US2411545A

US2411545A - Honing tool

Info

Publication number: US2411545A
Application number: US472701A
Authority: US
Inventors: John E Kline
Original assignee: Micromatic Hone Corp
Current assignee: Micromatic Hone Corp
Priority date: 1943-01-18
Filing date: 1943-01-18
Publication date: 1946-11-26
Anticipated expiration: 1963-11-26

Description

NOV. 26, 1946. I J KLINE 2,411,545

' HQNING TOOL Filed Jan. 18, 1945 2 Sheets-Sheet 2 INVENTOR r of the single stone Patented Nov.- 26, 1946 UNITED STATE s PATENT OFFICE signor to Micromatic troit, Mich.,

I Application January 1 18 Claims. (01. 51-184A) This invention relates to honing tools, and particularly to a new and novel honing tool of the single stone type.

The present honing tool comprises a tubular body having a rotatable rod therein provided with a cam surface which engages the carrier for the stone for moving the stone outwardly of the axis of the body. As one means for rotating the cam, an axially movable element is mounted within the tube having engagement with the rotatable cam member for turning the member when the element is moved axially. The axially movable member is provided with a head which engages an adjusting element of a honing machine, and the body is secured to a flanged adapter by which the tool is supported in the machine.

The abrasive stone is mounted in a spring carrier which snaps over the end of the tubular body portion with the carrier in position to be engaged by thecam. The carrier portion engaging the cam is moved outwardly against the tension in the body-engaging portion thereof. This tension retains the stone against the cam and reduces the diameter of the tool when the cam is reversely rotated'to present a portion of reduced thickness to the carrier portion. The reaction to the radial force applied to the abrasive tool is taken at two spaced points at the opposite side of the carrier which extends beyond the body on either side of a flat provided thereon. Any wear which may occur to the carrier does not affect the life of the tool, since the carrier and the stone are the renewable portions thereof.

Accordingly, the main objects of the invention are: to provide a tool with a single stone mounted on a resilient carrier which retains the stone against the cam member and on the tool body, to provide a tool body with an outwardly movable stone which is involutely adjustable, relative tothe axis of the body, by a rotatable cam element; to construct a tool from a tubular body having a cam rod therein which is rotated by an axially movable member which is retained against rota tion relative to the body; toprovide a honing tool with a stone carrierfwhich encompasses the end portion of the body and provides spring-like retraction for the stone and abutments which take the reaction to the radial force 'appliedto the stone; and, in general, to provide a honing tool type which is simple in construction, positive of operation, and economical of manufacture.

,Other objects and features of novelty of this invention will be specifically pointed out orwili.

Hone Corporation, Dea corporation of Michigan s, 1943, Serial No. 472,701

. for the tool.

the carrier become'apparent, when referring, for a better understanding of the invention, to the following description, taken in conjunction with the accompanying drawings, wherein:

Figure 1 is a view in side elevation of a honing tool embodying features of this invention;

Fig. 2 is an enlarged sectional view of the tool illustrated in Fig. 1;

Fig. 3 is a view of structure, similar to that iilustrated in Fig. 1, with parts in section taken at an angle to the section of Fig. 2, as illustrated in Fig. 4 by the section line 3-3 thereof;

Fig. 4 is a sectional view of the structure illustrated in Fig. 2, taken on the line 4-4 thereof;

Fig. 5 is an end view of the structure illustrated in Fig. 2;

Fig. 6 is an enlarged broken top plan view of the stone end of the tool illustrated in Fig. 1;

Fig. '7 is a'sectional view of the structure illustrated in Fig. 6, taken on the line 1-! thereof with the stone in retracted position; and

Fig. 8is a view of structure similar to that illustrated in Fig. '7, with the stone shown in worn condition and in expanded relation to the tool body.

In the figures, the honing tool comprises a tubular body In having an aperture ll forming a bearing surface for the lower end of the cam rod l2. The cam rod I2 is axially secured to the body-portion by a pin l3 which projects within slots' l4 and IS in the upper end of the body portion, as illustrated more clearly in Fig. 4. A counter-bored portion l6 of the body receives the: tubular portion I! of the actuating element IB The tubular portion is provided with helical slots l9 and 2| which receive the pin i3 for rotating the cam rod l2 when the actuating element '18 is moved axially. The counter sunk portion [6 of the body [0 has a key slot 22 extending the length thereof for receiving a key 23 deflected from the tubular portion I! of the actuating element I8. This is illustrated more clearly in Fig. 3, and. is employed for the purpose of preventing the'relative rotation between the actuating element l8 and. the body II]. The pitch of the helix relative to the length of the actuating member I8 is such as to rotate the rod I2 from the position illustrated in Fig. '7, in which the cam permits the stone to retract fully, to that illustrated in Fig. 8, when the cam has expanded its maximum amount.

