CN114043387A - Sand blasting equipment for manufacturing sculpture - Google Patents
Sand blasting equipment for manufacturing sculpture Download PDFInfo
- Publication number
- CN114043387A CN114043387A CN202111612623.0A CN202111612623A CN114043387A CN 114043387 A CN114043387 A CN 114043387A CN 202111612623 A CN202111612623 A CN 202111612623A CN 114043387 A CN114043387 A CN 114043387A
- Authority
- CN
- China
- Prior art keywords
- sand blasting
- sand
- pipe
- push rod
- cavity
- 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.)
- Pending
Links
- 238000005488 sandblasting Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 37
- 239000004576 sand Substances 0.000 claims description 35
- 238000005192 partition Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims 7
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000003796 beauty Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/003—Removing abrasive powder out of the blasting machine
Abstract
The invention discloses sand blasting equipment for sculpture manufacturing, and particularly relates to the technical field of sand blasting equipment. According to the invention, the shunt pipe capable of lifting is arranged, the plurality of spray heads are arranged on the shunt pipe, and the driving part is utilized to drive the shunt pipe to lift and adjust the angle, so that multi-angle adjustment of the plurality of spray heads is realized, the sand blasting range of the equipment in the sand blasting process is improved, the sand blasting efficiency of the sculpture in the sand blasting process is improved, and the practicability is improved.
Description
Technical Field
The invention relates to the technical field of sand blasting equipment, in particular to sand blasting equipment for manufacturing sculptures.
Background
Copper sculpture is generated in the week of commerce and is a sculpture made of copper as an embryo by a method such as carving and casting.
The copper carving art (the Xiguan copper art) mainly shows that the beauty of modeling and texture ornamentation is mainly used for showing a mysterious religious subject with deterrence. The copper Buddha is one of the copper Buddha, and the copper sculpture needs to be subjected to sand blasting in the production process.
The spray heads in the existing sand blasting devices are mostly fixed, so that the sand blasting range of the spray heads is single, and the defect of low production efficiency of copper carving is caused.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a sculpture is sandblast equipment for manufacturing, includes the workstation, installs the inside box of seting up the cavity at the workstation top, the cavity bottom is the slope setting the bottom of cavity slope one side is provided with the sandblast recovery tube the cavity middle part is provided with the carousel, the carousel bottom is provided with and is used for carrying out the carousel protection piece that shelters from to the sand grain the top of carousel is provided with the sandblast mechanism of lift the top of sandblast mechanism is provided with the baffle of installing on the cavity inner wall, leave one section distance between baffle and the cavity top install the transmission device who is used for driving the driving piece that sandblast mechanism goes up and down and is connected with sandblast mechanism on the baffle, the driving piece still is used for adjusting the sandblast angle of sandblast mechanism, transmission device is arranged in transmitting the sand grain to sandblast mechanism.
In a preferred embodiment, a movably hinged box door is arranged on the side wall of the box body, and a circle of sealing ring is attached to the edge of the box door.
In a preferred embodiment, the sand blast recovery pipe extends through the tank to one side outside the tank, and a dust suction pump is connected to an end portion of the sand blast recovery pipe at one end outside the tank.
In a preferred embodiment, the carousel guard comprises a shield fixed to the bottom wall of the cavity and a mechanical seal mounted on the top end of the shield, the top of the mechanical seal being fixed to the bottom wall of the carousel.
In a preferred embodiment, the conveying mechanism comprises a pressure pump installed on a partition plate, the input end of the pressure pump is connected with a sand inlet pipe, the output end of the pressure pump is connected with a sand outlet pipe, the other end of the sand outlet pipe extends to the position below the partition plate, the end, located below the partition plate, of the sand outlet pipe is connected with a flexible hose, and the bottom end of the flexible hose is connected with a bending pipe.
