CN111412866A - Mobile measuring device for detecting straightness of working edge of knife edge-shaped ruler - Google Patents
Mobile measuring device for detecting straightness of working edge of knife edge-shaped ruler Download PDFInfo
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- CN111412866A CN111412866A CN202010401083.0A CN202010401083A CN111412866A CN 111412866 A CN111412866 A CN 111412866A CN 202010401083 A CN202010401083 A CN 202010401083A CN 111412866 A CN111412866 A CN 111412866A
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- edge
- knife
- ruler
- measuring device
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
Abstract
The invention discloses a mobile measuring device for detecting the straightness of a working edge of a knife-edge-shaped ruler, which comprises a frame, a grinding surface leveling ruler and a switching power supply, wherein the bottom end of the frame is provided with a clamping and centering device and a rotary driving device connected with the clamping and centering device, the top end of the frame is provided with a light measuring device through the mobile device, the signal output end of the light measuring device is connected with the input end of a control system, and the controlled ends of the clamping and centering device and the rotary driving device are respectively connected with the output end of the control system. The invention can realize the movement detection of the knife-edge-shaped ruler, feed back detection signals to the control system, realize the calculation of detection data through the control system, compare the detection data with standard data, and further automatically judge the straightness condition of the working edge of the knife-edge-shaped ruler, effectively avoid the influence of human factors, and greatly improve the detection precision and the detection efficiency.
Description
Technical Field
The invention relates to the technical field of precision measurement, in particular to a mobile measuring device for detecting the straightness of a working edge of a knife-edge-shaped ruler.
Background
The knife-edge-shaped ruler is a measuring instrument with a measuring surface in a knife-edge shape and used for measuring plane shape errors of workpieces, is widely applied to the field of flatness and straightness detection of flat plates, flat rulers, machine tool workbenches, guide rails and precision workpieces, has the advantages of simple structure, light weight, no rustiness, convenience in operation, high measuring efficiency and the like, is a measuring tool commonly used for machining, and mainly has the specifications of 75mm, 125mm, 175mm, 200mm, 225mm, 300mm, 400mm, 500mm and the like according to the length of a working edge of the measuring tool.
The verification basis of the knife edge-shaped ruler is JJG 63-2007 'knife edge-shaped ruler' verification regulation, and the straightness of the working edge of the knife edge-shaped ruler is detected by using a polished surface leveling ruler with effective length not less than the length of the working edge of the knife edge-shaped ruler by a light gap method. The edge-shaped straightedges of 175mm and below were measured by direct method and those of 175mm and above were measured by comparative method.
The main verification project is working edge straightness, the straightness of the working edge is measured by a light gap method, a light-transmitting gap is observed by human eyes, and the width of the corresponding light gap is judged according to visible light color, so that the straightness of the working edge of the knife edge-shaped ruler is subjected to qualitative analysis. When a knife edge-shaped ruler with the diameter of 175mm or less is measured, a light-transmitting gap is observed, if no visible light gap exists or visible blue light exists, the straightness of a working edge is not more than l mu m; otherwise, the straightness of the working edge is more than l mu m. When a straight edge with a notch shape of more than 175mm is measured, the maximum gap of the light-transmitting gap is used as a measurement result, and the value can be determined by comparing with a standard gap. For a knife edge with a working edge length of 300mm or more, the hand-held knife edge should be positioned 2/9 away from the two ends and support most of the weight of the knife edge when measuring.
According to the regulation requirement, the traditional method for calibrating the straightness of the working edge of the knife-edge-shaped ruler has the following defects:
1) the whole verification process uses a plurality of types of standard instruments and supporting equipment, the standard instruments and the supporting equipment need to be placed again in each verification, and the standard clearance building and disassembling time is long.
2) The direct measurement method is adopted when the edge-shaped ruler with the diameter of 175mm or less is verified, or the comparison method is adopted when the edge-shaped ruler with the diameter of 175mm or more is verified, the judgment is made completely by means of human eye observation and experience, the verification result needs human eye photosensitive comparison, the influence of human factors is large, the verification precision is low, misjudgment is easy to occur, and the requirements of modern industrial development cannot be completely met.
Human eyes cannot accurately compare the colors of two color lights only by visual information, and in addition, the vision of each observer is different, the observed colors are different, and a large measurement error is introduced.
3) When the calibration is carried out, the straight edge with the shape of the notch needs to be supported by hands, the calibration result is influenced by the difference of the hand-holding force of different operators, the calibration conclusion is inconsistent, the detection result is easily influenced by human factors, the manpower and the time are wasted, and the calibration efficiency is low.
4) During verification, the parallelism of the grinding surface flat ruler below the knife edge-shaped straight ruler and the knife edge-shaped straight ruler cannot be guaranteed, and deviation is easy to occur to influence the verification result.
