Sensitivity test piece for magnetic powder inspection of ferromagnetic parts and use method of sensitivity test piece
By designing a sensitivity test piece for magnetic powder flaw detection of ferromagnetic parts including mounting sheets and test sheet body, the magnetic layer and limiting components are used to achieve fast, stable pasting and efficient detection of the test piece, the problems of poor pasting stability, easy damage to the test piece and long pasting time in the prior art are solved, and efficient and accurate magnetic powder flaw detection is achieved.
Patent Information
- Application Number
- CN202411761205.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-03-14
AI Technical Summary
The prior art has problems such as poor sticking stability, easy damage to the test piece and long sticking time when pasting A1 type sensitivity test piece. Especially when using tape sticking method and mechanical device sticking method, there are problems such as poor applicability and the need for special mechanical tooling.
A sensitivity test piece for detecting magnetic powder of ferromagnetic parts is provided, including a mounting piece and a test piece body, and a through hole and a limiting component are provided on the mounting piece. The test piece body is installed on the mounting piece through the through hole, and the combination is bonded to the surface of the part to be tested through a magnetic layer, and the fixing component is fixed to the part.
It realizes no tape pasting, fast pasting and high detection efficiency, avoids the need for special mechanical tools, has wide applicability, is not easy to break, has high flaw detection accuracy, and is accurate in magnetic mark display.
Smart Images
Figure CN119619275A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of magnetic particle flaw detection of parts, and in particular to a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts and a use method thereof. Background Art
[0002] A1 type sensitivity test piece is an indispensable material for the sensitivity verification system of continuous magnetic particle flaw detection of ferromagnetic parts. When used, it must be pasted on the position specified in the performance verification file. In order to ensure the accuracy of flaw detection, it is not allowed to press directly on the edge of the A1 type sensitivity test piece with fingers when pasting, so as to avoid affecting the flaw detection display of the test piece groove. In the prior art, the pasting of A1 type sensitivity test piece mainly adopts two methods: tape pasting method and mechanical device pasting method.
[0003] In actual operation, the following problems exist when using the tape pasting method to paste the A1 type sensitivity test piece: first, the oil stains on the surface of the parts must be wiped clean, otherwise the paste is not firm and easy to fall off; second, the tape is very sticky and the test piece is easy to be damaged when it is removed; third, the pasting time is long; and the mechanical device pasting method requires a special mechanical tooling, and the test piece cannot be pasted without the support of the tooling. Therefore, a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts is needed to solve the problems of poor pasting stability, easy damage to the test piece and long pasting time when the sensitivity test piece is pasted by the existing technology using the tape pasting method and the mechanical device pasting method, and the mechanical device pasting method requires special mechanical tooling and poor applicability. Summary of the invention
[0004] The object of the present invention is to provide a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts, comprising a mounting piece and a test piece body; a through hole is opened on the mounting piece, and a limiting assembly is provided on the mounting piece where an opening on one side of the through hole is located to form a mounting portion of the test piece body; a fixing assembly is provided on a body of the mounting piece away from the mounting portion; the test piece body is mounted on the mounting portion to form a combination with the mounting piece, and the side where the test piece body is located constitutes a fitting surface of the combination; the combination is fitted to the flaw detection position of the part to be tested through the fitting surface, and is fixed to the part through the fixing assembly, and the test piece body located in the through hole area constitutes a flaw detection display portion.
[0006] Preferably, the mounting piece is a rectangular structure, and is a rubber mounting piece made of rubber material, and a magnetic layer is provided on the end surface where the mounting portion is located to constitute a fixing component of the mounting piece.
[0007] Preferably, the shape of the through hole matches the shape of the test piece body.
[0008] Preferably, the size of the rectangular long side of the mounting sheet is twice the size of the rectangular wide side; the through hole is a rectangular hole structure, and the rectangular hole center of the through hole coincides with the rectangular center of the mounting sheet.
[0009] Preferably, the wide side of the rectangular hole of the through hole is perpendicular to the long side of the rectangle of the mounting plate.
[0010] Preferably, the mounting plate has grooves symmetrically formed on both sides of the through hole at the end face where the mounting portion is located to form a limit assembly; the groove direction is perpendicular to the rectangular long side of the mounting plate, and the grooves on both sides are equidistant from the two side edges of the end face of the mounting plate; the groove length is greater than the aperture of the through hole; a bending portion is provided at a position of the test piece body corresponding to the groove to form an insertion end; the test piece body is inserted into the groove through the insertion end to form a combination with the mounting plate.
