US1949592A - Valve-production method - Google Patents

Description

March 6, 1934- J. VERDERBER ET AL VALVE PRODUCTION METHOD Filed Aug. 15, 1930 3 Sheets-Sheet l INVENTORS ATTORNEY March 6, 1934. J. VERDERBER ET AL VALVE PRODUCTION METHOD 3 Sheets-Shet 2 Filed Aug. 15, 1950 March 6, 1934.

J. VERDERBER ET AL VALVE PRODUCTION METHOD Filed Aug. l5, 1930 3 Sheets-Sheet 3 INVENTORS AZ ??n-Zarar m ATTORNEY Patented Mar. 6, 1934 Batter-man,

East Cleveland, Ohio Ap licatia Aug'nstifi, 1930, Serial No. 475,600

cl ims. (o1.29--1s6;7)

' llhe surfaces 12 and 13 are not to be Our invention relates to methods of'forming and machining valves.

The object of our invention is economic production of valves.

In valves, suchas poppet valves, it isquite desirable that economic production thereof is .attained and'th'at important surfaces thereof are true with each other.

Our invention aims production of valves mostecon'omic production thereof is attained and the important surfaces thereof are true with each other so that valves fit intoltheir positions without manual fitting except invariably required to produce a good fit betweenthe valve and its seat. :1

,In order to assist in the illustration of our invention, we present herewith drawings illustratively and diagrammatically showing -;how mechanism may operate toattain the steps of our invention specifically showing 'illustratively describedherein.

drawings mentioned:

and more or less diagrammatically arrangements of tools useful in carrying out our method.

Fig.1 2 is a diagrammatical viewishowing one-1 blank through a; group ofmadevelopment of a chining. steps of our invention as specifically described herein. 7

Fi 3 is a perspective view of amii'sii dtave.

Fig. 4 is a perspective view of, the machining part of-a centerless grinder. I h Fig. 5 is a sectional view of the'machining part of a finish grinderwith valve centering means.

characters. refer to similar Similar reference parts throughout the views.

One manner of carrying out .our invention,

illustratively, setting plained herein specifi generally to mechanisms, suggestively. shownjn 'forth cally reference being made the accompanying drawings, adapted for carr'ye ing but the specific method describedherein. One type of finished valves is shown in and one method for production thereofjis describedherein specifically referring to possible mechanism for such production.

Ablank is first formed for the val this blank has finishing stock on the diametrically the. t m. t ereof and t larger parts 10 of valve portion 11 of thelheadthereof andon the outer end ofthestein first formed by any s tion mostly concerns method of valves.

hereon. ,Th r lve may. b ita Our invite-" the machining means and the blank'is placed into a device for automatically 11( the grinding in which is V the heat. treating if usedgat this stage of valve production, the

:Fig'. ;4 so tha t. rotation of the grinding wheels rota es thea kfin parts 10.

our invention, isex-- used, only. when .sn waan the blankisremoved.

if desired. J

' icompletiiifi of map, f thebla'nk. the same may be heat treatedif desir d :Upon completion of the blankformation and e may be m ch a diametrical finishing size, (leaving stock for final machining tofinish size) or may be machined to the final finish size (leavingstock for final grinding).' as desired. or as maybe desirable for various valves or valve product-ions n I I 4; E

. For economic-production ofv valves, weprefer to use a cente'rless, grinder, well known, in the, art; the operatingpajrt of one ofsuch machines is i1- lustrativelyshown in Fig.4, a n j, I Theblank is'placed in between the two rotati rindingwhe sA and B s -9M5 Y tically supported on thesupport C as shown in its axis. as well as-grinds the .stem as is well understood in such machiningin l uc1 hdeyi s. I a A r ritm -i t cef.o ly'ithe partsio ti e,

'. are machined, leaving the parts 14, originally formed to finalsize, as rough formed and thereby facilitating the machining operation on' the flt is, 'of -l course, quite obvious stem a be. machined by I cutting tools such, 'as are used in lathes and the like but this procedure requireseither centers or chucking ,or othei'holding means-as well as rotating means and is recommended only when a c'enterless machining device is .not available or. cannot .be' used. IIfIhi's. cutting tool procedure. requires mo're time as compared with the abrading tool procedureand should be.

the latterbanno't be used., l'.l 1e' procedure is a more" advantageous cutting; tool step in economi production of valves when a a e ount s oc is t w r movedpoa ompletion orthepm chinin cf tn. stem...

fromthe ce'nterless' grinder" [for furtherma'chining thereof.

Upon removal pr he bl p1; from thejiiiider,

on the spindles.

This group of steps is intended to perform machining operations as follows:

Drill driving holes 15 or mill driving slots 16 in the outer end of the head and cut thestem to length;

Drill a centering hole 17 into the head if driving holes are used in the head but drill the centering hole in the first step and mill the driving slot in this step and also provide the chamfer 18 for future centering of the blank;

Machine the head to diametrical size and machine the valve face and provide the groove 19 in the stem-y And loading and unloading the turret.

The turret has four collet mechanisms K, L, M,

h and N exchangeable for valve stems of different sizes and lengths and is automatically indexable into four positions by mechanism operated by the driving mechanism of the device between the steps of this group of machining operations and is held in these positions by the index mechanism 20 automatically operated by the driving mechanism of the device and set into indexing motion upon completion of each machining operation of this group.

For thepurpose of conveying a clear idea of our invention we have presented Fig. 2 in the drawings and have designated the loading and unloading station as O, the first machining step as at station I, the second machining step as at station II, and the third machining step as at station III.

