Bore machining apparatus and method

Abstract

A kind of hole processing device and method, hole processing device is used to process hole (HP) in workpiece (WP), comprising: processing head (10) is used to carry out material removal to workpiece (WP);At least two support mechanisms (20), each support mechanism (20) is used to support the inner wall of hole (HP) of workpiece (WP) or release the support of the inner wall of hole (HP) of workpiece (WP), wherein the support mechanism (20) of at least two support mechanisms (20) most adjacent processing head (10) is defined as first support mechanism (21);First drive mechanism (30) is connected between processing head (10) and first support mechanism (21), for driving processing head (10) adjustment steering angle relative to first support mechanism (21);And at least one second drive mechanism (40) is connected between at least one set of adjacent two support mechanisms (20), for driving adjacent two support mechanisms (20) move towards or reverse.

Description

Technical Field

[0001] This invention relates to processing technology, and more particularly to a hole processing apparatus and method. Background Technology

[0002] In the field of machining, machining curved channels is an effective solution to reduce the oil circuit resistance of hydraulic components and minimize energy loss during hydraulic oil flow. Furthermore, curved channels and other complex internal channel structures are also required in the aerospace industry, mold cooling, fluid transmission, and high-precision equipment.

[0003] However, the complexity of these channel structures presents significant challenges to machining, making it difficult to achieve precise machining using traditional cutting techniques. This is especially true for machining channels in workpieces made of high-strength materials such as titanium alloys, where the process is even more complex and difficult.

[0004] In some related technologies, the drill bit of the drilling rig uses a flexible connection or spring connection to achieve bending operations. In other related technologies, electrolytic machining equipment achieves bending operations through the kinematic coordination between the tool and the workpiece blank. Summary of the Invention

[0005] Research has shown that these related technologies are difficult to achieve high-precision bending hole processing and are also difficult to apply to complex channels.

[0006] In view of this, the present disclosure provides a hole processing apparatus and method that can achieve superior hole processing capabilities.

[0007] In one aspect of this disclosure, a channel machining apparatus is provided for machining channels within a workpiece, comprising:

[0008] A processing head for removing material from the workpiece;

[0009] At least two support mechanisms, each support mechanism being used to support the inner wall of the channel of the workpiece or to release the support on the inner wall of the channel of the workpiece, wherein the support mechanism closest to the processing head among the at least two support mechanisms is defined as the first support mechanism.

[0010] A first drive mechanism, connected between the processing head and the first support mechanism, is used to drive the processing head to adjust its steering angle relative to the first support mechanism; and

[0011] At least one second drive mechanism is connected between at least one set of two adjacent support mechanisms in the at least two support mechanisms, for driving the two adjacent support mechanisms to move toward or in opposite directions.

[0012] In some embodiments, the first drive mechanism is also used to drive the processing head toward or away from the first support mechanism.

[0013] In some embodiments, the first drive mechanism includes:

[0014] Multiple first linear drive elements, one end of each first linear drive element is connected to the first support mechanism, and the other end is rotatably connected to the processing head;

[0015] Each of the first linear drive elements independently adjusts its length by extending or retracting.

[0016] In some embodiments, at least a portion of the plurality of first linear drive elements are configured to extend or retract by different strokes to adjust the steering angle of the processing head relative to the first support mechanism; and / or, the plurality of first linear drive elements are configured to extend or retract by the same stroke to move the processing head away from or towards the first support mechanism.

[0017] In some embodiments, the second drive mechanism is also used to adjust the relative angle between the two adjacent support mechanisms.

[0018] In some embodiments, the second drive mechanism includes:

[0019] Multiple second linear drive elements, one end of each second linear drive element is rotatably connected to a support mechanism adjacent to the front side of the second linear drive element, and the other end is connected to a support mechanism adjacent to the rear side of the second linear drive element;

[0020] Each of the second linear drive elements adjusts its length independently or uniformly by extending or retracting.

[0021] In some embodiments, the plurality of second linear drive elements are configured to retract or extend by the same stroke to cause the two adjacent support mechanisms to move toward or in opposite directions; and / or, at least some of the plurality of second linear drive elements are configured to extend or retract by different strokes to cause the plurality of second linear drive elements to adjust the relative angle of the two adjacent support mechanisms.

[0022] In some embodiments, the support mechanism includes:

[0023] Support base; and

[0024] At least two telescopic components are connected to the support body and arranged circumferentially on the support body.

[0025] Each telescopic component can extend radially relative to the support base to support and fix the support mechanism relative to the inner wall of the workpiece's channel, and can retract radially relative to the support base to release the support mechanism from supporting and fixing the inner wall of the workpiece's channel, thereby making the support mechanism movable relative to the inner wall of the workpiece's channel.

[0026] In some embodiments, the processing head includes a processing electrode.

[0027] In some embodiments, the processing electrode includes an electrical discharge machining electrode or an electrochemical machining electrode.

[0028] In some embodiments, the channel processing apparatus further includes:

[0029] A power supply system, including power lines connected to the machining electrode, is configured to supply and control electrical energy to the machining electrode; and

[0030] A working fluid circulation system, including working fluid piping connected to the machining electrode, is configured to achieve continuous circulation of the working fluid relative to the machining electrode.

[0031] The processing electrode has a liquid outlet and a liquid return port. The liquid outlet is connected to the working fluid pipeline so that the processing electrode discharges the working fluid outward through the liquid outlet. The liquid return port is connected to the working fluid pipeline so that the processing electrode recovers the working fluid through the liquid return port.

[0032] In some embodiments, the working fluid line and the power line pass through the hollow area of ​​the at least two support mechanisms, the first drive mechanism, and at least one second drive mechanism.

[0033] In some embodiments, the channel processing apparatus further includes:

[0034] The controller, signal-connected to the at least two support mechanisms, the first drive mechanism, and the at least one second drive mechanism, is configured to process at least one of the straight channel segment, the curved channel segment, and the bifurcated channel segment of the workpiece through the cooperation of the at least two support mechanisms, the first drive mechanism, and the at least one second drive mechanism.

[0035] In one aspect of this disclosure, a method for machining a hole using the aforementioned hole machining apparatus is provided, comprising:

[0036] Through the cooperation of the at least two support mechanisms, the first drive mechanism, and the at least one second drive mechanism, at least one of the straight channel section, curved channel section, and bifurcated channel section of the workpiece can be processed.

[0037] In some embodiments, machining the straight passage section of the workpiece includes at least one linear feed process of the machining head; and / or, machining the curved passage section of the workpiece includes at least one directional feed process of the machining head; and / or, machining the bifurcated passage section of the workpiece includes at least one retraction process and at least one directional feed process of the machining head.

[0038] In some embodiments, the at least two support mechanisms include a first support mechanism and a second support mechanism, the second support mechanism being located on the side of the first support mechanism away from the processing head, and the second drive mechanism being connected between the first support mechanism and the second support mechanism;

[0039] The linear feed process includes:

[0040] The second support mechanism supports the inner wall of the hole in the workpiece, and the first support mechanism releases its support from the inner wall of the hole in the workpiece.

[0041] The second drive mechanism drives the first support mechanism to move in the opposite direction to the second support mechanism by a preset distance, so as to drive the processing head forward to perform channel processing;

[0042] The first support mechanism supports the inner wall of the hole in the workpiece, and the second support mechanism releases its support from the inner wall of the hole in the workpiece.

[0043] The second drive mechanism drives the second support mechanism to move a preset distance toward the second support mechanism.

[0044] In some embodiments, the at least two support mechanisms include a first support mechanism and a second support mechanism, the second support mechanism being located on the side of the first support mechanism away from the processing head, and the second drive mechanism being connected between the first support mechanism and the second support mechanism;

[0045] The steering feed process includes:

[0046] The first drive mechanism drives the processing head to adjust its steering angle relative to the first support mechanism.

[0047] The second support mechanism supports the inner wall of the hole in the workpiece, and the first support mechanism releases its support from the inner wall of the hole in the workpiece.

[0048] The second drive mechanism drives the first support mechanism to move in the opposite direction to the second support mechanism by a preset distance, so as to drive the processing head to perform hole processing according to the turning angle;

[0049] The first support mechanism supports the inner wall of the hole in the workpiece, and the second support mechanism releases its support from the inner wall of the hole in the workpiece.

[0050] The second drive mechanism drives the second support mechanism to move a preset distance toward the first support mechanism.

[0051] In some embodiments, the steering feed process further includes:

[0052] When the second drive mechanism drives the first support mechanism to move in the opposite direction to the second support mechanism by a preset distance, the relative angle between the first support mechanism and the second support mechanism is also adjusted.

[0053] In some embodiments, the at least two support mechanisms include a first support mechanism and a second support mechanism, the second support mechanism being located on the side of the first support mechanism away from the processing head, and the second drive mechanism being connected between the first support mechanism and the second support mechanism;

[0054] The return process includes:

[0055] The first support mechanism supports the inner wall of the hole in the workpiece, and the second support mechanism releases its support from the inner wall of the hole in the workpiece.

[0056] The second drive mechanism drives the second support mechanism to move in the opposite direction to the first support mechanism by a preset distance according to the hole of the workpiece;

[0057] The second support mechanism supports the inner wall of the hole in the workpiece, and the first support mechanism releases its support from the inner wall of the hole in the workpiece.

[0058] The second drive mechanism drives the first support mechanism to move a preset distance toward the second support mechanism along the hole of the workpiece, thereby causing the processing head to retract.

[0059] According to embodiments of this disclosure, at least two support mechanisms can alternately support the inner wall of the channel, fixing the channel processing device and providing a reaction force base when the second drive mechanism is driven, thereby achieving forward or backward stepping motion. In conjunction with the first drive mechanism adjusting the steering angle of the processing head relative to the first support mechanism, straight forward or backward movement can be achieved to complete straight-line processing feed and straight-line retraction for straight hole sections, and also to achieve turning processing feed and curved retraction for curved hole sections. This allows for the processing of complex channels such as curved holes, multi-segment curved holes, deep holes, and bifurcated holes in workpieces. It is beneficial to ensure the processing accuracy of curved channels by accurately adjusting the steering angle. For internal oil circuits of workpieces such as hydraulic components, this effectively reduces fluid transmission friction loss and energy consumption. Attached Figure Description

[0060] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0061] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0062] Figure 1 These are schematic diagrams of some embodiments of the hole processing apparatus according to this disclosure;

[0063] Figure 2 This is a schematic diagram of control signal connections according to an embodiment of the hole processing apparatus of this disclosure;

[0064] Figure 3 This is a structural schematic diagram of the support mechanism based on an embodiment of the hole processing device of this disclosure;

[0065] Figure 4 This is a partial structural schematic diagram of an embodiment of the hole processing apparatus disclosed herein;

[0066] Figure 5 (a)-(d) is Figure 4 Schematic diagrams of the AA section and three other section examples;

[0067] Figures 6-9 These are schematic diagrams illustrating the machining of different shaped holes HP within a workpiece WP using embodiments of the hole machining apparatus disclosed herein.

[0068] Figure 10 (a)-(d) are schematic diagrams of the linear feed process of an embodiment of the hole processing apparatus of this disclosure;

[0069] Figure 11 (a)-(d) are schematic diagrams of the feeding process of an embodiment of the hole processing apparatus of this disclosure;

[0070] Figure 12(a)-(b) are schematic diagrams of the hole processing apparatus embodiments of the present disclosure performing small-amplitude turning in different directions;

[0071] Figure 13 (a)-(b) are schematic diagrams of the hole processing apparatus embodiments of the present disclosure undergoing large-scale turning in different directions.

[0072] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components.

