US921986A - Metal-reducing machine. - Google Patents

Description

B. M. W. HANSON.

METAL REDUGING MACHINE.

APPLICATION FAILED 14.13.23, 190s.

Patented May 18, 1909.

2 SHEBTS-SHIQET 1.

B. M. W. HANSON.

METAL RBDUGING MACHINE.

APPLICATION FILED MAB.. 23, 1908.

921,986. 'Patented May 18, 1909.

S SHEET 2 JIP/Hanson fy/zzs Attori: cys,

:as co., wmsumam '1 p 5 State of Connecticut,

5 in the following description 55 geously used for the purpose.

BENGT M. W. HANSON, OF HARTFORD,

COMPANY, OF HARTFORD, CONNECTICUT, A

CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY CORPORATION OF NEW JERSEY.

IIIETAL-REDUCING MACHINE.

Application filed March 23, 1908.

T o all whom it may concern.'

Be it known that I, BENGT a citizen of the United States, residing at E of grinding Hartford, Hartford and have invented certain new and useful Improvements in Metal-Reducing Machines, of which the following is a specification.

.in the county of Specification of Letters Patent.

Patented May 18, 1909.

Serial No. 422,804.

the present case is supported by the slide 3 M. YV. HANSON, l while the tool which may be a suitable form device is supported by the slide 4. These slides may be of any suitable character so that a detailed them is not deemed necessary. It might be remarked, however, that during the action of the machine, the slide 4 moves in a plane at This invention relates to metal reducing an obtuse angle to the plane of movement machines.

A machine embodying my invention may be employed with utility in many different conneetions. I have found it of particular advantage in grinding tools having beveled cutting edges at an angle to each other. As a type of such a tool may be mentioned what is known as a fish-tai 7 cutter. kind of a device has four of such beveled edges or faces and it is one of the primary purposes of my invention to so organize the machine that these faces can be ground with precisionized accuracy. The machine possesses other advantageous points which with the foregoing will be set forth at length wherein is outlined that form of embodiment of the invention which I have selected for illustration in the drawings accompanying and forming a part of this specification.

Referring to said drawings, Figure 1 is a top plan view of a machine including my invention. Fig. 2 is a vertical section of a standard, and certain indexing and gage means sustained thereby, portions of said two means being in elevation. Fig. 3 is a transverse section. on

This l the line 3-3 Fig. 2.

Figs. 4 to 7 inclusive are diagrammatic views l showing the different positions of the cutter, etc., and all of which will he hereinafter more fully described. Fig. 8 is a face view of an index member, and a portion of the gage means, the latter being in dottedlines.

Like characters refer to like parts throughout the several figures.

The different parts of the machine may be carried upon any suitable framework; latter illustrated involves a base or bed as 2. On the said base or bed are mounted a plurality of carriers, with one of which the work is connected and with the other of which the working-tool is connected. These carriers are preferably movably mountedL and while they may be of any desirable nature slides as 3 and 4 may be advanta- The workin the as of the slide 3, this being for the purpose of securing the movement bodily of the grinding tool along angular paths relative to the axis of the work support. In the present case the slides are moved manually and any known means may be provided for this purpose. For instance a feed-screw as 5 (see dotted lines Fig. l) can be employed for reciprocating the slide 3, said screw being provided at its outer end with a hand-wheel as 6 to facilitate its being turned. The slide 4 may be operated by a hand-lever as 7 operatively connected therewith.

I have represented the slide 3 equipped with an upright or standard as 8. Through the upper portion of this standard 8 there is illustrated as extended a work-support which may consist of a spindle as 9. The spindle 9 is rotary for a urpose that will hereinafter appear, and it 1s represented as bored to receive the split-sleeve or divided bushing 1() into which the shank or body of the work fits. The shank of a fish-tail cutter is gen erally cylindrical and therefore the sleeve or bushing l() is of a corresponding internal shape. Through the forward end of the spindle 9 is tapped a screw as Il, the inner end of which is adapted to bind against said bushing or sleeve so as to cause the latter to tightly and firmly hold the cutter, blank or work in position during the grinding operation. It is therefore clear that the work or fish-tail cutter blank is solidly clamped in position and against movement relatively to its supporting spindle 9.

In conjunction with a work-support such 9 I provide an index member, and while this index member may be of any suitable kind, I find that a circular plate or disk as 12 is advantageous. The index member or disk 12 is in the present work support or spindle 9 and for this purpose it may be keyed or otherwise suitablyV fastened thereto; There is combined with this index member a stop and in like manner this stop may be of any suitable form; for

description of case rotative with the 'i different positions, and when a fish-tail cutter instance I have found a plunger as 13- as. meeting the necessary conditions. 'his plunger 13' is preferably yieldingly mounted itis shown as seated in a bore 14 in the standthe stop or plunger 13,'

ard 8 and as normally urged outward by a' coiled push-spring as 15 seated in said and the ends of which respectively bear against the bottom of the bore and the tail of the plunger. In the present case this index member is capable of occupying several is being' ground these positions will' be fol'ir 1n number as will' hereinafter appear. Said index member 12 and its the different adjusted positions thereof and assure also the correct angula'rpresenta'tion' bush-ing of the work to the koperating tool. ALs will hereinafter appear l d'o not rely upon guess# work or mere speculation to obtain a definite or precisioniz'ed relation between' the work and the index member of whatever' character thelatter may be, buit provide means of a positive nature to, obtain this important result so that the finished or ground fish' tail cutter will be precise in form.

VA fish tail cutter has in addition to' the shank to which I have referred, a head and it is the ylatter that has the fish-tail form. In Figs. 4 and 5 I have shown such a head, it being denoted by 16' and l'iaving inuit a Vfshaped notch or aperture 17, the walls of which are op'po'sitely inclined to each other; in fact the surfaces of these two' walls' in' a finished tool are at a right angle to eachother. When these walls or surfaces are ground down there will be produced as will be ebvious two cutting edges or portions. In action these two surfaces are ground in succession and afterward the outer or forward ends or tips of the two sides 18 and 19 o'f the flatheaded cutter ground along planes at right angles to' each other and of different pitch than the other angles. There are thereifo're four surfaces to be g'roimc'l ona blank and it is the office of the index member 12 in connection with its stop to obtain the correct angular presentation of the work or blank to the `g'rindir'lg tool. s

The index member 12 to adapt it to' the work set forth has four seats into which the stop or plunger is adapted to be' interchange` ably fitted, and these seatsmay consist of holes as 20, 21, 22v and 23 which are' arranged as will be evident in pairs, the holes 20 and 21 being complemental to leach other and the same applying to the holes 22 and 23. It will be seen that the holes of the two pairs are diametrically opposite to each other. y In grinding along the surfaces'y of the walls of the notch l17 the holes 20` and 21 are employed while for grinding the outer or tip' portions of the blankor work, theholes 2'2' and23 are used. Y The hole 2O'l is preferably initially` employed and the gage means to which I have bore cooperating stop invention the correct maintain the workesupport or spindle 9' iny tained' by hereinbefore briefly referred and which will be more fully alluded to hereinafter insures a definite relation between this hole 2O and in fact after the said gage means has performed its function all of the holes will be in a definite relation with the said stop. I might explain that in grind-- ing a cutter of the kind. referred to the same is presented atan angle to the grinding tool; this angle should always be uniform with respectto the relative tothe work-support. `"vflithout gage means such as that comprehend'ed by my angle cannot be obthe mere insertion of the shank of the fish-tail cutter blank into the sleeve or 10 or other'part which directly holds the work said gage means however assures the accuracy of said angle. Initially or prior to grinding the first surface of the blank the gage means is employed and after the definite relation between the index member andY its coacting stop is thus fixed' it is not necessary to' thereafter employ the said gage means'. Iii/hen ajsecond blank however is mounted in place, the gage means will be utilized. s

The index member or disk 12 may be ro= tated in any suitable manner, for example by a knob' as 24 fastened by a pin or otherwise to the outer end of the work-supporting spine dle 9.l When the' index member is turned the spindle 9 is rotated simultaneously there-v with. The power of the spring 15 is just sufficient to" prevent accidental turning movement of the index-member'12 although its stress is not enough to prevent free' turn'- ing of said index member by an operator or attendant of the machine. By turning the index member by hand the plunger 13 is caused to recede out of an opening or hole in which it may be' seated, and when the index member has been given the' requisite motion said plunger' .will be shot into another cfsai'd openings or holes by the power of its spring. Y

On the slide 1 is a suitable bearing as 25 and in the same is rotatively disposed a shaft as 26 to the inner end of which is repreV sented as attached a grinding wheel as 27 while to the outer end a band-wheel or pulley as 23may be fixed to rotate said shaft and thereby the Vgrinding tool carried thereby. The grinding tool is of frusto-conical or ta-A pered form peripherally.

The slide 4 has two different characters of movement, one a limited movement or when forth the means illustrated for accom lishine these results.

At this point I might state that when the grinding tool has bottomed against the notch or for instance when it encounters one wall of said notch after having ground the other wall thereof, it is necessary l 3 0 that further advancing motion of the slide 4 be positively arrested to prevent injury to the work or the cutting or nicking of the surface of said notch which is not then being ground.

