JP7365377B2 - Measuring device and method - Google Patents

Description

The present disclosure relates to a measuring device and a measuring method.

It is known that cutting tools are used to process structural parts.

For example, Patent Document 1 discloses a technique for adjusting the amount of protrusion of the tip of a cutting tool used in a machine tool.

Japanese Patent Application Publication No. 2002-166338

Structural parts may require dishing.
A cutting tool called a countersink is used to process such a dish shape, but in order to process a dish shape with an appropriate depth, it is necessary to adjust the amount of protrusion of the countersink blade relative to the microstopper.
However, the blade of the countersink is inclined with respect to the axial direction of the countersink.
Therefore, with the technique disclosed in Patent Document 1, it is difficult to adjust the amount of protrusion of the blade of the countersink relative to the microstopper.

An object of the present disclosure is to provide a measuring device and a measuring method that can easily adjust the amount of protrusion of a countersink blade with respect to a microstopper.

In order to solve the above problems, a measuring device according to the present disclosure includes a measuring section that includes a measuring probe that has a first contacting section that can come into contact with a blade of a countersink, and a measuring probe that can come into contact with a contacting surface of a microstopper. a base having a second contact portion, and the measurement probe is movable in the axial direction of the countersink with respect to the base.

In the measurement method according to the present disclosure, the blade of the countersink is applied to a first contact portion of a measurement probe that is movable in the axial direction of the countersink relative to the base, and the contact surface of the microstopper is aligned with the base. Push the measurement probe until it contacts the second contact portion.

According to the measuring device and measuring method of the present disclosure, it is easy to adjust the amount of protrusion of the blade of the countersink relative to the microstopper.

FIG. 1 is a perspective view of a measuring device according to an embodiment of the present disclosure. 2 is a sectional view taken along line II-II in FIG. 1. FIG. 3 is a flowchart of a measurement method according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the measurement device in a step of preparing a temporarily adjusted countersink according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the measuring device in a step of abutting a blade according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the measuring device at a step of pushing a countersink according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the measuring device in a step of abutting a contact surface according to an embodiment of the present disclosure.

Hereinafter, each embodiment of the present disclosure will be described using the drawings. In all the drawings, the same or corresponding structures are given the same reference numerals, and common explanations are omitted.

<Embodiment>
A measuring device according to a certain embodiment will be described with reference to FIGS. 1 to 7.

(Overall configuration of measuring device)
As shown in FIG. 1, the measuring device 1 includes a measuring section 10 and a base 20.
For example, the measuring device 1 may be equipment for adjusting a tool set for processing a structural part of an aircraft or the like into a dish shape.
For example, the measuring device 1 may be a facility for adjusting the position of the countersink blade relative to the microstopper.
For example, the measuring device 1 may be a facility for measuring the amount of protrusion of a blade of a countersink with respect to a microstopper.

(Composition of tool set)
As shown in FIG. 2, the tool set TS includes a countersink CS and a microstopper MS.
The countersink CS is a cutting tool for machining a structural component into a dish shape.
The microstopper MS is a support structure for supporting the countersink CS, and is also a mechanism for stopping dish-shaped cutting at a predetermined depth.
For example, the microstopper MS has a contact surface MC at one end.
For example, the contact surface MC may be the lower surface of the hollow cylindrical resin MP included in the microstopper MS.
The micro stopper MS fixedly supports the countersink CS at a position where the protrusion amount AP of the blade TT with respect to the contact surface MC is a predetermined value in the axial direction DA of the countersink CS.
When cutting into a dish shape with such a tool set TS, cutting can be performed to a position where the contact surface MC contacts one surface of the structural component.
Therefore, the depth of the plate shape of the structural component processed by the countersink CS matches the protrusion amount AP of the blade TT of the countersink CS with respect to the contact surface MC.
For example, the countersink CS may have a pilot part PT for guiding the cutting direction.
For example, the pilot part PT may have a rod shape that further extends from the tip of the blade TT in the axial direction DA of the countersink CS.

(Configuration of measurement section)
The measurement section 10 includes a measurement probe 11.
The measurement probe 11 has a first contact portion 111 that can come into contact with the blade TT of the countersink CS.
The measurement probe 11 is movable in the axial direction DA of the countersink CS with respect to the base 20.
For example, the measurement probe 11 may be able to move forward and backward relative to the base 20 in the axial direction DA of the countersink CS.
For example, the axial direction DA may be a vertical direction.

For example, the measurement probe 11 may be able to be fitted into the opening 202 of the base 20 from above the base 20.
For example, the measurement probe 11 may be able to move in and out of the opening 202 of the base 20 in the axial direction DA.
For example, the measurement probe 11 may have a central axis 112 that is coaxial with the opening 202 of the base 20.
For example, the measurement probe 11 may have a cylindrical shape coaxial with the opening 202 of the base 20.
For example, the measurement probe 11 may be configured to sink into the opening 202 of the base 20 by being pushed in the axial direction DA by the blade TT of the countersink CS.

For example, the first contact portion 111 may be dish-shaped and recessed.
For example, the first contact portion 111 may be recessed in the axial direction DA.
For example, the first contact portion 111 may have a dish shape that narrows toward the inside of the measurement probe 11 from the side closer to the blade TT of the countersink CS.

For example, the measurement probe 11 may have a relief hole 113 extending from the first contact portion 111 in the axial direction DA.
For example, the escape hole 113 may communicate with a dish-shaped recess of the first contact portion 111 and further extend from the first contact portion 111 toward the inside of the measurement probe 11 .
For example, the escape hole 113 is thicker and longer than the pilot part PT so that the measurement probe 11 can escape from the pilot part PT of the countersink CS when the blade TT of the countersink CS is in contact with the first contact part 111. It may have a shape.

For example, the measuring section 10 may further include a micrometer 12, a stretching section 13, and an elastic mechanism 14.

The micrometer 12 is a displacement meter for measuring the relative position of the measurement probe 11 in the axial direction DA.
The micrometer 12 includes a measurement surface 121, a display section 122, and a base section 123.
In the micrometer 12, the measurement surface 121 can move forward and backward from the base 123 in the axial direction DA.
For example, the measurement surface 121 may have a circular shape whose center is located on the central axis 112 of the measurement probe 11.
For example, the micrometer 12 may measure the relative position of the measurement surface 121 in the axial direction DA as the relative position of the measurement probe 11 in the axial direction DA.
For example, the micrometer 12 may be able to measure the relative position of the measurement probe 11 in the axial direction DA by bringing the measurement surface 121 into contact with the lower end of the extension portion 13.
For example, the micrometer 12 may measure the relative position of the measurement probe 11 in the axial direction DA with respect to the reference position, using a pre-stored reference position as a zero value.
For example, the micrometer 12 may display the measured relative position of the measurement probe 11 on the display unit 122.

The extending portion 13 has a cylindrical shape extending in the axial direction DA from the measurement probe 11 toward the measurement surface 121.
For example, the extending portion 13 may move back and forth in the axial direction DA in conjunction with the movement of the measurement probe 11 into and out of the opening 202 .
For example, the upper end of the extension section 13 may be coupled to the measurement probe 11 within the opening 202.
For example, the lower end of the extending portion 13 may face the measurement surface 121.
For example, the extending portion 13 may be coaxial with the measurement probe 11.

The elastic mechanism 14 applies bias to the measurement probe 11 in the axial direction DA with respect to the base 20.
The elastic mechanism 14 biases the measurement probe 11 in a direction opposite to the direction in which the measurement probe 11 sinks into the opening 202 .
For example, the elastic mechanism 14 may bias the measurement probe 11 toward the blade TT of the countersink CS.
For example, the elastic mechanism 14 may bias the measurement probe 11 so that the upper end of the elastic mechanism 14 pushes up the lower surface of the measurement probe 11.
For example, the elastic mechanism 14 may be a coil spring provided coaxially with the measurement probe 11 so that the extension portion 13 passes through it.
For example, the elastic mechanism 14 may be coaxial with the measurement probe 11.

