Inspection apparatus and inspection method

Abstract

The positional accuracy of the workpiece is measured appropriately. A first machined hole extending axially and a second machined hole extending radially are provided inside the workpiece. The inspection device has a first insertion gauge inserted into the first machined hole and a second insertion gauge inserted into the second machined hole. The first insertion gauge has a through hole extending through the opening direction of the second machined hole. The through hole is positioned at the point where it overlaps with the second machined hole when the first insertion gauge is inserted into the first machined hole to a predetermined length, viewed radially from the central axis. The second insertion gauge has an insertion portion and a gauge portion whose outer diameter matches the inner diameter of the second machined hole. The gauge portion has an abutment portion that extends through the through hole and abuts against the inner circumference of the first machined hole. The through hole has a portion whose inner diameter matches the outer diameter of the abutment portion. A mark is provided on the outer circumference of the insertion portion to visually confirm the insertion length of the gauge portion into the second machined hole.

Description

Technical Field

[0001] This invention relates to an inspection device and an inspection method. Background Technology

[0002] Patent document 1 discloses an inspection device for inspecting the positional tolerance of holes formed on a workpiece.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-015615 Summary of the Invention

[0006] Patent document 1 discloses a technique that allows for easy inspection of the position of holes machined on a workpiece using an insertion gauge without the use of a three-dimensional measuring instrument.

[0007] The technical problem that the invention aims to solve

[0008] This technique is better suited for measuring positional accuracy of holes machined in the same direction at locations that protrude in a flange-like manner from the outer periphery of the object being inspected. For example, a transmission shaft may have an axially machined oil hole and an oil hole communicating radially with that oil hole. In the case of workpieces with intersecting oil holes, it can be difficult to properly measure the positional accuracy of the oil holes.

[0009] Therefore, it is required to be able to properly measure the position of the machined holes in a workpiece with intersecting oil holes (machined holes).

[0010] Technical solutions for solving technical problems

[0011] One aspect of the present invention is an inspection device for checking the positional accuracy of machined holes provided on a workpiece, characterized in that the workpiece is provided with:

[0012] A first machined hole extends inside the workpiece along its central axis in the length direction and opens at least one of one end and the other end in the length direction of the workpiece.

[0013] A second machining hole extends radially along the central axis inside the workpiece and communicates with the outer periphery of the workpiece;

[0014] The inspection device has:

[0015] A first insertion gauge is inserted into the first machined hole;

[0016] A second insertion gauge is inserted into the second machined hole;

[0017] The first insertion gauge has a through hole extending through the opening direction of the second machining hole. This through hole is positioned at the point where it overlaps with the second machining hole when the first insertion gauge is inserted into the first machining hole to a predetermined length, viewed radially from the central axis.

[0018] The second insertion gauge has:

[0019] The measuring section concentrically connects the insertion part and the abutment part in series. The outer diameter of the insertion part matches the inner diameter of the second machined hole. The abutment part has a smaller outer diameter than the insertion part and can pass through the through hole to abut against the inner circumference of the first machined hole.

[0020] The through hole is formed as a portion having an inner diameter that matches the outer diameter of the abutment portion.

[0021] The outer periphery of the insertion part is provided with a mark for visual confirmation of the insertion length of the gauge part into the second machining hole.

[0022] Invention Effects

[0023] According to one aspect of the present invention, the positional accuracy of machined holes can be appropriately measured. Attached Figure Description

[0024] Figure 1 This is a diagram illustrating the inspection process of the inspection device.

[0025] Figure 2 It is a diagram illustrating the workpiece.

[0026] Figure 3 It is a diagram illustrating the workpiece.

[0027] Figure 4 It is a diagram illustrating the workpiece.

[0028] Figure 5 This is a diagram illustrating the inspection device.

[0029] Figure 6 This is a diagram illustrating the inspection device.

[0030] Figure 7 This is a diagram illustrating the inspection device.

[0031] Figure 8 This is a diagram illustrating the inspection device.

[0032] Figure 9 This is a diagram illustrating the inspection device.

[0033] Figure 10 This is a diagram illustrating the inspection device.

[0034] Figure 11This is a diagram illustrating the inspection device.

[0035] Figure 12 This is a diagram illustrating the inspection device.

[0036] Figure 13 This is a diagram illustrating the inspection device.

[0037] Figure 14 This is a diagram illustrating the inspection device.

[0038] Figure 15 This is a diagram illustrating the inspection device.

[0039] Figure 16 This is a diagram illustrating the gauge holder and the first insertion gauge.

[0040] Figure 17 This is a diagram illustrating the gauge bracket.

[0041] Figure 18 This is a diagram illustrating the first insertion gauge.

[0042] Figure 19 This is a diagram illustrating the second insertion gauge.

[0043] Figure 20 This is a diagram illustrating the positional relationship between the through hole of the first insertion gauge in the first machined hole of the workpiece and the second machined hole.

[0044] Figure 21 This diagram illustrates the function of the second insertion gauge.

[0045] Figure 22 This diagram illustrates the function of the second insertion gauge.

[0046] Figure 23 This diagram illustrates the function of the second insertion gauge.

[0047] Figure 24 This diagram illustrates the function of the turntable. Detailed Implementation

[0048] Hereinafter, we will describe an example of an inspection device 1 used to inspect the positional accuracy (positional precision) of a machined hole provided on a workpiece 9, according to an embodiment of the present invention.

[0049] Figure 1 This is a diagram illustrating the inspection process of inspection device 1. In Figure 1 In (a), the inspection device 1 before the workpiece 9 is placed is schematically shown in cross-section along with the workpiece 9. Figure 1 In (b), the inspection device 1, on which the workpiece 9 is placed, is schematically shown in cross-section along with the workpiece 9. Figure 1In (c), a cross-section schematically shows the state in which the first insertion gauge 7 of the inspection device 1 is inserted into the first machined hole 91 of the workpiece 9. Figure 1 In (d), the state of the second insertion gauge 8 of the inspection device 1 being inserted into the second machining hole 92 of the workpiece 9 is schematically shown in cross section.

[0050] Figures 2-4 This is a diagram illustrating workpiece 9. In Figure 2 In the middle, it schematically indicates along Figure 1 (a) shows the section of workpiece 9 cut by line AA. Figure 3 In (a), it is schematically indicated that along Figure 1 (c) shows the section of workpiece 9 cut by line BB. Figure 3 In (b), it is schematically indicated that along Figure 1 (c) shows the CC line cutting the cross-section of workpiece 9. Figure 3 In (c), it is schematically indicated that along Figure 1 (d) The DD line cuts through the cross section of workpiece 9.

[0051] exist Figure 4 In (a), it is schematically indicated that along Figure 2 The ACB line in the diagram cuts through the cross-section of workpiece 9. Figure 4 In (b), it is schematically indicated that along Figure 2 The cross section of workpiece 9 is cut using the ACD line.

[0052] Furthermore, in the following description, when explaining the various components of the inspection device 1, Figure 1 In Chinese, symbols such as "X", "Y", "Z", top and bottom, front and back are sometimes used to indicate the positional relationship of the constituent elements.

[0053] The X direction corresponds to the width direction when observing the inspection device 1 from the front (front side). Figure 1 The inward and outward directions of the paper). The Y direction corresponds to the depth direction when viewing the inspection device 1 from the front (…). Figure 1 The left and right directions in the middle). The Z direction is equivalent to the vertical direction when the inspection device 1 is set on the setting surface Fr (in the left and right directions). Figure 1 (the vertical direction in the middle).

[0054] The upper side refers to Figure 1 The upper side of the Z-direction (vertical direction) and the lower side refer to... Figure 1 The lower side in the Z direction. The front side refers to... Figure 2 In the Y-direction (horizontal direction), one side refers to the rear side. Figure 2 On the other side of the Y direction.

[0055] like Figure 1As shown, the inspection device 1 is mounted on the setting surface Fr. In the inspection device 1, the workpiece 9 is placed from the front side of the inspection device 1, and the positional accuracy (positional precision) of the machined holes set on the workpiece 9 is inspected using the first insertion gauge 7 and the second insertion gauge 8.

[0056] like Figure 1 As shown in (a), the workpiece 9, the object of inspection by the inspection device 1, has a first machining hole 91 extending axially and a second machining hole 92 extending radially inside the cylindrical base 90 (see reference). Figure 1 (b)).

[0057] The inspection device 1 is used to check whether the first machined hole 91 and the second machined hole 92 machined on the workpiece 9 have been properly machined.

[0058] As an example of the object of inspection by inspection device 1, the shaft of a transmission is an example.

[0059] like Figure 4 As shown, when the workpiece 9 is the shaft of the transmission, the workpiece 9 is a rod-shaped component having a plurality of first machining holes 91 (91A, 91B, 91C) machined in the axial direction (direction of the central shaft C) and second machining holes 92 (92A, 92B, 92C, 92D) communicating with the first machining holes 91 (91A, 91B, 91C) in the radial direction (radial direction of the central shaft C).

[0060] It should be noted that in the following description, without the need to specifically distinguish between the first machined holes 91A, 91B, 91C and the second machined holes 92A, 92B, 92C, 92D, they may sometimes be simply referred to as the first machined hole 91 and the second machined hole 92.

[0061] exist Figure 2 In the workpiece 9 shown, there are three first machining holes 91 (91A, 91B, 91C) inside the cylindrical base 90.

[0062] In the base 90, the first machined holes 91 (91A, 91B, 91C) are arranged at 120° intervals in the circumferential direction around the central axis C of the base 90. The center C91 of each first machined hole 91 (91A, 91B, 91C) is located on an imaginary circle Im1 centered on the central axis C.

[0063] like Figure 4 As shown, the three first machined holes 91 (91A, 91B, 91C) are blind holes that open at one end 9a of the base 90. The lengths La, Lb, and Lc of the first machined holes 91 (91A, 91B, 91C) in the direction of the central axis C of the workpiece 9 are different (La > Lb > Lc).

[0064] A second machining hole 92 (92A, 92B, 92C) extending radially along the central axis C is connected to the front end 91a side of the first machining hole 91 (91A, 91B, 91C).

[0065] The second machining hole 92 (92A, 92B, 92C) is located at a position offset by a specified length Lz from the front end 91a of the first machining hole 91 (91A, 91B, 91C).

[0066] Looking at the second machining hole 92C, the second machining hole 92D is located at a position that is significantly separated from the base 90 at one end 9a (upper side in the figure).

[0067] like Figure 3 As shown in (a), the second machining hole 92A is provided with an orientation along the diameter line L90A of the base 90. The second machining hole 92A connects the outer periphery of the workpiece 9 (base 90) with the first machining hole 91A.

[0068] like Figure 3 As shown in (b) and (c), the other second machining holes 92B and 92C are also arranged with their orientation along the diameter lines L90B and L90C. The second machining holes 92B and 92C also enable the outer periphery of the workpiece 9 (base 90) to communicate with the first machining holes 91B and 91C.

[0069] The second machining holes 92 (92A, 92B, 92C) open in different directions around the central axis C of the workpiece 9.

[0070] like Figure 4 As shown, at the base 90, the second machining holes 92 (92A, 92B, 92C) are set at different positions along the axial direction of the central shaft C.

[0071] In addition, the second machining hole 92D opens in the same direction as the second machining hole 92C.

[0072] A large-diameter portion 96, with an outer diameter larger than that of the base 90, is provided at the other end 9b of the base 90. The large-diameter portion 96 is provided throughout the entire circumference of the central axis C. Teeth (not shown) are provided on the outer periphery of the large-diameter portion 96.

[0073] Viewed from the large diameter portion 96, a concave abutment groove 95 is provided on one end 9a side (upper side in the figure). The abutment groove 95 is provided all around the entire circumference of the central axis C.

[0074] Figures 5 to 7 This is a diagram illustrating the inspection device 1. In Figure 5 The image schematically illustrates the state of the inspection device 1 as viewed from the front. Figure 6 In the diagram, it is schematically shown that the inspection device 1 is moved along... Figure 5 The cross-section cut by line AA. Figure 7 In the diagram, the inspection device 1 is schematically shown along... Figure 6 The cross section cut by line AA in the diagram.

[0075] In the inspection device 1, the following steps are performed sequentially: (a) In the inspection device 1, a preparation step is performed to support the workpiece 9 in the Z direction (refer to...). Figure 1 (b)); (b) The first insertion process of inserting the first insertion gauge 7 into the first machining hole 91 of the workpiece 9 from the Z direction (refer to Figure 1 (c)); (c) The second insertion process of inserting the second insertion gauge 8 radially into the second machining hole 92 of the workpiece 9 (refer to) Figure 1 (d)).

[0076] Then, during the second insertion process, by confirming which of the multiple marks MK1 to Mk3 on the second insertion gauge 8 is located outside the workpiece 9 (confirmation process), it is confirmed whether the two intersecting machining holes (first machining hole 91 and second machining hole 92) have been properly machined.

[0077] The structure of the inspection device 1 will be described in detail below.

[0078] like Figure 5 As shown, the inspection device 1 has a base portion 20 mounted on the mounting surface Fr. (As indicated...) Figure 7 As shown, viewed from the Z direction, the base portion 20 is roughly rectangular in shape. A turntable 21 is provided in the center of the base portion 20.

[0079] like Figure 6 As shown, the turntable 21 has a fixed part 211 fixed to the base part 20, a movable part 212 rotatably supported on the fixed part 211, and a mounting part 213 fixed to the upper part of the movable part 212. The mounting part 213, the movable part 212, and the fixed part 211 are concentrically arranged on the central axis Z1. The central axis Z1 is a reference axis extending in the Z direction through the rotation axis of the movable part 212 and the mounting part 213. The mounting part 213 and the movable part 212 can rotate about the central axis Z1.

[0080] like Figure 7 As shown, viewed from above, the mounting portion 213 is circular. On the outer periphery 213a of the mounting portion 213, handles 214 for holding are provided at 90° intervals in the circumferential direction around the central axis Z1 of the mounting portion 213.

[0081] In the mounting section 213, a support column 3 is provided at a position intersecting the central axis Z1. The support column 3 extends linearly along the central axis Z1 in the Z direction. The support column 3 is configured such that the central axis Z1 is not located in the thickness direction ( Figure 7 It is located in the center of the left and right directions, and at position 3c, which is closer to the thickness direction (Y direction).

[0082] At the base 30 of the support column 3, a groove 301 is provided on one side 3c in the thickness direction. A guide rail 31 is inserted and fixed in the groove 301 from the Y direction.

[0083] like Figure 6 As shown, in the support column 3, an intermediate support 33 is provided at a position approximately in the middle of the Z direction. A groove 301 is provided in the range from the upper end 3a of the support column 3 to the intermediate support 33.

[0084] like Figure 7 As shown, in the slider 4, a connecting arm 401, 401 is provided at the base end 40b on one side of the plate-shaped base 40 in the Y direction (right side in the figure) to connect with the guide rail 31. The slider 4 is configured to move in the Z direction by engaging the connecting arms 401, 401 on both sides of the guide rail 31 in the X direction, while restricting its detachment from the guide rail 31.

[0085] At the base 40 of the slider 4, a support hole 410 for the gauge bracket 6 (described later) is provided at a position away from the base end 40b towards the front end 40a (left side in the figure). The support hole 410 penetrates the base 40 in the thickness direction (Z direction) (see reference). Figure 8 ).

[0086] Figures 8 to 10 This is a diagram illustrating the inspection device 1. In Figure 8 In the middle, Figure 6 The region on the upper end 3a side of the support 3 is enlarged and schematically shown. Figure 9 In the middle, Figure 5 The region on the upper end 3a side of the support 3 is enlarged and schematically shown. Figure 10 In the middle, it is indicated schematically. Figure 6 The cross section along line AA.

[0087] like Figure 8 and Figure 9 As shown, a pulley bracket 32 ​​is fixed at the upper end 3a of the support column 3.

[0088] like Figure 9 As shown, the pulley bracket 32 ​​has a base 321 fixed to the upper end 3a of the support column 3, and a support portion 322 extending upward from approximately the center of the base 321 in the width direction (X direction).

[0089] Viewed from the Y direction, the base 321 is a plate-shaped portion orthogonal to the central axis Z1. Viewed from the Y direction, the support portion 322 extends from the central axis Z1 towards the X direction (…). Figure 9 The offset position (in the left direction) extends upward along the central axis Z1. On the central axis Z1 side of the support 322 ( Figure 9A pulley 323 is located on the right side of the axis. Viewed from the X direction, pulley 323 is positioned at an intersection with the central axis Z1.

[0090] like Figure 8 As shown, viewed from the X direction, a pair of pulleys 323, 323 are provided in the support portion 322. In the support portion 322, the pair of pulleys 323, 323 are spaced apart in the Y direction. Viewed from the X direction, pulleys 323, 323 are located on one side (left side) and the other side (right side) of the support column 3 in the Y direction, respectively. Viewed from the X direction, pulleys 323, 323 are aligned in the Z direction. Pulleys 323 are rotatable about rotation axes Y323, Y323 along the Y direction.

[0091] Viewed from the X direction, one end 321a of the base 321 is positioned across the lower part of the front pulley 323 in the Y direction (left direction in the figure). The other end 321b of the base 321 is coplanar with the rear surface 3d of the support column 3.

[0092] A wire guide 324 is provided at one end 321a of the base 321. A wire insertion hole 324a is provided in the wire guide 324, extending through in the Z direction. A insertion hole 321c is provided in the base 321 at a position corresponding to the insertion hole 324a, extending through in the Z direction.

