CN212469906U - Left-handed cutting drill bit - Google Patents

Abstract

The utility model discloses a drill bit is cut on left-handed left side, including handle of a knife and drill bit part, the configuration of drill bit part is in the one end of handle of a knife, and main cutting face, vice cutting face, back knife face, vice back knife face and cooling surface have been seted up on the top of drill bit part. This drill bit is cut on a left hand side, there is great drop just with the back knife face in the main cutting face, guarantee drilling effect, the drilling of the supplementary main cutting edge on drill bit part top, there is the angular deviation of certain degree between the two vice cutting edge and the main cutting edge, avoid the atress too concentrated, guarantee the life of whole drill bit, the cooling surface is used for certain heat dissipation, the separation from passageway of sweeps can be regarded as to vice cutting face, drill bit drilling effect is good on a left hand side of whole levogyration, the radiating effect is good simultaneously, stress concentration is avoided with the setting of main cutting edge to vice cutting edge, guarantee the life of whole drill bit.

Description

Left-handed cutting drill bit

Technical Field

The utility model relates to a left-handed drill bit technical field specifically is a left-handed cutting drill bit.

Background

The left-hand milling cutter is generally a cutter selected under the requirement of high-precision machining, so the material requirement and the production process of the left-hand milling cutter are particularly detailed. The left-handed drill bit is commonly used for compact machining equipment, and the left-handed drill bit is used for reasonably drilling materials. But current levogyration left side is cut the drill bit and then can lead to the drill bit top temperature to be difficult to scatter because of setting up the cooling surface, influences the whole life of drill bit, and current levogyration left side is cut the drill bit main cutting edge and is rectangular form simultaneously, and the condition that stress collapses and crumbles easily appears, and drilling effect is not good.

Disclosure of Invention

An object of the utility model is to provide a drill bit is cut on a left side of levogyration, it is effectual to possess drilling, can reduce the good advantage of drill bit stress concentration simultaneous heat dissipation, can solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a left-handed cutting drill bit, includes handle of a knife and drill bit part, drill bit part disposes the one end at the handle of a knife, and main cutting face, vice cutting face, back knife face, vice back knife face and cooling surface have been seted up on the top of drill bit part, one side edge and the vice cutting face of main cutting face are connected, and the other side edge and the vice back knife face of main cutting face are connected, and main cutting face still is connected with back knife face, one side edge and the vice cutting face of back knife face are connected, and the other side edge and the vice back knife face of back knife face are connected, and the tail end of cooling surface is connected to vice back knife face, main cutting face and vice cutting face are still.

Preferably, a main cutting edge is arranged at the joint of the main cutting surface and the rear cutter surface.

Preferably, an auxiliary cutting edge is arranged at the joint of the auxiliary cutting surface and the rear cutter surface, and one end of the auxiliary cutting edge is connected with the main cutting edge.

Preferably, the cooling surface and the secondary cutting surface are both connected with the tool shank.

Preferably, the relief surface and the minor relief surface are both symmetrical about the central axis of the shank.

Preferably, the main cutting surface is provided with a groove.

Compared with the prior art, the beneficial effects of the utility model are as follows:

this drill bit is cut on a left hand side, the one end at the handle of a knife is disposed to the drill bit part, main cutting face has been seted up on the top of drill bit part, vice cutting face, the back knife face, vice back knife face and cooling surface, there is great drop just with the back knife face in main cutting face, guarantee drilling effect, the supplementary main cutting edge drilling of the vice cutting edge on drill bit part top, there is the angular deviation of certain degree between vice cutting edge and the main cutting edge between the two, avoid the atress too concentrated, guarantee the life of whole drill bit, the cooling surface is used for certain heat dissipation, vice cutting face can regard as the separation channel of sweeps, whole left hand side is cut drill bit drilling effectual, the radiating effect is good simultaneously, stress concentration is avoided with the setting of main cutting edge to vice cutting edge, guarantee the life of.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of a portion of the drill bit of the present invention;

FIG. 3 is a schematic diagram of the overall structure of the present invention;

fig. 4 is a schematic top view of the overall structure of the present invention;

fig. 5 is a schematic side view of the overall structure of the present invention.

In the figure: 1. a knife handle; 2. a drill bit portion; 21. a main cutting face; 22. a secondary cutting face; 23. a flank face; 24. a secondary relief surface; 25. cooling the dough; 26. a main blade; 27. and a secondary blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a left-handed cutting drill comprises a holder 1 and a drill part 2, wherein the drill part 2 can perform left-handed drilling, the drill part 2 is disposed at one end of the holder 1, the top end of the drill part 2 is provided with a main cutting surface 21, an auxiliary cutting surface 22, a rear cutter surface 23, an auxiliary rear cutter surface 24 and a cooling surface 25, the main cutting surface 21 is provided with a groove, so that a large drop exists between the main cutting surface 21 and the rear cutter surface 23 to ensure the drilling effect, one side edge of the main cutting surface 21 is connected with the auxiliary cutting surface 22, the tail end of the auxiliary cutting surface 22 is connected with the holder 1, the other side edge of the main cutting surface 21 is connected with the auxiliary rear cutter surface 24, the main cutting surface 21 is further connected with the rear cutter surface 23, a main cutting edge 26 is disposed at the connection between the main cutting surface 21 and the rear cutter surface 23, the main cutting edge 26, the auxiliary cutting face 22 and the rear cutter face 23 are connected through an auxiliary cutting edge 27, one end of the auxiliary cutting edge 27 is connected with the main cutting edge 26, the auxiliary cutting edge 27 assists the main cutting edge 26 in drilling, a certain degree of angle deviation exists between the auxiliary cutting edge 27 and the main cutting edge 26, stress is prevented from being excessively concentrated, the service life of the whole drill bit is guaranteed, the other side edge of the rear cutter face 23 is connected with the auxiliary rear cutter face 24, the rear cutter face 23 and the auxiliary rear cutter face 24 are symmetrical about the central axis of the tool shank 1, the whole drilling effect is guaranteed, the auxiliary rear cutter face 24 is connected with the tail end of the cooling face 25, the cooling face 25 is further connected with the main cutting face 21 and the auxiliary cutting face 22, the cooling face 25 and the auxiliary cutting face 22 are connected with the tool shank 1, the cooling face 25 is used for certain heat dissipation, and.

The left-handed cutting drill comprises a cutter handle 1 and a drill part 2, wherein the drill part 2 can perform left-handed drilling, the drill part 2 is arranged at one end of the cutter handle 1, the top end of the drill part 2 is provided with a main cutting surface 21, an auxiliary cutting surface 22, a rear cutter surface 23, an auxiliary rear cutter surface 24 and a cooling surface 25, the main cutting surface 21 is provided with a groove, so that a large fall exists between the main cutting surface 21 and the rear cutter surface 23 to ensure the drilling effect, the joint of the main cutting surface 21 and the rear cutter surface 23 is provided with a main blade 26, the main blade 26 is used as a main drilling member, the joint of the auxiliary cutting surface 22 and the rear cutter surface 23 is provided with an auxiliary blade 27, one end of the auxiliary blade 27 is connected with the main blade 26, the auxiliary blade 27 assists the main blade 26 in drilling, a certain degree of angle deviation exists between the auxiliary blade 27 and the main blade 26 to avoid over-concentrated stress, the service life, the cooling surface 25 is further connected with the main cutting surface 21 and the auxiliary cutting surface 22, the cooling surface 25 and the auxiliary cutting surface 22 are both connected with the cutter handle 1, the cooling surface 25 is used for certain heat dissipation, the auxiliary cutting surface 22 can be used as a separation channel of scraps, the drilling effect of the whole left-handed cutting drill is good, the heat dissipation effect is good, stress concentration is avoided due to the arrangement of the auxiliary cutting edge 27 and the main cutting edge 26, and the service life of the whole drill is guaranteed.

In summary, the following steps: this drill bit is cut to left-handed rotation, drill bit part 2 disposes the one end at handle of a knife 1, main cutting face 21 has been seted up on the top of drill bit part 2, vice cutting face 22, back knife face 23, vice back knife face 24 and cooling surface 25, main cutting face 21 just has great drop with back knife face 23, guarantee drilling effect, the supplementary main cutting edge 26 drilling of vice cutting edge 27 on drill bit part 2 top, there is certain degree angle skew between vice cutting edge 27 and the main cutting edge 26, avoid the atress too concentrated, guarantee the life of whole drill bit, cooling surface 25 is used for certain heat dissipation, vice cutting face 22 can regard as the separation passageway of sweeps, whole left-handed rotation drill bit drilling effect is good, the radiating effect is good simultaneously, stress concentration is avoided in the setting of vice cutting edge 27 and main cutting edge 26, guarantee the life of whole drill bit.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a left-handed cutting drill bit, includes handle of a knife (1) and drill bit part (2), its characterized in that: the drill bit part (2) is arranged at one end of the cutter handle (1), a main cutting face (21), an auxiliary cutting face (22), a rear cutter face (23), an auxiliary rear cutter face (24) and a cooling face (25) are arranged at the top end of the drill bit part (2), one side edge of the main cutting face (21) is connected with the auxiliary cutting face (22), the other side edge of the main cutting face (21) is connected with the auxiliary rear cutter face (24), the main cutting face (21) is further connected with the rear cutter face (23), one side edge of the rear cutter face (23) is connected with the auxiliary cutting face (22), the other side edge of the rear cutter face (23) is connected with the auxiliary rear cutter face (24), the auxiliary rear cutter face (24) is connected with the tail end of the cooling face (25), and the cooling face (25) is further connected with the main cutting face (21) and the auxiliary cutting face (22).

2. A left-handed cutting bit according to claim 1, wherein: the main cutting edge (26) is arranged at the joint of the main cutting surface (21) and the rear cutter surface (23).

3. A left-handed cutting bit according to claim 1, wherein: an auxiliary cutting edge (27) is arranged at the joint of the auxiliary cutting surface (22) and the rear cutter surface (23), and one end of the auxiliary cutting edge (27) is connected with the main cutting edge (26).

4. A left-handed cutting bit according to claim 1, wherein: the cooling surface (25) and the auxiliary cutting surface (22) are both connected with the cutter handle (1).

5. A left-handed cutting bit according to claim 1, wherein: the flank surface (23) and the auxiliary flank surface (24) are symmetrical about the central axis of the tool shank (1).

6. A left-handed cutting bit according to claim 1, wherein: the main cutting surface (21) is provided with a groove.

Images