A wire cutting apparatus with automatic threading function and method of using the same

Abstract

The application discloses a wire cutting equipment with automatic threading function and a use method thereof, and relates to the technical field of wire cutting machines.The wire cutting equipment comprises a wire cutting assembly for threading processing, and the wire cutting assembly comprises a base, a wire winding and unwinding part arranged on one side of the top of the base, a wire tensioning part arranged on one side of the wire winding and unwinding part, and a turning guide wheel arranged on one side of the wire tensioning part.In the threading operation, the cylinder pushes the rotating support to close the guide wheel, so that the curled, upturned and crooked end of the molybdenum wire can be automatically scraped, straightened and aligned, the curled end is prevented from blocking the conveying pipe and causing threading failure, the double guide wheels are clamped and the wire is fed in synchronization with the driving and driven gears, the feeding force is uniform, the molybdenum wire is smoothly conveyed, the threading and cutting modes are switched only by the extension and retraction stroke of the cylinder, the straightening cylinder is opened and closed in synchronization, the air blowing flow is strong and weak, the oil absorbing cotton is attached in different states, the lubricating oil circuit is connected and disconnected, the corrosion resistance and anti-interference capability are high, and the post-maintenance is simple.

Description

Technical Field

[0001] This invention relates to the field of wire cutting machine technology, and in particular to a wire cutting device with automatic wire threading function and its usage method. Background Technology

[0002] Wire EDM equipment is the core specialized equipment for electrical discharge machining of metal workpieces. It relies on the high-speed reciprocating motion of molybdenum wire to complete the workpiece forming and cutting through electrical erosion. Traditional basic wire threading mechanisms can only achieve simple clamping and conveying of molybdenum wire, which can meet the needs of simple cutting operations with small batch and low processing requirements. Wire EDM processing is often carried out in harsh working conditions filled with cutting fluid and metal dust. In addition, the end of the molybdenum wire is generally curled and curled upwards. This has put forward higher standards for the equipment's automatic straightening of the molybdenum wire end, multi-condition pure mechanical synchronous linkage, and continuous operation performance with resistance to dirt and corrosion.

[0003] In traditional wire EDM wire threading devices, the curled and upturned ends of the molybdenum wire are prone to clogging the feed tube during the wire threading process. The automatic wire threading has a low first-pass yield. Before each processing, the molybdenum wire needs to be manually ground and straightened, which increases the time of the preceding process. During the operation, the surface of the molybdenum wire is prone to adsorbing waste chips, which affects the molybdenum wire cutting work and is difficult to adapt to the production requirements of large-scale uninterrupted wire EDM processing of metal workpieces. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing wire cutting equipment with automatic wire threading function, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that the curled and upturned ends of the molybdenum wire are very easy to clog the conveying tube, the automatic wire threading has a low first pass rate, and the surface of the molybdenum wire is easy to adsorb waste chips, which affects the molybdenum wire cutting work.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wire cutting device with automatic wire threading function, comprising a wire cutting assembly for wire threading processing, including: a base, a wire take-up and release member disposed on one side of the top of the base, a wire tensioning member disposed on one side of the wire take-up and release member, a guide wheel disposed on one side of the wire tensioning member, a wire threading member disposed at the bottom of the guide wheel, a lower take-up member disposed at the bottom of the wire threading member, a lower processing table disposed at the bottom of the lower take-up member, and a wire threading auxiliary assembly disposed on the surface of the wire threading member, wherein the wire threading auxiliary assembly is used to assist in threading molybdenum wire during the wire threading process.

[0008] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the wire threading component includes: a fixed seat disposed on one side of the wire tensioning component; a wire feeding component disposed on the surface of the fixed seat; a cylinder fixed on one side of the surface of the fixed seat; a fixed support fixed on one side of the surface of the fixed seat; a rotating support rotatably connected to the other side of the surface of the fixed seat; a first tension spring fixed on the surface of the rotating support; and one end of the first tension spring fixed to the surface of the fixed seat.

[0009] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the following features are provided: a fixed guide wheel is rotatably connected to the inner cavity of the fixed base; a drive gear is fixed to one side of the fixed guide wheel; a movable guide wheel is rotatably connected to the inner cavity of the rotating support; a driven gear is fixed to one side of the movable guide wheel; an arc-shaped groove is formed around the outer ring of the movable guide wheel; a conveying pipe is fixed to the top of the fixed base; an upper guide block and a lower guide block are fixed to the top and bottom of the fixed guide wheel and the movable guide wheel, respectively; a motor is fixed to the inner cavity of the fixed base; the output end of the motor is fixed to the axis of the movable guide wheel; and a drive rod is fixed to the surface of the rotating support.

[0010] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the wire threading auxiliary component includes: a lubricating component disposed on the surface of the fixed base; a straightening and anti-vibration component disposed in the inner cavity of the upper guide block; and an air blowing component disposed on one side of the conveying pipe.

[0011] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the lubricating component includes: an oil reservoir fixed to the surface of a fixed base, an oil guide pipe connected to the bottom of one side of the fixed base, a telescopic hose connected to one end of the oil guide pipe, a miniature pressing valve fixed to the surface of the telescopic hose, and a first spring provided on the button of the miniature pressing valve.

[0012] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the air blowing component includes: an air blowing pipe, which is inclinedly disposed on the surface of the conveying pipe and its outlet extends into the inner cavity of the conveying pipe; a miniature one-way valve is fixed on the surface of the air blowing pipe; an air collecting shell is connected to the inlet end of the air blowing pipe; a piston rod is slidably and sealingly connected to the inner cavity of the air collecting shell; the bottom of the piston rod extends to the bottom of the air collecting shell; a second tension spring is sleeved on the outer ring of the piston rod; one end of the second tension spring is fixed to the inner cavity of the air collecting shell; and the other end of the second tension spring is fixed to the surface of the piston rod.

[0013] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the straightening and anti-vibration component includes: a rotating plate, which is rotatably connected to both sides of the inner cavity of the upper guide block via a rotating shaft; a torsion spring is sleeved at the axis of the rotating plate; a connecting rod is rotatably connected to the bottom of the rotating plate surface; a sliding column is sleeved between the two connecting rods; the sliding column is slidably connected to the inner cavity of the upper guide block; and a straightening cylinder is fixed to the bottom of one side of the rotating plate.

[0014] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, wherein: a mounting base is fixed to the top of one side of the rotating plate, an arc-shaped seat is provided in the inner cavity of the mounting base, oil-absorbing cotton is fixed in the inner cavity of the arc-shaped seat, and guide rods are fixed to both sides of the arc-shaped seat.

[0015] As a preferred embodiment of the wire cutting device with automatic wire threading function described in this invention, the guide rod is slidably connected to the surface of the mounting base, and a second spring is sleeved on the outer ring of the guide rod. One end of the second spring is fixed to the surface of the arc-shaped base, and the other end of the second spring is fixed to the surface of the mounting base.

[0016] As a method of using the wire cutting equipment with automatic wire threading function described in this invention, the following method is also included: molybdenum wire pre-loading: one end of the molybdenum wire is fixed to the wire take-up and unwrap member, passes through the wire tension member and the guide wheel in sequence, and is fed into the conveying pipe.

[0017] Automatic straightening and wire feeding: The start cylinder closes the moving guide wheel and the fixed guide wheel, the drive rod pushes the straightening cylinder to surround and straighten the molybdenum wire, the motor drives the gears to feed the wire in opposite directions, and the downward airflow of the air blowing component assists in guiding the wire, completing the wire threading of the entire line.

[0018] Pre-treatment cleaning: The cylinder is partially reset, the airflow is increased to clean the molybdenum wire, and the surface dust and impurities are wiped off with oil-absorbing cotton.

[0019] Cutting process: The wire take-up and unwinding component drives the molybdenum wire to reciprocate, and the workpiece is cut by electrical discharge. The straightening and anti-vibration component buffers the vibration of the molybdenum wire, and the lubricating component intermittently seeps out emulsion to continuously lubricate the molybdenum wire.

[0020] After processing is completed, the machine is stopped, the guide wheel is released, the molybdenum wire is removed, and all elastic components automatically reset.

[0021] The beneficial effects of this invention are as follows: By setting a torsion spring to drive the double-set straightening cylinders, during the wire threading operation, the cylinder pushes the rotating support to close the guide wheel, and simultaneously drives the drive rod to squeeze the rotating plate. The straightening cylinders on both sides close to form a guide channel that is wider at the top and narrower at the bottom, which can automatically scrape, straighten, and straighten the curled and upturned ends of the molybdenum wire, avoiding the curled ends from blocking the conveying pipe and causing wire threading failure. It eliminates the need for manual grinding and straightening of the molybdenum wire. With the double guide wheel clamping and feeding with the synchronously rotating active and driven gears, the feeding force is uniform, the molybdenum wire is conveyed smoothly, and the automatic wire threading rate of a single molybdenum wire is significantly improved.

[0022] The two working modes of wire threading and cutting rely solely on the switching of the cylinder's extension and retraction stroke, synchronously linking the opening and closing of the straightening cylinder, the strength of the blowing air, the adhesion of the oil-absorbing cotton, and the opening and closing of the lubrication circuit. The entire set of actions is triggered synchronously by mechanical components such as tension springs, torsion springs, cam inclined surfaces, and gears, without complex sensors or programmable modules. The equipment can still operate stably even after long-term contact with cutting fluid and metal dust, has strong corrosion resistance and anti-interference capabilities, and is simple to maintain. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural diagram of a wire cutting machine with automatic wire threading function.

