Editorial Technical Reference

Workpiece Fixture

This page explains how Workpiece Fixture is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical device used to securely hold and position a workpiece during manufacturing operations.

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

Product Specifications

Technical details and manufacturing context for Workpiece Fixture

Definition
A workpiece fixture is a critical component within industrial systems that provides precise, stable, and repeatable positioning of workpieces during machining, assembly, inspection, or other manufacturing processes. It ensures the workpiece remains stationary and properly oriented relative to tools or measurement devices, enabling accurate and efficient operations while maintaining safety standards. The fixture applies mechanical clamping forces through various mechanisms such as hydraulic, pneumatic, or manual systems to hold the workpiece against locating surfaces. These locating surfaces establish the reference position and orientation within the coordinate system of the industrial equipment. Adjustable elements accommodate different workpiece sizes and shapes while maintaining precise alignment. Typical materials include steel and aluminum alloy. Key parameters include clamping force (5–50 kN), clamping stroke (10–100 mm), repeatability (±0.01–±0.05 mm per ISO 230-2), operating temperature (-10 to 60 °C), operating pressure (0.4–0.8 MPa), material grade (40Cr per GB/T 3077), surface hardness (HRC 45–55 per ISO 6508), weight (5–50 kg), base dimensions (200×200 to 500×500 mm), and mounting interface (ISO 702-1). These values are reference ranges and must be verified for the specific model and application. The fixture is designed for use in machinery and equipment manufacturing, and its selection depends on workpiece size, required clamping force, and machine interface. Always confirm model-specific specifications and standards with the legal manufacturer or supplier before procurement or use.
Working Principle
The workpiece fixture operates by applying mechanical clamping forces through various mechanisms (such as hydraulic, pneumatic, or manual systems) to securely hold the workpiece against locating surfaces. These locating surfaces establish the reference position and orientation of the workpiece within the coordinate system of the industrial equipment. The fixture typically incorporates adjustable elements to accommodate different workpiece sizes and shapes while maintaining precise alignment. Clamping force is generated within a range of 5–50 kN, and the clamping stroke is 10–100 mm. The repeatability is ±0.01–±0.05 mm, ensuring consistent positioning. Operating pressure ranges from 0.4–0.8 MPa, and the fixture operates within -10 to 60 °C. The material is typically 40Cr alloy steel with a surface hardness of HRC 45–55. The base dimensions are 200×200 to 500×500 mm, and the mounting interface conforms to ISO 702-1. These parameters must be verified for the specific model.
Common Materials
Steel, Aluminum Alloy
Technical Parameters
ParameterTypical rangeNotes & selection driver
Clamping Force5–50 kNRequired to prevent workpiece movement during machining
Clamping Stroke10–100 mmDetermines workpiece size range
Repeatability±0.01–±0.05 mmCritical for consistent machining accuracyISO 230-2
Operating Temperature-10–60 °COutside range may affect sealing and material properties
Operating Pressure0.4–0.8 MPaBelow 0.4 MPa clamping force is insufficient
Material40CrHigh-strength alloy steel for durabilityGB/T 3077
Surface HardnessHRC 45–55Ensures wear resistanceISO 6508
Weight5–50 kgAffects handling and machine load
Base Dimensions200×200–500×500 mmMust fit machine table
Mounting InterfaceISO 702-1Compatible with standard machine spindlesISO 702-1

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
  • Base Plate Part
    Provides the foundation and mounting surface for all fixture components
    Material: Steel or Cast Iron
  • Locating Pins Part
    Establish precise reference points for workpiece positioning
    Material: Hardened Steel
  • Clamping Mechanism
    Applies force to secure the workpiece against locating surfaces
    Material: Steel with wear-resistant surfaces
  • Quick-Change Adapter Optional
    Enables rapid fixture changeover between different workpieces
    Material: Precision-machined Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Workpiece Fixture.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 500 psi
other spec: Workpiece weight capacity: 0.5 to 500 kg
temperature: -20°C to 150°C
Media Compatibility
✓ Metals (steel, aluminum, titanium) ✓ Plastics (ABS, polycarbonate, nylon) ✓ Composites (carbon fiber, fiberglass)
Unsuitable: Highly corrosive chemical baths (e.g., strong acids like hydrochloric or sulfuric acid)
Sizing Data Required
  • Workpiece dimensions (length, width, height)
  • Workpiece weight and center of gravity
  • Required clamping force and positioning accuracy

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Clamping Force Degradation
Cause: Wear in clamping mechanisms (e.g., worn jaws, hydraulic/pneumatic seal leaks), thermal expansion/contraction cycles, or material fatigue from repeated loading/unloading.
Misalignment or Positioning Drift
Cause: Accumulated debris on locating surfaces, loose fasteners/bushings, or structural deformation from over-torquing or impact loads.
Maintenance Indicators
  • Visible workpiece slippage or inconsistent machining results (e.g., out-of-tolerance dimensions)
  • Unusual noises (e.g., grinding, clicking) during clamping/unclamping cycles
Engineering Tips
  • Implement regular torque checks and alignment verification using precision instruments (e.g., dial indicators, laser alignment tools).
  • Establish a cleaning and lubrication schedule for moving parts, and use protective covers to minimize contamination from chips/coolants.

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
ANSI B5.54-2005 - Methods for performance evaluation of computer numerically controlled machining centers DIN 69893-1:2012 - Tool holders for machine tools - Shanks and receiving bores for tool holders with cylindrical shank

Quoted from the published standard.

Manufacturing Precision
  • Flatness: 0.05mm per 300mm
  • Bore diameter: H7 tolerance (+0.000mm/+0.025mm)
Quality Inspection
  • Coordinate Measuring Machine (CMM) verification of critical dimensions
  • Surface roughness measurement using profilometer

Manufacturers of Workpiece Fixture

Manufacturer profiles associated with Workpiece Fixture.

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Frequently Asked Questions

What is the typical clamping force range for a workpiece fixture?

The clamping force typically ranges from 5 to 50 kN, as listed in the reference parameters. However, the exact value depends on the specific model and application. Always verify with the manufacturer.

What standards apply to workpiece fixtures?

Relevant standards include ISO 230-2 for repeatability, GB/T 3077 for material grade, ISO 6508 for surface hardness, and ISO 702-1 for mounting interface. These are reference standards; compliance must be confirmed with the supplier.

How do I select the right workpiece fixture?

Consider workpiece size, required clamping force, operating environment, and machine interface. Use the reference parameters (e.g., clamping stroke, base dimensions) as a starting point, but verify with the manufacturer for your specific needs.

What maintenance is required for a workpiece fixture?

Regularly inspect clamping surfaces for wear, check hydraulic/pneumatic systems for leaks, and verify alignment. Follow the manufacturer's maintenance schedule. If repeatability degrades, recalibrate or replace worn parts.

Data Basis

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

Preliminary Technical Classification
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