US1397960A - Rock-drill-sharpening device - Google Patents

Description

J. H. HINES.

ROCK DRILL SHARPENING DEVICE.

APPLICATION FILED MAR. 2B. I9I9.

1 ,397,960. Patented Nov. 22, 1921.

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er AVMC 1. H. HINES.

ROCK DRILL SHARPENING DEVICE.

APPLICATION man MAR.28,1919.

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A TTURNEYSv J. H. HINES.

ROCK DRILL SHARPENING DEVICE.

APPLICATION FILED MAR. 28. 1919.

1,397,960, PandNov. 22,1921.

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1 H MINES ROCK DRILL SHARPENiNG DEVICE.

APPLICATION FlLED MAR.28,1919. 1,397,960. Patented Nov. 22, 1921.

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ROCK DRILL SHRPENING DEVICE.

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ROCK DRILL SHARPEMNG ofvlcs.

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A TTOHNEYS UNITED STATES JOSEYH H. HINES, OF AUBURN, CALIFORNIA.

ROCK-DRILL-SHARPENIN G DEVICE.

Application led March 28, 1919.

T 0 all whom t may concern.'

Be it known that I, Josemi H. HINES, a citizen of the United States. and a resident of Auburn, in the county of Placer and State of California, have invented certain new and useful Improvements in Rock-Drill- Sharpening Devices, of which the following is a specification.

My invention relates to improvements in rock drill sharpening machines, and it consists in the constructions, combinations and arrangements herein described and claimed.

The foremost object of my invention is to provide a machine having convertible mechanisms therein and operated preferably by compressed air, for collaring a rock drill, or for shaping and sharpening the cutting point.

A further object of the invention is to provide in a machine for sharpening rocl drills, a novel arrangement in the drill gripping jaws, enabling the reversal of the jaws for the purposes of collaring a rock drill in one position and sharpeningr the rock drill when in another position.

Another object of the invention is to provide a. combination of a hammer and rock drill holding means, of such arrangement that the exhaust from the hammer will clear the worlr of dust.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings in which:

Figure 1 is a side elevation of the improved pneumatic rock drill sharpenin means,

Fig. 9. is a plan view of the machine,

Fig. 3 is a detail perspective view of one end of the upsetting and sharpening hammer.

Figs. L1 and 5 are detail perspective views of dollies respectively used in shaping four and six point drills,

Fig. 6 is a detail perspective view ofthe locking pin for holding the dollies in place on the hammer head,

7 is a perspective view of the drill gripping dogs or jaws,

Specification of Letters Patent.

Patented Nov. 22, 1921.

Serial No. 285,808.

Fig. 8 is a detail perspective view of the olllaring block, the die holder being thrown ac r,

Fig. 9 is a vertical section of the vertical or initial shaping hammer,

Fig. 10 is a detail view of the stationary air feeding core for the reciprocating hammer in Fig. 9.

Fig. 11 is a plan view of the bed plate of the machine,

Fig. 12 is a horizontal section of the adjustable pneumatic hammer, taken substantially on the line 12-12 of Fig. 1,

Fig. 13 is a detail cross section taken substantially on the line 13-*13 of Fig. 1 and illustrating more particularly the gripping j aw actuating pistons,

Fig. 14 is a detail view of the pedal actuated valve mechanism,

Fig. 15 is a detail section of the main air valve shown in Fig. 1,

Fig. 16 is a central longitudinal vertical section of the machine taken substantially on the line 2 2 of Fig. 2,

Fig. 17 is a detail cross section on the line 17--17 of Fig. 16,

Fig. 18 is a detail cross section on line 18-18 of Fig. 16, and

Fig. 19 is a detail perspective view of a completed rock drill.

In carrying out my invention, I provide a base or bed plate 1 having the general appearance shown in Fig. 11, which shows a plan view of the bed plate with the various mechanisms that it carries, removed. In Fig. 1, this bed plate is shown to include a pedestal 2 with a base 3 which is secured in any desired position and in any desired manner.

Formed with the bed plate 1 and included as a part thereof, is an extension or hammer table 4, upon which the pneumatic collaring and sharpening hammer 5 is adjustably mounted. This hammer is movable toward and from the work by means of a suitable feed screw 6 which has a swivel connection 7 to the hammer, and is actuated by a crank 8 on the end.

