An automatic wire threading cutting machine

Abstract

The application discloses an automatic wire threading cutting machine and belongs to the field of wire cutting equipment. The automatic wire threading cutting machine comprises a rack, a wire source device, a lifting device, a wire threading device, an upper wire guide, a sleeve and a sensor, the wire source device, the lifting device and the wire threading device are installed on the rack, the upper wire guide is installed on the lifting device, the sleeve is sleeved on the upper wire guide in a lifting manner, the sensor is arranged at a position matched with the sleeve, and the lifting device is used for driving the upper wire guide and the sleeve to lift. When the lifting device makes the distance between the end of the upper wire guide and the workpiece reach a preset distance, the sleeve is connected with the workpiece, and the sensor is triggered. The application detects the position of the upper wire guide and the workpiece in the case that the upper wire guide is not connected with the workpiece by cooperation of the sensor and the sleeve, reduces the probability that the bottom of the eye mold installed on the upper wire guide deviates, and solves the problem that the existing technology is prone to deviation of the eye mold, thereby reducing the precision of automatic wire threading wire cutting.

Description

Technical Field

[0001] This invention belongs to the technical field of wire cutting equipment, specifically an automatic wire cutting machine. Background Technology

[0002] In the existing technology, the automatic wire EDM machine needs to ensure the positioning accuracy of the electrode wire by using the eye mold close to the workpiece through the wire guide to ensure the accuracy of wire EDM. However, in the automatic wire EDM process, the wire guide and the workpiece have multiple rigid contacts, which can easily cause the eye mold to shift, resulting in a decrease in the accuracy of automatic wire EDM. Summary of the Invention

[0003] Purpose of the invention: To provide an automatic wire cutting machine that uses a liftable sleeve outside the upper wire guide to contact the workpiece during automatic wire cutting, eliminating the need for the upper wire guide to contact the workpiece. This reduces the probability of misalignment at the part of the upper wire guide where the eye mold is installed, and solves the problem in the prior art where eye mold misalignment easily leads to reduced accuracy in automatic wire cutting.

[0004] The technical solution of the present invention is as follows: an automatic wire cutting machine includes: a frame, a wire source device, a lifting device, a wire threading device, an upper wire guide, a sleeve, and a sensor.

[0005] The yarn source device, lifting device, and yarn threading device are mounted on the frame. The upper yarn guide is mounted on the lifting device. The sleeve is jackingly fitted onto the upper yarn guide. The sensor is positioned to engage with the sleeve. The lifting device is used to drive the upper yarn guide and the sleeve to move up and down.

[0006] When the lifting device brings the distance between the end of the upper guide wire and the workpiece to a preset distance, the sleeve connects with the workpiece, triggering the sensor.

[0007] In a further embodiment, the automatic wire cutting machine further includes a positioning spring, which is disposed above the sleeve. The positioning spring is used to apply a downward force to the sleeve. The positioning spring can maintain a certain pressure between the sleeve and the workpiece, thus ensuring the stability of the wire-blocking channel.

[0008] In a further embodiment, the sleeve is provided with a wire-blocking channel below the upper wire guide. The wire-blocking channel can reduce the open gap between the upper wire guide and the workpiece when the upper surface of the wire threading part of the workpiece is a sloping structure, thereby confining the electrode wire within the wire-blocking channel and improving the wire threading success rate.

[0009] In a further embodiment, the automatic wire cutting machine further includes: a material blocking power mechanism and a material blocking component, wherein the material blocking component is installed on the material blocking power mechanism.

[0010] The wire threading device is provided with an electrode wire channel through which the electrode wire can pass, and the material blocking power mechanism is used to make the material blocking component block above or away from the electrode wire channel.

[0011] When the stopper moves to a position above the electrode wire channel, it blocks the falling waste and cut parts above the electrode wire channel. The stopper is moved above the electrode wire channel of the lower head by the stopper power mechanism. When waste and cut parts are generated during wire cutting, the waste and cut parts falling from above the electrode wire channel fall onto the stopper, preventing the waste and cut parts from contacting the electrode wire channel. This solves the problem in the prior art that the waste and cut parts are prone to hitting the part of the lower head where the electrode wire channel is located during the falling process, resulting in a low wire threading success rate after the wire cutting machine has been working for a long time.

