A workpiece processing apparatus comprises a base member, a slider located above the base member and a punch projecting downward from the slider. The base member is formed with a hydraulic chamber fillable with liquid. The hydraulic chamber has a workpiece processing chamber and a hydraulic-pressure generation chamber which are coupled together. Each of the workpiece processing chamber and the hydraulic-pressure generation chamber extends in the upper-lower direction and opens upward. The base member comprises a piston which is partially received in the hydraulic-pressure generation chamber. When the slider is moved downward, the punch is moved downward and presses the workpiece into the workpiece processing chamber, and the piston receives a downward force and is moved downward. The thus-moved piston increases hydraulic pressure of the liquid.

A workpiece processing apparatus comprises a base member, a slider located above the base member and a punch projecting downward from the slider. The base member is formed with a hydraulic chamber fillable with liquid. The hydraulic chamber has a workpiece processing chamber and a hydraulic-pressure generation chamber which are coupled together. Each of the workpiece processing chamber and the hydraulic-pressure generation chamber extends in the upper-lower direction and opens upward. The base member comprises a piston which is partially received in the hydraulic-pressure generation chamber. When the slider is moved downward, the punch is moved downward and presses the workpiece into the workpiece processing chamber, and the piston receives a downward force and is moved downward. The thus-moved piston increases hydraulic pressure of the liquid.

A method for material forming, by means of a movable impact head and tool combination and a drive unit includes moving the drive unit to provide kinetic energy to the impact head and tool combination, for the impact head and tool combination to strike a work material, so as to form the work material. A return movement of the movable impact head and tool combination, away from the work material, after the strike of the work material by the impact head and tool combination, is dampened.

A method of performing pressing on a workpiece using a press machine. The pressing method includes: performing pressing on the workpiece between a lower die and an upper die by causing the upper die to approach the lower die by using the hydraulic cylinder in a state in which the workpiece is disposed between the lower die and the upper die, and performing the pressing on the workpiece between the lower die and the upper die, in a state in which a shape of each of the frame, the lower die and the upper die has a rotationally symmetric shape about the reference axis and in which the workpiece center axis coincides with the reference axis.

A heavy-duty press is a mechanical machine used for compressing various parts and can be used for forging, molding, blanking, punching, deep drawing and many other applications. The force is generated by the use of hydraulic fluids based on Pascal's principle. The Press With Center Hole Hydraulic Cylinders simplifies the press design by using center hole hydraulic cylinders installed on the mobile platen with the press column inside the center hole. Center hole hydraulic cylinders being connected directly to the column eliminate the need of the third platen. A press with only two platens is cheaper and does not need large pits to be installed in. Also the design of the Press With Center Hole Hydraulic Cylinders use columns made of small section of hexagonal heat-treated steel bars arranged in an array forming a larger column of hexagonal shape. Columns made of small heat-treated bars are stronger, better connected to other press components and are much easier to fabricate and install.

A heavy-duty press is a mechanical machine used for compressing various parts and can be used for forging, molding, blanking, punching, deep drawing and many other applications. The force is generated by the use of hydraulic fluids based on Pascal's principle. The Press With Center Hole Hydraulic Cylinders simplifies the press design by using center hole hydraulic cylinders installed on the mobile platen with the press column inside the center hole. Center hole hydraulic cylinders being connected directly to the column eliminate the need of the third platen. A press with only two platens is cheaper and does not need large pits to be installed in. Also the design of the Press With Center Hole Hydraulic Cylinders use columns made of small section of hexagonal heat-treated steel bars arranged in an array forming a larger column of hexagonal shape. Columns made of small heat-treated bars are stronger, better connected to other press components and are much easier to fabricate and install.

Provided are an efficient energy-saving return cylinder of a hydraulic press and a working method thereof. The efficient energy-saving return cylinder of a hydraulic press comprises a plurality of single-rod return hydraulic cylinders symmetrically distributed at two sides of a main hydraulic cylinder of the hydraulic press, the plurality of single-rod return hydraulic cylinders are divided into several groups, each of the groups consisting of one balancing cylinder and one driving cylinder; a rod chamber of the balancing cylinder is communicated with an accumulator, the pressurized oil in the accumulator is filled into an oil chamber of the balancing cylinder, so that the balancing cylinder balances the weight of a walking beam and a working part of the walking beam; the driving cylinder is differentially connected; in the process of neutral-stroke-rapid-descending and ascending-returning of the walking beam and the working part of the walking beam.

A compressive torsion forming device for processing a processing material using a first die and a second die facing each other includes a sliding portion that includes a first hydraulic chamber, and slides in accordance with a change in internal pressure of the first hydraulic chamber so as to move the first die in a direction of an axis; a rotating table provided with the second die and rotatable about the axis; a table support portion provided opposite to the second die with the rotating table interposed therebetween in the direction of the axis; and a rotational bearing that rotatably supports the rotating table with respect to the table support portion, and receives a force acting on the rotating table in a direction from the second die toward the rotating table.

Provided is a high-efficiency transmission free forging hydraulic press and an operation method thereof. The high-efficiency transmission free forging hydraulic press includes: a hydraulic cylinder, a hydraulic pump, and a pressurization energy storage apparatus. By providing two pressurization energy storage apparatuses between the hydraulic pump and the hydraulic cylinder of the high-efficiency transmission free forging hydraulic press, under the effect of a control system, the two pressurization energy storage apparatuses can alternately provide isobaric pressure oil or pressure oil having undergone pressurization to the hydraulic cylinder of the free forging hydraulic press, such that when the hydraulic pump operates in a status with a relatively low pressure, the hydraulic cylinder in the free forging hydraulic press can constantly obtain the isobaric pressure oil or the pressurization pressure oil, achieving the object of storage of surplus energy and high-efficiency transmission of the hydraulic press.

A method of processing a material by use of high kinetic energy comprises a piston driven from a start position by a hydraulic system pressure by a drive chamber, by only one stroke, to transfer high kinetic energy to a blank/tool to be processed, whereafter there is a risk that a rebound of the piston will occur, so a step is taken in connection with said stroke performed, to prevent said piston from making a rebound with an essential content of kinetic energy to avoid negative effects as a result, whereafter the piston is returned to said start position by means of a second chamber, wherein a valve means closes the driving connection between the system pressure and the piston, the valve means is controlled by a pilot valve controlling the entire striking progress, and the second chamber is pressurized with the system pressure during the entire striking progress.