Gn the bed or base mounted an endwise movable bolt 29 which constitutes a suitable limit stop for the slide 2 l have shown as l 4 and this stop cooperates with a stop as 222() on the slide, the stop 39 being shown as a screw tapped through the outer end of said l slide, the bore which receives said screw intersecting or being in communication with l that in which the stop-bolt 29 is fitted. lt I will be seen that these two stops are shown at right angles to each other. Should it be desired to limit the advancing movement of the slide 4 the bolt 29 is pushed inward and across the path of the screw 30 and when the screw strikes the bolt this will indicate to the operator to release the lever. As the screw is adjustable l can by its operation regulate the time or point of engagement between the same and the bolt to adapt the machine to effective operation upon different size blanks. By pulling the bolt back out of the path of movement of the screw as represented in Fig. 1 the advancin motion of the slide 4 will be not limited or the maximum feed of the said slide can be obtained.

l will now describe the gage means shown in the drawings. Said gage means includes in its make up a gage or finger as 31, the shank of which is extended upward through and is fastened in a hole or perforation in the outer end of the block 32. T his gage or iinger 31 has its lower end flat and at a desired angle to its longitudinal axis, the angle being such a one as will adapt the to the particular work to be donc. Said lower, flat end is adapted to engage one of the flat faces of the head of the work or blank. The block 32 is preferably adjustable vertically of a support or pin as 34 and in a bore in said block is fitted a friction shoe as 35. There is also located in said bore a push-spring as 36, acting against said shoe to constantly or at all with thc blank, the plunger 13 at this times force the same in an outward direction whereby said shoe is caused to engage the support or pin with a pressure sufficient to maintain the block in a vertically adjusted position. The block and gage carried thereby of course partake of therotary movement of the work support 9 and the index member 12 and they can be readily raised or lowered. to adapt them to the thickness of the work. llrhen the gage has exercised its function as such it can be swung back out of the way about the support or pin 34 as a pivot. (See Fig. 1).. The' gage. is shown as occupying` its operativo position in Figs. 2 and 8.

ln the operation of the machine, the slide 3 will if necessary be advanced to such a position as to cause the operation of the grinding wheel 27 upon the work, after which the l shank of the latter will be clamped in the split bushing or sleeve 10, thc slide 4 being at this time in its backward or retracted position. The block 32, if it be swung back out of the way, will now be moved forward into line with the spindle 9 and the lower flat edge or end of the 31 will be moved into contact upper fiat face of the head 16 of the time being in any one of the four holes 20, 21, aiu The simple solid engagement of the wor1 g or lower end of the gage puts the work into a definite angular relation with respect to the work support 9 and also of the index inember 12; the work therefore is primarily indexed with respect to the index member and in this way l. assure a certain or known relation between the work and the index member and precision in operation while the different angular faces are being ground. After the work and the work support or gage are adj usted relatively to each other by the use of the gage means, the work will be in readiness to have its first surface dressed off or ground. ln the present case the wall of the notch or aperture 17, on the left in Figs. 4 and 5 is first ground. Vf hen this wall is finished the spindle 9 is given one half turn so as to exactly reverse the position of the work. ln grind- 'ing the first wall of the two the plunger 13 will be in the hole 20. When the second surface is to be ground the index member 12 is turned so as to bring the opening 21 opposite the plunger 13 at which point the tip or forward end of said plunger is shot into said opening 21 by the power of the spring 15. The index member therefore in connection with its cooperating and relatively fixed stop assures the correct presentation successively of different lt will be evisurfaces to the grinding tool. dent that during the grinding of the two surfaces of the notch 17, the slide 3 is at rest and that the slide 4 is being reciprocated by hand, and that further the slide 4 has a limited forward stroke as previously set forth. ilhen the walls of the notch 17 are dressed down to the required extent, the bolt 29 will be retracted and the index member 12 will be turned to permit the projection of the outer end of the plunger 13 into the hole 22 to dress down one of the tip portions of the blank during which action the slide 4 is being reciprocated. TWhen this particular tip portion has been sufficiently ground, the index member 12 will be given a half turn at time the outer end of the plunger will be forced into the opening 23 to maintain the correct angular position between the work which and the grinding tool when the last of the sition of the tool with respect to the work in making; the inner and outer dresses or those along` the Walls of the notchA 1-7 and the tip portions 18 and 19 of the work.

As hereinbefore indicated one forni of embodiment oi the inventiony has been illustrated and described, this being toenable those skilledy in the'art to'practiee' the invention. As will be obvious my invention can be incorporated in different kinds of maehinery, but when embodiedin a metal WorkF ing or reducing machine it is not essential that the'work acted'upon'be a fish-tail cutter.

Vfhat I claim is:

1. In a machine of the elass described, a manually-operable slide having a stop, and a stop supported independently oi'l the first mentioned stop and movable into and out of the path of the latter.

2. In a machine of the class described, a

2 Oreeiprocatory slide', a= stop earried by said slide,. and a second stopfsupported independ#l ently of the iirst mentionedstop and movable into-and out of the path of the latter.

31. Inv a machine of the class described, al

slide, an adjustable stop carried by said slide, and a stopl supported independently of the iirst stopV and movable intol and out of the path of the latter.

4. In a machine of the class described, a slide, a screw adjustably carried by said slide and constituting a stop, and a bolt supported independently of the slide and movable into-

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