Walter Prototyp Paradur ECO HT extends the life of the tool

For manufacturers of tools, machining 1.2714 material is a challenge when it comes to the life of the tool. A company based in Saarland introduced Walter Prototyp Paradur ECO HT male some time ago and now ensures that the life of the tool is more than double.

"The demands of our customers in terms of used materials have increased steadily for years. High-quality and high-strength steels are becoming increasingly important for us for the manufacture of machine parts tools ", explains Markus Weber, director of the Schneider Werk St. Wendel GmbH & Co. factory KG. The medium-sized company based in Saarland is the threaded material 1.2714 (high-alloy tool steel) was increasingly a source of problems.

"The large amount of tools we used was unable to satisfy our needs during threading operations," explains Markus Weber."Court males were soon blunt and sometimes there are cracks on the edges.At that time, the amount of 15 threads was the best that could be. With this material, the chip damages the cutting edges and our average lifespan of male was only between two and fifteen threads. As an alternative to cutting male, we have tested milling of threads, but worn again, soon the cutting edges out. Milling thread proved to be unprofitable", explains Christoph Schneider company Chief.

To improve the process of threading, Schneider Werk makers got in touch with Walter AG, your provider of tools for many years. After having had a good experience in milling material 1.2714 with interchangeable plates, was a wise decision. Thanks to a good relationship with employee Michael Diesel, technical sales Walter Deutschland GmbH, he was willing to analyze the subject of threaded. The expert advisor to Walter, possessing high technical knowledge, has regularly worked for several years as a consultant for the most demanding and unusual machining challenges. Quickly identified the nature of the problem and was able to offer a solution.

Before threading, it is necessary to drill the hole. The quality of this hole has a considerable influence on cost, profitability and reliability of the process thread. The production of thread is one of the most demanding production engineering machining tasks. A particular challenge, the fact that the work piece is not threaded until the end of the manufacturing process.

For producing internal threads, there are basically three methods of production are available: threaded by cutting, threading (alternative without chip) rolling and milling of threads (which offers a particularly high process reliability). It is crucial for the selection of the appropriate method of production is to have a knowledge widest possible advantages and disadvantages of each method, as well as their practical limitations. Ultimately, the technical and economic parameters will be decisive.

If drilling tools and threaded make good couple, better will be the result, tolerance, the formation of chip, avoiding the bird's nest, customers require the best possible performance. Only tools optimally matched, produce the perfect thread.

The use of Walter Prototyp Paradur ECO HT to make threads in roller ring.

For Schneider Werk production, Michael Diesel proposed the use of the range of products of Walter Prototyp Paradur ECO HT male and suggested the adaptation of cutting strategy to satisfy the material. The male is high performance, HSS-E-PM and is suitable for use in a wide range of materials. This long chip materials range includes medium-resistance, short chip materials materials, abrasive materials with a tendency to welding, structural steel and high tensile strength steel (350-1300 N/mm)²), stainless steel, cast iron spheroidal graphite and malleable cast iron, copper and alloys of aluminum of long chip. The tool has proved its worth, especially when used for long chip materials and chip cuts with a tensile strength up to 1.300 N/mm²in conventional machines equipped with synchronous spindle. It has hard material THL and coating surface treatment additional, longer life of the tool, seamless cold. Versions of standard tools are available with output coolant axial or radial, also for use with lubrication (MQL) minimum.

For threaded blind hole, Paradur ECO HT has a Helix angle of R45 with entry form C or E, cutting geometry for optimal chip formation and extraction of chip even in deep holes. Short entry variant, form E, makes it possible to produce the thread up to almost the bottom of the hole. The cone diameter, prevents the risk of broken teeth.

In a series of tests, with emulsion, with oil lubrication and tests with several cutting parameters, until the desired tool life was finally reached. "Today we got the life up to 50 holes," explains Markus Weber. "Since the results have returned to be very economical," adds Christoph Schneider.

Paradur ECO HT ensures greater reliability in the process, even in deep, blind and thru, holes thanks to secure formation of chip. Universal use in a wide range of materials means that fewer tool changes are needed, and high speed cutting and long tool life, help to ensure the optimal use of the capacity of the machine. At the same time, the costs of cooling lubricants can be reduced thanks to the possibility of tapping in dry or MQL in steel, cast iron and aluminum alloys. "Since the introduction of the Paradur ECO HT, threading has become much better and more profitable", says Christoph Schneider. "Of course, to define the cutting speed, should take into account type of lubrication we are using".