Tolerance management system and management method

Abstract

The invention discloses a tolerance management system and a tolerance management method. The method is used for enterprises to manage product appearance (gap and surface difference), noise, vibration,assembly interference, poor product interchangeability, long manufacturing period and low product qualification rate caused by tolerance in product design and manufacturing stages. According to the solution, tolerance is taken as an entry point, and analysis and feedback are established for detection data of a product in a design stage and a manufacturing stage of the product, so that closed-loopcyclic feedback of a size data flow from design to manufacturing to design is realized; whole-process tracking and management of product part dimensional tolerance from design to process, to manufacturing and then to detection are realized; the capacity of dimensional tolerance design and management of enterprises is continuously improved, and the iterative efficiency of product structure designoptimization is improved. Therefore, the consistency of products is improved, the assembly quality and the assembly efficiency are improved, the design robustness and the product quality stability areimproved, and finally the purposes of improving the quality, reducing the cost, increasing the batch and shortening the period are achieved.

Description

technical field [0001] The invention relates to the technical field of mechanical tolerance management, in particular to a tolerance management system and a management method. Background technique [0002] In the field of mechanical manufacturing, 85% of quality and performance problems are caused by size problems. Due to poor management of dimensional tolerances, many companies have spent a lot of investment in research and development of new products, which cannot be mass-produced, or products often fail to fit during assembly (assembly interference), vibration, abnormal noise, excessive noise, etc. quality performance issues. The traditional quality control methods mainly focus on management through the quality management system, 6 Sigma, etc., while the tolerance part mainly relies on relevant standards and experience. With the digitalization of the manufacturing industry and the improvement of the level of intelligence, the current methods can no longer meet the quali...

AI Technical Summary

Problems solved by technology

With the digitalization of the manufacturing industry and the improvement of the level of intelligence, the current methods can no longer meet the quality control needs of modern digital manufacturing and intelligent manufacturing.

Some companies also improve product design quality through dimensional chain calculation and tolerance analysis, but mainly through manual, excel, and mathematical tools, the calculation efficiency is low, and only some simple problems can be analyzed

It also does not form a closed-loop feedback with actual production, and the design and manufacturing are out of touch, so it cannot really play a role

In addition, the majority of process designers still use manual methods to calculate the process size chain and analyze the process size and margin. For complex parts, there are many times or even dozens of reference conversions, and the processing process involves coating, heat treatment, etc. at the same time. Processing method, manual calculation cannot be completed

Technicians often make simple judgments based on experience, resulting in problems that cannot be processed due to insufficient margin or high product failure rate in the actual processing process

At the same time, it also brings huge risks to product quality and performance.

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