Fixing device capable of preparing intelligent fastener sensors in batches

Abstract

The utility model discloses a fixing device capable of preparing intelligent fastener sensors in batches, which is used for fixing a fastener, the fastener comprises a fastening end and a film coating end, and the fixing device comprises a magnet, a carrier plate and a fixing piece; the magnets can tolerate the coating temperature and are arranged on the back face of the carrier plate in an array mode. The fixing piece is installed on the front face of the carrying plate and used for fixing the fastening piece. If the fastening piece has ferromagnetism, the fixing piece is made of a magnetic material or a non-magnetic material; and if the fastener does not have ferromagnetism, the fixing piece is made of a magnetic material. The fixing device of the intelligent fastener sensor is suitable for fasteners of any size, model, shape and material, and is also suitable for non-fasteners, non-threaded and non-magnetic substrates.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic fixing devices, in particular to a fixing device capable of batch-producing intelligent fastener sensors. Background Art

[0002] Smart fastener sensors have been widely prepared for fasteners such as bolts and studs, and are used in aerospace, wind power, offshore oil and other fields. They have become an effective method for monitoring the stress and temperature status of fasteners used in large equipment.

[0003] However, the preparation technology of intelligent fastener sensors has drawbacks, especially in the preparation process, how to evenly fix the fasteners in the coating chamber and ensure that there is no displacement during the processing is one of the problems. At present, the positioning fixture used is often composed of multiple stainless steel plates. The fasteners are passed through the stainless steel plates and then fixed by bolts at the four corners. This method requires pre-preparation of holes suitable for the size and model of the bolts on the stainless steel plates, and the arrangement of the holes needs to match the size of the fastener ends, which means that stainless steel plates need to be customized for fasteners of different models and sizes, and are not reusable; at the same time, in order to ensure that the film is deposited only at the specific position of the fastener, each fastener needs to be wrapped with aluminum foil, which is a lot of work; in addition, this method is only suitable for fasteners of specific shapes and sizes, such as cylindrical bolts with a length greater than 1 cm and a width greater than 0.5 cm, and is not suitable for fasteners of irregular sizes, and fasteners with too small sizes are very difficult to operate; finally, this method is complex and cannot be processed in batches. For a large number of cases, some fasteners will be too far away from the sputtering center, affecting the performance of the sensor. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a fixing device for batch-producing intelligent fastener sensors, which is used to fix fasteners, wherein the fasteners include a fastening end and a coating end, and the fixing device includes a magnet, a carrier plate, and a fixing piece;

[0005] The magnets are arranged in an array on the back side of the carrier plate;

[0006] The fixing piece is installed on the front side of the carrier plate and is used to fix the fastener;

[0007] If the fastener has ferromagnetism, the fixing member is made of a magnetic material or a non-magnetic material; if the fastener does not have ferromagnetism, the fixing member is made of a magnetic material.

[0008] The design concept of the utility model is that it can achieve good fixation for fasteners of any material and whether they have a threaded structure:

[0009] For ferromagnetic fasteners, put a fixing piece on the fastening end of the fastener (the fixing piece can be magnetic or not), and then arrange them closely and vertically on the front end of the carrier, with the coated end of the fastener facing upward, and fix the fastener with the ferromagnetic fastener and the magnet on the back end of the carrier;

[0010] For non-ferromagnetic fasteners, a ferromagnetic fixing piece matching the structure of the fastener is put on the fastening end of the fastener, and then closely arranged and vertically placed on the front end of the carrier, with the coated end of the fastener facing upward, and the fastener is fixed by the ferromagnetic fixing piece and the magnet on the back end of the carrier;

[0011] For non-ferromagnetic fasteners with a thickness of less than 5 mm, which are not convenient to wear ferromagnetic fasteners, fasteners and magnets are placed on the front and back of the carrier plate below the fasteners. At this time, the material of the fastener is a magnet that can withstand the coating temperature. The fastener can be attracted by the magnet on the back of the carrier plate to form a fastener support point. At the same time, several groups of fasteners are placed around the fastener to fix the fastener.

[0012] Furthermore, the magnet is a high-temperature magnet, including a samarium-cobalt magnet, which has high-temperature resistance and can stably exist in a coating environment with a temperature as high as 200-600°C.

[0013] Furthermore, in the array arrangement structure of the magnets, there is no gap between the magnets to ensure sufficient magnetic field. The poles of adjacent magnets in each row are different, which is used to stabilize the magnet system and bring the magnets close to each other. If they are arranged with the same polarity, the magnets will repel each other, reducing the magnetic flux and making it difficult to fix the fasteners.

[0014] Furthermore, the magnet may be cylindrical, rectangular, or other shapes.

[0015] Further, the carrier plate is a ferromagnetic or non-ferromagnetic material, used to stabilize (connect) the magnet system on the back side and transmit the magnetic field flux to the fasteners such as bolts;

[0016] If the carrier plate is made of non-ferromagnetic material, a mounting hole is provided at one end of the carrier plate, and the mounting hole is used to fix the magnet.

[0017] Furthermore, the carrier plate has a thickness of 2-5 mm.

