A rotatably positionable tool bit

Abstract

The utility model relates to the technical field of milling cutter, and disclose a rotatable positioning's tool bit, including disc milling cutter head, the handle, the arrangement and installation of several blade in disc milling cutter head top, the middle part of disc milling cutter head is opened in and has the internal thread hole, and the internal thread hole internal thread is connected with the handle same fixed composite screw rod of central axis, the bottom of disc milling cutter head is opened in and has the positioning hole, the middle part of composite screw rod is opened in and has the half open work type groove alignment with positioning hole, and half open work type groove inner sleeve has elastic positioning rod spare. The utility model discloses the positioning hole of setting up in the bottom of disc milling cutter head through the setting up of internal thread sleeve, elastic positioning rod spare and disc milling cutter head, and the linkage clamping positioning is positioned after disc milling cutter head and composite screw rod thread connection, further promotes the axial load of disc milling cutter head and composite screw rod assembly in the subsequent use process, and can solve the use loosening problem of disc milling cutter head and composite screw rod.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to a rotatable and positionable cutting head. Background Technology

[0002] CNC milling cutters are generally rotary cutting tools with one or more cutting teeth used for milling. When in use, each cutting tooth cuts off the excess material of the workpiece in turn. They can meet the machining processes of steps, grooves, shaped surfaces and cutting off workpieces, and have a wide range of applications.

[0003] Currently, CNC cutting tools, in addition to cutting inserts, also include accessories such as tool holders and tool shanks. Some tools adopt an integrated structure design, such as disc milling cutters. However, although integrated milling cutters can achieve good compressive strength and structural strength, once the cutter head is damaged, the rest of the tool cannot be used, resulting in high usage and maintenance costs. Utility Model Content

[0004] This invention provides a rotatable and positionable cutting head, which solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a rotatable positioning cutter head, including a disc milling cutter head, a cutter handle, and a plurality of blades arranged and installed on the top of the disc milling cutter head. The disc milling cutter head has an internal threaded hole in the middle, and the internal threaded hole is internally threaded with a composite screw fixed to the same central axis as the cutter handle.

[0006] The bottom of the disc milling cutter head is provided with a positioning hole, and the middle part of the composite screw is provided with a semi-open I-shaped groove aligned with the positioning hole. An elastic positioning rod is fitted inside the semi-open I-shaped groove. The surface of the composite screw is threaded with an internal thread sleeve, and the elastic positioning rod can be fitted and positioned with the positioning hole under the helical pressing drive of the internal thread sleeve.

[0007] Preferably, a limiting hole is provided in the middle of the disc milling cutter head, and an assembly block fixed to the top of the composite screw is engaged in the limiting hole. The engaging effect between the assembly block and the limiting hole further guides the assembly of the composite screw and the cutting tool and ensures the assembly accuracy.

[0008] Preferably, the elastic positioning rod includes an I-shaped positioning rod body, one end of which is engaged in the bottom of the semi-open I-shaped groove, and the other end of which can penetrate the semi-open I-shaped groove and be engaged in the interior of the positioning hole to position the milling cutter head and the composite screw assembly. The engagement and positioning of the elastic positioning rod with the positioning hole can improve the axial load of the overall device during subsequent cutting and use of the overall device.

[0009] Preferably, a return spring is fitted around the middle of the I-shaped positioning rod, and the two ends of the return spring are respectively fixed to the inner wall of the semi-open I-shaped groove and the surface of the other end of the I-shaped positioning rod. The return spring provides the moving power for the automatic reset of the I-shaped positioning rod when it is not in use.

[0010] Preferably, a damping block is fixed to the other end of the I-shaped positioning rod. After the I-shaped positioning rod is engaged with the positioning hole, the damping block can fill the gap between the I-shaped positioning rod and the positioning hole. After the damping block is linked with the return spring, it can dampen and buffer the vibrations experienced by the I-shaped positioning rod and the positioning hole during the engagement and positioning assembly process, thus ensuring the connection strength.

[0011] Preferably, the surface of the internal threaded sleeve has several arc-shaped grooves along its circumference, and the corners of the surface structure of the internal threaded sleeve are all set as rounded corners to avoid scratches and ensure comfort during use.

[0012] Preferably, an elastic folding cylinder is fitted on the outer bottom of the composite screw. The top and bottom of the elastic folding cylinder are respectively fixed with a linkage ring that fits the bottom surface of the inner threaded sleeve and a ring that is fixed on the top surface of the handle. The elastic folding cylinder can fold and contract or expand as the inner threaded sleeve moves. The elastic folding cylinder can provide dust protection for the exposed thread structure of the inner threaded sleeve during the spiral pressing transmission of the inner threaded sleeve without interfering with the transmission.

[0013] Preferably, the linkage ring is made of magnetic material and can be magnetically connected to the internal threaded sleeve, thereby further optimizing the linkage effect between the internal threaded sleeve and the elastic folding cylinder without interfering with the spiral adjustment process of the internal threaded sleeve.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model uses an internal threaded sleeve, an elastic positioning rod, and a positioning hole at the bottom of the disc milling cutter head to achieve a linkage and locking positioning after the disc milling cutter head and the composite screw are threaded together. This further improves the axial load of the disc milling cutter head and the composite screw assembly during subsequent use, while also solving the problem of loosening of the disc milling cutter head and the composite screw during use.

[0016] 2. The tool holder structure formed by the disc milling cutter head, composite screw, and tool holder of this utility model is flexible to assemble. The elastic positioning rod and composite screw are technical structures that can be reciprocated and disassembled, thereby ensuring the flexibility of changing the disc milling cutter head and cutting tool.

[0017] 3. This utility model uses an elastic folding cylinder that is linked to the internal threaded sleeve via a linkage ring. This allows the internal threaded sleeve to contract or expand synchronously during its spiraling process, ensuring that the exposed thread structure of the internal threaded sleeve is always protected from dust and thus guaranteeing the effective service life of the entire device. Attached Figure Description

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

[0019] Figure 2 This is a three-dimensional schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a front view schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a top view schematic diagram of the structure of the disc milling cutter head of this utility model;

[0022] Figure 5 This is a bottom view schematic diagram of the structure of the disc milling cutter head of this utility model;

[0023] Figure 6 The structure of this utility model Figure 1 Enlarged diagram of point A in the middle.

[0024] In the diagram: 1. Disc milling cutter head; 2. Insert; 3. Composite screw; 4. Tool holder; 5. Positioning hole; 6. Semi-open I-groove; 7. Elastic positioning rod; 71. I-shaped positioning rod body; 72. Return spring; 73. Damping block; 8. Internal threaded sleeve; 9. Elastic folding cylinder; 10. Linkage ring. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-6 A rotatable positioning cutter head includes a disc milling cutter head 1, a cutter handle 4, and several inserts 2 arranged and installed on the top of the disc milling cutter head 1. The disc milling cutter head 1 has an internal threaded hole in the middle, and a composite screw 3 fixed to the same central axis as the cutter handle 4 is internally threaded into the internal threaded hole. The disc milling cutter head 1 has a limit hole in the middle, and an assembly block fixed to the top of the composite screw 3 is engaged in the limit hole. The engagement effect between the assembly block and the limit hole further guides the assembly of the composite screw 3 and the inserts 2 and ensures the assembly accuracy.

[0027] The bottom of the milling cutter head 1 is provided with a positioning hole 5. The middle part of the composite screw 3 is provided with a semi-open I-shaped groove 6 aligned with the positioning hole 5. An elastic positioning rod 7 is fitted inside the semi-open I-shaped groove 6. The surface of the composite screw 3 is threadedly connected with an internal thread sleeve 8. The surface of the internal thread sleeve 8 is provided with several arc-shaped grooves along its own structure circumference. The edges and corners of the surface structure of the internal thread sleeve 8 are all set with rounded corners to avoid scratches and ensure comfort during use. The elastic positioning rod 7 can be fitted and positioned with the positioning hole 5 under the helical pressing drive of the internal thread sleeve 8.

[0028] The elastic positioning rod 7 includes an I-shaped positioning rod body 71. One end of the I-shaped positioning rod body 71 is engaged in the bottom of the semi-open I-shaped groove 6, and the other end of the I-shaped positioning rod body 71 can pass through the semi-open I-shaped groove 6 and be engaged in the interior of the positioning hole 5 to position the milling cutter head 1 and the composite screw 3 during assembly. The engagement and positioning of the elastic positioning rod 7 and the positioning hole 5 can improve the axial load of the overall device during subsequent cutting and use of the overall device.

[0029] When in use, for the use of the disc milling cutter formed by the disc milling cutter head 1 and the cutting blade 2 installed on the top of the disc milling cutter head 1, the composite screw 3 can be threaded to the internal thread hole on the inner side of the middle of the disc milling cutter head 1, so that the disc milling cutter can be integrated with the tool holder 4 through the composite screw 3, ensuring the structural strength and compressive resistance of subsequent cutting.

[0030] After the milling cutter head 1 and the composite screw 3 are assembled, the internal thread sleeve 8 is turned so that the internal thread sleeve 8 presses against the elastic positioning rod 7 as it spirals upward on the surface of the composite screw 3, until the I-shaped positioning rod 71 inside the elastic positioning rod 7 is engaged in the corresponding positioning hole 5. Then, the I-shaped positioning rod 71 is engaged with the positioning hole 5 to further improve the axial load of the overall device during operation.

[0031] Please see Figure 1 , Figure 6 A return spring 72 is fitted around the middle of the I-shaped positioning rod 71. The two ends of the return spring 72 are fixed to the inner wall of the semi-open I-shaped groove 6 and the surface of the other end of the I-shaped positioning rod 71, respectively. The return spring 72 provides the moving power for the automatic reset of the I-shaped positioning rod 71 when it is not in use. A damping block 73 is fixed to the other end of the I-shaped positioning rod 71. After the I-shaped positioning rod 71 is engaged with the positioning hole 5, the damping block 73 can fill the gap between the I-shaped positioning rod 71 and the positioning hole 5. After the damping block 73 and the return spring 72 are linked, they can dampen and buffer the vibrations experienced by the I-shaped positioning rod 71 and the positioning hole 5 during the engagement and positioning assembly process, so as to ensure the connection strength.

[0032] When in use, considering that the connection between the composite screw 3 and the disc milling head 1 may easily loosen due to operational vibration during continuous use, in addition to using the I-shaped positioning rod 71 and the positioning hole 5 for positioning and locking to prevent loosening, the damping block 73 and the return spring 72 can be linked together to dampen and buffer the vibration suffered by the connection between the composite screw 3 and the disc milling head 1.

[0033] Please see Figure 2 , Figure 6 The bottom outer side of the composite screw 3 is fitted with an elastic folding cylinder 9. The top and bottom of the elastic folding cylinder 9 are respectively fixed with a linkage ring 10 that fits the bottom surface of the inner threaded sleeve 8 and a linkage ring 10 that is fixed to the top surface of the handle 4. The elastic folding cylinder 9 can fold and contract or expand as the inner threaded sleeve 8 moves. The elastic folding cylinder 9 can provide dust protection for the exposed thread structure of the inner threaded sleeve 8 during the spiral pressing transmission of the inner threaded sleeve 8 without interfering with the spiral pressing transmission of the inner threaded sleeve 8. The linkage ring 10 is made of magnetic material and can be magnetically connected to the inner threaded sleeve 8. Thus, while not interfering with the spiral adjustment process of the inner threaded sleeve 8, the linkage effect of the inner threaded sleeve 8 and the elastic folding cylinder 9 can be further optimized.

[0034] In use, considering the practical problem that the waste chips at the cutting site can easily interfere with the use of the exposed thread structure of the internal thread sleeve 8, the elastic folding cylinder 9 is linked with the internal thread sleeve 8 through the linkage ring 10. That is, it contracts or expands synchronously during the spiral process of the internal thread sleeve 8, and always provides dust protection for the exposed thread structure of the internal thread sleeve 8.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotatable positioning cutter head, comprising a disc milling cutter head (1), a cutter holder (4), and a plurality of cutting inserts (2) arranged and mounted on the top of the disc milling cutter head (1), characterized in that: The milling cutter head (1) has an internal threaded hole in the middle, and the internal threaded hole is connected to a composite screw (3) that is fixed to the same central axis as the cutter handle (4). The bottom of the milling cutter head (1) is provided with a positioning hole (5), and the middle part of the composite screw (3) is provided with a semi-open I-shaped groove (6) aligned with the positioning hole (5). An elastic positioning rod (7) is fitted inside the semi-open I-shaped groove (6). The surface of the composite screw (3) is threaded with an internal thread sleeve (8), and the elastic positioning rod (7) can be fitted and positioned with the positioning hole (5) under the helical pressing drive of the internal thread sleeve (8).

2. The rotatable positioning cutter head according to claim 1, characterized in that: The milling cutter head (1) has a limiting hole in the middle, and an assembly block fixed to the top of the composite screw (3) is engaged in the limiting hole.

3. The rotatable positioning cutter head according to claim 1, characterized in that: The elastic positioning rod (7) includes an I-shaped positioning rod body (71). One end of the I-shaped positioning rod body (71) is engaged in the bottom of the semi-open I-shaped groove (6), and the other end of the I-shaped positioning rod body (71) can pass through the semi-open I-shaped groove (6) and be engaged in the interior of the positioning hole (5) to position the assembly of the disc milling cutter head (1) and the composite screw (3).

4. The rotatable positioning cutter head according to claim 3, characterized in that: The middle part of the I-shaped positioning rod (71) is fitted with a return spring (72), and the two ends of the return spring (72) are respectively fixed on the inner wall of the semi-open I-shaped groove (6) and the surface of the other end of the I-shaped positioning rod (71).

5. A rotatable positioning cutter head according to claim 3, characterized in that: A damping block (73) is fixed at the other end of the I-shaped positioning rod (71), and the damping block (73) can fill the gap between the I-shaped positioning rod (71) and the positioning hole (5) after the I-shaped positioning rod (71) is engaged with the positioning hole (5).

6. The rotatable positioning cutter head according to claim 1, characterized in that: The surface of the internal threaded sleeve (8) is provided with several arc-shaped grooves along its own circumference, and the corners of the surface structure of the internal threaded sleeve (8) are all set as rounded corners.

7. A rotatable positioning cutter head according to claim 1, characterized in that: The bottom outer side of the composite screw (3) is fitted with an elastic folding cylinder (9). The top and bottom of the elastic folding cylinder (9) are respectively fixed with a linkage ring (10) that fits the bottom surface of the inner thread sleeve (8) and a ring that is fixed on the top surface of the handle (4). The elastic folding cylinder (9) can fold, shrink or expand as the inner thread sleeve (8) moves.

8. A rotatable positioning cutter head according to claim 7, characterized in that: The linkage ring (10) is specifically made of magnetic material, and the linkage ring (10) can be magnetically connected to the internal threaded sleeve (8).

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