CN111504372A - Experimental device for analyzing assembling relation of contact elements of electric connector and experimental method based on experimental device - Google Patents
Experimental device for analyzing assembling relation of contact elements of electric connector and experimental method based on experimental device Download PDFInfo
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- CN111504372A CN111504372A CN202010313284.5A CN202010313284A CN111504372A CN 111504372 A CN111504372 A CN 111504372A CN 202010313284 A CN202010313284 A CN 202010313284A CN 111504372 A CN111504372 A CN 111504372A
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
An experimental device for analyzing the assembling relation of contact elements of an electric connector and an experimental method based on the experimental device relate to the field of scientific instruments and electrical materials. The invention aims to test the contact characteristic parameters of the electric connector. The invention relates to an electric sliding table and two three-dimensional sliding tables which are fixed on the upper surface of a base, a pin fixture is fixed on the sliding end surface of the electric sliding table, a pin force sensor is used for detecting the insertion and extraction force between a pin test piece to be detected and a jack test piece to be detected, an angle table is fixed on the sliding end of one three-dimensional sliding table, the jack fixture is fixed on the movable end of the angle table, a support is fixed on the sliding end of the other three-dimensional sliding table, a push head of a motor is opposite to a preset position on the jack test piece to be detected and is used for pushing the jack test piece to be detected, a laser displacement sensor is used for collecting the deformation of the outer wall of the jack test piece to be detected, a jack force sensor is used for detecting the contact positive pressure of.
Description
Technical Field
The invention belongs to the field of scientific instruments and electrical materials, and particularly relates to an experimental device for assembling a contact element of an electric connector.
Background
With the development of aerospace engineering and electronic communication engineering, the electric connector is used as a basic element for transmitting electric signals and electric energy and is applied to systems more and more widely. The contact elements (pins and jacks) are integrated in the insulator of the electric connector, and the reliability of the whole system is directly influenced by the reliability of the contact performance of the contact elements. The reliability of a contact depends on many factors such as the design, process, manufacturing, management, raw material properties, and working environment of the contact. Therefore, analyzing the influence of the structure of the contact on the assembly relationship, the contact condition and the contact reliability has important significance for improving the reliability of the electric connector.
However, the research on the influence of the contact structure on the assembly relationship, the contact condition and the reliability and the change condition of the insertion force of the contact in the insertion and extraction process are mainly focused on methods such as theoretical analysis, simulation calculation analysis and the like, and no experimental device and method for relevant contact characteristic parameters (insertion force, jack deformation, contact positive pressure, friction coefficient, contact area and contact resistance) exist.
Disclosure of Invention
The invention provides an experimental device for analyzing the assembling relation of contact elements of an electric connector and an experimental method based on the experimental device, aiming at carrying out experiments on contact characteristic parameters of the electric connector.
An experimental apparatus for analyzing the fitting relationship of electrical connector contacts, comprising: the device comprises a base, electric sliding tables, a pin fixture, a pin force sensor, a support, an industrial camera, a jack fixture, a jack motor force sensor, an angle table, two three-dimensional sliding tables, a laser displacement sensor and a motor;
the electric sliding table and the two three-dimensional sliding tables are fixed on the upper surface of the base, the pin fixture is fixed on the sliding end surface of the electric sliding table and used for fixing a tested pin test piece, the electric sliding table can drive the tested pin test piece to reciprocate along the axis of the electric sliding table, the pin force sensor is used for detecting the insertion and extraction force between the tested pin test piece and a tested jack test piece, the angular position table is fixed on the sliding end surface of one three-dimensional sliding table, the jack fixture is fixed at the movable end of the angular position table and used for fixing the tested jack test piece, the bracket is fixed on the sliding end surface of the other three-dimensional sliding table and used for supporting the motor, the push head of the motor is opposite to the preset position on the tested jack test piece and used for pushing the tested jack test piece, the preset position is the middle point of the hole depth of the tested jack test piece, the jack force sensor is used for detecting the contact positive pressure of a tested jack test piece, and the industrial camera is used for acquiring dynamic images of the tested contact pin test piece and the tested jack test piece in the plugging and unplugging process.
The experimental method based on the experimental device comprises the following steps:
the method comprises the following steps: axially cutting the tested jack test piece, wherein the reserved part of the cross section is arc-shaped, and the radian of the arc is less than 180 degrees, and then fixing the tested contact pin test piece and the tested jack test piece on a contact pin clamp and a jack clamp respectively;
step two: starting a motor to enable a push head of the motor to push a preset position of the tested jack test piece, wherein the preset position is the midpoint of the depth of the inner wall of the tested jack test piece, simultaneously, detecting positive pressure F when the tested jack test piece is not plugged by using a jack force sensor, and detecting deformation of the outer wall when the tested jack test piece is not plugged by using a laser displacement sensor1The rigidity K of the tested jack test piece is obtained according to the following formula:
F＝K1；
step three: adjusting the three-dimensional sliding table and the angular table below the jack clamp until the axial line of the tested contact pin test piece displayed in the industrial camera is overlapped with the axial line of the tested jack test piece;
step four: starting the electric sliding table to enable the tested contact pin test piece and the tested jack test piece to perform plugging and unplugging movement, and simultaneously detecting the plugging and unplugging force F between the tested contact pin test piece and the tested jack test piece by using the contact pin force sensoriDetecting the positive pressure F when the tested jack test piece is plugged by using the jack force sensornUsing a laser displacement sensorDetecting the deformation of the outer wall of the tested jack test piece during plugging and unplugging, and obtaining the friction factor mu between the tested contact pin test piece and the tested jack test piece according to the following formula:
Ft＝μFn
wherein, FtIs the friction force between the tested pin test piece and the tested socket test piece, and Ft＝Fi；
Step five: stopping the electric sliding table to separate the tested contact pin test piece from the tested jack test piece, acquiring an image of the inner wall of the jack of the tested jack test piece by using an industrial camera, and obtaining the friction surface characteristic and the friction area of the tested jack test piece according to the image;
and sixthly, adjusting the three-dimensional sliding table and the angle table below the jack clamp until an included angle α between the axis of the tested contact pin test piece and the axis of the tested jack test piece displayed in the industrial camera is not equal to 0, repeating the step four and the step five, and obtaining the deformation, the plugging and unplugging force, the friction factor, the friction surface characteristic and the friction area of the outer wall when the tested jack test piece is plugged and unplugged when α is not equal to 0.
The experimental device for analyzing the assembling relation of the contact element of the electric connector and the experimental method based on the experimental device realize real-time observation and measurement of contact characteristic parameters in the plugging and unplugging process of the contact element, can quantitatively confirm the influence of design parameters, assembling size parameters and material coating process parameters of the contact element on the reliability of the electric connector, and can fundamentally know the problems of low plugging and unplugging service life of the electric connector and related electric contact failure of the electric connector.
In addition, the experimental device for analyzing the assembling relation of the contact element of the electric connector is convenient for replacing the contact element pin and jack test piece, and can be used for researching and determining the optimal matching combination of the electrical contact characteristics of the material.
Drawings
FIG. 1 is a front view of an experimental apparatus for analyzing the fitting relationship of contacts of an electrical connector according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic radial cross-sectional view of a pin specimen being tested inserted into a socket specimen being tested;
FIG. 4 is an axial cross-sectional view of the pin specimen being tested inserted into the socket specimen being tested when α ≠ 0.
Detailed Description
The first embodiment is as follows: referring to fig. 1 and 2, the present embodiment is described in detail, and the experimental apparatus for analyzing the assembling relationship of the contacts of the electrical connector according to the present embodiment includes: the device comprises a base 1, an electric sliding table 2, a pin fixture 3, a pin force sensor 4, a support 7, an industrial camera 8, a jack fixture 9, a jack motor force sensor 10, an angular position table 11, two three-dimensional sliding tables 12, a laser displacement sensor 13 and a motor 14.
A spatial rectangular coordinate system XYZ is established, wherein the surface of the base 1 is taken as the XY plane.
The electric sliding table 2 and the two three-dimensional sliding tables 12 are fixed on the upper surface of the base 1, the sliding end of the electric sliding table 2 can slide in a reciprocating manner along the X-axis direction, and the sliding end of the three-dimensional sliding table 12 can slide in a reciprocating manner along X, Y, Z directions; the position of the tested jack test piece 6 can be accurately adjusted by the design, and the axial radial deviation controllability of the tested contact pin test piece 5 and the tested jack test piece 6 is realized. Pin anchor clamps 3 are fixed on the slip end of electronic slip table 2, and pin anchor clamps 3 are used for fixed contact pin test piece 5 of being surveyed for electronic slip table 2 can drive contact pin test piece 5 of being surveyed along X axis reciprocating motion, and contact pin test piece 5 of being surveyed links to each other with pin anchor clamps 3 through contact pin force sensor 4, makes contact pin force sensor 4 can be used for detecting the plug power between contact pin test piece 5 of being surveyed and the jack test piece 6 of being surveyed.
The angle station 11 is fixed on the sliding end of a three-dimensional sliding table 12, the angle station 11 is provided with an arc guide rail and an adjusting knob on an XY plane, the movable end of the angle station 11 can swing in the XY plane, the angle position of the tested jack test piece 6 can be accurately adjusted through the structure, the included angle α between the tested pin test piece 5 and the tested jack test piece 6 is controllable, the jack clamp 9 is fixed at the movable end of the angle station 11, and the jack clamp 9 is used for fixing the tested jack test piece 6.
The bracket 7 is fixed on the sliding end of the other three-dimensional sliding table 12 and is used for supporting the motor 14; the push head of the motor 14 is opposite to a preset position on the tested jack test piece 6 and is used for pushing the tested jack test piece 6, the preset position is the middle point of the hole depth of the tested jack test piece 6, namely the center of the tested jack test piece 6, the laser displacement sensor 13 is used for collecting the deformation of the outer wall of the tested jack test piece 6, and the jack force sensor 10 is used for detecting the contact positive pressure of the tested jack test piece 6.
The industrial camera 8 is used for acquiring images of the pin test piece 5 and the jack test piece 6 to be tested, including a dynamic image of the pin test piece and the jack test piece in the plugging and unplugging process and an inner wall image of the jack test piece 6 to be tested in the non-plugging and unplugging process.
In the connection relation, the jack clamp 9 and the tested jack test piece 6, the pin clamp 3 and the tested pin test piece 5, the angle table 11 and the three-dimensional sliding table 12, the jack clamp 9 and the angle table 11, and the bracket 7 and the motor 14 are in threaded connection.
The surface of the pusher of the motor 14 is a smooth spherical surface with a radius of curvature of 1mm, and the pusher is made of a material with the highest possible rigidity. When the motor 14 is started, the tested jack test piece 6 can be pushed by the push head to deform.
The second embodiment is as follows: this embodiment will be described in detail with reference to fig. 3 and 4, and is an experimental method based on an experimental apparatus according to the embodiment, including the steps of:
the method comprises the following steps: the tested jack test piece 6 is axially cut, the reserved part of the cross section is arc-shaped, and the radian of the arc is less than 180 degrees, so that the friction surface characteristics and the friction area of the inserted and pulled contact piece can be conveniently observed by using the industrial camera 8; and then fixing the tested pin test piece 5 and the tested jack test piece 6 on the pin clamp 3 and the jack clamp 9 respectively.
Step two: adjusting the three-dimensional sliding table 12 below the motor 14 to enable a push head of the motor 14 to be opposite to a preset position on the tested jack test piece 6, wherein the preset position is a midpoint of the depth of the inner wall of the tested jack test piece 6; starting the motor 14 to enable the push head of the motor 14 to push the preset position of the tested jack test piece 6, simultaneously, detecting the positive pressure F when the tested jack test piece 6 is not plugged by using the jack force sensor 10, and detecting the positive pressure F by using the laser displacement sensor 13Deformation of outer wall of tested jack test piece 6 without plugging1The rigidity K of the jack test piece 6 to be tested is obtained according to the following formula:
F＝K1。
and step three, adjusting the three-dimensional sliding table 12 and the angular position table 11 below the jack clamp 9 until the axis of the tested pin test piece 5 and the axis of the tested jack test piece 6 displayed in the industrial camera 8 are mutually overlapped, namely, the included angle α between the axes is 0.
