CN210862558U - Contour measuring device for mechanical parts - Google Patents
Contour measuring device for mechanical parts Download PDFInfo
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- CN210862558U CN210862558U CN201921070794.3U CN201921070794U CN210862558U CN 210862558 U CN210862558 U CN 210862558U CN 201921070794 U CN201921070794 U CN 201921070794U CN 210862558 U CN210862558 U CN 210862558U
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Abstract
The utility model discloses a machine parts profile measuring device relates to industrial measurement technical field. The device comprises an object space telecentric system and an image space telecentric system; object space telecentric system is preceding fixed group, and image space telecentric system includes: a zoom group, a compensation group and a post-fixation group. The device keeps the magnification of an object image space unchanged within a unit working distance by moving the zoom group and the compensation group and simultaneously linking the two groups. The object space telecentric system can eliminate errors caused by inaccurate focusing of the object space, and the image space telecentric system can eliminate measurement errors caused by inaccurate focusing of the image space. The image space telecentric effect is combined with the backlight source for irradiation, so that the contour images of the parts with different sizes (30-90mm) processed on line can be collected into a computer in real time through an image system and compared with a processing drawing, the detection and correction of the surface contour of the product can be visually and clearly completed, the processing efficiency of workers is comprehensively improved, and the measurement precision is ensured.
Description
Technical Field
The utility model relates to an industrial measurement technical field especially relates to a machine parts profile measuring device.
Background
In China, machining enterprises such as cutters and gears are numerous, and the contourgraph is widely applied to production and machining. The traditional contourgraph mainly adopts a projection lens imaging mode to observe, the sensitivity of the detection instrument is not high, the lens matched with each contourgraph is a lens with a fixed magnification aiming at parts such as shafts, gears, cutters, splines and gaskets with different sizes, the field of view is limited, the magnification is not fixed under different object distances, and the comparison error is larger. Therefore, the existing equipment has the problem of large error.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a machine parts profile measuring device has solved the great problem of existing equipment error.
In order to achieve the above object, the utility model provides a following scheme:
a machine part profile measuring device comprises: an object space telecentric system, an aperture diaphragm and an image space telecentric system;
the object space telecentric system comprises a front cemented lens group and a rear cemented lens group; the image space telecentric system comprises a zoom group, a compensation group and a rear fixed group;
the front gluing lens group, the rear gluing lens group, the aperture diaphragm, the zoom group, the compensation group and the rear fixing group are arranged in sequence from an object space to an image space;
and the exit pupil position of the object-side telecentric system is superposed with the entrance pupil position of the image-side telecentric system.
Optionally, the front cemented lens group includes a first lens and a second lens;
the first lens is a positive meniscus lens with negative focal power, and the convex surface of the first lens faces the object space;
the second lens is a biconvex lens with positive focal power;
the concave surface of the first lens is cemented with one convex surface of the second lens.
Optionally, the rear cemented lens group includes a third lens and a fourth lens;
the third lens is a positive meniscus lens with negative focal power, and the convex surface of the third lens faces the object space;
the fourth lens is a biconvex lens with positive focal power;
the concave surface of the third lens is cemented with one convex surface of the fourth lens.
Optionally, the variable power group includes a fifth lens and a sixth lens;
the fifth lens is a negative meniscus lens with positive focal power, and the concave surface of the fifth lens faces the object space;
the sixth lens is a negative meniscus lens with negative focal power, and the concave surface of the sixth lens faces the object space;
the convex surface of the fifth lens is glued with the concave surface of the sixth lens.
Optionally, the compensation group comprises a seventh lens and an eighth lens;
the seventh lens is a biconvex lens with positive focal power;
the eighth lens is a negative meniscus lens with negative focal power, and the concave surface of the eighth lens faces the object space;
one convex surface of the seventh lens is cemented with the concave surface of the eighth lens.
Optionally, the rear fixed group includes a ninth lens and a tenth lens;
the ninth lens is a positive meniscus lens with positive focal power, and the concave surface of the ninth lens faces the object space;
the tenth lens is a positive meniscus lens with negative focal power, and the convex surface of the tenth lens faces the object space;
one convex surface of the ninth lens is cemented with the convex surface of the tenth lens.
Optionally, the method further includes: a plurality of space rings;
the space rings are respectively arranged between the front gluing lens group and the rear gluing lens group, and between the rear gluing lens group and the aperture diaphragm.
Optionally, the method further includes: a front fixed group lens barrel, a moving lens barrel and a rear fixed group lens barrel;
the front gluing lens group and the rear gluing lens group are fixed in the front fixing lens barrel;
the zooming group and the compensation group are in sliding connection with the moving lens barrel;
the rear fixing group is fixed in the rear fixing group lens barrel;
the front fixed group lens barrel is connected with the moving lens barrel through threads;
the movable lens cone and the rear fixed group lens cone are connected through threads.
Optionally, the method further includes: a first motor and a second motor;
the zooming group is fixed on the first motor through a pin; the first motor is used for driving the zoom group to make a specified motion;
the compensation group is fixed on the second motor through a pin; the second motor is used for driving the compensation group to make a specified movement.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the utility model provides a machine parts profile measuring device. The device comprises an object space telecentric system and an image space telecentric system; object space telecentric system is preceding fixed group, and image space telecentric system includes: a zoom group, a compensation group and a post-fixation group. The device keeps the magnification of an object image space unchanged within a unit working distance by moving the zoom group and the compensation group and simultaneously linking the two groups. The object space telecentric system can eliminate errors caused by inaccurate focusing of the object space, and the image space telecentric system can eliminate measurement errors caused by inaccurate focusing of the image space. The image space telecentric effect is combined with the backlight source for irradiation, so that the contour images of the parts with different sizes (30-90mm) processed on line can be collected into a computer in real time through an image system and compared with a processing drawing, the detection and correction of the surface contour of the product can be visually and clearly completed, the processing efficiency of workers is comprehensively improved, and the measurement precision is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a structural diagram of a device for measuring a contour of a mechanical component according to an embodiment of the present invention;
fig. 2 is a light path diagram of the device for measuring the contour of a mechanical part according to the embodiment of the present invention;
fig. 3 is a structural diagram of the variation of the zoom group and the compensation group according to the embodiment of the present invention;
fig. 4 is a prescribed graph of the zoom group according to the embodiment of the present invention;
fig. 5 is a prescribed graph of a compensation group according to an embodiment of the present invention;
fig. 6 is a 3-time zoom diagram of the device for measuring the contour of a mechanical component according to the embodiment of the present invention.
Wherein, 1, a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. an aperture diaphragm; 6. a fifth lens; 7. a sixth lens; 8. a seventh lens; 9. an eighth lens; 10. a ninth lens; 11. a tenth lens; 12. zooming group; 13. a compensation group; 14. a rear fixed group; 15. zooming group curve; 16. a compensation group curve; 17. an image space focus; 18. the image space height; 19. the height of the object space; 20. a front cemented lens group; 21. and a rear gluing mirror group.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a structural diagram of a device for measuring a contour of a mechanical component according to an embodiment of the present invention; fig. 2 is a light path diagram of the device for measuring the contour of a mechanical component according to the embodiment of the present invention.
Referring to fig. 1 and 2, the device for measuring the contour of a mechanical part includes: an object space telecentric system, an aperture diaphragm 5 and an image space telecentric system. The exit pupil position of the object-side telecentric system coincides with the entrance pupil position of the image-side telecentric system.
The object space telecentric system is a front fixed group and comprises a front cemented lens group 20 and a rear cemented lens group 21.
The front cemented lens group 20 is a positive power lens group, and the front cemented lens group 20 includes a first lens 1 and a second lens 2. The rear cemented lens group 21 is a positive power lens group, and the rear cemented lens group 21 includes a third lens 3 and a fourth lens 4.
The first lens 1 is a positive meniscus lens with negative focal power, and the convex surface of the first lens 1 faces the object space.
The second lens 2 is a biconvex lens of positive optical power.
The concave surface of the first lens 1 is cemented with one convex surface of the second lens 2.
The third lens 3 is a positive meniscus lens with negative focal power, and the convex surface of the third lens 3 faces the object space.
The fourth lens 4 is a biconvex lens of positive optical power.
The concave surface of the third lens 3 is cemented with one convex surface of the fourth lens 4.
The front and rear cemented lens groups 20 and 21 are double gauss in structure. The utility model discloses two sets of cemented lens of preceding cemented lens group 20 and back cemented lens group 21 of object space telecentric system adopt two gauss refraction structures of symmetry formula, are favorable to proofreading and correct the colour difference, improve the imaging quality.
The first lens 1 and the third lens 3 are made of crown glass with low dispersion coefficient, the abbe number of the first lens 1 is 70.13, the abbe number of the third lens 3 is 64.11, the dispersion coefficient of the first lens 1 and the dispersion coefficient of the third lens 3 are inversely proportional to the abbe number, and the smaller the dispersion coefficient is, the clearer the imaging is. The second lens 2 and the fourth lens 4 are made of flint glass with high refractive index, the refractive index of the second lens 2 is 1.80, and the refractive index of the fourth lens 4 is 1.78. The utility model discloses a crown glass of low dispersion coefficient, dispersion coefficient is less, and the formation of image is more clear. The object space telecentric system is sequentially provided with a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 along the optical axis direction, which is beneficial to correcting astigmatism and a field region, and the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are all positive-negative focal power lenses, which is beneficial to correcting high-order aberration of an off-axis point.
The image space telecentric system comprises a variable magnification group 12, a compensation group 13 and a rear fixed group 14.
The variable power group 12 is a positive power lens group, and the variable power group 12 includes a fifth lens 6 and a sixth lens 7.
The fifth lens 6 is a negative meniscus lens with positive refractive power, and the concave surface of the fifth lens 6 faces the object space.
The sixth lens 7 is a negative meniscus lens with negative refractive power, and the concave surface of the sixth lens 7 faces the object.
The convex surface of the fifth lens 6 is cemented with the concave surface of the sixth lens 7.
The zoom group 12 is composed of a fifth lens 6 and a sixth lens 7 in sequence along the optical axis direction, which is beneficial to dispersing focal power burden and correcting spherical aberration.
The compensation group 13 is a positive power lens group, and the compensation group 13 includes a seventh lens 8 and an eighth lens 9.
The seventh lens 8 is a biconvex lens of positive optical power.
The eighth lens 9 is a negative meniscus lens with negative refractive power, and the concave surface of the eighth lens 9 faces the object.
One convex surface of the seventh lens 8 is cemented with the concave surface of the eighth lens 9.
The compensation group 13 is sequentially provided with a seventh lens 8 and an eighth lens 9 along the optical axis direction, which is beneficial to dispersing focal power burden and correcting spherical aberration.
The rear fixed group 14 is a positive power lens group, and the rear fixed group 14 includes a ninth lens 10 and a tenth lens 11.
The ninth lens 10 is a positive meniscus lens with positive power, and the concave surface of the ninth lens 10 faces the object.
The tenth lens 11 is a positive meniscus lens with negative refractive power, and the convex surface of the tenth lens 11 faces the object side.
One convex surface of the ninth lens 10 is cemented with the convex surface of the tenth lens 11. The rear fixed group 14 includes a ninth lens 10 and a tenth lens 11 in this order in the optical axis direction.
The distance between the eighth lens 9 and the ninth lens 10 is 1.5mm-10.5 mm.
The front cemented lens group 20, the rear cemented lens group 21, the aperture diaphragm 5, the zoom group 12, the compensation group 13 and the rear fixed group 14 are arranged in sequence from the object space to the image space. The surface of each lens group is spherical or plane. The utility model discloses a lens surface type be sphere or plane, do not introduce the aspheric surface to reduce processing and the installation and debugging degree of difficulty, reduce cost.
The mechanical part profile measuring device further comprises: a plurality of cage rings.
The spacing rings are respectively arranged between the front gluing lens group 20 and the rear gluing lens group 21, and between the rear gluing lens group 21 and the aperture diaphragm 5. The method specifically comprises the following steps: the space ring is arranged between the second lens 2 and the third lens 3, and the distance between the second lens 2 and the third lens 3 is 20 +/-0.02 mm. The space ring is arranged between the fourth lens 4 and the aperture diaphragm 5, the space ring endoscope close to the fourth lens 4 is 18mm, the inner diameter of the aperture diaphragm 5 is 2mm, and the distance of the space ring is 68 mm.
