Gun drill for deep hole machining

Abstract

The utility model discloses a gun drill for deep hole processing, which relates to the technical field of gun drills, and comprises a cutter bar, a cutter head and a cutter handle which are mutually connected and fixed, the surface of the cutter bar and the surface of the cutter head are jointly provided with a chip groove, and the setting angle of the chip groove is 125-135 degrees. According to the gun drill for deep hole machining, the angle of the chip groove ranges from 125 degrees to 135 degrees, compared with a chip groove of a traditional gun drill, the angle is greatly increased, and the mode of increasing the grooving angle of the chip groove has the advantages that the grooving angle is increased, metal chips are easy to discharge, the working efficiency is high, the cooling effect is good, the service life of a drill bit is prolonged, and the service life of the drill bit is prolonged. And in addition, the cutting edge is provided with the first cutting edge, the second cutting edge and the third cutting edge, so that the more sharp surfaces are, the more metal is drilled during drilling.

Description

Technical Field

[0001] The utility model relates to the technical field of gun drills, in particular to a gun drill for deep hole processing. Background Art

[0002] At present, the existing gun drill has a lot of chip removal during processing, and the existing tool generally has a slotting angle between 116° and 120° (as shown in the attached Figure 3 As shown in the figure), during use, there will be a lot of metal debris that is difficult to discharge. In this way, the iron chips in the gun drill will rub against the inner wall of the metal, thereby generating high temperature. Under the action of high temperature, the gun drill is easy to soften and break, and it will also scratch the inner wall of the drilled hole, which means that the precision cannot be achieved. In order to solve the existing technical problems, we have proposed a gun drill for deep hole processing. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a gun drill for deep hole processing, which solves the problems raised by the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a gun drill for deep hole processing, including a tool rod, a tool head, and a tool handle that are connected and fixed to each other, and the surfaces of the tool rod and the tool head are jointly provided with a chip groove, and the setting angle of the chip groove is 125°~135°.

[0005] Furthermore, the shank, the cutter head and the handle are an integrated structure and are made of tungsten steel.

[0006] Furthermore, the inlet of the chip removal groove extends to the end of the cutter head, and the outlet of the chip removal groove extends in a direction away from the cutter head toward the cutter rod.

[0007] Furthermore, an irregularly shaped blade is provided at the end of the blade head, and a blade locking groove is reserved on the surface of the handle.

[0008] Furthermore, the inside of the tool rod, tool head and tool handle are commonly provided with interconnected cooling water channels.

[0009] Furthermore, a water outlet is reserved at the end of the cutter head, a water inlet is reserved at the end of the handle, and the cooling water channel is connected to the water inlet and the water outlet.

[0010] Furthermore, the water inlet, water outlet and cooling water channel are all arc-shaped oblong hole structures.

[0011] Furthermore, the blade is provided with a first cutting edge, a second cutting edge and a third cutting edge, the first cutting edge and the second cutting edge are provided on the same surface, and the third cutting edge is a single surface.

[0012] The utility model provides a gun drill for deep hole processing. Compared with the existing technology, it has the following advantages:

[0013] The gun drill for deep hole processing is provided with a chip groove with an angle between 125° and 135°. Compared with the chip groove of a traditional gun drill, the angle is greatly increased. The advantage of increasing the slotting angle of the chip groove is that the increased slotting angle makes it easier to discharge metal debris, which increases work efficiency, has a good cooling effect, and extends the service life of the drill bit. In addition, the blade is provided with a first cutting edge, a second cutting edge, and a third cutting edge. Therefore, when drilling, the more sharp surfaces there are, the faster the metal is drilled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the chip removal groove angle structure in the utility model;

[0016] Figure 3 This is a schematic diagram of the angle structure of the chip removal groove of a gun drill in the prior art.

[0017] Figure 4 This is a schematic diagram of the cutting edge design of the utility model.

[0018] In the figure: 1. Tool bar; 2. Tool head; 21. Chip groove; 22. Blade; 3. Tool handle; 31. Tool lock groove; 4. Water inlet; 5. Water outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1 、 2The utility model provides a technical solution: a gun drill for deep hole processing, which consists of a tool rod 1, a tool head 2, and a tool handle 3. Among them, the tool rod 1, the tool head 2, and the tool handle 3 are formed by an integrated molding process and are made of tungsten steel. The gun drill composed of the tool rod 1, the tool head 2, and the tool handle 3 has a variety of sizes. The gun drill of the corresponding size can be used according to the deep hole diameter that needs to be drilled. The surfaces of the tool rod 1 and the tool head 2 are jointly provided with a chip groove 21. The end of the tool head 2 is provided with an irregular-shaped blade 22. The feeding port of the chip groove 21 is provided with a It extends to the end of the cutter head 2, and the discharge port of the chip groove 21 extends toward the cutter bar 1 away from the cutter head 2. The setting angle of the chip groove 21 is 125° to 135°. Compared with the angle of the chip groove of the gun drill in the prior art, this angle is significantly increased (the angle range of the prior art is generally 116° to 125°). The increased slotting angle makes it easier to discharge metal debris, improves work efficiency, improves cooling effect, and extends the service life of the drill bit. A locking groove 31 is reserved on the surface of the shank 3 to facilitate the installation of the gun drill.

[0021] The blade 22 is provided with a first cutting edge 221, a second cutting edge 222 and a third cutting edge 223. The first cutting edge 221 and the second cutting edge 222 are arranged on the same surface, and the third cutting edge 223 is a single surface.

[0022] In addition, in order to cool the gun drill and assist in discharging metal debris, a connected cooling water channel is commonly provided inside the tool rod 1, the tool head 2, and the tool handle 3. A water outlet 5 is reserved at the end of the tool head 2, and a water inlet 4 is reserved at the end of the tool handle 3. The cooling water channel is connected to the water inlet 4 and the water outlet 5. The water inlet 4, the water outlet 5 and the cooling water channel are all arc-shaped oblong hole structures. The cooling water channel can be injected with cooling medium. On the one hand, this structure can cool the gun drill that is rotating at high speed. On the other hand, after the cooling medium is discharged from the water outlet 5, the cooling medium will give the metal debris an impact thrust, thereby assisting in discharging the metal debris from the chip discharge groove 21.

Claims

1. A gun drill for deep hole processing, comprising a tool rod (1), a tool head (2), and a tool handle (3) connected and fixed to each other, characterized in that: The surfaces of the tool rod (1) and the tool head (2) are both provided with a chip removal groove (21), and the setting angle of the chip removal groove (21) is 125° to 135°.

2. The gun drill for deep hole machining according to claim 1, characterized in that: The knife bar (1), knife head (2), and knife handle (3) are an integrated structure and are made of tungsten steel.

3. The gun drill for deep hole machining according to claim 1, characterized in that: The inlet of the chip removal groove (21) extends to the end of the cutter head (2), and the outlet of the chip removal groove (21) extends in a direction away from the cutter head (2) toward the cutter rod (1).

4. The gun drill for deep hole machining according to claim 1, characterized in that: An irregularly shaped blade (22) is provided at the end of the blade head (2), and a blade locking groove (31) is reserved on the surface of the blade handle (3).

5. The gun drill for deep hole machining according to claim 1, characterized in that: The tool rod (1), tool head (2), and tool handle (3) are collectively provided with interconnected cooling water channels inside.

6. The gun drill for deep hole machining according to claim 5, characterized in that: A water outlet (5) is reserved at the end of the cutter head (2), a water inlet (4) is reserved at the end of the cutter handle (3), and the cooling water channel is connected to the water inlet (4) and the water outlet (5).

7. The gun drill for deep hole machining according to claim 6, characterized in that: The water inlet (4), the water outlet (5) and the cooling water channel are all arc-shaped oblong hole structures.

8. The gun drill for deep hole machining according to claim 4, characterized in that: The blade (22) is provided with a first cutting edge (221), a second cutting edge (222) and a third cutting edge (223); the first cutting edge (221) and the second cutting edge (222) are provided on the same surface, and the third cutting edge (223) is a single surface.

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