CN102615570B - Stepless dividing device and camshaft grinder comprising same - Google Patents
Stepless dividing device and camshaft grinder comprising same Download PDFInfo
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- CN102615570B CN102615570B CN 201210049722 CN201210049722A CN102615570B CN 102615570 B CN102615570 B CN 102615570B CN 201210049722 CN201210049722 CN 201210049722 CN 201210049722 A CN201210049722 A CN 201210049722A CN 102615570 B CN102615570 B CN 102615570B
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- 238000005452 bending Methods 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 239000010959 steel Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
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- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
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- 229910001651 emery Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
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Abstract
The invention provides a stepless dividing device and a camshaft grinder comprising the same. The stepless dividing device comprises a servo motor (2), a hollow spindle (7) arranged between two bearing seats (6 and 10), a cam sample plate (9) fixedly connected onto the hollow spindle (7) and a dividing driving plate (12) movably sleeved on the head portion of the hollow spindle (7). The stepless dividing device is characterized in that a pulling tight set device for driving the hollow spindle (7) to be connected or disconnected with the dividing driving plate (12) is arranged in an inner hole of the hollow spindle (7), a pipe bending cylinder (4) for pushing the pulling tight set device (3) is sleeved on the tail portion of the hollow spindle (7), and a disc braking device for locking the dividing driving plate (12) is further arranged outside the dividing driving plate (12). The dividing driving plate (12) has the advantages of being simple in structure, easy to manufacture, capable of dividing at any angle, fast in dividing and high in accuracy.
Description
Technical field
The present invention relates to the metal-working plant field, especially, relate to a kind of stepless indexing means, comprise servomotor, be installed on the hollow shaft between the diaxon bearing, be cemented in cam template on hollow spindle and the kink calibration driver plate at the hollow spindle head.In addition, the invention still further relates to a kind of camshaft grinding machine that comprises this stepless indexing means.
Background technology
Camshaft is one of vital part of automobile engine, and its quality, machining accuracy height directly have influence on the discharge of engine, energy-conservation and service life.
In prior art, major part cam manufacturing enterprise still is widely used direct copy camshaft grinding machine profile copy grinding camshaft part, the precision of the cam contour of camshaft directly is subject to the impact of the camshaft model accuracy of manufacture, the cam of the cam template of grinding machine and institute's converted products is one to one, that is to say, on a product, several cams are arranged, will be useful on lathe instead by method, process the model of several equal numbers, the fixed dividing head of general employing on the direct copy camshaft grinding machine in the industry, its driver plate and index dial adopt screw to carry out mechanical connection, after this method completes the camshaft clamped one time, every processing a slice camshaft, the camshaft workpiece can not rotate a phase angle with respect to contour plate, on a camshaft workpiece, several cams are arranged, will process accordingly several contour plates on lathe pattern main shaft.Simultaneously, the difficulty of processing of machining cam contour plate is large, and efficiency is low, and the model uniformity is poor, and after processing, the molded line uniformity of product is also poor, is difficult to guarantee the uniformity of the outer meter accuracy of each cam.
For addressing this problem, Chinese invention patent number is 200610031255.X, a kind of automatic dividing attachment for camshaft grinding machine is disclosed, this device comprises hollow shaft, the first face gear empty set is on hollow shaft, this face gear periphery is provided with locating slot, and the first face gear one side is provided with the alignment pin of turnover locating slot; The second face gear is arranged on and rotates with hollow shaft on hollow shaft and can slide vertically on hollow shaft, the flank of tooth of its face gear can with the flank engagement of the first face gear, be provided with the drive unit that drives the second face gear to be in axial sliding between the second face gear and hollow shaft.During calibration, the locating slot that alignment pin inserts the first end-tooth is fixed, by drive unit, drive the second end-tooth and the first end-tooth to separate, servomotor by control system rotates the angle that hollow spindle needs to cam again, then drive unit is in conjunction with the first and second end-tooths, finally unclamp alignment pin, complete the calibration of cam.This device preferably resolves above-mentioned technical problem, adopts a pattern, just the identical cam of different angles on energy machining cam axle.But, because adopting gear, this device carries out the calibration location, and adopt the groove latch structure to lock, still exist following not enough:
(1), gear compound graduation location structure complexity, and the Gear Processing required precision is high, manufactures difficulty, cost is high.
