A tapping tool

Abstract

This utility model relates to the field of thread tapping tooling technology, specifically to a thread tapping tooling, including a taper shank and a tapping assembly. The taper shank has a connecting part, and the tapping assembly has a guide groove. The connecting part is embedded in the groove, driving the tapping assembly to rotate radially and allowing relative sliding in the axial direction to absorb part of the axial load. The tapping assembly includes a sliding sleeve and an assembly part. The sliding sleeve has a guide hole and a positioning platform. The assembly part can slide into and fix the tap. The mounting hole communicates with the guide hole. The end of the taper shank has a clearance hole to avoid the tail of the tap. The taper shank has a scale strip to facilitate observation of displacement changes through the guide groove, realizing quantitative control of the tapping depth. This utility model can effectively reduce the axial force transmitted to the tap, avoid tooth damage, and improve tapping stability and thread forming quality.

Description

Technical Field

[0001] This utility model relates to the field of thread tapping tooling technology, specifically to a thread tapping tooling. Background Technology

[0002] In the field of machining, tapping is a common process for machining internal threads on workpieces. The usual practice is to mount the tap on a machine tool, which then rotates the tap and feeds it axially to complete the thread machining. However, in actual machining, the tap is subjected to both rotational torque and significant axial pressure.

[0003] Excessive axial pressure can lead to uneven force on the tap, causing minor deformation, or resulting in slippage, skipped threads, and other defects, resulting in discontinuous cutting, asymmetrical thread profile, or localized missing threads. These problems are particularly prominent when machining high-strength materials or deep-hole threads, severely affecting the accuracy and reliability of threaded connections.

[0004] Therefore, how to effectively reduce the axial load on the tap while ensuring normal rotational transmission, and improve the stability of the tapping process and the quality of thread forming, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a thread tapping tool to solve the problem mentioned in the background art that excessive axial pressure on the tap can affect the quality of thread forming.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A thread tapping tool includes a taper shank and a tapping assembly. The taper shank is for connection to a machine tool and is configured to rotate and move axially under the drive of the machine tool. The taper shank has a connecting portion. The tapping assembly has a guide groove extending axially. The connecting portion is movably embedded in the guide groove, thereby allowing it to generate relative displacement axially within the guide groove and forming an abutment fit with the wall of the guide groove in the radial direction. When the taper shank rotates and moves axially, the abutment fit between the connecting portion and the wall of the guide groove drives the tapping assembly to rotate synchronously. At the same time, the connecting portion undergoes relative displacement axially within the guide groove, thereby absorbing part of the axial load and protecting the tapping assembly from or reducing the axial force.

[0007] Furthermore, the tapping assembly includes a sliding sleeve, the guide groove is formed on the sliding sleeve, the sliding sleeve has a guide hole inside, the axial direction of the guide hole is consistent with the axial direction of the guide groove; one end of the taper shank is slidably inserted into the guide hole and forms a sliding fit therewith.

[0008] Furthermore, the tapping assembly also includes an assembly part that is slidably inserted into the other end of the guide hole, and whose axis is collinear with the axis of the guide hole.

[0009] Furthermore, the assembly part is provided with an axially extending mounting hole, which is used to fix the tap and communicates with the guide hole, so that the tap can be inserted from one end of the mounting hole and extend axially into the guide hole.

[0010] Furthermore, a clearance hole is provided on one end of the taper shank that is inserted into the guide hole. The clearance hole is coaxially arranged with the mounting hole to avoid the tail of the tap.

[0011] Furthermore, a positioning platform is provided inside the sliding sleeve, the positioning platform is disposed inside the guide hole, and the assembly part can slide to abut against the positioning platform.

[0012] Furthermore, the guide groove avoids the positioning table in the axial direction, so that when the cone shank moves in the axial direction, the connecting part will not interfere with or contact the positioning table.

[0013] Furthermore, the tapered shank is provided with a scale bar that extends axially and whose extension direction is consistent with the extension direction of the guide groove.

[0014] The advantages of the thread tapping tool described in this utility model compared to the prior art are as follows: By designing the connecting part to be embedded in the guide groove and allowing axial relative displacement, the radial contact between the connecting part and the guide groove ensures that the rotational power of the taper shank can be stably transmitted to the tapping assembly. At the same time, the axial sliding of the connecting part in the guide groove provides a buffering function for axial pressure, reducing the axial force transmitted to the tap, thereby reducing the risk of tooth damage and improving the quality of thread forming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the end and bottom structure of this utility model; Figure 3 This is a schematic diagram of the conical handle in this utility model; Figure 4 This is a schematic diagram of the internal structure of the sliding sleeve in this utility model; Figure 5 This is a reference diagram showing the usage state of the scale bar in this utility model.