The mechanical part profile measuring device further comprises: a front fixed group lens barrel, a moving lens barrel and a rear fixed group lens barrel. The length of the front fixed group lens barrel is 60mm, the length of the moving lens barrel is 59mm, and the distance from the rear fixed group lens barrel to the image side is 20 mm.
The front fixed group lens barrel and the movable lens barrel are connected through threads. The movable lens cone and the rear fixed group lens cone are connected through threads.
The front cemented lens group 20 and the rear cemented lens group 21 are fixed in the front fixed group barrel.
The zooming group 12 and the compensation group 13 are connected with the moving lens barrel in a sliding way. The zoom group 12 is located at one end of the moving lens barrel close to the object side, and the compensation group 13 is located at one end of the moving lens barrel close to the image side. The diameters of the fifth lens 6 and the sixth lens 7 of the variable power group 12, and the diameters of the seventh lens 8 and the eighth lens 9 of the compensation group 13 are each 10mm or half of the diameter of the moving barrel.
Fig. 4 is a prescribed graph of the variable power group according to the embodiment of the present invention, in fig. 4, the horizontal axis represents the focal length of the mechanical component profile measuring device, and the vertical axis represents the moving distance of the variable power group, and the unit is: millimeters (mm).
Fig. 5 is a prescribed graph of the compensation group according to the embodiment of the present invention, in fig. 5, the horizontal axis represents the focal length of the mechanical component profile measuring device, and the vertical axis represents the moving distance of the compensation group, and the unit is: millimeters (mm). Referring to fig. 4 and 5, the inner wall of the moving lens barrel includes: a zoom group track and a compensation group track. The track of the zooming group track is that a zooming group curve 15 starts from one end of the moving lens barrel close to the object space, rotates a circle along the inner wall of the moving lens barrel, and ends in the middle of the moving lens barrel. The track of the compensation group track is that the compensation group curve 16 starts from one end of the moving lens barrel close to the image space, rotates a circle along the inner wall of the moving lens barrel, and ends in the middle of the moving lens barrel. A gap exists between one end of the zooming group track positioned in the middle of the moving lens cone and one end of the compensation group track positioned in the middle of the moving lens cone. When the zooming group 12 and the compensation group 13 respectively start to move from two ends of the moving lens barrel to the middle of the moving lens barrel, the focal length of the mechanical part contour measuring device is changed to 11-41 mm. The variable-magnification group 12 moves linearly in the moving lens barrel according to the variable-magnification group curve 15, and the moving amount is 1-25 mm. The compensation group 13 moves nonlinearly in the moving lens cone according to the compensation group curve 16, the moving amount is 1-34mm, and the zoom group 12 and the compensation group 13 move in the moving lens cone in a double-group linkage manner.
The zooming group 12 moves according to the zooming group curve 15, the second motor drives the compensation group 13 to move according to the compensation group curve 16, the zooming group 12 and the compensation group 13 are driven to move according to the specified curve of the figure 4 through the first motor and the second motor, the zooming group 12 is linked with the compensation group 13, the continuous zooming effect is achieved, and the requirements of online detection of parts with different sizes are met.
Fig. 3 is a structural diagram of the variation of the zoom group and the compensation group according to the embodiment of the present invention, referring to fig. 3, wherein (a) is a structural diagram in which the zoom group 12 and the compensation group 13 are respectively located at two ends of the moving lens barrel, (b) is a structural diagram in which the zoom group 12 is located at the middle position of the zoom group track and the compensation group 13 is located at the middle position of the compensation group track, and (c) is a structural diagram in which the zoom group 12 and the compensation group 13 are respectively located at the middle position of the moving lens barrel. The utility model discloses a mechanical compensation method structure of zooming, through the variable power group 12 and the compensation group 13 of adjusting image space telecentric systems, linear motion is done to variable power group 12, and compensation group 13 is non-linear motion, reaches the effect of zooming. The lateral arrows in (a) of fig. 3 indicate the adjustment ranges of the magnification-varying group 12 and the compensation group 13 in the moving lens barrel.
