CN118149673A - Measuring tool and measuring method for detecting distance from inner hole to end face - Google Patents
Measuring tool and measuring method for detecting distance from inner hole to end face Download PDFInfo
- Publication number
- CN118149673A CN118149673A CN202410452782.6A CN202410452782A CN118149673A CN 118149673 A CN118149673 A CN 118149673A CN 202410452782 A CN202410452782 A CN 202410452782A CN 118149673 A CN118149673 A CN 118149673A
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- 238000000034 method Methods 0.000 title abstract description 8
- 238000013459 approach Methods 0.000 claims abstract description 3
- 230000004323 axial length Effects 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a measuring tool and a measuring method for detecting the distance from an inner hole to an end face, wherein a reference seat is set to be a horizontal part and a vertical part, the lower end of the horizontal part can be attached to the upper end face of a workpiece to be measured, the lower end face of the horizontal part can be used as the reference face when the workpiece to be measured is measured, a measuring rod on the vertical part is matched with the inner hole of the workpiece to be measured through a through hole on the vertical part to form a measuring reference in the horizontal direction, the measuring rod is moved to approach the inner hole of the workpiece to be measured under the constraint of the horizontal reference face and the measuring rod, if the measuring rod can extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is qualified, if the measuring rod can not extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is unqualified, the device does not need to be matched by a plurality of tools, and subsequent data calculation is not needed, the current workpiece hole distance is qualified after one measurement, the measuring precision is high, the measuring efficiency is high, and the measuring cost is reduced.
Description
Technical Field
The invention belongs to the technical field of workpiece hole pitch measurement, and relates to a measuring tool and a measuring method for detecting the distance from an inner hole to an end face.
Background
In the processing of aeroengine parts, the situation that whether the distance between a hole and an end face is qualified or not is often met, and a universal measuring tool (vernier caliper and the like) or a go-no-go gauge mode is generally adopted for detection.
Detecting by adopting a universal measuring tool such as a vernier caliper and the like, firstly measuring the aperture, then measuring the distance between the aperture wall and the plane, converting the two results to obtain a result, comparing the result with the requirement, and judging whether the result is qualified or not; by adopting the go-no-go gauge mode, whether the measurement is qualified or not can be judged by adopting two sets of measuring tools, and the measurement method has certain measurement errors, low measurement accuracy, complicated measurement process, low measurement efficiency and high cost.
Disclosure of Invention
The invention aims to solve the problems of low accuracy and low efficiency of measurement caused by a certain measurement error in the complicated measurement process when the hole pitch of a workpiece is measured in the prior art, and provides a measuring tool and a measuring method for detecting the distance from an inner hole to an end face.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
The measuring tool for detecting the distance from the inner hole to the end face comprises a reference seat, wherein the reference seat comprises a horizontal part and a vertical part;
The lower end of the horizontal part can be attached to the upper end surface of the workpiece to be tested;
The vertical part is provided with a through hole, a measuring rod is arranged in the through hole, and the end part of the measuring rod, which is far away from the reference seat, can extend into an inner hole of a workpiece to be measured.
The invention further improves that:
the measuring rod is in a cylindrical pin structure.
The measuring rod comprises a first cylinder and a second cylinder which are axially connected in sequence;
the first cylinder is used for being matched with an inner hole of a workpiece to be measured, and the second cylinder is used for being matched with a through hole of the reference seat.
The diameter of the first cylinder is larger than that of the second cylinder.
The second cylinder is in transition fit with the through hole.
The axial length of the second cylinder is smaller than the thickness of the vertical part.
The ends of the first cylinder and the second cylinder are provided with chamfers.
The surface roughness value Ra of the reference seat is smaller than or equal to 0.8um.
The horizontal part and the vertical part are both rectangular structures.
A measurement method for measuring a bore-to-end face distance, comprising the steps of:
attaching the lower end surface of the horizontal part of the reference seat to the upper end surface of the workpiece to be tested;
extending a portion of the structure of the measuring rod into the through hole;
horizontally moving the reference seat to enable the end part of the measuring rod far away from the through hole to be gradually close to the inner hole of the workpiece to be measured;
When the end part of the measuring rod, which is close to the workpiece to be measured, can extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is qualified;
When the end part of the measuring rod, which is close to the workpiece to be measured, can not extend into the inner hole of the workpiece to be measured, the hole pitch of the workpiece to be measured is unqualified.
Compared with the prior art, the invention has the following beneficial effects:
The invention discloses a measuring tool for detecting the distance from an inner hole to an end face, wherein a reference seat is set to be a horizontal part and a vertical part, the lower end of the horizontal part can be attached to the upper end face of a workpiece to be measured, the lower end face of the horizontal part can be used as the reference face when the workpiece to be measured is measured, a measuring rod on the vertical part is matched with the inner hole of the workpiece to be measured through a through hole on the vertical part to form a horizontal measuring reference, the measuring rod is moved to approach the inner hole of the workpiece to be measured under the constraint of the horizontal reference face and the measuring rod, if the measuring rod can extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is qualified, if the measuring rod can not extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is unqualified, the device does not need to be matched by a plurality of tools, and subsequent data calculation is not needed, the hole distance of the current workpiece can be judged if the hole distance of the workpiece is qualified after one measurement, the measuring precision is high, and the measuring cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a workpiece to be inspected;
FIG. 2 is a block diagram of a workpiece to be inspected;
FIG. 3 is a block diagram of a reference base of the present invention;
FIG. 4 is a block diagram of a stylus of the present invention;
FIG. 5 is a schematic diagram of the whole measuring tool structure of the present invention;
FIG. 6 is a schematic view of the present invention in use.
