Stepped milling cutter

Abstract

The stepped milling cutter comprises a cutter handle, a first stepped assembly is arranged at one end of the cutter handle, a small-diameter second stepped assembly used for milling is arranged at one end of the first stepped assembly, and the first stepped assembly comprises a plurality of first chip guiding grooves formed in one end of the outer wall of the cutter handle in an annular array mode; the multiple first double-edge inverted cone blades are arranged at one end of the outer wall of the cutter handle in an annular array mode. The first cutting edge part is arranged at the end part of the cutter handle and is used for carrying out stepped milling with different apertures. By means of the arrangement mode that the first step assembly and the second step assembly are matched, the first blade part is arranged at one end of the second step assembly, so that step type cutting of different hole diameters can be conducted, the first chip guide groove and the chip guide groove in the second step assembly are opposite in position, chips can be stably discharged, and the service life of the chip guide groove is prolonged. The abrasion influence of the chippings on the first blade part and the influence on the service life of the milling cutter are reduced.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular to a stepped milling cutter. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, each cutting tooth sequentially and intermittently removes the excess material from the workpiece. Milling cutters are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces.

[0003] Application No. 202321821595.8 discloses a stepped end mill, which includes a shank and a cutting edge. The cutting edge includes multiple cutting edge portions connected in sequence with decreasing outer diameters. The cutting edge portion with the largest outer diameter is connected to the shank. The outer wall of each cutting edge portion is provided with multiple chip guide grooves distributed circumferentially, and the chip guide grooves at corresponding positions of the multiple cutting edge portions are connected in sequence. The above-mentioned stepped end mill can solve the problem of chip guide inconvenience to a certain extent. However, when the end mill is performing milling, the initial impact load during milling is borne by the cutting edge portion at the end of the end mill. The milled chips are discharged along the chip guide grooves. If different hole diameters are milled in a stepped manner, the chips in the inner cavity of the chip guide grooves tend to accumulate at the ends of different steps, making it difficult for the milled chips to be discharged. This can easily cause wear on the cutting edge at the transition stage of the steps and affect the service life of the end mill. Utility Model Content

[0004] The purpose of this invention is to provide a stepped end mill to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stepped milling cutter, comprising: a tool holder, one end of which is provided with a first stepped assembly, and one end of the first stepped assembly is provided with a second stepped assembly with a small diameter for milling, the first stepped assembly comprising:

[0006] Multiple first chip guide grooves are arranged in a ring array at one end of the outer wall of the tool holder;

[0007] Multiple first double-sided tapered cutting edges are arranged in a ring array at one end of the outer wall of the tool holder, and the first double-sided tapered cutting edges are disposed between two adjacent first chip guide grooves;

[0008] The first cutting edge is located at the end of the tool holder and is used for milling stepped holes of different diameters.

[0009] Preferably, the first cutting edge includes:

[0010] Multiple first slots are arranged in a circular array at the end of the tool holder;

[0011] Multiple first cutting edges are arranged in a circular array at the end of the tool holder;

[0012] Multiple first connecting slots are arranged in a circular array at the end of the tool holder, and the first cutting edge is disposed between the first slot and the second connecting slot.

[0013] Multiple first inclined grooves are formed on one side of the first connecting groove;

[0014] Multiple second cutting edges are arranged in a circular array at the end of the tool holder, and the second cutting edges are disposed between the first chamfer and the first slot.

[0015] Preferably, the first cutting edge and the second cutting edge are integrally formed with the end of the handle, and the second cutting edge is set at a perpendicular angle to the first cutting edge.

[0016] Preferably, the first slot communicates with the inner cavity of one of the plurality of first chip guide slots, and the first connecting slot communicates with the inner cavity of another plurality of first chip guide slots.

[0017] Preferably, the second step assembly includes:

[0018] The rod body is integrally formed and fixed to the end of the handle, and the first cutting edge is disposed on the outside of one end of the rod body;

[0019] Multiple second chip guide grooves are arranged in a ring array on the outer wall of the rod.

[0020] Multiple second double-sided inverted conical cutting edges are arranged in a circular array on the outer wall of the rod body, and the second double-sided inverted conical cutting edges are disposed between two adjacent second chip guide grooves;

[0021] The second cutting edge is disposed at the other end of the rod.

[0022] Preferably, the second cutting edge includes:

[0023] Multiple second slots are arranged in a circular array at the other end of the rod.

[0024] Multiple third cutting heads are arranged in a circular array at the other end of the rod.

[0025] Multiple second connecting slots are arranged in a circular array at the other end of the rod.

[0026] Multiple second inclined grooves are formed on one side of the second connecting groove;

[0027] Multiple fourth cutting heads are arranged in a circular array at the other end of the rod body, and the fourth cutting heads are located between the second oblique groove and the second slot.

[0028] Preferably, the third and fourth cutting edges are integrally formed with the end of the rod body, and the third and fourth cutting edges are set at a vertical angle.

[0029] The technical effects and advantages of this utility model are as follows:

[0030] This invention utilizes a combination of a first stepped component and a second stepped component. The first cutting edge is positioned at one end of the second stepped component, enabling stepped cutting of different hole diameters. Furthermore, the first chip guide groove is positioned opposite to the chip guide groove on the second stepped component, ensuring that chips from the second stepped component do not affect the milling of the first stepped component. This allows for stable chip discharge, reduces wear on the first cutting edge, improves the stability of stepped milling of the workpiece, and extends the service life of the milling cutter. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0032] Figure 2 This is a schematic diagram of the overall side structure of this utility model.

[0033] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0034] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0035] Figure 5 This utility model Figure 2 A magnified schematic diagram of the structure at point C.

[0036] In the diagram: 1. Handle; 2. First stepped assembly; 21. First chip guide groove; 22. First double-sided tapered cutting edge; 23. First cutting edge; 231. First slot; 232. First cutting edge; 233. First connecting groove; 234. First oblique groove; 235. Second cutting edge; 3. Second stepped assembly; 31. Rod body; 32. Second chip guide groove; 33. Second double-sided tapered cutting edge; 34. Second cutting edge; 341. Second slot; 342. Third cutting edge; 343. Second connecting groove; 344. Second oblique groove; 345. Fourth cutting edge. Detailed Implementation

[0037] 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.

[0038] This utility model provides, for example Figure 1-5 A stepped end mill, as shown, includes: a shank 1, which is a metal rod-shaped structure; a first stepped assembly 2 is provided at one end of the shank 1; the first stepped assembly 2 includes: a plurality of first chip guide grooves 21, a plurality of first double-sided tapered cutting edges 22, and a first cutting edge portion 23; the plurality of first chip guide grooves 21 are arranged in a ring array at one end of the outer wall of the shank 1; the first chip guide grooves 21 are spiral groove structures; the first double-sided tapered cutting edges 22 are spiral double-sided tapered structures; and the plurality of first double-sided tapered cutting edges 23... The inverted conical cutting edge 22 is arranged in a ring array at one end of the outer wall of the tool holder 1. The first double-sided inverted conical cutting edge 22 is disposed between two adjacent first chip guide grooves 21, so that the first double-sided inverted conical cutting edge 22 can grind the inner wall of the milled hole groove. The first cutting edge 23 is disposed at the end of the tool holder 1. The first cutting edge 23 is used for milling different hole diameters in a stepped manner. Through the first cutting edge 23, it is convenient to mill the workpiece, and the milled chips can be removed along the groove cavity of the first chip guide groove 21.

[0039] Specifically, the first cutting edge 23 includes: multiple first slots 231, multiple first cutting edges 232, multiple first connecting grooves 233, multiple first chamfered grooves 234, and multiple second cutting edges 235. The multiple first slots 231 are arranged in a circular array at the end of the handle 1. The multiple first cutting edges 232 are arranged in a circular array at the end of the handle 1. Each first cutting edge 232 consists of two cutting edges 232 arranged opposite to each other. The multiple first connecting grooves 233 are two connecting grooves 233 arranged in a circular array at the end of the handle 1. The first cutting edges 232 are disposed between the first slots 231 and the first connecting grooves 233. The first slots 231 connect with multiple first connecting grooves 234. The inner cavity of the chip groove 21 is connected, and the inner cavity of the first connecting groove 233 is connected to the inner cavity of the other multiple first chip guide grooves 21. The first inclined groove 234 is opened on one side of the first connecting groove 233. The multiple second cutting heads 235 are two second cutting heads 235, which are arranged in a ring array at the end of the tool holder 1. The second cutting heads 235 are disposed between the first inclined groove 234 and the first slot 231. The first cutting head 232 and the second cutting head 235 are integrally formed with the end of the tool holder 1. The second cutting head 235 is set at a perpendicular angle to the first cutting head 232, so that the two first cutting heads 232 and the two second cutting heads 235 are all inclined and stable at the end of the tool holder 1, which is convenient for milling holes of different steps.

[0040] Furthermore, one end of the first stepped assembly 2 is provided with a small-diameter second stepped assembly 3 for milling. The second stepped assembly 3 includes: a rod body 31, multiple second chip guide grooves 32, multiple second double-sided tapered cutting edges 33, and a second cutting edge portion 34. The rod body 31 is integrally formed and fixed to the end of the tool holder 1. The first cutting edge portion 23 is disposed on the outside of one end of the rod body 31. The multiple second chip guide grooves 32 are arranged in a ring array on the outer wall of the rod body 31. The second chip guide grooves 32 fit into the inner cavities of the two first slots 231 and the two first connecting grooves 233, facilitating the removal of chips milled by the second stepped assembly 3. It can enter the inner cavity of the first slot 231 and the first connecting slot 233 through the second chip guide groove 32, and perform chip removal along the multiple first chip guide grooves 21 to reduce the accumulation of chips between the rod body 31 and the tool holder 1. Multiple second double-sided inverted conical blades 33 are arranged in a ring array on the outer wall of the rod body 31. The second double-sided inverted conical blades 33 are arranged between two adjacent second chip guide grooves 32. The second cutting edge 34 is arranged at the other end of the rod body 31, so that the second cutting edge 34 can perform the first stage of milling on the workpiece, while the first cutting edge 232 can perform the second stage of milling on the workpiece with different diameters.

[0041] Specifically, the second cutting edge 34 includes: multiple second slots 341, multiple third cutting edges 342, multiple second connecting slots 343, multiple second chamfered grooves 344, and multiple fourth cutting edges 345. The multiple second slots 341 consist of two second slots 341 arranged in a circular array at the other end of the rod 31. The multiple third cutting edges 342 consist of two third cutting edges 342 arranged in a circular array at the other end of the rod 31, with the two third cutting edges 342 facing each other. The multiple second connecting slots 343 consist of two second connecting slots 343 arranged in a circular array at the other end of the rod 31. Both the second slots 341 and the second connecting slots 343 communicate with the inner cavity of the second chip guide groove 32, allowing for stable discharge of cutting chips. The multiple second chamfered grooves 344 consist of two second chamfered grooves 344. A chamfered groove 344 is formed on one side of the second connecting groove 343. Multiple fourth cutting edges 345 are arranged in two rows at the other end of the rod body 31. The fourth cutting edges 345 are positioned between the second chamfered groove 344 and the second slot 341. The third cutting edge 342 and the fourth cutting edge 345 are integrally formed with the end of the rod body 31. The third cutting edge 342 and the fourth cutting edge 345 are arranged at a perpendicular angle. The α angle between two opposing second slots 341 is 0.15-0.25 mm, and the β angle between two opposing fourth cutting edges 345 is 0.1 mm. This facilitates stable milling of the workpiece by the third cutting edge 342 and the fourth cutting edge 345, improving the stability of the milling cutter and ensuring its service life.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stepped end mill, comprising: A tool holder (1), characterized in that: a first stepped assembly (2) is provided at one end of the tool holder (1), and a second stepped assembly (3) with a small diameter for milling is provided at one end of the first stepped assembly (2), the first stepped assembly (2) comprising: Multiple first chip guide grooves (21) are arranged in a ring array at one end of the outer wall of the tool holder (1); Multiple first double-sided tapered cutting edges (22) are arranged in a ring array at one end of the outer wall of the tool holder (1), and the first double-sided tapered cutting edges (22) are disposed between two adjacent first chip guide grooves (21); The first cutting edge (23) is disposed at the end of the tool holder (1) and is used for milling stepped holes of different diameters.

2. A stepped end mill according to claim 1, characterized in that, The first cutting edge (23) includes: Multiple first slots (231) are arranged in a ring array at the end of the tool holder (1); Multiple first cutting edges (232) are arranged in a ring array at the end of the handle (1); Multiple first connecting slots (233) are arranged in a ring array at the end of the tool holder (1), and the first cutting edge (232) is disposed between the first slot (231) and the first connecting slot (233); Multiple first inclined grooves (234) are formed on one side of the first connecting groove (233); Multiple second cutting edges (235) are arranged in a ring array at the end of the tool holder (1), and the second cutting edges (235) are disposed between the first chamfer (234) and the first slot (231).

3. A stepped milling cutter according to claim 2, characterized in that, The first cutting edge (232) and the second cutting edge (235) are integrally formed with the end of the handle (1), and the second cutting edge (235) is set at a perpendicular angle to the first cutting edge (232).

4. A stepped end mill according to claim 2, characterized in that, The first slot (231) communicates with the inner cavity of one of the first chip guide slots (21), and the first connecting slot (233) communicates with the inner cavity of another one of the first chip guide slots (21).

5. A stepped end mill according to claim 2, characterized in that, The second step assembly (3) includes: The rod (31) is integrally formed and fixed to the end of the handle (1), and the first cutting edge (23) is disposed on the outside of one end of the rod (31); Multiple second chip guide grooves (32) are arranged in a ring array on the outer wall of the rod body (31); Multiple second double-sided inverted conical cutting edges (33) are arranged in a ring array on the outer wall of the rod body (31), and the second double-sided inverted conical cutting edges (33) are disposed between two adjacent second chip guide grooves (32); The second cutting edge (34) is disposed at the other end of the rod (31).

6. A stepped milling cutter according to claim 5, characterized in that, The second cutting edge (34) includes: Multiple second slots (341) are arranged in a ring array at the other end of the rod (31); Multiple third cutting edges (342) are arranged in a ring array at the other end of the rod (31); Multiple second connecting slots (343) are arranged in a ring array at the other end of the rod (31); Multiple second inclined grooves (344) are formed on one side of the second connecting groove (343); Multiple fourth cutting edges (345) are arranged in a ring array at the other end of the rod body (31), and the fourth cutting edges (345) are disposed between the second inclined groove (344) and the second slot (341).

7. A stepped end mill according to claim 6, characterized in that, The third cutting edge (342) and the fourth cutting edge (345) are integrally formed with the end of the rod body (31), and the third cutting edge (342) and the fourth cutting edge (345) are set at a vertical angle.

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