Details of the fine-tuning process for the double-sided grinding machine method
Release date:
2020-02-17 00:00
Source:
Double-sided grinding machine processing method:
1. Dry Grinding: During dry grinding, only a small amount of lubricant additive needs to be applied to the surface of the grinding tool. The abrasive grains remain largely fixed to the tool throughout the process, and their cutting action is primarily achieved through sliding abrasion. While this method isn’t highly productive, it can deliver exceptionally high machining accuracy and produce surfaces with very low roughness values (Ra 0.02–0.01 μm).
2. Wet Grinding: During the grinding process, the abrasive material is applied onto the lap, and grinding is carried out using dispersed abrasive particles. In addition to the abrasive grains, the abrasive mixture typically includes substances such as kerosene, machine oil, oleic acid, and stearic acid. As the grinding progresses, some of the abrasive particles become trapped between the lap and the workpiece, as illustrated in Figure 8-12b. At this stage, the primary grinding action relies on rolling abrasion, resulting in high productivity and achieving a surface roughness of Ra 0.04–0.02 μm. This method is commonly used for rough machining, though the finished surfaces usually lack a glossy finish.
3. Soft Abrasive Grinding
During the grinding process, a double-sided grinder applies a chromium oxide-based abrasive coating onto the working surface of the lap. Since the abrasive material is softer than both the lap and the workpiece, it remains suspended between them throughout the process. The primary mechanism relies on the chemical interaction between the abrasive and the workpiece surface, forming an extremely thin oxide film. This film is easily removed at protruding areas by the abrasive action. As a result, this method achieves exceptionally fine surface roughness, typically ranging from Ra 0.02 to 0.01 μm.
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Several forms of the double-sided grinding machine processing method
1. Dry Grinding: During dry grinding, only a small amount of lubricant additive needs to be applied to the surface of the grinding tool. The abrasive grains remain largely fixed on the tool throughout the process, and their cutting action is primarily achieved through sliding abrasion. While this method isn’t highly productive, it can deliver exceptionally high machining accuracy and produce surfaces with very low roughness values (Ra 0.02–0.01 μm).
2020/03/19
