WO2010018721A1 - Method of detecting treatment pressure in autofrettage treatment of high-pressure fuel pipe for diesel engine and method and device for autofrettage treatment using the detecting method - Google Patents

Method of detecting treatment pressure in autofrettage treatment of high-pressure fuel pipe for diesel engine and method and device for autofrettage treatment using the detecting method Download PDF

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WO2010018721A1
WO2010018721A1 PCT/JP2009/062336 JP2009062336W WO2010018721A1 WO 2010018721 A1 WO2010018721 A1 WO 2010018721A1 JP 2009062336 W JP2009062336 W JP 2009062336W WO 2010018721 A1 WO2010018721 A1 WO 2010018721A1
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pressure
processing
auto
value
fretting
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PCT/JP2009/062336
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French (fr)
Japanese (ja)
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文彦 志村
勝彦 西家
草薙 隆一
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臼井国際産業株式会社
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Priority to JP2008207444A priority patent/JP2010043920A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • B21D26/041Means for controlling fluid parameters, e.g. pressure or temperature
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00Modifying the physical properties of iron or steel by deformation
    • C21D7/02Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C21D7/12Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025Common rails

Abstract

Disclosed is a method of detecting the treatment pressure of an autofrettage treatment device for performing an autofrettage treatment by applying a high-pressure treatment pressure into a high-pressure fuel pipe for a diesel engine, wherein at least two pressure gauges (P1, P2) for detecting the treatment pressure are installed, close to the high-pressure fuel pipe (1-1), on the downstream side of the high-pressure fuel pipe in a high-pressure fluid circuit.  An autofrettage treatment pressure is measured by at least two pressure gauges (P1, P2).  Since the shortage or excess of the treatment pressure occurring due to the defect of the pressure gauges, particularly the defect of the pressure sensor of a pressure measuring system in the autofrettage treatment can be prevented from occurring, a desired treatment pressure can be surely and accurately applied to a work.

Description

ディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法及びこの検出方法を用いたオートフレッタージ処理方法並びにその処理装置Method for detecting processing pressure in auto-fretting treatment of high-pressure fuel pipe for diesel engine, auto-fretting processing method using this detecting method, and processing device therefor
 本発明は、主に蓄圧式燃料噴射システムを搭載したディーゼルエンジン用の高圧燃料配管として使用されるコモンレール、噴射管、供給管等の内圧疲労強度を向上させるために行われるオートフレッタージ処理に係り、より詳しくは前記高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法及びこの検出方法を用いたオートフレッタージ処理方法並びにその処理装置に関する。 The present invention relates to an auto-fretting process performed to improve internal pressure fatigue strength of common rails, injection pipes, supply pipes, etc., which are mainly used as high-pressure fuel pipes for diesel engines equipped with an accumulator fuel injection system. More specifically, the present invention relates to a method for detecting a processing pressure in auto-fretting processing of the high-pressure fuel pipe, an auto-fretting processing method using this detecting method, and a processing apparatus therefor.
 従来、ディーゼルエンジン用の高圧燃料配管として使用されるコモンレールとしては、例えば図11に示すように軸心方向内部に流通路11-1を有する厚肉細径の本管レール11に、該本管レールと一体のボス部11-2が軸心方向に間隔をおいて複数個設けられ、前記各ボス部11-2に本管レール11の流通路11-1に連通する所定径の分岐孔11-3が穿設された構造のものが知られている(特許文献1参照)。又、前記噴射管としては、例えば図12に示すように、厚肉細径鋼管21の接続端部に、球面状のシート面23と、該シート面23から軸芯方向に間隔をおいて設けた環状フランジ部25と、前記シート面23に連なって前記環状フランジ部25まで先端に向って先細りとなる円錐面24とから形成された接続頭部22を有するものが知られている(特許文献2の図4参照)。 Conventionally, as a common rail used as a high-pressure fuel pipe for a diesel engine, for example, as shown in FIG. 11, the main pipe is connected to a thick-walled main rail 11 having a flow passage 11-1 in the axial center direction. A plurality of boss portions 11-2 integral with the rail are provided at intervals in the axial direction, and branch holes 11 having a predetermined diameter communicating with the flow passages 11-1 of the main rail 11 to the boss portions 11-2. A structure in which -3 is perforated is known (see Patent Document 1). Further, as the injection pipe, for example, as shown in FIG. 12, a spherical sheet surface 23 is provided at a connection end portion of the thick thin steel pipe 21 and spaced from the sheet surface 23 in the axial direction. There is known one having a connecting head portion 22 formed from an annular flange portion 25 and a conical surface 24 that is continuous with the seat surface 23 and tapers toward the tip to the annular flange portion 25 (Patent Literature). 2 (see FIG. 4).
 このような構造の高圧燃料配管は、その製造時において耐圧検査等の内圧付与作業が行われる。この耐圧検査等の一つに、高圧燃料配管の内圧疲労強度を向上させるために行われるオートフレッタージ処理がある。このオートフレッタージ処理は、高圧燃料配管(コモンレール、噴射管等)をシールした状態で当該管内に高圧を付与して行われるのが一般的である。
 従来行われている高圧燃料配管のオートフレッタージ処理方法としては、オートフレッタージ装置の増圧装置の低圧側の圧力を測定し、低圧側シリンダの面積と高圧側ピストンの面積から算出される増圧比から高圧側の圧力を算出し、その算出値をオートフレッタージ圧力として代用する方法、あるいは高圧側の圧力計として、一台の圧力計(1個の圧力センサー)のみを使用してオートフレッタージ処理圧力を計測する方法等が知られている。
The high pressure fuel pipe having such a structure is subjected to an internal pressure application operation such as a pressure resistance test at the time of manufacture. One example of this pressure resistance test is an auto-fretting process performed to improve the internal pressure fatigue strength of the high-pressure fuel pipe. This auto-fretting process is generally performed by applying a high pressure to the high-pressure fuel pipe (common rail, injection pipe, etc.) in a sealed state.
As a conventional auto-fretting method for high-pressure fuel piping, the pressure on the low-pressure side of the pressure increasing device of the auto-fretting device is measured, and the increase calculated from the area of the low-pressure side cylinder and the area of the high-pressure side piston is performed. The pressure on the high pressure side is calculated from the pressure ratio, and the calculated value is substituted for the autofretting pressure. Alternatively, only one pressure gauge (one pressure sensor) is used as the high pressure side pressure gauge. A method for measuring the Taj treatment pressure is known.
特許第2599651号Patent No. 2599651 特開2003-336560号JP 2003-336560 A
 しかしながら、前記した従来のオートフレッタージ処理方法には、以下に記載する問題点があった。
 前者のオートフレッタージ装置の増圧装置の低圧側の圧力を測定し、低圧側シリンダの面積と高圧側ピストンの面積から算出される増圧比から高圧側の圧力を算出し、その算出値をオートフレッタージ圧力として代用する方法は、増圧装置の低圧側の圧力を測定し、低圧側シリンダ面積と高圧側ピストン面積から算出される増圧比から高圧側の圧力をオートフレッタージ処理圧力として計算するため、その得られたオートフレッタージ処理圧力値は計算値であり、実際にワーク(高圧燃料配管)に作用する圧力と同一であるという保証は全くない。例えば、増圧装置のシリンダとピストンの間隙からの流体漏れが著しい場合には、十分な処理圧力がワークに作用せず、ワークの疲労強度設計上十分な残留応力が得られないために、結果としてワークの実使用時に繰返し作用する内圧によって破損することが危惧される。このため、低圧側の圧力値と増圧比から計算により求める処理圧力は、オートフレッタージ処理圧力として信頼性に欠けるという問題がある。
However, the above-described conventional autofretting method has the following problems.
Measure the pressure on the low pressure side of the pressure booster of the former auto-fretting device, calculate the pressure on the high pressure side from the pressure increase ratio calculated from the area of the low pressure side cylinder and the area of the high pressure side piston. The method of substituting as the fretting pressure is to measure the pressure on the low pressure side of the pressure increasing device, and calculate the pressure on the high pressure side as the auto fretting processing pressure from the pressure increasing ratio calculated from the low pressure side cylinder area and the high pressure side piston area. For this reason, the obtained auto-fretting treatment pressure value is a calculated value, and there is no guarantee that it is the same as the pressure actually acting on the workpiece (high-pressure fuel pipe). For example, when fluid leakage from the gap between the cylinder and piston of the pressure booster is significant, sufficient processing pressure does not act on the workpiece, and sufficient residual stress cannot be obtained in designing the fatigue strength of the workpiece. As a result, it is feared that it will be damaged by internal pressure that repeatedly acts during actual use of the workpiece. For this reason, there is a problem that the processing pressure obtained by calculation from the pressure value on the low-pressure side and the pressure increase ratio is not reliable as the auto-fretting processing pressure.
 又、後者の一台の圧力計(1個の圧力センサー)のみを使用してオートフレッタージ処理圧力を計測する方法は、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴うオートフレッタージ処理圧力の高圧化に対応することが極めて困難であるという問題がある。即ち、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴い、オートフレッタージ処理に必要な圧力も10000barの超高圧に迫るまでに高圧化しているにもかかわらず、このような高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しないため、既存の圧力計ではこのような高圧下でのオートフレッタージ処理が困難な状況にある。より具体的には、圧力計(圧力センサー)を一台しか使用しない従来の圧力測定システムの場合、既存の圧力計ではその個体差に応じて、故障あるいは劣化までの使用回数が左右されてしまうために定期交換のための交換頻度を設定することが非常に困難であり、一台のみの圧力計(1個の圧力センサー)の使用では所望する圧力にて確実にオートフレッタージ処理することを保証するのは困難である。例えば、実際には圧力計(圧力センサー)が既に故障し交換の必要が生じていたにもかかわらず、その故障を検出あるいは検知する手段がないために故障が生じた状態でオートフレッタージ処理を実施した場合には、処理圧力が十分に得られなかったり、処理圧力が過大であることにより、結果として実使用時におけるワークの破損、あるいはオートフレッタージ処理中におけるワークの破損等の問題が生じる危惧が大きくなるといった問題があった。 In addition, the method of measuring the auto-fretting process pressure using only the latter one pressure gauge (one pressure sensor) is the auto-fretting process pressure accompanying the recent increase in fuel injection pressure in diesel engines. There is a problem that it is extremely difficult to cope with the high pressure of the. In other words, with the recent increase in fuel injection pressure in diesel engines, the pressure required for auto-fretting treatment has been increased to approach the ultra-high pressure of 10000 bar. Since there are no pressure gauges or pressure sensors with guaranteed durability and repeatability, it is difficult for existing pressure gauges to perform auto-fretting under such high pressures. More specifically, in the case of a conventional pressure measurement system that uses only one pressure gauge (pressure sensor), the number of times of use until failure or deterioration is affected by existing pressure gauges depending on individual differences. Therefore, it is very difficult to set the replacement frequency for periodic replacement, and with the use of only one pressure gauge (one pressure sensor), it is necessary to perform auto-fretting with the desired pressure. It is difficult to guarantee. For example, even though the pressure gauge (pressure sensor) has actually failed and needs to be replaced, there is no means to detect or detect the failure, so auto-fretting processing is performed in the state where the failure has occurred. If implemented, the processing pressure cannot be obtained sufficiently or the processing pressure is excessive, resulting in problems such as damage to the work during actual use or work damage during the autofretting process. There was a problem of growing concern.
 本発明は、上記した問題を解決するためになされたもので、オートフレッタージ処理における圧力計の故障、特に圧力計測システムを構成する圧力センサー異常等によって発生する処理圧力の不足や過剰を防ぎ、所望する処理圧力を確実にかつ精度よくワークに作用させることができる、ディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法及びこの検出方法を用いたオートフレッタージ処理方法並びにその処理装置を提案しようとするものである。 The present invention has been made to solve the above-described problems, and prevents a pressure gauge failure in an auto-fretting process, particularly a shortage or excess of a processing pressure caused by an abnormality in a pressure sensor constituting a pressure measurement system, A method for detecting a processing pressure in an auto-fretting process of a high-pressure fuel pipe for a diesel engine capable of causing a desired processing pressure to act on a work reliably and accurately, an auto-fretting process method using this detection method, and a process thereof The device is to be proposed.
 本発明に係るディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法は、ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置の処理圧力を検出する方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にてオートフレッタージ処理圧力を計測することを特徴とするものである。 The method for detecting the processing pressure in the auto-fretting process of the high-pressure fuel pipe for a diesel engine according to the present invention is an auto-fretting process device for applying a high-pressure processing pressure to the high-pressure fuel pipe for a diesel engine to perform the auto-fretting process. In the method for detecting the processing pressure, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, It measures auto-fretting processing pressure with a pressure gauge.
 更に、本発明の検出方法は、前記処理圧力を検出する圧力計として、前記高圧流体回路の前記高圧燃料配管の下流側の2台に加え、上流側にも少なくとも1台設置し、少なくとも3台の圧力計にてオートフレッタージ処理圧力を計測することを好ましい態様とするものである。 Furthermore, in the detection method of the present invention, as the pressure gauge for detecting the processing pressure, in addition to two units on the downstream side of the high-pressure fuel pipe of the high-pressure fluid circuit, at least one unit is installed on the upstream side, and at least three units are installed. It is preferable to measure the auto-fretting treatment pressure with a pressure gauge.
 又、本発明は前記処理圧力の検出方法において、処理圧力の正常又は異常の判定方法として以下に記載する5つの方法を好ましい態様とするものである。
 (1) 前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内の時は処理圧力を正常値と判定し、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時は処理圧力を異常値と判定する方法。
 (2) 前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その実測処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が、予め設定された処理圧力の許容誤差β内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定されたオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が予め設定された許容誤差βを超える時は、処理圧力を異常値と判定する方法。
 (3) 前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時は処理圧力を正常値と判定し、他方、前記圧力計の計測値PH1とPH2の差ΔPの絶対値が許容誤差αを超える時、又は/及び、前記ΔP2の絶対値が許容誤差γを超える時は、処理圧力を異常値と判定する方法。
 (4) 前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と該高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された許容誤差δを超える時は、処理圧力を異常値と判定する方法。
 (5) 前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時、更に、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力を異常値と判定する方法。
Further, in the present invention, in the method for detecting a processing pressure, the following five methods are preferable as a method for determining whether the processing pressure is normal or abnormal.
(1) When the absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges downstream of the high-pressure fuel pipe is within a preset tolerance α, the processing pressure is determined to be a normal value. A method of determining the processing pressure as an abnormal value when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α.
(2) The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within a preset tolerance α, and the measured processing pressure value PAF When the absolute value of the difference ΔP1 between the measured value PH1 or PH2 of the pressure gauge is within a preset processing pressure tolerance β, the processing pressure is determined as a normal value, while the measured values PH1 and PH2 When the absolute value of the difference ΔP exceeds the allowable error α, and / or the absolute value of the difference ΔP1 between the preset auto-fretting processing pressure value PAF and the measured value PH1 or PH2 of the pressure gauge is determined in advance. A method of determining the processing pressure as an abnormal value when the set allowable error β is exceeded.
(3) The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges downstream of the high-pressure fuel pipe is within a preset tolerance α, and the high-pressure fuel for the diesel engine An evaluation pressure PE obtained by calculating from a low pressure value PL of a pressure gauge installed upstream of a pressure intensifier that applies a high processing pressure in the pipe and a pressure increase ratio i of the pressure intensifier, and the two pressure values When the absolute value of the difference ΔP2 from the PH1 or PH2 is within the preset allowable error γ, the processing pressure is determined as a normal value, while the absolute value of the difference ΔP between the pressure gauge measured values PH1 and PH2 is acceptable. A method of determining the processing pressure as an abnormal value when the error α is exceeded or / and when the absolute value of ΔP2 exceeds the allowable error γ.
(4) The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges downstream of the high-pressure fuel pipe is within a preset tolerance α, and the high-pressure fuel for the diesel engine A pipe outer diameter measurement type pressure value PD converted from a measurement value of a pipe outer diameter measurement type sensor provided in a straight pipe part between the pressure intensifier for applying a high processing pressure in the pipe and the high pressure fuel pipe; When the absolute value of the difference ΔP3 between the two pressure values PH1 or PH2 is within a preset tolerance δ, the processing pressure is determined to be a normal value, while the absolute value of the difference ΔP between the measured values PH1 and PH2 is When the allowable error α is exceeded, or / and when the absolute value of the difference ΔP3 between the two pressure values PH1 or PH2 and the pipe outer diameter measuring pressure value PD exceeds a preset allowable error δ, A method of determining a processing pressure as an abnormal value.
(5) The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges downstream of the high-pressure fuel pipe is within a preset tolerance α, and the high-pressure fuel for the diesel engine An evaluation pressure PE obtained by calculating from a low pressure value PL of a pressure gauge installed upstream of a pressure intensifier that applies a high processing pressure in the pipe and a pressure increase ratio i of the pressure intensifier, and the two pressure values When the absolute value of the difference ΔP2 from PH1 or PH2 is within a preset tolerance γ, the measured value of the pipe outer diameter measuring sensor provided in the straight pipe portion between the pressure intensifier and the high pressure fuel pipe When the absolute value of the difference ΔP4 between the pipe outer diameter measurement pressure value PD converted in advance and the auto-fretting processing pressure value PAF set in advance is within the preset allowable error ε, the processing pressure is determined to be a normal value. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, And / or when the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE exceeds a preset allowable error γ, and / or the pipe outer diameter measuring pressure value PD A method of determining the processing pressure as an abnormal value when the absolute value of the difference ΔP4 with respect to the preset auto-fretting processing pressure value PAF exceeds a preset allowable error ε.
 次に、本発明に係るディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法は、以下に記載する方法を要旨とするものである。
 (1) ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が予め設定された許容誤差α内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記2つの圧力値の差ΔPの絶対値が前記許容誤差αを超える時は処理圧力を異常値と判定し、オートフレッタージ処理を停止する方法。
 (2) ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その予め設定されたオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔP1の絶対値が、予め設定された許容誤差β内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定されたオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔPの絶対値が予め設定された許容誤差βを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止する方法。
 (3) ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止する方法。
 (4) ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された許容誤差δを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止する方法。
 (5) ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内にあり、更に、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PEとの差ΔP2の絶対値が予め設定された許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止する方法。
Next, the auto-fretting treatment method for high-pressure fuel pipes for diesel engines according to the present invention is summarized as follows.
(1) A high pressure processing pressure is applied to a high pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high pressure fuel pipe of the high pressure fluid circuit. In the method of performing the Taj treatment, at least two pressure gauges for detecting the treatment pressure are installed in the vicinity of the high-pressure fuel pipe, and two pressure values PH1 and PH2 measured by the at least two pressure gauges. When the absolute value of the difference ΔP is within the preset allowable error α, the processing pressure is determined to be a normal value, and the auto-fretting process is continued. On the other hand, the absolute value of the difference ΔP between the two pressure values is When the allowable error α is exceeded, the processing pressure is judged to be an abnormal value, and the auto-fretting process is stopped.
(2) A high pressure processing pressure is applied to a high pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high pressure fuel pipe of the high pressure fluid circuit to detect autofrequencies. In the method of performing the Taj process, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, and the at least two pressure gauges The absolute value of the difference ΔP between the two pressure values PH1 and PH2 measured in step 1 is within a preset allowable error α, and the preset auto-fretting processing pressure value PAF and the pressure gauge When the absolute value of the difference ΔP1 from the measured value PH1 or PH2 is within the preset allowable error β, the processing pressure is determined to be a normal value and the auto-fretting process is continued, while the measured values PH1 and PH2 are continued. The absolute value of the difference ΔP is When the error α is exceeded, or / and when the absolute value of the difference ΔP between the preset autofretting processing pressure value PAF and the pressure gauge measured value PH1 or PH2 exceeds a preset allowable error β Is a method of judging the processing pressure as an abnormal value and stopping the auto-fretting process.
(3) A high pressure processing pressure is applied to the high pressure fuel pipe for the diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high pressure fuel pipe of the high pressure fluid circuit to detect auto-fretting. In the method of performing the Taj process, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, and the at least two pressure gauges The absolute value of the difference ΔP between the two pressure values PH1 and PH2 measured in step 1 is within a preset tolerance α, and the low pressure value PL of the pressure gauge installed upstream of the pressure intensifier When the absolute value of the difference ΔP2 between the evaluation pressure PE calculated from the pressure increase ratio i of the pressure booster and the two pressure values PH1 or PH2 is within a preset allowable error γ, the processing pressure is normal. Value, and continue auto-fretting. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE is set in advance. When the permissible error γ is exceeded, the processing pressure is determined to be an abnormal value, and the auto-fretting process is stopped.
(4) A high pressure processing pressure is applied to the high pressure fuel piping for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high pressure fuel piping of the high pressure fluid circuit to detect autofrequencies. In the method of performing the Taj process, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, and the at least two pressure gauges The absolute value of the difference ΔP between the two pressure values PH1 and PH2 measured in step 1 is within a preset allowable error α, and is provided in the straight pipe portion between the pressure intensifier and the high pressure fuel pipe. Processing is performed when the absolute value of the difference ΔP3 between the pipe outside diameter measuring pressure value PD converted from the pipe outside diameter measuring sensor and the two pressure values PH1 or PH2 is within a preset tolerance δ. Pressure is judged to be normal and auto fretting On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, or / and the two pressure values PH1 or PH2 and the pipe outer diameter measuring pressure value PD When the absolute value of the difference ΔP3 exceeds a preset allowable error δ, the processing pressure is determined to be an abnormal value, and the auto-fretting process is stopped.
(5) A high pressure processing pressure is applied to the high pressure fuel piping for the diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed downstream of the high pressure fuel piping of the high pressure fluid circuit to detect autofrequencies. In the method of performing the Taj process, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, and the at least two pressure gauges The absolute value of the difference ΔP between the two pressure values PH1 and PH2 measured in step 1 is within a preset tolerance α, and the low pressure value PL of the pressure gauge installed upstream of the pressure intensifier The absolute value of the difference ΔP2 between the evaluation pressure PE calculated from the pressure increase ratio i of the pressure intensifier and the two pressure values PH1 or PH2 is within a preset allowable error γ, and the increase Outside the pipe provided in the straight pipe section between the pressure device and the high-pressure fuel pipe When the absolute value of the difference ΔP4 between the pipe outer diameter measurement pressure value PD converted from the measurement value of the measurement sensor and the preset auto-fretting process pressure value PAF is within the preset tolerance ε, the process pressure Is determined to be a normal value and the auto-fretting process is continued. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the two pressure values PH1 or PH2 When the absolute value of the difference ΔP2 between the pressure and the evaluation pressure PE exceeds a preset allowable error γ, or / and the pipe outer diameter measuring pressure value PD and a preset auto fretted processing pressure value PAF When the absolute value of the difference ΔP4 exceeds a preset allowable error ε, the processing pressure is determined to be an abnormal value, and the auto-fretting process is stopped.
 更に、本発明に係るディーゼルエンジン用高圧燃料配管のオートフレッタージ処理装置は、ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と前記高圧燃料配管との間に設けた、所定の処理圧力付与時における内表面の応力が弾性変形範囲内に設定された直管部に、処理圧力付与時の外径変化を計測する管外径計測式センサーを有し、前記少なくとも2台の圧力計と、前記管外径計測式センサーの各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするものである。
 本発明の処理装置はまた、ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、前記少なくとも2台の圧力計の各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするものである。
Furthermore, an auto fritterage processing apparatus for high-pressure fuel pipes for diesel engines according to the present invention is an auto-fritterage processing apparatus for applying auto-fretage processing by applying a high-pressure processing pressure in high-pressure fuel pipes for diesel engines. At least two pressure gauges for detecting the processing pressure are provided on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit in the vicinity of the high-pressure fuel pipe, and a high-pressure processing pressure is provided in the high-pressure fuel pipe for the diesel engine. Provided between the intensifier to be applied and the high-pressure fuel pipe, a change in the outer diameter at the time of applying the processing pressure is applied to the straight pipe portion in which the stress of the inner surface at the time of applying the predetermined processing pressure is set within the elastic deformation range. It has a pipe outer diameter measuring sensor for measuring, and an auto frittering process is performed based on the measured values of the at least two pressure gauges and the pipe outer diameter measuring sensor. Is characterized in that no configured to include a detection means for automatically displaying works and without, and normal or abnormal in the auto-fretting Taj process pressure for detecting pressure.
The processing apparatus of the present invention also provides a pressure gauge for detecting the processing pressure in a high-pressure fluid circuit in an auto-fretting processing apparatus that applies auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine. At least two units in the vicinity of the high-pressure fuel pipe on the downstream side of the high-pressure fuel pipe, and a mechanism for detecting the auto-fretting process pressure based on the measured values of the at least two pressure gauges; and The present invention is characterized by comprising a detecting means for automatically displaying normality or abnormality of the auto-fretting treatment pressure.
 更に、本発明装置は、ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記増圧器の上流側に少なくとも1台の低圧側圧力計を備え、前記少なくとも2台の圧力計と、前記少なくとも1台の低圧側圧力計の各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とし、
 更に又、本発明装置は、ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と前記高圧燃料配管との間に設けた、所定処理圧力付与時における内表面の応力が弾性変形範囲内に設定された直管部に、処理圧力付与時の外径変化を計測する管外径計測センサーを有し、更に又、前記増圧器の上流側に少なくとも1台の低圧側圧力計を備え、前記高圧燃料配管の下流側に少なくとも2台の圧力計と、前記増圧器の上流側の少なくとも1台の低圧側圧力計の各計測値、及び、前記管外径計測センサーの各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするものである。
Furthermore, the device of the present invention is an auto-fretting process device that applies auto-fretting processing by applying a high-pressure processing pressure in a high-pressure fuel pipe for a diesel engine, and a pressure gauge for detecting the processing pressure is provided in a high-pressure fluid circuit. At least two units close to the high-pressure fuel line on the downstream side of the high-pressure fuel line, and further comprising at least one low-pressure side pressure gauge on the upstream side of the pressure intensifier, the at least two pressure gauges; There is no mechanism for detecting the auto-fretting treatment pressure based on each measurement value of the at least one low-pressure side pressure gauge, and a detecting means for automatically displaying normality or abnormality of the auto-fretting treatment pressure is provided. Characterized by the composition,
Furthermore, the device of the present invention provides a pressure gauge for detecting the processing pressure in a high-pressure fluid circuit in an auto-fretting processing device that applies a high-pressure processing pressure to a high-pressure fuel pipe for a diesel engine to perform auto-fretting processing. Between the high pressure fuel pipe and a pressure intensifier for providing a high processing pressure in the high pressure fuel pipe for the diesel engine. A straight pipe portion in which the stress of the inner surface at the time of applying the predetermined processing pressure is set within the elastic deformation range, and a pipe outer diameter measuring sensor for measuring a change in the outer diameter at the time of applying the processing pressure. And at least one low pressure gauge on the upstream side of the intensifier, at least two pressure gauges on the downstream side of the high pressure fuel pipe, and at least one low pressure side on the upstream side of the intensifier. There is no mechanism to detect auto-fretting treatment pressure based on each measurement value of force meter and each measurement value of pipe outer diameter measurement sensor, and normal or abnormal of auto-fretting treatment pressure is automatically displayed It has the structure provided with the detection means to do.
 本発明に係るディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法及び該検出方法を用いたオートフレッタージ処理方法によれば、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にてオートフレッタージ処理圧力を計測するので、オートフレッタージ処理中に圧力計の故障を検知することができ、処理圧力の正常、異常を的確に判断することができる結果、処理圧力の不足や過剰を防止することでき、常に所望する圧力にて確実にかつ精度よくオートフレッタージ処理を施すことができる。更に、10000bar程度の超高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しなくても既存の圧力計や圧力センサーを用いて、超高圧のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理を施すことが可能となる。従って、本発明の圧力測定システムによれば、実使用時における製品(ワーク)の破損、あるいはオートフレッタージ処理中における製品(ワーク)の破損等の危惧はほとんどなくなり、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴うオートフレッタージ処理圧力の高圧化にも十分に対応することができるという優れた効果を奏する。
 又、本発明に係るオートフレッタージ処理装置は、圧力測定システム自体も比較的簡易であるのみならず、既存の圧力計、増圧器及び、管外径計測センサーを用い、コンピューターシステムと組み合わせて構成することができるので、コスト的にも安価につく上、オートフレッタージ処理中に圧力計の故障を検知することができ、処理圧力の正常、異常を的確に判断することができる結果、処理圧力の不足や過剰を防止することでき、常に所望する圧力にて確実にかつ精度よくオートフレッタージ処理を施すことができる。従って、本発明装置によれば、前記したように10000bar程度の超高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しなくても既存の圧力計や圧力センサーを用いて、最近の超高圧のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理を施すことが可能となるので、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴うオートフレッタージ処理圧力の高圧化にも十分に対応することができ、内圧疲労強度のより優れた高圧燃料配管を提供することが可能となる。
According to the method for detecting the processing pressure in the auto-fretting process of the high-pressure fuel pipe for a diesel engine according to the present invention and the auto-fretting process method using the detecting method, the pressure gauge for detecting the processing pressure is provided with a high-pressure fluid circuit. Since at least two units are installed in the vicinity of the high-pressure fuel pipe on the downstream side of the high-pressure fuel pipe and the auto-fretting process pressure is measured by the at least two pressure gauges, As a result, it is possible to accurately detect whether the processing pressure is normal or abnormal. Taj treatment can be applied. Furthermore, even if there is no pressure gauge or pressure sensor that guarantees sufficient durability and repeatability under ultra high pressure of about 10,000 bar, high pressure fuel for ultra high pressure diesel engines using existing pressure gauges and pressure sensors. It is possible to perform auto-fretting of piping. Therefore, according to the pressure measurement system of the present invention, there is almost no fear of damage to the product (work) during actual use, or damage to the product (work) during autofretting, and fuel injection in recent diesel engines is eliminated. The present invention has an excellent effect that it can sufficiently cope with the increase in the auto-fretting treatment pressure accompanying the increase in pressure.
In addition, the auto-fretage processing apparatus according to the present invention is not only a relatively simple pressure measurement system itself, but also uses an existing pressure gauge, a pressure intensifier, and a pipe outer diameter measurement sensor, and is configured in combination with a computer system. As a result, the pressure gauge can be detected during the auto fretting process, and the normal or abnormal process pressure can be accurately determined. Deficiency and excess can be prevented, and auto-fretting can be performed reliably and accurately at a desired pressure at all times. Therefore, according to the apparatus of the present invention, as described above, even if there is no pressure gauge or pressure sensor that guarantees sufficient durability and repeatability under an ultrahigh pressure of about 10000 bar, the existing pressure gauge or pressure sensor can be used. Therefore, it is possible to perform auto-fretting treatment of high-pressure fuel pipes for recent ultra-high pressure diesel engines. Therefore, it is possible to provide a high-pressure fuel pipe with better internal pressure fatigue strength.
本発明に係る高圧燃料配管のオートフレッタージ処理装置の第1実施例を示す概略図である。It is the schematic which shows 1st Example of the auto fretting processing apparatus of the high pressure fuel piping which concerns on this invention. 同じく高圧燃料配管のオートフレッタージ処理装置の第2実施例を示す概略図である。It is the schematic which shows the 2nd Example of the auto-fretting processing apparatus of high pressure fuel piping similarly. 同じく高圧燃料配管のオートフレッタージ処理装置の第3実施例を示す概略図である。It is the schematic which shows 3rd Example of the auto-fretting processing apparatus of a high-pressure fuel piping similarly. 同じく高圧燃料配管のオートフレッタージ処理装置の第4実施例を示す概略図である。It is the schematic which shows the 4th Example of the auto-fretage processing apparatus of high-pressure fuel piping similarly. 同じく高圧燃料配管のオートフレッタージ処理装置の第5実施例を示す概略図である。It is the schematic which shows the 5th Example of the auto-fretage processing apparatus of high pressure fuel piping similarly. 同じく本発明に係る高圧燃料配管のオートフレッタージ処理方法の第1実施例を示すフローチャートである。It is a flowchart which similarly shows 1st Example of the auto-fretting processing method of the high pressure fuel piping which concerns on this invention. 同じく高圧燃料配管のオートフレッタージ処理方法の第2実施例を示すフローチャートである。It is a flowchart which similarly shows 2nd Example of the auto-fretting process method of high pressure fuel piping. 同じく高圧燃料配管のオートフレッタージ処理方法の第3実施例を示すフローチャートである。It is a flowchart which similarly shows the 3rd Example of the auto-fretage processing method of high pressure fuel piping. 同じく高圧燃料配管のオートフレッタージ処理方法の第4実施例を示すフローチャートである。It is a flowchart which similarly shows the 4th Example of the auto-fretage processing method of high pressure fuel piping. 同じく高圧燃料配管のオートフレッタージ処理方法の第5実施例を示すフローチャートである。It is a flowchart which similarly shows the 5th Example of the auto-fretage processing method of high pressure fuel piping. 本発明の対象とするディーゼルエンジン用のコモンレールの一例を示す断面図である。It is sectional drawing which shows an example of the common rail for diesel engines made into the object of this invention. 同じく高圧燃料噴射管の一例を示す接続頭部の断面図である。It is sectional drawing of the connection head which shows an example of a high pressure fuel injection pipe similarly.
 図1は本発明に係る高圧燃料配管のオートフレッタージ処理装置の第1実施例を示す概略図、図2は同じく高圧燃料配管のオートフレッタージ処理装置の第2実施例を示す概略図、図3は同じく高圧燃料配管のオートフレッタージ処理装置の第3実施例を示す概略図、図4は同じく高圧燃料配管のオートフレッタージ処理装置の第4実施例を示す概略図、図5は同じく高圧燃料配管のオートフレッタージ処理装置の第5実施例を示す概略図、図6は同じく本発明に係る高圧燃料配管のオートフレッタージ処理方法の第1実施例を示すフローチャート、図7は同じく高圧燃料配管のオートフレッタージ処理方法の第2実施例を示すフローチャート、図8は同じく高圧燃料配管のオートフレッタージ処理方法の第3実施例を示すフローチャート、図9は同じく高圧燃料配管のオートフレッタージ処理方法の第4実施例を示すフローチャート、図10は同じく高圧燃料配管のオートフレッタージ処理方法の第5実施例を示すフローチャートであり、1-1は高圧燃料噴射管、1-2はコモンレール、2は増圧器、3は処理圧力検出用圧力計(以下「圧力計」と略称する)、4は外径計測式センサー、5は低圧側圧力計、6は直管状のメジャー部、7Aは供給側管継手、7Bは封止側管継手、7Cはシール部材である。なお、ここでは圧力計3として2台の圧力センサーP1、P2を採用した場合を例にとり説明する。 FIG. 1 is a schematic view showing a first embodiment of an auto-fretting treatment apparatus for high-pressure fuel pipes according to the present invention, and FIG. 2 is a schematic view showing a second embodiment of the auto-fretting treatment apparatus for high-pressure fuel pipes. 3 is a schematic view showing a third embodiment of the auto-fretting treatment apparatus for high-pressure fuel pipe, FIG. 4 is a schematic view showing the fourth embodiment of the auto-fretting treatment apparatus for high-pressure fuel piping, and FIG. FIG. 6 is a flow chart showing a first embodiment of the auto-fretting method for high-pressure fuel piping according to the present invention, and FIG. 7 is also a high-pressure fuel. FIG. 8 is a flow chart showing a third embodiment of the auto-fretting method for high-pressure fuel piping. FIG. 9 is a flowchart showing a fourth embodiment of the auto-fretage processing method for high-pressure fuel pipe, and FIG. 10 is a flowchart showing the fifth embodiment of the auto-fretage processing method for high-pressure fuel pipe. High pressure fuel injection pipe, 1-2 is a common rail, 2 is a pressure intensifier, 3 is a pressure gauge for detecting processing pressure (hereinafter abbreviated as “pressure gauge”), 4 is an outer diameter measuring sensor, 5 is a low pressure gauge, 6 is a straight tubular measure, 7A is a supply side pipe joint, 7B is a sealing side pipe joint, and 7C is a seal member. Here, a case where two pressure sensors P1 and P2 are employed as the pressure gauge 3 will be described as an example.
 図1~図5(実施例1~5)に示す高圧燃料配管のオートフレッタージ処理装置において、オートフレッタージ処理圧を検出する圧力計3は、該高圧流体回路の高圧燃料配管(ワーク)である高圧燃料噴射管1-1またはコモンレール1-2より下流側でかつ該高圧燃料噴射管に近接した封止側管継手7Bの直後の圧力計用ヘッダー3-1に少なくとも2台設置する。この高圧側の圧力計用ヘッダー3-1に取付ける2台の圧力計としては、前記したように圧力計測システムを構成する圧力センサーP1、P2を採用することができる。
 本発明において、オートフレッタージ処理圧を検出する圧力計3を少なくとも2台設置するのは、1台の圧力計(1個の圧力センサーのみ)では所望する圧力にて確実にオートフレッタージ処理することを保証することが困難な場合があるためである。具体的には、1台の圧力計(1個の圧力センサーのみ)ではオートフレッタージ処理中に圧力計の故障を検知することができないためである。一方、少なくとも2台の圧力計を使用した場合には、オートフレッタージ処理中に圧力計の故障を検知することができ、処理圧力の正常、異常を的確に判断することができる。したがって、オートフレッタージ処理圧を検出する圧力計3を少なくとも2台使用することにより、処理圧力の不足や過剰を防止することでき、常に所望する圧力にて確実にかつ精度よくオートフレッタージ処理を施すことができる。さらに、10000bar程度の超高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しなくても既存の圧力計や圧力センサーを用いて、超高圧のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理を施すことが可能となる。
1 to 5 (Examples 1 to 5), the pressure gauge 3 for detecting the auto-fretting treatment pressure is the high-pressure fuel piping (work) of the high-pressure fluid circuit. At least two pressure gauge headers 3-1 are installed downstream of a certain high-pressure fuel injection pipe 1-1 or common rail 1-2 and immediately after the sealing-side pipe joint 7B close to the high-pressure fuel injection pipe. As the two pressure gauges attached to the high pressure side pressure gauge header 3-1, as described above, the pressure sensors P1 and P2 constituting the pressure measurement system can be employed.
In the present invention, at least two pressure gauges 3 for detecting the auto-fretting treatment pressure are installed because one pressure gauge (only one pressure sensor) reliably performs auto-fretting treatment at a desired pressure. This is because it may be difficult to guarantee this. Specifically, it is because a single pressure gauge (only one pressure sensor) cannot detect a failure of the pressure gauge during the auto-fretting process. On the other hand, when at least two pressure gauges are used, it is possible to detect a failure of the pressure gauge during the autofretting process, and to accurately determine whether the processing pressure is normal or abnormal. Therefore, by using at least two pressure gauges 3 for detecting the auto-fretting process pressure, it is possible to prevent the processing pressure from being insufficient or excessive, and to always perform the auto-fretting process accurately and accurately at the desired pressure. Can be applied. In addition, even if there is no pressure gauge or pressure sensor that guarantees sufficient durability and repeatability under ultra high pressure of about 10,000 bar, high pressure fuel for ultra high pressure diesel engines using existing pressure gauge and pressure sensor. It is possible to perform auto-fretting of piping.
 増圧器2は特に限定するものではないが、ピストンもしくはプランジャータイプのポンプで、高圧(吐出)側のピストン径が低圧(吸引)側のピストン径より小径となっている。増圧比iは、前記低圧(吸引)側プランジャー径と前記高圧(吐出)側プランジャー径の比であって、前記低圧(吸引)側の圧力を前記低圧側圧力計5により測定し、該測定値に前記増圧比iを乗ずることにより高圧側シリンダから吐出されるオートフレッタージ処理圧力を計算により求めることができる。 The pressure intensifier 2 is not particularly limited, but is a piston or plunger type pump, in which the piston diameter on the high pressure (discharge) side is smaller than the piston diameter on the low pressure (suction) side. The pressure increase ratio i is a ratio between the low pressure (suction) side plunger diameter and the high pressure (discharge) side plunger diameter, and the low pressure (suction) side pressure is measured by the low pressure side pressure gauge 5. By multiplying the measured value by the pressure increase ratio i, the auto-fretting treatment pressure discharged from the high-pressure side cylinder can be obtained by calculation.
 外径計測式センサー4としては、増圧器2から供給側管継手7Aまでの配管部6に、オートフレッタージ処理圧付与時における内表面の応力が弾性変形範囲内に設定された直管状のメジャー部4-1(例えば、JIS SCM 435の削出品、焼入れ焼戻し熱処理、HV≧350)を設け、オートフレッタージ処理圧付与時の外径変化を高精度に計測し、換算する方式を採用する。外径計測式センサー4のセンサー部には、例えば株式会社キーエンス製のデジタル寸法測定器(形式:LS-7030(M)、測定範囲:0.3~30mm、繰返し位置精度:±0.15μm)等を採用することができる。
 下記表1に、前記外径計測式センサー4による計測例を示す。
The outer diameter measuring sensor 4 is a straight tubular measure in which the stress on the inner surface at the time of application of the auto-fretting treatment pressure is set within the elastic deformation range on the pipe section 6 from the pressure intensifier 2 to the supply side pipe joint 7A. A part 4-1 (for example, JIS SCM 435 cutting, quenching and tempering heat treatment, HV ≧ 350) is provided, and a method of measuring and converting the outer diameter change at the time of applying the auto-fretting treatment pressure with high accuracy is adopted. The sensor part of the outer diameter measuring sensor 4 includes, for example, a digital dimension measuring instrument manufactured by Keyence Corporation (model: LS-7030 (M), measuring range: 0.3 to 30 mm, repeatability: ± 0.15 μm) Etc. can be adopted.
Table 1 below shows a measurement example by the outer diameter measuring sensor 4.
Figure JPOXMLDOC01-appb-T000001
 
Figure JPOXMLDOC01-appb-T000001
 
 なお、図1~図2に示す実施例1、2の高圧燃料配管のオートフレッタージ処理装置は、本発明の請求項13に対応する装置を示し、図3~図5に示す実施例3~5の高圧燃料配管のオートフレッタージ処理装置は、それぞれ本発明の請求項14~16に対応する装置を示したものである。すなわち、図1~図2に示す高圧燃料配管のオートフレッタージ処理装置は、本発明装置の全体の装置構成を示したものであり、図3に示す高圧燃料配管のオートフレッタージ処理装置は、前記図1~図2に示す外径計測式センサー4および低圧側圧力計5を省略した装置を、図4に示す高圧燃料配管のオートフレッタージ処理装置は、前記図1~図2に示す外径計測式センサー4を省略した装置を、図5に示す高圧燃料配管のオートフレッタージ処理装置は、前記図1~図2に示す低圧側圧力計5を省略した装置をそれぞれ示したものである。 The auto-fretting device for high-pressure fuel pipes of Examples 1 and 2 shown in FIGS. 1 and 2 shows an apparatus corresponding to claim 13 of the present invention, and Examples 3 to 5 shown in FIGS. The auto-fretting treatment apparatus for high-pressure fuel pipe No. 5 shows an apparatus corresponding to claims 14 to 16 of the present invention. That is, the high-pressure fuel pipe auto-fretting treatment apparatus shown in FIGS. 1 and 2 shows the overall apparatus configuration of the present invention apparatus, and the high-pressure fuel pipe auto-fretting treatment apparatus shown in FIG. The apparatus for omitting the outer diameter measuring sensor 4 and the low-pressure side pressure gauge 5 shown in FIGS. 1 and 2 is the same as the auto-fretting treatment apparatus for high-pressure fuel piping shown in FIG. The apparatus for omitting the diameter measurement type sensor 4 and the auto-fretting treatment apparatus for high-pressure fuel pipes shown in FIG. 5 respectively show the apparatuses in which the low-pressure side pressure gauge 5 shown in FIGS. 1 and 2 is omitted. .
 図1~図2に示す高圧燃料配管(高圧燃料噴射管1-1、コモンレール1-2)のオートフレッタージ処理装置によりオートフレッタージ処理を施す場合は、低圧ポンプ(図示せず)から低圧側圧力計5を介して増圧器2に圧力を供給し、増圧器2にて所定の圧力に増圧した後、外径計測式センサー4を介して高圧燃料噴射管1-1又はコモンレール1-2にオートフレッタージ圧をかける。そして、高圧燃料噴射管1-1またはコモンレール1-2より下流側でかつ該高圧燃料噴射管に近接して設置した2台の圧力センサーP1、P2からなる圧力計3によりオートフレッタージ処理圧力を検出する。 When auto-fretting is performed by the auto-fretting process of the high-pressure fuel pipe (high-pressure fuel injection pipe 1-1, common rail 1-2) shown in FIGS. 1 and 2, the low-pressure pump (not shown) is connected to the low-pressure side. The pressure is supplied to the pressure intensifier 2 via the pressure gauge 5 and is increased to a predetermined pressure by the pressure intensifier 2, and then the high pressure fuel injection pipe 1-1 or the common rail 1-2 is connected via the outer diameter measuring sensor 4. Apply auto fretting pressure to Then, the auto-fretting process pressure is controlled by a pressure gauge 3 including two pressure sensors P1 and P2 installed downstream of the high-pressure fuel injection pipe 1-1 or the common rail 1-2 and close to the high-pressure fuel injection pipe. To detect.
 図3に示す高圧燃料配管(高圧燃料噴射管1-1、コモンレール1-2)のオートフレッタージ処理装置によりオートフレッタージ処理を施す場合は、低圧ポンプ(図示せず)から増圧器2に圧力を供給し、増圧器2にて所定の圧力に増圧して高圧燃料噴射管1-1又はコモンレール1-2にオートフレッタージ圧をかけ、高圧燃料噴射管1-1またはコモンレール1-2より下流側でかつ該高圧燃料噴射管に近接して設置した2台の圧力センサーP1、P2からなる圧力計3によりオートフレッタージ処理圧力を検出する。 When auto-fretting processing is performed by the auto-fretting processing device of the high-pressure fuel pipe (high-pressure fuel injection pipe 1-1, common rail 1-2) shown in FIG. 3, pressure is applied to the intensifier 2 from a low-pressure pump (not shown). The pressure is increased to a predetermined pressure by the pressure intensifier 2, and the auto-fretting pressure is applied to the high-pressure fuel injection pipe 1-1 or the common rail 1-2, and downstream from the high-pressure fuel injection pipe 1-1 or the common rail 1-2. A pressure gauge 3 including two pressure sensors P1 and P2 installed on the side and in the vicinity of the high-pressure fuel injection pipe detects the auto-fretting treatment pressure.
 図4に示す高圧燃料配管(高圧燃料噴射管1-1、コモンレール1-2)のオートフレッタージ処理装置によりオートフレッタージ処理を施す場合は、低圧ポンプ(図示せず)から低圧側圧力計5を介して増圧器2に圧力を供給し、増圧器2にて所定の圧力に増圧して高圧燃料噴射管1-1又はコモンレール1-2にオートフレッタージ圧をかけ、高圧燃料噴射管1-1またはコモンレール1-2より下流側でかつ該高圧燃料噴射管に近接して設置した2台の圧力センサーP1、P2からなる圧力計3によりオートフレッタージ処理圧力を検出する。 When auto-fretting processing is performed by the auto-fretting processing device of the high-pressure fuel pipe (high-pressure fuel injection pipe 1-1, common rail 1-2) shown in FIG. 4, a low-pressure side pressure gauge 5 is supplied from a low-pressure pump (not shown). The pressure is supplied to the pressure intensifier 2 via the pressure booster 2, the pressure is increased to a predetermined pressure by the pressure intensifier 2, and auto-fretting pressure is applied to the high pressure fuel injection pipe 1-1 or the common rail 1-2. 1 or the common rail 1-2, and the pressure gauge 3 comprising two pressure sensors P1 and P2 installed in the vicinity of the high-pressure fuel injection pipe detects the auto-fretting process pressure.
 図5に示す高圧燃料配管(高圧燃料噴射管1-1、コモンレール1-2)のオートフレッタージ処理装置によりオートフレッタージ処理を施す場合は、低圧ポンプ(図示せず)から増圧器2に圧力を供給し、増圧器2にて所定の圧力に増圧した後、外径計測式センサー4を介して高圧燃料噴射管1-1又はコモンレール1-2にオートフレッタージ圧をかけ、高圧燃料噴射管1-1またはコモンレール1-2より下流側でかつ該高圧燃料噴射管に近接して設置した2台の圧力センサーP1、P2からなる圧力計3によりオートフレッタージ処理圧力を検出する。 When auto-fretting processing is performed by the auto-fretting processing device of the high-pressure fuel pipe (high-pressure fuel injection pipe 1-1, common rail 1-2) shown in FIG. 5, pressure is applied to the pressure intensifier 2 from a low-pressure pump (not shown). After the pressure is increased to a predetermined pressure by the pressure intensifier 2, the auto fritterage pressure is applied to the high pressure fuel injection pipe 1-1 or the common rail 1-2 via the outer diameter measuring sensor 4 to inject the high pressure fuel. The auto-fretting process pressure is detected by a pressure gauge 3 including two pressure sensors P1 and P2 installed downstream of the pipe 1-1 or the common rail 1-2 and close to the high-pressure fuel injection pipe.
 上記本発明のオートフレッタージ処理圧力の検出方法において、処理圧力の正常又は異常を判定する方法としては、以下に記載する5つの方法を採用することができる。 In the method for detecting auto-fretting processing pressure of the present invention, the following five methods can be adopted as methods for determining normality or abnormality of processing pressure.
 第1の方法は、前記2台の圧力センサーP1、P2の計測値PH1とPH2の差ΔPの絶対値が、予め設定された処理圧力の許容誤差α内の時は処理圧力を正常値と判定し、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時は処理圧力を異常値と判定する方法。 In the first method, when the absolute value of the difference ΔP between the measured values PH1 and PH2 of the two pressure sensors P1 and P2 is within a preset processing pressure tolerance α, the processing pressure is determined to be a normal value. When the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, the processing pressure is determined as an abnormal value.
 第2の方法は、前記2台の圧力センサーP1、P2の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その予め設定された所定のオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が、予め設定された許容誤差β内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定された所定のオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が予め設定された許容誤差βを超える時は、処理圧力を異常値と判定する方法。 In the second method, the absolute value of the difference ΔP between the measured values PH1 and PH2 of the two pressure sensors P1 and P2 is within a preset allowable error α, and the preset predetermined auto When the absolute value of the difference ΔP1 between the fretage processing pressure value PAF and the pressure gauge measured value PH1 or PH2 is within a preset tolerance β, the processing pressure is determined to be a normal value, while the measured value is When the absolute value of the difference ΔP between PH1 and PH2 exceeds the permissible error α, and / or the difference ΔP1 between the predetermined auto-fretting processing pressure value PAF set in advance and the measured value PH1 or PH2 of the pressure gauge When the absolute value of the value exceeds a preset allowable error β, the processing pressure is determined as an abnormal value.
 第3の方法は、前記2台の圧力センサーP1、P2の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器2の上流側に設置した低圧側圧力計5の低圧圧力値PL と前記増圧器2の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時は処理圧力を正常値と判定し、他方、前記圧力計の計測値PH1とPH2の差ΔPの絶対値がオートフレッタージ処理圧力の許容誤差αを超える時、又は/及び、前記ΔP2の絶対値が許容誤差γを超える時は、処理圧力を異常値と判定する方法。 In the third method, the absolute value of the difference ΔP between the measured values PH1 and PH2 of the two pressure sensors P1 and P2 is within a preset allowable error α and on the upstream side of the pressure intensifier 2. The absolute value of the difference ΔP2 between the evaluation pressure PE calculated from the low pressure value PL of the low pressure side pressure gauge 5 installed and the pressure increase ratio i of the pressure booster 2 and the two pressure values PH1 or PH2 is previously determined. When it is within the set allowable error γ, it is determined that the processing pressure is a normal value. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 of the pressure gauge exceeds the allowable error α of the auto frittering processing pressure, Alternatively, and / or when the absolute value of ΔP2 exceeds the allowable error γ, the processing pressure is determined as an abnormal value.
 第4の方法は、前記2台の圧力センサーP1、P2の計測値PH1とPH2の差ΔPの絶対値が、予め設定された処理圧力の許容誤差α内にあり、かつ、前記増圧器2と管外径計測式センサー4の計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された許容誤差δを超える時は、処理圧力を異常値と判定する方法。 In the fourth method, the absolute value of the difference ΔP between the measured values PH1 and PH2 of the two pressure sensors P1 and P2 is within a preset processing pressure tolerance α, and the pressure booster 2 and When the absolute value of the difference ΔP3 between the pipe outer diameter measurement pressure value PD converted from the measurement value of the pipe outer diameter measurement sensor 4 and the two pressure values PH1 or PH2 is within the preset allowable error δ The processing pressure is determined to be a normal value, and on the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, or / and the two pressure values PH1 or PH2 and the pipe outer diameter are measured. A method of determining the processing pressure as an abnormal value when the absolute value of the difference ΔP3 from the expression pressure value PD exceeds a preset allowable error δ.
 第5の方法は、前記2台の圧力センサーP1、P2の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記低圧側圧力計5の低圧圧力値PL と増圧器2の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時、更に、前記増圧器2と管外径計測式センサー4の計測値より換算した管外径計測式圧力値PD と予め設定された所定のオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と予め設定された所定のオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力を異常値と判定する方法。 The fifth method is that the absolute value of the difference ΔP between the measured values PH1 and PH2 of the two pressure sensors P1 and P2 is within a preset tolerance α and the low pressure of the low pressure side pressure gauge 5 is low. When the absolute value of the difference ΔP2 between the evaluation value PE calculated from the pressure value PL and the pressure increase ratio i of the intensifier 2 and the two pressure values PH1 or PH2 is within a preset allowable error γ, Further, the absolute value of the difference ΔP4 between the pipe outer diameter measurement type pressure value PD converted from the measured values of the pressure intensifier 2 and the pipe outer diameter measurement type sensor 4 and the predetermined auto-fretting processing pressure value PAF set in advance. When it is within the preset allowable error ε, the processing pressure is determined as a normal value. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the two The absolute value of the difference ΔP2 between the pressure value PH1 or PH2 and the evaluation pressure PE exceeds a preset allowable error γ. Or / and when the absolute value of the difference ΔP4 between the pipe outer diameter measuring pressure value PD and the predetermined auto-fretting treatment pressure value PAF set in advance exceeds a preset allowable error ε, A method of determining a processing pressure as an abnormal value.
 次に、上記オートフレッタージ処理圧力の検出方法を用いた高圧燃料配管のオートフレッタージ処理方法を図6~図10に基づいて説明する。
 図6に示すオートフレッタージ処理方法は、図3に示す高圧燃料配管のオートフレッタージ処理装置において、高圧燃料噴射管1-1又はコモンレール1-2内に増圧器2にて高圧に昇圧して所定のオートフレッタージ処理圧力を付与し、前記2台の圧力センサーP1、P2からなる圧力計3にてその処理圧力を検出してオートフレッタージ処理を施す際に、前記2台の圧力センサーP1、P2にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内の時は処理圧力を正常値と判定し、正常運転表示ランプを点灯させると同時にオートフレッタージ処理を継続する。他方、前記2つの圧力値の差ΔPの絶対値が前記許容誤差αを超える時はオートフレッタージ処理圧力は異常値と判定し、圧力計異常アラームを作動させると同時にオートフレッタージ処理を停止する。
Next, an auto-fretting process method for high-pressure fuel pipes using the auto-fretting process pressure detection method will be described with reference to FIGS.
The auto-fretting process method shown in FIG. 6 is performed by increasing the pressure in the high-pressure fuel injection pipe 1-1 or common rail 1-2 by the pressure booster 2 in the high-pressure fuel pipe auto-fretting process apparatus shown in FIG. When applying a predetermined auto-fretting process pressure and detecting the process pressure by the pressure gauge 3 composed of the two pressure sensors P1, P2, the two pressure sensors P1 are used. When the absolute value of the difference ΔP between the two pressure values PH1 and PH2 measured at P2 is within a preset tolerance α, the processing pressure is determined to be a normal value and the normal operation display lamp is turned on. At the same time, auto fretting is continued. On the other hand, when the absolute value of the difference ΔP between the two pressure values exceeds the allowable error α, it is determined that the auto-fretting process pressure is an abnormal value, and the auto-fretting process is stopped at the same time as the pressure gauge abnormality alarm is activated. .
 図7に示すオートフレッタージ処理方法は、図3に示す高圧燃料配管のオートフレッタージ処理装置において、前記2台の圧力センサーP1、P2にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その予め設定された所定のオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔP1の絶対値が、予め設定された許容誤差β内の時は処理圧力は正常値と判定し、正常運転表示ランプを点灯させると同時にオートフレッタージ処理を継続する。他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定された所定のオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔPの絶対値が予め設定された許容誤差βを超える時は、処理圧力は異常値と判定し、圧力計異常アラームを作動させると同時にオートフレッタージ処理を停止する。 The auto-fretting method shown in FIG. 7 is the difference ΔP between the two pressure values PH1 and PH2 measured by the two pressure sensors P1 and P2 in the auto-fretting processing device for high-pressure fuel piping shown in FIG. Is within a preset allowable error α, and the absolute value of the difference ΔP1 between the predetermined auto-fretting processing pressure value PAF set in advance and the measured value PH1 or PH2 of the pressure gauge is When it is within the preset allowable error β, the processing pressure is determined to be a normal value, and the normal operation display lamp is turned on, and at the same time, the auto-fretting process is continued. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, or / and the predetermined auto-fretting processing pressure value PAF set in advance and the measured value PH1 of the pressure gauge or When the absolute value of the difference ΔP with respect to PH2 exceeds a preset allowable error β, the processing pressure is determined to be an abnormal value, and a pressure gauge abnormality alarm is activated, and at the same time, the auto fretting process is stopped.
 図8に示すオートフレッタージ処理方法は、図4に示す高圧燃料配管のオートフレッタージ処理装置において、前記2台の圧力センサーP1、P2にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器2の上流側に設置した低圧側圧力計5の低圧圧力値PL と前記増圧器2の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が、予め設定された許容誤差γ内の時は処理圧力は正常値と判定し、正常運転表示ランプを点灯させると同時にオートフレッタージ処理を継続する。他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時は、処理圧力は異常値と判定し、圧力計異常アラームを作動させると同時にオートフレッタージ処理を停止する。 8 is the difference ΔP between the two pressure values PH1 and PH2 measured by the two pressure sensors P1 and P2 in the high-pressure fuel pipe auto-fretting processing apparatus shown in FIG. Is within the preset allowable error α, and is calculated from the low pressure value PL of the low pressure side pressure gauge 5 installed upstream of the pressure booster 2 and the pressure increase ratio i of the pressure booster 2. When the absolute value of the difference ΔP2 between the evaluation pressure PE and the two pressure values PH1 or PH2 is within the preset allowable error γ, the processing pressure is determined to be a normal value, and a normal operation display lamp At the same time as is turned on, auto-fretting is continued. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE is set in advance. If the allowable error γ is exceeded, the processing pressure is determined to be an abnormal value, and the pressure gauge abnormality alarm is activated, and at the same time, the auto fretting process is stopped.
 図9に示すオートフレッタージ処理方法は、図5に示す高圧燃料配管のオートフレッタージ処理装置において、前記2台の圧力センサーP1、P2にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定されたオートフレッタージ処理圧力の許容誤差α内にあり、かつ、前記増圧器2と管外径計測式センサー4の計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は、処理圧力は正常値と判定し、正常運転表示ランプを点灯させると同時にオートフレッタージ処理を継続する。他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された許容誤差δを超える時は、処理圧力は異常値と判定し、圧力計異常アラームを作動させると同時にオートフレッタージ処理を停止する。 The auto-fretting process method shown in FIG. 9 is the difference ΔP between the two pressure values PH1 and PH2 measured by the two pressure sensors P1 and P2 in the auto-fretting process apparatus for high-pressure fuel piping shown in FIG. Is within the preset allowable error α of the auto-fretting treatment pressure, and the pipe outer diameter measuring pressure value PD converted from the measured values of the pressure intensifier 2 and the pipe outer diameter measuring sensor 4. When the absolute value of the difference ΔP3 between the two pressure values PH1 or PH2 is within a preset tolerance δ, the processing pressure is determined to be a normal value, and the normal operation display lamp is turned on and at the same time the auto Continue the Taj process. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, or / and the difference ΔP3 between the two pressure values PH1 or PH2 and the pipe outer diameter measuring pressure value PD. When the absolute value exceeds the preset allowable error δ, it is determined that the processing pressure is an abnormal value, and the pressure gauge abnormality alarm is activated, and at the same time, the auto frittering process is stopped.
 図10に示すオートフレッタージ処理方法は、図1、図2に示す高圧燃料配管のオートフレッタージ処理装置において、前記2台の圧力センサーP1、P2にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記低圧側圧力計5の低圧圧力値PL と前記増圧器2の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内にあり、更に、前記管外径計測式センサー4の計測値より換算した管外径計測式圧力値PD と予め設定された所定のオートフレッタージ圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は、処理圧力は正常値と判定し、正常運転表示ランプを点灯させると同時にオートフレッタージ処理を継続する。他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と所定の圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力は異常値と判定し、圧力計異常アラームを作動すると同時にオートフレッタージ処理を停止する。 The auto-fretting process method shown in FIG. 10 is the same as the auto-fretting process device for high-pressure fuel pipes shown in FIGS. 1 and 2, but the two pressure values PH1 and PH2 measured by the two pressure sensors P1 and P2. The absolute value of the difference ΔP is within an allowable error α set in advance, and the evaluation pressure obtained by calculating from the low pressure value PL の of the low pressure gauge 5 and the pressure increase ratio i of the pressure booster 2 The absolute value of the difference ΔP2 between PE and the two pressure values PH1 or PH2 is within a preset tolerance γ, and the pipe outer diameter measurement converted from the measured value of the pipe outer diameter measuring sensor 4. When the absolute value of the difference ΔP4 between the formula pressure value PD and the predetermined auto fretted pressure value PAF set in advance is within the preset allowable error ε, the processing pressure is determined to be a normal value, and the normal operation display lamp At the same time as turning on To continue. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE is set in advance. If the absolute value of the difference ΔP4 between the pipe outer diameter measurement type pressure value PD and the predetermined pressure value PAF exceeds the preset allowable error ε, the processing pressure is exceeded. Is determined to be an abnormal value, the pressure gauge abnormality alarm is activated, and at the same time, the auto fretting process is stopped.
 上記のごとく、本発明方法によれば、オートフレッタージ処理中に処理圧力の正常もしくは異常を速やかに判断できるので、能率良く処理作業を行い得ると共に、処理圧力が異常と判断された場合にはオートフレッタージ処理装置の運転を即時に停止することができ、ワーク(燃料噴射管1-1、コモンレール1-2)を廃棄しなくて済む。 As described above, according to the method of the present invention, it is possible to quickly determine whether the processing pressure is normal or abnormal during the auto-fretting process, so that the processing operation can be performed efficiently and when the processing pressure is determined to be abnormal. The operation of the auto fritterage processing apparatus can be stopped immediately, and the work (fuel injection pipe 1-1, common rail 1-2) need not be discarded.
 図3に示す高圧燃料配管のオートフレッタージ処理装置と図6に示す高圧燃料配管のオートフレッタージ処理方法による実施例を以下に示す。
 本実施例1では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10000bar、圧力センサーP2の圧力値PH2=10100bar、2つの圧力値PH1とPH2の差ΔPの絶対値は100barであった。一方、予め設定された本実施例における処理圧力の許容誤差αは500barである。したがって、前記2つの圧力値PH1とPH2の差ΔPの絶対値である100barは前記許容誤差α内に入るため、オートフレッタージ処理圧力は正常値と判断し、オートフレッタージ処理はそのまま継続した。
 他方、別の計測では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10300bar、圧力センサーP2の圧力値PH1=9750bar、2つの圧力値PH1とPH2の差ΔPの絶対値は550barであった。したがって、この2つの圧力値PH1とPH2の差ΔPの絶対値は、前記許容誤差αの500barを超えるため、オートフレッタージ処理圧力は異常値と判断し、オートフレッタージ処理を即時停止した。
Examples of the auto-fretting treatment apparatus for high-pressure fuel piping shown in FIG. 3 and the auto-fretting treatment method for high-pressure fuel piping shown in FIG. 6 will be described below.
In the first embodiment, the pressure measured by the pressure gauge 3 including the two pressure sensors P1 and P2 is the pressure value PH1 = 10000 bar of the pressure sensor P1, the pressure value PH2 of the pressure sensor P2 = 10100 bar, The absolute value of the difference ΔP between the pressure values PH1 and PH2 was 100 bar. On the other hand, the allowable error α of the processing pressure in the present example set in advance is 500 bar. Therefore, since 100 bar, which is the absolute value of the difference ΔP between the two pressure values PH1 and PH2, falls within the allowable error α, the auto-fretting process pressure is determined to be a normal value, and the auto-fretting process is continued.
On the other hand, in another measurement, the pressure measured by the pressure gauge 3 composed of the two pressure sensors P1 and P2 is the pressure value PH1 = 10300 bar of the pressure sensor P1, the pressure value PH1 of the pressure sensor P2 is 9750 bar, 2 The absolute value of the difference ΔP between the two pressure values PH1 and PH2 was 550 bar. Therefore, the absolute value of the difference ΔP between the two pressure values PH1 and PH2 exceeds the allowable error α of 500 bar. Therefore, the auto-fretting process pressure was determined to be an abnormal value, and the auto-fretting process was immediately stopped.
 図3に示す高圧燃料配管のオートフレッタージ処理装置と図7に示す高圧燃料配管のオートフレッタージ処理方法による実施例を以下に示す。
 本実施例2では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=9950bar、圧力センサーP2の圧力値PH2=10100bar、2つの圧力値PH1とPH2の差ΔPの絶対値は150barであった。一方、予め設定された本実施例における許容誤差αは500barであるから、前記2つの圧力値PH1とPH2の差ΔPの絶対値150barは前記許容誤差α内に入るため、この時点におけるオートフレッタージ処理圧力は正常値と判断した。次に、予め設定された所定のオートフレッタージ圧力値PAF10000barと、前記2つの圧力値PH1又はPH2との差ΔP1の絶対値を求め、この差が予め設定された許容誤差βの250barの範囲内であるか否かを判定したところ、PAFとPH1の差ΔP1の絶対値は50bar、PAFとPH2の差ΔP1の絶対値は100barであるから、オートフレッタージ処理圧力は正常値と判断し、オートフレッタージ処理はそのまま継続した。
 他方、別の計測では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10000bar、圧力センサーP2の圧力値PH2=10300bar、2つの圧力値PH1とPH2の差ΔPの絶対値は300barであった。したがって、前記2つの圧力値PH1とPH2の差ΔPの絶対値は300barであって、前記許容誤差αの500bar内に入るため、この時点におけるオートフレッタージ処理圧力は正常値と判断した。次に、予め設定された所定のオートフレッタージ処理圧力値PAF10000barと、前記2つの圧力値PH1又はPH2との差を求めた結果、PAFとPH1の差は0bar、PAFとPH2の差は-300barとなり、PAFとPH2の差ΔP1の絶対値が許容誤差βの250barを外れるため、オートフレッタージ処理圧力は異常値と判断し、オートフレッタージ処理を即時停止した。
An embodiment of the auto-fretting treatment apparatus for high-pressure fuel piping shown in FIG. 3 and the auto-fretting treatment method for high-pressure fuel piping shown in FIG. 7 will be described below.
In the second embodiment, the pressures measured by the pressure gauge 3 including the two pressure sensors P1 and P2 are the pressure value PH1 of the pressure sensor P1 = 9950 bar, the pressure value PH2 of the pressure sensor P2 is 10100 bar, The absolute value of the difference ΔP between the pressure values PH1 and PH2 was 150 bar. On the other hand, since the preset allowable error α in the present embodiment is 500 bar, the absolute value 150 bar of the difference ΔP between the two pressure values PH1 and PH2 falls within the allowable error α. The processing pressure was judged to be a normal value. Next, an absolute value of a difference ΔP1 between a predetermined auto-fretting pressure value PAF10000bar set in advance and the two pressure values PH1 or PH2 is obtained, and this difference is within a range of 250 bar of a preset allowable error β. When the absolute value of the difference ΔP1 between PAF and PH1 is 50 bar and the absolute value of the difference ΔP1 between PAF and PH2 is 100 bar, the auto-fretting process pressure is determined to be a normal value. Fretage processing continued.
On the other hand, in another measurement, the pressure measured by the pressure gauge 3 composed of the two pressure sensors P1 and P2 is the pressure value PH1 = 10000 bar of the pressure sensor P1, and the pressure value PH2 = 10300 bar of the pressure sensor P2, respectively. The absolute value of the difference ΔP between the two pressure values PH1 and PH2 was 300 bar. Therefore, since the absolute value of the difference ΔP between the two pressure values PH1 and PH2 is 300 bar and falls within 500 bar of the allowable error α, it is determined that the auto-fretting process pressure at this time is a normal value. Next, as a result of obtaining a difference between a predetermined auto-fretting treatment pressure value PAF10000 bar and the two pressure values PH1 or PH2, the difference between PAF and PH1 is 0 bar, and the difference between PAF and PH2 is −300 bar. Thus, since the absolute value of the difference ΔP1 between PAF and PH2 deviates from the allowable error β of 250 bar, the auto-fretting process pressure was determined to be an abnormal value, and the auto-fretting process was immediately stopped.
 図4に示す高圧燃料配管のオートフレッタージ処理装置と図8に示す高圧燃料配管のオートフレッタージ処理方法による実施例を以下に示す。
 本実施例3では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10100bar、圧力センサーP2の圧力値PH2=9950bar、2つの圧力値PH1とPH2の差ΔPの絶対値は150barであった。したがって、前記2つの圧力値PH1とPH2の差ΔPの絶対値150barは、前記許容誤差αの500bar内に入るため、この時点におけるオートフレッタージ処理圧力は正常値と判断した。次に、増圧器2(プランジャータイプ、増圧比i=40(一定)で、内蔵するストローセンサーでストロークを検知し、油温を検知して油の体積膨張を考慮することにより増圧状況を把握する)の上流側に設置した低圧側圧力計5の低圧圧力値PL と前記増圧器2の増圧比iとから演算して求めた評価圧PE =10000barと、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値と、予め設定された許容誤差γの250barとの差を求めた結果、PE とPH1の差ΔP2の絶対値は100bar、PE とPH2の差ΔP2の絶対値は50barとなり、どちらも許容誤差γの250bar内に入るため、オートフレッタージ処理圧力は正常値と判断し、オートフレッタージ処理はそのまま継続した。
 他方、別の計測では、低圧側圧力計5の低圧圧力値PL =250bar、PE=250bar×40=10000bar、PH1=9700barであった。したがって、PE -PH1=300barとなり、許容誤差γの250barを外れるため、オートフレッタージ処理圧力は異常値と判断し、オートフレッタージ処理を即時停止した。
Examples of the auto-fretting treatment apparatus for high-pressure fuel piping shown in FIG. 4 and the auto-fretting treatment method for high-pressure fuel piping shown in FIG. 8 will be described below.
In the third embodiment, the pressure measured by the pressure gauge 3 including the two pressure sensors P1 and P2 is the pressure value PH1 of the pressure sensor P1 = 10100 bar, the pressure value PH2 of the pressure sensor P2 is 9950 bar, The absolute value of the difference ΔP between the pressure values PH1 and PH2 was 150 bar. Accordingly, since the absolute value 150 bar of the difference ΔP between the two pressure values PH1 and PH2 falls within 500 bar of the allowable error α, it is determined that the auto-fretting process pressure at this time is a normal value. Next, with the pressure booster 2 (plunger type, pressure increase ratio i = 40 (constant), the stroke is detected by the built-in straw sensor, the oil temperature is detected and the volume expansion of the oil is taken into account. The evaluation pressure PE = 10000 bar calculated from the low pressure value PL of the low pressure side pressure gauge 5 installed upstream and the pressure increase ratio i of the pressure booster 2, and the two pressure values PH1 or PH2 As a result of obtaining the difference between the absolute value of the difference ΔP2 and the preset allowable error γ of 250 bar, the absolute value of the difference ΔP2 between PE and PH1 is 100 bar, and the absolute value of the difference ΔP2 between PE and PH2 is 50 bar. Since both fall within the allowable error γ of 250 bar, the auto-fretting process pressure was determined to be a normal value, and the auto-fretting process was continued as it was.
On the other hand, in another measurement, the low pressure value PL of the low pressure side pressure gauge 5 was 250 bar, PE was 250 bar × 40 = 10000 bar, and PH1 was 9700 bar. Accordingly, PE−PH1 = 300 bar, which is outside the allowable error γ of 250 bar. Therefore, the auto-fretting process pressure was determined to be an abnormal value, and the auto-fretting process was immediately stopped.
 図5に示す高圧燃料配管のオートフレッタージ処理装置と図9に示す高圧燃料配管のオートフレッタージ処理方法による実施例を以下に示す。なお、本実施例では、外径計測センサー4として、増圧器2から供給側管継手7Aまでの配管部に、オートフレッタージ処理圧付与時における内表面の応力が弾性変形範囲内に設定された直管状のメジャー部6(JIS SCM 435の削出品、焼入れ焼戻し熱処理、HV≧350)を設け、オートフレッタージ処理圧付与時の外径変化を高精度に計測し、換算する方式を採用した。外径計測センサー4のセンサー部には、株式会社キーエンス製のデジタル寸法測定器(形式:LS-7030(M)、測定範囲:0.3~30mm、繰返し位置精度:±0.15μm)を採用した。
 本実施例4では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10000bar、圧力センサーP2の圧力値PH2=10100bar、2つの圧力値PH1とPH2の差ΔPの絶対値は100barであった。したがって、前記2つの圧力値PH1とPH2の差ΔPの絶対値は100barであって、前記許容誤差αの500bar内に入るため、この時点におけるオートフレッタージ処理圧力は正常値と判断した。次に、前記管外径計測式センサー4の計測値より換算すると、管外径計測式圧力値PD =10150barとなり、この管外径計測式圧力値PD と前記2つの圧力値PH1又はPH2との差ΔP3の絶対値を求めた結果、それぞれ150bar、50barとなり、どちらも許容誤差δの250bar内に入るため、オートフレッタージ処理圧力は正常値と判断し、オートフレッタージ処理はそのまま継続した。
 他方、別の計測では、PH1=9850bar、PH2=10000bar、PH1とPH2の差ΔPの絶対値は150bar、管外径計測式圧力値PD と前記2つの圧力値PH1又はPH2との差ΔP3の絶対値は、それぞれ300bar、150barとなり、許容誤差δの250barを外れるため、オートフレッタージ処理圧力は異常値と判断し、オートフレッタージ処理を即時停止した。
An embodiment of the auto-fretting method for high-pressure fuel piping shown in FIG. 5 and the auto-fretting processing method for high-pressure fuel piping shown in FIG. 9 will be described below. In the present embodiment, as the outer diameter measuring sensor 4, the stress on the inner surface at the time of applying the auto frittering treatment pressure is set in the elastic deformation range in the pipe portion from the pressure intensifier 2 to the supply side pipe joint 7A. A straight tubular major section 6 (JIS SCM 435 cutting, quenching and tempering heat treatment, HV ≧ 350) was provided, and a method of measuring and converting the outer diameter change at the time of applying the auto-fretting treatment pressure with high accuracy was adopted. The sensor part of the outer diameter measuring sensor 4 employs a digital dimension measuring instrument manufactured by Keyence Corporation (model: LS-7030 (M), measuring range: 0.3 to 30 mm, repeatability: ± 0.15 μm) did.
In the fourth embodiment, the pressure measured by the pressure gauge 3 including the two pressure sensors P1 and P2 is the pressure value PH1 = 10000 bar of the pressure sensor P1, the pressure value PH2 of the pressure sensor P2 = 10100 bar, The absolute value of the difference ΔP between the pressure values PH1 and PH2 was 100 bar. Therefore, since the absolute value of the difference ΔP between the two pressure values PH1 and PH2 is 100 bar and falls within 500 bar of the allowable error α, the auto-fretting process pressure at this time is determined to be a normal value. Next, when converted from the measured value of the pipe outer diameter measuring sensor 4, the pipe outer diameter measuring pressure value PD = 10150 bar, and the pipe outer diameter measuring pressure value PD and the two pressure values PH1 or PH2 As a result of obtaining the absolute value of the difference ΔP3, it was 150 bar and 50 bar, respectively, and both were within the allowable error δ of 250 bar. Therefore, the auto-fretting process pressure was determined to be a normal value, and the auto-fretting process was continued as it was.
On the other hand, in another measurement, PH1 = 9850 bar, PH2 = 10000 bar, the absolute value of the difference ΔP between PH1 and PH2 is 150 bar, and the absolute value of the difference ΔP3 between the pipe outer diameter measuring pressure value PD and the two pressure values PH1 or PH2. The values were 300 bar and 150 bar, respectively, and were outside the allowable error δ of 250 bar. Therefore, the auto-fretting process pressure was determined to be an abnormal value, and the auto-fretting process was immediately stopped.
 図1、2に示す高圧燃料配管のオートフレッタージ処理装置と図10に示す高圧燃料配管のオートフレッタージ処理方法による実施例を以下に示す。
 本実施例は、前記実施例3(図8)と実施例4(図9)とを組み合わせた実施例であり、使用した増圧器2、外径計測センサー4及び直管状のメジャー部6はすべて前記実施例と同様であった。
 本実施例5では、2台の圧力センサーP1、P2からなる圧力計3にて計測された圧力が、それぞれ圧力センサーP1の圧力値PH1=10100bar、圧力センサーP2の圧力値PH2=9950bar、2つの圧力値PH1とPH2の差ΔPの絶対値は150barであった。したがって、前記2つの圧力値PH1とPH2の差ΔPの絶対値150barは前記許容誤差αの500bar内に入るため、この時点におけるオートフレッタージ処理圧力は正常値と判断した。次に、増圧器2(プランジャータイプ、増圧比i=40(一定)で、内蔵するストローセンサーでストロークを検知し、油温を検知して油の体積膨張を考慮することにより増圧状況を把握する)の上流側に設置した低圧側圧力計5の低圧圧力値PL と前記増圧器2の増圧比iとから演算して求めた評価圧PE =10000barと、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値と、予め設定された許容誤差γの250barとの差を求めた結果、PE とPH1の差ΔP2の絶対値は100bar、PE とPH2の差ΔP2の絶対値は50barとなり、どちらも許容誤差γの250bar内であった。さらに、前記管外径計測式センサー4の計測値より換算すると、管外径計測式圧力値PD =10150barとなり、この管外径計測式圧力値PD と予め設定された所定のオートフレッタージ圧力値PAF=10000barとの差ΔP4の絶対値を求めた結果、ΔP4の絶対値は150barとなり、予め設定された許容誤差εの300bar内に入るため、オートフレッタージ処理圧力は正常値と判断し、オートフレッタージ処理はそのまま継続した。
 他方、別の計測では、管外径計測式圧力値PD が9700barであり、予め設定された所定のオートフレッタージ圧力値PAF=10000barとの差ΔP4の絶対値が300barとなり、許容誤差εの250barを外れるため、オートフレッタージ処理圧力は異常値と判断し、オートフレッタージ処理を即時停止した。
Examples of the auto-fretting treatment apparatus for high-pressure fuel piping shown in FIGS. 1 and 2 and the auto-fretting treatment method for high-pressure fuel piping shown in FIG. 10 are shown below.
The present embodiment is an embodiment in which the third embodiment (FIG. 8) and the fourth embodiment (FIG. 9) are combined, and the intensifier 2, the outer diameter measuring sensor 4 and the straight tubular measure portion 6 used are all used. The same as in the previous example.
In the fifth embodiment, the pressure values measured by the pressure gauge 3 including the two pressure sensors P1 and P2 are the pressure value PH1 of the pressure sensor P1 = 10100 bar, the pressure value PH2 of the pressure sensor P2 is 9950 bar, The absolute value of the difference ΔP between the pressure values PH1 and PH2 was 150 bar. Accordingly, since the absolute value 150 bar of the difference ΔP between the two pressure values PH1 and PH2 falls within 500 bar of the allowable error α, it is determined that the auto-fretting process pressure at this time is a normal value. Next, with the pressure booster 2 (plunger type, pressure increase ratio i = 40 (constant), the stroke is detected by the built-in straw sensor, the oil temperature is detected and the volume expansion of the oil is taken into account. The evaluation pressure PE = 10000 bar calculated from the low pressure value PL of the low pressure side pressure gauge 5 installed upstream and the pressure increase ratio i of the pressure booster 2, and the two pressure values PH1 or PH2 As a result of obtaining the difference between the absolute value of the difference ΔP2 and the preset allowable error γ of 250 bar, the absolute value of the difference ΔP2 between PE and PH1 is 100 bar, and the absolute value of the difference ΔP2 between PE and PH2 is 50 bar. Both were within 250 bar of tolerance γ. Further, when converted from the measured value of the pipe outer diameter measuring sensor 4, the pipe outer diameter measuring pressure value PD = 10150 bar, and this pipe outer diameter measuring pressure value PD and a predetermined auto-fretting pressure value set in advance. As a result of obtaining the absolute value of the difference ΔP4 from PAF = 10000 bar, the absolute value of ΔP4 is 150 bar, which falls within the preset allowable error ε of 300 bar. Fretage processing continued.
On the other hand, in another measurement, the pipe outer diameter measurement type pressure value PD is 9700 bar, the absolute value of the difference ΔP4 from the predetermined autofretting pressure value PAF = 10000 bar is 300 bar, and the allowable error ε is 250 bar. Therefore, the auto-fretting process pressure was judged to be an abnormal value, and the auto-fretting process was immediately stopped.
 なお、上記実施例1~5は、高圧燃料配管(ワーク)として高圧燃料噴射管ののみのオートフレッタージ処理について示したが、コモンレールの場合も同様であることはいうまでもない。 In the first to fifth embodiments, the auto-fretting process using only the high-pressure fuel injection pipe as the high-pressure fuel pipe (work) has been described. Needless to say, the same applies to the common rail.
 本発明のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法及び該検出方法を用いたオートフレッタージ処理方法では、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にてオートフレッタージ処理圧力を計測するので、オートフレッタージ処理中に圧力計の故障を精度よく検知することができ、処理圧力の正常、異常を的確に判断することができる結果、処理圧力の不足や過剰を防止することでき、常に所望する圧力にて確実にかつ精度よくオートフレッタージ処理を施すことができる。更に、10000bar程度の超高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しなくても既存の圧力計や圧力センサーを用いて、超高圧のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理を施すことが可能となる。従って、本発明の圧力測定システムによれば、実使用時における製品(ワーク)の破損、あるいはオートフレッタージ処理中における製品(ワーク)の破損等の可能性はほとんどなくなり、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴うオートフレッタージ処理圧力の高圧化にも十分に対応することができる。
 又、本発明に係るオートフレッタージ処理装置は、圧力測定システム自体も比較的簡易であるのみならず、既存の圧力計、増圧器及び、管外径計測センサーを用い、コンピューターシステムと組み合わせて構成することができるので、コスト的にも安価につく上、オートフレッタージ処理中に圧力計の故障を検知することができ、処理圧力の正常、異常を的確に判断することができる結果、処理圧力の不足や過剰を防止することでき、常に所望する圧力にて確実にかつ精度よくオートフレッタージ処理を施すことができる。従って、本発明装置によれば、前記したように10000bar程度の超高圧下で十分な耐久性と繰返し精度が保証された圧力計や圧力センサーが存在しなくても既存の圧力計や圧力センサーを用いて、最近の超高圧のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理を能率良く施すことが可能となるので、最近のディーゼルエンジンにおける燃料噴射圧の高圧化に伴うオートフレッタージ処理圧力の高圧化にも十分に対応することができ、内圧疲労強度のより優れた高圧燃料配管の提供に大きく寄与し得る。
In a method for detecting a processing pressure in auto-fretting processing of a high-pressure fuel pipe for a diesel engine according to the present invention and an auto-fretting processing method using the detecting method, a pressure gauge for detecting the processing pressure is used as the high-pressure fluid circuit. At least two units are installed in the vicinity of the high-pressure fuel pipe on the downstream side of the fuel pipe, and the autofritterage processing pressure is measured by the at least two pressure gauges. As a result of being able to detect with high accuracy and accurately determining whether processing pressure is normal or abnormal, it is possible to prevent shortage or excess of processing pressure, and to always and reliably and accurately perform auto-fretting. Processing can be performed. Furthermore, even if there is no pressure gauge or pressure sensor that guarantees sufficient durability and repeatability under ultra high pressure of about 10,000 bar, high pressure fuel for ultra high pressure diesel engines using existing pressure gauges and pressure sensors. It is possible to perform auto-fretting of piping. Therefore, according to the pressure measurement system of the present invention, there is almost no possibility of damage to the product (work) during actual use, or damage to the product (work) during the auto-fretting process. It is possible to sufficiently cope with the increase in the auto-fretting process pressure accompanying the increase in the injection pressure.
In addition, the auto-fretage processing apparatus according to the present invention is not only a relatively simple pressure measurement system itself, but also uses an existing pressure gauge, a pressure intensifier, and a pipe outer diameter measurement sensor, and is configured in combination with a computer system. As a result, the pressure gauge can be detected during the auto fretting process, and the normal or abnormal process pressure can be accurately determined. Deficiency and excess can be prevented, and auto-fretting can be performed reliably and accurately at a desired pressure at all times. Therefore, according to the apparatus of the present invention, as described above, even if there is no pressure gauge or pressure sensor that guarantees sufficient durability and repeatability under an ultrahigh pressure of about 10000 bar, the existing pressure gauge or pressure sensor can be used. Therefore, it is possible to efficiently perform auto-fretting treatment of high-pressure fuel pipes for recent ultra-high-pressure diesel engines. Therefore, the high pressure of auto-fretting treatment pressure accompanying the increase in fuel injection pressure in recent diesel engines. It can sufficiently cope with the increase in the pressure and can greatly contribute to the provision of a high-pressure fuel pipe with better internal pressure fatigue strength.
1-1 高圧燃料噴射管
1-2 コモンレール
2 増圧器
3 圧力計、
4 外径計測式センサー
4-1 メジャー部
5 低圧側圧力計
6 配管部
7A 供給側管継手
7B 封止側管継手
7C シール部材
P1、P2 圧力センサー
1-1 High-pressure fuel injection pipe 1-2 Common rail 2 Intensifier 3 Pressure gauge,
4 Outer diameter measurement type sensor 4-1 Measure part 5 Low pressure side pressure gauge 6 Piping part 7A Supply side pipe joint 7B Sealing side pipe joint 7C Seal members P1, P2 Pressure sensor

Claims (16)

  1.  ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置の処理圧力を検出する方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にてオートフレッタージ処理圧力を計測することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 In a method for detecting a processing pressure of an auto-fretage processing device that applies auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine, a pressure gauge for detecting the processing pressure is provided in a high-pressure fluid circuit. A high-pressure fuel pipe for a diesel engine, wherein at least two units are installed in the vicinity of the high-pressure fuel pipe on the downstream side of the high-pressure fuel pipe, and the auto-fretting treatment pressure is measured by the at least two pressure gauges. For detecting the processing pressure in the auto-fretting process.
  2.  前記処理圧力を検出する圧力計を、前記高圧流体回路の前記高圧燃料配管の下流側の2台に加え、上流側にも少なくとも1台設置し、少なくとも3台の圧力計にてオートフレッタージ処理圧力を計測することを特徴とする請求項1に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 In addition to the two pressure gauges for detecting the processing pressure on the downstream side of the high-pressure fuel pipe in the high-pressure fluid circuit, at least one pressure gauge is installed on the upstream side, and auto-fretting processing is performed with at least three pressure gauges. The pressure is measured, The processing pressure detection method in the auto-fretting process of the high-pressure fuel piping for diesel engines of Claim 1 characterized by the above-mentioned.
  3.  前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内の時は処理圧力を正常値と判定し、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時は処理圧力を異常値と判定することを特徴とする請求項1または2に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 When the absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within a preset allowable error α, the processing pressure is determined as a normal value and the measurement is performed. 3. The auto fritterage of a high-pressure fuel pipe for a diesel engine according to claim 1, wherein when the absolute value of the difference ΔP between the values PH1 and PH2 exceeds the allowable error α, the processing pressure is determined as an abnormal value. Method for detecting processing pressure in processing.
  4.  前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その予め設定された処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が、予め設定された許容誤差β内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定された処理圧力値PAFと前記圧力計の計測値PH1またはPH2との差ΔP1の絶対値が予め設定された許容誤差βを超える時は、処理圧力を異常値と判定することを特徴とする請求項1ないし3のいずれか1項に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within the preset allowable error α, and the preset processing pressure value PAF When the absolute value of the difference ΔP1 between the measured pressure value PH1 or PH2 of the pressure gauge is within a preset allowable error β, the processing pressure is determined as a normal value, while the difference ΔP between the measured values PH1 and PH2 Or the absolute value of the difference ΔP1 between the preset processing pressure value PAF and the measured value PH1 or PH2 of the pressure gauge is a preset allowable error β. 4. The method for detecting a processing pressure in auto-fretting processing of a high-pressure fuel pipe for a diesel engine according to claim 1, wherein the processing pressure is determined as an abnormal value when the pressure exceeds.
  5.  前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時は処理圧力を正常値と判定し、他方、前記圧力計の計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記ΔP2の絶対値が許容誤差γを超える時は、処理圧力を異常値と判定することを特徴とする請求項1ないし3のいずれか1項に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within a preset allowable error α, and in the high-pressure fuel pipe for the diesel engine An evaluation pressure PE obtained by calculation from a low pressure value PL of a pressure gauge installed upstream of the pressure booster for applying a high processing pressure and a pressure increase ratio i of the pressure booster, and the two pressure values PH1 or PH2 When the absolute value of the difference ΔP2 is within the preset allowable error γ, the processing pressure is determined as a normal value, while the absolute value of the difference ΔP between the pressure gauge measured values PH1 and PH2 is the allowable error α. The diesel engine according to any one of claims 1 to 3, wherein the processing pressure is determined as an abnormal value when the absolute value of ΔP2 exceeds an allowable error γ. Pressure in auto fretting of high pressure fuel piping Force detection method.
  6.  前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と該高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された前記許容誤差δを超える時は、処理圧力を異常値と判定することを特徴とする請求項1ないし3のいずれか1項に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within a preset allowable error α, and in the high-pressure fuel pipe for the diesel engine The pipe outer diameter measurement type pressure value PD converted from the measurement value of the pipe outer diameter measurement type sensor provided in the straight pipe part between the intensifier for applying a high processing pressure and the high pressure fuel pipe, and the two pressures When the absolute value of the difference ΔP3 from the value PH1 or PH2 is within the preset allowable error δ, the processing pressure is determined as a normal value, while the absolute value of the difference ΔP between the measured values PH1 and PH2 is the allowable error. When α exceeds or / and when the absolute value of the difference ΔP3 between the two pressure values PH1 or PH2 and the pipe outer diameter measuring pressure value PD exceeds the preset allowable error δ, the processing pressure 4 is determined to be an abnormal value. Detection method of treatment pressure in the auto fretting Taj process of a high-pressure fuel pipe for diesel engines according to.
  7.  前記高圧燃料配管の下流側の少なくとも2台の圧力計の計測値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時、更に、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は処理圧力を正常値と判定し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された前記許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力を異常値と判定することを特徴とする請求項1ないし3のいずれか1項に記載のディーゼルエンジン用高圧燃料配管のオートフレッタージ処理における処理圧力の検出方法。 The absolute value of the difference ΔP between the measured values PH1 and PH2 of at least two pressure gauges on the downstream side of the high-pressure fuel pipe is within a preset allowable error α, and in the high-pressure fuel pipe for the diesel engine An evaluation pressure PE obtained by calculation from a low pressure value PL of a pressure gauge installed upstream of the pressure booster for applying a high processing pressure and a pressure increase ratio i of the pressure booster, and the two pressure values PH1 or PH2 When the absolute value of the difference ΔP2 is within the preset allowable error γ, the absolute value of the difference ΔP2 is further converted from the measured value of the pipe outer diameter measuring sensor provided in the straight pipe portion between the pressure intensifier and the high pressure fuel pipe. When the absolute value of the difference ΔP4 between the pipe outer diameter measuring pressure value PD and the preset auto-fretting process pressure value PAF is within the preset tolerance ε, the process pressure is determined as a normal value, When the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α Or / and when the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE exceeds the preset allowable error γ, and / or the pipe outer diameter measuring pressure value PD The processing pressure is determined to be an abnormal value when the absolute value of the difference ΔP4 between the auto-fretting processing pressure value PAF and the preset auto-fretting processing pressure value PAF exceeds a preset tolerance ε. A method for detecting a processing pressure in auto-fretting processing of a high-pressure fuel pipe for a diesel engine according to any one of the above.
  8.  ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が予め設定された許容誤差α内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記2つの圧力値の差ΔPの絶対値が前記許容誤差αを超える時は処理圧力を異常値と判定し、オートフレッタージ処理を停止することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法。 A high-pressure processing pressure is applied to a high-pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high-pressure fluid piping of the high-pressure fluid circuit to perform auto-fretting processing. In this method, at least two pressure gauges for detecting the processing pressure are installed in the vicinity of the high-pressure fuel pipe, and a difference ΔP between two pressure values PH1 and PH2 measured by the at least two pressure gauges. When the absolute value is within the preset allowable error α, the processing pressure is determined to be a normal value and the auto-fretting process is continued. On the other hand, the absolute value of the difference ΔP between the two pressure values is the allowable error α. When the pressure exceeds the value, the processing pressure is judged to be an abnormal value, and the auto-fretting process is stopped.
  9.  ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、その予め設定されたオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔP1の絶対値が、予め設定された許容誤差β内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記予め設定されたオートフレッタージ処理圧力値PAFと前記圧力計の計測値PH1又はPH2との差ΔPの絶対値が予め設定された許容誤差βを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法。 A high-pressure processing pressure is applied to a high-pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high-pressure fluid piping of the high-pressure fluid circuit to perform auto-fretting processing. In the application method, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the vicinity of the high-pressure fuel pipe and measured by the at least two pressure gauges. The absolute value of the difference ΔP between the two pressure values PH1 and PH2 is within a preset allowable error α, and the preset auto-fretting processing pressure value PAF and the measured value PH1 of the pressure gauge Alternatively, when the absolute value of the difference ΔP1 from the PH2 is within the preset allowable error β, the processing pressure is determined to be a normal value, and the auto-fretting process is continued. On the other hand, the difference ΔP between the measured values PH1 and PH2 The absolute value of When the error α is exceeded, or / and when the absolute value of the difference ΔP between the preset autofretting processing pressure value PAF and the pressure gauge measured value PH1 or PH2 exceeds a preset allowable error β Is a method for automatically treating a high-pressure fuel pipe for a diesel engine, wherein the processing pressure is determined to be an abnormal value, and the auto-frittering process is stopped.
  10.  ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された許容誤差γを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法。 A high-pressure processing pressure is applied to a high-pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high-pressure fluid piping of the high-pressure fluid circuit to perform auto-fretting processing. In the application method, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the vicinity of the high-pressure fuel pipe and measured by the at least two pressure gauges. The absolute value of the difference ΔP between the two pressure values PH1 and PH2 is within a preset tolerance α, and the low pressure value PL of the pressure gauge installed upstream of the pressure booster and the pressure booster When the absolute value of the difference ΔP2 between the evaluation pressure PE calculated from the pressure increase ratio i and the two pressure values PH1 or PH2 is within a preset allowable error γ, the processing pressure is determined to be a normal value. And continue the auto frittering process, On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the absolute value of the difference ΔP2 between the two pressure values PH1 or PH2 and the evaluation pressure PE is set in advance. When the permissible error γ is exceeded, the processing pressure is determined to be an abnormal value, and the auto-fretting process is stopped.
  11.  ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と、前記2つの圧力値PH1またはPH2との差ΔP3の絶対値が予め設定された許容誤差δ内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記管外径計測式圧力値PD との差ΔP3の絶対値が予め設定された許容誤差δを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法。 A high-pressure processing pressure is applied to a high-pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high-pressure fluid piping of the high-pressure fluid circuit to perform auto-fretting processing. In the application method, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the vicinity of the high-pressure fuel pipe and measured by the at least two pressure gauges. The absolute value of the difference ΔP between the two pressure values PH1 and PH2 is within a preset tolerance α, and the pipe outer diameter provided in the straight pipe portion between the pressure intensifier and the high pressure fuel pipe The processing pressure is normal when the absolute value of the difference ΔP3 between the pipe outer diameter measurement type pressure value PD converted from the measurement value of the measurement type sensor and the two pressure values PH1 or PH2 is within the preset allowable error δ. Judged as a value and auto-fretting processing On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, or / and the two pressure values PH1 or PH2 and the pipe outer diameter measuring pressure value PD When the absolute value of the difference ΔP3 exceeds a preset allowable error δ, the processing pressure is judged to be an abnormal value, and the auto-fretting process is stopped. Processing method.
  12.  ディーゼルエンジン用高圧燃料配管内に増圧器にて高圧の処理圧力を付与し、該高圧流体回路の前記高圧燃料配管の下流側に設置した圧力計にて処理圧力を検出してオートフレッタージ処理を施す方法において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台設置し、前記少なくとも2台の圧力計にて計測された2つの圧力値PH1とPH2の差ΔPの絶対値が、予め設定された許容誤差α内にあり、かつ、前記増圧器の上流側に設置した圧力計の低圧圧力値PL と該増圧器の増圧比iとから演算して求めた評価圧PE と、前記2つの圧力値PH1又はPH2との差ΔP2の絶対値が予め設定された許容誤差γ内にあり、更に、前記増圧器と高圧燃料配管との間の直管部に設けた管外径計測式センサーの計測値より換算した管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差ε内の時は処理圧力を正常値と判定し、オートフレッタージ処理を継続し、他方、前記計測値PH1とPH2の差ΔPの絶対値が前記許容誤差αを超える時、又は/及び、前記2つの圧力値PH1又はPH2と前記評価圧PE との差ΔP2の絶対値が予め設定された前記許容誤差γを超える時、又は/及び、前記管外径計測式圧力値PD と予め設定されたオートフレッタージ処理圧力値PAFとの差ΔP4の絶対値が予め設定された許容誤差εを超える時は、処理圧力を異常値と判定し、オートフレッタージ処理を停止することを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理方法。 A high-pressure processing pressure is applied to a high-pressure fuel pipe for a diesel engine by a pressure intensifier, and the processing pressure is detected by a pressure gauge installed on the downstream side of the high-pressure fluid piping of the high-pressure fluid circuit to perform auto-fretting processing. In the application method, at least two pressure gauges for detecting the processing pressure are installed on the downstream side of the high-pressure fuel pipe in the vicinity of the high-pressure fuel pipe and measured by the at least two pressure gauges. The absolute value of the difference ΔP between the two pressure values PH1 and PH2 is within a preset tolerance α, and the low pressure value PL of the pressure gauge installed upstream of the pressure booster and the pressure booster The absolute value of the difference ΔP2 between the evaluation pressure PE calculated from the pressure increase ratio i and the two pressure values PH1 or PH2 is within a preset tolerance γ, and the pressure booster and the high pressure Outside the pipe provided in the straight pipe between the fuel pipe Processing is performed when the absolute value of the difference ΔP4 between the pipe outer diameter measurement pressure value PD converted from the measurement value of the diameter measurement sensor and the preset auto-fretting process pressure value PAF is within the preset allowable error ε. The pressure is determined to be a normal value and the auto-fretting process is continued. On the other hand, when the absolute value of the difference ΔP between the measured values PH1 and PH2 exceeds the allowable error α, and / or the two pressure values PH1 or When the absolute value of the difference ΔP2 between PH2 and the evaluation pressure PE exceeds the preset allowable error γ, or / and the pipe outer diameter measuring pressure value PD and the preset auto-fretting processing pressure value When the absolute value of the difference ΔP4 from the PAF exceeds a preset allowable error ε, the processing pressure is determined to be an abnormal value, and the auto-fretting process is stopped. Fretage processing method .
  13.  ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と前記高圧燃料配管との間に設けた、所定の処理圧力付与時における内表面の応力が弾性変形範囲内に設定された直管部に、処理圧力付与時の外径変化を計測する管外径計測式センサーを有し、前記少なくとも2台の圧力計と、前記管外径計測式センサーの各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理装置。 A pressure gauge for detecting the processing pressure is provided on a downstream side of the high-pressure fuel pipe in a high-pressure fluid circuit in an auto-fretage processing apparatus that performs auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine. A predetermined processing pressure provided between the high-pressure fuel pipe and a pressure intensifier for providing a high-pressure processing pressure in the high-pressure fuel pipe for a diesel engine. The straight pipe portion in which the stress of the inner surface at the time of application is set within the elastic deformation range has a pipe outer diameter measuring sensor for measuring the outer diameter change at the time of applying the processing pressure, and the at least two pressure gauges And a mechanism for detecting the auto-fretting treatment pressure based on each measurement value of the pipe outer diameter measuring type sensor, and whether the auto-fretting treatment pressure is normal or abnormal. Auto fretting Taj processing apparatus of a high-pressure fuel pipe for diesel engines, characterized in that no configured to include a detection means for dynamically displayed.
  14.  ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、前記少なくとも2台の圧力計の各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理装置。 A pressure gauge for detecting the processing pressure is provided on a downstream side of the high-pressure fuel pipe in a high-pressure fluid circuit in an auto-fretage processing apparatus that performs auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine. At least two units close to the high-pressure fuel pipe, and a mechanism for detecting the auto-fretting process pressure based on the measured values of the at least two pressure gauges, and the auto-fretting process pressure is normal or An auto-fretting treatment apparatus for high-pressure fuel piping for a diesel engine, characterized by comprising a detecting means for automatically displaying an abnormality.
  15.  ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記増圧器の上流側に少なくとも1台の低圧側圧力計を備え、前記少なくとも2台の圧力計と、前記少なくとも1台の低圧側圧力計の各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理装置。 A pressure gauge for detecting the processing pressure is provided on a downstream side of the high-pressure fuel pipe in a high-pressure fluid circuit in an auto-fretage processing apparatus that performs auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine. And at least two low pressure side pressure gauges on the upstream side of the pressure intensifier, the at least two pressure gauges, and the at least one low pressure side. There is no mechanism for detecting the auto-fretting treatment pressure based on each measurement value of the pressure gauge, and there is a configuration provided with detection means for automatically displaying normality or abnormality of the auto-fretting treatment pressure. Auto-fretting treatment equipment for high-pressure fuel piping for diesel engines.
  16.  ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与してオートフレッタージ処理を施すオートフレッタージ処理装置において、前記処理圧力を検出する圧力計を、高圧流体回路の前記高圧燃料配管の下流側に該高圧燃料配管に近接して少なくとも2台備え、更に、前記ディーゼルエンジン用高圧燃料配管内に高圧の処理圧力を付与する増圧器と前記高圧燃料配管との間に設けた、所定処理圧力付与時における内表面の応力が弾性変形範囲内に設定された直管部に、処理圧力付与時の外径変化を計測する管外径計測式センサーを有し、更に又、前記増圧器の上流側に少なくとも1台の低圧側圧力計を備え、前記高圧燃料配管の下流側の少なくとも2台の圧力計と、前記増圧器の上流側の少なくとも1台の低圧側圧力計の各計測値、及び、前記管外径計測式センサーの各計測値に基づいてオートフレッタージ処理圧力を検出する仕組みとなし、かつ前記オートフレッタージ処理圧力の正常又は異常を自動的に表示する検知手段を備えた構成となしたことを特徴とするディーゼルエンジン用高圧燃料配管のオートフレッタージ処理装置。 A pressure gauge for detecting the processing pressure is provided on a downstream side of the high-pressure fuel pipe in a high-pressure fluid circuit in an auto-fretage processing apparatus that performs auto-fretting processing by applying a high processing pressure to a high-pressure fuel pipe for a diesel engine. A predetermined processing pressure is provided between the high-pressure fuel pipe and the intensifier for applying a high-pressure processing pressure to the diesel engine high-pressure fuel pipe. A straight pipe portion in which the stress of the inner surface at the time is set within the elastic deformation range, and has a pipe outer diameter measuring sensor for measuring the outer diameter change at the time of applying the processing pressure, and further upstream of the pressure intensifier Each of the measured values of at least two pressure gauges on the downstream side of the high pressure fuel pipe and at least one low pressure gauge on the upstream side of the pressure intensifier, And a mechanism for detecting the auto-fretting treatment pressure based on each measurement value of the pipe outer diameter measuring sensor, and a detecting means for automatically displaying normality or abnormality of the auto-fretting treatment pressure. An auto-fretting device for high-pressure fuel piping for diesel engines, characterized in that it is configured.
PCT/JP2009/062336 2008-08-11 2009-07-07 Method of detecting treatment pressure in autofrettage treatment of high-pressure fuel pipe for diesel engine and method and device for autofrettage treatment using the detecting method WO2010018721A1 (en)

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