High-frequency brazing device for magnetic circuit assembly

Abstract

The utility model belongs to the technical field of machining, and discloses a magnetic circuit assembly high-frequency brazing device which comprises a supporting base, a positioning base, a pressing block, a pressurizing rod and a fixing plate. The pressurizing rod penetrates through an inner hole of the fixing plate to be connected with the pressing block and then is embedded into the supporting base. The positioning base is located in the center of the supporting base. The fixture can ensure that a fine and stable welding gap is kept between the magnetic steel and the magnetizer of the magnetic circuit assembly, due to the existence of the positioning base, the bottom surface of a to-be-welded part can ensure higher planeness after the part is preassembled, and each part of the fixture in contact with the part is made of a high-temperature-resistant and easily-processed non-metal material, so that the welding quality is improved. And adhesion with a to-be-welded part in the welding process is avoided. The clamp is simple in structure, fast to assemble and disassemble and capable of effectively guaranteeing the assembling and welding precision and quality of the magnetic circuit assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and particularly relates to a high-frequency brazing device for a magnetic circuit component. Background Art

[0002] The magnetic circuit assembly welds two pieces of magnetic steel to both sides of the magnetizer to form a ring-shaped magnetic circuit. Considering the influence of high temperature on the magnetic properties of magnetic steel, the existing process method uses medium and low temperature solder to connect through high-frequency induction brazing. The magnetic resistance of the solder at the connection is large, and the thickness of the gap layer must be effectively controlled to reduce the influence of the gap layer on the magnetic properties of the assembly; in order to meet the subsequent assembly requirements, the magnetic circuit assembly has high requirements for the flatness of the bottom surface after welding. If the clamp is not used to constrain it during welding, it may cause the size of the parts after welding to exceed the tolerance; in addition, the solder will flow during high-frequency brazing. In order to prevent the fixture from adhering to the parts through the solder, high-temperature resistant non-metallic materials must be used as the fixture material. The traditional method uses an integrated metal fixture with a rough structure, uneven force on both sides of the parts to be welded, and the bottom surface cannot maintain a high flatness while clamping. In addition, the metal fixture will heat up under high-frequency current and may adhere to the parts, causing the parts to be scrapped, seriously affecting the stability of the welding process. Utility Model Content

[0003] The purpose of this utility model is to provide a high-frequency brazing device for magnetic circuit components in view of the above-mentioned existing problems, so as to ensure a small and stable welding gap between the magnetic steel and the magnetic conductor of the magnetic circuit component. Due to the presence of the positioning base, the bottom surface of the parts to be welded can ensure a high flatness after pre-installation, and all parts of the fixture in contact with the parts are made of high-temperature resistant and easy-to-process non-metallic materials to ensure that the welding process does not adhere to the parts to be welded. The fixture has a simple structure and is quick to load and unload, which can effectively ensure the assembly, welding accuracy and quality of the magnetic circuit component.

[0004] The technical solution of this utility model:

[0005] A high-frequency brazing device for a magnetic circuit assembly comprises a supporting base, a positioning base assembly, and two sets of positioning units, wherein the positioning units comprise: a pressing block, a pressure rod, and a fixing plate;

[0006] The support base is a rectangular parallelepiped, with a linear groove on the upper surface along the length direction, a positioning base mounting groove on the middle of the upper surface of the support base, and fixing plate mounting grooves on both ends of the upper surface of the support base;

[0007] The positioning base assembly is arranged in the positioning base installation groove, and the magnetic circuit assembly to be welded is placed and positioned on the upper surface of the positioning base assembly;

[0008] The fixing plate is a rectangular plate with a threaded inner hole, which is placed in the fixing plate installation groove;

[0009] The pressure rod is provided with an external thread, and the pressure rod passes through the threaded inner hole of the fixing plate and is connected with the pressure block before being embedded in the support base;

[0010] The pressing rod is rotated to push the pressing block to move, thereby pressing and fixing the magnetic circuit component to be welded.

[0011] The positioning base assembly is connected to the supporting base by screws. The positioning base assembly includes a group of positioning bases provided with different positioning grooves. The positioning base is replaced according to the shape of the magnetic circuit assembly to be welded.

[0012] The front end of the pressure rod 4 is connected to the pressure block 3. After the parts to be welded are pre-loaded into the positioning base 2, the pressure rod 4 pushes the front end surface of the pressure block 3 to close to the side of the parts, so that a small gap is maintained between the parts to be welded to complete the assembly positioning.

[0013] In a possible embodiment, the positioning base 2 is connected to the supporting base 1 by screws, and the positioning base 2 is detachable. The positioning base 2 provided with positioning grooves 21 and 22 of different shapes can be replaced according to parts of different shapes.

