High frequency resistance welding transformer

Abstract

A high-frequency resistance welding transformer includes a secondary current connection seat assembly, a secondary coil arranged below the secondary current connection seat assembly, an iron core mounted on the secondary coil, a primary coil arranged between the secondary coils, a primary current terminal led by the primary coil, a positive connection plate and a negative connection piece arranged above the secondary current connection seat assembly, a positive output seat connected to the positive connection plate, a negative input seat connected to the negative connection piece, a rectifier diode arranged between two adjacent positive connection plates and clamped by a clamp, the positive connection plates are arranged in parallel front and back, so that the clamp is away from the negative connection piece and the distance between the two is ≥20mm, the positive output seat is arranged on the top of the positive connection plate, and the negative input seat is arranged on the top of the negative connection piece. It can greatly reduce the eddy current generated by the clamp, improve the high-frequency current output capacity of the resistance welding transformer, improve the resistance welding performance, and meet the needs of high-frequency welding production.

Description

Technical Field

[0001] The invention relates to a resistance welding transformer, in particular to a high-frequency resistance welding transformer. Background Art

[0002] Resistance welding is an important equipment for realizing welding automation in the welding field. With the development of industry and the continuous improvement of product quality requirements in modern society, resistance welding has been widely used in the automotive and aviation industries due to its excellent corrosion resistance and good welding performance.

[0003] The positive connecting plates in the existing resistance welding transformer are arranged on the left and right sides, and the clamps can only be installed on the left and right sides of the positive connecting plates. The clamps located between the positive connecting plates and the negative connecting pieces generate many eddy currents, the high-frequency current output capacity of the resistance welding transformer is weak, and the resistance welding performance is poor, which cannot meet the needs of high-frequency welding production. Summary of the invention

[0004] The present invention is to solve the above technical problems and provide a high-frequency resistance welding transformer, which can greatly reduce the eddy current generated by the clamping plate, improve the high-frequency current output capacity of the resistance welding transformer, improve the resistance welding performance, and meet the needs of high-frequency welding production.

[0005] The technical solution of the present invention is:

[0006] A high-frequency resistance welding transformer comprises a secondary current connection seat assembly, a secondary coil arranged below the secondary current connection seat assembly, an iron core sleeved on the secondary coil, a primary coil arranged between the secondary coils, a primary current terminal led by the primary coil, a plurality of positive connection plates and negative connection pieces arranged above the secondary current connection seat assembly, a positive output seat connected to the positive connection plate, a negative input seat connected to the negative connection piece, the positive connection plate and the negative connection piece arranged left and right, a rectifier diode arranged between two adjacent positive connection plates and clamped by a clamping plate, cooling water channels are arranged in the positive output seat, the positive connection plate, the secondary current connection seat assembly, the secondary coil, the negative connection piece and the negative input seat, and the special feature is that the positive connection plates are arranged in parallel front and back, so that the clamping plate is away from the negative connection piece and the distance between the two is ≥20 mm, the positive output seat is arranged on the top of the positive connection plate, and the negative input seat is arranged on the top of the negative connection piece.

[0007] Furthermore, the iron core is an amorphous iron core or a nanocrystalline iron core, which makes the iron core single piece thinner and the magnetic lines of force stronger, thereby improving the magnetic saturation density of the iron core and facilitating high-frequency output.

[0008] Furthermore, the negative electrode connector is columnar, which increases the specific surface area, improves the current output capacity at high frequency, and improves the bending resistance.

[0009] Furthermore, the secondary current connection seat assembly is composed of a negative electrode bottom plate, two positive electrode middle seats arranged front and back, and a negative electrode top seat located on the negative electrode bottom plate and insulated from the positive electrode middle seats and electrically connected to the negative electrode bottom plate.

[0010] Furthermore, the front-to-back arranged positive electrode middle seats are high on the left and low on the right, with long steps and short steps facing upwards, and the bottom of the negative electrode top seat is provided with an L-shaped step facing downwards. The L-shaped step is buckled with the long step and the short step, making the secondary current connection seat assembly structure compact and regular.

[0011] Furthermore, the primary coil is formed by winding multiple strands of T2 flat copper enameled wire in parallel. The T2 flat copper enameled wire after parallel connection is wrapped with an epoxy resin layer, which reduces the overall volume of the primary coil, improves the insulation performance, facilitates processing, increases the specific surface area of ​​the primary coil conductor, and improves the primary current conductivity, thereby meeting the requirements of high-power medium and high frequency transformers.

[0012] Furthermore, the iron core is an amorphous iron core, and the thickness of each amorphous iron core is 0.03-0.04 mm.

[0013] Furthermore, the iron core is a nanocrystalline iron core, and the thickness of each nanocrystal is 0.02-0.03 mm.

[0014] Furthermore, a Rogowski coil is arranged on the positive output socket or the negative connection socket.

