A spiral tooth milling cutter special for rough machining

Abstract

The utility model relates to a spiral tooth milling cutter special for rough machining, including handle, the lower extreme of handle is equipped with cutter body, the outside of cutter body is equipped with spiral cutting edge, spiral cutting edge is along the spiral distribution of cutter body outside, two adjacent spiral cutting edges all are equipped with main chip breaker groove between, the both sides lateral wall of main chip breaker groove is equipped with symmetrically vice chip breaker groove, the front side of cutter body is equipped with end blade, the handle and cutter body junction is equipped with annular shock absorption groove, has promoted the milling cutter whole shock absorption effect, reduced cutter wear and tear and fracture risk advantage etc.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular to a special spiral tooth milling cutter for rough machining. Background Technology

[0002] As one of the core cutting tools in metal cutting, the performance of milling cutters directly affects machining efficiency and quality. Roughing milling cutters, in particular, play a crucial role in efficiently removing material. They improve chip removal performance and cutting stability through a spiral flute structure. The core technology lies in achieving axial decomposition of cutting force and optimization of chip removal through spiral flute design. This tool adopts a carbide body structure with a large helix angle (usually 35°-45°). Each spiral edge is precision ground to form a progressive rake angle change, which ensures the strength of the cutting edge and reduces cutting vibration.

[0003] Patent application number CN202421617918.6 is a Chinese utility model patent, disclosing a left- and right-handed spiral end mill, relating to the field of end mill technology. It includes a shank body, with a peripheral cutting edge on one side of the shank body. The peripheral cutting edge has a main chip groove on its surface, and an end cutting edge is provided at one end of the shank body. This utility model, through the left- and right-handed spiral design, can effectively suppress burr generation, reduce the risk of the tool being pulled out of the shank, and ensure that chips generated during cutting can be smoothly discharged, improving cutting efficiency and tool life. However, this end mill has the following problems: firstly, its vibration suppression capability is poor; secondly, its chip removal performance is not improved. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an annular damping groove at the connection between the tool holder and the tool body, filled with a copper-nickel alloy layer, which solves the technical problem of poor vibration suppression of the milling cutter. Furthermore, by setting a helical cutting edge on the outside of the tool body and combining it with the structural design of the main chip groove and the secondary chip groove, the technical problem of no improvement in the chip removal performance of the milling cutter is solved.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A special spiral tooth end mill for roughing includes a shank, a cutter body at the lower end of the shank, a spiral cutting edge on the outer side of the cutter body, the spiral cutting edge being spirally distributed along the outer side of the cutter body, a main chip-breaking groove between two adjacent spiral cutting edges, secondary chip-breaking grooves symmetrically arranged on the two side walls of the main chip-breaking groove, an end cutting edge on the front side of the cutter body, and an annular vibration damping groove at the connection between the shank and the cutter body.

[0007] As a preferred embodiment, the annular vibration damping groove has two sections, and the interior of the annular vibration damping groove is filled with a copper-nickel alloy layer.

[0008] As a preferred embodiment, the secondary chip-breaking groove has a Y-shaped fork at its end, and the secondary chip-breaking groove extends from the bottom of the main chip-breaking groove to the outermost surface of the tool body.

[0009] As a preferred embodiment, the bifurcation angle of the Y-shaped fork is 60 degrees.

[0010] As a preferred embodiment, the secondary chip-dispersing groove is disposed on the side wall of the main chip-dispersing groove along the helical direction of the helical cutting edge.

[0011] As another preferred option, the handle and the blade body are integrally formed from cemented carbide.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, an annular damping groove is set at the connection between the tool holder and the tool body and filled with a copper-nickel alloy layer, which significantly enhances the anti-vibration performance and dynamic stability of the tool. During roughing, the cutting force is large, and the milling cutter is prone to vibration, which affects the machining accuracy and accelerates the wear of the milling cutter. The structure of the annular damping groove effectively absorbs the vibration energy generated during the cutting process and reduces the resonance phenomenon of the milling cutter. The copper-nickel alloy has good damping performance and wear resistance, which improves the damping effect and enables the tool to maintain a stable working state under high-speed cutting or intermittent cutting conditions, thereby improving the machining efficiency and workpiece surface quality.

[0014] (2) In this utility model, symmetrical secondary chip-dividing grooves are provided on both sides of the main chip-dividing groove, and the secondary chip-dividing grooves are arranged on the side walls on both sides of the main chip-dividing groove along the spiral direction, so that the chips can be more evenly divided and guided during the formation process, further enhancing the smoothness of chip removal. The end of the secondary chip-dividing groove is provided with a Y-shaped fork with a fork angle of 60 degrees, which helps the chips to be naturally diverted during the movement, avoiding local stress concentration, thereby reducing tool wear and breakage risk, and improving cutting stability and efficiency.

[0015] In summary, this milling cutter has advantages such as improving the overall vibration reduction effect of the milling cutter and reducing tool wear and breakage risk, and is especially suitable for the field of milling cutter technology. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2This is a schematic diagram of the position and structure of the annular vibration damping groove in this utility model.

[0019] Figure 3 This is a schematic diagram of the secondary chip separator groove (enlarged at point A) in this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] Example 1

[0022] like Figures 1 to 3 As shown, this utility model provides a special spiral tooth end mill for roughing, including a tool holder 1 for connecting to a machine tool spindle. A tool body 2 is located at the lower end of the tool holder 1, and spiral cutting edges 3 are provided on the outer side of the tool body 2. The spiral cutting edges 3 are spirally distributed along the outer side of the tool body 2, which facilitates uniform force distribution during cutting and improves chip removal efficiency. A main chip-distributing groove 4 is provided between each adjacent spiral cutting edge 3. The main chip-distributing groove 4 guides chip discharge, preventing chip accumulation that could increase cutting force or cause tool overheating. The groove shape of the main chip-distributing groove 4 is U-shaped, ensuring that chips can be quickly guided and discharged during their formation. The two sides of the main chip-distributing groove 4... Symmetrical chip-breaking grooves 41 are provided on the side wall. The front side of the cutter body 2 is provided with an end cutting edge 5, which is used to realize the axial cutting function and is suitable for end milling, step machining and other scenarios. A transition edge is provided between the end cutting edge 5 and the helical cutting edge 3 to ensure the continuity of force during the cutting process and avoid vibration or tool breakage caused by sudden changes in cutting force. An annular vibration damping groove 6 is provided at the connection between the tool holder 1 and the cutter body 2. The connection between the tool holder 1 and the cutter body 2 is a transition area, which is the part of the tool with the most sensitive dynamic response. The annular vibration damping groove 6 extends along the axis of the milling cutter and absorbs the vibration energy generated during the cutting process to improve the stability of the tool.

[0023] Furthermore, the annular vibration damping groove 6 is provided with two grooves, and the interior of the annular vibration damping groove 6 is filled with a copper-nickel alloy layer. After the copper-nickel alloy powder is filled into the annular vibration damping groove 6, it is sintered and fused at high temperature in an industrial-grade vacuum sintering furnace. The copper-nickel alloy is in a molten state at high temperature, which can fully penetrate the grain boundaries of the hard alloy to form a metallurgical interlocking structure. Finally, the entire tool is taken out and polished.

[0024] Furthermore, the secondary chip-dispersing groove 41 is provided with a Y-shaped fork 411 at its end, and the secondary chip-dispersing groove 41 extends from the bottom of the main chip-dispersing groove 4 to the outermost surface of the cutter body 2.

[0025] Furthermore, the Y-shaped fork 411 has a fork angle of 60 degrees. This angle allows the chips to naturally flow during the process, avoiding chip breakage or increased tool wear caused by stress concentration. During the chip flow process, the fork structure achieves uniform chip dispersion, thereby reducing local cutting pressure and improving tool life and machining stability.

[0026] Furthermore, the secondary chip-dispersing groove 41 is arranged on the side wall of the main chip-dispersing groove 4 along the helical direction of the helical cutting edge 3, so as to ensure that the chips are still guided by the secondary chip-dispersing groove 41 during the discharge process through the main chip-dispersing groove 4, and to avoid chip retention or reverse impact caused by sudden change of direction.

[0027] Furthermore, the handle 1 and the blade body 2 are integrally formed from cemented carbide. The cemented carbide is manufactured using powder metallurgy sintering process to ensure that the blade body has a dense structure and uniform mechanical properties.

[0028] Working process: First, the tool holder 1 is rigidly connected to the machine tool spindle. The tool holder 1 and the tool body 2, which are integrally formed by cemented carbide, ensure the overall structural strength and provide a stable foundation for cutting. Then, the end cutting edge 5 cuts into the workpiece axially. Then, when the tool body 2 rotates, the helical cutting edge 3 rotates and cuts into the workpiece. Under the action of radial cutting force, chips are formed. The main chip-breaking groove 4 between adjacent helical cutting edges 3 guides the large chips to be discharged. At the same time, the Y-shaped bifurcation 411 at the end of the symmetrical secondary chip-breaking grooves 41 on both sides of the main chip-breaking groove 4 allows the chips to be naturally diverted at a bifurcation angle of 60 degrees, avoiding stress concentration.

[0029] Secondly, during rough machining, the cutting force is relatively large, which easily causes the milling cutter to vibrate, affecting machining accuracy and accelerating cutter wear. The annular damping groove 6 effectively absorbs the vibration energy generated during cutting, reducing the resonance phenomenon of the milling cutter. The copper-nickel alloy has good damping performance and wear resistance, enhancing the vibration reduction effect and enabling the tool to maintain a stable working state under high-speed cutting or intermittent cutting conditions, thereby improving machining efficiency and workpiece surface quality.

[0030] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0031] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0032] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A helical tooth cutter for roughing, characterized by: The utility model relates to a spiral cutting tool, including handle (1), the lower end of handle (1) is equipped with cutter body (2), the outside of cutter body (2) is equipped with spiral cutting edge (3), spiral cutting edge (3) is spirally distributed along the outside of cutter body (2), and the both sides of the main chip breaker groove (4) of two adjacent spiral cutting edge (3) are equipped with auxiliary chip breaker groove (41) symmetrically, the front side of cutter body (2) is equipped with end blade (5), and the junction of handle (1) and cutter body (2) is equipped with annular shock absorption groove (6).

2. A helical cutter for roughing machining according to claim 1, characterized in that The annular shock absorption groove (6) is provided with two, and the annular shock absorption groove (6) is filled with a copper-nickel alloy layer inside.

3. A helical cutter for roughing machining according to claim 1, characterized in that, The auxiliary chip breaker groove (41) is provided with a Y-shaped bifurcated mouth (411) at the end, and the auxiliary chip breaker groove (41) extends from the groove bottom of the main chip breaker groove (4) to the outermost surface of the cutter body (2).

4. A helical cutter for roughing machining according to claim 3, characterized in that The bifurcated angle of the Y-shaped bifurcated mouth (411) is 60 degrees.

5. The helical tooth cutter for roughing machining according to claim 1, wherein The auxiliary chip breaker groove (41) is arranged on the side wall of the main chip breaker groove (4) along the spiral line direction of the spiral cutting edge (3).

6. A helical cutter for roughing machining according to claim 1, wherein The handle (1) and the cutter body (2) are integrally formed by hard alloy.

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