US2116925A - Adjusting means for honing tools - Google Patents

Description

ay 9 K. w. CONNOR ET AL. 2,116,925

ADJUSTING MEANS FOR HbNING TOOLS Filed Oct. 7, 1935 3 Sheets-Sheet l INVENTOR6.

l lfzr/Pe 14660722102, E Eleasdale.

ATTOENEYS- May 10, 1938. K. w. CONNOR ET AL 2,116,925

ADJUSTING MEANS FOR HONING TOOLS Filed Oct. 7, 1935 3 Sheets-Sheet 2 May 10, 1938. K. w. CONNOR ET AL Q ,1

.ADJUSTING MEANS FOR HGNING TOOLS Filed Oct. 7,1935 3 Sheets-Sheet 5 INVENTORS.

- Kiri: 14460277102: fgglerf ,Bleasdale- ATTORNEYS? Patented May 10, 1938 UNITED STATES" PATENT OFFICE amass ADJUSTING mums won HONING TOOLS Application October 7, 1 935, Serial No. 43,932 9Claims. ((111-1843) The present invention relates to cylinder grinding or honing tools, and more particularly to the mechanism for controlling the expansion contraction of the abrading elements of such tools.

Principal objects of the present invention are to provide a honing tool having expansible and contractible abrading elements, and embodying improved means to control the expansion and contraction of the abrading elements; to provide a honing tool having a grinding head rotatable. and reciprocable with respect to a work piece throughout a working range and movable to a starting position outside of said range and embodying means to automatically move the grinding stones or abrasives into engagement with the work piece when the grinding head reaches a pre-- determined position within said working range: to provide a tool, as last stated. in which thecontrol means for the grinding stones or abra-- sives-is' responsive to the relative movement between the grinding head and the work piece;. to provide a tool, as last stated, in which the grinding stones or abrasives are retained in a retracted position during movement of the tool from the starting position to a predetermined point with respect to the working range; to provide a tool as last stated in which the abrasives are moved to work engaging position when the grinding head I reaches a point within the working range.

Further. objects of the present invention are to provide a honing tool embodying means for moving the tool grinding head from a starting position to a working position and for simulta-' neously rotating and reciprocating the grinding headwithin a working range, and embodying means responsive to the movement of the grinding head to the working position for moving the vgrinding stones or abrasives to work engaging position; to provide a honing tool as last stated embodying trip mechanism to control the movement of the grinding stones or abrasives to work engaging position when the grinding head reaches a predetermined point in a working range-and effective to thereafter retainCsaid-stones inthe work engaging position during movement of the grinding head throughout the entire working I range; to provide trip mechanism as last stated embodying a movable member effective atone limit of its movement to trip the grinding stones or abrasives into work engaging position and effective at the other limit'of its travel to release the stonesito provide trip mechanism as last stated, embodying a member which is carried 3 with the grinding head until it reaches one limit 01' its movementyat which time the stones or abrasives are tripped to work engaging position; and to provide trip mechanism, as last stated, embodying a-member resiliently supported upon and movable with respect to the supporting and. 5 guiding structure for the honing tool.

Further objects of the present invention are to provide a honing tool having a grinding head reciprocable with respect to awork piece throughout a predetermined working range, and embody- 0 ing trip mechanism effective to move the grinding stones or abrasives to work engaging position when the grinding head reaches an intermediate point in said working range; to retain said grinding stones in said work engaging position '15 throughout subsequent movement throughout said working range, and to thereafter release said stones to a retracted position when said grinding head is in an intermediate point in said range; to provide a honing tool as last stated, in which the trip mechanism is automatically controlled by counting mechanism and releases the stones to retracted position after a predetermined number oi reciprocatory movements between the grinding head and the workpiece; and to provide a honing tool in which the trip mechanism is responsive to the movement of and position of the grinding head with respect to the work piece.

