Milling machine for metal processing

Abstract

The invention relates to the technical field of milling machining, and discloses a milling machine for metal machining, which comprises a base table, a clamping rotating mechanism and an overturning milling mechanism, the overturning milling mechanism comprises a U-shaped support arranged on the side face of the base table, the side, away from the ground, of the U-shaped support is slidably connected with a lifting sleeve, the end, away from the ground, of the lifting sleeve is rotationally connected with a main shaft, the end, close to the rotating column, of the main shaft is fixedly connected with a fixing block, and the middle of the fixing block is slidably connected with a cantilever beam perpendicular to the main shaft. The end of the cantilever beam is fixedly connected with an overturning beam perpendicular to the cantilever beam, and a milling assembly is arranged at the end, away from the cantilever beam, of the overturning beam. The milling cutter can effectively mill the whole spherical surface of the spherical shell-shaped workpiece through the rotation of the spherical shell-shaped workpiece and the revolution of the milling cutter around the spherical shell-shaped workpiece, so that the machining cost and the control cost of the milling machine are greatly reduced.

Description

Technical Field

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

[0002] In industrial production, many metal components with complex geometries, such as spherical shells (e.g., pressure vessel end caps, ball valve housings, precision instrument covers, etc.), are typically formed through casting to produce a spherical shell blank. However, the surface of the cast blank often suffers from dimensional deviations, high surface roughness, and the possibility of residual pouring and riser residue, which cannot directly meet the precision and finish requirements of the final product. Therefore, precision milling is required to remove the excess, accurately trim the spherical contour, and achieve the specified dimensional tolerance and surface quality.

[0003] However, the continuous, high-curvature spherical geometry of spherical shell workpieces presents significant challenges in milling. To achieve precise spherical contour machining, the milling cutter (especially the ball-end milling cutter used for finishing) must move along a specific spatial trajectory. This complex, multi-degree-of-freedom spatial motion requires the milling machine's kinematic mechanism to possess extremely high trajectory accuracy, dynamic response performance, and multi-axis coordinated control capabilities. Currently, the primary solution for meeting this high-precision, complex surface machining requirement is the use of high-end multi-axis CNC machining centers (such as five-axis machining centers) or machining systems equipped with high-precision industrial robots. The core motion components of such equipment (such as high-rigidity, high-precision turntables, swivel heads, precision linear guides and lead screws, or high-performance multi-jointed robotic arms) and the accompanying high-performance CNC systems are extremely expensive. Manufacturing, maintenance, and operational costs (including programming, debugging, energy consumption, and depreciation) contribute significantly to the overall machining cost. For the scenario of mass production of a specific type of spherical shell casting workpiece, the use of such general-purpose but highly complex and expensive equipment for finishing is to some extent "over-configured", resulting in a lower return on investment, so it needs to be improved. Summary of the Invention

[0004] The object of the present invention is to provide a milling machine for metal processing, so as to solve the technical problem of high manufacturing and use costs of spherical shell milling machines in the prior art.

[0005] The cam is fixedly connected to the rotating column, and the rotating ring is fixedly connected to the rotating column. A fixed plate is provided on the side of the rotating column away from the ground. The outer side of the fixed plate is rotatably connected to the flip rod sleeve. The side of the flip rod sleeve away from the fixed plate is slidably connected to the L-shaped clamping rod. A spherical shell-shaped workpiece is placed on the side of the L-shaped clamping rod away from the ground. A clamping drive component for driving the L-shaped clamping rod to move toward the flip rod sleeve is provided inside the rotating column. An angle adjustment component for adjusting the pitch angle of the flip rod sleeve is provided on the outer side of the rotating column; the flip milling mechanism comprises a U-shaped bracket provided on the side of the base, a lifting sleeve is slidably connected to the side of the U-shaped bracket away from the ground, and a main shaft is rotatably connected to one end of the lifting sleeve away from the ground. The main shaft is fixedly connected to a fixed block at one end close to the rotating column. A cantilever beam arranged perpendicular to the main shaft is slidably connected to the middle part of the fixed block. The end of the cantilever beam is fixedly connected to a flip beam arranged perpendicular to the cantilever beam. A milling component is provided at one end of the flip beam away from the cantilever.

