An Adaptive Control Method of Die Production Process Based on Dynamic Kanban

Abstract

The invention discloses an adaptive control method for the mold production process based on a dynamic kanban, which includes establishing a push-type load balancing control mechanism based on a dynamic kanban, establishing a pull-type job assignment and coordination mechanism based on a dynamic kanban, and establishing a comprehensive process planning method. Launching task selection model, dynamic calculation of flexible process delivery time, simulation-driven coupling control parameter optimization and establishment of rule-oriented disturbed response sequence generator. The invention can break through the application limitations of the push-pull hybrid control method in highly variable and complex production environments, enriches the production control system theory of the existing non-repetitive manufacturing process, and accelerates the development of mold enterprises to high-end by improving the automation level of production control. The transformation and upgrading of precision mold manufacturing can improve the overall service level and international competitiveness of my country's mold industry. It can also provide solutions to the complex production control problems of other single-piece and small-batch manufacturing enterprises. It has a wide range of engineering application prospects. .

Description

technical field [0001] The invention belongs to the technical field of industrial production process control systems, and in particular relates to an adaptive control method for mold production process based on dynamic Kanban. Background technique [0002] Mold enterprises adopting the engineering-to-order (Engineering-to-order, ETO) single-piece small-batch production method is a typical non-repetitive manufacturing system. In the past ten years, with the leapfrog development of industries such as automobiles, home appliances, communications and packaging, it has also greatly promoted the upstream mold industry. But in general, domestic mold products are mostly concentrated in low-tech fields, and high-end precision molds are still more dependent on Japan, South Korea, Western Europe and other countries. Under the effect of the domestic manufacturing environment such as market saturation and rising labor costs, the added value of low-end and mid-end molds has become lower ...

AI Technical Summary

Problems solved by technology

[0004] 2. Difficulty in coordinating production schedules brought about by multi-level product structure and diversified accessory tooling: high-precision molds usually have complex parts assembly relationships, and parts need to be delivered to the assembly unit in sequence according to the requirements for a complete set of assembly materials, but due to There are large differences in the process route and processing hours between related parts, and there are multiple sets of molds sharing processing resources at the same time in the production process, which makes it quite difficult to coordinate the production schedule of parts that meet this increasing material demand; in addition, high-precision molds The manufacturing process often requires a lot of hard / soft tooling, such as electrodes and NC programs, which are the preconditions for the part to start processing. In this case, it cannot be assumed that they will always be ready at the beginning of the part. Its completion schedule needs to be dynamically coordinated with the production schedule of parts

[0005] 3. High uncertainty brought about by differentiated technical requirements and experience-dependent process realization: the working hours of parts cannot be accurately predicted in advance, and only a preliminary estimation range can be given based on past practical experience, and the processing effect of the previous process will affect The operating parameters of the next process cause uncertain processing man-hours, so the estimation of man-hours will only become accurate as production continues to advance; the proportion of rework / rework parts caused by quality accidents is greatly increased; the complexity of part manufacturing It also increases the failure rate of various types of equipment to a large extent; there are many types of raw materials required, and the probability of materials not being in place in time or quality problems of raw materials is greatly increased; design changes and process parameter changes are extremely frequent, etc.

[0013] To sum up, although the WLC-based HPP method is suitable for solving the production control problem in the high-precision mold manufacturing process, the existing methods have obvious deficiencies in the three aspects of operating mechanism, optimization method and disturbed response.

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