Drill and reamer integrated tool

Abstract

The utility model belongs to the technical field of drill bit, specifically relates to a drill and reamer integrated cutter, the utility model discloses a drill and reamer integrated cutter includes: by front to back setting in proper order drill tip, cutting edge, chamfer blade, guide blade and first blade zone, the included angle alpha between upper and lower guide blades is less than the included angle between upper and lower chamfer blades, the included angle alpha between upper and lower guide blades is 2~4. The utility model discloses a drill and reamer integrated cutter sets up the specific guide structure at the blade zone front end of drill bit, realizes disposable drilling and can obtain high-precision hole, avoids the dependence on reamer in traditional craft to improve machining efficiency significantly, reduce cost, guarantee the geometric precision and surface quality of hole simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of drill bit technology, specifically relating to a drill-reamer integrated tool. Background Technology

[0002] Currently, the machining of high-precision holes in metal processing typically employs a two-step method: drilling and reaming. In the drilling stage, a conventional drill bit is used to form the basic hole shape. In the reaming stage, a reamer is used to enlarge and refine the hole diameter to achieve higher dimensional accuracy and surface finish.

[0003] However, while existing methods can meet the requirements for aperture accuracy, they have the following problems: First, the process is complicated, requiring two steps: drilling and reaming, resulting in low processing efficiency and a long cycle time. Secondly, there are many types of cutting tools, requiring drills and reamers, which increases the number of cutting tools and management costs. Third, the hole diameter is prone to shrinkage, enlargement, and unstable positional accuracy. Specifically, after drilling with a conventional drill bit, the hole diameter is prone to shrinkage or enlargement, leading to unstable accuracy. In addition, high surface finish cannot be achieved by drilling alone, and reaming is necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a drilling and reaming integrated tool to solve the technical problem that the machining of high-precision holes in the prior art requires the use of multiple tools such as drilling tools and reamers, which results in cumbersome procedures and high tool costs.

[0005] This application provides a drill-reamer integrated tool, comprising: a drill tip, a cutting edge, a chamfering edge, a guide edge, and a first cutting edge arranged sequentially from front to back; The included angle α between the upper and lower guide blades is smaller than the included angle between the upper and lower chamfering blades; The included angle α between the upper and lower guide blades is 2° to 4°.

[0006] In one embodiment of this application, a boundary line is formed at the connection between the rear end of the guide blade and the front end of the first blade strip; The lower end of the boundary line is inclined forward, with an inclination angle β of 0° to 20°.

[0007] In one embodiment of this application, the distance from the rear end of the guide blade to the tool axis is 0.005 to 0.02 mm greater than the distance from the front end to the tool axis.

[0008] In one embodiment of this application, the outer periphery of the cutting tool is provided with other cutting edges besides the first cutting edge; The distance from the front end of the other cutting edge to the rear end of the guide edge is not less than 0.1 mm.

[0009] In one embodiment of this application, the cutting tool has a taper of 0.02 to 0.4 / 100.

[0010] The beneficial effects of this utility model are: Unlike existing technologies, this application provides a drill-reamer integrated tool, comprising: a drill tip, a cutting edge, a chamfering edge, a guide edge, and a first cutting edge arranged sequentially from front to back; the included angle α between the upper and lower guide edges is smaller than the included angle between the upper and lower chamfering edges; the included angle α between the upper and lower guide edges is 2° to 4°. This utility model's drill-reamer integrated tool, by setting a specific guiding structure at the front end of the drill bit's cutting edge, enables the generation of high-precision holes in a single drilling operation, avoiding the reliance on reamers in traditional processes, thereby significantly improving processing efficiency, reducing costs, and simultaneously ensuring the geometric accuracy and surface quality of the hole.

[0011] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0012] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a side view of a preferred embodiment of the drill-reamer integrated tool of this utility model; Figure 2 This is an enlarged schematic diagram of the guide blade of a preferred embodiment of the present invention.

[0015] In the picture: 1. Drill tip; 2. Cutting edge; 3. Chamfering edge; 4. Guide edge; 5. Boundary line; 6. First cutting edge; 7. Other cutting edges. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] This application provides a drilling and reaming integrated tool, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0018] See Figure 1 and Figure 2 In one embodiment, the drill-reamer tool includes: a drill tip 1, a cutting edge 2, a chamfering edge 3, a guide edge 4, and a first cutting edge 5 arranged sequentially from front to back; the included angle α between the upper and lower guide edges 4 is smaller than the included angle between the upper and lower chamfering edges 3; the included angle α between the upper and lower guide edges 4 is 2° to 4°.

[0019] In this embodiment, the integrated drilling and reaming tool of this utility model achieves high-precision hole in one drilling operation by setting a specific guiding structure, namely chamfering edge 3 and guide edge 4, at the front end of the first cutting edge 5. This avoids the dependence on reamer in traditional processes, thereby significantly improving processing efficiency, reducing costs, and ensuring the geometric accuracy and surface quality of the hole.

[0020] In this embodiment, the surface on which each guide blade 4 is located is a conical surface.

[0021] In this embodiment, optionally, see [link to relevant documentation]. Figure 2 A boundary line 41 is formed at the connection between the rear end of the guide blade 4 and the front end of the first blade strip 5; the lower end of the boundary line 41 is inclined forward, and the inclination angle β is 0° to 20°.

[0022] In this embodiment, optionally, the distance from the rear end of the guide blade 4 to the tool axis is 0.005 to 0.02 mm greater than the distance from the front end to the tool axis, i.e., point B in the figure.

[0023] In this embodiment, optionally, the outer periphery of the tool is provided with other cutting edges 6 besides the first cutting edge 5, all of which can be spirally arranged on the outer periphery of the tool; wherein, the distance from the front end of the other cutting edge 6 to the rear end of the guide edge 4 is not less than 0.1mm, i.e., point A in the figure.

[0024] In this embodiment, optionally, the cutting tool has a taper of 0.02 to 0.4 / 100.

[0025] In this embodiment, the guide blade 4 can effectively guide the tool into the workpiece, reduce runout, and improve the hole position accuracy; the chamfering blade 3 and the guide blade 4 structure produce a slight squeezing and finishing effect on the hole wall during the processing, which can improve the surface finish of the hole wall and stabilize the hole diameter; and, it can achieve the same precision effect as reaming in one drilling operation, eliminating the need for subsequent reaming processes.

[0026] In one application scenario, using the integrated drilling and reaming tool of this utility model to machine holes has the following effects: 1. Hole diameter accuracy: Hole diameter accuracy can reach within IT8; 2. Surface finish: The surface roughness of the holes is consistently within Ra0.4; 3. Geometric accuracy: Roundness and cylindricity can be controlled within 3 μm; 4. Positional accuracy: The hole positional accuracy can be maintained within 0.01 mm; 5. Burr control: Burr height at the orifice ≤ 0.05 mm; 6. Overall advantages: Enables high-precision and high-efficiency hole machining, halving tool costs and machining time, suitable for high-precision molds, aerospace parts and precision machining fields.

[0027] It should be noted that all the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0028] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification.

Claims

1. A drilling and reaming integrated tool, characterized in that, include: The drill tip (1), cutting edge (2), chamfering edge (3), guide edge (4) and first cutting edge (5) are arranged sequentially from front to back; The included angle α between the upper and lower guide blades (4) is smaller than the included angle between the upper and lower chamfering blades (3); The included angle α between the upper and lower guide blades (4) is 2° to 4°.

2. The drilling and reaming integrated tool according to claim 1, characterized in that, A boundary line (41) is formed at the connection between the rear end of the guide blade (4) and the front end of the first blade strip (5). The lower end of the boundary line (41) is inclined forward, with an inclination angle β of 0° to 20°.

3. The drilling and reaming integrated tool according to claim 1, characterized in that, The distance from the rear end of the guide blade (4) to the tool axis is 0.005 to 0.02 mm greater than the distance from the front end to the tool axis.

4. The drilling and reaming integrated tool according to claim 1, characterized in that, The outer periphery of the cutting tool is provided with other cutting edges (6) besides the first cutting edge (5); The distance from the front end of the other cutting edge (6) to the rear end of the guide edge (4) is not less than 0.1 mm.

5. The drilling and reaming integrated tool according to claim 1, characterized in that, The cutting tool has a taper of 0.02 to 0.4 / 100.

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