Electrical Discharge Assisted Ultrasonic Vibration Turning Composite Machining Equipment and Machining Method

Abstract

The present application discloses an electro-discharge assisted ultrasonic vibration turning composite machining device, which includes a machine tool, a chuck provided on the machine tool, a moving turning device provided on one side of the upper part of the machine tool and equipped with a cutting tool, a mounting bracket provided on the other side of the upper part of the machine tool and connected to the moving turning device, a discharge heating device provided on the mounting bracket, and an ultrasonic generating device provided on the moving turning device. The present application also discloses an electro-discharge assisted ultrasonic vibration turning composite machining method. The present application enables turning the workpiece while heating the workpiece by discharge, thereby not only realizing heating and softening the workpiece, reducing the turning difficulty of the cutting tool for turning the workpiece, but also reducing the wear of the cutting tool to extend the service life of the cutting tool, and further improving the machining efficiency and achieving high-efficiency and precision turning effects. At the same time, the ultrasonic generating device can make the cutting tool perform high-frequency periodic vibration movement, which is beneficial to chip breaking of the cutting tool, reducing the phenomenon of cutting heat, and reducing the cutting force and other outstanding effects.

Description

Technical Field

[0001] This application relates to the technical field of turning machining, specifically to an electro-discharge assisted ultrasonic vibration turning composite machining device and an electro-discharge assisted ultrasonic vibration turning composite machining method. Background Art

[0002] Currently, turning machining technology is the foundation of the mechanical machining field. Turning is to drive a cutting tool to move by a lathe to perform turning machining on the outer surface of a workpiece. The common method is to perform turning by contacting the cutting tool with the workpiece surface. Therefore, the resistance generated during turning is relatively large. Especially when turning difficult-to-machine metal materials, not only is the wear of the cutting tool large, but also there are problems such as low machining efficiency and poor machining surface quality. For this reason, those skilled in the art urgently need to develop an electro-discharge assisted ultrasonic vibration turning composite machining device to meet the actual use requirements. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide an electro-discharge assisted ultrasonic vibration turning composite machining device for the above-mentioned technical problems.

[0004] To solve the above technical problems, this application is realized through the following technical solutions:

[0005] An electro-discharge assisted ultrasonic vibration turning composite machining device includes a machine tool, a chuck provided on the machine tool for clamping a workpiece, a moving turning device provided on one side of the upper part of the machine tool for moving and turning the workpiece, a tool for turning the workpiece provided on the moving turning device. The electro-discharge assisted ultrasonic vibration turning composite machining device further includes:

[0006] An installation bracket, which is provided on the other side of the upper part of the machine tool, is connected to the moving turning device, and is driven to move following the moving turning device;

[0007] A discharge heating device, which is provided on the installation bracket and is used to discharge electricity to heat the workpiece;

[0008] An ultrasonic generating device, which is provided on the moving turning device and is used to generate ultrasonic waves to vibrate the tool at a high frequency.

[0009] For the electro-discharge assisted ultrasonic vibration turning composite machining device as described above, the electro-discharge assisted ultrasonic vibration turning composite machining device further includes a spacing adjusting device provided on the installation bracket and used to adjust the spacing between the discharge heating device and the workpiece.

[0010] For the electro-discharge assisted ultrasonic vibration turning composite machining device as described above, the installation bracket includes:

[0011] An installation base plate, which is provided at the rear side of the upper part of the machine tool and is connected to the moving turning device;

[0012] An installation vertical plate, which is slidably connected to the installation vertical plate, connected to the discharge heating device, and connected to the spacing adjustment device.

[0013] For the electric discharge assisted ultrasonic vibration turning composite machining equipment as described above, the spacing adjustment device includes:

[0014] An adjustment driving group, which is arranged on the upper rear side of the installation bottom plate;

[0015] A connecting adjustment rod, one end of which is connected to the power output end of the adjustment driving group, the other end passes through the installation vertical plate and is rotatably connected to the installation bottom plate, and the middle part of which is threadedly connected to the installation vertical plate. When driven by the adjustment driving group, it is used to drive the installation vertical plate to move back and forth to adjust the distance between the discharge heating device and the workpiece.

[0016] For the electric discharge assisted ultrasonic vibration turning composite machining equipment as described above, the discharge heating device includes:

[0017] A hollow brush, which is used to sleeve on the workpiece and is connected to the pulse power supply;

[0018] A discharge electrode, which is arranged on the upper front side of the installation vertical plate and is connected to the pulse power supply.

[0019] For the electric discharge assisted ultrasonic vibration turning composite machining equipment as described above, a rear concave position is provided on the front side of the discharge electrode, and the cross-sectional shape of the rear concave position is arc-shaped.

[0020] For the electric discharge assisted ultrasonic vibration turning composite machining equipment as described above, the moving turning device includes a connecting frame, and a moving driving group connected to the connecting frame and used to drive the connecting frame to move;

[0021] A tool is arranged on the upper side of the connecting frame;

[0022] The ultrasonic generating device includes:

[0023] An ultrasonic generator, which is arranged on one side of the connecting frame;

[0024] An ultrasonic transducer, which is arranged inside the connecting frame and is connected to the ultrasonic generator;

[0025] An ultrasonic horn, which is arranged on the rear end of the ultrasonic transducer, and the rear end of which is in contact with the inner rear side wall of the connecting frame.

[0026] The electro-discharge assisted ultrasonic vibration turning composite machining equipment as described above further includes a working fluid circulation supply system on the machine tool for circulating and supplying the working fluid. The working fluid supply system includes:

[0027] A working fluid storage tank for storing the working fluid;

[0028] A working fluid output pipe group provided on one side of the working fluid storage tank, with one end connected to the working fluid storage tank and the other end for outputting the working fluid to the workpiece to be machined;

[0029] A working fluid recovery tank provided below the workpiece to be machined for recovering the working fluid;

[0030] A working fluid filter plate provided in the working fluid recovery tank for filtering the recovered working fluid;

[0031] A working fluid return pipe group connected to one side of the working fluid recovery tank for returning the filtered working fluid to the working fluid storage tank.

[0032] In the electro-discharge assisted ultrasonic vibration turning composite machining equipment as described above, an inclined slope is provided between the working fluid filter plate and the bottom of the working fluid recovery tank, and the inclined slope is used for the dirt mixed in the working fluid to slide down obliquely.

[0033] This application also provides an electro-discharge assisted ultrasonic vibration turning composite machining method, including the following steps:

[0034] S1. First, clamp the workpiece on the chuck of the machine tool, and then perform the tool setting operation;

[0035] S2. Sleeve the hollow electric brush connected to the pulse power supply on the workpiece, and then adjust the distance between the discharge electrode and the workpiece through the distance adjustment device;

[0036] S3. Turn on the pulse power supply, and at the same time start the mobile turning device and the ultrasonic generator;

[0037] S4. When the mobile turning device moves to turn the workpiece, the mobile turning device drives the section discharge electrode to move together, and then heats the workpiece by discharging while turning the workpiece. At the same time, the ultrasonic generator generates ultrasonic waves to vibrate the cutting tool provided on the mobile turning device at a high frequency, and the cutting tool is vibrated periodically at a high frequency to break chips and dissipate heat at a high frequency.

[0038] Compared with the prior art, the above application has the following advantages:

[0039] This application connects a pulse power supply through the discharge heating device for heating the workpiece by discharge. Then, when the mobile turning device drives the discharge heating device to move together, it is possible to heat and turn the workpiece simultaneously by discharge. This can not only heat and soften the workpiece, reduce the turning difficulty of the turning tool on the workpiece, but also further reduce the tool wear to extend the tool life, and further improve the processing efficiency and achieve high-efficiency and precision turning effects. In addition, the ultrasonic generating device is connected to an external AC power supply, outputs high-frequency vibration and transmits it to the tool, causing the tool to perform high-frequency periodic vibration motion, which is conducive to chip breaking of the tool, reducing cutting heat, and reducing cutting force and other prominent effects. Description of the Drawings

[0040] Figure 1 is a schematic diagram of the electro-discharge assisted ultrasonic vibration turning composite machining equipment of this application.

[0041] Figure 2 is Figure 1 is a partial enlarged view Figure Ⅰ .

[0042] Figure 3 is a perspective view of the electro-discharge assisted ultrasonic vibration turning composite machining equipment of this application.

[0043] Figure 4 is a partial exploded view of the electro-discharge assisted ultrasonic vibration turning composite machining equipment of this application.

[0044] Figure 5 is Figure 4 is a partial enlarged view of Figure Ⅱ .

[0045] Figure 6 is a perspective view of the mobile turning device and the ultrasonic generating device in the electro-discharge assisted ultrasonic vibration turning composite machining equipment of this application.

[0046] Figure 7 is the ultrasonic generating device, the discharge heating device, and the spacing adjusting device in the electro-discharge assisted ultrasonic vibration turning composite machining equipment of this application.

[0047] Figure 8 is Figure 7 is a partial enlarged view of Figure Ⅲ . Detailed Description of the Embodiment

[0048] The following further describes this application in detail through specific embodiments in conjunction with the drawings.

[0049] As Figures 1 to 8As shown in the figure, an electro-discharge assisted ultrasonic vibration turning composite machining device includes a machine tool, a chuck 1, a moving turning device 2, a mounting bracket 3, a discharge heating device 4, and an ultrasonic generating device 5.

[0050] Specifically, the chuck 1 is arranged on the machine tool for clamping a workpiece; the moving turning device 2 is arranged on one side of the upper part of the machine tool and is used for moving to turn the workpiece; a tool 21 for turning the workpiece is arranged on the moving turning device 2; the mounting bracket 3 is arranged on the other side of the upper part of the machine tool, is connected to the moving turning device 2, and moves following the movement of the moving turning device 2; the discharge heating device 4 is arranged on the mounting bracket 3 and is used for discharging electricity to heat the workpiece; the ultrasonic generating device 5 is arranged on the moving turning device 2 and is used for generating ultrasonic waves to vibrate the tool 21 at a high frequency.

[0051] In the electro-discharge assisted ultrasonic vibration turning composite machining device of the present application, the discharge heating device 4 is connected to a pulse power supply to heat the workpiece by discharging. Then, when the moving turning device 2 drives the discharge heating device 4 to move together, it is possible to turn the workpiece while heating the workpiece by discharging. Thus, not only can the workpiece be heated and softened to reduce the turning difficulty of the turning tool for turning the workpiece, but also the tool wear can be further reduced to extend the tool service life, and the machining efficiency can be further improved to achieve an efficient and precise turning effect. Also, the ultrasonic generating device 5 is connected to an external AC power supply, outputs high-frequency vibration and transmits it to the tool 21, so that the tool 21 makes a high-frequency periodic vibration movement, which is beneficial to chip breaking of the tool 21, reduction of cutting heat, and reduction of cutting force and other prominent effects.

[0052] Furthermore, the electro-discharge assisted ultrasonic vibration turning composite machining device further includes a spacing adjusting device 6 arranged on the mounting bracket 3 and used for adjusting the spacing between the discharge heating device 4 and the workpiece.

[0053] Even further, the mounting bracket 3 includes a mounting base plate 31 and a mounting vertical plate 32.

[0054] The mounting base plate 31 is arranged at the rear side of the upper part of the machine tool and is connected to the moving turning device 2; the mounting vertical plate 32 is slidably connected to the mounting vertical plate 31, is connected to the discharge heating device 4, and is connected to the spacing adjusting device 6. The purpose is to meet the actual use requirements.

[0055] Even further, the spacing adjusting device 6 includes an adjusting drive group 61 and a connecting adjusting rod 62.

[0056] The adjustment driving group 61 is arranged at the upper rear side of the mounting base plate 31; one end of the connecting adjustment rod 62 is connected to the power output end of the adjustment driving group 61, and the other end passes through the mounting vertical plate 32 and is rotatably connected to the mounting base plate 31, and the middle part thereof is threadedly connected to the mounting vertical plate 32. When driven by the adjustment driving group 61, it is used to drive the mounting vertical plate 32 to move back and forth to adjust the distance between the discharge heating device 4 and the workpiece. Its advantage is that it is convenient to adjust to adapt to workpieces of different sizes.

[0057] Furthermore, the discharge heating device 4 includes a hollow electric brush 41 and a discharge electrode 42.

[0058] The hollow electric brush 41 is used to be sleeved on the workpiece and is connected to the pulse power supply; the discharge electrode 42 is arranged at the upper front side of the mounting vertical plate 32 and is connected to the pulse power supply. Its purpose is to meet the actual use requirements.

[0059] Furthermore, a rear concave position 421 is formed on the front side of the discharge electrode 42, and the cross-sectional shape of the rear concave position 421 is arc-shaped. Its purpose is to be adapted to the outer shape of the workpiece, so as to be beneficial to further improving the discharge efficiency.

[0060] Furthermore, the moving turning device 2 includes a connecting frame 200 and a moving driving group connected to the connecting frame 200 and used to drive the connecting frame 200 to move;

[0061] The tool 21 is arranged on the upper side of the connecting frame 200;

[0062] The ultrasonic generating device 5 includes an ultrasonic generator 51, an ultrasonic transducer 52, and an ultrasonic horn 53; the ultrasonic generator 51 is arranged on one side of the connecting frame 200; the ultrasonic transducer 52 is arranged inside the connecting frame 200 and is connected to the ultrasonic generator 51; the ultrasonic horn 53 is arranged on the rear end of the ultrasonic transducer 52, and its rear end is in contact with the rear side wall inside the connecting frame 200. Its advantage is that when the ultrasonic generator 51 is connected to an external AC power supply, it can output a high-frequency oscillation signal to the ultrasonic transducer 52. Subsequently, the ultrasonic transducer 52 excites the ultrasonic horn 53 to generate high-frequency telescopic deformation. Thus, the high-frequency deformation motion is amplified by the ultrasonic horn 53 and transmitted to the tool 21, making the tool 21 perform high-frequency periodic vibration motion, and further being beneficial to prominent effects such as chip breaking of the tool 21, reduction of cutting heat, and reduction of cutting force.

[0063] Furthermore, the EDM-assisted ultrasonic vibration turning composite machining equipment also includes a working fluid circulation supply system 7 on the machine tool for circulating the working fluid, and the working fluid supply system 7 includes a working fluid container 71, a working fluid output pipe group 72, a working fluid recovery tank 73, a working fluid filter plate 74, and a working fluid reflux pipe group 75.

[0064] The working fluid container 71 is used to contain working fluid. The working fluid output pipe group 72 is arranged at one side of the working fluid container 71, and one end is connected to the working fluid container 71, and the other end is used to output working fluid to the workpiece being processed. The working fluid recovery tank 73 is arranged at the lower side of the workpiece being processed, and is used to recover working fluid. The working fluid filter plate 74 is arranged in the working fluid recovery tank 73, and is used to filter the recovered working fluid. The working fluid reflux pipe group 75 is connected to one side of the working fluid recovery tank 73, and is used to return the filtered working fluid to the working fluid container 71. The advantage is that the working fluid can be recycled. The working fluid is a discharge medium, and it also plays a role in cooling and chip removal during the processing. Commonly used working fluids are media with low viscosity, high flash point and stable performance, such as kerosene, deionized water and emulsion.

[0065] Furthermore, the working fluid filter plate 74 is provided with a plurality of filter holes 741, and an inclined slope 76 is provided between the working fluid filter plate 74 and the bottom of the working fluid recovery tank 73, and the inclined slope 76 is used to slide down the dirt mixed in the working fluid. The advantage is that the dirt mixed in the filtered working fluid can be reduced, and the filtering efficiency can be further improved.

[0066] The present application also mentions an electrospark-assisted ultrasonic vibration turning composite machining method, comprising the following steps:

[0067] S1, first clamp the workpiece on the chuck 1 on the machine tool, and then perform tool setting;

[0068] S2, the hollow brush 41 connected to the pulse power supply is sleeved on the workpiece, and then the distance between the discharge electrode 42 and the workpiece is adjusted by the distance adjustment device 6;

[0069] S3, turning on the pulse power supply, and starting the mobile turning device 2 and the ultrasonic generating device 5 at the same time;

[0070] S4, when the mobile turning device 2 moves to turn the workpiece, the mobile turning device 2 drives the discharge electrode 42 to move together, and then discharges and heats the workpiece while turning the workpiece. At the same time, the ultrasonic generating device 5 generates ultrasonic waves to vibrate the tool 21 installed on the mobile turning device 2 at high frequency, and the tool 21 is vibrated periodically at high frequency to break chips and dissipate heat at high frequency.

[0071] This application connects a pulse power supply through the discharge heating device 4 for discharging and heating the workpiece. Subsequently, when the mobile turning device 2 drives the discharge heating device 4 to move together, it is possible to discharge and heat the workpiece while turning the workpiece. Thus, not only can the workpiece be heated and softened, the turning difficulty of the turning tool for turning the workpiece be reduced, but also the tool wear can be further reduced to extend the tool service life, and the processing efficiency can be further improved to achieve an efficient and precise turning effect. In addition, the ultrasonic generating device 5 is connected to an external AC power supply, outputs high-frequency vibration and transmits it to the tool 21, so that the tool 21 makes a high-frequency periodic vibration movement, which is conducive to chip breaking of the tool 21, reduction of cutting heat, and reduction of cutting force and other prominent effects.

[0072] Furthermore, in step S2, the spacing adjusting device 6 cooperates with the existing electric discharge automatic control feeding system to automatically adjust the spacing between the discharge electrode 42 and the workpiece, thereby achieving the purpose of automatic adjustment.

[0073] In summary, the embodiments of this application have been described in detail, but this application is not limited to the above embodiments. Even if various changes are made to this application, they still fall within the protection scope of this application.

Claims

1. Electro-discharge assisted ultrasonic vibration turning composite machining equipment, comprising a machine tool, a chuck (1) provided on the machine tool for clamping a workpiece, and a moving turning device (2) provided on one side of the upper part of the machine tool for moving and turning the workpiece. A cutting tool (21) for turning the workpiece is provided on the moving turning device (2), and it is characterized in that, The electro-discharge assisted ultrasonic vibration turning composite machining equipment further includes: A mounting bracket (3), which is arranged on the other side of the upper part of the machine tool, is connected to the moving turning device (2), and moves following the movement of the moving turning device (2); An electric discharge heating device (4), which is arranged on the mounting bracket (3) and is used for energizing to heat the workpiece by electric discharge; An ultrasonic generating device (5), which is arranged on the moving turning device (2) and is used for generating ultrasonic waves to vibrate the cutting tool (21) at high frequency; The electro-discharge assisted ultrasonic vibration turning composite machining equipment further includes a spacing adjusting device (6) arranged on the mounting bracket (3) and used for adjusting the spacing between the electric discharge heating device (4) and the workpiece; The mounting bracket (3) includes: A mounting base plate (31), which is arranged at the rear side of the upper part of the machine tool and is connected to the moving turning device (2); A mounting vertical plate (32), which is slidably connected to the mounting vertical plate (31), is connected to the electric discharge heating device (4), and is connected to the spacing adjusting device (6); The spacing adjusting device (6) includes: An adjusting driving group (61), which is arranged at the upper rear side of the mounting base plate (31); A connecting adjusting rod (62), one end of which is connected to the power output end of the adjusting driving group (61), the other end of which penetrates through the mounting vertical plate (32) and is rotatably connected to the mounting base plate (31), and the middle part of which is threadedly connected to the mounting vertical plate (32). When driven by the adjusting driving group (61), it is used to drive the mounting vertical plate (32) to move back and forth to adjust the distance between the electric discharge heating device (4) and the workpiece; The electric discharge heating device (4) includes: a hollow electric brush (41), which is used for sleeving on the workpiece and is connected to a pulse power supply; An electric discharge electrode (42), which is arranged at the front upper side of the mounting vertical plate (32) and is connected to the pulse power supply; The spacing adjusting device (6) cooperates with an electro-discharge automatic control feeding system to adjust the spacing between the electric discharge electrode (42) and the workpiece.

2. The electro-discharge assisted ultrasonic vibration turning composite machining equipment according to claim 1, characterized in that: A rear concave position (421) is formed on the front side of the electric discharge electrode (42), and the cross-sectional shape of the rear concave position (421) is arc-shaped.

3. The electro-discharge assisted ultrasonic vibration turning composite machining equipment according to claim 1, characterized in that: The moving turning device (2) includes a connecting frame (200), and a moving driving group connected to the connecting frame (200) and used for driving the connecting frame (200) to move; The cutting tool (21) is arranged on the upper side of the connecting frame (200); The ultrasonic generating device (5) includes: An ultrasonic generator (51), which is arranged on one side of the connecting frame (200); An ultrasonic transducer (52), which is arranged inside the connecting frame (200) and is connected to the ultrasonic generator (51); An ultrasonic horn (53), which is arranged at the rear end of the ultrasonic transducer (52), and the rear end of which is in contact with the inner rear side wall of the connecting frame (200).

4. The electro-discharge assisted ultrasonic vibration turning composite machining equipment according to claim 1, characterized in that: The electro-discharge assisted ultrasonic vibration turning composite machining equipment further includes a working fluid circulating supply system (7) on the machine tool for circulating and supplying the working fluid. The working fluid circulating supply system (7) includes: The working fluid storage tank (71) is used to store the working fluid; The working fluid output pipe group (72) is arranged on one side of the working fluid storage tank (71), with one end connected to the working fluid storage tank (71) and the other end used to output the working fluid to the workpiece to be machined; The working fluid recovery tank (73) is arranged below the workpiece to be machined and is used to recover the working fluid; The working fluid filter plate (74) is arranged in the working fluid recovery tank (73) and is used to filter the recovered working fluid; The working fluid return pipe group (75) is connected to one side of the working fluid recovery tank (73) and is used to return the filtered working fluid to the working fluid storage tank (71).

5. The electro-discharge assisted ultrasonic vibration turning composite machining equipment according to claim 4, characterized in that: An inclined slope (76) is provided between the working fluid filter plate (74) and the bottom of the working fluid recovery tank (73), and the inclined slope (76) is used to let the dirt mixed in the working fluid slide down obliquely.

6. The electro-discharge assisted ultrasonic vibration turning composite machining method can be applied to the electro-discharge assisted ultrasonic vibration turning composite machining equipment described in any one of claims 1-5, and is characterized in that, It includes the following steps: S1. First, clamp the workpiece on the chuck (1) of the machine tool, and then perform the tool setting operation; S2. Sleeve the hollow electric brush (41) connected to the pulse power supply on the workpiece, and then adjust the distance between the discharge electrode (42) and the workpiece through the distance adjustment device (6) in cooperation with the electro-discharge automatic control feed system; S3. Turn on the pulse power supply, and at the same time start the mobile turning device (2) and the ultrasonic generating device (5); S4. When the mobile turning device (2) turns the workpiece, the mobile turning device (2) drives the discharge electrode (42) to move together, and then heats the workpiece by discharging while turning the workpiece. At the same time, the ultrasonic generating device (5) generates ultrasonic waves to vibrate the cutting tool (21) arranged on the mobile turning device (2) at a high frequency, and the cutting tool (21) is vibrated periodically at a high frequency to break chips and dissipate heat at a high frequency.

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