CN201151010Y - Device for adjusting superpose amount of trimming disk shears - Google Patents
Device for adjusting superpose amount of trimming disk shears Download PDFInfo
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- CN201151010Y CN201151010Y CNU2008200282489U CN200820028248U CN201151010Y CN 201151010 Y CN201151010 Y CN 201151010Y CN U2008200282489 U CNU2008200282489 U CN U2008200282489U CN 200820028248 U CN200820028248 U CN 200820028248U CN 201151010 Y CN201151010 Y CN 201151010Y
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Abstract
The utility model belongs to the technical field of finishing equipment in metallurgical industry, in particular to an overlap amount regulating device for a selvedge trimming rotary cutter, which is used in a metal plate strip finishing operating line. The utility model is characterized in that an output shaft on one end of a gear wheel motor (8) is connected with an absolute value encoder (9), and the output shaft on the other end of the gear wheel motor (8) is connected with a drive gear wheel (6) through a torque boundary member (7), the drive gear wheel (6) is meshed with a lower eccentric main gear wheel (5),a lower eccentric side gear wheel (10) is buckled on the geometrical center shaft of the lower eccentric main gear wheel (5), and a lower eccentric side gear wheel (10) is led to have the same center and the same shaft with the lower eccentric main gear wheel (5), and the lower eccentric side gear wheel (10) has the same module and the same tooth with the lower eccentric main gear wheel (5), and the lower eccentric side gear wheel (10) and the lower eccentric main gear wheel (5) are mutually dislocated, an upper eccentric gear wheel (11) is buckled with an upper knife shaft component through a screw, and the lower eccentric main gear wheel (5) is buckled with a lower knife shaft component through a screw. The utility model has the advantages of simple initial adjustment, excellent repeatability of processing technique and high setting accuracy.
Description
Technical field
The utility model belongs to the finishing equipment field of metallurgy industry, particularly is used for cut edge circle shear overlying quantity adjusting device in the metal plate and belt finishing line.
Background technology
Cut edge circle shear is one of key nucleus equipment that is widely used in metal plate and belt finishing line (units such as rewinding, slitting, straightening, pickling).Practice shows, influencing the circle shear shearing quality (as strokes end face and does not have burr after batching, upper and lower surface is stroked the feel basically identical, no impression etc.) with one of key factor of band sideslip uniformity that to be circle shear fore side body adjust with transmission side body lap, the i.e. problem of lap adjustment precision.The high accuracy cut edge circle shear overlying quantity adjust precision (as one-sided lap precision be controlled at ± 0.03mm in, wherein machinery adjust required precision and be controlled at ± 0.02mm in, can effectively reduce the generation of burr, crotch or deviation phenomenon) with the science of the reasonability of Machine Design reasonability, device structure reasonability, tolerance distribution reasonability, manufacture accuracy and technology, assembly method and relevant with electrical control precision etc.The processing technology that the utility model proposed, the particularly science of eccentric bushing processing technology, unique eccentric gear structure, the eccentric bushing assembly technology of science and assembly technology of eccentric gear etc. can effectively solve the adjustment precision problem of the lap of high accuracy cut edge circle shear.And processing technology and assembly technology just our country do not have now grasp.
Summary of the invention
The purpose of this utility model provides a kind of cut edge circle shear overlying quantity adjusting device, and its initial adjustment is simple, the processing technology good reproducibility, adjust the precision height.
The purpose of this utility model is to realize like this, design a kind of cut edge circle shear overlying quantity adjusting device, this device comprise at least down eccentric master gear 5, driving gear 6, torque limiter 7, motor 8, absolute value encoder 9, down eccentric pinion 10, go up eccentric gear 11 and cutter shaft assembly up and down, it is characterized in that: one of gear motor 8 brings out axle and is connected with absolute value encoder 9, and torque limiter 7 links together the other end shaft of gear motor 8 and driving gear 6; Driving gear 6 and down eccentric master gear 5 engagements, eccentric pinion 10 puts together on down on the geometrical central axis of eccentric master gear 5 down, make down eccentric pinion 10 and following eccentric master gear 5 concentric co-axial, following eccentric pinion 10 and following eccentric master gear 5 isotype same teeth, mutual dislocation; Last eccentric gear 11 is combined and installed by screw and upper slitter shaft assembly; Eccentric master gear 5 is combined and installed by screw and following cutter shaft assembly down.
