A wire length cutting device

Abstract

The present application relates to wire segmenting device technical field, especially a kind of wire fixed-length cutting device, including the first wire feeding wheel group that can transport wire downstream, the wire cutting device further includes fixed-length roller group, wire cutting knife group, the fixed-length roller group has circumferentially distributed spiral limiting passage, the radial section of the spiral limiting passage corresponds with wire diameter, one end of the spiral limiting passage has import end, the other end has export end, the wire can enter spiral limiting passage by import end, export by export end, the fixed-length roller group has the cutout along its axial distribution and the communication spiral limiting passage, the wire cutting knife group can be cut off wire by the cutout.Utilize the space path length of spiral limiting passage to realize the fixed-length limit of wire, wire cutting knife group can cut off wire located in spiral limiting passage by cutout, to split continuous wire into multiple wire segments, to provide implementation basis for the automatic cutting of wire.

Description

Technical Field

[0001] This invention relates to the field of conductor segmentation equipment technology, and in particular to a conductor length cutting device. Background Technology

[0002] Conductors are widely used in various fields. During conductor processing, continuous conductors typically need to be cut into segments of predetermined lengths according to actual usage requirements. To improve production efficiency, manufacturers generally use automated wire cutting equipment for fixed-length feeding and cutting of conductors.

[0003] There are two types of existing wire cutting equipment: one is fixed-length wire cutting, and the other is intermittent fixed-length wire cutting. Intermittent fixed-length wire cutting uses a wire feeding wheel and a meter counter to achieve length control. The wire is fed through a feeding mechanism, and the length is monitored in real time using an encoder, meter counter, or length detection mechanism. Once the set length is reached, the feeding stops, and the wire is then cut by a cutter. While this type of equipment can achieve automatic wire cutting, it still has some drawbacks: the wire feeding mechanism usually needs to be started and stopped frequently, which can easily reduce production efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of frequent machine start-stop and low efficiency in the prior art, and to propose a wire cutting device for fixed length.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wire cutting device for fixed length includes a first feeding wheel assembly capable of conveying the wire downstream. The cutting device further includes a fixed length roller assembly and a cutting blade assembly. The fixed length roller assembly has a circumferentially distributed spiral limiting channel. The radial cross-section of the spiral limiting channel corresponds to the diameter of the wire. One end of the spiral limiting channel has an inlet end and the other end has an outlet end. The wire can enter the spiral limiting channel from the inlet end and exit from the outlet end. The fixed length roller assembly has slits distributed along its axial direction and communicating with the spiral limiting channel. The cutting blade assembly can cut the wire through the slits.

[0007] The present invention proposes a wire length cutting device with the following advantages: By using a first wire feeding wheel group, a length-fixing roller group, and a wire cutting blade group in conjunction, the wire enters the spiral limiting channel under the action of the first wire feeding wheel group and forms a conveying path of a preset length along the spiral limiting channel. The length of the spiral limiting channel is used to limit the length of the wire, providing a basis for wire length cutting. At the same time, the wire cutting blade group can cut the wire located in the spiral limiting channel through the cutting edge, thereby dividing the continuous wire into multiple wire segments, providing a basis for automatic wire cutting. Furthermore, since the cutting edge is distributed along the axial direction of the length-fixing roller group, the wire cutting blade group can cut the wire at multiple positions simultaneously, thereby obtaining multiple wire segments in one cut, and helping to reduce frequent start-ups and shutdowns of the equipment, improving wire processing efficiency. Attached Figure Description

[0008] Figure 1 This is a partial structural diagram of one embodiment of the present invention. Figure 1 ;

[0009] Figure 2 This is a partial structural diagram of one embodiment of the present invention. Figure 2 ;

[0010] Figure 3 This is a schematic diagram of the half-section structure of the roller and outer cylinder of the present invention;

[0011] Figure 4 This is a schematic diagram of the roller structure of the present invention;

[0012] Figure 5 This is a schematic diagram of the outer cylinder structure of the present invention;

[0013] Figure 6 This is a schematic diagram of the pore distribution and spiral limiting channel position structure of the present invention;

[0014] Figure 7 This is a schematic diagram of one distribution pattern of the cutting head and the wire of the present invention;

[0015] Figure 8 This is a schematic diagram of another distribution method of the cutting head and the wire of the present invention.

