Ribbon strength testing tool and system

Abstract

The utility model relates to a cable tie strength testing tool and system, and belongs to the technical field of cable tie strength testing. The cable tie strength testing tool comprises a first testing structure, a second testing structure, a first fixing structure and a second fixing structure, the first testing structure is provided with a first cambered surface, and the second testing structure is provided with a second cambered surface; the first fixing structure and the second fixing structure are oppositely arranged in the first direction, the first testing structure is connected with the first fixing structure, the second testing structure is connected with the second fixing structure, and the first fixing structure and the second fixing structure are both used for being connected with a tension testing machine; when the cable tie strength testing tool is in an initial state, one part of the cable tie in a locking state sleeves the first cambered surface, the other part of the cable tie sleeves the second cambered surface, and when the cable tie strength testing tool is in a testing state, the first testing structure and the second testing structure are gradually separated in the first direction. According to the invention, the strength of the ribbon in the locking state can be tested.

Description

Technical Field

[0001] The present application relates to the technical field of cable tie strength testing, and in particular to a cable tie strength testing tool and system. Background Art

[0002] Cable Tie, also known as cable tie or cable tie, is a kind of belt used to bundle things (such as wire harness). Before bundling things, the cable tie is in strip shape and has a locking structure on one end. When bundling things, the other end of the cable tie extends into and passes through the locking structure to lock the cable tie.

[0003] After the cable tie is produced, its strength needs to be tested using a tensile testing machine. For example, the two relative tensile fixtures of the tensile testing machine are fixed at the two ends of the strip cable tie. Then the tensile testing machine starts to stretch the cable tie at a certain stretching speed until it breaks. After that, the displacement of the two tensile fixtures when the cable tie breaks and the tensile force loaded by the tensile testing machine are read out. The maximum strength that the cable tie can withstand is calculated based on the displacement change and the tensile force.

[0004] However, current strength tests on cable ties all test the strength of the cable ties in a non-locked state, but cannot test the strength of the cable ties in a locked state. Utility Model Content

[0005] This application provides a cable tie strength testing tool and system, which can test the strength of cable ties in a locked state. The technical solution is as follows:

[0006] In a first aspect, according to the present application, a cable tie strength testing tool is provided, comprising a first test structure, a second test structure, a first fixing structure, and a second fixing structure, wherein the first test structure has a first curved surface, and the second test structure has a second curved surface;

[0007] The first fixing structure and the second fixing structure are arranged relative to each other in a first direction, the first test structure is connected to the first fixing structure, the second test structure is connected to the second fixing structure, and both the first fixing structure and the second fixing structure are used to be connected to a tensile testing machine;

[0008] When the cable tie strength testing tool is in an initial state, a portion of the cable tie in a locked state is sleeved on the first curved surface, and the other portion is sleeved on the second curved surface. When the cable tie strength testing tool is in a testing state, the first fixing structure and the second fixing structure are gradually separated in the first direction under the drive of the tensile testing machine, so that the first test structure and the second test structure are gradually separated in the first direction.

[0009] In a possible implementation manner, the first arc surface and the second arc surface are arranged relative to each other in the first direction.

[0010] In a possible implementation, the first arc surface and the second arc surface are both circular arc surfaces, and the central angle of the first arc surface and the central angle of the second arc surface are both greater than or equal to 180 degrees and less than or equal to 360 degrees.

[0011] In a possible implementation, the first arc surface and the second arc surface have equal diameters and equal central angles.

[0012] In a possible implementation, the first test structure includes n first test portions, each first test portion has a first arc surface, and the n first test portions are arranged in a stepped manner in the axial direction, where n is an integer greater than or equal to 2;

[0013] The second test structure includes n second test sections, each second test section has a second arc surface, and the n second test sections are arranged in a stepped manner in the axial direction;

[0014] When the cable tie strength testing tool is in an initial state, the cable tie in a locked state is sleeved on the first testing portion and the second testing portion of the same step.

[0015] In a possible implementation, the first test structure and the first fixed structure are connected in a detachable manner, and the second test structure and the second fixed structure are connected in a detachable manner.

