Self-adaptive curved surface support device for mirror swing type milling head

Abstract

To provide a self-adaptable curved surface support device for a mirror swing type milling head. [Solution] This self-adaptable curved surface support device for a mirror swing type milling head comprises a fixed frame 1, a housing 2, a direction changing mechanism 3, a floating support mechanism 4, and a spring 5. The fixed frame has a housing attached to one end, and the housing has a direction changing mechanism and the floating support mechanism 4 attached to one end. The floating support mechanism is connected to the direction changing mechanism, which is used to swing the floating support mechanism in a circumferential direction. A number of springs are provided within the housing, which connect the fixed frame and the floating support mechanism.

Description

[Technical field]

[0001] The present invention relates to the technical field of parts machining, and in particular to a self-adaptive curved surface support device for a mirror swing type milling head. [Background technology]

[0002] Milling of large aviation thin-walled parts is one of the key technologies in aircraft airframe manufacturing and has always been a difficult problem that troubles manufacturing engineers. Aircraft skin panels are typical aviation thin-walled parts, important parts of aircraft, and exterior parts of aircraft. The stress conditions of aircraft skin panels are complex, and the use environment is complex and harsh, so the processing requirements of aircraft skin panels are very difficult. The traditional chemical polishing method of aircraft skin panels has many processes, high pollution, and low accuracy. Mirror milling, a new green processing method that has emerged in recent years, is a processing method that integrates milling, edge cutting, and drilling by hanging and clamping the aircraft skin panel and setting up a processing axis and a support axis that move synchronously on both sides. It can effectively improve the processing efficiency and is the development trend of aircraft skin panel processing in the future. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Prior Art Document CN218855718U Prior art document CN218855718U discloses a support end of a mirror milling machine, which is connected to the front end of the support rod of the mirror milling machine and is used to support the workpiece to be machined. The support end body is a structure called a flat end cover. The rear end of the flat end cover has a connection end with the mirror milling machine, and the center of the front end of the flat end cover has a circular sinking platform. The center of the sinking platform has a central water outlet that passes through the entire flat end cover, and the other end of the water outlet is connected to the water supply pipe of the mirror milling machine. There are a number of sinking grooves around the front sinking platform of the flat end cover, which are used to mount eddy current sensors. A flat rubber pad is fixed in the front sinking platform of the flat end cover, and a gap water tank is installed between the flat rubber pads, and the gap water tank is connected to the water outlet.

[0004] However, users of mirror-type milling machines for aircraft skin panels generally require that the machining error in the thickness of the aircraft skin panel be within ±0.1 mm. With this conventional technology, the supported end does not float, and the upper end of the supported end is supported in a direction other than the normal line, making it difficult to keep the machining thickness error, which is a characteristic of aircraft skin panel milling, within ±0.1 mm. Summary of the Invention

[0005] SUMMARY OF THE PRESENT EMBODIMENT The objective of the present invention is to provide a self-adaptable curved surface support device for a mirror swing type milling head, which solves the above technical problems. [Problem to be solved by the invention]

[0006] The technical solutions adopted in the present invention are as follows:

[0007] The self-adaptable curved surface support device for a mirror swing type milling head includes a fixed frame, a housing, a direction change mechanism, a floating support mechanism, and a spring, the fixed frame has a housing attached to one end, the direction change mechanism and the floating support mechanism attached to one end of the housing. The floating support mechanism is connected to the direction change mechanism, and the direction change mechanism is used to swing the floating support mechanism in a circumferential direction. A number of springs are provided in the housing, and the springs connect the fixed frame and the floating support mechanism.

[0008] Preferably, the swing sleeve is included. The swing sleeve is installed in the housing, one end of the swing sleeve is connected to the fixed frame, and the other end is connected to the direction changing mechanism.

[0009] More preferably, a displacement sensor is also provided, the displacement sensor being provided on the outer wall of the swing sleeve.

[0010] More preferably, a silicon cover is also included, with one end of the silicon cover being attached to the housing and the other end being connected to the floating support mechanism.

[0011] More preferably, the floating support mechanism includes a pad and a sliding member, the pad is mounted in a silicon cover, the other end of the silicon cover is connected to the pad, and the pad is mounted on the outside of the sliding member like a sleeve joint.

