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Vsesojuzny Nauchno-issledovatelsky Proektno-konstruktorsky I

Vsesojuzny Nauchno-issledovatelsky Institut Po Stroitelstvu

Viktor Senderovich Lifshits

Vladimir Nikitich Baranov

Oleg Sergeevich Papkov

Georgy Nikolaevich Petrov

Nikolai Makarovich Dergachev

Vladimir Ivanovich Khomenko

Arkady Alexeevich Pevnev

Tamila Iosifovna Osinskaya

Leonid Pavlovich Shklyanov

Nikolai V Podola

Vadim P Krivonos

Boris L Grabchev

Vladimir R Andrianov

Ivan Petrovich Gremyakov

Dmitry Nikiforovich Koltyrev

Ivan Ivanovich Polyansky

Llonid Pavlovich Shklyanov

Alexandr Alexandrovich Sukhanov

Zinaida A Ryskova

Olimpiada Mikhailovna Brjukvina

Vadim Y Khazov

Alexandr Yakovlevich Gerasimenko

Boris S Alexeev

Andrei B Belov

Alexandr Korneevich Taradaiko

Valentin N Bogdanov

Anatoly I Komarchev

Alexandr Mikhailovich Zemchenko

Rifkhat M Shakirov

A machine for continuous flash butt welding comprises control devices for the control of beginning-of-upset operation and upset value, respectively, and such control devices are provided in one unit (a computer). Also provided are a control device for automatically controlling the flashing-off speed and a welding current meter connected to a welding transformer. A sensor connected to the meter detects short-circuit duration in the welding circuit in response to outputs of a welding control enabling signal generator actuated at the final stage of flashing and in the course of upsetting. The inputs of the latter are coupled to the computer and the output is connected to an upset value deviation control circuit. The latter receives inputs from a circuit which detects slippage of the parts in the clamping jaws during welding. The upset value deviation control circuit is further connected to a sensor means for detecting misalignment of a rod of the follow-up slide valve relative to its body.

Machine for continuous flash butt welding

According to the invention, the continuous flash butt-welding machine supplied with power from a mobile diesel-generator power plant comprises a rectifier-charger the input of which is connected to the diesel-generator. The machine has a storage battery provided with a charge-discharge sensing element connected to the rectifier-charger. The machine also has an inverter with a unit for controlling the frequency and amplitude of the voltage at the inverter output. The inverter is connected to welding transformers and to a current transducer. The control unit is connected to the charge-discharge sensing element, the current transducer and a flashing value sensing element. The proposed invention makes it possible to reduce the installed power of the diesel-electric units of mobile power plants and to increase the life of the diesel engines and the thermal efficiency of the welding process.

Continuous flash butt-welding machine

According to the present invention the radial feed mechanism comprises a hydraulic cylinder on the rod of which is rigidly fixed a holder connected with the housing of the radial feed mechanism by springs which ensure the cutting force of the cutting tool. At one end the springs bear against the housing of the radial feed mechanism while at the other end they bear against the holder rotated by a drive mounted on the tool head body and the shaft of said drive is rigidly connected with the housing of the radial feed mechanism. The housing of the radial feed mechanism carries a slide valve whose rod interacts with the profiled surface of a master form rigidly fixed on the tool head body. The holder is provided with rollers for tracing the internal surface of the welded pipe. The advantage of the device according to the present invention resides in that it ensures removal of flesh regardless of its temperature. Besides, the device allows the flash to be removed uniformly around the perimeter of the joint even in case the welded pipes are out-of-round. Further, the device allows to maintain practically constant cutting force during the flash-removing process.

Device for removing internal circular flash

A welding apparatus employing a self-contained pumping accumulator plant hydraulically associated with a hydraulic ram of a moving clamp transfer gear for gripping pipes being welded. The apparatus employs a device for decreasing the pressure in the hydraulic ram and in a pilot valve during flashing and for increasing pressure during upsetting. The apparatus also employs a a low-pressure high-capacity pump with a filter, a relief valve, a nonreturn valve and an unloading slide valve, two high-pressure low-capacity pumps and a device for cutting the pumps and the unloading slide valve in and out. The pumping accumulator plant and the high-pressure pumps communicate with a main oil plant; a hydraulic control of the slide valves of the clamp hydraulic drives is connected to the pumping accumulator plant. The pilot valve is controlled by a welding process program control actuator.

Resistance type flash butt welder

A device for removing external circular fins from pipe joints comprising a base, a hollow rotor with a faceplate mounted in the base, carriages located on the rotor faceplate, a mechanism for radial traverse of the carriages, having a holder rotatably fitted on the rotor, and a drive for the rotor and the mechanism for traversing the carriages. Each of the carriages is provided with a roller adapted to trace over the surface of the pipes being treated, while the mechanism for radial traverse of the carriages is composed of links with one of their ends articulated to the holder and with the other end to slide blocks, each of which is housed in a bore in the respective carriage with the possibility of radial movement therein and is connected to a spring gauged for the cutting force, the other end of which spring thrusts against the bottom of the carriage bore. The drive of the rotor and of the carriage traversing mechanism has two output shafts, of which one is kinematically associated with the rotor, while the other shaft is kinematically associated with the holder, which drive is provided with a mechanism for program control of the difference between the rotational speeds of the shafts.

Device for removing external circular fins from pipe joints

The machine disclosed is provided with a manipulator which aligns and moves pipes in course of welding and incorporates a hollow rod for the movement of the manipulator relatively to the pipe joints. The rod is immovably attached to the body of the manipulator and is provided with a partition subdividing the rod bore into two spaces. One of the spaces is intended to be filled with a working fluid and the other accommodates on the partition a hydraulic system for feeding and controlling both actuators of pipeholding clamps and a means for moving the pipes in the course of welding, the means comprising hydraulic cylinders whose bodies are immovably attached to the body of a movable aligning unit between hydraulic cylinders which are mounted on the unit to actuate the clamps holding fast one of the pipes being welded whereas piston rods of the hydraulic cylinders that move the pipes are immovably attached to the body of the manipulator insulated electrically from an immovable aligning unit. It is expedient to use the machine disclosed for welding bigbore pipes into a continuous pipeline. The layout of said machine provides for quick withdrawal and replacement of hydraulic actuating cylinders without taking apart the welding manipulator. This feature adds to the number of purposes the machine can serve, promotes its serviceability and repairability.

Machine for the resistance butt welding of pipes by fusion

Growing community of inventors

Moscow, Russia

Viktor Senderovich Lifshits