A kind of precision rotating body diameter of part automatic measuring instrumentTechnical field
The present invention relates to electronic technology fields, and in particular to a kind of precision rotating body diameter of part automatic measuring instrument.
Background technology
At present, when mechanical processing, some irregular revolving body machine components can be measured, used at presentMethod be essentially contact type measurement, largely use or traditional manual measurement, contact type measurement can be easily destroyed zeroPart surface forms scratch, influences the quality of part；Meanwhile using manually measuring, efficiency is low, and measurement accuracy is limited, due toIt is big to measure difficulty for the scrambling of part.
Current non-contact measurement, it is most of using pattern displacement measuring method, use this method, though precision compared withHeight, but it is of high cost, and use environment requirement is high.
Invention content
It is an object of the invention to：A kind of precision rotating body diameter of part automatic measuring instrument is provided, is solved using contactFormula measures difficulty when measuring the diameter of irregular rotary part big and high using the requirement of pattern displacement mensuration use environmentThe technical issues of.
The technical solution adopted by the present invention is as follows：
A kind of precision rotating body diameter of part automatic measuring instrument, including rack, be provided in the rack elevating mechanism andIts driving device is fixedly installed optoelectronic switch and laser scanning caliper, institute below the elevating mechanism in same levelThe clamping device for being additionally provided in rack and placing part to be measured vertically, the optoelectronic switch and laser scanning caliper are stated perpendicularThe upward moving range of Nogata is more than the height placed vertically of part, and the driving device, optoelectronic switch and laser scanning are surveyedDiameter instrument is all connected with control device.
Further, the elevating mechanism includes standing screw, and the standing screw epimere is equipped with fixing nut,The standing screw hypomere is equipped with traveling nut, and the traveling nut is fixedly connected with a slide block, and is set in the rackThere is guide rail, the sliding block slides on the guide rail, and optoelectronic switch and laser scanning caliper are fixedly connected on the sliding block.
Further, the driving device of the elevating mechanism is stepper motor.
Further, the laser scanning caliper includes Laser emission end and laser pick-off end, the Laser emission endIt is oppositely arranged with laser pick-off end, the part to be measured is arranged between Laser emission end and laser pick-off end.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. the measuring instrument uses contactless measurement, any damage is not generated to piece surface, by controlling steppingMotor can control instrument to carry out automatic measurement, reduce the trouble that manual measurement is brought.
2. the mode that the elevating mechanism is driven using differential screw, screw rod respectively with traveling nut and fixing nut groupInto two screw pairs, fixing nut is immovable, and traveling nut cannot rotate and can only do lifting fortune on guide rail with movable sliderDynamic, screw rod often rotates 1 circle, difference of the practical displacement distance of traveling nut for two sections of lead of screw thread, when screw pitch selection is appropriate and screw pitchWhen difference is smaller, the minute movement on vertical direction is can be realized as by traveling nut, realizes that difficulty is small, positioning accuracy is high.
3. using laser scanning caliper, do not need to abide by abbe's principle, it is convenient to measure.
4. control device control stepper motor drives elevating mechanism to move downward, make optoelectronic switch downward in the vertical directionMobile, when optoelectronic switch light beam is just moved to workpiece top, light beam is blocked, and signal is transmitted to control dress by optoelectronic switchIt puts, control device continues to move down according to measurement demand (such as measuring from the diameter at the 3mm of end face), control stepper motor,It reaches and stops movement, and laser scanning caliper is controlled to measure after measuring position；High certainty of measurement.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the overall structure figure of the present invention；
Reference numeral：1- racks, 2- stepper motors, 3- screw rods, 4- fixing nuts, 5- traveling nuts, 6- guide rails, 7- are slidedBlock, 8- Laser emissions end, 9- laser pick-ofves end, 10- optoelectronic switches, 11- linking arms, 12- parts to be measured, 13- clamping devices.
Specific embodiment
All features or disclosed all methods disclosed in this specification or in the process the step of, in addition to mutually exclusiveFeature and/or step other than, can combine in any way.
It elaborates with reference to Fig. 1, Fig. 2 to the present invention.
Including rack 1, elevating mechanism is provided in the rack 1 for a kind of precision rotating body diameter of part automatic measuring instrumentAnd its driving device, optoelectronic switch 10 is fixedly installed in same level below the elevating mechanism and laser scanning is calibratedInstrument is additionally provided with the clamping device 13 for placing part 12 to be measured vertically in the rack 1, and the optoelectronic switch 10 and laser are sweptRetouch the height placed vertically that the moving range of caliper in the vertical direction is more than part, the driving device, optoelectronic switch10 and laser scanning caliper be all connected with control device.
The elevating mechanism includes standing screw 3, and 3 epimere of standing screw is equipped with fixing nut 4, described solidDetermine 3 hypomere of screw rod and be equipped with traveling nut 5, the traveling nut 5 is fixedly connected with sliding block 7, is provided in the rack 1Guide rail 6, the sliding block 7 slide on the guide rail 6, are fixedly connected with optoelectronic switch 10 on the sliding block 7 and laser scanning is calibratedInstrument.
The driving device of the elevating mechanism is stepper motor 2.
The laser scanning caliper includes Laser emission end 8 and laser pick-off end 9, the Laser emission end 8 and laserReceiving terminal 9 is oppositely arranged, and the part 12 to be measured is arranged between Laser emission end 8 and laser pick-off end 9.
Specific embodiment 1
A kind of precision rotating body diameter of part automatic measuring instrument, including rack 1, rack 1 include horizontal positioned engine base andOn the support structure, driving mechanism uses stepper motor 2 for the support construction placed vertically, elevating mechanism and its driving device settingDriving；Below the elevating mechanism optoelectronic switch 10 and laser scanning caliper, the machine are fixedly installed in same levelThe clamping device for placing part 12 to be measured vertically, the optoelectronic switch 10 and laser scanning caliper are additionally provided on seat perpendicularThe upward moving range of Nogata is more than the height placed vertically of part, the driving device, optoelectronic switch 10 and laser scanningCaliper is all connected with control device.
The most important two parts of the instrument --- positioning and measurement, positioning mainly use lifting gear (differential screw transmission)Coordinate with optoelectronic switch 10, screw rod 3 is driven to rotate by stepper motor 2, screw rod 3 drives movable nut to move, so as to movable slider 7It is moved on guide rail 6, optoelectronic switch 10 and laser scanning caliper is made to reach the position specified, to complete to position；It measures and usesBe laser scanning caliper, this method is non-cpntact measurement, and measurement accuracy is very high.Whole instrument size for 300mm ×260mm × 340mm belongs to small-sized measuring instrument.Part 12 to be measured is vertical display, so the entire moving component of instrumentThe direction of motion is also vertical.
Specific embodiment 2
The elevating mechanism includes standing screw 3, and 3 epimere of standing screw is equipped with fixing nut 4, fixed spiral shellMother 4 is fixed in rack 1, and 3 hypomere of standing screw is equipped with traveling nut 5, the traveling nut 5 and sliding block7 are fixedly connected, and guide rail 6 is provided in the rack 1, and the sliding block 7 slides on the guide rail 6, fixed on the sliding block 7 to connectConnect optoelectronic switch 10 and laser scanning caliper；The laser scanning caliper includes Laser emission end 8 and laser pick-off end 9,The Laser emission end 8 and laser pick-off end 9 are oppositely arranged by linking arm 11, and the part 12 to be measured is arranged on Laser emissionBetween end 8 and laser pick-off end 9.
Specific embodiment 3
Since the section of tested part is circle, clamping device uses circular grain-clamping table, part 12 to be measured is putEnter grain-clamping table, adjusting nut is provided on grain-clamping table, for part 12 to be measured to be fixed.
The present invention operation principle be：
According to the length of workpiece, part will be measured and move to corresponding height (this need to highly be more than Workpiece length)；It clampsAfter workpiece, control device control stepper motor makes optoelectronic switch be moved down in vertical direction, when optoelectronic switch light beam just movesWhen moving tested part top, light beam is blocked, and optoelectronic switch sends the signal to control device, and control device is according to measurement needIt asks (such as measuring from the diameter at the 3mm of end face), control stepper motor continues to move down, and reaches and stops moving after measuring positionIt is dynamic, since the light beam that laser scanning caliper and optoelectronic switch are sent out is needed in same level, so the level stopped nowFace is the working face of laser scanning caliper, so as to measure the size of the diameter on fixed position.