CN212965163U - Test fixture and resistance testing device - Google Patents
Test fixture and resistance testing device Download PDFInfo
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- CN212965163U CN212965163U CN202021807077.7U CN202021807077U CN212965163U CN 212965163 U CN212965163 U CN 212965163U CN 202021807077 U CN202021807077 U CN 202021807077U CN 212965163 U CN212965163 U CN 212965163U
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Abstract
The utility model discloses a test fixture and a resistance test device; wherein, test fixture includes: a substrate, and mounted on the substrate: pre-clamping mechanism and clamping mechanism. The pre-clamping mechanism comprises at least two pre-clamping pieces, and any pre-clamping piece forms a pre-clamping space for clamping a piece to be tested; the clamping mechanism comprises measurement clamping pieces which are arranged in pairs, and any one of the measurement clamping pieces is provided with a clamping space for clamping the piece to be measured; the pair of measuring clamping pieces enclose a measuring space; the clamping mechanism is provided with at least two pre-clamping pieces which are respectively arranged at two sides of the measuring space and used for clamping the piece to be measured, and the measuring clamping pieces are used for clamping the measuring state of the piece to be measured. The accuracy of the length to be measured in the clamping process is improved, the accuracy of conductivity measurement is further improved, and the influence on the judgment of a final finished product is avoided.
Description
Technical Field
The utility model relates to a test technical field, concretely relates to test fixture and resistance testing device.
Background
Conductivity, also known as conductivity, is a measure of how strong a substance is able to transmit an electric current. When a voltage is applied across the conductors, the charge carriers behave in a certain direction, thereby generating a current.
The conductivity of the lead is one of important test parameters for testing whether the produced lead meets the requirements of finished products, and the measurement of the conductivity is usually adopted, the resistance of the lead with a certain length is usually measured by a measuring device, the resistivity of the lead is obtained by measuring the thickness of the obtained lead, the conductivity is finally obtained by calculating the resistivity, and the comparison with a preset standard is carried out to finally obtain whether the produced lead meets the requirements of the finished products.
In the existing conductivity test process, when the length is determined, a pair of clamping jaws is commonly used for clamping a lead, but because the torsion resistance of a thick copper-clad steel lead is large and the lead has a certain radian during production, in the straightening and clamping process, the theoretically measured length is usually not equal to the actually measured length, so that the length of the measured lead cannot be determined, and further the measured conductivity has errors, and the final finished product judgment is influenced.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to solve the technical problem that in the conductivity test process among the prior art, because there is certain radian in the antitorque big just production process of thicker copper clad steel wire, consequently at the tight in-process of flare-out clamp, the length of measurand wire can't be confirmed, and then leads to measuring conductivity to have the error, influences the problem that final finished product judged.
Therefore, the utility model provides a test fixture, include:
the method comprises the following steps: a substrate, and mounted on the substrate:
the pre-clamping mechanism comprises at least two pre-clamping pieces, and any pre-clamping piece forms a pre-clamping space for clamping the piece to be tested;
the clamping mechanism comprises measurement clamping pieces which are arranged in pairs, and any one of the measurement clamping pieces is provided with a clamping space for clamping the piece to be measured; the pair of measuring clamping pieces enclose a measuring space;
the clamping mechanism is provided with at least two pre-clamping pieces which are respectively arranged at two sides of the measuring space and used for clamping the piece to be measured, and the measuring clamping pieces are used for clamping the measuring state of the piece to be measured.
Optionally, in the test fixture, any one of the measuring clamping members includes a pair of measuring teeth, and the pair of measuring teeth are arranged oppositely; the clamping space is a space surrounded by tooth tips opposite to the measuring teeth;
in the measuring state, the contact between the tooth point of the measuring tooth and the piece to be measured is point contact, or the contact between the tooth point of the measuring tooth and the piece to be measured is line contact.
