CN110618040A - High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method - Google Patents
High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method Download PDFInfo
- Publication number
- CN110618040A CN110618040A CN201911042480.7A CN201911042480A CN110618040A CN 110618040 A CN110618040 A CN 110618040A CN 201911042480 A CN201911042480 A CN 201911042480A CN 110618040 A CN110618040 A CN 110618040A
- Authority
- CN
- China
- Prior art keywords
- grinding wheel
- detected
- pressing plate
- bending strength
- base
- 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.)
- Pending
Links
- 238000005452 bending Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention belongs to the technical field of cutting grinding wheel detection, and particularly relates to a high-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method. The detection device comprises a working platform, a base, a locking ring, an upper pressing plate, a lower pressing plate, a fastener and a gravity module. The detection device can quickly realize accurate measurement of the bending strength of the flexible cutter, and has simple structural design; the detection method is simple and easy to implement, the bending strength of the soft cutter can be conveniently quantified through the numerical value of the weight, and the detection is quick and accurate. After the device is used for inspection, a soft cutter product with unqualified bending strength can be detected, the phenomenon that a grinding wheel is cracked in the use process of the soft cutter is greatly reduced, and the safety of the product is improved.
Description
Technical Field
The invention belongs to the technical field of cutting grinding wheel detection, and particularly relates to a high-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method.
Background
The high-precision ultra-thin superhard material (diamond and cubic boron nitride) cutting grinding wheel (soft cutter for short) is mainly used for packaging in the semiconductor industry, and cutting and grooving materials such as ceramics, optical glass, metals and the like. The thickness of the soft cutter is generally 0.05-1.0 mm, the aperture is 6-100 mm, the outer diameter is 50-120 mm, and the rotating speed is 20000-50000 r/min.
The scribing method is characterized in that: the soft cutter has thin thickness and high cutting speed. If the strength of the grinding wheel is not high, the grinding wheel is easy to break during high-speed scribing, and great damage is caused to operating equipment and processed products, so that the bending strength detection of the grinding wheel is particularly important. However, no effective method and device for detecting the bending strength of the soft cutter exist at present.
Disclosure of Invention
In order to solve the technical problem that the bending strength of the soft cutter cannot be effectively detected at present, the invention aims to provide a high-precision bending strength detection device for an ultrathin superhard material cutting grinding wheel.
In order to achieve the technical purpose, the invention adopts the following technical scheme: ultra-thin superhard materials abrasive cut wheel bending strength detection device of high accuracy includes:
the base is provided with a step hole and is used for supporting the grinding wheel to be detected and ensuring that the grinding wheel to be detected is suspended in a semicircular wide area;
the working platform is used for fixing the base and providing a horizontal mounting surface for the base;
the locking ring is matched with the base to lock the grinding wheel to be detected;
the upper pressing plate is pressed on the upper surface of the suspended part of the grinding wheel to be detected;
the lower pressing plate is pressed on the lower surface of the suspended part of the grinding wheel to be detected;
the fastening piece is used for fastening the upper pressing plate, the grinding wheel to be detected and the lower pressing plate;
and the gravity module transmits pressure to the grinding wheel to be detected through the upper pressing plate and the lower pressing plate.
Preferably, the inner diameter of the locking ring is consistent with the diameter of the small hole of the stepped hole of the base.
As a preferred technical scheme, the specifications of the upper pressure plate and the lower pressure plate are consistent, and the lower pressure plate is in clearance fit with a small hole of a step hole of the base.
As a preferred technical scheme, the centers of the upper pressure plate and the lower pressure plate are respectively provided with a connecting hole with the same aperture as the grinding wheel to be detected.
According to the preferable technical scheme, the fastening piece comprises a locking bolt and a locking nut, and the locking bolt sequentially penetrates through the upper pressing plate, the grinding wheel to be detected and the lower pressing plate.
As the preferred technical scheme, a hanging rod with a hole is welded at the bottom end of the locking bolt.
As a preferred technical scheme, the gravity module is a weight, and the weight is hung on the hanging rod.
