Deep hole inner molded surface profiling boring direct-drive intelligent control cutter system

Abstract

The invention belongs to the field of machine manufacturing, and discloses a deep hole inner molded surface profiling boring direct-drive intelligent control cutter system which comprises a cutter assembly, a rotary drive assembly and a sensor assembly. A rotary driving shaft of the rotary driving assembly is connected with an axial gear of the right-angle bevel gear pair, the inner side of a radial gear is connected with a driving nut, and the base plate and the tool apron are connected through a ball screw, so that a blade on the tool apron is driven to achieve radial feeding. The sensor assembly comprises a force sensor, a temperature sensor and a vibration sensor, signals are collected in real time and fed back to the drive control circuit board to control the rotary drive assembly, and therefore the profiling boring precision of blade feeding is improved. Direct driving and intelligent sensing control are combined and embedded in the profiling adjusting type boring cutter, a cutter transmission chain is greatly reduced, the transmission rigidity, the control precision and the response speed are improved, and therefore the performance requirements of a deep hole complex inner profile for high precision, high quality, high efficiency and high cost performance are met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical manufacturing, and particularly relates to a deep hole inner profile copying boring direct drive intelligent control cutter system. BACKGROUND

[0002] In recent years, deep hole parts are increasingly widely used in various manufacturing fields, and the inner profile machining is a key link in the machining process of deep hole parts. The link is difficult, high in technical content and high in processing cost. The deep hole inner profile machining is limited by the structural characteristics of the large length-diameter ratio of the deep hole part. The space inside the workpiece is narrow, and the driving transmission chain is very long along the axial direction, so that the existing machining cutter is poor in strength and rigidity during machining, and it is difficult to discharge chips and cool and lubricate. Therefore, how to improve the stability of deep hole inner profile machining, control precision, inner profile quality and production efficiency is the difficulty and pain point of designing such deep hole inner profile machining cutter.

[0003] The patent for invention with publication number CN114260479A discloses a precision boring cutter for bottle cavity deep hole inner contour machining, which comprises a boring bar, a variable diameter structure and a pull rod. The pull rod penetrates the boring bar and is connected with a transmission positioning block. The transmission positioning block is connected with a servo-controlled screw nut pair transmission system outside, so as to drive the pull rod to perform axial linear extension and contraction. The axial linear extension and contraction of the pull rod is transmitted to the mandrel through a pin, and the mandrel converts the axial linear extension and contraction into the radial linear extension and contraction of the sliding block through a slope, so as to realize the radial extension and contraction of the tool holder and the blade on the sliding block. The extension and contraction control of the blade needs to be transmitted to the blade through the boring bar penetrating the entire deep hole part by the external servo control (motor), the transmission link is long, the overhang is too long, it is difficult to achieve accurate control of the extension and contraction movement of the blade, and the machining quality, precision and efficiency cannot be guaranteed. SUMMARY

[0004] To solve the problems existing in the prior art, the present application provides a deep hole inner profile copying boring direct drive intelligent control cutter system. The electromagnetic direct drive assembly is directly embedded in the cutter, and the corresponding cutter assembly and drive assembly are designed, so that the extension and contraction movement of the blade can be adjusted in a large range, and the accuracy and rigidity of the drive transmission are guaranteed. In addition, the multi-sensor assembly constructed by using intelligent sensing technology can monitor the cutting state signals of the variable diameter copying machining in real time, and the sensor signals can be directly fed back to the drive assembly to dynamically and intelligently control the boring process of the cutter.

[0005] To achieve the above-mentioned purposes, the present application provides the following technical solutions: The deep hole inner profile copying boring direct drive intelligent control cutter system of the present application comprises: The tool assembly comprises a bevel gear pair, a drive nut, a ball screw, a tool holder, a blade and a tool body sleeve; the axial gear of the bevel gear pair is aligned with the central axis of the tool body sleeve, the drive nut is nested into the inner hole of the radial gear of the bevel gear pair, and the ball screw is arranged in the drive nut in a matched mode; the radial outer side of the ball screw is connected with a coupling chassis, the radial outer side of the coupling chassis is provided with a force sensor, the force sensor is connected with the tool holder, and the blade is arranged on the tool holder in a radial mode. The rotary drive assembly comprises a rotary drive shaft arranged in the tool body sleeve and connected with the rear end of the axial gear of the bevel gear pair, and the rotary drive assembly drives the rotary drive shaft to rotate the tool assembly through electromagnetic interaction. The sensor assembly comprises a force sensor, a temperature sensor and a vibration sensor; the force sensor and the temperature sensor are connected with the tool holder; and the vibration sensor is arranged in the tool body sleeve.

[0006] As a further improvement of the present application, the rotary drive shaft is coaxially arranged in the tool body sleeve through two second bearings, and a plurality of rows of guide blocks are uniformly arranged on the outer circle of the tool body sleeve in a circumferential direction.

[0007] As a further improvement of the present application, the radial gear in the bevel gear pair is connected with a feed shaft upper end cover through a first bearing on the axial outer side, the feed shaft upper end cover is nested with a snap spring on the inner side, and a feed shaft lower end cover is arranged on the outer side of the tool holder.

[0008] As a further improvement of the present application, the rotary drive assembly further comprises a rotor core, the rotor core is nested on the outer circle of the rotary drive shaft, U-shaped stator cores and rectangular permanent magnets are arranged on the radial outer circle of the rotor core in a circumferential direction at intervals, and the U-shaped stator cores and the rectangular permanent magnets are nested into the inner circle surface of the stator sleeve on the radial outer side surface. Among the circumferentially adjacent two U-shaped stator cores and the rectangular permanent magnet therebetween, a rectangular winding is arranged around.

[0009] As a further improvement of the present application, the rotary drive assembly comprises a stator sleeve, the inner side of the axial front end of the stator sleeve is connected with the rotary drive shaft through a third bearing; the outer circle of the axial front end of the stator sleeve is nested into the axial rear end of the tool body sleeve; so that the tool assembly and the rotary drive assembly are coaxially arranged.

[0010] As a further improvement of the application, the outer circle of the axial rear end of the rotating drive shaft is sequentially nested with a rotary encoder, a drive control circuit board and a fourth bearing, the axial rear end of the stator sleeve is provided with a stator end cover, the stator end cover is connected with the rotating drive shaft through the fourth bearing, and the rotary encoder and the drive control circuit board are respectively connected and fixed on the inner side circumference of the stator end cover.

[0011] As a further improvement of the application, the stator sleeve is used for fixing the U-shaped stator core, the rectangular ring winding and the rectangular permanent magnet, and when the drive control circuit board passes current to the rectangular ring winding, torque is generated on the rotor core to rotate, thereby driving the rotating drive shaft, the right-angle bevel gear pair and the drive nut to rotate, the rotary motion of the drive nut is converted into the radial linear motion of the ball screw, thereby driving the coupling chassis and the tool holder to make the cutting blade radially feed to realize profile boring.

[0012] As a further improvement of the application, the radial outer side of the force sensor is connected with the tool holder for real-time collection of the cutting force of the cutting blade, the temperature sensor is radially arranged on the tool holder for real-time collection of the temperature change of the cutting blade, and the vibration sensor is arranged in the tool body sleeve and aligned with the central axis of the tool body sleeve for real-time collection of the vibration condition of the tool body sleeve.

[0013] As a further improvement of the application, the sensor assembly further comprises a signal amplifier, the signal amplifier amplifies the collected signals of the force sensor, the temperature sensor and the vibration sensor and transmits them to the drive control circuit board, a closed-loop control system is constructed by the drive control circuit board in combination with the feedback signals of the rotary encoder, the force sensor, the temperature sensor and the vibration sensor, thereby adjusting the current passed to the rectangular ring winding and finally implementing dynamic intelligent control on the profile boring of the cutting blade feed.

