What are the requirements of the four-column hydraulic press for the selection of the column?

What are the requirements of the four-column hydraulic press for the selection of the column?

Since the use of small-tonnage four-column hydraulic presses is generally more frequent, the damage to the column is relatively large, so the column is also a very important parameter when selecting a four-column hydraulic press; small-tonnage hydraulic presses have high working frequency, low body stiffness, and easy operation. The speed is fast and there are incomplete statistics. There are nearly 100 hydraulic columns with a nominal pressure below 25000T in China that are broken or damaged. Therefore, when purchasing, you should calculate the column clearly. When calculating the strength of the column, you should pay attention to these points:

1. The repeated drawing stress is too large, which is generally referred to as fatigue damage. The places where the repeated load is carried should be calculated, and the repeated stress of high strength for a long time will cause cracks;

2. In the stress concentration area, where the bending moment is large, it is mainly at the nut connecting the lower beam;

3. Maximum load and centrifugal force; the damage of the column will not be a sudden force fracture, it is subjected to repeated force for hundreds of thousands of times, and then cracks are generated, extending from the cracks

4. Since there is no typical load scheme, the most effective calculation method for fatigue design calculation brings difficulties. When calculating the bearing capacity of the column, a large part is based on the experience of using hydraulic presses, so when explaining to the technicians To be detailed and clear. This article is from the official website of the manufacturer WORLD Press Machine www.pressmachine-world.com, please indicate the source for reprinting!

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