PL79989B1 - - Google Patents

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Publication number
PL79989B1
PL79989B1 PL16674573A PL16674573A PL79989B1 PL 79989 B1 PL79989 B1 PL 79989B1 PL 16674573 A PL16674573 A PL 16674573A PL 16674573 A PL16674573 A PL 16674573A PL 79989 B1 PL79989 B1 PL 79989B1
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PL
Poland
Prior art keywords
inductor
inductors
current
filter
frequencies
Prior art date
Application number
PL16674573A
Other languages
Polish (pl)
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Priority to PL16674573A priority Critical patent/PL79989B1/pl
Publication of PL79989B1 publication Critical patent/PL79989B1/pl

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • General Induction Heating (AREA)

Description

Urzadzenie do indukcyjnego hartowania walców dwoma czestotliwosciami Przedmiotem wynalazku jest urzadzenie do hartowania walców dwoma czestotliwosciami.Dotychczas jest stosowane nagrzewanie przy pomocy jednego wzbudnika, ewentualnie^przy pomocy dwóch wzbudników zasilanych ze zródel pradu o róznych czestotliwosciach pracujacych niejednoczesnie. Proces harto¬ wania na przyklad walca polegal na kilkukrotych wstepnych podgrzewach oraz wlasciwym nagrzewaniu i studze¬ niu woda walca. Przy tym sposobie hartowania czas nagrzewania jest stosunkowo dlugi, grubosc warstwy zahar¬ towanej jest zbyt mala, aduzy gradient twardosci powoduje powstanie pekniec na powierzchni roboczej walca.Indukcyjne hartowanie dwoma czestotliwosciami daje zwiekszenie trwalosci walców dzieki uzyskaniu grubszej warstwy zahartowanej oraz zmniejszeniu gradientu twardosci.Urzadzenie do indukcyjnego hartowania walców dwoma czestotliwosciami wedlug wynalazku posiada dwa zbudniki zasilane ze zródel pradu o róznych czestotliwosciach. Wzbudniki umieszczone jeden md drugim, zamk¬ niete we wspólnej obudowie, wyposazone sa w jeden kolektor doprowadzajacy wode d# feh dilodzenia. Pod wzbudnikami umieszczony jest natryskiwacz wody chlodzacej walec. Podczas pracy wzbudniki przesuwaja sie wzdluz osi, znajdujacego sie wewnatrz nich walca, w kierunku od dolu ku górze. Górny wzbudnik zasilany jest ze zródla pradu o czestotliwosci niskiej, a dolny ze zródla o czestotliwosci wysokiej lub sredniej-.. Podczas jednoczesnej pracy sprzezenie magnetyczne wzbudników wywoluje w obwodach zasilajacych Indukowanie sie pradów o obcych czestotliwosciach. W obwodzie zasilajacym jeden wzbudnik indukuj »¦ pracy drugiego wzbudnika. Wtóry zasilajace laczace zródla zasilania ze wzbudnikami wfamme sa filtry elimi¬ nujace szkodliwe zjawisko sprzezen magnetycznych. Wtór zasilajacy wzbudnik oczestotliwosci wysokiej lub sredniej wlaczony jest szeregowo filtr skradajacy sie z dlawika oraz baterii kondensatorów polaczonych równo¬ legle i dostrojony do rezonansu na czestotliwosc pradu drugiego wzbudnika. W tor zasilajacy wzbudnik o czesto¬ tliwosci niskiej wlaczony jest szeregowo dlawik.Przedmiot wynalazku przedstawiono w przykladzie wykonania na rysunku, na którym pokazano schemat urzadzenia. Walec jeden 1 nagrzewany jest przy pomocy dwóch wzbudników 2, 3 zamknietych we wspólnej obudowie 4 i wyposazonych w jeden kolektor 5 doprowadzajacy wode do ich chlodzenia oraz natryskiwacz 13 wody chlodzacej walec 1. Podczas pracy wzbudniki przesuwaja sie wzdluz osi walca w kierunku od dolu ku2 79 989 górze. Górny wzbudnik zasilany jest ze zródla pradu 7 o czestotliwosci niskiej lub sredniej, a dolny ze zródla 6 o czestotliwosci wysokiej. Podczas jednoczesnej pracy wzbudników wystepuje pomiedzy nimi sprzezenie magne¬ tyczne. Wywoluje to w obwodzie zasilajacym jeden ze wzbudników indukowanie sie pradu o czestotliwosci, na jakiej pracuje wzbudnik drugi. W tory zasilajace, laczace zródla zasilania 6, 7 ze wzbudnikami 2, 3 wlaczone sa filtry 8, 9 eliminujace szkodliwe zjawisko sprzezen magnetycznych. W szereg toru zasilajacego wzbudnik 3 wlaczony jest filtr 8 skladajacy sie z baterii kondensatorów 10 oraz dlawika 11 polaczonych równolegle i do¬ strojonych do rezonansu pradów na czestotliwosc pradu zasilajacego wzbudnik 2. Wtór zasilajacy wzbudnik 2 wlaczony jest szeregowo dlawik 12. Dzieki wprowadzeniu filtrów 8, 9 wzbudniki 2, 3 moga byc jednoczesnie zasilane ze zródel 7, 6. PL The device for inductive quenching of rolls with two frequencies. The subject of the invention is a device for quenching rolls with two frequencies. So far, heating is used with one inductor, or with two inductors supplied from power sources with different frequencies, working simultaneously. The quenching process of the roll, for example, consisted of several pre-heating times and proper heating and cooling of the roll water. With this method of quenching, the heating time is relatively long, the thickness of the hardened layer is too small, and the hardness gradient causes cracks on the working surface of the roll. Induction quenching with two frequencies increases the durability of the rolls by obtaining a thicker hardened layer and reducing the hardness gradient. According to the invention, the induction hardening of rolls with two frequencies has two structures supplied from current sources of different frequencies. The inductors placed one after the other, closed in a common housing, are equipped with one collector for the supply of water for cooling. There is a water sprayer that cools the roller under the inductors. During operation, the inductors move along the axis of the cylinder inside them, from bottom to top. The upper inductor is powered from a low-frequency power source, and the lower one from a high-frequency or medium-frequency source. During simultaneous operation, the magnetic coupling of the inductors causes induction of currents with foreign frequencies in the power supply circuits. In the supply circuit, one inductor induces the operation of the other inductor. The power supplies connecting the power sources with the inductors are filters that eliminate the harmful phenomenon of magnetic couplings. The secondary power supply to the high or medium frequency inductor is connected in series with a filter that creeps up from the choke and a bank of capacitors connected in parallel and tuned to resonate to the frequency of the second inductor. A choke is connected in series in the feed path of the low-frequency inductor. The subject of the invention is illustrated in the example of the embodiment in the drawing, which shows the diagram of the device. One roller 1 is heated by two inductors 2, 3 closed in a common casing 4 and equipped with one collector 5 supplying water to cool them and a sprayer 13 of water cooling the roller 1. During operation, the inductors move along the roller axis in the direction from the bottom ku2 79 989 up. The upper inductor is powered from a current source 7 of low or medium frequency, and the lower one from a source 6 of high frequency. During the simultaneous operation of the inductors, there is a magnetic connection between them. This causes the induction of a current in the circuit supplying one of the inductors at the frequency of the other inductor. The power lines, connecting the power sources 6, 7 with the inductors 2, 3, are equipped with filters 8, 9 which eliminate the harmful phenomenon of magnetic couplings. In the line supplying the inductor 3, a filter 8 is connected, consisting of a bank of capacitors 10 and a choke 11 connected in parallel and tuned to the resonance of the currents for the frequency of the current supplying the inductor 2. The second power supplying the inductor 2 is connected in series with the choke 12. 9 inductors 2, 3 can be simultaneously powered from sources 7, 6. PL

Claims (4)

Zastrzezenia patentowe 1. Urzadzenie do indukcyjnego hartowania walców dwoma czestotliwosciami, znamienne tym, ze posiada dwa ruchome przesuwajace sie wzbudniki (2, 3) wzdluz osi umieszczonego wewnatrz nich walca (1), zasilane z oddzielnych zródel pradu (6, 7) o róznych czestotliwosciach poprzez tory wielkopradowe, w które wlaczone sa filtry (8, 9) kompensujace wplyw sprzezen magnetycznych.Claims 1. Device for induction hardening of rolls with two frequencies, characterized by the fact that it has two moving inductors (2, 3) along the axis of the cylinder (1) located inside them, supplied from separate sources of current (6, 7) with different frequencies through high-speed tracks, in which filters (8, 9) are connected to compensate for the influence of magnetic coils. 2. Urzadzenie wedlug zastrz. 1, znamienne tym, ze wzbudniki (2, 3) posiadaja wspólna obudowe (4), jeden kolektor (5) doprowadzajacy do nich wode chlodzaca oraz umieszczony pod wzbudnikiem (3) natryskiwacz (13) wody chlodzacej walec (1).2. Device according to claim A device according to claim 1, characterized in that the inductors (2, 3) have a common housing (4), one collector (5) supplying them with cooling water and a sprayer (13) for cooling the cylinder (1) located under the inductor (3). 3. Urzadzenie wedlug zastrz. 1, znamienne tym, ze wzbudnik (2) zasilany jest ze zródla pradu (7) o czesto¬ tliwosci niskiej, a wzbudnik (3) ze zródla pradu (6) o czestotliwosci wysokiej lub sredniej3. Device according to claim A method according to claim 1, characterized in that the inductor (2) is supplied from a source of current (7) of low frequency, and the inductor (3) from a source of current (6) of high or medium frequency 4. Urzadzenie wedlug zastrz. 1, znamienne tym, ze filtry (8 i 9) wlaczone sa w szereg torów wielkoprado- wych, przy czym filtr (8) wtórze zasilajacym wzbudnik (3) ma baterie kondensatorów (10) i dlawik (11) polaczone ze soba równolegle, a filtr (9) w torze zasilajacym wzbudnik (2) ma dlawik (12). A I r \ 5 , aT"1 1 ad L_^k^ Prac. Poligraf. UP PRL naklad 120+18 Cena 10 zl PL4. Device according to claim 3. The filter according to claim 1, characterized in that the filters (8 and 9) are connected to a series of high-flux paths, the filter (8) on the power supply of the inductor (3) having capacitor banks (10) and a choke (11) connected in parallel, and the filter (9) in the line feeding the inductor (2) has a throttle (12). A I r \ 5, aT "1 1 ad L_ ^ k ^ Work. Printing. UP PRL circulation 120 + 18 Price PLN 10 PL
PL16674573A 1973-11-23 1973-11-23 PL79989B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16674573A PL79989B1 (en) 1973-11-23 1973-11-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL16674573A PL79989B1 (en) 1973-11-23 1973-11-23

Publications (1)

Publication Number Publication Date
PL79989B1 true PL79989B1 (en) 1975-08-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PL16674573A PL79989B1 (en) 1973-11-23 1973-11-23

Country Status (1)

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PL (1) PL79989B1 (en)

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