Compact metal wire straightening shaft and long arc straightening die

Abstract

The invention discloses a compact metal wire straightening shaft which comprises a wire inlet part, a wire arranging part, a connecting part, a straightening part and a wire outlet part, a wire inlet cavity, a wire arranging cavity, a straightening cavity and a wire outlet cavity are formed in the wire inlet part, the wire arranging part, the straightening part and the wire outlet part respectively, and a device cavity is further formed in the upper end of the wire arranging part. The invention further discloses a long arc straightening die which comprises a straightening assembly and a hydraulic assembly, and the straightening assembly is composed of a plurality of long arc-shaped clamping plates, a plurality of sliding ejector rods and a plurality of reset springs and used for clamping the metal wire to provide straightening force. Metal wires can be uniformly and efficiently lubricated, abrasion is reduced, product quality is improved, the radiating fins can dissipate heat along with movement, the problem that equipment is overheated is solved, stable operation is guaranteed, the long-arc straightening die is matched with the hydraulic assembly through straightening, wires of different specifications are accurately straightened, in addition, the overall structure is compact, space is saved, the machining procedure is simplified, cost is reduced, and production efficiency is improved. The comprehensive performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal wire processing, and in particular to a compact metal wire straightening shaft and a long arc straightening die. Background Art

[0002] The metal wire produced by metal wire manufacturers will be rolled into metal wire coils from coils to finished products. However, when used in applications and workplaces, they are generally straightened and cut to a fixed length before use. The straightening shaft structure currently used has multiple straightening modules inside, which achieve multi-point straightening through repeated winding at multiple points, and both ends of the straightening shaft are mounted and supported by a bearing seat and a bearing respectively.

[0003] In order to solve the above problems, the Chinese patent publication number "CN113042652A" proposes a compact metal wire straightening shaft and a long arc straightening mold, which mainly designs a bearing seat as a support for the straightening shaft. The bearing seat is processed and formed in one step. The straightening shaft has high concentricity after installation and can obtain a higher rotation speed. At the same time, the heat generation is small, which saves space inside the straightening shaft, reduces the number of parts used, reduces the overall volume and simplifies the processing procedures. However, in this solution, a lubrication system for the metal wire is not designed. During the straightening process, the surface of the metal wire is easily damaged due to excessive friction, which affects subsequent processing and use. Although the heat generation of the above solution is small, it will also cause overheating after long-term accumulation. It is necessary to design a heat dissipation structure to solve the overheating problem caused by long-term work. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a compact metal wire straightening shaft and a long arc straightening die.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A compact metal wire straightening shaft comprises a wire inlet portion, a wire arranging portion, a connecting portion, a straightening portion and a wire outlet portion, wherein the wire inlet portion, the wire arranging portion, the straightening portion and the wire outlet portion are respectively provided with a wire inlet cavity, a wire arranging cavity, a straightening cavity and a wire outlet cavity, and the upper end of the wire arranging portion is also provided with a device cavity, and a lubrication system is installed in the device cavity, and the lubrication system is composed of a lubrication component, an oil delivery component, a lubrication power component and an oil delivery power component;

[0007] The lubrication assembly is composed of elastic cotton and a cam, and is used to wipe and lubricate the metal wire;

[0008] The oil delivery assembly is composed of an oil storage barrel, an oil delivery pipe and an oil inlet pipe, and is used to deliver lubricating oil to the elastic cotton. One end of the oil delivery pipe is connected to the lower end of the oil storage barrel, and the other end is arranged on the elastic cotton. One end of the oil inlet pipe is arranged at the lower end of the oil storage barrel, and the other end is connected to an external oil source.

[0009] The lubrication power assembly is composed of a track rod, a sliding sleeve, an electric push rod and a first connecting piece, and is used to provide a rotational force for the cam. The track rod is fixed between the inner walls of the device cavity, a pair of sliding sleeves are symmetrically slidably sleeved on the track rod, and the first connecting piece is fixed to the telescopic end of the electric push rod;

[0010] The oil delivery power assembly is composed of a piston and a bent rod, which is used to provide driving force for the flow of lubricating oil. The piston is sealingly and slidably connected between the inner wall of the oil storage barrel, and the bent rod is fixedly connected between the first connecting member and the piston;

[0011] The first connecting member is connected to the sliding sleeve via a first transmission mechanism, and the sliding sleeve is transmission-connected to the cam via a second transmission mechanism;

[0012] A long arc straightening die is installed in the straightening cavity.

[0013] Preferably, the first transmission mechanism comprises a pair of second connecting members and a connecting rod, the pair of second connecting members are respectively fixed on a pair of sliding sleeves, and both ends of the pair of connecting rods are rotatably connected to the first connecting member and the second connecting member respectively.

[0014] Preferably, the second transmission mechanism includes a rack, a first gear and a second gear, the rack is fixedly arranged at the lower end of the sliding sleeve, the first gear and the second gear are both rotatably connected to the inner wall of the device cavity, the first gear is respectively meshed with the rack and the second gear, and the second gear is fixedly connected to the cam.

[0015] Preferably, a one-way valve is installed in the oil inlet pipe to only allow lubricating oil to flow from the external oil source into the oil storage barrel, and a one-way valve is installed in the oil delivery pipe to only allow lubricating oil to flow from the oil storage barrel to the elastic cotton.

[0016] Preferably, a pair of side walls of the sliding sleeves are fixedly connected with a plurality of copper heat dissipation fins, the heat dissipation fins extend through and extend to the outside of the straightening shaft, and the heat dissipation fins can move as the sliding sleeves slide.

[0017] A long arc straightening die, comprising a straightening assembly and a hydraulic assembly, wherein the straightening assembly is composed of a plurality of long arc clamping plates, a plurality of sliding push rods and a plurality of return springs, and is used to clamp a metal wire to provide a correction force, wherein the plurality of arc clamping plates are distributed in a ring shape in a straightening cavity, the plurality of sliding push rods are evenly distributed on the outer side wall of the long arc clamping plates, and the plurality of return springs are sleeved on the outside of the sliding push rods and elastically connected between the long arc clamping plates and the inner wall of the straightening cavity;

[0018] The hydraulic assembly consists of a hydraulic oil cavity, a transfer cavity and a hydraulic plug. The hydraulic oil cavity is opened in the connecting part and stores hydraulic oil. A plurality of the transfer cavities are annular and are arranged in the straightening part. The hydraulic plug is sealingly and slidably connected in the transfer cavity and is fixedly connected to the sliding push rod. The hydraulic plug is controlled by a pumping mechanism to produce a movement.

[0019] Preferably, the pumping mechanism comprises an oil pump and an oil guide pipe, the oil pump is fixedly mounted on the side wall of the connecting portion and is connected to the hydraulic oil cavity, one end of the oil guide pipe is connected to the oil pump, and the other end is connected to the transfer cavity.

[0020] Preferably, the hydraulic oil cavity has a ring-shaped cross section, is arranged to bypass the straightening cavity, and has an oil nozzle on the surface of the connecting portion.

[0021] The present invention has the following beneficial effects:

[0022] 1. The present invention sets a lubrication system consisting of a lubrication component, an oil delivery component, a lubrication power component and an oil delivery power component in the device cavity at the upper end of the wire-straightening part. The lubrication component consisting of elastic cotton and a cam wipes and lubricates the metal wire, and the oil delivery component accurately supplies oil, which can effectively avoid damage to the metal wire due to excessive surface friction during the straightening process, improve the surface quality of the metal wire, provide a better foundation for subsequent processing, reduce the scrap rate, and improve production efficiency and product quality;

[0023] 2. A pair of sliding sleeve side walls are fixedly connected with copper heat dissipation fins that can extend to the outside of the straightening shaft and move with the sliding sleeve. This design greatly increases the heat dissipation area, can timely dissipate the heat generated during the operation of the equipment, effectively solves the overheating problem caused by long-term work accumulation, ensures the stable operation of the equipment, extends the service life of the equipment, and reduces equipment failures and maintenance costs caused by overheating;

[0024] 3. The long arc straightening mold adopts a straightening component composed of multiple long arc splints, multiple sliding ejectors and multiple reset springs, and cooperates with a hydraulic component composed of a hydraulic oil cavity, a transfer cavity and a hydraulic plug. According to the characteristics of different metal wires, the action of the hydraulic plug can be accurately controlled by the pump mechanism, and then the clamping force of the long arc splint on the metal wire can be adjusted to achieve precise straightening, improve the accuracy and stability of straightening, and meet the diverse needs of metal wire straightening in different working occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the internal structure of a compact metal wire straightening shaft proposed by the present invention;

[0026] Figure 2This is a front structural schematic diagram of the lubrication system proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the back structure of the lubrication system proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the internal structure connection of the oil storage barrel proposed by the present invention;

[0029] Figure 5 A schematic structural diagram of a straightening assembly of a long arc straightening die proposed by the present invention;

[0030] Figure 6 This is a schematic diagram of the external structure of a compact metal wire straightening shaft proposed by the present invention.

[0031] In the figure: 1, wire inlet; 2, wire management; 3, device chamber; 4, lubrication system; 401, electric push rod; 402, track rod; 403, sliding sleeve; 404, first connecting member; 405, second connecting member; 406, connecting rod; 407, cam; 408, oil storage barrel; 409, oil pipeline; 410, oil inlet pipe; 411, rack; 412, first gear; 413, second gear ; 414, piston; 415, bending rod; 5, connecting part; 6, cooling fins; 7, straightening part; 8, long arc straightening mold; 801, long arc splint; 802, sliding push rod; 803, reset spring; 9, straightening cavity; 10, outlet part; 11, inlet cavity; 12, elastic cotton; 13, wire management cavity; 14, hydraulic oil cavity; 15, transfer cavity; 16, hydraulic plug; 17, outlet cavity. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Embodiment 1

[0034] Reference Figure 1-4 A compact metal wire straightening shaft comprises a wire inlet portion 1, a wire management portion 2, a connecting portion 6, a straightening portion 7 and a wire outlet portion 10.

[0035] The inlet part 1, the wire management part 2, the straightening part and the outlet part 10 are respectively provided with an inlet cavity 11, a wire management cavity 13, a straightening cavity 9 and an outlet cavity 17. The upper end of the wire management part 2 is also provided with a device cavity 3. A lubrication system 4 is installed in the device cavity 3. The lubrication system 4 is composed of a lubrication component, an oil delivery component, a lubrication power component and an oil delivery power component.

[0036] The lubrication assembly is composed of elastic cotton 12 and cam 407, and is used to wipe and lubricate the metal wire;

[0037] The oil delivery assembly consists of an oil storage barrel 408, an oil delivery pipe 409 and an oil inlet pipe 410, which are used to deliver lubricating oil to the elastic cotton 12. One end of the oil delivery pipe 409 is connected to the lower end of the oil storage barrel 409, and the other end is arranged on the elastic cotton 12. One end of the oil inlet pipe 410 is arranged at the lower end of the oil storage barrel 409, and the other end is connected to an external oil source. A one-way valve is installed in the oil inlet pipe 410, which only allows lubricating oil to flow from the external oil source into the oil storage barrel 408. A one-way valve is installed in the oil delivery pipe 409, which only allows lubricating oil to flow from the oil storage barrel 408 to the elastic cotton 12.

[0038] The lubrication power assembly is composed of a track rod 402, a sliding sleeve 403, an electric push rod 401 and a first connecting member 404, and is used to provide a rotational force for the cam 407. The track rod 402 is fixed between the inner walls of the device cavity 3, a pair of sliding sleeves 403 are symmetrically slidably sleeved on the track rod 402, and the first connecting member 404 is fixed on the telescopic end of the electric push rod 401;

[0039] The first connecting member 404 is connected to the sliding sleeve 403 through a first transmission mechanism. The first transmission mechanism includes a pair of second connecting members 405 and a connecting rod 406. The pair of second connecting members 405 are respectively fixed on a pair of sliding sleeves 403, and both ends of the pair of connecting rods 406 are rotatably connected to the first connecting member 404 and the second connecting member 405.

