6.4　Inspection and Acceptance of Machine Frame

Ⅰ　Main Control Items

6.4.1　The tightening moment of fixing bolt of machine frame shall conform to the specifications of design document.

Number of examination:All the items are examined.

Method of inspection:Examine the record of tightening the bolt.

6.4.2　The prestress of column of machine frame shall meet the specifications of design document.

Number of examination:All the items are examined.

Method of inspection:Examine the prestress tensioning record of column.

Ⅱ　General Items

6.4.3　The tightening moment of slide plate of guide rail and bolt of machine frame shall meet the specifications of design document.

Number of examination:All the items are examined.

Method of inspection:Adopt the torque wrench.

6.4.4　The permissible variation of installation of machine frame shall conform to the specifications of Table 6.4.4.

Table 6.4.4　Permissible variation of installation of machine frame of punching/expanding machine

Number of examination:All the items are examined.

Method of Inspection:It is necessary to meet the relevant specifications of Table 6.4.4.

6.4.5　The measurement method drawing of main machine frame of punching/expanding machine（Figure 6.4.5）.

Figure 6.4.5　Measurement method drawing of main machine frame of punching and expanding machine

1-Precision leveling instrument，2-Water level gage，3-Plumb line for measurement，4-Plumb bob，x，y-Measurement of verticality of x，y directions of column of machine frame，H（average 1/3 subsection of full length of H1-H3 columns）-Measurement range and distance between the measurement points of verticality of column of machine frame，b（Measurement point of average 1/3 subsection of full length of b1-b4 columns）-Measurement of verticality of measurement point