JP2007218699A - Keyway inspection method and keyway inspection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyway inspection technology which simplifies the decision work for deciding whether a keyway has been processed within processing tolerances. <P>SOLUTION: The keyway inspection system 10 comprises temporarily receiving parts 13L, 13R which are provided on both sides of a substrate 11 for temporarily receiving a crankshaft 12, which is a shaft-shaped workpiece; a pair of tailstocks 14L, 14R which are provided on the substrate 11, press the crankshaft 12 mounted against the temporarily receiving parts 13L, 13R in the axial inward direction to perform positioning in the axial direction, and rotatingly support the shaft-shaped workpiece; a phase stopper 17 which is provided on the substrate 11 and performs positioning of the workpiece crankshaft 12 supported by the tailstocks in the rotational direction; and an inspection tool 80 which provides three crankshafts 12 on the substrate 11 and decides whether the keyways of the crankshafts 12 are processed within the processing tolerances. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a key groove inspection technique for determining whether or not a dimension of a key groove processed into a workpiece is within a tolerance.

A key groove depth measuring tool is known in which a measuring tool is mounted on a key groove processed into a workpiece and the depth of the key groove is measured (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-84304 (FIG. 1)

Patent document 1 is demonstrated based on the following figure.
FIG. 16 is a diagram for explaining the basic configuration of the prior art. The keyway depth measuring tool 200 is a device for measuring the depth of the keyway 202 of the workpiece 201. The measuring tool body 203 and the measuring tool are shown in FIG. From the guide member 204 extending from the main body 203 downward in the center, the supporting arms 205 and 205 extending from the measuring instrument main body 203 obliquely downward to the left and right, the dial gauge 206 provided on the upper part of the measuring instrument main body 203, and the dial gauge 206 And a measuring element 207 that penetrates the guide member 204 and extends downward.

  Then, the guide member 204 is fitted into the key groove 202, the support arms 205 and 205 are brought into contact with the outer peripheral surface of the work 201, the measuring element 207 is brought into contact with the bottom of the key groove 202, and the value of the dial gauge 206 is read. By comparing the reading of the dial gauge 206 with a predetermined reference value, it is possible to determine whether the depth of the key groove 202 is processed within a predetermined tolerance.

However, according to the apparatus of Patent Document 1, in order to bring the probe 207 into contact with the bottom of the key groove 202, it is necessary to remove oil, foreign matter, and the like attached to the key groove 202 before measurement. In addition, it is necessary to compare the reading of the dial gauge 206 with a predetermined reference value. For this operation, the difference between the two values is calculated, and the calculated value is compared with the tolerance. Is necessary and the work becomes complicated.
There is a need for a keyway inspection technique that can greatly simplify the operation of determining whether or not a keyway has been machined within machining tolerances.

  It is an object of the present invention to provide a key groove inspection technique capable of greatly simplifying the operation of determining whether or not a key groove is processed within a processing tolerance.

  The invention according to claim 1 corresponds to the first inspection tool corresponding to the upper tolerance and the lower tolerance in the key groove inspection method for determining whether or not the dimension of the key groove processed into the workpiece is within the tolerance. A second inspection tool to be prepared, a step of passing the first inspection tool and the second inspection tool through the key groove while rotating the first inspection tool and the second inspection tool around the key groove processing reference point, and the first inspection tool is a key groove in this step And the step of determining that the key groove is within tolerance when the second inspection tool passes through the key groove without passing through the key groove.

  The invention according to claim 2 is characterized in that the dimension of the key groove is a depth dimension of the key groove.

  The invention according to claim 3 is characterized in that the dimension of the key groove is the width dimension of the key groove.

  According to a fourth aspect of the present invention, a pair of tailstocks that rotatably support a shaft-shaped workpiece, a phase stopper that determines a position in the rotation direction of the workpiece supported by these tailstocks, and a workpiece to be inspected are provided. The first inspection tool corresponding to the upper tolerance and the second inspection tool corresponding to the lower tolerance with respect to the dimensional tolerance of the key groove, and the first inspection tool and the second inspection tool can be rotated to the key groove processing reference point. And a handle for rotating the first inspection tool and the second inspection tool.

  In the invention which concerns on Claim 5, a 1st test tool and a 2nd test tool are test tools which measure the depth of a keyway, It is characterized by the above-mentioned.

  In the invention which concerns on Claim 6, a 1st test tool and a 2nd test tool are test tools which measure the width | variety of a keyway, It is characterized by the above-mentioned.

  In the invention according to claim 1, when the first inspection tool does not pass through the key groove and the second inspection tool passes through the key groove, it is determined that the key groove is within tolerance. When both the first inspection tool and the second inspection tool pass through the key groove, it is determined that the key groove is out of tolerance. Even when both the first inspection tool and the second inspection tool do not pass through the key groove, it is determined that the key groove is out of tolerance.

  That is, according to the method of the present invention, the key groove is within the tolerance only by rotating the first inspection tool and the second inspection tool around the key groove processing reference point and checking whether or not the key groove passes through. Since it can be determined whether or not there is, the determination work can be greatly simplified. In addition, since the determination work is simplified, a difference in the determination result hardly occurs depending on the skill level of the worker, and the reliability of the inspection can be further improved.

  In the invention according to claim 2, since the dimension of the key groove is the depth dimension of the key groove, the determination work related to the depth dimension of the key groove can be simplified.

  In the invention according to claim 3, since the dimension of the key groove is the width dimension of the key groove, it is possible to simplify the determination work related to the length in the width direction of the key groove.

  In the invention according to claim 4, the keyway inspection device includes a pair of tailstock, a workpiece phasing stopper, a first inspection tool, a second inspection tool, an inspection tool support member, and a handle. Constitute. All of these elements are simple structures, and it is possible to easily achieve cost reduction and downsizing of the keyway inspection device.

  In the invention according to claim 5, since the first inspection tool and the second inspection tool are inspection tools for measuring the depth of the key groove, the key groove depth determination work can be facilitated.

  In the invention which concerns on Claim 6, since the 1st test tool and the 2nd test tool are test tools which measure the width | variety of a keyway, the ease of the width direction length determination operation | work of a keyway can be aimed at.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a front view of a keyway inspection device according to the present invention. A keyway inspection device 10 is provided with a substrate 11 and a temporary receiving portion 13L for temporarily receiving a crankshaft 12 provided on the substrate 11 and serving as a workpiece. , 13R, and the tailstocks 14L and 14R, which are provided on the left and right sides of the substrate 11 and press the left and right end surfaces of the crankshaft 12 to position the crankshaft 12 in the axial direction. The first to third inspection parts 21 for determining whether or not a key stopper provided on the substrate 11 and processed on the crankshaft 12 is processed within a predetermined tolerance range. ˜23 are the main components.
24... (... indicates a plurality. The same shall apply hereinafter), 25.

FIG. 2 is a plan view of the keyway inspection device according to the present invention. The keyway inspection device 10 includes temporary receiving portions 13L and 13R provided on the left and right sides of the substrate 11 and the temporary receiving portions 13L and 13R. Tailstocks 14L, 14R provided on the outside, and spindle shafts 26, 26 provided for gripping the crankshaft 12, which is a workpiece, inwardly from these tailstocks 14L, 14R.
The first to third inspection units 21 to 23 are rotatably provided with inspection tools 80 for determining whether the keyway is processed within the tolerance.

  That is, the keyway inspection device 10 is provided on the substrate 11 with two left and right provisional receiving portions 13L and 13R that temporarily receive the crankshaft 12 that is a shaft-shaped workpiece, and on the substrate 11 and placed on the temporary receiving portions 13L and 13R. A pair of tailstocks 14L and 14R that are pressed inward in the axial direction of the crankshaft 12 and axially positioned and rotatably support the crankshaft 12, and a crank that is provided on the substrate 11 and supported by the tailstocks 14L and 14R A phase stopper 17 that positions the shaft 12 in the rotational direction and an inspection tool 80 that includes three crankshafts 12 on the substrate 11 and measures whether the keyway of the crankshaft 12 is machined within the machining tolerance.