[0014] As a further improvement of the application, the axial rear end of the rotating drive assembly is provided with a tool extension rod, the tool extension rod is nested into the stator end cover and connected with the stator sleeve, the outer diameters of the tool body sleeve, the stator sleeve and the tool extension rod are the same and smaller than the deep hole part to be profile bored, the tool extension rod can be circumscribed by the machine tool feeding device, thereby sequentially driving the tool extension rod, the stator sleeve and the tool body sleeve into the deep hole part by the feeding device, so that the cutting blade axially reaches the profile boring area of the deep hole part for machining, and the deep hole part is connected with the machine tool spindle to rotate during profile boring, and the tool body sleeve is supported and guided in the deep hole part by the guide block.

[0015] Compared with the prior art, the application has the following beneficial effects: Through electromagnetic direct drive technology, a compact rotary drive assembly is designed to be embedded in the cutter to directly drive the cutter assembly to control the radial expansion and contraction of the blade, so as to realize the profiling boring of the inner surface of the deep hole. The embedded direct drive rotation makes the overall structure of the cutter compact, and the driving device does not need to be additionally arranged on the machine tool and then transmitted to the cutter blade through a long tool shank, so that the cutter transmission chain is greatly reduced, the overall rigidity of the cutter system and the stability of the cutting force loading can be significantly improved, and the precision and efficiency of the deep hole machining are improved, and the production cost is reduced. On this basis, the intelligent sensing technology is also integrated into the direct drive cutter, a plurality of sensor feedback signals such as force sensors, temperature sensors and vibration sensors are arranged in the cutter working area, and an online intelligent control system for cutter profiling boring is constructed.

[0016] It is particularly pointed out that, unlike some existing intelligent cutters which can only monitor the cutting state of the cutter through sensor signal feedback, the intelligent sensing of the present application directly feeds back the real-time control of the direct drive motor, adjusts the control effect of the driving assembly through real-time state signals, so as to achieve higher-order intelligent control of the direct drive cutter, and realize high-precision, high-quality and high-efficiency profiling machining of the inner surface of the deep hole. Only the direct drive and intelligent sensing can achieve the effect, and there is no any invention scheme related to it at present. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present application in any way. In addition, the shapes and scale sizes of the components in the drawings are only illustrative and are used to help understand the present application, and are not specific limitations on the shapes and scale sizes of the components. In the drawings: Figure 1 It is a schematic diagram of the overall axial cross-sectional structure of a deep hole inner surface profiling boring direct drive intelligent control cutter system; Figure 2 It is a schematic diagram of the variable diameter machining process state of a deep hole inner surface profiling boring direct drive intelligent control cutter system; Figure 3 It is a cross-sectional schematic diagram of a rotary drive assembly of a deep hole inner surface profiling boring direct drive intelligent control cutter system; Figure 4 It is a three-dimensional structure schematic diagram of a rotary drive assembly of a deep hole inner surface profiling boring direct drive intelligent control cutter system; Figure 5 It is a schematic diagram of the overall three-dimensional shape of a deep hole inner surface profiling boring direct drive intelligent control cutter system; Figure 6 It is a schematic diagram of a deep hole inner surface profiling boring direct drive intelligent control cutter system in deep hole part machining; Figure 7A schematic diagram of a control system structure of a deep hole inner profile copying boring direct drive intelligent control tool system; Wherein, 1, tool assembly; 2, rotary drive assembly; 3, sensor assembly; 4, deep hole part; 5, bevel gear pair; 6, drive nut; 7, ball screw; 8, coupling chassis; 9, tool holder; 10, blade; 11, first bearing; 12, circlip; 13, feed shaft upper end cover; 14, tool body sleeve; 15, feed shaft lower end cover; 16, second bearing; 17, rotary drive shaft; 18, guide block; 19, third bearing; 20, stator sleeve; 21, U-shaped stator core; 22, rectangular ring winding; 23, rectangular permanent magnet; 24, rotor core; 25, stator end cover; 26, fourth bearing; 27, rotary encoder; 28, drive control circuit board; 29, tool extension rod; 30, force sensor; 31, temperature sensor; 32, vibration sensor; 33, signal amplifier. DETAILED DESCRIPTION

[0018] In order to make the personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0019] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for purposes of illustration only and are not intended to be limiting.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0021] As Figures 1 to 7 As shown in the figure, the present application provides a deep hole inner profile copying boring direct drive intelligent control tool system; the tool mainly consists of tool assembly 1, rotary drive assembly 2 and sensor assembly 3. The tool assembly 1 and the rotary drive assembly 2 are placed coaxially in sequence, and the sensor assembly 3 is built-in in the tool assembly 1.

[0022] The working principle is that a pair of bevel gears in the tool assembly 1 is engaged at right angles, and the torque generated by the rotary drive assembly 2 is rotated, and the rotary drive is converted into the linear feeding motion of the blade 10 through the screw nut transmission structure. The rotary drive assembly 2 adopts the principle of switched flux permanent magnet motor, and the electromagnetic interaction between the motor stator and rotor drives the rotary drive shaft 17 to rotate. The sensor assembly 3 collects force, temperature and vibration signals, and feeds back to the drive control circuit board 28 of the rotary drive assembly 2 in real time, so as to realize the dynamic accurate adjustment of the feeding motion of the blade 10. The radial feeding of the blade 10 cooperates with the axial feeding of the overall tool, and the rotation of the deep hole part 4, so as to realize the profiling boring of the inner surface of the deep hole part.

[0023] The deep hole inner surface profiling boring direct drive intelligent control tool system combines electromagnetic direct drive, intelligent sensing and intelligent control technology, so that the tool realizes the direct drive intelligent control of the inner surface profiling boring, the transmission is simple, the overall structure is compact, the robustness is strong, and the control precision is high. It is especially suitable for machining of deep hole inner surface.

[0024] Among them, in combination with Figure 1 , Figure 2 and Figure 4 , the tool assembly 1 includes a right-angle bevel gear pair 5, a drive nut 6, a ball screw 7, a tool holder 9, a blade 10 and a tool body sleeve 14; the axial gear of the right-angle bevel gear pair 5 is aligned with the center axis of the tool body sleeve 14, the drive nut 6 is nested into the radial gear inner hole of the right-angle bevel gear pair 5, and the ball screw 7 is arranged in the drive nut 6 in a matched manner; Illustratively, the ball screw 7 is connected with a coupling chassis 8 on the radial outside, the coupling chassis 8 is provided with a force sensor 30 on the radial outside, the force sensor 30 is connected with the tool holder 9, and the blade 10 is arranged on the tool holder 9 in a radial direction; Further, the rotary drive assembly 2 includes a rotary drive shaft 17, the rotary drive shaft 17 is arranged in the tool body sleeve 14 and connected with the rear end of the axial gear of the right-angle bevel gear pair 5, and the rotary drive assembly 2 drives the rotary drive shaft 17 to rotate through electromagnetic interaction, thereby driving the tool assembly 1 to rotate; Further, the sensor assembly 3 includes a force sensor 30, a temperature sensor 31, a vibration sensor 32 and a signal amplifier 33. The radial outside of the force sensor 30 is connected with the tool holder 9 for real-time collection of the cutting force of the blade 10, the temperature sensor 31 is arranged on the tool holder 9 in a radial direction for real-time collection of the temperature change of the blade 10, and the vibration sensor 32 is arranged in the tool body sleeve 14 and aligned with the center axis of the tool body sleeve 14 for real-time collection of the vibration condition of the tool body sleeve 14.

[0025] In combination with the attached Figure 1 ,Figure 5 As shown, the radial gear of the straight bevel gear pair 5 is connected with the upper end cover of the feed shaft 13 through the first bearing 11, the inside of the upper end cover of the feed shaft 13 is nested with the snap spring 12, and the outside of the tool holder 9 is provided with the lower end cover of the feed shaft 15.

[0026] Further, the rotary drive shaft 17 is coaxially arranged in the tool body sleeve 14 through two second bearings 16, and a plurality of rows of guide blocks 18 are uniformly arranged on the outer circle of the tool body sleeve 14.

[0027] Further, the rotary drive assembly 2 comprises a stator sleeve 20, the inside of the axial front end of the stator sleeve 20 is connected with the rotary drive shaft 17 through the third bearing 19; the axial front end of the stator sleeve 20 is nested into the axial rear end of the tool body sleeve 14. Thus, the tool assembly 1 and the rotary drive assembly 2 are coaxially arranged.

[0028] Combined with the accompanying drawings Figure 1 , Figure 3 , Figure 4 As shown, the rotary drive assembly 2 further comprises a rotor core 24, the rotor core 24 is nested on the outer circle of the rotary drive shaft 17, the radial outer circle of the rotor core 24 is spaced apart in the circumferential direction and provided with a U-shaped stator core 21 and a rectangular permanent magnet 23, the radial outer side of the U-shaped stator core 21 and the rectangular permanent magnet 23 is nested into the inner circle of the stator sleeve 20.

[0029] Further, the U-shaped stator core 21 and the rectangular permanent magnet 23 are arranged in the circumferential direction and provided with a rectangular winding set 22, the rectangular winding set 22 is arranged in the circumferential direction.

[0030] Further, the rotary drive shaft 17 is sequentially nested with a rotary encoder 27, a drive control circuit board 28, and a fourth bearing 26 on the outer circle of the axial rear end, the stator sleeve 20 is provided with a stator end cover 25, the stator end cover 25 is connected with the rotary drive shaft 17 through the fourth bearing 26; the rotary encoder 27 and the drive control circuit board 28 are respectively connected and fixed on the inner circle of the stator end cover 25.

[0031] Combined with the accompanying drawings Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the stator sleeve 20 is used to fix the U-shaped stator core 21, the rectangular ring winding 22 and the rectangular permanent magnet 23; wherein, when the driving control circuit board 28 passes current to the rectangular ring winding 22, torque is generated on the rotor core 24 to rotate, thereby driving the rotating drive shaft 17, the bevel gear pair 5, the drive nut 6 to rotate, the rotational movement of the drive nut 6 is converted into the radial linear movement of the ball screw 7, thereby driving the coupling chassis 8 and the tool holder 9 to make the cutter 10 radially feed to realize profile boring.

[0032] The accompanying drawings are referred to in conjunction with the Figure 1 , Figure 2 , Figure 3 As shown, the sensor assembly 3 further comprises a signal amplifier 33, which amplifies the collected signals of the force sensor 30, the temperature sensor 31 and the vibration sensor 32 and transmits them to the driving control circuit board 28, which constructs a closed-loop control system in combination with the feedback signals of the rotary encoder 27, the force sensor 30, the temperature sensor 31 and the vibration sensor 32, so as to adjust the current passing through the rectangular ring winding 22 and finally implement dynamic intelligent control over the profile boring of the cutter 10.

[0033] The accompanying drawings are referred to in conjunction with the Figure 4 , Figure 1 , Figure 2 , Figure 3 Figure 4 Figure 1 Figure 2 Figure 5 Figure 7 As shown, the rotating drive assembly 2 can be provided with a tool extension rod 29 at the axial rear end, which is nested into the stator end cover 25 and connected with the stator sleeve 20; the tool body sleeve 14, the stator sleeve 20 and the tool extension rod 29 have the same outer diameter, which is slightly smaller than the deep hole part 4 to be profile bored. The tool extension rod 29 can be externally connected to the machine tool feeding device, so that the feeding device drives the tool extension rod 29, the stator sleeve 20 and the tool body sleeve 14 into the deep hole part 4 in sequence, so that the cutter 10 axially reaches the profile boring area of the deep hole part 4 for machining. During profile boring, the deep hole part 4 is connected with the machine tool spindle to rotate, and the tool body sleeve 14 is supported and guided in the deep hole part 4 by the guide block 18.

[0034] Therefore, the deep hole variable-diameter boring direct-drive intelligent cutter has the following advantages: 1. High-efficiency and precise direct drive: the rotating drive assembly embedded in the cutter directly drives the cutter blade, which can realize profile boring of the inner surface of a complex deep hole part, the cutter structure is compact, the transmission chain is short, the transmission efficiency is high, and the stability and reliability are strong.

[0035] 2. Intelligent sensing: the force sensor, vibration sensor and temperature sensor built in the cutter and their signal amplification circuit are constructed to monitor the working condition of the profile boring in real time.

[0036] 3. Direct drive intelligent control: the collected force sensor, vibration sensor and temperature sensor signal is fed back to the driving control circuit board of the rotary drive assembly in real time, thereby constructing a closed-loop control of the blade movement, realizing online intelligent regulation and control of profile boring machining.

[0037] Therefore, the deep hole inner profile profile boring direct drive intelligent control tool system realizes the direct drive and dynamic intelligent control of deep hole inner profile machining, greatly reduces the tool transmission chain, improves the stability, reliability and dynamic response performance of the machining system, thereby effectively improves the efficiency, precision and quality of machining, and realizes the machining of various complex deep hole inner profiles with large length-diameter ratio.

[0038] Many embodiments and many applications other than those described herein will be apparent to those skilled in the art from consideration of the specification and practice of the teachings herein. Therefore, the scope of the present teachings should be determined by the broadest interpretation of the preceding claims together with the full range of equivalents to which the claims are entitled. All articles and references, including patent applications and publications, are herein incorporated by reference for all that they contain. The omission of any aspect of the subject matter disclosed herein from any claim does not preclude that aspect from being claimed in another claim, or in a new claim later added.

Claims

1. A direct-drive intelligent control tool system for deep hole internal profile boring, characterized in that, include: The tool assembly (1) includes a right-angle bevel gear pair (5), a drive nut (6), a ball screw (7), a tool holder (9), a cutting blade (10), and a tool sleeve (14). The axial gear of the right-angle bevel gear pair (5) is aligned with the central axis of the tool sleeve (14). The drive nut (6) is nested into the radial gear inner hole of the right-angle bevel gear pair (5). The ball screw (7) is fitted inside the drive nut (6). A connecting base (8) is connected to the radial outer side of the ball screw (7). A force sensor (30) is provided on the radial outer side of the connecting base (8). The force sensor (30) is connected to the tool holder (9). The cutting blade (10) is radially arranged on the tool holder (9). The rotary drive assembly (2) includes a rotary drive shaft (17), which is disposed inside the cutter body sleeve (14) and connected to the rear end of the axial gear of the right angle bevel gear pair (5). The rotary drive assembly (2) drives the rotary drive shaft (17) to rotate the cutter assembly (1) through electromagnetic interaction. The sensor assembly (3) includes a force sensor (30), a temperature sensor (31) and a vibration sensor (32); the force sensor (30) and the temperature sensor (31) are both connected to the tool holder (9); the vibration sensor (32) is disposed inside the tool sleeve (14).

2. The deep hole internal profile boring direct drive intelligent control tool system according to claim 1, characterized in that, The rotary drive shaft (17) is coaxially mounted inside the cutter sleeve (14) via two second bearings (16), and multiple rows of guide blocks (18) are evenly arranged circumferentially on the outer circle of the cutter sleeve (14).

3. The deep hole internal profile boring direct drive intelligent control tool system according to claim 1, characterized in that, The radial gear in the right-angle bevel gear pair (5) is connected to the upper end cover (13) of the feed shaft via the first bearing (11) on the outer side of the radial gear. A snap ring (12) is nested inside the upper end cover (13) of the feed shaft, and a lower end cover (15) of the feed shaft is provided on the outer side of the tool holder (9).

4. The deep hole internal profile boring direct drive intelligent control tool system according to claim 1, characterized in that, The rotary drive assembly (2) also includes a rotor core (24), which is nested on the outer circle of the rotary drive shaft (17). The outer radial circle of the rotor core (24) is provided with U-shaped stator cores (21) and rectangular permanent magnets (23) spaced apart along the circumference. The outer radial surfaces of the U-shaped stator cores (21) and rectangular permanent magnets (23) are nested into the inner circular surface of the stator sleeve (20). Among them, a rectangular ring group (22) is provided around the two adjacent U-shaped stator cores (21) and the rectangular permanent magnet (23) in the middle, and the rectangular ring group (22) is arranged in the circumferential direction.

