US2020812A - Boring machine - Google Patents

Description

Nov. '12, 1935. TURNER ET AL 2,020,812.

BORING MACHINE Filed May 15, 1933 2 Sheets-Sheet 1 3 J k 3 1. 1 xx t: \:I I

Nov. 12,1935. W TURNER HAL 2,020,812

BORING MACHINE Filed May 15, 1955 2 Sheets-Sheet 2 Patented Nov. 12, 1935 UNITED STATES BORING MACHINE John W. Turner, Houston, and Edwin H. Bruchmiller, Kilgore, Tex.

Application May 13, 1933, Serial No. 670,836

1 Claim.

This invention relates to a boring machine.

An object of the invention is to provide a machine specially designed for the purpose of reaming tapering seats or tapering bores and the like.

A particular object of the invention is to provide a machine of the character described which has been specially adapted for use in reaming out the seats of slush pump, so that a snug fit will be obtained for the pump valve mechanism.

The material around the valve mechanism of slush pumps soon becomes out out by the gritty fluid handled by the pump so that there will be a passage between the seat of the valve mechanism and the seat of the pump, wherein said valve mechanism is located, thus causing leakage and in such case the valve mechanism must be removed and the pump seat reamed out and formed smooth so as to provide a perfect fit with the seat of the Valve mechanism when reinstalled.

It is an object of this invention to provide a reamer of such construction that this work may be done without dismantling the pump.

Another object of the invention is to provide a reaming machine of the character described of such construction, that any desired taper may be given to the work.

A further object is to provide a reaming machine of the character described which is portable and which may be readily applied to repair work of a pump without disconnecting the pump or removing the pump from its location.

This is specially advantageous in the case of pumps connected into a well drilling rig equipment.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figure 1 shows a side elevation of the complete machine.

Figure 2 shows an inside View of the chuck.

Figure 3 shows a sectional view taken on the line 3-3 of Figure 2.

Figure 4 shows a vertical sectional view, taken on the line 44 of Figure 1.

Figure 5 shows a horizontal sectional view taken on the line 5-5 of Figure 1.

Figure 6 shows a horizontal sectional view taken on the line 66 of Figure 1, and

Figure 7 shows a fragmentary side view of the spindle employed.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral l designates the base of the framework, upstanding from which are the legs 2, 3, 3. At the upper ends of these legs is a head plate 4. The parts of the framework above described are 5 preferably welded together forming a unit. The head plate 4 has a central bearing 5 in which the gland 6 is mounted to rotate. oppositely arranged set screws l, i are threaded through the head plate on opposite sides and their inner ends 10 project into an annular groove 3 around said gland whereby the gland is secured against detachment but permitted to rotate.

There is a tubular driving shaft 9 terminating at its outer end in ahead it? and around said driv- '15 ing shaft 9 there is an externally threaded sleeve II. A series of anti-friction spacer rings 5? surrounds the shaft 9 and are interposed between the head [6 and the opposing end of the sleeve H. The sleeve II is threaded through the nut 20 I3 which has external spaced annular flanges M, l5 thereon on the former of which the base plate I is bolted. The lower end of the nut 53 is externally tapered and is split longitudinally as more accurately shown in Figure l and an ad-26 justing ring I8 is threaded thereon.

Mounted on the upper end of the sleeve I l and keyed thereto there is a screw gear H which is in mesh with and driven by the worm gear I8. This worm gear is keyed on the shaft l9, which rotates 30 in the transversely aligned bearings 20, 2| formed integrally with the supporting plate 22. This plate has a bearing to receive the upper end of the sleeve 1 l and said sleeve has an external annular flange 23 which supports the plate 22 and35 said plate is provided with an end notch 25 in which the leg 2 fits, whereby the plate 22 is maintained against turning. The outer end of the shaft l9 has a hand wheel 25 whereby the shaft I9 may be rotated and the sleeve 1! l fed longitu- 40 dinally through the nut l3. The shaft 9 extends outwardly beyond the outer end of the sleeve II and splined thereon is a bevel gear 26. The gear 26 is mounted on a supporting plate 27 through which the shaft 9 extends and interposed between 45 the plate 21 and the upper end of the sleeve H is a suitable wear ring 28. There is a bevel pinion 29, fixed on the inner end of a shaft 38 which shaft is mounted to rotate in a bearing 3| which upstands from the extended end of the plate 21 50 and is located between the legs 3, 3 whereby said plate 21 is maintained against turning. Around the shaft 9 on the bevel gear 26 there is a wear ring 32 and on said wear ring 32 there is a tubular housing 33 which surrounds the upper end of the 55 shaft 9. Threaded onto the upper end of the shaft 9 there is an annular nut 34 and between this nut and the upper end of the housing 33 there is a wear ring 35.

