SU1454611A1 - Apparatus for electron-beam welding - Google Patents

Abstract

The invention relates to electron-beam welding, in particular to equipment for electron-beam welding. The purpose of the invention is to provide technological research and improve the quality of welding by accurately selecting the welding energy parameters and stabilizing the thermal mode of the electron beam gun before the welding process. In the device for electron-beam welding, a water-cooled mold 6 is installed coaxially with an electron-beam gun 2 under the turntable 4, and at least one through groove 7 is made at the welding position of the turntable 4. beam gun 2 to chill mold. This allows you to bring the gun 2 to the operating mode and to select the optimal energy parameters of the welding process, which guarantee high welding quality. 2 Il. § (/)

Description

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This invention relates to electron beam welding, in particular to equipment for electron beam welding.

The purpose of the invention is to provide technological research and improve the quality of welding by accurately selecting the energy parameters of welding and stabilizing the thermal mode of the electron beam gun before carrying out the welding process.

FIG. 1 is a diagram of an apparatus for electron beam welding; figure 2 - rotary table of the device with a through groove (type A in figure 1

The device consists of a vacuum chamber 1 with an electron-beam gun 2 located on the upper wall of chamber 1. The rotary table 4 rotary actuator 3 through gears 5 is located in the lower part of the vacuum chamber 1 under the rotary table 4. Diametrically opposite to the rotary axis of the rotary table 4 water-cooled chill mold 6 mounted coaxially with the axis of the electron beam gun 2 under the turntable 4. On the part of the circumference of the turntable 4 at the intersection of the plane of the turntable 4 with the axis of the electron beam Scc 2 is made through the groove 7.

The device works as follows.

After placing the parts to be welded on the rotary table 4 and vacuuming the vacuum chamber 1, the operator positions groove 7 above the water-cooled chill mold 6. Then the operator switches on the electron beam gun 2, smoothly (by potentiometer) increases the current from the minimum to maximum value and compares its value with the instrument readings located in the positive circuit of the power source, thus making active control of the electron beam current. After some time, when the thermal processes in the electron-beam gun 2 stabilize and the latter is brought to the operating mode of the welding process, the operator sets the required value of the welding current of the electron beam with a potentiometer. Having checked the position of the focus relative to the plane of the welded part, the operator turns on the actuator 3 of the rotation of the rotary table 4 and produces welding

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ku These operations are repeated after each depressurization of the vacuum chamber 1.

Making the through groove 7 in the turntable 4 and placing the water-cooled chill 6 below it allows preparing the electron beam gun 2 for welding, i.e. to bring the heat processes in the gun before welding to the operating mode of the welding process and to degass all of the gun surfaces.

In this device for electron-beam welding, the warm-up time of the electron-beam gun before work is significantly reduced; this is achieved due to the fact that the heating is carried out at the maximum current of the electron beam corresponding to this electron beam gun, while diverting the power flow of the electron beam to water-cooled chill

The proposed device allows welding in one technological cycle of parts made of various materials and makes it possible to fully check the efficiency of the starter in all modes in the overall composition of the electron-beam power complex - a high-voltage power source before and during the welding process.

Claims (1)

Thus, the invention makes it possible to improve the quality of welding and significantly expands the field of application of devices for electron beam welding of parts with rotary tables. An apparatus for electron beam welding, comprising a vacuum chamber, an electron beam gun, a rotary table for laying the parts to be welded, and a rotary table rotational drive, characterized in that, in order to ensure technological research and improve the quality of welding by precisely selecting the welding energy parameters and stabilization of the thermal mode of the electron-beam gun before the welding process, the device is equipped with a water-cooled chill mold installed under the turntable o Unsymmetrically to the axis of the electron beam gun, and at the intersection of the axis of the electron beam, the gun with the plane of the turntable is made of at least one through groove. Vida shchig.1