5.5　Roll Changing Device of Rolling Mill

5.5.1　The precondition for installing roll changing device of working roll and backup roll of rolling mill is to complete the installation and adjustment of mill housing，and the check is done and accepted.

5.5.2　Roll changing device installation for working roll and backup roll of rolling mill shall be in accordance with the following requirements:

1　Take the mill train centerline as a reference to measure the longitudinal centerline of roll changing rail of working roll.

2　Take the mill train centerline as a reference to measure the longitudinal centerline of roll changing car slide way of backup roll.

3　Take the elevation of roll changing rail inside the mill housing as a reference to measure and adjust the elevation of working roll rail and sliding rail of changing car of backup roll.

4　Levelness shall be measured on the roll changing orbital plane of rolling mill working roll and the slide way surface of roll changing car of backup roll.

5　The installation for the roll changing traversing hydraulic cylinder of working roll and the roll changing collecting and delivering hydraulic cylinder of backup roll shall meet the requirements of design documents.

5.5.3　The allowable deviation for roll changing devices of rolling mill working and backup rolls shall be in accordance with those specified in Table 5.5.3.

Table 5.5.3　Allowable deviation for roll changing devices of rolling mill working and backup rolls