Vacuum sintering furnace for neodymium iron boron magnet machining

Abstract

The invention discloses a vacuum sintering furnace for neodymium iron boron magnet machining. The furnace comprises a furnace body and an outer shell; the middle part of the inner side of the furnacebody is fixedly connected with a stirring shaft; the upper and lower sides of the stirring shaft are fixedly connected with fixed blocks; the outer sides of the fixed blocks are fixedly connected withstirring blades through bolts; the end parts of the stirring blades are fixedly connected with stirring rods; a furnace door is arranged at the right end of the furnace body; the outer side of the furnace body is fixedly connected with the outer shell; a rotating motor is fixedly mounted at the middle part of the left side of the outer shell; an output end of the rotating motor is fixedly connected with the stirring shaft; a cooling water pipe is wound on the outer side surface of the furnace body; and the cooling water pipe is connected with a water inlet pipe. The furnace is simple in structure, reasonable in design, more uniform in reaction in the furnace, high in reaction efficiency, higher in sintering efficiency and quality, capable of quickly dissipating heat and convenient to quickly discharge materials from the furnace, and can prolong the life through reduction the vibration in the vertical and horizontal directions.

Description

technical field [0001] The invention relates to a vacuum sintering furnace, in particular to a vacuum sintering furnace for processing NdFeB magnets. Background technique [0002] Neodymium magnets, also known as NdFeB magnets, are tetragonal crystals formed of neodymium, iron, and boron. The magnetic energy product of this magnet is greater than that of samarium-cobalt magnets. The magnets are now permanent magnets second only to absolute zero holmium magnets. It is also the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products, such as hard drives, mobile phones, earphones, and battery-powered tools. [0003] NdFeB magnets need to use a vacuum sintering furnace during the processing process. The stirring devices of modern vacuum sintering furnaces are generally placed vertically, resulting in gas stratification inside, uneven gas distribution, and sintering reaction efficiency that requires gas participation. In addition, during the s...

AI Technical Summary

Problems solved by technology

[0003] NdFeB magnets need to use a vacuum sintering furnace during the processing process. The stirring devices of modern vacuum sintering furnaces are generally placed vertically, resulting in gas stratification inside, uneven gas distribution, and sintering reaction efficiency that requires gas participation. In addition, during the sintering process, the furnace body is at a high temperature. After the sintering is completed, there is no effective cooling measure. If the furnace door is directly opened to cool down, it is easy to cause the reactants to encounter moisture and be oxidized by moisture. In addition, the sintering furnace with a stirring device lacks Shock absorbing measures, resulting in a decrease in the service life of the device

Images