Custom Steel Machine Beds & Heavy Bases
Openex manufactures custom welded steel machine beds and heavy equipment bases for industrial machinery and machine-tool OEMs. Manufacturing integrates structural welding, post-weld stress relief where specified, large-scale CNC planer milling, and dimensional inspection in a coordinated production sequence.
Machine beds form the structural foundation of CNC gantry mills, heavy lathes, machining centers, and industrial presses. Their rigidity, mounting-surface accuracy, and long-term dimensional stability directly influence machine alignment and operating performance. Openex produces these components as heavy steel weldments, providing design flexibility beyond traditional cast constructions.
Components weighing up to 250 metric tons can be manufactured within a stated machining envelope of 25,000 × 6,000 × 5,000 mm. The production sequence—from plate preparation and welding through stress relief, precision machining, and final inspection—is coordinated under one project responsibility. Actual project limits are confirmed through engineering and manufacturing review.
25 m
Maximum machining length
250 t
Maximum component weight
PWHT
Thermal stress relief where specified
4 Stages
Fabrication to final inspection
Manufacturing Specifications
The following figures represent Openex’s stated manufacturing and machining capabilities. Final project limits and achievable tolerances are confirmed during engineering review of the drawings, geometry, material, and inspection requirements.
| Specification | Capability |
|---|---|
| Maximum Machining Envelope | 25,000 mm (L) × 6,000 mm (W) × 5,000 mm (H) |
| Maximum Component Weight | Up to 250 metric tons |
| Materials | Carbon and structural steels including A36, Q235, Q345, and S355 |
| Fabrication | Plate preparation, cutting, fit-up, structural welding, and reinforced weldment assembly |
| Stress Relief | Post-weld thermal stress relief according to material, engineering, and process requirements |
| Precision Machining | CNC gantry and planer milling of guideway surfaces, mounting pads, bearing interfaces, and T-slots |
| Inspection & Metrology | Laser tracker, large-scale CMM, and weld NDT as specified by the project |
Machine Bed and Base Configurations
Components are manufactured to customer drawings and CAD models for a range of machine-tool and industrial applications:
- CNC gantry machine beds — Structural bases supporting gantry systems, linear guideways, and precision moving assemblies.
- Heavy-duty lathe beds — Long machine bases for turning equipment, including mounting interfaces and structural reinforcement.
- Machining center bases — Welded structures for vertical, horizontal, and multi-axis machining equipment.
- Press and forming machine bases — Heavy structural foundations designed for high operational loads.
- Custom machine frames — Fabricated structures and integrated bases produced to OEM specifications.
Fabrication and Machining Examples
Process Control for Dimensional Stability
Residual stress and dimensional movement must be considered throughout fabrication, heat treatment, and machining—particularly on components with long guideway surfaces or multiple precision interfaces. Openex plans the manufacturing sequence according to geometry, material, welding requirements, and drawing tolerances.
Drawings are reviewed for plate thickness, reinforcement layout, weld access, machining allowances, and handling requirements. Plates are prepared, positioned, and welded according to the approved manufacturing plan. Internal ribs and cross-members provide structural support and contribute to vibration control.
Where specified by the material, engineering requirements, and approved manufacturing procedure, residual stresses introduced during welding are reduced through controlled thermal stress relief. Temperature, holding time, and cooling conditions are established according to material grade, section thickness, and applicable process requirements.
Fabricated structures are machined on heavy CNC gantry and planer milling centers. Operations include milling of guideway mounting surfaces, mounting pads, bearing interfaces, and T-slots. Machining allowances and staged operations are applied to achieve the specified geometry.
Critical dimensions and machined interfaces are verified against the approved drawings and inspection plan. Measurement methods include laser tracker and large-scale CMM as required by component size and tolerance. Weld inspection and non-destructive testing are performed according to project specifications.
Typical Applications
Openex supplies custom machine beds and bases to OEMs producing:
- Large CNC gantry milling machines and machining centers
- Heavy-duty CNC turning and boring machines
- Industrial presses and metal-forming equipment
- Automated production and assembly machinery
- Special-purpose industrial machines and heavy equipment
Information Required for Quotation
To assess manufacturability, machining scope, and project cost, the following information should be provided:
- 2D engineering drawings and 3D CAD models (STEP or equivalent preferred)
- Material grade, plate thickness, and certification requirements
- Overall dimensions, estimated weight, and handling considerations
- Critical dimensions, flatness, parallelism, and guideway tolerances
- Welding standards, NDT requirements, and heat-treatment specifications
- Machining scope, surface-finish requirements, and inspection documentation
- Quantity, delivery schedule, and destination
Preliminary drawings may be submitted for an initial manufacturing review prior to formal quotation.
Request a Machine Bed Manufacturing Assessment
Submit machine bed drawings, CAD models, and project requirements. Openex can review dimensions, material, welding scope, stress-relief requirements, machining interfaces, and inspection criteria as part of the manufacturing assessment.
Submit RFQFrequently Asked Questions
Does Openex manufacture large welded steel CNC machine beds?
Yes. Openex manufactures custom welded steel machine beds and bases for industrial machinery and machine-tool OEMs. Scope includes steel preparation, structural welding, post-weld stress relief where specified, large-scale CNC machining, and dimensional inspection.
What is the maximum size of machine bed Openex can manufacture?
The stated machining envelope is 25,000 mm (L) × 6,000 mm (W) × 5,000 mm (H). Actual project limits depend on component design, weight, handling requirements, and production scope.
Can Openex machine linear guideway mounting surfaces?
Yes. Machining includes linear guideway mounting surfaces, mounting pads, T-slots, bearing interfaces, and other precision features according to drawing requirements.
How does Openex control distortion in welded machine beds?
Distortion control includes structural review, welding sequence planning, controlled welding procedures, post-weld stress relief where specified, machining allowances, staged machining, and dimensional inspection. The manufacturing sequence is determined by material, geometry, and tolerance requirements.
What information is required for quotation?
Provide 2D drawings, 3D CAD models, material specifications, dimensions, estimated weight, critical tolerances, inspection requirements, quantity, and delivery schedule. Preliminary drawings are accepted for initial review.