Described upper slitter shaft assembly comprises eccentric bushing 1, last cutter shaft 2, frame 12, cylinder blade 13, preceding support cylinder bearing 14, back support cylinder bearing 15 and end face bearing 16; Last eccentric gear 11 is by the screw and last eccentric bushing 1 outside that puts together in the upper slitter shaft assembly, last cutter shaft 2 is installed in the eccentric bushing 1 with 16 supportings of end face bearing by preceding support cylinder bearing 14, back support cylinder axle 15, and last cutter shaft 2 outer ends are equipped with cylinder blade 13; Last eccentric bushing 1 with cylindrical centering is assemblied in the upper spider hole of frame 12.
Described cutter shaft assembly down comprises cutter shaft 3, following eccentric bushing 4, frame 12, cylinder blade 13, preceding support cylinder bearing 14, back support cylinder bearing 15 and end face bearing 16 down; Down eccentric master gear 5 puts together on down following eccentric bushing 4 outsides in the cutter shaft assembly by screw, following cutter shaft 3 is installed in down in the eccentric bushing 4 with 16 supportings of end face bearing by the preceding support cylinder bearing 14 in the following cutter shaft assembly, back support cylinder bearing 15, and following cutter shaft 3 outer ends are equipped with cylinder blade 13; Following eccentric bushing 4 with cylindrical centering is assemblied in the lower bearing bracket hole of frame 12.
Described down eccentric pinion 10 and following eccentric master gear 5 the two mutual dislocation amount are in 0.25mm.
The utility model has the advantages that: because down eccentric pinion 10 and following eccentric master gear 5 isotype same teeth, mutual dislocation, when making down eccentric pinion 10 and eccentric master gear 5 and last eccentric gear 11 meshing down, thoroughly eliminated owing to the influence of the backlash between the upper and lower eccentric gear, and the adjustment precision of lap has been improved more than the 0.01mm at least lap adjustment precision.And cut edge circle shear off-centre of eccentric bushing 1 and following eccentric bushing 4 on the integral installation timing is guaranteed accurately is positioned at 90 ° of initial phase places; Last eccentric gear 11 usefulness screws are put together on the outer end of going up eccentric bushing 1 in the upper slitter shaft assembly, and the teeth groove center line of eccentric gear 11 overlaps with the consistent of eccentric line in the affirmation, will go up eccentric gear 11 simultaneously and position processing with last eccentric bushing 1 usefulness alignment pin; Down eccentric master gear 5 usefulness screws put together on down in the cutter shaft assembly outer end of eccentric bushing 4 down, and the tooth top center line of confirming eccentric master gear 5 down is consistent corresponding with the eccentric line of following eccentric bushing 4; Down eccentric master gear 5 is also tight with the tooth lateralization of last eccentric gear 11, be about to the opposite side that backlash is eliminated a pair of intermeshing involute profile, will descend eccentric master gear 5 to position processing simultaneously with following eccentric bushing 4 usefulness alignment pins; Following eccentric pinion 10 usefulness screws are put together on the gear shaft with its how much concentric following eccentric master gears 5 that are connected; The opposite side and tightly of flank of eccentric gear 11 will make progress with the involute profile of eccentric pinion 10 under the same teeth groove that is positioned at eccentric gear 11 of following eccentric master gear 5; To descend eccentric pinion 10 and following eccentric master gear 5 usefulness alignment pins to position processing at last, under the situation that guarantees above-mentioned assembly precision, again because driving gear 6 and the following backlash between the eccentric master gear 5 meet linear relationship for the size of the idle stroke of gear motor when direction of rotation changes, therefore can directly measure backlash between driving gear 6 and the following eccentric master gear 5 by electric control system being compensated the purpose that can reach accurate control lap adjustment.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
Fig. 1 is the principle schematic of circle shear overlying quantity guiding mechanism;
Fig. 2 is the upper slitter shaft assembly figure among Fig. 1;
Fig. 3 is the following cutter shaft component drawings among Fig. 1;
Fig. 4 goes up eccentric gear and following eccentric master gear drive connection figure;
Fig. 5 goes up eccentric gear and following eccentric pinion drive connection figure;
Fig. 6 is the connection relation figure of following eccentric master gear and pinion;
Fig. 7 is upper and lower eccentric bushing building block principle schematic diagram.
Among the figure: 1, go up eccentric bushing; 2, go up cutter shaft; 3, following cutter shaft; 4, following eccentric bushing; 5, following eccentric master gear; 6, driving gear; 7, torque limiter; 8, gear motor; 9, absolute value encoder; 10, following eccentric pinion; 11, go up eccentric gear; 12, frame; 13, cylinder blade; 14, preceding support cylinder bearing; 15, back support cylinder bearing; 16, end face bearing.
The specific embodiment
As Fig. 1 is the principle schematic of circle shear overlying quantity guiding mechanism, and the mode that the lap adjustment is more generally adopted is the eccentric bushing structure.One of gear motor 8 brings out axle absolute value encoder 9 is installed, and is used for output gear revolution angle value.Torque limiter 7 links together the other end shaft of gear motor 8 and driving gear 6, realizes the transmission of power.Driving gear 6 and down eccentric master gear 5 engagements, following eccentric pinion 10 is installed in down on the geometrical central axis of eccentric master gear 5, promptly will descend eccentric pinion 10 to put together on down on the geometrical central axis of eccentric master gear 5 with screw.Down eccentric pinion 10 is with the opposing flank while and the last eccentric gear 11 of eccentric master gear 5 mesh down.Last eccentric gear 11 is combined and installed by screw and upper slitter shaft assembly; Eccentric master gear 5 is combined and installed by screw and following cutter shaft assembly down.
As shown in Figure 2, provide upper slitter shaft assembly figure among Fig. 1; The upper slitter shaft assembly comprises eccentric bushing 1, last cutter shaft 2, frame 12, cylinder blade 13, preceding support cylinder bearing 14, back support cylinder bearing 15 and end face bearing 16.As can be seen from the figure go up eccentric gear 11 by the screw and last eccentric bushing 1 outside that puts together in the upper slitter shaft assembly, last cutter shaft 2 is installed in the eccentric bushing 1 with 16 supportings of end face bearing by preceding support cylinder bearing 14, back support cylinder bearing 15, and last cutter shaft 2 outer ends are equipped with cylinder blade 13.Last eccentric bushing 1 with cylindrical centering is assemblied in the upper spider hole of frame 12.
As shown in Figure 3, provide following cutter shaft component drawings among Fig. 1; Following cutter shaft assembly comprises cutter shaft 3, following eccentric bushing 4, frame 12, cylinder blade 13, preceding support cylinder bearing 14, back support cylinder bearing 15 and end face bearing 16 down.Equally as can be seen from the figure down eccentric master gear 5 puts together on down following eccentric bushing 4 outsides in the cutter shaft assembly by screw, following cutter shaft 3 is installed in down in the eccentric bushing 4 with 16 supportings of end face bearing by the preceding support cylinder bearing 14 in the following cutter shaft assembly, back support cylinder bearing 15, and following cutter shaft 3 outer ends are equipped with cylinder blade 13.Following eccentric bushing 4 with cylindrical centering is assemblied in the lower bearing bracket hole of frame 12.
When lap is adjusted, gear motor 8 rotates forward or backwards, the axle center of upper and lower cutter shaft is respectively with the cylindrical center of upper and lower eccentric bushing, and the rotation of doing with the center of the two eccentric bushing cylindrical lines of centres forward or backwards perpendicular to the straight line symmetry of this line, reach and adjust the purpose that goes up cutter shaft 2 and following cutter shaft 3 centre-to-centre spacing, so also just adjusted the lap of two blades.
