JPH018962Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for fully automatically mastering a plurality of reference master pieces in an automatic measuring machine that successively compares and measures minute dimensions of objects to be measured. Traditionally, master pieces of large and small ranges have been used for master alignment of automatic measuring machines, but the applicant of the present invention has previously developed a method for master alignment using reference workpieces of multiple large and small range groups. He invented a method and device for this and filed an application for the same (Japanese Patent Application No. 114943/1983).

The master matching method shown therein measures the dimensions of the reference workpieces of multiple large-range groups and multiple small-range groups in advance using a high-precision measuring machine that serves as a reference, and then calculates the average value of each. Then, the standard workpieces of the large and small groups are measured using the measuring machine for measuring the object to be measured, the average value of each is determined, and these average values are calculated and stored first. The zero point and magnification are corrected with high precision based on the difference between the average values and the respective average values. As a device to specifically carry out this process, a means for storing multiple large and small standard workpieces is provided within the continuous measuring device or in addition thereto, and the standard workpieces are fed into the measuring device during master alignment. After the measurement, the standard workpiece was stored in another storage means, and after the master alignment was completed, the stored reference workpiece was manually returned to the supply section. The present invention completely automates the operation of manually returning the reference workpiece using a simple mechanism, and also improves versatility.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, a rotary disk 2 transports a workpiece 1 from a supply section 3 of suitable construction.
They are received one by one and stored in a plurality of accommodation holes 4 provided on the concentric circumference of the rotary disk 2 at equal angular (α°) intervals. The rotating disk 2 is fixed to a shaft 6 of a stepping motor 5, and can be rotated intermittently at a fixed angle (counterclockwise rotation in the figure) in response to a command. Of the plurality of accommodation holes 4, accommodation holes a and c located at diametrical positions with respect to each other and accommodation holes b and d (shown with diagonal lines in the figure) located at right angles thereto accommodate workpieces to be measured. A plurality of accommodation holes e and f arranged between the accommodation holes a, b, c, and d are accommodation holes for accommodating the reference master piece. If we divide the entire circumference of the rotary disk 2 into 20 equal parts, then out of the 16 accommodation holes excluding accommodation holes a, b, c, and d, 8 accommodation holes denoted by e have, for example, the standard of the small group. The master piece and the standard master piece of the general group are accommodated in the eight accommodation holes indicated by f. A measuring device 7 is provided at a diameter position C with respect to the workpiece supply position A to measure the dimensions of the workpiece conveyed by the rotary disk 2. A carry-out section 8 is provided at a position D, which is further rotated 90 degrees counterclockwise from the measurement position C.

In the above configuration, during measurement, the workpieces 1 are sent one by one from the supply section 3 and accommodated in the receiving hole a, and then the rotating disk 2 is rotated intermittently through 90 degrees by the stepping motor 5. The workpiece 1 accommodated in the accommodation hole a is conveyed to the measurement position C. The workpiece 1 whose dimensions have been measured by the measuring device 7 at the measurement position C is conveyed to the D position by rotation of the rotary disk 2 through 90 degrees, and sent out from the unloading section 8, where it is subjected to appropriate treatment such as sorting. Note that during the rotation of the rotary disk 2, the workpieces placed in the receiving holes a, b, c, and d are repeatedly supplied, measured, and carried out, respectively, and continuous measurements are performed.

Next, when it becomes necessary to perform master alignment, the operation of supply section A and unloading section D is stopped, and other accommodation holes e and f except accommodation holes a, b, c, and d are moved by stepping motor 5. is sequentially rotated by α degrees to measurement position c, and the reference master pieces of the small group and large group accommodated there are measured. If the large
If a total of 16 small standard master pieces are inserted, the rotation of the stepping motor 5 will be 18 degrees,
Set so that only accommodation holes a, b, c, and d can be rotated by 36 degrees.

In this way, the rotary disk 2 is rotated once and the dimensions of the reference master piece of the small group and the large group are measured at the measurement position C, and the average value of each group is determined. The zero point and magnification are corrected based on the difference between the average value of each group, which is calculated and stored using a high-precision measuring machine. It can be performed with high precision.

In the above embodiment, an example was explained in which two groups, a small range group and a large range group, were accommodated as reference master pieces, but when performing only zero point correction, it is sufficient to accommodate one group of reference master pieces. can reach that goal. Further, the number of accommodation holes can be increased or decreased as appropriate, and furthermore, the number of accommodation holes that accommodate workpieces among the accommodation holes can also be set as appropriate. For example, if two diametrically opposed accommodation holes are used as accommodation holes for workpiece storage, the supply section and the unloading section are provided at the same position, and the rotation angle of the rotary disk during measurement is set to 180 degrees. Easy to implement. Similarly, there may be three accommodation holes for accommodating workpieces spaced at 120° intervals, and the supply section, measurement section, and delivery section may be provided at 120° positions. Furthermore, in the embodiments shown in FIGS. 1 and 2 above, it is of course possible to use position B as the measuring section after the supply section at position A, position C as the defective product discharge section, and position D as the good product unloading section. be.

In any of the above embodiments, a plurality of workpieces belonging to the small group and a plurality of workpieces belonging to the large group are extracted as appropriate from among the workpieces to be measured. It can be used as a reference master piece, or it is also possible to use a plurality of small and large master pieces manufactured separately from the workpiece as a reference master piece.

As described above, according to the present invention, master matching using a plurality of reference master pieces can be performed with a simple mechanism and fully automatically, which is of great industrial benefit.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 1: Workpiece, 2: Rotating disk, 3: Supply section, 4: Accommodation hole, 5: Stepping motor,
7: Measuring section, 8: Carrying out section.

Claims (1)

[Scope of utility model registration request] A rotary disk having a plurality of workpiece accommodation holes arranged at equal intervals on a concentric circumference, a supply section A for supplying the workpieces to the accommodation holes, a workpiece measurement section C, and a discharge section D arranged around the rotating disk, and the disk. Rotating drive unit, disk rotation, workpiece supply, measurement,
It is composed of a calculation storage unit that controls discharge and determines whether the measurement result of the workpiece is acceptable based on the measured value of the master workpiece. The master workpieces are arranged at positions e and f, and the drive unit sets the workpiece positions a, b, c, d to A, B,
A fully automatic master alignment device that performs intermittent rotation to sequentially align C and D positions, and sequentially align e and f positions to measurement portion C during master alignment.