JE21 Series Model D Press for Precision Copper Busbar Punching

The JE21 Series Model D open back press with fixed table and adjustable stroke is engineered to meet the stringent requirements of copper busbar fabrication for electrical switchgear systems. Built from high-tensile cast iron with stress-relieved processing, the frame provides exceptional rigidity during heavy punching cycles, minimizing deformation and ensuring consistent hole-to-hole accuracy.

The fixed table design enhances die alignment stability, while the open back configuration allows efficient loading and unloading of long copper stock without obstruction. This is critical in busbar manufacturing, where lengths often exceed 2 meters and must maintain ±0.05 mm positional tolerance.

An adjustable stroke mechanism enables operators to fine-tune ram travel between shallow and deep punching operations, optimizing cycle time for varying busbar thicknesses (typically 3–12 mm). The worm gear stroke adjustment allows 0.1 mm incremental settings, ensuring minimal wear on tooling by avoiding overtravel.

The slide runs on high-precision six-point gibs with forced lubrication via an automatic centralized oil pump, reducing thermal buildup during continuous runs. This is particularly important for copper processing, where heat expansion can cause dimensional drift.

Power is delivered through a dynamically balanced flywheel coupled with a dry clutch and brake assembly, achieving stroke speeds up to 70 spm without accuracy loss. The clutch engagement is electronically controlled for precise start/stop sequences, preventing double hits and misfeeds in high-speed operations.

Overload protection is integrated through a hydraulic release system, safeguarding both tooling and the press in the event of abnormal force spikes—common when punching laminated or coated copper busbars. The bed and slide surfaces are precision ground to maintain die parallelism, ensuring uniform punch penetration and clean shearing edges.

The machine supports quick die changes through a front-access mounting system, reducing downtime during model transitions. This is advantageous in switchgear manufacturing where busbar layouts differ between panel types. With a noise level maintained under 85 dB(A) and ergonomic control positioning, the JE21 Series Model D is operator-friendly even in high-volume environments.

FAQ – People Also Ask

Q1: How does a fixed table improve busbar punching accuracy?
A fixed table prevents minor vertical shifts during operation, maintaining die alignment and producing consistently accurate punch locations.

Q2: Can the JE21 handle laminated copper busbars?
Yes, with the right tooling and stroke settings, it can punch through laminated busbars while minimizing burrs and avoiding delamination.

Q3: What is the maximum copper thickness the press can handle?
It supports copper sheets up to 12 mm thick, with stroke adjustments to optimize penetration and prevent excessive tool wear.

Q4: How is thermal distortion managed in long production runs?
Centralized lubrication and precision-machined sliding surfaces minimize frictional heat, maintaining dimensional accuracy.

Q5: Is the press suitable for automated feeding systems?
Yes, its open back frame accommodates both manual and automated feeding of long copper strips, improving throughput efficiency.

Looking for a reliable JE21 Series Model D Press? Contact us today to explore our extensive range of Precision Lathe Reliable Pergormance and find the perfect solution for your production needs.

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