CN110064890B - Sound liquid solid coupling two-dimensional ultrasonic deep rolling processing device - Google Patents
Sound liquid solid coupling two-dimensional ultrasonic deep rolling processing device Download PDFInfo
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- CN110064890B CN110064890B CN201910436930.4A CN201910436930A CN110064890B CN 110064890 B CN110064890 B CN 110064890B CN 201910436930 A CN201910436930 A CN 201910436930A CN 110064890 B CN110064890 B CN 110064890B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
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Abstract
The invention discloses an acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device which at least comprises an acoustic assembly, a hydraulic assembly and a tool assembly; the tool assembly comprises a base provided with a base groove and a ball which is arranged in the base groove, can roll and can impact the surface of a workpiece; the acoustic assembly comprises an amplitude transformer, an ultrasonic transducer and an ultrasonic generator connected with the ultrasonic transducer through a lead, and the ultrasonic transducer is arranged on the amplitude transformer; the hydraulic assembly comprises a liquid supply pipeline arranged on the base, and the liquid supply pipeline is communicated with the base groove. The sound-liquid-solid coupling two-dimensional ultrasonic deep rolling processing device integrates the advantages of deep rolling processing and two-dimensional ultrasonic processing, utilizes ultrasonic impact, ultrasonic cavitation and jet polishing generated under the coupling action of a two-dimensional ultrasonic field and a flow field, and realizes high-quality and high-efficiency surface strengthening of a low-rigidity metal workpiece through the action of balls on the workpiece, and prolongs the service life of the balls.
Description
Technical Field
The invention relates to the technical field of surface strengthening of metal parts, in particular to an acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device.
Background
Metal parts are widely used in various mechanical equipment. Since metal parts are often damaged due to surface wear, corrosion, fatigue, etc., surface strengthening techniques such as rolling and shot blasting are usually required to improve the processing quality and surface mechanical properties of the metal parts, improve wear resistance, corrosion resistance, fatigue resistance, and prolong the service life of the metal parts.
Ultrasonic deep rolling is formed by combining rolling and ultrasonic machining, is one of surface strengthening treatment technologies, is developed by Bozdana on the basis of deep rolling in 2005, and adopts ultrahigh pressure fluid to enable balls to be in close contact with a workpiece, severe plastic deformation of the workpiece is mainly generated by ultrasonic impact of the balls, the balls do not rotate in the machining process, and no lubricating oil exists between the balls and the workpiece. The extrusion sliding friction between the ball and the workpiece easily causes the abrasion of the ball, and the processing quality of the workpiece is directly influenced.
At present, elastic components or a high-pressure fluid system used in deep rolling is adopted to provide static pressure in the ultrasonic deep rolling process instead of the deep rolling process, so that the ball keeps close contact with a workpiece, and the ball performs rolling friction and ultrasonic vibration impact on the surface of the workpiece. The severe plastic deformation of the workpiece during ultrasonic deep rolling is mainly generated by ultrasonic vibration impact of the balls on the workpiece, the static pressure of the workpiece is far lower than that of deep rolling, but deeper and larger residual pressure stress layers and hardened layers can be generated, the influence on the rigidity of a machine tool is reduced, and the method is more suitable for processing parts with poor rigidity, such as thin-walled parts, slender shafts, blades and the like. Similarly to cutting machining, it has also been studied to pour a cutting fluid into a machining area during ultrasonic deep rolling to improve the machining process. The ultrasonic deep rolling is a surface strengthening process caused by severe plastic deformation, and material flow generated when the ball rolls the surface of a workpiece can be adhered to the ball, so that the ball is abraded and scratches the surface of the workpiece, the processing quality of the workpiece is reduced, and the service life of the ball is prolonged.
In addition, in the early century, with the progress of ultrasonic processing technology research, researchers developed a two-dimensional ultrasonic rolling process, namely high-frequency loading in different directions is beneficial to simultaneously generating plastic deformation in different directions, the process of inducing surface nanocrystallization by severe plastic deformation is accelerated, the surface layer is more compact, and then the wear resistance, corrosion resistance and fatigue resistance are improved. The two-dimensional ultrasonic rolling process still has the defects.
Disclosure of Invention
Aiming at the surface strengthening treatment of parts with poor rigidity, such as thin-walled parts, slender shafts, blades and the like, the invention provides the acoustic-liquid-solid coupling two-dimensional ultrasonic deep rolling processing device integrating the advantages of deep rolling processing and two-dimensional ultrasonic processing.
In order to solve the technical problems, the invention adopts the following technical scheme:
an acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device at least comprises an acoustic assembly, a hydraulic assembly and a tool assembly which connects the acoustic assembly and the hydraulic assembly together; the tool assembly at least comprises a base provided with a base groove and a ball which is arranged in the spherical groove, can roll and can impact the surface of the workpiece; the acoustic assembly at least comprises an amplitude transformer, an ultrasonic transducer and an ultrasonic generator connected with the ultrasonic transducer through a lead, and the ultrasonic transducer is arranged on the amplitude transformer; the hydraulic assembly at least comprises a liquid supply pipeline arranged on the base, and a Laval nozzle structure is arranged at the communication end of the liquid supply pipeline and the groove of the base and is communicated with the groove of the base through the Laval nozzle structure.
As a further improvement to the above technical solution, the base groove is a spherical groove; the front end of the base is connected with a detachable fixed sleeve, and the end face of the fixed sleeve is provided with an inner groove for enabling the ball to protrude from the end face of the fixed sleeve; when the fixed sleeve is connected with the base, the inner groove of the fixed sleeve and the base groove of the base form a semi-surrounding structure, and the ball is positioned in the semi-surrounding structure formed by the fixed sleeve and the base and has a part of ball protruding from the end face of the fixed sleeve.
As a further improvement to the technical scheme, a plurality of arc-shaped deep grooves are uniformly distributed on the base groove. It can be guaranteed that liquid can flow out through the deep groove when the ball is in contact with the arc-shaped bottom of the groove of the base. The bottom end of the spherical groove is connected with a conical channel with the inner diameter increasing after decreasing, the tail end of the conical channel is connected with a unthreaded hole with the fixed inner diameter, namely a Laval nozzle structure, and the tail end of the unthreaded hole is provided with an internal thread for connecting an amplitude transformer.
As a further improvement to the above technical scheme, the number of the deep grooves is not less than 3.
As a further improvement to the above technical solution, the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing apparatus further comprises a cutting fluid system, the cutting fluid system at least comprises one spray header, and the water outlet direction of the spray header faces the convex part of the ball.
As a further improvement to the above technical solution, a first seal ring is arranged between the fixed sleeve and the base to form an end face seal between the fixed sleeve and the base, thereby preventing liquid from seeping out from the threaded connection; and a second sealing ring is arranged at the joint of the base and the amplitude transformer so that the base and the amplitude transformer form end surface sealing to prevent liquid from seeping out from the threaded joint.
As a further improvement to the above technical solution, the hydraulic assembly further includes a liquid inlet pipe and a hydraulic pump connected to the liquid inlet pipe, the other end of the liquid inlet pipe is connected to a liquid supply pipe junction of the base, and a fluid pressure indicator is disposed on the liquid inlet pipe.
As a further improvement to the technical scheme, a third sealing ring is arranged at the joint of the liquid inlet pipe and the intersection of the liquid supply pipe of the base so as to seal the end of the liquid inlet pipe and the base and prevent liquid from seeping out of the threaded joint.
As a further improvement to the above technical solution, the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device further comprises a clamp assembly, and the clamp assembly mainly comprises a first inner sleeve, a second inner sleeve, an outer sleeve, a spring, a rear end cover and a clamping block. The spring is arranged between the first inner sleeve and the second inner sleeve, the first inner sleeve is in jacking fit with the flange plate on the amplitude transformer, and the second inner sleeve is in jacking fit with the bottom of the rear end cover. The outer sleeve is connected with the rear end cover through threads, the bottom surface of the outer sleeve is in top-pressing fit with a flange plate on the amplitude transformer, and a clamping block is fixed on the outer wall of the outer sleeve and is installed on a tool rest of a machine tool.
As a further improvement to the technical scheme, the first inner sleeve, the second inner sleeve, the outer sleeve and the rear end cover of the clamp assembly are provided with heat dissipation holes, and the center of the bottom of the rear end cover is provided with a hole through which a lead can pass.
As a further improvement to the above technical solution, the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device further comprises a static pressure measurement system, and the static pressure measurement system comprises a pressure sensor, a dynamometer and a dynamometer fixing mechanism. The pressure sensor passes through the outer sleeve of the clamp assembly and is in threaded connection with the first inner sleeve. The dynamometer is fixed on the outer wall of the outer sleeve through a dynamometer fixing mechanism, and a thimble of the dynamometer is pressed against the pressure sensor.
Compared with the prior art, the invention has the following beneficial effects:
according to the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device, when processing is carried out, high-pressure fluid provided by the hydraulic assembly can enable the balls to roll the surface of a workpiece in a nearly frictionless manner. Ultrasonic cavitation generated in a proper flow field not only scours the surface of the ball to avoid chip adhesion, but also can further strengthen the surface layer of the workpiece, and cavitation jet polishing and fluid lubrication are beneficial to improving the surface quality. Therefore, the high-pressure cutting fluid and the two-dimensional ultrasonic machining are introduced into the deep rolling process, the machining quality of workpieces and the service life of balls can be improved, the strengthening treatment on parts with poor rigidity, such as thin-walled parts, slender shafts, blades and the like, can be facilitated, the wear resistance, corrosion resistance and fatigue resistance of the parts can be improved, and the service life of the parts can be prolonged.
The sound-liquid-solid coupling two-dimensional ultrasonic deep rolling processing device integrates the advantages of deep rolling processing and two-dimensional ultrasonic processing, utilizes ultrasonic impact, ultrasonic cavitation and jet polishing generated under the coupling action of a two-dimensional ultrasonic field and a flow field, and realizes high-quality and high-efficiency surface strengthening of a low-rigidity metal workpiece through the action of balls on the workpiece, and prolongs the service life of the balls.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic overall sectional view of the present invention;
FIG. 2 is a cross-sectional structural schematic of the tool assembly;
FIG. 3 is a cross-sectional structural schematic of the tool assembly of the present invention;
fig. 4 is an overall installation schematic of the present invention.
Reference numerals: 1. a ball bearing; 2. fixing a sleeve; 3. a base; 4. a first seal ring; 5. a second seal ring; 6. deep grooves; 7. an amplitude transformer; 8. an ultrasonic transducer; 9. an ultrasonic generator; 10. a pipe joint; 11. a fluid pressure indicator; 12. a fluid pipe; 13. a hydraulic pump; 14. a third seal ring; 15. a first inner sleeve; 16. a second inner sleeve; 17. an outer sleeve; 18. a spring; 19. a rear end cap; 20. a clamping block; 21. a flange plate; 22. a pressure sensor; 23. a force gauge; 24. a dynamometer fixing mechanism; 25. a stud bolt; 26. a wiring terminal; 27. a wire; 28. an aperture; 29. workpiece, 30, spray header.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The singular is also intended to include the plural unless the context clearly dictates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.
The shapes of the illustrations as a result of manufacturing techniques and/or tolerances may vary. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include variations in shapes that occur during manufacturing.
Next, examples are described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 4, the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device mainly comprises a tool assembly, an acoustic assembly, a hydraulic assembly, a clamp assembly and a static pressure measuring system.
Referring to fig. 1 and 3, the tool assembly mainly comprises a ball 1, a fixed sleeve 2, a base 3, a first seal ring 4 and a second seal ring 5; the ball 1 is an acting element for carrying out ultrasonic frequency impact on the workpiece 29, and the ball 1 is placed in a base groove of the base 3 and can freely rotate in the base groove; the fixed sleeve 2 is connected with the base 3 through threads and is in top pressure fit with the base 3 to limit the movement of the ball 1 together, and the first sealing ring 4 between the fixed sleeve 2 and the base 3 prevents liquid from seeping out of the threaded connection; four arc-shaped deep grooves 6 are uniformly distributed on the base groove, so that liquid can flow out through the deep grooves 6 when the ball 1 is in contact with the bottom of the base groove; and a Laval nozzle structure is arranged at the communication end of the liquid supply pipeline and the groove of the base. Namely, the bottom end of the base groove is connected with a conical channel with the inner diameter increasing after decreasing, the tail end of the conical channel is connected with a unthreaded hole with the fixed inner diameter, and the tail end of the unthreaded hole is provided with an internal thread for connecting an amplitude transformer.
A cylindrical unthreaded hole communicated with a base groove is formed in the center of the base 3, a threaded hole is formed in the side wall of the cylindrical unthreaded hole of the base 3 and communicated with the cylindrical unthreaded hole, a pipe joint 10 of the hydraulic assembly is connected to the threaded hole of the base 3 and communicated with the threaded hole, and a third sealing ring 14 is placed at the bottom of the threaded hole; the surface of the base 3 in abutting and pressing fit with the fixed sleeve 2 is provided with an annular groove, a first sealing ring 4 is arranged in the annular groove, the center of the fixed sleeve 2 is provided with a horn hole in clearance fit with the ball 1, the surface of the base 3 in abutting and pressing fit with the small end of the amplitude transformer 7 is provided with an annular groove, and a second sealing ring 5 is arranged in the annular groove.
As shown in the figure, the acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device further comprises a cooling cutting fluid system, the cooling cutting fluid system at least comprises one spray header 30, and the water outlet direction of the spray header 30 faces the convex part of the ball 1.
Referring to fig. 1, 3 and 4, the acoustic assembly includes an amplitude transformer 7, an ultrasonic transducer 8, an ultrasonic generator 9, and the like; the small end of the amplitude transformer 7 is connected with the internal thread on the base 3 of the tool assembly through threads and is in top-pressing fit with the internal thread, the amplitude transformer 7 is fixedly connected with the base 3 through threads and is sealed by a second sealing ring 5, and liquid is prevented from seeping out of the threaded connection; the large end of the amplitude transformer 7 of the acoustic assembly is in threaded connection and is in top-pressing fit with the end face of the ultrasonic transducer 8 through a stud 25, the amplitude transformer 7 can convert longitudinal vibration output by the ultrasonic transducer 8 into two-dimensional ultrasonic vibration, and the ultrasonic transducer 8 is provided with a wiring terminal 26 and is connected with the ultrasonic generator 9 through a lead 27. The ultrasonic generator 9 is connected with a terminal 26 on the ultrasonic transducer 8 through a lead 27.
Referring to fig. 1 and 4, the hydraulic assembly is mainly composed of a fluid pressure indicator 11, a fluid pipe 12, and a hydraulic pump 13. One end of the fluid pressure indicator 11 is connected with the base 3 through threads, and a third sealing ring 14 is arranged at the joint; the other end of the fluid pressure indicator 11 is connected to a fluid pipe 12, and the fluid pipe 12 is connected to a hydraulic pump 13. The hydraulic pump 13 feeds high pressure fluid through a fluid line 12 and through a flow pressure indicator 11 into the base 3 of the tool assembly, the external threads of the coupling 12 being threadably engaged with internally threaded bores in the side of the base 3 of the tool assembly. It should be noted that the liquid inlet pipe mentioned in the disclosure of the present invention is a generic term for the liquid pipe 12 and the pipe joint 10.
Referring to fig. 1, 3 and 4, the clamp assembly generally comprises a first inner sleeve 15, a second inner sleeve 16, an outer sleeve 17, a spring 18, a rear end cap 19 and a clamp block 20; the first inner sleeve 15, the second inner sleeve 16 and the outer sleeve 17 are in clearance fit, the spring 18 is arranged between the first inner sleeve 15 and the second inner sleeve 16, the first inner sleeve 15 is in top-pressing fit with the flange 21 on the amplitude transformer 7, and the second inner sleeve 16 is in top-pressing fit with the bottom of the rear end cover 19; the outer sleeve 17 is connected with the rear end cover 19 through threads, the bottom surface of the outer sleeve 17 is in press fit with a flange 21 on the amplitude transformer 7, a clamping block 20 is welded on the outer wall of the outer sleeve 17, and the clamping block 20 is installed on a tool rest of a machine tool; the first inner sleeve 15, the second inner sleeve 16, the outer sleeve 17 and the rear end cover 19 of the clamp assembly are provided with heat dissipation holes, and the center of the bottom of the rear end cover 19 is provided with a hole 28 through which a lead 27 can pass.
Referring to fig. 1, 3 and 4, the static pressure measurement system includes a pressure sensor 22, a load cell 23 and a load cell fixing mechanism 24. The pressure sensor 22 passes through the outer sleeve 17 of the clamp assembly and is threadedly connected to the first inner sleeve 15. A load cell 23 is fixed to the outer wall of the outer sleeve 17 by a load cell fixing mechanism 24, and a thimble of the load cell 23 is pressed against the pressure sensor 22.
Referring to fig. 1 to 4, the device is mounted on a tool post of a machine tool through a clamping block 20 on an outer sleeve 17, and a ball 1 is used for surface strengthening treatment on a workpiece instead of a tool; the clamping block 20 is arranged on a tool rest of the machine tool and ensures that the axial lead of the amplitude transformer 7 is radially vertical to the workpiece 29 and is on the same horizontal plane; starting the machine tool to rotate the workpiece 29 at a set rotation speed; starting a machine tool liquid supply system to supply liquid to the convex part of the ball, starting a hydraulic pump 13 to supply liquid to the tool assembly under set pressure, and enabling the ball 1 to be in close contact with the fixed sleeve 2; after the tool rest is moved to make the ball 1 contact with the workpiece 29, the pointer of the fluid pressure indicator 11 is shifted; continuously moving the tool rest to enable the ball 1 to be in contact with the base 3, and stopping moving the tool rest when the pointer of the fluid pressure indicator 11 does not deviate any more; starting the ultrasonic generator 9, and enabling the ball to generate two-dimensional ultrasonic vibration; moving the tool post again to feed the workpiece 29 slowly until the reading of the dynamometer 23 reaches the set static pressure value; starting the feeding motion of the machine tool, starting to process the workpiece 29 according to the set feeding speed, and after the processing is finished, closing the ultrasonic generator 9 and closing the hydraulic pump 13.
Ultrasonic vibration generated by the acoustic assembly is transmitted into the tool assembly, so that the ball impacts the workpiece at ultrasonic frequency, and the purposes of reducing the surface roughness of the workpiece and increasing the residual stress of the surface layer are achieved. The tool assembly is in threaded connection with the acoustic assembly, the tool assembly can be directly replaced after being damaged, and meanwhile, the ball can be replaced after the fixed sleeve is unscrewed, so that the universality of the whole device is realized.
Ultrasonic cavitation refers to that under the action of ultrasonic pressure waves, the average distance between liquid phase molecules changes along with the continuous vibration of the molecules, when liquid is in a negative pressure half period of ultrasonic alternating sound pressure, under the action of negative pressure with enough pressure intensity, the attractive force between the liquid phase molecules is broken, and when the distance between the molecules exceeds the critical molecular distance of a substance in a liquid state, the liquid is broken to generate a cavity, and a cavitation nucleus is formed. Thereafter, the cavitation nuclei in the sound field continuously absorb energy, and the processes of vibration, expansion, contraction, and finally burst collapse occur. In the cavitation process, the energy gathered by the cavitation nuclei is rapidly released, and extreme physical conditions of high temperature of more than 5000K, high pressure of more than 100MPa, shock waves, microjets and the like are generated in a micro space where cavitation occurs.
In the invention, the hydraulic assembly provides high-pressure impact to the ball in the tool assembly, and when high-pressure liquid flows out from the Laval nozzle structural channel and the arc-shaped deep groove, the liquid can be further accelerated to wash the ball. Meanwhile, the liquid forms a cavitation effect in the area around the ball under the action of ultrasonic waves. In the ultrasonic cavitation process, the energy gathered by the cavitation nuclei is rapidly released, high temperature of more than 5000K and high pressure of more than 100MPa, shock waves and microjets are generated in a micro space where cavitation occurs, the surface strengthening effect of a workpiece can be further improved, the phenomena of blockage and adhesion can be avoided due to the fact that the balls are washed away, and the service life of the balls is greatly prolonged (the cavitation effects in different areas are different in functions).
The action of the cutting fluid system is similar to that of the hydraulic assembly, and the water outlet direction of the spray head faces to the convex part of the ball. The cutting fluid forms a cavitation effect in the area around the ball under the action of ultrasonic waves. In the ultrasonic cavitation process, the energy gathered by the cavitation nuclei is rapidly released, high temperature of more than 5000K, high pressure of more than 100MPa, shock wave and microjet are generated in a tiny space where cavitation occurs, the surface strengthening effect of the workpiece can be further improved, the phenomena of blockage and adhesion can be avoided due to the fact that the balls are washed away, and the service life of the balls is greatly prolonged.
The water flow pressure indicator in the hydraulic assembly can effectively monitor the contact condition of the rolling head and the workpiece. Before a workpiece is machined, under the condition that only the hydraulic assembly is started, when the ball is not in contact with the workpiece, the ball is in close contact with a fixed sleeve thereof under the action of hydraulic pressure, and the pressure of the water flow pressure indicator is constant and shows that no liquid flows; when the ball is in contact with a workpiece, the water flow pressure indicator displays that the pressure is increased after being reduced, and finally the pressure is kept constant; when the ball is just completely contacted with the workpiece through the hydraulic assembly, the whole device is driven to slowly feed to the workpiece by a tool rest of the machine tool continuously, the spring is gradually compressed, and the static pressure provided by the spring is displayed through a dynamometer of a static pressure measuring system.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
Claims (10)
1. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling machining device is characterized by at least comprising an acoustic assembly, a hydraulic assembly and a tool assembly for connecting the acoustic assembly and the hydraulic assembly together; the tool assembly at least comprises a base provided with a base groove and a ball which is arranged in the groove, can roll and can impact the surface of a workpiece; the acoustic assembly at least comprises an amplitude transformer, an ultrasonic transducer and an ultrasonic generator connected with the ultrasonic transducer through a lead, and the ultrasonic transducer is arranged on the amplitude transformer; the hydraulic assembly at least comprises a liquid supply pipeline arranged on the base, a Laval nozzle structure is arranged at the communication end of the liquid supply pipeline and the groove of the base and is communicated with the groove of the base through the Laval nozzle structure, and high-pressure fluid provided by the hydraulic assembly can enable the ball to roll the surface of the workpiece without friction.
2. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device according to claim 1, wherein the base groove is a spherical groove; the front end of the base is connected with a detachable fixed sleeve, and the end face of the fixed sleeve is provided with an inner groove for enabling the ball to protrude from the end face of the fixed sleeve; when the fixed sleeve is connected with the base, the inner groove of the fixed sleeve and the base groove of the base form a semi-surrounding structure, and the ball is positioned in the semi-surrounding structure formed by the fixed sleeve and the base and has a part of ball protruding from the end face of the fixed sleeve.
3. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device according to claim 2, wherein a plurality of arc-shaped deep grooves are uniformly distributed on the groove of the base.
4. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device according to claim 1, further comprising a cutting fluid system, wherein the cutting fluid system comprises at least one spray header, and the water outlet direction of the spray header faces the convex part of the ball.
5. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device as claimed in claim 2, wherein a first seal ring is arranged between the fixing sleeve and the base to enable the fixing sleeve and the base to form end face seal; and a second sealing ring is arranged at the joint of the base and the amplitude transformer so as to enable the base and the amplitude transformer to form end face sealing.
6. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device according to claim 2, wherein the hydraulic assembly further comprises a liquid inlet pipe and a hydraulic pump connected with the liquid inlet pipe, the other end of the liquid inlet pipe is connected to a liquid supply pipe port of the base, and a fluid pressure indicator is arranged on the liquid inlet pipe.
7. The acoustic liquid-solid coupling two-dimensional ultrasonic deep rolling processing device as claimed in claim 6, wherein a third sealing ring is arranged at the junction of the liquid inlet pipe and the liquid supply pipe mouth of the base so as to seal the end of the liquid inlet pipe and the base.
8. The acoustic liquid-solid coupled two-dimensional ultrasonic deep rolling processing device according to claim 2, further comprising a clamp assembly including a first inner sleeve, a second inner sleeve, an outer sleeve, a spring, a rear end cap, and a clamping block; the spring is arranged between the first inner sleeve and the second inner sleeve, the first inner sleeve is in top-pressing fit with the flange plate on the amplitude transformer, and the second inner sleeve is in top-pressing fit with the bottom of the rear end cover; the outer sleeve is in threaded connection with the rear end cover, the bottom surface of the outer sleeve is in press fit with a flange plate on the amplitude transformer, and the outer wall of the outer sleeve is welded with a clamping block which is arranged on a tool rest of a machine tool.
9. The acoustic liquid solid coupling two-dimensional ultrasonic deep rolling processing device according to claim 8, wherein heat dissipation holes are formed in the first inner sleeve, the second inner sleeve, the outer sleeve and the rear end cover of the clamp assembly, and a hole capable of passing through a wire is formed in the center of the bottom of the rear end cover.
10. The acoustic liquid-solid coupled two-dimensional ultrasonic deep rolling device of claim 8, further comprising a static pressure measurement system comprising a pressure sensor, a dynamometer and a dynamometer fixation mechanism; the pressure sensor penetrates through the outer sleeve of the clamp assembly and is connected with the first inner sleeve through threads; the dynamometer is fixed on the outer wall of the outer sleeve through a dynamometer fixing mechanism, and a thimble of the dynamometer is pressed against the pressure sensor.
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| CN112609053B (en) * | 2020-12-11 | 2022-12-16 | 华东理工大学 | Ultrasonic rolling strengthening device and system based on jet flow assistance |
| CN114799728B (en) * | 2022-05-19 | 2023-08-22 | 南京理工大学 | Preparation system and method of aluminum alloy with three-dimensional space gradient structure |
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