JPS59180318A - Position detector - Google Patents

Abstract

PURPOSE:To measure center coordinates of a hole to be measured speedily and easily by positioning a measuring element by an origin positioning pin and then inserting it into the hole to be measured. CONSTITUTION:One end surface of the measuring element 10 is fixed to the reverse surface of the lower table 4 of the XY table 2 consisting of a couple of upper and lower tables which are slidable in X and Y directions, and the other end is formed in such a shape that it can be inserted into the hole to be measured. A Z-directional driving source fixed to the upper table 3 is fitted with one terminal of the origin positioning pin 13, and the other terminal is fitted in the tapered hole. Then, displacement sensors 7a and 7b which measure the extents of movement on the X and Y axes while fixed to the table 2 measure the center coordinates of the hole speedily and easily. Further, the measuring element 10 is inserted into the hole once to measure the position shift from a reference position, so the measurement is carried out efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Scope of the Invention] The present invention relates to a position detector, and more particularly to a device for measuring the amount of deviation of the center coordinates of a hole drilled in a block or the like from a reference value.

[Technical background of the invention and its problems]

Conventionally, the center coordinates of a round hole are measured using a three-dimensional measuring instrument, as shown in Figures 1 and 2, by moving the measuring tip (1 ) to find the X-coordinate of the center of the hole (H), then apply the probe (1) to the left and right walls on the X-axis to find the X-coordinates of each. The midpoint between these two values is the X coordinate of the center of the hole (H) to be sought. Using this method, it is possible to accurately determine the center coordinates of the hole (H), but it has the disadvantage that the measurement takes a long time and is unsuitable for measurement on an automated line or the like.

[Purpose of the invention]

An object of the present invention is to provide a hole position detector that can quickly and easily measure the center coordinates of a hole on an automated line, etc., and that can easily locate the origin of a displacement sensor for measuring the amount of deviation. It is about providing.

[Summary of the invention]

After positioning the probe fixed to an XY table that can be slid in the XY directions using the origin positioning pin, insert the probe into the hole of the object to be measured, and determine the center coordinates of the hole using the displacement sensor fixed to the XY table. I tried to measure it.

[Embodiments of the invention]

The details of the present invention will be explained below with reference to the illustrated embodiments.

3 is a cross-sectional view of one embodiment of the position detector of the present invention, FIG. 4 is a cross-sectional view taken along the line B--B in FIG. 33, and FIG. These third. 4th. In Fig. 5, the XY table (2) has an 6d) so that they can freely slide in the X and Y directions, which are orthogonal to each other. The middle plate (5) has a displacement sensor (7a) that determines the amount of movement in the X direction and a displacement sensor (7a) that determines the amount of movement in the Y direction.
A displacement sensor (7b) for measuring the amount is attached to each table (3) (
4) respectively fixed sensor holders (8a, 3b)
), and the target (9a) fixed to the X table (3) and the target (9b) fixed to the Y table (4) determine the movement amount in the X direction and the Y
The amount of movement in each direction can be measured independently. Furthermore, a fixed plate 00) is fixed to the lower surface of the Y table (4). The fixed image of the measuring head α0) has a tapered hole that is the axis of the measuring head ← An air cylinder (12+) is fixed through an XY stopper (1υ) that limits the operating range of the insertion even when the axis of the inserted hole is inclined. A tapered origin positioning pin α (a) is attached to the recess, and the XY stopper (IIJ) is fitted with a trap so that it can slide in two directions through the bearing α (a) fitted in it.On the other hand, the air cylinder ( 12
At the top end there is a dog (which turns on and off the limit switches (15, 16) for checking the operation of the air cylinder).
17a, 17b) are attached. The limit switches (15, 16) are attached to the L cedar board that connects the XY table (2) and the Z table (1~) with limit switch fixtures (20a, 20b). Pin holders (21a), (21b) and (21C), (21d) are fixed to the m++ surface of the and Y table (4), respectively, and the spring mounts attached to the bottle holders (213 to 21d) Pin (2
The springs (24a to 24
d) is stretched. The XY table (2) adjusts the spring mounting pins (22a to 22d) and attaches the springs (24a to 2
By changing the tension of 4d), the origin positioning pin 0j and the tracing stylus α0) are adjusted to be substantially coaxial. The above-mentioned 2 tapes /1/(11) are escapes when the probe (10) cannot be inserted into the hole drilled in the object to be measured.
) nK The attached dog QO is confirmed by turning on and off the limit switch (2) attached to the limit switch fixture (5). This limit switch fixture is fixed to the two table mounting plates. The force that causes the Z table 18 to start sliding is determined by the spring-mounted pins (308 to 308).
It is determined by the tension of the springs (31a, 31b) stretched over the springs (30d), and is adjusted to an appropriate size in advance. In addition, spring mounting bins (30a), (30b
) is L cedar board CIIK, matahane mounting hinge (30C), (
30d) The dog shaft "
(c) is installed. The operating range of the Z table bet is the Z direction stopper holder fixed to the 2 table mounting plates t2 and the Z direction stopper 0 identified on the L cedar board (1).
4). Also, this position detector has 2
x'yz (not shown) by the table mounting plate (29),
It is attached to a chain that can move in four directions.

Figure 6 shows the overall configuration of the device.