After the blank arrives at station I, the drills 21 are automatically rotated and fed bythe machining spindle E to drill the driving holes into the valve he'ad'while the cutting off tool 22 in the machining spindle F automatically cuts the valve stem to desired length; the centering drill 23 in the spindle Gis automatically rotated and fed to provide the centering hole in the head of the valve and the chamfering tool 24 in the spindle H is operated and fed .to chamfer the end of the stem to provide a centering means for a hollow or bell center; thetools 25 and 26 in the spindle I are operated and fed to machine the outside diameter of the head and the angular face of the head and the forming tool 27in the spindle J is operated and fed to machine the groove 19 inthe stem. I

- Upon one completion'of this group of steps, the turret is automatically indexed, advancing each blank to the next station where the above describing operations are repeated and this process continues as long as the device is in operation;

At each indexing of the turret, the blank then at station III moves to the station Oand is there released automatically upon completion of. the indexing movement of the turret and is automatithe next indexing operation of the turret.

' While the turret is stationary, between the indexing operations, the operator removes the released blank at station 0 and replaces the same with a rough blank to go through the indexing and machining operations described and this loading and unloading and successive machining is continued as long as the machine or device is in operation.

' When the blankrarrives at station'O, the collet mechanism opens automatically and thereby releases the blank from its grip by the mechanism and the operator removes the blank from the turret and places another blank into the mechanism while the tools are performing machining operation on each one of the other blanks held in the turret. r

A When all machining operations are completed, the turret operating mechanism releases theindex pin and indexes the turret in the direction of the arrow and thereby moves the blank from station 0 to station I, another blank from station I to station II, another blank from station II to station III, and another blank from station III to station 0, and then locks theturret in this indexed position upon completion of the indexing.

As the turret is so indexed the collet mechanism is first released to release the blank previously in the collet now at station 0, the operator 7 then removes the machined blank in this collet and-puts a rough blank into its place for indexing thereof to station I in the next indexing operation and this collet grips the blank and holds it in the turret when the same is indexed from station 0 to station I and retains the hold through the stations I, II, and III.

In this manner, this group'of machining operations is performed automatically and a blank is 110 released automatically at each indexing of the turret.

Upon completion of this machining operation, the blank may be heat treated, for hardness or otherwise if desired. I

The stem may then be machined to final size, preferably in a centerless grinder, as shown in Fig. 4, if stock has been allowed for finish machining in the first stem machining operation.

The blank may then be placed into machining device (Fig. 5) having a center 28' for the centering hole in the head of the valve and a cup center 29 for the chamfered end of the stem and a machining tool, illustrated by the grinding wheel 30, for'finish machining the valve seat on the head if desired.

The end of the stem may also be further machined, preferably by grinding, to provide a better contact surface for the push rod for "such valves. V

It appears to be obvious that the means and steps canbe varied, one or more omitted when unnecessary on certain valves, and meansand steps can be added such as smoothening unmachined surfaces. 1

In the manner set forth herein valves can be produced most economically.

We are aware that changes andmodifications can be made in the means and steps set forth herein, that some means and steps mentioned herein can be omitted when desired and that other obvious means andsteps can be added or changed or modified when desired within the, spirit and intent and scope of our invention and the appended claims; therefore, without limiting ourselves tothe precise means and the precise order and number of steps as shown and described.

We claim? f 1. A valve production method including ma chining the stem of a blank for a valve, gripping the machined stem and leaving both ends thereof exposed, moving the blank from station to station to present the ends thereof to tool means at stations, machining a driving recess into the head of the blank and cut stem to length while the blank is at one of the stations, machining centering means on the ends of the blank while the same is at another one of the stations, machining the head of the blank and groove the stem thereof while the same is at another. one of the stations, and release the machined blank and grip a new blank while at the final station;

2. A valve production method includingrforming a blank for a valve, machining the stem of the blank, gripping the stem and leaving both ends of the blank exposed, automatically moving the so gripped blank into indexed positions, and automatically bringing tool means into operation on the ends of the blank while'the same is so gripped to machine the blankvto length, machine driving depressions into the head of the blank, machine center means on the ends, ma-

chine the head of the blank, and form .a groove in the stem. 1

3. A valve production method'including forming blanks for valves up to machining the heads and the ends thereof, grouping tool elements to simultaneously operate on both ends of each of the blanks, automatically gripping the so formed blanks successively and leaving both ends thereof exposed, automatically and successively moving the so gripped blanks into presence of the 7 tool elements, and automatically machining both ends of each blank simultaneously, including centering means for use in later machining operations on the blanks, and in succession of one blank after another.

4. A valve production method including forming blanks for valves, machining the stems of the blanks, automatically and successively gripping each of the so formed and so gripped blanks and leaving the ends thereof exposed and by this gripping centralizing each blank successively, grouping machine elements to operate simultaneously on both ends of each blank while the same remains so gripped, including centering means for future use of machining the blank, and heat V treating the blanks either before or after machining thereof as desired. 7 5. A valve production method including forming a blank for a valve with relief portions in the stem thereof, machining the stem in a centerless machining device, automatically gripping the blank by thestem thereof in a device adapted to be indexed and leaving'both ends thereof exposed,

:grouping machining elements to simultaneously chining the stem of the blank in a centerless machining device, andpositioning the blank by the centering means for further machining other parts of the blank.

. JOSEPH VERDERBER.

ELMER BATTERMAN. 1

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