JPH048456A - Setting device for detector - Google Patents

Abstract

PURPOSE:To position a detector to a measured work accurately by supporting a radial socket, while installing a guide device in space between a setting device body and the socket. CONSTITUTION:Each compression spring 38 is installed in the left end of a cylinder 31 of a detector setting part 14 and a recess 36 of the right end 28A of a mobile shaft 28, attaching a flange 39 tight to an inner part of the cylinder 31, and flanges 42, 46 are installed at both the ends via a bearing 40. Since these flanges 42, 46 are of constituent members for a socket 33, this socket 33 is slidable in a direction orthogonal with the axial direction of the cylinder 31. As a detector 32 is able to do its parallel movement (floating) in a direction orthogonal with the axial direction, the detector 32 can be moved parallel with a measured part such as a work hole or the like, so that the detector can be accurately positioned with the measured part.

Description

[Detailed Description of the Invention] [9 Industrial Applications] The present invention relates to a detector mounting mechanism, and particularly to a detector that moves the detector in three dimensions to measure the desired shape of an object to be measured. Regarding the mounting mechanism.

[Conventional technology]

Generally, in-line measuring equipment used in production lines attaches all the various types of detectors necessary for measurement to the moving part, specifies the detector necessary for measurement from among these detectors, and moves the moving part to xSySz. It moved in the three-dimensional direction of the axis and measured the shape of the workpiece with a designated detector.

In order to protect the detector, the detector mounting mechanism is configured to allow the detector to be relieved in the axial direction and floating in a direction perpendicular to the axial direction.

[Problem to be solved by the invention]

However, in conventional floating systems, the detector is pivoted on a support member and the detector is rotated around the pivot point to release the detector, so the detector is placed parallel to the axial direction of the part to be measured such as a hole. cannot be placed in Therefore, there is a problem that accurate positioning is difficult and measurement accuracy is low.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a detector mounting mechanism that can accurately position a detector on an object to be measured such as a hole.

[Means to solve problems]

In order to achieve the above-mentioned object, the present invention is designed to protect a detector for measuring the shape of an object from shocks, etc. by making it possible to escape in the axial direction of the detector and in the direction orthogonal to the axial direction. In the mounting mechanism of the detector supported on the main body,
A cylindrical mounting mechanism body that is slidably provided in the axial direction of the detector, a buffer means that holds the mounting mechanism body and releases it in the axial direction, and a coaxial It is characterized by comprising a socket of the detector mounting section disposed above, and a guide mechanism provided between the mounting mechanism main body and the socket to allow the socket to escape in the radial direction.

[Effect]

According to the present invention, since the socket is supported by the radial spring and the guide mechanism is provided between the mounting mechanism main body and the socket, the socket is held by the radial spring and is supported in the axial direction of the detector. You can escape by moving parallel in a direction perpendicular to the target. Therefore, the detector can float parallel to the axial direction.

〔Example〕

The mounting mechanism of the detector according to the present invention will be explained in detail below with reference to the accompanying drawings.

As shown in Figures 3 and 5, the inline measuring machine IO 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 section 88, 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 slidably in the Z-axis direction (the axial direction of the moving post 21) in FIG. 3, 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. 4, the three-dimensional drive mechanism 12 is unitized, and the unitized unit is attached to the side surface of a pedestal 24 that supports the low-rise table 18 and the like. Further, the moving shaft 28 can be moved in a three-dimensional direction of X%Y12 axes in FIG. 3 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 since linear scales can be attached to the x and ySz axes of the three-dimensional drive mechanism 12, linear scales can be added to measure the position of the workpiece, etc., when necessary.

Further, a detector mounting portion 14 is provided at the right end portion 28A of the moving shaft 28 in FIG. Detector installed! ff114
As shown in FIG.
A shaft 34 is coaxially protruded and fixed to the left end of the cylinder 31.

This shaft 34 is slidably provided in a recess 36 in the right end portion 28A of the moving shaft 28 together with the cylindrical body 31.

Recessed portion 3 between the left end of the cylinder 31 and the right end 28A of the moving shaft 28
6 is provided with a compression spring 38, and the compression spring 38 is attached to the cylindrical body 3.
1 is biased in the direction of arrow A.

Therefore, when a force in the direction of arrow B in FIG. 1 acts on the detector mounting portion 14, the detector mounting portion 14 can escape in the direction of arrow B against the biasing force of the spring 38 (relieving). A projecting portion 31A is provided at the left end of the cylindrical body 31, so that the detector mounting portion 14 can be positioned at the reference position against the biasing force of the compression spring 38.

A flange 39 is fixed inside the right end portion of the cylinder 31. Bearing rings 40 are attached to both ends of this flange 39.
．． Flanges 42, 46 are provided through 40.

The flanges 42, 46 are components of the socket 33.

Therefore, the socket 33 can slide in a direction perpendicular to the axial direction of the cylindrical body 31.

A spring 52 is attached to the socket 33 as shown in FIGS. 1 and 2.
．． One end of 52.52 is locked at equal intervals, and the spring 52.5
The other end of 2.52 is locked into a socket 54.54.54. Shaft 54.54.54 is motor 56.56
．． 56, and is configured to move in the axial direction under the drive of a motor 56.56.56. Furthermore, the cylinder body 31
A positioning sensor 58 is provided inside the spring 52 , and a motor 56 , 56 , 56 is driven by a signal from the positioning sensor 58 so that the socket 33 is placed at the reference position.
．． 52. Adjust the urging force of 52.

A socket 60 is provided coaxially and slidably inside the socket 33, and a piston portion 6 is provided at the left end of the shaft 60.
2 is formed. Therefore, when air is supplied into the space 64 formed by the socket 33 and the piston portion 62, the shaft 60 can be moved in the six directions of arrows in FIG. A recess made of an inclined surface is formed at the right end of the shaft 60, and a spherical locking member 68 is provided in the recess so as to be movable in the axial direction. Note that the right end portion of the shaft 60 is biased in the direction of arrow B by the biasing force of a compression spring 70.

Furthermore, a flange 71 is slidably provided approximately at the center of the socket 33, and the flange 71 is biased in the six directions of arrows by the biasing force of a compression spring 71A.

Therefore, when air is supplied to the space 64, the shaft 60 moves in the six directions of the arrow, and the locking member 68 is located at the bottom of the recess of the socket 60, so that the insertion part 69 of the detector 32 can be inserted into the socket 33. can. Next, detector 3
When the supply of air to the space 64 is stopped with the insertion portion 69 of No. 2 inserted into the socket 33, the shaft 60 moves in the direction of arrow B in FIG. 1 due to the biasing force of the compression spring 70.
The locking member 68 is moved radially outward on the inclined surface of the recessed portion of the shaft 60 to lock the locking member 68 in the groove 69A formed in the insertion portion 69 of the detector 32.

The detector 32 locked in this manner can be moved in parallel (floating) in a direction perpendicular to the axial direction. Therefore, the detector 32 can be moved parallel to the part to be measured, such as a hole detected in the workpiece 78, so that the detector can be accurately positioned with respect to the part to be measured.

In FIG. 1, the left end surface of the socket 33 has a convex conical surface 33.
A is formed, and a fixing member 61 is provided opposite the conical surface 33A. The fixing member 61 has a concave conical surface 61A.
is formed to fit the convex conical surface 33A. The left end portion of the fixed member 61 is fixed to the piston 61B via a rod 61C. The piston 61B is slidably provided in the cylinder 61D, and the flange 61D
Air can be supplied to the spaces 61E and 61G formed by the piston 61B and the piston 61B. Further, the cylinder 61D is fixed to the projecting portion 31A.

Therefore, when the workpiece 78 is not measured by the detector 32 (that is, when moving the detector 32 or replacing the detector 32), air is supplied to the space 61E and the fixing member 61 is moved as shown by the arrow in FIG. the concave conical surface 61A of the fixing member 61
is brought into contact with the convex conical surface 33A. Thereby, the socket 33 is fixed at the center position.

On the other hand, when measuring the workpiece 78 with the detector 32, the space 6
1G and move the fixing member 61 in the direction of arrow B in FIG.
direction, the concave conical surface 61A and the convex conical surface 33
Release contact with A. Therefore, the socket 33 becomes floating, and the detector 32 can be protected during measurement.

Further, the detector 32 detects the position of the motor 5 by the positioning sensor 58.
6.56.56 is driven to move the shaft 54.54.54 in the axial direction, and the biasing force of the spring 52.52.52 is adjusted to correct the center deviation due to the weight difference. However, the biasing force of the spring 52 may be adjusted manually without using the motor 56. Furthermore, the positioning sensor 58 is a servo motor (not shown) that outputs a signal when the detector 32 is placed at the reference position and moves the detector mounting part 14 in three-dimensional directions.
to drive.

Furthermore, since the detector 32 can be relieved via the detector mounting part 14, the detector etc. can be protected even when the detector 32 cannot be inserted into a part to be measured such as a hole formed in a workpiece. can be achieved. Furthermore, the moving part 28
A limit switch 50 is provided in the recess 36 to stop the measuring device when the detector 32 pings lj IJ-.

A rotor lance 72, 76 for electromagnetic induction is installed inside the right end of the socket 33 and outside the left end of the detector 32.
Since it is equipped with an inner diameter measuring gauge (bore gauge)
The weak signal when using an electric micrometer such as 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.

The detector changer 16 is mounted on a stand 24 as shown in FIG.
is installed via a pedestal 25. The pedestal 25 can be changed into a separate unit depending on the purpose and can be attached to the pedestal 24. Various detectors 16A, 16B, 16 according to measurement items
A storage section 80 that movably stores C..., selects a necessary detector, and places it at a replacement position 80A, and a detector mounting section 1.
4 and a change arm unit 82 for replacing the detector 32 at the replacement position 80A.

The change arm 82A of the change arm unit 82 rotates clockwise in FIG. 3 to replace the detector at the recesses at both ends. In addition, the detectors 16A, 16B, 16C...
is the measurement content of the workpiece 78, for example, inner diameter measurement, outer diameter measurement,
Provided for thread depth measurement, hole depth measurement, etc.

