A joint strategy optimization method for equipment maintenance and process control for reliability degradation
A reliability and strategy technology, applied in data processing applications, predictions, instruments, etc., can solve problems such as the inability to quantitatively describe the relationship between batch reliability degradation, the inability to produce cost-batch reliability improvement cost-effectiveness ratio analysis, etc.
Active Publication Date: 2021-07-06
BEIHANG UNIV
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However, the above methods all indirectly improve the reliability of batch products through the monitoring of process quality. However, they cannot quantitatively describe the relationship between the quality of the manufacturing process and the degradation of product batch reliability, resulting in the inability to improve batch reliability. The cost-benefit ratio analysis of the additional production cost and the corresponding improvement in batch reliability
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[0062] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.
[0063] The present invention is a combination strategy optimization method for equipment maintenance and process control oriented to reliability degradation, see figure 1 As shown, the steps are as follows:
[0064] Step 1 The corresponding processing process of a certain type of cylinder head part is as follows: figure 2 shown. According to the design structure and reliability requirements, it is determined that the width of slot C introduced in station 4 is a key process parameter, and the manufacturing defect introduced in station 4 is a key manufacturing defect. Subsequently, the modeling coefficient is determined, and the relationship between product reliability degradation and manufacturing process state is obtained as ΔR=0.95-(0.95-8V 2 )×0.6 D .
[0065] Step 2: According to the observed events monitored by the event time interval contr...
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A reliability degradation-oriented joint strategy optimization method for equipment maintenance and process control. The specific steps are: 1. Establish a manufacturing process quality-product reliability degradation correlation model; 2. Pre-design the joint strategy and determine all sub-scenarios; 3. Calculate the occurrence probability of each sub-scenario; 4. Calculate the expected duration of a single cycle of each sub-scenario; 5. Calculate the expected value of the total operating cost in a single cycle of each sub-scenario; 6. Calculate the product reliability in a single cycle of each sub-scenario Seventh, calculate the average reliability degradation of the system and the expectation of the average operating cost; eighth, aim at the minimum expected average reliability degradation, and jointly optimize the decision parameters of the joint strategy. The invention effectively combines the advantages of equipment maintenance and process control, effectively curbs the reliability degradation of batch products caused by the manufacturing process, and has broad application prospects in the fields of quality management and reliability assurance.
Description
technical field [0001] The invention provides a reliability degradation-oriented joint strategy optimization method for equipment maintenance and process control, which belongs to the field of manufacturing reliability control. Background technique [0002] To meet the challenges of globalization, manufacturers need to continuously meet the ever-increasing requirements of the market and customers in terms of product quality and reliability. The manufacturing process is the decisive process of product formation, and its stability and accuracy directly determine the degree of reliability degradation of batch products. Therefore, strengthening product reliability assurance work in traditional manufacturing quality management and control has gradually become the consensus of academia and industry. [0003] At present, the existing quality management technologies in the manufacturing stage aimed at improving the reliability of batch products can be mainly divided into the follow...
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IPC IPC(8): G06Q10/06G06Q10/04
CPCG06Q10/04G06Q10/06375
Inventor 何益海崔家铭刘枫棣韩笑
Owner BEIHANG UNIV