[0016] In the diagram: 1. Negative pressure suction nozzle; 2. Rotary connector; 3. Support shaft; 4. Circular roller; 5. Outer cylinder; 6. Inlet end; 7. Cutting end; 8. Cutting knife assembly; 9. Position detection component; 10. Outlet end; 11. First wire feeding wheel assembly; 12. Tensioning wheel assembly; 13. First air hole; 14. Spiral limiting channel; 15. Cavity; 16. Second air hole; 17. Spiral groove; 18. Second wire feeding wheel assembly; 100. Wire; 200. Fixed length roller assembly; 82. Cutting head. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figures 1-8 A wire cutting device for fixed length includes a first feeding wheel group 11 capable of conveying a wire 100 downstream. This device is designed for copper core wires with a certain degree of hardness, but is less effective for soft copper wires. The cutting device also includes a fixed length roller group 200 and a cutting knife group 8. The fixed length roller group 200 has a circumferentially distributed spiral limiting channel 14. The radial cross section of the spiral limiting channel 14 corresponds to the diameter of the wire 100, where corresponding means that it can only accommodate one wire. For example, the inner circumferential wall of the spiral limiting channel 14 is in contact with the outer circumferential wall of the wire. One end of the spiral limiting channel 14 has an inlet end 6 and the other end has an outlet end 10. The wire 100 can enter the spiral limiting channel 14 through the inlet end 6 and exit through the outlet end 10. The fixed length roller group 200 has slits 7 distributed along its axial direction and connected to the spiral limiting channel 14. The cutting knife group 8 can cut the wire 100 through the slits 7.

[0019] During operation, the conductor 100 moves downstream along the conveying direction under the action of the first feed roller group 11 and enters the fixed-length roller group 200 through the inlet end 6 of the spiral limiting channel 14. Since the spiral limiting channel 14 extends spirally along the circumference of the fixed-length roller group 200, the conductor 100, after entering the spiral limiting channel 14, is arranged along a spiral path and gradually extends towards the outlet end 10. As the first feed roller group 11 continuously conveys the conductor 100, the conductor 100 continuously fills along the spiral limiting channel 14, forming a preset path length within the fixed-length roller group 200 corresponding to the spiral limiting channel 14. When the conductor 100 reaches the preset conveying state, the cleaver group 8 extends into the spiral limiting channel 14 through the cutting end 7 and cuts the conductor 100. Since the cuts 7 are distributed along the axial direction of the fixed-length roller group 200 and are connected to the spiral limiting channel 14, the wire cutting knife group 8 can cut the wire 100 located in the spiral limiting channel 14 at multiple axial positions, thereby dividing the continuous wire 100 into multiple wire segments, and the cut wire segments can be discharged through the outlet end 10.

[0020] The conductor 100 enters the spiral limiting channel 14 under the action of the first feeding roller group 11, and forms a conveying path of a preset length along the spiral limiting channel 14. The spatial path length of the spiral limiting channel 14 is used to realize the fixed length limitation of the conductor 100, providing a basis for the fixed length cutting of the conductor 100. Since the cutting 7 is distributed along the axial direction of the fixed length roller group 200, the cutting knife group 8 can cut the conductor 100 at multiple positions, thereby forming multiple conductor segments in one cut. This provides a basis for realizing multi-segment division in one cut, and helps to reduce the frequent start and stop of the equipment and improve the efficiency of conductor processing.

[0021] As the wire enters the spiral limiting channel 14, the friction between the wire and the wall of the spiral limiting channel 14 gradually increases. (Reference) Figures 1-3 The fixed-length roller group 200 includes an outer cylinder 5 and a coaxial circular roller 4 located inside the outer cylinder 5. The outer cylinder 5 is fixed to the frame. The inner peripheral wall of the outer cylinder 5 is provided with an inwardly open spiral groove 17. The spiral groove 17 and the outer peripheral wall of the circular roller 4 form a spiral limiting channel 14. The circular roller 4 is driven by a motor assembly that can drive it to rotate.

[0022] By using an outer cylinder 5, a circular roller 4, and a motor assembly in conjunction, a spiral limiting channel 14 is formed between the spiral groove 17 on the inner circumferential wall of the outer cylinder 5 and the outer circumferential wall of the circular roller 4. After the wire enters the spiral limiting channel 14, it can be limited and guided along the spiral path. At the same time, the motor assembly can drive the circular roller 4 to rotate, and friction transmission is formed between the outer circumferential wall of the circular roller 4 and the wire, thereby driving the wire to move downstream along the spiral limiting channel 14. This provides a basis for the continuous conveying of the wire within the spiral limiting channel 14 and helps to improve the stability of the wire conveying.

