JP3937076B2 - Method and apparatus for measuring thread shape of threaded metal container - Google Patents

Method and apparatus for measuring thread shape of threaded metal container Download PDF

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Publication number
JP3937076B2
JP3937076B2 JP2001305065A JP2001305065A JP3937076B2 JP 3937076 B2 JP3937076 B2 JP 3937076B2 JP 2001305065 A JP2001305065 A JP 2001305065A JP 2001305065 A JP2001305065 A JP 2001305065A JP 3937076 B2 JP3937076 B2 JP 3937076B2
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Japan
Prior art keywords
threaded metal
measuring
thread
container
contact
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JP2001305065A
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Japanese (ja)
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JP2003106823A (en
Inventor
幹雄 木本
敦 金川
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Takeuchi Press Industries Co Ltd
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Takeuchi Press Industries Co Ltd
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Description

【０００１】
【発明の属する技術分野】
この発明は物体形状の測定方法及び装置に関し、さらに詳しくは投影機に補助治具を設けることにより、より測定精度及び測定効率の良い物体形状の測定方法及び装置に関する。
【０００２】
【従来の技術】
従来、ねじ付金属容器、エアゾール容器等の物体形状の各部の寸法、直径、ねじ山の高さを測定する方法としては、図８及び図９に示す測定方法及び装置がある。５０は投影機であり、この投影機５０のステージガラス５１上に載置された被投影物体であるねじ付金属容器５２によって生じる影の映像を平行光として、受光レンズ５３を通して結像し、この映像をＬＡＮケーブル５４でパソコン（図示せず）の画面上に写し出し、この投影画像の２次元座標データを使って、ねじ付金属容器５２の各部の長さ、直径又は角度等を演算して測定値としていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような従来の測定方法においては、図９に示すように、パソコン画面上に写し出されたねじ付金属容器５２の投影画像の容器口部５２ａのねじ山の高さ、ねじの外径等を測定する場合において、投影画像を２次元座標データを用いることにより算出してその値を得ていた。例えば、図９に示すようにねじ山の外径Ｄ、谷径ｄについては、各々の両側の基準端を指定し、その基準端間の距離Ｄ、ｄを測定し、（Ｄ−ｄ）／２という単純計算によりねじ山の高さの値を得ていたが、これは平均値にすぎないため、誤差があり、特定の部位のねじ山の高さの値を得ることはできない欠点があった。又、容器口部５２ａの中心軸と測定の中心軸とを一致させる操作が面倒であり、手数を必要とする欠点があり、全体としての測定精度及び効率が悪いという問題があった。
【０００４】
この発明は、このような従来の課題に着目してなされたもので、投影機に補助治具を設けることにより、測定精度及び測定効率の良い物体形状の測定方法及び装置を提供することを目的とする。
【０００５】
この課題を解決するため、請求項１記載の発明に対応する手段は、投影機により投影されたねじ付き金属容器の投影画像を、該投影機に連結したパソコンに送信し、パソコンの画面上にて前記投影画像を写し出すと共に、投影画像の２次元座標データから、ねじ山の高さ等を演算するねじ付き金属容器のねじ山形状の測定方法において、前記ねじ付き金属容器の容器口部のねじ部側面に、そのねじ部側面と接触する面およびその面と平行の測定基準孔とを備えた右接触杆を接触させ、前記測定基準孔を基準端として、ねじ山の高さを測定することを特徴とするねじ付き金属容器のねじ山形状の測定方法である。
【０００６】
請求項２記載の発明に対応する手段は、中心固定治具を容器口部先端に上方から接触させると共に、容器口部のねじ部側面と接触する面を備えた左接触杆をねじ部側面に接触させることにより、左接触杆のねじ部面と接触する面を基準端として、ねじ外径、ねじスカート高さ又はスカート角を測定することを特徴とするねじ付き金属容器のねじ山形状の測定方法である。
【０００７】
請求項３記載の発明に対応する手段は、中心固定治具を容器口部先端に上方から接触させながら、ねじ山高さを測定することを特徴とするねじ付き金属缶のねじ山形状の測定方法である。
【０００８】
