CN108662962B - Go-no-go gauge for rapidly checking dovetail size of brake pad and manufacturing method thereof - Google Patents
Go-no-go gauge for rapidly checking dovetail size of brake pad and manufacturing method thereof Download PDFInfo
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- CN108662962B CN108662962B CN201810829007.2A CN201810829007A CN108662962B CN 108662962 B CN108662962 B CN 108662962B CN 201810829007 A CN201810829007 A CN 201810829007A CN 108662962 B CN108662962 B CN 108662962B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000010146 3D printing Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012937 correction Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000005259 measurement Methods 0.000 abstract description 8
- 241000357293 Leptobrama muelleri Species 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical group [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/38—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable
- G01B3/42—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable of limit-gauge type, i.e. "go/no-go"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Braking Arrangements (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The application provides a go-no-go gauge for rapidly checking the dovetail size of a brake pad and a manufacturing method thereof, wherein the go-no-go gauge comprises a body, a dovetail through end groove and a dovetail end groove; the dovetail through end groove is arranged at one side of the body; the dovetail end stop groove is arranged on the other side of the body; the dovetail through end grooves and the dovetail end stopping grooves are symmetrically arranged on two sides of the body, and are trapezoidal grooves concave inwards; the go-no-go gauge provided by the application can greatly improve the detection efficiency, reduce the measurement error and greatly reduce the production control cost and the detection cost of the universal dovetail steel back; and this lead to no-go gage easily carries, the wearability is higher, and the operating personnel of being convenient for uses, can guarantee the dimensional accuracy after the longer use simultaneously, effectively guarantees the long-time detection quality of product.
Description
Technical Field
The application belongs to the technical field of inspection of dovetail size of brake pads, and particularly relates to a go-no-go gauge for rapidly inspecting dovetail size of brake pads and a manufacturing method thereof.
Background
The dovetail size measurement of the dovetail general type powder metallurgy brake pad for the motor train unit vehicles with the current speed per hour of 160-350 km or more is relatively complicated; the measuring tool comprises a dovetail width, a dovetail height and a dovetail angle; the number of measurement items is large, and the angle is difficult to accurately measure; and after the average value is obtained through multiple measurements, whether the size of the dovetail meets the requirements can be judged, the working efficiency is low, and the qualification condition of the dovetail cannot be intuitively reflected.
The existing measuring tool is adopted to measure the dovetail of the brake pad, the measuring cost is high, the efficiency is low, the dovetail angle is high in measuring difficulty, measuring errors are easy to cause by different operating methods of different operators, and an effective checking tool is absent on site, so that the dovetail of the brake pad is difficult to ensure that the requirements of users are met.
Based on the technical problems existing in the dovetail size measurement of the gold brake pads, no relevant solution exists yet; there is therefore an urgent need to seek an effective solution to the above problems.
Disclosure of Invention
The application aims to overcome the defects in the prior art, provides a go-no-go gauge for rapidly checking the dovetail size of a brake pad and a manufacturing method thereof, and aims to solve the problems of low dovetail size measurement efficiency and poor accuracy of the existing gold brake pad.
The application provides a go-no-go gauge for rapidly checking the dovetail size of a brake pad, which comprises a body, a dovetail through end groove and a dovetail stop end groove, wherein the body is provided with a groove; the dovetail through end groove is arranged at one side of the body; the dovetail end stop groove is arranged on the other side of the body; the dovetail through end groove and the dovetail end groove are symmetrically arranged on two sides of the body, and the dovetail through end groove and the dovetail end groove are inwards concave trapezoid grooves.
Further, the body includes a first side end, a second side end, a third side end, and a fourth side end; the first side end part and the second side end part are positioned on one side of the body; the third side end part and the fourth side end part are positioned at the other side of the body; the dovetail end-stop groove is arranged between the first side end part and the second side end part; the dovetail end slot is disposed between the third side end and the fourth side end.
Further, a bevel is provided on the third side end and/or the fourth side end.
