A high-frequency switching power supply transformer testing device

Abstract

The present application relates to the technical field of transformer testing, in particular to a high-frequency switching power transformer testing equipment; comprising a tester and a tooling table on the left side of the tester; a tooling plate is placed on the tooling table; a longitudinal groove for placing a longitudinal strip is arranged on the upper surface of the tooling plate; a transverse groove for placing a transverse strip is arranged on the upper surface of the tooling plate; the cross section of the transverse strip is an inverted isosceles trapezoid; the inverted isosceles trapezoidal groove on the lower surface of the slide is slidably connected to the left and right ends of the transverse strip; the inverted isosceles trapezoidal groove is provided with a first threaded hole towards the back; a first bolt is threadedly connected in the first threaded hole; two symmetrical electrode plates are connected upwards to a single slide; the adjustable slide cooperates with the inverted isosceles trapezoidal transverse strip, so that the position of the electrode plate can be flexibly adjusted, and the testing of transformers of multiple specifications can be adapted, thereby solving the problems of frequent tool change and poor adaptability of traditional tooling.

Description

Technical Field

[0001] This invention relates to the field of transformer testing technology, specifically a high-frequency switching power supply transformer testing device. Background Technology

[0002] As a core component for power conversion and electrical isolation, the high-frequency switching power supply transformer's winding continuity, inductance, and insulation withstand voltage directly determine the stability and safety of the downstream power system. Therefore, a full inspection of the electrical performance of each transformer is required during production. Existing testing devices mostly use customized fixtures for single-specification products. They determine whether the parameters are qualified by inputting a specific test current into the primary coil of the transformer and collecting feedback signals from the secondary coil. Currently, the fixtures of such testing devices are mostly rigid positioning structures, which can only complete pin conduction and signal acquisition for transformers of preset specifications. They cannot quickly adapt to products of different sizes and pin layouts. When facing multi-variety, small-batch production scenarios, frequent fixture changes are required, which is not only time-consuming and labor-intensive but also prone to affecting test accuracy due to positioning errors. They cannot flexibly meet the testing needs of high-frequency transformers of different specifications.

[0003] The structure of a transformer includes pin terminals and lead terminals. Before each test, the pin terminals and lead terminals need to be inserted into the energized slots on the fixture according to the requirements. During the process of inserting the transformer lead into the energized slot, if the energized slot is too small, it will cause poor insertion. If the energized slot is too large, it will cause poor contact of the lead terminals during subsequent tests. This is also a problem that needs to be solved. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a high-frequency switching power supply transformer testing device. This invention uses an adjustable slide block in conjunction with an inverted isosceles trapezoidal crossbar to flexibly adjust the position of the electrode plate, adapting to the testing of transformers of various specifications. This solves the problems of frequent fixture changes and poor adaptability of traditional tooling.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: A high-frequency switching power supply transformer testing device of the present invention includes a tester and a tooling table on the left side of the tester; a tooling plate is placed on the tooling table; a longitudinal groove for placing longitudinal bars is provided on the upper surface of the tooling plate; a transverse groove for placing transverse bars is provided on the upper surface of the tooling plate; the cross section of the transverse bar is an inverted isosceles trapezoid; the left and right ends of the transverse bar are slidably connected to the inverted isosceles trapezoidal groove on the lower surface of the slide block; a first threaded hole is provided in the rearward direction of the inverted isosceles trapezoidal groove; a first bolt is threadedly connected to the first threaded hole; two symmetrical electrode plates are connected to the slide block facing upward; an insertion gap is formed between the corresponding two electrode plates; the two electrode plates on the left are electrically connected to one end of the tester, and the two electrode plates on the right are electrically connected to the other end of the tester.

