Tapping extender

Abstract

The present invention belongs to the field of tapping, specifically a tapping extender, including a knife barrel, an extension rod one, an extension rod two and a tapping tool. The bottom of the knife barrel is installed with an extension rod one, the bottom of the extension rod one is provided with an extension rod two, and the interior of the extension rod one is provided with an extension assembly. The present invention abandons the traditional mode of being equipped with multiple extension rods of different lengths. Through a unique adjustable structure, when encountering tapping holes of different depths, the length can be adjusted without disassembling the existing extension rods. It effectively reduces the equipment purchase cost, avoids the time loss caused by replacing the extension rod, and greatly improves the processing progress and production efficiency. The staggered plug-in design of the serrations on the end faces of the side pressure plate and the barrier plate can be used to accurately fix the built-in rod. Under normal working conditions, the extension rod structure is ensured to be stable, providing reliable support for the tapping operation, and ensuring the stability and processing accuracy of the processing process.

Description

Technical Field

[0001] The invention belongs to the field of tapping, in particular to a tapping extender. Background Art

[0002] In the field of machining, tapping is a key process in manufacturing components with internally threaded holes. As modern industrial product structures become increasingly complex and component design spaces become increasingly compact, the demand for deep-hole tapping is increasing. During deep-hole tapping, an extension rod is required to increase the working length of the tapping tool to allow for deep penetration into the workpiece.

[0003] Traditional tapping extension rods are usually designed with fixed lengths. Operators need to prepare extension rods of various specifications and lengths in advance for tapping holes of different depths. This approach has many disadvantages:

[0004] On the one hand, companies need to stock a large number of extension rods of different lengths, which increases equipment procurement costs and increases the difficulty of warehouse management;

[0005] On the other hand, when replacing the extension rod, the machine needs to be stopped for disassembly, reinstallation and debugging, which not only consumes a lot of time, but also easily affects the processing accuracy due to installation errors, seriously restricting production efficiency.

[0006] Furthermore, the stability of feed rate and pressure during tapping operations plays a decisive role in tapping quality. A sudden change in feed rate during tapping, resulting in an instantaneous increase in pressure, can easily cause deformation of the tapped hole, substandard thread quality, or even cause the tapping tool to collide with the workpiece, resulting in tool damage and workpiece failure. In more serious cases, it can damage the equipment spindle, resulting in significant economic losses.

[0007] To this end, the present invention provides a tapping extender. Summary of the Invention

[0008] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0009] The technical solution adopted by the present invention to solve its technical problems is: the tapping extender described in the present invention includes a knife barrel, an extension rod 1, an extension rod 2 and a tapping tool, the extension rod 1 is installed at the bottom of the knife barrel, the extension rod 2 is provided at the bottom of the extension rod 1, an extension component is provided inside the extension rod 1, a tool fixing head is installed at the bottom of the extension rod 2, and a tapping tool is installed at the bottom of the tool fixing head.

[0010] Preferably, the extension assembly includes a built-in cavity opened inside the extension rod 1, a built-in rod is arranged inside the built-in cavity, the bottom of the built-in rod is fixedly connected to the top of the extension rod 2, a reset cavity is opened at the top of the built-in cavity, and a spring 1 is arranged inside the reset cavity.

[0011] Preferably, the top of spring one is fixedly connected to the inner top wall of the reset cavity, and the bottom of spring one is fixedly connected to the top of the built-in rod.

[0012] Preferably, the size of the built-in cavity matches the size of the built-in rod, and the built-in rod can slide up and down in the built-in cavity.

[0013] Preferably, blocking plates are fixed on both side walls of the built-in rod, side grooves are opened on both side walls inside the built-in cavity, side pressure plates are arranged inside the side grooves, a pushing block is fixed at the middle position of the back of the side pressure plate, and spring 2 is fixed at the upper and lower ends of the back of the side pressure plate, and one end of spring 2 is fixedly connected to the inner wall of the side groove.

[0014] Preferably, the end portion of the side pressure plate facing the blocking plate is designed to be serrated, and the end surface of the blocking plate facing the side pressure plate is designed to be serrated.

