Flashing precise planning and cutting hydropress

Abstract

The invention relates to a flash precise slicing hydraulic press used for the punching shear of a forging flash. The equipment combines a linear driving mechanism, a blank holding mechanism, a back pressure mechanism and a buffer device into novel special punching shear equipment. By adopting the linear unidirectional driving type of the equipment, a workpiece is only subject to a vertical unidirectional punching shear force, but not subject to a lateral force or an additional torsion in the punching-shear process; owning to the blank holding mechanism, the flash can not be warped in the punching-shear process as the flap edge is subject to a compulsive restraining force; owning to the back pressure mechanism, the forging is supported by a back pressure cylinder in the punching-shear process, and the flexible deformation of the forging is reduced; owning to the buffer device, the impact to the hydraulic system is avoided. The slicing hydraulic press which is provided by the invention can be used for the normal punching shear of the flash of the forging, and is especially suitable for the precise punching shear of the flap edge of the forging; the incision of the forging after punching shear has high precision and good quality. The invention can be suitable for all the enterprises which produce forgings.

Description

Technical field [0001] The invention relates to a punching hydraulic press suitable for precision punching and flashing of forgings in the forging industry. Background technique [0002] At present, in the forging industry, there is no special equipment for punching the flash of forgings. Generally, closed single-point (double-point) crank presses, screw presses or ordinary hydraulic presses are used for punching the flashes of forgings. [0003] None of the above-mentioned punching equipment has a blank-holding mechanism and a back-pressure mechanism. As we all know, if there is no blank-holding mechanism, the flash is easy to warp during the punching process, resulting in a decrease in the quality of the forging and a decrease in the service life of the die; if Without a back pressure mechanism, the forging is in a suspended state during the punching process, which is prone to bending deformation, resulting in a decrease in the precision of the forging. [0004] In additi...

AI Technical Summary

Problems solved by technology

[0003] None of the above-mentioned punching equipment has a blank-holding mechanism and a back-pressure mechanism. As we all know, if there is no blank-holding mechanism, the flash is easy to warp during the punching process, resulting in a decrease in the quality of the forging and a decrease in the service life of the die; if Without a back pressure mechanism, the forging is in a suspended state during the punching process, which is prone to bending deformation, resulting in a decrease in the precision of the forging

[0004] In addition, the working actuators of the closed single-point press and the screw press determine that these two devices are not suitable for punching the flash of forgings, especially for precision punching of flashes of forgings

We know that since the closed single-point press adopts the crank linkage mechanism to transmit power, when punching the flash, the workpiece is not only subjected to the punching force perpendicular to the flash, but also to the transverse force parallel to the flash, resulting in the incision of the forging Misaligned, rough and uneven; the cutting edge of the die wears quickly in the direction of the lateral force and has a low life

Because the screw press uses the screw nut to pay the actuator to transmit power, when the flash is punched, the workpiece is not only subjected to the punching force perpendicular to the flash, but also the additional torque parallel to the flash, resulting in uneven incision of the forging and die edge Uneven mouth wear and low life

Closed two-point crank press has complex structure and high cost, so it is not easy to popularize and apply

[0005] Due to the influence of flash warping, lateral force and additional torque, and complex structure, the above three types of equipment cannot be applied to precision blanking of forging flash

[0006] Ordinary hydraulic press adopts linear one-way driving mode for the slider, which avoids the defects of lateral force and additional torque generated by closed single-point press and screw press, but the warpage of flash and deformation of forgings are not solved, and ordinary hydraulic press Shock of the hydraulic system due to sudden load reduction at the end of punching

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