CN213438291U - Section bar cutting unloading frock - Google Patents

Section bar cutting unloading frock Download PDF

Info

Publication number
CN213438291U
CN213438291U CN202022007534.0U CN202022007534U CN213438291U CN 213438291 U CN213438291 U CN 213438291U CN 202022007534 U CN202022007534 U CN 202022007534U CN 213438291 U CN213438291 U CN 213438291U
Authority
CN
China
Prior art keywords
section bar
limiting
placing plate
cutter
cutting
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
CN202022007534.0U
Other languages
Chinese (zh)
Inventor
孙汉超
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.)
Youliang Heavy Industry Wuhan Co ltd
Original Assignee
Youliang Heavy Industry Wuhan Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Youliang Heavy Industry Wuhan Co ltd filed Critical Youliang Heavy Industry Wuhan Co ltd
Priority to CN202022007534.0U priority Critical patent/CN213438291U/en
Application granted granted Critical
Publication of CN213438291U publication Critical patent/CN213438291U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Sawing (AREA)

Abstract

The utility model relates to a section bar cutting unloading frock, its characterized in that: the cutting device comprises a base, a rotating disk, a cutter assembly and a placing plate for placing a section to be cut, wherein the rotating disk is horizontally and rotatably arranged on the base, and the cutter assembly is fixedly arranged on the edge of the rotating disk; the shelving plate is horizontally and fixedly arranged on the base, one end of the shelving plate extends to the upper part of the rotating disk, and the other end of the shelving plate horizontally extends to one side of the base; at least one limiting part used for limiting the section to be cut is fixedly arranged on the placing plate. The utility model has the advantages of simple structure, reasonable design, increased stability of the section bar during cutting and ensured cutting quality of the section bar; in addition, the cutting angle of the cutter component can be adjusted according to production requirements, and the use is convenient.

