CN111014893A - Outdoor continuous wire feeding device and method for forming atmosphere - Google Patents
Outdoor continuous wire feeding device and method for forming atmosphere Download PDFInfo
- Publication number
- CN111014893A CN111014893A CN201911283110.2A CN201911283110A CN111014893A CN 111014893 A CN111014893 A CN 111014893A CN 201911283110 A CN201911283110 A CN 201911283110A CN 111014893 A CN111014893 A CN 111014893A
- Authority
- CN
- China
- Prior art keywords
- atmosphere
- forming
- wire
- forming atmosphere
- chamber
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides an outdoor continuous wire feeding device for forming atmosphere, which comprises: forming atmosphere room and thread feeding mechanism still include atmosphere transition room, atmosphere transition room sets up on the lateral wall of forming atmosphere room, thread feeding mechanism sets up the one side of keeping away from forming atmosphere room in atmosphere transition room, and passes through atmosphere transition room to forming atmosphere room send a silk. The invention also provides an outdoor continuous wire feeding method under the forming atmosphere, which is used for additive manufacturing of parts such as large titanium alloy, stainless steel and the like. According to the forming atmosphere outdoor continuous wire feeding device and the forming atmosphere outdoor continuous wire feeding method, the forming atmosphere chamber does not need to be opened when a new wire is replaced in the forming process, wire splicing operation is completed outside the forming atmosphere chamber, the situation that air in the forming atmosphere chamber needs to be replaced again after the forming atmosphere chamber is opened is avoided, the forming efficiency of parts such as large titanium alloy and stainless steel can be greatly improved, and the production period, inert gas consumption and cracking risk of electric arc additive manufacturing of large metal parts are greatly reduced.
Description
Technical Field
The invention belongs to the technical field of additive manufacturing, and particularly relates to an outdoor continuous wire feeding device and method for a forming atmosphere.
Background
The arc fuse additive manufacturing method has the advantages of high deposition efficiency, high utilization rate of raw materials and low production cost, and can be used for producing large-scale complex metal components. The arc fuse wire additive manufacturing of titanium alloy and stainless steel components is carried out in an inert forming atmosphere chamber, and a wire feeding disc is generally arranged in the forming atmosphere chamber in the prior art. Because the weight of a single disc of wire materials sold in the market is limited, the production process needs to be interrupted for many times and new wires need to be replaced when large parts are produced. Therefore, for an arc additive manufacturing apparatus that feeds wire inside a forming atmosphere chamber, the forming atmosphere chamber needs to be opened many times. After the forming atmosphere chamber is opened every time, the gas needs to be inflated and washed again, so that a large amount of inert gas is wasted, and meanwhile, the forming period is increased. On the other hand, after the forming is interrupted, the residual stress of the part which is not formed increases continuously in the process of temperature reduction, and the risk of cracking caused by overlarge residual stress exists.
Disclosure of Invention
In order to solve at least one of the technical problems, the invention adopts the technical scheme that the forming atmosphere outdoor continuous wire feeding device and the forming atmosphere outdoor continuous wire feeding method are provided, when the forming atmosphere outdoor continuous wire feeding device and the forming atmosphere outdoor continuous wire feeding method are used for forming large-sized titanium alloy, stainless steel and other parts, a forming atmosphere chamber does not need to be opened when a new wire is replaced in the forming process, wire connection operation is completed outside the forming atmosphere chamber, and the production cycle, inert gas consumption and cracking risk of electric arc additive manufacturing of large-sized metal parts can be greatly reduced.
In order to at least achieve one of the above purposes, the invention adopts the technical scheme that:
the invention provides an outdoor continuous wire feeding device for forming atmosphere, which comprises: forming atmosphere room and thread feeding mechanism still include atmosphere transition room, atmosphere transition room sets up on the lateral wall of forming atmosphere room, thread feeding mechanism sets up the one side of keeping away from forming atmosphere room in atmosphere transition room, and passes through atmosphere transition room to forming atmosphere room send a silk.
Further, the atmosphere transition chamber comprises a connecting pipe, an air inlet, an air outlet and a wire inlet, wherein the connecting pipe is arranged between the forming atmosphere chamber and the atmosphere transition chamber.
