Salad drill

Abstract

The utility model belongs to the technical field of drill bit machining, and particularly relates to a salad drill which comprises a drillstock, a first chip groove, a second chip groove, a first drill bit, a second drill bit and a second drill bit. The drill core is mounted in the drill handle and comprises a drilling blade and two second chip grooves, the drilling blade is arranged at the head of the drill core, the two second chip grooves are formed in the peripheral side of the drill core, and one second chip groove is communicated with the first chip groove; the first counter bore blade is arranged on the drill handle and used for machining a counter bore; the second counter bore blade is arranged on the drill handle and used for trimming the contour of the counter bore; the counter bore cutter has the advantages that the first counter bore cutting edge firstly cuts the surface of a material, a step-shaped counter bore structure is machined outside the bore diameter, then the second counter bore cutting edge makes contact with the bottom face of a counter bore to cut the bottom face of the counter bore into a flat face. And it is guaranteed that the machined counter bore structure can enable the head of the fastener to be completely hidden in the material, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bit processing, and particularly relates to a salad drill bit. Background Art

[0002] As an important part of the cutting tools for mechanical processing, common drill bits mainly include twist drills, flat drills, center drills, salad drill bits, etc.

[0003] At present, a salad drill bit generally consists of a drill core in the cutting part and a drill shank in the clamping part, and a cutting edge for processing a counterbore structure is provided on the drill shank. During use, the drill core is mainly used for drilling, and the cutting edge on the drill shank is used for counterbore processing. In the prior art, the cutting edges for counterbore processing on most salad drill bits are only used for the cutting processing of the stepped counterbore, and it is easy to have the situation that the bottom surface of the counterbore is not flat enough, which easily leads to the screw head installed not being able to completely sink into the material, affecting the use and appearance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a salad drill bit to solve the above-mentioned technical problems for the existing technical problems.

[0005] In view of this, the utility model provides a salad drill bit, including:

[0006] A drill shank, the drill shank includes a first chip flute, and the first chip flute is arranged on the circumferential side of the drill shank;

[0007] A drill core, the drill core is installed in the drill shank, the drill core includes a drilling cutting edge and two second chip flutes, the drilling cutting edge is arranged at the head of the drill core, and the two second chip flutes are arranged on the circumferential side of the drill core and one of the second chip flutes is communicated with the first chip flute;

[0008] A first counterbore cutting edge, the first counterbore cutting edge is arranged on the drill shank and is used for processing a counterbore;

[0009] A second counterbore cutting edge, the second counterbore cutting edge is arranged on the drill shank and is used for trimming the counterbore contour.

[0010] Further, both the first chip flute and the second chip flute are arranged in a spiral shape.

[0011] Further, the depth of the first chip flute is greater than the depth of the second chip flute.

[0012] Further, a positioning drill tip is also arranged at the head of the drill core.

[0013] Further, both the first counterbore cutting edge and the second counterbore cutting edge are integrally connected with the drill shank.

[0014] Further, the drill core and the drill shank are connected by setting fasteners.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. When the core bit drills deeply into the hole, the first counterbore cutting edge first cuts with the surface of the material, machining a stepped counterbore structure outside the hole diameter. Then, the second counterbore cutting edge contacts the bottom surface of the counterbore and cuts, machining the bottom surface of the counterbore into a flat surface. Thus, it is ensured that the machined counterbore structure can completely hide the head of the fastener inside the material, with high practicality.

[0017] 2. A first chip evacuation groove is provided on the drill shank, so that the wood chips generated by the cutting of the first counterbore cutting edge and the second counterbore cutting edge will be discharged through the first chip evacuation groove. And the first chip evacuation groove is also connected to one of the second chip evacuation grooves, so that the wood chips generated by the cutting of the drilling cutting edge on the core bit can enter the first chip evacuation groove through the second chip evacuation groove and then be discharged outside the hole. It can accelerate the chip evacuation efficiency during hole opening, thereby reducing the resistance during the hole opening process and improving the hole opening efficiency. Description of the Drawings

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

[0019] Figure 2 is a schematic structural view of another perspective of the present utility model;

[0020] The markings in the figure are shown as:

[0021] 1. Drill shank; 11. First chip evacuation groove; 2. Core bit; 21. Drilling cutting edge; 22. Second chip evacuation groove; 23. Positioning drill tip; 3. First counterbore cutting edge; 4. Second counterbore cutting edge. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0023] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] Embodiment 1:

[0025] This embodiment provides a salad drill, including:

[0026] A drill shank 1, the drill shank 1 includes a first chip flute 11, and the first chip flute 11 is arranged on the circumferential side of the drill shank 1;

[0027] A drill core 2, the drill core 2 is installed in the drill shank 1, the drill core 2 includes a drilling cutting edge 21 and two second chip flutes 22, the drilling cutting edge 21 is arranged at the head of the drill core 2, and the two second chip flutes 22 are arranged on the circumferential side of the drill core 2 and one of the second chip flutes 22 communicates with the first chip flute 11;

[0028] A first counterbore cutting edge 3, the first counterbore cutting edge 3 is arranged on the drill shank 1 and is used for machining a counterbore;

[0029] A second counterbore cutting edge 4, the second counterbore cutting edge 4 is arranged on the drill shank 1 and is used for trimming the counterbore profile.

[0030] In this technical solution, an installation hole is axially provided in the drill shank 1, the drill core 2 is fixedly installed in the installation hole of the drill shank 1, the head of the drill core 2 is exposed outside the drill shank 1, and two integrally structured drilling cutting edges 21 are arranged at the head of the drill core 2, and the drilling cutting edges 21 can play a role in cutting and drilling. It is worth noting that the drill core 2 is made of alloy material, and has a longer service life and higher durability compared with the tools made of high-speed steel or bearing steel existing in the market. Two second chip flutes 22 are provided on the circumferential side of the drill core 2. When the drilling cutting edges 21 rotate to cut wood, the wood chips generated by cutting will be discharged through the two second chip flutes 22, avoiding the accumulation of wood chips in the hole and affecting the processing.

[0031] At the end of the drill shank 1 near the head of the drill core 2, a first counterbore cutting edge 3 and a second counterbore cutting edge 4 are also provided. The end of the first counterbore cutting edge 3 is sharp, and the end of the second counterbore cutting edge 4 is inclined and flat, and the end of the first counterbore cutting edge 3 is slightly lower than the end of the second counterbore cutting edge 4. When the drill core 2 penetrates into the drilled hole, the first counterbore cutting edge 3 first cuts with the surface of the material to machine a stepped counterbore structure outside the hole diameter. Then, the second counterbore cutting edge 4 contacts the bottom surface of the counterbore and cuts to machine the bottom surface of the counterbore into a flat surface. Thus, it is ensured that the machined counterbore structure can completely hide the head of the fastener inside the material, with high practicality.

[0032] A first chip groove 11 is provided in the drill shank 1, so that the wood chips generated by the cutting of the first counterbore cutting edge 3 and the second counterbore cutting edge 4 will be discharged through the first chip groove 11. And the first chip groove 11 is also connected to one of the second chip grooves 22, so that the wood chips generated by the cutting of the drilling cutting edge 21 on the drill core 2 can enter the first chip groove 11 through the second chip groove 22 and then be discharged outside the hole. Through this structural design, the chip removal efficiency during hole opening can be accelerated, thereby reducing the resistance during the hole opening process and effectively improving the hole opening efficiency, with high practicality.

[0033] Furthermore, both the first chip groove 11 and the second chip groove 22 are arranged in a spiral shape. Through this structural design, in cooperation with the centrifugal force generated during rotary cutting, it can play a guiding role for the chips, and the chips are naturally discharged outside the hole along the path of the spiral groove, avoiding chip accumulation and blockage. At the same time, the timely discharge of the chips can reduce the friction with the hole wall or the drill bit body, reduce heat accumulation, and extend the life of the drill bit.

