织造学下文档（Documentation for weaving）.docVIP

织造学下文档（Documentation for weaving） Four, the factors affecting tensile deformation 1, shed height (H) 2. Length of shed (L) 3, back beam height (d) Straight line - equal tension shed Above straight line - unequal tension shed (lower tight upper pine) Beneath the straight line -- the unequal tension shed (loose and tight) Three. Rule of heald frame movement (s, V, a) Affecting the stability of heald frame (1) process requirements 1, kinematics view (kinematics) Relaxation fast leveling The tension is slow and full 2, dynamics view (dynamics) A changes should be relaxed and the peak value should not be too large Rigid impact, flexible impact Three, curve analysis Simple harmonic elliptic polynomial A relative opening; a relatively small time The usual speed is small and big Full braking and acceleration at the start of large and medium zero High speed, better bad Shedding mechanism (1) heald frame linkage type; 1. Principle of action Lift stroke Ascending and falling rule Lifting order 2, advantages and disadvantages (advantage, and, shortcoming) The utility model has the advantages of simple mechanism, convenient installation and maintenance, and low manufacturing accuracy Disadvantages: the sling belt is easy to deform: hang the circular arc at the heald and shake the heald frame Poor lighting oil defect; for R = 5 in low speed (two) spring rebound type; 1. Principle of action 2, advantages and disadvantages Advantages: simple structure Suitable for high speed and improved adaptability of varieties Disadvantages: large load, heavy fabric should have some influence on the beam, lighting; Spring fatigue - not clear 3, motion pattern shedding (chain) Ribbon loom to reduce cam storage Four) grooved cam shedding mechanism 1. Principle of action 2, characteristics (1) good lighting (2) reduce oil defect (3) high speed and good adaptability to improve (4) 5) heald frame movement is smooth (6), cam pressure angle is small (7), cam manufacturing requirements are high, easy to