SE1550472A1 - Chuck arrangement - Google Patents
Chuck arrangement Download PDFInfo
- Publication number
- SE1550472A1 SE1550472A1 SE1550472A SE1550472A SE1550472A1 SE 1550472 A1 SE1550472 A1 SE 1550472A1 SE 1550472 A SE1550472 A SE 1550472A SE 1550472 A SE1550472 A SE 1550472A SE 1550472 A1 SE1550472 A1 SE 1550472A1
- Authority
- SE
- Sweden
- Prior art keywords
- chuck
- jaw
- clamping
- chuckjaw
- backing
- Prior art date
Links
Classifications
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
- B23B31/16279—Fixation on the master jaw
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/1261—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in a radial plane
- B23B31/1269—Details of the jaws
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
-
- 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
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
- B23B31/16275—Form of the jaws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/19—Radially reciprocating jaws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/19—Radially reciprocating jaws
- Y10T279/1986—Jaws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Description
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The present invention solves the above described problems.
Hence, the invention relates to a backing chuck jaw part having a first central axis and a
contact surface perpendicular to said first central axis, which backing chuckjaw part is ar-
ranged to engage with a clamping chuck jaw part having a second central axis, in which
engagement the contact surface is arranged in contact with a corresponding contact surface
on said clamping chuck jaw part so as to together form a chuck jaw for a chuck, which back-
ing chuckjaw part is characterised in that the backing chuck jaw part is manufactured from
a harder metal material than a metal material from which the clamping chuck jaw part is
manufactured, in that a cross-section of the backing chuckjaw part along said first central
axis comprises a convex structure, and in that the convex structure is arranged to engage
with a corresponding concave structure of a cross-section along said second central axis of
the clamping chuckjaw part so that the said concave structure is permanently deformed as
a result of an engagement between said convex and said concave structures resulting from
the backing and clamping chuck jaw parts first being arranged in a contacting orientation,
in with the first and second central axes, respectively, are aligned with each other and the
respective contact surfaces facing each other, and thereafter being pressed together into
an engagement orientation, in which contact is established between said contact surfaces.
The invention also relates to a clamping chuckjaw part having a second central axis and a
contact surface perpendicular to said second central axis, which clamping chuckjaw part is
arranged to engage with a backing chuck jaw part having a first central axis, in which en-
gagement the contact surface is arranged in contact with a corresponding contact surface
on said backing chuck jaw part so as to together form a chuckjaw for a chuck, which clamp-
ing chuckjaw part is characterised in that the backing chuck jaw part is manufactured from
a harder metal material than a metal material from which the clamping chuck jaw part is
manufactured, in that a cross-section ofthe clamping chuckjaw part along said second cen-
tral axis comprises a concave structure, and in that the concave structure is arranged to
engage with a corresponding convex structure of a cross-section along said first central axis
Application text 2015-04-21 150033SE
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of the backing chuck jaw part so that the said concave structure is arra nged to be perma-
nently deformed as a result of an engagement between said convex and said concave struc-
tures resulting from the backing and clamping chuck jaw parts first being arranged in a con-
tacting orientation, in with the first and second central axes, respectively, are aligned with
each other and the respective contact surfaces facing each other, and thereafter being
pressed together into an engagement orientation, in which contact is established between
said contact surfaces.
Furthermore, the invention relates to a method for operating a chuck, which method is
characterised in that the method comprises the steps a) providing said at least two backing
chuckjaw parts on the chuck; b) providing said at least two clamping chuckjaw parts, the
respective concave structure of which has not yet been permanently deformed as a conse-
quence of engagement with a backing chuck jaw part; c) mounting said clamping chuck jaw
parts on said backing chuckjaw parts, and bringing the respective chuckjaw parts into re-
spective engagement with their respective contact surfaces in direct contact with each
other so that the said respective concave structure is permanently deformed by the corre-
sponding convex structure of the respective backing chuck jaw part; d) clamping a work-
piece using the chuck; e) releasing the workpiece; f) demounting the clamping chuck jaw
parts from the backing chuck jaw parts; g) again mounting the clamping chuck jaw parts on
the same respective backing chuck jaw parts; and h) again clamping the same or another
workpiece using the chuck.
ln the following, the invention will be described in detail, with reference to exemplifying
embodiments ofthe invention and to the enclosed drawings, wherein:
Figure 1 is a perspective view from the top of a chuck jaw according to the present inven-
tion;
Figure 2 is a perspective view from the bottom of the chuck jaw of figure 1;
Figure 3 is a perspective view similar to the one shown in figure 1, but with a cross-section
removed;
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Figure 4 shows the chuck jaw of figure 3, with the same cross-section removed, in a detail
perspective view;
Figure 5 is a perspective view from above of a clamping chuck jaw part according to the
present invention with said cross-section removed;
Figure 6 is a detail perspective view from below showing the clamping chuck jaw part of
figure 5;
Figure 7 is a perspective view from above of a backing chuck jaw part according to the pre-
sent invention with said cross-section removed;
Figure 8 is a view which is similar to the one shown in figure 7, but without any removed
cross-section;
Figure 9 is a top view of a chuck according to the present invention; and
Figure 10 is a flowchart illustrating a method according to the invention.
