CN114264223B - Automatic measuring device for outer diameter of piston of aviation piston engine - Google Patents
Automatic measuring device for outer diameter of piston of aviation piston engineInfo
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- CN114264223B CN114264223B CN202111598482.1A CN202111598482A CN114264223B CN 114264223 B CN114264223 B CN 114264223B CN 202111598482 A CN202111598482 A CN 202111598482A CN 114264223 B CN114264223 B CN 114264223B
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- ball screw
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Abstract
The invention discloses an automatic measuring device for the outer diameter of a piston of an aviation piston engine, which comprises a supporting mechanism, a measuring mechanism and a regulating mechanism, wherein the supporting mechanism comprises a first frame for installing an electric element control box and a second frame for installing the measuring mechanism, the second frame is horizontally and oppositely arranged above the measuring mechanism in a concentric manner and is provided with a dial indicator, and the measuring mechanism comprises a supporting table, a horizontal movement mechanism and a lifting movement mechanism for driving the supporting table and also comprises a rotary movement mechanism arranged on the supporting table. The invention is mainly applied to the field of online measurement or quick maintenance measurement of parts of the revolving body, and the adopted measurement method has the advantages of high measurement accuracy, high measurement speed and high degree of automation, can obtain the diameter distribution of a plurality of positions of the revolving body by combining with automation, can obtain the roundness information of the measured part according to the data, can greatly improve the measurement speed, reduce the labor cost and can reduce the measurement error caused by human factors.
Description
Technical Field
The invention relates to the technical field of aviation piston engine production and maintenance, in particular to an automatic measurement device for the outer diameter of an aviation piston engine piston.
Background
At present, the piston outer diameter measurement work of a piston type engine is mainly finished by manual measurement. The measuring tool that manual measurement used is external micrometer, and measuring position includes that piston head and skirt are measured along the size of four positions of piston pin direction (direction of flight) and perpendicular piston pin direction (perpendicular direction of flight) two respectively, and measuring process wastes time and energy, and external micrometer's graduation value is 0.01mm, and the micrometer position is by estimating the reading and is obtained, causes personal error and the too little problem of measuring point position quantity easily.
Therefore, an automatic measuring device for the outer diameter of a piston of an aviation piston engine is needed to solve the problem.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an automatic measuring device for the outer diameter of an aviation piston engine piston, which adopts a coaxially opposite capacitance grid micrometer, the distance between the meters is calibrated by using standard dimension of a reference length, a revolving body part vertically passes through the connecting lines of measuring heads of the two capacitance grid micrometer along the center line of the two micrometers, and the diameter dimension of a measured revolving body is rapidly measured by using the numerical value measured by the reference value and the two micrometers.
In order to solve the technical problems, the invention provides the technical scheme that the automatic measuring device for the outer diameter of the piston of the aviation piston engine comprises a supporting mechanism, a measuring mechanism and a regulating mechanism;
The supporting mechanism comprises a first frame for mounting the electric element control box and a second frame for mounting the measuring mechanism, and dial gauges are horizontally and oppositely arranged above the measuring mechanism in a concentric manner;
The measuring mechanism comprises a supporting table, a horizontal movement mechanism and a lifting movement mechanism for driving the supporting table, and also comprises a rotary movement mechanism arranged on the supporting table.
As a preferred technical scheme of the invention, the saddle comprises two side plates, a bottom plate arranged between the bottoms of the two side plates, a back plate arranged on the back surfaces of the two side plates and a moving plate arranged between the tops of the two side plates;
The lifting motion mechanism comprises a first ball screw module, two side plates are in sliding connection in the second frame along the vertical direction, and the first ball screw module is fixedly arranged on the second frame and used for driving the supporting platform to lift;
The horizontal movement mechanism comprises a second ball screw module, the moving plate is connected between the tops of the two side plates in a sliding manner, and the second ball screw module is fixedly arranged on the upper surface of the bottom plate and is used for driving the moving plate to horizontally move;
The rotary motion mechanism comprises a rotary table, the rotary table is arranged at one end of the upper surface of the movable plate along the central line in the length direction, a stepping motor is arranged at the other end of the upper surface of the movable plate along the central line in the length direction, a rotating shaft penetrating through the movable plate is arranged at the center of the bottom of the rotary table, and the stepping motor is in transmission connection with the rotating shaft.
