CN110260778B - Chamfering measurement method and device based on electromagnetic principle - Google Patents
Chamfering measurement method and device based on electromagnetic principle Download PDFInfo
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- CN110260778B CN110260778B CN201910653613.8A CN201910653613A CN110260778B CN 110260778 B CN110260778 B CN 110260778B CN 201910653613 A CN201910653613 A CN 201910653613A CN 110260778 B CN110260778 B CN 110260778B
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- 238000000691 measurement method Methods 0.000 title claims description 4
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 21
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
Classifications
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides a chamfer measuring device based on an electromagnetic principle, which comprises: a positioning and driving mechanism for rotating the rotary body part along the axis of the rotary body part at a fixed position; the electromagnetic sensor is arranged above the chamfer of the rotary part correspondingly, and is used for measuring the distance between the electromagnetic sensor and the chamfer of the rotary part, converting the distance information into corresponding electric signals and sending the electric signals to the signal processing device; a bracket for fixing the electromagnetic sensor; a magnetic field excitation means for providing excitation to the electromagnetic sensor; and the signal processing device is used for receiving and processing the electric signals emitted by the electromagnetic sensor. The invention adopts a non-contact detection mode, has high detection speed and can carry out automatic detection.
Description
Technical Field
The invention relates to the field of measuring instruments in manufacturing industry, in particular to a chamfer angle detection method and a measuring instrument for a revolving body part made of a conductive material.
Background
In the field of machining, chamfering is a very common and important procedure, with multiple functions. For example, people related to the scratch of sharp corners can be avoided, the stress concentration of the part can be reduced, the strength of the part is enhanced, and a guiding function can be provided during assembly. The chamfer may deviate from the design size or the depth unevenness during processing, which has a large influence on the quality of the part, and therefore, it is necessary to measure the chamfer of the part.
At present, the chamfering measurement method is commonly used as mechanical methods such as a vernier caliper and a chamfering contour detector of a chamfering gauge, the method completely relies on manual measurement and reading, a measuring tool needs to contact a part to be measured, damage can be caused to a high-quality processing surface, the detection efficiency is low, and the method is easy to be interfered by artificial factors.
Chinese patent CN101036045A describes a chamfer measuring method based on a light reflection method, the basic idea is to irradiate light horizontally onto a chamfer to be measured between two vertical planes, and the light irradiated onto the chamfer to be measured travels a bright light band after being reflected by 90 °; the width of the light band is measured by acquiring a bright light band image, and the width of the light band corresponds to the R value of the chamfer to be measured. The device of the method is complex, a light source emitter and a camera are needed, the obtained image is needed to be analyzed and processed, and the operation amount is large. The optical method has higher requirements on the surface cleanliness and surface quality of the part, and is difficult to detect more greasy dirt on the surface and process the chamfer of the part with complex surface. In addition, the optical method has high requirements on the measuring environment and is easy to be interfered by the ambient light.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a chamfer measuring method and device based on an electromagnetic principle, which adopt a non-contact detection mode, have high detection speed and can perform automatic detection. The technical scheme adopted by the invention is as follows:
A chamfer measuring device based on electromagnetic principles, comprising:
The positioning and driving mechanism enables the revolving body part to rotate along the axis of the revolving body part at a fixed position;
the electromagnetic sensor is arranged above the chamfer of the rotary part correspondingly, and is used for measuring the distance between the electromagnetic sensor and the chamfer of the rotary part, converting the distance information into corresponding electric signals and transmitting the electric signals to the signal processing device;
A bracket for fixing the electromagnetic sensor;
magnetic field excitation means for providing excitation to the electromagnetic sensor;
And the signal processing device is used for receiving and processing the electric signals emitted by the electromagnetic sensor.
Further, the positioning and driving mechanism comprises a double roller and a driving device for driving the driving roller in the double roller to rotate; the double rollers comprise two rollers which are arranged in parallel; two rollers are mounted on the platform at a distance.
Further, the bracket stands outside one end of the double rollers and is aligned to the middle of the two rollers;
An electromagnetic sensor mounted on the bracket is positioned above the middle of the double rollers.
Further, in the double rollers, one or two rollers serve as driving rollers, and the driving device is used for driving the driving rollers to rotate.
Further, the stand can adjust the height of the electromagnetic sensor.
Further, the electromagnetic sensor adopts an eddy current sensor, and the eddy current sensor comprises an exciting coil, a receiving differential coil and a receiving detection coil; the receiving differential coil, the exciting coil and the receiving detection coil are arranged along the axis direction of the part to be detected; the exciting coil is positioned between the receiving differential coil and the receiving detection coil, the receiving detection coil is positioned right above the chamfer of the part, and the receiving differential coil is positioned at the other side of the exciting coil and is opposite to the peripheral surface of the part; the receiving differential coil is connected with the receiving detection coil in a differential mode and then connected with the signal processing device; the exciting coil is connected with a magnetic field exciting device.
