CN102079010A - Test method for focusing current on welding surface of electron beam - Google Patents

Abstract

A test method for focusing current on the welding surface of an electron beam comprises the following steps: 1) processing a test panel, wherein the panel is 300 mm long, 300 mm wide, and 3 mm thick; four notches uniformly distributed are arranged on two boundary lines opposite to the panel in parallel; and one end of each notch is configured to be opened, and the other end of the notch is sealed; 2) fixing the test panel on a horizontal workbench, wherein the sealed end of each notch is contacted with the workbench, and the inclined angle of the test panel and the workbench is 45 degrees; 3) welding the notches, wherein the notches are respectively welded with given same welding parameters and a given distance from an electron gun to the workbench; 4) taking a test piece after being welded and determining a section of welding seam with qualified welding quality through checking; and 5) calculating the distance from the electron gun to the test panel according to the qualified section of welding seam. The test method has the advantage of high test speed and is accurate in testing.

Description

The method of testing of electron beam welding surface focus current

Technical field

The present invention is the method for the electron beam welding surface focus current of certain thickness part of test.

Background technology

Important affair is carried out the test of surperficial focus current earlier before certain part of welding, promptly measure the surface distance of electron beam gun to test specimen, used in the past method of testing is to get welding ready with the test block surface focusing of part match thickness, select different focus current and focal position, when the brightest and Dapple occurring on the view screen, be the surperficial focus of this kind thickness part by relatively drawing.This method of testing test speed is slow, and the result is inaccurate with the eyes observation test, influences welding quality.

Summary of the invention

The purpose of the invention provides a kind of method of testing that can improve test speed and improve the electron beam welding surface focus current of test mass; The purpose of the invention is to realize by following technical scheme:

The method of testing of electron beam welding surface focus current, under its step duty:

1), processing test slab: dull and stereotyped specification is that long 300mm, wide 300mm, the thick part that equals are thick, makes four equally distributed notches with dull and stereotyped two opposite edges line parallel, and notch one end is made the opening shape, an end closed;

2), test slab is fixed on the workbench of level: notch closed end in contact workbench, 45 ° of test slab and workbench angles;

3), welding on the lath: on lath, weld respectively to the distance of workbench with given identical welding parameter and given electron gun;

4), get the postwelding test piece and determine one section qualified weld seam of welding quality through check;

5), calculate the distance of electron gun to test slab according to one section qualified weld seam.

The advantage of the invention: because on a test slab, weld many weld seams, can take out a plurality of test pieces and carry out quality inspection, therefrom find out the one section weld seam that conforms to quality requirements, calculate the distance of electron gun to piece surface, it is electron beam welding surface focus current, test speed is fast, and test accurately.

Description of drawings

Fig. 1 is the schematic diagram that test slab is made notch.

Fig. 2 is fixed on test slab in the work and constitutes the α angle, the test piece that postwelding conforms to quality requirements and the position view of electron beam gun.

Among the figure: 1,2,3, the 4th, the notch of on test slab, making 5, lath 6, test slab A, electronic beam current B, welding direction C, the position D at electron gun place, the weld seam mid point E that meets the test piece of welding quality, the one section weld seam h that meets welding quality, be the distance h 1 of the position at electron gun place to the weld seam mid point of the test piece that meets welding quality, be the distance h 2 of the position at electron gun place to workbench, the weld seam mid point of test piece that meets welding quality is to the distance alpha of workbench, test slab and workbench angle L are the weld seam mid point that meets the test piece of welding quality contacts the point of workbench to test slab distance.

The specific embodiment

According to the thick 3mm of part is example:

The method of testing of electron beam welding surface focus current, under its step duty:

1), processing test slab: dull and stereotyped specification is long 300mm, wide 300mm, thick 3mm, makes four equally distributed notches with dull and stereotyped two opposite edges line parallel, and as shown in Figure 1, notch one end is made the opening shape, an end closed;

2), test slab is fixed on the workbench of level: available plain type dress is fixing, the test slab end in contact workbench of notch closed end, and test slab and workbench angle α are 45 °;

3), welding on the lath: on lath, weld respectively to the distance h 1 of workbench with given identical welding parameter and given electron gun; Accelerating potential U=55kv, focus current J=2.17A, welding line I=27mA, speed of welding F=600mm/min;

4), get the postwelding test piece and determine one section qualified weld seam of welding quality through check; Press sight check of GJB1718A test stone and x-ray examination;

5), calculate the distance h of electron gun to test slab according to one section qualified weld seam;

h＝h1－?h2

In the formula: h1 is the distance of the position at electron gun place to workbench, can measure

H2 meets the weld seam mid point of test piece of welding quality to the distance of workbench

h2＝L×sinα＝L×sin45°

L meets the weld seam mid point of test piece of welding quality to the distance of the point of test slab contact workbench, can measure.

Claims (1)

1. the method for testing of electron beam welding surface focus current, under its step duty:

1), processing test slab: dull and stereotyped specification is that long 300mm, wide 300mm, the thick part that equals are thick, makes four equally distributed notches with dull and stereotyped two opposite edges line parallel, and notch one end is made the opening shape, an end closed;

2), test slab is fixed on the workbench of level: notch closed end in contact workbench, 45 ° of test slab and workbench angles;

3), welding on the lath: on lath, weld respectively to the distance of workbench with given identical welding parameter and given electron gun;

4), get the postwelding test piece and determine one section qualified weld seam of welding quality through check;

5), calculate the distance of electron gun to test slab according to one section qualified weld seam.

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