[0012] More preferably, the floating support mechanism includes an upper support end cover and a first pressing cover, the upper support end cover being provided at one end of the sliding member, and the first pressing cover being provided around the sliding member. The first pressing cover is connected to the pad.

[0013] More preferably, the direction changing mechanism includes a bearing base, an inner bearing ring, a retainer, and steel balls, the bearing base is fixedly connected to the swing sleeve around the sliding member, has a retainer therein, a plurality of steel balls are provided in the retainer, an inner bearing ring is provided on the pad side of the bearing base and is connected to the pad, the inner bearing ring is in contact with the plurality of steel balls, one end of each of the plurality of springs is connected to the inner bearing ring, and the other end of each of the springs is connected to the fixed frame.

[0014] More preferably, an inclined guide surface is provided on the steel ball side of the inner ring of the bearing, and this guide surface comes into contact with the steel ball.

[0015] More preferably, the pad is provided with an air hole which communicates with the inside of the sliding member and is used to supply compressed air to the inside of the sliding member.

[0016] More preferably, a first through hole step is provided at one end of the swing sleeve and a second through hole step is provided at the fixed frame, the first through hole step being flush with the second through hole step.

[0017] The above technical solutions have the following advantages or beneficial effects: (1) In the present invention, the direction changing mechanism can be set to cause the floating support mechanism to oscillate in the circumferential direction, thereby avoiding the problem of the floating support mechanism supporting the workpiece in a direction other than the normal line during machining. (2) In the present invention, the spring setting allows the floating support mechanism to be automatically reset, and the floating support mechanism can return to its original position after swinging. (3) In the present invention, by providing a floating support mechanism, vibration of the curved thin wall during machining can be avoided. (4) In the present invention, by providing a silicone cover, the floating support mechanism is not restricted in its circumferential swing motion, and the waterproof and dustproof properties of the floating support mechanism can be ensured during the swing motion. [Brief description of the drawings]

[0018] [Figure 1]FIG. 1 is a schematic diagram of a self-adaptable curved surface support device for a mirror swing type milling head of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of the rear structure of the self-adaptable curved surface support device for the mirror swing type milling head of the present invention. [Diagram 3] FIG. 3 is a cross-sectional schematic diagram of a self-adaptable curved surface support device for a mirror swing type milling head according to the present invention. [Figure 4] FIG. 4 is an exploded view showing the internal configuration of the direction changing mechanism of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The technical solutions of the present invention are clearly and completely described below with reference to the accompanying drawings, but obviously, the described embodiments are only a part, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0020] In describing the present invention, it should be noted that when the terms "middle", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" are used, the orientation and positional relationship are based on the orientation and positional relationship shown in the drawings, and are merely for convenience and simplification of the description of the present invention, and are not to be construed as limiting the present invention, implying that the devices or elements referred to must have a specific orientation or operate with a structure related to a specific orientation. Furthermore, when the terms "first", "second" and "third" are used, they are for descriptive purposes only, and should not be construed as indicating or implying a relative importance.

[0021] In the description of the present invention, unless otherwise specified and limited, the terms "installed", "coupled" and "connected" should be understood in a broad sense. For example, a connection may be a fixed connection, a removable connection, or an integral connection, a mechanical connection, or an electrical connection, a connection through an intermediate medium, or an internal connection between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention on a case-by-case basis.

[0022] Fig. 1 is a schematic diagram of a self-adaptable curved surface support device for a mirror swing type milling head of the present invention. Fig. 2 is a schematic diagram of the back of a self-adaptable curved surface support device for a mirror swing type milling head of the present invention. Fig. 3 is a schematic cross-sectional view of a self-adaptable curved surface support device for a mirror swing type milling head of the present invention. Fig. 4 is an exploded schematic diagram of a self-adaptable curved surface support device for a mirror swing type milling head.

