Assembly line is an effective combination of human and machine, the most fully reflect the flexibility of the device, it will transport system, with the line fixture and online plane, testing equipment, organic combination to meet the assembly requirements of multi-species products. Assembly lines can be either synchronous or / or asynchronous, and manual or semiautomatic, depending on configuration options. The assembly line is indispensable in the mass production of the enterprise.

    Assembly line equipment selection is based on product technical requirements and assembly process methods to determine. Proper selection of process equipment and tooling for the assembly line can not only improve production efficiency, reduce manufacturing costs, but also rationalize the assembly line layout process. The problems to be considered in the selection of assembly line equipment include: production program; product quality requirements; equipment advancement; equipment reliability; equipment price;

    Product structure and assembly process design is the first consideration in the assembly line layout. Analysis of product structure, research, improve the product structure of the views, can greatly simplify the assembly line production process.

    Production mode is the assembly line layout to consider one aspect, to determine the production methods need to clear the following points: production program; work system, here refers to the work shift and shift work time; production line type, to consider the automatic line or assembly line production, Production or fleet production; management means that the production of the required management methods, systems and regulations.

   Material flow is accomplished by transport. Material transport is indispensable in the factory, we should choose the economic and reasonable mode of transport. It can be concluded that the movement of the material depends on its production factors. The arrangement of the assembly line must ensure the shortest distance of the material flow and always flow to the end of the product assembly line to establish the control system to ensure the material flow.

   To ensure that the flow of material flow on the assembly line, which is to maintain production and balance process capacity is the material flow to the end of the assembly process flow to go, but whenever the material interruption, there will be cut-off to be expected. Therefore, the need to retain a certain amount of reserves, economically sound.

    The assembly line is a special product-oriented layout. An assembly line refers to a continuous production line that is connected by some material handling equipment. Assembly line is a very important technology, it can be said that any has a variety of parts and mass production of the final product to some extent are used assembly line production. Therefore, the assembly line by the assembly line equipment, products, personnel, logistics, transportation and production methods and other factors.

  It is common to assume that the beats of the assembly line are constant and that the processing times of all workstations are substantially equal. Different types of assembly, there are great differences, mainly in:

1. Assembly line material handling equipment (belt or conveyor, crane)

2. Type of production line layout (U type, linear type, branch type)

3. Beats the control form (maneuver, man move)

4. Assembly Variety (single product or multiple products)

5. Assembly line workstation characteristics (workers can sit, stand, follow the assembly line to go or move with the assembly line, etc.)

6. The length of the assembly line (several or many workers)