Tech NEWS I/2011
Maximum performance at 6,200 bar
Heading the pump technology with the STREAMLINE PRO-I 125D
The 6,200 bar technology is steadily on its way to become the superior standard concerning waterjet cutting. At the EuroBLECH fair 2010 in October in Hanover, this trend could be clearly observed: No less than eight exhibitors invited their visitors to see a 6,200 bar pump performing on their booth. The advantages of the high pressure, of course, are numerous: The cut speed can be increased significantly depending on the material, the cut edge quality can be enhanced thanks to reduced tapers, and, last but not least, the user can save costs concerning abrasive, energy, and water consumption.
High flow rate and steady pressure signal
The pump with the most powerful performance in this segment is the high pressure pump STREAMLINE PRO-I 125D. At maximum pressure, its high-power 93 kW (125 PS) engine allows for a flow rate of 5.8 l/min. Compared to the STREAMLINE PRO-I 60S, it can thus operate twice as many cutting heads simultaneously (see download to the right). Therefore, the user is able to produce twice as many pieces at the same time and with almost the same required floor space. Additionally, the high flow rate makes it possible to assemble a cutting head with an orifice size of up to 0.38 mm in diameter. So even cutting extremely thick or solid materials is no problem at all.Concerning the pressure signal, KMT also offers a high standard with the STREAMLINE PRO-I 125D: The cutting pressure of 6,200 bar is produced with the help of two pressure intensifiers operated with a phase shift that pump the cutting water to the cutting heads. This way, the pressure drop resulting from the shifting of the plungers can be nearly leveled out. Combined with the interconnected 1.6 l pressure accumulator, this leads to a virtually continuous pressure signal. Thus, the PRO-I 125D is optimally suited for waterjet cutting at the highest level.
High quality products for satisfied customers
For KMT, customer satisfaction is the first and foremost goal. Therefore, feedback on its products and services is very important for the company. All the better if the feedback is positive as in the case of Absolute Dimensions LLC from Wichita, Kansas (USA). The Company was founded in 2004 and is currently certified by Cessna and Hawker Beechcraft. It generates 50% of its business with waterjet cutting. When asked about KMT, Steve Brittain, co-founder of the company, says: “We have been very impressed with KMT from day one. With their machines we have been able to cut up to 20 hours per day, six days a week.”
Ultra high pressure cutting
Since the introduction of the 6,200 bar (90,000 psi) pumps, Absolute Dimensions is working with that high end technology. As Brittain states: “The 90k pump is at least a 30% improvement over the 60k pump on cut speed. And we’re using the same amount of abrasive per minute – not per job – so abrasive costs have gone down significantly. With the 90,000 psi, there seems to be less dilation at the bottom of the cut and we can cut significantly faster, in most cases at least 30 or up to 40%. So the 90k pump has saved us tons of money in abrasive and labor costs since we have switched.”
To put the cutting speed into figures: For the Aerospace industry, Absolute Dimensions mainly cuts 8“ (20 cm) aluminum with a cut speed of 1 ipm (2.5 cm/min) and 4“ (10 cm) titanium with a cut speed of 4-5 ipm (10-13 cm/min).
However, the applicability of waterjet cutting does not end here. According to Brittain, “waterjet cuts real thick materials, real thin materials and everything in between. And KMT is the best manufacturer for pumps in the waterjet industry. The future is definitely in waterjet cutting. We like what we’re seeing in the advancements of KMT and how they progressively improve their products.”