Multi-degree-of-freedom modified mechanism for numerical control milling machine

Abstract

The invention provides a multi-degree-of-freedom modified mechanism for a numerical control milling machine, and relates to the technical field of numerical control milling machines. The multi-degree-of-freedom modified mechanism based on the numerical control milling machine comprises a workbench, a mounting table is fixedly connected to the middle of the upper portion of the workbench, fixing bases are fixedly connected to the two sides of the upper portion of the mounting table, and a first servo motor and a second servo motor are fixedly connected to the upper portions of the two fixing bases correspondingly; and one side of the second servo motor is fixedly connected with a motor server. The first servo motor and the second servo motor are arranged and matched with the rotating disc and the bridge plate, a workpiece can be fixed through the three-jaw fixing chuck installed above the bridge plate in the working process, then the workpiece can integrally deflect by controlling the servo motors, a milling cutter can directly make contact with the position of the side wall of the corresponding workpiece in the lifting feeding process, and the machining precision is improved. The machining freedom degree is increased, through simple modification, the machining condition of the shaft sleeve is met, and a special machining center does not need to be purchased.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled milling machines, in particular to a multi-degree-of-freedom modification mechanism for numerically controlled milling machines. Background Art

[0002] CNC milling machines are an automatic processing equipment developed on the basis of general milling machines. The processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine. Among them, CNC milling machines with tool magazines are also called machining centers. Compared with the three-axis freedom processing of ordinary CNC milling machines, general machining centers have more degrees of freedom, and usually set up tool magazine tool changing mechanisms in the milling head part. Although the processing accuracy and processing efficiency are higher and more flexible, the equipment procurement cost is also higher.

[0003] In the processing steps of the shaft sleeve, since some processing steps require milling grooves on the inner wall of the shaft sleeve, ordinary CNC lathes cannot meet the processing requirements. The existing solution is to decompose the processing steps, or directly perform processing through a machining center. Decomposing the processing steps will greatly increase the processing time, but purchasing a machining center specifically for this purpose will produce performance overflow, and the procurement investment and depreciation costs are high, which will also greatly increase the processing cost of the workpiece and reduce product competitiveness. Therefore, a multi-degree-of-freedom modification mechanism for ordinary CNC milling machines is needed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-degree-of-freedom modification mechanism for a CNC milling machine. By modifying the existing milling machine, the problem that the existing ordinary CNC lathes cannot meet the processing requirements in the processing of the inner and outer surfaces of the sleeve, but it is wasteful to purchase a machining center specifically for this purpose is solved.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention implements a multi-degree-of-freedom modification mechanism for a CNC milling machine through the following technical solutions, including a workbench, a mounting platform is fixedly connected to the middle of the upper part of the workbench, both sides of the upper part of the mounting platform are fixedly connected to a fixed base, a first servo motor and a second servo motor are fixedly connected to the upper parts of the two fixed bases respectively, a motor servo is fixedly connected to one side of the second servo motor, a rotating disk is fixedly connected to the output ends of the first servo motor and the second servo motor, a semicircular connecting disk is fixedly connected to the sides of the two rotating disks away from the first servo motor and the second servo motor respectively, a bridge plate is arranged between the two semicircular connecting disks, and a three-claw fixed chuck is fixedly connected to the center of the upper part of the bridge plate;

[0008] Two screw fixing holes are provided on both sides of the upper part of the two semicircular connecting plates, and hexagon socket screws are arranged inside the multiple screw fixing holes. T-shaped slots are provided on both sides of the upper part of the two rotating plates close to the bridge plate, and two limit nuts are arranged inside the four T-shaped slots, and the positions of the multiple limit nuts correspond to the positions of the hexagon socket screws respectively.

[0009] Preferably, the first servo motor and the second servo motor are both electrically connected to a motor servo, and the motor servo is electrically connected to a controller of a CNC milling machine.

[0010] Preferably, the motor servo is electrically connected to a controller of a CNC milling machine.

[0011] Preferably, both ends of the bridge plate are fixedly connected to the bottom planes of the two semicircular connecting plates respectively.

[0012] Preferably, the plurality of limit nuts are all hexagonal nuts, and the width of the hexagonal nuts corresponds to the inner width of the T-slot.

[0013] Preferably, both upper sides of the two semicircular connecting plates are fixedly connected to the corresponding T-slots through two limiting nuts and two limiting nuts.

[0014] Preferably, spare grooves identical to the T-shaped grooves are provided on both sides below one side of the two rotating disks close to the bridge plate.

[0015] (III) Beneficial effects

[0016] The present invention provides a multi-degree-of-freedom modification mechanism for a CNC milling machine. It has the following beneficial effects:

[0017] The present invention is provided with a first servo motor and a second servo motor, which cooperate with a rotating disk and a bridge plate. When working, the workpiece can be fixed by a three-jaw fixed chuck installed above the bridge plate, and then the workpiece can be deflected as a whole by controlling the servo motor, so that the milling cutter can directly contact the corresponding workpiece side wall position when lifting and lowering the cutter, thereby increasing the processing freedom. Through simple modification, the processing conditions of the bushing are met, there is no need to purchase a special machining center, and the processing cost of the bushing is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a left-side stereoscopic schematic diagram of the present invention;

[0019] Figure 2 It is a right-side stereoscopic schematic diagram of the present invention;

[0020] Figure 3 It is a front structural schematic diagram of the present invention;

[0021] Figure 4It is a schematic diagram of the rotating disk structure of the present invention.

[0022] Among them, 1. workbench; 2. mounting table; 3. fixed base; 4. first servo motor; 5. second servo motor; 6. rotating disk; 7. T-slot; 8. semicircular connecting disk; 9. bridge plate; 10. three-jaw fixed chuck; 11. motor servo; 12. screw fixing hole; 13. limit nut; 14. hexagon socket screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example:

[0025] like Figure 1-4 As shown, an embodiment of the present invention provides a multi-degree-of-freedom modification mechanism for a CNC milling machine, comprising a workbench 1, a mounting table 2 is fixedly connected to the upper middle portion of the workbench 1, fixed bases 3 are fixedly connected to both sides of the upper portion of the mounting table 2, a first servo motor 4 and a second servo motor 5 are fixedly connected to the upper portions of the two fixed bases 3, a motor servo 11 is fixedly connected to one side of the second servo motor 5, the first servo motor 4 and the second servo motor 5 are both electrically connected to the motor servo 11, the motor servo 11 is electrically connected to the controller of the CNC milling machine, the motor servo 11 is electrically connected to the controller of the CNC milling machine, the output ends of the first servo motor 4 and the second servo motor 5 are both fixedly connected to rotating disks 6, the two rotating disks 6 are respectively away from the first servo motor 4. A semicircular connecting disk 8 is fixedly connected to one side of the first servo motor 4 and the second servo motor 5, a bridge plate 9 is arranged between the two semicircular connecting disks 8, the two ends of the bridge plate 9 are respectively fixedly connected to the bottom planes of the two semicircular connecting disks 8, and a three-jaw fixed chuck 10 is fixedly connected to the center of the upper part of the bridge plate 9. When working, the first servo motor 4 and the second servo motor 5 provided in the present invention cooperate with the rotating disk 6 and the bridge plate 9, and then cooperate with the three-jaw fixed chuck 10, and the workpiece is fixed by the three-jaw fixed chuck 10 installed above the bridge plate. Then, the two servo motors can be controlled to rotate the bridge plate 9 to deflect the workpiece as a whole, so that the milling cutter can directly contact the corresponding side wall position of the workpiece when lifting and lowering the cutter, thereby increasing the processing freedom and meeting the processing conditions of the sleeve through simple modification;

[0026] Two screw fixing holes 12 are provided on both sides of the upper part of the two semicircular connecting plates 8, and multiple screw fixing holes 12 are provided with hexagon socket screws 14 inside. T-slots 7 are provided on both sides of the upper part of the two rotating plates 6 close to the bridge plate 9, and two limiting nuts 13 are provided inside the four T-slots 7. Multiple limiting nuts 13 are all hexagonal nuts, and the width of the hexagonal nuts corresponds to the inner width of the T-slot 7. The positions of multiple limiting nuts 13 correspond to the positions of the hexagon socket screws 14 respectively. The upper sides of the two semicircular connecting plates 8 are fixedly connected to the corresponding T-slots 7 by two limiting nuts 13 and two limiting nuts 13, so that the semicircular connecting plates 8 at both ends of the bridge plate 9 can be firmly connected to the corresponding rotating plates 6, with high installation precision and convenient disassembly and assembly.

[0027] Working principle: When the present invention is working, the first servo motor 4 and the second servo motor 5 are arranged, cooperate with the rotating disk 6 and the bridge plate 9, and then cooperate with the three-jaw fixed chuck 10. The workpiece is fixed by the three-jaw fixed chuck 10 installed above the bridge plate, and then the two servo motors can be controlled to rotate the bridge plate 9 to deflect the workpiece as a whole, so that the milling cutter can directly contact the corresponding workpiece side wall position when lifting and lowering the cutter, thereby increasing the processing freedom. Through simple modification, the processing conditions of the bushing are met, there is no need to decompose the processing steps, and there is no need to specially purchase a special processing center, thereby reducing the processing cost of the bushing.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-degree-of-freedom modification mechanism for a CNC milling machine, comprising a workbench (1), characterized in that: A mounting platform (2) is fixedly connected to the middle of the upper part of the workbench (1), and fixed bases (3) are fixedly connected to both sides of the upper part of the mounting platform (2). A first servo motor (4) and a second servo motor (5) are fixedly connected to the upper parts of the two fixed bases (3), respectively. A motor servo (11) is fixedly connected to one side of the second servo motor (5). A rotating disk (6) is fixedly connected to the output ends of the first servo motor (4) and the second servo motor (5). A semicircular connecting disk (8) is fixedly connected to the sides of the two rotating disks (6) away from the first servo motor (4) and the second servo motor (5), respectively. A bridge plate (9) is provided between the two semicircular connecting disks (8), and a three-claw fixed chuck (10) is fixedly connected to the center of the upper part of the bridge plate (9); Two screw fixing holes (12) are provided on both sides of the upper part of the two semicircular connecting plates (8), and a plurality of hexagon socket screws (14) are provided inside the plurality of screw fixing holes (12). T-shaped slots (7) are provided on both sides of the upper part of one side of the two rotating plates (6) close to the bridge plate (9), and two limiting nuts (13) are provided inside the four T-shaped slots (7), and the positions of the plurality of limiting nuts (13) respectively correspond to the positions of the hexagon socket screws (14).

2. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 1, characterized in that: The first servo motor (4) and the second servo motor (5) are both electrically connected to a motor servo (11), and the motor servo (11) is electrically connected to a controller of a CNC milling machine.

3. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 2, characterized in that: The motor servo (11) is electrically connected to a controller of a numerically controlled milling machine.

4. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 1, characterized in that: The two ends of the bridge plate (9) are respectively fixedly connected to the bottom planes of the two semicircular connecting plates (8).

5. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 1, characterized in that: The plurality of limit nuts (13) are all hexagonal nuts, and the width of the hexagonal nuts corresponds to the inner width of the T-shaped slot (7).

6. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 5, characterized in that: The upper sides of the two semicircular connecting plates (8) are fixedly connected to the corresponding T-shaped slots (7) via two limiting nuts (13) and two limiting nuts (13).

7. The multi-degree-of-freedom modification mechanism for a CNC milling machine according to claim 1, characterized in that: Spare grooves identical to the T-shaped grooves (7) are provided on both sides below one side of the two rotating disks (6) close to the bridge plate (9).

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