Main characteristics of magnetic abrasive finishing

(1) The influence of magnetic field intensity. The Magnetic flux density in the machining gap can be controlled by changing the excitation voltage. When the excitation voltage is constant, the force on the magnetic abrasive is proportional to the square of Magnetic flux density. Increasing the Magnetic flux density in the machining gap can effectively improve the efficiency of grinding and polishing. Therefore, the excitation voltage should be correctly selected. The voltage value should be reasonably selected based on the size, material, and surface roughness requirements of the workpiece. General Bold

Choose a higher magnetic field intensity for work.

(2) The impact of machining gaps. When the magnetic abrasive, workpiece speed, and excitation voltage are constant, the size of the machining gap should be correctly selected. The experimental results and theoretical analysis prove that the Magnetic flux density will decrease with the increase of machining gap; When the machining gap is small, the Magnetic flux density is large. During rough machining, the machining gap should be selected as small as possible; During precision machining, the machining gap should be chosen to be large. The value of machining gap size should be determined based on specific machining requirements.

(3) The influence of magnetic pole shape. In order to work effectively and reliably, it is necessary to design the shape of the magnetic poles correctly. If the central part of the magnetic pole is an arc, it is not easy for the central part to store magnetic abrasive particles, and the central part has no grinding effect, reducing the utilization rate of the magnetic pole. If a slot is made in the center of the magnetic pole arc, the force state of the magnetic abrasive will change, causing the central part to concentrate magnetic abrasive particles and improving the utilization rate of the magnetic pole. At the same time, the design of the magnetic pole shape should make the magnetic abrasive subject to greater magnetic field force in the processing gap, thereby improving the processing efficiency of magnetic abrasive grinding.

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