EP0046934B1 - Machine de finition de pots magnétiques en ferrite - Google Patents

Machine de finition de pots magnétiques en ferrite Download PDF

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Publication number
EP0046934B1
EP0046934B1 EP81106477A EP81106477A EP0046934B1 EP 0046934 B1 EP0046934 B1 EP 0046934B1 EP 81106477 A EP81106477 A EP 81106477A EP 81106477 A EP81106477 A EP 81106477A EP 0046934 B1 EP0046934 B1 EP 0046934B1
Authority
EP
European Patent Office
Prior art keywords
machine
finishing
cores
ferrite pot
pots
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
Application number
EP81106477A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0046934A1 (fr
Inventor
Alexis Nepomiastchy
Guy René Francis Pireyre
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of EP0046934A1 publication Critical patent/EP0046934A1/fr
Application granted granted Critical
Publication of EP0046934B1 publication Critical patent/EP0046934B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0069—Other grinding machines or devices with means for feeding the work-pieces to the grinding tool, e.g. turntables, transfer means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings

Definitions

  • the invention relates to the finishing of ferrite magnetic pots, which are used to constitute inductors used in large series in telecommunications equipment.
  • Such inductors consist of at least one coil which is placed in a magnetic pot made up of half-pots assembled by their open face and having a central part intended to be machined to create a gap given to the assembly of the pot, according to the desired inductance value.
  • this value can also be adjusted by giving the central part of the half-pot an annular shape for receiving a screw-on magnetic plunger core intended to penetrate more or less into the air gap.
  • the subject of the present invention is an improved machine for finishing ferrite magnetic pots by tangential grinding, more particularly designed with a view to making it relatively simple to easily pass from the execution of one series of magnetic pots to another, in the usual or standardized dimensions required, and to allow rapid adjustment on a few pots, as well as visual monitoring of any machining incident making it possible to minimize the consequences.
  • the machine according to the invention for finishing magnetic half-pots which have, on the open side, lateral edges for assembly between half-pots and a central part intended to be machined, to create a given air gap when assembling the pot, by means of a grinding wheel projecting from a reference plane for supporting the lateral edges of the half-pots, the latter being subjected to drive means in movement in front of the grinding wheel and pressurizing on this reference plane, is characterized in that said pressurizing means comprise an elastic support roller cooperating directly with the bottom of each half-pot to form a grinding abutment.
  • said drive means are constituted by means of aperture members adapted to the shape of the half-pots and of lamellar form to move freely between said roller and the grinding wheel, these members being mounted on the extended axes d 'an endless drive chain extending parallel to the direction of travel and the reference plane, so that in the event of a change of series of pots these members are easily interchangeable. They also lend themselves to simple feeding by stacking chute under which they pass.
  • Such a machine can also advantageously be produced in a light manner, by constituting the reference plane using a table subjected to prestressing means under a force greater than the bearing force of the half-pots exerted by the stone.
  • Figures 1 to 4 are given for the sole purpose of illustrating two types of magnetic half-pots for the finishing of which the machine according to the invention finds, in a non-restrictive manner, its application.
  • the half-pot 1 of FIGS. 1 and 3 has two lateral openings 2 and a cylindrical central part 3, the end face 4 of which is flush with the plane of the lateral edges 5 of the half-pot.
  • the half-pot 6 of FIGS. 2 and 4 has two lateral openings 7 and a central part of annular section 8 intended to receive a screwable magnetic core, the end face 9 of this central part flush with the plane of the lateral edges 10 of the half -pot.
  • Two such half-pots are intended for be assembled along their lateral edges after provision of at least one winding around their central part.
  • An inductor thus formed can take various values depending on the air gap that the machine according to the invention aims to establish between the central parts of the half-pots, that is to say by machining at least one of the aforementioned end faces for each pot, which must generally be done with an accuracy of the order of a micron or a fraction of a micron. It is understood that this machining can be carried out by a tangential grinding wheel attack in the axis of the lateral openings, and preferably in two successive phases, one of roughing, the other of actual finishing.
  • the machine designed for this purpose and shown in Figures 5 to 9, comprises a sole 11 on which is fixed a base plate 12, on which are installed, by means of two base sockets 13, two columns 14 of support d 'A support 15 on which is fixed the work table 1 6 of the machine, here composed of two shelves 17a, 17b separated by an intermediate shelf 17c.
  • the support 15 is supported adjustable in height on each column by means of a bushing 18 with a lower flange cooperating with a nut 19 screwed onto a corresponding threaded part of the column and lockable by a lock nut 20.
  • the tablet 17a corresponds to the rough grinding station, the grinding wheel 21 of which passes through the support 15 in an opening 22 and the tablet in an opening 23 so as to be adjustably flush above the plane of the table.
  • the tablet 17b corresponds to the finishing grinding station whose grinding wheel 24 passes through the support 15 in an opening 25 and the tablet in an opening 26 so as to be flush in an adjustable manner above the plane of the table.
  • Each grinding wheel is mounted between a stepped axis 27 and a tightening washer 28 subjected to a locknut 29 screwable on said axis.
  • the axis 27 is integral with a spindle 30 whose body 31 is immobilized by means of a flange 32 in a half-housing 33 formed for it in a support block 34, which is mounted adjustable in height to adjust the height position of the grinding wheel for the desired machining.
  • This height-adjustable mounting is carried out by means of a wedge 35 interposed, under the block 34, between an intermediate pad 36 and a guide 37 forming a complementary corner of the wedge and resting on the base plate 12.
  • the assembly is kept fixed on the base plate 12 by means of springs 38a maintained in pressure by lateral bolts 38 whose rods pass through the block 34, the shoe 36 and the guide 37 in corresponding orifices, while they pass through the wedge 35 in buttonholes 39 allowing its adjustment movement.
  • the latter is provided by means of an adjustment screw 40 cooperating with a threaded orifice 41 of the wedge and which is rotatably mounted in a housing of a front plate 42, fixed on the front edge of the base plate 12 , the screw being held axially relative to the front plate 42 between a shoulder 43 which it has and a rotary actuating button 44.
  • the pins 30 of the two grinding wheels are driven by means of a common belt 45 engaged on a driving pulley 46 wedged on the output shaft of an electric motor 47, and on the pulley 48 of a tensioning system comprising a support arm 49 of the pulley 48, mounted articulated at 50 on the rear edge of the base plate 12, and connected to articulation at 51 in the end yoke of an adjustment rod 52, the free threaded end of which cooperates with a knurled adjusting nut 53 bearing on a plate 54 attached to the plate 12.
  • a pressure roller 55 made of elastomer, for example polyurethane.
  • This roller 55 is removably mounted on a shouldered support 56 and retained, under a washer, using a nut 57 screwable on the support.
  • the support 56 is fixed on a sleeve 58 mounted on bearings on a stepped axis 59 where it is retained by an end nut 60.
  • This axis 59 is mounted movable in height in the spaced slides 60 of a guide 61 fixed on the support 15.
  • a slide 62 which the axis 59 crosses without play and which has a vertical threaded orifice in which is engaged a height adjustment screw 63, immobilized axially at the top of the guide 61 between a shoulder which it carries and a control button 64 of said height adjustment.
  • the axis 59 roller carrier after adjustment, can be immobilized by tightening on the guide 15 of its shoulder part 65 on the one hand and a washer tightened using a nut, locknut 66 screw assembly on the other end of the axle.
  • the guides 61 are mounted on the support 15 5 with a faculty of displacement parallel to the grinding wheel plane, by means of screws 67 engaged in buttonholes 68 of the fixing bases of these guides.
  • the magnetic half-pots to be machined are moved on the work table in alignment with the two grinding stations by drive means comprising an endless chain 69 extending parallel to the plane of the table 16 and along it, and whose links mesh with a motor pinion 70 and a idler pinion 71 which are mounted on a support plate 72 bordering the table and which is fixed by screws on two consoles 72, themselves fixed by screw laterally to the support 15 of the table.
  • the motor pinion 70 is clamped between two money washers tion 74, at the upper part of a stepped axis 75 provided with a clamping nut 76, and the lower part of which turns in a bushing 77 for mounting the support plate 72, carries a drive pinion 78 meshing with the output pinion 79 of an electric geared motor 80.
  • the idler sprocket 17 has its axis 81 mounted in a sleeve which can slide in a buttonhole 92 of the support plate 72 so as to allow adjustment of chain tension using an eccentric 83 cooperating with the sleeve 82 and lockable by tightening the nut on the support plate 72.
  • one in two of the axes of the chain links is extended above the plane of the links, and on each pair of adjacent axes 84 is mounted a driving member 85, comprising a part lamellar intended to move freely between the grinding wheels 21, 24 and the corresponding pressure rollers 55, and which has openings 86 adapted to receive and convey in their correct orientation the magnetic half-pots P to be machined.
  • This lamellar part is attached to a sort of mounting bar 87 which has an engagement orifice on one of the axes 84 and a buttonhole 88 for engagement on the adjacent axis 84, so as to accommodate the variation. center distance in the passage of the chain on the sprockets 70, 71.
  • These driving members are practically specific to each category of half-pots to be treated, according to their geometric shape or their dimensions, and it is understood that they are easily removable and replaceable with each change of category of half-pots to be machined.
  • the endless chain 69 is positively guided in its path using two opposite lateral guides 89a, 89b cooperating with the axes of the links and fixed on the support 15.
  • the openings 86 of the drive members 85 are supplied with magnetic half-pots P is provided by means of a chute G with the pieces P descending by gravity, placing in a vertical position a zone for the rectilinear passage of the openings 86, upstream from the roughing wheel station 21.
  • This chute is here constituted by two sections 90 shaped as a function of the contour of the half-pot and fixed by screws opposite one another on a support arm 91 , mounted in a bracket on a support rod 92 which is mounted adjustable in height on a base 93 for fixing on a edge of the support 15, and lockable by means of a clamping screw collar 94.
  • the pots are delivered one by one to the drive members 85 by adjusting the height of the chute G relative to the table 16, that is to say the height of the base of the profiles 90 relative to the latter and to a value greater than the thickness of a half-pot but less than the thickness of two stacked half-pots, so that a piece-by-piece supply of the openings 86 of the drive members 85 is automatically ensured.
  • the machine works with the directions of rotation of the drive chain and the grinding wheels indicated in the drawing by arrows.
  • the half-pots P selected one by one at the bottom of the chute G are driven in line by the driving members 85 on the table 16 and thus brought, firstly, to pass between the roughing wheel 21 and the roller corresponding presser 55, which is adjusted to crush by turning in contact with the bottom of the half-pot P and which thus ensures a given pressure which is adjustable and well distributed over the half-pot during its machining.
  • the same is true for the finishing passage between the finishing wheel 24 and the corresponding pressure roller 55.
  • the shelves 17a, 17b, 17c are here covered with aligned alumina wafers 95.
  • the support 15 of the table and therefore the latter is subjected to a prestressing under force greater than the bearing force of the half-pots P during their machining, this prestressing being here obtained by means of a screw device whose screw 96 freely crosses the table and is screwed into an upright 97 attached to the base plate 12, while it is provided with a support head 98 on the table and has a square drive 99 at its peak.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP81106477A 1980-08-22 1981-08-20 Machine de finition de pots magnétiques en ferrite Expired EP0046934B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8018357 1980-08-22
FR8018357A FR2489037A1 (fr) 1980-08-22 1980-08-22 Machine de finition de pots magnetiques en ferrite

Publications (2)

Publication Number Publication Date
EP0046934A1 EP0046934A1 (fr) 1982-03-10
EP0046934B1 true EP0046934B1 (fr) 1984-12-05

Family

ID=9245360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106477A Expired EP0046934B1 (fr) 1980-08-22 1981-08-20 Machine de finition de pots magnétiques en ferrite

Country Status (8)

Country Link
US (1) US4447990A (enrdf_load_stackoverflow)
EP (1) EP0046934B1 (enrdf_load_stackoverflow)
JP (1) JPS57114355A (enrdf_load_stackoverflow)
DE (1) DE3167619D1 (enrdf_load_stackoverflow)
FR (1) FR2489037A1 (enrdf_load_stackoverflow)
PL (1) PL135435B1 (enrdf_load_stackoverflow)
SU (1) SU1109075A3 (enrdf_load_stackoverflow)
YU (1) YU42026B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0366564A (ja) * 1989-08-02 1991-03-22 Asahi Glass Co Ltd 板状体の研磨方法及びその装置
CN104701005B (zh) * 2015-01-16 2017-02-22 王传东 一种自动旋转式内孔绕线电子滤波器多功能夹具
CN110014358B (zh) * 2019-04-22 2021-03-23 万泰机电工业(昆山)有限公司 超大曲率阀板的双面去毛刺方法
CN110890209A (zh) * 2019-11-13 2020-03-17 浙江盛业科技有限公司 一种静铁芯的表面加工设备
CN111640566B (zh) * 2020-05-20 2021-09-21 杭州三炻磁性材料有限公司 恒压恒磁钐钴粉末压制的工艺方法
CN114141515B (zh) * 2021-10-20 2024-04-02 东阳东磁自动化科技有限公司 一种罐形磁芯自动开气隙设备及其实现方法
CN115302343B (zh) * 2022-08-23 2023-08-29 泰州神舟传动科技有限公司 一种贯通轴表面精加工设备

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305731A (en) * 1919-06-03 Samtbiug-ma chiite
US518594A (en) * 1894-04-24 Combination book-rest and table or stand
US1976112A (en) * 1932-01-22 1934-10-09 Cincinnati Grinders Inc Grinding machine
US2145961A (en) * 1937-09-30 1939-02-07 John N Whitehouse Buffing machine
US2408334A (en) * 1944-07-31 1946-09-24 Pesco Products Co Lapping method and machine
US2796707A (en) * 1953-12-29 1957-06-25 Sommer & Maca Glass Machinery Endless conveyor
US3169446A (en) * 1962-03-08 1965-02-16 Gleason Works Work handling mechanism
US3499249A (en) * 1968-01-23 1970-03-10 Stevens & Co Inc J P Knife sharpening apparatus
US3636663A (en) * 1969-11-28 1972-01-25 Propper Mfg Co Inc Apparatus for matting glass slides
FR2184386B1 (enrdf_load_stackoverflow) * 1972-05-15 1980-02-01 Cit Alcatel
JPS5049793A (enrdf_load_stackoverflow) * 1973-09-04 1975-05-02
FR2293047A1 (fr) * 1974-11-27 1976-06-25 Telecommunications Sa Procede et dispositif de finition pour des pots magnetiques en ferrite

Also Published As

Publication number Publication date
FR2489037B1 (enrdf_load_stackoverflow) 1984-05-25
YU42026B (en) 1988-04-30
JPS6158269B2 (enrdf_load_stackoverflow) 1986-12-10
JPS57114355A (en) 1982-07-16
YU199681A (en) 1983-09-30
US4447990A (en) 1984-05-15
PL135435B1 (en) 1985-10-31
DE3167619D1 (en) 1985-01-17
PL232710A1 (enrdf_load_stackoverflow) 1982-04-26
SU1109075A3 (ru) 1984-08-15
EP0046934A1 (fr) 1982-03-10
FR2489037A1 (fr) 1982-02-26

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