Automatic threading wire cutting machine

Abstract

The invention discloses an automatic threading wire cutting machine, and belongs to the field of wire cutting equipment. The automatic threading wire cutting machine comprises a rack, a wire source device, a lifting device, a threading device, an upper wire guide piece, a sleeve and a sensor, the wire source device, the lifting device and the threading device are installed on the rack, the upper wire guide piece is installed on the lifting device, the sleeve is arranged on an upper wire guide rod in a lifting and sleeving mode, and the sensor is arranged at the position matched with the sleeve. The lifting device is used for driving the upper wire guide piece and the sleeve to ascend and descend, and when the lifting device enables the distance between the end of the upper wire guide piece and the workpiece to reach the preset distance, the sleeve is connected with the workpiece to trigger the sensor. According to the invention, the sensor is matched with the sleeve to detect the positions of the upper wire guide piece and the workpiece under the condition that the upper wire guide piece is not connected with the workpiece, so that the probability of deviation of the bottom of the upper wire guide piece, which is provided with the eye mold, is reduced; the problem that in the prior art, due to the fact that an eye die deviates easily, the linear cutting machining precision of automatic wire penetrating is reduced is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of wire cutting equipment, in particular to an automatic wire-threading wire cutting machine. Background Art

[0002] In the prior art, during the operation of an automatic wire-threading wire cutting machine, the positioning accuracy of the electrode wire needs to be ensured by an eye mold of the wire guide close to the workpiece, thereby ensuring the accuracy of the wire cutting processing. However, during the automatic wire-threading wire cutting processing, there are multiple rigid contacts between the wire guide and the workpiece, which easily causes the eye mold to deviate, resulting in a reduction in the accuracy of the automatic wire-threading wire cutting processing. Summary of the Invention

[0003] Purpose of the invention: To provide an automatic wire-cutting and wire-cutting machine, which provides a liftable sleeve outside the upper wire guide so that the liftable sleeve contacts the workpiece during the automatic wire-cutting process. The upper wire guide does not need to contact the workpiece, thereby reducing the probability of deviation of the portion of the upper wire guide where the eye mold is installed, and solving the problem in the prior art that the eye mold is easily deviated, resulting in reduced precision of the wire-cutting process during automatic wire-threading.

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

[0005] The wire source device, lifting device and wire threading device are installed on the frame, the upper wire guide is installed on the lifting device, the sleeve is liftable and sleeved on the upper wire guide rod, the sensor is set in a position cooperating with the sleeve, and the lifting device is used to drive the upper wire guide and sleeve to rise and fall.

[0006] When the lifting device causes the distance between the end of the upper wire guide and the workpiece to reach a preset distance, the sleeve is connected to the workpiece so that the sensor is triggered.

[0007] In a further embodiment, the automatic wire cutting machine also includes: a positioning spring, which is arranged above the sleeve, and 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, thereby 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 slope structure, thereby restricting the electrode wire within the wire blocking channel and improving the success rate of wire threading.

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

[0010] The wire threading device is provided with an electrode wire passage for the electrode wire to pass through, and the material blocking power mechanism is used to make the material blocking member block above the electrode wire passage or leave above the electrode wire passage.

[0011] When the material blocking member moves to a position above the electrode wire channel, the material blocking member is used to block the falling of waste and cutting pieces above the electrode wire channel. The material blocking member is moved to above the electrode wire channel of the lower head by the material blocking power mechanism. When waste and cutting pieces are generated during online cutting processing, the waste and cutting pieces falling from above the electrode wire channel can fall on the material blocking member, preventing the waste and cutting pieces from contacting the electrode wire channel. This solves the problem in the prior art that waste and cutting pieces are easily hit at the part of the lower head where the electrode wire channel is provided 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 rotating power source, the material blocking member is installed on the rotating power source, and the rotating power source is used to drive the material blocking member to rotate so that the material blocking member moves between the lateral position and the upper position of the electrode wire channel. The rotation of the material blocking member can be used to tilt the waste material above the material blocking member to the lateral position of the electrode wire channel, and the rotation of the material blocking member after wire cutting processing can be used to push the waste material accumulated in the part of the lower head not covered by the material blocking member away from the electrode wire channel, thereby further reducing the impact of the accumulation of waste material on the lower head.

[0013] In a further embodiment, the automatic wire threading and cutting machine further comprises: a fixed wire guide member, a plurality of movable wire guide members and a wire guide power mechanism.

[0014] The fixed wire guide member is provided with a first electrode wire channel for the electrode wire to pass through, and the movable wire guide member is installed on a wire guide power mechanism, and the wire guide power mechanism is used to drive multiple movable wire guide members to descend or ascend.

[0015] When the wire guide power mechanism drives the multiple movable wire guide members to descend, the multiple movable wire guide members are moved in a direction away from the electrode wire.

[0016] When the wire guide power mechanism drives multiple movable wire guides to rise, the multiple movable wire guides are moved in the direction close to the electrode wire to a position where a second electrode wire channel is formed for the electrode wire to pass through. The movable wire guide can be moved in the direction away from or close to the electrode wire. Only when wire threading is required, the wire guide power mechanism drives multiple movable wire guides to rise and forms multiple movable wire guides in the direction close to the electrode wire to form the second electrode wire channel. When wire threading is not required, the multiple movable wire guides are opened to an open structure without forming the second electrode wire channel, so that the movable wire guide can avoid the fixed wire guide during the descent process. The movable wire guide can be lifted and lowered between the fixed wire guide and the workpiece without the fixed wire guide accommodating the movable wire, so that both the movable wire guide and the fixed wire guide can use the electrode wire channel with a smaller inner diameter. This solves the problem that the existing technology requires the fixed wire guide tube to accommodate the movable wire guide tube so that the movable wire guide tube can be lifted and lowered 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 further includes: an upper cover.

[0018] The upper cover is installed on the wire guide power mechanism, and the upper cover is arranged above the movable wire guide member. The wire guide power mechanism is used to drive the upper cover to descend or ascend.

[0019] When the multiple movable wire guides move in the direction away from the electrode wire, the side walls 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 side walls of the movable wire guides used to form the second electrode wire channel, thereby avoiding the problem of cutting waste hindering the movable wire guides from forming the second electrode wire channel.

[0020] In a further embodiment, the automatic wire-threading cutting machine further includes: a lifting wire guide member, wherein the lifting wire guide member is provided with a third electrode wire channel for the electrode wire to pass through.

[0021] The lifting wire guide member is installed on the wire guide power mechanism, and the lifting wire guide member is arranged above the movable wire guide member. The outer diameter of the lifting wire guide member is smaller than the outer diameter when multiple movable wire guide members form the second electrode wire channel. The wire guide power mechanism is used to drive the lifting wire guide member to descend or ascend.

[0022] When the plurality of movable wire guides form the second electrode wire channel, the electrode wire is sequentially passed through the machining hole of the workpiece and then through the third electrode wire channel, the second wire threading channel and the first wire threading channel in sequence. The lifting wire guide rises or falls together with the movable wire guide, and the outer diameter of the lifting wire guide is smaller than the outer diameter when the plurality of movable wire guides form the second electrode wire channel. When there is a groove structure under the workpiece and the outer diameters of the plurality of movable wire guides are too large to be inserted into the groove structure, the lifting wire guide can be inserted into the groove structure to perform wire threading.

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

[0024] The wire threading device is provided with a wire threading tube, and a guide channel for the electrode wire to pass through is provided in the wire threading tube. The detection plate is movably inserted in the guide channel, and the detection plate is used to connect the electric 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 move back and forth between a detection position capable of detecting the end position of the electrode wire in the guide channel and a yield position that does not hinder the passage of the electrode wire. A detection plate is movably inserted in the guide channel of the wire threading tube, and the detection plate can move back and forth between the detection position and the yield position under the action of the detection power mechanism. When the detection plate moves to the detection position, the detection plate can detect and locate the end position of the electrode wire in the wire threading tube by cooperating with the wire cutting machine electronic control system. After the detection is completed, the detection plate can be moved to the yield position to allow the electrode wire to pass normally, so that the end of the electrode wire can be accurately transported to the predetermined clamping position, which solves the problem that the existing technology cannot accurately locate the wire head position in the wire threading tube, resulting in difficulty in ensuring that the end of the electrode wire is accurately transported to the predetermined clamping position.

