Shibuya is actually shelling, which refers to the process of removing rice husks during rice processing, and the machinery used for rice shelling is called the glutinous rice machine. In the rice inspection, the relevant tests are often carried out, and often no such samples are needed. At the same time, in order to improve the accuracy of the test, the requirements for sample processing are relatively high. Therefore, in the experiment, the large-scale glutinous rice machine used in rice processing is not used. Instead, it uses a dedicated small-scale grain machine, which is also called the inspection of the Shibuya machine because it is mainly used for inspection experiments. Here's a brief introduction to this experiment works with hulling machine.

The inspection of the glutinous rice machine is based on the relative differential movement of two polyurethane rubber rollers, so that the rice husks are peeled off during the squeezing process, and the specific gravity and suspension speed of the husk and the brown rice are different, and the two are separated by controlling the wind speed. The chaff is inhaled into the chaff collection box, and the brown rice falls into the brown rice collection box. Shibuya rubber roller is the main accessory on the Shibuya machine and the key equipment for rice shelling. Different grain types of rice can be adjusted by adjusting the distance between the two rubber rollers to completely peel off the chaff. The wind speed is changed by adjusting the air volume of the air inlet of the fan to completely separate the rice shell. The instrument has the advantages of beautiful appearance, sturdy and durable, small size, light weight, simple operation, convenient carrying, stable performance, low noise and fast roughening.

The experiment uses the glutinous rice machine to meet the high requirements of rice unshelling in the test. The shelling rate of a glutinous rice is 97%, the shelling rate of the two glutinous grains is 100%, and the rice granules are separated from the oyster shell. And the rice grains are not broken, not hairy, and the various rice indexes according to the grades meet the requirements of the national new standards of GB1350-1999 and GB/T17891-1999. The instrument is currently widely used in grain, seed, agricultural food colleges, commodity inspection and scientific research and other grain departments to test the roughness of rice, the quality of rice, seed viability and rapid bud test shelling.

High Precision Machining

High Precision Machining is defined as a process of changing the dimensions or the performance of workpiece with machining facilities.

According to the temperature of the workpiece while in machining, high precision machining can be divided into cold working and hot working. Usually, machining under indoor temperature, and won't change cause chemical change or phisical phase change is named cold working. On the other hand, if under temperature, higher or lower than room temperature, which will lead to chemical changes or phase changes, it will be called as hot working.

For high precision machining, the machining tolerance can be up to 0.0001-0.001mm, the surface finish Ra can be 0.02-0.1um.

Machining precision is to describe the actual geometrical parameter of the part after machining, such as the size, the form, the position, comparing with the theoretical geometry parameter. The difference from these two parameters is the machining tolerance. The number of the difference show the machining accuracy, the bigger, the lower of the machining precision, the smaller, the higher machining precision.

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