1. Overview of the sightseeing car production line
The production line is specially designed for the mass production of sightseeing vehicles (electric/fuel). It adopts a modular flexible manufacturing concept and is compatible with the production of multiple models with 4-14 seats. The entire line consists of four major process stages: welding, painting, final assembly, and inspection. The beat time can be set to 15-30 minutes/unit according to the production capacity demand. The annual production capacity is designed to be 3,000 – 8,000 units. It can also be used to adjust the speed.
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2. Sightseeing bus process layout and technical parameters
Welding line: resistance spot welding +CO ˇ shielded welding hybrid process, frame assembly accuracy ±1mm Gantry welding platform, turning fixture, welding robot (optional).
Coating line: cathodic electrophoretic primer + electrostatic spray topcoat, salt spray test ≥ 500h Spray pretreatment, electrophoresis tank, drying room, water curtain spray booth
Assembly line (as shown in the picture): ground drag chain + plate conveying, work-based assembly Double-column lifter, fixed torque wrench, power assisted robot arm, station spreader
Inspection line: four-wheel alignment, braking performance, insulation testing, road test Side slip test stand, axle load meter, charging pile, circular test track
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3. Detailed technical explanation of sightseeing car assembly line (core workstation)
1. delivery system
– It adopts ground drag chain assembly line for circular conveying or plate chain continuous conveying, and the station spacing is 6-8 meters
– Body and chassis sub-assembly process: After the chassis line completes the packaging and assembly of motors, suspensions, and batteries, it is combined with the body interior line to reduce the working height and improve ergonomics
2. Critical workstation configuration
– Chassis assembly station: Equipped with a hydraulic lifting platform to achieve accurate positioning of battery packs and drive axles
– Interior decoration station: The top is equipped with slide rail spreader to assist in lifting the roof and seats. A single station is equipped with 2-3 fixed torque pneumatic wrenches
– Wiring harness station: Pre-wiring harness frame + electronic testing system to ensure that the insulation of the high/low voltage circuits meets the standards
– Commissioning station: Close the test area and complete functional verification of steering, braking, lighting, and electronic control systems
3. logistics system
The production line uses aerial KBK light cranes (as shown in the yellow track in the picture) to realize the distribution of large items such as engines and seats.
– Ground AGVs or forklifts supply tires, batteries and other materials, and work with the MES system to achieve just-in-time feeding
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4. Intelligent and informatization of sightseeing car production line
– Production line MES manufacturing execution system: collects production, quality, and equipment status data in real time, and supports scanning code traceability
– Safety lamp system: Immediate alarm for abnormal workstation, response time <2 minutes
– Energy monitoring: Thermal energy recovery in the coating line, frequency conversion control of the air compressor, reducing comprehensive energy consumption by 15%
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5. Summary of technical characteristics of sightseeing bus assembly line
1. Flexibility: quick fixture change + program switch, vehicle switching time ≤30 minutes
2. Humanization: The height of the workstation is adjustable, and the configuration of key workstations helps the robot arm and reduces labor intensity
3. Extensibility: Reserve robot interfaces and can be gradually upgraded to automated production lines
