US1098474A - Machine for making and sharpening rock-drills and for general forging. - Google Patents

Description

0. BROWN. MACHINE FOR. MAKING AND SHARPENING ROCK DRILLS AND FOR GENERAL FORGING. APPLICATION FILED AUG. 2, 1909.

1,098,474, Patented June 2, 1914,

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0. BROWN. MACHINE FOR MAKING AND SHARPENING ROCK DRILLS AND FOR GENERAL FORGING.

' APPLICATION FILED AUG. 2, 1909.

1,098,474, A Patented June 2, 1914..

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INVENTOR. CARY. BRO/40V,

0. BROWN. MACHINE FOR MAKING AND SHARPENING ROCK DRILLSAND FOR GENERAL FORGING.

' APPLICATION FILED AUG.2, 1909. 1,098,474.

Patented June 2, 1914.

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UNITED STATES CARL BROWN, 01? DENVER, COLORADO,

PATENT OFFICE.

ASSIGNO-R TO THE CHAMPION FORGING MACHINE COMPANY, A CORPORATION OF COLORADO.

MACHINE FOR. MAKING AND SHARPENING ROCK-DBILLS AND FOR GENERAL FORGING.

To all whom may concern Be it known that I, CARL Brown, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented new and useful Improvements in Machines for Making and Sharpening Rock-Drills and for General Forging, of which the following, together with the accompanying drawings, consti' tutes a full, clear, and exact specification.

This invention relates to that class of machines in which dies or other tools are mounted in a suitable framework with means for operating said tools, and adapted to form the drill-bits or simply drills used in rock drilling and for other forges for which it is adaptable.

The object of my invention is to provide simple, and efficient means for eliminating skilled hand work in the making of new drills and in the sharpening of used drills; also, to provide means for doing a variety of general forging which is in constant demand around a mine or quarry. In attaining the object mentioned a separate tool is provided for each successive step in the forming of the drills, and these tools are mounted in a rotatable carrier which is here inafter referred to as the tool wheel.

The tool wheel is placed at an angle, preferably a right angle, with the line of action of the hammer and is rotatably pivoted on a shaft, the tools being centered on a circular line around the wheel axis and concentric with it, so that they may be revolved around this axis and be brought consecutively into position between a suitable hammer and an anvil, the latter being heavy enough to absorbthe force of the blows struck by the hammer.

The hammer and anvil are preferably mounted on the same framework with the tool wheel, which latter is rotated by hand and when the desired tool is in alinement with the hammer and the anvil, the wheel is locked in position, leaving the tool ready for operation.

In the drawings, Figures 1, 2 and 8, are respectively, plan, front, elevation and end elevation of the entire machine. Fig. 1 is a section 011 line M, Fig. 2, and Fig. 5, is a perspective detail view showing a modilication of a minor part of the machine. Figs. 6 and 7 are enlarged detail views of one particular set of dies, Fig. 6 being partly Specification of Letters Patent.

Application filed August 2, 1909.

Patented June 2, 1914.

Serial No. 510,950.

in section on line 6-6, Fig. 7, and Fig. 7 being partly in section on line 7-7, Fig. 6. Figs. 8, 9, 9 10, 11 and 12 are enlarged perspective detail views, showing the operations of, and methods of using, some of the tools.

In all the different figures the same parts are designated by the same reference charactors.

The machine consists of the frame (1), upon which is mounted the overhanging shaft (2), the latter pivotally supporting the tool wheel (3*), which is made up of the circular disks and (8), connected to each other by cross bolts (41) passing through separators l Eleven different tools are shown mounted in (3*), which comprise the following: (12 (12 cut ting 01f dies; (18) (13 splitting dies; (14?) (la opening dies; (15) (15 gaging dies; (16 (16 bevel-cutting dies; (17) (17 sharpening dies; (18) (18 swage dies; (19), a dolly; (20) (20"), spoon dies; (21), a straight face an yil; and (22), an anvil with beveledoffset "ace.

