JPH045510A - Measuring machine - Google Patents

Abstract

PURPOSE:To reduce the size and weight of a three-dimensional moving mechanism by constituting a detector provided to a detector mounting part replaceable. CONSTITUTION:When it is confirmed that a work 38 is carried in, the three- dimensional moving mechanism 14 is driven and a selected detector 16A in a detector changer 16 is arranged at a replacement position 30A. At the same time, a rotary table 18 rotates to hold the work 38 at a specific measurement position. Then a change arm 32A rotates and a detector 14A at the detector mount part 14 is replaced with the detector 16A in the detector changer 16 to mount the detector 16A on the detector mount part 14 newly. After the mounting operation is completed, the three-dimensional moving mechanism 12 is driven to arrange the detector 16A at the measurement position and the shape of the object part of the work 38 is measured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a measuring instrument, and particularly to a measuring device in which a detector is moved in three-dimensional directions in a production line to measure the shape, etc. of an object to be measured. Regarding machines.

[Conventional technology]

In-line measuring equipment, which is generally used on production lines, attaches all the various types of detectors necessary for measurement to a moving part, specifies the one required for measurement from among these detectors, and then moves the moving part to , the shape of the workpiece, etc. was measured using a designated detector by moving in the three-dimensional direction of the ySz axis.

[Problem to be solved by the invention]

However, since all the detectors necessary for measurement are attached to the moving part, floating and lily pink units are required for all the detectors, which increases the size of the moving part and slows down the movement speed. There is a problem that it cannot be done quickly, and there is also a problem that it is expensive.

In addition, since all the detectors are installed in moving parts, it is difficult to add or change detectors, making it difficult to respond to changes in the type of workpiece or measurement items. Since all the necessary detectors are provided according to the work to be inspected on each line, the machine is dedicated to that work, resulting in a high price.

The present invention has been made in view of these circumstances, and aims to reduce the cost of the measuring device and shorten the measuring time by downsizing the moving part, and provides an in-line measuring device with greater versatility. The purpose is to

[Means to solve problems]

In order to achieve the above object, the present invention is provided with a measuring instrument main body, a rotary table for holding a transported workpiece and fixing the workpiece in an arbitrary direction, and a three-dimensional movement mechanism, which is provided on the rotary table. A detector mounting part that supports a detector that measures a workpiece in a floating manner and can be electrically connected to the detector, and a changer drive mechanism that stores a plurality of detectors and connects a desired detector
A detector changer that is placed in the replacement position and replaced with the detector in the detector mounting section, a rotary table mechanism that holds the transported workpiece and fixed it in any direction, and a rotary table mechanism that holds the transported workpiece and fixes it in any direction a control unit that controls a three-dimensional movement mechanism and a changer drive mechanism to remove the detector from the mounting part and return it to the detector changer, take out a new detector from the detector changer and mount it in the detector mounting part; and a measurement data processing part. It is characterized by consisting of.

[Effect]

According to the present invention, a detector supported in a floating and IJ removable manner by a detector mounting portion provided in a three-dimensional movement mechanism is removed and replaced with a new detector stored in a detector changer. It's coming. Therefore, there is no need to provide all the detectors in the detector mounting section, and furthermore, there is no need to provide floating devices or reaving mechanisms for all the detectors.

[Example = 1] A measuring device according to the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 3, the inline measuring device 10 is
It is composed of a three-dimensional drive mechanism 12, a detector mounting section 14, a detector changer 16, a rotary table 18, a control section 20, a measurement data processing section 52, and the like.

The moving post 21 of the three-dimensional drive mechanism 12 is provided on a pedestal 24 via a bearing guide 22 so as to be slidable in the X-axis direction in FIG. This moving post 21 has a frame 26
is provided so as to be slidable in two axial directions (the axial direction of the moving post 21 in FIG. 1), and a moving shaft 28 is provided on the frame 26 so as to be slidable in the Y-axis direction.

