A ball-end rough milling cutter for machining blades

Abstract

The utility model discloses a ball-end rough milling cutter for processing blades, belonging to the technical field of tool design. The ball-end rough milling cutter is symmetrically provided with four blades, the front angle of the blade is in the range of 5° to 7°, S-shaped grooves are provided on both sides of the front end of the transverse edge of the blade, the width of the transverse edge of the blade is in the range of 0.4mm to 0.6mm, the blade length is in the range of 35mm to 45mm, the angle of the back angle of the end teeth of the blade is in the range of 18° to 22°, and the angle of the helix angle of the blade is in the range of 32° to 36°. Compared with the ball-end milling cutter, the structure grinds a deep S-shaped groove on its top, and optimizes the parameters of the transverse edge and the values ​​of the front angle and back angle, effectively solving the technical problems of easy chipping and flicking of the existing transverse edge, thereby significantly reducing the cutting resistance, greatly improving the processing efficiency and the service life of the tool.

Description

Technical Field

[0001] The utility model belongs to the technical field of tool design, in particular to a ball-end rough milling cutter for machining blades. Background Art

[0002] In the field of military technology, when faced with the situation that casting technology is not mature enough, the cast parts often have uneven surface allowances, which causes great difficulties for subsequent processing. For example, the engine blades in a certain model have a casting process in the front stage. Since the blades are cast, they are limited by the casting environment and process technology, resulting in uneven heating on the blade surface, which often causes an increase in the imbalance of the blade surface and a hardened layer. This leads to a large blade machining allowance, and the blades are difficult to process materials, which further increases the difficulty of processing. In order to prevent overcutting and breaking during large tool paths and large feed processing, which leads to scrapping, multiple layered processing is mostly used during processing to remove the imbalance and excess allowance. At present, ball-end milling cutters are used to improve efficiency by adjusting processing parameters, but the results are not satisfactory. Instead of reducing costs and increasing efficiency, they are inefficient, time-consuming and labor-intensive, which greatly increases production costs.

[0003] The φ16R8 blade roughing ball end mill currently in use is difficult to improve efficiency when high quality is required. It is impossible to use a general ball end mill to meet the processing requirements. A new roughing ball end mill is used for milling. After many process and parameter adjustments, although the quality requirements are met, the efficiency is still very low. For example, when processing the blade basin, not only is it necessary to remove the imbalance many times, but the ball end mill also has overcutting and breaking during roughing. Through further research and improvement, the tool blade length, cutting edge, various angles and tool are post-processed. The results are higher quality and faster efficiency than those of non-passivation treatment, but the tool wear is still serious. When processing a small number of parts, a new tool must be replaced.

[0004] Therefore, how to design a new ball-end rough milling cutter to solve the technical difficulties in blade processing has long troubled technicians in this field. Utility Model Content

[0005] In response to the above technical problems, the utility model provides a ball-end rough milling cutter for processing blades, which effectively solves the technical problems of easy chipping and tool bounce at the existing transverse cutting edge, thereby significantly reducing cutting resistance and greatly improving processing efficiency and tool life.

[0006] The utility model solves the above problems through the following technical means:

[0007] A ball-end rough milling cutter for machining blades, characterized in that four blades are symmetrically arranged, wherein: the angle range of the front angle of the blade is 5° to 7°; S-shaped grooves are arranged on both sides of the front end of the transverse edge of the blade; the width range of the transverse edge of the blade is 0.4mm to 0.6mm; the blade length range is 35mm to 45mm; the angle range of the end tooth back angle of the blade is 18° to 22°; and the angle range of the helix angle of the blade is 32° to 36°.

[0008] Preferably, the front angle of the blade is 6°; the width of the transverse edge of the blade is 0.5 mm; the blade length ranges from 35 mm to 42 mm; the rear angle of the end teeth of the blade is 20°; and the helix angle of the blade is 35°.

[0009] Preferably, the width of the end tooth back angle is 0.5 mm to 1 mm.

[0010] The utility model discloses a ball-end rough milling cutter for machining blades, which has the following beneficial effects:

[0011] The ball-end rough milling cutter is symmetrically provided with four blades, and the front sides of the transverse edge of the blade are provided with S-shaped grooves and the angles are scientifically optimized, among which: the angle range of the front angle of the blade is 5° to 7°, the width range of the transverse edge of the blade is 0.4mm to 0.6mm, the blade length range is 35mm to 45mm, the angle range of the end tooth back angle of the blade is 18° to 22°, and the angle range of the helix angle of the blade is 32° to 36°. Compared with the ball-end milling cutter, this structure grinds a deep S-shaped groove on its top, and optimizes the parameters of the transverse edge and the values ​​of the front angle and back angle, effectively solving the technical problems of easy chipping and flicking of the existing transverse edge, thereby significantly reducing the cutting resistance, greatly improving the processing efficiency and tool life. In addition, the tool has the effect of tool passivation, good wear resistance, long service life, stable processing, and good shock absorption effect. In actual processing, the processing requirements of 1500r / min rotation speed and 1000mm / min feed speed are completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the end surface structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the blade structure of the utility model.

[0016] Among them, 1-front angle, 2-transverse edge, 3-S-shaped groove, 4-end tooth back angle, 5-helix angle. DETAILED DESCRIPTION

[0017] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0018] The present invention will be described in detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown, Figure 2 yes Figure 1 K-direction view, Figure 3 yes Figure 1 The CC cross-sectional view shows that the ball-end rough milling cutter for machining blades has four blades symmetrically arranged, wherein: the angle range of the front angle 1 of the blade is 5° to 7°; S-shaped grooves 3 are arranged on both sides of the front end of the transverse edge 2 of the blade; the width range of the transverse edge 2 of the blade is 0.4mm to 0.6mm; the blade length range is 35mm to 45mm; the angle range of the end tooth back angle 4 of the blade is 18° to 22°; the angle range of the helix angle 5 of the blade is 32° to 36°.

[0020] Specifically, the front angle 1 of the blade is 6°; the width of the transverse edge 2 of the blade is 0.5mm; the blade length ranges from 35mm to 42mm; the angle of the end tooth back angle 4 of the blade is 20°; the angle of the helix angle 5 of the blade is 35°, and the width of the end tooth back angle 4 is 0.5mm to 1mm.

[0021] It should be noted that the rough machining ball end milling cutter for blades is mainly used for the rough machining process of the blade basin and blade back of the blade. This milling cutter is a four-edge ball end milling cutter. Compared with the standard ball end milling cutter, the cross-edge width, fusion angle, front angle, back angle and blade length of the ball end milling cutter are adjusted. When the blade position of the first end tooth and the second end tooth remains unchanged, the conventional cross-edge width is widened and an S-shaped groove is made, which can effectively increase the cross-edge strength of the tool; the front angle is increased to 6° for easy chip removal, the helix angle is adjusted to 35°, the cross-edge is widened to 0.5mm, and the blade band of the cross-edge of the blade is scientifically processed by 0.3mm. The cross-edge strength of the ball end milling cutter is increased; the wear of the tool tip is reduced while reducing vibration; the back angle of the end tooth is changed to a 20° back angle and the blade length is adjusted from the original size to 35-42mm to improve the stability and service life of the tool.

[0022] In actual work, the structure grinds a deep S-shaped groove on the top, and optimizes the parameters of the chisel edge and the values ​​of the front angle and back angle, effectively solving the technical problems of easy chipping and tool bounce at the existing chisel edge, thereby significantly reducing cutting resistance, greatly improving processing efficiency and tool life. In addition, the tool has the effect of tool passivation, good wear resistance, long service life, stable processing, and good shock absorption effect. In actual processing, the processing requirements of 1500r / min speed and 1000mm / min feed speed are completed.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A ball-end rough milling cutter for machining blades, characterized in that: There are four blades arranged symmetrically, wherein: The rake angle (1) of the blade is in the range of 5° to 7°; S-shaped grooves (3) are arranged on both sides of the front end of the chisel edge (2) of the blade; The width of the chisel edge (2) of the blade is in the range of 0.4 mm to 0.6 mm; The blade length ranges from 35mm to 45mm; The angle range of the end tooth back angle (4) of the blade is 18° to 22°; The helix angle (5) of the blade is in the range of 32° to 36°.

2. The ball-end rough milling cutter for machining blades according to claim 1, characterized in that: The rake angle (1) of the blade is 6°; The width of the chisel edge (2) of the blade is 0.5 mm; The blade length ranges from 35mm to 42mm; The angle of the end tooth back angle (4) of the blade is 20°; The helix angle (5) of the blade is 35°.

3. The ball-end rough milling cutter for machining blades according to claim 1, characterized in that: The width of the end tooth back angle (4) is 0.5 mm to 1 mm.

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