[0006] Preferably, the front and rear inner walls of the transverse groove are provided with movable grooves; the length direction of the movable groove is consistent with the left and right direction; the front and rear ends of the electrode plate are movably connected to the corresponding movable grooves by square rods; the vertical thickness of the square rods is adapted to the vertical width of the movable grooves; a notch is provided at the lower edge of the electrode plate; a notch is fixedly connected to the front and rear inner walls of the notch; two guide grooves for the notch to move are provided through the front and rear of the slide block; the upper ends of the two guide grooves are close to each other, and the lower ends are far apart; the transverse bar moves up and down in the transverse groove; the longitudinal bar slides up and down in the longitudinal groove; a spring hole is provided on the lower surface of the longitudinal bar; the upper inner wall of the spring hole is connected to the bottom of the longitudinal groove by a return spring.

[0007] Preferably, the guide groove on the left side is corrugated; the two notches on the slide on the left side move closer or further apart as they oscillate back and forth under the guidance of their respective guide grooves; and a voltage-conducting tightness part is provided on the inner side of the electrode plate on the left side.

[0008] Preferably, the front-to-back width of the slide block on the right side is smaller than the front-to-back width of the notch; there is a gap between the front and rear ends of the electrode plate on the right side and the front and rear inner walls of the transverse groove; a hemispherical block is fixedly connected to the bottom of the right half of the movable groove; the hemispherical blocks on the front and rear sides are offset in the left and right directions; the square rod on the right side fluctuates back and forth under the pressure of the hemispherical blocks on the front and rear sides; a conductive and elastic grinding disc is provided on the inner side of the electrode plate on the right side.

[0009] Preferably, the two electrode plates on the right side oscillate in opposite directions as they move closer to or further apart from each other.

[0010] Preferably, the two electrode plates on the right side are provided with right-angled trapezoidal grooves on their adjacent sides; the inclined inner wall of the right-angled trapezoidal groove is provided with an auxiliary strip; the auxiliary strip is slidably connected to a concave auxiliary block; the upper end of the auxiliary block is connected to the upper inner wall of the right-angled trapezoidal groove by a tension spring; the auxiliary block is fixedly connected to the grinding disc; the two grinding discs are provided with grinding patterns on their adjacent sides.

[0011] Preferably, the upper surface and left and right sides of the longitudinal strip are provided with inverted T-shaped grooves; an inverted T-shaped block is provided in the inverted T-shaped groove; the upper end of the inverted T-shaped block is rotatably connected to an L-shaped corner block by a torsion spring.

[0012] Preferably, the distance between the left and right ends of the inverted T-shaped block is less than the width of the longitudinal strip; the left and right ends of the inverted T-shaped block are provided with second threaded holes; the second threaded holes are internally threaded with second bolts.

[0013] Preferably, the guide groove on the right is corrugated in the same shape as the guide groove on the left; the two notches on the right move away from or closer to each other under the undulation.

[0014] Preferably, conductive metal is embedded in the bottom of the horizontal groove and on the left and right sides of the vertical bar. The left and right conductive metals are connected to the corresponding electrodes of the tester. The horizontal bar, slide, missing rod, electrode plate, auxiliary bar and auxiliary block are all conductive materials, which can realize circuit connection after the slide moves into place.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses an adjustable slide block in conjunction with an inverted isosceles trapezoidal crossbar to flexibly adjust the position of the electrode plate, adapting to the testing of transformers of various specifications, thus solving the problems of frequent fixture changes and poor adaptability of traditional tooling.

[0016] 2. This invention achieves adaptive clamping and reset of the insertion gap by cooperating with a reset spring, an inclined guide groove, and a missing rod. This solves the technical problems of poor insertion and poor contact caused by excessively small insertion gaps in traditional methods, making transformer testing more accurate.

[0017] 3. This invention uses a corrugated guide groove to cooperate with the conductive voltage part, and uses the linkage motion during the test process to adaptively correct the deformation of the L-shaped pin, and straighten the pin posture, thus solving the problem of difficult subsequent circuit board insertion and poor assembly accuracy caused by the skewed transformer pin. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the tooling plate in this invention; Figure 3 This is a perspective view of the vertical and horizontal bars in this invention; Figure 4 This is a perspective view of the electrode plate in this invention; Figure 5 This is a perspective view of the inverted T-shaped block in this invention; Figure 6 This is a perspective view of the auxiliary block and auxiliary strip in this invention; Figure 7 yes Figure 2 A sectional view in the front and back directions; Figure 8 yes Figure 7 Enlarged view of point A in the middle; Figure 9 This is a cross-sectional view of the movable groove in this invention; Figure 10 yes Figure 9 Enlarged view of point B in the middle.

