CN211304907U

CN211304907U - Drill bit

Info

Publication number: CN211304907U
Application number: CN201922006439.6U
Authority: CN
Inventors: 林昌财
Original assignee: Yueqing Furong Tool No1 Factory
Current assignee: Yueqing Furong Tool No1 Factory
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-08-21
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a drill bit, comprising a main body, the one end of main part is provided with the clamping groove, the other end of main part is provided with the tool bit, the equipartition has a plurality of spiral helicine chip grooves between clamping groove and tool bit in the main part, be provided with a plurality of first blades and the second blade that are the alternative equipartition along its circumference on the tool bit, all be provided with first cutting edge on a plurality of first blades, all be provided with the second cutting edge on a plurality of second blades, a plurality of first cutting edges are the axial bending setting and assemble to the tool bit center and form a bellied top, a plurality of second cutting edges are the axial bending setting, the height that highly is higher than the second cutting edge of first cutting edge. The utility model provides a cutting ability is stronger than prior art, improves drilling quality and drilling speed's drill bit.

Description

Drill bit

Technical Field

The utility model belongs to the technical field of the drilling, especially, a drill bit.

Background

A drill bit is a tool for drilling through holes or blind holes on solid materials and reaming existing holes, and the commonly used drill bit mainly comprises a twist drill, a flat drill, a center drill, a deep hole drill and a trepanning drill.

At present, reinforced concrete structures such as urban high-rise buildings and bridge construction are mostly used in a large number of building bodies, and during the construction of the buildings, an attempt is made to drill the building bodies by using a drill. In the prior art, the drill bit comprises a cylindrical main body, a clamping groove arranged at one end of the main body and used for being connected with an electric drilling machine, and a cutter head arranged at the other end of the main body, wherein a spiral chip groove is formed in the main body. Wherein, can cut building subject when the tool bit high-speed rotation, the tool bit has a plurality of blades along the circumference equipartition, these blades can cut building subject under high-speed rotation, however, because the blade among the prior art all adopts flat cutting edge (the cutting edge is sharp setting promptly), the tool bit of flat cutting edge can form the cutting face of a circular cone through the rotation, this makes the drill bit meet the reinforcing bar in building subject in the cutting process and can appear the condition of skidding, cutting ability is relatively poor, make drilling appear crooked easily, influence drilling quality. In addition, the chip removal ability of this kind of drill bit is relatively poor, causes the cuttings to pile up in the hole easily to lead to punching inefficiency.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a drill bit which has stronger cutting capability than the prior art and improves the drilling quality and the drilling speed.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a drill bit, includes the main part, the one end of main part is provided with the clamping groove, the other end of main part is provided with the tool bit, the equipartition has a plurality of spiral helicine chip grooves between clamping groove and tool bit in the main part, be provided with a plurality of first blades and the second blade that are the alternative equipartition along its circumference on the tool bit, all be provided with first cutting edge on a plurality of first blades, all be provided with the second cutting edge on a plurality of second blades, a plurality of first cutting edges are the axial bending setting and assemble to the tool bit center and form a bellied top, a plurality of second cutting edges are the axial bending setting, the height that highly is higher than the second cutting edge of first cutting edge.

By adopting the scheme, the first blade and the second blade which are alternately and uniformly distributed are arranged on the cutter head, the first blade is converged towards the center of the cutter head to form a convex tip, so that the drill can be conveniently positioned on a building main body and prevented from slipping, in addition, the first blade and the second blade are axially bent, the cutting area of a cutting surface formed after the first blade and the second blade rotate can be increased, the contact area between the cutting surface and the building main body is increased, the drilling is more convenient, the drilling efficiency is improved, in addition, compared with the prior art, the drill is not easy to slip, particularly, when the drill is used for drilling in a reinforced concrete main body, the effect of cutting a reinforced steel bar can be achieved when the drill meets the reinforced steel bar, the drilling quality is improved, the height of the first blade is higher than that of the second blade, so that two different cutting surfaces are formed when the first blade and the second blade rotate, the contact area of the cutting face with the building body can be further increased.

As the utility model discloses a further setting, first sword is close to top position axial bending and is formed with the first sword limit of indent, first sword is kept away from top position axial and is formed with the second sword limit of evagination completely, first sword limit with the second sword limit is connected and is formed first sword limit, the second sword is to top direction extension bending and is formed with the third sword limit of indent, the second sword is kept away from top position axial bending and is formed with the fourth sword limit of evagination, the third sword limit with fourth sword limit connection formation the second sword limit.

Adopt above-mentioned scheme, can make the rotatory cutting face that forms of first sword have the arc surface of an indent and the arc surface of evagination through the first sword limit that forms the indent and the second sword limit of evagination, the arc surface of indent can improve the mobility of cuttings at the drill bit, thereby be convenient for flow the cuttings that are in the drill bit to chip groove department, the arc surface of evagination can increase area of contact, the cutting ability is improved, the chip removal ability of drill bit is improved, the second sword forms the third sword limit of indent and the fourth sword limit of evagination can further improve chip removal ability and cutting ability on the same principle.

As a further arrangement of the present invention, the second blade edge is formed with at least one convex first blade tip.

