudinal carriage 15 and the transverse carriageV 14 which can be raised or lowered by means ofa screw driven by a hand-wheel. The movements of the car-

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