Guiding device and control method for an electrical discharge drilling machine

Abstract

The application provides a guiding device and control method of an electric spark small hole machine, the device comprises a wire supporting assembly and a guiding assembly; the wire supporting assembly and the guiding assembly are arranged at intervals along the conveying direction of an electrode wire; the electrode wire passes through the wire supporting assembly and the guiding assembly in sequence; wherein the wire supporting assembly is used for restricting the swing of the electrode wire when the electrode wire rotates; and the guiding assembly is used for guiding the electrode wire to a target machining position. The guiding device and control method of the electric spark small hole machine provided by the application can ensure that the electrode wire passes through the guiding assembly smoothly when the electrode wire threading operation is performed, and can limit the swing of the electrode wire when the electrode wire rotates during machining, thereby improving the machining precision of small holes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of processing equipment, in particular to a guiding device of an electric spark small hole machine and a control method thereof. BACKGROUND

[0002] With the increasing demand for small hole processing in the aerospace industry and the mold industry, not only is high precision required for processing small holes, but also the small hole machine needs to be integrated into the automatic production line of the factory to realize unmanned processing. Most of the electric spark small hole machines on the market do not have the condition to be integrated into the automatic production line. The replacement and threading of the guide of the existing small hole machine are mostly manually operated. At the same time, because the electrode wire is not rigid, the electrode wire at the lower end of the swing guide swings greatly when the small hole machine is processing due to the rotation of the electrode wire, and the precision of the processed small hole is poor. SUMMARY

[0003] The present application provides a guiding device of an electric spark small hole machine to solve the defects that the electrode wire at the lower end of the swing guide swings greatly and the precision of the processed small hole is poor due to the rotation of the electrode wire in the prior art. By arranging a wire supporting assembly in the conveying direction of the electrode wire, the electrode wire can be smoothly threaded through the guide assembly during the electrode wire threading operation, and the swing of the electrode wire during processing can be limited when the electrode wire rotates, thereby improving the precision of the processed small hole.

[0004] The present application also provides a control method of the guiding device of the electric spark small hole machine.

[0005] According to the first aspect of the present application, a guiding device of an electric spark small hole machine is provided, comprising: a wire supporting assembly and a guide assembly;

[0006] The wire supporting assembly and the guide assembly are arranged in the conveying direction of the electrode wire.

[0007] The electrode wire sequentially passes through the wire supporting assembly and the guide assembly.

[0008] The wire supporting assembly is used to constrain the swing of the electrode wire when the electrode wire rotates.

[0009] The guide assembly is used to guide the electrode wire to the target processing position.

[0010] According to an embodiment of the present application, the wire supporting assembly comprises: a wire supporting cylinder and a wire supporting device.

[0011] The wire supporting cylinder is connected with the wire supporting device to drive the rotation of the wire supporting device.

[0012] Two wire supporting devices are arranged in the conveying direction of the electrode wire and are buckled to form a through hole for the electrode wire to pass through in the closed state.

[0013] The through hole is used for restricting swing of the electrode wire when rotating.

[0014] Specifically, the embodiment provides an implementation of a wire supporting cylinder and a wire supporting device. The wire supporting cylinder is arranged to drive the wire supporting device to open and close. After the two wire supporting devices are buckled, a through hole for the electrode wire is formed. The through hole can also restrict swing of the electrode wire during rotation of the electrode wire, thereby improving precision of machining of a small hole.

[0015] It should be noted that the wire supporting cylinder can be arranged in one-to-one correspondence with the wire supporting device, or one wire supporting cylinder can drive two wire supporting devices to move. In order to save space, the present application does not make too many descriptions. In actual application, a pump source and a pipeline connected with the wire supporting cylinder are arranged to provide medium for the wire supporting cylinder and ensure movement of the wire supporting cylinder.

[0016] According to an implementation of the present application, opposite inner walls of the two wire supporting devices are provided with injection ports.

[0017] The injection ports are arranged in a circumferential direction of the through hole.

[0018] The injection ports are arranged in a circumferential direction of the through hole.

[0019] The injection ports are arranged in a circumferential direction of the through hole.

[0020] According to an implementation of the present application, the injection ports are arranged in a circumferential direction of the through hole.

[0021] The injection ports are arranged in a circumferential direction of the through hole.

[0022] According to an implementation of the present application, the wire supporting assembly further comprises a first support base, a second support base and an insulating base.

