CN114111680B - High-precision detection device and detection method for spiral tip tap chute core diameter - Google Patents
High-precision detection device and detection method for spiral tip tap chute core diameter Download PDFInfo
- Publication number
- CN114111680B CN114111680B CN202111495816.2A CN202111495816A CN114111680B CN 114111680 B CN114111680 B CN 114111680B CN 202111495816 A CN202111495816 A CN 202111495816A CN 114111680 B CN114111680 B CN 114111680B
- Authority
- CN
- China
- Prior art keywords
- tap
- shaped groove
- clamping block
- spiral tip
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 241000209094 Oryza Species 0.000 claims description 17
- 235000007164 Oryza sativa Nutrition 0.000 claims description 17
- 235000009566 rice Nutrition 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides a high-precision detection device and a detection method for the core diameter of a spiral tip screw tap chute, comprising a workbench of a large industrial display instrument, and the high-precision detection device is characterized in that: the screw tap clamping tool comprises a pair of guide posts which are arranged up and down symmetrically, a right side rod and a left side rod which are arranged left and right symmetrically, and springs which are arranged at two ends of the guide posts; the guide post is connected with threads arranged at the two end parts of the guide post through nuts; the screw tap is characterized by further comprising a V-shaped groove clamping block and a flat clamping block, wherein a handle part of the screw tap is arranged between the V-shaped groove clamping block and the flat clamping block, the elastic force of the spring is adjusted through an adjusting nut to clamp the screw tap in the V-shaped groove, and then the screw tap is integrally moved to the workbench for detecting the chute core diameter of the screw tap; and detecting the diameter radius size r of the chute core through the steps of finding the center point, finding the vertical line, resetting the center coordinate to zero and finding the tangent line. The invention has the advantages of convenient and quick clamping, high detection precision and obviously improved working efficiency.
Description
Technical Field
The invention belongs to the technical field of cutting tool manufacturing, relates to a spiral tip tap, and in particular relates to a high-precision detection device and a detection method for the chute core diameter of the spiral tip tap.
Background
With the technical development and application of cutting tool technology, spiral tip taps have been widely used in various industrial processing fields. In the prior art, the thickness of the chute core of the spiral tip tap is measured by a vernier caliper or a tip micrometer, and the error is about 0.03mm because the front end groove is an inclined groove and cannot be accurately measured, while the diameter of the chute core of the spiral tip tap is an important parameter of the spiral tip tap and is particularly important to accurately measure, but no effective, simple and convenient detection method for testing is available at present.
Disclosure of Invention
In order to overcome the problems, the invention aims to provide a detection device and a detection method for measuring the chute core diameter of a spiral tip tap, so as to realize accurate measurement of the chute core diameter of the spiral tip tap.
The utility model provides a high accuracy detection device of spiral tip screw tap chute core footpath, includes the workstation of installing big worker and shows the instrument, its characterized in that: the clamping tool of the spiral tip tap is also included;
The clamping tool comprises a pair of guide posts (1) which are arranged vertically symmetrically and side rods (7) which are arranged horizontally symmetrically, wherein the guide posts (1) and the end parts of the side rods (7) are assembled through screw thread pairs to form a rectangular frame structure; the two ends of the side rod (7) are provided with screw holes, and the guide post (1) passes through the screw holes and is connected with threads arranged at the two ends of the guide post (1) through nuts (6); the frame structure also comprises a group of clamping block assemblies;
The clamping block assembly comprises a group of trapezoidal V-shaped groove clamping blocks (2) and flat clamping blocks (3) which are oppositely arranged, and through holes which are assembled with the guide posts (1) are formed in the positions, close to the end parts, of the V-shaped groove clamping blocks (2) and Ping Gakuai; the spring (4) is arranged between the parts, which are outside the through hole and are close to the left end and the right end of the guide post (1), of the through hole; the inner center part of the V-shaped groove clamping block (2) is cut with a V-shaped groove (V); a shank (B) of a pointed tap is placed between the V-shaped groove (V) and the inner side of the Ping Gakuai (3), and the elastic force of the elastic yellow (4) is adjusted by adjusting the nut (6) so as to clamp the pointed tap in the V-shaped groove (V); the V-shaped groove (V) is perpendicular to the horizontal surface of the bottom surface of the V-shaped groove clamping block (2), so that the tap is in a vertical state during clamping, namely, when the tap is also perpendicular to the horizontal surface of the bottom surface, the tap is integrally moved to the workbench to perform detection test on the core diameter of the chute of the tap.
