CN118046052B - Positioning method for turbine blade surface machining groove - Google Patents
Positioning method for turbine blade surface machining groove Download PDFInfo
- Publication number
- CN118046052B CN118046052B CN202410453634.6A CN202410453634A CN118046052B CN 118046052 B CN118046052 B CN 118046052B CN 202410453634 A CN202410453634 A CN 202410453634A CN 118046052 B CN118046052 B CN 118046052B
- Authority
- CN
- China
- Prior art keywords
- dial indicator
- electrode
- positioning
- blade
- clamping block
- 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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003754 machining Methods 0.000 title claims description 18
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention relates to the technical field of blade processing, and provides a positioning method of a blade surface processing groove, which comprises the following steps: s1, preparing work, comprising the following steps: a. marking a positioning line on the blade body according to the position requirement of the groove to be processed in the connecting line direction of the front edge and the rear edge; b. clamping the blade through a fixing clamp, so that the axis of the wire passing hole is parallel to the electrode; c. the contact pin of the dial indicator or the dial indicator is propped against one side of the electrode, the dial indicator or the dial indicator is fixed, and the reading is recorded; s2, positioning operation: the electrode moves upwards, the blade is moved, the positioning line on the blade body is propped against the contact pin of the dial indicator or the dial indicator, and the reading is consistent with the reading recorded in the step S1. According to the invention, the reading of the blade body against the dial indicator or the dial indicator contact pin is equal to the reading of the electrode against the dial indicator or the dial indicator contact pin, so that the position of the groove to be processed in the direction of the connection line of the basin side and the back side is determined, the operation is simple, the workload is small, the efficiency is higher, and the positioning is more accurate.
Description
Technical Field
The invention relates to the technical field of blade machining, in particular to a positioning method of a turbine blade surface machining groove.
Background
In an aeroengine, a turbine blade is provided with a wire passing hole, referring to fig. 2 and 3, an existing blade is provided with a wire passing hole by machining an upper edge plate of the blade, the wire passing hole penetrates through the edge plate and forms a groove on the lateral surface of a basin of a blade body, during machining, electric spark forming electrode machining is generally adopted, during machining, the blade is fixed through a fixing clamp, the axis of the wire passing hole to be machined is parallel to an electrode, and then the electrode with the corresponding diameter is selected for punching according to the diameter of the wire passing hole.
The position accuracy of the wire passing hole in the connecting line direction of the front edge and the rear edge is not high, the position is approximately proper, and the wire passing hole is prevented from being driven into the blade body or the side wall of the blade body during processing, so that the wire passing hole needs to be ensured to have higher position accuracy in the connecting line direction of the blade basin side and the back side. Before punching, the position of the hole in the direction of connecting the basin side and the back side can be determined by measuring and finding the distance between the end surface and the basin side of the blade body by taking the end surface of one end of the flange plate as a reference; however, because the shielding of the flange plate is difficult to measure, the positioning is inaccurate easily caused by measurement errors, and because the surface of the blade body is a curved surface, the distance from each wire passing hole to the reference is required to be measured, so that the workload is large and the efficiency is low.
Disclosure of Invention
The invention aims to provide a positioning method of a turbine blade surface machining groove, which aims to solve the defects in the prior art.
The embodiment of the invention is realized by the following technical scheme:
a positioning method of a turbine blade surface machining groove comprises the following steps:
s1, preparing work, comprising the following steps:
a. Marking a positioning line on the blade body according to the position requirement of the groove to be processed in the connecting line direction of the front edge and the rear edge;
b. clamping the blade through a fixing clamp, so that the axis of the wire passing hole is parallel to the electrode; and
C. lowering the electrode to the target height, propping a contact pin of a dial indicator or a dial indicator against one side of the electrode, fixing the dial indicator or the dial indicator and recording the reading;
s2, positioning operation: and (3) moving the electrode upwards, moving the blade, enabling the positioning line on the blade body to be propped against the contact pin of the dial indicator or the dial indicator, and enabling the reading to be consistent with the reading recorded in the step S1.
