CA1200980A - Fixed diameter single pass abrasive tool with multi- layer grit inserts - Google Patents
Fixed diameter single pass abrasive tool with multi- layer grit insertsInfo
- Publication number
- CA1200980A CA1200980A CA000411001A CA411001A CA1200980A CA 1200980 A CA1200980 A CA 1200980A CA 000411001 A CA000411001 A CA 000411001A CA 411001 A CA411001 A CA 411001A CA 1200980 A CA1200980 A CA 1200980A
- Authority
- CA
- Canada
- Prior art keywords
- tool
- arbor
- single pass
- diameter
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 69
- 239000004575 stone Substances 0.000 claims abstract description 53
- 239000002245 particle Substances 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 5
- 239000003082 abrasive agent Substances 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000002421 finishing Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
- B24B33/087—Honing tools provided with measuring equipment
Abstract
FIXED DIAMETER SINGLE PASS
ABRASIVE TOOL WITH MULTI-LAYER GRIT INSERTS
ABSTRACT OF THE DISCLOSURE
A single pass cutting tool of the disclosure includes a body having a plurality of guide surfaces defining stone recesses and means for guiding abrasive stones into adjustable fixed diameter cutting positions.
A tapered arbor engages inboard surfaces of the abrasive stones to establish the size of the cutting section and adjustable means are provided to translate relatively the arbor and inboard surfaces to adjust the diameter size of the cutting section and to lock it in its sized position. The expandable tool construction is particu-larly adaptable for abrasion tools and is disclosed with abrasive particles secured to the cutting section.
ABRASIVE TOOL WITH MULTI-LAYER GRIT INSERTS
ABSTRACT OF THE DISCLOSURE
A single pass cutting tool of the disclosure includes a body having a plurality of guide surfaces defining stone recesses and means for guiding abrasive stones into adjustable fixed diameter cutting positions.
A tapered arbor engages inboard surfaces of the abrasive stones to establish the size of the cutting section and adjustable means are provided to translate relatively the arbor and inboard surfaces to adjust the diameter size of the cutting section and to lock it in its sized position. The expandable tool construction is particu-larly adaptable for abrasion tools and is disclosed with abrasive particles secured to the cutting section.
Description
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FIXED DIAMETER SINGLE
TECHNICAL FIELD
This invention relates to an adjustable single pass tool including a multi-layer abrasive cutting section and a translatable arbor to adjust and fix the size of the cutting section.
BAC~GRO~ND ART
Prior art patents disclose expandable cutting tools having a cutting section that adjusts as it is rotated and axially inserted within a bore to be : machined. For example, the U.S. Patent of Emerson 1~791~491 discloses a honing tool having a spring biased arbor that provides tool alignment as the tool I is rotated and moved axially in a bore through several : 15 passes to progressively enlarge the hole on each pass.
: Likewise, the U.S. Patent of 81aylock 4r075~794 discloses a multi-pass honing tool with a tapered arbor that aligns the tool as it is rotated and moved axially within a bore to be machined and which includes an axially posi~ioned spring to bias the stones outwardly of a body~
DISCLOSURE OF THE INVENTION
An object of ~he present invention is to pro-vide an improved single pass cutting tool for machining a bore upon tool rotation and single pass axial movement through the bore to remove a predetermined amount of stock after which the workpiece is moved to another work station for fur-ther stock removal by a like tool if desired and wherein the tool includes a cut-ting section and an adjustable arbor that will adjust and fix the diameter size of the cutting section to machine the bore to the required single pass size and provide tool alignment during the machining.
According to the present invention there is provlded a single pass abrasive tool which includes a tool body with cutting section means fixedly connectable to the body to maintain a single pass cutting diameter for removing a predetermined amount of stock from a workpiece bore during a single pass axial and rotary movement of the tool through the bore, the tool cutting section means including a plurality of abrasive stones each having an arcuate cutting face and each having suxfaces thereon guidingly supported both axially and circumferentially by said body to counteract torque and thrust loading during removal of stock from the workpiece, each stone further including an axially inclined positioning surface, arbor means located within said body having a large diameter end extending from the body and including a tapered surface thereon engageable with each of the inclined positioning surfaces and relatively axially translatable with respect to the positioning surfaces to adjust the diameter of the cutting section means. Adjustment means is provided to secure the cutting section means at an adjusted diameter whereby the cutting section means is presettable to an initial single pass cutting diameter and resettable to the single pass cutting diameter to compensate for wear.
In an illustrated embodiment of the invention, the cutting tool inlcudes a single cone shaped arbor axially positioned with respect to a tool body by a threaded
--1~
FIXED DIAMETER SINGLE
TECHNICAL FIELD
This invention relates to an adjustable single pass tool including a multi-layer abrasive cutting section and a translatable arbor to adjust and fix the size of the cutting section.
BAC~GRO~ND ART
Prior art patents disclose expandable cutting tools having a cutting section that adjusts as it is rotated and axially inserted within a bore to be : machined. For example, the U.S. Patent of Emerson 1~791~491 discloses a honing tool having a spring biased arbor that provides tool alignment as the tool I is rotated and moved axially in a bore through several : 15 passes to progressively enlarge the hole on each pass.
: Likewise, the U.S. Patent of 81aylock 4r075~794 discloses a multi-pass honing tool with a tapered arbor that aligns the tool as it is rotated and moved axially within a bore to be machined and which includes an axially posi~ioned spring to bias the stones outwardly of a body~
DISCLOSURE OF THE INVENTION
An object of ~he present invention is to pro-vide an improved single pass cutting tool for machining a bore upon tool rotation and single pass axial movement through the bore to remove a predetermined amount of stock after which the workpiece is moved to another work station for fur-ther stock removal by a like tool if desired and wherein the tool includes a cut-ting section and an adjustable arbor that will adjust and fix the diameter size of the cutting section to machine the bore to the required single pass size and provide tool alignment during the machining.
According to the present invention there is provlded a single pass abrasive tool which includes a tool body with cutting section means fixedly connectable to the body to maintain a single pass cutting diameter for removing a predetermined amount of stock from a workpiece bore during a single pass axial and rotary movement of the tool through the bore, the tool cutting section means including a plurality of abrasive stones each having an arcuate cutting face and each having suxfaces thereon guidingly supported both axially and circumferentially by said body to counteract torque and thrust loading during removal of stock from the workpiece, each stone further including an axially inclined positioning surface, arbor means located within said body having a large diameter end extending from the body and including a tapered surface thereon engageable with each of the inclined positioning surfaces and relatively axially translatable with respect to the positioning surfaces to adjust the diameter of the cutting section means. Adjustment means is provided to secure the cutting section means at an adjusted diameter whereby the cutting section means is presettable to an initial single pass cutting diameter and resettable to the single pass cutting diameter to compensate for wear.
In an illustrated embodiment of the invention, the cutting tool inlcudes a single cone shaped arbor axially positioned with respect to a tool body by a threaded
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stud connected to the arbor and threaded through a nut fixed to the body. A tapered surface of the cone engages an inclined surface on each of the abrasi~e stones to locate them to define a single pass cutting 5 diameter~ Circular springs seated in annular body grooves and stone grooves hold the stones inwardly of the body during single pass tool rotation and movement through the bore. Wear compensation is produced by adjusting the position of the arbor by cranslating it with respect to the cutting section so as to locate it at a desired preset cuttlng diameter for single pass stock removal from the bore~
The too] construction disclosed is particularly adaptable for use with abrasion cutting although other uses are possible. In a specific e~odiment, a unitary tool body has plural recesses to guide the stones bo~h radially and axially thereby to define a cutting section of fixed form. An inner tapered surface on each of the stones provides for moun~ing of the stones on a tapered arbor. Relative axial transla-tional movement between the arbor and stones establishes the size of the toolO Initial sizing of the tool for use is thus facilitated and any wear of the abrasive particles can be compensated for by arbor movement wi~h respect to the stones to maintain the tool 5 i~e for desired single pass stoc.~ removal.
The objects, fea~ures, and advantages of the present invention are readily apparent from the follow-ing description of the best mode for carrying out the invention taken in connection with the accompanying drawings~
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BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a longitudinal sectional view of a cutting tool constructed according to the present invention and shown mounted on a rotatable and axially movable tool chuck;
Figure 2 is a cross-sectional view of the tool taken along line 2-2 of Figure 1 looking in the direction of the arrows;
Figure 3 is a cross-sectional view taken along the line 3-3 o~ Figure 1 looking in the direction of the arrows, Figure 4 is a side elevational view of another embodiment of the present invention;
Figure 5 is an end elevational view of the embodiment of the invention in Figure 4;
Figure 6 is a fragmentary, enlarged elevational view of a cutting tool holder in the embodiment of Figure 4;
Figure 7 is a fragmentar~l, enlarged cross-sectional view taken along the line 7-7 of Figure 5 looking in the direction oE the arrows;
Figure 8 is a side elevational view of a diamond abrasion tool used in the emboaiment of Figure ~;
Figure 9 is an end elevational view of the tool shown in Figure 8,and Figure 10 is a perspective view of the tool of Figure 1.
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BEST MODE ~OR C~RRYING OUT THE lN~ ON
A single pass cutting tool 10 constructed accord-ing to the present invention is shown in Figures 1-3 of the drawings~ The tool 10 is rnounted on a spindle chuck 12 for rotation about an axis to provide single pass machining of a bore upon axial tool movement through the bore. Cutting tool 10 includes a plurality of adjustable cutting sections 14, an adjustable arbor 16 and a threaded adjusting stud 18 at the trailing end of the tool.
As seen best in Figure 2, the cutting tool 10 includes a unitary tool body 20 that is made from a suitable metal such as steel. The tool body 20 has a plurality of abrasive stones ~2 with an arcuate cutting surface 24 of abrasive particles such as diamond or cubic boron nitride secured thereto in a suitable manner to define a multi-layer abrasive stone which increases useable abrasive volume in the finishing process O
The tool 10 is used in a single pass operation wherein it is fed through a workpiece bore in a single pass for removal of stock and then it is withdrawn from the bore during a retract cycle. Such one-pass finish-ing operations will size the bore to close size,roundness and straightness tolerances. The tool 10, as will be discussed, is preset to a fixed diameter to prevent manufacture of oversi2ed bores. ~s the tool 10 is fed through the workpiece bore, it is rotated to generate the preset tool diameter through the bore.
~ sually, stock removal during each single pass is comparatively small and limited to a maximum of a few thousandths o~ an inch. When stock removal requirements ...... ... . . . . . . .
-.
exceed that obtained by single tool pass stock removal, additional tools are arranged in-line with each single pass station having a tool of progressively greater diameter to produce a desired final workpiece bore diameter without exceeding the tools capacity for single pass stock removal. Each of the machines single pass stations can be e~uipped with an in process gage system of the type set-forth in United States Patent Application Serial No. 126,922, filed March 3, l9aO
by Paul Fitzpatrick et al.
Single pass stock removal and repeatability of the removal for a number of workpieces is in part due to the con~iguration and fit of each of the abras-ive stones 22.
More particularly, the tool body 20 has three,circumferentially spaced recesses 26 formed therein.
Each recess 26 receives a stone 22. Spaced, parallel, side-walls 28,30 of each recess 26 engage and slidably guide the side surfaces 32,34 of each stone 22. The surfaces 32,34 firmly secure the stones 22 against machine torque when the tool is preset to its desired stock removal diameter. Likewise, each recess has opposite end surfaces 36,38 which support the ends 40,42 of each stone 22 to prevent axial shift of the stones during feed and retract of the tool 10.
