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Sand belt machine is a tool that uses the high-speed rotational motion of sand belt and the relative motion of the workpiece surface to perform surface treatment such as grinding and polishing on the workpiece. The following is a detailed introduction about the sand belt machine:
1、 Working principle
The motor drives the active roller to rotate and drives the sand belt to perform continuous cyclic motion through friction. The operator contacts the workpiece with the moving sand belt at appropriate pressure and angle to achieve material removal and surface treatment. The grinding process is actually a micro cutting of the workpiece surface by a large number of tiny abrasive particles.
Sand belt grinding not only has the same sliding, plowing, and cutting effects as grinding wheels, but also has a comprehensive effect of abrasive particles squeezing the surface of the workpiece, causing plastic deformation, cold hardening layer changes, and surface tearing.
2、 Structural composition
1. Power system: mainly composed of motors, providing power for the operation of sand belts. Common motor powers range from several hundred watts to several kilowatts to meet different processing needs.
2. Sand belt transmission system: including driving roller, driven roller, and tensioning device, etc. The active roller is driven by a motor, which drives the sand belt to move; The driven roller plays a role in supporting and guiding the sand belt; The tensioning device is used to adjust the tension of the sand belt, ensuring that the sand belt maintains appropriate tightness during operation, in order to improve grinding efficiency and quality.
3. Contact device: usually in the form of contact wheels or pressure grinding plates, it is used to control the contact pressure and contact area between the sand belt and the workpiece, which affects the grinding effect and accuracy. Contact wheels of different hardness and shapes can be replaced according to processing requirements.
4. Machine body and supporting components: used to fix and support various components, ensuring the stability and rigidity of the sand belt machine. Common machine body structures include desktop, vertical, horizontal, etc., to adapt to different work scenarios and workpiece types.