All figures show the same chuck, chuckjaw and chuckjaw parts, respectively, from different
angles and with different component parts removed and/or with the same cross-section
removed. Furthermore, all figures share the same set of reference numerals.
ln the following description, it is referred to all figures 1-9 as applicable.
A chuck 10 according to the present invention comprises a number of chuck jaws 100, which
may or may not be identical and are used to clamp a workpiece 12 from one respective
radial direction ofthe chuck 10 each. Each chuckjaw 100 may comprise a backing chuckjaw
part 120 and a clamping chuck jaw part 110. The backing chuck jaw part 120 is fastened to
a main body 11 ofthe chuck 10. The clamping chuck jaw part 110 is fastened to the respec-
tive backing chuckjaw part 120 and contacts the workpiece 12 when clamping the latter.
According to the invention, the backing chuck jaw part 120 has a first central axis A1 and a
contact surface 123 perpendicular to the first central axis A1. Furthermore, according to the
invention the backing chuck jaw part 120 is arranged to engage with a respective clamping
chuck jaw part 110 according to the invention, which has a second central axis A2 and a
respective contact surface 113 which is perpendicular to the second central axis A2.
Application text 2015-0411 150033SE
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ln the said engagement between the two respective chuck jaw parts 110, 120, the contact
surface 123 is arranged in contact with the corresponding contact surface 113, so that the
backing chuck jaw part 120 together with the clamping chuck jaw part 110 forms a chuck
jaw 100 according to the invention for use as a part ofa chuck 10 according to the invention
(see in particular figure 9).
Further according to the invention, the backing chuckjaw part 120 is manufactured from a
harder metal material than a metal material from which the clamping chuckjaw part 110 is
manufactured.
|\/loreover, there is defined firstly a contacting orientation of the clamping chuck jaw part
110 with respect to the backing chuck jaw part 120, as well as an engagement orientation
of the clamping chuckjaw part 110 with respect to the backing chuckjaw part 120. ln both
these orientations, the said first A1 and second A2 axes are aligned and preferably overlap-
ping, and the said contact surfaces 113, 123 face each other, and are preferably parallel one
to the other.
Secondly, there is defined a cross-section C of the chuck jaw 100, and hence of both the
backing 120 and the clamping 110 chuck jaw parts, when in said contacting orientation as
well as when in said engagement orientation. The cross-section C runs along said first A1
and second A2 axes in said contacting and engagement orientations, in other words the axis
A1, A2 both extend within the cross-section C plane. The cross-section C illustrated in the
figures constitutes an example of such a cross-section.
Then, according to the invention, the cross-section C of the backi ng chuckjaw pa rt 120 com-
prises a convex structure 126 and the cross-section C of the clamping chuck jaw part 110
comprises a corresponding concave structure 116. To be clear, the convex structure 126 is
a two-dimensional geometric structure generated by a corresponding three-dimensional
structure which is part of the backing ch uckjaw part and which, when seen in the said cross-
section C, generates the convex structure 126. As such, the said three-dimensional structure
Application text 2015-0411 150033SE
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may very well be, and preferably is, a convex structure as well, at least locally convex. The
corresponding is true regarding the structure 116 or the clamping chuck jaw part 110, but
with concave two- and three-dimensional structures instead of convex ones.
ln the above mentioned contacting orientation, the convex structure 126 and the concave
structure 116 preferably come into direct contact with each other, thus stopping the chuck
jaw parts 110, 120 from moving further towards each other along the axes A1, A2 without
using a certain force strong enough to result in permanent deformation of the material
forming the concave structure 116.
When a pressing force is applied to the chuck jaw parts 110, 120, pressing them towards
one another from the said contacting orientation along the axes A1, A2, the concave struc-
ture 116 is permanently deformed as a result ofthe engagement between the convex struc-
ture 126 and the concave structure 116. ln other words, a permanent dent, track or the like
is formed in the relatively softer material ofthe concave structure 116 by the convex struc-
ture 126 pressing against a surface 116a of the concave structure 116. When the contact
surfaces 113, 123 are fully pressed together so that contact is established between them,
the engagement orientation has been achieved.