[0016] In a possible implementation, the first test structure and the first fixed structure are connected via bolts, and the second test structure and the second fixed structure are connected via bolts.

[0017] In a possible implementation, the first test structure has a first positioning groove, the first fixing structure has a first positioning protrusion, and the first positioning protrusion is located in the first positioning groove;

[0018] The second testing structure has a second positioning groove, and the second fixing structure has a second positioning protrusion, and the second positioning protrusion is located in the second positioning groove.

[0019] In a possible implementation manner, the first fixing structure and the second fixing structure are mirror-symmetrical.

[0020] In a second aspect, a cable tie strength testing system is provided, the cable tie strength testing system comprising a tensile testing machine and the cable tie strength testing tooling described in the first aspect;

[0021] The tensile testing machine has a first fixed end and a second fixed end, the first fixed end is connected to the first fixed structure, and the second fixed end is connected to the second fixed structure.

[0022] In the solution presented in this application, the first test structure of a cable tie strength testing fixture has a first curved surface, and the second test structure has a second curved surface. A cable tie in a locked state can be placed over the first and second curved surfaces. The first test structure is fixedly connected to a tensile testing machine via a first fixing structure, and the second test structure is fixedly connected to the tensile testing machine via a second fixing structure. During testing, the first and second fixing structures, driven by the tensile testing machine, gradually separate in a first direction, simultaneously pulling the first and second test structures apart, thereby stretching the cable tie until it breaks. This cable tie strength testing fixture can test the strength of a cable tie in a locked state, more closely resembling the actual operating conditions of the cable tie. The resulting test strength better reflects the maximum strength the cable tie can withstand in use. Furthermore, this fixture not only tests whether the strength of the cable tie itself meets requirements, but also whether the strength of the cable tie's locking structure meets requirements.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, serve to explain the principles of the present application. In the drawings:

[0025] Figure 1 1 is a schematic structural diagram of a cable tie strength testing tool according to an embodiment;

[0026] Figure 2 is a schematic structural diagram of a cable tie in a locked state according to an embodiment;

[0027] Figure 3 is a schematic diagram showing a cable tie strength testing tool in an initial state according to an embodiment;

[0028] Figure 4 is a schematic diagram showing a cable tie strength testing tool in a testing state according to an embodiment;

[0029] Figure 5 is a schematic diagram showing a cable tie sleeve on a first curved surface and a second curved surface according to an embodiment;

[0030] Figure 6 is a schematic diagram showing a cable tie sleeve on a first curved surface and a second curved surface according to an embodiment;

[0031] Figure 7 is a schematic diagram showing a cable tie sleeve on a first curved surface and a second curved surface according to an embodiment;

[0032] Figure 8 is a schematic structural diagram of a first test structure and a second test structure according to an embodiment;

[0033] Figure 9 1 is an exploded schematic diagram of a cable tie strength testing tool according to an embodiment.

[0034] Description of Reference Numerals

[0035] 1. First test structure; 11. First test portion; 111. First arc surface; 112. First cut surface; 113. First positioning groove.

[0036] 2. Second test structure; 21. Second test portion; 211. Second arc surface; 212. Second cut surface; 213. Second positioning groove.

[0037] 3. First fixing structure; 31. First L-shaped plate; 32. First fixing column; 311. First positioning protrusion.

[0038] 4. Second fixing structure; 41. Second L-shaped plate; 42. Second fixing column; 411. Second positioning protrusion.

[0039] 10. Cable tie; 101. Cable tie body; 102. Locking structure.

[0040] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0042] This embodiment relates to a cable tie strength testing tool (referred to as the tool for short), which can be used to test the strength of a cable tie in a locked state.

[0043] like Figure 1 The following is a schematic diagram of the tooling structure, refer to Figure 1As shown, the tooling includes a first test structure 1, a second test structure 2, a first fixed structure 3 and a second fixed structure 4, wherein the first fixed structure 3 and the second fixed structure 4 are arranged relative to each other in a first direction, and the first test structure 1 and the first fixed structure 3 are fixedly connected, and the second test structure 2 and the second fixed structure 4 are fixedly connected.