Be to go up eccentric gear and following eccentric master gear drive connection figure as shown in Figure 4; Be to go up eccentric gear and following eccentric pinion drive connection figure as shown in Figure 5; Eccentric bushing 1 and the assembling of following eccentric bushing 4 in frame 12 upper and lower holes on cut edge circle shear is at first carried out according to Figure 11 when assembling, and guarantee that the off-centre that goes up eccentric bushing 1 and following eccentric bushing 4 accurately is positioned at 90 ° of initial phase places.Last eccentric gear 11 usefulness screws are put together on the outer end of going up eccentric bushing 1 in the upper slitter shaft assembly, and the teeth groove center line of eccentric gear 11 overlaps with the consistent of eccentric line in the affirmation, will go up eccentric gear 11 simultaneously and position processing with last eccentric bushing 1 usefulness alignment pin; Down eccentric master gear 5 usefulness screws put together on down in the cutter shaft assembly outer end of eccentric bushing 4 down, and the tooth top center line of confirming eccentric master gear 5 down is consistent corresponding with the eccentric line of following eccentric bushing 4.Down eccentric master gear 5 is also tight with the tooth lateralization of last eccentric gear 11, be about to the opposite side that backlash is eliminated a pair of intermeshing involute profile, will descend eccentric master gear 5 to position processing simultaneously with following eccentric bushing 4 usefulness alignment pins.
The connection relation figure of eccentric master gear and pinion under being as shown in Figure 6; Following eccentric gear is adopted unique positive and negative gear structure, and purpose is the intermeshing backlash between the eccentric gear up and down of effective elimination when assembling.Following eccentric pinion 10 usefulness screws are put together on the gear shaft with its how much concentric following eccentric master gears 5 that are connected.The opposite side and tightly of flank of eccentric gear 11 will make progress with the involute profile of eccentric pinion 10 under the same teeth groove that is positioned at eccentric gear 11 of following eccentric master gear 5; To descend eccentric pinion 10 and following eccentric master gear 5 usefulness alignment pins to position processing at last.
The following eccentric master gear as shown in Figure 6 and the connection relation of pinion can guarantee that eccentric gear is zero sideshake engaged transmission up and down when rotating.
Because up and down the backlash between the eccentric gear is a non-linear relation to the influence of lap, still there is not the explicit mathematical relational expression can describe relation between the two at present.By following eccentric gear is carried out architecture advances, thoroughly eliminated owing to the influence of the backlash between the upper and lower eccentric gear, and the adjustment precision of lap has been improved more than the 0.01mm at least lap adjustment precision.Under the situation that guarantees assembly precision, because the backlash between driving gear 6 and the following eccentric master gear 5 meets linear relationship for the size of the idle stroke of gear motor when direction of rotation changes, the backlash that therefore can directly measure between driving gear 6 and the following eccentric master gear 5 can reach the purpose that accurate control lap is adjusted by electric control system is compensated.
As Fig. 7 and Fig. 8 is the structural representation of going up eccentric bushing 1 and following eccentric bushing 4, the adjustment precision of lap and the accuracy of manufacture of eccentric bushing are closely related, when the engineering design of carrying out eccentric bushing and manufacturing, the axiality that the cylindrical bearing hole is installed in the front and back of eccentric bushing must guarantee within the specific limits; The manufacture deviation control of eccentric amount e within the specific limits; The end face run-out of the end face of the front/rear end of eccentric bushing and installation cylindrical bearing must be controlled within the specific limits; The surfaces of revolution of eccentric bushing must be controlled within the specific limits with the axiality that the cylindrical bearing hole is installed; The fit clearance in eccentric bushing and frame hole must be controlled in the reasonable scope; The surface smoothness control of the mating surface in the surfaces of revolution of eccentric bushing and frame hole within the specific limits.
Eccentric bushing 1 and the assembling of following eccentric bushing 4 in frame 12 upper and lower holes on cut edge circle shear is at first carried out when assembling, and guarantee that the off-centre that goes up eccentric bushing 1 and following eccentric bushing 4 accurately is positioned at 90 ° of initial phase places; Last eccentric gear 11 usefulness screws are put together on the outer end of going up eccentric bushing 1 in the upper slitter shaft assembly, and the teeth groove center line of eccentric gear 11 overlaps with the consistent of eccentric line in the affirmation, will go up eccentric gear 11 simultaneously and position processing with last eccentric bushing 1 usefulness alignment pin; Down eccentric master gear 5 usefulness screws put together on down in the cutter shaft assembly outer end of eccentric bushing 4 down, and the tooth top center line of confirming eccentric master gear 5 down is consistent corresponding with the eccentric line of following eccentric bushing 4; Down eccentric master gear 5 is also tight with the tooth lateralization of last eccentric gear 11, be about to the opposite side that backlash is eliminated a pair of intermeshing involute profile, will descend eccentric master gear 5 to position processing simultaneously with following eccentric bushing 4 usefulness alignment pins; Following eccentric pinion 10 usefulness screws are put together on the gear shaft with its how much concentric following eccentric master gears 5 that are connected; The opposite side and tightly of flank of eccentric gear 11 will make progress with the involute profile of eccentric pinion 10 under the same teeth groove that is positioned at eccentric gear 11 of following eccentric master gear 5; To descend eccentric pinion 10 and following eccentric master gear 5 usefulness alignment pins to position processing at last.
As Fig. 7 is upper and lower eccentric bushing building block principle schematic diagram, and the height of assembly precision is to influence the key factor that lap is adjusted precision.Suppose the eccentric bushing that finishes of assembling in frame, the hole line is strict up and down the eccentric line of following eccentric bushing and frame hole overlaps, and upward about the eccentric line of eccentric bushing and the frame hole hole line one angle β is arranged, the Mathematical Modeling of lap adjustment is modified to following formula so:
Δ＝φ-{H+e[cosα+cos(α+β)]} (2)
The centre distance L of cutter shaft is up and down:
L＝H+e[cosα+cos(α+β)] (3)
Convolution (2) and formula (3), rigging error β meets the transfer law of cosine function to the influence of overlapping accuracy of measurement, along with the anglec of rotation α of eccentric bushing motion change from 0 ° to 90 °, rigging error β is increasing to the influence of overlapping accuracy of measurement, under certain condition, this influence may be amplified to 100 times.Therefore eccentric bushing assembling accuracy is most important.For eliminating the influence of rigging error β, the assembly technology of necessary employing science to overlapping accuracy of measurement.
The eccentric orfice of definition eccentric bushing is installation original position (being 90 ° of phase positions shown in Figure 7) in the orthogonal position of centre bore line up and down with the line of outer circular centre hole and frame.Like this, same rigging error will be reduced to it in about 1% of 90 ° of phase places to influencing of lap when eccentric bushing rotates to 0 ° of phase place.Improved the precision of lap so greatly from fit on.
The utility model is adjusted problems such as precision is low, automaticity is low at the lap that the cold-rolled plate and strip cut edge circle shear of present domestic production exists in production application, adopted double eccentric mechanism, unique positive and negative gear clearance elimination mechanism, the eccentric bushing engineering design of science and the eccentric bushing assembly technology of manufacturing process and science and the assembly method of eccentric gear, has the precision of adjustment height, stable performance is applicable to the requirement that high-quality strip material (as finishing silicon steel plate, Automobile Plate etc.) is sheared.
Claims (4)
1, cut edge circle shear overlying quantity adjusting device, this device comprise at least down eccentric master gear (5), driving gear (6), torque limiter (7), motor (8), absolute value encoder (9), down eccentric pinion (10), go up eccentric gear (11) and cutter shaft assembly up and down, it is characterized in that: one of gear motor (8) brings out axle and is connected with absolute value encoder (9), and torque limiter (7) links together the other end shaft of gear motor (8) and driving gear (6); Driving gear (6) and eccentric master gear (5) engagement down, eccentric pinion (10) puts together on down on the geometrical central axis of eccentric master gear (5) down, make down eccentric pinion (10) and following eccentric master gear (5) concentric co-axial, eccentric pinion (10) and the isotype same tooth of eccentric master gear (5) down down, mutual dislocation; Last eccentric gear (11) is combined and installed by screw and upper slitter shaft assembly; Eccentric master gear (5) is combined and installed by screw and following cutter shaft assembly down.
