Drill bit with replaceable tool bit for numerical control machining center

Abstract

The utility model relates to the technical field of numerical control tools, in particular to a drill bit with a replaceable tool bit for a numerical control machining center, which is characterized in that the lower surface of a tool holder is fixedly connected with a threaded block, and a first limiting hole is formed in the upper surface of the tool holder around a first notch; positioning holes are formed in the lower surfaces of the lower fixing blocks; third limiting holes are formed in the side surfaces of the lower fixing blocks; an inner cavity is formed in the upper surface of the tool bit body. The tool bit has the beneficial effects that a positioning hole in a lower fixing block is aligned with a positioning block to be mounted downwards, a second limiting block is matched with a third limiting hole, and the positioning block is matched with the positioning hole, so that the threaded connection position of the tool bit main body can be effectively prevented from loosening, and the tool handle and the tool bit main body are connected into a whole by rotating a threaded block; the first limiting block is aligned with the first limiting hole and the second limiting hole to be installed downwards, and the nut is in threaded connection with the upper fixing block, so that the tool bit body, the lower fixing block and the tool handle are fixed together, the threaded connection position of the tool bit body and the tool handle is effectively prevented from loosening, and the connection stability of the tool bit body and the tool handle is improved.

Description

Technical Field

[0001] The utility model relates to the field of numerical control tools, in particular to a drill bit for a numerical control machining center with a replaceable tool head. Background Art

[0002] The CNC machining center is a high-efficiency automated machine tool composed of mechanical equipment and CNC systems, which is suitable for processing complex parts. It has strong comprehensive processing capabilities, can complete more processing content after the workpiece is clamped once, has high processing accuracy, and is suitable for batch processing of workpieces with medium processing difficulty.

[0003] In the prior art, during the processing of a CNC machining center, a drill is required to process the product.

[0004] However, currently drill bits are all of one-piece design, and during the processing, a variety of drill bits of different sizes need to be prepared, which will take up a considerable amount of funds. Once a large defect appears on the cutting edge of the tool or the dimensional accuracy is insufficient due to wear, the drill bit will be scrapped, which will bring greater manufacturing cost pressure to the company. Utility Model Content

[0005] The utility model aims to provide a drill bit for a CNC machining center with a replaceable cutter head, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drill bit for a CNC machining center with a replaceable cutter head, the drill bit for a CNC machining center with a replaceable cutter head comprises: a shank, the lower surface of the shank is fixedly connected to the threaded block, the upper surface of the shank is provided with a first notch, and the upper surface of the shank is provided with a plurality of first limiting holes located around the first notch;

[0007] A lower fixed block, wherein a positioning hole is provided on the lower surface of the lower fixed block, the upper surface of the lower fixed block is fixedly connected to the connecting rod, and a third limiting hole is provided on the side of the lower fixed block;

[0008] The cutter head body has an inner cavity formed on its upper surface.

[0009] Preferably, the threaded block can be threadedly connected to a threaded hole in an inner cavity provided on the upper surface of the cutter head body, and the threaded block is provided with a second notch penetrating the upper and lower surfaces of the threaded block.

[0010] Preferably, the first notch is a cylindrical structure, and the diameter of the first notch is equal to that of the connecting rod and the upper fixing block.

[0011] Preferably, the positioning hole is in a "cross"-shaped structure, and the positioning block can be inserted into the positioning hole.

[0012] Preferably, the upper surface of the connecting rod is fixedly connected to the lower surface of the upper fixing block, a second limiting hole is opened on the side of the upper fixing block, and a threaded matching nut arranged on the upper fixing block can fix the mounting plate on the knife handle.

[0013] Preferably, the positioning block is in a "cross"-shaped structure, the positioning block is fixedly connected to the lower surface of the inner cavity, a second limiting block is provided on the side of the inner cavity, and the second limiting block can be inserted into the third limiting hole.

[0014] Preferably, the second limiting hole is a square plate-shaped structure, the first limiting block can be inserted into the second limiting hole and the first limiting hole on the tool handle at a corresponding position, and the upper surface of the first limiting block is fixedly connected to the mounting plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The drill bit for a CNC machining center with a replaceable cutter head proposed in the utility model aligns the positioning hole on the lower fixing block with the positioning block and installs it downward, and the cooperation between the second limit block and the third limit hole and the positioning block and the positioning hole can effectively prevent the threaded connection from loosening when the cutter head body rotates at high speed, thereby causing damage to the cutter head and an increase in the product defect rate, and aligns the first notch on the tool handle with the upper fixing block and installs it downward to the thread set in the inner cavity, rotates the threaded block to connect the tool handle and the cutter head body as a whole, and then aligns the first limit block with the first limit hole and the second limit hole and installs it downward, finally, uses a nut to be threadedly connected to the upper fixing block, thereby fixing the cutter head body, the lower fixing block and the cutter handle together, effectively preventing the threaded connection between the cutter head body and the cutter handle from loosening, improving the stability of the connection between the cutter head body and the cutter handle, and improving the product processing yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structural section of the utility model;

[0019] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a schematic diagram of the local structure of the utility model;

[0021] Figure 5 for Figure 4 Enlarged structural diagram at B in the middle.

[0022] In the figure: 1, handle; 2, lower fixing block; 3, cutter head body; 4, first notch; 5, first limit hole; 6, positioning hole; 7, upper fixing block; 8, second limit hole; 9, third limit hole; 10, positioning block; 11, second limit block; 12, first limit block; 13, connecting rod; 14, nut; 15, inner cavity;

[0023] 16. Thread block; 17. Second notch; 18. Mounting plate. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] See also Figure 1-Figure 5 The utility model provides a technical solution: a drill bit for a CNC machining center with a replaceable cutter head, characterized in that: the drill bit for a CNC machining center with a replaceable cutter head comprises: a handle 1, the lower surface of the handle 1 is fixedly connected to a threaded block 16, a first notch 4 is provided on the upper surface of the handle 1, and a plurality of first limiting holes 5 are provided on the upper surface of the handle 1 located around the first notch 4; a lower fixed block 2, a positioning hole 6 is provided on the lower surface of the lower fixed block 2, the upper surface of the lower fixed block 2 is fixedly connected to a connecting rod 13, and a third limiting hole 9 is provided on the side of the lower fixed block 2; a cutter head body 3, and an inner cavity 15 is provided on the upper surface of the cutter head body 3;

[0027] During specific use, align the positioning hole 6 on the lower fixing block 2 with the positioning block 10 in the inner cavity 15 of the cutter head body 3 and install it downward, align the first notch 4 on the handle 1 with the upper fixing block 7 and install it downward, until the threaded portion 16 is threadedly connected to the cutter head body 3 at the threaded portion set in the inner cavity 15, and then align the first limiting block 12 on the lower surface of the mounting plate 18 with the first limiting hole 5 and the second limiting hole 8 and install it downward, finally, thread the nut 14 with the upper fixing block 7 and fix the mounting plate 18.

[0028] Embodiment 2

[0029] On the basis of the first embodiment, in order to facilitate the installation of the lower fixing block 2, a positioning hole 6 is provided, the positioning hole 6 is in a "cross" shaped structure, the positioning block 10 can be inserted into the positioning hole 6, the positioning block 10 is in a "cross" shaped structure, the positioning block 10 is fixedly connected to the lower surface of the inner cavity 15, and a second limiting block 11 is provided on the side of the inner cavity 15, and the second limiting block 11 can be inserted into the third limiting hole 9;

[0030] During specific use, the positioning hole 6 set on the lower surface of the lower fixed block 2 is aligned with the positioning block 10 on the lower surface of the inner cavity 15 and installed downwardly. The second limiting block 11 set on the side of the inner cavity 15 can just be inserted into the third limiting hole 9 set on the side of the lower fixed block 2. Press the upper fixed block 7 downward to install the lower fixed block 2 more conveniently.

[0031] Embodiment 3

[0032] On the basis of the second embodiment, in order to improve the stability of the cutter head body 3 during high-speed rotation, a threaded block 16 is provided, and the threaded block 16 can be threadedly connected with the threaded hole in the inner cavity 15 provided on the upper surface of the cutter head body 3, and the threaded block 16 is provided with a second notch 17 that passes through the upper and lower surfaces of the threaded block 16, and the first notch 4 is a cylindrical structure, and the first notch 4 is equal to the diameter of the connecting rod 13 and the upper fixed block 7, and the upper surface of the connecting rod 13 is fixedly connected to the lower surface of the upper fixed block 7, and a second limiting hole 8 is provided on the side of the upper fixed block 7, and a threaded matching nut 14 provided on the upper fixed block 7 can fix the mounting plate 18 on the shank 1, and the second limiting hole 8 is a square plate-shaped structure, and the first limiting block 12 can be inserted into the second limiting hole 8 and the first limiting hole 5 on the shank 1 at the corresponding position, and the upper surface of the first limiting block 12 is fixedly connected to the mounting plate 18;

[0033] During specific use, the lower fixing block 2 is installed in the inner cavity 15, and the second limit block 11 cooperates with the third limit hole 9 and the positioning block 10 cooperates with the positioning hole 6 to improve the stability of the final connection between the tool handle 1 and the tool head body 3, and can effectively prevent the threaded connection of the tool head body 3 from loosening when the tool head body 3 rotates at high speed, thereby causing damage to the tool head and an increase in the defective rate of the processed product. The first notch 4 on the tool handle 1 is aligned with the upper fixing block 7 and installed downward to the thread set in the inner cavity 15, and the threaded block 16 is rotated to thread the tool head body 3, and then the first limit block 12 on the lower surface of the mounting plate 18 is aligned with the first limit hole 5 and the second limit hole 8 and installed downward, and finally the nut 14 is threadedly connected to the upper fixing block 7 to fix the mounting plate 18, thereby fixing the lower fixing block 2 of the tool head body 3 and the tool handle 1 as a whole, effectively preventing the threaded connection between the tool head body 3 and the tool handle 1 from loosening, improving the stability of the tool head body 3 during high-speed rotation, and ensuring the processing accuracy of the workpiece.

[0034] During actual use, align the positioning hole 6 on the lower fixed block 2 with the positioning block 10 and install it downward. The cooperation between the second limit block 11 and the third limit hole 9 and the positioning block 10 and the positioning hole 6 can effectively prevent the threaded connection of the cutter head body 3 from loosening when the cutter head body 3 rotates at high speed, thereby causing damage to the cutter head and an increase in the product defect rate. Align the first notch 4 on the tool handle 1 with the upper fixed block 7 and install it downward to the thread set in the inner cavity 15. Turn the threaded block 16 to connect the tool handle 1 and the cutter head body 3 as a whole. Then align the first limit block 12 with the first limit hole 5 and the second limit hole 8 and install it downward. Finally, use the nut 14 to threadably connect with the upper fixed block 7, so as to fix the cutter head body 3, the lower fixed block 2 and the cutter handle 1 together, effectively preventing the threaded connection between the cutter head body 3 and the cutter handle 1 from loosening, improving the stability of the connection between the cutter head body 3 and the cutter handle 1, and improving the product processing yield rate.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drill bit for a CNC machining center with a replaceable cutter head, characterized in that: The drill bit for a CNC machining center with a replaceable cutter head comprises: a shank (1), the lower surface of the shank (1) being fixedly connected to a threaded block (16), the upper surface of the shank (1) being provided with a first notch (4), and the upper surface of the shank (1) being provided with a plurality of first limiting holes (5) at a location around the first notch (4); A lower fixed block (2), wherein a positioning hole (6) is provided on the lower surface of the lower fixed block (2), the upper surface of the lower fixed block (2) is fixedly connected to the connecting rod (13), and a third limiting hole (9) is provided on the side surface of the lower fixed block (2); The cutter head body (3) has an inner cavity (15) formed on its upper surface.

2. The drill bit for a CNC machining center with a replaceable cutter head according to claim 1, characterized in that: The threaded block (16) can be threadedly connected to a threaded hole in an inner cavity (15) provided on the upper surface of the cutter head body (3), and the threaded block (16) is provided with a second notch (17) penetrating the upper and lower surfaces of the threaded block (16).

3. The drill bit for a CNC machining center with a replaceable cutter head according to claim 1, characterized in that: The first notch (4) is a cylindrical structure, and the diameters of the first notch (4) and the connecting rod (13) and the upper fixing block (7) are equal.

4. The drill bit for a CNC machining center with a replaceable cutter head according to claim 1, characterized in that: The positioning hole (6) is in a "cross"-shaped structure, and the positioning block (10) can be inserted into the positioning hole (6).

5. The drill bit for a CNC machining center with a replaceable cutter head according to claim 3, characterized in that: The upper surface of the connecting rod (13) is fixedly connected to the lower surface of the upper fixing block (7); a second limiting hole (8) is provided on the side of the upper fixing block (7); and a threaded matching nut (14) provided on the upper fixing block (7) can fix the mounting plate (18) on the knife handle (1).

6. The drill bit for a CNC machining center with a replaceable cutter head according to claim 4, characterized in that: The positioning block (10) is in a "cross"-shaped structure. The positioning block (10) is fixedly connected to the lower surface of the inner cavity (15). A second limiting block (11) is provided on the side of the inner cavity (15). The second limiting block (11) can be inserted into the third limiting hole (9).

7. The drill bit for a CNC machining center with a replaceable cutter head according to claim 5, characterized in that: The second limiting hole (8) is a square plate-shaped structure, the first limiting block (12) can be inserted into the second limiting hole (8) and the first limiting hole (5) on the knife handle (1) at a corresponding position, and the upper surface of the first limiting block (12) is fixedly connected to the mounting plate (18).

Images