JP4176550B2 - Work hole drilling state measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece hole portion drilling state measuring device that measures the drilling state of various structural holes drilled in a workpiece such as a cylinder block of a vehicle engine, for example. The present invention relates to a workpiece hole portion drilling state measuring device that reliably measures the penetration state of a structural hole, the crossing state of a plurality of holes, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a cylinder block of a vehicle engine has various structural holes in a machining process, such as a crank hole through which a crankshaft passes, two balance sub-holes through which two right and left balancer shafts pass, and the right and left balancers. Between the bush holes, an oil hole perpendicular to the longitudinal direction of the holes and an oblique hole intersecting with the oil hole at an intermediate portion of the oil hole are formed by machining. After that, the oil holes drilled between the left and right balun smash holes are filled with plugs at both ends in the final process.
[0003]
And in the inspection process of the cylinder block processing completion state, since it was difficult to visually confirm the penetration state of the oil hole, in particular, the tip portion of the linear rod bent in an L shape conventionally. The inspection rods are inserted into the left and right balun smash holes, respectively, and the penetration state of the oil hole is confirmed by checking whether or not an L-shaped bent part enters the oil hole opened at a predetermined depth. It was.
[0004]
In addition, as another conventional example, in order to inspect the penetration and burrs remaining of the oil hole of the work produced by the die cast machine, the oil hole of the work produced by the die cast machine is imaged by an imaging device, and this imaging is performed. There is a workpiece inspection device in which the presence / absence and position of a defective portion remaining in the oil hole through / burr remaining is identified by a defective portion identification unit based on the result, and the identification result is displayed on a display device (Patent Document) 1).
[0005]
[Patent Document 1]
Japanese Patent No. 3125964 (pages 1 and 2, FIGS. 1 and 2)
[0006]
[Problems to be solved by the invention]
However, in such a conventional example, using an inspection rod bent in an L shape, the rod is inserted into each of the left and right balun smash holes and bent in an L shape in an oil hole formed in a direction perpendicular to the balun smash holes. In order to confirm the penetration state of the oil hole by checking whether or not the part has entered, even though the inlet part of the oil hole can be confirmed, the oil hole has penetrated the entire length between the left and right balun smash holes. There was a possibility that it could not be reliably inspected. Moreover, it was not possible to confirm the crossed state of the oblique holes formed so as to intersect with the oil holes in the middle of the oil holes.
[0007]
In addition, the workpiece inspection apparatus described in Patent Document 1 requires an imaging device, an imaging control unit, a defective part identification unit, a display control unit, and the like, and the configuration of the entire apparatus is complicated and sophisticated. In addition, there is a possibility that it cannot be applied to the measurement of the drilling state of various structural holes in the inspection process of the machining completion state of a workpiece having a complicated shape such as a cylinder block.
[0008]
Therefore, the present invention addresses such problems, and can reliably measure the penetrating state of various structural holes, the crossing state of a plurality of holes, and the like in the inspection process of the workpiece machining completion state. An object of the present invention is to provide a drilling state measuring device.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a workpiece hole drilling state measuring device according to the present invention includes first, second and third structural holes formed substantially parallel to the central axis in the longitudinal direction of a block-shaped body. A first hole to be measured that is formed between the first and second structural holes and perpendicular to the longitudinal direction of the holes, and the first hole to be measured is formed at an intermediate portion of the first hole to be measured. Positioning means for positioning a workpiece having a second hole to be measured formed so as to intersect with one hole to be measured to a measurement position; inserted into three structural holes of the workpiece positioned by the positioning means; Each of the first and second measurement bars provided with three measurement bars and inserted into the first and second structural holes has a light projecting unit that emits light toward the first hole to be measured, and the light The third measurement bar that has a light receiving portion and is inserted into the third structural hole can be advanced and retracted into the second measured hole. A measuring means having a light receiving section or a blocking section; a moving means for moving the three measuring bars of the measuring means forward and backward toward the workpiece at the measuring position; and controlling the operation of each of the above components and from the measuring means And a control unit for inputting measurement signals and displaying measurement results.