The rotary table 18 is composed of a clamp mechanism that positions the work 78 and a rotary mechanism that rotates the work 78 at an arbitrary angle and holds a part to be measured such as a hole formed in the work 78 at a measurable position. ing. This rotary mechanism employs a direct drive motor (not shown), and allows the setting of any angle (within 360°) through a hole in the table horizontally on the surface of the Rad 18A and obliquely to the Y-axis direction in Figure 3. Also, by rotating the rotary table 18, it can be held in the Y-axis direction and measured.

The control unit 20 is arranged in parallel with the pedestal 24 in FIG.
It is made manually based on the shape of 8.

In addition, in Fig. 1, 84 is the operation panel, 86 is the mask storage section, and 8
8 is a measurement data processing section, 90 is a carry-in line for the work 78, and 92 is a carry-out line for the work 78.

The operation of the detector mounting mechanism according to the present invention constructed as described above will be explained.

First, the operation when performing mastering with the in-line measuring device 10 equipped with a detector mounting mechanism will be explained based on FIG. 6. Step 90 of pressing the start button on the operation panel 84), driving the three-dimensional movement mechanism 12 to place the degree detector 32 of the detector mounting section 14 at the detector replacement position (
Step 92) At the same time, select a desired detector 16A from among the detectors 16A, 16B, 16C, etc. provided in the detector changer 16 and place it in the exchange position 80A (
Step 94). Next, the change arm 82A is operated to exchange the detector 32 provided in the detector mounting portion 14 with the selected detector 16A (step 96). As a result, a new detector 16A is attached to the detector attachment section 14 (step 96).

Next, the three-dimensional movement mechanism 12 is driven, and the mask portion 8
A desired mask is selected from among all the masks provided in the detector 6 (step 98, 100), and the mask is attached to the detector (step 102). Next, mastering is performed (steps 102 and 104). Complete all mask rings using the steps described above (step 10).
6).

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

Next, the operation when measuring the workpiece 78 with the in-line measuring device 10 equipped with a detector mounting mechanism will be explained based on FIG. 7. First, when confirming that the workpiece 78 has been carried in (steps 110 and 112), the three-dimensional movement mechanism 14 is driven as in the case of mask ringing, and the selected detector 16A in the detector changer 16 is moved to the exchange position. 80A (steps 114 and 116). At the same time, the rotary table 18 rotates to hold the wharf 78 at a predetermined measurement position (step 118).

Next, the change arm 82A is rotated clockwise to connect the detector 16A of the detector changer 16 and the detector mounting portion 1.
4, and a new detector 16A is attached to the detector attachment part 14 (step 120).

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 78 is measured (steps 122 and 124). In this case, since the detector 32 can be moved in parallel in a direction orthogonal to the axial direction and floated, the detector 32 can be accurately positioned on the part to be measured of the workpiece 78.

The measurement results are displayed on the measurement data processing section 88 (steps 124, 126, and 128). If the measurement result is not within the tolerance, re-measurement is possible. Thereafter, other parts of the workpiece 78 to be measured are sequentially measured in accordance with the above-described procedure, and the measurement is completed (step 130). After the measurement is completed, the workpiece 78 is carried out (step 132). Hereinafter, new workpieces 78 are sequentially measured using the above-described procedure.

During 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 in the lateral ratio, 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, product, and measurement item of the workpiece.

Therefore, it is possible to provide versatility by replacing only the necessary parts of the unit without changing the entire device.

[Effect of Hathu]

As explained above, according to the detector mounting mechanism according to the present invention, the detector can be moved parallel to the axial direction and floated. The detector can be accurately positioned by moving parallel to the object to be measured, such as a hole.

Therefore, it is possible to improve measurement accuracy.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of a detector mounting mechanism according to the present invention;
2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is an overall perspective view of the detector mounting mechanism according to the present invention, and FIG. 4 is a side view thereof.
FIG. 5 is a block diagram thereof, FIG. 6 is a flowchart during mastering of the mounting mechanism of the detector according to the present invention, and FIG. 7 is a flowchart during measurement. 4...Detector mounting part, 28...Movement axis, 1...
Cylindrical body, 32...Detector, 33...Socket, 9
．． 42.46...flange, 0...bearing, 52...spring, 4...shaft, 56...motor, 8...positioning t
sensor.

Claims (2)

[Claims] (1) In order to protect the detector that measures the shape of the object to be measured from shocks, etc., the detector is supported on the main body so that it can escape in the axial direction of the detector and in the direction orthogonal to the axial direction. The mechanism includes a cylindrical mounting mechanism body that is slidably provided in the axial direction of the detector, a buffer means that holds the mounting mechanism body and releases it in the axial direction, and a radial spring inside the mounting mechanism body. A detector mounting socket characterized by comprising: a socket for mounting the detector coaxially arranged through the socket; and a guide mechanism provided between the mounting mechanism main body and the socket to release the socket in the radial direction. mechanism. (2) The detector mounting mechanism according to claim (1), further comprising means for adjusting the biasing force of the spring in the radial direction to hold the socket on the axis.