[0025] Figure 2 This is a structural diagram of the wire threading component of a wire EDM machine with automatic wire threading function.

[0026] Figure 3 This is a partial structural diagram of the wire threading and feeding components of a wire EDM machine with automatic wire threading function.

[0027] Figure 4 This is a partial structural diagram of the wire threading component of a wire cutting machine with automatic wire threading function.

[0028] Figure 5 This is a rear view structural diagram of the wire threading component of a wire EDM machine with automatic wire threading function.

[0029] Figure 6 This is a diagram showing the internal structure of the upper guide block of a wire cutting machine with automatic wire threading function.

[0030] Figure 7 This is a structural diagram of the straightening and vibration prevention component for a wire cutting machine with automatic wire threading function.

[0031] Figure 8 This is a rear view structural diagram of the air blowing component of a wire cutting equipment with automatic wire threading function.

[0032] Figure 9 This is a rear sectional view of the air blowing component of a wire cutting machine with automatic wire threading function.

[0033] Figure 10 A partial structural diagram of the straightening and vibration stabilization component of a wire cutting equipment with automatic wire threading function.

[0034] In the diagram: 1. Wire EDM assembly; 11. Base; 12. Wire take-up and untake-down assembly; 13. Wire tensioning assembly; 14. Lower take-up assembly; 15. Wire threading assembly; 151. Fixed base; 152. Cylinder; 153. Rotating support; 154. Fixed support; 155. Conveying pipe; 156. Motor; 157. First tension spring; 158. Driven gear; 159. Moving guide wheel; 1591. Arc groove; 1510. Drive gear; 1511. Fixed guide wheel; 1512. Drive rod; 1513. Lower guide block; 1514. Upper guide block; 16. Lower processing table; 17. Steering guide wheel; 18. 1. Wire feeding component; 2. Wire threading auxiliary assembly; 21. Lubricating component; 211. Oil reservoir; 212. Oil guide pipe; 213. Telescopic hose; 214. Miniature push valve; 215. First spring; 22. Air blowing component; 221. Air blowing pipe; 222. Miniature one-way valve; 223. Air collecting shell; 224. Piston rod; 225. Second tension spring; 23. Straightening and anti-shaking component; 231. Turning plate; 232. Torsion spring; 233. Connecting rod; 234. Sliding column; 235. Straightening cylinder; 236. Mounting base; 237. Guide rod; 238. Second spring; 239. Arc-shaped seat; 2310. Oil-absorbing cotton. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a wire cutting device with automatic wire threading function, which mainly includes a wire cutting component 1 and a wire threading auxiliary component 2.

[0039] Specifically, the wire cutting assembly 1, used for wire threading, includes: a base 11, a wire take-up and release member 12 disposed on one side of the top of the base 11, a wire tensioning member 13 disposed on one side of the wire take-up and release member 12, a guide wheel 17 disposed on one side of the wire tensioning member 13, a wire threading member 15 disposed at the bottom of the guide wheel 17, a lower take-up member 14 disposed at the bottom of the wire threading member 15, and a lower processing table 16 disposed at the bottom of the lower take-up member 14.

[0040] Specifically, the surface of the wire threading component 15 is provided with a wire threading auxiliary component 2, which is used to assist in threading the molybdenum wire during the wire threading process.

[0041] Example 2, refer to Figures 2-10 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0042] Specifically, it also includes the wire threading component 15, which comprises: a fixed base 151, disposed on one side of the wire tensioning component 13; a wire feeding component 18 is disposed on the surface of the fixed base 151; and a cylinder 152 is fixed on one side of the surface of the fixed base 151. The total effective extension and retraction stroke of the cylinder 152 is 30mm. In automatic wire threading mode, the piston rod is fully extended, with a stroke of 0mm; in cutting mode, the piston rod retracts 15mm (half of the total stroke, positioning threshold); the cylinder 152 has a built-in magnetic ring limit switch for precise locking at 0mm. Two 15mm gears ensure consistent stroke during each switching. The standard external air supply pressure for cylinder 152 is 0.4~0.5MPa. A fixed support 154 is fixed to one side of the surface of the fixed base 151, and a rotating support 153 is rotatably connected to the other side of the surface of the fixed base 151. A first tension spring 157 is fixed to the surface of the rotating support 153. One end of the first tension spring 157 is fixed to the surface of the fixed base 151. The preload of the first tension spring 157 is 120N to ensure that the guide wheel clamps the molybdenum wire without relative slippage.