Step four: starting the electric sliding table 2 to enable the tested pin test piece 5 and the tested jack test piece 6 to be subjected to plugging and unplugging movement, wherein the tested pin test piece 5 and the tested jack test piece 6 can be completely plugged or unplugged in the plugging and unplugging process; meanwhile, the pin force sensor 4 is used for detecting the insertion and extraction force F between the tested pin test piece 5 and the tested jack test piece 6iDetecting the positive pressure F when the tested jack test piece 6 is inserted and pulled by using the jack force sensor 10nAnd detecting the deformation of the outer wall of the tested jack test piece 6 when the tested jack test piece 6 is plugged and unplugged by using the laser displacement sensor 13, and obtaining the friction factor mu between the tested contact pin test piece 5 and the tested jack test piece 6 according to the following formula:
Ft＝μFn
wherein, FtIs the friction force between the pin specimen 5 and the socket specimen 6 to be tested, and Ft＝Fi。
Step five: stopping the electric sliding table 2, separating the tested contact pin test piece 5 from the tested jack test piece 6, acquiring an image of the inner wall of the jack of the tested jack test piece 6 by using an industrial camera 8, and obtaining the friction surface characteristic and the friction area of the tested jack test piece 6 by using a maximum between-class variance segmentation algorithm according to the image;
and sixthly, adjusting the three-dimensional sliding table 12 and the angle table 11 below the jack clamp 9 until an included angle α between the axis of the tested pin test piece 5 displayed in the industrial camera 8 and the axis of the tested jack test piece 6 is not equal to 0, repeating the fourth step and the fifth step, and obtaining the deformation, the insertion and extraction force, the friction factor, the friction surface characteristics and the friction area of the outer wall when the tested jack test piece 6 is inserted and extracted when α is not equal to 0.
In the process of the experiment, constant current of 100mA is applied to the tested pin test piece 5 and the tested jack test piece 6 at the same time, and a four-wire method loop is externally connected, so that the dynamic contact resistance between the tested pin test piece 5 and the tested jack test piece 6 in the plugging process can be measured.
The two embodiments are used for researching the influence of the contact element structure on the assembly relation, the contact condition and the reliability, the position of the contact element test piece is adjusted through the hardware structure, the parameter setting is carried out, the contact element plugging and unplugging process is realized, the deformation of the jack test piece in the plugging and unplugging process is obtained through the laser displacement sensor, the friction surface characteristic and the friction area of the contact element are obtained through the industrial camera, different contact element materials are obtained and compared, the influence of parameters such as the contact element axis included angle α and the axis radial deviation s on the contact condition and the reliability of the contact element can be compared in the plugging and unplugging process.
Claims (8)
1. An experimental apparatus for analyzing the fitting relationship of electrical connector contacts, comprising: the device comprises a base (1), electric sliding tables (2), a pin fixture (3), a pin force sensor (4), a support (7), an industrial camera (8), a jack fixture (9), a jack motor force sensor (10), an angular position table (11), two three-dimensional sliding tables (12), a laser displacement sensor (13) and a motor (14);
the electric sliding table (2) and the two three-dimensional sliding tables (12) are fixed on the upper surface of the base (1),
the pin fixture (3) is fixed on the sliding end surface of the electric sliding table (2), the pin fixture (3) is used for fixing a tested pin test piece (5), the electric sliding table (2) can drive the tested pin test piece (5) to reciprocate along the axis of the electric sliding table, the pin force sensor (4) is used for detecting the insertion and extraction force between the tested pin test piece (5) and the tested jack test piece (6),
the angle table (11) is fixed on the sliding end surface of a three-dimensional sliding table (12), the jack clamp (9) is fixed at the movable end of the angle table (11), the jack clamp (9) is used for fixing the tested jack test piece (6),
the support (7) is fixed on the sliding end face of another three-dimensional sliding table (12) and is used for supporting the motor (14), the push head of the motor (14) is right opposite to a preset position on the tested jack test piece (6) and is used for pushing the tested jack test piece (6), the preset position is a middle point of the hole depth of the tested jack test piece (6), the laser displacement sensor (13) is used for acquiring the deformation of the outer wall of the tested jack test piece (6), the jack force sensor (10) is used for detecting the contact positive pressure of the tested jack test piece (6),
the industrial camera (8) is used for acquiring dynamic images of the tested pin test piece (5) and the tested jack test piece (6) in the plugging process.
2. The experimental device for analyzing the assembling relation of the contact element of the electric connector according to claim 1, wherein the jack clamp (9) is in threaded connection with the tested jack test piece (6), the pin clamp (3) is in threaded connection with the tested pin test piece (5), the angle table (11) is in threaded connection with the three-dimensional sliding table (12), the jack clamp (9) is in threaded connection with the angle table (11), and the bracket (7) is in threaded connection with the motor (14).
3. An experimental apparatus for analyzing the fitting relationship of electrical connector contacts according to claim 1, wherein the pusher surface of the motor (14) is spherical and has a radius of curvature of 1 mm.
4. The experimental method based on the experimental device of claim 1, characterized by comprising the following steps:
the method comprises the following steps: axially cutting the tested jack test piece (6), wherein the reserved part of the cross section is arc-shaped, the radian of the arc is less than 180 degrees, and then fixing the tested contact pin test piece (5) and the tested jack test piece (6) on the contact pin clamp (3) and the jack clamp (9) respectively;
step two: starting the motor (14) to enable the push head of the motor (14) to push a preset position of the tested jack test piece (6), wherein the preset position is the midpoint of the depth of the inner wall of the tested jack test piece (6), meanwhile, detecting the positive pressure F when the tested jack test piece (6) is not plugged by using the jack force sensor (10), and detecting the deformation of the outer wall when the tested jack test piece (6) is not plugged by using the laser displacement sensor (13)1The rigidity K of the tested jack test piece (6) is obtained according to the following formula:
F＝K1；
step three: adjusting a three-dimensional sliding table (12) and an angular position table (11) below the jack clamp (9) until the axis of the tested contact pin test piece (5) displayed in the industrial camera (8) is coincident with the axis of the tested jack test piece (6);
step four: starting the electric sliding table (2) to enable the tested contact pin test piece (5) and the tested jack test piece (6) to perform plugging and unplugging movement, and meanwhile, detecting plugging and unplugging force F between the tested contact pin test piece (5) and the tested jack test piece (6) by using the contact pin force sensor (4)iThe positive pressure F of the tested jack test piece (6) during plugging is detected by using the jack force sensor (10)nDetecting the deformation of the outer wall of the tested jack test piece (6) during plugging and unplugging by using a laser displacement sensor (13), and obtaining the friction factor mu between the tested contact pin test piece (5) and the tested jack test piece (6) according to the following formula:
Ft＝μFn
wherein, FtIs the friction force between the tested contact pin test piece (5) and the tested jack test piece (6), and Ft＝Fi；
Step five: stopping the electric sliding table (2), separating the tested contact pin test piece (5) from the tested jack test piece (6), collecting an image of the inner wall of the jack of the tested jack test piece (6) by using an industrial camera (8), and obtaining the friction surface characteristic and the friction area of the tested jack test piece (6) according to the image;
sixthly, adjusting the three-dimensional sliding table (12) and the angle table (11) below the jack clamp (9) until an included angle α formed between the axis of the tested pin test piece (5) displayed in the industrial camera (8) and the axis of the tested jack test piece (6) is not equal to 0, repeating the fourth step and the fifth step, and obtaining the deformation, the plugging force, the friction factor, the friction surface characteristics and the friction area of the outer wall when the tested jack test piece (6) is plugged and unplugged when α is not equal to 0.
5. The experimental method as claimed in claim 4, wherein the tested pin specimen (5) and the tested socket specimen (6) can be completely inserted or pulled out during the plugging process.
6. The experimental method as claimed in claim 4, characterized in that the friction surface characteristics and the friction area of the tested jack test piece (6) are obtained by using a maximum between class variance segmentation algorithm.
7. The experimental method as claimed in claim 4, characterized in that during the experiment, a constant current of 100mA is applied to the pin test piece (5) and the socket test piece (6) to be tested for measuring the dynamic contact resistance between the pin test piece (5) and the socket test piece (6) to be tested during plugging.
8. The experimental method according to claim 4, wherein in the second step, the three-dimensional sliding table (12) below the motor (14) is firstly adjusted so that the pushing head of the motor (14) is opposite to the preset position on the tested jack test piece (6), and then the motor (14) is started.
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| CN202010313284.5A CN111504372A (en) | 2020-04-20 | 2020-04-20 | Experimental device for analyzing assembling relation of contact elements of electric connector and experimental method based on experimental device |
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| CN202010313284.5A CN111504372A (en) | 2020-04-20 | 2020-04-20 | Experimental device for analyzing assembling relation of contact elements of electric connector and experimental method based on experimental device |
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