Automatic inspection device for raw silk cohesion and method for inspecting raw silk cohesion

Abstract

The invention relates to an automatic inspection device for raw silk cohesion. The automatic inspection device comprises a reciprocating linear sliding table, a reciprocating sliding block, raw silk support frames, a raw silk tension weight, a friction blade group, a silk guiding pulley and an automatic inspection control system, wherein the automatic inspection control system is composed of a capacitive silk density sensor, a touch screen, a programmable controller, a motor driver, a sliding table motor and a computer. A method for inspecting the raw silk cohesion comprises the following steps: one end of a raw silk strip to be inspected is fixed to one raw silk support frame through a silk clamping nut, and the other end of the raw silk strip to be inspected penetrates through the capacitive silk density sensor and the friction blade group, then passes through the silk guiding pulley fixedly mounted on the other raw silk support frame, and finally is hooked on the raw silk strip tension weight; the reciprocating linear sliding table is utilized to drive the friction blade group on the reciprocating sliding block so as to carry out constant-linear-speed reciprocating friction on the raw silk strip to be inspected at constant uniform speed; meanwhile, the following capacitive silk density detection sensor is utilized to detect the splitting condition of the raw silk strip to be inspected caused by friction; the programmable controller determines the cohesion performance of raw silk.

Description

technical field [0001] The invention relates to a detection device for raw silk performance and a detection method thereof, in particular to a detection device for the cohesion performance of raw silk and a method for detecting the cohesion of raw silk. Background technique [0002] Cohesion of raw silk refers to the degree of difficulty of splitting the cocoon silk that constitutes raw silk after friction. The number of frictions required to measure the degree of friction is used as the basis for measuring its cohesion performance; that is, "place the thread continuously reciprocatingly between the 10 hooks on both sides of the frame of the cohesion machine, and under constant and uniform tension, different parts of the thread are simultaneously subjected to Friction, the friction speed is about 130 times / min. Generally, when the friction reaches about 45 times, do the first observation. After a certain number of frictions, you should stop the machine and carefully observe ...

AI Technical Summary

Problems solved by technology

[0003] Cohesion test is to detect the cohesion fastness (cohesion performance) of raw silk cocoons. If the cohesion is poor, it is easy to cause fluffing, entanglement, breakage and weaving defects of the cocoon silk during weaving, causing white fluffing, uneven dyeing and other color defects in the fabric. It directly affects the processing and use performance of silk products; therefore, major raw silk importing countries have always expressed concern about the cohesion of raw silk, especially at present with the widespread use of high-speed silk looms and the production of high-end fabrics, silk factories have increasingly put forward higher requirements for cohesion of raw silk. High requirements; however, due to the relative backwardness of the current cohesion inspection methods, it can only be used as an important subsidy inspection item in raw silk inspection

[0004] The main reason for this situation is that the traditional Duplan (Du Polang) type of occlusion machine currently used relies on manual inspection for cohesion detection, and the traditional manual sensory method is still used to evaluate grades; the degree of automation of this inspection method is not high. Strong dependence on sensory perception, low inspection efficiency and accuracy

The main defects are: 1. The friction speed has a great influence on the splitting of the filaments. The faster the speed, the heavier the splitting of the filaments, and vice versa.

However, due to the nonlinear characteristics of the crank-slider device, the reciprocating motion generated by the crank-connecting rod structure inherently has a nonlinear reciprocating motion (the speed changes from zero-maximum-zero with a sine wave rule), that is, the reciprocating friction of the tested raw silk Not constant and uniform, the friction force on each part of the inspected raw silk is different

3. The reciprocating friction stroke is short, and the impact force on the raw silk to be tested is large; the reciprocating friction stroke of the Duplan type cladding machine commonly used at present is only 9 cm, according to 130 reciprocations per minute, the impact is more than 2 times per second, and it is very easy to cause broken wires fail the test

4. Judging and determining the cohesion performance of the tested raw silk by manually observing the splitting of the raw silk, which is highly dependent on human sensory perception, especially after rubbing for 45 times according to the inspection regulations, it is necessary to determine the number of re-rubbing after the first observation. Need to rely on personal experience to estimate, it is difficult to grasp accurately, and the eyesight of different inspectors is different, even if the same inspector conducts inspections under different conditions, it is difficult for their eyes to be completely consistent, and there is a loophole of inaccurate results

However, since the detection method of this device is to use the method of fast movement of the inspected thread and the friction blade does not move, it is different from the traditional raw silk coagulation detection method in which the thread is still and the friction blade moves quickly (the friction speed is about 130 times / min). Inconsistent, and the length of the tested silk is not consistent with the length of the currently tested sample silk, and the cracking change of the raw silk during the friction process is closely related to the linear density of the raw silk, the tension applied, the friction speed, the friction method and the cohesion performance of the raw silk itself. , if the detection method, principle, and detection equipment are inconsistent, the detection results will be greatly different from those of the original Duplan-type interlocking machine, and traditional raw silk users will not accept the detection results obtained

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