Since the deformation ofthe clamping chuckjaw part 110 is permanent, when the clamping
chuckjaw part 110 is detached from the backing chuckjaw part 120, from the said engage-
ment orientation, and then re-attached at a later point in time, no or only very limited pres-
sure will be required to again arrange the chuck jaw parts 110, 120 in the engagement ori-
entation. Furthermore, it is preferred that the geometry of the convex structure 126 in com-
bination with the geometry of the concave structure 116 is arranged so that the chuck jaw
parts 110, 120, when again being brought together along the axes A1, A2 with the contact
faces 113, 123 facing each other, again end up in the engagement orientation in a predict-
able manner, for instance by using guides (providing full predictability in three directions)
or by having circular symmetric structures 116, 126 (see below) (providing predictability in
two directions but variability along a rotational direction).
Application text 2015-0411 150033SE
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As a result, a chuckjaw 100 according to the invention will predictably provide the same, or
selectively partially the same, clamping geometry in relation to a workpiece 12 even after
removal and reinstallation ofthe clamping chuck part device 110. lt is even possible to use
the same backing chuck jaw part 120 with several different clamping chuck jaw parts 110
with the result that one and the same clamping chuck jaw part 110 predictably yields a
desired clamping geometry every time it is used. Consequently, there is no longer any need
for recalibration of clamping chuck jaw parts 110.
ln particular, the fact that the two contact surfaces 113, 123 have contact in the said en-
gagement orientation provides excellent axial precision of the chuckjaw 100.
According to a preferred embodiment, the backing chuckjaw part 120 is manufactured from
annealed steel having a hardness of at least 500 HB, preferably between 550 and 600 HB.
Herein, ”HB” relates to the standard Brinell hardness number. lt is at least the surface part,
exposed to the engagement described herein, which is made from such material. The cor-
responding is true regarding the clamping chuck jaw part 110.
The clamping ch uckjaw part 110, on the other hand, is preferably either manufactured from
a steel alloy having a hardness of at the most 250 HB, preferably between 100 and 250 HB,
or from an aluminium alloy having a hardness of at the most 150 HB, preferably at the most
100 HB, preferably between 75 and 150 HB.
As mentioned above and as illustrated in the figures, it is preferred that both the convex
structure 126 and the concave structure 116, respectively, is rotationally sym metric about
the first A1 and second A2 central axis, respectively. lt is, however, possible that the convex
126 and/or concave 116 structure is or are only partly rotationally symmetric, such as com-
prising convex or concave circular sections interrupted by straight corners, or the like, de-
pending on the particular indexing needs.
Application text 2015-04-21 150033SE
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Such complete or part-wise symmetry achieves that the said permanent material defor-
mation also becomes rotationally symmetric about the second central axis A2, and as a re-
sult the clamping chuck jaw part 110 can be rotated about the first axis A1 and in relation
to the backing chuck jaw part 120 while still achieving full contact between the convex 126
and the concave 116 structures when in the engagement orientation at different rotational
angles. This provides predictable and accurate clamping orientation foran indexable clamp-
ing chuckjaw part 110.
Namely, it is preferred that the chuck jaw 100 is indexed, so that said engagement between
the chuck jaw parts 110, 120 is arranged so that the clamping chuck jaw part 110 can be
turned in relation to the backing chuck jaw part 120 about the second central axis A2, so as
to assume one of a number of predetermined rotational positions, and that the clamping
chuck jaw part 110 is arranged with different clamping radii for different ones of said rota-
tional positions. Such different clamping radii are illustrated in the figures, in which the
clamping chuck jaw part 110 comprises sections 111 with larger radius and sections 112
with smaller radius.
According to a preferred embodiment illustrated in the figures, the convex structure 126
comprises an edge, preferably an edge which is at least partly circular symmetric about the
fist axis A1, with a radius of curvature of between 1 and 5 mm, preferably of between 2 and
3 mm, preferably ofabout 2.5 mm.
According to a further preferred embodiment, the concave structure 116 comprises a sur-
face 116a, preferably a conical surface, which is inclined in relation to the second central
axis A2, preferably with an angle of inclination A, between an axis which is parallel to the
second central axis A2 and the surface 116a, of between 15° and 40°, so that the convex
structure 126 strikes the said surface 116a when the chuck jaw parts 110, 120 are brought
into said contact orientation. This embodiment is particularly useful in combination with
the edge with certain curvature radius, as described above.