It will thus be seen that, when the actuating element 18 is moved axially, the adjusting rod I2 is rotated about its axis through the operation of the helical walls of the slots l9 and 2| which operate the pin i3 projecting through the cam rod l2. In the particular structure illustrated, the actuating element 18 is provided with a head 24 which engages the adjustable element of a honing machine which moves the elements axially. A flanged adapter 25 is attached to the body portion in by a set'screw 25, and is so constructed as to be positioned in the machine by the dowel 27 for supporting the tool in the machine. The machine rotates and reciprocates the tool in the usual manner, and superimposes a longitudinal movement to the actuating element I8 for adjusting the abrasive stone of the tool to either increase cr decrease its distance from the tool axis. In Fig. l, the tool supporting head of the machine 53, which is rotated and reciprocated, carries a sleeve 54 which receives the flange adapter- 25 of the tool having an aperture for receiving the dowel 21 thereof. The adapter is supported on the sleeve 54 by the flanged collar 52 which is threaded thereon. The head 24 of the actuating element. I81 is supported in a recess in a longitudinally adjustable element within the head 53 where it is retained by the locking ball 5| which engages a groove in the head 24. The head 24. is adjustable longitudinally of the body It), while the entire tool is rotated and reciprocated through the attachment of the adapter 25 on'the end of' the head. 53. which is rotated and reciprocated. For a further description of the machine and the supporting, adjusting and driving elements thereof, reference-may be had to the copending application of Douglas T. Peden, Serial No. 365,526, flledNovember 13, 1940, and assigned to the assignee of the present invention,

As illustrated in Figs. 5, 7, and 8, the end of the body portion H]. is cut away at 28 and provided with aflat portion 29 on the opposite side. A recess 31' is provided in the outer wall of the body for receiving the arcuate portions 32 of the stone carrier 33; the top end of which is flanged outwardly at 3.4 against which the honing stone 35 abuts. A tab 36'is struck upwardly from the carrier element 33 in parallel relation to the flange 34 for engaging the opposite side of the stone 35 from" that contacting the flange 34. Suitable adhesive material. is employed for securing the stone tothe web portion of the carrier between the flange 34 and the tab 36.

The arcuate portion 32 of the remaining arcuate portion of the tool body Within the recess 31- where it is retained against rotation by an inwardly directed flange 31 on its oppositev end. The end portion of the cam rod 12 iscut away to form a cam surface 33 which engages the web portion of the carrier on the opposite side from that to which the stone is securedfor moving the web portion of the carrier: and the stone outwardly of the axis of the tool body. Upon the reverse rotation of the rod, the spring tension in the carrier 33 returns the stone to its retracted position, as illustrated in Fig. 7-. In Fig. 8, the carrier is illustrated in maximum adjusted position, which occurs when the stone becomes Worn or a larger bore is being honed; After the stone ha Worn beyond useful thickness, the carrier and stone are removed as a unit, and it is only necessary to snap a new carrier' within the recess 3i in the body to have the tool ready for further operation.

It will be noted. that the'stone extends beyond the carrier to the end of the tool body In so that blind hole honing may be performed by the honing stone. The cut-away portion 29 is employed to relieve the body from any pressure which the carrier engages might occur to the carrier portion 32 diametrically opposite to the stone 35. The bearing of the carrier against the cylinder bore occurs on each side of the cut-away portions 29 at the points ii and 42. This stabilizes the stone and tool and prevents chatter because of the three-point contact obtained between the two points 4! and 42 andthe surface of the stone'35. Any wear which may occur to the carrier at these points will be insignificant, especially since the carrier is renewed when a stone is replaced on the tool. This eliminates any Wear on the tool body itself, so that the only expendable portion of the tool will be the carrier tfi'an'd'the stone 35.

What is claimedjs:

l. A honing tool, including, in combination, a tubular body'portion having the wall cut away to form a recessed portion communicating with the interior of the body portion, a rod rotatable within said body portion, a cam on said rod adjacent to said recessed portion, an abrasive stone supported in said-recessfor movement outwardly'and inwardly thereof by said cam, and-longitudinally movable means in the interiorof said body for rotating said rod.

2. A honing tool including, in combination, a tubular body portion having the wall cut away to form a flat portion on one side thereof communicating with the interior of the body portion, a rod rotatable within said body portion, a cam on said rod adjacent to'said flat portion and movable outwardly thereof, an abrasive stone supported in said flat portion for movement outwardly and inwardly thereof by said cam, and an axially movable element disposed within said body for rotating said rod.

3. In a honing tool, a body, a honing stone supported in said body, a rotatable cam within said body fixed against axial movement for adlusting the position of said stone, and an axially movable element Within the interior of said body fixed against rotation relative thereto for rotatin'gsaid cam.

4. In a' honing'tool, a body'having a recessed portion, a carrier encompassing saidbody and extendingwithin said. recessed portion, a stone on that portion of saidcarrier which extends within said: recessed portion, and means within the body for moving said stone outwardly of the body axis.

