CN103149442A - Automatic testing device for contact resistor made of electrical contact material - Google Patents

Abstract

The utility model relates to an automatic test device for contact resistance of electric contact materials, which relates to a test device for contact resistance of electric contact materials. It solves the problem that there is currently no electrical contact material contact resistance testing device that can automatically control contact pressure and support multi-contact continuous measurement. Both the longitudinal and horizontal sliding tables are arranged on the upper surface of the machine base; the longitudinal sliding table is connected with the horizontal sliding table through the connecting piece of the horizontal and longitudinal sliding table; the upper end of the connecting piece of the horizontal and longitudinal sliding table is fixed with a vertical sliding table; A pressure sensor is fixedly arranged on the straight slide table; the two ends of the pressure sensor connecting piece are respectively connected with the elastic element and the pressure sensor; the probe is installed on the probe fixture connecting piece through the probe fixture; On the upper surface of the longitudinal sliding table; the electric contact to be tested is fixedly installed on the multi-contact clamp body; it realizes the automatic control of the contact force of the contact and the continuous measurement of the contact resistance of multiple contacts. Accurate, easy to operate, high efficiency advantages.

Description

Automatic test device for contact resistance of electrical contact materials

technical field

The invention relates to a device for testing the contact resistance of electric contact materials.

Background technique

Electrical contact materials for switches, relays, electrical connections and electrical plug-in components, also known as electrical contact materials. Generally, there are two types of contact materials for strong current and contact materials for weak current. Electrical contact materials are key functional materials and important basic materials for power generation, transmission and distribution, and power consumption equipment in my country. They are used in a wide range of fields, and their product quality or technical level directly affects or even restricts high-end products in many fields and industries in my country. Product Development.

The so-called contact resistance refers to the obstruction of the current flowing by two closely contacted junctions, whether it is a fine IC socket or a thick bolt-fixed busbar connection, there is a contact resistance. Contact resistance is an important basis for evaluating the connection performance and reliability of electromechanical components. The existence of contact resistance increases the loss of the conductor when it is energized, which increases the temperature at the contact point, and its value directly affects the current-carrying capacity of the circuit when it is working normally. Therefore, the value of the contact resistance is an important data for the maintenance and quality acceptance of the circuit.

At present, the professional laboratories of foreign electrical contact material manufacturers, such as Tanaka Company of Japan and Daduke Company of the United States, have specialized testing instruments for testing the cold contact resistance of rivet contact materials, which are characterized by high automation and high testing accuracy. It provides test verification conditions and guarantee conditions for the in-depth development of contact materials and the development of process links. my country's national standard GB/T15078-1994 "Measurement method of contact resistance of precious metal electrical contact materials" stipulates the measurement method of contact resistance of precious metal and its alloy electrical contact materials (static contact), and is applicable to other metal and alloy electrical contacts The use of materials, but the development of relevant practical automated testing equipment has not been carried out. The contact resistance of an electrical contact is related to its contact surface, including the actual contact area, contact surface material, etc. When the contact is subjected to external pressure, the surface of the contact will be deformed, and the actual contact area of the contact will be changed, thereby changing the contact resistance. The static contact characteristics of electrical contact materials are the changing laws of electrical contact pressure and contact resistance. At present, there is no device that can automatically control the contact pressure and support continuous measurement of multiple contacts for analyzing the change law of electrical contact pressure and contact resistance.

Contents of the invention

In order to solve the problem that there is no electrical contact material contact resistance test device that can automatically control the contact pressure and support multi-contact continuous measurement, the present invention proposes an automatic test device for the electrical contact material contact resistance.

An automatic contact resistance test device for electrical contact materials, which includes a vertical slide table, a control component, a pressure sensor, a pressure sensor connector, an elastic element, a probe clamp connector, a probe clamp, a probe, a multi-contact clamp body, The longitudinal sliding table, the machine base, the horizontal sliding table and the connecting piece between the horizontal and vertical sliding tables; the elastic element adopts a hexagonal annular elastic element; the longitudinal sliding table and the horizontal sliding table are both arranged on the upper surface of the machine base The horizontal sliding table is arranged along one side of the machine base; the vertical sliding table is vertically arranged with the horizontal sliding table; The upper end of the upper end is fixedly provided with a vertical slide table; the vertical slide table is fixedly provided with a pressure sensor; one end of the pressure sensor connector is fixedly connected with a side wall of the elastic element; the other end of the pressure sensor connector is connected with the pressure sensor The sensors are connected; the elastic element is fixed with a probe clamp connector on the side wall opposite to the side wall on which the pressure sensor connector is fixed; the probe is mounted on the probe clamp connector through the probe clamp The multi-contact clamp is fixedly arranged on the upper surface of the longitudinal slide; the electric contact to be tested is fixedly installed on the multi-contact clamp; The contact clamps are arranged oppositely; the pressure sensing signal output end of the pressure sensor is connected to the pressure sensing signal input end of the control assembly; the horizontal sliding table control signal output end and the longitudinal sliding table control signal output end of the control assembly Respectively connect the horizontal sliding table control signal input end of the horizontal sliding table and the longitudinal sliding table control signal input end of the longitudinal sliding table; connected to the signal input.

The invention realizes the automatic control of the contact force of the contact and the continuous measurement of the contact resistance of multiple contacts, and has the advantages of accurate measurement, convenient operation and high efficiency.

Description of drawings

Fig. 1 is a schematic structural view of an automatic contact resistance test device for electrical contact materials described in the present application; Fig. 2 is a schematic diagram of a module structure of the control assembly 2 described in the second embodiment; Fig. 3 is a schematic diagram of the control assembly 2 described in the third embodiment Schematic diagram of the module structure; FIG. 4 is a schematic diagram of the structure of the multi-contact clamp body 9 .

Detailed ways

Specific Embodiment 1: This embodiment is described in conjunction with FIG. 1. The automatic contact resistance test device for electrical contact materials described in this embodiment includes a vertical slide 1, a control assembly 2, a pressure sensor 3, a pressure sensor connector 4, Elastic element 5, probe clamp connector 6, probe clamp 7, probe 8, multi-contact clamp body 9, longitudinal sliding table 10, machine base 11, horizontal sliding table 12 and horizontal and vertical sliding table connecting piece 13; The elastic element 5 adopts a hexagonal annular elastic element; the longitudinal sliding table 10 and the horizontal sliding table 12 are all arranged on the upper surface of the machine base 11; the horizontal sliding table 12 is arranged along a side of the machine base 11 The longitudinal slide 10 and the horizontal slide 12 are vertically arranged; the longitudinal slide 10 is connected with the horizontal slide 12 through the horizontal and vertical slide connector 13; Sliding table 1; a pressure sensor 3 is fixedly arranged on the vertical sliding table 1; one end of the pressure sensor connector 4 is fixedly connected to a side wall of the elastic element 5; the other end of the pressure sensor connector 4 is connected to the pressure sensor 3; the elastic element 5 is fixedly provided with a probe clamp connector 6 on the side wall opposite to the side wall on which the pressure sensor connector 4 is fixed; the probe 8 is mounted on the probe through the probe clamp 7 On the needle clamp connector 6; the multi-contact clamp body 9 is fixedly arranged on the upper surface of the longitudinal slide 10; the electric contact to be tested is fixedly installed on the multi-contact clamp body 9; the probe 8 and The multi-contact clamp body 9 equipped with the electric contact to be tested is arranged oppositely; the pressure sensing signal output end of the pressure sensor 3 is connected with the pressure sensing signal input end of the control assembly 2; the lateral direction of the control assembly 2 The slide table control signal output end and the vertical slide table control signal output end are respectively connected to the horizontal slide table control signal input end of the horizontal slide table 12 and the longitudinal slide table control signal input end of the vertical slide table 10; The slide table control signal output end is connected with the vertical slide table control signal input end of the vertical slide table 1.

Specific embodiment two: this embodiment is described in conjunction with Fig. 2, and the difference between this embodiment and specific embodiment one is that the control assembly 2 includes a single-chip controller 2-1, a programmable controller 2-2, and an analog-to-digital converter 2-3 , digital-to-analog converter 2-4, four-wire method voltage detector 2-5 and four-wire method current detector 2-6; -3 is connected to the analog-to-digital conversion data output end; the pressure sensing data signal input end of the analog-to-digital converter 2-3 is the pressure sensing signal input end of the control component 2; the voltage detection data of the analog-to-digital converter 2-3 The signal input end and the current detection data signal input end are respectively connected to the voltage detection data signal output end of the four-wire method voltage detector 2-5 and the current detection data signal output end of the four-wire method current detector 2-6; The current detection control signal output end of the device 2-1 is connected with the current detection control signal input end of the digital-analog converter 2-4; the current detection control signal output end of the digital-analog converter 2-4 is connected with the four-wire method current detector 2 The current detection control signal input terminal of -6 is connected; the horizontal slide table control signal output end and the vertical slide table control signal output end of the single-chip controller 2-1 are the horizontal slide table control signal output ends of the control assembly 2 and the control signal output end of the longitudinal sliding table; the control data signal output and input ends of the single-chip controller 2-1 are connected with the control data signal output and input ends of the programmable controller 2-2; the vertical of the programmable controller 2-2 The output end of the control signal of the straight slide table is the output end of the control signal of the vertical slide table of the control assembly 2 . Other compositions and connection methods are the same as those in Embodiment 1.

Specific embodiment three: this embodiment is described in conjunction with Fig. 3, and the difference between this embodiment and specific embodiment two is that the control assembly 2 also includes a display 2-7; -1 connected to the display data output. Other compositions and connection methods are the same as those in the second embodiment.

Embodiment 4: This embodiment is described in conjunction with FIG. 4. The difference between this embodiment and Embodiment 1 is that the multi-contact clamp body 9 includes a clamp base 9-1, a clamp body 9-2, and four baffle plates 9- 3. Conductive plate 9-4, two terminal posts 9-5 and N identical fixture components; the value range of N is an even number greater than or equal to 4; the clamp body 9-2 passes through four baffle plates 9-3 is fixedly installed on the upper surface of the clamp base 9-1; a conductive plate 9-4 is provided along the central axis of the clamp body 9-2 in the length direction; the conductive plate 9-4 is arranged along the width direction A terminal post 9-5 is respectively arranged on the two sides; N/2 V-shaped card slots are symmetrically arranged on the two sides of the conductive plate 9-4 along the length direction; the N clamp assemblies They are respectively fixedly installed in the clamp assembly grooves on the clamp body 9-2; the N clamp assemblies are divided into two groups; each of the clamp assemblies corresponds to a V-shaped slot; the clamp assembly includes a T-shaped Clamp head 9-6, clamp spring 9-7 and operating handle 9-8; the clamp spring 9-7 is arranged between the T-shaped clamp head 9-6 and operating handle 9-8; operating handle 9-8 passes through the clamp Spring 9-7 realizes T-shaped fixture head 9-6 action. Other compositions and connection methods are the same as those in Embodiment 1.

The model that vertical slide table 1 adopts IAI company to produce among accompanying drawing 1 is the slide table of TX-28L.

In accompanying drawing 1, the slide table 12 adopting the model produced by IAI company is the slide table of RCP2-SA5C.

The vertical sliding table 10 in accompanying drawing 1 adopts the model of Beijing Keying Chuangtuo Technology Development Co., Ltd. as LY111DPY50M-F sliding table.

The pressure sensor 3 in accompanying drawing 1 adopts the pressure sensor of model PW4MC3 produced by HBM Company.

The probe clamp connector 6 in accompanying drawing 2 adopts the horizontal fast clamp of model GH-201 produced by HAITAN Company.

Working process and principle:

The vertical slide table 1, the pressure sensor 3, the pressure sensor connector 4, the elastic element 5, the probe clamp connector 6, the probe clamp 7, and the probe 8 form a contact force control device for the contacts, and the vertical slide table 1. The control of the displacement realizes the control of the deformation of the elastic element 5, that is, the control of the contact force. During the contact force control process, the pressure sensor 3 measures the contact force and feeds it back to the control component 2 to realize closed-loop control. Described longitudinal sliding table 10 and transverse sliding table 12 respectively realize the relative movement between the multi-contact holder body 9 and the probe 8 along the longitudinal direction and the transverse direction, so as to ensure that each contact on the multi-contact holder body 9 can be connected with the probe. Pin 8 makes accurate contact. By measuring the contact pressure curve and using the four-wire method to measure the resistance curve, the static contact characteristics of the electrical contact material, that is, the change law of the electrical contact pressure and contact resistance, are analyzed. The fixture base 9-1 is connected with the longitudinal sliding table 10 by bolts. The positioning of the clamp body 9-2 on the clamp base 9-1 is realized by the sides and the limiting surfaces of the grooves on the clamp base 9-1. The conductive plate 9-4 is fixedly connected to the clamp body 9-2 by bolts, and the terminal 9-5 on the conductive plate 9-4 is convenient for wiring. The clamp head 9-6 clamps the contact to be tested on the corresponding V-shaped groove on the conductive plate 9-4 under the pressure of the clamp spring 9-7. Insertion and removal of contacts. The fixture head 9-6 is made of insulating material, so as to realize the insulation between the contact to be tested and the fixture base 9-1. After the assembly of the device is completed, the multi-contact holder body 9 needs to be positioned. The specific implementation method is as follows, the probe 8 is replaced with a steel needle with a needle point, and the needle points of the steel needles are brought into contact with the conductive plate 9 one by one through the quick movement and micro-movement of the vertical slide 10, the horizontal slide 12 and the vertical slide 1 - the root of the upper surface of each V-shaped draw-in groove on the 4, and record the displacement of the vertical slide table 10 and the horizontal slide table 12 required by each V-shaped draw-in groove by the control assembly 2, and complete the positioning.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in this technical field, without departing from the concept of the present invention, some simple deduction or replacement can also be made, which should be regarded as belonging to the scope of patent protection determined by the claims submitted by the present invention .

Claims (4)

1. An automatic contact resistance test device for electrical contact materials, characterized in that it includes a vertical slide (1), a control assembly (2), a pressure sensor (3), a pressure sensor connector (4), and an elastic element (5) , probe clamp connector (6), probe clamp (7), probe (8), multi-contact clamp body (9), longitudinal slide (10), machine base (11), transverse slide (12 ) and horizontal and vertical sliding table connectors (13); the elastic element (5) adopts a hexagonal annular elastic element; the vertical sliding table (10) and the horizontal sliding table (12) are all arranged on the support ( 11) on the upper surface; the horizontal sliding table (12) is arranged along a side of the machine base (11); the vertical sliding table (10) is vertically arranged with the horizontal sliding table (12); the vertical sliding table (10) passes through the horizontal The vertical slide (13) is connected to the horizontal slide (12); the upper end of the horizontal and vertical slide (13) is fixedly provided with a vertical slide (1); the vertical slide (1) A pressure sensor (3) is fixedly arranged on the top; one end of the pressure sensor connector (4) is fixedly connected to a side wall of the elastic element (5); the other end of the pressure sensor connector (4) is connected to the pressure sensor ( 3) connected; the elastic element (5) is fixedly provided with a probe clamp connector (6) on the side wall opposite to the side wall on which the pressure sensor connector (4) is fixed; the probe (8) The probe clamp (7) is installed on the probe clamp connector (6); the multi-contact clamp body (9) is fixedly arranged on the upper surface of the longitudinal slide (10); the electric contact to be tested is fixed Installed on the multi-contact clamp body (9); the probe (8) is arranged opposite to the multi-contact clamp body (9) equipped with the electric contact to be tested; the pressure of the pressure sensor (3) The output end of the sensing signal is connected to the input end of the pressure sensing signal of the control assembly (2); the output end of the control signal of the horizontal sliding table and the output end of the control signal of the vertical sliding table of the control assembly (2) are respectively connected to the horizontal sliding table (12 ) of the horizontal sliding table control signal input end and the longitudinal sliding table control signal input end of the vertical sliding table (10); the vertical sliding table control signal output end of the control assembly (2) is connected with the vertical sliding table (1) The vertical slide table control signal input terminal is connected. 2. The electrical contact material contact resistance automatic testing device according to claim 1, characterized in that the control assembly (2) comprises a single-chip controller (2-1), a programmable controller (2-2), an analog-to-digital conversion device (2-3), digital-to-analog converter (2-4), four-wire voltage detector (2-5) and four-wire current detector (2-6); the single-chip controller (2-1 ) is connected to the analog-to-digital conversion data output of the analog-to-digital converter (2-3); the pressure sensing data signal input of the analog-to-digital converter (2-3) is the control assembly (2 ) of the pressure sensing signal input end; the voltage detection data signal input end and the current detection data signal input end of the analog-to-digital converter (2-3) are respectively connected to the voltage detection data signal of the four-wire method voltage detector (2-5) output terminal and the current detection data signal output terminal of the four-wire method current detector (2-6); the current detection control signal output terminal of the single-chip controller (2-1) and the digital-to-analog converter (2-4) The input end of the current detection control signal is connected; the output end of the current detection control signal of the digital-to-analog converter (2-4) is connected with the input end of the current detection control signal of the four-wire method current detector (2-6); the single-chip controller (2-1) the horizontal sliding table control signal output end and the vertical sliding table control signal output end are the horizontal sliding table control signal output end and the longitudinal sliding table control signal output end of the control assembly (2); The control data signal output and input ends of the controller (2-1) are connected with the control data signal output and input ends of the programmable controller (2-2); the vertical slide table control signal output of the programmable controller (2-2) The end is the vertical slide control signal output end of the control assembly (2). 3. The electrical contact material contact resistance automatic testing device according to claim 2, characterized in that the control assembly (2) also includes a display (2-7); the display data input terminal of the display (2-7) is connected to the The display data output terminals of the single-chip controller (2-1) are connected. 4. The electrical contact material contact resistance automatic testing device according to claim 1, characterized in that the multi-contact clamp body (9) comprises a clamp base (9-1), a clamp body (9-2), four A baffle plate (9-3), a conductive plate (9-4), two binding posts (9-5) and N identical clamp assemblies; the value range of N is an even number greater than or equal to 4; the The clamp body (9-2) is fixedly installed on the upper surface of the clamp base (9-1) through four baffles (9-3); There is a conductive plate (9-4); the two sides of the conductive plate (9-4) along the width direction are respectively provided with a terminal post (9-5); the conductive plate (9-4) is arranged along the length N/2 V-shaped slots are respectively symmetrically arranged on the two sides of the direction; the N clamp components are fixedly installed in the clamp component grooves on the clamp body (9-2); the N clamp components The components are divided into two groups; each clamp component corresponds to a V-shaped slot; the clamp component includes a T-shaped clamp head (9-6), a clamp spring (9-7) and an operating handle (9-8 ); the clamp spring (9-7) is arranged between the T-shaped clamp head (9-6) and the operating handle (9-8); the operating handle (9-8) realizes T by the clamp spring (9-7). Shape clamp head (9-6) action.

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