Tightening device for testing tensile property of wire and testing machine
By designing a tightening device including spindles, discs and tightening teeth, the wire tightening material is automatically tightened, and the problems of waste of manpower and unsolid wire clamping in the prior art are solved, and the accuracy and efficiency of the tensile performance test of the wire material are improved.
Patent Information
- Application Number
- CN202422374606.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The prior art requires manual tightening of the wire material when testing the tensile properties of wire material, which wastes human resources and may lead to unsolid wire clamping and affects the test accuracy.
A tightening device is designed, including spindles, discs, tightening guide rails and tightening teeth. The tightening teeth are pierced into the wire through the rotation of the disc, and the spring sheet and rollers are combined to automatically tighten the wire to reduce manpower operation.
The automated tightening of silk materials has been achieved, reducing human resource waste, improving experimental accuracy and efficiency, and reducing human errors.
Smart Images
Figure CN223217221U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wire tensile performance testing, in particular to a tightening device and a testing machine for testing the tensile performance of wires. Background Art
[0002] The tensile properties of wire materials, such as flat wire, are typically tested using a universal testing machine in conjunction with a fixture. During testing, the wire material must be tightened and secured to the fixture. However, this process typically requires the tester to manually tighten the wire, wasting manpower. Utility Model Content
[0003] In view of this, the utility model provides a tightening device and a testing machine for testing the tensile properties of wire materials, so as to solve the problem of wasting human resources when tightening wire materials.
[0004] In a first aspect, the present invention provides a tightening device for testing the tensile properties of a wire material, comprising:
[0005] a spindle, wound with the wire to be tested;
[0006] a disk having a first state in which it is driven to rotate about its central axis and a second state in which it is not driven;
[0007] a tightening guide rail, the tightening guide rail being located outside the disc and having a first gap therebetween, the first gap forming a tightening space, the tightening space having an inlet and an outlet, and the disc rotating in a first state in a direction extending from the inlet of the tightening space to the outlet of the tightening space;
[0008] The tightening teeth are arranged on the outside of the disc and between the disc and the tightening guide rail. When the wire to be tested extends into the tightening space, the disc rotates to make the tightening teeth penetrate into the wire to be tested.
[0009] The end of the wire to be tested wound on the spindle is extended into the tightening space. The rotation of the disc causes the tightening teeth to penetrate into the wire to be tested, thereby fixing the wire to be tested on the disc. The wire to be tested between the spindle and the disc can be tightened by rotating the disc.
[0010] In an optional embodiment, the first gap gradually becomes smaller from the tightening space entrance position to the tightening space first position;
[0011] The tightening space first position is located between the tightening space inlet and the tightening space outlet.
[0012] The penetration degree of the tightening teeth into the wire to be tested can be gradually increased to ensure that the wire to be tested is fixed on the disc.
[0013] In an optional embodiment, the method further includes:
[0014] A spring sheet is arranged on the outer side of the disc and located between the disc and the tightening guide rail, and the tightening teeth are arranged on the spring sheet.
[0015] In an optional embodiment, the spring sheet is tiltedly arranged on the disc, and in the rotation direction of the disc, the angle between the tangent line at the connection between the disc and the spring sheet and the spring sheet is an acute angle.
[0016] In an optional embodiment, when the spring sheet is located in the tightening space, the tightening teeth are located between the spring sheet and the tightening guide rail.
[0017] In an optional embodiment, when the spring sheet is located in the second position of the tightening space, the tightening teeth abut against the wire to be tested;
[0018] The tightening space second position is located between the tightening space entrance position and the tightening space first position.
[0019] The tightening teeth can be ensured to penetrate into the wire to be tested between the second position of the tightening space and the first position of the tightening space.
[0020] In an optional embodiment, the method further includes:
[0021] There are two protective plates, which are arranged on the tightening guide rail along the extension direction of the central axis of the disc, and the tightening space is located between the two protective plates.
[0022] The protective plate can prevent the wire to be tested from moving in the tightening space along the extension direction of the central axis of the disc and then rushing out of the tightening space.
[0023] In an optional embodiment, the method further includes:
[0024] There are two rollers, with a second gap between the two rollers and the second gap is located directly above the entrance of the tightening space, and the end of the wire to be tested on the spindle is clamped in the gap between the two rollers;
[0025] A turning roller, on which the wire to be tested on the spindle is wound and extends to the gap between the two rollers;
[0026] The roller has a third state in which it is driven to rotate around its central axis and a fourth state in which it is not driven. When the roller is in the third state, the two rollers transport the wire to be tested to the tightening space.
