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AM reduces production steps, lead time and cost

E-Box - traditional and new

Additively Manufactured ‘donor part’ made in titanium prior to machining (left) and AM part post machining (right)







The Brief:
Hittech Group BV is a group of companies supplying services in system integration, casting and sub-contract manufacturing for other companies.  In order to offer a more complete service portfolio to their customers Hittech and 3T formed a strategic alliance, to work on a range of projects.  This alliance enables Hittech to offer its customers the benefits of Additive Manufacturing. In return, it allows 3T access to Hittech’s world class design and ‘value engineering’ expertise and high-end volume production machining and finishing capabilities.

For the part shown here, Hittech produces an enclosure for electronic components that requires complex internal channels in the walls of the box for cooling these system components.  Additionally, the environment for the electronics within the box is maintained with air cooling which flows from the walls of the box over the internal components.

In order to manufacture the complex internal cooling channels and other features of the box using conventional methods, there were 38 steps in the manufacturing process chain, including milling out the channels and then bonding on the outer skins to complete the exterior walls of the box itself.

Hence through 3T, Hittech identified an opportunity to change the method of production of the enclosure in order to reduce the number of steps in the process, and improve the overall manufacturing yield.

Conventionally manufactured e-box

Schematic for conventionally manufactured box








The Solution:
In conjunction with 3T, Hittech redesigned the electronics box to allow for additive manufacturing thus enabling the part to be made in one piece. All the blind holes have been eliminated, and the 90° cross drilled channels have been changed to be smooth flowing channels. This has also had the effect of vastly improving the efficiency of the device.

Additively Manufactured e-box

Schematic for Additively Manufactured E-box








The Result:
Producing the new “E-Box” via additive manufacturing has resulted in a reduction in the number of production steps from 38 to 9, and lead time has been reduced from 20 weeks to 5 weeks. Additionally, the cost of the component has reduced by more than 30%. A key objective of the redesign was to reduce the yield loss during manufacture which has been reduced to almost zero.

Related links:
Hittech Group

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