In a preferred embodiment, the sandblast mechanism includes that one is the annular shunt tubes of circle, the bent tube bottom end is connected with the shunt tubes, the shunt tubes bottom is connected with a plurality of shower nozzles, the shunt tubes inboard is connected with the regulation pole that passes the shunt tubes centre of circle point.
In a preferred embodiment, the driving member includes a first push rod and a second push rod mounted on the partition plate, the first push rod and the second push rod are symmetrically arranged through a midpoint of the adjusting rod, and output shafts of the first push rod and the second push rod both extend downwards through the partition plate to one side of the adjusting rod.
In a preferred embodiment, the bottom end of the first push rod output shaft is provided with an articulated shaft and is connected to the adjusting rod through the articulated shaft, the outer wall of the adjusting rod, which is far away from the articulated shaft, is provided with a connecting plate provided with a sliding groove, the outer wall of the bottom end of the second push rod output shaft is fixed with a limiting rod extending towards the inside of the sliding groove, and the diameter of the limiting rod is the same as the inner diameter of the sliding groove.
The invention has the technical effects and advantages that:
according to the invention, the shunt pipe capable of lifting is arranged, the plurality of spray heads are arranged on the shunt pipe, and the driving part is utilized to drive the shunt pipe to lift and adjust the angle, so that multi-angle adjustment of the plurality of spray heads is realized, the sand blasting range of the equipment in the sand blasting process is improved, the sand blasting efficiency of the sculpture in the sand blasting process is improved, and the practicability is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the sandblasting mechanism of the present invention after angle adjustment.
Fig. 3 is a schematic diagram of a detailed structure a in fig. 2 according to the present invention.
The reference signs are: 1 workbench, 2 boxes, 3 sand blasting recovery pipes, 4 turntables, 5 articulated shafts, 6 sliding chutes, 7 partition plates, 8 adjusting rods, 9 connecting plates, 10 box doors, 11 dust suction pumps, 12 protective covers, 13 mechanical sealing parts, 14 pressure pumps, 15 sand inlet pipes, 16 sand outlet pipes, 17 telescopic hoses, 18 bent pipes, 19 shunt pipes, 20 spray heads, 21 first push rods, 22 second push rods and 23 limiting rods.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the sand blasting apparatus for manufacturing sculptures comprises a table 1, a box body 2 with a cavity therein is installed on the top of the table 1, the bottom of the cavity is inclined, a sand blasting recovery pipe 3 is arranged at the bottom of the inclined side of the cavity, a rotary disc 4 is arranged in the middle of the cavity, a rotary disc protection piece for shielding sand grains is arranged at the bottom of the rotary disc 4, a lifting sand blasting mechanism is arranged above the rotary table 4, a clapboard 7 arranged on the inner wall of the cavity is arranged above the sand blasting mechanism, a distance is reserved between the clapboard 7 and the top of the cavity, a driving piece for driving the sand blasting mechanism to lift and a transmission mechanism connected with the sand blasting mechanism are arranged on the clapboard 7, the driving piece is also used for adjusting the sand blasting angle of the sand blasting mechanism, and the transmission mechanism is used for transmitting sand grains to the sand blasting mechanism.
In the course of the work, the sculpture that needs sand blasting to handle is placed on carousel 4, and carousel 4 rotates and drives sculpture rotation, and the sandblast mechanism of 4 tops of carousel carries out the sandblast operation to the sculpture, and sandblast mechanism is at the in-process of sandblast, and the driving piece can drive sandblast mechanism and go up and down, still can control sandblast mechanism simultaneously and carry out angle modulation in sculpture top, carries out sand blasting from the angle of difference to the sculpture.
Furthermore, because the bottom of the cavity is obliquely arranged, sand grains in the sand blasting process can be accumulated to the oblique side, and a sand blasting recovery pipe 3 is arranged on the oblique side and used for recovering and secondarily utilizing the sand grains, so that the waste is reduced.
