A multi-station turning-milling combined numerical control machine tool automatic tool changer

Abstract

The utility model relates to tool changing technology field of numerical control machine tool especially is a kind of multi-station turning and milling composite numerical control machine tool automatic tool changing mechanism, including tray structure, tool magazine structure and locking cover, the tray structure rear end is provided with tool magazine structure, the tool magazine structure rear end is provided with locking cover, the tray structure includes anchor plate, servo motor, driving gear, shaft spare and push cutter spare, the anchor plate left side front end is provided with push cutter spare, the tool magazine structure includes sleeve disc, driven gear, locking spare and elastic piece, in the utility model, the handle of knife is clamped by manipulator, the handle of knife is placed by sliding towards the inside of connecting cylinder, the handle of knife is extruded and moves with rubber block bevel, second buffer spring is in compressed state, so that rubber block and handle of knife outside resist and fit, elastic spring piece and handle of knife front end resist and fit, the tool changing mechanism of adoption carries out sliding locking limiting processing to the handle of knife that manipulator inserts and installs by locking spare and elastic piece.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool tool changing technology, specifically an automatic tool changing mechanism for a multi-station turning and milling composite CNC machine tool. Background Technology

[0002] The automatic tool changer of a multi-station milling and turning CNC machine tool is used for storing and replacing tools. Under the control of the CNC program, it can automatically complete the storage, selection, exchange and loading / unloading of tools in conjunction with the clamping and transport of the robot. It is an important structure for realizing the centralized processing of multiple processes in one workpiece clamping. Taking the automatic tool changer of the multi-station milling and turning CNC machine tool mentioned above as an example.

[0003] Existing automatic tool changers for multi-station milling and turning CNC machine tools use electric locking devices to lock and limit the tool holders inserted into the robot arm. However, it is inconvenient to replace these locking devices. When changing tools, the rotation adjustment of the tool changer mechanism is not convenient to coordinate with the pusher to push out the tool holder, which affects the tool changer's processing speed. Therefore, to address the above problems, an automatic tool changer for multi-station milling and turning CNC machine tools is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic tool changer for a multi-station milling and turning composite CNC machine tool, which solves the problems mentioned above, such as the inconvenience of replacing the locking parts, the difficulty of adjusting the rotation of the tool changer mechanism to cooperate with the pusher to push out the tool holder when changing tools, and the impact on the tool changer speed of the robot.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic tool changer for a multi-station milling and turning CNC machine tool includes a carrier plate structure, a tool magazine structure, and a locking cover. The tool magazine structure is located at the rear end of the carrier plate structure, and the locking cover is located at the rear end of the tool magazine structure. The carrier plate structure includes an anchor plate, a servo motor, a drive gear, a shaft, and a pusher. The servo motor is fixedly connected to the front right side of the anchor plate, and the drive gear is fixedly connected to the end of the servo motor spindle. The shaft is located inside the anchor plate, and the pusher is located at the front left side of the anchor plate. The tool magazine structure includes a sleeve plate, a driven gear plate, a locking element, and an elastic element. The driven gear plate is fixedly connected to the outside of the sleeve plate, and the driven gear plate meshes with the drive gear. The locking element is located inside the front end of the sleeve plate, and the elastic element is located at the rear end of the sleeve plate.

[0007] Preferably, the shaft component includes a ball bearing, a bearing cap, a shaft rod, an annular plate, and a threaded block. The ball bearing is placed inside the anchoring disc, and the bearing cap is inserted into the outer ring of the ball bearing. Bolts are threaded into the bearing cap and one end of the anchoring disc. The shaft rod is mounted on the inner ring of the ball bearing via a key block. An annular plate is fixedly connected to the outer side of the shaft rod, and a threaded block is fixedly connected to the rear end of the shaft rod. A locking cap is threaded onto the outer side of the threaded block.

[0008] Preferably, the pusher component includes an electric cylinder device, a cover plate, a connecting rod, a sleeve cover, and a first buffer spring. The electric cylinder device is fixedly connected to the front end of the anchoring plate, the cover plate is fixedly connected to the output end of the electric cylinder device, the connecting rod is fixedly connected to the rear end of the cover plate, the connecting rod is slidably disposed inside the anchoring plate, the sleeve cover is fixedly connected to the outer side of the connecting rod, and a first buffer spring is disposed between the inner wall of the rear end of the sleeve cover and the annular plate at the front end of the anchoring plate.

[0009] Preferably, the locking component includes a ring and elastic springs, with a plurality of symmetrically distributed elastic springs fixedly connected to the inner wall of the ring, and bolts threadedly fitted inside the ring and the sleeve.

[0010] Preferably, the elastic element includes a connecting cylinder, a cylindrical shell, a rubber block, a column rod, and a second buffer spring. The connecting cylinder is fixedly connected to the rear end of the sleeve. Bolts are threadedly fitted inside one end of the connecting cylinder and one end of the cylindrical shell. The column rod is fixedly connected to one end of the rubber block. The column rod is slidably disposed inside the cylindrical shell. A second buffer spring is disposed between one end of the rubber block and the inner wall of one end of the cylindrical shell.

[0011] Preferably, a knife handle is slidably placed inside the connecting cylinder, and the rubber block abuts and fits against the outer side of the knife handle.

[0012] Preferably, the elastic spring contacts and abuts against the front end of the tool handle, and the central axis of the ring coincides with the central axis of the tool handle.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, through the locking and elastic components provided above, the robot arm grips the knife handle and slides the knife handle into the connecting cylinder. The knife handle is pressed and moved against the inclined surface of the rubber block. The second buffer spring is in a compressed state, so that the rubber block abuts against the outer side of the knife handle and the elastic spring abuts against the front end of the knife handle. The tool changing mechanism uses the locking and elastic components to slide and lock the knife handle inserted by the robot arm for limiting.

[0015] 2. In this utility model, through the servo motor, drive gear, shaft and pusher as described above, the servo motor starts and drives the drive gear to rotate, which in turn drives the driven gear to rotate, and performs precise rotation adjustment of the locking part and the elastic part. While the robot grips the tool handle, the electric cylinder device drives the cover plate, connecting rod and sleeve to move backward. The first buffer spring is in a compressed state. The rear end of the connecting rod pushes against the tool handle. The servo motor, drive gear and driven gear adjust the position of the locking part and the elastic part, and together with the pusher, pushes the tool handle out, which facilitates the robot's fixed-track tool changing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal component structure of the carrier disk structure and the tool magazine structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the installation cross-sectional structure of the carrier disk structure and the tool magazine structure of this utility model;

[0019] Figure 4 This is a schematic diagram showing the installation position of the locking component and the elastic component of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal component structure of the shaft of this utility model.

[0021] In the diagram: 1. Carrier disc structure; 11. Anchoring disc; 12. Servo motor; 13. Drive gear; 14. Shaft; 141. Ball bearing; 142. Bearing cover; 143. Shaft; 144. Ring plate; 145. Threaded block; 15. Pusher; 151. Electric cylinder device; 152. Cover plate; 153. Connecting rod; 154. Sleeve cover; 155. First buffer spring; 2. Tool magazine structure; 21. Sleeve disc; 22. Driven gear disc; 23. Locking element; 231. Ring; 232. Elastic spring; 24. Elastic element; 241. Connecting cylinder; 242. Cylinder shell; 243. Rubber block; 244. Column; 245. Second buffer spring; 3. Locking cover. Detailed Implementation

[0022] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0023] In the embodiments of the utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the position or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Similarly, words such as "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0024] Furthermore, in the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] An automatic tool changer for a multi-station milling and turning CNC machine tool includes a carrier structure 1, a tool magazine structure 2, and a locking cover 3. The tool magazine structure 2 is located at the rear end of the carrier structure 1, and the locking cover 3 is located at the rear end of the tool magazine structure 2. The carrier structure 1 includes an anchor plate 11, a servo motor 12, a drive gear 13, a shaft 14, and a pusher 15. The servo motor 12 is fixedly connected to the front right side of the anchor plate 11, and the drive gear 13 is fixedly connected to the end of the spindle of the servo motor 12. The shaft 14 is located inside the anchor plate 11, and the pusher 15 is located at the front left side of the anchor plate 11. The tool magazine structure 2 includes a sleeve plate 21, a driven gear plate 22, a locking element 23, and an elastic element 24. The driven gear plate 22 is fixedly connected to the outside of the sleeve plate 21, and the driven gear plate 22 is meshed with the drive gear 13. The locking element 23 is located inside the front end of the sleeve plate 21, and the elastic element 24 is located at the rear end of the sleeve plate 21.

[0027] Shaft 14 includes a ball bearing 141, a bearing cap 142, a shaft 143, an annular plate 144, and a threaded block 145. The ball bearing 141 is placed inside the anchoring disc 11. The bearing cap 142 is inserted into the outer ring of the ball bearing 141. Bolts are threaded into the bearing cap 142 and one end of the anchoring disc 11. The shaft 143 is mounted on the inner ring of the ball bearing 141 via a key. The annular plate 144 is fixedly connected to the outer side of the shaft 143. The threaded block 145 is fixedly connected to the rear end of the shaft 143. A locking cap 3 is threaded onto the outer side of the threaded block 145. This arrangement forms the assembly of shaft 14. The pusher component 15 includes an electric cylinder device 151, a cover plate 152, a connecting rod 153, a sleeve cover 154, and a first buffer spring 155. The electric cylinder device 151 is fixedly connected to the front end of the anchoring plate 11, and the cover plate 152 is fixedly connected to the output end of the electric cylinder device 151. The connecting rod 153 is fixedly connected to the rear end of the cover plate 152. The connecting rod 153 is slidably disposed inside the anchoring plate 11. The sleeve cover 154 is fixedly connected to the outer side of the connecting rod 153. The first buffer spring 155 is disposed between the inner wall of the rear end of the sleeve cover 154 and the annular plate at the front end of the anchoring plate 11. Through the above arrangement, an integral pusher component 15 is formed. Locking component 23 includes a ring 231 and elastic springs 232. Several symmetrically distributed elastic springs 232 are fixedly connected to the inner wall of the ring 231. Bolts are threaded into the inside of the ring 231 and the sleeve 21. This configuration forms an integral locking component 23. Elastic component 24 includes a connecting cylinder 241, a cylinder shell 242, a rubber block 243, a rod 244, and a second buffer spring 245. The connecting cylinder 241 is fixedly connected to the rear end of the sleeve 21. Bolts are threaded into the inside of one end of the connecting cylinder 241 and one end of the cylinder shell 242. The rod 244 is fixedly connected to one end of the rubber block 243. 244 is slidably disposed inside the cylindrical shell 242. A second buffer spring 245 is disposed between one end of the rubber block 243 and the inner wall of one end of the cylindrical shell 242. Through the above arrangement, an assembled elastic element 24 is formed. The knife handle is slidably placed inside the connecting cylinder 241. The rubber block 243 abuts against the outer side of the knife handle. Through the above arrangement, the rubber block 243 flexibly clamps the knife handle laterally through the second buffer spring 245. The elastic spring 232 abuts against the front end of the knife handle. The central axis of the ring 231 coincides with the central axis of the knife handle. Through the above arrangement, it is convenient for the knife handle to abut against the elastic spring 232 inside the ring 231.

[0028] Workflow: This utility model provides an automatic tool changer mechanism for a multi-station milling and turning composite CNC machine tool. The servo motor 12 and electric cylinder device 151 in the main body of the mechanism are controlled by an external PLC controller and powered by an external power supply. The anchoring plate 11 is locked and positioned by a machine tool fixture. A ball bearing 141 is placed inside the anchoring plate 11, and a bearing cover 142 is inserted inside the outer ring of the ball bearing 141. The anchoring disc 11 has bolts threaded inside one end, the inner ring of the ball bearing 141 is mounted with a shaft 143 via a key block, the inner ring 231 and the inner sleeve 21 are threaded with bolts, the inner end of the connecting cylinder 241 and the inner end of the cylinder shell 242 are threaded with bolts, the threaded block 145 is threaded with a locking cover 3, and the servo motor 12 has precise rotation control, which will not be described in detail here. The servo motor 12 starts and drives the drive gear 13 to rotate, which in turn drives the driven gear disc 22 to rotate, thus adjusting the position of the locking element 23 and the elastic element 24. After precise rotation adjustment, the robotic arm grips the knife handle and slides it into the connecting cylinder 241. The knife handle is pressed and moved against the inclined surface of the rubber block 243, and the second buffer spring 245 is compressed, causing the rubber block 243 to abut against the outer side of the knife handle. The elastic spring 232 abuts against the front end of the knife handle. Under normal conditions, the rear end of the connecting rod 153 is located 20-30mm in front of the central axis of the ring 231. When it is necessary to change or pick up the knife, the robotic arm grips the knife handle, and at the same time, the electric cylinder device 151 drives the cover plate 15. 2. The connecting rod 153 and the cover 154 move backward, the first buffer spring 155 is in a compressed state, and the rear end of the connecting rod 153 pushes against the tool holder. The tool magazine structure 2 mentioned above uses the locking member 23 and the elastic member 24 to slide and lock the tool holder inserted by the robot arm. The position of the locking member 23 and the elastic member 24 is adjusted by the servo motor 12, the drive gear 13 and the driven gear 22. The tool holder is pushed out in conjunction with the pusher 15, which facilitates the fixed-track tool changing of the robot arm.

[0029] Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic tool changer for a multi-station milling and turning composite CNC machine tool, comprising a carrier structure (1), a tool magazine structure (2), and a locking cover (3), characterized in that: The rear end of the carrier structure (1) is provided with a tool magazine structure (2), and the rear end of the tool magazine structure (2) is provided with a locking cover (3). The carrier structure (1) includes an anchoring plate (11), a servo motor (12), a drive gear (13), a shaft (14), and a pusher (15). The servo motor (12) is fixedly connected to the front right side of the anchoring plate (11), and the drive gear (13) is fixedly connected to the end of the spindle of the servo motor (12). The shaft is provided inside the anchoring plate (11). The anchoring disc (11) has a pusher (15) at the left front end. The tool magazine structure (2) includes a sleeve disc (21), a driven gear disc (22), a locking element (23), and an elastic element (24). The driven gear disc (22) is fixedly connected to the outside of the sleeve disc (21). The driven gear disc (22) is meshed with the driving gear (13). The locking element (23) is provided inside the front end of the sleeve disc (21). The elastic element (24) is provided at the rear end of the sleeve disc (21).

2. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 1, characterized in that: The shaft (14) includes a ball bearing (141), a bearing cover (142), a shaft (143), a ring (144), and a threaded block (145). The ball bearing (141) is placed inside the anchoring disc (11). The bearing cover (142) is inserted inside the outer ring of the ball bearing (141). Bolts are threaded inside the bearing cover (142) and one end of the anchoring disc (11). The shaft (143) is mounted on the inner ring of the ball bearing (141) via a key block. The ring (144) is fixedly connected to the outer side of the shaft (143). The threaded block (145) is fixedly connected to the rear end of the shaft (143). A locking cover (3) is threaded on the outer side of the threaded block (145).

3. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 1, characterized in that: The pusher component (15) includes an electric cylinder device (151), a cover plate (152), a connecting rod (153), a sleeve cover (154), and a first buffer spring (155). The front end of the anchoring plate (11) is fixedly connected to the electric cylinder device (151), the output end of the electric cylinder device (151) is fixedly connected to the cover plate (152), the rear end of the cover plate (152) is fixedly connected to the connecting rod (153), the connecting rod (153) is slidably disposed inside the anchoring plate (11), the outer side of the connecting rod (153) is fixedly connected to the sleeve cover (154), and a first buffer spring (155) is disposed between the inner wall of the rear end of the sleeve cover (154) and the front end ring plate of the anchoring plate (11).

4. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 1, characterized in that: The locking component (23) includes a ring (231) and elastic springs (232). Several elastic springs (232) are fixedly connected to the inner wall of the ring (231) and are symmetrically distributed. Bolts are threaded inside the ring (231) and inside the sleeve (21).

5. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 1, characterized in that: The elastic element (24) includes a connecting cylinder (241), a cylindrical shell (242), a rubber block (243), a column rod (244), and a second buffer spring (245). The connecting cylinder (241) is fixedly connected to the rear end of the sleeve (21). Bolts are threaded inside one end of the connecting cylinder (241) and one end of the cylindrical shell (242). The column rod (244) is fixedly connected to one end of the rubber block (243). The column rod (244) is slidably disposed inside the cylindrical shell (242). A second buffer spring (245) is disposed between one end of the rubber block (243) and the inner wall of one end of the cylindrical shell (242).

6. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 5, characterized in that: The connecting cylinder (241) has a knife handle slidably placed inside, and the rubber block (243) is in contact with and fits against the outside of the knife handle.

7. The automatic tool changer for a multi-station milling and turning composite CNC machine tool according to claim 4, characterized in that: The elastic spring (232) abuts against the front end of the handle, and the central axis of the ring (231) coincides with the central axis of the handle.

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