2. Tutorial: Engineering technology Topic: Pressed and plunger connections Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

3. Pressed and plunger connections

4.  Plunger connection  1. Disassembling  2. Not disassembling  Mostly from plastic or spring steel  For assembling is used material’s elasticity  One part MUST be plastic / elastic  These connections can be in shape of ‘hook’ ‘with protrusions’ or ‘rounded’.  Enable simple and quick connection of thin sheets, parts of nonmetal, (plastics, glass and ceramic materials )

5.  Plunger connection system / non disassemble able  Scope of using: Car assembly (coachwork) Electro technical industry Manufacturing of domestic goods / fastening of handles, cables, company’s symbols etc.

6.  Types of plunger connectors:

7.  Plunger connection of rounded shapes

8.  Plunger connections using member elements  Build in connection latch

9.  Pressed connection Press pincers  Cold press connection

10.  1. Cold pressed connections  Operation uses press.

11.  2. Contacts pressing by transversal shrinkage  Hot:  Into heated outer part an inner cold part is inserted.  Universal joint – Hot pressing-Pressing tool

12.  3. Pressing of joints - Transverse expansion is provided by sub-cooling of inner part- shaft  For cooling is used dry ice / solid CO2, up-to -79 deg. C / or liquid nitrogen up to -190 deg. C

14.  http://strojirenstvi- ucivo.blogspot.com/2011/04/2194- rychloupinaci-zapadkove-spoje.html http://strojirenstvi- ucivo.blogspot.com/2011/04/2194- rychloupinaci-zapadkove-spoje.html