CA1079505A - Arrangement for mounting a cutter - Google Patents
Arrangement for mounting a cutterInfo
- Publication number
- CA1079505A CA1079505A CA302,366A CA302366A CA1079505A CA 1079505 A CA1079505 A CA 1079505A CA 302366 A CA302366 A CA 302366A CA 1079505 A CA1079505 A CA 1079505A
- Authority
- CA
- Canada
- Prior art keywords
- cutter
- spindle
- shank
- shoulder
- bore
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/26—Securing milling cutters to the driving spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
- B23B31/1071—Retention by balls
Abstract
TITLE OF THE INVENTION
ARRANGEMENT FOR MOUNTING A CUTTER
ABSTRACT OF THE DISCLOSURE
An arrangement and method for mounting a cutter body, especially a milling cutter, in which the cutter and power driven spindle have a common axis of rotation. An arbor shank is used to interconnect the cutter with the spindle with one end of the shank mating with a shouldered bore formed in one of the spindle and cutter. Radially movable clamp elements are provided to expand and engage the shoulder so as to urge one face of the cutter body into firm abutment with one end of the spindle. Keying means are also provided between the cutter body and the power driven spindle.
ARRANGEMENT FOR MOUNTING A CUTTER
ABSTRACT OF THE DISCLOSURE
An arrangement and method for mounting a cutter body, especially a milling cutter, in which the cutter and power driven spindle have a common axis of rotation. An arbor shank is used to interconnect the cutter with the spindle with one end of the shank mating with a shouldered bore formed in one of the spindle and cutter. Radially movable clamp elements are provided to expand and engage the shoulder so as to urge one face of the cutter body into firm abutment with one end of the spindle. Keying means are also provided between the cutter body and the power driven spindle.
Description
~9 7~
BACKGROUND OF TH~ INVENTION
This invention relates to milling machine arbors and adaptors therefor and specifically provides for a rigid and accurate mounting arrangement for cutter bodies, especially -~
milling cutters a~d power driven spindle. An ~asily operable, quick release mechanism allows ~he cu~ter body to be removed and replaced with a minim~lm of effort and tooling.
Prior art arrangements for mounting mill-ing cutters may be found in The Machiner~'s Handbook and other sLmilar sources.
10 These arrangements usually require the removal of several bolts ~ -and ~he like before removal and replacement of the cutter body can be achleved.
Pertinent to the patentability of the present invention . ..
~ are applicant firm's own patents and applications ~n tool holders '~ utilizing rad~ally movable clamp elements to achleve a rigid interconnec~ion between tool holders and their supports. ~:
B~IEF SUMM~RY OF THE INVENTION
According ~o the present invention, a shank is provided which interconnects a power driven spindle and a cutter body, 2C and ~he shank, cutter body and power driven spindle all have a .1 common axis of rotation. Cooperating elements Qf abutment.mea~s ~ and key~ng means are provided between ~he spindle and cut~er I body.
.1 , , .
One e~d of the shank is pro~ided with a perforation, preferably a central axi81 per~ora~ion communicating with radially outwardly extending bores. Carried in the perforation . .
are radially movable clæmp el~ments9 preferably ball-like .. ~
.
'' ' .... "; ~' s~s elements, that upon actuation will project beyond the envelope of the shank. A bore having a shoulder is formed in either the power driven spindle or the cutter body and is designed to mate with ~he one end of the shank carrying the radially outwardly movable clamp elements.
The shouldex of the bore is preferably shaped so that when the radially movable clamp elements engage said shoulder the cooperating elements of abutment means between the cutter body and the spindle are urged into a ~irm abutting relationship.
The other end of the shank which is not carrying the clamp elements is fixedly secured to the other of said spindle and said cuttex nok having a bore thereon. The other end of said shank may be secured by a drawbar to the power driven spindle or by ~hreadingly engaging an end cap member which holds the cutter body to the shank.
Actuator m~ans are movable axially within the perforation in the shank and preferably comprise a threaded screw element and a ball-like element that may be moved into and out of engagement with said radially movable clamp elements.
The shouldered bore is preferably formed with a ring-like element inserted in the bore with one surace of the ring-like element providing the shoulder in the bore and one end of the ring~like element abutting the one of the other of the cutter or arbor having the bore formed therein.