Further, the included angle between the inclined plane and the central line of the body is 45 degrees; the linear distance d between the end point of the inclined plane and the end of the body is 15mm.
Further, the depth c of the dovetail through end groove and the dovetail end groove is 7mm; the width i of the body is 30mm; the height h of the body is 30mm.
Further, the width a of the bottom of the dovetail end groove is 64.516mm to 64.5mm; the included angle f between two sides of the bottom of the dovetail end groove is 52.6 degrees to 52.5 degrees.
Further, the width b of the bottom of the dovetail end groove is 64.966mm to 64.95mm; the included angle g between two sides of the bottom of the dovetail through end groove is 53-52.9 degrees.
The application also provides a manufacturing method of the go-no-go gauge for rapidly checking the dovetail size of the brake pad, which comprises the following steps:
s1: setting the size of a go-no-go gauge and forming a drawing;
s2: selecting materials for manufacturing the go-no-go gauge; preparing a material as powder;
s3: melting and 3D printing in a laser selective area, and performing near-net forming to obtain a preliminary go-no-go gauge blank;
s4: and grinding the preliminary go-no-go gauge blank to ensure that the preliminary go-no-go gauge blank meets the drawing dimensional accuracy requirement and the roughness requirement.
The go-no-go gauge provided by the application provides an effective gauge for the production of the universal dovetail steel back, after the go-no-go gauge is used, the detection qualification rate is improved from 70% to 100%, the detection efficiency is greatly improved, the production control cost and the detection cost of the universal dovetail steel back are greatly reduced, and 100% of assembled dovetail universal brake discs can ensure that the requirements of users on dovetail interfaces are met; about 600 sheets can be inspected per hour on average, the working efficiency is improved by more than 6 times, and the phenomenon that partial disqualification and undetected phenomenon caused by measurement errors due to improper original methods is avoided; and adopt wear-resisting alloy processing integral type to lead to no-go gage, simple and easy portable just improves the wearability, and the operating personnel of being convenient for uses, guarantees the dimensional accuracy after the longer use simultaneously, and product quality obtains further assurance.
Drawings
The application will be described in further detail with reference to the drawings and the detailed description.
The application will be further described with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of a go-no-go gauge for rapidly checking the dovetail size of a brake pad according to the present application;
FIG. 2 is a front view of a go-no-go gauge for rapidly checking the dovetail size of a brake pad according to the present application;
FIG. 3 is a drawing of dimension labels of the go-no-go gauge for rapidly checking the dovetail dimension of the brake pad according to the present application;
fig. 4 is a cross-sectional view taken along A-A in fig. 3.
In the figure: 1. a first side end; 2. a second side end; 3. a third side end; 4. a fourth side end; 5. dovetail end-stop slots; 6. dovetail through end slots; 7. a first inclined surface; 8. a second inclined surface; 9. a body.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 4, the present application provides a go-no-go gauge for rapidly checking dovetail size of brake pad, comprising a body 9, a dovetail stop slot 5 and a dovetail go-end slot 6; the dovetail end-stopping groove 5 is arranged on one side of the body 9; the dovetail through end groove 6 is arranged on the other side of the body 9; the dovetail end stopping groove 5 and the dovetail end passing groove 6 are symmetrically arranged on two sides of the body 9, and the dovetail end stopping groove 5 and the dovetail end passing groove 6 are trapezoidal grooves which are concave inwards towards the body 9; the dovetail end slot 5 and the dovetail end slot 6 correspond to the standard passing sizes of the dovetail of the brake pad respectively, so that the brake pad dovetail can be rapidly detected by adopting a pass-stop gauge with a given dovetail size, and the detection efficiency and the detection precision of the brake pad dovetail are improved.
