A fixture, device and method for testing the tensile properties of fabrics

Abstract

The invention provides a clamp for testing the tensile properties of fabrics, and relates to the field of testing the tensile properties of fabrics; the clamp comprises: a base, at least two guide rods, a first clamping block, a second clamping block, a pressing assembly, a first movable block and a second movable block; the guide rod is vertically arranged on one side of the base; the first clamping block and the second clamping block are respectively provided with a first through hole and a second through hole; the first clamping block and the second clamping block are movably arranged on the guide rod; the first clamping block and the second clamping block are respectively provided with a first semicircular groove and a second semicircular groove; the pressing assembly is arranged at one end of the guide rod, and is used for pressing the first clamping block on one side of the second clamping block; the first movable block and the second movable block are both semi-cylindrical; the invention also proposes an apparatus and a method for testing the tensile properties of fabrics, which can effectively improve the clamping force on the fabric to be tested and prevent the fabric to be tested from slipping out of the clamp.

Description

Technical Field

[0001] The invention relates to the field of fabric tensile performance testing, and in particular to a fixture, equipment and method for fabric tensile performance testing. Background Art

[0002] The tensile properties of fabrics refer to the mechanical deformation law of fabrics when they are stretched by external forces along the warp and weft directions. The test methods for the tensile properties of fabrics include the strip method with the edge yarn removed, the grab method without removing the edge yarn, the shear strip method, the trapezoidal method, and the ring strip method. The test indicators for the tensile properties of fabrics include breaking strength, breaking elongation, breaking work, load at a constant elongation, elongation at a constant load, etc. Among them, breaking strength is one of the main indicators for evaluating the intrinsic quality of fabrics.

[0003] When the strip method is used to test the tensile strength of a fabric, firstly, the two ends of the fabric to be tested are clamped by the upper and lower clamps in the fabric tensile performance testing equipment respectively; then, the fabric tensile performance testing equipment applies traction to the upper and lower clamps respectively to stretch the fabric to be tested until the fabric to be tested breaks, thereby obtaining the breaking strength of the fabric to be tested.

[0004] When the existing fabric tensile performance testing equipment is used to test the fabric to be tested, the fabric to be tested is easy to slip out of the fixture, resulting in failure to detect the breaking strength of the fabric to be tested. Summary of the invention

[0005] The invention aims to solve the technical problem that when the existing fabric tensile performance testing equipment tests the tensile performance of the fabric to be tested, the fabric to be tested is easy to slip out of the clamp, resulting in failure to detect the breaking strength of the fabric to be tested.

[0006] The present invention provides a clamp for testing the tensile properties of fabrics, comprising: a base, at least two guide rods, a first clamping block, a second clamping block, a pressing assembly, a first movable block and a second movable block;

[0007] The guide rod is vertically arranged on one side of the base;

[0008] The first clamping block and the second clamping block are respectively provided with a first through hole and a second through hole used in conjunction with the guide rod; the first clamping block and the second clamping block are respectively movably arranged on the guide rod through the first through hole and the second through hole; the first clamping block and the second clamping block are respectively provided with a first semicircular groove and a second semicircular groove;

[0009] The pressing assembly is arranged at one end of the guide rod, and is used to press the first clamping block against one side of the second clamping block, so that the first semicircular groove cooperates with the second semicircular groove to form a circular accommodation space with two ends open;

[0010] The first movable block and the second movable block are both semi-cylindrical; the first movable block cooperates with the second movable block to form a columnar clamp used in conjunction with the circular accommodating space; the columnar clamp is used to clamp and wind the fabric to be tested and then be inserted into the circular accommodating space; the first clamping block, the second clamping block, the first movable block and the second movable block cooperate to wind and clamp the fabric to be tested.

