Construction process of each link of steel structure

Construction process of each link of steel structure

Cutting process

1. Multi-head cutting machine in the south: 0# Cutting nozzle 2mm cutting allowance North machine: 2# cutting nozzle 3mm cutting allowance 5~10mm cutting edge material (to prevent uneven heating and deformation of the edge)

(1) Review the drawings;

(2) Select the correct plate type (material, thickness);

(3) On the crane plate Cutting platform, ensure that the edge of the board is parallel to the track of the cutting machine;

(4) Determine the spacing of the cutting nozzles (plus cutting allowance), and adjust the height of the cutting nozzles;

(5) Preheat the starting end, start cutting, and adjust the cutting speed according to the thickness of the steel plate.

2. Variable-section web cutting tools: box ruler, steel meter ruler, ball-point pen, stone pen, semi-automatic cutting machine, ink fountain

(1) Review the drawings;

(2) Draw the angle templates at both ends of the variable-section web on the lofting paper, and cut the templates according to the lines;< /p>

(3) Lay the template on both ends of the steel plate and use a stylus to determine the upper and lower ends of the web length direction;

(4) Use an ink fountain to pop out the cutting line in the length direction of the web, and use a meter ruler to draw a diagonal line in the width direction;

(5) Lay the cutting machine track parallel to the On one side of the cutting line, the distance between the edge of the track and the cutting line is 100mm;

(6) Put the cutting machine on the track, and adjust the angle of the cutting nozzle and the distance to the steel plate;

(7) Ignition, preheating, cutting;

(8) Pay attention to the difference between the track and cutting line during cutting distance.

Hole-making process

1. Review the drawings and determine the thickness and geometric dimensions of each hole-making part;

2. Lift and transport the finished sheets that meet the drawing specifications;

3. Clean up the sheets on each sheet Impurities such as iron oxide;

4. Select a sheet as the template, and determine the two reference edges of the template hole;

5. Set the center of the hole along the reference edge in turn (use a sharpened stone pen or a scribe);

6. Close the center of each hole and report to the workshop for quality The inspector inspects the template, and the hole is allowed to be made if the template is qualified;

7. Place the sheet of the same specification on the drilling machine, and the template is on the top to ensure that each sheet is The reference edge is flat (adjust with a square ruler and a small hammer):

8. Select a drill bit with the same specifications as the drawing requirements (if there is no suitable drill bit, use The drill bit is one size larger than that required by the drawing);

9. Before making the hole, use the positioning thimble to find the hole on the sample board, and then replace the drill bit with the dead drilling machine. Turn on the cooling water and start making holes;

10. The following hole-making parts of the same specification are all positioned using the first batch of sample sets of holes. Note: (1) Linoleum is used as the template for the drilling process of the small table. The benchmark edge is determined for the template, and the template is laid flat on the sheet. After aligning the benchmark edge, the hole is closed, and then the hole is made; (2) Air cutting is not allowed. hole or reaming.