CN210996506U - Pulse current and ultrasonic composite auxiliary cutting device - Google Patents
Pulse current and ultrasonic composite auxiliary cutting device Download PDFInfo
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- CN210996506U CN210996506U CN201921301723.XU CN201921301723U CN210996506U CN 210996506 U CN210996506 U CN 210996506U CN 201921301723 U CN201921301723 U CN 201921301723U CN 210996506 U CN210996506 U CN 210996506U
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Abstract
The utility model discloses a pulse current and compound supplementary cutting processingequipment of supersound, it comprises ultrasonic vibration cutting device and pulse power supply unit. The ultrasonic vibration cutting device consists of a sandwich type piezoelectric transducer, an ultrasonic generator, an ultrasonic amplitude transformer, a support frame and a turning tool; the pulse power supply device consists of an oscilloscope and a pulse power supply, and is connected to the workpiece to apply pulse current to the workpiece during shot blasting. The utility model also discloses a pulse current and ultrasonic combined auxiliary cutting processing method, which utilizes the pulse current to generate the electro-plastic effect on the metal material, improves the plasticity of the workpiece and reduces the strength of the surface of the workpiece; the intermittent cutting is generated by utilizing the radial ultrasonic vibration, and the discontinuous contact between the cutter and the workpiece is realized, so that the aims of reducing the cutting force and the cutting temperature, improving the cutter abrasion and improving the surface integrity of the workpiece are fulfilled.
Description
Technical Field
The utility model belongs to the technical field of metal surfacing, a surface machining technique of complicated part is related to, specifically include a pulse current and compound supplementary cutting process device of supersound.
Background
With the higher and higher requirements on material performance in the fields of aerospace, war industry and the like, more and more new materials with excellent performance are provided. However, the material has extremely poor cutting workability due to the improvement of material properties. In order to improve the life of the cutting tool and the surface quality of the workpiece, various auxiliary cutting methods such as liquid nitrogen cooling, laser heating, ultrasonic vibration, pulse current, and the like are continuously available. The ultrasonic vibration cutting changes continuous cutting into intermittent cutting, so that the cutting force and the cutting temperature can be effectively reduced, and the service life of the cutter is prolonged; the pulse current auxiliary cutting effectively utilizes the electro-plastic effect of metal materials, improves the plasticity of workpieces, reduces the surface hardness of the workpieces, and reduces the wear rate of cutters. However, the single process method has a limited improvement in machinability of difficult-to-machine materials such as titanium alloys and nickel-based alloys.
SUMMERY OF THE UTILITY MODEL
In order to further improve the cutting processing performance of workpiece materials, the utility model provides a pulse current and ultrasonic combined auxiliary cutting processing device and method, a pulse power supply generates pulse current, and the electro-plastic effect of the pulse current is utilized; the radial ultrasonic vibration cutting device enables the cutter to generate ultrasonic vibration, and in any complete vibration cutting period, due to the action of the ultrasonic vibration, the effective cutting time of the cutter is very short in the machining process, so that the cutter and the chips of the workpiece are separated in part of time, the cutter and the chips of the workpiece are not in continuous contact, and the cutting heat is greatly reduced. The combination of the two process methods can further reduce the cutting force and the cutting temperature, improve the surface integrity of the workpiece and improve the cutting processing performance of the workpiece.
The utility model discloses a pulse current and compound supplementary cutting processingequipment of supersound, the technical scheme who adopts is:
consists of an ultrasonic vibration cutting device and a pulse power supply device; the ultrasonic vibration cutting device consists of a sandwich type piezoelectric transducer, an ultrasonic generator, an ultrasonic amplitude transformer and a cutting tool; the ultrasonic generator is connected with the sandwich type piezoelectric transducer and provides an ultrasonic frequency electric signal for the sandwich type piezoelectric transducer; the sandwich type piezoelectric transducer is connected with the ultrasonic amplitude transformer and is connected with the cutting tool; the sandwich piezoelectric transducer converts the received ultrasonic frequency electrical signal into ultrasonic mechanical vibration, and the ultrasonic mechanical vibration with a certain amplitude is output and transmitted to the cutting tool after being amplified by the ultrasonic amplitude transformer, so that the high-speed vibration of the cutting tool and a workpiece in the cutting process is realized; the pulse power supply device is connected with the workpiece and provides pulse current for the workpiece.
In a preferred embodiment of the present invention, the cutting tool and the ultrasonic horn are connected in an embedded manner, and are reinforced by a bolt.
In a preferred embodiment of the present invention, the sandwich piezoelectric transducer and the ultrasonic horn are fixed to a support frame by a hexagon socket head cap screw.
In a preferred embodiment of the present invention, the pulse power supply device is composed of an oscilloscope and a pulse power supply; the pulse power supply is connected with the workpiece and used for providing pulse current for the workpiece, and the oscilloscope monitors the current and the voltage in the workpiece.
In a preferred embodiment of the present invention, the positive pole of the pulse power supply is connected to the workpiece through the brush, and the negative pole of the pulse power supply is connected to the workpiece through the elastic conductive bracket to form a closed loop.
In a preferred embodiment of the present invention, one end of the workpiece is clamped on a chuck of the lathe, and the chuck drives the workpiece to rotate.
In a preferred embodiment of the present invention, the other end of the workpiece is supported by a thimble of a lathe.
In a preferred embodiment of the present invention, for safety, an insulating member is disposed between the cutting tool and the ultrasonic horn, between the chuck and the workpiece, between the thimble and the lathe, or between the elastic conductive support and the lathe.
Compared with the prior art, the utility model discloses an obvious advantage lies in:
1. compared with a single special machining method, the cutting force is smaller, the cutting temperature is lower, the service life of the cutter is further prolonged, and the surface quality is higher;
2. the cutting processing performance of workpiece materials can be greatly improved at a relatively low workpiece heating temperature (less than or equal to 100 ℃), and meanwhile, the high-temperature oxidation phenomenon on the surface of a workpiece can be avoided, and the bonding abrasion of a cutter is weakened.
The utility model utilizes the pulse current to generate the electro-plastic effect on the metal material, thereby improving the plasticity of the workpiece and reducing the strength of the surface of the workpiece; the intermittent cutting is generated by utilizing the radial ultrasonic vibration, and the discontinuous contact between the cutter and the workpiece is realized, so that the aims of reducing the cutting force and the cutting temperature, improving the cutter abrasion and improving the surface integrity of the workpiece are fulfilled.
Drawings
Fig. 1 is a schematic structural diagram of the pulse current and ultrasound combined auxiliary cutting device of the present invention.
Fig. 2 is a schematic diagram of a sandwich type piezoelectric transducer of the pulse current and ultrasonic combined auxiliary cutting processing device of the present invention.
Fig. 3 is a sectional view of a sandwich piezoelectric transducer of a pulse current and ultrasonic combined auxiliary cutting processing device.
Fig. 4 is a schematic structural diagram of an ultrasonic horn of the pulse current and ultrasonic combined auxiliary cutting device of the present invention.
Fig. 5 is a left side view of fig. 4.
Fig. 6 is a top view of fig. 4.
Fig. 7 is a schematic structural view of the elastic conductive support of the pulse current and ultrasonic combined auxiliary cutting device of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the pulse current and ultrasonic combined auxiliary cutting device shown in the figure is composed of an ultrasonic vibration cutting device and a pulse power supply device.
The ultrasonic vibration cutting device consists of a sandwich type piezoelectric transducer 9, an ultrasonic generator 7, an ultrasonic amplitude transformer 10, a support frame 6 and a cutting tool 5.
The cutting tool 5 is connected with the ultrasonic horn 10 in an embedded manner, and the cutter shaft of the cutting tool 5 is embedded into the ultrasonic horn 10 (see fig. 4 to 6) and is reinforced by bolts.
The sandwich piezoelectric transducer 9 (see fig. 2 and 3) and the ultrasonic amplitude transformer 10 are fixed on a supporting frame 6 through a hexagonal socket head cap screw 8 and the shape and position
The ultrasonic generator 7 is connected with the sandwich type piezoelectric transducer 9 and provides an ultrasonic frequency electric signal for the sandwich type piezoelectric transducer 9; the sandwich piezoelectric transducer 9 converts the received ultrasonic frequency electrical signal into ultrasonic mechanical vibration, and the ultrasonic mechanical vibration with a certain amplitude is output and transmitted to the cutting tool 5 after being amplified by the ultrasonic amplitude transformer 10, so that the high-speed vibration of the cutting tool and the workpiece 4 in the cutting process is realized.
The pulse power supply device is composed of an oscilloscope 1 and a pulse power supply 13. The positive pole of the pulse power supply 13 is connected with the workpiece 4 through the electric brush 2, and the negative pole of the pulse power supply 13 is connected with the workpiece 4 through the elastic conductive bracket 12 (see fig. 7) to form a closed loop. The workpiece 4 is supplied with a pulsed current by a pulsed power supply 13, and the oscilloscope 1 monitors the current and voltage in the workpiece 4.
One end of a workpiece 4 is clamped on a chuck 3 of a lathe, the chuck 3 drives the workpiece 4 to rotate, and the other end of the workpiece 4 is propped against a thimble 11 of the lathe.
The utility model discloses because it has the electric current to lead to, has certain danger, needs to carry out insulation treatment to some devices, wherein fills up the insulating part between cutting tool 5 and ultrasonic wave amplitude transformer 10, between chuck 3 and the work piece 4, between thimble 13 and the lathe, between elastic conductive support 12 and the lathe to ensure that the electric current only circulates between work piece 4 and pulse power supply 13.
The method of the pulse current and ultrasonic combined auxiliary cutting device of the utility model is carried out according to the following procedures,
step one, a workpiece 4 is installed on a chuck 3 of a lathe, the position, close to the chuck 3, of the workpiece 4 is connected with the positive electrode of a pulse power supply 13 through an electric brush 2, and the position, close to an ejector pin 11, of the workpiece is connected with the negative electrode of a pulse current 13 through an elastic conductive support 12;
step two, connecting the cutting tool 5 with an ultrasonic vibration auxiliary cutting device and fixing the cutting tool on a tool rest of a lathe;
and step three, starting the lathe and adjusting working parameters.
And step four, turning on the ultrasonic generator 7 and starting to cut the workpiece.
And step five, when the cutting tool 5 and the workpiece 4 start to contact, turning on the pulse power supply 13, and adjusting the frequency and the magnitude of the pulse current of the pulse power supply 13 to generate the pulse current on the surface of the workpiece 4. The workpiece 4 can be cut.
The technological parameters of the utility model are as follows: the cutting speed is 40-70 m/min, the feeding amount is 0.05-0.20 mm/r, the back cutting amount is 0.5-2.0 mm, the frequency of a pulse power supply is 500-700 HZ, the output current is 30-60A, the charging voltage is 30-60V, the ultrasonic amplitude output by the transducer is 5-20 mu m, and the ultrasonic vibration frequency is 20-40 KHz.
Claims (8)
1. A pulse current and ultrasonic composite auxiliary cutting device is characterized by comprising an ultrasonic vibration cutting device and a pulse power supply device; the ultrasonic vibration cutting device consists of a sandwich type piezoelectric transducer, an ultrasonic generator, an ultrasonic amplitude transformer and a cutting tool; the ultrasonic generator is connected with the sandwich type piezoelectric transducer and provides an ultrasonic frequency electric signal for the sandwich type piezoelectric transducer; the sandwich type piezoelectric transducer is connected with the ultrasonic amplitude transformer and is connected with the cutting tool; the sandwich piezoelectric transducer converts the received ultrasonic frequency electrical signal into ultrasonic mechanical vibration, and the ultrasonic mechanical vibration with a certain amplitude is output and transmitted to the cutting tool after being amplified by the ultrasonic amplitude transformer, so that the high-speed vibration of the cutting tool and a workpiece in the cutting process is realized; the pulse power supply device is connected with the workpiece and provides pulse current for the workpiece.
2. The combined pulse current and ultrasonic auxiliary cutting device as claimed in claim 1, wherein the cutting tool and the ultrasonic horn are connected in an embedded manner, and are reinforced by bolts.
3. The combined pulse current and ultrasonic auxiliary cutting device as claimed in claim 2, wherein the sandwich piezoelectric transducer and the ultrasonic horn are fixed on a supporting frame by a hexagonal socket head screw.
4. The pulse current and ultrasonic combined auxiliary cutting machining device according to claim 1, wherein the pulse power supply device is composed of an oscilloscope and a pulse power supply; the pulse power supply is connected with the workpiece and used for providing pulse current for the workpiece, and the oscilloscope monitors the current and the voltage in the workpiece.
5. The combined pulse current and ultrasonic auxiliary cutting machining device according to claim 4, wherein a positive electrode of the pulse power supply is connected with the workpiece through a brush, and a negative electrode of the pulse power supply is connected with the workpiece through a resilient conductive support to form a closed loop.
6. The pulse current and ultrasonic composite auxiliary cutting device according to claim 5, wherein one end of the workpiece is held on a chuck of a lathe, and the chuck rotates the workpiece.
7. The pulse current and ultrasonic composite auxiliary cutting device according to claim 6, wherein the other end of the workpiece is held by a thimble of a lathe.
8. The pulse current and ultrasonic composite auxiliary cutting device according to claim 7, wherein an insulating member is interposed between the cutting tool and the ultrasonic horn, between the chuck and the workpiece, between the ejector pin and the lathe, and between the elastic conductive holder and the lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301723.XU CN210996506U (en) | 2019-08-12 | 2019-08-12 | Pulse current and ultrasonic composite auxiliary cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301723.XU CN210996506U (en) | 2019-08-12 | 2019-08-12 | Pulse current and ultrasonic composite auxiliary cutting device |
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| CN210996506U true CN210996506U (en) | 2020-07-14 |
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| CN201921301723.XU Active CN210996506U (en) | 2019-08-12 | 2019-08-12 | Pulse current and ultrasonic composite auxiliary cutting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480034A (en) * | 2019-08-12 | 2019-11-22 | 湖南科技大学 | A kind of pulse current and ULTRASONIC COMPLEX assisted machining processing unit (plant) and method |
| CN114535729A (en) * | 2022-01-28 | 2022-05-27 | 湖南科技大学 | Thin-wall cylinder inner support device, turning and milling composite processing device and processing method |
-
2019
- 2019-08-12 CN CN201921301723.XU patent/CN210996506U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480034A (en) * | 2019-08-12 | 2019-11-22 | 湖南科技大学 | A kind of pulse current and ULTRASONIC COMPLEX assisted machining processing unit (plant) and method |
| CN114535729A (en) * | 2022-01-28 | 2022-05-27 | 湖南科技大学 | Thin-wall cylinder inner support device, turning and milling composite processing device and processing method |
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