[0011] Preferably, bending grooves are provided on the end face of one side of the test piece body, adjacent to the two side edges of the end face, and the test piece body is bent 90°±10° along the bending groove toward the end face without the bending groove to form a U-shaped structure. The U-shaped edges on both sides of the U-shaped structure constitute the insertion end, and the length dimension of the U-shaped edge is matched with the depth dimension of the mounting groove, and the thickness dimension of the test piece body is matched with the width dimension of the mounting groove.
[0012] Preferably, when the test piece body is inserted into the groove of the mounting plate through the insertion end, the end face of the test piece body where the bent groove is located and the end face of the mounting plate where the magnetic layer is located are on the same side.
[0013] In another aspect, the present invention further provides a method for using a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts, comprising the following steps: S1. According to the detection position size of the part to be tested, make a mounting piece and a test piece body that match the detection position size of the part; S2. The mounting sheet and the test piece body are installed to form an assembly; S3. When performing flaw detection, first remove rust and impurities from the surface of the part to be tested at the detection position, then directly attach the side of the magnetic layer of the mounting sheet of the assembly to the detection position of the part to be tested, and then perform magnetic particle inspection; S4. After the flaw detection is completed, wipe off the magnetic traces on the test piece body, remove the assembly, and finally store the mounting piece and the test piece body together.
[0014] Preferably, in S1 and S2, when manufacturing the mounting piece and the test piece body and installing the mounting piece and the test piece body to form a combination, specifically: S10. First, according to the detection position size of the part to be tested, the mounting sheet blank is selected, and a mounting sheet with a rectangular structure of matching size is cut out by a tool; then, a central rectangular hole is cut out at the center of the mounting sheet by a tool to form a through hole, and finally, grooves are symmetrically carved on both sides of the through hole on the end surface of the magnetic layer side of the mounting sheet to produce a mounting sheet; S11. Using a scribing tool to scribing on one end surface of the test piece body, and then using a tool to cut a groove to form a bending groove, and bending along the bending groove toward the end surface without a groove to form a U-shaped structure to produce a test piece body; S12. Insert the bent test piece body into the groove of the mounting piece in S10 to form a combined body. Beneficial Effects
[0015] 1. The sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts of the present invention comprises a mounting piece and a test piece body, wherein the mounting piece is provided with a magnetic layer on one side to form a single-sided magnetic mounting piece, and a through hole is provided on the mounting piece, and a combination is formed by mounting the test piece body in the through hole. When in use, the magnetic surface of the mounting piece is attached to the surface of the part to be tested, so that the test piece body is fixed to the detection position by the mounting piece, so that no tape is required for pasting, so that when pasting the test piece, only rust and impurity removal treatment is required on the surface of the part, and no degreasing is required, so that the test piece can be pasted quickly and the detection efficiency is high. Since no tape is required for pasting, no special mechanical tooling is required, and the product has a wide range of applicability.
[0016] 2. On the basis of the foregoing, the test piece body of the present invention utilizes the magnetism of the magnetic layer of the mounting piece to adhere to the surface of the part, so that the test piece body is clamped and adhered by the mounting piece. The test piece body does not need to be adhered with tape, so that the test piece body will not be affected by external forces and is not easily damaged. After the flaw detection is completed, the magnetic trace display of the test piece body is wiped clean, and the mounting piece is directly removed and placed in a test piece box for storage. The test piece is not easily damaged, which greatly extends the service life of the test piece and saves the detection cost.
[0017] 3. Based on the above, the mounting plate of the present invention is provided with grooves symmetrically on both sides of the through hole for mounting the test piece body, so as to prevent the test piece body from displacement during the flaw detection process and improve the detection accuracy.
[0018] 4. On the basis of the above, the mounting piece of the present invention is a rubber mounting piece made of rubber material, the test piece body is mounted on the magnetic surface of the mounting piece and is attached to the surface of the part, and the other end face of the mounting piece is a rubber surface. During the magnetic particle inspection process, the test piece body is displayed with magnetic traces in the through hole area of the mounting piece. Since the insertion end of the test piece body is inserted into the groove of the mounting piece, in order to avoid the display of magnetic traces at the groove position, the end face of the mounting piece away from the magnetic surface is a rubber surface, which can cover the magnetic traces at the groove, effectively display the magnetic traces, and improve the accuracy of magnetic particle inspection. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic structural diagram of a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to an embodiment. DETAILED DESCRIPTION
[0020] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments. For the sake of clarity, the test piece body B of the sensitivity test piece of the present embodiment is an A1 type sensitivity test piece.
[0021] See also Figure 1 This embodiment provides a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts, including a mounting piece A and a test piece body B; a through hole A-1 is provided on the mounting piece A, and a limit assembly is provided on the mounting piece where one side of the through hole is located, so as to form a mounting portion of the test piece body; a fixing assembly is provided on the body of the mounting piece A away from the mounting portion; the test piece body B is mounted on the mounting portion to form a combination with the mounting piece, and the side where the test piece body is located constitutes the fitting surface of the combination; the combination is fitted to the flaw detection position of the part to be tested through the fitting surface, and is fixed to the part through the fixing assembly, and the test piece body located in the through hole area constitutes the flaw detection display portion. Since the test piece body B is mounted at the through hole A-1, Figure 1 The specimen body and the through hole are overlapped for illustration.
[0022] The mounting piece A of this embodiment is a rectangular structure, and it is a rubber mounting piece made of rubber material, and the end surface where the mounting portion is located is provided with a magnetic layer to constitute a fixing component of the mounting piece. The rectangular long side dimension of the mounting piece of this embodiment is 60mm, the wide side dimension is 30mm, and the thickness is 1mm. The shape of the through hole of the mounting piece of this embodiment is adapted to the shape of the test piece body, and is also a rectangular structure, wherein the rectangular long side dimension of the through hole is 18mm, the wide side dimension is 16mm, and the rectangular hole center of the through hole coincides with the rectangular center of the mounting piece, and the wide side of the rectangular hole of the through hole is perpendicular to the rectangular long side of the mounting piece.
[0023] The mounting piece A of this embodiment has grooves A-2 symmetrically opened on both sides of the through hole A-1 at the end face where the mounting part is located to form a limit assembly; the groove direction of the groove A-2 is perpendicular to the rectangular long side of the mounting piece, and the grooves on both sides are equal in size from the two sides of the end face of the mounting piece; the groove length is greater than the aperture of the through hole, specifically 21mm, and the distance between the groove and the hole edge of the through hole is 1mm. The test piece body B is provided with a bending portion at a position corresponding to the groove A-2 to form an insertion end; the test piece body is inserted into the groove through the insertion end to form a combination with the mounting piece.
[0024] Furthermore, on the end face of one side of the test piece body B of this embodiment, the positions near the two sides of the end face are respectively provided with bending grooves, and the test piece body is bent 90°±10° along the bending groove toward the end face without the bending groove to form a U-shaped structure, and the U-shaped edges on both sides of the U-shaped structure constitute the insertion end, and the length dimension of the U-shaped edge is adapted to the depth dimension of the installation groove, specifically, the bending groove is 1mm away from the side of the end face, that is, the length dimension of the U-shaped edge. The thickness dimension of the test piece body is adapted to the width dimension of the installation groove, specifically, the groove width is not greater than 0.2mm.
[0025] In addition, when the test piece body of this embodiment is inserted into the groove of the mounting plate through the insertion end, the end surface of the test piece body where the bending groove is located is on the same side as the end surface where the magnetic layer of the mounting plate is located.
[0026] On the other hand, this embodiment also provides a method for using a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts, comprising the following steps: S1. According to the detection position size of the part to be tested, make a mounting piece and a test piece body that match the detection position size of the part; S2. The mounting sheet and the test piece body are installed to form an assembly; Specifically: S10. First, according to the detection position size of the part to be tested, select the mounting sheet blank, and use a tool to cut a mounting sheet with a rectangular structure of 60mm×30mm; then use the tool to cut a central rectangular hole with a size of 18mm×16mm at the center of the mounting sheet to form a through hole, and finally symmetrically carve grooves at a distance of 1mm on both sides of the through hole on the end surface of the magnetic layer side of the mounting sheet, the length of the groove is 21mm, the width of the groove is not more than 0.2mm, and the grooves on both sides of the through hole are equidistant from the side edges of the end surface of the mounting sheet to produce the mounting sheet; S11. Use a scribing tool to scribing on one end face of the test piece body at a distance of 1 mm from both sides of the end face to form a bending groove, and then use two blades to cooperate with each other to bend the 1 mm wide test piece body 90°±10° toward the end face without the groove, and the bent test piece body becomes a U-shaped structure to produce the test piece body; S12. Then the bent test piece body is inserted into the groove of the mounting sheet in S10, and after insertion, the groove surface of the test piece body B and the magnetic surface of the mounting sheet A are on the same side to form a combination; S3. When performing flaw detection, first remove rust and impurities from the surface of the part to be tested at the detection position, then directly attach the side of the magnetic layer of the mounting sheet of the assembly to the detection position of the part to be tested, and then perform magnetic particle inspection; S4. After the flaw detection is completed, wipe off the magnetic trace display of the test piece body, remove the assembly, and then install the test piece body on the single mounting piece A. Finally, put the mounting piece A and the test piece body B into the test piece box together.
[0027] The sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts of this embodiment is easy to use. It only takes 5 seconds to stick a piece of sensitivity test piece. The magnetism of the single-sided magnetic rubber mounting sheet A is used to stick the test piece body B to the specified position on the surface of the ferromagnetic part without the need for tape. After use, it is only necessary to wipe off the magnetic mark display of the groove of the test piece body, and the assembly can be directly removed and placed in a test piece box for storage. The test piece body is not easily damaged, the service life of the test piece is greatly extended, and the detection cost is saved. The mounting sheet A fixes the test piece body B in the center of the single-sided magnetic rubber mounting sheet A through inherent magnetism and the groove A-2. When in use, the test piece body is prevented from moving at will, and the magnetic mark display at the bend groove of the test piece body is covered by the single-sided magnetic rubber mounting sheet to avoid abnormal magnetic mark display, and the detection effect is good.
[0028] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims
1. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts, comprising a mounting piece and a test piece body; characterized in that: A through hole is provided on the mounting sheet, and a limiting component is provided on the mounting sheet where an opening on one side of the through hole is located to form a mounting portion of the test piece body; a fixing component is provided on the body of the mounting sheet away from the mounting portion; the test piece body is mounted on the mounting portion to form a combination with the mounting sheet, and the side where the test piece body is located constitutes a fitting surface of the combination; the combination is fitted to the flaw detection position of the part to be tested through the fitting surface, and is fixed to the part through the fixing component, and the test piece body located in the through hole area constitutes a flaw detection display portion.
2. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 1, characterized in that: The mounting piece is a rectangular structure and is a rubber mounting piece made of rubber material. The end surface where the mounting portion is located is provided with a magnetic layer to form a fixing component of the mounting piece.
3. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 1, characterized in that: The shape of the through hole matches the shape of the test piece body.
4. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 2, characterized in that: The size of the rectangular long side of the installation sheet is twice the size of the rectangular wide side; the through hole is a rectangular hole structure, and the rectangular hole center of the through hole coincides with the rectangular center of the installation sheet.
5. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 4, characterized in that: The wide side of the rectangular hole of the through hole is perpendicular to the rectangular long side of the mounting plate.
6. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 2, characterized in that: The mounting plate is provided with grooves symmetrically on both sides of the through hole at the end face where the mounting portion is located to form the limiting assembly; the groove direction is perpendicular to the rectangular long side of the mounting plate, and the grooves on both sides are of equal size from the two side edges of the end face of the mounting plate; the groove length is greater than the aperture of the through hole; a bending portion is provided at a position of the test piece body corresponding to the groove to form an insertion end; the test piece body is inserted into the groove through the insertion end to form a combination with the mounting plate.
7. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 6, characterized in that: On the end face of one side of the test piece body, bending grooves are respectively provided near the two side edges of the end face. The test piece body is bent 90°±10° along the bending groove toward the end face without the bending groove to form a U-shaped structure. The U-shaped edges on both sides of the U-shaped structure constitute the insertion end, and the length dimension of the U-shaped edge is adapted to the depth dimension of the mounting groove, and the thickness dimension of the test piece body is adapted to the width dimension of the mounting groove.
8. A sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 7, characterized in that: When the test piece body is inserted into the groove of the mounting piece through the insertion end, the end face of the test piece body where the bending groove is located and the end face of the mounting piece where the magnetic layer is located are on the same side.
9. A method for using a sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. According to the detection position size of the part to be tested, make a mounting piece and a test piece body that match the detection position size of the part; S2. The mounting sheet and the test piece body are installed to form an assembly; S3. When performing flaw detection, first remove rust and impurities from the surface of the part to be tested at the detection position, then directly attach the side of the magnetic layer of the mounting sheet of the assembly to the detection position of the part to be tested, and then perform magnetic particle inspection; S4. After the flaw detection is completed, wipe off the magnetic traces on the test piece body, remove the assembly, and finally store the mounting piece and the test piece body together.
10. The method for using the sensitivity test piece for magnetic particle flaw detection of ferromagnetic parts according to claim 9, characterized in that: In S1 and S2, when the mounting piece and the test piece body are manufactured and the mounting piece and the test piece body are assembled to form a combination, specifically: S10. First, according to the detection position size of the part to be tested, the mounting sheet blank is selected, and a mounting sheet with a rectangular structure of matching size is cut out by a tool; then, a central rectangular hole is cut out at the center of the mounting sheet by a tool to form a through hole, and finally, grooves are symmetrically carved on both sides of the through hole on the end surface of the magnetic layer side of the mounting sheet to produce a mounting sheet; S11. Using a scribing tool to scribing on one end surface of the test piece body, and then using a tool to cut a groove to form a bending groove, and bending along the bending groove toward the end surface without a groove to form a U-shaped structure to produce a test piece body; S12. Insert the bent test piece body into the groove of the mounting piece in S10 to form a combined body.