Those tools which consist principally of two parts a relatively stationary one, and a relatively movable one, I choose to refer to as dies. The stationary parts of the dies are fastened in sleeves (3 extending outward from (3 while the movable parts have a limited reciprocating sliding motion in sleeves (3 extending outward from (3). On the frame (1), to one side of the tool wheel, is the hammer (5), sliding in guides (5 and adapted to be reciprocated by any suitable means, but preferably by steam or air acting upon a piston in the cylinder (6), the latter being fitted with the usual inlet and exhaust pipes, (not shown). On the opposite side of the tool wheel, and in line with (5) is an abutment block (7), carrying the movable anvil (9). Abutment block (7 is bolted to frame (1) and notches (3 are cut in the periphery of (3) to engage the stop (8), when the corresponding tool is centered in working position between (5) and (9), and (8) is prevented from slipping out accidentally by pin (8). Block (7 ),is preferably made of cast iron and has extending length wise across its front face, a recess (7 the use of which will presently be made clear.

'A dovetailed groove (7 extends across that side face of (7), nearest engaging a corresponding dovetail (7), on the anvil (9). By means of the lever (10), and link (10), may be pushed back, clear of the recess (7), the purpose of which will appear hereinafter. Dotted lines in Figs. 1 and show the position of (9), (10) and (10 when (9) is pushed back as above stated. The link (10), is forked at each end, one end being pivoted to (10), while the other end straddles and is pivotally connected to, an eye-bolt (9), fastened in the bottom of (9).

All the tools used in this machine excepting the aging dies (15), bevel-cutting dies (16) (16 and the sharpening dies (17) (17), as well as a part of the splitting dies (13) (13), are in everyday use by blacksmiths, in some form or another, and they constitute a part of the present invention only so far as their means of operation is concerned. a

The gaging dies, bevel-cutting dies and sharpening dies are entirely new, but as each one forms the subject of a separate application for United States patent, all bearing even date herewith, the reader is referred to those applications for detailed descriptions thereof. The general mode of construction is the same in all the remaining dies, the differences being in the sizes and shapes of the working face; therefore, the detail sections (Figs. 6 and 7) of the cutting-off dies will suflice to illustrate the operating mechanism of the swage dies, the splitting dies, the opening dies and of the spoon dies. The last four dies named above, have their working faces illustrated, respectively, in Figs. 8, 9, 10 and 12. These figures show in dotted lines the foremost and rearmost position, as the case may be, of the movable parts of the dies.

Referring to Figs. 6 and 7 which show (12), in the closed and open positions respectively, (12 is the stationary part of the cutting dies and is held in the sleeve (3), by the bolt (12). The movable part (12), slides in sleeve (3), and is arranged to be driven forward against the work and toward the opposite die by blows from the hammer (5). The spring (12), acting between the bolt (3 and pin (12), retracts (12) when the pressure thereon, exerted by (5), is withdrawn. (12) has its motion in the barrel (12), and (12) is slotted longitudinally at (12), to clear (3). Bolt (3 forms a stop for (12) against the rearward pressure exerted by (12). In Fig. 6, (23), shows a bar inthe position occupied when being operated upon.

In using any of the dies they are first positioned between (5) and (9); the steel, which has previously been heated to the required temperature, is inserted from the I front of the machine, as shown by the dotted oosen lines at (23) Fig. 1, the dies acting upon the steel sidewise. The operator has hold of the end of the steel projecting outside the machine, and the hammer (5), is then given the desired motion by the steam or air in the cylinder (6), controlled by valves with lever connections (not shown) brought within easy reach of the operator after the manner customary on ordinary steam ham mers. In this way it is possible to strike heavy or light blows, many or few, upon the movable parts of the dies, according to the judgment of the operator.

