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Posts Tagged ‘Perimeter’

Tips For Keeping Your Vehicle's Interior Cool

October 1st, 2009

With summer finally upon us, millions of drivers are remembering one of the drawbacks of warm weather: a baking car interior. Left in the sun, the inside of your vehicle can heat up to the point that it practically seems like an oven. Even if you leave your automobile in the shade, the temperature inside can rise sharply. By the time you climb back into your car, turning on the air conditioner may not make much of an impact. Below, I’ll provide four tips that you can use to keep your vehicle’s interior below oven temperatures during the summer.

#1 – Crack Your Windows

Before leaving your vehicle to roast in the sun, crack each of your windows a half-inch. This helps the inside temperature in two ways. First, hot air can easily escape throughout the day. Second, the circulation will allow even the lightest breeze to push the heated air out of your automobile. It's important to remember that heat builds pressure. If you don’t crack your windows, you might come back to your car and wonder how they burst.

#2 – Invest In Tinting

Tinting your windows does more than merely keep prying eyes from peering inside. It can play a key role in lowering your interior's temperature while your automobile sits in the summer sun. This is especially true if you use it in conjunction with leaving a half-inch crack around the perimeter.

Keep in mind that every state has slightly different rules regarding tinting. Some restrict tine allowance to the rear windows, while others limit the darkness of the tint allowed. Check with your state’s Department of Motor Vehicles to make certain you’re complying with the law.

#3 - Invest in A Winsheild Shield

You’ve probably seen these in other vehicles. Several companies make shields that you can put on your dashboard as you leave the car. The cheap kind (usually less than $10) are made from cardboard; they unfold to block most of the windshield. Shields that are more expensive are made from materials that not only block the sun’s rays, but also reflect them.

These shields can lower the temperature in your car by over 20 degrees Fahrenheit, which will reduce the load you place on your air conditioner.

#4 – Park In The Shade

When shade is available, park under it (when you can do so legally). Too often, people fail to plan ahead and only look for the parking spots closest to wherever they're visiting. An hour spent on the baking asphalt of a parking lot can cause your interior's temperature to rise dramatically. Park in the shade, even if it means having to walk a little further. When you come back to your vehicle, you'll be thankful you did.

There’s a lot you can do to keep the inside of your car cool during the summer. Crack the windows, park in the shade, and buy a windshield blocker. A little planning upfront can provide plenty of comfort later.

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Machining Fundamentals

January 7th, 2009

cad

Tooling Offset
I thought this would be a great place to do a quick talk on Tooling Offset.  Tooling Offset is the amount you must “Offset” the tool while machining.  For example, the tool paths that we created in CAM Software are located in the dead center of the tool unless you do something about it.  Most times you set the tool offset in your CAM program, but sometimes you might have to do it during the machining phase, depending on your machine.

What if you had a one-inch diameter tool, we will use an end mill in this example, and you needed to take off .25” around the perimeter of a 5” by 5” block of aluminum?  Without tool offset, the tool path would be around the perimeter of the block.  The end mill would take off half of its diameter or .5” inches.  You need to offset the tool so this does not happen.  In this case you would offset the tool outside of the block by .25”, then the end mill would take off .Twenty-five inches of material.

Zeroing the machine out
When beginning your machining, you always need to zero out the machine.  You need to let the control software know that this is going to be the starting point for the whole project.  When “Zeroing” out the machine, a lot of the time you will use an edge finder when milling.  Most times in CNC Plasma Cutting, you will just pick your starting point on the steel and begin the program there.

The final “Part”
Parts are the outcome of your work.Unless you are making art pieces.  Parts need to be made to specification.Machinists will check the parts they are making as they come from the CNC Machine.  Many times, they will use a go/no-go gauge.  With a go/no-go gauge they can quickly check out the critical dimension of the part and reload the machine.

Chips?
Machinist call the material being removed “Chips.”  This is because most things that are machined are metal and they come off the part in chip form.  Chips can be very sharp and dangerous.You have to be aware that chips will be flying around as they are cut away.  Quite a few machines will have enclosures around them to block these chips from flying around.

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