The adjustment device of the upper roller of a rolling mill can be divided into three types according to its structure and control mode.
The first type is the mechanical adjustment device. This type of device adopts the mechanical drive mode. The transmission mechanism is mainly composed of a crank, a cam, a screw, a nut and a driving wheel. The driving wheel is connected with the adjuster. By rotating the adjuster, the movement of the upper roller is realized so that the rolling force of the rolling mill is adjusted. The mechanical adjustment device can be divided into two types: the manual adjustment device and the semi-automatic adjustment device. The manual adjustment device adopts the adjustment of the manual adjusting wheel to adjust the position of the upper roller. The semi-automatic adjustment device has the function setting of its own lower limit, and the automatic operation control process is arranged after setting, thus accurately controlling the position of the upper roller.
The second type is the hydraulic adjustment device. This type of device mainly controls the upper roller by adjusting the pressure of the hydraulic oil. The medium of transmission is oily fluid. By controlling the quantity and pressure of the oil, the movement of the upper roller is realized to adjust the rolling force. According to the availability of the main system, it can be divided into two types: stand-alone type and integrated type. The stand-alone type is an independent system. It is convenient to use, safe and reliable. The integrated type is more widely used. Its control system is installed on the rolling machine, and it is also convenient to adjust.
The third type is the electric adjustment device. This type of device controls the upper roller by adjusting the electrical coil. Its transmission medium is electrical signal, which is transmitted through the control circuit. The motor is used to control the upper roller. The motor rotates according to the signal, and the upper roller moves as required. The electric adjustment device has the advantages of high precision and fast speed.
To sum up, the three types of adjustment devices of the upper roller of a rolling mill have their own advantages and disadvantages. It is necessary to choose the appropriate adjustment device according to the specific needs.
