CN110986806A - High-forming-precision seal head section coaxiality detection tool and detection method using same - Google Patents
High-forming-precision seal head section coaxiality detection tool and detection method using same Download PDFInfo
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- CN110986806A CN110986806A CN201911413072.8A CN201911413072A CN110986806A CN 110986806 A CN110986806 A CN 110986806A CN 201911413072 A CN201911413072 A CN 201911413072A CN 110986806 A CN110986806 A CN 110986806A
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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
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
-
- 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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
-
- 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
- G01B5/201—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring roundness
-
- 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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
Abstract
The invention provides a high-forming-precision seal head section coaxiality detection tool which comprises a large-curvature section detection tool and a small-curvature section detection tool, wherein the large-curvature section detection tool comprises a horizontal positioning disc, a vertical rotating shaft, a detection table and a laser range finder horizontally arranged on the detection table, the bottom end of the vertical rotating shaft is rotatably arranged at the circle center of the horizontal positioning disc, and the vertical position of the detection table is adjustably arranged on the vertical rotating shaft. In addition, the invention also provides a method for detecting the seal head by using the high-forming-precision seal head section coaxiality detection tool. The tool for detecting the coaxiality of the sections of the end socket with high forming precision and the method for detecting the coaxiality of the sections of the end socket with high forming precision have the advantages of scientific design, capability of accurately detecting the coaxiality of the circle centers of the sections of all the circumferences of the end socket and high practicability.
Description
Technical Field
The invention relates to a seal head detection device and a detection method, in particular to a seal head section coaxiality detection tool with high forming precision and a detection method using the seal head section coaxiality detection tool.
Background
In order to ensure that the forming shape of the end socket meets the product requirements, the shape of the end socket needs to be detected during production of the end socket, wherein the circumferential degree of each circumferential section of the end socket is an important measured value. The method can only measure the circumference of each circumferential section of the end socket, but cannot ensure the coaxiality of the circle centers of the circumferential sections, and can meet the detection requirements of common end sockets but cannot meet the detection requirements of end sockets with high forming precision.
The allowable concave-convex error of the ring surface of the common seal head is larger, which is about the product of 0.5 percent and the caliber of the seal head, but aiming at some high-tip fields of aerospace and the like, the requirements on the forming shape, the wall thickness and the material of the seal head are very high, for example, the diameter of the seal head of a rocket fuel thruster is about 4m, according to a common calculation method, the concave-convex error of the ring surface is about 20mm, but the allowable convex-concave error of the ring surface is not more than 3mm, and the coaxiality of the circle center of each circumferential section is very high, so the traditional detection method is not suitable for the detection of the seal head with high forming precision.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a high-forming-precision seal head section coaxiality detection tool which is scientific in design, capable of accurately detecting the coaxiality of the circle centers of all the circumferential sections of the seal head, and strong in practicability and a detection method using the same.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a high shaping precision head cross-section axiality detects frock, detects the frock including big camber section detection frock and little camber section, big camber section detection frock includes horizontal location disc, vertical pivot, detects platform and horizontal installation detect the last laser range finder of platform, vertical pivot bottom is rotationally installed the centre of a circle department of horizontal location disc, it installs adjustably to detect platform vertical position vertical pivot is last.
Based on the above, it is in to detect the platform including detecting the disc, setting locating piece and setting on the detection disc are in top tight screw on the locating piece, it corresponds to detect disc centre of a circle department vertical rotating shaft has seted up the mounting hole, the laser range finder is installed on the detection disc, the precession direction of top tight screw is just right vertical rotating shaft's outer wall setting.
Based on the above, little camber section detects frock includes hold in the palm end revolving stage, sets up hold in the palm the adjustment frame of end revolving stage side and install percentage table on the adjustment frame, hold in the palm end revolving stage top and be provided with central reference column, the gauge head level of percentage table sets up and moves towards central reference column one side, the gauge head of percentage table corresponds the outer wall setting of the head that awaits measuring, the adjustment frame adjustment the percentage table is close to or keeps away from central reference column.
