The progressive die punching speed of the washing machine motor reaches 300 times/minute. Which structural designs ensure stability?- Zhejiang Ruixin Mould Technology Co., Ltd

1. High-precision manufacturing and material selection

Washing machine motor progressive die adopts micron-level processing accuracy (step accuracy of 3μm, block accuracy of 1μm), and uses high-strength materials such as cemented carbide to ensure that the parts fit tightly and reduce deviation and wear during stamping. For example, Gree mold has improved the accuracy to 0.001 mm through innovative processing technology, while balancing the blanking gap and reducing problems such as chipping.

2. Structural decomposition and stress dispersion design

Complex parts are decomposed into multiple simple processes (such as blanking, flanging, bending), and segmented punching is used to disperse stress and avoid local overload. At the same time, empty spaces are set to avoid too small wall thickness, optimize the overall stress state of the mold, and improve strength. Ningbo Hongda's mold realizes process decomposition through automatic lamination, twisting groove and other functions to ensure stability at high speed.

3. Optimization of guide and unloading system

The unloading plate also serves as a guide plate to ensure accurate positioning of the material during high-speed stamping and reduce vibration and offset. Gree optimizes the mold assembly process through CAE simulation analysis, improves the fluctuation problem of the feeding belt, and improves the feeding stability.

4. Automatic detection and electronic monitoring device

The mold is equipped with electronic monitoring devices such as misfeeding detection and double material thickness detection to monitor the material position and status in real time to prevent mold damage due to feeding errors or material abnormalities. For example, Ningbo Hongda's molds are automatically monitored through solenoid valves and sensors.

5. Lubrication and maintenance design

High-speed punch presses use forced lubrication systems (such as butter lubrication) to reduce wear on joints and maintain long-term operating accuracy. It is pointed out that punching of more than 300 times/minute requires a high-precision punch press with forced lubrication to avoid reduced accuracy and mold damage.

6. Feeding system and dynamic balancing technology

Dynamic balancing technology is used to reduce vibration, and combined with feeding step optimization (such as the feeding design of the three-row compressor core mold), to ensure smooth material delivery at high speed. Gree has improved feeding stability to 380 times/minute through structural innovation.

7. Intelligent simulation and process optimization

CAE simulation is used to analyze the speed strength and stress state of the mold and optimize the structural design. For example, Gree improved the problems of mold size fluctuation and insufficient assembly precision through simulation and achieved stable production of 360 times/minute.

8. Long life and reliability design

The mold life is more than 200 million times, and the service life is extended by segmented punching, high-quality materials and surface treatment (such as three-proof process). Ningbo Hongda's mold has a single grinding life of 1.8 million punches and a total life of 200 million times.