Wire threading mechanism for a wire saw machine

Abstract

This utility model discloses a wire threading mechanism for a wire EDM machine, comprising: a wire spool and a lower wire frame, the lower wire frame being equipped with a wire frame head, a wire guide rail being provided between the wire spool and the lower wire frame, and a wire loosening mechanism being provided below the wire spool. The wire guide rail includes a bridge plate, two sets of guide wheel groups, and two wire ropes. The guide wheel group includes wire guide wheel one, wire guide wheel two, wire guide wheel three, and wire guide wheel four. A wire pulling component is installed on the horizontal section of the wire rope between the two wire ropes. The side end of the wire pulling component forms two outwardly extending connectors, and the outer wall of the connectors forms roller protrusions. This utility model uses wire ropes and several guide wheels to replace the linear guide rail, and sets roller protrusions on the wire pulling component, so that the wire pulling component can be turned by the guide wheels, realizing the traction of the path from the wire guide tip to the molybdenum wire guide wheel to the wire spool, reducing the risk of molybdenum wire instability during transmission, ensuring the success rate of wire threading, and the wire guide rail structure is simple, easy to clean, reduces the failure rate, is reliable in operation, and is easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of wire cutting equipment, specifically a wire threading mechanism for a wire cutting machine tool. Background Technology

[0002] CNC wire EDM is a common type of electrical discharge machining, which uses a wire electrode to cut the workpiece by spark discharge. In CNC wire EDM, the relative motion between the workpiece and the wire electrode is controlled by digital information, and it is often used to process high-hardness materials, microstructures, complex shapes, high-precision dimensional parts, and high-surface-quality parts.

[0003] In automatic wire EDM machines with CNC reciprocating feed, after the automatic wire threading system passes the molybdenum wire through the lower guide head, the existing technology usually uses a guide tube powered by a roller feed mechanism and assisted by a pressurized fluid (gas or liquid) to directly guide the fine molybdenum wire into the automatic wire clamp of the machine's wire drum. This mechanism transports the fine molybdenum wire over long distances, and the wire is prone to instability during transport, making the transport difficult. To solve this problem, a lower feed mechanism using a linear guide rail-driven clamping and pulling carriage has emerged to pull the molybdenum wire from the molybdenum wire guide wheel to the wire drum. However, this mechanism still lacks traction for the molybdenum wire along the path from the lower guide tip to the molybdenum wire guide wheel, and there is still a risk of the molybdenum wire becoming unstable during transport, leading to wire threading failure. In addition, the linear module structure is relatively complex, and the mixture of saponified liquid and metal powder generated during processing is difficult to clean after contaminating the linear module, making it prone to failure and requiring cumbersome daily maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a wire threading mechanism for a wire EDM machine tool to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wire threading mechanism for a wire EDM machine tool, comprising: a wire spool and a lower wire frame, a wire frame head is provided at the end of the lower wire frame away from the wire spool, a wire inlet hole is provided at the upper end of the wire frame head, a molybdenum wire guide wheel is provided inside the wire frame head, a steel wire guide rail is provided between the wire spool and the lower wire frame, and a wire loosening mechanism is provided below the wire spool.

[0006] The wire guide rail includes a bridge plate, two sets of symmetrically arranged guide wheel groups, and two wire ropes wound on the two sets of guide wheel groups respectively. The bridge plate is located below the wire drum. The guide wheel group includes wire guide wheel one, wire guide wheel two, wire guide wheel three, and wire guide wheel four. Wire guide wheel one, wire guide wheel two, and wire guide wheel four are rotatably installed on the inner wall of the line frame head. Wire guide wheel one is located above wire guide wheel one, wire guide wheel two is located below wire guide wheel one, and wire guide wheel four is located below wire guide wheel two. Wire guide wheel three is rotatably installed at the end of the bridge plate away from the lower line frame. The wire ropes are wound on wire guide wheel one, wire guide wheel two, wire guide wheel three, and wire guide wheel four. A wire drawing component is installed on the horizontal section of the wire rope between the two wire ropes.

[0007] The side end of the wire drawing component has two outwardly extending connectors. The wire drawing component is installed on the horizontal section of the wire rope between the two wire ropes through the two connectors. The outer wall of the connector has a roller protrusion that cooperates with the guide groove of the second wire guide wheel.

[0008] Preferably, a drive mechanism for driving the wire rope is provided between the wire drum and the lower wire frame. A second molybdenum wire guide wheel is provided above the drive mechanism. The guide wheel group also includes a fifth wire guide wheel. The fifth wire guide wheel is rotatably mounted on the end of the bridge plate near the drive mechanism. The wire rope is wound on the first, second, third, and fourth wire guide wheels, the fifth wire guide wheel, and the output end of the drive mechanism. The guide groove of the fifth wire guide wheel cooperates with the roller protrusion.

[0009] Preferably, the wire drawing component is provided with a spring, two levers, and two wire drawing heads. A slide rail is provided in the middle of the wire drawing component, and the two wire drawing heads are symmetrically and slidably arranged in the slide rail. A spring groove is provided at the lower end of the wire drawing component, and the spring is installed in the spring groove. Both the spring and the spring groove are U-shaped. The middle parts of the two levers are respectively hinged to the two sides of the wire drawing component. One end of the lever is connected to the wire drawing head, and the other end of the lever abuts against the side of the spring. A pressing protrusion is provided on the side of the other end of the lever away from the spring. A wire inlet hole two communicating with the slide rail is provided on the upper end face of the wire drawing component, and a wire inlet space adapted to molybdenum wire is formed between the two wire drawing heads.

[0010] Preferably, the inner walls of the wire frame head are provided with limiting members on both sides that cooperate with the pressing protrusion.

[0011] Preferably, the wire drawing head is provided with a stepped section and a transmission groove. The stepped section includes three steps arranged from longest to shortest. The first step and the third step of the two wire drawing heads fit together, and the wire feeding space is formed between the second step of the two wire drawing heads. The transmission groove is an isosceles trapezoid, and one end of the lever is inserted into the transmission groove.

[0012] Preferably, the wire loosening mechanism is located at the end of the bridge plate away from the lower wire frame. The wire loosening mechanism includes a cylinder, a wire loosening clip, and several elastic elements. The wire loosening clip is slidably installed at the end of the bridge plate away from the lower wire frame. The cylinder drives the wire loosening clip to slide. One end of the wire loosening clip extends out of the upper surface of the bridge plate to form a wire loosening part. The wire loosening part is U-shaped. The elastic elements are installed between the wire loosening part and the bridge plate. One end of the elastic element abuts against the wire loosening part, and the other end of the elastic element abuts against the bridge plate. Wire loosening protrusions that cooperate with the pressing protrusions are formed on both sides of the inner wall of the open end of the wire loosening part.

[0013] Preferably, the output end of the cylinder is provided with a transmission component, and the other end of the loosening clip extends out of the lower end face of the bridge plate and is connected to several transmission rollers. The end of the transmission component near the transmission rollers forms a transmission protrusion that abuts against the transmission rollers. The end of the transmission protrusion that abuts against the transmission rollers adopts a rounded corner design. The upper end face of the bridge plate is provided with holes for installing elastic components.

[0014] Preferably, a positioning groove is formed between the wire drawing component and the two connecting components, and a positioning component that mates with the positioning groove is provided on the upper end of the bridge plate. The positioning component is located at the opening end of the loosening section.

[0015] Preferably, the lower end of the wire drum is provided with a linear module for driving the wire drum to move, and the wire drum is provided with a wire tightening mechanism for fixing the molybdenum wire.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model uses steel wire rope and several guide wheels to replace the linear guide rail, and sets roller protrusions on the wire drawing component so that the wire drawing component can be turned by the guide wheels, realizing the traction of the wire guide nozzle-molybdenum wire guide wheel-wire drum, reducing the risk of molybdenum wire instability during transmission, ensuring the success rate of wire threading, and the steel wire guide rail structure is simple, easy to clean, reduces the failure rate, is reliable in operation, and is easy to maintain. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the centerline frame head of this utility model;

[0021] Figure 4 This is a schematic diagram of the steel wire guide rail in this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the steel wire guide rail in this utility model;

[0024] Figure 7 This utility model Figure 6 Enlarged view of point B in the middle;

[0025] Figure 8 This is a schematic diagram of the structure of the wire drawing component and the limiting component in this utility model;

[0026] Figure 9 This is a schematic diagram of the internal structure of the wire drawing component in this utility model;

[0027] Figure 10 This is a schematic diagram of the wire drawing component in this utility model;

[0028] Figure 11 This is a schematic diagram of the wire drawing head in this utility model;

[0029] In the diagram: 1. Wire guide rail; 11. Bridge plate; 111. Hole; 112. Positioning component; 12. Guide wheel assembly; 121. Wire guide wheel one; 122. Wire guide wheel two; 123. Wire guide wheel three; 124. Wire guide wheel four; 125. Wire guide wheel five; 13. Wire rope; 14. Wire drawing component; 141. Slide rail; 142. Spring groove; 143. Wire inlet hole two; 144. Positioning groove; 15. Connector; 151. Roller protrusion; 16. Spring; 17. Lever; 171. Pressing protrusion; 18. Wire drawing head; 18 1. Step 1; 182. Step 2; 183. Step 3; 184. Wire feeding space; 185. Transmission groove; 2. Wire loosening mechanism; 21. Cylinder; 211. Transmission component; 212. Transmission protrusion; 22. Wire loosening clamp; 221. Wire loosening section; 222. Wire loosening protrusion; 223. Transmission roller; 3. Wire drum; 31. Linear module; 32. Wire tightening mechanism; 4. Lower wire frame; 41. Wire frame head; 42. Wire feeding hole 1; 43. Molybdenum wire guide wheel 1; 44. Limiting component; 5. Drive mechanism; 51. Molybdenum wire guide wheel 2; 6. Molybdenum wire. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-11This utility model provides a technical solution for a wire threading mechanism for a wire EDM machine: A wire threading mechanism for a wire EDM machine includes: a wire spool 3 and a lower wire frame 4. A wire frame head 41 is provided at the end of the lower wire frame 4 away from the wire spool 3. A wire inlet hole 42 is provided at the upper end of the wire frame head 41 for connecting to the lower wire guide nozzle. A molybdenum wire guide wheel 43 is provided inside the wire frame head 41. A steel wire guide rail 1 is provided between the wire spool 3 and the lower wire frame 4. A wire loosening mechanism 2 is provided below the wire spool 3.

[0032] The wire guide rail 1 includes a bridge plate 11, two sets of symmetrically arranged guide wheel groups 12, and two wire ropes 13 respectively wound on the two sets of guide wheel groups 12. The bridge plate 11 is located below the wire drum 3. The guide wheel group 12 includes a first wire guide wheel 121, a second wire guide wheel 122, a third wire guide wheel 123, and a fourth wire guide wheel 124. The first wire guide wheel 121, the second wire guide wheel 122, and the fourth wire guide wheel 124 are all rotatably installed on the inner wall of the line frame head 41. The first wire guide wheel 121... 1 is located above the first molybdenum wire guide wheel 43, the second steel wire guide wheel 122 is located below the first molybdenum wire guide wheel 43, the fourth steel wire guide wheel 124 is located below the second steel wire guide wheel 122, and the third steel wire guide wheel 123 is rotatably installed at the end of the bridge plate 11 away from the lower wire frame 4. The steel wire rope 13 is wound around the first steel wire guide wheel 121, the second steel wire guide wheel 122, the third steel wire guide wheel 123 and the fourth steel wire guide wheel 124. A wire drawing component 14 is installed on the horizontal section of the steel wire rope between the two steel wire ropes 13.

[0033] The side end of the wire drawing member 14 has two outwardly extending connectors 15. The wire drawing member 14 is installed on the horizontal section of the wire rope between the two wire ropes 13 through the two connectors 15, so that the wire drawing member 14 can run smoothly. The outer wall of the connector 15 has a roller protrusion 151 that cooperates with the guide groove of the wire guide wheel 122.

[0034] During wire threading, the wire cutting equipment guides the molybdenum wire 6 down from the inlet hole 42 into the wire drawing member 14. The wire drawing member 14 tightens the molybdenum wire 6 and then pulls it along the wire guide rail 1 to the bottom of the wire drum 3. During the traction process, a roller protrusion passes through the guide groove of the wire guide wheel 122, causing the molybdenum wire 6 to turn and wrap around the guide groove of the molybdenum wire guide wheel 43. This utility model uses a wire rope and several guide wheels to replace the linear guide rail, and a roller protrusion 151 is set on the wire drawing member 14 so that the wire drawing member 14 can turn through the guide wheels, realizing the traction of the path from the wire guide nozzle to the molybdenum wire guide wheel to the wire drum 3, reducing the risk of instability of the molybdenum wire 6 during transmission, ensuring the success rate of wire threading. The wire guide rail 13 has a simple structure, is easy to clean, reduces the failure rate, is reliable in operation, and is easy to maintain.

[0035] In this embodiment, a drive mechanism 5 for driving the steel wire rope 13 is provided between the wire spool 3 and the lower wire frame 4. A second molybdenum wire guide wheel 51 is provided above the drive mechanism 5. The guide wheel group 12 also includes a fifth steel wire guide wheel 125. The fifth steel wire guide wheel 125 is rotatably mounted on the bridge plate 11 near the drive mechanism 5. The steel wire rope 13 is wound around the first steel wire guide wheel 121, the second steel wire guide wheel 122, the third steel wire guide wheel 123, the fourth steel wire guide wheel 124, the fifth steel wire guide wheel 125, and the output end of the drive mechanism 5. The guide groove of the fifth steel wire guide wheel 125 cooperates with the roller protrusion 151. When automatically threading the wire, the wire drawing member 14 passes through the fifth steel wire guide wheel 125 and winds the molybdenum wire 6 around the guide groove of the second molybdenum wire guide wheel 51.

[0036] In this embodiment, the wire drawing component 14 is provided with a spring piece 16, two levers 17, and two wire drawing heads 18. A slide rail 141 is provided in the middle of the wire drawing component 14. The two wire drawing heads 18 are symmetrically and slidably disposed in the slide rail 141. A spring piece groove 142 is provided at the lower end of the wire drawing component 14, and the spring piece 16 is installed in the spring piece groove 142. Both the spring piece 16 and the spring piece groove 142 are U-shaped. The middle portions of the two levers 17 are respectively hinged to both sides of the wire drawing component 14. One end of the lever 17 is connected to the wire drawing head 18, and the other end of the lever 17 abuts against the side of the spring piece 16. A pressing protrusion 171 is provided on the side of the other end of the lever 17 away from the spring piece 16. A wire inlet hole 143 communicating with the slide rail 141 is provided on the upper surface of the wire drawing component 14. The two wire drawing heads... A wire feeding space 184 is formed between 18 to accommodate the molybdenum wire 6. Limiting members 44 that cooperate with the pressing protrusion 171 are respectively provided on both sides of the inner wall of the wire frame head 41. During automatic wire threading, the wire cutting equipment guides the molybdenum wire 6 to descend and enter from the wire feeding hole 42. The wire pulling member 14 rises along the wire guide rail 1 until the pressing protrusion 171 abuts against the limiting member 44, and then continues to rise. At this time, the pressing member presses the other end of the lever 17 into the wire pulling member 14. One end of the lever 17 drives the two wire pulling heads 18 to separate, and the molybdenum wire 6 descends into the wire feeding space 184. Then the wire pulling member 14 descends, and the lever 17 is reset under the action of the spring piece 16, so that the two wire pulling heads 18 close and tighten the molybdenum wire 6. Then the wire pulling head 18 pulls the molybdenum wire 6 to the bottom of the wire drum 3 along the wire guide rail 1.

[0037] In this embodiment, the wire drawing head 18 is provided with a stepped portion and a transmission groove 185. The stepped portion includes a first step 181, a second step 182, and a third step 183 arranged in order from longest to shortest. The first step 181 and the third step 183 of the two wire drawing heads 18 fit together. A wire feeding space 184 is formed between the second step 182 of the two wire drawing heads 18. The transmission groove 185 is an isosceles trapezoid. One end of the lever 17 is inserted into the transmission groove 185. When the other end of the lever 17 is pressed into the wire drawing member 14, one end of the lever 17 is raised, causing the two wire drawing heads 18 to separate, making the wire feeding space 184 larger, which facilitates the entry of the molybdenum wire 6. Then, under the action of the spring piece 16, it is reset, and the two wire drawing heads 18 close together to tighten the molybdenum wire 6.

