Tool changing and drilling device for numerical control tool magazine machine tool production

Abstract

The invention belongs to the technical field of tool changing of numerical control machine tools, particularly relates to a tool changing and drilling device for production of a numerical control tool magazine machine tool, and provides the following scheme aiming at the problem that a clamping rod arm of an existing tool changing mechanism is integral and cannot be adaptively adjusted during tool changing: the tool changing and drilling device comprises a fixed machine table, and a sliding case is slidably mounted at the bottom of the fixed machine table; a drilling machine box is installed on the side wall of the sliding machine box in a sliding mode, a rotary drilling shaft cutter sleeve is installed at the bottom of the drilling machine box, a cutter changing mechanism is arranged at the bottom of the fixed machine table, and the cutter changing mechanism comprises a cutter changing fixing cylinder fixed to the top of the fixed machine table through bolts. In the process of taking out the tool in the drilling shaft tool sleeve and in the ejection process after the tool is clamped and fixed, the floating tool changing claw is in a hinged state and is connected through the first pneumatic push rod, when the action of ejecting the tool in the drilling shaft tool sleeve occurs, the floating tool changing claw obliquely moves downwards, and the metal fatigue caused by the tool ejecting action to the tool changing claw arm is effectively overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of tool changing for numerical control machine tools, and particularly to a tool changing and drilling device for the production of numerical control tool magazine machine tools. Background Art

[0002] In the field of modern machining, numerical control tool magazine machine tools have become key equipment for achieving efficient and precise production. With the continuous development of the manufacturing industry towards high precision, high efficiency, and high automation, the performance requirements for numerical control tool magazine machine tools are becoming increasingly stringent, and the tool changing link is of particular importance.

[0003] For example, the Chinese invention patent with the publication number CN114603386A discloses a tool changing device for a numerical control machine tool, which relates to the technical field of numerical control machine tools. Among them, a sleeve is horizontally rotatably arranged on a frame. The tool clamping assembly includes a cross bar and a vertical rod arranged perpendicular to each other. The vertical rod is vertically slidably arranged on the sleeve. A plurality of internal tooth groups are spaced on the inner ring wall of the annular transmission cavity of the rotary tooth-shaped part, and a plurality of external tooth groups are spaced on the outer ring wall of the annular transmission cavity. Each internal tooth group and external tooth group are arranged staggeredly in the circumferential direction. The power input end of the first transmission member is a first gear, and the first gear is located in the annular transmission cavity and intermittently meshes with the internal tooth group and the external tooth group. The power output end of the first transmission member drives the sleeve to rotate. In the prior art disclosed in the above patent, the following technical problems exist: During the tool change process of the numerical control machine tool, there is a downward ejection action called "top tool" when the clamping seat in the tool magazine and the clamping seat in the drill bit retract the tool. This is to eject the tool from the card slot in the tool sleeve so that the tool can be taken out and replaced. In the prior art, the tool is clamped first and then ejected during tool replacement. Only such an action can prevent the tool from falling during tool change. However, when the tool is ejected after being clamped, the clamping rod arm of the prior art is an integral structure, and the clamping head for clamping the tool cannot be adjusted. Therefore, at the moment of ejection, the clamping rod arm will press down, which will cause the clamped tool to deviate from the vertical state. This leads to two consequences. One is the metal fatigue of the clamping rod arm, and the long-term top tool action causes the clamping rod arm to deform. The other is that the tool deviates from the vertical during ejection, which will cause the tool to rub against the inner wall of the tool sleeve, resulting in tool damage. It is difficult for the prior art to solve such problems. Now, the clamping rod arms of the tool change mechanism are all integral and cannot be adaptively adjusted during tool change. Therefore, a tool changing and drilling device for the production of numerical control tool magazine machine tools is urgently needed to solve the above problems. Summary of the Invention

[0004] Based on the technical problem that the clamping rod arms of the existing tool change mechanism are all integral and cannot be adaptively adjusted during tool change, the present invention proposes a tool changing and drilling device for the production of numerical control tool magazine machine tools.

[0005] The tool changing and drilling device for the production of CNC tool magazine machine tools proposed by the present invention includes a fixed machine table. A sliding machine box is slidably installed at the bottom of the fixed machine table. A drilling machine box is slidably installed on the side wall of the sliding machine box. A rotating drilling shaft cutter sleeve is installed at the bottom of the drilling machine box. A tool changing mechanism is arranged at the bottom of the fixed machine table. The tool changing mechanism includes a tool changing fixed cylinder fixed to the top of the fixed machine table by bolts. A vertically arranged tool changing sleeve shaft is slidably installed at the bottom of the tool changing fixed cylinder. A fixed base is fixed at the bottom of the tool changing sleeve shaft. A rotating tool changing rotating seat is installed at the bottom of the fixed base through a bearing. Tool changing claw assemblies are installed at both ends of the tool changing rotating seat.

[0006] Preferably, a first sliding groove is opened at the bottom of the fixed machine table. The top of the sliding machine box is slidably clamped inside the first sliding groove. A first lead screw is installed between the two ends of the first sliding groove through a bearing. The first lead screw is threadedly sleeved and installed with the top of the sliding machine box.

[0007] Preferably, a vertically arranged second sliding groove is opened on the side wall of the sliding machine box. The drilling machine box is slidably installed with the second sliding groove. A second lead screw is installed between the top and the bottom of the second sliding groove through a bearing. The second lead screw is threadedly sleeved and installed with the drilling machine box.

[0008] Preferably, a vertically arranged lifting inner groove is opened inside the tool changing fixed cylinder. The tool changing sleeve shaft is slidably sleeved inside the lifting inner groove. A sealing top plate is fixed at the top of the tool changing sleeve shaft. A limiting convex block is arranged on the side wall of the sealing top plate. An air guide pipe is sleeved on the top of the tool changing fixed cylinder. The air guide pipe is communicated with the lifting inner groove.

[0009] Preferably, a fixed base clamping groove is opened at the top of the tool changing rotating seat. A rotating sleeve column is fixed at the middle position of the axis at the top of the fixed base clamping groove. A rotating gear is fixed at the top of the rotating sleeve column. The rotating sleeve column and the rotating gear are embedded inside the fixed base. A driving motor is fixed inside the fixed base. A driving gear is fixed on the output shaft of the driving motor. The driving gear is meshed and installed with the rotating gear.

[0010] Preferably, three pressing components are arranged at the bottom of the fixed base in a circumferential array. The pressing component includes a pressing groove opened at the bottom of the fixed base. A pressing rod is installed in the pressing groove through a bearing. A pressing roller is installed at the bottom of the pressing rod through a bearing.

[0011] Preferably, the pressing component further includes a first steering engine fixed to the inner wall of one side of the pressing groove. The output shaft of the first steering engine is fixedly matched with the fixed shaft of the pressing rod.

[0012] Preferably, the tool changing claw assembly includes a fixed tool changing claw bolted at the circumferential position of the tool changing rotating seat. One end of the bottom of the fixed tool changing claw is hinged with a horizontally arranged floating tool changing claw. A first pneumatic push rod groove is formed at the top of one end of the fixed tool changing claw. A first pneumatic push rod is hingedly installed inside the first pneumatic push rod groove, and one end of the first pneumatic push rod is hinged with the top of the floating tool changing claw.

[0013] Preferably, a semi-circular groove is formed on one side of the floating tool changing claw. A second servo motor is fitted and installed at the middle position of the semi-circular groove. The output shaft of the second servo motor is fixed with a tool changing collet. The initial position of the tool changing collet is horizontal with the floating tool changing claw. Tool clamping blocks are fixed on the inner wall of the tool changing collet.

[0014] Preferably, second pneumatic push rod grooves are formed at both ends of the floating tool changing claw where the semi-circular groove is located. A second pneumatic push rod is hingedly installed inside the second pneumatic push rod groove, and a locking rod is also hingedly installed inside the second pneumatic push rod groove. One end of the second pneumatic push rod is hinged with the side wall of the locking rod. A locking block is fixed at one end of the locking rod.

[0015] The beneficial effects of the present invention are as follows: In the process of taking out the tool in the drill shaft tool sleeve of the tool changing and drilling device for CNC tool magazine machine tools, the tool is ejected vertically downward. During the ejection process after the tool is clamped and fixed, the floating tool changing claw is in a hinged state and is connected by the first pneumatic push rod. When the action of ejecting the tool in the drill shaft tool sleeve occurs, the floating tool changing claw moves downward and obliquely, effectively overcoming the metal fatigue caused by the tool ejecting action on the tool changing claw arm.

[0016] For the tool changing and drilling device for CNC tool magazine machine tools, when the floating tool changing claw moves downward and obliquely, the tool changing collet and the clamped tool will tilt. At this time, the second servo motor adjusts the tool changing collet to always maintain a vertical state, preventing the tool from tilting and colliding with the inner wall of the drill shaft tool sleeve. The overall structural design of the tool changing claw assembly effectively prevents the damage to the tool when the tool is pressed down during tool changing. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of one side position of the overall structure of the tool changing and drilling device for CNC tool magazine machine tools proposed by the present invention; Figure 2 It is a schematic diagram of the other side position of the overall structure of the tool changing and drilling device for CNC tool magazine machine tools proposed by the present invention; Figure 3 It is a schematic diagram of the tool changing mechanism structure of the tool changing and drilling device for CNC tool magazine machine tools proposed by the present invention; Figure 4 It is a schematic diagram of the tool changing claw structure of the tool changing and drilling device for CNC tool magazine machine tools proposed by the present invention; Figure 5 Schematic diagram of the rotating gear structure of the tool changing and drilling device for the production of CNC tool magazine machine tools proposed by the present invention; Figure 6 Schematic diagram of the pressing roller structure of the tool changing and drilling device for the production of CNC tool magazine machine tools proposed by the present invention.

[0018] In the figure: 1, fixed machine platform; 2, first chute; 3, sliding machine box; 4, drilling machine box; 5, drilling shaft cutter sleeve; 6, air duct; 7, tool changing fixed cylinder; 8, tool changing sleeve shaft; 9, fixed base; 10, tool changing rotating seat; 11, second chute; 12, lifting inner groove; 13, fixed tool changing claw; 14, floating tool changing claw; 15, tool changing chuck; 16, first pneumatic push rod groove; 17, first pneumatic push rod; 18, tool block; 19, second pneumatic push rod; 20, locking rod; 21, locking block; 22, fixed base card slot; 23, rotating gear; 24, rotating sleeve column; 25, pressing rod; 26, pressing roller. Detailed implementation manners

[0019] Refer to Figures 1-6 , the tool changing and drilling device for the production of CNC tool magazine machine tools, including a fixed machine platform 1, a sliding machine box 3 is slidably installed at the bottom of the fixed machine platform 1, a drilling machine box 4 is slidably installed on the side wall of the sliding machine box 3, a rotating drilling shaft cutter sleeve 5 is installed at the bottom of the drilling machine box 4, a tool changing mechanism is arranged at the bottom of the fixed machine platform 1, the tool changing mechanism includes a tool changing fixed cylinder 7 fixed to the top of the fixed machine platform 1 by bolts, a vertically arranged tool changing sleeve shaft 8 is slidably installed at the bottom of the tool changing fixed cylinder 7, a fixed base 9 is fixed to the bottom of the tool changing sleeve shaft 8, a rotating tool changing rotating seat 10 is installed at the bottom of the fixed base 9 through a bearing, and tool changing claw assemblies are installed at both ends of the tool changing rotating seat 10.

[0020] Further, a first chute 2 is opened at the bottom of the fixed machine platform 1, the top of the sliding machine box 3 is slidably clamped inside the first chute 2, a first lead screw is installed between the two ends of the first chute 2 through a bearing, and the first lead screw is threadedly sleeved and installed with the top of the sliding machine box 3.

[0021] Further, a vertically arranged second chute 11 is opened on the side wall of the sliding machine box 3, the drilling machine box 4 is slidably installed between the second chute 11, a second lead screw is installed between the top and the bottom of the second chute 11 through a bearing, and the second lead screw is threadedly sleeved and installed with the drilling machine box 4.

[0022] Further, a vertically arranged lifting inner groove 12 is opened inside the tool changing fixed cylinder 7, the tool changing sleeve shaft 8 is slidably sleeved inside the lifting inner groove 12, a sealing top plate is fixed to the top of the tool changing sleeve shaft 8, a limiting convex block is arranged on the side wall of the sealing top plate, an air duct 6 is sleeved on the top of the tool changing fixed cylinder 7, and the air duct 6 is communicated with the lifting inner groove 12.

[0023] Further, a fixed base card slot 22 is provided at the top of the tool changing rotating seat 10. In the middle of the top of the fixed base card slot 22 at the axis position, a rotating sleeve column 24 is fixed. A rotating gear 23 is fixed at the top of the rotating sleeve column 24. The rotating sleeve column 24 and the rotating gear 23 are embedded into the inside of the fixed base 9. A driving motor is fixed inside the fixed base 9. A driving gear is fixed on the output shaft of the driving motor. The driving gear is meshed and installed with the rotating gear 23.

[0024] Further, three pressing components are arranged at the bottom of the fixed base 9 in a circumferential array distribution. The pressing component includes a pressing groove opened at the bottom of the fixed base 9. A pressing rod 25 is installed in the pressing groove through a bearing. A pressing roller 26 is installed at the bottom of the pressing rod 25 through a bearing.

[0025] Further, the pressing component further includes a first servo motor fixed on the inner wall of one side of the pressing groove. The output shaft of the first servo motor is fixedly matched with the fixed shaft of the pressing rod 25.

[0026] Further, the tool changing claw assembly includes a fixed tool changing claw 13 bolted at the circumferential position of the tool changing rotating seat 10. At the bottom position of one end of the fixed tool changing claw 13, a horizontally arranged floating tool changing claw 14 is hinged. A first pneumatic push rod groove 16 is opened at the top of one end of the fixed tool changing claw 13. A first pneumatic push rod 17 is installed in the first pneumatic push rod groove 16 through a hinge. And one end of the first pneumatic push rod 17 is hinged with the top of the floating tool changing claw 14.

[0027] Further, a semi-circular groove is opened on one side of the floating tool changing claw 14. A second servo motor is fitted and installed at the middle position of the semi-circular groove. A tool changing card sleeve 15 is fixed on the output shaft of the second servo motor. The initial position of the tool changing card sleeve 15 is horizontal with the floating tool changing claw 14. Tool clamping blocks 18 are fixed on the inner wall of the tool changing card sleeve 15.

[0028] Further, second pneumatic push rod grooves are opened at both ends of the floating tool changing claw 14 at the semi-circular groove. A second pneumatic push rod 19 is installed in the second pneumatic push rod groove through a hinge. And a locking rod 20 is installed in the second pneumatic push rod groove through a hinge. One end of the second pneumatic push rod 19 is hinged with the side wall of the locking rod 20. A locking block 21 is fixed at one end of the locking rod 20.

[0029] When the present invention is in use: When the device drills a hole, the position of the drilling machine box 4 is controlled by the first lead screw at the top and the second lead screw in the sliding machine box 3 to move, and then the drill shaft in the drill shaft cutter sleeve 5 moves to drill the workpiece. When changing the cutting tool in the drill shaft cutter sleeve 5, the tool is changed through the tool changing mechanism. First, the drilling machine box 4 is moved to the tool changing position, and the driving motor controls the rotation of the tool changing rotating seat 10 to move the tool changing claw assembly to the position of the drill shaft cutter sleeve 5. The tool changing chuck 15 is fitted with the cutting tool, and the second pneumatic push rod 19 pushes the locking rod 20 to the cutting tool, and the cutting tool is locked through the tool clamping block 18 and the locking block 21. The drill shaft cutter sleeve 5 ejects the cutting tool, and the air pipe 6 is ventilated to eject the tool changing sleeve shaft 8 downward to take out the cutting tool in the drill shaft cutter sleeve 5. The driving motor rotates to replace the cutting tool taken in another tool changing claw assembly into the drill shaft cutter sleeve 5 to realize the replacement of the cutting tool; during the process of tool replacement, in the process of taking out the cutting tool in the drill shaft cutter sleeve 5, the cutting tool is ejected vertically downward. During the ejection process after the cutting tool is clamped and fixed, the floating tool changing claw 14 is in a hinged state and is connected by the first pneumatic push rod 17. When the action of ejecting the cutting tool in the drill shaft cutter sleeve 5 occurs, the floating tool changing claw 14 moves downward obliquely. At the same time, when the floating tool changing claw 14 moves downward obliquely, the tool changing chuck 15 and the clamped cutting tool will tilt. At this time, the tool changing chuck 15 is adjusted by the second servo motor to always maintain a vertical state to prevent the cutting tool from tilting and colliding with the inner wall of the drill shaft cutter sleeve 5. The overall structural design of the tool changing claw assembly effectively prevents the damage to the cutting tool when the cutting tool is pressed down during tool replacement and the metal fatigue caused to the tool changing claw arm.

[0030] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tool changing and drilling device for a CNC tool magazine machine tool, comprising a fixed machine table (1), characterized in that: A sliding case (3) is slidably mounted on the bottom of the fixed machine platform (1), a drilling case (4) is slidably mounted on the side wall of the sliding case (3), a rotatable drilling shaft tool sleeve (5) is mounted on the bottom of the drilling case (4), and a tool changing mechanism is arranged at the bottom of the fixed machine platform (1), the tool changing mechanism comprises a tool changing fixed cylinder (7) fixed to the top of the fixed machine platform (1) by bolts, a vertically arranged tool changing sleeve shaft (8) is slidably mounted on the bottom of the tool changing fixed cylinder (7), a fixed base (9) is fixed to the bottom of the tool changing sleeve shaft (8), a rotatable tool changing rotating seat (10) is mounted on the bottom of the fixed base (9) via a bearing, and tool changing claw assemblies are mounted on both ends of the tool changing rotating seat (10).

2. The tool changing and drilling device for CNC tool magazine machine tool production according to claim 1 is characterized in that: A first slide groove (2) is provided at the bottom of the fixed machine platform (1), and the top of the sliding machine box (3) is slidably engaged in the interior of the first slide groove (2). A first screw rod is installed between the two ends of the first slide groove (2) via a bearing, and the first screw rod is installed with a threaded sleeve on the top of the sliding machine box (3).

3. The tool changing and drilling device for CNC tool magazine machine tool production according to claim 1, characterized in that: A second vertically arranged slide groove (11) is provided on the side wall of the sliding case (3); the drilling case (4) is slidably mounted on the second slide groove (11); a second screw rod is mounted between the top and bottom of the second slide groove (11) via a bearing; and the second screw rod is threadedly mounted on the drilling case (4).

4. The tool changing and drilling device for CNC tool magazine machine tool production according to claim 1, characterized in that: A vertically arranged lifting inner groove (12) is provided inside the tool changing fixed cylinder (7), the tool changing sleeve shaft (8) is slidably sleeved in the lifting inner groove (12), a sealing top plate is fixed on the top of the tool changing sleeve shaft (8), a limiting protrusion is provided on the side wall of the sealing top plate, and an air guide pipe (6) is sleeved on the top of the tool changing fixed cylinder (7), and the air guide pipe (6) is in conduction with the lifting inner groove (12).

5. The tool changing and drilling device for CNC tool magazine machine tool production according to claim 1, characterized in that: A fixed base slot (22) is provided on the top of the tool changing rotating seat (10); a rotating sleeve column (24) is fixed at the center of the top of the fixed base slot (22) at the axis position; a rotating gear (23) is fixed on the top of the rotating sleeve column (24); the rotating sleeve column (24) and the rotating gear (23) are embedded in the interior of the fixed base (9); a driving motor is fixed in the interior of the fixed base (9); a driving gear is fixed to the output shaft of the driving motor; the driving gear is meshed and installed with the rotating gear (23).

6. The tool changing and drilling device for CNC tool magazine machine tool production according to claim 1, characterized in that: The bottom of the fixed base (9) is provided with three pressing assemblies distributed in a circumferential array, the pressing assembly comprising a pressing groove opened at the bottom of the fixed base (9), a pressing rod (25) being installed inside the pressing groove via a bearing, and a pressing roller (26) being installed at the bottom of the pressing rod (25) via a bearing.

7. The tool changing and drilling device for production of CNC tool magazine machine tools according to claim 6, characterized in that: The pressing assembly further comprises a first steering gear fixed to an inner wall of one side of the pressing groove, wherein an output shaft of the first steering gear matches and is fixed to a fixed shaft of the pressing rod (25).

8. The tool changing and drilling device for production of CNC tool magazine machine tools according to claim 1, characterized in that: The tool changing claw assembly comprises a fixed tool changing claw (13) fixed by bolts at a circumferential position of a tool changing rotating seat (10); a horizontally arranged floating tool changing claw (14) is hingedly connected at the bottom position of one end of the fixed tool changing claw (13); a first pneumatic push rod groove (16) is opened at the top of one end of the fixed tool changing claw (13); a first pneumatic push rod (17) is hingedly installed inside the first pneumatic push rod groove (16), and one end of the first pneumatic push rod (17) is hingedly connected to the top of the floating tool changing claw (14).

9. The tool changing and drilling device for production of CNC tool magazine machine tools according to claim 8, characterized in that: A semicircular groove is formed on one side of the floating tool-changing claw (14), a second steering gear is fitted in the middle of the semicircular groove, a tool-changing clamping sleeve (15) is fixed to the output shaft of the second steering gear, the initial position of the tool-changing clamping sleeve (15) is kept horizontal with the floating tool-changing claw (14), and a tool clamping block (18) is fixed to the inner wall of the tool-changing clamping sleeve (15).

10. The tool changing and drilling device for production of CNC tool magazine machine tools according to claim 9, characterized in that: The floating tool changing claw (14) is provided with a second pneumatic push rod groove at both ends of the semicircular groove, a second pneumatic push rod (19) is hingedly installed inside the second pneumatic push rod groove, and a locking rod (20) is hingedly installed inside the second pneumatic push rod groove, one end of the second pneumatic push rod (19) is hingedly connected to the side wall of the locking rod (20), and a locking block (21) is fixed to one end of the locking rod (20).

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