CN112304228B - Length measuring device applying grating technology - Google Patents
Length measuring device applying grating technology Download PDFInfo
- Publication number
- CN112304228B CN112304228B CN202011277321.8A CN202011277321A CN112304228B CN 112304228 B CN112304228 B CN 112304228B CN 202011277321 A CN202011277321 A CN 202011277321A CN 112304228 B CN112304228 B CN 112304228B
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- measuring
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- bottom plate
- plate
- flat plate
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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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
- G01B5/003—Measuring of motor parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a length measuring device applying a grating technology.A bottom plate is provided with double guide rails, a sliding block is arranged on the guide rails, and a grating ruler is arranged between the two guide rails; the stop pin is arranged on the bottom plate; the upper surface of the sliding block is provided with a connecting flat plate which is connected with a bracket; the lower bottom surface of the bracket is fixed with the connecting plate; ball head measuring pins are respectively arranged on two sides of the middle position of the connecting plate; one end of the connecting flat plate is provided with a handle a; the upper surface of the connecting flat plate is provided with a display screen; one end of the lower surface of the bottom plate is connected with a support, and a measuring pin is arranged on the support; the inner diameter positioning pin is arranged between the measuring pin and the ball head measuring pin and is fixed on the lower surface of the bottom plate; a groove is arranged on the connecting flat plate, the reading head is fixed in the groove, and a distance is reserved between the reading head and the grating ruler; handles b are arranged at the two ends of the bottom plate. The measuring device provided by the invention is considered to be a qualified product when the measured dimension is consistent with the actual numerical value of the standard component, and can be used for directly measuring the component, so that the trouble of comparing the component is eliminated.
Description
Technical Field
The invention relates to the technical field of measurement of aero-engine casings, in particular to a length measuring device applying a grating technology.
Background
The engine casings have various types, are characterized by large diameter and complex shape, and along with the continuous development of the engine technology, the precision requirement of engine parts is higher and higher, the traditional measuring tool cannot realize accurate measurement, and the three-coordinate measurement cannot meet the requirement of part batch production; the linkage ring of the engine case part has large diameter, thin wall and high required precision; the measuring tool is used for measuring in the machining process, comparison and measurement are needed, namely, zero alignment is carried out on a surface part firstly, then the measuring tool is used for measuring a part, the variation of a dial indicator of the measuring tool is observed, due to the fact that manufacturing errors exist on the surface part, the actual measurement value and the measured value of the surface part need to be converted by a worker in the detection process, calculation errors are easily caused, in addition, the system error of the driving measuring tool is large, the size is large, the weight is heavy, and the measuring precision is low.
Disclosure of Invention
In order to solve the technical problem, the invention provides a length measuring device applying a grating technology, which has the following specific technical scheme:
a length measuring device applying a grating technology comprises a bottom plate, a stop pin, a support, a connecting plate, a ball head measuring pin, an inner diameter positioning pin, a measuring pin, a support, a connecting flat plate, a guide rail, a grating ruler, a display screen and a reading head;
the upper surface of the bottom plate is provided with double guide rails, the sliding block is arranged on the guide rails, and a grating ruler is arranged in the middle between the two guide rails;
the stop pin is arranged at the front end of the guide rail on the upper surface of the bottom plate and is used for ensuring the terminal position of the sliding block on the guide rail;
the upper surface of the sliding block is provided with a connecting flat plate, and two sides of the connecting flat plate are both connected with the bracket;
the lower bottom surface of the bracket is fixed with the connecting plate through a screw;
ball head measuring pins are respectively arranged on two sides of the middle position of the connecting plate;
one end of the connecting flat plate is provided with a handle a for moving the ball head measuring pin during measurement;
the upper surface of the connecting flat plate is provided with a display screen, and the display screen is provided with a data line and is used for displaying the moving distance, namely the measured diameter size;
one end of the lower surface of the bottom plate is connected with a support, a measuring pin is arranged on the support, and the measuring pin is used for measuring the outer diameter;
the inner diameter positioning pin is arranged between the measuring pin and the ball head measuring pin and is fixed on the lower surface of the bottom plate;
the connecting flat plate is provided with a groove, the reading head is fixed in the groove through a screw, and a distance is reserved between the reading head and the grating ruler;
and handles b are arranged at two ends of the bottom plate and used for carrying the measuring device.
The preferable scheme of the length measuring device applying the grating technology is that the ball measuring pin and the measuring pin are arranged on the same straight line, and the inner diameter positioning pins are positioned on two sides of the central line of the ball measuring pin and the central line of the measuring pin.
The preferable scheme of the length measuring device applying the grating technology is that the distance between the grating ruler and the reading head is 0.8mm.
The preferable scheme of the length measuring device applying the grating technology is that the diameter of a linkage ring of an engine case part which can be measured by the device ranges from 300mm to 1200 mm.
The preferable scheme of the length measuring device applying the grating technology is that the distance between the top point A and the top point B of the two ball head measuring pins is required to be 50mm +/-0.01 mm.
The preferable scheme of the length measuring device applying the grating technology is that the flatness of the bottom surface of the bottom plate is required to be 0.04mm.
