Inner hole automatic hammering strengthening device and using method

Abstract

The invention provides an inner hole automatic hammering and strengthening device and a using method, the inner hole automatic hammering and strengthening device comprises a hammering device mounted on a machine tool tailstock, a plurality of hammering heads capable of reciprocating in the radial direction are arranged on the peripheral side of the end of the hammering device, the hammering heads are arranged in a workpiece mounted on a machine tool chuck and used for hammering and strengthening the inner wall of the workpiece, and a sliding supporting seat is arranged on a machine tool sliding rail. The sliding supporting seat is used for supporting the hammering device; a sliding hammer core shaft is arranged in the hammering sleeve, the bottom of the hammering head is clamped on the hammer core shaft to slide, a pneumatic linear vibrator is arranged at one end of the transmission rod assembly, and the other end of the transmission rod assembly is connected with the hammer core shaft. The machining efficiency and precision of strengthening the inner wall of the inner hole are remarkably improved, the performance of the workpiece is enhanced, and the labor intensity and the production cost are reduced. The method is suitable for workpieces with various complex shapes and long inner holes, and the requirements of the modern manufacturing industry for efficient and high-quality production are met.

Description

Technical Field

[0001] The invention relates to the field of inner wall strengthening, and in particular to an inner hole automatic hammering strengthening device and a use method thereof. Background Art

[0002] Strengthening the inner wall of the inner hole is an important process to improve the surface hardness, fatigue strength and corrosion resistance of the inner wall of the workpiece. It is widely used in aerospace, automobile manufacturing, mechanical processing and other fields. At present, the commonly used methods for strengthening the inner wall of the inner hole include rolling strengthening, shot peening strengthening, laser shock strengthening, ultrasonic shock strengthening, carburizing and nitriding, induction quenching, electroplating and spraying. However, the common problem of these methods in practical applications is low processing efficiency. Especially when dealing with workpieces with complex shapes and long inner holes, the existing strengthening methods often require a lot of time and manpower, which is difficult to meet the needs of modern manufacturing industry for efficient and automated production. Summary of the invention

[0003] The main purpose of the present invention is to provide an inner hole automatic hammer strengthening device and a use method to solve the problems in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: comprising a hammering device installed on the tailstock of a machine tool, a plurality of hammering heads for radial reciprocating movement are arranged on the peripheral side of the end of the hammering device, the hammering heads are placed in the workpiece installed on the chuck of the machine tool to hammer and strengthen the inner wall thereof, a sliding support seat is arranged on the slide rail of the machine tool, and the sliding support seat is used to support the hammering device; The hammering device includes a transmission rod assembly sliding inside a shell assembly, the shell assembly includes an outer tube and a transition tube, a hammer sleeve is fixedly provided at the end of the transition tube, an end cover is fixedly provided at the end of the hammer sleeve, a sliding hammer core shaft is provided inside the hammer sleeve, the bottom of the hammer head is stuck on the hammer core shaft and slides, a pneumatic linear vibrator is provided at one end of the transmission rod assembly, and the other end is connected to the hammer core shaft.

[0005] Preferably, a bottom tube is fixedly provided at the end of the outer tube, the end of the bottom tube is fixed on the tailstock of the machine tool, and the linear vibrator is installed in the bottom tube.

[0006] Preferably, the transmission rod assembly includes a transmission rod, an extension rod and a connecting rod connected in sequence, the end of the transmission rod is fixedly connected to the hammer core shaft, a ball sleeve is provided between the hammer core shaft and the hammer sleeve, and the hammer core shaft slides against the hammer sleeve through the ball sleeve.

[0007] Preferably, a plurality of linear bearing supports are provided in the outer tube, and the extension rod in the transmission rod assembly slides against the linear bearing supports.

[0008] Preferably, a boss is fixedly provided on the outer side of the end of the connecting rod, a fixing ring is fixedly provided inside the outer tube, a spring is provided between the fixing ring and the boss, and the spring is sleeved on the connecting rod, one end of the spring abuts against the boss, and the other end abuts against the fixing ring; A first pressing block is fixedly arranged at the tail of the connecting rod, a second pressing block is fixedly arranged at the end of the linear vibrator, the second pressing block is coaxially arranged with the first pressing block, and the second pressing block abuts against the first pressing block.

