US1646260A - Straightening press and method of straightening - Google Patents

Description

Oct. 18,1927, B P SCHILTZ 1,646,260

STRAIGHTENING PRESS AND METHOD OF' STRAIGI'ITENING Filed April 8. 1922 3 Sheelzs-SherJ l hlmuilllllj);

Oct. 18, 1927- B P scHlLTZ STRAIGHTENING PRESS AND METHOD OF STRAIGHTENING Filed April 8. 1922 5 SheetsSheet 2 cto 0 18 1927 B. P. scHlL-rz STRIGHTENING PRESS AND-METHOD OF S'LRAIGH'IEIHNG 3 Sheetfs-Sheet ,'5

Filed April 8. 1922 Patented Oct. 1S, 1927.

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BERNARD P. soltura, or CLEVELAND, onto, Assmann( To THE ze. A. GEIER COM- PANY. or otnvnrisamgoaro, A jCoRPoRATIoN oF 01,110.

STRAGHTENING AND METHOD 0F STRAIGHTENING.

Application ined .April e,v

'f Vart which lack my improvements.

t is necessary in the use of yall straightening presses of such prior art with which I am acquainted, to support the shaft or part operated upon, preferably from its terminal i centers, gauge its deiiection, take it from its supports, place it inthe straightening press for preliminary treatment, and repeat these successive steps several times. It is obvious that the constant handling of the shaft entailed, as above described, by the well known appliances of the art, is productive of delay, expense and inaccuracy. t

Accordingly, it has been my thought to provide a press wherein the several operations of gauging and straightening may be rapidly accomplished in the simplest and most accurate manner. .T he features of my improvements may best be explained by making reference to the accompanying drawings Fig. l thereof showing in perspective a straightening press embodying my invention.

Fig. 2 of said drawings is a vertical sectional view of the same press upon a slightly larger scale. Y

Fig. 3 is a fragmentary plan View of theI gauge wheel. V

Fig. 4 is a detail of one of the end supports for the shaft in front elevation.

if ig. 5 is al side elevation thereof.

Fig' is a detail of the gauge supportin front elevation, showing said gauge depressed, together with the adjustable standard.

. 7 is a plan view thereof.

i 8 is a fragmentary side view of a portion of the adjustable standard support.`

Fig. 9 is a fragmentary face view thereof. Fig. l0 is a fragmentary detail, partly in section, showing the centering means. l

Throughout the several figures of the drawings l have employed the samey charactei'` of reference to. indicate similar parts.

19,22*. serial Noj55a5e5.

Those familiar with the ordinary straightening press will at roncefobserve in the drawings certain unfamiliar features which constitute improvements requiring specific ef;- planation as to structure and operation. However, lthe general features of a Vtypical straightening press will be noted, comprisi391 fed by @Proms Springs and plunger-s z,

Figs. 2 and 10. Y

The bracket @and shaft g, which has longitudinal, adjustment, within. said becker. both are resiliently supported by means lof the cable j spring j', while the-height of said bracket isregulated by means rofthe adjusting screw zf, Y Two supportingy arms are adjustably mounted upon the shaft g, between which theworkor part undergoing the straightenf ing operation is supported above the bed and blocks c of the straightening press. One of these arms Ze is show-n in Figs. l and 5 with some detail; each of which is equipped with a centering pin 7c and supporting rollers Z3 in paired relation. The. opposing pins la or the paired sets 4of rollers Ze" are provided for alternatively supporting theworky accurately in the straightening press; thelatter preferably being nsed. forv rapidMi-nsertion and removal of the work or. for shafts which are too long to ybe supported,Y betweenthe centering pins, or arey not provided withl their own recessed centers. j y j y .A gage l, lcalibrated for measurementsto the thousandths ioffan inch, and orf"vvell knowntype, yis pivotally mount-ed onthe gage-stem Z .intermediately of bracket L, and-.s adapted t0 'be depressed with tsstem resting menge-gement with j the worlnjkjas: Shows in Fie. l;7 or, when released@ Screw ZG. the .Stem and' ses@ 1 W;1. 1-be s clear of the work' and thrgnstblock Shawn in .Fs-

Elilarsd defalsotthe gage mounting may be 'considered by refer ring` to Figs.' Gand 7, y ,j

`With the fereseas structural. features borne in mind, anexplanation of thefadvang aune' which is terminally VsurTA in its intermediate position, as shown'in 33S set.

spring the work sufficiently to clear the thrusttages and operation ofn my improved straightening press may be readily understood. In Fig. l, for example. I have shown a four-cylinder crank shaft??? in position upon the press and held between the centering pins in the well-known manner, for the purpose of accurately straightening this somewhat unwieldy member. Obviously, a shaft or other part of proper length might be held in working position by the same means; the limits as to length being defined by the adjustment permitted the arms upon the shaft g.

However, it is frequently :found necessary in shop practice to straigl'iten much longer shafts or parts, and for this purpose particularly I have equipped each arm l# with the paired `and accurately trued supporting rollers /e.` A shaft fn, of workable length materially exceeding the length of the grooved shaft g may be supported for the purpose of straightening it by resting said shaft upon the rollers It, as shown in Fig. 2. This permits themost expeditious positioning and removal of the work with respect to the straightening press.

Returning to a consideration of the showing of Fig. l, the operation of straightening the crank shaft after positioning` it between `the centering `pins may now be briefly eX- plained; The bracket It is adjusted as to heightso that the ends of the crank shaft will clear the blocks 0 and permit the rotation of said shaft, whereupon the stem of gage Z is depressed into engagement with the flexed intermediate portion of shaft m where it is held by set-screw Z. The shaft is then slowly turned over by the operative who will note the deection of the gage needle or pointer and place a chalk mark on the high spotor flexed area of 'the shaft` The set screw is then released and the ZV immediately frees the gage from block for the straightening operation.

Screwe is then rotated by the graduated gage-wheel d sufficiently to engage the thrust-block j with shaft m at its chalked position. `The operative may then use the lever o which is equipped with a clutch o and release 0 for flexing the shaft sufficiently to straighten it. This operation is dependent to a considerable extent upon the judgment and experience of the operative, guided, as he is, by the reading of gage `Z.

. 'Vhen he has/flexed the shaft m, which is brought into supporting engagement with the blocks cupon the initial depression of the vthrust-block*f, the operative will note the gaging `figure, as 1:25, 'upon handwheel (Z which is turned to the forward position, and thereupon he will release the clutch and actuate the thrustblock upwardly by its screw in" order to free shaft m.

The resilient mounting of bracket L will serve slightly to elevate the work above the supporting blocks c; spring y" being adjustably tensioned for this purpose in order to counterbalance the supported. weight by means of the nut j, Fig. 2. Gage Z is then adjusted with its stem engaging shaft m and the deflection, if any, is determined once more, as above explained, and the straightening operation is repeated as often as required to bring the shaft into accurate alinement at the area or location acted upon by the press.

However, it is the common experience with shaft of any length to find that they are flexed in various portions of their length and thereby unfitted for running true. Accordingly, another important feature of my improvement, and one that is quite essential to the operation of a straight-.i ening press and associated apparatus of this type, is the provision of means for permitting the shaft to be operated upon throughout its length and withoutremoving it from the device.

It will be observed that shaft g is ,mounted within the bracket 7i. by means of rollers 7b', 71.,the former preferably engaging the groove in said shaft for preventing its rota.- tion.y while rendering it freely movable in a longitudinal direction. Thus the shaft m under treatment may be moved to the left or right `and carefully gaged and straightened as before, until the entire crank shaft is alined within the desired limits of aclUU curacy. It `is apparent that `a straight shaft, countershaft or other member may be subjected to the straightening operation, just explained, and if such member has no accurately defined centers, or is too long to be supported between the centering pins, such shaft may be accurately positioned between the opposing rolls 7n, as indicated in Fig. 2. i i i Another feature present in the improved apparatus of my invention is the resiliently` held centering rod e' which, being terminally positioned between the opposing spring pressed plungers i (Fig. 10), serves the purpose of .pern'iitting the work to tilt slightly from the horizontal in being brought to place uponthe supporting-blocks of the press, whereby a. shaft having unequal terminale or of varying diameters at its ends may be readily straightened without adjusting blocks of different heights upon the bed of the press;

In making the successive tlexures of the straightened shaft the crcumferentially gaged hand-wheel is of extremeadvantage in that the position of the thrust-block may be accurately determined at the beginning and conclusion of each successive step of the straightening operation, so that the opertive may determine roughly 119W mufh the shaft is flexed veach time, merely by sighting the forward ligure or intern'iediate spacing with the axis of the screw. 'ihe pitch vof said screw heilig known, of course, it'v is easy to determine the depression of the thrustblock at each'successive step.

The operating lever opreferably'is provvided with a reversible clutch 0 actuated by the plunger 0., whereby the screw c may be powerfully turned in either direction for straightening or releasing the workin hand upon the bed of the prees, and while carried by the work-supporting unit into its various positions required for perfecting the straightening operation. Accordingly, the work is moet expeditiously and accurately handled without removal from the press and within limits defined by the thousandth of an inch.

