Multi-head wire drawing machine and working method thereof

Abstract

The present invention relates to the technical field of wire drawing machines, and in particular to a multi-head wire drawing machine and a working method thereof, wherein the wire drawing machine includes a fixed frame fixedly arranged on the ground; a driving shaft rotating on the fixed frame; a driven shaft rotating on the fixed frame; a wire drawing die arranged between the driving shaft and the driven shaft; a first motor driving the driving shaft to rotate; a transmission shaft rotating along its own axis and capable of sliding up and down on the fixed frame; a first driving gear sleeved on the driving shaft; a first driven gear sleeved on the transmission shaft and meshing with the first driving gear; a second driving gear sleeved on the transmission shaft; a second driven gear sleeved on the driven shaft and meshing with the second driving gear; a gear ratio of the first driving gear to the first driven gear is equal to a gear ratio of the second driving gear to the second driven gear, and is equal to a diameter ratio of the metal wire after processing to the metal wire before processing. The present invention can effectively solve the problem that existing equipment easily causes a single metal wire to become loose or break.

Description

Technical Field

[0001] The present invention relates to the technical field of wire drawing machines, and in particular to a multi-head wire drawing machine and a working method thereof. Background Art

[0002] A wire drawing machine is a mechanical device used to stretch metal materials (such as steel, copper, and aluminum) to reduce their diameter and length. A multi-head wire drawing machine is a type of wire drawing machine that can process multiple metal materials simultaneously.

[0003] The length of the metal material changes significantly before and after drawing, so the speed ratio before and after drawing needs to be precisely controlled during the drawing process. Since this ratio is the square relationship between the diameter of the material after drawing and the diameter of the material before drawing, it is easy to involve infinite repeating decimals. Therefore, the speed ratio of the rotating shaft winding the material before and after drawing can usually only be close to the aforementioned ratio. This slight difference will continue to accumulate as the processing progresses, eventually causing the metal material to become loose or break. For multi-head wire drawing machines, if a problem occurs with one metal wire, the entire machine needs to be shut down, so the processing of other metal wires must be stopped and reinstalled, which seriously affects processing efficiency. Summary of the Invention

[0004] The present invention provides a multi-head wire drawing machine and a working method thereof, which can effectively solve the problem in the background art that the existing wire drawing machine cannot accurately control the proportional relationship of the rotating shaft speed, resulting in the single metal wire being easily loosened or broken.

[0005] The present invention provides a multi-head wire drawing machine, comprising:

[0006] A fixed frame, fixedly set on the ground;

[0007] The driving shaft rotates on the fixed frame;

[0008] The driven shaft rotates on the fixed frame;

[0009] The wire drawing die is set between the driving shaft and the driven shaft and is used to process the metal wire;

[0010] The first motor drives the driving shaft to rotate;

[0011] The transmission shaft is set between the driving shaft and the driven shaft, rotates along its own axis, and can slide up and down on the fixed frame;

[0012] The first driving gear is sleeved on the driving shaft and rotates synchronously with the driving shaft;

[0013] The first driven gear is sleeved on the transmission shaft, rotates synchronously with the transmission shaft, and meshes with the first driving gear;

[0014] The second driving gear is sleeved on the transmission shaft and rotates synchronously with the transmission shaft;

[0015] The second driven gear is sleeved on the driven shaft, rotates synchronously with the driven shaft, and meshes with the second driving gear;

[0016] The gear ratio of the first driving gear and the first driven gear is equal to the gear ratio of the second driving gear and the second driven gear, and is equal to the diameter ratio of the metal wire after processing and before processing.

[0017] Furthermore, a first limiting sleeve and a second limiting sleeve are respectively provided on the driving shaft and the driven shaft, and a plurality of limiting ring grooves are provided on the first limiting sleeve and the second limiting sleeve.

[0018] Furthermore, waterproof covers are provided at both ends of the first limiting sleeve and the second limiting sleeve, and outer sides of the waterproof covers are bent in a direction away from the metal wire.

