CN115523864A

CN115523864A - Axle part size measurement device based on DIC

Info

Publication number: CN115523864A
Application number: CN202211285603.1A
Authority: CN
Inventors: 李桂华; 王晓宇; 孙卫庆; 李涛; 龚启诚
Original assignee: Anhui University
Current assignee: Anhui University
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2022-12-27

Abstract

The invention relates to the technical field of shaft part measurement, in particular to a shaft part size measuring device based on DIC (digital computer), which comprises a servo motor, wherein a motor base is installed at the bottom of the servo motor, a positioning laser generator is installed at the top of the servo motor, a three-jaw chuck is installed at the output end of the servo motor, an operating rod is arranged at the top of the three-jaw chuck, a background plate is arranged on one side of the servo motor, a support frame is arranged at the rear part of the background plate, and a positioning column is installed on one side of the support frame. According to the invention, the positioning laser generator is started, the position between the servo motor and the movable screw rod seat is adjusted, and the positioning laser emitted by the laser generator is aligned to the positioning middle line on the side surface of the probe thrust rod, so that the middle line of the servo motor can be coincided with the middle point of the probe head, the shaft part needing to be tested can be aligned to the probe head, and the accuracy of the measurement result is further ensured.

Description

Axle part size measurement device based on DIC

Technical Field

The invention relates to the technical field of shaft part measurement, in particular to a shaft part size measuring device based on DIC.

Background

Shaft parts often appear in various mechanical parts, but when measuring the surface roundness of a circular shaft part, a measurement technology based on DIC is required.

Through retrieval, in a DIC-based shaft part size measuring device disclosed as CN110986827A, the invention discloses a DIC-based shaft part size measuring device which comprises a DIC-based shaft part size measuring device body and a motor fixing seat, wherein the motor is installed on the motor fixing seat, an output shaft of the motor is connected with a screw rod, the outer side of the screw rod is connected with a sliding sleeve in a sleeved mode through a screw, the upper end of the sliding sleeve is provided with a through hole, a probe is installed in the through hole, one side, located in the sliding sleeve, of the outer wall of the probe is provided with a thrust ring, a spring is sleeved between the thrust ring and the bottom surface of the sliding sleeve on the outer side of the probe, and speckle mark points are sprayed and printed on the surface, exposed to the outer side of the sliding sleeve, of the probe; a binocular camera for shooting probe motion image is installed on the support. According to the invention, the DIC binocular detection system is used for acquiring speckles on the surface of the probe to calculate the overall dimension of the workpiece, so that the high measurement precision can be ensured, and the detection is convenient and rapid.

However, in the conventional DIC-based shaft part dimension measuring apparatus, the workpiece is measured by using the workpiece clamping apparatus and the workpiece separation method, and therefore, for the alignment of the probe and the workpiece and the disadvantage thereof, if the probe cannot be accurately positioned right above the shaft part, the measured result may be deviated, and therefore, the DIC-based shaft part dimension measuring apparatus is provided.

Disclosure of Invention

The present invention is directed to a DIC-based shaft part dimension measuring apparatus, so as to solve the problems mentioned in the background art.

In order to solve the technical problem, the invention adopts the following technical scheme: a DIC-based shaft part sizing apparatus comprising:

servo motor, the motor base is installed to servo motor's bottom, location laser generator is installed at servo motor's top, three-jaw chuck is installed to servo motor's output, three-jaw chuck's top is provided with the action bars, one side of servo motor is provided with the background board, the rear portion of background board is provided with the support frame, the reference column is installed to one side of support frame, the removal lead screw seat is installed to the top of background board, the inside of removing the lead screw seat is provided with ball, driving motor is installed to ball's input, ball's outside cover is equipped with lead screw nut seat, one side of lead screw nut seat is provided with the accepting box, the internally mounted of accepting box has thrust spring, thrust spring's the other end is connected with probe thrust rod, probe thrust rod's the stable piece that is provided with all around, spacing way has been seted up in the outside of cross stable piece, the both sides of spacing way are provided with the ball, probe thrust rod's the other end is provided with the head, the surface of cross stable piece is provided with the location central line, probe thrust rod's another side is provided with the speckle, servo motor's opposite side is provided with the camera support, the regulation is installed to the inside of camera support.

Preferably, the movable screw seat further comprises:

the slider, it is installed remove the both sides of lead screw seat, the outside of slider is provided with the spacing groove, the other end in spacing groove is connected with stabilizing base, stabilizing base's side has seted up the locating hole, actuating cylinder is installed to the bottom of removing the lead screw seat.

Preferably, the stabilizing base is fixedly connected with the limiting groove, and the sliding block is matched with the limiting groove in size.

Preferably, the movable lead screw seat is fixedly connected with the stabilizing base through the adjusting cylinder, and the movable lead screw seat is movably connected with the limiting groove.