Preferably, in combination with the above, as shown in fig. 1 to 4, in this embodiment, the body 9 includes a first side end 1, a second side end 2, a third side end 3, and a fourth side end 4; the first side end part 1 and the second side end part 2 are positioned on one side of the body 9; the third side end 3 and the fourth side end 4 are positioned on the other side of the body 9; and a dovetail end-stop groove 5 is provided between the first side end portion 1 and the second side end portion 2; the dovetail through end groove 6 is arranged between the third side end part 3 and the fourth side end part 4; specifically, the dovetail end slot 5 is arranged on the body 9 through a concave manner, so that the two sides of the dovetail end slot 5 and the body 9 form a first side end part 1 and a second side end part 2; similarly, the dovetail end slot 6 is provided on the body 9 by a recess such that the dovetail end slot 6 and the body 9 form the third side end 3 and the fourth side end 4, which is relatively compact, small, and easy to detect.
Preferably, in combination with the above-mentioned solution, as shown in fig. 1 to 4, in this embodiment, a slope is provided on the third side end 3 and/or the fourth side end 4 to distinguish the through end from the end stop; specifically, the third side end 3 is provided with a first inclined surface 7; the fourth side end 4 is provided with a second inclined surface 8; the included angles between the first inclined plane 7 and the central line of the body 9 and the second inclined plane 8 are 45 degrees; and the end points of the first inclined surface 7 and the second inclined surface 8 are at a linear distance d of 15mm from the end of the body 9.
Preferably, in combination with the above, as shown in fig. 1 to 4, in this embodiment, the depth c of the dovetail end slot 5 and the dovetail through-end slot 6 is 7mm; the width i of the body 9 is 30mm; the height h of the body 9 is 30mm.
Preferably, in combination with the above, as shown in fig. 1 to 4, in this embodiment, the width a of the bottom of the dovetail slot 5 is 64.516mm to 64.5mm; the included angle f between the two sides of the bottom of the dovetail end groove 5 is 52.6 degrees to 52.5 degrees.
Preferably, in combination with the above, as shown in fig. 1 to 4, in this embodiment, the width b of the bottom of the dovetail slot 6 is 64.966mm to 64.95mm; the included angle g between two sides of the bottom of the dovetail through end groove 6 is 53 degrees to 52.9 degrees.
By adopting the scheme, the detection function of the go gauge and the no-go gauge is realized by setting the size and accurately processing the width and the angle of the go gauge; according to the through-and-no-go gauge structure, the through-and-no-go gauge is held by a hand to enable the dovetail through-end groove of the through-and-no-go gauge to be in contact with the dovetail of the brake pad and try to pass through the dovetail, whether the upper limit size of the dovetail exceeds the standard (the width is 65mm, the angle is 53 degrees, if the upper limit size exceeds the standard, the through-and-no-go gauge is not passed), meanwhile, the through-and-no-go gauge is turned to enable the dovetail through-and-no-go gauge to be in contact with the dovetail and try to pass through, whether the lower limit size of the dovetail is qualified (the width is 64.5mm, the angle is 52.5 degrees, if the through-going gauge can pass through, the dovetail is unqualified, and the dovetail cannot be stopped) can be judged rapidly; the dovetail end-stop groove provided by the application is suitable for final dovetail size inspection before delivery of various dovetail general-purpose brake shoes and production inspection of dovetail general-purpose steel backing components before assembly of the dovetail general-purpose brake shoes.
Correspondingly, in combination with the scheme, the application also provides a manufacturing method of the go-no-go gauge for rapidly checking the dovetail size of the brake pad, which comprises the following steps:
s1: setting the size of a go-no-go gauge and forming a drawing;
s2: selecting materials for manufacturing the go-no-go gauge; preparing a material as powder; tungsten cobalt alloy YG8 or other abrasion-resistant high-hardness powder is adopted;
s3: melting and 3D printing in a laser selective area, and performing near-net forming to obtain a preliminary go-no-go gauge blank;
s4: and grinding the preliminary go-no-go gauge blank to ensure that the preliminary go-no-go gauge blank meets the drawing dimensional accuracy requirement and the roughness requirement.
Preferably, in combination with the above solution, in this embodiment, the material for manufacturing the go-no-go gauge may be one of GCr15 (high carbon chromium bearing steel), YG8 (tungsten cobalt alloy), cr12MoV (cold work die steel) or 3Cr13 (stainless steel); wherein the granularity of the powder is 15-63 mu m; the powder repose angle is less than 45 degrees.
Preferably, in combination with the above solution, in this embodiment, the step S3 includes the following steps:
s301: establishing a three-dimensional model of the go-no-go gauge by utilizing three-dimensional software; the three-dimensional model is provided with a finish machining allowance;
s302: performing format conversion on the three-dimensional model of the go-no-go gauge in three-dimensional software to generate an STL file;
s303: creating a machine platform model by using Magic software, and importing an STL file of the three-dimensional model;
s304: directionally placing the three-dimensional model in a proper position in a substrate model in Magic software for correction and repair;
s305: slicing and layering the three-dimensional model, planning a laser scanning path, filling each slicing layer, and outputting an SLI format ply file;
s306: importing the SLI format ply file containing filling information into 3D printing equipment;
s307: setting 3D printing additive manufacturing parameters; the laser power is 200-400W, and the scanning speed is 800-1200 mm/s;
s308: placing the powder material into a powder storage bin;
s309: manufacturing the go-no-go gauge on the substrate according to the formulated 3D printing additive manufacturing parameters;
s310: and cutting and separating the go-no-go gauge from the substrate.
The through-and-no-go gauge provided by the application can simply and rapidly measure the size of the dovetail, and can rapidly judge whether the upper limit size of the dovetail exceeds the standard (the width is 65mm, the angle is 53 degrees, and the dovetail is not passed if the upper limit size exceeds the standard) by contacting the through-end of the through-and-no-go gauge (namely the through-end slot of the dovetail) with the dovetail and penetrating the dovetail; meanwhile, through the contact of the through-and-stop gauge end (namely the dovetail end groove) and the dovetail and the trial pass, whether the lower limit size of the dovetail is qualified (the width is 64.5mm, the angle is 52.5 degrees) can be rapidly judged, and if the dovetail can pass, the dovetail is unqualified, namely the dovetail cannot be stopped.
The go-no-go gauge provided by the application provides an effective gauge for the production of the universal dovetail steel back, after the go-no-go gauge is used, the detection qualification rate is improved from 70% to 100%, the detection efficiency is greatly improved, the production control cost and the detection cost of the universal dovetail steel back are greatly reduced, and 100% of assembled dovetail universal brake discs can ensure that the requirements of users on dovetail interfaces are met; about 600 sheets can be inspected per hour on average, the working efficiency is improved by more than 6 times, and the phenomenon that partial disqualification and undetected phenomenon caused by measurement errors due to improper original methods is avoided; and adopt wear-resisting alloy processing integral type to lead to no-go gage, simple and easy portable just improves the wearability, and the operating personnel of being convenient for uses, guarantees the dimensional accuracy after the longer use simultaneously, and product quality obtains further assurance.
The above description is only a preferred embodiment of the present application, and is not intended to limit the present application in any way. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the disclosed technology. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technology of the present application fall within the protection scope of the present application.
Claims (4)
1. A go-no-go gauge for rapidly checking the dovetail size of a brake pad is characterized by comprising a body, a dovetail through end groove and a dovetail stop end groove; the dovetail through end groove is arranged on one side of the body; the dovetail end stop groove is arranged on the other side of the body;
the dovetail through end grooves and the dovetail end stopping grooves are symmetrically arranged on two sides of the body, and are trapezoidal grooves concave inwards of the body;
the body comprises a first side end part, a second side end part, a third side end part and a fourth side end part; the first side end and the second side end are positioned on one side of the body; the third side end part and the fourth side end part are positioned on the other side of the body; and the dovetail end slot is disposed between the first side end and the second side end; the dovetail end slot is arranged between the third side end and the fourth side end; an inclined plane is arranged on the third side end part and/or the fourth side end part; the included angle between the inclined plane and the central line of the body is 45 degrees; the linear distance d between the end point of the inclined plane and the end part of the body is 15mm; the depth c of the dovetail through end groove and the dovetail end groove is 7mm; the width i of the body is 30mm; the height h of the body is 30mm; the bottom width a of the dovetail end groove is 64.516mm to 64.5mm; the included angle f between two sides of the bottom of the dovetail end-stopping groove is 52.6-52.5 degrees; the bottom width b of the dovetail end groove is 64.966mm to 64.95mm; the included angle g between two sides of the bottom of the dovetail through end groove is 53-52.9 degrees.