[0023] refer to Figure 1 The first wire feeding wheel group 11 has a second wire feeding wheel group 18 and a tensioning wheel group 12 upstream. The tensioning wheel group 12 is located between the second wire feeding wheel group 18 and the first wire feeding wheel group 11. The second wire feeding wheel group 18 can continuously feed the wire 100 downstream. The first wire feeding wheel group 11 intermittently feeds the wire. The tensioning wheel group 12 can be used to buffer and tension the wire between the second wire feeding wheel group 18 and the first wire feeding wheel group 11.

[0024] When the first wire feeding wheel group 11 is working, it picks up the wire 100 from the tensioning wheel group 12 and feeds it to the fixed length roller group. When the wire 100 reaches the preset length, the first wire feeding wheel group 11 stops feeding, the motor assembly stops running, and the wire cutting knife group 8 cuts the wire 100. At this time, the second wire feeding wheel group 18 can still continuously feed the wire 100 and temporarily store the wire at the tensioning wheel group 12. After the cutting is completed, the first wire feeding wheel group 11 and the motor assembly are restarted and continue to feed the wire 100, thereby reducing the frequent start and stop of the upstream wire feeding mechanism, providing a basis for the continuous feeding of the wire 100, and achieving the effect of completing multiple cuts with one start and stop, which is conducive to improving wire cutting efficiency and reducing the number of equipment start and stop times.

[0025] The wire cutting device also includes an airflow assembly, which can be used to reduce the friction between the wire 100 and the wall of the spiral groove 17, increase the friction between the wire 100 and the outer peripheral wall of the roller 4, and reduce the ambient temperature of the spiral limiting channel 14.

[0026] As one implementation method, refer to Figure 3 , Figures 4-6 The airflow assembly includes a rotating connector 2, which has a negative pressure nozzle 1 for connecting to the suction device. The two ends of the roller 4 are coaxially fixed with support shafts 3. The rotating connector 2 is rotatably connected to one of the support shafts 3. The support shaft 3 is connected to the motor assembly for transmission. One of the support shafts 3 can connect the cavity 15 of the roller 4 with the negative pressure nozzle 1. Several second air holes 16 are opened on the periphery of the roller 4.

[0027] By using the airflow assembly, rotating connector 2, negative pressure nozzle 1, support shaft 3 and second air hole 16 together, the negative pressure nozzle 1 can form a negative pressure airflow after being connected to the suction device. The negative pressure airflow enters the cavity 15 of the roller 4 through the rotating connector 2 and support shaft 3, and draws gas towards the spiral limiting channel 14 through the second air hole 16 on the periphery of the roller 4.

[0028] Since the second air hole 16 is located on the periphery of the roller 4, the gas in the spiral limiting channel 14 can flow towards the roller 4, causing the wire 100 to tend to adhere to the outer peripheral wall of the roller 4 under the action of airflow. On the one hand, the contact pressure between the wire 100 and the outer peripheral wall of the roller 4 increases, and the roller 4 can more stably drive the wire 100 to move along the spiral limiting channel 14 through friction when rotating. On the other hand, the contact pressure between the wire 100 and the wall of the spiral groove 17 decreases, thereby reducing the frictional resistance between the wire 100 and the wall of the spiral groove 17. This helps to reduce the obstruction encountered by the wire 100 when it is conveyed in the spiral limiting channel 14 and improves the smoothness of the wire 100's movement along the spiral limiting channel 14.

[0029] Meanwhile, the negative pressure airflow continuously flows through the spiral limiting channel 14, which can carry away the heat generated by friction during the transmission of the conductor 100, so that a continuous gas flow environment is formed in the spiral limiting channel 14, thereby reducing the ambient temperature in the spiral limiting channel 14. This helps to reduce the softening, deformation or surface wear of the conductor 100 caused by temperature rise, and also helps to improve the stability of the conductor 100 during the transmission process.

[0030] Overall, the combination of the airflow assembly and the roller 4 not only provides a basis for the stable conveying of the wire 100 in the spiral limiting channel 14, but also takes into account the functions of drag reduction, friction increase and heat dissipation, providing a basis for the continuous conveying and fixed-length cutting of the wire 100.

[0031] In one embodiment, the outer cylinder 5 has several first air holes 13, at least some of which are corresponding to the spiral grooves 17. By providing the first air holes 13, external airflow can enter the spiral limiting channel 14 and flow towards the second air holes 16 under negative pressure, thereby causing the wire 100 to tend to adhere to the outer peripheral wall of the roller 4. This helps increase the friction between the wire 100 and the outer peripheral wall of the roller 4, improving the conveying stability of the wire 100 by the roller 4. It should be noted that the main purpose of rotating the roller 4 is to reduce the relative frictional resistance between the wire 100 and the spiral grooves 17, and to assist the wire 100 in moving along the spiral limiting channel 14, so as to prevent the wire 100 from getting stuck or blocked within the spiral limiting channel 14.

[0032] A positioning detection element 9 is provided at the outlet end 10 of the spiral limiting channel 14. The positioning detection element 9 can be used to detect whether the spiral limiting channel 14 is filled with wires. The positioning detection element 9 is linked with the first wire feeding wheel group 11 and the motor assembly. In one embodiment, the positioning detection element 9 is a photoelectric sensor assembly, a vision sensor assembly, or a proximity switch assembly. The first wire feeding wheel group 11 is equipped with a meter counter.

[0033] By using a positioning detection element 9, a meter counter, a first wire feeding wheel set 11, a second wire feeding wheel set 18, and a motor assembly in conjunction, the positioning detection element 9 can detect the filling status of the wire 100 in the spiral limiting channel 14. When the wire 100 moves along the spiral limiting channel 14 towards the outlet end 10 under the drive of the first wire feeding wheel set 11 and the circular roller 4, the wire 100 gradually fills the spiral limiting channel 14. When the wire 100 reaches the outlet end 10 and is detected by the positioning detection element 9, it indicates that the wire 100 has penetrated the spiral limiting channel 14 and completed the filling of the spiral limiting channel 14.

[0034] Since the path length of the spiral limiting channel 14 is a fixed value, for example, 30 meters, when the arrival detection element 9 detects that the wire 100 has reached the outlet end 10, it theoretically means that the spiral limiting channel 14 is filled with 30 meters of wire 100. At the same time, the meter counter installed on the first wire feeding wheel group 11 synchronously records the conveying length of the wire 100. When the conveying length recorded by the meter counter reaches the preset length and the arrival detection element 9 detects that the wire 100 has arrived, the filling status of the wire 100 can be verified from two dimensions: the actual position of the wire 100 and the conveying length of the wire 100, thereby improving the accuracy of the wire 100 length judgment.

[0035] When the arrival detection element 9 detects that the wire 100 is in place and the length detected by the meter counter reaches the preset value, the control system controls the first wire feeding wheel group 11 to stop feeding, and at the same time controls the motor assembly to stop driving the roller 4 to rotate, so that the wire 100 located in the spiral limiting channel 14 remains stationary, so that the wire cutting knife group 8 can cut the wire 100 through the cutting edge 7. The wire cutting knife group 8 can cut the wire by driving the cutter head to move through the cylinder. During the cutting process, the second wire feeding wheel group 18 can continuously feed the wire 100. The wire 100 fed by the second wire feeding wheel group 18 is temporarily buffered by the tensioning wheel group 12, thereby avoiding frequent start and stop of the upstream wire feeding mechanism.

[0036] After the cutting is completed, the first wire feeding wheel group 11 restarts, and the motor assembly drives the roller 4 to rotate again. Under the combined action of the first wire feeding wheel group 11 and the roller 4, the subsequent wire 100 continues to enter the spiral limiting channel 14, while simultaneously pushing the cut wire segment located in the spiral limiting channel 14 towards the outlet end 10, and finally discharging it from the outlet end 10, thereby achieving continuous fixed-length cutting of the wire 100. Through the dual detection of the arrival detection element 9 and the meter counter, it is possible not only to verify whether the wire 100 fills the spiral limiting channel 14, but also to reduce the length error caused by the wire 100 slipping, stretching, or abnormal conveying, thus improving the reliability and stability of the fixed-length cutting of the wire 100.