  As apparent from FIGS. 1 and 2, the keyway inspection device 10 includes a pair of tailstocks 14L and 14R, a workpiece phasing stopper 17, and a first inspection tool 81 (see FIG. 5 described later). The second inspection tool 82 (see FIG. 10 described later), the inspection tool support member 72 (see FIG. 5), and the handle 83 (see FIG. 5). All of these elements are simple structures, and the cost reduction and downsizing of the keyway inspection device 10 can be easily achieved.

Details of the tailstock will be described with reference to FIGS.
3 is a cross-sectional view taken along line 3-3 in FIG. 1. The tailstock 14R includes a substrate 11, a seat plate 41 attached to the substrate 11 via fastening members 25, and the seat plate 41. Leg members 42, 42 fixed to the leg members 42, a tail push holder 43 attached on the leg members 42, 42, a tail push member 44 provided inside the tail push holder 43, and a spindle shaft inserted into the tail push member 44 26, a holding plate 46 extending upward from the center push holder 43, a holding arm 47 extending laterally from the holding plate 46 and holding an operating arm 56 described later, and horizontally inserted into the leg members 42 and 42. An arm shaft 51, an arm member 52 provided on the arm shaft 51 so as to be swingable in the back-and-front direction, and an operating arm 56 provided on the upper portion of the arm member 52 so as to be tiltable in the direction of arrow P via a sub-shaft 54; It includes a shaft member 59 which the elongated hole 57 bored in the holder 43 press heart is attached by screwing to the push member 44 through extending outwardly, a bearing member 61 attached to the other end 59b of the shaft member 59, a. The shaft member 59 and the bearing member 61 are movably provided along with the swing of the arm member 52 by disposing the elongated hole 58 of the arm member 52 outside the bearing member 61. 48 and 49 are nuts.

  4 is a cross-sectional view taken along the line 4-4 of FIG. Indicates holding.

  The tail pushing portion 63 includes a tail pushing holder 43 and a tail pushing member 44 that are fixed to the leg member 42, a rear lid member 64 that guides the tail pushing member 44 to a rear portion of the tail pushing holder 43, and the rear lid member 64. A spring member 65R for urging the center pushing member 44 by being set to the center, a center pushing member 44 fitted so as to be pressed against the spring member 65, and a spindle shaft which is inserted into the hole 43h of the center pushing holder 43 and supports the workpiece 26 and a front lid member 66 that guides the attachment center pushing member 44 to the front portion of the tail pushing holder 43 are main components. 68 and 68 are O-rings, and 69 and 69 are grease cups.

  The center pushing member 44 is a member that receives a resilient force toward the left side of the drawing by the spring member 65R. A shaft member 59 is screwed into the tail pushing member 44 in the reverse direction from the diagram. By holding the shaft member 59 by the arm member 52, the movement of the tail pushing member 44 in the arrow g direction can be restricted. The arm member 52 is provided so as to be swingable left and right around the arm shaft 51. The operating arm 56 is extended above the arm member 52, and the operating arm 56 is applied to the holding arm 47 so that the swinging of the arm member 52 can be regulated.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1 and shows a first inspection portion 21 that inspects the first keyway and a temporary receiving portion 13L provided on the upper portion of the first inspection portion 21.
The first inspection unit 21 includes a substantially U-shaped body member 71 attached to the substrate 11, an inspection tool support member 72 as a shaft member that is rotatably passed to the upper portion of the body member 71, and the inspection tool support member 72. The inspection device 80 includes an attachment first inspection device 81 and a second inspection device 82, and a handle 83 that is provided on the inspection device support member 72 so that the attachment inspection device 80 can be rotated.

