CN113192906B - Crimping type power electronic device valve group with press-fitting tool - Google Patents
Crimping type power electronic device valve group with press-fitting tool Download PDFInfo
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- CN113192906B CN113192906B CN202110449456.6A CN202110449456A CN113192906B CN 113192906 B CN113192906 B CN 113192906B CN 202110449456 A CN202110449456 A CN 202110449456A CN 113192906 B CN113192906 B CN 113192906B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/32—Holders for supporting the complete device in operation, i.e. detachable fixtures
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Abstract
The invention discloses a crimping type power electronic device valve group with a press-fitting tool, which belongs to the technical field of electronic devices and comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with the lower surface of a box body, the upper surface of the box body is fixedly connected with the lower surface of a supporting plate, the upper surface of the supporting plate is overlapped with the lower surface of a connecting plate, the upper surface of the connecting plate is fixedly connected with the lower surface of a supporting frame, and a bearing is clamped on the upper surface of the bottom plate. This crimping formula power electronic device valves with pressure equipment frock through setting up box body, handle, ring gear, ring, gear, threaded rod, clamp plate and placing the hole, makes electronic device be in electronic hydraulic stem central point all the time put, can stabilize when making electronic hydraulic stem extension drive clamp plate and move down and carry out the pressure equipment to electronic device, makes electronic device be difficult for the skew position after the pressurized, can not appear dislocation and damage the condition of electronic device because of interface department atress is uneven to improve the stability of pressure equipment.
Description
Technical Field
The invention belongs to the technical field of power electronic devices, and particularly relates to a crimping type power electronic device valve group with a press-fitting tool.
Background
The power electronic device is the core of the contemporary power electronic technology, and at present, high-voltage high-power electronic devices (such as diodes, thyristors, IGBTs, IGCTs and the like) mainly adopt two packaging types of a modular type and a crimping type, the crimping type power electronic device has excellent characteristics such as double-sided heat dissipation characteristic, short circuit failure mode and the like, and is particularly suitable for serial application occasions of a large number of devices, has unique advantages in the application occasions with larger power, the crimping type power electronic device can normally work only by applying pressure of tens of kilonewtons on two sides of the crimping type power electronic device, and has higher requirements on the size and uniformity of crimping force, so that more difficulties exist for mounting and using the crimping type power electronic device.
The existing power electronic device valve group is usually required to place an electronic device on a table top when in press mounting work, pressure is provided by manually and frequently rotating a bolt, inconvenience is brought to press mounting work, meanwhile, limit work on the electronic device cannot be achieved in the press mounting process, the electronic device is easy to deviate from the position after being pressed, dislocation is caused by uneven stress at an interface, and the electronic device is damaged, so that the press mounting power electronic device valve group with the press mounting tool is required.
Disclosure of Invention
(one) solving the technical problems
In order to overcome the defects in the prior art, the invention provides the crimping power electronic device valve group with the press-fitting tool, which solves the problems that the pressure is provided by manually and frequently rotating a bolt, inconvenience is brought to crimping work, meanwhile, the limit work of an electronic device cannot be realized in the crimping process, the electronic device is easy to deviate from the position after being pressed, and the interface is unevenly stressed, misplaced and damaged.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a crimping formula power electronic device valves with pressure equipment frock, includes the bottom plate, the upper surface of bottom plate and the lower fixed surface of box body are connected, the upper surface of box body and the lower fixed surface of backup pad are connected, the upper surface of backup pad and the lower surface overlap joint of connecting plate, the upper surface of connecting plate and braced frame's lower fixed surface are connected, the upper surface joint of bottom plate has the bearing, rotating assembly has been cup jointed in the bearing.
The top of rotating assembly meshes with four gears mutually, the gear joint is at the surface of screw thread section of thick bamboo, the screw thread section of thick bamboo cup joints in the axle sleeve, and four axle sleeves are evenly offered at the surface of ring, screw thread section of thick bamboo internal thread connection has the threaded rod, one end and one side fixed connection of splint of threaded rod, the other end and the one end fixed connection of telescopic link of threaded rod, the one end and the inner wall fixed connection of box body that four telescopic links kept away from each other, the one side that four splint are close to each other all is provided with the rubber pad.
