CN108098463A - A kind of work pieces process polishing process - Google Patents
A kind of work pieces process polishing process Download PDFInfo
- Publication number
- CN108098463A CN108098463A CN201711389253.2A CN201711389253A CN108098463A CN 108098463 A CN108098463 A CN 108098463A CN 201711389253 A CN201711389253 A CN 201711389253A CN 108098463 A CN108098463 A CN 108098463A
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- Prior art keywords
- polishing
- workpiece
- conveyer belt
- roller
- heating arrangements
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The technology field that the invention belongs to be used to be ground or polish, specifically disclose a kind of work pieces process polishing process, including a kind of sanding apparatus, completed by above-mentioned sanding apparatus to the heating of workpiece, in advance polishing, essence is polished and the process of cooling, and continuous polishing is realized in above-mentioned steps, without repeating dismounting workpiece, solve the problem of that the prior art needs to mount and dismount workpiece on grinding machine repeatedly when polishing to workpiece and causes grinding efficiency low with this.
Description
Technical field
The technology field that the invention belongs to be used to be ground or polish specifically discloses a kind of work pieces process polishing side
Method.
Background technology
The workpiece finished is just cast or forges, surface is usually very coarse, there are many burrs, in order to make the matter of workpiece
Amount improves, it is necessary to the burr of workpiece surface is eliminated, for this reason, it may be necessary to carry out polishing processing to workpiece surface.
It is typically at present that directly workpiece is mounted on grinding machine to be processed to the polishing processing of workpiece, due to the folder of grinding machine
Tool is limited, and a workpiece can only be once installed, after a grinding workpieces are complete, it is necessary to first remove the workpiece polished, then
Another workpiece for needing to polish is being installed, therefore the workpiece that can only once polish is processed in the polishing of grinding machine, inefficiency makes
Processing cost is obtained to rise.
The content of the invention
The invention discloses a kind of work pieces process polishing process, it is intended that solve the prior art in polishing operation once only
Can polish a workpiece, the problem of causing inefficiency.
The present invention basic scheme be：A kind of work pieces process polishing process, includes the following steps：
Step 1：Prepare the water-base cutting fluid 10L that concentration is 1%~5%；
Step 2：Prepare two conveyer belts, two polishing rollers, pre- workpiece polishing mechanism, a cutting fluid nozzle, for will heat
The first cylinder that air outside mechanism is drained into heating arrangements, for the air outside cabinet to be arranged to the workpiece after polishing
Second cylinder；Two conveyer belts are respectively the first conveyer belt and the second conveyer belt, two polishing rollers be respectively the first polishing roller and
Second polishing roller, the belt speed of heating arrangements conveyer belt are that the rotating speed of the polishing roller is in 1500~2000r/min；
Step 2：By described first polishing roller and second polishing roller be arranged between the first conveyer belt and the second conveyer belt and
Second polishing roller is directly over the first polishing roller；
Step 3：Start first conveyer belt and the second conveyer belt, first conveyer belt and the second conveyer belt belt speed are
0.5~1.5m/s；Start heating arrangements, heating arrangements is made to preheat 5~8min, temperature in heating arrangements is made to be maintained at 600~700
℃；Start the first polishing roller and the second polishing roller, the first polishing roller and the second polishing roller steering is identical and rotating speed
It is 1500~2000r/min；
Step 4：Workpiece is placed on the first conveyer belt；
Step 5：Workpiece passes through heating arrangements so that workpiece heat rear surface softens；
Step 6：Workpiece passes through pre- workpiece polishing mechanism so that the burr for the metal surface being softened tentatively is polished；
Step 7：Workpiece is reached between the first polishing roller and the second polishing roller, and due to the second polishing roller and the first polishing roller
Counter motion make workpiece slowly by between the first polishing roller and the second polishing roller, making to carry out essence by the workpiece tentatively polished
Polishing；
Step 8：Cutting fluid nozzle sprays cutting fluid, and cutting fluid sprays pressure in 0.5~1.5Mpa, is attached to cutting fluid
On workpiece polishing mechanism and workpiece, reduce abrasion of the workpiece polishing mechanism in bruting process, while make workpiece and workpiece polishing mechanism cooling cold
But and by the chip under polishing wash out；
Step 9：Workpiece reaches the second conveyer belt, and workpiece polishing mechanism drives the second cylinder to arrange cabinet outer low temperature gas to work
Part further makes workpiece cool down, and workpiece polishing mechanism drives the first cylinder to arrange the hot-air of cabinet inside into heater box simultaneously, protects
High temperature in heater box is held, reduces scattering and disappearing for heat；
Step 10：Workpiece is taken out, completes polishing.