With the above and other objects in view, which appear in the following description and in the accompanying claims, illustrative embodiments of the. present invention are shown in the accompanying drawings, throughout the several views of which corresponding reference characters are used to designate corresponding parts, and in which:

Figure 1 is a view in central vertical section of an illustrative embodiment of the present invention: Fig. 2 is a view in horizontal section, taken 40 along the line 2-2 of Fig. 1;

Fig. 3 is a view in central vertical section of a modified embodiment of the presentinvention. providing a unitary trip mechanism for a bank I or gang of honing tools; and 46 vFig. 4 is a view in elevation, partly in section, of an embodiment of the present invention in which both the tripping to abrading position and release to retracted position of the grln'dim i stones or abrasives occur while the grinding head 50 is within a working range.

-In its broader aspects, the present invention provides an improved honing tool, having a. grinding head reciprocable over a predetermined range with respect to a work piece and embodytively positioned within the working range.

ing means to trip the grinding stones or abrasives to a work engaging position when the grinding head reaches an intermediate point in the working range, and to thereafter retain the stones in such work engaging position during movement of the head throughout the entire working range. In a more restricted sense, the present invention is, directed principally to supplementary structure, which may be used with various existing types of honing tools, to control the'tripping and releasing of the grinding stones in the just stated manner. Several such conventional types of tools are illustrated in conjunction with the improved tripping mechanism of the present invention, and it will be understood that within the principles of the present invention various other types of honing tools may be used with the improved tripping mechanism, either in its illustrated or slightly modified form.

In one illustrated form, the improved tripping mechanism of the present invention is applied to a honing tool of the type described and claimed in the patent to F. J. Jeschke, No. 1,944,660, granted January 23, 1934, and assigned to the assignee of the present application. The patented structure comprises generally a grinding head and a driving head, which are universally interconnected. The grinding head carries a plurality of grinding stones or abrasives which may be moved automatically by tripping mechanism, from a retracted position to a work engaging position. The driving head is adapted for connection to a source of power, effective to simultaneously rotate the grinding head and reciprocate it with respect to the work piece throughout a predetermined range.

The tripping mechanism comprises generally tripping fingers extending radially from a portion of the tool for engagement by what may be called a tripping sleeve. When the grinding head and work piece reach a predetermined relative position, the tripping sleeve engages the tripping fingers and moves them radially of the tool to actuate the grinding stone to work engaging position, in which position the grinding stones are retained during the subsequent engagement of the grinding head and work piece with respect to each other. The actuation of the grinding stones to work engaging position occurs before the working range between the grinding head and the work piece is reached.

In accordance with the present invention, it is considered desirable to postpone the movement of the grinding stone to work engaging position until the grinding head and work piece are rela- Accordingly, the trip mechanism is so constructed that it .is eifective to trip the stones to work engaging position when the grinding head reaches an intermediate point in the working range with reference to the work piece, and to thereafter retain the grinding stones in the work engaging position during movement of the grinding head throughout the entire working range relative to the work piece.

In accomplishing this, the tripping sleeve is made movable with respect to the tool supporting structure, and at one limit of its movement is effective to trip the stone to work engaging position and at the other limit is efiective to release the stones. The sleeve is carried between these positions by the engagement between it and the previously mentioned tripping fingers, and, preferably, the sleeve is resiliently sup orted and thus urged to an intermediate position in its path of travel.

In a second illustrated form the present invention is applied to a honing tool of the type described and claimed in the patent to F. M. Kern, No. 1,944,662, granted January 23, 1934, and assigned to the assignee of the present application. Insofar as the present invention is concerned, the Kern structure distinguishes principally from the Jeschke structure in that the tripping mechanism comprises cam fingers carried by the tool and which, after having been tripped by a tripping cam stationarily supported, are retained in the tripping position by a pawl and ratchet construction. When the tool is withdrawn from the working range relative to the work piece, the tripping cam actuates the tripping fingers in an opposite direction, releasing the pawl and ratchet connection and permitting the stones to move to a retracted position.