(2) end-toothed disc is comprised of 48 decile end teeth, therefore calibration can only divide by the multiple of 7.5 ° of sub-multiple angles, belongs to " limited calibration ", and calibration has the minimum angles restriction, can't realize calibration at any angle, affects indexing accuracy.
(3) the calibration driver plate adopts groove pin formula locking mechanism, due to the restricted number of groove, can not lock optional position, and lock speed is slow, and efficiency is low, easily makes mistakes.And the intrinsic gap of groove pin formula locking mechanism, also can cause the problem that the latched position error is large, directly affects the spindle index precision.
Summary of the invention
The object of the invention is to provide a kind of stepless indexing means, with solve the cost that in prior art, indexing means exists high, can not arbitrarily angled calibration location and locking, the slow-footed technical problem of calibration.
For achieving the above object, according to an aspect of the present invention, a kind of stepless indexing means is provided, comprise servomotor, be installed on the hollow spindle between the diaxon bearing, be cemented in cam template on hollow spindle and the kink calibration driver plate at the hollow spindle head, its design feature is, in the endoporus of hollow spindle, is equipped with to drive hollow spindle to be combined with the calibration driver plate or the tensioner of drawing of separating is determined device; Being set with pushing tow at the afterbody of hollow spindle draws tensioner to determine the pipe bending cylinder of device; The calibration driver plate outside also is provided with the disc brake apparatus of locking calibration driver plate.
Further, the endoporus place of hollow spindle head is made as stepped hole; The head cylindrical surface peripheral of hollow spindle is evenly equipped with more than two the installing hole perpendicular with the axis of hollow spindle.
Further, drawing tensioner to determine device comprises: be contained in the pull bar in stepped hole; The head of pull bar is provided with the conical plug of back taper, and afterbody is provided with screw thread and screws the adjusting nut of screw thread; Elastic parts, be set between pull bar and hollow spindle, and front end is connected to the endoporus stage portion of hollow spindle, and rear end is regulated with adjusting nut locking; Several zygotes, the head that is slidably mounted on hollow spindle is circumferentially in uniform installing hole; The head butt of zygote is to calibration driver plate internal face, and the afterbody butt is to the conical surface of conical plug.
Further, elastic parts is butterfly spring, helical spring or elastic rubber ring; Zygote is cylinder or steel ball.
Further, pipe bending cylinder is one-way cylinder, comprising: piston reaches the piston rod with described piston one; The end butt of piston rod is to the tail end of pull bar; And, be installed on the ring joint at pipe bending cylinder oil-in place.
Further, the calibration driver plate also comprises a circular braking surface.
Further, disc brake apparatus is single-acting cylinder, comprising: the disc brake oil cylinder; And the damper brake that is connected in the piston rod head of disc brake oil cylinder.
Further, the calibration driver plate also comprises a circular braking surface, and damper brake has the arcuate friction surface corresponding with the circular braking surface of calibration driver plate.
Further, the arcuate friction surface of damper brake is comprised of friction material.
According to a further aspect in the invention, also provide a kind of camshaft grinding machine, it comprises the stepless indexing means of technique scheme.
The present invention has following beneficial effect:
(1), owing to drawing tensioner to determine device, comprise pull bar, elastic parts and zygote, without profile of tooth, connect, simple in structure, easy to manufacture, cheap.
(2), the mode two ends that contact by rigidity due to the zygote that draws tensioner to determine device respectively butt pull bar inverted cone surface and calibration driver plate internal face come clutch hollow spindle and calibration driver plate, required actuating length is minimum, thereby significantly improves calibration speed.
(3), owing to having adopted the Non-tooth type clutch to connect, can realize the arbitrarily angled calibration of hollow spindle, and there is no the minimum angles restriction, thereby raising indexing accuracy, meet the processing of all angle camshafts in 360 ° of scopes, widened the equipment range of work, improved utilization rate of equipment and installations.
