CN2711730Y - Photoelectric recording test device for plasticity bulging controllable temperature and pressure - Google Patents
Photoelectric recording test device for plasticity bulging controllable temperature and pressure Download PDFInfo
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- CN2711730Y CN2711730Y CN 200420012116 CN200420012116U CN2711730Y CN 2711730 Y CN2711730 Y CN 2711730Y CN 200420012116 CN200420012116 CN 200420012116 CN 200420012116 U CN200420012116 U CN 200420012116U CN 2711730 Y CN2711730 Y CN 2711730Y
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- bulging
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Abstract
The utility model provide a photoelectric recording test device for plasticity bulging controllable temperature and pressure, which belongs to the instrument field of the modern and advanced manufacture. The photoelectric recording test device for plasticity bulging controllable temperature and pressure consists of an upper air intake system, a lower air intake system, a pressure former, a photoelectric record system and a monolithic-computer control system; wherein, the argon-gas purifying device is communicated with a temperature regulating system and a pressure regulating system, and a magnetic valve and a pressure sensor are both arranged in a cooling chamber. The photoelectric recording test device for plasticity bulging controllable temperature and pressure has the advantage that the photoelectric recording test device for plasticity bulging controllable temperature and pressure purifies the pressing argon gas and solves the difficult problem that the magnetic valve and the pressure sensor can not work in high temperature; in addition, the photoelectric recording test device for plasticity bulging controllable temperature and pressure increases the heat insulating capability, reduces the losses of the heat energy, and improves the operating environment for experimenters; the photoelectric recording test device for plasticity bulging controllable temperature and pressure can not only exactly control time-varying pressure and temperature according to pre-established deformation path but also can record the time-varying picture of the test piece in the bulging process.
Description
Technical field:
The utility model belongs to the modern advanced Instrument technology field of making, and specifically relates to a kind of test unit that is specially adapted to the superplastic bulging Study on laws of deformation.
Background technology:
The sheet material superplastic bulging occupies an important position in modern space flight and aviation manufacturing field, the quantitative relationship of experimental study expansive forming deformation process and temperature, pressure, to the formulation of the research of superplastic bulging rule and the forming technology means that are absolutely necessary, especially to hard fragility high-temperature material (as pottery, intermetallic compound etc.), owing to be at high temperature to experimentize, the image recording of heating, heat insulation, oxidation, pressure control, deformation process and data processing etc., so far also there are many difficult problems, need to be resolved hurrily.
Summary of the invention:
The utility model will provide a kind of pressure and temperature that can at high temperature control bulging, can write down the image that bulging spare changes again, and can also prevent the superplastic bulging test unit of high-temperature oxydation.
Above-mentioned purpose of the present utility model is achieved in that accompanying drawings is as follows:
Device of the present utility model is by last gas handling system, following gas handling system, pressure former, photoelectric measurement pen recorder and single-chip computer control system are formed, on, in the following gas handling system temperature, pressure regulating system is housed respectively, last gas handling system and following gas handling system are communicated with pressure former, the source of parallel light of photoelectric measurement pen recorder places the place ahead of pressure parallel device, Digital Video places the rear of pressure former, the input end of single-chip microcomputer respectively with the temperature, pressure regulating system in thermocouple be connected with pressure transducer, the output terminal of single-chip microcomputer is communicated with flow valve in the temperature, pressure regulating system respectively.
Last gas handling system is made up of argon bottle 1, main valve 2, reduction valve 3, electromagnetic voltage adjusting valve 4, purifying argon device 5, temperature, pressure regulating system 6 and draft tube 8, and is communicated with last atmospheric pressure cavity 9.
Following gas handling system is made up of argon bottle 46, main valve 45, reduction valve 44, electromagnetic voltage adjusting valve 43, purifying argon device 41, temperature, pressure regulating system 42 and draft tube 40, and is communicated with following atmospheric pressure cavity 37.
Purifying argon device is by resistance furnace (50), spiral cold-finger (52), clarifier (53), condensate water water receiver (54) and draining valve (55) are formed, resistance furnace (50) one ends and electromagnetic voltage adjusting valve (4,43) connect, the other end is communicated with spiral cold-finger (52), resistance furnace (50) be furnished with thermocouple (49) and temperature controller (47) place condenser chamber (51) spiral cold-finger (52) three mouths of pipe respectively with resistance furnace (50), the upper end of clarifier (53) and condensate water water receiver (54) is communicated with, the lower end of condensate water water receiver (54) is communicated with draining valve (55), clarifier (53) other end and temperature, pressure regulating system (6,42) is communicated with.
Pressure former is by upper mould fixed plate (19), following flanging mould back-up block (25), following flanging tube back-up block (26), glass (12) and quartz glass (13,14) form, have the pipeline of vacuum-pumping tube (10) and draft tube (8) on the upper mould fixed plate (19), quartz glass (14) is affixed with upper mould fixed plate (19) and following flanging mould back-up block (25), quartz glass (13) and glass (12) are affixed with upper mould fixed plate (19) and following flanging tube back-up block (26), and are vacuum-sealed cavity between quartz glass (13) and the glass (12).
Temperature, pressure regulating system (6,42) by Medium Frequency Induction Heating Furnace (56), temperature, pressure-detecting device (61), vacuum pump (64), chilled water water receiver (70), flow valve (60,67,68), solenoid directional control valve (63) and cooling chamber (72) are formed, Medium Frequency Induction Heating Furnace (56) is by flow valve (60) and temperature, pressure-detecting device (61) is communicated with, temperature, pressure-detecting device (61) is divided into three the tunnel: the one tunnel again and is communicated with flow valve (68), flow valve (68) is communicated with gas outlet 69, one the tunnel is communicated with pressure chamber (66), pressure chamber (66) is communicated with flow valve (67), flow valve (67) and purifying argon device (5,41) be communicated with, one the tunnel is communicated with draft tube (8,40); The recycling outlet (71) of Medium Frequency Induction Heating Furnace (56) is communicated with chilled water water receiver (70), and chilled water is communicated with Medium Frequency Induction Heating Furnace (56) through circulating water inlet (74) by water circulating pump (73); Medium Frequency Induction Heating Furnace (56) is communicated with clarifier (53); Vacuum pump (64) is communicated with solenoid directional control valve (63), and solenoid directional control valve (63) is communicated with vacuum-pumping tube (10,39); Thermocouple (57) places Medium Frequency Induction Heating Furnace (56); Thermocouple (62) places temperature, pressure-detecting device (61), and pressure transducer (65) places pressure chamber (66); Solenoid directional control valve (63), pressure chamber (66), flow valve (60,67,68), chilled water water receiver (70) they are to place cooling chamber (72).
PERD is made up of source of parallel light (7), last atmospheric pressure cavity (9) and Digital Video (24), and source of parallel light places right-hand or the place ahead of atmospheric pressure cavity (9), and Digital Video (24) places the left or the rear of atmospheric pressure cavity (9).
Purifying argon device is made up of resistance furnace 50, spiral cold-finger 52, clarifier 53, condensate water water receiver 54 and draining valve 55, resistance furnace 50 1 ends and electromagnetic voltage adjusting valve 4,43 are communicated with, the other end is communicated with spiral cold-finger 52, resistance furnace 50 is furnished with thermocouple 49 and temperature controller 47, place three mouths of pipe of the spiral cold-finger 52 of condenser chamber 51 to be communicated with the upper end of resistance furnace 50, clarifier 53 and condensate water water receiver 54 respectively, the lower end of condensate water water receiver 54 is communicated with draining valve 55, the other end of clarifier 53 and temperature, pressure regulating system 6,42 are communicated with.
The printing opacity building mortion of flanging and mould installing is by upper mould fixed plate 19, following flanging mould back-up block 25, following flanging tube back-up block 26, glass 12 and quartz glass 13,14 are formed, and have vacuum lead 10 on the upper mould fixed plate 19, admission line 8, quartz glass 14 is affixed with upper mould fixed plate 19 and following flanging mould back-up block 25, and quartz glass 13 and glass 12 are affixed with upper mould fixed plate 19 and following flanging tube back-up block 26, and are vacuum-sealed cavity between quartz glass 13 and the glass 12.
