Automatic tool changer for numerically controlled machine tool

Abstract

This utility model discloses an automatic tool changer for CNC machine tools, comprising: a frame, a storage slot in the rear left region of the frame, a slide horizontally mounted on the inner bottom of the storage slot, electric push rods symmetrically fixed on the left and right sides of the slide, a clamping plate fixedly connected to the front output end of the electric push rod, a slide plate fixedly connected to the lower rear side of the clamping plate, the bottom rear side of the slide plate slidingly engaging with the slide, an electrically driven rotating seat fixedly connected to the top center of the slide plate, several support rods fixedly arranged in a ring array on the outer side of the top rotating end of the electrically driven rotating seat, a first ring tool holder fixedly connected to the opposite end of the support rods, a second ring tool holder fixedly connected to the outer side of the first ring tool holder, and several slots arranged in a ring array on the top of both the first and second ring tool holders, optimizing the overall tool changing path, saving tool changing time, and improving the overall tool changing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to an automatic tool changer for CNC machine tools. Background Technology

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. It achieves automated operation and precise control of the machining process through a computer control system. CNC machine tools play a vital role in industrial production and are widely used in the processing and manufacturing of various parts. The automatic tool changer system in a CNC machining center consists of two parts: a tool magazine and an automatic tool changer. Having an automatic tool changer system has two major advantages: first, only one spindle is stored in the spindle box, which simplifies the spindle structure and improves spindle rigidity; second, the tool magazine can store a large number of tools of various types and functions, facilitating the completion of various complex and multi-step machining programs. The automatic tool changer in a CNC machining center's automatic tool changer system is mainly divided into three types: direct tool change, robotic arm tool change, and turret head tool change.

[0003] Direct tool changing refers to the tool changing process being completed by the tool magazine and spindle box working together. It is mainly divided into two types: fixed tool magazine and moving tool magazine. The fixed tool magazine type usually only keeps the center position unchanged and rotates to cooperate with tool changing. The tools on the tool magazine are mostly distributed in a ring array in the slot. However, this tool changing method requires first aligning with the empty slot to remove the tool from the spindle, and then rotating the tool magazine to make the spindle align with the tool and press down to lock it in place. Each tool change requires a second rotation and adjustment of the tool magazine, which is more difficult to calibrate and more complicated than the tool changing process, thus affecting its overall tool changing efficiency and accuracy. Utility Model Content

[0004] The purpose of this invention is to provide an automatic tool changer for CNC machine tools, which can quickly complete tool unloading and loading operations in the linear tool changing path of the spindle without the need for secondary rotation of the tool magazine during tool changing operations. This shortens the replacement interval and reduces calibration difficulty, thereby optimizing the overall tool changing path, saving tool changing time, and improving the overall tool changing efficiency.

[0005] To achieve the above objectives, an automatic tool changer for CNC machine tools is provided, comprising: a frame, a servo drive system mounted on the upper right side of the frame, a sleeve fixedly connected to the left output end of the servo drive system, a spindle box fixedly connected to the inner side of the sleeve, a machine tool spindle mounted at the bottom of the spindle box, a storage groove formed in the middle left area of ​​the rear side of the frame, a slide horizontally mounted on the bottom inner side of the storage groove, electric push rods symmetrically fixed on the left and right sides of the slide, a clamping plate fixedly connected to the front output end of the electric push rod, a sliding plate fixedly connected to the lower rear side of the clamping plate, the bottom rear side of the sliding plate slidingly engaging with the slide, and an electrically driven rotating seat fixedly connected to the top center of the sliding plate. Several support rods are fixed in a ring array on the outer side of the rotating end of the part. A first ring tool holder is fixedly connected to the opposite end of the support rods. A second ring tool holder is fixedly connected to the outer side of the first ring tool holder. Several slots are arranged in a ring array on the top of both the first and second ring tool holders. Tools are fitted into the slots on the first ring tool holder. By setting the first and second ring tool holders to cooperate with several slots to store tools and to set them up alternately in pairs, the tool magazine can be rotated twice during tool changing operations. Tool unloading and loading operations can be completed quickly in the linear tool changing path of the machine tool spindle. This shortens the replacement interval and reduces the calibration difficulty, thereby optimizing the overall tool changing path, saving tool changing time, and improving the overall tool changing efficiency.

[0006] According to the aforementioned automatic tool changer for CNC machine tools, elastic washers are provided on the upper outer edge of each slot. The bottom of each elastic washer is fitted and fixed to the first and second annular tool holders, and the top of each elastic washer is pressed and fitted against the tool. This provides elastic buffering protection against the downward pressure generated during placement, docking, and unloading.

[0007] According to the aforementioned automatic tool changer for CNC machine tools, a sealing gasket is fixedly arranged around the outer rear edge of the chuck, and the outer side of the sealing gasket is pressed and fitted against the machine frame. This maintains an internal sealed state after the tool magazine is retracted and stored, preventing moisture from entering and causing contamination.

[0008] According to the aforementioned automatic tool changer for CNC machine tools, a limiting slot frame is horizontally fixed on the rear right side of the machine frame. A limiting plate slides left and right within the front slot of the limiting slot frame, and the front side of the limiting plate is fixedly connected to the sleeve frame. This ensures horizontal linear drive operation of the spindle box.

[0009] According to the aforementioned automatic tool changer for CNC machine tools, the inner side of each slot is covered with a layer of sliding film. This ensures smooth entry and exit of each tool and reduces frictional wear.

[0010] According to the aforementioned automatic tool changer for CNC machine tools, the tool is designed with a standardized tool holder and different tool heads, and the tool holder is locked in place with the upper and lower parts of the machine tool spindle. This allows for standardized loading and unloading of tools for tool changing, ensuring stable tool engagement.

[0011] The above-mentioned solution has the following beneficial effects:

[0012] In this invention, by setting up a first annular tool holder and a second annular tool holder with several slots for storing tools and setting them up alternately in pairs, the tool magazine can be rotated twice during tool changing operations without the need for secondary rotation. Tool unloading and loading operations can be completed quickly in the straight tool changing path of the machine tool spindle, shortening the replacement interval and reducing calibration difficulty. This optimizes the overall tool changing path, saves tool changing time, and improves the overall tool changing efficiency.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is an overall schematic diagram of an automatic tool changer for a CNC machine tool according to the present invention;

[0016] Figure 2 This is a schematic diagram of the connection structure of the spindle box in an automatic tool changer for a CNC machine tool according to the present invention.

[0017] Figure 3 This is a schematic diagram of the connection structure of the slide plate in an automatic tool changer for a CNC machine tool according to the present invention;

[0018] Figure 4 This is a schematic diagram of the connection structure between the first and second annular tool holders in an automatic tool changer for a CNC machine tool according to the present invention.

[0019] Legend:

[0020] 1. Frame; 2. Servo drive system; 3. Sleeve; 4. Spindle box; 5. Machine tool spindle; 6. Storage slot; 7. Carriage; 8. Electric push rod; 9. Slide plate; 10. Clamping plate; 11. Electric drive rotary seat; 12. Support rod; 13. First ring tool post; 14. Second ring tool post; 15. Slot; 16. Tool; 17. Elastic washer; 18. Limiting slot frame; 19. Limiting plate. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4 This utility model provides an automatic tool changer for a CNC machine tool, comprising: a frame 1, a servo drive system 2 mounted on the upper right side of the frame 1, a sleeve 3 fixedly connected to the left output end of the servo drive system 2, a spindle box 4 fixedly connected to the inner side of the sleeve 3, a machine tool spindle 5 mounted at the bottom of the spindle box 4, a limit slot 18 horizontally fixed on the rear right side of the frame 1, a limit plate 19 slidingly engaging with the front slot of the limit slot 18, and the front of the limit plate 19 being fixedly connected to the sleeve 3 to ensure horizontal linear drive operation of the spindle box.

[0023] A storage slot 6 is provided in the middle left area of ​​the rear side of the frame 1. A slide 7 is horizontally mounted on the bottom inner side of the storage slot 6. Electric push rods 8 are symmetrically fixed on the left and right sides of the slide 7. A clamping plate 10 is fixedly connected to the front output end of the electric push rod 8. A sliding plate 9 is fixedly connected to the lower rear side of the clamping plate 10. The bottom rear side of the sliding plate 9 slides back and forth with the slide 7. A sealing gasket is fixed around the outer edge of the rear side of the clamping plate 10. The outer side of the sealing gasket is pressed and fitted against the frame 1 to store the tool magazine and avoid it occupying processing space.

[0024] An electrically driven rotating seat 11 is fixedly connected to the top center of the slide plate 9. Several support rods 12 are fixedly arranged in a ring array on the outer side of the top rotating end of the electrically driven rotating seat 11. A first ring tool holder 13 is fixedly connected to the opposite end of the support rods 12. A second ring tool holder 14 is fixedly connected to the outer side of the first ring tool holder 13. Several slots 15 are arranged in a ring array on the top of both the first ring tool holder 13 and the second ring tool holder 14. The inner side of the slot 15 is covered with a layer of sliding film. Cutting tools are fitted into the slots 15 on the first ring tool holder 13. 16. The tool 16 is designed with a standardized tool holder and different tool head combinations. Its tool holder is locked in place with the upper and lower parts of the machine tool spindle 5. Elastic washers 17 are provided on the upper outer edge of the slot 15. The bottom of the elastic washers 17 is fixed in contact with the first ring tool holder 13 and the second ring tool holder 14. The top of the elastic washers 17 is pressed and fitted against the tool 16. This allows the tool magazine to be rotated twice during tool changing, and the tool unloading and loading operations can be completed quickly in the straight tool changing path of the machine tool spindle 5, shortening the replacement interval and reducing the calibration difficulty.

[0025] Working principle: In this utility model, by setting the first annular tool holder 13 and the second annular tool holder 14 in conjunction with several slots 15 to lock and store the cutting tools 16 and set them up alternately in pairs, the tool magazine can be rotated twice during the tool changing operation. The tool unloading and loading operations can be completed quickly in the straight tool changing path of the machine tool spindle 5, shortening the replacement interval and reducing the calibration difficulty, thereby optimizing the overall tool changing path, saving tool changing time, and improving the overall tool changing efficiency.

[0026] During tool changing, rotate the tool magazine during the ejection process to place the required tool 16 on the far right. Then, control the spindle box 4 and the machine tool spindle 5 to move linearly to the left to the top of the outer slot 15, press down to unload the tool, and then move up to return to the original position. Then, move to the left again to the top of the tool 16, press down to load the tool, and then move up to return to the original position to complete the tool changing. After completion, the spindle box 4 returns to the right and the tool magazine retracts for storage.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An automatic tool changer for a CNC machine tool, comprising: A frame (1) is provided with a servo drive system (2) mounted on the upper right side of the frame (1). A sleeve (3) is fixedly connected to the left output end of the servo drive system (2). A spindle box (4) is fixedly connected to the inner side of the sleeve (3). A machine tool spindle (5) is mounted at the bottom of the spindle box (4). The frame (1) is characterized in that a storage groove (6) is provided in the middle left area of ​​the rear side of the frame (1). A slide (7) is horizontally mounted on the inner bottom of the storage groove (6). Electric push rods (8) are symmetrically fixed on the left and right sides of the slide (7). A clamping plate (10) is fixedly connected to the front output end of the electric push rod (8). A sliding plate (10) is fixedly connected to the lower rear side of the clamping plate (10). 9), the bottom rear side of the slide plate (9) is slidably engaged with the slide frame (7) in a back-and-forth manner. An electric drive rotating seat (11) is fixedly connected to the top center of the slide plate (9). Several support rods (12) are fixedly arranged in a ring array on the outer side of the top rotating end of the electric drive rotating seat (11). A first ring tool holder (13) is fixedly connected to the opposite end of the support rod (12). A second ring tool holder (14) is fixedly connected to the outer side of the first ring tool holder (13). Several slots (15) are arranged in a ring array on the top of both the first ring tool holder (13) and the second ring tool holder (14). Cutting tools (16) are fitted into the slots (15) on the first ring tool holder (13) in a vertical engagement.

2. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that, Elastic washers (17) are provided on the upper outer edge of the slot (15). The bottom of the elastic washers (17) is fitted and fixed to the first annular tool holder (13) and the second annular tool holder (14). The top of the elastic washers (17) is pressed and fitted to the tool (16).

3. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that, A sealing gasket is fixed around the outer rear edge of the card plate (10), and the outer side of the sealing gasket is pressed and fitted against the frame (1).

4. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that, The rear right side of the frame (1) is horizontally fixed with a limiting slot (18), and the front slot of the limiting slot (18) is slidably fitted with a limiting plate (19). The front side of the limiting plate (19) is fixedly connected to the sleeve (3).

5. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that, The inner side of the slot (15) is covered with a layer of slip film.

6. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that, The cutting tool (16) is designed with a unified tool holder and different tool head combinations. Its tool holder is locked to the upper and lower parts of the machine tool spindle (5).

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