The quality of the roller skin of the briquetting machine directly determines the service life of the briquetting machine. The hardness of the roller skin is the most important parameter to measure the quality of the roller skin of the briquetting machine. The hardness of the roller skin depends on the alloy steel grade selected for the roller skin and the final level of heat treatment process.
The production process of the roller skin of the ball press
Firstly, the blank is made according to the drawing of the roll skin, and then processed by turning, so that all sides are clean and eight sides are smooth. The next step is to carve the ball socket on the circumference of the roller skin. Of course, the size and shape of the ball socket need to be determined according to the diameter of the roller skin and the pressed material and other factors. The latter process is heat treatment, which is also the most critical process. In the case of the same raw material of the roll skin, the hardness of the roll skin is determined by the heat treatment.
Ball press roller skins can be divided into two types in terms of technology: casting and forging. The commonly used steel grade for casting roll skin is 65 manganese alloy, the cost is relatively low, but the hardness of the roll skin is not too high, not very wear-resistant, suitable for pressing fine materials such as coal powder and clay. The commonly used steel grade for forging roller skins is 92 chromium molybdenum, which is relatively high in price and cost, but the hardness of the made roller skins is also relatively high, which can reach above HRC62, and is suitable for pressing rough materials such as iron powder and metal ore powder.
1. The material of the roller skin of the briquetting machine
The material of the roller skin of the briquetting machine is divided into 65 manganese, 9 chromium and 2 molybdenum, high chromium alloy and so on. When pressing different materials, different roller skins should be selected: 65 manganese roller skins are more popular and belong to steel castings with low cost. , can suppress coal powder, coke powder, charcoal powder and other materials; 9 chromium 2 molybdenum, high chromium alloy briquette machine pressure rollers are forged parts, mainly used in medium and large briquette briquetting machines with high output, and can be used to suppress ore powder, iron concentrate powder, magnesium oxide powder, laterite nickel ore, etc.
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