US1621471A - Valve seating and aligning tool - Google Patents

Description

1 621 471 March 7' 0,6. SIMMONS VALVE SEATING AND ALIGNING TOOL Filed Sept. 9. Jags s she ts-s eet 1 i V Mm 1 621 471 March 15, 1927. o. G SIMMONS :v

I VALVE SEATING AND ALIGNING TOOL v Filed Sept.' 9. 1926 :5 Sheets-Sheet 2 arch Y o. G. SIMMONS VALVE SEATING AND A'LIGNING TOOL Y v Filed Sept. 9. 1926 s Sheets-Sheet s INVENTOR.

Patented Mar, 15, 1 927 UNITED STATES "PATENT OFFICE.

OLIVER G. SIMMONS, OF LAKEWOOD, OHIO, ASSIGNOR TO THE NATIONAL TOOL COM- PANY, OF CLEVELAND, OHIO.

VALVE SEATING AND ALIGNING TOOL. I

Application filed September 9, 1926. Serial No. 184,492.

My invention relates to improved means for reaming the valve stem holes and valve seat in alignment therewith in the cylinder blocks or cylinder heads of internal combus tion engines. I

The main object of the invention resides in the means provided for guiding the valve seat reaming cutter in perfect alignment with the valve stem reamer. 7

Another object of theinvention is to pro-- vide a valve stem reamer, of tool steel, preferably high speed steel, and fixedly secure it to a body portion of less expensive low carbon machine steel;

A further object of the invention is to pro vide the aligning portion in the form of a port cutter and the 'chamfering cutter, detachably secured to the body portion, to re move excess metal from the valve seat surface, adapting a valve seating cutter in a subsequent opgration to be detachably secured to the the valve seat.

A .still further object of this invention is to provide a pin detachably secured to the body portion, adapting this valve seating and aligning tool to be manually operated to recondition cylinder blocks and cylinder heads in service stations.

Heretofore in valve seating .tools of this character it has been the practice to provide a valve stem reamer and a valve seating cutter with no special means for aligning the valve seating cutter with the valve stem reamer, with a result that when a cylinder.

block or cylinder head was reconditioned in a service station, by a manually operated tool of the character referred to, the, valve seating reamer was invariably sprung and produced an elongated valve seat with consequent leakage from the combustion chamher and a consequent reduction of power due to the inefficient operation of the motor.

The valve port aligning cutter of the pres ent invention, therefore, serves as a guide for the valve cutter, and a valve seat reconditioned by the manually operated tool of the present invention, produces concentric valve seats and a consequent eflicient operation of the motor, since no gases during the combustionperiod are permitted to escape from the cylinder. a

With the above and other objects in view the invention comprises broadly the valve aligning feature, obtained by the structure dy portion adapted.- to ream illustrated in the accompanying drawings hereinafter described and particularly set forth in the appended claim, together with .and a valve chamfering cutter detached therefrom.

Fig. 2, is a view in elevation of the valve 1 seating cutter. v,

V Fig. 3, is a bottom view of the valve seat-. ing cutter shown in Fig. 2. In this view the teeth of the valve reamer are clearly seen to be unevenly spaced.

Fig. 4, is a view in elevation of the chamfering cutter.

Fig. 5, is a bottom view showing the teeth of the chamfering cutter, of Fig. 4.

Fig. 6,. is a fragmentary portion of the valve aligning tool showing the valve stem reamer, the port aligning cutter and the valve seat cutter. v

Fig. 7 is an end view of Fig.- 6.

Fig. 8, is similar to Fig. 6, except in this view the chamfering cutter has been substituted for the valve seating cutter.

Fig. 9, is an end view of Fig. 8. f

Fig. 10, is a view in elevation, partly in section, of the valve seating and aligning tool as it appears when inserted in a cylinder block, after all operations have been completed to ream. the valve stem hole and finish ream the valve seat. The aligning feature of this manually operated tool is shown in the form of a port cutter and clearly illustrates its aligning feature, maintainingconcentricity between the valve-seat reamer and the .valve stem reamer shown in the fragmentary section of the valve seat of the cyllnder block. 7

Fig. '11 is a fragmentary section of the valve seat of the cylinder block illustrating the form roduced by the chamfering cutter and its re ation to the valve seat of the cylin der block.

Fig.v 12 is a fragmentary sectional view of the valve seat of the cylinder .block as it would appear after the chamfering cutter had operated and cut away the valve seat. The body portion. 1, is provided with the detachablestem 2, shown. The lower 'poring the valve stem reamer. This is shown tion 3 of the body portion 1 is tapered and is provided with detachable pins 4-.- and 5 for a purpose to be later described. In the tapered portion 3 of the body 1, a hole' 6 is provided, adapting an end portion of the reamer 7 to be firmly secured to said body portion 1, for example, by shrinking the end portion of reamer 7 into the hole in tapered portion 3; thus the body portion 1 may be made of inexpensive low carbon machine steel and the reamer portion 7 may be made of high speed steel or of high carbon tool steel.

The port cutter member 8 is provided with a tapered hole 9 and a milled slot 10, adapting said port cutter to fit the tapered end 3 and the pin 5; the pin 5 'fitting into the milled slot 10, so that as the stem .2 is grasped by the operator to rotate same the port cutter'member 8 will be rotated with it. v The port cutter 8 is provided with teeth 11, chamfered slightly on the front edge, as shown at 12, to provide a cutting edge. The body portion proper, however, is concentrically ground with the taper hole 9, thus as the edge 12 is rotated in the direction of the arrow 13 and a slight pressure'exerted in the direction of the arrow 14, the port cutter 8 will remove metal in the upper part of the cylinder block and the concentrically ground feature of the body portion of said cutter will serve to guide. it truly in a concentric path, with respect to the teeth 15 of the valve stem reamer 7.

Referring to Fig. 4, the chamferin'g cuttei 16 is provided with the teeth 17, tapered hole 18 and milled slot 19, adapting it to be detachably secured to the tapered portion 3 of the body portion 1. To place this chamfering tool on the body portion 3, it is necessary toremove the port cutter 8 and the pin 5. These are easily removed by means of a slight blow from a wooden mallet, and the chamfering cutter inserted, the milled slot 19 being lined up and adapted to receive the pin 4, after which the pin 5 is inserted and the port cutter placed in position shown.

The valve seat cutter 20 is shown in Fig. 2. This is provided with milled slot 21, tapered hole 22, adapting this cutter to fit the tapered portion 3, and pin 4 in a manner similar to chamfering cutter 16. The teeth 23 of the valve cutter 20 are unevenly spaced as shown in Fig. 3, so that as the valve seat cutter 20 is rotated, the teeth being unevenly spaced, chatter will not result and therefore insures a smooth seat for the valve.

The lower portion 24,- of the valve stem reamer 7 indicates that the teeth are not milled clear to the end of same. This lower portion 24: is ground concentric a few thousandths smaller in diameter than the diameter of the portion of the teeth 15, so'that the stem-24 will serve as a guide when enterin Figs' 1 and 8. In Figs. 6 and 10, however, the teeth 15 are "milled-clear to the end 25 of the valve stem reamer 7. This is done to provide, chip clearance-when an oversize valve is to be used and when the reamer is designed this way, .015 inch of metal is usually removed for the reason that oversize valve stems are made substantially .015 inch over the size of the valve stem originally furnished with the motor and if the teeth were not cut clear through to'the end 25, thechips would pack up and'niake the tool inoperative. Figs. 6 and 10, therefore, illustrate the tool when adapted to be used for oversize valves, whereas Figs. 1 and 8 illustrate the reamer for use with standard valve stem as furnished originally with the motor.

F ig. 6 shows the set-up of the valve cutter 20 in place, whereas Fi 8 shows the assembly of the chamfering cutter 16, the method of application having been previously described. 1

In the use of the tool the following procedure is followed:v

Chamfering'cutter I6 is placed as shown in Fig. 8. The port cutter 8 in position, the operator inserts the reamer portion 7 in the hole of the valve stem portion 26,

as previously described exerting slight pressure in the direction of the arrow 14. This will cause the reamer to workits way into the valve hole until port cutter 8 reaches see Fig. 10, and begins to rotate the tool the point 27, Fig. 12, when it will begin to cut and remove metal from the surface 28 of the port hole. Theport cutter 8 being concentrically ground will seat itself as shown in Fig. 10, and will, therefore, act

as a guide to maintain alignment for the chamfering cutter 16 which chamfers the surface 29 as shown in Fig. 12. After this operation the valve seat cutter 20 is inserted, as shown in Fig. 6, and the tool again entered into the valve stem hole, as shown in Fig. 10, and operated as previously described to cut the valve seat portion 30, as

shown in Fig. 11. It is important that the width W, Fig. 11, of the valve seat be substan-tially the same in all cylinders and this is made possible by virtue of the chamferin cutter 16 previously described.

l laving thus described my invention, I claim:

In a valve seating tool, body portion provided with a valve stem reamer cutter, a

detachable chamfering cutter and a vdetachable port cutter interposed between the cutters aforesaid, said port cutter being concentrically'ground and serving as a guide to maintain alignment between said chainfering cutter and said valve stem reamer cutter.

Signed this 7th day of September, 1926.

OLIVER G. SIMMONS.

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