Furthermore, when the part to be measured rotates, the eddy current sensor scans the whole circumference of the chamfer of the part to be measured, the magnetic field excitation device drives the excitation coil to generate an alternating magnetic field, and the part to be measured generates local eddy current near the chamfer in the alternating magnetic field; the receiving detection coil senses a long distance at a position with a deep chamfer angle, senses a short distance at a position with a shallow chamfer angle, and does not sense a distance change due to the fact that the receiving differential coil corresponds to the peripheral surface of the part; the differential signals of the receiving differential coil and the receiving detection coil are output to a signal processing device to process and judge the signals.
A chamfer measuring method based on electromagnetic principle comprises the following steps:
the electromagnetic sensor is arranged above the chamfer of the rotary part, the rotary part is driven to rotate along the axis of the rotary part, when the chamfer of the rotary part is uneven, the distance between the electromagnetic sensor and the chamfer of the rotary part changes, the electromagnetic sensor converts the information of the distance change between the electromagnetic sensor and the chamfer of the rotary part into an electric signal, the electric signal is in direct proportion to the change amount of the magnetic field sensed by the electromagnetic sensor, and finally the electric signal is transmitted to the signal processing device for processing and judging.
Further, the electromagnetic sensor adopts an eddy current sensor, and the eddy current sensor comprises an exciting coil, a receiving differential coil and a receiving detection coil; the receiving differential coil, the exciting coil and the receiving detection coil are arranged along the axis direction of the part to be detected; the exciting coil is positioned between the receiving differential coil and the receiving detection coil, the receiving detection coil is positioned right above the chamfer of the part, and the receiving differential coil is positioned at the other side of the exciting coil and is opposite to the peripheral surface of the part; the receiving differential coil is connected with the receiving detection coil in a differential mode and then connected with the signal processing device; the exciting coil is connected with a magnetic field exciting device;
when the part to be measured rotates, the eddy current sensor scans the chamfer angle of the part to be measured in a full-circle mode, the magnetic field excitation device drives the excitation coil to generate an alternating magnetic field, and the part to be measured generates local eddy current near the chamfer angle in the alternating magnetic field; the receiving detection coil senses a long distance at a position with a deep chamfer angle, senses a short distance at a position with a shallow chamfer angle, and does not sense a distance change due to the fact that the receiving differential coil corresponds to the peripheral surface of the part; the differential signals of the receiving differential coil and the receiving detection coil are output to a signal processing device to process and judge the signals.
The invention has the advantages that:
1) The electromagnetic ranging principle detects the size of the chamfer, realizes non-contact detection, can perform automatic detection, and avoids human factor interference in manual detection.
2) The structure of the differential output of the receiving coil is applied to the chamfer measuring device, and the differential output of the signal of the receiving coil can reduce common mode noise in a detection environment and improve detection precision.
3) The bracket can realize chamfer detection of parts with different specifications matched with the instrument.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a side view of the structure of the present invention.
FIG. 3 is a schematic diagram of an embodiment of an electromagnetic sensor of the present invention.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
Embodiment one;
As shown in fig. 1, a chamfer measuring device based on electromagnetic principle includes: the device comprises a platform 4, a double roller 2 for positioning a part 1 to be detected, a motor 3 for driving the double roller 2 to rotate, an eddy current sensor 5 for detecting the chamfer angle of the part, a bracket 6 for installing the eddy current sensor 5 and capable of being adjusted in an upgrading mode;
In the embodiment, the part 1 to be measured is a bar-shaped part with two chamfered edges, and the part 1 to be measured is placed on the double rollers 2 for positioning; the double roller 2 comprises two rollers 2-1 and 2-2 which are arranged in parallel; the two rollers 2-1, 2-2 are mounted on the platform 4 at a distance; the bracket 6 is also arranged on the platform 4, stands on the outer side of one end of the double roller and is aligned with the middle of the two rollers 2-1 and 2-2; the bracket 6 comprises a vertical frame 6-2, a cross arm 6-1 and a locking screw 6-3, wherein the cross arm 6-1 is fixed on the vertical frame 6-2 through the locking screw 6-3 and extends to the upper middle of the double roller; the vortex sensor 5 is arranged on the cross arm 6-1; loosening a locking screw 6-3 on the bracket 6, adjusting the height of the cross arm 6-1 to enable the bottom of the eddy current sensor 5 to be 0.05-2 mm higher than the top end of the part 1 to be tested, and tightening the locking screw 6-3; the height of the vortex sensor 5 is adjustable, so that the requirements for detecting revolving body parts with different sizes are met;
One or two rollers in the double rollers are used as driving rollers; when the driving roller is only one, the rotating shaft of the motor 3 can be directly connected with the rotating shaft of the driving roller; when the number of the driving rollers is two, the motor 3 can drive the two driving rollers through two independent transmission mechanisms respectively, and the transmission mechanisms comprise a gear set transmission mechanism or a chain sprocket transmission mechanism and the like;
As shown in fig. 3, the eddy current sensor 5 includes an exciting coil 5-1, a receiving differential coil 5-2, and a receiving detecting coil 5-3; the receiving differential coil 5-2, the exciting coil 5-1 and the receiving detection coil 5-3 are arranged along the axis direction of the part to be tested; the exciting coil 5-1 is positioned between the receiving differential coil 5-2 and the receiving detection coil 5-3, the receiving detection coil 5-3 is positioned right above the chamfer of the part, and the receiving differential coil 5-2 is positioned at the other side of the exciting coil 5-1 and is opposite to the peripheral surface of the part; the receiving differential coil 5-2 and the receiving detection coil 5-3 are connected in a differential mode and then connected with a signal processing device; the exciting coil 5-1 is connected with a magnetic field exciting device;
When the motor 3 is electrified, the motor rotates to drive the double rollers 2 to rotate, and the double rollers 2 rotate to drive the part 1 to be tested to rotate; the eddy current sensor 5 scans the chamfer angle of the part 1 to be tested in a full-circle mode, the magnetic field excitation device drives the excitation coil 5-1 to generate an alternating magnetic field, and the part 1 to be tested generates local eddy current near the chamfer angle in the alternating magnetic field; the receiving detection coil 5-3 senses a long distance at a position with a deep chamfer angle and senses a short distance at a position with a shallow chamfer angle, and the receiving differential coil 5-2 does not sense a distance change due to the corresponding part peripheral surface; the differential signals of the reception differential coil 5-2 and the reception detection coil 5-3 are output to a signal processing device to perform signal processing and judgment.
Embodiment two; the embodiment is basically the same as the first embodiment, except that the positioning mechanism in the embodiment is changed from a double-roller chuck to a three-jaw chuck, the three-jaw chuck is used for clamping the revolving body part, and the driving mechanism drives the three-jaw chuck to rotate, so that the part also rotates.
Embodiment three; the present embodiment is basically the same as the first embodiment except that the electromagnetic sensor in the present embodiment is changed from an eddy current sensor to a magnetic flux measuring type displacement sensor, and the chamfer distance detecting function can be also realized.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (1)
1. The chamfering measurement method based on the electromagnetic principle is characterized by comprising the following steps of:
The electromagnetic sensor is arranged above the chamfer of the rotary part, the rotary part is driven to rotate along the axis of the rotary part, when the chamfer of the rotary part is uneven, the distance between the electromagnetic sensor and the chamfer of the rotary part changes, the electromagnetic sensor converts the information of the distance change between the electromagnetic sensor and the chamfer of the rotary part into an electric signal, the electric signal is in direct proportion to the change amount of the magnetic field sensed by the electromagnetic sensor, and finally the electric signal is transmitted to the signal processing device for processing and judging:
the electromagnetic sensor adopts an eddy current sensor, and the eddy current sensor comprises an exciting coil, a receiving differential coil and a receiving detection coil; the receiving differential coil, the exciting coil and the receiving detection coil are arranged along the axis direction of the part to be detected; the exciting coil is positioned between the receiving differential coil and the receiving detection coil, the receiving detection coil is positioned right above the chamfer of the part, and the receiving differential coil is positioned at the other side of the exciting coil and is opposite to the peripheral surface of the part; the receiving differential coil is connected with the receiving detection coil in a differential mode and then connected with the signal processing device; the exciting coil is connected with a magnetic field exciting device;
when the part to be measured rotates, the eddy current sensor scans the chamfer angle of the part to be measured in a full-circle mode, the magnetic field excitation device drives the excitation coil to generate an alternating magnetic field, and the part to be measured generates local eddy current near the chamfer angle in the alternating magnetic field; the receiving detection coil senses a long distance at a position with a deep chamfer angle, senses a short distance at a position with a shallow chamfer angle, and does not sense a distance change due to the fact that the receiving differential coil corresponds to the peripheral surface of the part; the differential signals of the receiving differential coil and the receiving detection coil are output to a signal processing device to process and judge the signals.
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| CN201910653613.8A CN110260778B (en) | 2019-07-19 | 2019-07-19 | Chamfering measurement method and device based on electromagnetic principle |
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| CN201910653613.8A CN110260778B (en) | 2019-07-19 | 2019-07-19 | Chamfering measurement method and device based on electromagnetic principle |
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