[0023] The first support base is connected with the second support base.

[0024] The insulating base is connected with a side of the first support base away from the second support base.

[0025] The wire supporting assembly is arranged on the insulating base.

[0026] The guiding assembly is arranged on the second support base.

[0027] Specifically, the embodiment provides an implementation of a first support seat, a second support seat and an insulating seat, which form a support structure of a wire-straightening cylinder and a guide assembly.

[0028] According to an implementation of the present application, the wire-straightening assembly further comprises a first connecting piece and a first steel ball.

[0029] The first connecting piece is connected to the first support seat and the second support seat.

[0030] The first steel ball is arranged between the first support seat and the second support seat to adjust the parallelism between the axial direction of the through hole and the guide direction of the guide assembly.

[0031] Specifically, the embodiment provides an implementation of a first connecting piece and a first steel ball, which realizes the connection between the first support seat and the second support seat and the fine adjustment of the angle.

[0032] According to an implementation of the present application, the guide assembly comprises a mandrel, a connecting seat and a guide.

[0033] The mandrel is connected to the second support seat.

[0034] The connecting seat is inserted into the mandrel away from the wire-straightening assembly.

[0035] The guide is inserted into the connecting seat away from the mandrel and extends towards the target machining position.

[0036] The electrode wire passes through the mandrel, the connecting seat and the guide in sequence.

[0037] Specifically, the embodiment provides an implementation of a mandrel, a connecting seat and a guide, the mandrel is connected to the second support seat, the connecting seat is inserted into the mandrel to provide a mounting position for the guide, and the guide is inserted into the connecting seat to guide the electrode wire to the target machining position.

[0038] According to an implementation of the present application, the guide assembly further comprises a chuck sleeve, a second steel ball, an elastic part and a piston.

[0039] The chuck sleeve is inserted between the mandrel and the connecting seat.

[0040] The second steel ball is arranged along the circumference of the mandrel and abuts against the chuck sleeve.

[0041] The elastic part is arranged between the chuck sleeve and the mandrel.

[0042] The piston is connected to the mandrel to deliver gas between the mandrel and the chuck sleeve;

[0043] Under the action of the elastic part, the chuck sleeve moves along the extension direction of the electrode wire toward the side closer to the spindle, so as to push the second steel ball to abut against the connecting seat, thereby locking the connecting seat and the spindle.

[0044] The piston delivers gas between the mandrel and the chuck sleeve. The chuck sleeve moves away from the mandrel along the extension direction of the electrode wire. The second steel ball separates from the connector to unlock the connector from the mandrel.

[0045] Specifically, this embodiment provides an implementation of a chuck sleeve, a second steel ball, an elastic part, and a piston. By providing the chuck sleeve, the second steel ball, the elastic part, and the piston, a stable connection between the guide and the connecting seat inside the spindle is achieved.

[0046] A control method for the guiding device of the above-mentioned EDM small hole machine, provided by a second aspect of the present invention, includes:

[0047] In response to the wire change signal, the wire guide cylinder drives the wire guide to switch to the open state;

[0048] When the electrode wire moves to a preset position, the wire guide switches from an open state to a closed state, wherein the through hole formed by the two wire guides surrounds the electrode wire;

[0049] The electrode wire moves until it passes through the guide and extends to the target processing position in the direction guided by the guide;

[0050] The electrode wire is driven to rotate to perform small hole machining at the target machining position.

[0051] According to one embodiment of the present invention, after the step of rotating the electrode wire and machining a small hole at the target machining position, the method further includes:

[0052] Obtain the rotation parameters of the electrode wire, and generate an adjustment decision based on the rotation parameters;

[0053] The adjustment decision is executed to adjust the intensity and / or direction of the airflow ejected from the injection port to constrain the oscillation of the electrode wire during rotation. The plurality of injection ports are disposed on the inner wall of the wire guide and are evenly distributed along the circumference of the through hole.

[0054] Specifically, this embodiment provides an implementation method for machining small holes at the target machining position. By obtaining the rotation parameters of the electrode wire, the intensity and / or direction of the jet airflow from the injection port are adjusted, thereby achieving the counteracting of the oscillation of the electrode wire during rotation by the airflow.