[0026] In a further embodiment, the filament source device includes: a filament winding drum, a clamping piece, a pressing mechanism and a separating mechanism.

[0027] The clip is installed on the outer wall of the wire winding drum and can move back and forth in the direction close to or away from the outer wall of the wire winding drum, so that the clip has a pressed state tightly pressed against the outer wall of the wire winding drum and a separated state separated from the outer wall of the wire winding drum by a distance.

[0028] The pressing mechanism is used to apply a force to the clip to make it close to the outer side wall of the wire winding drum.

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

[0030] The clamp can automatically switch between the pressed state and the separated state under the action of the pressing mechanism and the separating mechanism. Compared with the prior art that uses the wire threading tube to hit the clamp to open the clamp, the clamp is automatically switched between the pressed state and the separated state by the pressing mechanism and the separating mechanism, which can avoid collision or extrusion between the wire threading device and the clamp, reduce the wear of the wire threading device and the clamp, ensure the wire feeding effect and the wire clamping effect, and the outer wall of the wire winding drum can be provided with only the clamp component, which effectively reduces the eccentricity of the automatic wire clamping device.

[0031] The beneficial effects of the present invention are as follows: the present application arranges the sleeve on the upper wire guide rod, and can connect the liftable sleeve with the workpiece before the electrode wire on the wire source device needs to move from the upper wire guide through the workpiece toward the wire threading device, and utilizes the cooperation of the sensor and the sleeve to detect the position of the upper wire guide and the workpiece when the upper wire guide is not connected to the workpiece, and can force the sleeve to rise during the detection process, reducing the probability of deviation of the bottom of the upper wire guide where the eye mold is installed, ensuring the positioning accuracy of the electrode wire, and further ensuring the accuracy of automatic wire threading and wire cutting processing, solving the problem in the prior art that the eye mold is easily offset, resulting in reduced accuracy of wire cutting processing for automatic wire threading. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] Figure 2 yes Figure 1 A local enlarged schematic diagram of point A.

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

[0035] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at point B.

[0036] Figure 5 It is an axonometric structural diagram of the material blocking power mechanism and the material blocking member in cooperation with the wire threading device of the present invention.

[0037] Figure 6 It is a schematic diagram of the axonometric structure of an embodiment of the present invention in which multiple movable wire guides form a second electrode wire channel.

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

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

[0040] Figure 9 It is a schematic diagram of the axonometric structure of an embodiment of the present invention having an upper cover and a lifting guide wire member.

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

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

[0043] Figure 12 It is a schematic diagram of the axonometric structure of an embodiment of the wire source device of the present invention, including a wire winding drum, a clamping piece, a pressing mechanism and a separating mechanism.

[0044] The reference numerals shown in the figure are: frame 1, wire source device 2, wire winding drum 21, clamping piece 22, pressing mechanism 23, separation mechanism 24, lifting device 3, wire threading device 4, wire threading tube 41, wire threading power mechanism 42, sleeve 5, sensing part 51, positioning spring 52, wire blocking channel 53, sensor 6, upper wire guide member 7, material blocking power mechanism 8, material blocking member 9, fixed wire guide member 10, movable wire guide member 11, wire guide power mechanism 12, lifting power source 121, mounting seat 122, unlocking member 123, wire guide spring 124, upper cover 13, lifting wire guide member 14, detection plate 15, clearance hole 151, detection power mechanism 16, detection guide member 161, detection movable member 162, detection spring 163, detection push plate 164. DETAILED DESCRIPTION

[0045] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0046] The present application discloses an automatic wire-threading and wire-cutting machine, which is provided with a control device such as a PLC, and the power sources such as the motors and sensors of each device are connected to the control device, and the control device controls the coordinated operation of each device. The automatic wire-threading and wire-cutting machine arranges a liftable sleeve outside the upper wire guide, so that the liftable sleeve contacts the workpiece during the automatic wire-threading process, and the upper wire guide does not need to contact the workpiece, thereby reducing the probability of deviation of the portion of the upper wire guide where the eye mold is installed, and solving the problem in the prior art that the eye mold is easily offset, resulting in reduced precision of the wire-cutting process for automatic wire-threading.

