SU849560A1

SU849560A1 - Induction heater for heating annular shape articles

Info

Publication number: SU849560A1
Application number: SU792823432A
Authority: SU
Inventors: Анатолий Иванович Куров; Павел Васильевич Яловенко; Анатолий Иванович Безрукавый; Георгий Арсеньевич Калениченко; Валерий Георгиевич Жогленко; Лев Абрамович Шлиомензон; Александр Михайлович Рачковский; Александр Лукич Марфин
Original assignee: Украинский Заочный Политехническийинститут
Priority date: 1979-10-02
Filing date: 1979-10-02
Publication date: 1981-07-23

Description

Изобретение относится к индукционным нагревательным устройствам, работающим на токах промышленной частоты, и предназначено для нагрева крупных деталей (шестерен большого диаметра, маховиков, эксцентриков, шатунов, крупных подшипни- ⁵ков, колес железнодорожного .транспорта) при тепловой сборке.The invention relates to induction heating devices operating at industrial frequency currents, and is intended for heating large parts (large diameter gears, flywheels, eccentrics, connecting rods, large bearings ⁵ , wheels of railway vehicles) during thermal assembly.

Известно индукционное устройство для нагрева деталей, содержащее индуктор в магнитную цепь, замыкаемую полюсными наконечниками на деталь [1].Known induction device for heating parts, containing an inductor in a magnetic circuit, closed by pole pieces on the part [1].

Однако в такой конструкции магнитный поток концентрируется в отдельных зонах · торцевых поверхностей, что приводит к местным перегревам и прижогам, т.е. к локальному изменению физико-механических свойств материала нагреваемой детали.However, in this design, the magnetic flux is concentrated in separate zones of the end surfaces, which leads to local overheating and burning, i.e. to a local change in the physico-mechanical properties of the material of the heated part.

Наиболее близким к предлагаемому по конструктивным признакам является индукционный . . ^нагреватель для нагрева деталей кольцевой формы, содержащий разъемный магнитопровод с индукционной обмот2 кой и полюсными наконечниками, установленными в месте разьема на одной ссиЦ2], Однако известное устройство не дает возможности равномерного нагрева по всему сечению детали,.а также ограничивает ассортимент нагреваемых деталей.Closest to the proposed structural features is induction. . ^ a heater for heating ring-shaped parts, containing a detachable magnetic circuit with induction winding and pole lugs installed in place of the connector on one ssiC2]. However, the known device does not allow uniform heating over the entire section of the part, and also limits the range of heated parts.

Цель изобретения - повышение равномерности нагрева.The purpose of the invention is to increase the uniformity of heating.

Поставленная цель достигается тем, что в предлагаемом устройстве каждый полюсный наконечник выполнен в виде шихтованного элемента с отверстием по указанной оси, в котором установлен дополнительный магнитопровод, предназначенный для размещения нагреваемой детали, причем полюсные наконечники и дополнительный магкитопровод снабжены механизмами перемещения их по указанной оси.This goal is achieved by the fact that in the proposed device, each pole piece is made in the form of a lined element with a hole on the specified axis, in which an additional magnetic circuit is installed, designed to accommodate the heated part, and the pole pieces and the additional magnetic circuit are equipped with mechanisms for moving them along the specified axis.

. На чертеже показано устройство, общий вид. · _? . The drawing shows a device, General view. _?

Индукционное устройство содержит индуктор 1 и магнитную цепь, которая состоит из С-образного магнитопровода 2, верхнего полюсного наконечника 3, ниж него полюсного наконечника 4, внутри которых находится подвижный магнитопроводThe induction device comprises an inductor 1 and a magnetic circuit, which consists of a C-shaped magnetic circuit 2, an upper pole piece 3, a lower pole piece 4, inside which there is a movable magnetic circuit

5. Элементы магнитной цепи набраны из прямоугольных полос трансформаторной стали,, стянуты заклепками и обработаны · по сопрягаемым поверхностям.5. The elements of the magnetic circuit are drawn from rectangular strips of transformer steel, pulled together with rivets and machined on mating surfaces.

Для нагрева деталей различных форм и размеров полюсные наконечники 3 и 4 и. подвижный магнитопровод 5 имеют соответственно приводы .для перемещения 6,7 и 8.For heating parts of various shapes and sizes, the pole pieces 3 and 4 and. the movable magnetic circuit 5 have drives, respectively. for movement of 6.7 and 8.

