Thickness difference
From：
Gaoming Foundation Date：12-22 3554 Belong to：Cold rolling knowledge
Defect Name: thickness nonconformity < br / > definition and appearance: < br / > if the actual thickness of the steel strip exceeds the allowable deviation specified in the standard, it is called thickness nonconformity. There are two kinds of thickness: ultra-thin and ultra thick& nbsp; 
< Br / > causes: < br / > ● unreasonable rolling thickness setting< Br / > ● the fluctuation of raw material thickness exceeds the controllable range of rolling mill thickness, which makes the rolling mill unable to carry out automatic thickness control< Br / > ● the measured value of thickness gauge is inaccurate, AGC function is abnormal or not put into operation< Br / > ● the steel strip at the inlet of the rolling mill has serious defects and cannot be rolled in the normal way, but special measures are taken, such as lifting the roll gap through the rolling mill, changing the set value of the thickness at the outlet of the rolling mill, etc< Br / > hazards: < br / > may damage the customer's stamping die or crack< Br / > prevention and elimination methods: < br / > ● set the rolling thickness as required, And pay attention to the thinning amount (leveling) and thickening amount in the production process of the subsequent process (galvanizing); < br / > ● ensure the thickness tolerance of raw materials; < br / > ● calibrate the thickness gauge and clean the thickness gauge window as required to ensure the normal operation of the thickness gauge and AGC Functions; < br / > ● ensure the surface quality and weld quality of the steel strip at the inlet of the rolling mill. < br / > inspection and judgment: < br / > ● measure the thickness of the steel strip with a measuring tool according to the measuring parts specified in the standard, and the thickness shall not exceed the allowable deviation Difference, for the steel strip beyond the thickness deviation range, it is allowed to change the judgment< br/>
< Br / > causes: < br / > ● unreasonable rolling thickness setting< Br / > ● the fluctuation of raw material thickness exceeds the controllable range of rolling mill thickness, which makes the rolling mill unable to carry out automatic thickness control< Br / > ● the measured value of thickness gauge is inaccurate, AGC function is abnormal or not put into operation< Br / > ● the steel strip at the inlet of the rolling mill has serious defects and cannot be rolled in the normal way, but special measures are taken, such as lifting the roll gap through the rolling mill, changing the set value of the thickness at the outlet of the rolling mill, etc< Br / > hazards: < br / > may damage the customer's stamping die or crack< Br / > prevention and elimination methods: < br / > ● set the rolling thickness as required, And pay attention to the thinning amount (leveling) and thickening amount in the production process of the subsequent process (galvanizing); < br / > ● ensure the thickness tolerance of raw materials; < br / > ● calibrate the thickness gauge and clean the thickness gauge window as required to ensure the normal operation of the thickness gauge and AGC Functions; < br / > ● ensure the surface quality and weld quality of the steel strip at the inlet of the rolling mill. < br / > inspection and judgment: < br / > ● measure the thickness of the steel strip with a measuring tool according to the measuring parts specified in the standard, and the thickness shall not exceed the allowable deviation Difference, for the steel strip beyond the thickness deviation range, it is allowed to change the judgment< br/>
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