Magneto-rheological liquid circulation system of magneto-rheological polishing machine tool

Abstract

The invention discloses a magneto-rheological liquid circulation system of a magneto-rheological polishing machine tool. The magneto-rheological liquid circulation system comprises a liquid storage tank, a first peristaltic pump and a reducing back pressure pipeline. One end of the first peristaltic pump is connected with the liquid storage tank, and the other end of the first peristaltic pump is connected with the reducing back pressure pipeline. The tail end of the reducing back pressure pipeline is connected with a nozzle, and the nozzle is aligned with a polishing wheel. A pulse damper is arranged in the reducing back pressure pipeline, and the pipe diameter of the reducing back pressure pipeline is gradually reduced and then is gradually increased. The pulse damper is used for eliminating large-scale flow fluctuation, the reducing back pressure pipeline is used for further eliminating small-scale magneto-rheological flow pulses, magneto-rheological liquid flow can be stable, and very high control precision is also achieved even in the low-flow work condition.

Description

technical field [0001] The invention relates to the technical field of optical processing, in particular to a magnetorheological fluid circulation system for a magnetorheological polishing machine tool. Background technique [0002] As a new type of advanced optical manufacturing technology, magnetorheological polishing technology has a series of incomparable advantages such as high efficiency, high precision, high surface quality, small subsurface damage, and small surface residual stress, and has a good application The prospect can make a breakthrough in the manufacturing level and production efficiency of optical enterprises. Magneto-rheological polishing technology is widely used in the processing of continuous phase plate components, low-defect surface processing, high-efficiency surface error convergence and ultra-smooth surface processing. [0003] The magnetorheological fluid circulation system is a key component of the magnetorheological polishing machine tool. Its...

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Problems solved by technology

The deficiencies in the configuration of the magnetorheological fluid circulation system above are as follows: 1) Since the liquid output flow rate of the centrifugal pump is very sensitive to the height difference between the liquid inlet and the liquid outlet, a small change in the height difference will cause a large fluctuation in the flow rate, However, in the processing of magnetorheological machine tools, the height of the polishing wheel will change continuously, which will cause the flow rate of magnetorheological fluid output by the centrifugal pump to change continuously; There are still fluctuations. Although the magnetorheological machine tool uses a magnetic flow valve to control the output flow, it still cannot completely solve the above problems. The flow fluctuation is still maintained between 10 and 40ml / min during the actual operation of the machine tool.

When the magnetorheological machine tool is working at a large flow rate, the relative error of the above deviation is small, and the magnetorheological removal function can still maintain stability, ensuring that the polishing has a high convergence accuracy; but when the magnetorheological machine tool is used to process small structural components For example, when a continuous phase plate element with a complex configuration needs a very small removal function, it is necessary to control the flow rate of the circulation system at a low flow rate (flow rate <400ml / min). At this time, the magnetorheological fluid with a traditional configuration Circulation system, the flow control accuracy is difficult to meet the requirements, resulting in irregular shape of the removal function and large fluctuations in removal efficiency, which affects the accuracy and efficiency of magnetorheological processing

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