CN111702659A - Cylindrical surface straightness detection device and detection method thereof, and centerless grinding machine - Google Patents
Cylindrical surface straightness detection device and detection method thereof, and centerless grinding machine Download PDFInfo
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- CN111702659A CN111702659A CN202010740762.0A CN202010740762A CN111702659A CN 111702659 A CN111702659 A CN 111702659A CN 202010740762 A CN202010740762 A CN 202010740762A CN 111702659 A CN111702659 A CN 111702659A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
- B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
- B24B49/045—Specially adapted gauging instruments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
- B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
Abstract
The disclosure relates to a cylindrical surface straightness detection device and a detection method thereof and a centerless grinding machine, wherein the cylindrical surface straightness detection device comprises: a workpiece support platform; at least two workpiece supports disposed on the workpiece support platform and configured to horizontally support a cylindrical workpiece under test; a sensor support platform; the sensor bracket is arranged on the sensor supporting platform; a plurality of displacement detection sensors mounted on the sensor holder and arranged along a length direction of the cylindrical workpiece to be measured, and configured to detect contour position parameters of the cylindrical workpiece to be measured; and the signal processing component is configured to receive the position parameters detected by the displacement detection sensor and convert the position parameters into straightness data of the cylindrical workpiece to be detected. The cylindrical surface straightness detection device reduces errors caused by movement of the displacement detection sensor, and improves straightness detection accuracy.
Description
Technical Field
The disclosure relates to the technical field of mechanical detection, in particular to a cylindrical surface straightness detection device and a detection method thereof, and a centerless grinding machine.
Background
With the progress of industry, in the field of cylindrical surface grinding, higher requirements are put forward on the form and position tolerance of the excircle of a product. In the existing grinding process, a special detection instrument is generally adopted for detecting roundness and straightness of a workpiece, and grinding parameters are corrected according to a detection result. The cylindrical surface with the diameter of more than 100mm and the length of more than 3000mm is widely applied to key parts of large-scale mechanical equipment. With the continuous deepening of high-quality development demand in the machinery industry, in recent years, the machinery industry has more and more paid attention to the improvement of the processing quality of cylindrical surfaces with the diameter of more than 100mm and the length of more than 3000mm, and generally a special detection instrument is required to be adopted for detecting the roundness and the straightness of a workpiece, however, the detection instrument has the condition of insufficient accuracy.
Disclosure of Invention
The inventor researches and finds that the related technology has the problem of insufficient detection accuracy.
In view of this, the present disclosure provides a cylindrical surface straightness detection apparatus, a detection method thereof, and a centerless grinder, which can improve detection accuracy.
Some embodiments of the present disclosure provide a cylindrical surface straightness detection apparatus for detecting the straightness of a cylindrical workpiece to be detected, which includes:
a workpiece support platform;
at least two workpiece supports disposed on the workpiece support platform and configured to horizontally support a cylindrical workpiece under test;
a sensor support platform;
the sensor bracket is arranged on the sensor supporting platform;
a plurality of displacement detection sensors mounted on the sensor holder and arranged along a length direction of the cylindrical workpiece to be measured, and configured to detect contour position parameters of the cylindrical workpiece to be measured; and
and the signal processing component is configured to receive the position parameters detected by the displacement detection sensor and convert the position parameters into straightness data of the cylindrical workpiece to be detected.
In some embodiments, the plurality of displacement detection sensors are arranged at equal intervals in a direction along the length of the cylindrical workpiece to be measured.
In some embodiments, the displacement detection sensor comprises a two-dimensional laser displacement sensor.
In some embodiments, the workpiece support comprises a V-shaped support or a U-shaped support.
In some embodiments, the position of the displacement detection sensor relative to the sensor mount is adjustable in both vertical and horizontal directions.
In some embodiments, the sensor bracket is provided with a positioning plate for positioning the displacement detection sensor, and the positioning plate is provided with a calibration mechanism fixedly arranged with the displacement detection sensor and configured to calibrate the plurality of displacement detection sensors to the same straight line.
In some embodiments, the calibration mechanism comprises a laser centering instrument or a laser tracker.
In some embodiments, the bottom of the sensor support platform is provided with an adjustable vibration isolation sizing block which is in contact with the ground support; the bottom of the workpiece supporting platform is provided with an adjustable vibration isolation sizing block which is in supporting contact with the ground.
In some embodiments, the plurality of displacement detection sensors includes at least 6 displacement detection sensors.
Some embodiments of the present disclosure provide a centerless grinding machine including the aforementioned cylindrical surface straightness detection device.
