D28 Welding Table CNC Machined Precision Hole Pattern The D28 Welding Table with CNC-machined precision hole pattern is a
heavy-duty, flexible welding fixture platform specifically designed
for welding engineering machinery components. Its core feature is
the high-precision array of Φ28mm standard holes achieved through
CNC machining. Combining high rigidity, high precision, modularity,
and rapid clamping capabilities, it is a core piece of equipment
for welding, assembly, and inspection of engineering machinery
structural components (such as booms, frames, cranes, and
outriggers). | Hole Diameter | Φ28mm, H7 tolerance (+0.021/0) |
Hole Spacing | 100×100mm (standard grid), ±0.03mm (heavy-duty version ±0.02mm) | | Hole Depth | Standard ≥30mm (customizable), depth tolerance ±0.05mm | | Hole Position Flatness | 0.08mm/1000mm, calibrated with a marble straight edge | | Surface Roughness | Ra3.2μm, precision grinding + nitriding / powder coating |
CNC Machining Core Processes - Raw Material Pre-treatment: Q355/QT600-3 ductile iron / thick steel
plate, stress relief annealing (to eliminate welding/casting
internal stress and prevent deformation after machining).
- CNC Rough Machining: Gantry machining center rough milling of the
table surface, drilling of pre-holes, leaving a 0.3-0.5mm finishing
allowance.
- Aging Treatment: Secondary aging treatment after rough machining to
further stabilize dimensions.
- CNC Fine Machining:
One-time clamping completes precision grinding of the table surface
+ precision boring of the hole system + grid line engraving,
avoiding errors from secondary clamping.
High-precision spindle (speed ≥8000rpm) + carbide boring tool are
used to ensure consistency of hole diameter/pitch.
3D simultaneous machining of side/end face hole systems to achieve
three-dimensional spatial positioning. - Inspection and Calibration: Coordinate Measuring Machine (CMM)
performs full inspection of hole position accuracy, flatness, and
perpendicularity, and issues an inspection report; non-conforming
products are reworked/scrapped.
- Surface Treatment: Electrostatic powder coating (C3) / QPQ
nitriding (HV600, C4) / nitriding + hot-dip galvanizing (C5M, for
coastal/desert environments), for rust prevention and wear
resistance.
Flexible procurement strategies - Standard Purchase: Single or multiple units available from stock.
Payment in full required before shipment. Standard models are
readily available in sufficient stock and can be shipped within 7
days.
- Customized Purchase: Customized according to customer's required
table size, thickness, precision, and surface treatment. Production
begins with a 30% deposit, with the remaining balance due before
container loading. Video inspection is supported, and shipment
will be arranged after confirmation of quality.
- Bulk Purchase: Tiered discounts available for orders of 5 units or
more (5 units - 8%, 10 units - 15%, 20 units or more - 20%). Credit
terms (30-60 days) are also available for long-term large
customers.
- Sample Purchase: Small-sized sample tables (e.g., 1000×2000mm) are
available for purchase. 300% prepayment is required, and delivery
will be within 15-25 days, allowing customers to test precision and
compatibility.
Contact Us Precision in every hole, excellence in every weld. With CNC precision machining at our core, we specialize in R&D
and manufacturing of D28 welding tables. Adhering to
millimeter-level precision and industrial-grade rigidity, we ensure
every hole array is perfectly aligned and every welding table is
built for heavy-duty intelligent manufacturing. From construction machinery to general heavy industry, we lay a
solid foundation for welding processes with cutting-edge technology
and empower global manufacturing with precision equipment. We join
hands with industry partners to forge a high-quality industrial
future through superior welding. |
