Arrangement for mechanically and accurately processing a workpiece with a position detecting pattern or patterns

An apparatus for severing a workpiece having at least one optically sensible position detecting pattern formed thereon against which a desired severed position of the workpiece is established, comprising:

• a fixed machine bed;
• a worktable for mounting a workpiece thereon, arranged on the fixed machine bed so as to be linearly movable in at least one axial direction of the X- and Y-perpendicular coordinate axes extending in a horizontal plane;
• table drive means for linearly moving said worktable in accordance with drive control information, said table drive means including at least a drive motor for drive linear movement of said worktable via a feed mechanism, and a drive circuit connected to said drive motor;
• a rotatable abrasive wheel for severing at the desired severing position of said workpiece mounted on said worktable when said desired position of said workpiece is moved to and positioned at a predetermined position suitable for engagement with a severing edge of said abrasive wheel;
• a tool carrier arranged on said fixed machine bed at a position spaced from said worktable and carrying said abrasive wheel, said tool carrier being provided with a tool feed means for engaging said abrasive wheel with said workpiece when severing said workpiece;
• a position aligning system responsive to at least one position detecting pattern having a latent reference line and at least one side line inclined relative to one of the X and Y coordinate axes at a predetermined angle for carrying out a position alignment of said desired severing position of said workpiece with said predetermined position suitable for engagement with said abrasive wheel, said position aligning system including:
• a position detector arranged above said worktable while maintaining a fixed positional relationship with respect to said abrasive wheel, said position detector having a CCD type line sensor having means for issuing an electrical signal indicating a linear amount of displacement of said position detecting pattern of said workpiece in at least one axial direction of said X- and Y-coordinate axes by scanning said position detecting pattern in a predetermined single axial direction of said X- and Y-coordinate axes when said workpiece mounted on said worktable is positioned directly beneath said position detector, and;
• operation and control means electrically connected to said position detector for carrying out a mathematical operation to detect the latent reference line of said position detecting pattern and said desired severing position of said workpiece in accordance with said electrical signal from said position detector, said operation and control means being further electrically connected to said drive circuit for providing said table drive motor with said drive control information for moving said worktable until said desired severing position of said workpiece is aligned with said predetermined position suitable for engagement with said abrasive wheel.

An arrangement for mechanically processing a workpiece having at least one optically sensible position detection pattern formed thereon against which a desired position of the workpiece to be mechanically processed is established, comprising:

• a worktable for mounting a workpiece thereon, arranged to be linearly movable in at least one axial direction of X- and Y-perpendicular coordinate axes extending in a plane;
• drive means including a table drive means for linearly moving said worktable in accordance with drive control information;
• a machining tool for effecting a mechanical processing of the workpiece mounted on said worktable when the desired position of the workpiece is moved to and positioned at a predetermined position suitable for engagement with said machining tool;
• a tool carrier carrying said machining tool and provided with a tool feed means for engaging said machine tool with said workpiece when carrying out the mechanical processing of said workpiece;
• a position aligning system responsive to a position detecting pattern having a first rectangle, a second rectangle parallel to and spaced a predetermined to distance from one side of the first rectangle, and a third rectangle parallel to and spaced a predetermined distance from the opposite side of the first rectangle, said pattern having a latent reference line parallel to said first, second and third spaced rectangles, for carrying out a position alignment of said desired position of said workpiece with said predetermined position suitable for engagement with said machine tool, said position aligning system including:
• a position detector arranged at a fixed position with respect to said machining tool, and having an opto-electric line sensor including means for issuing an electrical signal indicating a linear amount of displacement of said position detecting pattern of said workpiece in at least one axial direction of said X- and Y-coordinate axes by scanning said position detecting pattern in a predetermined single axial direction of said X- and Y-coordinate axes when said workpiece mounted on said worktable is positioned beneath said position detector, and;
• operation and control means connected to said position detector for carrying out a mathematical operation to detect the latent reference line of said position detecting pattern and said desired position of said workpiece to be mechanically processed in accordance with said electrical signal from said position detector, said operation and control means being further connected to said table drive means for providing said table drive means with said drive control information for moving said worktable until said desired position of said workpiece to be mechanically processed is aligned with said predetermined position suitable for engagement with said machine tool.

An apparatus for severing a workpiece having at least one optically sensible position detecting pattern formed thereon against which a desired severed position of the workpiece is established, comprising:

• a fixed machine bed;
• a worktable for mounting a workpiece therein, arranged on the fixed machine bed so as to be linearly movable in at least one axial direction of the X- and Y-perpendicular coordinate axes extending in a horizontal plane;
• table drive means for linearly moving said worktable in accordance with drive control information, said table drive means including at least a drive motor for drive linear movement of said worktable via a feed mechanism, and a drive circuit connected to said drive motor;
• a rotatable abrasive wheel for severing at the desired severing position of said workpiece mounted on said worktable when said desired position of said workpiece is moved to and positioned at a predetermined position suitable for engagement with a severing edge of said abrasive wheel;
• a tool carrier arranged on said fixed machine bed at a position spaced from said worktable and carrying said abrasive wheel, said tool carrier being provided with a tool feed means for engaging said abrasive wheel with said workpiece when severing said workpiece;
• a position aligning system responsive to a position detecting pattern having a first rectangle, a second rectangle parallel to and spaced a predetermined to distance from one side of the first rectangle, and a third rectangle parallel to and spaced a predetermined distance from the opposite side of the first rectangle, said pattern having a latent reference line parallel to said first, second and third spaced rectangles, for carrying out a position alignment of said desired severing position of said workpiece with said predetermined position suitable for engagement with said abrasive wheel, said position aligning system including:
• a position detector arranged above said worktable while maintaining a fixed positional relationship with respect to said abrasive wheel, said position detector having a CCD type line sensor having means for issuing an electrical signal indicating a linear amount of displacement of said position detecting pattern of said workpiece in at least one axial direction of said X- and Y-coordinate axes by scanning said position detecting pattern in a predetermined single axial direction of said X- and Ycoordinate axes when said workpiece mounted on said worktable is positioned directly beneath said position detector, and;
• operation and control means electrically connected to said position detector for carrying out a mathematical operation to detect the latent reference line of said position detecting pattern and said desired severing position of said workpiece in accordance with said electrical signal from said position detector, said operation and control means being further electrically connected to said drive circuit for providing said table drive motor with said drive control information for moving said worktable until said desired severing position of said workpiece is aligned with said predetermined position suitable for engagement with said abrasive wheel.