[0034] Furthermore, the depth of the first chip groove 11 is greater than the depth of the second chip groove 22. Through this structural design, the first chip groove 11 can meet the timely discharge of the wood chips generated by the cutting of the first counterbore cutting edge 3 and the second counterbore cutting edge 4 and the wood chips generated by the cutting of the drilling cutting edge 21 at the same time, effectively avoiding chip accumulation and blockage, with high practicality.

[0035] Embodiment 2:

[0036] This embodiment provides a salad drill. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0037] Furthermore, a positioning drill tip 23 is also provided at the head of the drill core 2.

[0038] Through this structural design, it helps to position during the drilling process of the head of the drill core 2, prevent the head of the drill core 2 from sliding, effectively enhance the cutting stability during drilling, and improve the cutting efficiency.

[0039] Embodiment 3:

[0040] This embodiment provides a salad drill. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0041] Furthermore, both the first counterbore cutting edge 3 and the second counterbore cutting edge 4 are integrally connected to the drill shank 1.

[0042] In this technical solution, both the first counterbore cutting edge 3 and the second counterbore cutting edge 4 are made of alloy material, so that the first counterbore cutting edge 3 and the second counterbore cutting edge 4 have a longer service life and higher durability. The first counterbore cutting edge 3 and the second counterbore cutting edge 4 are fixed to the drill shank 1 by welding, effectively enhancing the connection firmness between the first counterbore cutting edge 3 and the second counterbore cutting edge 4 and the drill shank 1, making the first counterbore cutting edge 3 and the second counterbore cutting edge 4 more stable when cutting materials.

[0043] Embodiment 4:

[0044] This embodiment provides a salad drill. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0045] Furthermore, the drill core 2 and the drill shank 1 are connected by setting fasteners.

[0046] In this technical solution, a radially arranged fixing hole is formed in the drill shank 1. The drill core 2 is slidably installed in the installation hole of the drill shank 1, and then by installing a fastener at the fixing hole, the drill core 2 is fixed to the drill shank 1 by using the fastener to press against the drill core 2. Through this structural design, the user can adjust the position of the drill core 2 in the installation hole by sliding to adjust the length of the drill core 2 exposed outside the drill shank 1, so as to adjust the drilling depth, with high practicability.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A salad drill, characterized in that: include: A drill shank (1), the drill shank (1) comprising a first chip removal groove (11), the first chip removal groove (11) being arranged on a circumferential side of the drill shank (1); A drill core (2), the drill core (2) being installed in a drill shank (1), the drill core (2) comprising a drilling blade (21) and two second chip removal grooves (22), the drilling blade (21) being arranged on the head of the drill core (2), the two second chip removal grooves (22) being arranged on the peripheral side of the drill core (2) and one of the second chip removal grooves (22) being connected to the first chip removal groove (11); A first countersinking blade (3), the first countersinking blade (3) being arranged on the drill shank (1) and being used for processing a countersink; A second countersinking blade (4), wherein the second countersinking blade (4) is arranged on the drill shank (1) and is used for trimming the countersinking profile.

2. A salad drill according to claim 1, characterized in that: The first chip removal groove (11) and the second chip removal groove (22) are both arranged in a spiral shape.

3. A salad drill according to claim 1, characterized in that: The depth of the first chip removal groove (11) is greater than the depth of the second chip removal groove (22).

4. A salad drill according to claim 1, characterized in that: The head of the drill core (2) is also provided with a positioning drill tip (23).

5. The salad drill according to claim 1, characterized in that: The first countersink blade (3) and the second countersink blade (4) are both integrally connected to the drill shank (1).

6. The salad drill according to claim 1, characterized in that: The drill core (2) and the drill shank (1) are connected by means of a fastener.

Images