JPH0547367Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is based on CNC (Computerized Nnmerical
Control) When measuring a workpiece with a measuring device, etc.
This invention relates to a precision measuring device for facilitating workpiece positioning and measurement program selection.

(Prior Art) Generally, when measuring the dimensions and position of a workpiece using an NCN measuring device, the workpiece is placed on the measurement table of the NCN measuring device, and approximately positioned and fixed. Then, the NCN measuring device is activated to measure the reference point on the end face of the workpiece and correct the workpiece coordinates. Thereafter, the measuring device is operated according to the measurement program for the placed workpiece.

(Problem that the invention aims to solve) However, simply placing the workpiece on the measurement table as described above causes the workpiece's position relative to the measurement table to be unstable, so it is necessary to perform the positioning operation manually, and the workpiece coordinates You must check the settings each time. Additionally, since the measurement program differs depending on the workpiece placed, it is necessary to select a dedicated measurement program and operate the NCN measuring device accordingly. For this reason, it takes a lot of time and effort to make measurements, and the manual work is complicated, and if the selected selection program is inappropriate, the workpiece and the detector of the NCN measuring device may be connected during the measurement. If a collision occurs,
There is a problem that damages the NCN measuring device.

The present invention provides a precision measuring device that reduces the complexity of manual work and the time and effort due to large man-hours when measuring a workpiece.

(Means for solving the problem) In order to solve the above problem, the present invention solves the problem by
A precision measurement jig with multiple reference blocks attached to the top and side surfaces for specifying the Z coordinate system and multiple workpiece positioning pins on the top surface, and a stop block to stop the measurement jig. A measuring device provided on a measuring table, and program selection means consisting of a step or a bar code between the plurality of reference blocks and at least one other reference block are provided on the precision measurement jig, A detector for detecting a reference block and a step, and a reading means for reading barcode information of the program selection means are provided, and a subroutine operates the detector to detect the
The present invention is characterized by a computer having a function of specifying the Y and Z axes and selecting a main routine measurement program, and a function of starting the measurement program based on the information of the bar code and performing both the subroutine and the main routine. It is something to do.

(Function) Since the present invention is constructed as described above, it has the following functions. In other words, multiple reference blocks for specifying the X, Y, and Z coordinate systems are attached to the top and side surfaces of the precision measurement jig, multiple workpiece positioning pins are provided on the top surface, and the measurement table is equipped with a precision measurement jig. A block is provided to stop the jig, so by placing the precision measurement jig on the measurement table so that it is stopped by the block, it is possible to position the precision measurement jig with respect to the measurement table. Also, the X, Y, Z relative to the measurement table of the precision measurement jig placed in this way
It is possible to specify the coordinate system of this precision measurement jig using the reference block, and the
By specifying the Z coordinate system, it becomes possible to substantially specify the X, Y, and Z coordinate systems of the workpiece positioned by the plurality of workpiece positioning pins and placed on the precision measurement jig.

Then, a detector for detecting a plurality of reference blocks and steps, and a reading means for reading barcode information of the program selection means are provided, and a subroutine operates the detector to detect the X, Y, A computer is equipped with a function to specify the Z coordinate and select the main routine measurement program, and a function to start the measurement program based on the information in the bar code and perform both the subroutine and main routine. Accordingly, it becomes possible to automatically specify the coordinates of the workpiece and automatically select the measurement program.

(Example) Hereinafter, an example of the present invention will be described using FIG. 1 and FIG. 2. In the figure, 11 is a CNC measuring device, and a detector 13 with a prong 12 attached to the tip is connected to a pair of columns 1 erected on a measuring table 14.
It is attached to a support member 16 extending between 5 and 5 so as to be movable vertically and horizontally.

Further, the support column 15 or the support member 16 is attached so as to be movable in a direction perpendicular to the plane of the paper. A measuring jig 17 can be placed on the measuring table 14 with its movement regulated by restraining blocks 18 and 19. 20 is a barcode detector, which is connected to a computer system 21.

On the upper surface of the measurement jig 17, there is a thick reference block 2 on which the workpiece W is placed, as shown in FIG.
2, 23, 24 are provided on three sides, and
Main and sub-knock pins 25 and 26 for fitting and positioning the workpiece W from below are provided protrudingly at a predetermined interval. As shown in Fig. 3, the reference blocks 22, 23, and 24 have upper surfaces divided into two blocks, a measurement surface F1 and a workpiece placement surface F2, and bolt holes 36 are drilled in the flange surfaces formed on the sides. , are fixed to the upper surface of the measuring jig 17 with bolts. Further, a barcode label 27 is attached to the upper surface of the measurement jig 17 with a reading portion provided thereon.

Information necessary for determining the measurement program of the NCN measuring device 11 is written on the barcode label 27.

Recesses 28 and 29 are formed in the Y-axis direction of the coordinate system of the measurement jig 17, and recesses 30 and 31 are formed in the X-axis direction of the coordinate system.
A reference block 33 for specifying the Y-axis of the coordinate system of the measurement jig 17 is fixed to the recess 29 with a bolt, and the measurement jig 17 is fixed to the recess 30 and 31 with a bolt.
Reference blocks 34 and 35, which specify the X-axis of the coordinate system, are fixed with bolts. In addition, the recess 28
In addition to the reference blocks 33, 34, and 35 that specify the coordinate system X and Y axes of the measuring jig 17, there are also separate reference blocks 33, 33, and 35 at positions offset from the reference plane of the reference block 33 by a dimension D determined in accordance with the program. A reference block 32 is fixed with bolts.

FIG. 5 shows another embodiment, and the difference from FIG. 2 is that the embodiment shown in FIG. 2 is provided with both a reference block 32 and a barcode label 37 as program selection means. In the embodiment shown in FIG. 5, the bar code label is omitted and only the reference block is used. For other parts, please refer to the second
Since it is the same as the embodiment shown in the figures, the same parts are given the same reference numerals and the explanation thereof will be omitted. In addition,
Reference numeral 4 in the figure is a rubber pad.

FIG. 6 is a side view of FIG. 5, and shows the measurement jig 1.
An air pad 5 is provided between the measuring jig 7 and the table 8 to facilitate movement of the measuring jig 17. 6 is an air supply nozzle connected to the air pad 5 via a hose 7.

The operation of this embodiment configured as above will be explained next. First, the workpiece W is placed on the measurement jig 17.
Equipped with. At this time, the notch pin holes of the workpiece W are fitted into the notch pins (workpiece positioning pins) 25 and 26 protruding from the measurement jig 17, and the workpiece W is supported on the mounting surface F2 of the reference blocks 22, 23, and 24. The coordinate system Z of the workpiece W with respect to the measurement jig 17 is
The axis is identified.

Next, the measuring jig 17 loaded with the workpiece W is
The CNC measuring device 11 is moved in the direction of the stop blocks 18 and 19 fixed to the top surface of the measurement table 14, and the side of the measuring jig 17 and the stop blocks 18,
Press until 19 is firmly attached. By fixing the measuring jig 17 in this way, the work W
Rough positioning in the X-axis direction and Y-axis direction can be performed.

As one aspect of measurement, when the workpieces W to be measured are of similar size and the measurement jigs 17 are also of almost the same size, the work efficiency can be improved by performing the following procedure.

The measurement program of the CNC measuring device 11 is prepared with a subroutine for measuring the measurement jig 17 and a main routine for measuring the necessary parts of each workpiece W, and the subroutine moves the detector 13 to measure each reference block. , reference block 3
From the measurement results of 4 and 35, the coordinates of the measurement jig 17 in the X-axis direction with respect to the measurement table 14 can be determined, and from the measurement results of the reference block 33 at those coordinates, the coordinates of the measurement jig 17 in the Y-axis direction can be determined. can.
Also, the measurement surface F1 of the reference blocks 22, 23, 24
From the measurement results, the coordinates of the measurement jig 17 in the Z-axis direction with respect to the measurement table 14 can be determined. From the above information, the coordinates of the measuring jig 17 in the X, Y, and Z directions with respect to the measuring table 14 are determined, and the position of the workpiece W with respect to the measuring jig 17 is determined by the two dowel pins 25 and 26. , the position of the workpiece W with respect to the measurement table 14 is also inevitably determined.

Next, the reference block 33 and the reference block 32 at a different position are measured to determine the dimensional difference D in the X-axis direction. If settings are made so that various measurement programs for the main routine can be selected in accordance with this dimensional difference D, each workpiece W can be automatically measured using the corresponding measurement program.

Further, as another measurement mode, when the workpieces W to be measured have different dimensions and the sizes of the measurement jigs are also different, the following measurement may be performed.

Information corresponding to the measurement program for each workpiece W is set on the barcode label 27 attached to the top surface of the measurement jig 17, and the information is read by the barcode detector 20 to run the measurement program. to start. This measurement program includes procedures for performing both a subroutine and a main routine. When the measurement of the subroutine is completed, the position of the workpiece W with respect to the measurement table 14 is determined, and the measurement program of the main routine is also determined. In addition, the reference block 32 and the reference block 33
The dimensional difference D in the X-axis direction with barcode label 27
This information can be used to enrich checks by verifying whether the information that determines the measurement program set is correct.

(Effect of the invention) Since the invention is constructed as described above, the workpiece is fixed to the measurement table by the measurement jig, and the workpiece is fixed to the measurement table by the reference block provided on the measurement jig. Since the X, Y, and Z axes of the machine are automatically determined, it is only necessary to place the workpiece in accordance with the procedure, and the measurement time and man-hours can be reduced.

In addition, since information indicating the measurement program is provided on the measurement jig, the measurement program can be automatically selected and instructed, thereby avoiding damage to the workpiece and CNC measuring device due to collision between the workpiece and CNC measuring device due to human error. can do.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the precision measuring device of the present invention, Figure 2
3 and 4 are perspective views of the reference block, FIG. 5 is a plan view of another embodiment, and FIG. 6 is a side view of FIG. 5. 11...Measuring instrument, 14...Measurement table, 17
...Measurement jig, 18...Stopping block, 19...
...Block block, 20...Barcode detector, 2
1... Computer, 22, 23, 24... (Top surface) reference block, 25, 26... Work positioning pin, 27... Bar code, 32, 33, 34,
35...(Side) Reference block.

Claims (1)

[Scope of utility model registration request] A precision measurement jig with multiple reference blocks attached to the top and side surfaces for specifying the X, Y, Z coordinate system and multiple workpiece positioning pins on the top surface, and a precision measurement jig for stopping the measurement jig. a measuring device with a stop block provided on a measuring table, and a program selection means consisting of a bar code or a step between the plurality of reference blocks and at least one other reference block is provided in the precision measuring jig. , a detector for detecting the plurality of reference blocks and steps, and a reading means for reading barcode information of the program selection means, and a subroutine operates the detector to detect the X, Y, The precision machine is characterized by being provided with a computer having a function of specifying the Z-axis and selecting a main routine measurement program, and a function of starting the measurement program based on the information of the bar code and performing both the subroutine and the main routine. measuring device.