Assemblies and kits
Riveted · fitted · kitted
Riveted and welded sheet-metal assemblies, and kits of matching metal and plastic parts, painted to match and packed as one unit.
QuantitiesKits and sub-assemblies in scheduled batches
Capabilities · 02 · Laser-cut · bent · welded · riveted
Sheet metal fabrication and laser cutting to your drawing
Custom sheet metal enclosures, brackets, panels and covers, fabricated to your drawing from flat pattern to finished part: laser cutting, press-brake bending, welding, press-fit hardware and riveting. Any bending tools and assembly fixtures your part needs are included in the quotation.
At a glance
| What we produce | Brackets, panels, covers, enclosures, frames, and riveted or welded sheet-metal assemblies. |
|---|---|
| Processes | Fiber laser cutting · press-brake bending · welding · press-fit hardware (PEM-type nuts and studs) · riveting with fixtures built for the job |
| Materials | Aluminum sheet (temper per drawing, for example H32), steel, stainless steel, brass and copper sheet. |
| Finishes | Anodizing, painting (PU and epoxy), passivation, silk-screen printing. |
| Tolerances | To your drawing and specification. Tolerances and features that cannot be held are raised before production; any drawing change is approved by you in writing. |
| Quantities | From prototype sets to production batches. |
| Lead time | The lead time depends on the part and is stated in the quotation, together with the date the order will be ready at the factory. |
| Documents | Inspection report; first-article report; material report where required; photos before and after packing. |
Cutting, forming and joining
Laser cutting
Flat patterns cut on fiber lasers from your DXF or from the flat pattern of your 3D model. Slots, windows and hole patterns are cut in the same pass, so their positions relate to each other.
Press-brake bending
Bends formed to your drawing. Bend radii, relief cuts and the order of bends are reviewed with the factory at the drawing stage, so the flat pattern and the tooling match the part.
Welding
Welded frames, brackets and enclosures. Weld locations, type and finish of the weld seam are taken from your drawing; where the drawing does not define them, this is raised before the quotation.
Hardware and riveting
Press-fit nuts, studs and standoffs, and riveted assemblies. Riveting is done in fixtures built for your part, so repeat batches stay identical.
Materials
| Material | Examples of grades | Applications | Suitable finishes | Note |
|---|---|---|---|---|
| Aluminum | Sheet in tempers such as H32 | Covers, panels, light brackets | Anodizing, painting, silk-screen | The temper is held as drawn. A change from H32 to H34 is not made without your approval. |
| Steel | Grade per drawing | Frames, brackets, enclosures | Painting (PU and epoxy) | State whether the painted surface is cosmetic; this determines masking and handling. |
| Stainless steel | Grade per drawing | Brackets and covers exposed to moisture or cleaning | Passivation, brushed or as rolled | State the grain direction on brushed parts that must match. |
| Brass and copper | Grade per drawing | Contacts, shields, small formed parts | On request | Formability depends on temper; we confirm it with the factory before the quotation. |
Finishes
| Finish | Materials | What to specify |
|---|---|---|
| Anodizing | Aluminum | Color and faces to mask. Bent parts are anodized after forming. |
| Painting (PU and epoxy) | Steel, aluminum | Color, gloss and which faces are cosmetic. Masked threads and contact faces are shown on the drawing. |
| Passivation | Stainless steel | Whether a salt-spray test is required. |
| Silk-screen printing | Painted and anodized parts | Printed from your PDF artwork; position and color as drawn. |
Tolerances and inspection
Tolerances come from your drawing and specification. Your drawings go to the production engineers of the factory selected for your part. If a tolerance or a feature cannot be held, we raise it before production, and any change to the drawing is confirmed and approved by you in writing. Production is to the drawing.
Sheet-metal parts carry two kinds of tolerance: on cut features, which come from the laser, and across bends, which add up with every bend. If a dimension across several bends is critical, mark it, and the factory plans the bend order and fixtures around it. Flatness after welding and the position of press-fit hardware are reviewed as standard at drawing review.
Inspection and documents
The factory inspects each order to your drawing or QC sheet and supplies a report. Our team in China then carries out an independent quality verification at the factory, after production and before the goods are released, and the packing is photographed. Where you specify 100% inspection, every part is inspected. Where first articles are required, series production is released only after your written confirmation. Material reports or certificates are supplied where your drawing or PO requires them.
Design notes
From a past order
Check thread engagement in thin sheet.
A #4-40 thread in 2 mm sheet leaves little engagement. The factory raised it at drawing review, before production, and a press-fit nut was agreed in writing.
Engineering note
Hold the temper as drawn.
Aluminum sheet in H32 and H34 bends differently. A change of temper is made only with your written approval.
Engineering note
Dimension from the features that matter.
Dimensions across several bends accumulate tolerance. Dimension to the holes and faces that locate the part in your assembly.
Engineering note
Plan rivets with a fixture.
Flush rivets depend on the riveting setup. State the flushness requirement on the drawing; the factory plans the riveting fixture for the part before production.
Example parts
What to send for a quote
- PDF drawing with tolerances, bend details and revision letter
- STEP model and, if you have one, the DXF flat pattern; state which is the master
- Material, thickness and temper
- Finish, color and cosmetic faces
- Hardware: part numbers or type of nuts, studs and rivets
- Quantities: prototype set, first batch and expected yearly volume
- Documents you need with the parts
Send to or@paxis-hk.com. The RFQ checklist explains each item.
Questions
Do you produce single prototypes in sheet metal?
Yes. Laser cutting and press-brake bending need no part-specific tooling for most parts, so prototype sets are practical. Any fixture or special tool your part requires is stated in the quotation.
Can you weld and paint the same part?
Yes. Welding is done by the factory, and painting by a specialist shop that works with it. Masked faces and cosmetic surfaces are agreed before production.
Do you install press-fit hardware?
Yes, press-fit nuts, studs and standoffs, to the part numbers or types on your drawing. See the design note on threads in thin sheet.
What files do you need?
The PDF drawing and a STEP model. A DXF flat pattern is welcome; state which file is the master if they differ.
Further reading
Related capabilities
Technical illustration
EVA and custom packaging
Cut · printed · packed
Foam inserts that hold each part in place, cases, printed boxes with your artwork, and protective films cut to your DXF.
QuantitiesTo your order quantity
CNC machining
Milled · turned · 5-axis
Housings, holders, plates, pins, shafts and rings in aluminum, stainless steel, steel, brass, copper and technical plastics.
QuantitiesFrom about 10 first articles to production lots of thousands
Send your sheet-metal drawing
Email the PDF and STEP files with material, finish and quantities to or@paxis-hk.com, or use the short form. Drawing questions are raised before the quotation.