2. A method of manufacturing a go-no-go gauge for rapidly inspecting dovetail dimensions of a brake shoe according to claim 1, comprising the steps of:
s1: setting the size of a go-no-go gauge and forming a drawing;
s2: selecting materials for manufacturing the go-no-go gauge; preparing a material as powder;
s3: melting and 3D printing in a laser selective area, and performing near-net forming to obtain a preliminary go-no-go gauge blank;
s4: and grinding the preliminary go-no-go gauge blank to ensure that the preliminary go-no-go gauge blank meets the drawing dimensional accuracy requirement and the roughness requirement.
3. The method for manufacturing a go-no-go gauge for rapidly inspecting a dovetail size of a brake pad according to claim 2, wherein the material is one of GCr15, YG8, cr12MoV or 3Cr 13; the granularity of the powder is 15-63 mu m; the powder repose angle is less than 45 degrees.
4. The method for manufacturing the go-no-go gauge for rapidly checking the dovetail size of the brake pad according to claim 2, wherein the step S3 comprises the steps of:
s301: establishing a three-dimensional model of the go-no-go gauge by utilizing three-dimensional software; the three-dimensional model is provided with a finish machining allowance;
s302: performing format conversion on the three-dimensional model of the go-no-go gauge in three-dimensional software to generate an STL file;
s303: creating a machine platform model by using Magic software, and importing an STL file of the three-dimensional model;
s304: directionally placing the three-dimensional model at a proper position in a substrate model in Magic software for correction and repair;
s305: slicing and layering the three-dimensional model, planning a laser scanning path, filling each slicing layer, and outputting an SLI format ply file;
s306: importing the SLI format ply file containing filling information into 3D printing equipment;
s307: setting 3D printing additive manufacturing parameters; the laser power is 200-400W, and the scanning speed is 800-1200 mm/s;
s308: placing the powder material into a powder storage bin;
s309: manufacturing the go-no-go gauge on the substrate according to the formulated 3D printing additive manufacturing parameters;
s310: and cutting and separating the go-no-go gauge from the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829007.2A CN108662962B (en) | 2018-07-25 | 2018-07-25 | Go-no-go gauge for rapidly checking dovetail size of brake pad and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829007.2A CN108662962B (en) | 2018-07-25 | 2018-07-25 | Go-no-go gauge for rapidly checking dovetail size of brake pad and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108662962A CN108662962A (en) | 2018-10-16 |
| CN108662962B true CN108662962B (en) | 2023-11-28 |
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| CN201810829007.2A Active CN108662962B (en) | 2018-07-25 | 2018-07-25 | Go-no-go gauge for rapidly checking dovetail size of brake pad and manufacturing method thereof |
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| CN109373864A (en) * | 2018-11-20 | 2019-02-22 | 中国航发贵州黎阳航空动力有限公司 | A kind of gap detection device and detection method of complex profile small space |
| CN110090961B (en) * | 2019-04-29 | 2022-04-15 | 石家庄钢铁有限责任公司 | Processing technology of bearing steel product |
| CN113566742A (en) * | 2021-07-26 | 2021-10-29 | 宁波江丰芯创科技有限公司 | Detection method for inner groove angle and bottom R angle of dovetail groove |
| CN113970281A (en) * | 2021-11-29 | 2022-01-25 | 天津市百利纽泰克电气科技有限公司 | Special-shaped iron core inspection tool, inspection method and forming method |
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