Turnkey hydrostatic boring machine project for a military vehicle manufacturer in India
8 Apr 2021
MP6-RAM FLOOR TYPE HYDROSTATIC BORING MACHINE_ Indian defence manufacturer
JUARISTI has developed a hydrostatic boring machine for an important Indian manufacturer of defence vehicles with a very large set of ad-hoc accessories for manipulating extremely hard materials.
This year JUARISTI received a request from a very special customer for a complex project. The customer was an Indian manufacturer of heavy military vehicles that required a solution for machining parts made with Armox steel, which is an extremely hard material. The managers of the company contacted JUARISTI because they were already familiar with items from the MP-RAM series, which are JUARISTI’s hydrostatic mobile column boring machines. Their characteristics fit this project perfectly because of their high cutting capacity and maximum precision thanks to integral guiding on all axes and the advanced precision technologies they incorporate.
The most distinctive thing about this project is that JUARISTI designed a complete tooling set for the customer’s pieces, which were very complex to manipulate because of the several different angles machining needed to be done from. There are more than one hundred pieces that were acquired and supplied according to the customer’s request. The machine, on the other hand, provides multiple structural advantages, among which are the long travel runs on all axes (6,000, 2,000, 1,500 and 1,000 on X, Y, Z and W), high power (71kW) and its high spindle torque (5,510 Nm).
Like all the machines in the MP-RAM series all the structural components are manufactured with grey nodular cast iron and all the axes are hydrostatic on large ground guides. The hydrostatic guiding reduces the friction coefficient and allows extremely smooth movement, achieving very high precision in very heavy machines.
JUARISTI designed a complete fixture set for the customer’s components, which were very complex to manipulate because of the several different machining angles
Like in other hydrostatic boring machines presented above, the machine being sent to India has RAM Precision Technology, which is a triple automatic compensation system for RAM bending, head rolling and column tilting. The compensation systems work using three proportional valves that activate depending on the RAM position. The compensation algorithms vary depending on the head being used by the machine at any given time.
This boring machine is especially notable for its multitasking capacity, because it has heads intended for different machining techniques and an AAC system for automatically changing them. The boring spindle is also notable. It has a 160 mm diameter, which is perfect for demanding boring operations in deep machining areas because of its axial travel of up to 1,000 mm. The machine also includes an automatic orthogonal milling head with 46 kW of power, 2,000 Nm of torque and automatic positioning every 1°x1° and a 360 mm D’Andrea facing head with a maximum facing diameter up to 800 mm and a radial U travel of 120 mm.
The last #theunstoppable solution for 2020 comes equipped with several automation solutions and technologies for increasing productivity and facilitating unattended machining operations depending on the customer’s requirements. All JUARISTI automation systems are manufactured within the group, so they can be integrated with the machines perfectly and maximum synchronisation can be guaranteed.
In the automation section, the chain type automatic tool changer (ATC) with a capacity of up to 40 tools is especially notable. It can make tool changes in horizontal or vertical mode on either the boring spindle or the orthogonal automatic milling head.
The machine includes a second tool changing system in the AAC that is used for changing special very large or heavy tools, which are included in the project for the Indian customer. The automatic attachment changer (AAC), in its own right, has four positions and contributes to reducing unproductive times between machining tasks. Lastly, the machine has different calibration systems for optimising global precision, including systems for measuring the diameter and length of tools with a laser probe.
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