Positioning rotary clamp for precise grinding of quartz nozzle

Abstract

The invention relates to a positioning rotary clamp for precise grinding of a quartz nozzle, and belongs to the field of precise machining of quartz materials. The positioning rotary clamp comprises a rack, a working table, a clamping and rotating mechanism, an aligning mechanism, a peeping support and a microscope. The working table is arranged at the top of the rack; the clamping and rotating mechanism comprises a motor, a bearing and a three-jaw chuck; the three-jaw chuck is fixedly arranged on an output shaft of the motor through the bearing; the motor is fixedly located at the bottom of the working table, and the three-jaw chuck is located on the working table; the aligning mechanism comprises a pressing ring, a fixed seat ring and an aligning ring; three aligning screws are uniformly distributed on the circumference of the aligning ring; the fixed seat ring is coaxially positioned in the aligning ring and is fixed by the three aligning screws; and the pressing ring is arranged on the axial end face of the fixed seat ring, and the pressing ring and the fixed seat ring are axially and fixedly connected through a screw. According to the positioning rotary clamp, nozzle hole diameter micron-level machining of the quartz nozzle is rapidly completed with high quality, the grinding time is shortened by 3-5 hours, the rejection rate is reduced by 50%, and the concentricity error of a nozzle hole reaches phi 0.05 mm.

Description

technical field [0001] The invention belongs to the field of precision machining of quartz materials, in particular to a positioning and rotating fixture for precision grinding of quartz nozzles. Background technique [0002] The quartz nozzle plays one of the key parts of the core technology in the catalytic and combustion experimental device. For example, the 201711000868.1 Chinese patent invented by Yang Jiuzhong et al. discloses "An in-situ detection device for gas-phase intermediate products of catalytic reactions with different diffusion distances". The sampling cone at the lower part of the ionization chamber described in the device is made of quartz material. The center hole is made by grinding. The device is used in a low-pressure reaction system. The described quartz nozzle has a large aperture, about Φ0.5 mm to Φ1.0 mm, and is made by rough manual grinding with low precision. At the same time, each time such a quartz nozzle is ground and processed, it is ground ...

AI Technical Summary

Problems solved by technology

The device is used in a low-pressure reaction system. The quartz nozzle described has a large aperture, about Φ0.5 mm to Φ1.0 mm, and is made of rough manual grinding with low precision.

At the same time, each time the quartz nozzle is ground and processed, it is ground in one area, and the microscope observation is another area after cleaning. The process is complicated and cumbersome.

It takes 6-10 hours to process such a quartz nozzle, which is not only time-consuming to operate, but also prone to waste products

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