A high-precision tool clamping device of a numerical control lathe

Abstract

The utility model relates to high accuracy cutter clamping device technical field of numerical control lathe, especially a kind of high accuracy cutter clamping device of numerical control lathe, including fixed frame, clamping assembly and cutter body, the bottom end surface of fixed frame is excavated and is equipped with limit slot, and the inner chamber of fixed frame is provided with clamping assembly, and fixed frame is connected with cutter body by clamping assembly and limit slot limit, clamping assembly includes protective cover and first ring type electromagnet, the inner side of limit slot is arranged to protective cover, and protective cover and limit slot are same in shape. First, cutter body is connected by limit slot and fixed frame snap-fit, and utilize clamping assembly to be fixed limit to cutter body, to guarantee the stability of being fixed to cutter, wherein cutter body is fixed limit by the mode of magnetic fixed connection and piezoelectric ceramic electrostrictive column and fixed slot fixed connection, guarantee fixed stability.

Description

Technical Field

[0001] This utility model relates to the field of tool clamping technology, and in particular to a high-precision tool clamping device for CNC lathes. Background Technology

[0002] The high-precision tool clamping device of CNC lathe is a key component that achieves micron-level positioning and stable locking of the tool through a special structure and power system. Its core design aims to eliminate vibration, ensure repeatability, and meet the needs of high-efficiency machining.

[0003] For example, application number CN202120549380.X discloses a tool clamping device that can keep the tool stable, avoid machining errors, prevent tool damage from collisions, and achieve high-precision machining;

[0004] The aforementioned device solves the problem that "most existing clamping devices use the rotational compression between the sleeve and the fixing part to clamp the tool, but such clamping devices have a complex structure, are not easy to install, and may cause the tool to fall and cause safety accidents. In addition, current clamping devices have poor shock resistance, are easy to bump the tool head, and are difficult to achieve high precision due to tool vibration." However, in the existing technology, disc springs can cause the tool to fail to reach the predetermined clamping position. Especially after long-term high-frequency use, spring fatigue will reduce the stability of the clamping force, and the spring collet is easy to be damaged. The collet is prone to wear or breakage due to repeated elastic deformation, resulting in a decrease in clamping force or even tool fall off. The clamping effect is unstable when using a single mechanical component. Utility Model Content

[0005] The main purpose of this utility model is to provide a high-precision tool clamping device for CNC lathes, aiming to solve the technical problems in the prior art.

[0006] This utility model proposes a high-precision tool clamping device for CNC lathes, including a fixed frame, a clamping assembly and a tool body: the bottom end face of the fixed frame is provided with a limiting groove, and the inner cavity of the fixed frame is provided with a clamping assembly, and the fixed frame is connected to the tool body through the clamping assembly and the limiting groove.

[0007] The clamping assembly includes a protective cover and a first annular electromagnet. The protective cover is arranged close to the inner side of the limiting groove, and the protective cover has the same shape as the limiting groove. Several sets of first annular electromagnets are arranged on the side of the protective cover away from the limiting groove, and the diameter of the first annular electromagnets gradually decreases from bottom to top. The first annular electromagnets are arranged close to the protective cover. A piezoelectric ceramic electrostrictive column is arranged on the inner side wall of the limiting groove, and a first conductive column is arranged below the piezoelectric ceramic electrostrictive column.

[0008] Preferably, the tool body includes a fixing plate and a limiting plate. The upper end face of the fixing plate is provided with a limiting plate, and a tool head is provided on the side of the fixing plate away from the limiting plate. The side of the limiting plate away from the fixing plate is provided with a limiting plug. A second annular electromagnet is provided inside the limiting plug, and the diameter of the second annular electromagnet gradually decreases from bottom to top. A fixing groove is provided on the side end face of the limiting plate, and a second conductive post is provided below the fixing groove.

[0009] Preferably, the limiting plate and limiting plug in the tool body have the same shape as the limiting groove, and the tool body forms an insertion connection structure with the limiting groove through the limiting plate and limiting plug.

[0010] Preferably, the magnetic field generated by the first ring electromagnet is opposite to that generated by the second ring electromagnet, and the first ring electromagnet and the second ring electromagnet attract each other.

[0011] Preferably, the cross-section of the piezoelectric ceramic electrostrictive column is the same as the cross-section of the fixing groove, and the piezoelectric ceramic electrostrictive column and the fixing groove form an engaging structure. The piezoelectric ceramic electrostrictive column and the fixing groove are evenly arranged around the center of the limiting groove and the center of the fixing plate, respectively.

[0012] Preferably, the first conductive post and the second conductive post are evenly arranged around the center of the limiting groove and the center of the fixing plate, respectively, and the first conductive post and the second conductive post are in contact to form an electrical connection.

[0013] Preferably, a PLC controller is provided on the inner side of the fixing frame, and a magnetic controller is provided on one side of the PLC controller. The PLC controller and the magnetic controller are electrically connected to the first annular electromagnet and the first conductive post.

[0014] Preferably, the piezoelectric ceramic electrostrictive column is electrically connected to the PLC controller and the magnetic controller, and the second annular electromagnet is electrically connected to the second conductive column.

[0015] The beneficial effects of this utility model are as follows:

[0016] In use, the device of this application first connects the tool body to the fixing frame through the limiting groove, and then uses the clamping assembly to fix and limit the tool body, thereby ensuring the stability of the tool fixation. The tool body is fixed and limited by magnetic fixing connection and piezoelectric ceramic electrostriction column fixed connection to the fixing groove. While ensuring the stability of fixation, the above structure solves the problem that "in the prior art, disc springs can cause the tool to fail to reach the predetermined clamping position. Especially after long-term high-frequency use, spring fatigue will reduce the stability of clamping force, and the spring collet is easy to be damaged. The collet is prone to wear or breakage due to repeated elastic deformation, resulting in a decrease in clamping force or even tool fall off. The clamping effect is not stable with a single mechanical component."

[0017] In use, the device of this application involves inserting the limiting plug and the limiting plate from the tool body into the inner side of the limiting groove, thereby engaging the tool body with the fixing frame. This facilitates subsequent fixing and limiting of the tool body using the clamping assembly. After the tool body is engaged with the fixing frame, the piezoelectric ceramic electrostrictive column is activated, causing it to extend and retract, thereby engaging the piezoelectric ceramic electrostrictive column with the fixing groove to fix and limit the tool body. Simultaneously, the first conductive column and the second conductive column are in contact, facilitating power transmission. This causes the first and second annular electromagnets to generate magnetic fields, and the magnetic field generated by the first annular electromagnet and the second annular electromagnet... The magnetic fields generated by the ring electromagnets are opposite, so that the first and second ring electromagnets attract each other, thereby achieving magnetic fixation. The tool body is fixed and limited by a combination of magnetic fixation and snap-fit ​​fixation, which helps to maintain the stability of the tool body at all times. The above device solves the problem that "in the prior art, disc springs can cause the tool to fail to reach the predetermined clamping position, especially after long-term high-frequency use, spring fatigue will reduce the stability of clamping force, and the spring collet is prone to damage. The collet is prone to wear or breakage due to repeated elastic deformation, resulting in a decrease in clamping force or even tool fall off. The clamping effect is unstable when using a single mechanical component." Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall orthographic section of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the front section of the fixing frame according to an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the cross-section of the tool body in an embodiment of this utility model.

[0021] Figure 4 This is a top-section structural diagram of the limiting groove in an embodiment of the present invention.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0024] like Figures 1-4As shown, this application provides a high-precision tool clamping device method for CNC lathes, including a fixed frame 1, a clamping assembly 2, and a tool body 3. A PLC controller is disposed inside the fixed frame 1, and a magnetic controller is disposed on one side of the PLC controller. A limiting groove 4 is carved into the bottom end face of the fixed frame 1, and the clamping assembly 2 is disposed in the inner cavity of the fixed frame 1. The tool body 3 is connected to the fixed frame 1 through the clamping assembly 2 and the limiting groove 4. The clamping assembly 2 includes a protective cover 21 and a first annular electromagnet 22. The protective cover 21 is arranged close to the inner side of the limiting groove 4, and the protective cover 21 has the same shape as the limiting groove 4. The tool body 3 is fastened to the fixed frame 1 through the limiting groove 4, and the clamping assembly 2 is used to fix and limit the tool body 3, thus controlling the tool's movement. The protective cover 21 is fixed, and a number of first annular electromagnets 22 are provided on the side away from the limiting groove 4. The diameter of the first annular electromagnets 22 gradually decreases from bottom to top, and the first annular electromagnets 22 are arranged close to the protective cover 21. The inner wall of the limiting groove 4 is provided with piezoelectric ceramic electrostrictive columns 23, and a first conductive column 24 is provided below the piezoelectric ceramic electrostrictive columns 23. The tool body 3 includes a fixing plate 31 and a limiting plate 32. The upper end face of the fixing plate 31 is provided with the limiting plate 32, and the side of the fixing plate 31 away from the limiting plate 32 is provided with a tool head 33. The side of the limiting plate 32 away from the fixing plate 31 is provided with a limiting plug 34. The limiting plate 32 and the limiting plug 34 in the tool body 3 have the same shape as the limiting groove 4. The tool body 3 is connected to the limiting groove 4. The limiting plate 32 and the limiting plug 34 form an insertion connection structure with the limiting groove 4. The limiting plug 34 in the tool body 3 is inserted into the inner side of the limiting groove 4, and the limiting plate 32 is also inserted into the inner side of the limiting groove 4, so that the tool body 3 is fastened to the fixing frame 1, so that the tool body 3 can be fixed and limited by the clamping assembly 2 later. A second ring electromagnet 35 is provided on the inner side of the limiting plug 34. The magnetic field generated by the first ring electromagnet 22 is opposite to the magnetic field generated by the second ring electromagnet 35, and the first ring electromagnet 22 and the second ring electromagnet 35 are attracted to each other. The diameter of the second ring electromagnet 35 gradually decreases from bottom to top. A fixing groove 36 is provided on the side end face of the limiting plate 32, and a second conductive post 37 is provided below the fixing groove 36. Through magnetic... The tool body 3 is fixed and limited by a fixed connection between the piezoelectric ceramic electrostrictive column 23 and the fixed groove 36. The cross-section of the piezoelectric ceramic electrostrictive column 23 is the same as that of the fixed groove 36, and the piezoelectric ceramic electrostrictive column 23 and the fixed groove 36 form a locking structure. The piezoelectric ceramic electrostrictive column 23 and the fixed groove 36 are evenly arranged around the center of the limiting groove 4 and the center of the fixed plate 31, respectively. The first conductive column 24 and the second conductive column 37 are evenly arranged around the center of the limiting groove 4 and the center of the fixed plate 31, respectively, and the first conductive column 24 and the second conductive column 37 are electrically connected in contact. The PLC controller and the magnetic controller are electrically connected to the first annular electromagnet 22 and the first conductive column 24.The piezoelectric ceramic electrostrictive column 23 is electrically connected to the PLC controller and the magnetic controller. The second annular electromagnet 35 is electrically connected to the second conductive column 37. After the tool body 3 is fastened to the fixing frame 1, the piezoelectric ceramic electrostrictive column 23 is activated by the PLC controller and the magnetic controller, causing it to extend and retract. This allows the piezoelectric ceramic electrostrictive column 23 to be limited and connected to the fixing groove 36, thus fixing and limiting the tool body 3. At the same time, the first conductive column 24 and the second conductive column 37 are in contact to facilitate power transmission, causing the first annular electromagnet 22 and the second annular electromagnet 35 to generate opposite magnetic fields. This causes the first annular electromagnet 22 and the second annular electromagnet 35 to attract each other, achieving magnetic fixation. The tool body 3 is fixed and limited through a combined fixing method of magnetic fixation and fastening, maintaining the stability of the tool body 3 at all times. To address the problem that "existing disc springs can cause the tool to fail to reach the predetermined clamping position, especially after long-term high-frequency use, spring fatigue reduces the stability of the clamping force, and the spring collet is prone to damage, with the collet easily wearing down or breaking due to repeated elastic deformation, resulting in decreased clamping force or even tool slippage, and the clamping effect is unstable with a single mechanical component," this embodiment uses commercially available, well-known equipment in the field of those skilled in the art, including the first annular electromagnet 22, piezoelectric ceramic electrostrictive column 23, first conductive column 24, second annular electromagnet 35, second conductive column 37, PLC controller, and magnetic controller. These can be customized or selected according to actual needs. Here, we are simply using them without any structural or functional improvements, and we will not elaborate further.

[0025] The technical principle of this utility model is as follows: When using the device, the limiting plug 34 in the tool body 3 is inserted into the inner side of the limiting groove 4, and the limiting plate 32 is simultaneously inserted into the inner side of the limiting groove 4, so that the tool body 3 is fastened and connected to the fixing frame 1. Then, the clamping assembly 2 is used to fix and limit the tool body 3. The piezoelectric ceramic electrostrictive column 23 is activated to extend and retract, so that the piezoelectric ceramic electrostrictive column 23 is connected to the fixing groove 36 for limiting connection, thereby fixing and limiting the tool body 3. At the same time, the first conductive column 24 and the second conductive column 37 are in contact to transmit power, so that the first annular electromagnet 22 and the second annular electromagnet 35 generate phase. A counter-magnetic field attracts the first ring electromagnet 22 and the second ring electromagnet 35, achieving magnetic fixation. This combined magnetic and snap-fit ​​fixation method secures and limits the tool body 3, ensuring its stability during operation. This device addresses the problem that "existing disc springs can prevent the tool from reaching the intended clamping position, especially after long-term high-frequency use, spring fatigue reduces clamping force stability, and the spring collet is prone to damage. The collet is easily worn or broken due to repeated elastic deformation, resulting in decreased clamping force or even tool detachment. The clamping effect is unstable when using a single mechanical component."

[0026] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0027] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A high-precision tool clamping device for a CNC lathe, characterized in that, Includes a fixed frame (1), a clamping assembly (2) and a tool body (3): the bottom end face of the fixed frame (1) is provided with a limiting groove (4), and the inner cavity of the fixed frame (1) is provided with a clamping assembly (2), and the fixed frame (1) is connected to the tool body (3) through the clamping assembly (2) and the limiting groove (4). The clamping assembly (2) includes a protective cover (21) and a first ring electromagnet (22). The protective cover (21) is arranged close to the inner side of the limiting groove (4), and the protective cover (21) and the limiting groove (4) have the same shape. Several sets of first ring electromagnets (22) are provided on the side of the protective cover (21) away from the limiting groove (4), and the diameter of the first ring electromagnets (22) gradually decreases from bottom to top. The first ring electromagnets (22) are arranged close to the protective cover (21). The inner wall of the limiting groove (4) is provided with a piezoelectric ceramic electrostrictive column (23), and a first conductive column (24) is provided below the piezoelectric ceramic electrostrictive column (23).

2. The high-precision tool clamping device for CNC lathes according to claim 1, characterized in that, The tool body (3) includes a fixing plate (31) and a limiting plate (32). The upper end face of the fixing plate (31) is provided with the limiting plate (32), and the side of the fixing plate (31) away from the limiting plate (32) is provided with a tool head (33). The side of the limiting plate (32) away from the fixing plate (31) is provided with a limiting plug (34). The inner side of the limiting plug (34) is provided with a second ring electromagnet (35), and the diameter of the second ring electromagnet (35) gradually decreases from bottom to top. The side end face of the limiting plate (32) is provided with a fixing groove (36), and the bottom of the fixing groove (36) is provided with a second conductive post (37).

3. The high-precision tool clamping device for CNC lathes according to claim 2, characterized in that, The limiting plate (32) and limiting plug (34) in the tool body (3) have the same shape as the limiting groove (4), and the tool body (3) forms an insertion connection structure with the limiting groove (4) through the limiting plate (32) and limiting plug (34).

4. The high-precision tool clamping device for CNC lathes according to claim 2, characterized in that, The magnetic field generated by the first ring electromagnet (22) is opposite to the magnetic field generated by the second ring electromagnet (35), and the first ring electromagnet (22) and the second ring electromagnet (35) attract each other.

5. The high-precision tool clamping device for CNC lathes according to claim 2, characterized in that, The cross section of the piezoelectric ceramic electrostrictive column (23) is the same as the cross section of the fixing groove (36), and the piezoelectric ceramic electrostrictive column (23) and the fixing groove (36) form a locking structure. The piezoelectric ceramic electrostrictive column (23) and the fixing groove (36) are evenly arranged around the center of the limiting groove (4) and the center of the fixing plate (31), respectively.

6. The high-precision tool clamping device for CNC lathes according to claim 2, characterized in that, The first conductive post (24) and the second conductive post (37) are evenly arranged around the center of the limiting groove (4) and the center of the fixing plate (31), respectively, and the first conductive post (24) and the second conductive post (37) are attached to each other to form an electrical connection.

7. The high-precision tool clamping device for CNC lathes according to claim 2, characterized in that, A PLC controller is provided on the inner side of the fixing frame (1), and a magnetic controller is provided on one side of the PLC controller. The PLC controller and the magnetic controller are electrically connected to the first annular electromagnet (22) and the first conductive post (24).

8. The high-precision tool clamping device for CNC lathes according to claim 7, characterized in that, The piezoelectric ceramic electrostrictive column (23) is electrically connected to the PLC controller and the magnetic controller, and the second annular electromagnet (35) is electrically connected to the second conductive column (37).

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