EP0634234A1 - Vorrichtung zum Nuten von Rohren - Google Patents

Vorrichtung zum Nuten von Rohren Download PDF

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Publication number
EP0634234A1
EP0634234A1 EP94420202A EP94420202A EP0634234A1 EP 0634234 A1 EP0634234 A1 EP 0634234A1 EP 94420202 A EP94420202 A EP 94420202A EP 94420202 A EP94420202 A EP 94420202A EP 0634234 A1 EP0634234 A1 EP 0634234A1
Authority
EP
European Patent Office
Prior art keywords
balls
cage
tube
grooving
arc
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
Application number
EP94420202A
Other languages
English (en)
French (fr)
Other versions
EP0634234B1 (de
Inventor
Jean-Louis Sauvonnet
Franck Delavaquerie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trefimetaux SAS
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Trefimetaux SAS
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Filing date
Publication date
Application filed by Trefimetaux SAS filed Critical Trefimetaux SAS
Publication of EP0634234A1 publication Critical patent/EP0634234A1/de
Application granted granted Critical
Publication of EP0634234B1 publication Critical patent/EP0634234B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same

Definitions

  • the invention relates to the field of grooved tubes most often used as elements of heat exchangers in air conditioners.
  • the invention relates more particularly to devices for grooving the inner surface of tubes.
  • the subject of the invention is a device which solves the problems set out above, and which also allows high productivity, using a device which is economical in itself (investment) and has a long service life.
  • the Applicant has observed a radical change, on all the points raised in connection with the problems encountered with the prior art, from the moment when it simultaneously implemented the two essential means of invention, namely, on the one hand a cage whose active part (during grooving) has a particular internal profile specific to the invention, and on the other hand, lubrication of all the parts inside said cage .
  • the internal profile partly “conforms" to the curvature of the balls, which is entirely different from the prior art, where there are essentially "one-off" contacts of the ball / type. plan.
  • FIG. 1 represents a grooving device (1) of a tube (2) to be grooved according to the prior art (FIG. 2 of US Pat. No. 4,373,366 with references modified so that they are homogeneous with those of the this request).
  • FIGs 2a and 2b show, in axial section, a rotary cage (8) according to the invention.
  • the cage (8) is shown with the holding die (4) and the grooving mandrel (6).
  • Figure 2b shows an enlargement of the cage and balls of Figure 2a. These figures show neither the shaft (20) ensuring the rotation of the cage (8), nor, downstream, the finishing die (10), any more than the means allowing the lubrication of the interior. of the rotating cage (8).
  • FIG. 3 shows, in axial section, a complete grooving block (7) according to the invention, as well as the holding die (4) provided with means (23) for introducing a lubricant (25) upstream and in downstream of the support system.
  • Fixed parts the electromagnetic pin (19), the device (22) for lubricating the inside of the cage (8) which comprises a tube (21) coaxially supplying lubricant (25) to the downstream base (18) of said balls ( 9), as well as a casing (27) making it possible to recover the lubricant (25R) to be evacuated or recycled.
  • Rotating parts the shaft (20) which carries at its upstream end the rotary cage (8) fitted with a closing flange (12) which is mounted axially on the support part (11).
  • the flange (12) is perforated in places to allow the radial evacuation of the lubricant (25) circulating in the cage (8), under the action of centrifugal force.
  • FIGS. 4a to 4c represent, in axial half-section, three examples according to the invention of internal profile (26) of support parts (11):
  • the profile (26) consists of an arc of circle (13) tangentially connecting at a "high" point (15h) to a line segment 14h.
  • the angle alpha is 90 °
  • the angle beta angle of the bisector of the angle alpha relative to the oriented axis (3) is 135 °.
  • the profile (26) consists of an arc (13) tangentially connecting at a "high" point (15h) to a straight line (14h) and at a "low” point (15b ) to a line segment (14b).
  • the alpha angle is 70 ° and the beta angle is 125 °.
  • the gamma angle (angular coordinate of one end of said circular arc) is 160 ° and the gamma 'angle (angular coordinate of the other end of said circular arc) is 90 °.
  • the profile (26) consists only of an arc (13) of angle alpha equal to 90 °.
  • the support part (11) is provided with studs making it possible to reversibly fix the closing flange (12).
  • Figure 5 shows in section perpendicular to the axis (3) the interior of the grooving cage in the case of 6 balls (shown tangent to each other for convenience of construction).
  • said arc of circle (13) and said balls have neighboring radii of curvature.
  • neighbor is meant that the radius of curvature of the balls is less, by 5% at most, than that of said arc of a circle.
  • said interior profile (26) is preferable for said interior profile (26) to include minus a tangential connection of one end of said arc of a circle (13) and of a straight line segment (14h and / or 14b).
  • said interior profile (26) comprises a tangential connection called “top” (15h) of said circular arc (13) and of a straight line (14h) parallel to said axis (3), as shown in FIGS. 4a and 4b, so as to impose on said balls (9) a predetermined axial spacing, and in a way form a cage with a cylindrical wall, which is convenient for mounting and dismounting the cage, which ensures mechanical stability of the part even at very high rotational speed, and this contributes to ensuring the production of grooved tubes with stable geometric characteristics.
  • Said internal profile (26) may comprise a tangential connection called "bottom” (15b) of said arc of circle (13) and of a straight line segment (14b) making with said axis (3) an angle between 45 and 90 ° , and preferably between 70 and 90 °.
  • Such a connection creates a wedge-shaped space at the downstream base of the balls, which can facilitate the flow of the lubricant (25), brought by the tube (21) to the downstream base (18) of balls, between the balls ( 9) and the inner surface of said support part (11).
  • said circular arc (13) has an extent (angle alpha) of between 40 and 90 °, the angle of its bisectice with said axis (angle beta) being chosen so as to correspond substantially to the result of the forces of said balls against said bearing part (11), for a given running speed of said tube (2) and a given speed of rotation of said rotary cage (8).
  • angle alpha the angle of its bisectice with said axis
  • angle beta being chosen so as to correspond substantially to the result of the forces of said balls against said bearing part (11), for a given running speed of said tube (2) and a given speed of rotation of said rotary cage (8).
  • the balls have a degree of freedom in the axial direction, this is the reason why said closing flange (12), integral with said bearing part (11), leaves the balls (9) an axial clearance, typically a few mm.
  • the results are less good (faster wear) if the profile of the interior of the cage mechanically limits the degrees of freedom of the balls, as in the case of a ball bearing cage.
  • the second essential means of the invention relates to the lubrication of the balls and of the interior of said support part (11).
  • said means for lubricating the surfaces in contact allow, permanently, lubrication of the downstream base (18) of the balls so that lubricant constantly comes to come between balls and the internal surface of said bearing part (11), between balls and the grooving tube and between the balls between them.
  • Said grooving block comprises a fixed rotary spindle (19), electromagnetic or mechanical, actuating in rotation a shaft (20) integral with said cage (8), located at the upstream end of said shaft (20) (relative to the direction of scrolling of said tube).
  • Said lubricant supply of the downstream base (18) of said balls is obtained according to the invention using a lubrication device (22) of said cage (8) comprising a coaxial fixed tube (21) with a diameter between the outside diameter of said tube after grooving (2R) and the internal diameter of said shaft (20), tube supplied with lubricant at its downstream end and the upstream end of which is located at a short distance (typically a few mm) from the downstream base (18) of said balls ( 9). See figure (3).
  • the tube is supplied with lubricant at room temperature (but it could possibly be refrigerated), at a rate which varies according to the grooving conditions (speed of rotation of the cage and speed of travel of the tube), but in general at a rate which also allows the lubricant to act as a cooling agent for the balls and the cage.
  • said lubrication means also comprise a supply of lubricant to the upstream base (17) of said balls (9).
  • said supply of lubricant to the upstream base (17) of said balls is obtained using a lubrication device (23) of said holding die (4), upstream and downstream of that -this, so that the tube (2) penetrates, with a lubricated outer surface, into the grooving block.
  • said closing flange (12) of said cage (8) is chosen so that said balls cannot leave, in upstream axial direction, said bearing part (11), so that said flange (12) is easy to assemble with said support part or to separate from the latter, and to facilitate the circulation of lubricant in said cage. This is the reason why said flange has perforated or grooved parts, as can be deduced from FIG. 3.
  • the closing flange (12) allows a certain axial play to the balls.
  • the balls remain in said cage (8), even in the absence of a tube, even in the absence flange, which is of great practical convenience since the inspection or the change of the balls, the change of said rotary cage are very simple and take only a few minutes.
  • the materials of the balls and of the cage - in particular of the support part (11) - are not specific to the invention. These are generally hard materials, based on steel, but any material of low strain under stress, an alloy material other than an iron alloy, or ceramic could also be suitable.
  • the device according to the invention is suitable for grooving tubes whose diameter De can typically range from 3 mm to 30 mm or more.
  • Figures 2 to 5 describe modalities of devices according to the invention.
  • the tube had an outside diameter of 10.60 mm just upstream of the grooving block, and a diameter of 9.60 mm just downstream of the grooving block.
  • the running speed was also compared according to the various devices and it was observed that, in the case of the device in test 11, very high running speeds could be achieved, typically greater than 70 m / min and at least 30 % greater than that allowed by the device in test 22 or test 21.
  • the device according to the invention constitutes the ideal solution to all of the problems encountered by a person skilled in the art in grooving tubes with the devices of the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Rolling Contact Bearings (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP94420202A 1993-07-16 1994-07-12 Vorrichtung zum Nuten von Rohren Expired - Lifetime EP0634234B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308985 1993-07-16
FR9308985A FR2707534B1 (fr) 1993-07-16 1993-07-16 Dispositifs de rainurage de tubes.

Publications (2)

Publication Number Publication Date
EP0634234A1 true EP0634234A1 (de) 1995-01-18
EP0634234B1 EP0634234B1 (de) 1997-03-26

Family

ID=9449479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420202A Expired - Lifetime EP0634234B1 (de) 1993-07-16 1994-07-12 Vorrichtung zum Nuten von Rohren

Country Status (10)

Country Link
US (1) US5526663A (de)
EP (1) EP0634234B1 (de)
JP (1) JPH0751753A (de)
KR (1) KR100290054B1 (de)
CN (1) CN1053401C (de)
DE (1) DE69402260T2 (de)
ES (1) ES2098889T3 (de)
FI (1) FI113751B (de)
FR (1) FR2707534B1 (de)
MY (1) MY110648A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795363A2 (de) * 1996-03-15 1997-09-17 Outokumpu Copper Products Oy Werkzeug zum Nuten von Rohren

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1047114C (zh) * 1995-10-26 1999-12-08 赵天涵 凸槽滚花管加工方法及装置
JP3302244B2 (ja) * 1996-01-19 2002-07-15 株式会社神戸製鋼所 内面溝付管の加工装置
US5881592A (en) * 1998-04-22 1999-03-16 Cerro Copper Products Co. Floating plug for drawing of tubes
JP4550226B2 (ja) * 2000-06-06 2010-09-22 古河電気工業株式会社 内面溝付管の製造装置
US6883597B2 (en) 2001-04-17 2005-04-26 Wolverine Tube, Inc. Heat transfer tube with grooved inner surface
US7861571B1 (en) 2008-11-10 2011-01-04 Vincent Giaimo Trapped ball draw process for reducing the diameter of tubing
CN102172724A (zh) * 2011-01-30 2011-09-07 赵英培 夹套筒体缩口机
CN104107840A (zh) * 2014-07-10 2014-10-22 苏州鸿大金属制品有限公司 带有导槽的伞柄铜管拉模
JP6169538B2 (ja) 2014-07-18 2017-07-26 三菱アルミニウム株式会社 内面螺旋溝付管の製造方法および製造装置
CN108515096B (zh) * 2018-03-25 2019-06-07 海安县盛泰冷拉型钢有限公司 一种圆钢管冷拔工装
RU2759144C1 (ru) * 2020-12-10 2021-11-09 Акционерное общество "Научно-производственное объединение "СПЛАВ" им. А.Н. Ганичева Способ изготовления осесимметричных оболочек с внутренними рифлями
CN113245097B (zh) * 2021-05-07 2024-05-10 广东旭业光电科技股份有限公司 一种光学镜头生产用高效镀膜装置及其方法
CN115318857A (zh) * 2022-10-12 2022-11-11 南通炜冠机械模具有限公司 一种异形金属高精度冷拔设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK24349C (da) * 1919-04-07 Louis Herman Brinkman Maskine til varm Trækning af Metal.
JPS55103215A (en) * 1979-02-01 1980-08-07 Hitachi Cable Ltd Working method of metal tube having groove in inside surface
JPS56117827A (en) * 1980-02-19 1981-09-16 Hitachi Cable Ltd Working device for internally grooved metallic pipe
US4712407A (en) * 1985-03-30 1987-12-15 Mitsubishi Kinzoku Kabushiki Kaisha Apparatus for working surface of metal pipe
US4876869A (en) * 1987-07-07 1989-10-31 Kabushiki Kaisha Kobe Seiko Sho Inner grooving process for a metallic tube

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736016A (ja) * 1980-08-09 1982-02-26 Hitachi Cable Ltd Naimennijumizotsukikannoseizohohooyobisonosochi
US4512178A (en) * 1983-03-28 1985-04-23 Combustion Engineering, Inc. Tube end deforming tool
JPS60187425A (ja) * 1984-12-28 1985-09-24 Hitachi Cable Ltd 内面溝付金属管の加工装置
JPH0211211A (ja) * 1988-06-28 1990-01-16 Sumitomo Light Metal Ind Ltd 内面溝付管加工装置
JPH02160110A (ja) * 1988-12-09 1990-06-20 Hitachi Cable Ltd 内面溝付管の製造方法
JPH0371914A (ja) * 1989-08-09 1991-03-27 Hitachi Cable Ltd 内面溝付金属管の加工方法およびその装置
JP2712854B2 (ja) * 1991-03-06 1998-02-16 三菱マテリアル株式会社 金属管内外面加工装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK24349C (da) * 1919-04-07 Louis Herman Brinkman Maskine til varm Trækning af Metal.
JPS55103215A (en) * 1979-02-01 1980-08-07 Hitachi Cable Ltd Working method of metal tube having groove in inside surface
JPS56117827A (en) * 1980-02-19 1981-09-16 Hitachi Cable Ltd Working device for internally grooved metallic pipe
US4373366A (en) * 1980-02-19 1983-02-15 Hitachi Cable, Ltd. Machine for forming spiral grooves in metal pipe inner surface
US4712407A (en) * 1985-03-30 1987-12-15 Mitsubishi Kinzoku Kabushiki Kaisha Apparatus for working surface of metal pipe
US4876869A (en) * 1987-07-07 1989-10-31 Kabushiki Kaisha Kobe Seiko Sho Inner grooving process for a metallic tube

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 150 (M - 037) 1980 *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 199 (M - 102) 1981 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795363A2 (de) * 1996-03-15 1997-09-17 Outokumpu Copper Products Oy Werkzeug zum Nuten von Rohren
EP0795363A3 (de) * 1996-03-15 1998-08-26 Outokumpu Copper Products Oy Werkzeug zum Nuten von Rohren

Also Published As

Publication number Publication date
ES2098889T3 (es) 1997-05-01
FI943385A (fi) 1995-01-17
FI113751B (fi) 2004-06-15
FR2707534A1 (fr) 1995-01-20
KR100290054B1 (ko) 2001-05-15
DE69402260D1 (de) 1997-04-30
MY110648A (en) 1998-09-30
KR960013505A (ko) 1996-05-22
DE69402260T2 (de) 1997-08-07
FR2707534B1 (fr) 1995-09-15
US5526663A (en) 1996-06-18
JPH0751753A (ja) 1995-02-28
FI943385A0 (fi) 1994-07-15
CN1100348A (zh) 1995-03-22
EP0634234B1 (de) 1997-03-26
CN1053401C (zh) 2000-06-14

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