Hard tungsten steel milling cutter capable of automatically breaking chips

Abstract

The utility model discloses a hard tungsten steel milling cutter capable of automatically breaking chips. The hard tungsten steel milling cutter comprises a milling cutter arbor, a plurality of waste chip guide grooves are formed in the bottom of the milling cutter arbor, a hexagonal mounting shaft is arranged at the upper end of the milling cutter arbor, a water guide cavity is formed in the milling cutter arbor, and drainage holes communicated with water guide grooves are formed in the bottom ends of the waste chip guide grooves. The milling cutter has the beneficial effects that cooling water enters the water guide cavity through the arrangement of the water inlet pipe and the water inlet groove and the matching of the water inlet pipe and the water inlet groove and the water inlet hole, so that the water flow is discharged through the water discharge hole, and the milling cutter rod cools the surface of the milling cutter rod in the process of milling a workpiece so as to achieve the effect of protecting the milling cutter rod; and cooling water is discharged, so that sweeps generated in the milling process are cooled, the sweeps are rapidly cooled, and the sweeps become brittle, the metal sweeps are more easily broken, the metal sweeps are twisted in the rotating process of the milling cutter rod, and the effect of conveniently breaking the sweeps is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control milling cutters, and more specifically, to a hard tungsten steel milling cutter capable of automatically breaking chips. Background Art

[0002] In order to improve the service life of the milling cutter and enhance wear resistance, a protective layer is generally applied to the tungsten steel milling cutter. The protective layer of the tungsten steel milling cutter is usually a material called "tungsten carbide". Tungsten carbide is a very hard material, second only to diamond in hardness, and has excellent wear resistance and corrosion resistance.

[0003] However, the existing milling cutters are difficult to cut the turning chips during the cutting process, resulting in the waste chips generated during milling winding around the surface of the milling cutter. As a result, it is easy to cause the milling cutter to overheat, leading to stress changes in the milling cutter and causing the milling cutter to be scrapped. Moreover, the too-long waste chips are likely to rotate with the milling cutter during the milling process, easily scratching the surface of the workpiece, resulting in the need for grinding and polishing of the workpiece after milling, thereby reducing the working efficiency of milling.

[0004] For the problems in the related art, no effective solution has been proposed yet. Summary of the Utility Model

[0005] In view of the problems in the related art, the utility model provides a hard tungsten steel milling cutter capable of automatically breaking chips to overcome the above-mentioned technical problems existing in the existing related art.

[0006] Specifically, the technical solution adopted by the utility model is as follows:

[0007] A hard tungsten steel milling cutter capable of automatically breaking chips includes a milling cutter rod. A plurality of waste chip guide grooves are provided at the bottom of the milling cutter rod. A hexagonal mounting shaft is provided at the upper end of the milling cutter rod. A water guide cavity is arranged inside the milling cutter rod. A drainage hole communicating with the water guide groove is provided at the bottom end of the waste chip guide groove. A chip breaking mechanism is arranged inside the drainage hole. An inlet water mechanism is arranged at the upper end of the outer surface of the milling cutter rod.

[0008] Further, the drainage hole is a tapered hole, and the diameter of the end of the drainage hole close to the water guide cavity is larger than the diameter of the end far from the water guide cavity.

[0009] Further, the inlet water mechanism includes a rotating ring sleeved on the upper end of the milling cutter rod. A water inlet pipe is arranged at one end of the rotating ring, and a water inlet groove is formed inside the rotating ring.

[0010] Further, a water inlet hole is arranged at the position of the milling cutter rod corresponding to the rotating ring, and the rotating ring is rotatably connected to the milling cutter rod through a bearing.

[0011] Furthermore, the chip breaking mechanism includes a mounting bracket located inside the drain hole, and a chip breaking rotating shaft is provided in the middle of the mounting bracket.

[0012] Furthermore, one end of the chip breaking rotating shaft protrudes from the drain hole, and a water guiding fan blade is provided at one end of the chip breaking rotating shaft close to the water guiding cavity.

[0013] The utility model provides a cemented tungsten carbide milling cutter capable of automatically breaking chips, and the beneficial effects are as follows:

[0014] 1. In the utility model, by arranging the cooling water through the water inlet pipe and the water inlet tank to cooperate with the water inlet hole, the cooling water enters the inside of the water guiding cavity, and then the water flows out through the drain hole, so that the surface of the milling cutter rod is cooled during the milling process of the workpiece to achieve the effect of protecting the milling cutter rod.

[0015] 2. By discharging the cooling water, the waste chips generated during the milling process are cooled, so that the waste chips are quickly cooled and become brittle, and then it is easier to break the metal waste chips. When the milling cutter rod rotates, the metal waste chips are twisted, achieving the effect of facilitating chip breaking.

[0016] 3. Through the arrangement that one end of the chip breaking rotating shaft protrudes from the drain hole, the chip breaking rotating shaft guides the waste chips entering the waste chip guiding groove, changing their moving direction. Since the waste chips become brittle due to rapid cooling, when the moving direction changes, the waste chips deflect, resulting in the effect of waste chip fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of a cemented tungsten carbide milling cutter capable of automatically breaking chips according to an embodiment of the present utility model;

[0019] Figure 2 is an internal structural diagram of a cemented tungsten carbide milling cutter capable of automatically breaking chips according to an embodiment of the present utility model;

[0020] Figure 3 is a cemented tungsten carbide milling cutter capable of automatically breaking chips according to an embodiment of the present utility model Figure 2 partial enlarged view.

[0021] In the figure:

[0022] 1. Milling cutter bar; 2. Chip guide groove; 3. Hexagonal mounting shaft; 4. Water guide cavity; 5. Drain hole; 6. Chip breaking mechanism; 7. Water inlet mechanism; 8. Rotating ring; 9. Water inlet pipe; 10. Water inlet groove; 11. Water inlet hole; 12. Mounting bracket; 13. Chip breaking rotating shaft; 14. Water guide fan blade. Detailed implementation manners

[0023] To further illustrate each embodiment, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0024] According to an embodiment of the present invention, a hard tungsten steel milling cutter capable of automatically breaking chips is provided. Embodiment 1:

[0025] As Figures 1-3 shown, a hard tungsten steel milling cutter capable of automatically breaking chips according to an embodiment of the present invention includes a milling cutter bar 1. It is characterized in that a plurality of chip guide grooves 2 are provided at the bottom of the milling cutter bar 1, a hexagonal mounting shaft 3 is provided at the upper end of the milling cutter bar 1, a water guide cavity 4 is provided inside the milling cutter bar 1, a drain hole 5 communicating with the water guide groove is provided at the bottom end of the chip guide groove 2, a chip breaking mechanism 6 is provided inside the drain hole 5, and a water inlet mechanism 7 is provided at the upper end of the outer surface of the milling cutter bar 1.

[0026] During use, the milling cutter bar 1 is installed in a numerical control machine tool through the hexagonal mounting shaft 3. During the process of the milling cutter bar 1 rotating to mill a workpiece, the chips generated are exported through the chip guide grooves 2. At the same time, through the setting of the water inlet mechanism 7, cooling water is introduced into the water guide cavity 4 and discharged through the drain hole 5. At this time, the cold water contacts the chips located inside the chip guide grooves 2, achieving the purpose of quickly cooling the chips to make them brittle. At the same time, with the setting of the chip breaking mechanism 6, the cooled chips are guided, changing their relative position with the chip guide grooves 2, thereby achieving the effect of deflecting the chips. However, at this time, the chips have been cooled by the cooling water to become brittle, and then the chips break when deflecting to achieve the effect of breaking chips. Embodiment 2:

[0027] As Figures 1-3As shown, the drain hole 5 is a tapered hole, and the diameter of the end of the drain hole 5 close to the water guide cavity 4 is larger than the diameter of the end far from the water guide cavity 4. The water inlet mechanism 7 includes a rotating ring 8 sleeved on the upper end of the milling cutter bar 1. One end of the rotating ring 8 is provided with a water inlet pipe 9, and a water inlet groove 10 is formed inside the rotating ring 8. A water inlet hole 11 is provided at a position corresponding to the rotating ring 8 on the milling cutter bar 1, and the rotating ring 8 and the milling cutter bar 1 are rotatably connected through a bearing. The chip breaking mechanism 6 includes a mounting frame 12 located inside the drain hole 5, and a chip breaking rotating shaft 13 is provided in the middle of the mounting frame 12. One end of the chip breaking rotating shaft 13 protrudes from the drain hole 5, and a water guide fan blade 14 is provided at the end of the chip breaking rotating shaft 13 close to the water guide cavity 4.

[0028] During use, by connecting a water pump to the water inlet pipe 9, the cooling water is then introduced into the interior of the water guide cavity 4 through the cooperation of the water inlet pipe 9, the water inlet groove 10 and the water inlet hole 11. Then, the water flows out through the drain hole 5, so that during the process of milling the workpiece by the milling cutter bar 1, the surface of the milling cutter bar 1 can be cooled to prevent the temperature of the milling cutter bar 1 from being difficult to decrease, which may cause stress changes in the milling cutter bar 1. And by the discharge of the cooling water, the waste chips generated during the milling process can be cooled, making the waste chips quickly cooled and brittle. When the cold air water is discharged through the drain hole 5, the water guide fan blade 14 causes the chip breaking rotating shaft 13 to rotate in the middle of the mounting frame 12. Since one end of the chip breaking rotating shaft 13 protrudes from the drain hole 5, the chip breaking rotating shaft 13 guides the waste chips entering the waste chip guide groove 2, changing their moving direction. At this time, the waste chips become brittle due to rapid cooling, and are thus prone to breakage when the moving direction changes, thereby achieving the effect of preventing the waste chips from winding around the surface of the milling cutter bar 1 and affecting heat dissipation.

[0029] To facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0030] In actual application, the milling cutter bar 1 is installed in a numerical control machine tool through the hexagonal mounting shaft 3. During the process of the milling cutter bar 1 rotating to mill the workpiece, the waste chips generated are exported through the waste chip guide groove 2. At the same time, through the setting of the water inlet mechanism 7, cooling water is introduced into the interior of the water guide cavity 4 and discharged through the drain hole 5. At this time, the cold air water contacts the waste chips located inside the waste chip guide groove 2, achieving the purpose of quickly cooling the waste chips to make them brittle. At the same time, the setting of the chip breaking mechanism 6 guides the cooled waste chips, changing their relative position with the waste chip guide groove 2, thereby achieving the effect of deflecting the waste chips. However, at this time, the waste chips have been cooled by the cooling water to become brittle, so that the waste chips break when deflected to achieve the chip breaking effect. When in use, the water pump is connected to the water inlet pipe 9, and then the cooling water is made to enter the interior of the water guide cavity 4 through the cooperation of the water inlet pipe 9, the water inlet groove 10 and the water inlet hole 11. Then the water flow is discharged through the drain hole 5, thereby cooling the surface of the milling cutter bar 1 during the process of milling the workpiece by the milling cutter bar 1 to prevent the temperature of the milling cutter bar 1 from being difficult to reduce, resulting in the stress change of the milling cutter bar 1. And through the discharge of the cooling water, the waste chips generated during the milling process are cooled, making the waste chips quickly cooled and become brittle. When the cold air water is discharged through the drain hole 5, the chip breaking rotating shaft 13 rotates in the middle of the mounting frame 12 through the setting of the guide water fan blade 14. And because one end of the chip breaking rotating shaft 13 protrudes from the drain hole 5, the chip breaking rotating shaft 13 guides the waste chips entering the interior of the waste chip guide groove 2, changing their moving direction. And at this time, the waste chips become brittle due to rapid cooling, so that they are prone to break when the moving direction changes, thus achieving the effect of preventing the waste chips from winding around the surface of the milling cutter bar 1 and affecting heat dissipation.

[0031] In summary, by means of the above technical solution of the present invention, the milling cutter bar is installed in a numerical control machine tool through the hexagonal mounting shaft. During the process of the milling cutter bar rotating to mill the workpiece, the waste chips generated are exported through the waste chip guide groove. At the same time, through the setting of the water inlet mechanism, cooling water is introduced into the interior of the water guide cavity and discharged through the drain hole. At this time, the cold air water contacts the waste chips located inside the waste chip guide groove, achieving the purpose of quickly cooling the waste chips to make them brittle. At the same time, the setting of the chip breaking mechanism guides the cooled waste chips, changing their relative position with the waste chip guide groove, thereby achieving the effect of deflecting the waste chips. However, at this time, the waste chips have been cooled by the cooling water to become brittle, so that the waste chips break when deflected to achieve the chip breaking effect.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hard tungsten steel milling cutter capable of automatic chip breaking, comprising a milling cutter bar (1), characterized in that: The bottom of the milling cutter rod (1) is provided with a plurality of waste chip guide grooves (2), the upper end of the milling cutter rod (1) is provided with a hexagonal mounting shaft (3), the interior of the milling cutter rod (1) is provided with a water guide cavity (4), the bottom end of the waste chip guide groove (2) is provided with a drainage hole (5) connected to the water guide groove, the interior of the drainage hole (5) is provided with a chip breaking mechanism (6), and the upper end of the outer surface of the milling cutter rod (1) is provided with a water inlet mechanism (7).

2. A hard tungsten steel milling cutter capable of automatic chip breaking according to claim 1, characterized in that: The drainage hole (5) is a conical hole, and the diameter of the end of the drainage hole (5) close to the water guiding cavity (4) is larger than the diameter of the end away from the water guiding cavity (4).

3. A hard tungsten steel milling cutter capable of automatic chip breaking according to claim 2, characterized in that: The water inlet mechanism (7) comprises a rotating ring (8) sleeved on the upper end of the milling cutter rod (1), a water inlet pipe (9) is provided at one end of the rotating ring (8), and a water inlet groove (10) is provided on the inner side of the rotating ring (8).

4. A hard tungsten steel milling cutter capable of automatic chip breaking according to claim 3, characterized in that: A water inlet hole (11) is provided at a position of the milling cutter rod (1) corresponding to the rotating ring (8), and the rotating ring (8) and the milling cutter rod (1) are rotatably connected via a bearing.

5. The hard tungsten steel milling cutter capable of automatic chip breaking according to claim 4, characterized in that: The chip breaking mechanism (6) comprises a mounting frame (12) located inside the drainage hole (5), and a chip breaking shaft (13) is provided in the middle of the mounting frame (12).

6. The hard tungsten steel milling cutter capable of automatic chip breaking according to claim 5, characterized in that: One end of the chip breaking shaft (13) protrudes from the drainage hole (5), and one end of the chip breaking shaft (13) close to the water guiding cavity (4) is provided with a water guiding blade (14).

Images