Preferably, the probe thrust rod is elastically connected with the accommodating box through a thrust spring, and the probe thrust rod is fixedly connected with the probe head.

Preferably, the containing box is fixedly connected with the lead screw nut seat, and the probe thrust rod is movably connected with the containing box.

Preferably, the positioning laser generator is fixedly connected with the servo motor, and the center line of the positioning laser generator is parallel to the central axis of the output end of the servo motor in the vertical direction.

Preferably, the positioning hole is matched with the positioning column in size, and the positioning column is fixedly connected with the support frame.

Preferably, the cross-shaped stabilizing block is fixedly connected with the probe thrust rod, and the size of the cross-shaped stabilizing block is matched with that of the limiting channel.

Preferably, the slider is symmetrical about the axis that removes the lead screw seat, and slider and spacing groove all are provided with two.

The above description shows that, with the above technical solutions of the present application, the technical problems to be solved by the present application can be solved.

Meanwhile, through the technical scheme, the invention at least has the following beneficial effects:

according to the invention, the positioning laser generator can be started firstly, then the position between the servo motor and the movable screw seat is adjusted, and the positioning laser emitted by the laser generator is aligned to the positioning middle line on the side surface of the probe thrust rod, so that the middle line of the servo motor can be coincided with the middle point of the probe head, the shaft part to be tested can be aligned to the probe head, and the accuracy of the measurement result is further ensured;

according to the invention, the driving motor is started to drive the ball screw to rotate, so that the screw nut seat is driven to move along the ball screw, and the probe head is driven to move on the central axis of the shaft part, so that the roundness of the shaft part at different positions can be measured;

the invention can shoot the motion image of the speckles through the binocular camera, and after the data is transmitted, the surface size of the workpiece is calculated according to the motion track of the speckles, thereby completing the high-precision measurement.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the container of the present invention;

FIG. 3 is a schematic view of a supporting frame of the present invention;

fig. 4 is a schematic structural view of the movable screw seat of the present invention.

FIG. 5 is an enlarged schematic view of the point A in FIG. 1 according to the present invention.

Fig. 6 is a schematic structural diagram of a regulating cylinder of the invention.

In the figure: 1. a drive motor; 2. moving the screw seat; 3. a ball screw; 4. a box is accommodated; 5. a lead screw nut seat; 6. a probe thrust rod; 7. a support frame; 8. a background plate; 9. a probe head; 10. speckle; 11. a three-jaw chuck; 12. a camera bracket; 13. a binocular camera; 14. an operating lever; 15. a servo motor; 16. positioning a laser generator; 17. positioning a midline; 18. a thrust spring; 19. a limiting groove; 20. an adjusting cylinder; 21. a stabilizing base; 22. a slider; 23. an adjusting knob; 24. a motor base; 25. a limiting channel; 26. rolling the beads; 27. a cross stabilizing block; 28. positioning holes; 29. and a positioning column.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Embodiment 1

As shown in fig. 1 to 5, the present invention provides a technical solution: a DIC-based shaft part sizing apparatus comprising: the servo motor 15, the bottom of the servo motor 15 is equipped with the motor base 24, the top of the servo motor 15 is equipped with the positioning laser generator 16, the positioning laser generator 16 is fixedly connected with the servo motor 15, and the center line of the positioning laser generator 16 is parallel to the central axis of the output end of the servo motor 15 in the vertical direction; the three-jaw chuck 11 is installed at the output end of the servo motor 15, the operating rod 14 is arranged at the top of the three-jaw chuck 11, the background plate 8 is arranged on one side of the servo motor 15, the support frame 7 is arranged at the rear part of the background plate 8, the positioning column 29 is installed on one side of the support frame 7, the movable lead screw seat 2 is installed above the background plate 8, the ball screw 3 is arranged inside the movable lead screw seat 2, the driving motor 1 is installed at the input end of the ball screw 3, the lead screw nut seat 5 is sleeved outside the ball screw 3, the containing box 4 is arranged on one side of the lead screw nut seat 5, the thrust spring 18 is installed inside the containing box 4, the probe thrust rod 6 is connected to the other end of the thrust spring 18, the containing box 4 is fixedly connected to the lead screw nut seat 5, the probe thrust rod 6 is movably connected to the containing box 4, the driving motor 1 is started to drive the ball screw 3 to rotate, so as to drive the lead screw nut seat 5 to move along the ball screw 3, and further drive the probe head 9 to move on the central axis of the shaft part, and thus the roundness of the shaft part at different positions can be measured; a cross-shaped stabilizing block 27 is arranged around the probe thrust rod 6, a limiting channel 25 is arranged on the outer side of the cross-shaped stabilizing block 27, the cross-shaped stabilizing block 27 is fixedly connected with the probe thrust rod 6, and the cross-shaped stabilizing block 27 is matched with the limiting channel 25 in size; rolling balls 26 are arranged on two sides of the limit channel 25, a probe head 9 is arranged at the other end of the probe thrust rod 6, the probe thrust rod 6 is elastically connected with the accommodating box 4 through a thrust spring 18, and the probe thrust rod 6 is fixedly connected with the probe head 9; a positioning center line 17 is arranged on the surface of the cross-shaped stabilizing block 27, the positioning laser generator 16 is started firstly, then the position between the servo motor 15 and the movable screw seat 2 is adjusted, and positioning laser emitted by the positioning laser generator 16 is aligned to the positioning center line 17 on the side surface of the probe thrust rod 6, so that the center line of the servo motor 15 can be ensured to be superposed with the middle point of the probe head 9, a shaft part needing to be tested can be aligned to the probe head 9, and the accuracy of a measuring result is ensured; the other side of the probe thrust rod 6 is provided with speckles 10, the other side of the servo motor 15 is provided with a camera bracket 12, one side of the camera bracket 12 is provided with an adjusting button 23, a binocular camera 13 is installed inside the camera bracket 12, the binocular camera 13 shoots moving images of the speckles 10, after data are transmitted, the surface size of a workpiece is calculated according to the movement tracks of the speckles 10, and high-precision measurement is completed.

Example two

As shown in fig. 2 to 6, as a preferred embodiment, on the basis of the above manner, further, two sliding blocks 22 are installed on two sides of the movable screw seat 2, a limiting groove 19 is provided on an outer side of the sliding block 22, the other end of the limiting groove 19 is connected with a stabilizing base 21, the stabilizing base 21 is fixedly connected with the limiting groove 19, the sliding block 22 and the limiting groove 19 are matched in size, the sliding block 22 is symmetrical with respect to a central axis of the movable screw seat 2, and two sliding blocks 22 and two limiting grooves 19 are provided; locating hole 28 has been seted up to stabilizing base 21's side, the size is identical between locating hole 28 and the reference column 29, and be fixed connection between reference column 29 and the support frame 7, adjust cylinder 20 is installed to the bottom of removing lead screw seat 2, it is fixed connection to remove lead screw seat 2 between through adjust cylinder 20 and stabilizing base 21, and remove and be swing joint between lead screw seat 2 and the spacing groove 19, adjust cylinder 20 is installed to the bottom of removing lead screw seat 2, start adjust cylinder 20, let remove lead screw seat 2 downstream, slider 22 cooperation spacing groove 19 can let remove lead screw seat 2 vertical motion.

The comprehensive results show that:

the invention aims at the technical problems that: the conventional DIC-based shaft part size measuring device adopts a workpiece clamping device and a separation mode to measure, so that for the calibration of a probe and a workpiece and the disadvantages of the calibration, if the probe cannot be accurately positioned right above a shaft part, the measured result can generate deviation; the technical scheme of each embodiment is adopted. Meanwhile, the implementation process of the technical scheme is as follows: starting a positioning laser generator 16 at the top of a servo motor 15, adjusting the position between the servo motor 15 and a stabilizing base 21, aligning positioning laser emitted by the positioning laser generator 16 on a positioning center line 17 on the side surface of a probe thrust rod 6, fixing the servo motor 15 by using a motor base 24 so as to fix the positions of the servo motor 15 and the stabilizing base 21, inserting a positioning column 29 into a positioning hole 28, installing a background plate 8, installing a binocular camera 13 by using a camera bracket 12, and adjusting the height of the binocular camera 13 by using an adjusting button 23; then, a shaft part to be measured is inserted into the three-jaw chuck 11, the shaft part is fixed through the operating rod 14, the adjusting cylinder 20 is started, the movable lead screw seat 2 moves downwards, the probe head 9 is contacted with the surface of the shaft part, and the slide block 22 is matched with the limiting groove 19 to enable the movable lead screw seat 2 to move vertically; then, the servo motor 15 is started to drive the shaft part to rotate, and then the driving motor 1 is started to drive the ball screw 3 to rotate, so that the screw nut seat 5 is driven to move along the ball screw 3, and the probe head 9 is driven to move on the central axis of the shaft part; finally, the probe head 9 can move up and down along with the fluctuation of the roundness of the surface of the shaft part, the cross stabilizing block 27 is matched with the limiting channel 25 to prevent the probe thrust rod 6 from moving in the transverse direction, the rolling ball 26 can increase the smoothness of movement between the probe thrust rod 6 and the containing box 4, the thrust spring 18 can be connected with the probe thrust rod 6 and the containing box 4, the binocular camera 13 can shoot the moving image of the speckles 10, the background plate 8 can provide a monochromatic background, so that the interference of other elements is prevented, after data is transmitted, the surface size of the workpiece is calculated according to the movement track of the speckles 10, and high-precision measurement is completed.

Through the setting, above-mentioned technical problem can certainly be solved in this application, simultaneously, realize following technological effect:

according to the invention, the positioning laser generator 16 can be started firstly, then the position between the servo motor 15 and the movable screw seat 2 is adjusted, and the positioning laser emitted by the positioning laser generator 16 is aligned on the positioning center line 17 on the side surface of the probe thrust rod 6, so that the center line of the servo motor 15 can be ensured to be superposed with the midpoint of the probe head 9, a shaft part to be tested can be aligned with the probe head 9, and the accuracy of a measurement result is ensured;

according to the invention, the driving motor 1 is started to drive the ball screw 3 to rotate, so that the screw nut seat 5 is driven to move along the ball screw 3, and the probe head 9 is driven to move on the central axis of the shaft part, and the roundness of the shaft part at different positions can be measured;

according to the invention, the binocular camera 13 can be used for shooting the moving image of the speckles 10, and after data is transmitted, the surface size of the workpiece is calculated according to the motion track of the speckles 10, so that high-precision measurement is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A DIC-based shaft part dimension measuring apparatus, comprising:

a servo motor (15), a motor base (24) is installed at the bottom of the servo motor (15), a positioning laser generator (16) is installed at the top of the servo motor (15), a three-jaw chuck (11) is installed at the output end of the servo motor (15), an operating rod (14) is arranged at the top of the three-jaw chuck (11), a background plate (8) is arranged on one side of the servo motor (15), a support frame (7) is arranged at the rear portion of the background plate (8), a positioning column (29) is installed on one side of the support frame (7), a movable lead screw seat (2) is installed above the background plate (8), a ball screw (3) is arranged inside the movable lead screw seat (2), a driving motor (1) is installed at the input end of the ball screw (3), a lead screw nut seat (5) is sleeved on the outer side of the ball screw (3), an accommodating box (4) is arranged on one side of the lead screw nut seat (5), a thrust spring (18) is installed inside the accommodating box (4), the other end of the thrust spring (18) is connected with a probe thrust rod (6), cross-shaped stabilizing block (27) is arranged around the probe rod (6), a limiting block (27) is arranged on the outer side of the rolling ball limiting block (25), and a limiting block (25) is arranged on the two sides of the rolling ball limiting track (25), the other end of probe thrust rod (6) is provided with probe (9), the surface of cross stable piece (27) is provided with location central line (17), the another side of probe thrust rod (6) is provided with speckle (10), the opposite side of servo motor (15) is provided with support (12) of making a video recording, adjust button (23) are installed to one side of support (12) of making a video recording, the internally mounted of support (12) of making a video recording has two mesh cameras (13).

2. DIC-based shaft part dimensioning arrangement according to claim 1, characterized in that said mobile screw carriage (2) further comprises:

the slider (22), it is installed the both sides of removing lead screw seat (2), the outside of slider (22) is provided with spacing groove (19), the other end of spacing groove (19) is connected with stabilizing base (21), locating hole (28) have been seted up to stabilizing base's (21) side, adjust cylinder (20) are installed to the bottom of removing lead screw seat (2).

3. The DIC-based shaft feature dimension measuring device of claim 2 wherein the stabilizing base (21) is fixedly attached to the retaining groove (19) and the slide (22) is dimensionally engaged with the retaining groove (19).

4. The DIC-based shaft part dimension measuring device of claim 2, wherein the movable lead screw base (2) is fixedly connected with the stabilizing base (21) through an adjusting cylinder (20), and the movable lead screw base (2) is movably connected with the limiting groove (19).

5. The DIC-based shaft part dimension measuring device of claim 1 wherein the probe thrust rod (6) is elastically connected to the housing (4) via a thrust spring (18) and the probe thrust rod (6) is fixedly connected to the probe head (9).

6. The DIC-based shaft part dimension measuring device of claim 1, wherein the housing box (4) is fixedly connected with the screw nut seat (5), and the probe thrust rod (6) is movably connected with the housing box (4).

7. The DIC-based shaft part dimension measuring device of claim 1 wherein the positioning laser generator (16) is fixedly connected to the servo motor (15) and the centerline of the positioning laser generator (16) is vertically parallel to the central axis of the output of the servo motor (15).

8. DIC-based shaft part dimension measuring device according to claim 2, characterized in that the positioning hole (28) and the positioning post (29) are matched in dimension, and the positioning post (29) is fixedly connected with the support frame (7).

9. The DIC-based shaft feature dimension measuring device of claim 1 wherein the cross stabilizing block (27) is fixedly connected to the probe thrust rod (6) and the cross stabilizing block (27) is matched to the position limiting track (25).

10. DIC-based shaft part dimension measuring device according to claim 2, characterised in that the slide (22) is symmetrical in relation to the central axis of the moving spindle bearing (2), and that two slide (22) and two limit grooves (19) are provided.