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

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

[0049] The wire source device 2, the lifting device 3 and the wire threading device 4 are installed on the frame 1. Figure 2 As shown, the upper wire guide 7 is installed on the lifting device 3, the sleeve 5 can be lifted and lowered on the upper wire guide rod, and the sensor 6 is set in a position cooperating with the sleeve 5. The lifting device 3 is used to drive the upper wire guide 7 and the sleeve 5 to rise and fall, wherein the bottom of the electrode wire channel of the upper wire guide rod is provided with a wire eye mold, and the sensor 6 is a position sensor 6. The sensor 6 can be installed 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 in FIG. Figure 2 As shown, the sensor 6 is installed on the sleeve 5 and the sensor 6 is triggered when the distance between the sensor 6 and the lifting device 3 or the upper wire guide 7 reaches a preset distance.

[0050] When the lifting device 3 makes the distance between the end of the upper wire guide 7 and the workpiece reach a preset distance, the sleeve 5 contacts the workpiece and the sensor 6 is triggered.

[0051] Among them, the lifting device 3 is the existing technology, and a wire feeding device is installed on it so that the electrode wire can pass through the upper wire guide 7, the wire blocking channel 53, the processing hole of the workpiece, 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 cooperating with the wire source device 2.

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

[0053] like Figure 3 The sleeve 5 shown is provided with a sensing part 51 and a limit seat, the limit seat is installed on the upper machine head or the upper wire guide rod, the positioning spring 52 and the end of the sleeve 5 are arranged in the limit seat, the limit seat is provided with a long hole, the sensing part 51 extends through the long hole to the position cooperating with the sensor 6, the long 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 is provided with a wire blocking channel 53 below the upper wire guide 7 .

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

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

[0057] When the material stopper 9 moves to a position above the electrode wire passage, the material stopper 9 is used to prevent the waste material and the cut pieces above the electrode wire passage from falling.

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

[0059] like Figure 5 The blocking power mechanism 8 shown includes: a rotary power source, and a blocking member 9 is installed on the rotary power source. The rotary power source is used to drive the blocking member 9 to rotate, so that the blocking member 9 moves between the side position and the upper position of the electrode wire channel.

[0060] like Figure 5 The wire threading device 4 is provided with a lower head at one end below the lifting device 3, and the lower head is provided with an electrode wire channel. The material blocking power mechanism 8 can be as shown in FIG. Figure 5 The material blocking power mechanism 8 shown as being installed on the lower head can also be installed on the wire threading device 4 or the frame 1. In the embodiment where the wire threading device 4 is not provided with a lower head, the material blocking power mechanism 8 can be installed on the wire threading device 4 or the frame 1.

[0061] like Figure 6-8 The automatic wire threading and cutting machine shown further comprises: a fixed wire guide 10 , a plurality of movable wire guides 11 and a wire guide power mechanism 12 .

[0062] The fixed wire guide member 10 is provided with a first electrode wire channel for the electrode wire to pass through. The movable wire guide member 11 is installed on a wire guide power mechanism 12. The wire guide power mechanism 12 is used to drive the multiple movable wire guide members 11 to descend or ascend.

[0063] When the wire guide power mechanism 12 drives the multiple movable wire guide members 11 to descend, the multiple movable wire guide members 11 are moved in a direction away from the electrode wire.

[0064] When the wire guide power mechanism 12 drives the multiple movable wire guide members 11 to rise, the multiple movable wire guide members 11 are moved toward the direction close to the electrode wire to form a second electrode wire channel for the electrode wire to pass through.

[0065] Among them, a wire eye mold is provided at the top of the first electrode wire channel, and the wire guide power mechanism 12 is installed on the frame 1, wire threading device 4 or lower head of the wire cutting machine, so that 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 part 9 and the movable wire guide part 11 to rise and fall, so that the rising and falling of the movable wire guide part 11 is coordinated with the movement of the material blocking part 9, which can reduce the distance between the electrode wire channel and the workpiece during the wire threading process to ensure the wire threading stability, and can also prevent waste from falling into the electrode wire channel during wire cutting processing.