The further improvement is that the maximum horizontal width of the V-shaped groove (V) is the same as that of the Ping Gakuai (3), the thickness of the V-shaped groove is more than or equal to 1.5 times of the diameter of the handle part (B), and the thickness of the V-shaped groove is more than or equal to 3 times of the diameter of the handle part (B).
The further improvement is that the opening angle of the V-shaped groove (V) is 90 degrees, and the opening depth of the V-shaped groove (V) is more than or equal to 1/2 of the diameter of the handle part (B).
The invention also provides a detection method based on the high-precision detection device for the spiral tip tap chute core diameter, which is characterized by comprising the following detection steps of:
step1, finding a center point: the four broken lines form a rice word line seen by a display field of a large-scale instrument; adjusting a workbench of a large industrial display instrument, moving the spiral tip tap and enabling the center (O') of the top axis of the spiral tip tap to coincide with the center (O) of the rice word line;
step 2, finding a vertical line: by manually rotating the clamping tool, a workbench of a large display instrument is moved left and right, so that a straight line (1) in a spiral tip groove shape of the spiral tip tap is overlapped with a vertical line (c) of the vertical rice word line, and meanwhile, the position of the center (O') of the top axis of the spiral tip tap is on a horizontal line(s) of the rice word line;
step 3, resetting the central coordinates: keeping the tap point tap still, moving a workbench of the large industrial display instrument along the X axis, enabling the center (O) of the rice word line to coincide with the tip of the center (O') of the tap point tap, and clearing X, Y values displayed on a display of the large industrial display instrument;
And 4, finding a phase tangent line: and (3) moving a workbench of a large industrial display to read a value when a center vertical line (c) of the rice word line is tangent to a straight line (1) in the groove shape of the spiral tap, and longitudinally moving an X axis at the moment, wherein a numerical value displayed by a display is the diameter size (r) of the chute core diameter.
Compared with the prior art, the invention has the beneficial technical effects that:
1. due to the fact that the clamping tool is used, the high-precision clamping requirement during chute core diameter detection is met, the screw tap can be vertically and vertically clamped, and detection is convenient and quick.
2. The perpendicularity error of the V-shaped groove and the horizontal plane of the bottom surface of the V-shaped groove clamp splice meets the requirement of less than or equal to 0.01mm, and meanwhile, the central axis of the spiral tip tap can be effectively ensured to be perpendicular to the horizontal planes of the bottoms of the two clamp splice.
3. The detection method of the invention takes the center of the spiral tip tap as a reference to measure accurately, and the reading of a digital display with a large industrial display can be accurate to 0.001mm, thus solving the technical problem of inaccurate measurement of the diameter radius dimension (r) of the chute core.
4. The invention has stable use performance in detection test and obviously improves the working efficiency.
Drawings
FIG. 1 is a schematic view of the structure of a tap to be inspected according to the present invention.
FIG. 2a is a schematic structural view of a high-precision detecting device for the chute core diameter of a tap according to the present invention.
Fig. 2b is a right side view of fig. 2a of the present invention.
FIG. 3 is a schematic diagram of the centering point of the present invention.
Fig. 4 is a schematic diagram of the vertical line finding method of the present invention.
FIG. 5 is a schematic diagram of the center coordinate zeroing of the tap according to the invention.
FIG. 6 is a schematic diagram of finding a tangent line according to the present invention.
In the figure, 1-guide post, 2-V groove clamping block, 3-flat clamping block, 4-spring, 7-side rod, 6-nut, V-shaped groove, O-the center of the meter word line of the large industrial display instrument, O' -the center of the top axis of the spiral tap, 1-the straight line in the spiral tip groove of the spiral tap, c-the vertical line, s-the horizontal line of the meter word line, r-the radius of the chute core diameter, B-the handle of the spiral tip tap, M-the spiral tip, V-shaped groove, X-the moving direction along the horizontal axis of the meter word line and Y-the moving direction along the vertical line of the meter word line.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In the embodiment, the spiral tip tap with the specification of M3-M10 in GB/T28254-2012 spiral tip tap is adopted for detection, and the detection method of the chute core diameter r is described in detail.
As shown in fig. 1, the structure of the spiral tip tap to be tested according to the invention is schematically shown, which comprises a shank portion B and a tip portion M of the spiral tip tap. The chute core diameter r of the tip part M of the spiral tip tap is detected by means of the existing large industrial display instrument with the model JX6, a workbench thereof and a self-made spiral tip tap clamping tool.
