Sampling method for improving alloy quality inspection sampling representativeness
A quality inspection and representative technology, applied in the direction of sampling devices, etc., can solve problems such as insufficient randomness of package selection, economic loss of enterprises, and poor sampling representativeness, so as to improve the management level of sampling inspection, protect legitimate interests, and prevent violations Effect
Inactive Publication Date: 2020-08-21
YANCHENG LIANXIN IRON & STEEL CO LTD
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Problems solved by technology
The purchased alloy raw materials are packaged in tons of bags, and the existing incoming quality inspections are manual bag selection and sampling inspections. Manual bag selection is interfered by human factors, the randomness of bag selection is insufficient, and sampling representativeness is poor, which is prone to adulteration and falsification. Events, resulting in inaccurate quality inspection results and economic losses to the enterprise, there is a greater risk of quality inspection
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[0022] A sampling method for improving the representativeness of alloy quality inspection sampling, which includes the following steps: In the first step, the supplier performs sequential package numbers on the ton-bag packaging alloy and sprays the package number on the packaging bag; each packaging bag has a unique Package number.
[0023] The second step is to compile a computer random package selection program, and set the number of packages for sampling ton bags according to the sampling rules stipulated by the inspection standards; namely INDEX(A:A,MATCH(SMALL(,ROW(A1)),B:B, 0)), and the randomness function RANDBETWEEN (starting package number, ending package number), input the starting package number, and after terminating the package number, the program automatically generates the sampling package number that cannot be changed at will.
[0024] The following table shows the sampling rules for the specific inspection standards for ton-bag packaging alloys:
[0025]
[0026] W...
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The invention relates to the technical field of alloy quality inspection, in particular to a sampling method for improving alloy quality inspection sampling representativeness. The method comprises the following steps: step 1, sequentially numbering ton bag packaged alloy and spraying the numbers on the ton bag packaged alloy packaging bags; step 2, compiling a computer random bag selection program, and setting the number of casual inspection bags according to a rule specified by a standard; generating a sampling bag number according to a randomness function; step 3, inputting and recording analloy raw material transport vehicle number, an alloy type, a bag number, a starting number and a termination number of a bag number and inspection batch information by an inspector, and after confirmation, randomly generating a sampling bag number by a computer; and step 4, picking out the sampling bag times in the unloading process according to the sampling bag number randomly generated by thecomputer, and carrying out sampling inspection on the picked-out ton bag packaging alloy. According to the method provided by the invention, automatic random sampling inspection is carried out throughthe computer program, human factor interference is effectively prevented, and representativeness and fairness of quality inspection sampling are ensured.
Description
Technical field [0001] The invention relates to the technical field of alloy quality inspection, in particular to a sampling method for improving the representativeness of alloy quality inspection sampling. Background technique [0002] The quality inspection of purchased raw materials into the factory is a key link to ensure the production safety, process product quality and corporate interests of iron and steel enterprises, and it is the "customs" for the quality inspection of raw materials purchased by iron and steel enterprises. Because of the relatively high purchase cost of alloy raw materials, and the quality directly affects the alloy consumption and molten steel quality in steelmaking production, and ultimately affects the quality of steel. All the alloy raw materials purchased are packaged in ton bags. The existing quality inspections of incoming factory are all manual sampling and inspection. Manual selection is interfered by human factors. The randomness of the select...
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IPC IPC(8): G01N1/02G01N1/04
CPCG01N1/02G01N1/04
Inventor 谢吉祥谢碧风刁承民陈勇徐增举陈春赵瑞敏
Owner YANCHENG LIANXIN IRON & STEEL CO LTD
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