CN117419627A - Measuring tool for tooth surface coating thickness of comb tooth - Google Patents
Measuring tool for tooth surface coating thickness of comb tooth Download PDFInfo
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- CN117419627A CN117419627A CN202311408802.1A CN202311408802A CN117419627A CN 117419627 A CN117419627 A CN 117419627A CN 202311408802 A CN202311408802 A CN 202311408802A CN 117419627 A CN117419627 A CN 117419627A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 35
- 238000000576 coating method Methods 0.000 title claims abstract description 35
- 244000126211 Hericium coralloides Species 0.000 title claims description 15
- 238000007667 floating Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The measuring tool comprises a beam assembly, wherein the left end of the beam assembly is provided with a first measuring assembly for detecting the coating thickness of the upper tooth surface of the low-pressure turbine baffle; a second measuring component is arranged at the right end of the beam component and used for detecting the coating thickness of the lower tooth surface of the low-pressure turbine baffle; the beam assembly is provided with a positioning piece for being inserted into a counter bore of the low-pressure turbine baffle for positioning; the first measuring assembly comprises a first lever and a first dial indicator; the first lever can rotate around a first pin shaft in the middle of the first lever, the right end of the first lever is a measuring end, and the top surface of the left end is contacted with a measuring head of the first dial indicator; the second measuring assembly comprises a second lever and a second dial indicator, the second lever can rotate around a second pin shaft in the middle of the second lever, the left end of the second lever is a measuring end, and the top surface of the right end of the second lever is in contact with a measuring head of the second dial indicator.
Description
Technical Field
The invention relates to the manufacturing technology of aeroengines, in particular to a measuring tool for the thickness of a coating of a tooth surface of a comb tooth, which is used for detecting the thickness of the coating of the comb tooth of a baffle plate of a low-pressure turbine of an engine.
Background
As shown in fig. 1, in an aeroengine, a low-pressure turbine baffle 100 is a rotary member, a plurality of rings of comb teeth 101 are provided on the outer peripheral surface thereof, the comb teeth 101 include an upper tooth surface 102, a lower tooth surface 103, and tooth tips 104, and a counter bore 105 is provided in the center of the top surface of the low-pressure turbine baffle 100 as a positioning hole. The angle between the upper tooth surface 101 and the horizontal direction is alpha, and the angle between the lower tooth surface 103 and the horizontal direction is beta.
In the processing of the low pressure turbine baffle 100, the comb teeth 101 are required to be coated with a protective layer, as shown in fig. 1, but the coating thickness of two tooth surfaces is often much thinner than that of the tooth tip 104, and the coating thickness of the two tooth surfaces is required to be measured so as to adjust the parameter repair spraying. However, since the tooth tips 104 of two adjacent upper and lower grates 101 are spaced by about 3mm, the space between the grates 101 is small, the tooth surface coating thickness is difficult to measure, and the detection requirement cannot be met by using the conventional caliper.
Disclosure of Invention
The invention mainly aims to provide a measuring tool for the tooth surface coating thickness of a comb tooth, which can measure the tooth surface coating thickness of the comb tooth and aims to solve the technical problems.
In order to achieve the above purpose, the invention provides a measuring tool for the coating thickness of the tooth surface of a comb tooth, which comprises a beam assembly, wherein a first measuring assembly is arranged at the left end of the beam assembly and used for detecting the coating thickness of the upper tooth surface of a low-pressure turbine baffle; a second measuring component is arranged at the right end of the beam component and used for detecting the coating thickness of the lower tooth surface of the low-pressure turbine baffle; the beam assembly is provided with a positioning piece for being inserted into a counter bore of the low-pressure turbine baffle for positioning; the first measuring assembly comprises a first lever and a first dial indicator; the first lever can rotate around a first pin shaft in the middle of the first lever, the right end of the first lever is a measuring end, and the top surface of the left end is contacted with a measuring head of the first dial indicator; the second measuring assembly comprises a second lever and a second dial indicator, the second lever can rotate around a second pin shaft in the middle of the second lever, the left end of the second lever is a measuring end, and the top surface of the right end of the second lever is in contact with a measuring head of the second dial indicator.