As shown in fig. 2a and 2b, the high-precision detecting device for the spiral tip tap chute core diameter is shown in a structural schematic view and a right side view respectively. By means of a workbench of a large industrial display instrument, a clamping tool for assembling a set of spiral tip tap is designed and assembled, and the clamping tool is of a rectangular frame structure. The device comprises a pair of identical guide posts 1 which are arranged vertically symmetrically and a pair of identical side bars 7 which are arranged horizontally symmetrically, wherein the guide posts 1 and the end parts of the side bars 7 are assembled through screw thread pairs to form a rectangular frame structure; the spring 4 is assembled at the position of the guide post 1 close to the two end parts, screw holes are arranged at the two end parts of the side bar 7, and the guide post 1 passes through the screw holes and is connected with threads arranged at the two end parts of the guide post 1 through nuts 6; a set of clamp block assemblies is also included within the frame structure.
The clamping block assembly comprises a group of trapezoidal V-shaped groove clamping blocks 2 and flat clamping blocks 3 which are oppositely arranged, and through holes which are assembled with the guide posts 1 are formed in the positions, close to the end parts, of the V-shaped groove clamping blocks 2 and the flat clamping blocks 3; the spring 4 is arranged between the outer side of the clamp block assembly and the left and right parts close to the end parts of the guide post 1; the V-shaped groove V is cut in the center of the inner side of the V-shaped groove clamping block2, the opening angle of the V-shaped groove V is 90 degrees, and the opening depth of the V-shaped groove V is more than or equal to 1/2 of the diameter of the handle part B, so that the effect is optimal.
A shank B of a pointed screw tap is arranged between the V-shaped groove V and the inner side of the flat clamping block 3, the elastic force of the elastic yellow 4 is adjusted through adjusting the nut 6 so as to clamp the pointed screw tap in the V-shaped groove V, and the pointed screw tap is embedded in the V-shaped groove V and is contacted with two side lines of the V-shaped groove; meanwhile, the spiral tip tap is also in line contact with the left inner side surface of the flat clamping block 3, the line contact position and the right outer side surface of the flat clamping block 3 are the maximum horizontal width of the flat clamping block 3, the maximum horizontal width (i.e. the height of a trapezoid) of the V-shaped groove V and the flat clamping block 3 is the same, the maximum horizontal width is more than or equal to 1.5 times of the diameter of the handle B, and the effect is optimal when the thickness of the V-shaped groove V and the thickness of the flat clamping block 3 are more than or equal to 3 times of the diameter of the handle B. The V-shaped groove V is perpendicular to the horizontal surface of the bottom surface of the V-shaped groove clamping block 2; and after the spiral tip tap is in a vertical state during clamping, namely, the spiral tip tap is also vertical to the horizontal surface of the bottom surface, the spiral tip tap is integrally moved and placed on the workbench, and the following detection test of the spiral tip tap chute core diameter is performed.
The invention uses the principle that: when the clamping tool is used, the perpendicularity error of the V-shaped groove of the clamping tool of the spiral tip tap and the horizontal plane of the bottom surface of the V-shaped groove clamping block is guaranteed to be less than or equal to 0.01mm, and therefore the two clamping blocks can slide on the guide post. When the screw tap is not used, the left clamping block and the right clamping block are abutted together under the action of the elastic force of 4 springs, the two clamping blocks can be pulled away from two sides by two hands during clamping, the cylindrical handle of the screw tap is inserted into the V-shaped groove of the left clamping block, the handle of the screw tap is clamped between the V-shaped groove and the right flat clamping block by the spring force, the axis of the screw tap is vertical to the horizontal plane of the bottom surface of the clamping block, and the radial dimension r of the diameter of the chute core of the screw tap can be detected by the following steps.
Step 1, finding a center point: FIG. 3 is a schematic diagram of the present invention for centering, wherein four dashed lines form a rice word line seen by a large industrial display field of view; and (3) adjusting a workbench of a large industrial display, and moving the spiral tip tap to enable the center O' of the top axis of the spiral tip tap to coincide with the center O of the rice word line.
Step 2, finding a vertical line: as shown in FIG. 4, which is a schematic diagram of the vertical line finding of the present invention, by manually rotating the tap clamping tool, the large display workbench is moved left and right, so that the straight line 1 in the spiral tip groove shape of the spiral tip tap coincides with the vertical line c of the vertical rice word line, and the center O' of the top axis of the spiral tip tap is located on the horizontal line s of the rice word line.