5. A direct-drive intelligent control tool system for deep hole internal profile boring according to claim 1, characterized in that, The rotary drive assembly (2) includes a stator sleeve (20), the inner side of the axial front end of the stator sleeve (20) is connected to the rotary drive shaft (17) through a third bearing (19); the outer circle of the axial front end of the stator sleeve (20) is nested into the axial rear end of the tool sleeve (14); thereby making the tool assembly (1) and the rotary drive assembly (2) coaxially arranged.

6. The deep hole internal profile boring direct drive intelligent control tool system according to claim 5, characterized in that, The rotary drive shaft (17) has a rotary encoder (27), a drive control circuit board (28), and a fourth bearing (26) nested in sequence on the outer circle of its axial rear end. The stator sleeve (20) has a stator end cover (25) at its axial rear end. The stator end cover (25) is connected to the rotary drive shaft (17) through the fourth bearing (26). The rotary encoder (27) and the drive control circuit board (28) are respectively connected and fixed on the inner circumference of the stator end cover (25).

7. The deep hole internal profile boring direct drive intelligent control tool system according to claim 5, characterized in that, The stator sleeve (20) is used to fix the U-shaped stator core (21), the rectangular winding assembly (22) and the rectangular permanent magnet (23); when the drive control circuit board (28) applies current to the rectangular winding assembly (22), a torque is generated on the rotor core (24) to rotate, thereby driving the rotary drive shaft (17), the right angle bevel gear pair (5) and the drive nut (6) to rotate. The rotational motion of the drive nut (6) is converted into the radial linear motion of the ball screw (7), thereby driving the connecting chassis (8) and the tool holder (9) to make the cutting tool (10) radially feed to achieve profile boring.

8. The deep hole internal profile boring direct drive intelligent control tool system according to claim 1, characterized in that, The force sensor (30) is connected to the tool holder (9) on its radial outer side to collect the cutting force of the blade (10) in real time. The temperature sensor (31) is radially arranged on the tool holder (9) to collect the temperature change of the blade (10) in real time. The vibration sensor (32) is arranged inside the tool sleeve (14) and aligned with the central axis of the tool sleeve (14) to collect the vibration of the tool sleeve (14) in real time.

9. The deep hole internal profile boring direct drive intelligent control tool system according to claim 8, characterized in that, The sensor assembly (3) also includes a signal amplifier (33), which amplifies the signals collected by the force sensor (30), temperature sensor (31) and vibration sensor (32) and transmits them to the drive control circuit board (28). The drive control circuit board (28) combines the feedback signals of the rotary encoder (27), force sensor (30), temperature sensor (31) and vibration sensor (32) to construct a closed-loop control system, thereby adjusting the current supplied to the rectangular surround group (22) and finally implementing dynamic intelligent control of the profile boring of the cutting tool (10).

10. The deep hole internal profile boring direct drive intelligent control tool system according to claim 1, characterized in that, The rotary drive assembly (2) has a tool extension rod (29) at its axial rear end. The tool extension rod (29) is nested into the stator end cover (25) and connected to the stator sleeve (20). The tool body sleeve (14), stator sleeve (20), and tool extension rod (29) have the same outer diameter, which is smaller than the deep hole part (4) to be profiled and bored. The tool extension rod (29) can be connected to the machine tool feed device, so that the feed device sequentially drives the tool extension rod (29), stator sleeve (20), and tool body sleeve (14) into the deep hole part (4), so that the cutting tool (10) reaches the profiled boring area of ​​the deep hole part (4) for machining. During profiled boring, the deep hole part (4) is connected to the machine tool spindle to achieve rotation. The tool body sleeve (14) is supported and guided in the deep hole part (4) by the guide block (18).

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