Preferably, the beam assembly comprises a cross bar, a first support block arranged at the left end of the cross bar, and a second support block arranged at the right end of the cross bar; the first support block and the second support block are fixedly connected with the cross rod through cylindrical pins and rivets; the positioning piece comprises two first support legs and two second support legs; the two first support legs are respectively arranged on the ear plates at the front side and the rear side of the first support block; the two second support legs are respectively arranged on the ear plates at the front side and the rear side of the second support block; the lower end surfaces of the two first support legs and the two second support legs are positioned on the same plane and are used for being supported on the horizontal table surface of the counter bore of the low-pressure turbine baffle; during positioning, the outer cylindrical surfaces of the two first support legs are arranged to be positioning surfaces for abutting against the inner wall of the counter bore, and the outer cylindrical surfaces of the two second support legs are arranged at intervals with the inner wall of the counter bore.
Preferably, the first measuring assembly further comprises a first guide block and a first meter frame, wherein the right end of the first guide block is provided with a horizontal arm and is fixedly connected with the beam assembly; the left end of the first guide block is provided with an inclined first rectangular hole, the included angle between the axis of the first rectangular hole and the horizontal direction is equal to the included angle between the upper tooth surface of the low-pressure turbine baffle and the horizontal direction to be alpha; the first meter frame is inserted into the first rectangular hole; a first through groove is formed in the lower end of the first watch frame, the first lever is arranged in the first through groove, and two ends of the first pin shaft are rotatably inserted into the front side wall and the rear side wall of the first through groove; the measuring head of the first dial indicator is inserted into a hole body at the left part of the first indicator frame and is tightly propped by a first propping screw screwed on the left end surface of the first indicator frame; a first spring is arranged in the first meter frame and is in a compressed state, the first spring is positioned on the right side of the first pin shaft, and the lower end of the first spring abuts against the top surface of the measuring end of the first lever.
Preferably, the first measuring assembly further comprises a first top sheet located between the lower end surface of the first gauge stand and the bottom surface of the first rectangular hole; the bottom of the first rectangular hole is provided with a stepped counter bore and is provided with a first screw, the stud end of the first screw is connected with the first top sheet, and a gap exists between the top surface of the screw head of the first screw and the stepped counter bore, so that the first top sheet forms a floating structure; and a second jacking screw is screwed on the bottom wall of the first rectangular hole and used for jacking the first top sheet so as to push the first meter frame to be abutted against the top surface of the first rectangular hole.
Preferably, a first stop pin is inserted on the first meter frame, the first stop pin is positioned at the left side of the first pin shaft, and the lower end of the first stop pin is used for abutting against the top surface of the left end of the first lever; a first abdicating groove is formed in the top surface of the first rectangular hole; the top end of the first stop pin is positioned in the first abdication groove.
Preferably, the front side and the rear side of the left end of the first table frame are respectively integrally formed with a first boss, and a step surface of the first boss abuts against the left end surface A of the first guide block.
Preferably, the second measuring assembly further comprises a second guide block and a second meter frame, wherein the left end of the second guide block is provided with a horizontal arm and is fixedly connected with the beam assembly; the right end of the second guide block is provided with an inclined second rectangular hole, and the included angle between the axis of the second rectangular hole and the horizontal direction is equal to the included angle between the lower tooth surface of the low-pressure turbine baffle and the horizontal direction, namely beta; the second meter frame is inserted into the second rectangular hole; a second through groove is formed in the lower end of the second meter frame, the second lever is arranged in the second through groove, and two ends of the second pin shaft are rotatably inserted into the front side wall and the rear side wall of the second through groove; the measuring head of the second dial indicator is inserted into the hole body at the left part of the right part of the second meter frame and is tightly propped by a third propping screw screwed on the right end surface of the second meter frame (11); a second spring is arranged in the second meter frame and is in a compressed state, the second spring is positioned on the right side of the second pin shaft, and the lower end of the second spring is abutted against the top surface of the right end of the second lever.
Preferably, the second measuring assembly further comprises a second top sheet located between the lower end surface of the second gauge stand and the bottom surface of the second rectangular hole; a stepped counter bore is formed in the bottom of the second rectangular hole, a second screw is installed on the bottom of the second rectangular hole, the stud end of the second screw is connected with the second top piece, a gap exists between the top surface of the screw head of the second screw and the stepped counter bore, and the second top piece forms a floating structure; and a fourth jacking screw is screwed on the bottom wall of the second rectangular hole and used for jacking the second top sheet so as to push the second meter frame to be tightly abutted against the top surface of the second rectangular hole.