5. In a honing tool, a' body having a recessed portion, a spring carrier encompassing'said' body and extending Within said recessed portion, a stone supported by that portion of said carrier which extends within said recessed portion, and means within the body for moving said stone outwardly of the body axis, the tension in said carrier tending to move said stoneinwardly of the body.

6. In a honing tool, a body portion having the end provided with flat portions opposite sides thereof, a spring carrier disposed about said body portion extending over the flat portions thereof, a stone on that portion of said carrier which extends within one of said flat portions, and means for moving said stone outwardly of the body axis to engage. a cylinder wall which is'engaged by the carrier at points on opposite sideszof the flat portion opposite-to that containing saidlstone.

' 7. In a honing tool,.a hollow cylindrical body portion having. flat portions disposed on substantially opposite sides at one. end thereof with one portion extending through theinner wall of the body portion, a stone carrier sprung over the body portion across both of the flat portions thereof, a stone mounted on the portion of the on substantially carrier which is disposed in the flat portion extending through the inner wall of the body portion, a cam engageable with the carrier portion supporting the stone for moving the stone relative to the axis of the body portion to engage the Wall of a cylinder, the reaction to which is taken by points on the carrier on opposite sides of said other flat portion,

8. In a honing tool, a tubular body portion, a rotatable rod secured against longitudinal move-, ment within said body portion, a cam on said body portion projectable within a recess in the body portion, a tubular actuating element extending in the body portion, to which it is secured against relative rotation and which is provided with means for rotating the rod when moved am'ally, a carrier encompassing the body, and a stone mounted on the portion of the carrier opposite to said cam which moves the stone outwardly relative to the tool axis.

9. In a honing tool, a tubular body portion, a rotatable rod secured against longitudinal :movement within said body portion, a cam on said body portion projectable within a recess in the body portion, a tubular actuating element extending in the body portion to which it is secured against relative rotation and which is provided with means for rotating the rodwhen moved axially,

a carrier encompassing the body, and a stone mounted on the portion of the carrier opposite to said cam which moves the stone outwardly relative to the tool axis, said carrier being tensioned' to retain the stone-supporting portion of the carrier against the cam.

10. In a honing tool, a tubular body portion, a rotatable rod secured against longitudinal movement within said body portion, a cam on said body portion projectable within a recess in the body portion, a tubular actuating element extending in the body portion, to, which it is secured against relative rotation and which is provided with means for rotating the rod when moved axially, a carrier encompassing the body, a stone mounted on'the portion of the carrier opposite to saidcam which moves the stone outwardly relative to the tool axis, and a head on said tubular actuating element by which the element is secured to an adjusting portion of a machine.

11. In a honing tool, a tubular body portion, a rotatable rod secured against longitudinal movementwithin said body portion, a cam on said body portion projectable within a recess in the body portion, a tubular actuating element extending in the body portion, cured against relative rotation and which is provided with means for rotating the rod when moved axially,

a stone mounted on the portion of the carrier opto which it is sea carrier encompassing the body,

-the flat face portion,

posite to said cam which moves the stone outwardly relative to the tool axis, a head on said tubular actuating element by which the element is secured to an adjusting portion of a machine, and a flanged bushing on said cylindrical body portion by which the tool is supported in said machine. l 7

12. In a honing tool, a hollow cylindrical body, a tubular element within the body having helical slots, means for preventing relative rotation between the body and tubular element, a rotatable rod within the body portion, a pin extending through the helical body for permitting the rod to rotate while retaining it against axial movement, a cam on the rod, a stone carrier mounted on the cylindrical body portion, and a stone on said carrier movable outwardly of the body portion by said cam.

13. In a honing tool, a cylindrical body having a flat portion, a spring carrier encompassing and supporting itself on said body at the flat portion, means for moving said carrier outwardly of said flat portion, and a stone supported by the portion of said carrier extending in said flat portion of said body. g

14. A stone and carrier unit for a honing tool, including, in combination, an annular spring strip having an arcuate portion and a flat portion and a honing stone supported by said flat portion.

15. A stone and carrier unit for a honing tool including, in combination, an annular carrier substantially D-shaped in section, and a honing stone secured to the flat face of the section opposite to the curved portion thereof.

16. A stone and carrier unit for a honing tool including, in combination, an annular carrier made from a spring having a flat face and an arcuate portion forming a D shape in section, and a honing stone secured to the outer surface of the flat face portion thereof.

17. A stone and carrier unit for a honing tool including, in combination, an annular carrier made from a spring having a fiat face and an arcuate portion forming a D shape in section, and a honing stone secured to the outer surface of the one end of said stone extending beyond the arcuate portion of said carrier.

18. A honing tool including, in combination, an annular carrier approximating a'D-shape in section, an abrasive element mounted on the flat portion thereof, attacking means on said carrier by which it is driven in rotation, and means for flexing the carrier to move the abrasive element in a substantially radial direction with respect to the axis of said carrier.

JOHN E. KLINE.

slots into radial slots in the