CN213672028U

CN213672028U - 55 tungsten steel positioning center drill

Info

Publication number: CN213672028U
Application number: CN202022563496.7U
Authority: CN
Inventors: 殷抱锋
Original assignee: Changzhou Puxi Precision Tools Co ltd
Current assignee: Changzhou Puxi Precision Tools Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-07-13
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses a 55 tungsten steel location center bores, including drilling rod, R angle, screw thread, connecting rod, drill bit, locating hole, through-hole, fixed pin, drill point, chip groove, chamfer, cutting edge and connection angle. Compared with the prior art, the utility model discloses possess following beneficial effect: this 55 tungsten steel location center bores, through setting up the chip groove, it is interior concave arc through setting up reaming portion to the external diameter and increase progressively and its generating line, make its external diameter increase progressively rate when reaming portion external diameter is big more, it avoids reaming portion to receive great cutting dynamics when the external diameter is less, and increase the area of contact with the centre bore inner wall, reduce the cutting force that drill bit unit length cutting blade received, improve its cutting ability, through setting up R angle and locating hole, make the location ability that the center bored obtain strengthening, hoisting device's drilling and cutting ability.

Description

55 tungsten steel positioning center drill

Technical Field

The utility model relates to a cutter device specifically is a 55 tungsten steel location center bores.

Background

The center drill is mainly used for processing end faces at two ends of a shaft workpiece, the existing center drill mostly adopts a conical, cylindrical and conical structure and assists in drilling the end face of the workpiece by a chip removal groove, a cutting blade is formed between a plane wall of the chip removal groove and the outer peripheral surface of a drill to cut the inner wall of a hole, the cutting blade is mainly formed between two conical parts and the chip removal groove to cut, the stress length of the center drill is longer than that of the center drill, the abrasion of the cutting blade is large, and the service life of the drill is easy to shorten.

Therefore, the 55-degree tungsten steel positioning center drill is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a 55 tungsten steel location center bores in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose: the utility model provides a 55 tungsten steel positioning center bores, includes the drilling rod, the left side of drilling rod is provided with the connecting rod, the end of connecting rod is provided with the R angle, the front end at R angle is provided with the screw thread, be provided with the locating hole on the rear end face at R angle, the right-hand member of connecting rod is provided with the through-hole, the inside of through-hole is provided with the fixed pin, the rightmost of fixed pin is provided with the drill point, the fixed pin is connected the drill bit, the outside of drill bit is provided with the chip groove, the drill bit is connected and the chamfer, the edge of chamfer is provided with the cutting edge, the end of.

Preferably, a chip groove is formed in the middle of each of the two cutting edges, and the chip groove is of an arc-shaped structure.

Preferably, the notch of the chip groove gradually increases along the length direction of the chip groove, and the depth of the chip groove gradually increases along the length direction of the chip groove.

Preferably, the tail end of the connecting rod is provided with a positioning hole, and an R angle is arranged on the positioning hole.

Preferably, the drill is fixed on the connecting rod by connecting the fixing pin and the through hole.

Preferably, the chamfer is provided at an upper portion of the drill bit, the chamfer being provided at 90 °.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this 55 tungsten steel location center bores through setting up the chip groove, and through setting up reaming portion to the external diameter and increase progressively and its generating line is indent arc for its speed that the external diameter of reaming portion increases progressively when big more, it avoids reaming portion to receive great cutting force when the external diameter is less, increases the area of contact with the centre bore inner wall moreover, reduces the cutting force that drill bit unit length cutting blade received, improves its cutting ability.

2. This 55 tungsten steel location center bores for the location ability of center bore is strengthened, hoisting device's drilling and cutting ability through setting up R angle and locating hole.

Drawings

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

fig. 2 is a schematic structural view of the fixing pin of the present invention;

FIG. 3 is a schematic structural view of the positioning hole of the present invention;

in the figure: 1. a drill stem; 2. an R angle; 3. a thread; 4. a connecting rod; 5. a drill bit; 6. positioning holes; 7. a through hole; 8. a fixing pin; 9. drilling a tip; 10. a chip groove; 11. chamfering; 12. cutting edges; 13. and (4) connecting the corners.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a 55-degree tungsten steel positioning center drill includes a drill rod 1, a connecting rod 4 is disposed on the left side of the drill rod 1, chip flutes 10 are disposed between two cutting edges 12, each chip flute 11 is of an arc-shaped structure, an R-angle 2 is disposed at the end of the connecting rod 4, the notches of the chip flutes 10 are gradually increased along the length direction, the depth of each chip flute 10 is gradually increased along the length direction, a thread 3 is disposed at the front end of each R-angle 2, a positioning hole 6 is disposed on the rear end face of each R-angle 2, a through hole 7 is disposed at the right end of the connecting rod 4, a positioning hole 6 is disposed at the end of the connecting rod 4, the R-angle 2 is disposed on the positioning hole 6, a fixing pin 8 is disposed inside the through hole 7, a drill tip 9 is disposed at the rightmost edge of the fixing pin 8, and, drill bit 5 is connected with through-hole 7 through fixed pin 8 and fixes it on connecting rod 4, the outside of drill bit 5 is provided with chip groove 10, drill bit 5 is connected and chamfer 11, chamfer 11 sets up the top department at drill bit 5, chamfer 11 sets up to 90, the edge of chamfer 11 is provided with cutting edge 12, the end of chamfer 11 is provided with connection angle 13.

The working principle is as follows: when the 55-degree tungsten steel positioning center drill is used, firstly, the connecting rod 4 and the drill bit 5 are connected together through the through hole 7 and the fixing pin 8, secondly, the threads 3 and the R angle 2 of the connecting rod 4 are fixed, and finally, the 55-degree tungsten steel positioning center drill can be normally used by utilizing the drill bit to work.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a 55 tungsten steel location center bores, includes drilling rod (1), its characterized in that: the left side of drilling rod (1) is provided with connecting rod (4), the end of connecting rod (4) is provided with R angle (2), the front end at R angle (2) is provided with screw thread (3), be provided with locating hole (6) on the rear end face at R angle (2), the right-hand member of connecting rod (4) is provided with through-hole (7), the inside of through-hole (7) is provided with fixed pin (8), the rightmost of fixed pin (8) is provided with drill point (9), drill bit (5) are connected in fixed pin (8), the outside of drill bit (5) is provided with chip groove (10), drill bit (5) are connected and chamfer (11), the edge of chamfer (11) is provided with cutting edge (12), the end of chamfer (11) is provided with connection angle (13).

2. A 55 ° tungsten steel positioning core drill according to claim 1, wherein: a chip groove (10) is arranged between the two cutting edges (12), and the chip groove (10) is of an arc structure.

3. A 55 ° tungsten steel positioning core drill according to claim 1, wherein: the notch of the chip groove (10) is gradually increased along the length direction of the chip groove, and the depth of the chip groove (10) is gradually increased along the length direction of the chip groove.

4. A 55 ° tungsten steel positioning core drill according to claim 1, wherein: the tail end of the connecting rod (4) is provided with a positioning hole (6), and an R angle (2) is arranged on the positioning hole (6).

5. A 55 ° tungsten steel positioning core drill according to claim 1, wherein: the drill bit (5) is connected with the through hole (7) through a fixing pin (8) and is fixed on the connecting rod (4).

6. A 55 ° tungsten steel positioning core drill according to claim 1, wherein: the chamfer (11) is arranged at the upper side of the drill bit (5), and the chamfer (11) is arranged at 90 degrees.