How to check the quality of the spring clip
2021-10-19
Railway accessories are divided into many kinds,Spring Clip is one of them.The function and effect of Spring Clip is undeniable,but in order to ensure the quality of spring bar fastener,it is necessary to carry out comprehensive quality inspection.Tests are mainly carried out from the following aspects: 1.Surface quality:Elastic Clip For Railway small bend part is not allowed to have significant indentation and crease.There should not be visible cracks on the surface of the spring bar and burrs affecting the later use.With fine indentation and burr,allow the use of grinding tools to repair,make the surface of the spring smooth. 2.Appearance standard:The appearance standard shall be tested by measuring viviparous.If Elastic Clip For Railway can be put into the testing viviparous freely,it shall be qualified.If the inspection is not qualified,a second sampling reinspection can be carried out.If it passes the secondary sampling inspection,it is qualified product.Otherwise,the production should be interrupted immediately and the reasons should be found out for processing. 3.Hardness:Rockwell hardness tester with reading accuracy of HRC 0.5 is used for hardness testing Elastic Clip For Railway.Uniform hardness is qualified within the range of HRC 42-47. 4.Buckle pressure test:Metal Spring Clip For Railway buckle pressure test should be carried out on the test table.When the displacement of the pinch toe is 11mm,the buckle pressure is qualified within the range of 8330n-9310n.Secondary heat treatment is allowed for batches of unqualified buckle pressure,but it is necessary to pass a comprehensive quality test before they are deemed qualified. In general,in order to ensure the overall quality of the snap fastener and the application effect,it is necessary to ensure that the quality of the snap is qualified.
