Hammer head for hammering inner hole

Abstract

The utility model provides a hammer head for hammering an inner hole. The hammer head comprises a hammering sleeve, a hammer core shaft sliding in a reciprocating mode is arranged in the hammering sleeve, an end cover is fixedly arranged at the end of the hammering sleeve, a plurality of sliding hammering heads are arranged on the outer side of the hammer core shaft, and the hammering heads are located on the outer side of the hammering sleeve and move in the radial direction. A plurality of slopes are arranged on the outer side of the hammer core shaft, dovetail grooves are formed in the middles of the slopes, dovetail blocks are arranged on the slopes at the bottom of the hammering head, and the dovetail blocks abut against the interiors of the dovetail grooves to slide; openings corresponding to the hammering sleeve and the end cover are formed in the circumferential sides of the hammering sleeve and the end cover, the openings are spliced to form a clamping groove, and the hammering head slides in the clamping groove. According to the inner hole hammering tool, through optimal design, the working efficiency and the machining quality are improved, the overall performance and durability of equipment are enhanced, and meanwhile maintenance and management are facilitated. This makes it an efficient and reliable inner bore surface strengthening solution.

Description

Technical Field

[0001] This utility model relates to the field of internal surface treatment, specifically to a hammer head for hammering internal holes. Background Technology

[0002] Internal hole wall strengthening is an important process for improving the surface hardness, fatigue strength, and corrosion resistance of workpiece inner walls, and it is widely used in aerospace, automotive manufacturing, and machining. Currently, commonly used internal hole wall strengthening methods include rolling, shot peening, laser shock peening, ultrasonic shock peening, carburizing and nitriding, induction hardening, electroplating, and spraying. However, a common problem with these methods in practical applications is low processing efficiency. Especially when processing workpieces with complex shapes and long inner holes, existing strengthening methods often require a significant amount of time and manpower, making it difficult to meet the demands of modern manufacturing for efficient and automated production. Utility Model Content

[0003] The main purpose of this utility model is to provide a hammer head for internal hole hammering, thereby solving the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a hammer sleeve, a reciprocating sliding hammer core shaft is provided inside the hammer sleeve, an end cap is fixed at the end of the hammer sleeve, and a plurality of sliding hammer heads are provided on the outside of the hammer core shaft, and the hammer heads are located on the outside of the hammer sleeve and move radially.

[0005] The outer side of the hammer core shaft is provided with multiple inclined surfaces, and a dovetail groove is provided in the middle of the inclined surface. A dovetail block is provided on the inclined surface at the bottom of the hammer head, and the dovetail block slides against the dovetail groove.

[0006] The hammer sleeve and the end cap have corresponding openings on their periphery, and the openings are joined together to form a groove, in which the hammer head slides.

[0007] Preferably, the tail of the hammer sleeve is connected to the outer tube via a rectangular thread, and the outer tube is provided with a reciprocating sliding drive rod, which is coaxially arranged and fixedly connected to the hammer core shaft.

[0008] Preferably, a ball bearing sleeve is provided between the hammer sleeve and the hammer core shaft, and the hammer core shaft slides against the hammer sleeve through the ball bearing sleeve.

[0009] Preferably, a guide seat is fixedly provided in the middle of the end cap, and a sliding guide rod is provided inside the guide seat. The guide rod is arranged coaxially with the hammer core shaft, and the end of the guide rod is fixedly connected to the hammer core shaft.

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

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

[0012] Preferably, the sliding seat is provided with multiple mounting holes, and the bottom of the alloy impact head is abutted against the mounting hole by a support cylinder. The alloy impact head is T-shaped, and the two ends of the pressure cap are fixedly connected to the sliding seat by bolts. The pressure cap 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] This utility model provides a hammer head for internal hole hammering, with the following advantages:

[0015] 1. The guide rod within the guide seat precisely guides the hammer shaft, ensuring it maintains a straight path during reciprocating motion, thus improving the accuracy of the hammer head impacting the inner wall of the workpiece. The guide rod provides additional support points for the hammer shaft, reducing vibration and offset that may occur during high-speed reciprocating motion, making the entire device more stable and reliable. The application of ball bearing sleeves further reduces friction, ensuring smooth sliding of the hammer shaft within the hammer sleeve and enhancing the overall structural stability.

[0016] 2. The outer side of the hammer shaft end has multiple inclined surfaces, with dovetail grooves in the middle of the inclined surfaces. 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. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a front sectional view of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the hammer core shaft of this utility model;

[0020] Figure 3 This is a front sectional view of the connection between the hammer-driven sleeve and the end cap of the present invention;

[0021] Figure 4 This is a top view of the hammer head of the present invention;

[0022] Figure 5 This is the present invention. Figure 4 Sectional view of AA;

[0023] Figure 6 This is the present invention. Figure 4 BB section view;

[0024] In the diagram: outer tube 1; drive rod 2; ball bearing sleeve 3; hammer sleeve 4; hammer core shaft 5; inclined plane 501; dovetail groove 502; hammer head 6; pressure cap 601; alloy impact head 602; locking bolt 603; sliding seat 604; dovetail block 605; support cylinder 606; end cap 7; guide seat 701; guide rod 8; slot 9. Detailed Implementation

[0025] like Figures 1-6 As shown, the hammer head for internal hole hammering includes a hammering sleeve 4, a reciprocating sliding hammer core shaft 5 is provided inside the hammering sleeve 4, an end cap 7 is fixed at the end of the hammering sleeve 4, and a plurality of sliding hammer heads 6 are provided on the outside of the hammer core shaft 5. The hammer heads 6 are located on the outside of the hammering sleeve 4 and move radially.

[0026] The outer side of the hammer shaft 5 is provided with multiple inclined surfaces 501, and the middle of the inclined surface 501 is provided with a dovetail groove 502. The bottom of the hammer head 6 is provided with a dovetail block 605 on the inclined surface, and the dovetail block 605 slides against the dovetail groove 502.

[0027] The hammer sleeve 4 and the end cap 7 have corresponding openings on their sides, and the openings are spliced ​​together to form a groove 9, in which the hammer head 6 slides.

[0028] By driving the hammer shaft 5 to reciprocate, the multiple hammer heads 6 on the outside of the hammer shaft 5 are driven to reciprocate radially under the restriction of the slot 9, so that the hammer heads 6 can reciprocate and act on the inner wall of the workpiece for hammering and strengthening.

[0029] The outer side of the hammer shaft 5 is provided with inclined surfaces 501, and these inclined surfaces are also provided with dovetail grooves 502. Each hammer head 6 has a matching dovetail block 605 at its bottom, allowing the hammer head to move along the dovetail groove on the hammer shaft. When the hammer shaft is driven to reciprocate, the hammer head will be radially displaced due to the engagement between the dovetail groove and the dovetail block. The hammer sleeve 4 and the periphery of the end cover 7 together form a groove 9, which provides space for the radial movement of the hammer heads 6 while limiting their range of motion, ensuring that the hammer heads move along a predetermined path and accurately act on the inner wall of the workpiece. An external power source causes the hammer shaft to reciprocate rapidly, driving the hammer heads to reciprocate radially along the groove. In this way, the hammer heads can continuously impact the inner wall of the workpiece, achieving the effect of hammering strengthening.

[0030] Preferably, the tail of the hammer sleeve 4 is connected to the outer tube 1 via a rectangular thread, and the outer tube 1 is provided with a reciprocating sliding drive rod 2, which is coaxially arranged and fixedly connected to the hammer core shaft 5.

[0031] The tail of the hammer sleeve 4 is connected to the outer tube 1 via a rectangular thread. This connection method not only provides a secure fixation but also allows for a degree of adjustment to accommodate workpieces of different sizes or types.

[0032] A reciprocating sliding drive rod 2 is installed inside the outer tube 1. The drive rod 2 is coaxially arranged with and directly fixedly connected to the hammer core shaft 5. This means that the movement of the drive rod 2 will directly drive the hammer core shaft 5 to perform corresponding reciprocating motion.

[0033] An external power source drives the drive rod 2 to reciprocate rapidly along the axial direction. Since the drive rod 2 and the hammer shaft 5 are fixedly connected, the hammer shaft 5 also moves synchronously. The movement of the hammer shaft 5 converts the axial force into a radial force through the engagement between the inclined surface 501 and the dovetail groove 502 on its surface and the dovetail block 605 at the bottom of the hammer head 6, causing the hammer head 6 to reciprocate radially under the constraint of the slot 9. Ultimately, the hammer head 6 continuously impacts the inner wall of the workpiece, achieving hammering strengthening treatment of the inner surface of the workpiece.

[0034] Preferably, a ball bearing sleeve 3 is provided between the hammer sleeve 4 and the hammer shaft 5, and the hammer shaft 5 slides against the hammer sleeve 4 through the ball bearing sleeve 3.

[0035] The ball bearing bush utilizes rolling friction instead of sliding friction, significantly reducing the coefficient of friction, thereby minimizing energy loss and improving transmission efficiency. Because the ball bearing bush provides more stable support, the movement of the hammer shaft 5 is smoother and more accurate, helping to ensure that the hammer head 6 accurately acts on the inner wall of the workpiece along a predetermined path. Compared to wear caused by direct contact, using a ball bearing bush significantly reduces wear between the two, thus extending the overall service life of the equipment. If wear or other problems are found during use, replacing the ball bearing bush is relatively easy and does not require extensive disassembly of the entire tool.

[0036] Preferably, a guide seat 701 is fixedly provided in the middle of the end cover 7, and a sliding guide rod 8 is provided inside the guide seat 701. The guide rod 8 is arranged coaxially with the hammer core shaft 5, and the end of the guide rod 8 is fixedly connected to the hammer core shaft 5.

[0037] The hammer shaft 5 is guided by the guide rod 8 inside the guide seat 701, which can effectively prevent the hammer shaft from deviating from the center line during operation, and ensure that the hammer head 6 can accurately impact the inner wall of the workpiece along the predetermined path.

[0038] The guide rod 8 provides additional support points, helping to reduce vibrations that may occur during the high-speed reciprocating motion of the hammer shaft 5, making the entire device more stable and reliable. The stable guiding system reduces unnecessary wear, especially on the contact surfaces between the hammer shaft 5, the ball bearing sleeve 3, and the hammering sleeve 4, which helps extend the service life of these critical components.

[0039] Preferably, a pressure cap 601 is fixed on the sliding seat 604 in the hammer head 6, and a plurality of protruding alloy impact heads 602 are fixed between the pressure cap 601 and the sliding seat 604.

[0040] The alloy impact heads 602 are arranged in an array, with each column staggered. The alloy impact heads 602 in each column are arc-shaped on the projection plane to match the curvature of the inner hole of the workpiece.

[0041] The sliding seat 604 is provided with multiple mounting holes. The bottom of the alloy impact head 602 is abutted against the mounting hole by the support cylinder 606. The alloy impact head 602 is T-shaped. 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.

[0042] The end of the alloy impact head 602 is an arc-shaped ball head.

[0043] The sliding seat 604 is the main support structure of the hammer head 6, and it has multiple mounting holes for fixing the alloy impact head 602. The pressure cap 601 is fixed to the sliding seat 604 by bolts, and is used to press and fix the alloy impact head 602 to the sliding seat 604.

[0044] Multiple alloy impact heads 602 are arranged in an array on the sliding seat 604, with each column staggered. The alloy impact heads 602 in each column are arc-shaped on the projection plane to match the curvature of the inner hole of the workpiece. The alloy impact heads 602 are T-shaped, and their bottoms abut against the mounting holes of the sliding seat 604 via support cylinders 606.

[0045] The support cylinder 606 supports the alloy impact head 602, ensuring its stability and positioning within the sliding seat 604. Adjusting the length of the support cylinder 606 allows for adjustment of the protrusion height of the corresponding alloy impact head 602.

[0046] Multiple alloy impact heads 602 are arranged in an array with staggered columns, ensuring uniform distribution of the impact heads 602 on the inner wall of the workpiece and improving the coverage and uniformity of the impact.

[0047] Each column of alloy impact heads 602 is arc-shaped on the projection surface to match the curvature of the workpiece's inner hole, ensuring the fit between the hammer head 602 and the inner wall of the workpiece and improving the hammering effect.

[0048] The alloy impact head 602 is T-shaped, and its bottom rests against the mounting hole of the sliding seat 604 through the support cylinder 606, ensuring its stability and positioning within the sliding seat 604.

[0049] 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 damage to the inner wall of the workpiece and improve the accuracy and effect of hammering.

[0050] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A hammer head for internal drilling, characterized by: Includes a hammer sleeve (4), a reciprocating sliding hammer core shaft (5) is provided inside the hammer sleeve (4), an end cap (7) is fixed at the end of the hammer sleeve (4), and multiple sliding hammer heads (6) are provided on the outside of the hammer core shaft (5). The hammer heads (6) are located on the outside of the hammer sleeve (4) and move radially. The hammer shaft (5) has multiple inclined surfaces (501) on its outer side, and a dovetail groove (502) is provided in the middle of the inclined surface (501). A dovetail block (605) is provided on the inclined surface at the bottom of the hammer head (6). The dovetail block (605) slides against the dovetail groove (502). The hammer sleeve (4) and the end cap (7) are provided with corresponding openings on their periphery. The openings are spliced ​​together to form a groove (9), and the hammer head (6) slides in the groove (9).

2. The hammer head for internal hole hammering according to claim 1, characterized in that: The tail of the hammer sleeve (4) is connected to the outer tube (1) through a rectangular thread. The outer tube (1) is provided with a reciprocating sliding drive rod (2). The drive rod (2) is coaxially arranged and fixedly connected to the hammer core shaft (5).

3. The hammer head for internal hole hammering according to claim 1, characterized in that: A ball bearing sleeve (3) is provided between the hammer sleeve (4) and the hammer shaft (5), and the hammer shaft (5) slides against the hammer sleeve (4) through the ball bearing sleeve (3).

4. The hammer head for internal hole hammering according to claim 1, characterized in that: A guide seat (701) is fixedly provided in the middle of the end cap (7). A sliding guide rod (8) is provided inside the guide seat (701). The guide rod (8) is arranged coaxially with the hammer shaft (5). The end of the guide rod (8) is fixedly connected to the hammer shaft (5).

5. The hammer head for internal hole hammering according to claim 1, characterized in that: A pressure cap (601) is fixed on the sliding seat (604) in the hammer head (6), and a plurality of protruding alloy impact heads (602) are fixed between the pressure cap (601) and the sliding seat (604).

6. The hammer head for internal hole hammering according to claim 5, characterized in that: The alloy impact heads (602) are arranged in an array, with each column staggered. The alloy impact heads (602) in each column are arc-shaped on the projection plane to match the curvature of the inner hole of the workpiece.

7. The hammer head for internal hole hammering according to claim 5, characterized in that: The sliding seat (604) is provided with multiple mounting holes. The bottom of the alloy impact head (602) is abutted against the mounting hole by the support cylinder (606). The alloy impact head (602) is T-shaped. The two ends of the pressure cap (601) are fixedly connected to the sliding seat (604) by bolts. The pressure cap (601) is used to press and fix the alloy impact head (602) on the sliding seat (604).

8. The hammer head for internal hole hammering according to any one of claims 5 to 7, characterized in that: The end of the alloy impact head (602) is an arc-shaped ball head.

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