Optionally, in the test fixture, the measuring teeth include a positioning surface and a bending surface, and the positioning surface and the bending surface intersect at a point where a tooth tip of the measuring teeth is located or a line where the tooth tip is located;
the positioning surface is perpendicular to the length direction of the piece to be measured; the positioning surfaces of the pair of measuring teeth of any one measuring clamping piece are arranged in a coplanar mode.
Optionally, the test fixture described above,
still include actuating mechanism, actuating mechanism includes:
the driving end of the first driving piece is connected with the measuring clamping piece and used for driving the measuring clamping piece to clamp the piece to be measured.
Optionally, in the test fixture, the pre-clamping member includes at least one pair of pre-clamping teeth, the pair of pre-clamping teeth are staggered, and the pre-clamping space is a space surrounded by tooth tips of the pair of pre-clamping teeth;
the driving mechanism further comprises
The driving end of the second driving piece is connected with the pre-clamping piece and used for driving the clamping of the pre-clamping piece;
and the driving end of the third driving piece is connected with the pre-clamping piece, and the third driving piece drives the pre-clamping piece to stretch the piece to be tested along the length direction of the piece to be tested towards the direction far away from the measuring space.
A resistance testing device comprising: the measuring mechanism is used for testing the resistance of the piece to be tested, which is arranged in the measuring space along the length extension direction of the piece to be tested.
The technical scheme provided by the utility model, following advantage has:
1. the utility model provides a test fixture, include: pre-clamping mechanism and clamping mechanism. The pre-clamping mechanism comprises at least one pair of pre-clamping pieces, and the pre-clamping pieces form a pre-clamping space for clamping the piece to be tested; the clamping mechanism comprises measurement clamping pieces which are arranged in pairs, and the measurement clamping pieces are provided with clamping spaces for clamping the pieces to be measured; the pair of measuring clamping pieces enclose a measuring space, and at least two pre-clamping pieces are arranged on two sides of the measuring space respectively.
The test fixture of this structure, it presss from both sides the setting in space through at least a pair of clamp in advance to press from both sides the mechanism in advance, the realization is to the wire centre gripping in advance, guarantee to await measuring the piece totally by folder centre gripping back in advance, again by fixture's measurement holder fixed length centre gripping, through the fixed length centre gripping in the measurement space, the realization is to the injecing of measuring length, thereby avoid because the piece that awaits measuring is too thick, or the antitorque reason such as great of the antitorque of a piece material that awaits measuring, and lead to carrying out the problem of the test length centre gripping of injecing to the wire, improve the accuracy of length measurement to await measuring among the clamping process, and then improve the.
2. In the test fixture provided by the utility model, any one of the measuring clamping pieces comprises a pair of measuring teeth, and the pair of measuring teeth are arranged oppositely; the clamping space is a space surrounded by tooth tips opposite to the measuring teeth; in the measuring state, the contact between the tooth point of the measuring tooth and the piece to be measured is point contact, or the contact between the tooth point of the measuring tooth and the piece to be measured is line contact.
Whether point contact or line contact is adopted, the length of the measured actual resistance can be ensured to be obtained through the relative distance between the two measuring clamping pieces, namely point-point, point-line or line-line distance, so that the measurement length of the actual resistance of the actual piece to be measured can be further improved, and the measurement accuracy is further improved.
3. The utility model provides a test fixture sets up through locating surface and a length direction that awaits measuring perpendicularly, guarantees the convenience of using the installation in the positioning process, makes things convenient for the user of service to confirm the position through the locating surface when installing on the one hand in the use, and on the other hand confirms actual measurement length through the locating surface, further improves measurement accuracy. The coplanarity of the positioning surfaces of the pair of measuring teeth of any one measuring clamping piece is arranged, so that when the length is measured, the two weighed ends are reliably clamped by the measuring teeth, and the problem that the length cannot be determined due to the clamping dislocation of the measuring teeth is avoided.
4. The utility model provides a test fixture is used for the drive to measure the motion of holder through the first driving piece among the actuating mechanism, further improves the convenience of actual operation, and operating personnel can realize measuring the centre gripping of holder to the piece that awaits measuring through operating first driving piece.