[0014] In a possible embodiment, symmetrical linear grooves 11 are symmetrically provided on the upper surface of the support base 1 , the pressing block 3 and the fixing plate 5 are embedded in the grooves 11 , and the bottom surface of the grooves is slightly higher than the upper surface of the positioning base 2 .

[0015] In a possible embodiment, the pressure rod 4 is connected to the inner hole of the fixing plate 5 by a thread, and the pressure block 3 is connected to the pressure rod 4 by a spring. Rotating the pressure rod 4 can push the pressure block 3 to slide along the groove 11 to clamp the parts. This process slowly and evenly clamps the parts, and this pressure level can be stably maintained during the welding process to ensure that the weld gap does not change.

[0016] In a possible embodiment, the pressure block 3, the pressure rod 4 and the fixing plate 5 are symmetrically distributed on both sides of the part to be welded 6, and are at the same horizontal position as the part to be welded 6. The position of the magnetic steel 62 on both sides of the magnet 61 and the gap on both sides can be adjusted independently.

[0017] In a possible embodiment, the support base 1, the positioning base 2 and the pressing block 3 are made of non-metallic materials that are resistant to high temperatures, easy to process and will not be brazed with the parts to be welded, and one of asbestos cement, microcrystalline glass, ceramics, and epoxy cotton cloth board is selected. The upper surface of the positioning base 2 can ensure a high degree of flatness, and the part of the fixture that contacts the parts to be welded will not adhere to the parts through the brazing material at high temperatures.

[0018] Advantages and beneficial effects of the utility model:

[0019] The device can realize the following functions:

[0020] 1. The fixture can ensure a small and uniform welding gap between the magnetic conductor and the magnetic steel of the magnetic circuit assembly, effectively reducing the loss of magnetic performance of the magnetic circuit assembly.

[0021] 2. The fixture can ensure that the bottom surface of the magnetic circuit assembly has a high degree of flatness after welding, thereby improving the efficiency and success rate of subsequent assembly and adjustment.

[0022] 3. The positioning base of the fixture is replaceable and can weld magnetic circuit components of different shapes and sizes.

[0023] 4. The fixture does not adhere to the parts, which improves the welding qualification rate.

[0024] 5. The contact area between the fixture and the parts is small, making loading and unloading easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0027] Figure 1 : A top view of a welding fixture for high-frequency brazing of magnetic circuit components;

[0028] Figure 2 : Schematic diagram of the structure of the support base 1;

[0029] Figure 3 : Schematic diagram of the structures of two positioning bases 2; Figure 3 (a) is a square positioning base, Figure 3 (b) is a circular positioning base;

[0030] Figure 4 : Schematic diagram of the structure of the part 6 to be welded;

[0031] Figure 5 : A cross-sectional view along the center of the welding fixture after the part 6 to be welded is loaded.

[0032] Among them, 1: support base; 11: linear groove; 2: positioning base; 21: square positioning base; 22: circular positioning base; 3: pressure block; 4: pressure rod; 5: fixing plate; 6: parts to be welded; 61: magnetic conductor; 62: magnetic steel. DETAILED DESCRIPTION

[0033] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to better implement the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. Figure 1-5 :

[0035] like Figure 1-5 As shown, a high-frequency brazing device for a magnetic circuit component comprises a supporting base 1, a positioning base 2, a pressure block 3, a pressure rod 4 and a fixing plate 5. The pressure rod 4 passes through the inner hole of the fixing plate 5 and is connected to the pressure block 3, and then is embedded in the supporting base 1. The positioning base 2 is located at the center of the supporting base 1, and its upper surface is in contact with the bottom surface of the part 6 to be welded; the front end of the pressure rod 4 is connected to the pressure block 3. After the part 6 to be welded is pre-loaded into the positioning base 2, the front end of the pressure block 3 is pushed to be close to the side of the part by rotating the pressure rod 4, so that a small gap is maintained between the parts of the part 6 to be welded, and the assembly positioning is completed; the positioning base 2 is connected to the supporting base 1 by screws, and the positioning base 2 is detachable. The positioning base 2 provided with positioning grooves 21 and 22 of different shapes can be replaced according to parts of different shapes; the upper surface of the supporting base 1 is symmetrically provided with A linear groove 11 is provided, in which the pressure block 3 and the fixing plate 5 are embedded, and the bottom surface of the groove is slightly higher than the upper surface of the positioning base 2; the pressure rod 4 is connected to the inner hole of the fixing plate 5 by a thread, and the pressure block 3 is connected to the pressure rod 4 by a spring, and rotating the pressure rod 4 can push the pressure block 3 to clamp the part; the pressure block 3, the pressure rod 4 and the fixing plate 5 are symmetrically distributed on both sides of the part to be welded 6, and are approximately at the same horizontal position as the part to be welded 6; the support base 1, the positioning base 2 and the pressure block 3 are made of non-metallic materials that are resistant to high temperature, easy to process and not brazed with the part to be welded 6. The support base 1 is made of epoxy cotton cloth board, the positioning base 2 is made of microcrystalline glass, and the pressure block 3 is made of asbestos cement.