[0009] Preferably, a plurality of inclined surfaces are provided on the outer side of the end of the hammer core shaft, and a dovetail groove is provided on the inclined surface. A dovetail block is provided at the bottom of the hammer head, and the dovetail block slides against the dovetail groove.

[0010] Preferably, the hammer sleeve and the end cover are provided with a plurality of openings corresponding thereto, the openings are spliced ​​to form a slot, and the hammer head slides in the slot.

[0011] Preferably, a plurality of mounting holes are provided on the top of the sliding seat in the hammer head, an alloy impact head is provided in the mounting hole, the bottom of the alloy impact head is fixed in the mounting hole through a support tube, a pressure cover is provided on the end face of the sliding seat, and both ends of the pressure cover are fixedly connected to the sliding seat by bolts, thereby pressing and fixing the alloy impact head.

[0012] Preferably, a fixed seat is fixed at the tail of the machine tool, a motor is fixed on the fixed seat, a rotating screw is provided between the slide rails of the machine tool, one end of the screw is connected to the output shaft of the motor, and the other end rests on the machine tool for rotation through a bearing seat, and the bottom of the tail seat is threadedly connected to the screw through a thread sleeve.

[0013] A method for using an inner hole automatic hammer strengthening device, the method steps are as follows: S1. The workpiece is fixedly mounted on the chuck, the hammering device is fixedly mounted on the tailstock, and a plurality of sliding support seats are set up in the middle of the hammering device to ensure that the workpiece, the hammering device and the sliding support seat are coaxially arranged; S2, the motor drives the screw to rotate, so that the tailstock drives the hammer device to move into the workpiece; S3, start the pneumatic linear vibrator to push the transmission rod assembly, and under the action of the spring, quickly drive the alloy impact head on the hammer head to hammer and strengthen the inner wall of the workpiece; S4. The machine tool drives the chuck to rotate the workpiece synchronously, and the motor drives the hammer device to feed, so that the hammer of the alloy impact head covers the entire inner wall of the workpiece.

[0014] The present invention provides an inner hole automatic hammer strengthening device and a use method, with the following beneficial effects: 1. The motor drives the movement of the screw rod and the tailstock to achieve precise feeding of the hammer device, and cooperates with the rotation of the workpiece to ensure that the hammer head can evenly cover the entire inner wall of the workpiece, greatly improving the processing efficiency. Through the cooperation of the pneumatic linear vibrator and the spring, the hammer head can achieve rapid reciprocating motion, significantly shortening the time of a single hammering and improving the overall processing speed.

[0015] 2. The motor-driven screw system ensures the precise movement of the tailstock, allowing the hammer device to accurately enter the inner hole of the workpiece, improving the processing accuracy. The design of the sliding support seat and the slot ensures that the radial movement path of the hammer head is accurate, improving the uniformity and stability of the strengthening effect.

[0016] 3. The alloy impact heads in the hammer head are arranged in multiple rows, and there are arcs between the multiple rows, which can better match the shape of the inner wall of the workpiece and ensure the uniformity and effectiveness of the hammering. It is suitable for workpieces of various shapes and sizes, especially those with complex shapes and long inner holes, and can achieve efficient and uniform inner wall strengthening.

[0017] 4. Through the radial movement of the hammer head, the inner wall of the workpiece is plastically deformed, forming compressive residual stress, which significantly improves the surface hardness and fatigue strength of the inner wall of the workpiece. The formation of compressive residual stress helps to improve the corrosion resistance of the inner wall of the workpiece and extend the service life of the workpiece.