Similarly, the second driving part drives the pre-clamping piece to improve convenience of actual operation, and an operator can clamp the to-be-tested piece by the pre-clamping piece by operating the second driving part.
Through the setting of third driving piece, can be before first driving piece drive, after the folder centre gripping piece that awaits measuring in advance has been driven to the second driving piece, carry out certain tensile to the piece that awaits measuring, realize straightening to the piece that awaits measuring, when guaranteeing follow-up first driving piece through measuring the centre gripping of holder to the piece that awaits measuring, the piece that awaits measuring is in the state of straightening, further improves the accurate nature of actual measurement length.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test fixture provided in embodiment 1;
FIG. 2 is a schematic view of a pre-clamping member provided in embodiment 1;
FIG. 3 is a schematic view of the structure of a measuring holder provided in embodiment 1;
description of reference numerals:
1-a substrate;
21-first pre-clamping teeth; 22-second pre-clamping teeth; 23-a third pre-clamping tooth; 24-a fourth pre-clamping tooth; 25-tooth pairs;
31-a first measuring tooth; 32-a second measuring tooth; 33-a third measuring tooth; 34-a fourth measuring tooth; 35-a positioning surface; 36-bending surface;
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a testing fixture, as shown in fig. 1 to 3, including: the device comprises a substrate 1, a pre-clamping mechanism, a clamping mechanism and a driving mechanism. The pre-clamping mechanism and the clamping mechanism are both arranged on the substrate 1, and the driving mechanism drives the clamping mechanism and the pre-clamping mechanism to move. The pre-clamping mechanism comprises two pre-clamping pieces, and the pre-clamping pieces form a pre-clamping space for clamping the piece to be tested; the clamping mechanism comprises measurement clamping pieces which are arranged in pairs, and any measurement clamping piece is provided with a clamping space for clamping the piece to be measured; the pair of measuring clamping pieces enclose a measuring space of the piece to be measured, and the two pre-clamping pieces are respectively arranged on two sides of the measuring space.
In other optional embodiments, the pre-clamping members may be arranged in two pairs and three pairs or more, and it is certainly ensured that any pre-clamping member is arranged at a position outside the measurement space, and at least two pre-clamping members arranged at two sides of the measurement space clamp the to-be-measured member.
As shown in FIG. 1, the measuring clamping piece comprises a pair of measuring teeth, the measuring teeth are oppositely arranged, and the clamping space is a space surrounded by opposite tooth tips of the measuring teeth. As shown in fig. 1, the measuring clamping mechanism includes a first measuring clamping member disposed on the left side and a second measuring clamping member disposed on the right side, wherein the first measuring clamping member includes: the first measurement tooth 31 and the second measurement tooth 32 of relative setting, the second measurement holder includes: a third measuring tooth 33 and a fourth measuring tooth 34 arranged opposite each other. The first measuring tooth 31 and the third measuring tooth 33 are arranged on the same side, and the second measuring tooth 32 and the fourth measuring tooth 34 are arranged on the other side; first measurement tooth 31 and third measurement tooth 33 are fixed to be set up on base plate 1, and second measurement tooth 32 and fourth measurement tooth 34 are connected with actuating mechanism's first driving piece respectively, and specifically, first driving piece is the slip table cylinder, realizes that drive second measurement tooth 32 and fourth measurement tooth 34 move towards being close to first measurement tooth 31 and third measurement tooth 33 direction to the realization is to the first measurement tooth 31 and the second measurement tooth 32 in, and the piece that awaits measuring in third measurement tooth 33 and the fourth measurement tooth 34 centre gripping.
Because the first driving piece is a sliding table cylinder, the first driving piece not only provides sliding power for the second measuring tooth 32 and the fourth measuring tooth 34, but also ensures the certainty of the sliding direction of the second measuring tooth 32 and the third measuring tooth 33, and further improves the reliability of in-place clamping.
