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Rolling is an important part of metal processing. Different rolling processing equipment and molds are used for different rolling processes. Double-line rolling mill and double-line groove are two commonly used equipment in rolling processing. In this paper, the principle, characteristics and differences of double-line rolling mill and double-line groove are discussed.
The so-called double-line rolling mill is a rolling equipment that has two working lines. It is composed of active upper rolls and driven lower rolls, and the upper rolls are driven by two motors through a reducer. Generally two working groups of double-line rolling mill are symmetrical above and below the center line of the rolling mill. The symmetrical rolling is more uniform in force, and the rolling bars in the both sides of the rolling mill can interact with each other to vibrate and reduce the roughness of the rolling surface. The double-line rolling mill is mainly used for rolling grooves, small round and profile steel, and it has the advantages of large rolling force, good surface roughness and high precision.
The double-line groove is a kind of grooving processing equipment with double working lines, which is mainly used for grooving the surface of steel bars. The double-line groove is composed of two sets of upper and lower grooves, and the upper grooves are driven by two motors in reverse. The working lines of double-line groove are also symmetrical, and the groove precision is high. The symmetrical grooving can reduce the unilateral cutting force and the vibration in the cutting process, so as to improve the surface roughness of the groove. The double-line groove can be used for grooving steel bars such as a variety of small round and profile steel.
The main difference between double-line rolling mill and double-line groove is the object of processing: double-line rolling mill is mainly used for rolling grooves, small round and profile steel, while double-line groove is mainly used for grooving steel bars such as a variety of small round and profile steel. Another difference is the working principle: The upper rolls of the double-line rolling mill are driven by two motors in the same direction, while the upper grooves of the double-line groove are driven by two motors in reverse.
To sum up, double-line rolling mill and double-line groove are two commonly used equipment in rolling processing, and the two equipment have their own characteristics and differences. According to the application requirements, the appropriate equipment should be used reasonably in the metal processing.
