EP0722810A1 - Machine à meuler des ressorts de compression - Google Patents

Machine à meuler des ressorts de compression Download PDF

Info

Publication number
EP0722810A1
EP0722810A1 EP95830546A EP95830546A EP0722810A1 EP 0722810 A1 EP0722810 A1 EP 0722810A1 EP 95830546 A EP95830546 A EP 95830546A EP 95830546 A EP95830546 A EP 95830546A EP 0722810 A1 EP0722810 A1 EP 0722810A1
Authority
EP
European Patent Office
Prior art keywords
supporting table
grinding
loading
axis
grinding machine
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
EP95830546A
Other languages
German (de)
English (en)
Other versions
EP0722810B1 (fr
Inventor
Ermenegildo Ragni
Gabriella Kunz
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.)
OMD OFFICINA MECCANICA DOMASO SpA
Original Assignee
OMD OFFICINA MECCANICA DOMASO SpA
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 OMD OFFICINA MECCANICA DOMASO SpA filed Critical OMD OFFICINA MECCANICA DOMASO SpA
Publication of EP0722810A1 publication Critical patent/EP0722810A1/fr
Application granted granted Critical
Publication of EP0722810B1 publication Critical patent/EP0722810B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • 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
    • B24B7/167—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings end faces coil springs

Definitions

  • the present invention relates to a compression spring grinding machine, of high operation or use flexibility.
  • the springs and, in particular, the springs provided for operating under compression are usually subjected, during the production thereof, to a grinding operation, for grinding the axial end portions of the spring so as to bring these axial end portions to lay on planes which are substantially perpendicular to the axis of the spring.
  • This grinding operation is conventionally performed by suitable grinding machines which comprises a grinding station, in which are arranged two opposite grinding wheels.
  • the springs to be ground are loaded into suitable seats provided in a loading disc, having an axis parallel to the axis of the grinding wheels, which is rotatably driven about the axis thereof, so as to progressively bring the springs between the grinding wheels, in order to be ground.
  • the grinding of the spring can be performed by a single passage between the grinding wheels, which are held at a set spacing from one another, or by successive passage of the springs between said grinding wheels, the latter being progressively displaced to one another.
  • the single-pass grinding operation which is preferred for springs made of a comparatively small diameter wire, is conventionally performed on grinding machines including a loading disc of large diameter, which is rotatively driven about the axis thereof with a suitably low speed.
  • the diameter of the grinding wheels is so selected that a given thickness of the wire and a given size of the spring can be ground by a single passage between the grinding wheels.
  • mandrels are rotatively driven about respective axes thereof, so as to cause the related loaded disc to turn, whereas to the supporting table is applied an intermittent rotary movement so as to bring, in turn, a loading disc to the grinding station and then to bring, by turning the related loading disc, the springs under the action of the grinding wheels, which are progressively displaced towards one another, during the several operating passages.
  • Such a machine, of the two loading disc type can not be used for performing a single-pass grinding operation, since the space for loading the loading disc to the grinding position thereof, is not sufficient.
  • the aim of the present invention is to solve the above disclosed problems by providing a grinding machine which is specifically designed to both perform the grinding of compression springs in a single pass and in several subsequent passages, and which, moreover, can use both large diameter loading discs and small diameter loading discs, so as to meet different use requirements, while providing a very high production yield.
  • a main object of the present invention is to provide such a compression spring grinding machine, which is very safe and flexible in operation and which, moreover, is very competitive from a mere economic standpoint.
  • a highly flexible compression spring grinding machine characterized in that said machine comprises: a supporting table, rotatable about an axis thereof; first driving means for driving said supporting table with either a continuous or intermittent motion about the axis thereof; at least two mandrels, having axes parallel to the axis of the supporting table, rotatably supported, about their respective axes, to said supporting table, projecting from a loading face thereof and angularly spaced from one another about the axis of the supporting table; a major loading disc, which can be coaxially mounted on the loading face of the supporting table; at least two minor loading discs, having a diameter less than the diameter of said major loading disc, which can be mounted on said loading face of said supporting table coaxially of said mandrels, alternately to the major loading disc; a grinding station, including a pair of grinding wheels, opposite to the laying plane
  • the grinding machine according to the present invention which has been generally indicated by the reference number 1, comprises a supporting table 2, having a substantially disc-like configuration, and having a vertical axis 2a.
  • the supporting table 2 in particular, is rotatably supported so as to turn about the axis 2a thereof, by a base 3, on which are arranged first driving means for driving said supporting table 2 with a rotary movement about the axis thereof, either continuous or intermittent, depending on requirements, as it will become more apparent hereinafter.
  • the first driving means comprises a motor-reducing unit 4, arranged on the supporting base 3 of the machine and coupled, by the output shaft thereof, to a main shaft 4, having an axis coinciding with the axis 2a, and its top end portion rigidly restrained to the supporting table 2.
  • the supporting table 2 With the supporting table 2 are associated at least two mandrels 5 and 6 which have vertical axes 5a and 6a and project from the two opposite surfaces or faces of the supporting table 2.
  • the machine further comprises a major loading disc 7, which can be arranged on the loading face of the supporting table 2, or on the top face thereof, and which is provided with two holes 8 and 9, to allow those portions of the mandrels 5 and 6 projecting on the top from the loading face of the supporting table 2 to pass therethrough; on the major loading disc 7, moreover, is provided a plurality of seats 10 in which can be arranged the compression springs to be ground.
  • the subject grinding machine further comprises at least two minor loading discs, indicated by 12 and 13, which have a diameter less than the diameter of the major loading disc 7, and are arranged on the loading face of the supporting table 2.
  • the minor loading discs 12 and 13 are provided with respective central holes 14, 15, by means of which a respective minor loading disc is engaged, in a rotatively rigid manner, with the related mandrel 5 or 6.
  • the minor loading discs 12 and 13 are also provided with a plurality of seats or recesses 16, in which can be arranged the compression springs to be ground.
  • a grinding station 17 in which are provided two grinding wheels 18 and 19, having vertical axes, and arranged coaxially of one another; the two grinding wheels 18 and 19 are arranged oppositely facing the laying plane of the supporting table 2 and are driven, in a known manner, with a rotary movement about their axes 20, by a motor-reducing driving unit.
  • At least one of the grinding wheels 18 and 19 can be controllably displaced along the related axis 20, so as to change the mutual spacing of the grinding wheel depending on the grinding requirements.
  • the mandrels 5 and 6 are rotatable supported, about their respective axes 5a and 6a, by the supporting table 2; moreover, second driving means are provided, for rotatively driving the mandrels 5 and 6, at least as the respective minor loading disc 12 or 13, is arranged at the grinding station 17.
  • the second driving means comprise a motor-reducing unit or assembly 21, which is arranged under the supporting disc 2 and is provided with an output shaft, which can be either connected to, or disconnected from, one of the mandrels, 5 or 6, as the latter is arranged near the grinding station 17.
  • a half clutch 22 for example a toothed half-clutch, which can be coupled to a further half-clutch 23, in turn connected to the bottom end portions of the mandrels 5 and 6.
  • the grinding machine according to the present invention operates as follows.
  • the major or larger loading disc 2 thereon are arranged the compression spring to be ground; the grinding wheels 18 and 19 are set at a proper spacing from one another, so as to perform the grinding operation by a single-passage.
  • the motor reducing unit 4 is so operated as to cause the supporting table 2 and, accordingly, the loading disc 7, to be turned with a small speed, to bring progressively the compression springs arranged on the loading disc 7 under the action of the grinding wheels 18 and 19 which will grind, by a single passage, both the end portions of the compression springs, projecting from the two faces of the loading disc 7.
  • the motor-reducing unit 4 is so operated as to cause the supporting table 2 to be reciprocately turned, or intermittently turned, through 180°, so as to respectively locate a smaller or minor loading disc, 12 or 13, at the grinding station 17.
  • the half-clutch 23 of one of the mandrels, 5 or 6, will be arranged at the half-clutch 22, mounted on the output shaft 21a of the motor-reducing unit 21.
  • the two half-clutches 22 and 23 will be connected to one another, and the motor-reducing unit 21 will be operated so as to progressively bring the compression springs provided on the smaller loading disc 12 or 13, arranged at the grinding station 17, between the grinding wheels 18 and 19.
  • the grinding of the springs arranged on the loading discs 12 and 13 is performed through several passages or operations, by suitably changing the distance of the grinding wheels 18 and 19, for each subsequent working operation, to the end of the grinding processing of the springs.
  • a high yield grinding machine which is specifically designed for grinding compression springs, either by a single path, or by several subsequent passes, by varying the mutual spacing of the grinding wheels, while using a single larger diameter loading disc, or a plurality of smaller diameter smaller discs.
  • the used materials, as well as the contingent size and shapes can be any, depending on requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP95830546A 1995-01-19 1995-12-29 Machine à meuler des ressorts de compression Expired - Lifetime EP0722810B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI950082 1995-01-19
ITMI950082A IT1273433B (it) 1995-01-19 1995-01-19 Macchina rettificatrice per molle a compressione,ad elevata versatilita' di impiego

Publications (2)

Publication Number Publication Date
EP0722810A1 true EP0722810A1 (fr) 1996-07-24
EP0722810B1 EP0722810B1 (fr) 1999-04-07

Family

ID=11370251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95830546A Expired - Lifetime EP0722810B1 (fr) 1995-01-19 1995-12-29 Machine à meuler des ressorts de compression

Country Status (3)

Country Link
EP (1) EP0722810B1 (fr)
DE (1) DE69508907T2 (fr)
IT (1) IT1273433B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1520658A1 (fr) * 2003-09-26 2005-04-06 KA.MA S.r.l. Appareil et méthode pour meuler des ressorts à spirale
EP1588799A1 (fr) * 2004-04-23 2005-10-26 KA.MA. S.r.l. Machine à meuler des ressorts hélicoidaux
CN102490096A (zh) * 2011-11-11 2012-06-13 绍兴市家度弹簧机械有限公司 立式磨床的下磨头托盘结构
DE102012203617A1 (de) * 2012-03-07 2013-09-12 Wafios Ag Federendenschleifmaschine mit mehreren Ladetellern
CN104364050A (zh) * 2012-02-01 2015-02-18 瓦菲奥斯股份公司 用于磨削弹簧端部的方法和弹簧端部磨削机
CN105722640A (zh) * 2013-06-14 2016-06-29 瓦菲奥斯股份公司 用于磨削弹簧端部的方法以及弹簧端部磨削机
JP2018034253A (ja) * 2016-08-31 2018-03-08 旭精機工業株式会社 研削装置
JP2018051644A (ja) * 2016-09-27 2018-04-05 旭精機工業株式会社 研削装置
EP3597362A1 (fr) * 2018-07-16 2020-01-22 Officina Meccanica Domaso SpA Rectifieuse d'extrémités de ressorts

