Automatic wire electrode threading mechanism and wire cut electric discharge machine
By designing the electrode wire automatic threading mechanism, using the annealing part to soften the electrode wire and using the nozzle jet liquid column guidance, the accuracy problem of large-wire-diameter electrode wire during the threading process is solved, and the processing efficiency of the electric spark wire cutting machine is improved.
Patent Information
- Application Number
- CN202422354681.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing automatic wire-piercing mechanism is difficult to ensure that the large wire-diameter electrode wire remains vertical during the process of passing from the upper head to the lower head, resulting in insufficient accuracy and the inability to efficiently process large molds.
An automatic wire threading mechanism of electrode wire is designed, including an annealing part, an upper and lower machine head. The electrode wire is softened through the annealing part, and the nozzle jet column is used to guide the electrode wire into the horn-shaped guide port to ensure that the electrode wire is accurately penetrated into the wiring channel.
It realizes the precise penetration of large wire diameter electrode wires, improves the processing efficiency of the electric spark wire cutting machine, and can effectively process large molds.
Smart Images
Figure CN223114309U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automatic electrode wire threading, in particular to an automatic electrode wire threading mechanism and an electric spark wire cutting machine. Background Art
[0002] In recent years, emerging industries such as new energy vehicles have driven the vigorous development of the mold industry. The mold industry has an increasing demand for processing equipment, and the continuous expansion of mold specifications is one of the demands that cannot be ignored. However, when processing the enlarged mold, due to the large thickness of the workpiece, it often takes several times longer to process than conventional molds.
[0003] In order to improve the processing efficiency of large molds, it is often necessary to apply a larger processing current to the electrode wire, so it is often necessary to use a large wire diameter electrode wire (wire diameter of Φ0.4mm and above). However, since the electrode wire of the wire cutting machine is wound on a cylindrical wire drum, as the diameter of the electrode wire increases, its stiffness also increases accordingly, so the large wire diameter electrode wire is easier to maintain a curled state when there is no external force constraint.
[0004] Currently, the electrode wire is mostly softened and threaded through a jet. However, since the water flow is more divergent during the jet process, only the electrode wire with a small wire diameter can be pulled. However, for the electrode wire with a large wire diameter, it cannot be guaranteed that the electrode wire with a large wire diameter can remain in a vertical state when passing from the upper head to the lower head during the threading process. Therefore, the existing automatic threading mechanism is difficult to ensure that the electrode wire with a large wire diameter can be accurately threaded into the lower head.
[0005] Therefore, the above problems need to be solved urgently. Utility Model Content
[0006] The utility model aims to provide an automatic wire threading mechanism for electrode wire and an electric spark wire cutting machine to ensure the accuracy of electrode wire with large wire diameter during the threading process.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] An automatic wire threading mechanism for an electrode wire, along the threading direction of the electrode wire, the automatic wire threading mechanism for the electrode wire comprises an annealing part, an upper machine head and a lower machine head, and the annealing part, the upper machine head and the lower machine head are arranged at intervals along the height direction;
[0009] The annealing part has an annealing channel through which the electrode wire is passed, the upper machine head includes a nozzle with a liquid flow channel, the lower machine head has a wiring channel, and the electrode wire passes through the annealing channel, the liquid flow channel and the wiring channel in sequence;
[0010] Wherein, the annealing part is used to soften the electrode wire;
[0011] The nozzle is capable of jetting a liquid column between the liquid flow channel and the wiring channel;
[0012] On one side of the lower machine head facing the upper machine head, a guiding part is provided. The guiding part has a guiding port communicating with the wiring channel, and the guiding port is in a flared shape.
[0013] Preferably, along the flowing direction of the liquid, conical surfaces are spaced inside the liquid flow channel to gradually reduce the diameter of the liquid flow channel.
[0014] Preferably, rectifying grooves are evenly distributed on the conical surfaces, and the length direction of the rectifying grooves is consistent with the flowing direction of the liquid.
[0015] Preferably, a cylindrical surface is provided between two adjacent conical surfaces.
[0016] Preferably, a throttling piece is detachably provided at the liquid outlet of the liquid flow channel, and a throttling hole for adjusting the size of the liquid outlet is provided on the throttling piece..
[0017] Preferably, the annealing part includes:
[0018] Two annealing wheels both capable of rotating around their own axes. A gap is provided between the two annealing wheels to form the annealing channel;
[0019] A cylinder. The piston rod of the cylinder is connected to one of the annealing wheels, and the cylinder can push the one annealing wheel closer to the other annealing wheel to clamp the electrode wire.
[0020] Preferably, the guiding part and the wiring end of the wiring channel are integrally formed.
[0021] Preferably, the liquid flow channel, the guiding port and the wiring channel are coaxially arranged.
[0022] A wire electrical discharge machine for machining a mold, comprising:
[0023] The electrode wire automatic threading mechanism as described above;
[0024] A guiding wheel, arranged on the downstream side of the wiring channel and used for changing the threading direction of the electrode wire;
[0025] A tensioning mechanism, arranged on the downstream side of the guiding wheel and used for keeping the electrode wire in a tensioned state;
[0026] A cutting head, arranged on the downstream side of the tensioning mechanism to receive the electrode wire, and the cutting head can cut the mold through the electrode wire.
[0027] Advantages of the present utility model:
[0028] The automatic wire threading mechanism for the electrode wire of the present utility model can anneal the electrode wire under the action of the annealing section, so that the electrode wire can be heated to the annealing temperature and maintained for a period of time, releasing the stress inside the electrode wire to soften the electrode wire. Subsequently, the electrode wire enters the liquid flow channel and can be guided by the liquid column sprayed by the nozzle to approach the lower head, and can accurately penetrate into the wiring channel under the action of the guiding port.
[0029] The wire cut electric discharge machine of the present utility model can complete the automatic wire threading of the electrode wire with a large wire diameter under the action of the automatic wire threading mechanism for the electrode wire, so that the wire cut electric discharge machine can use the electrode wire with a large wire diameter to process the mold. Description of the drawings
[0030] Figure 1 is a schematic structural diagram of the automatic wire threading mechanism for the electrode wire in the embodiment of the present utility model;
[0031] Figure 2 is a cross-sectional view of the nozzle in the embodiment of the present utility model;
[0032] Figure 3 is a schematic structural diagram of the lower head in the embodiment of the present utility model.
[0033] In the figure:
[0034] 100, electrode wire; 200, guide pulley; 300, tensioning mechanism;
[0035] 1, annealing section; 11, annealing wheel;
[0036] 2, upper head; 21, nozzle; 211, liquid flow channel; 212, conical surface; 213, rectifying groove; 214, cylindrical surface; 22, current intercepting piece;
[0037] 3, lower head; 31, guiding section; 311, guiding port. Detailed implementation manners
[0038] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.
[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.
[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0042] Please refer to Figures 1 to 3 , in this embodiment, an automatic wire threading mechanism for the electrode wire 100 is proposed. Along the wire threading direction of the electrode wire 100, the automatic wire threading mechanism for the electrode wire 100 includes an annealing part 1, an upper head 2, and a lower head 3, and the annealing part 1, the upper head 2, and the lower head 3 are arranged at intervals in the height direction; the annealing part 1 has an annealing channel for threading the electrode wire 100, the upper head 2 includes a nozzle 21 with a liquid flow channel 211, the lower head 3 has a wiring channel, and the electrode wire 100 passes through the annealing channel, the liquid flow channel 211, and the wiring channel in sequence; wherein, the annealing part 1 is used to soften the electrode wire 100; the nozzle 21 can spray a liquid column between the liquid flow channel 211 and the wiring channel; a guiding part 31 is arranged on one side of the lower head 3 facing the upper head 2, the guiding part 31 has a guiding port 311 communicating with the wiring channel, and the guiding port 311 is in a flared shape.
[0043] It can be understood that under the action of the annealing section 1, the electrode wire 100 can be annealed, so that the electrode wire 100 can be heated to the annealing temperature and maintained for a period of time, the stress inside the electrode wire 100 can be released, so that the electrode wire 100 is softened. Subsequently, the electrode wire 100 enters the liquid flow channel 211, and under the action of the liquid column ejected by the nozzle 21, the electrode wire 100 can be guided to approach the lower head 3, and under the action of the guiding port 311, the electrode wire 100 can accurately penetrate into the wiring channel.
[0044] It should be noted that a wire spool (not shown in the figure) is provided upstream of the annealing section 1. The electrode wire 100 with a large wire diameter is wound around the wire spool, and the wire spool is used to release the electrode wire 100, and the annealing channel is used to receive the electrode wire 100 released by the wire spool.
[0045] Along the liquid flow direction, conical surfaces 212 are arranged at intervals inside the liquid flow channel 211 to gradually reduce the diameter of the liquid flow channel 211. The conical surfaces 212 are arranged at intervals inside the liquid flow channel 211, which can shorten the diameter of the liquid flow channel 211, so as to accelerate the liquid flow rate, complete the shaping and gathering of the liquid, and further avoid the phenomenon of disordered liquid path, so as to ensure that the electrode wire 100 with a large wire diameter vertically passes from the upper head 2 to the lower head 3.
[0046] In addition, in this embodiment, the number of conical surfaces 212 is set to be multiple, and a cylindrical surface 214 is arranged between two adjacent conical surfaces 212. The number of conical surfaces 212 is preferably two. The two conical surfaces 212 are respectively named the first conical surface and the second conical surface. The first conical surface is above the second conical surface, and one end of the cylindrical surface 214 is connected to the small circular end of the first conical surface, and the other end is connected to the large circular end of the second conical surface, so as to ensure the stability of the liquid during the flow process.
[0047] In some other feasible embodiments, the number of conical surfaces 212 is determined according to actual needs and will not be elaborated here.
[0048] In this embodiment, rectifying grooves 213 are evenly distributed on the conical surfaces 212, and the length direction of the rectifying grooves 213 is the same as the liquid flow direction. The setting of the rectifying grooves 213 can reduce the phenomenon of turbulence when the liquid flows, so as to further shape the liquid, avoid the phenomenon of disordered liquid path, and further ensure that the electrode wire 100 with a large wire diameter passes from the upper head 2 to the lower head 3.
[0049] Further, a throttling piece 22 is detachably arranged at the liquid outlet of the liquid flow channel 211, and a throttling hole for adjusting the size of the liquid outlet is arranged on the throttling piece 22. By replacing throttling pieces 22 of different models, the size of the throttling hole can be changed, so that the size of the liquid outlet can be controlled, and further the initial velocity of the liquid flowing out of the liquid flow channel 211 can be increased to avoid the phenomenon of disorder in the liquid path, and further ensure that the electrode wire 100 with a large wire diameter passes from the upper machine head 2 to the lower machine head 3. Among them, the throttling piece 22 is preferably an annular ceramic piece.
[0050] In this embodiment, the annealing part includes two annealing wheels 11 that can rotate around their own axes and a cylinder. A gap is arranged between the two annealing wheels 11 to form an annealing channel; the piston rod of the cylinder is connected to one of the annealing wheels 11, and the cylinder can push one of the annealing wheels 11 closer to the other annealing wheel 11 to press the electrode wire. It can be understood that the electrode wire 100 released from the wire reel can pass through the annealing channel. Under the action of the cylinder, the two annealing wheels 11 can press the electrode wire 100, and under the action of the annealing wheels 11, the electrode wire 100 can be annealed, so that the electrode wire 100 can be softened.
[0051] In addition, to prevent the two annealing wheels 11 from coming into hard contact due to excessive cylinder stroke during the process of the cylinder driving the annealing wheel 11 to move, resulting in damage to the electrode wire 100 or the annealing wheel 11, a spring is arranged between the cylinder and the annealing wheel as a buffer.
[0052] It should be noted that the annealing part 1 can provide annealing conditions for the electrode wire 100 to complete annealing. In addition, in some other feasible embodiments, the annealing part 1 is an annealing power supply adapted to the electrode wire 100 with a large wire diameter.
[0053] In this embodiment, the liquid flow channel 211, the guiding port 311 and the wiring channel are coaxially arranged. Thereby, the accuracy during the threading process of the electrode wire 100 can be ensured, and further it can be ensured that the electrode wire 100 with a large wire diameter passes from the upper machine head 2 to the lower machine head 3.
[0054] In addition, the guiding part 31 and the wiring end of the wiring channel are integrally formed. Such a setting can improve the connection strength between the guiding part 31 and the wiring end of the wiring channel to avoid displacement between the guiding part 31 and the wiring channel due to long-term liquid scouring.
[0055] In this embodiment, a wire electrical discharge machine for processing molds is also proposed, which includes: an automatic wire threading mechanism for the electrode wire 100 as described above, a guide pulley 200, a tensioning mechanism 300, and a cutting head. The guide pulley 200 is arranged on the downstream side of the wiring channel and is used to change the threading direction of the electrode wire 100; the tensioning mechanism 300 is arranged on the downstream side of the guide pulley 200 and is used to keep the electrode wire 100 in a tensioned state; the cutting head is arranged on the downstream side of the tensioning mechanism 300 to receive the electrode wire 100, and the cutting head can cut the mold through the electrode wire 100. It can be understood that after the wire harness passes out of the wiring channel, it can complete a turn under the action of the guide pulley 200. At this time, the liquid flows out of the wiring channel, so that the liquid is separated from the wiring channel, and the electrode wire 100 can be kept in a tensioned state under the action of the tensioning mechanism 300, and then the electrode wire 100 is introduced into the cutting head. Under the action of the automatic wire threading mechanism for the electrode wire 100, automatic wire threading of the electrode wire 100 with a large wire diameter can be completed, so that the wire electrical discharge machine can use the electrode wire 100 with a large wire diameter to process the mold, thereby improving the efficiency of processing the mold.
[0056] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. An automatic wire threading mechanism for an electrode wire, characterized in that, Along the wire threading direction of the electrode wire (100), the automatic wire threading mechanism of the electrode wire includes an annealing part (1), an upper machine head (2), and a lower machine head (3), and the annealing part (1), the upper machine head (2), and the lower machine head (3) are arranged at intervals in the height direction; The annealing part (1) has an annealing channel through which the electrode wire (100) passes. The upper machine head (2) includes a nozzle (21) with a liquid flow channel (211). The lower machine head (3) has a wiring channel. The electrode wire (100) sequentially passes through the annealing channel, the liquid flow channel (211), and the wiring channel; Among them, the annealing part (1) is used to soften the electrode wire (100); The nozzle (21) can spray a liquid column between the liquid flow channel (211) and the wiring channel; On one side of the lower machine head (3) facing the upper machine head (2), a guiding part (31) is provided. The guiding part (31) has a guiding opening (311) communicating with the wiring channel, and the guiding opening (311) is in a flared shape.
2. The automatic wire threading mechanism for the electrode wire according to claim 1, wherein Along the flowing direction of the liquid, conical surfaces (212) are arranged at intervals inside the liquid flow channel (211) to gradually reduce the diameter of the liquid flow channel (211).
3. The automatic wire threading mechanism for the electrode wire according to claim 2, characterized in that, Rectifying grooves (213) are evenly distributed on the conical surfaces (212), and the length direction of the rectifying grooves (213) is the same as the flowing direction of the liquid.
4. The automatic wire threading mechanism for the electrode wire according to claim 2, wherein A cylindrical surface (214) is arranged between two adjacent conical surfaces (212).
5. The automatic wire threading mechanism for the electrode wire according to claim 1, wherein A throttling piece (22) is detachably arranged at the liquid outlet of the liquid flow channel (211), and a throttling hole for adjusting the size of the liquid outlet is arranged on the throttling piece (22).
6. The automatic wire threading mechanism for an electrode wire according to claim 1, characterized in that, The annealing part (1) includes: Two annealing wheels (11) that can both rotate around their own axes. A gap is arranged between the two annealing wheels (11) to form the annealing channel; A cylinder, the piston rod of the cylinder is connected to one of the annealing wheels (11), and the cylinder can push the one annealing wheel (11) closer to the other annealing wheel (11) to clamp the electrode wire.
7. The automatic wire threading mechanism for the electrode wire according to claim 1, characterized in that, The guiding part (31) and the wiring end of the wiring channel are integrally formed.
8. The automatic wire threading mechanism for the electrode wire according to claim 1, characterized in that, The liquid flow channel (211), the guiding opening (311), and the wiring channel are coaxially arranged.
9. A wire electrical discharge machine for machining a mold, characterized in that, It includes: The automatic wire threading mechanism of the electrode wire according to any one of claims 1-8; A guiding wheel (200) is arranged on the downstream side of the wiring channel and is used to change the wire threading direction of the electrode wire (100); A tensioning mechanism (300) is arranged on the downstream side of the guiding wheel (200) and is used to keep the electrode wire (100) in a tensioned state; A cutting head is arranged on the downstream side of the tensioning mechanism (300) to receive the electrode wire (100), and the cutting head can cut the mold through the electrode wire (100).