A tool for needle flame test
By designing a flexible mesh clamping plate and an adjustable angle connecting part, the problem of unstable specimen clamping in existing needle flame testing equipment is solved, achieving stable clamping of the specimen and ensuring positional accuracy, thereby improving the accuracy of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO PROD QUALITY INSPECTION INST (QINGDAO PROD QUALITY & SAFETY RISK MONITORING CENT)
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-19
AI Technical Summary
Existing needle flame testing equipment has difficulty in firmly clamping slender or soft specimens, making it difficult to guarantee positional accuracy and affecting test results.
The specimen is held by first and second flexible mesh clamping plates through a flexible metal wire mesh. Grooves and connecting holes are provided on the clamping plates to ensure that the metal wire does not slip. Combined with the adjustable angle connecting part, flexible clamping and position adjustment can be achieved.
It achieves stable clamping of slender or flexible specimens, maintains good positional accuracy, allows flexible adjustment of specimen angle, and ensures the accuracy of test results.
Smart Images
Figure CN224383229U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of needle flame testing equipment, specifically a tooling for needle flame testing. Background Technology
[0002] The needle flame test is a method used to evaluate the flame retardant properties of materials. This test is commonly applied to plastic components in electronic and electrical products to ensure they do not easily ignite or spread a flame upon contact with a flame, thus ensuring product safety. When conducting needle flame tests on heat-generating elements and internal wiring components as specified in GB 4706.8 and IEC 60335-2-17, it is often difficult to clamp specimens that are slender or made of soft materials. Existing clamps also struggle to guarantee good positional accuracy after clamping, leading to specimen swaying during testing and affecting the measurement results. Utility Model Content
[0003] This utility model discloses a fixture for needle flame testing, which solves the technical problems of time-consuming and laborious adjustment of the relative position of the specimen and the burning needle, and difficulty in ensuring positional accuracy in the prior art. It has the technical advantages of reasonable structure, convenient and reliable specimen clamping, good flexibility, and helps to ensure the positional accuracy of the specimen. The technical solution adopted is as follows:
[0004] A fixture for needle flame testing includes a first clamping plate and a second clamping plate. The first clamping plate includes a first flexible mesh, and the second clamping plate includes a second flexible mesh. The first and second flexible meshes are made of fire-resistant and high-temperature resistant materials. When the first and second clamping plates are relatively fixed, the first and second flexible meshes can flexibly clamp the specimen to facilitate needle flame testing.
[0005] Based on the above technical solution, the first flexible mesh includes a plurality of first metal wires, the second flexible mesh includes a plurality of second metal wires, and the first flexible mesh and the second flexible mesh are respectively disposed on both sides of the specimen to flexibly clamp the specimen.
[0006] Based on the above technical solution, a plurality of the first metal wires are arranged in parallel, and a plurality of the second metal wires are arranged in parallel with the first metal wires, with the second metal wires avoiding the first metal wires, so as to clamp the specimen in different sections.
[0007] Based on the above technical solution, the first clamping plate includes a first U-shaped plate, with both ends of the first metal wire wound around and connected to the two arms of the first U-shaped plate; the second clamping plate includes a second U-shaped plate, with both ends of the second metal wire wound around and connected to the two arms of the second U-shaped plate. Preferably, the width of the first flexible mesh is larger than the space between the two arms of the first clamping plate, and the width of the second flexible mesh is larger than the space between the two arms of the second clamping plate, so that when the specimen is clamped between the first flexible mesh and the second flexible mesh, it can be finely adjusted by swinging up and down.
[0008] Based on the above technical solution, the first clamping plate and the second clamping plate are provided with a first groove and a second groove on their opposite side walls to accommodate the first metal wire and the second metal wire.
[0009] Based on the above technical solution, both the first clamping plate and the second clamping plate are provided with a plurality of connection holes for threaded connection; or the first clamping plate is hinged to the second clamping plate at the first end, and the first clamping plate is connected to the second clamping plate at the second end by a locking member.
[0010] Based on the above technical solution, the first clamping plate and the second clamping plate are made of stainless steel.
[0011] Based on the above technical solution, the first clamping plate has a connecting part at the end away from the combustion needle seat, and the connecting part is used to fix the tooling.
[0012] Based on the above technical solution, the connecting part is provided with a threaded connection mounting hole.
[0013] Based on the above technical solution, the angle between the connecting part and the plane where the first clamping plate is located is 30 to 60°.
[0014] Beneficial effects
[0015] This utility model has a reasonable structure. The first and second flexible meshes are respectively set on both sides of the specimen to flexibly clamp the specimen. On the one hand, the covering clamping is conducive to the stable clamping of the specimen, and can maintain good positional accuracy even if the specimen is burning. On the other hand, the first and second flexible meshes can clamp the specimen at multiple positions, and can clamp even slender or soft specimens well. In addition, the flexible clamping of the first and second flexible meshes gives the specimen a certain degree of freedom of movement. Thus, the angle of the specimen can be flexibly adjusted after clamping, making it convenient to use.
[0016] In this invention, both the first flexible mesh and the second flexible mesh include several parallel metal wires. The two ends of the metal wires are wrapped around the two arms of the clamping plate. The two arms of the clamping plate are provided with grooves, which can position the metal wires and prevent the metal wires from slipping during use, thereby ensuring the clamping is reliable.
[0017] In this utility model, one end of the first clamping plate is also provided with a connecting part, which is used to fix the tooling, and the connecting part has an angle with the plane where the first clamping plate is located, so that the specimen can be arranged at a set angle, which facilitates the needle flame test. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.
[0019] Figure 1 : A schematic diagram of the structure of this utility model from the side view;
[0020] Figure 2 : A top view of the structure of the first clamping plate in this utility model;
[0021] Figure 3 : A three-dimensional structural diagram of the present invention for holding a specimen for needle flame testing;
[0022] Figure 4 : A side view of the structure of this utility model for holding a specimen in a needle flame test; Detailed Implementation
[0023] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.
[0024] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0025] In this document, unless otherwise stated, the term "multiple" means two or more.
[0026] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.
[0027] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0028] like Figures 1-4The tooling for needle flame testing shown includes a first clamping plate 1 and a second clamping plate 2. The first clamping plate 1 includes a first U-shaped plate, which includes two arms and a first flexible mesh is fixed between the two arms. The second clamping plate 2 includes a second U-shaped plate, which includes two arms and a second flexible mesh is fixed between the two arms.
[0029] In this embodiment, the first flexible mesh includes a plurality of first metal wires 3, and the second flexible mesh includes a plurality of second metal wires 4, such as... Figure 2 and 3 As shown, several first metal wires 3 are arranged in parallel, with a distance of 2a between adjacent first metal wires 3. Several second metal wires 4 are arranged in parallel with the first metal wires 3, with a distance of 2a between adjacent second metal wires 4. The second metal wires 4 are arranged to avoid the first metal wires 3. The distance a between the second metal wire 4 and the adjacent first metal wire 3 is 10mm in this embodiment. In other embodiments of this utility model, a is 6-12mm. In this way, the first metal wires 3 and the second metal wires 4 can flexibly clamp the specimen at different sections and multiple locations, ensuring a secure clamping and facilitating needle flame testing.
[0030] Furthermore, the first clamping plate 1 and the second clamping plate 2 have opposite side walls provided with a first groove 12 and a second groove for accommodating the first metal wire 3 and the second metal wire 4, such as... Figure 2 As shown, the two ends of the first metal wire 3 are embedded in the first groove 11 and are wound around the two arms of the first U-shaped plate. The two ends of the second metal wire 4 are embedded in the second groove and are wound around the two arms of the second U-shaped plate. Thus, when the first clamping plate 1 and the second clamping plate 2 are relatively fixed, the first clamping plate 1 and the second clamping plate 2 can be fitted together.
[0031] In this embodiment, both the first metal wire 3 and the second metal wire 4 are made of copper wire with a diameter of 0.6 mm, which has good flexibility and sufficient structural strength. The area of the first flexible grid formed by several first metal wires 3 is larger than the space between the two arms of the first clamping plate 1, and the area of the second flexible grid formed by several second metal wires 4 is larger than the space between the two arms of the second clamping plate 2. In this way, when the specimen is clamped between the first flexible grid and the second flexible grid, it can be finely adjusted by swinging up and down, making it more flexible to use.