[0006] As a preferred technical solution of the present invention, the clamping drive assembly includes a tripod mounted on the side of the rotating column close to the ground, a height-adjustable pull rod is provided in the middle of the tripod, a pull ring is provided on the outside of the pull rod that rises and falls with the pull rod, and one end of the pull rope is connected to the outside of the pull ring. The rotating column is a hollow structure, and the pull rope passes through the middle of the rotating column. A fixed head is provided on the side of the flip rod sleeve, and the fixed head is connected to the end of the pull rope away from the pull ring. A clearance hole is provided in the middle of the L-shaped clamping rod, and the pull rope passes through the clearance hole. A screw threadedly connected to the tripod is provided on the side of the pull rod close to the tripod, and a fixed ring is rotatably connected to the side of the screw close to the ground. The pull ring is sleeved on the side of the pull rod close to the ground, and a buffer spring is provided between the pull ring and the fixed ring.

[0007] As a preferred technical solution of the present invention, the number of the flip rod sleeves is greater than or equal to three, and the flip rod sleeves are symmetrically arranged relative to the axis of the rotating column. A support frame corresponding to the flip rod sleeve is provided at the end of the rotating column away from the ground, and a guide wheel cooperating with the pulling rope is provided on the support frame.

[0008] As a preferred technical solution of the present invention, the angle adjustment assembly includes a lifting collar slidably connected to the middle of the rotating column, the outer side of the lifting collar is rotatably connected to the support rod, and the end of the support rod away from the lifting collar is rotatably connected to the side of the flip rod sleeve, an anti-loosening spring is arranged between the lifting collar and the rotating ring, a threaded sleeve is arranged on the side of the rotating column away from the ground, a locking nut is threadedly connected to the outer side of the threaded sleeve, and a push rod cooperating with the lifting collar is arranged on the side of the locking nut close to the threaded sleeve.

[0009] As a preferred technical solution of the present invention, a motor bracket is provided on the side of the base, a rotating motor is provided on the motor bracket, the output shaft of the rotating motor is fixedly connected to a first bevel gear, and the first bevel gear is meshedly connected to a second bevel gear fixedly connected to the rotating column.

[0010] As a preferred technical solution of the present invention, a protruding plate is provided on the side of the U-shaped bracket, the protruding plate is fixedly connected to the threaded tube, the end of the threaded tube is threadedly connected to the lifting screw, and a first bearing seat is provided on the side of the lifting sleeve for rotation with the lifting screw.

[0011] As a preferred technical solution of the present invention, second bearing seats are provided on both sides of the cantilever beam, the middle part of the second bearing seat is rotatably connected to both sides of the transverse screw rod, and the middle part of the transverse screw rod is threadedly connected to the middle part of the fixed block.

[0012] As a preferred technical solution of the present invention, a flip motor is provided on the side of the lifting sleeve, the output shaft of the flip motor is fixedly connected to the first pulley, the first pulley is connected to the second pulley through a synchronous belt, the second pulley is fixedly connected to the main shaft, and a counterweight head is provided at the end of the main shaft away from the fixed block.

[0013] As a preferred technical solution of the present invention, the milling assembly includes a telescopic motor arranged on the side of the flip beam, the protruding end of the telescopic motor is connected to the fixed platform, and guide slide rods slidably connected to the flip beam are arranged on both sides of the fixed platform. A rotating motor is arranged in the middle of the fixed platform, and the output shaft of the rotating motor is fixedly connected to the milling cutter.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects:

[0015] By setting an angle adjustment component and a clamping drive component to adjust the inclination angle and extension length of the L-shaped clamping rod, the clamping rotation mechanism can effectively clamp spherical shell workpieces of different sizes. In the milling process, the spherical shell workpiece rotates on itself and the milling cutter revolves around the spherical shell workpiece, so that the milling cutter can effectively mill the entire spherical surface of the spherical shell workpiece. The position adjustment of the entire equipment adopts the form of a screw nut, and there is no need for a high-precision control unit, which greatly reduces the processing cost and control cost of the milling machine. The structure of the screw nut is stable, which makes the entire milling machine more stable and the subsequent maintenance cost is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 The figure is a schematic diagram of the structure of a milling machine for metal processing.

