Chip breaking blade capable of reducing winding of scrap iron

Abstract

The utility model discloses a chip breaking blade capable of reducing winding of scrap iron. The chip breaking blade comprises a blade body with a polygonal section, the polygon comprises corner parts and edge parts; the blade body comprises a rear blade face and front blade faces arranged on the front side and the rear side of the rear blade face, and the two front blade faces are symmetrically arranged. The corner part of the rear tool face is a chamfering part, the corner part of the front tool face is a chip breaking part, and the edge part of the front tool face is a diagonal plane; a first chip breaking groove is formed between the chip breaking part and the chamfering part and is lower than the chip breaking part; a second chip breaker groove is formed between the diagonal plane and the edge of the rear tool face and is lower than the diagonal plane. According to the chip breaking blade provided by the utility model, the form and the flow direction of scrap iron can be effectively controlled in the cutting process, so that the scrap iron generated in the cutting process can be effectively broken and separated, and the generation and winding of long cuttings are avoided; and the CBN material is adopted, so that the service life of the cutter is prolonged, and the cutter cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a chip breaker blade capable of reducing the winding of iron chips. Background Art

[0002] The cubic boron nitride tools in the prior art usually have mounting grooves opened at the corners of a polygonal carbide substrate, and a flat cubic boron nitride composite sheet is welded and fixed to the mounting groove of the carbide substrate. The cutting edge formed by the intersection of the upper surface and the side surface of the cubic boron nitride composite sheet is used to process high-hardness steel materials. However, the metal removal rate of such cubic boron nitride tools is low, because continuous cutting cannot break the chips, which will produce long chips. The long chips are very easy to curl and wrap around the tool, causing production shutdowns. At the same time, these chips will also scratch the surface of the workpiece during the production process, affecting the quality of the processed surface. On the other hand, when the cutting depth is large, the chips cannot be effectively processed and the cutting heat cannot be discharged in time, which leads to accelerated tool wear and a significant reduction in tool life. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a chip breaker blade that reduces the entanglement of iron chips. CBN (cubic boron nitride) with high hardness and high wear resistance is used as the main material of the chip breaker blade, so that the chip breaker blade can still maintain stable cutting performance during long-term, high-intensity cutting, reducing the need for frequent replacement due to tool wear; through the adjustment and improvement of the chip breaker blade structure, the shape and flow direction of iron chips can be effectively controlled during the cutting process, so that the iron chips generated during the cutting process can be effectively crushed and separated, thereby avoiding the generation and entanglement of long chips.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a chip breaking blade for reducing the entanglement of iron chips, comprising a blade body with a polygonal cross-section; the polygon includes a corner and an edge; the blade body includes a back cutting surface and a front cutting surface provided on the front and rear sides of the back cutting surface, and the two front cutting surfaces are symmetrically arranged; the corner of the back cutting surface is a chamfered edge, the corner of the front cutting surface is a chip breaking portion, and the edge of the front cutting surface is a beveled surface; a first chip breaking groove is provided between the chip breaking portion and the chamfered edge, and the first chip breaking groove is lower than the chip breaking portion; a second chip breaking groove is provided between the beveled surface and the edge of the back cutting surface, and the second chip breaking groove is lower than the beveled surface.

[0005] Furthermore, the chip breaking portion includes a first chip breaking surface and a second chip breaking surface, the first chip breaking surface and the second chip breaking surface are symmetrically connected with the angle bisector of the upper corner of the blade body as the axis; adjacent chip breaking portions are connected through the bevel surface.

[0006] Furthermore, the angle between the first chip breaking surface, the second chip breaking surface and the back tool surface is ɑ, and the range of ɑ is 40 to 45 degrees; the angle between the first chip breaking surface and the second chip breaking surface is γ, and the range of γ is 115 to 125 degrees.

[0007] Furthermore, with the angle bisector of the upper corner of the blade body as a baseline, the distance between the front end of the chip breaker portion and the top end of the chamfered portion is m, and the range of m is 0.12 to 0.16 mm.

[0008] Furthermore, a vertical distance from the outer surface of the rake face to the flank face is n, and the range of n is 0.08 to 0.1 mm.

[0009] Furthermore, the included angle between the chamfered surface and the flank surface is β, and the range of β is 15 to 25 degrees.

[0010] Furthermore, the first chip breaker groove is communicated with the second chip breaker groove, and the depth of the first chip breaker groove is greater than the depth of the second chip breaker groove.

[0011] Furthermore, the blade body is made of cubic boron nitride.

[0012] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention provides a chip breaker blade that reduces the entanglement of iron chips. Structurally, through the design of the beveled surface, the chip breaking part, the first chip breaking groove, and the second chip breaking groove, the iron chips generated during the cutting process can be effectively crushed and separated, thereby avoiding the generation and entanglement of long chips; the accumulation of iron chips on the workpiece and the tool is significantly reduced, and the cleanliness of the processing environment is improved; through the different inclination angles of the first chip breaking surface, the second chip breaking surface and the beveled surface in the chip breaking part, the blade is intermittently cut during cutting, and the cutting force will change in size during the cutting process, which is conducive to the breakage and discharge of iron chips, and further reduces the possibility of iron chip entanglement; in terms of material, CBN is used as the blade material, which improves the service life of the blade and reduces the cost of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the three-dimensional structure of the chip breaker blade provided by the utility model;

[0014] Figure 2 A schematic diagram of the front structure of the chip breaker blade provided by the utility model;

[0015] Figure 3 for Figure 2 A partial enlarged view of the middle area A;

[0016] Figure 4 This is a schematic side structural diagram of the chip breaker blade provided by the utility model.

[0017] In the figure: 1. Rake face; 2. Beveled face; 3. Chip breaking portion; 4. Chamfered edge; 5. Flank face; 6. Second chip breaker groove; 7. First chip breaker groove; 8. First chip breaking surface; 9. Second chip breaking surface. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example

[0020] like Figures 1 to 4 As shown, a chip breaker blade for reducing the entanglement of iron chips includes a blade body with a polygonal cross-section; in this embodiment, the polygon is a triangle, including three corners and three sides; the blade body includes a flank 5 and a rake face 1 provided on both sides of the flank 5, the two rake faces 1 being symmetrically arranged; the corners of the flank 5 are chamfered portions 4, the corners of the rake face 1 are chip breaker portions 3, and the edges of the rake face 1 are beveled surfaces 2; a first chip breaker groove 7 is provided between the chip breaker portion 3 and the chamfered portion 4, the first chip breaker groove 7 being lower than the chip breaker portion 3; a second chip breaker groove 6 is provided between the beveled surface 2 and the edge of the flank 5, the second chip breaker groove 6 being lower than the beveled surface 2. The first chip breaker groove 7 is connected to the second chip breaker groove 6, and the depth of the first chip breaker groove 7 is greater than the depth of the second chip breaker groove 6. Through the design of the beveled surface 2, the chip breaking portion 3, the first chip breaker groove 7, and the second chip breaker groove 6, the iron chips generated during the cutting process can be effectively crushed and separated, thereby avoiding the generation and entanglement of long chips; significantly reducing the accumulation of iron chips on the workpiece and the tool, and improving the cleanliness of the processing environment.

[0021] The chip breaking portion includes a first chip breaking surface 8 and a second chip breaking surface 9, and the first chip breaking surface 8 and the second chip breaking surface 9 are symmetrically connected with the angle bisector of the upper corner of the blade body as the axis; the adjacent chip breaking portions 3 are connected by the beveled surface 2. The angle between the first chip breaking surface 8, the second chip breaking surface 9 and the back cutting surface 5 is ɑ, and the range of ɑ is 40 to 45 degrees; in this embodiment, the angle ɑ is 43 degrees. The angle between the first chip breaking surface 8 and the second chip breaking surface 9 is γ, and the range of γ is 115 to 125 degrees; in this embodiment, the angle γ is 120 degrees. The angle between the beveled surface 2 and the back cutting surface 5 is β, and the range of β is 15 to 25 degrees. In this embodiment, the angle β is preferably 20 degrees. By designing the chip breaker with different inclination angles between the first and second chip breaker surfaces 8, 9, and the chamfered surface 2, the blade performs intermittent cutting. The cutting force fluctuates during the cutting process, facilitating the breakage and removal of chips, further reducing the likelihood of chip entanglement. This reduction in chip entanglement reduces vibration during the cutting process, reducing direct friction and impact between the tool and the workpiece, and thus reducing tool wear. Intermittent cutting better disperses cutting forces, preventing rapid tool wear caused by the concentration of cutting forces in a single area.

[0022] Taking the angle bisector of the upper corner of the blade body as the baseline, the distance between the front end of the chip breaker portion 3 and the top end of the chamfered edge portion 4 is m, and the range of m is 0.12 to 0.16 mm. In this embodiment, the distance m is 0.14 mm. The vertical distance from the outer surface of the front cutting edge 1 to the back cutting edge 5 is n, and the range of n is 0.08 to 0.1 mm. In this embodiment, the vertical distance n is 0.09 mm. Through reasonable size design, the cutting ability and chip breaking stability of the blade are increased.

[0023] The blade body is made of cubic boron nitride. CBN is known for its high hardness and wear resistance, enabling the blade to maintain stable cutting performance during long, intense cutting operations, reducing the need for frequent tool replacement due to wear. This extended lifespan not only reduces downtime for tool changes but also lowers tool consumption costs, bringing significant economic benefits to the company.

[0024] The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention shall be defined by the claims.

Claims

1. A chip breaker blade for reducing entanglement of iron chips, comprising a blade body having a polygonal cross-section; the polygon comprising corners and edges; characterized in that: The blade body includes a back cutting surface and a front cutting surface arranged on the front and rear sides of the back cutting surface, and the two front cutting surfaces are symmetrically arranged; the corner of the back cutting surface is a chamfered portion, the corner of the front cutting surface is a chip breaking portion, and the edge of the front cutting surface is a beveled surface; a first chip breaking groove is provided between the chip breaking portion and the chamfered portion, and the first chip breaking groove is lower than the chip breaking portion; a second chip breaking groove is provided between the beveled surface and the edge of the back cutting surface, and the second chip breaking groove is lower than the beveled surface.

2. A chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: The chip breaking portion includes a first chip breaking surface and a second chip breaking surface, wherein the first chip breaking surface and the second chip breaking surface are symmetrically connected with the angle bisector of the upper corner of the blade body as an axis; adjacent chip breaking portions are connected by the beveled surface.

3. A chip breaker blade for reducing entanglement of iron chips according to claim 2, characterized in that: The included angle between the first chip breaking surface, the second chip breaking surface and the back tool surface is ɑ, and the range of ɑ is 40 to 45 degrees; the included angle between the first chip breaking surface and the second chip breaking surface is γ, and the range of γ is 115 to 125 degrees.

4. The chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: Taking the angle bisector of the upper corner of the insert body as a baseline, the distance between the front end of the chip breaker portion and the top end of the chamfered portion is m, and the range of m is 0.12 to 0.16 mm.

5. The chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: A vertical distance from the outer surface of the rake face to the flank face is n, and the range of n is 0.08 to 0.1 mm.

6. The chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: The included angle between the chamfered surface and the flank surface is β, and the range of β is 15 to 25 degrees.

7. The chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: The first chip breaker groove is communicated with the second chip breaker groove, and the depth of the first chip breaker groove is greater than the depth of the second chip breaker groove.

8. The chip breaker blade for reducing iron chip entanglement according to claim 1, characterized in that: The blade body is made of cubic boron nitride.

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