[0093] One end of the wire W passes through the insertion holes 324a and 321c in the Z direction. One end of the wire W is secured to the upper surface of the slider 4 below the base 321. The area where the wire W extends upward from the wire guide 324 is wound around a pair of pulleys 323 and 323. The other end of the wire W extends downward along the support 3 in the Z direction and is secured to the counterweight Wt (see reference). Figure 6 )superior.

[0094] The slider 4 and the counterweight Wt are connected by a steel wire W wound on pulleys 323. The slider 4 and the counterweight Wt can be displaced relative to each other in the Z direction.

[0095] On support 3, when slider 4, located at the front in the Y direction, moves upward in the Z direction, counterweight Wt, located at the rear, moves downward in the Z direction. When slider 4 moves downward in the Z direction, counterweight Wt moves upward in the Z direction.

[0096] like Figure 5 As shown, in the support column 3, a pair of ball-head plungers 10 are provided at the upper and lower parts of the area where the guide rail 31 is located. The ball-head plungers 10 are provided for positioning the slider 4 that moves along the guide rail 31 in the Z direction.

[0097] like Figure 7 As shown, a bracket 35, 35 is provided on the upper part of the support column 3 to support the ball head plunger 10.

[0098] Brackets 35 and 35 are fixed to both sides of the support column 3 (base 30) in the X direction by bolts not shown.

[0099] The bracket 35 has a fixing part 351 fixed to the side of the support column 3 (base 30) and an extension part 352 extending from the fixing part in the Y direction. Viewed from the Z direction, the extension parts 352 extend away from the base 30 (left direction in the figure) on both sides of the area where the slider 4 (base 40) supported by the guide rail 31 is located.

[0100] The front ends 35a and 35a of the extensions 352 and 352 extend to the side of the area where the support hole 410 is provided on the slider 4. The extensions 352 and 352 are arranged symmetrically across the area where the slider 4 (base 40) is located. Through holes 353 and 353 extending in the X direction are provided on the front end 35a side of the extension 352. The ball plunger 10 is screwed into the through holes 353 and 353 from the outside in the X direction. When the slider 4 reaches the same height position as the brackets 35 and 35 in the Z direction, the ball head Ba of the ball plunger 10 elastically engages with the grooves 402a provided on both sides of the slider 4.

[0101] When the slider 4 engages with the ball head Ba of the ball head plunger 10 in the grooves 402a provided on both sides in the X direction, it achieves positioning in the Z direction.

[0102] like Figure 10 As shown, brackets 36 and 36 are also fixed to both sides of the support column 3 (base 30) in the X direction by bolts not shown.

[0103] The bracket 36 has a fixing part 361 fixed to the side of the base 30 and an extension part 362 extending from the fixing part in the Y direction. Viewed in the Z direction, the extension parts 362 and 362 extend away from the base 30 on both sides of the slider 4 (base 40) supported by the guide rail 31. Through holes 363 and 363 extending in the X direction are provided on the front end 362a side of the extension part 362. Ball plungers 10 are screwed into the through holes 363 and 363 from the outside in the X direction. When the slider 4 reaches the same height as the bracket 36 and 36 in the Z direction, the ball head Ba of the ball plunger 10 elastically engages with the grooves 402a provided on both sides of the slider 4. In this embodiment, when the first insertion gauge 7 (described later) is inserted into the first machining hole 91 on the side of the workpiece 9 with a specified length, the ball head Ba of the ball plunger 10 engages in the groove 402a on the side of the slider 4, positioning the slider 4 (first insertion gauge 7) at a specified position for checking the position accuracy.

[0104] like Figure 5As shown, connecting cylinders 49, 49 are provided on one side of the slider 4 in the X direction (right side in the figure). The connecting cylinders 49, 49 are arranged vertically in the Z direction. The support frame 391 of the operating handle 39 is fixed to the front end of the connecting cylinders 49, 49 by bolts B, B. The support frame 391 is arranged along the central axis Z1. The support frame 391 extends downward along the central axis Z1 towards the base portion 20.

[0105] The operating handle 39 is fixed to the area at the lower end of the support frame 391. The operating handle 39 extends away from the support column 3 in the X direction.

[0106] In the inspection device 1, the operator holding the operating handle 39 moves the operating handle 39 in the Z direction, thereby causing the slider 4 to move along the guide rail 31 in the Z direction.

[0107] Figures 11 to 13 This is a diagram illustrating the inspection device 1. In Figure 11 In the middle, Figure 6 The area around the intermediate support 33 is enlarged and schematically shown. Figure 12 In the middle, it is indicated schematically. Figure 11 The cross-section along line AA. Figure 13 In the middle, it is indicated schematically. Figure 11 The cross section along line BB.

[0108] like Figure 11 As shown, the intermediate support 33 is a plate-shaped component orthogonally positioned relative to the support column 3. The base end 33b of the intermediate support 33 is embedded in a recessed fitting portion 305 provided on the front side 3c of the support column 3. The intermediate support 33 extends linearly along the Y direction in a direction away from the support column 3.

[0109] A support hole 330 for the workpiece support 34 is provided on the front end 33a side of the intermediate support 33. The support hole 330 is in the thickness direction ( Figure 11 The base 331 of the intermediate support 33 (in the vertical direction) extends through the support hole 330. The support hole 330 is formed by connecting a small-diameter portion 330a and a large-diameter portion 330b with an inner diameter larger than that of the small-diameter portion 330a in series. In the Z-direction, the small-diameter portion 330a is located below the large-diameter portion 330b. The small-diameter portion 330a and the large-diameter portion 330b are concentrically arranged.

[0110] The shaft portion 341 of the workpiece support 34 is inserted into the support hole 330 from below. A disc-shaped stop 343 is fixed to the upper end of the shaft portion 341. A fitting portion 342 with a diameter larger than the shaft portion 341 is provided at the lower part of the shaft portion 341. A concave fitting recess 342b is formed at the lower end 342a of the fitting portion 342. One end 9a (upper end) of the workpiece 9 is fitted and supported in the fitting recess 342b from the Z direction.

[0111] A spring Sp is inserted externally into the shaft portion 341. One end of the spring Sp abuts against the fitting portion 342 in the Z direction. The other end of the spring Sp abuts against the periphery of the support hole 330 on the intermediate bracket 33. The workpiece bracket 34 is subjected to a downward force under the action of the spring Sp. In this state, the stop 343 of the workpiece bracket 34 is locked at the boundary between the small diameter portion 330a and the large diameter portion 330b of the support hole 330, preventing the workpiece bracket 34 from falling out of the support hole 330.

[0112] The workpiece support 34 is capable of elastic displacement in the Z direction, and holds one end 9a of the workpiece 9 while applying a downward force to the workpiece 9.

[0113] like Figure 13 As shown, viewed from the Z direction, the workpiece support 34 has insertion holes 345, 345, 345 for the first insertion gauges 7 at a position overlapping with the first machining hole 91 of the workpiece 9. In this embodiment, in the inspection device 1, when the slider 4 is positioned by the upper ball plunger 10, 10, at least two of the first insertion gauges 7 (7A, 7B, 7C) 7A and 7B are held in a position where the front end side of the gauge hole 71 is inserted into the insertion holes 345, 345.

[0114] like Figure 12 As shown, the width W33a of the front end 33a in the X direction of the intermediate support 33 is narrower than the width W331 of the base 331 in the X direction. Between the front end 33a and the base 331, there is a width-reducing portion 332 that narrows in the X direction as it moves away from the front end towards the base 331.

[0115] The side surface 332a of the narrowed portion 332 becomes an inclined surface that is inclined relative to the center line C33 of the base 331. Guide members 51, 51 with grooves 510 are fixed on the side surfaces 332a, 332a.

[0116] like Figure 5 As shown, the guide components 51, 51 are arranged in an orientation along the central axis Z1. Figure 9 As shown, the upper ends 51a and 51a sides of the guide members 51 are fixed to the base 40 of the slider 4. In the guide member 51, the groove 510 extends upward along the Z direction toward the slider 4 side.

[0117] like Figure 13 As shown, a shaft N1 with a screw N through a groove 510 that passes through the guide members 51, 51 is screwed into the fitting portion 342 of the workpiece support 34.

[0118] As described above, the workpiece support 34 is supported by an intermediate support 33 fixed to the support column 3 (see reference). Figure 11Therefore, when the slider 4, to which the guide members 51, 51 are fixed, moves along the guide rail 31 in the Z direction, the screws N, N, screwed into the fitting part 342 move within the grooves 510, 510 of the guide members 51, 51. Thus, the movement of the guide members 51, 51 in the Z direction as the slider 4 moves is guided by the screws N, which pass through the grooves 510 of the guide members 51.

[0119] like Figure 5 As shown, a limiting part 37 and a locking part 38 for workpiece 9 are provided on the lower side of the intermediate support 33 to restrict the rotation of workpiece 9.

[0120] Figure 14 and Figure 15 This is a diagram illustrating the inspection device 1. In Figure 14 The diagram schematically illustrates the area of ​​the inspection device 1 with the limiting part 37 along... Figure 6 The cross-section cut along line BB. Figure 15 In the diagram, it is schematically shown that the area of ​​the inspection device 1 with the locking part 38 is along... Figure 6 The cross section cut by the CC line.

[0121] like Figure 14 As shown, the limiting part 37 has a fixing part 371 that is fixed to the base 30 of the support column 3. The fixing part 371 is fixed to the base 30 by a bolt B that passes through the fixing part 371 in the Y direction.

[0122] A leg 372 is provided adjacent to the fixing part 371 in the X direction, extending in a direction orthogonal to the surface 3c on one side (left side in the figure) of the base 30. The leg 372 bends toward the bolt B side (upper in the figure) away from the base 30. The area in the leg 372 forward of the bend 372a becomes a support part 373 for a positioning screw 375. A threaded hole 373a is provided through the support part 373 in the thickness direction. The screw 375 is screwed into the threaded hole 373a from the bolt B side (upper in the figure). The front end 376 of the screw 375 protrudes forward of the threaded hole 373a.

[0123] When workpiece 9 is placed on inspection device 1, the front end 376 of screw 375 is radially pressed into the abutment groove 95 of workpiece 9 from the central axis C, restricting the rotation of workpiece 9 about the central axis C. For example, in Figure 14 In one case, the front end 376 of the screw 375 is pressed into the abutment groove 95 provided on the outer periphery of the workpiece 9. However, the front end 376 of the screw 375 can also be inserted into the second machining hole 92D of the outer periphery opening of the workpiece 9 to restrict the rotation of the workpiece 9 about the central axis C.

[0124] like Figure 15As shown, the locking part 38 has a fixing part 381 that is fixed to the base 30 of the support column 3. The base 30 is provided with a fitting groove 306 for the fixing part 381. When the fixing part 381 is fitted into the fitting groove 306 in the Y direction, it is fixed to the base 30 by a bolt B that passes through the base 30.

[0125] The base 30 is fixed on both sides in the X direction by bolts B. A support portion 382 is provided between bolts B and B in the base 30, extending in a direction orthogonal to one side 3c of the base 30.

[0126] The support portion 382 has a width W38 in the X direction. The front end 38a of the support portion 382 is located in front of the central axis C in the Y direction. A recess 383 is provided on the front end 38a side of the support portion 382, ​​recessed towards the fixing portion 381. The recess 383 has a width in the X direction that matches the outer diameter D90 of the base 90 of the workpiece 9. The recess 383 extends towards the fixing portion 381 (right side in the figure) along the center line C38 of the support portion 382. The region 383a of the recess 383 that is closer to the fixing portion 831 than the central axis C (right side in the figure) has an arc shape along the outer periphery of the base 90 of the workpiece 9.

[0127] In the support portion 382, ​​the recess 383 on both sides in the X direction becomes the locking portions 384, 384 for locking the large diameter portion 96 of the workpiece 9.

[0128] When placing the workpiece 9 onto the inspection device 1, the workpiece 9 is supported on the support column 3 by the following steps.

[0129] (a) After engaging one end 9a of the base 90 of the workpiece 9 with the engagement portion 342 of the workpiece support 34 from the lower side in the Z direction, lift the workpiece 9 and compress the spring Sp in the direction of the central axis C (refer to...). Figure 11 (b) Insert the area of ​​the base 90 of the workpiece 9 that is lower than the large diameter portion 96 (the other end 9b side) into the recess 383 of the locking portion 38 from the Y direction (refer to...). Figure 15 (c) By means of the elastic force of the spring Sp, the large diameter portion 96 of the workpiece 9 is pressed against the periphery of the recess 383 in the locking portion 38 (see reference). Figure 15 (d) Screw 375 of the limiting part 37 into the support part 373, so that the front end 376 of the screw 375 is pressed radially from the central axis C into the abutment groove 95 of the workpiece 9 (refer to...). Figure 14 ).

[0130] Thus, the workpiece 9 is supported by the inspection device 1 in a state where the large diameter portion 96 is pressed against the locking portion 38 by the force of the spring Sp acting via the workpiece support 34.

[0131] In this state, workpiece 9 is positioned with its central axis C aligned with the central axis Z1 of inspection device 1 (see reference). Figure 1 (b)).

[0132] Furthermore, the rotation of workpiece 9 about the central axis C is restricted by the front end 376 of screw 375 pressed against the abutment groove 95 (see reference). Figure 14 Alternatively, the front end 376 of the screw 375 can be inserted into the second machined hole 92D in the outer peripheral opening of the workpiece 9 to restrict the rotation of the workpiece 9 around the central axis C.

[0133] Figure 16 This is a diagram illustrating the gauge holder 6 and the first insertion gauge 7 (7A, 7B, 7C). Figure 17 This is a diagram illustrating gauge bracket 6. Figure 17 In the middle, it schematically indicates along Figure 16 The cross section of gauge bracket 6 is cut along the AA line. Figure 18 This is a diagram illustrating the first insertion gauge. In Figure 18 In (a), it is schematically indicated that along Figure 16 The BB line in the diagram cuts through the cross section of the first insertion gauge 7. Figure 18 In (b), it is schematically indicated that along Figure 16 The CC line in the diagram cuts through the cross section of the first insertion gauge 7.

[0134] In the inspection device 1, when inspecting the positional accuracy (machining accuracy) of the machined holes (first machined hole 91, second machined hole 92) of the workpiece 9, the first insertion gauge 7 (7A, 7B, 7C) is inserted from the Z direction into the first machined hole 91 (91A, 91B, 91C) of the workpiece 9 supported by the support column 3.

[0135] like Figure 16 As shown, the first insertion gauges 7 (7A, 7B, 7C) are supported by sliders 4 via a common gauge bracket 6. Slider 4 is movable in the Z-direction via the aforementioned guide rail 31 (see reference). Figure 1 (a), (b), (c)).

[0136] The gauge bracket 6 has a gauge support portion 61 with a cylindrical shaft portion 611 and a plate portion 62 that is fixed to one end 611a of the shaft portion 611 by bolts V.

[0137] The gauge bracket 6 has a flange portion 612 with a larger diameter than the shaft portion 611 at the end opposite to one end 611a. Viewed in the Z direction, the flange portion 612 is formed with an outer diameter larger than the outer diameter D611 of the shaft portion 611. The plate portion 62 is a disc-shaped component with an outer diameter that matches the flange portion 612.

[0138] like Figure 8As shown, bearings B are provided between the plate portion 62 of the gauge bracket 6 and the base portion 40 of the slider 4, and between the flange portion 612 of the gauge bracket 6 and the base portion 40 of the slider 4. The gauge bracket 6 is rotatably mounted relative to the slider 4 when it is restricted by the plate portion 62 after detaching from the slider 4.

[0139] like Figure 17 As shown, the gauge support part 61 has an insertion hole 63 (63A, 63B, 63C) for the first insertion gauge 7 (7A, 7B, 7C).

[0140] Insertion holes 63 (63A, 63B, 63C) are provided at 120° intervals in the circumferential direction around the central axis C of the gauge support portion 61. Insertion holes 63 (63A, 63B, 63C) are located at the lower end 612b of the flange portion 612 (see reference). Figure 16 It has an opening and extends linearly along the central axis C inside the shaft portion 611. Figure 16 As shown, the insertion holes 63 (63A, 63B, 63C) each have a length L63 in the Z direction.

[0141] like Figure 17 As shown, the flange portion 612 is provided with connecting holes 613a, 613b, and 613c, which communicate with the insertion holes 63 (63A, 63B, 63C) radially from the central axis C. Figure 17 As shown, the connecting holes 613a, 613b, and 613c extend linearly in the radial direction of the central axis C. The connecting holes 613a, 613b, and 613c connect the insertion holes 63 (63A, 63B, and 63C) and the outer periphery 612a of the flange portion 612.

[0142] A first insertion gauge 7 (7A, 7B, 7C) is inserted into each of the insertion holes 63 (63A, 63B, 63C).

[0143] like Figure 16 As shown, the first insertion gauge 7 (7A, 7B, 7C) has a cylindrical base 70.

[0144] A through hole 72 extending through the base 70 in the thickness direction is provided on the base end side of the base 70. For example... Figure 17 and Figure 18 As shown, the region in the base 70 with the through hole 72 has a width W72 that is smaller than the inner diameter D613 of the connecting hole 613.

[0145] A locating pin 65 is inserted into the insertion holes 63 (63A, 63B, 63C). The locating pin 65 has a head 650 and a shaft portion 651 extending from the head 650. The shaft portion 651 has a major diameter portion 652 and a minor diameter portion 653. The major diameter portion 652 has an outer diameter that matches the inner diameter D613 of the aforementioned connecting hole 613. The minor diameter portion 653 has an outer diameter that matches the width W72 of the aforementioned through hole 72. The major diameter portion 652 and the minor diameter portion 653 are coaxially arranged.

[0146] When the locating pin 65 is radially inserted into the connecting hole 613 from the central shaft C, the small diameter portion 653 engages in the through hole 72 on the side of the first insertion gauge 7. Thus, the first insertion gauges 7 (7A, 7B, 7C) are supported by the gauge bracket 6 in a state where they are detached from the gauge bracket 6 and their rotation is restricted.

[0147] In addition, since the first insertion gauge 7 (7A, 7B, 7C) can be easily installed and removed from the gauge bracket 6, when the first insertion gauge 7 (7A, 7B, 7C) is worn or damaged, it can be replaced with a first insertion gauge 7 of different lengths.

[0148] like Figure 16 As shown, the first insertion gauges 7 (7A, 7B, 7C) have different lengths L7A, L7B, and L7C. A gauge hole 71 is provided on the front end side of the base 70. The gauge hole 71 penetrates the base 70 in an orthogonal direction. The gauge hole 71 is an elongated hole with a length L71 in the length direction of the base 70 (see reference). Figure 18 ).

[0149] The first insertion gauges 7 (7A, 7B, 7C) are supported by a common gauge bracket 6. Furthermore, the gauge bracket 6 moves integrally with the slider 4 along the guide rail 31 in the Z direction.

[0150] Therefore, when the slider 4 is moved downward in the Z direction, the first insertion gauges 7 (7A, 7B, 7C) supported by the gauge bracket 6 are respectively inserted into the first machining holes 91 (91A, 91B, 91C) of the workpiece 9 to be inspected.

[0151] When the first insertion gauge 7 (7A, 7B, 7C) is inserted into the first machining hole 91 (91A, 91B, 91C) of the workpiece 9, the gauge holes 71 of the first insertion gauge 7 (7A, 7B, 7C) are respectively positioned opposite to the corresponding second machining holes 92 (92A, 92B, 92C) (see reference). Figure 3 ).

[0152] Figure 19 This is a diagram illustrating the second insertion gauge 8.

[0153] Figure 20This diagram illustrates the positional relationship between the gauge hole 71 of the first insertion gauge 7 in the first machined hole 91 of the workpiece 9 and the second machined hole 92. Figure 20 In (a), it is schematically indicated that along Figure 1 The EE line in the section cuts through the cross-section of the workpiece 9, which has the first insertion gauge 7 inserted. Additionally, in Figure 20 In (a), the position of the second machined hole 92 when viewed from the opening direction of the second machined hole 92 is indicated by an imaginary line. Figure 20 (b) schematically indicates along Figure 20 The cross section of line AA in (a). Figure 20 (c) schematically indicates along Figure 20 (b) Cross section of line BB.

[0154] Figures 21 to 23 This diagram illustrates the function of the second insertion gauge 8. Figures 21 to 23 (b) schematically represents the cross section along line AA in (a).

[0155] like Figure 19 As shown, the second insertion gauge 8 has a gauge section 82 at the front end of the rod-shaped holding section 81.

[0156] The gauge section 82 has a connecting section 83 that connects to the holding section 81, an insertion section 84 whose outer diameter matches the inner diameter of the second machining hole 92, and an abutting section 85 with an outer diameter smaller than that of the insertion section 84.

[0157] The connecting part 83, the insertion part 84, and the abutting part 85 are cylindrical. The connecting part 83, the insertion part 84, and the abutting part 85 are arranged in series on the central axis C81 of the holding part 81. The connecting part 83, the insertion part 84, the abutting part 85, and the holding part 81 are concentrically arranged.

[0158] The abutment portion 85 has a width W71 that corresponds to the gauge hole 71 of the first insertion gauge 7 (see reference). Figure 18 The outer diameter D85 matches the abutment portion 85. A strengthening treatment, such as quenching, is performed on the area on the front end 85a side of the abutment portion 85 (see [reference]). Figure 20 (c) Since the abutment portion 85 of the second insertion gauge 8 collides with the inner circumference of the first machining hole 91 during each positional check, a strengthening treatment is implemented to prevent wear on the abutment portion 85.

[0159] When measuring the machining accuracy (positional accuracy) of the first machining hole 91 and the second machining hole 92, the second insertion gauge 8 is inserted into the second machining hole 92 from the opening direction of the second machining hole 92.

[0160] When the first insertion gauge 7 is inserted into the first machining hole 91, the gauge hole 71 of the first insertion gauge 7 is positioned opposite to the second machining hole 92 (see reference). Figure 20 (a), (b)). In this state, the gauge hole 71 of the first insertion gauge 7 is positioned facing the opening direction of the second machining hole 92 (see reference). Figure 20 (c)).

[0161] Here, as Figure 20 As shown in (c), the gauge hole 71 is in a direction orthogonal to the central axis C ( Figure 20 The width W71 in the vertical direction of (c) is set to match the outer diameter D85 of the abutment portion 85 on the side of the second insertion gauge 8.

[0162] Therefore, when the second insertion gauge 8 is inserted into the second machining hole 92, and the first machining hole 91 and the second machining hole 92 are formed with good machining accuracy, the abutment portion 85 of the first insertion gauge 7 passes through the gauge hole 71 of the first insertion gauge 7 and abuts against the inner circumference of the first machining hole 91 (see reference). Figure 21 ).

[0163] Specifically, when viewed from the opening direction of the second machining hole 92, the first machining hole 91 and the second machining hole 92 are appropriately arranged in an overlapping position (refer to...). Figure 21 (a) The abutting part 85 of the second insertion gauge 8 enters the gauge hole 71 of the first insertion gauge 7 and abuts against the inner circumference of the first machining hole 91 (see reference). Figure 21 (b)).

[0164] On the other hand, looking from the opening direction of the second machining hole 92, if the first machining hole 91 and the second machining hole 92 are formed by offset in position in a direction orthogonal to the forming direction of the first machining hole 91 (left-right direction in the figure) (refer to...) Figure 22 (a) The abutment portion 85 of the second insertion gauge 8 and the gauge hole 71 of the first insertion gauge 7 are not coaxially arranged on the central axis C81 of the second insertion gauge 8.

[0165] Therefore, as abutting portion 85 of the second insertion gauge 8 abuts against the periphery of gauge hole 71 of the first insertion gauge 7, the insertion length of the insertion portion 84 into the second machining hole 92 becomes shorter. Figure 22 (b)).

[0166] Furthermore, when the predetermined first machining hole 91, which is formed parallel to the central axis C, is formed at an inclination relative to the central axis C, viewed from the opening direction of the second machining hole 92, even if the first machining hole 91 and the second machining hole 92 are appropriately arranged in an overlapping position (see reference...). Figure 23(a) The distance from the outer periphery of the base 90 to the first machined hole 91 will also differ from the predetermined distance (see reference). Figure 23 (b)).

[0167] For example, when the first machined hole 91 is offset towards the central axis C (left side in the figure), the insertion length of the insertion part 84 into the second machined hole 92 becomes longer (see reference). Figure 23 (b)).

[0168] Furthermore, when the first machining hole 91 shifts to a position away from the central axis C (right side in the figure), the insertion length of the insertion part 84 into the second machining hole 92 becomes shorter.

[0169] In the second insertion gauge 8 of this embodiment, a plurality of marks MK1 to MK3 are provided on the outer periphery of the insertion portion 84. The plurality of marks MK1 to MK3 are spaced apart in the direction of the central axis C81 of the second insertion gauge 8. The marks MK1 to MK3 are strip-shaped marks with a predetermined length in the circumferential direction of the insertion portion 84 and the insertion direction of the second insertion gauge 8.

[0170] The positions of the marks MK1 to MK3 on the insertion part 84 are set in a manner that satisfies the following conditions.

[0171] (a) When the first machining hole 91 and the second machining hole 92 are formed in a predetermined manner, when the abutting part 85 of the second insertion gauge 8 abuts against the inner periphery of the first machining hole 91, a mark MK3 is provided in the area of ​​the insertion part 84 located outside the second machining hole 92.

[0172] (b) When the first machining hole 91 and the second machining hole 92 are formed in a predetermined manner, when the abutting part 85 of the second insertion gauge 8 abuts against the inner periphery of the first machining hole 91, markings MK1 and MK2 are provided in the area located inside the second machining hole 92.

[0173] (c) When the first machining hole 91 and the second machining hole 92 are formed by offset in the radial position of the central axis, when the abutting part 85 of the second insertion gauge 8 interferes with the periphery of the gauge hole 71 of the first insertion gauge 7, marks MK2 and MK3 are provided in the area outside the second machining hole 92.