Нагреваемая деталь 9 подается в устройство, затем с помощью привода 6 верхний полюсный наконечник 3 устанавливается над деталью 9 с зазором порядкаThe heated part 9 is fed into the device, then, using the drive 6, the upper pole piece 3 is mounted above the part 9 with a clearance of the order

3-5 мм. При зазоре менее 3 мм увеличивается неравномерность магнитного потока. При зазоре более 5 мм уменьшается величина магнитного потока. Аналогично производится установка нижнего полюсного наконечника 4.3-5 mm. With a gap of less than 3 mm, the irregularity of the magnetic flux increases. With a gap of more than 5 mm, the magnetic flux decreases. Similarly, the installation of the lower pole tip 4.

При помбщи привода 8 подвижной магнитопровод 5, установленный внутри полюсных наконечников 3 и 4, замыкает всю магнитную цепь. При включении устройства через деталь проходит магнитный поток , обеспечивающий ее нагрев.With drive 8, the movable magnetic circuit 5, mounted inside the pole pieces 3 and 4, closes the entire magnetic circuit. When the device is turned on, a magnetic flux passes through the part, ensuring its heating.

Результаты испытаний промышленного образца показали повышение качества наг849560 |рева и, как следствие, повышение качест ва тепловой сборки.The test results of the industrial design showed an increase in the quality of heating and, as a result, an increase in the quality of thermal assembly.

Claims

Isobregnenne ognosngs to induction heating devices operating at industrial frequency currents, and is intended for heating large parts (large diamegra gears, flywheels, eccentrics, connecting rods, large bearings, railway wheels) during thermal assembly. An induction device for heating parts is known, which contains an inductor into a magnetic circuit, closed with pole tips per part flj. However, in such a design, the magnetic flux is concentrated in separate zones of the end surface of the heel, which leads to local overheating and burning. to a local change in the physicomechanical properties of the material of the heated part. Induction (... the heater for heating the details of the ring form, which contains an induction winding and pole pieces, is installed) is closest to that proposed by the constructive characteristics. in the place of the plug on one ssi. However, the device does not allow uniform heating throughout the part, and also limits the range of heated parts. The purpose of the invention is to increase the uniformity of heating. This goal is achieved by the fact that in the proposed device each pole tip is made in the form of a laminated element with a hole along a specified axis, in which an additional magnifying conduit is installed to accommodate the heated part, the pole tips and the additional drawing conduit provided with mechanisms for moving them along the specified axis. . The drawing shows the device, a general view. / The induction device contains an inductor 1 and a magnetic circuit, which consists of a C-shaped magnetic circuit 2, an upper pole connector 3, a lower pole tip 4, inside the scoop there is a moving magic arc 5, The magnetic circuit elements are made of rectangular strips of transformer steel chickpeas riveted and machined on mating surfaces. For heating parts of various shapes and sizes, pole pieces 3 and 4 and. The movable magnetic core 5 has, respectively, drives for moving 6.7 and 8. The heating piece 9 is fed into the device, then with the help of the drive 6, the top pole tip 3 is mounted above the piece 9 with a gap of about 3-5 mm. When the gap is less than 3 mm, the irregularity of the magnetic flux increases. With a gap greater than 5 mm, the magnitude of the magnetic flux is reduced. Similarly, the installation of the lower pole nipple 4 is carried out. When the drive 8 is assisted by the moving magnetic core 5, mounted inside the pole pieces 3 and 4, it closes the entire magnetic circuit. When the device is turned on, the Detail passes a magnetic flux ensuring its heating. The test results of an industrial design showed an increase in the quality of heating and, as a result, a higher quality of thermal assembly. Claims of the invention: Induction heater for heating ring shaped parts, comprising a detachable magnetic core with induction winding and pole pieces installed at the connector site on the same axis, characterized in that, in order to improve heating uniformity, each pole tip is made in a laminated element with a hole along a specified axis, in which an additional magnetic core is installed, designed to accommodate a heated part, with pole pieces and an additional magnetic conductor They are equipped with mechanisms for moving them along a specified axis. Sources of information, rrpmiHTbie into account during the examination 1. Author's certificate of the USSR N 200045, cl. H 05 B 5/18, 1967.

2. USSR author's certificate number 488371, cl. H 05 B 5/18, 1972.