Cutting edge structure of transverse feeding grooving blade

Abstract

The utility model relates to a cutting edge structure of a transverse feeding grooving blade, and belongs to the technical field of cutters. A cutting edge structure of a transverse feed grooving blade comprises a cutting edge body. The blade body is provided with two cutting edges, the two cutting edges are located on the two opposite sides of the blade body respectively, and the blade body is provided with a main cutting angle A1 and a backlash angle A2. The cutting edge is provided with a tool nose arc Ra and a tool top arc Rb. Through the design of the bilaterally symmetrical two-section type cutting edge, when the cutting edge conducts transverse cutting, compared with a traditional cutting edge, the cutting force borne by the cutting edge is smaller, the feeding speed is higher, and then the technical problem that a traditional grooving cutter is prone to bending is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, and particularly relates to a blade structure of a transverse feeding grooving blade. Background Art

[0002] Traditional grooving blades are square-headed blades and round-headed blades. When rough-cutting wide grooves, due to the large overhang ratio of the grooving tool structure, when the steel tool body overhang exceeds 3 times, it is easier to bend after being stressed. Therefore, to increase the lateral feed speed of the grooving blade, it is necessary to reduce the cutting force in the feed direction during lateral cutting, so that the tool can process normally at a higher lateral feed speed. Utility Model Content

[0003] The utility model provides a blade structure of a transverse feeding grooving blade, which is used to solve the above technical problems.

[0004] In order to achieve the above object, the utility model is implemented by the following technical solution: a blade structure of a transverse feed grooving blade includes a blade body. The blade body has two cutting edges, the two cutting edges are respectively located on opposite sides of the blade body, and the blade body has a main cutting angle A 1 and side clearance angle A 2 The cutting edge has a tip arc R a and tool top arc R b .

[0005] Optionally, the main cutting angle A 1 Satisfy 10°≤A 1 ≤12°, the side clearance angle A 2 Satisfy 7°≤A 2 ≤9°.

[0006] Optionally, the blade tip arc R a Meet 0.3mm≤R a ≤0.6mm, the blade top arc R b Meet 0.2mm≤R b ≤0.4mm.

[0007] Optionally, the width of the blade body is w, and the width w satisfies 3mm≤w≤8mm.

[0008] Optionally, the two cutting edges are two-stage circular arc cutting edges that are symmetrically arranged.

[0009] Optionally, the main cutting edge arc of the arc-shaped cutting edge is R c , the main cutting edge arc is R c Meet 16mm≤R c ≤20mm.

[0010] Optionally, the two cutting edges are two-stage straight-line cutting edges that are symmetrically arranged.

[0011] It can be seen from the above technical scheme that the beneficial effect of the blade structure of a transverse feed grooving blade provided by the utility model is that through the design of a two-stage cutting edge that is symmetrical on the left and right, when the blade is cutting transversely, compared with the traditional blade, the blade of the present application is subjected to smaller cutting force and faster feed speed, thereby solving the technical problem that traditional grooving tools are prone to deflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of the structure of a two-stage circular arc-shaped cutting edge blade provided in an embodiment of the utility model;

[0014] Figure 2 A schematic diagram of the structure of a two-stage straight-edge blade provided by an embodiment of the utility model;

[0015] Figure 3 This is a force analysis diagram of the cutting edges of the square-head blade, round-head blade and two-section blade provided in the embodiments of the utility model.

[0016] In the figure: 1-blade body. DETAILED DESCRIPTION

[0017] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0018] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] Example

[0022] Traditional grooving blades are square-headed blades and round-headed blades. When rough-cutting wide grooves, due to the large overhang ratio of the grooving tool structure, when the steel tool body overhang exceeds 3 times, it is easier to bend after being stressed. Therefore, to increase the lateral feed speed of the grooving blade, it is necessary to reduce the cutting force in the feed direction during lateral cutting, so that the tool can process normally at a higher lateral feed speed.

[0023] In order to solve the above technical problems, refer to Figure 1 As shown, the present embodiment provides a blade structure of a transverse feed grooving blade, including a blade body 1. The blade body 1 has two cutting edges, which are respectively located on opposite sides of the blade body. The blade body has a main cutting angle A 1 and side clearance angle A 2 The cutting edge has a tip arc R a and tool top arc R b The main cutting angle A 1 Satisfy 10°≤A 1 ≤12°, the side clearance angle A 2 Satisfy 7°≤A 2 ≤9°. The blade tip arc R a Meet 0.3mm≤R a ≤0.6mm, the blade top arc R b Meet 0.2mm≤R b The width of the blade body is w, and the width w satisfies 3mm≤w≤8mm.

[0024] On the basis of the above, refer to Figure 2As shown, the two cutting edges are symmetrically arranged two-stage straight-line cutting edges. Figure 3 As shown in the figure, the square-head blade and the round-head blade are commonly used blades for conventional grooving cutters. The forces of the three blade shapes are compared with the 4mm width grooving blade (when the cutting depth d is the same, the linear speed and the feed speed are the same, so the cutting force F of the three blade edges is also the same). Figure 3 As shown, f1 is the lateral force on the blade edge, and f2 is the longitudinal force on the blade edge.

[0025] Among them, the lateral force of the square head blade is the resultant force F, the longitudinal force is almost 0, and the cutting force is all distributed in the lateral direction. At this time, the tool is prone to deflection;

[0026] For round-end blades, we simplify the contact surface into a straight line for easy calculation (in fact, since the arc contact surface is larger than the straight line, the cutting force of the round blade will be greater than that of the simplified straight line blade). Figure 3 Medium 1 It is about 17°, and the force calculation is as follows:

[0027] Longitudinal force

[0028] f R1 =COS(17)*F≈0.956F

[0029] Lateral force

[0030] f R2 =SIN(17)*F≈0.292F

[0031] Two-stage straight cutting edge. Figure 3 Medium 2 It is about 12°, and the force calculation is as follows:

[0032] Longitudinal force

[0033] f V1 =COS(12)*F≈0.978F

[0034] Lateral force

[0035] f v2 =SIN(12)*F≈0.208F

[0036] Therefore, it can be seen that the force on the V-shaped blade in the cross-feed direction is about 71% of that on the round-end blade and only 20% of that on the square-end blade.

[0037] Since the maximum lateral force f1 that the same grooving tool can withstand is constant, and when the linear speed and cutting depth are the same, the feed rate of the tool is linearly related to the cutting force, the V-shaped blade with the smallest lateral force component can greatly increase the feed rate.

[0038] The feed efficiency comparison of the two-stage straight blade is calculated as follows:

[0039] fv≈0.292F / 0.208F≈1.4f(round head);

[0040] fv≈F / 0.208F≈4.8f(square head)

[0041] That is, at the same linear speed and cutting depth, the feed efficiency of the V-shaped blade can reach 1.4 times that of the round-end blade and 4.8 times that of the square blade.

[0042] On the basis of the above, refer to Figure 1 As shown, the two cutting edges can also be symmetrically arranged two-stage arc-shaped cutting edges, and the main cutting edge arc of the arc-shaped cutting edge is R c , the main cutting edge arc is R c Meet 16mm≤R c ≤20mm. The two symmetrical straight edges on the left and right sides are changed to arcs to increase the edge strength. When processing stainless steel, high-temperature alloys and other difficult-to-cut materials with large cutting forces, the stronger arc edge can make the arc edge have higher wear resistance than the straight edge.

[0043] In summary, in the design of the blade structure of a transverse feed grooving blade, the traditional square head blade and the round head blade are replaced by a two-stage straight blade. Compared with the cutting edges of the traditional square head blade and the round head blade, the two-stage straight blade is subjected to smaller transverse cutting force and has a faster feed speed, thereby solving the technical problem that the traditional grooving blade is prone to deflection. In order to facilitate the processing of difficult-to-cut materials with large cutting forces such as stainless steel and high-temperature alloys, the two-stage straight blade can also be replaced by a two-stage arc blade to increase the edge strength, which can make the arc blade have higher wear resistance than the straight blade.

[0044] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A blade structure of a transverse feed grooving blade, characterized in that: include: A blade body having two cutting edges, wherein the two cutting edges are respectively located on two opposite sides of the blade body, and the blade body has a main cutting angle A1 and a side clearance angle A2; The cutting edge has a tip arc R a And the tool top arc R b .

2. The blade structure of a transverse feed grooving blade according to claim 1, characterized in that: The main cutting angle A1 satisfies 10°≤A1≤12°, and the side clearance angle A2 satisfies 7°≤A2≤9°.

3. The blade structure of a transverse feed grooving blade according to claim 2, characterized in that: The tool tip arc R a Meet 0.3mm≤R a ≤0.6mm, the blade top arc R b Meet 0.2mm≤R b ≤0.4mm.

4. The blade structure of a transverse feed grooving blade according to claim 3, characterized in that: The width of the blade body is w, and the width w satisfies 3mm≤w≤8mm.

5. The blade structure of a transverse feed grooving blade according to claim 4, characterized in that: The two cutting edges are two-stage circular arc cutting edges that are symmetrically arranged.

6. The blade structure of a transverse feed grooving blade according to claim 5, characterized in that: The main cutting edge arc of the arc-shaped cutting edge is R c , the main cutting edge arc is R c Meet 16mm≤R c ≤20mm.

7. The blade structure of a transverse feed grooving blade according to claim 4, characterized in that: The two cutting edges are two-stage straight-line cutting edges that are symmetrically arranged.

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