[0018] 5. The entire hammer strengthening process is automated, which reduces manual intervention, reduces labor intensity, and improves production safety and reliability. Efficient inner hole hammer strengthening can be achieved through simple settings and startup, which is easy to operate and master. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front view of the overall structure of the present invention; Figure 2 The present invention Figure 1 A partial front cross-sectional view of Figure 3 is a front cross-sectional view of the hammering device of the present invention; Figure 4 It is a side view of the hammer core shaft of the present invention; Figure 5 It is a front cross-sectional view of the connection between the hammer sleeve and the end cover of the present invention; Figure 6 is a top view of the hammer head of the present invention; Figure 7 The present invention Figure 6 AA section view in; Figure 8 The present invention Figure 6BB section view in; In the figure: bottom tube 1; outer tube 2; transition tube 3; hammer sleeve 4; hammer core shaft 5; inclined surface 501; dovetail groove 502; hammer head 6; pressure cover 601; alloy impact head 602; locking bolt 603; sliding seat 604; dovetail block 605; support tube 606; end cover 7; ball bushing 8; transmission rod 9; extension rod 10; linear bearing support 11; fixing ring 12; connecting rod 13; spring 14; first pressure block 15; second pressure block 16; pneumatic linear vibrator 17; slide rail 18; chuck 19; tailstock 20; motor 21; workpiece 22; screw rod 23; screw sleeve 24; fixed seat 25; sliding support seat 26; slot 27. DETAILED DESCRIPTION

[0020] Example 1 like Figures 1 to 8 As shown, an automatic hammering strengthening device for inner holes comprises a hammering device mounted on a machine tool tailstock 20, a plurality of radially reciprocating hammering heads 6 are arranged around the end of the hammering device, the hammering heads 6 are placed in a workpiece 22 mounted on a machine tool chuck 19 to hammer and strengthen the inner wall thereof, a sliding support seat 26 is arranged on a machine tool slide rail 18, and the sliding support seat 26 is used to support the hammering device; The hammering device includes a transmission rod assembly sliding in a shell assembly, the shell assembly includes an outer tube 2 and a transition tube 3, a hammer sleeve 4 is fixedly provided at the end of the transition tube 3, an end cover 7 is fixedly provided at the end of the hammer sleeve 4, a sliding hammer core shaft 5 is provided in the hammer sleeve 4, the bottom of the hammer head 6 is stuck on the hammer core shaft 5 and slides, a pneumatic linear vibrator 17 is provided at one end of the transmission rod assembly, and the other end is connected to the hammer core shaft 5.

[0021] The workpiece 22 is mounted on the machine tool chuck 19 for rotation, and the hammering device is mounted on the machine tool tailstock 20. The movement of the tailstock 20 drives the hammering device to feed. The multiple radially reciprocating hammering heads 6 at the end of the hammering device act on the inner wall of the workpiece 22, so that it can be hammered and strengthened. Through the rotation of the workpiece 22 and the feeding of the hammering device, the hammering head 6 can cover the entire inner wall of the workpiece 22, and the automated control processing is more efficient. The pneumatic linear vibrator 17 in the hammering device can drive the hammer core shaft 5 through the transmission rod assembly, thereby driving the hammering head 6 to move radially and act on the inner wall of the workpiece 22; the housing assembly and the transmission rod assembly are used for lengthening, and are customized according to the length of the workpiece 22, so that the hammering head 6 at the end can enter the interior of the workpiece 22.

[0022] The hammer device is installed on the tailstock of the machine tool, and a plurality of hammer heads that can move radially reciprocating are arranged around the end of the hammer device. These hammer heads can enter the inner hole of the workpiece to hammer and strengthen the inner wall of the workpiece.

[0023] A sliding support seat is provided on the machine tool slide rail to support the hammer device and allow it to move along the slide rail to meet the needs of workpieces of different lengths. The transmission rod assembly includes one or more parts that can slide in the housing assembly, wherein the housing assembly is composed of an outer tube, a transition tube, etc. A hammer sleeve is fixed at one end of the transition tube, and an end cover is fixed at one end of the hammer sleeve. A slidable hammer core shaft is provided inside the hammer sleeve, and the bottom of the hammer head is designed to slide along the hammer core shaft.

[0024] The pneumatic linear vibrator is located at one end of the transmission rod assembly and is used to provide power. The power is transmitted to the hammer core shaft through the transmission rod assembly, and then the hammer head is driven to move radially to achieve hammer strengthening of the inner wall of the workpiece.

[0025] The workpiece is mounted on the machine chuck and can rotate, while the hammer device is mounted on the tailstock of the machine. The hammer device is driven forward or backward by adjusting the position of the tailstock, and the hammer head can evenly cover every part of the inner wall of the workpiece in coordination with the rotation of the workpiece.

[0026] Preferably, a bottom tube 1 is fixedly provided at the end of the outer tube 2, the end of the bottom tube 1 is fixed on the tailstock 20 of the machine tool, and the linear vibrator 17 is installed in the bottom tube 1. The end of the bottom tube 1 is fixedly connected to the tailstock 20 by a flange and bolts, and the linear vibrator 17 is installed in the bottom tube 1 and arranged coaxially with the transmission rod assembly.

[0027] The bottom tube 1 is the basic structure of the whole hammering device, one end of which is fixed to the end of the outer tube 2, and the other end is fixed to the tailstock 20 of the machine tool through a flange and bolts. Such a design not only provides a stable support, but also facilitates the installation and disassembly of the device.

[0028] The linear vibrator 17 is installed in the bottom tube 1 and is coaxially arranged with the transmission rod assembly. This means that the vibration generated by the linear vibrator can be directly and effectively transmitted to the transmission rod assembly, thereby driving the hammer head 6 on the hammer core shaft 5 to move radially. This layout optimizes the power transmission path, reduces energy loss, and improves hammering efficiency.

[0029] Preferably, the transmission rod assembly includes a transmission rod 9, an extension rod 10 and a connecting rod 13 connected in sequence, the end of the transmission rod 9 is fixedly connected to the hammer core shaft 5, a ball sleeve 8 is provided between the hammer core shaft 5 and the hammer sleeve 4, and the hammer core shaft 5 slides in the hammer sleeve 4 through the ball sleeve 8.

[0030] The extension rod 10 and the outer tube 2 are matched and customized according to the length of the workpiece 22, so that the hammer head 6 can enter the interior of the workpiece 22, the reciprocating movement of the transmission rod 9 drives the hammer core shaft 5 to move, and the ball sleeve 8 can ensure that the hammer core shaft 5 moves more smoothly and reliably.

[0031] Preferably, a plurality of linear bearing supports 11 are provided in the outer tube 2 , and the extension rod 10 in the transmission rod assembly slides against the linear bearing supports 11 .

[0032] The extension rod 10 is supported by a plurality of linear bearings 11 for sliding in the outer tube 2 to ensure smooth and reliable movement.

[0033] Preferably, a boss is fixedly provided on the outer side of the end of the connecting rod 13, a fixing ring 12 is fixedly provided inside the outer tube 2, a spring 14 is provided between the fixing ring 12 and the boss, and the spring 14 is sleeved on the connecting rod 13, one end of the spring 14 abuts on the boss, and the other end abuts on the fixing ring 12; A first pressing block 15 is fixedly disposed at the tail of the connecting rod 13 , and a second pressing block 16 is fixedly disposed at the end of the linear vibrator 17 . The second pressing block 16 is coaxially arranged with the first pressing block 15 , and the second pressing block 16 abuts against the first pressing block 15 .

[0034] The linear vibrator 17 pushes the first pressure block 15 through the second pressure block 16, thereby driving the connecting rod 13 to move, and the connecting rod 13 is reset through the rebound force of the spring 14, so that the hammer core shaft 5 can move back and forth, and then the hammer sleeve 4 reciprocates and hammers on the inner wall of the workpiece 22.

[0035] The linear vibrator 17 generates high-frequency vibration, and pushes the first pressing block 15 through the second pressing block 16. The first pressing block 15 transmits the vibration to the connecting rod 13, so that the connecting rod 13 moves forward. The movement of the connecting rod 13 is transmitted to the hammer core shaft 5 through the transmission rod 9 and the extension rod 10, so that the hammer core shaft 5 slides in the hammer sleeve 4.

[0036] When the vibration of the linear vibrator 17 stops, the rebound force of the spring 14 resets the connecting rod 13. The reset of the connecting rod 13 is transmitted to the hammer core shaft 5 through the transmission rod 9 and the extension rod 10, so that the hammer core shaft 5 returns to the initial position.

[0037] The reciprocating movement of the hammer core shaft 5 drives the hammer head 6 to move radially, and hammers and strengthens the inner wall of the workpiece 22. The workpiece 22 is mounted on the machine tool chuck 19 and rotates, and the hammer device is mounted on the machine tool tailstock 20. Through the movement of the tailstock 20, the hammer device is fed along the inner wall of the workpiece 22, and the hammer head 6 hammers and strengthens the inner wall of the workpiece 22. The rotation of the workpiece 22 and the feeding of the hammer device are combined to ensure that the hammer head 6 can evenly cover the entire inner wall of the workpiece 22.

[0038] Preferably, a plurality of inclined surfaces 501 are provided on the outer side of the end of the hammer core shaft 5 , and a dovetail groove 502 is provided on the inclined surface 501 . A dovetail block 605 is provided at the bottom of the hammer head 6 , and the dovetail block 605 slides against the dovetail groove 502 .

[0039] The axial reciprocating movement of the hammer core shaft 5 is converted into the radial movement of the hammer head 6 through the dovetail fit on the inclined surface 501 .

[0040] When the hammer core shaft 5 moves axially back and forth, the inclined surface 501 at its end pushes the dovetail block 605 at the bottom of the hammer head 6. Due to the cooperation between the dovetail block 605 and the dovetail groove 502, the hammer head 6 moves radially under the guidance of the inclined surface 501. The angle of the inclined surface 501 determines the amplitude of the radial movement of the hammer head 6, thereby realizing efficient conversion from axial movement to radial movement.

[0041] Preferably, the hammer sleeve 4 and the end cover 7 are provided with a plurality of openings corresponding thereto, the openings are spliced ​​to form a slot 27, and the hammer head 6 slides in the slot 27. The hammer head 6 is restricted by the slot 27, so that the radial movement of the hammer head 6 can be ensured.

[0042] The hammer sleeve 4 and the end cover 7 are provided with a plurality of openings, which are spliced ​​to form a slot 27. The slot 27 is designed to limit and guide the radial movement of the hammer head 6 to ensure that it slides within a predetermined trajectory. The hammer head 6 is located in the slot 27, and the accuracy and stability of its radial movement can be guaranteed by the restriction of the slot 27. The bottom of the hammer head 6 is provided with a dovetail block 605, which cooperates with the dovetail groove 502 on the hammer core shaft 5 to achieve the conversion from axial movement to radial movement.

[0043] Preferably, a plurality of mounting holes are provided on the top of the sliding seat 604 in the hammer head 6, and an alloy impact head 602 is provided in the mounting hole. The bottom of the alloy impact head 602 is fixed in the mounting hole through a support tube 606, and a pressure cover 601 is provided on the end face of the sliding seat 604. Both ends of the pressure cover 601 are fixedly connected to the sliding seat 604 by bolts, thereby pressing and fixing the alloy impact head 602.

[0044] The support cylinder 606 can adjust the protruding height of the alloy impact head 602, and the connection between the pressure cover 601 and the sliding seat 604 is used to press and fix the alloy impact head 602. Further preferably, the alloy impact heads 602 are arranged in multiple rows, and there is an arc between the multiple rows of alloy impact heads 602 to match the arc of the inner wall of the workpiece 22.

[0045] Preferably, a fixed seat 25 is fixed at the tail of the machine tool, a motor 21 is fixed on the fixed seat 25, a rotating screw rod 23 is provided between the slide rails 18 of the machine tool, one end of the screw rod 23 is connected to the output shaft of the motor 21, and the other end is rotated against the machine tool through a bearing seat, and the bottom of the tail stock 20 is threadedly connected to the screw rod 23 through a threaded sleeve 24.

[0046] The motor 21 can drive the screw rod 23 to rotate, thereby driving the tailstock 20 and the hammering device to feed, and cooperate with the rotation of the machine tool chuck 19 to realize automatic control, and can automatically hammer the inner wall of the workpiece 22.

[0047] Example 2 like Figures 1 to 3 As shown, in combination with Example 1, a method for using an inner hole automatic hammer strengthening device is further described: the method steps are as follows: Step S1: Installation of workpiece and device: Workpiece fixing: The workpiece 22 is fixedly mounted on the machine tool chuck 19, ensuring that the workpiece 22 is firm and centered; Installation of hammer device: The hammer device is fixedly installed on the tailstock 20 of the machine tool, and the hammer device is ensured to be coaxial with the workpiece 22; Sliding support seat installation: A plurality of sliding support seats 26 are installed in the middle of the hammering device to ensure that the workpiece 22, the hammering device and the sliding support seat 26 are coaxially arranged to reduce vibration and improve stability.

[0048] Step S2: Feeding of hammering device: The motor 21 is started, and the output shaft of the motor 21 drives the screw rod 23 to rotate; The rotation of the screw rod 23 is converted into a linear movement of the tailstock 20 through the screw sleeve 24 , so that the tailstock 20 drives the hammer device to move into the workpiece 22 .

[0049] Step S3: Starting the hammer head: The pneumatic linear vibrator 17 is started, and the vibration generated by the vibrator pushes the first pressing block 15 through the second pressing block 16, thereby driving the connecting rod 13 to move; The movement of the connecting rod 13 is transmitted to the hammer core shaft 5 through the transmission rod 9 and the extension rod 10, so that the hammer core shaft 5 slides in the hammer sleeve 4; The axial reciprocating movement of the hammer core shaft 5 is converted into the radial movement of the hammer head 6 through the cooperation of the inclined surface 501 and the dovetail groove 502; The alloy impact head 602 performs hammering strengthening on the inner wall of the workpiece 22 under the radial movement of the hammer head 6; Under the action of the spring 14, the connecting rod 13 is reset, so that the hammer core shaft 5 and the hammer head 6 are restored to the initial position, realizing a rapid reciprocating hammering action.

[0050] Step S4: Rotation of the workpiece and feeding of the hammering device Workpiece rotation: synchronously start the machine tool, drive the chuck 19 to drive the workpiece 22 to rotate, and ensure that all parts of the inner wall of the workpiece 22 can be hammered evenly; Feeding of the hammering device: The tailstock 20 and the hammering device are continuously driven by the motor 21 to move along the slide rail 18 and feed gradually to ensure that the hammering of the alloy impact head 602 covers the entire inner wall of the workpiece 22 .

[0051] Ensure that the workpiece 22, the hammering device and the sliding support seat 26 are coaxially arranged to reduce vibration and improve stability. Through the drive of the motor 21 and the screw 23, the tailstock 20 is accurately moved to ensure that the hammering device can accurately enter the workpiece 22. Through the cooperation of the pneumatic linear vibrator 17 and the spring 14, the hammering head 6 can be quickly reciprocated to ensure the high efficiency of the hammering. Through the rotation of the workpiece 22 and the feeding of the hammering device, it is ensured that the alloy impact head 602 can evenly cover the entire inner wall of the workpiece 22.

[0052] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An automatic hammer strengthening device for inner holes, characterized by: The invention comprises a hammering device mounted on a tailstock (20) of a machine tool, a plurality of hammering heads (6) which are capable of radially reciprocating movement are arranged on the peripheral side of the end of the hammering device, the hammering heads (6) are placed in a workpiece (22) mounted on a machine tool chuck (19) to hammer and strengthen the inner wall of the workpiece, and a sliding support seat (26) is arranged on a machine tool slide rail (18), and the sliding support seat (26) is used to support the hammering device; The hammer device comprises a transmission rod assembly sliding in a housing assembly, the housing assembly comprising an outer tube (2) and a transition tube (3), a hammer sleeve (4) being fixedly provided at the end of the transition tube (3), an end cover (7) being fixedly provided at the end of the hammer sleeve (4), a sliding hammer core shaft (5) being provided in the hammer sleeve (4), a bottom of a hammer head (6) being clamped on the hammer core shaft (5) and sliding, a pneumatic linear vibrator (17) being provided at one end of the transmission rod assembly, and the other end being connected to the hammer core shaft (5).

2. According to claim 1, the inner hole automatic hammer strengthening device is characterized by: A bottom tube (1) is fixedly arranged at the end of the outer tube (2), the end of the bottom tube (1) is fixed on a tailstock (20) of a machine tool, and a linear vibrator (17) is installed in the bottom tube (1).

3. According to claim 1, the inner hole automatic hammer strengthening device is characterized by: The transmission rod assembly comprises a transmission rod (9), an extension rod (10) and a connecting rod (13) which are connected in sequence. The end of the transmission rod (9) is fixedly connected to the hammer core shaft (5). A ball bushing (8) is provided between the hammer core shaft (5) and the hammer sleeve (4). The hammer core shaft (5) slides against the inside of the hammer sleeve (4) via the ball bushing (8).

4. According to claim 1, the inner hole automatic hammer strengthening device is characterized by: A plurality of linear bearing supports (11) are arranged in the outer tube (2), and the extension rod (10) in the transmission rod assembly abuts against and slides in the linear bearing supports (11).

5. According to claim 3, the inner hole automatic hammer strengthening device is characterized by: A boss is fixedly provided on the outer side of the end of the connecting rod (13); a fixing ring (12) is fixedly provided inside the outer tube (2); a spring (14) is provided between the fixing ring (12) and the boss; the spring (14) is sleeved on the connecting rod (13), one end of the spring abuts against the boss, and the other end of the spring abuts against the fixing ring (12); A first pressing block (15) is fixedly provided at the tail of the connecting rod (13), and a second pressing block (16) is fixedly provided at the end of the linear vibrator (17); the second pressing block (16) is coaxially arranged with the first pressing block (15), and the second pressing block (16) abuts against the first pressing block (15).

6. The inner hole automatic hammer strengthening device according to claim 1, characterized in that: A plurality of inclined surfaces (501) are arranged on the outer side of the end of the hammer core shaft (5), a dovetail groove (502) is arranged on the inclined surface (501), a dovetail block (605) is arranged at the bottom of the hammer head (6), and the dovetail block (605) abuts against and slides in the dovetail groove (502).

7. The inner hole automatic hammer strengthening device according to claim 1, characterized in that: The hammer sleeve (4) and the end cover (7) are provided with a plurality of openings corresponding thereto, the openings are spliced ​​to form a slot (27), and the hammer head (6) is located in the slot (27) and slides.

8. The inner hole automatic hammer strengthening device according to claim 1, characterized in that: A plurality of mounting holes are provided on the top of the sliding seat (604) in the hammer head (6), an alloy impact head (602) is provided in the mounting hole, the bottom of the alloy impact head (602) is fixed in the mounting hole via a support tube (606), a pressure cover (601) is provided on the end surface of the sliding seat (604), and both ends of the pressure cover (601) are fixedly connected to the sliding seat (604) via bolts, thereby pressing and fixing the alloy impact head (602).

9. The inner hole automatic hammer strengthening device according to claim 1, characterized in that: A fixed seat (25) is fixedly provided at the tail of the machine tool, a motor (21) is fixedly provided on the fixed seat (25), a rotating screw rod (23) is provided between the slide rails (18) of the machine tool, one end of the screw rod (23) is connected to the output shaft of the motor (21), and the other end is supported on the machine tool for rotation through a bearing seat, and the bottom of the tailstock (20) is threadedly connected to the screw rod (23) through a threaded sleeve (24).

10. A method for using the inner hole automatic hammering strengthening device according to any one of claims 1 to 9, wherein the method steps are as follows: S1, the workpiece (22) is fixedly mounted on the chuck (19), the hammering device is fixedly mounted on the tailstock (20), and a plurality of sliding support seats (26) are set up in the middle of the hammering device to ensure that the workpiece (22), the hammering device and the sliding support seat (26) are coaxially arranged; S2, driving the screw rod (23) to rotate by the motor (21), so that the tailstock (20) drives the hammer device to move into the workpiece (22); S3, starting the pneumatic linear vibrator (17) to push the transmission rod assembly, and under the action of the spring (14), quickly driving the alloy impact head (602) on the hammer head (6) to hammer and strengthen the inner wall of the workpiece (22); S4. The workpiece (22) is driven to rotate by the machine tool driving chuck (19), and the motor (21) drives the hammering device to feed, so that the hammering of the alloy impact head (602) covers the entire inner wall of the workpiece (22).

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