CN106526325B - Nondestructive measurement tool for crimping resistance - Google Patents
Nondestructive measurement tool for crimping resistance Download PDFInfo
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- CN106526325B CN106526325B CN201611041301.4A CN201611041301A CN106526325B CN 106526325 B CN106526325 B CN 106526325B CN 201611041301 A CN201611041301 A CN 201611041301A CN 106526325 B CN106526325 B CN 106526325B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a nondestructive measurement tool with a simple structure, quick clamping and accurate measurement of wire crimping resistance, which comprises 2 clamp bodies and 1 external short-circuit piece, wherein the two clamp bodies have the same structure and comprise an upper bracket, a middle screwing assembly, a supporting assembly and a bottom base assembly, the bracket and the base assembly are connected in a bolt fastening mode, the middle screwing assembly is supported and fixed, an elastic pressing block is arranged at the bottom of a screw rod of the screwing assembly, and clamping force is applied to a measured wire by rotating the screw rod. The two clamp bodies are arranged side by side during working, and the two ends of the external short circuit piece are pressed by the elastic pressing blocks on the clamp body screwing assembly to realize connection. Adopts the spiral clamping principle to clamp the workpiece, realizes various lengths and various section diameters (0.08 mm) 2 ︿3mm 2 ) ) The wire crimp resistance of (c) is precisely measured.
Description
Technical Field
The invention relates to a nondestructive measurement tool for crimping resistance, in particular to a micro-resistance nondestructive measurement tool for a wire crimping piece, which can conveniently measure the resistance of the crimping piece in aerospace products.
Background
In the aerospace field, crimping refers to a connection method in which a wire is plastically deformed at normal temperature by a cold-press crimping tool or equipment to form a metal combination. The crimp resistor is an important parameter for representing the electrical performance of the crimp connection, and unsuitable crimp resistor is a main reason for temperature rise in the operation of the electric connector, and whether the crimp resistor exceeds the standard directly affects the stability and the reliability of the operation of the electronic equipment. The testing range of the crimping resistor is milliohm level or microohm level, most of the current milliohm meter is adopted for measurement, and as the milliohm meter probe has smaller volume, the manual connection of the milliohm meter probe and the measured point is time-consuming, and meanwhile, the insulation sheath layer of the wire subjected to crimping needs to be stripped for destructive measurement, and the measuring mode is influenced by the easy oxidization of the milliohm meter measuring instrument probe and limited by the functions of the milliohm meter measuring instrument, and has the defects of low measuring efficiency, inaccurate measuring data and poor repeatability.
Disclosure of Invention
The invention provides a nondestructive measurement tool for measuring the crimping resistance of a wire, which has a simple structure, is fast clamped and accurately measures the crimping resistance of the wire, clamps a workpiece by adopting a spiral clamping principle, and realizes the purposes of various lengths and various section diameters (0.08 mm) 2 ︿3mm 2 ) ) Precisely measuring the wire crimping resistance; the specific clamp scheme is as follows:
the tool comprises 2 clamp bodies and 1 external short-circuit piece, wherein the two clamp bodies are identical in structure, are placed side by side in working, and are connected by pressing two ends of the external short-circuit piece through elastic pressing blocks on screwing assemblies of the clamp bodies. The clamping device comprises a clamping device body, a wire core and a wire core, wherein the clamping device body is used for clamping a metal crimping end of a wire, and the clamping device body is used for clamping the other wire core end of the wire. The fixture body comprises an upper bracket, a middle screwing assembly, a supporting assembly and a bottom base assembly, wherein the fixture body is a portal frame type supporting structure, the bracket and the base assembly are connected in a bolt fastening mode, the middle screwing assembly is supported and fixed, an elastic pressing block is installed at the bottom of a screw rod of the screwing assembly, and clamping force is applied to a tested wire through a rotating screw rod.
The upper bracket is of a prolate strip structure and made of metal, two ends of the bracket are symmetrically provided with 2 bolt through holes, and 1 large hole for the screwing assembly to pass through is formed in the center of the bracket and used for supporting and fixing the screwing assembly.
The middle screwing assembly consists of 1 dish-shaped nut, a sleeve, a screwing screw, an elastic pressing block, a cylindrical pin and a screw; the outer circle of the disc nut is provided with 2 butterfly-shaped lugs, the bottom of the outer circle is provided with 2 annular bosses, the center of the outer circle is provided with a trapezoid threaded through hole, the outer circle is connected with a screwing screw rod by trapezoid threads, and the bottom bosses are embedded into a half open slot at the top of the sleeve to be connected with the sleeve; the sleeve is cylindrical, the top end of the sleeve is provided with 1 annular groove with a half opening, the center of the sleeve is provided with a through hole, the middle part of the sleeve is provided with a radial threaded hole, the top of the screw rod is connected with the disc nut and then penetrates through the central through hole of the sleeve, and the screw rod is inserted into the straight slot of the screw rod through the sleeve to limit the screw rod to move up and down in a straight line; the screw is T-shaped, the upper part of the screw is an oblong boss, the end face of the boss is provided with an oblong groove, and the appearance of the boss is consistent with that of the elastic pressing block and is used for embedding the elastic pressing block; the appearance of the elastic pressing block is oblong, the height of the elastic pressing block protrudes out to screw the end face of the concave table of the screw rod by 2mm, the screw rod is fixed with the elastic pressing block by using a cylindrical pin, the elastic pressing block is made of hard rubber, the elastic pressing block has good insulativity, and the influence of contact resistance on measurement can be reduced. When the screw rod clamping device works, the disc nut is rotated to drive the screw rod to be screwed to change the rotary motion into linear motion, and the method of reducing and expanding the compaction space is used for realizing the rapid clamping and withdrawing of the reverse screw rod.
The middle support component consists of 2 support sleeves, 2 sets of bolts, a spring pad and a nut and is used for supporting the support. The 2 support sleeves are positioned between the upper support and the lower base component, and the base component, the support sleeves, the elastic pad for the support and the nuts are fastened into a whole by bolts.
The base assembly comprises 1 base body, limiting plate, clamping block, 2 measurement interfaces and 4 bolts, spring pads and nuts for supporting the whole clamp body. The base body and the limiting plate are made of glass fiber reinforced plastic materials, effective insulation with a conductor is ensured, the base body is of a T-shaped structure, the upper part is a boss, the lower part is a rectangular bottom plate, the length and the width of the boss are consistent with those of the bracket, 2 symmetrical through holes are formed in two sides of the boss, 1 groove is formed in the middle of the boss, the appearance is consistent with that of the clamping block and is used for embedding the clamping block, 2 through holes are formed in the bottom plate of the base body, the limiting plate is fastened by using a spring pad and a nut through bolts, and 2 through holes are formed in the boss of the base body; the limiting plate is of an L-shaped structure, the side surface of the limiting plate is used for blocking the clamping blocks and the lead wires, the placing position of each wire can be controlled to be consistent, 2 through holes are formed in the bottom surface of the limiting plate, and the limiting plate is fastened with the base body through bolts; the clamping block is made of pure copper and gold-plated, has good conductivity, zero resistance and a T-shaped shape with a wide upper part and a narrow lower part, two sides of the upper end face are symmetrically provided with 2 through holes, a tool measurement interface gold-plated binding post penetrates through the holes and is fastened on the clamping block by a spring pad and a nut, 3V-shaped through grooves with different lengths are formed in the upper end face of the clamping block, and the cross section of each V-shaped through groove can accommodate a cross section of 0.08mm 2 ︿3mm 2) The V-shaped groove length accommodates the 3 types of lengths of the metal crimping end, so that the requirements of various lengths and various section diameters of the metal crimping terminal can be met; the 2 measuring interfaces are composed of 2 gold-plated binding posts, and the gold-plated binding posts can rotationally compress a measuring line of the measuring instrument and an external short-circuit piece.
The external short circuit piece is a strip-shaped sheet, the material is a pure copper gold-plated piece, the resistance is zero, and 2 open slots are symmetrically formed at two ends of the external short circuit piece, so that the external short circuit piece is convenient to bridge on a measuring interface of the clamp body.
Compared with the milliohmmeter probe measuring mode, the tool is simple in structure, convenient to operate, high in universality and higher in precision; and only the clamping blocks are required to be replaced, so that the crimping terminal with different section diameters and lengths can be adapted; the elastic pressing block is adopted to enable the workpiece to be tightly pressed, the clamping end is in good contact with the workpiece, current is uniformly distributed in the tested wire core, the influence of contact resistance on measurement is reduced, and the measurement accuracy is ensured; the fast clamping and withdrawing mechanism of the reverse and forward screw is utilized, so that the use is more convenient and flexible.
Drawings
FIG. 1 is a schematic diagram of the front structure of a fixture body;
FIG. 2 is a schematic view of the reverse side structure of the clamp body;
FIG. 3 is a longitudinal cross-sectional view of the clamp body;
FIG. 4 is a schematic diagram of a nondestructive measurement tool for crimping resistance.
