Annular blade arc detection tool

Abstract

The utility model relates to the technical field of annular blade detection, and provides an annular blade arc detection tool comprising a detection bench which is provided with a workpiece positioning assembly and a detection assembly. The workpiece positioning assembly comprises a bottom positioning block used for supporting the bottom side of the cambered surface plate, at least three forward positioning blocks used for supporting the front face of the cambered surface plate, an end positioning block used for determining the position of the cambered surface plate in the direction of the connecting line of the two ends, and a backward pressing block used for pressing the back face of the cambered surface plate. The detection assembly comprises a guide seat, a sliding block, a gauge setting block and a detection instrument, the detection instrument is connected to the sliding block through a mounting part, the gauge setting block is provided with gauge setting surfaces corresponding to the cambered surfaces of the protruding blocks in a one-to-one mode, and the guide seat is provided with a guide surface so that the sliding block can detect the radius of the cambered surface of each protruding block through the detection instrument when sliding along the guide surface. Compared with the prior art, the utility model has the advantages of low equipment cost, small operation difficulty and low requirements on the detection technology of an operator.

Description

Technical Field

[0001] The utility model relates to the technical field of annular blade detection, in particular to an annular blade arc detection tool. Background Art

[0002] The annular blade is one of the most important structural parts of an aircraft engine. Figure 1 As shown, the front part of the annular blade 5 is an arc panel 501, and the upper and lower parts of the back side of the arc panel 501 are arranged with a plurality of protrusions in an array at intervals along the horizontal direction of the arc panel 501, and U-shaped grooves 504 are formed between adjacent protrusions. In the figure, the A surface and the B surface of the upper protrusion 502, and the C surface of the lower protrusion 503 are all arc surfaces, wherein the arc radius of the A surface of each upper protrusion 502 is equal, the arc radius of the B surface of each upper protrusion 502 is equal, and the arc radius of the C surface of each lower protrusion 503 is equal, and the center of the A surface, the B surface and the C surface on the projection plane perpendicular to the axis should be the same. Since the arc radius of each arc surface is required to be strictly controlled, it is necessary to detect the arc radius of each arc surface.

[0003] In the prior art, the usual detection means can be carried out using a three-dimensional coordinate measuring machine or a universal tool microscope plus a micrometer. However, both operations are difficult and require high detection technology. In addition, the cost of the detection equipment is high, which increases the burden on enterprises. Utility Model Content

[0004] The utility model aims to provide an annular blade arc detection tool to solve the above-mentioned defects of the prior art.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] An annular blade arc detection tool comprises a detection platform, on which a workpiece positioning component and a detection component are arranged;

[0007] The workpiece positioning assembly includes a bottom positioning block for supporting the bottom side of the arc panel, at least three forward positioning blocks for supporting the front side of the arc panel, an end positioning block for determining the position of the arc panel in the direction of the connecting line at both ends, and a back pressing block for pressing the back side of the arc panel;

[0008] The detection assembly includes a guide seat, a slider, a table block and a detection instrument. The detection instrument is connected to the slider through a mounting component. The table block is provided with a counter surface corresponding to each arc surface of the protrusion. The guide seat is provided with a guide surface so that when the slider slides along the guide surface, the arc radius of each protrusion can be detected by the detection instrument.

[0009] Optionally, the mounting component includes a connecting seat, a first connecting rod, a second connecting rod and a mounting seat, the connecting seat is fixedly arranged on the top of the slider, one end of the first connecting rod is connected to the connecting seat through a ball joint, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the second connecting rod is connected to the mounting seat through a ball joint, and the detection instrument is installed on the mounting seat.

[0010] Optionally, a first connecting head is provided at one end of the first connecting rod connected to the second connecting rod, a second connecting head is provided at one end of the second connecting rod connected to the first connecting rod, a locking screw is connected to the second connecting head, the first connecting head is sleeved on the locking screw and is pressed between the second connecting head and the head of the locking screw.

[0011] Optionally, the sliding block is provided with a first cylindrical member for contacting the guide surface.

[0012] Optionally, the positive positioning block is provided with a second cylindrical member for contacting the arc panel.

[0013] Optionally, the back-facing pressing block is connected to a pressing plate, and brackets are provided at both ends of the testing platform, one end of the pressing plate is rotatably connected to one of the brackets, and the other end of the pressing plate is detachably connected to the other bracket.

[0014] Optionally, at least one positioning pin is provided between the back pressure block and the pressure plate, an adjusting rod is threadedly connected to the pressure plate, the adjusting rod is rotatably connected to the back pressure block, and the back pressure block is axially fixed relative to the adjusting rod.

[0015] Optionally, an annular groove is provided at the end of the adjusting rod, the back-facing pressing block is provided with a clamping groove for accommodating the end of the adjusting rod, and a clamping block is provided on a side wall of the clamping groove for clamping into the annular groove.

[0016] Optionally, the inspection tool also includes an auxiliary inspection component, which includes a sliding table block, on which is provided a first inspection table for inspecting the flatness of the side wall of the U-shaped groove in the middle of the workpiece, and a second inspection table for inspecting the flatness of the bottom of the U-shaped groove in the middle of the workpiece.

[0017] The utility model has at least the following advantages and beneficial effects: in the utility model, after the annular blade is positioned by the workpiece positioning assembly, after the detection instrument is aligned with the corresponding surface on the alignment block, the corresponding arc surface on the annular blade can be detected by sliding the slider along the guide surface of the guide seat. Compared with the prior art, the equipment cost is low, the operation difficulty is small, and the detection technology requirements for the operator are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the structure of the annular blade;

[0020] Figure 2 A diagram showing the use status of an annular blade arc detection tool provided in Example 1;

[0021] Figure 3 A schematic diagram of the structure of an annular blade arc detection tool provided in Example 1;

[0022] Figure 4 It is a schematic diagram of the connection between the back-facing pressing block and the pressing plate;

[0023] Figure 5 It is a structural diagram of the installation components;

[0024] Figure 6 A schematic diagram of the structure of an annular blade arc detection tooling provided in Example 2;

[0025] Icon: 1-testing table, 101-stand, 102-platform, 2-workpiece positioning assembly, 201-bottom positioning block, 202-positive positioning block, 2021-second cylindrical member, 203-end positioning block, 204-backward clamping block, 205-pressing plate, 206-adjusting rod, 207-bracket, 208-locating pin, 3-testing assembly, 301-guide seat, 302-slider, 3021-first cylindrical member, 303-aligning block, 3031-first counter surface, 3032-second counter surface, 3 033-the third pair of surfaces, 304-detection instrument, 305-mounting component, 3051-connecting seat, 3052-first connecting rod, 3053-second connecting rod, 3054-mounting seat, 3055-locking screw, 4-auxiliary detection component, 401-sliding block, 4011-first sliding surface, 4012-second sliding surface, 402-first detection table, 403-second detection table, 5-annular blade, 501-arc panel, 502-upper protrusion, 503-lower protrusion, 504-U-shaped groove. DETAILED DESCRIPTION

[0026] Embodiment 1

[0027] refer to Figure 2-3A circular arc detection tool for an annular blade 5 includes a detection table 1, on which a workpiece positioning component 2 and a detection component 3 are provided. In this embodiment, the detection table 1 includes a platform 102 and a stand 101 which are perpendicular to each other, and the workpiece positioning component 2 includes a bottom positioning block 201, a forward positioning block 202, an end positioning block 203 and a rear clamping block 204.

[0028] The bottom positioning block 201 is fixedly connected to the platform 102, and is used to support the bottom side of the arc panel 501. The end positioning block 203 is fixedly connected to the stand 101, and is used to determine the position of the arc panel 501 in the direction of the line connecting the two ends. When installing the workpiece, one end of the workpiece abuts against the end positioning block 203. In this embodiment, there are three positive positioning blocks 202, all of which are fixedly connected to the stand 101, and are used to support the front of the arc panel 501. Furthermore, in this embodiment, the positive positioning block 202 is provided with a second cylindrical member 2021 for contacting the arc panel 501, so that the contact between the positive positioning block 202 and the second cylindrical member 2021 is a line contact. On the one hand, three lines can determine an arc surface, which is convenient for positioning. On the other hand, it is convenient to reduce friction when the workpiece position is adjusted during the installation process. It should be understood that in other embodiments of the utility model, the number of positive positioning blocks 202 can also be more.

[0029] The back-facing clamping block 204 is used to clamp the back side of the arc panel 501. Specifically, the back-facing clamping block 204 of this embodiment is set as follows: the back-facing clamping block 204 is connected to the pressure plate 205, and brackets 207 are provided at both ends of the detection platform 1. The brackets 207 are fixedly connected to the stand 101. One end of the pressure plate 205 is rotatably connected to one of the brackets 207, and the other end of the pressure plate 205 is detachably connected to the other bracket 207. In order to facilitate disassembly, this embodiment adopts screw connection. On this basis, it is easy to understand that after the detection is completed, after removing some of the connecting screws at one end of the pressure plate 205, the back-facing clamping block 204 is rotated with the pressure plate 205 to remove the parts.

[0030] Furthermore, in the present embodiment, a positioning pin 208 is provided between the back pressing block 204 and the pressure plate 205. Other numbers of positioning pins 208 may also be provided in other embodiments. An adjusting rod 206 is threadedly connected to the pressure plate 205. The adjusting rod 206 is rotatably connected to the back pressing block 204, and the back pressing block 204 is axially fixed relative to the adjusting rod 206. It is worth noting that, with such a configuration, the positioning pin 208 can limit the rotation of the back pressing block 204. By turning the adjusting rod 206, the degree of compression of the back pressing block 204 can be fine-tuned.

[0031] The connection method between the back-facing pressing block 204 and the adjusting rod 206 in this embodiment is as follows: Figure 4, the end of the adjusting rod 206 is provided with an annular groove, the back pressing block 204 is provided with a slot for accommodating the end of the adjusting rod 206, and the side wall of the slot is provided with a block that is inserted into the annular groove, so that the adjusting rod 206 can be rotated and the pressing block can be driven to move at the same time. It should be understood that in other embodiments, in order to realize that the adjusting rod 206 can rotate relative to the back pressing block 204 and can drive the back pressing block 204 to move (that is, the back pressing block 204 is fixed relative to the axial direction of the adjusting rod 206), other methods can also be used, such as a bearing connection between the adjusting rod 206 and the back pressing block 204, or a T-slot is provided on the back pressing block 204, and the end of the adjusting rod 206 is set on a T-head that matches it.

[0032] The detection component 3 includes a guide seat 301, a slider 302, a table block 303 and a detection instrument 304. In this embodiment, the detection instrument 304 can be a dial indicator or a micrometer. The detection instrument 304 is connected to the slider 302 through a mounting component 305. The table block 303 is provided with a counter surface corresponding to each arc surface of the protrusion. The guide seat 301 is provided with a guide surface. It should be understood that the theoretical positions of the A surface, the B surface and the C surface on the workpiece are the same as the center of the circle of the guide surface on the projection surface perpendicular to the axis. In this way, during detection, after alignment, the slider 302 is slid along the guide surface, and the arc radius of each protrusion can be detected by the detection instrument 304.

[0033] In this embodiment, a first pair of surfaces 3031, a second pair of surfaces 3032 and a third pair of surfaces 3033 are provided on the meter block 303. It should be understood that the first pair of surfaces 3031 is located in the tangential direction of the extension surface of the theoretical arc surface of the A surface of all the upper protrusions 502, the second pair of surfaces 3032 is located in the tangential direction of the extension surface of the theoretical arc surface of the B surface of all the upper protrusions 502, and the third pair of surfaces 3033 is located in the tangential direction of the extension surface of the theoretical arc surface of the C surface of all the lower protrusions 503. When aligning the meter, the stylus of the detection instrument 304 is perpendicular to the counter surface. During detection, if the stylus is further compressed, the actual radius of the arc surface at that location is greater than the theoretical radius. If the stylus bounces up a part, the actual radius of the arc surface at that location is less than the theoretical radius.

