Grinder chuck magnetizing and demagnetizing controller

A grinding machine suction cup, charging and demagnetization technology, applied in the direction of magnetic objects, grinding workpiece supports, electrical components, etc., can solve problems such as electric corrosion, easy heating of devices, and large output power of the H-bridge of the main circuit, so as to reduce manufacturing costs and reduce Power consumption requirements, the effect of good demagnetization effect

CN1887527AActive Publication Date: 2007-01-03西安鸣士机电开发有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2007-01-03

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Abstract

The grinder chuck magnetizing and demagnetizing controller has one main loop and one monolithic computer control loop. The main loop includes one H-bridge inverter circuit and two relays connected to the opposite angle of the H-bridge inverter circuit. During magnetizing, DC voltage is output through the relays, and during demagnetizing, the output is switched to the H-bridge inverter circuit and connected to the electromagnetic chuck. The control loop with monolithic computer controls the switching of the output voltage and the control of the output voltage amplitude. The present invention has rectifying bridge plus relay has high voltage fluctuation resistance, high antijamming capability, excellent demagnetizing effect, greatly lowered magnetizing power consumption and other advantages.
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Description

technical field

[0001] The invention relates to a charge and demagnetization controller, in particular to a charge and demagnetization controller for an electromagnetic chuck of a grinder. Background technique

[0002] Surface grinders usually use electromagnetic chucks to clamp the workpiece. In order to reliably attract and remove the workpiece conveniently, the design of the charge and demagnetization control circuit of the electromagnetic chuck is particularly important. The more advanced charge and demagnetization controller currently used in our country controls the magnitude of the voltage by controlling the trigger conduction of the thyristor, and completes the direction switching of the voltage by controlling the internal and external relays (or contactors), or through Four power tubes are bridge-connected to form the main circuit of the H-bridge inverter, which outputs a DC voltage with adjustable amplitude and direction, and performs non-contact output and is dire...

Examples

Embodiment Construction

[0016] The idea of ​​the technical solution of the present invention is: ① The magnetization of the grinding machine sucker is controlled by a single-chip microcomputer, the main circuit adopts a relay output, and the relay contacts are kept in a maintained state and switched infrequently, thereby avoiding electric erosion of the contacts. ②The demagnetization control is switched from the single-chip microcomputer to the demagnetization state, and the program determines the demagnetization cycle and demagnetization time that can meet the requirements according to the indicators of different chucks and the demagnetization curve requirements of different materials to achieve a good demagnetization effect. ③The circuit adopts single-chip PWM (Pulse-Width Modulation) mode to drive the H-bridge output demagnetization, and the demagnetization is completed within the specified time, which avoids the power tube being in the working state for a long time, thereby prolonging the life of t...