5.3　Mill Roll Adjusting Device

General item

5.3.1　The backlash，tip clearance，gear engagement contact area，axial drifting of the gear drive and worm drive reducer shall meet the requirements of the 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.Each part of reducer shall be tightened enough.

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.

5.3.2　Radial displacement of two axle centers，inclination of two axial lines and end clearances during coupling assembling 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:total number inspection.

Inspection method:observation，inspect with dial indicator and feeler gauge.

5.3.3　Adjusting devices of transverse wedge and vertical wedge shall be with tighten plane and keep flexibility of adjusting.Bearing seat contact face elevation at both operation and driving sides shall be consistent.

Inspection quantity:total number inspection.

Inspection method:observation and inspect with feeler gauge and level.

5.3.4　The gap between depressed screw rod and nut shall be in accordance with the requirements of design documents.

Inspection quantity:total number inspection.

Inspection method:observation and inspect with dial indicator.

5.3.5　The allowable installation deviation of mill roller adjusting device shall be in accordance with those specified in table 5.3.5.

Inspection quantity:total number inspection.

Inspection method:it should be in accordance with those specified in table 5.3.5.

Table 5.3.5　Allowable installation deviation of mill roller adjusting device