A permanent magnet ferrite shape tolerance detection tool

Abstract

The utility model discloses a kind of permanent magnet ferrite shape and location tolerance detection tools, including channel-shaped guide rail, channel-shaped guide rail both sides have parallel groove wall, the spacing of two side groove wall is adapted to the size of the measured workpiece, and overhead plate is also erected on two side groove wall, and the surface distance of overhead plate and channel-shaped guide rail is adapted to the size of the measured workpiece another item. By accurately designing groove wall spacing and overhead plate height, the fitting condition of workpiece and groove wall, overhead plate can be quickly judged, directly reflect the parallelism of workpiece, ensure detection accuracy, effectively guarantee product quality.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet ferrite processing design and testing technology, and more specifically, it relates to a testing tool for the form and position tolerances of permanent magnet ferrite. Background Technology

[0002] The market share of permanent magnet ferrite products is increasing, but the requirements for these products are also becoming more stringent. Geometric tolerances (GMPs) have a significant impact on customer assembly. Many products meet all dimensions of customer drawings, but assembly issues often arise at the customer's site. Currently, GMP testing often relies on coordinate measuring machines (CMMs), which are inconvenient and have drawbacks such as high equipment costs and long testing times. Therefore, it is essential to develop a more convenient testing tool for product quality control. Utility model patent CN211317180U discloses a method for increasing the compressive strength of tile-shaped magnets for permanent magnet motors. This method involves placing the product on a mounting bracket and measuring it with a micrometer. The product rotates via ball bearings on the mounting bracket, and the micrometer is used to measure the rotation. This allows for rapid parallelism testing, effectively improving testing efficiency. However, this utility model cannot precisely limit the product's movement path during the testing process, affecting testing accuracy. Utility Model Content

[0003] Existing tests for the form and position tolerances of magnetic products often rely on coordinate measuring machines (CMMs), which are inconvenient to use, costly, and time-consuming. To overcome these shortcomings, this invention provides a tool for testing the form and position tolerances of permanent magnet ferrite, which can quickly inspect the straightness, parallelism, and other form and position tolerances of products, facilitating data collection and control in production.

[0004] The technical solution of this utility model is: a tool for detecting the form and position tolerances of permanent magnet ferrite, including a grooved guide rail with parallel groove walls on both sides. The distance between the two groove walls is adapted to one dimension of the workpiece being measured. A suspended plate is also mounted on the two groove walls, and the distance between the suspended plate and the surface of the grooved guide rail is adapted to another dimension of the workpiece being measured. By precisely designing the groove wall distance and the height of the suspended plate, the fit between the workpiece and the groove walls and the suspended plate can be quickly determined, directly reflecting the parallelism of the workpiece, ensuring detection accuracy, and effectively guaranteeing product quality.

[0005] Preferably, at least one of the groove walls on both sides of the grooved guide rail is adjustable. For products of various sizes and specifications produced by the enterprise, by adjusting the groove wall spacing, the inspection tool can be adapted to the width dimensions of different products, ensuring that the inspection tool can accurately detect the form and position tolerances of different products, thereby improving inspection and production efficiency.

[0006] Preferably, this invention also includes a base plate on which the grooved guide rail is mounted. The base plate provides a stable support foundation for the entire testing tool, ensuring the stability of the grooved guide rail and the entire testing tool, thereby preventing errors caused by tool shaking during the testing process and guaranteeing high-precision testing.

[0007] Preferably, one groove wall is fixed to the grooved guide rail, and the other groove wall is fixed to the base plate. The grooved guide rail has multiple sliding grooves extending along its width, and guide rail fixing screws that are threaded into the grooves and connected to the base plate are threaded through the sliding grooves. Individual groove walls are adjustable, simplifying the structure. By adjusting the position of the groove walls, the spacing between the groove walls is ensured to match the workpiece width, thereby improving detection accuracy and meeting the accuracy requirements of different production and R&D scenarios.

[0008] Alternatively, one groove wall is fixed to the grooved guide rail, while the bottom end of the other groove wall has a folded edge that fits against the base plate. The folded edge has multiple slots, within which groove wall fixing screws, threaded to the base plate, pass. The grooved guide rail has multiple sliding grooves extending along its width, within which guide rail fixing screws, threaded to the base plate, pass. Both groove walls can also be designed to be adjustable, increasing the adjustment range and flexibility. By adjusting the position of the groove walls, the groove wall spacing can be matched to the workpiece width, thereby improving detection accuracy and meeting the accuracy requirements of different production and R&D scenarios.

[0009] Preferably, the groove wall is provided with an outlet groove. This facilitates the removal of the workpiece from the grooved guide rail after the test is completed.

[0010] Preferably, the overhead panel is integrally formed with one side of the groove wall. This integrally formed structure can effectively resist the influence of external forces, maintain the structural stability of the overhead panel, and ensure that the testing tool will not be affected by structural loosening during long-term use, thus extending the service life of the testing tool.

[0011] Alternatively, the overhead panel can be welded to one side of the tank wall. This welded structure effectively resists external forces, maintaining the stability of the overhead panel structure and ensuring that the testing tool's accuracy is not affected by structural loosening during long-term use, thus extending the tool's lifespan.

[0012] The beneficial effects of this utility model are:

[0013] It is suitable for parallelism testing of all square magnets, can test the parallelism of multiple faces simultaneously, and has low manufacturing cost and high testing accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural schematic diagram of the present invention from another perspective.

[0016] In the figure, 1-base plate, 2-first dial indicator, 3-second dial indicator, 4-groove guide rail, 5-groove wall, 6-outlet groove, 7-slide groove, 8-guide rail fixing screw, 9-suspended plate, 10-standard sample block. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1:

[0019] like Figure 1 , Figure 2 As shown, a tool for inspecting the form and position tolerances of permanent magnet ferrite includes a base plate 1, a grooved guide rail 4, and a dial indicator. The grooved guide rail 4 is detachably connected to the base plate 1. The grooved guide rail 4 is made of aluminum alloy. Each side of the grooved guide rail 4 has a groove wall 5, which are parallel to each other and form a main groove. The distance between the two groove walls 5 is adapted to the length of the rectangular permanent magnet ferrite workpiece being measured. Of the groove walls 5 on both sides of the grooved guide rail 4, one is a fixed groove wall, and the other is an adjustable groove wall. The fixed groove wall is directly welded to the base plate 1, while the adjustable groove wall is integrally formed with the grooved guide rail 4. The grooved guide rail 4 has four parallel sliding grooves 7, which extend along the width direction of the grooved guide rail 4. A guide rail fixing screw 8, threaded into the base plate 1, passes through the slide groove 7. The cross-section of the slide groove 7 is T-shaped, wider at the top and narrower at the bottom. The screw head diameter of the guide rail fixing screw 8 is adapted to the width of the wider part of the top of the slide groove 7. The screw part of the guide rail fixing screw 8 can pass through the narrower part of the slide groove 7. After the guide rail fixing screw 8 is tightened, the entire guide rail fixing screw 8 is concealed in the slide groove 7, and the top of the guide rail fixing screw 8 is lower than the surface of the groove-shaped guide rail 4. The adjustable groove wall is provided with a notch to form an outlet groove 6, which allows the rectangular permanent magnet ferrite workpiece that has been inspected to be removed from the groove-shaped guide rail 4.

[0020] A suspended plate 9 is also installed on both sides of the groove wall 5. The distance between the suspended plate 9 and the surface of the groove guide rail 4 is adapted to the thickness of the rectangular permanent magnet ferrite workpiece being measured. The suspended plate 9 is integrally formed with the adjustable groove wall. There are two dial indicators, namely a first dial indicator 2 and a second dial indicator 3. The first dial indicator 2 is installed on the fixed groove wall and is used to measure the length of the rectangular permanent magnet ferrite workpiece. The second dial indicator 3 is installed on the suspended plate 9 and is used to measure the thickness of the rectangular permanent magnet ferrite workpiece. The dial indicator includes a dial, a probe, and a sleeve. The sleeve is fixedly connected to the dial and has external threads and is equipped with a back-tightening nut. The probe is slidably connected inside the sleeve and is connected to the pointer on the dial through a lever mechanism. The fixed groove wall and the overhead plate 9 are respectively provided with dial indicator mounting holes. The dial indicator mounting holes have internal threads. The sleeve of the first dial indicator 2 is threaded into the dial indicator mounting hole of the fixed groove wall. The probe of the first dial indicator 2 passes through the fixed groove wall and extends into the gap between the two groove walls 5. Similarly, the sleeve of the second dial indicator 3 is threaded into the dial indicator mounting hole of the overhead plate 9. The probe of the second dial indicator 3 passes through the overhead plate 9 and extends into the gap between the overhead plate 9 and the top surface of the grooved guide rail 4.

[0021] The process of using this tool for testing the form and position tolerances of permanent magnet ferrite is as follows: Measure the dimensions of the rectangular permanent magnet ferrite workpiece to be tested, and use a standard sample block 10 corresponding to the specifications of the rectangular permanent magnet ferrite workpiece to determine the spacing of the groove walls 5. Specifically, place the standard sample block 10 between the two groove walls 5, with the length direction of the standard sample block 10 aligned with the width direction of the main groove. Loosen the guide rail fixing screws 8 in each slide groove 7 so that the groove guide rail 4 can move along the slide groove 7 to adjust the spacing of the groove walls 5. Once the two groove walls 5 abut against the standard sample block 10, re-tighten the guide rail fixing screws 8 to fix the position of the groove walls 5. The standard sample 12 is positioned at the first dial indicator 2 and the second dial indicator 3, with the probes of the dial indicators touching each other. The positions of the first dial indicator 2 and the second dial indicator 3 are adjusted until the dial indicator pointers return to zero, thus completing the calibration of the first dial indicator 2 and the second dial indicator 3. The rectangular permanent magnet ferrite workpiece to be tested is placed in the main groove and pushed past the first dial indicator 2 and the second dial indicator 3 in sequence. The reading of the first dial indicator 2 indicates the parallelism and straightness of the front and back surfaces of the rectangular permanent magnet ferrite workpiece, while the reading of the second dial indicator 3 indicates the parallelism of the top and bottom surfaces and the straightness of the top surface. If the workpiece being tested is a magnetic tile, the reading of the first dial indicator 2 indicates the parallelism of the chordal surface of the magnetic tile, and the reading of the second dial indicator 3 indicates the parallelism of the inner and outer arcs and the straightness of the outer arc surface of the magnetic tile. The quality of the tested workpiece is determined according to the drawing requirements. Unqualified products can be rejected from the outlet groove 6.

[0022] Example 2:

[0023] A tool for testing the form and position tolerances of permanent magnet ferrite includes a base plate 1, a grooved guide rail 4, and a dial indicator. The grooved guide rail 4 is detachably connected to the base plate 1. The grooved guide rail 4 is made of aluminum alloy. Each side of the grooved guide rail 4 has a groove wall 5, which are parallel to each other and form a main groove. The distance between the two groove walls 5 is adapted to the length of the rectangular permanent magnet ferrite workpiece being tested. Unlike embodiment 1, in this embodiment, both groove walls 5 on both sides of the grooved guide rail 4 are adjustable. One adjustable groove wall has a folded edge at its bottom end that fits against the base plate 1. Two slots are provided on the folded edge, and groove wall fixing screws threaded into these slots and connected to the base plate 1 are threaded through the slots. The other adjustable groove wall is integrally formed with the grooved guide rail 4. The grooved guide rail 4 has four parallel sliding grooves 7, which extend along the width direction of the grooved guide rail 4. A guide rail fixing screw 8, threaded into the base plate 1, passes through the slide groove 7. The cross-section of the slide groove 7 is T-shaped, wider at the top and narrower at the bottom. The screw head diameter of the guide rail fixing screw 8 is adapted to the width of the wider part of the top of the slide groove 7. The screw part of the guide rail fixing screw 8 can pass through the narrower part of the slide groove 7. After the guide rail fixing screw 8 is tightened, the entire guide rail fixing screw 8 is concealed in the slide groove 7, and the top of the guide rail fixing screw 8 is lower than the surface of the groove-shaped guide rail 4. A notch is provided on the groove wall 5 to form an outlet groove 6, allowing the rectangular permanent magnet ferrite workpiece that has completed inspection to be removed from the groove-shaped guide rail 4.

[0024] A suspended plate 9 is also installed on both sides of the groove wall 5. The distance between the suspended plate 9 and the surface of the groove guide rail 4 is adapted to the thickness of the rectangular permanent magnet ferrite workpiece being measured. The suspended plate 9 is integrally formed with the adjustable groove wall. There are two dial indicators, namely a first dial indicator 2 and a second dial indicator 3. The first dial indicator 2 is installed on the fixed groove wall and is used to measure the length of the rectangular permanent magnet ferrite workpiece. The second dial indicator 3 is installed on the suspended plate 9 and is used to measure the thickness of the rectangular permanent magnet ferrite workpiece. The dial indicator includes a dial, a probe, and a sleeve. The sleeve is fixedly connected to the dial and has external threads and is equipped with a back-tightening nut. The probe is slidably connected inside the sleeve and is connected to the pointer on the dial through a lever mechanism. The fixed groove wall and the overhead plate 9 are respectively provided with dial indicator mounting holes, which have internal threads. The sleeve of the first dial indicator 2 is threaded into the dial indicator mounting hole in the fixed groove wall, and the probe of the first dial indicator 2 penetrates through the groove wall 5 and extends into the gap between the two groove walls 5. Similarly, the sleeve of the second dial indicator 3 is threaded into the dial indicator mounting hole in the overhead plate 9, and the probe of the second dial indicator 3 penetrates through the overhead plate 9 and extends into the gap between the overhead plate 9 and the top surface of the grooved guide rail 4. The rest is the same as in Embodiment 1.

[0025] The procedure for using this tool to inspect the form and position tolerances of permanent magnet ferrite is as follows: Measure the dimensions of the rectangular permanent magnet ferrite workpiece being tested. Use a standard sample block 10 corresponding to the specifications of the rectangular permanent magnet ferrite workpiece to determine the spacing of the groove walls 5. Specifically, place the standard sample block 10 between the two groove walls 5, with the length direction of the standard sample block 10 aligned with the width direction of the main groove. Loosen the guide rail fixing screws 8 in each slide groove 7, allowing the groove guide rail 4 to move along the slide groove 7 to adjust the spacing of the groove walls 5. Once the two groove walls 5 are against the standard sample block 10, re-tighten the guide rail fixing screws 8 to fix the position of the groove walls 5. Alternatively, keep the position of the groove guide rail 4 fixed and adjust the width of the main groove simply by loosening and tightening the groove wall fixing screws and moving the adjustable groove wall directly connected to the base plate 1. Both groove walls 5 can also be adjusted simultaneously. The standard sample 12 is positioned at the first dial indicator 2 and the second dial indicator 3, with the probes of the dial indicators touching each other. The positions of the first dial indicator 2 and the second dial indicator 3 are adjusted until the dial indicator pointers return to zero, thus completing the calibration of the first dial indicator 2 and the second dial indicator 3. The rectangular permanent magnet ferrite workpiece to be tested is placed in the main groove and pushed past the first dial indicator 2 and the second dial indicator 3 in sequence. The reading of the first dial indicator 2 indicates the parallelism and straightness of the front and back surfaces of the rectangular permanent magnet ferrite workpiece, while the reading of the second dial indicator 3 indicates the parallelism of the top and bottom surfaces and the straightness of the top surface. If the workpiece being tested is a magnetic tile, the reading of the first dial indicator 2 indicates the parallelism of the chordal surface of the magnetic tile, and the reading of the second dial indicator 3 indicates the parallelism of the inner and outer arcs and the straightness of the outer arc surface of the magnetic tile. The quality of the tested workpiece is determined according to the drawing requirements. Unqualified products can be rejected from the outlet groove 6.

[0026] Example 3:

[0027] A tool for inspecting the form and position tolerances of permanent magnet ferrite includes a base plate 1, a grooved guide rail 4, and a dial indicator. The grooved guide rail 4 is detachably connected to the base plate 1. The grooved guide rail 4 is made of aluminum alloy. Each side of the grooved guide rail 4 has a groove wall 5, which are parallel to each other and form a main groove. The distance between the two groove walls 5 is adapted to the length of the rectangular permanent magnet ferrite workpiece being measured. Of the groove walls 5 on both sides of the grooved guide rail 4, one is a fixed groove wall, and the other is an adjustable groove wall. The fixed groove wall is directly welded to the base plate 1, while the adjustable groove wall is integrally formed with the grooved guide rail 4. The grooved guide rail 4 has four parallel sliding grooves 7, which extend along the width direction of the grooved guide rail 4. A guide rail fixing screw 8, threaded into the base plate 1, passes through the slide groove 7. The cross-section of the slide groove 7 is T-shaped, wider at the top and narrower at the bottom. The screw head diameter of the guide rail fixing screw 8 is adapted to the width of the wider part of the top of the slide groove 7. The screw part of the guide rail fixing screw 8 can pass through the narrower part of the slide groove 7. After the guide rail fixing screw 8 is tightened, the entire guide rail fixing screw 8 is concealed in the slide groove 7, and the top of the guide rail fixing screw 8 is lower than the surface of the groove-shaped guide rail 4. The adjustable groove wall is provided with a notch to form an outlet groove 6, which allows the rectangular permanent magnet ferrite workpiece that has been inspected to be removed from the groove-shaped guide rail 4.

[0028] A suspended plate 9 is also mounted on both sides of the groove wall 5. The distance between the suspended plate 9 and the surface of the groove guide rail 4 is adapted to the thickness of the rectangular permanent magnet ferrite workpiece being measured. Unlike embodiment 1, in this embodiment, the suspended plate 9 is welded to one side of the groove wall 5. Two dial indicators are used: a first dial indicator 2 and a second dial indicator 3. The first dial indicator 2 is mounted on the fixed groove wall and is used to measure the length of the rectangular permanent magnet ferrite workpiece. The second dial indicator 3 is mounted on the suspended plate 9 and is used to measure the thickness of the rectangular permanent magnet ferrite workpiece. The dial indicator includes a dial, a probe, and a sleeve. The sleeve is fixedly connected to the dial and has external threads and a back-tightening nut. The probe is slidably connected inside the sleeve and is connected to the pointer on the dial through a lever mechanism. The fixed groove wall and the overhead plate 9 are respectively provided with dial indicator mounting holes, which have internal threads. The sleeve of the first dial indicator 2 is threaded into the dial indicator mounting hole in the fixed groove wall, and the probe of the first dial indicator 2 penetrates the fixed groove wall and extends into the gap between the two groove walls 5. Similarly, the sleeve of the second dial indicator 3 is threaded into the dial indicator mounting hole in the overhead plate 9, and the probe of the second dial indicator 3 penetrates the overhead plate 9 and extends into the gap between the overhead plate 9 and the top surface of the grooved guide rail 4. The rest is the same as in Embodiment 1.

[0029] The process of using this tool for testing the form and position tolerances of permanent magnet ferrite is as follows: Measure the dimensions of the rectangular permanent magnet ferrite workpiece to be tested, and use a standard sample block 10 corresponding to the specifications of the rectangular permanent magnet ferrite workpiece to determine the spacing of the groove walls 5. Specifically, place the standard sample block 10 between the two groove walls 5, with the length direction of the standard sample block 10 aligned with the width direction of the main groove. Loosen the guide rail fixing screws 8 in each slide groove 7 so that the groove guide rail 4 can move along the slide groove 7 to adjust the spacing of the groove walls 5. Once the two groove walls 5 abut against the standard sample block 10, re-tighten the guide rail fixing screws 8 to fix the position of the groove walls 5. The standard sample 12 is positioned at the first dial indicator 2 and the second dial indicator 3, with the probes of the dial indicators touching each other. The positions of the first dial indicator 2 and the second dial indicator 3 are adjusted until the dial indicator pointers return to zero, thus completing the calibration of the first dial indicator 2 and the second dial indicator 3. The rectangular permanent magnet ferrite workpiece to be tested is placed in the main groove and pushed past the first dial indicator 2 and the second dial indicator 3 in sequence. The reading of the first dial indicator 2 indicates the parallelism and straightness of the front and back surfaces of the rectangular permanent magnet ferrite workpiece, while the reading of the second dial indicator 3 indicates the parallelism of the top and bottom surfaces and the straightness of the top surface. If the workpiece being tested is a magnetic tile, the reading of the first dial indicator 2 indicates the parallelism of the chordal surface of the magnetic tile, and the reading of the second dial indicator 3 indicates the parallelism of the inner and outer arcs and the straightness of the outer arc surface of the magnetic tile. The quality of the tested workpiece is determined according to the drawing requirements. Unqualified products can be rejected from the outlet groove 6.

Claims

1. A tool for detecting the form and position tolerances of permanent magnet ferrite, characterized in that, It includes a grooved guide rail (4), with parallel groove walls (5) on both sides. The distance between the two groove walls (5) is adapted to one dimension of the workpiece being measured. An overhead plate (9) is also mounted on the two groove walls (5). The distance between the overhead plate (9) and the surface of the grooved guide rail (4) is adapted to another dimension of the workpiece being measured.

2. The tool for detecting the form and position tolerances of permanent magnet ferrite according to claim 1, characterized in that, At least one of the groove walls (5) on both sides of the grooved guide rail (4) is an adjustable structure.

3. The testing tool for the form and position tolerances of permanent magnet ferrite according to claim 1, characterized in that, It also includes a base plate (1) and a grooved guide rail (4) mounted on the base plate (1).

4. The tool for detecting the form and position tolerances of permanent magnet ferrite according to claim 3, characterized in that, One groove wall (5) is fixed on the grooved guide rail (4), and another groove wall is fixed on the base plate (1). The grooved guide rail (4) is provided with multiple sliding grooves (7) extending along its own width direction. The sliding grooves (7) are connected with guide rail fixing screws (8) that are threaded to the base plate (1).

5. The tool for detecting the form and position tolerances of permanent magnet ferrite according to claim 3, characterized in that, One groove wall (5) is fixed on the grooved guide rail (4), and the bottom end of another groove wall is provided with a folded edge that fits against the base plate (1). Multiple groove holes are provided on the folded edge, and groove wall fixing screws that are threaded to the base plate (1) are passed through the groove holes. Multiple sliding grooves (7) extending along their own width direction are provided on the grooved guide rail (4), and guide rail fixing screws (8) that are threaded to the base plate (1) are passed through the sliding grooves (7).

6. The testing tool for the form and position tolerances of permanent magnet ferrite according to claim 1, characterized in that, The groove wall (5) is provided with an outlet groove (6).

7. The instrument for detecting the form and position tolerances of permanent magnet ferrite according to any one of claims 1 to 6, characterized in that, The overhead panel (9) and the side wall (5) are integrally formed.

8. The instrument for detecting the form and position tolerances of permanent magnet ferrite according to any one of claims 1 to 6, characterized in that, The overhead plate (9) is welded to one side of the groove wall (5).

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