Therefore, as shown in FIG. 2, the three-dimensional drive mechanism 12 is made into a unit, and the unitized one is attached to the side surface of a pedestal 24 that supports the rotary table 18 and the like. Further, the moving shaft 28 can be moved in three-dimensional directions of the xlY and z axes in FIG. 1 by driving a servo motor (not shown). Furthermore, since the moving post 21 is equipped with an air balance mechanism, the frame body 26 can be stopped at a predetermined position.

Note that linear scales can be attached to the x, y, and z axes of the three-dimensional drive mechanism 12, so it is also possible to add linear scales to measure the position of the workpiece when necessary.

Further, the detector mounting part 14 provided at the right end of the moving shaft 28 in FIG. It is equipped with a mechanism to transmit electronic signals wirelessly.

The floating mechanism can then release the detector 14A in a direction perpendicular to the axial direction. Further, the floating mechanism is provided with a position detection sensor, and when the detector is placed at a reference position, a servo motor (see figure) moves the detector mounting part 14 in three-dimensional directions based on a signal from the position detection sensor (not shown). (not shown) is driven. Further, the floating mechanism includes a mechanism for correcting center deviation due to difference in detector weight.

Furthermore, since the detector mounting portion 14 is provided with a relieving mechanism that allows the detector 14A to escape in the axial direction, the detector 14A can be inserted into a portion to be measured such as a hole formed in the workpiece 38. Even if this is not possible, the detector etc. can be protected.

Furthermore, the wireless transmission mechanism is equipped with a rotary transformer for electromagnetic induction, and the weak signal when using an electric micrometer such as an inner diameter measurement gauge (bore gauge) is transferred to V-F (
(voltage-frequency) conversion and wireless transmission. Note that if the signal is large, it can also be transmitted using a contact type connector.

Further, the detector changer 16 is provided on a pedestal 24 via a pedestal 25, as shown in FIG.

The pedestal 25 can be changed to a separate unit depending on the application, and the pedestal 25
4 can be installed. A storage i3 that movably stores various detectors 16A, 16B, 16C, etc. according to measurement items, selects the necessary detector, and places it in the replacement position 30A.
0, the detector 14A of the detector mounting part 14 and the replacement position 30
It consists of a change arm unit 32 for replacing the detector A. The change arm 32A of the change arm unit 32 rotates clockwise in FIG. 1 to replace the detector at the recesses at both ends. In addition, the detector 16A
, 16B, 16C, . . . are provided depending on the content of measurement of the workpiece 38, such as inner diameter measurement, outer diameter measurement, hole depth measurement, thread depth measurement, etc.

Furthermore, the rotary table 18 is composed of a clamp mechanism that positions the workpiece and a rotary mechanism that rotates the workpiece 38 at an arbitrary angle and holds a part to be measured such as a hole formed in the workpiece 38 at a measurable position. has been done. A direct drive motor (not shown) is adopted for this low-closing mechanism, and it is possible to set an arbitrary angle (within 360") with respect to the surface of the table head 18A in water, diagonally to the Y-axis direction in Figure 1. The hole can also be measured while being held parallel to the Y-axis direction by rotating the rotary table 18.

The control unit 20 is arranged in parallel with the pedestal 24 in FIG.
and movement data of the rotary table 18 are input based on the shape of the workpiece 38.

In addition, in Fig. 1, 48 is the operation panel, 50 is the mask storage section, and 5
2 is a measurement data processing section, 54 is a carry-in line for the work 38, and 56 is a carry-out line for the work 38.

The operation of the measuring device according to the present invention configured as described above will be explained.

First, the operation when performing mastering with the in-line measuring device 10 will be explained based on FIG. 4. Press the start button on the operation panel 48 (step 70), drive the three-dimensional movement mechanism 12 to place the detector mounting 1i11 (14 detectors 14A at the detector replacement position (step 72)), and at the same time, the detector changer 16 Detectors 16A, 16 provided in
A desired detector 16A is selected from B, 16C, etc. and placed at the replacement position 30A (clamp 74). Next, the change arm 32A is operated to exchange the selected detector 16A with the detector 14A provided in the detector mounting portion 14 (clamp 76). As a result, the detector mounting part 1
4 is equipped with a new detector 16A (Step 7
6).