[0020] In the diagram: 1. Tester; 2. Tooling table; 3. Tooling plate; 31. Horizontal groove; 32. Movable groove; 33. Longitudinal groove; 34. Hemispherical block; 35. Conductive metal; 4. Horizontal bar; 5. Slide seat; 51. Inverted isosceles trapezoidal groove; 52. First threaded hole; 53. First bolt; 54. Guide groove; 6. Electrode plate; 61. Insertion gap; 62. Square rod; 63. Notched groove; 64. Notched rod; 65. Conductive voltage tightening part; 66. Grinding disc; 67. Right-angled trapezoidal groove; 68. Auxiliary bar; 69. Auxiliary block; 691. Tension spring; 7. Longitudinal bar; 71. Spring hole; 72. Return spring; 73. Inverted T-shaped groove; 74. Inverted T-shaped block; 75. Torsion spring; 76. L-shaped corner block; 77. Second threaded hole; 78. Second bolt. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 10 As shown, the present invention includes the following embodiments: Example 1: A high-frequency switching power supply transformer testing device includes a tester 1 and a fixture table 2 on the left side of the tester 1; a fixture plate 3 is placed on the fixture table 2; a longitudinal groove 33 for placing longitudinal bars 7 is provided on the upper surface of the fixture plate 3; a transverse groove 31 for placing transverse bars 4 is provided on the upper surface of the fixture plate 3; the cross section of the transverse bar 4 is an inverted isosceles trapezoid; the left and right ends of the transverse bar 4 are slidably connected to the inverted isosceles trapezoidal groove 51 on the lower surface of the slide block 5; a first threaded hole 52 is provided in the rearward direction of the inverted isosceles trapezoidal groove 51; a first bolt 53 is internally threaded into the first threaded hole 52; two symmetrical electrode plates 6 are connected to the upper side of a single slide block 5; an insertion gap 61 is formed between the corresponding two electrode plates 6; the two electrode plates 6 on the left side are electrically connected to one end of the tester 1, and the two electrode plates 6 on the right side are electrically connected to the other end of the tester 1.

[0023] When using this high-frequency switching power supply transformer testing equipment to test transformers without shielding, the operator first loosens the first bolt 53 inside the first threaded hole 52 on the slide 5 according to the overall dimensions of the transformer to be tested and the spacing specifications of the pin terminals and lead terminals. This releases the locking limit of the first bolt 53 on the slide 5, allowing the slide 5 to slide smoothly left and right through the inverted isosceles trapezoidal groove 51 at the bottom, which fits against the horizontal bar 4 of the inverted isosceles trapezoidal structure. The limiting structure of the inverted isosceles trapezoid ensures that the slide 5 will not deviate during the sliding process. If any misalignment, loosening, or displacement is found, the staff will manually slide and adjust the relative positions of the two slide blocks 5 to precisely adjust the distance between them, i.e., the position of the two insertion gaps 61. This ensures that the specifications and spacing of the insertion gaps 61 perfectly match the dimensions of the L-shaped pin ends and the tinned lead ends of the transformer under test. After the position adjustment is completed, the staff will tighten the first bolt 53 to lock and fix the slide block 5 in place on the crossbar 4, preventing positioning deviations caused by the displacement of the slide block 5 during testing. The staff will then place the transformer body on... On the upper surface of the longitudinal strip 7 on the tooling plate 3, the L-shaped pin end connecting the primary coil of the transformer is precisely inserted into the insertion gap 61 formed by the two sets of electrode plates 6 on the left. At the same time, the tinned lead end connecting the secondary coil of the transformer is precisely inserted into the insertion gap 61 formed by the two sets of electrode plates 6 on the right. This ensures that the electrode plate 6 on the left is stably electrically connected to one end of the tester 1 and the primary coil of the transformer, and the electrode plate 6 on the right is stably electrically connected to the other end of the tester 1 and the secondary coil of the transformer. This constructs a complete and stable electrical test circuit. The tester 1 is started at the same time. The tester 1 inputs a standard test current to the primary coil of the transformer and collects the feedback electrical signal from the secondary coil. This allows for the accurate detection of various electrical performance parameters of the transformer, such as winding continuity, inductance, and insulation withstand voltage. After all the test items of a single transformer are completed, the operator can directly lift the transformer body upwards to disengage the transformer pin end and lead end from the insertion gap 61 of the electrode plate 6, and the finished product can be quickly removed. Then, the next transformer to be tested is replaced and the above operation is repeated to achieve continuous automated testing of multiple batches and specifications of transformers. This invention uses an adjustable slide 5 in conjunction with an inverted isosceles trapezoidal crossbar 4 to flexibly adjust the position of the electrode plate 6, adapting to the testing of transformers of various specifications, thus solving the problems of frequent fixture changes and poor adaptability of traditional tooling.