Preferably, a second stop pin is inserted on the second watch frame, the second stop pin is positioned at the left side of the second pin shaft, and the lower end of the second stop pin is used for abutting against the top surface of the left end of the second lever; a second abdicating groove is formed in the top surface of the second rectangular hole; the top end of the second stop pin is positioned in the second abdication groove.
Preferably, a second boss is integrally formed on the front and rear sides of the right end of the second table frame, and a step surface of the second boss abuts against the right end surface B of the second guide block.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) By adopting the measuring tool provided by the invention, the positioning piece on the beam assembly is inserted into the counter bore of the low-pressure turbine baffle for positioning, so that the whole measuring tool can be positioned on the low-pressure turbine baffle part to be detected. The spraying thickness is measured in a contrast mode, specifically, before spraying, the upper tooth surface of the low-pressure turbine baffle is detected by using a first measuring component at the left end of the measuring tool, the indication number of a first dial indicator is recorded, the lower tooth surface of the low-pressure turbine baffle is detected by using a second measuring component at the right end of the measuring tool, and the indication number of a second dial indicator is recorded. After spraying, the upper tooth surface of the low-pressure turbine baffle plate is detected by utilizing the first measuring component at the left end and the indication number of the first dial indicator is recorded, the lower tooth surface of the low-pressure turbine baffle plate is detected by utilizing the second measuring component at the right end and the indication number of the second dial indicator is recorded, and the thickness of the coating can be reflected by the indication value difference before and after spraying.
(2) The measuring tool provided by the method provides a feasible method for measuring the thickness of the coating on site, and is easy to carry out a spraying process and ensure the thickness of the coating.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a low pressure turbine baffle component in an aircraft engine;
FIG. 2 is a front cross-sectional view of the measuring tool provided by the present invention;
FIG. 3 is a top view of the measuring tool provided by the present invention;
FIG. 4 is a cross-sectional view of a first guide block of the present invention;
FIG. 5 is a view in the direction C of FIG. 4;
FIG. 6 is a top view of a first guide block of the present invention;
FIG. 7 is a cross-sectional view of a second guide block of the present invention;
FIG. 8 is a view in the direction D of FIG. 7;
FIG. 9 is a top view of a second guide block of the present invention;
FIG. 10 is a schematic perspective view of a first bezel in the present invention;
FIG. 11 is a cross-sectional view of a first case stand according to the present invention;
FIG. 12 is a schematic view of a portion of the assembly of the first measurement assembly of the present invention;
FIG. 13 is a schematic perspective view of a second bezel in the present invention;
FIG. 14 is a cross-sectional view of a second bezel in the present invention;
FIG. 15 is a schematic view of a portion of the assembly of the second measurement assembly of the present invention.
Reference numerals illustrate: 1. a beam assembly; 1a, a cross bar; 2. a first leg; 3a, a first branch block; 3b, a second branch block; 4. a first guide block; 4a, a first rectangular hole; 4b, a first abdicating groove; 5. a first bezel; 5a, a first through groove; 5b, a first jacking screw; 5c, a first stop pin; 5d, a first boss; 6. a first lever; 7. a first topsheet; 7a, a first screw; 7b, a second tightening screw; 8. a second leg; 9. a second guide block; 9a, a second rectangular hole; 9b, a second abdicating groove; 10. a second lever; 11. a second bezel; 11a, a second through slot; 11b, a third tightening screw; 11c, a second stop pin; 11d, a second boss; 12. a first bushing; 13. a second bushing; 14. a second adjusting screw; 15. a second spring; 16. a first adjusting screw; 17. a second pin; 18. a screw; 19. a hexagonal nut; 20. a flat gasket; 21. a hexagon socket head cap screw; 22. a cylindrical pin; 23. a rivet; 24. a first dial gauge; 25. a second dial gauge; 26. a first pin; 27. a first spring; 28. a second topsheet; 28a, a second screw; 28b, fourth tightening screw; 100. a low pressure turbine baffle; 101. a comb tooth; 102. an upper tooth surface; 103. a lower tooth surface; 104. tooth tips; 105. and (5) countersinking.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 2 to 15, a specific embodiment of a measuring tool for coating thickness of tooth surface of a comb tooth provided by the present invention includes a beam assembly 1, and a first measuring assembly is disposed at a left end of the beam assembly 1 for detecting a coating thickness of an upper tooth surface 102 of a low pressure turbine baffle 100; a second measuring assembly is arranged at the right end of the beam assembly 1 for detecting the coating thickness of the lower tooth surface 103 of the low-pressure turbine baffle 100; a locating feature is provided on the cross beam assembly 1 for insertion into a counterbore 105 of the low pressure turbine baffle 100 for locating.
As shown in connection with fig. 2, the first measuring assembly comprises a first lever 6 and a first dial gauge 24; the first lever 6 can rotate around a first pin shaft 26 in the middle of the first lever 6, the right end of the first lever 6 is a measuring end, and the top surface of the left end is contacted with the measuring head of the first dial indicator 24; the second measuring assembly comprises a second lever 10 and a second dial indicator 25, the second lever 10 can rotate around a second pin shaft 17 in the middle of the second lever, the left end of the second lever 10 is a measuring end, and the top surface of the right end is contacted with a measuring head of the second dial indicator 25.
With the above structure, the whole measuring tool is positioned on the part by utilizing the positioning piece on the beam assembly 1 to be matched with the counter bore 105 of the low-pressure turbine baffle 100. The thickness of the coating is measured by contrast, specifically, before the coating, the upper tooth surface 102 of the low pressure turbine baffle 100 is first measured by the first measuring assembly at the left end of the measuring tool and the indication of the first dial indicator 24 is recorded, and the lower tooth surface 103 of the low pressure turbine baffle 100 is measured by the second measuring assembly at the right end of the measuring tool and the indication of the second dial indicator 25 is recorded. Similarly, after spraying, the first measuring component at the left end is used for detecting the upper tooth surface 102 of the low-pressure turbine baffle 100 and recording the indication number of the first dial indicator 24, the second measuring component at the right end is used for detecting the lower tooth surface 103 of the low-pressure turbine baffle 100 and recording the indication number of the second dial indicator 25, and the coating thicknesses of the upper tooth surface 102 and the lower tooth surface 103 can be respectively reflected through the difference between the indication values before and after spraying.
Referring to fig. 2 and 3, the beam assembly 1 includes a beam 1a, a first support 3a disposed at the left end of the beam 1a, and a second support 3b disposed at the right end of the beam 1 a; the first support block 3a and the second support block 3b are fixedly connected with the cross rod 1a through cylindrical pins 22 and rivets 23.
Because whole beam assembly 1 length is longer, in order to make things convenient for processing and conveniently connect the first measurement subassembly, the second measurement subassembly at both ends, consequently beam assembly 1 adopts horizontal pole 1a and first branch piece 3a, the split type structure of second branch piece 3b, and horizontal pole 1a adopts hollow square steel construction, and the convenience of material collection. The first and second support blocks 3a and 3b are provided for connection with the first and second measuring assemblies, respectively, and for mounting the positioning assembly. In this embodiment, the positioning element comprises two first legs 2 and two second legs 8; the two first support legs 2 are respectively arranged on the ear plates at the front side and the rear side of the first support block 3 a; two second support legs 8 are respectively arranged on the ear plates on the front side and the rear side of the second support block 3 b. The lower end surfaces of the two first support legs 2 and the two second support legs 8 are positioned on the same plane and are used for being supported on the horizontal table surface of the counter bore 105 of the low-pressure turbine baffle 100; during positioning, the outer cylindrical surfaces of the two first support legs 2 are arranged as positioning surfaces for abutting against the inner wall of the counter bore 105, and the outer cylindrical surfaces of the two second support legs 8 are arranged at intervals with the inner wall of the counter bore 105.
In the positioning, the two first legs 2 and the two second legs 8 are inserted into the counter bore 105 of the low pressure turbine baffle 100, and the lower end surfaces of the two first legs 2 and the two second legs 8 abut against the horizontal table surface of the counter bore 105. Because the two first support legs 2 are arranged at intervals and symmetrically distributed on two sides of the longitudinal center symmetry plane of the beam assembly 1, when the beam assembly is positioned, only the outer column surfaces of the two first support legs 2 are required to be abutted against the inner wall of the counter bore 105. To prevent over-positioning, the outer cylindrical surfaces of the two second legs 8 are spaced from the inner wall of the counterbore 105.
