There are provided an evaluation method and a prediction method for a technology to be reflected in a press die designing method. A deformation limit evaluation method includes evaluating the deformation limit on a sheared surface of a metal sheet in press-forming the sheared metal sheet. The deformation limit is evaluated and a crack in the sheared surface is predicted based on the relationship between an index value determined from two surface strain distribution gradients of a surface strain distribution gradient in a sheet thickness direction in the sheared surface and a surface strain distribution gradient in a bending ridge line direction by bending in a direction away from the sheared surface at an evaluation position among distributions of strains generated near the boundary between a bending outside surface and the sheared surface of the metal sheet to be bent and a tension generated in the sheared surface.

Disclosed are systems and methods for coupling a first panel to a second panel via a push retainer. The push retainer includes an annular body, flexible tabs, and legs. The annular body has a topside surface and an underside surface. The annular body defines an opening. The flexible tabs are coupled to the annular body and canted upwardly away from the topside surface at a first angle. The flexible tabs are configured to engage a post of the second panel. The legs extend downwardly away from the underside surface at a second angle. The legs are configured to engage the first panel to form a part-in-assembly (PIA) component when inserted through the opening.

A method for a robot to automatically find a bending position, including the following steps: step 1, establishing a gripper tool coordinate system (TX, TY, TZ); step 2, determining a user coordinate system (X.sub.A, Y.sub.A, Z.sub.A; X.sub.B, Y.sub.B, Z.sub.B) of rear blocking fingers (11, 21); step 3, a robot gripper moving horizontally, and detecting the state of sensors (12, 22); step 4, the robot gripper executing a rotational movement, detecting the state of the sensors (12, 22), and thereby obtaining a standard bending position. The robot automatically finds the bending position, the teaching difficulty is reduced, and the bending quality is increased. In the elevator industry, elevator door plate bending sizes are the same, but forming sizes are different. In the present invention, only one product process needs to be taught in order to satisfy elevator door plate processing with different specifications, thereby reducing maintenance costs and increasing production efficiency.

A manufacturing method is provided during which a plurality of first apertures are formed in a first plate to provide an apertured first plate. A plurality of second apertures are formed in a second plate to provide an apertured second plate. The apertured first plate and the apertured second plate are bonded to a base sheet to form a structure. The base sheet is bent to form a bend in the structure between the apertured first plate and the apertured second plate.

This invention provides a polymer, which is preferably a polyether polymer. The polymer may be uses in coating compositions. Containers and other articles comprising the polymer and methods of making such containers and other articles are also provided. The invention further provides compositions including the polymer (e.g., powder coatings), which have utility in a variety of coating end uses, including, for example, valve and pipe coatings.

This invention provides a polymer, which is preferably a polyether polymer. The polymer may be uses in coating compositions. Containers and other articles comprising the polymer and methods of making such containers and other articles are also provided. The invention further provides compositions including the polymer (e.g., powder coatings), which have utility in a variety of coating end uses, including, for example, valve and pipe coatings.

A system (100) for a sheet metalworking is disclosed. The system (100) comprising a punch (1) connectable to a press (P), wherein the punch (1) is configured with a first electrical terminal (2). A die (3) configured with a die surface (DS), to support sheet metal (SM). A support member (4) movably disposed in the die (1), the support member (4) is provided with a second electrical terminal (5). The support member (4) and the punch (1) contacts a working portion (B) of the sheet metal (SM) at an axis (A-A) to supply electric current to a localized region (LR) of the working portion (B) for sheet metalworking.

A method of fabricating a metal mask includes receiving a metal planar substrate and patterning the metal planar substrate. The metal planar substrate includes a first surface and a second surface opposite to the first surface. The patterning the metal planar substrate includes forming strip-shaped structures, forming through holes, and forming a blind hole in a direction from the first surface to the second surface. The through holes extend to the first surface and the second surface. The through holes and the strip-shaped structures are alternately arranged. The blind hole extends across the through holes.

A method of fabricating a metal mask includes receiving a metal planar substrate and patterning the metal planar substrate. The metal planar substrate includes a first surface and a second surface opposite to the first surface. The patterning the metal planar substrate includes forming strip-shaped structures, forming through holes, and forming a blind hole in a direction from the first surface to the second surface. The through holes extend to the first surface and the second surface. The through holes and the strip-shaped structures are alternately arranged. The blind hole extends across the through holes.

A press brake machine configured to bend a workpiece. The machine includes an upper beam configured to hold an upper tool assembly that includes an upper rotary tool configured to hold an upper punch and an upper die. The machine also includes a lower beam configured to hold a lower tool assembly that includes a lower rotary tool configured to hold lower punch and a lower die. The upper rotary tool assembly is configured to rotate the upper punch and the upper die and the lower rotary tool assembly is configured to rotate the lower punch and the lower die. The upper rotary tool assembly is configured to position to the upper punch downwards to a first upper rotary tool position when the lower rotary tool assembly positions the lower die upwards to a first lower rotary tool position such that the upper punch.