[0055] The above-mentioned one or more technical solutions of the present invention have at least one of the following technical effects: The present invention provides a guiding device and control method for an EDM small hole machine. By setting a wire-supporting component in the electrode wire conveying direction, it can ensure that the electrode wire passes smoothly through the guiding component during the electrode wire threading operation, and can also limit the swaying of the electrode wire during the rotation during processing, thereby improving the accuracy of the small hole.

[0056] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0058] Figure 1 This is one of the assembly relationship diagrams of the guide device for the EDM small hole machine provided by the present invention;

[0059] Figure 2 This is the second schematic diagram of the assembly system of the guide device for the EDM small hole machine provided by the present invention;

[0060] Figure 3 This is the third schematic diagram of the assembly relationship of the guide device for the EDM small hole machine provided by the present invention;

[0061] Figure 4 yes Figure 3 Sectional view along axis AA;

[0062] Figure 5 This is a schematic diagram showing the assembly relationship of the mandrel, chuck sleeve, second steel ball, elastic part and piston in the guide device of the EDM small hole machine provided by the present invention;

[0063] Figure 6 This is a schematic diagram of the structural relationship of the connecting seat in the guiding device of the EDM small hole machine provided by the present invention;

[0064] Figure 7 This is a schematic diagram of the structural relationship of the guide in the guiding device of the EDM small hole machine provided by the present invention;

[0065] Figure 8 This is a schematic diagram showing the arrangement of the two wire guides engaging in the guiding device of the EDM small hole machine provided by the present invention.

[0066] Figure 9 This is a schematic diagram of the structural relationship of the wire guide in the guiding device of the EDM small hole machine provided by the present invention;

[0067] Figure 10 This is a schematic diagram of the control method for the guiding device of the EDM small hole machine provided by the present invention.

[0068] Figure label:

[0069] 10. Electrode wire; 20. Wire guide cylinder; 30. Wire guide device; 31. Through hole; 32. Injection port; 40. First support seat; 41. Second support seat; 42. Insulating seat; 43. First connector; 44. First steel ball; 50. Mandrel; 60. Connecting seat; 70. Guide; 80. Collar sleeve; 90. Second steel ball; 100. Elastic part; 110. Piston. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0072] In some specific embodiments of the present invention, such as Figures 1 to 9As shown, this solution provides a guiding device for an EDM small hole machine, including: a wire support assembly and a guiding assembly; the wire support assembly and the guiding assembly are spaced apart along the conveying direction of the electrode wire 10; the electrode wire 10 passes through the wire support assembly and the guiding assembly in sequence; wherein, the wire support assembly is used to constrain the oscillation of the electrode wire 10 during rotation; the guiding assembly is used to guide the electrode wire 10 to the target processing position.

[0073] In detail, the present invention provides a guiding device for an EDM small hole machine to solve the defect in the prior art where the electrode wire 10 at the lower end of the swing guide 70 has large jump due to the rotation of the electrode wire 10, resulting in poor accuracy of the small hole. By setting a wire-supporting assembly in the electrode wire 10 conveying direction, the electrode wire 10 can be ensured to pass smoothly through the guiding assembly during the wire threading operation, and the swing of the electrode wire 10 during the rotation can be restricted, thereby improving the accuracy of the small hole.

[0074] In some possible embodiments of the present invention, the wire guide assembly includes: a wire guide cylinder 20 and a wire guide 30; the wire guide cylinder 20 is connected to the wire guide 30 to drive the rotation of the wire guide 30; two wire guides 30 are spaced apart along the direction perpendicular to the extension of the electrode wire 10, and are fastened together in the closed state to form a through hole 31 for the electrode wire 10 to pass through; wherein, the through hole 31 is used to constrain the oscillation of the electrode wire 10 when it rotates.

[0075] Specifically, this embodiment provides an implementation of a wire guide cylinder 20 and a wire guide device 30. By setting the wire guide cylinder 20, the opening and closing of the wire guide device 30 is realized. After the two wire guide devices 30 are engaged, a through hole 31 is formed for the electrode wire 10 to pass through. At the same time, the through hole 31 can also constrain the swing of the electrode wire 10 during rotation, thereby improving the accuracy of machining small holes.

[0076] It should be noted that the wire guide cylinder 20 can be set one-to-one with the wire guide 30, or one wire guide cylinder 20 can drive two wire guides 30 to operate. To save space, this invention has not described this in detail. In practical applications, a pump source and pipeline connected to the wire guide cylinder 20 are also provided to provide a medium for the wire guide cylinder 20 and ensure the operation of the wire guide cylinder 20.

