Pressing device and method of full-automatic magnetic powder molding press

Abstract

The invention discloses a pressing device and method of a full-automatic magnetic powder molding press. The pressing device comprises a pressure rack, wherein two ends of the pressure rack are respectively a rack top plate and a rack tabletop plate; the pressing device further comprises an upper mold trace releasing pressure retention device, a lower mold device and a guide column frame transmission mechanism; the upper mold trace releasing pressure retention device comprises an upper template and a pressure retention mounting module; the upper template is provided with an upper template cavity with a downward opening; a sensor is arranged in the upper template cavity; the pressure retention mounting module is provided with a steplike cavity which runs through in the vertical direction; a mounting plate is encapsulated at the lower part of the steplike cavity; and a guide mandril and a spring are embedded in the steplike cavity in a sliding manner. The pressing device of the full-automatic magnetic powder molding press realizes real-time monitoring and control for the whole molding process of a magnet blank; and when the pressing device is applied to a magnet blank manufacturing method provided by the invention, the springback tension in the magnetic blank can be effectively reduced or eliminated, so that the molding qualification rate of the magnet blank is increased.

Description

technical field [0001] The invention belongs to the technical field of magnetic powder molding, and in particular relates to a pressing device and method of a fully automatic magnetic powder molding press. Background technique [0002] The pressing device of the automatic magnetic powder powder molding press is mainly used to press the magnetic powder into a magnet blank; in recent years, various rare earth NdFeS powders are pressed, sintered, sliced, and ground in a specific magnetic field to produce crystalline rare earth alloys. Oriented magnets are widely used in motors in the motor field, speakers in the electro-acoustic industry, and other electrical devices such as automobiles, and the link of magnet blank pressing and manufacturing is particularly important; in order to achieve precision molding of magnet blanks, the problems that must be solved Yes: In the process of magnetic powder pressing, in order to reduce or eliminate the rebound tension inside the pressed mag...

AI Technical Summary

Problems solved by technology

Due to the small diameter of the magnetic powder particles and the relatively narrow distribution range of the grain diameter, after the magnet blank made by the ordinary pressing production method is out of the mold, springback tension will be generated inside the magnet blank; or due to springback The tension is released too quickly, and the particle density is inconsistent, resulting in uneven density, which makes the magnet blank have hidden dangers of internal cracks; the biggest disadvantage is: the qualified rate of the pressed magnet blank is low (easy to crack and scrap); The molded magnet blank has hidden dangers of cracks due to the inconsistent density of internal particles, and it is easy to crack and be scrapped during sintering; the finished product made of it seriously affects the overall magnetic performance of the magnet due to the uneven internal density, and the quality of magnetic energy cannot be guaranteed. increase manufacturing cost

"However, this document only briefly introduces the structure of the mold device and the manufacturing method of the magnet. For the aforementioned problems that must be solved, "in the process of magnetic powder pressing, in order to reduce or eliminate the internal springback of the pressed magnet blank body Tension requires a device that can automatically control the system pressure, accurately measure and display pressure data and set working parameters, and produce a magnet blank with compact internal magnetic powder particles and uniform density through the setting method of pressing-holding-pressure release, The article did not make a precise and rigorous elaboration

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