A tear resistance testing device for clothing fabrics

Abstract

This application provides a tear resistance testing device for clothing fabrics, belonging to the technical field of tear resistance testing equipment for clothing fabrics. It includes a mounting frame, a first clamp, a second clamp, a measuring light curtain, a controller, and a display. The mounting frame has a guide rail, and the first and second clamps move relative to each other along the extension direction of the guide rail to measure the tear strength of a tongue-shaped sample. The emitting and receiving ends of the measuring light curtain are both positioned across the tongue-shaped sample along its width direction. The emitting and receiving ends are located on both sides of at least one hem of the tongue-shaped sample, and the measuring light curtain moves relative to the corresponding hem along the tear direction of the tongue-shaped sample. This allows the measuring light curtain to measure the cut position of the tongue-shaped sample in real time during the tearing process, improving efficiency while ensuring that inaccurate measurements do not mistakenly identify unqualified data as qualified, thus ensuring the accuracy of the test results.

Description

Technical Field

[0001] This application belongs to the field of tear strength testing technology for clothing fabrics, and more specifically, it relates to a tear resistance testing device for clothing fabrics. Background Technology

[0002] Tear resistance testing of clothing fabrics is a test method used to assess whether a fabric is easily torn when subjected to external force. It is one of the important testing indicators for textile fabrics and directly affects the quality of clothing. Currently, there are various methods for testing the tear resistance of fabrics, such as the impact pendulum method, the trouser method, the trapezoidal method, and the wing method, all of which have corresponding national standards.

[0003] In the national standard GB / T3917.2, the determination of tear strength of tongue-shaped test specimens for the tearing properties of fabrics is a common standard for testing the tear resistance of fabrics. It specifies the test methods for both single-tongue and double-tongue test specimens. By tearing the specimen along a specified cut to a specific tear length, the testing equipment records the tear strength up to the specified tear length, and calculates the tear strength based on the peak value on the curve plotted by an automatic plotter or by an electronic device.

[0004] In actual testing, due to the significant differences between various garment fabrics and the varying directions of their internal weave threads, tear testing is often performed on fabric samples along different weave directions to ensure comprehensive and accurate data. However, because the weave direction can affect the tear direction, the cut edges of some samples, whether single-tongue or double-tongue, may not follow the prescribed straight line after tearing, potentially resulting in… Figures 1 to 3 The diagram shows the tilting and deviation. If the cut deviates significantly from the specified straight line direction, the test data must be discarded.

[0005] Currently, existing testing processes cannot detect whether the tear cut conforms to the testing requirements during the test itself; this can only be achieved through visual inspection or manual measurement after the test is completed. If the cut deviation is small and difficult to detect with the naked eye, samples that do not meet the testing requirements may be included in the test results, leading to inaccurate results. Therefore, there is a need for testing equipment that can detect whether the cut conforms to the specified direction during tear performance testing. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application provides a tear resistance testing device for clothing fabrics, which solves the defect in existing technologies that cannot directly detect whether the torn cut meets the requirements.

[0007] To achieve the above objectives, the technical solution of this application provides a tear resistance testing device for clothing fabrics, including a mounting frame, a first clamp, a second clamp, a controller, and a display. The mounting frame has a guide rail; the first clamp and the second clamp move relative to each other along the extension direction of the guide rail; the first clamp or the second clamp has a tear strength sensor inside; the first clamp or the second clamp is controlled by the controller; and the tear strength sensor and the display are both connected to the controller.

[0008] It also includes a measuring light curtain connected to the controller. The measuring light curtain has a transmitter and a receiver that are opposite to each other. The transmitter and receiver are both arranged across the tongue-shaped sample in the width direction. The transmitter and receiver are located on both sides of at least one trouser edge in the tongue-shaped sample, and the measuring light curtain moves relative to the corresponding trouser edge along the tear direction of the tongue-shaped sample.

[0009] Optionally, the tongue-shaped sample is a double-tongue sample, with the two sides of the tongue-shaped sample being a single side and a double side, respectively, and the transmitting end and the receiving end being located on both sides of the single side.

[0010] Optionally, the tongue-shaped sample is a single-tongue sample, and both sides of the tongue-shaped sample are single-tongue trousers. There are two sets of measurement light curtains, which correspond to and are symmetrically arranged with the two single-tongue trousers respectively. The transmitting end and receiving end of each set of measurement light curtains are located on both sides of the corresponding single-tongue trousers respectively.

