CN109141231B - Automatic measuring method for workpiece - Google Patents
Automatic measuring method for workpiece Download PDFInfo
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- CN109141231B CN109141231B CN201810849580.XA CN201810849580A CN109141231B CN 109141231 B CN109141231 B CN 109141231B CN 201810849580 A CN201810849580 A CN 201810849580A CN 109141231 B CN109141231 B CN 109141231B
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses an automatic workpiece measuring method in the field of machining measurement, which comprises a workpiece directional transportation method, a workpiece dynamic detection method and a workpiece buffering and positioning method, wherein the workpiece dynamic detection method comprises the steps of directionally moving a workpiece on a detection table, detecting the size of the workpiece from the side end of the workpiece in the moving process, and the workpiece size detection comprises the steps of converting the workpiece size detection result into a laser signal through a detection mechanism and converting the laser signal into an electric signal through a laser ranging sensor to judge the detection result. The invention can solve the problem of low manual operation efficiency of the existing workpiece detection.
Description
Technical Field
The invention relates to the field of machining measurement, in particular to an automatic workpiece measuring method.
Background
After the workpiece is machined on the machine tool, the workpiece needs to be detected, so that whether the machined workpiece meets the standard or not is checked, and unqualified workpieces are prevented from flowing to the market.
For disc-like workpieces, grooves need to be machined on the circumferential surface of the disc-like workpiece, such as machining of pulleys, machining of automobile shock absorber pistons and the like. The existing detection method for the disc-type workpiece is to manually measure the grooves turned on the circumferential surface of the disc-type workpiece through a vernier caliper, and the detection method is low in efficiency and high in detection strength and cannot monitor the turning precision of the grooves in real time.
Disclosure of Invention
The invention aims to provide an automatic workpiece measuring method to solve the problem of low manual operation efficiency of the conventional workpiece detection.
In order to achieve the purpose, the basic technical scheme of the invention is as follows: the workpiece dynamic detection method comprises the steps of carrying out directional movement on a workpiece on a detection table, carrying out workpiece size detection from the side end of the workpiece in the moving process, wherein the workpiece size detection comprises the steps of converting a workpiece size detection result into a laser signal through a detection mechanism, and converting the laser signal into an electric signal through a laser ranging sensor to judge the detection result.
The principle and the advantages of the scheme are as follows: the workpiece is sequentially subjected to placing direction adjustment, directional transportation, buffering and positioning, dynamic detection and the like through multiple steps, the size of the workpiece is automatically detected through mechanical equipment, the detection result of the workpiece is quickly and accurately converted into light and electric signals through the detection mechanism to obtain a visual detection result, and compared with the manual detection method of the workpiece through a vernier caliper, the detection efficiency is higher, the manual judgment influence is small, and the detection result is more objective and accurate.
Further, the workpiece buffer positioning method comprises a workpiece primary positioning buffer operation performed before the workpiece dynamic inspection method and a workpiece re-positioning buffer operation performed after the workpiece dynamic inspection method. By adopting the method, the workpieces are buffered and positioned before and after entering the detection, so that the starting position and the end position of the workpieces are more accurate in the subsequent dynamic detection process, the workpieces are conveniently and accurately moved to the detection position and the discharge position, and the workpieces are prevented from being flushed out of the detection table and falling off.
Further, the workpiece orientation transportation method comprises a workpiece automatic transportation operation performed before the workpiece primary positioning operation and a workpiece overturning orientation operation performed before the workpiece automatic transportation operation. The workpiece overturning and orienting operation is used for overturning and orienting the workpiece, so that each workpiece to be detected is in the same placing state, the subsequent detection of the same part of the workpiece is facilitated, and the objective accuracy of a detection result is favorably ensured.
Further, the workpiece overturning and orienting operation is to vertically drop the machined and formed workpiece onto the overturning direction control inclined plate, and the overturning direction control inclined plate is inclined so that the workpiece falling on the overturning direction control inclined plate is overturned to be in a uniform placing state. The workpiece is turned to a stable state of the center of gravity after falling on the turning direction control inclined plate by utilizing the angle difference of contact between the workpiece and the turning direction control inclined plate when falling and the center of gravity deflection of the workpiece, so that the putting states of the upper end surface and the lower end surface of a plurality of workpieces are consistent.
