JP2000052194A - Metal machining method and metal finishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow temperature correction on real time by correcting coordinate scale of a metal finishing machine at a non-specific temperature according to a distance measured at a specific temperature and a relative displacement measured at the non-specific temperature. SOLUTION: A first displacement δL of a length L is an expansion amount of a master band plate 8. A second displacement δS of a distance between a fixing point and a constant point of displacement sensor bodies 23, 24 is an expansion amount of a machine bed 10. Difference (δL-δS) between the expansion amounts of the master band plate 8 and the machine bed 10 based on the difference between two thermal expansion coefficients is measurement value by displacement sensors 21, 22. In other words, this difference (δL-ϕS) is a relative displacement amount between different metals. Based on this value (δL-δS), temperatures of different metals are corrected. Magnification K of the temperature correction is defined by K = (δL-δS)+La)/La. Where, La is a distance between two points of the master band plate 8 under air condition set to 20 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal working method and a metal working machine, and more particularly to a method for taking a difference in elongation between different kinds of metal of a machine tool when boring a fuselage of a medium-sized aircraft without air conditioning. TECHNICAL FIELD The present invention relates to a metal working method and a metal working machine for converting a coordinate system gauge.

[0002]

2. Description of the Related Art Usually, the temperature of precision machine tools such as lathes and machining centers is strictly controlled. The bed in which the coordinate system of the machine tool is set has a cooling medium passed through it, and the temperature of the bed itself is strictly adjusted. In order to suppress the expansion and contraction of the work, the temperature of the work room is also controlled by air conditioning.

The fuselage of an aircraft is assembled by joining fuselage elements with rivets or the like. Processing for riveting a fuselage element occupying a large area is usually performed in a non-air-conditioned environment. The absolute value of the amount of expansion and contraction of a wide and long fuselage element due to temperature change is large.

[0004] There is known an apparatus for correcting the temperature between different metals of a machine tool in a non-air-conditioned environment, which measures the actual amount of expansion and contraction and changes the gauge of the coordinate system. Such a known correction device is shown in detail in FIGS. In this device, a master made of the same material as the workpiece is installed on the bed of the machine tool, and the absolute value of the expansion and contraction amount of the master is attached to the machine tool, the movement is controlled by its coordinate system, and the movement position is NC machine tool that measures with a touch sensor fixed to a moving body to accurately detect and compares with a reference length of its master measured at a specific temperature to mathematically change a gauge of its coordinate system It is.

FIG. 6 is a plan view of a multi-axis NC machine for trimming the outer periphery of a fuselage shell for a large passenger aircraft and forming a reference hole for assembly. FIG. 7 is a view on the arrow P in FIG. 6 (left side view).

As shown in FIGS. 6 and 7, a work W, which is a fuselage element of a fuselage skin for an aircraft, is formed by upper end surfaces of a straight template 43 and a cross-sectional template 44 provided orthogonal to each other. It is placed on a curved surface. The straight-line template 43 and the cross-sectional template 44 are mounted on a common mounting 33 for the entire machine tool.

In FIG. 6, ranges indicated by reference numerals E and F are portions which serve as positioning references for the work W. FIG.
9 is an enlarged view of a range indicated by reference numeral F. FIG.

In FIG. 8, reference numeral 51 denotes the mounting table 3
3 is a work fixing locator fixed on the work 3. One end of the work W is positioned with respect to the work fixing locator 51 by a fixing pin 41. Here, the reference holes provided in each of the work W and the work fixing locator 51 through which the fixing pins 41 are inserted are both formed in a perfect circle. Are positioned in the X and Y axis directions with respect to the work fixing locator 51.

On the other hand, as shown in FIG. 9, a reference hole formed in the work fixing locator 50 is an elongated hole in the X-axis direction. Therefore, the work W attached to the work fixing locator 50 by the pins 42 is positioned only in the Y-axis direction, and is movable in the X-axis direction. Therefore, at the point in FIG. 9, expansion and contraction (thermal expansion) due to the temperature difference of the work W is absorbed.

As shown in FIG. 6, a master strip 30 is provided on a guide 34 fixed to an installation table 33 so as to extend in the direction in which the workpiece W extends (X-axis direction). Here, the master strip 30 is a strip having the same material as the body outer plate W as a work (worked part), that is, the same thermal expansion coefficient. One end of the master strip 30 is fixed to the mounting table 33 by fixing pins 39. A fixed reference hole 38 is provided in the vicinity of the fixing pin 39.

A free-side reference hole 31 is formed at the other end of the master strip 30. On the installation table 33, a long hole extending in the X-axis direction is formed below the free-side reference hole 31 of the master strip 30, and the other end of the master strip 30 is connected to the long hole and the free-side reference hole. It is attached by a pin inserted into the hole 31. Therefore, the other end of the master strip 30 is a free end in the longitudinal direction, and at this position, expansion and contraction due to the temperature difference of the master strip 30 is absorbed.

A spring 32 whose one end is fixed to a mounting table 33 is attached to a free end of the master strip 30. The master strip 30 is moved in the negative X-axis direction by the spring 32 (FIG. 6). It is always pulled to the left (middle left). Thereby, even when the master strip 30 thermally contracts in the X-axis direction, the straightness of the master strip 30 is maintained.

The pitch between the fixed-side reference hole 38 and the free-side reference hole 31 formed in the master strip 30 is determined in advance.
It is measured by a high-precision measuring instrument under an air-conditioning room set to a reference temperature of 20 degrees C.

As shown in FIG. 7, an X-axis gantry 40 that moves in the X-axis direction is provided above the mounting table 33. The X-axis gantry 40 has a Y-axis table 4
5 are provided. The Y-axis table 45 is provided with a Z-axis column 46 that moves while being guided by the Y-axis table 45 and moves up and down in the Z-axis direction.

The Z-axis column 46 has a C-axis housing 47
The touch sensor 49 is mounted via a spindle motor 48 supported by the C-axis housing 47. With the above configuration, the touch sensor 49
Operate on five axes of X, Y, Z, A, and C.

The pitch between the fixed reference hole 38 and the free reference hole 31 of the master strip 30 is measured using the touch sensor 49. This measurement is performed without air conditioning.

Then, under the non-air conditioning, the touch sensor 49
Are input to the NC machine (device for processing the work W) using the value measured by the above and the value measured using the high-precision measuring device under the above-described air conditioning. The thermal expansion difference between the 5-axis NC machine tool (made of iron) and the master strip 30 (made of aluminum) under non-air conditioning is calculated by a macro program in the NC machine. By adding the data indicating the ratio of the thermal expansion difference to the NC machining program in the NC machining device, the temperature correction machining of the work W under non-air conditioning becomes possible.

The measurement under non-air conditioning is performed by detecting the amount of movement of the iron NC machine tool (the touch sensor 49 attached to the machine tool) in the X-axis direction. X of touch sensor 49
The amount of movement in the axial direction is detected by the X-axis coordinate position measurement function of the NC machine tool.

In such a correction method, it is necessary to measure the distance between two points by the touch sensor 49 at the start of processing of each work W or at predetermined time intervals. The measurement by the touch sensor 49 requires about 5 minutes. When the work W is a part for a large passenger aircraft, a series of machining processes is about two hours, and the measurement time of 5 minutes does not significantly affect the operation rate. However, when the work W is a part of a medium-sized passenger aircraft,
Processing mainly for 30 minutes or less has a large effect on the operation rate for 5 minutes.

In such a correction method, the work W
Cannot respond to the temperature change during the 30 minutes during processing.

It is desired that the time required for measuring the distance between two points for correction can be made substantially zero so that the correction can always be performed in real time.

[0022]

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal working method and a metal working machine in which the time for measurement for correction is substantially zero. Another object of the present invention is to provide a metal working method and a metal working machine that can perform temperature correction in real time. Still another object of the present invention is to provide a metal working method and a metal working machine in which measurement time for correction is substantially zero and temperature correction can be performed in real time.

[0023]

According to the present invention, there is provided a metal working method comprising the steps of: providing a master material formed of the same material as a workpiece; and measuring a distance between two points of the master material at a specific temperature. Measuring the relative displacement between the master material and a metal working machine that processes the work under a non-specific temperature other than the specific temperature, and the distance measured under the specific temperature. Correcting the coordinate system scale of the metal working machine at the non-specific temperature according to the relative displacement measured at the non-specific temperature.

[0024] In the metal working method according to the present invention, the step of measuring a distance between the two points of the master material under the non-specified temperature may include the steps of: Detecting a difference between the distance at the specific temperature and the distance under the specific temperature, wherein the displacement amount measuring means for measuring the relative displacement amount can adjust a relative position with respect to the master material. The displacement amount measuring means is provided at a position where the displacement amount measuring means indicates the value of the difference as a measured value as an initial position before measurement.

According to the metal working method of the present invention, in the metal working method according to claim 1 or 2, the master material comprises:
For the master installation table on which the master material is installed,
The work is mounted in a state substantially equal to a state where the work is mounted on a work setting table on which the work is mounted.

The metal working machine of the present invention is for measuring the relative displacement between the metal working body, the master material formed of the same material as the work, and the metal working machine body and the master material. And a correction unit for correcting the coordinate system scale of the metal working machine body, wherein the correction unit corrects the coordinate system scale according to the relative displacement amount.

In the metal working machine according to the present invention, in the metal working machine according to claim 4, the displacement measuring means is provided so as to be able to protrude and retract from the measuring means main body, and is separated from the measuring means main body. The master material has one end fixed to the metal processing machine main body, the other end is a free end, and the measuring means main body includes the metal member. The tracing stylus is fixed to a processing machine main body, and is provided in a state of being in direct or indirect contact with the other end of the master material.

The metal working machine of the present invention stores data indicating a distance between two points of the metal working body, a master material formed of the same material as the work, and the master material at a specific temperature. Means for measuring a relative displacement between the metal working machine body and the master material under a non-specific temperature other than a specific temperature, a displacement measuring means, and a distance between the two points and Calculating means for calculating a distance corresponding to the two points of the master material under the non-specific temperature from a relative displacement amount, and correcting means for correcting a coordinate system scale of the metal working machine main body. And the correction unit corrects the coordinate system scale according to a calculation result of the calculation unit.

[0029] In the metal working machine according to the present invention, in the metal working machine according to any one of claims 4 to 6, the master material is installed on a master installation table on which the master material is installed. The work is mounted in a state substantially equal to the state of mounting the work on the work installation table to be performed.

The recording medium according to the present invention includes a step of measuring a distance between two points of a master material formed of the same material as a work at a specific temperature, and a step of measuring the distance between the two points of the master material at the specific temperature. Storing data indicating the distance between, and measuring the relative displacement between the master material and the work under a non-specific temperature other than the specific temperature; and Storing the distance between the two points of the master material under the non-specific temperature from the distance measured under the specific temperature and the relative displacement measured under the non-specific temperature. Calculating means for calculating the distance corresponding to, according to the calculation result,
A computer-readable recording medium on which a program for causing a computer to execute each step of the step of correcting the coordinate system scale of the metal working machine at the non-specific temperature is recorded.

In the present invention, the relative displacement is a value indicating a difference between the displacement of the metal working machine body and the displacement of the master material. The displacement amount measuring means indicates the sum of the displacement amount of the metal working machine body and the displacement amount of the master material, instead of a value indicating a difference between the displacement amount of the metal working machine body and the displacement amount of the master material. The value may be measured.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the metal working method of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing this embodiment.
The apparatus shown in FIG. 1 uses the stringer (work) 20 shown in FIG.
It is a device for processing.

In FIG. 1, reference numeral 10 denotes a machine bed. The machine bed 10 is formed with high rigidity as a reference body for specifying a coordinate system of a machine tool connected to the machine bed 10. The mechanical bed 10 is made of iron.

The stringer 20 shown in FIG. 2 is made of aluminum. Therefore, in a non-air-conditioned environment, the iron mechanical bed 10 and the aluminum stringer 20
The difference in thermal expansion coefficient causes a difference in the amount of thermal expansion and contraction. As a result,
The processing of the stringer 20 by the iron machine tool including the machine bed 10 cannot be performed precisely. The device of the present embodiment is a device for correcting the difference in the amount of thermal expansion and contraction and performing precision machining even under non-air conditioning.

As shown in FIG. 1, a master strip 8 is provided on a machine bed 10. The master strip 8 is formed of the same material (aluminum) as the stringer 20, and serves as an index for detecting the amount of thermal expansion and contraction of the stringer 20.

One end (right end in FIG. 1) of the master strip 8 is fixed to a machine bed 10 by a fixing pin 9. That is, the fixed point P at the right end of the master strip 8 fixed by the fixing pins 9 is set as a point that is immovable with respect to the machine bed 10 and cannot move in the X-axis direction.

On the other hand, the other end (left end in FIG. 1) of the master strip 8 is a free end in the longitudinal direction (X-axis direction), similarly to the master strip 30 of the conventional example. Other than the fixed point P of the master strip 8, the master strip 8 can move relative to the machine bed 10 in the X-axis direction.

That is, as shown in FIG. 3, the master strip 8 is provided with a plurality of elongated holes 12 elongated in the longitudinal direction. The plurality of elongated holes 12 are formed on a straight line in the longitudinal direction of the master strip 8. Guide pins 11 are arranged in the respective elongated holes 12, and the master strip 8 is fixed to the machine bed 10 by bolts 17 via the guide pins 11.

Here, the guide pins 11 are formed so as to have clearances in the longitudinal direction and the thickness direction of the master strip 8, respectively, and the tightening force of the bolts 17 is not directly transmitted to the master strip 8. It has become. Therefore, the master strip 8 can be moved in the longitudinal direction except for the fixed point P. The diameter of each elongated hole 12 in the Y-axis direction is substantially equal to the outer diameter of a portion of the guide pin 11 that enters the elongated hole 12. Therefore, the master strip 8 does not move in the Y-axis direction.

As shown in FIGS. 1 and 2, a reference locator 13 having an L-shaped cross section is fixed to a free end of the master strip 8 by bolts 14. The pins 15 are inserted into the reference locator 13 and the master strip 8, whereby the reference locator 13 is aligned with a certain fixed point Q of the master strip 8.

The reference locator 13 is fixed at a position where the rear surface 18 of the rising wall portion 17a that rises in the Z-axis direction is flush with the end surface of the free end of the master strip 8. The back surface 18 of the reference locator 13 is formed as a polished reference surface.

Back surface (reference surface) 18 of reference locator 13
Is pulled together with the master band 8 in the extending direction of the master band 8 by two springs 2 fixed to the machine bed 10. With this tension spring 2,
The straightness of the master strip 8 in the X-axis direction is kept constant.

At the top of the machine bed 10, a displacement sensor support (bracket) 19 is fixedly provided behind the back surface 18 of the reference locator 13. Displacement sensor support 1
9, two displacement sensors 21 and 22 are mounted. The two displacement sensors 21 and 22 have displacement sensor bodies 23 and 24 and displacement portions 25 and 26, respectively. The displacement portions 25 and 26 are respectively provided at the contact tip 2
7, 28 are provided.

The displacement parts 25 and 26 are always in the X-axis direction (the direction orthogonal to the reference plane 18 of the reference locator 13).
Is urged by urging means (not shown) in a direction approaching. Therefore, the contact tips 27 and 28 are always in contact with the reference surface 18.

The displacement sensors 21 and 22 are high-precision position sensors capable of detecting the amount of displacement of the displacement portions 25 and 26 relative to the displacement sensor bodies 23 and 24. The displacement sensors 21 and 22 constantly measure the amount of change in the position of the reference locator 13 (master strip 8). Displacement sensor 2
One of the sensors 1 and 22 is a main sensor (reference sensor), and the other is a slave sensor (comparison sensor) used as a reference when one of the sensors fails.

As shown in FIG. 1, the distance between the fixed point (the center of the fixed pin 9) P and the reference surface 18, that is, the distance L between two points on the master strip 8 is previously determined at the reference temperature. It is measured by a high-precision length measuring instrument under air conditioning set at a certain 20 ° C. (this measured value at 20 ° C. under air conditioning is La).

Next, in a non-air-conditioned state, the machine tool has a distance L between two points between the fixed point P and the reference plane 18 without using the displacement sensors 21 and 22. It is measured by the X-axis coordinate reading function. The measurement here is
As described below, it is for adjusting the zero point (initial setting) of the displacement sensors 21 and 22. Therefore, the adjustment is performed by the machine tool without using the displacement sensors 21 and 22.
That is, the measurement here is only once at the start of use.