Temperature, pressure regulating system 6,42 by Medium Frequency Induction Heating Furnace 56, temperature, pressure-detecting device 61, vacuum pump 64, chilled water water receiver 70, solenoid directional control valve 63, flow valve 60,67,68, cooling chamber is formed, Medium Frequency Induction Heating Furnace 56 is by flow valve 60 and temperature, pressure-detecting device 61 is communicated with, temperature, pressure-detecting device 61 is divided into three the tunnel: the one tunnel again and is communicated with flow valve 68, flow valve 68 is communicated with gas outlet 69, one the tunnel is communicated with pressure chamber 66, pressure chamber 66 is communicated with flow valve 67 again, and flow valve 67 is communicated with purifying argon device 5,41, one the tunnel is communicated with draft tube 8,40; The recycling outlet 71 of Medium Frequency Induction Heating Furnace 56 is communicated with chilled water water receiver 70, and chilled water is communicated with Medium Frequency Induction Heating Furnace 56 through circulating water inlet 74 by water circulating pump 73; Medium Frequency Induction Heating Furnace 56 is communicated with clarifier 53; Vacuum pump 64 is communicated with solenoid directional control valve 63, and solenoid directional control valve 63 is communicated with vacuum-pumping tube 10,39; Thermocouple 57 places Medium Frequency Induction Heating Furnace 56; Thermocouple 62 places temperature, pressure-detecting device 61; Pressure transducer 65 places pressure chamber 66; Solenoid directional control valve 63, pressure chamber 66, flow valve 60,67,68, chilled water water receiver 70 all places cooling chamber 72.
PERD is made up of source of parallel light 7, last atmospheric pressure cavity 9 and Digital Video 24, and source of parallel light places right-hand or the place ahead of atmospheric pressure cavity 9, and Digital Video 24 places the left or the rear of atmospheric pressure cavity 9.
The beneficial effects of the utility model are:
1. utilize the just available test unit of the present utility model of common hydropress to carry out superplastic bulging.
2. in the protection of the argon gas that has purified with exert pressure down, high-temperature oxydation can be prevented, bulging can be carried out again.
3. solved the difficult problem that solenoid valve and pressure transducer can not be worked under high-temperature condition, and can press predefined deformation path, accurately controlled pressure and temperature are over time.
4. can write down in the bulging process specimen shape with the variation of pressure, temperature and time.
5. because upper and lower atmospheric pressure cavity has been implemented vacuum heat-insulation,, changed the working environment of testing crew so reduced heat energy loss.
Description of drawings:
Fig. 1 is that the photoelectric recording experimental provision of blanket gas expansive forming controllable temperature, pressure is always schemed
Fig. 2 is purifying argon device figure
Fig. 3 is temperature, pressure regulating system figure
Fig. 4 is a flanging building mortion structural front view
Fig. 5 is that the A-A of Fig. 4 is to view
Fig. 6 is that the B-B of Fig. 4 is to view
：1. 2. 3. 4. 5. 6.、 7. 8. 9. 10. 11. 12.13. 14. 15. 16. 17. 18.19. 20. 21. 22. 23.24. 25. 26. 27. 28. 29. 30. 31. 32. 33.34. 35. 36. 37. 38.PC 39. 40. 41. 42.、 43. 44. 45.46. 47. 48. 49. 50. 51. 52.53. 54. 55. 56. 57. 58. 59. 60. 61.、 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74.
Embodiment
Further specify the structure and the embodiment thereof of the utility model patent below in conjunction with accompanying drawing:
The opto-electrical recording test fixture of a kind of blanket gas superplastic bulging controllable temperature, pressure, argon gas in the argon bottle 1 is by main valve 2, reduction valve 3, electromagnetic voltage adjusting valve 4 enters purifying argon device 5, the argon gas that is come out by purifying argon device 5 enters temperature, pressure regulating system 6 again, and the argon gas that is come out by temperature, pressure regulating system 6 enters atmospheric pressure cavity 9 by draft tube 8; Argon gas in the argon bottle 46 is by main valve 45, reduction valve 44, electromagnetic voltage adjusting valve 43 enters purifying argon device 41, and the argon gas that is come out by purifying argon device 41 enters temperature, pressure regulating system 42 again, and the argon gas that is come out by temperature, pressure regulating system 42 enters down atmospheric pressure cavity 37.
