Double-edge flat wing drill

Abstract

The utility model discloses a double-edge flat wing drill which comprises a drill bit and a drill handle, the drill bit is provided with a drill bit body, a circumferential cutting edge, a main cutting edge and a secondary cutting edge, the drill bit body is provided with a chip discharging groove opposite to the main cutting edge, and the drill handle and the drill bit body are fixedly provided with a sleeve and a connecting rod in circumferential linkage relative to the sleeve in an extending mode. The other end is connected with an electric drill gun; according to the double-edge flat-wing drill, the secondary cutting edge is arranged to assist the main cutting edge, so that the bottom surface of a drilled hole is subjected to primary damage and secondary cutting machining, the drilling difficulty is reduced, the circumferential cutting edge is further matched, the machining quality can be improved, the sleeve, the connecting rod and the extension rod are rotationally connected, and a deep space can be freely lengthened and machined; according to the flat-wing drill, the mode that the cutting edge is welded to the drill bit is adopted, for the drill bit, when the cutting edge is damaged after being used, the cutting edge can be relatively separated through heating to be replaced with a new edge, use of the flat-wing drill is prolonged, and waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hardware tool technology, specifically to a double-edged flat-bladed drill. Background Technology

[0002] Woodworking is a craft, a unique skill, and a commonly used technique in construction. It is one of the three traditional trades in China (woodworking, timber, and carpentry). In everyday woodworking, drilling holes is an essential task for carpenters. Many carpenters use hand drills, but this often takes a long time and doesn't produce satisfactory holes. Some carpenters use hole saws, but frequently, due to poor hole saw design, the blade breaks, making drilling inconvenient and requiring a lot of time to repair the hole saw.

[0003] Currently used woodworking vane drills consist of a drill bit, a circumferential cutting edge, a main cutting edge, a chip flute, a drill rod, and a drill shank. The drill bit is located at the center of the front end face of the drill rod. The outer circumference of the drill rod's front end face has a circumferential cutting edge. Two main cutting edges are located in the middle of the drill rod's front end face and on both sides of the drill bit. The chip flute is located in front of the main cutting edges. The drill shank is located at the rear end of the drill rod. Limitations of vane drills include the easy breakage of the cutting edges, especially after penetrating deep into the wood. The high-speed friction between the main cutting edges and the wood also accelerates wear on the main cutting edges. Existing solutions for vane drills primarily focus on improving the drill bit's strength and lifespan by changing materials and drill bit hardening processes to meet current woodworking requirements. Utility Model Content

[0004] In view of the existing technology, the purpose of this utility model is to provide a double-bladed flat-bladed drill with a secondary blade to assist the main cutting edge, reduce cutting edge wear, improve the machining capability of the flat-bladed drill, and extend its service life.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a double-bladed flat-wing drill, including a drill tip and a drill shank. The drill tip is provided with a drill bit, a circumferential cutting edge, a main cutting edge and a secondary cutting edge. The drill bit is provided with a chip removal groove relative to the main cutting edge. The drill shank includes a sleeve that is fixedly extended from the drill bit and a connecting rod that is circumferentially linked to the sleeve. One end of the connecting rod is inserted into the sleeve, and the other end is used to connect to the electric drill gun.

[0006] As a further feature of the above solution, the sleeve is provided with a polygonal insertion groove, and the connecting rod is provided with an insertion rod opposite to the polygonal insertion groove.

[0007] As a further feature of the above solution, the sleeve is provided with a radial fixing hole relative to the polygonal insertion groove, and the insertion rod is provided with a limiting groove, with the radial fixing hole positioned relative to the limiting groove.

[0008] As a further feature of the above solution, an extension rod is also included, with polygonal insertion slots and insertion rods at both ends of the extension rod for connecting the sleeve and the connecting rod.

[0009] As a further provision of the above scheme, the secondary cutting edge and the primary cutting edge are alternately arranged on the drill bit body, and the secondary cutting edge extends out relative to the primary cutting edge.

[0010] As a further feature of the above scheme, the main cutting edge is inclined on one side of the chip groove, and the inclined direction of the main cutting edge is set to extend obliquely upward in the direction of drill rotation.