[0040] The oil delivery power assembly is composed of a piston 414 and a bent rod 415, which is used to provide driving force for the flow of lubricating oil. The piston 414 is sealingly and slidably connected between the inner wall of the oil storage barrel 408, and the bent rod 415 is fixedly connected between the first connecting member 404 and the piston 414;

[0041] The sliding sleeve 403 is connected to the cam 407 through a second transmission mechanism, and the second transmission mechanism includes a rack 411, a first gear 412 and a second gear 413. The rack 411 is fixedly arranged at the lower end of the sliding sleeve 403, and the first gear 412 and the second gear 413 are both rotatably connected to the inner wall of the device cavity 3. The first gear 412 is respectively meshed with the rack 411 and the second gear 413, and the second gear 413 is fixedly connected to the cam 407.

[0042] A long arc straightening die 8 is installed in the straightening cavity 9.

[0043] In this embodiment, when the metal wire is processed, the compact metal wire straightening shaft starts to operate. The metal wire enters the wire inlet cavity 11 of the wire inlet part 1 from the outside, and the wire inlet part guides it to smoothly enter the straightening shaft to prepare for the subsequent process.

[0044] Next, the metal wire enters the wire-managing cavity 13 of the wire-managing part 2, where it is preliminarily organized to regularize its position and direction, thereby reducing the problems of offset and entanglement during straightening. The metal wire after the wire-managing cavity enters the straightening cavity 9 of the straightening part 7, and the long arc straightening mold 8 in the cavity is the key to straightening. At the same time, the wire-out cavity 17 of the wire-out part 10 is waiting to receive the straightened metal wire and convey it to the next link. During the straightening process, the lubrication system located in the device cavity 3 at the upper end of the wire-managing part 2 is crucial. It is composed of lubrication, oil delivery, lubrication power and oil delivery power components.

[0045] When the lubrication power assembly is working, the electric push rod 401 is started, and its telescopic end drives the first connecting member 404. The first connecting member 404 enables a pair of sliding sleeves 403 to slide symmetrically along the track rod 402 through a pair of connecting rods 406 and a second connecting member 405.

[0046] The rack 411 at the lower end of the sliding sleeve 403 moves therewith, driving the first gear 412 meshing therewith to rotate, thereby causing the cam 407 fixedly connected to the second gear 413 to rotate, thereby providing energy for the lubrication assembly.

[0047] At the same time, the oil delivery power assembly works in coordination. The first connecting member 404 drives the piston 414 to slide in the oil storage barrel 408 through the bending rod 415. In terms of the oil delivery assembly, the lubricating oil from the external oil source flows into the oil storage barrel 408 through the oil inlet pipe 410 (with a one-way valve inside to prevent backflow), and the piston 414 drives the lubricating oil to flow to the elastic cotton 12 through the oil delivery pipe 409 (with a one-way valve inside).

[0048] Finally, the rotating cam 407 acts on the elastic cotton 12, causing it to wipe the passing metal wire and evenly apply lubricating oil, thereby reducing friction, reducing wear, and improving the straightening quality and efficiency.

[0049] Embodiment 2

[0050] Different from the first embodiment, Figure 1 and Figure 6 A plurality of copper heat dissipation fins 6 are fixedly connected to the side walls of a pair of sliding sleeves 403 . The heat dissipation fins 6 extend through and extend to the outside of the straightening shaft, and the heat dissipation fins 6 can move as the sliding sleeves 403 slide.

[0051] In this embodiment, when the straightening shaft starts to work, the electric push rod 401 extends and retracts, driving the first connecting member 404 to move, and then the first transmission mechanism causes the pair of sliding sleeves 403 to slide symmetrically along the track rod 402. In this process, since the heat dissipation fins 6 are fixedly connected to the side wall of the sliding sleeve 403, the heat dissipation fins 6 will move together with the sliding of the sliding sleeve 403.

