 |
Product Advantage
1. Generally used for D.E station, the popular size of the tooling is 5X80 and 5X100 in rectangle.
2. The stripping plate and the lower die are designed to close to clamp with relief, so that the material can be punched against the edge to maximize the use of the material.
3. The punch is a slitting design with insert and holder, made of high speed steel, to make the longest life of the punch with the lowest cost.
4. The lower die can also be designed as a slitting insert type.
5. The guide assembly is a quick-adjusting structure, which is convenient to extend or shorten the length of the tooling.
Thick Turret Close-To-Clamp (CTC) D & E Station assembly is a specialized punching component engineered to minimize the "dead zone" on a sheet of metal. In standard turret operations, a safety buffer is required to prevent the large-diameter D and E station guides from colliding with the hydraulic work-holders (clamps). CTC tooling is modified to bypass these restrictions.
Here is a technical description using original industry terminology:
1. Geometric Design & Offset Engineering
The defining characteristic of a CTC assembly is the radical relief or "cut-away" on the guide body and stripper plate.
*Relieved Profile: One side of the circular guide is precision-milled or flattened. This allows the center of the punch to move significantly closer to the clamp's edge than a standard 3.5" (D) or 4.5" (E) station tool would allow.
*Narrowed Stripper Footprint: The stripper plate is also notched or "scalloped" to match the guide's profile, ensuring that the clamping pressure of the stripper does not interfere with the clamp’s physical housing.
2. Structural Integrity & Guidance
Because the guide body is partially removed, the assembly must compensate for the loss of surface area:
*Asymmetrical Guidance: The internal punch-to-guide bearing surface is optimized on the non-relieved sides to ensure the punch remains perfectly perpendicular.
*Heavy-Duty Keying: Precision internal keyways are critical in CTC tools to ensure the "flat" side of the tool is always oriented toward the clamp. This prevents accidental turret rotation that could lead to a catastrophic crash.
3. Operational Advantages
*Reduced Sheet Scrap: By allowing the machine to punch within the standard "no-go" zone, manufacturers can nest parts much closer to the edge of the sheet, significantly increasing material utilization.
*Large Hole Capacity near Edges: Traditionally, only small A or B stations could get close to clamps. CTC D and E stations allow for large-scale slitting, large rectangular notches, or 4.5" holes to be placed near the sheet perimeter.
4. Key Considerations for Use
*Programming Logic: Using CTC tooling requires specific software parameters. The CNC controller must be aware that the tool is "relieved" so it can safely navigate the turret without triggering a "clamp dead-zone" alarm.
*Tonnage Limits: Because the guide body is relieved, some manufacturers recommend a slight reduction in maximum tonnage for CTC D/E stations compared to their full-bodied counterparts to prevent body deflection during heavy hits.
Close to clamp(MATE clamp clearing,AMADA sheet saver) D station Max.85mm
Close to clamp E station Max.110mm
Use this tool close to work holder clamps,The stripper and the die are relieved, so the clamp can pass between the upper andthe lower unit. No need to reposition the clamps, saves time, improves piece part quality. Stripper Die could be single relief or double relief.
