EP0722810A1 - Federendenschleifmaschine - Google Patents

Federendenschleifmaschine Download PDF

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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
English (en)
French (fr)
Other versions
EP0722810B1 (de
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/de
Application granted granted Critical
Publication of EP0722810B1 publication Critical patent/EP0722810B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 Federendenschleifmaschine Expired - Lifetime EP0722810B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=11370251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95830546A Expired - Lifetime EP0722810B1 (de) 1995-01-19 1995-12-29 Federendenschleifmaschine

Country Status (3)

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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1520658A1 (de) * 2003-09-26 2005-04-06 KA.MA S.r.l. Vorrichtung und Verfahren zum Schleifen von Spiralfedern
EP1588799A1 (de) * 2004-04-23 2005-10-26 KA.MA. S.r.l. Schleifmaschine für Spiralfedern
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 (de) * 2018-07-16 2020-01-22 Officina Meccanica Domaso SpA Federendenschleifmaschine

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 (de) * 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 (de) * 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 (de) * 2003-09-26 2005-04-06 KA.MA S.r.l. Vorrichtung und Verfahren zum Schleifen von Spiralfedern
EP1588799A1 (de) * 2004-04-23 2005-10-26 KA.MA. S.r.l. Schleifmaschine für Spiralfedern
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 (de) * 2018-07-16 2020-01-22 Officina Meccanica Domaso SpA Federendenschleifmaschine
EP4234162A1 (de) * 2018-07-16 2023-08-30 OFFICINA MECCANICA DOMASO S.p.A. Federendenschleifmaschine

Also Published As

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

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