US3867847A - Arrangement for raising and lowering or retaining the inductor in its upper most position in equipment - Google Patents

Arrangement for raising and lowering or retaining the inductor in its upper most position in equipment Download PDF

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Publication number
US3867847A
US3867847A US396472A US39647273A US3867847A US 3867847 A US3867847 A US 3867847A US 396472 A US396472 A US 396472A US 39647273 A US39647273 A US 39647273A US 3867847 A US3867847 A US 3867847A
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US
United States
Prior art keywords
cam
inductor
lifting arm
cam disc
roller
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 - Lifetime
Application number
US396472A
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English (en)
Inventor
Friedhelm Reinke
Edgar Stengel
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.)
SMS Elotherm GmbH
Original Assignee
AEG Elotherm GmbH
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 AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
Application granted granted Critical
Publication of US3867847A publication Critical patent/US3867847A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide

Definitions

  • ABSTRACT An improved apparatus for hardening elongated workpieces of the type having a pair of indexable spiders with centers for holding the workpieces as they are successively indexed through consecutive treating stations, a slotted plate which is mounted for rotation with the workpieces, a roller which moves on a curve generated by a four-bar linkage working in the slots, a cam disc rotating as the roller moves and having a cam contour which cooperates with a follower roller on a lifting arm for a heating inductor at one of the stations and means for locking the lifting arm in a position with the inductor withdrawn.
  • the locking means includes a second cam member which also engages the lifting arm and control switches for causing the second cam member to prevent the inductor from returning to its station when no workpiece is being advanced to the inductor station.
  • the invention relates to an arrangement for raising and lowering or retaining the inductor in its uppermost position in equipment for inductively hardening elongated workpieces which are mounted between centers on the arms of a pair of spiders indexable into several consecutive treating stations by a slotted plate which is mounted with the spiders and coaxial therewith, a roller which moves on a curve'generated by a four-bar linkage working in the slots, while the shaft driving one crank of the linkage carries a substantially reniform cam disc of which the peripheral cam contour cooperates with a follower roller on a lifting arm which carries the heating inductor, and which extends within range of a locking means.
  • a workpiece may not be present between the pair of carrier arms which are about to be indexed to the heating station.
  • the inductor should be prevented from being lowered and possibly colliding with the centers which in the absence of a workpiece may project some distance into the path of the inductor.
  • the lifting arm for raising the inductor is arranged to be lockable by a spring-loaded detent which is retained in inoperative position by an electromagnet.
  • a switch or sensor located between the centers at the loading station detects the absence of a workpiece, the switch or sensor causes the electromagnet to be deenergized and the detent to be propelled under the lifting arm by its spring, thereby preventing the arm from descending and lowering the inductor.
  • This device for locking the inductor by means of a detent is capable only of keeping the inductor in a position determined by the position of the detent. When the position of the inductor is to be adjusted this limitation is felt to be a defect.
  • the inductor can be raised and lowered and retained at any desired distance from the workpiece.
  • the improved apparatus includes control means comprising limit switches for controlling the rotation of the second cam disc from a first angular end position to a second angular end position.
  • control means comprise switching elements for interrupting and reversing the rotation of the second cam disc in any possible angular position.
  • a slotted plate 3 is rigidly connected to the pair of spiders, three slots 4, 5 and 6 extending radially from the center of the plate at relative angular intervals of In the position of the spiders shown in the drawing, the workpiece 2 which is gripped by the centers of the pair of carrier arms 1 is in heating position under an inductor 7 which is mounted on the end of a lever arm 8.
  • This lever arm 8, which also carries the transformer 9 required for feeding the inductor 7, is mounted on a shaft 10 rotatably mounted in the machine frame.
  • a lifting arm 11 which is likewise mounted on the end of shaft 10
  • a follower roller 12 adapted to ride on the circumference of a substantially reniform cam disc 13 which is mounted on a shaft 15 rotating in hearings in the machine frame.
  • This shaft 15 which can be driven by a motor 16 and a worm gear transmission (not shown) simultaneously serves for driving a four-bar linkage comprising a crank 20 affixed to shaft 15, an oscillating arm 17 mounted in the machine frame, and a link 14 which is pivotably attached to the crank 20 and to the oscillator 17.
  • a roller 18 which is mounted on the link and engages the slots in the slotted disc 3 moves in a loop 19 which comprises two path sections extending roughly radially from and to the disc center.
  • the workpiece 2 which revolves on centers underneath the inductor 7 is in course of being inductively heated.
  • the motor 16 is started, automatically or manually, and turns the shaft 15 together with the reniform cam disc 13 in the clockwise direction, the cam follower l2 riding on the circumference of the cam. Since the radius under the rol ler 12 first increases, the follower roller 12 and the lifting arm are first lifted and the inductor 7 which is connected to them by the shaft and the arm 8 is swung away from the workpiece 2 which is has heated.
  • a shaft 22 which is reversibly drivable in bearings in the machine frame by a geared motor 21, and which carries a second cam disc 23.
  • This cam disc 23 which cooperates with a second follower roller 24 mounted on the lifting arm 11 has a cam contour having a radius which, within a predetermined angular range, increases as a monotonous function of its angle of rotation.
  • the lifting arm 11 is locked by means of the second cam disc 23 as follows. While the workpiece 2 between the centers on the radial spider arms 1 is being inductively heated, the next workpiece 2 is gripped between the centers of the arms 1, the workpiece being presented to them in this position. If now, for any reason whatsoever, a workpiece should not have been mounted or, if the presented workpiece has not been gripped because it differs too much from its required shape, then the absence of the workpiece is detected by a switch or sensor 30 and a corresponding signal is generated. The effect of this signal is that at the end of the inductive heating of the workpiece 2, the motor 21 will be started at the same time as the motor 16 for driving the cam disc 13.
  • the motor 21 therefore rotates the cam disc 23 counterclockwise at a speed which is low enough to avoid contact between the cam disc 23 and the follower roller 24 on the lifting arm 11 during the raising of the lifting arm 11 by the cam disc 13. Not until the lifting arm 11 and hence the inductor 7 have arrived in their uppermost positions will the cam 23 catch up with and make contact with the follower roller 24 on the lifting arm 11.
  • a suitably located limit switch 32 switches the motor 21 off at this instant and thus stops the further rotation of the second cam disc 23.
  • the lifting arm 11 and the inductor 7 are thus locked in their upper positions by the cam 23 irrespectively of the continued operation of cam disc 13.
  • the second cam 23 serves the additional purpose of moving the inductor 7 into any desired position be tween its position for heating and its inactive position when fully raised, for instance for purposes of adjustment. This is done by keeping the cam 13 stationary in its starting position and raising the lifting arm 11 by rotating the cam 23 which will now make continuous contact with the roller.
  • the control system comprising the limit switches for controlling rotation of the second cam 23 is equipped with overriding switch means 34 which permit rotation of this second cam 23 to be stopped or reversed in any angular position.
  • control means comprise switching elements for interrupting and reversing the rotation of the second cam disc in any possible angular position.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)
US396472A 1972-09-13 1973-09-12 Arrangement for raising and lowering or retaining the inductor in its upper most position in equipment Expired - Lifetime US3867847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2244847A DE2244847C2 (de) 1972-09-13 1972-09-13 Einrichtung zum Anheben und Absenken bzw Festhalten des Induktors in seiner höchsten Stellung an Vorrichtungen zum induktiven Harten von langgestreckten Werkstucken

