CN113188417A - Go-no go gauge for compressor dovetail type mortise contour inspection and inspection method - Google Patents
Go-no go gauge for compressor dovetail type mortise contour inspection and inspection method Download PDFInfo
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- CN113188417A CN113188417A CN202110368101.4A CN202110368101A CN113188417A CN 113188417 A CN113188417 A CN 113188417A CN 202110368101 A CN202110368101 A CN 202110368101A CN 113188417 A CN113188417 A CN 113188417A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
Abstract
The embodiment of the application provides a go-no go gauge for checking dovetail-shaped mortise profiles of a gas compressor and a checking method, and belongs to the technical field of mortise detection, wherein the go-no go gauge comprises a head and a handle, and the head is of a thin-sheet structure with the shape profile consistent with the contour of the mortise; the handle is of a cylindrical structure and is fixedly connected with the middle part below the head, and the central axis of the cylinder is vertical to the long axis of the sheet; the cross section of the structure formed by the head and the handle along the long axis direction of the head is a T-shaped structure; the width of the cross section of the head in the short axis direction is smaller than the height, and the diameter of the handle is smaller than the width of the cross section of the head in the short axis direction. Through the processing scheme of this application, use inspection convenient and fast, improved the tongue-and-groove inspection precision, improved production efficiency.
Description
Technical Field
The application relates to the technical field of mortise detection, in particular to a go-no go gauge and a go-no go method for detecting dovetail type mortise contour of a gas compressor.
Background
Dovetail tenons and mortises are the most common blade connection structures in compressors. The processing size of the tenon and the mortise can influence the assembly clearance between the blade and the wheel disc and the casing, and the clearance directly influences the vibration quantity of the aero-engine during working, so that the accurate measurement of the matching size of the tenon and the mortise is very necessary.
In the actual processing process, the dovetail tenon of the blade is a convex surface, the size can be measured by adopting a three-coordinate measuring instrument (hereinafter referred to as three-coordinate measuring instrument for short), the size of the blade is small and the number of the blade is large, one blade is usually selected as a trial tool piece in the processing process, and the rest blades are produced in batches after the size is qualified, so the size of the dovetail tenon is easy to control. The casing and the wheel disc are large pieces, and test tools cannot be manufactured generally. Dovetail mortises on the casing and the wheel disc are concave surfaces, are mostly of a circumferential whole ring structure, and cannot be measured by using three coordinates. In addition, because the aircraft engine casing and the wheel disc are large in size, mostly have thin-wall structures and are easy to deform, the size inspection is finished on a machine tool after the aircraft engine casing and the wheel disc are required to be processed, and the aircraft engine casing and the wheel disc are disassembled after the aircraft engine casing and the wheel disc are qualified.
The conventional method for measuring the mortise is to fill sample paste in the machined dovetail-shaped mortise, take the sample paste out of the mortise after the sample paste is solidified, then slice the sample paste, place the slice in projection equipment, amplify a certain multiple, display the outline of the slice, and measure the outline size of the slice as the size of the mortise. The scheme can roughly verify whether the processed mortise is qualified or not, but the precision is insufficient, and the error is mainly from the following sources: the sample paste is not completely filled in the mortise, and the sample paste has a small outline or is lost; the sample paste is not completely solidified, and the sample paste is deformed when being taken out; when the sample paste is sliced, the direction is not normal, and the section is not the cross section of the mortise.
Disclosure of Invention
In view of the above, embodiments of the present application provide a go-no-go gauge for checking a dovetail-shaped mortise profile of a compressor and a checking method, which at least partially solve the problems in the prior art.
In a first aspect, the embodiment of the application provides a go-no-go gauge for checking the profile of a dovetail-shaped mortise of an air compressor, which comprises a head part and a handle, wherein,
the head is arranged into a sheet structure with the contour consistent with the contour of the mortise;
the handle is of a cylindrical structure and is fixedly connected with the middle part below the head, and the central axis of the cylinder is vertical to the long axis of the slice;
the cross section of the structure formed by the head and the handle along the long axis direction of the head is a T-shaped structure;
the width of the cross section of the head in the short axis direction is smaller than the height, and the diameter of the handle is smaller than the width of the cross section of the head in the short axis direction.
According to a specific implementation manner of the embodiment of the application, the head outline of the go gauge is consistent with the minimum outline of the mortise, the head outline of the no-go gauge is consistent with the maximum outline of the mortise, and the outline profile degrees of the go gauge and the no-go gauge are both 0.01-0.02 mm.
According to a specific implementation of the embodiment of the application, the width of the head in the short-axis direction cross section is half of the height.
According to a specific implementation of the embodiment of the present application, the head and the handle are connected by welding.
According to a specific implementation manner of the embodiment of the application, the head and the handle are welded in a laser welding mode.
According to a particular implementation of the embodiments of the present application, the lower surface of the handle is sandblasted or knurled.
According to a specific implementation manner of the embodiment of the application, the head and the handle are made of metal.
In a second aspect, an embodiment of the present application further provides a method for inspecting a dovetail-shaped mortise profile of an air compressor, including the following steps:
s1, removing cutting fluid and chips in the machined casing mortise on the machine tool;
s2, checking the mortise by using a go gauge:
s21, extending the head of the go gauge into the mortise at an angle of the contour of the head perpendicular to the contour of the mortise;
s22, rotating the drift gauge handle by 90 degrees to enable the head profile of the drift gauge to correspond to the tongue-and-groove profile;
s23, sliding the go gauge along the circumferential direction of the mortise, if the interference or the blockage situation does not exist, checking the go gauge to be qualified, and executing the step S3; otherwise, executing step S4;
s3, checking the mortise by using a no-go gauge:
detaching the casing from the machine tool, and checking the mortise by using a no-go gauge, wherein the checking method is the same as the through gauge checking method, and if the no-go gauge is blocked or cannot slide in the mortise, the no-go gauge is checked to be qualified;
and S4, adjusting the processing program and re-running the processing, or using the cutter to compensate, and repeating the step S2 after the processing is finished.
According to a concrete implementation mode of the embodiment of the application, for the mortise inspection of the multistage blade casing, after all the mortise go gauge inspection is qualified, the casing is split again, and the no-go gauge inspection is carried out.
According to a specific implementation manner of the embodiment of the present application, before step S1, the method further includes: checking whether the contour of the go-no go gauge is damaged or not by adopting a three-coordinate system, and if the contour of the go-no go gauge is not damaged, marking the two ends of the head of the go-no go gauge so as to enable the two ends of the head of the go-no go gauge to correspond to the two ends of the mortise one by one; and if the damage exists, a new go gauge or a new no-go gauge is processed again.
Advantageous effects
The embodiment of the application provides a go-no go gauge for checking the dovetail-shaped mortise profile of a gas compressor and a checking method, and the go-no go gauge for the mortise is simple in structure and convenient to use; the inspection precision of the mortises is effectively improved; the inspection of the mortise can be completed on the machine tool, the secondary clamping of the part in the working time is avoided, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a dovetail-shaped mortise contour according to an embodiment of the present invention;
FIG. 2 is a front view of a dovetail mortise go gauge according to one embodiment of the present invention;
FIG. 3 is a side view of a dovetail mortise go gauge according to one embodiment of the present invention;
FIG. 4 is a schematic inspection diagram of a compressor dovetail tongue-and-groove profile inspection method according to an embodiment of the invention;
FIG. 5 is another inspection schematic of a compressor dovetail keyway contour inspection method according to an embodiment of the invention.
In the figure: 0. a theoretical contour line of the mortise; 1. the maximum contour line of the mortise; 2. representing the minimum contour line of the mortise; 3. go gauge; 31. a head portion; 32. a handle; 4. a casing.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides a compressor dovetail-shaped mortise contour inspection go-no-go gauge used for inspecting whether the size of a mortise is qualified. The dovetail type mortise contour line is shown in fig. 1, the contour line 0 represents a theoretical contour line of the mortise, the contour line 1 represents a maximum contour line of the mortise, and the contour line 2 represents a minimum contour line of the mortise, and when the inspection is carried out, the size of the mortise can be considered to be qualified as long as the actual contour line of the mortise is between the maximum contour line 1 of the mortise and the minimum contour line 2 of the mortise.
The construction of the go gauge and the no-go gauge in this application will be described with reference to the go gauge shown in fig. 2-3. the go gauge 3 comprises a head 31 and a handle 32, wherein the head 31 is provided in a thin sheet structure with an outline conforming to the minimum profile 2 of the tongue and groove and an outline profile preferably ranging from 0.01 to 0.02 mm. The handle 32 is formed in a cylindrical structure, is fixedly connected to the lower middle portion of the head 31, and has a central axis perpendicular to a long axis of the sheet, as shown in a side view of the gauge 3 of fig. 3.
The connecting structure of the head 31 and the handle 32 has a T-shaped cross section along the long axis of the head 31.
The height of the cross section of the head 31 in the short axis direction is H, the width of the cross section of the head 31 in the short axis direction is smaller than the height H, and the diameter of the handle 32 is smaller than the width of the cross section of the head in the short axis direction.
More preferably, the width of the cross section of the head 31 in the short axis direction is half of the height H, i.e., 0.5H.
In a specific application, the head 31 of the go gauge 3 is used for extending into the mortise, and the outline of the head 31 is consistent with the minimum outline 2 of the mortise, so that if the head 31 of the go gauge 3 can extend into the mortise and the head 31 can slide smoothly when the handle 32 is rotated, the outline of the mortise is larger than that of the head 31 of the go gauge 3, and the go gauge 3 is detected to be passed. On the contrary, if the head 31 of the go gauge 3 cannot extend into the mortise to slide, the contour line of the mortise is smaller than the contour line of the head 31 of the go gauge 3, and at the moment, the mortise is in an under-machined state, and further machining is needed, so that the size of the mortise reaches the standard.
In one embodiment, the head 31 and the handle 32 are connected by welding, preferably laser welding, which can effectively control the welding deformation.
Further, the surface of the lower half portion of the handle 32 can be subjected to sand blasting or metal knurling to improve the roughness of the hand-held part and avoid the phenomenon that the hand slides in the use process to influence the measurement accuracy.
Further, the head 31 and the handle 32 are made of metal.
The structure of the no-go gauge is consistent with that of the go gauge, the no-go gauge is different from the go gauge only in the outline of the head, the outline of the head of the no-go gauge is consistent with the maximum outline of the mortise, and the outline of the no-go gauge is 0.01-0.02 mm. For the specific structure of the no-go gauge, the structure of the go-no gauge can be referred to, and the detailed description is omitted.
The following describes a method for inspecting the profile of a dovetail-shaped mortise of a compressor in an applied embodiment in detail by taking the dovetail-shaped mortise inspection on a casing as an example. At present, most of compressor casings of aero-engines and gas turbines adopt a split structure, namely, a circular casing is split into an upper half and a lower half from the positions of 0 degree and 180 degrees, and the upper half casing and the lower half casing are combined together for processing during mortise processing.
Before the go gauge 3 and the no-go gauge are used, the three-coordinate detection is adopted to detect the outline of the go gauge 3 and the no-go gauge, and whether the wear exists in the go gauge 3 or the no-go gauge is judged. If multiple uses result in wear of the profile, new go gauges 3 or no-go gauges need to be reworked. If the wear does not occur after the inspection or a new go gauge 3 or no-go gauge is processed, marking the two ends of the head of the go gauge 3 and the two ends of the head of the no-go gauge, and enabling the two ends of the head of the go gauge and the two ends of the mortise to correspond to each other one by one.
Specifically, one end of the head of the go gauge 3 or the no-go gauge may be labeled as "left", and the other end may be labeled as "right". The left end of the head corresponds to the left side of the mortise, and the right end of the head corresponds to the right side of the mortise. It should be understood that the marking is for distinguishing the two ends of the head of the go gauge or the no-go gauge, and the marking is not limited to the embodiment provided in the present application, and other marking manners may be used, based on that the marking may correspond to the two ends of the mortise one to one in use.
The method for performing the mortise inspection by using the go gauge 3 and the no-go gauge is described in detail below with reference to fig. 4-5, and specifically comprises the following steps:
and S1, removing the cutting fluid and the chips in the mortise of the machined case 4 on the machine tool.
In this embodiment, after the mortise machining is completed, the casing 4 is not detached from the machine tool for a while, and a high-pressure air gun is used to remove the cutting fluid and the metal chips in the mortise which has just been machined, and to remove impurities, so as to facilitate the testing of the go gauge 3 and the no-go gauge.
S2, using a general gauge 3 to check the mortise:
s21, the head 31 of the go gauge 3 extends into the mortise at an angle of the contour perpendicular to the contour of the mortise, and the specific position of the head 31 refers to the inspection schematic diagram shown in FIG. 4;
s22, rotating the handle 32 of the go gauge 3 by 90 degrees to enable the contour of the head 31 of the go gauge 3 to correspond to the contour of the mortise;
s23, sliding the go gauge 3 for a certain distance along the circumferential direction of the mortise, if the interference or the blockage situation does not exist, checking the go gauge 3 to be qualified, and executing the step S3; otherwise, step S4 is executed.
If the go gauge 3 is qualified, the mortise is not under-machined, otherwise, the mortise is under-machined, and step S4 is executed.
S3, checking the mortise by using a no-go gauge:
the casing 4 is detached from the machine tool, the tongue groove is checked by using the no-go gauge, the checking method is the same as the checking method using the go-no gauge 3, the details are not repeated, the checking can be performed by referring to the step S2, and if the sliding of the no-go gauge in the tongue groove is difficult or impossible, the no-go gauge is checked to be qualified.
And (4) checking that the go gauge 3 and the no-go gauge are qualified, and then, the actually processed mortise contour line is positioned between the mortise maximum contour line 1 and the mortise minimum contour line 2, so that the mortise processing size is considered to be qualified.
If the no-go gauge can slide in the mortise without resistance, the actually machined contour of the mortise is over-large, namely, the machined contour is over-machined, and at the moment, the machined dimension of the mortise is unqualified.
And S4, adjusting the processing program and re-running the processing, or using the cutter to compensate, and repeating the step S2 after the processing is finished.
If the mortise go-no-go gauge is not qualified, the actual contour of the mortise machining is relatively small, at the moment, the machining program is adjusted, or the cutter is compensated, and the machining program is operated again, so that the work of re-clamping and aligning the datum of the casing 4 is omitted. After the machining program is completed, the re-inspection is performed again from the standard inspection step of step S2.
Further, for the mortise inspection of the multistage blade casing 4, after all the mortise go-gauge inspection is qualified, the casing 4 is disassembled, and no-go gauge inspection is performed.
The embodiment provided by the invention aims at the problems of insufficient precision and large error when the processing of the mortise is qualified by using a sample paste filling method, and provides the go-no-go gauge for detecting the dovetail-shaped mortise profile of the compressor and the detection method, wherein the go-no-go gauge has a simple structure and is convenient to use; the mortise inspection precision is improved; repeated clamping of parts during detection can be avoided, and production efficiency is improved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A go-no go gauge for checking the profile of a dovetail-shaped mortise of an air compressor is characterized by comprising a head and a handle, wherein,
the head is arranged into a sheet structure with the contour consistent with the contour of the mortise;
the handle is of a cylindrical structure and is fixedly connected with the middle part below the head, and the central axis of the cylinder is vertical to the long axis of the slice;
the cross section of the structure formed by the head and the handle along the long axis direction of the head is a T-shaped structure;
the width of the cross section of the head in the short axis direction is smaller than the height, and the diameter of the handle is smaller than the width of the cross section of the head in the short axis direction.
2. The compressor dovetail-type mortise contour inspection go-no go gauge as claimed in claim 1, wherein the head contour of the go gauge is consistent with the minimum contour of the mortise, the head contour of the no go gauge is consistent with the maximum contour of the mortise, and the outer contour profile degrees of the go gauge and the no go gauge are both 0.01-0.02 mm.
3. The compressor dovetail-type tongue-and-groove contour inspection go-no-go gauge as claimed in claim 1, wherein the width of the cross section in the short axis direction of the head portion is half of the height.
4. The compressor dovetail-type mortise contour inspection go-no-go gauge according to claim 1, wherein the head portion and the handle are connected by welding.
5. The compressor dovetail-type mortise contour inspection go-no go gauge as claimed in claim 4, wherein the head and the handle are welded by laser welding.
6. The pass-stop gauge for checking the profile of a dovetail-shaped mortise of a compressor according to any one of claims 1 to 5, wherein the lower surface of the handle is subjected to sand blasting or knurling.
7. The pass-stop gauge for checking the profile of the dovetail-shaped mortise of the compressor as claimed in any one of claims 1 to 5, wherein the head and the handle are made of metal.
8. The inspection method for the dovetail-shaped mortise profile of the gas compressor is characterized by comprising the following steps of:
s1, removing cutting fluid and chips in the machined casing mortise on the machine tool;
s2, checking the mortise by using a go gauge:
s21, extending the head of the go gauge into the mortise at an angle of the contour of the head perpendicular to the contour of the mortise;
s22, rotating the drift gauge handle by 90 degrees to enable the head profile of the drift gauge to correspond to the tongue-and-groove profile;
s23, sliding the go gauge along the circumferential direction of the mortise, if the interference or the blockage situation does not exist, checking the go gauge to be qualified, and executing the step S3; otherwise, executing step S4;
s3, checking the mortise by using a no-go gauge:
detaching the casing from the machine tool, and checking the mortise by using a no-go gauge, wherein the checking method is the same as the through gauge checking method, and if the no-go gauge is blocked or cannot slide in the mortise, the no-go gauge is checked to be qualified;
and S4, adjusting the processing program and re-running the processing, or using the cutter to compensate, and repeating the step S2 after the processing is finished.
9. The method for inspecting dovetail-shaped mortise profile of compressor as claimed in claim 8, wherein for inspecting the mortise of multistage blade casing, after all the mortise go gauges are qualified, the casing is disassembled and the no-go gauge inspection is performed.
10. The method for inspecting a compressor dovetail-shaped groove profile according to claim 8, wherein the method further comprises, before step S1: checking whether the contour of the go-no go gauge is damaged or not by adopting a three-coordinate system, and if the contour of the go-no go gauge is not damaged, marking the two ends of the head of the go-no go gauge so as to enable the two ends of the head of the go-no go gauge to correspond to the two ends of the mortise one by one; and if the damage exists, a new go gauge or a new no-go gauge is processed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368101.4A CN113188417A (en) | 2021-04-06 | 2021-04-06 | Go-no go gauge for compressor dovetail type mortise contour inspection and inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368101.4A CN113188417A (en) | 2021-04-06 | 2021-04-06 | Go-no go gauge for compressor dovetail type mortise contour inspection and inspection method |
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| Publication Number | Publication Date |
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| CN113188417A true CN113188417A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110368101.4A Pending CN113188417A (en) | 2021-04-06 | 2021-04-06 | Go-no go gauge for compressor dovetail type mortise contour inspection and inspection method |
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| CN (1) | CN113188417A (en) |
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- 2021-04-06 CN CN202110368101.4A patent/CN113188417A/en active Pending
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