CN110307794B - High-precision intelligent aperture testing device and testing method - Google Patents

High-precision intelligent aperture testing device and testing method Download PDF

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Publication number
CN110307794B
CN110307794B CN201910583856.9A CN201910583856A CN110307794B CN 110307794 B CN110307794 B CN 110307794B CN 201910583856 A CN201910583856 A CN 201910583856A CN 110307794 B CN110307794 B CN 110307794B
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measuring
aperture
workpiece
testing device
fixed
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CN110307794A (en
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吴行飞
吕桂芳
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Beijing Prosper Precision Machine Tool Co ltd
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Beijing Prosper Precision Machine Tool Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/08Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/12Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters

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

Abstract

The invention relates to a high-precision intelligent aperture testing device and a testing method, wherein the high-precision intelligent aperture testing device comprises a fixed component, a motion measuring component and a positioning centering component, wherein the fixed component is used for fixing the motion measuring component and the positioning centering component, the motion measuring component obtains measurement data through motion adjustment of a measuring position, and the positioning centering component performs leveling centering on a workpiece; the measuring range is large, and the measuring device is suitable for measuring workpieces with larger inner holes; and the grating ruler is used for measuring, so that the measuring precision is high.

Description

High-precision intelligent aperture testing device and testing method
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a high-precision intelligent aperture testing device and a testing method, which are applied to measurement of the diameter size of an inner hole.
Background
The measurement mode of the diameter of the inner hole is mainly divided into two main types, namely two modes of a coordinate-based mode and a special-purpose-based mode, wherein the three-coordinate-based mode and the special-purpose-based mode are typically represented as a three-coordinate measuring instrument and a pneumatic measuring instrument, but the measurement range of the pneumatic measuring instrument is smaller, so that when the size of the inner hole is larger, the pneumatic measuring instrument is not applicable. The three-coordinate measuring instrument adopts the probe to carry out contact measurement, the surface of the measured workpiece is scratched, and the measuring time is relatively long, so that the three-coordinate measuring instrument is difficult to apply in the measuring field requiring higher integrity of the surface of the inner hole. Therefore, a new test device is needed for high-precision measurement of the bore diameter.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-precision intelligent aperture testing device and a testing method which have large measuring range and do not damage the surface of a tested workpiece.
The technical scheme of the invention is as follows: the utility model provides a high accuracy intelligent aperture testing arrangement, includes fixed subassembly, motion measurement subassembly and location centering subassembly, and fixed subassembly is used for fixed motion measurement subassembly and location centering subassembly, and motion measurement subassembly obtains measurement data through the motion adjustment measurement position, and location centering subassembly carries out leveling centering to the work piece.
Further, the fixed assembly comprises a first fixed table and a second fixed table, the first fixed table and the second fixed table are arranged in parallel up and down, the first fixed table is used for fixing the motion measuring assembly, and the second fixed table is used for fixing the positioning centering assembly.
Further, the motion measurement assembly comprises an air cylinder, a guide rail, a frame, a first sliding block, a second sliding block, a first rack, a gear, a second rack, a third sliding block, a grating ruler measuring head and a measuring probe, wherein the air cylinder and the guide rail are fixed on a first fixed table, the first sliding block and the second sliding block are fixedly arranged on the frame, the first sliding block and the second sliding block are slidingly arranged on the guide rail, one end of the air cylinder is fixedly connected with the frame, the air cylinder drives the frame to slide back and forth on the guide rail when in reciprocating linear motion, the grating ruler and the first rack are fixed on the frame, the first rack is connected with the second rack through the gear, and the second rack, the third sliding block and the grating ruler measuring head are fixed on a fixed seat.
