EP1024914A1 - Roll bending machine for forming a ring-shaped part - Google Patents
Roll bending machine for forming a ring-shaped partInfo
- Publication number
- EP1024914A1 EP1024914A1 EP98950159A EP98950159A EP1024914A1 EP 1024914 A1 EP1024914 A1 EP 1024914A1 EP 98950159 A EP98950159 A EP 98950159A EP 98950159 A EP98950159 A EP 98950159A EP 1024914 A1 EP1024914 A1 EP 1024914A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- machine according
- rolling machine
- support
- rolling
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
- B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
Definitions
- the present invention relates generally to the rolling of an annular part for the purpose of forming the latter by rolling, which, in practice, is cold rolling.
- the annular part to be formed is, for example, a ring for ball bearings, or a ball retaining cage for constant velocity transmission with balls.
- a machine comprising, on the one hand, various rotary members, namely, a forming mandrel, which is rotatably mounted around a first axis, and on which the annular part to be formed, or, more precisely a blank thereof, must be engaged with play, a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining , with the forming mandrel, a rolling envelope corresponding to the final shape sought for the cross section of this annular part, and two support rollers, which, coaxial with each other, without necessarily being carried by the same shaft, are rotatably mounted around a third axis parallel to the previous two and located in the same plane as these, and which are supported on the
- the worked annular part can be considered as constituting a finished part, that is to say a part which does not require reworking. subsequent machining, except for a any heat treatment and any necessary rectification after it.
- face control rollers is understood to mean rollers which are intended to control a form of annular part already produced.
- rollers have a completely different function from that of axial forming rollers such as those described in US Pat. No. 3,681,962, in particular in FIGS. 4 to 8 of this document.
- the forming wheel and the forming mandrel do not define between them a rolling envelope, so that the axial deformation of the material is free between these two tools.
- US-A-3,681,962 does not, moreover, provide for such axial forming rollers in its variants of machines which form the material in a rolling envelope. But, to return to the rolling machines comprising face control rollers, there then arises, in particular, the problem of the installation of these face control rollers, even though, depending on this installation, the conditions d 'intervention of these face control rollers, and therefore their efficiency, that the overall size.
- the present invention generally relates to a provision which, from this double point of view, is particularly satisfactory.
- a rolling machine for annular part to be formed of the kind comprising, on the one hand, various rotary members, namely, a forming mandrel, which is rotatably mounted about a first axis , a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining, with the forming mandrel, a rolling envelope corresponding to the final shape sought for the cross section of the part annular concerned, and two support rollers, which, rotatably mounted around a third axis parallel to the previous two and located in the same plane as these, are supported on the forming mandrel on either side of the rolling envelope, and, on the other hand, drive means specific to driving in rotation of at least one of these rotary members,
- this rolling machine being generally characterized in that , two control rollers face being further provided each to intervene respectively on the lateral faces of the annular part at a distance from the rolling envelope, these face control rollers are arranged between
- the axes of the face control rollers extend in the same plane as that, hereinafter said for the sake of convenience, rolling plane, in which the axes of the forming mandrel, of the forming wheel also extend. , and support rollers.
- the rolling machine according to the invention comprises follower rollers, which, rotatably mounted, frame the rolling envelope for the maintenance, in the rolling plane, of the axis of the annular workpiece.
- FIG. 1 is a perspective view of the initial blank of a simplified form of an annular part likely to be concerned, before the forming thereof;
- Figure 2 is an axial sectional view of this blank, along line 11-11 of Figure 1;
- Figures 3 and 4 are views, which each similar to those of Figures 1 and 2, respectively, relate to the simplified shape of the annular part concerned, after the forming thereof;
- FIG. 4A is, on a different scale, a partial view in axial section, which, corresponding in part to that of FIG.
- FIG. 4 relates to a more constructive annular part, for a first type of defect thereof in its plane seal;
- Figure 4A ' is a partial view in axial section similar to that of Figure 4A, for a second type of defect in the annular part concerned;
- FIG. 4B is a partial view in axial section similar to that of FIGS.
- Figure 5 is, with local cutaway, a perspective view in principle of the rolling machine according to the invention
- Figure 6 is, after elimination of one of the support rollers it comprises, a more constructive perspective view of this rolling machine
- Figure 7 is a different scale, a partial view in cross section along the line VII-VII of Figure 6
- Figure 8 is a larger scale, a partial view in axial section along the line VIII-VIII of Figure 6
- Figure 9 is another partial sectional view along the line IX-IX of Figure 6
- Figure 10 is, along the arrow X of Figure 6, a schematic principle view of the structure to which belong the support arms that includes this rolling machine
- Figure 1 1 is a schematic view which, similar to that of Figure 10, relates to a first embodiment
- Figure 1 2 is a schematic view which, also similar to that of Figure 10, relates to a second alternative embodiment
- Figure 1 3 is a partial elevational view of this alternative embodiment, along arrow XIII of Figure 1
- the annular part 1 0 is intended to form the outer ring of a ball bearing. It comprises, overall, along a substantially rectangular overall cross section, an external face 1 1, an internal face 1 2, and two lateral faces 1 3, with, annularly, recessed on the internal face 1 2, in the median zone thereof, a groove 14, of circular cross section.
- the lateral faces 1 3 of the annular part 1 0 are not flat, but on the contrary comprise , in clearance, two frustoconical sections which join one another along a joint plane T, FIGS. 4A, 4A '.
- FIG. 4A there may be surface irregularities by excess, FIG. 4A, in the form of burrs or other projections, or by default, FIG. 4A ', in the form of cracks or other depressions.
- the invention proposes, by a face check, the elimination of these surface irregularities.
- the initial blank 10 ' is, for example, and as shown, a simple section of tube, the internal face 1 2' is smooth.
- the rolling used for this purpose is done, in practice, according to methods described in more detail later, on a rolling machine 1 5, and it is necessarily accompanied by an increase in the diameter of the annular part 1 0 worked.
- the rolling machine 1 5 according to the invention will not be described in all its details here. In particular, there will be no mention here of its frame, it being the responsibility of the skilled person.
- the rolling machine 1 5 generally comprises, on the one hand, various rotary members 1 6 , 1 8, 20, namely, a forming mandrel 1 6, which is rotatably mounted around a first axis A 1 f and on which the annular part 10 to be formed, or, more precisely, the blank 1 0 ' of it, must be engaged with play, a forming wheel1 8, which is rotatably mounted around a second axis A 2 parallel to the first, and which is capable of defining, with the forming mandrel 1 6, an envelope of rolling 1 9, corresponding to the final shape sought for the cross section of this annular part 10, and two support rollers 20, which, rotatably mounted around a third axis A 3 parallel to the previous two and located in the same plane P that these, here said for the sake of convenience, rolling plane, rest on the mandrel d e forming 1 6 on either
- the forming mandrel 1 6 comprises, on the one hand, a median section 21, which is of reduced cross section, and on which protrudes annularly a duly profiled rib 22 for forming the groove 14, and, d on the other hand, two lateral sections 23, which are of larger cross section and on which the support rollers 20 bear.
- the forming wheel 1 8 itself comprises a median section 24, which is of reduced cross section, and two lateral sections 25, which are of larger cross section, to contain the axial creep of the annular part 10.
- the rolling machine 1 5 also comprises, on either side of the forming mandrel 1 6, two follower rollers 26, which, rotatably mounted about axes A 5 , surround the rolling envelope 1 9.
- These follower rollers 26 operate on the external face 1 1 of the annular part 1 0, to control the roundness and the symmetry and to take up possible deformations, and it follows that, during forming, the axis A 4 of this annular part 1 0 remains in the rolling plane P of the axes A-,,, A 2 ,
- These axes A 5 are substantially parallel to the axes A-,, A 2 , A 3 above , but one of them, at least, can however be advantageously slightly inclined with respect to these, to compensate for possible defects of external taper.
- the follower rollers 26 are arranged in a perfectly symmetrical manner with respect to the rolling plane P, while being for this purpose duly maintained by support means, known in themselves and not shown. They thus make it possible to maintain in the rolling plane P the axis A 4 of the annular part 1 0.
- the drive means E which have only been shown diagrammatically in broken lines in FIG. 5, are also of known type.
- the drive means E are applied to the forming wheel 18 and to the support rollers 20.
- the rolling machine 1 5 finally comprises a feeler 27 for checking the diameter of the annular part 10. This feeler 27 intervenes between the support rollers 20.
- two face control rollers 29 being further provided each to intervene respectively on the side faces 1 3 of the annular part 1 0 at a distance from the rolling envelope 1 9, as shown diagrammatically in the figure 5, these face control rollers 29 are arranged between the support rollers 20, in the overall volume enveloping the outer contour thereof.
- the axes A 6 of the face control rollers 29 extend in the same plane as that in which the axes A ⁇ of the forming mandrel 1 also extend. 6, A 2 of the forming wheel 1 8, and A 3 of the support rollers 20, that is to say in the rolling plane P.
- the face control rollers 29 are cylindrical, and, at least at the end of work, their axes A 6 are parallel to each other.
- their diameter d is less than their length I.
- this diameter d is less than at least half of the length I. In the embodiment shown in Figures 1 to 1 0, it is substantially equal to one third of this length I.
- the diameter d of the face control rollers 29 is preferably chosen to be as small as possible so that these face control rollers 29 are as penetrating as possible under low effort.
- the face control rollers 29 are each respectively at least partially arranged inside the support rollers 20, each of these support rollers 20 comprising , recessed, on its internal face 30, and recessed with respect to its periphery 31, a recess 32 in which the corresponding face control roller 29 is at least partially engaged.
- the support rollers 20 can rest on the forming mandrel 1 6 as close as possible to the rolling envelope 1 9, which allows effective support of this forming mandrel 1 6 by these supporting rollers 20 and therefore limits its bending.
- the recess 32 which each of the support rollers 20 thus comprises extends circularly all around its axis A 3 .
- Each of the support rollers 20 thus comprises a flange 20a, which, at its periphery 31, has annularly, projecting towards the other, a flange 20b, and which, in its central zone, has, axially, projecting in the opposite direction to the previous one, a thick part 20c forming a hub.
- the face control rollers 29 are free to rotate.
- each of these face control rollers 29 is rotatably mounted on a support arm 34 mounted pivoting about a main pivot axis A 7 orthogonal to the axis A 3 of the support rollers 20.
- each of the support arms 34 which thus comprises the rolling machine 1 5 according to the invention extends generally diametrically relative to the support rollers 20 and has a central recess 35, of circular outline, for the passage, in particular, of the support shaft 36 of these support rollers 20.
- This support shaft 36 has been shown diagrammatically in broken lines in FIG. 8.
- the main pivot axis A 7 of each of the support arms 34 intersects the axis A 3 of the support rollers 20, as shown diagrammatically in broken lines in FIG. 7.
- the two support arms 34 which are of similar configuration, are each in the form of a flange, with an annular median part 37, around their central recess 35, and, in diametrically opposite positions, one by relative to each other, two radial extensions
- the support arms 34 are connected to each other, in an articulated manner, by at least one flange 39, here called for simple convenience central flange.
- the main pivot axis A 7 of each of the support arms 34 is materialized by two pins 40, which are directed, radially, towards the axis A 3 of the support rollers 20, and which, directly or indirectly, bear radially in diametrically opposite positions with respect to each other, on a sleeve 41 centered on the axis A 3 of the support rollers 20.
- this sleeve 41 is in two parts, namely, an internal part 41 A, which, engaged on the support shaft
- the pins 40 bear on the sleeve 41 by means of bearings 43, FIG. 7, and, for the support of these, the external part 41 B of this sleeve 41 has, in positions diametrically opposite to each other, two flats 44.
- FIGS. 1 to 1 0 relate to the case where the face control to be carried out must take place in a symmetrical and balanced manner on both of the side faces 1 3 of the annular part 10 , none of these lateral faces 1 3 can be taken as the reference face for the assembly.
- the support arms 34 constitute, with the central flanges 39 which connect them, a structure in the form of a clamp, and, at their end opposite to the face control rollers 29, they are jointly subjected to a device for spacing 45.
- this spacing device 45 intervenes between the support arms 34, and, more precisely, between the corresponding radial extensions 38 thereof. In the embodiment shown, this spacer device
- a wedge 46 which, under the control of a control device 47, and as shown diagrammatically by the double arrow F-, in FIG. 7, is mounted movable in a plane perpendicular to the axis A 3 support rollers 20, and therefore perpendicular to the rolling plane P, preferably micrometrically.
- the two support arms 34 are also jointly coupled to an anchoring device 52 capable of blocking them in rotation relative to the axis A 3 of the rollers of support 20, FIG. 7.
- each of the face control rollers 29 is directly rotatably mounted on its support arm 34.
- each of the face control rollers 29 extends in a recess 53 of its support arm 34 which passes right through it.
- this recess 53 affects, in the manner of a slot, the corresponding radial extension 38 of this support arm 34, and, at the end of this radial extension 38, it is closed by a flange of centering 55.
- the shaft 56 of such a face control roller 29 can be advantageously supported at one and the other of its ends, as shown diagrammatically in broken lines in FIG. 7, and as shown in solid lines in FIG. 8.
- stop means are moreover provided for ensuring a rotation stop of the support arms 34 of the face control rollers 29 relative to their axis A 3 , and thus allowing the axes A 6 to be maintained. face control rollers 29 in the rolling plane P.
- the face control rollers 29 are only actuated in a timely manner during forming, depending on the diameter of the annular part 1 0 to be worked.
- the wedge 46 is then pressed between the extensions 38 of the support arms 34 opposite the face control rollers 29.
- this inclination can also be compensated for by using conical face control rollers 29, as shown diagrammatically in FIG. 11.
- conical face control rollers 29 As shown diagrammatically in FIG. 11.
- the taper of these face control rollers 29 has been deliberately exaggerated, to make it visible and to facilitate understanding.
- the central flanges 39 connecting to one another the two support arms 34 advantageously serve to resume at this level the radial rolling reactions and thus advantageously relieve the rolling means 42 internal to the sleeve 41 .
- the face control provided according to the invention does not in practice cause any appreciable creep of material.
- FIGS. 1 2 to 14 relate to the case where, the face check to be carried out having to take place asymmetrically on the lateral faces 1 3 of the annular part 10, it is possible to choose one of these lateral faces 1 3 as a reference face for the assembly.
- the support arms 34 are connected to each other, at a distance from their main pivot axis A 7 , and in an articulated manner, each along an axis.
- secondary pivot A ' 7 parallel to the main pivot axis A 7 above , by at least one flange 57, hereinafter called for simple convenience end flange, which is parallel to the central flanges 39, and which is likewise length than these.
- end flange 57 is provided.
- the support arms 34 then constitute, with the flanges 39 and 57 which connect them, a structure in the form of a deformable parallelogram, and, as shown diagrammatically by a double arrow F 4 in the figure. 1 2, the assembly is subjected to a control device 58 capable of allowing its position control with respect to the annular part 1 0 to be worked, by rotation about the pivot axes A 7 , A ' 7 , which, one of the support arms 34 being for example taken as a reference, makes it possible to work preferentially one of the lateral faces 1 3 of this annular part 10 rather than the other of these.
