Do you know the main parts of the roll forming process?

In the manufacture of automobile doors, roll forming technology has been widely used. The application of this technology can not only make the door extension lines smooth and beautiful, but also the production process is relatively simple, and the cost is not high. One type of door frame strip can be used in the doors of a variety of vehicle models. Do you know the main parts produced by rolling process? Let's take a look together below.

1. Rim. Roll forming is the main forming process of rolling wheel rims. Rolling wheels are mainly used in passenger cars with very high manufacturing accuracy. The rims are not allowed to leak during rolling and welding.

2. Door frame strips. The door frame strip is asymmetrical and special-shaped cross-section, which requires multiple passes of roll forming. Therefore, it is necessary to accurately calculate the expanded size of the cross section according to the specific size and material of the door frame strip, formulate a reasonable rolling forming process, and design the shape and size of each forming roller , Determine a reasonable clearance and set a reasonable auxiliary roller. Mass production needs to combine the front of the roll forming and the back of the strip straightening with the shaping process, the roll welding machine and the automatic material cutting device to form a door frame strip production line.

3. Frame rails. Roll forming has developed rapidly. Especially for the production of longitudinal beams with constant cross-section, it has unique advantages. The roll-formed stringer technology has low investment and quick results, and is especially suitable for the production of multi-variety, medium and small batch stringers. The surface quality of the roll-formed stringer is good, and there is no trace of strain on the wing surface. Roll forming is a continuous forming process with low forming force and low noise. It is a production process for stringers worth promoting.

4. Crankshaft. Rolling strengthening and straightening is a key process in crankshaft production. After repeated machining and heat treatment of the crankshaft, a strong stress concentration is formed at the rounded corners of the shaft diameter and causes the crankshaft to bend. The rolling and straightening of the crankshaft strengthens the crankshaft, and at the same time corrects the bending deformation. At present, the process has realized computer automatic detection and control.

5. Small modulus spline shaft. The roll forming process is a method of spline forming, which can form straight-tooth involute splines and spiral splines, with stable forming accuracy and high production efficiency. The spline surface of the produced parts has low surface roughness and high strength. Compared with the cutting tooth profile, the shear strength of the parts is increased by 4% to 8%, and the fatigue strength is increased by 40% to 100%.

6. Screws. Roll forming is an important method for manufacturing high-strength bolts and trapezoidal screws. Roll forming thread belongs to the cold extrusion forming process and does not cut the metal fiber, so the roll forming thread has high strength, stable quality, and high efficiency of roll forming thread. Used in the processing of threads such as screws and pipe fittings with strength requirements.

7. Others. Rolling technology has also been used more and more in the precision machining of the outer diameter of shaft parts. The application of rolling technology will become increasingly widespread.