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.

One of the final steps in sheet metal design involves breaking sharp corners to prevent injuries and snags. Onshape’s Sheet metal corner break feature accomplishes this by adding a fillet or chamfer to any selected corners.

Reserve Corner breaks for the final features of a Sheet metal part. Once a Corner break feature is applied, the Joint type and Style cannot be modified.

Corner breaks apply to any corner in a sheet metal part, even those created due to Bend relief cuts.

Start a new Corner break feature. Select either the Fillet or Chamfer tab, then select one or more corner edges or vertices of a sheet metal part. The corners can be selected in the formed or flattened state.

For a Fillet, select either Radius or Width for the Measurement. Additionally, set the Control option for the fillet to either Distance, Conic, or Curvature.

Set the radius or width value to dimension the fillet. For a conic-based fillet, set the Rho value. For a curvature-based fillet, set the Magnitude.

For a fillet consisting of two radii blending together, check Asymmetric and enter the Second radius. Toggle the Flip asymmetric arrows when necessary.

Both Distance and Conic have an option to Allow edge overflow. Checking this option allows the fillet feature to modify the edges on the face created by the fillet, leading to a smooth, continuous surface. When you do not check this option, Onshape preserves the edges on the filleted face.

For a Chamfer, set the Measurement to Offset or Tangent. Then, select a Chamfer type. Equal distance extends the chamfer an equal distance from the edge in both directions. Two distances extends the chamfer by each distance value entered. Distance and angle extends the chamfer a specified distance in one direction and a specified angle in the other. With both these options, you can toggle the Opposite direction arrow to switch the side.

To create a filleted corner break on a sheet metal model:

  1. While in a Part Studio with an existing sheet metal model, click Corner break ().

    Corner break dialog: Fillet

  2. Select Fillet for the corner break type.
  3. Select a corner edge or vertex on the sheet metal model in the graphics area. A corner edge or vertex can also be selected in the flat view section of the Sheet metal model and flat view.
  4. 選擇測量的類型，可以是：
    1. Radius - Specify the radial measurement of the fillet.
    2. Width - Specify the distance between the two ends of the fillet (a constant width).
  5. 選擇一個「控制項」類型：
    • Distance - Fillet has a circular edge with the radius value entered. Onshape remembers this value when creating new fillets.
    • Conic - Fillet has a conical edge with the radius value you enter and optionally a Rho value to define the style of the fillet:

      Conic Rho examples

      Rho values: 0.25 (left; elliptical curve): 0.5 (middle; parabolic curve); 0.999 (right; hyperbolic curve - zoomed in)

    • Curvature - Fillet matches the curvature of the surrounding edges with a radius value you enter and optionally a Magnitude value between 0 and .999 to adjust the tangency. Turn Zebra stripes on (from the Show analysis tools menu) to see the tangency more clearly:

      顯示分析工具功能表，其中強調顯示「斑馬條紋」

    當輸入半徑值時，您也可以使用拖曳操控器 (在下圖中以箭頭表示) 來視覺呈現圓角並達到所要的預估值：

    Using the drag manipulator

    Onshape remembers the selection for Measurement type and value and opens the dialog with the last selected option in subsequent operations.

  6. Check Asymmetric and enter a Second radius to have a different fillet edge radius value on one end of the filleted edge. Click the Flip asymmetric arrow to use the other end of the fillet as the second (asymmetrical) fillet edge.
  7. By default, Allow edge overflow is disabled. Check to allow the tangent edges to be 'deleted' from the fillet surface, if necessary. The edges that are generated by default strictly constrain the direction of the fillet along the fillet edges. When Allow edge overflow is enabled, the fillet can modify edges on the face created by the fillet to make a smooth, continuous surface. When the option is unchecked, the edges on the filleted face are preserved, resulting in a more free-flowing part.

    Click the Allow edge overflow dropdown to open a field where you can select edges to keep.

  8. Click the checkmark (接受核取記號圖示) to accept the new Corner break feature.

To create a chamfered corner break on a sheet metal model:

  1. While in a Part Studio with an existing sheet metal model, click Corner break ().

    Corner break dialog: Chamfer

  2. Select Chamfer for the corner break type.
  3. Select a corner edge or vertex on the sheet metal model in the graphics area. A corner edge or vertex can also be selected in the flat view section of the Sheet metal model and flat view.
  4. 選擇測量的類型，可以是：
    1. Offset - Sets the distance entered in the Distance field from the starting edge to the chamfer. This option is edge dependent; computation starts at the first selection and then progresses through the chain.
    2. Tangent - Sets the distance entered in the Distance field from the intersection of the tangent of the two adjacent faces to the chamfer. This option is NOT edge dependent.
  5. Select a Chamfer type:
    • 同等距離 - 倒角會從邊線往兩個方線延伸同等的距離。
    • 兩個距離 - 倒角會在每個方向上延伸不同的距離。
    • 距離和角度 - 倒角會在一個方向上延伸指定的距離，在另一個方向上延伸指定的角度。

      Onshape remembers the selection for the Chamfer type and opens the dialog with the last selected option in subsequent operations.

  6. Enter the Distance(s) for the chamfer. Onshape defaults to 45 degrees for the angle, but remembers the last inputted distance value for Equal distance and Distance and angle chamfers.
  7. If you selected Two distances or Distance and angle, click the arrow button to flip the direction of all edges, or specify individual edges to flip in the Direction overrides field.
  8. Click the checkmark (接受核取記號圖示) to accept the new Corner break feature.

  • After a Corner break feature is applied, all model Joints' Type (Rip or Bend) and Style (Edge joint or Butt joint) are no longer editable in the Sheet metal table and flat view. It is recommended to add any Corner break features after finalizing all edits to the Sheet metal model's flanges and joints.

    鈑金表格與展開視圖中尖角倒鈍之前與之後的範例

    套用「尖角倒鈍」特徵之前 (上圖)；套用「尖角倒鈍」特徵之後 (下圖)

  • You can use Corner break to apply fillets or chamfers to Bend relief edges and vertices, in addition to corners:

    Applying a Corner break to a bend relief edges and vertices

  • You cannot add multiple fillets, chamfers, or a combination of both on corners using a single Corner break feature. Create an additional Corner break feature to add an additional fillet or chamfer to any vertex or edge of a previously-existing Corner break feature:

    Corner break example applying a Fillet to a chamfered edge

    Fillet applied to a chamfered edge using a second Corner break feature

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」圖示凸緣 - 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」圖示摺邊 - 在現有的鈑金零件上為所選取的邊線/面建立摺邊。
  • tab icon薄板頁 - 將一個薄板頁加入至鈑金凸緣中。
  • 鈑金彎折按鈕Bend - Bend a sheet metal model along a reference line, with additional bend control options.
  • Form - Create form features on existing sheet metal models. Forms can be selected from the current document, other documents, or a predefined library of sheet metal forms.
  • Make joint icon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)。
  • 「角落」圖示轉角 - 修改轉角類型與止裂比例。
  • Bend relief icon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 iconModify 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.
  • 「鈑金表格與展開視圖」圖示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」圖示 完成鈑金模型 - 關閉 (停用) 鈑金模型；建立特徵清單中的特徵。

To create a filleted corner break on a sheet metal model:

  1. While in a Part Studio with an existing sheet metal model, tap Corner break ().

    iOS Corner break dialog: FilletAndroid Corner break dialog: Fillet

    Corner break: Fillet dialog for iOS (first image above) and Android (second image above)

  2. Tap Fillet for the corner break type.
  3. Select a corner edge or vertex on the sheet metal model in the graphics area.
  4. 選擇測量的類型，可以是：
    1. Radius - Specify the radial measurement of the fillet.
    2. Width - Specify the distance between the two ends of the fillet (a constant width).
  5. Select a Control type:
    • Distance - Fillet has a circular edge with the radius value entered. Onshape remembers this value when creating new fillets.
    • Conic - Fillet has a conical edge with the radius value you enter and optionally a Rho value to define the style of the fillet:

      Conic Rho examples

      Rho values: 0.25 (left; elliptical curve): 0.5 (middle; parabolic curve); 0.999 (right; hyperbolic curve - zoomed in)

    • Curvature - Fillet matches the curvature of the surrounding edges with a radius value you enter and optionally a Magnitude value between 0 and .999 to adjust the tangency.

    當輸入半徑值時，您也可以使用拖曳操控器 (在下圖中以箭頭表示) 來視覺呈現圓角並達到所要的預估值：

    Corner break drag manipulator

  6. Toggle Asymmetric on and enter a Second radius to have a different fillet edge radius value on one end of the filleted edge. Toggle the Flip asymmetric arrow to use the other end of the fillet as the second (asymmetrical) fillet edge.
  7. By default, Allow edge overflow is toggled off. Toggle this option on to allow the tangent edges to be 'deleted' from the fillet surface, if necessary. The edges that are generated by default strictly constrain the direction of the fillet along the fillet edges. When Allow edge overflow is enabled, the fillet can modify edges on the face created by the fillet to make a smooth, continuous surface. When the option is toggled off, the edges on the filleted face are preserved, resulting in a more free-flowing part.

    Tap the Edges to keep field and select any edges to keep in the graphics area.

  8. Tap the checkmark to accept the new Corner break feature.

To create a chamfered corner break on a sheet metal model:

  1. While in a Part Studio with an existing sheet metal model, tap Corner break ().

    iOS Corner break dialog: ChamferAndroid Corner break dialog: Chamfer

    Corner break: Chamfer dialog for iOS (first image above) and Android (second image above)

  2. Tap Chamfer for the corner break type.
  3. Select a corner edge or vertex on the sheet metal model in the graphics area.
  4. 選擇測量的類型，可以是：
    1. Offset - Sets the distance entered in the Distance field from the starting edge to the chamfer. This option is edge dependent; computation starts at the first selection and then progresses through the chain.
    2. Tangent - Sets the distance entered in the Distance field from the intersection of the tangent of the two adjacent faces to the chamfer. This option is NOT edge dependent.
  5. Select a Chamfer type:
    • 同等距離 - 倒角會從邊線往兩個方線延伸同等的距離。
    • 兩個距離 - 倒角會在每個方向上延伸不同的距離。
    • 距離和角度 - 倒角會在一個方向上延伸指定的距離，在另一個方向上延伸指定的角度。
  6. Enter the Distance(s) for the chamfer. Onshape defaults to 45 degrees for the angle, but remembers the last inputted distance value for Equal distance and Distance and angle chamfers.
  7. If you selected Two distances or Distance and angle, tap the arrow button to flip the direction of all edges, or specify individual edges to flip in the Direction overrides field.
  8. Tap the checkmark to accept the new Corner break feature.

  • After a Corner break feature is applied, all model Joints' Type (Rip or Bend) and Style (Edge joint or Butt joint) are no longer editable in the Sheet metal table and flat view. It is recommended to add any Corner break features after finalizing all edits to the Sheet metal model's flanges and joints.

  • You can use Corner break to apply fillets or chamfers to Bend relief edges and vertices, in addition to corners:

    Applying a Corner break to a bend relief edges and vertices

  • You cannot add multiple fillets, chamfers, or a combination of both on corners using a single Corner break feature. Create an additional Corner break feature to add an additional fillet or chamfer to any vertex or edge of a previously-existing Corner break feature:

    Corner break example applying a Fillet to a chamfered edge

    Fillet applied to a chamfered edge using a second Corner break feature

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」圖示凸緣 - 為每條所選的邊線建立牆面，使用彎折來連接所選的邊線。
  • Tab icon薄板頁 - 將一個薄板頁加入至鈑金凸緣中。
  • Make joint icon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)。
  • 「角落」圖示轉角 - 修改轉角類型與止裂比例。
  • Bend relief icon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。
  • 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.
  • 「完成鈑金模型」圖示 完成鈑金模型 - 關閉 (停用) 鈑金模型；建立特徵清單中的特徵。