JP5867191B2 - Evaluation method of spring material for connector terminals - Google Patents
Evaluation method of spring material for connector terminals Download PDFInfo
- Publication number
- JP5867191B2 JP5867191B2 JP2012055597A JP2012055597A JP5867191B2 JP 5867191 B2 JP5867191 B2 JP 5867191B2 JP 2012055597 A JP2012055597 A JP 2012055597A JP 2012055597 A JP2012055597 A JP 2012055597A JP 5867191 B2 JP5867191 B2 JP 5867191B2
- Authority
- JP
- Japan
- Prior art keywords
- residual stress
- stress
- spring material
- rate
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
本発明は、コネクタ端子のばね接点に用いられる材料の耐久性を評価する方法に関するものである。 The present invention relates to a method for evaluating the durability of a material used for a spring contact of a connector terminal.
従来、自動車等の内部配線は、エレクトロニクス設備を正確に作動させるため、複数の電線をまとめたワイヤーハーネスの形態で使用されている。ワイヤーハーネスの接続には、コネクタ端子が用いられる。コネクタ端子は、オス端子と該オス端子が嵌合するメス端子とから構成されている。一般にメス端子は、ばね性を有する金属板材が曲げ加工されて形成された接点部を備えている。メス端子は、接点部がばね力によりオス端子の接点部に押し付けられる。 Conventionally, internal wiring of automobiles and the like has been used in the form of a wire harness in which a plurality of electric wires are collected in order to accurately operate electronic equipment. Connector terminals are used to connect the wire harness. The connector terminal is composed of a male terminal and a female terminal into which the male terminal is fitted. In general, the female terminal includes a contact portion formed by bending a metal plate having a spring property. The contact portion of the female terminal is pressed against the contact portion of the male terminal by a spring force.
メス端子の接点部の材料を選択する場合、メス端子の接点部とオス端子の接点部で良好な導通を図るために、十分なばね性が要求される。更に、コネクタ端子は、耐久試験後に所定のばね性を有している必要がある。耐久試験は、通常、１００〜２００℃程度で１０００時間〜２０００時間程度の加熱処理が施される。そのためコネクタ端子用ばね材料の選択には、耐熱評価が必要である。 When selecting the material of the contact portion of the female terminal, sufficient springiness is required in order to achieve good conduction between the contact portion of the female terminal and the contact portion of the male terminal. Furthermore, the connector terminal needs to have a predetermined spring property after the durability test. In the durability test, heat treatment is usually performed at about 100 to 200 ° C. for about 1000 hours to 2000 hours. Therefore, heat resistance evaluation is required for selection of the connector terminal spring material.
そこで、コネクタ端子用ばね材料の耐熱評価は、応力緩和率の測定により行っていた。応力緩和率は、例えば、下記の非特許文献１に記載の方法で測定することができる。
Therefore, the heat resistance evaluation of the connector terminal spring material was performed by measuring the stress relaxation rate. The stress relaxation rate can be measured, for example, by the method described in
特許文献１に記載の試験方法は、薄板条の試験片を高温に放置した後に増加する永久ひずみを、所定の経過時間後にたわみ変位を測定し、初期応力並びに初期ひずみから応力緩和を算出するものである。
The test method described in
従来、コネクタ端子用ばね材料を選択、探索する場合、応力緩和率を測定し、その結果に基づいて所定の応力緩和率以下（所定の残存応力率以上）の範囲となる材料を選択していた。しかしながら、コネクタは、オス端子とメス端子の間で十分な接触荷重を得ることができれば十分である。すなわち、耐久後の応力低下が大きく、残存応力率が小さくなったとしても、所定のばねとしての応力（絶対値）を有していれば、使用することが可能なはずである。 Conventionally, when selecting and searching for a connector terminal spring material, the stress relaxation rate is measured, and based on the result, a material that falls within a predetermined stress relaxation rate range (a predetermined residual stress rate or more) is selected. . However, it is sufficient if the connector can obtain a sufficient contact load between the male terminal and the female terminal. That is, even if the stress drop after endurance is large and the residual stress rate is small, it should be possible to use it as long as it has a predetermined spring stress (absolute value).
つまり、従来のコネクタ端子用の評価方法では、耐久後でも所定のばね性を有しているにもかかわらず、応力緩和率が大きい材料は、選択から除外されることになっていた。 That is, in the conventional evaluation method for connector terminals, a material having a high stress relaxation rate is excluded from selection even though it has a predetermined spring property even after durability.
本発明は上記従来技術の欠点を解決しようとするものであり、コネクタ端子に用いられるばね材料として使用可能なばね性をより適切に評価することができるコネクタ端子用ばね材料の評価方法を提供することを目的とする。 The present invention is intended to solve the above-mentioned drawbacks of the prior art, and provides a method for evaluating a spring material for a connector terminal that can more appropriately evaluate the spring property that can be used as a spring material used for a connector terminal. For the purpose.
上記課題を解決するために本発明のコネクタ端子用ばね材料の評価方法は、
コネクタ端子に用いられるばね材料を評価する方法において、
予め基準となる基準ばね材料の初期の耐力と、耐熱試験後の残存応力率を測定し、前記耐力と残存応力率の積で表わされる残存応力の値を基準残存応力値として、
評価しようとする被評価ばね材料の初期の耐力と、耐熱試験後の残存応力率を測定し、前記基準残存応力値と比較して、被評価ばね材料の可否を判別することを要旨とするものである。
In order to solve the above problems, the evaluation method of the spring material for connector terminals of the present invention is:
In a method for evaluating a spring material used for a connector terminal,
Measure the initial yield strength of the reference spring material as a reference in advance and the residual stress rate after the heat test, and use the residual stress value represented by the product of the yield strength and the residual stress rate as the reference residual stress value.
The gist is to measure the initial yield strength of the spring material to be evaluated and the residual stress rate after the heat test, and to determine whether the spring material to be evaluated is acceptable or not by comparing with the reference residual stress value. It is.
上記コネクタ端子用ばね材料の評価方法において、
前記耐力の値を一方の軸とし、前記残存応力率を他方の軸としたグラフを用いて、前記基準残存応力値が一定となるように、前記基準ばね材料の耐力と残存応力の関係を示す基準残存応力曲線を作成し、前記被評価ばね材料の初期の耐力と、耐熱試験後の残存応力率の測定結果をプロットし、
前記被評価ばね材料のプロット点が、前記基準残存応力曲線により区分される領域のいずれに位置しているかにより、前記被評価ばね材料の可否を判別することができる。
In the evaluation method of the connector terminal spring material,
Using the graph with the proof stress value as one axis and the residual stress rate as the other axis, the relationship between the proof stress and the residual stress of the reference spring material is shown so that the reference residual stress value is constant. Create a reference residual stress curve and plot the initial yield strength of the spring material to be evaluated and the measurement result of the residual stress rate after the heat test,
Whether or not the spring material to be evaluated can be determined can be determined based on whether the plot point of the spring material to be evaluated is located in a region divided by the reference residual stress curve.
上記コネクタ端子用ばね材料の評価方法において、
前記残存応力率が、薄板条の曲げによる応力緩和試験により求めた応力緩和率から得られたものを用いることができる。
In the evaluation method of the connector terminal spring material,
The residual stress rate can be obtained from a stress relaxation rate obtained by a stress relaxation test by bending a thin strip.
上記コネクタ端子用ばね材料の評価方法において、
前記応力緩和試験が、片持ち梁式又は両端支持式曲げ応力負荷治具を用いることができる。
In the evaluation method of the connector terminal spring material,
For the stress relaxation test, a cantilever beam type or a double-sided support type bending stress loading jig can be used.