[0018] Figure 2 This is a schematic diagram of the structure of a metal processing milling machine after removing a spherical shell-shaped workpiece.

[0019] Figure 3 for Figure 2 Right view of .

[0020] Figure 4 The figure is a schematic diagram of the structure of a clamping and rotating mechanism in a milling machine for metal processing.

[0021] Figure 5 The figure is a schematic diagram of the structure of an angle adjustment component in a milling machine for metal processing.

[0022] Figure 6 The figure is a schematic diagram of the structure of a clamping drive assembly in a milling machine for metal processing.

[0023] Figure 7 The figure is a schematic diagram of the structure of a flip milling mechanism in a metal processing milling machine.

[0024] Figure 8 This is a schematic diagram of the structure of a cantilever beam in a milling machine for metal processing.

[0025] Figure 9 The figure is a schematic diagram of the structure of a milling component in a milling machine for metal processing.

[0026] In the figure: 1. base; 2. spherical shell workpiece; 3. clamping and rotating mechanism; 4. flip milling mechanism; 5. rotating column; 6. rotating ring; 7. pull rod; 8. pull ring; 9. buffer spring; 10. fixed ring; 11. pulling rope; 12. tripod; 13. clamping drive assembly; 14. motor bracket; 15. rotating motor; 16. first bevel gear; 17. second bevel gear; 18. support rod; 19. locking nut; 20. ejector rod; 21. lifting collar; 22. anti-loosening spring; 23. angle adjustment assembly; 24. fixed plate; 25. flip rod sleeve; 26. L-shaped clamping rod; 27. clearance hole; 28. Fixed head; 29. ​​Guide wheel; 30. Support frame; 31. Screw; 32. Support leg; 33. Threaded sleeve; 34. U-shaped bracket; 35. Lifting sleeve; 36. Extension plate; 37. Threaded tube; 38. Lifting screw; 39. First bearing seat; 40. Spindle; 41. Fixed block; 42. Cantilever beam; 43. Transverse screw; 44. Second bearing seat; 45. Flipping motor; 46. First pulley; 47. Counterweight head; 48. Second pulley; 49. Flipping beam; 50. Milling assembly; 51. Guide slide; 52. Fixed table; 53. Rotating motor; 54. Telescopic motor; 55. Milling cutter; 56. Synchronous belt. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In one embodiment, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 7 , a milling machine for metal processing, comprising a base 1, a clamping and rotating mechanism 3 and a flip milling mechanism 4;

[0029] The clamping rotation mechanism 3 includes a rotating ring 6 rotatably connected to the middle of the base 1. The base 1 is arranged horizontally. The rotating ring 6 is rotatably connected to the middle of the base 1. The lower part of the vertically arranged rotating column 5 is fixedly connected to the middle of the rotating ring 6, and the upper end of the rotating column 5 is fixedly connected to the fixed disk 24. A groove is provided on the outer edge of the fixed disk 24. The inside of the groove is rotatably connected to the end of the flipping rod sleeve 25. The flipping rod sleeve 25 is slidably connected to the end away from the fixed disk 24 with an L-shaped clamping rod 26. The end of the L-shaped clamping rod 26 away from the flipping rod sleeve 25 is tilted upward, so that the spherical shell workpiece 2 can be placed on the L-shaped clamping rod 26. The spherical shell workpiece 2 is in the state of a hemispherical shell with an open bottom. The edge of the spherical shell workpiece 2 just falls on the L-shaped clamping rod 26, and the L The tilted portion of the L-shaped clamping rod 26 can just be stuck on the edge of the spherical shell-shaped workpiece 2, thereby realizing the clamping processing of the spherical shell-shaped workpiece 2, and the radius of the spherical shell-shaped workpiece 2 and the corresponding fillet change can be adjusted by adjusting the inclination angle of the flip rod sleeve 25 and the extended length of the L-shaped clamping rod 26, so that spherical shell-shaped workpieces 2 of different sizes can be effectively clamped. Therefore, an angle adjustment component 23 is provided on the outside of the rotating column 5, and the angle adjustment component 23 can adjust the pitch angle of the flip rod sleeve 25. At the same time, a clamping drive component 13 is provided inside the rotating column 5, and the clamping drive component 13 can pull the L-shaped clamping rod 26 to move toward the flip rod sleeve 25, so that the clamping force of the L-shaped clamping rod 26 is provided by the clamping drive component 13;

[0030] The flip milling mechanism 4 includes a U-shaped bracket 34 arranged on the rear side of the base 1, and an inclined support leg 32 is arranged on the outer side of the lower surface of the base 1. The U-shaped bracket 34 is a U-shaped structure with the opening upward, so the lower surface of the U-shaped bracket 34 is flush with the lower surface of the support leg 32, so that the cooperation between the U-shaped bracket 34 and the support leg 32 allows the milling machine to be stably placed on the ground. The rear end of the U-shaped bracket 34 is a vertical vertical rod, so a vertically arranged lifting sleeve 35 is slidably connected above the vertical rod on the rear side of the U-shaped bracket 34. The upper end of the lifting sleeve 35 is rotatably connected to the main shaft 40 set in the front and rear directions, and the front end of the main shaft 40 is fixedly connected to the fixing block 4 1, the middle part of the fixed block 41 is slidably connected to the cantilever beam 42, the cantilever beam 42 is perpendicular to the main shaft 40, and the end of the cantilever beam 42 is fixedly connected to the rear end of the flip beam 49 arranged in a front-to-back direction, the flip beam 49 is perpendicular to the cantilever beam 42, the flip beam 49, the cantilever beam 42 and the main shaft 40 are in the same plane, and a milling assembly 50 is provided at the front end of the flip beam 49. The front and rear positions of the milling assembly 50 and the rotating column 5 are the same, that is, when the main shaft 40 rotates, the surface formed by the rotation of the milling assembly 50 coincides with the center of the spherical shell workpiece 2, so the milling assembly 50 can perform milling processing on the spherical shell workpiece 2.

[0031] In one embodiment of the present invention, see Figure 5 and Figure 6 The clamping drive assembly 13 includes a tripod 12 arranged at the lower end of the rotating column 5. The rotating column 5 is a hollow columnar structure. The end of the tripod 12 is fixedly connected to the inner wall of the rotating column 5. A pull rod 7 is provided in the middle of the tripod 12. The upper end of the pull rod 7 is fixedly connected to the screw 31. The screw 31 is threadedly connected to the middle part of the tripod 12. Therefore, when the screw 31 and the pull rod 7 rotate synchronously, the screw 31 will drive the pull rod 7 to move up and down. A fixed ring 10 is rotated above the pull rod 7. A pull ring 8 is sleeved below the pull rod 7. The inner diameter of the pull ring 8 is larger than the outer diameter of the pull rod 7. Therefore, the pull ring 8 can move up and down and rotate relative to the pull rod 7. A buffer spring 9 is provided between the pull ring 8 and the fixed ring 10. The two ends of the buffer spring 9 are respectively connected to the side surfaces of the pull ring 8 and the fixed ring 10. In addition, the buffer spring 9 is sleeved on the outside of the pull rod 7, so under the action of the buffer spring 9, the pull ring 8 will move up and down with the pull rod 7, and the lower end of the pulling rope 11 is connected to the outside of the pull ring 8. The top of the pulling rope 11 passes through the hollow part of the rotating column 5 from bottom to top, and a fixed head 28 is provided on the lower surface of the flip rod sleeve 25, and a clearance hole 27 is provided in the middle of the L-shaped clamping rod 26. Therefore, the pulling rope 11 passing through the top of the rotating column 5 will pass through the clearance hole 27 of the L-shaped clamping rod 26 from top to bottom, and the upper end of the pulling rope 11 is fixedly connected to the fixed head 28. Therefore, when the pull ring 8 pulls the pulling rope 11 downward, the pulling rope 11 will pull the L-shaped clamping rod 26 to move toward the flip rod sleeve 25, and through the deformation of the buffer spring 9, the pulling rope 11 always maintains the tension. A support frame 30 is provided at the upper end of the rotating column 5. A guide wheel 29, which cooperates with the pulling rope 11, is rotatably connected to the upper end of the support frame 30. The guide wheel 29 can lift the rotating column 5, thereby preventing the pulling rope 11 from rubbing against the rotating column 5 and preventing the rotating column 5 from damaging the pulling rope 11. To improve the stability of the clamping, the number of the flip rod sleeves 25 is greater than or equal to three and is symmetrically arranged relative to the central circumference of the rotating column 5. In this application, three flip rod sleeves 25 are provided, that is, three pulling ropes 11 are provided. Therefore, three guide wheels 29 are provided at the upper end of the rotating column 5.

[0032] In one embodiment of the present invention, see Figure 3-Figure 5The angle adjustment assembly 23 includes a lifting collar 21 slidably connected to the middle of the rotating column 5. The outer side of the lifting collar 21 is rotatably connected to the lower end of the support rod 18, and the upper end of the support rod 18 is rotatably connected to the lower surface of the flip rod sleeve 25. Therefore, when the lifting collar 21 moves up and down, the support rod 18 can push the flip rod sleeve 25 to rotate around the outer edge of the fixed plate 24. A locking spring 22 is interposed between the lifting collar 21 and the rotating ring 6. The locking spring 22 is in a compressed state and is mounted on the outside of the rotating column 5. Therefore, the locking spring 22 pushes the lifting collar 21 upward. A threaded sleeve 33 is provided above the rotating column 5, and the threaded sleeve 33 is threadedly connected to the locking nut 19. A push rod 20 is provided on the lower surface of the locking nut 19. Therefore, after the locking nut 19 moves downward, the push rod 20 will push the lifting collar 21 to move downward, thereby realizing the up and down movement of the lifting collar 21 through the cooperation of the locking nut 19 and the anti-loosening spring 22. In order to prevent the locking nut 19 from loosening, two locking nuts 19 are threadedly connected to the threaded sleeve 33, and a push rod 20 is provided on the lower surface of the lower locking nut 19. When the lower push rod 20 presses the lifting collar 21 tightly, the upper locking nut 19 moves downward again and is tightly attached to the lower locking nut 19. At this time, the two locking nuts 19 will not have the problem of active rotation, so that the height of the lifting sleeve 35 is locked.

[0033] In one embodiment of the present invention, see Figure 3 、 Figure 7 and Figure 8 A motor bracket 14 is provided on the lower surface of the base 1, and a rotating motor 15 is provided on the motor bracket 14. The output shaft of the rotating motor 15 is fixedly connected to the first bevel gear 16, and the first bevel gear 16 is meshed with the second bevel gear 17. The second bevel gear 17 is fixedly connected to the outside of the rotating column 5. Therefore, the rotating motor 15 rotates the rotating column 5 through gear transmission, so that the spherical shell-shaped workpiece 2 clamped above is rotated.

[0034] In one embodiment of the present invention, see Figure 7 and Figure 8 A protruding plate 36 is provided on the rear side of the U-shaped bracket 34. The upper surface of the protruding plate 36 is fixedly connected to a vertically provided threaded tube 37. The upper part of the threaded tube 37 is threadedly connected to a vertically provided lifting screw 38. The upper part of the lifting screw 38 is rotatably connected to a first bearing seat 39. The first bearing seat 39 is fixedly connected to the rear side of the lifting sleeve 35. Therefore, when the lifting screw 38 rotates, the lifting screw 38 will screw in or out of the threaded tube 37, thereby causing the lifting sleeve 35 to move up and down along the rear side of the U-shaped bracket 34, thereby achieving the effect of adjusting the height of the lifting sleeve 35.

[0035] In one embodiment of the present invention, see Figure 7 and Figure 8 A second bearing seat 44 is provided on both sides of the cantilever beam 42. The second bearing seat 44 is rotatably connected to both sides of the transverse screw rod 43. The middle part of the transverse screw rod 43 is threadedly connected to the middle part of the fixed block 41. Therefore, when the transverse screw rod 43 rotates, the cantilever beam 42 slides along the fixed block 41, thereby achieving the effect of adjusting the distance between the milling assembly 50 and the fixed block 41, that is, adjusting the rotation radius of the milling assembly 50 when the main shaft 40 rotates, so that the milling assembly 50 can effectively mill spherical shell-shaped workpieces 2 with different diameters.

[0036] In one embodiment of the present invention, see Figure 7 and Figure 8 A flip motor 45 is provided above the rear side surface of the lifting sleeve 35. The output shaft of the flip motor 45 is fixedly connected to the first pulley 46. The first pulley 46 is connected to the second pulley 48 through a synchronous belt 56. The second pulley 48 is fixedly connected to the main shaft 40. Therefore, the flip motor 45 can rotate the main shaft 40 through the belt drive effect. A counterweight head 47 is provided at the rear end of the main shaft 40. The counterweight head 47 and the flip beam 49 are respectively arranged on both sides of the main shaft 40, so that the rotation of the flip beam 49 is more stable.

[0037] In one embodiment of the present invention, see Figure 7 and Figure 9 The milling assembly 50 includes a telescopic motor 54 arranged on the front side of the flip beam 49. The telescopic motor 54 is arranged on the side of the flip beam 49 close to the main shaft 40. The protruding end of the telescopic motor 54 is fixedly connected to the middle of the fixed platform 52. The front and rear sides of the fixed platform 52 are provided with guide slides 51 slidably connected to the flip beam 49. Therefore, the output shaft of the telescopic motor 54 is extended or retracted to adjust the distance between the fixed platform 52 and the flip beam 49. A rotating motor 53 is provided in the middle of the fixed platform 52. The output shaft of the rotating motor 53 is fixedly connected to the milling cutter 55. The rotating motor 53 can drive the milling cutter 55 to rotate, so that the surface of the spherical shell workpiece 2 is milled by the rotating milling cutter 55. The telescopic motor 54 can accurately control the milling depth of the milling cutter 55.

[0038] The lifting collar 21 moves upward under the action of the anti-loosening spring 22, and the lifting collar 21 pushes the flip rod sleeve 25 to rotate upward through the support rod 18, and the screw 31 is rotated to make the pull rod 7 move upward. At this time, under the action of gravity, the L-shaped clamping rod 26 extends in the direction away from the flip rod sleeve 25, and the spherical shell workpiece 2 that needs to be milled is taken out. The spherical shell workpiece 2 is covered with the opening downward above the rotating column 5, and the bottom of the spherical shell workpiece 2 falls on the L-shaped clamping rod 26, and the locking nut 19 below is rotated in the opposite direction. The locking nut 19 below moves upward, and the lifting collar 21 moves upward under the action of the anti-loosening spring 22. The lifting collar 21 pushes the flip rod sleeve 25 to rotate upward through the support rod 18. When the upper surface of the L-shaped clamping rod 26 is aligned with the lower surface of the spherical shell workpiece 2 After the edges are fully fitted, stop rotating the lower locking nut 19 and rotate the upper locking nut 19 downward. The two locking nuts 19 are combined and the position of the locking nut 19 is fixed, so that the direction of the flip rod sleeve 25 is fixed. Rotate the pull rod 7 in the opposite direction. The pull rod 7 drives the screw 31 to rotate in the opposite direction. The screw 31 drives the pull rod 7 to move downward. The pull rod 7 pulls the pulling rope 11 downward through the pull ring 8. The pulling rope 11 pulls the L-shaped clamping rod 26 in the direction of the rotating column 5. The L-shaped clamping rod 26 moves toward the direction of the flip rod sleeve 25. When the right angle of the L-shaped clamping rod 26 is stuck in the edge of the spherical shell-shaped workpiece 2, the L-shaped clamping rod 26 stops moving. At this time, the buffer spring 9 is compressed, the screw 31 is always subjected to upward tension, the height of the screw 31 is locked, and the L-shaped clamping rod 26 always maintains the clamping force on the spherical shell-shaped workpiece 2. At this time, the spherical shell-shaped workpiece 2 completes the clamping process.

