Tool changing device of milling machine

Abstract

The utility model provides a tool changer of a milling machine, and belongs to the technical field of milling machines. The tool changing device of the milling machine comprises a tool magazine and a tool changing mechanism, and further comprises a guide rail and a support, the guide rail is divided into a plurality of sections which are spliced, the two ends of the guide rail correspond to the tool magazine and the rotating head position of an external milling machine respectively, the support is fixed to an external structure, the guide rail is fixed to the support, a self-propelled seat is arranged on the guide rail, and the self-propelled seat is connected with the tool magazine. And the tool changing mechanism is arranged on the self-propelled seat. In the application, the self-moving seat automatically moves along the guide rail, so that the tool changing mechanism can move back and forth between the tool magazine and the milling machine rotary head to realize automatic tool changing, and the guide rail can be spliced according to actual conditions in a way that the tool changing mechanism automatically moves along the guide rail, so that the refitting cost is reduced, and popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machines, in particular to a tool changing device for a milling machine. Background Art

[0002] Milling machines with automatic tool changing function are usually integrated designs with high costs. However, existing ordinary milling machines and even old-style milling machines are still in large quantities, but they require manual tool changing, which is very troublesome. If an automatic tool changer is installed on an ordinary milling machine, the milling machine body needs to be modified, and the modification cost is high. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a tool changing device for a milling machine, aiming to improve the problems mentioned in the above background technology.

[0004] An embodiment of the utility model provides a tool changing device for a milling machine, including a tool magazine and a tool changing mechanism, and also including a guide rail and a bracket. The guide rail is divided into multiple sections and spliced ​​together. The two ends of the guide rail correspond to the tool magazine and the rotating head position of an external milling machine respectively. The bracket is fixed on the external structure, the guide rail is fixed on the bracket, a self-propelled seat is arranged on the guide rail, and the tool changing mechanism is arranged on the self-propelled seat.

[0005] In a specific embodiment, the tool magazine includes a base and a turntable, and the turntable is rotatably connected to the base.

[0006] In a specific embodiment, there are tool seats in a circular array on the turntable, the tool seats are telescopically and slidably connected to the turntable, a milling cutter is movably connected to the tool seats, and a push-out piece is provided on the base for pushing out the corresponding tool seats.

[0007] In the above implementation process, a servo drive mechanism is arranged behind the turntable to drive the turntable to rotate, and the tool holder at the corresponding position is pushed out by the ejection member, so as to facilitate the tool changing mechanism to take away the corresponding milling cutter. In this embodiment, the ejection member is an arc-shaped protrusion, which is fixedly connected to the central axis on the base, and the turntable is rotated on the central axis. When the turntable rotates, the protrusion will automatically push out the tool holder at the specified position. In another embodiment, the ejection member is an electric push rod. It should be noted that a conventional locking mechanism similar to that on a milling machine is arranged in the tool holder to lock the milling cutter. The milling cutter locking mechanism is a prior art and will not be described here.

[0008] In a specific implementation, the tool changing mechanism includes an electric telescopic rod and a rotating arm, the rotating arm is rotatably connected to the telescopic end of the electric telescopic rod, a motor A is provided on the rotating arm, and the output end of the motor A is connected to the shaft of the electric telescopic rod.

[0009] In the above implementation process, when working, the electric telescopic rod controls the extension and retraction of the rotating arm to pull out or insert the milling cutter from the tool holder or the rotating head of the milling machine. The motor A is used to drive the rotating arm to rotate, thereby driving the milling cutters at both ends of the rotating arm to interchange positions. It should be noted that when moving along the guide rail, the electric telescopic rod and the motor A can be extended and turned according to actual conditions to avoid interference between the tool changing mechanism and other structures.

[0010] In a specific embodiment, both ends of the rotating arm are provided with slots adapted to the milling cutter.

[0011] In the above implementation process, the rotating arm has a slot and a spring pin is arranged in the slot to clamp the milling cutter. The structural principle is the same as that of the prior art and will not be repeated here.

[0012] In a specific embodiment, the bicycle seat includes a slider, the slider is slidably connected to the guide rail, and the electric telescopic rod is installed on the slider.

[0013] In the above implementation process, the slide block has four rollers clamped on the guide rail so as to be able to move in an arc shape, and is used to move the tool changing mechanism between the tool magazine and the external milling machine rotary head.

[0014] In a specific embodiment, the self-propelled seat also includes a gear, a rack and a motor B, the gear is rotatably connected to the slider, the rack is distributed along the guide rail, the gear is meshed with the rack, the motor B is installed on the slider, and the output end of the motor B is connected to the gear shaft.

[0015] In the above implementation process, the servo-controlled motor B drives the gear to rotate, thereby moving along the rack, and then drives the tool changing mechanism to move along the guide rail. An appropriate meshing gap is set between the gear and the rack to allow turning and twisting. In this embodiment, the gap between the rack and the gear in the turning and twisting section is larger, which facilitates smooth movement, and the racks and gears at both ends of the guide rail are tightly meshed with each other, which is convenient for positioning.

[0016] In a specific implementation manner, two brackets are provided, one of which is fixed on the base, and the other is fixed on an external milling machine.

[0017] In the above implementation process, multiple sections of guide rails can be spliced ​​according to on-site conditions. The bracket on the base is used to support the guide rails near the tool magazine, while the bracket on the milling machine is used to support the guide rails near the rotating head. A torsion section is set between the two brackets. It should be noted that the torsion section needs to be as long as possible, so as to reduce the torsion angle within a unit distance to ensure smooth passage of the slider.

[0018] Compared with the prior art, the beneficial effects of the utility model are: the self-propelled seat is used to move along the guide rail, so that the tool changing mechanism can move back and forth between the tool magazine and the milling machine head to realize automatic tool changing. The way the tool changing mechanism moves along the guide rail also allows the guide rail to be spliced ​​according to actual conditions, thereby reducing the modification cost and facilitating promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of a tool changing device for a milling machine provided by an embodiment of the utility model from a first perspective;

[0021] Figure 2 A schematic diagram of a tool changing device for a milling machine provided by an embodiment of the utility model from a second viewing angle;

[0022] Figure 3 A schematic diagram of the connection relationship between the tool changing mechanism and the self-propelled seat provided in the embodiment of the utility model;

[0023] Figure 4 The utility model embodiment provides Figure 3 A partial enlarged schematic diagram in the middle.

[0024] In the figure: 10-tool magazine; 11-base; 12-turntable; 13-tool holder; 14-milling cutter; 15-ejector; 20-tool changing mechanism; 21-electric telescopic rod; 22-rotating arm; 23-motor A; 30-guide rail; 40-bracket; 50-propelling seat; 51-slider; 52-gear; 53-rack; 54-motor B. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-Figure 4The utility model provides a tool changing device for a milling machine, including a tool magazine 10 and a tool changing mechanism 20, and also including a guide rail 30 and a bracket 40. The guide rail 30 is divided into multiple sections for splicing. The two ends of the guide rail 30 correspond to the tool magazine 10 and the external milling machine's rotary head position respectively. The bracket 40 is fixed on the external structure, the guide rail 30 is fixed on the bracket 40, a self-propelled seat 50 is arranged on the guide rail 30, and the tool changing mechanism 20 is arranged on the self-propelled seat 50. Among them, the self-propelled seat 50 is used to move along the guide rail 30, so that the tool changing mechanism 20 can go back and forth between the tool magazine 10 and the milling machine's rotary head to realize automatic tool changing. The self-propelled movement of the tool changing mechanism 20 along the guide rail 30 also enables the guide rail 30 to be spliced ​​according to actual conditions, thereby reducing the modification cost and facilitating promotion.

[0027] See also Figure 1-Figure 2 The tool magazine 10 includes a base 11 and a turntable 12, which is rotatably connected to the base 11. A tool holder 13 is arranged in a circumferential array on the turntable 12, and the tool holder 13 is telescopically and slidably connected to the turntable 12. A milling cutter 14 is movably connected to the tool holder 13, and a push-out member 15 is provided on the base 11 for pushing out the corresponding tool holder 13. A servo drive mechanism is provided behind the turntable 12 to drive the turntable 12 to rotate, and the tool holder 13 at the corresponding position is pushed out by the ejection member 15, so as to facilitate the tool changing mechanism 20 to take away the corresponding milling cutter 14. In the present embodiment, the ejection member 15 is an arc-shaped protrusion, which is fixedly connected to the central axis on the base 11, and the turntable 12 is sleeved on the central axis and rotates. When the turntable 12 rotates, the protrusion will automatically push out the tool holder 13 at the specified position. In another embodiment, the ejection member 15 is an electric push rod. It should be noted that a conventional locking mechanism similar to that on a milling machine is provided in the tool holder 13 to lock the milling cutter 14. The locking mechanism of the milling cutter 14 is a prior art and will not be described here.

[0028] See also Figure 1-Figure 3 The tool changing mechanism 20 includes an electric telescopic rod 21 and a rotating arm 22. The rotating arm 22 is rotatably connected to the telescopic end of the electric telescopic rod 21. A motor A23 is arranged on the rotating arm 22. The output end of the motor A23 is axially connected to the electric telescopic rod 21. When working, the electric telescopic rod 21 controls the rotating arm 22 to extend or retract so as to pull out or insert the milling cutter 14 from the cutter seat 13 or the rotating head of the milling machine. The motor A23 is used to drive the rotating arm 22 to rotate, thereby driving the milling cutters 14 at both ends of the rotating arm 22 to exchange positions. It should be noted that when moving along the guide rail 30, the electric telescopic rod 21 and the motor A23 can be extended and retracted and turned according to actual conditions to prevent the tool changing mechanism 20 from interfering with other structures.

[0029] See also Figure 1-Figure 3 Both ends of the rotating arm 22 are provided with a slot adapted to the milling cutter 14. The rotating arm 22 has a slot and a spring pin is provided in the slot to clamp the milling cutter 14. The structural principle is the same as that of the prior art and will not be repeated here.

[0030] See also Figure 1-Figure 4 The self-propelled seat 50 includes a slider 51, which is slidably connected to the guide rail 30, and the electric telescopic rod 21 is installed on the slider 51. The slider 51 has four rollers clamped on the guide rail 30 so that it can move in an arc, and is used to move the tool change mechanism 20 between the tool magazine 10 and the external milling machine rotary head.

[0031] See also Figure 1-Figure 4 The self-propelled seat 50 further includes a gear 52, a rack 53 and a motor B54. The gear 52 is rotatably connected to the slider 51. The rack 53 is distributed along the guide rail 30. The gear 52 meshes with the rack 53. The motor B54 is mounted on the slider 51. The output end of the motor B54 is connected to the gear 52 axis. The servo-controlled motor B54 drives the gear 52 to rotate, thereby moving along the rack 53, and then drives the tool changing mechanism 20 to move along the guide rail 30. A suitable meshing gap is set between the gear 52 and the rack 53 so that it can turn and twist. In this embodiment, the gap between the rack 53 and the gear 52 in the turning and twisting section is large, which is convenient for smooth movement, and the racks 53 at both ends of the guide rail 30 are closely meshed with the gear 52, which is convenient for positioning.

[0032] See also Figure 1-Figure 2 There are two brackets 40, one of which is fixed on the base 11, and the other is fixed on the external milling machine. The multi-section guide rail 30 can be spliced ​​according to the on-site conditions. The bracket 40 on the base 11 is used to support the guide rail 30 near the tool magazine 10, and the bracket 40 on the milling machine is used to support the guide rail 30 near the rotary head. A torsion section is set between the two brackets 40. It should be noted that the torsion section needs to be as long as possible, so that the torsion angle within a unit distance can be reduced to ensure that the slider 51 passes smoothly.

[0033] The working principle of the tool changing device of the milling machine is as follows: the base 11 is fixed on the ground behind the milling machine. When changing the tool, the servo-controlled motor B54 drives the gear 52 to rotate, thereby moving along the rack 53, and then drives the tool changing mechanism 20 to move along the guide rail 30. When it moves to the position of the tool magazine 10, the electric telescopic rod 21 is extended to pull the milling cutter 14 out of the tool seat 13, and then the servo-controlled motor B54 drives the gear 52 to rotate, thereby moving along the rack 53, and then drives the tool changing mechanism 20 to move along the guide rail 30 to transport the new tool to the milling machine. The old knife is pulled out from the rotary head by the coordinated action of the electric telescopic rod 21 and the motor A23, and then the motor A23 rotates 180 degrees to interchange the positions of the old knife and the new knife, and the new knife is inserted into the rotary head. In summary, the self-propelled seat 50 is used to move along the guide rail 30, so that the tool changing mechanism 20 can move back and forth between the tool magazine 10 and the rotary head of the milling machine to realize automatic tool changing. The self-propelled manner of the tool changing mechanism 20 moving along the guide rail 30 also allows the guide rail 30 to be spliced ​​according to actual conditions, thereby reducing the modification cost and facilitating promotion.

[0034] The above are only embodiments of the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present invention shall be included in the scope of protection of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A tool changing device for a milling machine, comprising a tool magazine (10) and a tool changing mechanism (20), characterized in that: It also includes a guide rail (30) and a bracket (40), wherein the guide rail (30) is divided into multiple sections and spliced ​​together, and the two ends of the guide rail (30) correspond to the tool magazine (10) and the rotating head position of an external milling machine respectively, and the bracket (40) is fixed on the external structure, and the guide rail (30) is fixed on the bracket (40). A self-propelled seat (50) is arranged on the guide rail (30), and the tool changing mechanism (20) is arranged on the self-propelled seat (50).

2. A tool changing device for a milling machine according to claim 1, characterized in that: The tool magazine (10) comprises a base (11) and a rotating disk (12), and the rotating disk (12) is rotatably connected to the base (11).

3. A tool changing device for a milling machine according to claim 2, characterized in that: The rotary disk (12) has a knife seat (13) in a circular array, the knife seat (13) is telescopically and slidably connected to the rotary disk (12), a milling cutter (14) is movably connected to the knife seat (13), and a push-out member (15) is provided on the base (11) for pushing out the corresponding knife seat (13).

4. A tool changing device for a milling machine according to claim 3, characterized in that: The tool changing mechanism (20) comprises an electric telescopic rod (21) and a rotating arm (22); the rotating arm (22) is rotatably connected to the telescopic end of the electric telescopic rod (21); a motor A (23) is arranged on the rotating arm (22); and the output end of the motor A (23) is connected to the shaft of the electric telescopic rod (21).

5. A tool changing device for a milling machine according to claim 4, characterized in that: Both ends of the rotating arm (22) are provided with slots adapted to the milling cutter (14).

6. A tool changing device for a milling machine according to claim 5, characterized in that: The bicycle seat (50) comprises a slider (51), the slider (51) is slidably connected to the guide rail (30), and the electric telescopic rod (21) is mounted on the slider (51).

7. A tool changing device for a milling machine according to claim 6, characterized in that: The self-propelled seat (50) further comprises a gear (52), a rack (53) and a motor B (54); the gear (52) is rotatably connected to the slider (51); the rack (53) is distributed along the guide rail (30); the gear (52) is meshed with the rack (53); the motor B (54) is mounted on the slider (51); and the output end of the motor B (54) is connected to the shaft of the gear (52).

8. A tool changing device for a milling machine according to claim 2, characterized in that: Two brackets (40) are provided, one of which is fixed on the base (11), and the other of which is fixed on an external milling machine.

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