Further, the atmosphere transition chamber can be continuously filled with inert gas through the gas inlet to form a micro-positive pressure environment.
Further, the wire feeding mechanism comprises a wire material and a wire feeding disc, the wire material is wound on the wire feeding disc, the wire material enters the atmosphere transition chamber through the wire inlet, and enters the forming atmosphere chamber through the connecting pipe
Further, the device also comprises a wire connecting structure outside the forming atmosphere chamber, wherein the wire connecting structure outside the forming atmosphere chamber comprises a resistance butt welding machine and a sharpening machine.
The invention also provides a wire feeding method of the outdoor continuous wire feeding device according to the forming atmosphere, which comprises the following steps:
and 5, repeating the step 3 and the step 4 until the additive manufacturing is completed.
Further, the inert gas is argon.
Further, in the step 4, before the wire is used up, the residual wire is connected with a new wire of a new wire feeding disc in situ.
Further, the in-situ connection is that the ends of the residual wire and the new wire are cut, polished and leveled, the new wire and the residual wire are welded together by a resistance butt welding machine, and then a joint is polished and leveled smoothly by a polishing machine.
Further, the oxygen content in the forming atmosphere chamber was set to 200 ppm.
Compared with the prior art, the outdoor continuous wire feeding device and the method thereof for forming atmosphere provided by the invention have the beneficial effects that:
(1) when the technical scheme of the invention is adopted to mold large-scale titanium alloy, stainless steel and other parts, the molding efficiency is greatly improved. When the wire materials are used up in the forming process, the forming atmosphere chamber does not need to be opened, the replacement and the connection of the wire materials can be completed outside the forming atmosphere chamber, and the situation that the air in the forming atmosphere chamber needs to be replaced by inert gas for a long time after the forming atmosphere chamber is opened is avoided.
(2) By adopting the technical scheme of the invention, the consumption of inert gas is greatly reduced when large-scale titanium alloy, stainless steel and other parts are molded. When the wire is used up in the forming process, the forming atmosphere chamber does not need to be opened, the replacement and the connection of the wire can be completed outside the forming atmosphere chamber, and the situation that a large amount of inert gas is consumed to replace the air in the forming atmosphere chamber after the forming atmosphere chamber is opened is avoided.
(3) When the scheme of the invention is adopted to mold large-scale titanium alloy, stainless steel and other parts, the residual stress in the molding process can be reduced, and the risk of cracking of the parts is reduced. When the wire materials are used up in the forming process, the time for replacing new wires and connecting wires is short, the temperature of large metal parts which are not formed is reduced a little, and the risk of cracking caused by the fact that the forming is interrupted for a long time and the residual stress is greatly increased is avoided.
In a word, the invention provides the forming atmosphere outdoor continuous wire feeding device and the method thereof, which have the advantages of high forming efficiency, low cracking risk, low consumption of inert gas, low production cost and strong practicability, and have wide application prospects.
Drawings
FIG. 1 is a schematic view of an outdoor wire feeding structure of a forming atmosphere according to the present invention;
FIG. 2 is a schematic view of the structure of the external filament of the forming atmosphere chamber of the present invention.
Wherein the reference numerals are as follows:
1-forming atmosphere chamber, 2-atmosphere transition chamber, 3-connecting pipe, 4-air inlet, 5-wire inlet, 6-air outlet, 7-wire, 8-wire feeding disc, 9-resistance butt welding machine, 10-residual wire, 11-new wire, 12-grinding machine and 13-wire feeding mechanism.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. Note that the following described embodiments are illustrative only for explaining the present invention, and are not to be construed as limiting the present invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following will describe the forming atmosphere outdoor continuous wire feeding device and the method thereof provided by the invention in detail by specific embodiments:
as shown in fig. 1-2, the outdoor continuous wire feeding device for forming atmosphere according to the present invention comprises: the device comprises a forming atmosphere chamber 1, an atmosphere transition chamber 2 and a wire feeding mechanism 13, wherein the atmosphere transition chamber 2 is arranged on the outer side wall of the forming atmosphere chamber 1, and the wire feeding mechanism 13 is arranged on one side of the atmosphere transition chamber 2, which is far away from the forming atmosphere chamber 1, and feeds wires to the forming atmosphere chamber 1 through the atmosphere transition chamber 2;
the atmosphere transition chamber 2 is provided with a connecting pipe 3, an air inlet 4, an air outlet 6 and a wire inlet 5, the connecting pipe 3 is arranged between the forming atmosphere chamber 1 and the atmosphere transition chamber 2, a wire 7 of a wire feeding mechanism 13 is wound on a wire feeding disc 8, enters the atmosphere transition chamber 2 through the wire inlet 5 and is fed into the forming atmosphere chamber 1 through the connecting pipe 3;
the invention also provides an external wire connecting structure of the forming atmosphere chamber, which is used for connecting the residual wire 10 with the new wire 11 on the new wire feeding disc 8 in situ. The external wire connecting structure of the forming atmosphere chamber comprises a resistance butt welding machine 9 and a sharpening machine 12. And cutting, polishing and flattening the ends of the residual wire material 10 and the new wire material 11 by a sharpening machine 12 before connection, welding the new wire material 11 and the residual wire material 10 together by a resistance butt welding machine 9, and then sharpening and smoothing the joint by the sharpening machine 12.
The invention relates to an outdoor continuous wire feeding and additive manufacturing method adopting a forming atmosphere, which comprises the following steps of:
and 5, repeating the step 3 and the step 4 until the additive manufacturing is completed.
Specifically, compared with the arc additive manufacturing method for wire feeding in the forming atmosphere chamber, the arc additive manufacturing method for continuously wire feeding in the forming atmosphere chamber provided by the invention comprises the following steps:
example 1
To is directed at
Titanium alloy hemisphere with wall thickness of 8mm, required
The dosage of the titanium alloy wires is 55 kg. The wire is formed by adopting an electric arc additive manufacturing method, the wire feeding speed is 3m/min, and the deposition efficiency is 0.9 kg/h. A standard wire disc of 10kg is adopted, 6 discs are needed in total, and the wire needs to be replaced for 5 times. Each wire change took 0.5 h. When the oxygen content in the forming atmosphere chamber reaches 200ppm, 1 tank of liquid argon is needed for replacement and cleaning for 10 hours.
For wire feeding in the forming atmosphere chamber, the forming atmosphere chamber needs to be cleaned for 6 times, and the assembly time is at least:
10 hx 6 (argon displacement time) +0.5 hx 6+55 kg/0.9 kg/h 124 h;
neglecting the argon consumption for molding, the amount of argon consumed was at least 6 cans.
For the outdoor wire feeding of the forming atmosphere, the forming atmosphere chamber needs to be cleaned for 1 time, and the assembly time is as follows:
10h+0.5h×6+55kg÷0.9kg/h＝74h；
neglecting the argon consumption for molding, the amount of argon consumed was at least 1 can.
Therefore, the forming atmosphere is used for outdoor wire feeding, the production period is shortened by 40 percent, and the consumption of liquid argon is reduced by 83 percent. And the time interval between every two wire replacement is reduced from 10.5h to 0.5h, and the cracking risk in the forming process of the large titanium alloy is obviously reduced.
Example 2
To is directed at
A stainless steel body part with a height of 500mm and a wall thickness of 8mm, as required
The amount of stainless steel wire used was 100 kg. The wire is formed by adopting an electric arc additive manufacturing method, the wire feeding speed is 9m/min, and the deposition efficiency is 4.8 kg/h. A standard wire disc of 20kg is adopted, 5 discs are needed in total, and the wire needs to be replaced 4 times. Each wire change took 0.5 h. When the oxygen content in the forming atmosphere chamber reaches 200ppm, 1 tank of liquid argon is needed for replacement and cleaning for 10 hours.
And for wire feeding in the forming atmosphere chamber, the forming atmosphere chamber needs to be cleaned for 5 times, and the assembly time is at least:
10h × 5 (argon replacement time) +0.5h × 5+100kg ÷ 4.8kg/h ═ 73 h;
neglecting the argon consumption for molding, the amount of argon consumed was at least 5 cans.
For the outdoor wire feeding of the forming atmosphere, the forming atmosphere chamber needs to be cleaned for 1 time, and the assembly time is as follows:
10h+0.5h×5+100kg÷4.8kg/h＝33h；
neglecting the argon consumption for molding, the amount of argon consumed was at least 1 can.
Therefore, the wire is fed outdoors in the forming atmosphere, the production period is shortened by 55 percent, and the consumption of liquid argon is reduced by 80 percent.
By adopting the forming atmosphere outdoor continuous wire feeding device and the method thereof provided by the invention, when large-scale titanium alloy, stainless steel and other parts are formed, the forming atmosphere chamber does not need to be opened when a new wire is replaced in the forming process, the wire splicing operation is completed outside the forming atmosphere chamber, the phenomenon that the air in the forming atmosphere chamber needs to be replaced again after the forming atmosphere chamber is opened is avoided, the forming efficiency of the large-scale titanium alloy, stainless steel and other parts can be greatly improved, and the production period, the inert gas consumption and the cracking risk of the large-scale metal component electric arc additive manufacturing are greatly reduced.
In a word, the invention provides the forming atmosphere outdoor continuous wire feeding device and the method thereof, which have the advantages of high forming efficiency, low cracking risk, low consumption of inert gas, low production cost and strong practicability, and have wide application prospects.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Claims (10)
1. An outdoor continuous wire feeder for forming atmosphere, comprising: forming atmosphere room and thread feeding mechanism, its characterized in that still includes atmosphere transition room, atmosphere transition room sets up on the lateral wall of forming atmosphere room, thread feeding mechanism sets up the one side of keeping away from forming atmosphere room in atmosphere transition room, and passes through atmosphere transition room to forming atmosphere room send a silk.
2. The forming atmosphere outdoor continuous wire feeder according to claim 1, wherein the atmosphere transition chamber comprises a connecting pipe, a gas inlet, a gas outlet and a wire inlet, and the connecting pipe is arranged between the forming atmosphere chamber and the atmosphere transition chamber.
3. The forming atmosphere outdoor continuous wire feeder of claim 2, wherein the atmosphere transition chamber is configured to be continuously filled with inert gas through the gas inlet to form a micro-positive pressure environment.
4. The forming atmosphere outdoor continuous wire feeder of claim 3, wherein the wire feeder comprises a wire and a wire feeding disc, the wire is wound on the wire feeding disc, the wire enters the atmosphere transition chamber through the wire inlet and enters the forming atmosphere chamber through the connecting pipe.
5. The outdoor continuous wire feeder according to claim 4, further comprising an external wire connecting structure of the forming atmosphere chamber, wherein the external wire connecting structure of the forming atmosphere chamber comprises a resistance butt welding machine and a sharpening machine.
6. A method of forming an atmospheric outdoor continuous wire feeder according to any one of claims 1-5, comprising the steps of:
step 1, filling inert gas into a forming atmosphere chamber;
step 2, continuously filling inert gas into the atmosphere transition chamber to form a micro-positive pressure environment;
step 3, the wire feeding mechanism conveys wires to the forming atmosphere chamber through the atmosphere transition chamber;
step 4, replacing the wire material before the wire material in the wire feeding mechanism is used up;
and 5, repeating the step 3 and the step 4 until the additive manufacturing is completed.
7. The method of claim 6, wherein the inert gas is argon.
8. A method according to claim 7, wherein in step 4, the remaining filament is connected in situ with a new filament from a new feed reel before the filament is exhausted.
9. The method of claim 8, wherein the in-situ joining is shear grinding and flattening the ends of the remaining and new wires, welding the new and remaining wires together with a resistance butt welder, and then grinding and flattening the joints with a grinder.
