The application of frame assembly in the processing technology and integration of auto parts

Processing unit based on group technology We adopted the organization form of processing unit in the machining workshop in the technical transformation project of the relocation of an automobile chassis parts manufacturer. The company mainly produces independent suspension systems and brake parts. The original processing and production are divided into multiple workshops. Due to the limitations of the original site, the layout of the workshops is relatively scattered. The main production organization in the workshop is the cluster layout, resulting in production logistics Cross and roundabout, increase logistics costs. This time because of the opportunity of relocation and technical reform, the company hopes to expand its production capacity while improving its management level and gradually realize ERP management.

After analyzing the products and production process of the factory, it is found that the main processing parts of the factory, such as ball pins, spherical pins, joints, ends, etc., have structural, material similarity and process similarity, and they are large in quantity, suitable for group processing technology .

The analysis is now carried out with the production workshop of independently suspended lever arms. The workshop is divided into joint processing area, end processing area, spherical pin processing area, etc. according to the principle of similar parts structure and process similarity. Each district is divided into 23 processing units according to the production program of the product, which is beneficial for enterprises to replicate and expand their production capacity according to their own capabilities and market demand. Take the spherical pin processing as an example. The part blank is an outsourcing forging into the blank warehouse. The part processing consists of drilling the center hole (double-sided centering machine tool) y rough turning rod and ball (profiling lathe) y drilling (drilling machine) ) Y Finish turning the rod and ball (CNC lathe), and enter the warehouse after cleaning and inspection after processing. The layout of the machine tool for the spherical pin processing unit. This processing unit adopts a U-shaped layout.

This group of processing units can complete the annual production capacity of 100,000 pieces, and can be replicated with the expansion of the production program; the material carts are used for transportation between the processing units, and the logistics basically flows in the closed production unit. The processing of various machine tools The ability is relatively balanced, which can greatly reduce the waiting time; the operation of the CNC lathe adopts the way that one person takes care of two equipment at the same time, which improves the simultaneous care coefficient of the equipment. It can be seen that the adoption of this layout scheme has significantly improved logistics and reduced production costs.

After the transformation of modern production management based on group technology, the enterprise needs to implement ERP system to integrate enterprise resources and improve management level. Group production units are connected to the ERP system through information technology, which builds the foundation of modern management. As shown, the entire production management system is centered on ERP, and the scheduling management is based on the principles of /urgent priority 0/inventory * small 0. Processed parts use the product data management system to convert the information required by the ERP from the CAD system; the production management system interacts with the ERP data to determine the process route, man-hour quota and tools according to group technology or computer-aided process design (CAPP) to convert the parts The processing tasks are assigned to the corresponding processing units. As a result, the workshop plans to replace the original process management with the management of similar parts; the quality management is mainly transformed from the control of the inspectors to the automatic control of the processing unit; the worker is developed from one person, one machine to one person with multiple machine tools. As the basis of the flexible manufacturing system (FMS), the processing unit simplifies production planning and scheduling, and improves the flexibility and work efficiency of workshop production.

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