As a key technology for metal surface treatment, the effect of flat drawing process directly depends on equipment operation and process control. This guide will systematically analyze the key points of the entire process from material preparation to finished product acceptance.

1、 Preliminary preparation

Material compatibility testing

Confirm the metal material (such as 304 stainless steel/6061 aluminum alloy) and initial surface condition (without deep scratches or oxide layers).

The recommended thickness of the board is 0.5-10mm, and ultra-thin parts need to be equipped with anti deformation fixtures.

Equipment parameter preset

Select the grit of the sand belt based on the target texture (straight thread: 400-600 grit; mirror effect: above 1500 grit).

Set the walking speed (usually 6-12m/min) and pressure (30-80N), and adjust according to the material hardness.

2、 Process control

Trial grinding and calibration

Take corner materials for trial processing, check the uniformity of texture, and adjust the tension of the sand belt if necessary (standard value: 40-60N).

Verify the effect using a colorimeter (Δ E<1.5) or a roughness meter (Ra target ± 0.1 μ m).

Batch production monitoring

Inspect every 30 minutes, with a focus on observing the consistency of texture at the edges of the board.

Timely clean the residual metal shavings on the sanding belt (it is recommended to stop the machine every 2 hours for cleaning).

3、 Finished product acceptance standards

Visual inspection: No visible color difference or broken lines under D65 standard light source.

Functional testing: Salt spray test for 96 hours without corrosion (compliant with GB/T 10125-2021).

Operation mnemonic:

One material inspection, two machine adjustments, trial grinding and calibration before mass production, sampling and cleaning are essential, and mirror drawing is easy to produce