[0024] Example 2: The transverse groove 31 has movable grooves 32 on its front and rear inner walls; the length direction of the movable groove 32 is consistent with the left and right direction; the front and rear ends of the electrode plate 6 are movably connected to the corresponding movable grooves 32 by square rods 62; the vertical thickness of the square rods 62 is adapted to the vertical width of the movable grooves 32; the lower edge of the electrode plate 6 has a notch 63; the front and rear inner walls of the notch 63 are fixedly connected to notches 64; the slide 5 has two guide grooves 54 for the notches 64 to move through it; the two guide grooves 54 are close to each other at the upper end and far apart at the lower end; the transverse bar 4 moves up and down in the transverse groove 31; the longitudinal bar 7 slides up and down in the longitudinal groove 33; the lower surface of the longitudinal bar 7 has a spring hole 71; the upper inner wall of the spring hole 71 is connected to the bottom of the longitudinal groove 33 by a return spring 72.

[0025] In its initial state, the return spring 72 inside the longitudinal groove 33 pushes the longitudinal bar 7 to its upper limit position. This, combined with the limiting action of the guide groove 54 and the missing rod 64, ensures that the insertion gaps 61 of the electrode plates 6 on both sides are at their maximum opening, facilitating the initial alignment and insertion of the transformer pins and leads. Once the transformer is placed above the longitudinal bar 7 and the pins and leads are inserted into the corresponding insertion gaps 61 on both sides, the transformer's own weight (and manual pressing) presses down on the longitudinal bar 7, causing it to slide downwards along the longitudinal groove 33 and compress the return spring 72. During this downward movement, the longitudinal bar 7, through structural linkage, drives the slide block 5 to move, causing the missing rod 64 to slide along the inclined guide groove 54. The front and rear ends of the electrode plates 6 then drive the square rod 62 along... The corresponding movable slot 32 moves left and right, thereby driving the two electrode plates 6 on the left and right sides to move closer to each other, synchronously reducing the insertion gap 61 on the left and right sides, adaptively clamping the L-shaped pin end and the tinned lead end of the transformer, ensuring that the electrode and the transformer end are in close contact, completely avoiding poor contact during the test. After the transformer test is completed and it is lifted and removed, the longitudinal bar 7 loses the downward pressure load, the return spring 72 rebounds and pushes the longitudinal bar 7 to move upward and reset. The linkage between the missing bar 64 and the guide slot 54 causes the two electrode plates 6 on both sides to separate from each other, the insertion gap 61 returns to the maximum opening state, and the clamping limit on the transformer end is quickly released, which is convenient for the next transformer alignment and clamping operation. This invention achieves adaptive clamping and reset of the insertion gap 61 by cooperating with the reset spring 72, the inclined guide groove 54 and the missing rod 64, which solves the technical problems of poor insertion and poor contact caused by the traditional insertion gap 61 being too small, making transformer testing more accurate.

[0026] Example 3: The guide groove 54 on the left side is corrugated; the two missing rods 64 on the slide 5 on the left side move closer or further apart as they oscillate back and forth under the guidance of their respective guide grooves 54; a voltage-conducting clamping part 65 is provided on the inner side of the electrode plate 6 on the left side.

[0027] During the adaptive clamping test of the transformer, because the guide groove 54 on the left side is designed with a corrugated structure, when the longitudinal bar 7 moves downward under the weight of the transformer and the pressing force, and is compressed by the return spring 72, the missing bar 64 on the slide block 5 on the left side slides along the corrugated guide groove 54, causing the two electrode plates 6 on the left side to move closer to each other. Because the guide groove 54 on the left side is corrugated, the two missing bars 64 will fluctuate and move closer to each other during the movement along the guide groove 54. During this process, the conductive clamping part 65 on the inner side of the electrode plate 6 continuously taps, squeezes and straightens the L-shaped pin end of the transformer, which can automatically... Before and during the test, the L-shaped pin ends that were slightly tilted, bent, or offset were corrected. The overall posture and verticality of the pins were rectified, and minor deformation defects of the pins were repaired. When the transformer was removed after the test, the return spring 72 rebounded and moved the longitudinal bar 7 upward. The missing bar 64 slid with the corrugated guide groove 54 and moved the two electrode plates 6 away from each other. After the correction, the L-shaped pin ends were in a regular posture without skew or deformation, and could be smoothly and accurately inserted into the assembly holes of the subsequent circuit board. This effectively avoided assembly jamming and incomplete insertion caused by pin skew, and ensured the smooth progress of subsequent transformer assembly operations. This invention uses the corrugated guide groove 54 and the conductive voltage clamping part 65 to cooperate and adaptively correct the deformation of the L-shaped pin by means of the linkage motion during the testing process, and to straighten the pin posture, thus solving the problem of difficult subsequent circuit board insertion and poor assembly accuracy caused by the skewed transformer pins.

[0028] Example 4: The front and rear width of the slide 5 on the right side is smaller than the front and rear width of the notch 63; there is a gap between the front and rear ends of the electrode plate 6 on the right side and the front and rear inner walls of the transverse groove 31; the bottom of the right half of the movable groove 32 is fixedly connected to the hemispherical block 34; the hemispherical blocks 34 on the front and rear sides are staggered in the left and right direction; the square rod 62 on the right side fluctuates back and forth under the pressure of the hemispherical blocks 34 on the front and rear sides; the inner side of the electrode plate 6 on the right side is provided with a conductive and elastic grinding disc 66, and the end of the square rod 62 is arc-shaped.

[0029] In this embodiment, the two electrode plates 6 on the right side fluctuate in opposite directions as they move closer to or further away from each other.

[0030] When the equipment performs adaptive clamping tests on the transformer, after the transformer is placed on the upper surface of the longitudinal bar 7, the longitudinal bar 7 is squeezed and moved downwards. The longitudinal bar 7 simultaneously drives the transverse bar 4 and the left and right side slides 5 to move downwards. During the downward movement of the slides 5, the two sets of electrode plates 6 are driven to move closer to each other. For the structure on the right side, because the bottom of the right half of the movable groove 32 is provided with front and rear hemispherical blocks 34 that are staggered left and right (the distance between the far ends of the two square rods 62 on the right side plus the distance between the bottom of a single hemispherical block 34 is equal to the distance between the bottom of the two movable grooves 32, and the distance between the far ends of the two square rods 62 on the left side is equal to the distance between the bottom of the two movable grooves 32), and the front and rear width of the slide 5 on the right side is less than the front and rear width of the notch 63, and the movable gap is reserved between the electrode plate 6 and the inner wall of the transverse groove 31, the square rods 62 of the electrode plate 6 on the right side are able to move closer together. During the activity, the lead wire is alternately squeezed by the staggered hemispherical blocks 34, causing the square rod 62 to move back and forth within the movable groove 32. The two electrode plates 6 on the right side will cause the polishing disc 66 to contact the lead end. As the two electrode plates 6 on the right side approach each other, they will cause the corresponding square rod 62 to move along the movable groove 32, so that the two electrode plates 6 on the right side will approach each other under the back and forth movement. The back and forth movement of the two electrode plates 6 on the right side is in opposite directions. During the back and forth movement of the electrode plates 6, the polishing disc 66 will polish the conductive layer on the surface of the lead end. The polishing disc 66 is continuously flattened. The conductive layer can be a tin layer or other materials. Polishing the lead end will also increase the conductive area between the lead end and the polishing disc 66, improve the test accuracy, and avoid poor contact. The present invention uses a misaligned hemispherical block 34 to cooperate with an electrode plate 6 in the opposite direction of the undulation on the right, and relies on an elastic grinding plate 66 to adaptively grind the conductive layer of the lead end, thereby reducing the roughness of the lead end, polishing away surface defects and making it smoother, which facilitates the subsequent perforation and assembly of the lead end.

