Metal part milling device

Abstract

The invention relates to the technical field of milling, and provides a metal part milling device which comprises a rack, a rotating driving part, an inner clamping assembly, an outer clamping assembly, a clamping driving part, a milling module and a bearing support, the rotating driving part comprises a rotating shell and a transmission gear, the rotating shell is arranged in the bearing support, the transmission gear is arranged in the rotating shell, and the inner clamping assembly and the outer clamping assembly are arranged on the rack. The inner clamping assembly comprises a driven type axial moving part and a first clamping piece, the first clamping piece is arranged on the surface of the driven type axial moving part in a sliding mode, the outer clamping assembly comprises a driving type axial moving part and a second clamping piece, and the first clamping piece is arranged on the surface of the driving type axial moving part in a sliding mode. The driven type axial moving part is connected with the driving type axial moving part through a transmission gear, the driving type axial moving part and the driven type axial moving part can move in the opposite direction, and the clamping driving part is used for controlling the first clamping piece and the second clamping piece to move in the radial direction at the same time. The clamp has the characteristics that the clamp does not need to be disassembled or replaced and the clamping area is accurately adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of milling, in particular to a metal part milling processing device. Background Art

[0002] A flange is a disc-shaped metal component with multiple holes, widely used to connect pipes and fix metal parts between mechanical components. Its characteristic edge portion is usually raised to a certain height above the center plane, forming a flange used to support or connect other components. The milling process of flanges requires high precision and high surface quality to ensure the reliability of the connection. In the milling process, the flat milling of flanges usually requires machining multiple planes, so the demand for fixture design is high. The function of the fixture is to secure the workpiece and provide precise positioning, enabling rapid clamping during milling, improving efficiency, and reducing machining errors caused by workpiece displacement or deformation.

[0003] After searching, the announcement number CN116237568B discloses a flange slot hole external cutting device, including a fixed component and a drive shaft seat fixedly connected to the inner wall of the flange; through the coaxial transmission of the swing arms in the two fixed components, multiple swing arms of the same size can produce the same stroke under the effect of synchronous transmission. When the multiple swing arms contact the inner wall of the flange and are tightened, it can be ensured that the linkage shaft used for transmission coincides with the center axis of the flange. When the linkage shaft coincides with the center axis of the flange, by setting the output end of the driving motor of the driving milling cutter to be coaxial with the linkage shaft, it can be ensured that the moving trajectory of the milling cutter can be parallel to the sealing surface of the flange, avoiding the situation that after the internal expansion flange end face milling machine is fixed with the flange, the output end of the driving motor of the driving milling cutter does not coincide with the center axis of the flange, resulting in inconsistent milling depth of the flange sealing surface during the movement of the milling cutter, thereby causing damage to the flange sealing surface.

[0004] Conventional milling equipment for metal parts also has the following defects: (1) Conventional milling fixtures can usually only be fixed in one of the positions of inner hole clamping or outer circle clamping. When machining inner surfaces, the inner clamping mechanism will block the tool path, and when machining outer surfaces, the outer clamping mechanism will block the tool path, often requiring the fixture to be replaced or re-clamped; (2) Conventional fixtures (such as three-jaw chucks) usually have a fixed clamping area, or a limited and imprecise adjustment range. When faced with precision machining that requires local milling (especially near the clamping area) or requires reducing the dispersion of the clamping force, the clamping area (contact point range) cannot be accurately adjusted according to the size and position of the actual milling area. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal parts milling processing device, which solves the technical problems encountered in the milling processing of metal parts such as flanges (especially the inner and outer surfaces and local areas), such as fixture interference, insufficient rigidity, low clamping efficiency and poor adaptability, by automatically switching and hiding the inner and outer clamping positions and accurately controlling the contact area.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a metal part milling processing device, comprising a frame, a milling module and a supporting bracket, wherein the milling module and the supporting bracket are both arranged in the frame, and further comprising: A rotation drive unit, comprising a rotation shell and a transmission gear, wherein the rotation shell is disposed in the supporting bracket, and the transmission gear is disposed in the rotation shell; An inner clamping assembly, the inner clamping assembly comprising a driven axial moving portion and a first clamping member, the first clamping member being slidably disposed on a surface of the driven axial moving portion; An outer clamping assembly, the outer clamping assembly comprising an active axially movable portion and a second clamping member, the first clamping member being slidably disposed on a surface of the active axially movable portion, the driven axially movable portion being connected to the active axially movable portion via a transmission gear, the active axially movable portion being capable of moving in opposite directions to the driven axially movable portion; The clamping drive portion is arranged in the rotating shell, and is used to simultaneously control the first clamping member and the second clamping member to perform radial movement.

