Chapter 17 Cold Forming Metal Sheet Learning Objectives

Chapter 17 Cold Forming Metal Sheet

Learning Objectives • Identify the two main categories of stamping operations. • Describe various metal cutting techniques and systems. Vereshchagin Dmitry/Shutterstock. com Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Learning Objectives • Explain how shearing, blanking, and piercing operations differ. • Describe common cold forming techniques. Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

CAREER CONNECTION Ironworker • Assemble metal frames that provide structure and support • Learn through 3 - to 4 -year apprenticeships • Mentally and physically able to work at great heights Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Cold Forming Metal Sheet • Cold working • Operations at room temperature • Stamping includes cutting and forming Hamik/Shutterstock. com Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Cutting Operations • Metal cut to size for machining • Few bring material to exact size • Shearing – Brings sheet and plate stock to specified size or shape Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Laser Cutting Systems • Cut through materials of different sizes, thicknesses, and shapes • Superior edge quality, precision, and accuracy Bystronic, Inc. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Plasma Cutting Systems • Electric arc and ionized gases melt and cut • Computer-controlled Vereshchagin Dmitry/Shutterstock. com Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Waterjet Cutting Systems • High-pressure, high-velocity stream of water • Abrasive added for abrasive waterjet cutting • Hydrodynamic machining (HDM) OMAX Corporation Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Blanking, Punching, and Piercing • Punch press with a punch and die • Blanking Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Blanking, Punching, and Piercing • Progressive die has all cutting and forming dies in one die – Stripper plate prevents sticking Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Forming Operations • Forming process uses press and die – Flat metal blanks into three-dimensional shapes – Drawing Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Draw Press Operation • Metal-shaping process on mechanical or hydraulic draw press Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Guerin Process • Forms shallow parts in rubber dies Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Marform Process • Forms deep parts in rubber dies Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Hydroforming • Rubber diaphragm backed up by hydraulic pressure Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Bulging • Entrapped rubber forming • Rubber transmits pressure to expand metal blank or tube against die Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Stretch Forming • Metal blank is pulled from edges • Wraps around form block Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Bending • Press brake bending Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Bending • Tube bending Allegheny Ludlum Steel Corp. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Roll Forming • Series of rollers shape metal strip Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

GREEN METALWORKING Environmentally Friendly Machines • Brush worktables reduce noise levels during operation • High-efficiency components • Computer control optimizes use of materials Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

High Energy Rate Forming • Avoid springback Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

High Energy Rate Forming • Sudden application of large amount of energy • Explosive forming – High-energy pressure pulse from explosive charge Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

High Energy Rate Forming • Electrohydraulic forming – Controlled discharge of electrical energy produces shock wave NASA Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

High Energy Rate Forming • Electromagnetic forming – Insulated induction coil around or within the work – Magnetic field causes work to change shape Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

High Energy Rate Forming • Electromagnetic forming (continued) Goodheart-Willcox Publisher Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.