Device of neodymium iron boron automatic suppressing orientation forming and method

Abstract

The invention discloses a device of neodymium iron boron automatic suppressing orientation forming. The device of the neodymium iron boron automatic suppressing orientation forming comprises a fixed mould, a movable mould, an electromagnet and a magnet exciting coil. The fixing mould comprises a metal mould sleeve and a rubber mould arranged in the metal mould sleeve. The movable mould comprises a steel upper pressing head and a rubber upper pressing head fixed below the steel upper pressing head. A method is further provided at the same time. The method includes the following steps that the rubber upper pressing head drops when the upper end surface of the rubber mould is filled by magnetic powder. An orientation magnetic field drops to zero when density of a magnet blank meets the requirement. A demagnetization magnetic field is provided and the demagnetization magnetic field drops to zero. Production cost is reduced. Demoulding is simple. Pressure can be improved when the device of neodymium iron boron automatic suppressing orientation forming is pressed. The problem of demoulding is not needed to be worried about. The prior isostatic pressing process can be achieved at the same time when the device of neodymium iron boron automatic suppressing orientation forming is pressed. Two steps of the existing technology on the same platform device are achieved. Production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a device and method for automatic pressing and orientation molding of NdFeB. Background technique [0002] The existing domestic NdFeB pressing and orientation forming is all metal mold forming, and then the blank is put into the latex sleeve and then sent to isostatic pressing. Since the friction between the metal mold and the magnet will increase greatly with the increase of the magnet density, resulting in It is more difficult to demould, so it needs to go through a mold release agent, otherwise the mold will be easily damaged. Mold release agent must be sprayed before each work, and then the mold cavity must be cleaned frequently, otherwise the product is easy to crack. Moreover, in the production process, one person often weighs the material, one person adds the material, and one person puts the blank into latex gloves, and then sends it to isostatic pressing, and then to sintering. Most factories use this method to carry...

AI Technical Summary

Problems solved by technology

Moreover, in the production process, one person often weighs the material, one person adds the material, and one person puts the blank into latex gloves, and then sends it to isostatic pressing, and then to sintering. Most factories use this method to carry out orientation molding of NdFeB magnets. Suppression, this process takes a lot of manpower and time

[0003] The real NdFeB automatic pressing and orientation molding press should input magnetic powder and output blanks that can be directly sent to the sintering furnace. The whole process does not require manual operation, and the entire pressing process should be carried out under the protection of high-purity nitrogen. Requirements At present, there is no one press in China to meet the requirements

Images