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Helical Milling improve drilling productivity

2015-4-8    來源:鍋爐配件    作者:鍋爐配件廠家  閱讀:次  【打印此頁】

性福宝下载 Spiral milling, including three-axis synchronous feed: Z axis synchronization insert runtime X, Y axis, expanding drill size. This method requires opening the machine with the ability to insert said its performance exceeded the flat drill, twist, perforation, and flame cutting, and other technologies. Spiral milling supporters say it produce a sufficiently smooth surface without the need for fine boring.

"If the spiral milling between the tool and the workpiece in any case only a small contact area, the required cutting force than the flat drill small," Konrad Forman Ingersoll tool company product manager said, "and it In addition to cutting flute, fragments of material, the friction between the wall of the hole. "

"Rail milling primarily consists of two steps: Insert and then run around the track and spiral milling is continuing to do the centerline milling spiral movement, which makes cutting faster, more smooth milled surface is determined by the size of the hole program... rather than the dimensions of the tool determined. This reduces the storage requirements of the drill, as no longer equipped with a drill bit for each hole size. "

性福宝下载 Tool Features

性福宝下载 Many factories tend to use Ingersoll Hi-Pos + indexable milling or Form-Master + button face milling cutter spiral. The former is suitable for shallow hole, which is more suitable for deep hole. Even the guide tip hole with Hi-Pos + milling cutter can also be good enough without fine boring surface.

Given the geometry of the cutter helical cutting edge, are suitable for the two helical milling cutter. Cutter is taking a spiral path, and can cut out straight sidewalls and bottom of a 90-degree. Forman said: "Relatively speaking, the traditional square tool, even take the same path, nor in a blind hole produced a square corner, but may also leave ring marks on the sidewalls."

性福宝下载 Helical cutter blade in a more gentle way Qieru Jia workpiece, like paper cut like scissors. This method of milling out by surface effects and carbide end mill milling the same effect.

"In any spiral milling process, paying particular attention to the question: In carbide open vertical hole, when to prepare a separate power supply, ready to remove swarf generated openings," Forman advice: "Because cutter geometry shape itself does not provide any channel to rule out cutting debris. If it is horizontal drilling, the force of gravity debris can be discharged, but for vertical drilling, you need to use compressed air to blow out the debris. "

A lot of mold and die factory experience proved: No additional settings or spiral milling machine tools to convert between (for large workpieces, in a huge move back and forth between the cost of the machine). "In the traditional method of drilling, many mold and die manufacturers often because of power problems had to be moved heavy workpieces from heavy drilling jig boring. If spiral milling method does not exist in this issue Helical Milling friction problem solving, and use low-power machine out of a larger hole. If you need to fine boring, then the work on the same machining center can be done. "

 
Logan Machine Works Company spiral milling method, with Ingersoll's Form-Master + button face milling,
性福宝下载 In hard blanks out a large through hole. Previously used method is time-consuming than 1:16.

Field Report

性福宝下载 Several examples below illustrate how some plants benefit from spiral milling techniques.

Logan Machine Works, Inc. (Alabama Phoenix) per year to produce 60 trunnion blocks, each block must be marked with the trunnion several different sizes of holes. Before, Logan oriented company with a large hole drill holes to play, then flame cutting, fine boring finally be finished. Now, Logan company just spend 30 minutes on a large mechanical parts out of a 4-inch diameter hole, before the same job takes eight hours, and sometimes also need to flame cutting. In addition, Logan company on the same machine for milling and fine boring holes, no two settings, there is no need to machine the workpiece during shuffling.

Logan adoption Form Master + cutter to 800sfpm (surface feet / minute) and 85ipm (inch / min) feed rate for milling parts. For small holes and thin blank, Logan's previous method uses a first pilot drill, then laser cut, then fine boring. Now, Logan company with Ingersoll Quad Drill + cutter to 650sfpm and 8ipm feed rate spiral milling, will shorten the time spent from one minute to 10 seconds, and without any fine boring. In addition to speeding up the production rate outside, Quad Drill + cutter also extend the life of the blade.

 
Spiral milling process, the tool in the work piece when Qieru Jia orbiting around the workpiece,
Drilling faster rate than its opening, and can simultaneously reduce friction.

As a result of the helical milling, Deering Machine Company in each hole (from 1 inch to 1.5 inch diameter holes) on 15 minutes saving time. "Spiral Milling power required is smaller than the progressive twist," Steve Deering Deering president said. Deering's previous method uses a twist. At that time, Ingersoll's John Spray also tried to sell spiral milling In this way, he is still a live demonstration of a spiral milling drilling process.

"I saw the demo, but then I could not believe my eyes," Deering said: "Who can believe that the one carbide end mill to cut a blank, you can use like a bottle opener unplug Like plug a hole to play. "

性福宝下载 Today, spiral milling has become a large hole cut standard methods. Deering using 0.625 inches of Hi-Pos + cutter to hit 1.125 inches of the hole, with 0.75 inches cutters to play a greater number of holes, the feed rate is 61ipm.

A large Forge Texas spiral milling to process all of the guide pins holes, will shorten the original work eight hours to 1.5 hours. Previously, the company uses a flat drill, open up the hole needs fine boring. Since the adoption of the spiral milling method, since it eliminates the need for fine boring this step, the light can save this one cost $ 35,000 per year.

In a day of production, the thermal expansion of the bottom mold can cause mold base deviations occur, in order to avoid this from happening, the company is among the die holder opened a slot of about 0.005-0.010 inches wide. "Spiral Milling help us save time, improve the design of the mold base," the manager said: "These are flat drill can not be done."

性福宝下载 Nashville, Tennessee, Vaughn Manufacturing Co. The company is mainly for home appliances production of stamping dies, according to the company is expected, since the use of a spiral milling company in each mold seat saving $ 100. Vaughn Company before drilling method used is flat, the company director Thomas Austin said:. "The larger the hole, the greater the cost savings First, we do not like the twist like openings; secondly, machine power is not a problem, and this One problem frequently occurs when drilling large holes. "

"With spiral milling cutter can be many small chips after another, rather than a one-time gradually cleared out," Ingersoll's Konrad Forman said: "This new approach reduces friction when compared to the large-scale drilling. next, if you let the modern low-power CNC machining center flat drill a big hole, had not for a while they will fail or crash. "

In general, the specific pore size of the tool diameter is 2: 1. For example, to place a 2.5-inch hole, you should choose a 1.5-inch Hi-Pos + tool. Forman said: "The choice really depends on what tool toolmaker your liking, but overall 2: 1 ratio to give clean chips leaving more space."