1-dish nut, 2-bracket, 3-sleeve, 4-screwing screw, 5-cylindrical pin, 6-clamping block, 7-base body, 8-bolt, 9-spring pad, 10-nut, 11-supporting sleeve, 12-measuring interface, 13-elastic press block, 14-screw tightening screw, 15-limit plate, 16-external short-circuit piece.
Detailed Description
The invention provides a nondestructive measurement tool for measuring the crimping resistance of a wire, which has a simple structure, is fast clamped and accurately measures the crimping resistance of the wire, clamps a workpiece by adopting a spiral clamping principle, and realizes the purposes of various lengths and various section diameters (0.08 mm) 2 ︿3mm 2 ) ) Precisely measuring the wire crimping resistance; the specific clamp scheme is as follows:
the tool comprises 2 clamp bodies and 1 external short-circuit piece, wherein the two clamp bodies are identical in structure, are placed side by side in working, and are connected by pressing two ends of the external short-circuit piece through elastic pressing blocks on screwing assemblies of the clamp bodies. The clamping device comprises a clamping device body, a wire core and a wire core, wherein the clamping device body is used for clamping a metal crimping end of a wire, and the clamping device body is used for clamping the other wire core end of the wire. The fixture body comprises an upper bracket, a middle screwing assembly, a supporting assembly and a bottom base assembly, wherein the fixture body is a portal frame type supporting structure, the bracket and the base assembly are connected in a bolt fastening mode, the middle screwing assembly is supported and fixed, an elastic pressing block is installed at the bottom of a screwing screw rod of the screwing assembly, and clamping force is applied to a tested wire through the screwing screw rod.
The upper bracket is of a prolate strip structure and made of metal, two ends of the bracket are symmetrically provided with 2 bolt through holes, and 1 large hole for the screwing assembly to pass through is formed in the center of the bracket and used for supporting and fixing the screwing assembly.
The middle screwing assembly consists of 1 dish-shaped nut, a sleeve, a screwing screw, an elastic pressing block, a cylindrical pin and a screw; the outer circle of the disc nut is provided with 2 butterfly-shaped lugs, the bottom of the outer circle is provided with 2 annular bosses, the center of the outer circle is provided with a trapezoid threaded through hole, the outer circle is connected with a screwing screw rod by trapezoid threads, and the bottom bosses are embedded into a half open slot at the top of the sleeve to be connected with the sleeve; the sleeve is cylindrical, the top end of the sleeve is provided with 1 annular groove with a half opening, the center of the sleeve is provided with a through hole, the middle part of the sleeve is provided with a radial threaded hole, the top of the screw rod is connected with the disc nut and then penetrates through the central through hole of the sleeve, and the screw rod is inserted into the straight slot of the screw rod through the sleeve to limit the screw rod to move up and down in a straight line; the screwing screw rod is T-shaped, the outer circle of the upper part is a thin cylinder, the outer circle of the upper part is a trapezoid thread, the lower part is provided with an oblong boss, and the end face of the boss is provided with an oblong groove for embedding an elastic pressing block; the appearance of the elastic pressing block is oblong, the height of the elastic pressing block protrudes out of the end face of the boss of the screw rod to be screwed, the screw rod to be screwed is fixed with the elastic pressing block through a cylindrical pin, and the elastic pressing block is made of hard rubber, so that the elastic pressing block has good insulativity, and the influence of contact resistance on measurement can be reduced. When the screw rod clamping device works, the disc nut is rotated to drive the screw rod to be screwed to change the rotary motion into linear motion, and the method of reducing and expanding the compaction space is used for realizing the rapid clamping and withdrawing of the reverse screw rod.
The middle support component consists of 2 support sleeves, 2 sets of bolts, a spring pad and a nut and is used for supporting the support. The 2 support sleeves are positioned between the upper support and the lower base component, and the base component, the support sleeves, the elastic pad for the support and the nuts are fastened into a whole by bolts.