As shown in FIG. 2, each measuring tooth comprises a positioning surface 35 and a bending surface 36, and the positioning surface 35 and the bending surface 36 intersect to form the tooth tip of the measuring tooth. In this embodiment, the abutment between the tooth tip of the measuring tooth and the workpiece is point contact. In this embodiment, the positioning surface 35 is perpendicular to the length direction of the to-be-measured member; and the positioning surfaces 35 of the first measuring tooth 31 and the second measuring tooth 32 are arranged in a coplanar manner, and the positioning surfaces 35 of the third measuring tooth 33 and the fourth measuring tooth 34 are also arranged in a coplanar manner. As shown in fig. 2, the first measuring tooth 31 and the second measuring tooth 32 in the present embodiment are rotationally symmetric in a top view; the third measuring tooth 33 and the fourth measuring tooth 34 are also arranged rotationally symmetrically in a top view similar to fig. 2.
The test fixture that this embodiment provided, through locating surface 35 with the perpendicular setting of a length direction that awaits measuring, guarantee the convenience of using the installation among the positioning process, make things convenient for the user of service to confirm the position through locating surface 35 during the installation on the one hand in the use, on the other hand passes through locating surface 35 and confirms actual measurement length, further improves measurement accuracy. The coplanarity of the positioning surfaces 35 of the pair of measuring teeth of any one measuring clamping piece is arranged, so that when the length is measured, the two weighed ends are reliably clamped by the measuring teeth, and the problem that the length cannot be determined due to the clamping dislocation of the measuring teeth is avoided.
As shown in fig. 1, the pre-clamping mechanism includes a first pre-clamping member and a second pre-clamping member. Wherein the first pre-clamping piece comprises a first pre-clamping tooth 21 and a second pre-clamping tooth 22, and the second pre-clamping piece comprises a third pre-clamping tooth 23 and a fourth pre-clamping tooth 24.
As shown in fig. 3, any one pair of pre-clamping teeth includes five pairs of teeth 25, specifically, the first pre-clamping tooth 21 and the second pre-clamping tooth 22 include five pairs of teeth 25, the tooth tips of any one pre-clamping tooth are arranged in a plane, for example, the plane where the tooth tip of the first pre-clamping tooth 21 is located is a first plane, the plane where the tooth tip of the second pre-clamping tooth 22 is located is a second plane, and the pre-clamping space of the first pre-clamping piece is a space enclosed by the first plane and the second plane. Similarly, the tips of the third pre-clamping tooth 23 and the fourth pre-clamping tooth 24 form a third plane and a fourth plane respectively, and the pre-clamping space of the second pre-clamping piece is a space enclosed by the third plane and the fourth plane.
In this embodiment, the first pre-clamping tooth 21 and the third pre-clamping tooth 23 are disposed on the same side of the first measuring tooth 31 and the third measuring tooth 33, and the first pre-clamping tooth 21 and the third pre-clamping tooth 23 are both fixedly disposed on the substrate 1, and the first pre-clamping tooth 21, the third pre-clamping tooth 23, the first measuring tooth 31 and the third measuring tooth are disposed along the same direction, that is, in an extending direction of the device to be measured, specifically, it is ensured that a first plane and a third plane where tooth tips of the first pre-clamping tooth 21 and the third pre-clamping tooth 23 are located are disposed in a coplanar manner, and a point where tooth tips of the first measuring tooth 31 and the third measuring tooth 33 are located is on a plane where the first plane and the third plane are located.
The second pre-clamping teeth 22 and the fourth pre-clamping teeth 24 are respectively connected with a second driving part, the second driving part is a sliding table cylinder, the second pre-clamping teeth 22 and the fourth pre-clamping teeth 24 are driven to move towards the direction close to the first pre-clamping teeth 21 and the third pre-clamping teeth 23, and therefore clamping of a to-be-tested part in the first pre-clamping teeth 21 and the second pre-clamping teeth 22 and in the third pre-clamping teeth 23 and the fourth pre-clamping teeth 24 is achieved. Because the second driving piece is a sliding table cylinder, the second driving piece not only provides sliding power for the second pre-clamping teeth 22 and the fourth pre-clamping teeth 24, but also ensures the certainty of the sliding directions of the second pre-clamping teeth 22 and the third pre-clamping teeth 23, and further improves the reliability of in-place clamping.
