Giant magnetostrictive micro-drive tool rest device

Abstract

The utility model relates to a giant magnetostrictive micro-drive knife rest device, which comprises a sleeve seat, a giant magnetostrictive driver, a knife and a clamping mechanism, the giant magnetostrictive driver is fixed in the sleeve seat, an output port is arranged on the sleeve seat, one end of the giant magnetostrictive driver penetrates through the output port to be connected with the knife, and the other end of the giant magnetostrictive driver is connected with the clamping mechanism. And the cutter is mounted on the clamping mechanism. The giant magnetostrictive micro-drive tool rest device has good output performance, can meet the requirement for suppressing flutter in the turning process, can control the displacement of the giant magnetostrictive driver by controlling the magnitude of current, can output equivalent vibration displacement opposite to a flutter signal by utilizing the giant magnetostrictive micro-drive turning tool rest, and has the advantages of being simple in structure and convenient to operate. And turning chatter is inhibited.

Description

Technical Field

[0001] The utility model relates to the field of lathe parts, in particular to a giant magnetostrictive micro-driving tool holder device. Background Art

[0002] With the development of industrialization, modern manufacturing technology has higher and higher requirements for mechanical processing. However, it is common for thin-walled parts to vibrate during machining. If this vibration is not controlled, the processing quality and efficiency of the parts will be reduced, which will have a great impact on efficient production.

[0003] The structure of thin-walled inner cavity parts is relatively complex. When turning such parts, special long overhang tools are required. Cantilever beam processing is unstable and easily disturbed, resulting in cutting chatter, which can damage the tool and scrap the parts, affecting production efficiency. Giant magnetostrictive actuators have the advantages of magnetostriction under the action of an excitation magnetic field, high precision, large displacement, high frequency drive, and simple structure. They have been widely used in active control technology of chatter. Therefore, for turning thin-walled inner cavity parts, it is a very important and valuable task to explore the active control strategy of cutting chatter and study and design a new giant magnetostrictive micro-drive tool holder.

[0004] The core component of the giant magnetostrictive actuator is the giant magnetostrictive material, which is widely used due to its high mechanical energy-electrical energy conversion rate at room temperature, high energy density, good reliability, and simple driving method. The response time of the giant magnetostrictive material to produce the magnetostrictive effect is extremely short, and the magnetization and stress generation effects occur almost simultaneously. This feature can be used for ultra-high sensitive electromagnetic drive elements. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the utility model provides a giant magnetostrictive micro-drive tool holder device, which aims to solve the problem of chatter phenomenon occurring during machining of thin-walled parts and improve the machining quality and precision of parts.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A giant magnetostrictive micro-drive tool holder device comprises a sleeve seat, a giant magnetostrictive driver, a tool and a clamping mechanism. The giant magnetostrictive driver is fixed in the sleeve seat, an output port is provided on the sleeve seat, one end of the giant magnetostrictive driver passes through the output port and is connected to the tool, and the tool is mounted on the clamping mechanism.

[0008] As a preferred technical solution, a vibration-damping groove is provided on the clamping mechanism.

[0009] As a preferred technical solution, a threaded hole is provided on the sleeve seat, and the giant magnetostrictive micro-drive tool holder device is connected to the machine tool through the threaded hole on the sleeve seat.

[0010] As a preferred technical solution, the giant magnetostrictive driver includes a coil frame, an outer shell, an output push rod, a giant magnetostrictive rod, a heat dissipation isolation layer and a lower sealing plate, wherein the heat dissipation isolation layer is located in the middle position inside the outer shell, the coil frame is installed above the heat dissipation isolation layer, the giant magnetostrictive rod is located in the middle of the coil, permanent magnets are provided at both ends of the heat dissipation isolation layer, the giant magnetostrictive rod is connected to the tool through the output push rod, and the lower sealing plate is located on the side of the outer shell away from the tool.

[0011] As a preferred technical solution, the giant magnetostrictive actuator also includes a disc spring, a sliding bearing and an upper end cover, the output push rod passes through the inner ring of the sliding bearing, the upper end cover is fixed at the output port of the outer shell and is fixedly connected to the outer ring of the sliding bearing, and the disc spring is located between the output push rod and the upper end cover.

[0012] As a preferred technical solution, the upper end cover, the outer shell and the sleeve seat of the giant magnetostrictive actuator are connected by threads.

[0013] As a preferred technical solution, the giant magnetostrictive rod is connected to a tensile pressure sensor.

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

[0015] (1) The giant magnetostrictive micro-drive tool holder device of the utility model has a giant magnetostrictive drive rod with large magnetostriction and high response speed. The giant magnetostrictive micro-drive tool holder developed based on this material has good output performance and can meet the requirements of suppressing chatter during turning.

[0016] (2) The giant magnetostrictive micro-drive tool holder device of the utility model, wherein the giant magnetostrictive actuator changes the driving magnetic field strength by changing the input current strength, and the displacement of the giant magnetostrictive actuator can be controlled by controlling the current size. The giant magnetostrictive micro-drive turning tool holder can output an equivalent vibration displacement opposite to the chatter signal, thereby suppressing turning chatter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the giant magnetostrictive micro-drive tool holder device of the utility model;

[0018] Figure 2 It is a cross-sectional view of the giant magnetostrictive micro-drive tool holder device of the utility model.

[0019] In the figure: 1. sleeve seat; 2. coil skeleton; 3. outer shell; 4. upper end cover; 5. giant magnetostrictive driver; 6. output push rod; 7. tool; 8. clamping mechanism; 9. sliding bearing; 10. disc spring; 11. giant magnetostrictive rod; 12. heat dissipation isolation layer; 13. permanent magnet; 14. lower sealing plate. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with specific implementation methods:

[0021] like Figure 1 As shown, a giant magnetostrictive micro-drive tool holder device includes a sleeve seat 1, a giant magnetostrictive driver 5, a tool 7 and a clamping mechanism 8. The giant magnetostrictive driver 5 is fixed in the sleeve seat 1. The sleeve seat 1 is provided with an output port. One end of the giant magnetostrictive driver 5 passes through the output port and is connected to the clamping mechanism 8. The tool 7 is installed on the clamping mechanism 8.

[0022] A vibration-damping groove is provided on the clamping mechanism 8. The vibration-damping groove can offset a part of the vibration.

[0023] A threaded hole is provided on the sleeve seat 1 , and the giant magnetostrictive micro-drive tool holder device is connected to the machine tool through the threaded hole on the sleeve seat 1 .

[0024] like Figure 2 As shown, the giant magnetostrictive driver 5 includes a coil frame 2, an outer shell 3, an output push rod 6, a giant magnetostrictive rod 11, a heat dissipation isolation layer 12 and a lower sealing plate 14, wherein the heat dissipation isolation layer 12 is located in the middle of the outer shell 3, the coil frame 2 is installed above the heat dissipation isolation layer 12, the giant magnetostrictive rod 11 is located in the middle of the coil, permanent magnets 13 are provided at both ends of the heat dissipation isolation layer 12, the giant magnetostrictive rod 11 is connected to the tool 7 through the output push rod 6, and the lower sealing plate 14 is located on the side of the outer shell 3 away from the tool 7. After the coil frame 2 is energized, an excitation magnetic field is generated, which changes the lateral length of the giant magnetostrictive rod 11, further driving the output push rod 6 to generate displacement and output force, thereby pushing the tool 7 to generate displacement.

[0025] The giant magnetostrictive actuator 5 further includes a disc spring 10, a sliding bearing 9 and an upper end cover 4. The output push rod 6 passes through the inner ring of the sliding bearing 9. The upper end cover 4 is fixed at the output port of the outer shell 3 and is fixedly connected to the outer ring of the sliding bearing 9. The disc spring 10 is located between the output push rod 6 and the upper end cover 4. The giant magnetostrictive rod 11 is connected to a tension pressure sensor. The disc spring 10, the sliding bearing 9 and the upper end cover 4 can provide a certain pre-pressure for the giant magnetostrictive driving rod. The size of the pre-pressure can be measured by the tension pressure sensor to determine the optimal working pressure, thereby ensuring the output performance of the giant magnetostrictive actuator 5 to the greatest extent.

[0026] The upper end cover 4, the outer shell 3 and the sleeve seat 1 of the giant magnetostrictive actuator 5 are connected by threads, thereby forming a closed loop to avoid magnetic leakage.

[0027] This embodiment is only a further explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A giant magnetostrictive micro-drive tool holder device, characterized in that: The invention comprises a sleeve seat, a giant magnetostrictive driver, a tool and a clamping mechanism. The giant magnetostrictive driver is fixed in the sleeve seat. An output port is arranged on the sleeve seat. One end of the giant magnetostrictive driver passes through the output port and is connected with the tool. The tool is mounted on the clamping mechanism.

2. The giant magnetostrictive micro-drive tool holder device according to claim 1, characterized in that: The clamping mechanism is provided with a vibration-damping groove.

3. The giant magnetostrictive micro-drive tool holder device according to claim 1, characterized in that: The sleeve seat is provided with a threaded hole, and the giant magnetostrictive micro-drive tool holder device is connected to the machine tool through the threaded hole on the sleeve seat.

4. The giant magnetostrictive micro-drive tool holder device according to claim 1, characterized in that: The giant magnetostrictive actuator comprises a coil frame, an outer shell, an output push rod, a giant magnetostrictive rod, a heat dissipation isolation layer and a lower sealing plate, wherein the heat dissipation isolation layer is located in the middle of the outer shell, the coil frame is installed above the heat dissipation isolation layer, the giant magnetostrictive rod is located in the middle of the coil, both ends of the heat dissipation isolation layer are provided with permanent magnets, the giant magnetostrictive rod is transmission-connected to a tool through the output push rod, and the lower sealing plate is located on a side of the outer shell away from the tool.

5. The giant magnetostrictive micro-drive tool holder device according to claim 4, characterized in that: The giant magnetostrictive actuator also includes a disc spring, a sliding bearing and an upper end cover, the output push rod passes through the inner ring of the sliding bearing, the upper end cover is fixed at the output port of the outer shell and is fixedly connected to the outer ring of the sliding bearing, and the disc spring is located between the output push rod and the upper end cover.

6. The giant magnetostrictive micro-drive tool holder device according to claim 5, characterized in that: The upper end cover, the outer shell and the sleeve seat of the giant magnetostrictive actuator are connected by threads.

7. The giant magnetostrictive micro-drive tool holder device according to claim 4, characterized in that: The giant magnetostrictive rod is connected to a tension pressure sensor.

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