SU1207608A1 - Arrangement for electric upsetting - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of core-type products with thickenings.

The aim of the invention is to expand the technological capabilities of the process by providing machining on electric heading machines with blanks mainly from materials with low thermal activity and with a small area of the initial section.

The drawing schematically shows the proposed device.

The device contains a thrust 1 and a radial 2 electrodes connected electrically with a heating transformer 3, a cooled container 4 with an insert pressed into it, consisting of two parts made of materials with different thermal activity.

Moreover, part 5 of the insert, made of a material with lower thermal activity, for example, from mineral ceramics 22ХС, was installed on the side of the radial electrode 2, and another part b of the insert with greater thermal activity, for example, from the high-temperature alloy FS .

The device works in the following way.

At the initial stage, the process is carried out according to the scheme: the workpiece 7, clamped with some force P in the radial electrode 2, is supplied by the upstream plunger (not shown) from right to left with a pre-set value of force P before contact with the stop electrode 1 located at a distance of 1 -3 mm from the radial. Next, the heating transformer 3 is heated in, heating the precipitated part of the workpiece between the electrodes to the forging temperature, and the metal begins to deform under the influence of Editor A. Gulko

Compiled by L „Kommel

Tehred A. Babinets Proofreader G, Reshetnik

Order 121/11 Circulation 656 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch P1P Patent, Uzhgorod, Proektna St., 4

207608

By the force of force P. At the same time, the end electrode 1 is retracted at a predetermined speed in order to free up the space for thickening. 5 The flow of metal in the zone of plastic deformation of the workpiece is limited by the mineral-ceramic part.

5 inserts ensuring minimal heat loss and constant heat balance,

In the area of the metal part 6 of the insert, the transverse dimensions of the bulges do not change, therefore, the role of the insert is to prevent loss of stability and to increase the removal of heat accumulated in the deformed area to the cooling system. As a result of the presence of contact between the planted thickening

20 workpiece 7 and the metal part

6Inserts redistribute the heating current between them. This ensures the stability of the load electrical resistance and

25 electric current I in the heating zone Id as a result, the set temperature. In addition, a decrease in the current density B of the planted part of the workpiece leads to a decrease in the heat30 of the emission and to prevent its overheating.

Thus, the proposed device (as compared to the known one, which has an insert of one 35 materials) provides stable process parameters during the entire period of electro-elevation, regardless of the relative length and degree of thickening of workpieces with a small output 40 of the cross section of materials with predominantly low heat your activity as a result of its insertion from materials with different thermal activities and

4: 5 electrical conductivity.

Claims (2)

1. DEVICE FOR ELECTRIC SITUATION, comprising a radial and persistent electrodes with an associated electrically heating transformer, means for applying to the workpiece a landing force, a container for landing with an insert and a cooling device installed between the said electrodes, characterized in that, in order to expand technological capabilities by providing electric upsetting of workpieces with a small cross-sectional area mainly from materials with low thermal activity, the insert is formed by two parts parts, one of which is made of a material with low thermal activity, and the other of a material with high thermal activity, while the first part of the insert is mounted on the side of the radial electrode. 2. The device according to claim 1, characterized in that the part of the insert with low thermal activity is made of high alumina ceramics, and the part of the insert with high thermal activity is made of heat resistant nickel-based alloys. R S * SU „„ 1207608