Thus, the distance La between the two points 20 degrees C below
The difference ΔL between the distance and the distance L between the two points under non-air conditioning is calculated. Next, the displacement sensors 21 and 22 are fixed to the machine bed 10 in a state where they are positioned at positions where the read numbers (measured value results) of the displacement sensors 21 and 22 are ΔL. That is, the value of ΔL, which is the difference between the two-point distance La under 20 degrees C and the two-point distance L under non-air conditioning, is biased, and the displacement sensors 21 and 22 are biased.
Adjust the zero point of.

For example, the distance La between two points at 20 ° C. (measured by a high-precision length measuring instrument) is 50,000 mm,
If the distance between two points under non-air conditioning (X-axis coordinate value by mechanical operation) L is 4999.5 mm, the displacement sensors 21 and 22 are located at positions where the output values of the displacement sensors 21 and 22 are −0.5 mm.
Attach 2.

As shown in FIG. 4, the displacement sensors 21 and 22
Output signals indicating relative displacement amounts are displacement sensor controllers 31a and 31 which are dedicated controllers, respectively.
is input to the program execution unit 32a via the terminal b. FANUC SYSTE as the program execution unit 32a
M18-MC (product name) is used.

The program execution unit 32a includes a PMC connection unit input card 33a and a PMC / CPU 3
4a and an NC control section macro conversion area 35. NC control section macro conversion area 35
Is the central control unit. The displacement sensor controllers 31a and 31b are connected to the PMC connection unit input card 33a.

The data indicating the relative displacement is input to the PMC / PMC via the PMC connection unit input card 33a.
It is stored in the CPU 34a. And PMC / CPU3
By the internal output of 4a, data indicating the relative displacement is finally stored in the NC conversion section macro conversion area 35.

Next, the operation of the present embodiment will be described.

The master strip 8 expands and contracts in the X-axis direction with the fixed point P as a starting point in response to a disturbance such as a change in the outside air temperature. If the master strip 8 and the machine bed 10 are made of the same material, they expand and contract theoretically with the same expansion rate. Master strip 8 of the same material as the workpiece
Is generally a different material than the machine bed 10. In the case of the present embodiment, the mechanical bed 10 is made of iron, and the master strip 8 is made of aluminum. Aluminum has a thermal expansion coefficient of 0.000
02303 / ° C, and the thermal expansion coefficient of iron is 0.000
0117 / ° C.

As shown in FIG. 1, the above-mentioned first variation (not shown) δL of the length L is the amount of expansion and contraction of the master strip 8. Second change amount (not shown) of distance S between two points between fixed point P and fixed points (not shown) of displacement sensor bodies 23 and 24.
δS is the amount of expansion and contraction of the mechanical bed 10. The difference (δL−δS) between the expansion and contraction amount of the master strip 8 and the mechanical bed 10 based on the difference between the two thermal expansion coefficients is represented by displacement sensors 21 and 2.
2 is the measured value. That is, this difference (δL−δS)
Is the relative displacement between different metals.

Based on this value (δS−δL), the temperature between different metals is corrected. The temperature correction magnification K is defined by the following equation. K = (measured values of displacement sensors 21 and 22 + length of master strip 8 under 20 ° C.) / (Length of master strip 8 under 20 ° C.) = ｛(ΔL−δS ) + La) / La (1) where La is the distance between two points of the master strip 8 under the air conditioning set at 20 ° C. as described above.

By using this temperature correction magnification K as the scaling magnification (gauge conversion) of the X-axis coordinate of the NC machine tool, it is equivalent to performing processing at a constant temperature of 20 ° C. Such a gauge conversion can be performed substantially in real time. Since the execution time of a program described later is several microseconds, the gauge can be converted every several microseconds.

Next, how the measured displacement amount is used for temperature correction between dissimilar metals will be described.

FIG. 5 shows a program chart of the temperature correction executed based on the data indicating the relative displacement stored in the NC control section macro conversion area 35 (see FIG. 4) as described above. .

When the main program starts (step 1), the program progresses to the machining origin macro (step 2), and each axis of the machine tool (including the five axes described above).
Moves to the processing origin which is the operation origin (step 3). Next, coordinate setting is performed for each axis (step 4), and the program proceeds to a temperature correction macro (step 5).

In the temperature correction macro, the unit display of the relative displacement stored in the NC control section macro conversion area 35 is changed. The relative displacement amount in μm units stored in the NC control unit macro conversion area 35 is changed to mm units (step 6). Then, 1
It is checked whether or not the relative displacement of the 6-bit BIN binary number is negative (step 7). If it is negative, its absolute value is calculated and a negative sign is added to it (step 9). If it is positive, go to step 10.

In step 10, the actual length of the distance L between the two points under non-air conditioning (outside air temperature) at the time of execution of the main program is determined by using the relative displacements whose units and signs are adjusted as described above. , Is calculated as the numerator of the above equation (1).

Using this calculated value, a temperature correction magnification (scaling magnification value) K defined by the above equation (1) is calculated (step 11). The coordinate value (scale) of the X-axis coordinate system is reset by this temperature correction magnification K, that is, scaling is performed. A functional command is executed so as to operate in each axis by a command in which the magnification K of the calculation result is added to each axis operation command of the NC program (step 12). As a result, each axis of the machine operates on the coordinate system reset based on the temperature correction, and machining such as drilling is performed.

A machine tool calculated and controlled on this coordinate system is equivalent to a machine tool placed in an air-conditioned room at 20 ° C.
The control equivalent to the air conditioning is always performed without measuring the temperature.

Conventionally, it corresponds to the numerator of the above formula (1) (the measured value of the displacement sensor + the length of the master strip under 20 ° C.), that is, the master zone corresponding to the change of the outside air temperature under non-air conditioning. The value of the actual length of the plate is obtained by the X-axis coordinate reading function of the machine tool, and it takes about 5 minutes to perform this measurement. On the other hand, in the present embodiment, since the value corresponding to the numerator in the above (1) can be obtained by the execution time of one block of the NC program, the processing time as a whole can be reduced, and the processing of a large number of pieces can be performed. This has a great effect on improving the operation rate of the NC machine.

In the above embodiment, the master strip 8 made of the same material (in this example, aluminum) as the object to be processed is used as a substitute for the object to be processed (work). As a substitute for the machine tool, a master strip made of the same material as the machine bed (iron in this example) may be used.

Further, as in the above-described embodiment, when a master strip of the same material is used as a substitute for one of the target metals of the workpiece (work) and the machine bed (machine tool), The amount of expansion and contraction due to a change in outside air temperature under non-air conditioning greatly changes depending on how the master strip is installed. That is, the point is how to make the installation state of the master strip plate equal to the installation state of the target metal.

For example, taking the above conventional example as an example, the work W is placed on the straight-line template 43 and the cross-sectional template 44, but there is almost no contact area between the two templates 43, 44 and the work W. Correspondingly, the master band plate 30 may be installed with almost no contact area with the installation table 33. on the other hand,
In the above embodiment, since the stringer 20 as the work is placed on the stringer fixing jig 7c in a state where the entire lower surface thereof is in contact with the stringer fixing jig 7c, the master band plate 8 also contacts the machine bed 10 with the entire lower surface thereof. It is installed in a state where it has been let.

Generally speaking, one of the object to be machined and the machine tool (the object metal) and the master strip are attached by the same method so that they extend and contract by the same amount at the same speed in synchronization. I just need.

[0071]

According to the metal working method of the present invention, a step of providing a master material formed of the same material as one of a work and a metal working machine for working the work; Measuring a distance between two points of the master material, and measuring a relative displacement between the master material and one of the other of the workpiece and the metal working machine under a non-specific temperature other than the specific temperature. When,
Correct the coordinate system scale of the metal working machine at the non-specific temperature according to the distance measured at the specific temperature and the relative displacement measured at the non-specific temperature. Therefore, the temperature between dissimilar metals between the machine tool and the workpiece can be corrected in a non-air-conditioned environment in real time, and the operating rate of the non-air-conditioned machine tool can be increased.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a metal working machine according to the present invention.

FIG. 2 is a perspective view showing a work of the present embodiment.

FIG. 3 is a sectional view taken on line AA of FIG. 1;

FIG. 4 is a circuit unit diagram for calculating an output result of a displacement sensor.

FIG. 5 is a flowchart illustrating a temperature correction macro and the like.

FIG. 6 is a plan view showing an example of a conventional metal working machine.

FIG. 7 is a side view showing the apparatus of FIG. 6;

FIG. 8 is an enlarged plan view showing a part of the apparatus shown in FIG. 6;

FIG. 9 is an enlarged plan view showing a part of the apparatus shown in FIG. 6;

[Explanation of symbols]

 2 Spring 8 Master strip 9 Fixing pin 10 Mechanical bed 11 Guide pin 12 Slot 13 Reference locator 14 Bolt 15 Pin 17 Bolt 17a Rising wall 18 Back surface 19 Bracket 20 Stringer 21 Displacement sensor 22 Displacement sensor 23 Displacement sensor body 24 Displacement Sensor body 25 Displacement part 26 Displacement part 27 Contact tip part 28 Contact tip part 30 Master strip 31a Displacement sensor controller 31b Displacement sensor controller 32 Spring 32a Program execution unit 33 Installation stand 33a PMC connection unit input card 34 Guide 34a PMC / CPU 35 NC control section macro conversion area 43 Straight line template 44 Cross section template L Distance between two points P Fixed point Q Fixed point S Distance between fixed point P and fixed point of displacement sensor W W Click

Claims (8)

[Claims] A step of providing a master material formed of the same material as a workpiece; a step of measuring a distance between two points of the master material at a specific temperature; and a step of measuring a non-specific temperature other than the specific temperature. Measuring the relative displacement between the master material and the metal working machine that processes the workpiece under the distance, the distance measured under the specific temperature, and the measured under the non-specific temperature. Correcting the coordinate system scale of the metal working machine under the non-specific temperature in accordance with the relative displacement amount. 2. The metal working method according to claim 1, further comprising: measuring a distance between the two points of the master material under the non-specified temperature; Detecting a difference from the distance at a specific temperature, wherein the displacement amount measuring means for measuring the relative displacement amount is provided so as to adjust a relative position with respect to the master material, and the displacement amount The metal working method, wherein the measuring means is provided at a position where the displacement amount measuring means indicates the value of the difference as a measured value as an initial position before the measurement. 3. The metal working method according to claim 1, wherein the master material is provided on a work installation table on which the work is installed, with respect to a master installation table on which the master material is installed. A metalworking method that can be installed in a state that is approximately the same as the mounting state. 4. A metal working machine main body, a master material formed of the same material as a work, and a displacement measuring means for measuring a relative displacement between the metal working machine main body and the master material. And a correction unit for correcting a coordinate system scale of the metal processing machine main body, wherein the correction unit corrects the coordinate system scale according to the relative displacement amount. 5. The metal working machine according to claim 4, wherein the displacement measuring means is provided so as to be able to protrude and retract from the measuring means main body, and is biased in a direction away from the measuring means main body. The master material has one end fixed to the metal working machine main body, the other end is a free end, and the measuring means main body is fixed to the metal working machine main body. The metal working machine, wherein the probe is provided in a state of directly or indirectly contacting the other end of the master material. 6. A metalworking machine main body, a master material formed of the same material as a workpiece, and means for storing data indicating a distance between two points of the master material at a specific temperature. Displacement amount measuring means for measuring a relative displacement amount between the metal working machine main body and the master material under a non-specific temperature other than a temperature, the distance from the two points and the relative displacement amount, Comprising: a calculating means for calculating a distance corresponding to the two points of the master material under a non-specific temperature; and a correcting means for correcting a coordinate system scale of the metal working machine main body, wherein the correcting means comprises: A metal working machine that corrects the coordinate system scale according to a calculation result of the calculation means. 7. The metal working machine according to claim 4, wherein the master material is provided on a master installation table on which the master material is installed and on a work installation table on which the work is installed. A metal working machine to be mounted in a state substantially equal to the state of mounting the work. 8. A step of measuring a distance between two points of a master material formed of the same material as the workpiece at a specific temperature, and indicating a distance between the two points of the master material at the specific temperature. Storing data; measuring a relative displacement between the master material and the workpiece under a non-specific temperature other than the specific temperature; and storing data indicating the relative displacement. The distance corresponding to the distance between the two points of the master material under the non-specific temperature from the distance measured under the specific temperature and the relative displacement measured under the non-specific temperature. Calculating means for calculating, and a program storing a program for causing a computer to execute each step of correcting the coordinate system scale of the metal working machine under the non-specific temperature according to the calculation result. Computer-readable recording medium.