05. Sheet Metal Corners.pptx

SHEET METAL SHEET METAL CORNERS

Content :

SHEET METAL WORKFLOW ESTABLISH BASIC PARTCHARACTERISTICS DEFINE THE BASIC SHAPE OF THE PART CONSTRUCTING BASE FEATURES SHEET METAL CORNERS SHEET METAL CUTOUTS SHEET METAL DEFORM FEATURES FLAT SOLID AND FLAT PATTERN ADVANCED SHEET METAL COMMANDS ANALYZE FORMABILITY – ONE STEP AEROSPACE SHEET METAL WORKING WITH NON-SHEETMETAL DATA

SHEET METAL CORNERS Purpose

• This lesson introduces you to the different types of corner treatments.

Objectives

• Upon completion of this lesson, you will be able to: • Identify the key elements and conditions required to create closed and three-bend corners. You will also learn how to round or chamfer sharp corners. • Become familiar with the corner relief options available. • Use the different types of corner treatments.

Closed Corner • Use the Closed Corner command to close the corner where two flanges meet. During flattening, the corner and relief geometry are made appropriate for a flat pattern. • When you use the Closed Corner command, you can create:

• Mitered closed corners on bends that have unequal bend radii or bend angles.

Closed Corner • Overlapping webs with mitered corners. This is applicable for the Close and Relief type of Closed Corner feature.

• Corners between flanges that bend in opposite directions.

• Corners between a wide range of corner angles. The example shows closed corners where all the corner angles have different values.

Closed Corner • Mitered closed corners with a smooth transition from the miter to the cutout edges for the Circular Cutout, U Cutout, V Cutout, or Rectangular Cutout type of corner treatment options.

• This smooth transition ensures that any jerks or jitters while tracing the tool path are avoided. • Reliefs without creating a corner.

• As a best practice, apply bend and corner relief elements before you create a Closed Corner. This allows you to start with a clean corner.

Closed Corner dialog box

Closed Corner • Type Close and Relief Closes the corner so that the edges of the flanges meet or have a narrow gap. • Relief Trims the adjoining flanges according to the shape of the relief. • Bends to Close Select Adjacent Bends lets you select the bends that meet at the corner you want to close. The bends must share the same edge, but can bend in opposite directions. The bends can have different angles, or radii. Treatment specifies the relief and its shape. • Corner Properties These illustrations show corner relief with no offset

Closed Corner Open

Circular Cutout

V Cutout

Closed

U Cutout

Rectangular Cutout

Closed Corner • Overlap

Closed Overlapping

Brings the inside edges of the corner together. Extends one edge. You can specify the extent of overlap in the Overlap Ratio box. The overlap ratio must be between the range 0<=1. The following example shows an overlap ratio of 1 and a gap of 1 mm.

The order in which you pick the flanges controls their relative positions. The second bend you pick will be the one on top.

Closed Corner • Gap Specifies the amount of gap between the edges. It is the distance between the intersection of inner flange faces and the flange side face. The gap cannot be negative or greater than the material thickness.

The figure shows a gap of 1 mm with no overlap. The gap is the distance from the projected intersection of the two flanges back to the original flange. In the following figure, the distance of 0.05, not 0.07, would be entered to get the displayed gap.

Closed Corner • Miter Corner Available when Type is set to Close and Relief and Treatment is set to Closed, Circular Cutout, U Cutout, V Cutout, or Rectangular Cutout. Removes bumps or burrs in corners and creates a gap so that it is possible to create the cut in the flat state of the solid.

• Blend Miter

Available when Type is set to Close and Relief and Treatment is set to Circular Cutout, U Cutout, V Cutout, or Rectangular Cutout. Creates a smooth transition from the miter to the cutout edges for these types of corner treatment options.This smooth transition ensures that any jerks or jitters are avoided while tracing the tool path.

Closed Corner • Overlap Ratio

Appears when Overlap is set to Overlapping. Specifies the amount of overlap, which must be greater than 0 and no more than 1.

Closed Corner • Relief Properties Origin specifies the location of the relief's center point. Bend Center Locates the center point at the intersection of the bisection of the corner angle between the two bends and the centerline of the first bend you picked. Corner Point Locates the center point at the intersection of the inner bend lines.

Closed Corner • Diameter Specifies the diameter of the cutout. The Legend illustrates how the diameter is measured for each relief type. • Offset

Specifies an offset from the origin of the cutout. No offset

• Angle 1, Angle 2

Offset = 10

Offset = – 5

Appears when Treatment is set to V Cutout. Specifies the angles of the sides of the V measured from the bisection of the corner angle between the two bends.

Closed Corner • Length, Width Appears when Treatment is set to Rectangular Cutout. Specifies the length and width of the sides of the rectangle.

• Legend

Illustrates the relief shape and parameters for each type.

Three Bend Corner dialog box

Three Bend Corner dialog box • Bends to Close

Select Adjacent Bends lets you select the bend faces adjacent to the corner.

• Corner Properties Treatment specifies the way the corner is treated.

Open

Closed

Circular Cutout

• You can specify the diameter of the circular cutout in the Diameter box.

Three Bend Corner dialog box • U Cutout 1 2

• V Cutout

• You can specify the diameter and angles of the V cutout in the Diameter, Angle 1, and Angle 2 boxes.

Origin Diameter

Summary: Sheet Metal corners • Corner treatments help complete your design. In this lesson you: • Identified the key elements and conditions required to create two different types of sheet metal corners. • Learned how to remove sharp corners from your part. • Became familiar with the corner dialog boxes. • Used different types of corner treatments.