Cold Forging And Stamping Compound Die For Fasteners

Product Details:
Product Name: Cold Forging and Stamping Compound Die for Fasteners
Parameters: 5 stations; capable of producing bolts from M4 to M12, lengths 15–120mm; production rate: 60–100 pieces/min; main die cavity pressure up to 2000 MPa; suitable for SWRCH series cold heading steel wire.
Material: The main die shell is H13 hot work steel, with a shrink-fitted carbide die core. The punches are M42 cobalt-bearing high-speed steel with a nano-TiSiN coating. The cut-off knife is SKH9, and the guide bushes are made of self-lubricating copper alloy.

Process: The wire rod is straightened and cut into blanks. Station 1 performs pre-upsetting, station 2 finishes head upsetting, station 3 cuts the hex or punches a center hole, and subsequent stations handle blanking and prepare for thread rolling. The entire die set is mounted in a multi-station cold header, with forging and stamping synchronized. Pre-stressed rings are used on the die cores to prevent cracking. A precisely metered oil spray system provides cooling and lubrication. All cavities are finished with mirror-finish EDM for high forming accuracy. Finished parts exhibit an unbroken metal flow line, delivering tensile strength 20% higher than machined equivalents. This compound die is perfect for large-scale production of both standard and special-shaped fasteners.