Hello.
Currently, we are designing a cantilever spring for the first time. The problem in designing is the calculation of plastic deformation. I would like to select and design a material that meets these three conditions: a metal with a length of 1.5 to 5 mm, a displacement of 0.7 to 1.5 mm, and an operating temperature of about 140 degrees. There is some freedom in width, thickness, material, and load.
What kind of calculation can be used to design a spring that does not undergo plastic deformation? I would appreciate it if you could let me know if you have any information on the calculation method and the materials required for the calculation. Thank you.
Thank you for writing, Tomo!
Regarding the operating temperature, if it is about 140°C, the material SUS304CSP-H seems to be good.
For the calculation method, please refer to our technical information of thin flat springs on our website: https://www.tokaibane.com/en/spring-design/flat-springs-formulas
In addition, we will send other materials directly at a later date! For springs that do not undergo plastic deformation, it is first and foremost necessary to make the maximum bending stress lower than the allowable bending stress! At room temperature, the SUS304 CSP-H material should have an allowable bending stress of 850 N/mm2 or less, and at 140°C, it should be further reduced to about 720 N/mm2 or less.
This is my first question here! I would like to use and attach one side of the spring (compression spring, coil spring, piano wire spring?) to another part in some way. How can I pull one side of the spring from the part to a level where it will not move the part? Is there a part specially made for mounting and fixing?
Spring Newbie, when using a cylindrical compression coil spring with the spring end as the fixed end, metal fittings are often attached. Here is a reference image . The shape can be changed according to the shape and mounting method. Thank you!
