CN213729539U

CN213729539U - Commercial car power is total to become high-efficient three-edge drill bit of hole processing

Info

Publication number: CN213729539U
Application number: CN202022074432.0U
Authority: CN
Inventors: 郭广强
Original assignee: Taicang Ruiding Precision Machinery Technology Co ltd
Current assignee: Taicang Ruiding Precision Machinery Technology Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-07-20
Anticipated expiration: 2030-09-21

Abstract

The utility model provides a high-efficient three-edge drill of commercial car power total pore-forming processing, includes blade and handle of a knife, passes through threaded connection between blade and the handle of a knife, and three at least cutting edges have been seted up to the blade, are equipped with the helicla flute between two adjacent cutting edges, and every cutting edge all includes main cutting edge and circumference sword, and main cutting edge is equipped with the chamfer with circumference sword juncture, and main cutting edge adopts the design of multistage curved surface, wherein includes behind the cutting edge knife face and chip groove, and knife face juncture forms the drill point behind the cutting edge on three cutting edges. The utility model adopts the design of three cutting edges, and the machining efficiency is improved by 1.5-2.5 times compared with that of the traditional hard alloy two-edge drill; the drill point formed by grinding the rear cutter face of the cutting edge can improve the position degree and quality of a machining hole, and has better size control capability.

Description

Commercial car power is total to become high-efficient three-edge drill bit of hole processing

Technical Field

The utility model relates to a drill bit technical field for machining, concretely relates to high-efficient three-edge drill bit of commercial car power assembly spot facing work.

Background

In the hole machining of a power assembly of a commercial vehicle, a high-speed steel double-edge drill bit and a whole hard alloy double-edge drill bit are structural forms of the traditional drill bit in the current market. The high-speed steel double-edge drill bit is made of high-speed steel materials, the high-speed steel (HSS) is tool steel with high hardness, high wear resistance and high heat resistance, the red hardness of the tool steel can reach 650 ℃, and the hardness HRC can reach 60. The hard alloy double-edged drill is made of hard alloy materials, the main components of the hard alloy are tungsten carbide and cobalt which account for 99 percent of all the components, 1 percent of the hard alloy is other metals, the red hardness of the hard alloy can reach 800-1000 ℃, and the hardness can reach more than HRC 90. Due to the characteristics of materials, the cutting efficiency of the hard alloy two-edge drill is 4-7 times that of a high-speed steel drill.

With the development of modern manufacturing industry, more and more customers have great requirements on machining efficiency, the advantages of the hard alloy two-edge drill are obvious to the high-speed steel two-edge drill, the hard alloy two-edge drill becomes the main scheme of the conventional commercial vehicle power main hole forming machining, but the machining efficiency is difficult to further improve, and due to the characteristics of the two-edge drill, the quality of a machined hole is affected when the machined surface is uneven, and the surface of the machined hole is required to be added before machining.

Therefore, to the above problem, the utility model provides a new technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model discloses combine prior art and market needs, provide a high-efficient three-edge drill bit of commercial car power assembly spot facing work, adopt carbide material, have three cutting edges, machining efficiency is 1.5-2.5 times that carbide two-edge bored, and three-edge bores have unique drill point shape, can directly process out the hole that meets the requirements on certain unevenness surface, need not to carry out surface machining, further promotes machining efficiency.

The utility model discloses a realize through following technical scheme:

the utility model provides a high-efficient three-edge drill of commercial car power total pore-forming processing, includes blade and handle of a knife, the blade is a whole with the handle of a knife, at least three cutting edges have been seted up to the blade, are equipped with the helicla flute between two adjacent cutting edges, every cutting edge all includes main cutting edge and circumference sword, main cutting edge is equipped with the chamfer with circumference sword juncture, main cutting edge adopts the design of multistage curved surface, wherein knife face and chip groove behind the cutting edge, knife face juncture forms the drill point behind the cutting edge on three cutting edges.

Further, a vertex angle b is formed between the main cutting edges, and the angle of the vertex angle b is 120-150 degrees.

Further, the cutting edge flank is of an arc relief angle structure, and the arc relief angle a is 5-15 degrees.

Furthermore, negative chamfers are distributed on the edge of the circumferential edge, a taper is arranged on the circumferential edge, and the diameter of the taper is changed into the diameter variation, and the diameter of the taper is reduced by 0.2-0.4 mm every 100 mm.

Furthermore, an inner cooling hole is arranged between the cutting edge rear cutter face on the main cutting edge and the chip groove, and the inner cooling hole penetrates through the cutter body and is of a spiral structure.

Furthermore, the tail end of the cutter handle is provided with at least three flow guide grooves, and the flow guide grooves correspond to the cooling holes in the cutter body.

The utility model has the advantages that:

1. the utility model adopts the design of three cutting edges, and the machining efficiency is improved by 1.5-2.5 times compared with that of the traditional hard alloy two-edge drill;

2. the drill point formed by polishing the rear cutter face of the cutting edge can improve the position degree and quality of a machined hole, and has better size control capability;

3. the PVD coating and the CVD coating are arranged on the surface of the cutting edge, so that the abrasion resistance and the high-temperature resistance are improved, the service life of the cutting edge is prolonged, and meanwhile, the thickness of the coating can reach 2-10 micrometers, so that the high-speed cutting of the drill bit can be ensured;

4. be provided with the dispersion internal cooling hole of helical structure design on the blade, make every cutting edge can both carry out fine cooling, guarantee cutting effect, improve life.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the blade body;

FIG. 3 is a schematic view of the main cutting edge;

FIG. 4 is a schematic view of the structure of the cutting edge flank;

FIG. 5 is a schematic view of the construction of the drill tip;

FIG. 6 is a schematic view of the structure of the tool shank.

Wherein: 100. the tool comprises a tool shank 101, a guide groove 200, a tool body 201, a spiral groove 202, a circumferential edge 203, an inner cooling hole 204, a negative chamfer 205, a chamfer 206, a cutting edge flank surface 207, a main cutting edge 208, a chip groove 209 and a drill tip.

Detailed Description

The present invention will be further described with reference to the following description of the drawings.

As shown in figures 1-6, a high-efficient three-edge drill of commercial car power total pore-forming processing, including blade 200 and handle of a knife 100, blade 200 is a whole with handle of a knife 100, at least three cutting edges have been seted up to blade 200, be equipped with helicla flute 201 between two adjacent cutting edges, every cutting edge all includes main cutting edge 207 and circumference sword 202, main cutting edge 207 is equipped with chamfer 205 with circumference sword 203 junction, main cutting edge 207 adopts the design of multistage curved surface, including cutting edge flank face 206 and chip groove 208, cutting edge flank face 206 junction formation drill point 209 on three cutting edges.

In this embodiment, the cutting edge flank 206 is ground with a radiused grinding wheel, resulting in a sharp drill point 209.

In this embodiment, the main cutting edge 207 is a multi-section curved surface structure, so that chips can be effectively broken during drilling, and iron chips are prevented from being wound on the cutter, and a vertex angle b is formed between the main cutting edges 207, and the angle of the vertex angle b is 120-150 degrees.

In the present embodiment, the cutting edge flank 206 has a circular arc relief angle structure, and the circular arc relief angle a is 5 ° to 15 °.

In the embodiment, the negative chamfers 204 are distributed on the edge of the circumferential edge 202, the negative chamfers 204 are used for enhancing the strength of the edge of the circumferential edge, the angle of the negative chamfers 204 ranges from-5 degrees to-10 degrees, the diameter size of the circumferential edge 202 controls the size of a drilled hole, the circumferential edge is provided with a taper, and the taper is converted into a diameter variation and is reduced by 0.2-0.4 mm when the diameter is reduced by every 100 mm.

In the present embodiment, an inner cooling hole 203 is provided between the cutting edge flank surface 206 and the chip flute 208 on the major cutting edge 207, and the inner cooling hole 203 penetrates the blade body 200 and has a spiral structure.

In this embodiment, at least three flow guide grooves 101 are formed at the connecting end of the tool holder 100 and the tool body 200, and the flow guide grooves 101 correspond to the cooling holes 209 on the tool body 200, so as to facilitate the cooling liquid to enter the inner cooling holes and increase the flow rate.

In this embodiment, the chamfer 205 is distributed at the boundary between the main cutting edge 207 and the circumferential edge 202, and plays a role of protecting sharp corners.

The utility model adopts the design of three cutting edges, and the machining efficiency is improved by 1.5-2.5 times compared with that of the traditional hard alloy two-edge drill; the drill point formed by polishing the rear cutter face of the cutting edge can improve the position degree and quality of a machined hole, and has better size control capability; the cutting edge surface sets up PVD coating and CVD coating, improves and resistance to wear, high temperature resistance ability, has improved its life, and the thickness of coating can reach 2~10 microns simultaneously, can guarantee to be provided with the dispersion internal cooling hole of helical structure design on the high-speed cutting blade body of drill bit, makes every cutting edge can both carry out fine cooling, guarantees cutting effect, improves life.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a commercial car power total pore-forming processing high-efficient three-edge drill bit, includes blade and handle of a knife, through threaded connection, its characterized in that between blade and the handle of a knife: at least three cutting edges have been seted up to the blade, are equipped with the helicla flute between two adjacent cutting edges, every cutting edge all includes main cutting edge and circumference sword, main cutting edge is equipped with the chamfer with circumference sword juncture, main cutting edge adopts the design of multistage curved surface, wherein includes cutting edge back knife face and chip groove, and cutting edge back knife face juncture on three cutting edges forms the drill point.

2. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: a vertex angle b is formed between the main cutting edges, and the angle of the vertex angle b is 120-150 degrees.

3. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: the back tool surface of the cutting edge is of an arc back angle structure, and the angle a of the arc back angle is 5-15 degrees.

4. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: the edge distribution of circumference sword has negative chamfer, be equipped with the tapering on the circumference sword, the tapering converts the diameter variation volume into and reduces 0.2~0.4mm at every 100mm diameter.

5. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: an inner cooling hole is arranged between the cutting edge rear cutter face on the main cutting edge and the chip pocket, and the inner cooling hole penetrates through the cutter body and is of a spiral structure.

6. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: the tail end of the cutter handle is provided with at least three flow guide grooves, and the flow guide grooves correspond to the cooling holes in the cutter body.

7. The commercial vehicle power assembly hole machining efficient three-edge drill bit as claimed in claim 1, characterized in that: the cutting edge surface is provided with a PVD coating and a CVD coating.