Electric rice cooker assembly line

1. Overall structure of the production line

This production line adopts a modular assembly line design and uses industrial aluminum profiles as the skeleton to build a standardized production unit. The production line has a linear layout, and the product flow between stations is realized through a green anti-static belt conveying system. The beat time is controlled at 45-60 seconds/unit, and the daily production capacity of a single line can reach 800- 1,200 units. The entire system is divided into three functional modules: assembly area, testing area and packaging area. Each module realizes linkage control through PLC (Programmable Logic Controller).

2. Core technology configuration

 The automated conveying system adopts a roller conveyor line driven by a variable frequency speed-regulating motor, and cooperates with positioning blocking cylinders to achieve precise station parking. The surface of the conveyor belt is covered with anti-static PVC material to avoid damage to precision electronic components. RFID read and write points are set up at key workstations to track product serial numbers and production data in real time.

 The intelligent assembly station can be seen from the picture that the production line is equipped with multiple automatic screw locking machines and pneumatic press fitting equipment. The liner assembly uses a six-axis cooperative robot to complete accurate alignment, and the repetitive positioning accuracy reaches ±0.05mm. The heating plate installation station is equipped with a torque control system to ensure consistency of tightening torque and eliminate after-sales failures caused by loosening.

 Online inspection system The production line integrates ICT (Online Circuit Test) and FCT (Functional Test) dual inspection mechanisms:

Electronic control board testing: Use a flying needle tester to verify the accuracy of MCU program burning and sensor signal acquisition

Aging test of the whole machine: Set up a high temperature and high humidity aging room to simulate cooking conditions for 30 minutes of full-load operation

Airtightness test: Use a differential pressure leak detector to test the tightness of the liner at a pressure of 0.5kPa, and it is qualified if the leakage is ≤ 1Pa/s.

3. Key process control points

Temperature control system calibration: The IH electromagnetic heating model is equipped with a special power analyzer to calibrate the inductance and resonance frequency of the coil disc one by one to ensure that the heating power deviation is controlled within ±3%.

Safety performance verification: All three safety tests, including ground resistance test (≤0.1Ω), withstand voltage test (no breakdown at 1500V/1min), and leakage current detection (≤0.25mA), are carried out, and the data is automatically uploaded to the MES system for archiving.

Appearance quality inspection: AI visual inspection cameras are deployed at key workstations to identify shell scratches and control panel screen printing defects through deep learning algorithms. The inspection accuracy reaches 0.1mm, replacing traditional manual visual inspection.

4. Information management

The rice cooker production line is equipped with a SCADA data acquisition and monitoring system to collect equipment OEE (comprehensive efficiency), defective product distribution, material consumption and other data in real time. Through the connection between industrial Ethernet and ERP/MES systems, digital traceability of the entire process from order placement to finished product warehousing is realized. When 3 defective products appear in a certain workstation in a row, the system automatically triggers a line stop warning and pushes it to the engineer's Mobile device.

5. Trends in technology

The rice cooker production line is upgrading in the direction of flexibility and intelligence: modular quick-change tooling supports 3L/4L/5L multi-specification mixed line production