The task of final assembly is to assemble various parts, components and elements such as engine and transmission on the body base according to certain assembly technical requirements and assembly relationships to form a complete and qualified automobile. This article combines the project practice of CASUN in the comprehensive solution of intelligent logistics in the automobile industry over the years, and analyzes the intelligent planning direction of the intelligent assembly workshop and the introduction of AGV application.
The automobile assembly workshop is the place where the painted body is turned into a finished car, and it is the largest workshop in the OEM. Usually a car needs to be assembled with about 1000 to 2000 parts in the final assembly workshop. There are many types of parts and many types of assembly technologies. Therefore, this workshop is also the one with the most types of equipment.
① Save manpower
The application of lift AGV has changed the mode of logistics transportation, which can effectively replace manual handling and reduce material distribution personnel;
② Reduce errors
The precise connection of the system reduces the problem of material supply caused by human error;
③ Improve production efficiency
Personnel work at hand, reducing labor intensity and improving production efficiency;
④ Reduce security risks
AGV replaces battery trucks, forklifts and other operating vehicles, which greatly reduces the potential safety hazards caused by human-computer interaction;
⑤ Improve the degree of intelligence
The seamless connection between each technology workshop through AGV improves the intelligence of the factory;
⑥ Save space and improve space utilization
The flexibility of AGV solves the problems of large space occupation and difficult transformation of traditional transmission tools. Traction-type AGVs are mostly used in logistics transportation, which are small in size and low in price. It is used in conjunction with skip car with casters to transport the skip car to the designated location.
AGV can be divided into many types according to different elements (such as navigation mode, load mode, etc.). The AGV application in the automobile assembly workshop is classified according to the function, and the AGV application scenarios in the assembly workshop are listed. There are mainly two types of assembly AGVs and distribution AGVs in the final assembly workshop.
① Assembly AGV
Assembly AGV is mainly used for the assembly of the power assembly on the chassis line of the car, the rear suspension assembly with the compression damping spring and the body in white. According to the form of its lifting mechanism, it can be divided into single-lift type and double-lift type.
(1) The single-lift AGV consists of a body of an AGV vehicle and a lift. It is mainly suitable for the assembly of the power assembly of the car and the body in white, and the assembly of rear suspension assembly with the compression damping spring and the body in white.
(2) The double-lift AGV consists of the body of the AGV vehicle and two lifts, etc. It is mainly suitable for the assembly of the power assembly of the car and the body in white, and the assembly of rear suspension assembly with the compression damping spring and the body in white.
② Distribution AGV
The distribution AGV has a simple structure, is equipped with lifting pins, and has the functions of distribution, automatic decoupling and hooking with the skip car. According to the driving method, the distribution AGV can be divided into one-way drive type and two-way drive type.
(1) One-way drive AGVs can only move forward in a single direction. The running route is a closed loop. Multiple AGVs can run at the same time in sequence. It is suitable for line material distribution with strong rhythm. It is suitable to be applied with the SPS (SetPartsSupply) mode.
(2) The two-way drive AGV Robot can walk in both forward and backward directions. The running route is a round-trip single line. Only one AGV is allowed to run alone on the running route. It is suitable for material transportation between two points, and the AGV travels back and forth between two points. The material tooling is fixed with the AGV. It is suitable to use it only for loading and unloading materials.