METHOD FOR PREDICTING REMAINING LIFE OF HOSE AND METHOD FOR DIAGNOSING DETERIORATION LEVEL OF HOSE

摘要

Provided is a method for predicting the remaining life of a hose and a method for diagnosing the deterioration level of a hose that can be easily performed without breaking the hose. The disclosure includes: a testing step of performing a hose bending test; and a predicting step of predicting the remaining life of a hose subject to prediction, wherein during the hose bending test, either a value of an external force required to displace a hose portion in a direction of the external force by a predetermined displacement amount, or a value of a displacement amount in a direction of the external force of the hose portion when the external force of a predetermined magnitude is exerted on the hose portion is measured, and the measured value is obtained as the test result.

主权项

1. A method for predicting remaining life of a hose having a metal wire layer and an inner tube rubber layer disposed on an inner peripheral side of the metal wire layer, the method comprising:
a testing step of performing a hose bending test on a hose subject to prediction for remaining life; and a predicting step of predicting remaining life of the hose subject to prediction based on comparison between a test result obtained by performing the hose bending test on the hose subject to prediction and a test result obtained by performing the hose bending test beforehand on a hose of the same type which is in a use limit state, wherein during the hose bending test, while an external force is exerted on a predetermined hose portion of a hose subject to testing to cause bending deformation in the hose portion, either a value of the external force required to displace the hose portion in a direction of the external force by a predetermined displacement amount, or a value of a displacement amount in a direction of the external force of the hose portion of when the external force of a predetermined magnitude is exerted on the hose portion is measured, and the measured value is obtained as the test result.