CN201371265Y

CN201371265Y - Centering countersink drill bit

Info

Publication number: CN201371265Y
Application number: CN200920105497U
Authority: CN
Inventors: 赵顺权
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-13
Filing date: 2009-02-13
Publication date: 2009-12-30
Anticipated expiration: 2019-02-13

Abstract

The utility model discloses a centering countersink drill bit, which comprises a cutting shaft and a clamp holder arranged at one end of the cutting shaft, the other end of the cutting shaft is connected with a positioning shaft, and the end surface which is connected with the positioning shaft is a plane. The cutting shaft comprises a front angle knife edge, a back angle and a junk slot, the front angle knife edge is higher than the back angle, and the positioning shaft is a twist drill bit. The use of the centering countersink drill bit for processing can save working time, the precision of the drilling hole of a processed piece is high, and a processed work piece can lead an inner hexagon screw to achieve the high-quality fastening role.

Description

The centering counter bore bit

Technical field

The utility model relates to a kind of drill bit, is specifically related to a kind of centering counter bore bit.

Background technology

Counter bore bit on the existing market referring to Fig. 1, mainly is to use the spiral bit perforate, and its structure has clamp holder 1 and drill bit 2 two parts to constitute, and the front end of drill bit sees it is the triangularity structure from the side.This structures shape does not reach the standard that screw is installed with the counter sink shape of spiral bit processing work, and it is loosening to make the fastening product that comes out occur screw easily, makes the securing member can not be fastening for a long time.Use spiral bit, after the secondary perforate, the structure of workpiece as shown in Figure 2, referring to Fig. 3, install screw 3 fastening after, the contact-making surface of blind nut 3.1 bottoms and workpiece 4 is very little, hexagon socket head cap screw can not flatten, stabilization is not firm.And this product do not have locating shaft, and secondary operations makes the heart position, hole of the Kong Xinyu secondary operations of time processing be offset to some extent easily.Under the situation that workpiece is had relatively high expectations, after the secondary perforate, need be placed on the processing for the third time again of milling machine or lathe, cause manufacturing cost to increase like this, operation is loaded down with trivial details.

Summary of the invention

The utility model provides a kind of processing time saving working hour in order to solve the deficiencies in the prior art, workpiece drilling accuracy height, and can make interior hexagonal reach the centering counter bore bit of good fastening effect.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of centering counter bore bit, and comprise the cutting axle and be arranged on the clamp holder that cuts axle one end, the other end of described cutting axle links to each other with locating shaft, and its end face that links to each other with locating shaft is the plane.

Described cutting axle comprises anterior angle blade, relief angle and chip area, and described anterior angle blade is higher than relief angle.

Described locating shaft is a spiral bit.

Compared with prior art, the utility model is revised with this product centering counter bore bit the counter sink that the use spiral bit comes out, this replacement of products is convenient, change drill bit load onto centering counter bore bit directly counterbore is revised, be shaped in the drilling machine time processing, need not be moved to workpiece on milling machine or other lathe and process, save man-hour; Because the front end end face of cutting axle is the plane, the workpiece that processes can make hexagon socket head cap screw reach the fastening effect of high-quality; Be provided with locating shaft, guaranteed workpiece drilling accuracy and size.

Description of drawings

Fig. 1 is the structural representation of prior art spiral bit;

Fig. 2 for prior art with spiral bit secondary opening after, the structural representation of workpiece;

Fig. 3 is the structural representation after the workpiece among Fig. 2 is installed screw;

Fig. 4 is the structural representation of the utility model centering counter bore bit;

Fig. 5 is with behind the utility model centering counter bore bit secondary opening, the structural representation of workpiece;

Fig. 6 is the structural representation after the workpiece among Fig. 5 is installed screw.

Among the figure: 1 clamp holder, 2 drill bits, 3 screws, 3.1 blind nuts; 4 workpiece; 5 cutting axles, 5,5.1 anterior angle blades, 5.2 relief angles, 5.3 chip areas, 6 locating shafts.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing, but not as to qualification of the present utility model.

Referring to Fig. 4, a kind of centering counter bore bit, an end of cutting axle 5 is provided with clamp holder 1, and the other end of cutting axle 5 links to each other with locating shaft 6, and cutting axle 5 end faces that link to each other with locating shaft 6 are the plane.Cutting axle 5 comprises anterior angle blade 5.1, relief angle 5.2 and chip area 5.3, and anterior angle blade 5.1 is higher than relief angle 5.2.Anterior angle blade 5.1 plays the cutting workpiece effect, after workpiece 4 is by 5.1 cuttings of anterior angle blade, through relief angle 5.2 and chip area 5.3, foreign material is discharged.As shown in Figure 5, behind the utility model secondary opening, the heavy angle of workpiece 4 is the straight angle, and behind the installation screw 3, as shown in Figure 6, blind nut 3.1 and countersunk head can be good at butt joint, and promptly the contact-making surface of blind nut 3.1 bottoms and workpiece 4 is very firm.

Operation principle step of the present utility model:

The first step: use spiral bit earlier, to the workpiece time processing;

Second step: change spiral bit and load onto the centering counter bore bit, to the workpiece secondary operations; Centering counter bore bit front end has locating shaft, and the thickness of locating shaft is identical with the spiral bit thickness that time processing is used, and is difficult for making the skew of heart position, hole.

Above step is with the utility model the counter sink that uses spiral bit processing to be revised, and need once be shaped to workpiece at drilling machine, need not move on to workpiece on milling machine or other lathe and process, and saves man-hour.And guaranteed that workpiece drilling accuracy and size, the workpiece that processes can also make hexagon socket head cap screw reach the fastening effect of high-quality.

Above-mentioned locating shaft can also select to use spiral bit, only need carry out time processing to workpiece and get final product.

Above-described embodiment, the utility model specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.

Claims

1, a kind of centering counter bore bit comprises the cutting axle and is arranged on the clamp holder that cuts axle one end that it is characterized in that, the other end of described cutting axle links to each other with locating shaft, and its end face that links to each other with locating shaft is the plane.

2, centering counter bore bit according to claim 1 is characterized in that, described cutting axle comprises anterior angle blade, relief angle and chip area, and described anterior angle blade is higher than relief angle.

3, centering counter bore bit according to claim 1 and 2 is characterized in that, described locating shaft is a spiral bit.