JPH02306106A - Calculating apparatus of surface dimension - Google Patents

Abstract

PURPOSE:To save labor in a checking process by detecting the surface dimensions of a work on the basis of the changing direction and changing amount to the initially-set coordinates. CONSTITUTION:After various data stored in a RAM 3 for initialization are completely erased, positional coordinates for initial setting are input. Thereafter, a spherical stylus H is agreed with the positional coordinates the center of which is initially set by a control part 7. As the stylus H is moved from this state, the presence or absence of the change in the positional coordinates is detected. If the change is present, the actual surface dimensions of the work W are detected based on the changing direction and changing amount from the initially-set coordinates, and recorded and displayed at 8. Thus, the checking process produces less errors, with saving labor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a surface dimension determining device, and more particularly to the structure of a device for determining the surface dimension of a mold used in press molding.

(Prior Art) As is well known, for example, a mold A used for press working is made by combining an upper mold A1 and a lower mold A2, as shown in FIG. The sheet metal located in the gap indicated by the symbol t) is formed.

By the way, the surface dimensions of the molds used for the above-mentioned press forming are set taking into consideration the thickness of the sheet metal located between the molds, and the surface dimensions of these molds are determined by the time when the grinding process, etc. After that, it will be inspected.

FIG. 7 shows an example of an inspection jig used for inspecting the above-mentioned surface dimensions. This inspection jig B is placed on a substrate (not shown), for example, to form a mold, and in FIG. 7, a lower mold. It is an elliptical frame body in which inspection plates B1, each having a shape that creates a gap between them and the surface of A2, are provided at a plurality of locations along the surface of the mold.

When inspecting the surface dimensions of the mold mentioned above, the jig B is placed on a surface plate that has a reference position on the dimensions common to the mold.
is placed on the jig B, and the gap between the inspection plate B1 on the jig B and the surface of the mold is calculated by 1 (10), so that the surface dimension of this mold can be determined and compared with the design dimension. There is.

(Problem to be Solved by the Invention) However, in the surface dimension determination work described above, the surface dimension determination accuracy often depends on the processing accuracy of the inspection jig, and as a result, there are many variations in error. There is a risk of an inspection.

In addition, measuring the gap between the inspection plate provided on the inspection jig and the surface of the mold requires manpower, and there is also the problem that labor saving in inspection work cannot be achieved.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the surface dimension determining operation, an object of the present invention is to provide a surface dimension determining apparatus that can save labor in the inspection process.

(Means for Solving the Problems) In order to achieve this object, the present invention provides a surface size dividing device equipped with a spherical stylus that slides on the surface of a workpiece, which a setting unit that sets the center position coordinates of the spherical stylus as an initial setting position; and a setting unit that moves the spherical stylus so that the center of the spherical stylus is aligned with the coordinate position according to the center position coordinates set by the setting unit. for, and
a movement section for moving the spherical stylus in a predetermined direction with respect to the workpiece from the coordinate position; a reading section for reading the amount of movement of the spherical stylus from the center position coordinates as a change in the coordinate position; and a setting section. and a control unit, the reading unit being connected to the input side, and the driving unit and the display unit being connected to the output side, the control unit being located at the coordinate positioning device set by the setting unit. When a change occurs in the coordinate position when the spherical stylus is moved, it is proposed to calculate the actual surface dimensions of the workpiece based on the direction and amount of change with respect to the initially set coordinate position. It is something to do.

(Function) According to the present invention, when the spherical stylus is moved from the initially set center position, it is initially set that the surface dimensions of the actual workpiece are the same as the designed surface dimensions. If there is no change in the center position of the spherical stylus, or conversely, if the actual surface dimensions of the workpiece are different from the designed surface dimensions, then the initially set center of the spherical stylus By changing the position, the actual surface dimensions can be determined.

(Embodiment) Hereinafter, details of an embodiment of the present invention will be explained with reference to FIGS. 1 to 5.

FIG. 1 is a block diagram showing the main parts of a surface dimension determining device according to an embodiment of the present invention.

That is, the surface dimension indexing device according to the embodiment of the present invention is equipped with a spherical stylus H that comes into sliding contact with the surface of the workpiece W, as shown in the second diagram, and a control section for performing indexing using the spherical stylus H. 1 is the main part.

As shown in FIG. 1, this control section 1 is constituted by a microcomputer (hereinafter referred to as CPU) LA that can perform arithmetic control processing.

The above-mentioned CPUIA includes a ROM 2 that stores basic programs and basic data for arithmetic and control processing, and a ROM 2 that stores the movement amount of the spherical stylus H. A
N 3 are connected to each other, and external equipment is connected via the engineering/○ interface 4.

On the input side of the I10 interface 4 described above, there is a setting section 5 for setting the center position coordinates of the spherical stylus obtained by adding the radius of the spherical stylus to the designed surface dimension, and a setting section 5 for setting the center position coordinates of the spherical stylus obtained by adding the radius of the spherical stylus to the designed surface dimension. A reading section 6 for reading the amount of movement of the spherical stylus is connected thereto, and a driving section 7 and a display section 8 for moving the spherical stylus are connected to the output side, respectively.

As shown in FIG. 2, the Shobara setting of the center position in the setting unit 5 described above is based on the radius (Ra) that is the ideal surface dimension of the workpiece W in the design that allows for no machining errors. On the other hand, by adding the radius (ra) of the spherical stylus H, the center position of the spherical stylus H when the spherical stylus H is in contact with the workpiece surface is set as the coordinates.
This coordinate position (Xo, Zo) becomes the initial setting value. Note that when setting the coordinates of the center position of the spherical stylus H, the coordinates of the position of contact (in FIG. 2, reference numerals,
Xa, Za) and the surface normal vector at this coordinate position are also input and set at the same time, and from these data, it is easy to find the coordinate change when the spherical stylus I-I moves, which will be described later. I'll keep it.

On the other hand, the above-mentioned driving unit 6 is used for arranging the spherical stylus H at the initially set coordinate position, and for example, as shown in the third figure, from the initially set coordinate position to the direction in which it comes into contact with the workpiece surface. It has the function of moving the spherical stylus H, and the direction of movement is fixed on two of the X, Y, and Z axes that form the three-dimensional space, for example, as shown in Figure 3 (A). , the Z-axis direction or the third
As shown in Figure (B), the direction is in the X-axis direction.

Therefore, when the spherical stylus H is placed at the initially set coordinate position, by detecting the change in the coordinates of the center position of the spherical stylus H at that position, for example, as shown in FIG. Workpiece W whose surface dimensions can be obtained at
The radius (Rb) of the actual workpiece is greater than the radius (Ra) of
) is smaller, the coordinate change of the center position of the spherical stylus H is smaller than the coordinate change at the contact position of the workpiece W and the spherical stylus H (from symbol Za to symbol zb in Fig. 4). or a change from sign Xa to sign The contact position, in other words, the radius corresponding to the surface dimension of the workpiece can be determined.

In addition, in the case of FIG. 4 mentioned above, a case was explained in which the actual surface dimension of the workpiece W is smaller than the designed surface dimension. If the dimensions are larger than the designed surface dimensions, the procedure described above will be reversed. In addition, when carrying out such a procedure, the initial coordinate position is set by adding a certain amount of margin to the designed surface dimensions of the workpiece and the radius of the spherical stylus. It is also possible to do so.

This is advantageous in determining cases where the actual surface dimensions of the workpiece are larger than the designed surface dimensions.

Since this embodiment has the above-described configuration, operations are performed based on the flowchart shown in FIG.

That is, after completing the erasure of various data stored in the RAM 3 through initialization, input the position coordinates for the initial setting shown in FIG. Its center position is aligned with the initial position coordinates.

Then, the spherical stylus H is moved from this state to determine whether or not there is a change in coordinates. If there is a change, as explained in FIG. 4, the direction and amount of change from the initially set coordinates are , the surface dimensions of the actual workpiece W are determined and recorded and displayed.

(Effects of the Invention) As described above, according to the present invention, changes with respect to the initially set coordinates are detected by sliding contact with the surface of the workpiece.
An inspection process with few errors can be obtained without depending on the processing accuracy of the equipment used for inspection, and moreover, it becomes possible to save labor in the inspection process, in other words, to automate it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the main parts of the surface dimension indexing device according to the embodiment of the present invention, and FIGS. 2 to 4 are for explaining the processing contents of the main parts shown in FIG. 1. FIG. 5 is a flowchart for explaining the operation of the main parts shown in FIG. 1. FIG. FIG. 7 is a model diagram showing a conventional example of a method for determining surface dimensions.

Claims (1)

[Scope of Claims] A surface dimension determining device equipped with a spherical stylus that slides on the surface of a workpiece, the center position coordinates of the spherical stylus obtained from the designed surface dimension being set as an initial setting position. and according to the center position coordinates set by the setting section above,
a drive unit for moving the spherical stylus so that the center of the spherical stylus is aligned with the coordinate position, and for moving the spherical stylus in a predetermined direction with respect to the workpiece from the coordinate position; a reading unit that reads the amount of movement of the spherical stylus from the spherical stylus as a change in coordinate position; a control unit that has the setting unit and reading unit connected to the input side, and the driving unit and the display unit connected to the output side; and a controller, when a change occurs in the coordinate position when the spherical stylus placed at the coordinate position set by the setting unit moves, the control unit controls the change in the initially set coordinate position. A surface dimension determining device that determines the actual surface dimension of a workpiece based on the direction and amount of change.