2, cut edge circle shear overlying quantity adjusting device according to claim 1 is characterized in that: described upper slitter shaft assembly comprises eccentric bushing (1), last cutter shaft (2), frame (12), cylinder blade (13), preceding support cylinder bearing (14), back support cylinder bearing (15) and end face bearing (16); Last eccentric gear (11) is by the screw and last eccentric bushing (1) outside that puts together in the upper slitter shaft assembly, last cutter shaft (2) is installed in the eccentric bushing (1) with end face bearing (16) supporting by preceding support cylinder bearing (14), back support cylinder bearing (15), and last cutter shaft (2) outer end is equipped with cylinder blade (13); Last eccentric bushing (1) with cylindrical centering is assemblied in the upper spider hole of frame (12).
3, cut edge circle shear overlying quantity adjusting device according to claim 1 is characterized in that: described cutter shaft assembly down comprises cutter shaft (3), following eccentric bushing (4), frame (12), cylinder blade (13), preceding support cylinder bearing (14), back support cylinder bearing (15) and end face bearing (16) down; Down eccentric master gear (5) puts together on down outside the following eccentric bushing (4) in the cutter shaft assembly by screw, following cutter shaft (3) is installed in down in the eccentric bushing (4) with end face bearing (16) supporting by the preceding support cylinder bearing (14) in the following cutter shaft assembly, back support cylinder bearing (15), and following cutter shaft (3) outer end is equipped with cylinder blade (13); Following eccentric bushing (4) with cylindrical centering is assemblied in the lower bearing bracket hole of frame (12).
4, cut edge circle shear overlying quantity adjusting device according to claim 1 is characterized in that: described eccentric pinion (10) down and following the two mutual dislocation amount of eccentric master gear (5) are in 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200282489U CN201151010Y (en) | 2008-01-20 | 2008-01-20 | Device for adjusting superpose amount of trimming disk shears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200282489U CN201151010Y (en) | 2008-01-20 | 2008-01-20 | Device for adjusting superpose amount of trimming disk shears |
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| Publication Number | Publication Date |
|---|---|
| CN201151010Y true CN201151010Y (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200282489U Expired - Fee Related CN201151010Y (en) | 2008-01-20 | 2008-01-20 | Device for adjusting superpose amount of trimming disk shears |
Country Status (1)
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| CN (1) | CN201151010Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398069A (en) * | 2011-11-27 | 2012-04-04 | 襄阳博亚精工机器有限公司 | Main transmission system for circle shear of medium plate |
| CN107791032A (en) * | 2017-11-29 | 2018-03-13 | 洛阳新远大冶金成套设备有限公司 | Band edge-trimming machine and band cutting edge system |
-
2008
- 2008-01-20 CN CNU2008200282489U patent/CN201151010Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398069A (en) * | 2011-11-27 | 2012-04-04 | 襄阳博亚精工机器有限公司 | Main transmission system for circle shear of medium plate |
| CN102398069B (en) * | 2011-11-27 | 2016-02-17 | 襄阳博亚精工机器有限公司 | A kind of moderate-thickness plate circle shear main transmission system |
| CN107791032A (en) * | 2017-11-29 | 2018-03-13 | 洛阳新远大冶金成套设备有限公司 | Band edge-trimming machine and band cutting edge system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA NATIONAL HEAVY MACHINERY RESEARCH INSTITUTE Free format text: FORMER NAME: CHINA HEAVY MACHINERY INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |
Address after: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee after: CHINA NATIONAL HEAVY MACHINERY RESEARCH INSTITUTE Co.,Ltd. Address before: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee before: China National Heavy Machinery Research Institute Co.,Ltd. Address after: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee after: China National Heavy Machinery Research Institute Co.,Ltd. Address before: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee before: China National Heavy Machinery Research Institute Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20150120 |
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| EXPY | Termination of patent right or utility model |