Rolling processing is a chip free machining method that utilizes the cold plasticity characteristics of metals at room temperature. By applying a certain pressure to the surface of the workpiece through rolling tools, the surface metal of the workpiece undergoes plastic flow and is filled into the original residual low concave valleys, thereby reducing the roughness value of the workpiece surface. After rolling processing, a cold work hardening layer is formed on the surface of the workpiece, which improves the hardness and strength of the surface, while leaving residual compressive stress, helping to seal small cracks on the surface and hinder the propagation of erosion.

Improving surface quality: Rolling processing can significantly reduce the roughness value of the inner surface of the cylinder, usually reaching Ra0.4-0.8 microns, or even lower, approaching a mirror effect. At the same time, rolling processing can also correct shape errors such as roundness and ellipticity, and improve the geometric accuracy of the cylinder.
Enhance wear resistance and corrosion resistance: The cold work hardening layer formed on the surface of the cylinder by rolling processing reduces the elastic and plastic deformation of the contact surface of the grinding pair, and improves the wear resistance of the inner wall of the cylinder. In addition, the presence of residual compressive stress also enhances the corrosion resistance of the cylinder barrel.
Improving fatigue strength: After rolling processing, the residual compressive stress on the surface of the cylinder helps to delay the occurrence or expansion of fatigue cracks, thereby improving the fatigue strength and service life of the cylinder.
Improving fit properties: Rolling processing reduces the roughness value of the cylinder surface, improves the contact state of the fit surface, enhances fit properties, and helps reduce friction and wear during motion.
High production efficiency: Compared with traditional grinding processes, rolling processing has higher production efficiency. For example, rolling a 1-meter-long cylinder takes about 10-30 minutes, while grinding takes 1-2 days.
Low cost: The rolling processing equipment is relatively simple and the investment cost is low. Meanwhile, due to the improved surface quality and wear resistance of the cylinder barrel through rolling processing, the frequency of subsequent maintenance and replacement is reduced, thereby lowering the overall operating cost.

Rolling processing is suitable for cylinder barrel processing of various materials, including carbon steel, alloy steel, stainless steel, etc. Especially for cylinder tubes with deep hole machining, rolling machining can better leverage its advantages and solve high-precision and high-efficiency machining problems that are difficult to achieve with traditional machining methods. In addition, rolling processing is also suitable for the processing of extra large cylinder bodies and the finishing of extra small holes.

The processing steps of rolling cylinder usually include the following steps:
Pre machining: rough machining of the cylinder barrel using methods such as turning or boring to ensure the geometric and dimensional accuracy of the cylinder barrel. The surface roughness value after pre-processing should meet the requirements of rolling processing.
Rolling processing: Select appropriate rolling tools and parameters to perform rolling processing on the surface of the cylinder. During the rolling process, attention should be paid to controlling parameters such as rolling force, rolling speed, and rolling frequency to ensure processing quality.
Testing and acceptance: Testing and acceptance of the cylinder after rolling processing, including surface roughness, shape error, dimensional accuracy, and other aspects. Ensure that the machining quality of the cylinder barrel meets the design requirements.

Choose the appropriate rolling tool: Select the appropriate rolling tool according to the material, size, and processing requirements of the cylinder. The material, shape, and size parameters of the rolling tool have a significant impact on the processing quality.
Control rolling parameters: During the rolling process, parameters such as rolling force, rolling speed, and rolling frequency should be strictly controlled. Excessive rolling pressure can cause deformation or cracking of the cylinder barrel, excessive rolling speed can affect processing quality, and too many rolling times may damage the cold-rolled layer.
Ensure the quality of pre-processing: The quality of pre-processing has a significant impact on rolling processing. The surface of the pre processed cylinder should be smooth, free of defects such as cracks and slag inclusions, and the dimensional and geometric accuracy should meet the requirements.
Pay attention to processing safety: During the rolling process, attention should be paid to safe operation to avoid work-related accidents. Operators should be familiar with the performance and operation methods of rolling equipment, and strictly follow safety operating procedures.
In summary, rolling cylinder is an efficient and high-quality machining process with significant advantages and a wide range of applications. In practical applications, suitable rolling tools and parameters should be selected according to the material, size, and processing requirements of the cylinder, and each link in the processing process should be strictly controlled to ensure the processing quality and performance of the cylinder.