Polishing system based on the non-newton fluid and polishing method thereof

Abstract

A polishing system based on a non-Newtonian fluid and a polishing method thereof are provided. The polishing system includes a polishing device, a non-Newtonian fluid auxiliary device and a control device. The polishing device is able to move a work piece in a polishing container containing the non-Newtonian fluid with abrasives that cause the polishing action. The non-Newtonian fluid auxiliary device is able to manipulate the viscosity of the non-Newtonian fluid by varying the pressure, speed, vibration or ultrasonic frequency, which causes the abrasives to polish the work piece. The control device is used to optimize the polishing process by controlling how the polishing device moves the work piece inside the polishing container. In this way, by using the polishing method, the polishing system provided is able to polish a work piece with any three-dimensional shape.

What is claimed is: 
     
         1 . A polishing system based on a non-Newtonian fluid, comprising:
 a polishing device configured to move a work piece in a polishing container containing the non-Newtonian fluid, the non-Newtonian fluid comprising abrasives;   a non-Newtonian fluid auxiliary device configured to manipulate viscosity of the non-Newtonian fluid through variation in pressure or speed thereof, or through variation in vibration or ultrasonic frequency applied thereto, such that the work piece is polished by the abrasives; and   a control device configured to control the polishing device to move the work piece inside the polishing container;   wherein when the non-Newtonian fluid auxiliary device is in operation, the viscosity of the non-Newtonian fluid increases, resulting in characteristics resembling those of a semi-solid substance; and when the non-Newtonian fluid auxiliary device is not in operation, the non-Newtonian fluid quickly reverts to liquid-like state.   
     
     
         2 . The polishing system based on the non-Newtonian fluid of  claim 1 , wherein the non-Newtonian fluid is made of biodegradable materials and apparent viscosity of the non-Newtonian fluid is between 20 kPa·s and 100 kPa·s. 
     
     
         3 . The polishing system based on the non-Newtonian fluid of  claim 1 , further comprising a polishing fluid circulation device, itself comprising the polishing container, a drainage module, a cleaning module, and a fluid feeding module, wherein the drainage module is connected with the polishing container to discharge the non-Newtonian fluid from the polishing container; the cleaning module is installed in the polishing container to clean the polishing container and the work piece before or after polishing; and the fluid feeding module is connected with the polishing container to supply the non-Newtonian fluid to the polishing container. 
     
     
         4 . The polishing system based on the non-Newtonian fluid of  claim 1 , further comprising a measuring device, itself comprising a fluid level measuring module, a viscosity measuring module, a temperature measuring module, a flow rate and velocity measuring module, and a pressure measuring module, wherein the fluid level measuring module measures a level of the non-Newtonian fluid in the polishing container; the viscosity measuring module measures the viscosity of the non-Newtonian fluid in the polishing container; the temperature measuring module measures temperature of the non-Newtonian fluid in the polishing container; the flow rate and velocity measuring module measures flow rate and velocity of the non-Newtonian fluid in the polishing container; and the pressure measuring module measures the pressure of the non-Newtonian fluid in the polishing container. 
     
     
         5 . The polishing system based on the non-Newtonian fluid of  claim 1 , wherein the polishing device comprises a shaft and a holding tool, the shaft has a plurality of degrees of freedom in movement thereof; the holding tool is rotatably connected with the shaft; the holding tool is configured to hold the work piece; and the control device is configured to control rotating speed and the movement of the shaft, as well as rotating speed and the angle of the holding tool. 
     
     
         6 . A polishing method based on a non-Newtonian fluid, comprising the following steps:
 providing a polishing container containing the non-Newtonian fluid, wherein the non-Newtonian fluid comprising abrasives;   using a polishing device to hold a work piece and to place the work piece in the polishing container containing the non-Newtonian fluid;   providing a non-Newtonian fluid auxiliary device, to manipulate viscosity of the non-Newtonian fluid through variation in pressure or speed thereof, or through variation in vibration or ultrasonic frequency applied thereto; and   using a control device to control the polishing device to move the work piece inside the polishing container, such that the abrasives polish the work piece;   wherein when the non-Newtonian fluid auxiliary device is in operation, the viscosity of the non-Newtonian fluid increases, resulting in characteristics resembling those of a semi-solid substance; and when the non-Newtonian fluid auxiliary device is not in operation, the non-Newtonian fluid quickly reverts to liquid-like state.   
     
     
         7 . The polishing method based on the non-Newtonian fluid of  claim 6 , further comprising the following steps:
 making the non-Newtonian fluid from biodegradable materials, wherein apparent viscosity of the non-Newtonian fluid is between 20 kPa·s and 100 kPa·s.   
     
     
         8 . The polishing method based on the non-Newtonian fluid of  claim 6 , further comprising the following steps:
 connecting a drainage module to the polishing container to discharge the non-Newtonian fluid from the polishing container;   installing a cleaning module in the polishing container to clean the polishing container and the work piece before or after polishing; and   connecting a fluid feeding module to the polishing container to supply the non-Newtonian fluid to the polishing container.   
     
     
         9 . The polishing method based on the non-Newtonian fluid of  claim 6 , further comprising the following steps:
 measuring a level of the non-Newtonian fluid in the polishing container, so that the level of the non-Newtonian fluid in the polishing container corresponds to the work piece;   measuring the viscosity of the non-Newtonian fluid in the polishing container;   measuring temperature of the non-Newtonian fluid in the polishing container;   measuring flow rate and velocity of the non-Newtonian fluid in the polishing container; and   measuring pressure of the non-Newtonian fluid in the polishing container.   
     
     
         10 . The polishing method based on the non-Newtonian fluid of  claim 6 , further comprising the following steps:
 providing a shaft having a plurality of degrees of freedom in movement thereof;   connecting a holding tool to the shaft, wherein the holding tool is rotatably connected to the shaft;   using the holding tool to hold the work piece;   employing the control device to control rotating speed and movement of the shaft; and   employing the control device to control rotating speed and angle of the holding tool.