Alternatively, in step S1, the operation sequence of the three works of a, b and c is not limited.
Optionally, the dial indicator or the dial indicator is mounted on a support, and the support is fixedly connected with the electrode sliding table.
Optionally, the fixing clamp includes:
an upper supporting block for supporting the end face of the upper edge plate;
the lower support block is used for supporting the end face of the lower edge plate;
the upper movable clamping block is detachably connected with the upper fixed clamping block;
The lower movable clamping block is detachably connected with the lower fixed clamping block; and
The locating piece is arranged on the upper fixing clamping block or the lower fixing clamping block and is used for achieving the locating of the blade in the connecting line direction of the upper edge plate and the lower edge plate.
Optionally, the upper movable clamping block and the lower movable clamping block are respectively provided with a waist-shaped hole, the upper fixed clamping block and the lower fixed clamping block are respectively provided with a screw hole, and the waist-shaped holes are connected with the screw holes through screws.
The technical scheme of the invention has at least the following advantages and beneficial effects: in the invention, the position of the groove to be processed in the connecting line direction of the front edge and the rear edge is determined by scribing a positioning line; in the process of determining the position of the groove to be processed in the connecting line direction of the basin side and the back side, firstly, the contact pin of the dial indicator or the dial indicator is abutted against the electrode to obtain and record a reading, then the electrode is moved upwards, the clamped blade is moved towards the dial indicator or the dial indicator, the positioning line on the blade is abutted against the contact pin of the dial indicator or the dial indicator, and the reading is consistent with the reading recorded before, so that the position of the groove to be processed in the connecting line direction of the basin side and the back side is determined. The invention ensures that the reading of the blade body against the dial indicator or the dial indicator contact pin is equal to the reading of the electrode against the dial indicator or the dial indicator contact pin, thereby determining the position of the groove to be processed in the connecting line direction of the basin side and the back side.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for locating a turbine blade surface machining groove provided by the invention;
FIG. 2 is a schematic view of a conventional vane;
FIG. 3 is a schematic diagram of a conventional vane;
FIG. 4 is a state diagram before slot machining;
FIG. 5 is a schematic structural view of a fixing clamp;
FIG. 6 is a second schematic structural view of a fixing clamp;
Icon: 1-fixed clamps, 101-upper supporting blocks, 102-lower supporting blocks, 103-upper fixed clamping blocks, 104-upper movable clamping blocks, 105-lower fixed clamping blocks, 106-lower movable clamping blocks, 107-positioning pieces, 108-bases, 2-dial gauges, 201-contacts, 3-electrodes, 4-electrode sliding tables, 5-blades, 501-front edges, 502-rear edges, 503-basin facing sides, 504-back facing sides, 505-blade bodies, 506-upper edge plates, 507-lower edge plates, 508-wire passing holes, 509-grooves and 6-brackets.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a method for positioning a turbine blade surface machining groove includes the steps of:
S1, preparing work, wherein the preparing work comprises three works of a, b and c, and the preparation work comprises the following specific steps:
a. According to the position requirement of the groove 509 to be processed in the connecting line direction of the front edge 501 and the rear edge 502, a positioning line is defined on the blade body 505, it should be understood that the background art describes that the position accuracy requirement of the through line hole 508 (i.e. the groove 509 formed on the surface of the blade body 505) in the connecting line direction of the front edge 501 and the rear edge 502 is not high, so in actual operation, the positioning line is defined on the blade body 505 at the approximate position according to the number of the grooves 509;
b. clamping the blade 5 by the fixing clamp 1, so that the axis of the wire through hole 508 is parallel to the electrode 3;
c. the electrode 3 is lowered to the target height, the contact pin of the dial indicator 2 or the dial indicator is propped against one side of the electrode 3, the dial indicator 2 or the dial indicator is fixed, and the reading is recorded, and it is understood that after the electrode 3 is lowered, the tip of the electrode 3 is lower than the highest point of the positioning line, and the contact 201 of the dial indicator 2 or the dial indicator is vertical to the electrode 3. In some embodiments, a special fixing device may be provided for fixing the dial indicator 2 or the dial indicator, in this embodiment, taking the dial indicator 2 as an example (although other embodiments may also use the dial indicator), referring to fig. 4, the dial indicator 2 is installed on the support 6, and the support 6 is fixedly connected with the electrode sliding table 4, so that the dial indicator 2 can translate along with the electrode sliding table 4, but not lift along with the electrode 3.
