Rapid coaxiality inspection jig

Abstract

The utility model discloses a rapid coaxiality inspection jig, and relates to the technical field of inspection jigs, the rapid coaxiality inspection jig comprises a workbench, the top surface of the workbench is provided with a fixed plate, one side of the fixed plate is rotatably provided with a plurality of rotating rollers, the fixed plate is provided with a driving member, the output end of the driving member is engaged with a chain, and the chain is engaged with one end of each rotating roller; the fixing plate is provided with a support, the support is provided with a top plate, the top plate is located above the rotating rollers, and a pressing plate is arranged on the bottom face of the top plate and rotationally provided with a plurality of rollers. A baffle is arranged at one end of the fixed plate at the to-be-detected part; a magnetic part capable of adsorbing the to-be-detected part is arranged on one side of the baffle close to the to-be-detected part; one end of the to-be-detected member away from the magnetic member is provided with a frame plate, and the top surface of the frame plate is provided with a detection meter. The magnetic piece on the baffle plate axially attracts the to-be-detected piece to prevent the to-be-detected piece from moving along the length direction; the problem that the columnar metal to-be-detected piece moves in the length direction is solved, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] This application relates to the field of inspection fixture technology, and in particular to a rapid coaxiality inspection fixture. Background Technology

[0002] In the field of machining, the coaxiality of the inner hole is a crucial indicator for measuring the precision of cylindrical metal parts. Its accuracy directly affects the operational stability and service life of the part after assembly. Excessive deviation in the coaxiality of the inner hole can lead to problems such as jamming, accelerated wear, or even breakage during operation. Therefore, to ensure product quality, efficient and accurate testing of the coaxiality of the inner hole of cylindrical metal parts is an indispensable part of the production process.

[0003] Existing technologies include rapid testing fixtures for the coaxiality of internal holes, such as coaxiality measuring instruments. These fixtures typically include a drive unit, a positioning assembly, and a dial indicator's measuring shaft. During operation, the cylindrical metal workpiece to be tested is placed on the positioning assembly. The drive unit rotates the workpiece around its own axis, while the dial indicator's measuring shaft is inserted into the inner hole of the workpiece, making contact with the inner wall of the hole. As the workpiece rotates, the dial indicator can detect the radial runout of the inner hole wall in real time, and then calculate the coaxiality of the inner hole.

[0004] Regarding the aforementioned technologies, the inventors believe that during the testing process, cylindrical metal parts are prone to move along their own length. This movement causes a change in the relative position between the dial indicator's measuring axis and the inner hole, resulting in inaccurate radial runout detected by the dial indicator, which in turn affects the test results of the inner hole's coaxiality. Utility Model Content

[0005] The purpose of this application is to provide a rapid coaxiality inspection fixture to improve the problem that cylindrical metal parts under inspection tend to move along their own length during the inspection process, affecting the inspection results of the inner hole coaxiality.

[0006] This application provides a fixture for rapid coaxiality testing, which adopts the following technical solution:

[0007] A rapid coaxiality testing fixture includes a worktable, a fixed plate on the top surface of the worktable, a plurality of rotating rollers rotatably mounted on one side of the fixed plate, and a workpiece to be tested placed against the outer side wall of the rotating rollers. The fixed plate is equipped with a driving component, the output end of which is engaged with a chain, which meshes with one end of the rotating rollers. The fixed plate is also equipped with a support, a top plate located above the rotating rollers, and a pressure plate on the bottom surface of the top plate. The pressure plate is rotatably mounted with a plurality of rollers that conform to the outer side wall of the workpiece to be tested. A baffle is located at one end of the fixed plate near the workpiece to be tested, and a magnetic element is located on the side of the baffle closest to the workpiece to be tested to attract it. A frame plate is located at the end of the worktable away from the magnetic element, and a testing gauge is mounted on the top surface of the frame plate.

[0008] By adopting the above technical solution, the rotating roller supports the workpiece to be tested and, together with the drive unit and chain, achieves stable rotation. The pressure plate and rollers adhere to the workpiece from above and engage with the rotating roller to fix the workpiece to be tested. The magnetic component on the baffle attracts the workpiece to be tested axially, preventing the workpiece to be tested from moving along its length. This helps to solve the problem of cylindrical metal workpieces moving along their length, maintains the stability of the relative position between the detection axis and the inner hole of the test gauge, and improves the accuracy of the test results.

[0009] Optionally, the magnetic component is spherical, and the magnetic component is rolled along with the baffle.

[0010] By adopting the above technical solution, the spherical magnetic component can adaptively roll as the component under test rotates, which maintains the axial adsorption force on the component under test and reduces wear caused by friction between the magnetic component and the end of the component under test.

[0011] Optionally, the bracket includes a fixed frame connected to a fixed plate and a slide rod inserted into the fixed frame in a vertical direction, with the top plate located at the end of the slide rod away from the fixed frame; the frame plate includes a cylindrical plate and an insert plate slidably inserted into the cylindrical plate in a vertical direction, with the gauge located on the top surface of the insert plate, and the outer wall of the cylindrical plate being threaded with a fixing bolt that abuts against the insert plate.

[0012] By adopting the above technical solution, the fixed frame and sliding rod plug-in structure of the bracket can make the top plate and pressure plate move up and down with the sliding rod to adapt to the height requirements of different diameter test pieces; the cylindrical plate and the plug plate of the bracket plate are slidably plugged in and fixed with bolts, which can adjust the height of the test gauge so that its probe can be accurately inserted into the inner hole of test pieces of different diameters, thereby improving the adaptability of the fixture to different specifications of cylindrical metal test pieces and expanding the scope of application.

[0013] Optionally, an elastic element is provided on the inner bottom surface of the fixing frame, and the end of the elastic element away from the inner bottom surface of the fixing frame is fixedly connected to the slide rod.

[0014] By adopting the above technical solution, the elastic force of the elastic element will pull the slide rod to drive the top plate and pressure plate to apply downward pressure, so that the roller always fits tightly against the outer wall of the part to be tested, which enhances the pressure of the pressure plate on the part to be tested, improves the fixing effect of the part to be tested, and indirectly reduces the possibility of axial movement.

[0015] Optionally, the workbench is provided with a slide rail along its length, and the frame plate is slidably connected to the slide rail.

[0016] By adopting the above technical solution, when inspecting cylindrical metal parts of different lengths, the position of the mounting plate can be adjusted so that the probe of the test gauge is always aligned with the appropriate inspection position of the inner hole of the part, further improving the adaptability of the fixture to parts of different lengths.

[0017] Optionally, the pressure plate is set at an angle and is tangent to the outer wall of the part to be tested.

[0018] By adopting the above technical solution, the workpiece to be tested can be clamped from multiple different directions. Compared with compression in a single direction, the radial limit of the workpiece to be tested is more stable, which indirectly helps to maintain the stability of the axial position.

[0019] Optionally, the outer wall of the rotating roller is provided with a plurality of raised strips along its length.

[0020] By adopting the above technical solution, the friction between the rotating roller and the workpiece under test is increased, so that the power transmitted by the drive component through the chain can drive the workpiece under test to rotate more efficiently.

[0021] Optionally, the outer circumference of the roller is provided with anti-slip grooves.

[0022] By adopting the above technical solution, the friction between the roller and the outer wall of the workpiece under test is increased. When the workpiece under test is subjected to axial force and tends to move, the anti-slip groove can provide additional resistance to resist axial movement.

[0023] In summary, this application includes at least one of the following beneficial technical effects of a rapid coaxiality testing fixture:

[0024] 1. The rotating roller supports the workpiece to be tested and works with the drive unit and chain to achieve stable rotation. The pressure plate and rollers adhere to the workpiece from above and engage with the rotating roller to fix the workpiece in place. The magnetic component on the baffle attracts the workpiece from the axial direction, preventing it from moving along its length. This helps to solve the problem of cylindrical metal workpieces moving along their length, maintains the stability of the relative position between the detection axis and the inner hole of the test gauge, and improves the accuracy of the test results.

[0025] 2. The spherical magnetic component can roll adaptively as the workpiece rotates, which maintains the axial attraction force on the workpiece while reducing wear caused by friction between the magnetic component and the end of the workpiece.

[0026] 3. It increases the friction between the roller and the outer wall of the workpiece. When the workpiece is subjected to axial force and tends to move, the anti-slip groove can provide additional resistance to resist axial movement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the coaxiality rapid testing fixture;

[0028] Figure 2 This is a schematic diagram illustrating the structure of the magnetic component in the embodiment;

[0029] Figure 3 yes Figure 2 An enlarged schematic diagram of the structure at point A in the middle.

[0030] In the diagram, 1. Workbench; 2. Fixed plate; 21. Drive component; 22. Chain; 3. Rotating roller; 31. Raised strip; 4. Item to be tested; 5. Support; 51. Fixed frame; 52. Slide rod; 53. Elastic component; 6. Top plate; 61. Pressure plate; 611. Roller; 612. Anti-slip groove; 7. Baffle; 71. Magnetic component; 8. Frame plate; 81. Cylindrical plate; 82. Insert plate; 83. Fixing bolt; 84. Inspection gauge; 9. Slide rail. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0032] A rapid coaxiality inspection fixture, referring to Figure 1 The system includes a workbench 1, a fixed plate 2 fixed to the top surface of the workbench 1 by bolts, and a plurality of rotating rollers 3 rotatably mounted on one side of the fixed plate 2 by bearings. In this embodiment, two rollers are preferred. A plurality of protruding strips 31 are integrally provided on the outer wall of the rotating rollers 3 along their length direction. The test piece 4 is placed against the outer wall of the plurality of rotating rollers 3. The test piece 4 is a cylindrical metal part that can be placed in the support space formed between the two rotating rollers 3.

[0033] Reference Figure 1 The fixed plate 2 is fixed with a drive component 21 by bolts. The drive component 21 is a motor, and a gear is installed at the end of its output shaft. A chain 22 is engaged at the output end of the drive component 21. The chain 22 is engaged with one end of the rotating roller 3. Specifically, a gear is installed at the end of the rotating roller 3 that is close to the drive component 21.

[0034] Reference Figure 2 , Figure 3The fixed plate 2 is fixedly mounted with a bracket 5 by bolts, and the bracket 5 is provided with a top plate 6. The bracket 5 includes a fixed frame 51 connected to the fixed plate 2 by bolts and a sliding rod 52 inserted into the fixed frame 51 in the vertical direction. Specifically, the fixed frame 51 has a vertical through hole, and the sliding rod 52 passes through the through hole to achieve sliding insertion. The top plate 6 is located at the end of the sliding rod 52 away from the fixed frame 51 by welding. An elastic element 53 is fixedly mounted on the inner bottom surface of the fixed frame 51 by welding. The elastic element 53 is a spring, and the end of the elastic element 53 away from the inner bottom surface of the fixed frame 51 is fixedly connected to the sliding rod 52 by welding.

[0035] Reference Figure 2 , Figure 3 The top plate 6 is located above the rotating roller 3. A pressure plate 61 is fixed to the bottom surface of the top plate 6 by bolts. The pressure plate 61 is set at an angle and is tangent to the outer wall of the workpiece 4 to be tested. Several rollers 611 that are in contact with the outer wall of the workpiece 4 to be tested are rotatably set on the pressure plate 61 by a pin. Anti-slip grooves 612 are provided on the circumference of the outer wall of the rollers 611. The anti-slip grooves 612 are grooves that are evenly distributed along the circumference of the rollers 611 to increase the friction with the workpiece 4 to be tested.

[0036] Reference Figure 2 The fixing plate 2 is located at one end of the test piece 4 and is fixed with a baffle 7 by bolts. A magnetic component 71 that can attract the test piece 4 is provided on the side of the baffle 7 near the test piece 4. The magnetic component 71 is a permanent magnet with a spherical structure. The magnetic component 71 is embedded and rolled in the baffle 7. Specifically, the baffle 7 has a spherical groove, and the magnetic component 71 is embedded in the groove and can roll freely in the groove.

[0037] Reference Figure 1 The workbench 1 is located at the end of the workpiece 4 away from the magnetic component 71 and is equipped with a frame plate 8. The workbench 1 is equipped with a slide rail 9 along its length and the frame plate 8 is slidably connected to the slide rail 9. The top surface of the frame plate 8 is equipped with a dial indicator 84, which is a dial indicator with its probe facing the inner hole of the workpiece 4. The frame plate 8 includes a hollow cylindrical plate 81 with an opening at the top and an insert plate 82 that is slidably inserted into the cylindrical plate 81 in the vertical direction. The dial indicator 84 is fixed to the top surface of the insert plate 82 by bolts. The outer wall of the cylindrical plate 81 is threaded with a fixing bolt 83 that can abut against the insert plate 82.

[0038] The implementation principle of this application embodiment is as follows:

[0039] In actual use, the cylindrical metal part to be tested 4 is first placed on the rotating roller 3. The elastic element 53, through the slide rod 52 and the top plate 6, makes the roller 611 of the pressure plate 61 fit with the part to be tested 4 and cooperate with the rotating roller 3 to form a clamping and fixing. The magnetic element 71 of the baffle 7 attracts the part to be tested 4 from one end of the axis. The drive element 21 is started, which drives the rotating roller 3 to rotate through the chain 22, thereby driving the part to be tested 4 to rotate. The height of the frame plate 8 is adjusted so that the dial indicator probe is inserted into the inner hole and fits. When the part to be tested 4 rotates, the dial indicator detects the radial runout to reflect the coaxiality. This helps to fix the part to be tested 4 and improve the accuracy of the test.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid coaxiality inspection fixture, comprising a worktable (1), characterized in that: The workbench (1) has a fixed plate (2) on its top surface. Several rotating rollers (3) are rotatably mounted on one side of the fixed plate (2). The outer walls of the rotating rollers (3) are fitted with the parts to be tested (4). The fixed plate (2) has a driving component (21). A chain (22) is engaged at the output end of the driving component (21). The chain (22) is engaged with one end of the rotating rollers (3). The fixed plate (2) has a bracket (5). The bracket (5) has a top plate (6). The top plate (6) is located above the rotating rollers (3). The bottom surface of the top plate (6) is provided with a pressure plate (61), and the pressure plate (61) is rotatably provided with a plurality of rollers (611) that fit against the outer side wall of the part to be tested (4); the fixing plate (2) is provided with a baffle (7) at one end of the part to be tested (4), and the side of the baffle (7) close to the part to be tested (4) is provided with a magnetic element (71) that can attract the part to be tested (4); the workbench (1) is provided with a frame plate (8) at the end of the part to be tested (4) away from the magnetic element (71), and the top surface of the frame plate (8) is provided with a test gauge (84).

2. The coaxiality rapid inspection fixture according to claim 1, characterized in that: The magnetic component (71) is spherical and is rolled along with the baffle (7).

3. The coaxiality rapid inspection fixture according to claim 1, characterized in that: The bracket (5) includes a fixed frame (51) connected to the fixed plate (2) and a slide rod (52) inserted into the fixed frame (51) in the vertical direction. The top plate (6) is located at the end of the slide rod (52) away from the fixed frame (51). The frame plate (8) includes a cylindrical plate (81) and an insert plate (82) slidably inserted into the cylindrical plate (81) in the vertical direction. The gauge (84) is located on the top surface of the insert plate (82). The outer wall of the cylindrical plate (81) is threaded with a fixing bolt (83) that can abut against the insert plate (82).

4. The coaxiality rapid inspection fixture according to claim 3, characterized in that: An elastic element (53) is provided on the inner bottom surface of the fixed frame (51), and the end of the elastic element (53) away from the inner bottom surface of the fixed frame (51) is fixedly connected to the slide rod (52).

5. A coaxiality rapid inspection fixture according to claim 3, characterized in that: The workbench (1) is provided with a slide rail (9) along its length, and the frame plate (8) is slidably connected to the slide rail (9).

6. The coaxiality rapid inspection fixture according to claim 1, characterized in that: The pressure plate (61) is set at an angle and is tangent to the outer wall of the part to be tested (4).

7. The coaxiality rapid inspection fixture according to claim 1, characterized in that: The outer wall of the rotating roller (3) is provided with a plurality of raised strips (31) along its length.

8. The coaxiality rapid inspection fixture according to claim 1, characterized in that: The outer circumference of the roller (611) is provided with anti-slip grooves (612).

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