The entire device consists of the position detector (100), sensor output display section (35a, 35b), ■10 C36)
, memory L3 power, υ from CPU (38), ■10 side, memory 07) ; CPU CJ$ are mutually connected to address bus 431. f-tabus section, control bus (4υ connection. Displacement sensors in the X and Y directions sent via (35b) <7a), (7
There is an output of b). - Display section (35a) for force output signal.
, (35b).

A method of measuring a position detector having such a configuration will be explained. FIG. 7 is a flowchart showing the operation of the entire apparatus during measurement. In Fig. 7, when the power of the entire device is first turned on, the air cylinder 0 is lowered in step 1, and the taper hole of the air cylinder (origin positioning pin (13) attached to 12 and contact point 00) is Fit together. This state is detected by turning on the limit switch fi5 in step 2, and the limit switch fi5) is turned on.
If it does not turn on, it is determined that there is an abnormality in the air cylinder <12+, and the entire apparatus stops. Also, when the origin positioning bin (13) and tosisochi (151) are turned on, the displacement sensor (7a) in the X and Y directions is activated in step 3.
, (7b) is reset, and then the air cylinder (Iz
rises. As in step 2, if the limit switch (16) does not turn on in step 5, it is determined that there is an abnormality in one of the air cylinders and the entire device stops. (2) Origin finding is completed.XY table (2)
(1) When the origin search is completed and measurement is started in step 6, the position detector starts moving in the XYZ directions (not shown) by the movable external device in step 7, and is placed in the object to be measured (not shown). inserted into the hole.

If there is a hole in the object to be measured, or if there is a large misalignment between the hole and the probe 00), in order to prevent a large force from being applied to the probe 00,
The Z table (18) slides. Z-table (1
The slide of the tip is detected by turning on the mint switch (28), and the entire apparatus is stopped in step 8. The measurement head α0) was successfully completed in step 8.
is inserted into the hole, the outputs of the displacement sensors (7a), (7b) in the X and Y directions are latched by step 9, and this value is then read by step 10. As a result, the axis of the air cylinder (121 and the measuring head C1
Since the amount of deviation from the axis of O) is known, the amount of deviation of the center coordinates of the hole in the #dill constant when the axis of the air cylinder () is set as the reference position can be measured. Next step 1
1, the position detector (1) is raised by a device movable in the XYZ directions, and the measurement for one hole drilled in the object to be measured is completed. After this, the entire apparatus returns to step 6, and when the predetermined pick-up period is about to be completed, it makes a loop from step 6 to step 11.

As described above, this position detection if? , the probe αO is fixed to the lower table (4) of the XY table which can be slid in the X and Y directions, and this probe (10) is fixed to the upper table (
After positioning by the origin positioning pin (I3) which is moved by the air cylinder circle fixed to 3), the measuring point 00) is moved to Mill! By inserting a fixed object, the pressure at the center of the hole can be measured quickly and easily. In addition, the light of the measuring head (10) “4”
As shown in Figure 8, the hole (H) is shaped like an abacus bead.
), the number of faces between the holes is reduced, so the hole is 4ζ1! Even if there is an inclination between If the slope θ is less than or equal to -+D-d θ=SIn (□), the hole (1-1
), and the positional deviation of the hole from the reference position can be measured by inserting the probe once into one hole as described above. This method enables more efficient measurement than the previous method.

The present invention can accommodate holes with different diameters by using a stepped probe. Also, a solenoid may be used in place of the air cylinder.
In addition, various changes can be made without being limited to the above embodiments without departing from the spirit of the invention.

〔Effect of the invention〕

The measuring tip is fixed on the XY table, and after the measuring tip is positioned in the origin positioning bin, it is inserted into the hole of the hidden treasure, so the center coordinates of the hole can be measured quickly and easily. I can do it. However, since the positional deviation from the upper level can be measured by inserting the probe into the hole once, it is possible to measure more efficiently than the conventional method.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of a method for determining the center coordinates of a hole using a three-dimensional measuring device, Figure 3 is a cross-sectional view of a position detector that is an embodiment of the invention, and Figure 4 is a cross-sectional view of a position detector that is an embodiment of the invention. Fig. 3 is a side view seen from the hole direction, Fig. 5 is a cross-sectional view taken along line B-B in Fig. 3, and Fig. 6
7 is a flowchart showing the operation of the entire device during measurement, and FIG. 8 is a diagram showing the relationship between the hole in the object to be measured and the probe. (1, 1...Position detector, (2)...XY
Table, (3)... Upper table, (4)... Lower table, (7a, 7b)... Displacement sensor, αυ)
...Measuring head, θ2...Air cylinder, (1
31... Origin positioning bin, Z table. Yoshihito Patent Attorney Yu Norichika (and 1 other person) Natsu 1 Kuchi Shita 2 Figure 28 Page 6 Figure 13 Figure 4 Kuguchi 5 Figure ■ 7 Figure

Claims (1)

[Claims] An XY table consisting of a pair of upper and lower tables that can be slid in the XY directions, and one end surface of the lower table of the XY table is identified on the lower surface, and this end surface has a tapered hole, and the other end is the one to be measured. a measuring tip having a square shape that can be inserted into a hole in an object; an origin positioning pin having one end attached to a Z-direction drive source fixed to the upper table of the XY table and the other end fitting into the tapered hole; The detector is equipped with a displacement sensor that is fixed to the XY table and measures the amount of movement for each of the XY axes.