Further, each stone 22 has an inboard surface 46 which is inclined with respect to a cuttin~ section 48 which is bounded at its outboard end by the arcuate cutting surface 24.
stud connected to the arbor and threaded through a nut fixed to the body. A tapered surface of the cone engages an inclined surface on each of the abrasi~e stones to locate them to define a single pass cutting 5 diameter~ Circular springs seated in annular body grooves and stone grooves hold the stones inwardly of the body during single pass tool rotation and movement through the bore. Wear compensation is produced by adjusting the position of the arbor by cranslating it with respect to the cutting section so as to locate it at a desired preset cuttlng diameter for single pass stock removal from the bore~
The too] construction disclosed is particularly adaptable for use with abrasion cutting although other uses are possible. In a specific e~odiment, a unitary tool body has plural recesses to guide the stones bo~h radially and axially thereby to define a cutting section of fixed form. An inner tapered surface on each of the stones provides for moun~ing of the stones on a tapered arbor. Relative axial transla-tional movement between the arbor and stones establishes the size of the toolO Initial sizing of the tool for use is thus facilitated and any wear of the abrasive particles can be compensated for by arbor movement wi~h respect to the stones to maintain the tool 5 i~e for desired single pass stoc.~ removal.
The objects, fea~ures, and advantages of the present invention are readily apparent from the follow-ing description of the best mode for carrying out the invention taken in connection with the accompanying drawings~
~. .
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a longitudinal sectional view of a cutting tool constructed according to the present invention and shown mounted on a rotatable and axially movable tool chuck;
Figure 2 is a cross-sectional view of the tool taken along line 2-2 of Figure 1 looking in the direction of the arrows;
Figure 3 is a cross-sectional view taken along the line 3-3 o~ Figure 1 looking in the direction of the arrows, Figure 4 is a side elevational view of another embodiment of the present invention;
Figure 5 is an end elevational view of the embodiment of the invention in Figure 4;
Figure 6 is a fragmentary, enlarged elevational view of a cutting tool holder in the embodiment of Figure 4;
Figure 7 is a fragmentar~l, enlarged cross-sectional view taken along the line 7-7 of Figure 5 looking in the direction oE the arrows;
Figure 8 is a side elevational view of a diamond abrasion tool used in the emboaiment of Figure ~;
Figure 9 is an end elevational view of the tool shown in Figure 8,and Figure 10 is a perspective view of the tool of Figure 1.
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BEST MODE ~OR C~RRYING OUT THE lN~ ON
A single pass cutting tool 10 constructed accord-ing to the present invention is shown in Figures 1-3 of the drawings~ The tool 10 is rnounted on a spindle chuck 12 for rotation about an axis to provide single pass machining of a bore upon axial tool movement through the bore. Cutting tool 10 includes a plurality of adjustable cutting sections 14, an adjustable arbor 16 and a threaded adjusting stud 18 at the trailing end of the tool.
As seen best in Figure 2, the cutting tool 10 includes a unitary tool body 20 that is made from a suitable metal such as steel. The tool body 20 has a plurality of abrasive stones ~2 with an arcuate cutting surface 24 of abrasive particles such as diamond or cubic boron nitride secured thereto in a suitable manner to define a multi-layer abrasive stone which increases useable abrasive volume in the finishing process O
The tool 10 is used in a single pass operation wherein it is fed through a workpiece bore in a single pass for removal of stock and then it is withdrawn from the bore during a retract cycle. Such one-pass finish-ing operations will size the bore to close size,roundness and straightness tolerances. The tool 10, as will be discussed, is preset to a fixed diameter to prevent manufacture of oversi2ed bores. ~s the tool 10 is fed through the workpiece bore, it is rotated to generate the preset tool diameter through the bore.
~ sually, stock removal during each single pass is comparatively small and limited to a maximum of a few thousandths o~ an inch. When stock removal requirements ...... ... . . . . . . .
-.
exceed that obtained by single tool pass stock removal, additional tools are arranged in-line with each single pass station having a tool of progressively greater diameter to produce a desired final workpiece bore diameter without exceeding the tools capacity for single pass stock removal. Each of the machines single pass stations can be e~uipped with an in process gage system of the type set-forth in United States Patent Application Serial No. 126,922, filed March 3, l9aO
by Paul Fitzpatrick et al.
Single pass stock removal and repeatability of the removal for a number of workpieces is in part due to the con~iguration and fit of each of the abras-ive stones 22.
More particularly, the tool body 20 has three,circumferentially spaced recesses 26 formed therein.
Each recess 26 receives a stone 22. Spaced, parallel, side-walls 28,30 of each recess 26 engage and slidably guide the side surfaces 32,34 of each stone 22. The surfaces 32,34 firmly secure the stones 22 against machine torque when the tool is preset to its desired stock removal diameter. Likewise, each recess has opposite end surfaces 36,38 which support the ends 40,42 of each stone 22 to prevent axial shift of the stones during feed and retract of the tool 10.
Further, each stone 22 has an inboard surface 46 which is inclined with respect to a cuttin~ section 48 which is bounded at its outboard end by the arcuate cutting surface 24.
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The surfaces 46 engage the tapered outer surace 50 of the arbor 16 to adjustably position the surfaces 24 at a pre-set cutting section diameter.
Adjustment of the arbor 16 is accomplished by a threaded stud 52 secured to the small diameter end 54 of arbor 16 by a jam nu~ 56. The stud 52 is threadably received by a nut sa. Nut 58 is seated in a counterbore 60 of body 20. Three equidistantly, circumf~rentially spaced, set screws 62 in body 20 engage grooves 64 in the nut 58 to secure it against rotation relative to body 20. Consequently, rotation of the arbor 16 will cause it to be translated relative to surfaces 46 to adjust the abrasive stones to a desired preset diameter for single pass removal of stock.
The outside diameter of the large diameter end of arbor 16 has serrations 66 formed therein at a desired precalibrated circumferential spacing to reflect a predetermined amount of tool cutting section diameter change for each increment of rotation of arbor 16. A spring plunger 68 seated in an end bore 69 of body 20 to ride into and out of the serrations 66. This produces an audible indication and retention of the adjusted position of arbor 16 and allows calibration of diameter change to compensa~e for wear of stones 22.
Each of the abrasive stones 22 is hçld inboard of the recess side walls 28,30 and end surfaces 36,38 by a pair of circular springs 70,72 that are seated in arcuate grooves 74,76 formed at axially spaced points in the body 20. Each of the abrasive stones also i.ncludes spaced spring grooves 78,80 aligned with body grooves 74,76 to seat the springs 70,72 substantially inboard of the cutting surfaces 24 thereby to assure that the tool 10 can be adjusted for wear without exposing the springs to the cutting process.
~8~
Further, the tool body 20 includes an extension 80 with a small diameter end 82 that is received by a chuck and an intermediate diameter 84 which slidably supports a gage plug of the type set forth in abo~e-identified United States Serial No. 126,922.
In operation, the arbor 16 is rotated to cause nut 56 and stud 52 to translate the arbor 16 axially into or out of body 20. Movement of the arbor 16 into the body 20 will increase the single pass stoc~ removal diameter of the cutting sections 14. Movement of the arbor 16 outwardly of the body 20 will reduce the diameter of the cutting sections 14. This adjustment feature is readily adaptable to automatic tool adjustment systems wherein arbor rotation and consequent translation is produced by directing a rotatable cornpensation shaft 86 through a bore 88 in the extension 80.
Another embodiment of the present invention is set forth in Figures 4-9. A presettable, fixed diameter, single pass tool 90 is shown. It includes a unitary body 92 having a plurality of tool recesses 94 located at circumferentially spaced locations. Each recess has spaced side walls 96,98 which support a pair of!inserts 100. More particularly, a side 102 of an abrasive insert 100 is supported by wall 96. An opposite side 104 of another insert 100 is supported by wall 98. Opposite sides 102,104 of the pair of inserts 1 no engages the sides 106,108 of an insert clamp ll0 Each insert clamp 110 is wedge shaped as shown in ~igures 5 and is held in place by a pair of screws 112,114 to positively secure the abrasive inserts 100 in place on the body 92 to establish a cutting section of fixed diameter as defined by cutting surfaces 116 on the inserts lOOo .. . .
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_9_ Adjustment of the fixed diameter is accomplished by relative translational movement between an inclined sur~ace 118 at the bottom of each recess 94 and an inclined ramp 120 on the base of each insert 100. To increase tool diameter, each clamp 110 is released by backing screws 112,114 from a shoulder 122 inboard of each clamp 110. The inserts 100 are released and are free to be translated axially to the right as viewed in Figure 5. Such movement will cause the inserts 100 to shift outwardly of the recesses 94.
Increase in tool diameter is produced by reverse movement of the inserts 100. Following adjustment the insert clamps 110 are wedged against the inserts to fix the desired diameter once the screws 112,114 are threaded into the body sufficiently to tightly engage shoulder 122.
The aforedescribed embodiments of Figures 1-3 and Figures 4-9 disclose fixed diameter cutting tools especially configured to produce single pass finishing operations for improved hole size, roundness and straightness.
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The surfaces 46 engage the tapered outer surace 50 of the arbor 16 to adjustably position the surfaces 24 at a pre-set cutting section diameter.
Adjustment of the arbor 16 is accomplished by a threaded stud 52 secured to the small diameter end 54 of arbor 16 by a jam nu~ 56. The stud 52 is threadably received by a nut sa. Nut 58 is seated in a counterbore 60 of body 20. Three equidistantly, circumf~rentially spaced, set screws 62 in body 20 engage grooves 64 in the nut 58 to secure it against rotation relative to body 20. Consequently, rotation of the arbor 16 will cause it to be translated relative to surfaces 46 to adjust the abrasive stones to a desired preset diameter for single pass removal of stock.
The outside diameter of the large diameter end of arbor 16 has serrations 66 formed therein at a desired precalibrated circumferential spacing to reflect a predetermined amount of tool cutting section diameter change for each increment of rotation of arbor 16. A spring plunger 68 seated in an end bore 69 of body 20 to ride into and out of the serrations 66. This produces an audible indication and retention of the adjusted position of arbor 16 and allows calibration of diameter change to compensa~e for wear of stones 22.
Each of the abrasive stones 22 is hçld inboard of the recess side walls 28,30 and end surfaces 36,38 by a pair of circular springs 70,72 that are seated in arcuate grooves 74,76 formed at axially spaced points in the body 20. Each of the abrasive stones also i.ncludes spaced spring grooves 78,80 aligned with body grooves 74,76 to seat the springs 70,72 substantially inboard of the cutting surfaces 24 thereby to assure that the tool 10 can be adjusted for wear without exposing the springs to the cutting process.
~8~
Further, the tool body 20 includes an extension 80 with a small diameter end 82 that is received by a chuck and an intermediate diameter 84 which slidably supports a gage plug of the type set forth in abo~e-identified United States Serial No. 126,922.
In operation, the arbor 16 is rotated to cause nut 56 and stud 52 to translate the arbor 16 axially into or out of body 20. Movement of the arbor 16 into the body 20 will increase the single pass stoc~ removal diameter of the cutting sections 14. Movement of the arbor 16 outwardly of the body 20 will reduce the diameter of the cutting sections 14. This adjustment feature is readily adaptable to automatic tool adjustment systems wherein arbor rotation and consequent translation is produced by directing a rotatable cornpensation shaft 86 through a bore 88 in the extension 80.
Another embodiment of the present invention is set forth in Figures 4-9. A presettable, fixed diameter, single pass tool 90 is shown. It includes a unitary body 92 having a plurality of tool recesses 94 located at circumferentially spaced locations. Each recess has spaced side walls 96,98 which support a pair of!inserts 100. More particularly, a side 102 of an abrasive insert 100 is supported by wall 96. An opposite side 104 of another insert 100 is supported by wall 98. Opposite sides 102,104 of the pair of inserts 1 no engages the sides 106,108 of an insert clamp ll0 Each insert clamp 110 is wedge shaped as shown in ~igures 5 and is held in place by a pair of screws 112,114 to positively secure the abrasive inserts 100 in place on the body 92 to establish a cutting section of fixed diameter as defined by cutting surfaces 116 on the inserts lOOo .. . .
- 12~ 9~C~
_9_ Adjustment of the fixed diameter is accomplished by relative translational movement between an inclined sur~ace 118 at the bottom of each recess 94 and an inclined ramp 120 on the base of each insert 100. To increase tool diameter, each clamp 110 is released by backing screws 112,114 from a shoulder 122 inboard of each clamp 110. The inserts 100 are released and are free to be translated axially to the right as viewed in Figure 5. Such movement will cause the inserts 100 to shift outwardly of the recesses 94.
Increase in tool diameter is produced by reverse movement of the inserts 100. Following adjustment the insert clamps 110 are wedged against the inserts to fix the desired diameter once the screws 112,114 are threaded into the body sufficiently to tightly engage shoulder 122.
The aforedescribed embodiments of Figures 1-3 and Figures 4-9 disclose fixed diameter cutting tools especially configured to produce single pass finishing operations for improved hole size, roundness and straightness.
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Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A single pass abrasive tool comprising a tool body, cutting section means fixedly connectable to said body to maintain a single pass cutting diameter for removing a predetermined amount of stock from a workpiece bore during single pass axial and rotary movement of the tool through the bore, said cutting section means including a plurality of abrasive stones each having an arcuate cutting face and each having surfaces thereon guidingly supported both axially and circumferentially by said body to counteract torque and thrust loading during removal of stock from the workpiece, each stone further including an axially inclined positioning surface, arbor means located within said body having a large diameter end extending from said body and including a tapered surface thereon engageable with each of said inclined positioning surfaces and relatively axially translatable with respect to said positioning surfaces to adjust the diameter of said cutting section means, and adjustment means to secure said cutting section means at an adjusted diameter whereby said cutting section means is presettable to an initial single pass cutting diameter and resettable to the single pass cutting diameter to compensate for wear.
2. A single pass abrasive tool comprising a tool body, cutting section means fixedly connectable to said body to maintain a preset single pass cutting diameter for removing a predetermined amount of stock from a workpiece bore during single pass axial and rotary movement of the tool through the bore and adjustable to other fixed single pass cutting diameters, said cutting section means including a plurality of abrasive stone means each having an arcuate cutting face and each having surfaces thereon guidingly supported both axially and circumferentially by said body to counteract torque and thrust loading during removal of stock from the workpiece, each stone means further including an axially inclined positioning surface, arbor means rotatable within said body including an arbor end accessible outside the tool body for rotation of said arbor and including a tapered arbor surface engageable with each of said inclined positioning surfaces and relatively axially translatable with respect to said positioning surfaces by rotation of said arbor to adjust the diameter of said cutting section means, spring means engaging said abrasive stone means at axially spaced, recessed locations for biasing the stone means radially against the arbor without interfering with contact between the stone means and workpiece, and adjustment means engaging the arbor for releasably securing it in the fixed adjusted position relative to the abrasive stone means and tool body during machining, whereby said abrasive stone means do not move radially outward or inward from the selected present single pass cutting diameter during machining and are resettable to the single pass cutting diameter to compensate for wear thereof and are adjustable to other single pass cutting diameters when the arbor is released from the fixed position.
3. In the tool of claim 2, said stone positioning surfaces each having an outboard end with a space there-between, a portion of the tapered surface of said arbor having a diameter which is larger than the diameter defined by the space between said outboard ends of said stone positioning surfaces and smaller than the diameter of the arcuate cutting faces of the cutting section means whereby the arbor can be releasably held in a fixed resettable position with respect to the abrasive stones to reset an initial single pass cutting diameter.
4. In the tool of claim 2, said arbor having a single cone shape axially positioned with respect to the tool body, the tapered surface of the cone shape engaging said inclined positioning surfaces on each of said abrasive stones to locate them to define the single pass cutting diameter, said body and said abrasive stones having outboard grooves therein, circular springs seated in said body grooves and said stone grooves to hold the stones inwardly of the body against said arbor during single pass axial and rotary movement of the tool through the bore, adjustable means for holding said arbor in place, said arbor and circular springs holding said stones therebetween to main-tain the single pass cutting diameter and to prevent radial movement of stones during single pass movement of the tool through the workpiece bore.
5. In the tool of claim 2, said tool having a unitary tool body with plural recess forming guide means to guide the stones both radially and axially thereby to define a cutting section of fixed form, each stone having multi-layers of abrasive material thereon, each of said position-ing surfaces having an inner tapered surface on each of the stones, a tapered arbor engaging said support surface where by wear of abrasive particles can be compensated for by arbor movement with respect to the stones to reset the tool size to an initial single pass stock removal diameter and wherein said multi-layers of grit material increase the useable abrasive grit volume to compensate wear.
6. In the tool of claim 2, each of the stones having at least one side surface in engagement with said body, two pairs of said stones having a space therebetween, a wedge shaped clamp located within said space, and means to secure said clamp to said body to fixedly secure said stones at pluralities of axial positions in said body, said inclined support surface and said positioning surface coactinq when said stones are at said plurality of axial positions to variably adjust the single pass cutting diameter of said cutting section means.
7. In the tool of claim 2, said support surface means including a rotatable surface, said adjustment means includ-ing rotary thread means operable upon rotation of said support surface means to axially position said support surface means.
8. In the tool of claim 2, said arbor means being relatively rotatable with respect to said body, a small diameter end on said arbor means, means including a screw thread on the small diameter end of said arbor means oper-able upon rotation of said arbor means to axially translate it with respect to said body.
9. In the tool of claim 7, said adjustment means including a plurality of serrations in said support surface means, and pin means in said body spring biased into one of said serrations to hold said support surface means with respect to said body.
10. In the tool of claim 8, said adjustment means including a plurality of serrations in the large diameter end of said arbor, and pin means in said body spring biased into one of said serrations to hold said arbor with respect to said body and to allow calibrated adjustment of tool diameter to compensate for wear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30500881A | 1981-09-24 | 1981-09-24 | |
| US305,008 | 1981-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1200980A true CA1200980A (en) | 1986-02-25 |
Family
ID=23178904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000411001A Expired CA1200980A (en) | 1981-09-24 | 1982-09-08 | Fixed diameter single pass abrasive tool with multi- layer grit inserts |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS58109265A (en) |
| CA (1) | CA1200980A (en) |
| DE (1) | DE3233856A1 (en) |
| FR (1) | FR2515547B1 (en) |
| GB (1) | GB2106431B (en) |
| IT (1) | IT1154324B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013204714A1 (en) * | 2013-03-18 | 2014-10-02 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honing process and honing tool |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7321746U (en) * | 1973-12-06 | Fromm Praezision Max Fromm | Machine reamer with adjustable blades | |
| FR536758A (en) * | 1920-11-16 | 1922-05-09 | Extendable reamer | |
| DE446519C (en) * | 1926-03-17 | 1927-07-04 | Mayer & Schmidt Schleifmaschin | Grinding tool for machining cylindrical hollow bodies |
| US1737193A (en) * | 1927-12-30 | 1929-11-26 | Leo J Loeffelman | Expansion reamer |
| US1828074A (en) * | 1928-03-24 | 1931-10-20 | Frederick W Roebbel | Method and tool for lapping or honing |
| US1978445A (en) * | 1930-02-19 | 1934-10-30 | Automotive Maintenance Mach Co | Cylinder grinding tool |
| US2383657A (en) * | 1943-05-22 | 1945-08-28 | Micromatic Hone Corp | Honing device |
| GB860624A (en) * | 1958-12-01 | 1961-02-08 | George H Alexander Machinery L | Rotary honing tools |
| GB1200085A (en) * | 1967-09-12 | 1970-07-29 | Delapena Honing Equipment Ltd | Improved honing apparatus |
| JPS5213033U (en) * | 1975-07-16 | 1977-01-29 |
-
1982
- 1982-08-26 IT IT49029/82A patent/IT1154324B/en active
- 1982-09-08 CA CA000411001A patent/CA1200980A/en not_active Expired
- 1982-09-09 GB GB08225688A patent/GB2106431B/en not_active Expired
- 1982-09-11 DE DE19823233856 patent/DE3233856A1/en not_active Withdrawn
- 1982-09-22 JP JP57164155A patent/JPS58109265A/en active Pending
- 1982-09-24 FR FR8216154A patent/FR2515547B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT8249029A0 (en) | 1982-08-26 |
| GB2106431B (en) | 1986-02-05 |
| JPS58109265A (en) | 1983-06-29 |
| FR2515547A1 (en) | 1983-05-06 |
| GB2106431A (en) | 1983-04-13 |
| IT1154324B (en) | 1987-01-21 |
| FR2515547B1 (en) | 1985-12-27 |
| DE3233856A1 (en) | 1983-04-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |