CN117006927A - Accurate tubular product axiality measuring device - Google Patents

Accurate tubular product axiality measuring device Download PDF

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Publication number
CN117006927A
CN117006927A CN202310739356.6A CN202310739356A CN117006927A CN 117006927 A CN117006927 A CN 117006927A CN 202310739356 A CN202310739356 A CN 202310739356A CN 117006927 A CN117006927 A CN 117006927A
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CN
China
Prior art keywords
positioning
pipe
precision
tube
measuring device
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Pending
Application number
CN202310739356.6A
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Chinese (zh)
Inventor
江华
李欢妮
周际华
黄建新
凌旭锋
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Zhejiang Jiuli Hi Tech Metals Co Ltd
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Zhejiang Jiuli Hi Tech Metals Co Ltd
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Application filed by Zhejiang Jiuli Hi Tech Metals Co Ltd filed Critical Zhejiang Jiuli Hi Tech Metals Co Ltd
Priority to CN202310739356.6A priority Critical patent/CN117006927A/en
Publication of CN117006927A publication Critical patent/CN117006927A/en
Pending legal-status Critical Current

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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
    • G01B5/24—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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention belongs to the technical field of measuring and positioning devices, and particularly relates to a precision tube coaxiality measuring device. According to the invention, the nylon positioning sleeve which does not contain harmful elements such as fluorine, chlorine, sulfur, lead and the like is used, so that the phenomena of scratching, bruising and the like on the surface of the precise pipe are avoided while the supporting and positioning are effectively ensured, and the high standard requirements of pollution prevention and surface protection of the precise pipe are met. The central axis of the inner wall of the pipe is coaxial with the rotation axis of the positioning mechanism, so that the positioning precision is high, the guidance quality is good, and the measurement accuracy of the coaxiality is further improved. In addition, the positioning mechanism is matched with pipes with different diameters, and the pipe fitting device is convenient and flexible to operate and wide in application range. According to the invention, the driving mechanism is matched with the measuring mechanism, so that 360-degree omnibearing measurement is carried out on the outer wall of the pipe, the accuracy and reliability of a detection data result are effectively improved, the measurement error is reduced, and the detection efficiency is effectively improved.

Description

Accurate tubular product axiality measuring device
Technical Field
The invention belongs to the technical field of measuring and positioning devices, and particularly relates to a precision tube coaxiality measuring device.
Background
In the field of precision manufacturing in the mechanical industry, machining and inspection of shaft-type workpieces is always an important and complex problem. From a certain angle, the detection precision in the manufacturing process of the shaft workpiece reversely restricts the machining precision. The precision detection capability is improved, the processing quality is further guaranteed, and the method has important significance for the development of the manufacturing level of the pushing shaft type workpiece. Axiality refers to roundness, concentricity, circumference runout and section difference of shaft parts, plays a role in positioning, and mainly influences the guidance quality of products. It is known that in the assembly process of a machine, high-precision parts can be assembled smoothly and a good working state is ensured, so that the existing part manufacturers also need to carry out strict precision measurement after the parts are machined. In particular to a precise pipe applied to the fields of nuclear power, aviation, military industry and the like, and has higher standard and higher requirement on the production inspection of products due to the special industry. The most important point affecting the precision pipe machining precision is that the pipe has higher dimensional tolerance requirement, and the dimension is controlled by strict handle, so that the subsequent equipment manufacturer can assemble the pipe conveniently.
At present, when measuring shaft workpieces, a three-coordinate measurement mode is generally adopted, but the operability is not strong by adopting the detection mode under the condition of large quantity of materials on site and limited space of a test site, and the skill requirement on operators is high and the measurement process is complicated. In addition, the three-coordinate measuring mode is easy to clamp and unstable, so that the precision pipe workpiece is displaced in the measuring process, and the accuracy of the measuring result of the coaxiality of the precision pipe workpiece is further affected. In addition, when the three-coordinate measuring instrument is used for measurement, the precision pipe workpiece is difficult to scratch and pollute, and then the product quality is affected. Therefore, it is necessary to develop a novel convenient device to improve efficiency and accuracy in measuring coaxiality of precision pipe workpieces while meeting the requirements of field operation environment.