Referring to fig. 2 to 6 and fig. 10 to 12, the first measuring assembly further includes a first guide block 4 and a first gauge stand 5, wherein the right end of the first guide block 4 is configured as a horizontal arm and is fixedly connected with the beam assembly 1, and specifically, the horizontal arm is fixedly connected with the first supporting block 3a through a hexagon socket head cap screw 21 and a positioning pin. An inclined first rectangular hole 4a is arranged at the left end of the first guide block 4, and the included angle between the axis of the first rectangular hole 4a and the horizontal direction is equal to the included angle between the upper tooth surface 102 of the low-pressure turbine baffle 100 and the horizontal direction is alpha; the first meter frame 5 is inserted into the first rectangular hole 4 a; a first through groove 5a is formed in the lower end of the first meter frame 5, the first lever 6 is installed in the first through groove 5a, and two ends of the first pin shaft 26 are rotatably inserted into front and rear side walls of the first through groove 5 a; the measuring head of the first dial indicator 24 is inserted into the hole body at the left part of the first dial indicator frame 5, and a first bushing 12 is arranged between the measuring head of the first dial indicator 24 and the mounting hole body of the first dial indicator frame 5. The first dial indicator 24 is tightly propped by a first propping screw 5b screwed on the left end surface of the first dial indicator frame 5; a first spring 27 is provided in the first bezel 5, the first spring 27 being in a compressed state, and the lower end of the first spring 27 being located on the right side of the first pin 26, the lower end being abutted against the top surface of the measuring end of the first lever 6. Since the inclination angle of the first rectangular hole 4a is equal to α, when the first lever 6 is in the initial state, the inclination angle of the first lever 6 can be made equal to α as long as the upper end surface or the lower end surface of the first lever 6 is parallel to the top surface of the first bezel 5. In addition, by providing the first spring 27, when the detection is performed, the elastic force of the first spring 27 always acts on the first lever 6, so that the first lever 6 has a tendency to rotate clockwise around the first pin 26, and therefore, the right end of the first lever 6 (i.e., the measuring end of the first lever 6) can always be attached to the upper tooth surface 102 of the low-pressure turbine baffle 100, and the measurement stability is improved.
Further, the first measuring assembly further comprises a first top sheet 7, and the first top sheet 7 is positioned between the lower end surface of the first table frame 5 and the bottom surface of the first rectangular hole 4 a; a stepped counter bore is formed in the bottom of the first rectangular hole 4a, a first screw 7a is installed on the bottom of the first rectangular hole, a stud end of the first screw 7a is connected with the first top sheet 7, and a gap exists between the top surface of a screw head of the first screw 7a and the stepped counter bore (as shown in fig. 4), so that the first top sheet 7 forms a floating structure; a second tightening screw 7b is screwed on the bottom wall of the first rectangular hole 4a for tightening the first top sheet 7, thereby pushing the first bezel 5 to be tightened against the top surface of the first rectangular hole 4 a.
As shown in fig. 2 and 12, a first stop pin 5c is inserted on the first watch frame 5, the first stop pin 5c is located at the left side of the first pin shaft 26, and the lower end of the first stop pin 5c is used for abutting against the top surface of the left end of the first lever 6; the purpose of the first stopper pin 5c is to adjust the initial position of the first lever 6, since the elastic force of the first spring 27 always pushes the first lever 6 downward so that the first lever 6 has a tendency to rotate clockwise, and by adjusting the insertion depth of the first stopper pin 5c, the inclination angle of the first lever 6 can be adjusted.
Further, as shown in fig. 4 and 5, in order to avoid interference between the top end of the first stop pin 5c and the top surface of the first rectangular hole 4a, a first relief groove 4b is provided on the top surface of the first rectangular hole 4 a; the top end of the first stop pin 5c is located in the first yielding groove 4b, and the first yielding groove 4b forms a yielding function.
In addition, as shown in fig. 12, in order to adjust the force of the first spring 27, the first adjusting screw 16 is provided on the first bezel 5, and the compression amount of the first spring 27 is adjusted by rotating the screw depth of the first adjusting screw 16, thereby adjusting the force of the first spring 27.
As shown in fig. 4, 10 and 1, a first boss 5d is integrally formed on the front and rear sides of the left end of the first bezel 5, and a stepped surface of the first boss 5d abuts against the left end surface a of the first guide block 4. The first boss 5d can form a limiting effect to limit the depth of the first meter frame 5 inserted into the first rectangular hole 4a, so that the purpose of controlling the measuring end position of the first lever 6 is achieved.