In making a new drill, after the steel has been cut to the required length by the cutting-0d dies, (see Figs. 1, 6 and 7), one end is inserted in the swage dies, to form the shank; the steel is then placed in the bed of the machine in the position as shown by the broken line (24), Figs. 1 and 2, with its shank inserted in the hole (25) in the tail block which latter is adjustable along the ratchet rail (26) for difierent lengths of drills, by means of a pawl (27), the steel extending through recess (7) in abutment block ('5), (the anvil having been pushed back) and through the slots (28) and (28 in the tool wheel (3*), the latter having first been swung into the proper position, so that the steel can be upset on the end opposite to the shank, by blows from Fig. 5 shows another device for adjusting the position of the tail block along the ratchet rail; (29), being a bail suitably pivoted on (25) and adapted to engage suitably formed notches in ratchet rail (26 After the steel has been upset, the beveledofiset anvil is used to properly shape the upset end to a uniform inverted taper. As shown in Fig. 11, (23), is a part of the steel resting with its end in the beveled-offset of (22) and in position to receive blows directly from the hammer (5), dotted lines indicating the path traveled by the latter. The straight face (22) Fig. 11, forms a stop for (5), and by slowly turning the steel in this position, its end is formed into an inverted cone having a more or less regular, circular, cross-section at every point. By gradually pulling the steel out of the beveled-ofiset in the direction indicated by arrow (23), and by continuing to turn it, the operator may forge it down to any required size. Next, the splitting dies are used to cut longitudinal slits along elements of the cone, as shown in Figs. 9 and 9*. Referring to these latter figures and to Fig. 3, (30), is a movable aw having a Vshaped opening across its face and working in guides (31), disposed in the tool wheel, between (3) and (3 Jaw (80) holds the end of the steel positively while it is being operated upon by cutters (13) and (13 at the same time causing the steel to be centered with the plane of action of the two cutters, and furthermore, preventing the steel from glancing out from between the cutters when these first contact the steel. A spring (32), under compression between the wheel shaft (2), and the said jaw, normally presses the latter against the stops (30 The steel of which the drill is being made is pushed into (30), Fi 9, by the operator and is thus held securely, while the hammer Figs.

(1) and (2) ,is allowed to strike (1.3),which forces the steel sidewise against (13 thus simultaneously cutting a slit 011 each of two opposite sides of the steel. The steel is then turned through right angle and two more slits are cut in the same manner. Fig. 9 shows the steel. in section after all four slits have been cut, and before (13) has been retracted. (18 and (13 may be of varying widths suited to the work, but when not wide enough to reach as far up on the cone as it may be required to cut the slits, then the steel is pushed more strongly against (30), the latter receding against (32), and the slit-cutting operation repeated.

From the splitting dies the bar is put into the opening dies, which latter simply spread open farther the longitudinal V-shaped slits made by the splitting dies and leaves the cross-section of "the drill, near the point, in the form of a Maltese cross. In Fig. 10 is shown, in section, a part of the steel after having been operated upon by the opening dies andbefore (14) has been retracted. The gaging dies are then used to flatten out the wings thus formed on the steel and at the same time to gage the thickness of the wings and the amount of their spread. The next step is the cutting of the bevels on the face of the drill, to form chisel edges. This is accomplished in the bevelcutting dies, which usually leave the drill in a finished condition. Should there, however, be any roughness or burs left on the drill, these may be taken off by sliding the tail block farther back on the rail (26), so that the face of the drill, when again placed in the bed of the machine, will come just adjacent to the face of the dolly (19), which with a few light taps from (5) finishes the drill.

The dolly is loosely held in the tool wheel by having its shank pass through corre sponding openings in (3) and (3 which are slightly larger than the cross-section of the shank of the dolly, thus allowing the dolly free longitudinal movement, so that it can be accommodated to small variations in lengths of the drills operated upon.

The sharpening of used drills is explained in the application for U. S. patent on sharpening dies for rock drills already referred to.

