Supporting screw drill bit

Abstract

The utility model discloses a branch screw drill bit which comprises a drill rod and a drill handle which are integrally formed, a spiral cutting edge is arranged in the length direction of the drill rod, a conical screw tip is arranged at the front end of the spiral cutting edge, a spiral edge is arranged on the periphery of the conical screw tip, and the length of the spiral cutting edge is larger than the sum of the length of the drill rod and the length of the drill handle. And vent holes penetrating through the spiral cutting edge are formed in two vertical side surfaces of the spiral cutting edge. Under the condition that drilling cuttings are kept to be good, the overall heat dissipation effect can be good, the overall service life can be greatly prolonged, and the use requirement can be better met.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a drill bit. Background Art

[0002] It is known that drill bits are usually used for wood processing. Existing drill bits are mostly made of ordinary metal in one piece. The cutter head is easily worn out after being used for a period of time, resulting in the drill bit being scrapped and having a short service life. Therefore, there is a Chinese utility model patent with authorization announcement number CN218253051 U, which discloses a tungsten steel drill bit, including an integrally formed drill rod and a drill shank. A spiral cutting edge is provided along the length direction of the drill rod. A tungsten cutter head is welded to the top of the spiral cutting edge. The tungsten cutter head is welded on the top of the spiral cutting edge. The cutter head made of tungsten steel has better wear resistance and can greatly improve the service life of the drill bit. Since this drill bit is running at high speed, the drill bit itself will generate a lot of heat. If the heat cannot be dissipated in time, it will easily cause damage to the drill bit. Therefore, in order to improve the service life of the drill bit, it is necessary to improve the existing technology. Utility Model Content

[0003] 1. Technical issues that need to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a drill bit which can achieve good overall heat dissipation while maintaining good quality of drill cuttings, thereby greatly improving the overall service life and being more conducive to meeting usage requirements.

[0005] (II) Technical solutions that need to be adopted

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A drill bit comprises an integrally formed drill rod and a drill shank, a spiral cutting edge is arranged along the length direction of the drill rod, a conical spiral tip is arranged at the front end of the spiral cutting edge, a spiral edge is arranged at the outer periphery of the conical spiral tip, the length of the spiral cutting edge is greater than the sum of the lengths of the drill rod and the drill shank, and two vertical side surfaces of the spiral cutting edge are provided with ventilation holes penetrating the spiral cutting edge.

[0008] Preferably, a tungsten cutter head is welded to the top of the spiral cutting edge, and the cutter head is made of tungsten steel or alloy material.

[0009] Preferably, the tungsten cutter head comprises a main body block welded to the spiral cutting edge and a main cutting edge integrally formed with the main body block, and an angle a between the side surface of the main cutting edge and the end surface of the main body block is 140° to 150°.

[0010] Preferably, the main body block is provided with an auxiliary blade, the auxiliary blade is parallel to the main blade, and the auxiliary blade is integrally formed with the main body block.

[0011] Preferably, the diameter of the spiral blade gradually increases from top to bottom.

[0012] Preferably, the width of the chip groove on the spiral cutting edge is greater than the width of the blade body on the spiral cutting edge.

[0013] Preferably, a transition portion is provided between the drill rod and the drill shank, and the drill shank has a hexagonal transverse cross-section, and an annular groove is provided at one end of the drill shank away from the drill rod.

[0014] Preferably, the surfaces of the drill rod, the drill shank and the transition portion are all coated with Teflon coating.

[0015] (III) Technical effects to be achieved

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] Firstly, the utility model is provided with a spiral cutting edge along the length direction of the drill rod, a conical spiral tip is provided at the front end of the spiral cutting edge, a spiral edge is provided at the outer periphery of the conical spiral tip, the length of the spiral cutting edge is greater than the sum of the lengths of the drill rod and the drill shank, and two vertical side surfaces of the spiral cutting edge are provided with ventilation holes penetrating the spiral cutting edge. While maintaining the quality of drill cuttings, the ventilation holes can achieve a good effect of overall heat dissipation, thereby greatly improving the overall service life and being more conducive to meeting the use requirements.

[0018] Secondly, the length of the spiral cutting edge of the utility model is greater than the sum of the lengths of the drill rod and the drill shank, which is more conducive to increasing the depth of the drill hole and the drill groove, is more conducive to satisfying the use, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of an explosion of an embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of a tungsten cutter head in an embodiment of the utility model.

[0023] In the figure: 1, drill rod; 2, drill shank; 3, spiral cutting edge; 4, conical spiral tip; 5, spiral blade; 6, vent hole; 7, cutter head; 21, annular groove; 31, chip groove; 32, blade body; 71, main block; 72, main blade; 73, secondary blade. DETAILED DESCRIPTION

[0024] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0028] Example 1: See Figure 1 , Figure 2 and Figure 3 A drill bit includes an integrally formed drill rod 1 and a drill shank 2, a spiral cutting edge 3 is arranged along the length direction of the drill rod 1, a conical spiral tip 4 is arranged at the front end of the spiral cutting edge 3, a spiral blade 5 is arranged at the outer periphery of the conical spiral tip 4, and the length of the spiral cutting edge 3 is greater than the sum of the lengths of the drill rod 1 and the drill shank 2. This arrangement is more conducive to increasing the depth of the drill groove or drill hole, and is also conducive to chip removal. The two vertical side surfaces of the spiral cutting edge 3 are provided with air vents 6 that penetrate the spiral cutting edge 3. The air vents 6 can improve the heat dissipation efficiency of the spiral cutting edge 3, and can also play a certain role in chip removal, greatly improving the service life, and better meeting the use requirements. The conical spiral tip 4 has a self-tapping effect, and the conical spiral tip 4 is provided with a spiral blade 5 at its outer periphery, which is conducive to quickly increasing the cutting speed and sharpness.

[0029] Embodiment 2: It can be explained on the basis of embodiment 1, such as Figure 2 and Figure 3 As shown, a cutter head 7 is welded on the top of the spiral cutting edge 3. The cutter head 7 is made of tungsten steel or alloy material. By welding the cutter head 7 on the top of the spiral cutting edge 3, the cutter head 7 made of tungsten steel or alloy material has better wear resistance, which is also conducive to improving its sharpness, and can greatly improve the service life of the utility model. While ensuring the manufacturing cost, it greatly improves the service life of the utility model. Figure 4 As shown, specifically, the tungsten cutter head 7 includes a main block 71 welded to the spiral cutting edge 3 and a main blade 72 integrally formed with the main block 71, the angle a between the side surface of the main blade 72 and the end surface of the main block 71 is 140°~150°, and an auxiliary blade 73 is arranged on the main block 71, the auxiliary blade 73 and the main blade 72 are parallel to each other, and the auxiliary blade 73 and the main block 71 are integrally formed, which not only greatly improves the overall firmness, but also improves the cutting ability, and is more conducive to cutting.

[0030] Embodiment 3: It can be described on the basis of Embodiment 1 or Embodiment 2, such as Figure 1 , Figure 2 and Figure 3As shown, the diameter of the spiral blade 5 gradually increases from top to bottom. By setting the conical spiral tip 4 and the spiral blade 5, they can be quickly positioned and pre-drilled, which is beneficial to reduce the cutting pressure of the subsequent blade and increase the service life of the utility model. Secondly, the diameter of the spiral blade 5 gradually increases from top to bottom, which is beneficial to chip removal, thereby facilitating drilling and grooving.

[0031] Embodiment 4: It can be described on the basis of Embodiment 1, Embodiment 2 or Embodiment 3, such as Figure 1 , Figure 2 and Figure 3 As shown, the width of the chip removal groove 31 on the spiral cutting edge 3 is greater than the width of the blade body 32 on the spiral cutting edge 3. This arrangement is more conducive to chip removal.

[0032] Embodiment 5: Based on Embodiment 1 or Embodiment 2 or Embodiment 3 or Embodiment 4, as shown in FIG. Figure 1 , Figure 2 and Figure 3 As shown, a transition portion is provided between the drill rod 1 and the drill handle 2, and the cross-section of the drill handle 2 is hexagonal, and an annular groove 21 is provided at the end of the drill handle 2 away from the drill rod 1, which is more reasonably arranged, more conducive to connection with the outside, and more stable. The surfaces of the drill rod 1, the drill handle 2 and the transition portion are coated with Teflon coating, which increases the service life.

[0033] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt conventional means such as mature bolts and rivets in the prior art, which will not be described in detail here.

[0034] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structural or equivalent process changes made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the utility model patent.

Claims

1. A drill bit, comprising an integrally formed drill rod (1) and a drill shank (2), characterized in that: A spiral cutting edge (3) is arranged along the length direction of the drill rod (1), a conical spiral tip (4) is arranged at the front end of the spiral cutting edge (3), a spiral edge (5) is arranged on the outer periphery of the conical spiral tip (4), the length of the spiral cutting edge (3) is greater than the sum of the lengths of the drill rod (1) and the drill shank (2), and two vertical side surfaces of the spiral cutting edge (3) are provided with ventilation holes (6) penetrating the spiral cutting edge (3).

2. The drill bit according to claim 1, characterized in that: A cutter head (7) is welded to the top of the spiral cutting edge (3), and the cutter head (7) is made of tungsten steel or alloy material.

3. The drill bit according to claim 2, characterized in that: The cutter head (7) comprises a main body block (71) welded to the spiral cutting edge (3) and a main cutting edge (72) integrally formed with the main body block (71); an angle a between the side surface of the main cutting edge (72) and the end surface of the main body block (71) is 140° to 150°.

4. The drill bit according to claim 3, characterized in that: The main body block (71) is provided with an auxiliary blade (73), the auxiliary blade (73) and the main blade (72) are parallel to each other, and the auxiliary blade (73) and the main body block (71) are integrally formed.

5. The drill bit according to claim 1, 2, 3 or 4, characterized in that: The diameter of the spiral blade (5) gradually increases from top to bottom.

6. The drill bit according to claim 1, 2, 3 or 4, characterized in that: The width of the chip removal groove (31) on the spiral cutting edge (3) is greater than the width of the blade body (32) on the spiral cutting edge (3).

7. The drill bit according to claim 1, 2, 3 or 4, characterized in that: A transition portion is provided between the drill rod (1) and the drill shank (2), and the drill shank (2) has a hexagonal transverse cross section. An annular groove (21) is provided at one end of the drill shank (2) away from the drill rod (1).

8. The drill bit according to claim 7, characterized in that: The surfaces of the drill rod (1), the drill shank (2) and the transition portion are all coated with a Teflon coating.

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