High-voltage contactor brazing tool with novel structure

Abstract

The invention discloses a high-voltage contactor brazing tool with a novel structure, which structurally comprises an upper die, a lower die, a main contact pressing block and an auxiliary pressing block, and is provided with an auxiliary contact pressing block positioning hole, a main contact pressing block positioning hole, a positioning block and a positioning column, an auxiliary contact positioning hole in the positioning block and an auxiliary contact pressing block positioning hole are matched with the auxiliary pressing block, so that accurate positioning of the auxiliary contact is ensured; the positioning column and the main contact pressing block positioning hole are matched with the main contact pressing block to guarantee accurate positioning of the ceramic cover assembly, and brazing work of the ceramic cover assembly with the auxiliary contact is reliably achieved. The tool structure is optimized, the upper die and the lower die are matched and positioned, and the productivity is improved in a multi-layer assembling and arranging mode; multiple layers can be freely combined according to the shape and the volume of equipment; and meanwhile, the upper die and the lower die can be rapidly stacked in a self-positioning mode, the working efficiency is improved, placement is stable, and the brazing machining cost is greatly reduced.

Description

Technical Field

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

[0002] With the development of the new energy industry, the requirements for high-voltage DC contactors are getting higher and higher. Electric vehicles often use high-voltage technology to achieve the purpose of fast charging. In order to improve the withstand voltage level, high-voltage DC contactors for electric vehicles generally use ceramics as arc extinguishing media. The high-temperature vacuum brazing tooling of its ceramic assembly is the key to achieving ceramic insulation.

[0003] Brazing uses a material with a lower melting point than the parent material as the brazing filler metal. The weldment and the brazing filler metal are heated together. The heating temperature is higher than the melting point of the brazing filler metal but lower than the melting point of the parent material. The brazing filler metal is melted, while the parent material remains in a solid state. The liquid brazing filler metal is filled into the gap between the solid parent materials by capillary action. The brazing filler metal interacts with each other on the surface of the parent material, such as penetration and diffusion. After the brazing filler metal cools and solidifies, the metal connection is achieved. Vacuum brazing is a brazing process performed under a vacuum environment, which is usually used for brazing operations that require a relatively high atmosphere-free state. The purpose of the vacuum brazing process is to eliminate impurities such as oxygen and water vapor in the air to avoid defects such as weld porosity and oxidation, thereby ensuring the quality of the brazed joint. It is widely used in aerospace, electronics industry, medical equipment and other fields. Vacuum brazing tooling is a device or fixture used to support, position, clamp and protect brazed parts and equipment. During the vacuum brazing process, the tooling plays a role in fixing and stabilizing the position of the workpiece, ensuring accurate assembly and brazing operations, while also providing environmental control and protection functions to ensure brazing quality and safety.

[0004] With the popularization of intelligentization and diversification in the electric vehicle industry, it is necessary to set up auxiliary contact circuits in addition to the main circuit in the high-voltage DC contactor to switch auxiliary signals at the same time. Adding auxiliary contacts to the high-voltage DC contactor makes the structure of the ceramic cover assembly more and more complicated, such as 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 arranged on the top of the ceramic cover, main contacts are arranged 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, 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 round welding piece is fixedly installed on the side of the transition piece away from the top plate; a round 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 needs to be welded with multiple brazing materials through brazing tooling and high-temperature vacuum brazing technology. 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 new type of high-voltage contactor brazing tooling to solve the above problems. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides a new structure of high-voltage contactor brazing tooling, which solves the problem that the existing vacuum brazing tooling cannot add auxiliary contacts in the high-voltage DC contactor and cannot meet the actual production and customer use needs; at the same time, the existing vacuum brazing tooling has low production efficiency and cannot meet the growing demand for high-voltage DC contactors. The many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are described in detail below.

[0009] The present invention proposes a novel structure of high-voltage contactor brazing tooling, comprising an upper mold, a lower mold, a main contact pressing block and an auxiliary pressing block, wherein 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 comprises a support plate, which is arranged at the bottom of the upper mold, and a lower exhaust groove is provided at the bottom of the support plate; an auxiliary contact pressure block positioning hole penetrating up and down is provided in the lower exhaust groove; 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 second 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 three third support blocks are provided; a main contact pressure block positioning hole penetrating downward is provided in the upper exhaust groove between the adjacent second support block and the third support block; a main contact pressure block positioning hole penetrating downward is provided in the upper exhaust groove between the adjacent third support block 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 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, 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 recessed limiting grooves are provided at the four corners on 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 supporting block to form a through hole penetrating 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 axially arranged in 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 processed by 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 prior art, the technical solution of this application has the following beneficial effects: 1. The novel structure of the high-voltage contactor brazing tooling shown in the present invention is to set 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 the 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 the precise positioning of the ceramic cover assembly, thereby reliably realizing the brazing work of the ceramic cover assembly with auxiliary contacts.

[0022] 2. The new structure of the high-voltage contactor brazing tooling shown 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 4 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.

[0023] 3. The new structure of high-voltage contactor brazing tooling demonstrated 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 upper mold; 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 and stable placement, greatly reducing the brazing processing cost.

[0024] 4. The new structure of the high-voltage contactor brazing tooling shown in the present invention is that a lower exhaust groove is provided at the bottom of the support plate; an auxiliary contact pressure block positioning hole penetrating from top to bottom is provided in the lower exhaust groove; 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 penetrating downward is provided in the upper exhaust groove between the adjacent second support block and the third support block; a main contact pressure block positioning hole penetrating downward is provided in the upper exhaust groove between the adjacent third support block 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 length direction of the support plate; a first air vent is provided at the center of the bottom plate of the lower mold; the first air vent is provided corresponding to the second air vent at the center of the first support block to form a through hole penetrating from top to bottom; thereby accelerating the flow of hot air flow inside the brazing tooling and improving the temperature balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling of a novel structure of the present invention; Figure 2 It is a front view structural schematic diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling of a novel structure of the present invention; Figure 3 It is a top view structural schematic diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling of a novel structure of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA; Figure 5 It is a bottom view structural schematic diagram of a ceramic cover assembly in a high-voltage contactor brazing tooling with a novel structure of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of a novel high-voltage contactor brazing tooling of the present invention; Figure 7 It is a front view structural schematic diagram of a novel structure of a high-voltage contactor brazing tooling of the present invention; Figure 8 It is a left-side structural schematic diagram of a novel structure of a high-voltage contactor brazing tooling of the present invention; Fig. 9 It is a top view structural schematic diagram of a novel structure of a high-voltage contactor brazing tooling of the present invention; Fig.10 It is a bottom view structural schematic diagram of a novel structure of a high-voltage contactor brazing tooling of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of an upper mold, a lower mold and a ceramic cover assembly in a high-voltage contactor brazing tooling of a new structure of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of a lower mold in a high-voltage contactor brazing tooling with a new structure of the present invention; Fig.13 It is a three-dimensional structural schematic diagram of a main contact pressing block in a high-voltage contactor brazing tooling with a novel structure of the present invention; Fig.14 The present invention is a three-dimensional structural schematic diagram of an auxiliary pressing block in a high-voltage contactor brazing tooling with a new structure.

[0026] 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

[0027] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0028] 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 arranged on the top thereof, and main contacts 11 are arranged 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 sleeved on the auxiliary contact 13, and an auxiliary round welding piece 16 is fixedly installed on the side of the transition piece 17 away from the top plate 15; a round welding piece 19 is installed between the ceramic cover 12 and the yoke plate 14.

[0029] A novel high-voltage contactor brazing tool is used for the brazing of the ceramic cover assembly 1. 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.

[0030] The upper mold 3 includes a support plate 37, which is arranged at the bottom of the upper mold 3, and a lower exhaust groove 33 is opened 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 the lower exhaust groove, 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 second support block 38 and the 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 three third support blocks 39 are arranged respectively; a main contact pressure block positioning hole 34 penetrating downward is arranged 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 arranged 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 arranged at the center of the first support block 36, and a second air vent 35 is arranged at the center position of the two main contact pressure block positioning holes 34 at one end of the length direction of the support plate 37.

[0031] The lower mold 2 includes a bottom plate 23, at the four corners of which positioning plates 21 are fixedly installed, 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; a first air vent 22 is provided at the center of the bottom plate 23; downwardly recessed 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.