[0015] Preferably, the outer part of the extension rod 1 is provided with a pressing cylinder, the inner side wall of the pressing cylinder presses the side wall of the pushing block tightly, the top of the pressing cylinder is provided with a support block 1, the support block 1 is fixed to the outside of the extension rod 1, the bottom of the support block 1 is fixed with a spring 3, the bottom of the spring 3 is fixedly connected to the top of the pressing cylinder, the spring 3 is wrapped around the outside of the extension rod 1, the bottom of the pressing cylinder is provided with a support block 2, the support block 2 is fixed to the outside of the extension rod 1, the bottom of the support block 2 is installed with a push-back telescopic rod, the output end of the top of the push-back telescopic rod protrudes from the top of the support block 2 and is fixed with a resist block, the top of the resist block is in close contact with the bottom of the pressing cylinder, and a pressure sensor is embedded in the top of the tapping tool.

[0016] Preferably, guide grooves are provided at both ends of the interior of the built-in cavity, and guide blocks are provided inside the guide grooves, and the guide blocks are fixed to both ends of the built-in rod.

[0017] Preferably, the size of the guide block matches the size of the guide groove, and the guide block can slide inside the guide groove.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The tapping extender of this invention eliminates the traditional requirement for multiple extension rods of varying lengths. Its unique adjustable structure allows for length adjustment for tapping holes of varying depths without removing the existing extension rods. This effectively reduces equipment acquisition costs, avoids the time lost from replacing extension rods, and significantly improves processing progress and production efficiency.

[0020] 2. The tapping extender of this invention utilizes a staggered design with serrations on the end faces of the side pressure plates and the barrier plate to precisely secure the internal rod. Under normal operating conditions, the extended rod structure is stable, providing reliable support for the tapping operation and ensuring stability and precision during the machining process.

[0021] 3. The tapping extender of this invention incorporates an intelligent protection system consisting of an integrated pressure sensor and a single-chip microcomputer, capable of real-time monitoring of pressure changes within the tapping tool. Upon detecting a sudden change in pressure, it rapidly triggers the push-back telescopic rod and other components to work together, retracting the tapping tool and extension rod in a timely manner. This effectively prevents tool collision accidents, significantly protecting the workpiece, tapping tool, and equipment spindle, reducing equipment maintenance costs and production risks, and ensuring safe and efficient tapping operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is the overall structural diagram of the present invention;

[0024] Figure 2 It is a structural diagram of the tapping tool in the present invention;

[0025] Figure 3 This is a front view of the structure of the extension rod of the present invention;

[0026] Figure 4 It is a partial front view of the structure cross-section of the present invention;

[0027] Figure 5 This is a cross-sectional view of the local structure of the extension rod in the present invention Figure 1 ;

[0028] Figure 6 This is a cross-sectional view of the local structure of the extension rod in the present invention Figure 2 ;

[0029] Figure 7 The present invention Figure 6 A in the middle shows the enlarged structure diagram;

[0030] Figure 8 It is a partial structural diagram of the extension rod in the present invention.

[0031] In the figure: 1. knife cylinder; 2. extension rod 1; 21. reset chamber; 22. spring 1; 23. built-in chamber; 231. guide block; 232. guide groove; 24. built-in rod; 241. side groove; 242. side pressure plate; 243. push block; 244. spring 2; 245. blocking plate; 25. support block 1; 251. spring 3; 252. pressure cylinder; 253. support block 2; 254. push-back telescopic rod; 255. block; 3. extension rod 2; 4. tool fixing head; 5. tapping tool; 51. pressure sensor. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0033] like Figures 1 to 8 As shown, the tapping extender of an embodiment of the present invention includes a knife cylinder 1, an extension rod 2, an extension rod 3 and a tapping tool 5. The bottom of the knife cylinder 1 is installed with an extension rod 2, the bottom of the extension rod 2 is provided with an extension rod 3, the interior of the extension rod 2 is provided with an extension component, the bottom of the extension rod 2 3 is installed with a tool fixing head 4, and the bottom of the tool fixing head 4 is installed with a tapping tool 5.

