Composite drilling reamer with chip separating grooves
By setting chip splitting grooves on the toothed structure of the composite drilling reamer to form a secondary cutting edge, the problems of flying wire and burrs during the processing of carbon fiber composite materials are solved, and efficient fiber cutting and smooth hole walls are achieved.
Patent Information
- Application Number
- CN202422426877.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-08
AI Technical Summary
During the processing of carbon fiber composite materials, such as fly wire, burrs, burrs and fiber bundle tearing at the inlet and outlet, which is difficult to effectively remove.
A composite drill reamer with chip splitting groove is designed, with chip splitting grooves on the toothed structure to form a secondary cutting edge for secondary cutting of fiber bundles that are not completely cut, ensuring cutting continuity and smooth hole walls.
Effectively removes flying wire, burrs and fiber bundle tear during the processing of carbon fiber composite materials to ensure processing quality.
Smart Images
Figure CN223278038U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cutting tools, and in particular relates to a composite drill reamer with a chip dividing groove. Background Art
[0002] Carbon fiber composites are lightweight, high-strength, and corrosion-resistant; compared to traditional metal materials, they offer significant advantages in density and strength. However, due to the high stiffness of their fiber bundles, carbon fiber composites are difficult to process, often leaving uncut, hard fiber strands (also known as flywires) at the inlet and outlet. Utility Model Content
[0003] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention aims to provide a composite drill reamer with chip dividing grooves.
[0004] The technical solution adopted by this utility model is:
[0005] A composite drill reamer with a chip dividing groove comprises four tooth-shaped structures arranged circumferentially, the front ends of the four tooth-shaped structures intersecting at the drill tip, the first tooth-shaped structure and the third tooth-shaped structure being provided with a main cutting edge and a reaming segment from front to back; the second tooth-shaped structure and the fourth tooth-shaped structure being provided with a reaming segment, the reaming segments being provided with a chip dividing groove, and a secondary cutting edge being formed on one side of the chip dividing groove.
[0006] Preferably, the chip groove positions of the first tooth-shaped structure and the third tooth-shaped structure are the same, the chip groove positions of the second tooth-shaped structure and the fourth tooth-shaped structure are the same, and the chip groove positions of the first tooth-shaped structure and the chip groove positions of the second tooth-shaped structure are staggered.
[0007] Preferably, the rear ends of the tooth-shaped structures are connected to the cutting edge. Grooves are formed between adjacent tooth-shaped structures. The top angle of the drill tip is 90°.
[0008] The beneficial effects of the utility model are:
[0009] The composite drill reamer with chip grooves provided by the utility model has chip grooves on the reaming section. The chip grooves with back angles form auxiliary cutting edges. The auxiliary cutting edges can re-cut the residual hard fiber bundles that have not been completely cut off, ensuring that there are no flying wires, burrs, burrs, fiber bundle tearing and other defects at the entrance and exit of the carbon fiber composite material. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the composite drill reamer with chip dividing grooves of the utility model.
[0011] Figure 2 yes Figure 1 Enlarged cross-sectional view of AA in the middle.
[0012] Figure 3 It is a partial schematic diagram of the second tooth-shaped structure of the present invention.
[0013] Figure 4 It is a partial schematic diagram of the third tooth-shaped structure of the present invention.
[0014] Figure 5 yes Figure 4 Enlarged cross-sectional view of EE.
[0015] In the figure: 1-first tooth structure; 2-second tooth structure; 3-third tooth structure; 4-fourth tooth structure; 5-drill tip; 6-main cutting edge; 7-reaming section; 8-chip groove; 9-secondary cutting edge; 10-edge band; 11-groove. DETAILED DESCRIPTION
[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention and are not to be construed as limiting the present invention. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in a variety of different configurations.
[0017] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components.
[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0019] like Figures 1 to 5 As shown, the composite drill reamer with chip grooves of this embodiment includes four tooth structures arranged circumferentially. The four tooth structures are respectively a first tooth structure 1, a second tooth structure 2, a third tooth structure 3 and a fourth tooth structure 4 in a clockwise direction. The front ends of the four tooth structures intersect at a drill tip 5. The top angle of the drill tip 5 is 90°, which is conducive to carbon fiber cutting, can reduce axial force, and make cutting light.
[0020] The first and third tooth structures 1 and 3 are equipped, from front to back, with a main cutting edge 6 and a reaming segment 7. The main cutting edge 6 is relatively short and therefore performs limited tasks, while the reaming segment 7, with its narrow angle and longer cutting edge, handles the majority of the cutting work. The second and fourth tooth structures 2 and 4 are both equipped with reaming segments 7. The locations of the second and fourth tooth structures 2 and 4 relative to the main cutting edges 6 of the first and third tooth structures 1 and 3 do not perform any cutting function.
[0021] The reaming sections 7 are all provided with chip grooves 8, and the chip grooves 8 with back angles form secondary cutting edges 9. The back of the secondary cutting edges 9 can provide support and reduce friction on the hole wall; the secondary cutting edges 9 can secondary cut off the residual hard fiber bundles that have not been completely cut off, ensuring that there are no flying wires, burrs, burrs, fiber bundle tearing and other defects at the entrance and exit of the carbon fiber composite material.
[0022] The chip grooves 8 of the first tooth-shaped structure 1 and the third tooth-shaped structure 3 are at the same position, and the chip grooves 8 of the second tooth-shaped structure 2 and the fourth tooth-shaped structure 4 are at the same position. The chip grooves 8 of the first tooth-shaped structure 1 and the chip grooves 8 of the second tooth-shaped structure 2 are arranged alternately. The purpose of the staggered arrangement is to ensure that when the secondary cutting edges of the chip grooves of two tooth-shaped structures are working, the main cutting edges of the other two tooth-shaped structures are cutting normally, thereby ensuring the continuity of cutting and providing good support.
[0023] The rear ends of the tooth-shaped structures are connected to the cutting edge 10, which is used to squeeze out and polish the hole wall. Grooves 11 are formed between adjacent tooth-shaped structures to ensure that there is enough space for chips.
[0024] The present invention is not limited to the above-mentioned optional implementation methods. Anyone can derive various other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A composite drill reamer with a chip dividing groove, characterized in that: The invention comprises four tooth-shaped structures arranged in a circumferential manner, the front ends of the four tooth-shaped structures intersecting at a drill tip (5), the first tooth-shaped structure (1) and the third tooth-shaped structure (3) being provided with a main cutting edge (6) and a reaming section (7) from front to back; the second tooth-shaped structure (2) and the fourth tooth-shaped structure (4) being provided with a reaming section (7), the reaming section (7) being provided with a chip dividing groove (8), and a secondary cutting edge (9) being formed on one side of the chip dividing groove (8).
2. The composite drill reamer according to claim 1, characterized in that: The chip-breaking grooves (8) of the first tooth-shaped structure (1) and the third tooth-shaped structure (3) are at the same position, the chip-breaking grooves (8) of the second tooth-shaped structure (2) and the fourth tooth-shaped structure (4) are at the same position, and the chip-breaking grooves (8) of the first tooth-shaped structure (1) and the chip-breaking grooves (8) of the second tooth-shaped structure (2) are arranged in an alternating manner.
3. The composite drill reamer according to claim 1, characterized in that: The rear ends of the tooth-shaped structures are connected to the cutting edges (10).
4. The composite drill reamer according to claim 1, characterized in that: Grooves (11) are formed between adjacent tooth-shaped structures.
5. The composite drill reamer according to claim 1, characterized in that: The top angle of the drill tip (5) is 90°.