[0023] A diagram of a universal mechanism in the present invention. Referring to Figs. 1-4 showing a preferred embodiment, the self-adaptable curved surface support device for the illustrated mirror swing type milling head includes a fixed frame 1, a housing 2, a direction change mechanism 3, a floating support mechanism 4 and a spring 5. The housing 2 is attached to one end of the fixed frame 1, the direction change mechanism 3 and the floating support mechanism 4 are provided at one end of the housing 2, the floating support mechanism 4 is connected to the direction change mechanism 3, the universal mechanism 3 is used for the floating support mechanism 4 to swing in the circumferential direction, and a plurality of springs 5 ​​are provided in the housing 2, and the springs 5 ​​connect the fixed frame 1 and the floating support mechanism 4. In this embodiment, the housing 2 and the fixed frame 1 are connected via a bolt, and a seal ring is provided to ensure a sealing effect and waterproof and dustproof properties. Among them, the fixed frame 1 is used for screw connection to the W axis at the rear end of the external swing head, and the screw connection between the two may be applied with a screw loosening prevention adhesive to tighten the screw to prevent loosening. According to FIG. 3, a convex structure is provided at the other end of the fixed frame 1, and a male screw is provided on the outer wall of this convex structure for screw connection with the W axis at the rear end of the swing head. The frame 1 may slide with the box hole wall of the swing head while moving in accordance with the movement of the W axis. A seal ring is used between the fixed frame 1 and the box hole wall for a sealing effect, and water vapor and dust can pass through the sliding gap during sliding and prevent them from entering the swing head box. Electronic components such as the W axis motor are built into the swing head box.

[0024] In this embodiment, a direction changing mechanism 3 is provided at one end of the housing 2 and cooperates with a silicon cover 6. The direction changing mechanism 3 facilitates the circumferential swing of the floating support mechanism 4, and also solves the problem of the floating support mechanism 4 facing in a non-normal direction during curved surface milling. A number of springs 5 ​​are arranged in a ring shape and connected to the floating support mechanism 4, which can pull the floating support mechanism 4 so that the floating support mechanism 4 can return to its original position after swinging.

[0025] The floating support mechanism 4 is extendable and contractible in the axial direction, and can suppress vibration of the thin material during processing.

[0026] In addition, in a preferred embodiment, a swing sleeve 7 is also provided, one end of which is connected to the fixed frame 1, and the other end of which is connected to the direction change mechanism 3. As shown in FIG. 3, the inside of the swing sleeve 7 is hollow, allowing the detection probe and its fixed parts to swing within the hollow, and a first through-hole step is provided on the outer wall of one end of the swing sleeve 7, one end of the fixed frame 1 has a positioning hole, and a second through-hole step is provided around the opening of the positioning hole, and the first through-hole step is perfectly aligned with the second through-hole step, which is used for positioning the swing sleeve 7. Next, the swing sleeve 7 is screwed to the fixed frame 1. In this way, the accuracy and firmness of the installation can be ensured. A fixing protrusion is also provided inside the positioning hole, and this fixing protrusion presses the swing sleeve 7, so that the first through-hole step of the swing sleeve 7 and the second through-hole step of the fixed frame 1 are in close contact with each other.

[0027] In this embodiment, as shown in FIG. 2, openings for passing air pipes, water pipes, electric wiring, etc. are provided at corresponding positions on the fixed frame 1.

[0028] As shown in FIG. 3, a plurality of springs 5 ​​are arranged in an annular shape around the swing sleeve 7 .

[0029] Furthermore, as a preferred embodiment, a displacement sensor is also provided, and a displacement sensor is provided on the outer wall of the oscillating sleeve 7. The provided displacement sensor can be connected to an external controller, and the oscillating displacement of the pad 401 can be monitored via the external controller, and the oscillating angle of the floating support mechanism 4 can be calculated.

[0030] Furthermore, as a preferred embodiment, a silicon cover 6 is also provided, one end of which is attached to the housing 2 and the other end of which is connected to the floating support mechanism 4. In this embodiment, as shown in Fig. 3, a groove is provided in the outer wall of one end of the housing 2. The silicon cover 6 is clamped into the groove that fixes the housing 2 by a clamping force generated by deformation of the silicon cover 6 itself, thereby achieving dustproofing and sealing functions.

[0031] Furthermore, as a preferred embodiment, the floating support mechanism 4 includes a pad 401 and a sliding member. The other end of the silicon cover 6 is connected to the pad 401, and the outside of the sliding member is connected to the pad 401 like a sleeve joint. The floating support mechanism 4 also includes a second pressing cover 404. As shown in FIG. 3, the second pressing cover 404 is used to press the other end of the silicon cover 6, and the second pressing cover 404 is screw-connected to the pad 401. In this way, the other end of the silicon cover 6 is connected to the pad 401, and the silicon cover 6 can be deformed to follow the oscillation of the pad 401.