Haring now described an embodiment of my invention and the novel method of straightening shafts and. the like, l desire to claim and secure by Letters Patent, together with such modifications in method and means as may be suggested by ordinary skill in the art, the following:

l. A work-holding appliance and gage for straightening presses and the like, comprising an adjustable support for the member to be operatedupon by the press, means for accurately gaging the work, and a depressible resilient support adapted normally to permit the ready rotation of said member, substantially asset forth.

2. ln combination with a straighteningV press, an associated work-holding appliance, comprising an adjustable support adapted accurately to position the wont, a vresilient supporting means therefor permitting the ready rotation of the work, a finely-calibrated gage, and an adjustable mounting therefor permit-ting said gage to be actuated into and out of operative relation vwith the work, substantially as set forth.

3. In a work-holding appliance for presses and the like, the combination with a bracket, of a mounting resili-ently positioning it with respect to the press, a work-holding support, a longitudinally adjustable mounting therefor upon the bracket, and gaging means associated with said bracket.,l whereby the work may be intermittently tested without removing it from the working position upon the press, substantially as set forth.

4. In a work-holding appliance for presses and the like, a unitary attachment for association with the press, comprising a resiliently mounted bracket, a shaft sliding longitudinally therein, spaced supporting mounted upon the shaft, means upon vsaid arms for accurately positioning the work and permitting its rotation, vand a gaging appliance for testing the work from time to time, substantially as set forth.

5. In combination with a straightening arms press, an 4as'seciated ,work-holding appliance porting arms adapted to receive and accurately position the work while permitting -its rotation, depressible'resilient supporting vmeans, ,andV means adapted to ltest the work intermittently without removing it from the Lpr'ess or support, substantially as set, forth;

6. In ycombination with a straightening press provided with a gaged actuating handwlieel and opposed 'supporting-blocks, an

:associated work-holding ',f-iupport adapted vto fposition the work normally adjacent to the supporting-blocks of `the press, a resilient connection between the press and said support, and a gage adapted to be intermittently associated with the work without removing it from the press, substantially as set forth.

7. ln a work-holding ap-pliance straightening presses and the like, the combination with supporting mechanism for thetwork adapted to positionit above the bed1 of the press, of ar resilient mounting y for said mechanism, and centering means resiliently positioning' said mechanism with respect to the horizontal plane of the press, substantially Vas set forth. f

8. The. herein described method of operating a straightening press, comprisingV the resilient support ofthe work slightly above the blocks ofl said press in position for ready `rotation` the repeated gaging of thev work w ile mounted in position for straightening by thepress without .removal of Vthe work,

and the repeated treatment of said work in depressed position upon the blocks in accordance with the indicati-ons of the gage, substantially as set forth.

9. In, a `stra-ightening means for shafts and the like, a carriage for rotatably supporting the shaft, a plunger, and a pair of anvils normally located on opposite sides of the shaft and out of contact therewith, the plunger operating to lower the carriage and force the shaft against the anvils.

l0. In a straightening inea-ns for shafts andthe like, a carriage for rotatively supporting the shaft, a plunger, and a pair of anvils normally located on opposite sides of the shaft and out of contact therewith, theplunger operating to lower the carriage and force the shaft against the anvils, and a centricity of the shaft.

y 11. ln a straightening means for shafts and the like, a carriage for `rot-atively supniicrometric indicator for indicating the ec-A port-iiig the shaft, an adjustable plunger, and t :i pair of anvils normally located on opposite sides ofthe shaft and out of contact therewith, the plunger operating to lower VVthel carriage and force the shaft aga-inst the ani'ils.

'12.111 a straightening means for shafts for and the like, a carriage for rotatiyely supporting the shaft, an adjustable plunger, and a pair of anvls vnormally located on opposite sides of the shaft and out of contact therewith, the plunger operating to lower i the carriage and force the shaft against the anvils, and a shock absorbing means connected to the carriage.

13. In a straightening means for shafts and the like, a carriage for rotatively sup-V nected to the carriage and actuated on the movement oi the plunger towards and. on

the movement of the plunger in the directionV away from the shaft.

14;"In combination with a straightening press, an associated Work-holding appliance,

comprising a supporting member, means for permitting its longitudinal adjustment, two spaced supporting arms carried by said member, and paired opposing rollers freely rotatable upon each arm and adapted accurately'to position and rotatably hold the Work, substantially as set forth.

In testimony whereof l do now signature. i

BERNARD P. SCHILTZ.

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