The invention also provides a method for detecting the bending strength of the high-precision ultrathin superhard material cutting grinding wheel by adopting the device, which comprises the following steps:
the method comprises the following steps that firstly, the surface of a working platform is cleaned, a base is arranged on the working platform, a lower pressing plate is firstly placed into a small hole of a step hole of the base, then a grinding wheel to be detected is arranged on a step of the step hole of the base, and the grinding wheel to be detected is locked through a locking ring, so that the grinding wheel to be detected is enabled to be suspended in a half ring width area;
secondly, placing an upper pressing plate on the upper surface of the suspended part of the grinding wheel to be detected, after a locking bolt sequentially penetrates through the upper pressing plate, the grinding wheel to be detected and a lower pressing plate, tightly locking the upper pressing plate, the grinding wheel to be detected and the lower pressing plate by using a locking nut, and pressing the upper pressing plate and the lower pressing plate on the upper surface and the lower surface of the suspended part of the grinding wheel to be detected respectively;
continuously increasing the weight of a weight on a hanging rod at the bottom of the locking bolt to gradually increase the pressure borne by the surface of the grinding wheel to be detected until the grinding wheel to be detected is broken; setting the total weight of the weight when the grinding wheel to be detected is broken as W1The sectional area of the stressed part of the grinding wheel to be detected is S; the bending strength F of the grinding wheel to be detected1Comprises the following steps: f1＝W1/S。
Preferably, the method further comprises the following steps:
step four, setting the total weight of the weight born by the standard grinding wheel with the same specification as the grinding wheel to be detected when the standard grinding wheel is broken as W2Total weight W of weight borne by grinding wheel to be detected when broken1≥W2Judging the grinding wheel to be detected to be a qualified product; total weight W of weight borne if the grinding wheel to be detected is broken1＜ W2Then, the grinding wheel to be detected is judged to beAnd (5) unqualified products are obtained.
Due to the adoption of the technical scheme, the invention has at least the following beneficial effects:
(1) the bending strength of the soft cutter (the grinding wheel to be detected) can be rapidly and accurately measured by the detection device, and the detection device is simple in structural design; after the device is used for inspection, a soft cutter product with unqualified bending strength can be detected, the phenomenon that a grinding wheel is cracked in the use process of the soft cutter is greatly reduced, and the safety of the product is improved.
(2) The detection method is simple and easy to implement, the bending strength of the soft cutter can be conveniently quantified through the numerical value of the weight, and the detection is quick and accurate.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic view of an assembled structure of a detecting unit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a work platform according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base in an embodiment of the invention.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
Examples
As shown in fig. 1, the bending strength detection device for the high-precision ultrathin superhard material cutting grinding wheel comprises a working platform 1, a base 2, a locking ring 3, an upper pressure plate 4, a lower pressure plate 5, a fastener 7 and a gravity module 8, wherein the base 2, the locking ring 3, the fastener and the working platform are all steel pieces, and the pressure plate is an aluminum piece; wherein:
the base 2 is provided with a stepped hole 21 (refer to fig. 3) for supporting the grinding wheel 6 to be detected and ensuring that the grinding wheel 6 to be detected has a semicircular wide area and is suspended, and the diameter of a large hole 211 of the stepped hole is consistent with the outer diameter of the grinding wheel 6 to be detected and is in clearance fit with the outer diameter of the grinding wheel 6 to be detected; the base is of a single design and can only meet the use requirement of a soft cutter (a grinding wheel to be detected) with a certain external diameter specification;
the working platform 1 is used for fixing the base 2, in the embodiment, the base 2 is installed in a groove 11 (refer to fig. 2) of the working platform 1, the working platform 1 mainly provides a horizontal installation surface for the base 2, and meanwhile, a through hole 12 is formed in the center of the groove of the working platform 1 so as to leave a hanging space for the gravity module 8;
a locking ring 3 (which can adopt a flange plate) is matched with the base 2 to lock the grinding wheel to be detected; the inner diameter of the locking ring 3 is consistent with the diameter of the small hole 212 of the stepped hole 21 of the base 2, and the outer diameter of the locking ring 3 is consistent with the outer diameter of the grinding wheel 6 to be detected;
the upper pressing plate 4 is pressed on the upper surface of the suspended part of the grinding wheel 6 to be detected;
the lower pressing plate 5 is pressed on the lower surface of the suspended part of the grinding wheel 6 to be detected; the specifications of the upper pressure plate 4 and the lower pressure plate 5 are consistent, and the lower pressure plate 5 is in clearance fit with the small hole 212 of the step hole 21 of the base 2; the centers of the upper pressure plate 4 and the lower pressure plate 5 are respectively provided with a connecting hole with the same aperture as that of the grinding wheel 6 to be detected;
the fastening piece 7 is used for fastening the upper pressing plate 4, the grinding wheel 6 to be detected and the lower pressing plate 5; in this embodiment, the fastening member 7 includes a locking bolt 71 and a locking nut 72, and the locking bolt 71 passes through the upper platen 4, the grinding wheel 6 to be detected and the lower platen 5 in sequence, and then is locked by the locking nut 72; the bottom end of the locking bolt 71 is welded with a hanging rod 9 with a hole, so that the gravity module 8 can be conveniently hung;
and the gravity module 8 transmits pressure to the grinding wheel 6 to be detected through the upper pressing plate 4 and the lower pressing plate 5. For convenient use, the gravity module 8 can adopt a standard part weight, and the weight can be directly hung on the hanging rod 9.
