kiosk stand welding & assembly

1 Metal Parts Fabrication

CHALLENGES

• Assembly Gaps: If the front panel, back cover, side brackets, and base are not cut and bent to tight tolerances, gaps will appear during welding, compromising the enclosure's structural integrity and appearance.
• Bend Angle Deviation: Inaccurate bending of the main stand and side panels causes misalignment during welding, making assembly difficult and the finish uneven.
• Burrs & Sharp Edges: Laser-cut edges can have burrs that prevent tight fit-up and pose a safety risk during handling.
• Large Panel Warping: The tall main stand panel is prone to warping during laser cutting or handling if not properly supported.

OUR METHOD

• Sheet Metal Fabrication: We use cold-rolled steel and laser-cut the front panel, back cover, side brackets, base, and other components according to the drawings.
• Tight Tolerance: To reduce assembly gaps, all parts are produced with a tight tolerance of ±0.1 mm.
• Precise Bending: We use a bending machine to form the side panels and main stand, which ensures perfect accuracy on bend angles and radii.
• Deburring: All laser-cut edges are deburred before bending to ensure safe handling and tight fit-up.
• Warp Prevention: Large panels are supported during cutting and bending to prevent warping.

2 Kitting

CHALLENGES

• Part Mix-Ups: Left and right side brackets look similar, and different screw lengths or weld stud types are easy to confuse.
• Missing Components: A single missing screw, weld stud, or screen bezel can halt the entire assembly line.

OUR METHOD

• All components, including sheet metal parts, screws, weld studs, and the screen bezel, are kitted according to the Bill of Materials (BOM).
• Every part is labeled to ensure no components are missing or mismatched before assembly begins.
• We use color-coded labels and one bin per complete kit, so the operator grabs the bin and moves on — no picking parts one by one.

3 Incoming Quality Control (IQC)

CHALLENGES

• Inconsistent Bent Angles: If the bend angle is off, the enclosure won't square up during welding, causing gaps and misalignment.
• Surface Defects: Scratches, rust, or dents on sheet metal parts will show through the powder coating and cause customer returns.
• Non-Compliant Materials: Using the wrong steel grade or uncertified fasteners can compromise structural integrity and weather resistance.
• Weld Stud Quality: Poorly manufactured weld studs or rivet nuts can fail during welding or assembly, leading to loose connections.

OUR METHOD

• Before assembly, all components are inspected based on ISO 9001 standards — dimensions (especially bent angles and location), surface quality, material certifications, and the quality & quantity of weld studs, rivets, and fasteners.
• Any parts that fail inspection are quarantined and returned to the supplier with an NCR (Non-Conformance Report).

4 Welding & Assembly

CHALLENGES

• Weld Distortion: The tall, thin main stand and base are prone to heat distortion during welding, causing the kiosk to lean or the screen bezel to misalign.
• Weld Quality: The kiosk must withstand public use and potential impact. Welds with porosity, undercut, or lack of fusion can easily fracture.
• Loose Connections: If rivets or weld studs are not set properly, the panel, cover, and brackets won't connect tightly, leading to rattling and structural failure.
• Screen Bezel Misalignment: The bezel must align perfectly with the front panel opening, or the display will look unprofessional and may not fit.
• Base Flatness: The base must sit perfectly flat on the floor, or the kiosk will wobble — a safety hazard.

OUR METHOD

5 Powder Coating

CHALLENGES

• Poor Coverage in Blind Spots: Electrostatic powder struggles to reach inside corners, the backside of the bezel, and around weld seams, leading to bare spots and corrosion.
• Coating Adhesion: Inadequate pre-treatment (shot blasting) can cause the coating to peel, especially in high-traffic public areas.
• Color Consistency: The two-tone silver/blue color must be uniform across the entire enclosure, including hard-to-reach areas.
• Weld Seam Finish: Weld seams must be ground smooth before coating, or they show through as bumps or shadows.

OUR METHOD

• Seam Grinding: Once assembly and welding are complete, we grind all visible weld seams smooth, then shot blast and powder coat.
• Two-Tone Coat: The silver/blue powder coat makes the kiosk highly visible and helps it resist scratches and weather.
• Blind-Spot Coverage: We optimize hanger design for proper grounding and adjust spray gun angles to reach blind spots.
• Adhesion Control: We control shot blasting roughness (Sa 2.5 grade) and apply a phosphate pre-treatment before coating to enhance adhesion.
• Curing: High-temperature curing ensures coating hardness meets stone-chip and weather-resistance standards.

