Horn USA has introduced the new DR-Large modular reaming system for use in the machining of large bores.
The latest DR tool offers easy handling and high-precision thanks to the proven technology of the DR system. The large number of cutting edges and high feed rates reduce cycle time and machining costs.
Modular construction and solid carbide inserts offer the user exceptional flexibility. Tool setting is not necessary when exchanging the cutter’s head as HORN offers reconditioning service for the DR-Large system.
The versatile and powerful interchangeable high-feed reamer is perfectly suited for finishing large bores from Ø140 mm (5.512”) to Ø200.2 mm (7.881”).
The modular construction of the reaming tools can be extended to any length with beta module standard components. The beta module interface is ABS-compatible. HORN offers six types of cutter heads to cover the entire range of diameters in 10 mm (.394”) increments.
All cutter heads are manufactured with internal through coolant to each cutting edge. The custom insert interface offers extreme precision and insert interchangeability within microns.
High-precision, high-feed reaming is a very economical machining process compared to the boring of tight tolerance holes.
The motivation behind DR-Large is the customer demand to replace large diameter tools with inserts brazed into a fixed position and tools that are diameter specific.
The fixed tools require delicate handling, are often heavy, require skilled users, and present logistical challenges when replacing worn tools. HORN offers a perfect solution with the DR-Large pre-calibrated exchangeable reaming head.
Dorian Tool has some very detailed technical information in their Solution Tool catalog to address deep hole boring. First we're going to list the fundamental rules of selecting the correct boring bar and then take a deeper dive into the fundamentals of troubleshooting.
If you want more information, technical specifications and much more detailed information on troubleshooting you can download the Solution Tool catalog below.
DEEP HOLE BORING
The first machine driven deburring tool patent was filed in 1911 by F.A. Pica patent # 1,008,363. The original tool was an adaptation of a boring bit to accommodate a countersink portion on the backside of the hole.
To set or activate the deburring process was a laboring process. After boring each hole the machinist must stop the spindle, move a mechanism to engage the deburring insert, start the spindle to begin the deburring process and then again, stop the spindle and disengage the insert and retract.
The size and consistency of the countersink was somewhat guesswork at the time, but ultimately did the job.
In 1943 hole deburring saw the first dramatic update when A. Fried separated the boring and deburring process with patent # 2,314,084.
This helped to achieve a higher quality and accommodate the higher production volumes of the day.
This improved the machining process which could be set to perform desired deburring operations.
But with this tool the cutter still had to be projected and retracted by hand which still made it labor intensive.
The onset of 1950’s led to many updates in deburring leading up to the high volume production requirements of today.
It was in 1952 when the most notable change was by S.A. Cogsdill. He eliminated the hand operated deburring process and provided an adjustable tool with his patent # 2,620,689. This tool can be set to perform desired chamfer sizes and is activated by a spring and plunger, taking the hand operation out of the process.
With this improvement, deburring became an automated process.
Since 1960, E-Z Burr has been providing innovative and versatile deburring solutions for customers. Over the last 5 years they have introduced and expanded their Carbide Series of deburring tools to produce successful results on hard to machine materials and higher production volumes. “From the very start, our goal has been to provide tools that are durable, dependable, easy to use and maintain, while offering our customers a fair and reasonable price,” says Bill Robinson, President of E-Z-Burr. “We are always looking for new, innovative ways to meet the needs of our customers.”
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