[0007] As a further solution of the present invention, the first clamping member and the second clamping member have the same component composition, both consisting of a hollow pin body, a clamping rod and a limit ring. The clamping rod passes through the hollow pin body, and the limit ring is fixedly provided on the surface of the hollow pin body and the clamping rod.

[0008] As a further solution of the present invention, the clamping drive part includes a first driving worm, a first worm disc and an arc-shaped guide rail. The first worm disc and the first driving worm are both connected in the rotating shell. The first driving worm is connected to the first worm disc for transmission. The surface of the first worm disc is provided with an arc-shaped guide rail. The hollow pin bodies in the first clamping member and the second clamping member are both movably connected in the arc-shaped guide rail.

[0009] As a further solution of the present invention, the driven axial moving part includes a first carrier, a first radial guide rail and a rack 1, the rack 1 is fixedly arranged on the surface of the first carrier, the first carrier surface is provided with a first radial guide rail, and the clamping rod in the first clamping member is movably connected in the first radial guide rail.

[0010] As a further solution of the present invention, the active axial moving part includes a second carrier, a second radial guide rail, a second rack, an electric telescopic rod and an end cover, the second rack is fixedly connected between the second carrier and the end cover, the fixed end of the electric telescopic rod is fixedly arranged in the rotating shell, the end cover is fixedly connected to the movable end of the electric telescopic rod, the surface of the second carrier is provided with a second radial guide rail, and the clamping rod in the second clamping member is movably connected to the second radial guide rail.

[0011] As a further solution of the present invention, the first carrier and the second carrier are concentrically arranged, the angle between the first radial guide rail and the second radial guide rail with respect to the center of the second carrier is 40°, the angle between the three groups of the first radial guide rails or the second radial guide rails with respect to the center of the second carrier is 120°, and the distance between the first radial guide rail and the center of the second carrier is less than the distance between the second radial guide rail and the center of the second carrier.

[0012] As a further solution of the present invention, the rotary drive unit also includes a second drive worm and a second worm disc, the second worm disc is fixedly provided on the surface of the rotating shell, the second drive worm gear is connected to the surface of the supporting bracket, the second drive worm gear is connected to the second worm disc, and the rack 1 and rack 2 both pass through the surface of the second worm disc.

[0013] Beneficial effects of the present invention: This application not only can realize the automatic switching and hiding of the inner and outer clamping positions through the coordinated reverse axial movement of the active axial moving part and the driven axial moving part, but also can finely adjust the position and range of the clamping support point, and has the characteristics of no need to disassemble or replace the fixture and precise adjustment of the clamping area, which solves the problems of fixture interference, low clamping efficiency and poor adaptability of traditional milling fixtures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view of the present invention.

[0015] Figure 2 It is an exploded view of the present invention.

[0016] Figure 3 2 is a three-dimensional diagram of a clamping assembly according to an embodiment of the present invention.

[0017] Figure 4 3D diagram of a clamping assembly according to an embodiment of the present invention.

[0018] Figure 5 It is a cross-sectional view of the present invention.

[0019] Figure 6 It is a schematic diagram of the present invention for clamping a flange.

[0020] Figure 7 It is a plan view of the present invention.

[0021] Reference numerals: 1-bearing bracket, 11-limiting clip; 2-clamping drive part, 21-first driving worm, 22-first worm disc, 23-arc guide rail; 3-inner clamping assembly, 31-driven axial moving part, 311-first carrier, 312-first radial guide rail, 313-rack 1, 32-first clamping member, 321-hollow pin body, 322-clamping rod, 323-limiting ring; 4-external clamping assembly, 41-active axial moving part, 411-second carrier, 412-second radial guide rail, 413-second rack, 414-electric telescopic rod, 415-end cover, 42-second clamping member; 5-rotation driving part, 51-second driving worm, 52-rotation housing, 53-second worm, 54-transmission gear; 6-Frame, 7-Milling module, 8-Flange. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] See also Figures 1 to 7 In one embodiment of the present invention, a metal part milling processing device includes a frame 6, a milling module 7 and a supporting bracket 1, wherein the supporting bracket 1 is provided with a limiting clamp 11, and the milling module 7 and the supporting bracket 1 are both arranged in the frame 6, and further includes: The rotary drive unit 5 includes a rotary shell 52 and a transmission gear 54. The rotary shell 52 is rotatably disposed in the limiting clamp 11, and the transmission gear 54 is disposed in the rotary shell 52. An inner clamping assembly 3, comprising a driven axially movable portion 31 and a first clamping member 32, wherein the first clamping member 32 is slidably disposed on a surface of the driven axially movable portion 31; The outer clamping assembly 4 includes an active axially movable portion 41 and a second clamping member 42. The first clamping member 32 is slidably disposed on the surface of the active axially movable portion 41. The driven axially movable portion 31 is connected to the active axially movable portion 41 via a transmission gear 54. The active axially movable portion 41 can move in the opposite direction to the driven axially movable portion 31. The clamping driving part 2 is disposed in the rotating shell 52 , and the clamping driving part 2 is used to simultaneously control the first clamping member 32 and the second clamping member 42 to move radially.