(Base configuration)
As described above, the base 20 has the opening 202.
For example, the opening 202 may house the elastic mechanism 14.
For example, the measurement probe 11 may be housed in the opening 202 so as to be retractable in the axial direction DA.
For example, the extending portion 13 may extend within the opening 202 in the axial direction DA.
For example, opening 202 may have a cylindrical shape.

The base 20 further includes a second contact portion 201 that can come into contact with the contact surface MC of the micro stopper MS.
For example, the second contact portion 201 may be a plane facing the contact surface MC.
For example, the second contact portion 201 may be a hollow circle whose center is located on the central axis 112 of the measurement probe 11 .

For example, the base 20 may further include a protrusion 203 that protrudes from the outer periphery of the opening 202 toward the center of the opening 202 at the lower end of the opening 202 so that the lower end of the elastic mechanism 14 can be placed thereon.
For example, the base 20 may have a hollow portion 204 that can accommodate the micrometer 12.
For example, the base 20 may include a fixed base 206 that secures the base 123 of the micrometer 12 to the bottom 205.
For example, the opening 202 may be a hole that penetrates the base 20 in the axial direction DA from the surface having the second contact portion 201 to the hollow portion 204.

For example, the base 20 may further include a pilot check hole 207 that can check the outer diameter of the pilot part PT.

(motion)
The operation of the measuring device 1 of this embodiment will be explained.
This operation corresponds to an embodiment of the measurement method.
The operator performs each step shown in FIG.

For example, the operator may first set the reference protrusion amount AP0 in advance (ST01: step of setting the reference protrusion amount).
For example, with a tool set (master) that has already been adjusted to be able to machine a dish shape with an appropriate depth by actually machining several dish shapes, the operator can adjust the countersink blade against the micro stopper. The amount of protrusion may be measured by the measuring device 1 and set as the reference amount of protrusion AP0.
For example, the operator may set the standard protrusion amount AP0 to a zero value and store it in the micrometer 12.

Following the implementation of ST01, the operator prepares a provisionally adjusted countersink CS, as shown in FIG. 4 (ST02: step of preparing a provisionally adjusted countersink).
For example, in ST02, the operator may temporarily adjust the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
For example, in ST02, the operator may prepare a tool set TS in which the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS has been temporarily adjusted.

Following the implementation of ST02, the operator places the countersink CS on the base 20 (ST03: step of placing).
For example, the operator may place the tool set TS on the base 20 in which the protrusion amount AP of the blade TT of the countersink CS relative to the microstopper MS has been temporarily adjusted.

Following the implementation of ST03, as shown in FIG. Apply the blade TT (ST04: step of applying the blade).
For example, in ST04, the operator may contact the temporarily adjusted blade TT of the counter sink CS with the first contact portion 111.

Following the implementation of ST04, the operator pushes in the measurement probe 11, as shown in FIG. 6 (ST05: step of pushing in the measurement probe).
In ST05, the operator pushes the measurement probe 11 until the contact surface MC of the microstopper MS contacts the second contact portion 201 of the base 20, as shown in FIG.
For example, in ST05, the operator may push the measurement probe 11 in the axial direction DA while keeping the blade TT in contact with the first contact portion 111.

Following ST05, the operator compares the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS with the reference protrusion amount AP0 (ST06: step of comparing).
For example, in ST06, the operator may measure the difference between the protrusion amount AP and the reference protrusion amount AP0 in the state shown in FIG.
For example, in ST06, the operator may read the measurement value of the micrometer 12 in which the standard protrusion amount AP0 is stored as a zero value, as the difference between the protrusion amount AP and the standard protrusion amount AP0.
For example, in ST06, the operator may determine whether the difference between the protrusion amount AP and the reference protrusion amount AP0 is within a tolerance value. In this case, the tolerance value may be a value that is allowed for the depth of the dish shape to be machined for the mechanical component.
For example, in ST06, the operator may determine whether the difference between the protrusion amount AP and the reference protrusion amount AP0 is a zero value to determine whether the protrusion amount AP0 is within the allowable value.

If the difference between the protrusion amount AP and the reference protrusion amount AP0 is within the allowable value (ST06: Yes), it is assumed that the adjustment of the protrusion amount AP of the blade TT of the countersink CS with respect to the micro stopper MS has been completed, and the measurement method is ended.
If the difference between the protrusion amount AP and the reference protrusion amount AP0 is not within the allowable value (ST06: No), adjust the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS (ST07: step of adjusting the protrusion amount), Return to ST03.

(action and effect)
According to this embodiment, the relative position of the measurement probe 11 in the axial direction DA is related to the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
Therefore, the operator can measure the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS by measuring the position of the measurement probe 11 in the axial direction DA.
Therefore, according to the measuring device 1, it is easy to adjust the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS.

Generally, bolts are sometimes used to fasten structural parts. In this case, the structural parts require processing to insert bolts.
For example, a hole for inserting a countersunk bolt requires processing into a countersunk shape.
For example, it is necessary to provide a dish-shaped relief called a fillet relief in the insertion hole of a bolt with a protruding head.
To machine the dish shape of the appropriate depth in the structural part, a countersink fixed to a microstop is used as a cutting tool. The counter sink cuts the surface of a structural component by rotating a blade that is inclined with respect to the axial direction of the counter sink around the axial direction, thereby processing the dish shape. When the surface of the structural component is cut until the dish shape reaches a specified depth, the contact surface of the microstopper comes into contact with the surface of the structural component. Therefore, it is possible to process a shape with a specified depth.
Therefore, in order to process a dish shape with a specified depth, it is necessary to appropriately adjust the amount of protrusion of the countersink blade relative to the microstopper.

As Comparative Example 1, it is assumed that an operator adjusts the amount of protrusion of the countersink blade relative to the microstopper by bringing the measurement surface of the micrometer into direct contact with the countersink blade.
However, since the blade of the countersink is inclined with respect to the axial direction of the countersink, in Comparative Example 1, it is difficult for the operator to uniquely identify the position of the blade of the countersink.
On the other hand, according to the present embodiment, the position of the blade of the countersink can be specified by measuring the position of the measurement probe 11. Easy to measure AP.

As Comparative Example 2, assume that the operator adjusts the amount of protrusion of the countersink blade relative to the microstopper by actually machining a dish shape on a structural part and measuring the depth of the machined dish shape. .
However, in Comparative Example 2, since at least cutting is required to actually process the dish shape, the operator is physically burdened to adjust the amount of protrusion of the countersink blade relative to the microstopper.
In contrast, according to the present embodiment, the protrusion amount AP of the blade TT of the countersink CS relative to the microstopper MS can be adjusted without actually machining the dish shape, so the physical load on the worker is reduced. be done.

According to an example of the present embodiment, the micrometer 12 allows the operator to numerically evaluate the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
Therefore, the operator can adjust the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS without relying on intuition or tricks.

According to an example of the present embodiment, since the measurement probe 11 can move in and out of the opening 202 of the base 20 in the axial direction DA, the measurement device 1 presses the countersink CS against the measurement probe 11 in the axial direction DA. It has a simple structure.
Therefore, according to the measuring device 1, the operator can easily measure the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS.

According to an example of the present embodiment, the first abutting part 111 is dish-shaped and concave, so that the first abutting part 111 has a structure that can make wide contact with the blade TT of the countersink CS.
Therefore, the measured protrusion amount AP tends to show a stable value.

According to an example of the present embodiment, since the first contact part 111 has the relief hole 113 extending in the axial direction DA, when the first contact part 111 contacts the blade TT of the countersink CS, the measuring device 1 has a structure that allows the pilot part PT of the countersink CS to escape.
Therefore, in measuring the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS, the pilot part PT is unlikely to interfere.

According to an example of the present embodiment, the standard protrusion amount AP0 is set in advance and the protrusion amount AP of the blade TT with respect to the microstopper MS is compared with the standard protrusion amount AP0, so that the operator approaches the preset standard. As such, it is easy to adjust the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS.

According to an example of the present embodiment, in order to measure the difference in the protrusion amount AP with respect to the reference protrusion amount AP0 in the comparison, the operator determines whether or not the protrusion amount AP of the countersink CS should be adjusted with respect to the micro stopper MS. It is easy to understand how much adjustment should be made.

According to an example of the present embodiment, in order to adjust the protrusion amount AP so that the difference is within an allowable value, the operator follows a standard that has already been adjusted to a state where a plate shape with an appropriate depth can be machined. , the protrusion amount AP of the blade TT of the counter sink CS relative to the micro stopper MS can be adjusted.

<Modified example>
In the example of the embodiment described above, the measurement unit 10 includes the micrometer 12 as a displacement meter, but any displacement meter may be used as long as it can measure the relative position of the measurement probe 11 in the axial direction DA.
As a modification, the measurement unit 10 may include a laser displacement meter as the displacement meter.

In the example of the embodiment described above, the base 123 of the micrometer 12 is fixed to the bottom 205 of the base 20 by the fixing base 206, but if the base 123 of the micrometer 12 is fixed to the base 20, , may be configured in any way.
As a modification, the base 123 of the micrometer 12 may be fixed to the base 20 by being fixed to an arm hanging down from the top of the base 20.

In the example of the embodiment described above, the process returns to ST03 after performing ST07, but the process may be performed in any manner as long as the protrusion amount AP of the blade TT of the countersink CS relative to the microstopper MS can be adjusted.
As a modification, if the protrusion amount AP of the blade TT can be adjusted with the measurement probe 11 pushed in (for example, the state shown in FIG. 7), the process may return to ST06 after performing ST07.

Although the embodiments of the present disclosure have been described above, these embodiments are presented as examples and are not intended to limit the scope of the disclosure. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the disclosure. These embodiments and variations thereof are included within the scope and gist of the disclosure.

<Additional notes>
The measuring device 1 and the measuring method described in the above embodiment can be understood, for example, as follows.

(1) The measuring device 1 according to the first aspect includes a measuring section 10 including a measuring probe 11 having a first contacting section 111 that can come into contact with the blade TT of a countersink CS, and a contacting surface MC of a microstopper MS. and a base 20 having a second contact portion 201 that can be brought into contact with the base 20, and the measurement probe 11 is movable in the axial direction DA of the countersink CS with respect to the base 20.

According to this aspect, the relative position of the measurement probe 11 in the axial direction DA is related to the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
Therefore, the operator can measure the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS by measuring the position of the measurement probe 11 in the axial direction DA.
Therefore, according to the measuring device 1, the operator can easily adjust the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.

(2) A measuring device 1 according to a second aspect is the measuring device 1 according to (1), in which the measuring section 10 further includes a micrometer 12.

According to this aspect, the operator can numerically evaluate the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
Therefore, the operator can adjust the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS without relying on intuition or tricks.

(3) The measurement device 1 according to the third aspect is the measurement device 1 according to (1) or (2), in which the measurement probe 11 can move in and out of the opening 202 of the base 20 in the axial direction DA. be.

According to this aspect, the measurement device 1 has a structure that allows the countersink CS to be easily pressed against the measurement probe 11 in the axial direction DA.
Therefore, according to the measuring device 1, the operator can easily measure the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS.

(4) The measuring device 1 according to the fourth aspect is the measuring device 1 according to either (1) or (3), in which the first contact portion 111 is recessed in a dish shape.

According to this aspect, the first contact portion 111 has a structure that can widely contact the blade TT of the countersink CS.
Therefore, the measured protrusion amount AP tends to show a stable value.

(5) The measuring device 1 according to the fifth aspect has the above-mentioned measurement probe 11 having a relief hole 113 extending from the first contact portion 111 in the axial direction DA (1) or (4). This is a measuring device 1.

According to this aspect, the measuring device 1 has a structure that allows the pilot part PT of the countersink CS to escape when the first contact part 111 contacts the blade TT of the countersink CS.
Therefore, in measuring the protrusion amount AP of the blade TT of the counter sink CS with respect to the micro stopper MS, the pilot part PT is unlikely to interfere.

