CN114260474B - Forming cylinder taking-out device and forming cylinder taking-out type 3D metal printing equipment - Google Patents
Forming cylinder taking-out device and forming cylinder taking-out type 3D metal printing equipment Download PDFInfo
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- CN114260474B CN114260474B CN202111598899.8A CN202111598899A CN114260474B CN 114260474 B CN114260474 B CN 114260474B CN 202111598899 A CN202111598899 A CN 202111598899A CN 114260474 B CN114260474 B CN 114260474B
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- 238000007639 printing Methods 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000007648 laser printing Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 230000003116 impacting effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 238000010923 batch production Methods 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Powder Metallurgy (AREA)
Abstract
The invention relates to a forming cylinder taking-out device and a forming cylinder taking-out type 3D metal printing device, wherein the forming cylinder taking-out device comprises a cylinder moving module, a linear guide rail, a cylinder driving module, a cylinder positioning module and a cylinder clamping module, wherein the cylinder moving module is positioned above the linear guide rail and connected with a slide block of the linear guide rail; the cylinder driving module is connected with the cylinder moving module and used for driving the cylinder moving module to move between a cylinder printing station and a cylinder pick-up station along the linear guide rail; the cylinder positioning module is arranged on the cylinder moving module and used for positioning the formed cylinder; the cylinder clamping modules are positioned at two sides of the cylinder printing station and used for clamping and fixing the forming cylinder. The invention does not need human intervention in the middle process of installing and taking out the forming cylinder, has high automation degree, can realize batch production, reduces personnel participation, reduces the harm of powder to people, saves labor cost and improves the working efficiency.
Description
Technical Field
The invention belongs to the technical field of selective melting equipment, and particularly relates to a forming cylinder taking-out device and a forming cylinder taking-out type 3D metal printing equipment.
Background
Because the printing depth of the 3D metal printing equipment is higher than the height space inside the forming chamber, and meanwhile, the forming part of the large equipment is too heavy and the taking part in the forming chamber can cause the pollution problem of the optical lens, the forming cylinder is required to be transferred or the forming chamber is required to be moved when the part is taken out, so that the taking work of the forming part is realized. The existing cylinder body taking-out and returning mechanism adopts the cylinder body to move in place, then the cylinder body is lifted and suspended through the lifting module, and the cylinder body reaches the top positioning module to realize the positioning of the cylinder body. The lifting structure is complex, the lifting is required to be ensured to be in the same plane, the positioning requirement is high, the cylinder taking logic is complex, the steps are more, and the automatic installation is easy to break due to faults.
In addition, the existing piece taking and printing integrated equipment cannot be subjected to powder cleaning when printing exists, printing operation cannot be performed when powder is cleaned, equipment efficiency is low, failure rate is increased along with the equipment integration, efficiency is low and equipment cannot continuously work during batch production, and labor cost is increased along with the equipment integration. Therefore, a device with high automation degree and less human intervention, which can be adapted to an automated production line, is needed to solve the above problems.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a forming cylinder taking-out device and a forming cylinder taking-out type 3D metal printing device, which only need to manually install a forming cylinder body on a cylinder body positioning module, and all other actions are automatic processes without human intervention, so that printing operation can be started; when the forming cylinder body is required to be taken out, the reverse operation flow can be carried out by the action, manual intervention is not needed during the reverse operation flow, the forming cylinder body can automatically move to the cylinder body taking-out position, the labor cost is saved, and the working efficiency is improved.
The invention is realized in such a way that a forming cylinder taking-out device comprises a cylinder body moving module, a linear guide rail, a cylinder body driving module, a cylinder body positioning module and a cylinder body clamping module, wherein the cylinder body moving module is positioned above the linear guide rail and is connected with a sliding block of the linear guide rail; the cylinder driving module is connected with the cylinder moving module and used for driving the cylinder moving module to move between a cylinder printing station and a cylinder pick-up station along the linear guide rail; the cylinder positioning module is arranged on the cylinder moving module and used for positioning the formed cylinder; the cylinder clamping modules are located on two sides of the cylinder printing station and used for clamping and fixing the forming cylinder.
In the above technical scheme, preferably, the device further comprises a cylinder body limiting module, wherein the cylinder body limiting module is positioned at two ends of the linear guide rail and used for limiting the stroke of the cylinder body moving module.
In the above technical scheme, it is further preferable that the cylinder body limiting module comprises a limiting plate, a buffer mounted on the limiting plate and a dead limit, and when the cylinder body moving module moves to the cylinder body limiting module, the buffer is impacted first and then the dead limit is impacted.
In the above technical solution, preferably, the cylinder driving module is located at one side of the cylinder moving module and is connected with the cylinder moving module in a clamping manner.
In the above technical scheme, it is further preferable that a clamping block is mounted on the sliding block of the cylinder driving module, a clamping piece is mounted on one side of the cylinder moving module, and the clamping piece is clamped on the clamping block.
In the above technical solution, preferably, the cylinder driving module is a rodless cylinder.
In the above technical solution, preferably, the cylinder positioning module is a positioning pin, and the positioning pin is matched with a positioning pin hole at the bottom of the formed cylinder.
In the above technical scheme, preferably, the cylinder body clamping module comprises a telescopic cylinder, a clamping block I and a clamping block II, a telescopic rod of the telescopic cylinder is connected with the clamping block II, the clamping block II is arranged at the bottom of the formed cylinder body, and the clamping block I is in tight fit with the clamping block II.
In the above technical solution, it is further preferable that the mating surfaces of the first clamping block and the second clamping block are inclined surfaces, so that the second clamping block is subjected to inward and downward forces to clamp and fix the forming cylinder body when the first clamping block is pressed against the second clamping block.
The utility model provides a take-out 3D metal printing equipment of shaping jar, includes laser printing module, supplies powder module, wind field module, shop's powder module, takes shape cabin, spills powder recovery module, shaping cylinder body, Z axle and promotes module and bottom frame, still includes above-mentioned take-out device of shaping jar, take-out device of shaping jar is installed on the bottom frame.
The formed cylinder body is arranged on the cylinder body moving module through a special forklift or automatic line hoisting equipment or a crown block and is matched and positioned with the cylinder body positioning module; the cylinder driving module moves the forming cylinder to the square of the Z-axis lifting module; the cylinder clamping module is used for fixedly clamping the forming cylinder, and the forming cylinder is in sealing connection with the forming cabin and the Z-axis lifting module through the pneumatic sealing ring, so that the mounting work of the forming cylinder is realized; and then, the Z-axis lifting module starts to rise to a piston connecting position, and the Z-axis lifting module is connected with the piston through the zero chuck mechanism to realize the up-and-down movement of the piston, so that the printing operation can be started. When the forming cylinder is required to be taken out, the forming cylinder can automatically move to the cylinder taking-out position by performing a reverse operation flow.
The invention has the advantages and positive effects that:
1. According to the forming cylinder taking-out device, the forming cylinder body is only required to be manually installed on the cylinder body positioning module, all other actions are automatic processes, and the printing operation can be started without human intervention; when the forming cylinder body is required to be taken out, the forming cylinder body can be automatically moved to the cylinder body taking-out position without human intervention during a reverse operation flow of the forming cylinder body; the labor cost is saved, and the operation efficiency is improved.
2. After the forming cylinder body is taken out, powder cleaning can be performed in a special powder taking and cleaning system, and meanwhile, the forming cylinder body has interchangeability and is particularly suitable for batch production; the forming cylinder body and the host exist in a many-to-one mode, the downtime of the printer is greatly reduced, the utilization rate of equipment is improved, the production efficiency is improved, meanwhile, the equipment can be adapted to an automatic production line, a plurality of hosts are matched with the same production line, the cylinder body can be automatically taken out and put back, and powder cleaning and other works can be automatically carried out from the automatic transportation station to the pick-up station.
3. The invention does not need human intervention in the middle process of installing and taking out the forming cylinder, reduces the risk, and avoids the problems of great difficulty, more steps, easy misoperation and even possible mechanical injury of the manual cylinder taking operation; and the automatic degree is high, and the automatic production line or VGA trolley can be adapted, so that batch production is realized, personnel participation is reduced, and the harm of powder to people is reduced. The equipment fully liberates productivity, saves labor cost and improves operation efficiency.
Drawings
FIG. 1 is a schematic view of a forming cylinder extraction apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a forming cylinder provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a forming cylinder extraction type 3D metal printing apparatus according to an embodiment of the present invention;
fig. 4 is a side view of a forming cylinder take-out type 3D metal printing apparatus provided by an embodiment of the present invention.
In the figure: 100. a forming cylinder take-out device; 110. a cylinder moving module; 111. a clamping piece; 120. a linear guide rail; 130. a cylinder driving module; 131. a clamping block; 140. a cylinder positioning module; 150. a cylinder body limiting module; 151. a limiting plate; 152. a buffer; 153. dead limit; 160. a cylinder clamping module; 161. a telescopic cylinder; 162. a clamping block I; 163. a clamping block II;
200. Forming a cylinder body; 210. positioning pin holes; 220. a piston; 221. zero point blind rivet;
300. A laser printing module; 400. a powder supply module; 500. a powder spreading module; 600. a wind field module; 700. forming a cabin; 800. a powder overflow recovery module; 900. a Z-axis lifting module; 1000. and a bottom frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the examples and the accompanying drawings. It will be appreciated by those of skill in the art that the following specific examples or embodiments are provided as a series of preferred embodiments of the invention, and that the embodiments may be combined or otherwise interrelated, unless one or more specific examples or embodiments are specifically set forth herein as being not intended to be interrelated or co-usable with other examples or embodiments. Meanwhile, the following specific examples or embodiments are merely provided as an optimized arrangement, and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 and 2, the present embodiment provides a forming cylinder extracting apparatus, which includes a cylinder moving module 110, a linear guide 120, a cylinder driving module 130, a cylinder positioning module 140, a cylinder limiting module 150 and a cylinder clamping module 160.
The cylinder moving module 110 is located above the linear guide rail 120 and connected with the slide block of the linear guide rail 120; the cylinder driving module 130 is connected to the cylinder moving module 110, and is used for driving the cylinder moving module 110 to move along the linear guide rail 120 between a cylinder printing station and a cylinder pick-up station. The cylinder driving module 130 is located at one side of the cylinder moving module 110 and is connected with the cylinder moving module 110 in a clamping manner; specifically, the cylinder driving module 130 is a rodless cylinder, the sliding block of the rodless cylinder is provided with a clamping block 131, one side of the cylinder moving module 110 is provided with a clamping piece 111, the clamping piece 111 is clamped on the clamping block 131, and the sliding block can drive the cylinder moving module 110 to move along the linear guide rail 120 when moving on the cylinder barrel of the rodless cylinder.
The cylinder positioning module 140 is mounted on the cylinder moving module 110 and is used for positioning the forming cylinder 200; the cylinder positioning module 140 is a positioning pin, and the positioning pin is matched with a positioning pin hole 210 at the bottom of the forming cylinder 200.
The cylinder limiting modules 150 are located at two ends of the linear guide rail 120, and are used for limiting the stroke of the cylinder moving module 110; the cylinder body limiting module 150 comprises a limiting plate 151, a buffer 152 and a dead limit 153, wherein the buffer 152 is arranged on the limiting plate 151, and the buffer 152 is impacted firstly to buffer and absorb shock and then the dead limit 153 is impacted and fixed when the cylinder body moving module 110 moves to the cylinder body limiting module 150.
The cylinder clamping modules 160 are positioned at two sides of the cylinder printing station and are used for clamping and fixing the forming cylinder 200; the cylinder clamping module 160 comprises a telescopic cylinder 161, a clamping block I162 and a clamping block II 163, wherein a telescopic rod of the telescopic cylinder 161 is connected with the clamping block I162, the clamping block II 163 is arranged at the bottom of the forming cylinder 200, and the clamping block I162 is in tight fit with the clamping block II 163. Preferably, the mating surfaces of the first clamping block 162 and the second clamping block 163 are inclined surfaces, so that the first clamping block 162 is pressed against the second clamping block 163, and the second clamping block 163 is pressed inward and downward to clamp the forming cylinder 200.
Referring to fig. 3 and 4, a forming cylinder extraction type 3D metal printing apparatus includes a laser printing module 300, a powder supply module 400, a powder spreading module 500, a wind field module 600, a forming cabin 700, a powder overflow recovery module 800, a forming cylinder extraction device 100, a forming cylinder 200, a Z-axis lifting module 900, and a bottom frame 1000. The laser printing module 300 is arranged at the top of the forming cabin 700 in a mode of single laser, double laser, three laser and four laser; the powder supply module 400 is arranged above the forming cabin 700 and behind the laser printing module 300, and all the powder required for printing comes from the powder supply module 400; the powder spreading module 500 is arranged inside the forming cabin 700 and is mainly used for powder spreading operation in the printing process; the wind field modules 600 are uniformly distributed on two sides of the forming cabin 700, and blow away the sintered smoke dust impurities in the printing process; the forming cabin 700 is located above the bottom frame 1000 and is mounted on the bottom frame 1000, and both sides of the forming cabin are provided with powder overflow recovery modules 800 for recovering powder overflow in the printing process; the forming cylinder withdrawing device 100 is installed on the bottom frame 1000, and the forming cylinder 200 is installed on the cylinder moving module 110 of the forming cylinder withdrawing device 100 to realize the taking and cylinder loading movement of the forming cylinder 200; the Z-axis lift system is mounted on the bottom frame 1000 directly below the forming chamber 700.
The working process of the equipment is divided into six steps, and the steps are as follows: the forming cylinder 200 is installed, the forming cylinder 200 is moved to a printing station to clamp and fix, the Z-axis lifting module 900 is connected with the piston 220 and seals the forming cylinder 200, the Z-axis lifting module 900 is separated from the piston 220 and seals the forming cylinder 200 closed, the forming cylinder 200 is released and moved to a workpiece taking station, and the forming cylinder 200 is taken out.
The concrete implementation process of the forming cylinder 200 is as follows: the forming cylinder 200 is placed on the cylinder positioning module 140 through a special forklift or automatic line hoisting equipment or crown block, the forming cylinder 200 is installed and positioned through a positioning pin and a positioning pin hole 210 at the bottom of the forming cylinder 200, and when the forming cylinder 200 is installed in place, a cylinder installation sensor sends out a forming cylinder 200 installation in place signal to indicate that the forming cylinder 200 is installed completely, so that the next operation can be performed.
The forming cylinder 200 moves to the printing station to clamp and fix the concrete implementation process: the forming cylinder 200 is installed, the PLC triggers the forming cylinder 200 to move after receiving the forming cylinder 200 in-place signal, the cylinder driving module 130 moves the forming cylinder 200 to a printing station and gives out a printing station signal, at the moment, the PLC triggers a cylinder clamping instruction after receiving the printing station signal, the cylinder clamping module 160 starts clamping and fixing actions and detects feedback of the clamping and fixing actions, the completion of the clamping and fixing indicates that the forming cylinder 200 is installed, and the next operation is entered.
The Z-axis lifting module 900 is connected with the piston 220 and the sealing implementation process of the forming cylinder 200: the forming cylinder 200 is installed, the Z-axis lifting module 900 starts to rise to the connecting position of the piston 220, the Z-axis lifting module 900 is fixedly connected with the piston 220 through the zero chuck installed on the Z-axis lifting module 900 and the zero blind rivet 221 installed on the piston 220, and after the connection is completed, the inflatable sealing rings at the top and the bottom of the forming cylinder 200 are opened for inflation, so that the integral sealing connection of equipment is realized, and related operations such as printing can be opened after all the connection is completed.
After the part is printed, the take-out operation of the forming cylinder 200 is reversed from the installation process.
Feedback is provided by sensors after each step is completed during the installation and removal of the forming cylinder 200, and the next step can be performed after each step is completed.
The invention does not need human intervention in the middle process of installing and taking out the forming cylinder 200, avoids the problems of great difficulty, multiple steps, easy occurrence of misoperation, even possible mechanical injury and the like of the manual cylinder taking operation, and perfectly avoids the risks. And the automatic degree is high, and the automatic production line or VGA trolley can be adapted, so that batch production is realized, personnel participation is reduced, and the harm of powder to people is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present invention.