[0066] like Figure 6-8 The guide wire power mechanism 12 shown includes: a lifting power source 121, a mounting seat 122, a guide wire spring 124 and an unlocking member 123. The mounting seat 122 is installed on the lifting power source 121. One end of the guide wire spring 124 is connected to the mounting seat 122, and the other end is connected to the movable guide wire member 11. The guide wire spring 124 is used to apply a force to the movable guide wire member 11 to move toward the electrode wire. The unlocking member 123 is arranged below the movable guide wire member 11. The unlocking member 123 is used to apply a force to the movable guide wire member 11 to move away from the electrode wire. A guide structure is provided. When the guide wire power mechanism 12 drives the multiple movable guide wire parts 11 to descend, the movable guide wire parts 11 are connected to the guide structure of the unlocking part 123, so that the multiple movable guide wire parts 11 move in the direction away from the electrode wire. Only one lifting power source 121 can be set to drive the multiple movable guide wire parts 11 to move in multiple directions. In other embodiments, a transverse power source connected to the lifting power source 121 can also be set to connect the multiple movable guide wire parts 11 to the transverse power source, so that the lifting power source 121 and the transverse power source cooperate to drive the multiple movable guide wire parts 11 to move in multiple directions.

[0067] like Figure 9 The automatic wire threading and cutting machine shown further includes an upper cover 13 , which is mounted on the wire guide power mechanism 12 . The upper cover 13 is disposed above the movable wire guide member 11 , and the wire guide power mechanism 12 is used to drive the upper cover 13 to descend or ascend.

[0068] When the multiple movable wire guide members 11 move in a direction away from the electrode wire, the side walls of the multiple movable wire guide members 11 used to form the second electrode wire channel are located below the upper cover 13 .

[0069] like Figure 9 The automatic wire-threading cutting machine shown further includes: a lifting wire guide member 14, and the lifting wire guide member 14 is provided with a third electrode wire channel for the electrode wire to pass through.

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

[0071] When the plurality of movable wire guides 11 form the second electrode wire channel, the electrode wire is sequentially passed through the machining hole of the workpiece and then sequentially passes 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 member 14 is installed on the wire guide power mechanism 12 by being installed on the upper cover 13 , and has the functions of cooperating with the workpiece and protecting the movable wire guide member 11 .

[0073] like Figure 10 and 11 The automatic wire-threading WEDM machine shown further comprises: a detection plate 15 and a detection power mechanism 16 , both of which are mounted on the wire-threading device 4 of the WEDM 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 in the wire threading tube 41. The detection plate 15 is movably inserted in the guide channel, and the detection plate 15 is used to connect the electric control system of the wire cutting machine, wherein the detection plate 15 can detect the position of the electrode wire head through the coordination of the electric control system and the power supply of the electrode wire.

[0075] The detection power mechanism 16 is connected to the detection plate 15 and is used to drive the detection plate 15 to move back and forth between a detection position where the end position of the electrode wire in the guide channel can be detected and a yield position where the electrode wire does not pass through. Figure 11 The detection plate 15 is provided with 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 wire threading device 4 shown is a prior art device comprising a wire threading tube 41 and a wire threading power mechanism 42 . The wire threading tube 41 is mounted on the wire threading power mechanism 42 , and the wire threading power mechanism 42 is used to drive the wire threading tube 41 to move back and forth along its own length direction.

[0077] like Figure 11The detection power mechanism 16 shown includes: a detection guide 161, a detection moving member 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 member 162 is installed on the detection guide 161, the detection plate 15 is installed on the detection moving member 162, and the detection push plate 164 is set at a position that can be pressed together with the detection moving member 162. When the detection moving member 162 moves toward the detection push plate 164, the detection moving member 162 is pressed together with the detection push plate 164. When the detection moving member 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 yield 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 wire threading power mechanism 42 can drive the wire threading tube 41 to cooperate with the wire source device 2 to make the detection plate 15 move back and forth between the detection position and the yield position without adding an additional power source.

[0078] In other embodiments, a detection power source may be provided to drive the detection plate 15 up and down, horizontally, vertically or rotate so that the detection plate 15 can move back and forth between a detection position capable of detecting the end position of the electrode wire in the guide channel and a yield position that does not hinder the passage of the electrode wire.

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

[0080] The clip 22 is installed on the outer wall of the wire winding drum 21 and can move back and forth in the direction close to or away from the outer wall of the wire winding drum 21, so that the clip 22 has a pressed state tightly pressed against the outer wall of the wire winding drum 21 and a separated state separated from the outer wall of the wire winding drum 21 by a distance.

[0081] The pressing mechanism 23 is used to apply a force to the clip 22 to make it close to the outer wall of the winding drum 21. Figure 12 The pressing mechanism 23 shown is a conventional mechanism that applies a force to the clip 22 by means of a spring and a guide mechanism to make it close to the outer wall of the winding drum 21 .

[0082] The separation mechanism 24 is used to apply a force to the clip 22 to keep it away from the outer wall of the winding drum 21. Figure 12 The separation mechanism 24 shown can include a push member and a drive assembly, which is transmission-connected to the push member for driving the push member to move back and forth toward or away from the inner wall of the winding drum 21. The push member can at least move to abut against the force-bearing member and push the force-bearing member toward the inner wall of the winding drum 21, wherein the drive assembly can be an electric cylinder, a screw mechanism, or a linear motor.

[0083] The clip 22 can be switched between a pressed state and a separated state under the action of the pressing mechanism 23 and the separating mechanism 24 .

[0084] Instructions for use: 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, and the lifting device 3 drives the upper wire guide 7 and the sleeve 5 to move toward the workpiece. When the lifting device 3 drives the sleeve 5 to move to the position connected with the workpiece, the lifting device 3 continues to drive the upper wire guide rod to move so that the distance between the end of the upper wire guide rod and the workpiece reaches a preset distance. In this process, the sleeve 5 is connected with the workpiece, and the sleeve 5 compresses the spring, so that the sensing part 51 moves to the position where the sensor 6 is triggered, and the lifting device 3 stops moving.

[0085] Before threading the wire, the material blocking power mechanism 8 causes the material blocking member 9 to leave the third electrode wire channel of the lifting wire guide member 14, and the wire guide power mechanism 12 drives the upper cover 13, the lifting wire guide member 14 and multiple movable wire guide members 11 to rise, so that the multiple movable wire guide members 11 move toward the direction close to the electrode wire to form a position for forming a second electrode wire channel for the electrode wire to pass through.

[0086] During the wire threading process, the electrode wire in the upper wire guide 7 passes through the wire blocking channel 53, the processing hole of the workpiece, the third electrode wire channel, the second wire threading channel and the first wire threading channel and then enters the wire threading device 4. During this process, the detection power mechanism 16 drives the detection plate 15 to move to a detection position capable of detecting the end position of the electrode wire in the guide channel. After the detection plate 15 on the wire threading device 4 detects the wire head position of the electrode wire, the detection power mechanism 16 drives the detection plate 15 to move to a yielding position that does not hinder the passage of the electrode wire.

[0087] During the threading process, the separation mechanism 24 applies a force to the clip 22 to keep it away from the outer wall of the winding drum 21, so that the clip 22 moves to the position as shown in FIG. Figure 12 In the position shown, the wire threading power mechanism 42 of the wire threading device 4 moves the wire threading tube 41 to a position that cooperates with the clamp 22 and the wire winding drum 21, and then moves the electrode wire between the clamp 22 and the wire winding drum 21. Then, the pressing mechanism 23 applies a force to the clamp 22 to make it close to the outer wall of the wire winding drum 21 to clamp the electrode wire between the clamp 22 and the wire winding drum 21.

[0088] After the wire threading is completed, the wire guide power mechanism 12 drives the upper cover 13, the lifting wire guide member 14 and the multiple movable wire guide members 11 to descend, so that the multiple movable wire guide members 11 move away from the electrode wire, and the material blocking member 9 moves to the upper position of the third electrode wire channel of the lifting wire guide member 14.

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

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

Claims

1. An automatic wire cutting machine, characterized in that: include: Frame, wire source device, lifting device, wire threading device, upper wire guide, sleeve and sensor; The wire source device, lifting device and wire threading device are installed on the frame, the upper wire guide is installed on the lifting device, the sleeve is liftably sleeved on the upper wire guide rod, the sensor is set in a position cooperating with the sleeve, and the lifting device is used to drive the upper wire guide and the sleeve to move up and down; When the lifting device causes the distance between the end of the upper wire guide and the workpiece to reach a preset distance, the sleeve is connected to the workpiece so that the sensor is triggered.