[0073] Explanation of reference numerals in the attached figures:

[0074] 10-Processing head; 11-Liquid outlet; 12-Liquid return port;

[0075] 20-Support mechanism; 201-Support base; 202-Telescopic assembly; 21-First support mechanism; 22-Second support mechanism;

[0076] 30 - First drive mechanism; 31 - First linear drive element;

[0077] 40 - Second drive mechanism; 41 - Second linear drive element;

[0078] 50 - Power supply system; 51 - Power supply line;

[0079] 60 - Working fluid circulation system; 61 - Working fluid piping;

[0080] 70-Controller;

[0081] HP - channel; WP - workpiece. Detailed Implementation

[0082] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0083] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0084] Unless otherwise specified, in the description of the embodiments of this disclosure, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this disclosure and simplifying the description, and are not intended to 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 this disclosure.

[0085] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0086] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0087] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, if the character " / " appears in this disclosure, it generally indicates that the preceding and following related objects have an "or" relationship.

[0088] In the description of embodiments of this disclosure, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0089] In the description of embodiments of this disclosure, the term "at least one" refers to one or more (including two), similarly, "at least one group" refers to one or more (including two) groups, and "at least one piece" refers to one or more (including two) pieces. In the description of embodiments of this disclosure, the term "at least part" refers to part or all of them.

[0090] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0091] In some related technologies, the drill bit of the drilling rig uses a flexible connection or spring connection to achieve bending operations. In other related technologies, electrolytic machining equipment achieves bending operations through the kinematic coordination between the tool and the workpiece blank.

[0092] Research has shown that these related technologies are difficult to achieve high-precision bending hole processing and are also difficult to apply to complex channels.

[0093] In view of this, the present disclosure provides a hole processing apparatus and method that can achieve superior hole processing capabilities.

[0094] Figure 1 This is a schematic diagram of the structure of some embodiments of the hole processing apparatus according to the present disclosure. (See reference) Figure 1 This disclosure provides a hole machining apparatus for machining holes HP within a workpiece WP. The hole machining apparatus includes: a machining head 10, at least two support mechanisms 20, a first drive mechanism 30, and at least one second drive mechanism 40.

[0095] The processing head 10 is used to remove material from the workpiece WP. Each support mechanism 20 is used to support or release the support of the inner wall of the channel HP of the workpiece WP, wherein the support mechanism 20 closest to the processing head 10 among the at least two support mechanisms 20 is defined as the first support mechanism 21. A first drive mechanism 30 is connected between the processing head 10 and the first support mechanism 21 for driving the processing head 10 to adjust its steering angle relative to the first support mechanism 21. At least one second drive mechanism 40 is connected between at least one set of two adjacent support mechanisms 20 for driving the two adjacent support mechanisms 20 to move toward or in opposite directions.

[0096] In this embodiment, at least two support mechanisms can alternately support the inner wall of the channel, fixing the channel processing device and providing a reaction force base when the second drive mechanism is driven, thereby realizing forward or backward stepping motion. Combined with the first drive mechanism adjusting the steering angle of the processing head relative to the first support mechanism, it can achieve straight forward or backward movement to complete the straight-line processing feed and straight-line retraction of straight hole sections, and also achieve steering processing feed and curved retraction of curved hole sections. This allows for the processing of complex channels such as curved holes, multi-segment curved holes, deep holes, and bifurcated holes in workpieces. It is beneficial to ensure the processing accuracy of curved channels by accurately adjusting the steering angle. For the internal oil circuits of workpieces such as hydraulic components, this can effectively reduce the friction loss in fluid transmission and reduce energy consumption.

[0097] The hole HP in workpiece WP can be entirely or partially machined by a hole machining device. In other words, the required hole HP can be machined step by step from the outside of the workpiece using a hole machining device with the aid of a reaction support. Alternatively, an initial hole segment can be pre-formed using other tools to accommodate the hole machining device, and then the remaining portion of the hole HP can be machined by the hole machining device. The hole machining device can be used independently or in conjunction with other tools.

[0098] The processing head 10 can remove material from the workpiece WP. The processing head 10 can perform contact or non-contact material removal processes on the workpiece WP. Contact material removal processes include mechanical cutting or grinding. For example, the processing head 10 may include a drill bit or a grinding head. Non-contact material removal processes may include electrical discharge machining (EDM) or electrochemical machining (ECM), or laser processing. In some embodiments, the processing head 10 includes a processing electrode made of a conductive material with good conductivity, such as metal, alloy, or graphite, which can be used for EDM or ECM. Accordingly, the workpiece WP is made of a conductive material, typically a metal or alloy, but may also be a non-metallic material, such as graphite.

[0099] The support mechanism 20 is used to support or release the inner wall of the channel HP of the workpiece WP. Here, the support mechanism 20's support of the inner wall of the channel HP allows for the fixation of the support mechanism 20 relative to the inner wall of the channel HP. The friction between the support mechanism 20 and the inner wall of the channel HP provides a reaction force basis for the driving action of the first or second drive mechanism. The friction also enables the channel processing device to maintain its position within the inclined or vertical channel HP, reducing the risk of unwanted slippage.

[0100] When the support mechanism 20 releases its support on the inner wall of the channel HP of the workpiece WP, there is no longer any friction between the support mechanism 20 and the inner wall, so it can be driven by the first drive mechanism or the second drive mechanism.

[0101] The first drive mechanism 30 is connected between the processing head 10 and the first support mechanism 21, and can drive the processing head 10 to adjust its turning angle relative to the first support mechanism 21. For the processing head and the first support mechanism, which have regular cross-sectional shapes, the line connecting the centers of each cross-section of the processing head is the centerline of the processing head, and the line connecting the centers of each cross-section of the first support mechanism is the centerline of the first support mechanism.

[0102] Accordingly, the turning angle here can be defined as the angle between the centerline of the processing head 10 and the centerline of the first support mechanism 21. In other embodiments, it can also be defined according to other reference points. Generally, if the turning angle of the processing head 10 relative to the first support mechanism 21 is 0°, then the centerline of the processing head 10 is parallel to or coincides with the centerline of the first support mechanism 21.

[0103] The first drive mechanism 30 drives the processing head 10 to adjust the steering angle relative to the first support mechanism 21. Here, the steering angle includes both the numerical value of the steering angle and the direction of the steering.