It is easy to understand that the three operations of a, b and c do not affect each other, and thus the operation sequence of the three operations of this embodiment is not limited, i.e. may be the sequence of a, b and c, the sequences a, c and b may be the sequences b, a and c, the sequences b, c and a may be the sequences c, b and a, and the sequences c, a and b may be the sequences c, a and b.
S2, positioning operation: the electrode 3 is moved up and the blade 5 is moved so that the alignment on the blade body 505 is against the stylus of the dial gauge 2 and the reading is made consistent with the reading recorded in step S1.
It should be noted that, the position of the groove 509 to be processed in the connecting line direction of the front edge 501 and the rear edge 502 is determined by scribing a positioning line; the position of the groove 509 to be machined in the connecting line direction of the basin facing side 503 and the back facing side 504 is determined by ensuring that the reading of the blade body 505 against the contact pin of the dial indicator 2 is equal to the reading of the electrode 3 against the contact pin of the dial indicator 2.
In addition, it is easy to understand that before machining, the contact 201 of the dial indicator 2 contacts the blade 505, which corresponds to the edge of one side of the electrode 3, because the groove 509 is formed in the blade 505, before machining, the workpiece should be finely tuned according to the depth of the groove 509, for example, the depth of the groove 509 is half of the diameter of the electrode 3, the fine tuning distance is about the radius of the electrode 3, and after fine tuning, the dial indicator 2 should be removed to avoid damaging the contact 201 during machining.
Referring to fig. 4, 5 and 6, the fixing clamp 1 of the present embodiment includes an upper support block 101, a lower support block 102, an upper fixing clamp block 103, an upper movable clamp block 104, a lower fixing clamp block 105, a lower movable clamp block 106 and a positioning member 107, in practical application, the upper support block 101, the lower support block 102, the upper fixing clamp block 103 and the lower fixing clamp block 105 are fixedly connected to a base 108 by fasteners (e.g. screws, bolts), and the base 108 is mounted on a workbench of an electric discharge machine.
The upper supporting block 101 is used for supporting the end face of the upper edge plate 506, the lower supporting block 102 is used for supporting the end face of the lower edge plate 507, and the upper supporting block and the lower supporting block cooperate to realize the positioning of the blade 5 in the connecting line direction of the basin side 503 and the back side 504.
The upper fixed clamping block 103 and the upper movable clamping block 104 work together to clamp the upper edge plate 506; the lower fixed clamping block 105 and the lower movable clamping block 106 are used for clamping the lower edge plate 507, and meanwhile, the upper fixed clamping block 103 and the lower fixed clamping block 105 are combined to realize the positioning of the blade 5 in the direction of the connecting line of the front edge 501 and the rear edge 502, and the upper fixed clamping block 103 and the lower fixed clamping block 105 are integrally formed in the embodiment, namely, are one part. The upper movable clamping block 104 is detachably connected with the upper fixed clamping block 103, the lower movable clamping block 106 is detachably connected with the lower fixed clamping block 105, specifically, the upper movable clamping block 104 and the lower movable clamping block 106 in the embodiment are respectively provided with a waist-shaped hole, the upper fixed clamping block 103 and the lower fixed clamping block 105 are respectively provided with a screw hole, the waist-shaped holes are connected with the screw holes through screws, and the waist-shaped holes are arranged so as to facilitate fine adjustment of the positions of the upper movable clamping block 104 and the lower movable clamping block 106.
