In the mass production cutting of tubes, sections, and solid bars up to 100 mm diameter, circular saws are dominating the image of the pre-production. High output, precision, and automation of preceding and follow up processes are the reasons for this sawing concept, whereas band saws are extremely suitable to cut small daily quantities, because they offer basic economic models.
According to RSA, there is still a great potential for rationalisation in the pre-production of mass production cutting in the diameter range from 100 mm up to 170 mm. This assessment, made by a company specialized in saw cut technologies, is confirmed by several customers and experts in this field. Blanks for die-formed parts, pistons, shafts, drums, and axes - just to name some parts - are more likely sawn on slow band saws though they are pro-duced in large batches. Until now, circular saws were not sufficiently flexible and productive for the efficient manufacture of a wide spectrum of workpieces. RSA has developed the new sawing machine RASACUT XXL purposefully for this wide spectrum of the pre-production.

Cutting times reduced by up to 90 %
For tubes up to 15 mm wall thickness and 170 mm diameter as well as for solid bars up to 160 mm diameter - previously a domain of band saws - RSA has specifically developed this circular saw. Customers who have al-ready used the RASACUT XXL during the past few months confirm that, according to the workpiece, the cutting time is up to 90 % below that of up-to-date band saws. Added to this is an improved cut quality with regard to per-pendicularity and surface roughness. This high increase in productivity is mainly due to the drive of the saw. With up to 40 kW, the saw drive attains a rated torque of up to 1,500 Nm which is consistent almost at any speed.

Wide part spectrum for a high degree of machine utilization
In spite of comparatively large batches, the cutting-to-length produc-tion is faced with the problem of small batches. Call-off-orders to keep stocks and consequently the capital tie-up small, are common practice as well as the just-in-time delivery to the own production or to the customers. In addition, the new circular saw from RSA copes with orders considerably faster compared to other cutting systems. According to customers, the RASACUT XXL is now sawing the yield of one sort of a whole shift within half an hour. According to the business manager Dipl.-Ing. Rainer Schmidt, RSA placed the focus during the development on a part spectrum as wide as possible as well as on short set-up times in order to ensure a flexible use and utilization of the saw. Work-pieces from 20 mm diameter upwards can be produced in fixed lengths be-tween 50 and 3,000 mm. Saw blade changes - e.g. from HSS to carbide - are made with only a few manual movements since the saw head is easily acces-sible. Usually it takes the operator only about five minutes to set up the entire saw. This is due to the ease in operating the control system with its simple job management and stored cut parameters.
In addition, the wide part spectrum faces particular challenges on the workpiece handling. For the process-reassured singling and feeding of the base lengths, a bundle loader and a flat magazine are used alternatively or in combination. After the cut, the direct interlinking to further processing steps such as deburring is possible. Sorting systems ensure a trouble-free removal of the material - particularly when different fixed lengths are sawn from the same base material.

For further information please see www.rsa.de. Interested parties may ask RSA for approximate cutting time values relating to workpiece.

By RSA