Further, be provided with activity articulated chamber door 10 on the 2 lateral walls of box 10 the laminating of 10 edges of chamber door has the round sealing washer, at the in-process of sculpture sand blasting, opens chamber door 10 and will carve and place on carousel 4, and the in-process of sand blasting is handled, and chamber door 10 is closed, seals through the sealing washer, and the sand grain of reduction inside leaks to the outside and causes dust pollution.
Furthermore, the sand blasting recovery pipe 3 penetrates through the box body 2 and extends to one side outside the box body 2, and a dust suction pump 11 is connected to the end part of the sand blasting recovery pipe 3, which is positioned at one end outside the box body 2.
When sand grains are recovered, negative pressure is generated by the operation of the dust suction pump 11, and the sand grains accumulated at the bottom of the cavity are recovered from the sand blasting recovery pipe 3.
Further, the turntable shield comprises a protective cover 12 fixed on the bottom wall of the cavity and a mechanical seal 13 mounted on the top end of the protective cover 12, wherein the top of the mechanical seal 13 is fixed on the bottom wall of the turntable 4.
When the rotary table 4 rotates, the bottom of the rotary table is connected to the protective cover 12 through the mechanical sealing element 13, the bottom of the protective cover 12 is arranged on the bottom wall of the cavity, mechanical parts at the bottom of the rotary table 4 are sealed and shielded, and the phenomenon that sand particles in the sand blasting process enter the mechanical parts to cause equipment jamming and incapability of running is prevented.
The conveying mechanism is including installing force (forcing) pump 14 on baffle 7, force (forcing) pump 14's input is connected with into sand pipe 15 and the output is connected with out sand pipe 16, the other end of going out sand pipe 16 extends to baffle 7 below it has flexible hose 17 to go out the end connection that sand pipe 16 is located baffle 7 below, flexible hose 17 bottom is connected with the pipe 18 of buckling.
An external sand supply device is connected with a sand inlet pipe 15, sand is pressurized by a pressure pump 14, the sand blasting effect is improved, and the pressurized sand enters a bent pipe 18 from a sand outlet pipe 16 and is transmitted to a sand blasting mechanism.
The sand blasting mechanism comprises a circular shunt pipe 19, the bottom end of the bent pipe 18 is connected with the shunt pipe 19, and the bottom of the shunt pipe 19 is connected with a plurality of spray heads 20;
in addition to the above, the bending pipe 18 transports sand into the annular shunt pipe 19, and the sand is sequentially ejected from the plurality of nozzles 20 to perform sand blasting on the sculpture.
Furthermore, each spray head 20 is also provided with a valve for controlling the sand blasting operation, so that the single spray head 20 can be independently controlled to realize the precise control of sand blasting.
The inside of the shunt tube 19 is connected with an adjusting rod 8 penetrating through the center point of the shunt tube 19, and the adjusting rod 8 is used for matching with a driving piece to adjust the lifting and the angle of the sand blasting mechanism.
The driving part comprises a first push rod 21 and a second push rod 22 which are installed on the partition board 7, the first push rod 21 and the second push rod 22 are symmetrically arranged at the midpoint of the adjusting rod 8, and output shafts of the first push rod 21 and the second push rod 22 penetrate through the partition board 7 downwards and extend to one side of the adjusting rod 8.
Articulated shaft 5 is installed and is connected on adjusting pole 8 through articulated shaft 5 to first push rod 21 output shaft bottom install the connecting plate 9 of seting up spout 6 on the outer wall of adjusting pole 8 far away from articulated shaft 5 one side, be fixed with the gag lever post 23 to the inside extension of spout 6 on the second push rod 22 output shaft bottom outer wall, gag lever post 23 diameter is the same with 6 internal diameters of spout.
On the basis, the fixed working mode of the driving piece is as follows:
when the sand blasting mechanism needs to be lifted, the first push rod 21 and the second push rod 22 are controlled simultaneously to be lifted synchronously, the adjusting rod 8 is driven to lift horizontally, the adjusting rod 8 drives the shunt tube 19 to lift, the spray head 20 on the shunt tube 19 can lift, and the flexible hose 17 can stretch in a self-adaptive mode in the process.
When the sand blasting mechanism needs to be inclined at an angle, the first push rod 21 or the second push rod 22 can be independently controlled to lift, when the first push rod 21 lifts, one side of the adjusting rod 8 is pulled to lift through the hinged shaft 5, and the other side of the adjusting rod 8 cannot lift, so that the adjusting rod 8 is inclined, the shunt pipe 19 is also inclined, and the plurality of spray heads 20 are inclined;
when the second push rod 22 goes up and down, the limiting rod 23 at the bottom end thereof can slide left and right in the sliding groove 6 on the connecting plate 9, and simultaneously can drive the connecting plate 9 to go up and down, so that the adjusting rod 8 and the shunt tube 19 go up and down, and the adjustment of the plurality of spray heads 20 is realized.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A sand blasting device for manufacturing sculptures comprises a workbench, a box body with a cavity inside is arranged at the top of the workbench, it is characterized in that the bottom of the cavity is obliquely arranged, the bottom of the oblique side of the cavity is provided with a sand blasting recovery pipe, a rotary disc is arranged in the middle of the cavity, a rotary disc protection piece used for shielding sand grains is arranged at the bottom of the rotary disc, a lifting sand blasting mechanism is arranged above the rotary table, a clapboard arranged on the inner wall of the cavity is arranged above the sand blasting mechanism, a distance is reserved between the clapboard and the top of the cavity, a driving piece for driving the sand blasting mechanism to lift and a transmission mechanism connected with the sand blasting mechanism are arranged on the clapboard, the driving piece is also used for adjusting the sand blasting angle of the sand blasting mechanism, and the transmission mechanism is used for transmitting sand grains to the sand blasting mechanism.
2. The blasting apparatus for sculpture manufacture according to claim 1, wherein: the box body is characterized in that a box door is movably hinged to the side wall of the box body, and a circle of sealing ring is attached to the edge of the box door.
3. The blasting apparatus for sculpture manufacture according to claim 1, wherein: the sand blasting recovery pipe runs through the box and extends to one side outside the box the end connection that the sand blasting recovery pipe is located the outside one end of box has the dust absorption pump.
4. The blasting apparatus for sculpture manufacture according to claim 1, wherein: the turntable shield comprises a protective cover fixed on the bottom wall of the cavity and a mechanical sealing piece arranged at the top end of the protective cover, and the top of the mechanical sealing piece is fixed on the bottom wall of the turntable.
5. The blasting apparatus for sculpture manufacture according to claim 1, wherein: the conveying mechanism comprises a pressure pump installed on a partition plate, the input end of the pressure pump is connected with a sand inlet pipe, the output end of the pressure pump is connected with a sand outlet pipe, the other end of the sand outlet pipe extends to the lower portion of the partition plate, the end portion, located below the partition plate, of the sand outlet pipe is connected with a flexible hose, and the bottom end of the flexible hose is connected with a bending pipe.
6. The blasting apparatus for sculpture manufacture according to claim 5, wherein: the sand blasting mechanism comprises a circular ring-shaped shunt pipe, the bottom end of the bent pipe is connected with the shunt pipe, a plurality of spray heads are connected to the bottom of the shunt pipe, and an adjusting rod penetrating through the center point of the shunt pipe is connected to the inner side of the shunt pipe.
7. The blasting apparatus for sculpture manufacture according to claim 6, wherein: the driving piece comprises a first push rod and a second push rod which are installed on the partition board, the first push rod and the second push rod are symmetrically arranged at the middle point of the adjusting rod, and output shafts of the first push rod and the second push rod penetrate through the partition board downwards and extend to one side of the adjusting rod.