[0019] Furthermore, it also includes:

[0020] An auxiliary shaft rotates on a fixed frame and extends into the driven shaft;

[0021] The second motor drives the auxiliary shaft to rotate;

[0022] A sliding sleeve is sleeved on the auxiliary shaft and rotates synchronously with the auxiliary shaft;

[0023] The spring is sleeved on the auxiliary shaft, and its two ends respectively abut against the auxiliary shaft and the sliding sleeve;

[0024] A first gear ring is circumferentially provided on an end surface of the sliding sleeve away from the spring;

[0025] A second gear ring is arranged inside the driven shaft and meshes with the first gear ring.

[0026] Furthermore, a plurality of first force transmission teeth are arranged in the first gear ring, and the side surfaces of the first force transmission teeth are first inclined surfaces; a plurality of second force transmission teeth are arranged in the second gear ring, and the side surfaces of the second force transmission teeth are second inclined surfaces that fit the first inclined surfaces.

[0027] Furthermore, a synchronously rotating replacement sleeve is provided in the driven shaft, and the second gear ring is provided on the replacement sleeve.

[0028] Furthermore, a mounting groove extending along the axis is provided on the inner wall of the driven shaft; and a plurality of mounting blocks extending along the axis are provided on the replacement sleeve, and the mounting blocks extend into the mounting groove.

[0029] Furthermore, the circumferential width of the mounting block is smaller than the circumferential width of the mounting groove.

[0030] Furthermore, bearings are provided at both ends of the auxiliary shaft, and the outer side surfaces of the bearings abut against the inner wall of the driven shaft.

[0031] The present invention also provides a multi-head wire drawing machine operating method, which is used for the above-mentioned multi-head wire drawing machine, comprising:

[0032] S10: The transmission shaft moves upward, so that the first driving gear and the first driven gear are separated and the second driving gear and the second driven gear are separated;

[0033] S20: The ends of each metal wire are hammered or ground into thin pieces, and then passed through a wire drawing die and wound around the driving shaft and the driven shaft;

[0034] S30: Set the speed n1 and calculate n1 (D1 / D2) 2 The value is rounded up and recorded as n2; D1 is the diameter of the metal wire after processing, and D2 is the diameter of the metal wire before processing;

[0035] S40: The transmission shaft moves downward, meshing the first driving gear with the first driven gear and the second driving gear with the second driven gear, and rotating the driving shaft at a speed of n1 and the auxiliary shaft at a speed of n2 to achieve wire processing.

[0036] The technical solution of the present invention can achieve the following technical effects:

[0037] This multi-head wire drawing machine is equipped with two sets of transmission gears to ensure that the speed ratio of the driving shaft and the driven shaft is the same as the theoretical optimal value from a purely mechanical structure, thereby effectively ensuring the drawing effect of the metal wire and preventing the metal wire from becoming loose or breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Schematic diagram of the overall structure of the multi-head wire drawing machine in the present invention;

[0040] Figure 2 It is a structural schematic diagram of the processing part of the multi-head wire drawing machine of the present invention;

[0041] Figure 3 It is a rear view of the processing part of the multi-head wire drawing machine of the present invention;

[0042] Figure 4 A top view of the driven shaft of the present invention;

[0043] Figure 5 For the present invention Figure 4 A sectional view of the part;

[0044] Figure 6 For the present invention Figure 4 Cross-sectional view at point B;

[0045] Figure 7 Schematic diagram of the structure of the auxiliary shaft in the present invention;

[0046] Figure 8 This is a diagram showing the components of the auxiliary shaft of the present invention;

[0047] Figure 9 is a cross-sectional view of the driven shaft in the present invention;

[0048] Figure numerals: 1, fixing frame; 2, driving shaft; 3, driven shaft; 3a, second transmission tooth; 3b, second inclined surface; 3c, replacement sleeve; 3d, mounting groove; 3e, mounting block; 4, drawing die; 5, transmission shaft; 6, first driving gear; 7, first driven gear; 8, second driving gear; 9, second driven gear; 10, waterproof cover; 11, auxiliary shaft; 12, sliding sleeve; 12a, first transmission tooth; 12b, first inclined surface; 13, spring. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0050] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] The present invention relates to a multi-head wire drawing machine, such as Figures 1 to 9 As shown, including:

