A reciprocating hammer strengthening device for inner hole surface

Abstract

The present invention provides a reciprocating hammer strengthening device for the surface of an inner hole, comprising a shell assembly and a transmission rod assembly, wherein the shell assembly comprises a transition tube and an outer tube connected in sequence, wherein a hammer sleeve is fixedly provided at the end of the transition tube, wherein a sliding hammer core shaft is provided in the hammer sleeve, wherein a bottom tube is fixedly provided at the end of the outer tube, wherein a pneumatic linear vibrator is provided in the bottom tube; wherein a plurality of sliding hammer heads are provided on the outer side of the hammer core shaft, wherein the hammer heads are located at the end of the shell assembly and move radially. The reciprocating hammer strengthening device for the surface of an inner hole ensures its stability and precision in high-frequency reciprocating motion through a carefully designed connection method, support structure, power transmission mechanism and structure of the hammer head. These designs not only improve the reliability of the device, but also extend its service life, making it perform well in a variety of industrial applications.

Description

Technical Field

[0001] The invention relates to the field of surface treatment, in particular to an inner hole surface reciprocating hammering strengthening device. 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 a reciprocating hammer strengthening device for the inner hole surface 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: comprising a housing assembly and a transmission rod assembly, the housing assembly comprising a transition tube and an outer tube connected in sequence, a hammer sleeve is fixedly provided at the end of the transition tube, a sliding hammer core shaft is provided in the hammer sleeve, a bottom tube is fixedly provided at the end of the outer tube, and a pneumatic linear vibrator is provided in the bottom tube; 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 fixing ring is fixed in the outer tube, the connecting rod slides in the fixing ring, a spring is sleeved on the outer side of the connecting rod, one end of the spring abuts on the fixing ring, and the other end abuts on the boss on the outer side of the connecting rod, the pneumatic linear vibrator is coaxially arranged with the transmission rod assembly, and the pneumatic linear vibrator pushes on the end of the connecting rod; A plurality of sliding hammer heads are arranged on the outer side of the hammer core shaft, and the hammer heads are located at the ends of the housing components and move radially.

[0005] Preferably, the transition tube is connected to the hammer sleeve via a rectangular thread, a ball sleeve is provided between the hammer sleeve and the hammer core shaft, and the hammer core shaft slides against the hammer sleeve via the ball sleeve.

[0006] Preferably, an end cover is fixedly provided at the end of the hammer sleeve, and a plurality of openings corresponding to the end cover and the hammer sleeve are provided, and the openings are spliced ​​to form a slot, and the hammer head is located in the slot and moves.

[0007] Preferably, the outer tube and the transition tube are connected via rectangular threads, a plurality of linear bearing supports are provided between the outer tube and the extension rod, and the extension rod slides against the outer tube via the linear bearing supports.

[0008] Preferably, a first pressing block and a second pressing block are provided on a side of the connecting rod opposite to the pneumatic linear vibrator, and the pneumatic linear vibrator drives the second pressing block to push on 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, a dovetail groove is provided in the middle of the inclined surface, and a dovetail block is fixed on the inclined surface at the bottom of the hammer head, and the dovetail block slides against the dovetail groove.

[0010] Preferably, a pressure cover is fixedly provided on the sliding seat in the hammer head, and a plurality of protruding alloy impact heads are provided between the pressure cover and the sliding seat.

[0011] Preferably, a plurality of alloy impact heads are arranged in an array, with each row arranged in a staggered manner, and the alloy impact heads in each row are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece.

[0012] Preferably, a plurality of mounting holes are provided on the sliding seat, the bottom of the alloy impact head is against the mounting hole through a support tube, the alloy impact head is T-shaped, and both ends of the pressure cover are fixedly connected to the sliding seat by bolts, and the pressure cover is used to press and fix the alloy impact head on the sliding seat.

[0013] Preferably, the end of the alloy impact head is an arc-shaped ball head.

[0014] The present invention provides a reciprocating hammer strengthening device for inner hole surface, which has the following beneficial effects: 1. The outer tube and the transition tube are connected by rectangular threads, which provide stable connection and good sealing performance, ensuring the stability of the device in high-frequency reciprocating motion. Multiple linear bearing supports are provided between the outer tube and the extension rod to reduce friction, provide high-precision guidance, and ensure that the extension rod maintains linearity during movement to avoid deviation and shaking.

