An adjustable bow plate gauge and a method for measuring engine disc shaft parts using the same

Abstract

The application discloses a kind of adjustable bow flat gauge and its measuring engine disc shaft parts method, belong to machining detection technical field.The gauge's arm is bent and is connected with scale on both sides of slide plate, and the scale on one side is slidably connected with fixed measuring unit, and the scale on the other side is slidably connected with movable measuring unit;Fixed measuring unit and movable measuring unit all include the measuring rod that the length of extension can be adjusted and can be close to or away from the movement of parts.When the gauge is measured, the length of the aluminum plate body is adjusted according to the diameter of the convex surface of the part, the diameter of the arm of the gauge is ensured to avoid the interference area of the part, and at the same time, the center line of the measuring rod can pass through the center of the part rotation;Then, the position of the measuring rod on the aluminum plate body on the other side is adjusted according to the size of the diameter of the measured part, the length measuring instrument is installed, the indicating value of the standard part and the pressure table amount are matched, and the measurement and correction are carried out, so that the measurement of disc shaft parts with different diameter sizes is realized.

Description

Technical Field

[0001] This invention belongs to the field of mechanical processing and testing technology, specifically relating to an adjustable bow-shaped flat plate measuring tool and its method for measuring engine disc shaft-type parts. Background Technology

[0002] Most current aircraft engine disc-type parts are integrated disc shafts or disc drums. When measuring the mating diameter of the groove-like features on the rim of these parts, a special bow-shaped flat plate is often required to avoid the turning surface of the central protrusion (see...). Figure 1 Measurements are taken using measuring tools. When using such measuring tools to measure different parts, there is a significant difference between the diameter of the central protrusion interference surface of each part and the diameter of the measured part. Therefore, it is usually necessary to design and manufacture special bow-shaped flat plate measuring tools of different specifications according to the structural characteristics of different parts and the size of the measured part. This results in repeated production of such measuring tools, which is not conducive to the control of production and manufacturing costs. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention aims to provide an adjustable bow-shaped flat plate measuring tool and a method for measuring engine disc shaft parts, so as to realize the measurement of disc shaft parts with different diameters.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] This invention discloses an adjustable bow-shaped flat plate measuring tool, including a slide at the bend of the arm, with scales connected to both sides of the slide at the bend of the arm. A fixed measuring unit is slidably connected to one scale, and a movable measuring unit is slidably connected to the other scale. Both the fixed measuring unit and the movable measuring unit include a measuring rod, the extension of which is adjustable and can move closer to or further away from the part.

[0006] Preferably, the scale is provided with a dovetail-shaped guide groove, through which the fixed measuring unit and the movable measuring unit slide along the scale.

[0007] Preferably, a number of locking screws are provided at both the fixed measuring unit and the scale joint, and at both the movable measuring unit and the scale joint.

[0008] Preferably, the fixed measuring unit and the movable measuring unit further include a measuring rod locking screw, through which the extension amount of the measuring rod is adjusted.

[0009] Preferably, a guide sleeve is provided on the outside of the measuring rod.

[0010] Preferably, the fixed measuring unit further includes an aluminum plate body, on which a linear slide is provided, a measuring rod is set on the linear slide, and fixed guide rails and adjustable guide rails are provided on both sides of the linear slide. A gauge clamp for mounting a length measuring instrument is provided on the side of the linear slide away from the part.

[0011] More preferably, the bottom of the aluminum plate body is provided with an adjustable positioning plate and a fine-tuning screw, and an adjusting rubber is placed between the adjustable positioning plate and the aluminum plate body.

[0012] Preferably, the movable measuring unit further includes a linear guide groove, on which a movable side positioning plate is slidably connected, and the measuring rod is mounted on the movable side positioning plate.

[0013] More preferably, the movable measuring unit further includes a tensioning cover plate, which is disposed on both sides of the measuring rod, and the top of the tensioning cover plate is provided with a movable side positioning plate locking screw.

[0014] This invention also discloses a method for measuring engine disc shaft parts using an adjustable bow-shaped flat plate measuring tool, the steps of which are as follows:

[0015] 1) Based on the diameter of the central convex surface of the part, adjust the positions of the fixed measuring unit and the movable measuring unit symmetrically with the scale to ensure that the diameter of the bent arm of the adjustable bow-shaped flat plate measuring tool avoids the interference area of ​​the part, and at the same time, make the center line of the measuring rod pass through the rotation center of the part.

[0016] 2) Based on the structural characteristics of the part being measured, replace the measuring rod, and adjust the extension of the locking measuring rods on both sides according to the required measurement depth during clamping;

[0017] 3) Adjust the position of the measuring rod in the movable measuring unit according to the diameter of the part being measured, so that the diameter value of the part is within the range of motion of the measuring rod;

[0018] 4) Install a length measuring instrument according to the tolerance of the part to be measured, and adjust the indicator value and pressure gauge value in conjunction with the standard part;

[0019] 5) Measure the part, and then recalibrate the indicated value on the standard part to ensure that it is consistent with the dial indicator value in step 5) and to ensure the accuracy of the part measurement value.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention provides an adjustable bow-shaped flat plate measuring tool. A scale is set in the bow-shaped area of ​​the measuring tool to ensure consistent stretching or shortening of the left and right sides when adjusting the fixed and movable measuring units, thus keeping the measuring rods on the same plane before and after adjustment. A slide plate at the bend arm is slidably connected to the fixed and movable measuring units, ensuring the length adjustment of the measuring tool. This measuring tool can measure mating diameters of different diameter sizes, solving the problem that bow-shaped flat plate measuring tools cannot adjust the size of the avoidance area based on the size of the central interference circle and the uniformity of the measuring range between measuring rods. It can be used to measure the precision mating diameters of integrated high-pressure turbine disks, low-pressure turbine long shafts, and journal-type parts, reducing the production of specialized measuring tools, improving the versatility and utilization rate of measuring tools, saving tooling production costs, and reducing measuring tool inventory. It has strong adaptability and field application value.

[0022] Furthermore, the positions of the fixed measuring unit and the movable measuring unit can be fixed by tightening the screws.

[0023] Furthermore, by adjusting the fine-tuning screw, the amount of pressure on the adjusting rubber can be controlled, thereby adjusting the flatness of the adjustable positioning plate relative to the movable side positioning plate, thus ensuring the uniformity of the measurement positioning plane reference.

[0024] Furthermore, the movable measuring unit is designed with a linear guide groove and a movable side positioning plate that can move along the linear guide groove. The width between the measuring rods can be adjusted according to the size of the part's measuring diameter, thereby increasing the measuring range of the measuring instrument.

[0025] This invention provides a method for measuring engine disc and shaft parts using an adjustable bow-shaped flat plate measuring tool. By using the adjustable bow-shaped flat plate measuring tool in conjunction with standard parts of different diameters, it is possible to precisely measure the groove-like annular features of discs or annular parts with different specifications and dimensions, where the center profile is higher than the measurement profile. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a traditional bow-shaped flat plate measuring tool.

[0027] Figure 2 This is a cross-sectional view of the adjustable bow-shaped flat plate measuring tool of the present invention;

[0028] Figure 3 This is a top view of the adjustable bow-shaped flat plate measuring tool of the present invention.

[0029] The components are: 1-Length measuring instrument; 2-Aluminum plate body; 3-Adjustable positioning plate; 4-Fine-adjusting screw; 5-Guide sleeve fastening bolt; 6-Fixed side guide sleeve; 7-Measuring rod; 8-Spring; 9-Adjusting rubber; 10-Moving side guide sleeve; 11-Tightening cover plate; 12-Moving side positioning plate; 13-Fixed guide rail; 14-Indicator clip; 15-Front end guide rail adjusting block; 16-Front end guide rail adjusting bolt; 17-Linear slide; 18-Adjustable guide rail; 19-Front end measuring rod locking screw; 20-Rear end guide rail adjusting bolt; 21-Rear end guide rail adjusting block; 22-Locking screw; 23-Bent arm slide; 24-Rear end measuring rod locking screw; 25-Moving side positioning plate locking screw; 26-Scale; 27-Dovetail guide rail groove; 28-Linear guide rail groove. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] The present invention will now be described in further detail with reference to the accompanying drawings:

[0033] The present invention provides an adjustable bow-shaped flat plate measuring tool, including a slide 23 at the bend of the arm. Both sides of the slide 23 at the bend of the arm are connected to a scale 26 with marked graduations. Each scale 26 is provided with a dovetail-shaped guide groove 27. A fixed measuring unit and a movable measuring unit are respectively connected to the dovetail-shaped guide groove 27 on both sides. The fixed measuring unit and the movable measuring unit are provided with a plurality of locking screws 22 at the end connected to the scale 26. Preferably, there are four locking screws 22. The symmetry of the fixed measuring unit and the movable measuring unit on both sides is controlled by adjusting the size of the scale 26 on both sides. After adjusting to the pitch circle that meets the measurement requirements, the fixed measuring unit and the movable measuring unit can be locked by the eight locking screws 22.

[0034] The fixed measuring unit includes an aluminum plate body 2. A linear slide 17 is provided at the bent arm of the end of the aluminum plate body 2. A measuring rod 7 is provided on the linear slide 17, and a fixed side guide sleeve 6 is fixed to the outside of the measuring rod 7. Fixed guide rails 13 and adjustable guide rails 18 are respectively provided on both sides of the linear slide 17. The fixed guide rails 13 have a limiting function and can control the sliding direction of the linear slide 17. The front end of the adjustable guide rail 18 is provided with a front guide rail adjusting block 15 and a front guide rail adjusting bolt 16 that cooperates with it, and the rear end is provided with a rear guide rail adjusting block 21 and a rear guide rail adjusting bolt 20 that cooperates with it. The direction of the adjustable guide rail 18 is adjusted by the front guide rail adjusting bolt 16 and the rear guide rail adjusting bolt 20, thereby controlling the parallelism of the sliding of the linear slide 17. A spring 8 for resetting is provided at the end of the linear slide 17 near the part. A gauge clip 9 is connected to the end of the linear slide 17 away from the part. A length measuring instrument 1, which is a dial indicator or a micrometer, is fixedly installed on the gauge clip 9. An adjustable positioning plate 3 and three fine-tuning screws 4 are connected to the bottom of the aluminum plate body 2. An elastic adjusting rubber 9 is placed between the adjustable positioning plate 3 and the aluminum plate body 2. The amount of pressure on the adjusting rubber 9 can be controlled by adjusting the three fine-tuning screws 4, thereby adjusting the flatness of the adjustable positioning plate 3 relative to the movable side positioning plate 12, and thus ensuring the uniformity of the measurement positioning plane reference.

[0035] The movable measuring unit includes an aluminum plate body 2. A linear guide groove 28 is provided at the bent arm of the end of the aluminum plate body 2. A movable side positioning plate 12 for adjusting the measuring diameter is slidably connected to the linear guide groove 28. A measuring rod 7 is provided on the movable side positioning plate 12. A movable side guide sleeve 10 is fixed to the outside of the measuring rod 7. Tensioning cover plates 11 are provided on both sides of the movable side guide sleeve 10. A movable side positioning plate locking screw 25 is provided on the top of the tensioning cover plate 11. The relative position of the movable side positioning plate 12 on the linear guide groove 28 is adjusted by fixing or loosening the movable side positioning plate locking screw 25, thereby controlling the diameter of the measuring instrument.

[0036] Both the fixed-side guide sleeve 6 and the movable-side guide sleeve 10 are equipped with guide sleeve fastening bolts 5 around their perimeter. The verticality of the measuring rod 7 can be controlled by the fixed-side guide sleeve 6 and the movable-side guide sleeve 10. The measuring rod 7 on one side of the fixed-side guide sleeve 6 is equipped with a front measuring rod locking screw 19, and the measuring rod 7 on one side of the movable-side guide sleeve 10 is equipped with a rear measuring rod locking screw 24. The measurement depth of the measuring rod 7 can be controlled by adjusting the front measuring rod locking screw 19 and the rear measuring rod locking screw 24.

[0037] The present invention provides a method for measuring engine disc and shaft parts using an adjustable bow-shaped flat plate measuring tool, the specific steps of which are as follows:

[0038] 1. Based on the diameter of the central convex surface of the part, adjust the length of the fixed measuring unit and the movable measuring unit on the dovetail guide groove 27 symmetrically according to the markings on the scale 26, so as to ensure that the diameter of the bent arm of the adjustable bow-shaped flat plate measuring tool avoids the interference area of ​​the part, and at the same time, make the center line of the measuring rod 7 pass through the rotation center of the part, and lock the fixed measuring unit and the movable measuring unit by locking screw 22.

[0039] 2. Based on the structural characteristics of the part being measured, replace the measuring rod 7 with one of different structures. When clamping, adjust the front measuring rod locking screw 19 and the rear measuring rod locking screw 24 to lock the measuring rod 7 according to the required measurement depth, so that the extension of the measuring rod 7 in the fixed measuring unit and the movable measuring unit is consistent.

[0040] 3. Adjust the position of the movable side positioning plate 12 according to the diameter of the part being measured, so that the diameter of the part is within the range of motion of the measuring rod 7, and lock the movable side positioning plate 12 by fixing the movable side positioning plate locking screw 25;

[0041] 4. Measure the height and flatness of the adjustable positioning plate 3 and the movable side positioning plate 12 on the platform. If there is any deviation, adjust the three fine adjustment screws 4 until the flatness between the adjustable positioning plate 3 and the movable side positioning plate 12 and the perpendicularity between the measuring rod 7 are both within 0.05mm.

[0042] 5. Based on the tolerance of the part being measured, install the length measuring instrument 1 at the gauge clamp 14, and adjust the gauge reading and pressure gauge reading in conjunction with the standard part;

[0043] 6. Measure the part, and then recalibrate the indicated value on the standard part to ensure that it is consistent with the value in step 5, thus ensuring the accuracy of the part measurement.

[0044] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An adjustable bow-shaped flat plate measuring tool, characterized in that, Includes a slide plate (23) at the bend arm, with scales (26) connected to both sides of the slide plate (23). A fixed measuring unit is slidably connected to one scale plate (26), and a movable measuring unit is slidably connected to the other scale plate (26). The fixed measuring unit includes an aluminum plate body (2), a straight slide (17) at the end of the aluminum plate body (2), a measuring rod (7) on the straight slide (17), a fixed guide rail (13) and an adjustable guide rail (18) on both sides of the straight slide (17), the fixed guide rail (13) has a limiting function and can control the sliding direction of the straight slide (17); the front end of the adjustable guide rail (18) is provided with a front guide rail adjusting block (15) and a front guide rail adjusting bolt (16) that cooperates with it, and the rear end is provided with a rear guide rail adjusting block (21) and a rear guide rail adjusting bolt (20) that cooperates with it. The direction of the adjustable guide rail (18) is adjusted by the front guide rail adjusting bolt (16) and the rear guide rail adjusting bolt (20). This controls the parallelism of the sliding of the linear slide (17); the end of the linear slide (17) near the part is provided with a spring (8) for resetting, and the end of the linear slide (17) away from the part is connected to a gauge clamp (14). A length measuring instrument (1) is fixedly installed on the gauge clamp (14). An adjustable positioning plate (3) and three fine-tuning screws (4) are connected to the bottom of the aluminum plate body (2). An elastic adjusting rubber (9) is placed between the adjustable positioning plate (3) and the aluminum plate body (2). By adjusting the three fine-tuning screws (4), the amount of pressure on the adjusting rubber (9) can be controlled, so that the flatness of the adjustable positioning plate (3) relative to the movable side positioning plate (12) can be adjusted, thereby ensuring the uniformity of the measurement positioning plane reference. The active measuring unit includes an aluminum plate body (2), a linear guide groove (28) is provided at the bent arm at the end of the aluminum plate body (2), an active side positioning plate (12) for adjusting the measuring diameter is slidably connected on the linear guide groove (28), and a measuring rod (7) is provided on the active side positioning plate (12). The extension of the measuring rod (7) can be adjusted, and it can move closer to or further away from the part.

2. The adjustable bow-shaped flat plate measuring tool according to claim 1, characterized in that, The scale (26) is provided with a dovetail-shaped guide groove (27), and the fixed measuring unit and the movable measuring unit slide along the scale (26) through the dovetail-shaped guide groove (27).

3. The adjustable bow-shaped flat plate measuring tool according to claim 1, characterized in that, Several locking screws (22) are provided at the junction of the fixed measuring unit and the scale (26) and at the junction of the movable measuring unit and the scale (26).

4. The adjustable bow-shaped flat plate measuring tool according to claim 1, characterized in that, The fixed measuring unit and the movable measuring unit also include a measuring rod locking screw, and the measuring rod (7) extends by means of the measuring rod locking screw.

5. An adjustable bow-shaped flat plate measuring tool according to claim 1, characterized in that, The measuring rod (7) is equipped with a guide sleeve.

6. The adjustable bow-shaped flat plate measuring tool according to claim 1, characterized in that, The active measuring unit also includes a tension cover plate (11), which is located on both sides of the measuring rod (7). The top of the tension cover plate (11) is provided with a movable side positioning plate locking screw (25).

7. A method for measuring engine disc and shaft parts using an adjustable bow-shaped flat plate measuring tool as described in any one of claims 1 to 6, characterized in that, The steps are as follows: 1) Based on the diameter of the central convex surface of the part, adjust the positions of the fixed measuring unit and the movable measuring unit symmetrically with the scale (26) to ensure that the diameter of the bent arm of the adjustable bow-shaped flat plate measuring tool avoids the interference area of ​​the part, and at the same time, make the center line of the measuring rod (7) pass through the rotation center of the part. 2) Based on the structural characteristics of the part being measured, replace the measuring rod (7), and adjust the extension of the locking measuring rod (7) on both sides according to the measurement depth requirements during clamping; 3) Adjust the position of the measuring rod (7) in the movable measuring unit according to the diameter of the part being measured, so that the diameter of the part is within the range of motion of the measuring rod (7); 4) Install a length measuring instrument (1) according to the tolerance of the part to be measured, and adjust the indicator value and pressure gauge value in conjunction with the standard part; 5) Measure the part, and then recalibrate the indicated value on the standard part to ensure that it is consistent with the dial indicator value in step 5) and to ensure the accuracy of the part measurement value.

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