Punching Units to suit Round TubesPunching Units and Custom Built Machines for Punching Holes in Round Tubes



	‘Parsell’ + ‘Minni-Die’ - Manufacturers of Press Operated & Hydraulic Punching & Notching Units

	40 Trent South Industrial Park, Little Tennis St, Nottingham. Notts. NG2 4EQ. U. K.

	Tel: +44(0)115 941 9009 Fax: +44(0)115 950 3921 Mob : +44(0)7860 351 648

	Tools & machines for punching steel tubes, aluminium box sections, steel box section & fabricated tubular components

updated July/28/2008



	The illustrations on this page are included to show some of the many options available for punching round tubes. Generally, these types of units suit drawn steel or aluminium tube up to about 40mm diameter - and mostly for tubes of 16mm, 19mm, 20mm, 25mm, and 30mm diameters Tubes in this category are usually punched without a mandrel support inside the tube and the hole is usually right through both walls - but this can equally be one wall only. Because no mandrel is employed, the tube takes a ‘countersink’ effect due to the force of the punch as it pierces the tube. This can be minimised by grinding the end of the punch with a point, chisel, roof, or other shear angle
*above:* A punching unit to produce small holes in small diameter tubes without an inner support mandrel. Some deformation in the shape of a ‘countersink’ occurs - sometimes this is desirable.


			*above*: Examples of hydraulic punching units to pierce a round hole through both walls of 19mm diameter steel tube without the use of an inner support mandrel. The ‘countersink’ in this case is used to suit screw heads.



		These units all employ standard punches, die buttons and punch head parts from the ‘Minni-Die’ range of punching & notching units for presses - and further details of these products can be seen on our web site at www.parsellminni-die.com The hydraulic cylinders are all designed and manufactured by Parsell Minni-Die - single acting or double acting - especially for the rigours of punching and these can be seen on our website at www.hydraulicpunches.co.uk
*above:* A machine to produce end preparations in square, round and rectangular tube components recently completed for an office equipment manufacturer. Each of the tools is fitted with either a ‘mandrel die’ or ‘stump mandrel’ formed in the tool to prevent the ends of the tubes from deforming during punching.

The main advantage of this design approach for tube punching, centres on small compact tools that can easily be accommodated in bench set ups or on table format machines custom built to meet a certain part of your production cycle.

The machine format we utilise, especially with air-hydraulic intensifier operation - ensures that the machines are constantly ready for use for that part of your production cycle.

The machines are quiet in operation, perform at high speed with unskilled operators, and due to the designs of our tooling they do not need guarding. Sometimes extra daylight has to be provided to allow the component to be loaded into the tools and in these cases the units and machines would comply with all known safety regulations in the UK.




	*above*: The illustration depicts a special crimping tool which forms part of a multi-station work centre to produce aluminium components used in a boiler condenser product. The unit has three hydraulic cylinders to form a crimping operation on the ends of aluminium tube.


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