Claims (5)
1. A forming cylinder removal device, characterized in that: the cylinder body moving module is positioned above the linear guide rail and is connected with a sliding block of the linear guide rail; the cylinder driving module is connected with the cylinder moving module and used for driving the cylinder moving module to move between a cylinder printing station and a cylinder pick-up station along the linear guide rail; the cylinder positioning module is arranged on the cylinder moving module and used for positioning the formed cylinder; the cylinder clamping modules are positioned at two sides of the cylinder printing station and used for clamping and fixing the forming cylinder;
the cylinder driving module is positioned at one side of the cylinder moving module and is connected with the cylinder moving module in a clamping way; a clamping block is arranged on the sliding block of the cylinder body driving module, a clamping piece is arranged on one side of the cylinder body moving module, and the clamping piece is clamped on the clamping block; the cylinder body driving module is a rodless cylinder;
the cylinder body clamping module comprises a telescopic cylinder, a first clamping block and a second clamping block, wherein a telescopic rod of the telescopic cylinder is connected with the first clamping block, the second clamping block is arranged at the bottom of the formed cylinder body, and the first clamping block is in tight fit with the second clamping block in a propping manner;
the matched surfaces between the clamping block I and the clamping block II are inclined surfaces, so that the clamping block I is clamped and fixed by inward and downward force when the clamping block II is propped against the clamping block II.
2. The forming cylinder removal device of claim 1, further comprising cylinder limit modules located at both ends of the linear guide for limiting the travel of the cylinder movement module.
3. The forming cylinder removing device according to claim 2, wherein the cylinder limiting module comprises a limiting plate, a buffer mounted on the limiting plate and a dead limit, and the cylinder moving module impacts the buffer before impacting the dead limit when moving to the cylinder limiting module.
4. The forming cylinder removal apparatus of claim 1, wherein the cylinder positioning module is a dowel pin that mates with a dowel pin hole in the bottom of the forming cylinder.
5. A forming cylinder taking-out type 3D metal printing apparatus, comprising a laser printing module, a powder supply module, a wind field module, a powder spreading module, a forming cabin, a powder overflow recovery module, a forming cylinder body, a Z-axis lifting module and a bottom frame, and further comprising the forming cylinder taking-out device according to any one of claims 1 to 4, wherein the forming cylinder taking-out device is mounted on the bottom frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598899.8A CN114260474B (en) | 2021-12-24 | 2021-12-24 | Forming cylinder taking-out device and forming cylinder taking-out type 3D metal printing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598899.8A CN114260474B (en) | 2021-12-24 | 2021-12-24 | Forming cylinder taking-out device and forming cylinder taking-out type 3D metal printing equipment |
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| Publication Number | Publication Date |
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| CN114260474A CN114260474A (en) | 2022-04-01 |
| CN114260474B true CN114260474B (en) | 2024-06-14 |
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| CN202111598899.8A Active CN114260474B (en) | 2021-12-24 | 2021-12-24 | Forming cylinder taking-out device and forming cylinder taking-out type 3D metal printing equipment |
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| CN215095669U (en) * | 2021-04-21 | 2021-12-10 | 天津清研智束科技有限公司 | Forming cylinder assembly and 3D printing device |
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| CN106738907B (en) * | 2016-12-29 | 2019-08-06 | 湖南华曙高科技有限责任公司 | Three-dimension object manufacturing equipment and its moulding cylinder assembly method |
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| DE102019212679A1 (en) * | 2019-08-23 | 2021-02-25 | Realizer Gmbh | Provision module for a 3D printing machine |
| CN110394423B (en) * | 2019-08-27 | 2020-07-24 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | 3D sand mould printer based on ink-jet printing technology |
| CN211179287U (en) * | 2019-12-10 | 2020-08-04 | 杭州市建筑工程质量检测中心有限公司 | Clamp for detecting tensile compression of mechanical connection joint of reinforcing steel bar |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228796A (en) * | 2017-06-26 | 2017-10-03 | 长春机械科学研究院有限公司 | A kind of horizontal sliding wedge-shaped clamping device |
| CN211639169U (en) * | 2019-12-30 | 2020-10-09 | 大连东方专用机床有限公司 | Guide sleeve feeding device |
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| CN114260474A (en) | 2022-04-01 |
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