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353975A (fr) * 1963-04-23 1964-02-28 Machine à meuler simultanément les deux extrémités de ressorts à boudin
DE1502470A1 (de) * 1964-07-29 1969-10-23 Kunz Beck Emil Schleifmaschine
FR1599254A (fr) * 1967-12-15 1970-07-15
GB1207757A (en) * 1967-12-15 1970-10-07 Karl Hack Kommanditgesellschaf A spring-end grinding machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353975A (fr) * 1963-04-23 1964-02-28 Machine à meuler simultanément les deux extrémités de ressorts à boudin
DE1502470A1 (de) * 1964-07-29 1969-10-23 Kunz Beck Emil Schleifmaschine
FR1599254A (fr) * 1967-12-15 1970-07-15
GB1207757A (en) * 1967-12-15 1970-10-07 Karl Hack Kommanditgesellschaf A spring-end grinding machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1520658A1 (fr) * 2003-09-26 2005-04-06 KA.MA S.r.l. Appareil et méthode pour meuler des ressorts à spirale
EP1588799A1 (fr) * 2004-04-23 2005-10-26 KA.MA. S.r.l. Machine à meuler des ressorts hélicoidaux
CN102490096A (zh) * 2011-11-11 2012-06-13 绍兴市家度弹簧机械有限公司 立式磨床的下磨头托盘结构
CN104364050A (zh) * 2012-02-01 2015-02-18 瓦菲奥斯股份公司 用于磨削弹簧端部的方法和弹簧端部磨削机
US9283654B2 (en) 2012-02-01 2016-03-15 Wafios Ag Method of grinding spring ends and spring end grinding machine
DE102012203617A1 (de) * 2012-03-07 2013-09-12 Wafios Ag Federendenschleifmaschine mit mehreren Ladetellern
CN105722640A (zh) * 2013-06-14 2016-06-29 瓦菲奥斯股份公司 用于磨削弹簧端部的方法以及弹簧端部磨削机
CN105722640B (zh) * 2013-06-14 2018-05-15 瓦菲奥斯股份公司 用于磨削弹簧端部的方法以及弹簧端部磨削机
JP2018034253A (ja) * 2016-08-31 2018-03-08 旭精機工業株式会社 研削装置
JP2018051644A (ja) * 2016-09-27 2018-04-05 旭精機工業株式会社 研削装置
EP3597362A1 (fr) * 2018-07-16 2020-01-22 Officina Meccanica Domaso SpA Rectifieuse d'extrémités de ressorts
EP4234162A1 (fr) * 2018-07-16 2023-08-30 OFFICINA MECCANICA DOMASO S.p.A. Rectifieuse d'extrémités de ressorts

Also Published As

Publication number Publication date
EP0722810B1 (fr) 1999-04-07
ITMI950082A0 (it) 1995-01-19
DE69508907T2 (de) 1999-08-26
ITMI950082A1 (it) 1996-07-19
IT1273433B (it) 1997-07-08
DE69508907D1 (de) 1999-05-12

Similar Documents

Publication Publication Date Title
EP0722810A1 (fr) Machine à meuler des ressorts de compression
JPS63216660A (ja) 往復動裁断ブレードの切刃を研磨する装置及び方法
JPS6268268A (ja) ジヤイロ研磨機用工作物軸の駆動装置
US4439951A (en) Grinding machine
US6722961B2 (en) Polishing machine for wheel rims
US5807166A (en) Glass-plate working machine
US3376672A (en) Abrading machine with a plurality of abrasive wheels
US2364506A (en) Grinding machine
CN106625123A (zh) 一种圆形冲压件的数控冲压机床
US4534133A (en) Machine for superfinishing annular workpieces
US2377992A (en) Automatic turret grinding or polishing machine
US1440386A (en) Polishing and grinding machine
US4218800A (en) Planetary grinder and polisher
US2784649A (en) Machine tool for the production of blades of centrifugal machines
JP4250594B2 (ja) 遊星ギヤ機構を用いた移動装置及び平面研磨機
US4735080A (en) Forming machine with ram-side ejector mechanism
JPS58126051A (ja) 復合回転型の平面研削盤
EP0242845A2 (fr) Tête support d'abrasif pour machines de polissage
JPH07314305A (ja) バリ取り装置
EP0673715B1 (fr) Machine d'usinage d'une plaque de verre
JP2684329B2 (ja) 角度方向及び縦方向に運動するダイヤモンドツールホルダー用の単一モーター駆動装置
US3299582A (en) Crankshaft-simulating dresser
US3375613A (en) Machine for grinding parts according to a jig contour
SU92105A1 (ru) Автоматический станок дл обдирки наждачным кругом внутренних цилиндрических поверхностей кольцевых заготовок
US2766556A (en) Work piece storage place for lapping machines

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19961111

17Q First examination report despatched

Effective date: 19970702

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: DOTT. FRANCO CICOGNA

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990407

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990407

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69508907

Country of ref document: DE

Date of ref document: 19990512

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991229

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991229

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20141216

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150129

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20141224

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69508907

Country of ref document: DE