[0032] The first metal wire 3 and the second metal wire 4 are both made of fire-resistant and high-temperature resistant materials, which ensures good safety in use; the first clamping plate 1 and the second clamping plate 2 are made of stainless steel.
[0033] like Figure 2 and 3As shown, both the first clamping plate 1 and the second clamping plate 2 are provided with a plurality of connection holes 11 for threaded connection, which facilitates opening or fixing the first clamping plate 1 and the second clamping plate 2 to pick up and put down the test piece; in other embodiments of this utility model, the first clamping plate 1 is hinged to the second clamping plate 2 at the first end, and the first clamping plate 1 is connected to the second clamping plate 2 at the second end by a locking member. The locking member is prior art, and those skilled in the art can select it according to their needs.
[0034] In addition, the end of the first clamping plate 1 away from the combustion needle seat 100 is provided with a connecting part 5, and the connecting part 5 is provided with a threaded connection mounting hole 51. A bolt assembly passes through the mounting hole 51 to fix the fixture on the mounting base 200 of the needle flame test equipment. Furthermore, the angle between the connecting part 5 and the plane of the first clamping plate 1 is 30 to 60°. In this embodiment, the angle between the connecting part 5 and the plane of the first clamping plate 1 is 45°, so that the specimen is arranged at a set angle, which facilitates the needle flame test.
[0035] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.
Claims
1. A jig for a needle flame test, characterized by, It includes a first clamping plate (1) and a second clamping plate (2). The first clamping plate (1) includes a first flexible mesh, and the second clamping plate (2) includes a second flexible mesh. The first flexible mesh and the second flexible mesh are made of fire-resistant and high-temperature resistant materials. When the first clamping plate (1) and the second clamping plate (2) are relatively fixed, the first flexible mesh and the second flexible mesh can flexibly clamp the specimen to facilitate needle flame testing.
2. The pin flame test tooling of claim 1, wherein, The first flexible mesh includes a plurality of first metal wires (3), and the second flexible mesh includes a plurality of second metal wires (4). The first flexible mesh and the second flexible mesh are respectively disposed on both sides of the specimen to flexibly clamp the specimen.
3. The pin flame test tooling of claim 2, wherein, A plurality of the first metal wires (3) are arranged in parallel, and a plurality of the second metal wires (4) are arranged in parallel with the first metal wires (3), and the second metal wires (4) avoid the first metal wires (3) to clamp the specimen in different sections.
4. The pin flame test tooling of claim 3, wherein, The first clamping plate (1) includes a first U-shaped plate, and the two ends of the first metal wire (3) are wound around and connected to the two arms of the first U-shaped plate; the second clamping plate (2) includes a second U-shaped plate, and the two ends of the second metal wire (4) are wound around and connected to the two arms of the second U-shaped plate.
5. The pin flame test tooling of claim 4, wherein, The first clamping plate (1) and the second clamping plate (2) are provided with a first groove (12) and a second groove on their opposite side walls to accommodate the first metal wire (3) and the second metal wire (4).
6. The pin flame test tooling according to claim 4 or 5, characterized in that The first clamping plate (1) and the second clamping plate (2) are each provided with a plurality of connection holes (11) for threaded connection; or the first clamping plate (1) is hinged to the second clamping plate (2) at the first end, and the first clamping plate (1) is connected to the second clamping plate (2) at the second end by a locking member.
7. The pin flame test tooling of claim 1, wherein, The first clamping plate (1) and the second clamping plate (2) are made of stainless steel.
8. The pin flame test tooling according to any one of claims 1 to 5, 7, wherein The first clamping plate (1) has a connecting part (5) at one end away from the combustion needle seat (100), and the connecting part (5) is used to fix the tooling.
9. The pin flame test tooling of claim 8, wherein, The connecting part (5) is provided with a threaded connection mounting hole (51).
10. The fixture for needle flame testing according to claim 9, characterized in that, The angle between the connecting part (5) and the plane where the first clamping plate (1) is located is 30 to 60°.