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Flowforming Lathes

BOKO 3D-55-CNC Flowforming Machine

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The lathe is made to produce Pneumatic and Hydraulic High Pressure Cylinders of various Diameter, Length and Thickness combinations.

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The Hydraulic Spinning Lathe, make BoKo, manufactured in year 1994 is equipped with three working rollers, piece ejector, oil cooling equipment and lubrication unit.

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Headstock is of welded and stabilized steel, with interior ribs to give a larger hardness. It contains the main spindle in tempered and rectified steel, mounted on special bearings to support the radial and axial efforts. At the end, there is the mould coupling according to DIN 55027 size 15.

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Inside, there is a set of gears formed by the 3 axis and the cog-wheels, made in alloyed steel, tempered and rectified and moved by the motor, which allows to obtain speeds without notching from 50 to 600 rpm.

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This motor is 82 kw power. It is three phase and cooling forced by an independent motor.

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Bench is stabilized steel plate to avoid any deformation. It has some guides for the slides working system in tempered and rectified steel in all its length.

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These guides of the working zone are protected by means of telescopic and metallic protection systems. Inside the bench, there is a decantation system to let the oil and cooling liquid go out easily.

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Main Slide, it slides along the bench guides over lineal roller units. At the end on top of it, there are three transversal carriages at 120 degrees, which hold the working rollers.

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The transversal movements of the working rollers are moved by their ball spindles.

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The working rollers are mounted on tempered and rectified steel axis. To support the radial efforts and axial stresses there are a combination of various kinds of bearings like needle bearings.

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The three rollers are adjustable by means of their supports in frontal position of alignment, being possible to reach a maximum diameter of 650mm. They also have a hydraulic motor in each roller, with adjustable revolving speed according to the diameter of the piece to be worked, to avoid the rollers and pieces to get damaged. This arrangement gives maximum advantage for manufacturing high strength pneumatic and hydraulic cylinders from hardened and tempered materials of high strength to give maximum durability. Tailstock is not prescribed for the purpose of manufacturing cylinders and hence not provided. Electric Board, all the auxiliary and power command elements are suited inside the board. This board is detachable and mounted on a foot. The doors are locked with lever to avoid any disturbance to process. Inside it, there are all the fuses for the command at the exit of the transformer, auxiliary contactors and timers for the command, a switch for the hydraulic group motor and an equipment to change the speed for the main motor. Piece Ejector is important and provided because of the characteristics of the work and the shape of the pieces to be made, it is necessary to use a piece ejector. Apart from the difficulty in removing the cylinder from the tooling because of the fixing and air effects, almost like creating vacuum, there is also the lack of time to do it by laborious and hard manual method. The axis of the ejector is directly moved by the hydraulic cylinder, commanded by valves connected to the machine. The maximum power of the ejectors cylinder is 150kn. Hydraulic Group is independent of the machine, is moved by a 18kw motor at 1500 rpm which moves the flow pump to operate the whole machine and all the accessories. There are also all the control and regulation elements for each movement. It includes a temperature thermostat station for the cooling system, in order to keep the oil temperature constantly at its ambient level.

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Cooling System is independent from the machine. It has a 2500 liter capacity and is moved by an motor pump of 7.7 kw at 1500 rpm, giving a 450l/min flow. It also contains a filter and a liquid cooling system to maintain the temperature at an ambient level. Inside the tank there is a removable plate with a filtering mesh to collect the metallic pieces that may fall from the work piece being made. Slides Greasing System works in conjunction with the hydraulic group at medium pressure which allows a wide range of greasing frequencies, with a perfect control of the right reception of the lubricant, in each part to be greased. Headstock Greasing System is also an independent group attached to the headstock, giving an oil volume of 5 l/min, distributed to the different bearings and gears with the corresponding proportions, which are delivered previously graded. It has the necessary filter elements, security valve and level cooling systems.

702 Tolstoy House, Tolstoy Marg, New Delhi 110001, INDIA
Phone: +91 (11) 2371-5517, Fax: +91 (11) 2371-2032
info@specialsteelco.com
Copyright 2005 Special Steel Company of India