[0053] A fixed frame 1 is fixed on the ground and is used to carry other components of the multi-head wire drawing machine;

[0054] The driving shaft 2 is mounted on the fixed frame 1 and rotates along itself;

[0055] The driven shaft 3 is mounted on the fixed frame 1 and rotates along the driven shaft 3; the outer diameter of the driven shaft 3 is the same as the outer diameter of the driving shaft 2;

[0056] The wire drawing die 4 is arranged between the driving shaft 2 and the driven shaft 3. A detachable and replaceable die core is provided in the wire drawing die 4. A tapered through hole is provided at the center of the die core, which can be used to process the metal wire into the required diameter. After the metal wire passes through the through hole, it will be squeezed into the diameter of the through hole outlet end;

[0057] The first motor drives the driving shaft 2 to rotate;

[0058] The transmission shaft 5 is arranged between the driving shaft 2 and the driven shaft 3. The transmission shaft 5 rotates along its own axis. The end of the transmission shaft 5 is mounted on a slider that can slide up and down on the fixed frame 1, so that the transmission shaft 5 can slide up and down on the fixed frame 1 while being able to rotate;

[0059] The first driving gear 6 is sleeved on the driving shaft 2 and connected to the driving shaft 2 by a key connection so that it can rotate synchronously with the driving shaft 2;

[0060] The first driven gear 7 is sleeved on the transmission shaft 5 and connected to the transmission shaft 5 by a key connection so that it can rotate synchronously with the transmission shaft 5, and when working, the first driven gear 7 is meshed with the first driving gear 6;

[0061] The second driving gear 8 is sleeved on the transmission shaft 5 and connected to the transmission shaft 5 by a key connection so that it can rotate synchronously with the transmission shaft 5;

[0062] The second driven gear 9 is sleeved on the driven shaft 3 and connected to the driven shaft 3 by a key connection so that it can rotate synchronously with the driven shaft 3, and when working, the second driven gear 9 is meshed with the second driving gear 8;

[0063] The gear ratio of the first driving gear 6 and the first driven gear 7 is equal to the gear ratio of the second driving gear 8 and the second driven gear 9, and is equal to the diameter ratio of the metal wire after processing and before processing. Specifically, if the number of teeth of the first driving gear 6 is z1, the number of teeth of the first driven gear 7 is z2, the number of teeth of the second driving gear 8 is z3, the number of teeth of the second driven gear 9 is z4, the diameter of the metal wire after processing is D1, and the diameter of the metal wire before processing is D2, then z1 / z2=z3 / z4=D2 / D1.

[0064] The specific working principle of this multi-head wire drawing machine is as follows:

[0065] During processing, multiple metal wires are wound around the driving shaft 2 and the driven shaft 3, and the metal wires are passed through the wire drawing die 4. The first motor drives the driving shaft 2 to rotate and pull the metal wires, so that the metal wires continuously pass through the wire drawing die 4 to reduce their diameter, thereby realizing the wire drawing processing of the metal wires.

[0066] When the wire is processed, its diameter will decrease from D2 to D1. If the rotation speed of the driving shaft 2 with a radius of R is N1, then the speed of the wire is equal to the linear velocity of the outer side of the driving shaft 2 2πR1·N1. In unit time t, the driving shaft 2 will transport a volume V1 = the cross-sectional area of the wire · the length transported = [(π·D1 2 ) / 4]·(2πR·N1·t); Similarly, if the driven shaft 3 with the same radius R has a rotation speed of N2, then in unit time t, the driven shaft 3 will transport a volume V2=[(π·D2 2 ) / 4]·(2πR·N2·t). In a wire drawing machine, the volume of wire carried by the driving shaft 2 and the driven shaft 3 should be the same to ensure that the wire is always in a moderately tight state, that is, V1=V2. After simplification, the theoretical speed ratio of the driving shaft 2 and the driven shaft 3 can be obtained as N1 / N2=(D2 / D1). 2 In actual operation, it is difficult to control the speed ratio of the driving shaft 2 and the driven shaft 3 to just reach (D2 / D1). 2 , such as processing a metal wire from 1mm to 0.7mm.

[0067] This multi-head wire drawing machine is equipped with two sets of transmission gears. When the first driving gear 6 rotates 1 circle, the first driven gear 7 will rotate z1 / z2 circles; when the second driving gear 8 rotates 1 circle, the second driven gear 9 will rotate z3 / z4 circles. After combining them, when the first driving gear 6 rotates 1 circle, the second driven gear 9 will rotate (z1 / z2)·(z3 / z4) circles. Since z1 / z2=z3 / z4=D2 / D1, the speed ratio of the first driving gear 6 and the second driven gear 9 is (D2 / D1). 2 , thereby ensuring from a purely mechanical structure that the speed ratio of the driving shaft 2 and the driven shaft 3 is the same as the theoretical optimal value, thereby effectively ensuring the drawing effect of the metal wire and preventing the metal wire from becoming loose or breaking.

[0068] When the wire drawing machine is working, the metal wire before processing is wound on the driven shaft 3, and the metal wire after processing is wound on the driving shaft 2, so that the power of the first motor can be directly used to pull the metal wire forward to ensure the processing of the metal wire; at the same time, since the speed of each shaft wrapped with metal wire increases successively in the forward direction of the metal wire, the driving shaft 2 with the fastest speed is connected to the motor, then a structure in which high speed drives low speed (or a structure in which a small gear drives a large gear) can be formed in the transmission. This transmission method can better transmit the torque generated by the first motor and ensure the reliability of the overall operation.

[0069] The liftable transmission shaft 5 can disconnect the transmission between the driving shaft 2 and the driven shaft 3 when a person winds the wire, so that the driving shaft 2 and the driven shaft 3 can rotate independently, thereby facilitating operation by the person.

[0070] The number of teeth and module of the first driving gear 6 and the second driving gear 8 should be the same, and the number of teeth and module of the first driven gear 7 and the second driven gear 9 should be the same, so that two mirror image gear combination structures can be formed, such as Figure 3 As shown, the center distance from the first driving gear 6 to the first driven gear 7 is equal to the center distance from the second driving gear 8 to the second driven gear 9. Then, when the processing size requirement of the metal wire changes, the first driving gear 6, the first driven gear 7, the second driving gear 8 and the second driven gear 9 must also be replaced with the corresponding number of teeth and module. At this time, thanks to the aforementioned two mirrored gear combination structures, it is only necessary to raise the transmission shaft 5 accordingly by a certain distance to simultaneously change the aforementioned two center distances, and the two center distances remain equal, so that the two gear combination structures can still maintain meshing. In this way, there is no need to move the driving shaft 2 or the driven shaft 3, thereby making the overall structure of the equipment more simple and reliable.

[0071] Preferably, a first limiting sleeve and a second limiting sleeve are respectively provided on the driving shaft 2 and the driven shaft 3. The first limiting sleeve and the second limiting sleeve are respectively connected to the driving shaft 2 and the driven shaft 3 by a key to realize synchronous rotation. The first limiting sleeve and the second limiting sleeve are both provided with a plurality of limiting ring grooves. During processing, the metal wire is stuck in each limiting ring groove to prevent the metal wire from moving on the shaft. The width of the limiting ring groove and the diameter of the metal wire should match as much as possible to ensure the limiting effect on the metal wire. The above structure makes the first limiting sleeve and the second limiting sleeve replaceable. In this way, when processing metal wires of different diameters, they can be replaced with the corresponding first limiting sleeve and second limiting sleeve for adaptation.

[0072] A nozzle can be set above the driving shaft 2, the driven shaft 3 and the drawing die 4 to spray water or coolant. In order to prevent the coolant from entering the driving shaft 2 and the driven shaft 3 and affecting the lubrication of the bearings, it is preferred to provide a waterproof cover 10 at both ends of the first limit sleeve and the second limit sleeve. The outer side of the waterproof cover 10 is bent in the direction away from the metal wire. After bending, it can be against the side of the fixing frame 1, thereby blocking the gap between the driving shaft 2 and the driven shaft 3.

[0073] In the above structure, since the first motor not only drives the driving shaft 2 to rotate itself, but also needs to drive the driven shaft 3 to rotate, it is easy to have insufficient torque. At this time, in order to ensure that the driven shaft 3 can rotate smoothly, it is still necessary to provide a certain amount of power to the driven shaft 3. The following structure is designed in this wire drawing machine to achieve this function, including:

[0074] The auxiliary shaft 11 is mounted on the fixed frame 1 and rotates along its own axis. The center of the driven shaft 3 is a long through hole, and the auxiliary shaft 11 extends into the driven shaft 3.

[0075] The second motor drives the auxiliary shaft 11 to rotate;

[0076] The sliding sleeve 12 is sleeved on the auxiliary shaft 11; the sliding sleeve 12 has a keyway opened in the axial direction, and the key provided on the auxiliary shaft 11 will extend into the keyway of the sliding sleeve 12, so that the sliding sleeve 12 can slide on the auxiliary shaft 11 while also being able to rotate synchronously with the auxiliary shaft 11;

[0077] The spring 13 is sleeved on the auxiliary shaft 11, and its two ends respectively abut against the end surface of the abutment disc protruding radially outward from the auxiliary shaft 11 and the sliding sleeve 12;

[0078] A first gear ring is circumferentially provided on one end surface of the sliding sleeve 12 away from the spring 13;

[0079] A second gear ring is provided inside the driven shaft 3 and meshes with the first gear ring.

[0080] The specific working principle of the above structure is as follows:

[0081] During operation, the speed of the driven shaft 3 driven by the aforementioned transmission structure is N2. Since the second motor cannot achieve the speed of N2, the speed of the auxiliary shaft 11 is set to the value n2 rounded up by N2 (it can be a rounding method such as rounding to the ones place or rounding to the tens place), that is, the auxiliary shaft 11 is slightly faster than the speed of the driven shaft 3.

[0082] In this way, the torque of the second motor will be transmitted to the driven shaft 3 through the auxiliary shaft 11, the sleeve 12, the first gear ring, and the second gear ring, thereby providing a certain amount of power for the rotation of the driven shaft 3. Of course, since the auxiliary shaft 11 rotates slightly faster than the driven shaft 3, the first gear ring will rotate slightly faster than the second gear ring during the rotation process. As the processing continues, the relative angle between the first and second gear rings will change. However, at this time, the spring 13 will still press the first gear ring toward the second gear ring to ensure that the torque can still be transmitted normally. After a period of time, when the angle of the first gear ring rotates to the point where one of its internal teeth aligns between two teeth in the second gear ring, the first and second gear rings can be re-engaged under the action of the spring 13. The first and second gear rings will repeat this process continuously, so that the torque of the second motor can be continuously transmitted to the driven shaft 3 throughout the entire processing process, thereby assisting the rotation of the driven shaft 3.

[0083] The tooth profiles of the first gear ring and the second gear ring can be traditional tooth profiles, but this traditional tooth profile usually has dense tooth distribution and small tooth profile. Therefore, when the two gear rings are misaligned, collisions will occur frequently, which is not conducive to the stable operation of the wire drawing machine. Therefore, in this wire drawing machine, the tooth profiles of the first gear ring and the second gear ring are enlarged, and the first gear ring contains multiple first force transmission teeth 12a, and the side of the first force transmission teeth 12a is a first inclined surface 12b; the second gear ring contains multiple second force transmission teeth 3a, and when working, the side of the second force transmission teeth 3a is a second inclined surface 3b that fits with the first inclined surface 12b, thereby greatly increasing the contact area between the first gear ring and the second gear ring, thereby improving the torque transmission effect.

[0084] There will be a large friction between the first gear ring and the second gear ring, so they are easy to wear and are parts that need to be replaced relatively frequently. Therefore, if the second gear ring is directly set on the driven shaft 3, then the entire driven shaft 3 needs to be replaced when it is replaced. This wire drawing machine sets the second gear ring on the replacement sleeve 3c by setting a synchronously rotating replacement sleeve 3c inside the driven shaft 3, thereby effectively saving maintenance costs. The specific installation structure of the replacement sleeve 3c and the driven shaft 3 is as follows: the inner wall of the driven shaft 3 is provided with a mounting groove 3d extending along the axis; the replacement sleeve 3c is provided with a plurality of mounting blocks 3e extending along the axis, and the mounting blocks 3e extend into the mounting groove 3d, so that the replacement sleeve 3c can rotate synchronously with the driven shaft 3. The mounting block 3e is longer than the mounting groove 3d, and a complete annular component is connected to each end of the mounting block 3e extending out of the mounting groove 3d, thereby increasing the overall structural strength of the replacement sleeve 3c.

[0085] Since the transmission shaft 5 needs to drive the first driven gear 7 and the second driving gear 8 to rise when installing the wire, and then lower it after installing the wire, when lowering, the angle between the driving shaft 2 and the transmission shaft 5 may not be able to just make the two pairs of gears mesh, so in this wire drawing machine, the circumferential width of the mounting block 3e is smaller than the circumferential width of the mounting groove 3d, such as Figure 6 As shown, there can be a slight relative rotation between the driven shaft 3 and the replacement sleeve 3c. When the gears are engaged, the driven shaft 3 can be slightly rotated to align the gears. After the second motor is started, the mounting block 3e will eventually stick to the mounting groove 3d as the replacement sleeve 3c rotates, thereby driving the driven shaft 3.

[0086] Since the auxiliary shaft 11 mainly plays the role of transmitting torque, in order to improve the stability of the auxiliary shaft 11 during rotation, it is preferably provided with bearings at both ends of the auxiliary shaft 11, and the outer side surface of the bearing is against the inner wall of the driven shaft 3, and the winding part of the metal wire is provided between the two bearings.

[0087] The present invention also relates to a multi-head wire drawing machine operating method, which is used for the above-mentioned multi-head wire drawing machine, comprising:

[0088] S10: The transmission shaft 5 moves upward, separating the first driving gear 6 and the first driven gear 7 and the second driving gear 8 and the second driven gear 9, so that the driving shaft 2 and the transmission shaft 5 can rotate independently;

[0089] S20: Each end of the metal wire is hammered or ground, and then passed through the wire drawing die 4 and wound around the driving shaft 2 and the driven shaft 3, so that the moving direction of the metal wire passes through the transmission shaft 5, the wire drawing die 4 and the driving shaft 2 in sequence; during the winding process, it is ensured that the metal wire is wound around the driving shaft 2 and the driven shaft 3 for at least one circle;

[0090] S30: Set the speed n1 and calculate n1 (D1 / D2) 2 The value is rounded up and recorded as n2; D1 is the diameter of the metal wire after processing, and D2 is the diameter of the metal wire before processing;

[0091] S40: The transmission shaft 5 moves downward, so that the first driving gear 6 and the first driven gear 7 are meshed and the second driving gear 8 and the second driven gear 9 are meshed, and the driving shaft 2 rotates at a speed of n1 and the auxiliary shaft 11 rotates at a speed of n2 to achieve wire processing.

[0092] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-head wire drawing machine, characterized in that: include: A fixed frame (1) is fixedly arranged on the ground; A driving shaft (2) rotates on the fixed frame (1); A driven shaft (3) rotates on the fixed frame (1); A wire drawing die (4) is arranged between the driving shaft (2) and the driven shaft (3) and is used for processing metal wire; A first motor drives the driving shaft (2) to rotate; A transmission shaft (5) is arranged between the driving shaft (2) and the driven shaft (3), rotates along its own axis, and can slide up and down on the fixing frame (1); A first driving gear (6) is sleeved on the driving shaft (2) and rotates synchronously with the driving shaft (2); A first driven gear (7) is sleeved on the transmission shaft (5), rotates synchronously with the transmission shaft (5), and meshes with the first driving gear (6); A second driving gear (8) is sleeved on the transmission shaft (5) and rotates synchronously with the transmission shaft (5); A second driven gear (9) is sleeved on the driven shaft (3), rotates synchronously with the driven shaft (3), and meshes with the second driving gear (8); The gear ratio of the first driving gear (6) to the first driven gear (7) is equal to the gear ratio of the second driving gear (8) to the second driven gear (9), and is equal to the diameter ratio of the metal wire after processing and before processing.

2. The multi-head wire drawing machine according to claim 1, characterized in that: A first limiting sleeve is provided on the driving shaft (2), and a second limiting sleeve is provided on the driven shaft (3); and a plurality of limiting ring grooves are provided on both the first limiting sleeve and the second limiting sleeve.

3. The multi-head wire drawing machine according to claim 2, characterized in that: Waterproof covers (10) are provided at both ends of the first limiting sleeve and the second limiting sleeve, and the outer sides of the waterproof covers (10) are bent in a direction away from the metal wire.

4. The multi-head wire drawing machine according to claim 1, characterized in that: Also includes: An auxiliary shaft (11) rotates on the fixed frame (1) and extends into the driven shaft (3); a second motor driving the auxiliary shaft (11) to rotate; A sliding sleeve (12) is sleeved on the auxiliary shaft (11) and rotates synchronously with the auxiliary shaft (11); a spring (13) which is sleeved on the auxiliary shaft (11), with two ends respectively abutting against the auxiliary shaft (11) and the sliding sleeve (12); A first toothed ring is circumferentially provided on an end surface of the sliding sleeve (12) away from the spring (13); A second gear ring is arranged inside the driven shaft (3) and meshes with the first gear ring.

5. The multi-head wire drawing machine according to claim 4, characterized in that: A plurality of first force transmission teeth (12a) are arranged in the first gear ring, and the side surface of the first force transmission teeth (12a) is a first inclined surface (12b); a plurality of second force transmission teeth (3a) are arranged in the second gear ring, and the side surface of the second force transmission teeth (3a) is a second inclined surface (3b) that is in contact with the first inclined surface (12b).

6. The multi-head wire drawing machine according to claim 4, characterized in that: A synchronously rotating replacement sleeve (3c) is arranged in the driven shaft (3), and the second gear ring is arranged on the replacement sleeve (3c).

7. The multi-head wire drawing machine according to claim 6, characterized in that: The inner wall of the driven shaft (3) is provided with a mounting groove (3d) extending along the axis; the replacement sleeve (3c) is provided with a plurality of mounting blocks (3e) extending along the axis, and the mounting blocks (3e) extend into the mounting groove (3d).

8. The multi-head wire drawing machine according to claim 7, characterized in that: The circumferential width of the mounting block (3e) is smaller than the circumferential width of the mounting groove (3d).

9. The multi-head wire drawing machine according to claim 4, characterized in that: Bearings are provided at both ends of the auxiliary shaft (11), and the outer side surfaces of the bearings abut against the inner wall of the driven shaft (3).

10. A multi-head wire drawing machine operating method, characterized in that: The multi-head wire drawing machine according to any one of claims 4 to 9, comprising: S10: The transmission shaft (5) moves upward, so that the first driving gear (6) and the first driven gear (7) are separated and the second driving gear (8) and the second driven gear (9) are separated; S20: Each end of the metal wire is hammered or ground into a fine shape, and then passed through a wire drawing die (4) and wound around the driving shaft (2) and the driven shaft (3); S30: Set the speed n1 and calculate n1 (D1 / D2) 2 The value is rounded up and recorded as n2; D1 is the diameter of the metal wire after processing, and D2 is the diameter of the metal wire before processing; S40: The transmission shaft (5) moves downward, so that the first driving gear (6) and the first driven gear (7) are meshed and the second driving gear (8) and the second driven gear (9) are meshed, and the driving shaft (2) is rotated at a speed of n1 and the auxiliary shaft (11) is rotated at a speed of n2, thereby achieving the processing of the metal wire.

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