BS ISO 20929:2018,Tools for pressing — Heel guidings in large stamping and forming dies.
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BS ISO 20929:2018 was developed on basis of Guideline VDI 3387 “Sliding elements in large stamping die”.
Heel guidings are used in medium and large stamping and forming dies for guiding the upper die towards the lower die.
The heel guidings offer a simple and affordable guidance system which is widely used in medium and large stamping and forming dies made from casting and steel plate in complement of round guiding pillars and bushes.
Heel guidings are designed to guide the upper and lower die to facilitate tool set-up and try out and to retain the clearance (bending or drawing gap) during the service life.
Unlike round guides, guiding plates can also absorb lateral shear forces, see also Figure 1.
BS ISO 20929:2018 specifies dimensions for heel guidings in large stamping and forming dies.
This standard also gives example applications and an example for ordering.
Example applications
If very large lateral forces are generated in the dies, it is advisable to provide a guide plate instead of heel guidings Heel guidings are ideal for securing upper and lower dies during transportation and thereby preventing accidents.
BS ISO 20929:2018 pdf  can be downloaded on www.freestandardsdownload.com.Enjoy it.

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