CN106319171A - Forged molten aluminum wheel hub cooling and lifting system - Google Patents

Forged molten aluminum wheel hub cooling and lifting system Download PDF

Info

Publication number
CN106319171A
CN106319171A CN201610980089.1A CN201610980089A CN106319171A CN 106319171 A CN106319171 A CN 106319171A CN 201610980089 A CN201610980089 A CN 201610980089A CN 106319171 A CN106319171 A CN 106319171A
Authority
CN
China
Prior art keywords
lifting
wheel hub
fixedly mounted
alignment pin
conveying roller
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.)
Granted
Application number
CN201610980089.1A
Other languages
Chinese (zh)
Other versions
CN106319171B (en
Inventor
王铁钢
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.)
Zhaoyang Technology Wuhan Co ltd
Original Assignee
TIANJIN SUNRISE TECHNOLOGY 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 TIANJIN SUNRISE TECHNOLOGY Co Ltd filed Critical TIANJIN SUNRISE TECHNOLOGY Co Ltd
Priority to CN201610980089.1A priority Critical patent/CN106319171B/en
Publication of CN106319171A publication Critical patent/CN106319171A/en
Application granted granted Critical
Publication of CN106319171B publication Critical patent/CN106319171B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62Quenching devices
    • C21D1/63Quenching devices for bath quenching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/34Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)

Abstract

The invention relates to a forged molten aluminum wheel hub cooling and lifting system, which comprises a support frame, a lifting cylinder, a lifting basket, lifting guide plates and a translation device, wherein a strip-shaped pool is arranged beside a wheel hub conveying roll and is parallel to the conveying roll, the support frame is crossed above the pool and the conveying pool, the inner side of the bottom of the support frame is fixedly arranged in the pool, the outer side of the bottom of the support frame is fixedly arranged on the ground outside the wheel hub conveying roll, the translation device is arranged at the top of the support frame above the conveying roll, the two lifting guide plates are symmetrically fixedly arranged on two side walls of the support frame on the side of the pool in parallel, the lifting basket is arranged in a guide hole between the two lifting guide plates in a sliding manner, and the wheel hub is placed in the lifting basket. The system completes the full process of water level lifting, water pouring, overturning and translation to the conveying roll through the matching of three positioning pins and two sliding shafts, and the structural design is scientific and reasonable and the matching is perfect.

