CN115198062B - Double-tensioning device annealing machine - Google Patents
Double-tensioning device annealing machine Download PDFInfo
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- CN115198062B CN115198062B CN202210855304.0A CN202210855304A CN115198062B CN 115198062 B CN115198062 B CN 115198062B CN 202210855304 A CN202210855304 A CN 202210855304A CN 115198062 B CN115198062 B CN 115198062B
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- 238000000137 annealing Methods 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 238000005491 wire drawing Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 abstract description 17
- 239000003921 oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a double-tensioning device annealing machine which comprises a base, wherein the left side of the upper end face of the base is fixedly connected with a plurality of first supporting frames, the upper end face of each first supporting frame is fixedly connected with a fixed seat, the middle part of the upper end face of each fixed seat is fixedly provided with a double-shaft motor, the output ends of the double-shaft motors are fixedly connected with rotating shafts, the other ends of the front rotating shafts are fixedly connected with paying-off rolls, the other ends of the rear rotating shafts are fixedly connected with wire collecting rolls, the outer surfaces of the paying-off rolls are fixedly connected with metal wires, the other ends of the metal wires are fixedly connected with the wire collecting rolls, tensioning devices are arranged on the front side and the rear side of the upper end face of the base, and the winding of the metal wires is more uniform through the double-tensioning devices, so that the winding quality of the metal wires is improved.
Description
Technical Field
The invention belongs to the technical field related to metal wire drawing, and particularly relates to an annealing machine with double tensioning devices.
Background
Annealing is a metal heat treatment process that involves slowly heating the metal to a temperature, holding for a sufficient period of time, and then cooling at a suitable rate. The aim is to reduce the hardness and improve the machinability; residual stress is eliminated, the size is stabilized, and the deformation and crack tendency is reduced; fine grains, adjust the structure and eliminate the defect of the structure. To be precise, annealing is a heat treatment process for materials, including metallic materials and nonmetallic materials. Wire drawing is a metal processing technique. In metal press working, a technical working method of forcing a metal through a die under an external force, compressing a cross-sectional area of the metal, and obtaining a desired cross-sectional area shape and size is called a metal drawing process. Tools that change shape and size are called dies. The surface wiredrawing treatment is a surface treatment means for forming lines on the surface of a workpiece by grinding a product to achieve a decorative effect. The surface wire drawing treatment can embody the texture of the metal material, so that the metal wire drawing treatment is favored by more and more users and is widely applied.
Patent CN201810565934.8 discloses a cable annealing broken line anti-winding device, including the annealing machine body, the spout has been seted up in the front of annealing machine body, be provided with the slider in the spout, the upper surface joint of slider has the sliding sleeve, the slide bar has been cup jointed in the sliding sleeve, the top and the bottom of slide bar respectively with the upper surface and the lower fixed surface of spout inner wall are connected. According to the broken wire winding preventing device for the cable annealing machine, by arranging the cable driving wheel, the roller, the sleeve, the rotating device, the fixed pulley and the sliding rod, a worker controls the annealing machine body to work so that the cable driving wheel rotates, the cable driving wheel can drive the cable to move, when the cable breaks, the sliding sleeve cannot be subjected to the force of supporting the cable any more, the fixing plate can block the broken end of the cable, the broken cable cannot be continuously wound on the cable driving wheel which continuously runs before the machine is stopped, the work of the annealing machine body cannot be influenced, and the cable driving wheel cannot be damaged
However, the device is assembled by adopting complete processing equipment, which leads to the lengthening of the wiredrawing working line, the wire running speed in the processing process is difficult to keep stable, and the metal wire cannot keep constant tension, so that the winding effect of the metal wire is affected.
Disclosure of Invention
The invention aims to provide a double-tensioning device annealing machine, which aims at the defects and the shortcomings of the prior art, and the double-tensioning device enables the winding of metal wires to be more uniform, so that the winding quality of the metal wires is improved, and compared with manual winding, the double-tensioning device annealing machine is good in winding effect and time-saving and labor-saving.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a two overspeed device tensioner annealing machine, includes the base, the up end left side fixedly connected with of base a plurality of first support frames, the up end fixedly connected with fixing base of first support frame, the up end middle part fixed mounting of fixing base has biax motor, the equal fixedly connected with axis of rotation of output of biax motor, the other end fixedly connected with unwrapping wire roller of front side axis of rotation, the other end fixedly connected with receipts line roller of rear side axis of rotation, the surface fixedly connected with wire of unwrapping wire roller, the other end and the receipts line roller fixed connection of wire, the up end front and back side of base all is provided with overspeed device tensioner, the up end right side fixedly connected with mount table of base, the mount table is located overspeed device tensioner's right side, the up end front side fixedly mounted of mount table has oil coating tank and wire drawing mould, the up end rear side fixedly mounted of mount table has annealing box and cooling box.