[0025] See also Figures 3 to 5 Furthermore, the first clamping member 32 and the second clamping member 42 have the same component composition, both consisting of a hollow pin body 321, a clamping rod 322 and a limiting ring 323. The clamping rod 322 passes through the hollow pin body 321, and the limiting ring 323 is fixedly provided on the surface of the hollow pin body 321 and the clamping rod 322.

[0026] See also Figures 3 to 5 Furthermore, the clamping drive part 2 includes a first driving worm 21, a first worm plate 22 and an arc guide rail 23, the first worm plate 22 and the first driving worm 21 are both connected in the rotating shell 52, the first driving worm 21 is transmission-connected to the first worm plate 22, and an arc guide rail 23 is provided on the surface of the first worm plate 22, and the hollow pin bodies 321 in the first clamping member 32 and the second clamping member 42 are both movably connected in the arc guide rail 23, and the first worm plate 22 driven by the first driving worm 21 can simultaneously control the first clamping member 32 and the second clamping member 42 to perform radial clamping actions along the first radial guide rail 312 and the second radial guide rail 412 by using the arc guide rail 23 and the hollow pin body 321. Since the first clamping member 32 and the second clamping member 42 are distributed in different positions in the arc guide rail 23, the first clamping member 32 and the second clamping member 42 can clamp from the inner and outer sides of the flange 8 respectively.

[0027] See also Figures 3 to 5 Furthermore, the driven axial moving part 31 includes a first carrier 311, a first radial guide rail 312 and a rack 313. The rack 313 is fixedly arranged on the surface of the first carrier 311. The surface of the first carrier 311 is provided with a first radial guide rail 312. The clamping rod 322 in the first clamping member 32 is movably connected to the first radial guide rail 312.

[0028] See also Figures 3 to 5Furthermore, the active axial movement portion 41 includes a second carrier 411, a second radial guide rail 412, a second rack 413, an electric telescopic rod 414, and an end cap 415. The second rack 413 is fixedly connected between the second carrier 411 and the end cap 415. The fixed end of the electric telescopic rod 414 is fixedly disposed within the rotating housing 52, and the end cap 415 is fixedly connected to the movable end of the electric telescopic rod 414. The surface of the second carrier 411 is provided with a second radial guide rail 412. The clamping rod 322 in the second clamping member 42 is movably connected to the second radial guide rail 412. The axial position is controlled by the electric telescopic rod 414, and the inner and outer clamping assemblies 4 move in opposite directions via the rack and pinion. When machining the outer surface, the outer clamping member retracts and hides, while the inner clamping member extends to clamp the inner hole, thus ensuring an unobstructed outer surface. Conversely, when machining the inner surface, the inner clamping member retracts and the outer clamping member extends to clamp the outer edge. This eliminates the need for re-clamping, saving time and reducing repeated positioning errors.

[0029] See also Figures 3 to 5 Furthermore, the first carrier 311 and the second carrier 411 are concentrically arranged, the first radial guide rail 312 and the second radial guide rail 412 form an angle of 40° with respect to the center of the second carrier 411, and the three sets of the first radial guide rail 312 or the second radial guide rail 412 form an angle of 120° with respect to the center of the second carrier 411. The distance between the first radial guide rail 312 and the center of the second carrier 411 is less than the distance between the second radial guide rail 412 and the center of the second carrier 411. A displacement sensor is integrated on the surface of the first carrier 311 or the second carrier 411 for real-time monitoring and control of the movement distance of the clamping rod 322. By precisely controlling the stroke of the electric telescopic rod 414, the movement distance of the inner and outer clamps can be adjusted, thereby changing the contact area with the workpiece. For example, during local milling, only a small area of ​​clamping is required to avoid interference, and the clamps can be partially extended. When clamping a large area, it is fully extended to enhance stability. The clamping area of ​​traditional clamps is usually fixed and difficult to adapt to different processing requirements. Combined with axial displacement (controlling the axial range of the clamping point) and radial displacement (controlling the top position / clamping force of the clamping rod 322), the actual contact area between the inner and outer clamps and the flange 8 (the area formed by the contact point) can be dynamically and accurately controlled. For small-scale local milling, the clamping point can be precisely moved to a position away from the processing area, or the axial length of the clamping rod 322 can be reduced to reduce the contact area, avoid interference or provide sufficient avoidance space; for processing that requires large-area stable support, the clamping rod 322 can be allowed to contact the workpiece within a larger axial range to increase the contact area and improve rigidity.

