A high-voltage contactor brazing tool

Abstract

The present invention discloses a novel structure of high-voltage contactor brazing tooling, which includes an upper mold, a lower mold, a main contact pressure block and an auxiliary pressure block. By setting auxiliary contact pressure block positioning holes, main contact pressure block positioning holes, positioning blocks and positioning columns, the auxiliary contact positioning holes on the positioning blocks and the auxiliary contact pressure block positioning holes cooperate with the auxiliary pressure blocks to ensure accurate positioning of the auxiliary contacts; the positioning columns and the main contact pressure block positioning holes cooperate with the main contact pressure blocks to ensure accurate positioning of the ceramic cover assembly, and reliably achieve brazing of the ceramic cover assembly with auxiliary contacts. By optimizing the tooling structure, the upper mold and the lower mold can achieve mutual positioning, and the production capacity can be improved through multi-layer assembly and arrangement; the multiple layers can be freely combined according to the shape and volume of the equipment; at the same time, the upper mold and the lower mold can be quickly stacked by self-positioning, which improves work efficiency, is stable in placement, and greatly reduces the cost of brazing processing.

Description

Technical Field

[0001] The present invention relates to the technical field of welding tooling, and in particular to a high-voltage contactor brazing tooling. Background Art

[0002] With the development of the new energy industry, the requirements for high-voltage DC contactors are becoming increasingly stringent. Electric vehicles often use high-voltage technology to achieve rapid charging. To improve the withstand voltage rating, high-voltage DC contactors for electric vehicles generally use ceramic as the arc-extinguishing medium. The high-temperature vacuum brazing tooling of the ceramic assembly is key to achieving ceramic insulation.

[0003] Brazing uses a filler metal with a lower melting point than the parent metal. The workpieces and filler metal are heated together to a temperature above the filler metal's melting point but below that of the parent metal. This causes the filler metal to melt while the parent metal remains solid. Capillary action allows the liquid filler metal to fill gaps between the solid base metals, where it penetrates and diffuses across the surface. Once the filler metal cools and solidifies, the metals are joined. Vacuum brazing is a brazing process performed in a vacuum environment and is typically used for brazing operations requiring a high degree of atmosphere-free performance. The vacuum brazing process eliminates impurities such as oxygen and moisture to prevent defects such as weld porosity and oxidation, thereby ensuring the quality of the brazed joint. Vacuum brazing fixtures are devices or fixtures used to support, position, clamp, and protect brazed parts and equipment. During the vacuum brazing process, the fixture secures and stabilizes the workpieces, ensuring precise assembly and brazing operations. It also provides environmental control and protection, ensuring quality and safety.

[0004] With the popularization of intelligent and diversified electric vehicle industry, it is necessary to set up auxiliary contact circuit in addition to the main circuit in high voltage DC contactor to switch auxiliary signals at the same time. Adding auxiliary contacts in high voltage DC contactor makes the structure of ceramic cover assembly more and more complicated. Figure 1-Figure 5 As shown, it includes a main contact, a ceramic cover, an auxiliary contact and a yoke iron plate; a yoke iron plate is installed at the bottom of the ceramic cover, and a top plate is provided on the top of the ceramic cover, and main contacts are provided on the outer walls at both ends of the length direction of the top plate, and a square welding piece is installed between the main contact and the top plate; an auxiliary contact is installed between the two main contacts, and a transition piece is installed between the end of the auxiliary contact away from the yoke iron plate and the top plate, the transition piece is fitted on the auxiliary contact, and an auxiliary circular welding piece is fixedly installed on the side of the transition piece away from the top plate; a circular welding piece is installed between the ceramic cover and the yoke iron plate.

[0005] The above-mentioned ceramic cover assembly is equipped with main contacts and auxiliary contacts at the same time, and requires brazing tooling and high-temperature vacuum brazing technology to weld multiple brazing materials. Its production places higher requirements on high-temperature vacuum brazing tooling.

[0006] At the same time, with the country's strong support for electric vehicles, the number of electric vehicles has increased dramatically, the production and maintenance rates of electric vehicles have increased significantly, and the demand for high-voltage DC contactors has increased dramatically. Therefore, it is urgent to improve the high-voltage contactor brazing tooling to improve the production efficiency of high-voltage DC contactors and adapt to the ever-increasing demand for accessories.

[0007] In summary, there is an urgent need for a high-voltage contactor brazing tool to solve the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention provides a high-voltage contactor brazing tool. This solves the problem that existing vacuum brazing tools cannot add auxiliary contacts to high-voltage DC contactors, failing to meet actual production and customer needs. Furthermore, existing vacuum brazing tools suffer from low production efficiency, failing to meet the growing demand for high-voltage DC contactors. The various technical effects achieved by the preferred technical solutions provided by the present invention are detailed below.

[0009] The present invention proposes a high-voltage contactor brazing tool, which includes an upper mold, a lower mold, a main contact pressing block and an auxiliary pressing block. The upper mold is installed above the lower mold; the main contact pressing block is installed above the upper mold; and the auxiliary pressing block is installed above the upper mold.

[0010] The upper mold includes a support plate, which is arranged at the bottom of the upper mold, and a lower exhaust groove is opened at the bottom of the support plate; an auxiliary contact pressure block positioning hole is provided in the lower exhaust groove and passes through the upper and lower parts; a first support block, a second support block and a third support block are fixedly installed on the upper surface of the support plate; the first support block is fixedly installed in the middle of the length direction of the support plate; the second support block is fixedly installed at the four corners of the support plate; the third support block is fixedly installed between the first support block and the second support block; the third support block is arranged corresponding to the lower exhaust groove; an upper exhaust groove is provided between the first support block, the second support block and the third support block; four second support blocks and four third support blocks are each provided; a main contact pressure block positioning hole passing through downwards is provided in the upper exhaust groove between adjacent second and third support blocks; a main contact pressure block positioning hole passing through downwards is provided in the upper exhaust groove between adjacent third support blocks and first support blocks; a second air vent is provided at the center of the first support block, and a second air vent is provided at the center of the two main contact pressure block positioning holes at one end of the length direction of the support plate.

[0011] The lower mold includes a base plate, and positioning plates are fixedly installed at the four corners of the base plate, a positioning groove is provided on the top of the positioning plate, and the bottom of the positioning plate extends to the bottom of the base plate; a first air vent is provided at the center of the base plate; downwardly concave limiting grooves are provided at the four corners of the upper surface of the base plate, a positioning block is fixedly installed at the center position of the limiting groove, and an auxiliary contact positioning hole is provided on the top of the positioning block; a plurality of positioning columns are fixedly installed on the upper surface of the limiting groove, and the positioning columns are symmetrically distributed with respect to the cross-section of the width direction of the positioning block.

[0012] As a preferred solution of the present invention, the support plate can be embedded in the positioning groove.

[0013] As a preferred solution of the present invention, the inner wall of the bottom of the positioning plate can be engaged with the outer wall of the second supporting block.

[0014] As a preferred solution of the present invention, the first air hole is arranged corresponding to the second air hole at the center of the first support block to form a through hole that passes through from top to bottom.

[0015] As a preferred solution of the present invention, an auxiliary pressing block is installed in the auxiliary contact pressing block positioning hole, a circular hole is provided at the bottom of the auxiliary pressing block, and the auxiliary contact in the ceramic cover assembly is inserted into the circular hole.

[0016] As a preferred solution of the present invention, the main contact pressing block is installed in the main contact pressing block positioning hole, a through hole is provided in the axial direction of the main contact pressing block, and the main contact in the ceramic cover assembly is inserted into the through hole.

[0017] As a preferred solution of the present invention, the upper mold and the lower mold are made of a new graphene material that is resistant to high temperatures and has a low thermal expansion coefficient.

[0018] As a preferred solution of the present invention, the positioning block and the positioning column are made of a precision alloy having a thermal expansion coefficient similar to that of the ceramic cover.

[0019] As a preferred solution of the present invention, the main contact pressing block and the auxiliary contact pressing block are made of high-temperature resistant stainless steel.

[0020] As a preferred solution of the present invention, the upper mold and the lower mold are assembled and arranged in multiple layers.

[0021] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0022] 1. The high-voltage contactor brazing tooling presented in the present invention provides auxiliary contact pressure block positioning holes, main contact pressure block positioning holes, positioning blocks and positioning columns. The auxiliary contact positioning holes on the positioning blocks and the auxiliary contact pressure block positioning holes cooperate with the auxiliary pressure blocks to ensure precise positioning of the auxiliary contacts. The positioning columns and the main contact pressure block positioning holes cooperate with the main contact pressure blocks to ensure precise positioning of the ceramic cover assembly, thereby reliably realizing the brazing work of the ceramic cover assembly with auxiliary contacts.

[0023] 2. The high-voltage contactor brazing tooling presented in the present invention is provided with downwardly recessed limit grooves at the four corners of the upper surface of the base plate, so that the brazing tooling can place four ceramic cover assemblies at a time, reducing material consumption and improving production capacity; at the same time, it reduces the cost of the tooling and the brazing processing cost.

[0024] 3. The high-voltage contactor brazing tooling presented in the present invention optimizes the tooling structure, and the support plate can be embedded in the positioning groove to fix the upper mold; the inner wall of the bottom of the positioning plate can be engaged with the outer wall of the second support block to fix the lower mold; the upper mold and the lower mold are mutually matched and positioned, and the production capacity is improved through multi-layer assembly and arrangement; multiple layers can be freely combined according to the shape and volume of the equipment; at the same time, the upper mold and the lower mold can be quickly stacked by self-positioning, which improves work efficiency, is stably placed, and greatly reduces the brazing processing cost.

[0025] 4. The high-voltage contactor brazing tool demonstrated by the present invention is provided with a lower exhaust groove at the bottom of the support plate; an auxiliary contact pressure block positioning hole is provided in the lower exhaust groove and passes through it from top to bottom; an upper exhaust groove is provided between the first support block, the second support block and the third support block; a main contact pressure block positioning hole is provided in the upper exhaust groove between adjacent second support blocks and third support blocks and passes through it downward; a main contact pressure block positioning hole is provided in the upper exhaust groove between adjacent third support blocks and the first support block; a second air vent is provided at the center of the first support block, and a second air vent is provided at the center position of the two main contact pressure block positioning holes at one end of the support plate in the length direction; a first air vent is provided at the center of the bottom plate of the lower mold; the first air vent and the second air vent at the center of the first support block are arranged correspondingly to form a through hole passing through from top to bottom; thereby accelerating the flow of hot air flow inside the brazing tool and improving temperature balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a ceramic cover assembly in a high-voltage contactor brazing tooling of the present invention;

[0027] Figure 2 This is a front structural schematic diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling of the present invention;

[0028] Figure 3 This is a schematic top view of the structure of a ceramic cover assembly in a high-voltage contactor brazing tooling of the present invention;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA;

[0030] Figure 5 This is a bottom view structural diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling according to the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of a high-voltage contactor brazing tooling of the present invention;

[0032] Figure 7 This is a front view structural schematic diagram of a high-voltage contactor brazing tooling of the present invention;

[0033] Figure 8 This is a left-side structural schematic diagram of a high-voltage contactor brazing tooling according to the present invention;

[0034] Figure 9 This is a schematic top view of the structure of a high-voltage contactor brazing tooling of the present invention;

[0035] Figure 10 This is a bottom view structural diagram of a high-voltage contactor brazing tooling according to the present invention;

[0036] Figure 11 This is a schematic diagram of the three-dimensional structure of an upper mold, a lower mold and a ceramic cover assembly in a high-voltage contactor brazing tooling of the present invention;

[0037] Figure 12 This is a schematic diagram of the three-dimensional structure of a lower mold in a high-voltage contactor brazing tooling of the present invention;

[0038] Figure 13 This is a schematic diagram of the three-dimensional structure of a main contact pressing block in a high-voltage contactor brazing tooling of the present invention;

[0039] Figure 14 The figure is a schematic diagram of the three-dimensional structure of an auxiliary pressing block in a high-voltage contactor brazing tooling of the present invention.

[0040] In the figure: 1. Ceramic cover assembly; 11. Main contact; 12. Ceramic cover; 13. Auxiliary contact; 14. Yoke iron plate; 15. Top plate; 16. Auxiliary round welding piece; 17. Transition piece; 18. Square welding piece; 19. Round welding piece; 2. Lower mold; 21. Positioning plate; 211. Positioning groove; 22. First air vent; 23. Bottom plate; 24. Limiting groove; 25. Positioning column; 26. Positioning block; 27. Auxiliary contact positioning hole; 3. Upper mold; 31. Upper exhaust groove; 32. Auxiliary contact pressure block positioning hole; 33. Lower exhaust groove; 34. Main contact pressure block positioning hole; 35. Second air vent; 36. First support block; 37. Support plate; 38. Second support block; 39. Third support block; 4. Main contact pressure block; 41. Through hole; 5. Auxiliary pressure block; 51. Round hole. DETAILED DESCRIPTION

[0041] First of all, it should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position. Example 1

[0042] A ceramic cover assembly 1, such as Figure 1-Figure 5 As shown, it includes a main contact 11, a ceramic cover 12, an auxiliary contact 13 and a yoke plate 14; a yoke plate 14 is installed at the bottom of the ceramic cover 12, and a top plate 15 is provided on the top thereof, and main contacts 11 are provided on the outer walls at both ends of the length direction of the top plate 15, and a square welding piece 18 is installed between the main contact 11 and the top plate 15; an auxiliary contact 13 is installed between the two main contacts 11, and a transition piece 17 is installed between the end of the auxiliary contact 13 away from the yoke plate 14 and the top plate 15, and the transition piece 17 is fitted on the auxiliary contact 13, and an auxiliary circular welding piece 16 is fixedly installed on the side of the transition piece 17 away from the top plate 15; a circular welding piece 19 is installed between the ceramic cover 12 and the yoke plate 14.

[0043] A high voltage contactor brazing tool is used for brazing the ceramic cover assembly 1, such as Figure 6-Figure 12 As shown, it includes an upper mold 3, a lower mold 2, a main contact pressing block 4 and an auxiliary pressing block 5. The upper mold 3 is installed above the lower mold 2; the main contact pressing block 4 is installed above the upper mold 3 to fix the main contact 11 in the ceramic cover assembly 1; the auxiliary pressing block 5 is installed above the upper mold 3 to fix the auxiliary contact 13 in the ceramic cover assembly 1.

[0044] The upper mold 3 includes a support plate 37, which is arranged at the bottom of the upper mold 3. A lower exhaust groove 33 is provided at the bottom of the support plate 37; an auxiliary contact pressure block positioning hole 32 is provided in the lower exhaust groove 33 and passes through the lower and upper parts, and the auxiliary contact pressure block positioning hole 32 is used to fix the auxiliary pressure block 5; a first support block 36, a second support block 38 and a third support block 39 are fixedly installed on the upper surface of the support plate 37; the first support block 36 is fixedly installed in the middle of the length direction of the support plate 37; the second support block 38 is fixedly installed at the four corners of the support plate 37; the third support block 39 is fixedly installed between the first support block 36 and the second support block 38; the third support block 39 is fixedly installed with the first support block 36 and the second support block 38; The lower exhaust groove 33 is arranged accordingly; an upper exhaust groove 31 is arranged between the first support block 36, the second support block 38 and the third support block 39; four second support blocks 38 and four third support blocks 39 are each provided; a main contact pressure block positioning hole 34 passing downward is provided in the upper exhaust groove 31 between the adjacent second support block 38 and the third support block 39; a main contact pressure block positioning hole 34 passing downward is provided in the upper exhaust groove 31 between the adjacent third support block 39 and the first support block 36, for fixing the main contact pressure block 4; a second air vent 35 is provided at the center of the first support block 36, and a second air vent 35 is provided at the center position of the two main contact pressure block positioning holes 34 at one end of the support plate 37 in the length direction.

[0045] The lower mold 2 includes a base plate 23, and positioning plates 21 are fixedly installed at the four corners of the base plate 23. A positioning groove 211 is provided on the top of the positioning plate 21, and the bottom of the positioning plate 21 extends to the bottom of the base plate 23; a first air vent 22 is provided at the center of the base plate 23; downwardly concave limiting grooves 24 are provided at the four corners of the upper surface of the base plate 23, and a positioning block 26 is fixedly installed at the center position of the limiting groove 24, and an auxiliary contact positioning hole 27 is provided on the top of the positioning block 26; a plurality of positioning columns 25 are fixedly installed on the upper surface of the limiting groove 24, and the positioning columns 25 are symmetrically distributed with respect to the cross-section of the width direction of the positioning block 26.

[0046] As a preferred solution of the present invention, the support plate 37 can be embedded in the positioning groove 211 to fix the upper mold 3.

[0047] As a preferred solution of the present invention, the inner wall of the bottom of the positioning plate 21 can be engaged with the outer wall of the second supporting block 38 to fix the lower mold 2.

[0048] As a preferred solution of the present invention, the first air hole 22 is provided corresponding to the second air hole 35 at the center of the first support block 36 to form a through hole that penetrates from top to bottom.

[0049] As a preferred solution of the present invention, an auxiliary pressure block 5 is installed in the auxiliary contact pressure block positioning hole 32, and a circular hole 51 is provided at the bottom of the auxiliary pressure block 5. The auxiliary contact 13 in the ceramic cover assembly 1 is inserted into the circular hole 51 to ensure the position accuracy of the auxiliary contact 13.

[0050] As a preferred solution of the present invention, the main contact pressure block 4 is installed in the main contact pressure block positioning hole 34, and the main contact pressure block 4 is provided with a through hole 41 in the axial direction. The main contact 11 in the ceramic cover assembly 1 is inserted into the through hole 41, thereby preventing the main contact 11 from shifting at high temperature.

[0051] As a preferred solution of the present invention, the upper mold 3 and the lower mold 2 are made of a new graphene material that is resistant to high temperatures and has a low thermal expansion coefficient, and is dimensionally stable and does not deform.

[0052] As a preferred solution of the present invention, the positioning block 26 and the positioning column 25 are processed from a precision alloy having a thermal expansion coefficient similar to that of the ceramic cover 12, and have good dimensional matching with the ceramic assembly at high temperatures, greatly reducing brazing stress and improving quality.

[0053] As a preferred solution of the present invention, the main contact pressing block 4 and the auxiliary contact pressing block 13 are made of high-temperature resistant stainless steel.

[0054] As a preferred solution of the present invention, the upper mold 3 and the lower mold 2 are assembled and arranged in multiple layers.

[0055] The technical principle of the present invention is that: by setting the auxiliary contact pressure block positioning hole 32, the main contact pressure block positioning hole 34, the positioning block 26 and the positioning column 25, the auxiliary contact positioning hole 27 on the positioning block 26 and the auxiliary contact pressure block positioning hole 32 cooperate with the auxiliary pressure block 5 to ensure the precise positioning of the auxiliary contact 13; the positioning column 25 and the main contact pressure block positioning hole 34 cooperate with the main contact pressure block 4 to ensure the precise positioning of the ceramic cover assembly 1, and reliably realize the brazing work of the ceramic cover assembly 1 with the auxiliary contact 13; optimize the tooling structure, the upper mold 3 and the lower mold 2 achieve mutual positioning, and improve the production capacity through multi-layer assembly arrangement; the multiple layers can be freely combined according to the shape and volume of the equipment; at the same time, the upper mold 3 and the lower mold 2 can be quickly stacked by self-positioning, which improves work efficiency and is placed stably, greatly reducing the brazing processing cost. According to the volume and size of the vacuum brazing furnace, a small vacuum furnace can be placed with 5 layers, and a large vacuum furnace can be placed with more than 10 layers.

[0056] At the same time, a lower exhaust groove 33 is provided at the bottom of the support plate 37; an auxiliary contact pressure block positioning hole 32 is provided in the lower exhaust groove 33 and runs through it from top to bottom; an upper exhaust groove 31 is provided between the first support block 36, the second support block 38 and the third support block 39; a main contact pressure block positioning hole 34 is provided in the upper exhaust groove 31 between the adjacent second support block 38 and the third support block 39; a main contact pressure block positioning hole 34 is provided in the upper exhaust groove 31 between the adjacent third support block 39 and the first support block 36 and a main contact pressure block positioning hole 34 is provided in the upper exhaust groove 31 between the adjacent third support block 39 and the first support block 36. The main contact pressure block positioning hole 34 is provided at the center of the first support block 36; a second air hole 35 is provided at the center of the two main contact pressure block positioning holes 34 at one end of the support plate 37 in the length direction; a first air hole 22 is provided at the center of the bottom plate 23 of the lower mold 2; the first air hole 22 and the second air hole 35 at the center of the first support block 36 are provided in correspondence to form a through hole running through from top to bottom; thereby accelerating the flow of hot air flow inside the brazing tooling and improving the temperature balance.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage contactor brazing tool for brazing a ceramic cover assembly (1), comprising an upper mold (3), a lower mold (2), a main contact pressing block (4) and an auxiliary pressing block (5), wherein the ceramic cover assembly (1) comprises a main contact (11), a ceramic cover (12), an auxiliary contact (13) and a yoke iron plate (14); a yoke iron plate (14) is installed at the bottom of the ceramic cover (12), a top plate (15) is provided on the top thereof, and main contacts (11) are provided on the outer walls of both ends of the top plate (15) in the longitudinal direction; an auxiliary contact (13) is installed between two main contacts (11); It is characterized by: The upper mold (3) is mounted above the lower mold (2); the main contact pressing block (4) is mounted above the upper mold (3) to fix the main contact (11) in the ceramic cover assembly (1); the auxiliary pressing block (5) is mounted above the upper mold (3) to fix the auxiliary contact (13) in the ceramic cover assembly (1); The upper mold (3) includes a support plate (37), the support plate (37) is arranged at the bottom of the upper mold (3), and a lower exhaust groove (33) is provided at the bottom of the support plate (37); an auxiliary contact pressure block positioning hole (32) is provided in the lower exhaust groove (33) and passes through the lower and upper parts; a first support block (36), a second support block (38) and a third support block (39) are fixedly installed on the upper surface of the support plate (37); the first support block (36) is fixedly installed in the middle of the length direction of the support plate (37); the second support block (38) is fixedly installed at the four corners of the support plate (37); the third support block (39) is fixedly installed on the first support block (36) and the second support block (38); the third support block (39) is arranged corresponding to the lower exhaust groove (33); an upper exhaust groove (31) is provided between the first support block (36), the second support block (38) and the third support block (39); the second support block (38) and the third support block (39) are each provided with four; a main contact pressure block positioning hole (34) penetrating downward is provided in the upper exhaust groove (31) between the adjacent second support block (38) and the third support block (39); a main contact pressure block positioning hole (34) penetrating downward is provided in the upper exhaust groove (31) between the adjacent third support block (39) and the first support block (36); A second air vent (35) is provided at the center of the first support block (36), and a second air vent (35) is provided at the center of the two main contact pressure block positioning holes (34) at one end of the support plate (37) in the longitudinal direction; the lower mold (2) includes a bottom plate (23), and a first air vent (22) is provided at the center of the bottom plate (23); the first air vent (22) and the second air vent (35) at the center of the first support block (36) are provided correspondingly to form a through hole that passes through from top to bottom.

2. A high-voltage contactor brazing tool according to claim 1, characterized in that: Positioning plates (21) are fixedly installed at the four corners of the bottom plate (23), a positioning groove (211) is provided on the top of the positioning plate (21), and the bottom of the positioning plate (21) extends to the bottom of the bottom plate (23); downwardly concave limiting grooves (24) are provided at the four corners of the upper surface of the bottom plate (23), a positioning block (26) is fixedly installed at the center position of the limiting groove (24), and an auxiliary contact positioning hole (27) is provided on the top of the positioning block (26); a plurality of positioning columns (25) are fixedly installed on the upper surface of the limiting groove (24), and the positioning columns (25) are symmetrically distributed with respect to the cross section of the width direction of the positioning block (26).

3. A high-voltage contactor brazing tool according to claim 2, characterized in that: The support plate (37) can be embedded in the positioning groove (211) to fix the upper mold (3).

4. The high-voltage contactor brazing tool according to claim 2, characterized in that: The inner wall of the bottom of the positioning plate (21) can be engaged with the outer wall of the second support block (38) to fix the lower mold (2).

5. The high-voltage contactor brazing tool according to claim 1, characterized in that: An auxiliary pressing block (5) is installed in the auxiliary contact pressing block positioning hole (32), a circular hole (51) is provided at the bottom of the auxiliary pressing block (5), and the auxiliary contact (13) in the ceramic cover assembly (1) is inserted into the circular hole (51) to ensure the position accuracy of the auxiliary contact (13).

6. The high-voltage contactor brazing tool according to claim 1, characterized in that: The main contact pressing block (4) is installed in the main contact pressing block positioning hole (34), and a through hole (41) is provided in the axial direction of the main contact pressing block (4). The main contact (11) in the ceramic cover assembly (1) is inserted into the through hole (41), thereby preventing the main contact (11) from deflecting at high temperature.

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