Preferably, the tensioning device comprises a tensioning support, a tensioning motor is fixedly arranged on the upper end face of the tensioning support, an output rotating shaft is fixedly connected to the output end of the tensioning motor, a screw rod is fixedly connected to the other end of the output rotating shaft, a supporting block is connected to the outer surface of the screw rod in a threaded mode, a first guide wheel is fixedly connected to the front end face of the supporting block, and a second guide wheel is fixedly connected to the left side and the right side of the front end face of the tensioning support.
Preferably, the oil filling port is fixedly connected to the left side and the right side of the upper end face of the oil coating tank, through holes are formed in the oil coating tank corresponding to the metal wires, brush heads are arranged at the left end and the right end of the through holes corresponding to the metal wires, and tampons are arranged at the left end and the right end of the brush heads.
Preferably, the front side and the rear side of the upper end surface of the mounting table are respectively provided with a positioning device, the positioning devices comprise a positioning bracket and a positioning wheel, the front side positioning devices are arranged between the oil coating tank and the wire drawing die, and the rear side positioning devices are arranged between the annealing tank and the cooling tank.
Preferably, the front side and the rear side of the upper end surface of the base are fixedly connected with second supporting frames, the front side and the rear side of the second supporting frames are all arranged on the right side of the mounting table, and the upper end surface of the second supporting frames is fixedly connected with a third guide wheel.
Preferably, the double-shaft motor, the tensioning motor, the annealing box and the cooling box are all electrically connected with an external power supply.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting up first set overspeed device tensioner on the wire-releasing roll right side for the wire is tensioning before wire drawing annealing, can improve wire drawing quality, sets up the guide roll between each device and guarantees the stability of wire in transmission process, after the wire is annealed through the wire drawing, sets up second set overspeed device tensioner on the wire-collecting roll right side, lets the wire carry out the tensioning of secondary before the receipts line, further promotes wire drawing quality.
2. Through scribbling the oil tank, inside stone silver can fully absorb inside lubricating oil, and six brush heads that set up can be even the coating on the surface of metal silk thread, have reduced the resistance that the metal silk thread removed, have avoided the metal silk thread by the wire drawing after the problem of oxidation, have ensured the quality after the metal silk thread wire drawing, have increased the work efficiency of two overspeed device tensioner annealing machines.
3. The winding of metal wire is more even through two overspeed device tensioner, has solved the metal wire and has twined the problem that influences the receipts line quality more in disorder easily on receiving the material roller, compares in artifical winding, not only the winding is effectual, and labour saving and time saving.
Drawings
FIG. 1 is a schematic diagram of a dual tensioner annealing machine according to the present invention;
FIG. 2 is a schematic diagram of a dual tensioner annealing machine according to the present invention;
FIG. 3 is a schematic view of a tensioning device according to the present invention;
FIG. 4 is a schematic diagram of the internal structure of the oiling box according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 1A in accordance with the present invention;
in the figure: 1. a base; 2. a first support frame; 3. a fixing seat; 4. a wire releasing roller; 5. a rotating shaft; 6. a biaxial motor; 7. a wire winding roller; 8. a second guide wheel; 9. a metal wire; 10. tensioning a motor; 11. a screw rod; 12. a support block; 13. oil coating tank; 14. drawing a wire mould; 15. an annealing box; 16. a cooling box; 17. a fuel filler; 18. a tampon; 19. a brush head; 20. tensioning a bracket; 21. a mounting table; 22. a second support frame; 23. a first guide wheel; 24. a positioning bracket; 25. a positioning wheel; 26. and a third guide wheel.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the embodiments 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 embodiments of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a two overspeed device tensioner annealing machine, including base 1, the up end left side fixedly connected with of base 1 a plurality of first support frames 2, the up end fixedly connected with fixing base 3 of first support frames 2, the up end middle part fixed mounting of fixing base 3 has biax motor 6, the output of biax motor 6 is all fixedly connected with axis of rotation 5, the other end fixedly connected with paying off roll 4 of front side axis of rotation 5, the other end fixedly connected with receipts line roller 7 of rear side axis of rotation 5, the surface fixedly connected with wire 9 of paying off roll 4, the other end and the receipts line roller 7 fixed connection of wire 9, the up end front and back side of base 1 all is provided with overspeed device tensioner, up end right side fixedly connected with mount table 21 of base 1, mount table 21 is located overspeed device tensioner's right side, the up end front side fixedly mounted of mount table 21 has coating tank 13 and wire drawing die 14, the up end rear side fixedly mounted with annealing tank 15 and cooling tank 16 of mount table 21.
The tensioning device comprises a tensioning support 20, a tensioning motor 10 is fixedly mounted on the upper end face of the tensioning support 20, an output rotating shaft is fixedly connected to the output end of the tensioning motor 10, a screw rod 11 is fixedly connected to the other end of the output rotating shaft, a supporting block 12 is connected to the outer surface of the screw rod 11 in a threaded mode, a first guide wheel 23 is fixedly connected to the front end face of the supporting block 12, and a second guide wheel 8 is fixedly connected to the left side and the right side of the front end face of the tensioning support 20.
In order to facilitate oiling at any time, the left and right sides of the upper end surface of the oiling box 13 are fixedly connected with oiling ports 17, the oiling box 13 is provided with through holes corresponding to the metal wires 9, the left and right ends of the through holes are provided with brush heads 19 corresponding to the metal wires 9, in order to uniformly coat the metal wires 9, the left and right sides of the through holes are provided with three brush heads 19, the left and right ends of the brush heads 19 are provided with tampons 18, the moving resistance of the metal wires 9 is reduced, the problem that the metal wires 9 are oxidized after being drawn is avoided, the quality of the metal wires after being drawn 9 is ensured,
in order to enhance the stability of the metal wire in the winding process, positioning devices are arranged on the front side and the rear side of the upper end face of the mounting table 21, and comprise a positioning bracket 24 and a positioning wheel 25, wherein the front side positioning device is arranged between the oil coating tank 13 and the wire drawing die 14, and the rear side positioning device is arranged between the annealing tank 15 and the cooling tank 16.
When the metal wire 9 comes out of the wire drawing die, in order to enable the metal wire 9 to stably reach the annealing box 15 at the bottom rear side, the front side and the rear side of the upper end surface of the base 1 are fixedly connected with second support frames 22, the front side and the rear side of the second support frames 22 are all arranged on the right side of the mounting table 21, and the upper end surface of the second support frames 22 is fixedly connected with a third guide wheel 26.
The double-shaft motor 6, the tensioning motor 10, the annealing box 15 and the cooling box 16 are all electrically connected with an external power supply.
The working principle and the using flow of the invention are as follows: after the wire drawing device is installed, the double-shaft motor 6 is started, the double-shaft motor 6 rotates with the rotating shaft 5, the rotating shaft 5 rotates with the paying-off roller and pulls the metal wire 9 to move rightwards to the front side tensioning device, the tensioning motor 10 is started, the output end of the tensioning motor 10 drives the output rotating shaft fixedly connected with the tensioning motor to rotate, the screw rod 11 is further driven to rotate, the supporting block in threaded connection with the outer surface of the screw rod 11 moves up and down along with the movement of the screw rod 11, the first guide wheel 23 is further driven to move, under the cooperation of the second guide theory, the metal wire 9 is tensioned, then the metal wire 9 starts to move, when the metal wire 9 enters the oiling box 13, the brush head 19 is arranged to suck oil in the oiling box 13 through the cotton sliver 18 and uniformly coat the surface of the metal wire 9, then the metal wire 9 moves into the drawing die 14, the metal wire 9 is drawn through the third guide wheel 26 and then moves into the annealing box 15, the metal wire 9 is cooled, and when the metal wire 9 comes out of the cooling box 16, the metal wire 9 is tensioned, the rear side tensioning device stretches the metal wire 9, the metal wire 7 is wound up, the wire winding device is connected with the front side tensioning device, the wire winding device is wound, the wire winding quality of the wire is improved, and the wire is wound by the wire is wound, and the wire is wound by the wire 5, and the wire is wound.
In the description of the present invention, the terms "first," "second," "another," "yet another" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a two overspeed device tensioner annealing machine, includes base (1), its characterized in that: the novel wire drawing machine comprises a base (1), wherein a plurality of first supporting frames (2) are fixedly connected to the left side of the upper end face of the base (1), a fixing seat (3) is fixedly connected to the upper end face of the first supporting frames (2), a double-shaft motor (6) is fixedly installed in the middle of the upper end face of the fixing seat (3), a rotating shaft (5) is fixedly connected to the output end of the double-shaft motor (6), a wire drawing roller (4) is fixedly connected to the other end of the front rotating shaft (5), a wire collecting roller (7) is fixedly connected to the other end of the rear rotating shaft (5), a wire (9) is fixedly connected to the outer surface of the wire drawing roller (4), tensioning devices are arranged on the front side and the rear side of the upper end face of the base (1), a mounting table (21) is fixedly connected to the right side of the upper end face of the tensioning devices, a wire drawing tank (13) and a wire drawing die (14) are fixedly installed on the front side of the upper end face of the mounting table (21), and a fire box (16) and a cooling box (16) are fixedly installed on the upper end face of the mounting table (21).
The tensioning device comprises a tensioning support (20), a tensioning motor (10) is fixedly arranged on the upper end face of the tensioning support (20), an output rotating shaft is fixedly connected to the output end of the tensioning motor (10), a screw rod (11) is fixedly connected to the other end of the output rotating shaft, a supporting block (12) is connected to the outer surface of the screw rod (11) in a threaded mode, a first guide wheel (23) is fixedly connected to the front end face of the supporting block (12), and a second guide wheel (8) is fixedly connected to the left side and the right side of the front end face of the tensioning support (20).
2. A dual tensioner annealing machine as set forth in claim 1, wherein: the oil coating box is characterized in that oil filling ports (17) are fixedly connected to the left side and the right side of the upper end face of the oil coating box (13), through holes are formed in the oil coating box (13) corresponding to the metal wires (9), brush heads (19) are arranged at the left end and the right end of the through holes corresponding to the metal wires (9), and tampons (18) are arranged at the left end and the right end of the brush heads (19).
3. A dual tensioner annealing machine as set forth in claim 1, wherein: the front side and the rear side of the upper end surface of the mounting table (21) are respectively provided with a positioning device, each positioning device comprises a positioning bracket (24) and a positioning wheel (25), the front side positioning device is arranged between the oil coating tank (13) and the wire drawing die (14), and the rear side positioning device is arranged between the annealing tank (15) and the cooling tank (16).
4. A dual tensioner annealing machine as set forth in claim 1, wherein: the front side and the rear side of the upper end face of the base (1) are fixedly connected with second supporting frames (22), the front side and the rear side of the second supporting frames (22) are all arranged on the right side of the mounting table (21), and the upper end face of the second supporting frames (22) is fixedly connected with a third guide wheel (26).
5. A dual tensioner annealing machine as set forth in claim 1, wherein: the double-shaft motor (6), the tensioning motor (10), the annealing box (15) and the cooling box (16) are all electrically connected with an external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210855304.0A CN115198062B (en) | 2022-07-19 | 2022-07-19 | Double-tensioning device annealing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210855304.0A CN115198062B (en) | 2022-07-19 | 2022-07-19 | Double-tensioning device annealing machine |
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| Publication Number | Publication Date |
|---|---|
| CN115198062A CN115198062A (en) | 2022-10-18 |
| CN115198062B true CN115198062B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210855304.0A Active CN115198062B (en) | 2022-07-19 | 2022-07-19 | Double-tensioning device annealing machine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002068598A (en) * | 2000-08-23 | 2002-03-08 | Hitachi Cable Ltd | Continuous annealing winder for wire rod |
| CN205763002U (en) * | 2016-05-26 | 2016-12-07 | 江西江冶实业有限公司 | A kind of wire drawing and annealing machine of pair of tensioner |
| CN206810868U (en) * | 2017-06-22 | 2017-12-29 | 江西吉恩重工有限公司 | A kind of cable wire drawing tensioning apparatus |
| CN208357511U (en) * | 2018-06-08 | 2019-01-11 | 无锡市锡山江海机械制造有限公司 | A kind of wire drawing and annealing machine of double tensioning apparatus |
| CN110564927A (en) * | 2019-09-09 | 2019-12-13 | 东莞市营特电子科技有限公司 | Four-pressing four-annealing anhydrous annealing mechanism |
| CN111421007A (en) * | 2020-04-14 | 2020-07-17 | 江苏鑫立强机械科技有限公司 | Wire drawing annealing machine with double tensioning devices |
-
2022
- 2022-07-19 CN CN202210855304.0A patent/CN115198062B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002068598A (en) * | 2000-08-23 | 2002-03-08 | Hitachi Cable Ltd | Continuous annealing winder for wire rod |
| CN205763002U (en) * | 2016-05-26 | 2016-12-07 | 江西江冶实业有限公司 | A kind of wire drawing and annealing machine of pair of tensioner |
| CN206810868U (en) * | 2017-06-22 | 2017-12-29 | 江西吉恩重工有限公司 | A kind of cable wire drawing tensioning apparatus |
| CN208357511U (en) * | 2018-06-08 | 2019-01-11 | 无锡市锡山江海机械制造有限公司 | A kind of wire drawing and annealing machine of double tensioning apparatus |
| CN110564927A (en) * | 2019-09-09 | 2019-12-13 | 东莞市营特电子科技有限公司 | Four-pressing four-annealing anhydrous annealing mechanism |
| CN111421007A (en) * | 2020-04-14 | 2020-07-17 | 江苏鑫立强机械科技有限公司 | Wire drawing annealing machine with double tensioning devices |
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| CN115198062A (en) | 2022-10-18 |
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