Purifying argon device 5,41st, by resistance furnace 50, spiral cold-finger 52, clarifier 53, condense water receiver 54 and draining valve 55 are formed; Resistance furnace 50 is by resistance 48 heating, the power lead of resistance 48 is to link to each other with temperature controller 47, the temperature of resistance furnace 50 is to measure with thermocouple 49, and by temperature controller 47 controls, spiral cold-finger 52 places cooling chamber 51, spiral cold-finger 52 is communicated with condensate water water receiver 54 again, and the lower end of condensate water water receiver 54 links to each other with draining valve 55; By electromagnetic voltage adjusting valve 4, after heating, 43 argon gas that enter resistance furnace are divided into two-way through spiral cold-finger 52 again, one the tunnel is to become the steam coagulation in the argon gas water to flow in the condensate water water receiver 54, and another road is to enter temperature, pressure regulating system 6,42 behind the impurity that clarifier 53 filters in the argon gas.
Temperature, pressure regulating system 6,42 are by Medium Frequency Induction Heating Furnace 56, temperature, pressure-detecting device 61, and cooling chamber 72 and vacuum pump 64 are formed, and the temperature of Medium Frequency Induction Heating Furnace 56 is to be measured by thermocouple 57; The circulating water outlet pipe 71 of Medium Frequency Induction Heating Furnace 56 is communicated with chilled water water receiver 70, and water circulating pump 73 pumps into the water of chilled water water storage 70 water-cooling system of Medium Frequency Induction Heating Furnace 56 by circulating water inlet 74; The temperature of temperature, pressure-detecting device 61 is detected by the thermocouple 62 that is placed in one; Temperature, pressure-detecting device 61 are communicated with pressure chamber 66, and pressure chamber 66 is communicated with flow valve 67, and the pressure of temperature, pressure-detecting device 61 is to detect by the pressure sensing 65 that places pressure chamber 66; Temperature, pressure-detecting device 61 are communicated with flow valve 68, and flow valve 68 is communicated with drainpipe 69; Vacuum pump 64 is communicated with solenoid directional control valve 63, and solenoid directional control valve 63 is communicated with vacuum-pumping tube 39,10; Solenoid directional control valve 63, pressure chamber 66, flow valve 60,67,68, chilled water water receiver 70 all place cooling chamber 72, and the structure of cooling chamber 72 is similar to the refrigerating chamber of refrigerator.
Flanging tube and flanging mode configuration are by upper mould fixed plate 19, following flanging mould back-up block 25, following flanging tube back-up block 26, glass 12 and quartz glass 13,14 form, have the pipeline of vacuum-pumping tube 10 and draft tube 8 on upper mould fixed plate 19, quartz glass 14 is to be bonded in upper mould fixed plate 19 and following flanging mould back-up block 25 groove all around with high-temp glue; Quartz glass 13 is to be bonded in upper mould fixed plate 19 and following flanging tube back-up block 26 groove all around with high-temp glue, glass 12 is to be bonded in upper mould fixed plate 19 and following flanging tube back-up block 26 groove all around with high-temp glue, and forming sealed cavity between quartz glass 13 and the glass 12, sealed cavity is pumped into vacuum again.
Last cooled plate 15 is that inside is provided with the grid chamber, and the chilled water loop structure that is welded into by steel plate; Last vacuum heat-insulation backing plate 16 and following vacuum heat-insulation backing plate 33 are that the grid chamber is established in inside, and the hermetically-sealed construction that is welded into by steel plate, and the gas in the structure is pumped into vacuum.
Last cooled plate 15, last vacuum heat-insulation backing plate 16, last heating plate 18 and upper mould fixed plate 19 are to use gib screw 22 to be fastened on the pressing machine top shoe 11; Following heating plate 32 and following vacuum heat-insulation backing plate 33 are to be fastened on the pressing machine lower table 34 with following gib screw 27; Silicon carbon rod 17 is to be contained in the circular hole of heating plate 18, and silicon carbon rod 31 is to be contained in down in the circular hole of heating plate 32.
