Multi-head wire drawing machine based on wire and cable soft-state stranded wire production

Abstract

The invention relates to the technical field of wire drawing machines, and discloses a multi-head wire drawing machine based on wire and cable soft-state stranded wire production, the multi-head wire drawing machine comprises a support plate, the upper surface of the support plate is fixedly connected with an eight-head wire drawing machine, and the left side surface of the eight-head wire drawing machine is fixedly connected with a key controller; a stress relieving mechanism and a cooling assisting mechanism are arranged above the supporting plate. According to the multi-head wire drawing machine based on electric wire and cable soft-state stranded wire production, the induction heating coil is arranged and can heat a copper wire fed into the pretreatment box at proper power after being electrified so as to eliminate prestress on the copper wire rod; the first heat-resistant wire guide wheel, the second heat-resistant wire guide wheel and the third heat-resistant wire guide wheel can rotate around the first limiting support rod, the second limiting support rod and the third limiting support rod respectively; and the pre-stress of the copper wire can be further eliminated after the heated copper wire respectively bypasses the first heat-resistant wire guide wheel, the second heat-resistant wire guide wheel and the third heat-resistant wire guide wheel.

Description

Technical Field

[0001] This invention relates to the field of wire drawing machine technology, specifically a multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables. Background Technology

[0002] A wire drawing machine is a device that processes metal billets into specific wires by drawing them. It can be divided into single-head and multi-head types. A multi-head wire drawing machine can draw multiple wires at the same time. In the production of soft stranded wires for electric wires and cables, when it is necessary to prepare multiple single wires of the same specification at the same time (to meet the stranding requirements), to carry out mass production to improve efficiency, and to have strict requirements for the consistency of the soft state of the single wires, a multi-head wire drawing machine is needed. It can ensure the consistency of multiple single wires and is suitable for the needs of large-scale production.

[0003] While existing multi-head wire drawing machines can simultaneously draw multiple copper wires used for wire and cable production to meet different wire requirements, most of them do not perform pre-stress relief treatment on the copper wires. The lack of a copper wire pre-stress relief structure makes the copper wires prone to surface quality defects or even breakage during subsequent wire drawing due to uneven distribution of pre-stress. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-head wire drawing machine based on the production of soft stranded wires and cables, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-head wire drawing machine based on the production of soft stranded wires of electric wires and cables, including a support plate, an eight-head wire drawing machine fixedly connected to the upper surface of the support plate, a button controller fixedly connected to the left side of the eight-head wire drawing machine, and a stress relief mechanism and a cooling auxiliary mechanism respectively provided above the support plate.

[0006] The stress relief mechanism includes eight pretreatment boxes. The bottom surface of each pretreatment box is fixedly connected to two support columns together with the upper surface of the support plate. The inner sidewall of each pretreatment box is fixedly connected to a ceramic frame, a first limiting support rod, a second limiting support rod, and a third limiting support rod. The inner wall of each ceramic frame is fixedly connected to an induction heating coil. The inner wall of each first limiting support rod is rotatably connected to a first heat-resistant wire wheel. The inner wall of each second limiting support rod is rotatably connected to a second heat-resistant wire wheel. The inner wall of each third limiting support rod is rotatably connected to a third heat-resistant wire wheel.

[0007] Preferably, the cooling auxiliary mechanism includes eight supporting shells, the back of each supporting shell is in contact with the front of the pretreatment box, the inner wall of each supporting shell is threadedly connected to the inner wall of the pretreatment box with four fastening bolts, and a fan and an air guide are fixedly connected to the inner wall of each supporting shell respectively. The eight wire drawing machines, eight induction heating coils and eight fans are all electrically connected to the button controller through wires.

[0008] Preferably, the bottom surface of the support plate is fixedly connected to four support legs, and the bottom end of each support leg is fixedly connected to a support plate.