Based on the above, the adjusting frame comprises an upward-inclining track and a sliding block arranged in the upward-inclining track in a sliding mode, the dial indicator is arranged on the sliding block, and the upward-inclining guide rail is gradually away from the central positioning column along with the increase of the height of the upward-inclining guide rail.
Based on the above, the diameters of the central positioning column and the horizontal positioning disk are equal.
In addition, the invention also provides a method for detecting the seal head by using the high-forming-precision seal head section coaxiality detection tool, which is characterized by comprising the following steps of: (a) testing a section with larger curvature close to the opening end of the end socket by using the large-curvature section detection tool; (b) and testing the gentle section close to the closed end of the seal head by using the small curvature section detection tool.
Based on the above, the step (a) comprises the following steps: (a1) a central positioning hole with the inner diameter equal to the outer diameter of the horizontal positioning disc is formed in the closed end of the end enclosure by taking the central point of the closed end of the end enclosure as the circle center; (a2) placing the open end of the seal head upwards, and adjusting the end face of the open end of the seal head to a horizontal position; (a3) placing the horizontal positioning disc in the central positioning hole, wherein the vertical rotating shaft is vertical to the horizontal plane; (a4) adjusting the height of the detection table to be flush with the end face of the opening end of the end socket, opening the laser range finder, rotating the vertical rotating shaft for a circle, measuring the distance from the central shaft to the whole ring surface of the opening end by the laser range finder, and recording the distance as an actual measurement radius; (a5) and gradually reducing the height of the detection platform until the detection platform is lowered to the lowest position capable of being detected, rotating the vertical rotating shaft for a circle every time of adjusting the height, and recording the actual measurement radius from the central shaft to the ring surfaces with different heights for subsequent analysis.
Based on the above, the step (b) comprises the following steps: (b1) taking the center point of the closed end of the end socket as the circle center, and forming a central positioning hole in the closed end of the end socket, so that the inner diameter of the central positioning hole is equal to the outer diameter of a central positioning column at the top of a bottom supporting rotary table; (b2) placing the closed end of the end socket downwards on the bottom supporting rotary table, enabling the central positioning column to extend into the central positioning hole, and adjusting the end face of the open end of the end socket to a horizontal position; (b3) placing a dial indicator outside the end socket, horizontally placing a measuring head of the dial indicator, and enabling the measuring head to abut against the outer wall of the end socket, wherein the measuring head of the dial indicator is positioned at the highest position of the gentle section of the end socket in an initial state; (b4) rotating the bottom supporting rotary table for one circle, and recording the jumping value of the measuring head of the dial indicator; (b5) and (c) gradually reducing the height of the dial indicator, enabling the measuring head to always abut against the outer wall of the end socket until the lowest position of the gentle section of the end socket, and repeating the step (b 4) every time the height is adjusted for subsequent analysis.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly, the invention utilizes the large-curvature section detection tool to test a section with larger curvature close to the opening end of the end socket, during the test, the end socket is horizontally placed, the closed end of the end socket is provided with a central positioning hole, the horizontal positioning disc is clamped in the central positioning hole, meanwhile, the vertical rotating shaft is vertical to the horizontal plane, so that the vertical rotating shaft can be used as a reference central shaft during the measurement, the vertical rotating shaft rotates for a circle, and the laser range finder is used for measuring the actual radius of each point of the ring surface with different heights of the end socket, thus ensuring that the ring surfaces with different heights are positioned on the same central shaft, leading the measured data to be capable of reflecting the information of the circumference and the coaxiality of the ring surfaces better and knowing the forming.
Because the curvature near the closed end of the end socket is small and tends to be gentle, the laser range finder in the large curvature section detection tool cannot measure the curvature at the position, so that the gentle section close to the closed end of the end socket is tested by using the small curvature section detection tool, the end socket is horizontally placed on the bottom supporting rotary table, so that the central positioning column extends into the central positioning hole and rotates along with the bottom supporting rotary table, the end socket can be driven to rotate by taking the reference central shaft as the center, meanwhile, a dial indicator is arranged on the outer wall of the gentle section of the end socket, according to the jumping value of the measuring head, can be used for calculating the outward convex and inward concave errors of the rings of the gentle sections, and also ensures that the rings of the gentle sections with different heights are positioned on the same central shaft, the measuring data can reflect the information of the circumference and the coaxiality of the ring surface, and the forming quality of the seal head can be better known.
The device has the advantages of scientific design, capability of accurately detecting the coaxiality of the circle centers of all the circumferential sections of the seal head, accurate detection of the circumferential degrees of all the circumferential sections of the seal head and strong practicability.
Drawings
Fig. 1 is a schematic structural diagram of a large curvature section detection tool in the invention.
FIG. 2 is a schematic structural diagram of the small curvature section detection tool in the invention.
In the figure: 1. a horizontal positioning disc; 2. a vertical rotating shaft; 3. detecting the disc; 4. positioning blocks; 5. jacking the screw tightly; 6. a laser range finder; 7. a bottom supporting rotary table; 8. a central positioning column; 9. an upward-inclined track; 10. a slider; 11. a dial indicator; 12. a probe.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1 and 2, the high-forming-precision seal head section coaxiality detection tool comprises a large-curvature section detection tool and a small-curvature section detection tool, wherein the large-curvature section detection tool specifically comprises a horizontal positioning disc 1, a vertical rotating shaft 2, a detection table and a laser range finder 6 horizontally arranged on the detection table, the bottom end of the vertical rotating shaft 2 is rotatably arranged at the circle center of the horizontal positioning disc 1, and the vertical position of the detection table is adjustably arranged on the vertical rotating shaft 2; horizontal location disc 1 is used for mutually supporting with the center locating hole of seting up at the head blind end, vertical rotating shaft 2 is as the benchmark center pin of head, examine the height that the platform is used for adjusting laser range finder 6, through vertical rotating shaft 2's rotation, laser range finder 6 can be used to measure the distance to each position of head inner wall.
The detection table specifically comprises a detection disc 3, a positioning block 4 arranged on the detection disc 3 and a tightening screw 5 arranged on the positioning block 4, a mounting hole is formed in the circle center of the detection disc 3 corresponding to the vertical rotating shaft 2, the laser range finder 6 is mounted on the detection disc 3, the screwing-in direction of the tightening screw 5 is over against the outer wall of the vertical rotating shaft 2, and the detection disc 3 is locked or loosened through screwing-in and screwing-out of the tightening screw 5; when the height needs to be adjusted, the jacking screw 5 is unscrewed, and after the height is adjusted to a target position, the jacking screw 5 is screwed, so that the positioning is realized.
The small curvature section detection tool specifically comprises a bottom supporting rotary table 7, an adjusting frame arranged on the side surface of the bottom supporting rotary table 7 and a dial indicator 11 installed on the adjusting frame, wherein a central positioning column 8 is arranged at the top of the bottom supporting rotary table 7, a measuring head 12 of the dial indicator 11 is horizontally arranged and faces one side of the central positioning column 8, the measuring head 12 of the dial indicator 11 is arranged corresponding to the outer wall of the end socket to be detected, and the adjusting frame adjusts the dial indicator 11 to be close to or far away from the central positioning column 8; the end supporting rotary table 7 is used for placing the end socket, the central positioning column 8 is used for being matched with a central positioning hole formed in the closed end of the end socket, when the end supporting rotary table 7 rotates, the end socket also rotates by taking the reference central shaft as a rotating shaft, the measuring head 12 of the dial indicator 11 is used for abutting against the outer wall of the gentle section of the end socket, and the gentle section annular actual outer diameter data can be calculated according to the jumping value of the measuring head 12.
The adjusting frame specifically comprises an upward-inclined track 9 and a sliding block 10 arranged in the upward-inclined track 9 in a sliding manner, the dial indicator 11 is arranged on the sliding block 10, and the upward-inclined guide rail 9 is gradually far away from the central positioning column 8 along with the increase of the height of the upward-inclined guide rail 9; along with the sliding of the sliding block 10 on the upper inclined track 9, the position of the dial indicator 11 can be adjusted, so that the measuring head 12 of the dial indicator 11 always abuts against the outer wall of the gentle section of the end socket, and the actual outer diameters of the ring surfaces of the gentle section with different heights can be measured.
Furthermore, the diameter of the central positioning column 8 is equal to that of the horizontal positioning disc 1, so that when the sealing head is used, only one central positioning hole needs to be formed in the center of the closed end of the sealing head according to the size.
When utilizing above-mentioned high shaping precision head cross-section axiality to detect frock and detect the head, specifically include following step:
(1) taking the center point of the closed end of the end socket as the circle center, forming a center positioning hole at the closed end of the end socket, wherein the inner diameter of the center positioning hole is equal to the outer diameters of the horizontal positioning disc 1 and the center positioning column 8;
(2) placing the open end of the seal head upwards, adjusting the end face of the open end of the seal head to a horizontal position, and particularly placing the seal head on a leveling tool for leveling;
(3) the horizontal positioning disc 1 is placed in the central positioning hole, at the moment, the vertical rotating shaft 2 is perpendicular to the horizontal plane, and the vertical rotating shaft 2 can be used as a reference central shaft of the seal head;
(4) adjusting the height of the detection disc 3 to enable the height of the laser range finder 6 to be flush with the end face of the opening end of the end socket, opening the laser range finder 6, rotating the vertical rotating shaft 2 for a circle, enabling the laser range finder 6 to measure the distance from the central shaft to the whole ring surface of the opening end, and recording the distance as an actually measured radius;
(5) gradually reducing the height of the detection disc 3 until the detection disc is lowered to the lowest position where the detection disc can be detected, rotating the vertical rotating shaft 2 for a circle every time the height is adjusted, recording the actual measurement radius from the central shaft to the ring surfaces with different heights for subsequent analysis, and completing the test of the section with larger curvature close to the opening end of the end enclosure;
(6) taking down the end socket, placing the closed end of the end socket on the bottom supporting rotary table 7 downwards, enabling the central positioning column 8 to extend into the central positioning hole, and adjusting the end surface of the open end of the end socket to a horizontal position, so that the end socket can rotate by taking the reference central shaft as a rotating shaft when the bottom supporting rotary table 7 rotates;
(7) adjusting the height of the dial indicator 11 to enable a measuring head 12 to abut against the outer wall of the highest position of the flat section of the end socket;
(8) rotating the bottom supporting rotary table 7 for a circle, and recording the jumping value of the measuring head 12 of the dial indicator 11;
(9) and (5) gradually reducing the height of the dial indicator 11, enabling the measuring head 12 to always abut against the outer wall of the end socket until the lowest position of the gentle section of the end socket is reached, repeating the step (8) every time the height is adjusted for subsequent analysis, and testing the gentle section close to the closed end of the end socket.
The detection method is particularly suitable for detecting the end socket of the rocket thruster, and the bottom of the final end socket product is provided with a through hole. The invention utilizes the structural characteristics of the product, when in detection, the bottom of the end socket is provided with a central positioning hole in advance (the aperture of the central positioning hole is smaller than that of a through hole of the finished end socket, which is convenient for subsequent further processing), so that a reference central shaft of the end socket is conveniently found, a foundation is provided for accurate detection, and particularly, the mode ensures that ring surfaces with different heights are positioned on the same central shaft, so that measured data can reflect the information of the circumference and the coaxiality of the ring surfaces, the forming quality of the end socket is accurately known, and the requirement of high-accuracy end socket shape detection is met.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a high shaping precision head cross-section axiality detects frock which characterized in that: detect frock and little curvature section including big curvature section, big curvature section detects the frock and includes horizontal location disc, vertical pivot, detects the platform and horizontal installation detect the laser range finder on the platform, vertical pivot bottom is rotationally installed the centre of a circle department of horizontal location disc, it installs adjustably to detect platform vertical position in vertical pivot.
2. The high forming precision seal head section coaxiality detection tool according to claim 1, is characterized in that: the detection table comprises a detection disc, a positioning block and a jacking screw, wherein the positioning block is arranged on the detection disc, the jacking screw is arranged on the positioning block, the circle center of the detection disc corresponds to the vertical rotating shaft, a mounting hole is formed in the vertical rotating shaft, the laser range finder is arranged on the detection disc, and the screwing direction of the jacking screw is right opposite to the outer wall of the vertical rotating shaft.
3. The high forming precision seal head section coaxiality detection tool according to claim 1 or 2, characterized in that: the small curvature section detection tool comprises a support bottom rotating table, an adjusting frame and a dial indicator, wherein the adjusting frame is arranged on the side face of the support bottom rotating table, the dial indicator is installed on the adjusting frame, a central positioning column is arranged at the top of the support bottom rotating table, a measuring head of the dial indicator horizontally faces to one side of the central positioning column, the measuring head of the dial indicator corresponds to the outer wall of a to-be-detected end socket and is adjusted to be close to or far away from the central positioning column.
4. The high forming precision seal head section coaxiality detection tool according to claim 3, characterized in that: the adjusting frame comprises an upward-inclining track and a sliding block arranged in the upward-inclining track in a sliding mode, the dial indicator is installed on the sliding block, and the upward-inclining guide rail is gradually away from the central positioning column along with the rising of the height of the upward-inclining guide rail.
5. The high forming precision seal head section coaxiality detection tool according to claim 4, is characterized in that: the diameters of the central positioning column and the horizontal positioning disc are equal.
6. A method for detecting a seal head by using the high-forming-precision seal head section coaxiality detection tool of any one of claims 1 to 5 is characterized by comprising the following steps of:
a) testing a section with larger curvature close to the opening end of the end socket by using the large-curvature section detection tool;
b) and testing the gentle section close to the closed end of the seal head by using the small curvature section detection tool.
7. The method of detecting a head of claim 6, wherein step (a) comprises the steps of:
(a1) a central positioning hole with the inner diameter equal to the outer diameter of the horizontal positioning disc is formed in the closed end of the end enclosure by taking the central point of the closed end of the end enclosure as the circle center;
(a2) placing the open end of the seal head upwards, and adjusting the end face of the open end of the seal head to a horizontal position;
(a3) placing the horizontal positioning disc in the central positioning hole, wherein the vertical rotating shaft is vertical to the horizontal plane;
(a4) adjusting the height of the detection table to be flush with the end face of the opening end of the end socket, opening the laser range finder, rotating the vertical rotating shaft for a circle, measuring the distance from the central shaft to the whole ring surface of the opening end by the laser range finder, and recording the distance as an actual measurement radius;
(a5) and gradually reducing the height of the detection platform until the detection platform is lowered to the lowest position capable of being detected, rotating the vertical rotating shaft for a circle every time of adjusting the height, and recording the actual measurement radius from the central shaft to the ring surfaces with different heights for subsequent analysis.
8. A method of inspecting a closure according to claim 6 or 7, wherein step (b) comprises the steps of:
(b1) taking the center point of the closed end of the end socket as the circle center, and forming a central positioning hole in the closed end of the end socket, so that the inner diameter of the central positioning hole is equal to the outer diameter of a central positioning column at the top of a bottom supporting rotary table;
(b2) placing the closed end of the end socket downwards on the bottom supporting rotary table, enabling the central positioning column to extend into the central positioning hole, and adjusting the end face of the open end of the end socket to a horizontal position;
(b3) placing a dial indicator outside the end socket, horizontally placing a measuring head of the dial indicator, and enabling the measuring head to abut against the outer wall of the end socket, wherein the measuring head of the dial indicator is positioned at the highest position of the gentle section of the end socket in an initial state;
(b4) rotating the bottom supporting rotary table for one circle, and recording the jumping value of the measuring head of the dial indicator;
(b5) and (c) gradually reducing the height of the dial indicator, enabling the measuring head to always abut against the outer wall of the end socket until the lowest position of the gentle section of the end socket, and repeating the step (b 4) every time the height is adjusted for subsequent analysis.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113674345A (en) * | 2021-10-25 | 2021-11-19 | 成都新西旺自动化科技有限公司 | Two-dimensional pixel-level three-dimensional positioning system and positioning method |
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| CN113674345A (en) * | 2021-10-25 | 2021-11-19 | 成都新西旺自动化科技有限公司 | Two-dimensional pixel-level three-dimensional positioning system and positioning method |
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