Milling cutter with replaceable head

Abstract

The utility model provides a head-replaceable milling cutter which comprises an installation assembly, and the installation assembly comprises a cutter handle body, a spline groove, a conical nut, three positioning clamping jaws and a pin shaft. The spline groove is formed in one end of the cutter handle body, the inner side wall of the conical nut is in threaded connection with the outer side wall of the cutter handle body, the milling cutter body and the cutter handle body can be kept coaxial all the time according to the three-point positioning principle, and therefore the installation precision is guaranteed, and the manufacturing cost is reduced. The milling cutter body and the cutter handle body are connected through the spline groove and the positioning spline, double fixation is achieved through the positioning clamping jaw and the set screw, vibration and loosening are not prone to being generated, the milling precision is prevented from being affected, the milling cutter can conduct reverse milling, and the problem that after the milling cutter is broken, the part of the positioning spline is left in the spline groove and is difficult to remove is solved. The problems that an existing head-replaceable milling cutter is high in manufacturing cost, prone to vibration, incapable of reversely rotating for milling and the like can be solved.

Description

Technical Field

[0001] The utility model relates to a machine tool cutter, in particular to a replaceable head milling cutter, belonging to the technical field of metal cutting. Background Technique

[0002] A milling cutter is a rotating cutter used for milling processing and having one or more milling cutter grains; when working, each milling cutter grain intermittently cuts off the surplus of the workpiece in turn.

[0003] Traditional milling processing mostly uses integral milling cutters. The integral milling cutter mainly includes two parts: a cutting edge and a tool shank. The cutting edge is mainly used for cutting processing, and the tool shank is mainly used for clamping and fixing the milling cutter. The integral milling cutter has the following disadvantages: 1. The whole is made of high-performance materials such as cemented carbide, resulting in waste of resources and too high cost; 2. When changing the cutter during different processing procedures, it is necessary to re-clamp and position the milling cutter, resulting in cumbersome operation and reduced accuracy; 3. The lengths of the cutting edge and the tool shank are fixed, and the length cannot be adjusted during special procedures such as machining slender holes, so the application range is limited. Based on this, there are already replaceable head milling cutters on the market. Although the problems of integral milling cutters are solved, there are also the following deficiencies: 1. The cutting edge and the tool shank are connected by threads. In order to ensure the installation and positioning accuracy of the cutting edge and the tool shank, it is necessary to improve the machining accuracy of the threads, resulting in too high manufacturing cost; 2. Vibration is likely to occur at the thread connection, affecting the milling accuracy; 3. The milling cutter cannot perform reverse milling, otherwise the thread will become loose, and once the thread breaks, it is very difficult to take out the screw rod remaining in the inner hole of the tool shank. Therefore, a replaceable head milling cutter tool is proposed. Content of the Utility Model

[0004] In view of this, the utility model provides a replaceable head milling cutter tool to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the utility model is realized as follows: The replaceable head milling cutter tool includes

[0006] an installation component, and the installation component includes a tool shank body, a spline groove, a tapered nut, three positioning jaws and a pin shaft;

[0007] The spline groove is opened at one end of the tool shank body. The inner side wall of the tapered nut is threadedly connected to the outer side wall of the tool shank body. One side of each of the three positioning jaws is installed on the outer side wall of the tool shank body through the pin shaft, and the positioning jaws are annularly and equidistantly distributed on the outer side wall of the tool shank body.

[0008] Further preferably, a torsion spring is sleeved on the outer side wall of the pin shaft.

[0009] Further preferably, one end of the torsion spring is fixedly connected to one side of the positioning jaw.

[0010] Further preferably, an external thread is provided on the outer side wall of the tool handle body.

[0011] Further preferably, a set screw is installed on the outer side wall of the tool handle body.

[0012] Further preferably, the outer side wall of the set screw is threadedly connected to the inside of the tool handle body.

[0013] Further preferably, a cutter head assembly is provided on one side of the mounting assembly; the cutter head assembly includes a milling cutter body and a positioning spline, and one side of the positioning spline is installed at one end of the milling cutter body.

[0014] Further preferably, the outer side wall of the positioning spline is installed inside the spline groove.

[0015] Due to the adoption of the above technical solutions in the embodiments of the present utility model, it has the following advantages:

[0016] The present utility model enables the milling cutter body to always maintain coaxiality with the tool handle body by utilizing the three-point positioning principle, thereby ensuring the installation accuracy, reducing the manufacturing cost. The milling cutter body and the tool handle body are connected through a spline groove and a positioning spline, and are fixed by a positioning jaw and a set screw in a dual manner, which is not prone to vibration and loosening, thus avoiding affecting the milling accuracy. The milling cutter can perform reverse milling, and there is no need to worry about the problem that part of the positioning spline remains in the spline groove and is difficult to remove after the milling cutter breaks. It can solve the problems of high manufacturing cost, easy vibration, and inability to perform reverse milling of the existing replaceable head milling cutter.

[0017] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will be readily apparent by referring to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is the exploded structure diagram of the present utility model;

[0020] Figure 2 is the structure diagram of the present utility model;

[0021] Figure 3Side view structure diagram of the present utility model;

[0022] Figure 4 Structure diagram of the installation component of the present utility model.

[0023] Reference numerals: 101, installation component; 10, tool holder body; 11, spline groove; 12, tapered nut; 13, positioning jaw; 14, pin shaft; 15, torsion spring; 16, set screw; 17, external thread; 201, tool head component; 20, milling cutter body; 21, positioning spline. Specific embodiments

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0025] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0026] As Figures 1-4 shown, the embodiment of the present utility model provides a replaceable head milling cutter tool, including an installation component 101 and a tool head component 201;

[0027] The installation component 101 includes a tool holder body 10, a spline groove 11, a tapered nut 12, three positioning jaws 13 and a pin shaft 14;

[0028] The spline groove 11 is opened at one end of the tool holder body 10, the inner side wall of the tapered nut 12 is threadedly connected to the outer side wall of the tool holder body 10, one side of each of the three positioning jaws 13 is installed on the outer side wall of the tool holder body 10 through the pin shaft 14, and the positioning jaws 13 are annularly and equidistantly distributed on the outer side wall of the tool holder body 10.

[0029] In one embodiment, a torsion spring 15 is sleeved on the outer side wall of the pin shaft 14. One end of the torsion spring 15 is fixedly connected to one side of the positioning jaw 13. An external thread 17 is provided on the outer side wall of the tool holder body 10. The outer side wall of the set screw 16 is threadedly connected to the inside of the tool holder body 10. During use, the tapered nut 12 is rotated to make the tapered nut 12 move upward along the tool holder body 10, so that the positioning jaw 13 is loosened. By providing a spline groove 11 at one end of the tool holder body 10, the positioning spline 21 can be inserted into the spline groove 11 according to the required length. Then the tapered nut 12 is rotated to make the tapered nut 12 move downward along the tool holder body 10. The tapered nut 12 squeezes the positioning jaw 13, so that the three positioning jaws 13 clamp the milling cutter body 20 at the same time. Using the three-point positioning principle, the milling cutter body 20 can always maintain good coaxiality with the tool holder body 10, thus ensuring the installation accuracy. Finally, the set screw 16 is tightened to better fix the milling cutter body 20 on the tool holder body 10. When replacing the milling cutter body 20, reverse the above steps.

[0030] In one embodiment, a cutter head assembly 201 is provided on one side of the mounting assembly 101; the cutter head assembly 201 includes a milling cutter body 20 and a positioning spline 21. One side of the positioning spline 21 is mounted at one end of the milling cutter body 20. The outer side wall of the positioning spline 21 is mounted inside the spline groove 11. Through the settings of the positioning spline 21 and the spline groove 11, it plays an accurate guiding role in the installation of the milling cutter body 20, avoiding the position deviation of the milling cutter body 20 and resulting in the inclination of the installation of the milling cutter body 20.

[0031] When the utility model is working: During use, the tapered nut 12 is rotated to make the tapered nut 12 move upward along the tool holder body 10, so that the positioning jaw 13 is loosened. By providing a spline groove 11 at one end of the tool holder body 10, the positioning spline 21 can be inserted into the spline groove 11 according to the required length. Then the tapered nut 12 is rotated to make the tapered nut 12 move downward along the tool holder body 10. The tapered nut 12 squeezes the positioning jaw 13, so that the three positioning jaws 13 clamp the milling cutter body 20 at the same time. Using the three-point positioning principle, the milling cutter body 20 can always maintain good coaxiality with the tool holder body 10, thus ensuring the installation accuracy. Finally, the set screw 16 is tightened to better fix the milling cutter body 20 on the tool holder body 10. When replacing the milling cutter body 20, the set screw 16 is loosened to release the fixation of the milling cutter body 20 by the set screw 16. The tapered nut 12 is rotated to make the tapered nut 12 move upward along the tool holder body 10, and the three positioning jaws 13 move away from the milling cutter body 20 at the same time, so that the positioning jaw 13 releases the fixation of the milling cutter body 20. At this time, the milling cutter body 20 can be removed for replacement.

[0032] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims described above.

Claims

1. A replaceable head milling cutter tool, characterized in that, including an installation component (101), the installation component (101) includes a tool shank body (10), a spline groove (11), a tapered nut (12), three positioning jaws (13) and a pin shaft (14); the spline groove (11) is opened at one end of the tool shank body (10), the inner side wall of the tapered nut (12) is threadedly connected to the outer side wall of the tool shank body (10), one side of each of the three positioning jaws (13) is mounted on the outer side wall of the tool shank body (10) through the pin shaft (14), and the positioning jaws (13) are annularly and equidistantly distributed on the outer side wall of the tool shank body (10).

2. The replaceable head milling cutter tool according to claim 1, wherein: A torsion spring (15) is sleeved on the outer side wall of the pin shaft (14).

3. The replaceable head milling cutter according to claim 2, wherein: One end of the torsion spring (15) is fixedly connected to one side of the positioning jaw (13).

4. The replaceable head milling cutter tool according to claim 2, characterized in that: An external thread (17) is opened on the outer side wall of the tool shank body (10).

5. The replaceable head milling cutter tool according to claim 4, characterized in that: A set screw (16) is mounted on the outer side wall of the tool shank body (10).

6. The replaceable head milling cutter tool according to claim 5, wherein: The outer side wall of the set screw (16) is threadedly connected to the inside of the tool shank body (10).

7. The replaceable head milling cutter according to claim 2, wherein: A tool head component (201) is arranged on one side of the installation component (101); the tool head component (201) includes a milling cutter body (20) and a positioning spline (21), and one side of the positioning spline (21) is mounted at one end of the milling cutter body (20).

8. The replaceable head milling cutter tool according to claim 7, characterized in that: The outer side wall of the positioning spline (21) is mounted inside the spline groove (11).

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