US1632621A - Drill sharpener - Google Patents

Description

l June 14, 1927.

1,632,621 A. E. PETERS DRILL SHARPENER Filed Dec. 1'7, 1925 2 Sheets-Sh'eet l INVENTOR.

BY 5M June 14 1927.-

A. E PETERS DRILL SHARPENER Filed Dec. 17, 1925 2 Sheets-Sheet 2 Lil INVEN TOR. Artku 21E, BfGZJ.

. HIS A71 "EX Patented June 14, 1927.

UNITED AT-E PA E FF ARTHUR 1:. PETERS, or rmmm rcoeoaam; Assrenort To Increment-RAND GOM- i rANY,or JERSEY CITY, NEW JERSESLA conroRArIon or ew JERSEY.

DRILL sHARrENEn.

Application filed December 17,1925; Serial No. 76 007.

This invention relates to drill sharpeners,

but moreparticul'arly to a guidingmeansfor a drill sharpenerm The objects of he invention are to insure alignment of ,thecrosshead with respect to the anvil block; to impart rigidity to sharp Other objects will enersof this type andto reduce friction between the relatively movable surfaces of the 'sharpener.

in part pointed out hereina ter.- I Theinvention consists of the combinations of elements, features of construction, and

arrangement of parts having the general mode of operation substantially as hereinaft'er described and more particularly pointed outin the appended claims and illustrated in the accompanying drawings, in which- Figure 1 is an elevation'partly broken zo'away illustrating the manner in which the @a hollow base B having formed integrally therewith a raising cylinder C. The-upper;

I posts hold the'piston and the crosshead' in spacedrelation with respect to each other, Figure is an elevation. partly broken away showing the manner in which the crosshead is held in alignment withthe anvil block, and r i Figure 3 a transverse view taken through FigureiQ on the line 3-3 looking 3 in the direction'of the arrows.

Referring to the drawing, indicated generally-by A is provided with end of the base Bis in'this instance pro- 'vided with a lateral flange'D which supports an anvil block E; The anvil block E may 1 be secured to the base B in any suitable man- 'finer, as for instance by bolts F, and has formed integrally therewith'a clamping cylinderG. 'Within the cylinder G is arranged a reciprocatory piston H'which carries at its lower side a reduced extension'in the form of a piston J which reciprocates Within the raising c linder C. 7 Secure atone end to the piston 11 in any suitable manner are a" pair of main posts K located on a diameter extending through the longitudinal axis of the ma chine. These posts extend slidably through sleeves L fitted in the anvilblock E and support at their outer ends a cross head 0.

The inner ends or heads G of the posts abut the piston H and are located as shown within the clamping cylinder G. The outer ends of the posts K are preferably screw threadart obvious and the sharpener ed as at P to receive suitable nuts Qwhereby the cross head O is clamped securely against shoulders R on the posts K: By

less readily accessible portion-of the machineg's 1 Y The admission Il -S. Patent N o. 1,501,918for sharpener for drill steels, granted July 22,1924, to my self and Mortimer S. Parkhill,

of'pressure fluid to the raising cylinder. C and the clampingcylinder I G is preferably controlled by a l common controlling means such as that disclosed in Accord- I (iii ingly, a valve chest S is securedto theside chest S is arranged asuitable valve (not of the anvil block Within the valve shown) 'operativelyconnectedlwit h a lever T whereby the valve may be nianuallyfac- -tuated for controlling the admission of pressure fluid to the cylinders andthe exhaust of pressure fluid therefrom in the manner descrlbedin theaforesaid patent. i 1

In adjacent faces U andVwf the anvil block E and thecross head 0 respectively areformed recesses or sockets TV and X forlthe reception of forming dies Y' and Z.

v.The forming dies Y and Zillustratedinthe drawings are in this instance adapted for forming thefiared portion or bit end of a drill steel and are held in interlocking engagement with the anvil block and the cross head by means ofbolts b. The sockets W and'X arepreferably formed intermediate the ends of the faces U and V, If desired, additional sockets may he formed in the :faces U and Vf, as for instance sockets c and 61 formed near corresponding ends of the anvil block E and the crosshead '0 respec .tively for the reception of the shearing knives e and f, orfor other similar devices.