As a preferable technical scheme of the invention, the first ball screw module comprises a mounting seat, a ball screw body arranged on the mounting seat, a driving motor fixedly connected with the input end of the ball screw body and a movable seat fixedly connected with the output end of the ball screw body, wherein the mounting seat is fixedly connected with the second frame, the movable seat is fixedly connected with the back plate, and the second ball screw module has the same structure as the first ball screw module.
As a preferable technical scheme of the invention, the output end of the stepping motor penetrates through the moving plate, the output end of the stepping motor is in transmission connection with the rotating shaft through the synchronizing wheel sleeve, and the synchronizing wheel sleeve comprises a synchronizing wheel large wheel sleeved on the rotating shaft, a synchronizing wheel small wheel sleeved on the output end of the stepping motor and a synchronous belt sleeved on the synchronizing wheel large wheel and the synchronizing wheel small wheel.
As a preferable technical scheme of the invention, first sliding sleeves are arranged at four corners of two sides of each side plate, first sliding rods penetrate through the inside of each two first sliding sleeves, and the end parts of the first sliding rods are fixedly connected with the second frames.
As a preferable technical scheme of the invention, a U-shaped plate is arranged between the second ball screw module and the moving plate, second sliding sleeves are arranged at four corners of the bottom of the moving plate, second sliding rods penetrate through the two second sliding sleeves, and the end parts of the second sliding rods are fixedly connected with the two corners of the top of the side plate respectively.
As a preferable technical scheme of the invention, the top of the second frame is provided with a measuring door, the measuring door is provided with two jackets, and the two dial indicators are respectively and fixedly arranged in the jackets;
the adjusting mechanism comprises an adjusting standard rod for ensuring that the two jackets are coaxially installed.
As a preferable technical scheme of the invention, a piston to be detected is arranged at the top of the rotary table, thrust bearings are sleeved on two sides of the rotary shaft, a shaft sleeve is sleeved in the rotary shaft, an external thread is arranged at the bottom end of the rotary shaft, and an adaptive fixing nut is arranged at the bottom of the rotary shaft.
Compared with the prior art, the invention has the following beneficial effects:
The invention adopts a coaxially opposite capacitance grid micrometer, the standard dimension of the reference length is utilized to calibrate the distance between the gauges, the revolving body part vertically passes through the connecting line of measuring heads of the two capacitance grid micrometer along the center line of the two micrometer, and the diameter dimension of the measured revolving body is rapidly measured by using the reference value and the numerical value measured by the two micrometer.
Drawings
FIG. 1 is a schematic perspective view of the front face of the present invention;
FIG. 2 is a schematic perspective view of the back side of the present invention;
FIG. 3 is a schematic perspective view of a supporting mechanism according to the present invention;
FIG. 4 is a schematic perspective view of a measuring mechanism according to the present invention;
FIG. 5 is a schematic perspective view of the measuring mechanism of the present invention without the first ball screw module;
FIG. 6 is a schematic perspective view of a first ball screw module according to the present invention;
FIG. 7 is a schematic perspective view of a rotary motion mechanism according to the present invention;
FIG. 8 is a schematic diagram of a calibration standard rod calibration process according to the present invention;
FIG. 9 is a schematic diagram of the structure of FIG. 3A according to the present invention;
FIG. 10 is a schematic view of the structure of FIG. 5B according to the present invention;
Fig. 11 is a schematic diagram of a detection process of a piston to be detected according to the present invention.
Wherein:
1. A first frame;
2. A second frame 21, a measuring door 22, a jacket;
3. A dial gauge;
4. A side plate; 41, a first sliding sleeve, 42, a first sliding rod;
5. a bottom plate;
6. A back plate;
7. A moving plate; 71, a second sliding sleeve 72, a second sliding rod;
8. The device comprises a first ball screw module, 81, a mounting seat, 82, a ball screw body, 83, a driving motor, 84 and a moving seat;
9. A second ball screw module;
10. A turntable;
11. A stepping motor;
12. A rotating shaft;
13. The synchronous wheel is sleeved with a large synchronous wheel and a small synchronous wheel, namely a large synchronous wheel and a small synchronous wheel;
14. A U-shaped plate;
15. calibrating and installing a standard rod;
16. and a piston to be tested.
Detailed Description
In order that the manner in which the above recited features, objects and advantages of the present invention are obtained will become readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.
