ECU groove-shaped drill point

Abstract

Two protruding and spirally upward side edges are arranged on the side face of a cutter part, two strip-shaped edge cutters are additionally arranged on the side edge, close to the tip end of the drill point, of the front end of the cutter part, a groove between the side edges is a chip groove, a main cutting edge is arranged on the top face of the front end of the cutter part, a chisel edge is arranged on one side of the main cutting edge, and a drill point is arranged at the middle point of the chisel edge. The edge cutters are additionally arranged on the side edges, so that the problem of deformation of short slotted holes in the drilling process is solved, the drilling efficiency is improved, and the reject ratio of drilling is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of grooving technology, specifically an ECU groove-shaped drill bit. Background Technology

[0002] In existing technology, ordinary EA grooving drills do not have side cutters, which makes it easy for the hole to deviate when drilling the second cut. In conventional EA grooving production, due to the lack of side cutters, the cutting edge has no lateral support point during the processing, resulting in low efficiency and low yield.

[0003] Meanwhile, the use of single cylindrical or conical drill bits, lacking effective chip removal grooves, leads to concentrated cutting forces during drilling, easily causing excessive local stress in the material, which in turn causes hole wall cracks and hole diameter enlargement. In addition, the single chip removal path often causes chips to become clogged inside the hole, increasing cutting resistance and reducing drilling efficiency.

[0004] To address this issue, an ECU slotted drill bit is provided. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides an ECU groove-shaped drill bit to at least partially solve the above technical problems.

[0006] The technical solution adopted by this utility model is as follows:

[0007] This utility model proposes an ECU groove-shaped drill bit, including: a cutting part, a shank, a side cutter, and a neck. The cutting part has two protruding and spirally upward side cutting edges on its side. Two strip-shaped side cutters are added to the side cutting edge near the drill tip at the front end of the cutting part. The groove between the side cutting edges is a chip removal groove. The top surface of the front end of the cutting part has a main cutting edge. A transverse cutting edge is provided on one side of the main cutting edge. The midpoint of the transverse cutting edge is the drill tip. The width of the side cutter is <100μm. The side cutter is a strip-shaped structure that is symmetrical about the central axis of the drill bit.

[0008] As a further improvement of this utility model, the main cutting edge has an arc-shaped sharp corner structure.

[0009] As a further improvement of this utility model: the blade has double-sided cutting edges, and the chip removal groove has two grooves.

[0010] As a further improvement of this utility model, the helix angle is 30°-43°.

[0011] As a further improvement of this utility model, the width of the blade is 0.02mm-0.08mm.

[0012] As a further improvement of this utility model: the blade adopts a non-uniform diameter structure, and the diameter of the blade tip (side blade) is 0.02 mm to 0.04 mm larger than the diameter of the rear side blade.

[0013] Implementing the embodiments of this utility model will have the following beneficial effects:

[0014] In this embodiment, the ECU slot drill incorporates a strip-shaped edge cutter (width < 100μm) on its side cutting edge to enhance its radial cutting capability. This effectively prevents cutting deviation and slot deformation caused by uneven radial cutting force, reduces burrs from radial cutting, and results in a smoother, flatter cutting surface. In contrast, the EA type can only perform radial cutting through the side cutting edge, has weak cutting capability against the hole wall, and causes cutting deviation and slot deformation due to uneven force on the left and right sides when machining ultra-short slots.

[0015] In this embodiment, the ECU-type grooving cutter features a curved, pointed main cutting edge design, primarily to address the deformation issue in short slots. The increased rake angle at the tip of the main cutting edge results in sharper cutting, reduces the deflection force on the core drilling section, and improves hole position accuracy. This also improves the deformation problem in short slots; the increased chip removal capacity leads to better chip removal, reducing the resistance of chips to the core drilling section and increasing hole position accuracy during short slot drilling, further mitigating slot deformation. The outer edge of the main cutting edge has the fastest cutting speed and the greatest friction; the curved, pointed design extends the service life of the main cutting edge.

[0016] In this embodiment, the helix angle of the ECU-type grooving cutter ranges from 30° to 43°. The reduced helix angle helps to increase the rigidity of the grooving cutter and prevents it from breaking during drilling.

[0017] In this embodiment, the width of the ECU-type groove cutting edge ranges from 0.02 mm to 0.08 mm. The wider the cutting edge, the greater the frictional force on the hole wall. Reducing the cutting edge width can effectively reduce the frictional force on the hole wall and ensure drilling accuracy.

[0018] In this embodiment, the ECU-type grooving tool has two chip removal grooves. The addition of chip removal grooves can quickly and effectively remove waste chips, avoiding the accumulation of waste chips, which can cause excessive local stress in the material, leading to phenomena such as hole wall cracks, hole diameter expansion, and excessive drilling temperature.

[0019] In this embodiment, the ECU-type grooving tool adopts a non-uniform diameter structure. The diameter of the tip (side blade) is 0.02 mm to 0.04 mm larger than the diameter of the rear side blade, which is more conducive to heat dissipation and chip removal.

[0020] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a side view of the ECU groove-shaped drill bit proposed in an embodiment of the present invention;

[0023] Figure 2 This is a partial view of the drill tip of the ECU groove-shaped drill bit proposed in an embodiment of this utility model;

[0024] Figure 3 This is a front view of the drill tip of the ECU groove-shaped drill bit proposed in an embodiment of this utility model.

[0025] In the diagram: 1. Tool head; 2. Shank; 3. Neck; 4. Side cutter; 5. Side edge; 6. Chip groove; 7. Main cutting edge; 8. Chisel edge; 9. Drill tip.

[0026] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] It is important to note that the terms "first," "second," etc., are used only to distinguish between descriptive and positional descriptions, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with "first," etc., may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0029] In the embodiments of this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the accompanying drawings and specific circumstances.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 element 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 embodiments of this utility model.

[0031] like Figures 1 to 3 As shown, an ECU groove-shaped drill bit includes: a cutting part 1, a shank part 2, a side cutter 4, and a neck 3. The cutting part 1 has two protruding and spirally upward side cutting edges 5 on its side. Two strip-shaped side cutters 4 are added to the side cutting edge near the drill tip at the front end of the cutting part 1. The groove between the side cutting edges 5 is a chip removal groove 6. The top surface of the front end of the cutting part 1 has a main cutting edge 7. A transverse cutting edge 8 is provided on one side of the main cutting edge 7. The midpoint of the transverse cutting edge is the drill tip. The width of the side cutter 4 is <100μm. The side cutter 4 is a strip-shaped structure that is symmetrical about the central axis of the drill bit.

[0032] The main cutting edge 7 on the top surface of the cutting tool 1 is combined with the chisel edge 8 on one side, and the drill tip 9 at the top of the chisel edge 8 forms a high-efficiency cutting system. The main cutting edge 7 is responsible for the main cutting work, while the chisel edge 8 can help remove the remaining material, and the drill tip 9 ensures the accuracy and penetration when drilling, thus improving the overall cutting efficiency and quality of the drill bit.

[0033] In a specific application of this utility model embodiment, the edge cutter 4 is a symmetrical strip structure about the central axis of the drill bit. This improves the cutting efficiency and stability of the drill bit, provides more contact points when cutting into the workpiece, thereby dispersing the cutting force, reducing the vibration of the drill bit during the cutting process, and improving cutting accuracy.

[0034] In one possible implementation, the main cutting edge 7 has an arc-shaped pointed corner structure.

[0035] In one possible implementation, the blade 1 has two side blades, and the chip removal groove 6 has two grooves.

[0036] In one possible implementation, the helix angle is 30°-43°.

[0037] In one possible implementation, the blade width is 0.02mm-0.08mm.

[0038] In one possible implementation, the diameter of the blade tip (side blade) is 0.02 mm to 0.04 mm larger than the diameter of the rear side blade portion.

[0039] In specific applications of this utility model embodiment, the handle 2 provides a larger contact area, effectively distributing the stress points and reducing stress concentration, thereby enhancing the bending resistance of the connection part. Simultaneously, it also facilitates a more stable connection with the drive device, ensuring smooth and efficient power transmission.

[0040] The edge cutter 4 utilizes its sharp edge to achieve precise positioning and efficient cutting, making it suitable for machining various hard materials such as metals and ceramics. The neck 3, as the transition between the shank and the needle tip, needs to possess good rigidity and toughness to transmit torque and maintain the overall structural integrity.

[0041] ECU slotted drill bits typically form the required holes in the workpiece through high-speed rotation. The working process involves key aspects such as precise control of cutting force, effective supply of coolant, and timely removal of chips to ensure smooth processing and high standards of workpiece quality.

[0042] In practical use, ordinary EA slot drills do not have edge cutters, which can easily cause the hole to deviate when drilling the second cut. This embodiment adds chip removal grooves and edge cutters to solve the problem of slot deformation during the drilling process, while improving drilling efficiency and reducing the failure rate of drilling.

[0043] Meanwhile, the helix angle is set to 30-43 degrees. Conventional EA grooving tools, due to their single chip flute and lack of edge support, result in low efficiency and low yield during machining because the cutting edge has no lateral support point. Switching to ECU with an edge support increases efficiency by 2 times and improves yield by 10%.

[0044] The cutting tool adopts a non-uniform diameter structure. The diameter of the tip (side cutting edge) is 0.02-0.04 mm larger than the diameter of the rear side cutting edge. During the actual drilling process, there is a gap between the side cutting edge and the hole wall, which is conducive to heat dissipation and waste chip removal.

[0045] Compared to the EA type, it improves the grooving efficiency by about 5%.

[0046] Meanwhile, the cutting edge is made of ultra-fine tungsten carbide cemented carbide, and the shank is made of 420F white iron, giving the drill bit better rigidity.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An ECU slotted drill bit, characterized in that, include: The tool consists of a cutting head (1), a shank (2), a side cutter (4), and a neck (3). The cutting head (1) has two protruding and spirally upward side cutting edges (5) on its side. Two strip-shaped side cutters (4) are added to the side cutting edge near the drill tip at the front end of the cutting head (1). The groove between the side cutting edges (5) is a chip removal groove (6). The top surface of the front end of the cutting head (1) has a main cutting edge (7). A transverse cutting edge (8) is provided on one side of the main cutting edge (7). The midpoint of the transverse cutting edge is the drill tip. The width of the side cutter (4) is <100μm. The side cutter (4) has a left-right symmetrical strip structure.

2. The ECU slotted drill bit according to claim 1, characterized in that, The main cutting edge (7) has an arc-shaped sharp corner structure.

3. The ECU slotted drill bit according to claim 1, characterized in that, The cutting edge (1) has two sides, and the chip removal groove (6) consists of two grooves.

4. The ECU slotted drill bit according to claim 1, characterized in that, The blade width is 0.02mm-0.08mm.

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