[0012] In a further embodiment, the material-blocking power mechanism includes a rotary power source, the material-blocking component is mounted on the rotary power source, the rotary power source is used to drive the material-blocking component to rotate, so that the material-blocking component moves between a side position and an upper position of the electrode wire channel. The rotation of the material-blocking component can tilt the waste material above the material-blocking component to the side position of the electrode wire channel. It can also use the rotation of the material-blocking component after wire cutting to push the waste material accumulated in the part of the lower head not covered by the material-blocking component away from the electrode wire channel, further reducing the impact of the accumulation of waste material on the lower head.

[0013] In a further embodiment, the automatic wire cutting machine also includes: a fixed wire guide, multiple movable wire guides, and a wire guiding power mechanism.

[0014] The fixed guide wire component is provided with a first electrode wire channel through which the electrode wire can pass. The movable guide wire component is installed on the guide wire power mechanism, which is used to drive multiple movable guide wire components to descend or rise.

[0015] When the guide wire power mechanism drives multiple movable guide wire components to descend, the multiple movable guide wire components move away from the electrode wire.

[0016] When the wire guide power mechanism drives multiple movable wire guides to rise, these movable wire guides move towards the electrode wire to form a second electrode wire channel through which the electrode wire can pass. The movable wire guides can move away from or towards the electrode wire. Only when wire threading is required is the wire guide power mechanism driving the multiple movable wire guides to rise, simultaneously forming the second electrode wire channel by moving them towards the electrode wire. When not threading, the multiple movable wire guides open into an open structure, preventing the formation of the second electrode wire channel. This allows the movable wire guides to avoid the fixed wire guide during descent, eliminating the need for the fixed wire guide to contain the movable wire guide. This allows the movable wire guide to move up and down between the fixed wire guide and the workpiece without requiring the fixed wire guide to contain it. Both the movable and fixed wire guides can use electrode wire channels with smaller inner diameters. This solves the problem in existing technologies where the fixed wire guide tube must contain the movable wire guide tube to achieve the ability for the movable wire guide tube to move up and down between the fixed wire guide tube and the workpiece, resulting in a high wire threading failure rate.

[0017] In a further embodiment, the automatic wire cutting machine also includes a top cover.

[0018] The upper cover is installed on the wire guide power mechanism and is located above the movable wire guide. The wire guide power mechanism is used to drive the upper cover to descend or rise.

[0019] When the multiple movable wire guides move away from the electrode wire, the sidewalls of the multiple movable wire guides used to form the second electrode wire channel are located below the upper cover. The upper cover can further prevent cutting waste from falling on the sidewalls of the movable wire guides used to form the second electrode wire channel, thus avoiding the problem of cutting waste obstructing the movable wire guides from forming the second electrode wire channel.

[0020] In a further embodiment, the automatic wire cutting machine further includes a lifting wire guide, which has a third electrode wire channel through which the electrode wire can pass.

[0021] The lifting wire guide is installed on the wire guide power mechanism. The lifting wire guide is positioned above the movable wire guide. The outer diameter of the lifting wire guide is smaller than the outer diameter of the multiple movable wire guides when forming the second electrode wire channel. The wire guide power mechanism is used to drive the lifting wire guide to descend or ascend.

[0022] When multiple movable wire guides form a second electrode wire channel, the electrode wires sequentially pass through the machining holes of the workpiece and then sequentially pass through the third electrode wire channel, the second wire threading channel, and the first wire threading channel. The lifting wire guide rises or falls together with the movable wire guides, and the outer diameter of the lifting wire guide is smaller than the outer diameter when multiple movable wire guides form the second electrode wire channel. When there is a groove structure below the workpiece and the outer diameter of multiple movable wire guides is too large to extend into the groove structure, the lifting wire guide can be extended into the groove structure to perform wire threading.

[0023] In a further embodiment, the automatic wire cutting machine further includes a detection plate and a detection power mechanism, both of which are installed on the wire cutting machine's wire threading device.

[0024] The wire threading device is equipped with a wire threading tube, and the wire threading tube has a guide channel for the electrode wire to pass through. The detection plate is movably inserted into the guide channel, and the detection plate is used to connect to the electrical control system of the wire cutting machine.

[0025] The detection power mechanism is connected to the detection plate and is used to drive the detection plate to reciprocate between a detection position that can detect the position of the electrode wire end in the guide channel and a yielding position that does not obstruct the passage of the electrode wire. The detection plate is movably inserted in the guide channel of the wire-threading tube. The detection plate can reciprocate between the detection position and the yielding position under the action of the detection power mechanism. When the detection plate moves to the detection position, the detection plate can detect and position the position of the electrode wire end in the wire-threading tube in cooperation with the wire cutting machine's electrical control system. After the detection is completed, the detection plate can move to the yielding position to allow the electrode wire to pass normally, so that the end of the electrode wire can be accurately delivered to the predetermined clamping position. This solves the problem that the existing technology cannot accurately position the wire end in the wire-threading tube, which makes it difficult to ensure that the end of the electrode wire is accurately delivered to the predetermined clamping position.

[0026] In a further embodiment, the wire source device includes: a wire winding spool, clamping plates, a pressing mechanism, and a separating mechanism.

[0027] The clamp is installed on the outer wall of the winding cylinder and can reciprocate in the direction of approaching or moving away from the outer wall of the winding cylinder, so that the clamp has a pressed state that is tightly pressed against the outer wall of the winding cylinder and a separated state that is separated from the outer wall of the winding cylinder by a certain distance.

[0028] The pressing mechanism is used to apply a force to the clamping piece to bring it closer to the outer wall of the winding cylinder.

[0029] The separation mechanism is used to apply a force to the clamp to move it away from the outer wall of the winding drum.

[0030] The clamping plate can automatically switch between the pressing and separating states under the action of the pressing and separating mechanisms. Compared with the prior art of using the wire threading tube to impact the clamping plate to open it, the automatic switching of the clamping plate between the pressing and separating states by the pressing and separating mechanisms can avoid collision or squeezing between the wire threading device and the clamping plate, reduce the wear of the wire threading device and the clamping plate, and ensure the wire feeding and clamping effects. Moreover, the outer wall of the winding drum can be equipped with only the clamping plate, which effectively reduces the eccentricity of the automatic wire clamping device.

[0031] The beneficial effects of this invention are as follows: By sleeved on the upper wire guide, the electrode wire on the wire source device can be connected to the workpiece before it needs to move from the upper wire guide through the workpiece towards the wire threading device. By using the cooperation of the sensor and the sleeve, the position of the upper wire guide and the workpiece can be detected even when the upper wire guide is not connected. During the detection process, the sleeve can be raised under force, which reduces the probability of the bottom of the upper wire guide with the eye mold being installed shifts, ensuring the positioning accuracy of the electrode wire, and thus ensuring the accuracy of automatic wire threading and wire EDM. This solves the problem in the prior art where the eye mold shifts, leading to a decrease in the accuracy of automatic wire EDM. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall isometric structure of the present invention.

[0033] Figure 2 yes Figure 1 A magnified view of part A.

[0034] Figure 3 This is a schematic diagram of the combined structure of the upper guide wire, sleeve, sensor, and positioning spring of the present invention.

[0035] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point B.

[0036] Figure 5 This is an isometric structural diagram of the material-blocking power mechanism and the material-blocking component cooperating with the wire-threading device of the present invention.

[0037] Figure 6 This is an isometric structural schematic diagram of an embodiment of the present invention in which multiple movable guide wires form a second electrode wire channel.

[0038] Figure 7 This is a schematic diagram of the internal structure of an embodiment of the present invention in which multiple movable guide wires form a second electrode wire channel.

[0039] Figure 8 This is a schematic diagram of the internal structure of an embodiment of the present invention in which multiple movable guide wires are opened into an open structure to avoid the fixed guide wires.

[0040] Figure 9 This is an isometric structural diagram of an embodiment of the present invention, which includes an upper cover and a lifting guide wire component.

[0041] Figure 10 This is a schematic diagram of the internal structure of the threading device of the present invention.

[0042] Figure 11 This is a cross-sectional structural diagram of the detection plate and detection power mechanism of the present invention.

[0043] Figure 12 This is an isometric structural diagram of an embodiment of the wire source device of the present invention, which includes a wire winding drum, clamping plates, a pressing mechanism, and a separating mechanism.

