Milling roller of flour mill, method for machining milling teeth on milling roller surface and use of milling roller

Abstract

The invention applies to the roller of flour mill, and the process method for grinding teeth of roller in mill for grinding corn, soybean and so on. The invention includes roller surface with silk teeth, the top is arc type surface, and the cross section of the top is arc type. The invention uses plasma or electric spark, or laser surface thermal process technology, processes the surface of the roller into arc type. The invention can upgrade the rigidity and wear resistance.

Description

technical field [0001] The present invention is suitable for grinding rollers of milling machines in the wheat flour milling industry, as well as in other industries such as grain, oil, food, feed, brewing, etc., for crushing and milling of agricultural and sideline products such as wheat, corn, soybeans, miscellaneous grains, and corn cobs. The processing method of the grinding roller surface of the mill and the application of the grinding roller. Background technique [0002] Flour mill is the most important host equipment in wheat flour mill, and the grinding roller (also called roll) is the most important part of the flour mill. According to the requirements of the process, the grinding rollers are divided into two categories: the ones with grooves on the surface of the rollers are called toothed rollers, which are used to peel off the wheat grains and scrape the endosperm particles; Grind finely to make flour. Either toothed roll or smooth roll. All must have good we...

AI Technical Summary

Problems solved by technology

However, when the new roller is used for a certain period of time, as the grinding teeth become blunt, the output will decrease significantly, the power consumption will increase sharply, and the crushing and scraping effect will decrease, resulting in an increase in the flour content of the bran, and a significant decrease in the number of wheat dregs and wheat hearts. Cause powder yield to decrease

Frequent replacement of grinding rollers will not only increase the cost of wire drawing, reduce the service life of grinding rollers and mills, increase workload, reduce the start-up rate, but more importantly, cause unstable production results

[0006] 2. Low unit flow rate

[0007] 3. The service life of grinding roller and mill is low

It can be seen that the equipment required for smooth roller processing has high precision, many types, large equipment investment, difficult processing, long time and high cost.

[0010] 2. The use of smooth roller grinding has higher requirements on the precision of the mill

Generally, small and medium-sized mills and old mills with low manufacturing precision are not suitable for grinding with smooth rollers, resulting in a particularly high total powder yield and a low powder yield for grade powder.

[0011] 3. The grinding efficiency of smooth roller is low

Due to the low roughness of the surface of the smooth roller, not only the powder extraction rate is low and the power consumption is high during grinding, but also it is easy to cause material accumulation in the grinding mouth, which not only affects the output and grinding effect, but if the operation is improper, it will easily cause system blockage, thus affecting normal production

[0012] 4. Using smooth roller grinding, the energy consumption per unit product is high

Therefore, additional equipment, power equipment and energy consumption are added; the unit flow rate and powder extraction rate of the smooth roller are low, and the number of grinding passes required is large, which increases equipment, power equipment and energy consumption accordingly

[0013] 5. The use of smooth roller grinding, high investment in plant construction

Due to the large number of grinding channels required for smooth roller grinding, the large proportion and quantity of equipment allocation, and the large number of auxiliary equipment, the investment in equipment and workshops is relatively high when building or rebuilding a factory

[0014] 6. Grinding with smooth rollers will affect the edible quality and nutritional value of flour

[0015] Therefore, the use of conventional grinding rollers without plasma high-temperature heat treatment not only affects many economic and technical indicators such as the output of the mill, powder yield, energy consumption, service life of the grinding roller and mill, and equipment start-up rate, but also affects Edible quality and nutritional value of flour and investment in factory construction

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