The temporary receiving portion 13 </ b> L includes receiving pieces 85, 85 on the left and right upper surfaces of the body member 71.
86 and 86 are spacers, and 87 and 87 are small bearings.
In addition, the structure and operation of the second inspection unit (reference numeral 22 in FIG. 1) and the third inspection part (reference numeral 23 in FIG. 1) are not different from those of the first inspection part 21, and the description thereof is omitted.

  FIG. 6 is an enlarged view of 6 parts in FIG. 1. The inspection tool 80 includes a first inspection tool 81 corresponding to the upper tolerance and a first tolerance corresponding to the lower tolerance with respect to the dimensional tolerance of the key groove provided on the workpiece to be inspected. 2 inspection tools 82 and an inspection tool support member 72 that rotatably supports the first inspection tool 81 and the second inspection tool 82 at a keyway machining reference point 89. The handle was omitted.

  The key groove processing reference point 89 is a rotation center of a milling cutter when the key groove is formed by cutting with a milling cutter as a tool, for example. The keyway processing reference point coincides with the rotation center of the inspection tool.

  The inspection tool 80 is provided so as to be rotatable about the keyway machining reference point 89, and passes when the first inspection tool 81 does not pass through the keyway k and the second inspection tool 82 passes through the keyway k. And other than that, it was determined to be unacceptable.

  The length between the key groove processing reference point 89 of the first inspection tool 81 and the outer peripheral surface 91 is a length corresponding to the maximum depth of the key groove k, and the key groove processing reference point 89 of the second inspection tool 82. The length between the outer peripheral surface 92 and the outer peripheral surface 92 corresponds to the minimum depth of the key groove k.

  Returning to FIG. 5, a first inspection tool 81 corresponding to the upper tolerance and a second inspection tool 82 corresponding to the lower tolerance are provided, and an inspection tool support member 72 that rotatably supports these is provided. Since the handle 83 for rotating the tool 81 and the second inspection tool 82 is provided, it is possible to facilitate the operation of determining whether the keyway k is within the tolerance range by simply rotating the handle 83. A series of operations relating to the inspection of the keyway k can be easily and reliably performed by an inexperienced operator without requiring skill.

  7 is a view taken in the direction of arrow 7 in FIG. 1. The temporary receiving portion 13R includes a seat plate 41 attached to the substrate 11 with fastening members 24, a receiving piece 93 extending upward from the seat plate 41, and a seat. The reinforcing piece 94 is interposed between the plate 41 and the receiving piece 93.

FIG. 8 is a view taken in the direction of the arrow 8 in FIG. 1 and shows a phase stopper for positioning the crankshaft 12 in the rotational direction. The phase stopper 17 includes a seat member 95 attached on the substrate 11 with fastening members 24... And a guide member 97 provided with a guide surface 96 extending upward from the seat member 95 and contacting the pin portion 101 of the crankshaft 12. Become. The guide surface 96 is a surface perpendicular to the substrate 11.
In the figure, 98 is the web portion of the crankshaft 12, 102 is the center of the tailstocks 14L and 14R, and 103 is the center of the pin portion 101.

  The crankshaft 12 is positioned in the rotational direction by rotating the crankshaft 12 around the center 102 of the tailstock in the direction of the arrow 104 and bringing the pin portion 101 of the crankshaft 12 into contact with the guide surface 96. Is possible.

  FIG. 9 is an operation diagram of the tailstock according to the present invention. When the crankshaft 12 as a work is set on the temporary table and the operating arm 56 is pulled toward the front of the figure, the operating arm 56 by the holding arm 47 is shown. This means that the tail push member 44 moves in the direction of the arrow r and grips the crankshaft 12 by the spring member (reference numeral 65R in FIG. 4).

  After gripping the crankshaft 12, the crankshaft 12 is slightly separated from the temporary receiving portions (reference numerals 13L and 13R in FIG. 1), so that the temporary receiving portion and the crank are positioned at the time of positioning of the crankshaft 12 in the rotational direction. It is possible to eliminate the possibility of problems due to sliding with the shaft.

  When releasing the grip of the crankshaft 12, the operating arm 56 is swung in the direction of the arrow a while pulling the operating arm 56 toward the front, and is placed on the holding arm 47, so that the position of the spindle shaft 26 is retracted. It is possible to return to the end.

The structure of the right tailstock 14R has been described above, but the left tailstock 14L has the same structure as the right tailstock 14R and will not be described.
However, because of the positioning of the crankshaft 12 in the axial direction, the spring constant of the spring member 65R is determined by making a difference in the magnitude of the spring constant of the spring member 65 housed in the tailstocks 14L and 14R on the left and right sides. Use one that is higher than the spring constant of the left spring member.

FIG. 10 is a diagram for explaining the measurement principle by the inspection tool according to the present invention. For easy understanding, the keyway k of the workpiece W is arranged upward, and the inspection tool 80 is placed above the keyway k. Although arranged, there is no difference from the present embodiment in principle.
The key groove k formed on the workpiece W by rotating the inspection tool 80 including the inspection tool support member 72 passing through the key groove processing reference point 89 serving as the center of rotation of the first inspection tool 81 and the second inspection tool 82. Pass through.

  Specifically, the first inspection tool 81 on the stationary side corresponding to the upper tolerance is rotated in the direction of the arrow s, and the second inspection tool 82 on the street side corresponding to the lower tolerance is rotated in the direction of the arrow t. When the first inspection tool 81 does not pass through the key groove k and the second inspection tool 82 passes through the key groove k, it is determined that the key groove k is within the tolerance range. The operation will be described in the next figure.

FIG. 11 is an operation diagram of FIG. 10, in which a thick line 101 indicates the bottom surface of the key groove k, 102 indicates a tolerance above the key groove k, and 103 indicates a tolerance below the key groove k.
(A) shows that when the bottom surface of the key groove is between the upper tolerance 102 and the lower tolerance 103, when the first inspection tool 81 on the stationary side is rotated to the key groove k, it hits the bottom surface 101 of the key groove k. Indicates not to pass.

  (B), when the bottom surface of the key groove is between the upper tolerance 102 and the lower tolerance 103, when the second inspection tool 82 on the passing side is rotated to the key groove k, it hits the bottom surface 101 of the key groove k. It shows that it passes without.

(C) shows that when the bottom surface of the key groove is below the lower tolerance 103, that is, when the key groove k is too shallow, the first inspection tool 81 on the stationary side is rotated to the key groove k. It shows that it does not hit the bottom surface 101 of the groove k.
(D) shows that when the second inspection tool 82 on the passing side is rotated to the key groove k when the key groove k is too shallow, it does not hit the bottom surface 101 of the key groove k and pass through.

  (E) shows that when the bottom surface 101 of the key groove k is above the upper tolerance 102, that is, when the key groove k is too deep, the first inspection tool 81 on the stop side is rotated to the key groove k. , It shows passing through without hitting the bottom surface 101 of the key groove k.

  (F) shows that when the bottom surface of the key groove is above the upper tolerance 102, that is, when the key groove k is too deep, the second inspection tool 82 on the passing side is rotated to the key groove k, the key It shows passing without hitting the bottom face 101 of the groove k.

  The following table summarizes the above (a) to (f). Only when the depth of the keyway is within the tolerance range, the first inspection tool does not pass through the keyway, and the second Indicates that the inspection tool passes through the keyway.

The operation of the keyway inspection apparatus described above will be described next.
FIG. 12 is an operation diagram in which the inspection jig according to the present invention is applied to the determination of the key groove of the crankshaft, and the movement of the inspection tool 80 when the depth of the key groove k of the crankshaft 12 is within the tolerance range. Show.
(A) shows the position of the 1st inspection tool 81 and the 2nd inspection tool 82 just before gripping the crankshaft which is the workpiece | work W with the spindle 26, and measuring the depth of the keyway k.

(B) shows that the first inspection tool 81 stops when the first inspection tool 81 on the stop side is rotated in the direction of the arrow u toward the key groove k.
(C) indicates that the second inspection tool 82 passes through the key groove k when the second inspection tool 82 on the street side is rotated in the direction of the arrow v toward the key groove k.
Therefore, from (a) to (c), it can be determined that the depth of the keyway k is within the tolerance range.

That is, in the keyway inspection method for determining whether or not the dimension of the keyway processed into the workpiece is within the tolerance, the keyway inspection method includes the first inspection tool 81 corresponding to the upper tolerance and the lower tolerance. A step of preparing a second inspection tool 82 corresponding to the above, a step of passing the first inspection tool 81 and the second inspection tool 82 through the key groove k while rotating the key groove processing reference point 89 as a center, The first inspection tool 81 does not pass through the key groove k, and when the second inspection tool 82 passes through the key groove k, the key groove k is determined to be within tolerance.
In the present embodiment, the dimension of the key groove k is the depth dimension of the key groove k.

  In general, the method of checking the dimension of the key groove k is that an operator inserts a dial gauge into the key groove k to read a measured value, or the first inspection tool 81 corresponding to the upper tolerance in the key groove k and the lower There is a method of determining by inserting the second inspection tool 82 corresponding to the tolerance individually. These methods include complicated operations such as reading of measurement values and changing inspection tools.

In this regard, according to the method of the present invention, the key groove k is within the tolerance only by rotating the first inspection tool 81 and the second inspection tool 82 around the key groove processing reference point (reference numeral 89 in FIG. 10). Since it is possible to determine whether or not there is, it is possible to greatly facilitate the determination work. In addition, since the determination work becomes easy, the difference in the determination result hardly occurs depending on the skill level of the inspection of the worker, and the reliability of the inspection can be further improved.
As a result, the determination work related to the depth dimension of the keyway k can be greatly simplified.

  Further, since the tailstocks 14L and 14R and the phase stopper 17 for determining the position of the workpiece W supported by the tailstocks 14L and 14R in the rotation direction are provided, the positioning work of the workpiece W and the keyway k can be easily performed. Can be achieved.

  FIG. 13 is a diagram of another embodiment of FIG. 10, and the point changed from FIG. 10 is that the inspection tool is configured to determine the width of the key groove instead of the depth of the key groove. There is no difference from FIG.

  Specifically, when the first inspection tool 81B on the stationary side corresponding to the tolerance in the width direction and the second inspection tool 82B on the street side corresponding to the tolerance in the width direction are rotated, the first inspection tool 81B is the key. When the second inspection tool 82B passes through the key groove without passing through the groove, the key groove is determined to be within the tolerance range in the width direction. The operation will be described in the next figure.

FIG. 14 is an operation diagram of FIG.
(A) shows that when the width of the key groove is within the tolerance range, if the first inspection tool 81B on the stationary side is rotated to the key groove k1, it interferes with the workpiece W and does not pass through the key groove k1.
(B) shows that when the width of the key groove is within the tolerance range, the second inspection tool 82B on the passing side is rotated to the key groove k1, so that it passes without hitting the side walls 111, 111 of the key groove k1. Show.

(C) When the width of the key groove is outside the tolerance range and the width of the key groove is too narrow, if the first inspection tool 81B on the stationary side is rotated to the key groove k2, the key groove hits the surface of the workpiece. Indicates that k2 is not passed.
(D) shows that when the width of the key groove is outside the tolerance range and the key groove k2 is too narrow, when the second inspection tool 82B on the passing side is rotated to the key groove k2, the key groove k2 hits the surface of the workpiece. Indicates not to pass.

  (E) shows that when the width of the key groove is out of the tolerance range and the width of the key groove is too wide, the first inspection tool 81B on the stationary side is rotated to the key groove k3, and the side walls 112, 112 of the key groove are formed. Shows that you pass without hitting.

  In (f), when the width of the key groove is out of the tolerance range and the width of the key groove is too wide, when the second inspection tool 82B on the passing side is rotated to the key groove k3, the side walls 112, 112 of the key groove. Shows that you pass without hitting.

  Table 2 summarizes the above (a) to (f). Only when the width of the keyway is within the tolerance range, the first inspection tool does not pass through the keyway, and the second inspection tool is It can be seen that it passes through the keyway.

FIG. 15 is a view for explaining the inspection principle of the inspection tool that can determine the depth of the keyway and the length in the width direction of the keyway according to the present invention. Regarding the inspection tool for determining the depth, the first inspection tool 81C on the street side and the second inspection tool 82C on the stationary side are arranged in order from the left side to the right side of the drawing, and the inspection tool for determining the width of the keyway. Next to the right side of the second inspection tool 82C, the width direction second inspection tool 82D, which is the stationary side, and the right side of the width direction second inspection tool 82D, the first width direction first to determine the width of the keyway. An inspection tool 81D is arranged.
By arranging the first inspection tools 81C and 81D on the passing side outside the second inspection tools 82C and 82D on the stationary side in this way, both the depth of the key groove k and the width of the key groove k can be quickly and reliably obtained. It can be easily determined.

Although the present invention is applied to the key groove provided on the crankshaft of the engine in the embodiment, it may be applied to the key groove provided on the shaft member.
In the present embodiment, there are three places where the inspection unit is installed. However, the present invention is not limited to this, and the number of key grooves that need to be determined on the work can be set.

  The present invention is suitable for inspecting a key groove provided on an engine crankshaft.

It is a front view of the inspection apparatus of the keyway which concerns on this invention. It is a top view of the inspection apparatus of the keyway which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. 6 is an enlarged view of a portion 6 in FIG. FIG. 7 is a view taken in the direction of arrow 7 in FIG. 1. FIG. 8 is a view taken in the direction of arrow 8 in FIG. 1. It is an effect | action figure of the tailstock which concerns on this invention. It is a figure explaining the measurement principle by the inspection tool which concerns on this invention. It is an effect | action figure of FIG. It is an action figure which applies the inspection jig concerning the present invention to judgment of the keyway of a crankshaft. It is another Example figure of FIG. It is an effect | action figure of FIG. It is a figure explaining the measurement principle of the inspection tool which can determine the depth of the keyway which concerns on this invention, and the width direction length of a keyway. It is a figure explaining the basic composition of the conventional technology.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Keyway inspection apparatus, 14L, 14R ... Tailstock, 17 ... Phase stopper, 72 ... Inspection tool support member, 81, 81B, 81C, 81D ... First inspection tool, 82, 82B, 82C, 82D ... 2 inspection tools, 83 ... handle, 89, 89C ... keyway processing reference point, W ... work, k, k1, k2, k3 ... keyway.

Claims (6)

  In a keyway inspection method for determining whether or not a dimension of a keyway processed into a workpiece is within a tolerance, a first inspection tool corresponding to an upper tolerance and a second inspection tool corresponding to a lower tolerance are prepared. A step of rotating the first inspection tool and the second inspection tool around the key groove processing reference point, and passing the key inspection tool through the key groove while rotating the first inspection tool and the second inspection tool. And a step of determining that the key groove is within tolerance when the second inspection tool passes through the key groove.   The key groove inspection method according to claim 1, wherein the dimension of the key groove is a depth dimension of the key groove.   3. The keyway inspection method according to claim 1, wherein the dimension of the keyway is a width dimension of the keyway.   A pair of tailstocks that rotatably support shaft-shaped workpieces, phase stoppers that determine the rotational position of the workpieces supported by these tailstocks, and dimensional tolerances of key grooves provided on the workpiece to be inspected A first inspection tool corresponding to the tolerance of the second inspection tool, a second inspection tool corresponding to the lower tolerance, and an inspection tool support member for rotatably supporting the first inspection tool and the second inspection tool at the keyway machining reference point A keyway inspection device comprising: a handle for rotating the first inspection tool and the second inspection tool.   The key groove inspection device according to claim 4, wherein the first inspection tool and the second inspection tool are inspection tools for measuring a depth of the key groove.   6. The key groove inspection device according to claim 4, wherein the first inspection tool and the second inspection tool are inspection tools for measuring a width of the key groove.

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