In accordance with one broad aspect, the invention relates to an arrangement for mounting a milling cutter and shank on a power driven spindle wherein the cutter~ shank and spindle have a common axis of rotation, ~he arrangement comprising; a milling cutter and a power driven spindle rigidly connected by a shank and having cooperating elements of abutment means and cooperating elements of keying means between ~ ' ~ 3-. ~ '';"'.
.. - - , fl~7~
said spindle and said cut~er, a bore having a shoulder formed in one of said spindle and said cutter, and radially movable clamp elements mounted in a perforation formed on one end of said shank, said clamp elements movable radially outwardly so as to abuttingly engage said shoulder in said bore and urge said cooperating elements of abutment means into engagement.
In accordance with another aspec~, the invention relates to a method of mounting a cutter on a power driven spindle for rotation on a common axis comprising the steps of interconnecting said spindle and said cutter with a shank fixed to one end of said spindle and cu~ter, abutting one side of said cutter to one end of said spindle, keying said cutter to said spindle, and engagj.ng a shouldered bore in one of said `
spindle and said cutter with radially movable clamp elements carried by said shank so as to urge said cutter and said spindle into firm abutment with one another.
The exact nature of the present invention will become more clearly apparent upon reference to the following detailed specification ~aken in connection with the accompanying drawings `
in which: .
.~ .
.:
-3a-~ ~ 7 ~ S~ S
Figure 1 is a side view par~ly in sec~ion showing a milling cutter and spindle according to the present invention with a connecting arbor extending therebetween.
Figure 2 is a sectional end view of the tool according to Figure 1.
Figure 3 is a view enlarging the key arrangement shown in Figure 1.
Figure 4 is a fragmentary view showing a modification.
Figure 5 is a view like Figure 1 showing a diferen~ sort of arbor arrangement.
Referring to the drawings somewhat more in de~ail, and wi~h particular reference to Figures 1 to 4, reference numeral 10 represen~s a power driven spindle having a central bore 12 terminating in an outwardly tapering portion 13. Tapering portion 13 is adapted for receiving a tapered arbor 14 which, at the end inside spindle 105 iS threadedly engaged by drawbar 16.
The other end of arbor 14 projects axially outwardly from the end of spindle 10 a~d is received in a central hole in cutter body 18 of a milling cu~ter. The outer end of arbor 14 has a cylindrical por~ion 20 ~hereon which is closely receivable inside central bore 22 in body 18.
Body 18 has an annular recess 24 formed therein which includes a~ inclined shoulder portion 26 engageable by clamp elem~n~s 28 ~n the form of balls located i~ respective, subs~an-tially radial bores 30 fo~med in the outer end of arbor 14.
The arbor includes a ~hreaded axial central perforation 32 , ~ .
~ 79505 within which is threaded a clamp screw 34 that engages the axially movable actuator ball 36 mounted in the bore.
It will be evident that rightward movement of actuator ball 36 will force clamp balls 28 radially outwardly into engagement with shoulder 26 thereby to olamp cutter body 18 fixedly in place with the surface 38 of the cutter ~ody firmly pressed against surface 40 on the end of the arbor~
Rotation of the body 18 on the central axis of arbor 14 and spindle 10~ the body may be provided with a keyway 42 while 10 a key 4~ is mounted in a notch 46 provided therefor in the :~
end of spindle lO with the key block being fixed in place by a screw 48. .
The arrangement provides for a s~mple and extrem01y rapid manner of mounting cutter bodies on spindle 10 and of removing cutter bodies therefrom. No clamp bolts or the like are ~ .
required and the illustrated arrangement will remain efective over a long period o time.
The shoulder 26 which is engaged by the clamp balls 28 may be provided by a hardened material 50 in the form o a ring : .
mounted in body 18 as shown in Figure 4. The hardened material 50 can be fixed to body 18 in any suitable manner in order :~
properly to transfer the clamping loads from clamp balls 28 to cut~er body 18.
Figure 5 shows a modifica~ion in which a spindle 60 has a central bore 62 therein with a ring, advan~ageously of hardened steel~ 64 mounted in the ou~er end of the bore and cl~mped ~ : therein as by clamp screw 66. Ring 64 has an i~clined shoulder il 68 formed on the inner end and internally is of a size to ' ~ ' ~Q7~
receive and closely embrace a shank 70 which has an axially outer end 72 fitted in a central bore 74 ln a cutter body 76.
A tubular clamp bolt 78 threads into the outer end of arbor 70 and clamps the cu~ter body against shoulder 80 formed on arbor 70.
