Application

Fitting a part that looks small and weighs a hundred and fifty kilograms

A transformer deceives. It is barely bigger than a moving box and weighs five times as much – and setting it into a housing leaves so little room all round that fingers no longer fit between.

Component
Transformer, choke, converter module
Weight
40 to 250 kg
Movement
lift, guide, lower vertically
Accuracy
hole pattern in millimetres
Frequency
10 to 60 a shift
Note
offset centre of gravity, high density
01 — The task

Compact is not light. Compact is only small.

Take the transformer off the pallet, guide it to the assembly station, position it over the mount and lower it. The centre of gravity is rarely central – winding, terminal box and core shift it. By hand it is lifted in pairs, and the last centimetres are guessed: the view of the contact points is blocked by the part itself. Crushing risk to the hands is the rule here, not the exception.

02 — The solution

How we solve it

The suspension point moves with the type

If the pick-up point does not sit above the centre of gravity, the part tilts until the two align – and while lowering into a tight housing that is exactly the moment it strikes. So the mount gets a sliding pick-up point with labelled detents. For each type the setting is determined once; changing over then takes seconds.

Carried by the core, not the attachments

Gripping is at the core stack or the provided pick-up points, not at the terminal box, terminal strip or winding – those carry nothing and take damage. A positive mount reaching under the core stack or entering pick-up holes holds securely and leaves the delicate parts free. With changing designs we use adjustable supports rather than several grippers.

Lowering without sight

The contact points are hidden at the decisive moment. So alignment happens while sight remains, and lowering is then vertical: a device with a guided lift axis holds the angle while the hands only guide lightly. Stops and end positions on the mount preset the position – the last centimetres are then no longer guesswork, and fingers stay out of the crush zone.

03 — What changes

At the workstation afterwards

  • Fitting works with one person instead of two.
  • The offset centre of gravity is handled by a latched setting.
  • Terminal box and winding stay unloaded.
  • Fingers stay out of the gap between part and housing.
  • The part stays level while being lowered.
Frequently asked questions

Frequently asked questions

How is the offset centre of gravity handled?

By a pick-up point sliding in the mount with detents. For each type the setting is determined once and labelled; changing over then takes seconds. That is markedly faster and safer than experimenting anew with every part.

Balancer or rigid arm?

Rigid arm. The part is lowered into a tight mount and guided in the process – a balancer would swing out at the moment of contact. For plain transport from the pallet the balancer would be right, for fitting it is not.

Does this work for parts above 250 kilograms?

Yes, then usually via a rail system with higher capacity rather than a pillar jib. The kinematics stay the same; what changes is sizing, anchoring and how the part reaches the station at all.

Contact

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