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AboutOur company mainly deals in springs, tension springs, torsion springs, and irregular springs; Spring steel wire; Metal forming; Steel wire products; Over the years, the company has consistently adhered to the principle of seeking development through service, and has established a sound business operation mechanism for irregular springs.
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ProductsOur company mainly deals in springs, tension springs, torsion springs, and irregular springs; Spring steel wire; Metal forming; Steel wire products; The irregular spring has made significant progress.
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BlogsOur company mainly deals in springs, tension springs, torsion springs, and irregular springs; Spring steel wire; Metal forming; Steel wire products.
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ServiceWe are willing to warmly welcome domestic and foreign merchants to cooperate sincerely and create brilliance together. Welcome to leave a message or call.
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RecruitmentOur company mainly deals in springs, tension springs, torsion springs, and irregular springs; Spring steel wire; Metal forming; Steel wire products; Irregular springs have made significant progress in development
Reasons for problems occurring during the use of stretch springs
Release time:
Feb 11,2023
Source:
1. WhyTension springInsufficient elasticity during use
1. The design and manufacturing parameters of non-standard springs are unreasonable: only focusing on parameters such as outer diameter, inner diameter, and length often neglects the cross-sectional area and pitch of the wire, resulting in insufficient spring force.
2. Unreasonable selection of standard springs: choosing light load types because they are cheaper in drawings, which cannot withstand heavy loads, leading to insufficient spring force.
3. Incorrect quality grade of compression springs: inadvertently treating ordinary springs as high-quality or imported springs, resulting in insufficient elasticity.
4. Using beyond the specified temperature, leading to reduced elasticity or even damage.
5. The spring wire itself is too soft, or the quenching temperature of the spring is too low or the holding time is not long enough, or the tempering temperature is too high, and the time after spring formation is too long, resulting in insufficient tensile and compressive strength for elasticity.
2. Why do tension springs break
1. If the core shaft is too small or when the spring is used horizontally, wear and breakage occur between the spring and the core shaft.
2. When the core shaft is too small and the parallelism of the positioning surfaces at both ends is uneven, the spring will be compressed and twisted, causing local high-pressure breakage.
3. If the core shaft is too short and lacks a chamfer at the end, it leads to friction wear and breakage between the spring and the core shaft.
4. The presence of foreign objects between pressure coils reduces the actual effective number of coils, leading to high stress and breakage.
5. Using compression springs in series can cause bending of the core shaft or variations in hole depth; due to slight differences in the springs themselves, lighter loads may experience greater compression and breakage.
6. Exceeding a greater compression amount will cause the spring to break, generating high effective stress.
7. Uneven spring materials or excessive impurity content lead to stress concentration and breakage.
Production temperature of tension springs
As the working temperature of tension springs increases, the elastic modulus, bending stiffness, and load capacity of tension spring materials decrease. Therefore, tension springs working at high temperatures must master the elastic modulus to calculate how reduced load capacity affects performance indicators. Generally, when the working temperature of helical springs exceeds 60 degrees Celsius, adjustments to the shear modulus of helical springs are necessary.
Spring materials used at low temperatures should have good low-temperature ductility; carbon spring wire, electronic piano wire, low-alloy steel spring wire such as 1Cr18Ni9, copper alloys, nickel-based alloys, etc., have good low-temperature ductility and compressive strength.
At low temperatures, material ductility is very sensitive to surface defects; therefore, there are strict requirements for surface quality. Natural materials are much less susceptible to corrosion than those in greenhouses; processes like electroplating cadmium and hot-dip galvanizing can easily cause brittle fracture.
The changes in elastic modulus and expansion coefficient of materials are minimal and can be ignored in formulas.
The selection of hardness and compressive strength for steel springs is based on the load characteristics and internal stress of the springs; relative hardness is closely related to fracture toughness under plane strain.
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