[0031] Example 5: Two electrode plates 6 on the right side are provided with right-angled trapezoidal grooves 67 on their adjacent sides; an auxiliary strip 68 is provided on the inclined inner wall of the right-angled trapezoidal groove 67; the convex auxiliary strip 68 is slidably connected to the concave auxiliary block 69; the upper end of the auxiliary block 69 is connected to the upper inner wall of the right-angled trapezoidal groove 67 by a tension spring 691; the auxiliary block 69 is fixedly connected to the grinding disc 66; the two grinding discs 66 are provided with grinding patterns on their adjacent sides.

[0032] When the equipment performs adaptive clamping tests on the transformer, after the transformer is placed on the upper surface of the longitudinal bar 7, the longitudinal bar 7 is pressed down and moved downwards. The longitudinal bar 7 drives the transverse bar 4 and the right-side sliding block 5 to move downwards synchronously, thereby causing the two right-side electrode plates 6 to move closer to each other while oscillating back and forth. When the two right-side electrode plates 6 gradually approach and adhere to the transformer lead end, the electrode plates 6 will drive the grinding disc 66 to approach the lead end. The right-angled trapezoidal groove 67, which is narrower at the top and wider at the bottom, on the inner side of the electrode plate 6, together with the inclined auxiliary strip 68, forces the sliding connection to the auxiliary strip. The concave auxiliary block 69 on strip 68 slides downward along the inclined surface. During the sliding process, the auxiliary block 69 overcomes the tensile force of the tension spring 691 and simultaneously drives the grinding disc 66 fixed on the auxiliary block 69 to move downward. While the grinding disc 66 performs back-and-forth undulating grinding on the conductive layer of the lead end, it generates a vertical downward pressing and pulling force to straighten and correct the lead end vertically. This effectively corrects the micro-deformation, bending, and skewing problems of the lead end, further ensuring that the lead end is straight and regular overall, and providing a good structural foundation for the subsequent circuit board through-hole assembly operation of the transformer. The present invention uses a right-angled trapezoidal groove 67, an auxiliary block 69 and a tension spring 691 to enable the grinding disc 66 to have both grinding and vertical straightening functions, further standardize the shape of the lead end, and greatly improve the smoothness and accuracy of subsequent perforation assembly.

[0033] Example 6: The upper surface and left and right sides of the longitudinal strip 7 are provided with inverted T-shaped grooves 73; an inverted T-shaped block 74 is provided in the inverted T-shaped groove 73; the upper end of the inverted T-shaped block 74 is recessed and connected to an L-shaped corner block 76 by a torsion spring 75 (before the transformer is placed, the inner included angle of the L-shaped corner block 76 is tilted upward at 45 degrees).

[0034] In this embodiment, the distance between the left and right ends of the inverted T-shaped block 74 is less than the width of the longitudinal strip 7; the inverted T-shaped groove 73 is slidably connected to the inverted T-shaped block 74; the left and right ends of the inverted T-shaped block 74 are provided with second threaded holes 77; the second threaded holes 77 are internally threaded with second bolts 78.