8. The blasting apparatus for sculpture manufacture according to claim 6, wherein: the hinge shaft is installed to first push rod output shaft bottom and is connected on adjusting the pole through the hinge shaft adjust the pole and keep away from and install the connecting plate of seting up the spout on the outer wall of hinge shaft one side, be fixed with the gag lever post that extends to the spout is inside on the outer wall of second push rod output shaft bottom, the gag lever post diameter is the same with the spout internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612623.0A CN114043387A (en) | 2021-12-27 | 2021-12-27 | Sand blasting equipment for manufacturing sculpture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612623.0A CN114043387A (en) | 2021-12-27 | 2021-12-27 | Sand blasting equipment for manufacturing sculpture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114043387A true CN114043387A (en) | 2022-02-15 |
Family
ID=80213516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111612623.0A Pending CN114043387A (en) | 2021-12-27 | 2021-12-27 | Sand blasting equipment for manufacturing sculpture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114043387A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116810650A (en) * | 2023-08-30 | 2023-09-29 | 山东豪迈数控机床有限公司 | Workpiece surface treatment device and workpiece treatment system |
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| CN208854449U (en) * | 2018-08-27 | 2019-05-14 | 江苏自强涂装机械有限公司 | A kind of farm machinery parts sand blasting unit |
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| CN209850703U (en) * | 2018-12-11 | 2019-12-27 | 叶春梅 | Novel sand blasting machine |
| CN111531473A (en) * | 2020-06-15 | 2020-08-14 | 秦春红 | Auto-parts handles and uses sand blasting unit |
| CN212385289U (en) * | 2020-06-04 | 2021-01-22 | 天津市琪达精工机械配件有限公司 | Sand blasting mechanism is used in auto-parts processing |
| CN112643557A (en) * | 2020-12-21 | 2021-04-13 | 铜陵青铜时代雕塑有限公司 | Efficient sand blasting unit for copper carving production and processing |
| CN213946099U (en) * | 2020-11-17 | 2021-08-13 | 沂南县志鹏汽车配件有限公司 | Sand blasting machine is used in vehicle accessories processing |
| CN113524047A (en) * | 2020-04-14 | 2021-10-22 | 江苏华尔石英材料股份有限公司 | Sand blasting device for quartz crucible surface treatment |
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2021
- 2021-12-27 CN CN202111612623.0A patent/CN114043387A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107318814A (en) * | 2017-07-28 | 2017-11-07 | 缪智航 | A kind of a wide range of pestsides synthesis flusher |
| CN208854449U (en) * | 2018-08-27 | 2019-05-14 | 江苏自强涂装机械有限公司 | A kind of farm machinery parts sand blasting unit |
| CN209850703U (en) * | 2018-12-11 | 2019-12-27 | 叶春梅 | Novel sand blasting machine |
| CN208992490U (en) * | 2019-03-13 | 2019-06-18 | 江苏天能海洋重工有限公司 | A kind of abrasive blast equipment of adjustable sandblasting angle |
| CN113524047A (en) * | 2020-04-14 | 2021-10-22 | 江苏华尔石英材料股份有限公司 | Sand blasting device for quartz crucible surface treatment |
| CN212385289U (en) * | 2020-06-04 | 2021-01-22 | 天津市琪达精工机械配件有限公司 | Sand blasting mechanism is used in auto-parts processing |
| CN111531473A (en) * | 2020-06-15 | 2020-08-14 | 秦春红 | Auto-parts handles and uses sand blasting unit |
| CN213946099U (en) * | 2020-11-17 | 2021-08-13 | 沂南县志鹏汽车配件有限公司 | Sand blasting machine is used in vehicle accessories processing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116810650A (en) * | 2023-08-30 | 2023-09-29 | 山东豪迈数控机床有限公司 | Workpiece surface treatment device and workpiece treatment system |
| CN116810650B (en) * | 2023-08-30 | 2023-11-17 | 山东豪迈数控机床有限公司 | Workpiece surface treatment device and workpiece treatment system |
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Application publication date: 20220215 |
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| RJ01 | Rejection of invention patent application after publication |