CN212704571U

CN212704571U - Drill bit for highlight aluminum

Info

Publication number: CN212704571U
Application number: CN202021204042.4U
Authority: CN
Inventors: 包力; 王万兴
Original assignee: Changzhou Hayu Tools Co ltd
Current assignee: Changzhou Hayu Tools Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-03-16
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a drill bit for highlight aluminium, including handle of a knife and cutter body, the two fixed connection, cutter body one end is equipped with the cutting part, the cutting part is including setting up the main cutting part on the cutter body terminal surface and extending to the vice cutting part in cutter body middle part from the terminal surface, be equipped with the main cutting edge on the main cutting part, the main cutting edge has ground the back knife face on the cutter body terminal surface, and two back knife faces form the chisel edge in core department, are equipped with the main chip groove of curved surface type indent on the cutter body terminal surface with the main cutting edge adjacent department, grind a main chip guide face between main chip groove and the chisel edge; the auxiliary cutting part comprises two first cutting parts and two second cutting parts, the two first cutting parts are rotationally symmetrical around the axis of the cutter body by 180 degrees, and the two second cutting parts are rotationally symmetrical around the axis by 180 degrees; the utility model discloses the drill bit is used for drilling aluminum alloy material, has the rotational speed height, and centering ability is strong advantage can avoid the aluminum alloy to produce in the drilling process and glue phenomenons such as sword.

Description

Drill bit for highlight aluminum

Technical Field

The utility model belongs to the machining cutter field, concretely relates to highlight drill bit for aluminium of straight flute profile.

Background

Aluminum and aluminum alloys, because of their low density and certain machinability and good electrical, thermal and corrosion resistance, are widely used in various industrial sectors, particularly in the aerospace sector, but in drilling, aluminum alloys present a number of processing difficulties.

Compared with other common processing metals, the aluminum alloy has two characteristics, namely soft material and poor rigidity, and low elastic modulus, and the two factors obviously influence the cutting processability of the aluminum alloy. When a common cutter is used for drilling and processing the aluminum alloy, when the cutter is not accurately centered or is not firmly clamped, the cutter is intermittently rubbed on the surface of a workpiece to generate extrusion phenomenon and powder cutting, and when the gap or elasticity disappears, the cutter bites into the surface of the workpiece to gnaw out groove marks; when drilling, because high-speed processing is carried out, a large amount of heat can be generated, if the generated heat cannot be taken away by cutting fluid in time, a cutter sticking phenomenon can occur, machine chip tumors can appear seriously, the processing roughness of a workpiece and the service life of a cutter can be seriously influenced, and meanwhile, the workpiece can be deformed by the heat, and the precision of the workpiece is seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the problem that current cutter exists in processing aluminium alloy material, the utility model provides a drill bit for highlight aluminium, its technical scheme as follows:

the drill bit for the high gloss aluminum comprises a cutter handle and a cutter body which are fixedly connected, wherein one end of the cutter body is provided with a cutting part, the cutting part comprises a main cutting part arranged on the end surface of the cutter body and an auxiliary cutting part extending from the end surface to the middle part of the cutter body, the main cutting part is provided with a main cutting edge, the main cutting edge is ground with a rear cutter face on the end surface of the cutter body, two rear cutter faces form a cross blade at the core part, a main chip removing groove with a curved surface type inwards concave part is arranged on the end surface of the cutter body and adjacent to the main cutting edge, and a main chip guide surface is ground between the; the auxiliary cutting part comprises two first cutting parts and two second cutting parts, the two first cutting parts are in 180-degree rotational symmetry around the axis of the cutter body, and the two second cutting parts are in 180-degree rotational symmetry around the axis.

Further, first cutting portion includes first rake face and first back knife face, forms alpha angle between first rake face and the first back knife face, is equipped with first edge between first rake face and the first back knife face, and the intersection line of first rake face and first edge is first cutting edge, the adjacent department of first rake face is equipped with first chip groove, first chip groove is straight flute, and first chip groove is crossing with main chip groove in cutter body terminal surface department.

Furthermore, the second cutting part comprises a second front cutter face and a second rear cutter face, a beta angle is formed between the second front cutter face and the second rear cutter face, a second edge is arranged between the second front cutter face and the second rear cutter face, the intersection line of the second front cutter face and the second edge is a second cutting edge, and a second chip removal groove is formed in the position adjacent to the second front cutter face.

Furthermore, two spiral cutting fluid channels are arranged from the end face of the cutter handle to the end face of the cutter body in the cutter body, two cutting fluid spraying holes are formed in the end face of the cutter body, and two cutting fluid injection holes are formed in the end face of the cutter handle.

Furthermore, the end face of the cutter body is also provided with a cutting fluid guide groove which is an irregular curved surface adjacent to the main chip groove, one end of the cutting fluid guide groove is connected with the edge of the cutting fluid spraying hole, and the other end of the cutting fluid guide groove is intersected with the first chip groove.

Furthermore, an oil grinding groove is formed in the end face of the cutter handle, and two cutting fluid injection holes are contained in the oil grinding groove.

Further, the angle α is in the range of 55 ° to 60 °, preferably 55 °.

Further, the angle β is in the range of 57 ° to 60 °, preferably 57 °.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses drill bit for highlight aluminium has adopted the design of straight flute drill, compares in general cutters such as fluted drill, and the centering ability of straight flute drill is strong, and cutting speed is high, and to aluminum alloy material, limit rotation and big feed are the cutting purpose when the aluminum alloy drills, and high rotational speed when this cutter cuts can provide great centrifugal force for the smear metal more appears spraying form in the chip groove and discharges, also can shorten the unit dwell time of smear metal on the cutting edge simultaneously, reduces the possibility of bonding. Meanwhile, high-speed cutting generates smaller cuttings, the smaller cuttings are easier to be flushed out under the flushing of cutting fluid, a large amount of cutting heat can be taken away by the cutting fluid, and the situations of cutter sticking or scrap accumulation and the like are avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the drill for high-gloss aluminum of the present invention;

FIG. 2 is a schematic structural view of the end surface of the cutter body of the present invention;

FIG. 3 is a side view of the middle tool shank of the present invention;

FIG. 4 is a schematic structural view of the end face of the middle tool shank of the present invention;

labeled as: the cutting tool body 1, the cutting part 2, the main cutting part 3, the main cutting edge 31, the flank 32, the chisel edge 33, the main chip groove 34, the main chip surface 35, the sub cutting part 4, the first cutting part 5, the first rake surface 51, the first flank surface 52, the first edge 53, the first cutting edge 54, the first chip groove 55, the second cutting part 6, the second rake surface 61, the second flank surface 62, the second edge 63, the second cutting edge 64, the second chip groove 65, the cutting fluid channel 7, the cutting fluid injection hole 71, the cutting fluid injection hole 72, the cutting fluid lead-out groove 73, the tool shank 8, and the oil grinding groove 81.

Detailed Description

The invention is further described with reference to the following figures and examples.

The high-gloss drill bit for aluminum comprises a tool shank 8 and a tool body 1 which are fixedly connected, wherein one end of the tool body 1 is provided with a cutting part 2, the cutting part 2 comprises a main cutting part 3 arranged on the end surface of the tool body and an auxiliary cutting part 4 extending from the end surface to the middle part of the tool body, the main cutting part 3 is provided with a main cutting edge 31, the main cutting edge 31 is ground with a rear tool face 32 on the end surface of the tool body, two rear tool faces 32 form a cross edge 33 at the core part, a main chip removal groove 34 with a curved surface type concave inwards is arranged on the end surface of the tool body and adjacent to the main cutting edge 31, and a main chip guide surface 35 is ground between the main chip removal; the auxiliary cutting part 4 comprises two first cutting parts 5 and two second cutting parts 6, the two first cutting parts 5 are in 180-degree rotational symmetry around the axis of the cutter body, and the two second cutting parts 6 are in 180-degree rotational symmetry around the axis.

The main cutting edges 31 symmetrically arranged are arranged on the end face of the cutter body, and are used for drilling a workpiece to be drilled at the working time, the four auxiliary cutting parts 4 respectively arranged on the cutter body are used for cutting straight blades, and the main cutting edges are used for reaming and grinding the drilled hole.

The first cutting part 5 comprises a first front cutter surface 51 and a first rear cutter surface 52, an angle alpha is formed between the first front cutter surface 51 and the first rear cutter surface 52, a first edge 53 is arranged between the first front cutter surface 51 and the first rear cutter surface 52, the intersection line of the first front cutter surface 51 and the first edge 53 is a first cutting edge 54, a first chip groove 55 is arranged at the adjacent position of the first front cutter surface 51, the first chip groove 55 is a straight groove, and the first chip groove 55 is intersected with the main chip groove 34 at the cutter body end surface; the second cutting portion 6 comprises a second front tool surface 61 and a second rear tool surface 62, a beta angle is formed between the second front tool surface 61 and the second rear tool surface 62, a second edge 63 is arranged between the second front tool surface 61 and the second rear tool surface 62, the intersection line of the second front tool surface 61 and the second edge 63 is a second cutting edge 64, and a second chip removal groove 65 is formed at the adjacent position of the second front tool surface 61.

The angle alpha is in the range of 55-60 degrees, and the preferred angle is 55 degrees; the range of the beta angle is 57-60 degrees, the preferred angle is 57 degrees, and the edge is arranged between the two front cutter faces and the rear cutter face, so that the situations of cutter breakage, easy damage and the like caused by too sharp cutting edges in the cutting process of straight cutting edges can be avoided.

Two spiral cutting fluid channels 7 are arranged from the end face of the tool shank to the end face of the tool body in the tool body, two cutting fluid spraying holes 72 are formed in the end face of the tool body, and two cutting fluid injection holes 71 are formed in the end face of the tool shank; the end face of the cutter body is also provided with a cutting fluid guide groove 73, the cutting fluid guide groove 73 is an irregular curved surface adjacent to the main chip groove 34, one end of the cutting fluid guide groove is connected with the edge of the cutting fluid spraying hole 72, and the other end of the cutting fluid guide groove is intersected with the first chip groove 55; an oil grinding groove 81 is formed in the end face of the tool shank, and two cutting fluid injection holes 71 are accommodated in the oil grinding groove 81.

In the working process of the utility model, the main cutting edge 31 on the end surface of the cutter body firstly contacts the surface of the workpiece to start drilling, the cuttings generated by drilling enter the main chip-discharging groove 34 from the main chip-discharging surface 35, the main chip-discharging groove 34 continuously discharges the cuttings into the first chip-discharging groove 55 along with the drilling depth, at the same time, the four secondary cutting edges start to operate, the cutting fluid is injected into the two cutting fluid injection holes 71 from the oil grinding groove 81, under high pressure, the cutting fluid is discharged from the cutting fluid discharge hole 72 on the end surface of the cutter body through the cutting fluid passage 7, the cutting fluid cools the edge portion in a high temperature state, a part of the cutting fluid flows into the first chip discharge groove 55 from the cutting fluid lead-out groove 73, chips drilled by the main cutting edge 31 and the first cutting edge 54 are carried out of the cutter body from the first chip discharge groove 55, and the other part of the cutting fluid flows out from the second chip discharge groove 65, cools the second cutting edge 64, and cleans the chips.

The above description is only for the preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Highlight drill bit for aluminium, its characterized in that: the cutting tool comprises a tool handle and a tool body which are fixedly connected, wherein one end of the tool body is provided with a cutting part, the cutting part comprises a main cutting part arranged on the end surface of the tool body and an auxiliary cutting part extending from the end surface to the middle part of the tool body, the main cutting part is provided with a main cutting edge, the main cutting edge is provided with a rear tool face ground on the end surface of the tool body, two rear tool faces form a cross blade at the core part, a main chip removing groove with a curved surface type concave inwards is arranged on the end surface of the tool body and adjacent to the main cutting edge, and a main chip guide surface is ground between the; the auxiliary cutting part comprises two first cutting parts and two second cutting parts, the two first cutting parts are in 180-degree rotational symmetry around the axis of the cutter body, and the two second cutting parts are in 180-degree rotational symmetry around the axis.

2. The drill for high gloss aluminum according to claim 1, wherein: the first cutting portion comprises a first front cutter face and a first rear cutter face, an alpha angle is formed between the first front cutter face and the first rear cutter face, a first edge is arranged between the first front cutter face and the first rear cutter face, the intersection line of the first front cutter face and the first edge is a first cutting edge, a first chip removal groove is formed in the position, adjacent to the first front cutter face, of the first chip removal groove, the first chip removal groove is a straight groove, and the first chip removal groove is intersected with a main chip removal groove in the position of the end face of the cutter body.

3. The drill for high gloss aluminum according to claim 1, wherein: the second cutting portion comprises a second front cutter face and a second rear cutter face, a beta angle is formed between the second front cutter face and the second rear cutter face, a second edge is arranged between the second front cutter face and the second rear cutter face, the intersection line of the second front cutter face and the second edge is a second cutting edge, and a second chip removal groove is formed in the position, adjacent to the second front cutter face, of the second cutting edge.

4. The drill for high gloss aluminum according to claim 1, wherein: two spiral cutting fluid channels are arranged from the end face of the cutter handle to the end face of the cutter body in the cutter body, two cutting fluid spraying holes are formed in the end face of the cutter body, and two cutting fluid injection holes are formed in the end face of the cutter handle.

5. The drill for high gloss aluminum according to claim 4, wherein: the end face of the cutter body is also provided with a cutting fluid guide groove which is an irregular curved surface adjacent to the main chip groove, one end of the cutting fluid guide groove is connected with the edge of the cutting fluid spraying hole, and the other end of the cutting fluid guide groove is intersected with the first chip groove.

6. The drill for high gloss aluminum according to claim 4, wherein: the end face of the tool shank is provided with an oil grinding groove, and two cutting fluid injection holes are accommodated in the oil grinding groove.

7. The drill for high gloss aluminum according to claim 2, wherein: the angle alpha is in the range of 55-60 deg..

8. The drill for high gloss aluminum according to claim 3, wherein: the beta angle is in the range of 57-60 deg..