Polishing machine tool and constant-pressure device thereof

Abstract

The invention discloses a constant-pressure device of a polishing machine tool. The constant-pressure device comprises a sealed gas cylinder and a polishing module which is in contact with a polishingworkpiece and can vertically move, wherein a piston platform is arranged in the gas cylinder; the piston platform can vertically move in the gas cylinder, is connected with the polishing module through a connector to transmit tensile force; a through hole for allowing the connector to pass through is formed in the gas cylinder; a gas outlet of the gas cylinder is used for stably discharging gas;a gas inlet of the gas cylinder is equipped with an inlet adjustable pressure-stabilizing valve; and the inlet adjustable pressure-stabilizing valve adjusts gas inlet amount according to the positionof the piston platform, so that pressure in the gas cylinder is kept constant. Real-time automatic compensation for contact pressure is realized through gas pressure change rule, so that constant-pressure polishing is realized, the polishing process for the workpiece is improved, the structure is simple, the control process is simplified, influences, on polishing, of a complex structure are reduced, and problems such as low workpiece polishing precision and a great rejection rate caused by conventional manual polishing equipment operation are avoided. The invention further discloses the polishing machine tool comprising the constant-pressure device.

Description

technical field [0001] The invention relates to the field of processing machine tools, in particular to a constant pressure device of a polishing machine tool. In addition, the present invention also relates to a polishing machine tool comprising the above-mentioned constant pressure device. Background technique [0002] At present, all kinds of optical systems play an irreplaceable role in military and civilian fields, and the increasingly prominent important role makes the optical system have higher and higher requirements for the accuracy of optical components. In the field of ultra-precision machining, the workpiece to be polished is placed on the rotating shaft, the polishing pen contacts the workpiece, and the rotating shaft drives the workpiece to rotate for polishing. Therefore, whether the pressure between the workpiece and the polishing pen is constant will seriously affect the optical performance of the polished workpiece. [0003] In the traditional processing o...

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Problems solved by technology

[0004] However, the above polishing method needs to use a pressure sensor to detect the pressure change in the polishing process, and then perform feedback control according to the pressure value, which not only increases the difficulty of the operation, but also has a certain time delay due to the feedback through the pressure sensor. Generate data errors, and greatly increase the cost of the equipment, and make the structure of the polishing machine more complicated

At the same time, the processing method of traditional manual operation equipment brings the problem that the polishing accuracy cannot be guaranteed and the scrap rate is high.

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