[0037] The arrival detection component is a photoelectric sensor assembly, a vision sensor assembly, or a proximity switch assembly. It is located near the exit end and is used to detect whether the wire has reached the exit end position. When the wire extends to the exit end and enters the corresponding detection area, the arrival detection component outputs an arrival signal to indicate that the wire has passed through the spiral limiting channel or that the spiral limiting channel has reached a preset filling state.

[0038] When the arrival detection device is a photoelectric sensor assembly, detection can be achieved by the wire blocking or reflecting the light path; when the arrival detection device is a vision sensor assembly, detection can be achieved by image acquisition and identification of whether the wire has entered the preset area; when the arrival detection device is a proximity switch assembly, detection can be achieved by detecting the wire entering the sensing range. Those skilled in the art can select a suitable detection method based on the wire material, size, and on-site environment, all with the aim of determining whether the wire has reached the exit end position and outputting the corresponding detection signal.

[0039] It should be noted that the positioning detection device is mainly used to detect whether a wire exists at the exit end, thereby determining whether the wire has reached the preset position. However, after the wire is cut, some of the cut wire segments may still be located within the spiral limiting channel or near the exit end. Therefore, relying solely on the detection results of the positioning detection device is insufficient to accurately determine whether a new, complete wire has been refilled within the spiral limiting channel. To improve the accuracy of the determination, this embodiment incorporates a meter counter for auxiliary judgment.

[0040] Specifically, the meter counter records the length of the wire conveyed by the first wire feeding wheel assembly. When the positioning detector detects a wire at the outlet end, the control system further reads the conveying length recorded by the meter counter. Only when the length recorded by the meter counter reaches the preset length is it determined that the spiral limit channel has been refilled to the preset state with new wire. Conversely, even if the positioning detector detects a wire at the outlet end, but the length recorded by the meter counter does not reach the preset length, it can be determined that the wire detected at the outlet end may be a wire segment that has not been completely discharged in the previous cycle. In this case, the control system continues to perform the conveying action without performing the cutting action.

[0041] By combining the in-place detection device with the meter counter, the filling status of the conductor can be judged from two dimensions: the actual position of the conductor and the length of the conductor being transported. This reduces the impact of residual conductor on the detection results and improves the accuracy of judgment and operational reliability during the conductor length cutting process.

[0042] It should be noted that, in order to determine whether the cut wire has been completely discharged, this embodiment uses a combination of a positioning detector and a meter counter. However, this application is not limited to this, and those skilled in the art can use other detection methods to determine the wire discharge status. For example, a visual counter can be set at the outlet end to count the discharged wire segments. When the number of wire segments detected by the visual counter reaches a preset number, it indicates that all the wire segments formed in this cutting have been discharged. At this time, it can be determined that there are no residual wire segments from the previous cycle in the spiral limiting channel, thereby allowing new wires to refill the spiral limiting channel and enter the next cutting cycle.

[0043] For example, a weight detection component, a photoelectric counting component, a wire presence detection component, or other detection devices capable of determining whether the wire segment has been completely discharged can be used to detect the wire discharge status. When the detection result meets the preset conditions, the control system determines that the cut wire has been completely discharged and allows the execution of the next cycle of fixed-length filling and cutting actions.

[0044] Therefore, the core of this application is not limited to using a meter counter to determine the wire filling status, but rather to confirm the filling and discharge status of the wire in the spiral limiting channel through one or more methods such as wire position detection, length detection, quantity detection, or discharge status detection, so as to improve the reliability of the fixed-length cutting process.

[0045] refer to Figure 1 , Figure 7 , Figure 8 The tangent assembly 8 includes several tangent heads 82 and multiple tangents 7, with each tangent 7 corresponding to one tangent head 82.

[0046] By setting multiple cutters 82 and multiple slits 7, the multiple cutters 82 can simultaneously extend into the spiral limiting channel 14 through the corresponding slits 7 and cut the wire 100, thereby forming multiple wire segments in one cutting action and improving the segmentation efficiency of the wire 100.

[0047] As one implementation method, multiple cuts 7 are evenly distributed along the axial direction of the fixed-length roller group 200. Since the pitch of the spiral limiting channel 14 is consistent, the corresponding wire path lengths between adjacent cuts 7 are the same. When multiple cutters 82 cut the wire 100 at the same time, multiple wire segments of the same length can be obtained, providing an implementation basis for the mass production of the wire 100.

[0048] As another implementation, multiple cuts 7 are distributed at non-equidistant intervals along the axial direction of the fixed-length roller group 200. The corresponding wire path lengths between different cuts 7 are different. When multiple cutters 82 cut the wire 100 at the same time, multiple wire segments of different lengths can be obtained, thereby realizing the acquisition of multiple specifications of wires in one cut. This provides an implementation basis for the synchronous processing of wires of different lengths and is conducive to improving the wire processing efficiency.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes to the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A wire cutting device for fixed length, comprising a first wire feeding wheel assembly (11) capable of conveying the wire (100) downstream, characterized in that, The wire cutting device further includes a fixed-length roller group (200) and a wire cutting knife group (8). The fixed-length roller group (200) has a circumferentially distributed spiral limiting channel (14). The radial cross section of the spiral limiting channel (14) corresponds to the diameter of the wire (100). One end of the spiral limiting channel (14) has an inlet end (6) and the other end has an outlet end (10). The wire (100) can enter the spiral limiting channel (14) from the inlet end (6) and exit from the outlet end (10). The fixed-length roller group (200) has slits (7) distributed along its axial direction and connected to the spiral limiting channel (14). The wire cutting knife group (8) can cut the wire (100) through the slits (7).

2. The wire cutting device for fixed length according to claim 1, characterized in that, The fixed-length roller group (200) includes an outer cylinder (5) and a coaxial circular roller (4) located inside the outer cylinder (5). The outer cylinder (5) is fixed to the frame. The inner peripheral wall of the outer cylinder (5) is provided with an inwardly open spiral groove (17). The spiral groove (17) and the outer peripheral wall of the circular roller (4) form the spiral limiting channel (14). The circular roller (4) is driven by a motor assembly that can drive it to rotate.

3. The wire cutting device for fixed length according to claim 2, characterized in that, The first wire feeding wheel group (11) is provided with a second wire feeding wheel group (18) and a tensioning wheel group (12) upstream. The tensioning wheel group (12) is located between the second wire feeding wheel group (18) and the first wire feeding wheel group (11). The second wire feeding wheel group (18) can continuously feed the wire (100) downstream. The first wire feeding wheel group (11) is an intermittent wire feeding wheel. The tensioning wheel group (12) can be used to buffer and tension the wire between the second wire feeding wheel group (18) and the first wire feeding wheel group (11).

4. A wire cutting device for fixed length according to claim 2, characterized in that, The wire cutting device also includes an airflow assembly, which can be used to reduce the friction between the wire (100) and the wall of the spiral groove (17), increase the friction between the wire (100) and the outer peripheral wall of the roller (4), and reduce the ambient temperature of the spiral limiting channel (14).

5. A wire cutting device for fixed length according to claim 4, characterized in that, The airflow assembly includes a rotating connector (2), which has a negative pressure nozzle (1) for connecting to the air intake device. The two ends of the roller (4) are coaxially fixed with support shafts (3). The rotating connector (2) is rotatably connected to one of the support shafts (3). The support shaft (3) is connected to the motor assembly for transmission. One of the support shafts (3) can connect the cavity (15) of the roller (4) with the negative pressure nozzle (1). The roller (4) has several second air holes (16) on its periphery.

6. A wire cutting device for fixed length according to claim 5, characterized in that, The outer cylinder (5) has a number of first air holes (13), and at least some of the first air holes (13) correspond to the spiral grooves (17).

7. A wire cutting device for fixed length according to claim 2, characterized in that, A positioning detection element (9) is provided at the outlet end (10) of the spiral limiting channel (14). The positioning detection element (9) can be used to detect whether the spiral limiting channel (14) is filled with wires. The positioning detection element (9) is linked with the first wire feeding wheel group (11) and the motor assembly.

8. A wire cutting device for fixed length according to claim 7, characterized in that, The positioning detection component (9) is a photoelectric sensor assembly, a vision sensor assembly, or a proximity switch assembly.

9. A wire cutting device for fixed length according to claim 8, characterized in that, The first wire feeder assembly (11) is equipped with a meter counter.

10. A wire cutting device for fixed length according to claim 1, characterized in that, The tangent assembly (8) includes a plurality of blades (82), and the slits (7) are multiple, with each slit (7) corresponding to one blade (82).

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