[0044] Among them, the first fixed structure 3 and the second fixed structure 4 are both used to connect to the tensile testing machine. For example, the tensile testing machine has two fixed ends (denoted as the first fixed end and the second fixed end), the first fixed structure 3 is fixedly connected to the first fixed end, and the second fixed structure 4 is fixedly connected to the second fixed end.

[0045] In this way, when the tensile testing machine stretches at a certain tensile speed (such as 1 mm / s), the first fixed structure 3 and the second fixed structure 4 are gradually separated in the first direction under the drive of the tensile testing machine. As the first fixed structure 3 and the second fixed structure 4 gradually separate, they also carry the connected first test structure 1 and the second test structure 2 gradually separate in the first direction.

[0046] The first direction is the separation direction of the first fixing structure 3 and the second fixing structure 4 , the separation direction of the first test structure 1 and the second test structure 2 , and the stretching direction of the tensile testing machine.

[0047] In one example, a cable tie 10 in a locked state can be placed over the first test structure 1 and the second test structure 2. Thus, as the first test structure 1 and the second test structure 2 gradually separate, the cable tie 10 is stretched. When the cable tie 10 is stretched just enough, the maximum strength that the cable tie 10 can withstand in the locked state can be determined based on the tensile speed of the tensile testing machine and the separation distance between the first test structure 1 and the second test structure 2.

[0048] like Figure 2 The diagram shows the structure of the cable tie 10 in a locked state. Figure 2 As shown, the cable tie 10 in the locked state is curved in an arc shape, so continue to refer to Figure 1 As shown, the first test structure 1 has a first arc surface 111 , and the second test structure 2 has a second arc surface 211 .

[0049] In this way, when the tooling is in the initial state, Figure 3 As shown, a portion of the cable tie 10 in the locked state is sleeved onto the first curved surface 111 of the first test structure 1, and another portion of the cable tie 10 is sleeved onto the second curved surface 211 of the second test structure 2. For example, a portion of the cable tie 10 is in contact with the first curved surface 111, and another portion is in contact with the second curved surface 211.

[0050] When the tooling is in the test state, as shown in 3 and refer to Figure 4 As shown, the tensile testing machine drives the first fixed structure 3 and the second fixed structure 4 to gradually separate, and drives the first test structure 1 and the second test structure 2 to gradually separate, thereby gradually stretching the cable tie 10 on the first arc surface 111 and the second arc surface 211 until it breaks.

[0051] It can be seen that the tool can be used to test the strength of the cable tie in the locked state. This strength test method is closer to the actual use conditions of the cable tie. Moreover, the tool is used to test the strength of the cable tie body portion 101 and the locking strength of the cable tie's locking structure 102.

[0052] For example, it is possible to test whether the strength of the cable tie body 101 meets the requirements, and it is also possible to test whether the locking strength of the cable tie body 101 meets the requirements when the locking structure 102 locks the cable tie body 101 .

[0053] As an example, when the cable tie 10 is broken (it may be the cable tie body 101 that is broken or it may be the locking structure 102 that is broken), a test strength is obtained. If the test strength is greater than or equal to the strength threshold of the cable tie body 101 and is also greater than or equal to the strength threshold after the locking structure 102 is locked, then the strength of the cable tie body 101 meets the requirement, and the locking strength after the locking structure 102 locks the cable tie body 101 meets the requirement.

[0054] If the test strength is less than the strength threshold of the cable tie body 101 , it means that the strength of the cable tie body 101 does not meet the requirements; if the test strength is less than the strength threshold of the locking structure 102 after locking, it means that the locking strength of the locking structure 102 after locking does not meet the requirements.

[0055] The following introduces various features of the tooling, firstly introducing the features of the first curved surface 111 and the second curved surface 211.

[0056] Regarding the shapes of the first curved surface 111 and the second curved surface 211. In one example, the first curved surface 111 can be an elliptical curved surface or a circular curved surface. Similarly, the second curved surface 211 can be an elliptical curved surface or a circular curved surface. This embodiment does not limit the specific curved surface shapes of the first curved surface 111 and the second curved surface 211. For ease of description, circular curved surfaces are used as examples.

