鈑金模型

封住現有的零件來建立鈑金模型：

1. While in a Part Studio, click .

   

2. 選擇鈑金操作的類型：轉換
3. 選擇要封住的零件。
4. 選擇要排除在操作之外的面。
5. Select the edges to define bends; edges not selected are made into rips.

   Arcs or splines not selected in the "Edges or cylinders to bend" field become tangent joints, not bends. See the example below.

6. Specify applicable options:
   1. Clearance from input - The relative offset between the sheet metal and the part selected to be enclosed by the sheet metal
   2. Include bends - Check this to include the bend within the clearance value
   3. Keep input parts - Keep the selected parts (enclosed by the sheet metal) or not
   4. Thickness - The thickness of the sheet metal
   5. Bend radius - The inside radius of the bends created
   6. Flip direction up - Reverses the orientation of the sheet metal model. This is useful when defining whether bends are up or down, relative to the model.
   7. 彎折計算 - 決定計算彎折的方式。選項有：
      • K 係數 (預設) - 使用中立軸與材料厚度的比例。
      • 彎折裕度 - 使用彎折相切點之間的中立線弧長。
      • 彎折扣除 - 使用凸緣長度總合 (從邊線到頂端) 與初始展開長度間的差異。

      會將在這裡選擇的彎折計算用為鈑金表格中的一個欄位。可以自訂每個彎折並可從表格中直接編輯。詳細資訊請參考鈑金表格與展開視圖。

   8. Default bend K Factor - The fraction of material thickness on which the neutral axis lies on a bend. (Default is 0.45.)
   9. Rolled K Factor - The fraction of material thickness on which the neutral axis lies on a section of rolled wall. (Default is 0.5.)
   10. Minimal gap - The smallest gap between the sheet metal edges defining a rip
   11. Corner relief type -
       • Square - Sized

         Flat view: 3D view:

       • Rectangle - Scaled

         Flat view: 3D view:

       • Round - Sized

         Flat view: 3D view:

       • Round - Scaled

         Flat view: 3D view:

       • Closed

         Flat view: 3D view:

       • Simple

         Flat view: 3D view:

   12. Corner relief scale - The scale of the corner opening (for Scaled openings), a value between 1.00 and 2.00.
   13. Corner relief width - The measurement of the width of the corner opening (for Sized openings), in default units or specified units.
   14. Bend relief type - The shape of the bend relief:
       • 矩形 - 縮放

       

       • 圓端 - 縮放

       

       • 撕裂
       ：

       

       • Bend relief depth scale - A value between 1.00 and 5.00. Once you enter a value it becomes the default across all documents.

         A value of 1 results in an obround bend relief perfectly touching the bend and a rectangular bend relief matches the depth of the obround:

         

         

         任何超過 1 的值會根據此公式：((深度比例 -1) * 彎折半徑)：

         

         

       • Bend relief width scale - A value between 0.0625 and 2.00. The width of the bend relief is calculated via the formula: thickness * width scale. Once you enter a value it becomes the default across all documents.
7. Click to accept the feature; the Sheet metal model is listed in the Feature list.
8. 請於此時套用任何其他特定的鈑金特徵，請見下方說明。
9. Click Finish sheet metal model if you want to continue to add non-sheet metal features to your part.
   1. Click to close the Sheet metal feature; the Finish sheet metal model feature is listed in the Feature list.

擠出草圖曲線來建立鈑金模型：

1. While in a Part Studio, click .

   

2. 選擇擠出的鈑金操作。
3. 選擇要擠出的草圖曲線。
4. 選擇終止類型：給定深度、成形至下一幾何、成形至面、成形至零件、成形至一頂點。
5. 對稱 - 選擇這個選項，僅能在「給定深度」終止類型中使用。指定總距離，會相對於草圖平面在兩個方向上各以一半的距離擠出。
6. 拖曳或設定深度。
7. 設定鈑金的厚度。
8. 設定彎折的內部半徑。
9. 如果您要反轉鈑金模型的方位，請核取 [反轉方向朝上]。
10. Select the Bend calculation to determine how the bends are calculated. Options are:
    • K 係數 (預設) - 使用中立軸與材料厚度的比例。
    • 彎折裕度 - 使用彎折相切點之間的中立線弧長。
    • 彎折扣除 - 使用凸緣長度總合 (從邊線到頂端) 與初始展開長度間的差異。

