(L) standard demanding welding ribs (full circle altogether 81 bars, standard number as 9 bars). Requirements chord from the sub, its radius, verticality (including front and side), to the heart of shall meet the requirements;

(2) In order to reduce welding deformation, with fine small current welding electrodes;

(3) To reduce the temperature, using a special welding sequence;

(4) Location bar solder care block once before straightening, welding holder block before straightening once;

(5) The base thin, easily deformed, so positioning ribs and care block welded without using the traditional fixed supporting floor jack, instead of using C-clamps temporary fixation;

(6) To facilitate the adjustment, design and manufacture a new type of positioning adjustment tool bar chord distance measurement dial indicator;

(7) To ensure the correct position windshield assembly and welding, making a simple positioning plate, and check the location by punching.

Unit pressure means that the material is 40Mn18Cr4V. This material is very difficult process, especially in the face of pressure finger tapping M6 holes to be drilled, more difficult. Meanwhile, the bottom hole well drilling, even drilled out, tapping attack also does not move. Finally, we used a steel drill hole, with the new tap-tapping, and finally overcome the difficulties, the successful completion of the processing tasks.