Split type high-speed drill bit

Abstract

The utility model discloses a split type high-speed drill bit, which comprises a drill rod handle part, the first spiral chip groove is formed in the front end of the drill rod handle part, a first spiral cutting edge is formed in the first spiral chip groove, a plurality of inner grooves are formed in the first spiral cutting edge at equal intervals, and the inner grooves axially penetrate through the first spiral cutting edge; the conical head part is arranged at the front end of the first spiral cutting edge; the tip drill rod extends to the front end of the conical head part, the front end of the tip drill rod is provided with a conical tip, the rear side of the tip drill rod is provided with a second spiral chip groove extending to the conical head part, and the pitch of the second spiral chip groove is different from that of the first spiral chip groove. The center drill rod is matched with the second spiral chip groove to achieve positioning and preliminary drilling, the shaft diameter of the drill rod handle at the rear end is large, further machining and reaming are achieved through the first spiral cutting edge, the screw pitch is small, high-speed drilling is achieved, and durability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and in particular relates to a split high-speed drill bit. Background Art

[0002] A drill bit is a tool used to drill through holes or blind holes in solid materials, and can also expand existing holes. Currently, most drill bits are twist drill bits with a single specification. When drilling, the spiral blade is used to drill, and the holes drilled are relatively rough. As the drilling depth continues, the drill blade is easily worn, the drilling speed and efficiency decrease, and the durability becomes lower.

[0003] Therefore, a drill bit that can improve the spiral blade of the drill bit while maintaining its high-speed characteristics, is not easy to wear, and has efficient and stable drilling needs to be studied urgently. Utility Model Content

[0004] In view of this, the technical problem to be solved by the utility model is to provide a split high-speed drill bit, which is used to avoid the trouble that the drill bit is easily worn during feeding and drilling, and the speed and efficiency decrease as the drilling goes deeper.

[0005] In order to solve the above technical problems, the utility model discloses a split high-speed drill bit, comprising:

[0006] Drill pipe shank;

[0007] A first spiral chip removal groove is provided at the front end of the drill rod shank, the first spiral chip removal groove forms a first spiral cutting edge, the first spiral cutting edge is provided with a plurality of inner grooves spaced equidistantly, and the inner grooves axially penetrate the first spiral cutting edge;

[0008] A conical head portion disposed at the front end of the first spiral cutting edge;

[0009] The top drill rod extends from the front end of the cone head, the front end of the top drill rod has a conical top, and the rear side has a second spiral chip groove extending to the cone head, and the pitch of the second spiral chip groove is different from the pitch of the first spiral chip groove.

[0010] According to an embodiment of the utility model, the side walls at the front and rear ends of the inner groove are outwardly expanded.

[0011] According to an embodiment of the present invention, the pitch of the second spiral chip groove is greater than the pitch of the first spiral chip groove.

[0012] According to one embodiment of the utility model, the depth of the inner groove is 1.5-2 mm.

[0013] According to an embodiment of the utility model, the cone head portion includes a rear axis portion, a middle axis portion, and a front axis portion; the middle axis portion and the front axis portion have a taper, and the taper of the front axis portion is greater than the taper of the middle axis portion.

[0014] Compared with the prior art, the utility model can obtain the following technical effects:

[0015] The top drill rod is matched with the second spiral chip groove to realize the initial drilling. The shank of the drill rod at the rear end has a larger shaft diameter, and further processing and expansion of the hole is realized through its first spiral cutting edge. The pitch is small, so high-speed drilling is realized and the durability is high.

[0016] Of course, any product implementing the present utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of a split high-speed drill bit according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A partial enlarged view of .

[0020] Figure ID

[0021] The drill rod shank 10 , the first spiral chip removal groove 21 , the first spiral cutting edge 22 , the inner groove 23 , the cone head 30 , the top drill rod 40 , the conical top 41 , and the second spiral chip removal groove 42 . DETAILED DESCRIPTION

[0022] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a split high-speed drill bit according to an embodiment of the utility model; Figure 2 yes Figure 1 A partial enlarged view of .

