GUIDE PLATE TOOL

GUIDE PLATE TOOL

Simplest among press tool.

Preferred:
When component shape is simple.
Accuracy is less.
Fewer components are required.

Guide plate tool is categorized in to two types
Open guide plate tool
Stripper guide plate tool

Elements of a Guide Plate Tool:

1. Top plate.
2. Bottom plate.
3. Die.
4. Punch.
5. Punch Holder.
6. Thrust plate ( Back plate ).
7. Stripper or guide plate.

Punch and Die:

• These are the basic elements of Blanking tool.
• Made out of good quality alloy steel.
• Hardened and tempered to 58-62HRC.

Stripper:-

• The plate which does not allow the strip to go along with the punch.
• Stock strip is guided and fed in line with the profile, thus maintaining scrap equally.
• It aligns punch with the die in case the stripper also functions as a guide plate.
• Made out of Mild steel , Medium carbon steel.
• Hardened up to 45-50HRC.

Thrust plate

• Observes the upward thrust of the punch.
• Prevents from digging into the punch holder.
• Hardened up to 45-48HRC.

Top plate:

• Punch assembly is mounted on this plate.
• Tool shank is also screwed into this plate.
• Made out of mild steel or cast iron.
• Should be thick enough to prevent bending.

Punch holder:-

• Punch is fixed with a light press fit in punch holder.
• Punch holder ensures the position of the punch. In case of profiled punches fitted on the face of the punch holder, dowels are fixed to prevent rotation.

Shank:-

• Locates and clamps the tool to the press ram.
• Diameter of shank depends upon the Dia of bore in the press ram.
• Shanks are standardized to suit different presses.

Screws and Dowels:-

• Screws are used to hold the die parts.
• Dowels are used to align the die parts.

Bottom plate:-

• Gives cushioning effect to the die.
• Opening in the Base plate allows the blank or slug to fall clear of the tool.
• Made out of mild steel or cast iron.