[0032] Further, in a preferred embodiment, the floating support mechanism 4 includes an upper support end cover 402 and a first pressing cover 403. The upper support end cover 402 is provided at one end of the sliding member, and the first pressing cover 403 is provided around the sliding member. The first pressing cover 403 is connected to the pad 401 around the sliding member 403. As shown in FIG. 3, the sliding member includes a fixed sleeve 405 and a sliding sleeve 406 located at the outer edge of one end of the fixed sleeve 405. A seal ring is provided between the sliding sleeve 406 and the fixed sleeve 405, and the upper support end cover 402 is connected and fixed to the sliding sleeve 406, and the upper support end cover 402 partially extends into the fixed sleeve 40, and the upper support end cover 402 is also sealed between the fixed sleeve 405 and the fixed sleeve 405 by a seal ring. The outer wall of the sliding sleeve 406 is provided with a position limiting groove, and after the first holding cover 403 and the pad 401 are screwed together, the inner wall of the first holding cover 403 partially extends into the position limiting groove, which can prevent the sliding sleeve 406 from being separated from the fixed sleeve 405. Here, the pad 401 is provided with an air hole, which communicates with the inside of the sliding part and is used to supply compressed air to the inside of the sliding part. Specifically, the air hole of the pad 401 is connected to the inside of the fixed sleeve 405 to form an air pressure chamber, and the air hole of the pad 401 is connected to an external air pump to send compressed air into the air pressure chamber. Thus, when the upper support end cover 402 is pressed, the sliding sleeve 406 slides in conjunction with it. The supporting force of the upper support end cover 402 can be controlled by providing different air pressures.

[0033] During the processing of the thin-walled member, the force supporting the thin-walled member changes, and the upper supporting end cover 402 approaches the fixed sleeve 405, but the compressed air provides thrust, so the position of the sliding sleeve 406 changes self-adaptively. At the same time, the pad 401 can oscillate to provide thrust, and can oscillate self-adaptively according to the change of the processing direction.

[0034] Further, as a preferred embodiment, the direction changing mechanism 3 includes a bearing base 301, a bearing inner ring 302, a retainer 303, and a steel ball 304. The bearing base 301 is located on the outer periphery of the swing sleeve 7 and is fixedly connected to it. The base 301 is provided with a retainer 303, and a number of steel balls are installed in the retainer 303. The bearing base 301 is provided with a bearing inner ring 302 on a surface facing the pad 401. The bearing inner ring 302 is connected to the pad 401 and is in contact with a number of steel balls 304. One end of the multiple springs 5 ​​is connected to the bearing inner ring 302, and the other end of the springs 5 ​​is connected to the fixed frame 1. The bearing inner ring 302 is provided with an inclined guide surface on the steel ball 304 side, and this guide surface is in contact with the steel ball 304. As shown in FIG. 3, the bearing base 301 is screwed to the other end of the swing sleeve 7, and the swing sleeve 7 does not change angle, does not swing, and can only move along the W axis. The steel ball 304 is disposed with its center determined by the cage 303 so as to be able to roll within the cage 303. The bearing inner ring 302 and the pad 401 are connected and fixed by screws.

[0035] When the upper support end cover 402 swings, the pad 401 swings in response to the swing, and since the guide surface is in contact with the steel ball 304, the pad 401 also drives the swing of the bearing inner ring 302. Here, both ends of the spring 5 are connected to the fixed frame 1 and the pad 401 by screws, respectively, and the spring 5 may be a tension spring, thus tightening the pad 401, which in turn drives the bearing inner ring 302 to tightly press the steel ball 304, thereby ensuring that the bearing base 301, the bearing inner ring 302, the cage 303, and the steel ball 304 will not come apart.

[0036] When the pad 401 swings, the spring 5 applies a repulsive force to the pad 401. No matter what angle the pad 401 swings to, there is always a spring 5 that can apply a pulling force to the pad 401, so the pad 401 can return to its initial position after swinging.

[0037] 3, a first positioning hole for fitting with bearing base 301 is provided at the other end of oscillating sleeve 7. To ensure centering and installation accuracy, the inner wall of the first positioning hole is in close contact with the outer wall of bearing base 301. To ensure centering and installation accuracy, a second positioning hole for fitting with inner bearing ring 302 is provided in pad 401, and the inner wall of the second positioning hole is in close contact with the outer wall of inner bearing ring 302.

[0038] The above is only the preferred embodiment of the present invention, and does not limit the implementation and protection scope of the present invention. Those skilled in the art can use the description and diagrams of the solutions of the present invention to realize the schemes and designs realized by equivalent replacements and obviously minor modifications shall be included in the protection scope of the present invention. The invention as described in the claims of the original application is set forth below. [1] A self-adaptable curved surface support device for a mirror swing type milling head includes a fixed frame (1), a housing (2), a direction changing mechanism (3), a floating support mechanism (4), and a spring (5), The housing (2) provided at one end of the fixed frame (1); The direction changing mechanism (3) and the floating support mechanism (4) provided at one end of the housing (2); a direction changing mechanism (3) connected to the floating support mechanism (4) and used to swing the floating support mechanism (4) in a circumferential direction; A plurality of springs (5) are provided in the housing (2) and connect the fixed frame (1) and the floating support mechanism (4); A self-adaptable curved surface support device for a mirror swing type milling head, comprising: [2] In the self-adaptable curved surface support device for the mirror swing type milling head described in [1], A swing sleeve (7), The oscillating sleeve (7) installed in the housing is connected at one end to the fixed frame (1) and at the other end to the direction changing mechanism (3). A self-adaptable curved surface support device for a mirror swing type milling head. [3] [2] A self-adaptable curved surface support device for a mirror swing type milling head, A displacement sensor. The displacement sensor is attached to the outer wall of the swing sleeve (7). A self-adaptable curved surface support device for a mirror swing type milling head. [4] [2] A self-adaptable curved surface support device for a mirror swing type milling head, A silicone cover (6) is provided. One end of the silicon cover (6) is attached to the housing (2), and the other end is attached to the floating support mechanism (4). A self-adaptable curved surface support device for a mirror swing type milling head. [5] [4] A self-adaptable curved surface support device for a mirror swing type milling head, The floating support mechanism (4) includes a pad (401) and a sliding member, The pad (401) is mounted in the silicon cover (6), and the other end of the silicon cover (6) is connected to the pad (401), and the pad (401) is attached to the outside of the sliding member like a sleeve joint. A self-adaptable curved surface support device for a mirror swing type milling head. [6] [5] A self-adaptable curved surface support device for a mirror swing type milling head, The floating support mechanism (4) further includes an upper support end cover (402) and a first pressing cover (403), The upper support end cover (402) is provided at one end of the sliding member, and a first pressing cover (403) is provided around the sliding member, and the first pressing cover (403) is connected to the pad (401); A self-adaptable curved surface support device for a mirror swing type milling head. [7] [5] A self-adaptable curved surface support device for a mirror swing type milling head, The direction changing mechanism (3) includes a bearing base (301), a bearing inner ring (302), a cage (303), and steel balls (304). The bearing base (301) and the rocking sleeve (7) are fixedly connected to the periphery of the sliding member, a plurality of steel balls (304) are placed in a retainer (303) mounted in the bearing base (301), and a bearing inner ring (302) connected to the pad (401) is mounted on the surface of the bearing base (301) facing the pad (401), and the bearing inner ring (302) is in contact with the plurality of steel balls (304), One end of the spring is connected to the bearing inner ring (302), and the other end is connected to the fixed frame (1); A self-adaptable curved surface support device for a mirror swing type milling head. [8] [7] A self-adaptable curved surface support device for a mirror swing type milling head, The bearing inner ring (302) is provided with an inclined guide surface on the side of the steel ball (304) in contact with the steel ball (304); A self-adaptable curved surface support device for a mirror swing type milling head. [9] [5] A self-adaptable curved surface support device for a mirror swing type milling head, The pad (401) is provided with air holes, The air hole is connected to the inside of the sliding member and is used to provide compressed air to the inside of the sliding member. A self-adaptable curved surface support device for a mirror swing type milling head.

[10] [2] A self-adaptable curved surface support device for a mirror swing type milling head, A first through-hole step is provided at one end of the swing sleeve (7), and a second through-hole step is provided at the fixed frame (1), and the first through-hole step is flush with the second through-hole step; A self-adaptable curved surface support device for a mirror swing type milling head. [Explanation of symbols]

[0039] Reference Signs List 1 fixed frame, 2 housing, 3 direction change mechanism, 301 bearing base, 302 bearing inner ring, 303 cage, 304 steel ball, 4 floating support mechanism, 401 pad, 402 upper support end cover, 403 first pressing cover, 404 second pressing cover, 405 fixed sleeve, 406 sliding sleeve, 5 spring, 6 silicone cover, 7 swinging sleeve.

Claims

1. A self-adaptable curved surface support device for a mirror swing type milling head includes a fixed frame (1), a housing (2), a direction changing mechanism (3), a floating support mechanism (4), and a spring (5), A self-adaptable curved surface support device for the mirror swing type milling head, The housing (2) provided at one end of the fixed frame (1); The direction changing mechanism (3) and the floating support mechanism (4) provided at one end of the housing (2); the direction changing mechanism (3) connected to the floating support mechanism (4) and used to swing the floating support mechanism (4) in a circumferential direction; A plurality of springs (5) are provided in the housing (2) and connect the fixed frame (1) and the floating support mechanism (4); A swing sleeve (7) installed in the housing (2); A silicone cover (6), One end of the swing sleeve (7) is connected to the fixed frame (1) and the other end is connected to the direction changing mechanism (3); One end of the silicon cover (6) is attached to the housing (2), and the other end is attached to the floating support mechanism (4), The floating support mechanism (4) is axially extendable and retractable, and supports the workpiece to be processed; The floating support mechanism (4) includes a pad (401) and a sliding member, The pad (401) is at least partially mounted in the silicon cover (6), the other end of the silicon cover (6) is connected to the pad (401), and the pad (401) is attached to the outside of the sliding member like a sleeve joint; The pad (401) is provided with air holes, A self-adaptable curved surface support device for a mirror swing type milling head, characterized in that the air hole is connected to the inside of the sliding member and is used to provide compressed air to the inside of the sliding member.

2. A self-adaptable curved surface support device for a mirror swing type milling head according to claim 1, Equipped with a displacement sensor, The displacement sensor is attached to the outer wall of the swing sleeve (7). A self-adaptable curved surface support device for a mirror swing type milling head.

3. A self-adaptable curved surface support device for a mirror swing type milling head according to claim 1, The floating support mechanism (4) further includes an upper support end cover (402) and a first pressing cover (403); The upper support end cover (402) is provided at one end of the sliding member, and a first pressing cover (403) is provided around the sliding member, and the first pressing cover (403) is connected to a pad (401); A self-adaptable curved surface support device for a mirror swing type milling head.

4. A self-adaptable curved surface support device for a mirror swing type milling head according to claim 1, The direction changing mechanism (3) includes a bearing base (301), a bearing inner ring (302), a cage (303) and steel balls (304); The bearing base (301) and the rocking sleeve (7) are fixedly connected around the sliding member, a plurality of steel balls (304) are placed in a cage (303) mounted in the bearing base (301), and a bearing inner ring (302) connected to the pad (401) is mounted on the surface of the bearing base (301) facing the pad (401), and the bearing inner ring (302) is in contact with the plurality of steel balls (304); One end of the spring is connected to the bearing inner ring (302) and the other end is connected to the fixed frame (1); A self-adaptable curved surface support device for a mirror swing type milling head.

5. A self-adaptable curved surface support device for a mirror swing type milling head according to claim 4, The bearing inner ring (302) is provided with an inclined guide surface on the side of the steel ball (304) in contact with the steel ball (304); A self-adaptable curved surface support device for a mirror swing type milling head.

6. A self-adaptable curved surface support device for a mirror swing type milling head according to claim 1, A first through-hole step is provided at one end of the swing sleeve (7), and a second through-hole step is provided at the fixed frame (1), and the first through-hole step is flush with the second through-hole step; A self-adaptable curved surface support device for a mirror swing type milling head.

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