Some embodiments of the present disclosure provide a detection method of the foregoing device for detecting straightness of a cylindrical surface, including:
a placing step: placing a cylindrical workpiece to be tested on at least two workpiece supports;
a calibration step: adjusting the positions of the displacement detection sensors to enable the displacement detection sensors to be positioned on the same straight line, enabling the light curtain of the displacement detection sensors to be vertical to the axis of the cylindrical workpiece to be detected, and enabling the symmetrical center line of the light curtain of the displacement detection sensors to be coincident with the radial direction of the cylindrical workpiece to be detected;
a detection step: detecting the contour position parameters of the cylindrical workpiece to be detected by using a displacement detection sensor and transmitting the contour position parameters to a signal processing component;
parameter correction: calculating the deflection of the cylindrical workpiece to be measured caused by gravity by using a signal processing component to obtain a contour position correction parameter of the cylindrical workpiece to be measured;
a calculation step: and converting the contour position correction parameters into straightness data of the cylindrical workpiece to be measured by using a signal processing component.
In some embodiments, the at least two workpiece supports comprise two workpiece supports;
in the placing step, the cylindrical workpiece to be measured is placed on the two workpiece supports in the center;
the step of detecting the contour position parameter of the measured cylindrical workpiece comprises the following steps: establishing a straightness measuring coordinate system, wherein the horizontal direction in the radial direction of the measured cylindrical workpiece is an x-axis direction, the vertical direction in the radial direction of the measured cylindrical workpiece is a y-axis direction, the axial direction of the measured cylindrical workpiece is a z-axis direction, profile position parameter data detected by the displacement detection sensor on the measured cylindrical workpiece are recorded, the profile position parameter data represent the ith data point of the jth displacement detection sensor, i is 1, 2, 3 …, j is 1, 2, 3 …;
the parameter correction step comprises the following steps: the data of the contour position correction parameter is (x)ij，yij) And the deflection of the measured cylindrical workpiece caused by gravity is recorded as delta yijWherein y isij＝yij′+Δyij；
ΔyijThe calculation method comprises the following steps:
when z is more than or equal to 0 and less than or equal to a,
when a is less than or equal to z is less than or equal to L0At the time of-a, the first,
when L is0-a≤z≤L0When the temperature of the water is higher than the set temperature,
wherein a is the distance from the first end of the cylindrical workpiece to be measured to the supporting point of the closer workpiece supporting part, L0The length of the measured cylindrical workpiece is the total length of the measured cylindrical workpiece, z is the distance between the position of the displacement detection sensor corresponding to the measured cylindrical workpiece and the first end, g is the gravity borne by the measured cylindrical workpiece in unit length, E is the elastic modulus of the measured cylindrical workpiece, and I is the moment of inertia of the measured cylindrical workpiece.
Therefore, according to the embodiment of the disclosure, by arranging at least two workpiece supporting pieces and arranging a plurality of displacement detection sensors along the length direction of the detected cylindrical workpiece, the plurality of displacement detection sensors can detect the contour position parameters of the detected cylindrical workpiece at different positions, and then the signal processing part calculates the straightness data of the detected cylindrical workpiece, so that the error caused by the movement of the displacement detection sensors is reduced, and the straightness detection accuracy is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic block diagram of some embodiments of a cylindrical straightness detection apparatus of the present disclosure;
FIG. 2 is a schematic diagram of the displacement detection sensor and the cylindrical workpiece under test in some embodiments of the cylindrical surface straightness detection apparatus of the present disclosure;
fig. 3 is a schematic structural diagram of the displacement detection sensor and the measured cylindrical workpiece at another view angle in some embodiments of the cylindrical surface straightness detection device of the present disclosure.
Description of the reference numerals
1. A signal processing section; 2. a sensor support platform; 3. a sensor holder; 4. a cylindrical workpiece to be measured; 5. a workpiece support; 6. a workpiece support platform; 7. and a displacement detection sensor.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, devices, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
Referring to fig. 1 to 3, some embodiments of the present disclosure provide a cylindrical surface straightness detection apparatus for detecting the straightness of a cylindrical workpiece 4 to be detected, including: a workpiece support platform 6, at least two workpiece supports 5, a sensor support platform 2, a sensor mount 3, a plurality of displacement detection sensors 7 (not shown in fig. 1), and a signal processing section 1, wherein the workpiece supports 5 are disposed on the workpiece support platform 6, which is configured to horizontally support a cylindrical workpiece 4 under test; the sensor bracket 3 is arranged on the sensor supporting platform 2; a plurality of displacement detection sensors 7 mounted on the sensor holder 3 and arranged along the length direction of the cylindrical workpiece 4 to be measured, and configured to detect contour position parameters of the cylindrical workpiece 4 to be measured; the signal processing section 1 is configured to receive the position parameter detected by the displacement detection sensor 7 and convert it into straightness data of the cylindrical workpiece 4 to be measured.