[0174] (d) When the first machining hole 91 is formed at an inclination relative to the central axis and the first machining hole 91 is offset to the side of the central axis C, when the abutting part 85 of the second insertion gauge 8 abuts against the inner circumference of the first machining hole 91, markings MK1, MK2, and MK3 are provided in the area located inside the second machining hole 92.

[0175] (e) When the first machining hole 91 is formed at an inclination relative to the central axis and the first machining hole 91 is offset to the side away from the central axis C, when the abutting part 85 of the second insertion gauge 8 abuts against the inner periphery of the first machining hole 91, markings MK1, MK2, and MK3 are provided in the area outside the second machining hole 92.

[0176] In this embodiment, markings MK1, MK2, and MK3 are sequentially provided from the abutment portion 85 side of the insertion portion 84.

[0177] like Figure 21 As shown in (a), for example, when viewed from the opening direction of the second machining hole 92, with the first machining hole 91 and the second machining hole 92 appropriately arranged in an overlapping position, the abutting portion 85 of the second insertion gauge 8 passes through the gauge hole 71 and abuts against the inner circumference of the first machining hole 91. In this state, the insertion portion 84 can visually confirm the mark MK3, which is furthest from the abutting portion 85 among the marks provided on the outer circumference.

[0178] On the other hand, such as Figure 22 As shown in (a), for example, when the first machining hole 91 and the second machining hole 92 are offset in position when viewed from the opening direction of the second machining hole 92, the abutment portion 85 of the second insertion gauge 8 interferes with the first insertion gauge 7. In this state, the insertion portion 84 can only visually confirm the mark MK2 at the exact center position and the mark MK3 furthest from the abutment portion 85 in the direction of the central axis C81 of the second insertion gauge 8 among the marks provided on the outer periphery.

[0179] In addition, such as Figure 23 As shown in (a) and (b), for example, when the first machining hole 91 is formed at an angle relative to the central axis and the first machining hole 91 is offset to the side closer to the central axis C, when the abutment portion 85 of the second insertion gauge 8 passes through the gauge hole 71 and abuts against the inner circumference of the first machining hole 91, the mark MK3, which is furthest from the abutment portion 85, cannot be visually identified like the other marks MK1 and MK2.

[0180] Furthermore, in this situation, when the first machining hole 91 is offset to the side away from the central axis C, at the moment when the abutment portion 85 of the second insertion gauge 8 passes through the gauge hole 71 and abuts against the inner circumference of the first machining hole 91, the mark MK1 closest to the abutment portion 85 cannot be visually confirmed as well as the other marks MK2 and MK3.

[0181] Therefore, a first insertion process was performed on the first machined hole 91 of workpiece 9, in which the first insertion gauge 7 was inserted from the Y direction (see reference). Figure 1 (c) After that, a second insertion process is performed on the second machined hole 92 of workpiece 9, in which the second insertion gauge 8 is inserted radially (refer to...). Figure 1(d) In this case, by confirming which of the multiple marks MK1 to MK3 set on the second insertion gauge 8 is located outside the workpiece 9, it is confirmed whether the two intersecting machining holes (first machining hole 91 and second machining hole 92) are properly machined.

[0182] In addition, the confirmation of the MK mark can be done visually by the operator or by processing images captured by a camera or other means using software.

[0183] Figure 24 This diagram illustrates the function of turntable 21. Figure 24 The diagram illustrates the positional relationship between workpiece 9 and turntable 21.

[0184] As mentioned earlier, the workpiece 9 has three first machining holes 91A, 91B, and 91C. Each of the first machining holes 91A, 91B, and 91C is connected to a second machining hole 92A, 92B, and 92C respectively.

[0185] First, with the second machining hole 92A positioned so that its opening faces left in the diagram, insert the second insertion gauge 8 into the second machining hole 92A to confirm the machining accuracy of the second machining hole 92A and the first machining hole 91A (refer to...). Figure 24 (a)).

[0186] After the second insertion gauge 8 is inserted into the second machining hole 92A and the machining accuracy is confirmed, the turntable 21 is rotated counterclockwise (CCW) to move the second machining hole 92B toward the front of the second insertion gauge 8. Thus, with the second machining hole 92B positioned with its opening facing left in the figure, the second insertion gauge 8 is inserted into the second machining hole 92B, and the machining accuracy of the second machining hole 92B and the first machining hole 91B is confirmed (refer to...). Figure 24 (b)).

[0187] After the second insertion gauge 8 is inserted into the second machining hole 92B and the machining accuracy is confirmed, the turntable 21 is rotated clockwise (CW) to move the second machining hole 92C toward the front of the second insertion gauge 8. Thus, with the second machining hole 92C positioned with its opening facing left in the figure, the second insertion gauge 8 is inserted into the second machining hole 92C, and the machining accuracy of the second machining hole 92C and the first machining hole 91C is confirmed (refer to...). Figure 24 (c)).

[0188] In the inspection device 1, the support column 3 that supports the workpiece 9 is fixed on the turntable 21. Therefore, the orientation of the second machining hole 92 opened on the outer periphery of the workpiece 9 can be changed simply by rotating the turntable 21.

[0189] Therefore, even when the multiple second machining holes 92 (92A, 92B, 92C) into which the second insertion gauge 8 is inserted open in different directions, the desired second machining holes 92 (92A, 92B, 92C) can be configured to face the side into which the second insertion gauge 8 is inserted simply by rotating the turntable 21. During each inspection, there is no need to change the orientation of the workpiece 9 supported by the support column 3. Therefore, the positional accuracy of the first machining hole 91 and the second machining hole 92 can be easily confirmed.

[0190] In the above embodiment, an example is a workpiece 9 having a first machining hole 91 at one end 9a in the longitudinal direction. The workpiece 9 can be any workpiece having a second machining hole 92 at at least one end (one end 9a, the other end 9b) in the longitudinal direction.

[0191] Furthermore, the example illustrates a workpiece 9 connected to a second machining hole 92 via a first machining hole 91, but it is also possible for a workpiece to be connected to multiple second machining holes 92 via a first machining hole 91. The total number of first machining holes 91 can also be appropriately determined.

[0192] As described above, the inspection device 1 of the embodiment has the following structure.

[0193] (1) Inspection device 1 is used to check the position (position accuracy) of the machining holes (first machining hole 91, second machining hole 92) provided on the workpiece 9.

[0194] The workpiece 9 is provided with: a first machining hole 91 (91A, 91B, 91C), which extends inside the workpiece 9 along the central axis C in the length direction of the workpiece 9, and is open at least one of one end 9a and the other end 9b in the length direction of the workpiece 9.

[0195] The second machining hole 92 (92A, 92B, 92C) extends radially inside the workpiece 9 along the central axis C and connects the first machining hole 91 to the outer periphery of the workpiece 9.

[0196] The inspection device 1 includes: a first insertion gauge 7 that is inserted into the first machining hole 91;

[0197] Insert the second insertion gauge 8 into the second machining hole 92.

[0198] The first insertion gauge 7 is provided with a gauge hole 71 (through hole) that passes through the opening direction of the second machining hole 92. The gauge hole 71 is located at the position that overlaps with the second machining hole 92 when the first insertion gauge 7 is inserted into the first machining hole 91 at a specified length, viewed radially from the central axis C.

[0199] A gauge part 82 is provided at the front end of the second insertion gauge 8, which concentrically connects the insertion part 84 and the abutment part 85 in series. The outer diameter of the insertion part 84 matches the inner diameter of the second machining hole 92. The abutment part 85 has an outer diameter smaller than that of the insertion part 84 and can pass through the gauge hole 71 to abut against the inner circumference of the first machining hole 91.

[0200] The gauge hole 71 is formed into a portion (side edge 711, 711) having an inner diameter that matches the outer diameter of the abutment portion 85.

[0201] Markers MK1 to MK3 are provided on the outer periphery of the insertion part 84, which can visually confirm the insertion length of the gauge part 82 into the second machining hole 92.

[0202] According to the embodiment, viewed from the opening direction of the second machining hole 92, when the first machining hole 91 and the second machining hole 92 are machined with good positional accuracy (i.e., when they have a predetermined positional degree in the radial direction of the central axis C), the abutment portion 85 of the second insertion gauge 8 passes through the gauge hole 71 of the first insertion gauge 7 and abuts against the inner circumference of the first machining hole 91 (see reference). Figure 21 ).

[0203] On the other hand, when the first machining hole 91 and the second machining hole 92 are machined with their positions offset radially from the opening direction of the second machining hole 92 on the central axis C, the abutment portion 85 of the second insertion gauge 8 interferes with the first insertion gauge 7, and cannot pass through the gauge hole 71 (see reference). Figure 22 ).

[0204] Therefore, depending on whether the first machining hole 91 and the second machining hole 92 are machined with good positional accuracy, the length of the gauge part 82 (abutment part 85) inserted into the second machining hole 92 varies.

[0205] When the first machining hole 91 and the second machining hole 92 are machined with good positional accuracy, by setting a mark at the boundary between the area inserted into the second machining hole 92 and the area not inserted in the insertion part 84, it can be confirmed by visual confirmation mark whether the first machining hole 91 and the second machining hole 92 are machined with good positional accuracy.

[0206] Therefore, according to this embodiment, the positional accuracy can be appropriately confirmed for a workpiece 9 having intersecting oil holes (machined holes).

[0207] (2) Gauge hole 71 is an elongated hole with a length in the direction of the central axis C (refer to) Figure 18 ).

[0208] Viewed from the opening direction of the second machined hole 92, the width W71 of the gauge hole 71 in the direction orthogonal to the opening direction of the first machined hole 91 and the opening direction of the second machined hole 92 is narrower than the inner diameter D92 of the second machined hole 92 (refer to...). Figure 20 ).

[0209] According to the embodiment, viewed from the opening direction of the second machining hole 92, it can be appropriately confirmed that the central axis C of the first machining hole 91 and the second machining hole 92 is radially ( Figure 21 (a) Figure 22 Is there a positional offset in the left and right directions in (a)?

[0210] When workpiece 9 is the shaft of a transmission, the radial positional accuracy requirement is high for the central axis C of the first machined hole 91 and the second machined hole 92. However, the positional accuracy in the direction of the central axis C of the first machined hole 91 and the second machined hole 92 has a lower priority than the radial positional accuracy of the central axis C.

[0211] With the configuration described above, even with some degree of positional offset in the direction of the central axis C, the radial positional accuracy of the central axis C can be properly measured. While ensuring the required positional accuracy, it is possible to suppress the decrease in yield of workpieces 9 with intersecting machined holes.

[0212] (3) Multiple first machining holes 91 (91A, 91B, 91C) are provided on the workpiece 9.

[0213] Each of the first machining holes 91 (91A, 91B, 91C) is connected to at least one of the second machining holes 92 (92A, 92B, 92C).

[0214] The number of first insertion gauges 7 is the same as the number of first machining holes 91.

[0215] Multiple first insertion gauges 7 (7A, 7B, 7C) are supported by a common gauge holder 6.

[0216] According to the embodiment, by moving the common gauge bracket 6 in the direction of the central axis C, the first insertion gauges 7 (7A, 7B, 7C) can be inserted into the first machining holes 91 (91A, 91B, 91C) respectively.

[0217] Compared to the case where a first insertion gauge 7 is inserted sequentially into each of the first machining holes 91 (91A, 91B, 91C) to check the positional accuracy of the first machining hole 91 and the second machining hole 92, it is expected that the time and operating costs required for inspection can be reduced.

[0218] (I) Markers MK1 to MK3 are provided at intervals on the insertion direction (central axis C81 direction) of the second insertion gauge 8.

[0219] If there is only one mark and the mark is located within the second machining hole 92 and cannot be visually confirmed, the operator performing the inspection needs to insert or remove the second insertion gauge 8 to confirm whether the mark is within the second machining hole 92.

[0220] For example, even if mark MK2 is located within the second machining hole 92, by setting other marks MK3 outside the second machining hole 92, even if mark MK2 cannot be visually confirmed, the presence of mark MK2 within the second machining hole 92 can be confirmed visually by checking other marks MK3. Therefore, the operator performing the inspection does not need to insert or remove the second insertion gauge 8, effectively preventing extended inspection time due to insertion / removal time. This allows for a reduction in the operating costs required for inspection.

[0221] (II) Markings MK1 to MK3 are in the circumferential direction of the insertion part 84 and the insertion direction of the second insertion gauge 8. Figure 19 A strip of a specified length is marked on the left and right sides of the middle.

[0222] According to the embodiment, the markings MK1 to MK3 are formed in a circumferential range around the axis (central axis C81) of the insertion direction (opening direction of the second machining hole 92) along the second insertion gauge 8 into the second machining hole 92.

[0223] Therefore, when inserting the second insertion gauge 8 into the second machining hole 92, there is no need to worry about the circumferential orientation around the central axis C81. By simply inserting the second insertion gauge 8 into the second machining hole 92, a visually verifiable mark can be confirmed after insertion.

[0224] When the marking is narrow in circumferential direction, such as a dot, and the marking cannot be visually confirmed, it is necessary to rotate the second insertion gauge 8 circumferentially about the central axis C81.

[0225] As described above, the markings are formed with a range around the central axis C81 in the circumferential direction, thereby eliminating the need for the operator to rotate the second insertion gauge 8 and thus appropriately preventing the time spent on inspection. As a result, a reduction in the operating costs required for inspection can be expected.

[0226] (4) The inspection device 1 has a support 3, which is equipped with a gauge bracket 6 in a movable manner. The support 3 is arranged along the central axis Z1 (rotation axis) of the turntable 21.

[0227] The support column 3 has a locking part 38 and a workpiece support 34. The locking part 38 locks the workpiece 9 which is arranged in the direction along the central axis Z1, and the workpiece support 34 elastically engages with one end 9a of the workpiece 9 in the direction of the central axis C and the length direction of the workpiece 9.

[0228] Looking from the central axis Z1 direction, the first insertion gauge 7 has an insertion hole 345 at the position where the workpiece support 34 overlaps with the first machining hole 91 of the workpiece 9.

[0229] According to the embodiment, the workpiece 9 can be held in the direction along the central axis Z1 of the inspection device 1 by means of the locking part 38 and the workpiece support 34.

[0230] Furthermore, the workpiece support 34 has an insertion hole 345 for the first insertion gauge 7, thereby allowing the first insertion gauge 7 (7A, 7B, 7C) to be smoothly inserted into the corresponding first machining holes 91 (91A, 91B, 91C) when the slider 4 moves in the direction of the central axis Z1.

[0231] Therefore, it is possible to appropriately prevent the time spent on inserting the first insertion gauge 7 into the first machining hole 91 from extending the inspection time. As a result, a reduction in the operating costs required for inspection can be expected.

[0232] (III) In the inspection device 1, a limiting part 37 is provided on the support column 3.

[0233] The limiting part 37 has a support for a positioning screw 375. When the front end 376 of the screw 375 abuts against the outer periphery (abutment groove 95) of the workpiece 9 from the radial direction of the central axis C, or is inserted into the second machining hole 92D, the rotation of the workpiece 9 is restricted.

[0234] The rotation of the workpiece 9 held by the inspection device 1 can be restricted. In particular, the front end 376 of the screw 375 abuts radially against the abutment groove 95 provided on the outer periphery of the workpiece 9, thereby appropriately restricting both the axial displacement and the circumferential rotation of the workpiece 9.

[0235] (IV) In the gauge holder 6, one end of the first insertion gauge 7 along its length is cantilevered. In the first insertion gauge 7, a gauge hole 71 is provided at the other end along its length.

[0236] By inserting the first insertion gauge 7 into the insertion holes 63 (63A, 63B, 63C) provided in the gauge bracket 6 and using the gauge bracket 6 to support one end of the first insertion gauge 7 within a specified range, the swaying of the other end of the first insertion gauge 7, which is cantilevered by the gauge bracket 6, can be suppressed.

[0237] Therefore, the first insertion gauges 7 (7A, 7B, 7C) can be smoothly inserted into the corresponding first machining holes 91 (91A, 91B, 91C).

[0238] Therefore, it is possible to appropriately prevent the time required for inspection from being extended due to the time spent inserting the first insertion gauges 7 (7A, 7B, 7C) into the first machining holes 91 (91A, 91B, 91C). As a result, it is expected that the operating costs required for inspection can be reduced.

[0239] (V) In the first insertion gauge 7, a through hole 72 is provided in the region of the insertion holes 63 (63A, 63B, 63C). The gauge holder 6 is provided with a connecting hole 613 that communicates radially with the insertion holes 63 (63A, 63B, 63C). The positioning pin 65 of the insertion connecting hole 613 engages with the through hole 72, thereby restricting the first insertion gauge 7 from falling out of the connecting hole 613 and restricting the rotation of the first insertion gauge 7.

[0240] With this configuration, by pre-preparing multiple first insertion gauges 7 of different lengths, a suitable first insertion gauge 7 can be selected and installed on the gauge holder 6 according to the length of the first machining hole 91 of the workpiece 9 being inspected. If the first insertion gauge 7 is fixed to the gauge holder 6, a gauge holder 6 with the first insertion gauge 7 needs to be prepared for each workpiece 9 being inspected. However, since the first insertion gauge 7 is replaceable, preparing only first insertion gauges 7 of different lengths is sufficient to accommodate various workpieces 9. Therefore, the total number of auxiliary parts of the inspection device 1 can be reduced, thus reducing the increase in the manufacturing cost of the inspection device 1.

[0241] (5) The inspection device 1 has a slider 4 supporting the gauge bracket 6 and a guide rail 31 that engages with the slider 4 in a manner that allows it to move in the direction of the central axis Z1.

[0242] On the support column 3, the guide rail 31 is set in the direction along the central axis Z1.

[0243] In slider 4, gauge bracket 6 is configured to rotate about the axis along the central axis Z1.

[0244] When the gauge holder 6 supports multiple first insertion gauges 7, the positional relationship between each first insertion gauge 7 and the corresponding first machining hole 91 on the workpiece 9 side may deviate when viewed from the Z direction. When the gauge holder 6 is fixed on the slider 4, it is necessary to temporarily remove the gauge holder 6 from the slider 4 to adjust the positional deviation.

[0245] Here, viewed from the Z direction, since multiple first machining holes 91 are spaced apart around the central axis C, the gauge bracket 6 in the slider 4 is configured to rotate around the axis along the Z direction. In this way, the positional relationship between each first insertion gauge 7 and the first machining hole 91 corresponding to the workpiece 9 can be adjusted simply by rotating the gauge bracket 6.

[0246] This effectively prevents the time required for inspection from being extended due to the time spent installing the gauge holder 6 onto the slider 4. Therefore, it is expected that the operating costs required for inspection can be reduced.

[0247] (VI) On the support column 3, ball-head plungers 10, 10, which act as stops that define the range of movement of slider 4 in the Z direction, are spaced apart in the Z direction.

[0248] With this configuration, the insertion length of the first insertion gauge 7 into the first machined hole 91 can be controlled by the ball-head plungers 10, 10, which act as stops. Therefore, the first insertion gauge 7 inserted into the first machined hole 91 can always be positioned at a predetermined position in the direction of the central axis C, and viewed from the opening direction of the second machined hole 92, the gauge hole 71 of the first insertion gauge 7 and the second machined hole 92 can be positioned in an overlapping position. This allows for smooth checking of the positional accuracy of the second machined hole 92 and the first machined hole 91.

[0249] (VII) The support column 3 is mounted on a turntable 21 that can rotate about the central axis Z1 along the Z direction.

[0250] In the case where the shaft of the transmission is the workpiece 9 to be inspected, there is a situation where multiple second machining holes 92 are formed on the workpiece 9 at different phases in the circumferential direction around the central shaft C.

[0251] In this case, the orientation of the workpiece 9 supported by the support column 3 can be adjusted simply by rotating the turntable 21 without removing the workpiece 9.

[0252] This allows for the appropriate prevention of extended inspection times. Consequently, it is expected to reduce the operational costs associated with inspections.

[0253] According to the embodiment, it is possible to specifically use the inspection device 1 to inspect the position of the machined hole provided on the workpiece 9.

[0254] (6) The inspection method has the following steps:

[0255] Using the workpiece holder 34 and the locking part 38, the workpiece 9 is arranged in the orientation along the central axis Z1 of the inspection device 1 (preparation process).

[0256] Move the gauge holder 6 along the central axis Z1 to insert multiple first insertion gauges 7 (7A, 7B, 7C) into the corresponding first machining holes 91 (91A, 91B, 91C) and position them in the specified positions (first insertion process).

[0257] The gauge part 82 of the second insertion gauge 8 is inserted into the multiple second machining holes 92 (92A, 92B, 92C) from the opening direction of the multiple second machining holes 92 (92A, 92B, 92C) (second insertion process).

[0258] Based on the marks MK1 to MK3 provided on the insertion part 84 of the second insertion gauge 8 that are located outside the second machining hole 92, the positional accuracy of the first machining hole 91 and the second machining hole 92 is confirmed (confirmation process).

[0259] The steps of inserting the gauge section 82 of the second insertion gauge 8 (second insertion process) and confirming the positional accuracy of the first machining hole 91 and the second machining hole 92 (confirmation process) are performed sequentially for all the second machining holes 92.

[0260] According to the implementation method, in the inspection device 1, a preparation process is performed sequentially (see reference). Figure 1 (b) First insertion process (refer to) Figure 1 (c) Second insertion process (refer to) Figure 1 (d) and confirmation process.

[0261] Furthermore, during the second insertion process, by confirming which of the multiple marks MK1 to MK3 set on the second insertion gauge 8 is located outside the workpiece 9, it is confirmed whether the two intersecting machining holes (first machining hole 91 and second machining hole 92) have been properly machined.

[0262] It is possible to confirm whether the first machining hole 91 and the second machining hole 92 are machined with good positional accuracy simply by checking the mark set on the second insertion gauge 8.

[0263] Therefore, according to the embodiment, the positional accuracy can be appropriately confirmed in a workpiece 9 having intersecting oil holes (machined holes).

[0264] The embodiments of the present invention have been described above. However, the above embodiments are merely one example of the application of the present invention and are not intended to limit the technical scope of the present invention to the specific structures of the above embodiments. Appropriate modifications can be made within the scope of the inventive concept.

[0265] Explanation of reference numerals in the attached figures

[0266] 1: Inspection device

[0267] 3: Pillar

[0268] 34: Workpiece support

[0269] 345: Through hole

[0270] 38: Locking part

[0271] 6: Gauge bracket

[0272] 7 (7A, 7B, 7C): First insertion gauge

[0273] 8: Second insertion gauge

[0274] 82: Gauge Department

[0275] 81: Gauge hole (through hole)

[0276] 84: Insertion section

[0277] 85: Contact Department

[0278] 9: Workpiece

[0279] 91 (91A, 91B, 91C): First machined hole (machined hole)

[0280] 92 (92A, 92B, 92C): Second machined hole (machined hole)

[0281] C: Central axis

[0282] MK (MK1, MK2, MK3): Marker

Claims

1. An inspection device for inspecting the positional accuracy of machined holes provided on a workpiece, characterized in that the workpiece is provided with: A first machined hole extends inside the workpiece along its central axis in the length direction and opens at least one of one end and the other end in the length direction of the workpiece. A second machined hole extends radially along the central axis inside the workpiece and communicates with the outer periphery of the workpiece. The inspection device has: A first insertion gauge is inserted into the first machined hole; A second insertion gauge is inserted into the second machined hole; A through hole is provided on the first insertion gauge, extending through the opening direction of the second machining hole. The through hole is positioned at the point where it overlaps with the second machining hole when the first insertion gauge is inserted into the first machining hole to a predetermined length, viewed radially from the central axis. The second insertion gauge has a gauge section that concentrically connects the insertion section and the abutment section in series. The outer diameter of the insertion section matches the inner diameter of the second machined hole. The abutment section has a smaller outer diameter than the insertion section and can pass through the through hole to abut against the inner circumference of the first machined hole. The through hole is formed as a portion having an inner diameter that matches the outer diameter of the abutment portion. The outer periphery of the insertion part is provided with a mark that allows visual confirmation of the insertion length of the gauge part into the second machining hole.

2. The inspection device according to claim 1, characterized in that, The through hole is an elongated hole having a length in the direction of the central axis. Viewed from the opening direction of the second machined hole, the width of the through hole in the direction orthogonal to the opening direction of the first machined hole and the opening direction of the second machined hole is smaller than the inner diameter of the second machined hole.

3. The inspection device according to claim 1 or 2, characterized in that, The workpiece is provided with a plurality of the first machining holes; Each of the first machined holes communicates with at least one of the second machined holes. The number of the first insertion gauges is the same as the number of the first machining holes. Multiple first insertion gauges are supported by a common gauge holder.

4. The inspection device according to claim 3, characterized in that, have: A support column that supports the gauge bracket so that it can move in the direction of the central axis; The locking part, supported by the support column, locks the workpiece arranged in a direction along the central axis; A workpiece support, supported by the support column, elastically engages with one end of the workpiece along its length from the central axis direction. Viewed from the central axis direction, the first insertion gauge has an insertion hole on the workpiece support at a position overlapping with the first machining hole of the workpiece.

5. The inspection device according to claim 4, characterized in that, The gauge holder is supported by a slider, which is movably supported by the support column in the direction of the central axis. The gauge holder on the slider is rotatable about an axis along the central axis.

6. An inspection method, using the inspection device of claim 4 to inspect the positional accuracy of a machined hole provided on the workpiece, the inspection method being characterized by comprising the following steps: The workpiece is positioned along the central axis using the locking part and the engaging part. The gauge holder is moved in the direction of the central axis, and a plurality of the first insertion gauges are inserted into the corresponding first machining holes and positioned in the specified positions. Insert the gauge part of the second insertion gauge into a plurality of second machining holes from the opening direction of the second machining hole, and confirm the positional accuracy of the first machining hole and the second machining hole based on the position of the mark set on the insertion part; The step of confirming the positional accuracy of the first and second machined holes is performed sequentially relative to all the second machined holes.

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