[0010]
With such a configuration, the workpiece is positioned at the measurement position by the positioning means, the measurement means having three measurement bars is moved forward and backward by the moving means toward the workpiece at the measurement position, and the three measurement bars of the measurement means are measured. Is inserted into the three structural holes of the workpiece, the penetrating state of the hole to be measured and the crossing state of multiple holes are measured by the operation of the light projecting part and the light receiving part, etc., and the measurement signal from this measuring means is input The measurement result is displayed by the control unit. This makes it possible to reliably measure the penetrating state of various holes, the intersecting state of a plurality of holes, and the like when the workpiece has been processed.
[0011]
The light projecting unit and the light receiving unit provided on the first and second measurement bars measure the penetration state of the first hole to be measured drilled in the workpiece. Thus, the light from the light projecting portion provided in the first measurement bar is detected by the light receiving portion provided in the second measurement bar, thereby ensuring a penetration state over the entire length of the first hole to be measured. Can be measured.
[0012]
Further, the light projecting section and the light receiving section provided in the first and second measurement bars measure the cross-sectional area of the first hole to be measured drilled in the workpiece. Thereby, the cross-sectional area of the first hole to be measured is detected by detecting the light receiving area received by the light receiving unit provided in the second measurement bar with the light from the light projecting unit provided in the first measurement bar. Can be measured.
[0013]
And the light projection part and light-receiving part provided in the said 1st and 2nd measurement bar measure using a laser beam. Thereby, the penetration state and cross-sectional area of a hole can be measured correctly.
[0014]
In addition, the light receiving section or the blocking section provided in the third measuring bar cooperates with the light projecting section and the light receiving section provided in the first and second measurement bars, and the first light receiving section or the blocking section provided in the first measuring bar is formed in the workpiece. The crossing state of the second measured hole and the first measured hole is measured. Accordingly, the light from the light projecting unit provided in the first measurement bar is received by the light receiving unit provided in the third measurement bar or blocked by the blocking unit, so that the second measured hole and the first It is possible to reliably measure the state of intersection with the measured hole.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic plan view showing an embodiment of a workpiece hole drilling state measuring apparatus according to the present invention. This workpiece hole portion drilling state measuring device measures the drilling states of various structural holes drilled in a workpiece such as a cylinder block of a vehicle engine, for example. As shown in FIG. The measuring device 2, the moving mechanism unit 3, and the control panel 4 are provided.
[0016]
The loading unit 1 serves as positioning means for positioning, for example, a cylinder block 5 as a workpiece at the measurement position A, and the cylinder block 5 conveyed on a conveyance line B composed of a large number of conveyance rollers 6a and 6b. It is configured to receive, move in the direction of arrow C, position it at the measurement position A set at its end, move the cylinder block 5 after the measurement in the direction of arrow D, and return it to the transport line B.
[0017]
Here, the cylinder block 5 as a workpiece | work is demonstrated with reference to FIG. The cylinder block 5 is a main part that generates power in an automobile engine. For example, a crankshaft passes a crankshaft substantially parallel to the central axis in the longitudinal direction (depth direction in FIG. 2) of the block-shaped main body 7. A hole (third structure hole) 8, a first balance hole (first structure hole) 9 a and a second balance hole (second structure hole) 9 b through which the left and right balancer shafts pass respectively. An oil hole (first hole to be measured) 10 perpendicular to the longitudinal direction of the first and second balun smash holes 9a and 9b and an intermediate portion of the oil hole 10 Diagonal holes (second holes to be measured) 11a, 11b and the like intersecting with the oil holes 10 are formed by machining.
[0018]
As shown in FIG. 1, a measuring device 2 is provided on the side of the measurement position A set at the end of the loading unit 1. The measuring device 2 is configured to drill oil holes 10 as first holes to be measured and oblique holes 11a and 11b as second holes to be measured with respect to the cylinder block 5 positioned at the measurement position A by the loading unit 1. The first measuring bar 12, the second measuring bar 13, and the third measuring bar 14 serve as measuring means for measuring the installation state.
[0019]
The measuring apparatus 2 will be further described with reference to FIGS. The first measurement bar 12 is inserted into the first balance hole 9a formed in the cylinder block 5, and a light projecting portion 15 that emits light toward the oil hole 10 at the tip thereof. Is provided. The light projecting unit 15 is composed of, for example, a laser oscillator that generates laser light. The second measuring bar 13 is inserted into a second balun smash hole 9b similarly formed in the cylinder block 5. The tip of the second measuring bar 13 is inserted into the oil hole 10 from the light projecting part 15 described above. A light receiving unit 16 that receives the light emitted toward is provided. The light receiving unit 16 includes a laser receiver that receives laser light, for example. The light projecting unit 15 and the light receiving unit 16 measure the penetrating state and cross-sectional area of the oil hole 10 as the first hole to be measured. In addition, the other light projection parts 17a and 17b are provided in the intermediate part of the said 1st measurement bar 12 at predetermined intervals.
[0020]
The third measurement bar 14 is inserted into the crank hole 8 formed in the cylinder block 5 and receives light at the same interval as the other light projecting portions 17a and 17b. Portions 18a and 18b or blocking portions are provided. The light receiving portions 18a and 18b or the blocking portions can be advanced and retracted into the oblique holes 11a and 11b that are formed so as to intersect the oil hole 10 in FIG. In cooperation with the light projecting section 15 and the light receiving section 16 provided in the cylinder block 5, the oblique holes 11a and 11b as the second hole to be measured drilled in the cylinder block 5 and the oil hole as the first hole to be measured 10 is measured. In addition, the said light-receiving part 18a, 18b or the interruption | blocking part can be advanced or retracted in the said diagonal holes 11a, 11b using an air cylinder, for example.
[0021]
3 and 4, reference numeral 19 denotes an attachment member for the first measurement bar 12, the second measurement bar 13, and the third measurement bar 14.
[0022]
As shown in FIG. 1, a moving mechanism unit 3 is provided below the measuring device 2. The moving mechanism 3 serves as a moving means for moving the three measuring bars 12, 13, and 14 of the measuring device 2 forward or backward toward the cylinder block 5 positioned at the measuring position A. FIG. As shown, a guide rail 21 is stretched horizontally on the upper surface side of the stage 20 provided in the horizontal direction, and a drive motor 22 is attached to one end of the stage 20. A drive shaft 23 such as a ball screw connected to the rotation shaft is stretched in parallel to the guide rail 21. Then, the mounting member 19 of the measuring device 2 is slidably mounted on the guide rail 21, and the mounting member 19 is connected to a moving block (not shown) screwed to the drive shaft 23. ing. As a result, due to the rotation of the drive shaft 23 by the rotational drive of the drive motor 22, the entire measuring device 2 moves forward in the direction of arrow E toward the cylinder block 5 or moves back in the direction of arrow F.
[0023]
A control panel 4 is provided in the vicinity of the measuring device 2 as shown in FIG. The control panel 4 serves as a control unit that controls the operation of the loading unit 1, the measuring device 2, and the moving mechanism unit 3 and displays a measurement result by inputting a measurement signal from the measuring device 2. An operation panel for operating the CPU, a CPU (Central Processing Unit) as a control circuit, a display panel for displaying the measurement results, and the like.
[0024]
Next, the operation of the workpiece hole drilling state measuring apparatus configured as described above will be described. First, in FIG. 1, a cylinder block 5 as a workpiece is transported by a transport line B constituted by transport rollers 6 a and 6 b and is received by the slide base of the loading unit 1. Here, the operator presses a start button provided on the operation panel of the control panel 4.
[0025]
Then, the workpiece hole drilling state measuring device starts operating, the slide base of the loading unit 1 is raised, and the cylinder block 5 is lifted by about 50 mm, for example. In this state, the slide base moves in the direction perpendicular to the conveyance line B as indicated by the arrow C and reaches the measurement position A. At that position, the slide base descends and the cylinder block 5 is seated at the measurement position A. At this seating position, the seating state of the cylinder block 5 is confirmed using a sensor (for example, an air pressure sensor). Then, the cylinder block 5 is clamped and fixed. In this state, the model of the cylinder block 5 may be confirmed by a model discrimination unit (not shown).
[0026]
Next, the operation panel of the control panel 4 is operated to check whether the measurement functions of the three measurement bars 12, 13, and 14 of the measurement device 2 are operating normally. When it is confirmed that the measurement function is operating normally, in FIG. 5, the drive motor 22 is rotationally driven in a predetermined direction, and the entire measuring device 2 is advanced in the direction of arrow E toward the cylinder block 5. At this time, as shown in FIG. 2, the first measurement bar 12 is inserted into the first balun smash hole 9a formed in the cylinder block 5, and the second measurement bar 13 is slid into the second balun smash hole 9b. The third measurement bar 14 is inserted into the crank hole 8.
