1、 Core Performance Comparison Matrix

Comparison of manual drawing techniques for multifunctional flat drawing machines in different dimensions

Processing accuracy (μ m) Ra0.4-3.2 (controllable ± 0.1 μ m) Ra1.6-6.3 (fluctuation ± 1.5 μ m) 3-5 times

Consistency texture direction angle deviation<2 ° (laser positioning), visible direction difference to the naked eye (dependent on technician's touch), unquantifiable

The maximum processing width is 2500mm (CNC beam type), usually less than 600mm (limited by arm span), which is 4 times larger

Speed (m ²/h) 8-15 ㎡ (automatic feeding) 0.3-0.8 ㎡ (skilled worker) 20 times

Depth control of 0.01-0.5mm (servo motor ± 0.005mm) can only be visually judged for digital compaction

2、 Deep analysis of process capability

1. Complex surface processing

Mechanical drawing:

Customized copying fixtures are required (cost ¥ 500-2000/set)

Minimum curvature radius R5mm (special flexible sand belt)

Hand drawn:

Capable of handling R2mm micro curvature (such as watch cases)

But the transition of the surface is prone to "jumping" defects

2. Implementation of special effects

Sun pattern/random pattern:

Mechanical: Different grit sand belt combinations need to be replaced (# 180+# 400 cross machining)

Manual: achieved directly by changing the wrist swing trajectory (experience dependent)

3. Material adaptability

Material Type: Mechanical Drawing Advantages Scene: Hand drawn Drawing Cannot Replace Scene

Superhard alloy can be loaded onto diamond sand belts (HRC>60), which cannot be processed

0.3mm ultra-thin board requires a vacuum suction table (easily deformed) and manual lining for greater flexibility

Mirror stainless steel can be connected to polishing modules (Ra<0.1 μ m) for more precise local repair

3、 Economic comparison (based on an annual output of 50000 pieces)

Cost structure breakdown

Project Mechanical Drawing Hand Drawing

Equipment investment of 150000 to 500000 yuan (domestic/imported), tool cost<5000 yuan

Labor cost: 1 person for monitoring (¥ 80000/year), 6 technicians (¥ 480000/year)

Consumables wear and tear: Sand belt ¥ 120/meter (lifespan of 80h) Sand paper ¥ 5/sheet (lifespan of 15min)

Defective product rate<2% (automatic detection) 8-15% (visual leak detection)

Unit cost: ¥ 3-8 ¥ 12-25

Investment return calculation

Mechanical solution: 2-3 years to recover costs (calculated based on a two shift system)

Manual solution: Continuously high variable costs

4、 Special scenario decisive point

Choose mechanical wire drawing when:

Batch processing>100 pieces/day

The customer requests a process report with CPK>1.33

Continuous processing of materials with hardness greater than HRC40

Persist in hand drawing when:

Cultural relic restoration/art creation (requires emotional influence on texture)

Narrow spaces where on-site equipment cannot enter

Trial production stage (modification cost<fixture development fee)

5、 Future Fusion Trends

Human machine collaboration mode: 90% of the benchmark processing is completed by machinery, and the final 10% is manually refined (such as high-end car interior trim)

Intelligent compensation technology: By 3D scanning manual templates, automatically generate mechanical processing programs (error compensation<0.05mm)

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Ultimate suggestion:

Choosing machinery in the era of mass production - this is an inevitable choice for industrial civilization

Choosing handicrafts for artistic creation - this is the last fortress of craftsmanship spirit