Disclosure of Invention
The invention provides a precision tube coaxiality measuring device for overcoming the defects that a precision tube coaxiality measuring device in the prior art is complex in operation, difficult to assemble, inconvenient to carry, difficult to avoid scratch, pollute the precision tube, inaccurate in detection, low in detection efficiency and difficult to adapt to the requirements of field operation environments.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme:
a precision tubing coaxiality measurement device comprising:
the positioning mechanism is inserted into the pipe from one end of the pipe and is coaxially arranged with the inner wall of the pipe;
the driving mechanism is rotationally connected with the positioning mechanism;
and the measuring mechanism is arranged on the driving mechanism, one end of the measuring mechanism is mutually abutted with the outer wall of the pipe, and the measuring mechanism can be driven by the driving mechanism to rotate along the outer wall of the pipe.
The precision pipe coaxiality measuring device comprises a positioning mechanism which is inserted into the pipe from one end of the pipe and is coaxially arranged with the inner wall of the pipe. The positioning mechanism is made of materials containing no harmful elements such as fluorine, chlorine, sulfur, lead and the like, so that the problems that the precise pipe is polluted, expansion, shrinkage and deformation and the like are easy to occur are effectively avoided, the supporting and positioning are effectively ensured, and the phenomena that the surface of the precise pipe is scratched, bumped and the like are prevented. Thereby reaching the high standard requirements of pollution prevention and surface protection of the precise pipe and further improving the product quality of the precise pipe. Meanwhile, the central axis of the inner wall of the pipe is coaxial with the rotation axis of the positioning mechanism, stable support and fixation of the pipe can be achieved, the pipe is effectively prevented from being displaced in the coaxiality measurement process, positioning accuracy is high, guidance quality is good, and coaxiality measurement accuracy is further improved. In addition, the positioning mechanism is matched with pipes with different diameters, and the positioning mechanism is convenient to operate, flexible and wide in application range, and has a wide application prospect.
The precision pipe coaxiality measuring device also comprises a driving mechanism which is rotationally connected with the positioning mechanism. The device also comprises a measuring mechanism arranged on the driving mechanism. One end of the measuring mechanism is mutually abutted with the outer wall of the pipe, so that the measuring mechanism can be driven by the driving mechanism to rotate along the outer wall of the pipe. Through actuating mechanism and measuring mechanism matched with, realize carrying out 360 omnidirectional measurement to tubular product outer wall, effectively improve the accuracy and reliability of detection data result, reduce measuring error, effectively improve detection efficiency simultaneously. In addition, the 360-degree omnibearing measurement mode is adopted to replace complex clamping operation, so that the operation steps in the measurement process are simplified, the need of multiple repositioning operations in the measurement process is effectively avoided, and the measurement efficiency is further improved. The precision tube coaxiality measuring device is simple and convenient to operate, convenient to assemble, convenient to carry, high in measuring precision, stable and accurate in detection data, suitable for field production and inspection of precision tubes of different specifications, and wide in practicability.
Preferably, the positioning mechanism comprises a central positioning rod which is inserted into the pipe and can move back and forth along the axial direction of the pipe, a plurality of positioning sleeves are sleeved on the part, located inside the pipe, of the central positioning rod, and a tightening handle is sleeved on the part, located outside the pipe, of the central positioning rod.
Through the arrangement, the positioning sleeve is sleeved on the central positioning rod and is gradually screwed up to screw up the handle after being inserted into the measured pipe, so that the central positioning rod is slowly tightened and moves from the inside of the pipe to the outside of the pipe along the axial direction of the pipe. The center positioning rod drives the positioning sleeve to move together until the positioning sleeve is abutted against the rotating seat, and the movement is stopped. The central axis of tubular product inner wall is coaxial with the axis of revolution of the central locating lever in the positioning mechanism, and sets up a plurality of position sleeves, can realize the steady rest to tubular product, effectively avoids the axiality to measure in-process tubular product and takes place the displacement, and positioning accuracy is high, and stability is good, further improves the measurement accuracy of axiality. In addition, through tightening the handle, can fix center locating lever and spacer sleeve fast, help simplifying the measurement operation step, effectively improve measurement efficiency and accuracy. In addition, the positioning mechanism is matched with pipes with different diameters, and the positioning mechanism is convenient to operate, flexible and wide in application range, and has a wide application prospect.
