Anhui Sanxin Heavy Industry Machinery Manufacturing Co., Ltd.
SANXIN Sheet Metal Machinery Glossary

Glossary

English TermExplanation
1. Core Equipment Terms
Press BrakeA machine that bends sheet metal or plate by pressing the workpiece between an upper punch and a lower die.
CNC Press BrakeA press brake controlled by computer numerical control for programmable, precise, and repeatable bending operations.
NC Press BrakeA press brake using a simpler numerical controller for basic positioning and repeatable bend programs.
Hydraulic Press BrakeA press brake powered by hydraulic cylinders that move the ram and generate bending force.
Servo Press Brake / Electric Press BrakeA press brake driven mainly by servo motors and electric transmission systems instead of a conventional hydraulic ram drive.
Tandem Press BrakeTwo or more synchronized press brakes used together to bend exceptionally long workpieces.
Panel Bender / Bending CenterAn automated bending machine that positions and folds sheet edges through multiple programmed bends with minimal manual handling.
Shearing Machine / Plate ShearA machine that cuts sheet or plate by passing it between two blades.
Hydraulic Guillotine ShearA hydraulic shear whose upper blade moves in a guillotine-style path to produce straight cuts in sheet or plate.
Hydraulic Swing Beam ShearA hydraulic shear whose upper beam pivots in an arc around a fixed point during cutting.
V Grooving MachineA machine that cuts narrow V-shaped grooves in sheet metal to enable sharp, small-radius bends.
Vertical V Grooving MachineA V-grooving machine with a vertical working configuration designed for rigid clamping and precise groove machining.
Rolling Machine / Plate Rolling MachineA machine that forms flat plate into cylindrical, curved, or conical shapes by passing it through rotating rolls.
3-Roll Plate Rolling MachineA plate rolling machine that uses three rolls to bend plate into cylindrical or curved forms.
4-Roll Plate Rolling MachineA plate rolling machine that uses four rolls for secure plate clamping, accurate pre-bending, and efficient rolling.
Fiber Laser Cutting MachineA cutting machine that uses a fiber-delivered laser beam to cut metal sheet or plate with high speed and precision.
Tube / Pipe Laser Cutting MachineA laser cutting machine designed to cut holes, slots, contours, and profiles in round, square, or shaped tubing.
Tube Bending MachineA machine that forms tubes or pipes to a specified angle and radius without cutting them.
CNC Tube Bending MachineA computer-controlled tube bending machine that automatically manages feed length, rotation, and bend angle.
2. Bending Process and Machine Structure Terms
BendingThe process of plastically deforming a workpiece to create an angle, curve, or formed profile.
Air BendingA press brake method in which the punch does not fully contact the bottom of the die and the bend angle is controlled by penetration depth.
Bottom Bending / BottomingA bending method in which the sheet is pressed firmly into the die to obtain a more consistent angle with reduced springback.
CoiningA high-pressure bending method that compresses the material into the die cavity to produce a precise angle and very small springback.
Bending AngleThe included angle formed between two sections of material after bending.
Inside Bend RadiusThe radius measured on the inner surface of a bent part.
Outside Bend RadiusThe radius measured on the outer surface of a bent part.
Bending LineThe straight reference line along which a sheet or plate is intended to bend.
Bend AllowanceThe length of the neutral axis within a bend that is added when calculating the flat pattern.
Bend DeductionThe amount subtracted from the sum of flange lengths to determine the correct flat blank length.
K-factorA ratio used to locate the neutral axis through the material thickness during bend calculations.
SpringbackThe elastic recovery of material after the bending force is removed, causing the final angle to open or change.
Bending Force / TonnageThe force required to make a bend, commonly expressed in metric tons, kilonewtons, or tons-force.
CrowningA compensation method that offsets ram and bed deflection to keep the bend angle uniform across the full length.
Mechanical CrowningA crowning method that uses wedges or mechanical adjustment elements to compensate for machine deflection.
Hydraulic CrowningA crowning method that uses hydraulic pressure or cylinders to compensate for ram and bed deformation.
DeflectionThe elastic bending or displacement of the machine frame, ram, bed, tooling, or workpiece under load.
PunchThe upper press brake tool that pushes the workpiece into the lower die.
Die / V-dieThe lower press brake tool, often with a V-shaped opening, that supports and forms the workpiece.
Punch RadiusThe radius at the nose of the punch that influences the inside bend radius and surface condition.
V-opening / V-die WidthThe width of the V-shaped opening in the lower die, which affects bend radius, force, and accuracy.
ToolingThe collective term for punches, dies, holders, adapters, and other forming tools used on a machine.
Tool ClampingThe system used to secure press brake punches and dies in the correct position.
Segmented ToolingPress brake tooling divided into shorter sections so different bend lengths and box shapes can be produced.
Back GaugeA movable positioning system behind the tooling that locates the workpiece before each bend.
Axis (X, R, Z1, Z2, Y1, Y2 etc.)The controlled machine directions used to move the ram, back gauge, fingers, and other positioning components.
StrokeThe total travel distance of a moving machine component, such as a press brake ram.