[0027]
Here, as shown in FIG. 3, in the longitudinal direction of the cylinder block 5, four positions P ₁ , P ₂ , P ₃ and P ₄ are set at equal intervals from the front side of the measurement bars 12, 13 and 14. and, among them, and the first oil hole 10a in accordance with the first position P ₁ is bored, the second oil hole 10b in accordance with the third position P ₃ are bored To do.
[0028]
In this state, in FIG. 3, the light projecting portion 15 at the front end portion of the first measurement bar 12 and the light receiving portion 16 at the front end portion of the second measurement bar 13 are inserted to the position of the first position P ₁ . The light projecting unit 15 and the light receiving unit 16 are aligned with the axis of the first oil hole 10a. Then, a laser beam is emitted from the light projecting unit 15 and received by the light receiving unit 16. At this time, if the laser beam from the light projecting unit 15 is correctly detected by the light receiving unit 16, it can be measured that the first oil hole 10a penetrates the entire length. Then, as shown in FIG. 6, in the control panel 4 of the display panel 24 above, for example, "through state" of the first oil hole 10a as a result of the measurement at the code P ₁ is displayed.
[0029]
Also, as shown in FIG. 7, the laser beam irradiation width is made larger than the diameter of the first oil hole 10a, and the laser light is scanned across from one side to the other side of the diameter of the oil hole 10a. Thus, the cross-sectional area of the oil hole 10a can be measured. At this time, assuming that one scan width divided into a large number in the diameter direction of the oil hole 10a is W and the length of light crossing the oil hole 10a in the direction orthogonal to the scan width W is L, every scan width W The area S through which light passes is expressed as S = W × L. Each time the laser beam scans the oil hole 10a, the light lengths L ₁ , L ₂ , L ₃ ,..., Ln are measured, and the areas S ₁ , S ₂ , S ₃ ,. , Sn is measured, the cross-sectional area of the oil hole 10a can be measured by the sum of the areas S ₁ , S ₂ , S ₃ ,. Thereby, it is possible to measure whether or not the first oil hole 10a is drilled in a correct shape with a predetermined cross-sectional area. In FIG. 6, “cross-sectional area” of the first oil hole 10 a is displayed as a measurement result on the display panel 24 of the control panel 4, for example, at a symbol P ₁ .
[0030]
Next, in FIG. 3, by inserting the light receiving portion 16 of the first light projecting portion 15 and the second measuring bars 12 of the measuring bars 13 to the position of the second position P _2, the first oil hole 10a The light projecting portion 17a provided on the front side of the intermediate portion of the first measurement bar 12 and the light receiving portion 18a provided on the front side of the intermediate portion of the third measurement bar 14 are aligned on the axis. As shown in FIG. 2, the light receiving portion 18a of the third measurement bar 14 is inserted into the oblique hole 11a so as to emit light from the light projecting portion 17a of the first measurement bar 12. Then, by receiving the light from the light projecting unit 17a by the light receiving unit 18a, it can be measured that the first oil hole 10a and the oblique hole 11a intersect correctly. Then, in FIG. 6, in the control panel 4 of the display panel 24 above, for example, "cross state" of the first oil hole 10a and the diagonal hole 11a as a result of the measurement at the reference numeral P ₂ is displayed.
[0031]
Next, in FIG. 3, the light projecting portion 15 of the first measurement bar 12 and the light receiving portion 16 of the second measurement bar 13 are inserted to the position of the third position P ₃ , and the second oil hole 10 b is inserted. The light projecting unit 15 and the light receiving unit 16 are aligned on the axis. Then, a laser beam is emitted from the light projecting unit 15 and received by the light receiving unit 16. At this time, if the laser beam from the light projecting unit 15 is correctly detected by the light receiving unit 16, it can be measured that the second oil hole 10b penetrates over the entire length. Then, as shown in FIG. 6, the “penetration state” of the second oil hole 10 b is displayed as a measurement result on the display panel 24 of the control panel 4, for example, at a symbol P ₃ .
[0032]
Next, in FIG. 3, the light projecting portion 15 of the first measurement bar 12 and the light receiving portion 16 of the second measurement bar 13 are placed at a predetermined position between the third position P ₃ and the fourth position P _4. And is provided on the axis of the first oil hole 10a on the rear side of the intermediate part of the first measuring bar 12 and the intermediate part of the third measuring bar 14 on the rear side of the intermediate part of the first measuring bar 12. The light receiving portion 18b is matched. Then, as shown in FIG. 2, the light receiving portion 18 b of the third measurement bar 14 is inserted into the other oblique hole 11 b so as to emit light from the light projecting portion 17 b of the first measurement bar 12. Then, by receiving the light from the light projecting unit 17b by the light receiving unit 18b, it can be measured that the first oil hole 10a and the other oblique hole 11b intersect correctly. In FIG. 6, on the display panel 24 of the control panel 4, the “crossing state” of the first oil hole 10a and the other oblique hole 11b is displayed as a measurement result, for example, at reference numerals P _{3 to} P _4. Is done.
[0033]
Next, in FIG. 3, the light projecting portion 15 of the first measurement bar 12 and the light receiving portion 16 of the second measurement bar 13 are inserted to the position of the fourth position P ₄ , and the second oil hole 10b is inserted. The light projecting portion 17a provided on the front side of the intermediate portion of the first measurement bar 12 and the light receiving portion 18a provided on the front side of the intermediate portion of the third measurement bar 14 are aligned on the axis. As shown in FIG. 2, the light receiving portion 18a of the third measurement bar 14 is inserted into the oblique hole 11a so as to emit light from the light projecting portion 17a of the first measurement bar 12. Then, by receiving the light from the light projecting unit 17a by the light receiving unit 18a, it can be measured that the second oil hole 10b and the oblique hole 11a intersect correctly. Then, in FIG. 6, in the control panel 4 of the display panel 24 above, for example, "cross state" of the second oil hole 10b and the diagonal hole 11a as a result of the measurement at the code P ₄ is displayed.
[0034]
Thereby, the drilling states of the first and second oil holes 10a and 10b shown in FIGS. 2 and 3 and the oblique holes 11a and 11b drilled so as to intersect the respective oil holes 10a and 10b are measured. The Next, as shown in FIG. 5, the drive motor 22 is rotationally driven in the reverse direction, and the entire measuring device 2 is moved backward in the direction of arrow F. Thereafter, as shown in FIG. 6, the above measurement results are displayed on the display panel 24 of the control panel 4 to determine pass / fail of the hole to be measured.
[0035]
Then, the cylinder block 5 is moved from the measurement position A in the direction of the arrow D by the loading unit 1 shown in FIG. Then, it conveys to a predetermined position with the conveyance line B, and complete | finishes the measurement of the hole drilling state about the cylinder block 5 as a workpiece | work.
[0036]
In the above description, the third measurement bar 14 is provided with the light receiving portions 18a and 18b in FIG. 3, but the present invention is not limited to this, and the blocking portions 18a and 18b are used instead of the light receiving portions. May be provided. In this case, it is necessary to provide a light receiving portion on the second measurement bar 13 at a location corresponding to the light projecting portions 17 a and 17 b provided on the first measurement bar 12. The first and second oil holes 10a and 10b and the respective oil holes are detected by detecting that the light blocking parts 18a and 18b block the light between the light projecting parts 17a and 17b and the light receiving part. It is possible to measure the crossing state of the oblique holes 11a and 11b drilled so as to cross 10a and 10b.
[0037]
In the above description, the workpiece has been described as the cylinder block 5. However, the present invention is not limited to this, and any other device may be used as long as it measures the drilling state of various structural holes drilled in the workpiece. The same thing can be applied as a workpiece.
[0038]
【The invention's effect】
Since the present invention is configured as described above, according to the first aspect of the present invention, the workpiece is positioned at the measurement position by the positioning means, and the measurement means having three measurement bars is moved to the measurement position by the moving means. Advance toward the workpiece, insert the three measuring bars of the measuring means into the three structural holes of the workpiece, and the operation of the light projecting part and the light receiving part etc., the penetration state of the hole to be measured, the intersecting state of multiple holes, etc. The measurement signal from the measurement means can be input and the measurement result can be displayed by the control unit. This makes it possible to reliably measure the penetrating state of various holes, the intersecting state of a plurality of holes, and the like when the workpiece has been processed. Therefore, in the work completed state of the workpiece, it is possible to smoothly proceed to the next assembly process.
[0039]
According to the second aspect of the present invention, the light from the light projecting unit provided in the first measurement bar is received and detected by the light receiving unit provided in the second measurement bar. The penetration state over the entire length of the measurement hole can be reliably measured. Therefore, it can be measured whether the 1st to-be-measured hole has penetrated correctly over the full length.
[0040]
Furthermore, according to the invention according to claim 3, by detecting the light receiving area received by the light receiving unit provided in the second measurement bar, the light from the light projecting unit provided in the first measurement bar, The cross-sectional area of the first hole to be measured can be measured. Therefore, it can be measured whether or not the first hole to be measured is drilled in a correct shape with a predetermined cross-sectional area.
[0041]
And according to the invention which concerns on Claim 4, the light projection part and light-receiving part provided in the 1st and 2nd measurement bar measured the penetration state and cross-sectional area of a hole by measuring using a laser beam. Accurate measurement is possible.
[0042]
Further, according to the invention according to claim 5, by receiving the light from the light projecting unit provided in the first measurement bar by the light receiving unit provided in the third measurement bar or blocking by the blocking unit, It is possible to reliably measure the intersecting state between the second hole to be measured and the first hole to be measured drilled in the workpiece.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an embodiment of a workpiece hole drilling state measuring device according to the present invention.
FIG. 2 is a side view showing a cylinder block as a workpiece and three structural holes and a hole to be measured formed in the cylinder block.
FIG. 3 is an enlarged plan view showing a state where three measurement bars are inserted into three structural holes of a cylinder block.
FIG. 4 is an enlarged front view showing a measuring apparatus.
FIG. 5 is an enlarged front view showing the measuring apparatus and the moving mechanism unit (reverse to FIG. 1).
FIG. 6 is an explanatory diagram showing a state in which a measurement result by the measuring device is displayed on the display panel of the control panel.
FIG. 7 is an explanatory view showing a state in which a cross-sectional area of an oil hole as a hole to be measured is measured.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Loading part 2 ... Measuring apparatus 3 ... Moving mechanism part 4 ... Control panel 5 ... Cylinder block (work)
8 ... Crank hole (third structure hole)
9a ... 1st balun smash hole (1st structure hole)
9b ... Second balun smash hole (second structural hole)
10, 10a, 10b ... oil hole (first hole to be measured)
11a, 11b ... Oblique hole (second hole to be measured)
DESCRIPTION OF SYMBOLS 12 ... 1st measurement bar 13 ... 2nd measurement bar 14 ... 3rd measurement bar 15 ... Light projection part 16 ... Light reception part 17a, 17b ... Other light projection part 18a, 18b ... Light reception part or interruption | blocking part 20 ... Stage 21 ... guide rail 22 ... drive motor 23 ... drive shaft 24 ... display panel

Claims (5)

Between the first, second and third structural holes formed substantially parallel to the central axis in the longitudinal direction of the block-shaped main body, and in the longitudinal direction of the first and second structural holes A first hole to be measured formed perpendicularly, and a second hole to be measured that is formed so as to intersect the first hole to be measured at an intermediate portion of the first hole to be measured. Positioning means for positioning a workpiece having a measurement position;
Three measurement bars inserted into the three structural holes of the workpiece positioned by the positioning means are provided, and the first and second measurement bars inserted into the first and second structural holes respectively have a first measurement bar. The third measurement bar inserted into the third structure hole is capable of advancing and retracting into the second measured hole. Measuring means having a light receiving part or a blocking part;
Moving means for advancing and retreating the three measuring bars of the measuring means toward the workpiece at the measuring position;
A control unit that controls the operation of each of the above-described components and displays a measurement result by inputting a measurement signal from the measurement unit;
A workpiece hole drilling state measuring device comprising: 2. The light projecting section and the light receiving section provided in the first and second measurement bars are for measuring a penetration state of a first hole to be measured drilled in a workpiece. The workpiece hole portion drilling state measuring device as described. 2. The light projecting portion and the light receiving portion provided in the first and second measurement bars are for measuring a cross-sectional area of a first hole to be measured drilled in a workpiece. The workpiece hole portion drilling state measuring device as described. 4. The work hole drilling state measurement according to claim 2, wherein the light projecting section and the light receiving section provided on the first and second measuring bars are measured using laser light. apparatus. The light receiving portion or the blocking portion provided in the third measurement bar cooperates with the light projecting portion and the light receiving portion provided in the first and second measurement bars, and the second light beam is formed in the work. 2. The workpiece hole drilling state measuring device according to claim 1, wherein the state of intersection between the hole to be measured and the first hole to be measured is measured.

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