High-speed steel trepanning abrasive drill for machine tool

Abstract

The utility model discloses a high-speed steel trepanning abrasive drill for a machine tool, which comprises a drill bit body, a drilling part is arranged at one end of the drill bit body, an auxiliary drilling rod is integrally arranged at the tail end of the drilling part, a tooth part is arranged on the outer wall of the auxiliary drilling rod, and the auxiliary drilling rod and the tooth part on the outer wall of the auxiliary drilling rod jointly form a self-tapping screw structure. The auxiliary drilling rod of a self-tapping screw structure is arranged at the bottom of the drill bit body, and a self-tapping screw is more easily tapped into a workpiece, so that the auxiliary drilling rod is firstly tapped into high-speed steel, a self-tapping hole is formed in the high-speed steel, and then along with continuous drilling of the drill bit, the drilling part drills and processes the self-tapping hole again; according to the drill bit, the L-shaped cooling channel and the cooling channel are formed in the drilling part and the auxiliary drilling rod, and the drilling part and the auxiliary drilling rod are cooled by cooling liquid in the trepanning and drilling process, so that the temperature of the drilling part and the temperature of the auxiliary drilling rod are not too high, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding drills, in particular to a high-speed steel hole-opening grinding drill for machine tools. Background Technique

[0002] During the drilling process, the drill bit is the main tool for breaking rocks, and the wellbore is formed by the drill bit breaking rocks. The quality of a wellbore formed and the time taken are related not only to the characteristics of the rocks in the formation being drilled and the performance of the drill bit itself, but more importantly to the degree of mutual matching between the drill bit and the formation. The rational selection of the drill bit plays an important role in improving the drilling speed and reducing the comprehensive drilling cost. The drill bit is one of the important tools for oil drilling work. Whether the drill bit is suitable for the rock properties and its quality plays a very important role in the selection of drilling techniques, especially having a huge impact on drilling quality, drilling speed, and drilling cost. The PDC drill bit is a rock-breaking tool widely used in the current oil and gas exploration and development industry, which effectively improves the mechanical drilling tool and shortens the drilling cycle. And the hole-opening drill bit, as the name implies, is a drill bit for opening holes in workpieces.

[0003] For the existing high-speed steel drill bits for hole opening, due to the high hardness of high-speed steel, the drilling speed of the drill bit for hole opening is slow, and the wear degree of the drill bit is large, resulting in a short service life of the drill bit. Content of the Utility Model

[0004] In view of the problems existing in a high-speed steel hole-opening grinding drill for machine tools, the present utility model is proposed.

[0005] Therefore, the purpose of the present utility model is to provide a high-speed steel hole-opening grinding drill for machine tools, which solves the problems that for the existing high-speed steel drill bits for hole opening, due to the high hardness of high-speed steel, the drilling speed of the drill bit for hole opening is slow, and the wear degree of the drill bit is large, resulting in a short service life of the drill bit.

[0006] To solve the above technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

[0007] A high-speed steel hole-opening grinding drill for machine tools includes a drill bit body. One end of the drill bit body is provided with a drilling part, and an auxiliary drilling rod is integrally provided at the end of the drilling part. Teeth are provided on the outer wall of the auxiliary drilling rod.

[0008] As a preferred scheme of a high-speed steel hole-opening grinding drill for machine tools according to the present utility model, among them: the auxiliary drilling rod and the teeth on its outer wall together form a self-tapping screw structure.

[0009] As a preferred solution of a high-speed steel hole-opening grinding drill for machine tools according to the present utility model, wherein: a rotary joint is rotatably connected to the outer wall of the drill bit body, and the rotary joint is provided with an interface for docking a cooling pipeline.

[0010] As a preferred solution of a high-speed steel hole-opening grinding drill for machine tools according to the present utility model, wherein: an L-shaped cooling channel is provided on the drill bit body, and a cooling channel is provided on the auxiliary drilling rod, and the L-shaped cooling channel is communicated with the cooling channel.

[0011] As a preferred solution of a high-speed steel hole-opening grinding drill for machine tools according to the present utility model, wherein: a first through hole is provided on the drilling part, and a second through hole is provided on the auxiliary drilling rod.

[0012] As a preferred solution of a high-speed steel hole-opening grinding drill for machine tools according to the present utility model, wherein: the first through hole is communicated with the L-shaped cooling channel, and the second through hole is communicated with the cooling channel.

[0013] Compared with the prior art:

[0014] 1. By providing an auxiliary drilling rod with a self-tapping screw structure at the bottom of the drill bit body, the self-tapping screw is more easily drilled into the workpiece. Therefore, the auxiliary drilling rod first drills into the high-speed steel, making the high-speed steel have a "self-tapping hole". Then, as the drill bit continues to drill, the drilling part re-drills the "self-tapping hole", and the drilling part 11 can more easily complete the drilling of the high-speed steel, thereby improving the hole-opening efficiency.

[0015] 2. By providing an L-shaped cooling channel and a cooling channel on the drilling part and the auxiliary drilling rod, during the hole-opening drilling process, the coolant cools the drilling part and the auxiliary drilling rod, so that the temperatures of the drilling part and the auxiliary drilling rod will not be too high, thereby improving the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram provided by Embodiment 1 of the present utility model;

[0017] Figure 2 is a schematic structural diagram provided by Embodiment 2 of the present utility model;

[0018] Figure 3 is a schematic structural diagram provided by Embodiment 3 of the present utility model;

[0019] Figure 4 is provided by Embodiment 3 of the present utility model Figure 3 enlarged view at A in;

[0020] Figure 5 is provided by Embodiment 3 of the present utility model Figure 3 enlarged view at B in.

[0021] In the figure: drill bit body 1, drilling part 11, L-shaped cooling channel 12, first through hole 13, auxiliary drilling rod 2, tooth part 21, cooling channel 22, second through hole 23, rotary joint 3, interface 31. Specific embodiments

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the drawings. Embodiment 1

[0023] The present utility model provides a high-speed steel hole-opening grinding drill for machine tools. Please refer to Figure 1 , which includes a drill bit body 1. One end of the drill bit body 1 is provided with a drilling part 11. An auxiliary drilling rod 2 is integrally provided at the end of the drilling part 11. A tooth part 21 is provided on the outer wall of the auxiliary drilling rod 2.

[0024] The auxiliary drilling rod 2 and the tooth part 21 on its outer wall together form a self-tapping screw structure. As we know, self-tapping screws are easier to penetrate into workpieces. Therefore, the auxiliary drilling rod 2 first penetrates into the high-speed steel, making the high-speed steel have a "self-tapping hole". Then, as the drill bit continues to drill, the drilling part 11 re-drills the "self-tapping hole", and the drilling part 11 can more easily complete the drilling of the high-speed steel.

[0025] During specific use, the auxiliary drilling rod 2 and the tooth part 21 on its outer wall together form a self-tapping screw structure. Self-tapping screws are easier to penetrate into workpieces. Therefore, the auxiliary drilling rod 2 first penetrates into the high-speed steel, making the high-speed steel have a "self-tapping hole". Then, as the drill bit continues to drill, the drilling part 11 re-drills the "self-tapping hole", and the drilling part 11 can more easily complete the drilling of the high-speed steel. Embodiment 2

[0026] Referring to the attached Figure 2 , different from Embodiment 1: A rotary joint 3 is rotatably connected to the outer wall of the drill bit body 1. The rotary joint 3 has an interface 31, and the interface 31 is used to connect to a cooling pipeline;

[0027] An L-shaped cooling channel 12 is provided on the drill bit body 1. A cooling channel 22 is provided on the auxiliary drilling rod 2. The L-shaped cooling channel 12 and the cooling channel 22 are connected. At this time, the interface 31 is connected to the coolant pipeline. When drilling a hole, the coolant enters the L-shaped cooling channel 12 and the cooling channel 22 through the rotary joint 3 to achieve cooling of the drilling part 11 and the auxiliary drilling rod 2.

[0028] During specific use, the auxiliary drilling rod 2 and the teeth 21 on its outer wall together form a self-tapping screw structure, and it is easier for the self-tapping screw to penetrate into the workpiece. Therefore, the auxiliary drilling rod 2 first penetrates into the high-speed steel, making the high-speed steel have a "self-tapping hole". Then, as the drill bit continues to drill, the drilling part 11 re-drills the "self-tapping hole", and the drilling part 11 can more easily complete the drilling of the high-speed steel;

[0029] During the hole-opening process, the coolant enters the L-shaped cooling channel 12 and the cooling channel 22 through the rotary joint 3 to cool the drilling part 11 and the auxiliary drilling rod 2. Embodiment 3

[0030] Refer to the attached Figures 3-5 , which is different from Embodiment 1 in that: a first through hole 13 is provided on the drilling part 11, and a second through hole 23 is provided on the auxiliary drilling rod 2;

[0031] The first through hole 13 communicates with the L-shaped cooling channel 12, and the second through hole 23 communicates with the cooling channel 22.

[0032] During specific use, the auxiliary drilling rod 2 and the teeth 21 on its outer wall together form a self-tapping screw structure, and it is easier for the self-tapping screw to penetrate into the workpiece. Therefore, the auxiliary drilling rod 2 first penetrates into the high-speed steel, making the high-speed steel have a "self-tapping hole". Then, as the drill bit continues to drill, the drilling part 11 re-drills the "self-tapping hole", and the drilling part 11 can more easily complete the drilling of the high-speed steel;

[0033] During the hole-opening process, the coolant enters the L-shaped cooling channel 12 and the cooling channel 22 through the rotary joint 3 to cool the drilling part 11 and the auxiliary drilling rod 2; and the coolant overflows to the outer walls of the drilling part 11 and the auxiliary drilling rod 2 through the first through hole 13 and the second through hole 23, achieving a better cooling effect on the drilling part 11 and the auxiliary drilling rod 2.

[0034] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way, and the cases of these combinations are not exhaustively described in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-speed steel hole-opening grinding drill for a machine tool, comprising a drill bit body (1), one end of the drill bit body (1) is provided with a drilling part (11), and it is characterized in that: An auxiliary drilling rod (2) is integrally provided at the end of the drilling part (11), and a tooth part (21) is provided on the outer wall of the auxiliary drilling rod (2).

2. The high-speed steel hole-opening grinding drill for machine tools according to claim 1, characterized in that, The auxiliary drilling rod (2) and the tooth part (21) on its outer wall together form a self-tapping screw structure.

3. A high-speed steel hole-opening grinding drill for a machine tool according to claim 1 or 2, characterized in that, A rotary joint (3) is rotatably connected to the outer wall of the drill bit body (1), and the rotary joint (3) has an interface (31), and the interface (31) is used to dock with a cooling pipeline.

4. The high-speed steel hole-opening grinding drill for a machine tool according to claim 3, wherein, An L-shaped cooling channel (12) is provided on the drill bit body (1), and a cooling channel (22) is provided on the auxiliary drilling rod (2), and the L-shaped cooling channel (12) and the cooling channel (22) are communicated.

5. A high-speed steel hole-opening grinding drill for a machine tool according to claim 4, characterized in that, A first through hole (13) is provided on the drilling part (11), and a second through hole (23) is provided on the auxiliary drilling rod (2).

6. The high-speed steel hole-opening grinding drill for a machine tool according to claim 5, characterized in that, The first through hole (13) is communicated with the L-shaped cooling channel (12), and the second through hole (23) is communicated with the cooling channel (22).

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