Application text 2015-04-21 150033SE
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According to one preferred embodiment, the clamping chuckjaw part 110 is manufactured
from a steel alloy, such as the one described above, in which case the angle of inclination A
is between 18° and 26°, preferably about 22°. According to an alternative embodiment, the
clamping chuck jaw part 110 is manufactured from an aluminium alloy, such as the one
described above, in which case the angle of inclination is between 26° and 34°, preferably
about 30°. Preferably, the surface 116a is straight or substantially straight as seen in the
cross-section C.
As further illustrated in the figures, it is preferred that the backing chuckjaw part 120 com-
prises an indentation 125, which is preferably rotationally symmetric about the first central
axis A1, and the clamping chuck jaw part 110 comprises a corresponding protrusion 125,
which is preferably rotationally symmetric about the second central axis A2. Then, it is pre-
ferred that an envelope surface of the said indentation 125 is arranged to come into direct
contact with a corresponding envelope surface of the said protrusion 115 when the chuck
jaw parts 110, 120 are in the said engagement orientation, preferably in a way so that the
relative position of the clamping chuck jaw part 110 in relation to the backing chuck jaw
part 120, in a plane perpendicular to the second central axis A2, is locked when the chuck
jaw parts 110, 120 are in said engagement orientation. This provides for excellent radial
precision of the achieved clamping action.
According to a particularly preferred embodiment, when the said envelope surfaces are ro-
tational symmetric about the respective first A1 and second A2 central axis, the said enve-
lope surfaces are arranged to come into direct contact along their entire respective angular
extent when the chuckjaw parts 110, 120 are in the said engagement orientation. This is a
simple yet robust way to achieve the said radial precision.
ln particular, it is preferred that the said indentation 125 has a conical shape, narrowing
from the contact surface 123 inwards, and that the protrusion 115 has a correspondingly
conical shape, so that said full direct contact is established as the chuck jaw parts 110, 120
are pressed together into the said engagement orientation.
Application text 2015-0411 150033SE
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lO
Preferably, the said convex structure 126 is constituted by an outer delimiting edge of said
indentation 125. Correspondingly, it is preferred that the said concave structure 116 is con-
stituted by an inner base corner of the said protrusion 115.
ln an alternative embodiment, the indentation 125 and the corresponding protrusion 115
are not conical, but cylindrical. This makes production simpler.
According to a preferred embodiment, the chuck jaw parts 110, 120 are geometrically ar-
ranged so that a certain play, of between 0.05 and 0.25 mm, preferably between 0.10 and
0.15 mm, most preferably about 0.12 mm, is present between the said contact surfaces
113, 123 when the chuck jaw parts 110, 120 are arranged in said contact orientation. Con-
sequently, it is this play which is then lessened and finally eliminated as the chuckjaw parts
110, 120 move from the contacting orientation to the engagement orientation by force.
Tests have shown that a play of this magnitude provides a sufficient permanent defor-
mation in order to provide high precision in a predictable way, while still being able to easily
move the chuck jaw parts 110, 120 into the engagement orientation during the first time of
installation.
Furthermore, it is preferred that the chuckjaw 100 also comprises a screw means 130, ar-
ranged to impart the force pressing the chuck jaw parts 110, 120 towards each other into
the engagement orientation. The screw means 130 preferably runs in a centrally arranged
through hole 114 of the clamping chuck jaw part 110, which through hole 114 is provided
with a shoulder, and is fastened in a corresponding, threaded, central through hole 124 of
the backing chuckjaw part 120, thereby pulling the chuckjaw parts 110, 120 together. The
chuckjaw 100 is then preferably arranged so that a screw means 130 moment of between
60-90 Nl\/I, preferably between 70-75 NM, is required for the said contact to be established.
Tests have proven that this provides an adequate permanent material deformation while at
the same time providing a reasonable work ergonomics and minimized risk of undesired
material damage.
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ll
Hence, a chuckjaw 100 according to the invention comprises a backing chuck jaw part 120
as described above, and a clamping chuck jaw part 110 also as described above. Further-
more, a chuck 10 according to the present invention preferably comprises at least two, pref-
erably at least three, such chuck jaws 100, and is further associated with a third central axis
A3 (out from paper in figure 9). Preferably, the chuck 10 further comprises a respective
radial setting means (illustrated schematically as 121) for each respective chuck jaw 100,
arranged to act on the backing chuck jaw part 120 of the chuck jaw 100 in question and
allow it to be set radially in relation to said third central axis A3 to a desired location in
relation to the clamped workpiece 12.
lt is noted that figures 1-4 illustrate the above described engagement orientation of the
chuck jaw parts 110, 120, in which the contact surfaces 113, 123 are in full contact. lt is
preferred that there is a play 101 in this case, ofat least 1 mm, between an end ofthe above
described protrusion 115 and a bottom ofthe above described indentation 125.
Figures 7 and 8 also show areas 127 of removed material, in order to decrease the weight
ofthe backing chuckjaw part 120.
