CN114054526A - MCR extrusion forming device for high-temperature alloy wire rod - Google Patents
MCR extrusion forming device for high-temperature alloy wire rod Download PDFInfo
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- CN114054526A CN114054526A CN202111326502.XA CN202111326502A CN114054526A CN 114054526 A CN114054526 A CN 114054526A CN 202111326502 A CN202111326502 A CN 202111326502A CN 114054526 A CN114054526 A CN 114054526A
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- extrusion
- temperature alloy
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- wire
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- 238000001125 extrusion Methods 0.000 title claims abstract description 74
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 66
- 239000000956 alloy Substances 0.000 title claims abstract description 66
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000005461 lubrication Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000012545 processing Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/08—Dies; Selection of material therefor; Cleaning thereof with section defined by rollers, balls, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention provides an MCR extrusion forming device for high-temperature alloy disc round wire materials, which belongs to the field of special alloy processing and comprises an equipment main body, and a plurality of groups of transverse extrusion modules and longitudinal extrusion modules which are arranged in the equipment main body at intervals; each transverse extrusion module comprises a pair of roller dies which are horizontally arranged and have opposite rotation directions, each longitudinal extrusion module comprises a pair of roller dies which are longitudinally arranged and have opposite rotation directions, and each pair of roller dies are driven to rotate in the same direction through a power mechanism and a gear transmission mechanism; the outer wall of each roller die is provided with two hole type openings along the circumferential direction, and the hole type openings from the roller die at the wire releasing end to the roller die at the wire outlet end are sequentially reduced; the alloy wire passes through the hole openings of the roller dies to be extruded and deformed once after passing through a pair of roller dies. Compared with single-pass deformation, the device can improve the production efficiency by more than 80 percent, and solves the problems of small processing deformation amount, low efficiency, cold deformation crack quality of high-strength high-temperature alloy, more deformation links during manufacturing of the high-temperature alloy and high working strength.
Description
Technical Field
The invention belongs to the field of deep processing of special alloys, and particularly relates to an MCR extrusion forming device for high-temperature alloy wire rods.
Background
Because the high-temperature alloy has high hardness and high deformation brittleness, the high-temperature alloy easily causes the quality problems of crystal structure damage and cracks in the deformation process, the traditional high-temperature alloy production mode adopts a single-pass production mode of hot wire drawing, namely, an alloy wire is heated to a certain temperature to soften the alloy wire, and then the softened alloy wire passes through a wire drawing die with the diameter smaller than that of the material to gradually reduce the diameter of the alloy wire.
Therefore, the traditional hot working and other processing modes often cause product fracture, so that staff are injured by the elasticity of the high-strength wire, and in order to solve the production problems, particularly the production technical problems of high manufacturing difficulty and unstable quality of special alloy, the application provides the MCR extrusion forming device for the high-temperature alloy wire rod.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an MCR extrusion forming device for high-temperature alloy wire rods.
In order to achieve the above purpose, the invention provides the following technical scheme:
an MCR extrusion forming device for high-temperature alloy wire rods comprises an equipment main body, and a plurality of groups of transverse extrusion modules and longitudinal extrusion modules which are arranged in the equipment main body at intervals;
each transverse extrusion module comprises a pair of horizontally arranged roller dies with opposite rotation directions, each longitudinal extrusion module comprises a pair of longitudinally arranged roller dies with opposite rotation directions, and each pair of roller dies are driven to rotate in the same direction through a power mechanism and a gear transmission mechanism;
the outer wall of each roller die is provided with two hole type openings along the circumferential direction, and the hole type openings from the roller die at the pay-off end to the roller die at the wire outlet end are sequentially reduced; and the alloy wire passes through the hole openings of the roller dies to be extruded and deformed once after passing through a pair of roller dies.
Preferably, the power mechanism of the transverse extrusion module is arranged on the back plate of the device body, and the power mechanism of the longitudinal extrusion module is arranged on the bottom plate of the device body.
Preferably, a three-stage lubrication circulation system is further included, the multi-stage lubrication circulation system comprising:
an oil tank disposed below the apparatus main body;
the oil pump is arranged in the oil tank;
and the plurality of lubricating pipelines are communicated with the oil pump, and each transverse extrusion module and each longitudinal extrusion module are matched with one lubricating pipeline.
Preferably, a recovery port communicating with the oil tank is provided at a bottom of the apparatus main body.
Preferably, the transverse extrusion modules and the longitudinal extrusion modules are 4 groups. 8 pairs of the alloy wires are extruded, 4 pairs of the alloy wires are extruded in the transverse direction and the vertical direction respectively, and the alloy wires are distributed in a transverse and vertical crossed arrangement mode, so that the alloy wires receive uniform extrusion force in the horizontal and vertical directions during extrusion deformation
Preferably, the high-temperature alloy wire winding device further comprises a wire releasing device and a wire winding device which are arranged on two sides of the equipment main body respectively, the high-temperature alloy wire to be extruded is wound on the wire releasing device, and the high-temperature alloy wire extruded by the transverse extrusion module and the longitudinal extrusion module is wound on the wire winding device.
The MCR extrusion forming device for the high-temperature alloy wire rod has the following beneficial effects:
(1) the invention redefines a new mode of cold-processing production of the special alloy wire, and the mode has high automation degree, simple operation and intensive production process;
(2) the process mode of the traditional hot processing is eliminated, the energy consumption is obviously reduced, and the problem that high energy consumption is needed for deformation of the high-temperature alloy is solved;
(3) the cleaning production is pollution-free, and the environmental problems of dust pollution and the like in hot processing are avoided;
(4) compared with the single-pass deformation of the traditional hot working, the device can improve the production efficiency by more than 80 percent, and solves the problems of small deformation amount and low efficiency of the high-strength high-temperature alloy;
(5) the technology and the process of the device enable the product to avoid the product quality trouble of cracks and burrs, and solve the problems of cold deformation crack quality of the high-temperature alloy and more deformation links and high working strength during the manufacturing of the high-temperature alloy;
(6) the production safety coefficient is high, and the process technology completely avoids the potential safety hazard.
Drawings
In order to more clearly illustrate the embodiments of the present invention and the design thereof, the drawings required for the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the invention and it will be clear to a person skilled in the art that other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural view of an MCR extrusion molding apparatus for high temperature alloy wire rods for disks in example 1 of the present invention.
Description of reference numerals:
the device comprises a device main body 1, a transverse extrusion module 2, a longitudinal extrusion module 3, a roller die 4, a power mechanism 5, a gear transmission mechanism 6, a lubricating pipeline 7, a pay-off device 8 and a take-up device 9.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention and can practice the same, the present invention will be described in detail with reference to the accompanying drawings and specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, 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. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In the description of the present invention, unless otherwise specified, "a plurality" means two or more, and will not be described in detail herein.
Example 1
The invention provides an MCR extrusion forming device for high-temperature alloy wire rods, which comprises an equipment main body 1, and a plurality of groups of transverse extrusion modules 2 and longitudinal extrusion modules 3 which are arranged in the equipment main body 1 at intervals, wherein the equipment main body comprises a main body frame and a plurality of groups of transverse extrusion modules 2 and longitudinal extrusion modules 3;
each transverse extrusion module 2 comprises a pair of roller dies 4 which are horizontally arranged and have opposite rotation directions, each longitudinal extrusion module 3 comprises a pair of roller dies 4 which are longitudinally arranged and have opposite rotation directions, and each pair of roller dies 4 are driven to rotate in the same direction through a power mechanism 5 and a gear transmission mechanism 6. Specifically, the power mechanism 5 mainly comprises a motor and components thereof, and the motor drives the gear transmission mechanism 6 to further drive the roller dies 4 to rotate in the same pair of opposite directions and the same group in the same direction for providing power for production.
The roller die 4 adopts a single body two-channel mode, so that the roller die is convenient to install and use, the service life of the roller die 4 is prolonged, and the roller die is made of high-temperature alloy steel; two hole type openings 41 are formed in the outer wall of each roller die 4 along the circumferential direction, and the hole type openings 41 from the roller die 4 at the wire outlet end to the roller die 4 at the wire outlet end are sequentially reduced; the alloy wire 6 passes through the hole-shaped openings 41 of the roller dies 4 to be extruded and deformed once after passing through each pair of roller dies 4. In the whole MCR extrusion forming process, the pass specification, namely the deformation amount of the high-temperature alloy is the key, and the product quality problems of multiple pairs of secondary roller dies 4, such as crystal structure damage, surface crack generation and the like, can be realized as much as possible. As special high-temperature alloy is produced, the hole pattern specification is determined by repeated calculation and test, so that the quality problems of no cracks and the like in the cold deformation process of the alloy are ensured to be shown in table 1.
TABLE 1 gauge table for roll dies
To explain the data in the above table, each set of the transverse extrusion module 2 or the longitudinal extrusion module 3 includes two roller dies 4, and a semicircular groove, i.e., a hole-shaped opening 41, is etched on each roller die 4. Namely, two semicircles of each pair of roller dies 4 form a circular hole pattern, the alloy wire 6 passes through the circular hole pattern to control the deformation quantity, and the size of the roller refers to the diameter of the circular hole pattern which determines the size of the alloy wire 6. The lower difference from the front roll means the amount of change in the diameter of the circular pass of the adjacent two pairs of roll dies 4.
Specifically, in this embodiment, the power mechanism 5 of the transverse extrusion module 2 is disposed on the back plate of the apparatus main body 1, and the power mechanism 5 of the longitudinal extrusion module 3 is disposed on the bottom plate of the apparatus main body 1.
In order to cool the alloy wire 6 and lubricate the equipment, the present embodiment further includes a three-stage lubrication circulation system, and the multi-stage lubrication circulation system includes an oil tank, an oil pump, and a plurality of lubrication pipelines 7. The oil tank sets up in the below of equipment main part 1, and the oil pump setting is in the oil tank, and a plurality of lubricated pipeline 7 all communicate with the oil pump, and every horizontal extrusion module 2 all cooperates with vertical extrusion module 3 and is provided with a lubricated pipeline 7. Further, in the present embodiment, in order to achieve recycling, the bottom of the apparatus main body 1 is provided with a recycling port communicating with the oil tank.
The three-stage lubrication in this embodiment refers to the lubrication of the alloy wire 6, the roller die 4, and the gears of the gear transmission mechanism 6. The lubricating oil is stored in an oil tank at the lower side of the equipment, the lubricating oil is filtered in the oil tank to be qualified and then is sequentially sent to the alloy wire 6, the roller die 4 and the equipment gear by an oil pump for lubrication, and the lubricated oil returns to the oil tank through a recovery port for recycling. Because of the characteristics of the high-temperature alloy, more heat can be generated in the cold deformation process, the metal structure is overheated and damaged due to the heat, and the heat must be output in time, so that No. 92 antiwear and pressure-resistant oil is adopted for carrying out circulating cooling, the oil also has a lubricating effect on the contact surface of the metal and the roller die 4, the abrasion of the roller die 4 is reduced, and the frictional resistance is reduced.
Further, in the present embodiment, the transverse extrusion modules 2 and the longitudinal extrusion modules 3 are 4 sets. Namely, the transverse extrusion module 2 and the longitudinal extrusion module 3 comprise 8 pairs of roller dies 4, 4 pairs of roller dies are respectively arranged in the transverse direction and the vertical direction, and the roller dies are distributed in a transverse and vertical crossed arrangement mode, so that the alloy wires 6 are uniformly extruded in the horizontal and vertical directions during extrusion deformation.
Further, in this embodiment, the high-temperature alloy wire extruding device further comprises a wire releasing device 8 and a wire winding device 9 which are respectively arranged on two sides of the device main body 1, the high-temperature alloy wire 6 to be extruded is wound on the wire releasing device 8, and the high-temperature alloy wire 6 extruded by the transverse extrusion module 2 and the longitudinal extrusion module 3 is wound on the wire winding device 9.
The MCR extrusion forming device for the high-temperature alloy wire rod provided by the embodiment has the following characteristics:
1. the linkage mode of 8 pairs of roller dies 4, 8 pairs of roller dies 4 must be strictly controlled by the designed deformation quantity and gear ratio, so that quality problems such as snapping, extrusion bulge, burrs and the like caused by mismatching of speed and deformation parameters among different roller dies 4 are prevented;
2. the deformation amount and percentage of the alloy wire 6 aiming at high strength are important bases for the production of the alloy;
3. the linkage and the speed of the take-up and pay-off wires are strictly controlled through control;
the operating principle of the MCR extrusion molding device for high-temperature alloy wire rods provided in this embodiment is as follows:
the high-temperature alloy wires 6 sequentially pass through the hole openings 41 of the roller dies 4 of the extrusion modules from the pay-off device 8, the power mechanism 5 provides extrusion power, the alloy wires 6 can be subjected to cold working deformation sequentially according to the designed hole opening size of the roller dies 4, meanwhile, the roller dies 4 of each pass are cooled and lubricated by lubricating liquid, and the metal wires subjected to cold working deformation are regularly wound by the take-up device 9. The device is used for carrying out MCR extrusion forming production on 10.00mm titanium alloy wire rods, and the wire rods are produced to 5.00mm in one step.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. An MCR extrusion forming device for high-temperature alloy wire rods is characterized by comprising an equipment main body (1), and a plurality of groups of transverse extrusion modules (2) and longitudinal extrusion modules (3) which are arranged in the equipment main body (1) at intervals;
each transverse extrusion module (2) comprises a pair of roller dies (4) which are horizontally arranged and have opposite rotation directions, each longitudinal extrusion module (3) comprises a pair of roller dies (4) which are longitudinally arranged and have opposite rotation directions, and each pair of roller dies (4) are driven to rotate in the same direction through a power mechanism (5) and a gear transmission mechanism (6);
two hole-shaped openings (41) are formed in the outer wall of each roller die (4) along the circumferential direction, and the hole-shaped openings (41) are sequentially reduced from the roller die (4) at the wire outlet end to the roller die (4) at the wire outlet end; the alloy wire (6) passes through the hole-shaped openings (41) of the roller dies (4) to be extruded and deformed, and the deformation is carried out once when the alloy wire passes through each pair of roller dies (4).
2. The MCR extrusion forming device for high-temperature alloy wire rods in disc shapes according to claim 1, wherein the power mechanism (5) of the transverse extrusion module (2) is arranged on a back plate of the device body (1), and the power mechanism (5) of the longitudinal extrusion module (3) is arranged on a bottom plate of the device body (1).
3. An MCR extrusion forming apparatus for high temperature alloy wire rods for discs as claimed in claim 1, further comprising a three-stage lubrication circulation system, the multi-stage lubrication circulation system comprising:
an oil tank disposed below the apparatus main body (1);
the oil pump is arranged in the oil tank;
a plurality of lubricated pipelines (7), all with the oil pump intercommunication, every horizontal extrusion module (2) and vertical extrusion module (3) all cooperate and are provided with one lubricated pipeline (7).
4. An MCR extrusion forming device for high-temperature alloy wire rods for discs as claimed in claim 3, wherein the bottom of the equipment main body (1) is provided with a recovery port communicated with the oil tank.
5. An MCR extrusion forming device for high-temperature alloy wire rods for discs as claimed in claim 1, wherein the transverse extrusion module (2) and the longitudinal extrusion module (3) are 4 groups.
6. The MCR extrusion forming device for the high-temperature alloy disc round wire material is characterized by further comprising a wire releasing device (8) and a wire collecting device (9) which are respectively arranged at two sides of the equipment main body (1), wherein the high-temperature alloy wire (6) to be extruded is wound on the wire releasing device (8), and the high-temperature alloy wire (6) extruded by the transverse extrusion module (2) and the longitudinal extrusion module (3) is wound on the wire collecting device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326502.XA CN114054526A (en) | 2021-11-10 | 2021-11-10 | MCR extrusion forming device for high-temperature alloy wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326502.XA CN114054526A (en) | 2021-11-10 | 2021-11-10 | MCR extrusion forming device for high-temperature alloy wire rod |
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| Publication Number | Publication Date |
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| CN114054526A true CN114054526A (en) | 2022-02-18 |
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| CN202111326502.XA Pending CN114054526A (en) | 2021-11-10 | 2021-11-10 | MCR extrusion forming device for high-temperature alloy wire rod |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4953379A (en) * | 1987-10-31 | 1990-09-04 | Dyckerhoff & Widmann Aktiengesellschaft | Hot-rolled steel bar with helically extending ribs, method of and apparatus for producing the steel bar |
| US20050044687A1 (en) * | 2003-08-28 | 2005-03-03 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) | Method for manufacturing seamed flux-cored welding wire |
| CN103722042A (en) * | 2013-12-13 | 2014-04-16 | 西安赛特思迈钛业有限公司 | Preparation device and method for Ti6A14V alloy flat filament |
| CN108202088A (en) * | 2017-11-22 | 2018-06-26 | 宁夏东方钽业股份有限公司 | A kind of processing method of small dimension titanium or titanium alloy Bar Wire Product |
| CN208357510U (en) * | 2017-12-28 | 2019-01-11 | 浙江宇光铝材有限公司 | A kind of passive type roll mill |
| CN110883120A (en) * | 2019-11-27 | 2020-03-17 | 莱芜钢铁集团有限公司 | Metallurgical steel wire roller drawing device |
| CN210676398U (en) * | 2019-07-26 | 2020-06-05 | 天长市荣达电子有限公司 | Lubricating oil circulation wire drawing device is used in power cord production |
-
2021
- 2021-11-10 CN CN202111326502.XA patent/CN114054526A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4953379A (en) * | 1987-10-31 | 1990-09-04 | Dyckerhoff & Widmann Aktiengesellschaft | Hot-rolled steel bar with helically extending ribs, method of and apparatus for producing the steel bar |
| US20050044687A1 (en) * | 2003-08-28 | 2005-03-03 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) | Method for manufacturing seamed flux-cored welding wire |
| CN103722042A (en) * | 2013-12-13 | 2014-04-16 | 西安赛特思迈钛业有限公司 | Preparation device and method for Ti6A14V alloy flat filament |
| CN108202088A (en) * | 2017-11-22 | 2018-06-26 | 宁夏东方钽业股份有限公司 | A kind of processing method of small dimension titanium or titanium alloy Bar Wire Product |
| CN208357510U (en) * | 2017-12-28 | 2019-01-11 | 浙江宇光铝材有限公司 | A kind of passive type roll mill |
| CN210676398U (en) * | 2019-07-26 | 2020-06-05 | 天长市荣达电子有限公司 | Lubricating oil circulation wire drawing device is used in power cord production |
| CN110883120A (en) * | 2019-11-27 | 2020-03-17 | 莱芜钢铁集团有限公司 | Metallurgical steel wire roller drawing device |
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Application publication date: 20220218 |