In addition, the pre-clamping mechanism is further connected with a third driving piece of the driving mechanism, a driving end of the third driving piece is connected with the pre-clamping piece, and the third driving piece drives the pre-clamping piece to stretch the piece to be tested along the length direction of the piece to be tested towards the direction far away from the measurement space. Particularly, the third driving piece is the slip table cylinder, and particularly, the third driving piece drives the first pre-clamping tooth 21 and the second pre-clamping tooth 22 to slide towards the left side, so that when the second pre-clamping piece is fixed, the stretching of the piece to be tested can be realized.
From therefore, through the setting of third driving piece, can be before first driving piece drive, after the folder centre gripping piece that awaits measuring in advance has been driven to the second driving piece, carry out the tensile of certain degree to the piece that awaits measuring, realize straightening to the piece that awaits measuring, when guaranteeing follow-up first driving piece through measuring the centre gripping of holder to the piece that awaits measuring, the piece that awaits measuring is in the state of straightening, further improves the accuracy of actual measurement length.
According to the test fixture provided by the embodiment, the pre-clamping mechanism is used for pre-clamping the lead through the arrangement of at least one pair of pre-clamping spaces; and fixture's measurement holder carries out the fixed length centre gripping to the wire, through the fixed length centre gripping in the measurement space, realizes injecing measuring length to avoid because the piece that awaits measuring is too thick, or the antitorque reason such as great of the piece material that awaits measuring, and lead to the problem of the test length centre gripping of injecing to the wire, improve the accuracy to the length measurement that awaits measuring among the clamping process, and then improve the electric conductivity measuring precision, avoid judging to cause the influence to final finished product.
In an alternative embodiment, the abutment between the tooth tip and the piece to be measured can be line contact, and the positioning surface 35 and the bending surface 36 intersect at the line where the tooth tip of the measuring tooth is located. Whether point contact or line contact is adopted, the length of the measured actual resistance can be ensured to be obtained through the relative distance between the two measuring clamping pieces, namely point-point, point-line or line-line distance, so that the measurement length of the actual resistance of the actual piece to be measured can be further improved, and the measurement accuracy is further improved.
In an alternative embodiment, the third driving member may also drive the third pre-clamping tooth 23 and the fourth pre-clamping tooth 24 to slide towards the right, which also has the effect of driving the first pre-clamping member to move to the left as the third driving member drives the first pre-clamping member. Of course, in an alternative embodiment, the third driving member may simultaneously drive the first pre-clamping member to move leftward and the second pre-clamping member to move rightward, which also satisfies the stretching and straightening of the to-be-tested member.
In an alternative embodiment, the second drive member can drive the first pre-pinching teeth 21 and the third pre-pinching teeth 23 in motion, and similarly, the first drive member can also drive the first measuring teeth 31 and the third measuring teeth 33 in motion, as long as an accurate measurement of the length is ensured.
In an alternative embodiment, no drive can be provided, and the distance and position of the measuring clamp and the pre-clamping element can also be adjusted by manual adjustment. For example, a hand wheel is connected with pre-clamping teeth or measuring teeth to achieve a similar effect as the driving member.
Example 2
The present embodiment provides a resistance testing apparatus, including: a measuring mechanism and the test fixture in embodiment 1. The measuring mechanism is used for testing the resistance of the piece to be measured arranged in the measuring space along the length extending direction of the piece to be measured.
Specifically, in the embodiment, the device under test takes a copper-clad steel wire as an example, and the measuring mechanism includes a micro-ohmmeter for measuring the resistance.
