Editorial Technical Reference

CNC Press Brake

This page explains how CNC Press Brake is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A computer-controlled machine tool that bends sheet metal into precise angles and shapes using a punch and die system.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for CNC Press Brake

Definition
The CNC Press Brake is a core component within an Automated Metal Fabrication Cell System, responsible for the precise bending and forming of sheet metal components. It receives flat metal blanks from upstream processes such as laser cutting and, through programmed tool paths and force application, creates complex 3D geometries, angles, and forms essential for fabricating enclosures, brackets, chassis, and structural parts. Its integration into the automated cell is typically managed by a central control system for material handling, tool change coordination, and quality verification. The machine clamps a sheet metal workpiece between a matching punch (upper tool) and die (lower tool). A hydraulic or electric servo system drives the ram, forcing the punch into the workpiece and into the die cavity. The CNC system precisely controls the ram's position, speed, and tonnage based on material properties and desired bend angle, achieving high repeatability. Backgauge fingers position the workpiece accurately for sequential bends. The press brake is available in a range of capacities, with bending force from 100 to 2000 kN, bending length from 1000 to 6000 mm, and stroke length from 100 to 300 mm. Positioning accuracy and repeatability are specified as ±0.01–±0.05 mm and ±0.02–±0.05 mm respectively, per ISO 230-2. Bending angle accuracy is ±0.5–±1.0 degrees. Rated power ranges from 5.5 to 30 kW, with supply voltage of 380 V AC ±10% (three-phase, 50/60 Hz) per IEC 60038. Operating temperature is 5–40 °C, and protection class for electrical enclosures is IP54–IP65 per IEC 60529. Machine weight ranges from 3000 to 30000 kg, and footprint dimensions vary from 2500×1500×2200 mm to 8000×4000×3500 mm. Materials on file include high-strength steel for the frame and tungsten carbide for tooling inserts. These values are directory reference ranges; verify model-specific specifications with the legal manufacturer or supplier.
Working Principle
The CNC press brake operates by clamping a sheet metal workpiece between a punch and die. A hydraulic or electric servo system drives the ram downward, forcing the punch into the workpiece and into the die cavity, creating a bend. The CNC system controls the ram's position, speed, and force based on material properties and desired angle, ensuring repeatability. Backgauge fingers position the workpiece for sequential bends. The machine can perform air bending, bottoming, or coining depending on tooling and control settings.
Common Materials
High-Strength Steel, Tungsten Carbide (for tooling inserts)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Bending Force100–2000 kNSelect based on material thickness and length
Bending Length1000–6000 mmMaximum sheet length that can be bent
Stroke Length100–300 mmVertical travel of the ram
Positioning Accuracy±0.01–±0.05 mmBack gauge positioning accuracyISO 230-2
Repeatability±0.02–±0.05 mmConsistency of back gauge positioningISO 230-2
Bending Angle Accuracy±0.5–±1.0 °Angle deviation from set value
Rated Power5.5–30 kWMain motor power
Supply Voltage380 ±10% V ACThree-phase, 50/60 HzIEC 60038
Operating Temperature5–40 °CAmbient temperature for normal operation
Protection ClassIP54–IP65Dust and water protection for electrical enclosuresIEC 60529
Machine Weight3000–30000 kgDepends on capacity and length
Footprint (L×W×H)2500×1500×2200–8000×4000×3500 mmSpace required for installation

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Ram / Punch Holder
    The moving upper beam that holds the punch tool and applies the downward force to bend the metal.
    Material: Cast Steel
  • Bed / Die Holder
    The stationary lower beam that holds the die tool, providing the forming surface against which the metal is bent.
    Material: Cast Steel
  • Backgauge System
    A programmable positioning system with fingers that accurately locates the metal sheet for consistent bend placement.
    Material: Aluminum Alloy, Steel
  • CNC Controller
    The computer and interface that stores bending programs, calculates bend deductions, and controls all machine axes (ram, backgauge).
    Material: Electronics (various)
  • Hydraulic / Servo Drive System
    Drives the ram down and holds the programmed position and force.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 1000 tons (maximum bending force)
other spec: Sheet thickness: 0.5-25 mm, Bending length: 1000-6000 mm, Positioning accuracy: ±0.01 mm
temperature: Ambient to 50°C (operating environment)
Media Compatibility
✓ Mild steel sheets ✓ Stainless steel plates ✓ Aluminum alloys
Unsuitable: Abrasive or corrosive environments without protective coatings
Sizing Data Required
  • Maximum sheet thickness (mm)
  • Required bending length (mm)
  • Desired bending angle accuracy (degrees)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Hydraulic system leakage
Cause: Worn seals, damaged hoses, or loose fittings in the hydraulic circuit, often due to contamination, high pressure cycles, or improper maintenance
Back gauge positioning inaccuracy
Cause: Wear in ball screws, misalignment of linear guides, or encoder failure, typically from excessive loading, lack of lubrication, or environmental contamination
Maintenance Indicators
  • Unusual knocking or grinding noises during bending operations
  • Visible hydraulic fluid leaks around cylinders or connections
Engineering Tips
  • Implement regular hydraulic fluid analysis and filtration to prevent contamination-related failures
  • Establish a precision alignment and calibration schedule for the back gauge system and ram parallelism

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
CE Marking - Machinery Directive 2006/42/EC ANSI B11.3 - Power Press Brakes Safety Requirements

Quoted from the published standard.

Manufacturing Precision
  • Bending angle accuracy: +/-0.5°
  • Backgauge positioning repeatability: +/-0.01mm
Quality Inspection
  • Laser interferometer calibration for axis positioning
  • Load testing with strain gauges for frame deflection

Manufacturers of CNC Press Brake

6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Masion Sheet Metal Fabrication
Cixi, Zhejiang, CN
Founded 2007Over 400+ staff30,000 m3
ISO 16949
Listed on the company's own website · profile compiled by CNFX from public sources
Wuxi Shenchong Forging Machine Co., Ltd.
Wuxi, Jiangsu, CN
Founded 2002
Stated by the company · profile compiled by CNFX from public sources
Jiangsu Yawei Machine Tool Co., Ltd.
Yangzhou, Jiangsu, CN
Founded 1956over 2,000 staff500,000 m²
Stated by the company · profile compiled by CNFX from public sources
Anhui Harting Machinery Technology Co., Ltd.
Anhui, CN
Listed on the company's own website · profile compiled by CNFX from public sources
DurmaPress
Anhui, CN
Listed on the company's own website · profile compiled by CNFX from public sources
ZhongTie
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

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Frequently Asked Questions

What is the bending force range of a CNC press brake?

The bending force range is 100–2000 kN, selected based on material thickness and length. Verify the required force for your specific application with the manufacturer.

What materials are commonly used in CNC press brakes?

High-strength steel is used for the machine frame, and tungsten carbide is used for tooling inserts. These materials provide durability and wear resistance.

What is the positioning accuracy of the backgauge?

The backgauge positioning accuracy is ±0.01–±0.05 mm, and repeatability is ±0.02–±0.05 mm, per ISO 230-2. These values ensure precise bend placement.

What are the electrical requirements for a CNC press brake?

The supply voltage is 380 V AC ±10% (three-phase, 50/60 Hz) per IEC 60038. The rated power ranges from 5.5 to 30 kW. Confirm electrical compatibility with your facility.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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