6 Quality Control

CHALLENGES

• Hidden Defects: Internal weld quality, rivet tightness, and coating adhesion cannot be detected by visual inspection alone.
• Dimensional Deviation: If the enclosure is not square, it won't mount properly on the floor or wall, causing installation problems.
• Weld Failure: A unit that passes visual inspection may still have weak welds that fail under load or impact.
• Weather Resistance Failure: A unit that passes visual inspection may still rust after prolonged exposure to humidity or cleaning chemicals.

OUR METHOD

• FAI: Full dimensional and functional report on the first production batch.
• In-Process Checks: Weld visual, rivet tightness, screen bezel alignment, and base flatness checked every 10–20 pieces.
• 100% Visual Inspection: Coating uniformity, color match, and cosmetic appearance checked on every unit.
• Salt Spray Testing: Samples from each batch are tested to verify corrosion resistance.
• Weld Testing: Penetrant testing (PT) or destructive testing on samples to verify weld integrity.

7 Packaging

CHALLENGES

• Transport Damage: Kiosk stands are large, heavy, and have a painted finish that is easily scratched or chipped in global shipping.
• Lost Hardware: Screws, rivets, and mounting brackets can easily go missing in transit.
• Screen Bezel Damage: The screen bezel and display area are vulnerable to impact during shipping.

OUR METHOD

• Each kiosk stand is protected using custom-molded foam inserts to prevent damage during shipping.
• The screen bezel and display area are covered with a protective film or foam pad.
• Small hardware is placed in individually sealed PE bags, secured to a fixed position inside the box to prevent shifting.
• We use 5-layer corrugated boxes with added corner protectors to ensure stacking strength.

1 Incoming Quality Control (IQC)

• Dimension Inspection: We measure the sheet metal parts with a calibrated vernier, protractor, and height gauge — bent angles and hole locations get a close look. Hold it to ±0.1 mm.
• Surface Quality Check: Look it over and run a hand across it — sharp edges, burrs, rust, scratches, dents. If your finger catches on anything, it's not passing.
• Material Certification Review: Before we accept a batch, we pull the Mill Test Certificate and check it against the spec — chemical composition and mechanical properties have to match. No MTC, no intake.
• Hardware Inspection: We check that the threads are clean, plating intact, and grade marking legible. If the count is short or the grade is wrong, we return the lot.

2 In-Process Checks

• Weld Visual Inspection: Check for weld bead uniformity, leg length, undercut, porosity, spatter, and crater cracks. Use weld gauges where applicable.
• Rivet Tightness Check: Verify rivets are fully set and the panel, cover, and brackets are tightly connected. No movement or rattling allowed.
• Screen Bezel Alignment: Confirm the bezel is correctly aligned with the front panel opening and securely fastened.
• Base Flatness Check: Verify the base sits flat on a surface plate or master jig. No wobble allowed.
• Bend Angle Verification: Check the angle and radius against the drawing. Keep it within ±1°, or it goes back for rework.

3 First Article Inspection (FAI)

• Full Dimensional Report: We measure every critical dimension on the CMM or with calibrated hand tools: overall length, width, height, bend angles, mounting hole positions, bracket locations, and base flatness.
• Assembly Report: We write down four things — are the welds strong and clean, are the rivets pulled tight, is the screen bezel sitting straight, and does the base sit flat? No blanks, every line gets a result.
• Material Verification: We pull the MTC and match the grade to what's on the certificate. If the grade doesn't read right, the batch doesn't come in.
• Surface Finish Check: Gauge the coating thickness and hold the part up against the color standard. If the coat is too thin or off-color, it doesn't pass.
• Fitment Trial: Mount the kiosk onto a master jig or actual floor/wall frame to confirm fitment.

4 Random Sampling (AQL-Based)

• AQL Standard: Use ISO 2859-1 / GB/T 2828.1 (or equivalent) with AQL levels 1.0 – 2.5 depending on criticality.
• Sampling Plan: Determine sample size (AQL 1.5), for example: Lot 500 pcs → Sample 50.
• Inspection Items: Dimensional check, weld visual, rivet tightness, coating thickness, color match, mounting hole position, base flatness.
• Recording: Log results in the QC sampling record sheet.

5 100% Inspection

• Coating Uniformity: Every part gets a visual check for bare spots, orange peel, runs, sags, or color mismatch.
• Coating Thickness: Verify film thickness is within 60–120 μm using a magnetic or eddy current gauge.
• Weld & Assembly Check: 100% visual check for weld defects, loose rivets, misaligned bezel, or base wobble.
• Mounting Hole Fitment: Insert Go/No-Go gauge pins into all mounting holes to verify diameter and position.

6 Functional & Environmental Testing

• Weld Testing: Penetrant testing (PT) or destructive testing on samples to verify weld integrity.
• Salt Spray Test: Samples from each batch are tested to verify corrosion resistance (≥ 48 – 96 hours).