CN205684786U - A cutter head structure of a drill bit - Google Patents

Abstract

The utility model provides a tool bit structure of drill bit belongs to mechanical tool technical field. It has solved the technical problem such as current drill bit drilling efficiency hangs down. The cutter head structure of drill bit includes the body, and the body is cross cylinder, has the first cutting edge of constituteing by two relative cutting edges and the second cutting edge of constituteing by two other relative cutting edges on the body, and four cutting edges are located the body all around and all set up along the direction of height of body, and four cutting edges all have the arc flank to body central line slope, and the arc flank of two cutting edges of first cutting edge gathers a little and forms the knife tip, has the interval between the arc flank of two cutting edges of second cutting edge and the knife tip. The utility model provides a be equipped with four cutting edges on the drill bit tool bit, the knife tip passes through four cutting edges at once and carries out the smear metal after accomplishing the drilling of initial position, and cutting efficiency improves greatly.

Description

A cutter head structure of a drill bit

technical field

The utility model belongs to the technical field of mechanical tools and relates to a drill head structure.

Background technique

Drill bit is a common tool for mechanical processing or production operations. It can drill holes in workpieces or construction objects. It is used in various electric drills, drilling machines or drilling machines. It has a wide range of uses, and there are various types of drill bits. Usually drill bits They all include a cutter bar, the cutter bar has a tip, the tip has a cutting edge, and the tool bar also has chip removal grooves. When in use, the drill bit rotates around the vertical axis and moves axially at the same time. Under the torque and axial force of the drill bit, the workpiece or construction object is cut out of the hole, and the debris is discharged from the chip flute.

my country's patent literature (notification number: CN203592176U; announcement date: 2014-05-14) discloses a new type of perforating drill bit, including a drill rod and a cutting tool. The chute that fits the knife, the chute passes through the center of the connecting piece and divides the connecting piece into a first protective part and a second protective part. The cutting knife includes two arc-shaped cutting edges, and the two arc-shaped cutting edges connect Combined to form a tool tip with an angle of less than 90 degrees; the protection part is an inclined block with one end thicker and the other end thinner. The drill pipe is welded to the cutting tool, and the drill pipe is provided with a chip removal thread on the peripheral side.

Contents of the invention

The utility model aims at the above-mentioned problems existing in the existing technology, and provides a cutter head structure of a drill bit. The technical problem to be solved by the utility model is: how to improve the drilling efficiency when the drill bit is used.

The purpose of this utility model can be achieved through the following technical solutions:

A cutter head structure of a drill bit, comprising a body, characterized in that the body is a cross-shaped cylinder, and the body has a first cutting edge composed of two opposite cutting edges and another two opposite cutting edges. The four cutting edges are located around the body and are all arranged along the height direction of the body. The four cutting edges all have arc-shaped edge surfaces inclined to the centerline of the body. The two sides of the first blade The arc-shaped edge surfaces of the first cutting edge gather at one point to form a knife tip, and there is a distance between the arc-shaped edge surfaces of the two cutting edges of the second cutting edge and the tool tip.

In the above drill head structure, the arc-shaped edge surfaces of the two cutting edges of the second cutting edge are respectively located on both sides of the tip and have arc-shaped grooves between the side walls on both sides of the tip. This prevents the interference and influence of the second cutting edge on the starting position of the workpiece drilling, and facilitates the rapid and smooth transition of the cutting edge from two cutting edges to four cutting edges through the arc-shaped groove.

The utility model also discloses a drill rod structure matched with the above-mentioned drill bit, which includes a cylindrical rod body. The end of the rod body forms a cross slot, and the outer peripheral surface of the drill rod is provided with a spiral chip removal groove, and each of the petals is provided with a diversion groove, and the diversion groove is along the length direction of the drill rod. Set and communicate with the flute.

In the above-mentioned drill rod structure of the drill bit, the chip removal grooves are double-row spiral grooves, the chip removal grooves extend to the notch of the cross slot, and the two adjacent flow guide grooves are connected with one of the rows. The chip flutes are connected, and the other two adjacent guide grooves are connected with another chip flute. In this way, waste chips can be discharged quickly and smoothly, which is conducive to improving drilling efficiency.

In the above drill rod structure of the drill bit, the petals are located on the end surface of the rod body and are evenly spaced along the circumference of the rod body. In this way, the four cutting edges are evenly spaced to ensure that the effects of each cutting edge are consistent and the drilling efficiency is improved.

In the above-mentioned drill rod structure of the drill bit, the petal body and the rod body are integrally formed. In this way, the connection strength of the entire drill pipe is guaranteed, and the production process is reduced, and the processing is convenient and quick.

In the above-mentioned drill rod structure of the drill bit, the outer surface of the petal body is an arc surface, and the thickness of the petal body gradually decreases from the joint between the petal body and the rod body to the outer end. The shape and structure of the valve body matches the arc-shaped edge surface of the cutting edge of the cutter head, reducing the interference and influence of the drill rod on the cutter head when drilling.

The above-mentioned drill rod and cutter head are used together, and the drill bit is formed by welding the cutter head in the cross slot at the end of the drill rod. There are four cutting edges on the cutter head, and the cutter tip is only composed of two opposite cutting edges. There is a certain distance between the other two opposite cutting edges and the tool tip. The distance is very small. After the tool tip completes the drilling at the initial position, it immediately transitions to the four cutting edges for cutting chips. When the drill pipe rotates at a certain speed In the case of cutting, the cutting efficiency is increased by 2 times, and the strength of the cutter head is stronger, and the cutting edge is not easy to be damaged.

Compared with the prior art, in the utility model, there are four cutting edges on the drill head, and the cutting edge is formed by two of the opposite cutting edges, and there is a certain distance between the other two opposite cutting edges and the cutting edge , the distance is very small, the tool tip transitions to the four cutting edges immediately after drilling at the initial position for cutting chips, and the cutting efficiency is greatly improved when the drill rod rotates at a certain speed, and the strength of the tool head is greater , the cutting edge is not easily damaged.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the drill bit.

Fig. 2 is a schematic diagram of the three-dimensional structure of the drill rod in the drill bit.

Fig. 3 is a schematic diagram of the three-dimensional structure of the cutter head in the drill bit.

In the figure, 1, rod body; 11, chip removal groove; 12, guide groove; 13, petal body; 14, cross slot; 2, body; 21, cutting edge; 21a, arc-shaped edge surface; 22, tip ; 23, arc groove.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Ordinary drills in the prior art usually only have two cutting edges facing each other, so that the tip formed by the two cutting edges is sharper, which is convenient for efficient work when pulling out the drill. However, due to the limited number of cutting edges and the drill rod The rotational speed of the drill bit is limited, resulting in low efficiency of drilling chips; the drill bit in this technical solution is improved on this basis, as shown in Figure 1 and Figure 3, the cutter head structure of the drill bit includes a body 2, and the body 2 is a cross-shaped Cylinder, the body 2 has a first cutting edge consisting of two opposite cutting edges 21 and a second cutting edge consisting of other two opposite cutting edges 21, the four cutting edges 21 are located around the body 2 and all along the body 2, the four cutting edges 21 all have arc-shaped edge surfaces 21a inclined to the center line of the body 2, and the arc-shaped edge surfaces 21a of the two cutting edges 21 of the first blade gather at one point to form a knife tip 22, and the second There is a distance between the arc-shaped edge surfaces 21a of the two cutting edges 21 of the second blade and the tip 22; There is an arc-shaped groove 23 between the side walls on both sides. This prevents the interference and influence of the second cutting edge on the starting position of the workpiece drilling, and facilitates the rapid and smooth transition of the cutting edge from the two cutting edges 21 to the four cutting edges 21 through the arc-shaped groove 23 .

As shown in Figures 1 and 2, the drill rod structure of this drill bit includes a cylindrical rod body 1, and the end of the rod body 1 has four petal bodies 13 arranged at intervals, and the four petal bodies 13 form a cross at the end of the rod body 1. Slots 14, the outer peripheral surface of the drill rod is provided with a spiral chip removal groove 11, and each petal body 13 is provided with a diversion groove 12, and the diversion groove 12 is arranged along the length direction of the drill rod and connected with the chip removal groove 11 connected; the chip removal groove 11 is a double-row spiral groove, the chip removal groove 11 extends to the notch of the cross slot 14, two adjacent guide grooves 12 communicate with one of the chip removal grooves 11, and the other two Adjacent guide grooves 12 communicate with another chip removal groove 11 . This facilitates quick and smooth discharge of waste and is beneficial to improving drilling efficiency; the petals 13 are located on the end surface of the rod body 1 and are evenly spaced along the circumference of the rod body 1 . In this way, the four cutting edges 21 are evenly spaced to ensure that the functions of each cutting edge 21 are consistent and improve the drilling efficiency; the petal body 13 and the rod body 1 are integrally formed. In this way, the connection strength of the whole drill pipe is guaranteed, and the production process is reduced, and the processing is convenient and fast; The shape and structure of the petal body 13 matches the arc-shaped edge surface 21a of the cutter head cutting edge 21, reducing the interference and influence of the drill rod on the cutter head when drilling.

The above-mentioned drill rod and cutter head are used together, and the drill bit is formed by welding the cutter head in the cross slot 14 at the end of the drill rod. The cutter head is provided with four cutting edges 21, and the cutter tip 22 is only formed by two opposite cutting edges. There is a certain distance between the other two opposite cutting edges 21 and the tool nose 22, the distance is very small, and the tool nose 22 transitions to the four cutting edges 21 immediately after drilling at the starting position. Cutting chips, under the condition of constant drill rod speed, the cutting efficiency is increased by 2 times, and the strength of the cutter head is greater, and the cutting edge 21 is not easy to be damaged.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses more 1, rod body; 11, chip removal groove; 12, diversion groove; 13, petal body; 14, cross slot; 2, body; 21, cutting edge; 22. Knife tip; 23. Terms such as arc-shaped grooves, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (2)

1. a cutter head structure for drill bit, including body (2), it is characterised in that described body (2) in cross cylinder, institute State have on body (2) the first blade of being made up of two relative cutting edges (21) with by two other relative cutting edge (21) the second blade formed, four described cutting edges (21) are positioned at the surrounding of described body (2) and all along the height of body (2) Direction is arranged, and four cutting edges (21) are respectively provided with the arc blade surface (21a) to body (2) centerline dip, the two of the first blade The arc blade surface (21a) of individual cutting edge (21) gathers and a little forms point of a knife (22), two cutting edges (21) of the second blade Between arc blade surface (21a) and point of a knife (22), there is spacing.

The cutter head structure of drill bit the most according to claim 1, it is characterised in that two cutting edges (21) of the second blade Arc blade surface (21a) lay respectively at point of a knife (22) both sides and and the sidewall of point of a knife (22) both sides between there is arc groove (23).