Aluminum alloys are readily machined and offer such advantages as almost unlimited cutting speed, good dimensional control, low cutting force, and excellent life. Relative machinability of commonly used alloys are classified as A, B, C, D, or E.

Cutting Tools
Cutting tool geometry is described by seven elements: top or back rake angle, side rake angle, end relief angle, side relief angle, end cutting edge angle, and nose radius.

The depth of cut may be in the range of 1/i6-1/4 in. for small work up to l/2-\l/2 in. for large work. The feed depends on finish. Rough cuts vary from 0.006 to 0.080 in. and finishing cuts from 0.002 to 0.006 in.

Speed should be as high as possible, up to 15,000 fpm.

Cutting forces for an alloy such as 6061-T651 are 0.30-0.50 hp/in.3/min for a 0° rake angle and 0.25-0.35 hp/in.3/min for a 20° rake angle.

Lubrication such as light mineral or soluble oil is desirable for high production. Alloys with a machinability rating of A or B may not need lubrication.

The main types of cutting tool materials include water-hardening steels, high-speed steels, hardcast alloys, sintered carbides and diamonds:

1. Water-hardening steels (plain carbon or with additions of chromium, vanadium, or tungsten) are lowest in first cost. They soften if cutting edge temperatures exceed 300^0O0F; have low resistance to edge wear; and are suitable for low cutting speeds and limited production runs.

2. High-speed steels are available in a number of forms, are heat treatable, permit machining at rapid rates, allow cutting edge temperatures of over 100O0F, and resist shock better than hard cast or sintered carbides.

3. Hard-cast alloys are cast closely to finish size, are not heat treated, and lie between high speed steels and carbides in terms of heat resistance, wear, and initial cost. They will not take severe shock loads.

4. Sintered carbide tools are available in solid form or as inserts. They permit speeds 10-30 times faster than for high-speed steels. They can be used for most machining operations.

They should be used only when they can be supported rigidly and when there is sufficient power and speed. Many types are available.

5. Mounted diamonds are used for finishing cuts where an extremely high-quality surface is required.

Related post


James Feder said...

Much thanks for composing such an intriguing article on this point. This has truly made me think and I would like to peruse more. Steel Foundry

Amy Wong said...

Today I came to my friend's place to have a drink and chat, and all this time she sat at the computer I was very surprised but she sat and played in an online casino grand bacarat casino how wins and decided to try it myself now my ears do not ottyanes

Curt Lennix said...


The internet today is full of SCAM ADS, mostly in comments of various sites and blogs. A large number of individuals have been victims of scam and lost a lot of money to SCAMMERS. Most of the common scam you can see are -:

But here is a good news to everyone who has been a victim of INTERNET SCAM❗️
You can get your money back from the scammer, and can even get more than what you lost, No Authorities will not been involve just the genius of our skill.

We are PYTHONAX ! A group of skilled Hackers who have dedicated our time to helping individuals to get back thier money from INTERNET SCAMMERS. A research was carried out and an approximation of more than $3billion USD annually was said to be lost to INTERNET SCAM. This is so wrong and that’s why we have decided to help individuals get thier money.

We use a RAT(Remote Access Trojan) to take over the SCAMMER(s) device(Phone or Computer) and take back your money by accessing their Bitcoin wallets or Bank Account. Most of this scammers use their Bitcoin to save money they get from SCAM activities. This is because Bitcoin keeps the money hidden from FINANCIAL INSTITUTIONS BOARD from getting to see the money they can’t give account for.

If you have been a Victim of INTERNET SCAM, then you should contact us via the Email below

2020 © All Right Reserved.

Photo Tour said...

There are some interesting deadlines in this article but I don’t know if I see all of them heart to heart. There is some validity however I’ll take hold opinion till I look into it further. Good article , thanks and we want more! Added to FeedBurner as effectively

oshwin said...

Thanks for sharing the best information and suggestions, I love your content, and they are very nice and very useful to us. If you are looking for the best 304 Stainless Steel Pipe, then visit 304 Stainless Steel Pipe. I appreciate the work you have put into this.

markson said...

This projecting is comprised of non-ferrous metals. It requires some an ideal opportunity to set up (half a month), after which the creation pace of around 5 to 50 pieces/hour-form is accomplished. The covering of 'acetylene residue' is applied to steel pits.Sand Casting

Post a Comment

free counters