Blade type for steel part chip breaking

Abstract

The utility model discloses an edge profile for chip breaking of a steel part, which belongs to the technical field of metal cutting processing and comprises a main cutting edge, the main cutting edge is provided with chip breaking grooves, the chip breaking grooves are arranged in the radial direction and the axial direction of the main cutting edge and are vertically arranged in the radial direction and the axial direction, the depth of each chip breaking groove is 0.2-0.4 mm, and the width of each chip breaking groove is 0.5-0.8 mm; the main cutting edge is provided with a guide edge at the position of an outer side cutting edge, and the guide edge is provided with a negative chamfer. The structure of the reamer is optimized, a combination of the chip breaker grooves which are vertically arranged in the radial direction and the axial direction is arranged, reliable breakage of reaming chips is achieved, the reamer is prevented from being wound, the spiral angle is arranged and adjusted, the chip removal direction is optimized, negative chamfered edges are arranged, the rigidity of the reamer is enhanced, hole wall scratching is reduced, the reaming surface quality is improved, the blade is coated with a coating, the hardness is improved, and the abrasion loss is reduced. The service life of the cutter is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of metal cutting technology, specifically to a cutting edge for chip breaking of steel parts. Background Technology

[0002] In reaming, traditional straight or spiral flute reamers tend to produce continuous, ribbon-like chips when reaming steel parts. This can cause chips to become entangled on the reamer during machining, scratch the hole wall, and even risk tool breakage. Furthermore, conventional chip breaking structures (such as single chip flutes) are not adaptable to changes in reaming feed rate, resulting in poor chip breaking stability and affecting machining quality. Utility Model Content

[0003] The purpose of this invention is to provide a cutting edge for chip breaking of steel parts to solve problems such as chip entanglement and poor surface quality during the reaming process.

[0004] Technical solution: This utility model provides a cutting edge for chip breaking of steel parts, including: a main cutting edge, wherein the main cutting edge is provided with chip breaking grooves, the chip breaking grooves are provided in both the radial and axial directions of the main cutting edge, and are arranged vertically in the radial and axial directions, the depth of the chip breaking grooves is 0.2-0.4mm, and the width is 0.5-0.8mm; a guide edge is provided at the outer edge position of the main cutting edge, and a negative chamfer is provided on the guide edge.

[0005] Furthermore, in the aforementioned cutting edge for chip breaking of steel parts, the main cutting edge is coated with a Helica coating with a thickness of 3-5 μm.

[0006] Furthermore, in the aforementioned cutting edge type for chip breaking of steel parts, the negative chamfer is set to a size of 0.05-0.1mm.

[0007] Furthermore, in the aforementioned cutting edge for chip breaking of steel parts, the guide blade has a 0.02mm thick WC-Co coating deposited at the cutting edge using laser cladding technology.

[0008] Furthermore, in the aforementioned cutting edge type for chip breaking of steel parts, the angle between the outermost helical tangent of the main cutting edge and the drill bit axis, i.e., the helix angle, is adjusted to 12°-18°.

[0009] Furthermore, in the aforementioned cutting edge type for chip breaking of steel parts, the main cutting edge forms a reamer cutting section, the reamer cutting section is connected to the reamer neck, and the other end of the reamer neck is connected to the tool holder.

[0010] Furthermore, in the aforementioned cutting edge type for chip breaking of steel parts, the main cutting edge is made of cermet material.

[0011] As can be seen from the above technical solution, this utility model has the following beneficial effects: The cutting edge for chip breaking of steel parts described in this utility model optimizes the reamer structure, sets a combination of chip breaking grooves arranged radially and axially vertically to achieve reliable chip breaking of reaming, avoids entanglement of the tool, adjusts the helix angle to 12°-18° to optimize the chip removal direction, optimizes the guide edge, sets a 0.05-0.1mm negative chamfer to enhance tool rigidity, reduce hole wall scratches, improve the surface quality of reaming, and coats the cutting edge with a coating to increase hardness, reduce wear, and effectively improve tool life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a cutting edge structure for chip breaking of steel parts according to the present invention;

[0013] Figure 2 This is a partially enlarged schematic diagram of section A of this utility model;

[0014] Figure 3 This is a side view of a cutting edge for chip breaking of steel parts according to the present invention;

[0015] Figure 4 This is a front view of the cutting part of the reamer in this utility model.

[0016] In the diagram: 1. Main cutting edge; 2. Chip breaker groove; 3. Guide edge; 4. Negative chamfer; 5. Reamer cutting section; 6. Reamer neck; 7. Tool holder. Detailed Implementation

[0017] Example 1

[0018] like Figure 1-2 The illustrated cutting edge for chip breaking of steel parts includes: a main cutting edge 1, wherein the main cutting edge 1 is provided with chip breaker grooves 2, which are provided both radially and axially on the main cutting edge 1, and are arranged perpendicularly in the radial and axial directions. The depth of the chip breaker grooves 2 is 0.2-0.4 mm, and the width is 0.5-0.8 mm; a guide edge 3 is provided at the outer edge position of the main cutting edge 1, and a negative chamfer 4 is provided on the guide edge 3. The combination of radial and axial chip breaker grooves 2, with the chip breaker grooves 2 arranged perpendicularly, achieves reliable chip breaking during reaming and avoids entanglement of the tool.

[0019] In this embodiment, the main cutting edge 1 is coated with a Helica coating using PVD technology, with a layer thickness of 3-5 μm. This improves tool life and reduces wear.

[0020] In this embodiment, the guide blade 3 has a 0.02mm thick WC-Co coating deposited at its cutting edge using laser cladding technology. This increases the hardness of the cutting edge, achieving a hardness of HV1800.

[0021] Example 2

[0022] Based on Example 1, in this example, as... Figure 2 The illustrated cutting edge type for chip breaking of steel parts has a negative chamfer 4 with a dimension of 0.05-0.1 mm. This enhances the rigidity of the tool and reduces scratches on the hole wall.

[0023] like Figure 3-4 The cutting edge shown is used for chip breaking of steel parts. The angle between the outermost helical tangent of the main cutting edge 1 and the drill bit axis, i.e., the helix angle, is adjusted to 12°-18°. This optimizes the chip removal direction and improves the chip removal effect.

[0024] In this embodiment, the main cutting edge 1 forms the reamer cutting part 5, the reamer cutting part 5 is connected to the reamer neck 6, and the other end of the reamer neck 6 is connected to the tool holder 7.

[0025] In this embodiment, the main cutting edge 1 is made of metal ceramic material.

[0026] In this embodiment, the reamer feed rate is set within the range of 0.1-0.3 mm / r, and the chip breaking rate reaches ≥95% (the chip breaking rate of the transmission reamer is 60%-70%).

[0027] It should be noted that the above description is merely a technical solution of the utility model and not a limitation. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the present utility model, and all such modifications and substitutions should be covered within the scope of the claims of the present utility model.

Claims

1. A cutting edge for chip breaking of steel parts, characterized in that: include: The main cutting edge (1) is provided with a chip breaker groove (2). The chip breaker groove (2) is provided in both the radial and axial directions of the main cutting edge (1) and is arranged vertically in the radial and axial directions. The depth of the chip breaker groove (2) is 0.2-0.4 mm and the width is 0.5-0.8 mm. The main cutting edge (1) is provided with a guide edge (3) at the outer edge position. The guide edge (3) is provided with a negative chamfer (4).

2. The cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The main cutting edge (1) is coated with a Helica coating with a thickness of 3-5 μm.

3. The cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The negative chamfer (4) is set to a size of 0.05-0.1mm.

4. The cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The guide blade (3) has a 0.02 mm thick WC-Co coating deposited at the cutting edge using laser cladding technology.

5. A cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The angle between the outermost spiral tangent of the main cutting edge (1) and the drill bit axis, i.e. the spiral angle, is adjusted to 12°-18°.

6. A cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The main cutting edge (1) forms the reamer cutting part (5), the reamer cutting part (5) is connected to the reamer neck (6), and the other end of the reamer neck (6) is connected to the tool holder (7).

7. A cutting edge for chip breaking of steel parts according to claim 1, characterized in that: The main cutting edge (1) is made of metal ceramic material.

Images