The hammer 5 which is referred to above in a normally in a collective sense, comprises a cylinder of suitable design and dimensions, in which the striking plunger 9 reciprocates and strikes the end 10 ot the hammer head 11. As will be observed in Fig. 12, the plunger 9 has an arrangement ot longitudinal and circumferential grooves 12 which are for the purpose ofso conducting the compressed air admitted at the hose connection 13,A that the plunger is properly reciprocated when the air circulates through certain of the grooves and certain coacting vports in the hammer casing. .So far-,as the manner of operating the plunger is concerned, that is to say, so far as the arrangement of the grooves is concerned, any desired formation may be employed, the whole purpose being to actuate the plunger' of the hammer by compressed air.

A spring 14 housed in a .counter-bore 15 in the lett end of the hammer casing 5, encircles Aa bushing 16 in which the hammer head 11 is located. The hammer head has a pin or pins 17 which engage a slot or slots 18 in the bushing 16 and serveto keep the hammer head from turning. These pins also `provide an abutment forone end of the spring 14 and thus the hammer head is kept retracted position in the bore of the bushing.

fThe hammer casing 5 is adjustable to various predetermined positions on the table 4 as already stated, and capable of being iixed in such adjustments by suitable fastening means 19 which pass through a suitable opening 20 adjacent to one of the guides 21 in which the hammer casing slides. Forr this purpose, the hammer casing has flanges 22. These occupy the guides, cause the hammer casing to preserve a correct relationship to the other parts ot the mechanism and prevent undue vibration of the hammer when in operation.

A recess or opening 23 in the hammer head 11 provides for theinsertion of the stem oit a striker 24. This striker is used in collaring a rock drill, in the manner to be explained later. Either one of a pair ot dollies 25 in Figs. 4 and 5 can be inserted in the hammer head by removing the locking pin` 26 in Fig. 6, the dollies being used only in sharpening a drill.

This pin occupies a transverse opening 27 in the hammer head andin the stem of the striker or dolly, depending on. `which is in place. 'A spring arm 28 included in the locking pin engages `a depression 29 on the exposed end of the hammer head and serves to assist in holding the pin 26 in position. The pin is removable by simply lifting the end of the spring and pulling the pin out.

The rock drill is tightly gripped and held Y in position to be operated on, by a pair of gripping dogs or jaws 30. These are pivoted together @t 31 hLve suitably shaped rejawk holder 34 of .the bed plate so that the concave portions come opposite to the hammer head and the otherwise at faces of the jaws come next to the hammer. This providesa square abutment against which a collar is formed.

A partition 35 defines one'side of the j awA holder,and this partition has a recess 36 with a flared portion, which makes room tor a projecting part'oi1 the rock drill. A collarr ing block 37 islixed in place in the block holder 38 of the bed plate, by Vmeans ot a clip 39 which reaches beneath the bed plate as shown. The clip 39 is easily unloosened to enable removing the collaring block presently described, so that a dolly in the hammer mayreach the end of a drill inserted for sharpening.

A die holder 40 is hinged at 41 in the base portion`42 of the collaring block.Y This die holder has an opening 43 in which a die 44, is loosely mounted in the opening. This loosemounting is obtained by means of a pin 45 which extends into a slot 46 in the die, permitting a certain amount of necessary reciprocating motion of the die in the act of hammering thereon.

The thickness of the partition 35 is just enough to gage the thickness of the collar on the rock drill, when a` properly heated drill stem is clamped in position by the jaws and the pneumatic hammer operates thereon after having been properly brought into position. Under such circumstances, the end of the rock drill'projects into the die 44, and when the striker 24 of the hammer head 11 strikes against the exposed end of the die as shown in Fig. 1, the end of the drill stem isV reduced to the properform and a collar is formed thereon by upsetting portions thereof into the'recess 36.

Abutments 47 in the jaw holder V34 cooperate with ribs 48V on the Vjaws 30y in assisting the pin 31 in keeping the jaws in place. To this end it is vto be observed that the pin 31 is long enough to extend through a suitable opening 49 in the partition 35, and the pin is also fitted into a co-,axially arranged opening in the head 50 oit the jaw holder. This latter opening comes beneath the recess 51 which is occupied by the drill stem when in position to be operated on.

Vhen the jaws 30 are Yclosed the ribs 48 project beneath the abutments 47 and thus effectively prevent the jaws from riding up.

When it is desired to remove the jaws in order to reverse them for the sharpening operation presently to be described, they can be readily taken out by partly opening them, when the ribs retract from beneath the abut ments.

A compressed air cylinder 52 contains a pair of opposed pistons 53 with rods 54 extending through the heads 55 of the cylinder. These pistons are normally kept in the central position by means of springs 56 as clearly shown in Fig. 13. A valve 5T controls the admission of compressed air from the compressed air supply hose 5S which leads to the connection 59 at the bottom of the casing 60 of the valve.

The exposed ends of the rods 54 have yokes 61 which are ample enough to admit the levers 62 oi the jaws 30. A suitable pin 63 bridges the ends of the yokes. Then the pedal 64 is depressed by the operator, the suitably arranged interconnected link devices 65 turn the valve 5T 900 to t-he left in Fig. 15, until the port of t-he valve establishes communication between the cylinder 52 and the connection 59. Normally this port opens the cylinder to atmosphere through the exhaust elbow 66.

Compressed air being admitted to the cylinder 52 between the pistons 53, the pistons are driven apart so that a powerful clamping action is exerted on the rock drill by virtue of the jaws 30. The operator then opens a valve 67 in the hose connection 13 and starts the pneumatic hammer which was previously adjusted in the proper position.

Dust or sand plates 68 are fitted on the jaw .holder 34. rlhese partly cover the aw and also cover the apertures 69 in the sides, through which the levers of the aws project.

Before continuing the description o't' the structure, there is one important feature that should be explained at this time. The hammer casing 5 is so arranged that the exhaust air is discharged at the front at the opening 70. The air thus discharged strikes the adjacent parts of the partition 35 when the collaring block has been removed to enable a drill sharpening operation, and serves to blow away any dust or dirt that may tend to accumulate, thus keeping the work clean.

A hose connection 71, suit-ably joined at T2 to a part of the compressed air connection associated with the valve 57, leads to a place beneath the recess 51 in the head 50 of the jaw holder 34. This connection is valved as shown and the hose serves as a blow out for the jaw holder 34.

A standard 73 supports the vertically disposed initial shaping hammer 74. As shown in Fig. 9` this hammer includes the reciprocating plunger 75 into which an air conducting core 7 6 extends. This arrangement is merely incidental to the whole invention, but it is to be observed that the core 7 6 has a mounting 77 which is suitably fixed in place on top, and includes a suitable connection 78 to which the valve compressed air connection 79 is joined.

In its other aspects this hammer is very much like the hammer 5. It includes a hammer head 80, with a retracting spring 81, pin and slot connections 82, and has a shaping member 83, by means ot which fourpoint drills are initially shaped by laying the ends on the anvil 84.

In construction, the anvil 84 includes a. stem 85 which extends through an opening 86 in the bed plate and is suitably secured in place beneath. The anvil includes an extension 87 which extends in tar enough toward the head 50 to bind against the bent end 88 of the pin 31 in Figs. 2 and 7, to keep the pin from slipping out.

Vertical adjustments of the hammer T 4 are made by means similar tov the screw 6 in Fig. 1. In operation, the drill D is laid in place substantially as shown in Fig. 1, with one end supported on the anvil 84 and the other end on the rack 89. The hammer 74 is then operated to initially shape the cutting end of the drill.

The rack 89 includes arms 90 which are pivoted to the pedestal 2, and has a support 91 which is fitted in a hole 92 in the base 3 when the rack is in its raised position. The rack can be slightly lowered by removing the support from the hole and moving it back again.

The manner of collaring a rock drill has already been fully brought out. lVhen it is desired to sharpen rock drills, the gripping dogs 30 are taken out and turned around so that the concavity comes next to the hammer. moved by unloosening and taking oit the clip 39. One of the dollies 25 is substituted for the striker 24 in the horizontal hammer, and the end oi the drill gripped in the now reversed dogs 30 is acted on by the horizontal hammer to sharpen the point ot the drill.

It will doubtless'be readily understood from the foregoing description that theapparatus can be used either Yfor collaring a rock drill or for sharpening the cutting I point. In the Jformer instance, the collaring block 42 is employed, the gripping aws 30 being' turned so that the fiat vertical wall comes next to the die 44. 'Ihe striker 24 operating against the die 44, causes the formation of the collar illustrated in Fig. 19.

lVhen it is desired to sharpen the rock drill D in Fig. 19, the jaws 30 are turned around so that the concavity 33 comes next to the hammer, the collaring block 42 being removed so that a suitable dolly 25 inserted in the hammer in place of the striker 24, may perform the sharpening operation. The reader will understand that the sharpened end of the drill is driven in to lill the con- The collaring block 37 is recavity 33 and thus Vform the shape cl illustrated in Fig. 19.

W'hile the construction and arrangement of the rock drill sharpening machine as herein described and claimed is that of a.

generally preferred form, obviously modifiping meansfrom riding up during the operation of the aforesaid acting means.

2. A jaw holder, drill gripping jaws occupying said holder, associated hammer mechanism for acting onA the end of thedrill gripped by said jaws, and mutually em- .bodied means providing suitable abutments between the jaws and the jaw holder, preventing the displacement of the jaws out ot the holder during the operation of the hammer mechanism.

3. A'jawholder, a 'pair oli-gripping jaws occupying the holder, hinge connections for the jaws including a pin passing through adjacent parts of the holder to retain the jaws while opening and shutting them, cooperating hammer mechanism for acting on the end of a drill gripped by the jaws, and means mutually embodied in the jaws and holder coperating with said hinge pin in preventing the displacement of the jaws during the operation of the hammer mechanism.

4. The combination of a jaw holder, removable and reversible jaws occupyimq` the holder, and hinge connections for the jaws including a removable pin passing through adjacent parts of the holder and they jaws to retain them in either the normal or reversed positions in the holder.

5. A jaw holder including suitably-disposed ribs, hinged drill gripping jaws occupying the holder and provided with cooperating abutments, and pneumatically operated means operatively associated with portions of said jaws to :torce them into the closed position, whereupon the abutments move beneath the ribs and prevent the jaws from vertical displacement.

6. A jaw holder including ribs, drill gripping jaws occupying the holder, including abutments associated with the ribs, aneumatically operated means operatively associated with parts of the jaws to close them and move the abutments beneath the ribs to prevent vertical displacement, and hinge connections between the jaws, including a pin mounted in the holder, retaining the jaws when moved to the open position.

Y 7, In a rock drill Sharpening machine, a

base including a jaw holder, drill gripping jaws hinged together and mounted inthe holder, abutments on the jaws, associated y ribs on'the holder, lever arms carried by the l mechanism, supported on said base with said pneumatically actuated mechanism, for controlling the operation of said mechanism.

9. In a rock drill sharpening machine, a base including a jaw holder with openings andV adjacent ribs, drill gripping jaws 'located in said holder, including levers extending through saidopenings; means hinging the jaws together and to the holder, in-

cluding a pin passing through the jaws and holder, pneumatic jaw actuated means, including cylinder and piston devices mounted on the base with suit-able connections to said levers, and pedal actuated air valve -mechanism for controlling the operation of said pneumatically actuated means. Y

' 10.."Instrumentalities for collaring a roch drill, comprising a jaw holder having a partition with a suitably shaped recess, drill gripping jaws located in the holder with a companion concave portion, and an opera-V tively associated hammer for acting on the end of a drill gripped by the aws to expand a portion of the drill into said recess and concave portion to form a collar thereon.

1l. The structure of claim l0, further provided with a suitably mounted die interposed between the partition and hammer for shaping the end of the drill adjacent to the collar.

12. In a rock drill sharpening machine, a base including a aw holder with a recessed partition, drill gripping jaws occupying the holder at one side of the partition, a collaring block mounted on the base at the other side of the partition, a `die carried by the bloclr, and a hammer for acting on the end l of the die to shape the end of a drill gripped by the jaws and form a collar 0n the drill in the recess of said partition.

13. The combination, of jawsfor gripjiing ia drill in position to be acted on, a collaring block with a drill end-forming die located in Jfront of the jaws, and a pneumatic hammer adjustable with respet to said block.

14:. Instrumentalities in aV roch drill sharpening machine, for'either sharpening or collaring a drill; comprising reversible ,gripping jaws with a drill recess flared at one side, a hammer `including a head arranged to receive a dolly for sharpening a drill when gripped by the jaws when positioned with the flared portion remote from the hammer, and a collaring block with a forming die, insertible between the jaws and hammer, when the jaws are positioned with the flared portion adjacent the hammer and the dolly is replaced by a striker.

15. A rock drill sharpening machine, comprising a bed plate with a jaw holderl including ribs and a recessed partition, guides included in the bed plate, a pneumatic hammer in sliding engagement with the guides, and including means for adjusting the hammer therein, drill gripping jaws hinged together and to the holder, including abutments cooperating with the ribs to prevent the aws from moving upwardly; pedal-controlled pneumatic operating mechanism for actuating the jaws, and a collaring block with a hingedly mounted and movable die, interposed between said partition and hammer, for forming a collar on a drill gripped by the jaws, in the recess of said partition, by the action of the hammer on said die.

16. A pair of drill gripping jaws including levers, instrumentalities operatively associated with said levers and being capable of being rendered active to move the levers and close the jaws, and means embodied in said instrumentalities causing the reverse movement of the levers and automatic opening of the aws when said instrumentalities are again rendered inactive.

17. A jaw holder, drill gripping jaws mounted in said holder and including levers, pneumatieally operated means in operative connection with the levers tor moving the jaws to the gripping position, and means embodied in said pneumatically operated means for reversely moving the levers and jaws upon the release of pressure. 18. A bed plate including a jaw holder, a pair of drill gripping jaws occupying the holder, hinge connections for the jaws including a hinge pin passing through the holder and jaws, with an exposed end; and an anvil removably mounted on the bed plate, including a portion for engaging the exposed end of the pin to keep it in place.

19. A bed plate including a jaw holder, jaws occupying the holder, hinge connections for the jaws including a pin passing through the holder and jaws, with a bent end exposed at one side to Jfacilitate removal of the pin; and a removable anvil mounted on the bed plate, including a portion bearing against the bent end to normally retain the pin.

20. A collaring block, a die holder pivotally mounted thereon, and a die reciprocatably but non-rotatably mounted in the holder.

21. The combination, of a support with a hammer adjustably mounted thereon, a collaring block attachable to the support in front of the hammer, and a die to be struck by the hammer, reciprocatably but non-rotatably mounted in the part of said block.

22. A bed plate, a collaring block attachable and removable from the bed plate, including laterally extended portions, a die holder hingedly mounted on the block, a die carried by the holder embodying means permitting' reciprocatable but not rotatable movement ot the die; and means embracing a portion of the bed plate with Jfastenings to said-extensions fapable ot being unloosened for the removal ot said block.

3. The combination, of a bed plate including guides, a pneumatic hammer casing with means for adjusting it in said guides, a hammer head included in said hammer, arranged to interchangeably receive a sharpening dolly or striker', and a collar-ing block including means embracing the bed plate and holding the block in position when a striker is applied to the hammer head, said block including a reciprocatable but nonrotatable die arranged to be struck by the striker; the aforesaid means enabling the removal of the collaring block when a dolly is applied to the hammer head.

24:. A bed plate including a jaw holder with a head and partition having drill recesses, gripping jaws occupying the holder,

with lever arms extending therethrough; means applied to the holder and jaws forming a pivotal mounting therefor, pneumatically operated means for actuating the jaws, including a cylinder supported on the bed plate, with oppositely moving pistons in operative connection with the lever arms, means coperating with the pistons for automatically returning them upon the release or" pressure, and means applied to the aforesaid head and partition at the sides ot the drill recess to retain the jaws and partially exclude dirt.

25. The combination, of al fluid pressure cylinder, a pair of drill gripping jaws with lever arms, a pair of opposed pistons in the cylinder movable apart by fluid pressure, piston rods including yoke connections to the lever arms, and means cooperating with the pistons for returning them to normal position upon the release of pressure.

26. The combination, ot' a piston rod having a yoke, a pin extending across the open end of the yoke, defining an inclosure, and a gripping aw lever arm extending into said inclosure.

27. 1n a drill sharpening machine, a pneumatic hammer including a hammer head with a central opening and a depression on `theentsidean insertiljle striker, and a pin A with a'resilient element litting in the depression to prevent the. displacement of the pin.

2S. In a drill sharpening machine, a bed plate including a standard at one side, a veltically disposed hammer Carried by the standard, including` a shaping tool; a co- 10 operating anvil beneath the hammer and ing on the anvil7 including lan adjustable rack. v

JOSEPH H. HINES.v

Witnesses: RAGLAN TUTTLE,

A. W. BEERMAN;

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