An ultrasonic cutting tool system for machining stepped internal holes

Abstract

This invention relates to the field of stepped internal hole machining technology, specifically an ultrasonic cutting tool system for stepped internal hole machining. The system includes a mounting plate with a radially arranged mounting groove on its front end face. A hydraulic telescopic rod A is mounted within the mounting groove. A connecting plate, a pressure sensor, and another hydraulic telescopic rod B are sequentially stacked at the telescopic end of hydraulic telescopic rod A. A connecting block is connected to the telescopic end of hydraulic telescopic rod B. An end cap is connected to the front end of the connecting block. Several piezoelectric ceramic plates are stacked on the front end face of the end cap. An amplitude transformer is connected to the front end face of the foremost piezoelectric ceramic plate. A tool holder is connected to the front end of the amplitude transformer. A strain sensor is mounted on the side of the tool holder. A connecting seat is connected to the front end of the tool holder, and a pneumatic telescopic rod is connected to the connecting seat. This invention solves the problems of poor machining accuracy, poor surface quality, and high machining cost in existing stepped internal hole machining technologies, and is applicable to fields such as automotive manufacturing, electronic equipment, and medical devices.

Description

Technical Field

[0001] This invention relates to the field of stepped internal hole machining technology, specifically an ultrasonic cutting tool system for stepped internal hole machining. Background Technology

[0002] Stepped internal hole machining technology refers to the technique of machining the inner surface of pipe fittings into a stepped surface using cutting tools. It is widely used in automotive manufacturing, electronic equipment, and medical devices. However, in practical applications, existing stepped internal hole machining technologies suffer from the following problems due to the limitations of the cutting tool structure: First, during machining, when the tool shank flexes due to its long overhang, the cutting tool insert deviates from its correct position, leading to machining deviations and consequently poor machining accuracy. Second, during machining, the chips generated during cutting become entangled on the cutting tool insert, causing damage to the machined surface and accelerating tool wear. This results in both poor surface quality and high machining costs. Therefore, it is necessary to invent an ultrasonic cutting tool system for stepped internal hole machining to solve the problems of poor machining accuracy, poor surface quality, and high machining costs associated with existing stepped internal hole machining technologies. Summary of the Invention

[0003] To address the problems of poor machining accuracy, poor surface quality, and high machining cost in existing stepped internal hole machining technologies, this invention provides an ultrasonic cutting tool system for stepped internal hole machining.

[0004] This invention is achieved using the following technical solution:

[0005] An ultrasonic cutting tool system for machining stepped internal holes includes a mounting plate; a radially arranged mounting groove is formed on the front end face of the mounting plate; the first end of the mounting groove is closed, and the last end extends through the side of the mounting plate; a radially arranged hydraulic telescopic rod A is installed in the mounting groove, with the telescopic end of the hydraulic telescopic rod A facing the last end of the mounting groove; a connecting plate, a pressure sensor, and an axially arranged hydraulic telescopic rod B are sequentially stacked on the telescopic end of the hydraulic telescopic rod A, with the telescopic end of the hydraulic telescopic rod B facing forward; a connecting block is connected to the telescopic end of the hydraulic telescopic rod B.

[0006] The front end of the connecting block is connected to an end cap; several piezoelectric ceramic plates are stacked on the front surface of the end cap; an amplitude transformer is connected to the front surface of the foremost piezoelectric ceramic plate; a tool holder is connected to the front end of the amplitude transformer; a strain sensor is installed on the side of the tool holder; a connecting seat is connected to the front end of the tool holder; a radially arranged pneumatic telescopic rod is connected to the connecting seat, and the telescopic end of the pneumatic telescopic rod faces the same direction as the telescopic end of the hydraulic telescopic rod A; a vibration sensor is installed on the side of the pneumatic telescopic rod; connecting plate A, connecting plate B, and tool holder are stacked sequentially on the telescopic end of the pneumatic telescopic rod; a triaxial force sensor is installed between connecting plate A and connecting plate B; and a cutting blade is installed on the tool holder.

[0007] Furthermore, the rear end face of the mounting plate is provided with mounting posts.

[0008] Furthermore, a through screw hole is provided on the connecting plate; a fastening hole A is provided on the pressure sensor; a fastening hole B is provided at the fixed end of the hydraulic telescopic rod B, and the fastening hole B is a stepped hole; a fastening bolt A is inserted through the fastening hole B, the fastening hole A, and the through screw hole, and the head of the fastening bolt A presses tightly against the stepped transition surface of the fastening hole B.

[0009] Furthermore, a connecting cavity is provided on the front end face of the connecting block; a fastening hole C is provided on the cavity wall of the connecting cavity; an end cap is embedded in the connecting cavity; a blind screw hole A is provided on the side of the end cap; a fastening bolt B is inserted through both the fastening hole C and the blind screw hole A, and the head of the fastening bolt B presses tightly against the connecting block.

[0010] Furthermore, a fastening hole D is provided in the center of the end cap; a fastening hole E is provided in the center of each piezoelectric ceramic sheet; a blind screw hole B is provided in the center of the rear end face of the amplitude rod; a fastening bolt C is provided in the fastening hole D, each fastening hole E, and the blind screw hole B, and the head of the fastening bolt C presses tightly against the end cap.

[0011] Furthermore, a blind screw hole C is provided in the center of the front end face of the amplitude rod; the rear end side of the tool bar is provided with an external thread, and the rear end of the tool bar is screwed into the blind screw hole C through the external thread.

[0012] Furthermore, a positioning groove is provided on the side of the tool holder; a blind screw hole D is provided at the bottom of the positioning groove; a strain sensor is embedded in the positioning groove; a fastening hole F is provided on the strain sensor; a fastening bolt D is inserted through both the fastening hole F and the blind screw hole D, and the head of the fastening bolt D presses tightly against the strain sensor.

[0013] Furthermore, a connecting groove is provided on the front end face of the tool holder; the first end of the connecting groove is closed and the last end passes through the side of the tool holder; a fastening hole G is provided on the groove wall of the connecting groove; a connecting seat is embedded in the connecting groove; a blind screw hole E is provided on the connecting seat; a fastening bolt E is inserted through both the fastening hole G and the blind screw hole E, and the head of the fastening bolt E presses tightly against the tool holder.

[0014] Furthermore, the fixed end of the pneumatic telescopic rod has a stepped surface, and the thin section of the stepped surface has external threads; the vibration sensor has a ring structure, and the vibration sensor is sleeved on the thin section of the stepped surface; the thin section of the stepped surface is screwed with a locking nut, and the locking nut presses tightly against the vibration sensor.

[0015] Furthermore, a blind screw hole F is provided on the connecting plate A; a fastening hole H is provided on the connecting plate B, and the fastening hole H is a stepped hole; a fastening bolt F is inserted into both the fastening hole H and the blind screw hole F, and the head of the fastening bolt F is pressed tightly against the stepped transition surface of the fastening hole H; a clamping groove A is provided on the connecting plate A; a clamping groove B is provided on the connecting plate B; a triaxial force sensor is simultaneously embedded in both the clamping groove A and the clamping groove B.

[0016] Compared with existing stepped internal hole machining technologies, the ultrasonic cutting tool system for stepped internal hole machining described in this invention, through its novel structure, possesses the following advantages: First, this invention can correct the position of the cutting insert in real time when the tool holder undergoes deflection due to its long overhang, thereby effectively avoiding machining deviations and thus significantly improving machining accuracy. Second, this invention utilizes axial ultrasonic vibration to break up the chips generated during cutting, thereby effectively preventing chips from entangled on the cutting insert, effectively avoiding damage to the machined surface and accelerated wear of the cutting tool, thus effectively improving the surface quality of the machined surface and significantly reducing machining costs.

[0017] This invention effectively solves the problems of poor machining accuracy, poor surface quality, and high machining cost of existing stepped internal hole machining technology, and is applicable to fields such as automobile manufacturing, electronic equipment, and medical devices. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 yes Figure 1 Partial structural diagram Figure 1 .

[0020] Figure 3 yes Figure 2 Partial structural diagram Figure 1 .

[0021] Figure 4 yes Figure 3 Another structural diagram from another angle.

[0022] Figure 5 yes Figure 2 Partial structural diagram Figure 2 .

[0023] Figure 6 yes Figure 5 Another structural diagram from another angle.

[0024] Figure 7 yes Figure 6 A partial structural diagram.

[0025] Figure 8 yes Figure 1 Partial structural diagram Figure 2 .

[0026] Figure 9 yes Figure 8 Partial structural diagram Figure 1 .

[0027] Figure 10 yes Figure 9 A sectional view.

[0028] Figure 11 yes Figure 10 Partial structural diagram Figure 1 .

[0029] Figure 12 yes Figure 10 Partial structural diagram Figure 2 .

[0030] Figure 13 yes Figure 10 Partial structural diagram Figure 3 .

[0031] Figure 14 yes Figure 8 Partial structural diagram Figure 2 .

[0032] Figure 15 yes Figure 14 A sectional view.

[0033] Figure 16 yes Figure 15 A partial structural diagram.

[0034] Figure 17 yes Figure 14 A partial structural diagram.

[0035] Figure 18 yes Figure 1 Partial structural diagram Figure 3 .

[0036] Figure 19 yes Figure 18 Partial structural diagram Figure 1 .

[0037] Figure 20 yes Figure 19 Another structural diagram from another angle.

[0038] Figure 21 yes Figure 18Partial structural diagram Figure 2 .

[0039] Figure 22 yes Figure 21 Another structural diagram from another angle.

[0040] In the diagram: 1-Mounting plate, 1.1-Mounting groove, 1.2-Mounting column, 2-Hydraulic telescopic rod A, 3-Connecting plate, 3.1-Through screw hole, 4-Pressure sensor, 4.1-Fasting hole A, 5-Hydraulic telescopic rod B, 5.1-Fasting hole B, 6-Connecting block, 6.1-Connecting cavity, 6.2-Fasting hole C, 7-End cap, 7.1-Blind screw hole A, 7.2-Fasting hole D, 8-Piezoelectric ceramic plate, 8.1-Fasting hole E, 9-Amplitude rod, 9.1-Blind screw hole B, 9.2-Blind screw hole C, 10-Tool bar, 10.1-Positioning groove, 10.2-Blind screw hole D, 10.3-Connecting groove, 10.4-Fasting hole G, 11-Strain sensor, 11.1-Fasting hole F, 12-Connecting seat, 12.1-Blind screw hole E, 13-Pneumatic telescopic rod, 14-Vibration sensor, 15-Connecting plate A, 15.1-Blind screw hole F, 15.2-Clamping groove A, 16-Connecting plate B, 16.1-Fasting hole H, 16.2-Clamping groove B, 17-Tool holder, 18-Triaxial force sensor, 19-Blade, 20-Fasting bolt A, 21-Fasting bolt B, 22-Fasting bolt C, 23-Fasting bolt D, 24-Fasting bolt E, 25-Locking nut, 26-Fasting bolt F. Detailed Implementation

[0041] An ultrasonic cutting tool system for machining stepped internal holes includes a mounting plate 1; a radially arranged mounting groove 1.1 is formed on the front end face of the mounting plate 1; the first end of the mounting groove 1.1 is closed, and the last end extends through the side of the mounting plate 1; a radially arranged hydraulic telescopic rod A2 is installed in the mounting groove 1.1, and the telescopic end of the hydraulic telescopic rod A2 faces the last end of the mounting groove 1.1; a connecting plate 3, a pressure sensor 4, and an axially arranged hydraulic telescopic rod B5 are sequentially stacked on the telescopic end of the hydraulic telescopic rod A2, and the telescopic end of the hydraulic telescopic rod B5 faces forward; a connecting block 6 is connected to the telescopic end of the hydraulic telescopic rod B5.

[0042] The front end of the connecting block 6 is connected to an end cap 7; several piezoelectric ceramic plates 8 are stacked on the front surface of the end cap 7; an amplitude transformer 9 is connected to the front surface of the foremost piezoelectric ceramic plate 8; a tool holder 10 is connected to the front end of the amplitude transformer 9; a strain sensor 11 is installed on the side of the tool holder 10; a connecting seat 12 is connected to the front end of the tool holder 10; a radially arranged pneumatic telescopic rod 13 is connected to the connecting seat 12, and the telescopic end of the pneumatic telescopic rod 13 faces the same direction as the telescopic end of the hydraulic telescopic rod A2; a vibration sensor 14 is installed on the side of the pneumatic telescopic rod 13; a connecting plate A15, a connecting plate B16, and a tool holder 17 are stacked sequentially on the telescopic end of the pneumatic telescopic rod 13; a triaxial force sensor 18 is installed between the connecting plate A15 and the connecting plate B16; and a blade 19 is installed on the tool holder 17.

[0043] During operation, the pipe fitting is mounted on the spindle of the machine tool, the mounting plate 1 is mounted on the tool post of the machine tool, the cutting tool 19 is in contact with the inner surface of the pipe fitting, the hydraulic telescopic rod A2 and the hydraulic telescopic rod B5 are respectively connected to two hydraulic pumps, the pneumatic telescopic rod 13 is connected to an air pump, the two hydraulic pumps, the air pump, the pressure sensor 4, the strain sensor 11, the vibration sensor 14, and the triaxial force sensor 18 are all connected to the host computer of the machine tool, and each piezoelectric ceramic plate 8 is connected to an ultrasonic generator.

[0044] The specific working process is as follows: The machine tool is started, and the machine spindle rotates, thereby driving the pipe fitting to rotate. Then, the host computer of the machine tool controls the hydraulic telescopic rods A2 and B5 respectively through two hydraulic pumps. This causes the cutting tool 19 to perform radial feed under the extension and retraction of hydraulic telescopic rod A2, and axial feed under the extension and retraction of hydraulic telescopic rod B5. Based on the radial and axial feeds, the cutting tool 19 cuts the inner surface of the pipe fitting, thereby machining the inner surface of the pipe fitting into a stepped surface.

[0045] During this process, the ultrasonic generator is activated, converting mains power into an ultrasonic alternating current signal. This signal is then transmitted to each piezoelectric ceramic element 8, which converts the alternating current signal into axial ultrasonic vibration. This axial ultrasonic vibration is sequentially transmitted through the amplitude transformer 9, tool holder 10, connecting seat 12, pneumatic telescopic rod 13, connecting plate A15, connecting plate B16, and tool holder 17 to the cutting tool 19, thus causing the cutting tool 19 to undergo axial ultrasonic vibration. Under the action of this axial ultrasonic vibration, the chips generated during cutting break, thereby preventing chips from entangled on the cutting tool 19.

[0046] The strain sensor 11 monitors in real time whether the tool holder 10 is flexed due to its long overhang and sends the monitoring results to the machine tool's host computer. When the tool holder 10 flexes due to its long overhang, the cutting tool 19 will deviate from its correct position. At this time, the machine tool's host computer controls the pneumatic telescopic rod 13 in real time through the air pump, so that the cutting tool 19 returns to its correct position under the action of the telescopic end of the pneumatic telescopic rod 13, thereby correcting the position of the cutting tool in real time.

[0047] Pressure sensor 4 monitors the pressure between connecting plate 3 and hydraulic telescopic rod B5 in real time and sends the monitoring results to the machine tool's host computer. The host computer adjusts hydraulic telescopic rod A2 in real time based on the monitoring results, thereby stabilizing the pressure between connecting plate 3 and hydraulic telescopic rod B5, and thus stabilizing the contact force between blade 19 and pipe fitting.

