Solution 1: 2-Die 2-Blow Cold Heading Process (Suitable for Simple Structure Parts)
Applicable Equipment: 2-die 2-blow cold heading machine
Blank Specification: Diameter φ12.7mm, Length 67mm
Process Flow: The first station adopts backward extrusion process to precisely process a blind hole of φ8.35mm; the second station completes the head pre-upsetting and synchronously realizes the final forming of the spherical head. The overall process is simple and efficient, suitable for mass production of small and medium-sized fasteners, balancing dimensional accuracy and production efficiency.
Solution 2: 3-Station Cold Heading Process (Suitable for Complex Hollow Structure Parts)
Applicable Equipment: 3-station cold heading machine
Blank Specification: Diameter φ12.5mm, Blank Length 61.8mm
Process Flow: The first station completes the initial diameter reduction and pre-upsets the head blank; the second station performs the secondary diameter reduction and simultaneously extrudes to form the hollow structure of the head; the third station realizes the final forming of the shank and head, ensuring that the ball head diameter is controlled at 22±0.1mm, effectively avoiding dimensional deviation, and suitable for the production of high-strength and high-
Precision Fasteners.
Solution 3: PRM7 4-Station Cold Heading Process (300 Ton Forging Force)
Applicable Equipment: PRM Series 4-station cold heading machine (forging force 300 tons)
Process Flow: The first station adopts conical extrusion process to complete diameter reduction and local upsetting synchronously, laying the foundation for subsequent forming; the second station pre-upsets the head to optimize material flow; the third station performs final head upsetting to ensure forming accuracy; the fourth station performs trimming treatment to remove excess flash on the head, ensuring neat product appearance and uniform dimensions, suitable for the production of high-demand fasteners.
Solution 4: General 4-Station Cold Heading Process (Suitable for Conventional Fasteners)
Applicable Equipment: General 4-station cold heading machine
Process Flow: The first station completes the shank diameter reduction pretreatment to determine the material flow direction; the second station pre-upsets the head to initially shape the product contour; the third station deepens the head forming to optimize dimensional accuracy; the fourth station completes the final forming to produce qualified finished products, suitable for the production of various standard and non-standard fasteners, balancing efficiency and quality.
In summary, the four process solutions cover different equipment types and blank specifications, which can be flexibly adjusted according to product material and structural requirements. They are suitable for mass production of various fasteners, effectively improving production efficiency, ensuring product accuracy, and meeting production needs in different scenarios.