[0018] Furthermore, the shape of the carrier plate is circular, triangular, square, or other polygonal shapes except triangular and square.

[0019] Furthermore, the area of ​​the carrier plate is 1-300 cm 2 .

[0020] Furthermore, the fixing piece has a structure matching with the fastening end of the fastener and is used to fix the fastener.

[0021] Furthermore, the outer side structure of the fixing piece is the same as the structure of the coated end of the fastener.

[0022] Furthermore, the fixing members are provided in a plurality and are in a tightly arranged array structure.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] (1) The fixing device of the intelligent fastener sensor of the utility model is applicable to fasteners of any size, model, shape, and material, and is also applicable to non-fasteners, non-threaded, and non-magnetic substrates;

[0025] (2) The fixing device of the intelligent fastener sensor of the utility model does not need to prepare holes suitable for specific fasteners in advance, and the fasteners can be arranged closely, thereby maximizing the number of fasteners and achieving high efficiency.

[0026] (3) The fixing device of the intelligent fastener sensor of the utility model can realize the close arrangement of fasteners. Therefore, when realizing batch production of sensors, it is not necessary to wrap each fastener with aluminum foil. Only a layer of aluminum foil is needed to be wrapped around the outer surface for protection.

[0027] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the steps or devices indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a fixing device capable of batch-producing intelligent fastener sensors according to Embodiment 1 of the utility model is shown;

[0030] Figure 2 The schematic diagram of the structure of the magnet arrangement in the first embodiment of the utility model is shown;

[0031] Figure 3 It shows a top view after the fixing member is installed on the fixing member in the first embodiment of the utility model;

[0032] Figure 4It shows a schematic structural diagram of the fixing device of Example 1 of the utility model after the fastener is installed and then subjected to coating;

[0033] Figure 5 A schematic diagram of the structure of a fixing device capable of batch-producing intelligent fastener sensors according to Embodiment 3 of the present utility model is shown;

[0034] Description of reference numerals:

[0035] 1. Carrier plate; 2. Magnet; 3. Fastener; 31. Fastening end; 32. Coating end; 4. Fixing piece; 5. Magnetron sputtering cathode arc target holder; 6. Target material. DETAILED DESCRIPTION

[0036] The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed in the present invention.

[0037] The following will combine the specific embodiments of the utility model and the drawings of the specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example 1

[0039] For non-ferromagnetic, threaded fasteners3, such as Figure 1 As shown, a fixing device for batch production of intelligent fastener sensors is used to fix a fastener 3, wherein the fastener 3 includes a fastening end 31 and a coating end 32, and the fixing device includes a magnet 2, a carrier plate 1, and a fixing member 4, wherein the fixing member 4 is a magnetic material, wherein the magnet 2 is arranged in an array on the back side of the carrier plate 1; the fixing member 4 is installed on the front side of the carrier plate 1, and the fixing member 4 has a structure matching the fastening end 31 of the fastener 3, and is used to fix the fastener 3.

[0040] Specifically, Figure 2As shown, in the array arrangement structure of the magnets 2, the magnets 2 in each row have different magnetic poles. In this embodiment, the magnets 2 are high-temperature magnets, which can be samarium cobalt magnets, which have high temperature resistance and can stably exist in a coating environment with a temperature of up to 200-600°C. The magnets 2 should be placed on the carrier 1 with alternating polarities to stabilize the magnet system and bring the magnets 2 close to each other. If they are arranged with the same polarity, the magnets 2 will repel each other, reducing the magnetic flux, which is not conducive to fixing the fasteners 3.

[0041] In order to achieve dense arrangement of the fasteners 3, a plurality of fixing members 4 are provided, which are closely arranged in an array structure, and the outer structure of the fixing member 4 is the same as the structure of the coating end 32 of the fastener 3. In this way, the top view after the fixing member is installed on the fixing member 4 is as follows: Figure 3 As shown, it can be seen that the coated end 32 of the fixing member also presents a tightly arranged array structure, and the whole presents a "honeycomb" shape.

[0042] In this embodiment, the carrier plate 1 is a ferromagnetic material, specifically an iron plate with a thickness of 3 mm, a length of 10 cm, and a width of 10 cm, and the magnet 2 can be directly adsorbed on one end of the iron plate. Of course, the iron plate can also be designed to match the mounting hole of the magnet 2 structure, and the mounting hole is slightly larger than the size of the magnet 2.

[0043] In this embodiment, the fastener 3 is a non-ferromagnetic bolt, and the fixing member 4 is a nut that matches the thread structure of the non-ferromagnetic bolt, and the outer structure of the nut is the same as the head of the non-ferromagnetic bolt. Of course, if the fastener 3 is not provided with a thread structure, the fixing member 4 can be clamped with the fastening end 31 of the fastener 3 to achieve fixation.

