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Technology Information

High Precision Forging
Parts produced by formers are becoming more refined, and net shaping is becoming more prevalent. At Sakamura, a SP Conveyor is being developed to reduce product scarring after being forged.
The XY transfer turns the formed blank (that was extruded and upset in the X direction) vertically at 90° inside the die.
The former has a cutoff system inside of it. One characteristic is that coil and bar material are cut and formed immediately without having intermediate stock. It is also possible to supply slug material.
The refeed system is a complicated, highly-accurate parts forming system. In the former, cutoff, preforming, and piercing occur.
When a former starts running, the die block is heated and thermal expansion of tooling occurs.
Therefore, until a set temperature is reached, variations in the blank’s measurements can be seen.
With the die block temperature adjustment system, a high-powered heater is installed within the die block.
With the individual-type die block, the block at each station is independent, providing a gap.
Because of this, the influence of the heat generated during forging is suppressed from reaching the next station.  
In turn, thermal expansion of the entire die block can be controlled.  This, in conjunction with coolant oil pipes within the die block, creates efficiency.
In a servo former, the ram slide speed and pressurization speed can easily be set by the servo motor.
By utilizing the features of this servo, you can expect the results listed below.
By having an impact gap, the cutter’s initial speed is increased, making the cutting speed two times faster than the usual cutter system. Due to the cutter’s high speed, cutting accuracy can be improved.
Because the stopper is not used in the grip feed system, the stopper is pressed against during cutting and no damage to the stopper occurs.