The technical principle and advantageous effect of the present invention is：
In step 3 and step 5 of the present invention, first heating arrangements are preheated so that heating arrangements when workpiece passes through heating arrangements
Temperature workpiece surface is softened enough so that workpiece surface hardness reduce so that subsequent polishing is easier to workpiece
The burr removal on surface.
In step 6 of the present invention, the pre- workpiece polishing mechanism contact of workpiece by heating so that workpiece is passing through pre- workpiece polishing mechanism
When, surface is tentatively polished so that the burr of workpiece surface grinds off a part before smart polishing is carried out, and is then carrying out step 7
When have already passed through the workpiece tentatively polished and carry out smart polishing, so that the burr of workpiece surface is thorough under the action of being polished for a plurality of times
It grinds off, and in bruting process, step 8 constantly sprays cutting fluid to workpiece polishing mechanism so that the first and second polishing rollers are being beaten
Abrasion during mill reduces, while reduces the heat that friction generates.
Hot-air in cabinet is drained into heating arrangements by the first cylinder in step 9 of the present invention, and the second cylinder is by cabinet
Outer cold air is arranged to the workpiece by polishing so that the hot-air in cabinet is discharged into heating arrangements the promotion that is recycled and adds
The heat engine structure efficiency of heating surface is scattered and disappeared caused energy consumption so as to reduce heating arrangements heat, and by the workpiece table of polishing
The metal powder that face leaves is entrained by the flow of air so that workpiece keeps clean, simultaneously because blowing to the gas of workpiece as outside cabinet
Cold air, therefore the effect of cooling can be played to workpiece, prevent workpiece surface keep the state of hot mastication for a long time and
Deformation.
The present invention only constantly can constantly polish to workpiece needs on the first conveyer belt by placement workpiece, and nothing
Repeated disassembled and assembled workpiece is needed, so as to greatly improve grinding efficiency.
Further, the concentration of the water-base cutting fluid is preferably 3%~5%.During finishing between workpiece polishing mechanism and workpiece
Friction it is more violent, therefore improve the concentration of water-base cutting fluid, with it is better reduce rub when the heat that generates.
Further, the first conveyer belt belt speed is slower than the second conveyer belt, and the first conveyer belt belt speed is preferably 0.5m/
S~1.0m/s, the second conveyer belt belt speed is preferably 1.0m/s~1.5m/s.When workpiece is by the first conveyer belt belt speed compared with
It is low so that workpiece is when by pre- workpiece polishing mechanism and workpiece polishing mechanism, speed is slower so that workpiece is fully polished, the second conveyer belt
Belt speed is very fast so that workpiece can rapidly send out cabinet and complete polishing.
Further, temperature is preferably 650~700 DEG C in heating arrangements.650~700 DEG C of temperature so that workpiece surface is soft
Change without whole softening.
Further, cutting fluid sprays pressure preferably in 1.0~1.5Mpa.It will be after polishing by the surge of cutting fluid
Chip is swept away from workpiece.
Further, the pre- workpiece polishing mechanism is arranged in heating arrangements.So that the workpiece being heated to soften is polished at once with pre-
Mechanism contacts are polished in advance.
Description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present invention；
Fig. 2 is the schematic diagram of heating arrangements of the present invention；
Fig. 3 is the right view of workpiece polishing mechanism of the present invention.
Specific embodiment
It is further described below by specific embodiment：
Reference numeral in Figure of description includes：Cabinet 1, the first conveyer belt 2, the second conveyer belt 3, heating arrangements 4,
A dozen grinding rollers 5, second polishing roller 6, First piston bar 7, second piston bar 8, the first cylinder 9, the second cylinder 10, downtake pipe
11st, the second air intake duct 12, the first air intake duct 13, second exhaust pipe 14, the first locating sleeve 15, the second locating sleeve 16, first
Connecting rod 17, second connecting rod 18, belt 19, the first grinding disc 20, the 3rd grinding disc 21, spring 22, heater box 23, the first driving wheel
24th, the second driving wheel 25, workpiece 26, locating rod 27, the first turning set 28, the second turning set 29.
Embodiment is substantially as shown in Figure 1：A kind of work pieces process polishing process, when it is implemented, step is as follows：
Step 1：Prepare the water-base cutting fluid 10L that concentration is 4%；
Step 2：Prepare a sanding apparatus, the sanding apparatus includes cabinet 1, pacifies successively from left to right inside cabinet 1
Equipped with the first conveyer belt 2, workpiece polishing mechanism and the second conveyer belt 3.
