The lean logistics system has changed the traditional equipment layout and adopted a U-shaped layout. This arrangement is to connect the required machinery and equipment in series according to the requirements of the parts and components, and arrange them into a U-shaped production unit. On this basis, several U-shaped production units are combined to form an integrated production line. The layout of the U-shaped production line is shown in the following figure: It can be seen from the figure that the U-shaped layout has the following characteristics:
The equipment layout is compact, which facilitates the transfer between workpieces, reduces the transportation time and transportation costs of workpieces, and helps realize single-piece production and single-piece delivery;
Since the exit and entrance of the U-shaped production unit are in the same position, this enables "pull-type" just-in-time production;
The number of products in the production unit is stable, the production cycle is easy to control, and no redundant products are produced. This enhances the flexibility of the production unit and can quickly adapt to changes and adjustments in the production plan;
This partial just-in-time production is consistent with the overall just-in-time production of the whole factory, and it is also necessary for the overall just-in-time production of the whole factory;
Operators in the production unit are allowed to work between the two sides of the U-shape and operate the machine tools adjacent to each other at the same time. This not only improves the work efficiency of the operators, but also facilitates the adjustment of the number of operators on the production line or in the production unit at any time to adapt to changes in product output requirements.