[0035] When testing transformers of different specifications, the operator can loosen the second bolts 78 in the second threaded holes 77 at both ends of the inverted T-block 74 in advance to release the locking limit of the inverted T-block 74, allowing the inverted T-block 74 to slide and adjust its position along the inverted T-groove 73 on the longitudinal bar 7. This adjusts the installation position of the inverted T-block 74 and the L-shaped corner block 76 to accommodate transformers of different front and rear dimensions. After the position adjustment is completed, tighten the second bolts 78 to fix the position of the inverted T-block 74 (the tightening end of the second bolt 78 abuts against the left and right sides of the longitudinal bar 7 to form a friction lock). When the transformer is placed on the upper surface of the longitudinal bar 7 for clamping and grinding tests, the bottom of the transformer presses against the inner end of the L-shaped corner block 76, causing the L-shaped corner block 76 to overcome the elastic force of the torsion spring 75 and flip inward. After flipping, the upper end of the L-shaped corner block 76 fits against the front and rear end faces of the transformer, providing reliable positioning and constraint for the entire transformer. This effectively prevents the transformer from shifting or shaking during lead end grinding and pin straightening tests, ensuring stable and accurate grinding and calibration operations. The present invention, through the cooperation of adjustable inverted T-shaped block 74, second bolt 78 and torsion spring 75 type L-shaped corner block 76, can be adapted to limit and fix transformers of various specifications, effectively preventing workpiece shaking and displacement during testing and grinding, and improving testing and shaping accuracy.

[0036] Example 7: The guide groove 54 on the right is set to be corrugated in the same shape as the guide groove 54 on the left; the two notches 64 on the right move away from or closer to each other under the undulation.

[0037] During the adaptive clamping and polishing operation of the transformer lead end by the equipment, since the guide groove 54 on the right side is also set with a corrugated structure consistent with the structure on the left side, when the vertical bar 7 moves down and drives the slide block 5 to move, and the missing bar 64 slides along the guide groove 54 on the right side and drives the two electrode plates 6 on the right side to approach each other to clamp the lead end, the two electrode plates 6 on the right side do not directly stick together and clamp at once, but continuously generate a small undulating forward and backward, reciprocating approaching state along the trajectory of the corrugated guide groove 54, which effectively prolongs the contact polishing time between the polishing disc 66 and the conductive layer of the lead end. With the back-and-forth undulating polishing action of the electrode plate 6, the tin layer or other conductive layer on the surface of the lead end is polished more thoroughly.

[0038] Example 8: Conductive metal 35 is embedded in the bottom of the horizontal groove 31 and on the left and right sides of the vertical bar 7. The left and right conductive metal 35 are connected to the corresponding electrodes of the tester 1. The horizontal bar 4, slide 5, missing rod 64, electrode plate 6, auxiliary bar 68 and auxiliary block 69 are all conductive materials, which can realize the circuit connection after the slide 5 moves down into place; to avoid the situation of inaccurate test caused by premature connection (the pin end and lead end are not clamped and fully contacted before premature connection).

[0039] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 2 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, "fixed connection" refers to a fixed connection. In the description of the present invention, "sliding connection" refers to a connection where the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. "Sliding fit" refers to a connection where the two parts can slide and separate. In the description of the present invention, "rotational connection" refers to a connection where the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be provided on the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixed to the outer wall of the shaft.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-frequency switching power supply transformer testing device, comprising a tester and a fixture table on the left side of the tester; a fixture plate is placed on the fixture table; characterized in that: The tooling plate has a longitudinal groove for placing longitudinal bars on its upper surface; the tooling plate also has a transverse groove for placing transverse bars on its upper surface; the cross section of the transverse bar is an inverted isosceles trapezoid; the left and right ends of the transverse bar are slidably connected to the inverted isosceles trapezoidal grooves on the lower surface of the slide block; the inverted isosceles trapezoidal grooves have a first threaded hole facing rearward; a first bolt is threaded into the first threaded hole; two symmetrical electrode plates are connected to each slide block facing upward; an insertion gap is formed between the corresponding two electrode plates; the two electrode plates on the left are electrically connected to one end of the tester, and the two electrode plates on the right are electrically connected to the other end of the tester; The transverse groove has movable grooves on its front and rear inner walls; the length direction of the movable groove is consistent with the left and right direction; the front and rear ends of the electrode plate are movably connected to the corresponding movable grooves by square rods; the vertical thickness of the square rods is adapted to the vertical width of the movable grooves; the lower edge of the electrode plate has a notch; the notch is fixedly connected to the front and rear inner walls of the notch; the slide has two guide grooves for the notch to move through; the two guide grooves are close to each other at their upper ends and far apart at their lower ends; the transverse bar moves up and down in the transverse groove; the longitudinal bar slides up and down in the longitudinal groove; the lower surface of the longitudinal bar has a spring hole; the upper inner wall of the spring hole is connected to the bottom of the longitudinal groove by a return spring.

2. The high-frequency switching power supply transformer testing equipment according to claim 1, characterized in that: The guide groove on the left is corrugated; the two notches on the slide on the left are guided by their respective guide grooves and move back and forth, moving closer or further apart; the electrode plate on the left has a voltage-conducting tightness part on its inner side.

3. The high-frequency switching power supply transformer testing equipment according to claim 2, characterized in that: The front-to-back width of the slide block on the right side is smaller than the front-to-back width of the notch; there is a gap between the front and rear ends of the electrode plate on the right side and the front and rear inner walls of the transverse groove; a hemispherical block is fixed to the bottom of the right half of the movable groove; the hemispherical blocks on the front and rear sides are offset in the left and right directions; the square rod on the right side fluctuates back and forth under the pressure of the hemispherical blocks on the front and rear sides; a conductive and elastic grinding disc is provided on the inner side of the electrode plate on the right side.

4. The high-frequency switching power supply transformer testing equipment according to claim 3, characterized in that: The two electrode plates on the right side fluctuate in opposite directions as they move closer to or further apart.

5. The high-frequency switching power supply transformer testing equipment according to claim 3, characterized in that: Two electrode plates on the right side are provided with right-angled trapezoidal grooves on their adjacent sides; an auxiliary strip is provided on the inclined inner wall of the right-angled trapezoidal groove; the auxiliary strip is slidably connected to a concave auxiliary block; the upper end of the auxiliary block is connected to the upper inner wall of the right-angled trapezoidal groove by a tension spring; the auxiliary block is fixedly connected to the grinding disc; the two grinding discs are provided with grinding patterns on their adjacent sides.

6. The high-frequency switching power supply transformer testing equipment according to claim 3, characterized in that: The upper surface and left and right sides of the longitudinal strip are provided with inverted T-shaped grooves; an inverted T-shaped block is provided in the inverted T-shaped groove; an L-shaped corner block is rotatably connected to the upper recessed position of the inverted T-block by a torsion spring.

7. The high-frequency switching power supply transformer testing equipment according to claim 6, characterized in that: The distance between the left and right ends of the inverted T-shaped block is less than the width of the longitudinal strip; the left and right ends of the inverted T-shaped block are provided with second threaded holes; the second threaded holes are internally threaded with second bolts.

8. The high-frequency switching power supply transformer testing equipment according to claim 3, characterized in that: The guide groove on the right is designed to be corrugated in the same shape as the guide groove on the left; the two notches on the right move away from or closer to each other as they oscillate.

9. A high-frequency switching power supply transformer testing device according to claim 5, characterized in that: Conductive metal is embedded in the bottom of the horizontal groove and on the left and right sides of the vertical bar. The left and right conductive metals are connected to the corresponding electrodes of the tester. The horizontal bar, slide, missing rod, electrode plate, auxiliary bar and auxiliary block are all conductive materials, which can realize the circuit connection after the slide moves down into place.

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