Examples:
1-11, an automatic measuring device for the outer diameter of a piston of an aviation piston engine comprises a supporting mechanism, a measuring mechanism and a regulating mechanism;
The supporting mechanism comprises a first frame 1 for installing an electric element control box and a second frame 2 for installing a measuring mechanism, wherein the second frame 2 is horizontally and oppositely arranged above the measuring mechanism and concentrically provided with a dial indicator 3, the electric element control box is respectively and electrically connected with a first ball screw module 8, a second ball screw module 9 and a stepping motor 11, and the height, the position and the angle of a piston 16 to be measured can be controlled through the electric element control box.
The measuring mechanism comprises a supporting table, a horizontal movement mechanism and a lifting movement mechanism for driving the supporting table, and also comprises a rotary movement mechanism arranged on the supporting table.
In other embodiments, the pallet comprises two side plates 4, a bottom plate 5 arranged between the bottoms of the two side plates 4, a back plate 6 arranged on the back surfaces of the two side plates 4, and a moving plate 7 arranged between the tops of the two side plates 4;
The lifting motion mechanism comprises a first ball screw module 8, two side plates 4 are in sliding connection in the second frame 2 along the vertical direction, the first ball screw module 8 is fixedly arranged on the second frame 2 and used for driving the supporting platform to lift, the first ball screw module 8 drives the supporting platform to move along the vertical direction, and then the height of a piston 16 to be detected arranged on the moving plate 7 can be adjusted to correspond to the position of the dial indicator 3.
The horizontal movement mechanism comprises a second ball screw module 9, wherein the moving plate 7 is in sliding connection between the tops of the two side plates 4, the second ball screw module 9 is fixedly arranged on the upper surface of the bottom plate 5 and used for driving the moving plate 7 to horizontally move, the second ball screw module 9 drives the moving plate 7 to horizontally move, and then the piston 16 to be measured is driven to move close to the measuring door 21, so that the piston passes between the two dial indicators 3, and the diameter of the piston is measured.
The rotary motion mechanism comprises a rotary table 10, wherein the rotary table 10 is arranged at one end of the upper surface of the movable plate 7 along the central line in the length direction, a stepping motor 11 is arranged at the other end of the upper surface of the movable plate 7 along the central line in the length direction, a rotating shaft 12 penetrating through the movable plate 7 is arranged at the center of the bottom of the rotary table 10, the stepping motor 11 is in transmission connection with the rotating shaft 12, and the stepping motor 11 can drive the rotating shaft 12 and the rotary table 10 to rotate so as to drive a piston 16 to be tested positioned on the rotary table 10 to rotate.
In other embodiments, the first ball screw module 8 includes a mounting seat 81, a ball screw body 82 disposed on the mounting seat 81, a driving motor 83 fixedly connected to an input end of the ball screw body 82, and a moving seat 84 fixedly connected to an output end of the ball screw body 82, the mounting seat 81 is fixedly connected to the second frame 2, the moving seat 84 is fixedly connected to the back plate 6, the second ball screw module 9 has the same structure as the first ball screw module 8, the driving motor 83 drives the moving seat 84 of a nut output end of the ball screw body 82 to move through a screw input end of the ball screw body 82, and under the cooperation of the first sliding rod 42 and the first sliding sleeve 41, the side plate 4 and the bottom plate 5 are driven to adjust the heights, so that sections of different heights of the piston 16 to be measured are adjusted to correspond to measuring ends of the dial indicator 3.
The function of the lifting movement mechanism according to fig. 1,3 and 6 is to realize the conversion of different measuring sections of the piston. In the measuring process, the measuring device needs to measure the outer diameter sizes of the two measuring sections of the head and the skirt of the piston, so that the position of the piston relative to the measuring door 21 needs to be adjusted in the z-axis direction, and the measuring door 21 is of a fixed structure, so that the piston needs to be lifted and lowered to realize the conversion of the measured section. In order to ensure levelness and stability, the motion adjustment realizes the conversion of the measuring section of the piston through the integral lifting of the measuring platform.
In other embodiments, the output end of the stepper motor 11 penetrates through the moving plate 7, the output end of the stepper motor 11 is in transmission connection with the rotating shaft 12 through the synchronizing wheel set 13, the synchronizing wheel set 13 comprises a synchronizing wheel big wheel 131 sleeved on the rotating shaft 12, a synchronizing wheel small wheel 132 sleeved on the output end of the stepper motor 11, and a synchronous belt sleeved on the synchronizing wheel big wheel 131 and the synchronizing wheel small wheel 132, the output end of the stepper motor 11 drives the synchronizing wheel small wheel 132 to drive the synchronizing wheel big wheel 131 to rotate under the cooperation of an adapting type synchronous belt (not shown in the figure), so that the rotating shaft 12 and the rotating disc 10 are driven to rotate, and the angle of the piston 16 to be measured is adjusted.
According to the piston rotary motion mechanism in fig. 1, 4, 5, 7 and 10, the function of the piston rotary motion mechanism is to realize the conversion of different measuring points of the same measuring section of the piston. During the measurement process, the outer diameters of the pistons at different positions in the same section are required to be measured, and the measured positions of the pistons are required to be adjusted. The piston rotary motion mechanism needs to realize the rotation of 15 degrees of angle each time along the center line of the moving plate 7 of the saddle according to the measurement requirement under the condition that the piston is fixedly installed, and the adjustment is needed for 12 times in the same measurement plane so as to ensure the full coverage of the measurement points taking the first measurement direction as the reference on the same section of the piston.
In other embodiments, the four corners on two sides of the two side plates 4 are respectively provided with a first sliding sleeve 41, the inside of each two first sliding sleeves 41 is penetrated by a first sliding rod 42, the end parts of the first sliding rods 42 are fixedly connected with the second frame 2, and the first sliding sleeves 41 are enabled to move along the first sliding rods 42, so that the adjustment of the height of the supporting platform can be realized under the driving of the first ball screw module 8.
In other embodiments, a U-shaped plate 14 is disposed between the second ball screw module 9 and the moving plate 7, the bottom four corners of the moving plate 7 are all provided with second sliding sleeves 71, and two second sliding sleeves 71 penetrate through the second sliding sleeves 72, the ends of the second sliding rods 72 are respectively and fixedly connected with the two corners of the top of the side plate 4, and the second ball screw module 9 adopts the same structure as the first ball screw module 9, so that the second ball screw module 9 can drive the moving plate 7 to move along the horizontal direction through the U-shaped plate 14 under the cooperation of the second sliding sleeves 71 and the second sliding rods 72, so that the piston 16 to be measured moves towards the measuring door 21 and the dial gauge 3.
According to the piston outer diameter measuring linear motion mechanism in fig. 1, 4, 5, 7 and 10, in the structure, the moving plate 7 for supporting the piston is connected with the second sliding rod 72 through the second sliding sleeve 71, and simultaneously, the linear motion of the measuring process is realized under the driving of the second ball screw module 9.
In other embodiments, the top of the second frame 2 is provided with a measuring door 21, the measuring door 21 is provided with two jackets 22, and the two dial indicators 3 are respectively and fixedly arranged in the jackets 22;
The adjusting mechanism comprises an adjusting standard rod 15 for ensuring that two jackets 22 are coaxially arranged;
according to fig. 8, before the dial indicator 3 is installed, the calibration standard rod 15 is inserted into the jacket 22, the calibration standard rod 15 is kept inserted into the jacket 22, the jacket 22 is fixed on the measuring door 21, after the fixing is completed, the calibration standard rod 15 is pulled out, and the dial indicator 3 is installed in the jacket 22, so that the horizontal concentric symmetrical arrangement of the two dial indicators 3 is realized.
In other embodiments, the top of the turntable 10 is provided with a piston 16 to be tested, thrust bearings are sleeved on two sides of the rotating shaft 12, which is positioned on the moving plate 7, a shaft sleeve is sleeved in the rotating shaft 12, which is positioned on the moving plate 7, an external thread is arranged at the bottom end of the rotating shaft 12, and an adaptive fixing nut is arranged at the bottom of the rotating shaft 12, and the arrangement of the thrust bearings and the shaft sleeve can enable the turntable 10 and the synchronizing wheel 131 to generate friction with the moving plate 7 in the rotating process, so that abrasion is reduced.
The operation process of the piston outer diameter measuring mechanism is as follows:
(1) The preparation stage:
leveling equipment;
Powering on the equipment;
The PLC and the digital dial indicator 3 upper computer software are connected with the inside of the electric element control box;
two digital dial indicators 3 are installed and adjusted by using a calibration standard rod 15;
and operating a 'find reference point' button on a control panel of the automatic element control box to clamp the piston.
(2) Calibration phase:
Operating a dial indicator 3 zero setting button, and completing reference calibration by using a reference length standard block;
Operating a 'find reference point' button on the control panel, and returning to the reference point;
And operating a single-point measurement button on the control panel, performing 20 times of automatic measurement on the same point, and analyzing data errors.
(3) Measuring:
Operating a multi-point measurement button, automatically measuring the head and the skirt of the piston at intervals of 15 degrees, and analyzing data errors;
Powering off the equipment;
measurement data is derived.
The outer diameter of the piston is measured according to the operation flow, the control part can drive the piston to pass through the two digital dial indicators 3 of the measuring door 21 according to a preset movement program by a motor, and the upper computer software automatically reads the measured data of the digital dial indicators 3 and stores and displays the measured data on an upper computer interface.
As shown in fig. 11, the piston 16 to be measured passes through the measuring gate 21 along the direction perpendicular to the connecting line of the two dial indicators 3, and the compression amount of the two dial indicators 3 in the process is continuously recorded according to the sampling time of the dial indicator 3, and the maximum values max (S1) and max (S2) of the compression amount of the two dial indicators are respectively collected and measured, and after the measurement is finished, the reference length L is added, l+max (S1) +max (S2), namely the piston diameter d=l+max (S1) +max (S2) is the outer diameter measurement result of the position.
In summary, the invention adopts the coaxially opposite capacitance grid micrometer, the standard dimension of the reference length is utilized to calibrate the distance between the meters, the revolution body part vertically passes through the connecting line of the measuring heads of the two capacitance grid micrometer along the center line of the two capacitance grid micrometer, the reference value and the numerical value measured by the two micrometer are utilized to rapidly measure the diameter dimension of the measured revolution body.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
It is necessary to explain that the electric components of the technical scheme of the application, such as the power component, the first motor, the second motor and the like, are all connected with an external controller, and the external controller is in the prior art, and the technical scheme of the application does not improve the external controller, so that the specific model, the circuit structure and the like of the external controller are not required to be disclosed, and the integrity of the technical scheme of the application is not affected.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598482.1A CN114264223B (en) | 2021-12-24 | 2021-12-24 | Automatic measuring device for outer diameter of piston of aviation piston engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598482.1A CN114264223B (en) | 2021-12-24 | 2021-12-24 | Automatic measuring device for outer diameter of piston of aviation piston engine |
Publications (2)
| Publication Number | Publication Date |
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| CN114264223A CN114264223A (en) | 2022-04-01 |
| CN114264223B true CN114264223B (en) | 2025-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111598482.1A Active CN114264223B (en) | 2021-12-24 | 2021-12-24 | Automatic measuring device for outer diameter of piston of aviation piston engine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379986A (en) * | 2023-04-18 | 2023-07-04 | 山东振挺精工活塞有限公司 | A device and method for quickly detecting the position of the inner pin seat of a piston |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018072175A (en) * | 2016-10-31 | 2018-05-10 | 株式会社東京精密 | Outer diameter measurement device, and measurement method |
| CN208567776U (en) * | 2018-08-24 | 2019-03-01 | 河北工业大学 | A kind of bearing bore diameter dimension automatic detection device |
| CN216791095U (en) * | 2021-12-24 | 2022-06-21 | 中国民航大学 | An automatic measuring device for piston outer diameter of aviation piston engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207946045U (en) * | 2018-02-07 | 2018-10-09 | 武汉市精华减速机制造有限公司 | A kind of pin gear outer diameter device for fast detecting |
| CN113607027A (en) * | 2021-07-08 | 2021-11-05 | 浙江铭振电子股份有限公司 | Outer diameter measuring equipment of motor end cover |
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2021
- 2021-12-24 CN CN202111598482.1A patent/CN114264223B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018072175A (en) * | 2016-10-31 | 2018-05-10 | 株式会社東京精密 | Outer diameter measurement device, and measurement method |
| CN208567776U (en) * | 2018-08-24 | 2019-03-01 | 河北工业大学 | A kind of bearing bore diameter dimension automatic detection device |
| CN216791095U (en) * | 2021-12-24 | 2022-06-21 | 中国民航大学 | An automatic measuring device for piston outer diameter of aviation piston engine |
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