Detection tool for detecting length of needle tube of ceramic needle

Abstract

The utility model discloses a detection tool for detecting the length of a ceramic needle tube, and aims to provide a detection tool for detecting the length of a ceramic needle tube, which is convenient to detect, high in detection precision and high in detection efficiency. The device comprises a fixed base, the fixed base is provided with a first mounting hole, a second mounting hole and a measuring tool, the first mounting hole and the second mounting hole are coaxially arranged, the first mounting hole is internally provided with a positioning piece, the positioning piece is internally provided with a measuring hole into which a ceramic needle can extend, and the measuring tool is arranged in the second mounting hole. The positioning piece abuts against the step face of the ceramic needle when the ceramic needle is inserted into the measuring hole, the measuring tool is provided with a measuring rod, and the tail end of the measuring rod penetrates through the second mounting hole and extends into the measuring hole. The utility model is applied to the technical field of ceramic needle production and manufacturing.

Description

Technical Field

[0001] This utility model relates to the technical field of ceramic needle manufacturing, and in particular to a testing fixture for detecting the length of ceramic needle tubes. Background Technology

[0002] Zirconia ceramic components have advantages such as high toughness, high bending strength, high wear resistance, excellent thermal insulation performance, and a thermal expansion coefficient close to that of steel, so they are widely used in the field of structural ceramics.

[0003] When manufacturing ceramic needles, there are strict requirements for the length of the needle tube. Because ceramic needles have steps in their structure, the current method of measuring depth with vernier calipers or measuring the total length and the step length separately with a micrometer and calculating the difference is used to detect the length of the ceramic needle tube. However, because ceramic needles have steps, when using vernier calipers to measure depth to detect the length of the ceramic needle tube, it is easy to make inaccurate positioning due to shaking, resulting in low data accuracy. Alternatively, when using a micrometer, it is necessary to measure twice to calculate the length of the needle tube, resulting in slow detection efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a testing fixture for detecting the length of ceramic needle tubes that is easy to detect, has high detection accuracy and high detection efficiency.

[0005] The technical solution adopted by this utility model is as follows: This utility model includes a fixed base, on which a first mounting hole, a second mounting hole, and a measuring tool are provided. The first mounting hole and the second mounting hole are coaxially arranged. A positioning element is provided in the first mounting hole. The positioning element is provided with a measuring hole into which a ceramic needle can be inserted. When the ceramic needle is inserted into the measuring hole, the positioning element abuts against the stepped surface of the ceramic needle. The measuring tool has a measuring rod, the end of which passes through the second mounting hole and extends into the measuring hole.

[0006] Furthermore, the positioning element includes a positioning head and an inner tube, the inner tube being embedded in the positioning head, and the measuring hole being formed in the inner tube.

[0007] Furthermore, the inner diameter of the measuring hole is adapted to the diameter of the ceramic needle.

[0008] Furthermore, the measuring instrument is a dial indicator.

[0009] Furthermore, the fixed base is provided with a first locking part and a second locking part, the first locking part can be locked in the first mounting hole, and the second locking part can be locked in the second mounting hole.

[0010] Furthermore, the first locking part includes a first locking hole and a first connecting member, the first locking hole being connected to the upper end of the first mounting hole, and the first connecting member being connected to the first locking hole.

[0011] Furthermore, the second locking part includes a second locking hole and a second connecting member. The second locking hole communicates with the upper end of the second mounting hole, and the second connecting member is connected in the second locking hole.

[0012] Furthermore, the fixed base includes a base plate and a connecting seat, with the connecting seat fixedly connected to the upper surface of the base plate.

[0013] The beneficial effects of this utility model are:

[0014] In contrast to the shortcomings of existing technologies, this invention, when measuring the length of a ceramic needle tube, first uses a standard part to zero the reading of the measuring rod, then inserts the tip of the ceramic needle axially into the measuring hole, so that the stepped surface of the ceramic needle fits against the positioning part. During this process, the tip of the ceramic needle extends into the measuring hole and pushes the measuring rod. At this time, the reading of the measuring rod is the length relative to the standard part. If the acceptable dimensional tolerance is within ±0.050mm, this invention, during measurement, uses the positioning part to abut against the stepped surface of the ceramic needle to limit the axial movement distance of the ceramic needle and position it, thereby improving the positioning accuracy and thus improving the detection accuracy. Moreover, the relative measurement method for length detection allows for intuitive and rapid results, and is easy to operate, giving this invention the advantages of easy detection, high detection accuracy, and high detection efficiency. Attached Figure Description

[0015] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the present invention when the ceramic needle is inserted;

[0017] Figure 2 This is a cross-sectional view of the present invention without the ceramic needle inserted;

[0018] Figure 3 This is a plan view of the present invention.

[0019] The attached figures are labeled as follows:

[0020] 1. Fixed base; 2. First mounting hole; 3. Second mounting hole; 5. Measuring tool; 6. Positioning component; 7. Ceramic needle; 8. Measuring hole; 9. Measuring rod; 10. Positioning head; 11. Inner tube; 12. First locking part; 13. Second locking part; 15. First locking hole; 17. Second locking hole; 19. Base plate; 20. Connecting seat.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] like Figures 1 to 3 As shown, in this embodiment, the present invention includes a fixed base 1, on which a first mounting hole 2, a second mounting hole 3, and a measuring tool 5 are provided. The first mounting hole 2 and the second mounting hole 3 are coaxially arranged. A positioning member 6 is provided in the first mounting hole 2. A measuring hole 8 is provided in the positioning member 6 for a ceramic needle 7 to be inserted. When the ceramic needle 7 is inserted into the measuring hole 8, the positioning member 6 abuts against the stepped surface of the ceramic needle 7. The measuring tool 5 has a measuring rod 9. The end of the measuring rod 9 passes through the second mounting hole 3 and extends into the measuring hole 8.

[0026] In contrast to the shortcomings of existing technologies, in this invention, when measuring the length of the ceramic needle 7, the reading of the measuring rod 9 is first zeroed using a standard part. Then, the tip of the ceramic needle 7 is inserted axially into the measuring hole 8, so that the stepped surface of the ceramic needle 7 is in contact with the positioning part 6. During this process, the tip of the ceramic needle 7 extends into the measuring hole 8 and pushes the measuring rod 9. At this time, the reading of the measuring rod 9 is the length relative to the standard part. If the acceptable dimensional tolerance is within ±0.050mm, then in this invention, the positioning part 6 abuts against the stepped surface of the ceramic needle 7 to limit the axial movement distance of the ceramic needle 7 and position it, thereby improving the positioning accuracy and thus improving the detection accuracy. Moreover, the relative measurement method for length detection allows for intuitive and rapid detection of results, and the operation is simple, giving this invention the advantages of easy detection, high detection accuracy, and high detection efficiency.

[0027] In some embodiments, the positioning element 6 includes a positioning head 10 and an inner tube 11, the inner tube 11 being embedded in the positioning head 10, and the measuring hole 8 being formed in the inner tube 11; the inner diameter of the measuring hole 8 is adapted to the diameter of the ceramic needle 7. The inner tube 11 is a ceramic tube, and its inner diameter is precisely matched to the gauge used to make the ceramic needle tube. Specifically, by setting the diameter of the measuring hole 8 to match the outer diameter of the ceramic needle 7, the outer diameter of the ceramic needle 7 can be simultaneously checked for compliance with standards when the ceramic needle 7 is inserted.

[0028] In some embodiments, the measuring instrument 5 is a dial indicator. Specifically, the measuring instrument 5 is a digital dial indicator.

[0029] In some embodiments, the fixed base 1 is provided with a first locking part 12 and a second locking part 13. The first locking part 12 can be locked into the first mounting hole 2, and the second locking part 13 can be locked into the second mounting hole 3. The first locking part 12 includes a first locking hole 15 and a first connecting member. The first locking hole 15 communicates with the upper end of the first mounting hole 2, and the first connecting member is connected to the first locking hole 15. The second locking part 13 includes a second locking hole 17 and a second connecting member. The second locking hole 17 communicates with the upper end of the second mounting hole 3, and the second connecting member is connected to the second locking hole 17. Both the first connecting member and the second connecting member are set screws. Specifically, by locking the first connecting member and the second connecting member into the first mounting hole 2 and the second mounting hole 3 respectively, the positioning member 6 and the measuring tool 5 are locked, thereby ensuring that the measuring position of the measuring tool 5 is on the same axis as the first mounting hole 2 and the second mounting hole 3.

[0030] In some embodiments, the fixed base 1 includes a base plate 19 and a connecting seat 20, the connecting seat 20 being fixedly connected to the upper surface of the base plate 19.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A testing fixture for detecting the length of a ceramic needle tube, characterized in that: It includes a fixed base (1), on which a first mounting hole (2), a second mounting hole (3) and a measuring tool (5) are provided. The first mounting hole (2) and the second mounting hole (3) are coaxially arranged. A positioning element (6) is provided in the first mounting hole (2). A measuring hole (8) is provided in the positioning element (6) for a ceramic needle (7) to be inserted. When the ceramic needle (7) is inserted into the measuring hole (8), the positioning element (6) abuts against the stepped surface of the ceramic needle (7). The measuring tool (5) has a measuring rod (9). The end of the measuring rod (9) passes through the second mounting hole (3) and extends into the measuring hole (8).

2. The testing fixture for detecting the length of a ceramic needle tube according to claim 1, characterized in that: The positioning element (6) includes a positioning head (10) and an inner tube (11), the inner tube (11) being embedded in the positioning head (10), and the measuring hole (8) being formed in the inner tube (11).

3. The testing fixture for detecting the length of a ceramic needle tube according to claim 1, characterized in that: The inner diameter of the measuring hole (8) is matched with the diameter of the ceramic needle (7).

4. The testing fixture for detecting the length of a ceramic needle tube according to claim 1, characterized in that: The measuring instrument (5) is a dial indicator.

5. The testing fixture for detecting the length of a ceramic needle tube according to claim 1, characterized in that: The fixed base (1) is provided with a first locking part (12) and a second locking part (13). The first locking part (12) can be locked in the first mounting hole (2), and the second locking part (13) can be locked in the second mounting hole (3).

6. The testing fixture for detecting the length of a ceramic needle tube according to claim 5, characterized in that: The first locking part (12) includes a first locking hole (15) and a first connector. The first locking hole (15) is connected to the upper end of the first mounting hole (2), and the first connector is connected in the first locking hole (15).

7. A testing fixture for detecting the length of a ceramic needle tube according to claim 5, characterized in that: The second locking part (13) includes a second locking hole (17) and a second connector. The second locking hole (17) is connected to the upper end of the second mounting hole (3), and the second connector is connected in the second locking hole (17).

8. A testing fixture for detecting the length of a ceramic needle tube according to any one of claims 1-7, characterized in that: The fixed base (1) includes a base plate (19) and a connecting seat (20), and the connecting seat (20) is fixedly connected to the upper surface of the base plate (19).

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