[0057] It should be noted that since the cable tie 10 is mounted on the first curved surface 111 and the second curved surface 211, the first curved surface 111 and the second curved surface 211 both have a certain width. For example, the width of the first curved surface 111 is greater than or equal to the width of the cable tie, and the width of the second curved surface 211 is greater than or equal to the width of the cable tie. Therefore, the first curved surface 111 and the second curved surface 211 are circular arc surfaces, which can also be understood as cylindrical arc surfaces (also called cylindrical surfaces).

[0058] In one example, Figure 5 As shown, the first curved surface 111 can be a semicircular surface, and the second curved surface 211 can also be a semicircular surface. That is, the central angle O1 of the first curved surface 111 is 180 degrees, and the central angle O2 of the second curved surface 211 is 180 degrees. Then, in the initial state, the first curved surface 111 and the second curved surface 211 are spliced ​​into a complete circular surface. The cable tie 10 is placed on the first curved surface 111 and the second curved surface 211, and the cable tie 10 is in contact with all positions of the first curved surface 111 and the second curved surface 211.

[0059] In another example, Figure 6 As shown, the first curved surface 111 can be a semicircular surface, and the second curved surface 211 can also be a semicircular surface. That is, the central angle O1 of the first curved surface 111 and the central angle O2 of the second curved surface 211 are both greater than 180 degrees and less than or equal to 360 degrees. In the initial state, the cable tie 10 is placed on the first curved surface 111 and the second curved surface 211, and the cable tie 10 partially aligns with the first curved surface 111 and the second curved surface 211.

[0060] Of course, in another example, Figure 7 As shown, the first arc surface 111 and the second arc surface 211 can also be half arc surfaces, that is, the central angle O1 of the first arc surface 111 and the central angle O2 of the second arc surface 211 are both greater than 0 degree and less than 180 degrees.

[0061] refer to Figure 7 As shown, the central angle of the first curved surface 111 is less than 180 degrees. Therefore, after the cable tie 10 is placed on the first curved surface 111, the first tangent surface of the first test structure 1 that is opposite to and connected to the first curved surface 111 and the ridge between the first curved surface 111 contact the cable tie 10. In this case, the cable tie 10 will experience concentrated force at the ridge, causing the cable tie 10 to be cut at the ridge, thereby affecting the strength test of the cable tie 10.

[0062] Therefore, the central angle of the first arc surface 111 and the central angle of the second arc surface 211 are greater than or equal to 180 degrees and less than or equal to 360 degrees. Figure 5 and Figure 6 As shown, the surfaces that the cable tie 10 contacts are all curved surfaces, which makes it less likely for force concentration to occur, thereby improving the accuracy of strength measurement.

[0063] In one example, reference Figures 5 to 7 As shown, the first arc surface 111 and the second arc surface 211 can have equal diameters and equal central angles, so that the first arc surface 111 and the second arc surface 211 are mirror-symmetrical. Of course, in another example, the first arc surface 111 and the second arc surface 211 can also have equal diameters but different central angles, or they can have equal central angles but different diameters.

[0064] The above is an introduction to the features of the first arc surface 111 and the second arc surface 211 . The following describes the features of the first test structure 1 and the second test structure 2 .

[0065] As mentioned above, the central angle of the first arc surface 111 is greater than or equal to 180 degrees and less than or equal to 360 degrees. Then, the first test structure 1 can be a half cylinder (refer to Figure 1 Similarly, since the central angle of the second arc surface 211 is greater than or equal to 180 degrees and less than or equal to 360 degrees, the second test structure 2 can be a half cylinder (refer to Figure 1 As shown), it can be a large half cylinder or a complete cylinder.

[0066] In one example, the first test structure 1 and the second test structure 2 may be mirror-symmetrical. Of course, the first test structure 1 and the second test structure 2 may not be mirror-symmetrical.

[0067] It should be noted that this embodiment does not limit the specific shapes of the first test structure 1 and the second test structure 2, and they only need to have a first arc surface 111 and a second arc surface 211. This embodiment does not limit whether the first test structure 1 and the second test structure 2 are mirror-symmetrical. Figure 1 The first test structure 1 and the second test structure 2 are shown as examples.