[0009] Preferably, two handle supports are fixedly connected to both the front and back of the support plate, and a pull rod is fixedly connected to the inner wall of each handle support.

[0010] Preferably, each of the handle supports is provided with a grip inside, and the inner wall of each grip is rotatably connected to the outer surface of the pull rod.

[0011] Preferably, a first connecting rod is fixedly connected to the inner sidewall of each pretreatment box, and a first support frame is fixedly connected to the left end of each first connecting rod.

[0012] Preferably, each of the first support frames has two first fixing rods fixedly connected to its inner wall, and each of the first fixing rods has a first wire feeding wheel rotatably connected to its outer surface.

[0013] Preferably, a second connecting rod is fixedly connected to the inner sidewall of each pretreatment box, and a second support frame is fixedly connected to the left end of each second connecting rod.

[0014] Preferably, each of the second support frames has two second fixing rods fixedly connected to its inner wall, and each of the second fixing rods has a second wire feeding wheel rotatably connected to its outer surface.

[0015] Preferably, each of the fastening bolts has a washer fitted on its outer surface, and the back of each washer is in contact with the outer surface of the supporting shell.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0017] First, this invention, by setting an induction heating coil, can heat the copper wire fed into the pretreatment box with appropriate power after being energized, thereby initially eliminating the uneven prestress on the copper wire. In addition, the first, second, and third heat-resistant guide wheels can rotate around the first, second, and third limiting support rods, respectively. After the heated copper wire passes around the first, second, and third heat-resistant guide wheels, the prestress of the copper wire is further eliminated. This multi-directional elimination of prestress in the copper wire ensures the effect of subsequent wire drawing by the eight-head wire drawing machine.

[0018] Secondly, by setting fastening bolts, the present invention can assemble the support shell at the outlet of each pretreatment box. Then, under the power of the fan and the exhaust of the air duct, the copper wire coming out of the outlet of the pretreatment box can be cooled, thereby fixing the metal structure of the metal wire, preventing stress rebound, greatly improving the stress relief effect of the stress relief mechanism, and avoiding the problem that the copper wire is prone to surface quality defects or even breakage due to uneven distribution of prestress during the subsequent wire drawing process due to the lack of copper wire prestress relief structure. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the multi-head wire drawing machine of the present invention;

[0020] Figure 2 This is a schematic diagram of the support plate of the present invention viewed from below;

[0021] Figure 3 This is a schematic diagram of the pretreatment box of the present invention;

[0022] Figure 4 This is a cross-sectional structural diagram of the pretreatment box of the present invention;

[0023] Figure 5 This is a cross-sectional structural diagram of the ceramic frame of the present invention;

[0024] Figure 6 This is a schematic diagram of the supporting shell structure of the present invention viewed from below.

[0025] The components include: 1. Support plate; 2. Eight-head wire drawing machine; 3. Button controller; 4. Stress relief mechanism; 401. Pretreatment box; 402. Support column; 403. Ceramic frame; 404. Induction heating coil; 405. First limiting support rod; 406. First heat-resistant wire wheel; 407. Second limiting support rod; 408. Second heat-resistant wire wheel; 409. Third limiting support rod; 410. Third heat-resistant wire wheel; 5. Cooling auxiliary mechanism; 501. Support shell; 502. Fastening bolt; 503. Fan; 504. Air guide tube; 6. Support leg; 7. Support plate; 8. Handle support; 9. Pull rod; 10. Grip; 11. First connecting rod; 12. First support frame; 13. First fixing rod; 14. First wire feeding wheel; 15. Second connecting rod; 16. Second support frame; 17. Second fixing rod; 18. Second wire feeding wheel; 19. Washer. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] Please see Figure 1-6 A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables includes a support plate 1. An eight-head wire drawing machine 2 is fixedly connected to the upper surface of the support plate 1. The eight-head wire drawing machine 2 is a mature existing technology and is a special equipment for the electric wire and cable industry for the simultaneous processing of multiple bare wires. Its upper opening facilitates the reasonable distribution and layout of the copper wires initially entering the eight-head wire drawing machine 2. Its core structure includes a main wire drawing motor, a speed-regulating wheel assembly, a wire drawing die base, and an oil spraying system. The transmission speed ratio is distributed through a gear transmission box. During operation, the metal wires are drawn thinner by the wire drawing die base, the speed-regulating wheel assembly controls the wire speed, and the oil spraying system provides lubrication and cooling. It can draw multiple metal wires simultaneously. The finished wire is drawn into the wire spool. Some models also integrate an annealing station to improve wire performance. The left side of the eight-head wire drawing machine 2 is fixedly connected to a button controller 3. The button controller 3 can be an MCU or an Arduino series. It is small in size, low in cost and low in power consumption, and is suitable for miniaturization and embedded applications. It can control multiple components through programming. It can be connected to the control terminal of each electrical component through digital output pins, and control the power of each component through analog output pins. Specific control logic and timing can be implemented by writing code. The support plate 1 is equipped with a stress relief mechanism 4 and a cooling auxiliary mechanism 5 respectively.

[0029] The stress relief mechanism 4 includes eight pretreatment boxes 401. The bottom surface of each pretreatment box 401 is fixedly connected to two support columns 402 along with the upper surface of the support plate 1. Each pretreatment box 401 has a ceramic frame 403, a first limiting support rod 405, a second limiting support rod 407, and a third limiting support rod 409 fixedly connected to its inner wall. An induction heating coil 404 is fixedly connected to the inner wall of each ceramic frame 403. A first heat-resistant guide wheel 406 is rotatably connected to the inner wall of each first limiting support rod 405. A second heat-resistant guide wheel 408 is rotatably connected to the inner wall of each second limiting support rod 407. A third heat-resistant guide wheel 410 is rotatably connected to the inner wall of each third limiting support rod 409. The first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410 can all be made of high-temperature resistant ceramic. The structure includes an opening on the pretreatment box 401 to facilitate the guidance and combing of the copper wire entering the pretreatment box 401. By setting an induction heating coil 404, the copper wire fed into the pretreatment box 401 can be heated with appropriate power after being energized, thereby initially eliminating the uneven prestress on the copper wire. In addition, the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410 can rotate around the first limiting support rod 405, the second limiting support rod 407, and the third limiting support rod 409, respectively. After the heated copper wire passes around the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410, the prestress of the copper wire can be further eliminated. This multi-directional elimination of the prestress of the copper wire ensures the effect of its subsequent wire drawing by the eight-head wire drawing machine 2.

[0030] Four support legs 6 are fixedly connected to the bottom surface of the support plate 1. Each support leg 6 is fixedly connected to a support plate 7 at its bottom end. By setting the support legs 6, the structure on the support plate 1 can be raised, and the bottom of the support plate 1 can be prevented from being worn. It can also provide a structure for easy handling of the support plate 1 and the structure above it. By setting the support plate 7, the support area and support stability at the bottom end of the support leg 6 can be increased.

[0031] Two handle supports 8 are fixedly connected to both the front and back of the support plate 1. Each handle support 8 has a pull rod 9 fixedly connected to its inner wall. By setting the pull rod 9, a rotation base surface can be provided for the hand grip structure inside the handle support 8. By setting the handle support 8 and the pull rod 9, the entire equipment can be lifted and moved together in conjunction with the aforementioned hand grip structure and the external lifting structure.

[0032] Each handle support 8 is equipped with a handle 10 inside. The inner wall of each handle 10 is rotatably connected to the outer surface of the pull rod 9. By setting the handle 10, it can rotate around the outer surface of the pull rod 9 inside the handle support 8. Thus, the handle 10, in conjunction with the external lifting structure, facilitates the lifting and transportation of the entire equipment.

[0033] Each pretreatment box 401 has a first connecting rod 11 fixedly connected to its inner side wall, and a first support frame 12 fixedly connected to the left end of each first connecting rod 11. By setting the first connecting rod 11, the pretreatment box 401 and the first support frame 12 can be connected. By setting the first support frame 12, it can cooperate with other guiding structures to reasonably guide the copper wire entering the pretreatment box 401.

[0034] Two first fixing rods 13 are fixedly connected to the inner wall of each first support frame 12. A first wire feeding wheel 14 is rotatably connected to the outer surface of each first fixing rod 13. By setting the first fixing rod 13, a rotation base surface can be provided for the first wire feeding wheel 14, thereby facilitating the reasonable guidance of the copper wire entering the pretreatment box 401.

[0035] Each pretreatment box 401 has a second connecting rod 15 fixedly connected to its inner side wall, and a second support frame 16 fixedly connected to the left end of each second connecting rod 15. By setting the second connecting rod 15, the pretreatment box 401 and the second support frame 16 can be connected. By setting the second support frame 16, it can cooperate with other guiding structures to reasonably guide the copper wires that are about to leave the pretreatment box 401 into the interior of the eight-head wire drawing machine 2.

[0036] Two second fixing rods 17 are fixedly connected to the inner wall of each second support frame 16. A second wire feeding wheel 18 is rotatably connected to the outer surface of each second fixing rod 17. By setting the second fixing rod 17, a rotation base surface can be provided to the outer surface of the second wire feeding wheel 18. By setting the second wire feeding wheel 18, the copper wire that is about to leave the pretreatment box 401 can be reasonably guided into the interior of the eight-head wire drawing machine 2.

[0037] The specific implementation method of this embodiment is as follows: First, the copper wire initially entering the pretreatment box 401 is threaded into the two first feeding rollers 14. Utilizing the opening on the pretreatment box 401, the copper wire is first passed through the induction heating coil 404, then wound in an S-shape around the first heat-resistant wire roller 406, the second heat-resistant wire roller 408, and the third heat-resistant wire roller 410. Finally, after passing between the two second feeding rollers 18, it is fed into the corresponding inlet of the eight-head wire drawing machine 2. During the wire drawing process of the eight-head wire drawing machine 2, the induction heating coil 404, after being energized, heats the copper wire fed into the pretreatment box 401 with appropriate power, thereby initially eliminating the uneven prestress on the copper wire. In addition, The first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410 rotate around the first limiting support rod 405, the second limiting support rod 407, and the third limiting support rod 409, respectively. As a result, the heated copper wire passes around the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410, which further eliminates the prestress of the copper wire. This multi-directional elimination of the prestress of the copper wire ensures the effect of its subsequent wire drawing by the eight-head wire drawing machine 2. It avoids the problem of uneven distribution of prestress during the subsequent wire drawing process, which can easily lead to surface quality defects or even wire breakage due to the lack of a copper wire prestress elimination structure.

[0038] Example 2

[0039] Please see Figure 1-6 The cooling auxiliary mechanism 5 includes eight support shells 501. The back of each support shell 501 is in contact with the front of the pretreatment box 401. The inner wall of each support shell 501 is threadedly connected to the inner wall of the pretreatment box 401 with four fastening bolts 502. The inner wall of each support shell 501 is fixedly connected with a fan 503 and an air guide 504. The eight wire drawing machine 2, the eight induction heating coils 404 and the eight fans 503 are all electrically connected to the button controller 3 through wires. By setting the fastening bolts 502, the support shells 501 can be assembled at the outlet of each pretreatment box 401. Then, under the blowing of the fan 503 and the exhaust of the air guide 504, the copper wire coming out of the outlet of the pretreatment box 401 can be cooled, thereby fixing the metal structure of the metal wire, preventing stress rebound, and greatly improving the stress relief effect of the stress relief mechanism 4.

[0040] Each fastening bolt 502 has a washer 19 fitted on its outer surface. The back of each washer 19 is in contact with the outer surface of the support shell 501. By setting the washer 19, it can be placed between the support shell 501 and the fastening bolt 502 and increase the contact area between the two, thereby increasing the fastening effect of the fastening bolt 502.

[0041] The specific implementation method of this embodiment is as follows: First, the support shell 501 is assembled at the outlet of each pretreatment box 401 using fastening bolts 502. Then, under the power of the fan 503 and the exhaust of the air duct 504, the copper wire coming out of the outlet of the pretreatment box 401 is cooled down, thereby fixing the metal structure of the metal wire, preventing stress rebound, and greatly improving the stress relief effect of the stress relief mechanism 4.

[0042] Example 3

[0043] Please see Figure 1-6 The specific implementation method of this embodiment is as follows: First, the support shell 501 is assembled at the outlet of each pretreatment box 401 using fastening bolts 502. Then, the copper wire initially entering the pretreatment box 401 is threaded into the two first feeding rollers 14. Using the opening on the pretreatment box 401, the copper wire is first passed through the induction heating coil 404, and then wound in an S-shape around the first heat-resistant wire roller 406, the second heat-resistant wire roller 408, and the third heat-resistant wire roller 410. Finally, it is fed into the corresponding inlet of the eight-head wire drawing machine 2 after passing between the two second feeding rollers 18. During the wire drawing process of the eight-head wire drawing machine 2, the induction heating coil 404 heats the copper wire fed into the pretreatment box 401 with appropriate power after being energized, thereby initially eliminating the uneven prestress on the copper wire. Furthermore, the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410 rotate around the first limiting support rod 405, the second limiting support rod 407, and the third limiting support rod 409, respectively. As a result, the heated copper wire passes around the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410, further eliminating the pre-stress of the copper wire. This multi-directional elimination of the pre-stress of the copper wire ensures the subsequent wire drawing effect of the eight-head wire drawing machine 2. In addition, with the fan 503 blowing air and the air duct 504 exhausting air, the copper wire coming out of the pre-treatment box 401 outlet is cooled, thereby fixing the metal structure of the metal wire, preventing stress rebound, and greatly improving the stress elimination effect of the stress elimination mechanism 4.

[0044] The working principle of this invention is as follows: First, the supporting shell 501 is assembled at the outlet of each pretreatment box 401 using fastening bolts 502. Then, the copper wire initially entering the pretreatment box 401 is threaded into the two first feeding rollers 14. Using the opening on the pretreatment box 401, the copper wire first passes through the induction heating coil 404, and then winds in an S-shape around the first heat-resistant wire roller 406, the second heat-resistant wire roller 408, and the third heat-resistant wire roller 410. Finally, it is fed into the corresponding inlet of the eight-head wire drawing machine 2 after passing between the two second feeding rollers 18. During the wire drawing process of the eight-head wire drawing machine 2, the induction heating coil 404 heats the copper wire fed into the pretreatment box 401 with appropriate power after being energized, thereby initially eliminating the uneven prestress on the copper wire. In addition, the first heat-resistant wire roller 406, the second heat-resistant wire roller 408, and the third heat-resistant wire roller 410 respectively surround the first limit. The support rod 405, the second limiting support rod 407, and the third limiting support rod 409 rotate, causing the heated copper wire to pass over the first heat-resistant guide wheel 406, the second heat-resistant guide wheel 408, and the third heat-resistant guide wheel 410 respectively, further eliminating the prestress of the copper wire. This multi-directional elimination of prestress in the copper wire ensures the subsequent drawing effect of the eight-head wire drawing machine 2. Furthermore, with the fan 503 blowing air and the air duct 504 exhausting air, the copper wire coming out of the pretreatment box 401 outlet is cooled, thereby fixing the metal structure of the metal wire, preventing stress rebound, and greatly improving the stress elimination effect of the stress elimination mechanism 4. The entire design of the multi-head wire drawing machine based on the production of soft stranded wires effectively solves the problem that the lack of a copper wire prestress elimination structure can easily lead to surface quality defects or even wire breakage in the subsequent wire drawing process due to uneven distribution of prestress.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables, comprising a support plate (1), characterized in that: An eight-head wire drawing machine (2) is fixedly connected to the upper surface of the support plate (1), and a button controller (3) is fixedly connected to the left side of the eight-head wire drawing machine (2). A stress relief mechanism (4) and a cooling auxiliary mechanism (5) are respectively provided above the support plate (1). The stress relief mechanism (4) includes eight pretreatment boxes (401). The bottom surface of each pretreatment box (401) is fixedly connected to two support columns (402) together with the upper surface of the support plate (1). The inner sidewall of each pretreatment box (401) is fixedly connected to a ceramic frame (403), a first limiting support rod (405), a second limiting support rod (407), and a third limiting support rod (409). The inner wall of each ceramic frame (403) is fixedly connected to an induction heating coil (404). The inner wall of each first limiting support rod (405) is rotatably connected to a first heat-resistant wire wheel (406). The inner wall of each second limiting support rod (407) is rotatably connected to a second heat-resistant wire wheel (408). The inner wall of each third limiting support rod (409) is rotatably connected to a third heat-resistant wire wheel (410).