[0052] During the long-term operation of the straightening shaft, each component will generate heat due to friction and other reasons, causing the temperature of the equipment to rise. At this time, the copper heat dissipation fins 6 extending to the outside of the straightening shaft play a role. Copper has good thermal conductivity and can quickly absorb the heat generated inside the straightening shaft, especially near the sliding sleeve 403.

[0053] As the sliding sleeve 403 slides, the position of the heat sink 6 changes continuously, which makes the heat sink 6 more fully contact with the surrounding air and increases the heat exchange area with the air. Through natural convection and heat radiation, the heat is transferred from the heat sink 6 to the surrounding air, thereby effectively dissipating the heat inside the straightening shaft, reducing the overall temperature of the straightening shaft, avoiding overheating due to long-term work, ensuring that the straightening shaft can operate stably and efficiently, and extending the service life of the equipment. At the same time, it also helps to maintain the performance of various components of the equipment and ensure the quality of the metal wire straightening work.

[0054] Embodiment 3

[0055] Reference Figure 1 , Figure 5 and Figure 6 Compared with the first and second embodiments, this embodiment further proposes a long arc straightening mold, including a straightening component and a hydraulic component.

[0056] The straightening assembly is composed of a plurality of long arc-shaped clamping plates 801, a plurality of sliding push rods 802 and a plurality of return springs 803, and is used to clamp the metal wire to provide a correction force. The plurality of arc-shaped clamping plates 801 are distributed in a ring shape in the straightening cavity 9, and the plurality of sliding push rods 802 are evenly distributed on the outer wall of the long arc-shaped clamping plates 801. The plurality of return springs 803 are sleeved on the outside of the sliding push rods 802 and are elastically connected between the long arc-shaped clamping plates 801 and the inner wall of the straightening cavity.

[0057] The hydraulic assembly consists of a hydraulic oil chamber 14, a transfer chamber 15 and a hydraulic plug 16. The hydraulic oil chamber 14 is opened in the connecting portion 5 and stores hydraulic oil. Multiple transfer chambers are arranged in a ring shape in the straightening portion 7. The hydraulic plug 16 is sealingly and slidably connected in the transfer chamber 15 and is fixedly connected to the sliding push rod 802. The hydraulic plug 16 is controlled by the pumping mechanism to produce a movement.

[0058] The pumping mechanism includes an oil pump 19 and an oil guide pipe 18 . The oil pump 19 is fixedly mounted on the side wall of the connecting portion 5 and communicated with the hydraulic oil cavity 14 . One end of the oil guide pipe 18 is communicated with the oil pump 19 , and the other end is communicated with the transfer cavity 15 .

[0059] The cross section of the hydraulic oil chamber 14 is annular, and is arranged to bypass the straightening chamber 9, and an oil nozzle is arranged on the surface of the connecting portion.

[0060] In this embodiment, the long arc straightening die is in an initial state before the metal wire enters the straightening cavity 9. At this time, the multiple return springs 803 are in a state of natural extension or maintaining a certain preload, so that the multiple long arc clamping plates 801 are distributed in a ring around the straightening cavity 9 and keep a certain distance from each other, reserving space for the metal wire to enter.

[0061] When the metal wire enters the straightening cavity 9, the long arc clamping plate 801 is elastically connected to the inner wall of the straightening cavity through the reset spring 803. Under the elastic force of the reset spring 803, the long arc clamping plate 801 will move closer to the metal wire and initially hold the metal wire. Multiple long arc clamping plates 801 form an embrace around the metal wire from different directions, providing basic clamping force for subsequent straightening operations.

[0062] In order to achieve precise straightening of metal wires of different specifications and shapes, it is necessary to adjust the clamping force of the long arc clamp 801 on the metal wire according to actual conditions, and then the hydraulic component starts to work.

[0063] The oil pump 19 is fixedly mounted on the side wall of the connecting portion 5. After the oil pump 19 is started, it starts to extract hydraulic oil from the hydraulic oil cavity 14. The hydraulic oil cavity 14 is annular in cross section, bypassing the straightening cavity 9, and an oil nozzle is provided on the surface of the connecting portion. This design ensures the storage of hydraulic oil and avoids interference with the straightening operation in the straightening cavity 9.

[0064] After the hydraulic oil is pumped out from the hydraulic oil cavity 14 by the oil pump 19, it is transported through the oil guide pipe 18. One end of the oil guide pipe 18 is connected to the oil pump 19, and the other end is connected to the transfer cavity 15, so as to smoothly guide the hydraulic oil into the transfer cavity 15.

[0065] A plurality of transfer cavities 15 are evenly distributed in the straightening portion 7 in an annular shape, and a hydraulic plug 16 is sealed and slidably connected in each transfer cavity 15. The hydraulic oil entering the transfer cavity 15 pushes the hydraulic plug 16 to slide therein.

[0066] Since the hydraulic plug 16 is fixedly connected to the sliding push rod 802, the sliding of the hydraulic plug 16 will drive the sliding push rod 802 to move. The sliding push rod 802 is evenly distributed on the outer wall of the long arc clamping plate 801. When the sliding push rod 802 moves, it will push the long arc clamping plate 801 to move closer to or away from the metal wire, thereby adjusting the clamping force of the long arc clamping plate 801 on the metal wire.

[0067] As the metal wire moves in the straightening cavity, the long arc clamping plate 801, under the control of the hydraulic assembly, adjusts the clamping force in real time according to the specific conditions of the metal wire, and applies a continuous and precise correction force to the metal wire. In this process, multiple long arc clamping plates 801 squeeze and adjust the metal wire from different angles, so that it gradually changes from a bent state to a straight state, completing the straightening operation.

[0068] When the metal wire is straightened and leaves the straightening chamber 9, the oil pump 19 stops working, and the hydraulic oil pressure in the hydraulic oil chamber 14 gradually returns to balance. Under the action of the reset spring 803, the long arc clamping plate 801 gradually returns to the initial position, and the sliding push rod 802 drives the hydraulic plug 16 to slide in the transfer chamber 15 in the opposite direction, preparing for the next straightening work.

[0069] In summary, the long arc straightening die achieves precise straightening of metal wires through the coordinated work of the straightening components and the hydraulic components, and can adapt to the processing needs of metal wires of different specifications and shapes.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A compact metal wire straightening shaft, comprising a wire inlet portion (1), a wire management portion (2), a connecting portion (6), a straightening portion (7) and a wire outlet portion (10), characterized in that: The wire inlet portion (1), the wire arrangement portion (2), the straightening portion and the wire outlet portion (10) are respectively provided with a wire inlet cavity (11), a wire arrangement cavity (13), a straightening cavity (9) and a wire outlet cavity (17); the upper end of the wire arrangement portion (2) is also provided with a device cavity (3); a lubrication system (4) is installed in the device cavity (3); the lubrication system (4) is composed of a lubrication component, an oil delivery component, a lubrication power component and an oil delivery power component; The lubrication component is composed of elastic cotton (12) and a cam (407), and is used to wipe and lubricate the metal wire; The oil delivery assembly is composed of an oil storage barrel (408), an oil delivery pipe (409) and an oil inlet pipe (410), and is used to deliver lubricating oil to the elastic cotton (12); one end of the oil delivery pipe (409) is connected to the lower end of the oil storage barrel (409), and the other end is arranged on the elastic cotton (12); one end of the oil inlet pipe (410) is arranged at the lower end of the oil storage barrel (409), and the other end is connected to an external oil source; The lubrication power assembly is composed of a track rod (402), a sliding sleeve (403), an electric push rod (401) and a first connecting member (404), and is used to provide rotational force for the cam (407); the track rod (402) is fixed between the inner walls of the device cavity (3); a pair of sliding sleeves (403) are symmetrically slidably sleeved on the track rod (402); and the first connecting member (404) is fixed to the telescopic end of the electric push rod (401); The oil delivery power assembly is composed of a piston (414) and a bent rod (415), and is used to provide a driving force for the flow of lubricating oil. The piston (414) is sealingly and slidably connected between the inner wall of the oil storage barrel (408), and the bent rod (415) is fixedly connected between the first connecting member (404) and the piston (414); The first connecting member (404) is connected to the sliding sleeve (403) via a first transmission mechanism, and the sliding sleeve (403) is transmission-connected to the cam (407) via a second transmission mechanism; A long arc straightening mould (8) is installed in the straightening cavity (9).

2. A compact metal wire straightening shaft according to claim 1, characterized in that: The first transmission mechanism comprises a pair of second connecting members (405) and a connecting rod (406); the pair of second connecting members (405) are respectively fixed on a pair of sliding sleeves (403); and both ends of the pair of connecting rods (406) are respectively rotatably connected to the first connecting member (404) and the second connecting member (405).

3. A compact metal wire straightening shaft according to claim 1, characterized in that: The second transmission mechanism comprises a rack (411), a first gear (412) and a second gear (413); the rack (411) is fixedly arranged at the lower end of the sliding sleeve (403); the first gear (412) and the second gear (413) are both rotatably connected to the inner wall of the device cavity (3); the first gear (412) is respectively meshed with the rack (411) and the second gear (413); and the second gear (413) is fixedly connected to the cam (407).

4. A compact metal wire straightening shaft according to claim 1, characterized in that: The oil inlet pipe (410) is installed with a one-way valve that only allows lubricating oil to flow from the external oil source into the oil storage barrel (408), and the oil delivery pipe (409) is installed with a one-way valve that only allows lubricating oil to flow from the oil storage barrel (408) to the elastic cotton (12).

5. A compact metal wire straightening shaft according to claim 1, characterized in that: A plurality of copper heat dissipation fins (6) are fixedly connected to the side walls of a pair of sliding sleeves (403); the heat dissipation fins (6) extend through the outside of the straightening shaft, and the heat dissipation fins (6) can slide and move along with the sliding sleeves (403).

6. A long arc straightening die according to any one of claims 1 to 5, comprising a straightening component and a hydraulic component, characterized in that: The straightening assembly is composed of a plurality of long arc-shaped clamping plates (801), a plurality of sliding push rods (802) and a plurality of return springs (803), and is used to clamp the metal wire to provide a correction force. The plurality of arc-shaped clamping plates (801) are distributed in a ring shape in the straightening cavity (9), the plurality of sliding push rods (802) are evenly distributed on the outer wall of the long arc-shaped clamping plates (801), and the plurality of return springs (803) are sleeved on the outside of the sliding push rods (802) and elastically connected between the long arc-shaped clamping plates (801) and the inner wall of the straightening cavity; The hydraulic assembly is composed of a hydraulic oil cavity (14), a transfer cavity (15) and a hydraulic plug (16); the hydraulic oil cavity (14) is opened in the connecting portion (5) and stores hydraulic oil; a plurality of the transfer cavities are arranged in a ring shape in the straightening portion (7); the hydraulic plug (16) is sealingly slidably connected in the transfer cavity (15) and is fixedly connected to the sliding push rod (802); the hydraulic plug (16) is controlled by a pump mechanism to produce a movement.

7. The long arc straightening die according to claim 6, characterized in that: The pump mechanism comprises an oil pump (19) and an oil guide pipe (18); the oil pump (19) is fixedly mounted on a side wall of the connection portion (5) and is in communication with the hydraulic oil cavity (14); one end of the oil guide pipe (18) is in communication with the oil pump (19), and the other end is in communication with the transfer cavity (15).

8. The long arc straightening die according to claim 6, characterized in that: The hydraulic oil cavity (14) has a ring-shaped cross section, is arranged to bypass the straightening cavity (9), and has an oil nozzle arranged on the surface of the connecting portion.

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