Quick tool changing device of numerical control machine tool

Abstract

The utility model relates to the technical field of tool changing devices, in particular to a quick tool changing device of a numerically-controlled machine tool, which comprises a numerically-controlled machine tool body and a tool seat component, a first hydraulic telescopic component, a metal pipeline and a second hydraulic telescopic component are fixedly connected to the inner side of the tool seat component, and a tool component is mounted on the inner side of the tool seat component. The first hydraulic telescopic assembly comprises an oil storage shell, a communicating oil hole is formed in the upper end of the oil storage shell, an oil storage groove is formed in the inner side of the oil storage shell, a linear spring is fixedly connected to the inner side of the oil storage groove, the lower end of the linear spring is fixedly connected with a double-column rod, and the outer side of the double-column rod is fixedly connected with a rubber sealing ring. The bottom end of the rod fixing plate is fixedly connected with a spring telescopic rod, the bottom end of the spring telescopic rod is fixedly connected with a mounting seat, and the lower end of the mounting seat is provided with an anti-deviation hole. According to the device, the stability and the reliability of a cutter after replacement are improved, the machining quality is guaranteed, the efficiency and the precision are improved, the risk is reduced, and the practicability is high.

Description

A quick tool changer for CNC machine tools Technical Field

[0001] This utility model relates to the technical field of tool changing devices, specifically a rapid tool changing device for CNC machine tools. Background Technology

[0002] A quick tool changer for CNC machine tools is a device installed on CNC machine tools to achieve rapid tool changing. Through a specific mechanical structure and control system, it can complete the loading, unloading and switching of tools in a very short time, thereby greatly shortening non-machining time, improving the production efficiency of CNC machine tools, and enabling machine tools to complete a variety of complex machining tasks more efficiently.

[0003] There are indeed existing CNC machine tool tool changing systems that use air pressure to achieve rapid tool changing. These pneumatic tool changing systems use compressed air as a power source and achieve rapid tool changing through pneumatic components.

[0004] In pneumatic tool changing systems, the stability of air pressure is a key factor in ensuring the reliability of tool changing. Pneumatic tool changing systems rely on stable air pressure to drive cylinders and other actuators to complete tool changing actions. If the air pressure is insufficient or unstable, it will cause a series of problems, such as the tool not being clamped tightly, causing the tool to loosen during the machining process, which will affect the machining accuracy and even damage the tool and the workpiece. Therefore, a rapid tool changing device for CNC machine tools is proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a quick tool changer for CNC machine tools to solve the problem that in pneumatic tool changer systems, insufficient or unstable air pressure can cause the tool to loosen during machining, thereby affecting machining accuracy and even damaging the tool and workpiece.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick tool changer for a CNC machine tool includes a CNC machine tool body and a tool holder assembly. A first hydraulic telescopic assembly, a metal pipe, and a second hydraulic telescopic assembly are fixedly connected to the inner side of the tool holder assembly. A tool assembly is installed inside the tool holder assembly. The first hydraulic telescopic assembly includes an oil reservoir with a communicating oil hole at its upper end and an oil reservoir groove inside the oil reservoir. A linear spring is fixedly connected to the inner side of the oil reservoir groove, and a double-column rod is fixedly connected to the lower end of the linear spring. A rubber sealing ring is fixedly connected to the outer side of the double-column rod. The tool assembly includes a fixing plate with a spring telescopic rod fixedly connected to its bottom end. A mounting base is fixedly connected to the bottom end of the spring telescopic rod, and an anti-deviation hole is provided at the lower end of the mounting base. The mounting base is magnetically attracted to a permanent magnet plug. A tool body is fixedly connected to the bottom end of the permanent magnet plug, and a fixing insertion hole is provided inside the tool body.

[0008] As a further optimization of this utility model, the tool holder assembly includes a tool holder housing, a hydraulic telescopic rod is fixedly connected to the inner side of the tool holder housing, a movable channel is opened on the inner side of the tool holder housing, a fixed opening is opened on the inner side of the tool holder housing, an extension cylinder is fixedly connected to the bottom end of the tool holder housing, and rail grooves are opened at both the front and rear ends of the extension cylinder.

[0009] As a further optimization of this utility model, the tool holder housing is fixedly connected to the drive shaft of the CNC machine tool body, the tool holder housing has an installation hole on its inner side near the hydraulic telescopic rod, and the bottom end of the hydraulic telescopic rod is fixedly connected to the top end of the fixed rod plate.

[0010] As a further optimization of this utility model, the following features are provided: the bottom end of the first hydraulic telescopic component is spaced apart from the top end of the fixed rod plate; the top end of the oil storage shell is fixedly connected to the inner side of the tool holder shell; and the inner side of the metal pipe is a hollow structure.

[0011] As a further optimization of this utility model, the oil storage tank is connected to the inside of a metal pipe through a connecting oil hole, the metal pipe is connected to the inside of a second hydraulic telescopic assembly, the structure of the second hydraulic telescopic assembly is the same as that of the first hydraulic telescopic assembly, and the double-column rods of the second hydraulic telescopic assembly are inserted into the inside of the fixed insertion hole.

[0012] As a further optimization of this utility model, the rail groove extends through the lower end of the extension cylinder, and the front and rear ends of the mounting base are fixedly connected to limit sliders, with the limit sliders of the mounting base sliding inside the rail groove.

[0013] As a further optimization of this utility model, the anti-deviation hole penetrates the lower end of the mounting base, the top end of the tool body is attached to the bottom end of the mounting base, the left and right ends of the permanent magnet insert are both fixed with guide blocks, and the tool body extends out of the lower end of the extension cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, by setting up a first hydraulic telescopic component, a second hydraulic telescopic component, and a tool component, the device effectively avoids a series of problems caused by insufficient or unstable air pressure, such as tool misclamping and tool loosening during processing. This significantly improves the stability and reliability of tool changing, ensuring that each tool change is completed firmly and accurately. This provides a solid quality guarantee for subsequent processing steps, enabling CNC machine tools to complete various complex processing tasks more efficiently and stably. It greatly improves the production efficiency and processing accuracy of CNC machine tools, reduces the risk of processing errors and equipment damage caused by unstable tool changing, and has significant practicality and innovation. Attached Figure Description

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

[0017] Figure 2 is a schematic diagram of the metal pipe structure of this utility model;

[0018] Figure 3 is a cross-sectional structural diagram of the tool holder assembly of this utility model;

[0019] Figure 4 is a schematic diagram of the tool holder housing structure of this utility model;

[0020] Figure 5 is a schematic diagram of the structure at point A in Figure 4 of this utility model;

[0021] Figure 6 is a cross-sectional structural diagram of the cutting tool assembly of this utility model;

[0022] Figure 7 is a schematic diagram of the cutter body structure of this utility model;

[0023] Figure 8 is a cross-sectional structural diagram of the first hydraulic telescopic component of this utility model.

[0024] In the diagram: 1. CNC machine tool body;

[0025] 2. Tool holder assembly; 21. Tool holder housing; 22. Hydraulic telescopic rod; 23. Moving track; 24. Fixing port; 25. Extension cylinder; 26. Rail groove;

[0026] 3. First hydraulic telescopic assembly; 31. Oil reservoir; 32. Connecting oil hole; 33. Oil reservoir; 34. Linear spring; 35. Double column; 36. Rubber sealing ring;

[0027] 4. Metal pipes; 5. Second hydraulic telescopic assembly;

[0028] 6. Tool assembly; 61. Fixing plate; 62. Spring telescopic rod; 63. Mounting base; 64. Anti-deviation hole; 65. Permanent magnet insert; 66. Tool body; 67. Fixing socket. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Please refer to Figures 1-8. This utility model provides a technical solution:

[0032] A quick tool changer for a CNC machine tool includes a CNC machine tool body 1 and a tool holder assembly 2. A first hydraulic telescopic assembly 3, a metal pipe 4, and a second hydraulic telescopic assembly 5 are fixedly connected to the inner side of the tool holder assembly 2. A tool assembly 6 is installed inside the tool holder assembly 2. The first hydraulic telescopic assembly 3 includes an oil reservoir 31 with a connecting oil hole 32 at its upper end and an oil reservoir 33 inside. A linear spring 34 is fixedly connected to the inner side of the oil reservoir 33, and a double-column rod 35 is fixedly connected to the lower end of the linear spring 34. A rubber sealing ring 36 is fixedly connected to the outer side of the double-column rod 35. The tool assembly 6 includes a fixing plate 61 with a spring telescopic rod 62 fixedly connected to its bottom end. A mounting base 63 is fixedly connected to the bottom end of the spring telescopic rod 62, and an anti-deviation hole 64 is provided at the lower end of the mounting base 63. The mounting base 63 is magnetically attracted to a permanent magnet plug 65, and a tool body 66 is fixedly connected to the bottom end of the permanent magnet plug 65. A fixing insertion hole 67 is provided inside the tool body 66.

[0033] As a further implementation of this solution, the tool holder assembly 2 includes a tool holder housing 21, a hydraulic telescopic rod 22 fixedly connected to the inner side of the tool holder housing 21, an active channel 23 and a fixed opening 24 on the inner side of the tool holder housing 21, an extension cylinder 25 fixedly connected to the bottom end of the tool holder housing 21, and rail grooves 26 on both the front and rear ends of the extension cylinder 25. The top end of the tool holder housing 21 is fixedly connected to the drive shaft of the CNC machine tool body 1. An installation hole is opened on the inner side of the tool holder housing 21 near the hydraulic telescopic rod 22. The bottom end of the hydraulic telescopic rod 22 is fixedly connected to the top end of the fixed rod plate 61. Through the above settings, not only is the power for the movement of the tool assembly 6 provided, but it also plays a guiding role when the tool assembly 6 moves. The fixed rod plate 61 is pressed against the double column rod 35 by the drive of the hydraulic telescopic rod 22, thereby causing the hydraulic oil inside the first hydraulic telescopic assembly 3 to flow.

[0034] As a further implementation of this solution, the bottom end of the first hydraulic telescopic component 3 is spaced from the top end of the fixed rod plate 61, the top end of the oil reservoir 31 is fixedly connected to the inner side of the tool holder housing 21, and the inner side of the metal pipe 4 is a hollow structure. Through the above settings, the spaced setting can prevent hydraulic oil from flowing when the anti-deviation hole 64 and the tool body 66 move, thereby preventing the second hydraulic telescopic component 5 from extending.

[0035] As a further implementation of this solution, the oil reservoir 33 is connected to the inside of the metal pipe 4 through the connecting oil hole 32. The metal pipe 4 is connected to the inside of the second hydraulic telescopic assembly 5. The structure of the second hydraulic telescopic assembly 5 is the same as that of the first hydraulic telescopic assembly 3. The double column rod 35 of the second hydraulic telescopic assembly 5 is inserted into the inside of the fixed insertion hole 67. Through the above settings, the second hydraulic telescopic assembly 5 can fix the tool body 66 by hydraulic drive, which effectively avoids the problem of unstable tool fixation caused by unstable air pressure in the traditional pneumatic tool changing method, significantly improves the stability of tool changing, and thus ensures the stability and consistency of processing quality, and improves the processing efficiency and service life of CNC machine tools.

[0036] As a further implementation of this solution, the rail groove 26 penetrates the lower end of the extension cylinder 25, and the front and rear ends of the mounting base 63 are fixedly connected to limit sliders. The limit sliders of the mounting base 63 slide inside the rail groove 26. Through the above settings, the device can realize the rapid and accurate replacement of tools, which greatly improves the production efficiency and machining accuracy of CNC machine tools and reduces the risk of machining errors and equipment damage caused by unstable tool replacement.

[0037] As a further implementation of this solution, the anti-deviation hole 64 penetrates the lower end of the mounting base 63, the top of the tool body 66 is attached to the bottom of the mounting base 63, the left and right ends of the permanent magnet insert 65 are fixed with guide blocks, and the tool body 66 extends out of the lower end of the extension cylinder 25. Through the above settings, not only is the guiding performance of the tool enhanced, but the stability of the tool in the device is also improved, so that the tool can always maintain the correct posture during the replacement process, avoiding tool replacement failure or machining error caused by tool shaking or deviation.

[0038] Workflow: To achieve rapid installation of the tool body 66, align the permanent magnet insert 65 with the anti-deviation hole 64 and insert the permanent magnet insert 65 into the anti-deviation hole 64. At this time, the permanent magnet insert 65 and the mounting base 63 are magnetically attracted, causing the top of the tool body 66 to fit against the bottom of the mounting base 63. This temporarily limits the position of the tool body 66. Activate the hydraulic telescopic rod 22 to move the fixing plate 61 upward. The fixing plate 61 then moves the spring telescopic rod 62, the anti-deviation hole 64, and the tool body 66 upward simultaneously. The mounting base 63 slides inside the rail groove 26 via the limiting slider. When the top of the limiting slider of the mounting base 63 fits against the top of the rail groove 26, the anti-deviation hole 64 stops. As the device moves, the top of the fixing plate 61 will contact the bottom of the double-column rod 35. When the fixing plate 61 moves upward, the spring telescopic rod 62 extends. Under the elastic tension of the spring telescopic rod 62, the mounting base 63 is kept in an upward moving force. The oil reservoir 33, the metal pipe 4, and the second hydraulic telescopic assembly 5 are all filled with hydraulic oil. Before this, the double-column rod 35 of the second hydraulic telescopic assembly 5 is housed inside the second hydraulic telescopic assembly 5. The double-column rod 35 protrudes outside the oil reservoir 31. The linear spring 34 inside the first hydraulic telescopic assembly 3 remains elastically extended, and the linear spring 34 inside the second hydraulic telescopic assembly 5 remains elastically contracted. When the fixing plate 61 presses against the double-column rod 35, the double-column rod 35 presses against the linear spring 34, causing the linear spring 34 to deform. Simultaneously, the rubber sealing ring 36 prevents the hydraulic oil inside the oil reservoir 33 from leaking out. At this time, the hydraulic oil enters the interior of the second hydraulic telescopic assembly 5 through the connecting oil hole 32 and the metal pipe 4. The double-column rod 35 inside the second hydraulic telescopic assembly 5 moves outward under the thrust of the hydraulic oil, thus inserting into the fixing hole 67, thereby completing the fixation of the tool body 66. If it is necessary to disassemble the tool body 66, start the hydraulic... The telescopic rod 22 drives the fixed rod plate 61 to move backward until the fixed rod plate 61 is far away from the double column rod 35 of the first hydraulic telescopic component 3. At this time, under the elastic force of the linear spring 34 of the first hydraulic telescopic component 3 and the return action of the linear spring 34 of the second hydraulic telescopic component 5, the double column rod 35 of the second hydraulic telescopic component 5 is retracted into the interior of the second hydraulic telescopic component 5, completing the disassembly of the tool body 66. Based on the above principles, when changing tools on CNC machine tools, the device avoids the unstable tool fixation caused by unstable air pressure in traditional pneumatic tool changing methods. This tool changing method can ensure the stability of tool fixation each time, thereby ensuring the quality of subsequent processing.

[0039] Although embodiments of the present invention 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid tool changer for a CNC machine tool, comprising a CNC machine tool body (1) and a tool holder assembly (2), characterized in that: The tool holder assembly (2) is fixedly connected to a first hydraulic telescopic assembly (3), a metal pipe (4), and a second hydraulic telescopic assembly (5). A tool assembly (6) is installed inside the tool holder assembly (2). The first hydraulic telescopic assembly (3) includes an oil reservoir (31). The upper end of the oil reservoir (31) is provided with a communicating oil hole (32). The inner side of the oil reservoir (31) is provided with an oil reservoir (33). A linear spring (34) is fixedly connected inside the oil reservoir (33). A double column rod (35) is fixedly connected to the lower end of the linear spring (34). A rubber sealing ring (36) is fixedly connected to the outside of the double column rod (35); the tool assembly (6) includes a fixed rod plate (61), a spring telescopic rod (62) is fixedly connected to the bottom end of the fixed rod plate (61), a mounting base (63) is fixedly connected to the bottom end of the spring telescopic rod (62), an anti-deviation hole (64) is opened at the lower end of the mounting base (63), the mounting base (63) is magnetically attracted to the permanent magnet plug (65), a tool body (66) is fixedly connected to the bottom end of the permanent magnet plug (65), and a fixing insertion hole (67) is opened on the inner side of the tool body (66).

2. The CNC machine tool quick tool changer according to claim 1, characterized in that: The tool holder assembly (2) includes a tool holder housing (21), a hydraulic telescopic rod (22) is fixedly connected to the inner side of the tool holder housing (21), an active channel (23) is opened on the inner side of the tool holder housing (21), a fixing port (24) is opened on the inner side of the tool holder housing (21), an extension cylinder (25) is fixedly connected to the bottom end of the tool holder housing (21), and a rail groove (26) is opened at both the front and rear ends of the extension cylinder (25).

3. The CNC machine tool quick tool changer according to claim 2, characterized in that: The top of the tool holder housing (21) is fixedly connected to the drive shaft of the CNC machine tool body (1). The tool holder housing (21) has an installation hole on the inner side near the hydraulic telescopic rod (22). The bottom end of the hydraulic telescopic rod (22) is fixedly connected to the top of the rod plate (61).

4. The CNC machine tool quick tool changer according to claim 1, characterized in that: The bottom of the first hydraulic telescopic component (3) is spaced from the top of the fixed rod plate (61), the top of the oil storage shell (31) is fixedly connected to the inner side of the tool holder shell (21), and the inner side of the metal pipe (4) is a hollow structure.

5. A rapid tool changer for a CNC machine tool according to claim 1, characterized in that: The oil storage tank (33) is connected to the inside of the metal pipe (4) through the connecting oil hole (32). The metal pipe (4) is connected to the inside of the second hydraulic telescopic assembly (5). The structure of the second hydraulic telescopic assembly (5) is the same as that of the first hydraulic telescopic assembly (3). The double column (35) of the second hydraulic telescopic assembly (5) is inserted into the inside of the fixed insertion hole (67).

6. A rapid tool changer for a CNC machine tool according to claim 2, characterized in that: The rail groove (26) passes through the lower end of the extension cylinder (25), and the front and rear ends of the mounting base (63) are fixedly connected to limit sliders. The limit sliders of the mounting base (63) slide inside the rail groove (26).

7. A rapid tool changer for a CNC machine tool according to claim 1, characterized in that: The anti-deviation hole (64) penetrates the lower end of the mounting base (63), the top end of the tool body (66) is attached to the bottom end of the mounting base (63), the left and right ends of the permanent magnet plug (65) are fixed with guide blocks, and the tool body (66) extends out of the lower end of the extension tube (25).

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