[0015] The beneficial effects of the present invention are as follows: a plurality of positive connecting plates are arranged in parallel front and back, so that the clamping plate is away from the negative connecting piece and the shortest distance between the two is ≥20mm; the positive output seat is arranged on the top of the positive connecting plate and the negative input seat is arranged on the top of the negative connecting piece, so that the current directions of the positive connecting plate and the negative connecting seat are parallel, the eddy current is reduced, and the current output capacity under high frequency is improved, so that the high-frequency resistance welding transformer outputs a high-frequency current of 3k-10kHZ and a current value of 20,000-40,000A, which meets the needs of high-frequency welding production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the secondary current connection seat assembly;

[0018] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle negative electrode top seat;

[0019] In the figure: 1-secondary current connection seat assembly, 2-secondary coil, 3-iron core, 4-primary coil, 5-primary current terminal, 6-positive connection plate, 7-negative connector, 8-Rogowski coil, 9-positive output seat, 10-negative input seat, 11-rectifier diode, 12-clamping plate, 13-cooling water channel, 101-negative bottom plate, 102-positive middle seat, 103-negative top seat. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 3 As shown, the high-frequency resistance welding transformer includes a secondary current connection seat assembly 1, a secondary coil 2, an iron core 3 and a primary coil 4. The secondary current connection seat assembly 1 is composed of a negative bottom plate 101, two positive middle seats 102 arranged front and back, and a negative top seat 103 located on the negative bottom plate 101 and insulated from the positive middle seat 102 and electrically connected to the negative bottom plate 101. The positive middle seats 102 on the front and back sides are long steps and short steps with the left side higher and the right side lower and the step faces facing upwards. The bottom of the negative top seat 103 is provided with a step The ladder surface is an L-shaped ladder facing downward, and the L-shaped ladder is buckled with the long ladder and the short ladder; the secondary coil 2 is a U-shaped tube and is arranged side by side on the left and right and is divided into two groups front and back, the primary iron core 3 is embedded between the two secondary coils 2 arranged side by side on the left and right, the primary coil 4 is clamped between the two groups of secondary coils 2 on the front and back, the secondary coil 2 is inserted and welded in the mounting hole on the lower surface of the secondary current connection seat assembly 1, the iron core 3 is a nanocrystalline iron core 3, each nanocrystalline has a thickness of 0.025mm, and the primary coil 4 adopts multiple strands The T2 flat copper enameled wires are wound in parallel, and the T2 flat copper enameled wires after parallel connection are wrapped with an epoxy resin layer. The primary current terminal 5 is connected to the lead-out end of the primary coil 4, and a plurality of positive electrode connecting plates 6 and columnar negative electrode connecting pieces 7 arranged in parallel front and back are arranged on the secondary current connecting seat assembly 1. The positive electrode connecting plates 6 and the negative electrode connecting pieces 7 are arranged left and right, and a Rogowski coil 8 is arranged on the negative electrode connecting seat. A positive electrode output seat 9 is installed on the upper end of the positive electrode connecting plate 6, and a negative electrode input seat 10 is installed on the upper end of the negative electrode connecting piece 7. The output seat is arranged at the top of the positive connecting plate, and the negative input seat is arranged at the top of the negative connecting piece. A rectifier diode 11 is arranged between two adjacent positive connecting plates 6. The rectifier diode 11 is clamped by a clamping plate 12 arranged outside the outer positive connecting plate. The clamping plate 12 is away from the negative connecting piece 7 and the distance between the two is ≥20mm. Interconnected cooling water channels 13 are arranged in the positive output seat 9, the positive connecting plate 6, the secondary current connecting seat assembly 1, the secondary coil 2, the negative connecting piece 7 and the negative input seat 10.

[0021] The current flowing through the positive connecting plate 6 and the negative connecting seat is parallel, which reduces eddy current and improves the current output capacity under high frequency, so that the high-frequency resistance welding transformer outputs a high-frequency current with a frequency of 3k-10kHZ and a current value of 20,000-40,000A, meeting the needs of high-frequency welding production.

[0022] The above are only specific embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-frequency resistance welding transformer, comprising a secondary current connection seat assembly, a secondary coil arranged below the secondary current connection seat assembly, an iron core sleeved on the secondary coil, a primary coil arranged between the secondary coils, a primary current terminal led by the primary coil, a plurality of positive connection plates and negative connection pieces arranged above the secondary current connection seat assembly, a positive output seat connected to the positive connection plate, a negative input seat connected to the negative connection piece, the positive connection plate and the negative connection piece arranged left and right, a rectifier diode arranged between two adjacent positive connection plates and clamped by a clamping plate, a cooling water channel is provided in the positive output seat, the positive connection plate, the secondary current connection seat assembly, the secondary coil, the negative connection piece and the negative input seat, the positive connection plates are arranged in parallel front and back, Features: The secondary current connection seat assembly consists of a negative bottom plate, two positive middle seats arranged front and back, and a negative top seat located on the negative bottom plate and insulated from the positive middle seat and electrically connected to the negative bottom plate. A screw hole is provided on the front facade of the positive middle seat so that the clamping plate is away from the negative connector and the distance between the two is ≥20mm. The positive output seat is arranged on the top of the positive connecting plate, and the negative input seat is arranged on the top of the negative connector. The iron core is an amorphous iron core or a nanocrystalline iron core.

2. The high frequency resistance welding transformer according to claim 1, Features: The negative electrode connector is columnar.

3. The high frequency resistance welding transformer according to claim 1, Features: The front and rear arranged positive electrode middle seats are long and short steps with the left side higher and the right side lower and the steps facing upwards. The bottom of the negative electrode top seat is provided with an L-shaped step facing downwards, and the L-shaped step is buckled with the long and short steps.

4. The high frequency resistance welding transformer according to claim 1, Features: The primary coil is formed by winding multiple strands of T2 flat copper enameled wires in parallel, and the parallel-connected T2 flat copper enameled wires are wrapped with an epoxy resin layer.

5. The high frequency resistance welding transformer according to claim 1, Features: The iron core is an amorphous iron core, and the thickness of each amorphous iron core is 0.03-0.04 mm.

6. The high frequency resistance welding transformer according to claim 1, Features: The iron core is a nanocrystalline iron core, and the thickness of each nanocrystalline is 0.02-0.03 mm.

7. The high frequency resistance welding transformer according to claim 1, Features: A Rogowski coil is arranged on the positive output socket or the negative connection socket.

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