You are here: Riveting Process and Equipment Selection for Charging Piles, Distribution Cabinets & PV-Inverter Housings - BISUDI
Power-electronics equipment such as charging piles, distribution cabinets, PV inverters and energy-storage converters mostly have sheet-metal housings and are used outdoors or semi-outdoors, so their requirements for corrosion protection, sealing and joining reliability exceed those of ordinary indoor cabinets. Riveting (blind rivets + rivet nuts) is one of the main mechanical joining methods for such products, and process details directly affect the protection rating and long-term reliability.
I. Joining requirements for outdoor power equipment
First, corrosion resistance: outdoor temperature swings, rain and salt spray require fastener-to-sheet material matching, commonly stainless rivets/nuts or Dacromet/zinc plating; second, sealing protection: doors and covers must meet the IP protection rating, and threaded holes needing sealing should prefer blind (closed-end) rivet nuts; third, reliable electrical connection: grounding parts, busbar brackets and device-mounting beams bear device weight and vibration and must not loosen; fourth, post-paint assembly: cabinets are riveted after powder coating, and the coating must not be damaged.
II. Typical areas and fastener choice
| Area | Joining Content | Fastener Recommendation |
|---|---|---|
| Door/hinge/lock rod | Frequent opening, anti-vibration | Stainless blind rivets, structural type for load-bearing points |
| Device mounting plate/beam | Fixing breakers, modules, terminal blocks | Hexagonal or knurled rivet nuts, anti-rotation and torsion-resistant |
| Waterproof cover/base | Needs sealing against liquid ingress | Blind closed-end rivet nuts + sealing washers |
| Grounding parts | Grounding continuity, anti-loosening | Anti-loosening rivets/nuts ensuring conductive mating faces |
| Heat sink/outer cover | Thin wall, appearance face | Countersunk rivets/nuts kept flush |
III. Process points
First, choose through-hole vs blind hole by area: ordinary internal threads can use the through-hole type, while waterproof areas must use the blind closed-end type; for the operating difference seeOperating Points for Through-Hole and Blind-Hole Rivet Nuts; second, strictly follow the spec table for pre-holes, matching hexagonal nuts with hexagonal holes - over-tolerance hole diameter is the main cause of nut spinning and water seepage; third, when riveting after powder coating, remove coating at grounding areas or use grounding pierce washers to ensure grounding continuity; fourth, do waterproof verification on the first article at sealing areas; fifth, stainless fasteners harden markedly during processing, so equipment pulling force and lead screws must be configured by spec. For the fastener-type comparison seeCylindrical, Hexagonal, Through-Hole and Blind-Hole Type Comparison。
IV. Equipment-selection advice
Power cabinets are large, heavy and hard to flip, so lines center onhandheld auto-feed equipment: automatic riveting machines handle frame and door rivets while automatic rivet nut tools handle mounting-plate threaded holes; workers operate around the cabinet, with nails/nuts auto-fed through the tube to the gun head. Fixed special machines suit batch processing of regular flat parts such as doors and mounting plates; robotic cells suit very high-volume standard cabinets. Charging-pile and distribution-cabinet companies nationwide can book the manufacturer to bring machines on-site and sample on real cabinets.
Power-Equipment Riveting FAQ
Power Industry FAQ
Generally choose stainless rivets or Dacromet-treated rivets; coastal or high-humidity environments prefer stainless, minding electrochemical compatibility with aluminum panels.
Use blind closed-end rivet nuts with sealing washers for waterproof threaded holes, do water-spray/air-tightness verification on the first article, and sample at intervals within batches.
Powder-coated faces must conduct at grounding points - use pierce washers or reserve conductive areas before riveting, and perform grounding-resistance tests per electrical norms.
Switch specs by changing lead screws, riveting heads and channels; mark well and confirm the first article, and multi-spec stations are advised to manage spec-divided material boxes.
Yes; choose the spec by plate thickness, use small-spec nuts on thin sheets with controlled pulling force, and send sample sheets for trial riveting first.
Charging-Pile/Distribution-Cabinet Riveting Process Assessment
Solutions are provided by cabinet material, protection rating and fastener spec, with nationwide on-site trials; consultation hotline +86 13556668682.
V. Implementation advice for power-equipment companies
We recommend a three-step rollout: step one, pilot on one main outdoor cabinet model and sort out the fastener solutions for the three area types (doors, mounting plates, waterproof covers) at once, mapping which points use stainless rivets, hexagonal rivet nuts and blind nuts, to form a process standard; step two, complete three verifications at the first-article stage - thread go/no-go and pull-out tests, water-spray verification of waterproof areas, and grounding-continuity tests - and write results into work instructions; step three, configure equipment and spares, using handheld auto-feed riveting machines and rivet nut tools for cabinet final assembly, evaluating fixed solutions for regular parts such as doors, and stocking common lead screws, riveting heads and seal rings by spec. Since outdoor-cabinet batches are relatively stable, equipment utilization and payback are easy to estimate; for maintenance support seeAutomatic Riveting Machine Maintenance and Parts Supply Guide。
Further reading:Rivet Nut Gun Common Faults and Installation Troubleshooting · Why Server-Cabinet & Data-Center Industries Use Automatic Riveting Machines · Automatic Rivet Nut Tool
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