GF AgieCharmilles: Accuracy in micrometers

Achieve fine-grained mirror finish with record time. GF AgieCharmilles has set a new milestone in Swiss machinery manufacturing with the MIKRON HSM 400, 400U, 500 LP Precision series.

Optimal conditions

A new era was born on the shores of Lake Biel in Switzerland. Recently MIKRON HSM 400, 400U, 500 LP Precision series high speed milling machines were introduced at an expensive single piece manufacturing cost. In the process of manufacturing MIKRON HSM LP Precision, experienced technicians carefully selected machine components to create a unique machine. No machine can be shipped before it is fully tested, and its superior performance in machining highly demanding workpieces can be proven without trial.

GF AgieCharmilles uses a process-safe design for tool measurement on machine tools and is the only machine tool manufacturer in Europe to offer this technology. The potential of this function has long been recognized, so for many years, people have been committed to the development of intelligent machine tools. GF AgieCharmilles has produced astounding results: Intelligent Tool Measurement (ITM) - Optical tool measurement at full spindle speed. “Without this epoch-making technology, it is impossible to imagine that MIKRON HSM LP Precision will have today's practical performance,” product manager Georg Scheiba emphasizes the importance of this technology.

Advances in technology have also made work more efficient, and every MIKRON HSM LP Precision customer has received tremendous support from GF AgieCharmilles. Expertise in product training and high-precision guidance contribute to efficient, high-yield production.

Precision milling

MIKRON HSM LP Precision brings precision milling to a new era. The tool maintains high precision and minimal noise when the spindle is running at high speed. Only in this way can the surface quality and contour accuracy of MIKRON HSM LP Precision be achieved. Since heat loss occurs on all motor beds, the drive process of precision machine tools must be cooled accordingly. Each linear and oscillating shaft has its own cooling circulation system. At the same time, OptiCool cooling technology enables the spindle head cooling system to achieve little-known thermostats to date. The MIKRON HSM LP Precision prevents heat from flowing from the drive motor into the bed through an improved cooling management system, which guarantees geometric stability and ensures extremely high repeatability during component operation.

But pay attention! If the minimum machining step of MIKRON HSM LP Precision is accurate to 100 nanometers (1/10000 mm), but the error in measuring the geometry of the tool can lead to inaccurate workpiece accuracy, is it not beneficial to the user? Everyone who tries to precisely mill the surface of a workpiece using a tool of different diameters thinks this is not possible, but this must be done to ensure the accuracy of the segments of the workpiece that are machined with different tools.

An important reason is the working principle of traditional laser tool measurement. Different tool shapes result in different laser flooding coefficients, which cause a change in the absolute reference of the Z axis. Impurity particles or oil droplets adhering to the tool may also cause the measurement to deviate from the actual tool profile.

GF AgieCharmilles' solution is very different. The unique Intelligent Tool Measurement System (ITM) displays the entire tool end with a diameter of 12 mm or less on modern image sensors. The digitally displayed tool geometry is first digitized by special software and then measured: ITM is the first to achieve a Z-axis absolute reference tool measurement in the micrometer range. This is a technological breakthrough that enables new and efficient ways of working.

Result

High-precision machining ranges from minimally invasive surgery, small through-flow parts to tool and mold manufacturing (such as LEDs, reflectors or micro-tools). The accuracy level of the MIKRON HSM LP Precision machine for reflector applications is detailed here.

The basic material to be processed here is CrVMo steel (C1.7 Mn0.3 Cr17 Ni- V3 Mo1) made of high-quality alloy by powder metallurgy process, and its hardness is about HRc 60. Precision machining with a machining allowance of less than 10 μm In the process, in the case of average metal material loss, the average roughness of the entire workpiece surface can reach Ra = 0.020 μm = 20 Nanometer = 2 / 100"000 mm. The roughness Ra = 0.020 μm conforms to the ISO roughness level N1. The result can be measured in the feed direction and the cutting depth of the tool.

Buffing And Polishing

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