Flange face screw hole verticality detection device

Abstract

The utility model relates to a flange face screw hole perpendicularity detection device, and relates to the field of flange detection, the flange face screw hole perpendicularity detection device comprises a base, a feeding table and a test table, an axial displacement adjusting assembly is arranged on the base and used for driving the feeding table and the test table to generate relative axial displacement, and a clamping assembly is arranged on the feeding table and used for clamping the feeding table and the test table. The clamping assembly is used for clamping a flange shaft to enable the axis of the flange shaft to be located at a vertical reference position, the feeding table is provided with a detection pipe, the tail end of the feeding table is provided with an annular inflation bag capable of expanding in the radial direction, the annular inflation bag is inserted into a to-be-detected screw hole, the annular inflation bag is provided with a detection rod, and the tail end of the detection rod is provided with a laser transmitter. Laser beams emitted by the laser emitter are projected to the surface of the test board to form light spots. The annular inflation bag is in interference fit with the inner wall of the screw hole after being inflated and expanded, so that the axis of the laser transmitter coincides with the actual axis of the screw hole, the axial displacement adjusting assembly adjusts the feeding table and the test table to increase the fixed distance, and the deviation direction of the axis of the screw hole can be known by observing the moving direction of a light spot on the test table.

Description

Technical fields:

[0001] This utility model belongs to the technical field of flange inspection, and specifically refers to a flange face bolt hole perpendicularity detection device. Background technology:

[0002] A flanged shaft is a type of shaft component with a flange structure in mechanical engineering. It consists of an integrated flange and shaft body and is mainly used to achieve rigid connection or torque transmission with other components through the flange. It is widely used in automobiles, ships and other fields.

[0003] In precision motion mechanisms (such as CNC machine tool spindles and industrial robot joints) and heavy-duty power transmission systems (such as wind turbine spindles and ship propulsion shafts), flange shafts often require multiple threaded holes to ensure connection rigidity and stability. To improve connection strength, it is often necessary to check the perpendicularity of the threaded holes on the flange surface. Current technology involves screwing the corresponding threaded rod into the threaded hole on the flange surface until the rod stops wobble, then placing the top of a square firmly against the flange surface and the side of the square against the outside of the bolt, and using a feeler gauge to check the gap between the square and the bolt. This measurement method cannot confirm the direction of the threaded hole's deviation and needs improvement. Summary of the Invention:

[0004] The purpose of this invention is to provide a flange face bolt hole perpendicularity detection device to solve the technical problems mentioned in the background art.

[0005] This utility model is implemented as follows:

[0006] A flange face bolt hole perpendicularity testing device includes a base, a loading platform, and a testing platform. The loading platform and the testing platform are arranged parallel to each other in the vertical direction. The base is provided with an axial displacement adjustment component, which is used to drive the loading platform and the testing platform to generate relative axial displacement. The loading platform is provided with a clamping component, which is used to clamp the flange shaft so that its axis is in a vertical reference position. The loading platform is provided with a detection tube, and the end of the tube is provided with a radially expandable annular air bladder. The annular air bladder is inserted into the bolt hole to be tested. The annular air bladder is provided with a detection rod, which passes through the central through hole of the annular air bladder. The end of the detection rod is provided with a laser emitter, and the laser beam emitted by the laser emitter is projected onto the surface of the testing platform to form a light spot.

[0007] By adopting the above technical solution, during testing, the flange shaft is fixed by the clamping assembly, and the moving detection tube allows the annular inflatable bladder to extend into the screw hole to be tested. After the annular inflatable bladder inflates and fits against the inner wall of the screw hole, the axis of the laser emitter coincides with the actual axis of the screw hole. The laser emitter is then activated to emit a laser beam towards the test platform. The axial displacement adjustment assembly adjusts the distance between the loading platform and the test platform to increase the fixed distance. By observing the movement direction of the light spot on the test platform, the offset direction of the screw hole axis can be determined. The movement distance of the lower light spot is pre-tested on screw holes with acceptable perpendicularity when the test platform moves a fixed distance to determine the acceptable range. If the detected light spot movement distance is within the acceptable range, the perpendicularity of the shaft hole is acceptable; otherwise, it is unacceptable.

[0008] Preferably, the loading platform is located below the testing platform, and the axial single adjustment component adjusts the lifting and lowering of the testing platform.

[0009] By adopting the above technical solution, when the flange shaft has a large volume or large mass, the axial displacement adjustment mechanism does not need to move the loading platform, but only needs to move the test platform to adjust the distance, which makes it easier to reduce the load on the axial displacement adjustment mechanism.

[0010] Preferably, the base is provided with a guide post, the guide post passes through the test platform, and the guide post is provided with a displacement scale, the zero point of the scale being aligned with the initial position of the test platform.

[0011] By adopting the above technical solution, it is easier for testing personnel to verify the moving distance.

[0012] Preferably, the test platform includes a lifting frame that is slidably connected to the guide column and a transparent plate disposed on the lifting frame, wherein grid lines are engraved on the transparent plate.

[0013] By adopting the above technical solution, it is easy to locate the starting and ending positions of the light spot and to measure the distance the light spot moves.

[0014] Preferably, there are several detection tubes, and one end of the detection tube away from the annular inflatable bladder is connected to the inflator.

[0015] By adopting the above technical solution, it is convenient to inspect multiple screw holes at the same time.

[0016] Preferably, the clamping assembly includes a plurality of chucks slidably connected to the loading platform and a hydraulic rod for driving the chucks to move closer to each other. The loading platform has a shaft hole, the plurality of chucks are arranged around the axis of the shaft hole, and the plurality of chucks and the hydraulic rod are located on the side of the loading platform away from the test platform.

[0017] By adopting the above technical solution, during the positioning of the flange shaft, the flange shaft is passed through the shaft hole, and the drive cylinder drives the chucks distributed around the shaft to press against the shaft for fixation, which helps to improve the applicability of the clamping assembly.

[0018] The outstanding advantages of this utility model compared to the prior art are:

[0019] 1. This utility model uses an annular inflatable bladder to inflate and press against the inner wall of the screw hole, so that the axis of the laser emitter coincides with the actual axis of the screw hole. The axial displacement adjustment component adjusts the feeding platform and the testing platform to increase the fixed distance. By observing the movement direction of the light spot on the testing platform, the offset direction of the screw hole axis can be known. The movement distance of the lower light spot of the screw hole with qualified perpendicularity is detected in advance when the testing platform moves a fixed distance to determine the qualified range. If the detected movement distance of the light spot is within the qualified range, the perpendicularity of the shaft hole is qualified; if it is not within the qualified range, it is unqualified.

[0020] 2. When the flange shaft has a large volume or large mass, the axial displacement adjustment mechanism does not need to move the loading platform. It only needs to move the test platform to adjust the distance, which makes it easier to reduce the load on the axial displacement adjustment mechanism.

[0021] 3. By setting up multiple detection tubes, this utility model facilitates the simultaneous detection of multiple screw holes, which helps to improve detection efficiency. Attached image description:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0024] Figure 3 This is a partial structural diagram of the present invention, mainly showing the connection structure of the detection tube, the annular inflatable bladder, the detection rod, and the laser emitter.

[0025] Instruction manual drawing reference numerals: 1. Base; 11. Guide column; 111. Displacement scale; 12. Inflator; 2. Loading platform; 21. Shaft hole; 3. Test platform; 31. Lifting frame; 32. Transparent plate; 321. Grid line; 4. Axial displacement adjustment assembly; 41. Drive motor; 42. Lead screw; 5. Clamping assembly; 51. Chuck; 52. Hydraulic rod; 61. Detection tube; 62. Annular inflatable bladder; 63. Detection rod; 64. Laser emitter. Detailed implementation method:

[0026] The present invention will be further described below with reference to specific embodiments:

[0027] This application discloses a flange face bolt hole perpendicularity detection device. See also... Figure 1 and Figure 2 The system includes a base 1, a loading platform 2, and a testing platform 3. The loading platform 2 is located above the base 1 and is fixedly connected to the base 1. The loading platform 2 supports the flange shaft. Two guide columns 11 are fixed on the base 1, arranged vertically and horizontally. The testing platform 3 is located above the loading platform 2. The loading platform 2 and the testing platform 3 are arranged parallel to each other vertically. The guide columns 11 pass through the testing platform 3 to limit its movement. An axial displacement adjustment assembly 4 is installed on the base 1. The axial displacement adjustment assembly 4 includes a drive motor 41 fixed to the base 1 and a lead screw 42 rotatably connected to the base 1. The lead screw 42 is threadedly connected to the testing platform 3. The drive motor 41 drives the lead screw 42 to rotate, causing the testing platform 3 to rise and fall. In other embodiments, the axial displacement adjustment assembly 4 can also be a stroke cylinder.

[0028] See Figure 1 and Figure 2 One of the guide pillars 11 has a displacement scale 111 machined on it. The displacement scale 111 is located above the loading platform 2. The scale of the displacement scale 111 is distributed vertically. The zero point of the scale of the displacement scale 111 is aligned with the initial position of the test platform 3, so that the tester can read the moving distance of the test platform 3.

[0029] See Figure 1 and Figure 2 The loading platform 2 has a shaft hole 21 for the flange shaft to pass through. The flange of the flange shaft is located above the loading platform 2 and fits against the surface of the loading platform 2. A clamping assembly 5 is installed below the loading platform 2. The clamping assembly 5 is used to clamp the shaft portion that passes through the shaft hole 21, so that the axis of the shaft portion is coaxial with the axis of the shaft hole 21 and both are in a vertical state. The clamping assembly 5 includes several chucks 51 and several hydraulic rods 52. The several chucks 51 are evenly distributed around the axis of the shaft hole 21. The several chucks 51 are slidably connected to the loading platform 2. The several chucks 51 slide closer to or away from the axis of the shaft hole 21. The position and number of hydraulic rods 52 correspond one-to-one with the position and number of chucks 51. The hydraulic rods 52 are located on the side of the corresponding chuck 51 away from the shaft hole 21. The hydraulic rods 52 drive the chucks 51 to move. The several chucks 51 circumferentially press against the flange shaft portion, so that the flange shaft portion is coaxial with the shaft hole 21.

[0030] See Figure 1 and Figure 3An inflator 12 is fixed on the base 1, and several detection tubes 61 are installed on the loading platform 2. One end of the detection tube 61 is fixed to the inflation port of the inflator 12, and the end of the detection tube 61 away from the inflator 12 is the end. An annular inflation bladder 62 is fixed to the end of the detection tube 61. The detection tube 61 passes through the loading platform 2 so that the annular inflation bladder 62 is inserted into the screw hole to be tested. The inflator 12 inflates the annular inflation bladder 62 through the detection tube 61, and the annular inflation bladder 62 expands radially. A detection rod 63 is fixed on the annular inflatable bladder 62. The detection rod 63 is cylindrical and passes through the central through hole of the annular inflatable bladder 62. The axis of the detection rod 63 is coaxial with the annular inflatable bladder 62. The end of the detection rod 63 away from the detection tube 61 is the end point. A laser emitter 64 is fixed to the end point of the detection rod 63. The light beam emitted by the laser emitter 64 is on the same straight line as the axis of the detection rod 63. The laser emitter 64 faces the test stage 3.

[0031] See Figure 1 and Figure 3 The test platform 3 includes a lifting frame 31 and a transparent plate 32. The guide column 11 and the lead screw 42 are both connected to the lifting frame 31. The transparent plate 32 is fixed to the lifting frame 31. The transparent plate 32 and the loading platform 2 are vertically distributed. The laser emitter 64 faces the transparent plate 32. The laser beam emitted by the laser emitter 64 is projected onto the transparent plate 32, forming a light spot on the transparent plate 32. The transparent plate 32 is engraved with grid lines 321 to facilitate the tester to locate the beginning and end positions of the light spot.

[0032] Before the actual testing, a pre-test is conducted to determine the acceptable range. The specific steps are as follows: First, install the flange shaft with the screw hole at the acceptable critical value perpendicularity onto the loading platform 2. Insert the annular airbag into the screw hole, and inflate the annular airbag with the air inflator 12. The annular airbag is interference-fitted with the inner wall of the screw hole. At this time, the axis of the detection rod 63 is aligned with the axis of the screw hole. The laser emitter 64 emits a laser to obtain the starting position of the light spot on the transparent plate 32. The drive motor 41 drives the lead screw 42 to rotate, causing the lifting frame 31 to move a certain distance away from the loading platform 2. The ending position of the light spot is then obtained on the transparent plate 32, and the distance between the two is measured to obtain the acceptable range.

[0033] Install the flange shaft to be tested onto the loading platform 2 and repeat the above steps. If the distance between the starting and ending positions of the light spot is within the acceptable range, it is acceptable; if the distance between the starting and ending positions of the light spot is not within the acceptable range, it is unacceptable.

[0034] The implementation principle of this embodiment is as follows: When the annular airbag 62 is inflated, it forms an interference fit with the inner wall of the screw hole, thereby aligning the axis of the laser emitter 64 with the actual axis of the screw hole. Subsequently, the distance between the loading platform 2 and the testing platform 3 is increased. If there is an angle of inclination between the axis of the screw hole and the axis of the flange shaft, the light spot will move during the movement of the testing platform 3. The direction of the light spot's movement precisely reflects the offset direction of the screw hole axis, allowing the tester to easily determine the offset direction and correct the screw hole axis based on the test results.

[0035] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A flange face bolt hole perpendicularity testing device, characterized in that: The system includes a base (1), a loading platform (2), and a testing platform (3). The loading platform (2) and the testing platform (3) are arranged parallel to each other in the vertical direction. The base (1) is provided with an axial displacement adjustment component (4), which is used to drive the loading platform (2) and the testing platform (3) to generate relative axial displacement. The loading platform (2) is provided with a clamping component (5), which is used to clamp the flange shaft so that its axis is in a vertical state. The loading platform (2) is equipped with... There is a detection tube (61) with a radially expandable annular air bladder (12) at the end. The annular air bladder (12) is inserted into the screw hole to be tested and is interference-fitted with the screw hole. The annular air bladder (12) is provided with a detection rod (63). The detection rod (63) passes through the central through hole of the annular air bladder (12). The end of the detection rod (63) is provided with a laser emitter (64). The laser beam emitted by the laser emitter (64) is projected onto the surface of the test platform (3) to form a light spot.

2. The flange face bolt hole perpendicularity detection device according to claim 1, characterized in that: The loading platform (2) is located below the test platform (3), and the axial displacement adjustment component (4) adjusts the lifting and lowering of the test platform (3).

3. The flange face bolt hole perpendicularity detection device according to claim 2, characterized in that: The base (1) is provided with a guide post (11), the guide post (11) passes through the test platform (3), and the guide post (11) is provided with a displacement scale (111), the zero point of the displacement scale (111) is aligned with the initial position of the test platform (3).

4. The flange face bolt hole perpendicularity detection device according to claim 3, characterized in that: The test bench (3) includes a lifting frame (31) that is slidably connected to the guide column (11) and a transparent plate (32) on the lifting frame (31), and grid lines (321) are engraved on the transparent plate (32).

5. The flange face bolt hole perpendicularity testing device according to claim 1, characterized in that: There are several detection tubes (61), and one end of the detection tube (61) away from the annular inflatable bladder (12) is connected to an inflator.

6. The flange face bolt hole perpendicularity detection device according to claim 1, characterized in that: The clamping assembly (5) includes a plurality of chucks (51) slidably connected to the loading platform (2) and hydraulic rods (52) that drive the chucks (51) to move closer to each other. The loading platform (2) has a shaft hole (21). The plurality of chucks (51) are arranged around the axis of the shaft hole (21). The plurality of chucks (51) and the hydraulic rods (52) are located on the side of the loading platform (2) away from the test platform (3).

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