A type of hole-cutting tool

Abstract

A hole-opening tool includes: a shank, a first chip-removing groove, a first neck, a first cutting edge, a second chip-removing groove, a second neck, and a second cutting edge. The shank has the first chip-removing groove, first neck, first cutting edge, second chip-removing groove, second neck, and second cutting edge at its top end. The first chip-removing groove, first neck, and first cutting edge are diagonally symmetrically distributed with respect to the second chip-removing groove, second neck, and second cutting edge about the tool's center point. One side of the first chip-removing groove connects to the outer side of the first neck, and the other side connects to the inner side of the second neck and second cutting edge. Similarly, one side of the second chip-removing groove connects to the outer side of the second neck, and the other side connects to the inner side of the first neck and first cutting edge. Compared with traditional technologies, this invention employs a diagonally symmetrical two-set blade structure, enabling rapid hole-opening operations and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to a hole-drilling tool. Background Technology

[0002] Traditional cutting tools require external guide sleeves or pre-drilled holes for positioning when drilling. As the tool rotates, it cuts into the material through axial pressure, gradually forming a hole. Simultaneously, high-pressure coolant is needed to force chips out of the hole. Furthermore, the feed rate must be strictly controlled; too high a rate accelerates tool wear, while too low a rate reduces efficiency. This method suffers from several drawbacks. Traditional cutting tools have poor structural rigidity, making them prone to uneven cutting forces that can lead to hole axis misalignment or excessive ellipticity when machining deep holes. Chips tend to form ribbon-like or spiral-shaped adhesions, requiring a powerful cooling system to prevent scratching the hole wall or tool breakage. Wear is concentrated on the main cutting edge, especially when machining hard materials, where the cutting edge is prone to chipping or crater wear. Finally, there is the problem of low efficiency, being time-consuming and material-intensive.

[0003] To address the aforementioned issues, we have made a series of improvements. Utility Model Content

[0004] The purpose of this utility model is to provide a hole-drilling tool to overcome the above-mentioned shortcomings and deficiencies of the prior art.

[0005] A socketing tool includes: a shank, a first chip removal groove, a first neck, a first cutting edge, a second chip removal groove, a second neck, and a second cutting edge. The top of the shank is provided with the first chip removal groove, the first neck, the first cutting edge, the second chip removal groove, the second neck, and the second cutting edge. The first chip removal groove, the first neck, and the first cutting edge are diagonally symmetrically distributed with respect to the center point of the tool. One side of the first chip removal groove is connected to the outer side of the first neck, and the other side of the first chip removal groove is connected to the inner side of the second neck and the second cutting edge. One side of the second chip removal groove is connected to the outer side of the second neck, and the other side of the second chip removal groove is connected to the inner side of the first neck and the first cutting edge.

[0006] Furthermore, the first cutting edge and the second cutting edge have the same structure and parameters. The rake angle of the first cutting edge is 3°, the clearance angle of the first cutting edge is 3°, the entry angle of the first cutting edge is 1°, the helix angle of the first cutting edge is 0.1°, the chamfer of the first cutting edge is 0.2°, and the radius of the arc of the first cutting edge is 2.5mm.

[0007] The beneficial effects of this utility model are:

[0008] Compared with traditional technology, this utility model adopts a diagonally symmetrical two-set blade structure, which can quickly perform hole-opening operations and improve production efficiency. Attached image description:

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 This is a top-view structural diagram of the present invention.

[0011] Figure 3 This is a side view structural diagram of the present invention.

[0012] Figure label:

[0013] Tool holder 100, first chip removal groove 200, first blade neck 300, first cutting edge 400, second chip removal groove 500, second blade neck 600, and second cutting edge 700. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0015] Example 1

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a top-view structural diagram of the present invention. Figure 3 This is a side view structural diagram of the present invention.

[0017] like Figure 1-3 As shown, a socketing tool includes: a shank 100, a first chip removal groove 200, a first cutting neck 300, a first cutting edge 400, a second chip removal groove 500, a second cutting neck 600, and a second cutting edge 700. The top end of the shank 100 is provided with the first chip removal groove 200, the first cutting neck 300, the first cutting edge 400, the second chip removal groove 500, the second cutting neck 600, and the second cutting edge 700. The second chip removal groove 500, the second neck 600, and the second cutting edge 700 are diagonally symmetrically distributed with respect to the center point of the tool. One side of the first chip removal groove 200 is connected to the outer side of the first neck 300, and the other side of the first chip removal groove 200 is connected to the inner side of the second neck 600 and the second cutting edge 700. One side of the second chip removal groove 500 is connected to the outer side of the second neck 600, and the other side of the second chip removal groove 500 is connected to the inner side of the first neck 300 and the first cutting edge 400.

[0018] The first cutting edge 400 and the second cutting edge 700 have the same structure and parameters. The rake angle of the first cutting edge 400 is 3°, the clearance angle of the first cutting edge 400 is 3°, the entry angle of the first cutting edge 400 is 1°, the helix angle of the first cutting edge 400 is 0.1°, the chamfer of the first cutting edge 400 is 0.2°, and the radius of the arc of the first cutting edge 400 is 2.5mm.

[0019] The core design of this invention is a double-edged design achieved through two identical sets of cutting edge structures and corresponding components that are symmetrically arranged diagonally around the axis center. This is a significant difference from the traditional single-edged design.

[0020] The first cutting edge 400 and the second cutting edge 700 are diagonally symmetrical in position, with their first neck 300 and second neck 600 filling the gap between them. Therefore, when drilling a product, drilling can be achieved by rotating the cutter head, forming a complete circumferential cutting path during rotation. This design allows the tool to automatically center itself upon entering the material, without relying on external guide sleeves or pre-drilling.

[0021] Balanced cutting force distribution: Traditional cutting tools, due to their single cutting edge, result in uneven cutting force, which can easily cause hole axis misalignment. In contrast, the two cutting edges of this invention balance the cutting forces during machining, significantly improving machining accuracy and hole roundness.

[0022] Effective chip removal mechanism: The first chip removal groove 200 and the second chip removal groove 500 are connected to the outer side of their respective tool necks, and also to the inner side of the opposite cutting unit, forming a highly efficient chip removal channel. This channel design allows chips to be discharged more smoothly, reducing the risk of chip entanglement and adhesion. Due to the improved chip removal efficiency, the dependence on high-pressure coolant is greatly reduced, lowering the risk of scratching the hole wall and tool breakage. Distributed cutting load: Wear is no longer concentrated on a single cutting edge, but is distributed across both cutting edges, extending tool life and reducing chipping and crater wear.

[0023] Improved cutting efficiency: Simultaneous cutting with two cutting edges significantly improves machining efficiency, reducing machining time and material consumption.

[0024] The process of using this invention is as follows: After the tool rotates, the two cutting edges draw a complete circle in space. When the machining equipment applies axial pressure, the cutting edges begin to cut into the material. As the tool feeds, the two symmetrical cutting edges work together to gradually form a circular hole. The chips are smoothly discharged through the specially designed chip removal groove. Due to the balanced cutting force, the accuracy and quality of the hole are guaranteed.

[0025] Compared with traditional technology, this utility model adopts a diagonally symmetrical two-set blade structure, which can quickly perform hole-opening operations and improve production efficiency.

[0026] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.

Claims

1. A pilot hole cutter, characterized in that, include: The tool holder (100) comprises a first chip removal groove (200), a first cutting neck (300), a first cutting edge (400), a second chip removal groove (500), a second cutting neck (600), and a second cutting edge (700). The top of the tool holder (100) is provided with the first chip removal groove (200), the first cutting neck (300), the first cutting edge (400), the second chip removal groove (500), the second cutting neck (600), and the second cutting edge (700). The first chip removal groove (200), the first cutting neck (300), and the first cutting edge (400) are connected to the second chip removal groove (600). The chip groove (500), the second cutter neck (600), and the second cutting edge (700) are diagonally symmetrical about the center point of the tool. One side of the first chip groove (200) is connected to the outer side of the first cutter neck (300), and the other side of the first chip groove (200) is connected to the inner side of the second cutter neck (600) and the second cutting edge (700). One side of the second chip groove (500) is connected to the outer side of the second cutter neck (600), and the other side of the second chip groove (500) is connected to the inner side of the first cutter neck (300) and the first cutting edge (400).

2. A pilot hole cutter according to claim 1 wherein, The first cutting edge (400) and the second cutting edge (700) have the same structure and parameters. The rake angle of the first cutting edge (400) is 3°, the clearance angle of the first cutting edge (400) is 3°, the entry angle of the first cutting edge (400) is 1°, the helix angle of the first cutting edge (400) is 0.1°, the chamfer of the first cutting edge (400) is 0.2°, and the radius of the arc of the first cutting edge (400) is 2.5mm.

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