5.2.4 The Cold Forging Process

Cold forging is one of the most widely used chipless forming processes, often requiring no machining other than drilling. The commonly accepted definition is the forming or forging of a bulk material at room temperature with no heating of the initial slug or inter-stages. The term "no heating" does not include in-process annealing, which may be performed at intermediate stages to relieve the effects of work hardening. The process produces greater dimensional accuracy than hot forming, and does not produce scale. However, the plastic flow characteristics of the workpiece are not as good, so that higher forging pressures are required. Component size is generally limited to 50 pounds or less. The majority of cold forgings weigh less than 10 pounds.

Cold forging is being used in a wide variety of industries including fastener, automotive, pole-line hardware, truck-trailers, outboard engine controls, bicycle pedal cranks, constant velocity joints, universal joint crosses, and military projectile hardware. Shapes generally have been limited to rotationally symmetrical and axisymmetric, including long shafts and struts. Shape capability is being expanded by developments in technology. Some of the most common shapes and combinations of shapes are illustrated below in Section 5.2.4.2.


Return to Table of Contents

array ( '#markup' => '

Cold forging is one of the most widely used chipless forming processes, often requiring no machining other than drilling. The commonly accepted definition is the forming or forging of a bulk material at room temperature with no heating of the initial slug or inter-stages. The term "no heating" does not include in-process annealing, which may be performed at intermediate stages to relieve the effects of work hardening. The process produces greater dimensional accuracy than hot forming, and does not produce scale. However, the plastic flow characteristics of the workpiece are not as good, so that higher forging pressures are required. Component size is generally limited to 50 pounds or less. The majority of cold forgings weigh less than 10 pounds.

Cold forging is being used in a wide variety of industries including fastener, automotive, pole-line hardware, truck-trailers, outboard engine controls, bicycle pedal cranks, constant velocity joints, universal joint crosses, and military projectile hardware. Shapes generally have been limited to rotationally symmetrical and axisymmetric, including long shafts and struts. Shape capability is being expanded by developments in technology. Some of the most common shapes and combinations of shapes are illustrated below in Section 5.2.4.2.


Return to Table of Contents

', '#printed' => true, '#type' => 'markup', '#pre_render' => array ( 0 => 'drupal_pre_render_markup', 1 => 'ctools_dependent_pre_render', ), '#children' => '

Cold forging is one of the most widely used chipless forming processes, often requiring no machining other than drilling. The commonly accepted definition is the forming or forging of a bulk material at room temperature with no heating of the initial slug or inter-stages. The term "no heating" does not include in-process annealing, which may be performed at intermediate stages to relieve the effects of work hardening. The process produces greater dimensional accuracy than hot forming, and does not produce scale. However, the plastic flow characteristics of the workpiece are not as good, so that higher forging pressures are required. Component size is generally limited to 50 pounds or less. The majority of cold forgings weigh less than 10 pounds.

Cold forging is being used in a wide variety of industries including fastener, automotive, pole-line hardware, truck-trailers, outboard engine controls, bicycle pedal cranks, constant velocity joints, universal joint crosses, and military projectile hardware. Shapes generally have been limited to rotationally symmetrical and axisymmetric, including long shafts and struts. Shape capability is being expanded by developments in technology. Some of the most common shapes and combinations of shapes are illustrated below in Section 5.2.4.2.


Return to Table of Contents

', )