Tool changing device of machine tool

Abstract

The utility model provides a tool changer of a machine tool, which comprises a first moving device arranged on a tool body, a second moving device arranged on the first moving device, a rotary driving device arranged on the second moving device, a cutterhead arranged on the rotary driving device, and a radial tool mounting groove arranged on the cutterhead. A first cutter fixing screw hole is formed in the groove bottom of the radial cutter mounting groove; an adapter positioning groove is formed in the cutter head in the circumferential direction, and adapter fixing screw holes are formed in the two sides of the adapter positioning groove correspondingly. A first adapter and a second adapter are further included. According to the utility model, the first adapter and the second adapter are matched with the cutterhead for use, so that the compatibility of the cutterhead to cutter installation is improved, and the installation mode of the cutter on any cutter installation position on the cutterhead can be flexibly adjusted as required.

Description

Technical Field

[0001] The utility model relates to the technical field of lathes, and particularly relates to a tool changing device for a machine tool. Background Art

[0002] An automatic tool changing device is usually provided on existing numerically controlled lathes. Among them, a rotary tool changing device is a commonly used type of tool changing device. The rotary tool changing device realizes the tool changing process through the rotation of a tool disc (tool rest).

[0003] Multiple tool mounting positions are usually provided on the tool disc (tool rest). The tool disc can mount multiple tools at the same time. During the machining process, the control system will automatically select a suitable tool for cutting operation according to the machining requirements.

[0004] The mounting methods of the tools corresponding to different machining purposes are also completely different. When performing external turning on a workpiece, an external turning tool is required. Since the external turning tool feeds along the radial direction of the workpiece, the external turning tool is mounted along the radial direction of the workpiece during installation; when machining a center hole of the workpiece, a drilling tool is required. Since the drilling tool feeds along the axial direction of the workpiece during the machining process, the drilling tool needs to be mounted along the axial direction of the workpiece.

[0005] However, for some miniaturized numerically controlled lathes, due to size limitations, the diameter of their tool disc (tool rest) is relatively small, the number of tool mounting positions on the tool disc is also relatively small (usually 4 - 8), and each tool mounting position can usually only achieve one mounting method. This leads to certain limitations on the mounting methods of the tools on the tool disc, poor mounting compatibility for the tools, and inability to flexibly adjust the mounting method of the tool according to needs at any tool mounting position, bringing certain inconvenience to actual machining. Summary of the Invention

[0006] The purpose of the utility model is to solve the deficiencies in the prior art and provide a tool changing device for a machine tool.

[0007] The purpose of the utility model is achieved through the following technical solutions: A tool changing device for a machine tool includes a first moving device arranged on the lathe bed. A second moving device is arranged on the first moving device. A rotary driving device is arranged on the second moving device. A tool disc is arranged on the rotary driving device. A radial tool mounting groove is arranged on the tool disc. A first tool fixing screw hole is arranged at the bottom of the radial tool mounting groove. An adapter positioning groove is arranged on the circumference of the tool disc. Adapter fixing screw holes are respectively arranged on both sides of the adapter positioning groove.

[0008] It further includes a first adapter and a second adapter. The first adapter is provided with a first positioning boss that mates with the adapter positioning groove, a first bolt through-hole corresponding to the adapter fixing screw hole, and a tool mounting hole for mounting a tool. Tool locking screw holes are respectively provided on both sides of the tool mounting hole;

[0009] The second adapter is provided with a second positioning boss that mates with the adapter positioning groove, a second bolt through-hole corresponding to the adapter fixing screw hole, and an axial tool mounting groove for mounting a tool. A second tool fixing screw hole is provided at the bottom of the axial tool mounting groove.

[0010] Preferably, the first moving device includes a first lead screw and a first guide rail provided on the bed body. Both ends of the first lead screw are rotatably connected to the bed body; a first moving frame is slidably connected to the first guide rail; a first lead screw nut is provided on the first moving frame, and the first lead screw nut is connected to the first lead screw; one end of the first lead screw is connected to a first motor.

[0011] Preferably, the second moving device includes a second lead screw and a second guide rail provided on the first moving frame. A second moving frame is slidably connected to the second guide rail; both ends of the second lead screw are rotatably connected to the second moving frame, and one end of the second lead screw is connected to a second motor; a second lead screw nut is provided on the second moving frame, and the second lead screw nut is connected to the second lead screw; the rotation driving device is provided on the second moving frame.

[0012] Preferably, the second guide rail is perpendicular to the first guide rail.

[0013] Preferably, the inclination angle between the second guide rail and the horizontal plane is 30 - 45 degrees.

[0014] Preferably, the rotation driving device includes a servo motor and a speed reducer. The output shaft of the servo motor is connected to the input shaft of the speed reducer, and the tool disc is connected to the output shaft of the speed reducer.

[0015] Preferably, the tool disc is a regular octagon, and eight radial tool mounting grooves are provided on the tool disc.

[0016] The beneficial effect of the present utility model is: In the present utility model, through the combined use of the first adapter and the second adapter with the tool disc, the compatibility of the tool disc for tool installation is improved, enabling the installation method of the tool to be flexibly adjusted according to needs at any tool installation position on the tool disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present utility model.

[0018] Figure 2 It is a structural schematic diagram when the first adapter and the second adapter are installed on the tool disc.

[0019] Figure 3 It is a schematic structural diagram of the cutter head.

[0020] Figure 4 It is a schematic structural diagram of one direction of the first adapter.

[0021] Figure 5 It is a schematic structural diagram of another direction of the first adapter.

[0022] Figure 6 It is a schematic structural diagram of the second adapter.

[0023] In the figure: 1. Bed body, 2. First guide rail, 3. First moving frame, 4. First lead screw, 5. Second guide rail, 6. Second moving frame, 7. Motor, 8. Second lead screw, 9. Rotary drive device, 10. Cutter head, 10-1. Radial tool mounting groove, 10-2. First tool fixing screw hole, 10-3. Adapter positioning groove, 10-4. Adapter fixing screw hole, 11. First adapter, 11-1. First bolt through hole, 11-2. Tool mounting hole, 11-3. First positioning boss, 11-4. Tool locking screw hole, 12. Second adapter, 12-1. Axial tool mounting groove, 12-2. Second bolt through hole, 12-3. Second tool fixing screw hole, 12-4. Second positioning boss. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0025] As Figures 1 to 6 shown, a tool changing device for a machine tool includes a first moving device provided on the bed body 1, a second moving device is provided on the first moving device, a rotary drive device 9 is provided on the second moving device, a cutter head 10 is provided on the rotary drive device 9, a radial tool mounting groove 10-1 is provided on the cutter head 10, and a first tool fixing screw hole 10-2 is provided at the bottom of the radial tool mounting groove 10-1; an adapter positioning groove 10-3 is provided on the circumference of the cutter head 10, and adapter fixing screw holes 10-4 are respectively provided on both sides of the adapter positioning groove 10-3.

[0026] It further includes a first adapter 11 and a second adapter 12. The first adapter 11 is provided with a first positioning boss 11-3 that mates with the adapter positioning groove 10-3, a first bolt through-hole 11-1 corresponding to the adapter fixing screw hole 10-4, and a tool mounting hole 11-2 for mounting a tool. Tool locking screw holes 11-4 are respectively provided on both sides of the tool mounting hole 11-2. Among them, the tool mounting hole 11-2 can be a round hole or a square, and can be specifically set according to actual needs. Locking screws are used in the tool locking screw holes 11-4. After the shank part of the tool is inserted into the tool mounting hole 11-2, the tool is tightened by the locking screws to achieve the fixation of the tool.

[0027] The second adapter 12 is provided with a second positioning boss 12-4 that mates with the adapter positioning groove 10-3, a second bolt through-hole 12-2 corresponding to the adapter fixing screw hole 10-4, and an axial tool mounting groove 12-1 for mounting a tool. A second tool fixing screw hole 12-3 is provided at the bottom of the axial tool mounting groove 12-1.

[0028] In the present utility model, the compatibility of tool installation is improved by the combined use of the first adapter 11 and the second adapter 12 with the tool disc 10. The adapter positioning grooves 10-3 on the circumference of the tool disc 10 correspond one-to-one with the radial tool installation grooves 10-1 on the tool disc 10. At the position of the radial tool installation groove 10-1 on the tool disc 10 is a tool installation position. The radial tool installation groove 10-1 on the tool disc 10 is used to realize the radial installation of the tool, that is, the installation direction is consistent with the radial direction of the tool. During installation, the shank part of the tool is inserted into the radial tool installation groove 10-1, and the tool is fixed by bolts. After the bolts pass through the bolt holes on the tool, they are connected to the first tool fixing screw holes 10-2 at the bottom of the radial tool installation groove 10-1; if axial installation of the tool needs to be realized at this tool installation position, at this time, the first adapter 11 or the second adapter 12 can be fixed to the adapter positioning groove 10-3 on the circumference of the tool disc 10. The positioning boss on the first adapter 11 or the second adapter 12 is inserted into the adapter positioning groove 10-3, and the first adapter 11 or the second adapter 12 is fixed by bolts. After the bolts pass through the bolt through holes on the first adapter 11 or the second adapter 12, they are connected to the adapter fixing screw holes 10-4 on the circumference of the tool disc 10; when the first adapter 11 is installed, the tool installation hole 11-2 on the first adapter 11 is aligned with the axis of the workpiece. The shank part of the tool is inserted into the tool installation hole 11-2, and then locking screws are installed in the tool locking screw holes 11-4 on both sides of the tool installation hole 11-2 and the tool is tightened by the locking screws to realize the axial installation of the tool. After the second adapter 12 is installed, the axial tool installation groove 12-1 is aligned with the axis of the workpiece, and the shank part of the tool is installed in the axial tool installation groove 12-1 on the first adapter 11 to realize the axial installation of the tool. When the first adapter 11 and the second adapter 12 are not needed, the first adapter 11 and the second adapter 12 can be removed from the tool disc 10.

[0029] In this embodiment, the tool disc 10 is a regular octagon, and there are eight radial tool installation grooves 10-1 on the tool disc 10. The eight radial tool installation grooves 10-1 are evenly arranged on one side of the tool disc 10.

[0030] Furthermore, the first moving device includes a first lead screw 4 and a first guide rail 2 provided on the bed 1. Both ends of the first lead screw 4 are rotatably connected to the bed 1; a first moving frame 3 is slidably connected to the first guide rail 2; a first lead screw nut is provided on the first moving frame 3, and the first lead screw nut is connected to the first lead screw 4; one end of the first lead screw 4 is connected to a first motor 7.

[0031] The second mobile device includes a second lead screw 8 and a second guide rail 5 provided on the first mobile frame 3. A second mobile frame 6 is slidably connected to the second guide rail 5. Both ends of the second lead screw 8 are rotatably connected to the second mobile frame 6, and one end of the second lead screw 8 is connected to a second motor 7. A second lead screw nut is provided on the second mobile frame 6, and the second lead screw nut is connected to the second lead screw 8. A rotary drive device 9 is provided on the second mobile frame 6. The second guide rail 5 is perpendicular to the first guide rail 2. The inclination angle between the second guide rail 5 and the horizontal plane is 30 - 45 degrees.

[0032] The first lead screw 4 is driven to rotate by the first motor 7. When the first lead screw 4 rotates, it drives the first mobile frame 3 to move along the first guide rail 2. The second lead screw 8 is driven to rotate by the second motor 7. When the second lead screw 8 rotates, it drives the second mobile frame 6 to move along the second guide rail 5.

[0033] The rotary drive device 9 includes a servo motor 7 and a speed reducer. The output shaft of the servo motor 7 is connected to the input shaft of the speed reducer, and a tool disc 10 is connected to the output shaft of the speed reducer. The servo motor 7 drives the input shaft of the speed reducer to rotate. After the input shaft is decelerated by internal gears, it drives the output shaft on the speed reducer to rotate, and finally drives the tool disc 10 to rotate, realizing the tool change process.

[0034] The present invention is not limited to the above - mentioned optimal implementation manner. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to the present application, it falls within the protection scope of the present invention.

Claims

1. A tool changing device for a machine tool, characterized in that: The invention comprises a first moving device arranged on the bed, a second moving device is arranged on the first moving device, a rotary driving device is arranged on the second moving device, a cutter disc is arranged on the rotary driving device, a radial tool mounting groove is arranged on the cutter disc, a first tool fixing screw hole is arranged at the bottom of the radial tool mounting groove; an adapter positioning groove is arranged on the circumference of the cutter disc, and adapter fixing screw holes are arranged on both sides of the adapter positioning groove; It also includes a first adapter and a second adapter, the first adapter is provided with a first positioning boss matched with the adapter positioning groove, a first bolt through hole corresponding to the adapter fixing screw hole, and a tool installation hole for installing a tool, and tool locking screw holes are respectively provided on both sides of the tool installation hole; The second adapter is provided with a second positioning boss matching the adapter positioning groove, a second bolt through hole corresponding to the adapter fixing screw hole, and an axial tool installation groove for installing the tool, and the bottom of the axial tool installation groove is provided with a second tool fixing screw hole.

2. A machine tool tool changing device according to claim 1, characterized in that: The first moving device includes a first screw rod and a first guide rail arranged on the bed, and both ends of the first screw rod are rotatably connected to the bed; a first moving frame is slidably connected to the first guide rail; a first screw rod nut is provided on the first moving frame, and the first screw rod nut is connected to the first screw rod; one end of the first screw rod is connected to the first motor.

3. A machine tool tool changing device according to claim 2, characterized in that: The second moving device includes a second screw rod and a second guide rail arranged on the first moving frame, and the second moving frame is slidably connected to the second guide rail; both ends of the second screw rod are rotatably connected to the second moving frame, and one end of the second screw rod is connected to the second motor; a second screw rod nut is provided on the second moving frame, and the second screw rod nut is connected to the second screw rod; a rotation drive device is arranged on the second moving frame.

4. A machine tool tool changing device according to claim 3, characterized in that: The second guide rail is perpendicular to the first guide rail.

5. A machine tool tool changing device according to claim 3, characterized in that: The inclination angle between the second guide rail and the horizontal plane is 30-45 degrees.

6. A machine tool tool changing device according to any one of claims 1 to 5, characterized in that: The rotary drive device comprises a servo motor and a reducer, wherein the output shaft of the servo motor is connected to the input shaft of the reducer, and the cutter disc is connected to the output shaft of the reducer.

7. A machine tool tool changing device according to any one of claims 1 to 5, characterized in that: The cutter disc is a regular octagon and is provided with eight radial cutter mounting grooves.

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