[0030] In addition, it can also clamp internally and externally simultaneously (the contact area between the two sets of clamping rods 322 and the workpiece surface is consistent), which is very beneficial for processing the "middle" area of ​​the flange 8 (such as the end face, transition area) or situations requiring extremely high rigidity (such as large cutting volume, thin-walled parts). This multi-position joint clamping significantly improves the rigidity and stability of the workpiece during the processing process and reduces vibration and deformation.

[0031] See also Figures 1 to 5 Furthermore, the rotation drive unit 5 also includes a second driving worm 51 and a second worm 53. The second worm 53 is fixedly provided on the surface of the rotating shell 52. The second driving worm 51 is connected to the surface of the supporting bracket 1. The second driving worm 51 is transmission-connected to the second worm 53. The rack 1 313 and the rack 2 413 both pass through the surface of the second worm 53. The rotating shell 52 controlled by the second worm 53 can control the rotation of the first clamping member 32, the second clamping member 42 and the flange 8, thereby realizing independent rotation drive in the clamping state of the workpiece. During the milling process, the workpiece can be rotated to different angles at any time as needed.

[0032] In this embodiment of the present invention, when machining an outer surface, the electrically operated telescopic rod 414 pushes the outer clamping assembly 4 (second clamping member 42) axially backward (away from the flange 8), while simultaneously driving the inner clamping assembly 3 (first clamping member 32) axially forward (approaching or contacting the inner hole of the flange 8) to perform clamping. The retracted outer clamping assembly 4 (clamping rod 322) is concealed within the rotating housing 52, leaving space for machining the outer surface.

[0033] When machining the inner surface, the electrically operated telescopic rod 414 pulls the outer clamping assembly 4 axially forward (approaching the outer diameter of the flange 8 for clamping), while simultaneously driving the inner clamping assembly 3 axially backward (away from the inner hole of the flange 8). The retreating inner clamping assembly 3 (clamping rod 322) is concealed within the rotating housing 52, leaving space for machining the inner surface.

[0034] Working principle: 1. Large-scale milling of the inner and outer surfaces of the flange 8: When the milling module 7 is needed to mill the outer surface of the flange 8, the electric telescopic rod 414 is used to control the second carrier 411 and the clamping rod 322 in the second clamping member 42 to move in the direction away from the flange 8, and the synchronously moving rack 2 413 drives the first carrier 311 and the clamping rod 322 in the first clamping member 32 to move in the opposite direction through the transmission gear 54 and the rack 1 313. Similarly, when the milling module 7 is needed to mill the outer and inner surfaces of the flange 8, under the premise of keeping the radial positions of the first clamping member 32 and the second clamping member 42 unchanged, the control can be automatically performed. The axial position of the first clamping member 32 and the second clamping member 42 is used to hide the clamping rod 322 in the first clamping member 32 or the second clamping member 42 inside the rotating shell 52, so as to realize the function of hiding the clamping rod 322 of the second clamping member 42 for outer surface milling and hiding the clamping rod 322 in the first clamping member 32 for inner surface milling, which solves the problem that the traditional milling fixture cannot adjust the clamping position according to the position of the milling surface. The whole process does not require disassembly or replacement of the fixture, and the alternating "on-duty" and "hiding" of the inner and outer clamping components 4 are realized through the axial linkage mechanism, which completely solves the problem of interference of the clamping position with the tool path and realizes the rapid conversion of inner and outer surface milling.

[0035] 2. The local milling situation of the inner and outer surfaces of the flange 8 is illustrated by using the milling module 7 to mill the outer surface of the flange 8. When the clamping rod 322 in the first clamping member 32 clamps it from the inside, the present application can also control the moving distance of the first clamping member 32 and the second clamping member 42 by controlling the distance of the second carrier 411 and the first carrier 311 through the electric telescopic rod 414, thereby controlling the first clamping member 32 and the second clamping member 42 to clamp the flange 8 from both the inside and the outside at the same time. Specifically, the contact area between the first clamping member 32 and the second clamping member 42 and the flange 8 can be precisely controlled according to the position of the milling point or the size of the milling surface, which solves the problem that the traditional milling fixture cannot adjust the clamping area according to the size of the milling surface.

[0036] To sum up, the present application can realize the automatic switching and hiding of the inner and outer clamping positions through the coordinated reverse axial movement of the active axial moving part 41 and the driven axial moving part 31, and can also finely adjust the position and range of the clamping support point. It has the characteristics of no need to disassemble or replace the clamp and accurately adjust the clamping area, which solves the problems of clamp interference, low clamping efficiency and poor adaptability of traditional milling clamps.

[0037] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A metal parts milling processing device, comprising a frame (6), a milling module (7) and a supporting bracket (1), wherein the milling module (7) and the supporting bracket (1) are both arranged in the frame (6), characterized in that: Also includes: A rotation drive unit (5), the rotation drive unit (5) comprising a rotation shell (52) and a transmission gear (54), the rotation shell (52) being disposed in the supporting bracket (1), and the transmission gear (54) being disposed in the rotation shell (52); An inner clamping assembly (3), the inner clamping assembly (3) comprising a driven axial moving portion (31) and a first clamping member (32), the first clamping member (32) being slidably disposed on a surface of the driven axial moving portion (31); An outer clamping assembly (4), the outer clamping assembly (4) comprising an active axial moving portion (41) and a second clamping member (42), the first clamping member (32) being slidably disposed on the surface of the active axial moving portion (41), the driven axial moving portion (31) being connected to the active axial moving portion (41) via a transmission gear (54), and the active axial moving portion (41) being capable of moving in the opposite direction to the driven axial moving portion (31); A clamping drive unit (2) is arranged in a rotating shell (52), and the clamping drive unit (2) is used to simultaneously control the first clamping member (32) and the second clamping member (42) to move radially.

2. A metal parts milling processing device according to claim 1, characterized in that: The first clamping member (32) and the second clamping member (42) have the same component composition, and are both composed of a hollow pin body (321), a clamping rod (322) and a limiting ring (323). The clamping rod (322) passes through the hollow pin body (321), and the limiting ring (323) is fixedly provided on the surface of the hollow pin body (321) and the clamping rod (322).

3. A metal parts milling processing device according to claim 2, characterized in that: The clamping drive portion (2) comprises a first driving worm (21), a first worm disc (22) and an arcuate guide rail (23); the first worm disc (22) and the first driving worm (21) are both connected in a rotating housing (52); the first driving worm (21) is transmission-connected to the first worm disc (22); an arcuate guide rail (23) is provided on the surface of the first worm disc (22); and hollow pin bodies (321) in the first clamping member (32) and the second clamping member (42) are both movably connected in the arcuate guide rail (23).

4. A metal parts milling processing device according to claim 3, characterized in that: The driven axial moving part (31) includes a first carrier (311), a first radial guide rail (312) and a rack (313), wherein the rack (313) is fixedly arranged on the surface of the first carrier (311), the surface of the first carrier (311) is provided with a first radial guide rail (312), and the clamping rod (322) in the first clamping member (32) is movably connected in the first radial guide rail (312).

5. A metal parts milling processing device according to claim 4, characterized in that: The active axial moving part (41) includes a second carrier (411), a second radial guide rail (412), a second rack (413), an electric telescopic rod (414) and an end cover (415); the second rack (413) is fixedly connected between the second carrier (411) and the end cover (415); the fixed end of the electric telescopic rod (414) is fixedly arranged in the rotating shell (52); the end cover (415) is fixedly connected to the movable end of the electric telescopic rod (414); a second radial guide rail (412) is provided on the surface of the second carrier (411); and a clamping rod (322) in the second clamping member (42) is movably connected to the second radial guide rail (412).

6. A metal parts milling processing device according to claim 5, characterized in that: The first carrier (311) and the second carrier (411) are concentrically arranged, the angle between the first radial guide rail (312) and the second radial guide rail (412) with respect to the center of the second carrier (411) is 40°, the angle between the three groups of the first radial guide rails (312) or the second radial guide rails (412) with respect to the center of the second carrier (411) is 120°, and the distance between the first radial guide rail (312) and the center of the second carrier (411) is smaller than the distance between the second radial guide rail (412) and the center of the second carrier (411).

7. The metal parts milling processing device according to claim 5, characterized in that: The rotary drive unit (5) further comprises a second driving worm (51) and a second worm disc (53); the second worm disc (53) is fixedly provided on the surface of the rotating shell (52); the second driving worm (51) is connected to the surface of the supporting bracket (1); the second driving worm (51) is transmission-connected to the second worm disc (53); and the rack 1 (313) and the rack 2 (413) both pass through the surface of the second worm disc (53).

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