The deep hole rolling cutter is a tool for processing holes with a length-to-diameter ratio of 1:10 or more. Generally, such deep holes cannot be processed to a roughness of about Ra0.2. The deep hole rolling head is a rigid multi-cylindrical roller rolling tool used at room temperature, which can cause plastic deformation of the metal surface layer to correct the microscopic unevenness of the surface of the workpiece, reduce the surface roughness value, and replace the surface of the workpiece. Heat treatment and finishing process. Suitable for tapered rollers, adjustable in diameter, suitable for rolling and finishing of deep holes after finishing, with convenient operation and use, high processing efficiency, etc.
Rolling processing principle: It is a pressure finishing process, which uses the cold plastic characteristics of metal at room temperature, and uses rolling tools to apply a certain pressure on the surface of the workpiece, so that the surface metal of the workpiece produces plastic flow and fills it into the original residue. In the low concave wave trough, the surface roughness value of the workpiece is reduced. Due to the plastic deformation of the rolled surface metal, the surface structure is cold hardened and the crystal grains become finer, forming a dense fiber shape, and forming a residual stress layer, which improves the hardness and strength, thereby improving the wear resistance and corrosion resistance of the workpiece surface Sexuality and coordination. Rolling is a non-cutting plastic processing method
The rolling tool has no edge, and the processing technology is safe and convenient. It can basically be used in all metal processing industries. It can accurately control the accuracy. It has several advantages:
1. Improve the surface roughness, which can basically reach Ra≤0.08um.
2. Correct the roundness, the ellipticity can be ≤0.01mm.
3. Improve the surface hardness, eliminate the stress deformation, and increase the hardness by HV≥4°
4. There is a residual stress layer after processing, which improves the fatigue strength by 30%.
5. Improve the quality of the fit, reduce wear and extend the service life of the parts, but the processing cost of the parts is reduced.