[0104] To achieve the adjustment of the steering angle, the first drive mechanism 30 can adopt various structural forms, such as gear transmission mechanism, linkage transmission mechanism, cam transmission mechanism or flexible shaft transmission mechanism driven by power components such as motor.

[0105] The machining head 10 and the first support mechanism 21 can be connected by a swing frame, or by multiple hydraulic cylinders with different extension and retraction strokes.

[0106] At least one second drive mechanism 40 is connected between at least one group of two adjacent support mechanisms 20, wherein the number of second drive mechanisms 40 is related to the number of support mechanisms. For two support mechanisms, one second drive mechanism 40 is provided between the two support mechanisms. For three or more support mechanisms, two or more second drive mechanisms 40 may be provided.

[0107] For three or more support mechanisms, a second drive mechanism 40 may be provided between two adjacent support mechanisms in one group, and a second drive mechanism 40 may also be provided between two adjacent support mechanisms in another group, or other structures such as a fixing frame may be used. Furthermore, for two or more second drive mechanisms 40, the structure and dimensions of each second drive mechanism 40 may be the same or different.

[0108] The second drive mechanism 40 drives the two adjacent support mechanisms 20 to move towards or in opposite directions. Moving towards each other means that the two adjacent support mechanisms 20 move closer together, with one support mechanism 20 resting on the inner wall of the channel HP while the other support mechanism 20 moves toward that support mechanism 20. Moving in opposite directions means that the two adjacent support mechanisms 20 move away from each other, with one support mechanism 20 resting on the inner wall of the channel HP while the other support mechanism 20 moves away from that support mechanism 20.

[0109] To achieve the aforementioned driving of opposite or reverse motion, the second drive mechanism 40 can adopt various structural forms, such as electric push rod, hydraulic cylinder, magnetostrictive actuator, screw and nut mechanism or gear and rack mechanism driven by power components such as motor.

[0110] refer to Figure 1 In some embodiments, the first drive mechanism 30 is also used to drive the processing head 10 closer to or away from the first support mechanism 21. In addition to steering, the first drive mechanism 30 can also drive the processing head 10 closer to or away from the first support mechanism 21, thus achieving multiple functions according to processing needs.

[0111] The overall length from the processing head 10 to the first support mechanism 21 can be adjusted by driving the processing head 10 closer to or further away from the first support mechanism 21 via the first drive mechanism 30, to adapt to the processing requirements of different channels. For example, if the overall length from the processing head 10 to the first support mechanism 21 is longer, the processing stability of the processing head 10 is enhanced, while if the overall length is shorter, it is beneficial to achieve a larger turning angle.

[0112] In addition, the first drive mechanism 30 can be used to drive the processing head 10 closer to or further away from the first support mechanism 21, which can also be used for feeding and retraction during the hole processing process.

[0113] To achieve this functionality, Figure 1 A specific structure of a first drive mechanism 30 is shown. (Reference) Figure 1In some embodiments, the first drive mechanism 30 includes a plurality of first linear drive elements 31, one end of each first linear drive element 31 being connected to the first support mechanism 21, and the other end being rotatably connected to the processing head 10. Each first linear drive element 31 can independently adjust its length by extending or retracting.

[0114] The first linear drive element 31 here may include an electric actuator, a pneumatic cylinder, or a hydraulic cylinder, etc. Multiple first linear drive elements 31 may be arranged at circumferential intervals, for example, at equal angular intervals along the circumference, which facilitates effective steering in all directions.

[0115] The first linear drive element 31 and the first support mechanism 21 can be fixedly connected or rotatably connected. The rotatable connection between the first linear drive element 31 and the processing head 10 can include a direct hinge connection or an indirect rotatable connection with the processing head 10 through an intermediate structure.

[0116] Accordingly, in some embodiments, at least some of the plurality of first linear drive elements 31 are configured to extend or retract by different strokes to adjust the steering angle of the processing head 10 relative to the first support mechanism 21. For example, when the processing head 10 needs to turn downward, the upper portion of the plurality of first linear drive elements 31 is extended or retracted, thereby causing the processing head 10 to deflect downward relative to the first support mechanism 21.

[0117] The plurality of first linear drive elements 31 can also be configured to extend or retract by the same stroke to move the processing head 10 away from or towards the first support mechanism 21. For example, when it is necessary to increase the length from the processing head 10 to the first support mechanism 21, all the first linear drive elements 31 are extended by the same stroke to move the processing head 10 away from the first support mechanism 21.

[0118] In some embodiments, the second drive mechanism 40 is also used to adjust the relative angle between the two adjacent support mechanisms 20. In addition to driving the two adjacent support mechanisms to move toward or in opposite directions, angle adjustment can also be performed to steer the processing head 10 or coordinate with the first drive mechanism 30 to steer the processing head 10, thereby achieving a larger steering angle.

[0119] To achieve this functionality, Figure 1 A specific structure of a second drive mechanism 40 is shown. (Reference) Figure 1In some embodiments, the second drive mechanism 40 includes a plurality of second linear drive elements 41, one end of each second linear drive element 41 being rotatably connected to a support mechanism 20 adjacent to the front side of the second linear drive element 41, and the other end being connected to a support mechanism 20 adjacent to the rear side of the second linear drive element 41. Each second linear drive element 41 can adjust its length independently or uniformly by extending or retracting.

[0120] The second linear drive element 41 may include an electric actuator, a pneumatic cylinder, or a hydraulic cylinder. Multiple second linear drive elements 41 may be arranged at circumferential intervals, for example, at equal angular intervals along the circumference, which facilitates effective steering in all directions.

[0121] The second linear drive element 41 can be fixedly connected to the support mechanism 20 adjacent to its rear side, or it can be rotatably connected. The rotatable connection between the second linear drive element 41 and the support mechanism 20 adjacent to its front side can include a direct hinge connection, or it can be indirectly rotatably connected to the support mechanism 20 through an intermediate structure.

[0122] Accordingly, in some embodiments, the plurality of second linear drive elements 41 are configured to retract or extend by the same stroke to cause the two adjacent support mechanisms 20 to move toward or in opposite directions. For example, during linear feed, all the second linear drive elements 41 are extended by the same stroke, thereby causing the machining head 10 to move forward to remove workpiece material in front.

[0123] At least some of the plurality of second linear drive elements 41 can extend or retract by different strokes to adjust the relative angle between the two adjacent support mechanisms 20. For example, when the processing head 10 needs to turn to the left, the first drive mechanism 30 drives the processing head 10 to deflect to the left, and the portion of the second linear drive elements 41 located on the right side extends, or the portion of the second linear drive elements 41 located on the left side retracts, thereby coordinating with the leftward deflection of the processing head 10 to cause the first support mechanism 21 to also deflect to the left, thus achieving a larger turning angle.

[0124] Taking a machining head including a machining electrode as an example, for electrical discharge machining (EDM) or electrochemical machining (ECM), the machining electrode may correspondingly include an EDM electrode or an ECM electrode. For machining heads 10 with different machining principles, corresponding supporting systems are required.

[0125] refer to Figure 1In some embodiments, the hole-making apparatus further includes a power supply system 50 and a working fluid circulation system 60. The power supply system 50 includes a power line 51 connected to the machining electrode and configured to supply and control electrical energy to the machining electrode. The working fluid circulation system 60 includes a working fluid conduit 61 connected to the machining electrode and configured to achieve continuous circulation of the working fluid relative to the machining electrode.

[0126] The processing electrode has a liquid outlet 11 and a liquid return port 12. The liquid outlet 11 is connected to the working fluid pipeline 61 so that the processing electrode discharges the working fluid through the liquid outlet 11. The liquid return port 12 is connected to the working fluid pipeline 61 so that the processing electrode recovers the working fluid through the liquid return port 12.

[0127] Taking electrical discharge machining (EDM) electrodes as an example, their working fluid is generally an insulating liquid medium, such as kerosene, emulsion, or distilled water. For electrochemical machining (ECM) electrodes, the working fluid is an electrolyte, such as NaCl solution, NaNO3 solution, or NaClO3 solution.

[0128] The working fluid circulation system 60 can drive the working fluid to flow to the processing electrode through components such as pumps and valves, and then flow out from the outlet 11 of the processing electrode. The processed working fluid returns from the return port 12 of the processing electrode for subsequent processing or recycling.

[0129] The processing electrode may have one or more liquid outlets 11 and one or more liquid return ports 12. The positions of the liquid outlets 11 and liquid return ports 12 can be set according to processing needs, such as liquid outlet on one side and liquid return on the other side, or liquid outlet in the middle and liquid return around the perimeter, etc.

[0130] To prevent the power supply line 51 and the working fluid line 61 from interfering with the support mechanism 20, the first drive mechanism 30, and the second drive mechanism 40, in some embodiments, the working fluid line 61 and the power supply line 51 pass through the hollow areas of the at least two support mechanisms 20, the first drive mechanism 30, and at least one second drive mechanism 40. This allows the support mechanisms 20, the first drive mechanism 30, and the second drive mechanism 40 to also provide protection for the power supply line 51 and the working fluid line 61. Furthermore, the power supply line 51 and the working fluid line 61 can be centrally housed within a conduit passing through the hollow area for centralized protection.

[0131] For other types of machining heads 10, one or more channels may be provided on the machining head 10 to allow the working fluid to enter or exit, or to allow the chips to exit, etc.

[0132] Figure 2 This is a schematic diagram of control signal connections according to an embodiment of the hole processing apparatus of this disclosure. (See reference) Figure 1and Figure 2 In some embodiments, the hole processing apparatus further includes a controller 70. The controller 70 is signal-connected to the at least two support mechanisms 20, the first drive mechanism 30, and the at least one second drive mechanism 40, and is configured to process at least one of the straight hole section, curved hole section, and bifurcated hole section of the workpiece WP through the cooperation of the at least two support mechanisms 20, the first drive mechanism 30, and the at least one second drive mechanism 40.

[0133] The controller 70 may include one or more control units, which may be general-purpose processors, such as CPUs, microcontrollers, microprocessors, digital signal processors, application-specific integrated circuits, field-programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. These control units can implement or execute the methods, steps, and logic block diagrams disclosed in this embodiment. The controller 70 can communicate with at least two support mechanisms 20, the first drive mechanism 30, and the at least one second drive mechanism 40 via wired or wireless means to achieve data reception and command issuance, etc.

[0134] The controller 70 can also be connected to the power supply system 50 and the working fluid circulation system 60 to control the processing progress of the machining head 10 and the circulation of the working fluid.

[0135] Figure 3 This is a structural schematic diagram of the support mechanism according to an embodiment of the hole processing apparatus of this disclosure. (Reference) Figure 3 In some embodiments, the support mechanism 20 includes a support base 201 and at least two telescopic components 202. The at least two telescopic components 202 are connected to the support base 201 and arranged circumferentially on the support base 201. Each telescopic component 202 is capable of extending radially relative to the support base 201 to support and fix the support mechanism 20 relative to the inner wall of the channel HP of the workpiece WP, and is capable of retracting radially relative to the support base 201 to release the support mechanism 20 from supporting and fixing the inner wall of the channel HP of the workpiece WP, thereby making the support mechanism 20 movable relative to the inner wall of the channel HP of the workpiece WP.

[0136] The support body 201 may have a hollow area to allow passage of the working fluid line 61 and the power line 51. The support body 201 may be connected to either the first drive mechanism 30 or the second drive mechanism 40. For the first support mechanism 21, its support body 201 is connected to both the first drive mechanism 30 and the second drive mechanism 40.

[0137] The telescopic assembly 202 may employ a mechanism capable of telescopic movement, such as a hydraulic cylinder, a pneumatic cylinder, or an electric actuator. It obtains greater friction by extending radially and pressing against the inner wall of the channel HP, and disengages from the inner wall of the channel HP when retracting radially, thereby allowing it to move relative to the channel HP.

