Permanent magnet ferrite core forming quality control system

Abstract

The invention relates to a permanent magnetic ferrite core forming quality control system. The control system can well control the forming quality of a permanent magnetic ferrite core blank, the water content can be online detected in real time, detected data is free of lag, the performance is stable, the cost is low, and use is convenient. According to the technical scheme, the permanent magnetic ferrite forming quality control system comprises a press with a charging cavity, a conveying pipeline for conveying slurry to the charging cavity, a transmission mechanism for adjusting the capacity of the charging cavity, a water absorbing mechanism for absorbing water of the slurry in the charging cavity, a slicking mechanism for slicking redundant slurry on the top of the charging cavity, and a pressing mechanism for applying pressure to the slurry. The permanent magnetic ferrite core forming quality control system is characterized in that a probe type sensor is arranged on the conveying pipeline, the probe type sensor is inserted into the conveying pipeline in the radial direction, the probe type sensor is connected with a computer through a data acquisition controller, and the computer is connected with a PLC of the transmission mechanism and the press.

Description

technical field [0001] The invention relates to the technical field of permanent magnet material production, in particular to a permanent magnet ferrite core molding quality control system. Background technique [0002] The permanent magnet ferrite core is made by pressing the raw material slurry into a blank with a 100-500T hydraulic press, and then sintering, grinding and other processes. The process of pressing the blank consists of several interrelated actions such as filler----scraping----pressing----magnetization----water absorption----pressure holding----demolding and so on Coordinated completion, all actions in the pressing process are controllable, so the key factor affecting the quality of the blank is the water content of the slurry, which directly determines the molding density of the blank, thus determining the size of the final product, performance parameters. [0003] The current control of slurry is to test the water content by manual sampling and drying me...

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Problems solved by technology

[0003] The current control of slurry is to test the water content by manual sampling and drying method. Although the test results are relatively accurate, the process takes a long time (usually 2-3 hours), and has no practical guiding significance for production.

The second is to use a near-infrared online moisture detector, and its working principle is as follows: figure 1 As shown, the infrared laser diodes LD1~LDn emit infrared beams to irradiate the surface of the slurry, and then the photodetector detects the reflected light to obtain the water content data of the slurry. Although it realizes the online detection of the water content, it is expensive , can only detect the water content on the surface of the slurry, and the detection point is open, and can only detect the water content before the slurry enters the pipeline (in the mixing tank), and the detection data lags behind; due to the high solid density of the slurry, Deposition is easy to occur, once deposition occurs, the detected data will deviate greatly, if adjusted according to this result, it will cause damage to the tooling

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