Back to results
US 2021/0260844 A1Published application
Pressing method and method of manufacturing mechanical apparatus
AssigneeNsk Ltd.
InventorNobuyuki HAGIWARA
Life of this patent
Estimating the term…
Abstract
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.
Claims8
A pressing method that is a method of performing pressing on a workpiece using a press machine including:
- a frame having a reference axis,
- a first die supported by the frame,
- a second die supported by the frame so as to enable retreating and approaching movement with respect to the first die in an axial direction of the reference axis, and
- a hydraulic cylinder configured to generate a force in a direction in which the second die approaches the first die,
- the pressing method comprising:
- performing the pressing on the workpiece between the first die and the second die by causing the second die to approach the first die by pressing the second die against the first die using the hydraulic cylinder in a state in which the workpiece is disposed between the first die and the second die, the workpiece having a workpiece center axis and having a rotationally symmetric shape about the workpiece center axis, and
- performing the pressing on the workpiece in a state in which a shape of each of the frame, the first die and the second die has a rotationally symmetric shape about the reference axis and in which the workpiece center axis coincides with the reference axis.
4 more elements
A pressing method that is a method of performing pressing on a workpiece using a press machine including:
- a frame having a reference axis,
- a first die supported by the frame,
- a second die supported by the frame so as to enable retreating and approaching movement with respect to the first die in an axial direction of the reference axis, and
- a hydraulic cylinder configured to generate a force in a direction in which the second die approaches the first die,
- the pressing method comprising:
- performing the pressing on the workpiece between the first die and the second die by causing the second die to approach the first die by pressing the second die against the first die using the hydraulic cylinder in a state in which the workpiece is disposed between the first die and the second die, the workpiece having a rotationally asymmetric shape when seen in an axial direction of the reference axis,
- performing a radial direction positioning process that performs a test to obtain a relationship between positions of the first die and the second die in a radial direction about the reference axis when the pressing is performed on the workpiece and a relative inclination amount between the first die and the second die generated when the pressing is performed on the workpiece and that determines one position in the radial direction in which the inclination amount becomes equal to or smaller than a predetermined value by using the relationship, and
- performing a pressing process that performs the pressing on the workpiece in a state in which the first die and the second die are disposed at the one position in the radial direction which was determined in the radial direction positioning process.
5 more elements
A pressing method that is a method of performing pressing on a workpiece using a press machine including:
- a frame having a reference axis,
- a first die supported by the frame,
- a second die supported by the frame so as to enable retreating and approaching movement with respect to the first die in an axial direction of the reference axis, and
- a link mechanism including a driving source, a first link member rotatably driven by the driving source and a second link member that is provided with one end portion thereof being rotatably supported by a portion of the first link member which is deviated in the radial direction from a rotation center axis of the first link member and that is provided with other end portion thereof being rotatably supported by the second die,
- the pressing method comprising:
- performing the pressing on the workpiece between the first die and the second die by causing the second die to approach the first die by pressing the second die against the first die using the link mechanism in a state in which the workpiece is disposed between the first die and the second die, and,
- performing a radial direction positioning process that performs a test to obtain a relationship between positions of the first die and the second die in the radial direction about the reference axis when the pressing is performed on the workpiece and a relative inclination amount between the first die and the second die generated when the pressing is performed on the workpiece and that determines one position in the radial direction in which the inclination amount becomes equal to or smaller than a predetermined value by using the relationship, and
- performing a pressing process that performs the pressing on the workpiece in a state in which the first die and the second die are disposed at the one position in the radial direction which was determined in the radial direction positioning process.
5 more elements
Dependencies are inferred from the claim text.