After the pressure setting and assembly balance cylinder are assembled, the pressure test should be 1.5MPa, no leakage at 30min, and the contact ratio of the connecting joint at the end of the tie rod should be no less than 70%. The pressure setting of the balance cylinder is very important, which can be based on the upper mold. The weight is carried out at the top dead center position. If it is performed at a position other than the top dead center, insufficient pressure setting may result in malfunction. The pressure setting must be reasonable. If the pressure setting is too low, the slider movement may be unstable, the impact at the upper and lower dead points, the brake failure, the upper beam gear noise increase, and the slider stroke indicator indication error may be increased. Increase the main motor and mold height to adjust the temperature rise of the motor; if the pressure setting is too large, it may cause the top dead center overtravel, increase the slider stroke indicator indication error, increase the main motor and the mold height adjustment motor. The phenomenon of temperature rise.
The slider slider is the working part of the press, and is equipped with a device for height adjustment and overload protection. The upper mold in the mold and the mold clamp and the like are fixed thereon, which is a key component for transmitting pressure to the workpiece. The welding slider of the slider is a welded structural member, and is also a first-level appearance member, and the welding unevenness is required to be controlled within 0.5 mm. After the welding is completed, an annealing treatment is performed, and a process hole of 20 mm is opened on each closed cavity before the post-weld annealing, and the process hole is protected when the sandblasting is performed after the heat treatment is completed. At the same time, the slider should be leak tested, and no leakage is allowed.
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