[0039] Start the flip motor 45, which drives the spindle 40 through the belt drive, and the spindle 40 drives the cantilever beam 42 to rotate. When the cantilever beam 42 rotates to a horizontal state, the flip motor 45 is stopped, and the lifting screw 38 is rotated. The lifting screw 38 causes the lifting sleeve 35 to move downward, thereby causing the cantilever beam 42 and the flip beam 49 to move downward. When the milling assembly 50 moves to a position at the same height as the center of the spherical shell workpiece 2, the transverse screw 43 is rotated at this time. The transverse screw 43 drives the milling assembly 50 to move toward the spherical shell workpiece 2, so that the milling cutter 55 is attached to the outer wall of the spherical shell workpiece 2. In order to further verify the milling process, the milling cutter 55 is moved to the outer wall of the spherical shell workpiece 2. To check whether the cutter 55 is at the same height as the center of the spherical shell workpiece 2, the lifting screw 38 can be rotated forward and flipped again to adjust the height of the milling cutter 55 up and down so that the milling cutter 55 only contacts a point on the side of the spherical shell workpiece 2. At this time, the distance between the milling cutter 55 and the spherical shell workpiece 2 is adjusted. The flip motor 45 is driven in the reverse direction again. The flip motor 45 drives the cantilever beam 42 to rotate to a vertical state. At this time, the lifting screw 38 is rotated again. The lifting screw 38 causes the lifting sleeve 35 and the cantilever beam 42 to move downward synchronously. At this time, the milling cutter 55 falls on the top of the spherical shell workpiece 2 and contacts the top of the spherical shell workpiece 2. At this time, the position of the milling cutter 55 is fixed. The above-mentioned method of adjusting the position of the milling cutter 55 is only applicable to spherical shell workpieces 2 with a size larger than half a sphere. However, when the size of the spherical shell workpiece 2 is smaller than half a sphere, it is necessary to first confirm the size of the spherical shell workpiece 2 with a caliper, and then accurately adjust the position of the milling cutter 55 by the lifting screw 38 and the transverse screw 43.

[0040] Start the rotating motor 15, which rotates the rotating column 5 through gear transmission, thereby causing the spherical shell workpiece 2 to rotate. Start the rotating motor 53, which drives the milling cutter 55 to rotate. The milling cutter 55 then performs milling processing on the spherical shell workpiece 2, and start the flipping motor 45. The flipping motor 45 causes the milling cutter 55 to rotate up and down around the surface of the spherical shell workpiece 2. Through the cooperation of the rotating motor 15 and the flipping motor 45, the milling cutter 55 can perform milling processing on different positions of the surface of the spherical shell workpiece 2, and during the processing, the milling depth of the milling cutter 55 is controlled by the telescopic motor 54, thereby completing the milling processing of different depths on the surface of the spherical shell workpiece 2.

[0041] The present invention provides a milling machine for metal processing, which adjusts the inclination angle and extension length of the L-shaped clamping rod 26 by setting an angle adjustment component 23 and a clamping drive component 13, so that the clamping rotation mechanism 3 can effectively clamp spherical shell workpieces 2 of different sizes, and during the milling process, the spherical shell workpiece 2 rotates and the milling cutter 55 revolves around the spherical shell workpiece 2, so that the milling cutter 55 can effectively mill the entire spherical surface of the spherical shell workpiece 2. The position adjustment of the entire equipment adopts the form of a screw nut, and no high-precision control unit is required, which greatly reduces the processing cost and control cost of the milling machine. In addition, the structure of the screw nut is stable, which makes the stability of the entire milling machine better and the subsequent maintenance cost is also lower.

[0042] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A milling machine for metal processing, characterized in that: It includes a base, a clamping and rotating mechanism, and a flipping and milling mechanism; The clamping and rotating mechanism includes a rotating ring rotatably connected to the middle part of the base, the rotating ring is fixedly connected to the rotating column, a fixed disk is provided on the side of the rotating column away from the ground, a flip rod sleeve is rotatably connected to the outer side of the fixed disk, an L-shaped clamping rod is slidably connected to the side of the flip rod sleeve away from the fixed disk, a spherical shell-shaped workpiece is placed on the side of the L-shaped clamping rod away from the ground, a clamping drive assembly for driving the L-shaped clamping rod to move toward the flip rod sleeve is provided inside the rotating column, and an angle adjustment assembly for adjusting the pitch angle of the flip rod sleeve is provided on the outer side of the rotating column; The flip milling mechanism includes a U-shaped bracket arranged on the side of the base, the side of the U-shaped bracket away from the ground is slidably connected to a lifting sleeve, the end of the lifting sleeve away from the ground is rotatably connected to the main shaft, the end of the main shaft close to the rotating column is fixedly connected to a fixed block, the middle part of the fixed block is slidably connected to a cantilever beam arranged perpendicular to the main shaft, the end of the cantilever beam is fixedly connected to a flip beam arranged perpendicular to the cantilever beam, and a milling assembly is provided on the end of the flip beam away from the cantilever beam.

2. A metal processing milling machine according to claim 1, characterized in that: The clamping drive assembly includes a tripod arranged on the side of the rotating column close to the ground, a height-adjustable pull rod is provided in the middle of the tripod, a pull ring is provided on the outside of the pull rod that rises and falls with the pull rod, and the outside of the pull ring is connected to one end of the pulling rope. The rotating column is a hollow structure, and the pulling rope passes through the middle of the rotating column. A fixed head is provided on the side of the flip rod sleeve, and the fixed head is connected to the end of the pulling rope away from the pull ring. A clearance hole is provided in the middle of the L-shaped clamping rod, and the pulling rope passes through the clearance hole.

3. A metal processing milling machine according to claim 2, characterized in that: A screw threadedly connected to the tripod is provided on the side of the pull rod close to the tripod, and a fixing ring is rotatably connected to the side of the screw close to the ground. The pull ring is sleeved on the side of the pull rod close to the ground, and a buffer spring is provided between the pull ring and the fixing ring.

4. A metal processing milling machine according to claim 3, characterized in that: The number of the flip rod sleeves is greater than or equal to three, and the flip rod sleeves are symmetrically arranged relative to the axis of the rotating column. A support frame corresponding to the flip rod sleeve is provided at the end of the rotating column away from the ground, and a guide wheel cooperating with the pulling rope is provided on the support frame.

5. The metal processing milling machine according to claim 1, characterized in that: The angle adjustment assembly includes a lifting collar slidably connected to the middle of the rotating column, the outer side of the lifting collar is rotatably connected to the support rod, and the end of the support rod away from the lifting collar is rotatably connected to the side of the flip rod sleeve. An anti-loosening spring is provided between the lifting collar and the rotating ring, and a threaded sleeve is provided on the side of the rotating column away from the ground. The outer side of the threaded sleeve is threadedly connected to a locking nut, and a push rod cooperating with the lifting collar is provided on the side of the locking nut close to the threaded sleeve.

6. The metal processing milling machine according to claim 1, characterized in that: A motor bracket is provided on the side of the base, and a rotating motor is provided on the motor bracket. The output shaft of the rotating motor is fixedly connected to a first bevel gear, and the first bevel gear is meshedly connected to a second bevel gear fixedly connected to the rotating column.

7. The metal processing milling machine according to claim 1, characterized in that: The side of the U-shaped bracket is provided with an extension plate, which is fixedly connected to a threaded tube. The end of the threaded tube is threadedly connected to a lifting screw. The side of the lifting sleeve is provided with a first bearing seat rotatably connected to the lifting screw.

8. A metal processing milling machine according to claim 7, characterized in that: A second bearing seat is provided on both sides of the cantilever beam, the middle part of the second bearing seat is rotatably connected to both sides of the transverse screw rod, and the middle part of the transverse screw rod is threadedly connected to the middle part of the fixed block.

9. The metal processing milling machine according to claim 8, characterized in that: A flip motor is provided on the side of the lifting sleeve, the output shaft of the flip motor is fixedly connected to the first pulley, the first pulley is connected to the second pulley through a synchronous belt, the second pulley is fixedly connected to the main shaft, and a counterweight head is provided at the end of the main shaft away from the fixed block.

10. The metal processing milling machine according to claim 1, characterized in that: The milling assembly includes a telescopic motor arranged on the side of the flip beam, the protruding end of the telescopic motor is connected to the fixed platform, and guide slide rods slidably connected to the flip beam are arranged on both sides of the fixed platform. A rotating motor is arranged in the middle of the fixed platform, and the output shaft of the rotating motor is fixedly connected to the milling cutter.

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