CN212094508U

CN212094508U - Chip breaking grinding milling drill for drill tip

Info

Publication number: CN212094508U
Application number: CN202020107090.5U
Authority: CN
Inventors: 朱小坤; 何建国
Original assignee: Jiangsu Tiangong Precision Tools Co ltd
Current assignee: Jiangsu Tiangong Precision Tools Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-12-08
Anticipated expiration: 2030-01-17

Abstract

The utility model provides a drill point chip breaking abrasive milling bores, includes the cutter body of drillstock and twist form, the top of cutter body is the drill point, be provided with two main cutting edge and two symmetrical back knife faces on the drill point, the outer wall of cutter body is equipped with spiral helicine heliciform helicla flute and back of the blade, the drill point is around being equipped with an at least chip groove on the back knife face, two back furrow edges of drill point simultaneously along the chisel edge direction and with the heel arris at cutter body top coping processing forms the face of repairing simultaneously, its simple structure, and reasonable in design through after chisel edge and chip groove, can increase the feed, raises the efficiency, and the chip removal is good.

Description

Chip breaking grinding milling drill for drill tip

Technical Field

The utility model belongs to the technical field of the instrument, specific saying so relates to a twist drill, especially a drill point chip breaking milling bores.

Background

The ordinary fluted twist drill of tradition, since its birth for a century, structural shape changes little, and along with the continuous development of science and technology, the new material constantly emerges, constantly provides new requirement to the drill bit, and the ordinary fluted twist drill of tradition mainly has following problem: the numerical variation of the rake angle of each point on the main edge is large, the position close to the drill core is a negative rake angle, and the cutting condition is poor. Secondly, the chisel edge is too long, has a large deviation angle of =90 degrees and is a large negative rake angle, and the cutting condition is worse, so the axial resistance is large and the centering is not good. And thirdly, the main edge is long, the cutting chips are wide, the outflow speed of the cutting chips at each point is greatly different, the cutting chips are curled into wide spiral coils, the occupied space is large in volume, the chip removal is not smooth, and the cutting fluid is difficult to flow in.

Accordingly, the above-mentioned problems are problems that should be considered and solved in designing and using the twist drill structure.

SUMMERY OF THE UTILITY MODEL

To the problem that exists, the utility model provides an overcome the defect among the prior art, provide a drill point chip breaking milling bores rational in infrastructure.

The technical solution of the utility model is that: the utility model provides a drill point chip breaking abrasive milling bores, includes the cutter body of drillstock and twist form, the top of cutter body is the drill point, be provided with two main cutting edge and two symmetrical back knife face on the drill point, the outer wall of cutter body is equipped with spiral helicine heliciform helicla flute and back of a blade, the inside a plurality of strengthening ribs that are equipped with of helicla flute, the drill point is around being equipped with an at least chip groove on the back knife face, two back furrow arriss of drill point simultaneously along the chisel edge direction and with the back arris at cutter body top are coping processing simultaneously and are formed the face of repaieing.

The utility model discloses a further improvement lies in: a first cutting edge and a second cutting edge are arranged on the back of the cutter body.

The utility model discloses a further improvement lies in: the first blade zone is arranged along the guide blade, and the second blade zone is arranged on the edge line of the back ridge of the groove of the blade back.

The utility model discloses a further improvement lies in: the surface of the cutter body is coated with a titanium aluminum nitride coating.

The utility model discloses a further improvement lies in: the drill handle is a straight handle, a taper handle or an equal handle.

The utility model discloses a further improvement lies in: the drill handle is evenly provided with a plurality of positioning holes along the periphery.

The utility model discloses a further improvement lies in: the diameter range of the straight shank is 4.0-20.0mm, the diameter range of the taper shank is 6.0-50.0 mm, and the diameter range of the equal shank is 13.0-32.0 mm.

The utility model has the advantages that: the chip splitting drill has a simple structure and a reasonable design, can increase the feeding amount and has good chip removal after the chisel edge and the chip splitting groove are polished, has a better effect in drilling steel materials, forms narrow and thick strip-shaped chips, is favorable for chip removal, can reduce the cutting torque, ensures better chip removal of the drill by the chip splitting groove, can effectively solve the problems of long main edge, wide chip, large difference of the outflow speed of the chips at each point, curling of the chips into wide spiral coils, large occupied space volume, unsmooth chip removal and difficult inflow of cutting fluid of a common twist drill, can perform high-speed drilling and stable drilling by the drill, improves the cutting condition, increases the structural strength of a cutting part at the edge part and increases the integral rigidity of the drill; the titanium aluminum nitride coating is coated on the surface of the cutter body, so that the wear resistance and the oxidation resistance of the cutter body are improved, the friction coefficient is reduced, and the adhesion is prevented.

Drawings

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

FIG. 2 is a front view of the drill tip of the present invention;

wherein: the method comprises the following steps of 1-a drill handle, 2-a cutter body, 3-a drill tip, 4-a main cutting edge, 5-a rear cutter face, 6-a spiral groove, 7-a blade back, 8-a positioning hole, 9-a chip dividing groove, 10-a grinding face, 11-a first blade zone and 12-a second blade zone.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.

As shown in the figure, this embodiment provides a drill point chip breaking milling drill, including the cutter body 2 of drill handle 1 and twist form, drill handle 1 is straight shank, the top of cutter body 2 is drill point 3, be provided with two main cutting edge 4 and two symmetrical back knife face 5 on the drill point 3, the outer wall of cutter body 2 is equipped with spiral helicine groove 6 and back of the blade 7, drill handle 1 evenly is equipped with a plurality of locating holes 8 along the periphery, drill point 3 is around being equipped with two chip separation grooves 9 on the back knife face 5, two back flute arriss of drill point 3 simultaneously along the chisel edge direction and with the tail root arris coping simultaneously at cutter body 2 top forms coping face 10, cutter body 1 surface coating has titanium aluminium nitride coating.

The knife body 2 is characterized in that a first blade zone 11 and a second blade zone 12 are arranged on the blade back 7 of the knife body 2, the first blade zone 11 is arranged along the guide blade, and the second blade zone 12 is arranged on the edge line of the groove back edge of the blade back 7.

The beneficial effect of this embodiment is: the chip dividing drill bit has the advantages that the structure is simple, the design is reasonable, the feeding amount can be increased after the chisel edge and the chip dividing groove are polished, the chip removing is good, the chip dividing drill bit plays a good role in drilling steel materials, narrow and thick strip-shaped chips are formed, the chip removing is facilitated, the cutting torque can be reduced, the better chip removing of the drill bit is ensured by arranging the chip dividing groove, and the problems that the main edge is long, the chips are wide, the outflow speed of the chips at each point is greatly different, the chips are curled into wide spiral coils, the occupied space is large in size, the chips are not smoothly removed, and the cutting fluid is difficult to flow in can be effectively solved; the reinforcing rib is arranged in the spiral groove, so that the toughness of the drill bit is enhanced, the chips firstly contact one end of the reinforcing rib, the end is flat, the shunting effect is good, and the chips are converged after passing through the reinforcing rib, so that the chips can be more smoothly discharged; the double-edged land is arranged, so that the drill can perform high-speed drilling, the drilling is stable, the cutting condition is improved, the structural strength of the cutting part of the edge part is increased, and the integral rigidity of the drill is increased; the titanium aluminum nitride coating is coated on the surface of the cutter body, so that the wear resistance and the oxidation resistance of the cutter body are improved, the friction coefficient is reduced, and the adhesion is prevented.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a drill point chip breaking abrasive milling bores, includes the cutter body of drillstock and twist form, its characterized in that: the top end of the cutter body is a drill point, two main cutting edges and two symmetrical rear cutter faces are arranged on the drill point, a spiral groove and a blade back are formed in the outer wall of the cutter body, at least one chip separation groove is formed in the rear cutter face of the drill point in an encircling mode, and the two rear groove edges of the drill point are simultaneously ground and machined along the direction of a cross blade and the tail root edge of the top of the cutter body to form a grinding surface.

2. A drill tip chip breaking milling drill as claimed in claim 1, wherein: a first cutting edge and a second cutting edge are arranged on the back of the cutter body.

3. A drill tip chip breaking milling drill as claimed in claim 2, wherein: the first blade zone is arranged along the guide blade, and the second blade zone is arranged on the edge line of the back ridge of the groove of the blade back.

4. A drill tip chip breaking milling drill as claimed in claim 1, wherein: the surface of the cutter body is coated with a titanium aluminum nitride coating.

5. A drill tip chip breaking milling drill as claimed in claim 1, wherein: the drill handle is a straight handle, a taper handle or an equal handle.

6. A drill tip chip breaking milling drill as claimed in claim 1, wherein: the drill handle is evenly provided with a plurality of positioning holes along the periphery.

7. The drill tip chip breaking milling drill according to claim 5, wherein: the diameter range of the straight shank is 4.0-20.0mm, the diameter range of the taper shank is 6.0-50.0 mm, and the diameter range of the equal shank is 13.0-32.0 mm.