' Fitted snugly within the shaft 9 and extending through and beyond the head ll) there is a spindle 36 and detachably secured to the inner end of said spindle there is a reduced stem 3'! which works through the gland 6 and is secured to said gland by means of a transverse cotter key 38 which is fitted through a bearing in said gland and through one of several longitudinally aligned bearings 39 through said stem.

In case the seat 53 for the valve mechanism of the pump M, should become out out by the gritty fluid so as to leak, the cap closing the opening 42, of the pump, above the valve mechanism may be removed and a suitable adapter 33 located in said opening 42. The reamer may then be inserted through the adapter with its lower flange l5 seated in an inside annular recess in the top of the adapter. Hold down clamps 44, d4 may then have their inner ends placed on the flange l5 and their outer ends supported on the blocks 45 with the pump cap bolts' iti extending through bearings in said clamps and the nuts 41 may then be screwed up tightly against the clamps whereby the reamer will be securely held in place.

A tool holder 53 is fitted slidably through the head til so as to be movable transversely and one end of this tool holder has a bearing 49 to receive the bit 58 which may be clamped therein by the set screw 3!. A longitudinal half round section of the lower end of the spindle 36 has been removed to provide a flat bearing face 52 against which the guide plate 53 fits. The inner end of this guide plate is pivoted to the spindle on the set bolt 54 and the outer end of the guide plate has a transverse slot 55 cut therethrough and the bolt 56 is fitted through said slot and screwed into the spindle. On the guide plate 53 there is a diagonal guide rib 51. One side of the tool holder is cut out forming an elongated notch 58 to provide space for the spindle and within this notch and mounted to swivel in the chuck there is a guide bearing member 59 having the transverse groove 56 which receives the rib 5?. The guide plate 53 may be adjusted to the pitch desired to be given to the reamed out seat 33. In applying the reamer to the work the stem 36 may be adjusted to its desired relation with the shaft 9, and such relation maintained by the key 38 and the head iii may be adjusted to the desired'point of adjustment relative to the sleeve I l by using the required number of spacer rings l2 for that purpose, said adjustment being necessary to bring the bit 53 to the desired Working location and the plate 53 may be adjusted for pitch. A crank 6| may then be applied to the outer end of the shaft 3E! and said shaft rotated which, in turn will operate through the gearing 30, 23 to rotate the shaft 9 and the head In.

to gradually feed the bit to the work through the mechanism above described. The shaft 9 and the spindle 36 will rotate simultaneously but said spindle will be held against longitudinal movement relative to the frame work and as the head It and the tool holder carried thereby move downwardly, that is, as the bit 50 is fed to the work, said tool holder will also gradually move laterally in accordance with the pitch of the rib 51 so that the bit will ream out a tapered seat having the same pitch as the pitch given to said guide rib to the end that the seat 40 will be reamed out smooth and with the proper taper to receive the seat of the valve mechanism of the pump.

It is obvious that this type of boring machine may be applied to the work of tapering slush pump seats and other similar heavy machinery by merely removing the pump cap over the valve to be repaired and without dismantling or removing the pump from its location. i

The drawings and description disclose what is now considered to be a preferred form of the invention by way of illustration only while the broad principle of the invention will be defined by the appended claim.

What we claim is:

A boring machine comprising a frame, a spindle rotatable on the frame, a tubular driving shaft around and longitudinally movable with respect to the spindle, means for rotating said shaft and spindle, a head on the shaft, a tool holder fitted slidably through the head and movable transversely with respect to said head, one end of said tool holder having a recess, a bit clamped in said recess, the lower end of said spindle being provided with a flat bearing face, a guide plate, fitted against said face, the inner end of said plate being pivotally mounted, and the outer end of the plate having a transverse slot therethrough, a clamp bolt fitted through said slot and screwed into the spindle, said guide plate having a swiveling connection with the chuck, said plate and spindle being provided, one with a groove diagonal relative to the axis of the shaft and the other with a rib received by said groove and means for moving the shaft longitudinally with respect to the spindle to feed the bit to the work.

,55 JOHN W. TURNER. EDWIN H. BRUCHMILLER.

Simultaneously the 5 shaft l9 may also be turned which will operate

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