Description

Section bar cutting unloading frock
Technical Field
The utility model relates to a section bar processing equipment technical field, concretely relates to section bar cutting unloading frock.
Background
The section bar is an object with a certain geometric shape, which is made of iron or steel and materials with certain strength and toughness through the processes of rolling, extruding, casting and the like. The material has certain appearance size, certain shape of cross section and certain mechanical and physical properties. The section bar can be used independently and can be further processed into other manufactured products, and is commonly used for building structures and manufacturing and installation.
During the processing of the section bar, it is usually necessary to cut it into the length and shape required for building. At present, a cutting tool in the prior art is not provided with a limiting mechanism, so that a profile is easy to deviate, and the cutting quality of the profile is influenced; in addition, the cutter is fixed, can't adjust according to the section bar cutting demand of difference.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a section bar cutting unloading frock is provided, aim at solving above-mentioned technical problem.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the profile cutting and blanking tool comprises a base, a rotating disc, a cutter assembly and a placing plate for placing a profile to be cut, wherein the rotating disc is horizontally and rotatably arranged on the base, and the cutter assembly is fixedly arranged on the edge of the rotating disc; the shelving plate is horizontally and fixedly arranged on the base, one end of the shelving plate extends to the upper part of the rotating disk, and the other end of the shelving plate horizontally extends to one side of the base; at least one limiting part used for limiting the section to be cut is fixedly mounted on the placing plate.
The utility model has the advantages that: in the process of cutting the section bar, firstly, manually placing the section bar to be cut on the placing plate, and simultaneously limiting the section bar through the limiting piece to enable the section bar to be placed in order; and secondly, manually rotating the rotating disc, driving the cutter assembly to rotate to a set position, and then cutting the section bar through the cutter assembly to obtain the section bars with different cutting angles. The utility model has simple structure and reasonable design, increases the stability of the section bar during cutting, and ensures the quality of the section bar cutting; in addition, the cutting angle of the cutter component can be adjusted according to production requirements, and the use is convenient.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the number of the limiting parts is one, and the limiting parts are fixedly installed on the placing plate and used for abutting against one end, far away from the cutter assembly, of the profile.
The beneficial effects of adopting above-mentioned further scheme are that during the cutting, support the tip that the section bar kept away from cutter unit spare through the locating part, prevent that the section bar from taking place the skew when the cutting, guarantee the quality of section bar cutting.
It should be noted that the above-mentioned solution can only be applied to the cutting of fixed-length profiles, and when the profiles with different lengths need to be cut, the position of the limiting member on the resting plate needs to be changed.
Furthermore, the quantity of locating part is one, locating part fixed mounting on one side of shelving board to along the length direction extension of shelving board, be used for supporting one side of section bar.
The beneficial effects of adopting above-mentioned further scheme are that during the cutting, form the saddle of L shape through locating part and shelving plate to support one side of section bar through the locating part, avoid the section bar to take place the skew when the cutting, guarantee the quality of section bar cutting.
It should be noted that, above-mentioned scheme is applicable to the cutting of the section bar of different length, and application range is wider, convenient to use.
Furthermore, the number of the limiting pieces is two, and one of the limiting pieces is fixedly arranged on the placing plate and used for abutting against one end, far away from the cutter assembly, of the section bar; and the other limiting part is fixedly arranged on one side of the placing plate, extends along the length direction of the placing plate and is used for abutting against one side of the section bar.
The beneficial effects of adopting above-mentioned further scheme are that during the cutting, support the tip that the section bar kept away from cutter unit through one of them locating part, form the saddle of L shape through another locating part and shelving the board simultaneously to support one side of section bar through another locating part, avoid the section bar to take place the skew when the cutting, further increase the stability of section bar when the cutting, guarantee the quality of section bar cutting.
It should be noted that the above-mentioned solution can only be applied to the cutting of fixed-length profiles, and when the profiles with different lengths need to be cut, the position of the limiting member on the resting plate needs to be changed.
Further, still the horizontal rotatable dial of installing on the base, the dial is located the below of rotary disk, and with the rotary disk can be dismantled and be connected.
Adopt above-mentioned further scheme's beneficial effect be that the rotary disk can follow the calibrated scale and rotate together to the staff in time learns the rotatory angle of rotary disk, and the precision is high.
Furthermore, the edge of the rotating disc is provided with a convex block which horizontally extends along the radial direction of the rotating disc, a clamping groove is formed in the convex block, a clamping block matched with the clamping groove is fixedly connected to the dial disc, and the clamping block is clamped into the clamping groove to connect the rotating disc and the dial disc.
Adopt above-mentioned further scheme's beneficial effect to go into the draw-in groove through the fixture block card in to connect rotary disk and calibrated scale, simple structure, easy dismounting.
Furthermore, a handle is fixedly connected to the dial.
The beneficial effect of adopting above-mentioned further scheme is that make things convenient for artifical manual operation rotary disk and calibrated scale, labour saving and time saving.
Further, the cutter assembly comprises a mounting seat and a cutter piece, the mounting seat is fixedly mounted on the rotating disc, and the cutter piece can be mounted on the mounting seat in a vertically-overturning manner.
Adopt above-mentioned further scheme's beneficial effect be that whole cutter unit spare can rotate along with the rotary disk level, and simultaneously, cutter spare can overturn from top to bottom in order to cut the section bar, convenient to use.
Further, a cutter groove matched with the cutter piece is formed in the rotating disc.
The beneficial effect of adopting above-mentioned further scheme is that during the cutting, the cutter groove avoids destroying the rotary disk with the cutter cooperation in the cutter spare.
Further, the limiting piece is a limiting plate.
The beneficial effect who adopts above-mentioned further scheme is simple structure, can play good limiting displacement.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the cutting tool comprises a base, 2, a rotating disk, 3, a placing plate, 4, a limiting part, 5, a dial, 6, a bump, 7, a handle, 8, a cutter groove, 9 and a cutter assembly.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, the utility model provides a section bar cutting and blanking tool, which comprises a base 1, a rotary disk 2, a cutter assembly 9 and a laying plate 3 for placing the section bar to be cut, wherein the rotary disk 2 is horizontally and rotatably arranged on the base 1, and the cutter assembly 9 is fixedly arranged on the edge of the rotary disk 2 in a bolt or welding manner; the shelving plate 3 is horizontally and fixedly arranged on the base 1 in a welding mode, one end of the shelving plate extends to the upper part of the rotating disk 2, and the other end of the shelving plate horizontally extends to one side of the base 1; at least one limiting part 4 used for limiting the section to be cut is fixedly arranged on the placing plate 3. In the process of cutting the section bar, firstly, manually placing the section bar to be cut on the placing plate 3, and simultaneously limiting the section bar through the limiting piece 4 to ensure that the section bar is placed in order; secondly, the rotating disc 2 is manually rotated, the cutter assembly 9 is driven to rotate to a set position, and then the section bar is cut through the cutter assembly 9, so that the section bars with different cutting angles are obtained. The utility model has simple structure and reasonable design, increases the stability of the section bar during cutting, and ensures the quality of the section bar cutting; in addition, the cutting angle of the cutter component can be adjusted according to production requirements, and the use is convenient.
Example 1
On the basis of the above structure, in this embodiment, the limiting member 4 is a limiting plate, and is simple in structure and capable of playing a good limiting role.
The above-mentioned limiting member 4 can be fixedly connected with the resting plate 3 by means that can be conceived by those skilled in the art, such as welding or bolting, so as to facilitate the assembly and disassembly.
Example 2
On the basis of the first embodiment, in the present embodiment, the number of the limiting members 4 is one, and the limiting members 4 are fixedly installed on the resting plate 3 and used for abutting against one end of the profile away from the cutter assembly. During cutting, the end part of the section bar, far away from the cutter assembly 9, is abutted against through the limiting part, the other end of the section bar extends to the upper part of the rotating disc 2, the section bar is prevented from deviating during cutting, and the cutting quality of the section bar is guaranteed.
The limiting piece 4 can be a straight plate which is perpendicular to the placing plate 3 and welded on the placing plate 3; it is also possible to use L-shaped plates, one end of which extends horizontally along the surface of the resting plate 3 and the other end extends vertically along the other side of the resting plate 3, increasing the stability of the profile.
Besides the above structure, the limiting part 4 can also adopt a limiting block, but the material consumption of the limiting block is more.
It should be noted that the above solution can only be applied to cutting of fixed-length profiles, and when it is necessary to cut profiles of different lengths, it is necessary to change the position of the limiting member 4 on the resting plate 3.
Example 3
On the basis of the first embodiment, in the present embodiment, the number of the limiting members 4 is one, and the limiting members 4 are fixedly installed on one side of the resting plate 3 and extend along the length direction of the resting plate 3 for abutting against one side of the profile. During cutting, the limiting part 4 and the shelving plate 3 form an L-shaped supporting platform, and the limiting part 4 abuts against one side of the section bar, so that the section bar is prevented from deviating during cutting, and the cutting quality of the section bar is ensured.
The limiting member 4 may be welded to one side of the resting plate 3, or may be welded to the upper surface of the resting plate 3.
Besides the above embodiment, a plurality of limiting blocks can be adopted to replace the limiting member 4, and the plurality of limiting blocks are uniformly arranged along the length direction of the shelving plate 3 at intervals.
It should be noted that, above-mentioned scheme is applicable to the cutting of the section bar of different length, and application range is wider, convenient to use.
Example 4
On the basis of the first embodiment, in the present embodiment, the number of the limiting members 4 is two, wherein one of the limiting members 4 is fixedly installed on the resting plate 3 and is used for abutting against one end of the profile, which is far away from the cutter assembly; the other limiting member 4 is fixedly installed on one side of the resting plate 3 and extends along the length direction of the resting plate 3 for abutting against one side of the profile. During cutting, the end part of the section bar, which is far away from the cutter component 9, is abutted against the end part of the section bar through one limiting part 4, meanwhile, an L-shaped supporting platform is formed through the other limiting part 4 and the placing plate 3, and the other limiting part 4 is abutted against one side of the section bar, so that the section bar is prevented from being deviated during cutting, the stability of the section bar during cutting is further improved, and the cutting quality of the section bar is ensured.
One of the limiting members 4 can be a straight plate, and the straight plate is perpendicular to the placing plate 3 and welded on the placing plate 3; it is also possible to use L-shaped plates, one end of which extends horizontally along the surface of the resting plate 3 and the other end extends vertically along the other side of the resting plate 3, increasing the stability of the profile.
The other limiting member 4 may be welded to one side of the resting plate 3 or to the upper surface of the resting plate 3.
Besides the above embodiment, a plurality of limiting blocks can be used to replace another limiting member 4, and the plurality of limiting blocks are uniformly arranged along the length direction of the shelving plate 3 at intervals.
It should be noted that the above solution can only be applied to cutting of fixed-length profiles, and when it is necessary to cut profiles of different lengths, it is necessary to change the position of the limiting member 4 on the resting plate 3.
Example 5
On the basis of the structure, in the embodiment, the base 1 is further provided with the dial 5 which is horizontally and rotatably arranged, and the dial 5 is positioned below the rotating disk 2 and detachably connected with the rotating disk 2. During the regulation, rotary disk 2 can follow calibrated scale 5 and rotate together to the staff in time learns the pivoted angle of rotary disk 5, and the precision is high.
The diameter of the dial 5 can be equal to that of the rotating disc 2, and the scale marks of the scales 5 can be arranged on the outer circumferential edge of the dial 5, so that the staff can observe the scales conveniently; the diameter of the dial 5 can also be larger than that of the rotating disk 2, and the dial and the rotating disk are coaxially arranged, at the moment, the scale marks on the dial 5 can be arranged on the outer circumference of the dial or on the position, close to the edge, of the upper surface of the dial, so that the dial is convenient for workers to observe.
In addition, the connection mode of the dial 5 and the rotating disk 2 with the base 1 is various, for example, a rotating shaft is vertically arranged at the center of the base 1, the lower end of the rotating shaft is rotatably connected with the base 1, a limiting ring is fixedly sleeved at the upper end of the rotating shaft, and the dial 5 and the rotating disk 2 are coaxially sleeved on the rotating shaft from bottom to top.
The base 1 can also be provided with a mounting groove with two opposite sides opened, the other two opposite sides of the mounting groove are relatively provided with bayonets, the edge of the dial 5 and the edge of the rotating disk 2 are clamped into the two bayonets, and the two bayonets can not be separated from each other but can be horizontally rotated.
When the dial 5 does not exist, the rotating disc 2 is manually rotated manually, and the cutter assembly 9 is driven to rotate by a certain angle, so that the cutting requirements of different sectional materials are met.
Besides the scheme, the dial 5 can be horizontally and fixedly arranged on the base 1 and is integrally formed with the base 1, the structure is simple, and the rotating disc 2 is arranged on the base 1 through a rotating shaft; when the section bar is cut, when the cutting angle needs to be adjusted, the manual operator rotates the disc 2 and the cutter assembly 9, and the base 1 is rotated to a set angle, so that the section bar and the cutter assembly 9 form a certain angle.
On the basis of the scheme, when the dial 5 is fixedly arranged, a plurality of clamping blocks are uniformly arranged on the circumferential surface of the dial at intervals along the circumferential direction of the dial, and the clamping blocks are respectively matched with clamping grooves in the convex blocks 6 on the rotating disc 2 to realize positioning.
Example 6
On the basis of the fifth embodiment, in the present embodiment, the edge of the rotating disc 2 is provided with the bump 6 horizontally extending along the radial direction thereof, and the bump 6 and the rotating disc 2 are integrally formed, so that the structure is simple; the bump 6 is provided with a clamping groove which is formed by the inward concave of the surface of the clamping block 6, can be a clamping groove which penetrates through the bump from top to bottom and can also be a clamping groove with a closed upper end; the dial 5 is fixedly connected with a clamping block matched with the clamping groove, and the clamping block is clamped in the clamping groove to connect the rotating disc 2 and the dial 5. During connection, the clamping block is clamped into the clamping groove to connect the rotating disc 2 and the dial 5, and the structure is simple and the assembly and disassembly are convenient.
In addition to the above embodiments, the dial plate 5 and the rotary plate 2 may be connected by other connecting methods, such as bolts, and in this case, screw holes for matching with the bolts are respectively provided on the dial plate 5 and the rotary plate 2.
Example 7
On the basis of the fifth embodiment, in the present embodiment, the handle 7 is fixedly connected to the dial 5, so that the rotating disc 2 and the dial 5 can be conveniently operated manually, and time and labor are saved.
One end of the handle 7 can be directly welded with the dial 5, and other connection modes can also be adopted, for example, one end of the handle 7 is provided with a thread, the circumference of the dial 5 is provided with a thread groove, and one end of the handle 7 is in threaded connection with the thread groove.
In addition, in order to increase the comfort of the hand of the worker during the operation, the other end of the handle 7 is covered with a soft layer, such as a rubber layer, which is fixedly connected by an adhesive.
Example 8
On the basis of above-mentioned structure, in this embodiment, the cutter subassembly includes mount pad and cutter spare, and mount pad fixed mounting adopts welded bolted connection usually on rotary disk 2, and the cutter spare can be about installing on the mount pad of upset, and this partial structure is prior art, and is as good as with the cutter structure on the ordinary cutting machine, and concrete structure and principle are no longer repeated here. The whole cutter component 9 can horizontally rotate along with the rotating disc 2 to adjust the cutting angle; meanwhile, the cutter piece can be turned over up and down to cut the section bar, and the use is convenient.
Preferably, in the present embodiment, the rotating disc 2 is provided with a cutter groove 8 matching with the cutter in the cutter element, and the cutter groove 8 is preferably in a strip shape and is formed by the inner concave of the upper surface of the rotating disc 2. During the cutting, the cutter cooperation in cutter groove 8 and the cutter piece specifically is manual upset cutter piece downwards, and the cutter in the cutter piece is rotatory in order to cut the section bar, and the downside of cutter piece is located cutter groove 8 when the section bar cutting is accomplished, can effectively avoid cutter piece to destroy rotary disk 2.
In addition, one end of the resting plate 3 is located on one side of the cutter groove 8.
The working principle of the utility model is as follows:
in the process of cutting the section bar, firstly, manually placing the section bar to be cut on the placing plate 3, and simultaneously limiting the section bar through the limiting piece 4 to ensure that the section bar is placed in order; secondly, manually rotate rotary disk 2 through the manual work of handle 7 to drive cutter unit spare 9 and rotate to the settlement position, then start cutter unit spare 9, and manually operation cutter unit spare 9 cuts the section bar, in order to obtain the section bar of different cutting angles.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a section bar cutting unloading frock which characterized in that: the cutting device comprises a base (1), a rotating disk (2), a cutter assembly (9) and a placing plate (3) for placing a section to be cut, wherein the rotating disk (2) is horizontally and rotatably arranged on the base (1), and the cutter assembly (9) is fixedly arranged on the edge of the rotating disk (2); the placing plate (3) is horizontally and fixedly arranged on the base (1), one end of the placing plate extends to the upper part of the rotating disk (2), and the other end of the placing plate horizontally extends to one side of the base (1); at least one limiting part (4) used for limiting the section to be cut is fixedly mounted on the placing plate (3).
2. The section bar cutting unloading frock of claim 1, characterized in that: the number of the limiting parts (4) is one, and the limiting parts (4) are fixedly installed on the placing plate (3) and used for abutting against one end, far away from the cutter assembly, of the section bar.
3. The section bar cutting unloading frock of claim 1, characterized in that: the number of the limiting parts (4) is one, and the limiting parts (4) are fixedly installed on one side of the placing plate (3), extend along the length direction of the placing plate (3) and are used for abutting against one side of the section bar.
4. The section bar cutting unloading frock of claim 1, characterized in that: the number of the limiting pieces (4) is two, one of the limiting pieces (4) is fixedly arranged on the placing plate (3) and is used for abutting against one end, far away from the cutter assembly, of the section bar; and the other limiting part (4) is fixedly arranged on one side of the placing plate (3), extends along the length direction of the placing plate (3) and is used for abutting against one side of the section bar.
5. The section bar cutting blanking tool according to any one of claims 1 to 4, characterized in that: still the horizontal rotatable dial (5) of installing on base (1), dial (5) are located the below of rotary disk (2), and with rotary disk (2) can be dismantled and be connected.
6. The section bar cutting unloading frock of claim 5, characterized in that: the edge of rotary disk (2) is equipped with along its radial level lug (6) that extend, be equipped with the draw-in groove on lug (6), fixedly connected with on calibrated scale (5) with draw-in groove complex fixture block, the fixture block card is gone into in the draw-in groove, in order to connect rotary disk (2) with calibrated scale (5).
7. The section bar cutting unloading frock of claim 5, characterized in that: and a handle (7) is fixedly connected to the dial (5).
8. The section bar cutting blanking tool according to any one of claims 1 to 4, characterized in that: the cutter component (9) comprises a mounting seat and a cutter piece, the mounting seat is fixedly mounted on the rotating disc (2), and the cutter piece can be mounted on the mounting seat in a vertically-overturning manner.
9. The section bar cutting unloading frock of claim 8, characterized in that: and a cutter groove (8) matched with the cutter piece is arranged on the rotating disc (2).
10. The section bar cutting blanking tool according to any one of claims 1 to 4, characterized in that: the limiting piece (4) is a limiting plate.
CN202022007534.0U 2020-09-15 2020-09-15 Section bar cutting unloading frock Active CN213438291U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022007534.0U CN213438291U (en) 2020-09-15 2020-09-15 Section bar cutting unloading frock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022007534.0U CN213438291U (en) 2020-09-15 2020-09-15 Section bar cutting unloading frock

Publications (1)

Publication Number Publication Date
CN213438291U true CN213438291U (en) 2021-06-15

Family

ID=76323704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022007534.0U Active CN213438291U (en) 2020-09-15 2020-09-15 Section bar cutting unloading frock

Country Status (1)

Country Link
CN (1) CN213438291U (en)

Similar Documents

Publication Publication Date Title
US8353278B2 (en) Rotary stone cutting tool
CN201529866U (en) Assembling, overlap welding and processing device for shovel loader of excavator
CN206230082U (en) A kind of steel-plate cutter
CN100594097C (en) Internal grinder
CN105537995A (en) Four-axis rotating jig
KR101774247B1 (en) Movable flat machining equipment
CN213438291U (en) Section bar cutting unloading frock
CN201969914U (en) Tire mould drilling machine
CN114193260A (en) Precise trimming device for end section of spliced protective fence
CN210232027U (en) Adjustable automobile guardrail welding clamp
CN209256425U (en) A kind of motor base hydraulic tool
KR20080000476U (en) Portable milling machine
CN211759272U (en) Laser cutting table
KR20120133939A (en) Portable boring machine
CN211163313U (en) Grinding equipment for water turbine seat ring
KR200464338Y1 (en) Machining apparatus for sidewalk block
CN210677528U (en) Welding and drilling tool clamping fixture for machine tool lifting seat
CN110180992B (en) Iron casting die easy and convenient to assemble
CN208629282U (en) A kind of tool for processing aluminum materials mold
CN202388161U (en) Flip-over type cab front-low edge welding fixture
CN206779438U (en) The cold composite hammer head process units of mine rich chromium cast iron
CN112549327A (en) Gantry stone cutting machine capable of quickly replacing blades
CN204486890U (en) Ordinary gantry planer inner arc shaping device
CN217859079U (en) Multi-angle positioning type clamping tool for plate cutting saw
CN210048793U (en) Rotary workbench with inclination angle

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant