Cutter replacing device of numerical control machine tool

Abstract

The utility model relates to a numerical control machine tool cutter replacing device which comprises a working table, a liftable supporting table is arranged on the working table in a sliding mode, and a cutter replacing device body is arranged on the supporting table. The tool replacing device comprises an electric sliding table arranged on the supporting table in a sliding mode, a fixing base is arranged on the side portion of the electric sliding table, a tool apron is arranged on the fixing base in a penetrating mode and connected with the fixing base in a rotating and clamping mode, a first motor used for driving the tool apron is fixedly arranged on the fixing base through a connecting frame, and a plurality of tool holes are evenly distributed in the circumference of the tool apron. Telescopic cutters are rotationally arranged in the cutter holes, and the cutters in the cutter holes are different; a first hydraulic cylinder is arranged at the top of the electric sliding table, a connecting plate is arranged at the telescopic end of the first hydraulic cylinder and extends to the position above the tool apron, a clamping rod driven by a second motor is arranged at the lower end of the connecting plate, and the clamping rod is used for being clamped to the top of the tool in a matched mode. The tool changing efficiency and the automation level of the machine tool are improved, and the safety risk existing when the tool is manually changed is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machine tool technology, and specifically relates to a CNC machine tool tool changing device. Background Technology

[0002] CNC machine tools are automated machine tools equipped with program control systems. They can effectively solve the problems of machining complex, precise, small-batch, and multi-variety parts. They are flexible and high-efficiency automated machine tools, representing the development direction of modern machine tool control technology, and are a typical mechatronics product.

[0003] When using CNC machine tools, different types of cutting tools need to be selected according to the different parts being processed. Utility model patent with publication number CN211940011U proposes a CNC machine tool that facilitates tool replacement, including a fixed plate, sliding sleeve, plug-in block, plug-in sleeve, lifting push plate, plug-in column, etc. Although it can quickly replace tools and facilitate installation and disassembly, it is still done manually. The old tool must be removed first, and then the new tool must be installed, which is inefficient and poses certain safety hazards. Utility Model Content

[0004] To address the existing technical problems, this utility model proposes a CNC machine tool tool changing device to solve the problems of inconvenient and inefficient tool changing in current machine tools.

[0005] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. A CNC machine tool tool changing device according to this utility model includes a worktable, a liftable support platform slidably mounted on the worktable, and a tool changing device mounted on the support platform. The tool changing device includes an electric slide table slidably mounted on the support platform, a fixed seat on the side of the electric slide table, a tool holder penetrating the fixed seat, and a first motor for driving the tool holder fixed on the fixed seat via a connecting frame. The tool holder has several evenly distributed tool holes around its circumference, and retractable tools are rotatably mounted in each tool hole, with each tool being different. A first hydraulic cylinder is mounted on the top of the electric slide table, and a connecting plate is mounted on the telescopic end of the first hydraulic cylinder. The connecting plate extends above the tool holder, and a second motor-driven locking rod is mounted on its lower end, which engages with the top of the tool.

[0006] Furthermore, a fixing rod with a slot at the top is provided inside the cutter hole, and a cutter is provided at the lower end of the fixing rod. A bearing is provided on the cutter, and the cutter is fixedly connected to the inner ring of the bearing. The outer ring of the bearing is slidably engaged with the inner wall of the cutter hole. A spring is sleeved on the cutter, and a retaining ring is provided on the inner wall of the cutter hole. One end of the spring is fixedly connected to the outer ring of the bearing, and the other end abuts against the retaining ring.

[0007] Furthermore, the inner wall of the cutter hole is provided with a snap-fit ​​groove, and the outer wall of the bearing is provided with a protrusion, which slides within the snap-fit ​​groove.

[0008] Furthermore, the workbench is provided with slide grooves on both sides, and an electric slide block for driving the support platform is slidably installed in the slide grooves.

[0009] Furthermore, a second hydraulic cylinder is provided on the electric slide, and the extension and retraction end of the second hydraulic cylinder is fixedly connected to the support platform.

[0010] Furthermore, the side wall of the tool holder is provided with a boss, and the inner wall of the fixing seat is provided with a groove that matches the boss.

[0011] In summary, this utility model has various types of cutting tools installed inside a rotating tool holder. The cutting tools are retractable and cooperate with a retractable locking rod. When a certain cutting tool is needed, simply control the locking rod to engage with the cutting tool, and the cutting tool can be automatically ejected for processing. This achieves rapid and automatic cutting tool replacement, improves cutting tool replacement efficiency and the automation level of the machine tool, and avoids the safety risks associated with manual cutting tool replacement.

[0012] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a CNC machine tool tool changing device according to the present invention.

[0014] Figure 2 This is a schematic diagram of the tool changing device in this utility model.

[0015] Figure 3 This is a top view of the tool holder.

[0016] Figure 4 for Figure 3 Sectional view at point BB. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0018] Please see Figure 1A CNC machine tool tool changing device includes a worktable 1. The worktable 1 has slide grooves 2 on both sides extending along its length. An electric slide block 3 for driving a support table 5 is slidably disposed in the slide grooves 2. A second hydraulic cylinder 4 is disposed on the electric slide block 3. The telescopic end of the second hydraulic cylinder 4 is fixedly connected to the support table 5. A tool changing device 9 is disposed on the support table 5. The electric slide block 3 and the second hydraulic cylinder 4 cooperate to realize the forward and backward and up and down movement of the tool changing device 9.

[0019] Please see Figure 2 The tool changing device 9 includes an electric slide 6 slidably mounted on the support platform 5 to control the tool changing device 9 to move along the width direction of the worktable 1. The side of the electric slide 6 is provided with a fixed seat 14, and a tool holder 15 is provided through the fixed seat 14. A boss is provided on the outer side wall of the tool holder 15, and a groove matching the boss is provided on the inner wall of the fixed seat 14, so that the tool holder 15 and the fixed seat 14 are rotatably connected and axially limited. A first motor 12 for driving the tool holder 15 to rotate is fixed on the fixed seat 14 through a connecting frame 13. Several tool holes 18 are evenly distributed around the circumference of the tool holder 15. The tool holes 18 penetrate the tool holder 15, and a retractable tool 21 is rotatably provided in the tool holes 18. The tool 21 provided in each tool hole 18 is different. Different types of tools 21 in the tool holes 18 can be numbered for easy replacement.

[0020] The top of the electric slide table 6 is provided with a first hydraulic cylinder 7. The telescopic end of the first hydraulic cylinder 7 is provided with a connecting plate 8. The free end of the connecting plate 8 extends above the tool holder 15, and its lower end is provided with a locking rod 11 driven by a second motor 10. The locking rod 11 is rectangular, corresponds to the tool hole 18, and can be engaged with the top of the tool 21.

[0021] Please see Figure 3 , Figure 4 The tool holder 15 has a tool hole 18 with a fixed rod 16 and a top groove 17 inside. The groove 17 is a rectangular groove that can be engaged with the locking rod 11. The lower end of the fixed rod 16 is equipped with a tool 21. The tool 21 is equipped with a bearing 19. The tool 21 is fixedly connected to the inner ring of the bearing 19. The outer wall of the bearing 19 is equipped with a protrusion 20. The inner wall of the tool hole 18 is equipped with a locking groove. The protrusion 20 is slidably disposed in the locking groove. The tool 21 is fitted with a spring 22. The inner wall of the tool hole 18 is equipped with a retaining ring 23. The retaining ring 23 is located at the bottom of the tool hole 18 (i.e., the end of the tool 21 that protrudes). One end of the spring 22 is fixedly connected to the outer ring of the bearing 19, and the other end abuts against the retaining ring 23.

[0022] In this embodiment, the working process is as follows: In the initial state, the snap-fit ​​rod 11 is separated from the fixing rod 16, and the cutter 21 does not extend out of the cutter hole 18;

[0023] When changing the cutting tool 21, first determine the model of the required cutting tool 21, and then determine its number. Then, control the first motor 12 to drive the tool holder 15 to rotate. Stop when the cutting tool 21 with the corresponding number and the corresponding cutting hole 18 on the tool holder 15 rotate directly below the connecting plate 8. (The angle of rotation can be determined according to the number of cutting holes 18. For example, in this embodiment, the number is 6. Whenever the tool holder 15 rotates 60°, the cutting hole 18 is directly below the connecting plate 8; alternatively, the connecting plate...) A positioning sensor is installed at the tool hole 18 or the tool hole 18 to ensure the accuracy of the tool holder 15 when it rotates. At this time, the slot 17 is aligned with the clamping rod 11. Then, the first hydraulic cylinder 7 is extended to drive the clamping rod 11 down until it is inserted into the slot 17. Then the clamping rod 11 continues to descend, pressing the fixing rod 16 and the tool 21 in sequence to slide in the tool hole 18. At the same time, the spring 22 contracts to push the tool 21 out of the tool hole 18. The tool 21 is replaced. Then the second motor 10 can be started to drive the tool 21 to rotate and process the workpiece.

[0024] When the cutting tool 21 is separated, the second motor 10 stops, the first hydraulic cylinder 7 retracts, the locking rod 11 is pulled out of the locking groove 17, the spring 22 extends and resets, driving the cutting tool 21 and the fixing rod 16 to reset.

[0025] When it is necessary to replace other cutting tools 21, repeat the above steps;

[0026] Furthermore, when the second motor 10 stops, try to ensure that the angle of the locking rod 11 is consistent with that of each locking slot 17. This eliminates the need to manually reset the angle of the locking slot 17 or adjust the angle of the locking rod 11, making it easier to connect quickly.

[0027] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A tool changing device for a CNC machine tool, comprising a worktable (1), characterized in that: The workbench (1) is equipped with a liftable support platform (5), and the support platform (5) is equipped with a tool changing device (9). The tool changing device (9) includes an electric slide (6) that is slidably mounted on a support platform (5). A fixed seat (14) is provided on the side of the electric slide (6). A tool holder (15) is provided through the fixed seat (14). The tool holder (15) and the fixed seat (14) are rotatably engaged. A first motor (12) for driving the tool holder (15) is fixed on the fixed seat (14) through a connecting frame (13). Several tool holes (18) are evenly distributed around the circumference of the tool holder (15). A retractable tool (21) is rotatably mounted in the tool hole (18), and the tool (21) in each tool hole (18) is different. The electric slide (6) is provided with a first hydraulic cylinder (7) at its top. The telescopic end of the first hydraulic cylinder (7) is provided with a connecting plate (8). The connecting plate (8) extends above the tool holder (15) and its lower end is provided with a locking rod (11) driven by a second motor (10). The locking rod (11) is used to engage with the top of the tool (21).

2. The CNC machine tool tool changing device according to claim 1, characterized in that: A fixing rod (16) with a top groove (17) is provided in the cutter hole (18). A cutting tool (21) is provided at the lower end of the fixing rod (16). A bearing (19) is provided on the cutting tool (21). The cutting tool (21) is fixedly connected to the inner ring of the bearing (19). The outer ring of the bearing (19) is slidably engaged with the inner wall of the cutter hole (18). A spring (22) is sleeved on the cutting tool (21). A retaining ring (23) is provided on the inner wall of the cutter hole (18). One end of the spring (22) is fixedly connected to the outer ring of the bearing (19), and the other end abuts against the retaining ring (23).

3. The CNC machine tool tool changing device according to claim 2, characterized in that: The inner wall of the cutter hole (18) is provided with a snap-fit ​​groove, and the outer wall of the bearing (19) is provided with a protrusion (20), which is slidably disposed in the snap-fit ​​groove.

4. The CNC machine tool tool changing device according to claim 1, characterized in that: The workbench (1) has slide grooves (2) on both sides, and an electric slide block (3) for driving the support table (5) is slidably installed in the slide grooves (2).

5. A CNC machine tool tool changing device according to claim 4, characterized in that: The electric slide (3) is equipped with a second hydraulic cylinder (4), and the telescopic end of the second hydraulic cylinder (4) is fixedly connected to the support platform (5).

6. A CNC machine tool tool changing device according to claim 1, characterized in that: The side wall of the tool holder (15) is provided with a boss, and the inner wall of the fixing seat (14) is provided with a groove that matches the boss.

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