Further, the two measuring heads of the measuring probe are respectively fixed on the fixing seat and the frame, and the two measuring heads are horizontally aligned.
Further, the positioning centering assembly comprises a lower positioning column and an upper positioning disk, the centers of the lower positioning column and the upper positioning disk are centered, a chute is formed in the diameter direction of the lower positioning column and the diameter direction of the upper positioning disk, the measuring probe can slide in the chute, the upper positioning disk is provided with the centering assembly, and the inner hole is centered with the center of the upper positioning disk through synchronous movement of the centering assembly.
Further, a plurality of contact sensors which are symmetrical in center are arranged between the lower positioning column and the upper positioning disk.
The invention also provides a testing method of the high-precision intelligent aperture testing device, which is characterized in that: the method specifically comprises the following steps:
s1, selecting a standard gauge within a measurement size range, and measuring the aperture of the standard gauge by a testing device;
S2, comparing the measured value of the standard gauge aperture with a standard value, and if the comparison result is within an error range, completing calibration; if the comparison result is not in the error range, debugging the testing device again, and repeating the previous step until the comparison result is in the error range;
s3, placing a workpiece to be measured, and completing automatic centering of the workpiece;
S4, the testing device starts a measuring step, and the control system drives the air cylinder to move so as to drive the grating ruler and the grating ruler measuring head to move in opposite directions;
S5, the control system reads the reading of the grating ruler, and the reading of the grating ruler is the aperture of the workpiece.
Further, the method also comprises the following steps: s6, the control system compares the measured aperture numerical value with a set numerical value, and if the comparison result is within an error range, the workpiece is qualified; if the comparison result is not in the error range, transmitting the difference value to a numerical control machine tool, analyzing the overall tolerance trend of the workpiece, then carrying out tool compensation on the next workpiece, and executing the steps again until the comparison result is in the error range.
The invention has the following beneficial effects: the high-precision intelligent aperture testing device has the advantages that the probe surface of the measuring probe is smooth, the contact area between the probe surface and the inner surface of the inner hole is large, and the inner surface of the inner hole is not damaged; the measuring range is large, and the measuring device is suitable for measuring workpieces with larger inner holes; the measurement accuracy of the grating ruler can reach 0.5 micron by using the grating ruler for measurement.
Drawings
FIG. 1 is a side view of a high-precision smart aperture test apparatus.
Fig. 2 is a bottom view of the high-precision smart aperture test device.
Fig. 3 is a front view of a high-precision smart aperture test device.
FIG. 4 is a schematic diagram of a positioning and centering structure of the high-precision intelligent aperture testing device.
Wherein the above figures include the following reference numerals: 1. a first fixed stage; 2. a cylinder; 3. a guide rail; 4. a frame; 5. a first slider; 6. a second slider; 7. a first rack; 8. a gear; 9. a second rack; 10. a third slider; 11. a grating ruler; 12. a grating ruler measuring head; 13. a measurement probe; 14. a second fixed stage; 15. a lower positioning column; 16. an upper positioning disk; 17. a contact sensor; 18. a chute; 19. centering components; 20. a fixing seat.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-4, a high-precision intelligent aperture testing device comprises a fixing assembly, a motion measuring assembly and a positioning centering assembly, wherein the fixing assembly is used for fixing the motion measuring assembly and the positioning centering assembly, the motion measuring assembly obtains measurement data through adjusting a measuring position by motion, and the positioning centering assembly performs leveling centering on a workpiece.
The fixed assembly comprises a first fixed table 1 and a second fixed table 14, the first fixed table 1 and the second fixed table 14 are arranged in parallel up and down, the first fixed table 1 is used for fixing the motion measuring assembly, and the second fixed table 14 is used for fixing the positioning centering assembly.
