CN110907147A - Mechanical life test device for high-voltage switch contact finger - Google Patents
Mechanical life test device for high-voltage switch contact finger Download PDFInfo
- Publication number
- CN110907147A CN110907147A CN201811076279.6A CN201811076279A CN110907147A CN 110907147 A CN110907147 A CN 110907147A CN 201811076279 A CN201811076279 A CN 201811076279A CN 110907147 A CN110907147 A CN 110907147A
- Authority
- CN
- China
- Prior art keywords
- contact
- moving contact
- voltage switch
- mounting part
- test device
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a mechanical life test device for a high-voltage switch contact finger, which comprises a movable support and a fixed support, wherein a fixed contact mounting part is arranged on the fixed support, a movable contact mounting part is arranged on the movable support, the movable support can move relative to the fixed support to relatively close or open a movable contact and a fixed contact, an adjusting mechanism is arranged on the movable support and/or the fixed support, and the adjusting mechanism is used for adjusting the relative angle and/or the relative radial position between the movable contact mounting part and the fixed contact mounting part to adjust the assembly error between the movable contact and the fixed contact, so that the processes of closing and opening between the movable contact and the fixed contact of a high-voltage switch can be completely simulated, the assembly error of the movable contact relative to the fixed contact in the actual assembly process can be simulated, and the actual abrasion.
Description
Technical Field
The invention relates to a mechanical life test device for a contact finger of a high-voltage switch.
Background
The switch contact finger is one of the key components of a high-voltage switch and is mainly used for electrifying contact between two relative motion conductors. The performance of the high-voltage switch is directly influenced by the quality of the contact. The key characteristics of the switch contact are as follows: contact resistance, structural stress, surface wear, etc. The research on the change of the characteristics through experiments has very important guiding significance for the optimal design of the contact. At present, the requirement for the mechanical life of the high-voltage switch in the industry is increased year by year and is increased to more than 10000 times of switching on and switching off. In the process of a mechanical life test, the moving contact and the static contact are continuously collided and rubbed, and meanwhile, if assembly errors exist between the moving contact and the static contact, such as radial deviation or inclination, the abrasion of the contact is aggravated, and even the designed mechanical life cannot be reached. However, because assembly errors are unavoidable, the performance of the fingers in the presence of assembly errors is taken into account in the design of the fingers. The existing verification method is complete machine verification and can be carried out after the prototype is assembled, the time cost and the economic cost are high, error control cannot be realized, the deformation damage state of the contact finger cannot be observed and recorded, and the later-stage improvement cannot be started.
Meanwhile, the invention patent application document with publication number CN105258932A discloses a mechanical life test device for a high-voltage switch contact, which includes a fixed support and a movable support capable of reciprocating linearly relative to the fixed support, the fixed support is provided with a static contact connecting conductor, the static contact connecting conductor is provided with a static contact mounting part for mounting a static contact and a static terminal for connecting a static contact port measuring line, the movable support is provided with a movable contact connecting conductor, the movable contact connecting conductor is provided with a movable contact mounting part for mounting a movable contact and a movable terminal for connecting the movable contact port measuring line, and the movable support moves relative to the fixed support to enable the movable contact and the static contact to be relatively closed or disconnected. The device can change different sound contacts and simulate the process that the sound contact closed, breaks off in the use of reality and test. The contact has strong universality, and is convenient for observing the action when the contact is contacted and the abrasion condition after multiple times of contact.
However, the test device has no structure capable of simulating the assembly error between the moving contact and the static contact, and the abrasion condition of contact collision of the switching-on during the time division of the moving contact and the static contact with the assembly error cannot be truly reflected, so that the simulated mechanical life has no convincing effect, and the test conclusion cannot meet the actual requirement.
Disclosure of Invention
The invention aims to provide a mechanical life test device for a high-voltage switch contact finger, which aims to solve the problem that the mechanical life obtained by a test is inaccurate because the test device in the prior art cannot simulate the assembly error of a moving contact and a static contact.