[0068] refer to Figure 1 As shown, the first test structure 1 is a half cylinder cut along the axial direction. Therefore, the first test structure 1 also has a first cut surface 112 that is opposite to and connected to the first curved surface 111. Similarly, the second test structure 2 is a half cylinder cut along the axial direction. Therefore, the second test structure 2 also has a second cut surface 212 that is opposite to and connected to the second curved surface 211.

[0069] like Figure 1 And refer to Figure 2As shown, when the fixture is in the initial state, the first cut surface 112 of the first test structure 1 and the second cut surface 212 of the second test structure 2 are aligned, and the first curved surface 111 of the first test structure 1 and the second curved surface 211 of the second test structure 2 form a complete arc surface, and the cable tie 10 is mounted on the arc surface. When the fixture is in the testing state, the first cut surface 112 of the first test structure 1 and the second cut surface 212 of the second test structure 2 no longer align with each other.

[0070] In one example, the first test structure 1 may be in a stepped shape, referring to Figure 8 As shown, the first test structure 1 includes n first test sections 11, each of which has a first arc surface 111. Moreover, the diameters of the first arc surfaces 111 of different first test sections 11 are different. For example, the diameters of the first arc surfaces 111 gradually increase from the first section to the nth section of the first test section 11, so that the n first test sections 11 are arranged in a stepped manner in the axial direction, wherein n is an integer greater than or equal to 2. Figure 8 In the example, n is 2. Of course, n can also be an integer greater than 2.

[0071] The second test structure 2 is also in a stepped shape. Figure 8 As shown, the second test structure 2 includes n segments of second test parts 21, and each of the second test parts 21 has a second arc surface 211. Moreover, the diameters of the second arc surfaces 211 of different segments of the second test parts 21 are different. For example, from the first segment to the n-th segment of the second test part 21, the diameter of the second arc surface 211 gradually increases, so that the n segments of the second test parts 21 are arranged in a stepped manner in the axial direction.

[0072] The first test portion 11 and the second test portion 21, and the first curved surface 111 and the second curved surface 211, which are located in the same section, are relatively distributed in the direction of separation of the first test structure 1 and the second test structure 2. Thus, the cable tie 10 is placed on the first curved surface 111 and the second curved surface 211, which are located in the same section.

[0073] The first test structure 1 and the second test structure 2 are stepped. Therefore, when testing a cable tie 10 with a relatively small size, the cable tie with a relatively small size can be placed on the first arc surface 111 and the second arc surface 211 with a relatively small diameter. For example, referring to Figure 8 As shown, a small-sized cable tie is sleeved on the first arc surface 111 and the second arc surface 211 with a small diameter, and a large-sized cable tie is sleeved on the first arc surface 111 and the second arc surface 211 with a large diameter.

[0074] It can be seen that the stepped first test structure 1 and the second test structure 2 can realize the strength measurement of cable ties of various sizes.

[0075] The above is an introduction to the features of the first test structure 1 and the second test structure 2. The following is an introduction to the first fixed structure 3 and the second fixed structure 4. As mentioned above, the first test structure 1 and the second test structure 2 can be mirror-symmetrical. Figure 9 As shown, the first fixing structure 3 and the second fixing structure 4 may also be mirror-symmetrical.

[0076] In one example, the first fixing structure 3 and the second fixing structure 4 can be plate-shaped structures, so that the end surface of the first test structure 1 is fixed to the first fixing structure 3, and the end surface of the second test structure 2 is fixed to the second fixing structure 4. The plate-shaped first fixing structure 3 and the second fixing structure 4 are then respectively fixed to the tensile testing machine.

[0077] In another example, refer to Figure 9 As shown, the first fixed structure 3 includes a first L-shaped plate 31 and a first fixed column 32. One end of the first fixed column 32 is installed on the first plate body of the first L-shaped plate 31, and the other end is used to connect to the tensile testing machine. The first test structure 1 is installed on the second plate body of the first L-shaped plate 31.

[0078] The first fixing column 32 and the first plate body of the first L-shaped plate 31 can be fixedly connected by bolts, or fixedly connected by integral molding, or fixedly connected by welding.

[0079] Continue to refer Figure 9 As shown, the second fixed structure 4 includes a second L-shaped plate 41 and a second fixed column 42. One end of the second fixed column 42 is installed on the first plate body of the second L-shaped plate 41, and the other end is used to connect to the tensile testing machine. The second test structure 2 is installed on the second plate body of the second L-shaped plate 41.

[0080] The second fixing column 42 and the first plate body of the second L-shaped plate 41 may be fixedly connected by bolts, or may be fixedly connected by integral molding, or may be fixedly connected by welding.

[0081] Continue to refer Figure 9 As shown, in the first direction, the first plate body of the first L-shaped plate 31 and the first plate body of the second L-shaped plate 41 are opposite and arranged in parallel, and the second plate body of the first L-shaped plate 31 and the second plate body of the second L-shaped plate 41 are arranged coplanar.

[0082] Regarding the fixed connection between the first test structure 1 and the second plate of the first L-shaped plate 31. As mentioned above, the first test structure 1 can be in a stepped shape, then, refer to Figure 9As shown, the first test portion 11 of the first section can be fixedly connected to the second plate of the first L-shaped plate 31, or the first test portion 11 of the nth section can be fixedly connected to the second plate of the first L-shaped plate 31. The first test portion 11 of the first section is the first test portion 11 with the smallest diameter, and the first test portion 11 of the nth section is the first test portion 11 with the largest diameter.

[0083] Similarly, regarding the fixed connection between the second test structure 2 and the second plate body of the second L-shaped plate 41. As shown above, the second test structure 2 can be in a stepped shape, then, refer to Figure 9 As shown, the first section of the second testing portion 21 can be fixedly connected to the second plate body of the second L-shaped plate 41, or the nth section of the second testing portion 21 can be fixedly connected to the second plate body of the second L-shaped plate 41. The first section of the second testing portion 21 is the second testing portion 21 with the smallest diameter, and the nth section of the second testing portion 21 is the second testing portion 21 with the largest diameter.

[0084] In one example, the first test structure 1 and the second plate body of the first L-shaped plate 31 can be fixedly connected in a detachable manner, for example, the first test structure 1 and the second plate body of the first L-shaped plate 31 are fixedly connected by bolts.

[0085] Likewise, the second test structure 2 and the second plate body of the second L-shaped plate 41 may be fixedly connected in a detachable manner. For example, the second test structure 2 and the second plate body of the second L-shaped plate 41 may be fixedly connected by bolts.

[0086] The first test structure 1 and the first fixing structure 3 are detachably connected, and the second test structure 2 and the second fixing structure 4 are detachably connected, facilitating replacement of first test structures 1 and second test structures 2 of different sizes to facilitate testing cable ties of different sizes. Alternatively, first test structures 1 and second test structures 2 of different sizes can share the first fixing structure 3 and second fixing structure 4.

[0087] In one example, the first test structure 1 and the first fixed structure 3 can be pre-positioned by a positioning structure before being fixedly connected by bolts. Accordingly, Figure 9 As shown, the first testing structure 1 has a first positioning groove 113 , and the first fixing structure 3 has a first positioning protrusion 311 . The first positioning protrusion 311 is located in the first positioning groove 113 .

[0088] Likewise, reference Figure 9 As shown, the second testing structure 2 has a second positioning groove 213 , and the second fixing structure 4 has a second positioning protrusion 411 . The second positioning protrusion 411 is located in the second positioning groove 213 .

[0089] In one example, the first positioning groove 113 and the second positioning groove 213 can be L-shaped notches. When the tooling is in the initial state, after the first section 112 of the first test structure 1 and the second section 212 of the second test structure 2 are fitted together, the first positioning groove 113 and the second positioning groove 213 form a groove structure.

[0090] In one example, the first positioning protrusion 311 is located on the second plate surface of the first L-shaped plate 31 and close to the end, and the second positioning protrusion 411 is located on the second plate surface of the second L-shaped plate 41 and close to the end.