The positioning member 107 of this embodiment is disposed on the upper fixing clamp 103, which is cylindrical and is used for positioning the blade 5 in the direction of the connecting line between the upper edge plate 506 and the lower edge plate 507. It should be appreciated that in other embodiments, the positioning member 107 may be provided on the lower fixing clip 105, in the shape of a hexahedron, with a surface to achieve positioning.
Furthermore, it should be understood that the specific structure of the fixing fixture 1 is only an option of the present embodiment, and is not a limitation, and in other embodiments, only the fixing of the blade 5 is realized and the axis of the wire hole 508 to be processed is directed upward (i.e. parallel to the electrode 3), for example, a six-point positioning tool for the blade 5 provided in the publication number "CN113953859a" filed by the applicant is adopted.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The positioning method of the turbine blade surface machining groove is characterized by comprising the following steps of:
s1, preparing work, comprising the following steps:
a. Marking a positioning line at the position of the groove to be processed on the blade body according to the position requirement of the groove to be processed in the connecting line direction of the front edge and the rear edge and the number of the grooves to be processed;
b. Clamping the blade through a fixing clamp, so that the axis of the wire passing hole faces upwards and is parallel to the electrode; and
C. The dial indicator or the dial indicator is arranged on the support, and the support is fixedly connected with the electrode sliding table, so that the dial indicator or the dial indicator can translate along with the electrode sliding table and does not lift along with the electrode; lowering the electrode to the target height, propping a contact pin of a dial indicator or a dial indicator against one side of the electrode, fixing the dial indicator or the dial indicator and recording the reading; after the electrode is lowered, the tip of the electrode is lower than the highest point of the positioning line, and a contact of the dial indicator or the dial indicator is vertical to the electrode;
S2, positioning operation: and (2) moving the electrode upwards, moving the blade, enabling the positioning line on the blade body to be propped against the contact pin of the dial indicator or the dial indicator, and enabling the reading to be consistent with the reading recorded in the step (S1), thereby determining the position of the groove to be processed in the connecting line direction of the basin side and the back side.
2. The method for positioning a turbine blade surfacing groove according to claim 1, wherein in step S1, the order of operation of the three works of a, b, and c is not limited.
3. The method of positioning a turbine blade surfacing groove according to claim 1, wherein the fixture comprises:
an upper supporting block for supporting the end face of the upper edge plate;
the lower support block is used for supporting the end face of the lower edge plate;
the upper movable clamping block is detachably connected with the upper fixed clamping block;
The lower movable clamping block is detachably connected with the lower fixed clamping block; and
The locating piece is arranged on the upper fixing clamping block or the lower fixing clamping block and is used for achieving the locating of the blade in the connecting line direction of the upper edge plate and the lower edge plate.
4. The method for positioning a machining groove on a surface of a turbine blade according to claim 3, wherein the upper movable clamping block and the lower movable clamping block are respectively provided with a kidney-shaped hole, and the upper fixed clamping block and the lower fixed clamping block are respectively provided with a screw hole, and the kidney-shaped holes are connected with the screw holes through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410453634.6A CN118046052B (en) | 2024-04-16 | 2024-04-16 | Positioning method for turbine blade surface machining groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410453634.6A CN118046052B (en) | 2024-04-16 | 2024-04-16 | Positioning method for turbine blade surface machining groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118046052A CN118046052A (en) | 2024-05-17 |
| CN118046052B true CN118046052B (en) | 2024-07-16 |
Family