Step 3, zeroing the center coordinates of the tap tip: as shown in FIG. 5, the center coordinate zeroing schematic diagram of the tap according to the invention is that the tap is kept motionless, the X-axis workbench is moved to make the center O of the rice word line coincide with the center O' tip of the tap, and the numerical value displayed by the X, Y display on the digital display is cleared.
And 4, finding a phase tangent line: as shown in FIG. 6, a schematic diagram of finding a tangent line is shown in the invention, a large worker display workbench is moved, so that the value is read when the center vertical line c of the rice word line is tangent to the straight line 1 in the groove shape of the spiral tip tap, at the moment, the X axis is longitudinally moved, and the display value is the diameter radius size r of the chute core diameter.
Proved by experiments, the detection precision of the diameter radius r of the chute core can reach 0.001mm, and the technical problem of inaccurate diameter radius measurement of the chute core is well solved.
Claims (4)
1. The utility model provides a high accuracy detection device of spiral tip screw tap chute core footpath, includes the workstation of installing big worker and shows the instrument, its characterized in that: the clamping tool of the spiral tip tap is also included;
the clamping tool comprises a pair of guide posts (1) which are arranged vertically symmetrically and a pair of side rods (7) which are arranged horizontally symmetrically, wherein the guide posts (1) and the end parts of the side rods (7) are assembled through screw thread pairs to form a frame structure; the two ends of the side rod (7) are provided with screw holes, and the guide post (1) passes through the screw holes and is connected with threads arranged at the two ends of the guide post (1) through nuts (6); a group of clamping block components are also included in the frame structure,
The clamping block assembly comprises two pairs of trapezoidal clamping blocks which are oppositely arranged, wherein each clamping block comprises a V-shaped groove clamping block (2) and a flat clamping block (3), and through holes which are assembled with the guide post (1) are formed in the positions, close to the end parts, of the V-shaped groove clamping block (2) and the Ping Gakuai; the spring (4) is arranged between the outer side of the through hole and the part of the guide pillar (1) close to the end part;
The inner center part of the V-shaped groove clamping block (2) is cut with a V-shaped groove (V); a shank (B) of a pointed tap is placed between the V-shaped groove (V) and the inner side of the Ping Gakuai (3), and the elastic force of the elastic yellow (4) is adjusted by adjusting the nut (6) so as to clamp the pointed tap in the V-shaped groove (V);
The V-shaped groove (V) is vertical to the horizontal surface of the bottom surface of the V-shaped groove clamping block (2), and the perpendicularity error is less than or equal to 0.01mm; meanwhile, the central axis of the spiral tip tap and the horizontal planes of the bottom surfaces of the two clamping blocks are mutually perpendicular, and then the spiral tip tap is integrally moved to a workbench of a large industrial display instrument to detect the chute core diameter of the spiral tip tap.
2. The high-precision detection device for the spiral tip tap chute core diameter according to claim 1, wherein the maximum horizontal width of the V-shaped groove (V) and the Ping Gakuai (3) is more than or equal to 1.5 times of the diameter of the handle part (B), and the thickness is more than or equal to 3 times of the diameter of the handle part (B).
3. The high-precision detection device for the spiral tip tap chute core diameter according to claim 1, wherein the opening angle of the V-shaped groove (V) is 90 degrees, and the opening depth of the V-shaped groove (V) is more than or equal to 1/2 of the diameter of the handle (B).