In applying the principles of the present invention to a tool of this character, a tripping cam similar to that illustrated in the Kern patent may be used, and which is movable throughout a predetermined range by the movement of the honing tool. With this arrangement, during relative movement between the grinding head and the work piece to the working range, the tripping cam is carried with the tool until the grinding head reaches an intermediate point in the working range. At this point, the movement of the tripping cam is interrupted, thus rendering it efiective to trip the stones into work engaging position. This tripping action also releases the tripping cam from the honing tool, permitting it to resume its initial position under the influence of suitable spring mechanism, and thus rendering it ineffective to again trip the tripping fingers until the grinding head is removed from the working range.

The just described embodiment also shows the application of the present invention to multiple honing units embodying a tripping cam common to the several honing tools. In the form illustrated, a single tripping plate having cam surfaces individual to the respective honing tools with which it is associated is movably supported upon a stationary part of the system, and is biased to an initial position by suitable spring mechanism. Movement of any of the associated honing tools is eflective to carry the entire cam plate with it, the subsequent action of the cam plate being as described immediately above.

In accordance with a further feature of the present invention, the tripping mechanism is arranged to trip the stones to work engaging position when the grinding head reaches an intermediate point in the working range, retain theabrasive in such work engaging position throughout a predetermined working period, and then release the grinding stones to a retracted posi tion at an intermediate point in the working range. With this arrangement, both the movement of the stones to work position and the retraction thereof from the work engaging posi-- tion, occurs within the working range. In the form illustrated, a tool of the type described in the'above identified Kern patent is utilized, and a tripping cam is provided for movement by the honing tool to tripping position, at which .it is stopped, and in which position it is effective to trip the stones to work engaging position. This tripping action, as in the previously described embodiment, occurs when the grinding head is in a working range with reference to the work piece.

' warclly through its supporting frame members I aiiaeac Mechanism is also provided responsive to the subsequent reclprocatory grinding movement between the grinding head and the work piece, ancl which may be called a counting device. This counting device, alter a predetermined number of reciprccations between the grinding head and the work piece, is efilectlve to move the trippingcam to a position in which it is effective to trip the stones to the retracted position upon the arrival of the grinding head at an intermediate point in the working range with reference to the work piece. l

Gonsldering the alcove embodiments in more detail and referring first to Figs. 1 and 2, a multiple assembly is illustrated. as comprising a p1urality of similar grinding tools designated generally as it and assoclatwl with illustrative work pieces it. Each of the honing tools ill may be, and preferably is, constructed in accordance with the previously mentioned Jeschlre Patent No. 1,944,660 and is provided with a connector ill through which it may be connected to a suit able external source oi power effective to simultaneously rotate and reciprocate the tool. The illustrated tools it are auaptecl for internal erinding aiicl are each provided with grinding heads it which carry a plurality of expanslble. and con tractible abrasives or grinding stones it. As described in more detail in the above identified J'eschlre patent, the expansion and contraction of the stones it are controlled by a plurality of tripping fingers to, disposed racially of the tool shank. Movement of the tripping fingers it to the positions illustrated in Fig. 1 loads suitable spring mechanism disposed within the tool body. which biases the stones outwardly into engagement with the surfaces of the associated work. piece. Release of the tripping fingers it, permitting the upper ends thereof to move outwardly of the tool hooly, permits the stones to be retracted within the head, out of engagement with the associated work piece.

The tripping fingers ill of each tool are moved inwardly and. outwardly under the control of a tripping sleeve to. individual to the associated tool and which is guided within an outer sleeve 22, which may also be individual to the associated tool. A lower limit of travel for each sleeve till is provided by the engagement of the base thereof with an inwardly extending shoulder it formed near the base of the outer sleeve 22. A corresponding limit to the upward movement of each of the sleeves to is provided by a stop it, threaded into the upper end of outer sleeve 22 and disposed in the path of the upper end of the associated sleeve to. A compression spring 28, caged between a shoulder fill formed in each outer sleeve 22 and an outwardly extending shoulder ill formed at the upper end of each sleeve it, biases the associated sleeve to its uppermost position.

