CN204053029U

CN204053029U - A kind of drill bit

Info

Publication number: CN204053029U
Application number: CN201420516139.7U
Authority: CN
Inventors: 郑有写; 郑勇; 欧定见
Original assignee: NINGBO WELLYS INSTRUMENT Co Ltd
Current assignee: NINGBO WELLYS INSTRUMENT Co Ltd
Priority date: 2014-09-09
Filing date: 2014-09-09
Publication date: 2014-12-31
Anticipated expiration: 2024-09-09

Abstract

The utility model discloses a kind of drill bit and comprise clamping part (1) and body (2), the front end of body is apex point (3), it is characterized in that: apex point (3) both sides are provided with main cutting edge (31), body (2) is semicylinder shape, and periphery and the upper side junction of body are provided with front cutting edge.The utility model drill bit is in small size pores processing, and stock-removing efficiency is high, and long service life, drill bit intensity is good, and the precision of cutting is also high.

Description

A kind of drill bit

Technical field

The utility model relates to field of machining, is specifically related to a kind ofly process the less drill bit in aperture.

Background technology

Field of machining, large aperture, small-bore are undefined, and the processing aperture of most drill bits is all greater than 2mm, and what generally aperture is less than 5mm calls small-bore.The working portion of drill bit is exactly the part producing and process chip, comprise blade, chip is broken broken or the structure, the chip removal that wind up or hold the storage structural element such as the space of chip, the passage of cutting fluid, therefore there is larger difference with processing large aperture in machining small footpath, normal drill bit is when machining small footpath, cut disconnected broken, chip space and cutting fluid channel has all become problem, chip easily blocks chip space, working (machining) efficiency declines, drill bit also cannot cool and loss is aggravated simultaneously, and less the problems referred to above in aperture of processing are larger; Particularly when aperture is less than 2mm, and when hole depth is greater than 3 with aperture ratio, often process less than 10 holes, one will scrap common drill bit, and the life-span is extremely short, and drill bit intensity has also become the precision in problems affect hole simultaneously; Processing aperture is 1mm, and hole depth is when being the aperture of 6mm, higher to the requirement of drill bit, the fluted drill of employing in the past, a drill bit just can be scrapped in 3 holes, because hole is little dark again, more difficultly get rid of waste cut materials outward, drill bit needs the particulate of continuous grinding chip Cheng Geng little, and then gets rid of from the gap of spiral bit, such that drill bit processing temperature is high, inefficiency and easily damaging.

At present, it is low to there is working (machining) efficiency in the drill bit that machining small footpath is particularly less than 2mm aperture, the problem that the life-span is short and machining accuracy is poor.

Utility model content

The utility model is low for above-mentioned working (machining) efficiency, the problem that the life-span is short, provides a kind of efficiency high and the drill bit of life-span length.

A kind of drill bit, comprise clamping part and body, the front end of body is apex point, and apex point is overlooked as arc, and apex point (3) outward flange is provided with main cutting edge, and body is semicylinder shape.Body upper side is plane, body downside is periphery, when body rotates around drill bit axle center, the track that this body diameter rotates is cylindrical shape, and body is semi-cylindrical, namely a half space always cavity in cylindrical shape track, can as passage, cut the passage that can be formed from cavity and get rid of, can not blocking channel, thermal diffusivity, can not reduce the processing intensity of drill bit.Simultaneously apex point is provided with main cutting edge, and is all provided with main cutting edge in both sides, and drill bit rotating can cutting workpiece, improves stock-removing efficiency.

The utility model drill bit, apex point downside is not higher than body periphery.The shape of apex point is flat, and apex point downside is not more than the rotational trajectory of body periphery around the track of drill bit axis rotation, and apex point downside, to cutting not interference, is conducive to cutting edge processing work.

The utility model drill bit, apex point upper side is high near body one end and away from the low clinoplain in body one end, apex point downside is fair with body periphery.Apex point downside and body periphery maintain an equal level, apex point upper side is inclined side, apex point main cutting edge cuts lossy when needing to repair, and on the grinding tool directly apex point being placed on rotation, plane is polished, and namely forms apex point and main cutting edge after the upper side of body front end is ground with clinoplain; Apex point downside is identical with the track that this body diameter rotates around the track of track axis rotation simultaneously, is isometrical cylindrical shape, and the aperture of the workpiece of apex point processing meets body and passes through, and time processing is shaping.

The utility model drill bit, periphery and the upper side junction of body are provided with front cutting edge.Front cutting edge is used as supplementing of main cutting edge, realizes processing object when apex point main cutting edge cutting power declines.

The utility model drill bit, the periphery of body has one deck clad.The material that drill body can choose rigidity strong is made, and clad can be boron nitride, diamond also can pottery etc. material, the character according to workpiece chooses clad.The clad structure of drill bit is apex point and cutting edge place of body place, different clads forms cutting edge and is conducive to processing different workpiece.

Compared with prior art, the utility model bit cutting efficiency is high, and long service life, drill bit intensity is good, and the precision of cutting is also high.

Accompanying drawing explanation

Fig. 1 is the front view of the utility model preferred embodiment enlarged drawing;

Fig. 2 is the top view of the utility model preferred embodiment enlarged drawing;

Fig. 3 is the left view of Fig. 1;

Fig. 4 be the another preferred embodiment enlarged drawing of the utility model top view.

Detailed description of the invention

All features disclosed in this description, except mutually exclusive feature, all can combine by any way.

Arbitrary feature disclosed in this description, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.

Be preferred embodiment drill bit as shown in Figure 1, Figure 2 and Figure 3, comprise clamping part 1 and body 2, the front end of body 2 is apex point 3, and apex point 3 both sides are provided with main cutting edge 31, and body 2 is semicylinder shape; Periphery and the upper side junction of body 2 are provided with front cutting edge 21; Apex point 3 upper side is the plane tilted, and the lower surface of apex point 3 and the lower surface of body maintain an equal level, and are also periphery, and the angle polishing that apex point 3 can tilt certain from upper side by body 2 forms, and the angle suggestion of apex point 3 upper surface and lower surface is no more than 45 degree and is advisable.

Be another preferred embodiment drill bit shown in Fig. 4, the periphery of body 2 has a clad 4, clad 4 can be boron nitride, diamond also can pottery etc. material, the character according to workpiece chooses clad.But though the little drill bit of the knife edge part of drill bit plays the position of cutting function, the product of the blade efficiency of cutting of verifying has material impact, by strengthening knife edge part but not whole drill bit be conducive to reducing costs, there is higher cost performance.Drill body can choose the material of good rigidly, reduces the deformation adding man-hour, improves machining accuracy.

The major part of the utility model body 2 all can be polished into apex point 3 and use, and the utilization rate of drill bit is high, and service life also extends greatly, and economic benefit is little.

The utility model drill bit processing diameter is when being less than the small size pores of 2mm, stock-removing efficiency and precision high, and long service life, drill bit intensity is good.

The utility model does not limit to and aforesaid detailed description of the invention.The utility model expands to any new feature of disclosing in the utility model description or any combination newly.

Claims

1. a drill bit, comprises clamping part (1) and body (2), and the front end of body is apex point (3), it is characterized in that: apex point (3) is overlooked as arc, and apex point (3) outward flange is provided with main cutting edge (31), and body (2) is semicylinder shape.

2. a kind of drill bit according to claim 1, is characterized in that: the downside of apex point (3) is not higher than the periphery of body (2).

3. a kind of drill bit according to claim 1, is characterized in that: apex point (3) upper side is high near body (2) one end and away from the low clinoplain in body (2) one end, apex point (3) downside is fair with body (2) periphery.

4. a kind of drill bit according to claim 1 or 2 or 3, is characterized in that: the periphery of body (2) and upper side junction are provided with front cutting edge (21).

5. a kind of drill bit according to claim 4, is characterized in that: the periphery of body (2) has one deck clad (4).