[0044] The attached figures are labeled as follows: 1. Frame; 2. Wire source device; 21. Winding spool; 22. Clamping plate; 23. Pressing mechanism; 24. Separating mechanism; 3. Lifting device; 4. Wire threading device; 41. Wire threading tube; 42. Wire threading power mechanism; 5. Sleeve; 51. Sensing part; 52. Positioning spring; 53. Wire blocking channel; 6. Sensor; 7. Upper wire guide; 8. Material blocking power mechanism; 9. Material blocking part; 10. Fixed wire guide; 11. Movable wire guide; 12. Wire guiding power mechanism; 12. Lifting power source; 121. Mounting base; 122. Unlocking part; 123. Wire guide spring; 124. Top cover; 13. Lifting wire guide; 14. Detection plate; 15. Yielding hole; 151. Detection power mechanism; 16. Detection guide; 161. Detection moving part; 162. Detection spring; 163. Detection push plate; 164. Detailed Implementation

[0045] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0046] This application discloses an automatic wire cutting machine with a PLC and other control devices. The power sources such as motors and sensors of each device are connected to the control devices, which control the devices to work together. The automatic wire cutting machine has a liftable sleeve installed outside the upper wire guide. During the automatic wire cutting process, the liftable sleeve contacts the workpiece, and the upper wire guide does not need to contact the workpiece. This reduces the probability of misalignment at the part of the upper wire guide where the eye mold is installed, and solves the problem in the prior art that the misalignment of the eye mold easily leads to a decrease in the accuracy of automatic wire cutting.

[0047] like Figure 1The automatic wire cutting machine shown is a molybdenum wire cutting machine that includes a tensioning device and a wire source device 2 including a wire winding spool 21. In other embodiments, the automatic wire cutting machine can also be a copper wire cutting machine or a dual-path wire cutting machine.

[0048] like Figure 1 The automatic wire cutting machine shown includes: frame 1, wire source device 2, lifting device 3, wire threading device 4, upper wire guide 7, sleeve 5, and sensor 6.

[0049] The silk source device 2, lifting device 3, and silk threading device 4 are installed on the frame 1, such as Figure 2 The upper wire guide 7 is mounted on the lifting device 3. The sleeve 5 is movably fitted onto the upper wire guide 7. The sensor 6 is positioned to mate with the sleeve 5. The lifting device 3 is used to move the upper wire guide 7 and the sleeve 5 up and down. The bottom of the electrode wire channel of the upper wire guide 7 is provided with a wire guide eye mold. The sensor 6 is a position sensor 6. The sensor 6 can be mounted on the frame 1 of the wire cutting machine, the lifting device 3, or the upper wire guide 7. When the distance between the sensor 6 and the sleeve 5 reaches a preset distance, the sensor 6 is triggered, or as shown... Figure 2 As shown, sensor 6 is installed on sleeve 5. When the distance between sensor 6 and lifting device 3 or upper guide wire 7 reaches a preset distance, sensor 6 is triggered.

[0050] When the lifting device 3 makes the distance between the end of the upper guide wire 7 and the workpiece reach the preset distance, the sleeve 5 connects with the workpiece, triggering the sensor 6.

[0051] The lifting device 3 is existing technology. It is equipped with a wire feeding device so that the electrode wire can pass through the upper wire guide 7, the wire blocking channel 53, the workpiece machining hole, the third electrode wire channel, the second wire threading channel, the first wire threading channel and the wire threading device 4 and then move to the position that cooperates with the wire source device 2.

[0052] like Figure 3 The automatic wire cutting machine shown also includes a positioning spring 52, which is located above the sleeve 5 and is used to apply a downward force to the sleeve 5.

[0053] like Figure 3 The sleeve 5 shown is provided with a sensing part 51 and a limiting seat. The limiting seat is installed on the upper machine head or the upper wire guide 7. The positioning spring 52 and the end of the sleeve 5 are set in the limiting seat. The limiting seat is provided with an elongated hole. The sensing part 51 extends through the elongated hole to the position where it cooperates with the sensor 6. The elongated hole is used to circumferentially limit the sensing part 51. When the distance between the end of the upper wire guide 7 and the workpiece reaches a preset distance, the sleeve 5 drives the sensing part 51 to move to the position where the sensor 6 is triggered.

[0054] like Figure 4 The sleeve 5 shown has a wire-blocking channel 53 surrounding the upper wire guide 7.

[0055] like Figure 5 The automatic wire cutting machine shown also includes: a material blocking power mechanism 8 and a material blocking component 9, with the material blocking component 9 installed on the material blocking power mechanism 8.

[0056] The wire threading device 4 is provided with an electrode wire channel through which the electrode wire can pass, and the material blocking power mechanism 8 is used to make the material blocking member 9 block above or away from the electrode wire channel.

[0057] When the baffle 9 moves to the position above the electrode wire channel, the baffle 9 is used to block the falling of waste material and cut parts above the electrode wire channel.

[0058] The baffle 9 is provided with a groove. When the baffle 9 moves to the position above the electrode wire channel, the electrode wire passes through the groove of the baffle 9. The groove allows the baffle 9 to avoid the electrode wire and prevent the waste material above the electrode wire channel from falling without interfering with the operation of the electrode wire. In a preferred embodiment, the width and length of the baffle 9 are greater than the maximum value of the inner diameter of the electrode wire channel, so that the baffle 9 can prevent the waste material above the electrode wire channel from falling.

[0059] like Figure 5 The shown material blocking power mechanism 8 includes: a rotary power source, a material blocking component 9 mounted on the rotary power source, and the rotary power source is used to drive the material blocking component 9 to rotate, so that the material blocking component 9 can move between the side position and the top position of the electrode wire channel.

[0060] like Figure 5 The wire threading device 4 shown is located at one end below the lifting device 3, where a lower die head is provided. The lower die head has an electrode wire channel, and the material blocking power mechanism 8 can be used as follows: Figure 5 The device shown can be installed on the lower die head or on the threading device 4 or the frame 1. In embodiments where the threading device 4 does not have a lower die head, the material blocking power mechanism 8 can be installed on the threading device 4 or the frame 1.

[0061] like Figure 6-8 The automatic wire cutting machine shown also includes: a fixed wire guide 10, multiple movable wire guides 11, and a wire guide power mechanism 12.

[0062] The fixed wire guide 10 is provided with a first electrode wire channel through which the electrode wire can pass. The movable wire guide 11 is installed on the wire guide power mechanism 12, which is used to drive multiple movable wire guides 11 to descend or rise.

[0063] When the wire guide power mechanism 12 drives multiple movable wire guide elements 11 to descend, it causes the multiple movable wire guide elements 11 to move away from the electrode wire.

[0064] When the wire guide power mechanism 12 drives multiple movable wire guides 11 to rise, the multiple movable wire guides 11 move towards the direction of the electrode wire to form a second electrode wire channel through which the electrode wire can pass.

[0065] The first electrode wire channel is provided with a wire guide eye mold at the top. The wire guide power mechanism 12 is installed on the frame 1, wire threading device 4 or lower head of the wire EDM machine. The material blocking power mechanism 8 can be installed on the wire guide power mechanism 12, so that the wire guide power mechanism 12 can simultaneously drive the material blocking component 9 and the movable wire guide component 11 to rise and fall. The rising and falling of the movable wire guide component 11 is coordinated with the movement of the material blocking component 9. This can reduce the distance between the electrode wire channel and the workpiece during wire threading to ensure wire threading stability, while also preventing waste from falling into the electrode wire channel during wire EDM.

[0066] like Figure 6-8 The wire guide power mechanism 12 shown includes: a lifting power source 121, a mounting base 122, a wire guide spring 124, and an unlocking member 123. The mounting base 122 is mounted on the lifting power source 121. One end of the wire guide spring 124 is connected to the mounting base 122, and the other end is connected to the movable wire guide member 11. The wire guide spring 124 applies a force to the movable wire guide member 11 to move it closer to the electrode wire. The unlocking member 123 is located below the movable wire guide member 11 and applies a force to the movable wire guide member 11 to move it away from the electrode wire. The unlocking member 123 has... The device is equipped with a guide structure. When the wire guide power mechanism 12 drives multiple movable wire guides 11 to descend, the movable wire guides 11 connect with the guide structure of the unlocking member 123, causing the multiple movable wire guides 11 to move away from the electrode wire. Only one lifting power source 121 is needed to drive the multiple movable wire guides 11 to move in multiple directions. In other embodiments, a lateral power source connected to the lifting power source 121 can also be provided to connect the multiple movable wire guides 11 to the lateral power source, so that the lifting power source 121 and the lateral power source cooperate to drive the multiple movable wire guides 11 to move in multiple directions.

[0067] like Figure 9 The automatic wire cutting machine shown also includes: an upper cover 13, which is installed on the wire guiding power mechanism 12. The upper cover 13 is located above the movable wire guide 11, and the wire guiding power mechanism 12 is used to drive the upper cover 13 to descend or rise.

[0068] When the multiple movable wire guides 11 move away from the electrode wire, the sidewalls of the multiple movable wire guides 11 used to form the second electrode wire channel are located below the upper cover 13.