Figure 10 illustrates the method steps of a method according to the present invention.
ln a first step, the at least two, preferably three, backing chuck jaw parts 120 of the chuck
10 are provided and mounted on the chuck 10.
ln a second step, the at least two clamping chuckjaw parts 110 are provided.
ln a third step, the said clamping ch uckjaw parts 110 are mounted on the respective backing
chuck jaw parts 120. ln this step, the respective concave structures 116 of the clamping
chuckjaw parts 110 have not yet been permanently deformed as a consequence of engage-
ment with the corresponding backing chuck jaw part 120. ln other words, the respective
chuckjaw part 110, 120 pairs are in their respective contacting orientation after this second
Application text 2015-0411 150033SE
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12
step, and the clamping chuck jaw part 110 has not been in the engagement orientation
before.
ln a fourth step, the at least two respective chuckjaw part pairs are brought into the above
described engagement orientation in relation to the other. Hence, each respective chuck
jaw part 110, 120 is brought into a respective engagement with their respective contact
surfaces 113, 123 in direct contact with each other, so that the said respective concave
structure 116 is permanently deformed according to what has been described above.
ln a fifth step, a first workpiece 12 is clamped using the chuck 10, and is thereby fixed in a
predetermined position for machining or the like. This step preferably also comprises a cal-
ibration substep, in which the backing chuck jaw parts 120 are adjusted in a respective di-
rection perpendicular to the third axis A3 so as to achieve said predetermined position. With
a chuck 10 according to the present invention, such a calibration needs only be done once
for each set of clamping chuck jaw parts 110. The next time a workpiece is to be clamped,
the adjustment of the chuck jaws 100 along the direction perpendicular to the third axis A3
can be set directly, preferably automatically, without need for separate calibration.
ln sixth and seventh steps, the position ofthe respective ch uckjaw 100 when the first work-
piece 12 is clamped by the chuck 10 is noted, as well as the positions ofthe backing chuck
jaw parts 120, in the said respective direction perpendicular to the third axis A3. At least
the latter noting can be accomplished automatically, by a CNC machine or the like, in which
the chuck 10 is used, measuring and storing electronically the adjustment positions of the
backing chuckjaw parts 120.
ln an eighth step, the first workpiece 12 is released.
ln a ninth step, the clamping chuckjaw parts 110 are demounted from the respective back-
ing chuckjaw parts 120.
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13
ln a tenth step, which may be performed at a later point, and in particular after use of the
chuck 10 with its backing chuck jaw parts 120 for similar or other purposes and together
with other sets of clamping chuck jaw parts, the originally used set of clamping chuck jaw
parts 110 are again mounted on the same respective corresponding backing chuckjaw parts
120.
Finally, in an eleventh step, the same workpiece 12, or another workpiece, is again clamped
by the chuck 10.
Preferably, in the clamping in the tenth step, the respective chuckjaw 110 is caused to re-
turn to the position, in the respective direction perpendicular to the third axis A3, previously
noted in the seventh step.
However, at least one clamping chuck jaw part 110 may be rotated about its respective
second central axis A2 as compared to its respective position after the fourth step, depend-
ing on the geometry of the workpiece which is clamped in the eleventh step.
Above, preferred embodiments have been described. However, it is apparent to the skilled
person that many modifications can be made to the described embodiments without de-
parting from the basic idea of the invention.
For instance, the shape ofthe chuckjaw parts 110, 120 may differ from the ones illustrated
in the figures.
Also, the backing chuck jaw parts 120 may be more complex, or feature other types of ad-
justment means, than illustrated in the figures and described above.
Hence, the invention is not to be considered limited to the described embodiments, but
may be varied across the full scope of the enclosed claims.
Application text 2015-04-21 150033SE
Claims (19)
1. Chuckgrundback (120) med en första central axel (A1) och en kontaktyta (123) som är vinkelrät mot sagda första centrala axel, vilken grundback är anordnad att gripa in i en över- back (110) med en andra central axel (A2), i vilket ingrepp kontaktytan är anbringad i kon- takt med en motsvarande kontaktyta (113) på sagda överback så att de tillsammans bildar en chuckkäft för en chuck (10), k ä n n e t e c k n a d a v att grundbacken är till- verkad av en hårdare metall än ett metallmaterial från vilket överbacken ärtillverkad, av att ett tvärsnitt (C) hos grundbacken längs med sagda första centrala axel innefattar en konvex struktur (126), och av att den konvexa strukturen är anordnad att gripa in i en motsvarande konkav struktur (116) hos ett tvärsnitt (C) längs med sagda andra centrala axel hos över- backen, så att den konkava strukturen permanent deformeras som resultat av ett ingrepp mellan sagda konvexa och sagda konkava strukturer, vilket resulterar från att grundbacken och överbacken först placeras i en inbördes kontakterande orientering, i vilken de första respektive andra axlarna är i linje med varandra och de respektive kontaktytorna vetter mot varandra, och därefter pressas samman till en ingreppsorientering, i vilken kontakt etable- rats mellan sagda kontaktytor.