The body 76 may include a keyway 82 into which a key 84 ; fixed on spindle 6Q extends to hold cutter body 76 against ; rotation on the spindle.
; Shank 70 h~s a central borP 86 whIch receives an actuator ball 88 and which cen~ral bore is intersec~ed by radial bores 87 each having a clamp ball 90 therein engageable with shoulder 68 when actuator ball 88 is moved to the right, Movement o~ :
the actuator ball is accomplished by a screw 92 mounted ln a ~ threaded bore 94 in arbor 70 and the outer end of which is -. .
; accessible through the cen~ral bore 96 in clamp screw 78 in which central bore m~y, to-advantage, be configured to receîve a drive wrench for rotation of clamp screw 78 which may also ; receive a wrench for turning clamp screw 78.
Modif~cations may be made within ~he scope of the appended claims.
. .
, -,' ~. : .
. 6 ~
~ "
.'"~.
BACKGROUND OF TH~ INVENTION
This invention relates to milling machine arbors and adaptors therefor and specifically provides for a rigid and accurate mounting arrangement for cutter bodies, especially -~
milling cutters a~d power driven spindle. An ~asily operable, quick release mechanism allows ~he cu~ter body to be removed and replaced with a minim~lm of effort and tooling.
Prior art arrangements for mounting mill-ing cutters may be found in The Machiner~'s Handbook and other sLmilar sources.
10 These arrangements usually require the removal of several bolts ~ -and ~he like before removal and replacement of the cutter body can be achleved.
Pertinent to the patentability of the present invention . ..
~ are applicant firm's own patents and applications ~n tool holders '~ utilizing rad~ally movable clamp elements to achleve a rigid interconnec~ion between tool holders and their supports. ~:
B~IEF SUMM~RY OF THE INVENTION
According ~o the present invention, a shank is provided which interconnects a power driven spindle and a cutter body, 2C and ~he shank, cutter body and power driven spindle all have a .1 common axis of rotation. Cooperating elements Qf abutment.mea~s ~ and key~ng means are provided between ~he spindle and cut~er I body.
.1 , , .
One e~d of the shank is pro~ided with a perforation, preferably a central axi81 per~ora~ion communicating with radially outwardly extending bores. Carried in the perforation . .
are radially movable clæmp el~ments9 preferably ball-like .. ~
.
'' ' .... "; ~' s~s elements, that upon actuation will project beyond the envelope of the shank. A bore having a shoulder is formed in either the power driven spindle or the cutter body and is designed to mate with ~he one end of the shank carrying the radially outwardly movable clamp elements.
The shouldex of the bore is preferably shaped so that when the radially movable clamp elements engage said shoulder the cooperating elements of abutment means between the cutter body and the spindle are urged into a ~irm abutting relationship.
The other end of the shank which is not carrying the clamp elements is fixedly secured to the other of said spindle and said cuttex nok having a bore thereon. The other end of said shank may be secured by a drawbar to the power driven spindle or by ~hreadingly engaging an end cap member which holds the cutter body to the shank.
Actuator m~ans are movable axially within the perforation in the shank and preferably comprise a threaded screw element and a ball-like element that may be moved into and out of engagement with said radially movable clamp elements.
The shouldered bore is preferably formed with a ring-like element inserted in the bore with one surace of the ring-like element providing the shoulder in the bore and one end of the ring~like element abutting the one of the other of the cutter or arbor having the bore formed therein.
In accordance with one broad aspect, the invention relates to an arrangement for mounting a milling cutter and shank on a power driven spindle wherein the cutter~ shank and spindle have a common axis of rotation, ~he arrangement comprising; a milling cutter and a power driven spindle rigidly connected by a shank and having cooperating elements of abutment means and cooperating elements of keying means between ~ ' ~ 3-. ~ '';"'.
.. - - , fl~7~
said spindle and said cut~er, a bore having a shoulder formed in one of said spindle and said cutter, and radially movable clamp elements mounted in a perforation formed on one end of said shank, said clamp elements movable radially outwardly so as to abuttingly engage said shoulder in said bore and urge said cooperating elements of abutment means into engagement.
In accordance with another aspec~, the invention relates to a method of mounting a cutter on a power driven spindle for rotation on a common axis comprising the steps of interconnecting said spindle and said cutter with a shank fixed to one end of said spindle and cu~ter, abutting one side of said cutter to one end of said spindle, keying said cutter to said spindle, and engagj.ng a shouldered bore in one of said `
spindle and said cutter with radially movable clamp elements carried by said shank so as to urge said cutter and said spindle into firm abutment with one another.
The exact nature of the present invention will become more clearly apparent upon reference to the following detailed specification ~aken in connection with the accompanying drawings `
in which: .
.~ .
.:
-3a-~ ~ 7 ~ S~ S
Figure 1 is a side view par~ly in sec~ion showing a milling cutter and spindle according to the present invention with a connecting arbor extending therebetween.
Figure 2 is a sectional end view of the tool according to Figure 1.
Figure 3 is a view enlarging the key arrangement shown in Figure 1.
Figure 4 is a fragmentary view showing a modification.
Figure 5 is a view like Figure 1 showing a diferen~ sort of arbor arrangement.
Referring to the drawings somewhat more in de~ail, and wi~h particular reference to Figures 1 to 4, reference numeral 10 represen~s a power driven spindle having a central bore 12 terminating in an outwardly tapering portion 13. Tapering portion 13 is adapted for receiving a tapered arbor 14 which, at the end inside spindle 105 iS threadedly engaged by drawbar 16.
The other end of arbor 14 projects axially outwardly from the end of spindle 10 a~d is received in a central hole in cutter body 18 of a milling cu~ter. The outer end of arbor 14 has a cylindrical por~ion 20 ~hereon which is closely receivable inside central bore 22 in body 18.
Body 18 has an annular recess 24 formed therein which includes a~ inclined shoulder portion 26 engageable by clamp elem~n~s 28 ~n the form of balls located i~ respective, subs~an-tially radial bores 30 fo~med in the outer end of arbor 14.
The arbor includes a ~hreaded axial central perforation 32 , ~ .
~ 79505 within which is threaded a clamp screw 34 that engages the axially movable actuator ball 36 mounted in the bore.
It will be evident that rightward movement of actuator ball 36 will force clamp balls 28 radially outwardly into engagement with shoulder 26 thereby to olamp cutter body 18 fixedly in place with the surface 38 of the cutter ~ody firmly pressed against surface 40 on the end of the arbor~
Rotation of the body 18 on the central axis of arbor 14 and spindle 10~ the body may be provided with a keyway 42 while 10 a key 4~ is mounted in a notch 46 provided therefor in the :~
end of spindle lO with the key block being fixed in place by a screw 48. .
The arrangement provides for a s~mple and extrem01y rapid manner of mounting cutter bodies on spindle 10 and of removing cutter bodies therefrom. No clamp bolts or the like are ~ .
required and the illustrated arrangement will remain efective over a long period o time.
The shoulder 26 which is engaged by the clamp balls 28 may be provided by a hardened material 50 in the form o a ring : .
mounted in body 18 as shown in Figure 4. The hardened material 50 can be fixed to body 18 in any suitable manner in order :~
properly to transfer the clamping loads from clamp balls 28 to cut~er body 18.
Figure 5 shows a modifica~ion in which a spindle 60 has a central bore 62 therein with a ring, advan~ageously of hardened steel~ 64 mounted in the ou~er end of the bore and cl~mped ~ : therein as by clamp screw 66. Ring 64 has an i~clined shoulder il 68 formed on the inner end and internally is of a size to ' ~ ' ~Q7~
receive and closely embrace a shank 70 which has an axially outer end 72 fitted in a central bore 74 ln a cutter body 76.
A tubular clamp bolt 78 threads into the outer end of arbor 70 and clamps the cu~ter body against shoulder 80 formed on arbor 70.
The body 76 may include a keyway 82 into which a key 84 ; fixed on spindle 6Q extends to hold cutter body 76 against ; rotation on the spindle.
; Shank 70 h~s a central borP 86 whIch receives an actuator ball 88 and which cen~ral bore is intersec~ed by radial bores 87 each having a clamp ball 90 therein engageable with shoulder 68 when actuator ball 88 is moved to the right, Movement o~ :
the actuator ball is accomplished by a screw 92 mounted ln a ~ threaded bore 94 in arbor 70 and the outer end of which is -. .
; accessible through the cen~ral bore 96 in clamp screw 78 in which central bore m~y, to-advantage, be configured to receîve a drive wrench for rotation of clamp screw 78 which may also ; receive a wrench for turning clamp screw 78.
Modif~cations may be made within ~he scope of the appended claims.
. .
