DE3207748C1 - Device for heating the surfaces of camshafts or cam followers - Google Patents
Device for heating the surfaces of camshafts or cam followersInfo
- Publication number
- DE3207748C1 DE3207748C1 DE3207748A DE3207748A DE3207748C1 DE 3207748 C1 DE3207748 C1 DE 3207748C1 DE 3207748 A DE3207748 A DE 3207748A DE 3207748 A DE3207748 A DE 3207748A DE 3207748 C1 DE3207748 C1 DE 3207748C1
- Authority
- DE
- Germany
- Prior art keywords
- distance
- arc
- constant
- camshafts
- heating
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims description 4
- 101100537937 Caenorhabditis elegans arc-1 gene Proteins 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- 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
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)
Description
Die Erfindung bezieht sich auf eine Einrichtung zum Erwärmen der Oberfläche von Nockenwellen oder Nockenfolgern mittels eines Lichtbogenbrenners entlang einer Spur mit einem zur Nockenwelle abstandsveränderlich gelagerten Lichtbogenbrenner mit einem Stellmotor zur Veränderung des Abstandes und einen auf den Stellmotor einwirkenden Regler zur Herbeiführung eines konstanten Abstandes zwischen Lichtbogenbrenner und der zu erwärmenden Oberfläche der Nockenwelle.The invention relates to a device for heating the surface of camshafts or Cam followers by means of an arc torch along a track with a variable distance to the camshaft mounted arc torch with a servomotor to change the distance and a Regulator acting on the servomotor to bring about a constant distance between the arc torch and the surface of the camshaft to be heated.
In bekannten Einrichtungen zur Härtung von gußeisernen Werkstücken durch Aufschmelzen einer Spur auf der Oberfläche des Werkstücks mittels eines Lichtbogenbrenners und nachfolgendes Abschrecken des Werkstücks, z. B. durch Selbstabschreckung, ist es bekannt, den Lichtbogenbrenner über Hebelgetriebe mittels einer Meistemocke so zu steuern, daß die Lichtbogenflamme eine konstante Länge aufweist (DE-PS 27 03 469).In known devices for hardening cast iron workpieces by melting a Trace on the surface of the workpiece by means of an arc torch and subsequent quenching of the workpiece, e.g. B. by self-deterrence, it is known to operate the arc torch via lever gear to be controlled by means of a master mock so that the arc flame has a constant length (DE-PS 27 03 469).
Die Erfindung befaßt sich mit der Aufgabe, für derartige und ähnliche Einrichtungen eine einfache Regelung zu schaffen, die es ermöglicht, den Abstand zwischen dem Brenner und der Oberfläche des zu erhitzenden Werkstücks konstant zu halten.The invention is concerned with the object of a simple for such and similar devices To create regulation that makes it possible to adjust the distance between the burner and the surface of the to keep the heated workpiece constant.
Aus dem Fachbuch »Hütte« IV A Starkstromtechnik, 1957, S. 666 ist eine Regelung des Abstandes der Elektroden in einem Dreiphasen-Elektrolichtbogenofen beschrieben. Infolge des Abbrandes der Graphit-Elektroden müssen diese zur Konstanthaltung der elektrischen Leistung nachgestellt werden. Als Regelgrößen dienen Strom und Spannung, wobei ein fortlaufender Vergleich mit einem Hilfsmeßstrom erfolgt, der bei Abweichung einen Regelimpuls auslöst. Diese Art der Regelung ist verhältnismäßig aufwendig.From the textbook "Hut" IV A Starkstromtechnik, 1957, p. 666 is a regulation of the distance Electrodes in a three-phase electric arc furnace described. As a result of the graphite electrodes being burned off these must be readjusted to keep the electrical power constant. As controlled variables are used for current and voltage, with a continuous comparison being made with an auxiliary measuring current at Deviation triggers a control pulse. This type of regulation is relatively complex.
Erfindungsgemäß wird die gestellte Aufgabe bei Einrichtungen der eingangs erwähnten Art dadurch gelöst, daß als Regelgröße für die Abstandseinhaltung bei konstantem Lichtbogenstrom, die KonstanthaltungAccording to the invention, the task set is thereby achieved in devices of the type mentioned at the outset solved that as a control variable for maintaining the distance at a constant arc current, keeping constant
ίο der Lichtbogenspannung dient.ίο is used for the arc voltage.
Durch die Erfindung wird es möglich, auf verhältnismäßig einfache Weise den Abstand des Brenners zur Werkstückoberfläche konstant zu halten, indem bei Spannungsänderungen ein Impuls auf den Stellmotor gegeben wird, der den Brenner relativ zum Werkstück bewegt, bis Spannungskonstanz und damit Abstandsgleichheit wieder hergestellt ist.The invention makes it possible to use relatively simple way to keep the distance between the torch and the workpiece surface constant by using Voltage changes a pulse is given to the servomotor, which moves the torch relative to the workpiece moves until the voltage is constant and thus the distance is equal again.
Die anliegende Figur zeigt ein einfaches Ausführungsbeispiel. The attached figure shows a simple embodiment.
In der Figur bezeichnet 1 den Lichtbogen, der zwischen dem Werkstück 2, einer gußeisernen Nockenwelle, und einem Lichtbogenbrenner 3 mit nicht abschmelzender Wolfram-Katode 4 unter Schutzgas-Zuführung über den Brennerstutzen 5 erzeugt wird.In the figure, 1 denotes the arc that occurs between the workpiece 2, a cast-iron camshaft, and an arc torch 3 with a non-melting tungsten cathode 4 with a protective gas supply is generated via the burner socket 5.
Der Lichtbogen 1 wird über den Gleichstrom-Generator 6 mit einem konstanten Lichtbogenstrom k
gespeist. Mit 7 ist ein Hochfrequenz-Zündstromgenerator zur Erzeugung eines Zündstromes /^bezeichnet.
Der Abstand ζ zwischen dem Lichtbogenbrenner 3 und der Oberfläche der Nockenwelle 2 ist abstandsveränderlich
durch entsprechende Lagerung des Lichtbogenbrenners. Der Abstand ζ ist über ein Getriebe 8
verstellbar. Zur Verstellung dient ein Motor 9. Der Abstand zwischen dem Brenner 3 und der Oberfläche
der Nocke 2 wird Messung des Spannungsabfalles am Lichtbogen 1 über die Leitungen 10 und 1OA mittels
eines Diskriminators 11 ermittelt. Ein entsprechender Strom wird über die Leitung 12 einem Regler 13, an dem
mittels eines Potentiometers 11 ein Sollwert vorgebbar ist, als Istwert zugeführt. Der mit einem Proportionalanteil
ausgestattete Regler steuert über die Leitung 15 den Motor 9.The arc 1 is fed with a constant arc current k via the direct current generator 6. 7 with a high-frequency ignition current generator for generating an ignition current / ^ is referred to.
The distance ζ between the arc torch 3 and the surface of the camshaft 2 can be changed in distance by appropriate mounting of the arc torch. The distance ζ can be adjusted via a gear 8. A motor 9 is used for adjustment. The distance between the torch 3 and the surface of the cam 2 is determined by measuring the voltage drop across the arc 1 via the lines 10 and 10A by means of a discriminator 11. A corresponding current is fed as an actual value via the line 12 to a regulator 13 on which a setpoint value can be specified by means of a potentiometer 11. The controller equipped with a proportional component controls the motor 9 via the line 15.
Die Erfindung ist auch auf solche Erwärmungseinrichtungen für Nockenwellen anwendbar, bei denen der Brenner und das Werkstück, das im Ausführungsbeispiel entlang der Drehachse des Werkstücks oszillierend gelagert ist, nach drei Koordinaten relativ verstellbar sind.The invention is also applicable to such heating devices Applicable for camshafts in which the torch and the workpiece, in the exemplary embodiment is mounted oscillating along the axis of rotation of the workpiece, relatively adjustable according to three coordinates are.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3207748A DE3207748C1 (en) | 1982-03-04 | 1982-03-04 | Device for heating the surfaces of camshafts or cam followers |
| IT47807/83A IT1166411B (en) | 1982-03-04 | 1983-02-25 | DEVICE FOR HEATING OF CAMSHAFT SURFACES OR CAM SUCCESSIONS |
| FR838303226A FR2522689B1 (en) | 1982-03-04 | 1983-02-28 | DEVICE FOR HEATING THE SURFACE OF CAMSHAFTS OR THE CAM TRACKER |
| JP58033015A JPS58164729A (en) | 1982-03-04 | 1983-03-02 | Device for heating cam shaft or inverted cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3207748A DE3207748C1 (en) | 1982-03-04 | 1982-03-04 | Device for heating the surfaces of camshafts or cam followers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3207748C1 true DE3207748C1 (en) | 1983-10-06 |
Family
ID=6157279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3207748A Expired DE3207748C1 (en) | 1982-03-04 | 1982-03-04 | Device for heating the surfaces of camshafts or cam followers |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS58164729A (en) |
| DE (1) | DE3207748C1 (en) |
| FR (1) | FR2522689B1 (en) |
| IT (1) | IT1166411B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3910280A1 (en) * | 1989-03-30 | 1990-10-11 | Aeg Elotherm Gmbh | Method for the remelt-hardening of metallic workpieces |
| DE4132277A1 (en) * | 1990-09-27 | 1992-04-09 | Mazda Motor | METHOD AND DEVICE FOR CARRYING OUT A MELTING / HARDNESS TREATMENT |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703469C3 (en) * | 1977-01-28 | 1979-11-22 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Device for hardening the cam surfaces of camshafts for internal combustion engines |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2659188A1 (en) * | 1975-12-29 | 1977-07-07 | Union Carbide Corp | Plasma arc cutting control - by comparing arc voltage with stored stable voltage for height motor feed |
| JPS551948A (en) * | 1978-06-21 | 1980-01-09 | Nippon Steel Corp | Automatic control method of arc length in tig automatic welding |
| JPS5581084A (en) * | 1978-12-15 | 1980-06-18 | Daihen Corp | Nonconsumable electrode arc welding equipment |
| JPS55114470A (en) * | 1979-02-27 | 1980-09-03 | Daihen Corp | Tig arc spot welding method |
-
1982
- 1982-03-04 DE DE3207748A patent/DE3207748C1/en not_active Expired
-
1983
- 1983-02-25 IT IT47807/83A patent/IT1166411B/en active
- 1983-02-28 FR FR838303226A patent/FR2522689B1/en not_active Expired
- 1983-03-02 JP JP58033015A patent/JPS58164729A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703469C3 (en) * | 1977-01-28 | 1979-11-22 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Device for hardening the cam surfaces of camshafts for internal combustion engines |
Non-Patent Citations (1)
| Title |
|---|
| Hütte, IV A Starkstromtechnik, 1957, S. 470-666 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3910280A1 (en) * | 1989-03-30 | 1990-10-11 | Aeg Elotherm Gmbh | Method for the remelt-hardening of metallic workpieces |
| DE4132277A1 (en) * | 1990-09-27 | 1992-04-09 | Mazda Motor | METHOD AND DEVICE FOR CARRYING OUT A MELTING / HARDNESS TREATMENT |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2522689A1 (en) | 1983-09-09 |
| FR2522689B1 (en) | 1989-02-10 |
| IT1166411B (en) | 1987-04-29 |
| IT8347807A0 (en) | 1983-02-25 |
| JPS58164729A (en) | 1983-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of patent without earlier publication of application | ||
| D1 | Grant (no unexamined application published) patent law 81 | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |