WO2014190784A1 - Dispositif d'essai de la force de soudure par fusion statique d'un matériau pour contact électrique et procédé d'essai associé - Google Patents

Dispositif d'essai de la force de soudure par fusion statique d'un matériau pour contact électrique et procédé d'essai associé Download PDF

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Publication number
WO2014190784A1
WO2014190784A1 PCT/CN2014/072106 CN2014072106W WO2014190784A1 WO 2014190784 A1 WO2014190784 A1 WO 2014190784A1 CN 2014072106 W CN2014072106 W CN 2014072106W WO 2014190784 A1 WO2014190784 A1 WO 2014190784A1
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WO
WIPO (PCT)
Prior art keywords
contact
static
movable contact
lever
welding force
Prior art date
Application number
PCT/CN2014/072106
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English (en)
Chinese (zh)
Inventor
翁桅
李素华
王珩
李国伟
林万焕
Original Assignee
福达合金材料股份有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 福达合金材料股份有限公司 filed Critical 福达合金材料股份有限公司
Publication of WO2014190784A1 publication Critical patent/WO2014190784A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators
    • G01L5/0066—Calibration arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0038—Force sensors associated with force applying means applying a pushing force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0296—Welds

Definitions

  • the invention relates to a testing device and a method for testing the performance of an electrical contact material, in particular to a static welding force testing device for an electrical contact material and a testing method thereof.
  • the electrical contact material is processed into a corresponding contact application power component such as a circuit breaker, and when the contact is operated, the conductive spot and the metal in the vicinity thereof are melted and welded by the heat of the contact resistance, and the fusion welding generated in this case is called Static welding, which occurs mostly in closed contact contacts with a fixed contact connection or a sufficient contact force.
  • Contact welding is generally performed when a short-circuit current or a short-time strong pulse current passes.
  • the current passes through a pair of contacts in a closed state, so that the current gradually increases from zero.
  • the contact contacts the inner surface.
  • the spotted thin metal has just started to melt, and the contact resistance is lowered. If the current is cut off, the contacts can be easily separated. After the separation, a slight melting trace can be observed on the contact surface.
  • the current at this time is called the contact start. Melt current. If the current through the contacts is further increased, the contacts begin to be welded. In this case, a certain tensile force must be applied to separate the contacts.
  • This tensile force is usually called the static welding force of the contact material, and the contacts begin to weld.
  • the phenomenon of the current is called the start of the welding current.
  • the current through the contact continues to increase, so that the contact base metal is melted into one body. The larger the current, the stronger the fusion welding and the greater the welding force until the tensile strength of the contact base metal is reached or approached.
  • the force gauge obtains the static welding force value, but because the spring is easy to shake, the alignment of the two contact points is inaccurate, and the spring also has a certain nonlinear relationship;
  • the third method is The vibration exciter is used for testing, but the exciter generates torque and affects the measurement results.
  • a first object of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a static contact welding force testing device for an electrical contact material, which has the advantages of simple and convenient operation, low cost, and high precision. High stability and high sensitivity make it difficult to introduce experimental errors.
  • Another object of the present invention is to provide a test method for testing the properties of electrical contact materials using the above described apparatus.
  • the technical solution of the present invention includes a bracket, a force applying mechanism and a testing mechanism, wherein the bracket is provided with a horizontal mounting plate, and the supporting plate is vertically fixedly connected with a supporting shaft.
  • the support shaft is hingedly connected with a lever, the urging mechanism is coupled with one end of the lever, and the other end of the lever is hingedly disposed with a connecting rod, and the lower end of the connecting rod is fixedly provided with a movable contact conductive
  • the upper clamping device comprises a static contact conductive lower clamp, a pressure sensor, and a data collector, wherein the static contact conductive lower clamp is placed on the pressure sensor, and the static contact conductive lower clamp is located at the dynamic touch a conductive insulating upper clamp, the two are configured to be in a relative contact and a opposite direction, and the first contact insulating sheet is disposed between the static contact conductive upper and lower clamps and the pressure sensor, and the movable contact conductive upper clamp and the connecting rod A second insulating sheet is disposed between the two.
  • the urging mechanism includes a motor fixed to the mounting plate, the motor is provided with a screw rod, and one end of the lever is hingedly provided with a screw nut, and the screw nut and the screw rod are cooperatively arranged. .
  • the bracket includes an upper fixing plate and a lower fixing plate which are disposed in parallel with the mounting plate, and the upper fixing plate is longitudinally fixedly disposed with a plurality of longitudinal fixing shafts, and the mounting plate is fixed to the longitudinal direction.
  • the shaft is longitudinally slidably guided, and the upper fixed plate is provided with a downward balance shaft, and the lower end of the balance shaft is fixedly connected with the mounting plate.
  • the technical solution of the present invention includes the following steps:
  • the contact material is made into a movable contact and a static contact of a specification, and the movable contact is fixed on the base of the movable contact to form a movable contact assembly, and the static contact is fixed on the base of the static contact to form a static a contact assembly, the movable contact assembly is mounted on the conductive upper clamp of the movable contact, and the static contact assembly is mounted on the lower contact conductive lower clamp;
  • test results when the test current is applied to the movable contact and the stationary contact, the positive and negative power lines of the transmission power supply are kept vertically. Prevent Lorentz forces from affecting test results.
  • the invention provides a static welding welding force testing device for an electric contact material.
  • the testing device measures the static welding force in the axial direction without displacement in the direction perpendicular to the axial direction, thereby ensuring accurate alignment of the contacts during the experiment. Will introduce experimental error . Since the contact between the contact and the sensor is hard, there is no factor such as time lag and nonlinearity caused by the addition of a spring, etc., and the sensitivity of the fusion welding force in real time is high.
  • Figure 1 is a diagram of a static welding force test device for an electrical contact material
  • Figure 2a is a schematic diagram of a static contact
  • Figure 2b is a schematic diagram of the moving contact
  • Figure 3a is a schematic view of the static contact base
  • Figure 3b shows the base of the moving contact.
  • a specific embodiment of the present invention as shown in FIG. 1 includes a bracket 1 , a force applying mechanism and a testing mechanism, and the bracket 1 described in this embodiment
  • a horizontal mounting plate 11 is disposed thereon, and an upper fixing plate 12 and a lower fixing plate 13 disposed in parallel with the mounting plate, and a plurality of longitudinal fixing shafts are longitudinally fixed between the upper fixing plate 12 and the lower fixing plate.
  • the mounting plate 11 is longitudinally slidably engaged with the longitudinal fixing shaft 14, and the upper fixing plate 12 is provided with a downward balance shaft 121, and the lower end of the balance shaft 121 and the mounting plate 11
  • the fixed connection setting so set, ensures that the mounting plate 11 is level and can be adjusted according to actual needs.
  • the support plate 11 is vertically fixedly connected with a support shaft 111, and the support shaft 111 is hingedly connected with a lever.
  • the urging mechanism includes a motor 21 fixed to the mounting plate, the motor is interlocked with a screw 22, and one end of the lever is hingedly provided with a screw nut 23, the screw nut 23 and the screw 22, in conjunction with the setting, the other end of the lever 6 is hingedly disposed with a connecting rod 61, and the lower end of the connecting rod 61 is fixedly provided with a movable contact conductive upper clamp 62
  • the test mechanism includes a static contact conductive lower clamp 71, a pressure sensor 72, and a data collector, the pressure sensor 72 And the data collector can be set by using a conventional electronic balance on the market, the static contact conductive lower clamp 71 is placed on the pressure sensor 72, and the static contact conductive lower clamp is located on the movable contact conductive upper clamp 62.
  • the two are configured to be in a relative contact and a phase-separating manner.
  • the first contact insulating sheet 74 is disposed between the static contact conductive upper and lower clamps 71 and the pressure sensor 72, and the movable contact conductive upper clamp 62 and the connecting rod
  • a second insulating sheet 63 is disposed between 61.
  • the method for testing the static welding force of the electrical contact material by using the above device comprises the following steps:
  • Experimental example 1 The contact sample was subjected to Ag-Ag self-pairing experiment, the experimental pressure was 6.86N, the experimental voltage was 1.30KV, and the experimental current was 3.00.
  • KA the number of experiments is 6 times, the copper parts are shown in Figure 3, the static and dynamic points are shown in Figure 2, the diameter is 5mm, the experimental results are as follows:
  • Experimental example 2 The contact sample was self-paired with AgSnO 2 -AgSnO 2 , the experimental pressure was 8.82N, the experimental voltage was 1.50KV, the experimental current was 3.28KA, and the number of experiments was 6 times.
  • the copper parts are shown in Figure 3, and the static and dynamic points are shown in Figure 2. Show that the diameter is 6mm, the experimental results are as follows:

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Resistance Welding (AREA)

Abstract

La présente invention concerne un dispositif d'essai de la force de soudure par fusion statique d'un matériau pour contact électrique et un procédé d'essai associé, utilisés pour mesurer la force de soudure par fusion d'un matériau pour contact électrique utilisé dans tous les interrupteurs des appareils électriques. Ledit dispositif est constitué d'un système fixe, d'un système d'application d'une force et d'un système d'essai, ledit système fixe comprenant principalement un arbre fixe (14), un écrou fixe, des plaques fixes (12, 13), un arbre d'équilibre (121) et un siège fixe ; le système d'application d'une force comprenant principalement un servomoteur (21), un arbre support (111), un écrou et un levier (6) ; et le système d'essai comprenant principalement des coussinets de serrage (62, 71), un capteur de pression (72) et un dispositif de recueil de données. Une pression fixe donnée est appliquée sur un contact mobile et sur un contact fixe par le système d'application d'une force ; après fermeture, une relation courant-durée donnée est chargée ; puis une certaine force de traction est appliquée par le système d'application d'une force afin de séparer le contact mobile du contact fixe ; et, enfin, la mesure de la force de fusion par soudure statique du matériau pour contact électrique est réalisée par le système d'essai.
PCT/CN2014/072106 2013-05-30 2014-02-14 Dispositif d'essai de la force de soudure par fusion statique d'un matériau pour contact électrique et procédé d'essai associé WO2014190784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310212917.3A CN103308387B (zh) 2013-05-30 2013-05-30 电触头材料的静熔焊力测试装置及其测试方法
CN201310212917.3 2013-05-30

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WO2014190784A1 true WO2014190784A1 (fr) 2014-12-04

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Cited By (3)

* Cited by examiner, † Cited by third party
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CN107024387A (zh) * 2017-05-05 2017-08-08 核工业理化工程研究院 一种新型的材料强度测试设备
CN109459169A (zh) * 2018-11-02 2019-03-12 江苏乾涌控股有限公司 一种多功能测力设备
CN113894758A (zh) * 2021-09-26 2022-01-07 国网江苏省电力有限公司营销服务中心 一种水气热终端展示测试用快速拆装夹具及其使用方法

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CN103308387B (zh) * 2013-05-30 2016-03-16 福达合金材料股份有限公司 电触头材料的静熔焊力测试装置及其测试方法
CN104483192B (zh) * 2014-11-27 2017-01-25 福达合金材料股份有限公司 一种基于威布尔分布的电触头材料静熔焊力数据处理方法
CN106568592B (zh) * 2016-11-17 2019-04-19 河南平芝高压开关有限公司 触头装配拉伸试验用工装及其杆端接头
CN110274827B (zh) * 2019-07-18 2021-08-31 哈尔滨工业大学 一种适用于触点熔焊力测试的试验系统及方法
CN112768279B (zh) * 2020-12-30 2024-01-02 浙江福达合金材料科技有限公司 电触头组件的一种制造装置
CN115342866B (zh) * 2022-10-18 2023-01-31 中国空气动力研究与发展中心高速空气动力研究所 一种压电陶瓷作动器检测装置及系统
CN117130352B (zh) * 2023-10-26 2024-01-30 深圳多为智联科技有限公司 一种电动车控制器测试装置及其测试方法

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107024387A (zh) * 2017-05-05 2017-08-08 核工业理化工程研究院 一种新型的材料强度测试设备
CN109459169A (zh) * 2018-11-02 2019-03-12 江苏乾涌控股有限公司 一种多功能测力设备
CN113894758A (zh) * 2021-09-26 2022-01-07 国网江苏省电力有限公司营销服务中心 一种水气热终端展示测试用快速拆装夹具及其使用方法
CN113894758B (zh) * 2021-09-26 2024-01-30 国网江苏省电力有限公司营销服务中心 一种水气热终端展示测试用快速拆装夹具及其使用方法

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CN103308387A (zh) 2013-09-18

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