Further, the automatic workpiece conveying operation is to convey the workpiece with the adjusted placing state to the outer side of the detection table by adopting a motor to drive a conveying belt and convey the workpiece to the detection table through an inclined feeding channel. The conveying belt driven by the motor is used for conveying the workpieces, and the workpieces are fed to the detection table under the action of gravity of the workpieces, so that the automation degree is higher, and the conveying is more efficient.
Further, the primary positioning and buffering operation of the workpiece is to install a primary positioning and buffering stop block right opposite to the feeding channel on the detection table, and the primary positioning and buffering stop block stops, positions and buffers the workpiece sliding down from the feeding channel to the detection table. The mode is adopted to block and buffer the workpiece which slides from the feeding channel onto the detection platform to avoid the workpiece from rushing out of the detection platform, and the initial position of the workpiece on the detection platform is limited, so that the subsequent accurate movement of the workpiece is facilitated, and the detection is facilitated.
Furthermore, in the workpiece dynamic detection method, a strip-shaped through groove is formed in the detection platform, a sliding push block is arranged in the strip-shaped through groove and penetrates through the detection platform, the bottom end of the push block is connected with a first pulling cylinder, one end of the strip-shaped through groove is located between the feeding channel and the primary positioning buffer stop block, and the push block is pulled by the first pulling cylinder to directionally push the workpiece along the strip-shaped through groove. By adopting the mode, the strip-shaped through groove limits the moving track of the push block, the first pulling cylinder supplies power to the push block, the workpiece can directionally move from the initial position along the strip-shaped through groove, and real-time monitoring in the moving process is realized.
Further, in the workpiece size detection method, in the process of directionally pushing the workpiece, the workpiece is subjected to reference positioning from one side of the moving direction of the workpiece, the workpiece is subjected to mechanical size comparison from the other side, and the size comparison result is converted into an optical signal of the laser ranging sensor through light reflection. By adopting the mode, the workpiece is positioned on one side in the directional movement process of the workpiece, the size of the workpiece can be accurately detected relative to the reference on the other side, the change of the size of the workpiece is utilized to trigger the reflection of light, so that the change of the size is converted into the reflection of light at different angles, and then the laser ranging sensor is used for collecting signals, so that the size of the workpiece can be accurately and automatically detected.
And further, the secondary positioning buffering operation is that a secondary positioning buffering stop block is arranged in the directional moving direction of the workpiece after the workpiece size is detected on the detection table to perform positioning and buffering on the workpiece, and the secondary positioning buffering stop block is positioned on the outer side of one end, away from the primary positioning buffering stop block, of the strip-shaped through groove. By adopting the method, the terminal position of the detected workpiece in the directional movement can be limited, the workpiece is prevented from rushing out of the detection table, and the qualified workpiece is prevented from falling and being damaged.
Further, after the workpiece is subjected to the re-positioning buffering operation, the workpiece is pushed to be discharged from the detection platform in the direction perpendicular to the strip-shaped through groove on the detection platform. By adopting the mode to discharge the workpieces, the influence of the workpiece discharge process on the directional moving process of the next workpiece can be avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of an automatic measuring device for a disc-like workpiece;
FIG. 2 is a schematic diagram of the position of the laser ranging sensor for detecting the movable block in FIG. 1;
FIG. 3 is a schematic structural diagram of a light-reflecting surface on the movable block in FIG. 1;
fig. 4 is a schematic view of the structure under the detection substrate in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a detection table 1, a workpiece conveyor belt 2, a longitudinal moving block 3, a disc workpiece 4, a primary positioning buffer stop 5, a detection moving block 6, a cover plate 7, a laser ranging sensor 8, a positioning block 9, a transverse cylinder 10, a transverse moving block 11, a longitudinal cylinder 12, a reference block 13, a light emitting area 14, a light receiving area 15, a detection bulge 16, a strip-shaped through groove 17 and a light reflecting surface 18.
Example (b): an automatic workpiece measuring method comprises a workpiece directional transportation method, a workpiece dynamic detection method and a workpiece buffer positioning method.
The workpiece orientation transportation method comprises a workpiece automatic transportation operation performed before the workpiece primary positioning operation and a workpiece overturning orientation operation performed before the workpiece automatic transportation operation. The workpiece overturning and orienting operation is to vertically drop the machined and formed workpiece onto an overturning direction control inclined plate, and the overturning direction control inclined plate is inclined so that the workpiece falling on the overturning direction control inclined plate is overturned to be in a uniform placing state. The automatic workpiece conveying operation is that a motor is adopted to drive a conveying belt to convey the workpiece with the adjusted placing state to the outer side of the detection platform and convey the workpiece to the detection platform through an inclined feeding channel.
The workpiece buffer positioning method comprises a workpiece primary positioning buffer operation performed before the workpiece dynamic inspection method and a workpiece re-positioning buffer operation performed after the workpiece dynamic inspection method. The workpiece primary positioning and buffering operation is to install a primary positioning and buffering stop block right opposite to the feeding channel on the detection platform, and the primary positioning and buffering stop block is used for stopping, positioning and buffering the workpiece which slides down from the feeding channel to the detection platform.
The workpiece dynamic detection method comprises the steps of carrying out directional movement on a workpiece on a detection table, carrying out workpiece size detection from the side end of the workpiece in the moving process, wherein the workpiece size detection comprises the steps of converting a workpiece size detection result into a laser signal through a detection mechanism, and converting the laser signal into an electric signal through a laser ranging sensor to judge the detection result. According to the workpiece dynamic detection method, a strip-shaped through groove is formed in a detection platform, a sliding push block is arranged in the strip-shaped through groove, the push block penetrates through the detection platform, a first pulling cylinder is connected to the bottom end of the push block, one end of the strip-shaped through groove is located between a feeding channel and a primary positioning buffer stop block, and the push block is pulled by the first pulling cylinder to directionally push the workpiece along the strip-shaped through groove. The workpiece size detection in the workpiece dynamic detection method is to perform reference positioning on a workpiece from one side of the moving direction of the workpiece in the process of directionally pushing the workpiece, perform mechanical size comparison on the workpiece from the other side, and convert the size comparison result into an optical signal of a laser ranging sensor through light reflection.
The secondary positioning buffering operation is that a secondary positioning buffering stop block is arranged in the directional moving direction of the workpiece after the workpiece size is detected on the detection table to stop, position and buffer the workpiece, and the secondary positioning buffering stop block is positioned on the outer side of one end, far away from the primary positioning buffering stop block, of the strip-shaped through groove. After the workpiece is subjected to the repositioning and buffering operation, the workpiece is pushed to be discharged from the detection platform in the direction perpendicular to the strip-shaped through groove on the detection platform.
The specific implementation process is as follows: as shown in fig. 1, the automatic measuring device for disc workpieces provided in the present embodiment comprises a detection table 1, wherein one end of the detection table 1 is a feeding end, the other end of the detection table 1 is a discharging end, a feeding channel is installed on the feeding end through a screw, the feeding channel is an inclined sliding plate, a discharging plate is installed on the discharging end through a screw, and the feeding channel and the discharging plate are located on the same side of the detection table 1. And a primary positioning buffer stop block 5 which is opposite to the feeding end is arranged on the detection table 1 through a screw. The feeding end is provided with a feeding conveying mechanism, the feeding conveying mechanism in the embodiment comprises a workpiece conveyor belt 2, and the mechanism for conveying the workpiece conveyor belt 2 is not described in detail in the embodiment. The discharge end is equipped with feeding mechanism, and feeding mechanism in this embodiment includes through the horizontal cylinder 10 of screw installation on examining test table 1, and horizontal cylinder 10 is located the opposite of ejection of compact board, installs horizontal movable block 11 through the screw on the cylinder pole of horizontal cylinder 10. A detection mechanism is arranged between the feeding end and the discharging end, and as shown in a combined figure 2, the detection mechanism in the implementation comprises a reference block 13, a laser ranging sensor 8 with the model of loose hg-c1030 and a detection movable block 6, and arc surfaces are arranged on corners of the reference block 13. Detect and be fixed with the locating piece 9 that is located between laser range sensor 8 and the reference block 13 through the mounting screw on the platform 1, detect movable block 6 sliding connection on locating piece 9, the concrete sliding mode that detects movable block 6 and locating piece 9 is: the positioning block 9 is provided with a sliding groove, and the detection movable block 6 is connected in the sliding groove in a sliding manner. A cover plate 7 which is arranged on the positioning block 9 through a screw is arranged above the detection movable block 6. A first pressure spring (not shown) for urging the movable detection block 6 to slide toward the reference block 13 is connected between the movable detection block 6 and the positioning block 9. The side of the detection movable block 6 facing the reference block 13 is provided with a detection protrusion 16, and as shown in fig. 3, the side of the detection movable block 6 facing the laser distance measuring sensor 8 is a reflective surface 18, and the reflective surface 18 in this embodiment is a reflector. As shown in fig. 4, the detection table 1 is provided with a material pushing mechanism for moving the disc-like workpiece 4 from the feeding end to the discharging end, the material pushing mechanism in this embodiment includes a longitudinal cylinder 12 located below the detection table 1, the detection table 1 is provided with a strip-shaped through groove 17, a longitudinal moving block 3 is detachably connected to a cylinder rod of the longitudinal cylinder 12, the longitudinal moving block 3 is located above the detection table 1, the longitudinal moving block 3 passes through the strip-shaped through groove 17, and the lower end of the longitudinal moving block 3 is detachably connected to the cylinder rod of the longitudinal cylinder 12 through a nut.
When the device is used, the disc type workpieces 4 with grooves turned are conveyed to the feeding channel from the workpiece conveying belt 2 and slide to the detection table 1 along the feeding channel, and the disc type workpieces 4 sliding to the detection table 1 are stopped on the side face of the longitudinal moving block 3 under the blocking of the primary positioning buffer stop 5. The longitudinal cylinder 12 is started, the cylinder rod of the longitudinal cylinder 12 pulls the longitudinal moving block 3 to move towards the direction of the discharging end, the longitudinal moving block 3 pushes the disc type workpiece 4 to slide towards the direction of the discharging end, and when the disc type workpiece 4 passes through the detection mechanism, the detection mechanism detects the groove of the disc type workpiece 4. After the groove detection of the disc-like workpiece 4 is completed, the disc-like workpiece 4 moves to the side of the lateral movement block 11. Then start horizontal cylinder 10, horizontal cylinder 10 promotes horizontal moving block 11 and removes to the play flitch direction, and horizontal moving block 11 will set class work piece 4 and push into the play flitch, set class work piece 4 from a play flitch roll-off to realize automatic discharging, need not artifical ejection of compact, easy operation is convenient.
The following describes in detail how the detection mechanism detects the groove of the disc-like workpiece 4. Referring to fig. 2, when the disc-type workpiece 4 passes through the reference block 13 and the detection movable block 6, the detection protrusion 16 of the detection movable block 6 abuts against the groove of the disc-type workpiece 4, the groove processing depth of the disc-type workpiece 4 enables the detection protrusion 16 to push the detection movable block 6 to slide towards the direction close to the laser ranging sensor 8, the laser sensor is provided with a light emitting area 14 and a light receiving area 15, the light emitting area 14 of the laser sensor emits laser, the laser irradiates the light reflecting surface 18, the light reflecting surface 18 reflects the laser to the light receiving area 15, and the laser sensor receives the reflected laser. If the disc-like workpiece 4 meets the standard, the position where the laser light is reflected to the light receiving area 15 does not change. If the disc type workpiece 4 does not meet the standard, namely the detection protrusions 16 extend into different groove depths on the disc type workpiece 4, so that the position of the detection movable block is changed, the position and the angle of the reflection surface 18 are changed along with the detection movable block 6, namely the position of the detection movable block 6 is different from that of the laser ranging sensor 8, the laser angle reflected by the reflection surface 18 and the position reflected to the light receiving area 15 are changed, the laser sensor obtains a change value and outputs an electric signal to know that the groove of the disc type workpiece 4 is unqualified to process, and therefore the measurement of the disc type workpiece 4 is achieved. When the disc-like workpiece 4 slides away from the detection mechanism, the first pressure spring is used for resetting the detection movable block 6.
Claims (8)
1. An automatic measuring method of a workpiece, characterized in that: the workpiece dynamic detection method comprises the steps of directionally moving the workpiece on a detection table, and carrying out workpiece size detection from the side end of the workpiece in the moving process, wherein the workpiece size detection comprises the steps of converting a workpiece size detection result into a laser signal through a detection mechanism, and converting the laser signal into an electric signal through a laser ranging sensor to judge the detection result; according to the dynamic workpiece detection method, a strip-shaped through groove is formed in a detection platform, a sliding push block is arranged in the strip-shaped through groove, the push block penetrates through the detection platform, the bottom end of the push block is connected with a first pulling cylinder, one end of the strip-shaped through groove is located between a feeding channel and a primary positioning buffer stop block, and the push block is pulled by the first pulling cylinder to directionally push the workpiece along the strip-shaped through groove; the workpiece size detection in the workpiece dynamic detection method is that the workpiece is subjected to benchmark positioning from one side of the moving direction of the workpiece in the process of directionally pushing the workpiece, the workpiece is subjected to mechanical size comparison from the other side, the size comparison result is converted into an optical signal of a laser ranging sensor through light reflection, the detection mechanism comprises a benchmark block, the laser ranging sensor and a detection movable block, an arc surface is arranged on the corner of the benchmark block, a positioning block positioned between the laser ranging sensor and the benchmark block is fixedly arranged on a detection table, the detection movable block is connected to the positioning block in a sliding manner, and the specific sliding manner of the detection movable block and the positioning block is as follows: the positioning block is provided with a sliding groove, the movable block is connected in the sliding groove in a sliding mode, a cover plate installed on the positioning block is arranged above the movable block, a first pressure spring enabling the movable block to slide towards the direction close to the reference block is connected between the movable block and the positioning block, a detection bulge is arranged on the side face, facing the laser ranging sensor, of the movable block, and the reflection face is a reflector.
