Spiral reamer for machining bakelite

Abstract

The utility model relates to the technical field of machining tools, and discloses a spiral reamer for machining bakelite, which comprises a reamer handle, a cutting part is arranged at one end of the reamer handle, a guide tip is arranged at the end of the cutting part, main guide cutting edges and auxiliary cutting edges are laterally arranged on the cutting part, a scrap discharging groove is arranged between the two main guide cutting edges, and the scrap discharging groove is communicated with the auxiliary cutting edges. The edge of the guide main cutting edge is provided with a cutting taper, the cutting taper is 2 degrees, and due to the design of the taper, the cutter is more stable in the cutting process, vibration is reduced, the abrasion resistance of the cutter is improved, and the service life of the cutter is prolonged. The cylindrical edge strip with the width of 0.12 mm can play a supporting role in the cutting process, friction between the cutter and a workpiece is reduced, heat generation is reduced, and therefore abrasion is reduced, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of machining cutters, in particular to a spiral reamer for machining bakelite. Background Art

[0002] Bakelite is a phenolic resin, a thermosetting plastic with high hardness, so the requirements for tools during processing are more stringent. When using traditional reamer to process Bakelite, since the reamer edge is usually made of high-speed steel or other cemented carbide, these materials are hard, but they are still prone to wear when processing hard materials such as Bakelite. The hardness and wear resistance of Bakelite may cause rapid wear of the tool edge, especially in high-speed cutting or large feed conditions. Due to edge wear, the cutting accuracy of the tool will decrease, resulting in the size and shape of the processed product failing to meet the design requirements. Geometric tolerance refers to the deviation between the actual shape and the ideal shape of the part, and the deviation between the actual position and the ideal position. Tool wear can cause these deviations to exceed the allowable range. Due to the hardness and wear resistance of Bakelite, traditional reamers need to be sharpened or replaced more frequently during processing, which greatly shortens the service life of the tool. This not only increases production costs, but also reduces production efficiency; frequent tool changes require downtime and manual intervention, which increases labor costs and reduces the efficiency of automated production lines. Utility Model Content

[0003] The utility model aims to provide a spiral reamer for processing bakelite to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a spiral reamer for processing bakelite, comprising: a shank, a cutting portion is provided at one end of the shank, a guide tip is provided at the end of the cutting portion, a guide main cutting edge and a secondary cutting edge are provided laterally of the cutting portion, a chip discharge groove is provided between the two guide main cutting edges, a cutting taper is provided on the edge of the guide main cutting edge, and the cutting taper is 2 degrees.

[0005] As a further description of the present invention, a cutting edge band is provided on the guiding main cutting edge, and the width of the cutting edge band is 0.12-0.15 mm.

[0006] As a further description of the present invention, the guiding main cutting edge includes a left edge and a right edge, the left edge and the right edge are symmetrical to each other, and the back of the guiding main cutting edge includes a first back angle and a second back angle.

[0007] As a further description of the present invention, the secondary cutting edge is a cutting side ligament.

[0008] As a further description of the present invention, the secondary cutting edge is used for supporting the hole wall and correcting the positional form and position tolerance of the workpiece hole.

[0009] As a further illustration of the present invention, the angle between the side wall of the guide tip and the center line of the cutting portion is 30-45 degrees.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model grinds a 2-degree taper on the edge of the guide main cutting edge and grinds a 0.12 cylindrical land on the edge. The taper design makes the tool more stable during the cutting process, reduces vibration, and thus improves the wear resistance and service life of the tool. The 0.12mm wide cylindrical land can play a supporting role during the cutting process, reduce the friction between the tool and the workpiece, reduce the generation of heat, thereby reducing wear and extending the service life of the tool;

[0012] In addition, the taper and edge band design of the utility model helps to optimize the distribution of cutting force, which can reduce local stress concentration and avoid premature tool damage, while also helping to improve machining accuracy and surface quality. The presence of tapers and edge bands can reduce material deformation during the cutting process. When the tool cuts into the workpiece, the material will produce plastic deformation in front of the tool, and the design of tapers and edge bands helps to reduce this deformation, thereby reducing cutting force and thermal load and extending tool life.

[0013] The 0.12-0.15mm margin width can improve the chip discharge efficiency. During the reaming process, the chips can be discharged smoothly, avoiding chip blockage and secondary cutting, and reducing tool wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a spiral reamer for processing bakelite according to the utility model;

[0015] Figure 2 This is a schematic diagram of the end structure of a spiral reamer for processing bakelite according to the utility model;

[0016] Figure 3 It is a partial enlarged schematic diagram of the guiding main cutting edge of a spiral reamer for processing bakelite of the utility model;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the section at AA in the middle.

[0018] In the figure: 1, guide tip; 2, guiding main cutting edge; 201, first clearance angle; 202, second clearance angle; 3, secondary cutting edge; 4, chip discharge groove; 5, tool handle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 4 The utility model provides a technical solution: a spiral reamer for processing bakelite, comprising: a shank 5, a cutting portion is provided at one end of the shank 5, a guide tip 1 is provided at the end of the cutting portion, a guide main cutting edge 2 and a secondary cutting edge 3 are provided laterally on the cutting portion, a chip discharge groove 4 is provided between the two guide main cutting edges 2, and a cutting taper is provided on the edge of the guide main cutting edge 2, and the cutting taper is 2 degrees. A 2-degree taper is ground on the edge of the guide main cutting edge, and a 0.12 cylindrical edge band is ground on the edge. The taper design makes the tool more stable during the cutting process and reduces vibration, thereby improving the tool's wear resistance and service life. The 0.12mm wide cylindrical edge band can play a supporting role during the cutting process, reduce the friction between the tool and the workpiece, and reduce the generation of heat, thereby reducing wear and extending the tool's service life;

[0021] A cutting edge band is provided on the guide main cutting edge 2, and the width of the cutting edge band is 0.12-0.15 mm. The 0.12-0.15 mm width of the cutting edge band can improve the chip discharge efficiency. During the reaming process, the chips can be discharged smoothly, avoiding chip blockage and secondary cutting, and reducing tool wear.

[0022] The guiding main cutting edge 2 includes a left edge and a right edge, and the left edge and the right edge are symmetrical to each other. The back of the guiding main cutting edge 2 includes a first back angle 201 and a second back angle 202 .

[0023] The auxiliary cutting edge 3 is a cutting side ligament and is used for hole wall support and correction of positional tolerance of the workpiece hole.

[0024] The angle between the side wall of the guide tip 1 and the center line of the cutting part is 30-45 degrees. The guide tip can ensure the correct position of the tool during the processing, help to ensure the size and shape accuracy of the processed workpiece, and can reduce vibration during the cutting process, thereby reducing the wear of the tool and extending its service life. The design of the guide tip helps to improve drilling efficiency, especially when using a drilling jig, so that the hole can be processed quickly and accurately.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The utility model grinds a 2-degree taper on the edge of the guide main cutting edge and grinds a 0.12 cylindrical land on the edge. The taper design makes the tool more stable during the cutting process, reduces vibration, and thus improves the wear resistance and service life of the tool. The 0.12mm wide cylindrical land can play a supporting role during the cutting process, reduce the friction between the tool and the workpiece, reduce the generation of heat, thereby reducing wear and extending the service life of the tool;

[0027] In addition, the taper and edge band design of the utility model helps to optimize the distribution of cutting force, which can reduce local stress concentration and avoid premature tool damage, while also helping to improve machining accuracy and surface quality. The presence of tapers and edge bands can reduce material deformation during the cutting process. When the tool cuts into the workpiece, the material will produce plastic deformation in front of the tool, and the design of tapers and edge bands helps to reduce this deformation, thereby reducing cutting force and thermal load and extending tool life.

[0028] The 0.12-0.15mm margin width can improve the chip discharge efficiency. During the reaming process, the chips can be discharged smoothly, avoiding chip blockage and secondary cutting, and reducing tool wear.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A spiral reamer for processing bakelite, comprising: A tool handle (5), characterized in that: a cutting portion is provided at one end of the tool handle (5), a guide tip (1) is provided at the end of the cutting portion, a guide main cutting edge (2) and a secondary cutting edge (3) are provided laterally of the cutting portion, a chip discharge groove (4) is provided between the two guide main cutting edges (2), and a cutting taper is provided at the edge of the guide main cutting edge (2), and the cutting taper is 2 degrees.

2. A spiral reamer for processing bakelite according to claim 1, characterized in that: The guiding main cutting edge (2) is provided with a cutting edge band, and the width of the cutting edge band is 0.12-0.15 mm.

3. A spiral reamer for processing bakelite according to claim 1, characterized in that: The guiding main cutting edge (2) comprises a left edge and a right edge, the left edge and the right edge are symmetrical to each other, and the back of the guiding main cutting edge (2) comprises a first back angle (201) and a second back angle (202).

4. A spiral reamer for processing bakelite according to claim 1, characterized in that: The secondary cutting edge (3) is a cutting side ligament.

5. A spiral reamer for processing bakelite according to claim 4, characterized in that: The secondary cutting edge (3) is used for supporting the hole wall and correcting the positional form and position tolerance of the workpiece hole.

6. A spiral reamer for processing bakelite according to claim 1, characterized in that: The included angle between the side wall of the guide tip (1) and the center line of the cutting portion is 30-45 degrees.

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