An equipment device for multi-directional machining with variable tool angles on a precision CNC milling machine

Abstract

The present invention relates to the technical field of numerical control machine tool equipment, and specifically relates to a device for multi-directional machining with variable angles of cutting tools for a precision numerical control milling machine. The angle transformation support frame is fixedly connected to the additional fixed flange block of the spindle through flange bolts; the tool holder and tool clamp tightly hold the right end of the hexagonal connection input shaft; the inner holes of the double-row rolling bearings and the precision input bevel gears are all unified hexagonal holes. The left end of the hexagonal connection input shaft has a hexagonal shape and is connected to the double-row rolling bearings and the precision input bevel gears, and is installed in the angle transformation support frame and axially limited by a hole retaining ring. Its advantages are as follows: It solves the problem of various grooves, holes, curved surfaces, etc. with internal barbs that cannot be machined by general numerical control milling machines, and expands the range of machining features in machining; effectively improves the production quality of such products, and steeply upgrades from the past manual production method with low efficiency, high cost, and instability to the current mechanized production method with high efficiency, low cost, and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tool equipment, and more specifically to a device for multi-directional machining with variable angles of a tool on a precision numerical control milling machine. Background Art

[0002] A milling machine refers to a machine tool that uses a milling cutter to machine workpieces. Compared with traditional milling machines, a numerical control milling machine can machine arc surfaces and the like that cannot be machined by traditional milling machines according to programming. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a device for multi-directional machining with variable angles of a tool on a precision numerical control milling machine.

[0004] To achieve the above purpose, a device for multi-directional machining with variable angles of a tool on a precision numerical control milling machine is designed, which is characterized by including an angle transformation support frame, the angle transformation support frame is fixedly connected to a spindle additional fixed flange block through flange bolts; a tool holder and tool clamp, the tool holder and tool clamp tightly hold the right end of a hexagonal connection input shaft; a double-row rolling bearing and a precision input bevel gear, both of which have a unified hexagonal hole in the inner hole, the left end of the hexagonal connection input shaft has a hexagonal shape and is connected to the double-row rolling bearing and the precision input bevel gear, and is installed in the angle transformation support frame, and is axially limited by a hole retaining ring; a rolling bearing, a precision output bevel gear, a disc cutter and a balance rolling bearing, all of which have a unified hexagonal hole in the inner hole, the hexagonal connection output shaft has a hexagonal shape and is connected to the rolling bearing, the precision output bevel gear, the disc cutter and the balance rolling bearing, and is installed in the angle transformation support frame, and is locked by a lock nut and an elastic pin is inserted to prevent loosening.

[0005] The present invention also has the following preferred technical solutions:

[0006] 1. It includes a spindle machine case, a spindle additional fixed flange block is added to the spindle, there are threaded holes on both sides, and flange bolts are provided to fixedly connect to the angle transformation support frame.

[0007] 2. It includes a fixed base plate, the fixed base plate is positioned and fixed at the center of the milling machine workbench through a positioning pin, a T-shaped nut and an external hexagonal flange bolt, one end of the fixed mandrel has a threaded shaft, which is connected to the fixed base plate, and the other end installs the inner ring of a bearing, at the same time, the outer ring of the bearing is installed in the hole of the rotary mounting bracket, and then is connected to the threaded hole of the fixed mandrel through a fastening bolt.

[0008] 3. It includes workpiece positioning, the workpiece positioning is arranged on the rotary mounting bracket. Due to the upward limit of the rotary speed mounting block by the mounting bracket fixing bolt, by using an external hexagonal wrench to spin the external hexagon on the spin bolt installed on the rotary speed mounting block, the workpiece is tightly locked and pressed on the rotary mounting bracket.

[0009] Compared with the prior art, the advantages of the present invention are as follows:

[0010] 1. It solves the problem that various grooves, holes, curved surfaces, etc. with internal barbs that cannot be machined by general CNC milling machines, and expands the range of machining features in machining.

[0011] 2. It not only effectively improves the production quality of such products, but also steeply upgrades from the past manual production mode with low efficiency, high cost and instability to the current mechanized production mode with high efficiency, low cost and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 is a perspective view of part A of the present invention;

[0014] Figure 3 is a front view of part A of the present invention;

[0015] Figure 4 is a right view of part A of the present invention;

[0016] Figure 5 is a perspective view of parts B and C of the present invention;

[0017] Figure 6 is a top view of parts B and C of the present invention;

[0018] Figure 7 is a front view of parts B and C of the present invention;

[0019] Figure 8 is a right view of parts B and C of the present invention;

[0020] Figure 9 is the present invention Figure 6 sectional view taken along the C-C direction;

[0021] Figure 10 is an assembly drawing of parts B, C and D of the present invention;

[0022] Figure 11 is a front view of parts B, C and D of the present invention;

[0023] Figure 12 is a perspective view of part E of the present invention;

[0024] Figure 13 is a front view of part E of the present invention;

[0025] Figure 14 is a right view of part E of the present invention;

[0026] Figure 15It is the top view of part E of the present invention;

[0027] Figure 16 It is the present invention Figure 15 The cross-sectional view taken along the E-E direction in the present invention;

[0028] In the figure: 1. Main spindle housing; 2. Tool holder and tool clamp; 3. Additional fixed flange block for the main spindle; 4. Flange bolt; 5. Milling machine table; 6. Fixed base plate; 7. Positioning pin; 8. T-nut; 9. Hexagon flange bolt; 10. Fixed mandrel; 11. Bearing; 12. Rotary mounting bracket; 13. Fastening bolt; 14. Adjustable bolt; 15. Limit fastening bolt; 16. Mounting bracket fixing bolt; 17. Revolving speed mounting pressing block; 18. Spinning bolt; 19. Workpiece; 20. Angle transformation support frame; 21. Double-row rolling bearing; 22. Hexagon connection input shaft; 23. Retaining ring for hole; 24. Precision input bevel gear; 25. Axial adjustment tightening sleeve; 26. Rolling bearing; 27. Hexagon connection output shaft; 28. Precision output bevel gear; 29. Disc cutter; 30. Balanced rolling bearing; 31. Locking nut; 32. Elastic pin. Specific embodiments

[0029] The present invention will be further described below with reference to the accompanying drawings. The structure and principle of the present invention are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] See Figure 1 , which is a device for multi-directional machining with variable angles of a precision CNC milling machine tool. The angle transformation support frame is connected and fixed to the additional fixed flange block of the main spindle through flange bolts; the tool holder and tool clamp hold the right end of the hexagon connection input shaft tightly; the double-row rolling bearing and the precision input bevel gear both have a unified hexagon hole in the inner hole. The left end of the hexagon connection input shaft is a hexagon shape and is connected to the double-row rolling bearing and the precision input bevel gear, and is installed in the angle transformation support frame, axially limited by the retaining ring for hole; the rolling bearing, the precision output bevel gear, the disc cutter, and the balanced rolling bearing all have a unified hexagon hole in the inner hole. The hexagon connection output shaft is a hexagon shape and is connected to the rolling bearing, the precision output bevel gear, the disc cutter, and the balanced rolling bearing, and is installed in the angle transformation support frame, locked by the locking nut, and an elastic pin is inserted to prevent loosening.

[0031] See Figures 2 - 4 , in a preferred embodiment, the device further includes a main spindle housing. An additional fixed flange block for the main spindle is installed on a general machine tool main spindle, with threaded holes on both sides, and is connected and fixed to the angle transformation support frame with flange bolts.

[0032] The working principle is as follows: Under the electromechanical control system, the spindle housing can provide rotational power, various rotational speed controls, and precise up-and-down displacements through program codes, and output the power to the tool holder and tool clamp to enable the hexagonal connection input shaft installed in the tool holder and tool clamp to perform corresponding precise displacements and rotational movements.

[0033] See Figures 12 - 16 , which is a schematic diagram of part E of the present invention. The angle conversion support frame is fixedly connected to the spindle additional fixed flange block through flange bolts; the tool holder and tool clamp hold the right end (cylindrical) of the hexagonal connection input shaft tightly; the double-row rolling bearings and precision input bevel gears have uniform hexagonal holes in their inner holes. The left end of the hexagonal connection input shaft has a hexagonal shape and is connected to the double-row rolling bearings and precision input bevel gears, and is installed in the angle conversion support frame and axially limited by a snap ring for hole use; the rolling bearings, precision output bevel gears, disc cutters, and balance rolling bearings have uniform hexagonal holes in their inner holes. The hexagonal connection output shaft has a hexagonal shape and is connected to the rolling bearings, precision output bevel gears, disc cutters, and balance rolling bearings, and is installed in the angle conversion support frame, locked by a lock nut, and an elastic pin is inserted to prevent loosening; in this structure, the transmission can realize the machining of features such as grooves and holes at various positions according to different design values of the angle β converted by the bevel gear transmission and the shape design conditions of various tools.

[0034] The working principle is as follows: The spindle housing drives the tool holder and tool clamp to rotate. Since the tool holder and tool clamp hold the hexagonal connection input shaft tightly, under the action of the hexagonal shape at the left end, it drives the precision input bevel gear to perform a circular motion. At the same time, under the action of the force on the involute-shaped tooth surface of the precision input bevel gear, it drives the precision output bevel gear to perform a circular motion. Furthermore, under the action of the inner hexagonal hole of the precision output bevel gear, it drives the hexagonal connection output shaft with a hexagonal shape to perform a circular motion. And under the action of the hexagonal shape of the hexagonal connection output shaft, it drives the disc cutter with an inner hexagonal hole to perform a circular motion. During this transmission process, the angle conversion support frame is fixed on the spindle additional fixed flange block, and the outer rings of all bearings are fixed in the inner hole of the angle conversion support frame. The inner rings of the bearings are in the shape of inner hexagonal holes and move circularly with the hexagonal connection input shaft and the hexagonal connection output shaft. At this time, each bearing makes the hexagonal connection input shaft, the hexagonal connection output shaft, the precision input bevel gear, the precision output bevel gear, and the disc cutter more balanced and stable during the circular motion. Finally, the disc cutter, under the electromechanical control system of the spindle housing, provides rotational power, various rotational speed controls, and precise up-and-down displacements through program codes.

[0035] See Figures 5 - 9, is a schematic diagram of parts B and C of the device of the present invention. The fixed base plate is positioned and fixed at the center of the milling machine worktable through a positioning pin, a T-nut, and an external hexagon flange bolt. One end of the fixed mandrel has a threaded shaft, which is connected to the fixed base plate. The other end installs the inner ring of the bearing. At the same time, the outer ring of the bearing is installed in the hole of the rotating mounting bracket, and then connected to the threaded hole of the fixed mandrel through a fastening bolt (the torque is adjusted reasonably, and it is required that the rotating mounting bracket does not loosen but can rotate flexibly). The milling machine worktable is a general numerical control milling machine worktable. Under the condition of the electromechanical control system, precise displacements in the front-back and left-right directions are provided through program codes to achieve corresponding precise displacements of the fixture and the product installed on the milling machine worktable. The position of the limit fastening bolt can be designed according to the actual requirement of the α angle. At the same time, the size and shape of the rotating mounting bracket can also be designed correspondingly according to the sizes and shapes of various workpieces to meet the processing needs of more and wider workpieces in practice.

[0036] The working principle is as follows: The workpiece is installed and fixed on the rotating mounting bracket. By pushing the tail handle of the rotating mounting bracket, it can be rotated under the action of the bearing. After being limited and positioned by the limit fastening bolt, use an external hexagon wrench to lock the limit fastening bolt to fix the rotating mounting bracket, thereby ensuring that the workpiece is firmly fixed. Under the condition of the electromechanical control system, precise displacements in the front-back and left-right directions are provided through program codes to achieve corresponding precise displacements of the fixture and the product installed on the milling machine worktable.

[0037] See Figure 10 and Figure 11 , is a schematic diagram of part D of the device of the present invention. According to the positioning of the workpiece on the rotating mounting bracket, due to the upward limit of the revolving speed mounting block by the mounting bracket fixing bolt, use an external hexagon wrench to spin the external hexagon on the spinning bolt installed on the revolving speed mounting block to tightly lock the workpiece on the rotating mounting bracket.

[0038] The working principle is as follows: Since there are certain variations in the height dimensions of the workpieces in mass production, resulting in a suspended state at the bottom of the workpieces. At this time, the adjustable bolt installed on the rotating mounting bracket can be adjusted and rotated to generate an appropriate displacement in the up-down direction to ensure full contact and tightness with the workpiece, so that when the workpiece is machined by the cutting tool, it will not affect the machining quality and efficiency due to severe vibration.

Claims

1. An equipment device for multi-directional machining with variable tool angles on a precision CNC milling machine, characterized in that, including an angle transformation support frame which is fixedly connected to an additional fixed flange block of the main shaft through flange bolts; a tool holder and tool clamp which tightly holds the right end of a hexagonal connection input shaft; a double-row rolling bearing and a precision input bevel gear, both of which have a unified hexagonal hole. The left end of the hexagonal connection input shaft has a hexagonal shape and is connected to the double-row rolling bearing and the precision input bevel gear, and is installed in the angle transformation support frame and axially limited by a hole retaining ring; a rolling bearing, a precision output bevel gear, a disc cutter and a balance rolling bearing, all of which have a unified hexagonal hole. The hexagonal connection output shaft has a hexagonal shape and is connected to the rolling bearing, the precision output bevel gear, the disc cutter and the balance rolling bearing, and is installed in the angle transformation support frame, locked by a lock nut, and an elastic pin is inserted to prevent loosening; also including a fixed base plate which is positioned and fixed at the center of the milling machine table through a positioning pin, a T-shaped nut and an external hexagonal flange bolt. One end of a fixed mandrel has a threaded shaft, which is connected to the fixed base plate, and the other end installs an inner ring of a bearing. At the same time, an outer ring of the bearing is installed in a hole of a rotary mounting bracket and then connected to a threaded hole of the fixed mandrel through a fastening bolt; also including a workpiece positioning device which is arranged on the rotary mounting bracket. Due to the upward limit of the rotary speed mounting block by the mounting bracket fixing bolt, by using an external hexagonal wrench to spin the external hexagon of the spin bolt installed on the rotary speed mounting block, the workpiece is tightly locked and pressed on the rotary mounting bracket; the rotary mounting bracket is provided with a tail handle, and the rotary mounting bracket rotates under the action of the bearing and the tail handle. A limit fastening bolt fixes the rotary mounting bracket to limit the rotary mounting bracket; an adjustable bolt is installed on the rotary mounting bracket, and the adjustable bolt is in full contact with and presses against the workpiece under the rotation action; 2. The equipment device for multi-directional machining with variable angles of the cutter of a precision CNC milling machine according to claim 1, characterized in that, also including a main shaft machine case, an additional fixed flange block is added to the main shaft, there are threaded holes on both sides, and flange bolts are provided to connect and fix to the angle transformation support frame.

Images