SU903031A1

SU903031A1 - Friction welding machine clamping apparatus

Info

Publication number: SU903031A1
Application number: SU802947822A
Authority: SU
Inventors: Юрий Павлович Борисенко; Владимир Степанович Шевченко; Игорь Владимирович Малинкин; Василий Алексеевич Сахарнов; Владимир Иванович Тишура
Original assignee: Киевский Ордена Ленина Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции
Priority date: 1980-06-30
Filing date: 1980-06-30
Publication date: 1982-02-07

Description

(5) ЗАЖИМНОЕ УрТРОЙСТВО МАШИНЫ ДЛЯ СВАРКИ ТРЕНИЕМ(5) CLAMP FOR WELDING FIRMING MACHINE

I I

Изобретение относитс к сварке трением и может быть использовано в машинах дл сварки трением преимущественно дисков с валами и литых колес газовых турбин с валами.The invention relates to friction welding and can be used in friction welding machines, mainly discs with shafts and cast wheels of gas turbines with shafts.

Известны зажимные устройства дл зажати деталей различной формы поперечного сечени .Clamping devices are known for clamping parts of various cross-sectional shapes.

Известно, в частности, устройство дл зажати деталей из пруткового проката, состо щее из зажимного патрона, сердечника электромагнитной вставки, установленной между сердечником электромагнитной катушки и зажимным патроном О .It is known, in particular, a device for clamping bar-shaped parts consisting of a clamping chuck, a core of an electromagnetic insert, installed between the core of an electromagnetic coil and a clamping chuck O.

Однако такое устройство не обеспечивает достаточную точность зажати заготовок, типа диска или колец из-за незначительной их толщины.However, such a device does not provide sufficient accuracy for clamping blanks, such as a disk or rings due to their insignificant thickness.

Кроме того, расположение в одну линию зажимного патрона и упора увеличивает габариты машины.In addition, the alignment of the chuck and the stop increases the overall dimensions of the machine.

Наиболее близким к предложенному устройству вл етс зажимное устроиство машины дл сварки трением, содержащее цангу с лепестками, имею щую цилиндрическую рабочую поверхHoctb 2 .Closest to the proposed device is a friction welding machine clamping device comprising a lobe collet having a cylindrical working surface Hoctb 2.

Однако деформируемый упор в таком устройстве выполн ет пиш функцию ограничени движе и при вт гивании кольцевых деталей грибковым захватом в патрон и не может воспринимать значительные усили осадки.В However, the deformable abutment in such a device performs the writing function of limiting the movement and when the ring parts are drawn in by a fungal capture in the cartridge and cannot perceive significant upsetting forces.

10 зажимном устройстве без упора дл надежной фиксации заготовки к цилиндрической ее поверхности необходимо приложить усилие, котороев. два раза больше, чём в таком же устройстве 10 clamping device without emphasis for reliable fixation of the workpiece to its cylindrical surface, it is necessary to apply a force that. two times more than in the same device

Claims

15 with emphasis. Therefore, when the gas turbine wheel is clamped in the device, its lateral surface, which is formed by thin petals, will be crushed. In addition, a collet clamping device with a cylindrical base surface allows only ring members with a cylindrical base surface to be clamped. The limitation of the base surface of the part leads to an increase in the scrap rate due to misalignments when basing. In order to obtain a high-quality welded product, the end face of the cast wheel facing the welded shaft during welding should be taken as a base when the wheel is mounted in a clamping device. This is due to the fact that it is this surface that is processed with the greatest precision. The goal is achieved by the fact that in a clamping device of a friction welding machine containing a lobe collet, having a cylindrical working angle, each lobe of the collet in the working part is provided with a shoulder with a base surface perpendicular to the axis of the device and facing inside the collet and between the lobes the collet is hingedly attached to the collet of the collet; FIG. t depicts a general view of the clamping device; in fig. 2 section aa of FIG. The device comprises a housing 1, a two lobe collet 2, connected in the tail section by means of an axis 3 with a screw support 4, on which a strut nut 5 is screwed with a handle 6. This nut with its projection B is mated to a monolithic rod of a turbine wheel 7 clamped in the clamping device. The figures also show a rotating workpiece 8, clamped by the collet 9 in the headstock tO of the friction welding machine. The device works as follows. The wheel of the turbine 7 is inserted into the collet 2 and the support is supplied with the screwed nut 5. By turning the handle 6 around the axis of the device, the wheel of the turbine 7 is clamped to the collet B of the collet 2 and its positioning over the machined surface. The clamping of the stationary workpiece by the collet 2 is carried out by moving the latter relative to the body 1 under the action of a decompression force. The nut .5 is twisted by turning the handle 6 onto the support j and the last turning around the axis 3 is pulled out of the cavity of the collet 2. The welded product is removed from the clamping device. The application of the proposed device will improve the accuracy of manufacture of welded products by improving the base conditions and on the Lychee colts of collet lobes. In addition, the use of this device makes it possible to reduce the reject rate due to the absence of distortions when basing, reducing efforts to clamp the wheels of the turbine and, due to the presence of an emphasis in the device. The use of a pivot bearing allows the machine to be reduced in size by using the space between the collet tabs. Claims A friction welding machine clamping device comprising a lobe collet having a cylindrical surface, so that, in order to improve the accuracy of the welded product, each lobe of the collet in the working section is provided with a collar with a base surface perpendicular to A screw bearing is hinged to the shaft of the device and facing the inside of the collet, and between the petals of the collet is hinged to the collet of the collet. Sources of information taken into account in the examination of t. USSR author's certificate 582080, cl. In 23 K 19/02, 1976.

2. USSR author's certificate number 366032, cl. B 23 B 31/20, 1971 (prototype).