Preferably, the positioning sleeve comprises a positioning sleeve main body, one side end part of the positioning sleeve main body is provided with an outer convex part which is in a round table shape, and the other side end part of the positioning sleeve main body is provided with an inner concave part which is matched with the outer convex part in shape.
The longitudinal sections of the outer convex part and the inner concave part which are both in the truncated cone-shaped structure are in wedge-shaped structures, so that the structural stability of the positioning sleeve is improved, and the sliding or deformation of the positioning sleeve in the use process is effectively avoided. Meanwhile, the outer convex part and the inner concave part with special structures can bear larger load, so that the durability and the reliability of the positioning sleeve are improved, and the pipe is supported and fixed rapidly. In addition, the locating sleeve can accurately locate the central locating rod to a designated position, so that the central axis of the inner wall of the pipe is coaxial with the rotation axis of the central locating rod, and the locating precision is high.
Further preferably, the outer protruding portion of the adjacent positioning sleeve is engaged with the inner recessed portion.
The adjacent positioning sleeves can be mutually clamped and matched with the concave parts through the outer convex parts at the corresponding positions. Because the longitudinal sections of the outer convex part and the inner concave part of the positioning sleeve are of wedge-shaped structures, plastic deformation is easy to occur under the tensile force action of the central positioning rod, so that the outer wall of the positioning sleeve outwards extrudes the pipe, and the inner wall of the positioning sleeve inwards extrudes the central positioning rod, thereby realizing that the rotation axis of the central positioning rod is coaxial with the central axis of the inner wall of the pipe while the positioning mechanism and the pipe are locked and fixed, and further guaranteeing the measurement accuracy. Meanwhile, the outer convex portions and the inner concave portions which are of wedge-shaped structures in longitudinal sections are clamped between the positioning sleeves to form a plurality of positioning points, and the reliability of interconnection between the positioning sleeves is improved.
Further preferably, the concave portions of the adjacent positioning sleeves are symmetrically arranged in the vertical direction.
Through the arrangement, the overall structural stability and structural rigidity of the positioning mechanism are enhanced.
Preferably, a limiting part for limiting the positioning sleeve is arranged at the end part of the central positioning rod, which is positioned in the pipe.
The locating sleeve is limited through the limiting part, so that the locating sleeve is effectively prevented from sliding and falling off on the central locating rod, and the connection stability between the locating sleeve and the central locating rod is further improved. Meanwhile, the positioning sleeve is beneficial to ensuring the position of the positioning sleeve, so that the positioning sleeve is tightly contacted with the pipe, and the positioning sleeve is further promoted to be more accurate in guiding and positioning.
Preferably, the driving mechanism comprises a rolling assembly arranged between the positioning sleeve and the tightening handle, a rotating seat is sleeved outside the rolling assembly, a supporting seat is fixedly connected outside the rotating seat, and the supporting seat and the pipe are axially arranged in parallel.
The rolling assembly sleeved on the central positioning rod is matched with the supporting seat arranged outside the rotating seat through the sleeve arranged inside the rotating seat, so that the measuring mechanism fixed on the supporting seat can be driven by the rolling assembly to rotate along the outer wall of the pipe, and 360-degree omnibearing measurement on the outer wall of the pipe is realized. The accuracy and the reliability of the detection data result are effectively improved, the measurement error is reduced, and the detection efficiency is effectively improved. In addition, the 360-degree omnibearing measurement mode is adopted to replace complex clamping operation, so that the operation steps in the measurement process are simplified, the need of multiple repositioning operations in the measurement process is effectively avoided, and the measurement efficiency is further improved.
Preferably, the rolling assembly is formed by combining a plurality of rolling bearings sleeved outside the center positioning rod.
As a further preference, the rolling assembly is obtained by combining a plurality of rolling bearings with the standard of precision grade of ISO grade P4 sleeved outside the centering rod.
Because the friction coefficient of the rolling bearing is small, the rotating speed is high, the noise is low, the operation efficiency of the driving assembly is improved, and the service life of the driving assembly is prolonged.
Preferably, the measuring mechanism comprises a dial indicator vertically arranged on the supporting seat, the dial indicator comprises a gauge head positioned above the supporting seat, and the dial indicator further comprises a probe penetrating through the supporting seat and propped against the outer wall of the pipe.
Further preferably, the accuracy of the dial indicator is 0.001mm.
The dial indicator is a high-precision measuring tool, can accurately measure tiny dimensional changes, and can realize real-time monitoring of the outer wall of the pipe. The design of supporting seat helps improving measuring mechanism's supporting stability, makes gauge outfit and probe of amesdial keep the state mutually perpendicular with tubular product outer wall, prevents effectively that the amesdial from taking place to remove or rocking, further improves measuring data's accuracy.
Preferably, the gauge head of the dial indicator is made of polyether-ether-ketone (PEEK).
Through the arrangement, scratches on the surface of the tube by the dial indicator are effectively avoided.
Preferably, a locking screw for fixing the position of the probe is arranged on the supporting seat close to the probe.
The probe position is fixed through the locking screw, so that the structural stability is enhanced, and meanwhile, the probe is effectively prevented from shifting or falling off in the detection process, so that the measurement accuracy and the detection safety are improved.
Preferably, the center positioning rod is in threaded connection with the tightening handle.
The center locating rod is in threaded connection with the tightening handle, so that looseness of the center locating rod and the tightening handle in the measuring process is effectively prevented, and the connection stability between the center locating rod and the tightening handle is improved. Meanwhile, the position of the center positioning rod is convenient to adjust by tightening the handle, so that more accurate positioning is realized.
Preferably, the positioning sleeve is made of nylon.
The positioning sleeve is made of nylon materials which do not contain harmful elements such as fluorine, chlorine, sulfur, lead and the like, so that the precise pipe is effectively prevented from being polluted. Meanwhile, as the nylon material has high density, smooth surface, wear resistance, easy processing and difficult expansion and contraction deformation, the phenomena of scratching, bruising and the like on the surface of the precise pipe are avoided while the supporting and positioning are effectively ensured. Thereby reaching the high standard requirements of pollution prevention and surface protection of the precise pipe and further improving the product quality of the precise pipe.
Therefore, the invention has the following beneficial effects:
(1) The nylon positioning sleeve containing no harmful elements such as fluorine, chlorine, sulfur, lead and the like is used, so that the phenomena of scratching, bruising and the like on the surface of the precision pipe are avoided while the supporting and positioning are effectively ensured. Thereby meeting the high standard requirements of pollution prevention and surface protection of the precision pipe and further improving the product quality of the precision pipe;
(2) The central axis of the inner wall of the pipe is coaxial with the rotation axis of the positioning mechanism, so that the positioning precision is high, the guidance quality is good, and the measurement accuracy of the coaxiality is further improved. In addition, the positioning mechanism is matched with pipes with different diameters, and the pipe fitting device is convenient and flexible to operate and wide in application range, and can be assembled and used at any time;
(3) According to the invention, the driving mechanism is matched with the measuring mechanism, so that 360-degree omnibearing measurement is carried out on the outer wall of the pipe, the accuracy and reliability of a detection data result are effectively improved, the measurement error is reduced, and the detection efficiency is effectively improved. Meanwhile, the method is beneficial to simplifying operation steps, effectively avoiding the need of repositioning operation for multiple times in the measurement process, and further improving the measurement efficiency;
(4) The precision tube coaxiality measuring device is simple and convenient to operate, convenient to assemble, convenient to carry, high in measuring precision, stable and accurate in detection data, suitable for field production and inspection of precision tubes of different specifications, and wide in practicability.
Drawings
Fig. 1 is a schematic diagram of an assembly structure of a precision tube coaxiality measuring device and a tube.
Fig. 2 is a schematic cross-sectional view of a precision tube coaxiality measurement device.
Fig. 3 is a partially enlarged schematic view of fig. 2 at a.
In the figure: a positioning mechanism 1; a pipe 2; a driving mechanism 3; a measuring mechanism 4; a center positioning rod 5; a positioning sleeve 6; tightening the handle 7; a positioning sleeve main body 8; an outer flange 9; a concave portion 10; a limit part 11; a rolling assembly 12; a rotating seat 13; a support base 14; a rolling bearing 15; a dial gauge 16; a header 17; a probe 18; locking screw 19.
Detailed Description
The invention is further described below with reference to the drawings and specific examples. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are typically only some, but not all, embodiments of the present invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
Example 1
As shown in fig. 1 to 3, the precision tube 2 coaxiality measuring device of the present invention comprises a positioning mechanism 1 inserted into the tube 2 from one end of the tube 2 and coaxially arranged with the inner wall of the tube 2. The positioning mechanism 1 is made of materials containing no harmful elements such as fluorine, chlorine, sulfur, lead and the like, so that the problems that the precision pipe 2 is polluted, is easy to expand and shrink and deform and the like are effectively avoided, the supporting and positioning are effectively ensured, and the phenomena that the surface of the precision pipe 2 is scratched, bumped and the like are prevented. Thereby reaching the high standard requirements of pollution prevention and surface protection of the precision tube 2 and further improving the product quality of the precision tube 2. Meanwhile, the central axis of the inner wall of the pipe 2 is coaxial with the rotation axis of the positioning mechanism 1, stable support and fixation of the pipe 2 can be realized, the pipe 2 is effectively prevented from being displaced in the coaxiality measurement process, the positioning accuracy is high, the guidance quality is good, and the coaxiality measurement accuracy is further improved. In addition, the positioning mechanism 1 is matched with the pipes 2 with different diameters, and the pipe fitting device is convenient to operate, flexible and wide in application range, and has a wide application prospect.
The coaxiality measuring device of the precise pipe 2 also comprises a driving mechanism 3 which is rotationally connected with the positioning mechanism 1. And further comprises a measuring mechanism 4 arranged on the driving mechanism 3. One end of the measuring mechanism 4 is abutted against the outer wall of the pipe 2, so that the measuring mechanism 4 can be driven by the driving mechanism 3 to rotate along the outer wall of the pipe 2. Through the cooperation of actuating mechanism 3 and measuring mechanism 4, realize carrying out 360 omnidirectional measurement to tubular product 2 outer wall, effectively improve the accuracy and reliability of detection data result, reduce measuring error, effectively improve detection efficiency simultaneously. In addition, the 360-degree omnibearing measurement mode is adopted to replace complex clamping operation, so that the operation steps in the measurement process are simplified, the need of multiple repositioning operations in the measurement process is effectively avoided, and the measurement efficiency is further improved. The precision tube 2 coaxiality measuring device is simple and convenient to operate, convenient to assemble, convenient to carry, high in measuring precision, stable and accurate in detection data, suitable for field production and inspection of precision tubes 2 with different specifications, and wide in practicability.
The positioning mechanism 1 comprises a central positioning rod 5 inserted inside the tube 2 and movable axially back and forth along the tube 2. The part of the central positioning rod 5 positioned inside the pipe 2 is sleeved with a plurality of positioning sleeves 6. The part of the central positioning rod 5 positioned outside the pipe 2 is sleeved with a tightening handle 7.
Through the arrangement, the positioning sleeve 6 is sleeved on the central positioning rod 5 and is gradually screwed down to screw down the handle 7 after being inserted into the measured pipe 2, so that the central positioning rod 5 is slowly tightened and moves from the inside of the pipe 2 to the outside of the pipe 2 along the axial direction of the pipe 2. The center positioning rod 5 drives the positioning sleeve 6 to move together until the positioning sleeve 6 abuts against the rotating seat 13, and the movement is stopped. The central axis of the inner wall of the pipe 2 is coaxial with the rotation axis of the central positioning rod 5 in the positioning mechanism 1, and the positioning sleeves 6 are arranged, so that stable support of the pipe 2 can be realized, the pipe 2 is effectively prevented from being displaced in the coaxiality measurement process, the positioning accuracy is high, the stability is good, and the measurement accuracy of coaxiality is further improved. In addition, through tightening handle 7 can be fast fixed center locating lever 5 and spacer bush 6, help simplifying the measurement operation step, effectively improve measurement efficiency and accuracy. In addition, the positioning mechanism 1 is matched with the pipes 2 with different diameters, and the pipe fitting device is convenient to operate, flexible and wide in application range, and has a wide application prospect.
The positioning sleeve 6 comprises a positioning sleeve main body 8, and an outer convex part 9 which is in a round table shape is arranged at one side end part of the positioning sleeve main body 8. The other side end of the positioning sleeve main body 8 is provided with an inner concave part 10 which is matched with the shape of the outer convex part 9.
The longitudinal sections of the outer convex part 9 and the inner concave part 10 which are both in a truncated cone-shaped structure are in a wedge-shaped structure, so that the structural stability of the positioning sleeve 6 is improved, and the sliding or deformation of the positioning sleeve in the use process is effectively avoided. Meanwhile, the outer convex part 9 and the inner concave part 10 with special structures can bear larger load, which is beneficial to increasing the durability and the reliability of the positioning sleeve 6, thereby realizing the rapid support and fixation of the pipe 2. In addition, the locating sleeve 6 can accurately locate the central locating rod 5 to a designated position, so that the central axis of the inner wall of the pipe 2 is coaxial with the rotation axis of the central locating rod 5, and the locating precision is high.
As another embodiment, the outer protrusions 9 of adjacent positioning sleeves 6 are mated with the inner recesses 10.
The adjacent positioning sleeves 6 can be mutually clamped and matched with the inner concave parts 10 through the outer convex parts 9 at the corresponding positions. Because the longitudinal sections of the outer convex part 9 and the inner concave part 10 of the positioning sleeve 6 are of wedge-shaped structures, plastic deformation is easy to occur under the tensile force action of the central positioning rod 5, so that the outer wall of the positioning sleeve 6 outwards extrudes the pipe 2, and the inner wall of the positioning sleeve 6 inwards extrudes the central positioning rod 5, thereby realizing that the rotation axis of the central positioning rod 5 is coaxial with the central axis of the inner wall of the pipe 2 while the positioning mechanism 1 and the pipe 2 are locked and fixed, and further guaranteeing the measurement accuracy. Meanwhile, the outer convex portions 9 and the inner concave portions 10 which are of wedge-shaped structures in longitudinal sections are clamped between the positioning sleeves 6 to form a plurality of positioning points, so that the reliability of interconnection between the positioning sleeves 6 is improved.
As another embodiment, the concave portions 10 of the adjacent positioning sleeves 6 are symmetrically arranged in the vertical direction.
By the above arrangement, the overall structural stability and structural rigidity of the positioning mechanism 1 are facilitated to be enhanced.
The end part of the central positioning rod 5, which is positioned in the pipe 2, is provided with a limiting part 11 for limiting the positioning sleeve 6.
The locating sleeve 6 is limited through the limiting part 11, so that the locating sleeve 6 is effectively prevented from sliding and falling off on the central locating rod 5, and the connection stability between the locating sleeve 6 and the central locating rod 5 is further improved. Meanwhile, the positioning sleeve 6 is facilitated to be positioned, the positioning sleeve 6 is tightly contacted with the pipe 2, and the positioning sleeve 6 is further promoted to be guided more accurately and positioned more accurately.
The driving mechanism 3 comprises a rolling assembly 12 positioned between the positioning sleeve 6 and the tightening handle 7, and a rotating seat 13 is sleeved outside the rolling assembly 12. The outside of the rotating seat 13 is fixedly connected with a supporting seat 14, and the supporting seat 14 is axially parallel to the pipe 2.
Through the rolling component 12 which is arranged inside the rotating seat 13 and sleeved on the central positioning rod 5 and the supporting seat 14 which is arranged outside the rotating seat 13 are cooperatively matched, the measuring mechanism 4 fixed on the supporting seat 14 can be driven by the rolling component 12 to rotate along the outer wall of the pipe 2, and 360-degree omnibearing measurement on the outer wall of the pipe 2 is realized. The accuracy and the reliability of the detection data result are effectively improved, the measurement error is reduced, and the detection efficiency is effectively improved. In addition, the 360-degree omnibearing measurement mode is adopted to replace complex clamping operation, so that the operation steps in the measurement process are simplified, the need of multiple repositioning operations in the measurement process is effectively avoided, and the measurement efficiency is further improved.
The rolling assembly 12 is formed by combining a plurality of rolling bearings 15 sleeved outside the centering rod 5.
As another embodiment, the rolling assembly 12 is composed of a plurality of rolling bearings 15 with an accuracy class standard of ISO class P4 sleeved outside the centering rod 5.
The rolling bearing 15 has a low friction coefficient, a high rotation speed and low noise, which contributes to improving the operation efficiency of the driving assembly and prolonging the service life thereof.
The measuring mechanism 4 comprises a dial indicator 16 vertically arranged on the supporting seat 14, the dial indicator 16 comprises a gauge head 17 positioned above the supporting seat 14, and further comprises a probe 18 penetrating through the supporting seat 14 and propped against the outer wall of the pipe 2.
As another embodiment, the accuracy of dial gauge 16 is 0.001mm.
The dial gauge 16 is a high-precision measuring tool, and can accurately measure small dimensional changes, so that real-time monitoring of the outer wall of the pipe 2 is realized. The design of the supporting seat 14 is favorable for improving the supporting stability of the measuring mechanism 4, and the gauge head 17 and the probe 18 of the dial indicator 16 are kept in a state perpendicular to the outer wall of the pipe 2, so that the dial indicator 16 is effectively prevented from moving or shaking, and the accuracy of measured data is further improved.
As another embodiment, the gauge head 17 of the dial gauge 16 is made of Polyetheretherketone (PEEK).
Through the arrangement, scratches on the surface of the pipe 2 by the dial indicator 16 are effectively avoided.
A locking screw 19 for fixing the position of the probe 18 is arranged on the supporting seat 14 near the probe 18.
The position of the probe 18 is fixed through the locking screw 19, so that the structural stability is enhanced, and meanwhile, the probe 18 is effectively prevented from shifting or falling off in the detection process, and the measurement accuracy and the detection safety are improved.
The center positioning rod 5 is in threaded connection with the tightening handle 7.
The center locating rod 5 is in threaded connection with the tightening handle 7, so that looseness of the center locating rod 5 and the tightening handle 7 in the measuring process is effectively prevented, and the connection stability between the center locating rod 5 and the tightening handle 7 is improved. At the same time, the position of the center positioning rod 5 is convenient to adjust by tightening the handle 7, thereby realizing more accurate positioning.
The positioning sleeve 6 is made of nylon.
The positioning sleeve 6 is made of nylon materials which do not contain harmful elements such as fluorine, chlorine, sulfur, lead and the like, so that the precision tube 2 is effectively prevented from being polluted. Meanwhile, as the nylon material has high density, smooth surface, wear resistance, easy processing and difficult expansion and contraction deformation, the phenomena of scratch, bruise and the like on the surface of the precision pipe 2 are avoided while the supporting and positioning are effectively ensured. Thereby reaching the high standard requirements of pollution prevention and surface protection of the precision tube 2 and further improving the product quality of the precision tube 2.
The specific application method of the precision pipe 2 coaxiality measuring device comprises the following steps:
the locking screw 19 for fixing the position of the probe 18 is first loosened and the gauge head 17 is removed. Then the tightening handle 7 sleeved on the central positioning rod 5 is loosened, the white nylon positioning sleeve 6 which is arranged on the central positioning rod 5 in advance is inserted into the measured pipe 2, and then the tightening handle 7 is gradually tightened, so that the central positioning rod 5 is slowly tightened and moves from the inside of the measured pipe 2 to the outside of the measured pipe 2 along the axial direction of the measured pipe 2. The center positioning rod 5 drives the positioning sleeve 6 to move together until the positioning sleeve 6 is abutted against the rotating seat 13, so that the rotation axis of the center positioning rod 5 is coaxial with the central axis of the inner wall of the measured pipe 2 while the positioning mechanism 1 and the measured pipe 2 are locked and fixed, and the measurement accuracy is further ensured.
After the pipe 2 to be measured is fixed, a dial indicator 16 is arranged on the supporting seat 14, so that the probe 18 is abutted against the outer wall of the pipe 2 to be measured, then a locking screw 19 is fixed, and the numerical value displayed on the adjusting gauge head 17 is reset to zero. Under the action of the rolling assembly 12 combined by the rolling bearings 15, the rotating seat 13 drives the dial indicator 16 to rotate 360 degrees around the outer wall of the measured pipe 2 together, so that 360-degree omnibearing measurement of the dial indicator 16 on the outer wall of the pipe 2 is realized. And then the coaxiality of the probe 18 is obtained according to the numerical value difference displayed by the gauge outfit 17 at different contact points of the probe 18 and the outer wall of the measured pipe 2. If the inner and outer walls of the pipe 2 to be measured are not concentric or the wall thickness is uneven, the gauge head 17 on the dial gauge 16 shows that numerical fluctuation will occur. The larger the fluctuation of the dimension value measured by the dial gauge 16 is, the worse the coaxiality of the inner wall and the outer wall of the measured pipe 2 is.
