CN221336783U - Vertical type grooving machine - Google Patents

Vertical type grooving machine Download PDF

Info

Publication number
CN221336783U
CN221336783U CN202322959567.9U CN202322959567U CN221336783U CN 221336783 U CN221336783 U CN 221336783U CN 202322959567 U CN202322959567 U CN 202322959567U CN 221336783 U CN221336783 U CN 221336783U
Authority
CN
China
Prior art keywords
fixedly connected
platform
planing
thin plate
movable rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202322959567.9U
Other languages
Chinese (zh)
Inventor
孙雪军
俞焕珍
张华芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Think Tank Shangduan Technology Co ltd
Original Assignee
Jiangsu Think Tank Shangduan Technology Co ltd
Filing date
Publication date
Application filed by Jiangsu Think Tank Shangduan Technology Co ltd filed Critical Jiangsu Think Tank Shangduan Technology Co ltd
Application granted granted Critical
Publication of CN221336783U publication Critical patent/CN221336783U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to the technical field of metal plate processing and discloses a vertical type grooving machine, which comprises a frame, wherein a platform is fixedly arranged above the frame, a thin plate is arranged on the upper end face of the platform, a cross beam is fixedly connected above the rear side of the platform, a plurality of groups of clamping plates are arranged above the thin plate, a planing assembly is arranged between the platform and the cross beam, clamping assemblies are symmetrically arranged at two ends of the platform, a follow-up flattening assembly is fixedly connected to the side face of the planing assembly, during operation, the planing assembly works to plane, the follow-up flattening assembly moves along with the planing assembly to enable rollers to act on two sides of a notch, internal stress on two sides of the notch is released, the surfaces of the thin plate on two sides of the notch are flattened, meanwhile, the thin plate is continuously pushed out for feeding under the driving of a driving device, the clamping assembly works to be tightly attached to the surface of the thin plate and pressed, the curling of the plate in the grooving process is effectively prevented, the product processing quality is guaranteed, and potential safety hazards are eliminated.

Description

Vertical type grooving machine
Technical Field
The utility model relates to the technical field of metal plate processing, in particular to a vertical type grooving machine.
Background
The vertical grooving machine is a mechanical equipment, it uses numerical control technology to control the planing process, mainly used for processing metal material, this kind of machine is usually made up of a number control unit, a work table and a planing device, it can process metal material of various shapes and sizes accurately, it is widely used in fields such as machinery, car, aerospace, etc., the lathe adopts the welding of high-strength steel plate, heat-insulating tempering treatment through the heat treatment, dispel the welding stress, the intensity is high, the fuselage is undeformed, stability is good, the degree of automation is high, easy to operate is swift.
When the existing mountain-wasaki 1500x4000 vertical type grooving machine carries out grooving operation on sheet products, heat and internal stress can be generated in the grooving process, and the heat and the internal stress can not be released effectively, so that the sheet materials can be bent upwards along the notch position under the action of the internal stress, and particularly for the sheet materials with denser grooving, the sheet materials on two sides of each grooving position can be bent and deformed due to heating and the internal stress, the deformation superposition causes the large bending of the whole sheet materials, the processing quality of the products is influenced, and meanwhile, the curled sheet materials reversely extend into the table top of a machine tool to collide with a cutter frame, so that serious potential safety hazards exist.
Disclosure of utility model
The utility model aims to provide a vertical type grooving machine, which solves the problems that in the prior art, the curling of a plate in the grooving process influences the processing quality of a product and serious potential safety hazards exist at the same time.
The utility model provides the following technical scheme: the utility model provides a vertical keyway planer, includes the frame, the fixed platform that is provided with in frame top, the platform up end is provided with the sheet metal, platform rear side top fixedly connected with crossbeam, the sheet metal top is provided with multiunit splint, splint upper portion and the inside sliding connection of crossbeam, be provided with the planing subassembly between platform and the crossbeam, platform both ends symmetry is provided with clamping assembly, planing subassembly side fixedly connected with retinue flattening subassembly, retinue flattening subassembly includes the fixing base, the inside swing joint of fixing base has the movable rod, the one end that the fixing base was kept away from to the movable rod is rotated and is connected with the pulley, be provided with the spring between fixing base inside wall and the movable rod, spring one end and fixing base inside wall fixed connection, the spring other end and movable rod side fixed connection.
Preferably, the clamping assembly comprises a cylinder, the cylinder both ends fixedly connected with mount pad, terminal surface fixedly connected with under mount pad up end and the platform, cylinder piston end rotates and is connected with the bull stick, bull stick tip rotates and is connected with the depression bar, the depression bar middle part rotates and is connected with the rocker, the rocker bottom rotates and is connected with the supporting seat, supporting seat bottom surface and platform up end fixedly connected with, depression bar tip fixedly connected with clamp plate, the inside relative lateral wall of clamp plate rotates and is connected with the multiunit guide pulley that is used for compressing tightly and guiding the sheet metal to remove.
Preferably, the planing assembly comprises a tool rest, the upper part of the tool rest is in sliding connection with the lower part of the cross beam, a plurality of planing tools are arranged below the tool rest side by side, and the side surface of the tool rest is fixedly connected with the side surface of the fixing seat.
Preferably, a brush for cleaning shavings is arranged between the movable rod and the planing tool, the upper part of the brush is fixedly connected with the side wall of the movable rod, and the brush head of the brush is made of bristle materials.
Preferably, the inside of the pressing plate is of a hollow structure, and mounting holes for mounting the guide wheels are formed in the two side walls of the pressing plate in a linear array mode.
Preferably, the pressing rod and the pressing plate are cast integrally, and the connecting position of the pressing rod and the pressing plate is fixedly connected with the reinforcing rib plate.
Preferably, the pulley is made of metal, the guide wheel is made of rubber, and the radial center surface of the pulley is overlapped with the center surface of the tool rest.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has simple structure, when the planing operation is carried out, the knife rest drives the planing tool to move to scrape the groove on the surface of the thin plate, meanwhile, the follow flattening component works, the fixed seat moves synchronously under the drive of the knife rest, the pulley clings to the surface of the thin plate, so that the movable rod cannot move synchronously with the fixed seat, only can rotate around the fixed seat, the spring fixedly connected with the movable rod is driven to stretch, the force generated by the deformation of the spring acts on the movable rod, the movable rod is pressed down to drive the pulley to cling to the surface of the thin plate, the pressure is uniformly applied to the two side surfaces of the planed notch when the pulley slides, so that the internal stress on the two sides of the notch is effectively released, the surface of the thin plate is flattened, the bending phenomenon is eliminated, when one groove planed is finished, the clamping plate is driven by the driving mechanism to move upwards, the clamped thin plate is loosened, the side wall of the guide wheel is clinged to the surface of the thin plate and is tightly pressed, at the moment, the thin plate is slowly pushed forward to the next groove planing position under the drive of the driving device, the thin plate is tightly pressed and rotates on the surface of the thin plate, the clamping component can be always in a clamping state in the working process, multiple times, the opening and closing are not needed, the clamping process is convenient, the clamping effect is good, the potential quality is effectively prevented, and potential safety hazards of the plate is guaranteed, and the product is processed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic perspective view of a vertical router;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is an enlarged view of FIG. 1 at B;
FIG. 4 is a schematic view of a follower flattening assembly;
FIG. 5 is a schematic view of a clamping assembly;
fig. 6 is a schematic view of the internal structure of the pressing plate.
In the figure: 11-a frame; 12-a platform; 13-a sheet; 14-a cross beam; 15-clamping plates; 21-a fixed seat; 22-a movable rod; 23-pulleys; 24-spring; 25-hairbrush; 31-cylinder; 32-mounting seats; 33-rotating rod; 34-a compression bar; 35-rocker; 36-a supporting seat; 37-pressing plate; 38-a guide wheel; 39-reinforcing rib plates; 41-knife rest; 42-planing tool.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present utility model in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