[0027] In a second aspect, the present invention further provides a testing machine for testing the tensile properties of a wire material, comprising:
[0028] A tightening device as described above;
[0029] a bracket, wherein an upper clamp and a lower clamp are provided on the bracket, and the upper clamp and the lower clamp are located between the second gap and the tightening space entrance;
[0030] The upper clamp and the lower clamp are suitable for fixing the wire to be tested on the bracket, wherein when the upper clamp and the lower clamp are in the open state, the wire to be tested passes through the upper clamp and the lower clamp respectively into the tightening space under the drive of the two rollers. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0032] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;
[0033] Figure 2 This is a schematic diagram of the rotation direction of the disc in the embodiment of the utility model;
[0034] Figure 3 This is a schematic diagram of the position of the protective plate in an embodiment of the present utility model.
[0035] Description of reference numerals:
[0036] 1. Spindle; 2. Disc; 3. Tightening guide rail; 4. Tightening teeth; 5. Spring leaf; 6. Protective plate; 7. Roller; 8. Steering roller; 9. Bracket; 10. Upper clamp; 11. Lower clamp. DETAILED DESCRIPTION
[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.
[0038] The following combination Figures 1 to 3, describing an embodiment of the present invention. In this utility model, the tested wire material can be SrPP flat yarn. SrPP is a self-reinforced polypropylene composite material composed of highly oriented PP fibers reinforced with PP resin. Its density is only 0.92 g / cm³, achieving significant lightweighting. It also exhibits excellent impact resistance, especially at low temperatures (-40°C). Furthermore, SrPP does not contain glass or carbon fibers, making it a 100% recyclable, green, and environmentally friendly material.
[0039] The flat yarn is obtained by ABA sandwich structure: the core layer is homopolymer polypropylene to provide strength; the skin layer is copolymer polypropylene, and the core layer is arranged between the two skin layers.
[0040] In a first aspect, the present invention provides a tightening device for testing the tensile properties of a wire material, comprising:
[0041] Spindle 1, wound with the wire to be tested;
[0042] The disk 2 has a first state in which it is driven to rotate about its central axis and a second state in which it is not driven, wherein the disk 2 can be driven directly by the motor or by the motor and the reducer;
[0043] a tightening guide rail 3, the tightening guide rail 3 being located outside the disc 2 and having a first gap therebetween, the first gap forming a tightening space, the tightening space having an inlet and an outlet, and when the disc 2 is in a first state, the rotation direction of the disc 2 is an extension direction from the inlet of the tightening space to the outlet of the tightening space;
[0044] The tightening teeth 4 are disposed outside the disc 2 and between the disc 2 and the tightening guide 3, with the tips of the teeth facing the tightening guide 3. When the wire to be tested extends into the tightening space, the disc 2 rotates to allow the tightening teeth 4 to penetrate the wire to be tested. To ensure that the rotating disc 2 allows the tightening teeth 4 to penetrate the wire to be tested, the gap between the tips of the tightening teeth 4 and the tightening guide 3 can be designed to be smaller than the thickness of the wire to be tested.
[0045] The end of the wire to be tested, wound around the spindle 1, is inserted into the tightening space. The rotation of the disc 2 causes the tightening teeth 4 to penetrate the wire to be tested, thereby securing the wire to be tested on the disc 2. The wire to be tested between the spindle 1 and the disc 2 can then be tightened by rotating the disc 2. During the tightening process, only a minimum of human effort is required to insert the end of the wire to be tested into the tightening space. Once the tightening teeth 4 penetrate the wire to be tested, no more human effort is required. This reduces waste of human resources compared to existing technologies.
[0046] In an optional embodiment, the first gap gradually becomes smaller from the entrance position of the tightening space to the first position of the tightening space, and the size of the tightening space entrance is relatively large, which facilitates the wire to be tested to enter the tightening space along the entrance; that is, from the entrance position of the tightening space to the first position of the tightening space, the first gap is gradual, and the first gap at the entrance position of the tightening space is larger than the first gap at the first position of the tightening space.
[0047] The first tightening space position is located between the tightening space inlet and the tightening space outlet. Optionally, the first tightening space position may also be the tightening space outlet position.
[0048] The penetration degree of the tightening teeth 4 into the wire to be tested can be gradually increased to ensure that the wire to be tested is fixed on the disc 2 .
[0049] In an optional embodiment, the method further includes:
[0050] The spring sheet 5 is arranged on the outer side of the disc 2 and located between the disc 2 and the tightening guide rail 3 , and the tightening teeth 4 are arranged on the spring sheet 5 .
[0051] In an optional embodiment, the spring sheet 5 is tiltedly arranged on the disk 2 , and in the rotation direction of the disk 2 , the angle between the tangent line at the connection between the disk 2 and the spring sheet 5 and the spring sheet 5 is an acute angle.
[0052] In an optional embodiment, when the spring sheet 5 is located in the tightening space, the tightening teeth 4 are located between the spring sheet 5 and the tightening guide rail 3 .
