Following defects are not acceptable :casting defects such as crack,sand hole,air blister,shrinkage,etc;technology defects such as burr,casting head,scale,etc;defects which affect the normal use such as cold shut,production of dross,penetrating pore,etc.
There are three steps which are casting,rough machining,finish machining for making clamping plate.Two times tempering should be done in the whole manufacturing process,the first time is after rough casting,the second time is after rough machining.Enough
aging treatment and relieving of internal stress should be done after casting,technical slope 2°30′.
In addition to above requirements,the casting manufacturing is according to standard JB/T7974-1999,authentication is according to national standard GB4986-85,dimension and tolerance is according to the requirements in the drawings.Refer the relevant standard if any of above standards is replaced, undeclared leaner tolerance is according to GB/T1804-2000,grade m.
平板非工作面涂防銹底漆，面漆為藍色，工作表面涂防銹油；
Plate non-working surface should be coated by rust inhibiting primer,finishing coat in blue,working surface should be coated by rust preventive oil.
平板安裝采用彈簧阻尼隔震系統；
The clamping plate is installed on air springs vibration isolation system.