[0011] Furthermore, the clamping assembly includes a mounting plate and a lead screw; the mounting plate is detachably arranged on one end of the guide rod; the mounting plate is provided with a threaded through hole used in conjunction with the lead screw; the lead screw is passed through the threaded through hole; an abutment block is provided at one end of the lead screw for abutting with the first clamping block; a handwheel is provided at the other end of the lead screw.

[0012] Furthermore, a connecting rod is provided on one end of the guide rod away from the base; a threaded portion is provided at one end of the connecting rod; a mounting hole used in conjunction with the connecting rod is provided on the mounting plate; the mounting plate is provided on the connecting rod through the mounting hole; a nut is provided on the threaded portion, which is used to cooperate with the guide rod to fix the mounting plate on the connecting rod.

[0013] Furthermore, the length of the columnar clamping member is greater than the length of the circular accommodating space, so that the columnar clamping member can protrude from both ends of the circular accommodating space respectively.

[0014] Furthermore, first anti-slip grooves are respectively arranged on the outer side walls of the first movable block and the second movable block; second anti-slip grooves are respectively arranged on the inner side walls of the first semicircular groove and the second semicircular groove.

[0015] The present invention also provides a device for testing the tensile properties of fabrics, comprising two of the above-mentioned clamps for testing the tensile properties of fabrics, respectively used for clamping two ends of the fabric to be tested.

[0016] The present invention also provides a testing method using the above-mentioned device for testing the tensile properties of fabrics, comprising the following steps:

[0017] S1, clamping one end of the fabric to be tested in the columnar clamping piece on the fixture for fabric tensile property testing by cooperating with the first movable block and the second movable block, and making the fabric to be tested be wound on the outer side wall of the columnar clamping piece;

[0018] S2, inserting the columnar clamping member wound with the fabric to be tested into the circular accommodating space, and squeezing the first clamping block onto one side of the second clamping block through the pressing assembly, thereby cooperating with the first movable block and the second movable block to wind and clamp one end of the fabric to be tested;

[0019] S3, repeating step S1 and step S2, winding and clamping the other end of the fabric to be tested by another clamp for fabric tensile property testing, and then performing the tensile property test of the fabric to be tested.

[0020] The beneficial effects of the technical solution provided by the embodiment of the present invention are as follows: the fixture for testing the tensile properties of fabrics in the embodiment of the present invention comprises: a base, at least two guide rods, a first clamping block, a second clamping block, a pressing assembly, a first movable block and a second movable block; the guide rod is vertically arranged on one side of the base; the first clamping block and the second clamping block are respectively provided with a first through hole and a second through hole used in conjunction with the guide rod; the first clamping block and the second clamping block are respectively movably arranged on the guide rod through the first through hole and the second through hole; the first clamping block and the second clamping block are respectively provided with a first semicircular groove and a second semicircular groove; the pressing assembly is arranged at one end of the guide rod, and is used to press the first clamping block against one side of the second clamping block, so that the first semicircular groove cooperates with the second semicircular groove to form a circular accommodating space with openings at both ends; The first movable block and the second movable block are both semi-cylindrical; the first movable block cooperates with the second movable block to form a columnar clamp used in conjunction with the circular accommodating space; when in use, the fabric to be tested is clamped between the first movable block and the second movable block by the columnar clamp, and the fabric to be tested is wound on the outer wall of the columnar clamp; then the columnar clamp with the fabric to be tested wound is inserted into the circular accommodating space; then the first clamping block is squeezed against one side of the second clamping block by the clamping assembly, so that the first clamping block, the second clamping block, the first movable block and the second movable block cooperate to wind and clamp one end of the fabric to be tested; clamping the fabric to be tested by winding can effectively improve the clamping force of the fabric to be tested, thereby preventing the fabric to be tested from slipping out of the clamp, and solving the technical problem that the breaking strength of the fabric to be tested cannot be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a fixture used for testing the tensile properties of fabrics in a certain embodiment of the present invention;

[0022] Figure 2 for Figure 1 A top view of the fixture used for testing the tensile properties of fabrics;

