Bolt hole drill bit for high-efficiency fine machining of low-pressure aluminum alloy hub

Abstract

The utility model discloses a bolt hole drill bit for efficient fine machining of a low-pressure aluminum alloy hub. The bolt hole drill bit comprises a drill bit body and a heat dissipation coating. A blade is arranged on the outer side of the bottom end of the drill bit, an auxiliary structure is arranged on one side of the blade, and a heat dissipation coating is arranged on the surface of the drill bit. An anti-skid structure is arranged at the top end of the drill bit, the auxiliary structure comprises a diamond piece, the diamond piece is installed on one side of the cutting edge, a through groove is formed in the diamond piece, a fixing bolt is inserted into the through groove, and a fixing groove is formed in the cutting edge. According to the drill bit, the auxiliary structure is arranged, when the drill bit is used, the diamond pieces are fixed through rotation between the fixing bolts and the fixing grooves, the diamond pieces can be directly replaced when damaged through cooperation between the fixing bolts and the fixing grooves, the drill bit does not need to be directly replaced, and the drill bit is convenient to use. And the use cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure aluminum alloy wheel hub processing technology, and in particular to a bolt hole drill bit for high-efficiency and precision machining of low-pressure aluminum alloy wheel hubs. Background Technology

[0002] Low-pressure aluminum alloy wheels are mainly used in automobiles, motorcycles and other vehicles to support the weight of the vehicle, install tires, transmit power and ensure driving stability. One step in the processing of low-pressure aluminum alloy wheels is to drill a hole for bolt installation. A bolt hole drill bit is needed when drilling the hole.

[0003] To address this, patent specification CN202861474U discloses a bolt hole drill bit, comprising a drill head and a drill tip. The drill head has a feed notch, and drill cutting edges are formed on both sides of the feed notch. The feed notch extends spirally along the drill body towards the drill tip to form a discharge groove. A reinforcing zone is also provided at the discharge groove position on the first cutting side of the connection between the drill head and the drill body. The bolt hole drill bit using this utility model has the advantages of strong drilling capacity, fast processing speed, and long drill life. As a preferred technical solution of this utility model, the drill head and the drill body are connected by a transition zone. The included angle of the transition zones on both sides of the drill body is 90 degrees β, which achieves a good connection and smooth transition between the drill head and the drill body.

[0004] The aforementioned technology increases strength by welding diamond sheets onto the cutting edge. However, during prolonged use, once the diamond sheets wear or are damaged, the entire drill bit needs to be replaced, resulting in high operating costs. Therefore, a low-pressure aluminum alloy wheel hub high-efficiency precision machining bolt hole drill bit is needed to solve this problem. Utility Model Content

[0005] The purpose of this utility model is to provide a high-efficiency precision bolt hole drill bit for low-pressure aluminum alloy wheel hubs, in order to solve the defect of existing bolt hole drill bits that require replacement of the entire drill bit when the diamond disc is worn or damaged, resulting in high usage costs.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bolt hole drill bit for high-efficiency precision machining of low-pressure aluminum alloy wheel hubs, comprising a drill bit and a heat dissipation coating; a cutting edge is provided on the outer side of the bottom end of the drill bit, an auxiliary structure is provided on one side of the cutting edge, and a heat dissipation coating is provided on the surface of the drill bit; an anti-slip structure is provided at the top end of the drill bit, the auxiliary structure includes a diamond sheet, the diamond sheet is installed on one side of the cutting edge, a through groove is provided inside the diamond sheet, a fixing bolt is inserted into the through groove, and a fixing groove is provided inside the cutting edge.

[0007] Preferably, one end of the fixing bolt is inserted into the inside of the fixing groove, and the fixing bolt and the fixing groove form a threaded connection.

[0008] Preferably, the inner diameter of the through groove is larger than the outer diameter of the fixing bolt, and the through groove and the fixing bolt form an insertion structure.

[0009] Preferably, there are two sets of fixing bolts, which are symmetrically distributed inside the diamond sheet.

[0010] Preferably, the anti-slip structure includes a connecting rod, which is fixed to the top of the drill bit. A first anti-slip texture is provided on the outer side of the connecting rod, and a second anti-slip texture is provided on one side of the first anti-slip texture.

[0011] Preferably, multiple sets of the first and second anti-slip patterns are provided, and the multiple sets of the first and second anti-slip patterns are distributed in a ring on the outer side of the connecting rod.

[0012] Preferably, the material of the heat dissipation coating is chromium nitride.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the auxiliary structure allows the diamond sheet to be replaced when it is damaged, and the design makes it less likely to fall off after being fixed.

[0014] With the auxiliary structure, the diamond sheet is fixed by the rotation between the fixing bolt and the fixing groove when the drill bit is used. The cooperation between the fixing bolt and the fixing groove allows the diamond sheet to be replaced directly when it is damaged, without having to replace the drill bit, thus saving the cost of use.

[0015] By incorporating an anti-slip structure, the combined use of the first and second anti-slip textures increases the friction on the surface of the connecting rod, making it less likely for the connecting rod to slip and fall off after being clamped and fixed.

[0016] By incorporating a heat-dissipating coating, which has a low coefficient of friction, friction between the drill bit and the workpiece can be reduced during drilling, thereby reducing the heat generated by friction. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a bottom view of the structure of this utility model;

[0020] Figure 4 For the present utility model Figure 1 A magnified view of the structure at point A in the middle;

[0021] Figure 5 This is a front view schematic diagram of the heat dissipation coating structure of this utility model.

[0022] In the diagram: 1. Drill bit; 2. Anti-slip structure; 201. Connecting rod; 202. First anti-slip texture; 203. Second anti-slip texture; 3. Cutting edge; 4. Heat dissipation coating; 5. Auxiliary structure; 501. Diamond sheet; 502. Fixing groove; 503. Fixing bolt; 504. Through groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model embodiment provides a high-efficiency precision machining drill bit for bolt holes in low-pressure aluminum alloy wheel hubs, such as... Figures 1-5 As shown, it includes a drill bit 1 and a heat dissipation coating 4; a cutting edge 3 is provided on the outer side of the bottom end of the drill bit 1, an auxiliary structure 5 is provided on one side of the cutting edge 3, and a heat dissipation coating 4 is provided on the surface of the drill bit 1.

[0025] The auxiliary structure 5 includes a diamond sheet 501, which is installed on one side of the cutting edge 3. A through groove 504 is formed inside the diamond sheet 501, and a fixing bolt 503 is inserted inside the through groove 504. A fixing groove 502 is formed inside the cutting edge 3, and one end of the fixing bolt 503 is inserted into the fixing groove 502. The fixing bolt 503 and the fixing groove 502 form a threaded connection. The inner diameter of the through groove 504 is larger than the outer diameter of the fixing bolt 503. The through groove 504 and the fixing bolt 503 form an insertion structure. Two sets of fixing bolts 503 are provided, and the two sets of fixing bolts 503 are symmetrically distributed inside the diamond sheet 501.

[0026] In a further preferred embodiment of this utility model, such as Figures 1-5 As shown: When using drill bit 1, the diamond sheet 501 is installed on one side of the cutting edge 3. After installation, the retaining pin 503 is inserted into the gold fixing groove 502 through the through groove 504. Then, the retaining pin 503 is rotated. As the retaining pin 503 rotates with the fixing groove 502, the diamond sheet 501 is fixed. Through the cooperation between the retaining pin 503 and the fixing groove 502, the diamond sheet 501 can be replaced when damaged, without having to replace the drill bit 1 directly, thus saving on usage costs.

[0027] The anti-slip structure 2 includes a connecting rod 201, which is fixed to the top of the drill bit 1. A first anti-slip texture 202 is provided on the outer side of the connecting rod 201, and a second anti-slip texture 203 is provided on one side of the first anti-slip texture 202. Multiple sets of the first anti-slip texture 202 and the second anti-slip texture 203 are provided, and the multiple sets of the first anti-slip texture 202 and the second anti-slip texture 203 are distributed in a ring on the outer side of the connecting rod 201. The heat dissipation coating 4 is made of chromium nitride.

[0028] In a further preferred embodiment of this utility model, such as Figures 1-3 As shown: When using drill bit 1 for fixing, the cooperation between the first anti-slip texture 202 and the second anti-slip texture 203 can increase the friction on the surface of the connecting rod 201, making it less likely for the connecting rod 201 to slip and fall off after being clamped and fixed.

[0029] 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bolt hole drill bit for high efficiency fine machining of a low pressure aluminum alloy wheel hub, characterized by: Includes a drill bit (1) and a heat dissipation coating (4); The drill bit (1) has a cutting edge (3) on the outer side of its bottom end, and an auxiliary structure (5) is provided on one side of the cutting edge (3). The surface of the drill bit (1) is provided with a heat dissipation coating (4). The top of the drill bit (1) is provided with an anti-slip structure (2). The auxiliary structure (5) includes a diamond plate (501). The diamond plate (501) is installed on one side of the cutting edge (3). A through groove (504) is opened inside the diamond plate (501). A fixing bolt (503) is inserted inside the through groove (504). A fixing groove (502) is opened inside the cutting edge (3).

2. The bolt hole drill bit for high efficiency fine machining of a low pressure aluminum alloy wheel hub according to claim 1, characterized in that: One end of the fixing bolt (503) is inserted into the interior of the fixing groove (502), and the fixing bolt (503) and the fixing groove (502) form a threaded connection.

3. The bolt hole drill bit for high efficiency fine machining of low pressure aluminum alloy wheel hub according to claim 1, characterized in that: The inner diameter of the through groove (504) is larger than the outer diameter of the fixing bolt (503), and the through groove (504) and the fixing bolt (503) form an insertion structure.

4. The bolt hole drill bit for high efficiency fine machining of a low pressure aluminum alloy wheel hub according to claim 1, characterized in that: The fixing bolts (503) are provided in two sets, and the two sets of fixing bolts (503) are symmetrically distributed inside the diamond sheet (501).

5. The bolt hole drill bit for high efficiency fine machining of low pressure aluminum alloy wheel hub according to claim 1, characterized in that: The anti-slip structure (2) includes a connecting rod (201), which is fixed to the top of the drill bit (1). A first anti-slip texture (202) is provided on the outer side of the connecting rod (201), and a second anti-slip texture (203) is provided on one side of the first anti-slip texture (202).

6. A low pressure aluminum alloy wheel high efficiency fine machining bolt hole drill bit according to claim 5, characterized in that: Multiple sets of the first anti-slip texture (202) and the second anti-slip texture (203) are provided, and the multiple sets of the first anti-slip texture (202) and the second anti-slip texture (203) are distributed in a ring on the outside of the connecting rod (201).

7. A low pressure aluminum alloy wheel high efficiency fine machining bolt hole drill bit according to claim 1, characterized in that: The heat dissipation coating (4) is made of chromium nitride.

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