Referring to fig. 1 to 3, the method for detecting the bending strength of the high-precision ultrathin superhard material cutting grinding wheel by using the device comprises the following steps:
firstly, wiping the surface of a working platform 1, placing a base 2 on the working platform 1, placing a lower pressing plate 5 into a small hole 212 of a step hole 21 of the base 2, then placing a grinding wheel 6 to be detected on a step 213 of the step hole 21 of the base 2, and locking the grinding wheel 6 to be detected through a locking ring 3, so as to ensure that the grinding wheel 6 to be detected has a half ring width area and is suspended;
secondly, placing the upper pressing plate 4 on the upper surface of the suspended part of the grinding wheel 6 to be detected, fastening and locking the upper pressing plate 4, the grinding wheel 6 to be detected and the lower pressing plate 5 by using a locking nut 72 after a locking bolt 71 sequentially penetrates through the upper pressing plate 4, the grinding wheel 6 to be detected and the lower pressing plate 5, and pressing the upper pressing plate 4 and the lower pressing plate 5 on the upper surface and the lower surface of the suspended part of the grinding wheel 6 to be detected respectively;
step three, continuously increasing the weight of the weight on the hanging rod 9 at the bottom of the locking bolt 71, so that the pressure borne by the surface of the grinding wheel 6 to be detected is gradually increased until the grinding wheel to be detected is broken; setting the total weight of the weight when the grinding wheel to be detected is broken as W1The sectional area of the stressed part of the grinding wheel to be detected is S; the bending strength F of the grinding wheel to be detected1Comprises the following steps: f1＝W1/S。
Step four, measuring the total weight W of the weight born by the standard grinding wheel with the same specification as the grinding wheel to be detected when the standard grinding wheel is broken by adopting the detection method2(ii) a Total weight W of weight borne if the grinding wheel to be detected is broken1≥W2Judging the grinding wheel to be detected to be a qualified product; total weight W of weight borne if the grinding wheel to be detected is broken1＜W2And judging that the grinding wheel to be detected is an unqualified product.
And step five, removing the weights, removing the locking ring 3, loosening the locking nut 72, and removing the pressing plate to take out the grinding wheel 6 to be detected.
By the detection method and the detection device, the bending strength of the soft cutter can be accurately measured, the device is simple in structure, the bending strength of the soft cutter can be conveniently quantified through the numerical value of the weight, the soft cutter product with unqualified bending strength can be detected, the phenomenon that the grinding wheel is cracked in the use process of the soft cutter is greatly reduced, and the safety of the product is improved.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention shall fall within the protection scope of the invention.
Claims (9)
1. Ultra-thin superhard materials abrasive cut wheel bending strength detection device of high accuracy, its characterized in that includes:
the base is provided with a step hole and is used for supporting the grinding wheel to be detected and ensuring that the grinding wheel to be detected is suspended in a semicircular wide area;
the working platform is used for fixing the base and providing a horizontal mounting surface for the base;
the locking ring is matched with the base to lock the grinding wheel to be detected;
the upper pressing plate is pressed on the upper surface of the suspended part of the grinding wheel to be detected;
the lower pressing plate is pressed on the lower surface of the suspended part of the grinding wheel to be detected;
the fastening piece is used for fastening the upper pressing plate, the grinding wheel to be detected and the lower pressing plate;
and the gravity module transmits pressure to the grinding wheel to be detected through the upper pressing plate and the lower pressing plate.