[0034] Based on the above, refer to Figure 5The mounting component 305 of this embodiment includes a connecting seat 3051, a first connecting rod 3052, a second connecting rod 3053 and a mounting seat 3054. The connecting seat 3051 is fixedly arranged on the top of the slider 302. One end of the first connecting rod 3052 is connected to the connecting seat 3051 through a ball joint. The other end of the first connecting rod 3052 is rotatably connected to one end of the second connecting rod 3053. The other end of the second connecting rod 3053 is connected to the mounting seat 3054 through a ball joint. The detection instrument 304 is installed on the mounting seat 3054. It is worth noting that such a configuration facilitates the detection instrument 304 to be adjusted in various directions so that it can be vertically offset against the first pair of surfaces 3031, the second pair of surfaces 3032 and the third pair of surfaces 3033 respectively, so as to realize the alignment when detecting each arc surface.

[0035] It is easy to understand that the ball joint is composed of a sphere and a ball seat. In this embodiment, the position fixation between the connecting seat 3051 and the first connecting rod 3052, as well as the position fixation between the mounting seat 3054 and the second connecting rod 3053 can be achieved by utilizing the friction between the sphere and the ball seat in the ball joint. In other embodiments, a screw can also be connected to the side wall of the ball seat. After adjusting into place, the screw can be used to tighten the ball to achieve position fixation.

[0036] In this embodiment, the relative positions of the first connecting rod 3052 and the second connecting rod 3053 are fixed in the following manner: a first connecting head is provided at one end of the first connecting rod 3052 connected to the second connecting rod 3053, and a second connecting head is provided at one end of the second connecting rod 3053 connected to the first connecting rod 3052, and a locking screw 3055 is connected to the second connecting head. The first connecting head is sleeved on the locking screw 3055 and is pressed between the second connecting head and the head of the locking screw 3055. On this basis, when the relative position of the first connecting rod 3052 and the second connecting rod 3053 needs to be adjusted, the locking screw 3055 is loosened a little. After the adjustment is in place, the locking screw 3055 is tightened to achieve the relative position fixation of the first connecting rod 3052 and the second connecting rod 3053.

[0037] On the basis of the above, the slider 302 is provided with a first cylindrical member 3021 for contacting with the guide surface. Such a configuration can reduce the friction force when the slider 302 slides, and the first cylindrical member 3021 can directly adopt a cylindrical pin. In addition, it is worth noting that the guide seat 301 of this embodiment is designed in the form of a step, the slider 302 is directly placed on the step, and the first cylindrical member 3021 contacts with the vertical surface of the step. In other embodiments, a guide slot can also be designed on the guide seat 301, and the side wall of the guide slot forms a guide surface, and the slider 302 is slidably fitted in the guide slot.

[0038] Embodiment 2

[0039] This embodiment is further optimized on the basis of the first embodiment. Specifically, since it is generally necessary to detect the flatness of the side wall and the bottom wall of the middle U-shaped groove 504 on the workpiece, reference Figure 6 The detection tooling of this embodiment also includes an auxiliary detection component 4, which includes a sliding block 401. The sliding block 401 is provided with a first detection gauge 402 for detecting the flatness of the side wall of the U-shaped groove 504 in the middle of the workpiece, and a second detection gauge 403 for detecting the flatness of the bottom of the U-shaped groove 504 in the middle of the workpiece. The first detection gauge 402 adopts a lever gauge, and the second detection gauge 403 adopts a dial gauge or a micrometer.

[0040] Specifically, the sliding block 401 is provided with a first sliding surface 4011 parallel to the theoretical position of the side wall of the U-shaped groove 504 in the middle of the workpiece, and a second sliding surface 4012 parallel to the theoretical position of the bottom wall of the U-shaped groove 504 in the middle of the workpiece. The first detection table 402 is installed on the first mounting block, and the first mounting block is slid on the first sliding surface 4011 during detection. The second detection table 403 is installed on the second mounting block, and the second mounting block is slid on the second sliding surface 4012 during detection.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circular blade arc detection tool, characterized in that: The invention comprises a testing platform (1), on which a workpiece positioning component (2) and a testing component (3) are arranged; The workpiece positioning assembly (2) comprises a bottom positioning block (201) for supporting the bottom side of the curved panel (501), at least three forward positioning blocks (202) for supporting the front side of the curved panel (501), an end positioning block (203) for determining the position of the curved panel (501) in the direction of the connecting line at both ends, and a back pressing block (204) for pressing the back side of the curved panel (501); The detection assembly (3) comprises a guide seat (301), a slider (302), a counter block (303) and a detection instrument (304); the detection instrument (304) is connected to the slider (302) via a mounting component (305); the counter block (303) is provided with a counter surface corresponding to each arc surface of the convex block; the guide seat (301) is provided with a guide surface, so that when the slider (302) slides along the guide surface, the arc surface radius of each convex block can be detected by the detection instrument (304).

2. The annular blade arc detection tool according to claim 1, characterized in that: The mounting component (305) comprises a connecting seat (3051), a first connecting rod (3052), a second connecting rod (3053) and a mounting seat (3054); the connecting seat (3051) is fixedly arranged on the top of the slider (302); one end of the first connecting rod (3052) is connected to the connecting seat (3051) via a ball joint; the other end of the first connecting rod (3052) is rotatably connected to one end of the second connecting rod (3053); the other end of the second connecting rod (3053) is connected to the mounting seat (3054) via a ball joint; and the detection instrument (304) is mounted on the mounting seat (3054).

3. The annular blade arc detection tool according to claim 2, characterized in that: A first connecting head is provided at one end of the first connecting rod (3052) connected to the second connecting rod (3053), and a second connecting head is provided at one end of the second connecting rod (3053) connected to the first connecting rod (3052). A locking screw (3055) is connected to the second connecting head. The first connecting head is sleeved on the locking screw (3055) and is pressed between the second connecting head and the head of the locking screw (3055).

4. The annular blade arc detection tool according to claim 1, characterized in that: The sliding block (302) is provided with a first cylindrical member (3021) for contacting the guide surface.

5. The annular blade arc detection tool according to claim 1, characterized in that: The positive positioning block (202) is provided with a second cylindrical member (2021) for contacting the arc panel (501).

6. The annular blade arc detection tool according to claim 1, characterized in that: The back-facing pressing block (204) is connected to a pressing plate (205), and brackets (207) are provided at both ends of the testing platform (1). One end of the pressing plate (205) is rotatably connected to one of the brackets (207), and the other end of the pressing plate (205) is detachably connected to the other bracket (207).

7. The annular blade arc detection tool according to claim 6, characterized in that: At least one positioning pin (208) is provided between the back-pressure block (204) and the pressure plate (205); an adjusting rod (206) is threadedly connected to the pressure plate (205); the adjusting rod (206) is rotatably connected to the back-pressure block (204); and the back-pressure block (204) is axially fixed relative to the adjusting rod (206).

8. The annular blade arc detection tool according to claim 7, characterized in that: The end of the adjusting rod (206) is provided with an annular groove, the back-facing pressing block (204) is provided with a clamping groove for accommodating the end of the adjusting rod (206), and the side wall of the clamping groove is provided with a clamping block clamped into the annular groove.

9. The annular blade arc detection tool according to claim 1, characterized in that: The inspection tool also includes an auxiliary inspection component (4), which includes a sliding table block (401), on which is provided a first inspection table (402) for inspecting the flatness of the side wall of the U-shaped groove (504) in the middle of the workpiece, and a second inspection table (403) for inspecting the flatness of the bottom of the U-shaped groove (504) in the middle of the workpiece.

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