CN215572702U - Detection device for geometric error of opening of cylinder - Google Patents
Detection device for geometric error of opening of cylinder Download PDFInfo
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- CN215572702U CN215572702U CN202121562549.1U CN202121562549U CN215572702U CN 215572702 U CN215572702 U CN 215572702U CN 202121562549 U CN202121562549 U CN 202121562549U CN 215572702 U CN215572702 U CN 215572702U
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Abstract
The utility model provides a device for detecting geometric errors of a cylinder opening, which comprises a bracket, a detection device and a detection device, wherein the bracket is used for being arranged in a cylinder to be detected; the first line laser sensor is arranged on the bracket; the second line laser sensor is arranged on the bracket, and the distance between the second line laser sensor and the first line laser sensor is 2-3 times of the width of the ring groove of the cylinder to be detected; the detection device for the geometric errors of the opening of the cylinder has more accurate detection and high reliability.
Description
Technical Field
The utility model belongs to the field of product geometric error detection and evaluation, and particularly relates to a device for detecting geometric errors of a cylinder opening.
Background
The thin-wall cylinder is a part with a small thickness-diameter ratio, can bear a relatively large load with relatively small weight, and in order to ensure the sealing performance of the thin-wall cylinder container, a ring groove structure is often designed at a position near a mouth part for installing a sealing ring. The size and geometric error of the ring groove have important influence on the sealing performance of the cylindrical container and need to be strictly controlled.
The existing measuring method mainly comprises a three-coordinate measuring machine measuring method and a vision measuring method. The result of the measurement of the three-coordinate measuring machine is reliable, but the depth of the ring groove structure is small due to the limited wall thickness of the thin-wall cylinder, the easy-to-strike pin is measured and evaluated by using the three-coordinate measuring machine, and the measurement efficiency is low. The visual measurement method has high efficiency, but the edge of the groove has small round angle due to the limitation of processing capacity, so that the edge identification problem exists in the image measurement mode, and the measurement reliability is low. In summary, the conventional measurement method is difficult to satisfy the requirement of reliable and efficient measurement.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for detecting the geometric error of a cylindrical opening, which can detect the geometric error of the cylindrical opening more accurately and has high reliability.
In order to achieve the above object, a first aspect of the present invention provides a device for detecting a geometric error of a cylindrical mouth portion, comprising:
the bracket is used for being arranged in the cylinder to be detected;
the first line laser sensor is arranged on the bracket;
the second line laser sensor is arranged on the bracket, and the distance between the second line laser sensor and the first line laser sensor is 2-3 times of the width of the ring groove of the cylinder to be detected;
the cylinder to be detected is arranged on the rotary table.
In any one of the above technical solutions, preferably, the holder is provided with a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface are arranged to be inclined with respect to an end surface of the turntable, the first line laser sensor is arranged on the first mounting surface, and the second line laser sensor is arranged on the second mounting surface;
the clamp of the first mounting surface and the end surface is 40-60 degrees, and the clamp of the second mounting surface and the end surface is 40-60 degrees.
In any one of the above technical solutions, preferably, the turntable includes:
the workpiece turntable is used for arranging the cylinder to be detected;
the output end of the rotary table motor is connected with the workpiece turntable;
the motor installation seat is arranged on the rotary table motor base, and the rotary table motor is arranged on the motor installation seat.
In any of the above technical solutions, preferably, the method further includes:
a mechanical arm;
the clamping piece is arranged at one end of the mechanical arm, and one end of the bracket is connected with the clamping piece;
and the other end of the mechanical arm is connected with the base.