The inner surface of each sleeve to is divided into an upper section M of enlarged diameter and a lower section tit of reduced diameter, both sections being joined by a chamferedl surface 33.

- The diameter of the enlarged portion to is large enough to receive the tripping fingers it in their outward or stone retracting positions. The diam eter of the reduced portion SS is such that the movement of the tool thereinto moves the trip-- ping fingers l8 inwardly of the tool and effects the previously mentioned expanding action of the grinding stones or abrasives.

When, in operation, a tool it is moved clownthe outwardly extending tripping fingers l8 therewith the tool ill, the opposition of the supporting springs 2% associated with the sleeves 2% being overcome by the resistance to inward motion of the fingers ill.

When the tool Ill reaches the position corresponding to the position which the left-hand tool of Fig. 1 is illustrated as occupying, and which corresponds to an intermediate point in the worlr-' ing range thereof with respect to the work niece H, the lower end of the tripping sleeve it ongages the shoulder 2C4 in the outer sleeve 22, interrupting further downward movement of sleeve as. Continued movement of tool ill, accordingly, causes the fingers it to be crammed inwardly by the surface Slit, thus actuating the grinding stones it into engagement with the surface of the wort: piece ll.

In general operation, it may he expected that after such tripping action, the tool ill will contlnue downwardly until the lower limit of its stroke is reached, and it occupies the position in which the middle tool of Fig. l is illustrated. During such continued downward movement of the tool the tripping lingers it slide along the surfacetlh of the tripping sleeve 26. If, on the other hand, the movement of the tool is reversed immediately after the tripping action occurs, the upward movement of the tool will be accompanied hy a corresponding upward movement of the sleeve til, under the influence of the supporting springs 28 so that the fingers lit will be retained within the reduced portion till oi the sleeve and the grinding stones it will retained '1 en gagement with the wort;

If a tool ll] is withdrawn from its worlr piece it, past the upper limits of its washing strolte (right hand tool Fig. 1) such pull-out movement brings the upper end of the tripping sleeve 2U into engagement with the associated stop 2%, interrupting further upward movement oi the sleeve it. Continued pull-out movement of the tool ill thus slides the tripping fingers out of the sleeve 2% into the enlarged portion t t thereof in which they are free to swing outwardly of the tool it and release the stones to a retracted position.

As best illustrated by the middle tool of Fig. l the length of each sleeve flu is such that with the tool at its lowermost position and the assoelated sleeve at its uppermost position, the fingels to are still retained within the sleeve.

Throughout the operation of each of the tools It within the working range thereof accordingly, the tripping fingers It occupy positions along the surfaces 36 of reclucecl diameter within the associated sleeve 26 and the stones are thus held in work engaging position during the movement of the tool within the working range. The release of the stones from the work engaging position occurs automatically as stated above when a tool it! is withdrawn to a point beyond its working range, bringing the assoclated sleeve til into engagement with its upper limit of travel, and thus releasing the fingers l8 therefrom.

It will be noted that in the just described em.-

til)

bodlrnent, the tripping sleeves are individual-to utilizing tools which may be, and preferably are,

of the type described and claimed in the above 'and are provided with grinding heads designated generally as 56. As will be understood, the upper ends of the respective tools 50 are constructed to cooperate with a suitable external source of power to effect a simultaneous rotation of the grinding heads 56 within the associated cylinders or other objects 58, and to simultaneously effect a reciprocation thereof within such cylinders. In Fig. 3, for convenience, the left-hand tool is illustrated as occupying an intermediate or tripping position within the associated cylinder 58; the tool next to the left is illustrated as at the lower limit of its working range; the tool next to the rightis illustrated as at the upper limits of its working range; and the tool on the extreme right is illustrated as occupying a withdrawn or pull-out position, in which it may be disposed during adjustment of the tool or during a replacement of the associated work piece 58', as will be understood. As described in more detail in the above identified Kern patent, each of the tools 50 may be provided with tripping fingers 60 disposed in the path of and for actuation by tripping cams 62. In the illustrated embodiment, all of the tripping cams 62 for the several tools form part of a common plate and are secured upon bosses 64 by studs 63. Bosses 64, in turn, are slidably supported upon standards 66 which may form part of or be secured to the machine frame 54. Compression springs 68, the opposite ends of which are seated between the upper surface of the frame 54 and the under surface of the bosses 64, surround standards 66, and bias bosses 64 to the illustrated positions. With this arrangement, the tripping cams 62 are thus movable from the illustrated full line position to the illustrated dotted line position, in which they are stopped by the engagement of a collar 12 on. each boss with a collar 10 extending upwardly from the frame.