The rear fixed group 14 is fixed in the rear fixed group barrel.
In this embodiment, light rays exit from the object space, sequentially pass through the front cemented lens group 20, the rear cemented lens group 21, the aperture stop 5, the zoom group 12, the compensation group 13, and the rear fixed group 14, and then reach the image space focus 17.
The mechanical part profile measuring device further comprises: a first motor and a second motor.
The zooming group 12 is fixed on the first motor through a pin; the first motor is used for driving the zooming group 12 to make a specified motion, that is, the first motor drives the zooming group 12 to make a linear motion along the zooming group curve 15 on the zooming group track.
The compensation group 13 is fixed on the second motor through a pin; the second motor is used for driving the compensation group 13 to make a specified motion, that is, the second motor drives the compensation group 13 to make a nonlinear motion along the compensation group curve 16 on the compensation group track.
The following problems exist with the existing profiler systems on the market: 1. the projection system changes along with the object distance, the magnification ratio is not fixed, and the comparison error is larger; 2. for mechanical parts with different sizes, double telecentric systems with different multiplying powers need to be selected, so that the processing efficiency of workers is reduced; 3. the existing contourgraph is a large-view-field projection system, the view field is large, and the object distance is not fixed. Therefore, the existing contourgraph can not meet the requirements of real-time on-line detection of mechanical parts with different sizes and can not accurately measure mechanical parts such as gears and the like.
Fig. 6 is a 3 times zoom diagram of the contour measuring device for mechanical parts in the embodiment of the present invention, referring to fig. 6, the zoom in the embodiment is an object-to-image ratio, the object-to-image ratio is an object-to-image height divided by an image-to-image height, and the image-to-image height 18 in the embodiment is a fixed value. Fig. 6 (a) is a 1-time zoom view of the mechanical part profile measuring device, that is, when the zoom group 12 and the compensation group 13 are respectively located at two ends of the moving lens barrel, the object space height 19 is 30 mm; (b) the device is a 2-time zoom diagram of the mechanical part profile measuring device, namely the zoom group 12 is positioned in the middle of the zoom group track, and the object space height 19 is 60mm when the compensation group 13 is positioned in the middle of the compensation group track; (c) the object space height 19 is 90mm when the 3-time zoom image of the mechanical part contour measuring device, namely the zoom group 12 and the compensation group 13 are respectively positioned in the middle of the moving lens barrel. Through adjusting the group 12 and the compensation group 13 of becoming doubly of image space telecentric systems, make the utility model discloses a mechanical parts profile measuring device reaches 3 times and zooms.
The utility model discloses a mechanical parts profile measuring device, compare with current tight double telecentric system, adopt the mode that tight object space telecentric system combines together with the image space telecentric system that zooms, utilize object image space telecentric characteristics, drive the zoom group and the compensation group through first motor and second motor and remove, zoom group and compensation group linkage, in unit working distance, keep object image space magnification unchangeable, because object space telecentric system itself can eliminate the error that the object space brought because the focusing is inaccurate, image space telecentric system can eliminate the measurement error that the image space focusing is inaccurate to introduce, so the comprehensive image space telecentric action, with the backlight irradiation, have in real time with the different size (30-90mm) part profile image of online processing gather the computer through image system, compare with the processing drawing, can be directly perceived, clear accomplish the detection and the correction of product surface profile, the method can also be used for detecting the contour sizes of parts with different sizes on line.
The utility model discloses an adjust zoom group and compensation group and reach the purpose of zooming, change the object space visual field, because two telecentric system object space multiplying power is invariable under the unit thing distance, do not have focusing error and reading error, so can the size of accurate measurement gear, and then carry out the size and compare, compare and judge the deviation between measured object and the given size, whether the article size that detects processing accords with the machining error, the difference requirement between the article of actual processing and its design size promptly.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. A machine part profile measuring device, comprising: an object space telecentric system, an aperture diaphragm and an image space telecentric system;
the object space telecentric system comprises a front cemented lens group and a rear cemented lens group; the image space telecentric system comprises a zoom group, a compensation group and a rear fixed group;
the front gluing lens group, the rear gluing lens group, the aperture diaphragm, the zoom group, the compensation group and the rear fixing group are arranged in sequence from an object space to an image space;
and the exit pupil position of the object-side telecentric system is superposed with the entrance pupil position of the image-side telecentric system.
2. The mechanical part contour measuring device as recited in claim 1, wherein said front glue lens group comprises a first lens and a second lens;
the first lens is a positive meniscus lens with negative focal power, and the convex surface of the first lens faces the object space;
the second lens is a biconvex lens with positive focal power;
the concave surface of the first lens is cemented with one convex surface of the second lens.
3. The mechanical part profile measuring device as recited in claim 1, wherein the rear glue mirror group includes a third lens and a fourth lens;
the third lens is a positive meniscus lens with negative focal power, and the convex surface of the third lens faces the object space;
the fourth lens is a biconvex lens with positive focal power;
the concave surface of the third lens is cemented with one convex surface of the fourth lens.
4. The mechanical part profile measuring device of claim 1, wherein the variable power group includes a fifth lens and a sixth lens;
the fifth lens is a negative meniscus lens with positive focal power, and the concave surface of the fifth lens faces the object space;
the sixth lens is a negative meniscus lens with negative focal power, and the concave surface of the sixth lens faces the object space;
the convex surface of the fifth lens is glued with the concave surface of the sixth lens.
5. The mechanical part profile measuring device of claim 1, wherein the compensation group includes a seventh lens and an eighth lens;
the seventh lens is a biconvex lens with positive focal power;
the eighth lens is a negative meniscus lens with negative focal power, and the concave surface of the eighth lens faces the object space;
one convex surface of the seventh lens is cemented with the concave surface of the eighth lens.
6. The mechanical part contour measuring device of claim 1, wherein the rear mounting group includes a ninth lens and a tenth lens;
the ninth lens is a positive meniscus lens with positive focal power, and the concave surface of the ninth lens faces the object space;
the tenth lens is a positive meniscus lens with negative focal power, and the convex surface of the tenth lens faces the object space;
one convex surface of the ninth lens is cemented with the convex surface of the tenth lens.
7. The machine part profile measuring device of claim 1, further comprising: a plurality of space rings;
the space rings are respectively arranged between the front gluing lens group and the rear gluing lens group, and between the rear gluing lens group and the aperture diaphragm.
8. The machine part profile measuring device of claim 1, further comprising: a front fixed group lens barrel, a moving lens barrel and a rear fixed group lens barrel;
the front gluing lens group and the rear gluing lens group are fixed in the front fixing lens barrel;
the zooming group and the compensation group are in sliding connection with the moving lens barrel;
the rear fixing group is fixed in the rear fixing group lens barrel;
the front fixed group lens barrel is connected with the moving lens barrel through threads;
the movable lens cone and the rear fixed group lens cone are connected through threads.
9. The machine part profile measuring device of claim 1, further comprising: a first motor and a second motor;
the zooming group is fixed on the first motor through a pin; the first motor is used for driving the zoom group to make a specified motion;
the compensation group is fixed on the second motor through a pin; the second motor is used for driving the compensation group to make a specified movement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921070794.3U CN210862558U (en) | 2019-07-10 | 2019-07-10 | Contour measuring device for mechanical parts |
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| CN201921070794.3U CN210862558U (en) | 2019-07-10 | 2019-07-10 | Contour measuring device for mechanical parts |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608682A (en) * | 2019-07-10 | 2019-12-24 | 长春理工大学 | Contour measuring device for mechanical parts |
| CN114166127A (en) * | 2021-12-08 | 2022-03-11 | 福鼎市一雄光学仪器有限公司 | Reinforcing steel bar size detector |
-
2019
- 2019-07-10 CN CN201921070794.3U patent/CN210862558U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608682A (en) * | 2019-07-10 | 2019-12-24 | 长春理工大学 | Contour measuring device for mechanical parts |
| CN114166127A (en) * | 2021-12-08 | 2022-03-11 | 福鼎市一雄光学仪器有限公司 | Reinforcing steel bar size detector |
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Granted publication date: 20200626 Termination date: 20210710 |