2. The apparatus for testing bending strength of a high precision ultra-thin superhard material cutting wheel according to claim 1, wherein: the inner diameter of the locking ring is consistent with the aperture of the small hole of the step hole of the base.
3. The apparatus for testing bending strength of a high precision ultra-thin superhard material cutting wheel according to claim 1, wherein: the specifications of the upper pressure plate and the lower pressure plate are consistent, and the lower pressure plate is in clearance fit with the small hole of the step hole of the base.
4. The apparatus for testing bending strength of a high precision ultra-thin superhard material cutting wheel according to claim 3, wherein: and the centers of the upper pressing plate and the lower pressing plate are respectively provided with a connecting hole with the same aperture as the grinding wheel to be detected.
5. The apparatus for testing bending strength of the ultra-thin superhard material cutting wheel with high precision as claimed in claim 4, wherein: the fastening piece comprises a locking bolt and a locking nut, and the locking bolt sequentially penetrates through the upper pressing plate, the grinding wheel to be detected and the lower pressing plate.
6. The apparatus for testing bending strength of a high precision ultra-thin superhard material cutting wheel according to claim 5, wherein: and a hanging rod with a hole is welded at the bottom end of the locking bolt.
7. The apparatus for testing bending strength of a high precision ultra-thin superhard material cutting wheel according to claim 6, wherein: the gravity module is a weight, and the weight is connected to the hanging rod in a hanging mode.
8. The method for detecting the bending strength of the high-precision ultrathin superhard material cutting grinding wheel is characterized by comprising the following steps of:
the method comprises the following steps that firstly, the surface of a working platform is cleaned, a base is arranged on the working platform, a lower pressing plate is firstly placed into a small hole of a step hole of the base, then a grinding wheel to be detected is arranged on a step of the step hole of the base, and the grinding wheel to be detected is locked through a locking ring, so that the grinding wheel to be detected is enabled to be suspended in a half ring width area;
secondly, placing an upper pressing plate on the upper surface of the suspended part of the grinding wheel to be detected, after a locking bolt sequentially penetrates through the upper pressing plate, the grinding wheel to be detected and a lower pressing plate, tightly locking the upper pressing plate, the grinding wheel to be detected and the lower pressing plate by using a locking nut, and pressing the upper pressing plate and the lower pressing plate on the upper surface and the lower surface of the suspended part of the grinding wheel to be detected respectively;
continuously increasing the weight of a weight on a hanging rod at the bottom of the locking bolt to gradually increase the pressure borne by the surface of the grinding wheel to be detected until the grinding wheel to be detected is broken; setting the total weight of the weight when the grinding wheel to be detected is broken as W1The sectional area of the stressed part of the grinding wheel to be detected is S; the bending strength F of the grinding wheel to be detected1Comprises the following steps: f1＝W1/S。
9. The method for testing the bending strength of the high-precision ultra-thin superhard material cutting wheel according to claim 8, further comprising the following steps:
step four, setting the total weight of the weight born by the standard grinding wheel with the same specification as the grinding wheel to be detected when the standard grinding wheel is broken as W2Total weight W of weight borne by grinding wheel to be detected when broken1≥W2Judging the grinding wheel to be detected to be a qualified product; total weight W of weight borne if the grinding wheel to be detected is broken1＜W2And judging that the grinding wheel to be detected is an unqualified product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911042480.7A CN110618040A (en) | 2019-10-30 | 2019-10-30 | High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911042480.7A CN110618040A (en) | 2019-10-30 | 2019-10-30 | High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110618040A true CN110618040A (en) | 2019-12-27 |
Family
ID=68927017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911042480.7A Pending CN110618040A (en) | 2019-10-30 | 2019-10-30 | High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110618040A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258454A (en) * | 2005-03-15 | 2006-09-28 | Toray Ind Inc | Bending fatigue test method of lightweight sandwich panel |
| CN201917491U (en) * | 2010-12-23 | 2011-08-03 | 郑州磨料磨具磨削研究所 | Testing hook for binding force of abrasive layer and base of ultrathin abrasive cutting wheel |
| CN104949889A (en) * | 2015-06-12 | 2015-09-30 | 郑州磨料磨具磨削研究所有限公司 | Whole flexural testing method and device of ultrathin grinding wheel |
| CN108344642A (en) * | 2018-02-02 | 2018-07-31 | 中国工程物理研究院机械制造工艺研究所 | It is a kind of based on gravitational load 3 points of curved creep test devices and test method |
| CN110186779A (en) * | 2019-06-28 | 2019-08-30 | 河北工业大学 | A kind of beded rock mass cantilever bending fracture creep test device and test method |
| CN211085966U (en) * | 2019-10-30 | 2020-07-24 | 南京三超新材料股份有限公司 | High-precision bending strength detection device for ultrathin superhard material cutting grinding wheel |
-
2019
- 2019-10-30 CN CN201911042480.7A patent/CN110618040A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258454A (en) * | 2005-03-15 | 2006-09-28 | Toray Ind Inc | Bending fatigue test method of lightweight sandwich panel |
| CN201917491U (en) * | 2010-12-23 | 2011-08-03 | 郑州磨料磨具磨削研究所 | Testing hook for binding force of abrasive layer and base of ultrathin abrasive cutting wheel |
| CN104949889A (en) * | 2015-06-12 | 2015-09-30 | 郑州磨料磨具磨削研究所有限公司 | Whole flexural testing method and device of ultrathin grinding wheel |
| CN108344642A (en) * | 2018-02-02 | 2018-07-31 | 中国工程物理研究院机械制造工艺研究所 | It is a kind of based on gravitational load 3 points of curved creep test devices and test method |
| CN110186779A (en) * | 2019-06-28 | 2019-08-30 | 河北工业大学 | A kind of beded rock mass cantilever bending fracture creep test device and test method |
| CN211085966U (en) * | 2019-10-30 | 2020-07-24 | 南京三超新材料股份有限公司 | High-precision bending strength detection device for ultrathin superhard material cutting grinding wheel |
Non-Patent Citations (1)
| Title |
|---|
| ：中国硅酸盐学会陶瓷分会建筑卫生陶瓷专业委员会: "现代建筑卫生陶瓷工程师手册", vol. 1998, 31 August 1998, 中国建材工业出版社, pages: 118 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211085966U (en) | High-precision bending strength detection device for ultrathin superhard material cutting grinding wheel | |
| CN110618040A (en) | High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method | |
| CN209894095U (en) | Quick detection device of axle type part external diameter | |
| CN102853750A (en) | Detecting tool for fixed point of inner hole arc chamfer of bevel gear | |
| US20190285394A1 (en) | Gage for detecting a diameter of a bolt hole back socket | |
| CN215572777U (en) | Aircraft skin curved surface normal direction hole position degree detects frock | |
| CN112985344B (en) | Internal thread coaxiality detection device | |
| CN210689424U (en) | Counter sink hole measuring device | |
| Zhang et al. | Monitoring for damage in two-dimensional pre-stress scratching of SiC ceramics | |
| CN107044815A (en) | Engine bearing lid seam size, position degree special gauge and detection method | |
| Lim | The impact of wafer back surface finish on chip strength | |
| CN214276774U (en) | Semi-axis flange root circular arc degree of depth examines utensil | |
| CN209986243U (en) | Lathe tool turret base plate calibrating device | |
| CN219531978U (en) | Automobile trunk lining detection tool | |
| CN211262037U (en) | Step face threaded hole detection gauge | |
| CN216926402U (en) | Stacking test device for cylindrical packaging piece | |
| CN211425246U (en) | Glass steel locomotive work progress examines utensil | |
| CN213067343U (en) | Diversion sheave inspection frock | |
| CN211147551U (en) | Gauge for detecting angle size of steering knuckle | |
| CN212721274U (en) | Special gauge for detecting flatness of belt groove | |
| CN207610639U (en) | A kind of endoporus bottom back chipping validation checking tool | |
| CN218662349U (en) | Auxiliary tool for laying inserts in external ribs of main undercarriage | |
| CN211347208U (en) | Pressure detection mechanism | |
| CN214276778U (en) | Angle gauge | |
| CN217005659U (en) | Mesopore gyration type part detection device |
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 |