CN205414517U

CN205414517U - Minor diameter high -speed steel covering rimer

Info

Publication number: CN205414517U
Application number: CN201520967892.2U
Authority: CN
Inventors: 邓楠; 徐戬
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2016-08-03
Anticipated expiration: 2025-11-30

Abstract

The utility model relates to a minor diameter high -speed steel covering rimer, including rimer and cutter arbor, the rimer entad the angle be 0 45 /, the cutting edge inclination is 5, the anterior angle is 12, the relief angle is 12, the groove angle is 50, the circumference is equipped with two 30 phi 3mm's lightening core outside the cutting edge portion. The processing hole of aluminium alloy material's thin wall covering can be processed to this covering rimer, has reduced the friction on back knife face and smear metal surface, reduces the cutting temperature that the friction leads to, is favorable to the chip breaking to be discharged, and high pressure heater work efficiency rate and processingquality are carried to the machining precision in assurance rate thin wall covering hole.

Description

A kind of minor diameter high-speed steel enveloped counter bit

Technical field

This utility model relates to a kind of minor diameter high-speed steel enveloped counter bit, belongs to tool sharpening field.

Background technology

In machining, the processing that commonly used drill bit, reamer and reamer are carried out, the most commonly used various counterbit carries out the processing of chamfering, end face and counter boring, but at aviation field, it is frequently necessary to process the processing in aluminium alloy thin-walled eyelid covering hole, due to thin-walled skin typically at about 1.5mm, existing hole machined instrument cannot ensure the crudy in its hole.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of minor diameter high-speed steel enveloped counter bit, it is achieved that the processing to aluminium alloy thin-walled eyelid covering hole.

For solving problem above, concrete technical scheme of the present utility model is as follows: a kind of minor diameter high-speed steel enveloped counter bit, including counterbit and knife bar, the centripetal angle of counterbit is 0 ° 45 ', cutting edge inclination is 5 °, and anterior angle is 12 °, and relief angle is 12 °, groove angle is 50 °, and blade part excircle is provided with the lightening core of two 30 ° of Φ 3mm.Anterior angle is 12 °, and cutting edge is sharp, and machinability is good, relief angle is 12 °, decreases the friction of rear knife face and chip surface, reduces the cutting temperature that friction causes, decrease the cutting resistance caused because of frictional force, it is ensured that cutting tooth has enough cutting hardnesses, and cutting edge inclination is 5 °, cutter is easily worked, and groove angle is 50 °, increases appearance bits and chip space, chip can discharge major part from side, chip removal is effective, and centripetal angle is 0 ° 45 ', reduces the frictional force during using.

Preferably, described counterbit afterbody is provided with 1:50 internal taper hole.

Preferably, described knife bar is made up of leader, tapered portion and caudal peduncle part, and tapered portion is corresponding with the taper hole angle of counterbit.

Preferably, described leader relative to the jerk value of caudal peduncle part cylindrical in 0.02mm.

What this utility model brought has the beneficial effect that this enveloped counter bit can process the processing hole of the thin-walled skin of aluminum alloy materials, decrease the friction of rear knife face and chip surface, reduce the cutting temperature that friction causes, chip breaking is conducive to discharge, the machining accuracy in fraction thin-walled skin hole, improves working (machining) efficiency and crudy.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of minor diameter high-speed steel enveloped counter bit.

Fig. 2 is the structural representation of drill bit.

Fig. 3 is Fig. 2 A-A sectional view.

Fig. 4 is Fig. 2 B-B sectional view.

Fig. 5 is the structural representation of knife bar.

Wherein, 1-counterbit, 2-knife bar, 3-caudal peduncle part, the centripetal angle of 4-, 5-cutting edge inclination, 6-anterior angle, 7-relief angle, 8-groove angle, 9-lightening core, 10-internal taper hole, 11-leader, 12-tapered portion.

Detailed description of the invention

As Figure 1-Figure 4, a kind of minor diameter high-speed steel enveloped counter bit, including counterbit 1 and knife bar 2, the centripetal angle of counterbit 14 is 0 ° 45 ', and cutting edge inclination 5 is 5 °, and anterior angle 6 is 12 °, relief angle 7 is 12 °, and groove angle 8 is 50 °, and blade part excircle is provided with the lightening core 9 of two 30 ° of Φ 3mm.

Preferably, described counterbit 1 afterbody is provided with 1:50 internal taper hole 10.

Preferably, described knife bar 2 is made up of leader 11, tapered portion 12 and caudal peduncle part 3, and tapered portion 12 is corresponding with internal taper hole 10 angle of counterbit 1.

Preferably, described leader 11 relative to the jerk value of caudal peduncle part 3 cylindrical in 0.02mm.

Above-described is only preferred embodiment of the present utility model.It should be pointed out that, for the person of ordinary skill of the art, on the premise of without departing from this utility model principle, it is also possible to make some modification and improvement, also should be regarded as belonging to protection domain of the present utility model.

Claims

1. a minor diameter high-speed steel enveloped counter bit, including counterbit and knife bar, it is characterised in that: the centripetal angle of counterbit is 0 ° 45 ', and cutting edge inclination is 5 °, and anterior angle is 12 °, and relief angle is 12 °, and groove angle is 50 °, and blade part excircle is provided with the lightening core of two 30 ° of Φ 3mm.

2. minor diameter high-speed steel enveloped counter bit as claimed in claim 1, it is characterised in that: described counterbit afterbody is provided with 1:50 internal taper hole.

3. minor diameter high-speed steel enveloped counter bit as claimed in claim 1, it is characterised in that: described knife bar is made up of leader, tapered portion and caudal peduncle part, and tapered portion is corresponding with the taper hole angle of counterbit.

4. minor diameter high-speed steel enveloped counter bit as claimed in claim 3, it is characterised in that: described leader relative to the jerk value of caudal peduncle part cylindrical in 0.02mm.