2. Chuckgrundback (120) enligt krav 1, k ä n n e t e c k n a d a v att grund- backen är tillverkad av glödgat stål som har en hårdhet av åtminstone 250 HB, företrädesvis mellan 250 och 300 HB.
3. Chucköverback (110) med en andra central axel (A2) och en kontaktyta (113) som är vinkelrät mot sagda andra centrala axel, vilken överback är anordnad att gripa in i en grund- back (120) med en första central axel (A1), i vilket ingrepp kontaktytan är anbringad i kon- takt med en motsvarande kontaktyta (123) på sagda grundback så att de tillsammans bildar en chuckkäft för en chuck (10), k ä n n e t e c k n a d a v att grundbacken är till- verkad av en hårdare metall än ett metallmaterial från vilket överbacken ärtillverkad, av att ett tvärsnitt (C) hos överbacken längs med sagda andra centrala axel innefattar en konkav struktur (116), och av att den konkava strukturen är anordnad att gripa in i en motsvarande 10 15 20 25 30 konvex struktur (126) hos ett tvärsnitt (C) längs med sagda första centrala axel hos grund- backen, så att den konkava strukturen permanent deformeras som resultat av ett ingrepp mellan sagda konvexa och sagda konkava strukturer, vilket resulterar från att grundbacken och överbacken först placeras i en inbördes kontakterande orientering, i vilken de första respektive andra axlarna är i linje med varandra och de respektive kontaktytorna vetter mot varandra, och därefter pressas samman till en ingreppsorientering, i vilken kontakt etable- rats mellan sagda kontaktytor.
4. Chucköverback (110) enligt krav 3, k ä n n e t e c k n a d a v att över- backen antingen är tillverkad av en stållegering som har en hårdhet av som mest 250 HB, företrädesvis mellan 100 och 250 HB, eller från en aluminiumlegering som har en hårdhet av som mest 250 HB, företrädesvis som mest 100 HB, företrädesvis mellan 50 och 100 HB.
5. Chuckback (110,120) enligt något av de föregående kraven, k ä n n e t e c k - n a d a v att både den konvexa strukturen (126) och den konkava strukturen (116) är åtminstone delvis rotationssymmetriska kring den första (A1) respektive den andra (A2) ax- eln.
6. Chuckback (110,120) enligt något av de föregående kraven, k ä n n e t e c k - n a d a v att den konvexa strukturen (126) innefattar en kant med en krökningsradie (r) av mellan 1 och 5 mm, företrädesvis mellan 2och 3 mm, företrädesvis omkring 2,5 mm.
7. Chuckback (110,120) enligt något av de föregående kraven, k ä n n e t e c k - n a d a v att den konkava strukturen (116) innefattar en yta (116a) som är snedställd i förhållande till den andra centrala axeln (A2), företrädesvis med en snedställningsvinkel (A) av mellan 15° och 40°, så att den konvexa strukturen (126) slår emot sagda yta när chuck- backarna bringas till sagda kontakterande orientering. a v att chucköver-
8. Chuckback(110,120) enligt krav 7,k ä n n e t e c k n a d backen är tillverkad från en stållegering, av att snedställningsvinkeln (a) är mellan 18° och 10 15 20 25 30 26°, företrädesvis omkring 22°, alternativt att chucköverbacken är tillverkad från en alumi- niumlegering och av att snedställningsvinkeln (A) är mellan 26° och 34°, företrädesvis om- kring 30°.
9. Chuckback (110,120) enligt något av de föregående kraven, k ä n n e t e c k - n a d a v att chuckgrundbacken innefattar en fördjupning (125) och chucköverbacken innefattar ett motsvarande utsprång (115), och av att en ma ntelyta hos sagda fördjupning är anordnad att komma i direkt kontakt med en mantelyta hos sagda utsprång när chuck- backarna är i sagda ingreppsorientering.
10. Chuckback (110,120) enligt krav 9, k ä n n e t e c k n a d a v att sagda mantelytor är rotationssymmetriska kring de respektive första (A1) och andra (A2) central- axlarna, och av att sagda mantelytorär anordnade att komma i direkt kontakt med varandra längs med deras fulla respektive vinkelutsträckning när chuckbackarna är i sagda kontakter- ande orientering.