In the exemplary embodiment, as shown in fig. 1 and fig. 2, by providing at least two workpiece supports 5 and arranging a plurality of displacement detection sensors 7 along the length direction of the cylindrical workpiece 4 to be measured, the plurality of displacement detection sensors 7 can detect the contour position parameters of the cylindrical workpiece 4 to be measured at different positions, and then the signal processing component 1 calculates the straightness data of the cylindrical workpiece to be measured, thereby reducing the error caused by the displacement detection sensors during movement and improving the straightness detection accuracy.
As shown in fig. 2, in some embodiments, the plurality of displacement detection sensors 7 are arranged at equal intervals L in the length direction of the cylindrical workpiece 4 to be measured, to improve the detection accuracy, and in some embodiments, the plurality of displacement detection sensors 7 includes at least 6 displacement detection sensors 7.
Since the plurality of displacement detection sensors 7 are arranged in the longitudinal direction along the cylindrical workpiece 4 to be measured, it is not necessary to detect the positional parameter in the longitudinal direction (i.e., the axial direction) of the cylindrical workpiece 4 to be measured, and in some embodiments, the displacement detection sensors 7 include two-dimensional laser displacement sensors, thereby simplifying the structural arrangement and having high implementability.
As to how the workpiece support 5 horizontally supports the cylindrical workpiece 4 to be measured, as shown in fig. 1, in some embodiments, the workpiece support 5 includes a V-shaped support or a U-shaped support to ensure support stability.
In order to improve the application range, in some embodiments, the position of the displacement detection sensor 7 relative to the sensor support 3 in both the vertical and horizontal directions is adjustable, so that the displacement detection sensor 7 can detect cylindrical workpieces 4 to be detected with different sizes, and the application range is high.
To ensure the detection accuracy, in some embodiments, the sensor holder 3 is provided with a positioning plate for positioning the displacement detection sensor 7, and the positioning plate is provided with a calibration mechanism fixedly disposed with the displacement detection sensor 7 and configured to calibrate the plurality of displacement detection sensors 7 to the same straight line.
As an implementation of the calibration mechanism, in some embodiments, the calibration mechanism includes a laser centering instrument or a laser tracker. The laser centering instrument and the laser tracker can enable the displacement detection sensors 7 to be located on the same straight line by adjusting the positions of the displacement detection sensors 7, ensure that the light curtain of the displacement detection sensors 7 is perpendicular to the axis of the measured cylindrical workpiece 4, ensure that the symmetrical center line of the light curtain of the displacement detection sensors 7 is coincident with the radial direction of the measured cylindrical workpiece 4, and have high implementability.
To reduce the external impact on the detection, in some embodiments, the bottom of the sensor support platform 2 is provided with an adjustable vibration isolation pad iron in contact with the ground support; in a similar way, the bottom of the workpiece supporting platform 6 is provided with an adjustable vibration isolation sizing block which is in supporting contact with the ground.
Some embodiments of the present disclosure provide a centerless grinding machine, including the aforementioned cylindrical surface straightness detection device, and the centerless grinding machine accordingly has the above-mentioned beneficial technical effects. The cylindrical surface straightness detection device can be rapidly integrated with a centerless grinder, and online straightness and roundness detection of the centerless grinder is realized.
The existing detection method does not consider the influence of the deflection caused by gravity on the detection accuracy in the detection process, and some embodiments of the present disclosure provide a detection method of the aforementioned cylindrical surface straightness detection device, including:
a placing step: placing a cylindrical workpiece 4 to be measured on at least two workpiece supports 5;
a calibration step: adjusting the positions of the displacement detection sensors 7 to enable the displacement detection sensors 7 to be located on the same straight line, enabling the light curtain of the displacement detection sensors 7 to be perpendicular to the axis of the cylindrical workpiece 4 to be detected, and enabling the symmetrical center line of the light curtain of the displacement detection sensors 7 to be coincident with the radial direction of the cylindrical workpiece 4 to be detected;
a detection step: the contour position parameters of the cylindrical workpiece 4 to be detected are detected by a displacement detection sensor 7 and are transmitted to the signal processing component 1;
parameter correction: calculating the deflection of the cylindrical workpiece 4 to be measured caused by gravity by using the signal processing part 1 to obtain the contour position correction parameter of the cylindrical workpiece 4 to be measured;
a calculation step: the contour position correction parameters are converted into straightness data of the cylindrical workpiece 4 to be measured by the signal processing section 1.
