Heller HF series Click image to enlarge

Heller Machine Tool's HF series five axis horizontal machine centres are designed for machining complex prismatic parts from lighter, smaller workpieces to heavier parts with a table load of up to 363 kg (800 lb).

In the series of two machines, the fifth axis is provided by the workpiece on a swiveling trunnion with rotary table or a pallet changer for higher volume production. Users can specify from a range of four spindle packages based on the material they are to process. Spindle speeds up to 18000 rpm and torque up to 354 Nm are available.

Heller HF machining exampleClick image to enlarge

According to Heller, the main target groups of the HF series are the general machine industry and automotive suppliers. The two new machine models are entry into a popular size range for these industries. The HF 5500 offers a work area of 900 x 950 x 900 mm (X/Y/Z), and the smaller HF 3500 has a work envelope of 710/750/710 mm (X/Y/Z).

With three linear axes in X, Y and Z and two rotary axes in A and B integrated into a rotary table on a trunnion, the HF machines are designed for five sided machining and simultaneous five axis machining. The machines may alternatively be equipped with a lift-and-rotate pallet changer for series five sided production. Standardized pallet automation solutions may be supplied by Fastems or Schuler.

Contrary to conventional five axis machining centres, HELLER’s concept is not only based on single-part clamping, but provides the possibility of multiple clamping or the clamping of very large components (transmission cases using ‘window-type’ fixtures).

The NC toolchanger is equipped with two NC axes for short idle times and consistent operation. The chain type tool magazines capacities are: HSK63: 54, 80, 160 or HSK100: 50, 100,150.

As standard, Heller offers the SC63 SpeedCutting unit (18,000 rpm, 100 Nm) equipped with an HSK-A 63 spindle taper. Optionally available is the PC63 PowerCutting unit (12,000 rpm, 201 Nm), also equipped with an HSK-A 63 spindle taper, and the SC100 SpeedCutting unit (12,000r pm, 201 Nm) as well as the PC100 PowerCutting unit (10,000 rpm, 354 Nm), both equipped with an HSK-A 100 spindle taper. The machines provide 8000 (HF3500) and 10,000 Nm (HF5500) of feed force for handling even the most difficult materials without interruption or strain.

Recently, the company demonstrated the capabilities of the HF series. Using a 100 mm diameter face milling cutter, a chip removal rate of 470 cm3/min was achieved, machining 1.2312 steel with a feed of ap = 3.5  mm and an engagement width of ae = 75mm.

An optional Speed Package enables acceleration of up to 10m/s2 and rapid speeds of up to 90 m/min to be achieved on the HF series. This provides a reduction in chip-to-chip times of approximately 10 perc ent.

HF series machines are equipped with a Siemens control and a double pivoting main operator panel with a 24 in. touchscreen as well as a newly developed Heller user interface for maximum ease of operation.

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