5) Only the part of the working edge of the knife edge-shaped ruler can be detected, the working edge of the whole knife edge-shaped ruler cannot be quickly detected, if the working edge of the whole knife edge-shaped ruler is detected, the positions of a light source and a light box for receiving the light source need to be changed for many times, so that the detection efficiency is low, and the detection precision is not high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a mobile measuring device for detecting the straightness of the working edge of the knife-edge-shaped ruler, so as to solve the problems of long standard gap building and disassembling time, large influence of human factors, low detection efficiency, easy influence of detection results and low detection efficiency of the traditional detection method for the straightness of the working edge of the knife-edge-shaped ruler, avoid judging the straightness of the working edge of the knife-edge-shaped ruler by human eye observation and experience, improve the detection precision and the detection efficiency and realize the purpose of automatic detection.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A movable measuring device for detecting the straightness of a working edge of a knife-edge-shaped ruler comprises a rack, a grinding surface leveling ruler for supporting the knife-edge-shaped ruler and a switching power supply for supplying electric energy to the whole device, wherein a clamping and centering device for clamping and centering the knife-edge-shaped ruler and a rotary driving device which is connected with the clamping and centering device and used for driving the clamping and centering device and the knife-edge-shaped ruler to rotate are arranged on the rack, a light measuring device for realizing movable measurement of the straightness of the working edge of the knife-edge-shaped ruler under the driving of the moving device is arranged at the top end of the rack through the moving device, the signal output end of the light measuring device is connected to the input end of a control system for controlling the whole operation of the device, and the controlled ends of the clamping and centering device and the rotary driving.
According to the technical scheme, the control system comprises a motion controller for collecting and controlling data, and the motion controller is connected with an upper computer through an industrial personal computer in an interactive communication mode.
According to the technical scheme, the moving device comprises an electric cylinder fixedly arranged at the top end of the rack and a moving sliding block which is arranged on the moving end of the electric cylinder in a sliding fit mode and partially extends out of the electric cylinder.
The technical scheme is further optimized, the light measuring device comprises a laser and a spectrometer, the laser is arranged on the movable sliding block in a collinear mode through a micrometer feeding type XYZ manual displacement platform and located on two sides of the knife edge-shaped ruler, the laser is used for emitting laser to the light transmission gap of the knife edge-shaped ruler, the spectrometer is used for receiving the light intensity of the laser transmitted from the light transmission gap of the knife edge-shaped ruler, the laser and the spectrometer are located on the same horizontal straight line with the light transmission gap of the knife edge-shaped ruler, the controlled end of the laser is connected to the output end of the motion controller, and the signal output end of the spectrometer is.
The technical scheme is further optimized, and the laser is an adjustable blue ray laser.
According to the technical scheme, the micrometer feeding type XYZ manual displacement platform is further provided with a position signal collector used for collecting laser intensity data of the light measuring device corresponding to the position of the knife edge-shaped straight edge and the deflection angle of the knife edge-shaped straight edge, and a signal output end of the position signal collector is connected to a signal input end of the motion controller.
According to the technical scheme, the outer wall of the electric cylinder is provided with a position limiting device used for limiting the moving stroke of the light measuring device, and the signal output end of the position limiting device is connected to the signal input end of the motion controller.
According to the technical scheme, the clamping and centering device comprises two positioning seats vertically arranged at the bottom end of the rack, the grinding surface flat ruler is arranged between the two positioning seats, and the bottom end of the grinding surface flat ruler is limited and arranged on a leveling mechanism for adjusting the flatness of the grinding surface flat ruler through a grinding surface flat ruler limiting structure; the top ends of the opposite side walls of the two positioning seats are detachably provided with clamping mechanisms used for clamping and centering the knife-edge-shaped straight ruler left and right through a rotary driving device.
Further optimize technical scheme, the rotation driving device includes that the stiff end sets up on the right side positioning seat and the drive shaft end stretches out the driving motor of right side positioning seat, with driving motor's drive shaft fixed connection's first drive carousel and rotate the second drive carousel that sets up on the positioning seat of left side and with the coaxial setting of first drive carousel.
Further optimize technical scheme, fixture is including fixed two pneumatic clamping jaws that set up respectively on first drive carousel and second drive carousel lateral wall, can dismantle respectively between the clamping jaw end of two pneumatic clamping jaws that set up with the water flat line and be connected with the grip block that is used for controlling the centre gripping centering to the knife-edge shape ruler, has certain interval between the bottom face of grip block and the top face of grinding surface ruler.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The measuring method of the light transmission intensity by the optical fiber spectrometer is applied to the qualitative analysis of the straightness of the working edge of the knife-edge-shaped ruler, the knife-edge-shaped ruler is centered, clamped and rotated by the clamping centering device and the rotation driving device, the knife-edge-shaped ruler can realize movement detection by arranging the moving device at the top end of the rack and arranging the light measuring device on the moving device, a detection signal can be fed back to the control system, the detection data can be calculated by the control system and compared with standard comparison data, the straightness condition of the working edge of the knife-edge-shaped ruler can be automatically judged, the influence of human factors is effectively avoided, manual support is not needed, and the detection precision and the detection efficiency are greatly improved.
The straightness calibrating device for the working edge of the knife-edge-shaped ruler can realize an automatic calibrating process, improves the working efficiency, overcomes the influence of human factors on a detection result, and improves the calibrating accuracy.
The invention adopts a comparison method for detecting the straightness of the working edge of the knife edge-shaped ruler, namely, standard gap data is used as a reference value to be compared with the straightness data of the edge of the knife edge to be detected. Meanwhile, in order to ensure the accuracy and stability of the device, the device can be verified and calibrated by a higher-level standard device.
The micrometer feeding type XYZ manual displacement platform is used for adjusting the focusing and overall process structure, and the use of the XYZ manual displacement platform ensures that the receiving device receives the light transmission of the gap to the maximum extent.
The control system provided by the invention realizes the control of the whole verification process, ensures no human factor interference in the data acquisition process, communicates with the spectrometer, automatically acquires, converts, analyzes, records and stores experimental data, improves the working efficiency and reduces the verification cost.