Fig. 12 shows the method of forming spoons, (33) representing the section of one of the latter while in the dies.

l ft will be noticed that in this machine the steel can be shaped by separate ha1nmerlike blows; that all the tools are at all times in perfect adjustment and ready for instant use, needing only a movement of the tool wheel to bring them into the working position; that there is only one ope 'ating cylinder for use on all the tools; and that the number of individual tools provided, is suilicient for all the steps in making or sharpening drills, thereby rendering any skilled hand work unnecessary.

l l hile drills of any shape may be made in this machine, the tools it contains are de signed with special reference to making those drills whose cross-section at and near the point is the well known cruciform.

Tn constructing this machine the parts must be so arranged that there shall not be too much clearance between the tools and the anvil (9) as it is intended that the force of the blows from the hammer shall be transmitted through the tools and work and be taken up finally bv the inertia of the abutment block (7), without throwing an undue strain upon the structure of the tool wheel nor upon the shaft carrying it. To reduce the vibration, in operating the machine, a Cam (3%) is provided, which is fixed on one end of a stub shaft (35), the latter having a handle (36) attached to its other end and located within easy reach of the operator. By means of the said cam working against the disk (8), any tool which may be in the proper position, can be clamped tightly against the anvil (9), and held there securely by a ratchet (37) adapted to engage the handle (36). Normally there is suflicient play between the wheel journal and the shaft to obviate any undue strain, so long; as the clearance above referred to, is not too great.

laving fully described my invention, what I claim new, is

1. In a drill-forging and sharpening machine, the combination with asuitable framework, of a pivotally mounted wheel, with forging tools, concentrically mounted in the said too]. wheel, with a power hammer placed upon one side of the planes of the tool wheel, and an anvil placed upon the opposite side of the planes of the said tool wheel, the combination being so arranged that any tool carried by the said tool wheel, may be brought with its line of action directly between and in alinelnent with the said power hammer and the said anvil, substantially as described.

2. In a drill forging and sharpening machine, the combination with a suitable framework, of a power hammer with an alined anvil, a tool wheel carried on a shaft, the shaft paralleling the line of action of the power hammer, with suitable tools mounted in the tool wheel, concentrically therewith,

the tool wheel being adapted to be rotated and bring consecutively each tool into an alined position with the said power hammer, and the said anvil, substantially as de scribed.

3. In a drill sharpening and forging machine, the combination with asuitable framework, of a tool wheel mounted on a shaft, with its axis approximately parallel to a bed arranged in the said framework, with a power hammer and an anvil in alinement with each other, both suitably mounted on the said bed and disposed on either side of the planes of the tool wheel, with tools having their lines of action generally perpendicular to the planes of the said tool wheel and adapted to be brought into alinement with and between the said power hammer and the anvil, and means for locking the tool wheel in position when any desired tool is in alinement with the power hammer and anvil, as specified.

4c. In a machine of the class described, a: j ournaled tool-wheel, tools suitably disposed around the axis of the tool-wheel, the lines. of action of the said tools being approxi-' mately parallel to the said tool-wheel axis;

a striking mechanism disposed on one side of the planes of the tool-wheel, with an anvil disposed on the opposite side of the said tool-wheel planes, and so placed that any or" the tools may be operably positioned between the said striking mechanism and the said anvil, substantially as described.

5. The combination with a ournaled wheel, of a plurality of suitable tools operably disposed in, and axially alined with, the said wheel, and means for operating the said tools.

6. The combination with a journaled wheel, of a plurality of suitable tools operably disposed in and axially paralleling the axis of the said wheel, means for operating any of the said tools at one side of the wheel, and a co acting abutment opposite said means at the opposite side of the wheel.

In testimony whereof, I have signedmy name to this specification in the presence of two subscribing witnesses.

CARL BROWN.

Witnesses P. H. MALLiNoKRoDT, IDA B. HAWLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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