In order to achieve the purpose, the technical scheme of the mechanical life test device for the contact finger of the high-voltage switch is as follows:
the high-voltage switch contact finger mechanical life testing device comprises a movable support and a fixed support, wherein a static contact mounting part is arranged on the fixed support, a moving contact mounting part is arranged on the movable support, the movable support can move relative to the fixed support to enable the moving contact and the static contact to be relatively closed or disconnected, an adjusting mechanism is arranged on the movable support and/or the fixed support, and the adjusting mechanism is used for adjusting the relative angle and/or the relative radial position between the moving contact mounting part and the static contact mounting part to simulate the assembly error between the moving contact and the static contact.
Furthermore, in order to facilitate design and unified control of actions, the movable support comprises a support body, and the adjusting mechanism is arranged between the moving contact mounting part and the support body.
Furthermore, in order to meet the requirement of adjusting the angular deviation, the adjusting mechanism comprises an adjusting rod hinged to the moving contact mounting part, and a first rotating motor used for adjusting the relative angle between the moving contact mounting part and a part of the adjusting rod is arranged at the hinged position between the moving contact mounting part and the adjusting rod.
Furthermore, in order to meet the requirements of adjusting the angular deviation and the radial deviation, the adjusting rod is hinged to the frame body, and the adjusting mechanism further comprises a second rotating motor which is arranged at the hinged position of the adjusting rod and the frame body to adjust the relative angle of the adjusting rod and the frame body.
Furthermore, in order to simulate the actual working condition that the movable end guide rod drives the movable contact to move, the frame body comprises a base and a suspension rod movably assembled with the base along the separation and combination direction of the movable contact mounting part and the static contact mounting part, the adjusting mechanism is arranged at the output end of the suspension rod, and the base is provided with a driving mechanism for driving the suspension rod to move so as to realize the movement of the movable contact mounting part towards and away from the static contact mounting part.
Furthermore, in order to realize the simulation of any stroke characteristic curve of the moving contact, the moving contact is controlled to output a designed stroke curve, the actual motion characteristic of the high-voltage switch is simulated, the action interval and the test times of the moving contact are controlled, and the driving mechanism comprises a servo motor for driving the suspension rod to act.
Furthermore, in order to facilitate the installation of the moving contact and realize the rapid clamping of the moving contact, the moving contact installation part is an electromagnetic chuck, and the electromagnetic chuck is provided with an adsorption surface for adsorbing and fixing the moving contact.
Furthermore, in order to realize the mechanical life test of the moving contacts with different types and sizes, the electromagnetic chuck can realize quick clamping of the moving contacts with different sizes, and the adsorption surface is provided with adsorption positions for adsorbing the moving contacts with different outer diameter sizes.
Furthermore, in order to better control the adjusting function of the adjusting mechanism, the testing device further comprises a control system, and the control system comprises a control computer which is used for being in control connection with the adjusting mechanism.
Furthermore, in order to record the deformation and damage state of the contact finger in the mechanical life test process, the test device further comprises an observation system, and the observation system comprises a high-speed camera for detecting the contact collision process between the moving contact and the static contact.
The invention has the beneficial effects that: compared with the prior art, the high-voltage switch contact finger mechanical life test device provided by the invention has the advantages that the adjusting mechanism for adjusting the relative angle and the relative radial deviation between the moving contact mounting part and the static contact mounting part is arranged on the movable support, so that the closing and opening processes between the moving contact and the static contact of the high-voltage switch can be completely simulated in the actual test process, the assembly error of the moving contact relative to the static contact in the actual assembly process is simulated, and the actual abrasion working condition is met. Meanwhile, during operation, through mechanical life test verification under the working condition of simulating assembly errors, deformation and damage development processes of the contact under various errors are observed, and reference is provided for design improvement of the contact finger. The test verification cost of the mechanical life of the contact finger can be effectively reduced, and the overall mechanical reliability and the working capacity of the high-voltage switch are improved. Simple structure, easy operation, test result laminating real operating mode condition moreover.
Drawings
Fig. 1 is a schematic structural diagram of a mechanical life test device for a high-voltage switch contact finger according to a specific embodiment of the invention.
Description of reference numerals: 1-a base; 2-a suspension rod; 3-a servo motor; 4-a rotating electrical machine; 5-an electromagnetic chuck; 6-moving contact; 7-static contact; 8-high speed camera; 9-control the computer; 10-adjusting rod.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In the embodiment of the mechanical life test device for the contact finger of the high-voltage switch, as shown in fig. 1, the mechanical life test device for the contact finger of the high-voltage switch is used for simulating the actual closing and opening processes of the moving contact 6 and the static contact 7 in the high-voltage switch, so that the mechanical life of the moving contact 6 and the static contact 7 is detected, and data support is provided for the subsequent design of the contact finger.
In order to simulate the real separation and combination process of the moving contact 6 and the static contact 7, the testing device comprises a movable support and a fixed support, wherein the fixed support is provided with a static contact mounting part, the movable support is provided with a moving contact mounting part, the corresponding static contact 7 to be subjected to a simulation test is fixed on the static contact mounting part, and the moving contact 6 is fixed on the moving contact mounting part. Meanwhile, the movable support can move relative to the fixed support to enable the corresponding moving contact 6 and the corresponding static contact 7 to be relatively closed or opened, so that the driving mode of the moving contact 6 and the static contact 7 in the actual opening and closing process can be simulated.
For the movable support, an adjusting mechanism is arranged on the movable support, the adjusting mechanism is used for adjusting the relative angle and the relative radial position between the moving contact mounting part and the static contact mounting part to adapt to the assembly error between the moving contact 6 and the static contact 7, and particularly, the adjusting mechanism is realized by adjusting the inclination angle and the radial deviation of the moving contact mounting part relative to the static contact mounting part. Of course, in other embodiments, the fixed support may also be provided with an adjusting mechanism, and at this time, error compensation is realized by adjusting the radial deviation and the inclination angle of the static contact mounting part relative to the moving contact mounting part; of course, adjusting mechanisms can be arranged on the movable support and the fixed support, and real working condition simulation is realized through synchronous adjustment. In other embodiments, the operating condition with the angular deviation can be simulated only by adjusting the relative angle between the moving contact mounting part and the static contact mounting part, and the operating condition with the radial position deviation can also be simulated only by adjusting the relative radial position between the moving contact mounting part and the static contact mounting part.
The movable support comprises a base 1 and a suspension rod 2 arranged on the base 1, and the suspension rod 2 is movably assembled on the base 1 along the separation and combination direction of the moving contact mounting part and the static contact mounting part, so that the suspension rod 2 can simulate the actual working condition that a moving end guide rod drives the moving contact 6 to move. The adjusting mechanism is arranged at the output end of the suspension rod 2, and the base 1 is provided with a driving mechanism for driving the suspension rod 2 to move so as to realize the moving of the moving contact mounting part towards and away from the static contact mounting part. The driving mechanism drives the suspension rod 2 to move, so that the moving contact 6 is driven to move to realize the opening and closing actions with the static contact 7. In other embodiments, the movable support may be designed as a swing arm structure, the suspension rod is hinged to the base in a swing arm manner, and the movable contact and the fixed contact are opened and closed in a swing process.
The driving mechanism is the servo motor 3 in the embodiment, and meanwhile, the servo motor 3 is a linear motor, so that simulation of any stroke characteristic curve of the moving contact 6 can be realized, the designed stroke curve of the moving contact 6 is controlled, the actual motion characteristic of the high-voltage switch is simulated, the action interval and the test times of the moving contact 6 are controlled, the structure is simpler, and the actual guiding driving is more stable and accurate. Of course, in other embodiments, the driving mechanism may also be configured as a rotating motor and a lead screw nut mechanism cooperating with the rotating motor, wherein the rotating motor and the lead screw are assembled on the base, and the suspension rod is fixed on the nut, so that the moving contact can be driven to act by controlling the rotation of the lead screw, and the time interval, the test times and the like of the moving contact can be controlled in a simulated manner.