    會將在這裡選擇的彎折計算用為鈑金表格中的一個欄位。可以自訂每個彎折並可從表格中直接編輯。詳細資訊請參考鈑金表格與展開視圖。

11. Specify the K Factor - The fraction of material thickness on which the neutral axis lies.

12. Set Minimal gap - The smallest gap between sheet metal edges.
13. Corner relief type:
    • Square - Sized

      Flat view: 3D view:

    • Rectangle - Scaled

      Flat view: 3D view:

    • Round - Sized

      Flat view: 3D view:

    • Round - Scaled

      Flat view: 3D view:

    • Closed

      Flat view: 3D view:

    • Simple

      Flat view: 3D view:

14. Corner relief scale - The scale of the corner opening (for Scaled corners); a value between 1.00 and 2.00.
15. Bend relief type - The shape of the bend relief:
    • 矩形 - 縮放：

    

    • 圓端 - 縮放：

    

    • 撕裂：

    

16. Bend relief depth scale - Between 1.00 and 2.00
17. Bend relief width scale - A value between 0.0625 and 2.00
18. Click to accept the feature; the Sheet metal model is listed in the Feature list.
19. 請於此時套用任何其他特定的鈑金特徵，請見下方說明。
20. Click Finish sheet metal model if you want to continue to add non-sheet metal features to your part.
21. Click to close the Sheet metal feature; the Finish sheet metal model feature is listed in the Feature list, has a flat pattern and a sheet metal table listing the bends and joints:

當使用弧或樣條來定義捲曲鈑金壁時，鈑金表格與展開圖樣會稍有不同。在表格中不會列出捲曲鈑金壁的彎折，而是列出相切接合：

同樣地，展開圖樣中不會有彎折線，因為沒有做出彎折。

您可以決定是否要將弧擠出為彎折，不過在「擠出為彎折的弧」欄位啟用的情況下選擇弧 (如下所示)：

這樣會使得所選的一或多個弧被建立為彎折 (而非相切的接合)，並列於彎折表格中，但半徑會是反灰的。這是因為弧在草圖中已有半徑，所以您無法在彎折表格中編輯半徑。

藉由加厚面、曲面或草圖區域來建立鈑金模型：

1. While in a Part Studio, click .

   

2. 選擇鈑金操作的類型：加厚
3. 選擇草圖區域、平坦曲面或零件的面。
4. 選擇要用來建立彎折的邊線；未選取的邊線會變為裂口，在弧與樣條的狀況中則會變為相切的接合。
5. Specify applicable options:
   1. Clearance from input - The relative offset between the sheet metal and the part selected to be enclosed by the sheet metal
   2. Clearance includes bends - Check to include the clearance for bends
   3. Thickness - The thickness of the sheet metal
   4. Bend radius - The inside radius of the bends created
   5. Flip direction up - Reverses the orientation of the sheet metal model. This is useful when defining whether bends are up or down, relative to the model.
   6. 彎折計算 - 決定計算彎折的方式。選項有：
      • K 係數 (預設) - 使用中立軸與材料厚度的比例。
      • 彎折裕度 - 使用彎折相切點之間的中立線弧長。
      • 彎折扣除 - 使用凸緣長度總合 (從邊線到頂端) 與初始展開長度間的差異。

      會將在這裡選擇的彎折計算用為鈑金表格中的一個欄位。可以自訂每個彎折並可從表格中直接編輯。詳細資訊請參考鈑金表格與展開視圖。

   7. Default bend K Factor - The fraction of material thickness on which the neutral axis lies. (Default is 0.45.)

   8. Rolled K Factor - The fraction of material thickness on which the neutral axis lies on a section of rolled wall. (Default is 0.5.)

   9. Minimal gap - The smallest gap between sheet metal edges
   10. Corner relief type - The shape of the corner relief:
       • Square - Sized

         Flat view: 3D view:

       • Rectangle - Scaled

         Flat view: 3D view:

       • Round - Sized

         Flat view: 3D view:

       • Round - Scaled

         Flat view: 3D view:

       • Closed

         Flat view: 3D view:

       • Simple

         Flat view: 3D view:

   11. Corner relief scale - The scale of the corner opening (for Scaled corners); a value between 1.00 and 2.00.
   12. Bend relief type:
       • 矩形：

       

       • 圓端：

       

       • 撕裂：

       

   13. 折彎止裂深度比例 - 介於 1.00 與 2.00 之間。
   14. 折彎止裂寬度比例 - 介於 0.0625 到 2.00 之間。
6. Click to accept the feature; the Sheet metal model is listed in the Feature list.
7. 請於此時套用任何其他特定的鈑金特徵，請見下方說明。
8. Click Finish sheet metal model if you want to continue to add non-sheet metal features to your part.
9. Click to close the Sheet metal model feature; the Finish sheet metal model feature is listed in the Feature list.

當使用弧或樣條來定義捲曲鈑金壁時，鈑金表格與展開圖樣會稍有不同。在表格中不會列出捲曲鈑金壁的彎折，而是列出相切接合：

同樣地，展開圖樣中不會有彎折線，因為沒有做出彎折。

您可以決定是否要將弧加厚為彎折，不過在 [擠出為彎折的弧] 欄位啟用的情況下選擇弧 (如下所示)：

這樣會使得所選的一或多個弧被建立為彎折 (而非相切的接合)，並列於彎折表格中，但半徑會是反灰的。這是因為弧在草圖中已有半徑，所以您無法在彎折表格中編輯半徑。

Only a subset of available features can be added to active sheet metal models (Extrude > Remove, Move face, Boolean, and Hole for example). All features are represented in the feature list, the model in the graphics area, the sheet metal table, and the flat pattern. For example, you are able to Extrude > Remove a sketch to create an opening in an active sheet metal model. The resulting opening’s sides are always perpendicular to the wall it pierces.

Other Extrude options that modify the model such as Add or Intersect are not allowed until the model is deactivated using the Finish sheet metal model tool.

請注意，用來修改已停用鈑金模型的之後特徵對零件的作用就像在非鈑金零件上的特徵一樣，並不會影響展開圖樣或表格值。

如果需要，可使用圓角與倒角來柔化鈑金的邊緣。請注意，必須選擇鈑金上明確轉角的邊線而不是相鄰的邊線。同時請注意，目前無法在鈑金上使用進階的圓角與倒角特徵 (例如，圓錐圓角)。

雖然有圓角或倒角，Onshape 會維持原始的建構邊線，並為之後的特徵使用該原始建構邊線。例如，若是在圓角邊線上建立凸緣，會忽略圓角並沿著原始的邊線建立凸緣。如果需要，您可以使用「移動面」工具來將凸緣的邊線移回至圓角的邊線上。

在轉角上產生圓角：

建立凸緣：

使用「移動面」來移動凸緣的邊線：

重新圓化轉角：

您可以使用複製排列工具 (線性複製排列、環狀複製排列與曲線複製排列) 中的「面」參數，或是使用鏡射鈑金面與凸緣來複製排列鈑金面與凸緣。如正常方式一般使用工具，只要確定選擇「面」做為複製排列類型，或在鏡射時選擇面即可：