[0048] Vibration sensor 14 monitors the vibration state of pneumatic telescopic rod 13 in real time and sends the monitoring results to the host computer of the machine tool in real time. The host computer of the machine tool determines whether the blade 19 is chattering based on the monitoring results. If chattering occurs, the host computer of the machine tool adjusts the hydraulic telescopic rod A2 in real time through one of the hydraulic pumps or adjusts the pneumatic telescopic rod 13 in real time through the air pump, thereby causing the blade 19 to detach from the inner hole surface of the pipe under the action of the extension end of the hydraulic telescopic rod A2 or the pneumatic telescopic rod 13.

[0049] The triaxial force sensor 18 monitors the triaxial cutting force in real time and sends the monitoring results to the machine tool's host computer. The host computer then adjusts the cutting parameters in real time based on the monitoring results.

[0050] The rear end face of the mounting plate 1 is provided with a mounting post 1.2. During operation, the mounting post 1.2 ensures that the mounting plate 1 is securely mounted on the tool post of the machine tool.

[0051] The connecting plate 3 has a through screw hole 3.1; the pressure sensor 4 has a fastening hole A4.1; the fixed end of the hydraulic telescopic rod B5 has a fastening hole B5.1, which is a stepped hole; a fastening bolt A20 is inserted into the fastening hole B5.1, the fastening hole A4.1, and the through screw hole 3.1, and the head of the fastening bolt A20 is pressed tightly against the stepped transition surface of the fastening hole B5.1. During operation, the fastening bolt A20 ensures a secure connection between the connecting plate 3, the pressure sensor 4, and the hydraulic telescopic rod B5.

[0052] The front end face of the connecting block 6 has a connecting cavity 6.1; the cavity wall of the connecting cavity 6.1 has a fastening hole C6.2; the end cap 7 is embedded in the connecting cavity 6.1; the side of the end cap 7 has a blind screw hole A7.1; a fastening bolt B21 passes through both the fastening hole C6.2 and the blind screw hole A7.1, and the head of the fastening bolt B21 presses tightly against the connecting block 6. During operation, the fastening bolt B21 ensures a reliable connection between the connecting block 6 and the end cap 7.

[0053] A fastening hole D7.2 is provided in the center of the end cap 7; a fastening hole E8.1 is provided in the center of each piezoelectric ceramic plate 8; a blind screw hole B9.1 is provided in the center of the rear end face of the amplitude rod 9; a fastening bolt C22 is inserted into the fastening hole D7.2, each fastening hole E8.1, and the blind screw hole B9.1, and the head of the fastening bolt C22 is pressed tightly against the end cap 7. During operation, the fastening bolt C22 can ensure a reliable connection between the end cap 7, each piezoelectric ceramic plate 8, and the amplitude rod 9.

[0054] A blind screw hole C9.2 is provided in the center of the front end face of the amplitude rod 9; the rear end side of the tool holder 10 is provided with an external thread, and the rear end of the tool holder 10 is screwed into the blind screw hole C9.2 through the external thread. During operation, this design can ensure a reliable connection between the amplitude rod 9 and the tool holder 10.

[0055] A positioning groove 10.1 is provided on the side of the tool holder 10; a blind screw hole D10.2 is provided at the bottom of the positioning groove 10.1; a strain sensor 11 is embedded in the positioning groove 10.1; a fastening hole F11.1 is provided on the strain sensor 11; a fastening bolt D23 is inserted into both the fastening hole F11.1 and the blind screw hole D10.2, and the head of the fastening bolt D23 presses tightly against the strain sensor 11. During operation, the fastening bolt D23 ensures that the strain sensor 11 is securely installed on the tool holder 10.

[0056] The front end face of the tool holder 10 has a connecting groove 10.3; the first end of the connecting groove 10.3 is closed, and the last end extends through the side of the tool holder 10; the groove wall of the connecting groove 10.3 has a fastening hole G10.4; the connecting seat 12 is embedded in the connecting groove 10.3; the connecting seat 12 has a blind screw hole E12.1; a fastening bolt E24 is inserted into both the fastening hole G10.4 and the blind screw hole E12.1, and the head of the fastening bolt E24 presses tightly against the tool holder 10. During operation, the fastening bolt E24 ensures a reliable connection between the tool holder 10 and the connecting seat 12.

[0057] The fixed end of the pneumatic telescopic rod 13 has a stepped surface, and the thin section of the stepped surface has external threads. The vibration sensor 14 has a ring structure and is fitted onto the thin section of the stepped surface. A locking nut 25 is screwed onto the thin section of the stepped surface, and the locking nut 25 presses tightly against the vibration sensor 14. During operation, the locking nut 25 ensures that the vibration sensor 14 is securely mounted on the pneumatic telescopic rod 13.

[0058] A blind screw hole F15.1 is provided on connecting plate A15; a fastening hole H16.1 is provided on connecting plate B16, and fastening hole H16.1 is a stepped hole; a fastening bolt F26 is inserted into both fastening hole H16.1 and blind screw hole F15.1, and the head of fastening bolt F26 is pressed tightly against the stepped transition surface of fastening hole H16.1; a clamping groove A15.2 is provided on connecting plate A15; a clamping groove B16.2 is provided on connecting plate B16; a triaxial force sensor 18 is simultaneously embedded in clamping grooves A15.2 and B16. During operation, fastening bolt F26 ensures a secure connection between connecting plate A15 and connecting plate B16.

[0059] In specific implementation, the number of through screw holes 3.1, fastening holes A4.1, fastening holes B5.1, and fastening bolts A20 are all four. The number of fastening holes C6.2, blind screw holes A7.1, and fastening bolts B21 are all four. The number of positioning grooves 10.1, blind screw holes D10.2, strain sensors 11, fastening holes F11.1, and fastening bolts D23 are all four. The number of blind screw holes F15.1, fastening holes H16.1, and fastening bolts F26 are all four. The cross-section of the connecting groove 10.3 and the cross-section of the connecting seat 12 are both inverted T-shaped.

[0060] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An ultrasonic cutting tool system for machining stepped internal holes, characterized in that: Includes a mounting plate (1); the front end of the mounting plate (1) is provided with a radially arranged mounting groove (1.1); the first end of the mounting groove (1.1) is closed and the last end passes through the side of the mounting plate (1); a radially arranged hydraulic telescopic rod A (2) is installed in the mounting groove (1.1), and the telescopic end of the hydraulic telescopic rod A (2) faces the last end of the mounting groove (1.1); the telescopic end of the hydraulic telescopic rod A (2) is sequentially connected with a connecting plate (3), a pressure sensor (4), and an axially arranged hydraulic telescopic rod B (5), and the telescopic end of the hydraulic telescopic rod B (5) faces forward; the telescopic end of the hydraulic telescopic rod B (5) is connected with a connecting block (6); The front end of the connecting block (6) is connected to an end cap (7); several piezoelectric ceramic plates (8) are stacked on the front end face of the end cap (7); the front end face of the piezoelectric ceramic plate (8) is connected to an amplitude rod (9); the front end of the amplitude rod (9) is connected to a tool bar (10); a strain sensor (11) is installed on the side of the tool bar (10); a connecting seat (12) is connected to the front end of the tool bar (10); a pneumatic telescopic rod (13) is connected to the connecting seat (12) in a radial arrangement, and the telescopic end of the pneumatic telescopic rod (13) faces the same direction as the telescopic end of the hydraulic telescopic rod A (2); a vibration sensor (14) is installed on the side of the pneumatic telescopic rod (13); the telescopic ends of the pneumatic telescopic rod (13) are connected in sequence to a connecting plate A (15), a connecting plate B (16), and a tool holder (17); a triaxial force sensor (18) is installed between the connecting plate A (15) and the connecting plate B (16); a blade (19) is installed on the tool holder (17). During operation, the pipe fitting is installed on the spindle of the machine tool, the mounting plate (1) is installed on the tool post of the machine tool, the blade (19) is in contact with the inner surface of the pipe fitting, the hydraulic telescopic rod A (2) and the hydraulic telescopic rod B (5) are respectively connected to the two hydraulic pumps, the pneumatic telescopic rod (13) is connected to the air pump, the two hydraulic pumps, the air pump, the pressure sensor (4), the strain sensor (11), the vibration sensor (14), and the triaxial force sensor (18) are all connected to the host computer of the machine tool, and each piezoelectric ceramic sheet (8) is connected to the ultrasonic generator; The specific working process is as follows: Start the machine tool, the spindle of the machine tool rotates, thereby driving the pipe to rotate; then, the host computer of the machine tool controls the hydraulic telescopic rod A (2) and the hydraulic telescopic rod B (5) respectively through two hydraulic pumps, thereby making the blade (19) radially feed under the drive of the telescopic end of the hydraulic telescopic rod A (2), and on the other hand, making the blade (19) axially feed under the drive of the telescopic end of the hydraulic telescopic rod B (5); based on the radial feed and axial feed, the blade (19) cuts the inner hole surface of the pipe, thereby processing the inner hole surface of the pipe into a stepped surface; During this process, the ultrasonic generator is activated, converting the mains power into an ultrasonic frequency alternating current signal and transmitting the ultrasonic frequency alternating current signal to each piezoelectric ceramic sheet (8). Each piezoelectric ceramic sheet (8) converts the ultrasonic frequency alternating current signal into axial ultrasonic vibration. The axial ultrasonic vibration is transmitted sequentially through the amplitude transformer (9), the tool holder (10), the connecting seat (12), the pneumatic telescopic rod (13), the connecting plate A (15), the connecting plate B (16), and the tool holder (17) to the blade (19), thereby causing the blade (19) to undergo axial ultrasonic vibration. Under the action of axial ultrasonic vibration, the chips generated during cutting will break, thereby preventing the chips from wrapping around the blade (19). The strain sensor (11) monitors in real time whether the tool bar (10) is flexed due to its long overhang and sends the monitoring results to the host computer of the machine tool in real time. When the tool bar (10) is flexed due to its long overhang, the blade (19) will deviate from the correct position. At this time, the host computer of the machine tool controls the pneumatic telescopic rod (13) in real time through the air pump, so that the blade (19) returns to the correct position under the drive of the telescopic end of the pneumatic telescopic rod (13), thereby correcting the position of the blade in real time. The pressure sensor (4) monitors the pressure between the connecting plate (3) and the hydraulic telescopic rod B (5) in real time and sends the monitoring results to the host computer of the machine tool in real time. The host computer of the machine tool adjusts the hydraulic telescopic rod A (2) in real time according to the monitoring results, thereby keeping the pressure between the connecting plate (3) and the hydraulic telescopic rod B (5) stable, thereby keeping the contact force between the blade (19) and the pipe stable. The vibration sensor (14) monitors the vibration state of the pneumatic telescopic rod (13) in real time and sends the monitoring results to the host computer of the machine tool in real time. The host computer of the machine tool judges whether the blade (19) is chattering based on the monitoring results. If chattering occurs, the host computer of the machine tool adjusts the hydraulic telescopic rod A (2) in real time through one of the hydraulic pumps or adjusts the pneumatic telescopic rod (13) in real time through the air pump. This causes the blade (19) to detach from the inner hole surface of the pipe under the extension and retraction of the hydraulic telescopic rod A (2) or the pneumatic telescopic rod (13). The triaxial force sensor (18) monitors the triaxial cutting force in real time and sends the monitoring results to the host computer of the machine tool in real time; the host computer of the machine tool adjusts the cutting parameters in real time according to the monitoring results.

2. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The rear end face of the mounting plate (1) is provided with mounting posts (1.2).

3. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The connecting plate (3) has a through screw hole (3.1); the pressure sensor (4) has a fastening hole A (4.1); the fixed end of the hydraulic telescopic rod B (5) has a fastening hole B (5.1), and the fastening hole B (5.1) is a stepped hole; the fastening hole B (5.1), the fastening hole A (4.1) and the through screw hole (3.1) are all fitted with a fastening bolt A (20), and the head of the fastening bolt A (20) presses tightly against the stepped transition surface of the fastening hole B (5.1).

4. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The front end face of the connecting block (6) is provided with a connecting cavity (6.1); the cavity wall of the connecting cavity (6.1) is provided with a fastening hole C (6.2); the end cap (7) is embedded in the connecting cavity (6.1); the side of the end cap (7) is provided with a blind screw hole A (7.1); a fastening bolt B (21) is inserted in both the fastening hole C (6.2) and the blind screw hole A (7.1), and the head of the fastening bolt B (21) presses against the connecting block (6).

5. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The end cap (7) has a fastening hole D (7.2) in the center; each piezoelectric ceramic sheet (8) has a fastening hole E (8.1) in the center; the rear end face of the amplitude rod (9) has a blind screw hole B (9.1); fastening bolts C (22) are inserted in the fastening holes D (7.2), each fastening hole E (8.1), and the blind screw hole B (9.1), and the head of the fastening bolts C (22) presses against the end cap (7).

6. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: A blind screw hole C (9.2) is provided in the center of the front end face of the amplitude rod (9); the rear end side of the tool bar (10) is provided with an external thread, and the rear end of the tool bar (10) is screwed into the blind screw hole C (9.2) through the external thread.

7. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: A positioning groove (10.1) is provided on the side of the tool holder (10); a blind screw hole D (10.2) is provided at the bottom of the positioning groove (10.1); a strain sensor (11) is embedded in the positioning groove (10.1); a fastening hole F (11.1) is provided on the strain sensor (11); a fastening bolt D (23) is provided in both the fastening hole F (11.1) and the blind screw hole D (10.2), and the head of the fastening bolt D (23) presses against the strain sensor (11).

8. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The front end face of the tool holder (10) is provided with a connecting groove (10.3); the first end of the connecting groove (10.3) is closed and the last end passes through the side of the tool holder (10); the groove wall of the connecting groove (10.3) is provided with a fastening hole G (10.4); the connecting seat (12) is embedded in the connecting groove (10.3); the connecting seat (12) is provided with a blind screw hole E (12.1); the fastening hole G (10.4) and the blind screw hole E (12.1) are both provided with a fastening bolt E (24), and the head of the fastening bolt E (24) presses against the tool holder (10).

9. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: The fixed end of the pneumatic telescopic rod (13) is a stepped surface, and the thin section of the stepped surface is provided with external threads; the vibration sensor (14) is a ring structure, and the vibration sensor (14) is sleeved on the thin section of the stepped surface; the thin section of the stepped surface is screwed with a locking nut (25), and the locking nut (25) presses the vibration sensor (14) tightly.

10. The ultrasonic cutting tool system for machining stepped internal holes according to claim 1, characterized in that: A blind screw hole F (15.1) is provided on the connecting plate A (15); a fastening hole H (16.1) is provided on the connecting plate B (16), and the fastening hole H (16.1) is a stepped hole; a fastening bolt F (26) is provided in both the fastening hole H (16.1) and the blind screw hole F (15.1), and the head of the fastening bolt F (26) is pressed against the stepped transition surface of the fastening hole H (16.1); a clamping groove A (15.2) is provided on the connecting plate A (15); a clamping groove B (16.2) is provided on the connecting plate B (16); a triaxial force sensor (18) is embedded in both the clamping groove A (15.2) and the clamping groove B (16.2).

Images