5.5　Roll Changing Device

General item

5.5.1　The contact between rail/slide rail and packer/foundation embedded parts shall be close and the bolt fastening force shall meet the requirements of design documents.

Inspection quantity:20% sampling inspection and not less than 4 positions.

Inspection method:observe，inspect with feeler gauge and beat nut with little hammer.

5.5.2　The engagement accuracy of gear and gear rack shall meet the requirements of design documents.If there is no requirement from the design，it shall meet the requirements of current national standard，i.e.，General code for construction and acceptance of mechanical equipment installation engineering GB 50231.

Inspection quantity:30% sampling inspection and not less than 1 set.

Inspection method:check the installation and quality record；inspect with coloring，pressing lead wire，micrometer gauge and feeler gauge.Check the joints of adjacent gear racks with tooth block.

5.5.3　The allowable installation deviation of rack-type roll changing device shall be in accordance with those specified in table 5.5.3.

Inspection quantity:total number inspection.

Inspection method:it should be in accordance with those specified in table 5.5.3.

Table 5.5.3　Allowable installation deviation of rack-type roll changing device

Table 5.5.3（Continued）

5.5.4　The allowable installation deviation of hydraulic cylinder cross sliding type roll changing device shall be in accordance with those specified in table 5.5.4.

Inspection quantity:total number inspection.

Inspection method:it should be in accordance with those specified in table 5.5.4.

Table 5.5.4　Allowable installation deviation of hydraulic cylinder cross sliding type roll changing device

Table 5.5.4（Continued）