Throat DepthThe horizontal distance from the machine frame to the bending line, which limits the depth of parts that can be formed.
DaylightThe maximum open distance between the upper and lower tooling when the ram is fully raised.
Working Table / BedThe rigid lower machine structure that supports the die and workpiece during bending.
3. Shearing and Cutting Terms
ShearingThe process of separating sheet or plate with opposing blades that create a controlled fracture.
Cutting LengthThe maximum width or length of material that a shearing or cutting machine can process in one operation.
Cutting ThicknessThe material thickness that a machine can cut under specified material and operating conditions.
Blade ClearanceThe controlled gap between upper and lower shear blades, adjusted according to material type and thickness.
Shear AngleThe angle formed by the shear blade relative to the workpiece, used to reduce peak cutting force.
Hold-down / ClampingA device that presses the workpiece firmly against the table before and during a cutting operation.
Back GaugeA rear positioning system on a shear that sets the distance from the blade to the cut line.
Stroke per MinuteThe number of complete cutting or ram cycles a machine can perform in one minute.
Fiber LaserA solid-state laser technology in which the beam is generated and delivered through optical fiber.
Laser PowerThe rated output power of a laser source, usually expressed in watts or kilowatts.
Cutting SpeedThe linear rate at which the cutting head or workpiece moves during a cutting operation.
Cutting KerfThe width of material removed by the cutting process.
PiercingThe initial operation that creates an entry hole so the laser can begin cutting a closed contour.
Assist GasA gas directed through the cutting nozzle to remove molten material, cool the cut, and influence edge quality.
NozzleA replaceable tip that directs assist gas and helps control the laser beam position at the cutting point.
Cutting HeadThe assembly containing focusing optics, sensors, protective windows, and the nozzle that delivers the laser to the workpiece.
Processing Area / Working AreaThe maximum sheet dimensions or machine envelope available for cutting or processing.
NestingThe arrangement of part shapes on a sheet to maximize material utilization and reduce scrap.
Rake AngleThe inclination of the upper shear blade along the cutting length, which reduces the instantaneous cutting load.
Ram StrokeThe vertical travel distance of the press brake ram during one cycle.
Positioning AccuracyThe closeness of a commanded machine position to the actual measured position.
RepeatabilityThe ability of a machine to return to the same position consistently over repeated cycles.
Plate RollingThe process of forming flat plate into cylinders, cones, arcs, or other curved shapes using rolls.
4. Plate Rolling and Tube Bending Terms
Pre-bendingThe forming of plate edges before the main rolling operation to minimize unbent flat sections.
Cone BendingThe rolling process used to produce conical or tapered cylindrical parts.
Top Roll / Upper RollThe upper roll that applies or controls bending pressure in a plate rolling machine.
Bottom Roll / Lower RollThe lower roll that supports and feeds the plate during rolling.
Side RollAn adjustable lateral roll used to guide, support, and bend the plate.
Roll DiameterThe outside diameter of a forming roll, which influences capacity and the minimum achievable curve.
Bending LengthThe maximum plate width that can be rolled or the effective working length of the machine rolls.
Minimum Bending DiameterThe smallest finished cylinder diameter the machine can produce under specified material and thickness conditions.
Tube BendingThe process of forming a tube or pipe to a specified angle and centerline radius.
MandrelAn internal support inserted into a tube during bending to reduce collapse, flattening, and wrinkling.
Wiper DieA tool positioned near the bend tangent to prevent wrinkles from forming on the inside of a tube bend.
Clamp DieA die that grips the tube and holds it against the bend die during rotary draw bending.
Bend RadiusThe specified radius of a bend, commonly measured from the bend center to the tube centerline.
OvalityThe degree to which a bent tube cross-section becomes out of round.
5. Control Systems and Automation Terms
CNC SystemThe integrated computer control platform that manages machine axes, programs, parameters, diagnostics, and automation functions.
NC ControllerA numerical control device used for simpler machine programming, position setting, and sequence control.
Delem / Cybelec / ESACommon brands of press brake control systems used for programming, axis control, and machine operation.
Touch Screen HMIA touch-sensitive human-machine interface used to enter programs, monitor status, and operate equipment.
ProgrammingThe process of entering dimensions, angles, sequences, speeds, and machine settings for an automated operation.
2D / 3D ProgrammingGraphical programming that uses two-dimensional or three-dimensional part models to create and verify machining or bending programs.
Offline ProgrammingThe creation and simulation of machine programs on a separate computer without occupying production equipment.
Servo MotorA motor with closed-loop feedback that provides precise control of position, speed, and torque.
Hydraulic SystemThe pumps, reservoirs, valves, cylinders, filters, and piping that generate and control hydraulic power.
Proportional ValveAn electrically controlled valve that varies hydraulic flow or pressure in proportion to an input signal.
EncoderA feedback device that measures rotary position, speed, or movement for closed-loop machine control.
Linear ScaleA precision linear measuring device that reports the actual position of a moving axis.
Bending SequenceThe planned order in which multiple bends are made to produce a part without interference or distortion.
Collision CheckA software or control function that detects potential contact between the part, tooling, machine, or back gauge before production.
Tool LibraryA stored database of punches, dies, dimensions, load limits, and tool setup information used by the controller.
Material LibraryA stored database of material properties, thicknesses, bend factors, and correction values used in programming.
Automatic Bending CellAn automated production unit combining a press brake with robotic handling, tooling, safety systems, and part flow equipment.
Robot IntegrationThe mechanical, electrical, and software connection of an industrial robot with a machine or production line.
Safety Light CurtainAn optoelectronic safety device that stops or prevents hazardous machine movement when its light beams are interrupted.
Safety Guard / FenceA physical barrier used to prevent unauthorized access to hazardous moving parts or automated work areas.
CE Safety StandardSafety requirements and conformity practices applied to machinery placed on the European market.
BackgaugeA rear positioning assembly that sets the workpiece depth before bending or shearing.
Crowning System (Hydraulic/Mechanical)A hydraulic or mechanical system that compensates for machine deflection to maintain a consistent bend along the workpiece.
Laser SourceThe component that generates the laser beam supplied to a laser cutting system.
Punch and DieThe matched upper and lower press brake tools that apply force and define the bend shape.
Clamping SystemA mechanism that securely holds tooling or the workpiece to prevent movement during processing.
CNC ControllerThe controller hardware and software used to program, coordinate, and monitor CNC machine operations.
Sheet MetalFlat metal stock with relatively small thickness compared with its length and width.
PlateFlat metal stock that is generally thicker and more rigid than sheet metal.
Mild SteelLow-carbon steel valued for good formability, weldability, availability, and relatively low cost.
6. Materials and Sheet Metal Terms
Stainless SteelSteel alloyed with chromium and other elements to provide corrosion resistance and durable surface properties.
Aluminum AlloyAluminum combined with other elements to improve strength, formability, corrosion resistance, or machinability.
Galvanized SteelSteel sheet or plate coated with zinc to improve corrosion resistance.
Material ThicknessThe measured distance between the two main surfaces of a sheet, plate, tube wall, or other material.
Yield StrengthThe stress at which a material begins to deform permanently.
Tensile StrengthThe maximum tensile stress a material can withstand before necking or fracture.
Grain DirectionThe orientation of the material's rolling structure, which can affect bend cracking, strength, and springback.
ElongationThe percentage increase in length a material can sustain before breaking, used as an indicator of ductility.
Sheet Metal FabricationThe manufacture of metal parts by cutting, bending, forming, joining, and finishing sheet material.
MetalworkingThe broad industrial practice of shaping, cutting, forming, machining, and joining metals.
Fabrication ShopA production facility equipped to cut, form, weld, and assemble metal components.
7. Application and Industry Terms
Job ShopA manufacturing business that produces custom, low-volume, or varied parts for different customers.
Batch ProductionThe production of a defined quantity of similar parts in repeated lots.
PrototypingThe creation of trial parts or early samples to evaluate design, fit, function, and manufacturability.
Decoration / Architectural MetalworkThe fabrication of metal elements used for decorative finishes, building features, façades, railings, and architectural structures.
HVAC DuctingSheet metal ducts and fittings used to distribute heating, ventilation, and air-conditioning airflow.
Automotive PartsComponents manufactured for vehicles, including structural, body, chassis, exhaust, enclosure, and support parts.
ShipbuildingThe construction and assembly of ships and marine structures using formed plate, profiles, and fabricated components.
Machinery ManufacturingThe production of industrial machines, frames, enclosures, components, and mechanical systems.
Aerospace ComponentsPrecision parts and structures manufactured for aircraft, spacecraft, propulsion, and related high-performance applications.
8. Pre-Sales, After-Sales, and Quality-Related Terms (Supporting ESG and Trust)
CommissioningThe installation, calibration, testing, and acceptance process that prepares new equipment for normal production.
TrainingInstruction provided to operators and maintenance personnel on safe use, programming, setup, and service procedures.
After-Sales ServiceTechnical support, maintenance, repair, spare-parts supply, and other assistance provided after equipment delivery.
WarrantyA supplier's defined commitment to repair or replace covered defects within a specified period and under stated conditions.
Spare PartsReplacement components kept available to restore or maintain equipment operation.
Preventive MaintenancePlanned inspection, lubrication, adjustment, and part replacement performed before failures occur.
TroubleshootingThe systematic process of identifying the cause of a fault and restoring normal machine operation.
DowntimeThe period during which equipment is unavailable for production because of failure, maintenance, setup, or other interruption.
OEM / ODMOEM refers to manufacturing products to another company's specification, while ODM includes product design and manufacturing services.
CE CertificationConfirmation that a product meets applicable European conformity requirements and may carry the CE marking when required.
ISO 9001 Quality ManagementAn internationally recognized quality management framework focused on consistent processes, customer requirements, and continual improvement.
ESGEnvironmental, social, and governance factors used to assess responsible business practices and long-term organizational performance.
Energy EfficiencyThe ability of a machine or process to deliver the required output while using less energy.
Environmental ComplianceAdherence to applicable environmental laws, permits, standards, and operational requirements.


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