CN101549411A

CN101549411A - Cobalt high speed steel bit for machining titanium alloy

Info

Publication number: CN101549411A
Application number: CNA2009100115362A
Authority: CN
Inventors: 唐臣升
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2009-05-14
Filing date: 2009-05-14
Publication date: 2009-10-07

Abstract

A cobalt high speed steel bit for machining titanium alloy relates to cutting edge angle improvement of cobalt high speed steel bit for drilling holes on titanium alloy material. The cobalt high speed steel bit for machining titanium alloy is characterized by machining a point angle to 60 degrees and machining a clearance angle to 20 degrees, and has the advantages of enhancing the cutting performance of the cobalt high speed steel bit for machining titanium alloy and correspondingly raising the machining efficiency as each bit of the prior art equally costs more than 20 seconds to drill one hole and can just drill tens of holes at most and now drilling one hole just costs 4 to 5 seconds and more than 100 holes can be drilled at most by reducing the point angle to 60 degrees and enlarging the clearance angle to 20 degrees.

Description

Cobalt high speed steel bit for machining titanium alloy

Technical field:

The invention is the improvement of cobalt high speed steel bit cutting edge profile that drilling on titanium alloy material is used.

Background technology:

Plurality of advantages such as titanium alloy has ratio of strength to weight height, and high-temperature behavior is good, and is corrosion-resistant, thereby, be used in more and more widely in the Aero-Space manufacturing industry.But titanium alloy is two to be a kind of very difficult to machine materials, and its main cause is because poor thermal conductivity, elastic modelling quantity is little, and therefore, the cutting ability of material is poor, wearing and tearing to cutter are bigger, and especially the bounce-back of surface to be machined material is bigger, make that the cutter wear of the tool flank is very fast.And existing cobalt high speed steel bit for machining titanium alloy is bigger owing to drill point angle in the main structure parameters, it is 118 °, relief angle is less, be 12 °, one of existing machining titanium alloy high-speed steel drill can only be processed several holes, and, the Tool in Cutting feed speed is very low, caused existing cobalt high speed steel bit for machining titanium alloy cutting ability poor, working (machining) efficiency is low, the processing effect that bit life is short.Therefore, be difficult to the processing request of the high-quality and efficient drilling of pool foot titanium alloy component.

Summary of the invention:

The purpose of the invention provides a kind of cobalt high speed steel bit for machining titanium alloy that improves cutting ability, improves working (machining) efficiency; The purpose of the invention is to realize by following technical scheme: cobalt high speed steel bit for machining titanium alloy, comprise drill bit blade and drill handle part, and it is characterized in that drill bit blade drill point angle makes 60 °, relief angle is made 20 °.

The advantage of the invention:, now make 60 ° because drill point angle is reduced; Relief angle is strengthened, now make 20 °; Thereby improved the cutting ability of cobalt high speed steel bit for machining titanium alloy, improved working (machining) efficiency accordingly, originally hole of every bit drills on average needs more than 20 second, can only bore tens holes at most, only need 4～5 seconds and bore a hole now, can bore more than 100 hole at most.

Description of drawings:

Fig. 1 is the cobalt high speed steel bit for machining titanium alloy structural representation;

Fig. 2 is the drill bit partial structurtes schematic diagram of Fig. 1.

Among the figure: 1, wedge angle 2, bit edge army 3, drill handle part 4, relief angle

The specific embodiment:

Cobalt high speed steel bit for machining titanium alloy comprises drill bit blade and drill handle part, it is characterized in that drill bit blade drill point angle makes 60 °, and relief angle is made 20 °.

Advantage:, now make 60 ° because drill point angle is reduced; Relief angle is strengthened, now make 20 °; Thereby improved the cutting ability of cobalt high speed steel bit for machining titanium alloy, improved working (machining) efficiency accordingly, originally hole of every bit drills on average needs more than 20 second, can only bore tens holes at most, only need 4～5 seconds and bore a hole now, can bore more than 100 hole at most.

The boring cutting test:

Titanium alloy material: hardness 43～47HRC; Drilling degree of depth 5mm (through hole); Roughness is less than Ra3.2; 500 rev/mins of the rotating speeds of air drill; Following table is the orthogonal experiment data of different apertures and drill bit different structure parameter, and totally 200 kinds of different apertures and drill bit different structure parameter amount at least 5000 of drilling hole amounts.

Table: orthogonal experiment data

Claims

1, cobalt high speed steel bit for machining titanium alloy comprises drill bit blade and drill handle part, it is characterized in that drill bit blade wedge angle makes 60 °, and relief angle is made 20 °