[0011] Optionally, the guide rail is a horizontal guide rail, the root of the tongue-shaped sample away from the cut is a free hanging end, and the top of the mounting frame is provided with a receiving cavity for accommodating the free hanging end. The side wall of the receiving cavity is shielded between the measuring light curtain and the free hanging end.

[0012] Optionally, both the first and second clamps are slidably mounted on the guide rail, and the measuring light curtain is fixedly connected to the mounting frame. The first and second clamps move in opposite directions at the same speed along the guide rail to tear the tongue-shaped sample.

[0013] Optionally, the first clamp is fixedly connected to the mounting frame, the second clamp is slidably mounted on the guide rail, the mounting frame is equipped with a drive device and a slide rail parallel to the guide rail, a slide plate is slidably mounted on the slide rail, the output end of the drive device is fixedly connected to the slide plate to drive the slide plate to move along the slide rail, and the drive device is controlled by a controller.

[0014] The measuring light curtain is fixedly installed on the slide plate, and the receiving cavity is located on the slide plate. When the sample is torn, the slide plate and the second clamp move in the same direction away from the first clamp, and the movement speed of the slide plate is half the movement speed of the second clamp.

[0015] Optionally, the drive unit is a lead screw motor or a push rod motor.

[0016] The advantages of the technical solution in this application compared to the prior art are as follows:

[0017] The first and second grippers are used to tear the tongue-shaped sample, and the tear strength is measured by a tear force sensor. A measuring light curtain moves relative to the corresponding hem along the tear direction of the tongue-shaped sample to measure whether the tear conforms to the specified orientation. If the hem width or inclination changes more than a predetermined value along the tear direction, the surface tear is considered misaligned, and the test result for that tongue-shaped sample is invalid. The measuring light curtain can measure the position of the tear in real time during the tearing process, eliminating the need for manual measurement after tearing. It can also identify deviations that are difficult to judge visually, improving efficiency while ensuring that inaccurate measurements do not lead to the misinterpretation of non-compliant data as compliant, thus ensuring the accuracy of the test results. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the first type of deviation structure of the double-tongue sample cut;

[0020] Figure 2 This is a schematic diagram of the second type of deviation structure of the double-tongue sample cut;

[0021] Figure 3 This is a schematic diagram of the structure where the cut of a single-tongue sample deviates from its intended shape.

[0022] Figure 4 This is a schematic diagram of the double-tongue sample structure;

[0023] Figure 5 This is a schematic diagram of the first tear resistance testing device for clothing fabrics with double tongues.

[0024] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0025] Figure 7 This is a coordinate graph showing the incision location and tear length of a double-tongue sample.

[0026] Figure 8 A front view of the structure of the second type of tear resistance testing equipment for clothing fabrics with double tongues;

[0027] Figure 9 This is a schematic diagram of a single-tongue sample structure.

[0028] Figure 10This is a schematic diagram of the first tear resistance testing device for clothing fabrics with a single tongue sample.

[0029] Figure 11 for Figure 10 Enlarged view of a section at point B in the middle;

[0030] Figure 12 This is a coordinate graph showing the incision location and tear length of a single-tongue sample.

[0031] Figure 13 This is a schematic diagram of the structure of a tear resistance testing device for clothing fabrics using a second type of single-tongue sample.

[0032] Icons: 10. Double-tongue specimen; 11. Single-sided trouser hem; 12. Double-sided trouser hem; 13. Single-tongue specimen; 14. Single-tongue trouser hem; 15. Free hanging end; 16. Inner side; 17. Outer side; 101. Mounting bracket; 102. First clamp; 103. Second clamp; 104. Guide rail; 105. Measuring light curtain; 106. Transmitter; 107. Receiver; 108. Receiving cavity; 109. Drive device; 110. Slide rail; 111. Slide plate. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application. Example

[0034] This embodiment provides a tear resistance testing device for clothing fabrics, based on... Figure 5 and Figure 6 As shown, the device includes a mounting frame 101, a first gripper 102, a second gripper 103, a controller, and a display. The mounting frame 101 has a guide rail 104, and the first gripper 102 and the second gripper 103 move relative to each other along the extension direction of the guide rail 104. The first gripper 102 and the second gripper 103 are respectively used to grip the two ends of a tongue-shaped sample and move relative to each other along the guide rail 104 in opposite directions to tear the tongue-shaped sample. A tear-force sensor is located within either the first gripper 102 or the second gripper 103. The first gripper 102 or the second gripper 103 is controlled by the controller to move relative to each other along the guide rail 104. The tear-force sensor and the display are both connected to the controller (the controller, display, and tear-force sensor are not shown in the attached diagram). The tear-force sensor measures the tear strength of the tongue-shaped sample, and the controller analyzes the test data and generates a strength-elongation curve displayed on the display. The above structures are all the same as those of existing testers used to measure the tear strength of fabrics, and will not be described in detail again.

[0035] Based on the above structure, a measuring light curtain 105 connected to the controller is also included. The measuring light curtain 105 has a transmitter 106 and a receiver 107 facing each other. Both the transmitter 106 and the receiver 107 are arranged across the tongue-shaped sample along the width direction. The transmitter 106 and the receiver 107 are respectively located on both sides of at least one hem of the tongue-shaped sample, and the measuring light curtain 105 moves relative to the corresponding hem along the tear direction of the tongue-shaped sample. In this way, by measuring the position of the cut relative to the zero point of the measuring light curtain 105, or by measuring the width of the hem, it is possible to detect whether the cut has deviated and determine whether the test results meet the test requirements.

[0036] In detail, in this embodiment, based on Figure 4 As shown Figure 7 As shown, the tongue-shaped sample being tested is a double-tongue sample 10, with one side 11 and the other side 12. The root of the double-tongue sample 10, furthest from the one side 11 and the side 12, is in a free-hanging state when torn; this end is called the free-hanging end 15. For the double-tongue sample 10, a set of measuring light curtains 105 is used, with its emitting end 106 and receiving end 107 located on either side of the one side 11. A first clamp 102 clamps the side 12, and a second clamp 103 clamps the one side 11. The first clamp 102 and the second clamp 103 are positioned far apart to tear the tongue-shaped sample. The measuring light curtain 105 is only set on one side of the trouser hem 11 because both sides of the single-sided trouser hem 11 are tear cuts. During the tearing process, the two sides of the single-sided trouser hem 11 are relatively symmetrically stressed, and wrinkles or twisting will not occur due to uneven stress. Moreover, measuring the inclination of the cuts on both sides of the single-sided trouser hem 11 can completely determine whether the cuts extend in the prescribed direction. However, for the double-sided trouser hem 12, its inner side 16 is stretched as a cut, while the outer side 17 is not a cut. The uneven stress on both sides during the tearing process will cause wrinkles or twisting of the double-sided trouser hem 12 when pulled, resulting in inaccurate width measurement. Therefore, it is unnecessary to set an additional measuring light curtain 105 for detection on the double-sided trouser hem 12. At the same time, the guide rail 104 is a horizontal guide rail 104. During actual tearing, the free hanging end 15 will twist and deform near the cut due to uneven force on both sides, and some stiffer fabrics may curl up, making the free hanging end 15 not strictly hanging. Therefore, a receiving cavity 108 is provided at the top of the mounting bracket 101 to accommodate the free hanging end 15. The side wall of the receiving cavity 108 blocks the measurement light curtain 105 and the free hanging end 15. In this way, the free hanging end 15 will not be blocked in the light path between the transmitting end 106 and the receiving end 107 due to deformation, thus avoiding interference with the measurement.

[0037] In this embodiment, both the first gripper 102 and the second gripper 103 are slidably mounted on the guide rail 104. The measuring light curtain 105 is fixedly connected to the mounting bracket 101. The first gripper 102 and the second gripper 103 move in opposite directions at the same speed along the guide rail 104 to tear the tongue-shaped sample. During the tearing process, one side of the pant edge 11 passes through the measuring path between the transmitting end 106 and the receiving end 107, achieving relative movement with the measuring light curtain 105. The measuring light curtain 105 detects the torn pant edge 11 along the tear length direction. The detection data is processed by the data processing device in the controller, and a side position-tear length curve is generated on the display screen. Based on Figure 7 As shown, the side position-tear length curve uses one end of the measuring light curtain 105 as the zero point. The horizontal axis represents the tear length X, which is the distance the single hem 11 moves relative to the measuring light curtain 105. The vertical axis represents the coordinates A and B of the two cuts on both sides of the single hem 11 relative to the zero point. It has two data processing methods.

[0038] Method 1: At any tear length X0, the absolute value of the difference between the coordinates A0 and B0 of the two cuts relative to the zero point is the width m of the single-sided hem 11 at that tear length. If the difference between m and the standard width of the single-sided hem 11 exceeds the specified value, then the single-sided hem 11 has narrowed or widened excessively during the tearing process, and the test result is invalid. The width m of the single-sided hem 11 at any position can be calculated in real time by the controller and displayed on the screen. If it exceeds the specified value, it can also be specially displayed to show the operator's body shape.

[0039] Method 2: The maximum and minimum values ​​of the coordinates A and B of the two side cuts relative to the zero point position along the tear length X direction are respectively A max A min B max B min If A max With A min Or B max With B min The presence of a difference indicates that the corresponding incision is deviated. If A max With A min The difference or B max With B min If the difference exceeds the specified standard value, the surface cut is excessively skewed, and the test result is invalid. During the testing process, A max With A min The difference and B max With B min The difference can be calculated in real time by the controller and displayed on the screen. If the value exceeds the specified value, it can also be specially displayed to remind the operator.

[0040] The technical solution of this application, by adding a measuring light curtain 105, can measure the cut position of the tongue-shaped sample in real time during the tearing process, without the need for manual measurement after tearing. At the same time, it can also identify the skew that is difficult to judge by visual inspection, thereby improving efficiency and ensuring that unqualified measurement data will not be mistakenly identified as qualified due to inaccurate measurement, thus ensuring the accuracy of the test results. Example

[0041] This embodiment provides a tear resistance testing device for clothing fabrics, also used for testing double-tongue samples 10. The difference from the structure in Embodiment 1 is that it is based on... Figure 4 and Figure 8 As shown, the first clamp 102 is fixedly connected to the mounting bracket 101, and the second clamp 103 is slidably disposed on the guide rail 104. This is because for some testing instruments, it is common to tear the sample by having one clamp fixed and the other clamp slide along the guide rail 104. The first clamp 102 is used to clamp the double-sided hem 12, and the second clamp 103 is used to clamp the single-sided hem 11. When the second clamp 103 tears the single-sided hem 11 at a speed V1, the free hanging end 15 moves in the same direction as the second clamp 103 at half the speed V1. Therefore, to ensure the normal operation of the test, the settings of the measuring light curtain 105 and the receiving cavity 108 need to be adjusted.

[0042] In detail, in this embodiment, based on Figure 8 As shown, a drive device 109 and a slide rail 110 parallel to the guide rail 104 are mounted on the mounting bracket 101. A slide plate 111 is slidably mounted on the slide rail 110. The output end of the drive device 109 is fixedly connected to the slide plate 111 to drive the slide plate 111 to move along the slide rail 110. The drive device 109 is controlled by a controller. The drive device 109 can be a lead screw motor or a push rod motor. The measuring light curtain 105 is fixedly mounted on the slide plate 111. The receiving cavity 108 is located on the slide plate 111. When tearing the sample, the slide plate 111 and the second clamp 103 both move in the same direction away from the first clamp 102, and the movement speed of the slide plate 111 is half the movement speed of the second clamp 103. In this way, the position of the slide plate 111 is relatively stationary with respect to the position of the free hanging end 15, and the free hanging end 15 can always be inserted into the free hanging end 15. Meanwhile, the moving speed of the measuring light curtain 105 is half the moving speed of the single pant edge 11, so as to realize the relative movement of the measuring light curtain 105 and the single pant edge 11 along the tearing direction. The measuring light curtain 105 detects the single pant edge 11, and the data processing method is the same as in Example 1, so it will not be described again. Example

[0043] This embodiment provides a tear resistance testing device for clothing fabrics, used for testing... Figure 9The single-tongue sample 13 shown has two single-tongue trouser edges 14. The tear resistance testing device for clothing fabric in this embodiment differs from that in Embodiment 1 only in that the measuring light curtain 105 has two sets. The two sets of measuring light curtains 105 correspond to and are symmetrically arranged with the two single-tongue trouser edges 14, that is, the two sets of measuring light curtains 105 are symmetrically arranged on both sides of the free hanging end 15. The transmitting end 106 and the receiving end 107 of each set of measuring light curtains 105 are located on both sides of the corresponding single-tongue trouser edge 14.

[0044] In this embodiment, the first gripper 102 and the second gripper 103 move in opposite directions at the same speed along the guide rail 104 to tear the tongue-shaped sample. During the tearing process, the two single-tongue edges 14 pass through the measurement path between the transmitting end 106 and the receiving end 107 of the two sets of measuring light curtains 105, respectively, realizing relative movement with the corresponding measuring light curtains 105. The two sets of measuring light curtains 105 detect the two torn single-tongue edges 14 along the tear length direction. Since the two sets of measuring light curtains 105 are symmetrically arranged, the width of the two single-tongue edges 14 at the same tear position can be measured simultaneously during the tearing process.

[0045] For the single-tongue sample 13, it is necessary to measure both single-tongue edges 14 separately using two sets of measuring light curtains 105, rather than measuring only one single-tongue edge 14. This is because, during the tearing process, the single-tongue edge 14 only has one cut, with its inner side 16 acting as the cut and subjected to tension, while the outer side 17 is not a cut. The uneven force on both sides during tearing causes the single-tongue edge 14 to wrinkle or twist during pulling, resulting in inaccurate width measurement. However, since the two single-tongue edges 14 are symmetrical and the tongue-shaped sample meets the material uniformity standard, by measuring the width of the two single-tongue edges 14 at the same tearing position using two sets of measuring light curtains 105 and calculating the width difference between the two single-tongue edges 14 at the same tearing position, it is possible to determine whether the cut has deviated.

[0046] In detail, based on Figure 12As shown, the detection data is processed by the data processing device in the controller, and two side position-tear length curves of the single-tongue pant edge 14 are generated on the display screen. The side position-tear length curve takes one end of the measuring light curtain 105 as the zero point, the horizontal axis is the tear length X, that is, the moving distance of the single-tongue pant edge 14 relative to the measuring light curtain 105, and the vertical axis is the coordinate value of the side of the single-tongue pant edge 14 relative to the zero point. For the left single-tongue pant edge 14, the coordinate values ​​of its two sides at any tear length position X1 are C1 and C2, respectively. Then, the width p of the left single-tongue pant edge 14 at the tear length position X1 is the absolute value of the difference between C1 and C2. For the right single-tongue pant edge 14, the coordinate values ​​of its two sides at the same tear length position X1 are D1 and D2, respectively. Then, the width q of the right single-tongue pant edge 14 at the tear length position X1 is the absolute value of the difference between D1 and D2. The data processing device in the controller compares the sizes of p and q. If the absolute value of the difference between the sizes of p and q at a certain tear length position exceeds the specified value, then the surface cut position has deviated excessively at that point, and the test result is invalid.

[0047] During the testing process, the values ​​of p and q, as well as the absolute value of the difference between p and q, can be calculated in real time and displayed on the screen by the controller. It can also help generate the absolute value of the difference between p and q - tear length curve. If the value exceeds the specified value, it can be specially displayed to remind the operator. Example

[0048] This embodiment provides a tear resistance testing device for clothing fabrics, achieving the same method as in Embodiment 2, where one clamp is fixed and another clamp slides along guide rail 104 to tear the sample. The difference between this embodiment and Embodiment 2 is that this embodiment is used to test single-tongue sample 13.

[0049] based on Figure 9 and Figure 13As shown, the difference between this embodiment and Embodiment 2 is that the measuring light curtain 105 has two sets, both sets of measuring light curtain 105 are fixedly installed on the top of the slide plate 111, and the two sets of measuring light curtain 105 are symmetrically arranged on both sides of the receiving cavity 108. When the second clamp 103 drives one of the single-tongue trouser edge 14 to tear at a speed V1, the free hanging end 15 moves in the same direction as the second clamp 103 at half the speed V1. When tearing the sample, the slide plate 111 and the second clamp 103 both move in the same direction away from the first clamp 102, and the movement speed of the slide plate 111 is half the movement speed V1 of the second clamp 103. In this way, the position of the slide plate 111 is relatively stationary with respect to the position of the free hanging end 15, and the free hanging end 15 can always be inserted. Simultaneously, both measuring light curtains 105 move relative to the corresponding single-tongue trouser edge 14 at half the movement speed V1 of the second clamp 103, thereby enabling the measuring light curtains 105 to detect the width of the single-tongue trouser edge 14. The specific data processing method in this embodiment is the same as in embodiment 3, and will not be repeated here.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tear resistance testing device for clothing fabrics, comprising a mounting frame, a first clamp, a second clamp, a controller, and a display, wherein the mounting frame has a guide rail; the first clamp and the second clamp move relative to each other along the extension direction of the guide rail, the first clamp or the second clamp has a tear strength sensor inside, the first clamp or the second clamp is controlled by the controller, and the tear strength sensor and the display are both connected to the controller; Its features are: It also includes a measuring light curtain connected to the controller, the measuring light curtain having a transmitter and a receiver facing each other, the transmitter and the receiver being arranged across the tongue-shaped sample along the width direction, the transmitter and the receiver being located on both sides of at least one trouser edge of the tongue-shaped sample, and the measuring light curtain moving relative to the corresponding trouser edge along the tear direction of the tongue-shaped sample.

