Hole milling device

Abstract

The invention relates to the technical field of ship machining, in particular to a hole milling device. The hole milling device comprises a base, a cantilever driving mechanism, a cantilever, a steering mechanism and a hole milling executing mechanism, the cantilever driving mechanism is installed on the base and is in transmission connection with the cantilever, and the steering mechanism is installed on the cantilever and is in transmission connection with the hole milling executing mechanism. The hole milling executing mechanism comprises a milling cutter driving source and a milling cutter installed at the power output end of the milling cutter driving source. The steering mechanism is configured to be capable of driving the hole milling executing mechanism to rotate relative to the cantilever, so that a tool bit of the milling cutter faces a to-be-milled hole surface on the workpiece; the cantilever driving mechanism is configured to be capable of driving the cantilever to move relative to the base so that the milling cutter can move on the face to be subjected to hole milling and conduct hole milling. According to the hole milling device, automatic hole milling machining can be conducted on a large workpiece, the machining efficiency and the machining precision are improved, and the labor intensity of workers is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship processing, and in particular to a milling hole device. Background Art

[0002] The ship processing structure, also known as the "hull structure", refers to the general term for the hull structure composed of plates and skeletons, etc., mainly including the bottom structure, side structure, deck structure, bulkhead structure, bow and stern structures, and superstructure, etc. When building the hull structure, the entire ship structure is divided into multiple components along the length direction of the hull, specifically including the bow, stern, and the mid-body part located between the bow and the stern. Among them, when processing the stern, threaded holes need to be processed inside and outside the stern.

[0003] Due to the large size of the stern, conventional milling hole equipment is not suitable for milling hole processing of the stern. Currently, manual punching is usually used to process the threaded holes of the stern. This method has defects such as high labor intensity, low processing efficiency, and low processing accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a milling hole device to solve the technical problems such as high labor intensity, low processing efficiency, and low processing accuracy existing in processing workpieces by manual punching.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A milling hole device includes a base, a cantilever driving mechanism, a cantilever, a steering mechanism, and a milling hole executing mechanism. Among them, the cantilever driving mechanism is installed on the base and is in transmission connection with the cantilever. The steering mechanism is installed on the cantilever and is in transmission connection with the milling hole executing mechanism. The milling hole executing mechanism includes a milling cutter driving source and a milling cutter installed at the power output end of the milling cutter driving source; The steering mechanism is configured to be able to drive the milling hole executing mechanism to rotate relative to the cantilever, so that the cutting head of the milling cutter faces the surface of the workpiece to be milled; the cantilever driving mechanism is configured to be able to drive the cantilever to move relative to the base, so that the milling cutter moves on the surface of the workpiece to be milled and mills the hole.

[0006] Further, the two ends of the cantilever along its length direction are respectively a fixed end and a free end, and the fixed end of the cantilever is in transmission connection with the cantilever driving mechanism; The steering mechanism includes a steering driving source. The body of the steering driving source is fixedly installed at the free end of the cantilever, and the power output end of the steering driving source is in transmission connection with the body of the milling cutter driving source.

[0007] Furthermore, the milling actuator further comprises a milling cutter mounting seat, the milling cutter mounting seat is transmission-connected to the power output end of the steering drive source, and the body of the milling cutter drive source is fixedly mounted on the milling cutter mounting seat; The steering mechanism also includes a first bearing connected between the cantilever and the milling cutter mounting seat.

[0008] Furthermore, the cantilever drive mechanism includes an axial drive assembly and a movable frame, the axial drive assembly is mounted on the base and is transmission-connected to the movable frame, and the cantilever is connected to the movable frame; the axial drive assembly is configured to drive the movable frame and the cantilever to move simultaneously in a first direction relative to the base.

[0009] Furthermore, the cantilever drive mechanism also includes a slewing drive assembly, which is mounted on the mobile frame and is transmission-connected to the cantilever; the slewing drive assembly is configured to drive the cantilever to rotate relative to the mobile frame, and the slewing centerline of the cantilever is parallel to the first direction.

[0010] Further, the rotary drive assembly includes a rotary drive source, a driving gear and a driven gear, wherein: The body of the rotary drive source is fixedly mounted on the mobile frame; The driving gear is drivingly connected to the power output end of the rotary driving source and meshes with the driven gear; The driven gear is rotatably mounted on the moving frame and connected to the cantilever.

[0011] Furthermore, the cantilever drive mechanism also includes a cross slide assembly, which is connected between the rotary drive assembly and the cantilever; the cross slide assembly is configured to drive the cantilever to move in any direction within a preset plane relative to the rotary drive assembly, and the preset plane is perpendicular to the rotation centerline of the cantilever.

[0012] Furthermore, the cross slide assembly includes a first slide and a second slide, the first slide is transmission-connected to the rotary drive assembly, the second slide is slidably mounted on the first slide along a second direction, and the cantilever is slidably mounted on the second slide along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0013] Further, a first driving structure is provided on the first slide, and the first driving structure includes a first driving source, a first lead screw and a first nut, the body of the first driving source is fixedly mounted on the first slide, the first lead screw is rotatably mounted on the first slide and is transmission-connected to the power output end of the first driving source, and the first nut is threadedly connected to the first lead screw and fixedly connected to the second slide; And / or, a second driving structure is provided on the second slide, the second driving structure includes a second driving source, a second screw and a second nut, the body of the second driving source is fixedly mounted on the second slide, the second screw is rotatably mounted on the second slide and is transmission-connected to the power output end of the second driving source, and the second nut is threadedly connected to the second screw and fixedly connected to the cantilever.

[0014] Furthermore, a guide assembly is provided between the base and the movable frame and / or between the first slide and the second slide and / or between the second slide and the cantilever.

[0015] Beneficial effects of the present invention: The milling device provided by the present invention comprises a base, a cantilever driving mechanism, a cantilever, a steering mechanism and a milling actuator, wherein the cantilever driving mechanism is mounted on the base and is transmission-connected to the cantilever, the steering mechanism is mounted on the cantilever and is transmission-connected to the milling actuator, and the milling actuator comprises a milling cutter driving source and a milling cutter mounted at the power output end of the milling cutter driving source; the steering mechanism is configured to be able to drive the milling actuator to rotate relative to the cantilever so that the cutter head of the milling cutter faces the surface to be milled on the workpiece; the cantilever driving mechanism is configured to be able to drive the cantilever to move relative to the base so that the milling cutter moves on the surface to be milled and mills holes. The milling device provided by the present application can automatically mill large workpieces, improve processing efficiency and processing accuracy, and reduce manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a hole milling device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the three-dimensional structure of a cantilever and a steering mechanism provided in an embodiment of the present invention; Figure 33D structural schematic diagram of the hole milling actuator provided by an embodiment of the present invention; Figure 4 is Figure 1 the enlarged view of part A in Figure 5 3D structural schematic diagram of the rotary drive assembly provided by an embodiment of the present invention; Figure 6 Assembly structural schematic diagram of the first drive source, the first lead screw and the first nut provided by an embodiment of the present invention; Figure 7 Position schematic diagram of the milling cutter when the hole milling device provided by an embodiment of the present invention mills a hole on the outer end face of the workpiece; Figure 8 Position schematic diagram of the milling cutter when the hole milling device provided by an embodiment of the present invention mills a hole on the inner end face of the workpiece; Figure 9 Overall schematic diagram when the hole milling device provided by an embodiment of the present invention mills a hole on the outer end face of the workpiece; Figure 10 Overall schematic diagram when the hole milling device provided by an embodiment of the present invention mills a hole on the inner end face of the workpiece.

[0018] Icon: 1 - Base; 2 - Cantilever drive mechanism; 21 - Axial drive assembly; 22 - Moving frame; 23 - Rotary drive assembly; 231 - Rotary drive source; 232 - Driving gear; 233 - Driven gear; 234 - Second bearing; 235 - Rotary table; 24 - Cross slide assembly; 241 - First slide; 242 - Second slide; 243 - First drive source; 244 - First lead screw; 245 - First nut; 25 - Guide assembly; 3 - Cantilever; 4 - Steering mechanism; 41 - Steering drive source; 42 - First bearing; 5 - Hole milling actuator; 51 - Milling cutter drive source; 52 - Milling cutter; 53 - Milling cutter mounting seat; 531 - Connecting boss; 54 - Hole milling main shaft; 100 - Workpiece. Detailed implementation manners

[0019] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Aiming at the technical problems of high labor intensity, low processing efficiency, and low processing accuracy existing in the processing of large workpieces such as the stern by manual drilling, the present invention provides a milling hole device. Referring to Figure 1 , the milling hole device includes a base 1, a cantilever driving mechanism 2, a cantilever 3, a steering mechanism 4, and a milling hole executing mechanism 5. Among them, the cantilever driving mechanism 2 is installed on the base 1 and is in transmission connection with the cantilever 3. The steering mechanism 4 is installed on the cantilever 3 and is in transmission connection with the milling hole executing mechanism 5. The milling hole executing mechanism 5 includes a milling cutter driving source 51 and a milling cutter 52 installed at the power output end of the milling cutter driving source 51; The steering mechanism 4 is configured to be able to drive the milling hole executing mechanism 5 to rotate relative to the cantilever 3 so that the cutting head of the milling cutter 52 faces the surface to be milled on the workpiece 100. The cantilever driving mechanism 2 is configured to be able to drive the cantilever 3 to move relative to the base 1 so that the milling cutter 52 moves on the surface to be milled and mills the hole.

[0023] Referring to Figures 7 to 10 , the surface to be milled on the workpiece 100 can be one or more of the outer end face, outer peripheral face, inner end face, and inner peripheral face of the workpiece 100. As shown in Figure 7 and Figure 9 , when milling a hole on the outer end face of the workpiece 100, place the cantilever 3 at the end of the workpiece 100 and control the steering mechanism 4 to drive the milling hole executing mechanism 5 to rotate relative to the cantilever 3 to a position of 0°. At this time, the cutting head of the milling cutter 52 faces the outer end face of the workpiece 100. As shown in Figure 8 and Figure 10As shown, when milling a hole on the inner end face of the workpiece 100, the control unit drives the cantilever driving mechanism 2 to drive the cantilever 3 to extend into the workpiece 100, and controls the steering mechanism 4 to drive the hole milling actuator 5 to rotate relative to the cantilever 3 to a position of 180°. At this time, the cutting head of the milling cutter 52 faces the inner end face of the workpiece 100.

[0024] As described above, the hole milling device provided by the present application can automatically mill holes for large workpieces such as the stern of a ship, improving the processing efficiency and accuracy, and reducing the labor intensity of workers. It should be noted that the hole milling device provided by the present application can perform drilling, threaded hole machining, and counterboring, and different tools can be replaced according to different hole machining requirements. The present application does not limit the type of hole machining.

[0025] Refer to Figure 2 and Figure 3 In some embodiments, the two ends of the cantilever 3 along its length direction are respectively a fixed end and a free end, and the fixed end of the cantilever 3 is in transmission connection with the cantilever driving mechanism 2; The steering mechanism 4 includes a steering driving source 41. The body of the steering driving source 41 is fixedly installed at the free end of the cantilever 3, and the power output end of the steering driving source 41 is in transmission connection with the body of the milling cutter driving source 51, and is configured to drive the milling cutter driving source 51 to rotate so that the cutting head of the milling cutter 52 faces the surface to be milled.