Single-chip computer control system is by single-chip microcomputer 35, thermocouple 23,36 and pressure transducer 65 are formed, the information of the temperature information of thermocouple 62 and pressure transducer 65 is imported single-chip microcomputer 35 into, and single-chip microcomputer 35 is realized control function with control signal afferent stream metered valve 60,67,68.
PERD is made up of source of parallel light 7 and Digital Video 24, the directional light that source of parallel light 7 is sent, see through glass 12 and quartz glass 13,14 and inject Digital Video 24, Digital Video 24 has just write down bulging spare in bulging process shape information over time, and it is reached the PC computing machine carries out data processing.
Before the experiment, open the switch and the solenoid directional control valve 63 of vacuum pump 64, successively the air of last atmospheric pressure cavity 9 and following atmospheric pressure cavity 37 is pumped, just can carry out the adjustment process of gas pressure compacting and temperature, pressure: when the temperature of thermocouple 62 detected temperatures, pressure adjustment assembly 61 is higher than design temperature, transfer large-capacity valve 67 and 68, make the pressure of the pressure transducer 65 of pressure chamber 66 keep setting value; When the temperature of thermocouple 62 detected temperatures, pressure adjustment assembly 61 is lower than design temperature, then transfer large-capacity valve 60, turn flow valve 67 down, regulate flow valve 68 simultaneously, make the pressure of pressure chamber keep setting value; When the pressure of pressure transducer detected pressures chambers 66 65 is higher than setup pressure value, transfer large-capacity valve 68, regulate flow valve 60 and 67 simultaneously, make the temperature of thermocouple 62 keep setting value; When the pressure of pressure transducer 65 detection forming cavity is lower than setup pressure value, transfer large-capacity valve 67 and 60, regulate flow valve 60 and 68 simultaneously, make the temperature of thermocouple 62 keep setting value.
Claims (6)
1. blanket gas superplastic bulging controllable temperature; the opto-electrical recording test fixture of pressure; it is characterized in that it is by last gas handling system; following gas handling system; pressure former; photoelectric measurement pen recorder and single-chip computer control system are formed; the temperature, pressure regulating system is housed respectively in the gas handling system up and down; last gas handling system and following gas handling system are communicated with pressure former; the source of parallel light of photoelectric measurement pen recorder places the place ahead of pressure parallel device; Digital Video places the rear of pressure former; the input end of single-chip microcomputer respectively with the temperature, pressure regulating system in thermocouple be connected with pressure transducer, the output terminal of single-chip microcomputer is communicated with flow valve in the temperature, pressure regulating system respectively.
2. press the opto-electrical recording test fixture of the described blanket gas superplastic bulging of claim 1 controllable temperature, pressure; it is characterized in that described upper and lower gas handling system is respectively by argon bottle (1; 46) with its main valve that is connected according to this (2; 45), reduction valve (3; 44), the electromagnetic voltage adjusting valve (4; 43), purifying argon device (5; 41), the temperature, pressure regulating system (6; 42) and draft tube (8; 40) form, and be communicated with last atmospheric pressure cavity (9) and following atmospheric pressure cavity (37) in the pressure former respectively.
3. by the described blanket gas superplastic bulging of claim 2 controllable temperature; the opto-electrical recording test fixture of pressure; it is characterized in that described purifying argon device is by resistance furnace (50); spiral cold-finger (52); clarifier (53); condensate water water receiver (54) and draining valve (55) are formed; resistance furnace (50) one ends and electromagnetic voltage adjusting valve (4; 43) connect; the other end is communicated with spiral cold-finger (52); resistance furnace (50) is furnished with thermocouple (49) and temperature controller (47); place condenser chamber (51) spiral cold-finger (52) three mouths of pipe respectively with resistance furnace (50); the upper end of clarifier (53) and condensate water water receiver (54) is communicated with; the lower end of condensate water water receiver (54) is communicated with draining valve (55); clarifier (53) other end and temperature; pressure regulating system (6,42) is communicated with.
4. by the described blanket gas superplastic bulging of claim 1 controllable temperature; the opto-electrical recording test fixture of pressure; it is characterized in that described pressure former is by upper mould fixed plate (19); following flanging mould back-up block (25); following flanging tube back-up block (26); glass (12) and quartz glass (13; 14) form; have the pipeline of vacuum-pumping tube (10) and draft tube (8) on the upper mould fixed plate (19); quartz glass (14) is affixed with upper mould fixed plate (19) and following flanging mould back-up block (25); quartz glass (13) and glass (12) are affixed with upper mould fixed plate (19) and following flanging tube back-up block (26), and are vacuum-sealed cavity between quartz glass (13) and the glass (12).
5. by the described blanket gas superplastic bulging of claim 2 controllable temperature, the opto-electrical recording test fixture of pressure, it is characterized in that described temperature, pressure regulating system (6,42) by Medium Frequency Induction Heating Furnace (56), temperature, pressure-detecting device (61), vacuum pump (64), chilled water water receiver (70), flow valve (60,67,68), solenoid directional control valve (63) and cooling chamber (72) are formed, Medium Frequency Induction Heating Furnace (56) is by flow valve (60) and temperature, pressure-detecting device (61) is communicated with, temperature, pressure-detecting device (61) is divided into three the tunnel: the one tunnel again and is communicated with flow valve (68), flow valve (68) is communicated with gas outlet 69, one the tunnel is communicated with pressure chamber (66), pressure chamber (66) is communicated with flow valve (67), flow valve (67) and purifying argon device (5,41) be communicated with, one the tunnel is communicated with draft tube (8,40); The recycling outlet (71) of Medium Frequency Induction Heating Furnace (56) is communicated with chilled water water receiver (70), and chilled water is communicated with Medium Frequency Induction Heating Furnace (56) through circulating water inlet (74) by water circulating pump (73); Medium Frequency Induction Heating Furnace (56) is communicated with clarifier (53); Vacuum pump (64) is communicated with solenoid directional control valve (63), and solenoid directional control valve (63) is communicated with vacuum-pumping tube (10,39); Thermocouple (57) places Medium Frequency Induction Heating Furnace (56); Thermocouple (62) places temperature, pressure-detecting device (61), and pressure transducer (65) places pressure chamber (66); Solenoid directional control valve (63), pressure chamber (66), flow valve (60,67,68), chilled water water receiver (70) they are to place cooling chamber (72).
6. press the opto-electrical recording test fixture of the described blanket gas superplastic bulging of claim 1 controllable temperature, pressure; it is characterized in that described PERD by source of parallel light (7), go up atmospheric pressure cavity (9) and Digital Video (24) is formed; source of parallel light places right-hand or the place ahead of atmospheric pressure cavity (9), and Digital Video (24) places the left or the rear of atmospheric pressure cavity (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012116 CN2711730Y (en) | 2004-06-22 | 2004-06-22 | Photoelectric recording test device for plasticity bulging controllable temperature and pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012116 CN2711730Y (en) | 2004-06-22 | 2004-06-22 | Photoelectric recording test device for plasticity bulging controllable temperature and pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711730Y true CN2711730Y (en) | 2005-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420012116 Expired - Lifetime CN2711730Y (en) | 2004-06-22 | 2004-06-22 | Photoelectric recording test device for plasticity bulging controllable temperature and pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711730Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317554C (en) * | 2004-06-22 | 2007-05-23 | 吉林大学 | Photoelectric recording test apparatus for protective gas superplastic bulge controlled temperature and pressure |
| CN109807249A (en) * | 2019-01-25 | 2019-05-28 | 西安理工大学 | A kind of composite bimetal pipe expanded joint molded test device |
-
2004
- 2004-06-22 CN CN 200420012116 patent/CN2711730Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317554C (en) * | 2004-06-22 | 2007-05-23 | 吉林大学 | Photoelectric recording test apparatus for protective gas superplastic bulge controlled temperature and pressure |
| CN109807249A (en) * | 2019-01-25 | 2019-05-28 | 西安理工大学 | A kind of composite bimetal pipe expanded joint molded test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |