The ELU-20RZ unit is designed for precision electron beam welding of circular, ring, and straight seams on products made of high-strength steels and alloys based on nickel, titanium, niobium, molybdenum, copper, aluminum, as well as dissimilar metal materials up to 100 mm thick.

The main units of the ELU-20RZ electron beam welding unit:
- Vacuum chamber,
- Machine tool complex,
- Power complex,
- Vacuum system,
- Pneumatic system,
- Water cooling system,
- Electrical wiring,
- Control system.

Vacuum chamber.
The vacuum chamber is designed to create a required vacuum inside, accommodate the machine tool complex and technological equipment, and provide protection from X-ray radiation resulting from the deceleration of accelerated electrons.
The chamber has seven portholes for visual observation of the welding process and adjustment of the electron beam on the joint: six on the front side of the chamber and one on the left side.

Machine complex.
The machine complex of the ELU-20RZ plant includes:
- electron beam gun manipulator;
- product manipulator;
- tailstock.
The machine complex ensures the execution of welding, installation and transfer, which are carried out in accordance with the geometric shape of the welds. Due to design solutions the accuracy of positioning the actuators during linear movements is 0.05 mm.
The gun manipulator ensures its movement in the longitudinal, transverse, vertical directions (axes X, Y and Z) and rotation in the planes XZ and YZ (axes C and D).
The gun manipulator consists of the following main units:
- platform;
- column;
- crossbeam;
- crossbeam rotation mechanisms;
- gun.
The platform is a welded spatial frame made of stainless steel that rests on rollers on guides and is fixed to the sliding cover using hinged brackets.
The product manipulator carriage has the ability to adjust the longitudinal movement using a ball screw (axis B).
The product manipulator consists of:
- welded body;
- spindle;
- faceplate with six T-shaped slots for fastening the workpiece.
The product manipulator provides fastening, positioning and rotation (A-axis) of cylindrical, conical and other volumetric products with equipment weighing up to 2500 kg.
The ELU-20RZ machine complex provides movement along 7 axes: longitudinal, transverse and vertical movement of the electron gun (axes X, Y and Z), rotation of the welding head in the XZ plane (axis C) and in the YZ plane (axis D), rotation of the faceplate with the product (axis A), movement of the product manipulator in the longitudinal direction (axis B), provides interconnected movement of the electron beam gun and the product along closed and open contours in accordance with the specified control program.

Power complex.
The ELU-20RZ unit is equipped with an energy complex of the ELA-60/60 type. The electron-optical system of the gun forms an electron beam with specified parameters. The microprocessor device controls all parameters of the energy complex, provides the necessary locks. The gun is carried out using a turbomolecular pump to increase the performance and service life of the cathode, differential pumping of the cathode unit of.

Vacuum system.
The vacuum in the working chamber is obtained using vacuum stations, which are a set of interconnected devices - pumps, shut-off devices, pipelines, filters, traps, vacuum measuring devices, control and management tools.

Pneumatic system.
A set of pneumatic tools supplies compressed air to the cylinders of the sliding cover clamps and the cylinders of the vacuum system valves. The working pressure is adjusted using a pressure regulator built into the filter regulator. The unit is supplied with compressed air autonomously from a compressor with a receiver.

Water cooling system.
The water cooling unit consisting of a pressure-drain manifold, a chiller, a set of temperature, water flow and pressure sensors ensures safe operation of the electron beam gun, pumps and traps. The presence and temperature of water in the cooling channels at the outlet are monitored using flow and temperature sensors.

Control system.
The control system ensures the following functions:
- interpolation numerical control of the axes of the gun and product manipulators according to the control program;
- setting the contours of the parameters of the energy complex (beam current, focusing current, currents of the deflection systems along the X and Y axes, sweep amplitude) in the control program of the welding process;
- automatic control of the operation of vacuum station elements with the ability to work in manual mode;
- beam adjustment to the joint;
- documentation of the main welding parameters (printout of the welding passport of the part indicating the date, part number, welding mode).

The multiprocessor control system (CS) of the ELU-20RZ plant is built on the basis of a CNC device, an industrial computer, and a programmable logic controller.

Advantages of the unit:
- Elimination of the influence of subjective factors on the welding process by fixing the debugged standard technological welding process in the control program and the ability to block unauthorized changes to the program;
- High stability of process parameters;
- Increased accuracy of mechanical movements;
- Increased comfort of the welder-operator's working conditions due to the integration of controls at the workplace;
- Improved maintainability due to automatic diagnostics and testing of equipment by means of a computer control system;
- Solution of the interpolation problem of controlling mechanical coordinates and technological parameters (process current, focusing current, currents of deflecting systems, etc.).
- The unit is equipped with a computer control system that provides automatic control of the vacuum preparation process, software control of the welding process, automatic monitoring of the main parameters of the welding mode, printing of the welding process passport containing the part number, welding process characteristics, detected deviations from the standard technological process, date and name of the performer (operator).