By adopting the scheme, the formed first tool nose can form an annular cutting edge for cutting after rotating, and the cutting capability can be improved through the cutting edge, so that the drilling efficiency is improved.

As a further configuration of the present invention, the fourth blade edge is bent to form a second blade tip having at least one outward protrusion.

By adopting the scheme, the cutting capability is further improved, and the drilling efficiency is improved.

As a further setting of the utility model, a plurality of spiral helicine chip grooves are extended to the one end that has the clamping groove by the position between first tool bit and the second tool bit respectively along the axial and set up.

By adopting the scheme, the chip removal groove is formed in the position between the first tool bit and the second tool bit, so that the chips formed by cutting the first tool bit and the second tool bit can be conveniently discharged out of the hole through the chip removal groove, and the flowability of the chips is improved.

The present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic exterior view of an embodiment of the present invention;

FIG. 2 is a schematic view of the tool bit according to an embodiment of the present invention, showing an appearance of the tool bit 1;

FIG. 3 is a schematic view of the tool bit according to an embodiment of the present invention, illustrating an appearance of the tool bit 2;

FIG. 4 is an enlarged view of portion A of FIG. 2;

fig. 5 is an enlarged view of a portion B in fig. 3.

Detailed Description

The utility model discloses a concrete embodiment is shown in fig. 1-5, a drill bit adopts carbide material to make, including main part 1, the one end of main part 1 is provided with clamping groove 11, the other end of main part 1 is provided with tool bit 12, the equipartition has a plurality of spiral helicine chip grooves 13 between clamping groove 11 and tool bit 12 in main part 1, be provided with a plurality of first blades 121 and the second blade 122 that are the alternative equipartition along its circumference on the tool bit 12, first blade 121 and second blade 122 are along radially protruding slightly than main part 1, and the drill bit is directly slightly big can be compared in such drilling aperture, and its purpose is in order to improve the chip removal ability of drilling, prevents that the cuttings from blockking up between drill bit main part 1 middle part and drilling. The first blades 1211 are arranged on the first blades 121, the second blades 1221 are arranged on the second blades 122, the first blades 1211 are axially bent and converge towards the center of the cutter head 12 to form a protruded tip 123 similar to a pyramid, the second blades 1221 are axially bent, and the height of the first blades 1211 is higher than that of the second blades 1221. In the embodiment, an inclined surface 124 for facilitating the powder to flow from the tool bit 12 to the chip discharging groove 13 is arranged between the first blade 121 and the second blade 122, and the inclined surface 124 extends to the tip 123, so that the tip 123 can facilitate the powder to be discharged in a rotating manner while the tip 123 drills in a rotating manner.

The first blade 1211 is bent axially at a position close to the tip 123 to form a concave first blade 1211a, the first blade 1211 is bent axially at a position far away from the tip 123 to form a convex second blade 1211b, the first blade 1211a is connected with the second blade 1211b to form the first blade 1211, the second blade 1221 extends and bends towards the tip 123 to form a concave third blade 1221a, the second blade 1221 is bent axially at a position far away from the tip 123 to form a convex fourth blade 1221b, and the third blade 1221a is connected with the fourth blade 1221b to form the second blade 1221. The first blade 1211a, the second blade 1211b, the third blade 1221a and the fourth blade 1221b can be machined by milling and then grinding, and the machining is convenient.

The second edge 1211b is bent to form at least one outwardly protruding first tip 12111.

The fourth edge 1221b is bent to form at least one convex second tip 12211.

The helical chip grooves 13 extend from the position between the first tool bit 12 and the second tool bit 12 to the end with the clamping groove 11 along the axial direction.

The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.

Claims

1. The utility model provides a drill bit, includes the main part, the one end of main part is provided with the clamping groove, the other end of main part is provided with the tool bit, the equipartition has a plurality of spiral helicine chip grooves, its characterized in that between clamping groove and tool bit in the main part: the cutter head is provided with a plurality of first blades and second blades which are alternately and uniformly distributed along the circumferential direction of the cutter head, a plurality of first blades are provided with first cutting edges, a plurality of second blades are provided with second cutting edges, the first cutting edges are axially bent and are converged towards the center of the cutter head to form a convex tip, the second cutting edges are axially bent, and the first cutting edges are higher than the second cutting edges.

2. The drill bit of claim 1, wherein: the first blade is axially bent at a position close to the tip to form a concave first blade edge, a position far away from the tip of the first blade is axially and completely formed with a convex second blade edge, the first blade edge is connected with the second blade edge to form the first blade edge, the second blade edge extends and bends towards the tip direction to form a concave third blade edge, a position far away from the tip of the second blade is axially bent to form a convex fourth blade edge, and the third blade edge is connected with the fourth blade edge to form the second blade edge.

3. The drill bit of claim 2, wherein: and at least one convex first knife tip is bent and formed on the second knife edge.

4. The drill bit of claim 2 or 3, wherein: the fourth blade edge is bent to form at least one convex second blade tip.

5. The drill bit of claim 1, wherein: the spiral chip grooves are respectively extended from the position between the first tool bit and the second tool bit to one end with the clamping groove along the axial direction.