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

3. The automatic wire cutting machine according to claim 1, characterized in that: The sleeve is provided with a wire blocking channel below the upper wire guide piece.

4. The automatic wire cutting machine according to claim 1, characterized in that: Also includes: A material blocking power mechanism and a material blocking member, wherein the material blocking member is installed on the material blocking power mechanism; The wire threading device is provided with an electrode wire passage for the electrode wire to pass through, and the material blocking power mechanism is used to make the material blocking member block above the electrode wire passage or leave above the electrode wire passage; When the material blocking member moves to a position above the electrode wire channel, the material blocking member is used to block the waste material and the cutting piece above the electrode wire channel from falling.

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 member is installed on the rotary power source, and the rotary power source is used to drive the material blocking member to rotate, so that the material blocking member moves between a side position and an upper position of the electrode wire channel.

6. The automatic wire cutting machine according to claim 1, characterized in that: Also includes: A fixed guide wire member, a plurality of movable guide wire members and a guide wire power mechanism; The fixed wire guide member is provided with a first electrode wire channel for the electrode wire to pass through, and the movable wire guide member is installed on a wire guide power mechanism, and the wire guide power mechanism is used to drive the multiple movable wire guide members to descend or ascend; When the guide wire power mechanism drives the multiple movable guide wire members to descend, the multiple movable guide wire members are moved in a direction away from the electrode wire; When the wire guide power mechanism drives the multiple movable wire guide members to rise, the multiple movable wire guide members are moved toward the direction close to the electrode wire to form a position where a second electrode wire channel is formed for the electrode wire to pass through.

7. The automatic wire cutting machine according to claim 6, characterized in that: Also includes: Upper cover; The upper cover is mounted on the wire guide power mechanism, and the upper cover is arranged above the movable wire guide member, and the wire guide power mechanism is used to drive the upper cover to descend or ascend; When the plurality of movable wire guide members move in a direction away from the electrode wire, the side walls of the plurality of movable wire guide members used to form the second electrode wire channel are located below the upper cover.

8. The automatic wire cutting machine according to claim 6, characterized in that: Also includes: A lifting wire guide member, wherein the lifting wire guide member is provided with a third electrode wire channel for the electrode wire to pass through; The lifting wire guide member is installed on the wire guide power mechanism, the lifting wire guide member is arranged above the movable wire guide member, the outer diameter of the lifting wire guide member is smaller than the outer diameter of the second electrode wire channel formed by the plurality of movable wire guide members, and the wire guide power mechanism is used to drive the lifting wire guide member to descend or ascend; When the plurality of movable wire guides form the second electrode wire channel, the electrode wire is sequentially passed through the machining hole of the workpiece and then sequentially passed through the third electrode wire channel, the second wire passing channel and the first wire passing channel.

9. The automatic wire cutting machine according to claim 1, characterized in that: Also includes: A detection plate and a detection power mechanism, both of which are installed on the wire threading device of the wire cutting machine; The wire threading device is provided with a wire threading tube, wherein a guide channel for the electrode wire to pass through is provided in the wire threading tube, and the detection plate is movably inserted into the guide channel, and the detection plate is used to connect to the electric 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 move back and forth between a detection position capable of detecting the end position of the electrode wire in the guide channel and a yield position that does not hinder the passage of the electrode wire.

10. The automatic wire cutting machine according to claim 1, characterized in that: The wire source device comprises: a wire winding drum, a clamping piece, a pressing mechanism and a separating mechanism; The clip is mounted on the outer wall of the wire winding drum and can reciprocate toward or away from the outer wall of the wire winding drum, so that the clip has a pressed state in which it is tightly pressed against the outer wall of the wire winding drum and a separated state in which it is separated from the outer wall of the wire winding drum by a distance; The pressing mechanism is used to apply a force to the clip to make it close to the outer wall of the wire winding drum; The separation mechanism is used to apply a force to the clip to keep it away from the outer side wall of the wire winding drum; The clip can automatically switch between a pressed state and a separated state under the action of the pressed mechanism and the separated mechanism.

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