CN112577894A - Enameled wire impregnating varnish adhesion testing device and testing method - Google Patents
Enameled wire impregnating varnish adhesion testing device and testing method Download PDFInfo
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Abstract
A kind of varnished wire impregnating varnish adhesion test device and test method, in the impregnating varnish adhesion test technical field, the control base of the test device has display screen which is connected with dynamometer, both ends of the control base are equipped with upright post respectively, the fixed beam is fixed between the top ends of two upright posts, the sliding beam is connected between two upright posts, the middle part of the fixed beam is connected with the positioning clamp I through dynamometer, the upper end of the sliding beam is equipped with positioning clamp II, the positioning clamp I is connected with both ends of the spiral coil in positioning, the middle part of the spiral coil is connected with the positioning clamp II in tensioning, or the positioning clamp II is connected with both ends of the spiral coil in positioning, the middle part of the spiral coil is connected with the positioning clamp I in pressing, the beneficial effects of the invention are that the test device has simple structure, can be installed flexibly according to the need, realizes the stable positioning of the spiral coil, the test process is more stable, and the reliability of the test result is improved.
Description
Technical Field
The invention relates to the technical field of impregnating varnish adhesion testing, in particular to an enameled wire impregnating varnish adhesion testing device and method.
Background
The impregnating varnish is used for impregnating the electric coil and the winding to fill gaps in the electric coil and the winding, so that wires of the coil and the wires and other insulators are bonded into a whole, and the electric strength, the mechanical property, the heat conducting property, the protective property and the like of the electric coil insulation are improved. The strength of the bond between the impregnating varnish film and the electrical coil therefore provides a measure of the quality of use, the greater the strength of the bond the longer the service life of the electrical coil.
At present, the test method of the bonding strength of the lateral definite impregnating varnish on the enameled wire base material comprises a twisted coil test method, a spiral coil test method and a wire harness test method, wherein the spiral coil test method is commonly used, and the test operation method comprises the steps of placing a wound spiral coil on a support of a tensile machine, and then testing the maximum load which can be borne by the spiral coil in a mode that a pressure head is pressed downwards so as to represent the value of the bonding force most by the force required for damaging the spiral coil. However, the existing testing equipment can not stably position the spiral coil, the spiral coil is often positioned by hands in an auxiliary manner, the spiral coil is often skewed and dropped in the process of testing the bonding force, the error of a testing result is large, and the testing efficiency is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device for testing the adhesion of the impregnating varnish on the enameled wire, which can stably position a spiral coil which is covered with the impregnating varnish and cured, and can act on the spiral coil in a stretching or pressing mode to detect the adhesion of the impregnating varnish on the spiral coil.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the enameled wire impregnating varnish binding power testing device comprises a control base, a stand column, a fixed beam, a sliding beam, a dynamometer, a positioning clamp I and a positioning clamp II, the control base is provided with a display screen which is electrically connected with the dynamometer, the two ends of the control base are respectively provided with the upright posts, the fixed beam is fixed between the top ends of the two upright posts, the sliding beam is connected between the two upright posts in a sliding way, the middle part of the fixed beam is connected with the positioning clamp I through the dynamometer, the upper end of the sliding beam is provided with the positioning clamp II, the positioning clamp I is connected with two ends of the spiral coil in a positioning way, the middle part of the spiral coil is connected with the positioning clamp II in a tensioning way, or the positioning fixture II is connected with the two ends of the spiral coil in a positioning mode, and the middle of the spiral coil is connected with the positioning fixture I in a pressing mode.
Furthermore, a driving motor is arranged in the control base, ball screw mechanisms are respectively arranged in the two stand columns, an output shaft of the driving motor is coaxially connected with one of the ball screw mechanisms, an output shaft of the driving motor is connected with the other ball screw mechanism through a gear and rack transmission mechanism, and lead screw nuts of the two ball screw mechanisms are fixedly connected with two ends of the sliding beam.
Further, positioning fixture I includes chuck I, U-shaped support and joint couple, go up the upper end of chuck I with the dynamometer is fixed continuous, go up the lower extreme of chuck I with the middle part of U-shaped support can be dismantled continuously, the U-shaped support with spiral coil's both ends joint links to each other, the one end of joint couple with spiral coil's middle part joint cooperation, the other end of joint couple pass through wire rope with positioning fixture II links to each other.
Furthermore, the two ends of the U-shaped support are respectively provided with an arc-shaped clamping groove with an opening at one side, and the two arc-shaped clamping grooves are in clamping fit with the two ends of the spiral coil.