[0044] The following is a detailed description of the steps of using the fixing device of this embodiment to fix the fastener 3 for coating:

[0045] Step 1: Use an iron plate with a thickness of 3 mm, a length of 10 cm, and a width of 10 cm as a carrier plate 1, and scrub it with acetone to remove surface dirt before use to avoid contamination of the coating chamber;

[0046] Step 2, 40 magnets 2 are evenly arranged with alternating polarities on one side of the carrier plate 1. The magnets 2 are samarium cobalt magnets, cylindrical, 5 mm in diameter, and 3 mm thick. There is no gap between the magnets 2 to ensure sufficient magnetic field;

[0047] Step 3, using M4 Inconel bolts as fasteners 3 for preparing the sensor and ferromagnetic nuts as fixing parts 4, and putting ferromagnetic nuts on all 133 M4 Inconel bolts;

[0048] Step 4, evenly arranging M4 chromium-nickel-inconel alloy bolts on the side of the carrier plate 1 where the magnet 2 is not provided, wherein 36 bolts with a length of 10 mm are placed in the center of the ferromagnetic support plate, and 97 bolts with a length of 10 mm are placed on the periphery;

[0049] Step 5: Figure 4 As shown, the fixture with the fastener 3 installed is transferred into the coating chamber, and after the required target material 6 is installed on the magnetron sputtering cathode arc target bracket 5, the coating process parameters are set to perform thin film sensor deposition.

[0050] The results show that after high-temperature coating treatment at 250°C, magnet 2 is not demagnetized, fastener 3 is not displaced, and the ultrasonic signal of the prepared intelligent fastener sensor is excellent.

[0051] Example 2

[0052] For a ferromagnetic fastener 3 with a thread, a fixing device for batch production of intelligent fastener sensors is provided. Compared with Example 1, the difference is that a fixing member 4 is a non-magnetic nut that matches the threaded structure of the fastener 3. After the fixing member 4 is installed with the fastener 3, the fastener 3 can be fixed on the carrier 1 through the magnetic attraction between the fastener 3 and the magnet 2.

[0053] Example 3

[0054] For non-ferromagnetic, non-threaded fasteners 3 (brass material, cylindrical, 5 cm in diameter, 4 mm thick), such as Figure 5 As shown, a fixing device for batch production of intelligent fastener sensors is different from Example 1 in that: the fixing member 4 is arranged around the fastener 3. Since the fixing member 4 is a magnetic material, it can be magnetically fixed with the magnet 2 to form a support point for the fastener 3. At the same time, several groups of fixing members 4 are placed around the fastener 3 to fix the fastener 3.

[0055] Example 4

[0056] It is basically the same as Example 1, except that the material of the carrier 1 is non-ferromagnetic material, and a mounting hole for fixing the magnet 2 is provided at one end of the carrier 1. The size of the mounting hole is slightly smaller than the magnet 2, and the magnet 2 is clamped. The arrangement of the mounting holes is the same as the preset array structure of the magnet 2.

[0057] In summary, the fixing device of the utility model for batch production of intelligent fastener sensors has a simple structure and is easy to operate. It does not require pre-preparation of holes suitable for specific fasteners, and the fasteners can be tightly arranged, which maximizes the number of fasteners and is highly efficient. At the same time, it is suitable for fasteners of any size, model, shape, and material, as well as fasteners that are not threaded and non-magnetic. In addition, the fasteners are tightly arranged, so that the batch production of sensors can be achieved without the need to wrap each fastener with aluminum foil. Only a layer of aluminum foil needs to be wrapped around the outside to achieve protection.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing device for batch production of intelligent fastener sensors, used for fixing fasteners, wherein the fasteners include a fastening end and a coating end, characterized in that: The fixing device comprises a magnet, a carrier plate and a fixing member; The magnets are able to withstand the coating temperature and are arranged in an array on the back of the carrier; The fixing piece is installed on the front side of the carrier plate and is used to fix the fastener; If the fastener is ferromagnetic, the fastener is a magnetic material or a non-magnetic material; If the fastener is not ferromagnetic, the fixing member is made of magnetic material.

2. The fixing device for mass production of smart fastener sensors according to claim 1, characterized in that: If the fastener is ferromagnetic, the interior of the fixing member has a structure matching the fastening end of the fastener; The outer structure of the fixing piece is the same as the structure of the coating end of the fastener.

3. The fixing device for mass production of smart fastener sensors according to claim 2, characterized in that: The fixed members are provided in a plurality and are in a closely arranged array structure.

4. The fixing device for mass production of smart fastener sensors according to claim 1, characterized in that: If the fastener is not ferromagnetic, the fixing member is disposed around the fastener to fix the fastener on the carrier plate.

5. The fixing device for mass production of smart fastener sensors according to claim 1, characterized in that: The carrier plate is made of ferromagnetic or non-ferromagnetic material; If the carrier plate is made of non-ferromagnetic material, a mounting hole is provided at one end of the carrier plate, and the mounting hole is used to fix the magnet.

6. The fixing device for mass production of smart fastener sensors according to claim 1, characterized in that: The thickness of the carrier plate is 2-5 mm.

7. The fixing device for mass production of smart fastener sensors according to claim 1, characterized in that: The carrier plate is in a shape of a circle, a triangle, a square, or other polygons except a triangle and a square.

8. The fixing device for batch production of smart fastener sensors according to any one of claims 1 to 7, characterized in that: In the array arrangement structure of the magnets, the magnetic poles of adjacent magnets in each row are different.

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