Custom Metal Stamping in a Transfer Press
Trans-Matic has 120 different transfer presses with capacities ranging from 5-600 tons. This range enables us to match your part to the ideal tranfer press based on initial blank size, part length, number of stations required to deep draw the part, tonnage required, press speed (strokes per minute), machine energy, and auxiliary equipment capabilities. Producing parts in a transfer press enables greater length-to-diameter ratios and often utilizes less material, making your parts more cost effective.
Trans-Matic offers deep drawn metal stampings utilizing state of the art transfer press technology to maximize efficiency. We match each deep drawn component with the ideal manufacturing process to give our customers the highest quality deep drawn parts at the lowest cost.
Contact Trans-Matic for more information on our transfer press capabilities.
About Transfer Press Stamping
A transfer press is typically used in metal stamping to form components that have a cupped shape. A typical cup-shaped part manufactured using a transfer press has a length-to-diameter ratio of 1:1 or greater. During transfer press stamping, coil sheet material is fed into a press where a blank is created by cutting the material from a coil strip.
This blank is then pushed, or transferred, to the next station where the rough cup is created. Typical blank diameter to cup diameter reduction is 40%. The cup is then transferred by mechanical fingers to one or more subsequent draw stations where diameter reductions continue at an approximately 20% rate until the rough, final shape has been created. The part is then transferred into additional stations that are used to establish critical diameters and lengths, steps, features, and forms.
Additional stations may also be required for features such as side piercing, bottom piercing, beading, bulging, coining, curling, extruding, ironing / wall thinning, necking, notching, rib forming, stamping / marking, threading, and leak testing. For more information on additional in-press stations, read about our deep drawing process.
Transfer Press vs. Progressive Die Press
One of the key differences between creating metal stampings on a transfer press versus a progressive die press is the creation of the blank (relieving the material from the coil strip). Progressive die presses are mainly used for stampings where the length to diameter ratio is low and part side features are not required.
In general, a progressive die press is best for bending, cutting and piercing. Due to the relieving of the material, a transfer press will allow the material to flow between the punch and die, thus allow for greater length to diameter ratios.
A transfer press allows more flexibility to present the part to the tooling, making it a better option for parts that require special features. Finally, in most cases, a transfer press utilizes less material than a progressive die press because a carry web is not required to produce the part.
Transfer Press Types
Transfer presses come in several forms from renowned press builders such as Aida, Chin Fong, Komatsu, Manzoni Minster, Osawa, Platarg, Seyi, and US Baird, among others.
There are two main types of transfer press: ICOP, or individually cam operated plunger presses, and solid bed “dieset” style presses. The motion of an ICOP transfer press is much the same as that of a gasoline engine. A rotating shaft with cam lobes drives the movement of each press station individually. A dieset transfer press has a solid flat surface that creates the press motion and activates all press stations at the same time.
Transfer presses come in various sizes with various capabilities. Matching the right press to the part being formed is critical. Factors that must be considered when determining the right transfer press include blank size, part length, number of stations required, tonnage required, press speed (strokes per minute), machine energy, and auxiliary equipment capability. Trans-Matic has a wide range of transfer press capabilities that allow us to match the optimum press to your part.