As shown in fig. 1-6, the present utility model provides a technical solution: a vertical type grooving machine comprises a frame 11, a platform 12 is fixedly arranged above the frame 11, a thin plate 13 needing to be shaved is arranged on the upper end face of the platform 12, a beam 14 is fixedly connected above the rear side of the platform 12, the beam 14 is of a U-shaped structure, a plurality of groups of clamping plates 15 are arranged above the thin plate 13, the upper parts of the clamping plates 15 are in sliding connection with the inside of the beam 14, the clamping plates 15 are driven by a driving mechanism to move up and down and are used for compacting and loosening the thin plate 13 during operation, the driving mechanism is of a structure in the prior art in a mountain-Azakii 1500x4000 vertical type grooving machine, so that a shaving assembly is arranged between the platform 12 and the beam 14, clamping assemblies are symmetrically and fixedly arranged at two ends of the platform 12, a following flattening assembly is fixedly connected to the side face of the shaving assembly, the following flattening assembly comprises a fixing seat 21, a movable rod 22 is rotatably connected to the inside of the fixing seat 21, one end of the movable rod 22, which is far away from the fixing seat 21, is rotatably connected with a pulley 23, the spring 24 is fixedly arranged between the inner side wall of the fixed seat 21 and the movable rod 22, one end of the spring 24 is fixedly connected with the inner side wall of the fixed seat 21, the other end of the spring 24 is fixedly connected with the side surface of the movable rod 22, during operation, the knife rest 41 is driven by a driving device to drive the planing tool 42 to carry out planing operation, the driving device is of the prior art structure in the mountain-wasaki 1500x4000 vertical planing machine, so that the prior art structure is not repeated, the following flattening assembly works, the fixed seat 21 synchronously moves under the driving of the knife rest 41, the pulley 23 is tightly attached to the surface of the thin plate 13 at the moment, the movable rod 22 cannot synchronously move along with the fixed seat 21, only can rotate around the fixed seat 21, the spring 24 fixedly connected with the fixed seat is driven to be lengthened, the force generated by deformation of the spring 24 acts on the movable rod 22, the movable rod 22 is driven by the pressing of the movable rod 22 to drive the pulley 23 to tightly attach to the surface of the thin plate 13, the pulley 23 evenly applies pressure to the two side surfaces of the planed notch when sliding, so that the internal stress on the two sides of the notch is effectively released, the surfaces of the thin plates on the two sides of the notch are flattened, the bending phenomenon is eliminated, the use effect is good, no additional power drive is needed, and all the planed notches can be flattened.
In this example, as shown in fig. 3 and 5, the clamping assembly includes the cylinder 31, the fixedly connected with mount pad 32 in the cylinder 31 both ends, mount pad 32 up end passes through screw fixed connection with the lower terminal surface of platform 12, the cylinder 31 piston end rotates and is connected with bull stick 33, bull stick 33 tip rotates and is connected with depression bar 34, depression bar 34 middle part rotates and is connected with rocker 35, rocker 35 bottom rotates and is connected with supporting seat 36, supporting seat 36 bottom surface and platform 12 up end fixed connection, depression bar 34 tip fixedly connected with clamp plate 37, the inside opposite lateral wall rotation of clamp plate 37 is connected with multiunit guide pulley 38, during operation, when a recess planing is accomplished, splint 15 upwards moves under the drive of actuating mechanism, the sheet 13 of clamp is loosened, cylinder 21 work drives bull stick 33 rotation, depression bar 34 rotation drives clamp plate 37 downwardly moving, the inside guide pulley 38 lateral wall of clamp plate 37 is hugged closely at sheet 13 surface and compresses tightly, this moment sheet 13 is slowly forward to the recess planing position under the drive of drive arrangement, this drive arrangement is the existing technical construction in the vertical planing machine of mountain 1500x4000, so the bending sheet 13 is in the clamping assembly is not in the state of being in order to hold down in the clamping effect, the clamping assembly is not to be in the bending state of holding up at all times, the time, the clamping assembly is easy to be in the clamping effect of holding up in the clamping process, the clamping assembly is required to be rotated.
In this example, as shown in fig. 1 and fig. 2, the planing assembly includes a cutter rest 41, the upper portion of the cutter rest 41 is slidably connected with the lower portion of the beam 14, the cutter rest 41 is driven by a driving assembly in the beam 14 to linearly move along the lower portion of the beam 14, and the driving assembly is a prior art structure in a wasaki 1500x4000 vertical planing machine, so that a plurality of planing tools 42 are installed side by side below the cutter rest 41, and the side surface of the cutter rest 41 is fixedly connected with the side surface of the supporting rod 34.
In this example, as shown in fig. 2, a brush 25 for cleaning shavings is fixedly connected between the movable rod 22 and the planing tool 42, the upper portion of the brush 25 is fixedly connected with the side wall of the movable rod 22, the brush head of the brush 25 adopts bristle materials, and in operation, the brush can synchronously rotate along with the movable rod 22, so that the cleaning of the surfaces of the thin plates 13 with different thicknesses is adapted, the shavings generated after planing can be effectively cleaned by the bristle materials, the shavings are prevented from winding into the surfaces of the pulleys 23, the pulleys 23 are blocked, meanwhile, the shavings cleaning is facilitated, and the planing quality of the thin plates 13 is ensured.
In this example, as shown in fig. 6, the inside of the pressing plate 37 is of a hollow structure, the linear arrays on the two side walls of the pressing plate 37 are provided with mounting holes for mounting the guide wheels 38, the guide wheels 38 are rotatably mounted in the mounting holes, the pressing plate 37 is pressed down under the action of the pressing rod 34, so that the surface of the guide wheels 38 is tightly attached to the surface of the thin plate 13, when the thin plate 13 is pushed forward under the driving of the driving device, the guide wheels 38 tightly attached above rotate around the mounting holes on the pressing plate 37 under the action of friction force, and the thin plate 13 is ensured to be prevented from tilting while the normal forward feeding of the thin plate 13 is ensured.
In this example, as shown in fig. 5, depression bar 34 and clamp plate 37 are as an organic whole casting, and depression bar 34 and clamp plate 37 connected position fixedly connected with deep floor 39 effectively strengthen the intensity of depression bar 34 and clamp plate 37, avoid the fracture risk of depression bar 34 and clamp plate 37 junction that causes for a long time use, promote clamping assembly's life.
In this example, as shown in fig. 2 and 6, the pulley 23 is made of metal, so as to effectively improve the strength of the pulley 23, improve the flattening effect and the service life, make the guide wheel 38 made of rubber, have a certain elasticity, be convenient for smoothly pass through the planed groove position when the surface of the thin plate 13 rolls, avoid leaving scratches on the surface of the thin plate 13, ensure the processing quality of the thin plate 13, ensure that the radial center surface of the pulley 23 coincides with the center surface of the tool rest 41, ensure that both sides of the pulley 23 are uniformly contacted on both sides of the groove in the operation process, improve the stress release effect, and ensure that the thin plates 13 on both sides of the groove flatten.
Working principle: during operation, the knife rest 41 is driven by a driving component in the cross beam 14 to linearly move along the lower part of the cross beam 14, the knife rest 41 drives the planing tool 42 to move to scrape grooves on the surface of the thin plate 13, meanwhile, the follow-up flattening component works, the fixing seat 21 is driven by the knife rest 41 to synchronously move, the pulley 23 is tightly attached to the surface of the thin plate 13, so that the movable rod 22 cannot synchronously move along with the fixing seat 21, only can rotate around the fixing seat 21, the spring 24 fixedly connected with the movable rod is driven to stretch, the force generated by deformation of the spring 24 acts on the movable rod 22, the movable rod 22 is enabled to downwards press the pulley 23 to tightly slide on the surface of the thin plate 13, the pulley 23 uniformly applies pressure on two side surfaces of the planed groove, so that internal stress on two sides of the groove is effectively released, the thin plate 13 is flattened, bending phenomena are eliminated, when one groove is planed, the driving mechanism is driven to upwards move the clamped thin plate 13, the cylinder 21 works to drive the rotary rod 33 to rotate, the rotary rod 34 rotates to drive the pressing rod 37 to downwards, the side wall of the guide wheel 38 inside the pressing plate 37 is tightly attached to the surface of the thin plate 13 and tightly presses the surface of the thin plate 13, the thin plate 13 is driven to be tightly pressed by the guide wheel 38, and the thin plate 13 is driven to be clamped in a position forwards by the position, the bending device is enabled to be in a position to be in a state of being convenient to clamp the situation, and the thin plate 13 is kept in a state, and the situation is kept in a clamping state when the thin plate 13 is required to be clamped, and the thin by the thin plate 13 is constantly to be clamped and when the thin.
It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).
It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (7)

1. The utility model provides a vertical keyway planer, includes frame (11), frame (11) top is fixed to be provided with platform (12), platform (12) up end is provided with sheet metal (13), platform (12) rear side top fixedly connected with crossbeam (14), sheet metal (13) top is provided with multiunit splint (15), splint (15) upper portion and crossbeam (14) inside sliding connection, be provided with the planing subassembly between platform (12) and crossbeam (14), platform (12) both ends symmetry is provided with clamping assembly, planing subassembly side fixedly connected with is along with flattening subassembly, its characterized in that: the following flattening assembly comprises a fixed seat (21), a movable rod (22) is connected to the inside of the fixed seat (21) in a rotating mode, a pulley (23) is connected to one end, away from the fixed seat (21), of the movable rod (22) in a rotating mode, a spring (24) is arranged between the inner side wall of the fixed seat (21) and the movable rod (22), one end of the spring (24) is fixedly connected with the inner side wall of the fixed seat (21), and the other end of the spring (24) is fixedly connected with the side face of the movable rod (22).
2. The vertical router of claim 1 wherein: the clamping assembly comprises an air cylinder (31), wherein two ends of the air cylinder (31) are fixedly connected with an installation seat (32), the upper end face of the installation seat (32) is fixedly connected with the lower end face of the platform (12), the piston end of the air cylinder (31) is rotationally connected with a rotating rod (33), the end part of the rotating rod (33) is rotationally connected with a pressing rod (34), the middle part of the pressing rod (34) is rotationally connected with a rocker (35), the bottom of the rocker (35) is rotationally connected with a supporting seat (36), the bottom face of the supporting seat (36) is fixedly connected with the upper end face of the platform (12), the end part of the pressing rod (34) is fixedly connected with a pressing plate (37), and the inner opposite side walls of the pressing plate (37) are rotationally connected with a plurality of guide wheels (38) used for pressing and guiding the sheet (13) to move.
3. The vertical router of claim 1 wherein: the planing assembly comprises a tool rest (41), the upper part of the tool rest (41) is in sliding connection with the lower part of the cross beam (14), a plurality of planing tools (42) are arranged below the tool rest (41) side by side, and the side surface of the tool rest (41) is fixedly connected with the side surface of the fixing seat (21).
4. A vertical router according to claim 3, wherein: a brush (25) for cleaning shavings is arranged between the movable rod (22) and the planing tool (42), the upper part of the brush (25) is fixedly connected with the side wall of the movable rod (22), and a brush head of the brush (25) is made of bristle materials.
5. The vertical router of claim 2 wherein: the inside of the pressing plate (37) is of a hollow structure, and mounting holes for mounting guide wheels (38) are formed in the two side walls of the pressing plate (37) in a linear array mode.
6. The vertical router of claim 2 wherein: the compression bar (34) and the pressing plate (37) are cast integrally, and a reinforcing rib plate (39) is fixedly connected to the connection position of the compression bar (34) and the pressing plate (37).
7. The vertical router of claim 2 wherein: the pulley (23) is made of metal, the guide wheel (38) is made of rubber, and the radial center surface of the pulley (23) is overlapped with the center surface of the tool rest (41).
CN202322959567.9U 2023-11-02 Vertical type grooving machine Active CN221336783U (en)

Publications (1)

Publication Number Publication Date
CN221336783U true CN221336783U (en) 2024-07-16

Family

ID=

Similar Documents

Publication Publication Date Title
CN210498536U (en) Efficient environment-friendly hydraulic plate shearing machine
CN101575797B (en) Semi-automatic double-pole umbrella fabric pressure cutting machine
CN210936758U (en) Saw bit stamping process device
CN108787869B (en) Reciprocating rolling equipment and method for rolling workpiece by using same
CN112953140A (en) Automatic flat wire inserting molding machine of flat wire hairpin motor of new energy automobile
CN221336783U (en) Vertical type grooving machine
CN209830490U (en) Section bar cutting machine for construction
CN218284472U (en) Steel band cutting device that punches a hole for anchor
CN217943602U (en) Special cross cutting machine of full-automatic brim of a hat
KR101554566B1 (en) Multi-function folding device
CN216632256U (en) Stamping device is used in forging processing
CN216881445U (en) Intelligence saw bit bucker
CN215545501U (en) Cutting equipment is used in aluminum alloy ex-trusions production
CN213225413U (en) Sheet metal part grinding device
CN215360060U (en) Passenger train accessory press that machining precision is high
CN212857350U (en) Stamping device
CN210755478U (en) Cutting device for producing check ring
CN210587385U (en) Hydraulic plate shearing machine for shearing automobile metal plate
CN221185333U (en) Iron split heads welding set
CN217095880U (en) Follow-up material pressing assembly for gantry type sheet metal grooving machine
CN216656511U (en) Hydraulic cutting device for aluminum profile
CN216780516U (en) Grooving machine device
CN216397581U (en) Rib tearing tool for aluminum profile
CN210451203U (en) Metal cutting machine convenient to adjust cutting position
CN219582115U (en) Hydraulic corner combining machine for processing aluminum alloy doors and windows

Legal Events

Date Code Title Description
GR01 Patent grant