[0024] As shown in the figure, a split high-speed drill bit includes: a drill rod shank 10; a first spiral chip groove 21 arranged at the front end of the drill rod shank 10, the first spiral chip groove 21 forms a first spiral cutting edge 22, the first spiral cutting edge 22 is provided with a plurality of equally spaced inner grooves 23, the inner grooves 23 axially penetrate the first spiral cutting edge 22; a cone head 30 arranged at the front end of the first spiral cutting edge 22; a top drill rod 40 extending from the front end of the cone head 30, the top drill rod 40 has a conical top 41 at the front end, and has a second spiral chip groove 42 extending to the cone head 30 at the rear side, and the pitch of the second spiral chip groove 42 is different from the pitch of the first spiral chip groove 21.

[0025] In one embodiment of the utility model, the drill rod shank 10 is a round drill shank, and a first spiral chip groove 21 is processed at the front end, and a corresponding first spiral cutting edge 22 is formed. At the same time, a plurality of inner grooves 23 are arranged on the first spiral cutting edge 22 to separate the raised tooth blocks, thereby accelerating drilling, improving the accuracy of the hole opening, and reducing roughness.

[0026] The cone head 30 extends from the front end of the drill rod shank 10, and its axial diameter is reduced to form a top drill rod 40. The top drill rod 40 with a smaller axial diameter is more efficient in drilling and has good positioning performance, and forms a split design with the rear end drill rod shank 10. Specifically, the front end of the top drill rod 40 uses a conical top 41 for positioning drilling, and the second spiral chip removal groove 42 on the rear side realizes deep drilling and chip removal. Finally, after reaching a certain depth, the cone head 30 transitions to the first spiral cutting edge 22, and the drilling is efficient and durable.

[0027] In addition, the utility model sets the pitch of the second spiral chip removal groove 42 and the pitch of the first spiral chip removal groove 21 to be different, so as to adapt to the drilling of rods with different shaft diameters. Preferably, the pitch of the second spiral chip removal groove 42 is greater than the pitch of the first spiral chip removal groove 21, the rear end pitch is smaller, and the hole roughness is lower.

[0028] It is worth mentioning that the side walls at the front and rear ends of the inner groove 23 are outwardly expanded, which makes it difficult for debris to accumulate and allows the drill bit to feed more smoothly.

[0029] Furthermore, the inner groove 23 has a depth of 1.5-2 mm, and the opening is efficient, durable, and not prone to wear.

[0030] In addition, the cone head portion 30 includes a rear axis portion, a middle axis portion, and a front axis portion; the middle axis portion and the front axis portion have a taper, and the taper of the front axis portion is greater than that of the middle axis portion, which facilitates the transition between the two sections of the drill rod shank 10 and the top drill rod 40.

[0031] In summary, the utility model realizes positioning and preliminary drilling through the top drill rod 40 and the second spiral chip groove 42. The axial diameter of the drill rod shank 10 at the rear end is larger, and further processing and expansion of the hole is realized through its first spiral cutting edge 22. In addition, its pitch is small, so high-speed drilling is realized and durability is high.

[0032] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A split high-speed drill bit, characterized in that: include: Drill pipe shank; A first spiral chip removal groove is provided at the front end of the drill rod shank, wherein the first spiral chip removal groove forms a first spiral cutting edge, and the first spiral cutting edge is provided with a plurality of inner grooves spaced at equal intervals, and the inner grooves axially penetrate the first spiral cutting edge; A conical head portion disposed at the front end of the first spiral cutting edge; A top drill rod extends from the front end of the cone head, the front end of the top drill rod has a conical top, and the rear side has a second spiral chip groove extending to the cone head, and the pitch of the second spiral chip groove is different from the pitch of the first spiral chip groove.

2. The split high-speed drill according to claim 1, characterized in that: The side walls at the front and rear ends of the inner groove are outwardly expanded.

3. The split high-speed drill according to claim 1, characterized in that: The pitch of the second spiral chip flute is greater than the pitch of the first spiral chip flute.

4. The split high-speed drill according to claim 1, characterized in that: The inner groove has a depth of 1.5-2 mm.

5. The split high-speed drill according to claim 1, characterized in that: The cone head portion includes a rear axis portion, a middle axis portion, and a front axis portion; the middle axis portion and the front axis portion have tapers, and the taper of the front axis portion is greater than the taper of the middle axis portion.

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