Engagement of any of the 'cams 62 by the associated fingers 60 during downward movement of the fingers 60 with respect to the cams, swings,

the fingers 60 to the positions illustrated in Fig. 3. In this position the grinding stones or abrasives associated with the particular tool are biased to a work engaging position. The arrangement is such that after such tripping movement of each finger 60, it is retained in the tripped and work engaging position of the stones, even though the tripping cam 62 thereafter be removed from the region of the finger 60. Engagement of any finger 60 by the associated tripping cam 62 during upward movement of the finger with-respect to the cam rotates the finger in' a clockwise direction as viewed in Fig. 3, releasing the stones to a retracted position in which they are out of engagement with the associated work piece.

With the arrangement of Fig. 3, the parts are so positioned that downward movement of any tool 50 from the loading position brings the finger 60 associated therewith into engagement with the associated cams S2 somewhat before the upper limit of the working range of the tool is reached. The engagement between the finger 6U and cams 62 causes the cams B2 to move downtime the tool 50 reaches an intermediate point in its working range, as illustrated for the left-hand tool of Fig. 3, the-tripping cams 62 reach their lower limit of travel. Continued downward move- 'ment of the tool 50 thus trips finger 60 to a work engaging position of the associated, grinding stones or abrasives. The tripping action between the cams 62 and the finger 60 also releases the cams 62, allowing them to rise to the normal and illustrated position under the influence of the springs 68, in which position they are out of range of the associated finger 60 as long as the toolll is retained within the working range thereof. Accordingly, as long as the movements of the tools 50 are confined to the working. range, as shown for the left hand tool of Fig. 3, and the next two tools immediately adjacent thereto, the grinding stones or abrasives are retained in the work engaging position and the grinding action may continue. If, however, a tool 50 is withdrawn from the work to the'starting position shown for the right-hand tool of Fig 3, such withdrawing movement brings the associated tripping finger 60 into engagement with'the associated tripping cams 62, rotating the tripping finger in a clockwise direction as viewed in Figure 3, and releasing the stones to a retracted position, out of engagement with the associated work piece.

Accordingly. it will be seen that in operating any of the tools of Figure 3 individually, or operating all of them as a unit, the downward movement thereof to a point within the working range automatically moves the stonesto work engaging position in which they are retained throughout the movement of the tool within such working range. Withdrawal of the tool on the other hand, or tools, to a starting position retracts the stones out of engagement with the work.

The embodiment of the present invention shown in Figure 4 distinguishes principally in function from the above described embodiments in that the retraction of the grinding stones from grinding position, as well as the movement thereof to grinding position, is efi'ected while the grinding head is within its working range with respect to the as ociated work piece. Referring particularly to gure 4, a honing tool 50, which may and preferably does correspond in all respects to the tools 50. shown in Figure 3, is

guided in a sleeve 52, forming part of or suitably cured as by' studs 63 to bosses 64, which correspond to those described in connection with Figure 3, and one of which is illustrated in Figure 4. Each of the bosses 64 is slidably secured upon a standard 66, which may form a portion of the supporting frame 54, and is normally biased to the illustrated position by the compression spring 68. A lower limit of travel for each of the bosses S4 and for the tripping earns 62 is provided by the engagement between the collar 12 of each boss with acollar 10 extending upwardly from the base 54.

Each standard 66 also slidably carries a second collar 80, and retained thereon by a cap nut 82.