[0077] In a possible implementation, the lead screw cylinder 20 is a pneumatic cylinder.

[0078] In a possible implementation, the lead screw cylinder 20 is an electric cylinder.

[0079] In a possible implementation, the lead screw cylinder 20 is a hydraulic cylinder.

[0080] In possible implementations, such as Figure 1The diagram shows a schematic of the structure in which the wire guide cylinder 20 drives the wire guide 30 in a closed state. After the two wire guides 30 are closed, a through hole 31 is formed for the electrode wire 10 to pass through. After the electrode wire 10 passes through the through hole 31, it enters the guide assembly and finally reaches the target processing position.

[0081] In possible implementations, such as Figure 2 The diagram shows a schematic of the structure in which the wire guide cylinder 20 drives the wire guide 30 in the open state. After the two wire guides 30 are opened, the replacement and installation of the electrode wire 10 can be realized.

[0082] In possible implementations, such as Figure 1 and Figure 2 As shown, it also includes structures such as a water flushing connector to achieve cooling and chip removal during the EDM small hole machining process. To save space, this invention has not been described in detail. In practical applications, the relevant design can be referred to.

[0083] In some possible embodiments of the present invention, the inner walls of the two wire guides 30 opposite each other are provided with injection ports 32; the injection ports 32 are evenly distributed along the circumference of the through holes 31; wherein, the airflow injected by the injection ports 32 is used to constrain the swaying of the electrode wire 10 during rotation.

[0084] Specifically, this embodiment provides an implementation of the injection port 32. By setting the injection port 32, airflow is injected onto the rotating electrode wire 10 to reduce the swaying of the electrode wire 10 during rotation and improve the accuracy of EDM small hole machining.

[0085] In possible implementations, such as Figure 8 and Figure 9 As shown, the injection ports 32 are evenly distributed in the opposite side walls of the wire guide 30, that is, the injection ports 32 are arranged in the circumferential direction of the through holes 31 on the inner wall of the wire guide 30.

[0086] In possible implementations, such as Figure 8 and Figure 9 As shown, the intensity of the airflow ejected from the nozzle 32 can be adjusted according to the rotation speed of the electrode wire 10 in order to counteract the swaying of the electrode wire 10 during rotation.

[0087] In possible implementations, such as Figure 8 and Figure 9 As shown, it also includes a pipeline and a pump source connected to the injection port 32 to provide airflow to the injection port 32. To save space, the present invention does not describe this in too much detail. In practical applications, the relevant settings can be referred to.

[0088] In some possible embodiments of the present invention, the orientation of the injection port 32 is opposite to the rotation direction of the electrode wire 10.

[0089] Specifically, this embodiment provides an implementation method for the orientation of the injection port 32. By setting the direction of the airflow ejected from the injection port 32 to be opposite to the rotation direction of the electrode wire 10, the oscillation of the electrode wire 10 is counteracted by the reverse airflow during the rotation of the electrode wire 10.

[0090] In a possible implementation, the nozzle 32 is oriented at an angle, specifically in the opposite direction to the rotation of the electrode wire 10, and at an angle of 30° to 60°.

[0091] In some possible embodiments of the present invention, the wire guide assembly further includes: a first support base 40, a second support base 41, and an insulating base 42; the first support base 40 is connected to the second support base 41; the insulating base 42 is connected to the side of the first support base 40 away from the second support base 41; wherein the wire guide assembly is disposed on the insulating base 42; and the guide assembly is disposed on the second support base 41.

[0092] Specifically, this embodiment provides an implementation of a first support base 40, a second support base 41, and an insulating base 42, which together form a support structure for the wire guide cylinder 20 and the guide assembly.

[0093] In possible implementations, such as Figures 1 to 4 As shown, the first support base 40 and the second support base 41 are support structures connected to each other to realize the spacing of the wire guide assembly and the guide assembly in the length direction of the electrode wire 10.

[0094] In a possible implementation, the insulating base 42 is made of insulating material.

[0095] In a possible implementation, the flushing connector is connected to the second support 41.

[0096] In some possible embodiments of the present invention, the guide wire assembly further includes: a first connector 43 and a first steel ball 44; at least two first connectors 43 are respectively connected to a first support 40 and a second support 41; the first steel ball 44 is disposed between the first support 40 and the second support 41 to adjust the parallelism between the axial direction of the through hole 31 and the guiding direction of the guide assembly.

[0097] Specifically, this embodiment provides an implementation of a first connector 43 and a first steel ball 44. Through the arrangement of the first connector 43 and the first steel ball 44, the connection between the first support base 40 and the second support base 41 is realized, as well as the fine adjustment of the angle.

[0098] In a possible implementation, a plurality of first connectors 43 are respectively connected to the first support 40 and the second support 41 to achieve a stable connection between the first support 40 and the second support 41.

[0099] In a possible implementation, the first connector 43 is a screw.

[0100] In a possible implementation, the first connector 43 is a pin.

[0101] In a possible implementation, the mating surfaces of the first support base 40 and the second support base 41 are provided with receiving grooves, and the receiving grooves are provided with first steel balls 44. The provision of the first steel balls 44 enables fine adjustment of the angle between the first support base 40 and the second support base 41, thereby achieving adjustment of the parallelism between the guide wire assembly and the guide assembly.

[0102] In a possible implementation, when fine-tuning the angle between the first support base 40 and the second support base 41 using the first steel ball 44, the first connecting member 43 is first completely or partially removed.

[0103] In some possible embodiments of the present invention, the guiding assembly includes: a mandrel 50, a connecting seat 60, and a guide 70; the mandrel 50 is connected to the second support seat 41; the connecting seat 60 is inserted into the side of the mandrel 50 away from the wire guide assembly; the guide 70 is inserted into the side of the connecting seat 60 away from the mandrel 50 and extends toward the target processing position; wherein, the electrode wire 10 passes through the mandrel 50, the connecting seat 60, and the guide 70 in sequence.

[0104] Specifically, this embodiment provides an implementation of a mandrel 50, a connecting seat 60, and a guide 70. The mandrel 50 is connected to a second support 41, and the connecting seat 60 is inserted into the mandrel 50 within the second support 41 to provide an installation position for the guide 70. The guide 70 guides the electrode wire 10 to the target processing position by inserting it into the connecting seat 60.

[0105] In possible implementations, such as Figures 1 to 4 As shown, a set screw is also provided between the guide 70 and the connecting seat 60 to achieve a stable connection between the guide 70 and the connecting seat 60.

[0106] In possible implementations, such as Figures 1 to 4 As shown, the spindle 50 and the second support base 41 are detachably connected.

[0107] In possible implementations, such as Figures 4 to 6 As shown, a conical hole is formed on the inner wall of the mandrel 50 along the extension direction of the electrode wire 10, and a conical hole is formed on the outer wall of the connecting seat 60 to mate with the inner wall of the mandrel 50.

[0108] In some possible embodiments of the present invention, the guide assembly further includes: a clamp sleeve 80, a second steel ball 90, an elastic part 100, and a piston 110; the clamp sleeve 80 is inserted between the mandrel 50 and the connecting seat 60; the second steel ball 90 is evenly distributed along the circumference of the mandrel 50 and abuts against the clamp sleeve 80; the elastic part 100 is disposed between the clamp sleeve 80 and the mandrel 50; the piston 110 is connected to the mandrel 50 to realize the delivery of gas between the mandrel 50 and the clamp sleeve 80; wherein, in the elastic part... Under the action of the sex part 100, the chuck sleeve 80 moves along the extension direction of the electrode wire 10 toward the side closer to the spindle 50, so as to push the second steel ball 90 to abut against the connecting seat 60, thereby locking the connecting seat 60 and the spindle 50; the piston 110 delivers gas between the spindle 50 and the chuck sleeve 80, and the chuck sleeve 80 moves along the extension direction of the electrode wire 10 toward the side away from the spindle 50, so that the second steel ball 90 separates from the connecting seat 60, thereby unlocking the connecting seat 60 and the spindle 50.

[0109] Specifically, this embodiment provides an implementation of a clamping head sleeve 80, a second steel ball 90, an elastic part 100, and a piston 110. By setting the clamping head sleeve 80, the second steel ball 90, the elastic part 100, and the piston 110, a stable connection between the guide 70 and the connecting seat 60 inside the spindle 50 is achieved.

[0110] In a possible implementation, a stepped hole is formed on the inner surface of the mandrel 50, and the second steel ball 90 is disposed in the stepped hole along the circumference of the mandrel 50. The stepped hole can ensure that the second steel ball 90 can move in the hole when tensioned and will not fall out of the mandrel 50.

[0111] In possible implementations, such as Figure 4 and Figure 5 As shown, the elastic part 100 provides the chuck cover 80 with an upward force in the vertical direction, so as to push the chuck cover 80 along... Figure 4 and Figure 5 The direction moves upward, and the end of the chuck sleeve 80 pushes the second steel ball 90 to move towards the axis. The second steel ball 90 contacts the conical surface on the conical groove of the connecting seat 60, causing the connecting seat 60 to move upward. The conical shaft of the connecting seat 60 and the conical hole of the spindle 50 are fully engaged.

[0112] In possible implementations, such as Figure 4 and Figure 5As shown, piston 110 is connected to corresponding pipelines and a pump source to provide airflow to piston 110. When air is supplied, compressed air enters the cavity between spindle 50 and piston 110 through the air hole on spindle 50, and overcomes the pressure of spring to drive piston 110 to move downward. Collar sleeve 80 also moves downward. At this time, second steel ball 90 is in a free state, and the upward tension force transmitted by second steel ball 90 to connecting seat 60 disappears. At the same time, the boss at the lower end of collar sleeve 80 abuts against connecting seat 60 and pushes it out.

[0113] In a possible implementation, the connection seat 60 and the spindle 50 are switched between locked and unlocked states through the cooperation between the spring and the piston 110. With the help of the guide 70 magazine, the connection seat 60 of the guide 70 can be automatically replaced.

[0114] In a possible implementation, during the removal of the connector 60, the device is moved to the guide 70 position by a machine tool, the air pipe connector is vented, the device is disengaged, at which point the connector 60 is detached from the device, and then the device is moved upwards and the connector 60 is removed.

[0115] In a possible implementation, during the installation of the connector 60, the connector 60 is placed in the guide 70 position, and the device is moved above the connector 60 and then released. The device is then moved down to the designated position and then the air is cut off and locked, thereby realizing the installation of the connector 60 and the replacement of the guide 70.

[0116] In some specific embodiments of the present invention, such as Figures 1 to 10 As shown, this solution provides a control method for the guiding device of the above-mentioned EDM small hole machine, including:

[0117] In response to the wire changing signal, the wire guide cylinder 20 drives the wire guide 30 to switch to the open state;

[0118] When the electrode wire 10 moves to the preset position, the wire guide 30 switches from the open state to the closed state, wherein the through hole 31 formed by the two wire guides 30 snapping together surrounds the electrode wire 10.

[0119] The electrode wire 10 moves until it passes through the guide 70 and extends to the target processing position in the direction guided by the guide 70;

[0120] The drive electrode wire 10 rotates to perform small hole machining at the target machining position.

[0121] In some possible embodiments of the present invention, after the step of rotating the electrode wire 10 to perform small hole machining at the target machining position, the method further includes:

[0122] Obtain the rotation parameters of electrode wire 10, and generate adjustment decisions based on the rotation parameters;

[0123] The adjustment decision is executed to adjust the intensity and / or direction of the jet airflow from the jet nozzle 32 to achieve the oscillation of the constrained electrode wire 10 during rotation. A plurality of jet nozzles 32 are provided on the inner wall of the wire guide 30 and are evenly distributed along the circumference of the through hole 31.

[0124] Specifically, this embodiment provides an implementation method for machining small holes at a target machining position. By obtaining the rotation parameters of the electrode wire 10, the intensity and / or direction of the jet airflow from the injection port 32 are adjusted, thereby achieving the offsetting of the oscillation of the electrode wire 10 during rotation by the airflow.

[0125] In a possible implementation, a steering mechanism is provided inside the injection port 32 to achieve fine adjustment of the injection direction of the injection port 32.

[0126] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0128] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A guiding device for an EDM (Electrical Discharge Machining) small hole machine, characterized in that, include: Support wire assembly and guide assembly; The wire support assembly and the guide assembly are spaced apart along the conveying direction of the electrode wire (10); The electrode wire (10) passes sequentially through the wire support assembly and the guide assembly; The wire-supporting assembly is used to constrain the oscillation of the electrode wire (10) during rotation; The guiding component is used to guide the electrode wire (10) to the target processing position; The wire guide assembly includes: a wire guide cylinder (20) and a wire guide (30); The wire guide cylinder (20) is connected to the wire guide (30) to drive the rotation of the wire guide (30); Two wire guides (30) are spaced apart along the extension direction perpendicular to the electrode wire (10) and are fastened together in the closed state to form a through hole (31) for the electrode wire (10) to pass through. The through hole (31) is used to constrain the oscillation of the electrode wire (10) during rotation; The inner walls of the two wire guides (30) opposite each other are provided with injection ports (32); The injection ports (32) are evenly distributed along the circumference of the through holes (31); The airflow ejected from the nozzle (32) is used to constrain the oscillation of the electrode wire (10) during rotation; the intensity of the airflow ejected from the nozzle (32) is related to the rotation speed of the electrode wire (10).