[0036] When using the above fixture for processing, the steps are as follows:

[0037] (1) According to the shape of the parts to be welded, select different shapes of positioning bases 2 and fix them in the center position of the supporting base 1 with screws.

[0038] (2) Place the pressure block 3 in the groove 11 of the support base 1. The pressure rod 4 passes through the inner hole of the fixing plate 5 and is connected to the pressure block 3 through a spring. Adjust the pressure block 3 so that it does not exceed the end of the groove 11 of the support base 1.

[0039] (3) The magnet 61 and the magnet 62 are embedded into the positioning base 2. The pressure rods 4 on both sides are rotated to push the pressure block 3 to clamp the magnet 62, and the gap between the magnet 62 and the magnet 61 is controlled. After welding is completed, the pressure rods 4 are rotated to unload the force and the parts can be directly taken out.

[0040] Embodiment 1:

[0041] The difference between Example 1 and the above-mentioned specific implementation is that different positioning bases 2 can be replaced according to different shapes of magnetic circuit components, such as Figure 3 As shown, the square positioning base 21 and the circular positioning base 22 can maintain a high positioning accuracy when pre-assembling parts, thereby improving the weld quality and dimensional accuracy.

[0042] Embodiment 2:

[0043] The difference between Example 2 and the above-mentioned specific implementation is that the pressure rods on both sides push the pressure block to generate a stable clamping force in the horizontal direction, which is perpendicular to the welding gap of the magnetic circuit assembly. Figure 5 As shown, a uniform and small gap can be produced, which facilitates the uniform filling of the brazing material and improves the quality of the weld.

[0044] The utility model solves the problems of uneven control of the brazing gap on both sides, low flatness of the bottom surface of the magnetic circuit assembly after welding, and easy adhesion of parts to the fixture after welding when welding magnetic circuit assemblies of different shapes and sizes. The fixture has a simple structure and is quick to load and unload, which can effectively ensure the assembly, welding accuracy and quality of the magnetic circuit assembly.

Claims

1. A high-frequency brazing device for a magnetic circuit assembly, characterized in that: It includes a supporting base, a positioning base assembly, and two sets of positioning units, wherein the positioning units include: a pressing block, a pressure rod, and a fixing plate; The support base is a rectangular parallelepiped, with a linear groove on the upper surface along the length direction, a positioning base mounting groove on the middle of the upper surface of the support base, and fixing plate mounting grooves on both ends of the upper surface of the support base; The positioning base assembly is arranged in the positioning base installation groove, and the magnetic circuit assembly to be welded is placed and positioned on the upper surface of the positioning base assembly; The fixing plate is a rectangular plate with a threaded inner hole, which is placed in the fixing plate installation groove; The pressure rod is provided with an external thread, and the pressure rod passes through the threaded inner hole of the fixing plate and is connected with the pressure block before being embedded in the support base; The pressing rod is rotated to push the pressing block to move, thereby pressing and fixing the magnetic circuit component to be welded.

2. A high frequency brazing device for a magnetic circuit assembly as claimed in claim 1, characterized in that: The positioning base assembly is connected to the supporting base by screws. The positioning base assembly includes a group of positioning bases provided with different positioning grooves. The positioning base is replaced according to the shape of the magnetic circuit assembly to be welded.

3. A high frequency brazing device for a magnetic circuit assembly as claimed in claim 1, characterized in that: The bottom surface of the linear groove is flush with the upper surface of the positioning base.

4. A high frequency brazing device for a magnetic circuit assembly as claimed in claim 1, characterized in that: The pressing block is connected to the pressing rod through a spring, and the pressing force is transmitted through the spring.

5. A high frequency brazing device for a magnetic circuit assembly as claimed in claim 1, characterized in that: The supporting base, the positioning base and the pressing block are made of high temperature resistant non-metallic materials.

6. A high frequency brazing device for a magnetic circuit assembly as claimed in claim 1, characterized in that: The high temperature resistant non-metallic material is one of asbestos cement, glass-ceramic, ceramic, and epoxy cotton cloth board.

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