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2482results about "Press ram" patented technology

Multi-point forming device for plate

The invention relates to a multi-point forming device for a plate. The device comprises a die carrier, a plurality of upper pressure head pressurizing units and a plurality of lower pressure head supporting units, wherein the plurality of upper pressure head pressurizing units are arranged on an upper flat plate of the die carrier; the plurality of lower pressure head supporting units are arranged on a lower flat plate of the die carrier; each upper pressure head pressurizing unit consists of an upper pressure head, a spring and a travel adjusting component; an upper pressure head is arrangedin a positioning hole on the upper flat plate of the die carrier, and can move up and down along the axis of the hole; the spring is arranged between the upper pressure head and the upper flat plate of the die carrier; each lower pressure head supporting unit consists of a lower pressure head, a plunger and a hydraulic cylinder; the hydraulic cylinder is fixed on the lower flat plate of the die carrier; and the plunger is connected with the lower pressure head. A forming curved surface can be formed optionally and is easy and convenient to adjust. Any element is not required to be adjusted inreal time in a forming process, and stable and uniform normal pressure always acts on the plate, so that effective normal constraint is formed and the plate can be effectively prevented from wrinkling. The device has a reasonable structure, is easy to operate, works reliably, and is an ideal multi-point forming device for the plate.
Owner:HARBIN INST OF TECH AT WEIHAI

Magnetorheological fluid flexible die forming device and magnetorheological fluid flexible die forming method for plates

The invention relates to a plate forming device and a plate forming method, in particular to a magnetorheological fluid flexible die forming device and a magnetorheological fluid flexible die forming method for plates, which aims to solve the problem that existing hydraulic forming, semisolid viscous medium pressure forming and polyurethane rubber forming are suitable for certain plate forming range respectively and advantages of the three cannot be combined in a plate forming process. The forming device comprises a first magnetorheological fluid injection cylinder, a second magnetorheological fluid injection cylinder, a magnetorheological fluid container, magnetorheological fluids, solenoids, a die, a side pressing cylinder, a third magnetorheological fluid injection cylinder and a fourth magnetorheological fluid injection cylinder. During the forming process, the first magnetorheological fluid injection cylinder and the second magnetorheological fluid injection cylinder injects the magnetorheological fluids into a first cavity, magnetic field intensity of the magnetorheological fluids region is changed through regulating electricity, and then shapes needed of the plates to be formed can be formed. The magnetorheological fluid flexible die forming device and the magnetorheological fluid flexible die forming method for plates are applicable to the field of plate forming.
Owner:HARBIN INST OF TECH

Multifunctional hydraulic machine

InactiveCN102744900ASmall structureNo waste of energy consumptionPress ramMaster cylinderEngineering
The invention relates to a multifunctional hydraulic machine which comprises a vertical column, a side pressing sliding block and a side pressing cylinder, wherein the side pressing sliding block is assembled on the vertical column in a guide sliding mode, and the side pressing cylinder drives the side pressing sliding block to vertically move along the vertical column. An upper transverse beam is fixedly arranged on the hydraulic machine and above the side pressing sliding block. The side pressing cylinder comprises a side pressing cylinder body fixedly arranged on the upper transverse beam and a side pressing cylinder piston fixedly arranged on the side pressing sliding block. A main cylinder is arranged on the upper transverse beam and comprises a main cylinder body fixedly arranged the upper transverse beam and a main cylinder piston for installing a corresponding upper pressing head. The side pressing sliding block is provided with an upper through hole which penetrates through the upper end face and the lower end face of the side pressing sliding block to enable the upper pressing head installed on the main cylinder piston to penetrate through. The multifunctional hydraulic machine solves the problem that energy waste is caused due to the fact that the side pressing cylinder exerts reacting force on the main cylinder when the existing hydraulic machine performs forming operation.
Owner:HENAN UNIV OF SCI & TECH

Oil cylinder and connecting rod drive system for compounded transmission hydraulic machine

An oil cylinder and connecting rod drive system for a compounded transmission hydraulic machine comprises a symmetric connecting rod force amplifier and a hydraulic machine oil cylinder. The symmetric connecting rod force amplifier is composed of four connecting rod mechanisms in two symmetric groups on the left side and the right side. Each connecting rod mechanism is composed of a toggle rod, a toggle pin, a force exerting rod, a force exerting pin, a drive rod, a drive pin and a hinge pin, wherein the toggle rod is connected with an upper cross beam of the hydraulic machine through the toggle pin, the drive rod is connected with a small slide rest of the hydraulic machine through the drive pin, the force exerting rod is connected with a slide block of the hydraulic machine through the force exerting pin, the toggle rod, the drive rod and the force exerting rod are connected through the hinge pin, the slide block of the hydraulic machine is driven by the hydraulic machine oil cylinder, and reciprocating movement of the hydraulic machine is achieved. The oil cylinder and connecting rod drive system for the compounded transmission hydraulic machine has the advantages that the drive system is compact in structure and high in efficiency, the radial component force is balanced by adoption of the symmetric connecting rod mechanisms and connecting rod small slide rest guide pillars, an eccentric load in the operating process of the hydraulic machine can be effectively overcome, the high precision of the slide block is maintained, and the installed capacity is decreased.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
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