[0015] 2. The first and second pressure blocks are provided on the side of the connecting rod opposite to the pneumatic linear vibrator to ensure the high efficiency and stability of power transmission. This design can also absorb part of the impact force, reduce the impact of mechanical shock on the device, and extend the service life of the device.

[0016] 3. There are multiple inclined surfaces on the outer side of the end of the hammer core shaft, and a dovetail groove is provided in the middle of the inclined surface. A dovetail block is fixed on the inclined surface at the bottom of the hammer head, and the dovetail block slides against the dovetail groove. This design ensures that the radial movement path of the hammer head is precisely controllable, avoids unnecessary lateral deviation, and improves the accuracy and consistency of hammering.

[0017] 4. Multiple alloy impact heads are arranged in an array, with each row staggered. The alloy impact heads in each row are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece. This design ensures the uniform distribution of the hammer heads on the inner wall of the workpiece and improves the coverage and uniformity of the hammering.

[0018] 5. The end of the alloy impact head is an arc-shaped ball head. This design can not only better adapt to the curvature of the inner wall of the workpiece, but also reduce the damage to the inner wall of the workpiece and improve the accuracy and effect of hammering.

[0019] 6. The design of linear bearing support and dovetail structure reduces friction and wear, prolongs the service life of the device, and reduces maintenance frequency and cost. The contact surface between the first pressing block and the second pressing block can be designed to have a certain elastic material to absorb part of the impact force, reduce the impact of mechanical shock on the device, and prolong the service life of the device.

[0020] 8. The coordinated work of the pneumatic linear vibrator and the transmission rod assembly, as well as the design of the bevel and dovetail groove, ensures that the hammer head can hammer the inner wall of the workpiece efficiently and accurately, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front cross-sectional view of the overall structure of the present invention; Figure 2 It is a side view of the hammer core shaft of the present invention; Figure 3 It is a front cross-sectional view of the connection between the hammer sleeve and the end cover of the present invention; Figure 4 is a top view of the hammer head of the present invention; Figure 5 The present invention Figure 4 Middle AA section view; Figure 6 The present invention Figure 4 Middle BB section view; 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; slot 18. DETAILED DESCRIPTION

[0022] like Figures 1 to 6 As shown, a reciprocating hammer strengthening device for inner hole surface comprises a shell assembly and a transmission rod assembly, the shell assembly comprises a transition pipe 3 and an outer pipe 2 connected in sequence, a hammer sleeve 4 is fixedly arranged at the end of the transition pipe 3, a sliding hammer core shaft 5 is arranged in the hammer sleeve 4, a bottom pipe 1 is fixedly arranged at the end of the outer pipe 2, a pneumatic linear vibrator 17 is arranged in the bottom pipe 1; The transmission rod assembly includes 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 fixing ring 12 is fixedly arranged in the outer tube 2. The connecting rod 13 slides in the fixing ring 12. A spring 14 is sleeved on the outer side of the connecting rod 13. One end of the spring 14 abuts against the fixing ring 12, and the other end abuts against the boss on the outer side of the connecting rod 13. A pneumatic linear vibrator 17 is coaxially arranged with the transmission rod assembly, and the pneumatic linear vibrator 17 pushes on the end of the connecting rod 13. A plurality of sliding hammer heads 6 are arranged on the outer side of the hammer core shaft 5. The hammer heads 6 are located at the end of the housing component and move radially.

[0023] The pneumatic linear vibrator 17 is used to push the transmission rod assembly to move, thereby driving the hammer core shaft 5 to move, and then the hammer head 6 to move radially. The spring 14 rebounds after compression to drive the transmission rod assembly to reset, so that the hammer head 6 can move back and forth to hammer the inner wall of the workpiece.

[0024] The pneumatic linear vibrator is used as a power source. The pneumatic linear vibrator 17 is installed inside the bottom tube 1, and generates linear motion through gas pressure to push the connecting rod 13 forward. The transmission rod assembly consists of a transmission rod 9, an extension rod 10 and a connecting rod 13, wherein one end of the transmission rod 9 is fixedly connected to the hammer core shaft 5. When the pneumatic linear vibrator 17 is in motion, it transmits force to the entire transmission rod assembly through the connecting rod 13, causing the hammer core shaft 5 to move accordingly.

[0025] The spring 14 is mounted on the outside of the connecting rod 13, one end of which abuts against the fixing ring 12, and the other end abuts against the boss on the connecting rod 13. When the pneumatic linear vibrator 17 stops working or moves in the reverse direction, the restoring force of the spring 14 will reset the transmission rod assembly, ensuring the reciprocating motion during the hammering process.

[0026] The hammer head 6 is installed on the outside of the hammer core shaft 5 and can move radially along the hammer core shaft 5. As the hammer core shaft 5 reciprocates, the hammer head 6 will also hammer the inner wall of the workpiece accordingly to achieve a strengthening effect.

[0027] Preferably, the transition pipe 3 is connected to the hammer sleeve 4 via a rectangular thread, a ball sleeve 8 is provided between the hammer sleeve 4 and the hammer core shaft 5, and the hammer core shaft 5 slides against the hammer sleeve 4 via the ball sleeve 8.

[0028] The transition pipe 3 is connected to the hammer sleeve 4 by a rectangular thread, which provides strong tensile strength and good sealing performance. Compared with ordinary threads, rectangular threads have a larger contact area and can withstand higher loads, while also helping to improve the overall rigidity and stability of the device.

[0029] A ball bushing 8 is provided between the hammer core shaft 5 and the hammer sleeve 4, which helps to reduce the friction between the two, so that the hammer core shaft 5 can slide more smoothly in the hammer sleeve 4. The design of the ball bushing can significantly reduce wear, extend the service life of the device, and ensure high accuracy and efficiency in long-term high-frequency reciprocating motion.

[0030] Preferably, an end cover 7 is fixedly provided at the end of the hammer sleeve 4, and a plurality of openings corresponding thereto are provided on the end cover 7 and the hammer sleeve 4, and the openings are spliced ​​to form a slot 18, and the hammer head 6 is located in the slot 18 and moves.

[0031] The hammer head 6 can convert the axial movement of the hammer core shaft 5 into the radial movement of the hammer head 6 through the restriction of the clamping groove 18 .

[0032] When the pneumatic linear vibrator 17 pushes the transmission rod assembly including the transmission rod 9, the extension rod 10 and the connecting rod 13 to move forward, the hammer core shaft 5 also moves forward. Since the hammer head 6 is located in the slot 18, the geometry of the slot 18 forces the hammer head 6 to move radially while the hammer core shaft 5 moves axially.

[0033] When the hammer core shaft 5 moves forward, the hammer head 6 moves radially under the guidance of the clamping groove 18, contacts the inner wall of the workpiece and performs hammering.

[0034] When the pneumatic linear vibrator 17 stops pushing or moves in the reverse direction, the restoring force of the spring 14 resets the transmission rod assembly, and the hammer core shaft 5 moves backward. At this time, the hammer head 6 moves radially under the guidance of the slot 18 and returns to the initial position.

[0035] Preferably, the outer tube 2 and the transition tube 3 are connected via rectangular threads, and a plurality of linear bearing supports 11 are provided between the outer tube 2 and the extension rod 10 , and the extension rod 10 slides against the outer tube 2 via the linear bearing supports 11 .

[0036] The outer tube 2 is connected to the transition tube 3 by a rectangular thread. The rectangular thread has a large contact area and a high load-bearing capacity, and can provide a stable connection and good sealing performance. This connection method can not only withstand a large axial load, but also effectively prevent loosening, ensuring the stability of the device in high-frequency reciprocating motion.

[0037] A plurality of linear bearing supports 11 are provided between the outer tube 2 and the extension rod 10, and the extension rod 10 slides against the outer tube 2 through these linear bearing supports 11. The linear bearing supports 11 can significantly reduce the friction between the extension rod 10 and the outer tube 2, ensuring that the extension rod 10 slides smoothly and smoothly during reciprocating motion. The linear bearing supports 11 can provide high-precision guidance, ensuring that the extension rod 10 maintains linearity during motion, avoiding deviation and shaking, thereby improving the motion accuracy of the entire device. By reducing friction and wear, the linear bearing supports 11 can significantly extend the service life of the device and reduce maintenance frequency and cost.

[0038] Preferably, a first pressing block 15 and a second pressing block 16 are provided on a side of the connecting rod 13 opposite to the pneumatic linear vibrator 17 , and the pneumatic linear vibrator 17 drives the second pressing block 16 to push on the first pressing block 15 .

[0039] The thrust generated by the pneumatic linear vibrator 17 is transmitted to the first pressure block 15 through the second pressure block 16, and then transmitted to the connecting rod 13 by the first pressure block 15. This design ensures the high efficiency and stability of power transmission. The contact surface between the first pressure block 15 and the second pressure block 16 can be designed to have a certain elasticity to absorb part of the impact force, reduce the impact of mechanical shock on the device, and extend the service life of the device. By adjusting the position of the first pressure block 15 and the second pressure block 16, the stroke of the transmission rod assembly can be easily adjusted to adapt to different workpieces and process requirements, and it is also convenient for maintenance and replacement of parts.

[0040] Preferably, a plurality of inclined surfaces 501 are provided on the outer side of the end of the hammer core shaft 5, a dovetail groove 502 is provided in the middle of the inclined surface 501, and a dovetail block 605 is fixed on the inclined surface at the bottom of the hammer head 6, and the dovetail block 605 slides against the dovetail groove 502.

[0041] The hammer core shaft 5 is connected to the hammer head 6 via an inclined surface and a dovetail structure, so that the linear movement of the hammer core shaft 5 can be converted into the radial movement of the hammer head 6 .

[0042] A plurality of inclined surfaces 501 are provided on the outer side of the end of the hammer core shaft 5. These inclined surfaces are designed to convert the axial movement of the hammer core shaft 5 into the radial movement of the hammer head 6. A dovetail groove 502 is provided in the middle of each inclined surface 501. The design of the dovetail groove 502 not only provides precise guidance, but also ensures that the hammer head 6 will not fall off during the movement. A dovetail block 605 is fixedly provided on the inclined surface at the bottom of the hammer head 6, and the dovetail block 605 slides against the dovetail groove 502. The cooperation between the dovetail block 605 and the dovetail groove 502 ensures the stable sliding of the hammer head 6 on the inclined surface 501.

[0043] When the pneumatic linear vibrator 17 pushes the connecting rod 13 to move forward, the connecting rod 13 drives the hammer core shaft 5 to move forward through the transmission rod 9 and the extension rod 10. When the inclined surface 501 of the hammer core shaft 5 moves forward, the axial movement is converted into the radial movement of the hammer head 6 through the cooperation of the dovetail block 605 and the dovetail groove 502.

[0044] The hammer head 6 moves radially under the restriction of the slot 18, contacts the inner wall of the workpiece and performs hammering. When the pneumatic linear vibrator 17 stops pushing or moves in the reverse direction, the restoring force of the spring 14 resets the transmission rod assembly and the hammer core shaft 5 moves backward. At this time, the hammer head 6 moves radially under the cooperation of the dovetail block 605 and the dovetail slot 502 and returns to the initial position.

[0045] Preferably, a pressure cover 601 is fixedly provided on the sliding seat 604 in the hammer head 6 , and a plurality of protruding alloy impact heads 602 are provided between the pressure cover 601 and the sliding seat 604 .

[0046] A plurality of alloy impact heads 602 are arranged in an array, with each row arranged in a staggered manner. The alloy impact heads 602 in each row are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece.

[0047] The sliding seat 604 is provided with multiple mounting holes, and the bottom of the alloy impact head 602 is against the mounting hole through the support tube 606. The alloy impact head 602 is T-shaped, and the two ends of the pressure cover 601 are fixedly connected to the sliding seat 604 by bolts. The pressure cover 601 is used to press and fix the alloy impact head 602 on the sliding seat 604.

[0048] The end of the alloy impact head 602 is an arc-shaped ball head.

[0049] The sliding seat 604 is the main supporting structure of the hammer head 6, and is provided with a plurality of mounting holes for fixing the alloy impact head 602. The pressure cover 601 is fixed on the sliding seat 604 and connected by bolts to press and fix the alloy impact head 602 on the sliding seat 604.

[0050] A plurality of alloy impact heads 602 are arranged in an array on a sliding seat 604, with each row arranged in a staggered manner. The alloy impact heads 602 in each row are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece. The alloy impact head 602 is T-shaped, and the bottom is against the mounting hole of the sliding seat 604 through a support tube 606.

[0051] The support tube 606 is used to support the alloy impact head 602 to ensure its stability and positioning in the sliding seat 604. The length of the support tube 606 can be adjusted to adjust the protruding height of the corresponding alloy impact head 602.

[0052] Multiple alloy impact heads 602 are arranged in an array, and each row is staggered, which ensures that the hammer heads 602 are evenly distributed on the inner wall of the workpiece, thereby improving the coverage and uniformity of the hammering.

[0053] The alloy impact heads 602 of each row are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece, ensure the fit between the hammer head 602 and the inner wall of the workpiece, and improve the hammering effect.

[0054] The alloy impact head 602 is T-shaped, and its bottom is pressed against the mounting hole of the sliding seat 604 through the support tube 606 , thereby ensuring its stability and positioning in the sliding seat 604 .

[0055] The end of the alloy impact head 602 is an arc-shaped ball head. This design can not only better adapt to the curvature of the inner wall of the workpiece, but also reduce the damage to the inner wall of the workpiece and improve the accuracy and effect of hammering.

[0056] 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. A reciprocating hammer strengthening device for inner hole surface, characterized in that: The invention comprises a housing assembly and a transmission rod assembly, wherein the housing assembly comprises a transition tube (3) and an outer tube (2) which are connected in sequence, a hammer sleeve (4) being fixedly provided at the end of the transition tube (3), a sliding hammer core shaft (5) being provided in the hammer sleeve (4), a bottom tube (1) being fixedly provided at the end of the outer tube (2), and a pneumatic linear vibrator (17) being provided in the bottom tube (1); 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 fixing ring (12) is fixedly provided in the outer tube (2), the connecting rod (13) is slidably located in the fixing ring (12), a spring (14) is sleeved on the outer side of the connecting rod (13), one end of the spring (14) abuts against the fixing ring (12), and the other end abuts against a boss on the outer side of the connecting rod (13), a pneumatic linear vibrator (17) is coaxially arranged with the transmission rod assembly, and the pneumatic linear vibrator (17) acts on the end of the connecting rod (13) by pushing. A plurality of sliding hammer heads (6) are arranged on the outer side of the hammer core shaft (5), and the hammer heads (6) are located at the ends of the housing components and move radially.

2. According to claim 1, a reciprocating hammer strengthening device for inner hole surface, characterized in that: The transition pipe (3) is connected to the hammer sleeve (4) via a rectangular thread, a ball sleeve (8) is provided between the hammer sleeve (4) and the hammer core shaft (5), and the hammer core shaft (5) slides against the hammer sleeve (4) via the ball sleeve (8).

3. The inner hole surface reciprocating hammer strengthening device according to claim 1, characterized in that: An end cover (7) is fixedly provided at the end of the hammer sleeve (4), and a plurality of openings corresponding to the end cover (7) and the hammer sleeve (4) are provided, the openings are spliced ​​to form a slot (18), and the hammer head (6) is located in the slot (18) and moves.

4. The inner hole surface reciprocating hammer strengthening device according to claim 1, characterized in that: The outer tube (2) and the transition tube (3) are connected via rectangular threads; a plurality of linear bearing supports (11) are provided between the outer tube (2) and the extension rod (10); the extension rod (10) slides against the inner side of the outer tube (2) via the linear bearing supports (11).

5. The inner hole surface reciprocating hammer strengthening device according to claim 1, characterized in that: A first pressing block (15) and a second pressing block (16) are provided on the side of the connecting rod (13) opposite to the pneumatic linear vibrator (17), and the pneumatic linear vibrator (17) drives the second pressing block (16) to push on the first pressing block (15).

6. The inner hole surface reciprocating hammer strengthening device according to claim 1, characterized in that: A plurality of inclined surfaces (501) are provided on the outer side of the end of the hammer core shaft (5), a dovetail groove (502) is provided in the middle of the inclined surface (501), a dovetail block (605) is fixedly provided on the inclined surface 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 surface reciprocating hammer strengthening device according to claim 1, characterized in that: A pressure cover (601) is fixedly arranged on the sliding seat (604) in the hammer head (6), and a plurality of protruding alloy impact heads (602) are arranged between the pressure cover (601) and the sliding seat (604).

8. The inner hole surface reciprocating hammer strengthening device according to claim 7, characterized in that: A plurality of alloy impact heads (602) are arranged in an array, with each row arranged in a staggered manner, and each row of alloy impact heads (602) is arc-shaped on a projection surface to match the arc of an inner hole of a workpiece.

9. The inner hole surface reciprocating hammer strengthening device according to claim 7, characterized in that: The sliding seat (604) is provided with a plurality of mounting holes, the bottom of the alloy impact head (602) is pressed against the mounting holes via a support tube (606), the alloy impact head (602) is T-shaped, and both ends of the pressure cover (601) are fixedly connected to the sliding seat (604) via bolts, and the pressure cover (601) is used to press and fix the alloy impact head (602) on the sliding seat (604).

10. The inner hole surface reciprocating hammer strengthening device according to any one of claims 7 to 9, characterized in that: The end of the alloy impact head (602) is an arc-shaped ball head.

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