10. The method of claim 9, wherein the forming atmosphere chamber oxygen content is set at 200 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283110.2A CN111014893A (en) | 2019-12-13 | 2019-12-13 | Outdoor continuous wire feeding device and method for forming atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283110.2A CN111014893A (en) | 2019-12-13 | 2019-12-13 | Outdoor continuous wire feeding device and method for forming atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111014893A true CN111014893A (en) | 2020-04-17 |
Family
ID=70208557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911283110.2A Pending CN111014893A (en) | 2019-12-13 | 2019-12-13 | Outdoor continuous wire feeding device and method for forming atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111014893A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001068308A1 (en) * | 2000-03-17 | 2001-09-20 | Bernard Toquet | Device for electric welding under gaseous atmosphere |
| CN204148711U (en) * | 2014-10-13 | 2015-02-11 | 庆云昊天焊材科技有限公司 | Novel welding wire butt welding machine |
| CN106735751A (en) * | 2016-12-30 | 2017-05-31 | 青岛卓思三维智造技术有限公司 | The automatic complement wire system and method in two cabins |
| CN109551145A (en) * | 2019-01-31 | 2019-04-02 | 西安增材制造国家研究院有限公司 | A kind of automatic wire feeding device and its application method for increasing material manufacturing |
| CN209532480U (en) * | 2019-01-31 | 2019-10-25 | 西安增材制造国家研究院有限公司 | A kind of automatic wire feeding device for increasing material manufacturing |
-
2019
- 2019-12-13 CN CN201911283110.2A patent/CN111014893A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001068308A1 (en) * | 2000-03-17 | 2001-09-20 | Bernard Toquet | Device for electric welding under gaseous atmosphere |
| CN204148711U (en) * | 2014-10-13 | 2015-02-11 | 庆云昊天焊材科技有限公司 | Novel welding wire butt welding machine |
| CN106735751A (en) * | 2016-12-30 | 2017-05-31 | 青岛卓思三维智造技术有限公司 | The automatic complement wire system and method in two cabins |
| CN109551145A (en) * | 2019-01-31 | 2019-04-02 | 西安增材制造国家研究院有限公司 | A kind of automatic wire feeding device and its application method for increasing material manufacturing |
| CN209532480U (en) * | 2019-01-31 | 2019-10-25 | 西安增材制造国家研究院有限公司 | A kind of automatic wire feeding device for increasing material manufacturing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1314532C (en) | Method and device for producing body ply material for pneumatic tires | |
| CN104245208B (en) | System and method for flux cored wire | |
| CN106735227B (en) | Hot isostatic pressing preparation method of threaded element of double-screw extruder | |
| CN104908166A (en) | Annular superhard abrasive wire and manufacturing method thereof | |
| CN101574852B (en) | Production equipment of steel-plastic reinforced composite pipe | |
| CN102751507A (en) | Manufacturing method of grid of lead-acid storage battery | |
| CN111014893A (en) | Outdoor continuous wire feeding device and method for forming atmosphere | |
| CN102303182A (en) | High-frequency electric heating welding device | |
| CN204036701U (en) | The air-cooled hopper of a kind of PBT particle adverse current | |
| CN205602855U (en) | Pipe connector assembly wind device steps down | |
| CN213590447U (en) | Heating device for be used for new material processing | |
| CN104853463A (en) | Automatic high-speed continuous production method for metal electrothermal tubes | |
| CN210172762U (en) | Welding gun sleeve | |
| CN208980783U (en) | A kind of thick lithium impurity removing equipment of lithium metal | |
| CN207827866U (en) | A kind of feeding equipment for graphite expansion equipment | |
| CN2892311Y (en) | Aluminium pipe forming welding platoform | |
| CN206614167U (en) | Apparatus for shaping in a kind of welded still pipe weld seam | |
| CN218637775U (en) | Glue spraying and gluing nozzle for special-shaped tail end | |
| CN217675048U (en) | Anti-blocking blade shaft of screw conveyor | |
| CN217346600U (en) | Feeding device of plastic extruding machine | |
| CN205415948U (en) | Vertical press of extra quality bucket | |
| CN210692207U (en) | Combined type wire and cable stranding die | |
| CN204201054U (en) | A kind of novel dished (torispherical) head | |
| CN210880819U (en) | Filtering system for preparing mould pressing foaming ethylene propylene diene monomer composition material | |
| CN210419190U (en) | Novel filling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |