JP5741601B2 - Manufacturing method of screw fastening parts - Google Patents

Manufacturing method of screw fastening parts Download PDF

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Publication number
JP5741601B2
JP5741601B2 JP2013013514A JP2013013514A JP5741601B2 JP 5741601 B2 JP5741601 B2 JP 5741601B2 JP 2013013514 A JP2013013514 A JP 2013013514A JP 2013013514 A JP2013013514 A JP 2013013514A JP 5741601 B2 JP5741601 B2 JP 5741601B2
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Prior art keywords
radial direction
jig
screw
male screw
seating surface
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JP2014144497A (en
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以千弘 加藤
以千弘 加藤
山口　健二
健二 山口
近藤　淳
淳 近藤
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Denso Corp
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Denso Corp
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Priority to DE102014100383.7A priority patent/DE102014100383B4/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/32—Thread cutting; Automatic machines specially designed therefor by milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

本発明は、ねじを螺合させて締結する部品の製造方法に関するものである。   The present invention relates to a method of manufacturing a component that is screwed and fastened.

内燃機関に燃料を噴射するインジェクタとして、燃料の圧力を検出するセンサ装置を一体化したものが提案されている（例えば、特許文献１参照）。具体的には、センサハウジングにおねじを形成し、インジェクタボデーにめねじを形成し、それらのねじを螺合させてセンサ装置をインジェクタボデーに締結するようにしている。   As an injector that injects fuel into an internal combustion engine, an injector integrated with a sensor device that detects fuel pressure has been proposed (see, for example, Patent Document 1). Specifically, a screw is formed in the sensor housing, a female screw is formed in the injector body, and these screws are screwed together to fasten the sensor device to the injector body.

特開２０１２−２１５５０７号公報JP 2012-215507 A

しかしながら、ねじを螺合させて２部品を締結する場合、締結後のインジェクタボデーに対するセンサハウジングの回転方向止まり位置は特定の位置に定まらない。   However, when the two parts are fastened by screwing the screws, the position where the sensor housing stops in the rotational direction with respect to the injector body after fastening is not fixed at a specific position.

本発明は上記点に鑑みて、ねじを螺合させて２部品を締結したときに、一方の部品の特定の部位を他方の部品の特定の方向に位置させるようにすることを目的とする。   In view of the above points, an object of the present invention is to position a specific part of one part in a specific direction of the other part when the two parts are fastened by screwing.

上記目的を達成するため、請求項１に記載の発明では、めねじ（１１）および第１着座面（１２）を第１部材（１）に形成する第１加工工程と、めねじに螺合されるおねじ（２１１）および第１着座面に当接する第２着座面（２１２）を第２部材（２１Ａ）に形成するとともに第２部材に第３部材（２１Ｂ、２３）を接合する第２加工工程とを備える、ねじ締結部品の製造方法であって、めねじの径方向のうち、予め定めた特定の方向をめねじ基準径方向とし、おねじの径方向のうち、第２着座面からおねじ軸線方向に第２所定距離離れ且つおねじの山または谷が位置する部位を通る方向をおねじ基準径方向としたとき、第１加工工程は、めねじを加工する加工機（５）に第１部材をセットし、めねじの下孔（１１ａ）および第１着座面を加工する下孔加工工程と、第１着座面のめねじ軸線方向の位置を計測する第１着座面位置計測工程と、第１着座面からめねじ軸線方向に第２所定距離離れ且つめねじ基準径方向にめねじの谷または山が位置するようにめねじを加工するめねじ加工工程を備え、第２加工工程は、おねじを加工するおねじ加工工程と、おねじ基準径方向を決定するおねじ基準径方向決定工程と、おねじ基準径方向を基準にして第２部材に対する第３部材の位置決めを行って第２部材に第３部材を接合する接合工程とを備えることを特徴とする。   In order to achieve the above object, according to the first aspect of the present invention, the first machining step for forming the female screw (11) and the first seating surface (12) on the first member (1), and the female screw are screwed together. The second member (21A) is formed on the second member (21A), and the second member (21B, 23) is joined to the second member. A method for manufacturing a screw fastening component, comprising a machining step, wherein a predetermined specific direction of a female screw radial direction is a female screw reference radial direction, and a second seating surface of the male screw radial direction is a second seating surface The first processing step is a processing machine for processing a female thread (5) when a direction passing through a part where a male thread crest or trough is located at a second predetermined distance in the male screw axial direction is the male screw reference radial direction. ), Set the first member and add the pilot hole (11a) and the first seating surface. A pilot hole machining step, a first seating surface position measuring step for measuring a position of the first seating surface in the female screw axial direction, a second predetermined distance away from the first seating surface in the female screw axial direction, and a female screw reference radial direction It has a female thread machining process for machining a female thread so that a valley or a thread of a female thread is located. The second machining process is a male thread machining process for machining a male thread and a male thread for determining a male screw reference radial direction. It comprises a reference radial direction determining step and a joining step of positioning the third member relative to the second member with respect to the male screw reference radial direction to join the third member to the second member.

これによると、ねじを螺合させて第１部材第と２部材を締結したときに、第２部材および第３部材の特定の部位を、第１部材の特定の方向に位置させることができる。   According to this, when the screws are screwed together and the first member second and the second member are fastened, specific portions of the second member and the third member can be positioned in a specific direction of the first member.

なお、この欄および特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

本発明の第１実施形態に係る方法を適用したインジェクタの要部を示す図である。It is a figure which shows the principal part of the injector to which the method which concerns on 1st Embodiment of this invention is applied. 図１のＡ矢視図である。It is A arrow directional view of FIG. 図１のセンサ装置を示す図である。It is a figure which shows the sensor apparatus of FIG. 図１のインジェクタボデーにおける下孔加工工程の説明に供する図である。It is a figure with which it uses for description of the pilot hole manufacturing process in the injector body of FIG. 図１のインジェクタボデーにおける第１着座面位置計測工程の説明に供する図である。It is a figure where it uses for description of the 1st seating surface position measurement process in the injector body of FIG. 図１のインジェクタボデーにおけるめねじ加工工程の説明に供する図である。It is a figure where it uses for description of the internal thread machining process in the injector body of FIG. 図１のセンサ装置の加工に用いる治具を示す断面図である。It is sectional drawing which shows the jig | tool used for a process of the sensor apparatus of FIG. 図１のセンサ装置におけるおねじ基準径方向決定工程の説明に供する断面図である。It is sectional drawing with which it uses for description of the external thread reference | standard radial direction determination process in the sensor apparatus of FIG. 図８のＢ矢視図である。It is a B arrow view of FIG. 本発明の第２実施形態に係る方法の説明に供する図である。It is a figure where it uses for description of the method which concerns on 2nd Embodiment of this invention. 図１０のＣ矢視図である。It is C arrow line view of FIG. 本発明の第２実施形態の変形例の説明に供する図である。It is a figure where it uses for description of the modification of 2nd Embodiment of this invention. 本発明の第３実施形態に係る方法の説明に供する図である。It is a figure where it uses for description of the method which concerns on 3rd Embodiment of this invention. 図１２のＤ矢視図である。It is D arrow line view of FIG.

以下、本発明の実施形態について図に基づいて説明する。なお、以下の各実施形態相互において、互いに同一もしくは均等である部分には、図中、同一符号を付してある。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

（第１実施形態）
本発明の第１実施形態について説明する。 (First embodiment)
A first embodiment of the present invention will be described.

図１〜３に示すように、インジェクタは、コモンレール（図示せず）から供給される高圧燃料を図示しないノズルからディーゼル内燃機関の気筒内に噴射するものであり、第１部材としての金属製のインジェクタボデー１に、高圧燃料の圧力を検出するセンサ装置２が螺合されている。   As shown in FIGS. 1 to 3, the injector injects high-pressure fuel supplied from a common rail (not shown) into a cylinder of a diesel internal combustion engine from a nozzle (not shown), and is made of metal as a first member. A sensor device 2 that detects the pressure of the high-pressure fuel is screwed to the injector body 1.

インジェクタボデー１には、センサ装置２が螺合されるめねじ１１が形成されている。インジェクタボデー１におけるめねじ１１が形成された穴の底部には、センサ装置２の端部が当接する第１着座面１２が形成されている。第１着座面１２は、めねじ１１の軸線（以下、めねじ軸線という）に対して垂直な平面になっている。   The injector body 1 is formed with a female screw 11 into which the sensor device 2 is screwed. A first seating surface 12 with which the end of the sensor device 2 abuts is formed at the bottom of the hole in which the female thread 11 is formed in the injector body 1. The first seating surface 12 is a plane perpendicular to the axis of the female screw 11 (hereinafter referred to as the female screw axis).

また、インジェクタボデー１には、高圧燃料が流通する高圧通路１３、および高圧通路１３から分岐した分岐通路１４が形成されている。   The injector body 1 is formed with a high-pressure passage 13 through which high-pressure fuel flows and a branch passage 14 branched from the high-pressure passage 13.

センサ装置２のハウジング２１は、金属製の円筒状のステム部２１Ａと金属製の円盤状の鍔部２１Ｂとからなり、ステム部２１Ａと鍔部２１Ｂは溶接されて一体化されている。   The housing 21 of the sensor device 2 includes a metal cylindrical stem portion 21A and a metal disc-shaped flange portion 21B, and the stem portion 21A and the flange portion 21B are welded and integrated.

ステム部２１Ａの外周面には、インジェクタボデー１のめねじ１１に螺合するためのおねじ２１１が形成されている。   A male screw 211 is formed on the outer peripheral surface of the stem portion 21 </ b> A so as to be screwed into the female screw 11 of the injector body 1.

ステム部２１Ａにおけるおねじ２１１の軸線（以下、おねじ軸線という）方向の端部には、インジェクタボデー１の第１着座面１２に当接する第２着座面２１２が形成されている。第２着座面２１２は、おねじ軸線に対して垂直な平面になっている。   A second seating surface 212 that abuts on the first seating surface 12 of the injector body 1 is formed at the end of the stem portion 21A in the direction of the axis of the male screw 211 (hereinafter referred to as the male screw axis). The second seating surface 212 is a plane perpendicular to the male screw axis.

ステム部２１Ａにおけるおねじ軸線方向の端部（第２着座面２１２と反対側の端部）には、分岐通路１４を介して導かれる燃料の圧力に応じて変形する薄肉部２１３が形成されている。この薄肉部２１３には、薄肉部２１３の変形に応じて（換言すると、高圧通路１３の燃料圧力に応じて）抵抗値が変化するセンサチップ２２が貼付されている。   A thin-walled portion 213 that is deformed according to the pressure of the fuel guided through the branch passage 14 is formed at the end of the stem portion 21A in the male screw axial direction (the end opposite to the second seating surface 212). Yes. A sensor chip 22 whose resistance value changes according to the deformation of the thin portion 213 (in other words, according to the fuel pressure in the high pressure passage 13) is attached to the thin portion 213.

鍔部２１Ｂの外周側面には、組み付け時にセンサ装置２を回転させる治具（図示せず）が係合する係合部２１４が形成されている。   An engaging portion 214 is formed on the outer peripheral side surface of the flange portion 21B. The engaging portion 214 engages with a jig (not shown) that rotates the sensor device 2 during assembly.

鍔部２１Ｂにおけるおねじ軸線方向の端部には、薄肉部２１３およびセンサチップ２２を囲むようにして、モールドＩＣ２３が配置されている。このモールドＩＣ２３は、鍔部２１Ｂに接着剤にて接合されている。   A mold IC 23 is disposed at the end of the flange portion 21B in the male screw axial direction so as to surround the thin portion 213 and the sensor chip 22. The mold IC 23 is joined to the flange portion 21B with an adhesive.

モールドＩＣ２３は、センサチップ２２の抵抗値変化に基づいて圧力に応じた電気信号を出力する信号処理回路用ＩＣ（図示せず）、および信号処理回路用ＩＣと電気的に接続されたリードフレーム２３１等を備えている。   The mold IC 23 is a signal processing circuit IC (not shown) that outputs an electrical signal corresponding to pressure based on a change in the resistance value of the sensor chip 22, and a lead frame 231 that is electrically connected to the signal processing circuit IC. Etc.

信号処理回路用ＩＣおよびリードフレーム２３１は、電気絶縁性に富む樹脂よりなるモールド樹脂層２３２にて封止されている。そして、リードフレーム２３１の一部であるセンサターミナル２３３が、モールド樹脂層２３２の外周側面から突出している。   The signal processing circuit IC and the lead frame 231 are sealed with a mold resin layer 232 made of a resin having high electrical insulation. A sensor terminal 233 which is a part of the lead frame 231 protrudes from the outer peripheral side surface of the mold resin layer 232.

モールドＩＣ２３における反ハウジング側には、センサチップ２２が配置された空間を覆う金属板よりなるカバー２４が配置されている。カバー２４は、モールドＩＣ２３に接着剤にて接合されている。   A cover 24 made of a metal plate that covers the space in which the sensor chip 22 is disposed is disposed on the opposite side of the mold IC 23 from the housing. The cover 24 is joined to the mold IC 23 with an adhesive.

そして、インジェクタボデー１にセンサ装置２を螺合したときに、センサ装置２の特定の部位が、インジェクタボデー１の特定の方向に位置するようになっている。具体的には、インジェクタボデー１にセンサ装置２を螺合したときに、センサ装置２のセンサターミナル２３３が、めねじ軸線およびおねじ軸線の位置を基準にして、インジェクタボデー１におけるノズル装着側（すなわち、図１の紙面左側）に、位置するようになっている。   When the sensor device 2 is screwed onto the injector body 1, a specific part of the sensor device 2 is positioned in a specific direction of the injector body 1. Specifically, when the sensor device 2 is screwed into the injector body 1, the sensor terminal 233 of the sensor device 2 is positioned on the nozzle mounting side (in the injector body 1) with reference to the positions of the female screw axis and the male screw axis ( That is, it is located on the left side of the drawing in FIG.

なお、めねじ１１の径方向のうち予め定めた特定の方向を、以下、めねじ基準径方向という。具体的には、めねじ基準径方向は、めねじ軸線の位置を基準にして、インジェクタボデー１におけるノズル装着側の方向である。   In addition, the predetermined specific direction among the radial directions of the female screw 11 is hereinafter referred to as a female screw reference radial direction. Specifically, the female screw reference radial direction is a direction on the nozzle mounting side of the injector body 1 with respect to the position of the female screw axis.

また、ステム部２１Ａは、本発明の第２部材に相当し、センサ装置２のうちステム部２１Ａを除く構成部品は、本発明の第３部材に相当する。因みに、鍔部２１ＢおよびモールドＩＣ２３が、第３部材の主要構成部品である。   Further, the stem portion 21A corresponds to the second member of the present invention, and the constituent parts excluding the stem portion 21A of the sensor device 2 correspond to the third member of the present invention. Incidentally, the flange part 21B and the mold IC 23 are main components of the third member.

次に、インジェクタボデー１におけるめねじ１１の加工方法について、図４〜６に基づいて説明する。   Next, the processing method of the internal thread 11 in the injector body 1 is demonstrated based on FIGS.

めねじ１１の加工を行う加工機５は、マシニングセンタであり、ワークとしてのインジェクタボデー１をセットする加工機台５１、刃具や測定器等を駆動する加工ヘッド５２、プログラムに基づいて加工ヘッド５２の作動を制御する制御部５３等を備えている。   The processing machine 5 for processing the internal thread 11 is a machining center, a processing machine base 51 for setting the injector body 1 as a work, a processing head 52 for driving a cutting tool or a measuring instrument, and the processing head 52 based on a program. A control unit 53 for controlling the operation is provided.

まず、図４に示すように、下孔加工工程では、インジェクタボデー１を加工機台５１にセットした後、加工ヘッド５２に装着したエンドミル５４にて、めねじ１１の下孔１１ａおよび第１着座面１２を加工する。   First, as shown in FIG. 4, in the prepared hole machining step, the injector body 1 is set on the machine table 51 and then the end mill 54 mounted on the machining head 52 is used to prepare the prepared holes 11 a and the first seats of the female screw 11. The surface 12 is processed.

このとき、加工機台５１におけるインジェクタボデー１がセットされた面からめねじ軸線方向（すなわち、図４の紙面上下方向）に第１所定距離Ｌ１離れた位置を第１着座面１２の目標加工位置Ｐ１（以下、第１着座面目標加工位置Ｐ１という）として、めねじ１１の下孔１１ａおよび第１着座面１２を加工する。なお、第１着座面目標加工位置Ｐ１は、制御部５３に予め記憶されている。   At this time, the target machining position P1 of the first seating surface 12 is a position separated from the surface of the processing machine base 51 on which the injector body 1 is set by the first predetermined distance L1 in the direction of the female screw axis (that is, the vertical direction in FIG. 4). The pilot hole 11a and the first seating surface 12 of the female screw 11 are machined as (hereinafter referred to as a first seating surface target machining position P1). The first seating surface target machining position P1 is stored in the control unit 53 in advance.

続いて、図５に示すように、第１着座面位置計測工程では、加工ヘッド５２に装着した測定器５５にて、第１着座面１２のめねじ軸線方向の実加工位置Ｐ２（以下、第１着座面実加工位置Ｐ２という）を計測する。   Subsequently, as shown in FIG. 5, in the first seating surface position measuring step, an actual machining position P2 (hereinafter referred to as a first machining position P2) of the first seating surface 12 in the direction of the female screw axis is measured by a measuring instrument 55 attached to the machining head 52. 1 seating surface actual machining position P2) is measured.

続いて、めねじ加工条件算出工程では、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れ且つめねじ基準径方向の部位にめねじ１１の谷が形成される加工条件を、制御部５３にて算出する。この加工条件の詳細な算出方法については後述する。なお、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れた位置は、めねじ１１が形成される領域内の任意の位置である。   Subsequently, in the female thread machining condition calculation step, a machining condition in which a valley of the female thread 11 is formed at a portion that is separated from the first seating surface 12 by the second predetermined distance L2 in the female thread axial direction and in the female thread reference radial direction is controlled. Calculated by the unit 53. A detailed calculation method of the machining conditions will be described later. Note that the position away from the first seating surface 12 in the direction of the female screw axis by the second predetermined distance L2 is an arbitrary position within the region where the female screw 11 is formed.

続いて、めねじ加工工程では、図６に示すように、めねじ加工条件算出工程で算出した加工条件に基づいてプラネットタップ５６にてめねじ１１を形成する。   Subsequently, in the internal thread machining step, as shown in FIG. 6, the internal thread 11 is formed by the planet tap 56 based on the machining conditions calculated in the internal thread machining condition calculation step.

具体的には、プラネットタップ５６は、めねじ軸線に沿って第１着座面１２に向かって所定位置まで移動（すなわち下降）した後、自転しつつめねじ基準径方向に移動し、下孔１１ａを囲む壁面に当接してめねじ１１の加工を開始する。さらに、プラネットタップ５６は、めねじ軸線を中心に公転しつつ第１着座面１２から遠ざかる向きに移動（すなわち上昇）して、下孔１１ａの開口位置までめねじ１１を形成する。   Specifically, the planet tap 56 moves to the predetermined position along the female screw axis toward the first seating surface 12 (that is, descends), then moves in the female screw reference radial direction while rotating, and the pilot hole 11a. The processing of the female screw 11 is started in contact with the wall surface surrounding. Further, the planet tap 56 revolves around the female screw axis and moves (that is, rises) away from the first seating surface 12 to form the female screw 11 up to the opening position of the lower hole 11a.

ここで、めねじ加工条件算出工程での加工条件の算出方法について説明する。   Here, a calculation method of the machining condition in the female thread machining condition calculation step will be described.

なお、めねじ１１の加工を開始するときのプラネットタップ５６の下端位置をタップ挿入深さとしたとき、以下の説明では、制御部５３に予め記憶されているタップ挿入深さの設定値を基準タップ挿入深さＰ３といい、実際に加工を行う際のタップ挿入深さの目標値を目標タップ挿入深さＰ４という。   When the lower end position of the planet tap 56 when starting the machining of the internal thread 11 is defined as the tap insertion depth, in the following description, the set value of the tap insertion depth stored in the control unit 53 in advance is used as the reference tap. It is called insertion depth P3, and the target value of tap insertion depth when actual machining is performed is called target tap insertion depth P4.

また、基準タップ挿入深さＰ３にて実際に加工を行った場合、第１着座面目標加工位置Ｐ１からめねじ軸線方向に第２所定距離Ｌ２離れ且つめねじ基準径方向の部位に、めねじ１１の谷が形成されるようになっている。   Further, when the machining is actually performed at the reference tap insertion depth P3, the female screw 11 is provided at the second predetermined distance L2 away from the first seating surface target machining position P1 in the female screw axial direction and in the female screw reference radial direction. A valley is formed.

最初に、第１着座面目標加工位置Ｐ１と第１着座面実加工位置Ｐ２との誤差ΔＬ１（以下、第１着座面加工位置誤差ΔＬ１という）を算出する。続いて、基準タップ挿入深さＰ３を補正して、換言すると、基準タップ挿入深さＰ３に第１着座面加工位置誤差ΔＬ１を加算または減算して、目標タップ挿入深さＰ４を算出する。この目標タップ挿入深さＰ４が、めねじ加工条件算出工程で算出する加工条件である。   First, an error ΔL1 (hereinafter, referred to as a first seating surface machining position error ΔL1) between the first seating surface target machining position P1 and the first seating surface actual machining position P2 is calculated. Subsequently, the reference tap insertion depth P3 is corrected, in other words, the target tap insertion depth P4 is calculated by adding or subtracting the first seating surface machining position error ΔL1 to the reference tap insertion depth P3. This target tap insertion depth P4 is a machining condition calculated in the female thread machining condition calculation step.

そして、このようにして算出した目標タップ挿入深さＰ４に基づいて前述しためねじ加工工程を実行することにより、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れ且つめねじ基準径方向の部位にめねじ１１の谷が形成される。   Then, by executing the screw machining step described above based on the target tap insertion depth P4 calculated in this way, the second predetermined distance L2 away from the first seating surface 12 in the female screw axial direction and the female screw reference diameter. A trough of the female screw 11 is formed at a site in the direction.

次に、センサ装置２単体の加工および組み付け方法について、図７〜図９に基づいて説明する。   Next, a method for processing and assembling the sensor device 2 alone will be described with reference to FIGS.

まず、図７に示す治具６を用意する。この治具６には、インジェクタボデー１のめねじ１１と径およびピッチが等しい治具めねじ６１、およびステム部２１Ａが螺合された際にステム部２１Ａの第２着座面２１２が当接する治具着座面６２が形成されている。   First, a jig 6 shown in FIG. 7 is prepared. The jig 6 has a jig female screw 61 having the same diameter and pitch as the female screw 11 of the injector body 1 and a jig in which the second seating surface 212 of the stem portion 21A comes into contact when the stem portion 21A is screwed. A seating surface 62 is formed.

また、治具めねじ６１の径方向のうち、治具着座面６２から治具めねじ軸線方向に第２所定距離Ｌ２離れ且つ治具めねじ６１の谷が位置する部位を通る方向を治具めねじ基準径方向としたとき、治具６１には、治具めねじ基準径方向を示す治具めねじ基準径方向マーク６３（図９参照）が付与されている。   Further, among the radial directions of the jig female screw 61, the direction passing through the part where the valley of the jig female screw 61 is located at the second predetermined distance L2 from the jig seating surface 62 in the jig female screw axial direction. When it is set as the female screw reference radial direction, the jig 61 is provided with a jig female screw reference radial direction mark 63 (see FIG. 9) indicating the jig female screw reference radial direction.

そして、ステム部２１Ａのおねじ２１１の径方向のうち、第２着座面２１２からおねじ軸線方向に第２所定距離Ｌ２離れ且つおねじ２１１の山が位置する部位を通る方向をおねじ基準径方向としたとき、次のおねじ基準径方向決定工程にて、治具６を利用しておねじ基準径方向を決定するとともに、おねじ基準径方向を示すマークをステム部２１Ａに付与する。   Then, among the radial directions of the male screw 211 of the stem portion 21A, a direction passing through a portion that is separated from the second seating surface 212 in the male screw axis direction by a second predetermined distance L2 and that has a thread ridge is located. When the direction is determined, the screw reference radial direction is determined using the jig 6 in the next male screw reference radial direction determination step, and a mark indicating the male screw reference radial direction is given to the stem portion 21A.

すなわち、おねじ基準径方向決定工程では、図８および図９に示すように、ステム部２１Ａ単体を治具６に組み付け、第２着座面２１２を治具着座面６２に当接させる。   That is, in the male screw reference radial direction determining step, as shown in FIGS. 8 and 9, the stem portion 21 </ b> A alone is assembled to the jig 6, and the second seating surface 212 is brought into contact with the jig seating surface 62.

このように、第２着座面２１２を治具着座面６２に当接させた状態では、治具着座面６２から治具めねじ軸線方向に第２所定距離Ｌ２離れ且つ治具めねじ基準径方向に位置する治具めねじ６１の谷と、第２着座面２１２からおねじ軸線方向に第２所定距離Ｌ２離れ且つおねじ基準径方向に位置するおねじ２１１の山が当接し、治具めねじ基準径方向とおねじ基準径方向が一致する。   As described above, in a state where the second seating surface 212 is in contact with the jig seating surface 62, the second predetermined distance L2 is separated from the jig seating surface 62 in the jig female screw axial direction and the jig female screw reference radial direction. The valley of the jig female screw 61 located at the position of the screw and the crest of the male screw 211 located in the male screw reference radial direction and a second predetermined distance L2 away from the second seating surface 212 in the male screw axial direction come into contact with each other. The screw reference radial direction matches the male screw reference radial direction.

そこで、ステム部２１Ａにおける治具めねじ基準径方向マーク６３と同じ方向の部位に、おねじ基準径方向を示すおねじ基準径方向マーク２１５をステム部２１Ａに付与して、おねじ基準径方向を明示する。具体的には、ステム部２１Ａの薄肉部２１３の表面のうち、後の工程で貼付されるセンサチップ２２の貼付予定領域の範囲外に、より詳細には、薄肉部２１３における外周部近傍に、おねじ基準径方向マーク２１５を付与する。   Therefore, a male screw reference radial direction mark 215 indicating the male screw reference radial direction is provided to the stem portion 21A at a portion in the same direction as the jig female screw reference radial direction mark 63 in the stem portion 21A, so that the male screw reference radial direction is obtained. Is specified. Specifically, out of the surface of the thin portion 213 of the stem portion 21A, outside the range of the pasted region of the sensor chip 22 to be pasted in a later step, more specifically, near the outer peripheral portion of the thin portion 213, The male screw reference radial direction mark 215 is provided.

この後、接合工程にて、ステム部２１Ａにセンサ装置２の他の構成部品を組み付ける。すなわち、接合工程では、まずステム部２１Ａを治具６から外し、ステム部２１Ａ以外のセンサ装置２の構成部品を、おねじ基準径方向マーク２１５を基準にして位置決めを行ってステム部２１Ａに接合する。具体的には、センサターミナル２３３が、おねじ軸線の位置を基準にしておねじ基準径方向マーク２１５側に位置するように位置決めして、センサ装置２の構成部品を接合する。   Thereafter, other components of the sensor device 2 are assembled to the stem portion 21A in the joining step. That is, in the joining process, the stem portion 21A is first removed from the jig 6, and the components of the sensor device 2 other than the stem portion 21A are positioned with reference to the male screw reference radial direction mark 215 and joined to the stem portion 21A. To do. Specifically, the sensor terminal 233 is positioned so as to be positioned on the screw reference radial direction mark 215 side with respect to the position of the male screw axis, and the components of the sensor device 2 are joined.

そして、上記のようにして製造したセンサ装置２をインジェクタボデー１に螺合させて締結した状態、換言すると、センサ装置２の第２着座面２１２をインジェクタボデー１の第１着座面１２に当接させた状態では、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れ且つめねじ基準径方向に位置するめねじ１１の谷と、第２着座面２１２からおねじ軸線方向に第２所定距離Ｌ２離れ且つおねじ基準径方向に位置するおねじ２１１の山が当接し、めねじ基準径方向とおねじ基準径方向が一致する。   Then, the sensor device 2 manufactured as described above is screwed into the injector body 1 and fastened, in other words, the second seating surface 212 of the sensor device 2 is brought into contact with the first seating surface 12 of the injector body 1. In this state, the valley of the female screw 11 that is separated from the first seating surface 12 by the second predetermined distance L2 in the female screw axial direction and located in the female screw reference radial direction, and the second predetermined predetermined value from the second seating surface 212 in the male screw axial direction. The threads of the external thread 211 that are separated by the distance L2 and are located in the external thread reference radial direction come into contact with each other, so that the internal thread reference radial direction and the external thread reference radial direction coincide.

したがって、センサ装置２をインジェクタボデー１に螺合させて締結すると、センサ装置２のセンサターミナル２３３は、めねじ軸線およびおねじ軸線の位置を基準にして、インジェクタボデー１におけるノズル装着側に位置することになる。   Therefore, when the sensor device 2 is screwed and fastened to the injector body 1, the sensor terminal 233 of the sensor device 2 is positioned on the nozzle mounting side of the injector body 1 with reference to the positions of the female screw axis and the male screw axis. It will be.

なお、第１実施形態の接合工程では、ステム部２１Ａを治具６から外して、ステム部２１Ａ以外のセンサ装置２の構成部品をステム部２１Ａに接合したが、ステム部２１Ａを治具６に組み付けた状態で、ステム部２１Ａ以外のセンサ装置２の構成部品をステム部２１Ａに接合してもよい。   In the joining process of the first embodiment, the stem portion 21A is removed from the jig 6 and the components of the sensor device 2 other than the stem portion 21A are joined to the stem portion 21A. In the assembled state, components of the sensor device 2 other than the stem portion 21A may be joined to the stem portion 21A.

具体的には、治具めねじ基準径方向マーク６３を基準にして、ステム部２１Ａ以外のセンサ装置２の構成部品の位置決めを行って、ステム部２１Ａ以外のセンサ装置２の構成部品をステム部２１Ａに接合する。この場合には、おねじ基準径方向マーク２１５は不要である。   Specifically, the component parts of the sensor device 2 other than the stem portion 21A are positioned with reference to the jig female screw reference radial direction mark 63, and the component parts of the sensor device 2 other than the stem portion 21A are placed in the stem portion. Join to 21A. In this case, the male screw reference radial direction mark 215 is unnecessary.

また、第１実施形態では、おねじ２１１の径方向のうち、第２着座面２１２からおねじ軸線方向に第２所定距離Ｌ２離れ且つおねじ２１１の山が位置する部位を通る方向をおねじ基準径方向とし、また、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れた位置にめねじ１１の谷が位置するようにしたが、それらは次のように変更することができる。   Further, in the first embodiment, among the radial directions of the external thread 211, the external thread is in a direction passing through a portion that is separated from the second seating surface 212 in the external axis direction by a second predetermined distance L2 and where the thread 211 is located. The valley of the female screw 11 is positioned at the second radial distance L2 from the first seating surface 12 in the direction of the female screw axis in the reference radial direction, but these can be changed as follows. .

すなわち、おねじ２１１の径方向のうち、第２着座面２１２からおねじ軸線方向に第２所定距離Ｌ２離れ且つおねじ２１１の谷が位置する部位を通る方向をおねじ基準径方向とし、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れた位置にめねじ１１の山が位置するようにしてもよい。   That is, among the radial directions of the external thread 211, the direction passing through the portion where the trough of the external thread 211 is located at the second predetermined distance L2 from the second seating surface 212 in the external thread axial direction is defined as the external thread reference radial direction. The threads of the female screw 11 may be located at a position away from the first seating surface 12 by the second predetermined distance L2 in the female screw axial direction.

さらに、第１実施形態では、めねじ基準径方向を、めねじ軸線の位置を基準にしてインジェクタボデー１におけるノズル装着側の方向にしたが、めねじ基準径方向は、、めねじ軸線の位置を基準にしてインジェクタボデー１における反ノズル装着側（すなわち、図１の紙面右側）の方向にしてもよい。この場合、インジェクタボデー１にセンサ装置２を螺合したときに、センサ装置２のセンサターミナル２３３が、めねじ軸線およびおねじ軸線の位置を基準にして、インジェクタボデー１における反ノズル装着側に位置することになる。   Further, in the first embodiment, the female screw reference radial direction is set to the nozzle mounting side direction in the injector body 1 with respect to the position of the female screw axis, but the female screw reference radial direction is the position of the female screw axis. May be the direction of the non-nozzle mounting side of the injector body 1 (that is, the right side in FIG. 1). In this case, when the sensor device 2 is screwed onto the injector body 1, the sensor terminal 233 of the sensor device 2 is positioned on the side opposite to the nozzle mounting on the injector body 1 with reference to the positions of the female screw axis and the male screw axis. Will do.

さらにまた、第１実施形態では、加工機台５１にインジェクタボデー１を載せてめねじ１１の加工を行うようにしたが、インジェクタボデー１における円筒部をチャックにて保持してめねじ１１の加工を行うようにしてもよい。この場合、チャックの中心位置（すなわち、インジェクタボデー１の中心位置）からめねじ軸線方向に第１所定距離Ｌ１離れた位置を第１着座面目標加工位置Ｐ１とする。   Furthermore, in the first embodiment, the injector body 1 is mounted on the processing machine base 51 and the internal thread 11 is processed. However, the cylindrical portion of the injector body 1 is held by the chuck and the internal thread 11 is processed. May be performed. In this case, a position that is a first predetermined distance L1 away from the center position of the chuck (that is, the center position of the injector body 1) in the female screw axial direction is defined as a first seating surface target processing position P1.

（第２実施形態）
本発明の第２実施形態について説明する。本実施形態は、おねじ基準径方向決定工程を変更したものであり、より詳細には、治具６の代わりに視覚装置を用いて、おねじ基準径方向を決定するようにしたものである。その他に関しては第１実施形態と同様であるため、異なる部分についてのみ説明する。 (Second Embodiment)
A second embodiment of the present invention will be described. In the present embodiment, the male screw reference radial direction determination step is changed, and more specifically, the male screw reference radial direction is determined using a visual device instead of the jig 6. . Since other aspects are the same as those in the first embodiment, only different parts will be described.

図１０に示すように、視覚装置７は、ワークとしてのステム部２１Ａをセットする計測台７１、ステム部２１Ａのおねじ２１１を撮影するカメラ７２、おねじ軸線周りに移動可能で、ステム部２１Ａにおねじ基準径方向マーク２１５を付与するマーカー７３、および、カメラ７２で撮影した画像を解析しておねじ基準径方向を求め、マーカー７３の作動を制御する制御部７４等を備えている。   As shown in FIG. 10, the visual device 7 includes a measuring table 71 for setting a stem portion 21A as a workpiece, a camera 72 for photographing a male screw 211 of the stem portion 21A, and a movable portion around a male screw axis. A marker 73 for providing the screw reference radial direction mark 215 and a control unit 74 for analyzing the image taken by the camera 72 to obtain the screw reference radial direction and controlling the operation of the marker 73 are provided.

上記構成において、まず、ステム部２１Ａの第２着座面２１２が計測台７１の上面に当接するようにしてステム部２１Ａを計測台７１にセットした後、ステム部２１Ａのおねじ２１１をカメラ７２にて撮影する。   In the above configuration, first, the stem portion 21A is set on the measurement table 71 such that the second seating surface 212 of the stem portion 21A contacts the upper surface of the measurement table 71, and then the male screw 211 of the stem portion 21A is attached to the camera 72. To shoot.

そして、制御部７４は、カメラ７２にて撮影した画像を解析して、カメラ７２の正面に位置するおねじ２１１の山のうち、第２着座面２１２から第２所定距離Ｌ２離れた付近に位置するおねじ２１１の山を特定し、その特定したおねじ２１１の山から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定し、この測定して得られた距離Ｌ３と第２所定距離Ｌ２との誤差ΔＬ２を算出する。   Then, the control unit 74 analyzes the image photographed by the camera 72 and is located in the vicinity of the second predetermined distance L2 from the second seating surface 212 in the crest of the external thread 211 located in front of the camera 72. The crest of the male screw 211 to be identified is specified, the distance L3 in the male screw axis direction from the specified crest of the male screw 211 to the second seating surface 212 is measured, and the distance L3 obtained by this measurement and the second predetermined distance are measured. An error ΔL2 with respect to the distance L2 is calculated.

さらに、制御部７４は、ステム部２１Ａにおけるカメラ７２の正面に位置する部位とおねじ基準径方向との角度のずれ量θ１を算出する。ここで、１条ねじの場合は、おねじ２１１のピッチをＰ１とすると、θ１＝ΔＬ２／Ｐ１×３６０°である。   Further, the control unit 74 calculates a shift amount θ1 of an angle between a portion of the stem portion 21A located in front of the camera 72 and the male screw reference radial direction. Here, in the case of a single thread, assuming that the pitch of the external thread 211 is P1, θ1 = ΔL2 / P1 × 360 °.

続いて、制御部７４は、マーカー７３をステム部２１Ａにおけるカメラ７２の正面に位置する部位からずれ量θ１分移動させた後、すなわち、マーカー７３をステム部２１Ａにおけるおねじ基準径方向の位置に移動させた後、マーカー７３にてステム部２１Ａにおねじ基準径方向マーク２１５を付与する。   Subsequently, the control unit 74 moves the marker 73 from the portion of the stem portion 21A located in front of the camera 72 by a shift amount θ1, that is, the marker 73 is moved to the position of the stem portion 21A in the male screw reference radial direction. After the movement, the screw reference radial direction mark 215 is given to the stem portion 21 </ b> A by the marker 73.

ところで、おねじ２１１の有効径とめねじ１１の有効径との差が大きくなるほど、実際のおねじ基準径方向の誤差が大きくなる。そこで、第２実施形態では、誤差ΔＬ２に基づいてずれ量θ１を算出したが、画像解析によりおねじ２１１の有効径を測定し、この測定して得られたおねじ２１１の有効径とめねじ１１の有効径との差に基づいてずれ量θ１を補正してもよい。なお、この場合、めねじ１１の有効径は、例えば設計上の値を用いることができる。   By the way, the larger the difference between the effective diameter of the external thread 211 and the effective diameter of the female thread 11, the greater the error in the actual thread reference radial direction. Therefore, in the second embodiment, the shift amount θ1 is calculated based on the error ΔL2, but the effective diameter of the external thread 211 is measured by image analysis, and the effective diameter of the external thread 211 and the internal thread 11 obtained by this measurement are measured. The shift amount θ1 may be corrected based on the difference from the effective diameter. In this case, for example, a design value can be used as the effective diameter of the female screw 11.

また、第２実施形態では、おねじ２１１の山から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定したが、おねじ２１１の谷から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定するようにしてもよい。この場合には、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れた位置にめねじ１１の山を位置させる。   In the second embodiment, the distance L3 in the male screw axis direction from the crest of the male screw 211 to the second seating surface 212 is measured, but the male screw axis direction from the trough of the male screw 211 to the second seating surface 212 is measured. The distance L3 may be measured. In this case, the thread of the female screw 11 is positioned at a position away from the first seating surface 12 in the female screw axial direction by a second predetermined distance L2.

さらに、第２実施形態では、ステム部２１Ａの第２着座面２１２が計測台７１の上面に当接するようにしてステム部２１Ａを計測台７１にセットし、第２着座面２１２を距離Ｌ２、Ｌ３の基準にしたが、図１２に示す変形例のように、ステム部２１Ａにおける鍔部２１Ｂが溶接される接合面２１６が計測台７１の上面に当接するようにしてステム部２１Ａを計測台７１にセットし、接合面２１６を距離Ｌ２、Ｌ３の基準にしてもよい。   Furthermore, in the second embodiment, the stem portion 21A is set on the measurement table 71 such that the second seating surface 212 of the stem portion 21A contacts the upper surface of the measurement table 71, and the second seating surface 212 is set at the distances L2, L3. However, as in the modification shown in FIG. 12, the stem portion 21 </ b> A is attached to the measurement table 71 such that the joint surface 216 to which the flange portion 21 </ b> B of the stem portion 21 </ b> A is welded contacts the upper surface of the measurement table 71. The joint surface 216 may be set as a reference for the distances L2 and L3.

（第３実施形態）
本発明の第３実施形態について説明する。本実施形態は、おねじ基準径方向決定工程を変更したものであり、より詳細には、治具６の代わりに視覚装置を用いて、おねじ基準径方向を決定するようにしたものである。その他に関しては第１実施形態と同様であるため、異なる部分についてのみ説明する。 (Third embodiment)
A third embodiment of the present invention will be described. In the present embodiment, the male screw reference radial direction determination step is changed, and more specifically, the male screw reference radial direction is determined using a visual device instead of the jig 6. . Since other aspects are the same as those in the first embodiment, only different parts will be described.

図１３に示すように、視覚装置８は、ワークとしてのステム部２１Ａをセットする計測台８１、この計測台８１を回転させる回転機構８２、ステム部２１Ａのおねじ２１１を撮影するカメラ８３、ステム部２１Ａにおねじ基準径方向マーク２１５を付与するマーカー８４、および、回転機構８２とマーカー８４の作動を制御するとともに、カメラ８３で撮影した画像を解析しておねじ基準径方向を求める制御部８５等を備えている。   As shown in FIG. 13, the visual device 8 includes a measuring table 81 for setting a stem portion 21A as a work, a rotating mechanism 82 for rotating the measuring table 81, a camera 83 for photographing a male screw 211 of the stem portion 21A, and a stem. The marker 84 for giving the screw reference radial direction mark 215 to the part 21A, and the control unit for controlling the operation of the rotating mechanism 82 and the marker 84 and analyzing the image taken by the camera 83 to obtain the screw reference radial direction 85 etc.

上記構成において、まず、ステム部２１Ａの第２着座面２１２が計測台８１の上面に当接するようにしてステム部２１Ａを計測台８１にセットした後、ステム部２１Ａのおねじ２１１をカメラ８３にて撮影する。   In the above configuration, first, the stem portion 21A is set on the measurement table 81 so that the second seating surface 212 of the stem portion 21A contacts the upper surface of the measurement table 81, and then the male screw 211 of the stem portion 21A is attached to the camera 83. To shoot.

そして、制御部８５は、カメラ８３にて撮影した画像を解析して、カメラ８３の正面に位置するおねじ２１１の山のうち、第２着座面２１２から第２所定距離Ｌ２離れた付近に位置するおねじ２１１の山を特定し、その特定したおねじ２１１の山から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定し、この測定して得られた距離Ｌ３が第２所定距離Ｌ２と等しいか否かを判定する。   Then, the control unit 85 analyzes the image photographed by the camera 83 and is located in the vicinity of the second predetermined distance L2 from the second seating surface 212 in the crest of the male screw 211 located in front of the camera 83. The crest of the male screw 211 to be identified is specified, the distance L3 in the male screw axis direction from the specified crest of the male screw 211 to the second seating surface 212 is measured, and the distance L3 obtained by this measurement is a second predetermined value. It is determined whether or not it is equal to the distance L2.

距離Ｌ３が第２所定距離Ｌ２と等しくない場合は、回転機構８２により計測台８１を所定角度回転させ、距離Ｌ３を再度測定し、測定し直した距離Ｌ３が第２所定距離Ｌ２と等しいか否かを判定する。   When the distance L3 is not equal to the second predetermined distance L2, the measuring base 81 is rotated by a predetermined angle by the rotation mechanism 82, the distance L3 is measured again, and whether the measured distance L3 is equal to the second predetermined distance L2 or not. Determine whether.

そして、距離Ｌ３が第２所定距離Ｌ２と等しくなったときにカメラ８３の正面に位置する側がおねじ基準径方向であるため、距離Ｌ３が第２所定距離Ｌ２と等しくなったときに、マーカー８４にてステム部２１Ａにおねじ基準径方向マーク２１５を付与する。   When the distance L3 is equal to the second predetermined distance L2, the side located in front of the camera 83 is the male screw reference radial direction, and therefore when the distance L3 is equal to the second predetermined distance L2, the marker 84 is used. The screw reference radial direction mark 215 is given to the stem portion 21A.

前述したように、おねじ２１１の有効径とめねじ１１の有効径との差が大きくなるほど、実際のおねじ基準径方向の誤差が大きくなる。そこで、画像解析によりおねじ２１１の有効径を測定し、この測定して得られたおねじ２１１の有効径とめねじ１１の有効径との差に基づいておねじ基準径方向の誤差を求め、その誤差に相当する角度分だけ回転機構８２により計測台８１を回転させた後、マーカー８４にてステム部２１Ａにおねじ基準径方向マーク２１５を付与するようにしてもよい。   As described above, the larger the difference between the effective diameter of the external thread 211 and the effective diameter of the female thread 11, the greater the error in the actual screw reference radial direction. Therefore, the effective diameter of the external thread 211 is measured by image analysis, and an error in the screw reference radial direction is obtained based on the difference between the effective diameter of the external thread 211 and the effective diameter of the female thread 11 obtained by the measurement, After rotating the measuring table 81 by the rotation mechanism 82 by an angle corresponding to the error, the screw reference radial direction mark 215 may be given to the stem portion 21A by the marker 84.

また、第３実施形態では、おねじ２１１の山から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定したが、おねじ２１１の谷から第２着座面２１２までのおねじ軸線方向の距離Ｌ３を測定するようにしてもよい。この場合には、第１着座面１２からめねじ軸線方向に第２所定距離Ｌ２離れた位置にめねじ１１の山を位置させる。   In the third embodiment, the distance L3 in the male screw axis direction from the crest of the male screw 211 to the second seating surface 212 is measured, but the male screw axis direction from the trough of the male screw 211 to the second seating surface 212 is measured. The distance L3 may be measured. In this case, the thread of the female screw 11 is positioned at a position away from the first seating surface 12 in the female screw axial direction by a second predetermined distance L2.

（他の実施形態）
上記各実施形態では、本発明をインジェクタに適用したが、本発明はインジェクタ以外にも適用することができる。 (Other embodiments)
In each of the above embodiments, the present invention is applied to an injector, but the present invention can also be applied to other than the injector.

また、上記各実施形態では、圧力を検出するセンサ装置を示したが、本発明は圧力以外の物理量を検出するセンサ装置にも適用することができる。   In each of the above embodiments, a sensor device that detects pressure is shown. However, the present invention can also be applied to a sensor device that detects a physical quantity other than pressure.

また、本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。   Further, the present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope described in the claims.

また、上記各実施形態は、互いに無関係なものではなく、組み合わせが明らかに不可な場合を除き、適宜組み合わせが可能である。   Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible.

また、上記各実施形態において、実施形態を構成する要素は、特に必須であると明示した場合および原理的に明らかに必須であると考えられる場合等を除き、必ずしも必須のものではないことは言うまでもない。   In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes.

また、上記各実施形態において、実施形態の構成要素の個数、数値、量、範囲等の数値が言及されている場合、特に必須であると明示した場合および原理的に明らかに特定の数に限定される場合等を除き、その特定の数に限定されるものではない。   Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case.

また、上記各実施形態において、構成要素等の形状、位置関係等に言及するときは、特に明示した場合および原理的に特定の形状、位置関係等に限定される場合等を除き、その形状、位置関係等に限定されるものではない。   Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

１ 第１部材
５ 加工機
１１ めねじ
１２ 第１着座面
２３ モールドＩＣ（第３部材）
２１１ おねじ
２１２ 第２着座面
１１ａ 下孔
２１Ａ 第２部材
２１Ｂ 鍔部（第３部材） DESCRIPTION OF SYMBOLS 1 1st member 5 Processing machine 11 Female screw 12 1st seating surface 23 Mold IC (3rd member)
211 external thread 212 second seating surface 11a pilot hole 21A second member 21B collar (third member)

Claims (6)

めねじ（１１）および第１着座面（１２）を第１部材（１）に形成する第１加工工程と、前記めねじに螺合されるおねじ（２１１）および前記第１着座面に当接する第２着座面（２１２）を第２部材（２１Ａ）に形成するとともに前記第２部材に第３部材（２１Ｂ、２３）を接合する第２加工工程とを備える、ねじ締結部品の製造方法であって、
前記めねじの径方向のうち、予め定めた特定の方向をめねじ基準径方向とし、
前記おねじの径方向のうち、前記第２着座面からおねじ軸線方向に第２所定距離離れ且つ前記おねじの山または谷が位置する部位を通る方向をおねじ基準径方向としたとき、
前記第１加工工程は、前記めねじを加工する加工機（５）に前記第１部材をセットし、前記めねじの下孔（１１ａ）および前記第１着座面を加工する下孔加工工程と、前記第１着座面のめねじ軸線方向の位置を計測する第１着座面位置計測工程と、前記第１着座面からめねじ軸線方向に前記第２所定距離離れ且つめねじ基準径方向に前記めねじの谷または山が位置するように前記めねじを加工するめねじ加工工程を備え、
前記第２加工工程は、前記おねじを加工するおねじ加工工程と、前記おねじ基準径方向を決定するおねじ基準径方向決定工程と、前記おねじ基準径方向を基準にして前記第２部材に対する前記第３部材の位置決めを行って前記第２部材に前記第３部材を接合する接合工程とを備えることを特徴とするねじ締結部品の製造方法。 The first machining step for forming the female screw (11) and the first seating surface (12) on the first member (1), the male screw (211) screwed to the female screw, and the first seating surface A method of manufacturing a screw fastening component, comprising: forming a second seating surface (212) in contact with the second member (21A); and a second processing step of joining the third member (21B, 23) to the second member. There,
Among the radial directions of the female screw, a predetermined specific direction is a female screw reference radial direction,
Among the radial directions of the male screw, when the direction passing through the portion where the crest or valley of the male screw is located at a second predetermined distance from the second seating surface in the male screw axial direction is the male screw reference radial direction,
The first machining step includes setting the first member on a processing machine (5) for processing the female screw, and preparing a pilot hole (11a) and the first seating surface of the female screw. A first seating surface position measuring step for measuring a position of the first seating surface in the female screw axial direction; and a second predetermined distance away from the first seating surface in the female screw axial direction and the female screw reference radial direction. A female thread machining step for machining the female thread so that a thread valley or thread is located;
The second machining step includes a male screw machining step for machining the male screw, a male screw reference radial direction determination step for determining the male screw reference radial direction, and the second screw thread based on the male screw reference radial direction. A method of manufacturing a screw fastening component comprising: a joining step of positioning the third member relative to a member to join the third member to the second member. 前記おねじが螺合される治具めねじ（６１）および前記第２着座面が当接する治具着座面（６２）を有する治具（６）を用意し、
前記治具めねじの径方向のうち、前記治具着座面から治具めねじ軸線方向に前記第２所定距離離れ且つ前記治具めねじの谷または山が位置する部位を通る方向を治具めねじ基準径方向としたとき、
前記治具は、前記治具めねじ基準径方向を示す治具めねじ基準径方向マーク（６３）を備え、
前記おねじ基準径方向決定工程は、前記治具に前記第２部材を組み付け、前記治具めねじ基準径方向マークを基準にして前記おねじ基準径方向を示すおねじ基準径方向マーク（２１５）を前記第２部材に付与し、
前記接合工程は、前記第２部材を前記治具から取り外した後に、前記おねじ基準径方向マークを基準にして前記第３部材の位置決めを行って前記第２部材に前記第３部材を接合することを特徴とする請求項１に記載のねじ締結部品の製造方法。 A jig (6) having a jig female screw (61) to which the male screw is screwed and a jig seating surface (62) with which the second seating surface abuts is prepared,
Of the radial direction of the jig female screw, the jig is located in a direction passing through the portion where the valley or the mountain of the jig female screw is located at the second predetermined distance from the jig seating surface in the jig female screw axial direction. When the female thread reference radial direction is used,
The jig includes a jig female screw reference radial direction mark (63) indicating the jig female screw reference radial direction,
In the male screw reference radial direction determination step, the second member is assembled to the jig, and the male screw reference radial direction mark (215) indicating the male screw reference radial direction with reference to the jig female screw reference radial direction mark. ) To the second member,
In the joining step, after the second member is removed from the jig, the third member is positioned with reference to the male screw reference radial direction mark to join the third member to the second member. The method of manufacturing a screw fastening part according to claim 1. 前記おねじが螺合される治具めねじ（６１）および前記第２着座面が当接する治具着座面（６２）を有する治具（６）を用意し、
前記治具めねじの径方向のうち、前記治具着座面から治具めねじ軸線方向に前記第２所定距離離れ且つ前記治具めねじの谷または山が位置する部位を通る方向を治具めねじ基準径方向としたとき、
前記治具は、前記治具めねじ基準径方向を示す治具めねじ基準径方向マーク（６３）を備え、
前記接合工程は、前記第２部材を前記治具に組み付けた状態で、前記治具めねじ基準径方向マークを基準にして前記第３部材の位置決めを行って前記第２部材に前記第３部材を接合することを特徴とする請求項１に記載のねじ締結部品の製造方法。 A jig (6) having a jig female screw (61) to which the male screw is screwed and a jig seating surface (62) with which the second seating surface abuts is prepared,
Of the radial direction of the jig female screw, the jig is located in a direction passing through the portion where the valley or the mountain of the jig female screw is located at the second predetermined distance from the jig seating surface in the jig female screw axial direction. When the female thread reference radial direction is used,
The jig includes a jig female screw reference radial direction mark (63) indicating the jig female screw reference radial direction,
In the joining step, the third member is positioned on the second member by positioning the third member with reference to the jig female screw reference radial direction mark in a state where the second member is assembled to the jig. The method of manufacturing a screw fastening part according to claim 1, wherein 前記おねじ基準径方向決定工程は、前記第２部材を台（７１）に載せ、前記第２所定距離離れた付近に位置する前記おねじの山または谷から前記第２着座面までのおねじ軸線方向の距離を測定し、この測定して得られた距離と前記第２所定距離との差を考慮して前記おねじ基準径方向を求めることを特徴とする請求項１に記載のねじ締結部品の製造方法。   In the male screw reference radial direction determining step, the second member is placed on the base (71), and the male screw from the crest or trough of the male screw located near the second predetermined distance to the second seating surface is provided. The screw fastening according to claim 1, wherein a distance in the axial direction is measured, and the male screw reference radial direction is obtained in consideration of a difference between the distance obtained by the measurement and the second predetermined distance. A manufacturing method for parts. 前記おねじ基準径方向決定工程は、前記第２部材を回転可能な状態で台（８１）に載せ、前記第２所定距離離れた付近に位置する前記おねじの山または谷から前記第２着座面までのおねじ軸線方向の距離を測定し、この測定して得られた距離が前記第２所定距離と等しくなる位置まで前記第２部材を回転させて前記おねじ基準径方向を求めることを特徴とする請求項１に記載のねじ締結部品の製造方法。   In the male screw reference radial direction determining step, the second member is placed on a stand (81) in a rotatable state, and the second seating is carried out from the crest or trough of the male screw located near the second predetermined distance. Measuring the distance in the axial direction of the male screw to the surface, and rotating the second member to a position where the distance obtained by the measurement is equal to the second predetermined distance to obtain the male screw reference radial direction. The method for manufacturing a screw fastening part according to claim 1, wherein 前記第２加工工程は、前記おねじの有効径を測定するおねじ有効径測定工程を備え、
前記おねじ基準径方向決定工程は、前記めねじの有効径と前記おねじの有効径との差を考慮して前記おねじ基準径方向を求めることを特徴とする請求項４または５に記載のねじ締結部品の製造方法。 The second processing step includes a male screw effective diameter measuring step of measuring an effective diameter of the male screw,
6. The male screw reference radial direction is determined in consideration of a difference between an effective diameter of the female screw and an effective diameter of the male screw in the male screw reference radial direction determination step. Manufacturing method for screw fastening parts.
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