本発明のコネクタ端子用ばね材料の評価方法は、予め基準となる基準ばね材料の初期の耐力と、耐熱試験後の残存応力率を測定し、前記耐力と残存応力率の積で表わされる残存応力の値を基準残存応力値として、評価しようとする被評価ばね材料の初期の耐力と、耐熱試験後の残存応力率を測定し、前記残存応力値と比較して被評価ばね材料の可否を判別する方法を採用したことにより、従来の残存応力率のみでばね材料の可否を判別していた方法と比較して、残存応力率が低くて利用不可能と評価されていた材料であっても、利用することが可能であり、より正確な材料の評価が可能である。 The method for evaluating a connector terminal spring material according to the present invention measures the initial strength of a reference spring material as a reference in advance and the residual stress rate after a heat test, and the residual stress expressed by the product of the yield strength and the residual stress rate. The initial proof stress of the spring material to be evaluated and the residual stress rate after the heat test are measured using the value of the reference stress value as a reference residual stress value, and compared with the residual stress value, the propriety of the spring material to be evaluated is determined. By adopting this method, even if it is a material that has been evaluated as being unusable due to its low residual stress rate, compared to the conventional method of determining whether or not a spring material can be determined only by the residual stress rate, It can be used, and a more accurate evaluation of the material is possible.
このように従来、コネクタ端子用ばね材料として使用できなかったと判断されていた材料であっても、利用可能とすることができるので、材料選択の幅が広がる。 In this way, even a material that has been conventionally determined to be unusable as a spring material for connector terminals can be used, so the range of material selection is widened.
以下、図面を用いて本発明の実施例について詳細に説明する。図１はコネクタ端子の一例を示す断面図である。図１に示すコネクタ端子１は、オス端子２がメス端子３に嵌合する端子である。メス端子３は図１に示すように、接点部４は板材が折り曲げられてばね接点として形成されている。本実施例のばね材料の評価方法では、ばねの形状として薄板条を用いたものである。尚、本発明の評価方法は、ばね材料の形状が薄板条以外であっても適用可能である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a connector terminal. A
本実施例のコネクタ端子用ばね材料の評価方法は、図１に示すコネクタ端子のメス端子３の接点部４に用いられるばね材料として、新規な材料を探索する場合に応用した例である。以下、具体的な評価方法を詳細に説明する。
The evaluation method of the spring material for connector terminals of the present embodiment is an example applied when searching for a new material as the spring material used for the
まず、上記接点部４に用いられている既知の材料を、基準となる基準ばね材料（以下、従来材ということもある）として、この基準ばね材料の初期の耐力と、耐熱試験後の残存応力率を測定して求める。
First, a known material used for the
初期の耐力は、ＪＩＳ Ｚ ２２４１ 「金属材料引張試験方法」の規格に準拠して引張試験を行い、同規格の８．−ｄ）−１）に記載のオフセット法により耐力を求める際の下記式により、耐力σεを算出する。
σε＝Ｆε／Ａ０
上記Ｆεは、伸び計を用いて力と伸びた量との関係線図を求め、規定の永久伸びε％に相当する伸び軸上の点から試験初期の直線部分に平行線を引き、これが線図と交わる点の示す力（Ｎ）である。尚、規定の永久伸び（ε％）は、０．２％とした。また上記Ａ０は、試験片平行部の原断面積（ｍｍ２）である。
The initial yield strength was determined by conducting a tensile test in accordance with the standard of JIS Z 2241 “Metal material tensile test method”. -D) The yield strength σ ε is calculated according to the following formula when the yield strength is obtained by the offset method described in 1).
σ ε = F ε / A 0
F ε is obtained by using an extensometer to obtain a relationship diagram between the force and the amount of extension, and draws a parallel line from the point on the elongation axis corresponding to the specified permanent elongation ε% to the straight line portion at the initial stage of the test It is the force (N) indicated by the point that intersects the diagram. The specified permanent elongation (ε%) was 0.2%. Also the A 0 is the original cross-sectional area of the test KATAHIRA Gyobu (mm 2).
残存応力率は、まず応力緩和試験を行い、応力緩和率を測定し、該応力緩和率を用いて求めることができる。応力緩和率の測定は、日本伸銅協会技術標準、「薄板条の曲げによる応力緩和試験方法（ＪＣＢＡ−Ｔ３０９−２００４）」に準拠した方法を用いる。そして試験の結果より、応力緩和率を下記の算出式より求める。
応力緩和率（％）＝δｔ／δ０×１００
上記式において、δｔは加熱処理（例えば１５０℃×１０００時間）を施した耐熱試験後の曲げ応力除荷時に生じる試験片の永久たわみ変位（ｍｍ）であり、δ０は所定の曲げ応力を得るのに必要な試験片の初期たわみ変位（ｍｍ）である。
The residual stress rate can be obtained by first conducting a stress relaxation test, measuring the stress relaxation rate, and using the stress relaxation rate. The stress relaxation rate is measured using a method based on the Japan Copper and Brass Association Technical Standard, “Stress Relaxation Test Method by Bending Thin Sheet Strip (JCBA-T309-2004)”. And the stress relaxation rate is calculated | required from the following calculation formula from the result of a test.
Stress relaxation rate (%) = δ t / δ 0 × 100
In the above formula, δ t is the permanent deflection displacement (mm) of the test piece that occurs when the bending stress is unloaded after the heat test (eg, 150 ° C. × 1000 hours), and δ 0 is a predetermined bending stress. It is the initial deflection displacement (mm) of the test piece necessary to obtain.
図２は応力緩和率の測定に用いる応力負荷治具の説明図である。応力緩和率の測定は、図２に示す両端支持式曲げ応力負荷治具を用いる。図２に示す曲げ応力負荷治具１０は、ベッド１１に押さえブロック１２と変位ボルト１３が設けられ、試験片１４（基準ばね材料）に初期たわみ変位量を与えた状態で両端を固定可能に形成されている。応力緩和試験では、上記の初期たわみ変位量を与えて固定した状態で１５０℃の加熱炉に入れ、１０００時間保持した後前記加熱炉から取り出し、除荷後無負荷状態にして室温まで戻して永久たわみ変位量を測定する。尚、応力緩和率の測定は、片持ち梁式曲げ応力負荷治具を用いてもよい。
FIG. 2 is an explanatory diagram of a stress loading jig used for measuring the stress relaxation rate. The stress relaxation rate is measured using a both-end supported bending stress loading jig shown in FIG. The bending
残存応力率（％）は上記の応力緩和率を用いて下記式より求めることができる。残存応力率とは、初期の試験片の所定のたわみ量のときの曲げ応力に対して、耐熱性試験後に所定のたわみ量のときの残存している曲げ応力の割合である。
残存応力率（％）＝１００−応力緩和率（％）
The residual stress rate (%) can be obtained from the following formula using the stress relaxation rate. The residual stress rate is the ratio of the bending stress remaining at the predetermined deflection amount after the heat resistance test to the bending stress at the initial deflection amount of the test piece.
Residual stress rate (%) = 100-stress relaxation rate (%)
上記の応力緩和率の測定方法において、初期の曲げ応力（たわみ量）の設定は、使用するコネクタ端子のばね接点として要求されるばね特性に応じて、適宜設定することができる。 In the above-described method for measuring the stress relaxation rate, the initial bending stress (deflection amount) can be set as appropriate according to the spring characteristics required for the spring contact of the connector terminal to be used.
コネクタ端子用ばね接点として使用可能な新規材は、下記式に示すように、耐久後の残存応力が、従来材の耐久後の残存応力よりも大きければよい。つまり新規材として初期応力が小さくても、耐久後の応力緩和率が低ければ、耐久後でもばね接点として十分な接触荷重が得られる可能性がある。尚、上記新規材は、本発明の被評価ばね材料に該当する。
（従来材の残存応力）＜（新規材の残存応力）
A new material that can be used as a spring contact for a connector terminal only needs to have a residual stress after durability that is greater than that after durability of a conventional material, as shown in the following formula. That is, even if the initial stress is small as a new material, if the stress relaxation rate after durability is low, a sufficient contact load as a spring contact may be obtained even after durability. The new material corresponds to the spring material to be evaluated according to the present invention.
(Residual stress of conventional material) <(Residual stress of new material)
残存応力は、初期応力と残存応力率の積で表わすことができる。通常、ばねに耐力以上の荷重を加えることはないので、初期応力は耐力以下とすることができる。初期応力に耐力値を用いる理由は、下記の通りである。ばねの設計では耐力値以下となるように接触荷重を決定する。例えば片持ち梁の場合の接触荷重と曲げ応力との関係は下記式に示す通りである。耐力値が、その材料でばねとして使用できる最大応力ということになる。初期応力は、ばねとして設計できる最大の応力とした。
σ＝ｗｌ／Ｚ
σ：曲げ応力（ここでは耐力）
ｗ：接触荷重
ｌ：梁の長さ
Ｚ：断面係数
Residual stress can be expressed as a product of initial stress and residual stress rate. Usually, since the load beyond a yield strength is not applied to a spring, initial stress can be made into a yield strength or less. The reason why the proof stress value is used for the initial stress is as follows. In the spring design, the contact load is determined so as to be less than the proof stress value. For example, the relationship between the contact load and the bending stress in the case of a cantilever is as shown in the following equation. The yield strength is the maximum stress that can be used as a spring with that material. The initial stress was the maximum stress that can be designed as a spring.
σ = wl / Z
σ: Bending stress (here, yield strength)
w: contact load l: beam length Z: section modulus
図３は本発明のコネクタ端子用ばね材料の評価方法において用いる耐力と残存応力率の関係を示すグラフである。図３のグラフに示すように、上記の従来材の試験結果を、初期の耐力を縦軸とし、残存応力率を横軸としてグラフ上にプロットする。次に、グラフ上に従来材の耐力と残存応力率の関係を示す残存応力の曲線Ａを作成する。この曲線Ａが、基準残存応力曲線である。基準残存応力曲線は以下の手法で作成することができる。 FIG. 3 is a graph showing the relationship between the proof stress and the residual stress rate used in the method for evaluating a connector terminal spring material of the present invention. As shown in the graph of FIG. 3, the test results of the above-described conventional materials are plotted on the graph with the initial proof stress as the vertical axis and the residual stress rate as the horizontal axis. Next, a residual stress curve A indicating the relationship between the proof stress of the conventional material and the residual stress rate is created on the graph. This curve A is a reference residual stress curve. The reference residual stress curve can be created by the following method.
残存応力は耐久後の材料が実際に有している応力であるから、残存応力と耐力値と残存応力率との関係は、下記の関係式に示すように耐力値と残存応力率の積により表わすことができる。
従来材の残存応力＝（従来材の耐力値）×（従来材の耐久後の残存応力率）
Since the residual stress is the stress that the material after durability actually has, the relationship between the residual stress, the proof stress value and the residual stress rate is the product of the proof stress value and the residual stress rate as shown in the following relational expression. Can be represented.
Residual stress of conventional material = (Yield value of conventional material) x (Residual stress ratio after durability of conventional material)
従来材の残存応力の値が基準残存応力値である。この基準残存応力値を用いて新規材の使用の可否を判別する。具体的な判別方法は、グラフを作成する方法を用いることができる。図３に示すように、グラフ上に、上記の従来材の残存応力の関係式を満足するように曲線Ａを引く。図３のグラフにおいて、曲線Ａの右上側の領域（図中斜線で示した領域）が、残存応力が従来材よりも大きい部分である。また図３のグラフにおいて、曲線Ａの左下側の領域が、残存応力が従来材よりも小さい領域である。 The residual stress value of the conventional material is the reference residual stress value. Using this reference residual stress value, it is determined whether or not a new material can be used. As a specific determination method, a method of creating a graph can be used. As shown in FIG. 3, a curve A is drawn on the graph so as to satisfy the relational expression of the residual stress of the conventional material. In the graph of FIG. 3, a region on the upper right side of the curve A (a region indicated by diagonal lines in the drawing) is a portion where the residual stress is larger than that of the conventional material. In the graph of FIG. 3, the lower left region of the curve A is a region where the residual stress is smaller than that of the conventional material.
