CN113188423B - Positioning device and system for detecting symmetry degree of radial hole of shaft part - Google Patents
Positioning device and system for detecting symmetry degree of radial hole of shaft part Download PDFInfo
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- CN113188423B CN113188423B CN202110335567.4A CN202110335567A CN113188423B CN 113188423 B CN113188423 B CN 113188423B CN 202110335567 A CN202110335567 A CN 202110335567A CN 113188423 B CN113188423 B CN 113188423B
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- positioning
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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
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a positioning device and a detection system for detecting the symmetry of a radial hole of a part for a shaft. Comprises a first positioning block, a second positioning block and two positioning pins and pins; the surface of the first positioning block is provided with a plane A1 vertical to the axial direction and a side plane parallel to the axial direction, meanwhile, the first positioning block is provided with a mounting hole and two positioning holes which are axially arranged, the two positioning holes are positioned at two sides of the mounting hole, and meanwhile, the planes of the central axes of the two positioning blocks are parallel to the side plane; the surface of the second positioning block is provided with a bottom positioning plane B1, a positioning plane B2 and a positioning plane C, the positioning plane B2 and the positioning plane C are mutually perpendicular, wherein the plane A1 is jointed with the positioning plane B2, and the side plane is jointed with the positioning plane C; the two locating pins are respectively arranged in the two locating holes, the part to be measured is arranged in the mounting hole during measurement, the pin penetrates through the radial hole to be measured to be arranged, and two ends of the pin are attached to the locating pins on two sides to be located and fixed. The device has reliable six-point positioning and simple and accurate measurement.
Description
Technical Field
The invention relates to a tool for measuring radial holes of shaft parts, in particular to a positioning device for detecting the symmetry of radial holes of shaft parts and a corresponding detection system.
Background
In the manufacturing and using processes of the precision product, the processing requirements on each part are relatively high, and particularly the shape, position and size precision of the key part often determines the overall performance of the product. And the measurement of the shape and position size needs to be repeated and positioned accurately, and the standard is consistent.
For example, the shaft part is structurally characterized by radial holes, and has high requirements on the position degree of the holes, such as a small-module gear transmission shaft. The measurement of the radial hole position is usually carried out by using the existing measuring instrument: one is to adopt three-coordinate measurement, although the measurement is accurate, the equipment price is high, and the measurement cost is high; and the other is that a projector is adopted for measurement, so that a special tool with higher precision is required to ensure that the radial hole is perpendicular to the measurement platform to perform measurement, the measurement difficulty is high, the possibility of systematic errors is high, the measurement cost is high, and the measurement effect is not ideal.
Disclosure of Invention
In order to overcome the defects or shortcomings in the prior art, the invention provides a positioning device for detecting the symmetry of radial holes of parts for shafts.
For this purpose, a positioning device for detecting the symmetry of a radial hole of a shaft component is provided, comprising:
the first positioning block is provided with a plane A1 perpendicular to the axial direction and a side plane parallel to the axial direction on the surface; one end of the first positioning block, which is opposite to the plane A1, is provided with an axially-arranged mounting hole and two axially-arranged positioning holes, wherein the two positioning holes are positioned at two sides of the mounting hole, and the plane where the central axes of the two positioning holes are positioned is parallel to the side plane;
the two locating pins are respectively arranged in the two locating holes;
when the part to be measured is axially installed in the installation hole, the pin passes through the radial hole of the part to be measured and is installed, and two ends of the pin are attached to the two positioning pins;
the positioning block II is provided with a bottom positioning plane B1, a positioning plane B2 and a positioning plane C which are parallel to the bottom positioning plane on the surface of the positioning block II, the positioning plane B2 and the positioning plane C are mutually perpendicular, the positioning block I is placed on the positioning block II, the plane A1 is attached to the positioning plane B2, and meanwhile, the side plane is attached to the positioning plane C.
Preferably, a positioning surface D is set on the inner wall of the mounting hole, the positioning surface D is located between the two positioning holes, the plane where the positioning surface D is located is parallel to the plane where the central axes of the two positioning holes are located or the side plane, and meanwhile, the plane where the positioning surface D is located between the plane where the central axes of the two positioning holes are located and the plane where the side plane is located.
Optionally, a concave v-shaped groove is formed in the inner wall of the mounting hole, and the bottom surface of the v-shaped groove is the positioning surface D.
Further, a plane A2 opposite to and parallel to the plane A1 is further provided on a surface of the positioning block; the plane A2 is provided with an installation hole and two positioning holes, wherein the installation holes are formed in the axial direction, the positioning holes are formed in the axial direction, and the part, which is leaked out of the radial hole of the part to be tested, of the pin is attached to the plane A2.
Further, a fixing hole communicated with the mounting hole is formed in the first positioning block in the radial direction; and the device also comprises a compression screw which is arranged in the fixing hole.
Further, the first positioning block is a cylinder which is partially cut along the axial direction.
Further, the axial section of the positioning block II is L-shaped.
The invention also provides a system for detecting the symmetry degree of the radial hole of the shaft component. Therefore, the detection system provided by the invention comprises the measuring tool and the positioning device, wherein the positioning block II of the positioning device is fixedly arranged, the measuring tool is fixedly arranged relative to the positioning block II, the measuring tool is used for measuring the relative variation of the maximum measured value of the front and rear times, the maximum measured value of the front time is the maximum measured value displayed when the measuring tool contacts the outer side surface of the part to be measured when the part to be measured is axially arranged in the mounting hole, and the maximum measured value of the rear time is the maximum measured value displayed after rotating 180 degrees relative to the part to be measured of the front time.
Specifically, the measuring tool is a dial indicator.
Further, the detection system of the invention further comprises a support, wherein the support is fixedly arranged relative to the second positioning block, and a movable measuring tool mounting structure is arranged on the support and is used for mounting the measuring tool.
The beneficial effects are that:
the device has reliable six-point positioning, namely X, Y, Z coordinates and rotation positioning of each coordinate axis, and the measurement becomes simple and easy to implement and the reading is accurate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic structural reference diagram of a first positioning block;
FIG. 3 is a top reference schematic view of a first positioning block;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is a cross-sectional view A-A of FIG. 3;
FIG. 6 is a schematic diagram of a second positioning block;
fig. 7 is a reference schematic diagram of the actual use state of the device of the present invention.
Detailed Description
Unless specifically stated otherwise, the terms or methods herein are understood or implemented according to the knowledge or well-known methods of one of ordinary skill in the relevant art.
The terms of axial direction, radial direction and the like or azimuth are consistent with the corresponding directions or azimuth in the drawings, wherein the axial direction is also the extending direction of the part to be tested in the mounting hole, and the extending direction is perpendicular to the radial hole of the part to be tested; it should be noted that, the directions and orientations shown in the drawings do not limit the present invention only, and those skilled in the art make equivalent changes such as rotation, adjustment, etc. on the basis of the concept of the present invention are all within the scope of the present invention.
Examples:
referring to fig. 1, the positioning device of the present invention includes a first positioning block 3, a second positioning block 2, two positioning pins 4, and a pin (not shown in fig. 1); wherein: the surface of the first positioning block is provided with a plane A131 perpendicular to the axial direction and a side plane 33 parallel to the axial direction, meanwhile, one end of the first positioning block opposite to the plane A1 is provided with a mounting hole 31 and two positioning holes 32 which are axially formed, the two positioning holes 32 are positioned on two sides of the mounting hole 31, and the planes of the central axes of the two positioning blocks are parallel to the side plane 33;
the surface of the positioning block II 2 is provided with a bottom positioning plane B123, a positioning plane B221 and a positioning plane C22 which are parallel to the bottom positioning plane, the positioning plane B221 and the positioning plane C22 are mutually perpendicular, the positioning block I is placed on the positioning block II, the plane A1 is attached to the positioning plane B2, and the side plane is attached to the positioning plane C;
the two positioning pins are respectively arranged in the two positioning holes and partially leak outwards; when the part to be measured is installed in the installation hole, the pin is used for penetrating through the radial hole to be measured for installation, and two ends of the pin are attached to the positioning pins on two sides.
During measurement, referring to fig. 7, the second positioning block is horizontally placed to form a positioning reference, and the first positioning block is placed on the second positioning block according to the scheme; the measured shaft parts are axially arranged in the mounting holes and are attached to the inner side surface of the mounting holes, pins are inserted into radial holes on the measured shaft parts, the pins are tightly matched with the holes, and the pins are attached to positioning pins on two sides so as to position and fix the measured shaft parts;
then, a measuring tool 5 fixedly arranged at the side, such as a dial indicator, is used for contacting the surface of the part to be measured, the first positioning block is slightly slid left and right to drive the part to be measured to slide, the highest measuring point is found out, and the numerical value is recorded; the same method is adopted, the measured piece is rotated 180 degrees to measure the precision of the measured piece again and record the numerical value; and comparing the two measurement data to obtain the accurate value of the radial hole symmetry of the part for the measured shaft. The corresponding planes or positioning surfaces among the parts are attached, so that when the positioning block I drives the tested piece to slide, the position deviation is not caused to generate errors. In addition, the second positioning block needs to be ensured to be fixed during measurement, and displacement is not allowed; meanwhile, the measuring tool such as the percentage angle and the position are consistent, and the position of the dial indicator is not allowed to shake or change. In a more specific scheme, during measurement, the second positioning block can be placed on the horizontal table 1 and used in a matched mode to ensure accurate positioning.
In a more specific scheme, as shown in fig. 1, the measuring tool 5 is fixedly mounted beside the positioning device through a bracket 6, and a movable measuring tool mounting structure is arranged on the bracket, so that the angle and the position of the measuring tool can be conveniently adjusted during measurement.
In some schemes, a plane A2 which is opposite to and parallel to the plane A1 is arranged on one surface of the positioning block, a mounting hole and two positioning holes are arranged on the plane A2, and during measurement, the pin leakage part is stuck to the plane A2, so that the pin leakage part can be positioned more accurately in the measurement process.
In some schemes, for better positioning effect, the inner wall of the mounting hole is provided with a positioning surface D, the positioning surface D is positioned between two positioning controls, meanwhile, the plane of the positioning surface D is parallel to the plane of the side plane 33 or the central axes of the two positioning holes, and the plane of the positioning surface D is positioned between the plane of the side plane and the plane of the central axes of the two positioning holes. In a specific scheme, as shown in fig. 2, the mounting hole may be provided with a concave V-shaped groove, and the geometric bottom surface of the V-shaped groove is a positioning surface D. Therefore, when the part to be measured is mounted in the mounting hole, especially when the aperture of the mounting hole is large, the part to be measured can be positioned by being attached to the positioning surface.
In a further scheme, especially when the aperture of the mounting hole is too large, the part to be tested in the mounting hole needs to be fixed, correspondingly, a fixing hole 36 is formed in the side wall of the first positioning block along the radial direction (i.e. perpendicular to the axial direction), and when the part to be tested is mounted in the mounting hole, the part to be tested is fixed by mounting a compression screw 7 in the positioning hole 36.
In some embodiments, the positioning block one 3 is in a cylindrical shape with a part cut away along the axial direction, and as shown in fig. 2, the surfaces of the corresponding parts are a plane A1, a plane A2 and a side plane respectively. The section shape of the second positioning block 2 is L-shaped, and the corresponding surfaces are a positioning plane B and a positioning plane C.
The radial holes shown in table 1 are measured by adopting the measuring system of the invention, the requirement of symmetry degree of each radial hole relative to the axis and measured data are recorded in the following table 1, wherein two indication values in the table are respectively the numerical values read on a dial indicator, and the two indication values are the test indication values after the primary indication value test azimuth rotates 180 degrees.
TABLE 1
The foregoing disclosure is only a few specific embodiments of the present patent, but the present design is not limited thereto and any variations that would occur to one skilled in the art should fall within the scope of the present patent.
Claims (10)
1. The utility model provides a positioner is used in radial hole symmetry detection of spare part for axle which characterized in that includes:
the first positioning block is provided with a plane A1 perpendicular to the axial direction and a side plane parallel to the axial direction on the surface; one end of the first positioning block, which is opposite to the plane A1, is provided with an axially-arranged mounting hole and two axially-arranged positioning holes, wherein the two positioning holes are positioned at two sides of the mounting hole, and the plane where the central axes of the two positioning holes are positioned is parallel to the side plane;
the two locating pins are respectively arranged in the two locating holes;
when the part to be measured is axially installed in the installation hole, the pin passes through the radial hole of the part to be measured and is installed, and two ends of the pin are attached to the two positioning pins;
the positioning device comprises a positioning block II, wherein the surface of the positioning block II (2) is provided with a bottom positioning plane B1, a positioning plane B2 and a positioning plane C which are parallel to the bottom positioning plane, the positioning plane B2 and the positioning plane C are mutually perpendicular, the positioning block I is placed on the positioning block II, the plane A1 is attached to the positioning plane B2, and meanwhile, the side plane is attached to the positioning plane C.
2. The positioning device for detecting the symmetry of the radial hole of the shaft component according to claim 1, wherein a positioning surface D is arranged on the inner wall of the mounting hole, the positioning surface D is positioned between the two positioning holes, the plane of the positioning surface D is parallel to the plane of the central axes of the two positioning holes or the side plane, and the plane of the positioning surface D is positioned between the plane of the central axes of the two positioning holes and the plane of the side plane.
3. The positioning device for detecting the radial hole symmetry of a shaft component according to claim 2, wherein a concave v-shaped groove is formed in the inner wall of the mounting hole, and the bottom surface of the v-shaped groove is the positioning surface D.
4. The positioning device for detecting the radial hole symmetry of the shaft component according to claim 1, wherein a plane A2 which is opposite to and parallel to the plane A1 is further arranged on one surface of the positioning block; the plane A2 is provided with an installation hole and two positioning holes, wherein the installation holes are formed in the axial direction, the positioning holes are formed in the axial direction, and the part, which is leaked out of the radial hole of the part to be tested, of the pin is attached to the plane A2.
5. The positioning device for detecting the symmetry of a radial hole of a shaft component according to claim 1, wherein a fixing hole communicated with the mounting hole is formed in the first positioning block in the radial direction; and the device also comprises a compression screw which is arranged in the fixing hole.
6. The positioning device for detecting the symmetry of a radial hole of a shaft component according to claim 1, wherein the first positioning block is a cylinder which is partially cut in the axial direction.
7. The positioning device for detecting the symmetry of a radial hole of a shaft component according to claim 1, wherein the second axial section of the positioning block is L-shaped.
8. The system is characterized by comprising a measuring tool and a positioning device according to any one of claims 1 to 7, wherein the positioning device is fixedly arranged on a positioning block II, the measuring tool is fixedly arranged relative to the positioning block II and is used for measuring the relative variation of the maximum measured value of two times before and after, the maximum measured value of the former time is the maximum measured value displayed when the measuring tool contacts the outer side surface of the part to be measured when the part to be measured is axially arranged in an installation hole, and the measured value of the latter time is the maximum measured value displayed after rotating 180 degrees relative to the measured value of the former time.
9. The shaft component radial bore symmetry detection system of claim 8, wherein the measurement tool is a dial gauge.
10. The system for detecting radial hole symmetry of shaft parts according to claim 8, further comprising a bracket fixedly arranged relative to the second positioning block, wherein a movable measuring tool mounting structure is provided on the bracket for mounting the measuring tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335567.4A CN113188423B (en) | 2021-03-29 | 2021-03-29 | Positioning device and system for detecting symmetry degree of radial hole of shaft part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335567.4A CN113188423B (en) | 2021-03-29 | 2021-03-29 | Positioning device and system for detecting symmetry degree of radial hole of shaft part |
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| CN113188423A CN113188423A (en) | 2021-07-30 |
| CN113188423B true CN113188423B (en) | 2023-05-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114750096B (en) * | 2022-06-09 | 2024-05-31 | 浙江长兴裕丰精密机械有限公司 | Clamp and method for assembling digital display dial indicator fixed grid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341466A (en) * | 2018-12-06 | 2019-02-15 | 中国航发贵州黎阳航空动力有限公司 | A kind of measuring device and method of hydraulic actuator bulk |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2464509C (en) * | 2008-10-17 | 2014-05-21 | Taylor Hobson Ltd | Surface measurement instrument and method |
| GB2478303B (en) * | 2010-03-02 | 2018-03-07 | Taylor Hobson Ltd | Surface measurement instrument and calibration thereof |
| CN201757636U (en) * | 2010-07-15 | 2011-03-09 | 嘉兴市易嘉机械有限公司 | Workpiece symmetry detection device |
| CN102865803A (en) * | 2012-09-24 | 2013-01-09 | 泰州市科进机电设备有限公司 | Detecting tool for lug of oil cylinder |
| CN104390575A (en) * | 2014-11-18 | 2015-03-04 | 常州新北区孟河大海灯具厂 | Radial pore symmetrical degree detecting device |
| CN110108194A (en) * | 2019-04-30 | 2019-08-09 | 广州雅新金属制品有限公司 | The measurement method of crankshaft symmetry |
| CN111076650B (en) * | 2019-11-22 | 2021-11-23 | 河南航天精工制造有限公司 | Tool for measuring symmetry of double-sided milling flat workpiece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341466A (en) * | 2018-12-06 | 2019-02-15 | 中国航发贵州黎阳航空动力有限公司 | A kind of measuring device and method of hydraulic actuator bulk |
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