(4), owing to adopting disc brake apparatus, can lock the calibration driver plate in any angular position, realize the gapless locking, guarantee indexing accuracy.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.Below, with reference to figure, the present invention is further detailed explanation.
The accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the structural representation of the stepless indexing means of camshaft grinding machine of the preferred embodiment of the present invention;
Symbol description: Timing Belt-1, servomotor-2, draw tensioner to determine device-3, pipe bending cylinder-4, large belt wheel-5, rear bearing block-6, hollow spindle-7, long key-8, cam template-9, front-end bearing pedestal-10, zygote-11, calibration driver plate-12, finger-13, thimble-14, damper brake-16, disc brake oil cylinder-17, guide wheel-18, emery wheel-19, workpiece-20, small pulley-21, support set-31, pull bar-32, elastic parts-33, kink-34, adjusting nut-35, conical plug-36, lead-37, the elongated body of rod-38, ring joint-41, piston-42, oil cylinder body-43, return spring-44, piston rod-45, stepped hole-71.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, the stepless indexing means of the preferred embodiment of the present invention, comprise Timing Belt 1, servomotor 2, draw tensioner to determine device 3, pipe bending cylinder 4, large belt wheel 5, rear bearing block 6, hollow spindle 7, long key 8, cam template 9, front-end bearing pedestal 10, zygote 11 and calibration driver plate 12.
The two ends of hollow spindle 7 are separately installed with front-end bearing pedestal 10 and rear bearing block 6, between axle bearing 10,6, by a long key 8, are installed with the linear cam template of some differences 9.An end at front-end bearing pedestal 10, be provided with stepped hole 71 at the endoporus place of the head of hollow spindle 7, to being evenly equipped with more than two the installing hole perpendicular with hollow spindle 7 axis, be slidably fitted with corresponding cylindrical zygote 11 at the cylindrical of the head of hollow spindle 7 in this installing hole.The present embodiment adopts two installing holes and two zygotes.Calibration driver plate 12 movable sets are at the head of hollow spindle and be positioned at above zygote 11, and this calibration driver plate 12 has a concentric columniform braking surface and is cemented in a distolateral finger 13.At an end of rear bearing block 6,, at the afterbody of hollow spindle 7, key is connected with a synchronous large belt wheel 5.The above-mentioned interior zygote 11 of installing hole that is arranged on hollow spindle 7 can also adopt other shape, such as adopting steel ball as zygote, also can reach effect same.
Draw tensioner to determine in endoporus that device 3 is installed on hollow spindle 7.Drawing tensioner to determine device 3 consists of pull bar 32, elastic parts 33, support set 31 and kink 34.Preferably, in the present embodiment, elastic parts 33 is disk spring.Wherein, the head of pull bar 32 is processed with the conical plug 36 of back taper and connects the lead 37 of conical plug 36, middle part is an elongated body of rod 38, this elongated body of rod 38 penetrates from the head of hollow spindle 7, through stepped hole 71, the face of cylinder of the lead 37 on its pull bar 32 can be slidably matched in the endoporus of corresponding hollow spindle 7, for pull bar 32 forward and backward movement longitudinally play the guiding role.Priority movable set support set 31 between the endoporus of the elongated body of rod 38 and hollow spindle 7, elastic parts 33 and kink 34, because the endoporus of hollow spindle 7 is provided with the stepped hole 71 of outstanding bore area, the end face butt of support set 31 is to these stepped hole 71 sidewalls, and the screw thread of processing by pull bar 32 afterbodys during installation and the adjusting nut that screws this screw thread 35 compress elastic parts 33.Obviously, the compression degree that this structure can be adjusted elastic parts 33 by precession and the back-out of adjusting nut 35, thereby the thrust of adjustment pull bar 32.When pull bar 32 is installed, the back taper plug 36 of its head is positioned at the position of the installing hole of hollow spindle 7, the head butt of the cylindrical zygote 11 in the aforementioned installing hole that is arranged on hollow spindle 7 is to the internal face of calibration driver plate 12, and the afterbody butt is to the conical surface of the conical plug 36 of back taper.The present embodiment elastic parts preferably adopts butterfly spring, certainly, also can adopt helical spring or elastic rubber ring in a further embodiment.