2. The tear resistance testing equipment for clothing fabrics as described in claim 1, characterized in that: The tongue-shaped sample is a double-tongue sample, with the two sides of the tongue-shaped sample being a single-sided trouser side and a double-sided trouser side, respectively. The transmitting end and the receiving end are located on both sides of the single-sided trouser side. The detection data is processed by the data processing unit in the controller and a side position-tear length curve is generated on the display screen. The side position-tear length curve takes one end of the measuring light curtain as the zero point, the horizontal axis is the tear length X, that is, the distance the single hem moves relative to the measuring light curtain, and the vertical axis is the coordinate values ​​A and B of the two cuts on the single hem relative to the zero point. It has two data processing methods: Method 1: At any tear length X0, the absolute value of the difference between the coordinate values ​​A0 and B0 of the two cuts on both sides relative to the zero point is the width m of the single hem at that tear length. If the difference between m and the standard width of the single hem exceeds the specified value, then the single hem on the surface has narrowed or widened excessively during the tearing process, and the test result is invalid. Method 2: The maximum and minimum values ​​of the coordinates A and B of the two side cuts relative to the zero point position along the tear length X direction are respectively A max A min B max B min， If A max With A min Or B max With B min The presence of a difference indicates that the corresponding incision is deviated; if A max With A min The difference or B max With B min If the difference exceeds the specified standard value, the surface cut is excessively skewed, and the test result is invalid.

3. The tear resistance testing equipment for clothing fabrics as described in claim 1, characterized in that: The tongue-shaped sample is a single-tongue sample, and both sides of the tongue-shaped sample are single-tongue trouser edges. There are two sets of measurement light curtains, and the two sets of measurement light curtains correspond to and are symmetrically arranged with the two single-tongue trouser edges respectively. The transmitting end and the receiving end of each set of measurement light curtains are located on both sides of the corresponding single-tongue trouser edge respectively. The detection data is processed by the data processing device in the controller, and two side position-tear length curves for the single-lip hem are generated on the display screen. The side position-tear length curve uses one end of the measuring light curtain as the zero point. The horizontal axis represents the tear length, i.e., the distance the single-lip hem moves relative to the measuring light curtain, and the vertical axis represents the coordinate value of the side of the single-lip hem relative to the zero point. For the left single-lip hem, the coordinate values ​​of its two sides at any tear length position X1 are C1 and C2 respectively. Therefore, the tear length of the left single-lip hem... The width p at position X1 is the absolute value of the difference between C1 and C2; for the right single-tongue pant edge, the coordinates of its two sides at the same tear length position X1 are D1 and D2 respectively, then the width q of the right single-tongue pant edge at tear length position X1 is the absolute value of the difference between D1 and D2; the data processing device in the controller compares the values ​​of p and q. If the absolute value of the difference between the values ​​of p and q at a certain tear length position exceeds the specified value, then the surface cut position has deviated excessively at that point, and the test result is invalid.

4. The tear resistance testing equipment for clothing fabrics as described in claim 2 or 3, characterized in that: The guide rail is a horizontal guide rail, and the root of the tongue-shaped sample away from the cut is a free hanging end. The top of the mounting frame has a receiving cavity for accommodating the free hanging end, and the side wall of the receiving cavity shields the measuring light curtain and the free hanging end.

5. The tear resistance testing device for clothing fabrics as described in claim 4, characterized in that: Both the first clamp and the second clamp are slidably disposed on the guide rail. The measuring light curtain is fixedly connected to the mounting frame. The first clamp and the second clamp move in opposite directions at the same speed along the guide rail to tear the tongue-shaped sample.

6. The tear resistance testing device for clothing fabrics as described in claim 4, characterized in that: The first clamp is fixedly connected to the mounting frame, the second clamp is slidably disposed on the guide rail, the mounting frame is equipped with a drive device and a slide rail parallel to the guide rail, a slide plate is slidably disposed on the slide rail, the output end of the drive device is fixedly connected to the slide plate to drive the slide plate to move along the slide rail, and the drive device is controlled by the controller. The measuring light curtain is fixedly installed on the slide plate, and the receiving cavity is located on the slide plate. When the sample is torn, the slide plate and the second clamp both move in the same direction away from the first clamp, and the movement speed of the slide plate is half the movement speed of the second clamp.

7. The tear resistance testing device for clothing fabrics as described in claim 6, characterized in that: The drive device is a lead screw motor or a push rod motor.

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