According to the method, the deflection of the cylindrical workpiece 4 to be detected, which is caused by gravity, is obtained through calculation, and the contour position correction parameters of the cylindrical workpiece 4 to be detected are obtained, so that the influence of the deflection on the detection accuracy is removed, and the detection accuracy is improved.
In some embodiments, as shown in fig. 1, the at least two workpiece supports 5 comprise two workpiece supports 5;
in the placing step, the cylindrical workpiece 4 to be measured is placed centrally on the two workpiece supports 5;
the step of detecting the contour position parameter of the measured cylindrical workpiece 4 comprises the following steps: establishing a straightness measuring coordinate system, wherein the horizontal direction in the radial direction of the measured cylindrical workpiece 4 is the direction of an x axis, and the vertical direction in the radial direction of the measured cylindrical workpiece 4The direction is the y-axis direction, the axial direction along the measured cylindrical workpiece 4 is the z-axis direction, the coordinate origin, the x-axis direction and the y-axis direction are respectively superposed with the coordinate origin, the x-axis direction and the y-axis direction of the displacement detection sensor 7, and the contour position parameter data detected by the displacement detection sensor 7 on the measured cylindrical workpiece 4 is recorded as (x-axis direction)ij，yij') indicating the ith data point of the jth displacement detection sensor 7, i being 1, 2, 3 …, j being 1, 2, 3 …;
the parameter correction step comprises the following steps: the data of the contour position correction parameter is (x)ij，yij) And the deflection of the measured cylindrical workpiece 4 caused by gravity is recorded as delta yijWherein y isij＝yij′+Δyij；
ΔyijThe calculation method comprises the following steps:
when z is more than or equal to 0 and less than or equal to a,
when a is less than or equal to z is less than or equal to L0At the time of-a, the first,
when L is0-a≤z≤L0When the temperature of the water is higher than the set temperature,
where a is the distance from the first end of the cylindrical workpiece 4 to be measured to the support point of the closer workpiece support 5, and L is0The total length of the cylindrical workpiece 4 to be measured, z is the distance between the position of the displacement detection sensor 7 corresponding to the cylindrical workpiece 4 to be measured and the first end, g is the gravity borne by the cylindrical workpiece 4 in unit length, E is the elastic modulus of the cylindrical workpiece 4 to be measured, and I is the moment of inertia of the cylindrical workpiece 4 to be measured.
Fitting the center of a circle according to least squares
The center coordinates of each section are
Accordingly, it is possible to obtain
Calculating point to centerline radial distance
Doubling the maximum distance to spatial straightness
f＝2Rmax(6)
And (3) calculating the difference between the maximum value and the minimum value of the distance between the discrete point of each section and the circle center according to the formula (2) to obtain the roundness of the section.
Through practical demonstration, the straightness of the cylindrical workpiece 4 to be measured is calculated more accurately by using the numerical calculation method.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (12)
1. A cylindrical surface straightness detection device is used for detecting the straightness of a cylindrical workpiece (4) to be detected, and is characterized by comprising:
a workpiece support platform (6);
at least two workpiece supports (5) arranged on the workpiece support platform (6) and configured to horizontally support the cylindrical workpiece (4) under test;
a sensor support platform (2);
a sensor support (3) arranged on the sensor support platform (2);
a plurality of displacement detection sensors (7) mounted on the sensor holder (3) and arranged along a length direction of the cylindrical workpiece (4) to be measured, and configured to detect a contour position parameter of the cylindrical workpiece (4) to be measured; and
and the signal processing component (1) is configured to receive the position parameters detected by the displacement detection sensor (7) and convert the position parameters into straightness data of the cylindrical workpiece to be detected (4).
2. The cylindrical surface straightness detection apparatus according to claim 1, wherein a plurality of the displacement detection sensors (7) are arranged at equal intervals in a direction along the length of the cylindrical workpiece (4) to be measured.
3. The cylindrical surface straightness detection device according to claim 1, wherein the displacement detection sensor (7) comprises a two-dimensional laser displacement sensor.
4. The cylindrical surface straightness detection apparatus according to claim 1, wherein the workpiece support member (5) comprises a V-shaped support member or a U-shaped support member.
5. The cylindrical surface straightness detection device according to claim 1, wherein the displacement detection sensor (7) is adjustable in position relative to the sensor support (3) in both vertical and horizontal directions.
6. The device for detecting the straightness of a cylindrical surface according to claim 1, wherein the sensor holder (3) is provided with a positioning plate for positioning the displacement detection sensor (7), and the positioning plate is provided with a calibration mechanism fixedly provided with the displacement detection sensor (7) and configured to calibrate the plurality of displacement detection sensors (7) to the same straight line.
7. The apparatus for detecting straightness of a cylindrical surface according to claim 6, wherein the alignment mechanism comprises a laser centering instrument or a laser tracker.
8. The device for detecting the straightness of a cylindrical surface according to claim 1, wherein the bottom of the sensor supporting platform (2) is provided with an adjustable vibration isolation sizing block which is in supporting contact with the ground; the bottom of the workpiece supporting platform (6) is provided with an adjustable vibration isolation sizing block which is in supporting contact with the ground.
9. The cylindrical surface straightness detection apparatus according to claim 1, wherein the plurality of displacement detection sensors (7) includes at least 6 displacement detection sensors (7).
10. A centerless grinding machine comprising the apparatus for detecting the straightness of a cylindrical surface according to any one of claims 1 to 9.
11. A method for inspecting the straightness inspection apparatus for a cylindrical surface according to any one of claims 1 to 9, comprising:
a placing step: -placing said cylindrical workpiece (4) under test on at least two of said workpiece supports (5);
a calibration step: adjusting the position of the displacement detection sensor (7) to enable the displacement detection sensors (7) to be located on the same straight line, wherein a light curtain of the displacement detection sensor (7) is perpendicular to the axis of the cylindrical workpiece (4) to be detected, and the symmetrical center line of the light curtain of the displacement detection sensor (7) is coincident with the radial direction of the cylindrical workpiece (4) to be detected;
a detection step: detecting the contour position parameters of the cylindrical workpiece (4) to be detected by using the displacement detection sensor (7) and transmitting the contour position parameters to the signal processing part (1);
parameter correction: calculating the deflection of the cylindrical workpiece (4) to be measured caused by gravity by using the signal processing part (1) to obtain the contour position correction parameter of the cylindrical workpiece (4) to be measured;
a calculation step: and converting the contour position correction parameters into straightness data of the cylindrical workpiece (4) to be measured by using the signal processing part (1).
12. The inspection method according to claim 11, wherein the at least two workpiece supports (5) comprise two workpiece supports (5);
in the placing step, the cylindrical workpiece (4) to be measured is placed centrally on the two workpiece supports (5);
the step of detecting the contour position parameter of the cylindrical workpiece (4) to be detected comprises the following steps: establishing a straightness measuring coordinate system, wherein the horizontal direction in the radial direction of the measured cylindrical workpiece (4) is the x-axis direction, the vertical direction in the radial direction of the measured cylindrical workpiece (4) is the y-axis direction, the axial direction of the measured cylindrical workpiece (4) is the z-axis direction, and the profile position parameter data detected by the displacement detection sensor (7) on the measured cylindrical workpiece (4) is recorded as (x)ij，yij') indicating the ith data point of the jth displacement detection sensor (7), i being 1, 2, 3 …, j being 1, 2, 3 …;
the parameter correction step includes: the profile position correction parameter data is recorded as (x)ij，yij) The deflection of the cylindrical workpiece (4) to be measured caused by gravity is recorded as delta yijWherein y isij＝yij′+Δyij；
ΔyijThe calculation method comprises the following steps:
when z is more than or equal to 0 and less than or equal to a,
when a is less than or equal to z is less than or equal to L0At the time of-a, the first,
when L is0-a≤z≤L0When the temperature of the water is higher than the set temperature,
wherein a is the distance from the first end of the cylindrical workpiece (4) to be measured to the support point of the closer workpiece support (5), and L0The total length of the cylindrical workpiece (4) to be measured is as follows, z is the distance between the position of the cylindrical workpiece (4) to be measured and the first end part corresponding to the displacement detection sensor (7), g is the gravity borne by the cylindrical workpiece (4) to be measured in unit length, E is the elastic modulus of the cylindrical workpiece (4) to be measured is as follows, and I is the moment of inertia of the cylindrical workpiece (4) to be measured.
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| CN202010740762.0A CN111702659A (en) | 2020-07-27 | 2020-07-27 | Cylindrical surface straightness detection device and detection method thereof, and centerless grinding machine |
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| CN202010740762.0A CN111702659A (en) | 2020-07-27 | 2020-07-27 | Cylindrical surface straightness detection device and detection method thereof, and centerless grinding machine |
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Cited By (1)
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|---|---|---|---|---|
| CN113324511A (en) * | 2021-05-14 | 2021-08-31 | 江苏徐工工程机械研究院有限公司 | Device and method for detecting straightness of drill rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113324511A (en) * | 2021-05-14 | 2021-08-31 | 江苏徐工工程机械研究院有限公司 | Device and method for detecting straightness of drill rod |
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