Being connected with pushing tow at the afterbody of hollow spindle 7 draws tensioner to determine the pipe bending cylinder 4 of device 3.Pipe bending cylinder 4 is one-way cylinders, comprising: be provided with the swivel joint 41 into and out of oil duct, piston 42, piston rod 45, oil cylinder body 43 and return spring 44.Oil cylinder body 43 is threaded in the afterbody of hollow spindle 7, and piston rod 45 is processed into one with piston 42, with simplified structure.The end butt of piston rod 45 is to the tail end of pull bar 32.
Be positioned at the disc brake apparatus that calibration driver plate 12 1 sides also are provided with this calibration driver plate 12 of braking.Disc brake apparatus comprises: disc brake oil cylinder 17, and the damper brake 16 that is connected in the piston rod head of disc brake oil cylinder 17.Damper brake 16 has the corresponding arcuate friction surface of circular braking surface with calibration driver plate 12.The arcuate friction surface of damper brake 16 is comprised of known friction material.
In addition, the present invention also comprises a kind of camshaft grinding machine, and it comprises previously described stepless indexing means.
During work, mounting flange formula thimble 14, clamping camshaft workpiece 20 and finger 13, start servomotor 2, the small pulley 21 be connected on servomotor 2 output shafts drives large belt wheel 5 rotations by synchronous belt 1, and the pipe bending cylinder 4, cam template 9 and the calibration driver plate 12 that drive hollow spindle 7, connect on it rotate simultaneously, the reel cage (not shown) of falling down, guide wheel 18 contact cam templates 9, shift near emery wheel 19 and start linear by the cam template 9 of guide wheel 18 butts of profile copy grindings.After this sheet cam machines, when main shaft needs calibration: reel cage is put, and cam template 9 breaks away from guide wheel 18.17 actions of disc brake oil cylinder, checked calibration driver plate 12 by damper brake 16.Pipe bending cylinder 4 actions, move to right elasticity of compression assembly 33, conical plug 36 of piston rod 45 pushing tow pull bars 32 moves right, support is risen and is lost pressure in the zygote 11 of calibration driver plate 12 inner hole walls, hollow spindle 7 unclamps with calibration driver plate 12, now, a minute of angle (be cam template 9 with respect to calibration driver plate 12 or finger 13 or workpiece 20, rotate a minute of angle) is rotated in the instruction that servomotor 2 drives hollow spindle 7 follow procedures by Timing Belt 1.Afterwards, pipe bending cylinder 4 oil return actions, return spring 44 and elastic parts 33 acting in conjunction lower pistons 42 backward (left-hand in figure) return, effect inferior pyramidal plug 36 at elastic parts 33 moves backward, at this moment, conical plug 36 applies bulbs of pressure support tightly calibration driver plate 12 inner hole walls (now hollow spindle 7 completes in conjunction with action with driver plate 12) that rise to zygote 11; The 17 oil return actions of disc brake oil cylinder, damper brake 16 unclamps, and calibration driver plate 12 brake offs have now just completed the calibration program.
Again reel cage is fallen down forward, make cam template 9 and guide wheel 18 close up, then start to carry out the automatic profiling grinding by the shape line of cam template 9 and the phase angle after calibration.Often complete after a cam ground, repeat above-mentioned action, until ground last cam.
For the different linear cams of grinding on a grinding machine, to enlarge the range of work, improve utilization rate of equipment and installations, can be set with the linear cam template of some differences 9 on hollow spindle, when a certain linear cam of needs processing, as long as guide wheel 18 is abutted against to this cam template 9.
Can find out from the foregoing description, owing to drawing tensioner to determine device 3, comprise pull bar 32, elastic parts 33 and zygote 11, connect without profile of tooth, simple in structure, easy to manufacture, cheap.Clutch hollow spindle 7 and calibration driver plate 12 are come in the mode two ends that contact by rigidity due to the zygote 11 that draws tensioner to determine device 3 butt pull bar 32 inverted cone surfaces and calibration driver plate 12 internal faces respectively, and required actuating length is minimum, thereby significantly improves calibration speed.Owing to having adopted the Non-tooth type clutch to connect, can realize the arbitrarily angled calibration of hollow spindle, and there is no the minimum angles restriction, thereby raising indexing accuracy, meet the processing of all angle camshafts in 360 ° of scopes, widened the equipment range of work, improved utilization rate of equipment and installations.Owing to adopting disc brake apparatus, can lock calibration driver plate 12 in any angular position, realize the gapless locking, guarantee indexing accuracy.Thus, the present invention can be widely used in camshaft grinding machine.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a stepless indexing means, it is characterized in that the hollow spindle (7) that comprises servomotor (2), is installed on the diaxon bearing between (6,10) is cemented in cam template (9) on described hollow spindle (7) and the kink calibration driver plate (12) at hollow spindle (7) head, wherein
The tensioner of drawing that drives described hollow spindle (7) to engage with described calibration driver plate (12) or separate is installed in the endoporus of described hollow spindle (7) and determines device (3);
Afterbody at described hollow spindle (7) is set with the described pipe bending cylinder (4) that draws tensioner to determine device (3) of pushing tow;
Described calibration driver plate (12) outside also is provided with the disc brake apparatus of the described calibration driver plate of locking (12).
2. stepless indexing means according to claim 1, is characterized in that,
The endoporus place of described hollow spindle (7) head is made as stepped hole (71);
The head cylindrical surface peripheral of described hollow spindle (7) is evenly equipped with more than two the installing hole perpendicular with the axis of described hollow spindle (7).
3. stepless indexing means according to claim 2, is characterized in that, describedly draws tensioner to determine device (3) to comprise:
Be contained in the pull bar (32) in described stepped hole (71);
The head of described pull bar (32) is provided with the conical plug (36) of back taper, and afterbody is provided with screw thread and screws the adjusting nut of described screw thread (35);
Elastic parts (33), be set between described pull bar (32) and hollow spindle (7), and front end is connected to the endoporus stage portion of described hollow spindle (7), and described adjusting nut for rear end (35) locking is regulated;
Several zygotes (11), the head that is slidably mounted on described hollow spindle (7) is circumferentially in uniform installing hole;
The head butt of described zygote (11) is to described calibration driver plate (12) internal face, and the afterbody butt is to the conical surface of described conical plug (36).
4. stepless indexing means according to claim 3, is characterized in that,
Described elastic parts (33) is butterfly spring, helical spring or elastic rubber ring;
Described zygote (11) is cylinder or steel ball.
5. stepless indexing means according to claim 3, is characterized in that, described pipe bending cylinder (4) is one-way cylinder, comprising:
Piston (42);
With the piston rod (45) of described piston (42) one, the end butt of described piston rod (45) is to the tail end of described pull bar (32); And
Be installed on the ring joint (41) at described pipe bending cylinder (4) oil-in place.
6. stepless indexing means according to claim 1, is characterized in that,
Described calibration driver plate (12) also comprises a circular braking surface.
7. stepless indexing means according to claim 1, is characterized in that, described disc brake apparatus is single-acting cylinder, comprising:
Disc brake oil cylinder (17); And
Be connected in the damper brake (16) of the piston rod head of described disc brake oil cylinder (17).
8. stepless indexing means according to claim 7, is characterized in that,
Described calibration driver plate (12) also comprises a circular braking surface, and described damper brake (16) has the arcuate friction surface corresponding with the circular braking surface of described calibration driver plate (12).
9. stepless indexing means according to claim 8, is characterized in that,
The arcuate friction surface of described damper brake (16) is comprised of friction material.
10. a camshaft grinding machine, comprise indexing means, it is characterized in that, described indexing means is according to the described stepless indexing means of any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210049722 CN102615570B (en) | 2012-02-29 | 2012-02-29 | Stepless dividing device and camshaft grinder comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210049722 CN102615570B (en) | 2012-02-29 | 2012-02-29 | Stepless dividing device and camshaft grinder comprising same |
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| CN102615570A CN102615570A (en) | 2012-08-01 |
| CN102615570B true CN102615570B (en) | 2013-12-18 |
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| CN 201210049722 Active CN102615570B (en) | 2012-02-29 | 2012-02-29 | Stepless dividing device and camshaft grinder comprising same |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104526555A (en) * | 2015-01-30 | 2015-04-22 | 重庆市银钢一通科技有限公司 | Grinding clamp |
| CN111633515B (en) * | 2020-06-10 | 2021-06-15 | 杭州加淼科技有限公司 | Stainless steel cutting ferrule formula connects manufacturing automation processing system |
| CN111546142B (en) * | 2020-06-10 | 2021-06-11 | 浙江飞挺机械股份有限公司 | Ferrule type joint manufacturing and processing technology |
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| US5133566A (en) * | 1991-12-06 | 1992-07-28 | Baker Douglas F | Collet activated spindle work stop |
| US5529531A (en) * | 1994-12-23 | 1996-06-25 | Western Atlas Corporation | Tapered bearing for drive drum assembly of grinding machine utilizing multiple, parallel abrasive belts |
| CN2880376Y (en) * | 2006-02-22 | 2007-03-21 | 湖南大学 | Automatic scale divesion device for camshaft grinder |
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Inventor after: Huang Taoyi Inventor after: Su Tao Inventor after: Peng Jinglin Inventor after: Wu Jinwu Inventor after: Luo Lei Inventor before: Huang Taoyi Inventor before: Su Tao Inventor before: Peng Jinglin Inventor before: Ding Yongfu Inventor before: Wu Jinwu Inventor before: Shen Nailiang Inventor before: Luo Lei Inventor before: Xu Mansheng Inventor before: Peng Gangping |
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Free format text: CORRECT: INVENTOR; FROM: HUANG TAOYI SU TAO PENG JINGLIN DING YONGFU WU JINWU SHEN NAILIANG LUO LEI XU MANSHENG PENG GANGPING TO: HUANG TAOYI SU TAO PENG JINGLIN WU JINWU LUO LEI |
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Owner name: HUANG JUNHAO Free format text: FORMER OWNER: HUNAN HUDA RUILAI ELECTROMECHANICAL CO., LTD. Effective date: 20130929 Owner name: HUNAN HUDA RUILAI ELECTROMECHANICAL CO., LTD. Effective date: 20130929 |
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Inventor after: Huang Junhao Inventor after: Su Tao Inventor after: Peng Jinglin Inventor after: Wu Jinwu Inventor after: Luo Lei Inventor before: Huang Taoyi Inventor before: Su Tao Inventor before: Peng Jinglin Inventor before: Wu Jinwu Inventor before: Luo Lei |
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Free format text: CORRECT: INVENTOR; FROM: HUANG TAOYI SU TAO PENG JINGLIN WU JINWU LUO LEI TO: HUANG JUNHAO SU TAO PENG JINGLIN WU JINWU LUO LEI |
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Effective date of registration: 20130929 Address after: 410009 No. two, section 300, South Second Ring Road, Changsha, Hunan Applicant after: Huang Junhao Applicant after: Hunan Huda Ruilai Electromechanical Co., Ltd. Address before: 410009 No. two, section 300, South Second Ring Road, Changsha, Hunan Applicant before: Hunan Huda Ruilai Electromechanical Co., Ltd. |
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Effective date of registration: 20180824 Address after: 410009 169 Yuen Hua Road, Yuhua District, Changsha, Hunan Co-patentee after: Hunan iridium CNC equipment Limited by Share Ltd Patentee after: Huang Junhao Address before: 410009 300 section two, South Second Ring Road, Changsha City, Hunan Co-patentee before: Hunan Huda Ruilai Electromechanical Co., Ltd. Patentee before: Huang Junhao |
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