[0069] like Figure 9 The automatic wire cutting machine shown also includes a lifting wire guide 14, which has a third electrode wire channel through which the electrode wire can pass.

[0070] The lifting wire guide 14 is installed on the wire guide power mechanism 12. The lifting wire guide 14 is located above the movable wire guide 11. The outer diameter of the lifting wire guide 14 is smaller than the outer diameter when multiple movable wire guides 11 form the second electrode wire channel. The wire guide power mechanism 12 is used to drive the lifting wire guide 14 to descend or rise.

[0071] When multiple movable wire guides 11 form a second electrode wire channel, the electrode wires sequentially pass through the machining holes of the workpiece and then sequentially pass through the third electrode wire channel, the second wire-passing channel, and the first wire-passing channel.

[0072] like Figure 9 The lifting wire guide 14 shown is mounted on the wire guide power mechanism 12 via the upper cover 13, and serves both to cooperate with the workpiece and to protect the movable wire guide 11.

[0073] like Figure 10 and 11 The automatic wire cutting machine shown also includes a detection plate 15 and a detection power mechanism 16, both of which are installed on the wire threading device 4 of the wire cutting machine.

[0074] The wire threading device 4 is provided with a wire threading tube 41, and a guide channel for the electrode wire to pass through is provided inside the wire threading tube 41. The detection plate 15 is movably inserted into the guide channel, and the detection plate 15 is used to connect to the electrical control system of the wire cutting machine. The detection plate 15 can detect the position of the electrode wire end by cooperating with the electrical control system and the electrode wire to make the electrode wire energized.

[0075] The detection power mechanism 16 is connected to the detection plate 15 and is used to drive the detection plate 15 to reciprocate between a detection position that can detect the position of the electrode wire end in the guide channel and a yielding position that does not obstruct the passage of the electrode wire. Figure 11 The detection plate 15 shown has a clearance hole 151. When the detection plate 15 moves to the clearance position, the clearance hole 151 is aligned with the guide channel.

[0076] like Figure 10 The threading device 4 shown is a prior art device including a threading tube 41 and a threading power mechanism 42. The threading tube 41 is installed on the threading power mechanism 42, which is used to drive the threading tube 41 to reciprocate along its own length.

[0077] like Figure 11The detection power mechanism 16 shown includes: a detection guide 161, a detection moving part 162, a detection spring 163, and a detection push plate 164. The detection guide 161 is installed on the wire threading tube 41, the detection moving part 162 is installed on the detection guide 161, the detection plate 15 is installed on the detection moving part 162, and the detection push plate 164 is disposed in a position that can press against the detection moving part 162. When the detection moving part 162 moves towards the detection push plate 164, the detection moving part 162 presses against the detection push plate 164. When the detection plate 15 moves from the yielding position to the detection position, and the detection moving part 162 moves away from the detection push plate 164, the detection spring 163 drives the detection plate 15 to move from the detection position to the yielding position. In this embodiment, the detection push plate 164 can be installed on the fixed part of the wire threading device 42 or the frame of the wire cutting machine. The process of the wire threading power mechanism 42 driving the wire threading tube 41 to cooperate with the wire source device 2 can make the detection plate 15 reciprocate between the detection position and the yielding position without the need to add an additional power source.

[0078] In other embodiments, a detection power source may be configured to drive the detection plate 15 to move up and down, laterally, longitudinally, or rotate, so that the detection plate 15 reciprocates between a detection position that can detect the position of the electrode wire end in the guide channel and a yielding position that does not obstruct the passage of the electrode wire.

[0079] like Figure 12 The wire source device 2 shown includes: a wire winding spool 21, a clamping plate 22, a pressing mechanism 23, and a separating mechanism 24.

[0080] The clamp 22 is installed on the outer wall of the winding drum 21 and can reciprocate in the direction of approaching or moving away from the outer wall of the winding drum 21, so that the clamp 22 has a pressed state that is tightly pressed against the outer wall of the winding drum 21 and a separated state that is separated from the outer wall of the winding drum 21 by a certain distance.

[0081] The pressing mechanism 23 is used to apply a force to the clamping piece 22 to bring it closer to the outer wall of the winding spool 21, such as... Figure 12 The pressing mechanism 23 shown is a prior art technique that applies a force to the clamp 22 by means of a spring and a guide mechanism to bring it close to the outer wall of the winding drum 21.

