High-hardness round nose milling cutter for titanium alloy machining

Abstract

The utility model belongs to the technical field of machining cutters, particularly relates to a high-hardness round-nose milling cutter for titanium alloy machining, and aims to solve the problems that an existing device is not provided with a chip breaker groove, cuttings are difficult to break naturally and are extremely easy to wind on a cutter and a workpiece, cutter abrasion is aggravated, the service life of the cutter is shortened, the quality of a machined surface is affected, and the machining cost is high. According to the technical scheme, the cutting tool comprises a tool handle, a tool body is installed at one end of the tool handle, and a plurality of cutting edges are annularly distributed and fixed to the periphery of the tool body; the cutter has the advantages that the wave-shaped chip breaker grooves efficiently break chips to form a C shape or a short spiral shape, the parabola-shaped chip containing grooves and the spiral chip separating grooves cooperate, the former provides a large chip containing space and guides the chips, the latter divides the chips, winding is avoided, smooth chip removal is guaranteed, the situation that the chips wind a cutter or a workpiece is reduced, local excessive abrasion of the cutter is prevented, and the service life of the cutter is prolonged. The service life of the cutter is prolonged, and the machining precision is also improved.

Description

Technical Field

[0001] This utility model relates to a round nose end mill, specifically a high-hardness round nose end mill for machining titanium alloys, belonging to the field of machining tool technology. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, the cutting teeth sequentially and intermittently remove the excess material from the workpiece. In machining, milling cutters are used to mill end faces, bevels, grooves, and stepped surfaces on different workpieces.

[0003] In the prior art, such as the high-hardness steel round nose end mill disclosed in announcement number CN213827194U, a connecting groove is set inside the end mill shank, and a connecting post is set on one side of the end mill shank. The connecting post is engaged in the connecting groove, the end mill shank is clamped by a clamping block, and the end mill shank and the end mill shank are fixed together by a fastening collar. This makes the end mill easy to assemble and disassemble while ensuring the structural strength of the end mill itself. The above-mentioned prior art has the following shortcomings: the above-mentioned round nose end mill is not designed with chip breaking grooves. In the process of machining titanium alloy, due to the high toughness of titanium alloy chips, without the assistance of chip breaking grooves, the chips are difficult to break naturally and are very easy to wrap around the tool and the workpiece, which aggravates tool wear, shortens tool life, and affects the surface quality of the machined product, making it difficult to meet the quality standards of high-precision products. Utility Model Content

[0004] The purpose of this invention is to provide a high-hardness round nose end mill for machining titanium alloys, which solves the problem that the above-mentioned devices do not have chip breaking grooves, making it difficult for chips to break naturally, and they are very easy to wrap around the tool and workpiece, aggravating tool wear, shortening tool life, and affecting the surface quality of the machined product, making it difficult to meet the quality standards of high-precision products.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a high-hardness round nose end mill for titanium alloy machining, including a tool holder;

[0006] The tool holder is equipped with a tool body at one end. Multiple cutting edges are fixed in a ring around the outer periphery of the tool body. The cutting edges are distributed in a spiral shape. The cutting edge at the end of the tool body is arc-shaped. The surface of the cutting edge at the arc-shaped end has multiple chip breaking grooves. The chip breaking grooves are wavy in shape.

[0007] As a further improvement of this invention: a chip groove is naturally formed between every two adjacent cutting edges, and the cross-sectional shape of the chip groove is parabolic.

[0008] As a further improvement of this utility model: one end of the blade body is integrally formed with a conical end, and the surface of the conical end is spirally provided with chip-separating grooves.

[0009] As a further improvement of this utility model, the chip-dispersing groove extends spirally from the end of the cone towards one side of the cutter body and is connected to the chip-receiving groove.

[0010] As a further improvement of this utility model, the chip groove on the surface of the blade extends spirally from the conical end toward the handle.

[0011] As a further improvement of this utility model, the included angle between two adjacent chip-breaking grooves is equal.

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

[0013] This utility model uses a combination of structures such as a cutter body, cutting edge, chip groove, chip breaking groove, conical end, and chip separating groove. The wave-shaped chip breaking groove design causes the chips to be subjected to periodic compression and shearing during the cutting process, which can efficiently break the chips into short C-shaped or short spiral shapes.

[0014] After being broken off, the small chips are smoothly discharged from the processing area under the combined guidance of the parabolic chip groove and the spiral chip divider. The parabolic chip groove provides a large chip space and guides the chips to slide out, while the chip divider further divides the chips to prevent them from tangling together and ensures smooth chip discharge.

[0015] Chips can be discharged in an orderly manner, with very little chance of getting tangled on the tool or workpiece. This prevents the tool from experiencing excessive local wear and breakage due to chip problems, resulting in more uniform tool wear, extended tool life, and improved machining accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 In this utility model Figure 1 A schematic diagram of the bottom structure;

[0018] Figure 3 In this utility model Figure 1 A top-view structural diagram;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the blade body in this utility model;

[0020] In the diagram: 1. Tool holder; 2. Tool body; 3. Cutting edge; 4. Chip groove; 5. Chip breaker groove; 6. Tapered end; 7. Chip divider groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 4 As shown, a high-hardness round nose end mill for machining titanium alloys includes a tool holder 1;

[0023] The tool holder 1 is equipped with a tool body 2 at one end. Multiple cutting edges 3 are fixed in a ring around the outer periphery of the tool body 2. The cutting edges 3 are distributed in a spiral shape. The cutting edge 3 at the end of the tool body 2 is arc-shaped. Multiple chip breaking grooves 5 are on the surface of the cutting edge 3 at the arc-shaped end. The chip breaking grooves 5 are wavy in shape.

[0024] Multiple cutting edges 3 are spirally distributed around the outer periphery of the tool body 2, improving cutting performance. Compared with straight cutting tools, the spiral cutting edges 3 can gradually cut into the workpiece during cutting, making the cutting force more uniform and avoiding excessive instantaneous impact force. This not only reduces tool wear and extends tool life, but also makes the machining process more stable. The cutting edge 3 at the end of the tool body 2 is arc-shaped, increasing the contact area between the tool and the workpiece. During the cutting process, the cutting force per unit area is dispersed, reducing the local pressure of the cutting edge 3 and reducing tool wear. The arc-shaped cutting edge 3 can achieve a smoother cutting transition, resulting in a lower surface roughness after machining and improving the machining accuracy of the parts. The wave-shaped chip breaker 5 generates periodic compression and bending action on the chips during the cutting process, making it easier for the chips to break into small segments and quickly discharge them from the machining area. This effectively prevents chips from entangled in the tool and workpiece, ensuring the continuity of the machining process, improving machining efficiency, and reducing defects such as tool damage and workpiece surface scratches caused by chip problems.

[0025] Furthermore, a chip groove 4 is naturally formed between every two adjacent cutting edges 3, and the cross-sectional shape of the chip groove 4 is parabolic.

[0026] When machining titanium alloys, the chips generated during the cutting process are relatively large. The parabolic chip groove 4 can effectively prevent chip accumulation due to insufficient chip space, thereby maintaining the continuity of machining. The parabolic groove wall can guide the chips to be discharged quickly along a specific trajectory. When the milling cutter rotates at high speed, the chips will slide smoothly out of the machining area along the parabolic chip groove 4 wall under the action of centrifugal force and the scouring action of cutting fluid.

[0027] Furthermore, one end of the cutter body 2 is integrally formed with a tapered end 6, and the surface of the tapered end 6 is spirally provided with chip-breaking grooves 7.

[0028] The chip divider 7 divides the originally continuous chips into smaller parts, reducing the width and thickness of the chips, making it easier for the chips to be broken by the subsequent chip breaking grooves. It also reduces the resistance when the chips are discharged, effectively avoiding poor chip discharge caused by excessively large or wide chips. Example 2

[0029] Improvements based on Example 1:

[0030] Furthermore, the chip-breaking groove 7 extends spirally from the end of the tapered end 6 towards one side of the cutter body 2 and connects with the chip-collecting groove 4. The chip-breaking groove 7, spirally formed on the surface of the tapered end 6, connects with the chip-collecting groove 4, providing a clear and smooth discharge path for the chips. Under the action of the cutting force and the centrifugal force generated by the rotation of the milling cutter, the chips can quickly and orderly enter the chip-collecting groove 4 along the spiral direction of the chip-breaking groove 7, and finally be discharged from the machining area. This greatly reduces the possibility of chips entangled in the tool and workpiece, ensuring the continuity and stability of the machining process and avoiding machining interruptions and tool damage caused by chip problems.

[0031] Furthermore, the chip groove 4 on the surface of the cutter body 2 extends spirally from the conical end 6 toward the handle 1.

[0032] The spirally extended chip groove 4 and the chip separating groove 7 fit together closely, which can make full use of the centrifugal force generated by the rotation of the milling cutter. During the cutting of titanium alloy, the chips will move quickly from the cone end 6 to the tool holder 1 along the groove wall of the spirally extended chip groove 4 under the action of centrifugal force, and finally be smoothly discharged from the machining area. At the same time, the spirally extended chip groove 4 can accommodate more chips, significantly improving the chip holding capacity of the tool without increasing the outer diameter of the tool, and preventing chip blockage caused by insufficient chip holding space.

[0033] Furthermore, the included angle between two adjacent chip-breaking grooves 7 is equal.

[0034] The equal-angle chip groove 7 ensures that each chip segment is consistent in width and thickness, avoiding situations where some chips are too large, difficult to break and remove, and facilitating subsequent chip breaking and removal.

[0035] Working principle: When in use, select a piece of titanium alloy blank to be processed and clamp it on the machine tool. Then, take out the high-hardness round nose end mill for titanium alloy processing, clean the chip groove 4 and chip separation groove 7 to ensure that there are no residual chips or other debris inside, so as to create good conditions for efficient chip removal. Then, with the help of the clamping mechanism of the machine tool, smoothly insert the end mill shank 1 into the taper hole of the machine tool spindle to ensure that the shank 1 is tightly connected to the spindle. Start the machine tool to make the high-hardness round nose end mill rotate to process the blank.

[0036] During the machining process, due to the unique wave-shaped chip breaker groove 5 design of the milling cutter, the chips are subjected to periodic compression and shearing during the cutting process, and are efficiently broken into short C-shaped or short spiral shapes. These small chip segments are smoothly discharged from the machining area under the synergistic guidance of the parabolic chip breaker groove 4 and the spiral chip divider groove 7. The parabolic chip breaker groove 4, due to its unique cross-sectional shape, provides a large chip-carrying space and can guide the chips to slide out quickly along the groove wall. The chip divider groove 7 extends spirally from the end of the cone end 6 to one side of the cutter body 2 and connects with the chip breaker groove 4, further dividing the chips and preventing the chips from tangling with each other. Throughout the machining process, the chips can always be discharged in an orderly manner, and there is very little situation where they are tangled on the tool or workpiece, ensuring the continuous stability of the cutting process, while ensuring the quality of machining and improving machining accuracy.

[0037] After the workpiece is finished, remove the used milling cutter from the machine tool spindle. First, use a brush to remove large chips from the surface of the cutter body 2. Then, use a high-pressure water gun to rinse the cutter body 2, especially the inside of the chip groove 4 and chip divider 7, to ensure that there are no residual impurities. Then, put it into a special tool box for proper storage to prepare for the next machining.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-hardness round nose end mill for machining titanium alloys, comprising a tool holder (1); Its features are: The handle (1) is equipped with a blade body (2) at one end. Multiple cutting edges (3) are fixed in a ring around the outer periphery of the blade body (2). The cutting edges (3) are spirally distributed. The cutting edge (3) at the end of the blade body (2) is arc-shaped. The surface of the cutting edge (3) at the arc-shaped end has multiple chip breaking grooves (5). The chip breaking grooves (5) are wavy in shape.

2. The high-hardness round nose end mill for machining titanium alloys according to claim 1, characterized in that: A chip groove (4) is naturally formed between every two adjacent cutting edges (3), and the cross-sectional shape of the chip groove (4) is parabolic.

3. The high-hardness round nose end mill for machining titanium alloys according to claim 1, characterized in that: One end of the blade (2) is integrally formed with a conical end (6), and the surface of the conical end (6) is spirally provided with chip-breaking grooves (7).

4. The high-hardness round nose end mill for machining titanium alloys according to claim 3, characterized in that: The chip-dispersing groove (7) extends spirally from the end of the cone end (6) toward one side of the cutter body (2) and is connected to the chip-receiving groove (4).

5. The high-hardness round nose end mill for machining titanium alloys according to claim 1, characterized in that: The chip groove (4) on the surface of the blade (2) extends spirally from the cone end (6) toward the handle (1).

6. The high-hardness round nose end mill for machining titanium alloys according to claim 3, characterized in that: The included angle between two adjacent chip-breaking grooves (7) is equal.

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