Pay attention to the following points during grinding: (l) The grinding wheel should be selected with suitable sand material, the hardness should be low, the grain size should be thick, the structure should be loose and the grinding wheel should be trimmed frequently to keep sharp and beneficial for grinding. (2) Smaller vertical feed (less than 0.Olmm) and small lateral feed should be selected during grinding, and sufficient cooling should be taken to prevent the universal adhesive ro3 from failing due to excessive temperature of the workpiece. Processing technology of stainless steel ring parts In chemical products, there are many ring-shaped parts of special materials such as sealing rings and gaskets. In general production, free forging or film forging process is adopted to meet the production requirements of multiple varieties and small batches. However, the forgings processed by this method have large errors, large machining allowances, and serious material waste. The reduction of material consumption has become a top priority for enterprises.
Through repeated research and experiments, the ring rolling machine was used to produce stainless steel ring parts of our factory, and preliminary results were obtained. The improvement of this process, the single piece material rate can reach 20% to 30%, and the concentricity is good, the machining allowance is small. 1. Determination of process parameters (l) Forging temperature Due to the high strength of stainless steel, it is necessary to use large rolling pressure, and low temperature is easy to cause insufficient rolling size. Therefore, the final forging temperature should not be too low. Generally, the forging temperature range of 1180-950 is adopted, which is easy to form and relieves the stress state of the equipment during the rolling process. (2) The rolling ratio is in the rolling of the bearing ring, and the input is 1.5. The stainless steel rolling ratio should be smaller than the bearing ring. In practice, we choose to enter = l.5-2, the effect is good, can avoid the internal hole burr. (3) Compressed gas pressure. Refer to the equipment instruction manual to increase the pressure by 10%.
Matters needing attention (1) The above processing technology is illustrated by the Dsl-25C vertical vertical ring rolling machine. The accurate data of stainless steel grinding and expanding is still available for reference. The unit configuration equipment is different and the process methods are different. Therefore, Continuously experiment and summarize experience and empirical data. (2) Due to the difference in diameter and single-sided thickness of the milled and expanded parts, the cold shrinkage of the parts after grinding and expanding is different, and the value of the grinding and expanding can be corrected in practice. (3) Due to the large impact force in the initial stage of rolling, the roller is prone to breakage. In the process of manufacturing and manufacturing, it is necessary to strictly control the matching precision of the taper surface and the inner hole of the equipment taper sleeve. The length of the working part should be consistent with the roller.
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