2. The guiding device for an EDM small hole machine according to claim 1, characterized in that, The orientation of the injection port (32) is opposite to the rotation direction of the electrode wire (10).

3. The guiding device for an EDM small hole machine according to claim 1 or 2, characterized in that, The wire guide assembly further includes: a first support base (40), a second support base (41), and an insulating base (42). The first support base (40) is connected to the second support base (41); The insulating base (42) is connected to the side of the first support base (40) away from the second support base (41); The wire support assembly is disposed on the insulating base (42). The guide component is disposed on the second support (41).

4. The guiding device for an EDM small hole machine according to claim 3, characterized in that, The wire guide assembly further includes: a first connector (43) and a first steel ball (44). At least two of the first connectors (43) are respectively connected to the first support (40) and the second support (41); The first steel ball (44) is disposed between the first support (40) and the second support (41) to adjust the parallelism between the axial direction of the through hole (31) and the guiding direction of the guide assembly.

5. The guiding device for an EDM small hole machine according to claim 3, characterized in that, The guide assembly includes: a spindle (50), a connecting seat (60), and a guide (70); The spindle (50) is connected to the second support base (41); The connecting seat (60) is inserted into the side of the mandrel (50) away from the wire support assembly; The guide (70) is inserted into the side of the connecting seat (60) away from the spindle (50) and extends toward the target machining position. The electrode wire (10) passes through the mandrel (50), the connecting seat (60), and the guide (70) in sequence.

6. The guiding device for an EDM small hole machine according to claim 5, characterized in that, The guide assembly further includes: a clip sleeve (80), a second steel ball (90), an elastic part (100), and a piston (110). The chuck sleeve (80) is inserted between the spindle (50) and the connecting seat (60); The second steel ball (90) is evenly distributed along the circumference of the mandrel (50) and abuts against the outer sleeve (80) of the chuck; The elastic part (100) is disposed between the clip sleeve (80) and the spindle (50); The piston (110) is connected to the spindle (50) to deliver gas between the spindle (50) and the chuck sleeve (80); Under the action of the elastic part (100), the clip sleeve (80) moves toward the side closer to the spindle (50) along the extension direction of the electrode wire (10) to push the second steel ball (90) to abut against the connecting seat (60) and realize the locking of the connecting seat (60) and the spindle (50); The piston (110) supplies gas between the spindle (50) and the chuck sleeve (80), and the chuck sleeve (80) moves away from the spindle (50) along the extension direction of the electrode wire (10). The second steel ball (90) separates from the connecting seat (60) to unlock the connecting seat (60) from the spindle (50).

7. A control method for the guiding device of an EDM small hole machine according to any one of claims 1 to 6, characterized in that, include: In response to the wire changing signal, the wire support cylinder (20) drives the wire support device (30) to switch to the open state; When the electrode wire (10) moves to the preset position, the wire guide (30) switches from the open state to the closed state, wherein the through hole (31) formed by the two wire guides (30) surrounds the electrode wire (10); The electrode wire (10) moves until it passes through the guide (70) and extends to the target processing position under the guidance of the guide (70); The electrode wire (10) is driven to rotate to perform small hole machining at the target machining position.

8. The control method for the guiding device of the EDM small hole machine according to claim 7, characterized in that, After the step of rotating the electrode wire (10) and machining a small hole at the target machining position, the process further includes: Obtain the rotation parameters of the electrode wire (10), and generate an adjustment decision based on the rotation parameters; The adjustment decision is executed to adjust the intensity and / or direction of the jet airflow from the jet nozzle (32) to constrain the oscillation of the electrode wire (10) during rotation. A plurality of the jet nozzles (32) are disposed on the inner wall of the wire guide (30) and are evenly distributed along the circumference of the through hole (31).

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