Powerful drilling tool

Abstract

The utility model belongs to the technical field of automobiles, and particularly relates to a powerful drilling tool which comprises a cutting part, the bottom of the cutting part is fixedly connected with a clamping part, the cutting part comprises a plurality of spiral cutting edges, the spiral cutting edges are all arranged at the top of the clamping part, and the clamping part is fixedly connected with the clamping part. Main chip grooves are formed in the peripheries of the multiple spiral cutting edges, chip groove positive cones are arranged in the main chip grooves, each spiral cutting edge comprises a lateral cutting edge and a bottom cutting edge, and each lateral cutting edge comprises a lateral front cutter face, a lateral rear cutter face and a lateral main cutting edge. By arranging the lateral cutting edge and the bottom cutting edge, the jumping value of the lateral cutting edge and the bottom cutting edge is smaller than or equal to 0.003 mu m, the service life of the cutter is prolonged, and due to the excellent lateral cutting edge and the excellent bottom cutting edge, the cutter has the maximum cutting force, and meanwhile the stability and durability of the cutter are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and particularly relates to a high-strength drilling tool. Background Art

[0002] With the development of science and technology, high-strength drill bits are widely used in the efficient and high-quality hole processing of parts in fields such as aerospace, high-speed rail cars, power equipment, and 3C. In the current environment of a large market demand for holes processed by high-strength drill bits, it is extremely urgent to develop a high-strength drill bit with stable performance, high processing efficiency, and long service life.

[0003] At present, the application prospect of high-strength drill bits is extremely broad, and they have a very wide application in places with different hole diameters and where cost savings are required for hole processing; the accuracy and complexity of products in the machining industry are guaranteed by the accuracy of the machine tool itself on the one hand, and more importantly, by the accuracy and shape of the cutting tool on the other hand. The strength of ordinary drill bits is not high. Therefore, the introduction of this series of potential drilling solutions has led the development of processing technology. As an essential part of manufacturing and processing, high-strength drilling tool technology directly affects production efficiency, the processing strength of parts, and manufacturing costs. The hardness, wear resistance, strength and toughness, heat resistance, process performance, and economy of the tool are the key factors in manufacturing. High-strength drilling tools must consider issues such as tool strength, chip evacuation, and tool stability. Therefore, a high-strength drilling tool is proposed to solve the above problems.

[0004] It should be noted that the above content belongs to the technical cognition scope of the inventor and does not necessarily constitute the prior art. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides a high-strength drilling tool, which solves the existing problems.

[0006] To achieve the above object, the utility model provides the following technical solution: A high-strength drilling tool includes a cutting part, the bottom of the cutting part is fixedly connected with a clamping part, the cutting part includes a plurality of spiral cutting edges, a plurality of the spiral cutting edges are all arranged on the top of the clamping part, main chip evacuation grooves are opened on the outer peripheries of the plurality of spiral cutting edges, a chip evacuation groove positive cone is arranged inside the main chip evacuation grooves, and the spiral cutting edge includes a lateral cutting edge and a bottom cutting edge;

[0007] The lateral cutting edge includes a lateral rake face, a lateral flank face, and a lateral main cutting edge. The lateral main cutting edge is located at the intersection of the main chip evacuation groove and the lateral flank face. A reverse cone is arranged on the lateral flank face, and an arc is arranged at the intersection of the lateral cutting edge and the bottom cutting edge;

[0008] The bottom cutting edge includes a bottom rake face, a bottom flank face portion, and a bottom main cutting edge. The bottom main cutting edge is located at the intersection of the bottom rake face and the bottom flank face portion. The bottom flank face portion includes a first bottom flank face and a second bottom flank face.

[0009] As a preferred technical solution of the present utility model, the width of the side flank face is 0.5 mm, the back angle of the side flank face is 0°, and the taper is 0.2 / 100.

[0010] As a preferred technical solution of the present utility model, the end of the main chip flute extends along the helical cutting edge to the clamping portion. An auxiliary chip flute is provided at the end of the main chip flute, and the length of the auxiliary chip flute is 10 - 12 mm.

[0011] As a preferred technical solution of the present utility model, the width of the first bottom flank face is 1.4 mm, and the clearance angle of the first bottom flank face is 10°.

[0012] As a preferred technical solution of the present utility model, a helix angle is provided on the helical cutting edge. The helix angle is 30°, and the main chip flute is in the shape of an R-shaped parabola.

[0013] As a preferred technical solution of the present utility model, the runout value of the cutting portion is ≤0.003 μm, and the runout value of the clamping portion is ≤0.002 μm.

[0014] As a preferred technical solution of the present utility model, the cutting portion and the clamping portion are of an integral structure.

[0015] Compared with the prior art, the present utility model provides a high-performance drilling tool, which has the following beneficial effects:

[0016] 1. For this high-performance drilling tool, by providing a side cutting edge and a bottom cutting edge, with the runout value of the side cutting edge and the bottom cutting edge being ≦0.003 μm, the service life of the tool is increased. With excellent side cutting edge and bottom cutting edge, while the tool has the maximum cutting force, the stability and durability of the tool are ensured. Moreover, in traditional drills, it is a sharp corner, and it is very easy to break during high-feed machining. An arc is provided at the intersection of the side cutting edge and the bottom cutting edge of this tool, which can better protect the tool tip and also better reduce the cutting force.

[0017] 2. The powerful drilling tool, by setting the spiral cutting edge, main chip flute, positive cone of the chip flute, auxiliary chip flute, and spiral angle, on the premise of ensuring that the tool meets the product requirements, enables the tool to be fast, stable, balanced, and durable during the machining process, realizes an increase in the service life of the tool, improves the machining efficiency of the tool. In addition, the clamping part makes the disassembly and assembly of the tool simple and convenient, greatly shortening the time for workers to disassemble and assemble the tool, and then realizing the maximization of the output per unit time of workers, with high comprehensive cost performance. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural view of the present utility model;

[0019] Figure 2 It is a sectional view of the present utility model;

[0020] Figure 3 It is a schematic structural view of the spiral cutting edge in the present utility model;

[0021] Figure 4 is Figure 3 a partial enlarged view in

[0022] Figure 5 It is a schematic structural view of the bottom flank part in the present utility model;

[0023] Figure 6 It is a schematic structural view of the positive cone of the chip flute in the present utility model.

[0024] In the figure: 1. Cutting part; 2. Clamping part; 3. Spiral cutting edge; 4. Main chip flute; 5. Side cutting edge; 51. Side front flank; 52. Side rear flank; 53. Side main cutting edge; 6. Bottom cutting edge; 61. Bottom front flank; 62. Bottom flank part; 63. Bottom main cutting edge; 621. First bottom rear flank; 622. Second bottom rear flank; 7. Positive cone of the chip flute; 8. Auxiliary chip flute; 9. Spiral angle; 10. Arc. Detailed Description of the Preferred Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figure 1 - Figure 6In this embodiment: a powerful drilling tool comprises a cutting part 1, a clamping part 2 is fixedly connected to the bottom of the cutting part 1, the cutting part 1 comprises a plurality of spiral cutting edges 3, the plurality of spiral cutting edges 3 are arranged on the top of the clamping part 2, the outer periphery of the plurality of spiral cutting edges 3 are provided with a main chip groove 4, the main chip groove 4 is provided with a chip groove positive cone 7, the spiral cutting edge 3 comprises a lateral cutting edge 5 and a bottom cutting edge 6, the cutting part 1 and the clamping part 2 are an integral structure;

[0027] The cutting part 1 is provided with a plurality of spiral cutting edges 3 and a main chip groove 4 corresponding to the spiral cutting edges 3, which can provide sufficient cutting force while preventing chips from being entangled in the milling process or clogging the orifice, causing the tool to break or break in the part. The tool is made of cemented carbide, and the cutting part 1 and the clamping part 2 are an integral structure, thereby improving the quality of the tool itself. The main chip groove 4 is designed with a chip groove positive cone 7, and the chip groove positive cone 7 of the tool is 0.6 / 100, so that the cutting process is smooth and withstands less vibration.

[0028] The lateral cutting edge 5 comprises a lateral rake face 51, a lateral relief face 52 and a lateral main cutting edge 53. The lateral main cutting edge 53 is located at the intersection of the main chip flute 4 and the lateral relief face 52. An inverted cone is provided on the lateral relief face 52. An arc 10 is provided at the intersection of the lateral cutting edge 5 and the bottom cutting edge 6.

[0029] When processing the side wall of the workpiece, the first lateral back blade 52 plays a major cutting role. By setting a reasonable width d of the first lateral back blade 52, the strength of the lateral cutting edge 5 can be effectively enhanced, and the cutting tool can cut the workpiece more lightly and stably. In order to make the lateral cutting edge 5 fully engage the edge, the width d of the first lateral back blade 52 in this embodiment is 0.55mm, the back angle α is 0°, and the intersection of the lateral cutting edge 5 and the bottom cutting edge 6 is provided with an arc 10, which is a sharp angle in traditional drill bits and is easy to break during high-feed processing. The arc 10 designed in this example is preferably 0.5 at the intersection of the lateral cutting edge 5 and the bottom cutting edge 6, which can better protect the tool tip and also better reduce the cutting force.

[0030] The bottom cutting edge 6 includes a bottom rake face 61, a bottom back face portion 62 and a bottom main cutting edge 63. The bottom main cutting edge 63 is located at the intersection of the bottom rake face 61 and the bottom back face portion 62. The bottom back face portion 62 includes a first bottom back face 621 and a second bottom back face 622. The width of the lateral back face 52 is 0.5 mm, the back angle of the lateral back face 52 is 0°, the inverted taper is 0.2 / 100, the width of the first bottom back face 621 is 1.4 mm, and the back angle of the first bottom back face 621 is 10°.

[0031] When machining the bottom of the workpiece, the first bottom flank 621 plays a major cutting role. By setting the reasonable width L and flank angle β of the first bottom flank 621, the strength of the bottom cutting edge 6 can be effectively enhanced, and the cutting tool is more brisk and stable when cutting the workpiece. To ensure that the bottom cutting edge 6 fully engages with the workpiece, in the present utility model, the width of the first bottom flank 621 is 1.4 mm and the flank angle β is 10°.

[0032] The end of the main chip groove 4 extends along the helical cutting edge 3 to the clamping part 2. An auxiliary chip groove 8 is provided at the end of the main chip groove 4, and the length of the auxiliary chip groove 8 is 10 - 12 mm.

[0033] The end of the main chip groove 4 extends along the helix angle 9 to the clamping part 2 to form an auxiliary chip groove 8. The length of the auxiliary chip groove 8 is preferably 10 - 12 mm, which can effectively assist the milling cutter in quickly discharging chips.

[0034] A helix angle 9 is provided on the helical cutting edge 3, the helix angle 9 is 30°, and the main chip groove 4 is in the shape of an R-shaped parabola.

[0035] With the helix angle 9 being 30° and the shape of the main chip groove 4 being an R-shaped parabola, it ensures the rapid discharge of chips during the chip cutting process, avoids tool breakage caused by chip clogging, and prevents scratching of the machined surface caused by flying chips.

[0036] The runout value of the cutting part 1 is ≤0.003 μm, and the runout value of the clamping part 2 is ≤0.002 μm.

[0037] The runout of the cutting part 1 affects the machining accuracy, surface roughness, uneven tool wear, and cutting process characteristics of multi-tooth tools of the part. To maintain the stability of the machining state and machining effect, the runout value of the cutting part 1 is ≤0.003 μm. The clamping part 2 is in the shape of a cylinder and is used to fit with the inner hole for clamping by the machine tool spindle tool holder. The runout value of the clamping part 2 is ≤0.002 μm.

[0038] The working principle and usage process of the present utility model: The cutting part 1 is provided with a plurality of helical cutting edges 3 and corresponding main chip grooves 4; since the helical cutting edge 3 gradually cuts into the material, the cutting force generated by it is less likely to cause tool breakage. Even if tool breakage occurs by chance, since the diameter of the milling cutter is smaller than the threaded hole, the broken part can be easily taken out of the part without damaging the part. When machining the side wall of the workpiece, the bottom flank part 62 plays a major cutting role. By setting the reasonable width and flank angle of the first bottom flank 621, the strength of the bottom cutting edge 6 can be effectively enhanced, and the cutting tool is more brisk and stable when cutting the workpiece. To ensure that the side wall cutting edge fully engages with the workpiece, the width range of the first side flank is 1.3 - 1.5 mm, preferably 1.4 mm; the flank angle range is 9° - 11°, preferably 10°.

[0039] To ensure the smooth progress of the cutting process, it is necessary to design a reasonable main chip groove 4 and a helix angle 9 to force the chips to break strongly during the cutting process. The helix angle of this tool is set to 30°, and the shape of the chip groove is an R-shaped parabolic shape. The main chip groove 4 of the tool has a positive taper of the chip groove 7 to ensure the rapid discharge of chips during the cutting process, avoid tool breakage caused by chip clogging, prevent scratches on the machined surface caused by flying chips, and make the cutting process proceed smoothly with less vibration.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-strength drilling tool, comprising a cutting part (1), a clamping part (2) is fixedly connected to the bottom of the cutting part (1), the cutting part (1) includes a plurality of spiral cutting edges (3), and the plurality of spiral cutting edges (3) are all arranged on the top of the clamping part (2), a main chip removal groove (4) is formed on the outer periphery of each of the plurality of spiral cutting edges (3), and a chip removal groove positive cone (7) is arranged inside the main chip removal groove (4), characterized in that: The spiral cutting edge (3) includes a lateral cutting edge (5) and a bottom cutting edge (6); The lateral cutting edge (5) includes a lateral rake face (51), a lateral flank (52) and a lateral major cutting edge (53). The lateral major cutting edge (53) is located at the intersection of the main chip flute (4) and the lateral flank (52). A taper is provided on the lateral flank (52). An arc (10) is provided at the intersection of the lateral cutting edge (5) and the bottom cutting edge (6); The bottom cutting edge (6) includes a bottom rake face (61), a bottom flank portion (62) and a bottom major cutting edge (63). The bottom major cutting edge (63) is located at the intersection of the bottom rake face (61) and the bottom flank portion (62). The bottom flank portion (62) includes a first bottom flank (621) and a second bottom flank (622).

2. The high-strength drilling tool according to claim 1, characterized in that: The width of the lateral flank (52) is 0.5 mm, the back angle of the lateral flank (52) is 0°, and the taper is 0.2 / 100.

3. A powerful drilling tool according to claim 1, characterized in that: The end of the main chip flute (4) extends along the spiral cutting edge (3) to the clamping portion (2). An auxiliary chip flute (8) is provided at the end of the main chip flute (4). The length of the auxiliary chip flute (8) is 10 - 12 mm.

4. A high-strength drilling tool according to claim 1, characterized in that: The width of the first bottom flank (621) is 1.4 mm, and the back angle of the first bottom flank (621) is 10°.

5. A powerful drilling tool according to claim 1, characterized in that: A helix angle (9) is provided on the spiral cutting edge (3). The helix angle (9) is 30°. The main chip flute (4) is in an R-shaped parabolic form.

6. A powerful drilling tool according to claim 1, characterized in that: The runout value of the cutting portion (1) is ≤0.003 μm, and the runout value of the clamping portion (2) is ≤0.002 μm.

7. A high-strength drilling tool according to claim 1, characterized in that: The cutting portion (1) and the clamping portion (2) are of an integral structure.

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