請求項４記載の発明に対応する手段は、固定盤上に、パソコンと連結された投影機と、該投影機の被投影体であるねじ付き金属容器を回転自在に支持するホルダーと、該ホルダーに胴部が支持されたねじ付き金属容器を測定するために、ねじ付き金属容器の口部上端と接触してねじ付き金属容器を正確に固定する進退自在の中心固定治具と、ねじ付き金属容器の口部側面に接触して、ねじ山の高さ、長さ、直径又は角度を測定するための基準端となる進退自在の左接触杆および右接触杆とを設け、前記右接触杆に口部側面と接触する面およびその面と平行の測定基準孔とを設けたことを特徴とするねじ付き金属容器のねじ山形状の測定装置である。
【０００９】
請求項５記載の発明に対応する手段は、前記左接触杆及び右接触杆は、固定盤上に固設された下ブロックのレール上を、各々上ブロックと一体となってスライドするように、上ブロックに固設されていることを特徴とするねじ付き金属容器のねじ山形状測定装置である。
【００１０】
【発明の実施の形態】
図１〜図７は、この発明に係る物体形状の測定方法及び装置を示す図面である。図中１は、固定盤７上に固設された投影機であり、この投影機１により被投影物体であるねじ付金属容器３の容器口部３ａが投影される。具体的には、投影機１の受光レンズ１ａを通じて、容器口部３ａの投影画像を連結されたパソコン（図示せず）の画面上に写し出し、この投影画像の２次元座標データを使って、測定値を算出することができる。
【００１１】
被投影物体であるねじ付金属容器３の容器口部３ａは、ホルダー５によって保持されてステージガラス１ｂ上に固定される。ホルダー５は、図２に示すように、ハンドル５ａの操作により、回転及び進退自在に構成されている。そして、容器口部３ａの先端部の中心には、上方から中心固定治具９が接触し、かつ容器口部３ａの側面には、左測定基準治具６の左接触杆６ａが進退自在に接触している。図４に示すように、パソコンの画面上でこの状態を確認すると、中心固定治具９が容器口部３ａの先端部の中心において、口部端面に接触し、左接触杆６ａが、容器口部３ａのスカート部３ｂに接触している。このように中心固定治具９及び左接触杆６ａにより、容器口部３ａを規制することにより、容器口部３ａは測定位置に確実にセッティングすることができる。
【００１２】
そして、図４に示すように、容器口部３の口部３ｃの外径を測定する場合は、基準端枠Ａ内において、両方の基準端Ｈを指定することにより、この距離を測定することにより口部３ｃの値を得ることができる。また、ねじ部３ｄの外径を測定する場合は、基準端枠Ｂ内において、両方の基準端Ｉを指定することにより、この距離を測定することによりねじ部３ｄの外径の値を得ることができる。さらに、スカート部３ｂの外径を測定する場合は、基準端枠Ｃ内において、両方の基準端Ｊを指定することにより、同様にスカート部３ｂの外径の値を得ることができる。
【００１３】
次に、図５に示すように、スカート高さＬ及びスカート角θを測定する場合は、図５に示すように、各々のポイントを指定することにより測定が可能となる。スカート高さＬは、スカート部３ｂ下側に位置する直線部であるポイントＹとポイントＺを結ぶ直線ＹＺを延長し、この延長線と左接触杆６ａがスカート部３ｂに接触するポイントＪの延長線Ｗとの交点であるポイントＸ（仮想点）を指定し、このポイントＸから口部３ｃの先端部までの距離Ｌを測定することにより、スカート高さＬの値を得ることができる。又、スカート角θは、ポイントＹとポイントＺを結ぶ直線ＹＺの延長線と、ポイントＸにおける水平線とのなす角θを測定することにより、スカート角θの値を得ることができる。
【００１４】
次に、右測定基準治具８の右接触杆８ａを使って、ねじ山の高さを測定する場合は、図７に示すように右接触杆８ａの先端部を、容器口部３ａの側面に接触させることにより、正確なねじ山の高さの値を得ることができる。図７に示すように、容器口部３ａの先端部の中心には、上方から中心固定治具９が接触することにより、容器口部３ａの中心軸と測定の中心とを一致させることができる。右接触杆８ａの先端には、容器口部３ａの中心軸と平行に穿設される基準孔８ｂが穿設され、基準枠Ｄ内において、この基準孔８ｂの基準端Ｓから、最長の基準端Ｉと、最小の基準端Ｋを指定することにより、ＩとＫの距離の差を算出して、ねじ山の高さの値を得ることができる。このようにして、容器口部３ａを回転して、特定の部位のねじ山の高さを正確に測定することができる。
【００１５】
次に、この発明に係る測定装置について説明する。固定盤７上には、投影機１が固設され、この投影機１はパソコン（図示せず）と一体、又はＬＡＮケーブル２等で連結されている。投影機１に対向する部位には、被投影物体であるねじ付金属容器３が、ホルダー５に保持され、ステージガラス１ｂ上に固定されている。ホルダー５は、ベアリングにより回転自在に構成され、かつレール４上を進退自在にスライドする。ホルダー５の両側には、ねじ付金属容器３の容器口部３ａの側面と接触する左接触杆６ａ及び右接触杆８ａを有する左測定基準治具６及び右測定基準治具８が設けられている。この左測定基準治具６及び右測定基準治具８は、上ブロック１１、１２及び下ブロック１０、１３から構成され、左右の接触杆６ａ、８ａを有する上ブロック１１、１２は、図３及び図５に示すように、固定盤７上に固設された下ブロック１０、１３のレール上を進退自在にスライドすることにより、左右の接触杆６ａ、８ａを接触又は離接自在とすることができる。
【００１６】
【発明の効果】
以上説明してきたように、この発明によれば投影機に補助治具を設ける測定方法により、測定精度及び測定効率を著しく向上することができる効果を有する。
【図面の簡単な説明】
【図１】この発明に係る物体形状の測定装置を示す平面図。
【図２】この発明に係る物体形状の測定装置を示す右側面図。
【図３】この発明に係る測定装置の左測定基準治具を示す平面図。
【図４】この発明に係る測定装置の中心固定治具及び左測定基準治具を用いて、容器口部を測定している状態を示す図面。
【図５】この発明に係る測定装置の中心固定治具及び左測定基準治具を用いて、容器口部を測定している状態を示す図面。
【図６】この発明に係る測定装置の右測定基準治具を示す平面図。
【図７】この発明に係る測定装置の中心固定治具及び右測定基準治具を用いて、容器口部を測定している状態を示す図面。
【図８】従来の投影機を用いて、容器口部を測定している状態を示す正面図。
【図９】従来の測定装置を用いて、容器口部を測定している状態を示す図面。
【符号の説明】
１ 投影機
３ａ 容器口部
５ ホルダー
６ 左測定基準治具
６ａ 左接触杆
７ 固定盤
８ 右測定基準治具
８ａ 右接触杆
９ 中心固定治具
１０ １３ 下ブロック
１１ １２ 上ブロック[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an object shape measuring method and apparatus, and more particularly to an object shape measuring method and apparatus having better measurement accuracy and measurement efficiency by providing an auxiliary jig in a projector.
[0002]
[Prior art]
Conventionally, as a method for measuring the size, diameter, and thread height of each part of an object shape such as a threaded metal container and an aerosol container, there are measurement methods and apparatuses shown in FIGS. Reference numeral 50 denotes a projector. An image of a shadow generated by the screwed metal container 52 that is an object to be projected placed on the stage glass 51 of the projector 50 is imaged as parallel light through the light receiving lens 53. The image is projected on the screen of a personal computer (not shown) with the LAN cable 54, and the length, diameter or angle of each part of the threaded metal container 52 is calculated and measured using the two-dimensional coordinate data of the projection image. Was value.
[0003]
[Problems to be solved by the invention]
However, in such a conventional measuring method, as shown in FIG. 9, the height of the thread of the container mouth portion 52a of the projected image of the threaded metal container 52 projected on the personal computer screen, the outer diameter of the screw. Etc., the projection image is calculated by using two-dimensional coordinate data to obtain the value. For example, as shown in FIG. 9, for the outer diameter D and valley diameter d of the thread, the reference ends on both sides are designated, the distances D and d between the reference ends are measured, and (D−d) / The value of the thread height was obtained by a simple calculation of 2, but this is only an average value, so there is an error, and there is a drawback that it is not possible to obtain the thread height value of a specific part. It was. In addition, the operation of matching the central axis of the container mouth portion 52a with the central axis of the measurement is troublesome, and there is a drawback that it requires labor, and there is a problem that the overall measurement accuracy and efficiency are poor.
[0004]
The present invention has been made paying attention to such a conventional problem, and it is an object of the present invention to provide an object shape measuring method and apparatus having good measurement accuracy and measurement efficiency by providing an auxiliary jig in the projector. And
[0005]
In order to solve this problem, the means corresponding to the invention described in claim 1 transmits a projection image of the threaded metal container projected by the projector to a personal computer connected to the projector, and displays it on the screen of the personal computer. with projects the projected image Te, from the two-dimensional coordinate data of the projected image, in the measurement method of the thread shape of a threaded metal container for calculating the height, etc. of the threads, the container mouth portion of the threaded metal container screw the section sides, contacting the right contact rod having a measurement reference hole parallel to the surface and the surface in contact with the screw portion side, and a reference edge of the measurement reference holes, measuring the height of the screw thread is a method of measuring thread shape of a threaded metal container, characterized by.
[0006]
Means corresponding to a second aspect of the invention, a centered fixing jig together with the contacting from above the container opening tip, the screw portion side of the left contact lever having a surface in contact with the threaded portion side of the container opening in by contacting, as a reference end surface that contacts the threaded portion surface of the left contact lever, thread diameter, thread shape of a threaded metal container and measuring the threaded skirt height or skirt angle This is a measurement method.
[0007]
Means corresponding to the third aspect of the present invention, while the centered fixture is contacted from above the container opening tip, measurement of the thread shape of a threaded metal cans and measuring the thread height Is the method.
[0008]
According to a fourth aspect of the present invention, there is provided a projector connected to a personal computer on a stationary platen, a holder for rotatably supporting a threaded metal container as a projection target of the projector, and the holder To measure a threaded metal container with a body supported on the body, an advancing / retracting center fixing jig for accurately fixing the threaded metal container in contact with the upper end of the mouth of the threaded metal container , and a threaded metal Provided with a left contact rod and a right contact rod which can be moved forward and backward as a reference end for measuring the height, length, diameter or angle of the screw thread in contact with the side surface of the mouth of the container , a measuring device of the thread shape of a threaded metal container, characterized in that a the surface and its plane parallel metrics hole in contact with the mouth portion side.
[0009]
Means corresponding to the fifth aspect of the present invention, before Kihidari contact rod and the right contact lever is on the rails of the lower block which is fixed to the stationary platen, to slide a respective on block integral a screw thread shape measuring apparatus of a threaded metal container, characterized in that it is fixed to the upper block.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 to 7 are views showing an object shape measuring method and apparatus according to the present invention. In the figure, reference numeral 1 denotes a projector fixed on a fixed platen 7, and the projector 1 projects a container mouth 3 a of a threaded metal container 3 that is an object to be projected. Specifically, the projection image of the container mouth 3a is projected on the screen of a connected personal computer (not shown) through the light receiving lens 1a of the projector 1, and measurement is performed using the two-dimensional coordinate data of the projection image. A value can be calculated.
[0011]
The container mouth 3a of the threaded metal container 3 as the projection object is held by the holder 5 and fixed on the stage glass 1b. As shown in FIG. 2, the holder 5 is configured to be able to rotate and advance / retreat by operating the handle 5a. The center fixing jig 9 comes into contact with the center of the tip of the container mouth portion 3a from above, and the left contact rod 6a of the left measurement reference jig 6 can freely move back and forth on the side surface of the container mouth portion 3a. In contact. As shown in FIG. 4, when this state is confirmed on the screen of the personal computer, the center fixing jig 9 comes into contact with the end face of the mouth at the center of the tip of the container mouth 3a, and the left contact rod 6a is brought into contact with the container mouth. It is in contact with the skirt portion 3b of the portion 3a. In this way, by restricting the container opening 3a by the center fixing jig 9 and the left contact rod 6a, the container opening 3a can be reliably set at the measurement position.
[0012]
And when measuring the outer diameter of the mouth part 3c of the container mouth part 3 as shown in FIG. 4, within the reference end frame A, by measuring both reference ends H, measure this distance. Thus, the value of the mouth 3c can be obtained. Further, when measuring the outer diameter of the screw portion 3d, by specifying both reference ends I in the reference end frame B, by measuring this distance, the value of the outer diameter of the screw portion 3d is obtained. Can do. Furthermore, when measuring the outer diameter of the skirt portion 3b, by specifying both reference ends J in the reference end frame C, the value of the outer diameter of the skirt portion 3b can be obtained similarly.
[0013]
Next, as shown in FIG. 5, when measuring the skirt height L and the skirt angle θ, as shown in FIG. 5, the measurement can be performed by designating each point. The skirt height L extends a straight line YZ connecting the point Y and the point Z, which is a linear part located below the skirt part 3b, and the extension line and the extension of the point J where the left contact rod 6a contacts the skirt part 3b. By specifying a point X (virtual point) that is an intersection with the line W and measuring the distance L from this point X to the tip of the mouth 3c, the value of the skirt height L can be obtained. As for the skirt angle θ, the value of the skirt angle θ can be obtained by measuring the angle θ formed by the extension line of the straight line YZ connecting the point Y and the point Z and the horizontal line at the point X.
[0014]
Next, when measuring the height of the screw thread using the right contact rod 8a of the right measurement reference jig 8, as shown in FIG. 7, the tip of the right contact rod 8a is connected to the side surface of the container mouth portion 3a. The exact thread height value can be obtained. As shown in FIG. 7, the center axis of the container mouth 3a can be made to coincide with the center of measurement by the center fixing jig 9 coming into contact with the center of the tip of the container mouth 3a from above. . A reference hole 8b is formed at the tip of the right contact rod 8a in parallel with the central axis of the container mouth 3a. In the reference frame D, the longest reference is made from the reference end S of the reference hole 8b. By designating the end I and the minimum reference end K, the difference in distance between I and K can be calculated to obtain the value of the thread height. In this way, the container mouth 3a can be rotated to accurately measure the height of the thread at a specific part.
[0015]
Next, the measuring apparatus according to the present invention will be described. A projector 1 is fixed on the fixed platen 7, and this projector 1 is integrated with a personal computer (not shown) or connected by a LAN cable 2 or the like. At a portion facing the projector 1, a threaded metal container 3 that is an object to be projected is held by a holder 5 and fixed on a stage glass 1b. The holder 5 is configured to be rotatable by a bearing, and slides on the rail 4 so as to freely advance and retract. On both sides of the holder 5, a left measurement reference jig 6 and a right measurement reference jig 8 having a left contact rod 6a and a right contact rod 8a that are in contact with the side surface of the container mouth portion 3a of the threaded metal container 3 are provided. Yes. The left measurement reference jig 6 and the right measurement reference jig 8 are composed of upper blocks 11, 12 and lower blocks 10, 13, and the upper blocks 11, 12 having left and right contact rods 6a, 8a are shown in FIG. As shown in FIG. 5, the left and right contact rods 6a, 8a can be freely contacted or separated by sliding on the rails of the lower blocks 10, 13 fixed on the fixed platen 7 so as to be able to advance and retreat. it can.
[0016]
【The invention's effect】
As described above, according to the present invention, the measurement method in which the auxiliary jig is provided in the projector has the effect that the measurement accuracy and the measurement efficiency can be remarkably improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an object shape measuring apparatus according to the present invention.
FIG. 2 is a right side view showing an object shape measuring apparatus according to the present invention.
FIG. 3 is a plan view showing a left measurement reference jig of the measuring apparatus according to the present invention.
FIG. 4 is a view showing a state in which the container mouth is measured using the center fixing jig and the left measurement reference jig of the measuring apparatus according to the present invention.
FIG. 5 is a drawing showing a state in which the container mouth is being measured using the center fixing jig and the left measurement reference jig of the measuring apparatus according to the present invention.
FIG. 6 is a plan view showing a right measurement reference jig of the measuring apparatus according to the present invention.
FIG. 7 is a view showing a state in which the container mouth is measured using the center fixing jig and the right measurement reference jig of the measuring apparatus according to the present invention.
FIG. 8 is a front view showing a state in which a container mouth is being measured using a conventional projector.
FIG. 9 is a drawing showing a state in which a container mouth is being measured using a conventional measuring apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Projector 3a Container mouth part 5 Holder 6 Left measurement reference jig 6a Left contact rod 7 Fixing plate 8 Right measurement reference jig 8a Right contact rod 9 Center fixing jig 10 13 Lower block 11 12 Upper block

Claims (5)

投影機により投影されたねじ付き金属容器の投影画像を、該投影機に連結したパソコンに送信し、パソコンの画面上にて前記投影画像を写し出すと共に、投影画像の２次元座標データから、ねじ山の高さ等を演算するねじ付き金属容器のねじ山形状の測定方法において、
前記ねじ付き金属容器の容器口部のねじ部側面に、そのねじ部側面と接触する面およびその面と平行の測定基準孔とを備えた右接触杆を接触させ、前記測定基準孔を基準端として、ねじ山の高さを測定することを特徴とするねじ付き金属容器のねじ山形状の測定方法。The projected image of the threaded metal container projected by the projector is transmitted to a personal computer connected to the projector, and the projected image is displayed on the screen of the personal computer. From the two-dimensional coordinate data of the projected image, the screw thread in the method of measuring the thread shape of a threaded metal container for calculating the height, etc.,
The threaded portion side of the container mouth portion of the threaded metal container, contacting the right contact rod having a measurement reference hole parallel to the surface and the surface in contact with the screw portion side, the reference end of the measurement reference hole as a method of measuring the thread shape of a threaded metal container and measuring the height of the thread. 中心固定治具を容器口部先端に上方から接触させると共に、容器口部のねじ部側面と接触する面を備えた左接触杆をねじ部側面に接触させることにより、左接触杆のねじ部側面と接触する面を基準端として、ねじ外径、ねじスカート高さ又はスカート角を測定することを特徴とする請求項１記載のねじ付き金属容器のねじ山形状の測定方法。The centered fixture with contacting from above the container opening tip, by contacting the left contact lever having a surface in contact with the threaded portion side of the container opening in the threaded portion side, the screw portion of the left contact lever as reference edge of the surface in contact with the side surface, thread diameter, thread skirt height or measurement method of the thread shape of the threaded metal container according to claim 1, wherein the measuring the skirt angle. 中心固定治具を容器口部先端に上方から接触させながらねじ山高さを測定することを特徴とする請求項１記載のねじ付き金属缶のねじ山形状の測定方法。Measurement method of thread shape of the threaded metal can according to claim 1, wherein the measuring the thread height while the centered fixture is contacted from above the container opening tip. 固定盤上に、パソコンと連結された投影機と、該投影機の被投影体であるねじ付き金属容器を回転自在に支持するホルダーと、該ホルダーに胴部が支持されたねじ付き金属容器を測定するために、ねじ付き金属容器の口部上端と接触してねじ付き金属容器を正確に固定する進退自在の中心固定治具と、ねじ付き金属容器の口部側面に接触して、ねじ山の高さ、長さ、直径又は角度を測定するための基準端となる進退自在の左接触杆および右接触杆とを設け、前記右接触杆に口部側面と接触する面およびその面と平行の測定基準孔とを設けたことを特徴とするねじ付き金属容器のねじ山形状の測定装置。A fixed platen, a projector connected to a computer, and the holder a threaded metal container for rotatably supporting a projection target of the projection apparatus, a threaded metallic container body portion is supported on the holder to measure the advance and retreat of the central fixture to precisely fix the threaded metal container in contact with the mouth portion upper end of the threaded metal casing, in contact with the mouth portion side of the threaded metal casing, the thread A left contact rod and a right contact rod that can be moved forward and backward are used as reference ends for measuring the height, length, diameter, or angle of the right contact rod , and the right contact rod is in contact with the side surface of the mouth and parallel to the surface. metrics hole and measuring device of the thread shape of a threaded metal container, characterized in that a. 前記左接触杆及び右接触杆は、固定盤上に固設された下ブロックのレール上を、各々上ブロックと一体となってスライドするように、上ブロックに固設されていることを特徴とする請求項４記載のねじ付き金属容器のねじ山形状の測定装置。Before Kihidari contact rod and the right contact lever is on the rails of the lower block which is fixed to the stationary platen, to slide a respective on block integral, characterized in that it is fixed to the upper block apparatus for measuring the thread shape of the threaded metal container according to claim 4,.
JP2001305065A 2001-10-01 2001-10-01 Method and apparatus for measuring thread shape of threaded metal container Expired - Fee Related JP3937076B2 (en)

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CN102384729A (en) * 2011-08-08 2012-03-21 合肥威尔燃油***有限责任公司 Method and device for detecting perpendicularity of screw thread
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