The fuselage adopts a three beam and four column structure. The upper beam and workbench are combined into a fixed frame through columns, fastening nuts, and adjusting nuts. The accuracy of the frame is adjusted by adjusting the nuts, which has good strength, rigidity, and accuracy retention.

The upper beam, worktable, slider and other large components are welded steel plates. After computer optimization design, their strength, rigidity, structure, anti deformation and other properties meet the standards and usage requirements, and have sufficient safety factors; Carbon dioxide gas shielded welding combined with manual arc welding is used to achieve the required welding quality, and deformation stress is eliminated through aging vibration treatment.

Sliding block: a welded steel plate with a box shaped structure, and the material of the guide sleeve at the four column guide hole is nano molecular composite material, which has good resistance and accuracy retention. The lower plane of the slider has a T-shaped groove for installing the mold.

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