For the adjusting mechanism, the adjusting mechanism is arranged on the suspension rod 2, and the design is convenient. Of course, in other embodiments, it may be disposed on the fixing bracket. The adjusting mechanism comprises an adjusting rod 10 connected with the suspension rod 2 in a hinged mode, the adjusting rod 10 is provided with an input end and an output end, the input end is in hinged fit with the suspension rod 2 to achieve relative swing between the input end and the suspension rod, and the moving contact mounting portion is connected to the output end of the adjusting rod 10 in a hinged mode. Meanwhile, the adjusting mechanism further comprises a rotating motor 4 which is arranged at the hinged position of the adjusting rod 10 and the moving contact mounting part to adjust the corresponding relative angle of the adjusting rod and the moving contact mounting part and is arranged at the hinged position of the adjusting rod 10 and the suspension rod 2 to adjust the relative angle of the adjusting rod and the moving contact mounting part, and the two rotating motors 4 are respectively a first rotating motor and a second rotating motor. Two rotating electrical machines 4 are configured, the two rotating electrical machines 4 are controlled to rotate, the moving contact installation can be adjusted relative to the position and the angle of the suspension rod, the moving contact installation part is adjusted, and the deflection angle and the radial deviation of the moving contact 6 relative to the static contact 7 under the actual working condition are met. Of course, in other embodiments, only one rotating motor may be provided, and the other rotating motor may be provided with a linear motor, so that the intermediate rod and the input end or the output end are driven by the linear motor to slide and cooperate with each other to realize displacement in the radial direction, and the rotating motor may control the deflection angle of the output end relative to the input end. Of course, in other embodiments, the adjusting mechanism may be a rotating electrical machine disposed between the movable contact mounting portion and the suspension rod, and the radial deviation and the like may be controlled by adjusting the mounting position of the movable contact on the movable contact mounting portion and controlling the angular deviation by controlling the operation of the rotating electrical machine. In other embodiments, when only the radial deviation needs to be adjusted and compensated, the sliding assembly of the suspension rod and the moving contact mounting part only needs to be designed and driven by a linear motor; when the compensation deflection angle is only required to be adjusted, the suspension rod is only required to be hinged with the moving contact mounting part and adjusted through the rotating motor. In other embodiments, in order to achieve better simulation effect of the moving contact mounting portion, the number of the adjusting rods can be added according to actual conditions, two adjusting rods hinged to each other can be arranged, and the hinge axes of the two adjusting rods are perpendicular to the hinge axes of the suspension rod and the adjusting rods, so that radial adjustment in all directions can be achieved.
For the moving contact mounting part, the adjusting mechanism is connected with an electromagnetic chuck 5, the electromagnetic chuck 5 forms the moving contact mounting part, and the electromagnetic chuck 5 is provided with an adsorption surface for adsorbing and fixing the moving contact 6. Through the design of the electromagnetic chuck 5, the moving contact 6 can be conveniently installed, and the moving contact 6 can be quickly clamped. Of course, in other embodiments, the electromagnetic chuck may be replaced by a screw rod connecting contact or a clamp clamping moving contact.
In this embodiment, the adsorption surface of the electromagnetic chuck 5 has an adsorption position for adsorbing the moving contacts 6 with different outer diameters, so that the mechanical life test for the moving contacts 6 with different types and sizes can be realized, and the electromagnetic chuck 5 can be quickly clamped for the moving contacts 6 with different sizes, and has certain universality. Of course, in other embodiments, it is also possible to design only the adsorption surface to satisfy only one installation dimension of the movable contact.
In this embodiment, the testing apparatus further includes a control system, the control system includes a control computer 9 for being in control connection with the adjusting mechanism, the control computer 9 is respectively connected with the servo motor and the rotating electrical machine through signal lines, and the adjustment of the moving contact 6 is realized through data analysis of the terminal, so as to meet the actual separation and combination working condition of the moving contact 6 and the static contact 7. By adjusting the control program, the servo motor can be controlled to output a designed stroke curve, the consistency of the stroke curve output by the system and an actual high-voltage switch is ensured, and the mechanical life test process and times are controlled.
In this embodiment, the test apparatus further comprises an observation system comprising a high-speed camera 8 for detecting the collision process between the moving contact 6 and the stationary contact 7. The deformation and the damage state of the contact finger in the mechanical life test process are observed and recorded through the high-speed camera 8, and a reference is provided for the design improvement of the contact finger.
Claims (10)
1. High-voltage switch touches and indicates mechanical life test device, including movable support and fixed bolster, be equipped with the static contact installation department on the fixed bolster, be equipped with the moving contact installation department on the movable support, but movable support relatively fixed bolster motion and make moving contact and static contact relatively closed or break off its characterized in that: the movable support and/or the fixed support are/is provided with an adjusting mechanism, and the adjusting mechanism is used for adjusting the relative angle and/or the relative radial position between the moving contact mounting part and the static contact mounting part so as to simulate the assembly error between the moving contact and the static contact.
2. The mechanical life test device for the high-voltage switch contact finger of claim 1, characterized in that: the movable support comprises a support body, and the adjusting mechanism is arranged between the moving contact mounting part and the support body.
3. The mechanical life test device for the high-voltage switch contact finger of claim 2, characterized in that: the adjusting mechanism comprises an adjusting rod hinged with the moving contact mounting part, and a first rotating motor used for adjusting the relative angle between the moving contact mounting part and a part of the adjusting rod is arranged at the hinged position between the moving contact mounting part and the adjusting rod.
4. The mechanical life test device for the high-voltage switch contact finger of claim 3, characterized in that: the adjusting rod is hinged with the frame body, and the adjusting mechanism further comprises a second rotating motor which is arranged at the hinged position of the adjusting rod and the frame body to adjust the relative angle of the adjusting rod and the frame body.
5. The mechanical life test device for the high-voltage switch contact finger according to any one of claims 2 to 4, characterized in that: the support body includes the base and with the base along the beam that the deciliter direction activity assembly of moving contact installation department and static contact installation department, adjustment mechanism sets up the output at the beam, be equipped with on the base and be used for driving the beam motion in order to realize moving contact installation department orientation and deviate from the actuating mechanism that the static contact installation department removed.
6. The mechanical life test device for the high-voltage switch contact finger of claim 5, characterized in that: the driving mechanism comprises a servo motor for driving the suspension rod to act.
7. The mechanical life test device for the high-voltage switch contact finger according to any one of claims 1 to 4, characterized in that: the moving contact mounting part is an electromagnetic chuck, and the electromagnetic chuck is provided with an adsorption surface for adsorbing and fixing the moving contact.
8. The mechanical life test device for the contact finger of the high-voltage switch according to claim 7, characterized in that: the adsorption surface is provided with adsorption sites for adsorbing moving contacts with different outer diameter sizes.
9. The mechanical life test device for the high-voltage switch contact finger according to any one of claims 1 to 4, characterized in that: the testing device further comprises a control system, and the control system comprises a control computer which is used for being in control connection with the adjusting mechanism.
10. The mechanical life test device for the high-voltage switch contact finger according to any one of claims 1 to 4, characterized in that: the test device also comprises an observation system, wherein the observation system comprises a high-speed camera for detecting the contact collision process between the moving contact and the fixed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811076279.6A CN110907147A (en) | 2018-09-14 | 2018-09-14 | Mechanical life test device for high-voltage switch contact finger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811076279.6A CN110907147A (en) | 2018-09-14 | 2018-09-14 | Mechanical life test device for high-voltage switch contact finger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110907147A true CN110907147A (en) | 2020-03-24 |
Family
ID=69812366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811076279.6A Pending CN110907147A (en) | 2018-09-14 | 2018-09-14 | Mechanical life test device for high-voltage switch contact finger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110907147A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236375A (en) * | 2021-12-17 | 2022-03-25 | 国网安徽省电力有限公司电力科学研究院 | GIS contact finger electrical contact degradation simulation test system considering eccentric working condition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005186A (en) * | 2006-01-17 | 2007-07-25 | 明基电通股份有限公司 | Plug and pull out detector for connector |
| CN102262046A (en) * | 2011-04-22 | 2011-11-30 | 北京邮电大学 | Method and device for testing service life of connector |
| CN204228040U (en) * | 2014-11-14 | 2015-03-25 | 中黔电气集团股份有限公司 | A kind of check-out console checking moving contact of breaker position deviation |
| CN105258932A (en) * | 2015-11-03 | 2016-01-20 | 国家电网公司 | Mechanical service lifetime test apparatus of high-voltage switch contact |
| CN207763947U (en) * | 2018-02-01 | 2018-08-24 | 龙岩亿隆电力设备有限公司 | A kind of Mume flower contact and static contact coordinate test fixture |
-
2018
- 2018-09-14 CN CN201811076279.6A patent/CN110907147A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005186A (en) * | 2006-01-17 | 2007-07-25 | 明基电通股份有限公司 | Plug and pull out detector for connector |
| CN102262046A (en) * | 2011-04-22 | 2011-11-30 | 北京邮电大学 | Method and device for testing service life of connector |
| CN204228040U (en) * | 2014-11-14 | 2015-03-25 | 中黔电气集团股份有限公司 | A kind of check-out console checking moving contact of breaker position deviation |
| CN105258932A (en) * | 2015-11-03 | 2016-01-20 | 国家电网公司 | Mechanical service lifetime test apparatus of high-voltage switch contact |
| CN207763947U (en) * | 2018-02-01 | 2018-08-24 | 龙岩亿隆电力设备有限公司 | A kind of Mume flower contact and static contact coordinate test fixture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236375A (en) * | 2021-12-17 | 2022-03-25 | 国网安徽省电力有限公司电力科学研究院 | GIS contact finger electrical contact degradation simulation test system considering eccentric working condition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105258932B (en) | High-voltage switch contact mechanical endurance test device | |
| WO2017156778A1 (en) | Test fixture for electronic product | |
| KR940027052A (en) | Connection method in inspection device and inspection device | |
| CN108020164B (en) | Thickness detection experiment platform | |
| US11761867B2 (en) | Methods and apparatus to perform load measurements on hinged devices | |
| CN106443235B (en) | Electrical contact material electrical contact performance simulation test device and test method | |
| CN110907147A (en) | Mechanical life test device for high-voltage switch contact finger | |
| US11885773B2 (en) | Methods and apparatus to perform load measurements on flexible substrates | |
| CN114585897A (en) | Method and apparatus for performing load measurements on flexible substrates | |
| US20220357255A1 (en) | Methods and apparatus to perform load measurements on multi-hinged devices | |
| CN110320461A (en) | A kind of circuit board testing device | |
| CN111077429A (en) | Automatic testing machine for flexible circuit board | |
| CN1573311B (en) | Orientable sample holder having a zero-point indication, for a microtome | |
| CN116214059B (en) | Dedicated welding robot positioner of nursing bed board | |
| KR101704993B1 (en) | Testing apparatus and method for door endurance | |
| CN108152690B (en) | Rotating contact arc experimental device | |
| JP5627408B2 (en) | Probe unit and board inspection device | |
| CN218037208U (en) | Transverse positioning mechanism and positioning device for circuit breaker testing | |
| US20240175793A1 (en) | Specimen insertion and alignment devices, and material testing systems including specimen insertion and alignment devices | |
| CN111060804A (en) | Automatic test fixture of flexible circuit board | |
| CN211556399U (en) | Automatic centering fixture for leaf spring jack of electric connector | |
| KR20160070453A (en) | Device for aligning camera module in socket | |
| CN104597127A (en) | TOFD ultrasonic nondestructive testing robot system applicable to steam turbine welding rotor | |
| KR20040086412A (en) | Contact actuator with contact force control | |
| JPH07218540A (en) | Probe with buffer |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200324 |