Hammering strengthening device for inner hole surface treatment

Abstract

The utility model provides a hammering strengthening device for inner hole surface treatment, which comprises a shell assembly and a transmission rod assembly, the shell assembly comprises a transition pipe and an outer pipe which are sequentially connected, a hammering sleeve is fixedly arranged at the end part of the transition pipe, a sliding hammer core shaft is arranged in the hammering sleeve, a bottom pipe is fixedly arranged at the end part of the outer pipe, and a pneumatic linear vibrator is arranged in the bottom pipe; a plurality of sliding hammering heads are arranged on the outer side of the hammer core shaft and located at the end of the shell assembly to move in the radial direction. According to the inner hole surface reciprocating hammering strengthening device, the stability and precision of the inner hole surface reciprocating hammering strengthening device in high-frequency reciprocating motion are ensured through the elaborately-designed connecting mode, the supporting structure, the power transmission mechanism and the hammering head structure. Due to the design, the reliability of the device is improved, the service life of the device is prolonged, and the device is outstanding in various industrial applications.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of surface treatment, in particular to hammering reinforcement device for inner hole surface treatment. BACKGROUND

[0002] Inner hole inner wall reinforcement is an important process to improve the inner wall surface hardness, fatigue strength and corrosion resistance of workpieces, and is widely used in aerospace, automobile manufacturing, machining and other fields. The commonly used inner hole inner wall reinforcement methods at present include rolling reinforcement, shot peening, laser shock reinforcement, ultrasonic impact reinforcement, carburizing and nitriding, induction quenching, electroplating and spraying, etc. However, the common problem in practical application of these methods is low processing efficiency. Especially in processing workpieces with complex shape and long inner hole, the existing reinforcement methods often need a lot of time and manpower, which is difficult to meet the demand of modern manufacturing industry for efficient and automated production. SUMMARY

[0003] The main purpose of the utility model is to provide hammering reinforcement device for inner hole surface treatment, which solves the problems in the above background technology.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of: including shell assembly and transmission rod assembly, the shell assembly includes transition pipe and outer pipe connected in sequence, the transition pipe end is fixedly provided with hammering sleeve, the hammering sleeve is provided with sliding hammer core shaft, the outer pipe end is fixedly provided with bottom pipe, the bottom pipe is provided with pneumatic linear vibrator;

[0005] The transmission rod assembly includes transmission rod, lengthening rod and connecting rod connected in sequence, the transmission rod end is fixedly connected with the hammer core shaft, the outer pipe is fixedly provided with fixing ring, the connecting rod slides in the fixing ring, the connecting rod outer side is provided with spring, one end of the spring abuts against the fixing ring, the other end abuts against the convex on the connecting rod outer side, the pneumatic linear vibrator is coaxially arranged with the transmission rod assembly, and the pneumatic linear vibrator pushes the connecting rod end;

[0006] The outer side of the hammer core shaft is provided with a plurality of sliding hammering heads, and the hammering heads move radially at the end of the shell assembly.

[0007] Preferably, the transition pipe and the hammering sleeve are connected through rectangular threads, a ball bushing is arranged between the hammering sleeve and the hammer core shaft, and the hammer core shaft slides in the hammering sleeve through the ball bushing.

[0008] Preferably, an end cover is fixedly arranged at the end of the hammering sleeve, a plurality of openings corresponding to the end cover are arranged on the hammering sleeve, the openings are spliced to form a clamping groove, and the hammering heads move in the clamping groove.

[0009] Preferably, the outer pipe and the transition pipe are connected through rectangular threads, a plurality of linear bearing supports are arranged between the outer pipe and the lengthening rod, and the lengthening rod slides in the outer pipe through the linear bearing support.

[0010] Preferably, the side opposite to the pneumatic linear vibrator of the connecting rod is provided with a first pressing block and a second pressing block, and the pneumatic linear vibrator drives the second pressing block to push on the first pressing block.

[0011] Preferably, the outer side of the hammer core shaft end is provided with multiple inclined surfaces, the middle of the inclined surfaces is provided with a dovetail groove, the bottom inclined surface of the hammer head is fixedly provided with a dovetail block, and the dovetail block slides in the dovetail groove.

[0012] Preferably, the sliding seat in the hammer head is fixedly provided with a gland, and multiple protruding alloy impact heads are arranged between the gland and the sliding seat.

[0013] Preferably, the multiple alloy impact heads are arranged in arrays, the arrays are staggered, and the alloy impact heads in each array are arc-shaped on a projection plane, so as to match the inner hole curvature of the workpiece.

[0014] Preferably, the sliding seat is provided with multiple mounting holes, the bottom of the alloy impact head abuts against the mounting hole through a supporting cylinder, the alloy impact head is T-shaped, the two ends of the gland are fixedly connected with the sliding seat through bolts, and the gland is used to press and fix the alloy impact head on the sliding seat.

[0015] Preferably, the end of the alloy impact head is an arc-shaped ball head.

[0016] The hammering reinforcing device for inner hole surface treatment has the beneficial effects that:

[0017] 1. The outer pipe and the transition pipe are connected through rectangular threads to provide stable connection and good sealing performance, and ensure the stability of the device in high-frequency reciprocating motion. Multiple linear bearing supports are arranged between the outer pipe and the lengthening rod to reduce friction, provide high-precision guidance, ensure that the lengthening rod remains linear during the movement process, and avoid deviation and shaking.

[0018] 2. The side opposite to the pneumatic linear vibrator of the connecting rod is provided with a first pressing block and a second pressing block to ensure the efficiency and stability of power transmission. This design can also absorb part of the impact force, reduce the influence of mechanical impact on the device, and prolong the service life of the device.

[0019] 3. The outer side of the hammer core shaft end is provided with multiple inclined surfaces, the middle of the inclined surfaces is provided with a dovetail groove, the bottom inclined surface of the hammer head is fixedly provided with a dovetail block, and the dovetail block slides in the dovetail groove. This design ensures that the radial movement path of the hammer head is accurately controllable, avoids unnecessary lateral deviation, and improves the precision and consistency of hammering.

[0020] 4. The multiple alloy impact heads are arranged in arrays, the arrays are staggered, and the alloy impact heads in each array are arc-shaped on a projection plane to match the inner hole curvature of the workpiece. This design ensures the uniform distribution of the hammer head on the inner wall of the workpiece, improves the coverage rate and uniformity of hammering.

[0021] 5、The end of the alloy impact head is an arc-shaped ball head, which can better adapt to the curvature of the inner wall of the workpiece and reduce damage to the inner wall of the workpiece, thereby improving the precision and effect of hammering.

[0022] 6、The design of the linear bearing support and the 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 elasticity to absorb part of the impact force, reduce the impact of mechanical impact on the device, and prolong the service life of the device.

[0023] 8、The cooperation of the pneumatic linear vibrator and the transmission rod assembly, and the design of the inclined surface and the dovetail groove ensure that the hammering head can efficiently and accurately hammer the inner wall of the workpiece, thereby improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model will be further described in connection with the drawings and embodiments:

[0025] Figure 1 is the overall structure of the utility model right section view;

[0026] Figure 2 is the utility model hammer shaft shaft side view;

[0027] Figure 3 is the utility model hammering sleeve and end cover connection right section view;

[0028] Figure 4 is the utility model hammer head plan view;

[0029] Figure 5 is the utility model Figure 4 A-A section view;

[0030] Figure 6 is the utility model Figure 4 B-B section view;

[0031] In the drawing: bottom pipe 1;Outer tube 2;Transition pipe 3;Hammering sleeve 4;Hammer core shaft 5;Inclined surface 501;Dovetail groove 502;Hammering head 6;Pressing cover 601;Alloy impact head 602;Locking bolt 603;Sliding seat 604;Dovetail block 605;Support cylinder 606;End cover 7;Ball bearing 8;Transmission rod 9;Extension rod 10;Linear bearing support 11;Fixed ring 12;Connecting rod 13;Spring 14;First pressing block 15;Second pressing block 16;Pneumatic linear vibrator 17;Clamping groove 18. DETAILED DESCRIPTION

[0032] As Figures 1-6As shown, the hammering reinforcement device for inner hole surface treatment 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 hammering sleeve 4 is fixedly arranged at the end of the transition pipe 3, a hammer core shaft 5 is slidably arranged in the hammering sleeve 4, and a bottom pipe 1 is fixedly arranged at the end of the outer pipe 2, and a pneumatic linear vibrator 17 is arranged in the bottom pipe 1;

[0033] The transmission rod assembly comprises a transmission rod 9, an extension rod 10 and a connecting rod 13 connected in sequence, the transmission rod 9 is fixedly connected with the hammer core shaft 5 at the end, a fixed ring 12 is fixedly arranged in the outer pipe 2, the connecting rod 13 is slidably arranged in the fixed ring 12, a spring 14 is sleeved outside the connecting rod 13, one end of the spring 14 is abutted against the fixed ring 12, and the other end is abutted against a boss outside the connecting rod 13, the pneumatic linear vibrator 17 is coaxially arranged with the transmission rod assembly, and the pneumatic linear vibrator 17 pushes the end of the connecting rod 13.