[0138] To increase friction, the telescopic component 202 may be provided with multiple strip-shaped protrusions and concavities at the part that contacts the inner wall of the channel HP. The extension direction of each strip-shaped protrusion and concavity may be perpendicular to the extension direction of the channel HP or at an inclined angle.

[0139] Figure 4 This is a partial structural schematic diagram of an embodiment of the hole processing apparatus disclosed herein. Figure 5 (a)-(d) is Figure 4 A schematic diagram of the AA section and three other section examples is provided. The machining surface of the machining head 10 can be designed according to machining requirements, see reference. Figure 4 and Figure 5 In some embodiments, the processing surface of the processing head 10 is one of spherical, hemispherical, ellipsoidal, frustum, truncated cone, pyramidal, and prism; and / or, the cross-section of the processing head 10 is at least one of circular, elliptical, and polygonal.

[0140] exist Figure 4 In the middle, the machining surface of the machining head 10 is hemispherical, and its cross-section is circular (see reference). Figure 5 (a)). In other embodiments, the processing surface of the processing head 10 may also be spherical, ellipsoidal, frustum-shaped, truncated cone-shaped, pyramidal, or prism-shaped. Figure 5 Examples of the processing head 10 having an elliptical, square, and octagonal cross-section are shown in (b)-(d), respectively.

[0141] Based on the above embodiments of the hole processing apparatus of this disclosure, in one aspect of this disclosure, a hole processing method of the aforementioned hole processing apparatus is also provided. The hole processing method includes: processing at least one of a straight hole section, a curved hole section, and a bifurcated hole section of the workpiece WP through the cooperation of the at least two support mechanisms 20, the first drive mechanism 30, and the at least one second drive mechanism 40.

[0142] The steps of the hole machining method here can be implemented by the controller 70 issuing control commands to at least two support mechanisms 20, the first drive mechanism 30, and the at least one second drive mechanism 40. The hole machining method of this embodiment can realize the machining of at least one of the straight hole segments, curved hole segments, and bifurcated hole segments of the workpiece WP, thus meeting the machining requirements of complex holes such as curved holes, multi-segment curved holes, deep holes, and bifurcated holes in the workpiece.

[0143] Figures 6-9 These are schematic diagrams illustrating the machining of different shaped channels HP within a workpiece WP using embodiments of the channel machining apparatus disclosed herein. (Reference) Figures 6-8 The hole processing device can process complex holes such as straight holes, unidirectional curved holes, wavy curved holes, and bifurcated holes within the same plane. (Reference) Figure 9 The hole processing device can also realize curved holes in a spatial range, where the different parts of the curved hole are not completely in the same plane.

[0144] For the various complex channels mentioned above, they can be composed of one or more combinations of basic straight channel segments, curved channel segments, and bifurcated channel segments. For example... Figure 6 The channel HP may include a straight channel segment and an arc-shaped curved channel segment connected in sequence. Figure 7 The channel HP may include a transverse straight channel segment, an arc-shaped curved channel segment, and a vertical straight channel segment connected in sequence. Figure 8 The channel HP may include a transverse straight channel section, a bifurcated channel section, a vertical straight channel section, and an arc-shaped curved channel section. In other words, the channel processing apparatus disclosed herein can meet the processing needs of various complex channels HP, and has superior channel processing capabilities for both simple and complex channels.

[0145] For the machining of the aforementioned straight channel sections, curved channel sections, and bifurcated channel sections, in some embodiments, the machining of the straight channel section of the workpiece WP includes at least one linear feed process of the machining head 10; and / or, the machining of the curved channel section of the workpiece WP includes at least one directional feed process of the machining head 10; and / or, the machining of the bifurcated channel section of the workpiece WP includes at least one retraction process and at least one directional feed process of the machining head 10. Here, "at least one" includes one or more.

[0146] For machining the branched channel section of the WP, after machining a straight or curved channel section, the machining head 10 is adjusted to the position where it is to branch through at least one retraction process. This retraction is a movement along the direction of the existing channel, which can be a straight retraction or a curved retraction. At the position where the branch is to be formed, at least one turning feed process is performed to make the angle of the machining head 10 form an angle with the extension direction of the existing channel, thereby machining another branch channel.

[0147] Figure 10 (a)-(d) are schematic diagrams illustrating the linear feed process of an embodiment of the hole machining apparatus of this disclosure. (See reference) Figure 10In some embodiments, the at least two support mechanisms 20 include a first support mechanism 21 and a second support mechanism 22, the second support mechanism 22 being located on the side of the first support mechanism 21 away from the processing head 10, and the second drive mechanism 40 being connected between the first support mechanism 21 and the second support mechanism 22.

[0148] Accordingly, the linear feed process may include the following steps.

[0149] refer to Figure 10 (a) causes the second support mechanism 22 to support the inner wall of the channel HP of the workpiece WP, and causes the first support mechanism 21 to release the support of the inner wall of the channel HP of the workpiece WP.

[0150] refer to Figure 10 (b) causes the second drive mechanism 40 to drive the first support mechanism 21 to move in the opposite direction to the second support mechanism 22 by a predetermined distance, thereby driving the processing head 10 forward to perform channel processing. The arrow in the figure shows that the foremost tip of the processing head 10 has moved forward by the predetermined distance.

[0151] refer to Figure 10 (c) causes the first support mechanism 21 to support the inner wall of the channel HP of the workpiece WP, and causes the second support mechanism 22 to release the support of the inner wall of the channel HP of the workpiece WP.

[0152] refer to Figure 10 (d) causes the second drive mechanism 40 to drive the second support mechanism 22 to move a preset distance toward the second support mechanism 22. The arrow in the figure shows that the rear end of the second support mechanism 22 has moved forward a preset distance.

[0153] Figure 11 Figures (a)-(d) are schematic diagrams illustrating the feeding process of an embodiment of the hole machining apparatus of this disclosure. (See reference) Figure 11 In some embodiments, the at least two support mechanisms 20 include a first support mechanism 21 and a second support mechanism 22, the second support mechanism 22 being located on the side of the first support mechanism 21 away from the processing head 10, and the second drive mechanism 40 being connected between the first support mechanism 21 and the second support mechanism 22.

[0154] Accordingly, the return process may include the following steps.

[0155] refer to Figure 11 (a) causes the first support mechanism 21 to support the inner wall of the channel HP of the workpiece WP, and causes the second support mechanism 22 to release the support of the inner wall of the channel HP of the workpiece WP.

[0156] refer to Figure 11 (b) causes the second drive mechanism 40 to drive the second support mechanism 22 to move a predetermined distance in the opposite direction to the first support mechanism 21 according to the hole HP of the workpiece WP. The arrow in the figure shows that the rear end of the second support mechanism 22 has moved backward a predetermined distance.

[0157] refer to Figure 11 (c) causes the second support mechanism 22 to support the inner wall of the channel HP of the workpiece WP, and causes the first support mechanism 21 to release the support of the inner wall of the channel HP of the workpiece WP.

[0158] refer to Figure 11 (d) causes the second drive mechanism 40 to drive the first support mechanism 21 to move a preset distance toward the second support mechanism 22 according to the hole HP of the workpiece WP, so as to drive the processing head 10 to retract. The arrow in the figure shows that the foremost part of the processing head 10 has moved backward a preset distance.

[0159] Figure 12 Images (a)-(b) are schematic diagrams illustrating small-amplitude turning in different directions according to embodiments of the hole processing apparatus of this disclosure. (See reference) Figure 12 In some embodiments, the at least two support mechanisms 20 include a first support mechanism 21 and a second support mechanism 22, the second support mechanism 22 being located on the side of the first support mechanism 21 away from the processing head 10, and the second drive mechanism 40 being connected between the first support mechanism 21 and the second support mechanism 22.

[0160] Accordingly, the steering feed process includes the following steps.

[0161] The first drive mechanism 30 drives the processing head 10 to adjust its steering angle relative to the first support mechanism 21. Figure 12 In (a) and (b), the actions of the first drive mechanism 30 driving the processing head 10 to turn upward and downward relative to the first support mechanism 21 are shown.

[0162] The second support mechanism 22 supports the inner wall of the channel HP of the workpiece WP, and the first support mechanism 21 releases its support from the inner wall of the channel HP of the workpiece WP. (See reference here.) Figure 10 (a). In addition, this step can be performed before or after the previous step, or it can be performed simultaneously with the previous step.

[0163] The second drive mechanism 40 drives the first support mechanism 21 to move in the opposite direction to the second support mechanism 22 by a preset distance, so as to drive the processing head 10 to perform channel processing according to the turning angle. (See reference here.) Figure 10 of (b).

[0164] Make the first support mechanism 21 support the inner wall of the hole passage HP of the workpiece WP, and make the second support mechanism 22 release the support for the inner wall of the hole passage HP of the workpiece WP. Reference can be made here to Figure 10 of (c).

[0165] Make the second driving mechanism 40 drive the second support mechanism 22 to move a preset distance towards the first support mechanism 21. Reference can be made here to Figure 10 of (d).

[0166] Figure 13 Figures (a)-(b) are schematic diagrams of the large-scale turning in different directions of the hole processing device embodiment of the present disclosure. Reference Figure 13 , in some embodiments, the turning and feeding process further includes: when making the second driving mechanism 40 drive the first support mechanism 21 to move a preset distance in the opposite direction relative to the second support mechanism 22, adjusting the relative angle between the first support mechanism 21 and the second support mechanism 22.

[0167] In Figure 13 Figures (a) and (b), it is shown that the second driving mechanism 40 adjusts the relative angle between the first support mechanism 21 and the second support mechanism 2, so as to cooperate with the upward turning and downward turning actions of the processing head 10 relative to the first support mechanism 21, so that a larger turning angle can be obtained.

[0168] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0169] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A hole-machining apparatus for machining holes (HP) within a workpiece (WP), characterized in that, include: A processing head (10) is used to remove material from the workpiece (WP); At least two support mechanisms (20), each support mechanism (20) is used to support the inner wall of the channel (HP) of the workpiece (WP) or to release the support of the inner wall of the channel (HP) of the workpiece (WP), wherein the support mechanism (20) closest to the processing head (10) among the at least two support mechanisms (20) is defined as the first support mechanism (21). A first drive mechanism (30) is connected between the processing head (10) and the first support mechanism (21) for driving the processing head (10) to adjust the steering angle relative to the first support mechanism (21); and At least one second drive mechanism (40) is connected between at least one set of two adjacent support mechanisms (20) in the at least two support mechanisms (20) for driving the two adjacent support mechanisms (20) to move toward or in opposite directions; The first driving mechanism (30) is further used to drive the processing head (10) closer to or further away from the first support mechanism (21), and the second driving mechanism (40) is further used to adjust the relative angle between the two adjacent support mechanisms (20). The processing head (10) includes a processing electrode. The hole processing device further includes: The working fluid circulation system (60), including a working fluid line (61) connected to the processing electrode, is configured to achieve continuous circulation of the working fluid relative to the processing electrode. The processing electrode has an outlet (11) and a return port (12). The outlet (11) is connected to the working fluid pipeline (61) so that the processing electrode discharges the working fluid outward through the outlet (11). The return port (12) is connected to the working fluid pipeline (61) so that the processing electrode recovers the working fluid through the return port (12).

2. The hole processing apparatus according to claim 1, characterized in that, The first drive mechanism (30) includes: Multiple first linear drive elements (31), one end of each first linear drive element (31) is connected to the first support mechanism (21), and the other end is rotatably connected to the processing head (10); Each of the first linear drive elements (31) independently adjusts its length by extending or retracting.

3. The hole processing apparatus according to claim 2, characterized in that, At least some of the plurality of first linear drive elements (31) are configured to extend or retract by different strokes to adjust the steering angle of the processing head (10) relative to the first support mechanism (21); and / or, the plurality of first linear drive elements (31) are configured to extend or retract by the same stroke to move the processing head (10) away from or closer to the first support mechanism (21).

4. The hole processing apparatus according to claim 1, characterized in that, The second drive mechanism (40) includes: Multiple second linear drive elements (41), one end of each second linear drive element (41) is rotatably connected to the support mechanism (20) adjacent to the front side of the second linear drive element (41), and the other end is connected to the support mechanism (20) adjacent to the rear side of the second linear drive element (41); Each of the second linear drive elements (41) adjusts its length independently or uniformly by extending or retracting.

5. The hole processing apparatus according to claim 4, characterized in that, The plurality of second linear drive elements (41) are configured to retract or extend by the same stroke to cause the two adjacent support mechanisms (20) to move toward or in opposite directions; and / or, at least some of the plurality of second linear drive elements (41) are configured to extend or retract by different strokes to cause the plurality of second linear drive elements (41) to adjust the relative angle of the two adjacent support mechanisms (20).

6. The hole processing apparatus according to claim 1, characterized in that, The support mechanism (20) includes: Support base (201); At least two telescopic components (202) are connected to the support body (201) and arranged circumferentially on the support body (201). Each telescopic component (202) can extend radially relative to the support body (201) to support and fix the support mechanism (20) relative to the inner wall of the hole (HP) of the workpiece (WP), and can retract radially relative to the support body (201) to release the support mechanism (20) from supporting and fixing the inner wall of the hole (HP) of the workpiece (WP), thereby making the support mechanism (20) movable relative to the inner wall of the hole (HP) of the workpiece (WP).

7. The hole processing apparatus according to claim 1, characterized in that, The processing electrode includes an electrical discharge machining electrode or an electrochemical machining electrode.

8. The hole processing apparatus according to claim 1, characterized in that, Also includes: The power supply system (50) includes a power line (51) connected to the processing electrode and is configured to provide and control electrical energy to the processing electrode.

9. The hole processing apparatus according to claim 8, characterized in that, The working fluid line (61) and the power line (51) pass through the hollow area of ​​the at least two support mechanisms (20), the first drive mechanism (30) and at least one second drive mechanism (40).

10. The hole processing apparatus according to claim 1, characterized in that, Also includes: The controller (70), which is signal-connected to the at least two support mechanisms (20), the first drive mechanism (30) and the at least one second drive mechanism (40), is configured to process at least one of the straight channel segment, the curved channel segment and the bifurcated channel segment of the workpiece (WP) through the cooperation of the at least two support mechanisms (20), the first drive mechanism (30) and the at least one second drive mechanism (40).

11. A method for machining a hole using a hole machining apparatus according to any one of claims 1-10, characterized in that, include: Through the cooperation of the at least two support mechanisms (20), the first drive mechanism (30) and the at least one second drive mechanism (40), at least one of the straight channel section, curved channel section and bifurcated channel section of the workpiece (WP) is processed.

12. The method for machining a channel according to claim 11, characterized in that, The machining of the straight passage section of the workpiece (WP) includes at least one linear feed process of the machining head (10); and / or, the machining of the curved passage section of the workpiece (WP) includes at least one turning feed process of the machining head (10); and / or, the machining of the bifurcated passage section of the workpiece (WP) includes at least one retraction process and at least one turning feed process of the machining head (10).

13. The method for machining a channel according to claim 12, characterized in that, The at least two support mechanisms (20) include a first support mechanism (21) and a second support mechanism (22), the second support mechanism (22) being located on the side of the first support mechanism (21) away from the processing head (10), and the second drive mechanism (40) being connected between the first support mechanism (21) and the second support mechanism (22); The linear feed process includes: The second support mechanism (22) supports the inner wall of the channel (HP) of the workpiece (WP), and the first support mechanism (21) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the first support mechanism (21) to move in the opposite direction to the second support mechanism (22) by a predetermined distance, so as to drive the processing head (10) forward to perform channel processing; The first support mechanism (21) supports the inner wall of the channel (HP) of the workpiece (WP), and the second support mechanism (22) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the second support mechanism (22) to move a preset distance toward the second support mechanism (22).

14. The method for machining a channel according to claim 12, characterized in that, The at least two support mechanisms (20) include a first support mechanism (21) and a second support mechanism (22), the second support mechanism (22) being located on the side of the first support mechanism (21) away from the processing head (10), and the second drive mechanism (40) being connected between the first support mechanism (21) and the second support mechanism (22); The steering feed process includes: The first drive mechanism (30) drives the processing head (10) to adjust the steering angle relative to the first support mechanism (21); The second support mechanism (22) supports the inner wall of the channel (HP) of the workpiece (WP), and the first support mechanism (21) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the first support mechanism (21) to move in the opposite direction to the second support mechanism (22) by a preset distance, so as to drive the processing head (10) to perform channel processing according to the turning angle; The first support mechanism (21) supports the inner wall of the channel (HP) of the workpiece (WP), and the second support mechanism (22) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the second support mechanism (22) to move a preset distance toward the first support mechanism (21).

15. The method for machining a channel according to claim 14, characterized in that, The steering feed process also includes: When the second drive mechanism (40) drives the first support mechanism (21) to move in the opposite direction to the second support mechanism (22) by a preset distance, the relative angle between the first support mechanism (21) and the second support mechanism (22) is also adjusted.

16. The method for machining a channel according to claim 12, characterized in that, The at least two support mechanisms (20) include a first support mechanism (21) and a second support mechanism (22), the second support mechanism (22) being located on the side of the first support mechanism (21) away from the processing head (10), and the second drive mechanism (40) being connected between the first support mechanism (21) and the second support mechanism (22); The return process includes: The first support mechanism (21) supports the inner wall of the channel (HP) of the workpiece (WP), and the second support mechanism (22) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the second support mechanism (22) to move a preset distance in the opposite direction to the first support mechanism (21) according to the hole (HP) of the workpiece (WP); The second support mechanism (22) supports the inner wall of the channel (HP) of the workpiece (WP), and the first support mechanism (21) releases the support of the inner wall of the channel (HP) of the workpiece (WP). The second drive mechanism (40) drives the first support mechanism (21) to move a preset distance toward the second support mechanism (22) according to the hole (HP) of the workpiece (WP), so as to drive the processing head (10) to move backward.

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