[0043] The working principles of the wire take-up and release component 12, the wire tensioning component 13, the lower take-up component 14, and the wire feeding component 18 are all existing technologies and are well known to those skilled in the art, so they will not be described in detail here.

[0044] Specifically, a fixed guide wheel 1511 is rotatably connected to the inner cavity of the fixed base 151, and a drive gear 1510 is fixed to one side of the fixed guide wheel 1511. A movable guide wheel 159 is rotatably connected to the inner cavity of the rotating support 153, and a driven gear 158 is fixed to one side of the movable guide wheel 159. The module of the drive gear 1510 and the driven gear 158 are both 0.8, and the number of teeth is 24. The transmission ratio is 1:1, and they rotate synchronously in opposite directions. An arc-shaped groove 1591 is opened around the outer ring of the movable guide wheel 159. A conveying pipe 155 is fixed to the top of the fixed base 151. The inner diameter of the conveying pipe 155 is 1.2mm, and a gap is reserved for the airflow and the passage of the molybdenum wire.

[0045] An upper guide block 1514 and a lower guide block 1513 are fixed at the top and bottom of the fixed guide wheel 1511 and the movable guide wheel 159, respectively. A motor 156 is fixed in the inner cavity of the fixed base 151. The output end of the motor 156 is fixed at the axis of the movable guide wheel 159. A drive rod 1512 is fixed on the surface of the rotating support 153. When the drive rod 1512 pushes 7mm, the straightening cylinders 235 on both sides are completely retracted. The outer rings of the fixed guide wheel 1511 and the movable guide wheel 159 are covered with a wear-resistant polyurethane anti-slip layer with a thickness of 1.2mm to increase the friction of the molybdenum wire.

[0046] Specifically, the threading auxiliary component 2 includes: a lubricant 21 disposed on the surface of the fixed base 151; a straightening and anti-vibration component 23 disposed in the inner cavity of the upper guide block 1514; and an air blowing component 22 disposed on one side of the conveying pipe 155.

[0047] Specifically, the lubricating component 21 includes: an oil reservoir 211, fixed to the surface of the fixed base 151; an oil guide pipe 212 is connected to the bottom of one side of the fixed base 151; one end of the oil guide pipe 212 is connected to a telescopic hose 213; a miniature push valve 214 is fixed to the surface of the telescopic hose 213; the single valve opening results in an oil output of 0.02~0.04ml, suitable for the micro-cooling and lubrication needs of fast wire EDM; a first spring 215 is provided on the button of the miniature push valve 214; the first spring 215 has a pre-tightening force of 45N; the valve opens only when the oil-absorbing cotton 2310 squeezes the rigid tube to produce a stroke of ≥4mm; the outlet of the telescopic hose 213 is a rigid tube structure, which passes through the arc-shaped base 239 and extends into the inner cavity of the oil-absorbing cotton 2310; four oil outlet micro-holes are circumferentially opened at the outlet of the rigid section of the telescopic hose 213.

[0048] Specifically, the air blowing component 22 includes: an air blowing pipe 221, which is inclinedly disposed on the surface of the conveying pipe 155, with its outlet extending into the inner cavity of the conveying pipe 155. The air blowing pipe 221 has an inner diameter of 4 mm and an outlet micro-hole diameter of 1.5 mm. It is inclined downward at 30° to align with the molybdenum wire travel path. A miniature one-way valve 222 is fixed on the surface of the air blowing pipe 221. The inlet end of the air blowing pipe 221 is connected to a gas collecting shell 223. A piston rod 224 is slidably and sealed to the inner cavity of the gas collecting shell 223. The piston rod 224 has a maximum reciprocating stroke of 6 mm. The opening threshold of the miniature one-way valve 222 is 0.05 MPa. The bottom of the piston rod 224 extends to the bottom of the gas collecting shell 223. A second tension spring 225 is sleeved on the outer ring of the piston rod 224. One end of the second tension spring 225 is fixed to the inner cavity of the gas collecting shell 223, and the other end of the second tension spring 225 is fixed to the surface of the piston rod 224.

[0049] Specifically, the straightening and anti-shake component 23 includes: a rotating plate 231, which is rotatably connected to both sides of the inner cavity of the upper guide block 1514 via a rotating shaft; a torsion spring 232 is sleeved at the axis of the rotating plate 231, with a torsional torque of 2.0 N·m, which keeps the straightening cylinder 235 fully open when there is no external force; a connecting rod 233 is rotatably connected to the bottom of the surface of the rotating plate 231; a sliding column 234 is sleeved between the two connecting rods 233, and the sliding column 234 is slidably connected to the inner cavity of the upper guide block 1514; a straightening cylinder 235 is fixed to the bottom of one side of the rotating plate 231; the minimum clamping diameter of the inner hole of the straightening cylinder 235 is 0.15 mm, the maximum opening gap is 0.5 mm, the cone angle of the conical inclined surface of the inner wall of the straightening cylinder 235 is 15°, the inlet width is 1 mm, and the outlet width is 0.22 mm, which is suitable for molybdenum wire guidance; and a wear-resistant PU bushing is inlaid on the inner wall of the straightening cylinder 235 to avoid scratching the surface of the molybdenum wire.

[0050] Specifically, a mounting base 236 is fixed to the top of one side of the rotating plate 231. An arc-shaped seat 239 is provided in the inner cavity of the mounting base 236. An oil-absorbing cotton 2310 is fixed in the inner cavity of the arc-shaped seat 239. Guide rods 237 are fixed on both sides of the arc-shaped seat 239.

[0051] Specifically, the guide rod 237 is slidably connected to the surface of the mounting base 236, and the outer ring of the guide rod 237 is fitted with a second spring 238. One end of the second spring 238 is fixed to the surface of the arc-shaped seat 239, and the other end of the second spring 238 is fixed to the surface of the mounting base 236. The second spring 238 has a spring force of 60N, which ensures that the oil-absorbing cotton 2310 continuously adheres to the molybdenum wire and buffers vibration.

[0052] Example 3, referring to Figures 2-10 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, the bottom of the gas collecting shell 223 is provided with a micro-hole for venting, one end of the torsion spring 232 is fixed to the surface of the rotating plate 231, and the other end of the torsion spring 232 is fixed to the inner wall of the upper guide block 1514.

[0054] Specifically, the bottom of the piston rod 224 is provided with a smooth arc surface, which is aligned with the surface of the arc groove 1591. A pressure plate is fixed on the top of the mounting base 236. The position of the pressure plate corresponds to the button of the micro push valve 214 and is used to squeeze the button.

[0055] Furthermore, the first tension spring 157, the first spring 215, the second tension spring 225, the second spring 238, and the torsion spring 232 are all made of 65Mn spring steel with galvanized passivation, which is moisture-resistant and rust-proof. The conveying pipe 155 and the air blowing pipe 221 are both oil-resistant PVC pipes. The telescopic hose 213 is a corrugated corrosion-resistant rubber hose.

[0056] Furthermore, this equipment is compatible with common molybdenum wire specifications for fast wire EDM: 0.16mm, 0.18mm, and 0.20mm; the straightening cylinder 235 and the conveying tube 155 are sized to match the above three types of molybdenum wire.

[0057] Furthermore, the base 11, fixed seat 151, upper guide block 1514, lower guide block 1513, straightening cylinder 235, driving gear 1510, driven gear 158, and piston rod 224 are all made of 45# steel with heat treatment and hard anodizing to resist cutting fluid corrosion. Each sliding friction pair is embedded with graphite self-lubricating copper sleeves. The PU bushing inside the straightening cylinder 235 has a snap-on detachable structure. After wear, the inner bushing can be replaced separately without replacing the entire rotating plate 231 assembly.

[0058] It should be noted that the specific working logic of the dual-mode pure mechanical synchronous linkage is as follows: Automatic wire threading mode (cylinder 152 push rod fully extended, stroke 0mm), cylinder 152 push rod pushes forward to rotate support 153, stretches first tension spring 157, moves guide wheel 159 to fit against fixed guide wheel 1511, gear meshing synchronously feeds wire, drive rod 1512 pushes rotating plate 231 forward, overcomes the torque of torsion spring 232 to make the straightening cylinders 235 on both sides retract, completing the straightening of molybdenum wire end, arc groove 1591 slightly pushes piston rod 224, outputs 0.08~0.12MPa continuous low-pressure airflow to pull molybdenum wire down, rotating plate 231 drives pressure plate away from micro-press valve 214, lubrication oil circuit remains closed, oil absorbent cotton 2310 detaches from molybdenum wire surface, all actions rely on the stroke synchronous triggering of a single cylinder 152, without the participation of electrical control components.

[0059] During the cutting process (cylinder 152 push rod retracts 15mm, half stroke), cylinder 152 push rod is half retracted, first tension spring 157 rebounds slightly, moving guide wheel 159 is slightly raised, gears continuously mesh to ensure uninterrupted wire feeding, drive rod 1512 disengages from rotating plate 231, torsion spring 232 rebounds to open straightening cylinder 235 to release molybdenum wire, arc groove 1591 increases piston rod 224 reciprocating stroke, outputs 0.25~0.35MPa pulse high-pressure airflow to remove chips, rotating plate 231 resets and drives pressure plate to press down micro-press valve 214, oil circuit is intermittently opened, second spring 238 pushes oil-absorbing cotton 2310 to continuously adhere to molybdenum wire, achieving synchronous cooling and lubrication.

[0060] How to use a wire cutting machine with automatic wire threading function: Check the wire cutting assembly 1 as a whole, place the base 11 horizontally and stably, clean the metal scrap on the surface of the lower processing table 16, check that the oil tank 211 has sufficient lubricating oil, and connect the external air supply pipe to the air inlet of the air collection shell 223 of the air blowing component 22.

[0061] Check each elastic component one by one: first tension spring 157, second tension spring 225, torsion spring 232, first spring 215, and second spring 238 are free from breakage and deformation. Confirm that the power supply lines of cylinder 152 and motor 156 are connected normally. Place the metal workpiece to be cut stably on the lower processing table 16 and lock it in place with tooling fixtures to ensure that the workpiece does not shift or loosen during the cutting process.

[0062] Take out the molybdenum wire raw material roll, fix one end of the molybdenum wire and wind it around the take-up drum of the wire take-up and unwinding part 12, pull out a section of molybdenum wire, and guide the molybdenum wire through the guide wheel and tension wheel inside the wire tensioning part 13 in sequence. Rely on the wire tensioning part 13 to pre-tighten the molybdenum wire to eliminate the problem of wire slack and sagging. Continue to pull the molybdenum wire upward and around the steering guide wheel 17, and feed it vertically downward into the conveying pipe 155 at the top of the wire threading part 15. Insert the end of the molybdenum wire slightly into the pipe and wait for the automatic wire feeding mechanism to start.

[0063] Start the equipment control system and start the motor 156 to run. The output end of the motor 156 drives the driving gear 1510 and the fixed guide wheel 1511 to rotate continuously. The synchronous control cylinder 152 extends forward and pushes the rotating support 153 to rotate inward, stretching the first tension spring 157. This drives the moving guide wheel 159 and the driven gear 158 to engage with the fixed guide wheel 1511, and the two sets of gears mesh with each other for transmission.

[0064] The drive rod 1512 on the rotating support 153 rotates synchronously, squeezing the rotating plate 231 in the inner cavity of the upper guide block 1514. The rotating plate 231 deflects against the torque of the torsion spring 232, and the straightening cylinders 235 on both sides converge inward to form a tapered guide channel that is wider at the top and narrower at the bottom. When the molybdenum wire falls vertically through the straightening cylinder 235, the inner wall of the cylinder scrapes and straightens the curled and upturned ends of the molybdenum wire, completing the pre-straightening and preventing the bent ends from blocking the internal channel of the conveying pipe 155.

[0065] The arc-shaped groove 1591 on the outer ring of the moving guide wheel 159 rotates continuously with the wheel body, repeatedly pressing the piston rod 224 at the bottom of the gas collecting shell 223. The piston rod 224 compresses the air inside the shell upward, and the gas pushes open the miniature one-way valve 222, and enters the delivery pipe 155 downward along the inclined air blowing pipe 221, forming a downward airflow that pulls the molybdenum wire to fall at a uniform speed. The low-pressure airflow in the wire threading mode is 0.08~0.12MPa, and the flow is continuous and stable.

[0066] After straightening, the molybdenum wire enters between the fixed guide wheel 1511 and the moving guide wheel 159. The two sets of guide wheels rotating in opposite directions squeeze and push the molybdenum wire downward. The molybdenum wire passes through the lower guide block 1513 and is conveyed to the lower take-up part 14 via the wire feeding part 18. After the molybdenum wire passes completely through the lower take-up part 14, it is wound back upward. The end of the molybdenum wire is manually fixed to the bottom drum of the wire take-up and unwinding part 12 to form a closed molybdenum wire circuit. The automatic wire threading process is completed.

[0067] When the extension end of the control cylinder 152 retracts half its stroke, the moving guide wheel 159 is raised, and the arc groove 1591 increases the pushing stroke of the piston rod 224. The piston rod 224 moves up and down significantly, and the air collecting shell 223 outputs a 0.25~0.35MPa pulsed high-pressure airflow with a pulse reciprocating frequency of 25~35 times / minute, continuously flushing away metal debris on the surface of the molybdenum wire. The first tension spring 157 rebounds and pulls the rotating support 153 back slightly, and the moving guide wheel 159 is raised slightly. The driven gear 158 remains engaged with the driving gear 1510. After the moving guide wheel 159 is raised, the pushing stroke of the arc groove 1591 on the piston rod 224 increases, and the piston rod 224 moves up and down significantly. The air collecting shell 223 outputs a high-speed airflow to flush away dust and metal debris on the surface of the molybdenum wire.

[0068] The drive rod 1512 moves backward with the rotating support 153, disengaging from the rotating plate 231. The torsion spring 232 rebounds, causing the rotating plate 231 to return to its original position. The straightening cylinder 235 opens to release the molybdenum wire. The mounting seat 236 on the top of the rotating plate 231 moves inward. The oil-absorbing cotton 2310 inside the arc-shaped seat 239 adheres to the outer wall of the molybdenum wire, wiping away residual impurities.

[0069] The built-in winding motor of the wire take-up and unwinding component 12 is started, and the upper and lower drums operate synchronously. The molybdenum wire moves vertically and reciprocally at high speed between the wire threading component 15 and the lower take-up component 14. When the high-frequency pulse power supply is turned on, an electric spark is generated between the molybdenum wire and the workpiece. The outline of the workpiece on the lower processing table 16 is cut by the electro-erosion action.

[0070] Automatic anti-vibration and lubrication during processing: The high-speed reciprocating motion of the molybdenum wire generates high-frequency vibration. When the molybdenum wire touches the rigid tube section at the front end of the telescopic hose 213, the rigid tube buffers and absorbs the vibration, improving the cutting dimension accuracy. The rigid tube simultaneously squeezes the micro-press valve 214, compressing the first spring 215, and the valve opens intermittently.

[0071] The lubricating oil in the oil reservoir 211 flows into the telescopic hose 213 through the oil guide pipe 212, and seeps into the oil-absorbing cotton 2310 through the oil outlet micropores on the pipe wall, continuously applying emulsified lubricant to the molybdenum wire, cooling and lubricating the molybdenum wire in real time, reducing the probability of wire breakage at high temperature. The guide rod 237, together with the second spring 238, keeps the oil-absorbing cotton 2310 in flexible contact with the molybdenum wire at all times.

[0072] After the workpiece is cut and shaped, the high-frequency pulse power supply is cut off, the winding motor of the wire take-up and unwinding part 12 is turned off, the molybdenum wire stops reciprocating, the control cylinder 152 is fully retracted, the first tension spring 157 is fully rebounded, the moving guide wheel 159 moves away from the fixed guide wheel 1511, the gear disengages, the molybdenum wire clamp is released, the fixed points at both ends of the molybdenum wire are manually cut off, the molybdenum wire is completely pulled out, the metal powder on the surface of the oil-absorbing cotton 2310 is cleaned, and the cutting waste on the lower processing table 16 is cleaned.

[0073] Automatic reset of each component: The piston rod 224 falls back under the pull of the second tension spring 225, the rotating plate 231 and the straightening cylinder 235 return to the open state, the micro-press valve 214 closes under the action of the first spring 215, shutting off the external air supply and the main power supply of the whole machine, and all components return to the initial standby state, waiting for the next batch of processing.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wire cutting device with automatic wire threading function, characterized in that: The device includes a wire cutting assembly (1) for wire threading, comprising: a base (11), a wire take-up and release member (12) provided on one side of the top of the base (11), a wire tensioning member (13) provided on one side of the wire take-up and release member (12), a guide wheel (17) provided on one side of the wire tensioning member (13), a wire threading member (15) provided at the bottom of the guide wheel (17), a lower take-up member (14) provided at the bottom of the wire threading member (15), a lower processing table (16) provided at the bottom of the lower take-up member (14), and a wire threading auxiliary assembly (2) provided on the surface of the wire threading member (15), wherein the wire threading auxiliary assembly (2) is used to assist in threading the molybdenum wire during the wire threading process.

2. The wire cutting equipment with automatic wire threading function as described in claim 1, characterized in that: The threading component (15) includes: a fixed seat (151) disposed on one side of the thread tensioning component (13), a thread feeding component (18) disposed on the surface of the fixed seat (151), a cylinder (152) fixed on one side of the surface of the fixed seat (151), a fixed support (154) fixed on one side of the surface of the fixed seat (151), a rotating support (153) rotatably connected to the other side of the surface of the fixed seat (151), a first tension spring (157) fixed on the surface of the rotating support (153), and one end of the first tension spring (157) fixed to the surface of the fixed seat (151).

3. The wire cutting equipment with automatic wire threading function as described in claim 2, characterized in that: The inner cavity of the fixed base (151) is rotatably connected to a fixed guide wheel (1511), and a driving gear (1510) is fixed on one side of the fixed guide wheel (1511). The inner cavity of the rotating support (153) is rotatably connected to a moving guide wheel (159), and a driven gear (158) is fixed on one side of the moving guide wheel (159). An arc groove (1591) is opened around the outer ring of the moving guide wheel (159). A conveying pipe (155) is fixed on the top of the fixed base (151). An upper guide block (1514) and a lower guide block (1513) are fixed at the top and bottom of the fixed guide wheel (1511) and the moving guide wheel (159), respectively. A motor (156) is fixed in the inner cavity of the fixed base (151). The output end of the motor (156) is fixed at the axis of the moving guide wheel (159). A drive rod (1512) is fixed on the surface of the rotating support (153).

4. The wire cutting equipment with automatic wire threading function as described in claim 3, characterized in that: The threading auxiliary component (2) includes: a lubricant (21) disposed on the surface of the fixed base (151), a straightening and anti-shaking component (23) disposed in the inner cavity of the upper guide block (1514), and an air blowing component (22) disposed on one side of the conveying pipe (155).

5. The wire cutting equipment with automatic wire threading function as described in claim 4, characterized in that: The lubricating component (21) includes: an oil reservoir (211) fixed to the surface of a fixed base (151), an oil guide pipe (212) connected to the bottom of one side of the fixed base (151), a telescopic hose (213) connected to one end of the oil guide pipe (212), a miniature push valve (214) fixed to the surface of the telescopic hose (213), and a first spring (215) provided on the button of the miniature push valve (214).

6. The wire cutting equipment with automatic wire threading function as described in claim 4, characterized in that: The air blowing component (22) includes: an air blowing pipe (221) inclinedly disposed on the surface of the conveying pipe (155), the outlet of which extends to the inner cavity of the conveying pipe (155), a miniature one-way valve (222) fixed on the surface of the air blowing pipe (221), an air collecting shell (223) connected to the inlet end of the air blowing pipe (221), a piston rod (224) slidably and sealedly connected to the inner cavity of the air collecting shell (223), the bottom of the piston rod (224) penetrating to the bottom of the air collecting shell (223), a second tension spring (225) sleeved on the outer ring of the piston rod (224), one end of the second tension spring (225) fixed to the inner cavity of the air collecting shell (223), and the other end of the second tension spring (225) fixed to the surface of the piston rod (224).

7. The wire cutting equipment with automatic wire threading function as described in claim 4, characterized in that: The straightening and anti-shake component (23) includes: a rotating plate (231), which is rotatably connected to both sides of the inner cavity of the upper guide block (1514) via a rotating shaft. A torsion spring (232) is sleeved at the axis of the rotating plate (231). A connecting rod (233) is rotatably connected to the bottom of the surface of the rotating plate (231). A sliding column (234) is sleeved between the two connecting rods (233). The sliding column (234) is slidably connected to the inner cavity of the upper guide block (1514). A straightening cylinder (235) is fixed to the bottom of one side of the rotating plate (231).

8. The wire cutting equipment with automatic wire threading function as described in claim 7, characterized in that: A mounting base (236) is fixed to the top of one side of the rotating plate (231). An arc-shaped seat (239) is provided in the inner cavity of the mounting base (236). An oil-absorbing cotton (2310) is fixed in the inner cavity of the arc-shaped seat (239). Guide rods (237) are fixed on both sides of the arc-shaped seat (239).

9. The wire cutting equipment with automatic wire threading function as described in claim 8, characterized in that: The guide rod (237) is slidably connected to the surface of the mounting base (236). The outer ring of the guide rod (237) is fitted with a second spring (238). One end of the second spring (238) is fixed to the surface of the arc-shaped seat (239), and the other end of the second spring (238) is fixed to the surface of the mounting base (236).

10. A method of using a wire cutting device with automatic wire threading function, characterized in that: The wire cutting equipment with automatic wire threading function as described in any one of claims 1-9 further includes the following method of use: Molybdenum wire pre-loading: One end of the molybdenum wire is fixed to the wire take-up and release component (12), passes through the wire tensioning component (13) and the guide wheel (17) in sequence, and is fed into the conveying pipe (155). Automatic straightening and wire feeding: The start cylinder (152) closes the moving guide wheel (159) and the fixed guide wheel (1511), the drive rod (1512) pushes the straightening cylinder (235) to surround and straighten the molybdenum wire, the motor (156) drives the gears to feed the wire in opposite directions, and the air blowing component (22) assists the wire guide with downward airflow to complete the wire feeding of the entire line; Cleaning pretreatment: The cylinder (152) is partially reset, the airflow is increased to clean the molybdenum wire, and the oil-absorbing cotton (2310) is used to wipe the surface dust and impurities; Cutting process: The wire take-up and untake-down component (12) drives the molybdenum wire to reciprocate and cut the workpiece by electrical discharge; the straightening and anti-vibration component (23) buffers the vibration of the molybdenum wire; and the lubricating component (21) intermittently seeps out emulsion to continuously lubricate the molybdenum wire. After processing is completed, the machine is stopped, the guide wheel is released, the molybdenum wire is removed, and all elastic components automatically reset.

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