As shown in Fig. 2, heating arrangements 4 are fixedly installed on the first conveyer belt 2, heating arrangements 4 are including heater box 23 and admittedly
Dingan County is loaded on the heating wire of 23 inner wall of heater box.
Pre- workpiece polishing mechanism includes be connected respectively with left wall, right wall and the upper wall inside heater box 23 by spring 22 first
Grinding disc 20, the second grinding disc and the 3rd grinding disc 21.
As shown in figure 3, workpiece polishing mechanism includes the first polishing polishing roller 6 of roller 5 and second, the first polishing roller 5 and first transmits
Band 2 is installed on same level, and the second polishing roller 6 is installed at 5 surface 50cm of the first polishing roller and flat with the first polishing roller 5
It goes, cutting fluid nozzle is installed on the cabinet 1 directly over the second polishing roller 6, first, second polishing roller 6 is installed with
It is each passed through the first transmission shaft and second driving shaft of first, second polishing roller, 6 central axes, the first transmission shaft and second driving shaft
Right end is rotatablely connected with cabinet 1, and the first transmission shaft right end stretches out cabinet 1 and is fixedly connected with motor, the first polishing 5 left end of roller
Be installed with the first driving wheel 24 on transmission shaft, on the transmission shaft of the second polishing 6 left end of roller with 24 corresponding position of the first driving wheel
It puts and is installed with the second driving wheel 25, belt 19 is installed between the first driving wheel 24 and the second driving wheel 25 and passes through belt
19 transmissions, inner wall has been bolted locating rod 27 on cabinet 1, integrally formed with the first turning set 28 and second turn in locating rod 27
Dynamic set 29, the first transmission shaft between the first turning set 28 and the first polishing 5 and first driving wheel 24 of roller are rotatablely connected, second turn
Second driving shaft between dynamic 29 and second polishing 6 and second driving wheel 25 of roller of set is rotatablely connected, and first is hinged on 24 side walls
Connecting rod 17 is hinged with second connecting rod 18 on second driving wheel, 25 side wall, and motor is fixedly installed in 1 shell of cabinet.
Cooling body includes being fixedly installed in the first cylinder 9 on the cabinet 1 of workpiece polishing mechanism above and below and the respectively
Two cylinders 10 slidably connect First piston bar 7 and second piston bar 8 in 10 cylinder barrel of first cylinder 9 and the second cylinder respectively, and
The upper surface of one cylinder 9 and the lower face of the second cylinder 10 have been respectively fixedly connected with the first locating sleeve 15 and the second locating sleeve
16, First piston bar 7 and second piston bar 8 are slidably connected respectively in the first locating sleeve 15 and the second locating sleeve 16,
One piston rod 7 and second piston bar 8 are hinged with first connecting rod 17 and second connecting rod 18 respectively.The cylinder barrel of first cylinder 9 and cabinet 1
Junction is fixedly connected with what is stretched out the downtake pipe 11 connected with 4 inside of heating arrangements of cabinet 1 and connected with 1 inside of cabinet
Second air intake duct 12, cylinder barrel and 1 junction of cabinet of the second cylinder 10, which are fixedly connected with, stretches out cabinet 1 is connected with outside second
The second exhaust pipe 14 of air intake duct 12 and the second conveyer belt for connecting and being aligned with 1 inside of cabinet, the first air intake duct 13 and second
The check valve for only allowing air into cylinder barrel in air intake duct 12 is installed, is equipped in downtake pipe 11 and second exhaust pipe 14
The check valve that air is only allowed to be discharged out of cylinder barrel.
Wherein the first conveyer belt belt speed is 0.7m/s, and the second conveyer belt belt speed is 1.3m/s, the first polishing roller and second dozen
Roller speed is 1700r/min；
Step 3：Start the heating wire in heating arrangements 4, heating wire is made to preheat 6min so that the temperature in heater box is kept
At 670 DEG C, ensure that workpiece 26 is sufficient so that the softening of 26 surface of workpiece into temperature during heater box 23；
Step 4：Start the first conveyer belt 2 and the second conveyer belt 3, the slower belt speed of the first conveyer belt 2 causes workpiece 26 to exist
By polishing when pre- workpiece polishing mechanism and workpiece polishing mechanism with first, second, and third grinding disc 21 and the first polishing roller 5 and second
The time of contact of roller 6 extends so that polishing is more abundant；
Step 5：Start workpiece polishing mechanism, workpiece 26 is placed on 2 left end of the first conveyer belt so that workpiece 26 is passed with first
Band 2 is sent to move；
Step 6：Workpiece 26 is by heater box 23, and temperature has been subjected to preheating in heater box 23 at this time, it is sufficient to by 26 table of workpiece
Thin-skinnedization；
Step 7：Workpiece is by between the first grinding disc 20, the second grinding disc and the 3rd grinding disc 21, due to the first polishing
Piece 20, the second grinding disc and the 3rd grinding disc 21 are connected by spring 22 with 23 wall of heater box, therefore are beaten when workpiece 26 enters
When between grinding, spring 22 provides grinding disc the elastic force of negative direction when workpiece 26 promotes grinding disc so that grinding disc is adjacent to work
26 surface of part, polishes in advance to workpiece 26；
Step 8：Workpiece is polished along the first conveyer belt 2 arrival the first polishing roller 5 and second between roller 6, the first polishing roller 5
The direction of motion with transmission tape motion direction it is consistent, first polishing roller 5 and second polish roller 6 between be driven by belt 19, institute
It is opposite always with the second polishing roller 6 and first linear velocity direction of point that roller 5 contacts with workpiece 26 of polishing so that workpiece 26 is leading to
It is subject to the resistance opposite with the direction of motion from the second polishing roller 6 when crossing workpiece polishing mechanism so that the movement velocity of workpiece 26 becomes
Slowly, the time lengthening so that workpiece 26 is polished, so as to improve polishing effect, since the first polishing roller 5 is set with the first conveyer belt 2
Same level is placed in, therefore workpiece 26 is pressed under self gravitation effect on the first polishing roller 5 so that workpiece 26 and first dozen
Stiction between grinding roller 5 is more than the stiction between the second polishing roller 6 and workpiece 26, so that workpiece 26 continues edge
Former direction of motion movement, in the process since metal surface being softened by heating, the first polishing roller 5 and the
The polishing effect of two polishing rollers 6 is more thorough.
Step 9：In the workpiece polishing mechanism course of work, cutting fluid nozzle sprays cutting fluid, and cutting fluid is attached to the first polishing
Roller 5, second is polished on roller 6 and workpiece 26 so that the friction heat drop that the first polishing roller 5, second is polished between roller 6 and workpiece 26
It is low, and then play the role of reducing frictional dissipation of the first polishing polishing roller 6 of roller 5 and second in bruting process；
Step 10：Workpiece reaches the second conveyer belt 3, due to the first driving wheel 24 and the second driving wheel by workpiece polishing mechanism
Be respectively articulated with first connecting rod 17 and second connecting rod 18 on 25 side walls, first connecting rod 17 and second connecting rod 18 respectively with first piston
Bar 7 and second piston bar 8 are hinged, and First piston bar 7 and second piston bar 8 are slidably connected to the first locating sleeve 15 and the respectively
Inside two locating sleeves 16, therefore the first polishing polishing roller 6 of roller 5 and second drives 17 He of first connecting rod respectively in rotation process
Second connecting rod 18, so as to drive First piston bar 7 and second piston bar 8 along the first locating sleeve 15 and the second locating sleeve 16
Inner wall up and down reciprocatingly slides, and then realizes that the air inside cabinet 1 is sucked the first gas by the first cylinder 9 by the first air intake duct 13
It is discharged to after in 9 cylinder barrel of cylinder by downtake pipe 11 inside heating arrangements 4, the second cylinder 10 is by the second air intake duct 12 by cabinet
Air outside 1 be drawn into 10 cylinder barrel of the second cylinder after by 14 row of second exhaust pipe to the second conveyer belt 3, above-mentioned steps are not
It is disconnected to cycle and then realize the cooling to 1 inside of cabinet and workpiece 26, while air-flow blows the metal powder on 26 surface of workpiece off.
Step 11：Workpiece 26 is taken out, completes polishing.
It repeats that the continual polishing operation of multiple workpiece can be completed in above-mentioned steps.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these all do not interfere with what the present invention was implemented
Effect and practical applicability.
