Wuhu Changrui Phase II Plant CX62 Automation Project

Project case: ZB20004-CX62 automation project of Wuhu Changrui Phase II factory

1. Project name:

ZB20004-Wuhu Changrui Phase II Factory CX62 Automation Project

2. Project time:

March 2020

3. Project location

Wuhu Changrui Phase II Factory

4. Project introduction:

Model: CX62 Model

Capacity: 30JPH

Beat: 108S

Scope of supply: engine room left and right front longitudinal beam assembly, engine room front structure assembly, back door inner panel assembly automation work island

5. Core technology:

1. Standard ground precision positioning fixture switching system;

2. Standard man-machine safety protection system;

3. Standard PLC control system;

4. Standard turntable, sliding table, octagonal tube gripper system

As one of the four major processes in the automotive industry, the welding process is self-evident. It shoulders the important mission of forming the body and providing a supporting frame for the vehicle. In addition to ensuring the appearance and shape, it must also ensure that all parts of the final assembly The precision of the component installation point, so its process is far more complicated than the other three major processes. The planning and layout of the production line not only need to consider from the aspects of precision assurance, production efficiency, distribution logistics, and storage, but are also limited by the plant area and structure, Existing conditions such as painting corridors. There is no perfect layout plan, only the most suitable layout plan at present.

Capacity calculation and beat determination

In the first step of planning, there must be the annual production capacity requirements input by the marketing department and the company's strategic planning department. According to the production capacity requirements, the production takt and single-station operation time are calculated as the main data for process splitting and determination of the number of stations. The calculation method as follows:

Production takt (JPH) - the number of units produced per hour.

Production days - 365 natural days, deducting national statutory holidays and weekends, the annual production days are roughly calculated as 251 days.

Daily production time - 8 hours for a single shift, 16 hours for a double shift, and 22.5 hours for a three shift.

Equipment operating rate—the effective operating ratio of equipment, the equipment operating rate of the welding workshop is generally set at 90% during planning.

Splitting the process and determining the number of stations

The design department enters the overall product structure, drawings, and process routes, defines the content of the welding process, and then splits the process into a single station. The following principles must be followed:

(1) Spot welding is generally calculated according to the average operation time of each welding spot of 3s;

(2) Due to the low dust emission and low work efficiency of arc welding, it is necessary to arrange it as concentrated as possible to avoid dispersion;

(3) The operating time of loading, picking up, clamping and opening of fixtures can be set according to past experience;

(4) The effective working time + delivery time of a single station shall not be greater than the working time of the station;

(5) The station loss in the conveying arrangement needs to be considered.