As shown in fig. 2, 7-9, and 13-15, the second measuring assembly further includes a second guide block 9 and a second gauge stand 11, where the left end of the second guide block 9 is configured as a horizontal arm and is fixedly connected with the beam assembly 1, and specifically, the horizontal arm is fixedly connected with the second supporting block 3b through a hexagon socket head cap screw 21 and a positioning pin. An inclined second rectangular hole 9a is arranged at the right end of the second guide block 9, and the included angle between the axis of the second rectangular hole 9a and the horizontal direction is equal to the included angle between the lower tooth surface 103 of the low-pressure turbine baffle 100 and the horizontal direction is beta; the second meter frame 11 is inserted into the second rectangular hole 9 a; a second through groove 11a is formed in the lower end of the second watch frame 11, the second lever 10 is installed in the second through groove 11a, and two ends of the second pin shaft 17 are rotatably inserted into front and rear side walls of the second through groove 11 a; the measuring head of the second dial indicator 25 is inserted into the hole body at the left part of the right part of the second dial indicator frame 11, and a second bushing 13 is arranged between the measuring head of the second dial indicator 25 and the mounting hole body of the second dial indicator frame 11. The second dial indicator 25 is tightly propped by a third propping screw 11b screwed on the right end surface of the second indicator frame 11; a second spring 15 is provided in the second bezel 11, the second spring 15 being in a compressed state, and the second spring 15 being located on the right side of the second pin 17, the lower end thereof abutting against the top surface of the right end of the second lever 10. Since the inclination angle of the second rectangular hole 9a is equal to β, when the second lever 20 is in the initial state, the inclination angle of the second lever 10 is also equal to β as long as the upper end surface or the lower end surface of the second lever 10 is parallel to the top surface of the second bezel 11. In addition, by providing the second spring 15, during detection, the elastic force of the second spring 15 always acts on the second lever 10, so that the second lever 10 has a tendency to rotate clockwise around the second pin 17, and therefore, the left end of the second lever 10 (i.e. the measuring end of the second lever 10) can always be attached to the lower tooth surface 103 of the low-pressure turbine baffle 100, and the stability of measurement is improved.
Further, the second measuring assembly further comprises a second top sheet 28, and the second top sheet 28 is positioned between the lower end surface of the second table frame 11 and the bottom surface of the second rectangular hole 9 a; a stepped counter bore is formed in the bottom of the second rectangular hole 9a, a second screw 28a is installed on the bottom of the second rectangular hole, a stud end of the second screw 28a is connected with the second top sheet 28, and a gap exists between the top surface of a screw head of the second screw 28a and the stepped counter bore (as shown in fig. 7), so that the second top sheet 28 forms a floating structure; a fourth tightening screw 28b is screwed on the bottom wall of the second rectangular hole 9a for tightening the second top sheet 28, thereby pushing the second bezel 11 against the top surface of the second rectangular hole 9 a.
As shown in fig. 2 and 15, a second stop pin 11c is inserted into the second bezel 11, the second stop pin 11c is located at the left side of the second pin 17, and the lower end of the second stop pin 11c is used to abut against the top surface of the left end of the second lever 10. The second stopper pin 11c is provided for the purpose of adjusting the initial position of the second lever 10, so that the second lever 10 has a tendency to rotate clockwise due to the elastic force of the second spring 15 always pushing the second lever 10 downward, and the inclination angle of the second lever 10 can be adjusted by adjusting the insertion depth of the second stopper pin 11 c.
Further, as shown in fig. 7 and 8, in order to avoid interference between the top end of the second stop pin 11c and the top surface of the second rectangular hole 9a, a second relief groove 9b is provided on the top surface of the second rectangular hole 9 a; the top end of the second stop pin 11c is located in the second yielding groove 9b, and the second yielding groove 9b forms a yielding function.
In addition, as shown in fig. 15, in order to adjust the force of the second spring 15, a second adjusting screw 14 is provided on the second bezel 11, and the purpose of adjusting the compression amount of the second spring 15 is achieved by rotating the screwing depth of the second adjusting screw 14, thereby adjusting the force of the second spring 15.
As shown in fig. 7, 13 and 1, a second boss 11d is integrally formed on the front and rear sides of the right end of the second bezel 11, and a stepped surface of the second boss 11d abuts against the right end surface B of the second guide block 9. The second boss 11d can form a limiting function to limit the depth of the second gauge stand 11 inserted into the second rectangular hole 9a, so that the purpose of controlling the position of the measuring end of the second lever 10 is achieved.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The measuring tool for the coating thickness of the tooth surface of the comb tooth is characterized by comprising a beam assembly (1), wherein a first measuring assembly is arranged at the left end of the beam assembly (1) and used for detecting the coating thickness of the upper tooth surface (102) of the low-pressure turbine baffle plate (100); a second measuring component is arranged at the right end of the beam component (1) and is used for detecting the coating thickness of a lower tooth surface (103) of the low-pressure turbine baffle (100); a positioning piece is arranged on the beam assembly (1) and is used for being inserted into a counter bore (105) of the low-pressure turbine baffle plate (100) for positioning;
the first measuring assembly comprises a first lever (6) and a first dial indicator (24); the first lever (6) can rotate around a first pin shaft (26) in the middle of the first lever, the right end of the first lever (6) is a measuring end, and the top surface of the left end is contacted with a measuring head of the first dial indicator (24);
the second measuring assembly comprises a second lever (10) and a second dial indicator (25), the second lever (10) can rotate around a second pin shaft (17) in the middle of the second lever, the left end of the second lever (10) is a measuring end, and the top surface of the right end is in contact with a measuring head of the second dial indicator (25).
2. The measuring tool for the tooth surface coating thickness of the comb tooth according to claim 1, wherein the beam assembly (1) comprises a cross rod (1 a), a first supporting block (3 a) arranged at the left end of the cross rod (1 a) and a second supporting block (3 b) arranged at the right end of the cross rod (1 a); the first supporting block (3 a) and the second supporting block (3 b) are fixedly connected with the cross rod (1 a) through cylindrical pins (22) and rivets (23);
the positioning piece comprises two first support legs (2) and two second support legs (8); the two first support legs (2) are respectively arranged on the ear plates at the front side and the rear side of the first support block (3 a); two second support legs (8) are respectively arranged on the ear plates at the front side and the rear side of the second support block (3 b);
the lower end surfaces of the two first support legs (2) and the two second support legs (8) are positioned on the same plane and are used for being supported on the horizontal table surface of the counter bore (105) of the low-pressure turbine baffle plate (100); during positioning, the outer cylindrical surfaces of the two first support legs (2) are arranged as positioning surfaces and are used for abutting against the inner wall of the counter bore (105), and the outer cylindrical surfaces of the two second support legs (8) are arranged at intervals with the inner wall of the counter bore (105).
3. The measuring tool for the tooth surface coating thickness of the comb teeth according to claim 1, wherein the first measuring assembly further comprises a first guide block (4) and a first meter frame (5), and the right end of the first guide block (4) is arranged as a horizontal arm and is fixedly connected with the beam assembly (1); the left end of the first guide block (4) is provided with an inclined first rectangular hole (4 a), and the included angle between the axis of the first rectangular hole (4 a) and the horizontal direction is equal to the included angle between the upper tooth surface (102) of the low-pressure turbine baffle plate (100) and the horizontal direction is alpha; the first meter frame (5) is inserted into the first rectangular hole (4 a); a first through groove (5 a) is formed in the lower end of the first meter frame (5), the first lever (6) is arranged in the first through groove (5 a), and two ends of the first pin shaft (26) are rotatably inserted into the front side wall and the rear side wall of the first through groove (5 a); the measuring head of the first dial indicator (24) is inserted into a hole body at the left part of the first meter frame (5) and is tightly propped by a first propping screw (5 b) screwed on the left end surface of the first meter frame (5); a first spring (27) is arranged in the first meter frame (5), the first spring (27) is in a compressed state, the first spring (27) is positioned on the right side of the first pin shaft (26), and the lower end of the first spring (27) is abutted against the top surface of the measuring end of the first lever (6).
4. A measuring tool for the thickness of a tooth surface coating of a comb tooth according to claim 3, characterized in that the first measuring assembly further comprises a first top sheet (7), the first top sheet (7) being located between the lower end surface of the first frame (5) and the bottom surface of the first rectangular hole (4 a); a stepped counter bore is formed in the bottom of the first rectangular hole (4 a) and is provided with a first screw (7 a), the stud end of the first screw (7 a) is connected with the first top sheet (7), and a gap exists between the top surface of the screw head of the first screw (7 a) and the stepped counter bore, so that the first top sheet (7) forms a floating structure; a second jacking screw (7 b) is screwed on the bottom wall of the first rectangular hole (4 a) and used for jacking the first top piece (7), so that the first meter frame (5) is pushed to be abutted against the top surface of the first rectangular hole (4 a).
5. A measuring tool for the tooth surface coating thickness of a comb tooth according to claim 3, characterized in that a first stop pin (5 c) is inserted on the first meter frame (5), the first stop pin (5 c) is positioned at the left side of the first pin shaft (26), and the lower end of the first stop pin (5 c) is used for abutting against the top surface of the left end of the first lever (6); a first abdication groove (4 b) is arranged on the top surface of the first rectangular hole (4 a); the top end of the first stop pin (5 c) is positioned in the first abdication groove (4 b).
6. A measuring tool for the tooth surface coating thickness of a comb tooth according to claim 3, characterized in that a first boss (5 d) is integrally formed on the front and rear sides of the left end of the first frame (5), respectively, and the step surface of the first boss (5 d) is abutted against the left end surface a of the first guide block (4).
7. The measuring tool for the tooth surface coating thickness of the comb teeth according to claim 1, wherein the second measuring assembly further comprises a second guide block (9) and a second meter frame (11), and the left end of the second guide block (9) is arranged as a horizontal arm and is fixedly connected with the beam assembly (1); the right end of the second guide block (9) is provided with an inclined second rectangular hole (9 a), and the included angle between the axis of the second rectangular hole (9 a) and the horizontal direction is equal to the included angle between the lower tooth surface (103) in the low-pressure turbine baffle plate (100) and the horizontal direction is beta; the second meter frame (11) is inserted into the second rectangular hole (9 a); a second through groove (11 a) is formed in the lower end of the second meter frame (11), the second lever (10) is arranged in the second through groove (11 a), and two ends of the second pin shaft (17) are rotatably inserted into the front side wall and the rear side wall of the second through groove (11 a); the measuring head of the second dial indicator (25) is inserted into a hole body at the left part of the right part of the second meter frame (11) and is tightly propped by a third propping screw (11 b) screwed on the right end surface of the second meter frame (11); a second spring (15) is arranged in the second meter frame (11), the second spring (15) is in a compressed state, the second spring (15) is positioned on the right side of the second pin shaft (17), and the lower end of the second spring is abutted against the top surface of the right end of the second lever (10).
8. The measuring tool of the tooth surface coating thickness of the comb tooth according to claim 7, wherein the second measuring assembly further comprises a second top sheet (28), and the second top sheet (28) is positioned between the lower end surface of the second gauge stand (11) and the bottom surface of the second rectangular hole (9 a); a stepped counter bore is formed in the bottom of the second rectangular hole (9 a) and is provided with a second screw (28 a), the stud end of the second screw (28 a) is connected with the second top sheet (28), and a gap exists between the top surface of the screw head of the second screw (28 a) and the stepped counter bore, so that the second top sheet (28) forms a floating structure; a fourth tightening screw (28 b) is screwed on the bottom wall of the second rectangular hole (9 a) and used for tightening the second top piece (28), so that the second watch holder (11) is pushed to be tightly abutted on the top surface of the second rectangular hole (9 a).
9. The measuring tool for the tooth surface coating thickness of the comb teeth according to claim 7, wherein a second stop pin (11 c) is inserted on the second surface frame (11), the second stop pin (11 c) is positioned at the left side of the second pin shaft (17), and the lower end of the second stop pin (11 c) is used for abutting against the top surface of the left end of the second lever (10); a second abdicating groove (9 b) is arranged on the top surface of the second rectangular hole (9 a); the top end of the second stop pin (11 c) is positioned in the second abdication groove (9 b).
10. The measuring tool for the tooth surface coating thickness of the comb teeth according to claim 7, wherein a second boss (11 d) is integrally formed on the front side and the rear side of the right end of the second surface frame (11), and the step surface of the second boss (11 d) is abutted against the right end surface B of the second guide block (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311408802.1A CN117419627A (en) | 2023-10-27 | 2023-10-27 | Measuring tool for tooth surface coating thickness of comb tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311408802.1A CN117419627A (en) | 2023-10-27 | 2023-10-27 | Measuring tool for tooth surface coating thickness of comb tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117419627A true CN117419627A (en) | 2024-01-19 |
Family
ID=89532161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311408802.1A Pending CN117419627A (en) | 2023-10-27 | 2023-10-27 | Measuring tool for tooth surface coating thickness of comb tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117419627A (en) |
-
2023
- 2023-10-27 CN CN202311408802.1A patent/CN117419627A/en active Pending
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