Publications (1)

Publication Number Publication Date
US3867847A true US3867847A (en) 1975-02-25

Family

ID=5856186

Family Applications (1)

Application Number Title Priority Date Filing Date
US396472A Expired - Lifetime US3867847A (en) 1972-09-13 1973-09-12 Arrangement for raising and lowering or retaining the inductor in its upper most position in equipment

Country Status (6)

Country Link
US (1) US3867847A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5231295B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2244847C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2198999B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1434628A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT1046206B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244847C2 (de) * 1972-09-13 1973-10-31 Aeg-Elotherm Gmbh, 5630 Remscheidhasten Einrichtung zum Anheben und Absenken bzw Festhalten des Induktors in seiner höchsten Stellung an Vorrichtungen zum induktiven Harten von langgestreckten Werkstucken

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1913092A (en) * 1931-12-10 1933-06-06 Rosenberg Heyman Heat treating apparatus for metal work
US2009481A (en) * 1932-02-19 1935-07-30 William A Darrah Heat treating machine
US2535110A (en) * 1946-02-28 1950-12-26 Carnegie Illinois Steel Corp Method of heat-treating wheels
US3441703A (en) * 1967-07-01 1969-04-29 Aeg Elotherm Gmbh Inductive heating apparatus
US3653268A (en) * 1970-03-10 1972-04-04 John C Diepeveen Tool moving mechanism
US3664203A (en) * 1969-12-18 1972-05-23 Sperry Rand Corp Shaft positioning apparatus
US3732741A (en) * 1970-06-05 1973-05-15 Wean Damiron Devices for controlling the carriage of a portable shear

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244847C2 (de) * 1972-09-13 1973-10-31 Aeg-Elotherm Gmbh, 5630 Remscheidhasten Einrichtung zum Anheben und Absenken bzw Festhalten des Induktors in seiner höchsten Stellung an Vorrichtungen zum induktiven Harten von langgestreckten Werkstucken

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1913092A (en) * 1931-12-10 1933-06-06 Rosenberg Heyman Heat treating apparatus for metal work
US2009481A (en) * 1932-02-19 1935-07-30 William A Darrah Heat treating machine
US2535110A (en) * 1946-02-28 1950-12-26 Carnegie Illinois Steel Corp Method of heat-treating wheels
US3441703A (en) * 1967-07-01 1969-04-29 Aeg Elotherm Gmbh Inductive heating apparatus
US3664203A (en) * 1969-12-18 1972-05-23 Sperry Rand Corp Shaft positioning apparatus
US3653268A (en) * 1970-03-10 1972-04-04 John C Diepeveen Tool moving mechanism
US3732741A (en) * 1970-06-05 1973-05-15 Wean Damiron Devices for controlling the carriage of a portable shear

Also Published As

Publication number Publication date
FR2198999A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-05
GB1434628A (en) 1976-05-05
DE2244847B1 (de) 1973-04-05
JPS4969503A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-05
JPS5231295B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-08-13
DE2244847C2 (de) 1973-10-31
IT1046206B (it) 1980-06-30
FR2198999B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-02-25
DE2244847A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-04-05

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