[0038] In this embodiment, the wire loosening mechanism 2 is located at the end of the bridge plate 11 away from the lower wire frame 4. The wire loosening mechanism 2 includes a cylinder 21, a wire loosening clamp 22, and several elastic members. The wire loosening clamp 22 is slidably installed at the end of the bridge plate 11 away from the lower wire frame 4. The cylinder 21 drives the wire loosening clamp 22 to slide. One end of the wire loosening clamp 22 extends out of the upper end surface of the bridge plate 11 to form a wire loosening portion 221. The wire loosening portion 221 is U-shaped. The elastic members are installed between the wire loosening portion 221 and the bridge plate 11. One end of the elastic member abuts against the wire loosening portion 221, and the other end of the elastic member abuts against the bridge plate 11. The inner walls of the open end of the wire loosening portion 221 are respectively... A loosening protrusion 222 is formed to cooperate with the pressing protrusion 171. When the wire drawing member 14 transports the molybdenum wire 6 to the wire drum 3 and the wire drum 3 clamps the molybdenum wire 6, the wire drawing member 14 is at the open end of the loosening part 221, and the pressing protrusion 171 is located below the loosening protrusion 222. Then, the cylinder 21 drives the loosening clamp 22 to move downward, so that the loosening protrusion 222 presses the other end of the lever 17 into the wire drawing member 14, causing the two wire drawing heads 18 to separate and loosen the molybdenum wire 6. After the loosening is completed, the loosening clamp 22 resets and rises under the action of the elastic member and separates from the lever 17. Finally, the wire drum 3 works to wind the molybdenum wire 6 onto the wire drum 3.

[0039] In this embodiment, the output end of the cylinder 21 is provided with a transmission component 211, and the other end of the loosening clip 22 extends out of the lower end face of the bridge plate 11 and is connected to several transmission rollers 223. The end of the transmission component 211 near the transmission rollers 223 has a transmission protrusion 212 that abuts against the transmission rollers 223. The end of the transmission protrusion 212 that abuts against the transmission rollers 223 is designed with rounded corners. The upper end face of the bridge plate 11 is provided with holes 111 for installing elastic components. After the loosening is completed, the cylinder 21 drives the transmission component 211 to retract, and the loosening clip 22 is reset under the action of the elastic components.

[0040] In this embodiment, a positioning groove 144 is formed between the wire drawing member 14 and the two connecting members 15. A positioning member 112 that cooperates with the positioning groove 144 is provided on the upper end of the bridge plate 11. The positioning member 112 is located at the opening end of the loosening part 221. When the wire drawing member 14 moves to the opening end of the loosening part 221, it enters the positioning member 112 through the positioning groove 144 to prevent the wire drawing member 14 from deviating.

[0041] In this embodiment, a linear module 31 for moving the wire drum 3 is provided at the lower end of the wire drum 3, and a wire tensioning mechanism 32 for fixing the molybdenum wire 6 is provided on the wire drum 3.

[0042] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wire threading mechanism for a wire electrical discharge machine, comprising: The lower wire frame (4) is provided with a wire frame head (41) at one end away from the wire spool (3), and a wire inlet hole (42) is provided at the upper end of the wire frame head (41). A molybdenum wire guide wheel (43) is provided inside the wire frame head (41). The feature is that a steel wire guide rail (1) is provided between the wire spool (3) and the lower wire frame (4), and a wire loosening mechanism (2) is provided below the wire spool (3). The wire guide rail (1) includes a bridge plate (11), two sets of symmetrically arranged guide wheel groups (12), and two wire ropes (13) respectively wound on the two sets of guide wheel groups (12). The bridge plate (11) is located below the wire drum (3). The guide wheel group (12) includes wire guide wheel one (121), wire guide wheel two (122), wire guide wheel three (123), and wire guide wheel four (124). Wire guide wheel one (121), wire guide wheel two (122), and wire guide wheel four (124) are rotatably installed on the inner wall of the wire frame head (41). 121) is located above the first molybdenum wire guide wheel (43), the second steel wire guide wheel (122) is located below the first molybdenum wire guide wheel (43), the fourth steel wire guide wheel (124) is located below the second steel wire guide wheel (122), and the third steel wire guide wheel (123) is rotatably installed at one end of the bridge plate (11) away from the lower wire frame (4). The steel wire rope (13) is wound on the first steel wire guide wheel (121), the second steel wire guide wheel (122), the third steel wire guide wheel (123) and the fourth steel wire guide wheel (124). A wire drawing component (14) is installed on the horizontal section of the steel wire rope between the two steel wire ropes (13). The wire drawing member (14) has two outwardly extending connectors (15) on its side end. The wire drawing member (14) is installed on the horizontal section of the wire rope between the two wire ropes (13) through the two connectors (15). The outer wall of the connector (15) has a roller protrusion (151) that cooperates with the guide groove of the second wire guide wheel (122).

2. The wire threading mechanism for a linear cutting machine according to claim 1, wherein A drive mechanism (5) for driving the wire rope (13) is provided between the wire spool (3) and the lower wire frame (4). A molybdenum wire guide wheel two (51) is provided above the drive mechanism (5). The guide wheel group (12) also includes a wire guide wheel five (125). The wire guide wheel five (125) is rotatably installed on the bridge plate (11) near the drive mechanism (5). The wire rope (13) is wound around the wire guide wheel one (121), the wire guide wheel two (122), the wire guide wheel three (123), the wire guide wheel four (124), the wire guide wheel five (125), and the output end of the drive mechanism (5). The guide groove of the wire guide wheel five (125) cooperates with the roller protrusion (151).

3. The wire threading mechanism for a linear cutting machine according to claim 1, wherein The wire drawing component (14) is provided with a spring piece (16), two levers (17) and two wire drawing heads (18). A slide rail (141) is provided in the middle of the wire drawing component (14), and the two wire drawing heads (18) are symmetrically and slidably arranged in the slide rail (141). A spring piece groove (142) is provided at the lower end of the wire drawing component (14), and the spring piece (16) is installed in the spring piece groove (142). Both the spring piece (16) and the spring piece groove (142) are U-shaped. The two levers (17) are also provided. The middle part is respectively hinged to both sides of the wire drawing part (14). One end of the lever (17) is connected to the wire drawing head (18), and the other end of the lever (17) abuts against the side of the spring piece (16). The other end of the lever (17) away from the spring piece (16) is provided with a pressing protrusion (171). The upper end surface of the wire drawing part (14) is provided with a wire inlet hole (143) that connects to the slide rail (141). A wire inlet space (184) that is compatible with the molybdenum wire is formed between the two wire drawing heads (18).

4. The wire threading mechanism for a wire EDM machine according to claim 3, characterized in that, The inner walls of the wire frame head (41) are respectively provided with limiting members (44) that cooperate with the pressing protrusion (171).

5. The wire threading mechanism for a linear cutting machine according to claim 3, wherein The wire drawing head (18) is provided with a stepped section and a transmission groove (185). The stepped section includes a first step (181), a second step (182), and a third step (183) arranged in order from longest to shortest. The first step (181) and the third step (183) of the two wire drawing heads (18) fit together. The wire feeding space (184) is formed between the second step (182) of the two wire drawing heads (18). The transmission groove (185) is an isosceles trapezoid, and one end of the lever (17) is inserted into the transmission groove (185).

6. The wire threading mechanism for a linear cutting machine according to claim 5, wherein The loosening mechanism (2) is located at the end of the bridge plate (11) away from the lower wire frame (4). The loosening mechanism (2) includes a cylinder (21), a loosening clip (22), and several elastic elements. The loosening clip (22) is slidably installed at the end of the bridge plate (11) away from the lower wire frame (4). The cylinder (21) drives the loosening clip (22) to slide. One end of the loosening clip (22) extends out of the upper end face of the bridge plate (11) to form a loosening part (221). The loosening part (221) is U-shaped. The elastic elements are installed between the loosening part (221) and the bridge plate (11). One end of the elastic element abuts against the loosening part (221), and the other end of the elastic element abuts against the bridge plate (11). Loosening protrusions (222) that cooperate with the pressing protrusions (171) are formed on both sides of the inner wall of the opening end of the loosening part (221).

7. The wire threading mechanism for a linear cutting machine according to claim 6, wherein The output end of the cylinder (21) is provided with a transmission component (211). The other end of the loosening clip (22) extends out of the lower end face of the bridge plate (11) and is connected to several transmission rollers (223). The end of the transmission component (211) near the transmission roller (223) forms a transmission protrusion (212) that abuts against the transmission roller (223). The end of the transmission protrusion (212) that abuts against the transmission roller (223) adopts a rounded corner design. The upper end face of the bridge plate (11) is provided with holes (111) for installing elastic components.

8. The wire threading mechanism for a linear cutting machine according to claim 7, wherein The drawing member (14) forms a positioning groove (144) between the two connecting members (15). The upper end of the bridge plate (11) is provided with a positioning member (112) that cooperates with the positioning groove (144). The positioning member (112) is located at the opening end of the loosening part (221).

9. The wire threading mechanism for a linear cutting machine according to claim 1, wherein The lower end of the wire drum (3) is provided with a linear module (31) for driving the wire drum (3) to move, and the wire drum (3) is provided with a wire tensioning mechanism (32) for fixing the molybdenum wire.

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