When selecting a mill according to the grinding process and equipment, the following key factors need to be considered:
** 1. Grinding process **
1. Rough grinding
- Select the grinding disc with large particle size and strong cutting ability. For example, the use of corundum or silicon carbide material coarse-grained grinding, can quickly remove material margin.
- For large size and high allowance workpieces, thick grinding plates can be selected to ensure sufficient grinding force and durability.
2. Fine grinding
- Preference is given to pieces with smaller particle sizes and more delicate surfaces, such as fine-grained ceramic binder pieces, for higher surface accuracy and finish.
- When grinding, the hardness of the grinding disc should be moderate, which can ensure the grinding effect and is not easy to cause surface burns.
Step 3: Polish
- Select specialized polishing pieces, usually with very fine particles and a soft texture. For example, the use of wool or sponge material polishing pieces, and with the appropriate polishing paste.
- For highly demanding mirror finishes, it may be necessary to use multiple polishing pieces of different particle sizes for step-by-step processing.
Two, grinding equipment **
1. Hand tools
- Such as hand-held Angle mills, due to their relatively low speed and power, thinner and smaller diameter blades should be selected to reduce the operating burden and ensure safety.
- For manual operation, it is more suitable to choose a better self-sharpening blade to reduce the trouble of frequent replacement.
2. Bench grinder
- Select the corresponding grinding disc according to the spindle speed and power of the grinding machine. The high speed grinding machine can be matched with a higher hardness, finer particle size grinding disc to give full play to its performance.
- Consider the clamping device of the grinder, and select the grinding disc with the matching size and shape to ensure a stable installation.
3. CNC grinding machine
- In order to achieve high precision and automatic processing, it is usually selected to have stable quality and good consistency of brand grinding pieces, such as high-quality ceramic binder grinding pieces.
- Select the grinding disc with suitable grinding performance and durability according to the grinding parameters set by the CNC program.
For example, in an auto parts production workshop, for the rough grinding process of the engine block, a large bench grinder is used, equipped with a large diameter and thicker coarse-grained corundum grinding plate; In the subsequent finishing process, the same grinder is replaced with a fine-grained ceramic binder grinding disc.
For example, when a manual enthusiast uses a handheld Angle grinder to polish small metal workpieces, he chooses a thinner, medium-size resin binder grinding disc, which is easy to operate and can meet the general processing needs.