Furthermore, the positioning clamp II comprises a lower chuck I fixed on the sliding beam, the lower chuck I and the upper chuck I have the same structure and respectively comprise a fixed shell, a clamping block I and an adjusting stud, an installation cavity with an isosceles trapezoid longitudinal section is arranged inside the fixed shell, clamping blocks I are symmetrically arranged on two sides of the installation cavity respectively, an adjusting stud is connected in the middle of the fixed shell in a penetrating manner, an internal thread section is arranged at one end of the adjusting stud extending into the fixed shell, and one end of the adjusting stud extending into the fixed shell is in abutting fit with one end of the two clamping blocks I through a limiting nut, the middle part of the U-shaped bracket is provided with a connecting stud in threaded connection with the internal thread section, and the two clamping blocks I of the upper chuck I are in clamping fit with the connecting stud, and the steel wire rope is inserted between the two clamping blocks I of the lower chuck I and then is wound and fixed with the adjusting stud.
Furthermore, one end, extending out of the fixed shell, of the adjusting stud of the upper chuck I is fixedly connected with the dynamometer, and one end, extending out of the fixed shell, of the adjusting stud of the lower chuck I is fixedly connected with the sliding beam.
Further, positioning fixture I includes chuck II and depression bar, it includes presss from both sides tight head, presss from both sides tight piece II and adjusting screw to go up chuck II, it is provided with the sliding tray to press from both sides tight in the head to press from both sides, set up in the sliding tray press from both sides tight piece II, press from both sides one side of tight piece II and pass through adjusting screw with the both ends of sliding tray link to each other, adjusting screw's one end is stretched out press from both sides tight head one end and rotatory handle and link to each other, press from both sides the opposite side of tight piece II and the one end sliding fit of depression bar, the one end of depression bar is fixed press from both sides to be overhead, press from both sides the bottom of tight head be provided with the notch that the sliding tray communicates with each.
Further, positioning fixture II includes chuck II and positioning seat down, the structure of chuck II is the same with the structure of last chuck II down, the positioning seat includes U-shaped seat, connecting rod and constant head tank, the lower extreme of U-shaped seat with the tight piece of clamp of chuck II links to each other down, the both ends of U-shaped seat are connected with two connecting rods, and the middle part of the upper surface of two connecting rods is provided with the constant head tank relatively, two the constant head tank with the both ends joint cooperation of helical coil, the lower extreme of depression bar is located between two constant head tanks.
The method for testing the adhesion of the enameled wire impregnating varnish by using the testing device comprises the following steps of:
1) winding a spiral coil on a round rod with a specified diameter to ensure that the spiral coil is tight and not loose;
2) vertically soaking the spiral coil in impregnating varnish for 2-4 min, taking out after soaking, and keeping the spiral coil vertically suspended for draining varnish for 2-3 min;
3) placing the spiral coil into a hot air circulation oven at the temperature of 150-170 ℃ to bake for 170-190 min, and cooling to room temperature after curing the impregnating varnish;
4) the method comprises the steps of positioning spiral coils on a testing device, acting on the spiral coils in a stretching or pressing mode at a speed of 40-60 mm/min, recording the maximum tensile force or pressure when each spiral coil breaks, and solving the average value of the maximum tensile force or pressure of the spiral coils, namely the testing value representing the bonding force, wherein if the testing value is greater than 80N, the requirement of the bonding force is met.
Furthermore, in the step 4), the tensile test method includes the steps that the spiral coil is positioned in arc-shaped clamping grooves at two ends of the U-shaped support, a clamping hook is clamped in the middle of the spiral coil, the lower end of the clamping hook is clamped and fixed with the lower chuck I through a steel wire rope, and the sliding beam drives the lower chuck I to move downwards and tension the spiral coil until the spiral coil is broken; the pressure testing method comprises the steps of positioning the spiral coil in the two positioning grooves on the positioning seat, adjusting a rotating handle on the upper chuck II to squeeze the pressure rod tightly, installing and positioning the positioning seat on the lower chuck II to enable the lower end of the pressure rod to be opposite to the middle part between the two positioning grooves on the positioning seat, and driving the lower chuck II to move upwards by the sliding beam to enable the pressure rod to tightly press the upper end of the spiral coil until the spiral coil is broken.
The invention has the beneficial effects that:
1. according to the invention, through the designed positioning clamp I and the positioning clamp II, the spiral coil is positioned on the positioning clamp I and then is connected with the positioning clamp II in a tensioning manner, or the spiral coil is positioned on the positioning clamp II and then is connected with the positioning clamp I in a pressing manner, so that the spiral coil can be stably positioned, the loosening or deflection of the spiral coil is prevented, the positioning clamp II is driven to move up and down through the movement of the sliding beam, the tension or pressure test on the spiral coil to be tested is realized, the test flexibility is improved, the load borne by the spiral coil is detected in real time through the dynamometer, the adhesion force when the spiral coil is broken is conveniently recorded, the test is more convenient, and the reliability of the detection result is improved.
2. The invention designs a positioning fixture I and a positioning fixture II which are of two matching structures, wherein the positioning fixture I and the positioning fixture II both comprise chucks which can be clamped and positioned by screwing limiting nuts, a U-shaped support is arranged on the chucks of the positioning fixture I in a threaded connection mode, arc-shaped clamping grooves are designed at two ends of the U-shaped support and are clamped with two ends of a spiral coil through the two arc-shaped clamping grooves, a clamping hook is hung in the middle of the spiral coil, the lower end of the clamping hook is connected with a steel wire rope and is tightly extruded and fixed with the chucks on the positioning fixture II through the steel wire rope, so that the spiral coil is convenient to position and stable to position, and the tensile test of the spiral coil is realized; the other structure of positioning fixture I and positioning fixture II is that, positioning fixture I and positioning fixture II also include the chuck, this chuck is through the rotatory handle of rotation operation, make one of them clamp splice remove and accomplish the tight action of clamp, install the positioning seat on positioning fixture II's chuck, set up the constant head tank of location spiral coil on the positioning seat, install the depression bar on positioning fixture I's chuck, can fix the depression bar location through revolving wrong rotatory handle, press the spiral coil between two constant head tanks of contact through the depression bar, realized the pressure test to spiral coil. The simple structure of positioning fixture I and positioning fixture II of above two kinds of cooperation structures can all realize the stable positioning to helical coil as required on the tensile tester, makes to draw and presses the test more stable, has improved the reliability of test result.
In conclusion, the testing device provided by the invention has a simple structure, can be flexibly installed according to needs, realizes stable positioning of the spiral coil, enables the testing process to be more stable, and improves the reliability of the testing result.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of another testing apparatus according to the present invention;
FIG. 3 is a top view of the positioning socket of FIG. 2;
the labels in the above figures are: 1. the adjustable clamp comprises a control base, 2. a stand column, 3. a fixed beam, 4. a sliding beam, 5. a dynamometer, 6. a positioning clamp I, 61. an upper clamp head I, 611. a fixed shell, 612. a clamping block I, 613. an adjusting stud, 614. an installation cavity, 615. a limiting nut, 62. a U-shaped bracket, 621. an arc clamping groove, 63. a clamping hook, 64. an upper clamp head II, 641. a clamping head, 642. a clamping block II, 643. an adjusting screw, 644. a sliding groove, 645. a notch, 65. a pressure rod, 7. a positioning clamp II, 71. a lower clamp head I, 72. a lower clamp head II, 73. a positioning seat, 731. a U-shaped seat, 732. a connecting rod, 733. a positioning groove and 8. a spiral coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation scheme of the invention is as follows: as shown in figures 1 and 2, the enameled wire impregnating varnish adhesion force testing device comprises a control base 1, stand columns 2, a fixed beam 3, a sliding beam 4, a dynamometer 5, a positioning clamp I6 and a positioning clamp II 7, wherein a display screen 11 electrically connected with the dynamometer 5 is arranged on the control base 1 and used for displaying the force detected by the dynamometer 5 on the display screen 11, the stand columns 2 are respectively arranged at two ends of the control base 1, the fixed beam 3 is fixed between the top ends of the two stand columns 2, the sliding beam 4 is slidably connected between the two stand columns 2, the middle part of the fixed beam 3 is connected with the positioning clamp I6 through the dynamometer 5, the positioning clamp II 7 is arranged at the upper end of the sliding beam 4, the positioning clamp I6 is connected with two ends of a spiral coil 8 in a positioning way, the middle part of the spiral coil 8 is connected with the positioning clamp II 7 in a tensioning way, or the positioning clamp II 7 is connected with two ends of the spiral, spiral coil 8's middle part compresses tightly with positioning fixture I6 and links to each other, positioning fixture I6 and positioning fixture II 7 can be with spiral coil 8 stable positioning, the pine of having prevented spiral coil takes off or crooked, it reciprocates to drive positioning fixture II 7 through the removal of sliding beam 4, thereby realize tensile force or the pressure test to the spiral coil that awaits measuring, the flexibility of test has been improved, the load that bears through dynamometer 5 real-time detection spiral coil, the adhesion force when conveniently recording spiral coil fracture, it is more convenient to make the test, the reliability of testing result has been improved.