[0023] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the fixture used for testing the tensile properties of fabrics;

[0024] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the lead screw 6 in the fixture for testing the tensile properties of fabrics;

[0025] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the mounting plate 5 in the fixture for testing the tensile properties of fabrics;

[0026] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the first clamping block 4 in the clamp used for testing the tensile properties of fabrics;

[0027] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of the second clamping block 3 in the clamp used for testing the tensile properties of fabrics;

[0028] Figure 8 for Figure 1 A schematic diagram of the three-dimensional structure of the guide rod 2 in the fixture used for testing the tensile properties of fabrics;

[0029] Fig. 9 for Figure 1 Reference diagram of the use status of the fixture used for fabric tensile performance testing;

[0030] Fig.10 for Figure 1 Another reference diagram of the use state of the fixture used for fabric tensile performance testing;

[0031] Fig.11 for Fig.10 Schematic diagram of the cross-section structure in the AA direction;

[0032] Among them, 100, a fixture for testing the tensile properties of fabrics; 1, a base; 11, a mounting portion; 2, a guide rod; 21, a connecting rod; 22, a threaded portion; 3, a second clamping block; 31, a second semicircular groove; 32, a second through hole; 4, a first clamping block; 41, a first semicircular groove; 42, a first through hole; 5, a mounting plate; 51, a threaded through hole; 52, a mounting hole; 6, a lead screw; 61, abutment block; 62, a handwheel; 7, a second movable block; 8, a first movable block; 200, a fabric to be tested. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0034] Please refer to Figures 1 to 8 , an embodiment of the present invention provides a fixture for testing the tensile properties of fabrics, comprising: a base 1, at least two guide rods 2, a first clamping block 4, a second clamping block 3, a pressing assembly, a first movable block 8 and a second movable block 7;

[0035] The guide rod 2 is vertically arranged on one side of the base 1; the base 1 is provided with a mounting portion 11 for mounting the fixture for fabric tensile properties testing on a fabric tensile properties testing device;

[0036] The first clamping block 4 and the second clamping block 3 are respectively provided with a first through hole 42 and a second through hole 32 used in conjunction with the guide rod 2; the first clamping block 4 and the second clamping block 3 are respectively movably arranged on the guide rod 2 through the first through hole 42 and the second through hole 32, so that the first clamping block 4 and the second clamping block 3 can move back and forth along the guide rod 2; the first clamping block 4 and the second clamping block 3 are respectively provided with a first semicircular groove 41 and a second semicircular groove 31; the first semicircular groove 41 and the second semicircular groove 31 can cooperate to form a circular accommodating space with openings at both ends;

[0037] The clamping assembly is disposed at one end of the guide rod 2, and is used to clamp the first clamping block 4 on one side of the second clamping block 3, so that the first semicircular groove 41 cooperates with the second semicircular groove 31 to form the circular accommodation space;

[0038] The first movable block 8 and the second movable block 7 are both semi-cylindrical; the first movable block 8 cooperates with the second movable block 7 to form a columnar clamp used in conjunction with the circular accommodating space; the columnar clamp is used to clamp and wind the fabric to be tested and then inserted into the circular accommodating space; the first clamping block 4, the second clamping block 3, the first movable block 8 and the second movable block 7 cooperate to wind and clamp the fabric to be tested; the outer diameter of the columnar clamp is slightly smaller than the outer diameter of the circular accommodating space; when the columnar clamp clamps and winds the fabric to be tested, its outer diameter is slightly larger than the inner diameter of the circular accommodating space, so that the columnar clamp clamping and winding the fabric to be tested is inserted into the circular accommodating space, and when the first clamping block 4 is squeezed on one side of the second clamping block 3 by the clamping assembly, the first clamping block 4, the second clamping block 3, the first movable block 8 and the second movable block 7 cooperate to effectively clamp the fabric to be tested.