Example 3
The embodiment provides a resistance testing method, which comprises the following steps:
s1: installation: the at least two pre-clamping pieces are arranged on the outer side of a measuring space formed by the two measuring clamping pieces;
s11: mounting a first measuring clamp and a second measuring clamp on a substrate 1
S12: the first pre-clamping piece is arranged on the left side of the first measuring clamping piece, the second pre-clamping piece is arranged on the right side of the second measuring clamping piece, and the point where the tooth tips of the first pre-clamping tooth 21, the third pre-clamping tooth 23, the first measuring tooth 31 and the third measuring tooth 33 are located or the plane where the tooth tips are located are arranged in a coplanar mode.
S2: pre-clamping: the pre-clamping piece clamps the piece to be tested;
s21: placing the piece to be measured between the first pre-clamping tooth 21 and the second pre-clamping tooth 22, the first measuring tooth 31 and the second measuring tooth 32, the third measuring tooth 33 and the fourth measuring tooth 34, and the third pre-clamping tooth 23 and the fourth pre-clamping tooth 24 in sequence;
s22: the second driving piece drives the second pre-clamping teeth 22 and the fourth pre-clamping teeth 24 to move towards the first pre-clamping teeth 21 and the third pre-clamping teeth 23 until the workpiece is clamped.
S23: the third driving piece drives the first pre-clamping piece to move towards the left side so as to straighten the piece to be tested;
s3: measuring and clamping: the measuring clamping piece clamps the piece to be measured;
the first drive element drives the second measuring tooth 32 and the fourth measuring tooth 34 in the direction of the first measuring tooth 31 and the third measuring tooth 33 until the tips of all measuring teeth grip the workpiece.
S4: and (3) testing the resistance: and measuring the resistance of the to-be-measured piece clamped by the clamping piece through the measuring mechanism.
And measuring the resistance of the to-be-measured piece clamped by the first measuring clamping piece and the second measuring clamping piece through a microohm meter.
Example 4
The present embodiment provides a resistance testing method, which uses the resistance testing apparatus provided in embodiment 2 to measure a resistance.
Example 5
The embodiment provides a conductivity testing method, which comprises the following steps:
s1: installation: the at least two pre-clamping pieces are arranged on the outer side of a measuring space formed by the two measuring clamping pieces;
s11: mounting a first measuring clamp and a second measuring clamp on a substrate 1
S12: the first pre-clamping piece is arranged on the left side of the first measuring clamping piece, the second pre-clamping piece is arranged on the right side of the second measuring clamping piece, and the point where the tooth tips of the first pre-clamping tooth 21, the third pre-clamping tooth 23, the first measuring tooth 31 and the third measuring tooth 33 are located or the plane where the tooth tips are located are arranged in a coplanar mode.
S2: measuring length: recording the actual measurement length of the measurement clamping piece along the length direction of the piece to be measured; the distance L between the positioning surface 35 of the first measuring tooth 31 and the positioning surface 35 of the third measuring tooth 33 is measured by a vernier caliper or other measuring ruler.
S3: pre-clamping: the pre-clamping piece clamps the piece to be tested;
s31: placing the piece to be measured between the first pre-clamping tooth 21 and the second pre-clamping tooth 22, the first measuring tooth 31 and the second measuring tooth 32, the third measuring tooth 33 and the fourth measuring tooth 34, and the third pre-clamping tooth 23 and the fourth pre-clamping tooth 24 in sequence;
s32: the second driving piece drives the second pre-clamping teeth 22 and the fourth pre-clamping teeth 24 to move towards the first pre-clamping teeth 21 and the third pre-clamping teeth 23 until the workpiece is clamped.
S33: the third driving piece drives the first pre-clamping piece to move towards the left side so as to straighten the piece to be tested;
s4: measuring and clamping: the measuring clamping piece clamps the piece to be measured;
the first drive element drives the second measuring tooth 32 and the fourth measuring tooth 34 in the direction of the first measuring tooth 31 and the third measuring tooth 33 until the tips of all measuring teeth grip the workpiece.
S5: and (3) testing the resistance: and measuring the resistance of the to-be-measured piece clamped by the clamping piece through the measuring mechanism.
And measuring the resistance of the to-be-measured piece clamped by the first measuring clamping piece and the second measuring clamping piece through a microohm meter, wherein the measured resistance is R.
S6: measuring a cross section: measuring the actual cross-sectional area of the piece to be measured by a measuring mechanism; and taking the piece to be measured out of the jig, and measuring the diameter or the cross-sectional dimension of the piece to be measured by the laser range finder. For example, the cross-sectional area is obtained as S.
S7 meterCalculating the resistivity: calculating the resistivity of the to-be-measured piece through the resistance, the actual measurement length and the actual section area
S8: calculating the conductivity; and calculating the conductivity of the piece to be measured according to the resistivity of the piece to be measured. Conductivity IACS (International Annealed Copper Standard) is the ratio of the resistivity specified by the International Annealed Copper Standard to the resistivity of the same unit sample multiplied by 100. Wherein standard annealed pure copper is generally defined to have a conductivity of 100% IACS,
therefore, the temperature of the molten metal is controlled,
thereby finally obtaining the conductivity of the actual piece to be measured. And comparing the actual requirement with the standard range to finally obtain a finished product result.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (7)
1. A test fixture, comprising: a substrate, and mounted on the substrate:
the pre-clamping mechanism comprises at least two pre-clamping pieces, and any pre-clamping piece forms a pre-clamping space for clamping the piece to be tested;
the clamping mechanism comprises measurement clamping pieces which are arranged in pairs, and any one of the measurement clamping pieces is provided with a clamping space for clamping the piece to be measured; the pair of measuring clamping pieces enclose a measuring space;
the clamping mechanism is provided with at least two pre-clamping pieces which are respectively arranged at two sides of the measuring space and used for clamping the piece to be measured, and the measuring clamping pieces are used for clamping the measuring state of the piece to be measured.
2. The test fixture of claim 1,
any one measuring clamping piece comprises a pair of measuring teeth, and the measuring teeth are oppositely arranged; the clamping space is a space surrounded by tooth tips opposite to the measuring teeth;
in the measuring state, the contact between the tooth point of the measuring tooth and the piece to be measured is point contact, or the contact between the tooth point of the measuring tooth and the piece to be measured is line contact.
3. The test fixture of claim 2,
the measuring teeth comprise positioning surfaces and bending surfaces, and the positioning surfaces and the bending surfaces are intersected at points where tooth tops of the measuring teeth are located or lines where the tooth tops are located;
the positioning surface is perpendicular to the length direction of the piece to be measured; the positioning surfaces of the pair of measuring teeth of any one measuring clamping piece are arranged in a coplanar mode.
4. The test fixture of any one of claims 1-3, further comprising a drive mechanism, the drive mechanism comprising:
the driving end of the first driving piece is connected with the measuring clamping piece and used for driving the measuring clamping piece to clamp the piece to be measured.
5. The test fixture of claim 4,
the pre-clamping piece comprises at least one pair of pre-clamping teeth, the pre-clamping teeth are arranged in a staggered mode, and the pre-clamping space is a space formed by enclosing of tooth tips opposite to the pre-clamping teeth.
6. The test fixture of claim 4, wherein the drive mechanism further comprises:
the driving end of the second driving piece is connected with the pre-clamping piece and used for driving the clamping of the pre-clamping piece;
and the driving end of the third driving piece is connected with the pre-clamping piece, and the third driving piece drives the pre-clamping piece to stretch the piece to be tested along the length direction of the piece to be tested towards the direction far away from the measuring space.
7. A resistance testing device, comprising: the measuring mechanism is used for testing the resistance of the piece to be tested which is arranged in the measuring space along the length extension direction of the piece to be tested, and the testing jig of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807077.7U CN212965163U (en) | 2020-08-25 | 2020-08-25 | Test fixture and resistance testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807077.7U CN212965163U (en) | 2020-08-25 | 2020-08-25 | Test fixture and resistance testing device |
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| CN212965163U true CN212965163U (en) | 2021-04-13 |
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2020
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