SU632461A1

SU632461A1 - Hot-stamping apparatus

Info

Publication number: SU632461A1
Application number: SU772497394A
Authority: SU
Inventors: Олег Викторович Елисеев; Юрий Сергеевич Махов; Александр Григорьевич Васильев; Валерий Михайлович Белоног; Рихман Рахимович Гафаров
Original assignee: Предприятие П/Я М-5671
Priority date: 1977-06-14
Filing date: 1977-06-14
Publication date: 1978-11-15

Description

1one

Изобретение относитс к области обработки металлов давлением, а именно к устройствам дл гор чей, в частности изотермической , штамповки.The invention relates to the field of metal forming, namely, devices for hot, in particular isothermal, stamping.

Известно устройство дл гор чей штамповки , содержащее верхний и нижний блоки штампа, смонтированные с возможностью осевого неремеш,ени относительно соответствующих им нодштамповых плит, а также закрепленных на ответных поверхност х блоков и подштамповых плит элементов теплоизол ции в виде пластин 1.A device for hot stamping is known, comprising upper and lower punch blocks mounted axially unmixed, relative to their corresponding nodshtampovy plates, and also mounted on the response surfaces of the blocks and podshtampovyh plates of elements of thermal insulation in the form of plates 1.

Цель изобретени - уменьшение потерь тепла и сокращение габаритов элементов теплоизол ции.The purpose of the invention is to reduce heat loss and reduce the dimensions of the elements of thermal insulation.

Дл этого предлагаемое устройство дл гор чей штамповки снабжено сильфонами, установленными по периметру пластин и образующими с ними замкнутые вакуумированные полости, при этом поверхности пластин , закрепленных на блоках штампа, обращенные к подштамповым плитам, имеют излучательную способность меньще излучательной способности ответных поверхностей пластин, закрепленных на подшипниковых плитах.For this, the proposed device for hot stamping is provided with bellows installed along the perimeter of the plates and forming with them closed evacuated cavities, while the surfaces of the plates fixed on the stamp blocks facing the sub-stamp plates have an emissivity lower than the emissivity of the response surfaces of the plates fixed on bearing plates.

На чертеже показана конструкци предлагаемого устройства.The drawing shows the design of the proposed device.

Устройство содержит элементы теплоизол ции - пластины 1, св занные между собой сильфоном 2. Сильфон приварен по контуру пластины аргоно-дуговой сваркой. К одной из пластин приварена трубка 3, служаша дл вакуумировани полости. Трубка 3 через вакуумный вентиль 4 может быть соединена с вакуумным насосом. Предварительное создание невысокого разрежени может быть осуществлено путем сжати пластин 1 с последующим перекрытием вакуумного вентил 4 или вакуумного клапана.The device contains heat insulating elements - plates 1, interconnected by a bellows 2. The bellows is welded along the contour of the plate by argon-arc welding. A tube 3 is welded to one of the plates, serving to evacuate the cavity. The tube 3 through the vacuum valve 4 can be connected to a vacuum pump. Pre-creation of a low vacuum can be accomplished by compressing the plates 1, followed by shutting off the vacuum valve 4 or the vacuum valve.

Внутренние поверхности А и Б имеют разную излучающую и поглощающую способности .The inner surfaces A and B have different radiating and absorbing abilities.

Поверхность А имеет большой коэффициент черноты и поглощает значительно больще тепловых лучей, чем отражает. Така поверхность может быть окислена или покрыта слоем черной сажи.Surface A has a large blackness coefficient and absorbs significantly more heat rays than it reflects. This surface may be oxidized or covered with a layer of black soot.

Противоположна ей внутренн поверхность Б другой пластины обладает значительной излучающей способностью. Подобна поверхность может быть полированной или побеленной.Opposite to it, the inner surface B of another plate has a significant radiating ability. A similar surface can be polished or bleached.

Claims

Total surface emissivity: at a temperature Tg is determined as the ratio of the energy of the radiation emitted to the surface and the energy e of an absolutely black surface at the same temperature gCTsL eKT The proposed device for hot stamping is mounted on a press. The plate 1 of the device with the tube 3 welded to it is fastened to the press plate 5 of the press with bolts. Plate 1 is separated from the substamp plate by a layer 6 of thermal insulation. The other plate of the device is bolted through the heat insulating layer 6 to the heating plate 7 (or stamp), in which the heaters are embedded. When the stamping process is carried out, the bellows 2 is compressed (see the left part of the drawing), the deforming forces are transmitted through the plates 1 to the die plates 5. The duration of the stamping process is small and is 0.1-3.0 seconds. The heating time of the stamp may take several hours and during this time, the contact of the heating plates 7 with the sub-die plates 5 of the press does not occur (see the right part of the drawing). The blocks 8 and 9 of the stamp, associated respectively with the upper and lower heating plates 7, are separated from the sub-stamp plates by the proposed device in the process of heating. In this case, the upper bellows 2 of the device is stretched by means of a height-adjustable stop 10 mounted on the press frame 11 and a plate 12 bolted to the plate. When stamping, the upper sub-plate goes down and the bellows 2 is compressed by atmospheric pressure. The force force during the stamping closes on the frame. Similarly, the proposed device and the bottom of B. But it is squeezed from the die plate 5 when the upper die plate moves upward through the columns 13. The proposed device for hot stamping reduces heat losses while reducing the dimensions of the thermal insulation elements. What is achieved, in particular, is the creation of a vacuum layer between the heating and substamping plates. Claims An apparatus for hot stamping, comprising upper and lower punch blocks, mounted with axial mixing with respect to their respective substamp plates, as well as plates of heat insulating elements in the form of plates fixed on the response surfaces of the blocks and substamp plates, characterized in in order to reduce heat loss and reduce the dimensions of the elements of thermal insulation, it is equipped with bellows installed along the perimeter of the plates and forming with them closed evacuated cavities, with this The surface of the plates mounted on the blocks of the stamp facing the die plates have an emissivity less than the emissivity of the mating surfaces of the plates mounted on the die plates. Sources of information taken into account in the examination: 1. USSR Author's Certificate ОЧо 363544, cl. B 21 J 13/02, 1970.