Flat pattern generation in Solidworks - Real Business Scenario

Scenario Mode

👤 Your Role: You are a manufacturing engineer at a sheet metal fabrication company.

📋 Request: Your manager wants a report showing the flat pattern dimensions and material usage for a new sheet metal part design to optimize production.

📊 Data: You have access to the 3D sheet metal part files in SolidWorks and their flat pattern data including length, width, bend allowances, and material thickness.

🎯 Deliverable: Create a dashboard report summarizing flat pattern dimensions, total material area used, and bend counts for the new parts.

Sample Data

Part Number	Flat Length (mm)	Flat Width (mm)	Bend Count	Material Thickness (mm)
SM1001	250	150	4	1.5
SM1002	300	200	6	1.5
SM1003	180	120	3	1.2
SM1004	220	160	5	1.5
SM1005	270	180	4	1.2
SM1006	310	210	7	1.5
SM1007	200	140	3	1.2
SM1008	260	170	5	1.5

1

Step 1: Import the flat pattern data from SolidWorks into your BI tool as a table with columns: Part Number, Flat Length, Flat Width, Bend Count, Material Thickness.

Load data as is from exported CSV or Excel file.

Expected Result

Data table with 8 rows and 5 columns loaded correctly.

2

Step 2: Create a calculated column named 'Material Area (mm²)' to find the flat pattern area for each part by multiplying Flat Length by Flat Width.

[Material Area (mm²)] = [Flat Length (mm)] * [Flat Width (mm)]

Expected Result

Material Area values calculated, e.g. for SM1001: 250 * 150 = 37500 mm².

3

Step 3: Create a measure to calculate the total material area used across all parts by summing the 'Material Area (mm²)' column.

Total Material Area = SUM([Material Area (mm²)])

Expected Result

Total Material Area = 250*150 + 300*200 + 180*120 + 220*160 + 270*180 + 310*210 + 200*140 + 260*170 = 340200 mm².

4

Step 4: Create a measure to calculate the average bend count across all parts.

Average Bend Count = AVERAGE([Bend Count])

Expected Result

Average Bend Count = (4 + 6 + 3 + 5 + 4 + 7 + 3 + 5) / 8 = 4.625 bends.

5

Step 5: Build a dashboard with a table visual showing Part Number, Flat Length, Flat Width, Bend Count, Material Thickness, and Material Area columns.

Configure table visual with these columns in the BI tool.

Expected Result

Table displays all parts with their flat pattern dimensions and calculated material area.

6

Step 6: Add card visuals to the dashboard showing Total Material Area and Average Bend Count measures for quick summary.

Add card visuals linked to Total Material Area and Average Bend Count measures.

Expected Result

Dashboard shows total material area as 340,200 mm² and average bend count as 4.625.

7

Step 7: Add a bar chart visual showing Material Area by Part Number to identify the largest parts by material usage.

Configure bar chart with Part Number on X-axis and Material Area on Y-axis.

Expected Result

Bar chart displays material area for each part, highlighting SM1006 as largest.

Final Result

-------------------------------------------------------------
| Part Number | Length (mm) | Width (mm) | Bend Count | Material Thickness (mm) | Material Area (mm²) |
|-------------|-------------|------------|------------|------------------------|---------------------|
| SM1001      | 250         | 150        | 4          | 1.5                    | 37500               |
| SM1002      | 300         | 200        | 6          | 1.5                    | 60000               |
| SM1003      | 180         | 120        | 3          | 1.2                    | 21600               |
| SM1004      | 220         | 160        | 5          | 1.5                    | 35200               |
| SM1005      | 270         | 180        | 4          | 1.2                    | 48600               |
| SM1006      | 310         | 210        | 7          | 1.5                    | 65100               |
| SM1007      | 200         | 140        | 3          | 1.2                    | 28000               |
| SM1008      | 260         | 170        | 5          | 1.5                    | 44200               |
-------------------------------------------------------------

Summary Cards:
- Total Material Area: 340,200 mm²
- Average Bend Count: 4.625

Bar Chart: Material Area by Part Number (SM1006 highest)

✓SM1006 uses the most material area at 65,100 mm².

✓Average bend count across parts is about 4.6, indicating moderate complexity.

✓Total material area needed for all parts is 340,200 mm², useful for material ordering.

✓Parts vary in size and bend count, so production planning can prioritize larger or more complex parts.

Bonus Challenge

Add a calculated column to estimate material cost per part by multiplying material area by a cost rate per mm², then create a dashboard visual showing cost per part.

Show Hint

Use a fixed cost rate, e.g., 0.05 currency units per mm², and multiply it by the Material Area column.

Practice

1. What is the main purpose of flat pattern generation in SolidWorks sheet metal design?

easy

A. To unfold 3D sheet metal parts into flat shapes for manufacturing

B. To create 3D models from 2D sketches

C. To simulate the bending process in animations

D. To add colors and textures to sheet metal parts

Solution

1. Step 1: Understand flat pattern generation

   Flat pattern generation unfolds a 3D sheet metal part into a flat shape.

2. Step 2: Identify its use in manufacturing

   This flat shape is used to prepare manufacturing drawings and cutting templates.

3. Final Answer:

   To unfold 3D sheet metal parts into flat shapes for manufacturing -> Option A

4. Quick Check:

   Flat pattern = Unfold 3D to flat [OK]

Hint: Flat pattern means unfolding 3D to flat shape [OK]

Common Mistakes:

• Confusing flat pattern with 3D modeling
• Thinking it adds colors or textures
• Assuming it simulates bending animations

2. Which SolidWorks tab contains the tool to create a flat pattern of a sheet metal part?

easy

A. Sheet Metal tab

B. Sketch tab

C. Features tab

D. Evaluate tab

Solution

1. Step 1: Locate the flat pattern tool

   The 'Flatten' tool is found in the Sheet Metal tab in SolidWorks.

2. Step 2: Confirm tab purpose

   The Sheet Metal tab contains tools specific to sheet metal design, including flat pattern generation.

3. Final Answer:

   Sheet Metal tab -> Option A

4. Quick Check:

   Flatten tool location = Sheet Metal tab [OK]

Hint: Flat pattern tool is in Sheet Metal tab [OK]

Common Mistakes:

• Selecting Features tab which is for general features
• Choosing Sketch tab which is for 2D sketches
• Confusing Evaluate tab with analysis tools

3. Given a sheet metal part with bends, what will happen when you click the Flatten button in SolidWorks?

medium

A. The part will be converted into a 2D sketch with all bends removed

B. The part will unfold to show a flat pattern including bend allowances

C. The part will be deleted and replaced with a flat plate

D. The part will be exported as a 3D mesh for simulation

Solution

1. Step 1: Understand the Flatten function

   Clicking Flatten unfolds the 3D sheet metal part into a flat pattern, preserving bend allowances.

2. Step 2: Identify what Flatten does not do

   It does not remove bends or delete the part; it shows the flat shape for manufacturing.

3. Final Answer:

   The part will unfold to show a flat pattern including bend allowances -> Option B

4. Quick Check:

   Flatten = Unfold with bends [OK]

Hint: Flatten unfolds part keeping bend info [OK]

Common Mistakes:

• Thinking Flatten removes bends completely
• Assuming it deletes the part
• Confusing flatten with exporting mesh

4. You tried to create a flat pattern but the Flatten button is disabled. What is the most likely cause?

medium

A. The software license expired

B. The part has no sketches

C. The part is fully flattened already

D. The part is not a sheet metal part

Solution

1. Step 1: Check part type requirement

   Flatten works only on sheet metal parts. If the part is not sheet metal, Flatten is disabled.

2. Step 2: Exclude other causes

   Having no sketches or license issues do not disable Flatten; also, Flatten button is active even if already flat.

3. Final Answer:

   The part is not a sheet metal part -> Option D

4. Quick Check:

   Flatten disabled = Not sheet metal part [OK]

Hint: Flatten only works on sheet metal parts [OK]

Common Mistakes:

• Assuming sketches are needed for Flatten
• Thinking license issues disable only Flatten
• Believing Flatten disables if part is flat

5. You designed a complex sheet metal part with multiple bends and want to prepare a cutting template. Which steps should you follow to generate an accurate flat pattern for manufacturing?

hard

A. Export the 3D model as STL and use a 3D printer to make the template

B. Manually redraw the part in 2D sketch mode without bends

C. Use the Flatten tool in the Sheet Metal tab, verify bend allowances, then create a drawing from the flat pattern

D. Use the Features tab to convert the part to solid and then flatten

Solution

1. Step 1: Use Flatten tool in Sheet Metal tab

   This tool unfolds the part into a flat pattern including bend allowances.

2. Step 2: Verify bend allowances and create drawing

   Check the flat pattern for accuracy, then create a manufacturing drawing from it.

3. Final Answer:

   Use the Flatten tool in the Sheet Metal tab, verify bend allowances, then create a drawing from the flat pattern -> Option C

4. Quick Check:

   Flatten + verify + drawing = Accurate flat pattern [OK]

Hint: Flatten, check bends, then draw for manufacturing [OK]

Common Mistakes:

• Exporting 3D model instead of flat pattern
• Redrawing manually losing bend info
• Using Features tab which is not for flattening sheet metal