[0091] Thus, before the first test structure 1 and the first fixing structure 3 are fixed, the first positioning protrusion 311 extends into the first positioning groove 113 to achieve pre-positioning, and then the first test structure 1 and the first fixing structure 3 are fixedly connected by bolts. Before the second test structure 2 and the second fixing structure 4 are fixed, the second positioning protrusion 411 extends into the second positioning groove 213 to achieve pre-positioning, and then the second test structure 2 and the second fixing structure 4 are fixedly connected by bolts.

[0092] Based on the above, when using the tooling to test the cable tie, the first fixing structure 3 and the second fixing structure 4 can be first fixed to the first fixing end and the second fixing end of the tensile testing machine, respectively, and then the first test structure 1 can be fixed to the first fixing structure 3, and the second test structure 2 can be fixed to the second fixing structure 4. Alternatively, the first test structure 1 and the first fixing structure 3, and the second test structure 2 and the second fixing structure 4 can be fixed first, and then the first fixing structure 3 and the second fixing structure 4 can be fixed separately to the tensile testing machine.

[0093] It should be pointed out that there are scale lines on the tensile testing machine and the tooling has identification lines. When fixing the tooling to the tensile testing machine, it is necessary to align the identification lines of the tooling with the scale lines of the tensile testing machine so that the tensile displacement can be read during the test.

[0094] Then, the locked cable tie is placed over the first curved surface 111 of the first test structure 1 and the second curved surface 211 of the second test structure 2, with the cable tie fitting closely to the first curved surface 111 and the second curved surface 211. After the cable tie 10 is placed over the first test structure 1 and the second test structure 2, the excess cable tie body can be trimmed off or retained.

[0095] The tensile testing machine is then set to a stretching speed, for example, 1 mm / s, and the tensile testing machine is started until the cable tie breaks. When the tie breaks, the tensile testing machine stops stretching and records the change in displacement and tension. Based on these changes in displacement and tension, the tested strength of the cable tie can be determined.

[0096] In an embodiment of the present application, a cable tie strength testing fixture comprises a first test structure having a first curved surface, and a second test structure having a second curved surface. A cable tie in a locked state can be placed over the first and second curved surfaces. The first test structure is fixedly connected to a tensile testing machine via a first fixing structure, and the second test structure is fixedly connected to the tensile testing machine via a second fixing structure. During testing, the first and second fixing structures are driven by the tensile testing machine to gradually separate in a first direction, simultaneously moving the first and second test structures apart, thereby stretching the cable tie until it breaks. This cable tie strength testing fixture can test the strength of a cable tie in a locked state, more closely resembling the actual operating conditions of the cable tie. The resulting test strength better reflects the maximum strength the cable tie can withstand in use. Furthermore, this fixture not only tests whether the strength of the cable tie itself meets the required standards, but also whether the strength of the cable tie's locking structure meets the required standards.

[0097] This embodiment also provides a cable tie strength testing system, which includes a tensile testing machine and the above-mentioned cable tie strength testing tooling, the tensile testing machine having a first fixed end and a second fixed end, the first fixed end being connected to the first fixed structure 3 of the tooling, and the second fixed end being connected to the second fixed structure 4 of the tooling.

[0098] The first fixed end and the second fixed end are relatively distributed in the tensile direction of the tensile testing machine. The first fixed end can be a fixed end on one fixture of the tensile testing machine, and the second fixed end can be a fixed end on another fixture of the tensile testing machine.

[0099] The cable tie strength testing system includes a fixture, as described above, comprising a first testing structure having a first curved surface and a second testing structure having a second curved surface. A cable tie in a locked state can be fitted over both the first and second curved surfaces. The first testing structure is fixedly connected to a tensile testing machine via a first fixing structure, and the second testing structure is fixedly connected to the tensile testing machine via a second fixing structure. During testing, the first and second fixing structures are driven by the tensile testing machine to gradually separate in a first direction, simultaneously moving the first and second testing structures apart, thereby stretching the cable tie until it breaks. This cable tie strength testing fixture can test the strength of a cable tie in a locked state, more closely resembling actual usage conditions. The resulting test strength better reflects the maximum strength the cable tie can withstand in use. Furthermore, this fixture not only tests the strength of the cable tie itself but also the strength of its locking structure.