(6) In the measurement method according to the sixth aspect, the blade TT of the countersink CS is attached to the first contact portion 111 of the measurement probe 11 which is movable in the axial direction DA of the countersink CS with respect to the base 20. The measurement probe 11 is pushed in until the contact surface MC of the microstopper MS contacts the second contact portion 201 of the base 20.

According to this aspect, the relative position of the measurement probe 11 in the axial direction DA is related to the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.
Therefore, the operator can measure the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS by measuring the position of the measurement probe 11 in the axial direction DA.
Therefore, according to the measurement method, the operator can easily adjust the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS.

(7) The measurement method according to the seventh aspect is the measurement method according to (6), in which a reference protrusion amount AP0 is set in advance, and the protrusion amount AP of the blade TT with respect to the microstopper MS is compared with the reference protrusion amount AP0. It is.

According to this aspect, the operator can easily adjust the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS so that it approaches a preset standard.

(8) The measuring method according to the eighth aspect is the measuring method according to (7), in which the difference between the protrusion amount AP and the reference protrusion amount AP0 is measured in the comparison.

According to this aspect, it is easy for the operator to understand whether or not to adjust the countersink CS to the microstopper MS and to what extent the countersink CS should be adjusted.

(9) A measuring method according to a ninth aspect is the measuring method according to (7), in which the protrusion amount AP is adjusted so that the difference falls within an allowable value.

According to this aspect, the operator can adjust the protrusion amount AP of the blade TT of the countersink CS with respect to the microstopper MS, following the standard that has already been adjusted so that a dish shape with an appropriate depth can be processed.

1 Measuring device 10 Measuring part 11 Measuring probe 12 Micrometer 13 Extension part 14 Elastic mechanism 20 Base 111 First contact part 112 Central axis 113 Escape hole 121 Measurement surface 122 Display part 123 Base part 201 Second contact part 202 Opening 203 Projecting part 204 Hollow part 205 Bottom 206 Fixing base 207 Pilot check hole AP Projection amount CS Counter sink DA Axial direction MC Contact surface MP Resin MS Micro stopper PT Pilot part TS Tool set TT Blade

Claims (11)

a measurement section including a measurement probe having a first contact section that can come into contact with the blade of the countersink;
A base having a second contact part that can come into contact with the contact surface of the micro stopper,
The measurement probe is movable in the axial direction of the countersink with respect to the base ,
The measuring device in which the first contact portion is recessed in a dish shape . The measurement unit further includes a micrometer ,
The measuring device according to claim 1 , wherein the base has a hollow portion that can accommodate the micrometer . The measuring section further includes a stretching section and an elastic mechanism,
The micrometer includes a measurement surface,
The extending portion extends in the axial direction from the measurement probe toward the measurement surface,
the elastic mechanism biases the measurement probe in the axial direction with respect to the base;
The extending portion passes through the elastic mechanism.
The measuring device according to claim 2. The base further includes an opening in which the elastic mechanism is housed, and a protrusion protruding from the outer periphery of the opening toward the center of the opening,
The elastic mechanism is placed on the protrusion.
The measuring device according to claim 3. The measurement device according to claim 4 , wherein the measurement probe can move in and out of the opening in the axial direction. The measuring device according to any one of claims 1 to 5 , wherein the dish shape is narrowed and concave toward the inside of the measurement probe from the side closer to the blade . The measurement device according to any one of claims 1 to 6 , wherein the measurement probe has an escape hole extending in the axial direction from the first contact portion. applying the blade of the countersink to a first contact portion of a measurement probe that is movable in the axial direction of the countersink relative to the base;
pushing the measurement probe until the contact surface of the microstopper contacts the second contact portion of the base;
A measurement method in which the first contact portion is recessed in a dish shape . Set the standard protrusion amount in advance,
The measuring method according to claim 8 , wherein the amount of protrusion of the blade relative to the microstopper is compared with the reference amount of protrusion. 10. The measuring method according to claim 9 , wherein in the comparison, a difference between the protrusion amount and the reference protrusion amount is measured. The measuring method according to claim 10 , wherein the protrusion amount is adjusted so that the difference is within an allowable value.

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