Pipe type cavity bidirectional flow composite high-frequency vibration finishing machining device and machining method

Abstract

The invention discloses a bidirectional flow composite high-frequency vibration finishing machining device and method for a pipe type cavity, and belongs to the technical field of finishing machining of pipe type cavity parts. A bidirectional flow composite high-frequency vibration finishing machining device for a pipe type cavity comprises a vibration mechanism, a tool clamp is arranged on the vibration mechanism, and a bidirectional flow mechanism is arranged on one side of the vibration mechanism. The bidirectional flow mechanism comprises a first grinding block medium bottle and a second grinding block medium bottle, the first grinding block medium bottle and the second grinding block medium bottle are filled with grinding block media, the first grinding block medium bottle is connected with one end of the cavity in the workpiece through a first connecting pipe, and the second grinding block medium bottle is connected with the other end of the cavity in the workpiece through a second connecting pipe; and a circulating pump is arranged on the first connecting pipe or the second connecting pipe. By adopting the bidirectional flow composite high-frequency vibration finishing machining device and method for the pipe type cavity, the problems that the polishing and grinding quality of an inner cavity of an existing pipe type cavity part is poor, and a grinding block is prone to remaining in the inner cavity can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of finishing machining of tube-shaped cavity parts, and particularly to a two-way flow composite high-frequency vibration finishing machining device and method for tube-shaped cavities. Background Art

[0002] Tube-shaped cavity parts are widely used in application fields such as aeroengines and ships. Therefore, the surface quality of their inner cavities has a crucial impact on the combustion effect, service life, and safety and reliability of aeroengines. The structures of tube-shaped cavity parts have a common characteristic that the inner cavity structures are complex and the space is narrow, which also increases the difficulty coefficient of finishing the inner cavities. At present, for the inner cavity surface machining of traditional tube-shaped cavity parts, abrasive block media are manually injected from the oil inlet of the part, the oil outlet is blocked, a certain proportion of abrasive block media is injected, and rough grinding of the abrasive block media on the inner cavity surface is achieved through vibration. However, for aeroengine tube-shaped cavity parts, their structures are relatively complex and the inner cavity volumes are small, resulting in that ordinary abrasive block media cannot be poured into the inner cavities of tube-shaped cavities, and even the abrasive block media added to the inner cavities of tube-shaped cavities are not easy to clean out, making it difficult to ensure the inner cavity polishing quality. Therefore, there is an urgent need to develop an inner cavity polishing and finishing method for aeroengine tube-shaped cavity characteristic parts. Summary of the Invention

[0003] The purpose of the present invention is to provide a two-way flow composite high-frequency vibration finishing machining device and method for tube-shaped cavities, so as to solve the problems of poor inner cavity polishing quality of existing tube-shaped cavity parts and easy residue of abrasive blocks in the inner cavities.

[0004] To achieve the above purpose, the present invention provides a two-way flow composite high-frequency vibration finishing machining device for tube-shaped cavities, including: A vibration mechanism for providing an exciting force for finishing machining of the workpiece; A tooling fixture arranged on the vibration mechanism for clamping the workpiece; A two-way flow mechanism arranged on one side of the vibration mechanism for finishing machining of the workpiece; the two-way flow mechanism includes a first abrasive block medium bottle and a second abrasive block medium bottle, the first abrasive block medium bottle and the second abrasive block medium bottle are filled with abrasive block media, the first abrasive block medium bottle is connected to one end of the internal cavity of the workpiece through a first connecting pipe, the second abrasive block medium bottle is connected to the other end of the internal cavity of the workpiece through a second connecting pipe, and a circulation pump is arranged on the first connecting pipe or the second connecting pipe.

[0005] Preferably, the abrasive block medium is a non-Newtonian fluid liquid medium; the circulation pump is a peristaltic pump, the peristaltic pump is arranged on the second connecting pipe, and the peristaltic pump, the first abrasive block medium bottle, and the second abrasive block medium bottle are all arranged on a support table.

[0006] Preferably, the vibration mechanism includes a main body, a back plate is arranged on one side of the main body, the back plate is rotatably connected to the main body, a support frame is arranged on the back plate, a tooling fixture is arranged on the support frame, the tooling fixture is rotatably connected to the support frame, and the rotation axis of the support frame is perpendicular to the rotation axis of the back plate.

[0007] Preferably, the main body includes a rear vibration body and a front vibration body, the front vibration body and the rear vibration body are connected by a plurality of elastic members, the back plate is rotatably arranged on the front vibration body, and an excitation motor for driving the rear vibration body to vibrate is arranged on the rear vibration body.

[0008] Preferably, two excitation motors are provided, the two excitation motors are symmetrically arranged on both sides of the rear vibration body, and the rotation directions of the two excitation motors are opposite to cancel the excitation force in the vertical direction of the rear vibration body.

[0009] Preferably, the tooling fixture includes a cushion block, the cushion block is fixed on the mounting plate, the mounting plate is rotatably arranged on the support frame, a groove for placing the workpiece is arranged at the center of the cushion block; a limiting block is arranged on the mounting plate, the limiting block is located on one side of the cushion block, and the limiting block limits one side of the workpiece; a pressing plate is arranged above the cushion block, a pressing block for pressing the workpiece is arranged on the pressing plate, and the pressing plate is fixedly connected to the mounting plate.

[0010] Preferably, a pipe hole for facilitating the pipeline arrangement of the two-way flow mechanism is arranged in the groove of the cushion block, a long slot hole is arranged on the limiting block, and the limiting block is fixedly connected to the mounting plate through a bolt and the long slot hole. The end of the limiting block close to the workpiece is a limiting surface adapted to the shape of the workpiece; An installation groove is arranged on the lower surface of the pressing plate, the pressing block is arranged in the installation groove, a first connection hole is arranged on the pressing block, a second connection hole is arranged on the pressing plate, and the first connection hole and the second connection hole are reserved holes for facilitating the pipeline arrangement of the two-way flow mechanism; a plurality of fixing holes are arranged on the pressing plate, and the pressing plate is fixedly connected to the mounting plate through the fixing holes and bolts.

[0011] A processing method of a two-way flow composite high-frequency vibration finishing machining device based on the above pipe type cavity includes the following steps: S1. Place the workpiece in the groove of the cushion block, adjust the position of the limiting block so that the limiting surface contacts the surface of the workpiece, and fix the limiting block on the mounting plate through bolts; fix the pressing block on the pressing plate through bolts, place the pressing plate above the workpiece, and the pressing block presses on the top of the workpiece; S2. Insert one end of the first connecting pipe into the first grinding block medium bottle, connect the other end of the first connecting pipe to the joint at one end of the workpiece, connect a circulating pump to the second connecting pipe, insert one end of the second connecting pipe into the second grinding block medium bottle, and connect the other end of the second connecting pipe to the joint at the other end of the workpiece; S3. Start the circulation pump. The circulation pump rotates forward, driving the abrasive medium of the non-Newtonian fluid in the first abrasive block medium bottle to enter the workpiece through the first connecting pipe, and then flowing into the second abrasive block medium bottle through the second connecting pipe. After the abrasive medium in the second connecting pipe flows out evenly, start the vibration exciter motor. Under the inertia of the eccentric block, the vibration exciter motor drives the rear vibration body to vibrate. The rear vibration body drives the front vibration body to vibrate through the elastic member, and the front vibration body drives the tooling fixture and the workpiece to vibrate through the back plate and the support frame, and the inner cavity of the workpiece is polished by the abrasive medium. S4. After reaching the set polishing time, the vibration exciter motor stops vibrating. The circulation pump rotates reversely, and the fluid in the second abrasive block medium bottle enters the workpiece through the second connecting pipe, and then returns to the first abrasive block medium bottle through the first connecting pipe, driving the abrasive medium to flow reversely inside the workpiece. Start the vibration exciter motor, and the vibration mechanism vibrates the workpiece to perform abrasive finishing on the workpiece. After reaching the set polishing time, the vibration exciter motor stops.

[0012] Preferably, after S4, it further includes: S5. Rotate the back plate, and the back plate drives the workpiece to change its posture through the support frame, and repeat S3 - S4; S6. Rotate the mounting plate to adjust the posture of the workpiece through the mounting plate, and repeat S3 - S4; S7. Repeat S5 - S6 to complete the abrasive finishing of the workpiece, and disconnect the first connecting pipe and the second connecting pipe from the workpiece joint; S8. Perform ultrasonic cleaning on the workpiece, and store it after drying.

[0013] Preferably, the vibration excitation frequency of the back plate is 38 Hz - 45 Hz, and the amplitude is 1.5 mm - 3 mm.

[0014] The advantages and positive effects of the tube - type cavity two - way flow composite high - frequency vibration finishing device and processing method of the present invention are: 1. During the process of the abrasive medium flowing inside the workpiece, the inner cavity of the workpiece is polished. Since the abrasive medium flows and polishes inside the workpiece, it is beneficial to reduce the residue of the abrasive medium in the inner cavity of the workpiece, improve the uniformity of the processing of the inner cavity of the workpiece, and improve the polishing effect of the workpiece.

[0015] 2. The abrasive medium is a non - Newtonian fluid liquid medium. Under the action of the circulation pump and the vibration mechanism, the abrasive medium generates vibration and periodic pulse pressure, improving the material removal rate. It can also make the cutting direction of the abrasive block random, eliminate directional texture, and improve the processing uniformity. And it can penetrate into complex inner cavities and act evenly on the surface of the workpiece to achieve comprehensive and uniform finishing of the inner cavity of the workpiece.

[0016] 3. The tooling fixture and the backplane can adjust the workpiece posture in the Y-axis and Z-axis directions. Through the multi-dimensional vibration of the grinding block medium flowing bidirectionally inside the cavity of the pipe type, the finishing device can better adapt to the finishing of workpieces with complex inner cavities, improving the machining effect of the workpieces.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 It is a top view structural schematic diagram of an embodiment of the present invention; Figure 3 It is a schematic diagram of the vibration principle of the vibration mechanism in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the tooling fixture in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of the spacer block in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the limit block in an embodiment of the present invention; Figure 7 It is a structural schematic diagram of the pressure block in an embodiment of the present invention; Figure 8 It is a structural schematic diagram of the pressing plate in an embodiment of the present invention; Figure 9 It is a structural schematic diagram of the workpiece posture adjustment in an embodiment of the present invention.

[0019] Reference Signs 1. Vibration mechanism; 11. Body; 12. Backplane; 13. Support frame; 14. Mounting plate; 15. Eccentric block; 16. Rear vibration body; 17. Front vibration body; 18. Elastic member; 2. Tooling fixture; 21. Spacer block; 22. Limit block; 23. Pressure block; 24. Pressing plate, 25. Groove; 26. Pipe hole; 27. Limiting surface; 28. Long slot hole; 29. First connection hole; 210. Mounting groove; 211. Second connection hole; 212. Fixing hole; 3. Bidirectional flow mechanism; 31. Support platform; 32. First grinding block medium bottle; 33. First connecting pipe; 34. Second connecting pipe; 35. Circulation pump; 36. Second grinding block medium bottle; 4. Workpiece. Detailed Embodiments

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. In case of inconsistency, the meaning described in this specification or the meaning obtained according to the content recorded in this specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0022] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings.

[0023] As Figure 1 、 Figure 2 、 Figure 9 shown. The tube-type cavity two-way flow composite high-frequency vibration finishing machining device includes: A vibration mechanism 1 for providing vibration for finishing the workpiece 4.

[0024] A tooling fixture 2 is arranged on the vibration mechanism 1 and is used for clamping the workpiece 4.

[0025] A two-way flow mechanism 3 is arranged on one side of the vibration mechanism 1 and is used for finishing the workpiece 4.

[0026] The bidirectional flow mechanism 3 includes a first abrasive medium bottle 32 and a second abrasive medium bottle 36, and the first abrasive medium bottle 32 and the second abrasive medium bottle 36 are filled with abrasive medium. The first abrasive medium bottle 32 is connected to one end of the internal cavity of the workpiece 4 through a first connecting pipe 33, and the second abrasive medium bottle 36 is connected to the other end of the internal cavity of the workpiece 4 through a second connecting pipe 34. A circulating pump 35 is provided on the first connecting pipe 33 or the second connecting pipe 34. Under the action of the forward and reverse rotation of the circulating pump 35, the abrasive medium flows forward and backward in the internal cavity of the workpiece 4. During the flow of the abrasive medium in the workpiece 4, the internal cavity of the workpiece 4 is polished and finished. Since the abrasive medium flows and polishes in the workpiece 4, it is beneficial to reduce the residue of the abrasive medium in the internal cavity of the workpiece 4, and improve the uniformity of the processing of the internal cavity of the workpiece 4, and improve the polishing effect of the workpiece 4.

[0027] The grinding block medium is a non-Newtonian fluid liquid medium. The non-Newtonian fluid grinding block medium has softness and fluidity, can easily fit the processing surface of any shape, penetrate into complex inner cavities, and achieve comprehensive finishing. Under the action of the circulating pump 35, the abrasive particles in the grinding block medium can act evenly on the surface of the workpiece 4, achieve trace and uniform material removal, and improve the finishing effect of the workpiece 4. The shear-thinning characteristics of the non-Newtonian fluid grinding block medium reduce the viscosity of the fluid under pressure, enhance fluidity, and make it easier to enter the fine structure of the workpiece 4 for processing, thereby improving the finishing effect of the workpiece 4. Under the action of the circulating pump 35 and the vibration mechanism 1, the grinding block medium generates vibration and periodic pulse pressure, which improves the material removal rate, and can also make the cutting direction of the grinding block random, eliminate directional textures, and improve processing uniformity.

[0028] The circulation pump 35 is a peristaltic pump, and the circulation pump 35 is arranged on the second connecting pipe 34. The peristaltic pump, the first grinding block medium bottle 32 and the second grinding block medium bottle 36 are all arranged on the support platform 31.

[0029] like Figure 3 As shown. The vibration mechanism 1 includes a main body 11, and a back plate 12 is provided on one side of the main body 11. The back plate 12 is rotatably connected to the main body 11 and is used to adjust the posture of the workpiece 4. A support frame 13 is fixedly provided on the back plate 12, and the support frame 13 and the back plate 12 can be fixedly connected by bolts, which is convenient for the installation and disassembly of the support frame 13. The fixture 2 is provided on the support frame 13, and the fixture 2 is rotatably connected to the support frame 13. The rotation axis of the support frame 13 is perpendicular to the rotation axis of the back plate 12. The posture of the workpiece 4 can be adjusted in the Y-axis and Z-axis directions through the fixture 2 and the back plate 12, so that the finishing processing device can better adapt to the finishing processing of complex inner cavity workpieces 4 and improve the processing effect of the workpiece 4.

[0030] The main body 11 includes a rear vibrating body 16 and a front vibrating body 17, and the front vibrating body 17 and the rear vibrating body 16 are connected by a plurality of elastic members 18. The elastic members 18 can be springs. The back plate 12 is rotatably arranged on the front vibrating body 17 through a bearing, and a setscrew for locking the back plate 12 and the front vibrating body 17 is arranged on the back plate 12. The back plate is fixed by the setscrew to fix the workpiece 4 after attitude adjustment. An excitation motor for driving the rear vibrating body 16 to vibrate is fixedly arranged on the rear vibrating body 16. There are two excitation motors, and the two excitation motors are symmetrically arranged on both sides of the rear vibrating body 16. The rotation directions of the two excitation motors are opposite to cancel the excitation force in the vertical direction of the rear vibrating body 16, so that the rear vibrating body 16 mainly vibrates in the horizontal direction.

[0031] An eccentric block 15 is fixedly arranged on the output shaft of the excitation motor. The excitation motor is driven to vibrate by the inertial force during the rotation of the eccentric block 15, and the excitation motor drives the rear vibrating body 16 to vibrate. The rear vibrating body 16 is arranged on a base, the base is fixed on the ground, and the rear vibrating body 16 and the base are connected by a shock pad.

[0032] As Figure 4 shown. The tooling fixture 2 includes a cushion block 21, and the cushion block 21 is fixed on the mounting plate 14. The mounting plate 14 is rotatably arranged on the support frame 13 through a bearing. The workpiece 4 is driven by the mounting plate 14 to rotate along the Z axis, so as to adjust the attitude of the workpiece 4. A limit block 22 is arranged on the mounting plate 14. The limit block 22 is located on one side of the cushion block 21, and the limit block 22 limits one side of the workpiece 4. A pressing plate 24 is arranged above the cushion block 21, a pressing block 23 for pressing the workpiece 4 is arranged on the pressing plate 24, and the pressing plate 24 is fixedly connected with the mounting plate 14.

[0033] As Figure 5 、 Figure 6 shown. A groove 25 for placing the workpiece 4 is arranged at the center of the cushion block 21, and the groove 25 is adapted to the shape of the bottom of the workpiece 4. A pipe hole 26 is arranged in the groove 25 to facilitate the arrangement of the pipeline of the two-way flow mechanism 3. A long slot hole 28 is arranged on the limit block 22, and the limit block 22 is fixedly connected with the mounting plate 14 through a bolt and the long slot hole 28. One end of the limit block 22 close to the workpiece 4 is a limit surface 27 adapted to the shape of the workpiece 4.

[0034] As Figure 7 、 Figure 8 shown. An installation groove 210 is arranged on the lower surface of the pressing plate 24, and the pressing block 23 is arranged in the installation groove 210. A first connection hole 29 is arranged on the pressing block 23, a second connection hole 211 is arranged on the pressing plate 24, and the first connection hole 29 and the second connection hole 211 are reserved holes for facilitating the arrangement of the pipeline of the two-way flow mechanism 3. A plurality of fixing holes 212 are arranged on the pressing plate 24, and the pressing plate 24 is fixedly connected with the mounting plate 14 through the fixing holes 212 and bolts.

[0035] The spacer block 21, the limit block 22, and the pressing block 23 are made of nylon with a low elastic modulus, which protects the surface of the workpiece 4 while fixing the workpiece 4. The mounting plate 14 and the pressing plate 24 are made of rigid carbon steel to improve the supporting and pressing effects on the workpiece 4.

[0036] Based on the processing method of the above-mentioned tube-type cavity bidirectional flow composite high-frequency vibration finishing device, it includes the following steps: S1. Place the workpiece 4 in the groove 25 of the spacer block 21; adjust the position of the limit block 22 so that the limiting surface 27 contacts the surface of the workpiece 4, and fix the limit block 22 on the mounting plate 14 through bolts; fix the pressing block 23 on the pressing plate 24 through bolts, place the pressing plate 24 above the workpiece 4, and the pressing block 23 presses on the top of the workpiece 4.

[0037] S2. Insert one end of the first connecting pipe 33 into the first abrasive block medium bottle 32, connect the other end of the first connecting pipe 33 to the joint at one end of the workpiece 4, connect a circulating pump 35 to the second connecting pipe 34, insert one end of the second connecting pipe 34 into the second abrasive block medium bottle 36, and connect the other end of the second connecting pipe 34 to the joint at the other end of the workpiece 4.

[0038] S3. Start the circulating pump 35, the circulating pump 35 rotates forward, and the circulating pump 35 drives the abrasive block medium of the non-Newtonian fluid in the first abrasive block medium bottle 32 to enter the interior of the workpiece 4 through the first connecting pipe 33, and then flows into the second abrasive block medium bottle 36 through the second connecting pipe 34. After the abrasive block medium in the second connecting pipe 34 flows out evenly, start the excitation motor. Under the inertia of the eccentric block 15, the excitation motor drives the rear vibration body 16 to vibrate. The rear vibration body 16 drives the front vibration body 17 to vibrate through the elastic member 18. The front vibration body 17 drives the tooling fixture 2 and the workpiece 4 to vibrate through the back plate 12 and the support frame 13, and the interior cavity of the workpiece 4 is polished and finished by the abrasive block medium.

[0039] S4. After reaching the set polishing time, the excitation motor stops vibrating. The polishing time is determined according to the properties of the workpiece 4 and the abrasive block medium. The circulating pump 35 rotates in the reverse direction, and the fluid in the second abrasive block medium bottle 36 enters the workpiece 4 through the second connecting pipe 34, and then returns to the first abrasive block medium bottle 32 through the first connecting pipe 33, driving the abrasive block medium to flow reversely inside the workpiece 4; start the excitation motor, the vibration mechanism 1 vibrates the workpiece 4, and the workpiece 4 is polished and finished. After reaching the set polishing time, the excitation motor stops.

[0040] S5. Rotate the back plate 12, and the back plate 12 drives the workpiece 4 to change its posture through the support frame 13, and lock the back plate 12 through the setscrew; repeat S3 - S4.

[0041] S6. Rotate the mounting plate 14, adjust the posture of the workpiece 4 through the mounting plate 14, and lock the mounting plate 14 with a setscrew; repeat S3 - S4.

[0042] S7. Repeat S5 - S6 to complete the polishing and finishing of the workpiece 4, and disconnect the first connecting pipe 33 and the second connecting pipe 34 from the joint of the workpiece 4.

[0043] S8. Perform ultrasonic cleaning on the workpiece 4, and store it after air drying.

[0044] Steps S5, S6 and S7 are selected to be set or not according to the specific situation of the inner cavity of the workpiece 4.

[0045] The excitation frequency of the back plate 12 is 38 Hz - 45 Hz, and the amplitude is 1.5 mm - 3 mm.

[0046] Appropriately increasing the excitation frequency can increase the number of impacts between the abrasive block and the surface of the workpiece 4, accelerate the material removal speed, and improve the polishing efficiency. The frequency affects the movement trajectory of the abrasive block and the stability of the action on the workpiece 4. A stable and appropriate frequency can ensure that the movement trajectory of the abrasive block is regular and improve the processing accuracy. The amplitude affects the stability of the polishing process and the impact force on the workpiece 4. Within the set frequency and amplitude of the present invention, it is beneficial to improve the polishing and finishing effect of the workpiece 4.

[0047] Therefore, by using the tube - type cavity two - way flow composite high - frequency vibration finishing device and processing method of the present invention, the problems of poor inner - cavity polishing quality of existing tube - type cavity parts and easy residue of abrasive blocks in the inner cavity can be solved.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements do not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device, characterized in that: include: A vibration mechanism is used to provide exciting force for finishing processing of the workpiece; A fixture, arranged on the vibration mechanism, for clamping the workpiece; A two-way flow mechanism is arranged on one side of the vibration mechanism and is used for finishing the workpiece; the two-way flow mechanism includes a first abrasive block medium bottle and a second abrasive block medium bottle, the first abrasive block medium bottle and the second abrasive block medium bottle are filled with abrasive block medium, the first abrasive block medium bottle is connected to one end of the internal cavity of the workpiece through a first connecting tube, and the second abrasive block medium bottle is connected to the other end of the internal cavity of the workpiece through a second connecting tube, and a circulating pump is arranged on the first connecting tube or the second connecting tube.

2. According to claim 1, a tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device is characterized in that: The grinding block medium is a non-Newtonian fluid liquid medium; the circulating pump is a peristaltic pump, the circulating pump is arranged on the second connecting pipe, and the peristaltic pump, the first grinding block medium bottle and the second grinding block medium bottle are all arranged on the supporting platform.

3. The tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 1, characterized in that: The vibration mechanism includes a body, a back plate is arranged on one side of the body, the back plate is rotatably connected to the body, a support frame is arranged on the back plate, a tooling fixture is arranged on the support frame, the tooling fixture is rotatably connected to the support frame, and the rotation axis of the support frame is perpendicular to the rotation axis of the back plate.

4. The tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 1, characterized in that: The body comprises a rear vibrating body and a front vibrating body, the front vibrating body and the rear vibrating body are connected via a plurality of elastic members, the back plate is rotatably arranged on the front vibrating body, and the rear vibrating body is provided with an exciting motor for driving the rear vibrating body to vibrate.

5. The tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 4, characterized in that: The two exciting motors are provided with two vibration motors, which are symmetrically arranged on both sides of the rear vibrating body. The two exciting motors rotate in opposite directions to offset the exciting force of the rear vibrating body in the vertical direction.

6. The tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 1, characterized in that: The tooling fixture includes a pad block, which is fixed on a mounting plate, and the mounting plate is rotatably set on a support frame. A groove for placing a workpiece is set at the center of the pad block; a limit block is set on the mounting plate, and the limit block is located on one side of the pad block, and the limit block limits one side of the workpiece; a pressure plate is set above the pad block, and a pressure block for pressing the workpiece is set on the pressure plate, and the pressure plate is fixedly connected to the mounting plate.

7. The tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 6, characterized in that: The groove of the cushion block is provided with a pipe hole for facilitating the installation of the pipeline of the bidirectional flow mechanism, the limit block is provided with a long slot hole, the limit block is fixedly connected to the mounting plate through bolts and the long slot hole, and the end of the limit block close to the workpiece is a limit surface adapted to the shape of the workpiece; The lower surface of the pressure plate is provided with an installation groove, the pressure block is arranged in the installation groove, the pressure block is provided with a first connecting hole, and the pressure plate is provided with a second connecting hole. The first connecting hole and the second connecting hole are reserved holes for facilitating the setting of the pipeline of the two-way flow mechanism; a plurality of fixing holes are provided on the pressure plate, and the pressure plate is fixedly connected to the mounting plate through the fixing holes and bolts.

8. A processing method based on a tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Place the workpiece in the groove of the cushion block, adjust the position of the limit block so that the limit surface contacts the surface of the workpiece, and fix the limit block on the mounting plate by bolts; fix the pressing block on the pressing plate by bolts, place the pressing plate above the workpiece, and press the pressing block tightly on the workpiece; S2, inserting one end of the first connecting tube into the first grinding block medium bottle, connecting the other end of the first connecting tube to the joint at one end of the workpiece, connecting the circulating pump to the second connecting tube, inserting one end of the second connecting tube into the second grinding block medium bottle, and connecting the other end of the second connecting tube to the joint at the other end of the workpiece; S3, start the circulation pump, the circulation pump rotates forward, the circulation pump drives the non-Newtonian fluid in the first abrasive medium bottle into the workpiece through the first connecting pipe, and then flows into the second abrasive medium bottle through the second connecting pipe; after the abrasive medium in the second connecting pipe flows out evenly, start the exciting motor, and drive the rear vibrator to vibrate through the exciting motor under the inertia of the eccentric block, the rear vibrator drives the front vibrator to vibrate through the elastic member, the front vibrator drives the fixture and the workpiece to vibrate through the back plate and the support frame, and the internal cavity of the workpiece is polished and finished by the abrasive medium; S4, after the polishing setting time is reached, the vibration motor stops vibrating; the circulation pump rotates in the reverse direction, the fluid in the second grinding block medium bottle enters the workpiece through the second connecting pipe, and then returns to the first grinding block medium bottle through the first connecting pipe, driving the grinding block medium to flow in the reverse direction inside the workpiece; The vibration motor is started, and the vibration mechanism vibrates the workpiece to perform polishing and finishing on the workpiece. After the polishing setting time is reached, the vibration motor stops.

9. The processing method of a tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 8, characterized in that: The S4 also includes: S5, rotating the back plate, the back plate drives the workpiece to change its posture through the support frame, and repeating S3-S4; S6, rotate the mounting plate, adjust the workpiece posture through the mounting plate, and repeat S3-S4; S7, repeat S5-S6 to complete the polishing and finishing of the workpiece, and disconnect the first connecting pipe, the second connecting pipe and the workpiece joint; S8. Perform ultrasonic cleaning on the workpiece, dry it and store it.

10. The processing method of a tube-type cavity bidirectional flow composite high-frequency vibration finishing processing device according to claim 8, characterized in that: The excitation frequency of the back plate is 38 Hz-45 Hz, and the amplitude is 1.5 mm-3 mm.

Images