Description

A kind of forging and stamping liquid aluminium wheel hub cooling lifting system
Technical field
The invention belongs to forging and stamping field, relate to aluminium wheels, especially a kind of forging and stamping liquid aluminium wheel hub cooling lifting system.
Background technology
Liquid aluminium wheel hub needs Cooling Quenching after forging forming, it is common that is put into by wheel hub in cold water, takes out the water surface, must Must internal water be poured out, this operation is had been manually done by people, cool time and the placed angle of wheel hub, the bad control in position.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of automaticity is high, safe and reliable Forging and stamping liquid aluminium wheel hub cooling lifting system.
The present invention solves technical problem and be the technical scheme is that
A kind of forging and stamping liquid aluminium wheel hub cooling lifting system, including bracing frame, lifting cylinder, lifting basket, promote guide plate and Traverse Displacement Unit, in the pond of the side of wheel hub conveying roller installation one parallel with conveying roller strip, upper at pond and conveying roller Side is across installing a bracing frame, and the bottom inside of bracing frame is packed in pond, and outside is packed in the ground outside wheel hub conveying roller On face, Traverse Displacement Unit is installed at the bracing frame top above conveying roller, and the bracing frame two side Parallel Symmetric in side, pond is fixedly mounted with Two promote guide plates, two promote that guide plates are vertical with pond, in immersion pond, bottom, be the most vertically shaped with two on each lifting guide plate Pilot hole, two pilot hole parallel interval, near conveying roller for the first pilot hole, away from conveying roller for the second pilot hole, The top of the second pilot hole is shaped with the extension of the arc to the first pilot hole lateral bend, and two promote the pilot hole mirror image on guide plate Symmetry, promotes, two, the lifting basket that is slidably installed in pilot hole between guide plate, places wheel hub, in the both sides promoting basket in promoting basket Corresponding first pilot hole is fixedly mounted with the first sliding axle, corresponding second pilot hole is fixedly mounted with the second sliding axle, is fixedly mounted with between two sliding axles Lift shaft, is all connected with the top of a lifting cylinder in each lift shaft, and the cylinder body of two lifting cylinders tilts to be packed in bracing frame Top, above the lateral surface pond promoting guide plate, corresponding first sliding axle installs the first alignment pin, and corresponding second slides Axle installs the second alignment pin, installs the 3rd alignment pin between two alignment pins, and the 3rd alignment pin positions the first sliding axle.
And, the first described alignment pin and the second locating pin structure are identical, all include rotary cylinder, dibit alignment pin, Rotary cylinder is fixed on the sidewall promoting guide plate by support, and rotary cylinder drives dibit alignment pin, the arc of dibit alignment pin Groove makes lifting basket sliding axle out of service.
And, the 3rd described alignment pin includes positioning cylinder, swing shaft torr and rotating shaft, turns promoting to be fixedly mounted with on guide plate Axle, in rotating shaft be set with swing shaft torr middle part, one end of swing shaft torr is fixedly mounted with the top of positioning cylinder and is connected, the other end and First sliding axle coordinates, and swing shaft torr is with rotating shaft for axle rotation under the promotion of positioning cylinder.
And, described Traverse Displacement Unit includes leading screw, spindle motor, screw slider, wheel hub lancet and lancet lifting cylinder, Bracing frame end face above wheel hub conveying roller is parallel with conveying roller is fixedly mounted with a leading screw, and one end of this leading screw connects spindle motor, On leading screw, engagement connects screw slider, is fixedly mounted with a transverse slat in the bottom surface of screw slider, carries at the vertical plug-in mounting in the middle part of transverse slat one Hook lifting cylinder, it is the lancet of L-shaped that the top, bottom of lancet lifting cylinder connects a cross section, in the both sides of lancet lifting cylinder, Between lancet and transverse slat, symmetry is fixedly mounted with two auxiliary vertical rods.
Advantages of the present invention and good effect be:
1, native system is by by three alignment pins and the cooperation of two sliding axles, completes from water surface lifting, pouring, turns over Turning, be laterally moved to the overall process of conveying roller, scientific structure design is reasonable, coordinates perfection.
2, when wheel hub is put into rollgang, towards transferring on rollgang at the bottom of wheel hub, in order to follow-up wheel hub detects;Equipment Automatically running, use and do communication, automatic linkage controls;
3, whole process is automatically controlled by PLC, reaches unmanned, it is ensured that wheel hub quenching quality.It addition, it is each cooled Cheng Douke carries out time adjustment.Reach optimum state.
Accompanying drawing explanation
Fig. 1 is the structural representation (remove outside and promote guide plate) of the present invention;
Fig. 2 is the structural representation of the present invention;
Fig. 3 is the structure chart of three alignment pins;
Fig. 4 is the 3rd step working state schematic representation;
Fig. 5 is the 4th step working state schematic representation;
Fig. 6 is the 5th step working state schematic representation;
Fig. 7 is the 6th step working state schematic representation.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings and by specific embodiment, and following example are descriptive , it not determinate, it is impossible to limit protection scope of the present invention with this.
A kind of forging and stamping liquid aluminium wheel hub cooling lifting system, including bracing frame 5, lifting cylinder 22, lifting basket 15, promotes and leads Plate 21 and Traverse Displacement Unit, in the pond 20 of the side of wheel hub conveying roller 9 installation one parallel with conveying roller strip, in pond with defeated Sending the top of roller across installing a bracing frame, support frame as described above is cuboid framework, and the bottom inside of bracing frame is packed in pond In, outside is packed on the ground outside wheel hub conveying roller.Traverse Displacement Unit is installed at bracing frame top above conveying roller, at water The bracing frame two side Parallel Symmetric of side, pond is fixedly mounted with two lifting guide plates, two promotes that guide plates are vertical with pond, in immersion pond, bottom, The most vertically being shaped with two pilot holes on each lifting guide plate, two pilot hole parallel interval, near leading for first of conveying roller To hole 18, away from conveying roller for the second pilot hole 19, the top of the second pilot hole is shaped with the arc to the first pilot hole lateral bend The extension 19-1 of shape.Two promote the pilot hole specular on guide plate.Promote two and in pilot hole, be slidably installed one between guide plates Promote basket, in promoting basket, place wheel hub 17.In the both sides promoting basket, corresponding first pilot hole is fixedly mounted with the first sliding axle 13, correspondence Second pilot hole is fixedly mounted with the second sliding axle 14, is fixedly mounted with lift shaft 16 between two sliding axles, is all connected with one in each lift shaft The top of lifting cylinder, the cylinder body of two lifting cylinders tilts to be packed in the top of bracing frame.In the lateral surface pond promoting guide plate Corresponding first sliding axle in top the first alignment pin 10 is installed, corresponding second sliding axle installs the second alignment pin 12, in two location Installing the 3rd alignment pin 11 between pin, the 3rd alignment pin positions the first sliding axle.
The first described alignment pin and the second locating pin structure are identical, all include dibit alignment pin 12-1, rotary cylinder 12- 2 and support 12-3, it is fixedly mounted with support at the sidewall promoting guide plate, support is fixedly mounted with rotary cylinder, the output shaft of rotary cylinder is even Connecing one end of dibit alignment pin, the other end at dibit alignment pin is shaped with the arc groove for holding sliding axle, rotary cylinder Driving dibit alignment pin, the arc groove of dibit alignment pin makes lifting basket sliding axle out of service.
The 3rd described alignment pin includes positioning cylinder 11-1, swing shaft torr 11-3 and rotating shaft 11-2, is promoting on guide plate Being fixedly mounted with rotating shaft, be set with the middle part of swing shaft torr in rotating shaft, one end of swing shaft torr is fixedly mounted with the top of positioning cylinder and is connected, separately One end coordinates with the first sliding axle.Swing shaft torr is with rotating shaft for axle rotation under the promotion of positioning cylinder.
Described Traverse Displacement Unit includes leading screw 3, spindle motor 4, screw slider 2, wheel hub lancet 8 and lancet lifting cylinder 1, Bracing frame end face above wheel hub conveying roller is parallel with conveying roller is fixedly mounted with a leading screw, and one end of this leading screw connects spindle motor, On leading screw, engagement connects screw slider, is fixedly mounted with a transverse slat 6 in the bottom surface of screw slider, carries at the vertical plug-in mounting in the middle part of transverse slat one Hook lifting cylinder, it is the lancet of L-shaped that the top, bottom of lancet lifting cylinder connects a cross section, in the both sides of lancet lifting cylinder, Between lancet and transverse slat, symmetry is fixedly mounted with two auxiliary vertical rods 7.Lancet is by lancet lifting cylinder is vertically movable, laterally move by slide block Dynamic.
The work process of the present invention includes following five steps:
1, process during pond put into by wheel hub;
2, wheel hub lifting process;
3, wheel hub mouth down tilting procedure;
4, wheel hub mouth placement process upward;
5, wheel hub is traversing and moves down placement rollgang process.
Idiographic flow is:
The first step: wheel hub is put in lifting basket by mechanical hand;
Second step: lifting cylinder moves down, puts wheel hub and promotes to enter in the key in pond, put in place and provide signal, (as shown in Figure 2);
3rd step: the cool time terminates, provides signal, and lifting cylinder moves, and puts wheel hub lifting basket and goes out the water surface, arrives and only stop Position, (as shown in Figure 4);
4th step: open the first alignment pin, lifting cylinder rises, and promotes basket and rotates to wheel hub for the center of circle with the second alignment pin Turn forward 15 ° and pin to the 3rd alignment pin, (as shown in Figure 5);
5th step: then, with the 3rd alignment pin as center of rotation, opens the second alignment pin, will put wheel hub and promote basket reversion Return 105 °, provide signal, (as shown in Figure 6) at the bottom of wheel hub downwards;
6th step: receive bottom signal lancet traversing insertion wheel hub, mentions, traversing (promotes above rollgang simultaneously Basket returns to connect hub positions), the most traversing lancet is displaced downwardly to below rollgang, and wheel hub is put on rollgang, and wheel hub is removed. Lancet rises to take hub positions.Cooling cycle terminates.Wait that next process starts, (as shown in Figure 7).
Promoting basket return course: lifting cylinder is moved downward to the first alignment pin position, provide signal, lifting cylinder stops Mobile, the 3rd alignment pin is opened, and the first alignment pin puts in place, and lifting cylinder is displaced downwardly to the second alignment pin position again, and lifting cylinder stops Only running, open the first alignment pin and the second alignment pin, lifting cylinder is restarted and is displaced downwardly to connect hub positions, prepares to host computer Good signal.Wait that next cooling cycle starts.
Whole process is automatically controlled by PLC, reaches unmanned, it is ensured that wheel hub quenching quality.It addition, each cooling procedure All can carry out time adjustment.Reach optimum state.
Above-described is only the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art For, on the premise of without departing from inventive concept, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention Scope.

Claims (4)

1. a forging and stamping liquid aluminium wheel hub cooling lifting system, it is characterised in that: include bracing frame, lifting cylinder, lifting basket, carry Rise guide plate and Traverse Displacement Unit, in the pond of the side of wheel hub conveying roller installation one parallel with conveying roller strip, in pond with defeated Sending the top of roller across installing a bracing frame, the bottom inside of bracing frame is packed in pond, and outside is packed in wheel hub conveying roller On the ground in outside, Traverse Displacement Unit is installed at the bracing frame top above conveying roller, parallel in the bracing frame two side of side, pond Symmetry is fixedly mounted with two lifting guide plates, two promotes that guide plates are vertical with pond, in immersion pond, bottom, the most vertical on each lifting guide plate Be shaped with two pilot holes, two pilot hole parallel interval, near conveying roller for the first pilot hole, away from conveying roller for second Pilot hole, the top of the second pilot hole is shaped with the extension of the arc to the first pilot hole lateral bend, and two promote leading on guide plate To hole specular, promote, two, the lifting basket that is slidably installed in pilot hole between guide plate, in promoting basket, place wheel hub, promoting The both sides of basket are corresponding, and first pilot hole is fixedly mounted with the first sliding axle, corresponding second pilot hole is fixedly mounted with the second sliding axle, at two sliding axles Between be fixedly mounted with lift shaft, each lift shaft is all connected with the top of a lifting cylinder, the cylinder body of two lifting cylinders tilts to be fixedly mounted with At the top of bracing frame, above the lateral surface pond promoting guide plate, corresponding first sliding axle installs the first alignment pin, corresponding Second sliding axle installs the second alignment pin, installs the 3rd alignment pin, the 3rd alignment pin location the first slip between two alignment pins Axle.
Lifting system the most according to claim 1, it is characterised in that: the first described alignment pin and the second locating pin structure Identical, all include rotary cylinder, dibit alignment pin, rotary cylinder is fixed on the sidewall promoting guide plate, rotary cylinder by support Driving dibit alignment pin, the arc groove of dibit alignment pin makes lifting basket sliding axle out of service.
Lifting system the most according to claim 1, it is characterised in that: the 3rd described alignment pin includes positioning cylinder, pendulum Rotating shaft torr and rotating shaft, be fixedly mounted with rotating shaft promoting on guide plate, is set with the middle part of swing shaft torr in rotating shaft, one end of swing shaft torr with The top of positioning cylinder is fixedly mounted with connection, and the other end and the first sliding axle coordinate, swing shaft torr with rotating shaft for axle at positioning cylinder Promote lower rotation.
Lifting system the most according to claim 1, it is characterised in that: described Traverse Displacement Unit include leading screw, spindle motor, Screw slider, wheel hub lancet and lancet lifting cylinder, bracing frame end face above wheel hub conveying roller is parallel with conveying roller to be fixedly mounted with One leading screw, one end of this leading screw connects spindle motor, and on leading screw, engagement connects screw slider, is fixedly mounted with in the bottom surface of screw slider One transverse slat, at the middle part of transverse slat vertical plug-in mounting one lancet lifting cylinder, it is L that the top, bottom of lancet lifting cylinder connects a cross section The lancet of shape, between the both sides of lancet lifting cylinder, lancet and transverse slat, symmetry is fixedly mounted with two auxiliary vertical rods.
CN201610980089.1A 2016-11-08 2016-11-08 One kind forging and stamping liquid aluminium wheels cooling lifting system Active CN106319171B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610980089.1A CN106319171B (en) 2016-11-08 2016-11-08 One kind forging and stamping liquid aluminium wheels cooling lifting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610980089.1A CN106319171B (en) 2016-11-08 2016-11-08 One kind forging and stamping liquid aluminium wheels cooling lifting system

Publications (2)

Publication Number Publication Date
CN106319171A true CN106319171A (en) 2017-01-11
CN106319171B CN106319171B (en) 2018-01-09

Family

ID=57816812

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610980089.1A Active CN106319171B (en) 2016-11-08 2016-11-08 One kind forging and stamping liquid aluminium wheels cooling lifting system

Country Status (1)

Country Link
CN (1) CN106319171B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252849A (en) * 2019-06-03 2019-09-20 马鞍山钢铁股份有限公司 A kind of coil of strip tail volume promotes collection device of tumbling
CN112936784A (en) * 2021-01-26 2021-06-11 上海天怡塑胶工业有限公司 Automatic water installation that steeps of injection molding

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684263A (en) * 1970-02-12 1972-08-15 Sola Basic Ind Inc Vacuum oil quench furnace
CN201871707U (en) * 2010-09-28 2011-06-22 秦皇岛市兴龙源金属制品有限公司 Cooling device of casting hub
CN206127361U (en) * 2016-11-08 2017-04-26 天津昭阳科技有限公司 Forge and press liquid aluminium wheel hub cooling lift system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684263A (en) * 1970-02-12 1972-08-15 Sola Basic Ind Inc Vacuum oil quench furnace
CN201871707U (en) * 2010-09-28 2011-06-22 秦皇岛市兴龙源金属制品有限公司 Cooling device of casting hub
CN206127361U (en) * 2016-11-08 2017-04-26 天津昭阳科技有限公司 Forge and press liquid aluminium wheel hub cooling lift system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252849A (en) * 2019-06-03 2019-09-20 马鞍山钢铁股份有限公司 A kind of coil of strip tail volume promotes collection device of tumbling
CN112936784A (en) * 2021-01-26 2021-06-11 上海天怡塑胶工业有限公司 Automatic water installation that steeps of injection molding
CN112936784B (en) * 2021-01-26 2022-08-05 上海天怡塑胶工业有限公司 Automatic water installation that steeps of injection molding

Also Published As

Publication number Publication date
CN106319171B (en) 2018-01-09

Similar Documents

Publication Publication Date Title
CN107096914B (en) Steel ladle whole-course covering and uncovering device and molten steel bearing device
CN202729293U (en) Vertical machine transfer device for television set production line
CN106319171A (en) Forged molten aluminum wheel hub cooling and lifting system
CN203972841U (en) The online hot-metal bottle attemperator of a kind of Molten Iron Transportation
CN206127361U (en) Forge and press liquid aluminium wheel hub cooling lift system
CN203921122U (en) A kind of marine shafting erecting device
CN207468102U (en) Convenient for pipeline carrying support of pipelines
CN103640930A (en) Automatic transfer robot applicable to automatic barrel discharging of glass fibers and working method thereof
CN103449152A (en) Steel barrel overturning device
WO2011023084A1 (en) Hydraulic lifting device for steel ladle
CN203664651U (en) Molten aluminum transfer trolley
CN214977726U (en) Multi-functional integrative car of turning to and pouring molten iron is transported to molten iron
CN106756892A (en) A kind of graphite boat boat pushing mechanism for PECVD device
CN206763905U (en) A kind of trailing type ladle stamp device
CN205132751U (en) Shallow of line wheel with elevating gear
CN212244718U (en) Opening and closing mechanism of ladle cover
CN104101215A (en) Single-arm rotation feeding device of smelting furnace
CN220480790U (en) Semi-automatic assembly fixture for automobile pipeline sheath
CN103556854A (en) Single-body column rotating-disc type multi-stage hydraulic lifting device
CN203863002U (en) Vehicle-mounted integrated ladle capping and de-capping device
CN208683837U (en) A kind of new steel plate turnover device
CN207836326U (en) Hand-operated operating device for seedbed of greenhouse
CN206200111U (en) A kind of phenolic sand molding line apparatus for pouring
CN220781744U (en) Dust removing mechanism for electroslag furnace
CN216780307U (en) Full-automatic moving and overturning trolley structure for aluminum round ingot casting equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 430058 South taizihu innovation Valley Qidi Xiexin science and Technology Innovation Park, Wuhan Economic and Technological Development Zone, Hubei Province (qdxx-q20148)

Patentee after: Zhaoyang Technology (Wuhan) Co.,Ltd.

Address before: 300350 1506g, No. 75, Chongqing Street, changqingke industry and Trade Park, Jinnan District, Tianjin

Patentee before: TIANJIN ZHAOYANG TECHNOLOGY CO.,LTD.