11. Chuckback (110,120) enligt krav 9 eller 10, k ä n n e t e c k n a d a v att sagda konvexa struktur (126) består av en yttre begränsningskant hos sagda fördjupning (125).
12. Chuckback (110,120) enligt något av de föregående kraven, k ä n n e t e c k - n a d a v att chuckbackarna är anordnade så att ett visst spel, av mellan 0,05 och 0,25 mm, företrädesvis mellan 0,10 och 0,15 mm, företrädesvis omkring 0,12 mm, förefinns mel- lan chuckbackarna när dessa är anordnade i sagda kontakterande orientering.
13. Chuckkäft (100) innefattande en chuckgrundback (120) enligt något av de föregående kraven som är beroende av krav 1, såväl som en chucköverback (110) enligt något av före- gående krav som är beroende av krav 3.
14. Chuckkäft (100) enligt krav 13, k ä n n e t e c k n a d a v att chuckkäften vidare innefattar ett skruvorgan (130) anordnat att orsaka sagda presskraft som pressar chuckbackarna (110,120) mot varandra till att uppnå sagda ingreppsorientering, och av att 10 15 20 25 30 chuckkäften är anordnad så att ett skruvorganmoment av mellan 60-90 NM, företrädesvis mellan 70-75 NM, krävs för att åstadkomma sagda kontakt.
15. Chuckkäft (100) enligt krav 13 eller 14, k ä n n e t e c k n a d a v att chuck- käften är indexerad, så att sagda ingrepp mellan chuckbackarna (110,120) är anordnat så att chucköverbacken kan vridas i förhållande till chuckgrundbacken kring den andra centra- laxeln (A2) till att anta ett antal av förutbestämda rotationspositioner, och av att chuckö- verbacken är anordnad med olika greppradier (111,112) för olika av sagda rotationsposit- ioner.
16. Chuck (10) innefattande åtminstone två chuckkäftar (100) enligt något av kraven 13- 15, k ä n n e t e c k n a d a v att chucken är associerad med en tredje central axel (A3), och av att chucken vidare innefattar ett respektive radiellt verkande inställningsorgan (121) för varje respektive käft, anordnat att verka på chuckgrundbacken hos chuckkäften ifråga och att tillåta den att ställas in radiellt i förhållande till sagda tredje centralaxel.
17. Förfarande för användning av en chuck (10) enligt krav 16, k ä n n e t e c k - n a t a v att förfarande innefattar stegen a) tillhandahålla sagda åtminstone två chuckgrundbackar (120) på chucken; b) tillhandahålla sagda åtminstone två chucköverbackar (110), vars respektive konkava struktur (116) inte ännu permanent har deformerats som en konse- kvens av ett ingrepp med en chuckgrundback; c) montera sagda chucköverbackar på sagda chuckgrundbackar, och bringa de re- spektive chuckkäftarna till respektive ingrepp med deras respektive kontakty- tor (113,123) i direkt kontakt med varandra, så att sagda respektive konkava struktur permanent deformeras av motsvarande konvexa struktur (126) hos respektive chuckgrundback; d) klämma fast ett arbetsstycke (12) med hjälp av chucken; e) lösgöra arbetsstycket; f) demontera chucköverbackarna från chuckgrundbackarna; g) åter montera chucköverbackarna på samma respektive chuckgrundbackar; och 10 h) åter klämma fast samma eller ett annat arbetsstycke med hjälp av chucken.
18. Förfarande enligt krav 17,k ä n n e t e c k n a t a v att,isteg h, åtminstone en chucköverback (110) roteras kring sin respektive andra centralaxel (A2) jämfört med sin respektive position efter steg c.
19. Förfarande enligt krav 17 eller 18,k ä n n e t e c k n a t a v att stegdinne- fattar att notera positionen hos den respektive chuckkäften (100) när arbetsstycket (12) kläms fast av chucken (10), och steg h innefattar att åter bringa respektive chuckkäft att återvända till den noterade positionen.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1550472A SE1550472A1 (sv) | 2015-04-21 | 2015-04-21 | Chuck arrangement |
CN201680023389.9A CN107530789B (zh) | 2015-04-21 | 2016-03-21 | 卡盘装置 |
EP16783490.2A EP3285947B1 (en) | 2015-04-21 | 2016-03-21 | Chuck arrangement |
US15/566,450 US10293412B2 (en) | 2015-04-21 | 2016-03-21 | Chuck arrangement |
PCT/SE2016/050230 WO2016171599A1 (en) | 2015-04-21 | 2016-03-21 | Chuck arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SE1550472A SE1550472A1 (sv) | 2015-04-21 | 2015-04-21 | Chuck arrangement |
Publications (2)
Publication Number | Publication Date |
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SE538603C2 SE538603C2 (sv) | 2016-09-27 |
SE1550472A1 true SE1550472A1 (sv) | 2016-09-27 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SE1550472A SE1550472A1 (sv) | 2015-04-21 | 2015-04-21 | Chuck arrangement |
Country Status (5)
Country | Link |
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US (1) | US10293412B2 (sv) |
EP (1) | EP3285947B1 (sv) |
CN (1) | CN107530789B (sv) |
SE (1) | SE1550472A1 (sv) |
WO (1) | WO2016171599A1 (sv) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109483301A (zh) * | 2018-12-16 | 2019-03-19 | 广东星联精密机械有限公司 | 一种五轴三爪定位工装 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2950117A (en) * | 1958-03-03 | 1960-08-23 | Ivor D Walmsley | Turning lathe |
US3179430A (en) * | 1963-01-17 | 1965-04-20 | Frank P Zierden | Lathe chuck |
CH563825A5 (sv) * | 1972-11-10 | 1975-07-15 | Roehm Guenter H | |
GB2143163B (en) * | 1983-06-08 | 1987-01-21 | Pratt Int Ltd Burnerd | Workholding devices |
US4556228A (en) * | 1984-11-19 | 1985-12-03 | Lock Jaws, Inc. | Jaw locking mechanism for lathe chucks having a soft jaw, a master jaw and a key block |
US4706973A (en) * | 1986-08-08 | 1987-11-17 | David S. Covarrubias | Chuck and top jaw assemblies |
US5195760A (en) * | 1990-06-12 | 1993-03-23 | Black & Decker Inc. | Keyless chuck |
US5155898A (en) * | 1991-09-11 | 1992-10-20 | Gutierrez John P | Rotary chuck soft jaws |
JP3283061B2 (ja) * | 1992-06-19 | 2002-05-20 | 株式会社日立製作所 | 旋回スクロールの加工法 |
JPH07195210A (ja) * | 1993-12-29 | 1995-08-01 | Yukiwa Seiko Kk | チャック装置 |
US5460389A (en) * | 1994-03-29 | 1995-10-24 | Enz; Eric W. | Jaw assembly |
CN2222035Y (zh) * | 1995-02-23 | 1996-03-13 | 吕顺杰 | 可换式软爪 |
US5664793A (en) * | 1996-02-21 | 1997-09-09 | Engibarov; Eddy | Quick-change chuck jaws |
DE19919408B4 (de) * | 1998-10-24 | 2005-07-21 | Smw-Autoblok Spannsysteme Gmbh | Membranspannfutter |
US6241261B1 (en) * | 1998-10-24 | 2001-06-05 | Smw Autoblok Spannsysteme Gmbh | Chuck |
US6145850A (en) * | 1998-10-24 | 2000-11-14 | Smw Autoblok Spannsysteme Gmbh | Diaphragm chuck |
US8152175B1 (en) * | 2006-12-22 | 2012-04-10 | Maro Scott J | Jaw assembly |
CN201098742Y (zh) * | 2007-11-13 | 2008-08-13 | 洛阳轴研科技股份有限公司 | 一种可拆卸简易软爪 |
KR100978319B1 (ko) * | 2008-04-04 | 2010-08-26 | 고기택 | 선반용 자동배출식 척 |
SE1100565A1 (sv) * | 2011-07-26 | 2013-01-27 | Mpc Automation Systems Ab | Chuckrelaterat arrangemang |
KR101544908B1 (ko) * | 2014-01-23 | 2015-08-17 | 칸워크홀딩 주식회사 | 공작물 장착용 척 |
-
2015
- 2015-04-21 SE SE1550472A patent/SE1550472A1/sv unknown
-
2016
- 2016-03-21 CN CN201680023389.9A patent/CN107530789B/zh active Active
- 2016-03-21 EP EP16783490.2A patent/EP3285947B1/en active Active
- 2016-03-21 WO PCT/SE2016/050230 patent/WO2016171599A1/en active Application Filing
- 2016-03-21 US US15/566,450 patent/US10293412B2/en active Active
Also Published As
Publication number | Publication date |
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SE538603C2 (sv) | 2016-09-27 |
CN107530789A (zh) | 2018-01-02 |
US10293412B2 (en) | 2019-05-21 |
EP3285947B1 (en) | 2022-11-23 |
CN107530789B (zh) | 2020-02-28 |
EP3285947A4 (en) | 2018-04-25 |
WO2016171599A1 (en) | 2016-10-27 |
EP3285947A1 (en) | 2018-02-28 |
US20180117682A1 (en) | 2018-05-03 |
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