SizTech Expander / Shrinker

SizTech Expander / Shrinker

Advantages of our Expander-Shrinker-Combination

  • Complex profiles and shapes with high accuracy
  • Exotic materials can be formed and shaped without any machining
  • Optimize volume distribution and stress relief of the product
  • Measuring and calibrating of the inner or outer ring diameter during the automatic cycle (gauge mode)
  • A unique control system with a user-friendly interface that guarantees repeatability and accuracy
  • Additional advantage for the aerospace industry: Hot parts can be sized; the temperature of the product can be measured to calculate the expansion or reduction ratio to guarantee part diameter at room temperature
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Features of SizTech

  • SizTech understands the advantages of using both processes
  • SizTech can advise you which applications are possible and which are NOT possible to size
  • SizTech knows how to calculate and design the right expander – shrinker combination for your application.
  • Our unique design reduces the friction in the system.
  • SizTech offers a proven, reliable machine design that guarantees high efficiency, long lifetime and low maintenance costs.
  • SizTech designs and tests tooling; tooling shares the same profile as the part on the inside and on the outside, which needs to be produced and is one of the most important parts in the expander-shrinker
  • Quick change options for the tooling are available
  • SizTech can also supply automatic loading and unloading systems

The Expanding-Shrinking Process – when contoured transitional Areas are required

The expanding-shrinking process is an unique and economical means of forming a wide range of parts. For some applications, the principles of both expanding and shrinking are combined in a single machine. The center of such machine is an Expander. In principle, there are two methods to combine the processes:

  1. With an expander as the center of the machine and with a collapsible outer die, the outer die will have a predefined diameter and act as a compression tool. The part is then expanded into the outer die.
  2. With an expander as the center of the machine and a full shrinker around the expander, both the expander and shrinker can move to any given diameter.

This process is used for applications requiring the formation of localized embossments, beads, offsets, or other contoured transitional areas along the surface of the product.

Very complex curves or corrugations with high accuracy can be made. The process combines both motions so that the workpiece can be initially expanded and then shrunk. The cycle sequence can be reversed to provide shrinking first and then expanding.

This process can replace many other expensive forming processes.

Metal Forming technology – Expanding-Shrinking technology

We are experts for metal forming technology, especially for sizing and roll forming technologies. These are not so familiar within the industries we serve. We would like to change this as we believe in the benefits which include energy savings, machining reduction, quality, precision and more.

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