I. Archway ontology (rack) failure

1.Window working surface wear

Long-term rolling impact + iron oxide scale abrasive wear, the window size increases, the machine frame assembly accuracy decreases, rolling vibration, plate shape fluctuation.

2.Window scratches, grooves, pitting corrosion

Cracked liners, metal foreign objects entering the mating surface, under reciprocating sliding, scratches and grooves are pulled out on the base of the frame; in severe cases, online spraying repair is required.

3.Frame deformation

Long-term alternating rolling loads, accident overload, temperature difference stress cause the frame to undergo slight distortion, parallelism and perpendicularity of the window exceed the standard, and the roll system alignment is poor.

4.Stress cracks

Stress concentration areas such as window corners, anchor bolts, lowering installation seats, etc., produce fatigue cracks under heavy load impact, which is a major safety hazard.

5.Anchor bolts loosening / fracture

Steel biting impact causes fatigue of the bolts, the frame shakes, and the liner and slide plate accelerate wear.

II. Failure of the liner plates (mainly copper alloy / composite wear-resistant liner plates)

1.Lining plate ablation, glued brake

Lubrication interruption, oil passage blockage, oil film rupture on the sliding surface, direct dry friction of metal, high temperature causes the surface of the lining plate to turn blue, metal adhesion, press-down mechanism gets stuck.

2.Rapid wear of the lining plate, reduction in thickness

Incorrect material selection, poor lubrication, failure of dust prevention, iron oxide particles enter, rapid decrease in lining plate thickness, exceeding tolerance.

3.Cracking, splitting, and detachment of the lining plate

Excessive impact load, failure of lining plate fixing pins / stop blocks, improper assembly pre-tightening, cracking at the edges and corners of the lining plate, even complete detachment.

4.Micro-damage of the lining plate

Small reciprocating sliding + moisture and dust, rusting occurs on the back of the lining plate, powder-like wear products are produced, poor adhesion of the lining plate.

5.Lining plate thermal deformation

Local overheating causes the lining plate to bulge, gap becomes smaller, prone to jamming.

III. Skateboard Malfunction (Sliding Components Mating with the Liner Plate)

1.Excessive gap in the slide plate

The working surface of the slide plate is continuously worn, and the gap on one side exceeds the threshold; the frame moves horizontally, causing rolling vibration, deviation of the steel strip, wavy shape, and thickness fluctuation.

2.Surface scratches and indentations on the slide plate

Hard particles (oxide scale, broken metal chips) enter the sliding pair, causing abrasive wear, and deep scratches of varying depths appear on the surface.

3.Deformation of the slide plate

Uneven heating, assembly stress, and impact loads cause the flatness of the slide plate to deteriorate, resulting in local point contact and local stress concentration, accelerating damage.

4.Failure of slide plate fixation

The positioning screws and stop blocks are worn and broken, causing the slide plate to shift, directly disrupting the window fit relationship.

IV. Systemic Derivative Failures (Chain Reaction Caused by Arch - Bearing Plate - Slide Plate)

1.Pressing down with stuck mechanism, slow action response

The liner brake is stuck, the slide plate is deformed, the gap is too small, the pressing-down screw rod cannot move smoothly, the roll gap adjustment fails, and emergency shutdown occurs.

2.Low-frequency vibration during rolling, poor plate shape

Excessive gap is a common cause. The frame shakes, the roll gap is dynamically unstable, and the steel strip shows periodic thickness differences and wavy shape.

3.Accompanying damage to the rolls and the rolling machine bearings

The frame shaking brings additional alternating loads. The rolls vibrate more, the bearings bear additional impacts, and the bearings prematurely flake off and fail.

4.Quick damage to dust-proof seals

Excessive frame movement and vibration, the window dust-proof iron sheet deforms and breaks. Dust and cooling water are more likely to invade the mating surface, further exacerbating abrasive wear.

V. Fault Rapid Troubleshooting Logic (Summarized in One Sentence)

Pressing down the jamming and braking → First, check if the lubrication has been interrupted, if the liner has been abraded, and if the gap is too small.

Rolling vibration and unstable plate shape → First, measure the sliding plate / liner fitting clearance and the parallelism of the window.

Short-term wear of the liner → First, check the material selection, dust prevention, and the intrusion of iron oxide scale.