Bed Frame for Bed/Die Systems: Structural Base, Parameters, and Verification

Product Specifications

Technical details and manufacturing context for Bed Frame

Definition

In the context of a Bed/Die system, the bed frame serves as the foundational structural component that supports the entire assembly. It provides a stable, rigid platform upon which other components such as the die, guides, and moving parts are mounted. The bed frame ensures proper alignment, absorbs operational forces and vibrations, and maintains dimensional stability during manufacturing processes. Its design minimizes deflection under load to ensure precision and repeatability in the manufacturing process. The bed frame is typically manufactured from cast iron or structural steel, with material grades such as HT250–HT350 for cast iron, and hardness values of HB 180–240. Key parameters include bed width (400–2000 mm), bed length (1000–6000 mm), load capacity (500–50000 kg), flatness (0.02–0.10 mm/m per ISO 230-2), parallelism (0.02–0.08 mm/m per ISO 230-2), operating temperature (-10 to 60 °C), vibration damping (0.5–0.8), weight (500–20000 kg), surface treatment (0.8–3.2 μm Ra per ISO 1302), and guideway type (H: hardened, P: plastic-lined per GB/T 17587). These values are reference ranges and must be verified for the specific model and application. The bed frame is a passive structural element; it does not move or perform active operations but provides the necessary rigidity and geometric reference for the active components. It is critical for machining accuracy and guideway alignment. When selecting a bed frame, consider the required workpiece size, load capacity, and precision requirements. Verify flatness and parallelism standards with the manufacturer. Maintenance signals include excessive vibration, wear on guideways, or loss of dimensional stability. Failure boundaries include exceeding load capacity or operating outside temperature limits, which may cause permanent deformation. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The bed frame functions as a passive structural element. It does not move or perform active operations but provides the necessary rigidity and geometric reference for the active components of the bed or die. Its design minimizes deflection under load to ensure precision and repeatability in the manufacturing process. The frame absorbs operational forces and vibrations, maintaining dimensional stability. It ensures proper alignment of mounted components such as dies, guides, and moving parts. The material and geometry are chosen to provide high stiffness and damping, with cast iron grades like HT250–HT350 offering good vibration absorption. The bed frame's flatness and parallelism are critical for machining accuracy, as they define the reference planes for the working components. Under load, the frame must resist bending and twisting to keep the tool and workpiece in correct relative position. The design also considers thermal effects, as temperature changes can cause expansion or contraction, affecting precision. The bed frame is typically bolted to a foundation or base, and its weight contributes to stability. Proper installation and leveling are essential to achieve the specified flatness and parallelism. The frame's surface treatment, such as scraping or coating, affects wear and sealing. The guideway type (hardened or plastic-lined) influences friction and wear characteristics. Overall, the bed frame provides the stable platform necessary for accurate and repeatable manufacturing operations.

Common Materials

Cast Iron, Structural Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bed Width	400–2000 mm	Determines maximum workpiece size
Bed Length	1000–6000 mm	Determines maximum workpiece length
Load Capacity	500–50000 kg	Maximum static load on bed
Flatness	0.02–0.10 mm/m	Critical for machining accuracyISO 230-2
Parallelism	0.02–0.08 mm/m	Ensures guideway alignmentISO 230-2
Material Grade	HT250–HT350	Cast iron grade for damping and strengthGB/T 9439
Hardness	HB 180–240	Indicates wear resistanceGB/T 9439
Operating Temperature	-10–60 °C	Beyond range may affect dimensional stability
Vibration Damping	0.5–0.8	Higher value reduces vibration amplitude
Weight	500–20000 kg	Affects shipping and installation
Surface Treatment	0.8–3.2 μm Ra	Smoother surface improves sealing and wearISO 1302
Guideway Type	H–P	H: hardened, P: plastic-linedGB/T 17587

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

Mounting Rails Part
Provide attachment points for other components and guide systems

Material: steel
Reinforcement Ribs Part
Increase structural rigidity and prevent deflection under load

Material: steel
Leveling Feet/Adjusters
Allow for precise leveling and alignment of the entire bed/die assembly

Material: steel
Frame Casting
The cast body itself — everything else bolts to it, and its flatness and parallelism are the reference the whole machine is built from.

Material: Cast iron (HT250–HT350)

Applied To / Applications

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

Bed / Die

View system integration details

Manufacturers of Bed Frame

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Frequently Asked Questions

What is the primary function of a bed frame?

The bed frame provides a rigid and stable structural base for a bed or die system. It supports and aligns other components such as dies, guides, and moving parts, absorbing operational forces and vibrations to maintain dimensional stability during manufacturing.

What materials are commonly used for bed frames?

Common materials include cast iron (grades such as HT250–HT350) and structural steel. Cast iron offers good vibration damping and wear resistance, while structural steel provides high strength and weldability. The choice depends on the application's load and precision requirements.

How do I verify the flatness and parallelism of a bed frame?

Flatness and parallelism are specified in mm/m and should be verified according to ISO 230-2. Use precision measuring instruments such as laser interferometers or electronic levels. Always confirm the actual values with the manufacturer or supplier for the specific model.

What are the typical load capacity ranges for bed frames?

Load capacity ranges from 500 to 50,000 kg, depending on the bed size and construction. The maximum static load must be considered to avoid overloading, which could cause permanent deformation or failure. Always check the manufacturer's specifications for the exact model.

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pressure:	Static load only (no dynamic pressure)
other spec:	Max static load capacity (kg), vibration tolerance (Hz)
temperature:	-10°C to +60°C

Bed Frame

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards