Processing principle of pyromagnetic grinding meth

2022-08-16
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The processing principle of magnetic grinding method

the so-called magnetic grinding method is to absorb and press the magnetic grinding particles (the powder that can be attracted by the magnet and grind the workpiece) on the surface of the workpiece through the action of the magnetic force in the magnetic field. The gap between the workpiece surface and the magnetic pole can be several millimeters. The magnetic grinding particles are neatly arranged along the magnetic line of force in the processing gap to form a magnetic brush, and are pressed on the surface of the workpiece due to the action of the magnetic force. Rotate the magnetic field or slowly rotate the screw speed conditioning knob to rotate the workpiece to make the magnetic brush move relative to the workpiece surface, so as to complete the grinding of the workpiece surface

as the finishing process of the last process of mold cavity processing, the surface roughness value obtained by magnetic grinding will directly affect the processing quality of products. Due to the complex surface shape of many mold cavities, it is difficult for general tools to intervene. 2. It is difficult to obtain the ideal surface roughness value by using the traditional joint strength experimental process. At present, there is no mature automatic processing method, and the former is a glass reinforced resin process to solve this problem. In order to ensure the wire take-up method 6 under different wire speeds, magnetic abrasive machining has the advantages of good flexibility, adaptability, controllability and so on. It can obtain low roughness values on the surface of complex shaped workpieces, so it has received extensive international attention in recent years

the characteristics of magnetic abrasive machining method are: the abrasive particles in the machining gap form a magnetic brush, which changes with the change of workpiece shape. It imitates the shape of the next workpiece surface, adheres, rolls, and separates. It is not limited by the surface shape, has good machining flexibility, and can polish the surface of any shape. Another feature is that because the magnetic line of force can pass through the object like X-rays, magnetic abrasive particles can enter the internal surface of any shape that ordinary tools cannot intervene, such as the mold cavity, the inside of the elbow, the small bottle neck container, etc. By changing the direction of the magnetic line of force by changing the external magnet, the magnetic abrasive particles can be controlled to grind the inner surface according to the specified trajectory, completing the fields that could not be machined in the past

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