2. A multi-head wire drawing machine based on the production of flexible stranded wires for electric wires and cables according to claim 1, characterized in that: The cooling auxiliary mechanism (5) includes eight support shells (501), the back of each support shell (501) is in contact with the front of the pretreatment box (401), the inner wall of each support shell (501) is threadedly connected to the inner wall of the pretreatment box (401) with four fastening bolts (502), and the inner wall of each support shell (501) is fixedly connected with a fan (503) and an air guide tube (504). The eight wire drawing machine (2), the eight induction heating coils (404) and the eight fans (503) are all electrically connected to the button controller (3) through wires.

3. A multi-head wire drawing machine based on the production of flexible stranded wires for electric wires and cables according to claim 1, characterized in that: The bottom surface of the support plate (1) is fixedly connected to four support legs (6), and the bottom end of each support leg (6) is fixedly connected to a support plate (7).

4. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables according to claim 1, characterized in that: Two handle supports (8) are fixedly connected to the front and back of the support plate (1), and a pull rod (9) is fixedly connected to the inner wall of each handle support (8).

5. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables according to claim 4, characterized in that: Each of the handle supports (8) is provided with a grip (10) inside, and the inner wall of each grip (10) is rotatably connected to the outer surface of the pull rod (9).

6. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables according to claim 1, characterized in that: Each of the pretreatment boxes (401) has a first connecting rod (11) fixedly connected to its inner sidewall, and a first support frame (12) is fixedly connected to the left end of each of the first connecting rods (11).

7. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables according to claim 6, characterized in that: Two first fixing rods (13) are fixedly connected to the inner wall of each first support frame (12), and a first wire feeding wheel (14) is rotatably connected to the outer surface of each first fixing rod (13).

8. A multi-head wire drawing machine based on the production of flexible stranded wires for electric wires and cables according to claim 1, characterized in that: Each of the pretreatment boxes (401) has a second connecting rod (15) fixedly connected to its inner sidewall, and a second support frame (16) is fixedly connected to the left end of each of the second connecting rods (15).

9. A multi-head wire drawing machine based on the production of soft stranded wires for electric wires and cables according to claim 8, characterized in that: Two second fixing rods (17) are fixedly connected to the inner wall of each second support frame (16), and a second wire feeding wheel (18) is rotatably connected to the outer surface of each second fixing rod (17).

10. A multi-head wire drawing machine based on the production of flexible stranded wires for electric wires and cables according to claim 1, characterized in that: Each of the fastening bolts (502) has a washer (19) fitted on its outer surface, and the back of each washer (19) is in contact with the outer surface of the support shell (501).

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