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          Double head sand belt machine is a device used for surface grinding, polishing and other processing of workpieces. It has two sand belt polishing devices and is widely used in industries such as mechanical manufacturing and hardware tools. Here is a detailed introduction about it:
1. Structural composition
Including machine base, two sets of sanding belt polishing devices, transmission mechanism, extendable bracket, tensioning wheel mechanism, ash hopper, and protective cover. Among them, each set of sanding equipment includes a bearing seat, an active sanding wheel, and a passive sanding wheel. The active sanding belt wheel is rotatably supported on the bearing seat and connected to the transmission mechanism. It is usually made of rubber, which has good elasticity and will not damage the workpiece. The passive sanding belt wheel is fixed on a telescopic bracket, and the distance between the belt wheel and the active sanding belt wheel is changed through the linear motion of the telescopic bracket, allowing the sanding machine to use various specifications of sanding belts. The tensioning wheel mechanism is used to adjust the position of the passive sanding belt wheel axle, thereby tensioning the sanding belt.
2. Working principle
The transmission mechanism of the dual head sanding belt machine drives the active sanding belt wheel to rotate, thereby driving the sanding belt to rotate. The workpiece is in contact with the surface of a high-speed rotating sand belt, and through the grinding action of the sand belt, processing operations such as polishing, deburring, trimming, and polishing of the workpiece surface are achieved. Operators can adjust the specifications of the sand belt, grinding speed, and pressure between the sand belt and the workpiece according to the material, shape, and processing requirements of the workpiece, in order to achieve the desired processing effect.
3. Performance characteristics
Double head sanding machines usually have high processing efficiency, and two sanding devices can work simultaneously, which is equivalent to the workload of two single head sanding machines, and can complete more processing tasks in a shorter time. Its processing accuracy is high. By precisely adjusting parameters such as the tension, polishing speed, and pressure of the sand belt, high-precision processing of the workpiece surface can be achieved, and the surface roughness can reach a low level to meet the needs of different customers. In addition, the equipment has strong applicability and can adapt to processing workpieces of various materials and shapes, such as metal, non-ferrous metal, non-metal, etc., by replacing different types and specifications of sand belts.