DE887354C - Arrangement for inductive heating of toothed wheels for the purpose of surface hardening - Google Patents
Arrangement for inductive heating of toothed wheels for the purpose of surface hardeningInfo
- Publication number
- DE887354C DE887354C DES12492D DES0012492D DE887354C DE 887354 C DE887354 C DE 887354C DE S12492 D DES12492 D DE S12492D DE S0012492 D DES0012492 D DE S0012492D DE 887354 C DE887354 C DE 887354C
- Authority
- DE
- Germany
- Prior art keywords
- arrangement
- surface hardening
- inductive heating
- toothed wheels
- gear
- 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 3
- 230000001939 inductive effect Effects 0.000 title claims 2
- 238000000137 annealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/40—Establishing desired heat distribution, e.g. to heat particular parts of workpieces
- H05B6/405—Establishing desired heat distribution, e.g. to heat particular parts of workpieces for heating gear-wheels
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Heat Treatment Of Articles (AREA)
- Gears, Cams (AREA)
Description
Zur Oberflächenhärtung von Zahnrädern ..ist es bekannt, das Zahnrad auf induktivem Wege zu erwärmen und hierauf ,abzuschrecken. Zu diesem Zweck hat man Glühübertrager verwendet, die eine Primärspule ,besitzen und deren Sekundärteil aus einem .geschlitzten Hohlzylinder und einer geschlitzten Scheibe besteht, .die eine Innenverzahnung besitzt, in welche das zu härtende Zahnrad eingesetzt wird. Hierbei zeigt sich der Übelstand, daß der Kopf *des Zahnrades stärker eingehärtet wird als der Zahngrund. Umthesen Übelstand zu vermeiden, wird gemäß der Erfindung td,ie verzahnte Scheibe mit radialen, nicht durchgehenden Schlitzen am Zahnkopf der Scheilbe versehen. Dies bietet den Vorteil, daß die Stromdichte im Zahngrund des Zahnrades gegenüber Scheiden ohne solche Radialschlitze erhöht wird. Damit wird die Erwärmung am Zahngrund verstärkt, was wiederum bedingt, @daß die gehärtete Oberfläche ungefähr überall, d. b. am Zahnkopf, an .den Flanken und am Zahngrund, die gleiche Stärke besitzt. Zweckmäßig ist es noch, um dieses Ziel zu erreichen, den Luftspalt zwischen Scheibe und Zahnrad so zu wählen, daß er am Kopf des Zahnrades größer ist als am Zahngrund des Zahnrades.For the surface hardening of gearwheels .. it is known to use the gearwheel to heat up inductively and then to deter. To this end has glow transmitters are used that have a primary coil and its secondary part consists of a. slotted hollow cylinder and a slotted disc, .the has internal teeth into which the gear to be hardened is used. This shows the disadvantage that the head * of the gear is more hardened is called the root of the tooth. In order to avoid theses objection, according to the invention td, ie toothed washer with radial, non-continuous slots at the tooth tip the wedge provided. This has the advantage that the current density in the tooth base of the gear is increased compared to sheaths without such radial slots. So that will the heating at the tooth base intensifies, which in turn means @ that the hardened surface roughly everywhere, d. b. on the tooth tip, on the flanks and on the tooth base, the same Has strength. In order to achieve this goal, it is still useful to use the air gap choose between disc and gear so that it is larger at the head of the gear than at the tooth base of the gear.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.
Fig. r zeigt Aden Gliibübertrager im Schnitt, Fig. 2 in Ansicht.Fig. R shows Aden Gliibtransfer in section, Fig. 2 in view.
Der Glühübertrager r besteht aus der Spule 2, dem Zylinder 3, der Scheibe 4, die eine Innenverzahnung trägt. Scheibe und Zylinder besitzen einen radialen durchgehenden Schlitz 5. Mit 6 ist das Zahnrad bezeichnet. Gemäß Aer Erfinidung sind in der Scheibe radiale, nicht durchgehende Schlitze 7 am Zahnkopf der Scheibe vorgesehen. Dadurch wird ein solcher Stromlauf erzwungen, däß die Stromdichte am Zahngrund des Zahnrades ungefähr gleich der Stromdichte am Kopf des Zahnrades wird, so (daß de zu härtende Oberfläche längs der Kontur die gleiche Stärke besitzt.The glow transformer r consists of the coil 2, the cylinder 3, the Washer 4, which has internal teeth. Disc and cylinder have a radial one continuous slot 5. With 6 the gear is referred to. According to Aer invention are radial, non-continuous slots 7 at the tooth tip of the disk in the disk intended. As a result, such a current flow is forced, that the current density on The tooth base of the gear is approximately equal to the current density at the head of the gear, so (that the surface to be hardened has the same strength along the contour.
Besonders zweckmäßig ist es, Frequenz und Leistung so zu wählen, -daß,die Glühzeit o,6 Sekunden nicht übersteigt, damit die Eindringt@efe der Härtung nicht zu groß wird.It is particularly useful to choose the frequency and power so that the Annealing time does not exceed 0.6 seconds so that the hardening does not penetrate gets too big.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES12492D DE887354C (en) | 1944-10-18 | 1944-10-18 | Arrangement for inductive heating of toothed wheels for the purpose of surface hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES12492D DE887354C (en) | 1944-10-18 | 1944-10-18 | Arrangement for inductive heating of toothed wheels for the purpose of surface hardening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE887354C true DE887354C (en) | 1953-08-24 |
Family
ID=7474012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES12492D Expired DE887354C (en) | 1944-10-18 | 1944-10-18 | Arrangement for inductive heating of toothed wheels for the purpose of surface hardening |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE887354C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003779B (en) * | 1954-07-03 | 1957-03-07 | Zahnradfabrik Friedrichshafen | High strength gears and their manufacturing process |
-
1944
- 1944-10-18 DE DES12492D patent/DE887354C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003779B (en) * | 1954-07-03 | 1957-03-07 | Zahnradfabrik Friedrichshafen | High strength gears and their manufacturing process |
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