CN208289062U

CN208289062U - A kind of core drill

Info

Publication number: CN208289062U
Application number: CN201820590611.XU
Authority: CN
Inventors: 杨素雄; 刘春梅
Original assignee: Beijing Zhong Xing Jie Technology Development Co Ltd
Current assignee: Beijing Zhong Xing Jie Technology Development Co Ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2018-12-28
Anticipated expiration: 2028-04-24

Abstract

The utility model discloses a kind of core drills, the core drill includes drill shank and bit head, one end of drill shank and the rotation axis connection of driving equipment, the other end of drill shank is connect with sleeve shaped bit head, sleeve shaped bit head outer wall is equipped with a plurality of chip space, one end of every chip space is equipped with cutter groove and enters the tooth socket in chip space for swarf, cutter groove is arranged on the side wall of the side of chip space, carbide chip for cutting workpiece is installed, the end sword for cutting workpiece of carbide chip stretches out cutter groove in cutter groove.A kind of core drill of the utility model due to being equipped with carbide cutting knife in cutting end, realize can not only high efficiency drilling, and extend the service life of core drill.

Description

A kind of core drill

Technical field

The utility model relates to cutting element technical fields, and in particular to a kind of core drill.

Background technique

Rail such as finds problematic rail in daily maintenance, then this section of rail must be cut off, rechange the preceding paragraph New rail, new rail and original rail are attached after must drilling with the cooperation of connector and bolt, nut, mesh Before, the drilling of the rail mostly uses hollow boring bit, can drill through biggish hole efficiently in order to place the bolt being relatively large in diameter, but in reality In the application of border, since rail has the characteristics that high rigidity, hollow boring bit cutting edge after drilling through a some holes can be seriously worn The problem of, lead to that drilling efficiency declines or even cutting edge fracture, tipping cause drilling function to fail, that there are service lifes is short, makes With problem at high cost.

Utility model content

The purpose of this utility model is to provide a kind of core drills, and the cutting edge to solve existing core drill is easily ground The problem of damage, tipping.

To achieve the above object, the technical solution of the utility model is a kind of core drill, and a kind of core drill includes boring Shank and bit head, one end of drill shank and the rotation axis connection of driving equipment, the other end and sleeve shaped bit head of drill shank Connection, sleeve shaped bit head outer wall be equipped with a plurality of chip space, one end of every chip space be equipped with cutter groove and for swarf into Enter the tooth socket in chip space, cutter groove is arranged on the side wall of the side of chip space, is equipped in cutter groove for cutting workpiece Carbide chip.

Preferably, the carbide chip soldering is fixed in cutter groove.

Preferably, the carbide chip being mounted in cutter groove forms the wall surface of the side of chip space.

Preferably, the length of every chip space is consistent with the length of bit head.

Preferably, the bit head is equipped with two groups of Combined hard-alloy blades, every group of carbide chip includes length Outer blade, middle blade and the inner blade successively to successively decrease is spent, the standoff distance between outer blade, middle blade and inner blade is equal.

Preferably, in two outer blades, two middle blades and two in two groups of Combined hard-alloy blades Blade is separately positioned on the both ends in the different-diameter direction of bit head.

Preferably, the wide cut of the blade tip of the outer blade, middle blade and inner blade is incremented by successively.

Preferably, the center of circle of the drill shank is equipped with through-hole.

Preferably, the wide cut of the swarf entrance of the chip space of the cutting end part of the sleeve shaped bit head to swarf exports Wide cut be gradually incremented by.

The utility model has the advantages that

One, for a kind of core drill of the utility model due to being equipped with carbide chip in cutting end, realizing can not only be high Efficiency drilling, and extend the service life of core drill.

Two, wide cut of the chip space of a kind of core drill of the utility model due to chip removal mouth wide cut greater than crumb inlet, in addition The length for increasing chip space realizes chip removal smoothly effect.

Three, a kind of cemented carbide cutting tool of core drill of the utility model is cut due to being equipped with two component layers combined types Blade, realize it is progressive cutting and the progressive increase in cutting face effect, avoid each cutter end sword bear it is excessive Resistance and generate tipping phenomenon.

Detailed description of the invention

Fig. 1 is a kind of side structure schematic view of core drill of the utility model.

Fig. 2 is a kind of positive structure diagram of the cutting end of core drill of the utility model.

Fig. 3 is a kind of side structure schematic view of the composite blade of core drill of the utility model.

Specific embodiment

The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.

Embodiment 1

As shown in Figure 1, a kind of core drill, a kind of core drill includes drill shank 1 and bit head 2, one end of drill shank 1 It is connect with the other end of the rotation axis connection of driving equipment, drill shank 1 with sleeve shaped bit head 2,2 outer wall of sleeve shaped bit head is set There is a plurality of chip space 21, one end of every chip space 21 is equipped with cutter groove 22 and enters the tooth socket in chip space 21 for swarf 23, cutter groove 22 is arranged on the side wall of the side of chip space 21, and the hard conjunction for cutting workpiece is equipped in cutter groove 22 The end sword for cutting workpiece of golden blade 24, carbide chip 24 stretches out cutter groove 22.The soldering of carbide chip 24 is solid It is scheduled in cutter groove 22, core drill chamber 25 plays a part of to accommodate workpiece.

Preferably, the carbide chip 24 being mounted in cutter groove 22 forms the wall surface of the side of chip space 21.

Preferably, the length of every chip space 21 is consistent with the length of bit head 2.

Preferably, the center of circle of the drill shank 1 is equipped with through-hole 11, and through-hole 11 is for placing spiral bit.

Preferably, wide cut to the swarf of the swarf entrance of the chip space 21 of the cutting end part of the sleeve shaped bit head 2 goes out The wide cut of mouth is gradually incremented by.

Embodiment 2

As shown in Fig. 2-Fig. 3, the present embodiment is substantially the same manner as Example 1, the difference is that: the bit head 2 is equipped with Two groups of Combined hard-alloy blades 24, every group of carbide chip 24 include end sword length successively successively decrease outer blade 241, in Blade 242 and inner blade 243, the standoff distance between outer blade 241, middle blade 242 and inner blade 243 are equal.

Preferably, two middle 242 and of blade of 241, two, outer blade in two groups of Combined hard-alloy blades 24 Two inner blades 243 are separately positioned on the both ends in the different-diameter direction of bit head 2.

Preferably, the cutting wide cut of the end sword of the outer blade 241, middle blade 242 and inner blade 243 is incremented by successively, outside Blade 241, middle blade 242 and inner blade 243 successively carry out cutting to workpiece 3 and with progressive, the outer blades of cutting depth 241, middle blade 242 and inner blade 243 are incremented by successively to the area of cut of workpiece 3.

Although above having made detailed description to the utility model with generality explanation and specific embodiment, On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art 's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to that the present invention claims guarantors The range of shield.

Claims

1. a kind of core drill, it is characterised in that: the core drill includes drill shank (1) and bit head (2), and the one of drill shank (1) The rotation axis connection at end and driving equipment, the other end of drill shank (1) are connect with sleeve shaped bit head (2), sleeve shaped bit head (2) outer wall is equipped with a plurality of chip space (21), and one end of every chip space (21) is equipped with cutter groove (22) and enters for swarf Tooth socket (23) in chip space (21), cutter groove (22) are arranged on the side wall of the side of chip space (21), in cutter groove (22) Carbide chip (24) for cutting workpiece is installed, the end sword for cutting workpiece of carbide chip (24) stretches out Cutter groove (22).

2. a kind of core drill according to claim 1, it is characterised in that: carbide chip (24) soldering is fixed on In cutter groove (22).

3. a kind of core drill according to claim 1, it is characterised in that: the hard being mounted in cutter groove (22) closes Golden blade (24) forms the wall surface of the side of chip space (21).

4. a kind of core drill according to claim 1, it is characterised in that: the length and bit head of the chip space (21) (2) length is consistent.

5. a kind of core drill according to claim 1, it is characterised in that: it is hard that the bit head (2) is equipped with two groups of combined types Matter alloy blade (24), every group of carbide chip (24) include outer blade (241), the middle blade for holding sword length successively to successively decrease (242) and inner blade (243), the standoff distance between outer blade (241), middle blade (242) and inner blade (243) are equal.

6. a kind of core drill according to claim 5, it is characterised in that: two groups of Combined hard-alloy blades (24) In two outer blades (241), two middle blades (242), two inner blades (243) be separately positioned on the differences of bit head (2) Diametric both ends.

7. a kind of core drill according to claim 5, it is characterised in that: the outer blade (241), middle blade (242) and The cutting wide cut of the end sword of inner blade (243) is incremented by successively.

8. a kind of core drill according to claim 1, it is characterised in that: the center of circle of the drill shank (1) is equipped with through-hole (11)。

9. a kind of core drill according to claim 1, it is characterised in that: the cutting end part of the sleeve shaped bit head (2) The wide cut that exports of wide cut to swarf of swarf entrance of chip space (21) be gradually incremented by.