[0039] Exemplarily, in this embodiment, the number of the guide rods 2 is four; the four guide rods 2 are vertically arranged on one side of the base 1 .

[0040] Specifically, refer to Figure 1 and Figure 4The clamping assembly includes a mounting plate 5 and a lead screw 6; the mounting plate 5 is detachably arranged at one end of the guide rod 2; a threaded through hole 51 for use with the lead screw 6 is arranged on the mounting plate 5; the lead screw 6 is inserted into the threaded through hole 51; an abutment block 61 is arranged at one end of the lead screw 6 for abutting against the first clamping block 4; a hand wheel 62 is arranged at the other end of the lead screw 6.

[0041] Specifically, a connecting rod 21 is provided on the end of the guide rod 2 away from the base 1; the connecting rod 21 is coaxially arranged with the guide rod 2 and formed as one piece; a threaded portion 22 is provided on the end of the connecting rod 2 away from the guide rod 2; a mounting hole 52 used in conjunction with the connecting rod 21 is provided on the mounting plate 5; the mounting plate 5 is arranged on the connecting rod 21 through the mounting hole 52; a nut is provided on the threaded portion 22, which is used to cooperate with the guide rod 2 to fix the mounting plate 5 on the connecting rod 21.

[0042] Exemplarily, in this embodiment, the length of the columnar clamping member is greater than the length of the circular accommodating space, so that the columnar clamping member can protrude from both ends of the circular accommodating space respectively.

[0043] In order to improve the anti-slip performance of the first movable block 8, the second movable block 7, the first semicircular groove 41 and the second semicircular groove 31, and further improve the clamping performance of the clamp used for fabric tensile performance testing, the first movable block 8 and the second movable block 7 are respectively provided with first anti-slip patterns on their outer side walls; the first semicircular groove 41 and the second semicircular groove 31 are respectively provided with second anti-slip patterns on their inner side walls.

[0044] The present invention also provides a device for testing the tensile properties of fabrics, comprising two of the above-mentioned clamps for testing the tensile properties of fabrics, respectively used for clamping two ends of the fabric to be tested.

[0045] It should be noted that the equipment for testing the tensile properties of fabrics belongs to the prior art, so its specific structure will not be described in detail here; when in use, the two clamps for testing the tensile properties of fabrics in this embodiment can be directly installed on the existing equipment for testing the tensile properties of fabrics.

[0046] refer to Figures 9 to 11 The method for testing the tensile properties of fabrics using the above-mentioned device for testing the tensile properties of fabrics comprises the following steps:

[0047] S1, clamping one end of the fabric 200 to be tested in the columnar clamping piece on a fixture 100 for fabric tensile property testing by cooperating with the first movable block 8 and the second movable block 7, and winding the fabric 200 to be tested on the outer side wall of the columnar clamping piece;

[0048] S2, inserting the columnar clamping member with the fabric 200 to be tested wound thereon into the circular accommodation space, and squeezing the first clamping block 4 onto one side of the second clamping block 3 through the clamping assembly, thereby cooperating with the first movable block 8 and the second movable block 7 to wind and clamp one end of the fabric 200 to be tested;

[0049] S3, repeating steps S1 and S2, winding and clamping the other end of the fabric 200 to be tested by another clamp 100 for fabric tensile property testing, and then performing a tensile property test on the fabric 200 to be tested.

[0050] The breaking strength of polytetrafluoroethylene fiber (PTFE) fabric, polyphenylene sulfide fiber (PPS) fabric, glass fiber fabric, acrylic fabric and aramid fabric was tested by the fabric tensile property testing method of the equipment for fabric tensile property testing in this embodiment. The results are shown in the following table:

[0051] Table 1. Test results of polytetrafluoroethylene fiber fabrics

[0052]

[0053] Table 2. Test results of polyphenylene sulfide fiber fabrics

[0054]

[0055] Table 3. Test results of glass fiber fabric, acrylic fabric and aramid fabric

[0056]

[0057]

[0058] It can be seen from the test results in the above table that the fixture, equipment and method for testing the tensile properties of fabrics in this embodiment can effectively prevent the fabric to be tested from slipping out of the fixture, thereby solving the technical problem of failing to detect the breaking strength of the fabric to be tested.

[0059] For matters not mentioned above, the prior art applies.

[0060] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0061] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for testing a device for testing the tensile properties of fabrics, characterized in that: The device comprises two clamps, which are respectively used to clamp the two ends of the fabric to be tested, and the clamps comprise: a base, at least two guide rods, a first clamping block, a second clamping block, a pressing assembly, a first movable block and a second movable block; The guide rod is vertically arranged on one side of the base; The first clamping block and the second clamping block are respectively provided with a first through hole and a second through hole used in conjunction with the guide rod; the first clamping block and the second clamping block are respectively movably arranged on the guide rod through the first through hole and the second through hole; the first clamping block and the second clamping block are respectively provided with a first semicircular groove and a second semicircular groove; The pressing assembly is arranged at one end of the guide rod, and is used to press the first clamping block against one side of the second clamping block, so that the first semicircular groove cooperates with the second semicircular groove to form a circular accommodation space with two ends open; The first movable block and the second movable block are both semi-cylindrical; the first movable block cooperates with the second movable block to form a columnar clamp used in conjunction with the circular accommodation space; the columnar clamp is used to clamp and wind the fabric to be tested and then be inserted into the circular accommodation space; the first clamping block, the second clamping block, the first movable block and the second movable block cooperate to wind and clamp the fabric to be tested, so that the fabric to be tested is wound on the outer side wall of the columnar clamp; The method comprises the following steps: S1, clamping one end of the fabric to be tested in the columnar clamping piece on the fixture for fabric tensile property testing by cooperating with the first movable block and the second movable block, and making the fabric to be tested be wound on the outer side wall of the columnar clamping piece; S2, inserting the columnar clamping member wound with the fabric to be tested into the circular accommodating space, and squeezing the first clamping block onto one side of the second clamping block through the pressing assembly, thereby cooperating with the first movable block and the second movable block to wind and clamp one end of the fabric to be tested; S3, repeating steps S1 and S2, winding and clamping the other end of the fabric to be tested by another clamp for fabric tensile performance testing, and then performing a tensile performance test on the fabric to be tested, wherein the stretching direction of the fabric to be tested is parallel to the axial direction of the circular accommodating space formed by the first semicircular groove and the second semicircular groove.

2. The testing method of the equipment for testing the tensile properties of fabrics according to claim 1, characterized in that: The clamping assembly includes a mounting plate and a lead screw; the mounting plate is detachably arranged at one end of the guide rod; a threaded through hole for use with the lead screw is provided on the mounting plate; the lead screw is passed through the threaded through hole; an abutment block is provided at one end of the lead screw for abutting against the first clamping block; a handwheel is provided at the other end of the lead screw.

3. The testing method of the equipment for testing the tensile properties of fabrics according to claim 2, characterized in that: A connecting rod is provided on one end of the guide rod away from the base; a threaded portion is provided at one end of the connecting rod; a mounting hole used in conjunction with the connecting rod is provided on the mounting plate; the mounting plate is arranged on the connecting rod through the mounting hole; a nut is provided on the threaded portion for cooperating with the guide rod to fix the mounting plate on the connecting rod.

4. The testing method of the equipment for testing the tensile properties of fabrics according to claim 1, characterized in that: The length of the columnar clamping member is greater than the length of the circular accommodating space, so that the columnar clamping member can protrude from both ends of the circular accommodating space respectively.

5. The testing method of the equipment for testing the tensile properties of fabrics according to claim 1, characterized in that: The first movable block and the second movable block are respectively provided with first anti-slip grooves on their outer side walls; the first semicircular groove and the second semicircular groove are respectively provided with second anti-slip grooves on their inner side walls.

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