Punching drill bit applied to hole wall smoothness

Abstract

The utility model discloses a punching drill bit applied to hole wall smoothness. The punching drill bit comprises a drill bit body, a drilling part of the drill bit body is provided with two spiral chip grooves, a drilling body is formed between the chip grooves, the edge of the head end of the drilling body is a drilling edge, and the edge of one side of the drilling body is a wall scraping edge; the drilling body is provided with at least two strip-shaped grooves, the strip-shaped grooves extend along the central axis of the drill bit body, a plurality of unit grooves are formed in the drilling body through the strip-shaped grooves, and the edge of one side of each unit groove is a wall milling blade. According to the double-edge twist drill, the strip-shaped grooves are formed in the drilling body and enable the drilling body to form the unit grooves, the unit grooves and the wall attaching face form the wall milling edges, and the edge of the wall attaching face is the wall scraping edge, so that during drilling, chips can be smoothly discharged through the chip discharging groove, the wall scraping edge can remove burrs on the hole wall, and the hole can be prevented from being scraped. And the wall milling blade can finely trim the hole wall, so that the smoothness of the hole wall is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and in particular relates to a drilling drill bit used for improving the finish of a hole wall. Background Art

[0002] The drill bits are mostly two-edged or three-edged twist drills, and the hole walls are relatively rough after drilling. For pin holes with high precision, a reamer is needed to further ream the holes after drilling to further achieve the required hole diameter and the smoothness of the hole walls. The processing of a pin hole requires two process steps and involves two processing tools, resulting in low production efficiency. In order to solve this problem, a drilling drill bit for hole wall smoothness is provided. Utility Model Content

[0003] In view of this, the technical problem to be solved by the utility model is to provide a drilling drill bit for improving the smoothness of hole walls, thereby solving the problem of poor smoothness of hole walls drilled by the drill bit in the prior art.

[0004] In order to solve the above-mentioned technical problems, the utility model discloses a drilling drill bit used for hole wall finish, comprising: a drill bit body; a drilling portion of the drill bit body having two spiral chip grooves, a drilling body formed between the chip grooves, the edge of the front end of the drilling body being a drilling blade, and one side edge of the drilling body being a wall scraping blade; at least two strip grooves are provided on the drilling body, the strip grooves extend along the central axis of the drill bit body, the strip grooves form a plurality of unit grooves on the drilling body, and one side edge of the unit groove is a wall milling blade.

[0005] Furthermore, the outer wall surface of the drilling body has a concave surface and a wall-adhering surface.

[0006] Furthermore, the unit grooves and the wall-adhering surface form a wall milling edge.

[0007] Furthermore, the cross section of the strip-shaped groove is fan-shaped, and one side is longer than the other side.

[0008] Furthermore, the first and last ends of the strip groove respectively fall at the first and last ends of a chip row groove.

[0009] Compared with the prior art, the present application can obtain the following technical effects:

[0010] The utility model provides strip grooves on the drilling body of the double-edged twist drill, the strip grooves form a plurality of unit grooves on the drilling body, the unit grooves and the wall-adhering surface form a wall milling edge, the edge of the wall-adhering surface is a wall scraping edge, so that when drilling, chips can be smoothly removed through the chip removal groove, the wall scraping edge can remove burrs on the hole wall, and the wall milling edge can fine-tune the hole wall, thereby improving the smoothness of the hole wall.

[0011] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 It is a schematic diagram of a drill bit according to one embodiment of the utility model from one perspective;

[0014] Figure 2 It is a schematic diagram of another viewing angle of a drill bit according to one embodiment of the utility model.

[0015] Figure ID

[0016] The drill bit comprises a main body 1, a chip removal groove 2, a drilling body 3, a drilling edge 4, a wall scraping edge 5, a strip groove 6, a unit groove 7, a wall milling edge 8, a concave surface 9, and a wall-adhering surface 10. DETAILED DESCRIPTION

[0017] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] Please refer to Figure 1 and Figure 2 , Figure 1 It is a schematic diagram of a drill bit according to one embodiment of the utility model from one perspective; Figure 2 It is a schematic diagram of another viewing angle of a drill bit according to one embodiment of the utility model.

[0019] A drilling drill used for improving the finish of hole walls, comprising: a drill body 1; a drilling portion of the drill body 1 having two spiral chip grooves 2, a drilling body 3 formed between the chip grooves 2, an edge of the head end of the drilling body 3 being a drilling edge 4, and an edge of one side of the drilling body 3 being a wall scraping edge 5; the drilling body 3 is provided with two strip grooves 6 spaced 180° apart, the strip grooves 6 extending along the central axis of the drill body 1, the strip grooves 6 forming a plurality of unit grooves 7 on the drilling body 3, and an edge of one side of the unit grooves 7 being a wall milling edge 8.

[0020] The outer wall surface of the drilling body 3 has a concave surface 9 and a wall-adhering surface 10. The width of the concave surface 9 is greater than the width of the wall-adhering surface 10. The concave surface 9 can reduce the contact between the outer wall surface of the drilling body 3 and the hole wall, thereby reducing friction. The unit groove 7 and the wall-adhering surface 10 form a milling wall blade 8; the cross-section of the strip groove 6 is fan-shaped, and one side is longer than the other side. The head and tail ends of the strip groove 6 fall at the head and tail ends of a chip groove 2 respectively.

[0021] To sum up, the utility model provides a strip groove 6 on the drilling body of the double-edged twist drill, the strip groove 6 forms a plurality of unit grooves 7 on the drilling body 3, the unit groove 7 and the wall surface 10 form a wall milling blade 8, the edge of the wall surface 10 is a scraping blade 5, so that when drilling, chips can be smoothly removed through the chip removal groove 2, the scraping blade 5 can remove burrs on the hole wall, and the milling blade 8 can refine the hole wall, thereby improving the smoothness of the hole wall.

[0022] 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 drilling bit for improving the finish of a hole wall, comprising: Drill bit body; The drilling part of the drill body has two spiral chip grooves, a drilling body is formed between the chip grooves, the edge of the first end of the drilling body is a drilling edge, and the edge of one side of the drilling body is a wall scraping edge; The invention is characterized in that at least two strip grooves are provided on the drilling body, the strip grooves extend along the central axis of the drill body, and the strip grooves form a plurality of unit grooves on the drilling body, and one side edge of the unit groove is a wall milling blade.

2. The drilling drill bit for improving the finish of a hole wall as claimed in claim 1, characterized in that: The outer wall surface of the drilling body has a concave surface and a wall-adhering surface.

3. The drilling bit for improving the finish of a hole wall as claimed in claim 1, characterized in that: The unit groove and the wall surface form a wall milling edge.

4. The drilling drill bit for improving the finish of a hole wall as claimed in claim 1, characterized in that: The cross section of the strip-shaped groove is fan-shaped, and one side is longer than the other side.

5. The drilling drill bit for improving the finish of a hole wall as claimed in claim 1, characterized in that: The first and last ends of the strip groove respectively fall at the first and last ends of a chip row groove.

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