- each of the face control rollers 29 is rotatably mounted on its support arm 34 by means of a roller support 59 pivotally mounted on this support arm 34 around a tilting axis A 8 , which, parallel to that A 6 of this face control roller 29, extends at a distance therefrom.
- roller support 59 is subjected to two jacks 60, 61, which each extend respectively on either side of its pivot axis A 8 , and which bear on the arm support 34.
- these jacks 60, 61 are integrated into this support arm 34.
- the relative approximation of the face control rollers 29 can be ensured by acting accordingly on the control device 58 and / or on the jacks 60, 61.
- the surface rolling of the lateral faces of the latter can be done at an angle to this axis, whatever the nature, cylindrical or conical , face control rollers used.
- these face control rollers may possibly have a scalable outer surface if desired.
- this ring which has a groove
- the forming wheel and the forming mandrel in turn have inverted conjugate shapes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9713224A FR2769859B1 (en) | 1997-10-22 | 1997-10-22 | ROLLING MACHINE FOR ANNULAR PART TO BE FORMED |
FR9713224 | 1997-10-22 | ||
PCT/FR1998/002241 WO1999020415A1 (en) | 1997-10-22 | 1998-10-20 | Roll bending machine for forming a ring-shaped part |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1024914A1 true EP1024914A1 (en) | 2000-08-09 |
EP1024914B1 EP1024914B1 (en) | 2002-05-02 |
Family
ID=9512507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98950159A Expired - Lifetime EP1024914B1 (en) | 1997-10-22 | 1998-10-20 | Roll bending machine for forming a ring-shaped part |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1024914B1 (en) |
DE (1) | DE69805200T2 (en) |
ES (1) | ES2173631T3 (en) |
FR (1) | FR2769859B1 (en) |
WO (1) | WO1999020415A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001121416A (en) * | 1999-10-27 | 2001-05-08 | Minebea Co Ltd | Method of finishing land of outer race of bearing, and bearing |
CN101829745B (en) * | 2010-04-23 | 2012-01-11 | 武汉理工大学 | Cold ring rolling forming method for double-flute section ring |
CN104416099A (en) * | 2013-09-04 | 2015-03-18 | 张家港市华尔东环形锻件有限公司 | Special-shaped core roller for ring rolling mill |
CN108856608B (en) * | 2018-06-05 | 2019-09-20 | 北京中科三维科技有限公司 | High precision numerical control closed loop rolling and forming system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3681962A (en) * | 1969-12-01 | 1972-08-08 | Rotary Profile Anstalt | Apparatus for rolling rings |
US4173134A (en) * | 1978-02-24 | 1979-11-06 | General Electric Company | Apparatus and method for guiding a ring structure during the manufacture thereof |
US4869088A (en) * | 1988-07-05 | 1989-09-26 | Kazuo Kadotani | Ring shaping apparatus |
DE4405373C2 (en) * | 1994-02-19 | 1997-12-04 | Bad Dueben Profilwalzmaschinen | Device for the round rolling of rings |
-
1997
- 1997-10-22 FR FR9713224A patent/FR2769859B1/en not_active Expired - Fee Related
-
1998
- 1998-10-20 EP EP98950159A patent/EP1024914B1/en not_active Expired - Lifetime
- 1998-10-20 ES ES98950159T patent/ES2173631T3/en not_active Expired - Lifetime
- 1998-10-20 WO PCT/FR1998/002241 patent/WO1999020415A1/en active IP Right Grant
- 1998-10-20 DE DE69805200T patent/DE69805200T2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9920415A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2769859A1 (en) | 1999-04-23 |
DE69805200D1 (en) | 2002-06-06 |
EP1024914B1 (en) | 2002-05-02 |
WO1999020415A1 (en) | 1999-04-29 |
FR2769859B1 (en) | 2000-01-28 |
DE69805200T2 (en) | 2002-10-24 |
ES2173631T3 (en) | 2002-10-16 |
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