The foregoing is only illustrative of the preferred embodiments and principles of the present invention, and changes in specific embodiments will occur to those skilled in the art upon consideration of the teachings provided herein, and such changes are intended to be included within the scope of the invention as defined by the claims.

Claims (10)

1. The utility model provides a precision tube coaxiality measuring device which is characterized in that includes:
the positioning mechanism (1) is inserted into the pipe (2) from one end of the pipe (2) and is coaxially arranged with the inner wall of the pipe (2);
the driving mechanism (3) is rotationally connected with the positioning mechanism (1);
and the measuring mechanism (4) is arranged on the driving mechanism (3), and one end of the measuring mechanism (4) is mutually abutted with the outer wall of the pipe (2), so that the measuring mechanism (4) can be driven by the driving mechanism (3) to rotate along the outer wall of the pipe (2).
2. The precision tube coaxiality measuring device according to claim 1, wherein the positioning mechanism (1) comprises a central positioning rod (5) which is inserted into the tube (2) and can move back and forth along the tube (2) axially, a plurality of positioning sleeves (6) are sleeved on the part, located inside the tube (2), of the central positioning rod (5), and a tightening handle (7) is sleeved on the part, located outside the tube (2), of the central positioning rod (5).
3. The precision tube coaxiality measuring device according to claim 2, wherein the positioning sleeve (6) comprises a positioning sleeve main body (8), an outer circular truncated cone-shaped protrusion (9) is arranged at one side end part of the positioning sleeve main body (8), and an inner concave part (10) matched with the shape of the outer protrusion (9) is arranged at the other side end part of the positioning sleeve main body (8).
4. The precision tube coaxiality measuring device according to claim 2, wherein the end part of the central positioning rod (5) positioned in the tube (2) is provided with a limiting part (11) for limiting the positioning sleeve (6).
5. The precision tube coaxiality measuring device according to claim 2, wherein the driving mechanism (3) comprises a rolling assembly (12) arranged between the positioning sleeve (6) and the tightening handle (7), a rotating seat (13) is sleeved outside the rolling assembly (12), a supporting seat (14) is fixedly connected outside the rotating seat (13), and the supporting seat (14) and the tube (2) are axially arranged in parallel.
6. The precision tube coaxiality measuring device according to claim 5, wherein the rolling assembly (12) is formed by combining a plurality of rolling bearings (15) sleeved outside the center positioning rod (5).
7. The precision tube coaxiality measuring device according to claim 5, wherein the measuring mechanism (4) comprises a dial indicator (16) vertically arranged on the supporting seat (14), the dial indicator (16) comprises a gauge head (17) positioned above the supporting seat (14), and further comprises a probe (18) penetrating through the supporting seat (14) and propped against the outer wall of the tube (2).
8. The precision tubing coaxiality measuring device according to claim 7, wherein a locking screw (19) for fixing the position of the probe (18) is arranged on the supporting seat (14) close to the probe (18).
9. The precision tube coaxiality measuring device according to claim 2, wherein the center positioning rod (5) is in threaded connection with the tightening handle (7).
10. The precision tube coaxiality measuring device according to claim 2, 3 or 5, wherein the positioning sleeve (6) is made of nylon.
CN202310739356.6A 2023-06-21 2023-06-21 Accurate tubular product axiality measuring device Pending CN117006927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310739356.6A CN117006927A (en) 2023-06-21 2023-06-21 Accurate tubular product axiality measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310739356.6A CN117006927A (en) 2023-06-21 2023-06-21 Accurate tubular product axiality measuring device

Publications (1)

Publication Number Publication Date
CN117006927A true CN117006927A (en) 2023-11-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310739356.6A Pending CN117006927A (en) 2023-06-21 2023-06-21 Accurate tubular product axiality measuring device

Country Status (1)

Country Link
CN (1) CN117006927A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117647171A (en) * 2024-01-30 2024-03-05 中交一公局集团有限公司 Method and device for positioning central axis of cable-stayed bridge cable guide pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117647171A (en) * 2024-01-30 2024-03-05 中交一公局集团有限公司 Method and device for positioning central axis of cable-stayed bridge cable guide pipe
CN117647171B (en) * 2024-01-30 2024-04-02 中交一公局集团有限公司 Method and device for positioning central axis of cable-stayed bridge cable guide pipe

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