[0082] Separation mechanism 24 is used to apply a force to clamp 22 to move it away from the outer wall of winding spool 21, such as Figure 12 The separation mechanism 24 shown may include a pusher and a drive assembly. The drive assembly is connected to the pusher for driving the pusher to reciprocate in a direction toward or away from the inner wall of the winding drum 21. The pusher can at least move to abut against the force-bearing member and push the force-bearing member to move toward the inner wall of the winding drum 21. The drive assembly may be an electric cylinder, a lead screw mechanism, or a linear motor.

[0083] The clamp 22 can switch between a pressing state and a separating state under the action of the pressing mechanism 23 and the separating mechanism 24.

[0084] Usage: Before threading the wire, the electrode wire carried by the wire source device 2 extends into the upper wire guide 7 on the lifting device 3. The lifting device 3 drives the upper wire guide 7 and the sleeve 5 to move closer to the workpiece. When the lifting device 3 drives the sleeve 5 to the position where it contacts the workpiece, the lifting device 3 continues to drive the upper wire guide 7 to move, so that the distance between the end of the upper wire guide 7 and the workpiece reaches the preset distance. During this process, the sleeve 5 contacts the workpiece, and the sleeve 5 compresses the spring, causing the sensing part 51 to move to the position where the sensor 6 is triggered. At this time, the lifting device 3 stops moving.

[0085] Before threading the wire, the material blocking power mechanism 8 causes the material blocking component 9 to move away from the third electrode wire channel above the lifting wire guide component 14. The wire guiding power mechanism 12 drives the upper cover 13, the lifting wire guide component 14 and multiple movable wire guide components 11 to rise, causing the multiple movable wire guide components 11 to move towards the direction of the electrode wire to form a second electrode wire channel through which the electrode wire can pass.

[0086] During the wire threading process, the electrode wire in the upper wire guide 7 passes through the wire blocking channel 53, the machining hole of the workpiece, the third electrode wire channel, the second wire threading channel and the first wire threading channel before entering the wire threading device 4. During this process, the detection power mechanism 16 drives the detection plate 15 to move to a detection position that can detect the position of the end of the electrode wire in the guide channel. After the detection plate 15 on the wire threading device 4 detects the position of the wire end, the detection power mechanism 16 drives the detection plate 15 to move to a yielding position that does not obstruct the passage of the electrode wire.

[0087] During the threading process, the separating mechanism 24 applies a force to the clamping piece 22, moving it away from the outer wall of the winding bobbin 21, causing the clamping piece 22 to move to a position similar to... Figure 12 At the position shown, the threading power mechanism 42 of the threading device 4 moves the threading tube 41 to a position where it engages with the clamping plate 22 and the winding drum 21, and then moves the electrode wire between the clamping plate 22 and the winding drum 21. Then, the pressing mechanism 23 applies a force to the clamping plate 22 to bring it close to the outer wall of the winding drum 21, clamping the electrode wire between the clamping plate 22 and the winding drum 21.

[0088] After the wire threading is completed, the wire guiding power mechanism 12 drives the upper cover 13, the lifting wire guide 14 and multiple movable wire guides 11 to descend, causing the multiple movable wire guides 11 to move away from the electrode wire, and the material stop 9 moves to the position above the third electrode wire channel of the lifting wire guide 14.

[0089] During the wire EDM process, the wire source device 2 drives the electrode wire to move and perform downward cutting on the workpiece. During this process, the material stop 9 is used to block the falling of waste material and cutting parts above the third electrode wire channel of the lifting wire guide 14.

[0090] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An automatic wire cutting machine, characterized in that, include: The machine frame, wire source device, lifting device, wire threading device, upper wire guide, sleeve, sensor, fixed wire guide, multiple movable wire guides and wire guide power mechanism; The yarn source device, lifting device, and yarn threading device are installed on the frame. The upper yarn guide is installed on the lifting device. The sleeve is jackingly fitted onto the upper yarn guide. The sensor is located at a position that mates with the sleeve. The lifting device is used to drive the upper yarn guide and the sleeve to rise and fall. When the lifting device brings the distance between the end of the upper guide wire and the workpiece to a preset distance, the sleeve connects with the workpiece, triggering the sensor. The fixed guide wire component is provided with a first electrode wire channel through which the electrode wire can pass. The movable guide wire component is installed on the guide wire power mechanism, which is used to drive multiple movable guide wire components to descend or rise. The guide wire power mechanism includes: a lifting power source, a mounting base, a guide wire spring, and an unlocking component; The mounting base is installed on the lifting power source. One end of the guide wire spring is connected to the mounting base, and the other end is connected to the movable guide wire component. The guide wire spring is used to apply a force to the movable guide wire component to move closer to the electrode wire. The unlocking component is located below the movable guide wire component. The unlocking component is used to apply a force to the movable guide wire component to move away from the electrode wire. A guide structure is provided above the unlocking component. When the guide wire power mechanism drives multiple movable guide wire components to descend, the movable guide wire components are connected to the guide structure of the unlocking component, causing the multiple movable guide wire components to move away from the electrode wire. When the guide wire power mechanism drives multiple movable guide wire components to rise, the multiple movable guide wire components move towards the direction of the electrode wire to form a second electrode wire channel through which the electrode wire can pass.

