Views: 0 Author: Site Editor Publish Time: 2026-03-06 Origin: Site
CLUSTER TOOL FOR THICK TURRET AND TRUMPF PUNCH PRESS
A Cluster Tool is a specialized punch press tool designed to punch multiple holes of the same shape and size simultaneously with a single stroke. Instead of hitting one hole at a time (which is slow and causes sheet distortion), a cluster tool acts like a "stamp" to increase productivity exponentially.
Here is a detailed breakdown of how they function in Thick Turret (Amada-style) and Trumpf systems.
1. Types of Cluster Inserts
*Solid Type Insert
The entire punch head and the multiple "pins" are machined from a single piece of tool steel.
Pros: Extremely rigid and precise; no risk of individual pins coming loose.
Cons: If one pin breaks or wears down, the entire tool must be replaced or reground, which is expensive.
*Replaceable Insert
Individual punch pins are seated into a carrier or holder.
Pros: Highly cost-effective. If one pin chips, you only replace that specific insert rather than the whole tool.
Cons: Requires assembly and ensuring all pins are seated at the exact same height.
2. Insert Shapes & Geometry
*T-Shape (Threaded or Headed)
These inserts have a "T" cross-section. The "head" of the T prevents the punch from being pulled out of the holder during the stripping cycle (when the tool retracts from the metal).
*Shoulder Shape
Common in heavy-duty applications. The punch has a thicker body (the shoulder) that tapers down to the cutting size. This design provides maximum strength and prevents the punch from flexing or bowing under high pressure.
3. Guiding Systems: Fully Guided Type
In a Fully Guided cluster tool, the stripper plate (the part that holds the metal down) has holes that match the punch pins perfectly.
Function: The stripper supports the pins right down to the surface of the material.
Benefit: This prevents "slug pulling" and ensures the pins don't deflect, which is critical when punching small holes in thick material or when using very high speeds.
4. Station, Size, and Punch Force
| Feature | Thick Turret (Amada Style) | Trumpf Style |
| Stations | Usually fit into B (1-1/4"), C (2"), or D (3-1/2") stations. | Fits into Standard Size 1 or Size 2 tool holders. |
| Punch Force | Total Force = (Perimeter of 1 hole × Thickness × Shear Strength) × Number of Holes. | Similar calculation; Trumpf machines often handle high-tonnage clusters well due to hydraulic ram control. |
| Limitations | You must ensure the total tonnage doesn't exceed the station or machine limit. | Since Trumpf tools rotate (360°), the cluster orientation is highly flexible. |
5. Function & Usage
Perforating: Creating grilles, speaker holes, or ventilation screens.
Efficiency: Punching 10 holes in 1 hit is 10x faster than 10 hits with a single punch. It also reduces wear and tear on the machine's RAM.
Material: Used on everything from thin aluminum to stainless steel, though the number of pins must be reduced for harder materials.
6. Critical Notes & Best Practices
Tonnage Calculation: Never guess. If you have 20 pins in a cluster, the machine hits with 20x the force. Exceeding the machine's capacity can damage the drive motor or the turret.
Sharpening: When sharpening cluster tools, all pins must be ground to the exact same length. If one is shorter, it won't penetrate the material, leaving a "half-punched" hole.
Lubrication: Use plenty of oil. Cluster tools generate significant heat because they move a lot of metal at once.
Slug Clearance: Ensure the die (the bottom part) has proper clearance. If slugs get stuck in a cluster die, it can cause a "double-hit" that will shatter the punch pins.