Means are provided for forming the cut ting bit on drill steels after-the flared bit end has been formed on the steel. -To this end a cylinder 9 is preferablyfsecured-on one side of the anvil block E at right angles to the diametric line of the main posts and coaxially with the die Y. The cylinder g is providedwith a suitable hammer piston' (not shown) adapted to deliver blows on a forming dolly it supported by a fronthead j and extends into thecylinder g to receive the blows of the hammer piston in said cylinder.

block In accordance with the present invention, a pair of holes are formed in the anvil block E and preferably on corresponding sides of the posts K and in line therewith and substantially at right angles to the diameter on which the posts K are located. \Vithin the holes is are arranged guiding columns 0 provided with annular grooves p on that portion which extends into the holes 70. Pins 9 in this instance extend transversely through the anvil block E and cooperate with the annular grooves p for preventing endwise movement of said columns. The

said guiding columns o are supported in the sharpener.- By means of these columns,- the cross head 0 will at-all times be held in alignment with the anvil block E and the posts K will at all times be protected against undue strains to whichthey would ordinarily be subjected when the cross headO descends on the article being formed.

Heretofore, inmachines of this type, continued side thrust to which the posts K, or

their equivalent, are constantly subjected, caused considerable wear on the posts and on the parts through which they reciprocate.

- Such-side thrust is, of course, more severe when the machine is being used for forming or. sharpening than when it is used merely as a vise for clamping the drill steel during the sharpening operation.- Owing to the wear thus caused on the reciprocatory parts of the machine, the cross head at times tends to tilt somewhat, thus making it diliicult to properly form the drillsteel or other article. By means of the present invention, however, such side thrust against the posts is greatly minimized, the postsand cooperative parts will be protected against wear,-

and in consequence will render satisfactory service for a considerably longer period of time than will similar parts in machines unprovided with this feature.

I claim:

1. In a drill sharpener, the-combination of a clampingcylinder, a piston reciprocating in said cylinder, a stationaryanvil block,

two posts secured to the piston and located on a diameter extendrngthrough the longiwith the anvil block and side thrust and tilting of the cross head under impact is prevented.

2. In a drill sharpener, the combination oi a clamping cylinder, a piston to reciprocate in said cylinder, an anvil block integral with theeylinder and 'lorn'iing ahead tor one end of the cylinder, a cross head, a pair oi posts for holding the cross head and the piston in spaced relation with respect to each other, said posts being slidable through the anvil block, a pair of guide columns seated at one end in the anvil block and extending slidably through the cross head for insuring alignment of the cross head with the anvil block, recesses in the anvil block and cross head located between the posts and guiding columns for'holding dies,'and pins through the anvilblock to cooperate with the guide columns for holding said columns against endwise movement.

3. In a drill sharpener, the combination of a base having a flange, a raising cylinder integral with said base, an anvil block having a clamping cylinder supported on said flange, a piston in said clamping cylinder having a reduced extension in said raising cylinder, a movable cross head above said anvil block, two main posts having their lower ends secured tothe clamping piston and passing through the anvil block, the

upper ends being secured to the cross head,

said posts being located on a diameter extending through the longitudinal axis of the machine, a dollying device mounted at right angles to the diamctric line of the said main posts, two guiding columns for the cross head supported in the anvil block at that side of the anvil block adjacent the dollying device and located on lines substantially at right angles to the diametric lines passing through the axes of the main posts, and recesses in the anvil block and cross head located between the posts and guiding colunms for holding dies, whereby the cross head is heldin aligmnent with the anvil block and side thrust and tilting of the cross head under impact of the forging operations is prevented.

In testimony whereof I have signed this specification.

ARTHUR E. PETERS.

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