Claims (6)
1. a kind of work pieces process polishing process, which is characterized in that include the following steps：
Step 1：Prepare the water-base cutting fluid 10L that concentration is 1%~5%；
Step 2：Prepare two conveyer belts, two polishing rollers, pre- workpiece polishing mechanism, a cutting fluid nozzle, for by heating arrangements
The first cylinder that outer air is drained into heating arrangements, for the air outside cabinet is arranged to the workpiece after polishing second
Cylinder；Two conveyer belts are respectively the first conveyer belt and the second conveyer belt, and two polishing rollers are respectively the first polishing roller and second
Polishing roller, the belt speed of heating arrangements conveyer belt are that the rotating speed of the polishing roller is in 1500~2000r/min；
Step 2：Described first polishing roller and the second polishing roller are arranged between the first conveyer belt and the second conveyer belt and second
Roller polish directly over the first polishing roller；
Step 3：Start first conveyer belt and the second conveyer belt, first conveyer belt and the second conveyer belt belt speed are 0.5
~1.5m/s；Start heating arrangements, heating arrangements is made to preheat 5~8min, temperature in heating arrangements is made to be maintained at 600~700 DEG C；
Start the first polishing roller and the second polishing roller, the steering of the first polishing roller and the second polishing roller is identical and rotating speed is
1500~2000r/min；
Step 4：Workpiece is placed on the first conveyer belt；
Step 5：Workpiece passes through heating arrangements so that workpiece heat rear surface softens；
Step 6：Workpiece passes through pre- workpiece polishing mechanism so that the burr for the metal surface being softened tentatively is polished；
Step 7：Workpiece reach first polishing roller and second polishing roller between, and due to second polishing roller with first polish roller it is anti-
Make workpiece slowly by between the first polishing roller and the second polishing roller, making to carry out smart beat by the workpiece tentatively polished to movement
Mill；
Step 8：Cutting fluid nozzle sprays cutting fluid, and cutting fluid sprays pressure in 0.5~1.5Mpa, cutting fluid is made to be attached to polishing
In mechanism and workpiece, reduce abrasion of the workpiece polishing mechanism in bruting process, while make workpiece and workpiece polishing mechanism cooling down simultaneously
Chip under polishing is washed out；
Step 9：Workpiece reaches the second conveyer belt, and workpiece polishing mechanism drives the second cylinder to arrange cabinet outer low temperature gas to workpiece,
Further workpiece is made to cool down, workpiece polishing mechanism drives the first cylinder to arrange the hot-air of cabinet inside into heater box simultaneously, keeps
High temperature in heater box reduces scattering and disappearing for heat；
Step 10：Workpiece is taken out, completes polishing.
2. a kind of work pieces process polishing process according to claim 1, it is characterised in that：The concentration of the water-base cutting fluid
Preferably 3%~5%.
3. a kind of work pieces process polishing process according to claim 1, it is characterised in that：The first conveyer belt belt speed is slow
In the second conveyer belt, the first conveyer belt belt speed is preferably 0.5m/s~1.0m/s, and the second conveyer belt belt speed is preferably
1.0m/s~1.5m/s.
4. a kind of work pieces process polishing process according to claim 1, it is characterised in that：Temperature is preferably in heating arrangements
650~700 DEG C.
5. a kind of work pieces process polishing process according to claim 1, it is characterised in that：Cutting fluid injection pressure preferably exists
1.0~1.5Mpa.
6. according to a kind of work pieces process polishing process according to any one of claims 1 to 5, it is characterised in that：It is described pre- to beat
Grinding machine structure is arranged in heating arrangements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389253.2A CN108098463B (en) | 2017-12-21 | 2017-12-21 | workpiece machining and polishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389253.2A CN108098463B (en) | 2017-12-21 | 2017-12-21 | workpiece machining and polishing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108098463A true CN108098463A (en) | 2018-06-01 |
| CN108098463B CN108098463B (en) | 2019-12-10 |
Family
ID=62211508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711389253.2A Active CN108098463B (en) | 2017-12-21 | 2017-12-21 | workpiece machining and polishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108098463B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113187A (en) * | 2020-01-14 | 2020-05-08 | 山东钢铁股份有限公司 | Burr cleaning device |
| CN114473748A (en) * | 2021-12-24 | 2022-05-13 | 康姆罗拉有限公司 | Grinding machine for quartz ceramic production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108618A (en) * | 2015-08-21 | 2015-12-02 | 张继兰 | Casting part grinding device capable of lowering temperature |
-
2017
- 2017-12-21 CN CN201711389253.2A patent/CN108098463B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108618A (en) * | 2015-08-21 | 2015-12-02 | 张继兰 | Casting part grinding device capable of lowering temperature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113187A (en) * | 2020-01-14 | 2020-05-08 | 山东钢铁股份有限公司 | Burr cleaning device |
| CN114473748A (en) * | 2021-12-24 | 2022-05-13 | 康姆罗拉有限公司 | Grinding machine for quartz ceramic production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108098463B (en) | 2019-12-10 |
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Effective date of registration: 20200825 Address after: Room c506a-19, University Business Park, No. 99, University Road, Xuzhou hi tech Industrial Development Zone, 221000, Jiangsu Province Patentee after: Xuzhou Tiancheng Intelligent Technology Co.,Ltd. Address before: 400039 Chongqing Jiulongpo Branch City Road No. 129, building 2, No. 17-3 Patentee before: CHONGQING CHUANGYING CLEANING Co.,Ltd. |
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