2. The automatic wire cutting machine according to claim 1, characterized in that, Also includes: A positioning spring is disposed above the sleeve, and the positioning spring is used to apply a downward force to the sleeve.

3. The automatic wire cutting machine according to claim 1, characterized in that, The sleeve has a wire-blocking channel below the upper wire guide.

4. The automatic wire cutting machine according to claim 1, characterized in that, Also includes: A material-stopping power mechanism and a material-stopping component, wherein the material-stopping component is installed on the material-stopping power mechanism; The wire threading device is provided with an electrode wire channel through which the electrode wire can pass, and the material blocking power mechanism is used to make the material blocking component block above or away from the electrode wire channel. When the baffle moves to a position above the electrode wire channel, the baffle is used to prevent waste and cut parts from falling from above the electrode wire channel.

5. The automatic wire cutting machine according to claim 4, characterized in that, The material blocking power mechanism includes a rotary power source, the material blocking component is mounted on the rotary power source, and the rotary power source is used to drive the material blocking component to rotate, so that the material blocking component moves between a side position and an upper position in the electrode wire channel.

6. The automatic wire cutting machine according to claim 1, characterized in that, Also includes: Top cover; The upper cover is installed on the wire guide power mechanism and is located above the movable wire guide. The wire guide power mechanism is used to drive the upper cover to descend or rise. When the plurality of movable wire guides move away from the electrode wire, the sidewalls of the plurality of movable wire guides used to form the second electrode wire channel are located below the upper cover.

7. The automatic wire cutting machine according to claim 1, characterized in that, Also includes: A lifting wire guide, wherein the lifting wire guide is provided with a third electrode wire channel through which the electrode wire can pass; The lifting wire guide is installed on the wire guide power mechanism. The lifting wire guide is positioned above the movable wire guide. The outer diameter of the lifting wire guide is smaller than the outer diameter when multiple movable wire guides form the second electrode wire channel. The wire guide power mechanism is used to drive the lifting wire guide to descend or rise. When multiple movable wire guides form a second electrode wire channel, the electrode wires sequentially pass through the machining holes of the workpiece and then sequentially pass through the third electrode wire channel, the second wire-passing channel, and the first wire-passing channel.

8. The automatic wire cutting machine according to claim 1, characterized in that, Also includes: The detection plate and the detection power mechanism are both installed on the wire threading device of the wire cutting machine; The wire threading device is provided with a wire threading tube, and the wire threading tube is provided with a guide channel for the electrode wire to pass through. The detection plate is movably inserted into the guide channel, and the detection plate is used to connect to the electrical control system of the wire cutting machine. The detection power mechanism is connected to the detection plate and is used to drive the detection plate to reciprocate between a detection position that can detect the position of the electrode wire end in the guide channel and a yielding position that does not obstruct the passage of the electrode wire.

9. An automatic wire cutting machine according to claim 1, characterized in that, The wire source device includes: a wire winding spool, clamping plates, a pressing mechanism, and a separating mechanism; The clamp is installed on the outer wall of the winding cylinder and can reciprocate in the direction of approaching or moving away from the outer wall of the winding cylinder, so that the clamp has a pressed state that is tightly pressed against the outer wall of the winding cylinder and a separated state that is separated from the outer wall of the winding cylinder by a certain distance. The pressing mechanism is used to apply a force to the clamping piece to bring it closer to the outer wall of the winding cylinder; The separation mechanism is used to apply a force to the clamp to move it away from the outer wall of the winding drum; The clamping plate can automatically switch between a pressing state and a separating state under the action of the pressing mechanism and the separating mechanism.

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