[0100] The terms used in the embodiments of this application are intended only to explain the embodiments of this application and are not intended to limit this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meanings understood by a person of ordinary skill in the art to which this application belongs. The terms "first," "second," "third," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are simply used to distinguish different components. The terms "include" or "comprises" and similar expressions mean that the elements or objects listed before "include" or "comprises" include the elements or objects listed after "include" or "comprises," and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and similar expressions are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper," "lower," "left," "right," etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0101] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A cable tie strength testing tool, characterized in that: The invention comprises a first test structure (1), a second test structure (2), a first fixed structure (3) and a second fixed structure (4), wherein the first test structure (1) has a first curved surface (111), and the second test structure (2) has a second curved surface (211); The first fixing structure (3) and the second fixing structure (4) are arranged relative to each other in a first direction, the first test structure (1) is connected to the first fixing structure (3), the second test structure (2) is connected to the second fixing structure (4), and both the first fixing structure (3) and the second fixing structure (4) are used to be connected to a tensile testing machine; When the cable tie strength testing tool is in an initial state, a portion of the cable tie (10) in a locked state is sleeved on the first arc surface (111), and the other portion is sleeved on the second arc surface (211). When the cable tie strength testing tool is in a testing state, the first fixing structure (3) and the second fixing structure (4) are gradually separated in the first direction under the drive of the tensile testing machine, so that the first test structure (1) and the second test structure (2) are gradually separated in the first direction.

2. The cable tie strength testing tool according to claim 1, characterized in that: The first arc surface (111) and the second arc surface (211) are arranged relative to each other in the first direction.

3. The cable tie strength testing tool according to claim 1, characterized in that: The first arc surface (111) and the second arc surface (211) are both arc surfaces, and the central angle of the first arc surface (111) and the central angle of the second arc surface (211) are both greater than or equal to 180 degrees and less than or equal to 360 degrees.

4. The cable tie strength testing tool according to claim 3, characterized in that: The first arc surface (111) and the second arc surface (211) have the same diameter and the same central angle.

5. The cable tie strength testing tool according to claim 1, characterized in that: The first test structure comprises n first test sections (11), each first test section (11) having a first arc surface (111), and the n first test sections (11) are arranged in a stepped manner in the axial direction, wherein n is an integer greater than or equal to 2; The second test structure (2) comprises n second test sections (21), each second test section (21) having a second arc surface (211), and the n second test sections (21) are arranged in a stepped manner in the axial direction; When the cable tie strength testing tool is in an initial state, the cable tie (10) in a locked state is sleeved on the first test portion (11) and the second test portion (21) on the same step.

6. The cable tie strength testing tool according to any one of claims 1 to 5, characterized in that: The first test structure (1) and the first fixed structure (3) are connected in a detachable manner, and the second test structure (2) and the second fixed structure (4) are connected in a detachable manner.

7. The cable tie strength testing tool according to claim 6, characterized in that: The first test structure (1) and the first fixed structure (3) are connected by bolts, and the second test structure (2) and the second fixed structure (4) are connected by bolts.

8. The cable tie strength testing tool according to claim 7, characterized in that: The first test structure (1) has a first positioning groove (113), the first fixing structure (3) has a first positioning protrusion (311), and the first positioning protrusion (311) is located in the first positioning groove (113); The second test structure (2) has a second positioning groove (213), the second fixing structure (4) has a second positioning protrusion (411), and the second positioning protrusion (411) is located in the second positioning groove (213).

9. The cable tie strength testing tool according to any one of claims 1 to 5, characterized in that: The first fixing structure (3) and the second fixing structure (4) are mirror-symmetrical.

10. A cable tie strength testing system, characterized in that: The cable tie strength testing system comprises a tensile testing machine and the cable tie strength testing tool according to any one of claims 1 to 9; The tensile testing machine has a first fixed end and a second fixed end, the first fixed end is connected to the first fixed structure (3), and the second fixed end is connected to the second fixed structure (4).

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