The motion measurement assembly comprises an air cylinder 2, a guide rail 3, a frame 4, a first sliding block 5, a second sliding block 6, a first rack 7, a gear 8, a second rack 9, a third sliding block 10, a grating ruler 11, a grating ruler measuring head 12 and a measuring probe 13, wherein the air cylinder 2 and the guide rail 3 are fixed on a first fixed table 1, the first sliding block 5 and the second sliding block 6 are fixedly arranged on the frame 4, the first sliding block 5 and the second sliding block 6 are slidably arranged on the guide rail 3, one end of the air cylinder 2 is fixedly connected with the frame 4, the frame 4 is driven to reciprocate on the guide rail 3 when the air cylinder 2 reciprocates in a linear motion, the grating ruler 11 and the first rack 7 are fixed on the frame 4, the first rack 7 is connected with the second rack 9 through the gear 8, the second rack 9, the third sliding block 10 and the grating ruler measuring head 12 are fixed on a fixed seat 20, two measuring heads of the measuring probe 13 are respectively fixed on the fixed seat 20 and the frame 4, and the two measuring heads are horizontally aligned. The surface of the measuring probe 13 is smooth, the contact area with the inner surface of the inner hole is large, and the inner surface is not damaged.
The positioning centering assembly comprises a lower positioning column 15 and an upper positioning disk 16, the centers of the lower positioning column 15 and the upper positioning disk 16 are centered, the outer contour is circular, a plurality of contact sensors 17 with central symmetry are arranged between the lower positioning column 15 and the upper positioning disk 16, a sliding groove 18 is formed in the diameter direction of the lower positioning column 15 and the diameter direction of the upper positioning disk 16, the measuring probe 13 can slide outwards from the central position in the sliding groove 18, the upper positioning disk 16 is provided with a centering assembly 19, and the inner hole is centered with the center of the upper positioning disk 16 through synchronous movement of the centering assembly 19.
When the inner diameter of a workpiece is measured, the workpiece is firstly placed on the upper positioning disk 16, after a plurality of contact sensors sense signals, the workpiece is stated to be flat, the workpiece can be measured, the cylinder 2 stretches to drive the frame 4 to slide on the guide rail 3, one probe of the grating ruler 11 and the measuring probe 13 is driven to move, the first rack 7 moves along with the frame 4, the second rack 9, the third slider 10, the grating ruler measuring head 12, the fixed seat 20 and the other probe of the measuring probe 13 are driven to move in opposite directions through the gear 8, namely, two probes of the measuring probe 13 move in opposite directions, the grating ruler 11 and the grating ruler measuring head 12 move in opposite directions, when the probe of the measuring probe 13 contacts with the inner wall of the workpiece, the movement is stopped, and at the moment, the diameter of the inner hole of the workpiece can be calculated by reading the moving distance of the grating ruler probe 12.
The embodiment also provides a testing method of the high-precision intelligent aperture testing device, which specifically comprises the following steps:
s1, selecting a standard gauge within a measurement size range, and measuring the aperture of the standard gauge by a testing device;
S2, comparing the measured value of the standard gauge aperture with a standard value, and if the comparison result is within an error range, completing calibration; if the comparison result is not in the error range, debugging the testing device again, and repeating the previous step until the comparison result is in the error range;
s3, placing a workpiece to be measured, and completing automatic centering of the workpiece;
S4, the testing device starts a measuring step, and the control system drives the air cylinder to move so as to drive the grating ruler and the grating ruler measuring head to move in opposite directions;
s5, the control system reads the reading of the grating ruler, and the reading of the grating ruler is the aperture of the workpiece;
S6, the control system compares the measured aperture numerical value with a set numerical value, and if the comparison result is within an error range, the workpiece is qualified; if the comparison result is not in the error range, transmitting the difference value to a numerical control machine tool, analyzing the overall tolerance trend of the workpiece, then carrying out tool compensation on the next workpiece, and executing the steps again until the comparison result is in the error range.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.

Claims (6)

1. A high-precision intelligent aperture testing device is characterized in that: the positioning centering assembly is used for leveling and centering the workpiece;
The motion measurement assembly comprises a cylinder, a guide rail, a frame, a first sliding block, a second sliding block, a first rack, a gear, a second rack, a third sliding block, a grating ruler measuring head and a measuring probe, wherein the cylinder and the guide rail are fixed on a first fixed table;
the measuring probe is provided with two measuring heads which are respectively fixed on the fixed seat and the frame and are horizontally aligned;
the surface of the measuring probe is smooth.
2. The high-precision intelligent aperture testing apparatus according to claim 1, wherein: the fixed assembly comprises a first fixed table and a second fixed table, the first fixed table and the second fixed table are arranged in parallel up and down, the first fixed table is used for fixing the motion measuring assembly, and the second fixed table is used for fixing the positioning centering assembly.
3. The high-precision intelligent aperture testing apparatus according to claim 1, wherein: the positioning centering assembly comprises a lower positioning column and an upper positioning disk, the centers of the lower positioning column and the upper positioning disk are centered, a chute is formed in the diameter direction of the lower positioning column and the diameter direction of the upper positioning disk, the measuring probe can slide in the chute, the upper positioning disk is provided with a centering assembly, and the inner hole is centered with the center of the upper positioning disk through synchronous movement of the centering assembly.
4. A high precision smart aperture test apparatus as defined in claim 3, wherein: and a plurality of contact sensors which are centrosymmetric are arranged between the lower positioning column and the upper positioning disk.
5. A testing method of a high-precision intelligent aperture testing device is characterized by comprising the following steps of: the method for measuring the inner diameter of a workpiece by using the high-precision intelligent aperture testing device as claimed in any one of claims 1 to 4, which specifically comprises the following steps:
s1, selecting a standard gauge within a measurement size range, and measuring the aperture of the standard gauge by a testing device;
S2, comparing the measured value of the standard gauge aperture with a standard value, and if the comparison result is within an error range, completing calibration; if the comparison result is not in the error range, debugging the testing device again, and repeating the previous step until the comparison result is in the error range;
s3, placing a workpiece to be measured, and completing automatic centering of the workpiece;
S4, the testing device starts a measuring step, and the control system drives the air cylinder to move so as to drive the grating ruler and the grating ruler measuring head to move in opposite directions;
S5, the control system reads the reading of the grating ruler, and the reading of the grating ruler is the aperture of the workpiece.
6. The method for testing the high-precision intelligent aperture testing device according to claim 5, wherein the method comprises the following steps: the method also comprises the following steps: s6, the control system compares the measured aperture numerical value with a set numerical value, and if the comparison result is within an error range, the workpiece is qualified; if the comparison result is not in the error range, transmitting the difference value to a numerical control machine tool, analyzing the overall tolerance trend of the workpiece, then carrying out tool compensation on the next workpiece, and executing the steps again until the comparison result is in the error range.
CN201910583856.9A 2019-07-01 2019-07-01 High-precision intelligent aperture testing device and testing method Active CN110307794B (en)

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CN113091621A (en) * 2021-05-08 2021-07-09 福州云睿自动化设备有限公司 Pneumatic driving miniature grating ruler

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Publication number Priority date Publication date Assignee Title
CN207095538U (en) * 2017-08-09 2018-03-13 宁波银驰电气有限公司 A kind of aperture measurement device
CN208282806U (en) * 2018-05-18 2018-12-25 新昌县城关东日机械厂 A kind of bearing inner race apparatus for detecting diameter
CN210070867U (en) * 2019-07-01 2020-02-14 北京博鲁斯潘精密机床有限公司 High-precision intelligent aperture testing device

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Publication number Priority date Publication date Assignee Title
DE102014107784A1 (en) * 2014-06-03 2015-12-03 Marposs Gmbh System and method for measuring a dimension of a workpiece
CN104406500A (en) * 2014-12-18 2015-03-11 天津立林钻头有限公司 Gauge for measurement of inner diameter groove and end surface of small-size roller bit

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN207095538U (en) * 2017-08-09 2018-03-13 宁波银驰电气有限公司 A kind of aperture measurement device
CN208282806U (en) * 2018-05-18 2018-12-25 新昌县城关东日机械厂 A kind of bearing inner race apparatus for detecting diameter
CN210070867U (en) * 2019-07-01 2020-02-14 北京博鲁斯潘精密机床有限公司 High-precision intelligent aperture testing device

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