Check the edges of the sheet material on the shearing platform for any obvious damage before cutting. Any deformations should be flattened or removed on the scrap side.

Ensure precision in marking and cutting dimensions, with a cutting width tolerance within ±2mm.

Any rust and oil stains on the sheet surface should be ground and cleaned before welding.

Perform a first piece inspection confirmation for batch cutting.

For the bending of roll bars, the upper and lower dies should be adjusted according to the diameter and thickness requirements of the bar. The appropriate bending knife and pressure of the presses at both ends should be set, and the relevant parameters should be recorded (CNC bending machine) to provide data for subsequent operations.

Before bending, ensure the linkage synchronization of the bending machine to avoid concave and convex marks caused by asynchronous movements.

Bars should be formed in one step. Automatic or semi-automatic arc welding should meet Level 3 or higher welding standards.

After the bars are bent and formed, the end face twist angle deviation should not exceed 2°, and the deviation for long bars should not exceed 4°.

For multi-angled bars, the laser cutting error should be controlled within ±0.3mm.

For equal division of multi-angled edges during bending, the bending line deviation should not exceed 1mm, and the diagonal deviation after bending should not exceed 3mm.

The straightness deviation of bars should not be greater than 1‰, and the straightness deviation for tapered pipes or spigot-type bars should not be greater than 3‰.

The length deviation of the bars should be ±2% of the bar length.

For batch cutting, ensure the first sample inspection is confirmed.

The straightness deviation of plate rods should not exceed 1‰, and the straightness deviation of tapered pipes or spigot rods should not exceed 3‰.

After shaping, if the upper diameter hole becomes non-circular or deformed, it should be reshaped using a conical mandrel.

When straightening, pay attention to small bends within 1.5 meters at both ends of the rod. Use movable wooden blocks to support and straighten the bent areas.

On the material layout of the rods, markings for upper and lower diameters should be evenly divided.

Hollow bolt installation holes should be included according to the requirements of the drawings.

For multi-angled edge bending lines, equal division distances should be maintained, and the deviation of the bending lines should not exceed 0.3mm.

When cutting irregular shapes on thin plates for lamp heads, cutting guides should be included.

In batch cutting, ensure the first sample inspection is confirmed.

After cutting flanges and bolt installation holes on medium-thick plates, edge burrs and dross should be polished clean before proceeding to the next process.

Welding for light poles should employ gas shielded welding. Welding materials should comply with welding process requirements, and welding quality should not be lower than Grade III weld standards.

The appearance should be uniform, smooth, and well-formed. There should be smooth transition between the weld and the basic components without any cold welding, and welding slag and spatter should be thoroughly cleaned.

For flange welding, the flange edges should be inspected for defects, and any defects should be polished to ensure they are in good condition.

During flange welding, maintain perpendicularity with the centerline of the rod, and reinforcing ribs should be welded vertically to the flange rod.

During welding, all openings (doorways) and installation of C-shaped groove hole positions should be based on the flange bottom surface.

For poles with different identification points, confirm the orientation of the flange position before welding.

At the junction of upper and lower rod diameters, a horizontal line should be marked first using jigs, and after aligning the axes of the upper and lower poles, the joints should be fitted (paying attention to the straightness of the poles).