The utility model has the beneficial effects that: the utility model provides a device for detecting geometric errors of a cylinder opening, which comprises a cylinder to be detected and a support, wherein in the using process, the cylinder to be detected comprises a ring groove and a step surface, the ring groove is formed in the inner wall of the cylinder to be detected, the step surface is arranged on the inner wall of the cylinder to be detected, the area of the cylinder to be detected, which is positioned in the ring groove, is a first detection section, the area of the cylinder to be detected, which is positioned between the step surface and the ring groove, is a second detection section, in the detecting process, the cylinder to be detected can be arranged on the rotary table, the support is arranged in the cylinder to be detected, a first line laser sensor can detect the first detection section, a second line laser sensor can detect the second detection section, and the distance between the second line laser sensor and the first line laser sensor is 2-3 times of the width of the ring groove of the cylinder to be detected, so that the device for detecting the geometric errors of the cylinder opening can detect the first detection section and the second detection section, furthermore, a matrix is established based on the relation between the second line laser sensor and the first line laser sensor, and the detection result of the second line laser sensor is corrected and fitted to the detection result of the first line laser sensor, so that the geometric error of the opening of the cylinder can be accurately judged, and the inspection precision and the detection reliability are greatly improved.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic configuration diagram showing a detection apparatus of geometric errors of a cylindrical mouth portion according to an embodiment of the present invention.
Fig. 2 is a schematic configuration diagram showing a detection apparatus of geometric errors of a cylindrical mouth portion according to an embodiment of the present invention.
Fig. 3 shows a flow chart of schematic steps of a method for detecting geometric errors of a cylindrical opening according to an embodiment of the utility model.
Description of reference numerals:
1. a support; 2. a first line laser sensor; 3. a second line laser sensor; 4. a turntable; 5. a workpiece turntable; 6. a turntable motor; 7. a motor mounting seat; 8. a turntable motor base; 9. a mechanical arm; 10. a clamping member; 11. a base; 12. a mechanical arm base; 13. the cylinder is inspected.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
Fig. 1 is a schematic configuration diagram showing a detection apparatus of geometric errors of a cylindrical mouth portion according to an embodiment of the present invention. Fig. 2 is a schematic configuration diagram showing a detection apparatus of geometric errors of a cylindrical mouth portion according to an embodiment of the present invention. Fig. 3 shows a flow chart of schematic steps of a method for detecting geometric errors of a cylindrical opening according to an embodiment of the utility model.
As shown in fig. 1, the present invention provides a device for detecting a geometric error of a cylindrical opening, including: the bracket 1 is used for being arranged in the cylinder 13 to be detected; the first line laser sensor 2 is arranged on the bracket 1; the second line laser sensor 3 is arranged on the bracket 1, and the distance between the second line laser sensor 3 and the first line laser sensor 2 is 2 to 3 times of the width of the ring groove of the cylinder 13 to be detected; a turntable 4, a cylinder to be detected 13 for being arranged on the turntable 4.
The utility model provides a device for detecting geometric errors of a cylinder opening, wherein in the use process, a cylinder 13 to be detected comprises a ring groove and a step surface, the ring groove is formed in the inner wall of the cylinder 13 to be detected, the step surface is arranged on the inner wall of the cylinder 13 to be detected, the area of the cylinder 13 to be detected, which is positioned in the ring groove, is a first detection section, the area of the cylinder 13 to be detected, which is positioned between the step surface and the ring groove, is a second detection section, in the detection process, the cylinder 13 to be detected can be arranged on a rotary table 4, a bracket 1 is arranged in the cylinder 13 to be detected, a first line laser sensor 2 can detect the first detection section, a second line laser sensor 3 can detect the second detection section, and the detection device for detecting the geometric errors of the cylinder opening can detect the first detection section and the second detection section by the fact that the distance between the second line laser sensor 3 and the first line laser sensor 2 is 2-3 times of the width of the ring groove of the cylinder 13 to be detected, further, a matrix is established based on the relation between the second line laser sensor 3 and the first line laser sensor 2, and the detection result of the second line laser sensor 3 is corrected and fitted to the detection result of the first line laser sensor 2, so that the geometric error of the opening of the cylinder can be accurately judged, and the inspection precision and the detection reliability are greatly improved.
It can be understood that the rotary table 4 is convenient for drive to detect the rotation of the cylinder 13, the first line laser sensor 2 and the second line laser sensor 3 are convenient for collect the data of the inner wall periphery of the cylinder 13, the detection precision can be improved, and the detection is convenient to be carried out smoothly.
As a preferable technical scheme, a first mounting surface and a second mounting surface are arranged on a bracket 1, the first mounting surface and the second mounting surface are obliquely arranged relative to the end surface of a rotary table 4, a first line laser sensor 2 is arranged on the first mounting surface, and a second line laser sensor 3 is arranged on the second mounting surface; the clamp of the first mounting surface and the end surface is 40-60 degrees, and the clamp of the second mounting surface and the end surface is 40-60 degrees.
In this technical scheme, further provide the concrete structure of support 1, support 1 has included first installation face and second installation face, the installation of the second line laser sensor 3 of being convenient for and first line laser sensor 2, the anchor clamps of first installation face and terminal surface are 40 to 60, the second installation face can ensure that first line laser sensor 2 can detect first detection section for 40 to 60 with the anchor clamps of terminal surface, and second line laser sensor 3 can detect the second detection section.
As a preferred solution, the turntable 4 comprises: the workpiece rotating disc 5 is used for arranging the cylinder to be detected 13; the output end of the rotary table motor 6 is connected with the workpiece rotary table 5; motor mount pad 7 and revolving stage motor base 8, motor mount pad 7 sets up on revolving stage motor base 8, and revolving stage motor 6 sets up on motor mount pad 7.
In this solution, the turntable 4 comprises: work piece carousel 5, revolving stage motor 6, motor mount pad 7 and revolving stage motor base 8 are convenient for drive work piece carousel 5 through setting up of revolving stage motor 6 and rotate, through the setting of revolving stage motor base 8, provide the mounted position for revolving stage motor 6.
As a preferred solution, the device for detecting geometric errors of a cylindrical opening further comprises: a mechanical arm 9; the clamping piece 10 is arranged at one end of the mechanical arm 9, and one end of the support 1 is connected with the clamping piece 10; the base 11, another end of the mechanical arm 9 is connected to the base 11.
In this technical scheme, the detection device of drum oral area geometric error has still included arm 9 and holder 10, can drive support 1 through the setting of arm 9 and remove, is convenient for fixed bolster 1 through the setting of holder 10, is convenient for arm 9's installation through the setting of base 11.
In some examples, a robot base 12 may be included, with one end of the robot 9 being attached to the robot base 12, and the robot base 12 being attached to the base 11.
The utility model discloses a detection device for geometric errors of a cylinder opening part, which can be used for evaluating the errors of the size, the shape, the direction and the position of ring groove elements of the cylinder opening part. The support 1, the first line laser sensor 2 and the second line laser sensor 3 are arranged on the line laser support 1 at a certain angle, and can mutually measure the measuring blind areas of the opposite sides to realize the scanning of the section appearance of the ring groove; the rotary table 4 consists of a workpiece rotary table 5, a rotary table motor 6, a motor mounting seat 7 and a rotary table motor base 8, the upper end surface of the workpiece rotary table 5 is parallel to the rotary table 4 base, the thin-wall cylinder to be measured is mounted on the workpiece rotary table 5, the rotary table motor 6 can drive the workpiece rotary table 5 to further drive the thin-wall cylinder to rotate, and complete measurement of the ring groove in the circumferential direction can be realized by matching the first line laser sensor 2 and the second line laser sensor 3; the support 1 is arranged at the tail end of the mechanical arm 9, and can realize the movement and coarse positioning of the measuring unit.
As shown in fig. 2 and fig. 3, according to a second aspect of the present invention, there is provided a method for detecting a geometric error of a mouth portion of a cylinder, which is applied to a device for detecting a geometric error of a mouth portion of a cylinder according to any one of the above technical solutions, wherein the cylinder to be detected includes a ring groove and a step surface, the ring groove is formed in an inner wall of the cylinder to be detected, the step surface is formed on the inner wall of the cylinder to be detected, a region of the cylinder to be detected, which is located in the ring groove, is a first detection section, and a region located between the step surface and the ring groove is a second detection section, the method includes:
step 101: arranging a cylinder to be detected on a rotary table;
step 102: arranging the bracket in the cylinder to be detected;
step 103: driving the cylinder to be detected to rotate through the rotary table;
step 104: collecting element sets through a first line laser sensor and a second line laser sensor;
step 105: and determining the geometric error of the opening of the cylinder to be detected through the element set.
As shown in fig. 2, three surfaces ABC are the first detection section, CDEF is the second detection section, and HG is the step surface.
The detection method of drum oral area geometric error that this application embodiment provided sets up the support in detecting the drum, and the rethread revolving stage drives and detects that the drum rotates, can first line laser sensor can detect first detection section, and second line laser sensor can detect the second detection section, so set up and to gather the key element set jointly, ensured the richness of key element set, again based on the key element set can, confirm to detect the oral area geometric error of drum.
As a preferred technical scheme, the step of driving the cylinder to be detected to rotate by the turntable comprises the following steps: defining the normal direction of the end surface of the rotary table as a Z axis, the rotation direction of the rotary table as a theta direction, and the radius direction of the cylinder to be detected as an R direction; the control turntable rotates in the theta direction at a first angular speed.
As a preferred technical solution, the step of collecting the element set by the first line laser sensor and the second line laser sensor includes: setting a first detection period; every time a detection period passes, acquiring end face information of a first detection section as a first point set, acquiring inner wall information of the first detection section as a second point set, acquiring end face information of a second detection section as a third point set, and acquiring inner wall information of the second detection section as a fourth point set by a first line laser sensor; every time a detection period passes, the upper end face information of the ring groove is collected as a fifth point set through the second line laser sensor, and the inner wall information of the ring groove is collected as a sixth point set.
As shown in fig. 2, for the end face of the first detection segment, which is the face marked at a in fig. 2, the first point set may be marked as PAThe inner wall of the first detection segment is the surface marked by B in FIG. 2, and the second point set can be marked as PBThe upper end surface of the ring groove is the surface marked at C in the attached figure 2, and the fifth point set can be marked as PCThe sixth set of points on the inner wall of the ring groove, which is the surface identified at D in FIG. 2, can be labeled as PDThe end face of the second detection section is a third point set of the face marked by the point E in fig. 2, and the third point set can be marked as PEThe inner wall of the second sensing segment is the surface marked at F in FIG. 2, and the fourth set of points can be marked as PF。
As a preferred technical scheme, the step of determining the geometric error of the opening of the cylinder to be detected through the element set comprises the following steps: acquiring a distance relation between a first line laser sensor and a second laser sensor, and an installation angle relation between the first line laser sensor and the second laser sensor; constructing a relation matrix between the first line laser sensor and the second laser sensor based on the distance relation and the installation angle relation; substituting the fifth point set into the relation matrix to obtain a corrected fifth point set which is in the same coordinate system with the first point set, the second point set, the third point set and the fourth point set; substituting the sixth point set into the relation matrix to obtain a corrected sixth point set which is in the same coordinate system with the first point set, the second point set, the third point set and the fourth point set; and determining the geometric error of the mouth part of the cylinder to be detected based on the first point set, the second point set, the third point set, the fourth point set, the corrected fifth point set and the corrected sixth point set.
According to the actual measurement geometric dimension of the linear laser sensor bracket and the installation error between the linear laser sensors, the position relation between the two linear laser sensors can be calculated and can be represented as a homogeneous matrix
Wherein, P1Indicating the point measured by the first line laser sensor, P2Indicating the point measured by the second line laser sensor, T0、R0Respectively represent the position relation matrix of the two, L0Indicating the distance between the line laser sensors, theta0Representing the angle between the line laser sensors.
Set P of fifth pointsCThe corrected fifth point set P can be obtained by substituting the matrixC', set P the sixth pointDThe corrected sixth point set P can be obtained by substituting the matrixD′。
Based on the first point set PAA second set of points PBCorrecting the fifth point set PC', correcting the sixth point set PD', the third set of points PEAnd a fourth set of points PF。
As a preferred technical solution, the step of determining the geometric error of the mouth of the cylinder to be detected based on the first point set, the second point set, the third point set, the fourth point set, the corrected fifth point set, and the corrected sixth point set includes: determining the Z-axis error of the opening of the cylinder to be detected based on the first point set, the corrected fifth point set and the third point set; and determining the R direction error of the opening part of the cylinder to be detected based on the second point set, the corrected sixth point set and the fourth point set.
As a preferred technical solution, the step of determining the geometric error of the mouth of the cylinder to be detected based on the first point set, the second point set, the third point set, the fourth point set, the corrected fifth point set, and the corrected sixth point set further includes: determining the parallelism error of the opening of the cylinder to be detected based on the corrected fifth point set and the first point set; determining the perpendicularity error of the opening of the cylinder to be detected based on the first point set, the corrected sixth point set and the fourth point set; and determining the errors of the upper end surface and the lower end surface of the ring groove of the cylinder to be detected and the Z-axis direction based on the fifth point set and the fourth point set.
Fitting plane P using least squaresA,PC′,PEFinding the maximum deviation point along the Z direction and the maximum deviation along the-Z directionSeparating points, and calculating the difference value of the points in the Z direction, wherein the difference value is the shape error of the plane to be measured; fitting cylindrical surface P using least squaresB,PD′,PFAnd finding out the maximum deviation point outside the cylinder and the maximum deviation point inside the cylinder, and calculating the difference value of the maximum deviation point and the maximum deviation point in the R direction, wherein the difference value is the shape error of the cylindrical surface to be measured.
Calculating a plane P by using the plane of the element A as a referenceC′,PEAnd PAEvaluating the parallelism error of the plane to be measured; by counting the cylindrical surface PB,PD′,PFAxis and PAAnd (4) evaluating the verticality error of the cylindrical surface to be detected.
Calculating PC' and PEThe average distance between the two ring grooves is obtained to obtain the width of the ring groove to be measured; respectively calculate PAAnd PC′,PEThe average distance between can be used to estimate PC' and PEPosition error in the Z direction.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (4)
1. A device for detecting geometric errors of a cylindrical mouth, comprising:
the bracket is used for being arranged in the cylinder to be detected;
the first line laser sensor is arranged on the bracket;
the second line laser sensor is arranged on the bracket, and the distance between the second line laser sensor and the first line laser sensor is 2-3 times of the width of the ring groove of the cylinder to be detected;
the cylinder to be detected is arranged on the rotary table.
2. The apparatus for detecting geometric errors of a cylindrical mouth according to claim 1,
the bracket is provided with a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface are obliquely arranged relative to the end surface of the rotary table, the first line laser sensor is arranged on the first mounting surface, and the second line laser sensor is arranged on the second mounting surface;
the clamp of the first mounting surface and the end surface is 40-60 degrees, and the clamp of the second mounting surface and the end surface is 40-60 degrees.
3. Device for detecting geometric errors of the mouth of a cylinder according to claim 2, characterized in that said turret comprises:
the workpiece turntable is used for arranging the cylinder to be detected;
the output end of the rotary table motor is connected with the workpiece turntable;
the motor installation seat is arranged on the rotary table motor base, and the rotary table motor is arranged on the motor installation seat.
4. The apparatus for detecting geometric errors of a cylindrical mouth according to claim 1, further comprising:
a mechanical arm;
the clamping piece is arranged at one end of the mechanical arm, and one end of the bracket is connected with the clamping piece;
and the other end of the mechanical arm is connected with the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121562549.1U CN215572702U (en) | 2021-07-09 | 2021-07-09 | Detection device for geometric error of opening of cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121562549.1U CN215572702U (en) | 2021-07-09 | 2021-07-09 | Detection device for geometric error of opening of cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215572702U true CN215572702U (en) | 2022-01-18 |
Family
ID=79824720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121562549.1U Active CN215572702U (en) | 2021-07-09 | 2021-07-09 | Detection device for geometric error of opening of cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215572702U (en) |
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2021
- 2021-07-09 CN CN202121562549.1U patent/CN215572702U/en active Active
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