図３に示すグラフを用いた新規材のばね性の評価は以下の通りである。新規材の試験片について、上記従来材と同様の試験方法で、引張り試験と曲げ試験を行い、耐力と残存応力率を求める。そしてその結果を、図３に示す耐力と残存応力率の関係を示すグラフ上にプロットする。例えば、図３のグラフには、材質等が異なる新規材Ｐ１、Ｐ２、Ｑ１、Ｑ２の試験結果をそれぞれプロットした。 Evaluation of the spring property of the new material using the graph shown in FIG. 3 is as follows. A test piece of a new material is subjected to a tensile test and a bending test by the same test method as that of the conventional material, and the proof stress and the residual stress rate are obtained. And the result is plotted on the graph which shows the relationship between the yield strength and residual stress rate shown in FIG. For example, the test results of the new materials P1, P2, Q1, and Q2 having different materials are plotted on the graph of FIG.
例えば新規材Ｐ１、Ｐ２は、グラフ中に斜線で示した領域内に位置していて、残存応力が従来材よりも高いと判断できる。従って新規材Ｐ１、Ｐ２は、従来材の代りに使用することが可能であると評価することができる。一方、新規材Ｑ１、Ｑ２は、グラフ中で曲線Ａの斜線で示した領域の外側に位置しているので、従来材の代りに使用することができないと判断できる。 For example, the new materials P1 and P2 are located in a region indicated by hatching in the graph, and it can be determined that the residual stress is higher than that of the conventional material. Therefore, it can be evaluated that the new materials P1 and P2 can be used in place of the conventional materials. On the other hand, since the new materials Q1 and Q2 are located outside the region indicated by the oblique line of the curve A in the graph, it can be determined that they cannot be used in place of the conventional materials.
従来の手法によれば、材料のばね性の耐熱性を応力緩和率の数値が従来材の応力緩和率以下であるか否かにより評価していた。残存応力率で判断する場合、従来材の残存応力率以上であれば使用可能と評価できる。図３のグラフにあてはめると、新規材の数値をプロットした点が、点線Ｂに対し右側に位置すれば新規材を使用可能であり、点線Ｂの左側に位置すれば新規材を使用できないと判断する。この従来の手法を用いると、新規材Ｐ２は残存応力率が従来材Ｒよりも高いので使用できると判断し、新規材Ｐ１は残存応力率が従来材Ｒよりも低いので使用できないと判断していた。これに対し、本発明方法によれば、新規材Ｐ１も使用可能であると判断することができる。 According to the conventional method, the heat resistance of the spring property of the material is evaluated by whether or not the numerical value of the stress relaxation rate is equal to or less than the stress relaxation rate of the conventional material. When judging by the residual stress rate, it can be evaluated that it can be used if it is equal to or higher than the residual stress rate of conventional materials. When applied to the graph of FIG. 3, it is determined that the new material can be used if the point where the numerical value of the new material is plotted is located on the right side of the dotted line B, and the new material cannot be used if it is located on the left side of the dotted line B. To do. Using this conventional method, the new material P2 is judged to be usable because the residual stress rate is higher than that of the conventional material R, and the new material P1 is judged to be unusable because the residual stress rate is lower than that of the conventional material R. It was. On the other hand, according to the method of the present invention, it can be determined that the new material P1 can also be used.
また新規材Ｑ１は残存応力率が従来材Ｒよりも低いので、使用できないと判断することができる。この点は本発明方法も同じであるが、新規材Ｑ２は、残存応力率が従来材Ｒよりも高いので、残存応力率だけでは使用可能と判断することになってしまうことになる。本発明方法によれば、新規材Ｑ１、Ｑ２は使用できないと判断できる。 Since the new material Q1 has a residual stress rate lower than that of the conventional material R, it can be determined that the new material Q1 cannot be used. In this respect, the method of the present invention is the same, but the new material Q2 has a residual stress rate higher than that of the conventional material R, so that it can be determined that only the residual stress rate can be used. According to the method of the present invention, it can be determined that the new materials Q1 and Q2 cannot be used.
このように本発明の評価方法によれば、ばねの耐熱性を耐力と残存応力率の関係で整理することにより、材料の性能を同じ評価基準で評価して、コネクタ端子用ばね材料としての可否を判別することが可能となった。 As described above, according to the evaluation method of the present invention, by arranging the heat resistance of the spring according to the relationship between the proof stress and the residual stress rate, the performance of the material is evaluated based on the same evaluation criteria, and whether or not the spring material as a connector terminal can be used. Can be determined.
本発明の評価方法は、自動車用ワイヤーハーネス用コネクタ端子に用いられるばね材料の評価に好適に用いることができる。 The evaluation method of this invention can be used suitably for evaluation of the spring material used for the connector terminal for wire harnesses for motor vehicles.
以上、本発明の実施例について詳細に説明したが、本発明は、上記実施例に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲において、種々の改変が可能である。 As mentioned above, although the Example of this invention was described in detail, this invention is not limited to the said Example at all, In the range which does not deviate from the meaning of this invention, a various change is possible.
１ コネクタ端子
２ オス端子
３ メス端子
４ 接点部
１０ 曲げ応力負荷治具
１４ 試験片（コネクタ端子用ばね材料）
Ａ 基準残存応力曲線
DESCRIPTION OF
A Standard residual stress curve
Claims (4)
予め基準となる基準ばね材料の初期の耐力Ｙ０と、耐熱試験後の残存応力率Ｒ０を測定し、前記耐力Ｙ０と残存応力率Ｒ０の積Ｙ０・Ｒ０で表わされる残存応力の値を基準残存応力値として、
評価しようとする被評価ばね材料の初期の耐力Ｙと、耐熱試験後の残存応力率Ｒを測定し、前記初期の耐力Ｙと前記残存応力率Ｒの積Ｙ・Ｒを算出し、前記基準残存応力値と比較して、Ｙ・Ｒ＞Ｙ０・Ｒ０となれば被評価ばね材料が利用可能であると判定することにより、被評価ばね材料の可否を判別することを特徴とするコネクタ端子用ばね材料の評価方法。 In a method for evaluating a spring material used for a connector terminal,
The initial proof stress Y0 of the reference spring material as a reference and the residual stress rate R0 after the heat test are measured in advance, and the residual stress value represented by the product Y0 · R0 of the proof strength Y0 and the residual stress rate R0 is used as the reference residual stress. As value
The initial yield strength Y of the spring material to be evaluated and the residual stress rate R after the heat test are measured, and the product Y · R of the initial yield strength Y and the residual stress rate R is calculated. A connector terminal spring characterized by determining whether or not a spring material to be evaluated can be used when Y · R> Y0 · R0 as compared with a stress value. Material evaluation method.
前記被評価ばね材料のプロット点が、前記基準残存応力曲線により区分される領域のうち、高残存応力率側の領域に位置していれば、前記被評価ばね材料が利用可能であると判定することにより、前記被評価ばね材料の可否を判別することを特徴とする請求項１記載のコネクタ端子用ばね材料の評価方法。 Using a graph with the value of the proof stress as one axis and the residual stress rate as the other axis, the proof stress Y0 and the residual stress rate R0 of the reference spring material are set so that the reference residual stress value is constant. Create a reference residual stress curve showing the relationship, plot the initial yield strength Y of the spring material to be evaluated and the measurement result of the residual stress rate R after the heat test,
If the plot point of the spring material to be evaluated is located in a region on the high residual stress rate side in the region divided by the reference residual stress curve, it is determined that the spring material to be evaluated can be used. The determination method of the spring material for connector terminals according to claim 1, wherein whether or not the spring material to be evaluated is determined is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012055597A JP5867191B2 (en) | 2012-03-13 | 2012-03-13 | Evaluation method of spring material for connector terminals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012055597A JP5867191B2 (en) | 2012-03-13 | 2012-03-13 | Evaluation method of spring material for connector terminals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2013190262A JP2013190262A (en) | 2013-09-26 |
| JP5867191B2 true JP5867191B2 (en) | 2016-02-24 |
Family
ID=49390693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012055597A Expired - Fee Related JP5867191B2 (en) | 2012-03-13 | 2012-03-13 | Evaluation method of spring material for connector terminals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5867191B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324462B (en) * | 2021-12-30 | 2024-04-12 | 杭州电子科技大学 | Method for evaluating compression relaxation rate of PTFE (polytetrafluoroethylene) spring based on temperature |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07104236B2 (en) * | 1990-06-06 | 1995-11-13 | 住友電装株式会社 | Stress relaxation test apparatus and stress relaxation test method |
| JP3432329B2 (en) * | 1995-04-21 | 2003-08-04 | 積水化学工業株式会社 | Emergency bandage film |
| JPH0987814A (en) * | 1995-09-27 | 1997-03-31 | Nikko Kinzoku Kk | Production of copper alloy for electronic equipment |
| JP3807475B2 (en) * | 1998-07-08 | 2006-08-09 | 株式会社神戸製鋼所 | Copper alloy plate for terminal and connector and manufacturing method thereof |
| JP2005017284A (en) * | 2003-05-30 | 2005-01-20 | Nikko Metal Manufacturing Co Ltd | Method of evaluating bending workability and spring characteristics of metallic material, and metallic material |
| JP5660757B2 (en) * | 2008-11-07 | 2015-01-28 | 株式会社神戸製鋼所 | Cu-Ni-Si-based copper alloy sheet for Sn plating |
-
2012
- 2012-03-13 JP JP2012055597A patent/JP5867191B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013190262A (en) | 2013-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107305973B (en) | Length extension monitoring for determining the aging of battery cells or battery modules | |
| JP5926495B2 (en) | Shunt resistance type current sensor | |
| WO2009148160A1 (en) | Capacitor's remaining lifetime diagnosing device, and electric power compensating device having the remaining lifetime diagnosing device | |
| JP6443656B2 (en) | Battery status judgment device | |
| JP6010468B2 (en) | Shunt resistance type current sensor | |
| JP4851290B2 (en) | Connecting terminal | |
| EP3147643A1 (en) | Method and computer program product | |
| JP2012028057A (en) | Electric wire and electric wire with terminal | |
| CN117929127B (en) | Multilayer ceramic capacitor fracture testing device and fracture analysis method | |
| JP5867191B2 (en) | Evaluation method of spring material for connector terminals | |
| JP7512932B2 (en) | Material evaluation method and manufacturing method for metal member | |
| CN106291380A (en) | The appraisal procedure of cell degradation and device | |
| JP3874490B2 (en) | Measurement method in high-speed tensile test | |
| DE112018002807T5 (en) | Temperature measuring device using strain gauges | |
| CN102137945A (en) | Silver alloy usable in probe pins and having excellent contact resistance and excellent anti-stain properties | |
| CN104279947B (en) | Plate with the strain measurement piece for measuring deformation information | |
| Friedlein et al. | Occurrence and influence of fretting corrosion on receptacle contact resistance | |
| CN115684754B (en) | Service life assessment method for battery connection harness of energy storage system | |
| Saadouki et al. | Behavior to damage of two hardening precipitation copper alloys: experimental characterization and numerical study | |
| JP6058325B2 (en) | Substrate inspection apparatus and substrate inspection method | |
| JP4744492B2 (en) | Measurement method for thermal history of transmission lines | |
| JP2013205188A (en) | Spring probe | |
| CN218003557U (en) | Multi-contact surface resistance detection mechanism | |
| JP5226592B2 (en) | Limit load prediction method for resin molded parts with stress concentration | |
| KR20120021114A (en) | Life assessment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140627 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20150318 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20150421 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20150615 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20151023 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20151208 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20151221 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5867191 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |