SU624683A1 - Method of apparatus for straightening articles of the turbine blade type - Google Patents

Description

There is a known method of straightening turbine and compressor blades, which means that the billet is installed in sectional locks fixing it over certain sections and loaded with a constant load, which ensures plastic deformation of the billet (1).

In order to improve the quality of the straightening, the billet is heated during the application of a constant load in cross sections that lie between the cross sections fixed in the cradle to a temperature that ensures the superplastic state of the metal of the billet.

Heating is carried out sequentially, starting from a larger cross-section and ending with a smaller area of sowing, after which the billet is cooled to a temperature equal to 0.6, which ensures the superplastic state of the billet metal.

The disadvantages of the existing method are the necessity of providing harsh temperature-speed conditions for the treatment of blades under which a superplastic state takes place. Sequential holding

heating stamping, starting from a larger cross-section and ending with a smaller cross-section, reduces productivity. The need to cool the workpiece to a temperature of 0.6

from temperature, providing a superplastic state of the metal, necessitates the presence of a special installation.

A device for stamping parts containing a punch and a die 2 is known.

However, it does not warp parts at the same time as electro-stroke heating.

The aim of the invention is to improve the quality of the part and ensure its

electric contact heating during deformation.

This is achieved by the fact that. High temperature heat treatment, such as quenching or annealing, is performed before tfukka, and after editing, the part is cooled with the same speed as during thermal processing. In this case, the heating of the part is performed by electrocontact

method.

Claims (2)

The device for carrying out the atrocious method is equipped with the installation of electric contact heating, and the punch and mattress are made of electrical insulating heat-resistant material, for example, silymanite with the addition of up to 25% low-grade refractory clay. FIG. 1 shows the device, pryudolny incision; in fig. 2 - the same, top view. A turbine blade 1, made, for example, from an alloy of VT9, is annealed at 950-flO ° C with the content of heat when heated for one hour. Further, it is installed in a cold state with base surfaces in clips 2 and 3 along the lock and clamped 4 and 5 along the upper edge of the vapor. Terminals 3 and 5 are at the same time electrical contacts, for which they are made of a conductive element and terminals µ 6 and 7 are connected to the power supply. Teach that the profile of the pen blade can have different twist clamps 5 and 4 set on the plate using the (X) 1st holder 8. The rotation angles of the holder 8 should be commensurate with the twist angle of the feather profile. The blade is mounted on the profile plate 1, the matrix 9 that is vain with the geometry of the pen, which must have either electrical insulation cyogag coating on the contact surface or be made entirely of such material. From above, the fluff of the pen is influenced by the fluffy. Heng 10 is similar to the matrix. . An electric current is passed through a blade in the electrocontact clamps of the blade, which heats the part up to the plastic part. The hot shoulder blade is affected by the force of a RE punch that fits the geometry of the feather profile with one side to the other; and on the other - to the surface of matrip. This makes it possible to eliminate the box that was on the blade. After heating and straightening, the blade is cooled to room temperature in the core and matripe, clamped with force Py. After cooling of the blade to the compressed temperature, the effect of the force of the punch is reduced and the blade is removed from the tool. The material for the punch and the matrix can serve as silimanite with the addition of up to 25% refractory clay which does not agglomerate. It does not conduct electrical current, its tensile strength reaches 620 kg / cm, and it can withstand heating up to 1500 ° C. Formula 1. A method for editing parts such as turbine blades, including the operation of heating the part while simultaneously deforming it, So that, in order to improve the quality, prior to straightening, temperature-temperature heat treatment is performed, and after straightening, the part is cooled at the same rate as during heat treatment. 2. Method pop. 1, characterized in that the heating of the part is carried out by the electrocontact method. 3. A device for carrying out the method of P1T. and 2, containing a punch and a die, so that it is equipped with the installation of electrocontact heating, and the poisop and the matrix are made of electrically insulating heat-resistant material. Sources of information taken into account during the examination: 1. USSR author's certificate No. 428818, cl. 21 D 3/16, 1974. 2. Romanovsky V.P. Handbook of cold stamping. L., Mechanical Engineering. 1971 0g / tzk R eight