Transverse Vibration Properties of Heald for Jet Loom

Abstract

It becomes important to understand dynamic properties of moving parts of the loom according to increasing speed on the jet loom. There is no-information, however, for the heald vibration generated in the shedding motion of the loom. In this report, natural frequencies of the transverse vibration forhealds are investigated by means of impulsive resonance. Frequency resonances are obtained for ten kinds of commercial flat healds those differ in their length, thickness or material by using animpacthummer equipped with a load sensor and a laser displacement sensor system. The natural frequency of a flat heald can be roughly estimated on the assumption that it has an uniform rectangular cross section. It is also found that the first natural frequency of the transverse vibration for the flat heald supported on its both ends exists slightly higher than its actual driving speed.