Bending Square Bar and Square Bar Bending Machine

Square bars can only be bent as one style (i.e. there is no strong axis or weak axis to bend against). BIT Series Profile Bending Machine can ability to bend all mill produces sizes of square and round bars.

Square Bar

Bars are most commonly used for smaller manufactured parts and for industrial applications.

Bars can be bent with virtually every bending process we have available with our section bending machine. For very tight radius bending you can utilize a draw bending process where you must pull the material (draw the material) around a bend die matching the desired bend radius.

6 important factors affecting the square bar bending process

Several tips can help to ease the bending of square or rectangular material and reduce the amount of distortion in bent sections.

• Wall Thickness: Bending round, square, or rectangular material involves stretching the outside diameter (OD) of the bend and compressing its ID. Consequently, a heavier wall thickness allows for a tighter bend radius and more material stretchability with less distortion.
• Method of Bending: This is a key factor in controlling distortion. A correctly chosen procedure can help to produce consistent tolerances and accurate parts. Generally, smaller material requires rotary draw bending or compression bending, which can incorporate wiper dies and mandrels. Induction and increment bending should be used with larger material bent to a larger radius. Design distortion and material size are important factors for determining the bending method.
• In many cases: There is no better factor than experience. Many trained bending artisans know what is required to produce an acceptable product.
• Size of Material: Larger material bent to a smaller radius has a greater chance to distort than smaller material bent to a larger radius. Design and planning are necessary to help solve bending problems before they arise.
• Tooling: After the parts have been designed, the method of bending has been chosen, and procedures to bend to proper tolerances are established, the machine must be set up with the proper tooling. Based on design conditions, tooling that can be used includes bend die, clamp block, follower block, mandrel, and wiper die. All or some of this tooling may be required.
• Internal and External Lubricant: Lubricants decrease the friction between tooling and material to be bent. When friction is reduced, material flows smoothly through the bending equipment, allowing the machinery to perform its designed operation efficiently.