2. The method of automatically measuring a workpiece according to claim 1, wherein: the workpiece buffer positioning method comprises a workpiece primary positioning buffer operation performed before the workpiece dynamic inspection method and a workpiece re-positioning buffer operation performed after the workpiece dynamic inspection method.
3. The method of automatically measuring a workpiece according to claim 2, wherein: the workpiece orientation transportation method comprises a workpiece automatic transportation operation performed before the workpiece primary positioning operation and a workpiece overturning orientation operation performed before the workpiece automatic transportation operation.
4. The method of automatically measuring a workpiece according to claim 3, wherein: the workpiece overturning and orienting operation is to vertically drop the machined and formed workpiece onto the overturning direction control inclined plate, and the overturning direction control inclined plate is inclined so that the workpiece falling on the overturning direction control inclined plate is overturned to be in a consistent placing state.
5. The method of automatically measuring a workpiece according to claim 4, wherein: the automatic workpiece conveying operation is that the conveying belt is driven by a motor to convey the workpiece with the adjusted placing state to the outer side of the detection table and convey the workpiece to the detection table through the inclined feeding channel.
6. The method of automatically measuring a workpiece according to claim 5, wherein: the workpiece primary positioning and buffering operation is that a primary positioning and buffering stop block which is right opposite to the feeding channel is installed on the detection platform, and the primary positioning and buffering stop block stops, positions and buffers a workpiece which slides down from the feeding channel to the detection platform.
7. The method of automatically measuring a workpiece according to claim 6, wherein: the secondary positioning buffering operation is that a secondary positioning buffering stop block is arranged in the directional moving direction of the workpiece after the workpiece size is detected on the detection table to stop, position and buffer the workpiece, and the secondary positioning buffering stop block is positioned on the outer side of one end, away from the primary positioning buffering stop block, of the strip-shaped through groove.
8. The method of automatically measuring a workpiece according to claim 7, wherein: after the workpiece is subjected to the repositioning and buffering operation, the workpiece is pushed to be discharged from the detection platform in the direction perpendicular to the strip-shaped through groove on the detection platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810849580.XA CN109141231B (en) | 2018-07-28 | 2018-07-28 | Automatic measuring method for workpiece |
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| CN201810849580.XA CN109141231B (en) | 2018-07-28 | 2018-07-28 | Automatic measuring method for workpiece |
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| CN109141231A CN109141231A (en) | 2019-01-04 |
| CN109141231B true CN109141231B (en) | 2020-05-29 |
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| CN108332703A (en) * | 2018-04-23 | 2018-07-27 | 吉林省金沙数控机床股份有限公司 | A kind of disc type work accuracy detecting device |
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2018
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Patent Citations (7)
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| KR20140144416A (en) * | 2013-06-11 | 2014-12-19 | 주식회사 제이미크론 | Auto Rereeler System |
| CN105258646A (en) * | 2015-11-06 | 2016-01-20 | 项俊俊 | Diamond cutter head parameter detection apparatus |
| CN105964555A (en) * | 2016-06-24 | 2016-09-28 | 龙彦旭 | Automatic measuring and separating device for diameter of cylindrical roller |
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Denomination of invention: An Automatic Measurement Method for Workpieces Effective date of registration: 20230912 Granted publication date: 20200529 Pledgee: Liangjiang branch of Chongqing Rural Commercial Bank Co.,Ltd. Pledgor: CHONGQING HONGGANG CNC MACHINE Co.,Ltd. Registration number: Y2023500000068 |