2. In honing mechanism, comprising a tool having an abrading element movable between abrad-' ing and retracted positions to operate upon the surface of an object and adapted to be rotated and axially reciprocated relative to said object, the combination of a first adjusting means carried by said tool for effecting movement of said abrading element between said abrading and retracted positions; a second adjusting means for cooperation with said first adjusting means; means movably mounting said second adjusting means adjacent the path of reciprocation of said tool for engagement and movement by said first adjusting means; means limiting the movement of said second adjusting means, said first and second adjusting means cooperating at said limit to actuate said abrading element to abrading position; and additional means operable at the conclusion of a honing operation for moving said second adjusting means to cause said first and second adjusting means to cooperate to cause movement of said abrading element to retracted position.

3. In a honing machine,.the combination with a plurality of honing tools, means whereby said honing tools may .berotated and reciprocated, a movable member cooperating with all of said tools for controlling the expansion and contraction of the abrading elements thereof, and means said tools, means on said tools for effecting the expansion and contraction of the abrading elements thereof, and means cooperating-between said member and tool expanding means for controlling the position of said abrading elements of all of said tools when said member is actuated. and means for actuating said member.

5. In a honing device, the combination with a plurality oi honing tools, means whereby said honing tools may be rotated and reciprocated, a cross member cooperating with said tools and movable independently thereof, means for supporting said member in a direction of the axes of said tools, means on said tools for efl'ecting the expansion and contraction of the abrading elements thereof, means cooperating between said member and tool expanding means for controlling the position of said abrading elements of all of said tools when said member is actuated, and a fluid operated devicefor actuating said member.

6. In a honing device, the combination with a plurality of honing tools, means whereby said honing tools may be rotated and reciprocated, a I

elements thereof, means cooperating between said member and tool expanding means for controlling ering said member on said slides, and means co operating between said member and tools for controlling the expansion and contraction oi the abrading elements of said tool.

8. Honing mechanism comprising, in combination, a honing tool having an abrading element movable between an abrading and a retracted position, said tool being disposed to be reciprocated from a starting position to a working range at the beginning of a honing operation and thereafter during said honing operation to be reciprocated throughout said working range; a tripping element carried by said tool'and actuable to move said abrading element between said abrading .and retracted positions; a tripping member mounted for movement relative to said tool between a tripping position in which it is efiective to cooperate with said tripping-element and avretracted position; means for normally retaining said tripping member in said retracted position; means for causing said tripping member to move to said tripping position as said tool is advanced from said starting position to said working range so as to actuate said abrading element to abrading position; and additional means for moving said tripping member to tripping position so as to cause said abrading element to move to retracted position.

9. Honing mechanism comprising, in combination, a honing tool having an abrading element movable between an abrading and a retracted poirom a starting position to a working range at the beginning of a honing operation and there after during said honing operation to be reciprocated throughout said working range a tripping member adapted to co-act with said abrading element to effect movement thereof between said abrading and retracted position; means for normally retaining said tripping member in a retracted position; means mounting said tripping member so that movement of said tool from said starting position to a point within said working range iseifective to carry said tripping member along therewith from said retracted position to a tripping position; means comprising a stop for said tripping member to interrupt said movement thereof and cause said tripping member to actuate said abrading element to abrading position when said tool reaches an intermediate point in said working range; and additional means coacting with said tripping member to cause movement thereof from said retracted position into position to co-act with said abrading. element to cause said abrading element to move to retracted position.

KIRKE W. CONNOR. ALBERT BLEASDALE.

sition, said tool being disposed to be reciprocated CERTIFICATE OF CORRECTION. Patent No 2,116,925. I May 10, 19

KIRK'E w. CONNOR, ET AL. It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 6, first column, lines 59, 5.2.and. 65, claims 1 5 and 6 respe otively, after "member" insert the words for movement; and that the said Letters Patent shouldbe read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 5th day of July, A D. 1958.

v Henry Van Ars ciale, (S l) Acting Commissioner of Patents.

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