CN109373879A - Spare part outside measurement detection device and detection method - Google Patents

Spare part outside measurement detection device and detection method Download PDF

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Publication number
CN109373879A
CN109373879A CN201811510561.0A CN201811510561A CN109373879A CN 109373879 A CN109373879 A CN 109373879A CN 201811510561 A CN201811510561 A CN 201811510561A CN 109373879 A CN109373879 A CN 109373879A
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CN
China
Prior art keywords
displacement sensor
measured
sensor
displacement
sliding block
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Application number
CN201811510561.0A
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Chinese (zh)
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CN109373879B (en
Inventor
邱达
陈世强
徐建
吕俊
刘嵩
李时东
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Hubei Juxin Industrial Co Ltd
Hubei University for Nationalities
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Hubei Juxin Industrial Co Ltd
Hubei University for Nationalities
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Priority to CN201811510561.0A priority Critical patent/CN109373879B/en
Publication of CN109373879A publication Critical patent/CN109373879A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/24Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/28Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The present invention relates to detecting instrument field, a kind of spare part outside measurement detection device and detection method, the part rack including placing part to be measured are disclosed;Mechanism for testing, including at least one displacement sensor and at least one range sensor, displacement sensor is used to scan the outer dimension parameter of part to be measured, and range sensor is used to detect displacement sensor and scans through behind one section of part to be measured along the displacement moved perpendicular to part section direction to be measured;It further include the driving mechanism that at least one driving part rack or mechanism for testing move in straight line, plane or three-dimensional sense.The present invention detects the sectional dimension of multiple parts by mechanism for testing, detects compared to traditional artificial vision, is not easily susceptible to the interference of human factor, the stability of detection process is good, and the requirement to testing staff is low.

Description

Spare part outside measurement detection device and detection method
Technical field
The present invention relates to detecting instrument fields, and in particular to a kind of spare part outside measurement detection device and detection method.
Background technique
In parts machining production process, detection spare part outside measurement is to judge whether Dimension Measurement to be measured is qualified Necessary means.As reinforcing bar, steel pipe, the isometric class of screw rod or disk-like accessory often need threading for the demand of assembling.It passes The external thread parameter detection of system needs to detect several points when being all the manual detection detection for carrying out contact using detection instrument, this Kind mode has many drawbacks in the part external screw thread to be measured detection of batch.Such as: 1) detect heavy workload, low efficiency, detection As a result vulnerable to interference from human factor;2) detection instrument is easy to wear, more demanding etc. to testing staff;3) artificial vision detects skill Art stability is not high, and use process will receive certain limitation;4) externally threaded tooth root shape can not be detected.
Summary of the invention
It is an object of the present invention to provide a kind of spare part outside measurement detection devices, to solve artificial vision's detection zero Part, testing result is vulnerable to interference from human factor, the not high problem of detection technique stability.
In order to achieve the above objectives, the present invention adopts the following technical scheme: spare part outside measurement detection device, including part are put Frame is set, for placing part to be measured;
Mechanism for testing, including at least one displacement sensor and at least one range sensor;Displacement sensor is used for Scan the outer dimension parameter of part to be measured;Range sensor scans through one section of part to be measured for detecting displacement sensor Afterwards along the displacement moved perpendicular to part section direction to be measured;
It further include at least one driving mechanism, driving mechanism drives part rack or mechanism for testing in straight line, plane Or movement in three-dimensional sense.
In above-mentioned technical proposal, displacement sensor first scans the outer dimension parameter in a section of part to be measured, driving Mechanism drives part rack or mechanism for testing edge to move a distance, displacement sensor perpendicular to part section direction to be measured Scan the outer dimension parameter in this section of part to be measured;It so repeats, until having detected the section of all parts to be measured.We Case is detected compared to traditional artificial vision, is not easily susceptible to the interference of human factor, the stability of detection process is good, and to detection The requirement of personnel is low.
Further, driving mechanism includes driving the first driving mechanism of part rack longitudinal movement, and driving part is placed Second driving mechanism of frame vertical motion drives the third driving mechanism of mechanism for testing transverse movement.So that part to be measured Lateral is placed on part rack, and the position of part to be measured is adjusted by the first driving mechanism and the second driving mechanism, is made Keep suitable distance with displacement sensor, detect part convenient for displacement sensor;Third driving mechanism keeps mechanism for testing horizontal It to movement, i.e., is moved along the direction perpendicular to part section to be measured, convenient for carrying out multiple spot detection to part to be measured.
Further, displacement sensor include the first displacement sensor and second displacement sensor, the first displacement sensor and Second displacement sensor is located at the opposite direction in part rack two sides;Range sensor include third range sensor and 4th range sensor;Third range sensor is used to detect the first displacement sensor and second displacement sensor vertical direction Distance;4th range sensor is used to detect the lateral displacement of the first displacement sensor.In the opposite side in part rack two sides To a displacement sensor, and the third range sensor equipped with distance between this two displacement sensors of detection is respectively set, thus The formal parameter of indirect detection axis class, disk class, threaded male component.
Further, the first displacement sensor and second displacement sensor are located at the upper and lower two sides of part rack, survey Test-run a machine structure further includes the 4th driving mechanism for making the first displacement sensor or second displacement sensor vertical motion, and the first displacement passes The lengthwise position of both sensor and second displacement sensor and lateral position are relatively constant.4th driving mechanism makes one of position Displacement sensor vertical motion, convenient for adjusting the distance between two displacement sensors;When detecting the part of different-diameter, can protect Displacement sensor is demonstrate,proved in suitable range, keeps testing result more acurrate.
Further, the 4th driving mechanism drives the first displacement sensor vertical motion, the first displacement sensor and second Displacement sensor is laser displacement sensor;Third range sensor is magnetic railings ruler, and the read head of the magnetic railings ruler is with the first displacement sensing Device movement;4th range sensor is the grating scale being laterally arranged, and the scale grating of the grating scale is fixed, the grating scale Read head is moved with the first displacement sensor.
Laser displacement sensor straightness is good, and detection accuracy is high;Magnetic railings ruler is small in size, and the influence to space structure is small; Grating scale detection range is big, and detection accuracy is high, fast response time, is suitble to the distance of the first displacement sensor transverse shifting of detection.
Further, the first driving mechanism includes the first guide rail, the first sliding block and keeps the first sliding block longitudinal on the first guide rail First drive module of sliding;Second driving mechanism includes the second sliding block, the second guide rail being fixedly connected with the first sliding block and makes The second drive module that second sliding block slides vertically on the second guide rail, second sliding block are fixedly connected with part rack.It is logical The mode for crossing guide rail and sliding block makes the longitudinal direction of part to be measured and vertically movable path walk by the path of guide rail.
Further, third driving mechanism includes third motor and the third guide rail being laterally arranged, the output shaft of third motor It is coaxially connected with third screw rod;Mechanism for testing further includes sliding laterally the third sliding block being connected on third guide rail, third screw rod It is threadedly coupled with the third sliding block;4th driving mechanism includes Four-slider and makes Four-slider vertical motion on third sliding block The 4th drive module;First displacement sensor and third range sensor are connect with the Four-slider;Second displacement sensor It is fixedly connected with third sliding block;Third range sensor is arranged on third sliding block;4th drive module includes being connected to the Two vertical guide posts on three sliding blocks, two guide posts are threaded through on Four-slider, are rotatably connected on third sliding block perpendicular To the 4th screw rod, the 4th screw rod is threadedly coupled with Four-slider, is connected with the 4th knob on the 4th screw rod.
Make mechanism for testing transverse movement on third guide rail by way of third motor, third screw rod, structure is simple, peace It is complete reliable.First displacement sensor and third range sensor are mounted on Four-slider, with Four-slider vertical motion;And Make Four-slider vertical motion by the 4th screw rod, the 4th knob, to adjust the vertical position of the first displacement sensor;By When batch detection part to be measured, the outer dimension of part is varied less, and the vertical position of the first displacement sensor is without frequent It adjusts, thus is adjusted with the 4th rotary manual, driven without the mode of motor, it is cost-saved.
It further, further include the industrial personal computer with touch screen, industrial personal computer and third motor, the first displacement sensor, second Displacement sensor, third range sensor and the electrical connection of the 4th range sensor.Sensor is detected by industrial personal computer as a result, Data calculate then display on the touchscreen, convenient for quickly obtaining the parameter of spare part outside measurement.
It is another object of the present invention to provide a kind of spare part outside measurement detection method, which includes as follows Step;
A builds the detection device of any one of claims 1 to 5, and by the sensor and industry control electrical-mechanical in the device Connection;
Prepare before B detection, part to be measured be placed on part rack, regulate part to be measured, displacement sensor and The position of range sensor;
The cross-sectional shape size of part to be measured when C displacement sensor reads initial position;
D driving mechanism driving mechanism for testing or part rack are moved along the direction perpendicular to part section to be measured, often Secondary moving distance is Δ x;
E reads the Δ x data that range sensor measures;The distance, delta x position that displacement sensor measures is read simultaneously When part to be measured cross-sectional shape size;
F repeats above-mentioned D to E step, until having read the entire outer dimension of part to be measured;
The data that G measures the displacement sensor read and range sensor carry out the disposal of gentle filter;
H finds out the parameter of part to be measured;
Touch screen on I industrial personal computer shows the outer dimension parameter of part to be measured.
Further, object detected is the external screw thread on part to be measured;
Or the detection device of claim 5 is built in step A;
Or in step C, read the data Y0 of magnetic railings ruler, read the first displacement sensor and second displacement sensor just Beginning data;
Or in step E, when a distance, delta x position, the part upper surface to be measured that the first displacement sensor measures is read Thread parameter Y1;Read the part lower surface thread parameter Y2 to be measured that second displacement sensor measures;
Or in step H, industrial personal computer identifies from Y1 tooth root value Y11 and the external screw thread upper surface of external threads upper surface Tooth top value Y12;The tooth root value Y21 of external threads lower surface and the tooth top value Y22 of external screw thread lower surface are identified from Y2;It calculates External screw thread major diameter d=Y0- (Y22+Y12), external screw thread path d1=Y0- (Y21+Y11).
Detailed description of the invention
Fig. 1 is the schematic perspective view of the detection device of embodiment one.
Fig. 2 is the part external screw thread shape data schematic diagram to be measured that screen display is touched in embodiment two.
Fig. 3 is the path schematic diagram of the scanning part cross-section outer dimension to be measured of third displacement sensor in embodiment three.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: rack 1, the first guide rail 11, the first sliding block 12, the first knob 13, Two guide rails 21, the second sliding block 22, the second knob 23, part rack 31, V-block 32, the first displacement sensor 41, second displacement Sensor 42, magnetic railings ruler 43, grating scale 44, third guide rail 5, third motor 51, third sliding block 6, Four-slider 61, guide post 62, the 4th screw rod 63, the 4th knob 64, industrial personal computer 7, third displacement sensor 8.
Embodiment one
The present embodiment spare part outside measurement detection device, including rack 1 as shown in Figure 1: substantially, rack 1 are equipped with part Rack 31 detects the externally threaded mechanism for testing of part to be measured, drives part rack 31 or mechanism for testing in straight line, plane Or the driving mechanism moved in three-dimensional sense.Preferably, which includes driving 31 longitudinal movement of part rack (i.e. Forward and backward movement) the first driving mechanism, the second driving mechanism of driving 31 vertical motion of part rack (i.e. upper and lower movement), And the third driving mechanism of driving mechanism for testing transverse movement (i.e. left and right movement).It is noted that can also make in practice to be measured Part is motionless, makes that mechanism for testing is vertical, longitudinal movement.
First driving mechanism includes the first guide rail 11 being bolted in rack 1, is vertically slided on the first guide rail 11 It is dynamic to be connected with the first sliding block 12, the inside of the first guide rail 11 be equipped with make the first sliding block 12 on the first guide rail 11 longitudinal sliding motion the One drive module, first drive module include the first gear (not shown) being rotatably connected on the first guide rail 11, the It is connected with the first longitudinal rack gear engaged with the first gear on one sliding block 12, is connected in 12 left side first gear of the first sliding block First knob 13;Make 31 longitudinal movement of part rack from there through the first knob 13 of rotation.
Second driving mechanism includes the second guide rail 21 being bolted on the first sliding block 12, is erected on the second guide rail 21 To the second sliding block 22 is slidably connected, the inside of the second guide rail 21, which is equipped with, slides vertically the second sliding block 22 on the second guide rail 21 The second drive module, which includes that the second gear being rotatably connected on the second guide rail 21 (is not shown in figure Out), the second vertical rack gear engaged with second gear is connected on the second sliding block 22, in 22 left side second gear of the second sliding block It is connected with the second knob 23;Make 31 vertical motion of part rack from there through the second knob 23 of rotation.Second sliding block 22 with Part rack 31 is bolted, and the both ends of part rack 31 slide laterally the V-block for being connected with and placing part to be measured 32, the specific slip connection mode of V-block 32 and part rack 31 are as follows: V-block 32 is equipped with and 31 shape of part rack The sliding slot of cooperation.
It should be noted that being only the first drive module/second drive module one using the kind of drive of rack-and-pinion Worm and gear, crank block, screw pair etc. can also be used in kind implementation, the first drive module and/or the second drive module will Rotation becomes other mechanisms of linear motion.Certainly by the way of guide rail, sliding block and the first drive module/second drive module A kind of implementation of only the first driving mechanism/second driving mechanism, the first driving mechanism and/or the second driving mechanism may be used also Keep part rack 31 perpendicular using modes such as the transmissions such as hydraulic power unit, Pneumatic pressure power unit, Electrohydraulic push rod, motor lead screw set To and longitudinal movement, can be selected according to the actual situation, specifically with no restrictions.
Third driving mechanism includes third motor 51 and the third guide rail 5 being laterally arranged, and third motor 51 is stepper motor And it is located at the inside of third guide rail 5, the output shaft of third motor 51 is coaxially connected with third screw rod ((not shown).Test Mechanism includes displacement sensor and range sensor, and displacement sensor includes that the first displacement sensor 41 and second displacement sense Device 42;Range sensor includes third range sensor and the 4th range sensor.Mechanism for testing further includes sliding laterally connection Vertical third sliding block 6 on third guide rail 5, third screw rod are threadedly coupled with third sliding block 6.
Second displacement sensor 42 is bolted in the lower end of third sliding block 6, the first displacement sensor 41 and second Displacement sensor 42 is laser displacement sensor, preferably the high precision laser displacement sensor of Wuxi Hong Chuan Science and Technology Ltd. LDS series.Third range sensor is magnetic railings ruler 43, perpendicular for detecting the first displacement sensor 41 and second displacement sensor 42 To the difference in height in direction, the length of 43 read head of magnetic railings ruler is about 7cm, and 43 step pitch of magnetic railings ruler is 5um;It is preferred that the bright science and technology of Shenzhen's rice The MIRAN series of Co., Ltd.Mechanism for testing further includes the 4th range sensor, and the 4th range sensor is the light being laterally arranged Grid ruler 44, the scale grating of the grating scale 44 are fixed on third guide rail 5, and the read head of the grating scale 44 is with the first displacement sensor 41 move together, and the pitch of the grating scale 44 is 10um, preferably the MSA 7xx series of the accurate boda Science and Technology Ltd. in Beijing Closed grating scale;The grating scale 44 is used to read the lateral displacement of the first displacement sensor 41 and second displacement sensor 42.
The preferred third sliding block 6 of the present embodiment is vertically arranged, so that the first displacement sensor 41 and second displacement sensor 42 Positioned at the upper and lower two sides of part rack 31;Third sliding block 6 can be arranged with vertical direction in any angle in practice, accordingly First displacement sensor 41 and second displacement sensor 42 direction that be located at 31 two sides of part rack opposite.It should refer to Out, in practice in order to further increase the accuracy of detection data, can in the externally threaded circumferential direction of part to be measured more settings it is several Displacement sensor, and much more corresponding setting detection displacement sensor spacing from range sensor.
Mechanism for testing further includes the 4th driving mechanism for making 42 vertical motion of second displacement sensor, the 4th driving mechanism packet It includes Four-slider 61 and makes the 4th drive module of the vertical motion on third sliding block 6 of Four-slider 61, the first displacement sensor 41 and third range sensor connect with Four-slider 61 by bolt so that the read head of magnetic railings ruler 43 follows the first displacement sensing Device 41 is mobile.4th drive module includes two vertical guide posts 62 being connected on third sliding block 6, guide post 62 and third The connection type of sliding block 6 can be rotation or affixed;Two guide posts 62 are threaded through on Four-slider 61, on third sliding block 6 It is rotatably connected to the 4th vertical screw rod 63, the 4th screw rod 63 is threadedly coupled with Four-slider 61, and the upper end of the 4th screw rod 63 is solid It is connected to the 4th knob 64;From there through the 4th knob 64 of rotation, Four-slider 61 is made to drive the first displacement sensor 41 and magnetic grid The read head vertical motion of ruler 43.
When part to be measured due to batch detection, the outer dimension of part to be measured is varied less, the lengthwise position of part to be measured With vertical position without often adjusting;And first displacement sensor 41 vertical position without often adjusting, thus with first Knob 13, the second knob 23 and the 4th knob 64 manually adjust, and drive without the mode of motor, cost-saved. Third motor 51, the first displacement sensor 41, second displacement sensor 42, magnetic railings ruler 43 and grating scale 44 in the present embodiment is equal It is electrically connected with industrial personal computer 7.
Embodiment two
Spare part outside measurement detection method, the present embodiment are detected outside part to be measured using the detection device in embodiment one The method of the outer dimension of screw thread, this method comprises the following steps:
A builds the detection device in embodiment one.
Prepare before B detection, part to be measured is placed on the V-block 32 on part rack 31, while can be according to be measured The length of part adjusts the distance between two pieces of V-blocks 32 on part rack 31;The first knob 13 is rotated, keeps part to be measured vertical To movement, the first displacement sensor 41 and second displacement sensor 42 is enable to issue the extended line of laser by being tested to be measured zero The externally threaded central axis of part, and it is perpendicular with it.
C reads initial position data, reads the detection data of magnetic railings ruler 43, is recorded as Y0, reads the first displacement sensor 41 and second displacement sensor 42 detection data, and data are uploaded to industrial personal computer 7;
D rotates third motor 51, and third motor 51 makes sliding block transverse movement, i.e., transports along the length direction of part to be measured Dynamic, the read head of the first displacement sensor 41, second displacement sensor 42 and grating scale 44 moves therewith, and each moving distance is Δ x;
E reads the Δ x data that grating scale 44 measures;Table on the part to be measured that the first displacement sensor 41 measures is read simultaneously Face thread parameter, is recorded as Y1;The part lower surface to be measured thread parameter that second displacement sensor 42 measures is read, is recorded as Y2。
F repeats above-mentioned D to E step, until having read whole section of external screw thread on part to be measured.
The data that G measures the displacement sensor read and range sensor carry out the disposal of gentle filter.
H finds out the parameter of part to be measured.
Touch screen on I industrial personal computer 7 shows the outer dimension parameter of part to be measured.
When detecting part external thread parameter to be measured using the above method, every acquisition 41 He of the first displacement sensor of industrial personal computer 7 When the data Y1 and Y2 measured in the Y direction that second displacement sensor 42 is sent, grating scale 44 will send an X-axis The data detected on direction, and the data differ a fixed displacement x with a upper data in the X-axis direction.Such as This repeat step D and E, measure multiple groups X-axis, the data of Y-axis, then available multiple groups 2-D data set, then synthesize to Survey the schematic diagram data of part external screw thread axial direction section view.As shown in Fig. 2, for part external screw thread to be measured upper surface tooth form data and Part external screw thread schematic diagram data to be measured after the tooth form Data Synthesis of lower surface.
The data in Fig. 2 are reasonably judged again, filtered, are segmented, find the straight length portion of each flank of tooth, further The intersection point of straight length portion is found out, and calculates several basic parameters, finally carries out error compensation, detection data is stored in data Library, a complete detection cycle terminate.The external thread parameter that part to be measured can be calculated by the data in Fig. 2 is as follows:
Major diameter d=Y0- (Y22+Y12), path d1=Y0- (Y21+Y11), pitch P.
In formula: Y11 is the external screw thread upper surface that industrial personal computer is identified from the Y1 that the first displacement sensor measures after filtering Tooth root value;
Y12 is the tooth top for the external screw thread upper surface that industrial personal computer is identified from the Y1 that the first displacement sensor measures after filtering Value;
Y21 is the tooth root for the external screw thread lower surface that industrial personal computer is identified from the Y2 that second displacement sensor measures after filtering Value;
Y22 is the tooth top for the external screw thread lower surface that industrial personal computer is identified from the Y2 that second displacement sensor measures after filtering Value;
The distance between adjacent two screw thread of pitch P.
Further according to common knowledge, externally threaded central diameter d2=d-0.640327P can be calculated, can be led to by major diameter and screw pitch It crosses and is simply calculated.
Since Y11, Y12, Y21 and Y22 that each section measures are not quite similar, when not high to required precision, can by Y11, Y12, Y21 and Y22 calculate externally threaded parameter after averaging again;If to detection accuracy require it is higher, can by Y11, The maxima and minima of Y12, Y21 and Y22 substitute into external screw thread major diameter and the calculation formula of path is calculated, and obtain external threads The value range of major diameter and path, to judge the externally threaded machining accuracy.
Embodiment three
The detection device of the present embodiment and embodiment one the difference is that, displacement sensor and distance in mechanism for testing The quantity and position of sensor are different from embodiment one.As shown in figure 3, displacement sensor includes third in the present embodiment Displacement sensor 8 is laser displacement sensor, which can be around the periphery of part to be measured by the half of setting Diameter and speed rotation, so that a cross-sectional shape size of part to be measured is scanned;It also is provided with embodiment one kind simultaneously Third driving mechanism, third displacement sensor 8 can also be along perpendicular to part section to be measured under the driving of third driving mechanism Direction movement.
Range sensor is only provided with the grating scale 44 in embodiment one, and the read head of the grating scale 44 is with third displacement sensing Device 8 is moved along perpendicular to part section direction to be measured, is measured third displacement sensor 8 and is transported along perpendicular to part section direction to be measured Dynamic displacement.The driving method that motor and eccentric shaft can be used in the present embodiment makes third displacement sensor 8 around part to be measured Periphery rotation;This structure is the prior art, and details are not described herein.
When detecting the outer dimension of part to be measured with the detection device of the present embodiment, 8 initial position of third displacement sensor Positioned at the surface of part to be measured, rotate third displacement sensor 8 according to the radius and speed of setting, i.e., by Fig. 3 Path S movement.Since path and the speed of third displacement sensor 8 are it is known that thus can be according to the movement of third displacement sensor 8 Time determines the position of third displacement sensor 8.It is measured in 8 motion process of third displacement sensor to piece surface to be measured Distance can scan the outer dimension in a section of part to be measured after the rotation of third displacement sensor 8 is turned around to come.
After the size detection for completing a section, third displacement sensor 8 is located at the surface of part to be measured again, and then the Three driving mechanisms make the read head of third displacement sensor 8 and grating scale 44 edge move Δ x, light perpendicular to part section to be measured direction Grid ruler 44 reads this displacement data and sends industrial personal computer 7 to.Then third displacement sensor 8 turns around according still further to path S rotation, will The outer dimension in the section of first Δ x position of part to be measured, which scans, to be come.It so repeats the above steps, scans part to be measured N cross-sectional shape size obtains the data acquisition system of n group cross-sectional shape size, then synthesizes the entire three-dimensional profile of part to be measured Size.
Certainly, in order to improve detection speed, the quantity of third displacement sensor 8 can be it is multiple, such as four, four thirds Displacement sensor 8 is evenly distributed on the S of path.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art, Without departing from the inventive concept of the premise, several modifications and improvements can also be made, these also should be considered as guarantor of the invention Range is protected, these all will not influence the effect and patent practicability that the present invention is implemented.The present invention omits the technology of description, shape Shape, construction portion are well-known technique.

Claims (10)

1. spare part outside measurement detection device, it is characterised in that: including
Part rack, for placing part to be measured;
Mechanism for testing, including at least one displacement sensor and at least one range sensor;Institute's displacement sensors are used for Scan the outer dimension parameter of part to be measured;Range sensor scans through one section of part to be measured for detecting displacement sensor Afterwards along the displacement moved perpendicular to part section direction to be measured;
Further include at least one driving mechanism, the driving mechanism drive the part rack or mechanism for testing straight line, Movement in plane or three-dimensional sense.
2. spare part outside measurement detection device according to claim 1, it is characterised in that: the driving mechanism includes driving First driving mechanism of the part rack longitudinal movement drives the second driving machine of the part rack vertical motion Structure drives the third driving mechanism of the mechanism for testing transverse movement.
3. spare part outside measurement detection device according to claim 1 or 2, it is characterised in that: institute's displacement sensors packet The first displacement sensor and second displacement sensor are included, the first displacement sensor and second displacement sensor are located at part and put Set the opposite direction in frame two sides;The range sensor includes third range sensor and the 4th range sensor;Third distance Sensor is used to detect the distance of the first displacement sensor and second displacement sensor vertical direction;4th range sensor is used for Detect the lateral displacement of the first displacement sensor.
4. spare part outside measurement detection device according to claim 3, it is characterised in that: first displacement sensor and Second displacement sensor is located at the upper and lower two sides of part rack, and the mechanism for testing further includes making the first displacement sensing Both 4th driving mechanism of device or second displacement sensor vertical motion, the first displacement sensor and second displacement sensor Lengthwise position and lateral position are relatively constant.
5. spare part outside measurement detection device according to claim 4, it is characterised in that: the 4th driving mechanism driving The first displacement sensor vertical motion, first displacement sensor and second displacement sensor are laser displacement sensing Device;The third range sensor is magnetic railings ruler, and the read head of the magnetic railings ruler is moved with the first displacement sensor;4th distance Sensor is the grating scale being laterally arranged, and the scale grating of the grating scale is fixed, and the read head of the grating scale is with described first Displacement sensor moves together.
6. the spare part outside measurement detection device according to any one of claim 2~5, it is characterised in that: described One driving mechanism includes the first guide rail, the first sliding block and the first driving mould for making the longitudinal sliding motion on the first guide rail of the first sliding block Block;Second driving mechanism includes the second sliding block, the second guide rail being fixedly connected with first sliding block and makes the second sliding block The second drive module slid vertically on the second guide rail, second sliding block are fixedly connected with the part rack.
7. the spare part outside measurement detection device according to any one of claim 2~5, it is characterised in that: described Three driving mechanisms include third motor and the third guide rail being laterally arranged, and the output shaft of third motor is coaxially connected with third silk Bar;The mechanism for testing further includes sliding laterally the third sliding block being connected on the third guide rail, third screw rod and the third Sliding block is threadedly coupled;4th driving mechanism include Four-slider and make Four-slider on third sliding block vertical motion the Four drive modules;First displacement sensor and third range sensor are connect with the Four-slider;The second displacement passes Sensor is fixedly connected with third sliding block;The third range sensor is arranged on third sliding block;4th drive module includes Two vertical guide posts being connected on the third sliding block, two guide posts are threaded through on Four-slider, and the third is sliding The 4th vertical screw rod is rotatably connected on block, the 4th screw rod is threadedly coupled with Four-slider, is connected with the 4th on the 4th screw rod Knob.
8. spare part outside measurement detection device according to claim 7, it is characterised in that: further include the industry control with touch screen Machine, industrial personal computer and the third motor, the first displacement sensor, second displacement sensor, third range sensor and the 4th away from It is electrically connected from sensor.
9. spare part outside measurement detection method, it is characterised in that: the detection method includes the following steps;
A builds detection device described in any one of claims 1 to 5, and by the sensor and industry control electrical-mechanical in the device Connection;
Prepare before B detection, part to be measured is placed on part rack, part, displacement sensor and distance to be measured are regulated The position of sensor;
The cross-sectional shape size of part to be measured when C displacement sensor reads initial position;
D driving mechanism driving mechanism for testing or part rack are moved along the direction perpendicular to part section to be measured, are moved every time Dynamic distance is Δ x;
E reads the Δ x data that range sensor measures;It is waited for when reading the distance, delta x position that displacement sensor measures simultaneously Survey the cross-sectional shape size of part;
F repeats above-mentioned D to E step, until having read the entire outer dimension of part to be measured;
The data that G measures the displacement sensor read and range sensor carry out the disposal of gentle filter;
H finds out the parameter of part to be measured;
Touch screen on I industrial personal computer shows the outer dimension parameter of part to be measured.
10. spare part outside measurement detection method according to claim 9, it is characterised in that:
Object detected is the external screw thread on part to be measured;
Or the detection device of claim 5 is built in the step A;
Or in the step C, read the data Y0 of magnetic railings ruler, read the first displacement sensor and second displacement sensor just Beginning data;
Or in the step E, when a distance, delta x position, the part upper surface to be measured that the first displacement sensor measures is read Thread parameter Y1;Read the part lower surface thread parameter Y2 to be measured that second displacement sensor measures;
Or in the step H, industrial personal computer identifies tooth root value Y11 and the external screw thread upper surface of external threads upper surface from Y1 Tooth top value Y12;The tooth root value Y21 of external threads lower surface and the tooth top value Y22 of external screw thread lower surface are identified from Y2;It calculates External screw thread major diameter d=Y0- (Y22+Y12), external screw thread path d1=Y0- (Y21+Y11).
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