當鈑金模型啟用時 (在建立或編輯鈑金的過程中)，其他可用的工具包括：

• 凸緣 - 為每條所選的邊線建立牆面，使用彎折來連接所選的邊線。
• 摺邊 - 在現有的鈑金零件上為所選取的邊線/面建立摺邊。
• 薄板頁 - 將一個薄板頁加入至鈑金凸緣中。
• Bend - Bend a sheet metal model along a reference line, with additional bend control options.
• 製作接合 - 將兩個牆面的相交處轉換為一個接合特徵，可以是一個彎折 (以圓柱幾何接合牆面)，或是一個裂口 (兩個牆之間的小間隙)。
• 轉角 - 修改轉角類型與止裂比例。
• 彎折止裂 - 修改彎折止裂 (在彎折結束與自由邊線交會處做出的小切除)、深度與止裂寬度。
• Modify joint - Make changes to an existing joint, such as converting a bend to a rip. Currently available through the flat view table.
• Corner break - Break the corner on existing sheet metal parts by applying a fillet or chamfer. Select a corner edge or vertex and specify corner break type and distance. It is recommended to use this feature after all flanges and joints of the Sheet metal model are finalized.
• Sheet metal table and flat view - Open and close the Rip/Bend tables and the visualization of the sheet metal model flat pattern. Use this table to convert rips to bends and vice versa.
• 完成鈑金模型 - 關閉 (停用) 鈑金模型；建立特徵清單中的特徵。

封住現有的零件來建立鈑金模型：

1. While in a Part Studio, tap .
2. 選擇鈑金操作的類型：轉換
3. 選擇要封住的零件。
4. 選擇要排除在操作之外的面。
5. Select the edges to define bends; edges not selected are made into rips.

   Arcs or splines not selected in the Edges or cylinders to bend field become tangent joints, not bends.

6. Specify applicable options:
   1. Clearance from input - The relative offset between the sheet metal and the part selected to be enclosed by the sheet metal
   2. Clearance includes bends - Check this to include the bend within the clearance value
   3. Keep input parts - Keep the selected parts (enclosed by the sheet metal) or not
   4. Thickness - The thickness of the sheet metal
   5. Bend radius - The inside radius of the bends created
   6. Flip direction up - Reverses the orientation of the sheet metal model. This is useful when defining whether bends are up or down, relative to the model.
   7. 彎折計算 - 決定計算彎折的方式。選項有：
      • K 係數 (預設) - 使用中立軸與材料厚度的比例。
      • 彎折裕度 - 使用彎折相切點之間的中立線弧長。
      • 彎折扣除 - 使用凸緣長度總合 (從邊線到頂端) 與初始展開長度間的差異。

      會將在這裡選擇的彎折計算用為鈑金表格中的一個欄位。可以自訂每個彎折並可從表格中直接編輯。詳細資訊請參考鈑金表格與展開視圖。

   8. Default bend K Factor - The fraction of material thickness on which the neutral axis lies on a bend. (Default is 0.45.)
   9. Rolled K Factor - The fraction of material thickness on which the neutral axis lies on a section of rolled wall. (Default is 0.5.)
   10. Minimal gap - The smallest gap between the sheet metal edges defining a rip
   11. Corner relief type -
       • Square - Sized

         Flat view: 3D view:

       • Rectangle - Scaled

         Flat view: 3D view:

       • Round - Sized

         Flat view: 3D view:

       • Round - Scaled

         Flat view: 3D view:

       • Closed

         Flat view: 3D view:

       • Simple

         Flat view: 3D view:

   12. Corner relief scale - The scale of the corner opening (for Scaled openings), a value between 1.00 and 2.00.
   13. Corner relief width - The measurement of the width of the corner opening (for Sized openings), in default units or specified units.
   14. Bend relief type - The shape of the bend relief:
       • 矩形 - 縮放

       

       • 圓端 - 縮放

       

       • 撕裂
       ：

       

       • Bend relief depth scale - A value between 1.00 and 5.00. Once you enter a value it becomes the default across all documents.

         A value of 1 results in an obround bend relief perfectly touching the bend and a rectangular bend relief matches the depth of the obround.

         任何超過 1 的值會根據此公式：((深度比例 -1) * 彎折半徑)。

       • Bend relief width scale - A value between 0.0625 and 2.00. The width of the bend relief is calculated via the formula: thickness * width scale. Once you enter a value it becomes the default across all documents.
7. Tap to accept the feature; the Sheet metal model is listed in the Feature list.
8. Apply any other specific sheet metal features now. See note below.
9. Tap Finish sheet metal model if you want to continue to add non-sheet metal features to your part.
   1. Tap to close the Sheet metal feature; the Finish sheet metal model feature is listed in the Feature list.

Create a sheet metal model by extruding sketch curves:

1. While in a Part Studio, tap .
2. Select the sheet metal operation Extrude.
3. Select the sketch curves to extrude.
4. Select the End type: Blind, Up to next, Up to face, Up to part, Up to vertex.

5. Symmetric - Select this option, available for Blind end types only, to a specified total distance, half the distance in both directions about the sketch plane.

6. Drag or set the depth.
7. Set the thickness of the sheet metal.
8. Set the inside radius of the bends.
9. Check Flip direction up if you wish to reverse the orientation of the sheet metal model.
10. Select the Bend calculation to determine how the bends are calculated. Options are:
    • K Factor (default) - Uses the ratio of the neutral axis to the material thickness.
    • Bend allowance - Uses the length of the neutral line arc between the tangent points of a bend.
    • Bend deduction - Uses the difference between the sum of the flange lengths (from the edge to the apex) and the initial flat length.

11. Specify the K Factor - The fraction of material thickness on which the neutral axis lies.

12. Set Minimal gap - The smallest gap between sheet metal edges.
13. Corner relief type:
    • Square - Sized

      Flat view: 3D view:

    • Rectangle - Scaled

      Flat view: 3D view:

    • Round - Sized

      Flat view: 3D view:

    • Round - Scaled

      Flat view: 3D view:

    • Closed

      Flat view: 3D view:

    • Simple

      Flat view: 3D view:

14. Corner relief scale - The scale of the corner opening (for Scaled corners); a value between 1.00 and 2.00.
15. Bend relief type - The shape of the bend relief:
    • Rectangle - Scaled:

    

    • Obround - Scaled:

    

    • Tear:

    

16. Bend relief depth scale - Between 1.00 and 2.00
17. Bend relief width scale - A value between 0.0625 and 2.00
18. Tap to accept the feature; the Sheet metal model is listed in the Feature list.
19. Apply any other specific sheet metal features now. See note below.
20. Tap Finish sheet metal model if you want to continue to add non-sheet metal features to your part.

You may decide to extrude an arc as a bend, however, by selecting the arc while the "Arcs to extrude as bends" field is active.

This results in the selected arc (or arcs) being made into bends (instead of tangent joints).

Create a sheet metal model by thickening faces, surfaces or sketch regions:

1. While in a Part Studio, tap .
2. Select the type of sheet metal operation: Thicken
3. Select sketch regions, planar surfaces or faces of a part.
4. Select the edges to create bends; edges not selected are made into rips or, in the case of arcs and splines, are made into tangent joints.
5. Specify applicable options:
   1. Clearance from input - The relative offset between the sheet metal and the part selected to be enclosed by the sheet metal
   2. Clearance includes bends - Check to include the clearance for bends
   3. Thickness - The thickness of the sheet metal
   4. Bend radius - The inside radius of the bends created
   5. Flip direction up - Reverses the orientation of the sheet metal model. This is useful when defining whether bends are up or down, relative to the model.
   6. Bend calculation - Determines how the bends are calculated. Options are:
      • K Factor (default) - Uses the ratio of the neutral axis to the material thickness.
      • Bend allowance - Uses the length of the neutral line arc between the tangent points of a bend.
      • Bend deduction - Uses the difference between the sum of the flange lengths (from the edge to the apex) and the initial flat length.
   7. Default bend K Factor - The fraction of material thickness on which the neutral axis lies. (Default is 0.45.)

   8. Rolled K Factor - The fraction of material thickness on which the neutral axis lies on a section of rolled wall. (Default is 0.5.)

   9. Minimal gap - The smallest gap between sheet metal edges
   10. Corner relief type - The shape of the corner relief:
       • Square - Sized

         Flat view: 3D view:

       • Rectangle - Scaled

         Flat view: 3D view:

       • Round - Sized

         Flat view: 3D view:

       • Round - Scaled

         Flat view: 3D view:

       • Closed

         Flat view: 3D view:

       • Simple

         Flat view: 3D view:

   11. Corner relief scale - The scale of the corner opening (for Scaled corners); a value between 1.00 and 2.00.
   12. Bend relief type:
       • Rectangle:

       

       • Obround:

       

       • Tear:

       

   13. Bend relief depth scale - Between 1.00 and 2.00.
   14. Bend relief width scale - Between 0.0625 and 2.00.
6. Tap to accept the feature; the Sheet metal model is listed in the Feature list.
7. Apply any other specific sheet metal features now. See note below.
8. Tap Finish sheet metal model if you want to continue to add non-sheet metal features to your part.
9. Tap to close the Sheet metal model feature; the Finish sheet metal model feature is listed in the Feature list.

You may decide to thicken an arc as a bend, however, by selecting the arc while the "Arcs to extrude as bends" field is active.

This results in the selected arc (or arcs) being made into bends (instead of tangent joints).

Only a subset of available features can be added to active sheet metal models (Extrude > Remove, Move face, Boolean, and Hole for example). All features are represented in the feature list, the model in the graphics area, the sheet metal table, and the flat pattern. For example, you can Extrude > Remove a sketch to create an opening in an active sheet metal model. The resulting opening’s sides are always perpendicular to the wall it pierces.

Other Extrude options that modify the model such as Add or Intersect are not allowed until the model is deactivated using the Finish sheet metal model tool.

Keep in mind that subsequent features modifying a deactivated sheet metal model act on the part as they would any non-sheet metal part, and do not affect the flat pattern or table values.

Use Fillet and Chamfer to soften sheet metal edges, if necessary. Be aware that selecting a sheet metal edge must be done at the very corner and not an adjacent edge. Note that advanced Fillet and Chamfer features (conic fillet for example) are not available on sheet metal at this time.

Onshape retains the original construction edge despite a fillet or chamfer and uses that construction edge for future features. For example, creating a flange on a filleted edge ignores the fillet and creates the flange along the original edge. You may use the Move face tool to move the edge of the flange back to the edge of the fillet if desired:

Fillet a corner:

Create a flange:

Use Move face to move the edge of the flange:

Re-fillet the corner:

You have the ability to pattern sheet metal faces and flanges using the Face parameter of the patterning tools (Linear pattern, Circular pattern, and Curve pattern) as well as mirroring sheet metal faces and flanges. The tools function normally, just make sure to select "Face" as the Pattern type, or to select a face when mirroring.

When a sheet metal model is active (in the process of being created or edited), additional tools are available:

• 凸緣 - 為每條所選的邊線建立牆面，使用彎折來連接所選的邊線。
• 摺邊 - 在現有的鈑金零件上為所選取的邊線/面建立摺邊。
• 薄板頁 - 將一個薄板頁加入至鈑金凸緣中。
• Bend - Bend a sheet metal model along a reference line, with additional bend control options.
• 製作接合 - 將兩個牆面的相交處轉換為一個接合特徵，可以是一個彎折 (以圓柱幾何接合牆面)，或是一個裂口 (兩個牆之間的小間隙)。
• 轉角 - 修改轉角類型與止裂比例。
• 彎折止裂 - 修改彎折止裂 (在彎折結束與自由邊線交會處做出的小切除)、深度與止裂寬度。
• Modify joint - Make changes to an existing joint, such as converting a bend to a rip. Currently available through the flat view table.
• Corner break - Break the corner on existing sheet metal parts by applying a fillet or chamfer. Select a corner edge or vertex and specify corner break type and distance. It is recommended to use this feature after all flanges and joints of the Sheet metal model are finalized.
• Sheet metal table and flat view - Open and close the Rip/Bend tables and the visualization of the sheet metal model flat pattern. Use this table to convert rips to bends and vice versa.
• 完成鈑金模型 - 關閉 (停用) 鈑金模型；建立特徵清單中的特徵。