Step drill
The innovative drill design with a guide block and angled waste channels addresses drilling instability by ensuring three-point contact and balanced force distribution, enhancing stability during hole drilling.
Patent Information
- Application Number
- CN202421680580.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing step drills are prone to violent shaking during the moment of perforation, resulting in unstable hole processing.
A step drill is designed, including a guide block, a first cutting edge, a second cutting edge, a first chip receptacle and a second chip receptacle, and the angle between the first chip receptacle and the second chip receptacle is not 180°, achieving three-point contact and stress balance.
Improve the stability of the hole processing and stress balance of the step drill, and reduce the instantaneous shaking of the perforation.
Smart Images
Figure CN223098078U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hole processing tool, in particular to a stepped drill. Background Art
[0002] A stepped drill is a hole processing tool that facilitates changing the diameter of a processed hole, and is mainly used for hole processing of thin steel plates, having the advantage of facilitating hole processing.
[0003] Related stepped drills are generally used in cooperation with handheld electric drills. However, due to poor hole processing stability of related stepped drills, violent shaking is likely to occur at the moment of piercing. Summary of the Utility Model
[0004] Purpose of the Utility Model: The purpose of the utility model is to provide a stepped drill that is not likely to shake violently at the moment of piercing.
[0005] Technical Solution: A stepped drill includes:
[0006] A drill body;
[0007] A first cutting edge and a second cutting edge both provided on the drill body;
[0008] Wherein, along the rotation direction of the drill body, a guide block, a first chip groove, and a second chip groove are sequentially provided on the drill body. The first cutting edge communicates with the first chip groove, the second cutting edge communicates with the second chip groove, and a first angle ɑ1 between the first chip groove and the second chip groove is not 180°.
[0009] Optionally, the drill body includes:
[0010] A cutting body;
[0011] A drill tip connected to one end of the cutting body;
[0012] A shank connected to the other end of the cutting body;
[0013] Wherein, the first cutting edge, the second cutting edge, the guide block, the first chip groove, and the second chip groove are all provided on the cutting body.
[0014] Optionally, the connection mode between one end of the cutting body and the drill tip is integrally formed connection.
[0015] Optionally, the shank is a triangular shank, a straight shank, or a hexagonal shank.
[0016] Optionally, the first angle ɑ1 between the first chip groove and the second chip groove is greater than 120° and less than 160°.
[0017] Optionally, a second angle ɑ2 between the first chip groove and the guide block is equal to a third angle ɑ3 between the second chip groove and the guide block.
[0018] Optionally, in the same radial cross-section, the outermost sides of the guide block, the first chip groove, and the second chip groove are located on the same circle.
[0019] Optionally, the connection between the guide block and the drill body is an integrally formed connection.
[0020] Beneficial effects: The guide block, the first cutting edge, and the second cutting edge facilitate the realization of three-point contact between the step drill of the present application and the workpiece to be machined, and facilitate the good stability of the hole machining of the step drill of the present application. Since along the rotation direction of the drill body, the guide block, the first chip groove, and the second chip groove are sequentially arranged on the drill body, and the first angle ɑ between the first chip groove and the second chip groove is not 180°, which is equivalent to that along the rotation direction of the drill body, the guide block, the first cutting edge, and the second cutting edge are sequentially arranged on the drill body, and the angle between the first cutting edge and the second cutting edge is not 180°, which facilitates the direction of the force exerted on the guide block by the workpiece to be machined to be opposite to the resultant force direction of the forces exerted on the first cutting edge and the second cutting edge by the workpiece to be machined, so as to facilitate the good force balance of the step drill of the present application, and further facilitate that during the piercing moment, violent shaking is not likely to occur. Description of the Drawings
[0021] Figure 1 is one of the structural schematic diagrams of a step drill of the present invention;
[0022] Figure 2 is the second structural schematic diagram of a step drill of the present invention;
[0023] In the figure: 1, drill body; 11, cutting body; 12, drill tip; 13, shank; 21, first cutting edge; 22, second cutting edge; 3, guide block; 41, first chip groove; 42, second chip groove. Detailed Embodiments
[0024] To make the technical solutions of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
[0025] Embodiment 1
[0026] Combined with Figure 1-2, this embodiment provides a step drill, including: a drill body 1; a first cutting edge 21 and a second cutting edge 22 both provided on the drill body 1; wherein, along the rotation direction of the drill body 1, a guide block 3, a first chip groove 41, and a second chip groove 42 are sequentially provided on the drill body 1. The first cutting edge 21 communicates with the first chip groove 41, the second cutting edge 22 communicates with the second chip groove 42, and the first angle ɑ1 between the first chip groove 41 and the second chip groove 42 is not 180°.
[0027] Specifically, the drill body 1 is used to carry the first cutting edge 21, the second cutting edge 22, the guide block 3, the first chip groove 41, and the second chip groove 42, etc.; both the first cutting edge 21 and the second cutting edge 22 are used for cutting; the first chip groove 41 is used to discharge the waste chips from the first cutting edge 21, and the second chip groove 42 is used to discharge the waste chips from the second cutting edge 22; the guide block 3, the first cutting edge 21, and the second cutting edge 22 facilitate making the three-point contact between the step drill of the present application and the workpiece to be machined, and facilitate making the hole machining stability of the step drill of the present application good. Since along the rotation direction of the drill body 1, the guide block 3, the first chip groove 41, and the second chip groove 42 are sequentially provided on the drill body 1, and the first angle ɑ1 between the first chip groove 41 and the second chip groove 42 is not 180°, it is equivalent to that along the rotation direction of the drill body 1, the guide block 3, the first cutting edge 21, and the second cutting edge 22 are sequentially provided on the drill body 1, and the angle between the first cutting edge 21 and the second cutting edge 22 is not 180°, which facilitates making the acting force direction of the guide block 3 received by the workpiece to be machined opposite to the resultant force direction of the acting forces received by the first cutting edge 21 and the second cutting edge 22 from the workpiece to be machined, so as to facilitate making the force balance of the step drill of the present application good, and further facilitate that during the perforation instant, it is not easy to occur violent shaking.
[0028] Furthermore, as Figure 1-2 , the drill body 1 includes: a cutting body 11; a drill tip 12 connected to one end of the cutting body 11; a shank 13 connected to the other end of the cutting body 11; wherein, the first cutting edge 21, the second cutting edge 22, the guide block 3, the first chip groove 41, and the second chip groove 42 are all provided on the cutting body 11.
[0029] Specifically, the cutting body 11 is used to carry the drill tip 12, the shank 13, etc., and the cutting body 11 is used for cutting; the drill tip 12 is used for centering; the shank 13 is used to cooperate with drilling equipment such as a hand-held electric drill.
[0030] Furthermore, as Figure 1 , the connection mode between one end of the cutting body 11 and the drill tip 12 is integrally formed connection, and the integrally formed connection facilitates making the integrity of one end of the cutting body 11 and the drill tip 12 good.
[0031] Furthermore, as Figure 1-2, the shank 13 is a triangular shank, a straight shank or a hexagonal shank.
[0032] Furthermore, as Figure 2 , the first angle ɑ1 between the first chip groove 41 and the second chip groove 42 is greater than 120° and less than 160°. The first angle ɑ1 between the first chip groove 41 and the second chip groove 42 can specifically be 130°, 140° or 150°, etc.
[0033] Furthermore, as Figure 2 , the second angle ɑ2 between the first chip groove 41 and the guide block 3 is equal to the third angle ɑ3 between the second chip groove 42 and the guide block 3. The equality of the second angle ɑ2 and the third angle ɑ3 is conducive to making the force symmetry of the stepped drill of the present application good.
[0034] Furthermore, as Figure 2 , in the same radial section, the outermost side of the guide block 3, the outermost side of the first chip groove 41 and the outermost side of the second chip groove 42 are located on the same circle. Being located on the same circle is conducive to making the roundness of the hole machined by the stepped drill of the present application better.
[0035] Furthermore, as Figure 1-2 , the connection mode between the guide block 3 and the drill body 1 is integrally formed connection. The integrally formed connection is conducive to making the integrity of the guide block 3 and the drill body 1 good.
[0036] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.
Claims
1. A step drill, characterized in that, Comprising: Drill body; A first cutting edge and a second cutting edge both provided on the drill body; Wherein, along the rotation direction of the drill body, a guide block, a first chip flute and a second chip flute are sequentially provided on the drill body. The first cutting edge communicates with the first chip flute, the second cutting edge communicates with the second chip flute, and a first angle ɑ1 between the first chip flute and the second chip flute is not 180°.
2. The stepped drill according to claim 1, characterized in that, The drill body includes: Cutting body; Drill tip connected to one end of the cutting body; Shank connected to the other end of the cutting body; Wherein, the first cutting edge, the second cutting edge, the guide block, the first chip flute and the second chip flute are all provided on the cutting body.
3. The step drill according to claim 2, characterized in that, The connection mode between one end of the cutting body and the drill tip is integrally formed connection.
4. A step drill according to claim 2, wherein, The shank is a triangular shank, a straight shank or a hexagonal shank.
5. A step drill according to any one of claims 1-4, characterized in that, The first angle ɑ1 between the first chip flute and the second chip flute is greater than 120° and less than 160°.
6. A step drill according to any one of claims 1-4, characterized in that A second angle ɑ2 between the first chip flute and the guide block is equal to a third angle ɑ3 between the second chip flute and the guide block.
7. A step drill according to any one of claims 1-4, characterized in that, In the same radial cross-section, the outermost sides of the guide block, the outermost side of the first chip flute and the outermost side of the second chip flute are located on the same circle.
8. A step drill according to any one of claims 1-4, characterized in that The connection mode between the guide block and the drill body is integrally formed connection.