Powerful milling chuck cutter handle of narrow slit structure

Abstract

The utility model relates to a powerful milling chuck cutter handle with a narrow slit structure, which comprises a main shaft 1 and a handle body 2 arranged on the end face of the main shaft 1, an inner hole 3 is arranged at the axis position of the handle body 2, a cutting tool is placed in the inner hole 3, a plurality of deformation retaining holes 4 are arranged on the handle body 3 along the circumferential direction, and a deformation groove 5 is arranged at one end of each deformation retaining hole 4 close to the inner hole 3. One end of the deformation groove is communicated with the deformation maintaining hole, the distance between the other end of the deformation groove and the inner hole is 1-2mm, the surface of the handle body 2 is in threaded connection with a nut 6, the nut 6 is used for compressing the handle body 2 to contract in the rotating process to clamp a cutting tool, and the problems that precision jumping is unstable, clamping force is insufficient, and clamping is unstable due to a clamping deformation structure with a straight groove formed in the hole wall are solved.

Description

Technical Field

[0001] The utility model relates to the field of tool holders for machine tools, and specifically to a powerful milling chuck tool holder with a narrow slot structure. Background Technique

[0002] In machine tools, a powerful milling tool holder is used for clamping milling cutters, drill bits, etc. with a powerful chuck. Its clamping force is much greater than that of a conventional tool holder. The working principle of the powerful milling tool holder is to compress the tool holder body to shrink through a nut to clamp the cutting tool.

[0003] A Chinese utility model patent with the publication number of CN217727872U discloses a tool collet and a tool holder, including a collet body. The collet body is provided with an insertion hole and a deformation groove. On the one hand, the collet body can generate a small amount of deformation through the deformation groove so that the machining tool can be inserted into the insertion hole, and the collet body can be inserted into the installation hole of the tool holder. On the other hand, after the collet body is inserted into the installation hole of the tool holder, the collet body can be tightened in the installation hole of the tool holder by the force generated by the deformation of the deformation groove. And after the machining tool is inserted into the insertion hole, the collet body can clamp the machining tool inserted into the insertion hole by the force generated by the deformation of the deformation groove.

[0004] However, the inventor found that the following problems exist in this device: The clamping deformation structure with straight grooves formed on the hole wall will have problems such as unstable precision jump, insufficient clamping force, and unstable clamping. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and invent a powerful milling chuck tool holder with a narrow slot structure. By changing the structure of the prior art and forming a narrow and long slot structure, the stability of various indicators is ensured, so that milling processing can be applicable from heavy-duty cutting to finishing, and the problems such as unstable precision jump, insufficient clamping force, and unstable clamping caused by the clamping deformation structure with straight grooves formed on the hole wall are solved.

[0006] For the above technical problems, the technical solution adopted by the utility model is as follows: A powerful milling chuck tool holder with a narrow slot structure includes a spindle and a tool holder body arranged on the end face of the spindle. An inner hole is opened at the axial center position of the tool holder body, and a cutting tool is placed in the inner hole. A plurality of deformation maintaining holes are opened on the tool holder body along the circumferential direction. A deformation groove is opened at one end of the deformation maintaining hole close to the inner hole. One end of the deformation groove communicates with the deformation maintaining hole, and the distance from the other end to the inner hole is 1-2 mm. A nut is threadedly connected to the surface of the tool holder body, and the nut is used to compress the tool holder body to shrink during rotation to clamp the cutting tool.

[0007] As a preference, the width of the deformation groove is 0.3-0.5 mm.

[0008] As a preference, the handle body is beveled with a taper angle of 10 - 15°.

[0009] As a preference, a "V"-shaped groove is provided on the main shaft.

[0010] As a preference, the handle body material is composed of titanium alloy 20CrMnTi.

[0011] Advantages of the present utility model:

[0012] 1. By setting the deformation groove into a narrow slit structure with a width of 0.3 - 0.5 mm and one end being 1 - 2 mm away from the inner hole, the resilience effect of the handle body can be improved, and the diameter of the inner hole can be maintained to prevent the compression diameter.

[0013] 2. By providing a deformation retention hole above the deformation groove and the deformation retention hole communicating with the deformation groove, the tension can be increased, the connection strength can be improved, and the deformation amount can be increased.

[0014] In summary, the device has the advantages of large tension, high connection strength, stable runout, etc., and is particularly suitable for the field of tool holders for machine tool tools. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the following described drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 It is a front view of a powerful milling chuck tool holder with a narrow slit structure;

[0017] Figure 2 It is a right view of a powerful milling chuck tool holder with a narrow slit structure;

[0018] Figure 3 It is Figure 1 a partial enlarged view of the position A in

[0019] Reference numerals in the drawings: 1. Main shaft; 2. Handle body; 3. Inner hole; 4. Deformation retention hole; 5. Deformation groove; 6. Nut; 41. "V"-shaped groove. Detailed Embodiments

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings.

[0021] Embodiment 1

[0022] As Figures 1 to 3As shown in the figure, a powerful milling chuck tool shank with a narrow slit structure includes a spindle 1 and a tool shank 2 provided on the end face of the spindle 1. An inner hole 3 is provided at the axial center position of the tool shank 2, and a cutting tool is placed in the inner hole 3. A plurality of deformation retaining holes 4 are provided on the tool shank 3 along the circumferential direction. A deformation groove 5 is provided at one end of the deformation retaining hole 4 close to the inner hole 3. One end of the deformation groove 5 communicates with the deformation retaining hole 4, and the distance from the other end to the inner hole 3 is 1-2 mm. A nut 6 is threadedly connected to the surface of the tool shank 2, and the nut 6 is used to compress the tool shank 2 to contract during rotation to realize the clamping of the cutting tool.

[0023] It is worth mentioning here that by making the upper end of the deformation groove 5 communicate with the lower end of the deformation retaining hole 4, the rotational tension can be increased, the connection strength can be improved, and the deformation amount can be increased.

[0024] As Figure 3 shown, the width of the deformation groove 5 is 0.3-0.5 mm.

[0025] It is worth mentioning here that by setting the deformation groove 5 into a narrow slit deformation structure, the accuracy jump stability can be improved and the clamping force can be increased.

[0026] As Figure 2 shown, the tool shank 2 is in an inclined plane, and its taper angle is 10-15°.

[0027] As Figure 1 shown, a "V"-shaped groove 41 is provided on the spindle 1.

[0028] It is worth mentioning here that by providing a "V"-shaped groove 41 on the spindle 1, the rigidity and stability of the turning tool can be improved.

[0029] The material of the tool shank 2 is composed of titanium alloy 20CrMnTi.

[0030] It is worth mentioning here that by making the material of the tool shank 2 composed of titanium alloy 20CrMnTi, the strength and rigidity of the turning tool can be greatly improved.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] Of course, in this technical solution, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" cannot be understood as a limitation on the quantity.

[0033] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art under the technical disclosure of the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A strong milling chuck handle with a narrow gap structure, comprising a spindle (1) and a handle body (2) arranged on the end surface of the spindle (1), characterized in that: An inner hole (3) is provided at the axial center of the handle body (2), and the inner hole (3) is used to place a cutting tool. A plurality of deformation retaining holes (4) are provided on the handle body (3) along the circumferential direction. A deformation groove (5) is provided on the deformation retaining hole (4) close to the inner hole (3). One end of the deformation groove (5) is connected to the deformation retaining hole (4) and the other end is 1-2 mm away from the inner hole (3). A nut (6) is threadedly connected to the surface of the handle body (2), and the nut (6) is used to compress the handle body (2) during rotation to achieve the clamping of the cutting tool.

2. A strong milling chuck handle with a narrow gap structure according to claim 1, characterized in that: The width of the deformation groove (5) is 0.3-0.5 mm.

3. A strong milling chuck handle with a narrow gap structure according to claim 1, characterized in that: The handle body (2) is in the form of an inclined surface, and its taper angle is 10-15°.

4. A strong milling chuck handle with a narrow gap structure according to claim 1, characterized in that: The main shaft (1) is provided with a V-shaped groove (41).

5. The strong milling chuck handle with narrow gap structure according to claim 1 is characterized in that: The handle body (2) is made of a titanium alloy 20CrMnTi.

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