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What are the characteristics of the Longmen high-speed punch press?
Release date:
2026-05-20
The Longmen high-speed punch press is characterized by high rigidity, high precision, high stability, and intelligent control.
The Longmen high-speed punch press is characterized by high rigidity, high precision, high stability, and intelligent control, as detailed below:
I. High-Rigidity, High-Precision Structure
Integral gantry‑type structure: Constructed from high‑strength cast iron or specialized alloy materials, it is formed via an integral casting process into a closed‑frame configuration. This design eliminates the deformation issues inherent in conventional open‑frame presses caused by the machine’s open body, maintaining structural stability even under full‑load operation and ensuring long‑term machining accuracy.
Multi‑guide‑pillar guiding system: Equipped with sophisticated guiding structures such as four‑guide‑pillar, eight‑guide‑pillar, or dual‑center‑pillar configurations, and paired with large‑area alloy‑copper or steel bushings, it achieves gapless guidance. For example, the eight‑guide‑pillar design combines four circular guide pillars, four circular slide‑block guide pillars, two circular auxiliary guide pillars, and a dual‑center pillar, reducing the force per unit area to an extremely low level. Even under eccentric loads of up to ±5 mm, it can still maintain stamping accuracy within ±0.01 mm.
High‑strength transmission components: Key parts such as the crankshaft and gears are forged from high‑alloy steel, subjected to heat treatment and precision grinding, achieving a surface hardness of HRC 58–62. This enhances fatigue resistance by more than threefold, ensuring wear resistance and dynamic balance even under high‑speed operation.
II. Outstanding Dynamic Performance
High-speed operation capability: With a short slide stroke (typically 20–40 mm) and a high cycle rate (200–700 strokes per minute), combined with high-frequency stamping technology, the single-stroke cycle time can be reduced to less than 0.1 seconds, significantly boosting production efficiency. For example, in the stamping of motor stators and rotors, up to 800–1,000 strokes per minute can be achieved.
Dynamic balancing system: By means of a counter‑rotating dynamic balancing device or an independent balancing system, the inertial forces generated by the high‑speed rotation of the crankshaft and slider are counteracted, keeping vibration amplitudes below 0.05 mm and reducing noise to below 75 dB, thereby ensuring a dead‑center repeatability of ≤ ±0.005 mm.
Forced Lubrication and Cooling: A fully enclosed forced lubrication system delivers lubricant to critical friction points such as guide posts, guide sleeves, and the crankshaft via an oil pump. Combined with an oil cooler that circulates and lowers the temperature, this effectively suppresses thermal deformation, ensuring precision and stability even under high-speed operation.
III. Intelligent Control and Automation Integration
Microcomputer Control System: Equipped with a human–machine interface (HMI) and PLC-based programming, it provides real-time display of punch press parameters such as angle, rotational speed, die height, and fault locations. It supports digital setting and storage of stamping parameters—including stroke, speed, and dwell time—offering convenient operation and robust traceability.
Automated Production Support: Leveraging technologies such as electronic cams and rotary encoders, the system enables synchronized coordination with feeders, levelers, robotic arms, and other equipment, supporting end-to-end automated production. For example, when paired with a high-speed roller feeder, it can achieve a feeding speed exceeding 10 meters per minute, reducing manual intervention and boosting efficiency by more than 30%.
Safety protection mechanisms: Integrated features include a two-hand control button, an intelligent emergency stop device, a light‑curtain safety system, and an overload protection device, ensuring the safety of both operators and equipment. For example, when the slide’s stroke deviates from normal or the load exceeds the rated capacity, the system automatically activates the brake to prevent equipment damage.
IV. Modular Design and Scalability
Standard features are extensive, including an electric motor‑driven mold‑height adjustment system, a mold‑height indicator with 0.01 mm accuracy, a hydraulic clamping system, and a separate control cabinet, meeting diverse production requirements. For example, the electric mold‑height adjustment uses a motor‑driven lead screw to fine‑tune the mold height, saving time and effort while delivering high precision.
Flexible configuration options: The machine supports optional upgrades such as air‑bag vibration‑isolating feet, bottom‑dead‑center detectors, mold‑illumination lights, and high‑speed roller feed systems, enabling it to adapt to a variety of process requirements. For example, the air‑bag vibration‑isolating feet use air springs to dampen vibrations, further enhancing machining stability.
A wide range of tonnage options is available: models are offered in 30‑ton, 45‑ton, 60‑ton, and 80‑ton capacities. Higher tonnage delivers greater machining accuracy and production efficiency, though at a correspondingly higher cost. Users can select the most suitable model based on the material thickness of their products, required punching force, and budget.
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