[0016] The attached diagram shows the following markings and corresponding component names: taper shank-100, connecting part-110, clearance hole-120, scale bar-130, guide groove-210, sliding sleeve-220, guide hole-221, positioning platform-222, assembly part-230, mounting hole-231. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Example: Reference Figure 1 The thread tapping tool provided in this embodiment includes a taper shank 10 and a tapping assembly. The taper shank 10 is used to connect to the machine tool spindle and is configured to realize rotational motion and axial feed movement under the drive of the machine tool. The taper shank 10 is provided with a connecting part 110, which is preferably a protruding structure.

[0019] The tapping assembly is provided with a guide groove 210 extending along the axial direction. The connecting part 110 is movably embedded in the guide groove 210. The shape of the connecting part 110 matches the guide groove 210, so that the connecting part 110 can be displaced relative to the guide groove 210 in the axial direction and can form an abutment fit with the wall surface of the guide groove 210 in the radial direction.

[0020] In operation, when the taper shank 10 rotates and moves axially under the machine tool drive, its connecting portion 110 drives the tapping assembly to rotate synchronously through abutment with the wall of the guide groove 210. At the same time, since the connecting portion 110 can slide axially within the guide groove 210, it can absorb part of the axial load from the taper shank 10, thereby reducing the axial force transmitted to the tapping assembly. This structural design combines efficient transmission of rotational power with axial buffering, effectively alleviating problems such as tooth profile damage caused by excessive axial pressure during traditional tapping, and improving the stability of the tapping process and the quality of thread forming.

[0021] refer to Figure 2 It is worth noting that the tapping assembly includes a sliding sleeve 220, and a guide groove 210 is formed on the outer peripheral surface of the sliding sleeve 220 and extends axially. The sliding sleeve 220 has a guide hole 221 inside, and the axial direction of the guide hole 221 is consistent with the axial direction of the guide groove 210 to ensure structural symmetry and motion coordination.

[0022] One end of the tapered shank 10 is slidably inserted into the guide hole 221 and forms a sliding fit with it. This sliding connection not only provides a stable guiding effect between the tapered shank 10 and the sliding sleeve 220, but also ensures that the sliding sleeve 220 always rotates synchronously with the tapered shank 10 during rotation through the cooperation between the connecting part 110 and the guide groove 210.

[0023] More importantly, the sliding fit structure between the guide hole 221 and the tapered shank 10 provides support and limit for the engagement state of the connecting part 110 and the guide groove 210 in the axial direction, thereby effectively preventing the sliding sleeve 220 from separating from the connecting part 110 on the tapered shank 10 during use, and improving the structural stability and operational reliability of the overall tooling.

[0024] The tapping assembly also includes an assembly 230 for mounting and securing the tap to the sleeve 220. The assembly 230 is configured to slidably insert into one end of the guide hole 221, and its axis is collinear with the axis of the guide hole 221 to ensure the coaxiality of the tap after installation, thereby improving the stability of the tapping process and the quality of thread forming.

[0025] In this embodiment, the outer periphery of the sliding sleeve 220 is provided with at least one radially extending threaded hole, and correspondingly, the outer wall of the assembly part 230 is also provided with a matching threaded hole. When the assembly part 230 slides along the guide hole 221 to a designated position, the threaded hole on the sliding sleeve 220 and the assembly part 230 are aligned with each other, and at this time, the two can be firmly connected by inserting a fastening bolt.

[0026] This detachable connection structure not only ensures the stability of the assembly part 230 during operation, preventing it from shifting or falling off due to force, but also allows operators to quickly replace different specifications of the assembly part 230 or tap according to actual processing needs, improving the versatility and ease of use of the tooling.

[0027] In some embodiments, the assembly part 230 is provided with an axially extending mounting hole 231 for receiving and fixing the tap. One end of the mounting hole 231 faces outward, and the other end communicates with the guide hole 221 inside the sliding sleeve 220. The inner wall shape of the mounting hole 231 can be adapted to the shape of the tap used, for example, it can be set as a cylinder. In addition, at least one threaded hole facing the mounting hole 231 is provided on the outer wall of the assembly part 230. The operator can screw in the fastening bolt to firmly lock the tap in the mounting hole 231 to prevent it from loosening or shifting during processing.

[0028] Because the mounting hole 231 and the guide hole 221 are axially connected, not only is the stable guidance and rotational transmission of the tap achieved, but the operator is also allowed to control the length of the tap extending from the guide hole 221 by adjusting the depth of the tap inserted into the mounting hole 231 according to the actual processing requirements, thereby adapting to different tapping depths or process requirements.

[0029] In addition, this connected structure avoids the problem of overall structural elongation caused by setting up independent clamping modules in traditional tooling, effectively shortening the axial dimension of the tooling, and improving the compactness and space utilization of the overall structure while ensuring functional integrity.

[0030] refer to Figure 3 It should be noted that the end of the taper shank 10 inserted into the guide hole 221 of the sliding sleeve 220 is provided with a clearance hole 120. The clearance hole 120 extends axially and is coaxially set with the mounting hole 231 on the assembly part 230 and the guide hole 221 of the sliding sleeve 220 to ensure that the entire tapping assembly forms a continuous axial channel in the assembled state.

[0031] Specifically, the clearance hole 120 can be formed on the end face of the portion of the taper shank 10 that is inserted into the guide hole 221, and extends axially inward for a certain distance. This structural design provides clearance space for the tail of the tap, preventing axial interference between it and the taper shank 10 during installation or operation.

[0032] In actual use, due to the certain axial relative displacement capability between the connecting part 110 and the guide groove 210 in the tapping assembly, the tap may experience slight axial floating when under force. The presence of the clearance hole 120 provides the necessary space margin for such axial movement, preventing structural jamming or damage caused by the axial displacement of the tap, and improving the stability and reliability of the tapping process.

[0033] refer to Figure 4 In other embodiments, the sliding sleeve 220 is provided with a positioning platform 222, which is formed inside the guide hole 221 of the sliding sleeve 220, and is preferably located on the side of the guide hole 221 near the insertion end of the tapered shank 10. The positioning platform 222 can be an annular boss, a stepped structure, or a multi-point distributed limiting protrusion, and its function is to provide an axial limiting reference surface for the assembly part 230.

[0034] The assembly part 230 is configured to slide axially along the guide hole 221 and abut against the positioning table 222 inside it during the sliding process. When the assembly part 230 slides to contact the positioning table 222, it is restricted from continuing to move in that direction, thereby limiting the axial position of the assembly part 230.

[0035] This limiting structure not only improves the overall structural stability of the tapping assembly, but also makes it easier for operators to quickly determine whether the assembly part 230 is in place when installing it, thus improving the assembly efficiency and reliability of the tooling.

[0036] It should be noted that in this embodiment, the guide groove 210 avoids the positioning platform 222 in the axial direction, that is, the extension range of the guide groove 210 does not cover the location area of ​​the positioning platform 222. This spatial layout design ensures that when the cone shank 10 drives the connecting part 110 to slide axially within the guide groove 210, the connecting part 110 will not interfere with or contact the positioning platform 222 disposed inside the guide hole 221.

[0037] This avoidance structure not only ensures the sliding ability of the connecting part 110 within the guide groove 210, but more importantly, it effectively isolates axial forces. Since the positioning table 222 is used to axially limit the assembly part 230, if the connecting part 110 comes into contact with it during movement, some of the axial load from the taper shank 10 may be directly transmitted to the positioning table 222 through the connecting part 110 and the guide groove 210, and then applied to the assembly part 230 and the tap, affecting machining stability and even causing tooth damage.

[0038] Therefore, by setting the axial positional relationship between the guide groove and the positioning table 222, the direct transmission path of axial force can be effectively avoided, so that the tapping assembly can bear only a limited axial load while bearing the rotational power, thereby improving the stability of the tapping process and the quality of thread forming.

[0039] refer to Figure 5 In this embodiment, the tapered shank 10 is provided with a scale bar 130 extending axially, the extension direction of which is consistent with the guide groove 210 on the sliding sleeve 220, and it is circumferentially aligned with the guide groove 210 during the assembly process, so as to facilitate the observation of the scale markings on the scale bar 130 through the guide groove 210.

[0040] The scale bar 130 is used to indicate the relative axial displacement between the taper shank 10 and the tapping assembly. Since the connecting portion 110 on the taper shank 10 can slide along the guide groove 210 to absorb part of the axial load, the change in the reading on the scale bar 130 can reflect the movement distance of the connecting portion 110 in the guide groove 210, thereby indirectly reflecting the extension amount of the tapping assembly relative to the taper shank 10.

[0041] During the actual tapping process, the operator can accurately determine the current tap feed depth by observing the changes in the values ​​on the scale bar 130 and combining this with the initial position setting. For example, before starting tapping, the scale bar 130 is set to zero. Then, as the tap shank 10 drives the tapping assembly forward, the increase in the scale value represents the increase in tapping depth.

[0042] Working principle: When tapping, the taper shank 10 is connected to the machine tool spindle and rotates under drive, feeding axially. The connecting part 110 on the taper shank 10 is embedded in the guide groove 210 of the tapping assembly, and abuts against the groove wall in the radial direction, driving the tapping assembly to rotate synchronously; at the same time, the connecting part 110 can slide axially in the guide groove 210, absorbing part of the axial load from the taper shank 10, thereby reducing the axial force transmitted to the tap and avoiding tooth damage.

[0043] The tapping assembly includes a sliding sleeve 220 and an assembly part 230. The sliding sleeve 220 has a guide hole 221 inside, into which the assembly part 230 can be slidably inserted to fix the tap. The mounting hole 231 communicates with the guide hole 221 to facilitate adjustment of the tap extension length. The sliding sleeve 220 is provided with a positioning platform 222 for axially limiting the assembly part 230, while the guide groove 210 avoids the positioning platform 222 to prevent interference when the connecting part 110 slides, thus achieving effective isolation of axial force.

[0044] The taper shank 10 has a clearance hole 120 at its end, which is coaxial with the mounting hole 231, to avoid the tail of the tap and prevent axial interference. The taper shank 10 is also provided with a scale bar 130, the direction of which is consistent with the guide groove 210, so as to facilitate the observation of scale changes through the guide groove 210, assist in judging the tapping depth, and realize quantitative control.

[0045] The various illustrative embodiments mentioned in this specification refer to specific structures described in connection with those embodiments that are included in at least one embodiment of the general description in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a structure is described in connection with any embodiment, it is intended that implementing such a structure in conjunction with other embodiments falls within the scope of this utility model.

Claims

1. A thread tapping tool, characterized in that, include: A tapered shank for connection to a machine tool, configured to rotate and move axially under the drive of the machine tool, the tapered shank having a connecting portion; The tapping assembly is provided with a guide groove extending along the axial direction; The connecting portion is movably embedded in the guide groove, thereby allowing it to undergo relative displacement axially within the guide groove and to form an abutment fit with the wall surface of the guide groove radially; wherein, When the taper shank rotates and moves axially, the contact between the connecting part and the guide groove wall causes the tapping assembly to rotate synchronously; at the same time, the connecting part undergoes relative displacement axially in the guide groove, thereby absorbing part of the axial load and protecting the tapping assembly from or reducing the axial force.

2. The thread tapping tool according to claim 1, characterized in that, The tapping assembly includes a sliding sleeve, the guide groove is formed on the sliding sleeve, and the sliding sleeve has a guide hole inside, the axis of the guide hole being consistent with the axis of the guide groove; One end of the tapered shank can be slidably inserted into the guide hole and form a sliding fit therewith.

3. The thread tapping tool according to claim 2, characterized in that, The tapping assembly further includes an assembly part that is slidably inserted into the other end of the guide hole, and whose axis is collinear with the axis of the guide hole.

4. The thread tapping tool according to claim 3, characterized in that, The assembly part is provided with an axially extending mounting hole, which is used to fix the tap and communicates with the guide hole, so that the tap can be inserted from one end of the mounting hole and extend axially into the guide hole.

5. The thread tapping tool according to claim 4, characterized in that, A clearance hole is provided on one end of the taper shank that is inserted into the guide hole. The clearance hole is coaxially arranged with the mounting hole and is used to avoid the tail of the tap.

6. The thread tapping tool according to claim 5, characterized in that, A positioning platform is provided inside the sliding sleeve, and the positioning platform is located inside the guide hole. The assembly part can slide to abut against the positioning platform.

7. The thread tapping tool according to claim 6, characterized in that, The guide groove avoids the positioning table in the axial direction, so that when the cone shank moves in the axial direction, the connecting part will not interfere with or contact the positioning table.

8. The thread tapping tool according to claim 7, characterized in that, The tapered shank is provided with a scale bar that extends axially and whose extension direction is consistent with the extension direction of the guide groove.

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