The speed of the displacement stepping motor can be adjusted, so that the speed of the movable sliding block can be adjusted. The development of the speed-adjustable mechanical slide rail effectively ensures that the relative distance between the cutting edge of the knife edge ruler and the laser and the spectrometer is not changed, and the purpose of improving the sampling precision is achieved by changing the moving speed of the movable slide block.
The bottom end of the grinding surface flat ruler is limited and arranged on the leveling mechanism through the grinding surface flat ruler limiting structure, and the notch-shaped straight ruler is effectively clamped and positioned through the clamping mechanism, so that the straightness of the working edge of the notch-shaped straight ruler is verified without being supported by hands, the influence of human factors is avoided, the verification efficiency is greatly improved, the phenomenon of shaking is avoided in the verification process, the parallelism of the grinding surface flat ruler and the notch-shaped straight ruler can be effectively guaranteed, and the verification precision is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of another embodiment of the present invention;
FIG. 4 is a schematic view of a connection structure of a mobile device and a light measuring device according to the present invention;
FIG. 5 is a schematic view of another connection structure of the mobile device and the light measuring device according to the present invention;
FIG. 6 is a partial cut-away view of the mobile device of the present invention (the lead screw not shown);
FIG. 7 is a schematic view of a light measuring device according to the present invention;
FIG. 8 is a schematic view of another optical measurement device according to the present invention;
FIG. 9 is a schematic view of a connection structure of the clamping and centering device and the rotation driving device according to the present invention;
FIG. 10 is a schematic view of another connection structure of the clamping and centering device and the rotation driving device according to the present invention;
FIG. 11 is a front view of FIG. 9 of the present invention;
FIG. 12 is a top view of FIG. 9 in accordance with the present invention;
FIG. 13 is a schematic view of the clamping mechanism of the clamping pair center of the present invention;
FIG. 14 is a schematic structural view of a first driving turntable in the rotary driving apparatus according to the present invention;
FIG. 15 is a schematic structural view of a second driving turntable in the rotary driving apparatus according to the present invention;
fig. 16 is a diagram showing a control system according to the present invention.
Wherein: 1. the frame 11, the top plate 12, the bottom plate 13, the side plates 131 and the motor are provided with through holes;
2. the moving device 21, the cylinder barrel 22, the displacement stepping motor 23, the moving slide block 24 and the moving connecting transverse plate;
3. the device comprises a light ray measuring device, 31, a micrometer feeding type XYZ manual displacement platform, 311, a first fixed connecting plate, 312, a first platform, 313, a first L type connecting plate, 314, a first micrometer, 315, a first limiting column, 316, a second platform, 317, a third platform, 318, a second L type connecting plate, 319, a second micrometer, 320, a second limiting column, 321, a fourth platform, 322, a second fixed connecting plate, 323, a fifth platform, 324, a sixth platform, 325, a third L type connecting plate, 326, a third micrometer, 327, a spectrometer positioning plate, 328, a laser positioning plate, 329, a third limiting column, 32, a spectrometer, 33 and a laser;
4. the clamping and centering device 41, the clamping mechanism 411, the pneumatic clamping jaw 412 and the clamping plate; 42. a grinding surface leveling ruler; 44. a leveling mechanism 441, a leveling plate 442 and a leveling knob; 45. a leveling plate limiting structure 451, a leveling plate limiting block 452 and a U-shaped sliding groove; 46. a grinding surface flat ruler limit structure 461 and a grinding surface flat ruler limit block; 47. positioning seats;
5. a rotary driving device 51, a driving motor 52, a first driving turntable 521, a first driving shaft 522, a first turntable 53, a second driving turntable 531, a second driving shaft 532, a second turntable 54, a first connecting plate 55 and a second connecting plate; 6. a knife-edge-shaped ruler;
7. position limiting device, 71, first travel switch, 72, second travel switch, 73, touch pad.
Detailed Description
The invention will be described in further detail below with reference to the figures and specific examples.
A mobile measuring device for detecting the straightness of a working edge of a knife-edge-shaped ruler is shown in a combined mode in figures 1 to 16 and comprises a machine frame 1, a grinding surface flat ruler 42, a clamping and centering device 4, a rotary driving device 5, a light measuring device 3, a switching power supply and a control system.
The measuring range of the invention is (75-500) mm, and the adjusting angle is-15 to +15 degrees.
The frame 1 comprises a top plate 11, a bottom plate 12 and side plates 13. The side plates 13 are provided in two for connecting the top plate 11 and the bottom plate 12.
The grinding surface flat ruler 42 is used for supporting the knife edge-shaped straight ruler 6, the grinding surface flat ruler 42 in the invention adopts a 500mm grinding surface flat ruler, the grinding surface flat ruler 42 is used as a standard device, and the flatness of a working surface does not exceed 0.5 mu m. And selecting a knife edge-shaped ruler 6 with 500mm precision meeting the requirement to ensure that the measurement range of the device reaches 500 mm.
The switching power supply is used for providing electric energy for the whole device and can supply power at 220V.
The control system comprises a motion controller for collecting and controlling data, and the motion controller is connected with an upper computer through an industrial personal computer in an interactive communication manner.
The top of frame 1 is provided with light measuring device 3 through mobile device 2, and light measuring device 3 is used for realizing moving under the drive of mobile device 2 and measures the knife edge straightness accuracy of shape ruler work, and light measuring device 3's signal output part connects in the input that is used for the control system of the whole function of controlling means.
The moving device 2 comprises an electric cylinder fixedly arranged at the top end of the frame 1 and a moving slide block 23 which is arranged on the moving end of the electric cylinder in a sliding fit mode and partially extends out of the electric cylinder.
The electric cylinder comprises a cylinder barrel 21, a lead screw, a displacement stepping motor 22, a lead screw and a gear train structure. The top of cylinder 21 is fixed the setting in roof 11 bottom of frame 1 through a plurality of stands, and mechanical slide rail has been seted up to the bottom of cylinder 21. The lead screw is rotatably arranged at both ends of the cylinder 21 through bearings. The movable sliding block 23 is assembled in the mechanical sliding rail, and part of the movable sliding block extends out of the mechanical sliding rail and is assembled with the screw rod.
The electric cylinder is 800MM stroke large displacement electric cylinder, and the repetition precision is +/-0.005 MM.
The displacement stepping motor 22 is connected with the lead screw through a gear train structure, and the fixed end of the displacement stepping motor 22 is fixedly arranged on the side wall of the cylinder 21. The gear train structure includes driving gear and driven gear, and the driving gear is fixed connection with displacement step motor 22's output shaft end, driven gear and lead screw fixed connection, driving gear and driven gear intermeshing. The displacement stepping motor 22 can drive the driving gear, the driven gear and the lead screw to rotate, and further drive the movable sliding block 23 to slide in the mechanical sliding rail, so that the purpose of movement detection of the light measuring device 3 is achieved.
The speed of the displacement stepper motor 22 can be adjusted so that the speed of the moving slide 23 is adjustable. The development of the speed-adjustable mechanical slide rail effectively ensures that the relative distance between the cutting edge of the knife edge ruler and the laser and the spectrometer is not changed, and the purpose of improving the sampling precision is achieved by changing the moving speed of the movable slide block.
In the invention, the displacement stepping motor 22 is connected with a stepping motor driver which is a digital stepping driver, and a 32-bit DSP processor is adopted, so that optimal control parameters can be automatically generated, the performance of the motor can be exerted to a large extent, and the motor can run to achieve three-super performance of ultra-stability, ultra-low noise and ultra-low heat. The stepper motor driver consists of a driver and a Rasai control card. The controlled end of the stepper motor driver is connected to the output end of the motion controller.
The light measuring device 3 comprises a laser 33 and a spectrometer 32 which are respectively arranged on the movable slide block 23 in a collinear manner through a micrometer feeding type XYZ manual displacement platform 31 and are positioned on two sides of the knife-edge-shaped straight scale 6.
The laser 33 is used for emitting laser to the light transmission gap of the knife edge-shaped ruler, the laser emitted by the laser 33 can be used as a light source, and the controlled end of the laser 33 is connected to the output end of the motion controller. The laser 33 in the present invention is an adjustable blue light laser, which is used as a light source, and the wavelength is determined to be 495-530 nm. According to the invention, the blue line laser is used for replacing an incandescent lamp light source, so that the influence of polychromatic light formed after single-slit diffraction on subsequent verification is effectively avoided.
The blue line laser with adjustable frequency is selected as a light source. From the slit light transmission characteristics, it is found that the red laser light cannot transmit the slit having a width of less than 1.25 μm, and the blue laser light can pass through all the slits having a width of more than 0.8 μm. The laser has the characteristics of good directivity and single color, and compared with an incandescent lamp in the traditional knife-edge-shaped ruler verification scheme, the line laser with a single waveband can avoid the influence of various color lights formed after diffraction by a single slit on subsequent work.
Laser 33 wavelength in the present invention: 450nm, power: 100mW, working voltage: DC 2.8V-5.2V, working current: less than 200 mA.
The spectrometer 32 is used for receiving the light intensity of the laser transmitted through the light transmission gap of the knife edge-shaped ruler, the laser 33, the spectrometer 32 and the light transmission gap of the knife edge-shaped ruler are positioned on the same horizontal straight line, and the signal output end of the spectrometer 32 is connected to the input end of the motion controller. The spectrometer 32 of the present invention employs an FX2000 fiber optic spectrometer. And measuring the light transmission intensity by using a spectrometer, thereby qualitatively analyzing the straightness of the working edge of the knife edge-shaped ruler.
The spectrometer 32 of the invention adopts a large-caliber optical fiber collimating mirror, so that the processing precision of the mobile device is greatly reduced while the receiving range of the transmitted light intensity is enlarged.
The spectrometer of the invention has 32 wave bands: 380 nm-960 nm, integration time: 1ms to 60 s. Straight-through optical fiber core diameter: 600, wave band: 200nm to 1100 nm. The wave band of the fiber collimator: 200 nm-2500 nm, light transmission caliber: 25.4mm, numerical aperture: 0.22.
the control system realizes the control of the whole verification process, ensures no human factor interference in the data acquisition process, communicates with the spectrometer, automatically acquires, converts, analyzes, records and stores experimental data, improves the working efficiency and reduces the verification cost.
The micrometer feeding type XYZ manual displacement platform 31 is fixedly connected to the bottom end of the movable slide block 23 through a movable connecting transverse plate 24. The micrometer feeding type XYZ manual displacement platform 31 is used for adjusting the light alignment and the whole process structure, and the use of the micrometer feeding type XYZ manual displacement platform 31 ensures that the receiving device receives light transmission of a gap to the maximum extent.
The micrometer feeding type XYZ manual displacement stage 31 includes a first fixed connection plate 311, an X-direction feeding structure, a Y-direction feeding structure, and a Z-direction feeding structure. The first fixed connecting plate 311 is an i-shaped fixed connecting plate, and the top end of the first fixed connecting plate 311 is fixed with the movable connecting transverse plate 24.
The X-direction feeding structure comprises a first platform 312, a second platform 316, a first L-shaped connecting plate 313, a first micrometer 314, a first limiting column 315, a first limiting plate and a first screw, wherein the first platform 312 is fixed with a first fixed connecting plate 311, the bottom end of the first platform 312 is provided with a sliding rail, the top end of the second platform 316 is provided with a sliding block, the second platform 316 is assembled with the first platform 312 in a sliding manner, the first L-shaped connecting plate 313 is fixed with the first platform 312, the first micrometer 314 is rotationally connected with the first L-shaped connecting plate 313 and is connected with the first screw, the first screw is assembled and connected with the second platform 316, the second platform 316 can be driven to slide when the first screw rotates, the first limiting plate is fixedly arranged on the first platform 312, the first limiting column 315 penetrating through the U-shaped groove is arranged on the first platform 316, and the first limiting column 315 can limit the moving position of the second platform 316.
The Y-direction feeding structure comprises a third platform 317, a fourth platform 321, a second L-shaped connecting plate 318, a second micrometer 319, a second limiting column 320, a second limiting plate and a second screw rod, wherein the third platform 317 is fixed with the second platform 316, the bottom end of the third platform 317 is provided with a sliding rail, the top end of the fourth platform 321 is provided with a sliding block, the fourth platform 321 is in sliding fit with the third platform 317, the second L-shaped connecting plate 318 is fixed with the third platform 317, the second micrometer 319 is in rotating connection with the second L-shaped connecting plate 318 and is connected with the second screw rod, the second screw rod is in fitting connection with the fourth platform 321, the fourth platform 321 can be driven to slide when the second screw rod rotates, the second limiting plate is fixedly arranged on the third platform 317, a U-shaped groove is formed in the second limiting plate, the fourth platform 321 is fixedly provided with the second limiting column 320 penetrating through the U-shaped groove, and the arranged second limiting column 320 can limit the moving position of the fourth platform 321.
The Z-direction feeding structure comprises a second fixed connecting plate 322, a fifth platform 323, a sixth platform 324, a third L-shaped connecting plate 325, a third micrometer 326, a third limiting column 329, a third limiting plate and a third screw, wherein the second fixed connecting plate 322 is of a T-shaped structure, the second fixed connecting plate 322 is fixed with the fourth platform 321, the fifth platform 323 is vertically arranged and fixed with the side surface of the second fixed connecting plate 322, a sliding rail is arranged on the side wall of the fifth platform 323, the sixth platform 324 is vertically arranged, a sliding block assembled with the sliding rail is arranged on the sixth platform 324, the sixth platform 324 and the fifth platform 323 are slidably assembled, the third L-shaped connecting plate 325 and the sixth platform 324 are fixed, the third micrometer 326 is rotatably arranged on the third L-shaped connecting plate 325, the third screw is connected with the third micrometer 326, the third screw 323 is assembled with the fifth platform 323, when the third screw rotates, the sixth screw can drive the sixth platform L to slide on the sixth platform 324, the third platform 324 is fixedly arranged on the sixth platform 324, a U-shaped positioning plate 327 is fixedly arranged on the left side of the laser positioning plate 328, and a laser positioning plate 328 is connected with a laser positioning plate 329 fixedly arranged on which is fixedly arranged on the laser positioning plate 328.
The micrometer feeding type XYZ manual displacement platform 31 is also provided with a position signal collector, the position signal collector is used for collecting laser intensity data of the light measuring device 3 corresponding to the position of the knife edge-shaped ruler 6 and the deflection angle of the knife edge-shaped ruler 6, and a signal output end of the position signal collector is connected to a signal input end of the motion controller.
And a position limiting device 7 for limiting the moving stroke of the light measuring device 3 is arranged on the outer wall of the electric cylinder, and the signal output end of the position limiting device 7 is connected to the signal input end of the motion controller. The position restricting device 7 includes a first stroke switch 71 and a second stroke switch 72 that are provided on a side wall of the cylinder 21 at intervals. The moving slider 23 is provided with a touch pad 73 extending outward, and when the touch pad 73 touches the first travel switch 71 or the second travel switch 72, the first travel switch 71 or the second travel switch 72 will feed back a position signal of the light measurement device to the motion controller, so as to control the moving device 2 to stop moving.
The machine frame 1 is provided with a clamping and centering device 4 for clamping and centering the knife-edge-shaped ruler 6 and a rotary driving device 5 which is connected with the clamping and centering device 4 and used for driving the clamping and centering device 4 and the knife-edge-shaped ruler 6 to rotate, and controlled ends of the clamping and centering device 4 and the rotary driving device 5 are respectively connected with an output end of a control system.
The clamping and centering device 4 comprises a positioning seat 47, a grinding surface flat rule limiting structure 46, a leveling mechanism 44 and a clamping mechanism 41.
The positioning seats 47 are provided with two and vertically arranged on the bottom plate 12.
The bottom end of the grinding surface flat ruler 42 is limited and arranged on the leveling mechanism 44 through the grinding surface flat ruler limiting structure 46, and the leveling mechanism 44 is used for adjusting the flatness of the grinding surface flat ruler 42.
The leveling mechanism 44 includes a leveling plate 441 disposed on the base plate 12 by at least three leveling knobs 442, and the leveling plate 441 of the present invention is disposed on the base plate 12 by three leveling knobs 442, so that the leveling of the leveling plate 441 is more stable.
The grinding surface flat limit structure 46 includes a plurality of pairs of grinding surface flat limit blocks 461 connected to the top end surface of the leveling plate 441. Two pairs of grinding surface leveling rule limiting blocks 461 are arranged in the invention.
The rotation driving device 5 includes a driving motor 51, a first driving turntable 52, and a second driving turntable 53.
The fixed end of the driving motor 51 is arranged on the right side positioning seat, the driving shaft end extends out of the right side positioning seat, and the driving motor 51 is connected with the right side positioning seat through a bearing. The driving motor 51 can drive the knife-edge-shaped ruler 6 to incline 15 degrees left and right according to the verification rule. A motor through hole 131 is formed in the side plate 13 on the right side, and the driving motor 51 passes through the motor through hole 131.
The driving motor 51 adopts a 57 Rasai stepping motor, so that the rotating angle can be effectively controlled.
The first driving turntable 52 is fixedly connected with a driving shaft end of the driving motor 51. The first driving turntable 52 includes a first driving shaft 521 fixedly connected to a driving shaft end of the driving motor 51 and a first turntable 522 integrally connected to the first driving shaft 521.
The second driving turntable 53 is rotatably disposed on the left positioning seat and is coaxially disposed with the first driving turntable 52. The second driving turntable 53 includes a second driving shaft 531 rotatably connected to the left positioning seat through a bearing, and a second turntable 532 integrally connected to the second driving shaft 531.
The clamping mechanism 41 is detachably arranged at the top ends of the opposite side walls of the positioning seat 47 through the rotation driving device 5 and is used for clamping and centering the knife-edge-shaped straight ruler 6 left and right.
The clamping mechanism 41 comprises two pneumatic clamping jaws 411, the two pneumatic clamping jaws 411 are respectively and fixedly arranged on the side walls of the first driving turntable 52 and the second driving turntable 53, and are arranged on the same horizontal line, and the working mode is centering clamping. The pneumatic gripper on the right side is connected to the first rotary plate 522 by a first connecting plate 54, and the pneumatic gripper on the left side is connected to the second rotary plate 532 by a second connecting plate 55.
The pneumatic clamping jaw 411 is a common pneumatic finger in the prior art, and includes an air cylinder and two parallel clamping jaws capable of being centered and clamped under the action of the air cylinder, and the parallel clamping jaws are clamping jaw ends. The pneumatic clamping jaw 411 is connected with an air source through an air pipe, an electromagnetic valve is arranged on the air pipe, air supply for the pneumatic clamping jaw 411 is controlled through controlling the electromagnetic valve, and then opening and closing of the clamping jaw end are achieved.
Clamping plates 412 are detachably connected between the clamping jaw ends of two pneumatic clamping jaws 411 arranged corresponding to the same horizontal line respectively and are used for clamping and centering the knife-edge-shaped straight edge 6 left and right.
A certain distance is provided between the bottom end surface of the holding plate 412 and the top end surface of the polished surface flat rule 42, i.e. a detection gap is left between the holding plate 412 and the polished surface flat rule 42, so that light can shine into the space from the detection gap.
The bottom plate 12 is further provided with a leveling plate limiting structure 45 for limiting the side wall of the leveling plate 441 and observing whether the leveling plate 441 is leveled.
The leveling plate limiting structure 45 comprises a leveling plate limiting block 451 which is arranged on the bottom plate 12 and is in contact with the side wall of the leveling plate 441, a U-shaped sliding groove 452 is formed in the leveling plate limiting block 451, a connecting bolt penetrates through the U-shaped sliding groove 452, and the connecting bolt is in threaded connection with the leveling plate 441 and moves up and down along the U-shaped sliding groove 452 in the leveling process. Whether the leveling plate 441 is leveled can be judged by observing whether the positions of the connecting bolts on the leveling plate limiting blocks 451 are on the same straight line.
When the square edge ruler is measured, the standard clearance built by the flat crystal needs to be detected, the standard clearance is used as comparison data, and the detected data is recorded in an upper computer.
The switching power supply, the motion controller, the current collector, the switching value controller and the stepping motor driver are all arranged in the control box.
The data acquisition and control of the invention are realized by a motion controller, and a data acquisition module in the motion controller acquires signals of all paths. The collected signals include limit signals and position signal information. The motion controller receives a control command from the upper computer through communication with the industrial personal computer and uploads the acquired data to the upper computer.
The motion controller is a control center of the whole device, uploads various motion control feedback signals to an upper computer upwards, and controls various mechanical motions of the device downwards, so that the requirements of linear displacement of the laser and the spectrometer and motion of 15-degree deflection required in the process of calibrating the knife edge-shaped ruler are met.
The upper computer comprises an industrial case, a power supply, a mainboard, a display card, a hard disk drive, an optical disk drive, an I/O interface module, a display, a keyboard, a mouse, a printer and the like. Each functional module is connected through a bus to complete respective functions and communication functions.
The design of the straightness calibrating device for the working edge of the knife-edge-shaped ruler needs to perform data processing and calculation on light intensity data collected by a spectrometer, a position signal collector, a standard value of a standard gap and the like, and needs to store data in real time, so that a large enough data storage space needs to be provided for storing the data, and a certain amount of data calculation and processing needs to be performed, and therefore, a desktop computer is selected to be used as an upper computer of the system. Through an interface displayed by a display on the upper computer, the specifications of the edge rulers corresponding to different sizes are selected, automatic verification on the display interface is pressed, automatic operation can be realized, data are automatically collected, data are automatically processed, a report is generated, and a measurement result is obtained.
The process of measuring the knife edge-shaped ruler is as follows.
And S1, leveling the grinding surface flat rule 42.
The levelness of the leveling plate 441 is adjusted by turning the leveling knob 442. In the adjusting process, the leveling plate 441 drives the connecting bolts to move up and down along the U-shaped sliding grooves 452 of the leveling plate limiting blocks 451, and whether the leveling plate 441 is leveled can be judged by observing whether the positions of all the connecting bolts are on the same straight line.
And S2, manually putting the ruler into the knife edge type ruler. When all the attachment bolt positions are observed to be in alignment, the knife-edge ruler 6 is placed on the abrasive surface flat 42 between the two holding plates 412.
And S3, clamping and positioning the knife-edge-shaped ruler.
The distance between the two clamping plates 412 is adjusted through the pneumatic clamping jaws 411, and the knife-edge-shaped straight edge 6 is firmly clamped and centered.
S4, the positions of the laser 33 and the spectrometer 32 are adjusted through the micrometer feeding type XYZ manual displacement platform 31, the position of the laser 33 emitting laser and the light transmission gap of the knife-edge-shaped ruler (namely the gap between the knife-edge-shaped ruler 6 and the grinding surface flat ruler 42) are ensured to be positioned on the same straight line, and the position of the spectrometer 32 receiving the laser and the position of the laser 33 emitting the laser are ensured to be positioned on the same straight line.
S41, adjusting the position of the laser 33 and the spectrometer 32 in the Z direction.
The Z-direction feeding structure of the micrometer feeding type XYZ manual displacement platform 31 is adjusted according to the clamping and positioning position of the knife-edge-shaped ruler 6, the third micrometer 326 is rotated to drive the third screw rod to rotate, the third screw rod is assembled with the fifth platform 323, the sixth platform 324 is assembled with the fifth platform 323 in a sliding mode because the vertical position of the fifth platform 323 is an immovable fixed position, and the vertical position of the sixth platform 324 is in a slidable mode, so that the sixth platform 324 can be driven to slide when the third screw rod rotates, the laser 33 arranged on the sixth platform 324 can be driven to move in the Z direction, and the adjustment is stopped when the laser 33 is adjusted to be on the same straight line with the knife-edge-shaped ruler light-transmitting gap. The position adjustment of the spectrometer 32 in the Z direction is based on the same principle.
S42, adjusting the position of the laser 33 and the spectrometer 32 in the X-direction and the Y-direction.
When the position of the laser 33 in the X direction is adjusted, the first micrometer 314 is rotated to drive the first screw to rotate, so as to drive the second platform 316 to slide, thereby driving the Y-direction feeding structure, the Z-direction feeding structure and the laser 33 below the second platform 316 to move along the X direction. The principle of the position adjustment of the spectrometer 32 in the X direction is the same.
When the position of the laser 33 in the Y direction is adjusted, the second micrometer 319 is rotated to drive the second screw rod to rotate, and further the fourth platform 321 is driven to slide, so as to drive the Z-direction feeding structure below the fourth platform 321 and the laser 33 to move along the Y direction. The principle of the position adjustment of the spectrometer 32 in the Y direction is the same.
When the specification and the model of the knife-edge-shaped ruler 6 are changed, the length and the thickness of the knife-edge-shaped ruler 6 are changed, the positions of the laser 33 and the spectrometer 32 in the X direction and the Y direction need to be adjusted, the specification of the required grinding surface flat ruler 42 is also changed, and therefore the positions of the laser 33 and the spectrometer 32 in the Z direction need to be adjusted.
And S5, driving the light ray measuring device 3 to move and measure the knife-edge-shaped ruler through the moving device 2.
The displacement stepping motor 22 in the electric cylinder is started, the lead screw is driven to rotate through the gear train structure, and then the movable sliding block 23 is driven to slide in the cylinder 21, so that the movable sliding block 23 drives the light measuring device 3 to move along the knife-edge-shaped ruler for measurement, and the movement is stopped until the touch plate 73 touches the first travel switch 71 or the second travel switch 72.
The laser 33 emits blue laser to the gap between the knife-edge-shaped ruler 6 and the grinding surface flat ruler 42, the spectrometer 32 receives the blue laser passing through the gap between the knife-edge-shaped ruler 6 and the grinding surface flat ruler 42, the spectrometer 32 feeds collected laser intensity data back to the motion controller, the motion controller feeds the collected laser intensity data back to the upper computer, and the upper computer calculates the straightness of the knife-edge-shaped ruler according to the requirements of regulations, compares the straightness data with the comparison data and outputs a calculation result.
S6, the knife-edge-shaped ruler 6 is driven to rotate through the rotation driving device 5, and then the light measuring device 3 is driven to move and measure the knife-edge-shaped ruler through the moving device 2.
The first driving turntable 52 is driven to rotate by the driving motor 51, and then the clamping mechanism 41 and the knife-edge-shaped ruler 6 clamped in the clamping mechanism 41 are driven to rotate, and the knife-edge-shaped ruler 6 to be detected swings by 15 degrees by taking the working edge of the knife-edge-shaped ruler as an axis according to the detection regulation. At the same time, the size of the light-transmitting gap between the working edge of the knife-edge-shaped ruler 6 and the working surface of the grinding surface flat ruler 42 is carefully observed.
After the detection is finished, the straight edge is swung in the opposite direction for 15 degrees, the detection is carried out again, and the straightness of the working edge of the knife edge-shaped ruler can be clearly seen through the calculation result output by the upper computer.
Claims (10)
1. The utility model provides a mobile measurement device of examination edge shape ruler work edge straightness accuracy which characterized in that: comprises a machine frame (1), the grinding surface leveling ruler is used for supporting the knife-edge-shaped ruler (6), and a switching power supply is used for supplying electric energy to the whole device, a clamping and centering device (4) used for clamping and centering the knife-edge-shaped ruler (6) and a rotation driving device (5) connected with the clamping and centering device (4) and used for driving the clamping and centering device (4) and the knife-edge-shaped ruler (6) to rotate are arranged on the rack (1), a light measuring device (3) used for achieving movement measurement of the straightness of the working edge of the knife-edge-shaped ruler under the driving of the moving device (2) is arranged at the top end of the rack (1) through the moving device (2), the signal output end of the light measuring device (3) is connected to the input end of a control system used for controlling the whole operation of the device, and the controlled ends of the clamping and centering device (4) and the rotation driving device (5) are respectively connected.
2. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 1 wherein: the control system comprises a motion controller for collecting and controlling data, and the motion controller is connected with an upper computer through an industrial personal computer in an interactive communication manner.
3. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 2, wherein: the moving device (2) comprises an electric cylinder fixedly arranged at the top end of the frame (1) and a moving slide block (23) which is arranged on the moving end of the electric cylinder in a sliding fit mode and partially extends out of the electric cylinder.
4. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 3, wherein: light measuring device (3) including respectively through micrometer feeding type XYZ manual displacement platform (31) synteny setting on removing slider (23) and be located edge of a knife shape ruler (6) both sides and be used for transmitting laser to edge of a knife shape ruler printing opacity clearance laser instrument (33) and be used for receiving from edge of a knife shape ruler printing opacity clearance and see through laser light intensity's spectrum appearance (32), laser instrument (33), spectrum appearance (32) are in same horizontal straight line with edge of a knife shape ruler printing opacity clearance, the controlled end of laser instrument (33) is connected in the output of motion controller, the signal output part of spectrum appearance (32) is connected in the input of motion controller.
5. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 4, wherein: the laser (33) is an adjustable blue laser.
6. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 4, wherein: the micrometer feeding type XYZ manual displacement platform (31) is further provided with a position signal collector for collecting laser intensity data of the light measuring device (3) corresponding to the position of the knife-edge-shaped ruler (6) and the deflection angle of the knife-edge-shaped ruler (6), and the signal output end of the position signal collector is connected to the signal input end of the motion controller.
7. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 3, wherein: and a position limiting device (7) for limiting the moving stroke of the light measuring device (3) is arranged on the outer wall of the electric cylinder, and the signal output end of the position limiting device (7) is connected to the signal input end of the motion controller.
8. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 2, wherein: the clamping and centering device (4) comprises two positioning seats (47) vertically arranged at the bottom end of the rack (1), a grinding surface flat rule (42) is arranged between the two positioning seats (47), and the bottom end of the grinding surface flat rule (42) is limited and arranged on a leveling mechanism (44) for adjusting the flatness of the grinding surface flat rule (42) through a grinding surface flat rule limiting structure (46); the top ends of the opposite side walls of the two positioning seats (47) are detachably provided with clamping mechanisms (41) used for clamping and centering the knife edge-shaped ruler (6) left and right through a rotary driving device (5).
9. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 8, wherein: the rotary driving device (5) comprises a driving motor (51) with a fixed end arranged on the right side positioning seat and a driving shaft end extending out of the right side positioning seat, a first driving turntable (52) fixedly connected with the driving shaft end of the driving motor (51) and a second driving turntable (53) which is rotatably arranged on the left side positioning seat and is coaxial with the first driving turntable (52).
10. A movement measuring device for verification of the straightness of the working edge of a knife-edge straightedge as claimed in claim 9, wherein: fixture (41) including fixed two pneumatic clamping jaw (411) that set up respectively on first drive carousel (52) and second drive carousel (53) lateral wall, can dismantle respectively between the clamping jaw end of two pneumatic clamping jaw (411) that set up with the water flat line and be connected with grip block (412) that are used for controlling centre gripping centering to notch shape ruler (6), have certain interval between the bottom face of grip block (412) and the top terminal surface of abrasive surface flat rule (42).
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| CN202010401083.0A CN111412866A (en) | 2020-05-13 | 2020-05-13 | Mobile measuring device for detecting straightness of working edge of knife edge-shaped ruler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112700123A (en) * | 2020-12-30 | 2021-04-23 | 武汉中和博瑞电气有限公司 | Panoramic visualization power system scheduling safety operation and maintenance management system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112700123A (en) * | 2020-12-30 | 2021-04-23 | 武汉中和博瑞电气有限公司 | Panoramic visualization power system scheduling safety operation and maintenance management system and method |
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