Large-chip-removal engineering drill bit

Abstract

The utility model discloses a large chip removal engineering drill bit which is formed by welding a cylinder body and a drill tooth steel ring, a plurality of diamond strips are evenly brazed on the outer surface of the drill tooth steel ring, and chip removal channels are formed on the inner circumferential face and the outer circumferential face of the drill tooth steel ring between the adjacent diamond strips. On the basis of a traditional engineering drill bit, the engineering drill bit utilizes a plurality of chip removal channels formed between the diamond strips, drilling chips can be smoothly discharged along the chip removal channels conveniently when the engineering drill bit drills holes, the diamond strips are arranged on the two sides of each chip removal channel, and the cutting performance and the service life of the drill bit are guaranteed from the side face.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering drills, in particular to a large chip removal engineering drill bit. Background Art

[0002] Engineering drill bits are one of the commonly used tools in engineering, mainly used in buildings, that is, for drilling wall holes during the installation of water, electricity, heating, gas, air conditioning, and pipelines.

[0003] In the prior art, there is a Chinese utility model patent with the publication number CN212045390U and the name of an ultra-thin wall engineering drill bit. The drill bit in this technical solution includes a drill barrel support rod and a drill tooth steel ring welded to the top of the drill barrel support rod. A plurality of chip removal openings are horizontally opened on one side of the tooth steel ring, and the plurality of chip removal openings are evenly opened on the tooth steel ring along the circumferential direction of the drill tooth steel ring. A drill tooth structure is provided between adjacent chip removal openings. This drill bit only opens chip removal openings on the end face to facilitate the cutting-in of the drill bit. However, the drill chips generated during cutting-in generally accumulate in the chip removal openings. Since the inner and outer peripheral walls of the drill bit are in close contact with the drill hole, it is very difficult for the drill chips to be discharged along the drill bit, resulting in poor chip removal, excessive friction between the drill bit and the drill hole, high temperature and large wear of the drill bit, which greatly affects the use effect and service life of the drill bit. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a large chip removal engineering drill bit to solve the problems of poor chip removal during cutting-in of general drill bits, excessive friction between the drill bit and the drill hole, and greatly affecting the use effect and service life of the drill bit.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A large chip removal engineering drill bit, the engineering drill bit is welded by a cylinder body and a drill tooth steel ring. A plurality of diamond bars are evenly brazed on the outer surface of the drill tooth steel ring, and chip removal channels are formed on the inner and outer circumferential surfaces of the drill tooth steel ring between adjacent diamond bars.

[0007] A further technical solution is: grooves adapted to the diamond bars are provided on the drill tooth steel ring.

[0008] A further technical solution is: the diamond bar is composed of a cutting bar and a substrate, the substrate is brazed in the groove, and the cutting bars are located on both sides of the substrate.

[0009] A further technical solution is: the cutting bar is inclined, and the inclination direction is the same as the rotation direction of the engineering drill bit.

[0010] A further technical solution is: a grid shape is formed between the cutting bar and the substrate.

[0011] A further technical solution is that the cutting strip is an arc-shaped strip adapted to the drill tooth steel ring.

[0012] Compared with the prior art, at least one of the beneficial effects that the present utility model can achieve is as follows:

[0013] The present utility model provides a large chip removal engineering drill bit. On the basis of the traditional engineering drill bit, the engineering drill bit utilizes a plurality of chip removal channels formed between diamond strips, which facilitates the smooth discharge of drill chips along the chip removal channels when the engineering drill bit drills a hole. Moreover, both sides of the chip removal channels are diamond strips, which also ensures the cutting performance and service life of the drill bit from the side. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a large chip removal engineering drill bit of the present utility model.

[0015] Figure 2 For the present utility model Figure 1 It is a structural schematic diagram of the drill tooth steel ring and the diamond strip in the present utility model.

[0016] Figure 3 For the present utility model Figure 2 It is a structural schematic diagram of the drill tooth steel ring in the present utility model.

[0017] Figure 4 For the present utility model Figure 2 It is a structural schematic diagram of the diamond strip in the present utility model.

[0018] Reference numerals: 1, engineering drill bit; 2, cylinder; 3, drill tooth steel ring; 4, diamond strip; 5, chip removal channel; 6, groove; 7, cutting strip; 8, substrate. Detailed Embodiments

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model that is required to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0022] It should be noted that like reference numerals and letters indicate like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] As shown in this embodiment Figure 1 and Figure 2 A large chip - discharging engineering drill bit. The engineering drill bit 1 is formed by welding a cylinder 2 and a drill tooth steel ring 3. A plurality of diamond strips 4 are evenly brazed on the outer surface of the drill tooth steel ring 3. Chip - discharging channels 5 are formed between adjacent diamond strips 4 on the inner and outer circumferential surfaces of the drill tooth steel ring 3.

[0027] The cylinder 2 and the drill tooth steel ring 3 are generally formed by welding, and of course, integral formation is not excluded. The drill tooth steel ring 3 is also provided with a chip - discharging groove consistent with the prior art. Since there is no support at this groove, diamond strips 4 are not arranged along the circumferential direction, but diamond strips 4 can be brazed on the groove surface. The diamond strips 4 are evenly arranged in the circumferential direction and are brazed on the inner and outer circumferential surfaces of the drill tooth steel ring 3, and at the same time, chip - discharging channels 5 are formed to form a cutting surface on the outer surface of the drill tooth steel ring 3. When the drill bit drills into the borehole, the drill chips can be smoothly discharged along the chip - discharging channels 5.

[0028] Example Two:

[0029] Based on the above embodiments, this embodiment, for example, Figure 3 shows that a groove 6 adapted to the diamond strip 4 is provided on the drill tooth steel ring 3.

[0030] The diamond strip 4 can be first installed in the groove 6 on the drill tooth steel ring 3 and then brazed. The purpose is to pre-stabilize the diamond strip 4 and facilitate subsequent brazing.

[0031] Example Three:

[0032] Based on the above embodiments, this embodiment, for example, Figure 4 shows that the diamond strip 3 is composed of a cutting strip 7 and a substrate 8. The substrate 8 is brazed in the groove 6, and the cutting strips 7 are located on both sides of the substrate 8.

[0033] When the drill tooth steel ring 3 is worn to a certain extent, the substrate 8 of the diamond strip 3 can play a cutting role on the end face of the drill bit, delay the wear of the drill tooth steel ring 3, and improve the cutting force. In addition, the separate design of the cutting strip 7 and the substrate 8 facilitates shaping and brazing.

[0034] Preferably, the cutting strip 7 is inclined, and the inclination direction is the same as the rotation direction of the engineering drill bit 1.

[0035] The chip removal channels 5 are formed jointly by the adjacent cutting strips 7 and the drill tooth steel ring 3. The chip removal channels 5 are also inclined as the cutting strips 7 are inclined, and the inclination direction is the same as the rotation direction of the engineering drill bit 1, which is convenient for discharging the drill chips smoothly. Moreover, with the help of centrifugal force, the drill chip discharging effect is better.

[0036] Preferably, a grid shape is formed between the cutting strip 7 and the substrate 8.

[0037] The diamond strip 3 in a grid shape can form cutting veins, with a wider cutting surface, and is divided into several small cutting units, reducing the force and improving the cutting ability.

[0038] Preferably, the cutting strip 7 is an arc-shaped strip adapted to the drill tooth steel ring 3.

[0039] The cutting strip 7 can better fit the drill tooth steel ring 3.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large chip removal engineering drill bit, the engineering drill bit (1) is welded by a barrel (2) and a drill tooth steel ring (3), characterized in that: A plurality of diamond strips (4) are uniformly brazed on the outer surface of the drill tooth steel ring (3), and chip removal channels (5) are formed between adjacent diamond strips (4) on the inner and outer peripheral surfaces of the drill tooth steel ring (3).

2. The large chip removal engineering drill bit according to claim 1, characterized in that: The drill tooth steel ring (3) is provided with a groove (6) adapted to the diamond strip (4).

3. The large chip removal engineering drill bit according to claim 2, characterized in that: The diamond strip (4) is composed of a cutting strip (7) and a base plate (8), wherein the base plate (8) is brazed in the groove (6), and the cutting strip (7) is located on both sides of the base plate (8).

4. The large chip removal engineering drill bit according to claim 3, characterized in that: The cutting strip (7) is arranged to be inclined, and the inclination direction is consistent with the rotation direction of the engineering drill bit (1).

5. The large chip removal engineering drill bit according to claim 3, characterized in that: The cutting strip (7) and the base plate (8) are in a grid shape.

6. The large chip removal engineering drill bit according to claim 3, characterized in that: The cutting strip (7) is in the shape of an arc strip that matches the drill tooth steel ring (3).

Images