ID=91046866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410453634.6A Active CN118046052B (en) | 2024-04-16 | 2024-04-16 | Positioning method for turbine blade surface machining groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118046052B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6073434B1 (en) * | 2015-09-30 | 2017-02-01 | 株式会社牧野フライス製作所 | Small hole electric discharge machine |
| CN112676661A (en) * | 2020-11-25 | 2021-04-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Process device for electrically processing gas film hole by high-pressure turbine guide blade |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3962937A (en) * | 1974-07-18 | 1976-06-15 | Miller Leo C | Error adjustment method and structure for lathes and the like |
| US6850874B1 (en) * | 1998-04-17 | 2005-02-01 | United Technologies Corporation | Method and apparatus for predicting a characteristic of a product attribute formed by a machining process using a model of the process |
| US6910854B2 (en) * | 2002-10-08 | 2005-06-28 | United Technologies Corporation | Leak resistant vane cluster |
| FR2952841B1 (en) * | 2009-11-26 | 2011-12-02 | Airbus Operations Sas | DEVICE FOR DRILLING A COMPLEX PANEL |
| FR2956996B1 (en) * | 2010-03-05 | 2012-06-01 | Snecma | DEVICE FOR MAINTAINING A DAWN BY ITS BLADE DURING THE MACHINING OF ITS FOOT |
| RU190578U1 (en) * | 2018-10-08 | 2019-07-04 | Ростовский вертолетный производственный комплекс, Публичное акционерное общество "Роствертол" имени Б.Н. Слюсаря | Device for checking and adjusting the alignment of the aggregates of the turning machining center |
| CN212398388U (en) * | 2020-06-11 | 2021-01-26 | 江苏源清动力技术有限公司 | Turbine blade tool clamp for machining of linear cutting machine |
| CN112620838B (en) * | 2021-03-10 | 2021-06-25 | 成都和鸿科技有限公司 | Integral machining method for guide vane basin dorsal sealing groove |
| FR3137857B1 (en) * | 2022-07-18 | 2024-08-23 | Safran Aircraft Engines Mexico Sa De C V | Electrode cutting system |
| CN117001087A (en) * | 2023-09-28 | 2023-11-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Blade clamp capable of achieving electric spark machining and numerical control milling |
-
2024
- 2024-04-16 CN CN202410453634.6A patent/CN118046052B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6073434B1 (en) * | 2015-09-30 | 2017-02-01 | 株式会社牧野フライス製作所 | Small hole electric discharge machine |
| CN112676661A (en) * | 2020-11-25 | 2021-04-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Process device for electrically processing gas film hole by high-pressure turbine guide blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118046052A (en) | 2024-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210036535U (en) | Engine connecting rod height gauge | |
| CN118046052B (en) | Positioning method for turbine blade surface machining groove | |
| CN211317140U (en) | Deep hole step height measuring device | |
| CN211072029U (en) | Accurate equipment of cuting of high accuracy steel pipe | |
| CN218673405U (en) | A detect structure for public four corners of clamping copper detects | |
| CN110405394B (en) | Positioning device for welding cylinder barrel of hydraulic cylinder | |
| CN214792937U (en) | Absolute verticality measuring tool | |
| CN106903612B (en) | Tool detector and implementation method | |
| CN111561852A (en) | Test fixture zero point positioning tool structure | |
| CN218155838U (en) | Precision position measuring instrument | |
| CN106247906B (en) | A kind of profile overall size measurement tooling and measurement method | |
| CN212620429U (en) | Axial position measuring device for groove of tool shank | |
| CN211503869U (en) | Angle micrometer with center positioning function | |
| CN220783620U (en) | Clamp span adjusting mechanism | |
| CN211783249U (en) | Quick measuring and checking tool for verticality of workpiece | |
| CN218822105U (en) | Auxiliary detection device for workpiece quality inspection | |
| CN220708294U (en) | Electrode rapid detection device | |
| CN217005703U (en) | Auxiliary jig for measuring milling cutter | |
| CN216620947U (en) | Measuring tool for measuring diameter size of inclined plane of inverted conical surface | |
| CN216484416U (en) | Impact tester sample support | |
| CN221621646U (en) | Profile measuring device | |
| CN220583265U (en) | Quick measuring tool for arc length of single crystal square rod | |
| CN220649315U (en) | External diameter measuring device with positioning function | |
| CN221840840U (en) | Jaw device of full-adaptive tensile testing machine | |
| CN219798199U (en) | Gauge for producing automobile parts |
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 |