The preferable scheme of the length measuring device applying the grating technology is that the verticality of the end surface C of the measuring pin relative to the bottom surface of the bottom plate is required to be 0.01mm.
The invention has the beneficial effects that: the technical scheme of the invention is that the grating ruler technology is applied to the measurement of large-diameter parts, the ruler body of the grating ruler is positioned and installed on the bottom plate of the measuring device, and the reading head is installed on the support frame of the guide rails at the two sides and keeps a certain distance from the ruler body, so that the response sensitivity during reading is ensured; secondly, the universal structure for measuring the inner diameter and the outer diameter can ensure that the inner diameter and the outer diameter of the part are realized on one set of measuring device; in addition, the measuring device uses qualified standard parts in a part workshop to repeatedly detect different lengths for a plurality of times, and the parts can be directly measured when the measured sizes are consistent with the actual values of the standard parts, so that the trouble of comparing the parts is eliminated; the measuring device can be used for measuring the inner diameter and the outer diameter of all parts in the range, the measuring device forbids the design, manufacture and use of standard parts, the design cost is expected to be saved by more than 50%, the digital automatic storage measurement of the inner diameter and the outer diameter of high-precision large-diameter parts can be realized, the innovative structure is simple to operate, the measurement is accurate, one worker can complete the measurement of all measurement sizes of casing parts, and the expected production and manufacturing period can be shortened by more than 30%.
Drawings
FIG. 1 is a front view of a length measuring device using grating technology;
FIG. 2 is a top view of a length measuring device employing grating technology;
FIG. 3 isbase:Sub>A schematic view of the structure of FIG. 1A-A;
FIG. 4 is a schematic view of the structure of FIG. 1B-B.
In the figure: 1-a bottom plate; 2-a stop pin; 3-a scaffold; 4-connecting plates; 5-ball measuring pin; 6-handle a; 7-inner diameter positioning pin; 8-measuring pin; 9-a support; 10-a connection plate; 11-handle b; 12-a guide rail; 13-a grating ruler; 14-a display screen; 15-a reading head; 16-the engine case part.
Detailed Description
As shown in fig. 1-4, a length measuring device using a grating technology includes a bottom plate 1, a stop pin 2, a bracket 3, a connecting plate 4, a ball measuring pin 5, an inner diameter positioning pin 7, a measuring pin 8, a support 9, a connecting plate 10, a guide rail 12, a grating ruler 13, a display screen 14, and a reading head 15;
the upper surface of the bottom plate 1 is provided with double guide rails 12, the sliding block is arranged on the guide rails 12, and a grating ruler 13 is arranged in the middle between the two guide rails 12;
the stop pin 2 is arranged at the front end of the guide rail 12 on the upper surface of the bottom plate 1 and is used for ensuring the end point position of the sliding block on the guide rail 12;
the upper surface of the sliding block is provided with a connecting flat plate 10, and the two sides of the connecting flat plate 10 are both connected with the bracket 3;
the lower bottom surface of the bracket 3 is fixed with the connecting plate 4 through a screw;
ball head measuring pins 5 are respectively arranged on two sides of the middle position of the connecting plate 4;
one end of the connecting flat plate 10 is provided with a handle a6 for moving the ball head measuring pin 5 during measurement;
the upper surface of the connecting flat plate 10 is provided with a display screen 14, and the display screen 14 is provided with a data line for displaying the moving distance, namely the measured diameter size;
one end of the lower surface of the bottom plate 1 is connected with a support 9, a measuring pin 8 is arranged on the support 9, and the measuring pin 8 is used for measuring the outer diameter;
the inner diameter positioning pin 7 is arranged between the measuring pin 8 and the ball head measuring pin 5 and is fixed on the lower surface of the bottom plate 1;
a groove is formed in the connecting flat plate 10, the reading head 15 is fixed in the groove through a screw, and a distance is reserved between the reading head 15 and the grating ruler 13;
and handles b11 are arranged at two ends of the bottom plate 1 and used for carrying the measuring device.
The ball head measuring pin 5 and the measuring pin 8 are arranged on the same straight line, and the inner diameter positioning pin 7 is positioned on two sides of the central line of the ball head measuring pin 5 and the measuring pin 8.
The distance between the grating ruler 13 and the reading head 15 is 0.8mm.
The diameter range of the linkage ring 16 of the engine case part which can be measured by the device is 300mm-1200 mm.
The distance between the top point A and the top point B of the two ball head measuring pins 5 is required to be 50mm +/-0.01 mm.
The flatness requirement of the bottom surface of the bottom plate 1 is 0.04mm.
The verticality of the end surface C of the measuring pin 8 relative to the bottom surface of the bottom plate is required to be 0.01mm.
Claims (3)
1. A length measuring device applying a grating technology is characterized by comprising a bottom plate, a stop pin, a support, a connecting plate, a ball head measuring pin, an inner diameter positioning pin, a measuring pin, a support, a connecting flat plate, a handle, a guide rail, a grating ruler, a display screen, the grating ruler and a reading head;
the upper surface of the bottom plate is provided with double guide rails, the sliding block is arranged on the guide rails, and a grating ruler is arranged in the middle between the two guide rails;
the stop pin is arranged at the front end of the guide rail on the upper surface of the bottom plate and is used for ensuring the terminal position of the sliding block on the guide rail;
the upper surface of the sliding block is provided with a connecting flat plate, and the two sides of the connecting flat plate are both connected with a bracket;
the lower bottom surface of the bracket is fixed with the connecting plate through a screw;
ball head measuring pins are respectively arranged on two sides of the middle position of the connecting plate;
one end of the connecting flat plate is provided with a handle a for moving the ball head measuring pin during measurement;
the upper surface of the connecting flat plate is provided with a display screen, and the display screen is provided with a data line and is used for displaying the moving distance, namely the measured diameter size;
one end of the lower surface of the bottom plate is connected with a support, a measuring pin is arranged on the support, and the measuring pin is used for measuring the outer diameter;
the inner diameter positioning pin is arranged between the measuring pin and the ball head measuring pin and is fixed on the lower surface of the bottom plate;
the connecting flat plate is provided with a groove, the reading head is fixed in the groove through a screw, and a distance is reserved between the reading head and the grating ruler;
handles b are arranged at two ends of the bottom plate and used for carrying the measuring device;
the ball head measuring pin and the measuring pin are arranged on the same straight line, and the inner diameter positioning pins are positioned on two sides of the central line of the ball head measuring pin and the measuring pin;
the distance between the grating ruler and the reading head is 0.8mm;
the diameter range of a linkage ring of an engine case part which can be measured by the device is 300mm-1200mm of the inner diameter and the outer diameter;
the distance between the top points A and B of the two ball head measuring pins is required to be 50mm +/-0.01 mm.
2. A length measuring apparatus using a grating technique according to claim 1, wherein: the flatness requirement of the bottom surface of the bottom plate is 0.04mm.
3. A length measuring apparatus using a grating technique according to claim 1, wherein: the verticality of the end surface C of the measuring pin relative to the bottom surface of the bottom plate is required to be 0.01mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011277321.8A CN112304228B (en) | 2020-11-16 | 2020-11-16 | Length measuring device applying grating technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011277321.8A CN112304228B (en) | 2020-11-16 | 2020-11-16 | Length measuring device applying grating technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112304228A CN112304228A (en) | 2021-02-02 |
| CN112304228B true CN112304228B (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011277321.8A Active CN112304228B (en) | 2020-11-16 | 2020-11-16 | Length measuring device applying grating technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN112304228B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205120044U (en) * | 2015-09-08 | 2016-03-30 | 东莞市普迈精密测量科技有限公司 | Slide mechanism of grating chi |
| CN111735393A (en) * | 2020-07-13 | 2020-10-02 | 西安交通大学 | Device and method for synchronously measuring linear displacement and straightness of guide rail in situ |
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|---|---|---|---|---|
| KR20150042516A (en) * | 2013-10-11 | 2015-04-21 | 엠엔티(주) | Appratus for measuring three-dimensional mold shape using moire |
| CN204924123U (en) * | 2015-07-27 | 2015-12-30 | 青岛软控精工有限公司 | Interior external diameter measuring tool |
| CN204831126U (en) * | 2015-08-03 | 2015-12-02 | 山西北方机械制造有限责任公司 | Measure device of interior external diameter of cylinder work piece |
| CN205403669U (en) * | 2016-02-29 | 2016-07-27 | 无锡市派克重型铸锻有限公司 | A measuring tool for external diameter precision measurement in large ring |
| CN206300616U (en) * | 2016-11-30 | 2017-07-04 | 北华大学 | One kind teaching analytic tree annual ring measurement device of diameter |
| CN206876090U (en) * | 2017-06-28 | 2018-01-12 | 江苏高和智能装备股份有限公司 | A kind of big workpiece measuring device |
| CN208269836U (en) * | 2018-06-28 | 2018-12-21 | 广州会港智能装备有限公司 | A kind of measuring device with digital display device |
| CN109443160B (en) * | 2018-12-07 | 2021-06-25 | 中国航发南方工业有限公司 | Device and method for measuring outer diameter of annular groove in casing |
| CN210922458U (en) * | 2019-11-06 | 2020-07-03 | 江苏祺特汽车部件有限公司 | Novel inside and outside diameter detection device for machining and detecting tension roller |
| CN111351440A (en) * | 2020-05-06 | 2020-06-30 | 深圳市尼柯光学精密技术有限公司 | Measuring device based on grating ruler |
| CN111521122A (en) * | 2020-05-15 | 2020-08-11 | 南京航空航天大学 | Method and device for measuring outer diameter of pipe shell based on photoelectric sensing |
-
2020
- 2020-11-16 CN CN202011277321.8A patent/CN112304228B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205120044U (en) * | 2015-09-08 | 2016-03-30 | 东莞市普迈精密测量科技有限公司 | Slide mechanism of grating chi |
| CN111735393A (en) * | 2020-07-13 | 2020-10-02 | 西安交通大学 | Device and method for synchronously measuring linear displacement and straightness of guide rail in situ |
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| CN112304228A (en) | 2021-02-02 |
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