Next, the three-dimensional movement mechanism 12 is driven, and the mask portion 5
A desired mask is selected from among all the masks provided at 0 (step 78, 80), and the mask is attached to the detector (step 82). Mask ringing is then performed (step 82.84). All mask rings are completed using the procedure described above (step 86).

Note that the magnification (sensitivity) associated with detector replacement is adjusted in advance for each detector, and the mask ring is used only for the zero range to shorten the measurement time.

Next, the operation when measuring the workpiece 38 using the in-line measurement 8!10 will be explained with reference to FIG. 5j. First, work 3
8 has been brought in (step 90.
92), as in mastering, the three-dimensional movement mechanism 14 is driven and the selected detector 16A in the detector changer 16 is placed at the exchange position 30A (step 9
4.96).

At the same time, the rotary table 18 rotates to hold the workpiece 38 at a predetermined measurement position (step 98).

Next, the change arm 32A is rotated to change the detector 16A of the detector changer 16 and the detector 14 of the detector mounting part 14.
A, and install a new detector 16A in the detector mounting part 14.
(step 100).

After installation is completed, drive the three-dimensional movement mechanism 14 to move the detector 16
A is placed at the measurement position and the shape of the part to be measured of the workpiece 38 is measured (steps 102 and 104). The measurement results are displayed on the measurement data processing section 52 (step 104.10).
6.108). If the measurement result is not within the tolerance, re-measurement is possible. The other parts of the workpiece 38 to be measured are sequentially measured using the above-mentioned procedure to complete the measurement (
Step 110). After the measurement is completed, the workpiece 38 is carried out (step 112). Thereafter, measurements of new workpieces 38 are sequentially performed in accordance with the procedure described above.

At the time of measurement, the thread depth (the length of the threaded part) is determined by detecting the thread ridges and valleys using an optical fiber photoelectric switch, detecting the number of level changes at the time of detection, and calculating the thread pitch.

On the other hand, if there are few measurement items, the detector mounting section 14 may be a turret type equipped with a direct drive motor, and the detector changer 16 may be omitted.

In addition, the units 12, 16, and 24 can be combined as appropriate as a unit, and can be combined with existing units depending on the type of workpiece and item to be measured. Therefore, it is possible to provide versatility by replacing only the necessary parts of the unit without changing the entire device.

〔Effect of the invention〕

As explained above, according to the measuring instrument according to the present invention, the detector provided in the detector mounting part can be replaced, so the three-dimensional movement mechanism can be made into a compact U unit, and the three-dimensional movement mechanism can be It is possible to speed up movement.

Moreover, since various types of detectors can be attached by unifying the shape of the part to which the detector is attached, it is possible to easily respond to changes in the measurement items of the workpiece due to model changes of the product, etc. Furthermore, since the detector mounting portion is equipped with a floating and reliving mechanism, each detector does not require these mechanisms, and the apparatus can be made more compact.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a measuring device according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a block diagram thereof, FIG. 4 is a flowchart during mask ringing of the measuring device according to the present invention, and FIG. The figure is a flowchart at the time of the measurement. DESCRIPTION OF SYMBOLS 10... Measuring device, 12... Three-dimensional movement mechanism, 14... Detector mounting part, 16... Detector changer, 8... Rotary table, 2 1... Moving post, 2 4 ... Frame, 2 8... Movement axis, 3 2... Change arm unit

Claims (1)

[Claims] A measuring instrument main body, a rotary table that holds a transported workpiece and fixes the workpiece in an arbitrary direction, and a detector that is installed in the three-dimensional movement mechanism and measures the workpiece on the rotary table. A detector mounting part that supports the detector in a floating and releasable manner and can be electrically connected to the detector, and a detector mounting part that stores a plurality of detectors and positions the desired detector at a replacement position by a changer drive mechanism. A detector changer that replaces the detector in the detector mounting section, a rotary table mechanism that holds the transported workpiece and fixes it in any direction, and a detector changer that removes the used detector from the detector mounting section. a control unit that controls the three-dimensional movement mechanism and changer drive mechanism so as to return the sensor to the detector changer and take out a new detector from the detector changer and attach it to the detector mounting part; and a measurement data processing unit that processes data from the detector. A measuring device characterized by consisting of and.