[0026] In some embodiments, the hole milling actuator 5 further includes a milling cutter mounting seat 53. The milling cutter mounting seat 53 is in transmission connection with the power output end of the steering driving source 41, and the body of the milling cutter driving source 51 is fixedly installed on the milling cutter mounting seat 53. In order to transmit power to the milling cutter 52, the hole milling actuator 5 further includes a hole milling main shaft 54. The milling cutter driving source 51 can be a motor. The milling cutter driving source 51 is connected to one end of the hole milling main shaft 54 through a speed reducer fixedly installed on the milling cutter mounting seat 53, and the other end of the hole milling main shaft 54 is connected to the end of the milling cutter 52 away from the cutting head. In this way, the power of the milling cutter driving source 51 is transmitted to the milling cutter 52 through the speed reducer and the hole milling main shaft 54, and the milling cutter 52 can be driven to rotate for hole milling.

[0027] In some embodiments, the steering mechanism 4 further includes a first bearing 42 connected between the cantilever 3 and the cutter mounting seat 53. Specifically, the cantilever 3 has a hollow structure, the cutter driving source 51 is installed inside the cantilever 3, and a connection through hole is provided at a position on the side wall of the cantilever 3 corresponding to the power output end of the cutter driving source 51; a connection boss 531 is provided on the end face of the cutter mounting seat 53 away from the cutter driving source 51, and the connection boss 531 is fixedly connected to the power output end of the cutter driving source 51 through the connection through hole; the first bearing 42 can be a precision crossed roller bearing, the inner ring of the first bearing 42 is fixedly sleeved on the connection boss 531, and the outer ring of the first bearing 42 is fixedly embedded in the connection through hole. The cooperation between the inner ring and the outer ring of the first bearing 42 can ensure that the hole milling actuator 5 can turn smoothly.

[0028] Continuing to refer to Figure 1 , the cantilever driving mechanism 2 includes an axial driving assembly 21 and a moving frame 22. The axial driving assembly 21 is installed on the base 1 and is in transmission connection with the moving frame 22, and the cantilever 3 is connected to the moving frame 22; the axial driving assembly 21 is configured to drive the moving frame 22 and the cantilever 3 to move relative to the base 1 along a first direction at the same time. In this embodiment, the first direction, the length direction of the cantilever 3, and the axial direction of the cutter 52 are parallel. In this way, the axial driving assembly 21 can drive the cantilever 3 to extend into or move out of the workpiece 100, and can also drive the cutter 52 to move along the axial direction of the cutter 52.

[0029] Referring to Figure 4 , in some embodiments, the cantilever driving mechanism 2 further includes a rotary driving assembly 23. The rotary driving assembly 23 is installed on the moving frame 22 and is in transmission connection with the cantilever 3; the rotary driving assembly 23 is configured to drive the cantilever 3 to rotate relative to the moving frame 22, and the rotation center line of the cantilever 3 is parallel to the first direction.

[0030] Referring to Figure 5 , in some embodiments, the rotary driving assembly 23 includes a rotary driving source 231, a driving gear 232, and a driven gear 233, where: The body of the rotary driving source 231 is fixedly installed on the moving frame 22; The driving gear 232 is in transmission connection with the power output end of the rotary driving source 231 and meshes with the driven gear 233; The driven gear 233 is rotatably installed on the moving frame 22 and is connected to the cantilever 3.

[0031] Optionally, the number of slewing drive sources 231 is one or two. Exemplarily, the number of slewing drive sources 231 is two. The power output end of each slewing drive source 231 is connected with a driving gear 232 through a speed reducer. The two driving gears 232 are respectively meshed with two different positions of the driven gear 233. The cantilever 3 can be slewed more smoothly by the two slewing drive sources 231.

[0032] Furthermore, the slewing drive assembly 23 further includes a second bearing 234 and a slewing table 235, wherein: the second bearing 234 is a crossed roller turntable bearing. The outer ring of the second bearing 234 is fixedly connected with the driven gear 233, and the inner ring of the second bearing 234 is fixedly connected with the moving frame 22; the slewing table 235 is fixedly connected with the driven gear 233 and the outer ring of the second bearing 234. The fixed end of the cantilever 3 is connected to the slewing table 235.

[0033] Continue to refer to Figure 4 , in some embodiments, the cantilever drive mechanism 2 further includes a cross slide table assembly 24. The cross slide table assembly 24 is connected between the slewing drive assembly 23 and the cantilever 3; the cross slide table assembly 24 is configured to drive the cantilever 3 to move in any direction in a preset plane relative to the slewing drive assembly 23, and the preset plane is perpendicular to the slewing center line of the cantilever 3.

[0034] Specifically, the cross slide table assembly 24 includes a first slide table 241 and a second slide table 242. The first slide table 241 is in transmission connection with the slewing drive assembly 23 (in this embodiment, the first slide table 241 is fixedly installed on the slewing table 235). The second slide table 242 is slidably installed on the first slide table 241 along a second direction, and the cantilever 3 is slidably installed on the second slide table 242 along a third direction; wherein, the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0035] Refer to Figure 6 , in some embodiments, a first driving structure is provided on the first slide table 241. The first driving structure includes a first driving source 243, a first lead screw 244 and a first nut 245. The body of the first driving source 243 is fixedly installed on the first slide table 241. The first lead screw 244 is rotatably installed on the first slide table 241 and is in transmission connection with the power output end of the first driving source 243. The first nut 245 is screwed on the first lead screw 244 and is fixedly connected with the second slide table 242; and / or, a second driving structure is provided on the second slide table 242. The second driving structure includes a second driving source, a second lead screw and a second nut. The body of the second driving source is fixedly installed on the second slide table. The second lead screw is rotatably installed on the second slide table and is in transmission connection with the power output end of the second driving source. The second nut is screwed on the second lead screw and is fixedly connected with the cantilever 3.

[0036] In the above settings, the driving source drives the lead screw to rotate, and the nut can perform reciprocating linear motion by means of screw drive. The first lead screw 244 and the second lead screw are arranged in a cross-cross manner, so that the cantilever 3 can move in any direction in the longitudinal plane.

[0037] Optionally, a guiding assembly 25 is provided between the base 1 and the moving frame 22 and / or between the first sliding table 241 and the second sliding table 242 and / or between the second sliding table 242 and the cantilever 3. Taking the guiding assembly 25 provided between the base 1 and the moving frame 22 as an example, the guiding assembly 25 includes a guide rail and a slider slidably disposed on the guide rail. Among them, the guide rail is fixedly installed on the base 1, and the slider is fixedly installed on the moving frame 22. Such a setting can limit the moving trajectory of the moving frame 22 relative to the base 1 through the guide rail and the slider.

[0038] During the working process of the above device, the axial driving assembly 21 and the cross slide table assembly 24 can drive the hole milling actuator 5 to reach the designated position. The rotary driving assembly 23 can drive the hole milling actuator 5 to perform circular motion. The steering mechanism 4 can drive the cutting head of the milling cutter 52 to face the surface of the workpiece to be milled, so that the inner and outer sides of the workpiece 100 can be milled, reducing the manual labor intensity and improving the machining accuracy and efficiency.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A milling device, characterized in that: The invention comprises a base (1), a cantilever drive mechanism (2), a cantilever (3), a steering mechanism (4) and a milling hole actuator (5), wherein the cantilever drive mechanism (2) is mounted on the base (1) and is transmission-connected to the cantilever (3), the steering mechanism (4) is mounted on the cantilever (3) and is transmission-connected to the milling hole actuator (5), and the milling hole actuator (5) comprises a milling cutter drive source (51) and a milling cutter (52) mounted at a power output end of the milling cutter drive source (51); The steering mechanism (4) is configured to be able to drive the milling actuator (5) to rotate relative to the cantilever (3), so that the tool head of the milling cutter (52) faces the surface to be milled on the workpiece (100); the cantilever drive mechanism (2) is configured to be able to drive the cantilever (3) to move relative to the base (1), so that the milling cutter (52) moves on the surface to be milled and mills the hole.

