Eccentric alloy drill bit facilitating chip removal

Abstract

The utility model relates to an eccentric alloy drill bit convenient for chip removal, which relates to the technical field of alloy drill bits, and comprises a drill rod and a tool bit arranged at the end part of the drill rod, a first cutting edge, a second cutting edge and a third cutting edge which are circumferentially and annularly distributed around the central axis a of the tool bit are integrally formed on the tool bit; a first tangent plane is formed on the first cutting edge, a second tangent plane is formed on the second cutting edge, and a third tangent plane is formed on the third cutting edge; the first tangent plane, the second tangent plane and the third tangent plane converge at the end of the tool bit to form a tool nose, and the position of the tool nose deviates from the central axis a of the tool bit. And chip grooves are formed in the first tangent plane, the second tangent plane and the third tangent plane. The drill bit has the advantages that the chip removal resistance is reduced, drilling chips are easily discharged through the chip removal grooves, so that the purpose of efficient chip removal is achieved, the heat dissipation effect of the drill bit is enhanced, and in addition, the drilling performance of the drill bit in all aspects is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of alloy drill bits, and in particular to an eccentric alloy drill bit that facilitates chip removal. Background Art

[0002] At present, alloy drill bits generally refer to drill bits that use carbide as the cutting part. This type of drill bit is more durable than high-speed steel drill bits, can withstand higher temperatures, and performs better when processing materials with higher hardness.

[0003] During the drilling process, the alloy drill bits in the related technology are prone to burning the alloy material due to the repeated force acting on the same force point and force surface. In addition, the alloy drill bits have large chip removal resistance, and the drill chips are not easy to be discharged. The blockage of the drill hole is not conducive to the drilling efficiency. At the same time, it is also easy to cause heat accumulation, the heat dissipation effect of the drill bit is poor, and the service life of the drill bit is short. Utility Model Content

[0004] The present application provides an eccentric alloy drill bit that is convenient for chip removal, which has the effect of effectively suppressing the temperature rise rate of the cutter head during drilling, improving the chip removal efficiency of the cutter head, and extending the service life of the cutter head.

[0005] The present application provides an eccentric alloy drill bit that facilitates chip removal and adopts the following technical solution:

[0006] The present invention comprises a drill rod and a cutter head arranged at the end of the drill rod; the cutter head is integrally formed with a first blade, a second blade, a third blade and a fourth blade which are circumferentially distributed around the central axis a of the cutter head; a first cut surface is formed on the first blade, a second cut surface is formed on the second blade, a third cut surface is formed on the third blade, and a fourth cut surface is formed on the fourth blade; the first cut surface, the second cut surface, the third cut surface and the fourth blade converge at the end of the cutter head to form a cutting tip, and the position of the cutting tip deviates from the central axis a of the cutter head; the first cut surface, the second cut surface, the third cut surface and the fourth cut surface are all provided with a chip groove.

[0007] Preferably, the first section, the second section, the third section and the fourth section are all arc surfaces, and the central angle R of the first section is greater than the central angle R of the third section.

[0008] Preferably, the central angle R of the second section is smaller than the central angle R of the fourth section.

[0009] Preferably, the number of chip grooves on the first and third cut surfaces is smaller than the number of chip grooves on the second and fourth cut surfaces.

[0010] Preferably, the first section, the second section, the third section and the fourth section are all arranged to be inclined along the rotation direction of the cutter head during cutting.

[0011] Preferably, the chip removal grooves on the same section are staggered with the chip removal grooves on the adjacent two side sections.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] Because the tool tip deviates from the center axis a of the cutter head, the cutter head can achieve swing drilling during drilling, significantly reducing the load on the cutter head during drilling and effectively suppressing the temperature rise rate of the cutter head during drilling. This improves drilling efficiency while further extending the cutter head's service life. The chip flutes significantly enhance the chip removal effect of the cutter head, reducing chip removal resistance. Drill chips are easily discharged through the chip flutes, achieving efficient chip removal and enhancing the heat dissipation effect of the cutter head. In addition, all aspects of the cutter head's drilling performance are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0015] Figure 2 yes Figure 1 A top view of

[0016] Figure 3 It is the front view of the local structure of the first section;

[0017] Figure 4 It is the front view of the local structure of the second section;

[0018] Figure 5 It is the front view of the local structure of the third section;

[0019] Figure 6 This is the front view of the local structure of the fourth section.

[0020] Explanation of the accompanying reference numerals: 1. drill rod; 2. cutter head; 20. cutting tip; 21. chip groove; 210. arcuate surface; 211. inclined surface; 3. first cutting edge; 30. first section; 4. second cutting edge; 40. second section; 5. third cutting edge; 50. third section; 6. fourth cutting edge; 60. fourth section; 7. cutting edge. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the accompanying drawings.

[0022] The embodiment of the present application discloses an eccentric alloy drill bit that facilitates chip removal.

[0023] Reference Figure 1 、 Figure 2The eccentric alloy drill bit for easy chip removal includes a drill rod 1 and an alloy cutter head 2 coaxially arranged at the end of the drill rod 1. The cutter head 2 has an outer circumferential wall integrally formed with a first cutting edge 3, a second cutting edge 4, a third cutting edge 5, and a fourth cutting edge 6, which are evenly spaced circumferentially around the center axis a of the cutter head 2.

[0024] like Figures 3 to 6 As shown, a first cut surface 30 is formed on the outer wall of the first blade 3 facing away from the cutter head 2, a second cut surface 40 is formed on the outer wall of the second blade 4 facing away from the cutter head 2, a third cut surface 50 is formed on the outer wall of the third blade 5 facing away from the cutter head 2, and a fourth cut surface 60 is formed on the outer wall of the fourth blade 6 facing away from the cutter head 2. The first cut surface 30, the second cut surface 40, the third cut surface 50, and the fourth cut surface 60 are all arranged obliquely along the direction of rotation of the cutter head 2 during cutting. The first blade 3 and the third blade 5 are arranged oppositely on the front and rear sides of the cutter head 2, and the second blade 4 and the fourth blade 6 are arranged oppositely on the left and right sides of the cutter head 2.

[0025] like Figures 3 to 6 As shown, the first section 30, the second section 40, the third section 50, and the fourth section 60 are all arcuate surfaces. The central angle R of the first section 30 is greater than the central angle R of the third section 50, with the specific difference ranging from 1.5 to 2.5 degrees. The central angle R of the second section 40 is less than the central angle R of the fourth section 60, with the specific difference ranging from 1.5 to 2.5 degrees.

[0026] like Figure 2 、 Figure 3 As shown, the ends of the first section 30 , the second section 40 , the third section 50 and the fourth section 60 converge at the end of the cutter head 2 to form a cutting tip 20 , and the position of the cutting tip 20 deviates from the central axis a of the cutter head 2 .

[0027] like Figures 3 to 6 As shown, a cutting edge 7 is formed at the junction of the end of the first cutting surface 30 and the end of the third cutting surface 50, and a blade tip 20 is formed on one side of the cutting edge 7. The first cutting surface 30, the second cutting surface 40, the third cutting surface 50, and the fourth cutting surface 60 are all provided with a chip groove 21. The chip groove 21 can greatly improve the chip removal efficiency of the cutter head 2 during cutting. The chip grooves 21 are arranged in sequence along the longitudinal extension direction of their respective cutting surfaces. The chip grooves 21 include an integrally formed arcuate surface 210 and an inclined surface 211. The inclined surface 211 is located on the side of the arcuate surface 210 away from the blade tip 20, and the inclined surface 211 is arranged at an angle.

[0028] like Figures 3 to 6As shown, the number of chip flutes 21 on the first and third cut surfaces 30, 50 is less than the number of chip flutes 21 on the second and fourth cut surfaces 40, 60. In this embodiment, there are two chip flutes 21 on the first and third cut surfaces 30, 50, while there are three chip flutes 21 on the second and fourth cut surfaces 40, 60. The chip flutes 21 on the same cut surface are offset from the chip flutes 21 on the adjacent cut surfaces. By offsetting the positions of the chip flutes 21 on adjacent cut surfaces, it is ensured that drill chips can be smoothly discharged from the drill hole along the chip flutes 21 during cutting by the cutter head 2.

[0029] The principle of implementation is as follows: Because the cutting tip 20 deviates from the central axis a of the cutter head 2, the cutter head 2 can achieve a swinging drilling motion during drilling, significantly reducing the load on the cutter head 2 during drilling and effectively suppressing the temperature rise rate of the cutter head 2 during drilling. This improves drilling efficiency while further extending the service life of the cutter head 2. The provision of the chip flute 21 greatly enhances the chip removal effect of the cutter head 2, reducing chip removal resistance. Drill chips are easily discharged through the chip flute 21, achieving efficient chip removal and enhancing the heat dissipation effect of the cutter head 2. In addition, all aspects of the drilling performance of the cutter head 2 are significantly improved.

[0030] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An eccentric alloy drill bit for facilitating chip removal, comprising a drill rod (1) and a cutter head (2) disposed at the end of the drill rod (1); characterized in that: The cutter head (2) is integrally formed with a first blade (3), a second blade (4), a third blade (5) and a fourth blade (6) which are circumferentially arranged around the central axis a of the cutter head (2); a first cut surface (30) is formed on the first blade (3), a second cut surface (40) is formed on the second blade (4), a third cut surface (50) is formed on the third blade (5), and a fourth cut surface (60) is formed on the fourth blade (6); the first cut surface (30), the second cut surface (40), the third cut surface (50) and the fourth blade (6) converge at the end of the cutter head (2) to form a cutting tip (20), and the position of the cutting tip (20) deviates from the central axis a of the cutter head (2); and a chip removal groove (21) is provided on the first cut surface (30), the second cut surface (40), the third cut surface (50) and the fourth cut surface (60).

2. The eccentric alloy drill bit for easy chip removal according to claim 1, characterized in that: The first section (30), the second section (40), the third section (50) and the fourth section (60) are all arcuate surfaces, and the central angle R of the first section (30) is greater than the central angle R of the third section (50).

3. The eccentric alloy drill bit for easy chip removal according to claim 1 or 2, characterized in that: The central angle R of the second section (40) is smaller than the central angle R of the fourth section (60).

4. The eccentric alloy drill bit for easy chip removal according to claim 3, characterized in that: The number of chip grooves (21) on the first section (30) and the third section (50) is smaller than the number of chip grooves (21) on the second section (40) and the fourth section (60).

5. The eccentric alloy drill bit for easy chip removal according to claim 4, characterized in that: The first cut surface (30), the second cut surface (40), the third cut surface (50) and the fourth cut surface (60) are all arranged to be inclined along the rotation direction of the cutter head (2) during cutting.

6. The eccentric alloy drill bit for easy chip removal according to claim 5, characterized in that: The chip removal groove (21) located on the same section is staggered with the chip removal grooves (21) on the adjacent two side sections.

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