The base assembly comprises 1 base body, limiting plate, clamping block, 2 measurement interfaces and 4 bolts, spring pads and nuts for supporting the whole clamp body. The base body and the limiting plate are made of glass fiber reinforced plastic materials, ensure effective insulation with the lead conductors, the base body is of a T-shaped structure, the upper part is a boss, the lower part is a rectangular bottom plate, the length and the width of the boss are consistent with those of the bracket,the two sides of the boss are symmetrically provided with 2 through holes, the middle of the boss is provided with 1 groove for embedding the clamping block, the base plate of the base body is provided with 2 through holes, the limiting plate is fastened by using a spring pad and a nut through bolts, and the boss of the base body is provided with 2 through holes; the limiting plate is of an L-shaped structure, the side surface of the limiting plate is used for blocking the clamping blocks and the lead wires, the placing position of each wire can be controlled to be consistent, 2 through holes are formed in the bottom surface of the limiting plate, and the limiting plate is fastened with the base body through bolts; the clamping block is made of pure copper and gold-plated, has good conductivity, zero resistance and a T-shaped shape with a wide upper part and a narrow lower part, two sides of the upper end face are symmetrically provided with 2 through holes, a tool measurement interface gold-plated binding post penetrates through the holes and is fastened on the clamping block by a spring pad and a nut, 3V-shaped through grooves with different lengths are formed in the upper end face of the clamping block, and the cross section of each V-shaped through groove can accommodate a cross section of 0.08mm 2 ︿3mm 2) The V-shaped groove length accommodates the 3 types of lengths of the metal crimping end, so that the requirements of various lengths and various section diameters of the metal crimping terminal can be met; the 2 measuring interfaces are composed of 2 gold-plated binding posts, and the gold-plated binding posts can rotationally compress a measuring line of the measuring instrument and an external short-circuit piece.
The external short circuit piece is a strip-shaped sheet, the material is a pure copper gold-plated piece, the resistance is zero, and 2 open slots are symmetrically formed at two ends of the external short circuit piece, so that the external short circuit piece is convenient to bridge on a measuring interface of the clamp body.
During the use process: the nondestructive measurement tool is connected with the crimping resistance measuring instrument through an electric signal, and the crimping resistance measuring instrument measures the crimping resistance of the lead through the nondestructive measurement tool.
Firstly, carrying out system zeroing, respectively connecting two test interfaces of the crimping resistance measuring instrument to the measurement interfaces of the two clamp bodies, and tightly pressing the gold-plated binding posts by screwing; then placing the two clamp bodies side by side, respectively bridging the measurement interfaces of the two clamp bodies by using an external short circuit piece, tightly screwing the gold-plated binding posts, starting the measuring instrument to carry out zero clearing treatment, and then removing the external short circuit piece; finally, carrying out system measurement, placing two ends of a single wire which is well pressed in the V-shaped groove of the clamp body clamping block, propping the top end of the wire against the limiting plate, and rotating the disc nut to enable the screw rod to be screwed together with the elastic pressing block to quickly press the two ends of the wire; and then, operating the measuring instrument to measure the resistance value of the whole wire which is well pressed.
Compared with the milliohmmeter probe measuring mode, the tool is simple in structure, convenient to operate, high in universality and higher in precision; and only the clamping blocks are required to be replaced, so that the crimping terminal with different section diameters can be adapted; the elastic pressing block is adopted to enable the workpiece to be tightly pressed, the clamping end is in good contact with the workpiece, current is uniformly distributed in the tested wire core, the influence of contact resistance on measurement is reduced, and the measurement accuracy is ensured; the fast clamping and withdrawing mechanism of the reverse and forward screw is utilized, so that the use is more convenient and flexible.
Claims (1)
1. The utility model provides a nondestructive measurement frock of crimping resistance, a serial communication port, including 2 anchor clamps body and 1 external short circuit piece, two anchor clamps body structures are the same, the anchor clamps body includes upper bracket, middle part screw subassembly, supporting component and bottom base subassembly, upper bracket and base subassembly are connected through middle part supporting component, middle part screw subassembly is fixed on the frame construction that upper bracket, base subassembly and middle part supporting component formed, external short circuit piece connects between two anchor clamps body, upper bracket is flat rectangular bar structure, metal material, 2 bolt via holes of support both ends symmetry distribution, there is 1 macropores that supply middle part to screw the subassembly to pass in its central point position; the middle screwing assembly consists of a disc nut, a sleeve, a screwing screw, an elastic pressing block, a cylindrical pin and a screw tightening screw; the outer circle of the disc nut is provided with 2 butterfly-shaped lugs, the bottom of the outer circle is provided with 2 annular bosses, the center of the outer circle is provided with a trapezoid threaded through hole, the butterfly-shaped lugs are connected with the screw rod by trapezoid threads, and the butterfly-shaped nuts are embedded into half open grooves at the top of the sleeve through the bosses at the bottom and are connected with the sleeve; the sleeve is cylindrical, the top end of the sleeve is provided with a semi-open annular groove, the center of the sleeve is provided with a through hole, the middle of the sleeve is provided with a radial threaded hole, the top of the screw rod is connected with the disc nut and then penetrates through the central through hole of the sleeve, and the screw rod is inserted into the straight slot of the screw rod through the sleeve; the screw is T-shaped, the upper part of the screw is an oblong boss, the end face of the boss is provided with an oblong groove, and the appearance of the boss is consistent with that of the elastic pressing block; the elastic pressing block is in an oblong shape, the height of the elastic pressing block protrudes out of the end face of the concave table of the screwing screw rod by 2mm, the screwing screw rod is fixedly connected with the elastic pressing block through a cylindrical pin, and the cylindrical pin is made of hard rubber; the support assembly consists of 2 support sleeves, 2 sets of bolts, elastic pads and nuts, wherein the 2 support sleeves are positioned between the upper support and the lower base assembly, and the base assembly, the support sleeves, the elastic pads and the nuts for the support are fastened into a whole by the bolts; the base assembly consists of 1 base body, a limiting plate, a clamping block, 2 measuring interfaces, 4 bolts, elastic pads and nuts, wherein the base body and the limiting plate are made of glass fiber reinforced plastic, the base body is of a T-shaped structure, the upper part of the base body is a boss, the lower part of the base body is a rectangular bottom plate, the length and the width of the boss are consistent with those of a bracket, 2 symmetrical through holes are formed in two sides of the boss, 1 groove is formed in the middle of the boss, the appearance is consistent with that of the clamping block, 2 through holes are formed in the bottom plate of the base body, the bolts fasten the limiting plate by the elastic pads and the nuts, and 2 through holes are formed in the boss of the base body; the limiting plate is of an L-shaped structure, 2 through holes are formed in the bottom surface of the limiting plate, and the limiting plate is fastened with the base body through bolts; the clamping block is made of pure copper and gold-plated, the resistor is zero, the appearance is T-shaped with wide upper part and narrow lower part, 2 through holes are symmetrically distributed on two sides of the upper end face, a tool measurement interface gold-plated binding post penetrates through the through holes on two sides of the upper end face and is fastened on the clamping block by using elastic pads and nuts, and 3V-shaped through grooves with different lengths are formed in the upper end face of the clamping block; the 2 measuring interfaces consist of 2 gold-plated binding posts, and the gold-plated binding posts rotationally compress a measuring line of the measuring instrument and an external short-circuit piece; the external short circuit piece is a strip-shaped sheet, the material is a pure copper gold-plated piece, the resistance is zero, two ends of the external short circuit piece are symmetrically provided with 2 open slots, and the external short circuit piece is bridged on a measuring interface of the clamp body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041301.4A CN106526325B (en) | 2016-11-21 | 2016-11-21 | Nondestructive measurement tool for crimping resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041301.4A CN106526325B (en) | 2016-11-21 | 2016-11-21 | Nondestructive measurement tool for crimping resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106526325A CN106526325A (en) | 2017-03-22 |
| CN106526325B true CN106526325B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611041301.4A Active CN106526325B (en) | 2016-11-21 | 2016-11-21 | Nondestructive measurement tool for crimping resistance |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771613B (en) * | 2016-11-21 | 2019-02-22 | 北京航天新风机械设备有限责任公司 | A kind of cable crimping resistance nondestructive measurement system |
| CN108318713B (en) * | 2018-01-30 | 2020-11-03 | 兰州大学 | Contact resistance test clamping device based on pressure adjustment clamping area and quantity |
| CN108918592B (en) * | 2018-04-25 | 2023-10-03 | 国网湖北省电力有限公司经济技术研究院 | Modular measurement device for lightning-proof grounding material of power system and application method |
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| CN103217580A (en) * | 2012-01-19 | 2013-07-24 | 福特全球技术公司 | Non-destructive evaluation methods for electric joints |
| CN104749439A (en) * | 2015-04-17 | 2015-07-01 | 武汉大学 | Powder metallurgy sintered alloy sample conductivity measurement system and powder metallurgy sintered alloy sample conductivity measurement method |
| CN206331044U (en) * | 2016-11-21 | 2017-07-14 | 北京航天新风机械设备有限责任公司 | One kind crimping resistance nondestructive measurement frock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87207140U (en) * | 1987-06-04 | 1988-03-09 | 王存志 | Nondestructive testing device for nonlinear resistance |
| JPH03107772A (en) * | 1989-09-22 | 1991-05-08 | Japan Synthetic Rubber Co Ltd | Resistance measuring device |
| CN201837647U (en) * | 2010-11-08 | 2011-05-18 | 中国计量学院 | Fixture for testing impedance |
| CN102142622A (en) * | 2010-12-06 | 2011-08-03 | 中建工业设备安装有限公司 | Damage-free connection device between leads with different diameters |
| CN103217580A (en) * | 2012-01-19 | 2013-07-24 | 福特全球技术公司 | Non-destructive evaluation methods for electric joints |
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| CN106526325A (en) | 2017-03-22 |
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