CN210996690U

CN210996690U - Percussion drill bit for punching composite material

Info

Publication number: CN210996690U
Application number: CN201921607173.4U
Authority: CN
Inventors: 林昌方
Original assignee: Fangda Holding Co ltd
Current assignee: Fangda Holding Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-07-14
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a percussion drill for combined material punches, including the drillstock and bore the body, the drillstock is connected with boring the body, bores and is equipped with spiral chip groove on the body, bores the body other end and is equipped with the cutting edge draw-in groove, and it has the cutting edge to inlay in the draw-in groove, and the cutting edge includes main cutting edge, chisel edge, back knife face and edge, two main cutting edge slope cross-connects, connects the edge and forms the chisel edge, back knife face extends to the cutting edge lateral wall along the main cutting edge slope. The utility model discloses have better cutting ability, the chip removal is more smooth and easy, and the location ability is strong.

Description

Percussion drill bit for punching composite material

Technical Field

The utility model relates to a drilling technical field indicates a percussion bit especially.

Background

At present, stagger each other by two main cutting edges and all formed the broad chisel edge in the center department of percussion bit who uses, if used the broad chisel edge, can have the inaccurate condition of location to take place, because in work, the broad chisel edge can lead to centering accuracy poor, the position of drill core takes place the skew easily, and it is very big to locate the axial resistance at the drill core, when realizing drilling, just need the predrilling, increase labourer's amount of labour, the main cutting edge who adopts simultaneously is the main cutting edge that is formed by two back knife face slopes, the cutting dynamics of such main cutting edge when drilling is not strong, lead to when predrilling, the time of consumption increases.

Disclosure of Invention

In order to solve the problem, the utility model provides a percussion bit for combined material punches, its main objective is the positioning accuracy when improving drilling through the less chisel edge of design, provides the cutting edge that the cutting dynamics is stronger simultaneously.

In order to achieve the above object, the utility model adopts the following technical scheme:

a percussion drill for drilling composite materials comprises a drill handle and a drill body, wherein the drill handle is connected with the drill body, a spiral chip removal groove is arranged on the drill body, a cutting edge clamping groove is arranged at the other end of the drill body, a cutting edge is embedded in the clamping groove,

the cutting edge includes cutting edge, chisel edge, back knife face and edge, two cutting edge slope staggered connection, the edge of connecting forms the chisel edge, the slope of back knife face along the cutting edge extends to the cutting edge lateral wall.

The two main cutting edges are connected in an inclined and staggered manner to form a smaller chisel edge, so that the positioning precision during drilling is improved, the axial force of a drill center is more concentrated, and the drilling is facilitated; the back knife surface extends to the side wall of the cutting edge along the edge of the main cutting edge in an inclined mode to form an inclined angle, the main cutting edge is located at the top end of the inclined angle, and therefore the cutting tool can provide larger cutting force and is more convenient to drill.

Further, the spiral chip groove includes rake face and vice cutting edge, the rake face extends to the back knife face on the cutting sword along boring body spiral.

In order to smoothly discharge chips, the chips cut by the main cutting edge fall onto the front cutter face, and the chips are smoothly discharged under the guiding action of the spiral chip discharge groove.

Furthermore, the drill body is provided with more than one spiral chip groove.

Furthermore, the vertex angle formed by the two staggered main cutting edges is 108-118 degrees.

In the technical scheme, the edge is provided with an edge inclined plane, and the inclination angle of the edge inclined plane is 3-13 degrees.

Furthermore, the chisel edge is provided with two inclined knife face extending cutting edge side walls.

Further, the drill handle and the drill body are of an integrated structure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of another embodiment of the present invention.

Fig. 3 is a partial enlarged view of the cutting edge.

Fig. 4 shows another embodiment of the cutting edge.

Fig. 5 is a partial view of a cutting edge.

The reference numbers illustrate: 1. a drill shank; 2. a drill body; 3. a spiral chip groove; 4. a rake face; 5. an edge; 6. a main blade; 7. a flank face; 8. a card slot; 9. a chisel edge, 10. an inclined knife face; 11. an edge inclined plane; 12. a cutting edge.

Detailed Description

Referring to fig. 1-5, the utility model relates to a percussion drill for drilling composite material, comprising a drill handle 1 and a drill body 2, wherein the drill handle 1 is connected with the drill body 2, the drill body 2 is provided with a spiral chip discharge groove 3, the other end of the drill body 2 is provided with a cutting edge slot 8, a cutting edge 12 is embedded in the slot 8,

the cutting edge 12 comprises main cutting edges 6, a chisel edge 9, a rear cutter face 7 and an edge 5, the two main cutting edges 6 are obliquely and alternately connected, the connecting edge forms the chisel edge 9, and the rear cutter face 7 obliquely extends to the side wall of the cutting edge 12 along the edge of the main cutting edge 6.

Referring to fig. 1, 3 and 5, in fig. 5, one end of a drill body 2 is provided with a cutting edge slot 8, a cutting edge 12 is installed in the slot 8, the cutting edge 12 is welded with the slot, a wider chisel edge 9 is adopted in a conventional cutting edge 12, and the wider chisel edge 9 is used, so that the situation of inaccurate positioning can occur, because the wider chisel edge 9 causes poor centering precision during operation, the position of a drill bit is easy to shift, and axial resistance at the drill bit is large.

In order to provide stronger cutting force during drilling, an oblique angle is formed by the flank surface 7 extending obliquely along the edge of the main cutting edge 6 to the side wall of the cutting edge 12, so that the main cutting edge 6 is positioned at the oblique angle top end, thereby providing larger cutting force and facilitating drilling.

Referring to fig. 1, spiral chip groove 3 includes rake face 4 and vice cutting edge, rake face 4 is along boring the body 2 spiral and extending to the back knife face 7 on the cutting edge 12, is using the utility model discloses when driling, produced piece drops to rake face 4 when the cutting of main cutting edge 6, along with the guide effect discharge of spiral chip groove 3, makes through such design to discharge the piece more smoothly.

Referring to fig. 2, in order to further improve the chip removing effect, the drill body 1 is provided with more than one spiral chip removing groove 3.

Referring to fig. 1, the two major cutting edges 6 are staggered to form an apex angle of 108 to 118, and specifically, the two major cutting edges 6 are staggered to form an apex angle of 113.

In the above technical solution, the edge 5 shown with reference to fig. 1 and 5 is provided with an edge inclined plane 11, an inclination angle of the edge inclined plane 11 is 3 ° to 13 °, specifically, an inclination angle of the edge inclined plane 11 is 8 °, and by providing the edge inclined plane 11 on the edge 5, the inclination direction of the edge inclined plane 11 is consistent with that of the flank 7, which aims to further improve the cutting force during drilling.

Referring to fig. 4, the chisel edge 9 is provided with two inclined knife surfaces 10 extending cutting edge 12 side walls, since the width of the chisel edge 9 can have a great influence on the positioning accuracy during drilling, in order to further improve the drilling accuracy, thereby reducing the width of the chisel edge 9, the utility model discloses in, the design of extending the cutting edge 12 side walls through the inclined knife surfaces 10 reduces the width of the chisel edge 9, thereby improving the positioning accuracy during drilling.

Referring to fig. 1, the drill shank 1 and the drill body 2 are of a one-piece construction.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims

1. The utility model provides a percussion bit for combined material punches, includes drill shank and bores the body, the drill shank is connected with the drill body, its characterized in that: the drill body is provided with a spiral chip groove, the other end of the drill body is provided with a cutting edge clamping groove, a cutting edge is embedded in the clamping groove,

the cutting edge includes cutting edge, chisel edge, back knife face and edge, two the cutting edge slope staggered connection connects the edge and forms the chisel edge, the slope of back knife face edge along the cutting edge extends to the cutting edge lateral wall.

2. A percussion drill bit for composite material drilling according to claim 1, characterised in that: the spiral chip groove comprises a front cutter face and an auxiliary cutting edge, and the front cutter face extends to a rear cutter face on the cutting cutter along the spiral of the drill body.

3. A percussion drill bit for composite material drilling according to claim 2, characterised in that: the drill body is provided with more than one spiral chip groove.

4. A percussion drill bit for composite material drilling according to claim 1, characterised in that: the two main cutting edges are staggered to form an apex angle of 108-118 degrees.

5. A percussion drill bit for composite material drilling according to claim 1, characterised in that: the edge is provided with an edge inclined plane, and the inclination angle of the edge inclined plane is 3-13 degrees.

6. A percussion drill bit for composite material drilling according to claim 1, characterised in that: the chisel edge is provided with two inclined knife face extending cutting edge side walls.

7. A percussion drill bit for composite material drilling according to claim 1, characterised in that: the drill handle and the drill body are of an integrated structure.