Split type drill bit for woodworking

Abstract

The utility model relates to the technical field of drill bits, and discloses a split type drill bit for woodworking, which comprises a drill rod, a spiral blade and a connecting part, the drill rod comprises a drill rod part and a drill rod head part, and the spiral blade comprises a spiral blade conveying part and a spiral blade drilling part; the included angle between the conical surface contour line of the spiral blade drilling part and the axis is d, the included angle between the conical surface contour line of the drill rod head and the axis is e, and d is larger than e; the screw pitches a of the spiral blades are sequentially increased in the direction from the spiral blade drilling part to the spiral blade conveying part. According to the spiral drill bit, the problem that when an existing spiral drill bit conducts drilling operation, drilling resistance is increased or even direct blocking is caused by drilling slag chippings, and then a drill rod cannot rotate can be solved; drilling slag chippings are effectively dredged, the drilling resistance is greatly reduced, and the blocking risk is reduced; and by reasonably distributing the thickness of the spiral blades of each part, the overall weight is reduced under the condition that the strength is ensured to be sufficient.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically, a split-type drill bit for woodworking. Background Technology

[0002] Using drill bits to process wood is a common method in the woodworking industry, mainly used for operations such as drilling, milling, and thread cutting on the surface of wood. Wood, as a natural building material, is widely used in furniture making, building structures, and interior decoration. To meet different process requirements, woodworking drill bits are designed in various shapes and sizes to accommodate different types of wood and processing precision requirements.

[0003] When machining large-diameter or deep holes in wood, or when cleaning the hole walls, commonly used drill bits are unsuitable due to their small size and inconvenient chip removal. Therefore, spiral blade drill bits can be used for machining. However, with existing spiral blade drill bits, the wood chips are dry during drilling, which can easily cause chip blockage, increasing drilling resistance or even preventing drilling altogether. Utility Model Content

[0004] The purpose of this utility model is to provide a split-type drill bit for woodworking, which solves the problem that existing auger drill bits cause increased drilling resistance or even direct blockage during drilling operations, thus preventing the drill rod from rotating.

[0005] This utility model is achieved through the following technical solution: a split-type drill bit for woodworking, comprising a drill rod and a spiral blade, wherein the spiral blade is connected to the drill rod, and the drill rod is provided with a connecting part. The drill rod includes a drill rod section and a drill rod head, and the spiral blade includes a spiral blade conveying section and a spiral blade drilling section. The overall contours of the spiral blade drilling section and the drill rod head are conical, while the overall contours of the drill rod section and the spiral blade conveying section are cylindrical. The drill rod section and the drill rod head are detachably connected, and the spiral blade drilling section is connected to the spiral blade conveying section. The spiral blade drilling section is mounted on the drill rod head, and the spiral blade conveying section is mounted on the drill rod section. The angle between the conical contour line of the spiral blade drilling section and the axis is d, and the angle between the conical contour line of the drill rod head and the axis is e, where d is greater than e. The pitch a of the spiral blade increases sequentially from the spiral blade drilling section to the spiral blade conveying section.

[0006] To better realize this utility model, the range of e is 10°-20°, the range of d is 30°-45°, and the difference between d and e is 15°-30°.

[0007] To better realize this utility model, the thickness of the spiral blade in the drilling part of the spiral blade is b, and the thickness of the spiral blade in the conveying part of the spiral blade is c, where b is greater than c.

[0008] To better realize this utility model, the cross-section of the spiral blade is a right trapezoid, wherein the inclined side is far away from the connecting part and the angle with the horizontal direction is f, and the range of f is 1°-2.5°.

[0009] To better realize this utility model, the drill rod part is further connected to the drill rod head by a thread, the helical blade is fixed to the drill rod by welding, and the helical blade conveying part is fixed to the helical blade drilling part by welding.

[0010] To better realize this utility model, the connecting part is further defined as a first connector, which is rectangular in shape and is mounted on the drill rod. The first connector is provided with a pin hole.

[0011] To better realize this utility model, the connecting part is further defined as a second connecting head, and the second connecting head is shaped like a polygonal prism.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] (1) This utility model can solve the problem that when existing auger drill bits are drilling, the drilling resistance is increased or even directly blocked, which leads to the drill rod being unable to rotate; it can effectively clear the drilling resistance and reduce the risk of blockage.

[0014] (2) By setting a reasonable distribution of the thickness of the spiral blades in each part, this utility model reduces the overall weight while ensuring sufficient strength;

[0015] (3) This utility model achieves the reuse of drill rod and spiral blade conveying part through split design, reducing scrap and saving costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model from a downward viewing angle.

[0018] Figure 3 This is a cross-sectional view of the overall structure of this utility model.

[0019] Figure 4 This is a cross-sectional view of the spiral blade conveying section and the drill pipe head structure.

[0020] Figure 5 for Figure 3 A magnified view of a portion of point A in the middle.

[0021] Figure 6This is a schematic diagram of the second connector structure.

[0022] Wherein: 101-Drill rod section; 102-Helical blade conveying section; 103-First connector; 104-Pin hole; 105-Helical blade drilling section; 106-Drill rod head; 107-Second connector. 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] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] This embodiment provides a split-type drill bit for woodworking, specifically as follows: Figures 1-4 As shown, the system includes a drill rod and a spiral blade. The spiral blade is connected to the drill rod, and the drill rod has a connecting part. The drill rod includes a drill rod section 101 and a drill rod head 106. The spiral blade includes a spiral blade conveying section 102 and a spiral blade drilling section 105. The spiral blade drilling section 105 and the drill rod head 106 are both tapered in shape, while the drill rod section 101 and the spiral blade conveying section 102 are cylindrical in shape. The drill rod section 101 and the drill rod head 106 are detachably connected. The spiral blade drilling section 105 is connected to the spiral blade conveying section 102; the spiral blade drilling section 105 is mounted on the drill rod head 106, and the spiral blade conveying section 102 is mounted on the drill rod section 101; the angle between the conical profile of the spiral blade drilling section 105 and the axis is d, and the angle between the conical profile of the drill rod head 106 and the axis is e, where d is greater than e; the pitch a of the spiral blade increases sequentially from the spiral blade drilling section 105 to the spiral blade conveying section 102.

[0027] Since d is greater than e, the width of the drill cuttings moving along the spiral blades will increase during drilling using this device, meaning the cross-section of the channel for drill cuttings to pass through is increasing, thus preventing blockage of drill cuttings during drilling operations. Since a increases sequentially along the direction from the drilling section 105 of the spiral blades to the conveying section 102 of the spiral blades, the height of the drill cuttings moving along the spiral blades will increase, meaning the cross-section of the channel for drill cuttings to pass through is increasing, further preventing blockage of drill cuttings during drilling operations.

[0028] The above settings can solve the problem that drill cuttings and debris can easily increase drilling resistance or even cause blockage during drilling operations, thus preventing the drill pipe from rotating; effectively clearing drill cuttings and debris, significantly reducing drilling resistance, and lowering the risk of blockage.

[0029] Example 2:

[0030] This embodiment further defines the range of e as 10°-20°, the range of d as 30°-45°, and the range of the difference between d and e as 15°-30°.

[0031] This angle, while ensuring drilling efficiency, greatly increases the cross-sectional area of ​​the drill cuttings channel, reduces drilling resistance, and lowers the risk of blockage.

[0032] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0033] Example 3:

[0034] This embodiment further limits the thickness of the helical blade based on the above embodiment, specifically as follows: Figures 3-4 As shown, the thickness of the spiral blade in the spiral blade drilling section 105 is b, and the thickness of the spiral blade in the spiral blade conveying section 102 is c, where b is greater than c.

[0035] Since the helical blades in the drilling section 105 need to undertake the drilling task, the load is greater than that of the helical blades in the conveying section 102. In order to ensure the strength of the helical blades in the drilling section 105, their thickness is increased to effectively prevent the risk of blade roll-out and chipping.

[0036] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0037] Example 4:

[0038] This embodiment further defines the shape of the helical blade based on the above embodiment, specifically as follows: Figure 5As shown, the cross-section of the helical blade is a right trapezoid, wherein the inclined side is far away from the connecting part and the angle between it and the horizontal direction is f, and the range of f is 1°-2.5°.

[0039] The above design ensures that the thickness of the helical blade at the end furthest from the drill pipe is less than that at the end closest to the drill pipe, resulting in higher strength and better connection stability on the side of the helical blade closest to the drill pipe, thus achieving a balance between lightweight design and structural strength.

[0040] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0041] Example 5:

[0042] This embodiment further defines the above embodiments, specifically as follows: Figure 3 As shown, the drill rod section 101 is threadedly connected to the drill rod head 106, the helical blade is fixed to the drill rod by welding, and the helical blade conveying section 102 is fixed to the helical blade drilling section 105 by welding.

[0043] Since the wear of the spiral blade drilling section 105 and the drill rod head 106 is more severe than that of the drill rod section 101 and the spiral blade conveying section 102, it is necessary to remove the spiral blade drilling section 105 and the drill rod head 106 and replace them with new spiral blade drilling sections 105 and drill rod heads 106 on the original drill rod section 101 and spiral blade conveying section 102. This allows for the reuse of the drill rod section 101 and the spiral blade conveying section 102, reduces the amount of scrap, and saves costs.

[0044] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0045] Example 6:

[0046] This embodiment further defines the connecting portion based on the above embodiment, specifically as follows: Figure 1 As shown, the connecting part is a first connector 103, which is rectangular in shape. The first connector 103 is installed on the drill rod 101 and has a pin hole 104.

[0047] When connecting the drill bit to the drive device, the drive device is aligned with the first connector 103, and a pin is inserted into the pin hole 104 to prevent the first connector 103 from disengaging from the drive device. At this time, the connection between the drill bit and the drive device is achieved.

[0048] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0049] Example 7:

[0050] This embodiment further defines the connecting portion based on the above embodiment, specifically as follows: Figure 6 As shown, the connecting part is a second connector 107, and the second connector 107 has a polygonal prism shape.

[0051] The second connector 107 is locked and fixed by the drive device, thus connecting the drill bit to the drive device.

[0052] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A split-type drill bit for woodworking, comprising a drill rod and a spiral blade, wherein the spiral blade is connected to the drill rod, and the drill rod is provided with a connecting part, characterized in that: The drill rod includes a drill rod section (101) and a drill rod head (106), and the helical blade includes a helical blade conveying section (102) and a helical blade drilling section (105). The overall outline of the helical blade drilling section (105) and the drill rod head (106) is conical, while the overall outline of the drill rod section (101) and the helical blade conveying section (102) is cylindrical. The drill rod section (101) and the drill rod head (106) are detachably connected, and the helical blade drilling section (105) and the helical blade... The blade conveying section (102) is connected; the spiral blade drilling section (105) is installed on the drill rod head (106), and the spiral blade conveying section (102) is installed on the drill rod section (101); the angle between the conical profile of the spiral blade drilling section (105) and the axis is d, and the angle between the conical profile of the drill rod head (106) and the axis is e, where d is greater than e; the pitch a of the spiral blade increases sequentially from the spiral blade drilling section (105) to the spiral blade conveying section (102).

2. A split-type drill bit for woodworking according to claim 1, characterized in that: The range of e is 10°-20°, the range of d is 30°-45°, and the difference between d and e is 15°-30°.

3. A split-type drill bit for woodworking according to claim 1, characterized in that: The thickness of the spiral blade in the spiral blade drilling section (105) is b, and the thickness of the spiral blade in the spiral blade conveying section (102) is c, where b is greater than c.

4. A split-type drill bit for woodworking according to claim 1, characterized in that: The cross-section of the helical blade is a right trapezoid, wherein the inclined side is far away from the connecting part and the angle between it and the horizontal direction is f, and the range of f is 1°-2.5°.

5. A split-type drill bit for woodworking according to claim 1, characterized in that: The drill rod section (101) is threadedly connected to the drill rod head (106), the helical blade is fixed to the drill rod by welding, and the helical blade conveying section (102) is fixed to the helical blade drilling section (105) by welding.

6. A split-type drill bit for woodworking according to claim 1, characterized in that: The connecting part is a first connector (103), which is rectangular in shape. The first connector (103) is installed on the drill rod (101) and has a pin hole (104).

7. A split-type drill bit for woodworking according to claim 1, characterized in that: The connecting part is a second connector (107), and the second connector (107) is in the shape of a polygonal prism.

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