Specifically, a driving motor is arranged in a control base 1, ball screw mechanisms are respectively arranged in two upright posts 2, an output shaft of the driving motor is coaxially connected with one of the ball screw mechanisms, an output shaft of the driving motor is connected with the other ball screw mechanism through a gear-rack transmission mechanism, screw nuts of the two ball screw mechanisms are fixedly connected with two ends of a sliding beam 4, the ball screw mechanisms connected with the output shaft of the driving motor are rotated through the work of the driving motor, the other ball screw mechanism is simultaneously rotated under the transmission action of the gear-rack transmission mechanism, so that the two ball screw mechanisms are synchronously rotated, the screw nuts on the two ball screw mechanisms move up and down along the length direction of the ball screw mechanisms, the up and down movement of the sliding beam 4 is realized, and a positioning clamp II 7 on the sliding beam 4 moves up and down, thereby realizing the tension or pressure test of the spiral coil.
Specifically, the cooperation structure of positioning fixture I and positioning fixture II wherein is provided with following two kinds, and one of them structure is: as shown in fig. 1, positioning fixture I6 wherein includes chuck I61, U-shaped support 62 and joint couple 63, the upper end of going up chuck I61 links to each other with dynamometer 5 is fixed, the lower extreme of going up chuck I61 can be dismantled with U-shaped support 62's middle part and link to each other, U-shaped support 62's both ends are provided with one side open-ended arc joint groove 621 respectively, two arc joint grooves 621 cooperate with spiral coil 8's both ends joint, make spiral coil 8's location more convenient stable, the one end of joint couple 63 cooperates with spiral coil 8's middle part joint, the other end of joint couple 63 passes through wire rope and links to each other with positioning fixture II 7.
The upper clamping head I61 comprises a fixed shell 611, clamping blocks I612 and adjusting studs 613, an installation cavity 614 with an isosceles trapezoid longitudinal section is arranged inside the fixed shell 611, the clamping blocks I612 are symmetrically arranged on two sides of the installation cavity 614 respectively, the adjusting studs 613 are connected to the middle of the fixed shell 611 in a penetrating mode, one end, extending into the fixed shell 611, of each adjusting stud 613 is in interference fit with one end of each clamping block I612 through a limiting nut 615, the two clamping blocks I612 can move downwards by screwing the limiting nuts 615, so that the two clamping blocks I612 can be clamped, the two clamping blocks I612 can move upwards by screwing the limiting nuts 615 reversely, the two clamping blocks I612 can be loosened, and clamping loosening and adjusting of the two clamping blocks I612 are more convenient. Adjusting stud 613 stretches into the one end of fixed casing 611 and is provided with internal thread section, the middle part of U-shaped support 62 is provided with the connecting stud with internal thread section threaded connection, realized that the connection of U-shaped support 62 is fixed, and two press from both sides tight piece I612 and one side of connecting stud contact be provided with connecting stud matched with arc wall, go up two tight piece I612 and the connecting stud clamp tight fit of clamp of chuck I61, prevent that connecting stud from taking place to rock, make the installation of U-shaped support 62 more stable.
Specifically, the positioning fixture ii 7 comprises a lower clamp i 71 fixed on the sliding beam 4, the lower clamp i 71 and the upper clamp i 61 have the same structure, and comprise a fixing housing 611, clamping blocks i 612 and an adjusting stud 613, after the steel wire rope is inserted between the two clamping blocks i 612 of the lower clamp i 71 and is wound and fixed with the adjusting stud 613, the two clamping blocks i 612 can be moved upwards by adjusting the limit nut 615, so that the steel wire rope is clamped.
Specifically, one end of the adjusting stud 613 of the upper chuck I61, which extends out of the fixed shell 611, is fixedly connected with the dynamometer 5, and one end of the adjusting stud 613 of the lower chuck I71, which extends out of the fixed shell 611, is fixedly connected with the sliding beam 4, so that the lengths of the upper chuck I61 and the lower chuck I71 can be adjusted as required, and the test universality is improved.
The positioning fixture I and the positioning fixture II are matched to realize tension testing, the specific method is that the spiral coil 8 is positioned in arc-shaped clamping grooves 621 at two ends of the U-shaped support 62, the clamping hook 63 is clamped in the middle of the spiral coil 8, the lower end of the clamping hook 63 is clamped and fixed with the lower chuck I71 through a steel wire rope, the sliding beam 4 drives the lower chuck I71 to move downwards at a constant speed and tension the spiral coil 8 by action of the driving motor until the spiral coil 8 is broken, and at the moment, the tension when the spiral coil 8 is broken is displayed on the display screen 11 of the control base 1.
As shown in fig. 2 and 3, another matching structure of the positioning clamp i and the positioning clamp ii is as follows: the positioning clamp I6 comprises an upper clamp II 64 and a pressure rod 65, the upper clamp II 64 comprises a clamping head 641, a clamping block II 642 and an adjusting screw 643, a sliding groove 644 is arranged in the clamping head 641, the clamping block II 642 is arranged in the sliding groove 644, one side of the clamping block II 642 is connected with the two ends of the sliding groove 644 through the adjusting screw 643, one end of the adjusting screw 643 extends out of one end of the clamping head 641 and is connected with a rotating handle, the other side of the clamping block II 642 is in sliding fit with one end of the pressure rod 65, one end of the pressure rod 65 is fixed on the clamping head 641, a notch 645 communicated with the sliding groove 644 is arranged at the bottom end of the clamping head 641, and the other end of the pressure rod 65 passes through the notch 645 and is opposite to the, the pressure lever 65 comprises a T-shaped lever and a connecting rod, a clamping hook is arranged at the upper end of the T-shaped lever, the connecting rod penetrates through the clamping block II 642 and then is positioned in the clamping head 641, and the clamping hook is clamped on the connecting rod. The clamping block II 642 slides along the length direction of the adjusting screw 643 by screwing and rotating the handle, so that the clamping block II 642 squeezes or loosens one end of the pressing rod 65.
The positioning fixture II 7 comprises a lower chuck II 72 and a positioning seat 73, the structure of the lower chuck II 72 is the same as that of the upper chuck II 64, the positioning seat 73 comprises a U-shaped seat 731, a connecting rod 732 and a positioning groove 733, a positioning block can be arranged at the lower end of the U-shaped seat 731, a through hole is arranged on the positioning block, the through hole is connected to an adjusting screw 643 of the lower chuck II 72 in a penetrating manner, and a clamping block II 642 can clamp the positioning block by adjusting the adjusting screw 643, so that the U-shaped seat 731 is positioned and fixed. Two ends of the U-shaped seat 731 are connected with two connecting rods 732, the two connecting rods 732 are separated from the bottom of the U-shaped seat 731 by a distance enough to break the spiral coil, positioning grooves 733 are oppositely arranged in the middle of the upper surfaces of the two connecting rods 732, the positioning grooves 733 can be formed by directly slotting the upper surfaces of the connecting rods 732 or welding two short rods on the upper surfaces of the connecting rods 732, the two positioning grooves 733 are in clamping fit with the two ends of the spiral coil 8, so that the spiral coil 8 is prevented from being inclined, the lower end of the pressure rod 65 is positioned between the two 733 positioning grooves, and the pressure rod 65 can be guaranteed to be pressed on the spiral coil 8.
The pressure test is realized by matching the positioning fixture I with the positioning fixture II, and the specific method comprises the steps of positioning the spiral coil 8 in two positioning grooves 733 on the positioning seat 73, adjusting a rotating handle on the upper chuck II 64 to squeeze the pressing rod 65 tightly, adjusting a rotating handle on the lower chuck II 72 to position and clamp the positioning seat 73 on the lower chuck II 72, enabling the lower end of the pressing rod 65 to be opposite to the middle part between the two positioning grooves 733 on the positioning seat 73, enabling the sliding beam 4 to drive the lower chuck II 72 to move upwards at a constant speed by the action of the driving motor, enabling the pressing rod 65 to press the upper end of the spiral coil 8 until the spiral coil 8 is crushed, and displaying the pressure when the spiral coil 8 is crushed on the display screen 11 of the control base 1 at the moment.
The method for testing the adhesive force of the enameled wire impregnating varnish by using the testing device comprises the following steps:
1) winding a spiral coil 8 with a certain length on a round rod with a specified diameter to ensure that the spiral coil 8 is tight and not loose;
2) vertically soaking the spiral coil 8 in impregnating varnish for 2-4 min, taking out after soaking, keeping the spiral coil 8 vertically suspended, and draining the impregnating varnish for 2-3 min to completely drip the impregnating varnish of the spiral coil 8;
3) placing the spiral coil 8 into a hot air circulation oven at the temperature of 150-170 ℃ for baking for 170-190 min, and cooling to room temperature after curing the impregnating varnish;
4) the spiral coils 8 are positioned on the testing device and act on the spiral coils 8 in a stretching or pressing mode at the speed of 40-60 mm/min, the maximum tensile force or pressure when each spiral coil 8 is broken is recorded, the average value of the maximum tensile force or pressure of the spiral coils 8 is obtained, namely the testing value representing the bonding force, if the testing value is greater than 80N, the requirement of the bonding force is met, and if the testing value is less than or equal to 80N, the impregnating varnish needs to be replaced again or the coating layer of the varnish film on the enameled wire needs to be changed.
In conclusion, the testing device provided by the invention has a simple structure, can be flexibly installed according to needs, realizes stable positioning of the spiral coil, enables the testing process to be more stable, and improves the reliability of the testing result.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. The enameled wire impregnating varnish adhesion testing device is characterized by comprising a control base (1), stand columns (2), a fixed beam (3), sliding beams (4), a dynamometer (5), a positioning fixture I (6) and a positioning fixture II (7), wherein a display screen (11) electrically connected with the dynamometer (5) is arranged on the control base (1), the stand columns (2) are respectively arranged at two ends of the control base (1), the fixed beam (3) is fixed between the top ends of the two stand columns (2), the sliding beams (4) are connected between the two stand columns (2) in a sliding manner, the middle of the fixed beam (3) is connected with the positioning fixture I (6) through the dynamometer (5), the positioning fixture II (7) is arranged at the upper end of the sliding beam (4), and the positioning fixture I (6) is connected with two ends of a spiral coil (8) in a positioning manner, the middle part of spiral coil (8) with positioning fixture II (7) are taut and link to each other, perhaps positioning fixture II (7) link to each other with the both ends location of spiral coil (8), the middle part of spiral coil (8) with positioning fixture I (6) compress tightly and link to each other.
2. The wire enamel adhesion test apparatus according to claim 1, wherein: the driving motor is arranged in the control base (1), the ball screw mechanisms are arranged in the two stand columns (2) respectively, the output shaft of the driving motor is coaxially connected with one of the ball screw mechanisms, the output shaft of the driving motor is connected with the other ball screw mechanism through the gear-rack transmission mechanism, and the screw nuts of the two ball screw mechanisms are fixedly connected with the two ends of the sliding beam (4).
3. The wire enamel adhesion test apparatus according to claim 1, wherein: positioning fixture I (6) include chuck I (61), U-shaped support (62) and joint couple (63), the upper end of going up chuck I (61) with dynamometer (5) are fixed continuous, the lower extreme of going up chuck I (61) with the middle part of U-shaped support (62) can be dismantled continuously, U-shaped support (62) with the both ends joint of spiral coil (8) links to each other, the joint couple (63) one end with the middle part joint cooperation of spiral coil (8), the joint couple (63) the other end pass through wire rope with positioning fixture II (7) link to each other.
4. The wire enamel adhesion test device according to claim 3, wherein: the both ends of U-shaped support (62) are provided with one side open-ended arc joint groove (621) respectively, two arc joint groove (621) with the both ends joint cooperation of spiral coil (8).
5. The wire enamel adhesion test device according to claim 3, wherein: the positioning clamp II (7) comprises a lower chuck I (71) fixed on the sliding beam (4), the lower chuck I (71) and an upper chuck I (61) are identical in structure and respectively comprise a fixed shell (611), a clamping block I (612) and an adjusting stud (613), an installation cavity (614) with an isosceles trapezoid longitudinal section is arranged inside the fixed shell (611), the clamping blocks I (612) are symmetrically arranged on two sides of the installation cavity (614) respectively, the adjusting stud (613) is connected to the middle of the fixed shell (611) in a penetrating mode, an internal thread section is arranged at one end, extending into the fixed shell (611), of the adjusting stud (613), one end, extending into the fixed shell (611), of the adjusting stud is in abutting fit with one end of the two clamping blocks I (612) through a limiting nut (615), and a connecting stud in threaded connection with the internal thread section is arranged in the middle of the U-shaped support (62), and two clamping blocks I (612) of the upper clamping head I (61) are in clamping fit with the connecting stud, and the steel wire rope is inserted between the two clamping blocks I (612) of the lower clamping head I (71) and then is wound and fixed with the adjusting stud (613).
6. The wire enamel adhesion test device according to claim 5, wherein: one end, extending out of the fixed shell (611), of an adjusting stud (613) of the upper chuck I (61) is fixedly connected with the dynamometer (5), and one end, extending out of the fixed shell (611), of the adjusting stud (613) of the lower chuck I (71) is fixedly connected with the sliding beam (4).
7. The wire enamel adhesion test apparatus according to claim 1 or 2, wherein: the positioning clamp I (6) comprises an upper chuck II (64) and a pressure lever (65), the upper clamping head II (64) comprises a clamping head (641), a clamping block II (642) and an adjusting screw rod (643), a sliding groove (644) is arranged in the clamping head (641), the clamping block II (642) is arranged in the sliding groove (644), one side of the clamping block II (642) is connected with the two ends of the sliding groove (644) through the adjusting screw rod (643), one end of the adjusting screw rod (643) extends out of one end of the clamping head (641) and is connected with a rotating handle, the other side of the clamping block II (642) is in sliding fit with one end of the pressure lever (65), one end of the pressure lever (65) is fixed on the clamping head (641), the bottom end of the clamping head (641) is provided with a notch (645) communicated with the sliding groove (644), the other end of the compression bar (65) penetrates through the notch (645) to be opposite to the positioning clamp II (7).
8. The wire enamel adhesion test apparatus according to claim 7, wherein: positioning fixture II (7) are including lower chuck II (72) and positioning seat (73), the structure of lower chuck II (72) is the same with the structure of last chuck II (64), positioning seat (73) are including U-shaped seat (731), connecting rod (732) and constant head tank (733), the lower extreme of U-shaped seat (731) with the tight piece II (642) of clamp II (72) link to each other down, the both ends of U-shaped seat (731) are connected with two connecting rods (732), and the middle part of the upper surface of two connecting rods (732) is provided with constant head tank (733) relatively, two constant head tank (733) with the both ends joint cooperation of spiral coil (8), the lower extreme of depression bar (65) is located between two constant head tank (733).
9. A method for testing the adhesion of an enameled wire impregnating varnish using the testing device according to any one of claims 1 to 8, wherein: the method comprises the following steps:
1) winding a spiral coil (8) on a round bar with a specified diameter to ensure that the spiral coil (8) is tight and not loose;
2) vertically soaking the spiral coil (8) in impregnating varnish for 2-4 min, taking out after the impregnation is finished, and keeping the spiral coil (8) vertically suspended for draining the varnish for 2-3 min;
3) placing the spiral coil (8) into a hot air circulation oven at the temperature of 150-170 ℃ for baking for 170-190 min, and cooling to room temperature after curing the impregnating varnish;
4) the method comprises the steps of positioning the spiral coils (8) on the testing device, acting on the spiral coils (8) in a stretching or pressing mode at a speed of 40-60 mm/min, recording the maximum tensile force or pressure when each spiral coil (8) breaks, and calculating the average value of the maximum tensile force or pressure of the spiral coils (8), namely the testing value representing the bonding force, wherein the bonding force requirement is met if the testing value is greater than 80N.
10. The wire enamel adhesion test method according to claim 9, wherein: in the step 4), the tensile test method comprises the steps that the spiral coil (8) is positioned in arc-shaped clamping grooves (621) at two ends of the U-shaped support (62), the clamping hook (63) is clamped in the middle of the spiral coil (8), the lower end of the clamping hook (63) is fixedly clamped with the lower chuck I (71) through a steel wire rope, and the sliding beam (4) drives the lower chuck I (71) to move downwards and tension the spiral coil (8) until the spiral coil (8) is broken; the pressure testing method comprises the steps that the spiral coil (8) is positioned in the two positioning grooves (733) in the positioning seat (73), the rotating handle on the upper chuck II (64) is adjusted to squeeze the pressing rod (65), the positioning seat (73) is installed and positioned on the lower chuck II (72), the lower end of the pressing rod (65) is opposite to the middle part between the two positioning grooves (733) in the positioning seat (73), the sliding beam (4) drives the lower chuck II (72) to move upwards, and the pressing rod (65) presses the upper end of the spiral coil (8) until the spiral coil (8) is broken.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117907005A (en) * | 2024-03-19 | 2024-04-19 | 山东大业股份有限公司 | Steel cord sampler and steel cord detection equipment |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2372093A (en) * | 1942-12-03 | 1945-03-20 | Westinghouse Electric & Mfg Co | Apparatus for testing enameled wire |
| JP2011182481A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Ltd | Device for inspection of insulating layer property of enameled wire, and apparatus of manufacturing coil for rotary electric machine with the same |
| CN203881669U (en) * | 2014-04-18 | 2014-10-15 | 江苏凯伦建材股份有限公司 | Test device for tensile bond strength of waterproof coiled material |
| CN104677749A (en) * | 2015-03-18 | 2015-06-03 | 北京科技大学 | Metal diaphragm bending fatigue measurement device and method for diaphragm compressor |
| CN104977207A (en) * | 2015-07-23 | 2015-10-14 | 安徽农业大学 | Material mechanical testing machine capable of performing stretching, compressing, shearing and bending tests |
| CN105651687A (en) * | 2014-11-14 | 2016-06-08 | 中国航空工业第六八研究所 | A tool for testing bobbin coil binding power and a method therefor |
| CN107505262A (en) * | 2017-09-30 | 2017-12-22 | 中国工程物理研究院电子工程研究所 | One kind is used for exoskeletal self-binding enamel wire cohesive force test fixture and method |
| CN108387514A (en) * | 2018-05-30 | 2018-08-10 | 金杯电工电磁线有限公司 | The test device and test method of bonding lacquered wires intensity under a kind of condition of high temperature |
| CN109632635A (en) * | 2019-02-28 | 2019-04-16 | 常州工学院 | A kind of bone-free coil bonding force automatic testing equipment |
| CN209471032U (en) * | 2019-01-21 | 2019-10-08 | 东莞荣星电子有限公司 | One kind being used for exoskeletal self-binding enamel wire cohesive force test fixture |
| KR102108014B1 (en) * | 2018-11-22 | 2020-05-07 | 재단법인 한국탄소융합기술원 | Jig for analyzing prepreg adhesive forces |
-
2020
- 2020-12-08 CN CN202011445742.7A patent/CN112577894B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2372093A (en) * | 1942-12-03 | 1945-03-20 | Westinghouse Electric & Mfg Co | Apparatus for testing enameled wire |
| JP2011182481A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Ltd | Device for inspection of insulating layer property of enameled wire, and apparatus of manufacturing coil for rotary electric machine with the same |
| CN203881669U (en) * | 2014-04-18 | 2014-10-15 | 江苏凯伦建材股份有限公司 | Test device for tensile bond strength of waterproof coiled material |
| CN105651687A (en) * | 2014-11-14 | 2016-06-08 | 中国航空工业第六八研究所 | A tool for testing bobbin coil binding power and a method therefor |
| CN104677749A (en) * | 2015-03-18 | 2015-06-03 | 北京科技大学 | Metal diaphragm bending fatigue measurement device and method for diaphragm compressor |
| CN104977207A (en) * | 2015-07-23 | 2015-10-14 | 安徽农业大学 | Material mechanical testing machine capable of performing stretching, compressing, shearing and bending tests |
| CN107505262A (en) * | 2017-09-30 | 2017-12-22 | 中国工程物理研究院电子工程研究所 | One kind is used for exoskeletal self-binding enamel wire cohesive force test fixture and method |
| CN108387514A (en) * | 2018-05-30 | 2018-08-10 | 金杯电工电磁线有限公司 | The test device and test method of bonding lacquered wires intensity under a kind of condition of high temperature |
| KR102108014B1 (en) * | 2018-11-22 | 2020-05-07 | 재단법인 한국탄소융합기술원 | Jig for analyzing prepreg adhesive forces |
| CN209471032U (en) * | 2019-01-21 | 2019-10-08 | 东莞荣星电子有限公司 | One kind being used for exoskeletal self-binding enamel wire cohesive force test fixture |
| CN109632635A (en) * | 2019-02-28 | 2019-04-16 | 常州工学院 | A kind of bone-free coil bonding force automatic testing equipment |
Non-Patent Citations (2)
| Title |
|---|
| IEC PUBLICATION: "用螺旋线圈粘结力试验评定电气绝缘漆的热寿命(IEC.Publication 290 1969)", 《绝缘材料》 * |
| 中国标准出版社: "《中国国家标准分类汇编 电工卷8》", 30 November 1993, 中国标准出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117907005A (en) * | 2024-03-19 | 2024-04-19 | 山东大业股份有限公司 | Steel cord sampler and steel cord detection equipment |
| CN117907005B (en) * | 2024-03-19 | 2024-06-04 | 山东大业股份有限公司 | Steel cord sampler and steel cord detection equipment |
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| CN112577894B (en) | 2023-05-12 |
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