[0053] In an optional embodiment, when the spring piece 5 is in the second position of the tightening space, the tightening teeth 4 abut against the wire to be tested, and the spring piece 5 can prevent a rigid collision between the tightening teeth 4 and the tightening guide rail 3. From the second position of the tightening space to the first position of the tightening space, the spring piece 5 is gradually compressed toward the direction of the disc 2, and the degree to which the tightening teeth 4 penetrate the wire to be tested continues to increase. In addition, the spring piece 5 has good fatigue resistance and toughness, so the spring piece 5 can change accordingly after the first gap narrows. When a test is completed, the wire to be tested is removed, and the spring piece 5 can also be restored to its original shape.
[0054] The tightening space second position is located between the tightening space entrance position and the tightening space first position.
[0055] The tightening teeth 4 can be ensured to penetrate into the wire to be tested between the second tightening space position and the first tightening space position.
[0056] In an optional embodiment, the method further includes:
[0057] There are two protective plates 6 , which are arranged on the tightening guide rail 3 along the extension direction of the central axis of the disc 2 , and the tightening space is located between the two protective plates 6 .
[0058] The protective plate 6 can prevent the wire to be tested from moving in the extension direction of the central axis of the disc 2 in the tightening space and then rushing out of the tightening space, thereby playing a guiding role.
[0059] In an optional embodiment, the method further includes:
[0060] There are two rollers 7, with a second gap between them, and the second gap is located directly above the entrance to the tightening space. The end of the wire to be tested on the spindle 1 is clamped in the gap between the two rollers 7. The rollers 7 can be driven directly by a motor, or the motor and reducer can drive the disc 2. Friction exists between the rollers 7 and the wire to be tested, and this friction can be increased by providing texture or frosting the surface of the rollers 7.
[0061] Steering roller 8, the wire to be tested on the spindle 1 is wound around the steering roller 8 and extends to the gap between the two rollers 7; the wire is wound on the spindle 1 in an eight-shaped manner, so directly clamping the wire to be tested on the spindle 1 in the gap between the two rollers 7 will have an axial displacement difference, and the steering roller 8 can adjust the direction of the wire.
[0062] The rollers 7 have a third state in which they are driven to rotate around their central axes and a fourth state in which they are not driven. When the rollers 7 are in the third state, the two rollers 7 transport the wire to be tested to the tightening space.
[0063] A controller may also be included to control the driving of the disc 2 and the roller 7 .
[0064] In a second aspect, the present invention further provides a testing machine for testing the tensile properties of a wire material, comprising:
[0065] A tightening device as described above;
[0066] a bracket 9, wherein an upper clamp 10 and a lower clamp 11 are provided on the bracket 9, and the upper clamp 10 and the lower clamp 11 are located between the second gap and the tightening space entrance;
[0067] The upper clamp 10 and the lower clamp 11 are suitable for fixing the wire to be tested on the bracket 9, wherein, when the upper clamp 10 and the lower clamp 11 are in the open state, the wire to be tested is driven by the two rollers 7 to pass through the upper clamp 10 and the lower clamp 11 respectively into the tightening space. The upper clamp 10 and the lower clamp 11 can each include an adjusting screw and two clamps, and the adjusting screw is rotatably set on one clamp and passes through the other clamp, and is screwed to the other clamp, thereby adjusting the distance between the two clamps. When the wire to be tested passes through the upper clamp 10 and the lower clamp 11 respectively, the wire to be tested is located between the two clamps.
[0068] In addition, the testing machine can also include testing components such as tensile testing machines.
[0069] In a third aspect, this embodiment further provides a method for testing the tensile properties of a wire material, which is used in the above-mentioned testing machine and includes the following steps:
[0070] Open the upper clamp 10 and the lower clamp 11, drive the roller 7 to be in the third state, and the wire to be tested passes through the upper clamp 10 and the lower clamp 11 into the tightening space respectively;
[0071] The disc 2 is driven to be in the first state. After the wire to be tested is wound around the disc 2 for several turns, the disc 2 is put into the second state and the roller 7 is put into the fourth state. Generally speaking, one turn of the wire to be tested around the disc 2 is sufficient to meet the requirements.
[0072] Close the upper clamp 10 and the lower clamp 11, cut the wire to be tested between the upper clamp 10 and the roller 7, and perform a tensile performance test on the wire;
[0073] After the test is completed, the upper clamp 10 and the lower clamp 11 are opened, the disc 2 is driven in the reverse direction, and the wire material to be tested wound on the disc 2 is pulled out.
[0074] Among them, in the prior art, the wire is first passed through the upper clamp by hand, and then the handle is rotated to clamp the wire. After clamping, the wire is wound around the upper fixing pin provided below the upper clamp. The wire is then pulled down further and wound around the lower fixing pin provided on the lower clamp. Finally, the wound wire is inserted into the lower clamp, and after being tightened, the handle is rotated to clamp the wire. The distance between the crossbeam and the upper clamp is adjusted until the wire is taut, and then the test is started, wherein the crossbeam is connected to the lower clamp. Problems with the prior art: manual operation by a single person during the wire clamping process may result in loose wire clamping, causing the specimen to slip, affecting the measurement accuracy of the tensile test; if the wire clamping is loose, the machine needs to be manually adjusted, the accuracy is difficult to control, and it wastes time.
[0075] In addition, a fixed gauge length must be set before the wire tensile test. In the prior art, after the upper and lower clamps clamp the wire, the distance between the upper and lower clamps changes during manual tightening of the wire to be tested, making it impossible to tighten the wire to be tested without changing the gauge length. However, the present invention allows the flat wire to be tightened without changing the gauge length, reducing human error.
[0076] The present application ultimately tightens the wire by using the disc 2 in the second state and the roller 7 in the fourth state, basically realizing a semi-automatic mode, reducing errors and time loss caused by human operation, and tightening, fixing, and straightening the wire, reducing the possibility of sample slippage, and facilitating measurement tests.
[0077] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.
Claims
1. A tightening device for testing the tensile properties of a wire, characterized in that: include: A spindle (1) wound with a wire to be tested; The disc (2) has a first state in which it is driven to rotate about its central axis and a second state in which it is not driven; a tightening guide rail (3), the tightening guide rail (3) being located outside the disc (2) and having a first gap between the tightening guide rail and the disc (2), the first gap forming a tightening space, the tightening space having an inlet and an outlet, and when the disc (2) is in a first state, the rotation direction of the disc (2) is an extension direction from the tightening space inlet to the tightening space outlet; The tightening teeth (4) are arranged on the outside of the disc (2) and between the disc (2) and the tightening guide rail (3). When the wire to be tested extends into the tightening space, the disc (2) rotates so that the tightening teeth (4) penetrate into the wire to be tested.
2. The tightening device for testing the tensile properties of a wire material according to claim 1, characterized in that: From the entrance position of the tightening space to the first position of the tightening space, the first gap gradually becomes smaller; The tightening space first position is located between the tightening space inlet and the tightening space outlet.
3. The tightening device for testing the tensile properties of a wire material according to claim 2, characterized in that: Also includes: A spring sheet (5) is arranged outside the disc (2) and between the disc (2) and the tightening guide rail (3); and the tightening teeth (4) are arranged on the spring sheet (5).
4. The tightening device for testing the tensile properties of a wire material according to claim 3, characterized in that: The spring sheet (5) is tiltedly arranged on the disc (2), and in the rotation direction of the disc (2), the angle between the tangent line at the connection between the disc (2) and the spring sheet (5) and the spring sheet (5) is an acute angle.
5. The tightening device for testing the tensile properties of a wire material according to claim 3, characterized in that: When the spring sheet (5) is located in the tightening space, the tightening teeth (4) are located between the spring sheet (5) and the tightening guide rail (3).
6. The tightening device for testing the tensile properties of a wire material according to claim 3, characterized in that: When the spring sheet (5) is located at the second position of the tightening space, the tightening teeth (4) abut against the wire to be tested; The tightening space second position is located between the tightening space entrance position and the tightening space first position.
7. The tightening device for testing the tensile properties of a wire material according to claim 1, characterized in that: Also includes: There are two protective plates (6) arranged on the tightening guide rail (3) along the extension direction of the central axis of the disc (2), and the tightening space is located between the two protective plates (6).
8. The tightening device for testing the tensile properties of a wire material according to claim 1, characterized in that: Also includes: There are two rollers (7), a second gap is provided between the two rollers (7), and the second gap is located directly above the entrance of the tightening space, and the end of the wire material to be tested on the spindle (1) is clamped in the gap between the two rollers (7); A turning roller (8), wherein the wire material to be tested on the spindle (1) is wound around the turning roller (8) and extends to the gap between the two rollers (7); The rollers (7) have a third state in which they are driven to rotate around their central axes and a fourth state in which they are not driven. When the rollers (7) are in the third state, the two rollers (7) transport the wire material to be tested to the tightening space.
9. A testing machine for testing the tensile properties of wire, characterized in that: include: The tightening device according to any one of claims 1 to 8; A bracket (9), wherein an upper clamp (10) and a lower clamp (11) are provided on the bracket (9), and the upper clamp (10) and the lower clamp (11) are located between the second gap and the tightening space entrance; The upper clamp (10) and the lower clamp (11) are suitable for fixing the wire to be tested on the bracket (9), wherein when the upper clamp (10) and the lower clamp (11) are in an open state, the wire to be tested passes through the upper clamp (10) and the lower clamp (11) respectively into the tightening space under the drive of the two rollers (7).