[0034] The extension component includes a built-in cavity 23 opened inside the extension rod 2, a built-in rod 24 is arranged inside the built-in cavity 23, the bottom of the built-in rod 24 is fixedly connected to the top of the extension rod 3, a reset cavity 21 is opened at the top of the built-in cavity 23, and a spring 22 is arranged inside the reset cavity 21.

[0035] The top of the spring 1 22 is fixedly connected to the inner top wall of the reset cavity 21 , and the bottom of the spring 1 22 is fixedly connected to the top of the built-in rod 24 .

[0036] The size of the built-in cavity 23 matches the size of the built-in rod 24 , and the built-in rod 24 can slide up and down in the built-in cavity 23 .

[0037] Blocking plates 245 are fixed to the two side walls of the built-in rod 24, and side grooves 241 are opened on the two side walls inside the built-in cavity 23. Side pressure plates 242 are arranged inside the side grooves 241, and a pushing block 243 is fixed to the middle position of the back of the side pressure plate 242. Springs 244 are fixed to the upper and lower ends of the back of the side pressure plate 242, and one end of the spring 244 is fixedly connected to the inner wall of the side groove 241.

[0038] The end portion of the side pressure plate 242 facing the blocking plate 245 is designed to be serrated, and the end surface of the blocking plate 245 facing the side pressure plate 242 is designed to be serrated.

[0039] The outside of the extension rod 2 is provided with a pressure cylinder 252, and the inner side wall of the pressure cylinder 252 presses the side wall of the pushing block 243. The top of the pressure cylinder 252 is provided with a support block 25, which is fixed to the outside of the extension rod 2. The bottom of the support block 25 is fixed with a spring 3 251, and the bottom of the spring 3 251 is fixedly connected to the top of the pressure cylinder 252. The spring 3 251 is wrapped around the outside of the extension rod 2. The bottom of the pressure cylinder 252 is provided with a support block 253, which is fixed to the outside of the extension rod 2. The bottom of the support block 253 is installed with a push-back telescopic rod 254. The output end of the top of the push-back telescopic rod 254 protrudes from the top of the support block 253 and is fixed with a push block 255. The top of the push block 255 is in close contact with the bottom of the pressure cylinder 252, and the top of the tapping tool 5 is embedded with a pressure sensor 51.

[0040] Guide grooves 232 are formed at both ends of the inner cavity 23 . Guide blocks 231 are provided inside the guide grooves 232 . The guide blocks 231 are fixed to both ends of the inner rod 24 .

[0041] The size of the guide block 231 matches the size of the guide groove 232 , and the guide block 231 can slide inside the guide groove 232 .

[0042] Specifically, there are multiple push-back telescopic rods 254, which are evenly spaced at the bottom of the second support block 253. The number of the retaining blocks 255 is the same as that of the push-back telescopic rods 254, and the retaining blocks 255 are evenly spaced at the top of the second support block 253.

[0043] In the default state, the bottom of the pressing cylinder 252 is in close contact with the top of the block 255, forming a stable contact structure. When the pushing block 243 is squeezed by the pressing cylinder 252, this pressure causes the side pressure plate 242 to move, and the movement of the side pressure plate 242 pulls the second spring 244 to extend, causing the second spring 244 to be in a stretched energy storage state.

[0044] The extension rod is composed of extension rod 1 2 and extension rod 2 3. Its core function is to effectively extend the length of the tool. Through this design, it can ensure that the tapping tool 5 penetrates deep into the product to perform tapping operations, meeting the special requirements of tool length in complex machining scenarios.

[0045] Further,

[0046] In traditional tapping operations, different lengths of extension rods are usually required for tapping holes of different depths. This approach has obvious drawbacks. On the one hand, it is necessary to prepare multiple extension rods of different lengths, which undoubtedly significantly increases production costs. On the other hand, the process of replacing the extension rods is cumbersome and time-consuming, seriously affecting the overall processing progress and reducing production efficiency.

[0047] To effectively solve the above problem, the device can adjust the length of the extension rod. When the extension rod consisting of extension rod 1 2 and extension rod 2 3 is assembled on the cutter barrel 1, the length of the tapping tool 5 is extended. If a deeper tapping hole is encountered, the extension rod does not need to be removed, but can be directly extended to quickly adapt to the new processing requirements.

[0048] The specific adjustment process is as follows:

[0049] The end surface of the side pressure plate 242 is designed with a serration structure, and the end surface of the blocking plate 245 is also provided with serrations. The serrations on the end surface of the side pressure plate 242 can be inserted into the gaps between the serrations on the end surface of the blocking plate 245. By utilizing this staggered insertion feature between the serrations, the side pressure plate 242 can reliably fix the position of the internal rod 24, thereby ensuring the structural stability of the extension rod in normal working conditions.

[0050] like Figure 4 As shown, in the initial working state, the pushing cylinder 252 pushes the pushing block 243, so that the serrations of the side pressure plate 242 and the blocking plate 245 are staggered and tightly fitted together. At this time, the side pressure plate 242 pulls the spring 244 to be in an extended state.

[0051] When you need to adjust the length of the extension rod:

[0052] First, push the top pressure cylinder 252 upward. During the movement, the top pressure cylinder 252 will squeeze the spring three 251, causing it to gradually shrink and store elastic potential energy. When the top pressure cylinder 252 moves to a position away from the push block 243 and no longer exerts an extrusion effect on the push block 243, the spring two 244, due to its own elastic force, drives the side pressure plate 242 to move away from the blocking plate 245. At this time, the push block 243 will protrude from the side groove 241 to the outer wall of the extension rod one 2. At the same time, the built-in rod 24 loses the fixed constraint of the side pressure plate 242. The operator can pull down the extension rod two 3 to drive the built-in rod 24 to move downward from the built-in cavity 23, thereby increasing the length of the extension rod composed of the extension rod one 2 and the extension rod two 3. In the process of pulling down the extension rod two 3 to drive the built-in rod 24 to move downward, the built-in rod 24 will pull the spring one 22 to extend, and the spring one 22 will also store elastic potential energy.

[0053] Afterwards, after the length of the extension rod is extended to meet the actual processing requirements, the upward-pushing cylinder 252 is released. At this time, the elastic potential energy stored in the spring three 251 is released, and its elastic force pushes the pressure cylinder 252 to move downward. During the downward movement, the pressure cylinder 252 squeezes the pushing block 243, causing it to move into the side groove 241. The movement of the pushing block 243 will drive the side pressure plate 242 to move toward the blocking plate 245 until the serrations of the side pressure plate 242 and the blocking plate 245 are interlaced and tightly fitted together again, thereby re-fixing the position of the built-in rod 24, and thus completing the extension operation of the entire extension rod. It is worth noting that when the pressure cylinder 252 is moved downward by the elastic force of the spring three 251, once the bottom of the pressure cylinder 252 is in close contact with the top wall of the block 255, the pressure cylinder 252 stops moving, ensuring the accuracy and stability of the adjustment process.

[0054] Furthermore,

[0055] When tapping with the tapping tool 5, maintaining a stable feed rate and pressure is crucial to ensuring uniform internal threads and improving machining quality. If the feed rate is suddenly increased, the pressure will increase dramatically. This will not only damage the tapped hole but also cause a violent collision between the tapping tool 5 and the workpiece, further damaging the workpiece or the tapping tool 5. More seriously, the tool shank may strike the workpiece, causing serious damage to the equipment's spindle, resulting in significant repair costs and the risk of production delays.

[0056] In order to effectively avoid the occurrence of the above situation, the present device is equipped with a high-precision pressure sensor 51 on the top of the tapping tool 5. The pressure sensor 51 can detect the pressure changes that the tapping tool 5 is subjected to during feeding in real time and accurately. Once the pressure sensor 51 detects a sudden increase in pressure, it will quickly transmit the relevant information to the single-chip microcomputer. As the core control unit of the entire intelligent protection system, the single-chip microcomputer will immediately respond after receiving the abnormal pressure signal and control the push-back telescopic rod 254 to push the block 255 upward. Under the action of the push-back telescopic rod 254, the block 255 pushes the top-pressing cylinder 252 to move it upward.

[0057] When the push cylinder 252 moves away from the push block 243, spring 244 pulls the side pressure plate 242 away from the blocking plate 245, freeing the internal rod 24 from its fixed position. At this point, the elastic force of spring 1 22 at the top of the internal rod 24 pulls the internal rod 24 upward, driving the extension rod 2 3 upward, thereby retracting the extension rod 2 3 and the tapping tool 5. This series of rapid and precise response mechanisms effectively prevents tool collisions, provides reliable protection for the workpiece and tapping tool 5, and ensures safe and stable tapping operations.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A tapping extender, comprising a knife barrel (1), an extension rod 1 (2), an extension rod 2 (3) and a tapping tool (5), characterized in that: An extension rod 1 (2) is installed at the bottom of the knife barrel (1), an extension rod 2 (3) is provided at the bottom of the extension rod 1 (2), an extension component is provided inside the extension rod 1 (2), a tool fixing head (4) is installed at the bottom of the extension rod 2 (3), and a tapping tool (5) is installed at the bottom of the tool fixing head (4); The extension assembly includes a built-in cavity (23) provided inside the extension rod (2), a built-in rod (24) provided inside the built-in cavity (23), the bottom of the built-in rod (24) is fixedly connected to the top of the extension rod (3), a reset cavity (21) is provided at the top of the built-in cavity (23), and a spring (22) is provided inside the reset cavity (21); Blocking plates (245) are fixed to both side walls of the built-in rod (24), side grooves (241) are opened on both side walls inside the built-in cavity (23), a side pressure plate (242) is provided inside the side groove (241), a push block (243) is fixed to the middle position of the back of the side pressure plate (242), a second spring (244) is fixed to the upper and lower ends of the back of the side pressure plate (242), and one end of the second spring (244) is fixedly connected to the inner side wall of the side groove (241); The end of the side pressure plate (242) facing the blocking plate (245) is designed to be serrated, and the end surface of the blocking plate (245) facing the side pressure plate (242) is designed to be serrated; The outer sleeve of the extension rod 1 (2) is provided with a pressure cylinder (252), the inner side wall of the pressure cylinder (252) presses the side wall of the push block (243), the top of the pressure cylinder (252) is provided with a support block 1 (25), the support block 1 (25) is fixed to the outer side of the extension rod 1 (2), the bottom of the support block 1 (25) is fixed with a spring 3 (251), the bottom of the spring 3 (251) is fixedly connected to the top of the pressure cylinder (252), and the spring 3 (251) is wound around the outer side of the extension rod 1 (2). The bottom of the top-pressing cylinder (252) is provided with a supporting block 2 (253), which is fixed to the outside of the extension rod 1 (2), and the bottom of the supporting block 2 (253) is provided with a push-back telescopic rod (254), the output end of the top of the push-back telescopic rod (254) protrudes from the top of the supporting block 2 (253) and is fixed with a resisting block (255), the top of the resisting block (255) is in close contact with the bottom of the top-pressing cylinder (252), and the top of the tapping tool (5) is embedded with a pressure sensor (51); Guide grooves (232) are provided at both ends of the built-in cavity (23), and guide blocks (231) are provided inside the guide grooves (232). The guide blocks (231) are fixed to both ends of the built-in rod (24).

2. The tapping extender according to claim 1, characterized in that: The top of the spring one (22) is fixedly connected to the inner top wall of the reset cavity (21), and the bottom of the spring one (22) is fixedly connected to the top of the built-in rod (24).

3. The tapping extender according to claim 1, characterized in that: The size of the built-in cavity (23) matches the size of the built-in rod (24), and the built-in rod (24) can slide up and down in the built-in cavity (23).

4. The tapping extender according to claim 1, characterized in that: The size of the guide block (231) matches the size of the guide groove (232), and the guide block (231) can slide inside the guide groove (232).

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