[0011] Beneficial effects: Compared with existing technologies, the double-edged flat-blade drill of this utility model uses a secondary cutting edge to assist the main cutting edge, performing a secondary cutting process on the bottom surface of the main borehole, reducing drilling difficulty. Furthermore, the combination with the circumferential cutting edge can improve the processing quality. The adapter settings of the sleeve, connecting rod and extension rod can be freely extended to process deep space. In addition, the flat-blade drill of this embodiment adopts the method of welding the cutting edge to the drill bit. For the drill bit, if the cutting edge is damaged after use, it can be heated to detach and replace it with a new edge, thus extending its service life and reducing waste. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the double-bladed flat-wing drill of this utility model.

[0013] Figure 2 This is a schematic diagram of the drill shank structure in this embodiment.

[0014] Figure 3 This is a schematic diagram of the drill bit structure in this embodiment.

[0015] Reference numerals: 1. Drill bit; 11. Drill tip; 12. Circumferential cutting edge; 13. Main cutting edge; 14. Secondary cutting edge; 15. Chip flute; 2. Drill shank; 21. Sleeve; 22. Connecting rod; 23. Polygonal insertion slot; 24. Insert rod; 25. Radial fixing hole; 26. Limiting groove; 4. Extension rod. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1-3The double-bladed flat-wing drill shown includes a drill bit 1 and a drill shank 2. The drill bit 1 is provided with a drill tip 11, a circumferential cutting edge 12, a main cutting edge 13 and a secondary cutting edge 14. The drill bit 1 is provided with a chip removal groove 15 relative to the main cutting edge 13. The drill shank 2 includes a sleeve 21 fixedly extended from the drill bit 1 and a connecting rod 22 circumferentially linked relative to the sleeve 21. One end of the connecting rod 22 is inserted into the sleeve 21, and the other end is used to connect to the electric drill gun.

[0018] As a further provision of the above solution, the sleeve 21 is provided with a polygonal insertion groove 23, and the connecting rod 22 is provided with an insertion rod 24 opposite to the polygonal insertion groove 23.

[0019] As a further feature of the above scheme, the sleeve 21 is provided with a radial fixing hole 25 relative to the polygonal insertion groove 23, and the insertion rod 24 is provided with a limiting groove 26, with the radial fixing hole 25 positioned relative to the limiting groove 26.

[0020] As a further feature of the above solution, an extension rod 4 is also included. The two ends of the extension rod 4 are respectively provided with polygonal insertion slots 23 and insertion rods 24 for connecting the sleeve 21 and the connecting rod 22.

[0021] As a further provision of the above scheme, the secondary cutting edge 14 and the main cutting edge 13 are alternately arranged on the body of the drill bit 1, and the secondary cutting edge 14 extends outward relative to the main cutting edge 13.

[0022] As a further feature of the above scheme, the main cutting edge 13 is inclined on one side of the chip groove 15, and the inclined direction of the main cutting edge 13 is set to extend obliquely upward in the rotation direction of the drill bit 1.

[0023] refer to Figure 1-3 The illustrated double-bladed flat-wing drill includes a drill bit 1 and a drill shank 2. In this embodiment, the drill bit 1 is provided with a drill tip 11, a circumferential cutting edge 12, a main cutting edge 13, and a secondary cutting edge 14. The drill bit 1 has a chip groove 15 relative to the main cutting edge 13. The main cutting edge 13 is inclined on one side of the chip groove 15, and the inclination direction of the main cutting edge 13 is set to extend obliquely upward in the rotation direction of the drill bit 1. During drilling, the rotating main cutting edge 13 cuts the wood at the bottom of the hole, and the cut waste is quickly discharged from the chip groove 15 along the inclined main cutting edge 13. In this embodiment, the drill shank 2 is fixedly extended from the drill bit 1 with a sleeve 21 and a connecting rod 22 that is circumferentially linked to the sleeve 21. One end of the connecting rod 22 is inserted into the sleeve 21, and the other end is used to connect to the electric drill gun. One end of the connecting rod 22 is inserted into the electric drill gun, and the other end is circumferentially fixedly connected to the sleeve 21. The electric drill gun drives the connecting rod 22 to drive the drill bit 1 to process the wood.

[0024] Furthermore, in this embodiment, the circumferential cutting edge 12 is located on the outer side of the drill bit 1 and can cut and smooth the hole side, so that the circumferential surface of the drilled cylindrical hole is flat.

[0025] Furthermore, in this embodiment, the sleeve 21 is provided with a polygonal insertion groove 23, and the connecting rod 22 is provided with an insertion rod 24 opposite to the polygonal insertion groove 23. The sleeve 21 is provided with a radial fixing hole 25 opposite to the polygonal insertion groove 23, and the insertion rod 24 is provided with a limiting groove 26. The radial fixing hole 25 is provided opposite to the limiting groove 26. It also includes an extension rod 4. The two ends of the extension rod 4 are respectively provided with a polygonal insertion groove 23 and an insertion rod 24 for connecting the sleeve 21 and the connecting rod 22. In this embodiment, the flat-blade drill extends and connects the drill shank 2 and the connecting rod 22 by setting the extension rod 4. This structure allows the flat-blade drill to penetrate deeper into the target and process deeper holes as needed.

[0026] Furthermore, in this embodiment, the circumferential cutting edge 12, the main cutting edge 13, and the secondary cutting edge 14 provided on the drill bit 1 are all fixed by welding. When they are damaged, the user can use welding equipment to heat them, so that the welding liquid material connected to them melts at high temperature, remove the old cutting edge, and replace it with a new cutting edge, so that the drill tip 11, drill shank 2, etc. can be reused multiple times, saving resources.

[0027] As a further provision of the above scheme, the secondary cutting edge 14 and the main cutting edge 13 are alternately arranged on the body of the drill bit 1, and the secondary cutting edge 14 extends outward relative to the main cutting edge 13. In this embodiment, when the drill bit 1 is working, the secondary cutting edge 14 protrudes relative to the main cutting edge 13 and cuts the bottom of the target hole when rotating at high speed. Then, the main cutting edge 13 drills deep into the bottom surface of the hole that has been damaged by the secondary cutting edge 14, cutting and drilling layer by layer. The secondary cutting edge 14 can damage the bottom of the hole before the main cutting edge 13 cuts, reducing the difficulty of drilling and cutting and improving the processing capability.

[0028] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A double-edge flat wing drill characterized by: The utility model relates to a drill bit (1) and a drill handle (2), the drill bit (1) is provided with drill tip (11), circumferential cutting edge (12), main cutting edge (13) and secondary cutting edge (14), the drill bit (1) is provided with chip flute (15) relative to main cutting edge (13), the drill handle (2) includes sleeve (21) fixedly extended by drill bit (1) and the connecting rod (22) relative to sleeve (21) circumferential linkage, the connecting rod (22) one end inserts sleeve (21), the other end is used for connecting electric drill gun.

2. A double edge flat wing drill according to claim 1 wherein: The sleeve (21) is provided with a polygonal insertion slot (23), and the connecting rod (22) is provided with an insertion rod (24) opposite to the polygonal insertion slot (23).

3. A double edge flat wing drill according to claim 2, wherein: The sleeve (21) is provided with a radial fixing hole (25) opposite to the polygonal insertion slot (23), and the insertion rod (24) is provided with a limiting slot (26), and the radial fixing hole (25) is opposite to the limiting slot (26).

4. A double edge flat wing drill according to claim 2 wherein: The utility model further includes an extension rod (4), and the extension rod (4) is provided with a polygonal insertion slot (23) and an insertion rod (24) at two ends respectively, and is used for connecting the sleeve (21) and the connecting rod (22).

5. A double edge flat wing drill according to claim 1 wherein: The secondary cutting edge (14) and the main cutting edge (13) are alternately arranged on the drill bit (1) body, and the secondary cutting edge (14) is arranged to protrude relative to the main cutting edge (13).

6. A double edge flat wing drill according to claim 1 wherein: The main cutting edge (13) is arranged to be inclined on one side of the chip flute (15), and the inclination direction of the main cutting edge (13) is arranged to extend obliquely upward along the rotation direction of the drill bit (1).

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