Wherein: 1-a reference seat; 2-measuring rod;
1 a-horizontal part; 1 b-a vertical part; 1 c-a through hole; 1a 1-measuring a reference plane; 1b 1-vertical portion inner side wall; 2 a-a first cylinder; 2 b-a second cylinder;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected 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: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, the embodiment of the invention discloses a measuring tool for detecting the distance from an inner hole to an end surface, which can be used for rapidly detecting the hole distance of a workpiece to be detected through the cooperation of a reference seat 1 and a measuring rod, and has the advantages of high detection efficiency and low measurement cost.
The structure specifically comprises the following steps:
The embodiment discloses a measuring tool for detecting the distance from an inner hole to an end face, which comprises a reference seat 1, wherein the reference seat 1 comprises a horizontal part and a vertical part; the lower end of the horizontal part can be attached to the upper end surface of the workpiece to be tested; the vertical part is provided with a through hole 1c, a measuring rod 2 is arranged in the through hole, and the end part of the measuring rod 2 far away from the reference seat 1 can extend into an inner hole of a workpiece to be measured.
Referring to fig. 1 to 2, in this embodiment, it is required to determine whether the distance L (57.15±0.1) between the inner hole and the end face of the workpiece is acceptable.
Referring to fig. 3, further, in the present embodiment, the structure of the reference base 1 is an inverted L-shaped structure, the reference base 1 is similar to a square structure, specifically, the horizontal portion and the vertical portion of the reference base 1 are both rectangular structures, and the horizontal portion 1a and the vertical portion 1b are perpendicular to each other.
The lower end surface of the horizontal portion 1a is a measurement reference surface 1a1, and the surface roughness value Ra is required to be not more than 0.8um.
The inner side wall of the vertical part is 1b1, a through hole 1c is formed in the vertical part 1b, and the distance between the center of the through hole 1c and the measuring reference surface 1a1 of the horizontal part 1a is L ', wherein the theoretical value of L' is equal to the theoretical value of L57.15.
Further, in the present embodiment, the structures of the horizontal portion 1a and the vertical portion 1b are not limited as long as the measurement requirements can be satisfied.
Referring to fig. 4, further, in this embodiment, the measuring rod 2 is configured as a cylindrical pin, and includes a first cylinder 2a and a second cylinder 2b that are axially connected in sequence, where the diameter of the first cylinder 2a is greater than the diameter of the second cylinder 2 b.
During detection, the second cylinder 2b is in transition fit with the through hole 1c, and the tolerance between the second cylinder 2b and the through hole 1c meets H7/m6.
Further, the axial length of the second cylinder 2b is smaller than the thickness of the vertical portion 1 b.
Further, the ends of the first cylinder 2a and the second cylinder 2b are provided with chamfers, so that the assembly and the test are convenient.
Further, the diameter of the first cylinder 2a is determined by a tolerance of Φ2amin=minimum value of the workpiece aperture-workpiece distance value (Φ2amin= 18.257-0.2= 18.057 mm), that is, a tolerance in which a difference between the minimum value of the outer diameter of the large circle 2a of the spindle 2 and the minimum value of the inner diameter of the workpiece aperture is equal to the workpiece distance value L; when Φ2a < Φ2amin, corresponding to the tolerance of the workpiece distance L being enlarged, the unqualified part is judged as the qualified part, therefore Φ2amin is set as the wear limit of the large circle 2a, and if the diameter of the large circle 2a is smaller than the size, the measuring tool is scrapped.
Referring to fig. 5, when the measuring staff 2 is assembled to the reference seat 1, it should be ensured that the distance between the center line of the measuring staff 2 and the measuring reference surface 1a1 of the reference seat 1 (i.e., the measuring tool distance) is L'.
In order to ensure the measurement accuracy, comprehensively considering the manufacturing economy, reducing the tolerance bandwidth occupied by the measuring tool, avoiding the principle of judging qualified parts as unqualified, and controlling the measuring tool accuracy generally according to 1/5-1/10 of the measured dimensional accuracy; according to the principle, the precision of the measuring tool is controlled within the range of (0.2 mm/5=0.04 mm) to (0.2 mm/10=0.02 mm).
Considering the processing difficulty comprehensively, the diameter of the first cylinder 2a of the measuring rod 2 and the tolerance of the measuring tool distance L 'are controlled according to IT 4-IT 6, so that the tolerance of phi 2a is less than 0.01mm, and the tolerance of L' is controlled within the range of (-0.005 to-0.008) mm to (+0.005 to +0.008) mm.
Referring to fig. 6, the embodiment also discloses a measuring method for measuring the distance from the inner hole to the end face, which comprises the following steps:
Attaching the lower end surface of the horizontal part of the reference seat 1 to the upper end surface of the workpiece to be tested;
Extending a part of the structure of the measuring staff 2 into the through hole 1 c;
the reference seat 1 is horizontally moved, so that the end part of the measuring rod 2, which is close to the workpiece to be measured, is gradually close to the inner hole of the workpiece to be measured;
when the end part of the measuring rod 2, which is close to the workpiece to be measured, can extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is qualified;
When the end part of the measuring rod 2, which is close to the workpiece to be measured, can not extend into the inner hole of the workpiece to be measured, the hole pitch of the workpiece to be measured is unqualified.
Specifically, when the measuring rod 2 is blocked to the upper side (near the end face side of the workpiece) of the inner hole of the workpiece to be measured, the hole distance is larger than the requirement;
when the measuring rod 2 is blocked to the lower side (the side far away from the end face of the workpiece) of the inner hole of the workpiece to be measured, the hole distance is smaller than the requirement.
The detection tool and the detection method disclosed by the embodiment can be used for rapidly detecting the qualification condition of the hole pitch, and judging whether the hole pitch is qualified or not only by one set of detection tool and one measurement, and the detection tool and the detection method are simple in structure, convenient to operate, free of external tools and data calculation in the later period, high in detection accuracy, and capable of improving the detection efficiency and reducing the cost.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A measuring tool for detecting the distance from an inner hole to an end surface, characterized by comprising a reference seat (1), wherein the reference seat (1) comprises a horizontal part and a vertical part;
The lower end of the horizontal part can be attached to the upper end surface of the workpiece to be tested;
the vertical part is provided with a through hole (1 c), a measuring rod (2) is arranged in the through hole (1 c), and the end part of the measuring rod (2) far away from the reference seat (1) can extend into an inner hole of a workpiece to be measured.
2. A gauge for detecting the distance from an inner bore to an end face according to claim 1, characterized in that the measuring rod (2) is structured as a cylindrical pin.
3. A gauge for detecting the distance from an inner hole to an end face according to claim 2, characterized in that the measuring rod (2) comprises a first cylinder (2 a) and a second cylinder (2 b) connected in axial sequence;
the first cylinder (2 a) is used for being matched with an inner hole of a workpiece to be detected, and the second cylinder (2 b) is used for being matched with a through hole (1 c) of the reference seat (1).
4. A gauge for detecting the distance of an inner bore from an end face according to claim 3, characterized in that the diameter of the first cylinder (2 a) is larger than the diameter of the second cylinder (2 b).
5. A gauge for detecting a bore-to-end distance according to claim 4, characterized in that the second cylinder (2 b) is in transition fit with the through hole (1 c).
6. A gauge for detecting the distance of an inner bore from an end face according to claim 4, characterized in that the axial length of the second cylinder (2 b) is smaller than the thickness of the vertical portion.
7. A gauge for detecting the distance from an inner bore to an end face according to claim 3, characterized in that the ends of the first cylinder (2 a) and the second cylinder (2 b) are each provided with a chamfer.
8. A gauge for detecting a hole-to-end face distance according to claim 1, wherein the surface roughness value Ra of the reference seat (1) is 0.8um or less.
9. The gauge for detecting the distance from an inner bore to an end face of claim 1, wherein the horizontal portion and the vertical portion are each rectangular in configuration.
10. A measurement method for measuring the distance from an inner bore to an end face, comprising the steps of:
attaching the lower end surface of the horizontal part of the reference seat (1) to the upper end surface of the workpiece to be tested;
A part of the structure of the measuring rod (2) is extended into the through hole (1 c);
Horizontally moving the reference seat (1) to gradually approach the end part of the measuring rod (2) far away from the through hole (1 c) to the inner hole of the workpiece to be measured;
When the end part of the measuring rod (2) close to the workpiece to be measured can extend into the inner hole of the workpiece to be measured, the hole distance of the workpiece to be measured is qualified;
when the end part of the measuring rod (2) close to the workpiece to be measured can not extend into the inner hole of the workpiece to be measured, the hole pitch of the workpiece to be measured is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410452782.6A CN118149673A (en) | 2024-04-16 | 2024-04-16 | Measuring tool and measuring method for detecting distance from inner hole to end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410452782.6A CN118149673A (en) | 2024-04-16 | 2024-04-16 | Measuring tool and measuring method for detecting distance from inner hole to end face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118149673A true CN118149673A (en) | 2024-06-07 |
Family
ID=91296921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410452782.6A Pending CN118149673A (en) | 2024-04-16 | 2024-04-16 | Measuring tool and measuring method for detecting distance from inner hole to end face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118149673A (en) |
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2024
- 2024-04-16 CN CN202410452782.6A patent/CN118149673A/en active Pending
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