Tension-controllable yarn feeding device of three-dimensional knitting machine and use method

Abstract

The invention discloses a yarn feeding device for rapidly controlling tension stability of a three-dimensional braiding machine. The yarn feeding device comprises a motor, a yarn drum on the motor, a linear guide rail, a buffer device which is arranged on the guide rail and is used for assisting in controlling tension, a visual sensor and a tension sensor, wherein the visual sensor and the tension sensor are matched with the buffer device. The motor rotates the spool to send out yarn, and the yarn is sent to a knitting area through the buffer device and the tension sensor. In the weaving process, the tension of the yarn is increased or decreased through adjustment of the buffer device, when the tension in the buffer device is continuously increased or decreased, the tension can be detected through the visual sensor, the rotating speed of the motor is adjusted in advance, and it is ensured that the tension can be adjusted in real time. When the tension suddenly exceeds the adjusting range of the buffer device, the tension sensor can detect abnormity, change the rotating speed of the motor, adjust the yarn feeding amount and maintain the stability of the tension.

Description

technical field [0001] The invention belongs to the field of three-dimensional weaving, and in particular relates to a yarn feeding device for controlling the constant tension of carbon fibers in three-dimensional weaving. Background technique [0002] In three-dimensional weaving, the quality of the finished product of the knitted piece is related to the quality of the yarn feeding device, especially the tension of the yarn, which has a great influence on the quality of the knitted piece. , Different fabric shapes, change the amount of yarn feeding, maintain the stability of tension, and avoid large changes in tension. [0003] Usually, the active yarn feeding equipment will use the data measured in the past to calculate the time and speed of yarn feeding, or use the sensor to measure the state of the yarn, and judge whether to increase the yarn feeding speed or reduce it. yarn speed. Therefore, no matter what method is used, active yarn feeding has problems such as not b...

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Problems solved by technology

Therefore, no matter what method is used, active yarn feeding has problems such as not being applicable to all knitting tasks, or not being able to give feedback on the yarn feeding speed in time. When the tension of the yarn is too large or too small, knitting cannot be performed. Produces higher quality knits and even breaks the yarn

[0004] On the other hand, if the passive yarn feeding method is used, the tension can be quickly adjusted within a certain range through the device if the tension is too large or too small. However, the passive yarn feeding method has problems such as taking up a large space and inaccurate tension adjustment, and cannot be adjusted independently. For weaving work requiring high tension

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