, -,' ~. : .
. 6 ~
~ "
.'"~.
Claims (12)
1. An arrangement for mounting a milling cutter and shank on a power driven spindle wherein the cutter, shank and spindle have a common axis of rotation, the arrangement comprising; a milling cutter and a power driven spindle rigidly connected by a shank and having cooperating elements of abutment means and cooperating elements of keying means between said spindle and said cutter, a bore having a shoulder formed in one of said spindle and said cutter, and radially movable clamp elements mounted in a perforation formed on one end of said shank, said clamp elements movable radially outwardly so as to abuttingly engage said shoulder in said bore and urge said cooperating elements of abutment means into engagement.
2. The arrangement according to Claim 1 in which a central axial perforation is formed in one end of said shank and communicates with radially outwardly extending bores having said clamp elements located therein, and an actuator element located and axially movable within said perforation.
3. The arrangement according to Claim 2 in which at least one of said clamp elements and said shoulder have abutment surfaces that converge toward said cooperating elements of abutment means between said spindle and said cutter.
4. The arrangement according to Claim 1 in which one of said clamp elements and said shoulder have abutment surfaces that converge toward said cooperating elements of abutment means between said spindle and said cutter.
5. The arrangement according to Claim 3 in which said shoulder has surfaces which converge toward said cooperating elements of abutment means between said spindle and said cutter and said clamp elements have curved surfaces for engagement with said shoulder.
6. The arrangement according to Claim 5 wherein said clamp elements have spherical surfaces to engage said shoulder.
7. The arrangement according to Claim 6 wherein said clamp elements are comprised of metal balls having a first diameter and said actuator element is comprised of a metal ball having a diameter larger than said first diameter.
8. The arrangement according to Claim 1 in which said bore and shoulder are comprised of a bore of one given dimension and a tubular ring, having an outside dimension approximately equal to said one given dimension, interfitted in said bore and having said shoulder formed on one end thereof.
9. The arrangement according to Claim 1 which further comprises said bore and shoulder formed in said cutter and said shank comprising a drawbar and tapering inwardly to an end opposite said one end of said shank.
10. The arrangement according to Claim 1 which further comprises said shouldered bore formed in said spindle and the other end of said one end of said shank having an end cap threadingly engaged therewith, said end cap clampingly engaging said cutter to said shank.
11. A method of mounting a cutter on a power driven spindle for rotation on a common axis comprising the steps of interconnecting said spindle and said cutter with a shank fixed to one end of said spindle and cutter, abutting one side of said cutter to one end of said spindle, keying said cutter to said spindle, and engaging a shouldered bore in one of said spindle and said cutter with radially movable clamp elements carried by said shank so as to urge said cutter and said spindle into firm abutment with one another.
12. The method according to Claim 11 which further comprises sloping the shoulders of said bore so that they converge toward the abutment surfaces between said spindle and said cutter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80591677A | 1977-06-13 | 1977-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079505A true CA1079505A (en) | 1980-06-17 |
Family
ID=25192866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,366A Expired CA1079505A (en) | 1977-06-13 | 1978-05-01 | Arrangement for mounting a cutter |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1079505A (en) |
| DE (2) | DE7816188U1 (en) |
| GB (1) | GB1587692A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112580A (en) * | 2016-08-31 | 2016-11-16 | 刘惠强 | A kind of novel milling cutter stationary fixture |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE427732B (en) * | 1979-09-20 | 1983-05-02 | Sandvik Ab | tool holder |
| DE10344381A1 (en) * | 2003-09-23 | 2005-05-04 | Hauni Maschinenbau Ag | Conveyor drum with clamping device |
| AT507775B1 (en) | 2009-01-21 | 2010-08-15 | Felder Kg | FRICTIONAL ROTARY TOOL FASTENING DEVICE |
-
1978
- 1978-05-01 CA CA302,366A patent/CA1079505A/en not_active Expired
- 1978-05-04 GB GB1763378A patent/GB1587692A/en not_active Expired
- 1978-05-30 DE DE19787816188 patent/DE7816188U1/en not_active Expired
- 1978-05-30 DE DE19782823609 patent/DE2823609A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112580A (en) * | 2016-08-31 | 2016-11-16 | 刘惠强 | A kind of novel milling cutter stationary fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1587692A (en) | 1981-04-08 |
| DE2823609A1 (en) | 1978-12-14 |
| DE7816188U1 (en) | 1980-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |