Green mold spring:

Green mold spring compression deformation in 19.2%, 21.6%, 24% range, mold spring is a heavy load compression spring, made of rectangular section steel wire, rectangular section mold spring compared with circular section spring, in the same space the use of rectangular section spring cross-sectional area is large, so its stiffness is large, can be used as a heavy spring. The stiffness of the die spring with a rectangular section is also close to a straight line, so the stiffness is relatively stable.

Network optimization materials:

The outer packing box of the compression mold spring is firm and can not be damaged. Marked, such as product name, model specification, manufacturer, production date and total number, etc.

Testing methods and regulations

The diameter and inner diameter of the elastic yellow of the compression mold, arbitrary aspect ratio, flatness, parallelism, compression aspect ratio, process performance and other detection methods are tested according to the sixth article of GB/T1239.2-2009.

Elastic yellow service life detection: the elastic yellow is installed in the automatic door closing device, above the circulating system load of the test bench for 500,000 times, and it is stipulated that the elastic yellow cannot be broken. The opening and closing torque, closing torque and energy efficiency level change between 500,000 tests and 5000 tests shall not exceed 30%.

Tensile mold elastic yellow performance index detection: the specimen elastic yellow is installed in the automatic door closing device, torsion mold spring in the enterprise laboratory of automatic door closing device test platform to carry out testing; The opening and closing torques and energy efficiency levels of the automatic door closing device at the original time, 5000 times and 100,000 times shall be tested successively, and the test results shall comply with the provisions of Table 1 of QB/T2698-2005.

Elastic yellow deformation detection: elastic yellow is installed in the automatic door closing device, the circulation system of the automatic door closing device test bench in the enterprise laboratory is operated for one hundred thousand times, and then the elastic yellow is removed to detect the total aspect ratio transformation of the elastic yellow, which is not allowed to exceed 1% of the total aspect ratio.

Limit error detection of spring stiffness k: the elastic yellow shape variable of the specimen is between 30% and 70% of the shape variable under experimental load, and the spring stiffness of the specimen should meet the requirements