4. A method for detecting the diameter of a spiral bevel chute by a high-precision detection device according to claim 1,2 or 3, wherein: the method comprises the following detection steps:
Step 1, finding a center point: the four broken lines form a meter word line seen by the field of view of the large industrial display instrument; adjusting a workbench of the large industrial display instrument, moving the pointed tap and enabling the center (O') of the top axis of the pointed tap to coincide with the center (O) of the rice word line;
Step 2, finding a vertical line: by manually rotating the clamping tool, the workbench of the large industrial display instrument is moved left and right, so that a straight line (1) in a spiral tip groove shape of the spiral tip tap is overlapped with a vertical line (c) of the vertical rice word line, and meanwhile, the position of the top axis center (O') of the spiral tip tap is on a horizontal line(s) of the rice word line;
Step 3, resetting the central coordinates: keeping the tap stationary, moving a workbench of the large industrial display instrument along the X axis, enabling the center (O) of the rice word line to coincide with the center (O') of the tap, and clearing a X, Y numerical value displayed on a display of the large industrial display instrument;
And 4, finding a phase tangent line: and (3) moving the workbench of the large worker display to read the value when the center vertical line (c) of the rice word line is tangent to the straight line (1) in the spiral tap groove, and moving the X axis longitudinally at the moment, wherein the numerical value displayed by the display is the diameter radius size (r) of the chute core diameter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111495816.2A CN114111680B (en) | 2021-12-04 | 2021-12-04 | High-precision detection device and detection method for spiral tip tap chute core diameter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111495816.2A CN114111680B (en) | 2021-12-04 | 2021-12-04 | High-precision detection device and detection method for spiral tip tap chute core diameter |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114111680A CN114111680A (en) | 2022-03-01 |
CN114111680B true CN114111680B (en) | 2024-05-14 |
Family
ID=80364642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111495816.2A Active CN114111680B (en) | 2021-12-04 | 2021-12-04 | High-precision detection device and detection method for spiral tip tap chute core diameter |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114111680B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0803323A1 (en) * | 1996-04-24 | 1997-10-29 | Schaudt Maschinenbau GmbH | Method and apparatus for measuring the diameter of excentrically rotating workpieces |
CN203824481U (en) * | 2014-04-01 | 2014-09-10 | 潍柴动力股份有限公司 | Intermediate-diameter measuring instrument for odd-number fluted taps |
CN104440396A (en) * | 2014-11-28 | 2015-03-25 | 浙江机电职业技术学院 | Multifunctional mechanical measurement tapping device |
CN211205242U (en) * | 2020-02-18 | 2020-08-07 | 成都新成量工具有限公司 | Detection apparatus for circularity and tapering |
-
2021
- 2021-12-04 CN CN202111495816.2A patent/CN114111680B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0803323A1 (en) * | 1996-04-24 | 1997-10-29 | Schaudt Maschinenbau GmbH | Method and apparatus for measuring the diameter of excentrically rotating workpieces |
CN203824481U (en) * | 2014-04-01 | 2014-09-10 | 潍柴动力股份有限公司 | Intermediate-diameter measuring instrument for odd-number fluted taps |
CN104440396A (en) * | 2014-11-28 | 2015-03-25 | 浙江机电职业技术学院 | Multifunctional mechanical measurement tapping device |
CN211205242U (en) * | 2020-02-18 | 2020-08-07 | 成都新成量工具有限公司 | Detection apparatus for circularity and tapering |
Non-Patent Citations (1)
Title |
---|
奇槽丝锥中径的简便快捷测量方法;刘兴富;赵瑞革;;金属加工(冷加工);20090901(第17期);全文 * |
Also Published As
Publication number | Publication date |
---|---|
CN114111680A (en) | 2022-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101429948B1 (en) | Inspection tools for degree of vertical formed by axes hole and milling plane | |
CN102303266B (en) | Special protractor for taper hole | |
CN105403179A (en) | Ultrasonic deep hole linearity detection method and apparatus thereof | |
CN103837058A (en) | Center line caliper gauge | |
CN114111680B (en) | High-precision detection device and detection method for spiral tip tap chute core diameter | |
CN211121016U (en) | Axial dimension qualification degree testing fixture for crankshaft | |
CN205228402U (en) | Supersound deep hole straightness accuracy detection device | |
CN208847558U (en) | The device positioned for welding point impact specimen fixed length and notch | |
CN201787874U (en) | Measuring tool for detecting small diameter of external thread | |
CN203744873U (en) | Center line gauge | |
CN204373533U (en) | A kind of vernier caliper surveying the core diameter of thread | |
CN114485595B (en) | Method for accurately positioning and marking strain measuring point of bridge static load test and marking device | |
CN205537580U (en) | Pitch diameter measuring apparatu in gas thread | |
CN202057279U (en) | Check tool for checking positions of cross points of bent axial leads | |
CN109668544B (en) | Vertical rod gradient measuring instrument and measuring method | |
CN203534468U (en) | Detection device for disk groove center distance dimension | |
CN109724497B (en) | Method for online detecting radius value of inner sphere | |
CN108020142B (en) | Gear conical surface angle and diameter detection jig | |
CN202393336U (en) | Novel workpiece verticality detecting tool | |
CN212692766U (en) | Rapid detection device for measuring angles of axes of two holes of shaft yoke and convex teeth | |
CN105444723B (en) | Measuring device | |
CN107478135B (en) | Lens external diameter measurement jig | |
CN220270280U (en) | Gauge for detecting dimension precision of workpiece | |
CN220304440U (en) | Large-size lens edge thickness difference measuring device | |
CN215984254U (en) | Micrometer capable of measuring step length of shaft part |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |