CN105043880B - A kind of yarn withdrawing device of adjustable pretension and its application - Google Patents

Abstract

The invention discloses a yarn drawing device with adjustable pretension, which comprises an outer frame, a stretching unit and a clamping unit, wherein a pair of opposite sides of the outer frame are respectively provided with a first cover plate and a vertical plate , the other pair of opposite sides is respectively provided with a chute at one end close to the vertical plate, a slider is set up between the two chutes, a second cover is provided on the upper part of the slider, and the fabric to be processed passes through the first The cover plate and the second cover plate are sandwiched inside the outer frame; the stretching unit includes a digital tension tester and a stretching electric rod, the tension tester is connected with the slider and the stretching electric rod respectively, and the stretching electric The other end of the rod is connected with the vertical plate, and the stretching electric rod drives the movement of the slider to apply tension to the fabric; the clamping unit is arranged on one side of the outer frame provided with the chute for clamping in the stretching The lower chuck of the machine. The device can quantitatively adjust the pretension of the fabric, and more accurately test the pulling performance of the yarn under different pretensions.

Description

An Adjustable Pretension Yarn Pulling Device and Its Application

technical field

The invention belongs to the technical field of textile fabric testing equipment, and in particular relates to a yarn drawing device with adjustable pretension and its application.

Background technique

Yarn extraction means that a single yarn is extracted from the fabric structure under the action of external force, and the extraction force is related to the structural shape of the fabric and the friction performance of the yarn interweaving intersection points. When the fabric is subjected to ballistic impact, the pulling and slipping of the yarn in the fabric is an important way of energy absorption. The study of the pulling performance of the yarn plays an important role in the design of the bulletproof fabric and the research of the bulletproof mechanism of the fabric. Since the fabric is a flexible body, it is necessary to ensure that the drawn yarn can be drawn out smoothly, and the entire fabric should be kept flat and held during the drawing process, so as to truly simulate the state of the fabric under impact. The current fabric stretching clamps are all clamping at one end of the entire fabric as a whole, and there is no pulling device that can not only effectively hold the fabric but also smoothly extract a single yarn.

Contents of the invention

Purpose of the invention: In order to solve the problems existing in the prior art, the present invention provides a yarn drawing device with adjustable pretension, which can quantitatively adjust the pretension of the fabric, and more accurately test the yarn under different pretension. extraction performance.

Technical solution: In order to achieve the above technical purpose, the present invention proposes a yarn drawing device with adjustable pretension, including an outer frame, a stretching unit and a clamping unit, wherein a pair of opposite sides of the outer frame The sides are respectively provided with a first cover plate and a vertical plate, and the other pair of opposite sides of the outer frame are respectively provided with a chute at one end close to the vertical plate. A sliding slider, the upper part of the slider is provided with a second cover, and the fabric to be treated is clamped inside the outer frame through the first cover and the second cover; the stretching unit includes several An explicit tension tester and a stretching electric rod, one end of the digital display tension tester is connected to the slider, the other end is connected to one end of the stretching electric rod, and the other end of the stretching electric rod It is connected with the vertical plate, and the movement of the slider is driven by the stretching electric rod to apply tension to the fabric to be processed; the clamping unit is arranged on one side of the outer frame provided with the chute For clamping the lower chuck of the stretching machine.

Preferably, the length of the outer frame is 350-450 mm, the width is 200-250 mm, the frame width is 30-40 mm, and the thickness is 4-5 mm.

Preferably, the length of the chute is 9-10mm, the width of the chute is 4-6mm, and the thickness of the chute is 4-6mm.

As a preferred embodiment, the digital display tension tester and the stretching electric rod are arranged in the middle of the slider, and the middle part of the vertical plate is provided with a through hole, and the stretching electric rod passes through The through hole is fixed on the outer frame through a nut, and the slider is pulled by adjusting the electric rod so as to apply tension to the fabric.

The bottom surfaces of the first cover plate and the second cover plate are covered with a rubber anti-slip layer for increasing the friction with the fabric.

The first cover plate and the second cover plate clamp the fabric on the corresponding side of the outer frame and the slider through the wrench clamp. Preferably, two sets of wrench clamps are respectively provided on the first cover plate and the second cover plate, and the two sets of wrench clamps are arranged near the two ends of the fabric.

At the same time, the present invention proposes the application of the above-mentioned yarn drawing device in detecting the drawing performance of fabric yarns under different pretensions.

The specific application steps are as follows: Firstly, the two ends of the fabric in one direction are sandwiched inside the outer frame by the first cover plate and the second cover plate respectively, and the first cover plate and the second cover plate are respectively fixed on the outer frame and the second cover plate by using a wrench clamp. Then clamp the whole device on the lower chuck of the tensile testing machine, adjust the length of the rod in the frame by adjusting the electric lever to apply tension to the radial direction of the fabric, and then clamp the yarn that needs to be drawn Pull-out tensile test on the upper chuck

In the present invention, the fabric is clamped between the outer frame and the slider through the first cover plate and the second cover plate, and the slider is pulled at a uniform speed and accurately by adjusting the stretching electric rod to apply different tensions to the fabric. The explicit tension tester reads, and finally the entire drawing device is clamped on the lower chuck of the tensile testing machine, and the yarn to be drawn is clamped on the upper chuck for drawing and tensile testing.

Beneficial effects: Compared with the prior art, the adjustable pre-tension yarn drawing device of the present invention can clamp and fix the fabric in one direction (warp or weft direction), and at the same time, the yarn in the other direction can be clamped and fixed. Pulling stretching, when studying the pulling and stretching of yarns in fabrics, is more in line with the real stress state of yarns in fabrics. After the fabric is fixed on the outer frame by the quick wrench clamp, the pretension can be quantitatively applied to the fabric by adjusting the stretching electric rod, and the tension is measured by a digital display tensiometer. At the same time, the drawing device with adjustable pre-tension can quantitatively study the influence of pre-tension on yarn drawing. The device is easy to use and can be placed arbitrarily on the stretching instrument for measurement.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of the outer frame of the present invention;

In the figure, 1 is the outer frame, 101 is the chute, 102 is the through hole, 103 is the clamping unit; 2 is the slider, 3 is the digital force measuring instrument, 4 is the stretching electric rod, 5 is the quick wrench clamp , 6 is the first cover plate, 7 is the second cover plate, 8 is the fabric, 9 is the yarn, and 10 is the vertical plate.

detailed description

The present invention will be described in detail below through specific examples.

As shown in Figure 1, the present invention proposes a yarn drawing device with adjustable pretension, an outer frame 1 for fixing the fabric, a slider 2 for clamping the fabric, a digital display tension tester 3, a pulling Stretch electric bar 4 and be used for the cover plate of clamping fabric. Wherein, as shown in FIG. 2 , the outer frame 1 is a rectangular hollow frame, the size of the outer frame is 400*200 mm, the frame width a is 30 mm, and the thickness b is 5 mm. Wherein, one of the two short frames is provided with a first cover plate 6 , and the other short frame is a vertical plate 10 . One end of the two long frames close to the vertical plate 10 is respectively provided with a chute 101, the length c of the chute 101 is 10mm, the groove width d is 5mm, and the groove thickness e is 5mm. A slider 2 is erected between the two chute 101, the thickness of the slider is 4.9 mm, and the width is 40 mm. A second cover plate 7 is arranged above the slider, and the first cover plate 6 and the second cover plate 7 pass through The quick wrench clamps 5 respectively fix the two ends of the fabric 8 on the outer frame 1 and the slider 2. In this embodiment, four wrench clamps are provided, which are respectively arranged near the two ends of the fabric. A rubber anti-slip layer is provided on the lower surface of the first cover plate 6 and the second cover plate 7 to increase the friction with the fabric and prevent the fabric from slipping off. The middle part of the slider is connected with a digital display tension tester 3, and the other end of the digital display tension tester 3 is connected with the stretching electric rod 4, and the stretching electric rod 4 is fixed by a nut through the through hole 102 arranged in the middle of the vertical plate On the vertical plate, adjust the length of the bolts in the frame by adjusting the nuts, and then apply tension to the fabric. A clamping unit 103 is provided at the lower end of the long frame for clamping the entire extraction device on the lower clamp of the tensile testing machine.

When in use, at first the two ends of one direction (such as the radial direction) of the fabric are clamped inside the outer frame by the first cover plate and the second cover plate respectively, and the first cover plate and the second cover plate are clamped by using the quick wrench clamp 5 The boards are respectively fixed on the outer frame and the slider, and then the whole device is clamped on the lower chuck of the tensile testing machine, and the length of the rod in the frame is adjusted by adjusting the electric lever to exert tension on the radial direction of the fabric, and then the required pumping The pulled out yarn 9 is clamped on the upper chuck to carry out the pulling out tensile test.

The yarn drawing device with adjustable pretension of the present invention can clamp and fix the fabric in one direction (warp or weft direction), and draw and stretch the yarn in the other direction at the same time. When the thread is drawn and stretched, it is more in line with the real stress state of the yarn in the fabric. After the fabric is fixed on the outer frame by quickly clamping the cover plate, the pretension can be quantitatively applied to the fabric by adjusting the stretching electric rod, and the tension is measured by a digital display tensiometer. At the same time, the drawing device with adjustable pre-tension can quantitatively study the influence of pre-tension on yarn drawing. The device is easy to use and can be placed arbitrarily on the stretching instrument for measurement.

Claims (8)

1. A yarn drawing device with adjustable pretension, characterized in that it comprises an outer frame, a stretching unit and a clamping unit, wherein a pair of opposite sides of the outer frame are respectively provided with a first cover plate and vertical plate, the other pair of opposite sides of the outer frame are respectively provided with a chute at one end close to the vertical plate, a slider that can slide along the chute is erected between the two chute, and the The upper part of the slider is provided with a second cover plate, and the fabric to be processed is clamped inside the outer frame by the first cover plate and the second cover plate; the stretching unit includes a digital display tension tester and a tensile Extending the electric rod, one end of the digital display tension tester is connected with the slider, the other end is connected with one end of the stretching electric rod, and the other end of the stretching electric rod is connected with the vertical plate, The movement of the slider is driven by the stretching electric rod to apply tension to the fabric to be processed; the clamping unit is arranged on one side of the outer frame provided with a chute for clamping in the stretching The lower chuck of the machine. 2. The yarn drawing device with adjustable pretension according to claim 1, characterized in that, the length of the outer frame is 350-450mm, the width is 200-250mm, the frame width is 30-40mm, and the thickness 4~5mm. 3. The yarn drawing device with adjustable pretension according to claim 1, characterized in that, the length of the chute is 9-10mm, the width of the chute is 4-6mm, and the thickness of the chute is 4-6mm. 4. The yarn drawing device with adjustable pretension according to claim 1, characterized in that, the digital display tension tester and the stretching electric rod are arranged in the middle of the slider, and the vertical The middle part of the board is provided with a through hole, and the stretching electric rod passes through the through hole and is fixed on the outer frame by a nut, and the slider is pulled at a uniform speed and accurately by controlling the electric rod to apply tension to the fabric. 5. The yarn drawing device with adjustable pretension according to claim 1, characterized in that, the bottom surfaces of the first cover plate and the second cover plate are covered with a rubber anti-slip layer for increasing the contact with the fabric. friction. 6. The yarn drawing device with adjustable pretension according to claim 1, characterized in that, the first cover plate and the second cover plate clamp the fabric on the corresponding side of the outer frame through a wrench clamp and sliders for quick and easy gripping of fabrics. 7. The application of the yarn drawing device according to claim 1 in detecting the drawing performance of the yarn of the fabric under different pretensions. 8. The application according to claim 7, characterized in that it comprises the following steps: firstly clamp the two ends of the fabric in one direction to the inside of the outer frame by using the first cover plate and the second cover plate respectively, and use the wrench clamp to clamp The first cover plate and the second cover plate are respectively fixed on the outer frame and the slider, and then the whole device is clamped on the lower chuck of the tensile testing machine, and the length of the rod in the frame is adjusted by adjusting the electric rod to adjust the diameter of the fabric. Apply tension to the yarn, and then clamp the yarn that needs to be pulled out on the upper chuck to perform the pulling out stretching test.