[0034] A plurality of sliding hammering heads 6 are arranged outside the hammer core shaft 5, and the hammering heads 6 are radially movable at the end of the shell assembly.

[0035] The pneumatic linear vibrator 17 is used for pushing the transmission rod assembly to move, so as to drive the hammer core shaft 5 to move, and then the hammering heads 6 are radially moved, the spring 14 is compressed and rebounded to drive the transmission rod assembly to reset, so that the hammering heads 6 can reciprocate to hammer the inner wall of the workpiece.

[0036] The pneumatic linear vibrator is used as a power source, the pneumatic linear vibrator 17 is installed in the bottom pipe 1, linear motion is generated through gas pressure, and the connecting rod 13 is pushed to move forward. The transmission rod assembly is composed of the transmission rod 9, the extension rod 10 and the connecting rod 13, wherein one end of the transmission rod 9 is fixedly connected with the hammer core shaft 5. When the pneumatic linear vibrator 17 acts, it will transmit force to the entire transmission rod assembly through the connecting rod 13, causing the hammer core shaft 5 to move accordingly.

[0037] The spring 14 is installed outside the connecting rod 13, one end of the spring 14 is abutted against the fixed ring 12, and the other end is abutted against the boss on the connecting rod 13. When the pneumatic linear vibrator 17 stops acting or reversely moves, the restoring force of the spring 14 will reset the transmission rod assembly, ensuring the reciprocating movement in the hammering process.

[0038] The hammering heads 6 are installed outside the hammer core shaft 5 and can move radially along the hammer core shaft 5. With the reciprocating movement of the hammer core shaft 5, the hammering heads 6 will also correspondingly hammer the inner wall of the workpiece, achieving the reinforcement effect.

[0039] Preferably, the transition pipe 3 and the hammering sleeve 4 are connected through rectangular threads, a ball bushing 8 is arranged between the hammering sleeve 4 and the hammer core shaft 5, and the hammer core shaft 5 slides in the hammering sleeve 4 through the ball bushing 8.

[0040] The transition pipe 3 is connected with the hammer sleeve 4 by rectangular threads, which provides strong tensile strength and good sealing performance. Rectangular threads have larger contact area than ordinary threads, can bear higher load, and help to improve the overall rigidity and stability of the device.

[0041] A ball bushing 8 is provided between the hammer shaft 5 and the hammer sleeve 4, which helps to reduce friction between the two and enables the hammer shaft 5 to slide more smoothly within the hammer sleeve 4. The design of the ball bushing can significantly reduce wear, prolong the service life of the device, and ensure high precision and efficiency in long-term high-frequency reciprocating motion.

[0042] Preferably, the end cap 7 is fixed at the end of the hammer sleeve 4, and the end cap 7 is provided with a plurality of openings corresponding to the hammer sleeve 4, which are spliced to form a clamping groove 18, and the hammer head 6 is located in the clamping groove 18 and moves.

[0043] The hammer head 6 can convert the axial movement of the hammer shaft 5 into radial movement of the hammer head 6 through the restriction of the clamping groove 18.

[0044] 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 shaft 5 also moves forward. Since the hammer head 6 is located in the clamping groove 18, the geometry of the clamping groove 18 forces the hammer head 6 to move radially while the hammer shaft 5 moves axially.

[0045] When the hammer 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.

[0046] When the pneumatic linear vibrator 17 stops pushing or reverses, the restoring force of the spring 14 resets the transmission rod assembly, and the hammer shaft 5 moves backward. At this time, the hammer head 6 moves radially under the guidance of the clamping groove 18 and returns to the initial position.

[0047] Preferably, the outer pipe 2 is connected with the transition pipe 3 by rectangular threads, and a plurality of linear bearing supports 11 are provided between the outer pipe 2 and the extension rod 10, and the extension rod 10 slides against the outer pipe 2 through the linear bearing supports 11.

[0048] The outer pipe 2 is connected with the transition pipe 3 by rectangular threads. Rectangular threads have larger contact area and higher load capacity, which can provide stable connection and good sealing performance. This connection method not only can bear larger axial load, but also can effectively prevent loosening, and ensure the stability of the device in high-frequency reciprocating motion.

[0049] 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 smooth and smooth sliding of the extension rod 10 in reciprocating motion. The linear bearing supports 11 can provide high-precision guidance, ensuring that the extension rod 10 remains linear during movement, 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, reducing maintenance frequency and cost.

[0050] Preferably, the side opposite to the connecting rod 13 and the pneumatic linear vibrator 17 is provided with a first pressing block 15 and a second pressing block 16, and the pneumatic linear vibrator 17 drives the second pressing block 16 to push on the first pressing block 15.

[0051] The thrust generated by the pneumatic linear vibrator 17 is transmitted to the first pressing block 15 through the second pressing block 16, and then transmitted to the connecting rod 13 through the first pressing block 15. This design ensures the efficiency and stability of power transmission. The contact surface between the first pressing block 15 and the second pressing block 16 can be designed to have a certain elasticity to absorb part of the impact force, reduce the impact of mechanical impact on the device, and prolong the service life of the device. By adjusting the position of the first pressing block 15 and the second pressing 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.

[0052] Preferably, the outer side of the end of the hammer core shaft 5 is provided with a plurality of inclined surfaces 501, the middle of the inclined surface 501 is provided with a dovetail groove 502, and the bottom inclined surface of the hammer head 6 is fixedly provided with a dovetail block 605, which slides in the dovetail groove 502.

[0053] The hammer core shaft 5 is connected with the hammer head 6 through the inclined surface and the dovetail structure, so as to convert the linear movement of the hammer core shaft 5 into the radial movement of the hammer head 6.

[0054] The outer side of the end of the hammer core shaft 5 is provided with a plurality of inclined surfaces 501. The design of these inclined surfaces is to convert the axial movement of the hammer core shaft 5 into the radial movement of the hammer head 6. The middle of each inclined surface 501 is provided with a dovetail groove 502. The design of the dovetail groove 502 not only provides accurate guidance, but also ensures that the hammer head 6 will not fall off during movement. The bottom inclined surface of the hammer head 6 is fixedly provided with a dovetail block 605, which slides in the dovetail groove 502. The cooperation of the dovetail block 605 and the dovetail groove 502 ensures the stable sliding of the hammer head 6 on the inclined surface 501.

[0055] 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 hammer core shaft 5 moves forward, the inclined surface 501 converts the axial movement into the radial movement of the hammer head 6 through the cooperation of the dovetail block 605 and the dovetail groove 502.

[0056] The hammer head 6 moves radially under the restriction of the clamping groove 18, contacts the inner wall of the workpiece, and performs hammering. When the pneumatic linear vibrator 17 stops pushing or reverses, 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 groove 502, and returns to the initial position.

[0057] Preferably, the sliding seat 604 in the hammer head 6 is fixed with a gland 601, and a plurality of protruding alloy impact heads 602 are arranged between the sliding seat 604 and the gland 601.

[0058] The plurality of alloy impact heads 602 are arranged in an array, each column is staggered, and the alloy impact heads 602 in each column are arc-shaped on the projection plane to match the inner hole curvature of the workpiece.

[0059] The sliding seat 604 is provided with a plurality of mounting holes, the bottom of the alloy impact head 602 abuts against the mounting hole through the support cylinder 606, the alloy impact head 602 is T-shaped, and the two ends of the gland 601 are fixedly connected with the sliding seat 604 through bolts, and the gland 601 is used to press and fix the alloy impact head 602 on the sliding seat 604.

[0060] The end of the alloy impact head 602 is an arc-shaped ball head.

[0061] The sliding seat 604 is the main support structure of the hammer head 6, and is provided with a plurality of mounting holes for fixing the alloy impact head 602. The gland 601 is fixed on the sliding seat 604 and connected through bolts, and is used to press and fix the alloy impact head 602 on the sliding seat 604.

[0062] The plurality of alloy impact heads 602 are arranged in an array on the sliding seat 604, each column is staggered, and the alloy impact heads 602 in each column are arc-shaped on the projection plane to match the inner hole curvature of the workpiece. The alloy impact head 602 is T-shaped, and the bottom abuts against the mounting hole of the sliding seat 604 through the support cylinder 606.

[0063] The support cylinder 606 is used to support the alloy impact head 602 and ensure the stability and positioning of the alloy impact head 602 in the sliding seat 604. The length of the support cylinder 606 is adjusted, so that the protruding height of the corresponding alloy impact head 602 can be adjusted.

[0064] The plurality of alloy impact heads 602 are arranged in arrays, and each array is staggered, thereby ensuring uniform distribution of the hammering heads 602 on the inner wall of the workpiece and improving the coverage and uniformity of hammering.

[0065] The alloy impact heads 602 of each array are arc-shaped on the projection surface to match the curvature of the inner hole of the workpiece, thereby ensuring the fit of the hammering heads 602 with the inner wall of the workpiece and improving the hammering effect.

[0066] The alloy impact head 602 is T-shaped, and the bottom is abutted against the mounting hole of the sliding seat 604 through the support cylinder 606, thereby ensuring the stability and positioning of the alloy impact head 602 in the sliding seat 604.

[0067] The end of the alloy impact head 602 is arc-shaped and is provided with a ball head, which not only can better adapt to the curvature of the inner wall of the workpiece, but also can reduce the damage to the inner wall of the workpiece and improve the precision and effect of hammering.

[0068] The above-described embodiments are only preferred technical solutions of the present application, and should not be regarded as limiting the present application, and the protection scope of the present application should be the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features recited in the claims as the protection scope. That is, the equivalent replacement improvements within the scope are also within the protection scope of the present application.

Claims

1. A hammering reinforcement device for the surface treatment of internal holes, characterized in that: The utility model relates to a kind of pneumatic hammer, including shell assembly and transmission rod assembly, shell assembly includes transition pipe (3) and outer tube (2) connected in sequence, transition pipe (3) end is fixed with hammer sleeve (4), sliding hammer shaft (5) is equipped in hammer sleeve (4), outer tube (2) end is fixed with bottom pipe (1), pneumatic linear vibrator (17) is equipped in bottom pipe (1); Transmission rod assembly includes transmission rod (9), lengthening rod (10) and connecting rod (13) connected in sequence, transmission rod (9) end is fixedly connected with hammer shaft (5), fixed ring (12) is fixed in outer tube (2), connecting rod (13) is located in fixed ring (12) and slides, spring (14) is sleeved on the outside of connecting rod (13), one end of spring (14) is abutted on fixed ring (12), the other end is abutted on the boss outside connecting rod (13), pneumatic linear vibrator (17) is coaxially arranged with transmission rod assembly, pneumatic linear vibrator (17) is pushed on the end of connecting rod (13); Hammer shaft (5) outside is equipped with multiple sliding hammer heads (6), hammer head (6) is located in the end of shell assembly and moves radially; Hammer sleeve (4) end is fixed with end cover (7), end cover (7) is equipped with multiple corresponding openings on hammer sleeve (4), opening is spliced to form clamping groove (18), hammer head (6) is located in clamping groove (18) and moves.

2. The hammering reinforcement device for internal hole surface treatment according to claim 1, wherein: Transition pipe (3) is connected with hammer sleeve (4) by rectangular thread, ball bushing (8) is equipped between hammer sleeve (4) and hammer shaft (5), hammer shaft (5) is slid in hammer sleeve (4) by ball bushing (8).

3. The hammering reinforcement device for internal surface treatment according to claim 1, wherein: Outer tube (2) is connected with transition pipe (3) by rectangular thread, multiple linear bearing supports (11) are equipped between outer tube (2) and lengthening rod (10), lengthening rod (10) is slid in outer tube (2) by linear bearing support (11).

4. The hammering reinforcement device for internal surface treatment according to claim 1, wherein: The side opposite to connecting rod (13) and pneumatic linear vibrator (17) is equipped with first pressing block (15) and second pressing block (16), pneumatic linear vibrator (17) drives second pressing block (16) and pushes on first pressing block (15).

5. The hammering reinforcement device for internal surface treatment according to claim 1, wherein: Hammer shaft (5) end outside is equipped with multiple bevels (501), middle part of bevel (501) is equipped with dovetail groove (502), hammer head (6) bottom bevel is fixed with dovetail block (605), dovetail block (605) is slid in dovetail groove (502).

6. The hammering reinforcement device for internal surface treatment according to claim 1, wherein: Hammer head (6) is fixed with gland (601) on sliding seat (604), multiple protruding alloy impact heads (602) are equipped between gland (601) and sliding seat (604).

7. The hammering reinforcement device for internal hole surface treatment according to claim 6, characterized in that: Multiple alloy impact heads (602) are arranged in array, each column is staggered, and each column of alloy impact heads (602) is arc-shaped on projection plane, to match the inner hole radian of workpiece.

8. The hammering reinforcement device for internal surface treatment according to claim 6, wherein: Multiple mounting holes are equipped on sliding seat (604), alloy impact head (602) bottom is abutted in mounting hole through support cylinder (606), alloy impact head (602) is T-shaped, both ends of gland (601) are fixedly connected with sliding seat (604) through bolt, and gland (601) is used to compress and fix alloy impact head (602) on sliding seat (604).

9. The hammering reinforcement device for internal hole surface treatment according to any one of claims 6 to 8, characterized in that: The alloy impact head (602) is arc-shaped at the end.

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