2. The milling device according to claim 1, characterized in that: The two ends of the cantilever (3) along its length direction are respectively a fixed end and a free end, and the fixed end of the cantilever (3) is transmission-connected to the cantilever drive mechanism (2); The steering mechanism (4) comprises a steering drive source (41), the body of the steering drive source (41) being fixedly mounted on the free end of the cantilever (3), and the power output end of the steering drive source (41) being transmission-connected to the body of the milling cutter drive source (51).

3. The milling device according to claim 2, characterized in that: The milling actuator (5) further comprises a milling cutter mounting seat (53), the milling cutter mounting seat (53) being transmission-connected to the power output end of the steering drive source (41), and the body of the milling cutter drive source (51) being fixedly mounted on the milling cutter mounting seat (53); The steering mechanism (4) further comprises a first bearing (42) connected between the cantilever (3) and the milling cutter mounting seat (53).

4. The milling device according to any one of claims 1 to 3, characterized in that: The cantilever drive mechanism (2) comprises an axial drive assembly (21) and a movable frame (22); the axial drive assembly (21) is mounted on the base (1) and is transmission-connected to the movable frame (22); the cantilever (3) is connected to the movable frame (22); the axial drive assembly (21) is configured to drive the movable frame (22) and the cantilever (3) to move simultaneously along a first direction relative to the base (1).

5. The milling device according to claim 4, characterized in that: The cantilever drive mechanism (2) further comprises a slewing drive assembly (23), wherein the slewing drive assembly (23) is mounted on the movable frame (22) and is in transmission connection with the cantilever (3); the slewing drive assembly (23) is configured to drive the cantilever (3) to slew relative to the movable frame (22), and the slewing centerline of the cantilever (3) is parallel to the first direction.

6. The milling device according to claim 5, characterized in that: The rotary drive assembly (23) comprises a rotary drive source (231), a driving gear (232) and a driven gear (233), wherein: The body of the rotary drive source (231) is fixedly mounted on the movable frame (22); The driving gear (232) is drivingly connected to the power output end of the rotary driving source (231) and meshes with the driven gear (233); The driven gear (233) is rotatably mounted on the moving frame (22) and is connected to the cantilever (3).

7. The milling device according to claim 5, characterized in that: The cantilever drive mechanism (2) further comprises a cross slide assembly (24), wherein the cross slide assembly (24) is connected between the rotary drive assembly (23) and the cantilever (3); the cross slide assembly (24) is configured to drive the cantilever (3) to move in any direction within a preset plane relative to the rotary drive assembly (23), wherein the preset plane is perpendicular to the rotary centerline of the cantilever (3).

8. The milling device according to claim 7, characterized in that: The cross slide assembly (24) comprises a first slide (241) and a second slide (242), wherein the first slide (241) is transmission-connected to the rotary drive assembly (23), the second slide (242) is slidably mounted on the first slide (241) along a second direction, and the cantilever (3) is slidably mounted on the second slide (242) along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

9. The hole milling device according to claim 8, characterized in that: A first driving structure is provided on the first slide (241), the first driving structure comprising a first driving source (243), a first lead screw (244) and a first nut (245); the body of the first driving source (243) is fixedly mounted on the first slide (241); the first lead screw (244) is rotatably mounted on the first slide (241) and is transmission-connected to a power output end of the first driving source (243); the first nut (245) is screwed to the first lead screw (244) and is fixedly connected to the second slide (242); And / or, a second drive structure is provided on the second slide (242), the second drive structure comprises a second drive source, a second lead screw and a second nut, the body of the second drive source is fixedly mounted on the second slide, the second lead screw is rotatably mounted on the second slide and is transmission-connected to the power output end of the second drive source, and the second nut is threadedly connected to the second lead screw and is fixedly connected to the cantilever (3).

10. The hole milling device according to claim 8, characterized in that: A guide assembly (25) is provided between the base (1) and the movable frame (22) and / or between the first slide (241) and the second slide (242) and / or between the second slide (242) and the cantilever (3).

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