The upper surfaces of the supporting plate and the connecting plate are provided with placing holes, the upper surface of the supporting frame is fixedly connected with the lower surface of the top plate, the top of the inner wall of the top plate is provided with a pushing and pressing component, and the pushing and pressing component penetrates through the top of the supporting frame and is fixedly connected with the upper surface of the pressing plate.
The rotating assembly comprises a gear ring, the inner wall of the gear ring is fixedly connected with the outer wall of an inner ring, the inner ring is arranged in a bearing, and a plurality of teeth arranged on the upper surface of the gear ring are meshed with four gears.
The front of ring gear and the one end fixed connection of handle just the handle extends to outside the box body, the handle sets up in the through-hole, the through-hole is seted up in the front of box body.
The pushing component comprises an electric hydraulic rod, the electric hydraulic rod is clamped on the upper surface of the inner wall of the top plate and the upper surface of the supporting frame, a pressure gauge is arranged at the top of the electric hydraulic rod and is clamped on the upper surface of the top plate, the bottom end of the electric hydraulic rod is fixedly connected with the upper surface of the pressing plate, and the bottom of the pressing plate is an elastic contact surface.
As a further aspect of the invention: four corners of connecting plate upper surface department all is provided with adjusting part, and four adjusting part pass connecting plate and backup pad all with the upper surface fixed connection of bottom plate, adjusting part's top is provided with the stopper.
As a further aspect of the invention: the four corners of bottom plate upper surface department all is provided with the supporting shoe, and the one end that four supporting shoes are close to each other is respectively with the left and right sides face fixed connection of box body.
As a further aspect of the invention: the left side face and the right side face of the supporting frame are respectively provided with an antistatic plate, and the lower surface of the bottom plate is fixedly connected with the upper surfaces of the two anti-skid pads.
As a further aspect of the invention: the upper surface of the inner wall of the supporting frame is fixedly connected with a sliding seat, and a pulling curtain is connected in the sliding seat in a sliding manner.
(III) beneficial effects
Compared with the prior art, the invention has the beneficial effects that:
1. this crimping formula power electronic device valves with pressure equipment frock through setting up box body, the handle, the ring gear, the ring, the gear, the threaded rod, the clamp plate and place the hole, can place it in placing the hole when needs carry out the pressure equipment to electronic device, after stacking the electronic device in proper order, can pull the handle, make the handle drive the ring gear remove, make the ring gear can drive four gears and rotate simultaneously in rotatory in-process, when the gear drives the screw section of thick bamboo rotation, four threaded rods can drive four splint each other and be close to, make four splint effectively carry out the centre gripping spacing to electronic device, make electronic device be in electronic hydraulic stem central point all the time, can stabilize when making electronic hydraulic stem extend and driving the clamp plate and move down and carry out the pressure equipment to electronic device, make electronic device be difficult for the skew position after the pressure, can not appear dislocation and damage the condition of electronic device because of interface department atress is uneven, thereby improve the stability of pressure equipment.
2. This crimping formula power electronic device valves with pressure equipment frock through setting up splint, screw barrel, threaded rod, ring gear, handle, electronic hydraulic stem and manometer, when the electronic device to different specifications is spacing, can pull the handle and adjust the position of splint, compare in traditional mode and need not frequently to rotate the bolt, it is very convenient, fix electronic device through four directions, further improve the stability of electronic device pressure equipment, because of the top of electronic hydraulic stem is equipped with the manometer, make the slow pressurization of electronic hydraulic stem until the manometer reading just reaches the pressure equipment power size that electronic device prescribes, thereby clamp plate bottom elastic surface and electronic device contact further protect it simultaneously.
3. This crimping formula power electronic device valves with pressure equipment frock through setting up antistatic backing plate, adjusting part, the curtain, telescopic link and bearing, when carrying out the pressure equipment work to the electronic device, the antistatic backing plate of braced frame both sides can effectively adsorb certain dust and prevent that static from causing the damage to the electronic device, because of being provided with adjusting part, when the high time of need adjusting braced frame, accessible adjusting part promotes braced frame, can satisfy the pressure equipment work to the electronic device of different height, improve the suitability of this valves, because of being provided with the telescopic link, the telescopic link is fixed with the box inner wall, the threaded rod can not rotate when making the screw section of thick bamboo rotatory, effectively spacing and mutually support between through bearing and the ring gear, make splint can stabilize and carry out the clamping to the electronic device.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure of the present invention;
FIG. 2 is a schematic view of the handle of the present invention;
FIG. 3 is a schematic view of a three-dimensional structure of a ring according to the present invention;
FIG. 4 is a schematic view of a rotary assembly according to the present invention;
in the figure: 1. a bottom plate; 2. a case body; 3. a support plate; 4. a connecting plate; 5. a support frame; 6. an adjustment assembly; 7. an antistatic plate; 8. a handle; 9. a rotating assembly; 91. a gear ring; 92. an inner ring; 10. a bearing; 11. a circular ring; 12. a shaft sleeve; 13. a thread cylinder; 14. a threaded rod; 15. a clamping plate; 16. a gear; 17. a telescopic rod; 18. a top plate; 19. a pushing assembly; 191. a pressure gauge; 192. an electric hydraulic rod; 20. a sliding seat; 21. a pressing plate; 22. pulling a curtain; 23. placing the hole; 24. a through hole; 25. an anti-slip pad; 26. and a supporting block.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
As shown in fig. 1-4, the present invention provides a technical solution: the utility model provides a crimping formula power electronic device valves with pressure equipment frock, includes bottom plate 1, the upper surface of bottom plate 1 and the lower fixed surface of box body 2 are connected, the upper surface of box body 2 and the lower fixed surface of backup pad 3 are connected, the upper surface of backup pad 3 and the lower surface overlap joint of connecting plate 4, the upper surface of connecting plate 4 and the lower fixed surface of braced frame 5 are connected, the upper surface joint of bottom plate 1 has bearing 10, has cup jointed swivel assembly 9 in the bearing 10.
The top of rotating assembly 9 meshes with four gears 16 mutually, gear 16 joint is at the surface of screw thread section of thick bamboo 13, screw thread section of thick bamboo 13 cup joints in axle sleeve 12, four axle sleeves 12 evenly offer the surface at ring 11, screw thread section of thick bamboo 13 internal thread connection has threaded rod 14, through setting up four splint 15, fix electronic components through four directions, further improve the stability of electronic components pressure equipment, one end and one side fixed connection of splint 15 of threaded rod 14, the other end and the one end fixed connection of telescopic link 17 of threaded rod 14, owing to be provided with telescopic link 17, telescopic link 17 is fixed with box body 2 inner wall, threaded rod 14 can not rotate when making screw thread section of thick bamboo 13 rotatory, effectively carry out spacingly and mutually support between splint 15 through bearing 10 and ring gear 91, make splint 15 can stabilize clamping electronic components, the one end and the inner wall fixed connection of box body 2 that four telescopic link 17 kept away from each other, the one side that four splint 15 are close to each other all is provided with the rubber pad.
The upper surfaces of the supporting plate 3 and the connecting plate 4 are provided with placing holes 23, the upper surface of the supporting frame 5 is fixedly connected with the lower surface of the top plate 18, the top of the inner wall of the top plate 18 is provided with a pushing component 19, and the pushing component 19 penetrates through the top of the supporting frame 5 and is fixedly connected with the upper surface of the pressing plate 21.
Specifically, as shown in fig. 1, 2 and 4, the rotating assembly 9 includes a gear ring 91, the inner wall of the gear ring 91 is fixedly connected with the outer wall of an inner ring 92, the inner ring 92 is disposed in a bearing 10, a plurality of teeth disposed on the upper surface of the gear ring 91 are meshed with four gears 16, the front surface of the gear ring 91 is fixedly connected with one end of a handle 8, the handle 8 extends out of a box body 2, when the handle 8 is disposed, electronic devices with different specifications are limited, the handle 8 can be pulled to adjust the position of the clamping plate 15, compared with the conventional method without frequent rotation of bolts, the handle 8 is disposed in a through hole 24, the through hole 24 is disposed on the front surface of the box body 2, four corners of the upper surface of the connecting plate 4 are provided with adjusting assemblies 6, when the height of the supporting frame 5 is required to be adjusted, the supporting frame 5 can be lifted by the adjusting assemblies 6, the press mounting work of electronic devices with different heights can be satisfied, the applicability of the valve bank is improved, four adjusting components 6 are fixedly connected with the upper surface of the bottom plate 1 through the connecting plate 4 and the supporting plate 3, the top of the adjusting component 6 is provided with a limiting block, the pushing component 19 comprises an electric hydraulic rod 192, the electric hydraulic rod 192 is clamped on the upper surface of the inner wall of the top plate 18 and the upper surface of the supporting frame 5, the top of the electric hydraulic rod 192 is provided with a pressure gauge 191, the pressure gauge 191 is clamped on the upper surface of the top plate 18, by arranging the pressure gauge 191, the top of the electric hydraulic rod 192 is provided with the pressure gauge 191, the electric hydraulic rod 192 is slowly pressurized until the reading of the pressure gauge 191 just reaches the press mounting force specified by the electronic device, the bottom end of the electric hydraulic rod 192 is fixedly connected with the upper surface of the pressure plate 21, the bottom of the pressure plate 21 is an elastic contact surface, the bottom elastic surface of the pressing plate 21 is in contact with the electronic device to further protect it.
Specifically, as shown in fig. 1, the four corners of the upper surface of the bottom plate 1 are respectively provided with a supporting block 26, one ends of the four supporting blocks 26, which are close to each other, are fixedly connected with the left side surface and the right side surface of the box body 2, the left side surface and the right side surface of the supporting frame 5 are respectively provided with an antistatic plate 7, through the arrangement of the antistatic plates 7, the antistatic plates 7 on the two sides of the supporting frame 5 can effectively adsorb certain dust and prevent static from damaging electronic devices, the lower surface of the bottom plate 1 is fixedly connected with the upper surfaces of the two anti-slip pads 25, the stability of the valve bank in use is improved due to the arrangement of the anti-slip pads 25, the offset position of the valve bank is prevented, the upper surface of the inner wall of the supporting frame 5 is fixedly connected with a sliding seat 20, a pulling curtain 22 is connected in the sliding seat 20, and the internal environment of the supporting frame 5 is effectively protected through the mutual cooperation of the sliding seat 20 and the pulling curtain 22, and a large amount of dust is prevented from accumulating inside.
The method comprises the following steps:
when the electronic devices are required to be pressed and assembled, the electronic devices can be placed in the placement holes 23, after the electronic devices are stacked in sequence, the handle 8 can be pulled, the handle 8 drives the gear ring 91 to move, the gear ring 91 can drive the four gears 16 to rotate simultaneously in the rotating process, the gears 16 drive the threaded cylinders 13 to rotate, and simultaneously the four threaded rods 14 can respectively drive the four clamping plates 15 to be close to each other, so that the four clamping plates 15 can effectively clamp and limit the electronic devices, the electronic devices are always positioned in the center of the electric hydraulic rod 192, the electric hydraulic rod 192 can stably press the electronic devices when stretching and driving the pressing plate 21 to move downwards, the electronic devices are not easy to deviate from positions after being pressed, dislocation can not occur due to uneven stress at the joints, and the situation of damaging the electronic devices is avoided, and therefore the stability of the pressing is improved.
When the electronic devices with different specifications need to be limited, the handle 8 can be pulled to adjust the position of the clamping plate 15, compared with the traditional mode, the electronic device is not required to be frequently rotated, the electronic device is quite convenient to fix through four directions, the stability of the electronic device press fitting is further improved, the pressure gauge 191 is arranged at the top of the electric hydraulic rod 192, the electric hydraulic rod 192 is slowly pressurized until the reading of the pressure gauge 191 just reaches the press fitting force specified by the electronic device, and meanwhile, the elastic surface at the bottom of the pressure plate 21 is in contact with the electronic device, so that the electronic device is further protected.
When carrying out the pressure equipment work to the electronic component, the antistatic backing plate 7 of braced frame 5 both sides can effectively adsorb certain dust and prevent that static from causing the damage to the electronic component, because of being provided with adjusting part 6, when the high time of needs adjustment braced frame 5, accessible adjusting part 6 promotes braced frame 5, can satisfy the pressure equipment work to the electronic component of different height, improve the suitability of this valves, because of being provided with telescopic link 17, telescopic link 17 is fixed with box body 2 inner wall, threaded rod 14 can not rotate when making screw thread section of thick bamboo 13 rotatory, effectively spacing splint 15 and through the mutually supporting between bearing 10 and the ring gear 91, make splint 15 can stabilize and carry out the clamping to the electronic component.
The working principle of the invention is as follows: when the electronic devices are required to be pressed and assembled, the electronic devices can be placed in the placement holes 23, after the electronic devices are stacked in sequence, the handle 8 can be pulled, the handle 8 drives the gear ring 91 to move, the gear ring 91 can drive the four gears 16 to rotate simultaneously in the rotating process, the gears 16 drive the threaded cylinders 13 to rotate, the four threaded rods 14 can respectively drive the four clamping plates 15 to be close to each other, the four clamping plates 15 can effectively clamp and limit the electronic devices, the electric hydraulic rod 192 slowly pressurizes until the reading of the pressure gauge 191 just reaches the specified pressing force of the electronic devices, meanwhile, the elastic surface at the bottom of the pressure plate 21 is in contact with the electronic devices, the pressing of the electronic devices can be completed, when the electronic devices after the pressing are required to be taken out, the electric hydraulic rod 192 is controlled to be shortened, the pressure plate 21 is separated from the electronic devices, and the handle 8 is pulled reversely, and the electronic devices are pulled out of the placement holes 23.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present patent within the knowledge of one of ordinary skill in the art.
Claims (5)
1. Crimping formula power electronic device valves with pressure equipment frock, including bottom plate (1), its characterized in that: the upper surface of the bottom plate (1) is fixedly connected with the lower surface of the box body (2), the upper surface of the box body (2) is fixedly connected with the lower surface of the supporting plate (3), the upper surface of the supporting plate (3) is overlapped with the lower surface of the connecting plate (4), the upper surface of the connecting plate (4) is fixedly connected with the lower surface of the supporting frame (5), the upper surface of the bottom plate (1) is clamped with a bearing (10), and a rotating assembly (9) is sleeved in the bearing (10);
the top of the rotating assembly (9) is meshed with four gears (16), the gears (16) are clamped on the outer surface of a threaded cylinder (13), the threaded cylinder (13) is sleeved in a shaft sleeve (12), the four shaft sleeves (12) are uniformly arranged on the outer surface of a circular ring (11), a threaded rod (14) is connected with the inner threads of the threaded cylinder (13), one end of the threaded rod (14) is fixedly connected with one side of a clamping plate (15), the other end of the threaded rod (14) is fixedly connected with one end of a telescopic rod (17), one end of the four telescopic rods (17) which are far away from each other is fixedly connected with the inner wall of a box body (2), and rubber pads are arranged on one surfaces of the four clamping plates (15) which are close to each other;
the upper surfaces of the supporting plate (3) and the connecting plate (4) are provided with placing holes (23), the upper surface of the supporting frame (5) is fixedly connected with the lower surface of the top plate (18), the top of the inner wall of the top plate (18) is provided with a pushing and pressing component (19), and the pushing and pressing component (19) penetrates through the top of the supporting frame (5) and is fixedly connected with the upper surface of the pressing plate (21);
the rotating assembly (9) comprises a gear ring (91), wherein the gear ring (91) is fixedly connected with the inner wall of the gear ring (91) and the outer wall of an inner ring (92), the inner ring (92) is arranged in the bearing (10), and a plurality of teeth arranged on the upper surface of the gear ring (91) are meshed with the four gears (16);
the front face of the gear ring (91) is fixedly connected with one end of the handle (8), the handle (8) extends out of the box body (2), the handle (8) is arranged in the through hole (24), and the through hole (24) is formed in the front face of the box body (2);
the pushing assembly (19) comprises an electric hydraulic rod (192), the electric hydraulic rod (192) is clamped on the upper surface of the inner wall of the top plate (18) and the upper surface of the supporting frame (5), a pressure gauge (191) is arranged at the top of the electric hydraulic rod (192), the pressure gauge (191) is clamped on the upper surface of the top plate (18), the bottom end of the electric hydraulic rod (192) is fixedly connected with the upper surface of the pressing plate (21), and the bottom of the pressing plate (21) is an elastic contact surface.
2. The crimping power electronic valve set with press-fit tooling as claimed in claim 1, wherein: four corners of the upper surface of the connecting plate (4) are provided with adjusting components (6), the four adjusting components (6) penetrate through the connecting plate (4) and the supporting plate (3) and are fixedly connected with the upper surface of the bottom plate (1), and the top of the adjusting components (6) is provided with a limiting block.
3. The crimping power electronic valve set with press-fit tooling as claimed in claim 1, wherein: four corners of the upper surface of the bottom plate (1) are respectively provided with a supporting block (26), and one ends of the four supporting blocks (26) which are close to each other are fixedly connected with the left side surface and the right side surface of the box body (2) respectively.
4. The crimping power electronic valve set with press-fit tooling as claimed in claim 1, wherein: the left side surface and the right side surface of the supporting frame (5) are respectively provided with an antistatic plate (7), and the lower surface of the bottom plate (1) is fixedly connected with the upper surfaces of the two anti-skid pads (25).
5. The crimping power electronic valve set with press-fit tooling as claimed in claim 1, wherein: the upper surface of the inner wall of the supporting frame (5) is fixedly connected with a sliding seat (20), and a pulling curtain (22) is connected in a sliding manner in the sliding seat (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449456.6A CN113192906B (en) | 2021-04-25 | 2021-04-25 | Crimping type power electronic device valve group with press-fitting tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449456.6A CN113192906B (en) | 2021-04-25 | 2021-04-25 | Crimping type power electronic device valve group with press-fitting tool |
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| Publication Number | Publication Date |
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| CN113192906A CN113192906A (en) | 2021-07-30 |
| CN113192906B true CN113192906B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110449456.6A Active CN113192906B (en) | 2021-04-25 | 2021-04-25 | Crimping type power electronic device valve group with press-fitting tool |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114248095A (en) * | 2021-12-30 | 2022-03-29 | 徐州博丰轴承有限公司 | Device for press mounting of bearing |
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| CN111992964A (en) * | 2020-07-06 | 2020-11-27 | 大族激光科技产业集团股份有限公司 | Double-station press-fitting device |
| CN212494204U (en) * | 2020-06-08 | 2021-02-09 | 江苏圣创半导体科技有限公司 | Surface cleaning device of semiconductor wire bonding chopper |
| CN112630615A (en) * | 2020-12-10 | 2021-04-09 | 华北电力大学 | Crimping type IGBT chip dynamic characteristic experiment platform and measuring method |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2642660A1 (en) * | 2006-02-22 | 2007-09-07 | Hess Industries, Inc. | Vertical spinner |
| CN204832258U (en) * | 2015-07-28 | 2015-12-02 | 国网智能电网研究院 | High -power crimping formula IGBT encapsulation module pressure equipment test fixture |
| CN106706963A (en) * | 2015-07-28 | 2017-05-24 | 国网智能电网研究院 | Large power compression type IGBT package module press mounting test clamp |
| CN109030878A (en) * | 2018-07-23 | 2018-12-18 | 全球能源互联网研究院有限公司 | A kind of test module of hydraulic installalion structure and its composition |
| CN109244011A (en) * | 2018-09-05 | 2019-01-18 | 黄家仓 | A kind of semiconductor integrates disk production and uses annealing device |
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| CN212494204U (en) * | 2020-06-08 | 2021-02-09 | 江苏圣创半导体科技有限公司 | Surface cleaning device of semiconductor wire bonding chopper |
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| CN112630615A (en) * | 2020-12-10 | 2021-04-09 | 华北电力大学 | Crimping type IGBT chip dynamic characteristic experiment platform and measuring method |
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| CN113192906A (en) | 2021-07-30 |
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