A self-centering, vibration-damping single-thread precision milling cutter

Abstract

This utility model discloses a self-centering, vibration-damping single-tooth thread milling cutter, comprising a base, a support, a connecting sleeve, a thread milling cutter body, and an axial drive mechanism. The base is fixed to an external machine tool, the support is slidably connected to the base, the connecting sleeve is fixed to one side of the support, the thread milling cutter body is connected and locked inside the connecting sleeve, and the axial drive mechanism is disposed on the base. The beneficial effects of this utility model are: by setting an axial drive mechanism, and through the friction structure between the inclined rollers and the drive roller in the axial drive mechanism, the axial driving force is directly transmitted through physical contact, enabling the support to drive the thread milling cutter body to perform axial feed motion on the base. Furthermore, due to the limitation of friction, the axial pressure of the thread milling cutter body is also simultaneously limited, achieving control over the axial feed pressure of the thread milling cutter body and avoiding the failure problem caused by mechanical impact and metal debris contamination of electronic sensors.

Description

Technical Field

[0001] This utility model relates to a thread milling cutter, specifically a self-centering, vibration-damping single-tooth thread milling cutter, belonging to the technical field of thread milling cutters. Background Technology

[0002] A thread milling cutter is a CNC tool used for high-precision thread machining. It mainly processes internal and external threads on a workpiece through milling. Traditional thread machining methods mainly involve turning threads with a thread turning tool or manually tapping and threading with taps and dies. With the development of CNC machining technology, especially the emergence of three-axis linkage CNC machining systems, a more advanced thread machining method—CNC milling of threads—has become possible. Compared with traditional thread machining methods, thread milling has significant advantages in terms of machining accuracy and efficiency.

[0003] However, most existing thread milling cutters have various problems. For example, in a high-precision thread milling cutter disclosed in publication number CN220993029U, although the tool holder is well fixed by setting a clamping component, and the tool holder is not easy to deviate during high-speed rotation, which is conducive to improving the machining accuracy of this milling cutter, in this technical solution and most current thread milling cutters, it generally needs to cooperate with the feed mechanism to feed on the workpiece during machining. In order to avoid the tool breakage due to excessive axial pressure, a pressure protection structure is generally set on the feed mechanism. Most current pressure protection structures use pressure sensors to monitor the pressure. Although this method can also achieve the pressure protection effect for thread milling cutters, the pressure sensor is subjected to mechanical shock and vibration for a long time, which can easily lead to internal circuit breakage or signal drift. Frequent maintenance is required, and the replacement cycle after sensor failure is long, which affects production efficiency. If it is not replaced in time, it may cause tool breakage and cause related economic losses. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a self-centering, vibration-damping single-tooth thread milling cutter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-centering, vibration-damping single-tooth thread milling cutter includes a base, a support, a connecting sleeve, a thread milling cutter body, and an axial drive mechanism. The base is fixed on an external machine tool, the support is slidably connected to the base, the connecting sleeve is fixed to one side of the support, the thread milling cutter body is connected and locked inside the connecting sleeve, and the axial drive mechanism is disposed on the base.

[0007] The axial drive mechanism includes a drive roller, an adjusting cylinder, a support rod, a roller, a pressure spring, and an adjusting unit. The drive roller is rotatably connected to one side of the base, and one end of the drive roller is connected to an external drive device. The adjusting cylinder is rotatably connected to the support seat and has a rectangular cavity inside. The support rod is slidably engaged in the rectangular cavity. The roller is rotatably connected to one end of the support rod and abuts against the drive roller. The pressure spring is disposed in the cavity of the adjusting cylinder, and one end abuts against the support rod. The adjusting unit is disposed on the support seat.

[0008] As a further embodiment of this utility model: the adjustment unit includes an adjustment screw, and a screw hole is provided through one end of the adjustment cylinder away from the support rod. The adjustment screw is threaded into the screw hole, and one end of the adjustment screw abuts against a pressure spring.

[0009] As a further embodiment of this utility model: the adjustment unit further includes a limiting plate, a guide groove, a positioning plate and a reset spring. The limiting plate is coaxially fixed on the adjustment cylinder and is partially provided with triangular protrusions. The guide groove is provided on the support seat. The positioning plate is slidably engaged in the guide groove and abuts against one side of the protrusion of the limiting plate. The reset spring is provided in the guide groove and one end abuts against the positioning plate.

[0010] As a further improvement of this utility model: a rectangular handle is fixed at the edge of the limiting plate, and a stop bar is fixed on the support. Two stop bars are symmetrically arranged, and the rectangular handle is located between the two stop bars.

[0011] As a further improvement of this utility model: a limiting groove is provided on the base, and a slider is fixed on the support seat, the slider being slidably engaged in the limiting groove.

[0012] As a further improvement of this utility model: a self-centering drill bit is provided on the thread milling cutter body, and a vibration damping pad is filled between the connecting cylinder and the thread milling cutter body.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, an axial drive mechanism is set up, and through the friction structure between the inclined roller and the drive roller in the axial drive mechanism, the axial drive force is directly transmitted through physical contact. This allows the support to drive the thread milling cutter body to perform axial feed motion on the base. Due to the limitation of friction, the axial pressure of the thread milling cutter body is also limited simultaneously, thereby controlling the axial feed pressure of the thread milling cutter body. This avoids damage to the thread milling cutter body due to excessive pressure and also avoids the failure problem caused by mechanical impact and metal debris contamination of the electronic sensor. Furthermore, through the setting of the adjustment unit, the spring force of the pressure spring can be adjusted by adjusting the screw, so that the pressure and friction between the roller and the drive roller can be adjusted simultaneously. This allows for rapid adjustment of the pressure during the axial feed of the thread milling cutter body, which is simple, efficient, and practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the support base and its connection structure of the present utility model;

[0017] Figure 3 This is a schematic diagram of the axial drive mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the adjusting cylinder and its overall connection structure of the present invention.

[0019] In the diagram: 1. Base, 2. Support seat, 3. Connecting cylinder, 4. Thread milling cutter body, 5. Axial drive mechanism, 51. Drive roller, 52. Adjusting cylinder, 53. Support rod, 54. Roller, 55. Pressure spring, 56. Adjusting screw, 57. Limiting plate, 58. Guide groove, 59. Positioning plate, 510. Return spring, 6. Stop bar, 7. Limiting slide groove, 8. Slider. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 4As shown, a self-centering anti-vibration single-tooth thread milling cutter includes a base 1, a support 2, a docking cylinder 3, a thread milling cutter body 4, and an axial drive mechanism 5. The base 1 is fixed on an external machine tool, the support 2 is slidably connected to the base 1, the docking cylinder 3 is fixed to one side of the support 2, the thread milling cutter body 4 is connected and locked inside the docking cylinder 3, and the axial drive mechanism 5 is set on the base 1.

[0022] The axial drive mechanism 5 includes a drive roller 51, an adjusting cylinder 52, a support rod 53, a roller 54, a pressure spring 55, and an adjusting unit. The drive roller 51 is rotatably connected to one side of the base 1, and one end of the drive roller 51 is connected to an external drive device. The adjusting cylinder 52 is rotatably connected to the support seat 2, and a rectangular cavity is opened in the adjusting cylinder 52. The support rod 53 is slidably engaged in the rectangular cavity. The roller 54 is rotatably connected to one end of the support rod 53 and abuts against the drive roller 51. The pressure spring 55 is set in the cavity of the adjusting cylinder 52, and one end abuts against the support rod 53. The adjusting unit is set on the support seat 2.

[0023] The adjustment unit includes an adjustment screw 56. A screw hole is provided through the end of the adjustment cylinder 52 away from the support rod 53. The adjustment screw 56 is threaded into the screw hole, and one end of the adjustment screw 56 abuts against the pressure spring 55.

[0024] The adjustment unit also includes a limiting plate 57, a guide groove 58, a positioning plate 59, and a return spring 510. The limiting plate 57 is coaxially fixed on the adjustment cylinder 52 and has a triangular protrusion in a part. The guide groove 58 is set on the support seat 2. The positioning plate 59 is slidably engaged in the guide groove 58 and abuts against one side of the protrusion of the limiting plate 57. The return spring 510 is set in the guide groove 58 and one end abuts against the positioning plate 59.

[0025] In this invention, an axial drive mechanism 5 is provided, and through the friction structure between the inclined roller 54 and the drive roller 51 in the axial drive mechanism 5, the axial driving force is directly transmitted through physical contact. This allows the support seat 2 to drive the thread milling cutter body 4 to perform axial feed motion on the base 1. Due to the limitation of friction, the axial pressure of the thread milling cutter body 4 is also limited simultaneously, thereby controlling the axial feed pressure of the thread milling cutter body 4. This prevents the thread milling cutter body 4 from being damaged due to excessive pressure and avoids the failure of the electronic sensor due to mechanical impact and metal debris contamination. Furthermore, through the setting of the adjustment unit, the spring force of the pressure spring 55 can be adjusted by adjusting the screw 56, so that the pressure and friction between the roller 54 and the drive roller 51 can be adjusted simultaneously. This allows for rapid adjustment of the pressure during the axial feed of the thread milling cutter body 4, which is simple, efficient, and practical. Example 2

[0026] like Figures 1 to 4As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0027] A rectangular handle is fixed at the edge of the limiting plate 57, and a stop bar 6 is fixed on the support 2. Two stop bars 6 are symmetrically arranged, and the rectangular handle is located between the two stop bars 6. The rotation angle of the adjusting cylinder 52 is limited by the stop bar 6 and the limiting plate 57.

[0028] A limiting groove 7 is provided on the base 1, and a slider 8 is fixed on the support 2. The slider 8 is slidably engaged in the limiting groove 7, so that the support 2 can slide directionally on the base 1 through the limiting groove 7.

[0029] The thread milling cutter body 4 is equipped with a self-centering drill bit, and a vibration damping pad is filled between the connecting sleeve 3 and the thread milling cutter body 4. The self-centering drill bit improves the milling accuracy, and the vibration damping pad absorbs the vibration generated during milling, further improving the milling accuracy.

[0030] Working principle: When using this thread milling cutter, first adjust the axial feed pressure of the thread milling cutter body 4 according to the actual situation. During adjustment, rotate the adjusting screw 56 to adjust the pressure spring 55 to an appropriate compression amount. Then, drive the drive roller 51 to rotate through the external drive device. At this time, the roller 54 is linked on the drive roller 51 and generates an axial force, which in turn drives the support 2 and the thread milling cutter body 4 to feed axially as a whole. When reverse movement is required, rotate the limit plate 57 and make the positioning plate 59 abut against the other side of the protrusion of the limit plate 57. At this time, the tilt angle of the roller 54 changes, which in turn drives the thread milling cutter body 4 to move in the opposite direction.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-centering, vibration-damping single-tooth thread milling cutter, comprising a base (1), a support (2), a connecting sleeve (3), a thread milling cutter body (4), and an axial drive mechanism (5), characterized in that, The base (1) is fixed on an external machine tool, the support (2) is slidably connected to the base (1), the docking cylinder (3) is fixed on one side of the support (2), the thread milling cutter body (4) is connected and locked inside the docking cylinder (3), and the axial drive mechanism (5) is set on the base (1). The axial drive mechanism (5) includes a drive roller (51), an adjusting cylinder (52), a support rod (53), a roller (54), a pressure spring (55), and an adjusting unit. The drive roller (51) is rotatably connected to one side of the base (1), and one end of the drive roller (51) is connected to an external drive device. The adjusting cylinder (52) is rotatably connected to the support seat (2), and a rectangular cavity is provided inside the adjusting cylinder (52). The support rod (53) is slidably engaged in the rectangular cavity. The roller (54) is rotatably connected to one end of the support rod (53) and abuts against the drive roller (51). The pressure spring (55) is set in the cavity of the adjusting cylinder (52), and one end abuts against the support rod (53). The adjusting unit is set on the support seat (2).

2. The self-centering, vibration-damping single-tooth thread milling cutter according to claim 1, characterized in that: The adjustment unit includes an adjustment screw (56), and a screw hole is provided through one end of the adjustment cylinder (52) away from the support rod (53). The adjustment screw (56) is threaded into the screw hole, and one end of the adjustment screw (56) abuts against the pressure spring (55).

3. The self-centering, vibration-damping single-tooth thread milling cutter according to claim 2, characterized in that: The adjustment unit also includes a limiting plate (57), a guide groove (58), a positioning plate (59), and a reset spring (510). The limiting plate (57) is coaxially fixed on the adjustment cylinder (52) and has a triangular protrusion in a part. The guide groove (58) is set on the support seat (2). The positioning plate (59) is slidably engaged in the guide groove (58) and abuts against one side of the protrusion of the limiting plate (57). The reset spring (510) is set in the guide groove (58) and one end abuts against the positioning plate (59).

4. A self-centering, vibration-damping single-tooth thread milling cutter according to claim 3, characterized in that: A rectangular handle is fixed at the edge of the limiting plate (57), and a stop bar (6) is fixed on the support (2). There are two stop bars (6) symmetrically arranged, and the rectangular handle is located between the two stop bars (6).

5. A self-centering, vibration-damping single-tooth thread milling cutter according to claim 1, characterized in that: The base (1) has a limiting groove (7), and the support (2) has a slider (8) fixed on it. The slider (8) is slidably engaged in the limiting groove (7).

6. A self-centering, vibration-damping single-tooth thread milling cutter according to claim 1, characterized in that: The thread milling cutter body (4) is equipped with a self-centering drill bit, and a vibration damping pad is filled between the connecting sleeve (3) and the thread milling cutter body (4).

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