[0032] 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.

[0033] 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 upper mold 3.

[0034] As a preferred solution of the present invention, the first air hole 22 is arranged corresponding to the second air hole 35 at the center of the first support block 36 to form a through hole penetrating from top to bottom.

[0035] 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 positioning accuracy of the auxiliary contact 13.

[0036] As a preferred solution of the present invention, the main contact pressing block 4 is installed in the main contact pressing block positioning hole 34, and the main contact pressing 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] As a preferred solution of the present invention, the upper mold 3 and the lower mold 2 are assembled and arranged in multiple layers.

[0041] 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 and the auxiliary contact pressure block positioning hole 32 on the positioning block 26 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 are mutually matched and positioned, and the production capacity is improved by multi-layer assembly arrangement; 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 stably placed, 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.

[0042] 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 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 and runs through downward; 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 runs through downward a main contact pressure block positioning hole 34; a second air hole 35 is provided at the center of the first support block 36, and 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 correspondingly to form a through hole penetrating from top to bottom; thereby accelerating the flow of hot air flow inside the brazing tooling and improving the temperature balance.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel high-voltage contactor brazing tooling 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); 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 arranged on the top, and main contacts (11) are arranged on the outer walls of both ends of the top plate (15) in the length direction; an auxiliary contact (13) is installed between two main contacts (11); It is characterized in that 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); and the auxiliary pressing block (5) is mounted above the upper mold (3) to fix the auxiliary contact (13) in the ceramic cover assembly (1).

2. According to the novel structure of high voltage contactor brazing tooling described in claim 1, it is characterized by: The upper mold (3) comprises 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 opened at the bottom of the support plate (37); an auxiliary contact pressure block positioning hole (32) penetrating from top to bottom is arranged in the lower exhaust groove (33); a first support block (36), a second support block (38) and a third support block (39) are fixedly mounted on the upper surface of the support plate (37); the first support block (36) is fixedly mounted in the middle of the length direction of the support plate (37); the second support block (38) is fixedly mounted at the four corners of the support plate (37); the third support block (39) is fixedly mounted on the first support block (36) and the second support block (38); the second support block (38) and the lower exhaust groove (33) are arranged correspondingly; an upper exhaust groove (31) is arranged 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 pressing block positioning hole (34) penetrating downwards is arranged in the upper exhaust groove (31) between the adjacent second support block (38) and the third support block (39); a main contact pressing block positioning hole (34) penetrating downwards is arranged in the upper exhaust groove (31) between the adjacent second support block (38) and the first support block (36).

3. According to the novel structure of high voltage contactor brazing tooling as described in claim 2, it is characterized in that: A second vent hole (35) is provided at the center of the first support block (36), and a second vent hole (35) is provided at the center of two main contact pressure block positioning holes (34) at one end in the length direction of the support plate (37).

4. A novel high-voltage contactor brazing tool according to claim 3, characterized in that: The lower mold (2) comprises a bottom plate (23), wherein positioning plates (21) are fixedly mounted at the four corners of the bottom plate (23), a positioning groove (211) is arranged at the top of the positioning plate (21), and the bottom of the positioning plate (21) extends to below the bottom plate (23); downwardly recessed limiting grooves (24) are arranged at the four corners of the upper surface of the bottom plate (23), a positioning block (26) is fixedly mounted at the center position of the limiting groove (24), and an auxiliary contact positioning hole (27) is arranged at the top of the positioning block (26); and a plurality of positioning columns (25) are fixedly mounted on the upper surface of the limiting groove (24), and the positioning columns (25) are symmetrically distributed with respect to a cross section of the width direction of the positioning block (26).

5. A novel high-voltage contactor brazing tool according to claim 4, characterized in that: A first air hole (22) is provided at the center of the bottom plate (23).

6. A novel high voltage contactor brazing tool according to claim 4, characterized in that: The support plate (37) can be embedded in the positioning groove (211) to fix the upper mold (3).

7. A novel high voltage contactor brazing tool according to claim 4, characterized in that: 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 upper mold (3).

8. A high voltage contactor brazing tool of a novel structure according to claim 5, characterized in that: The first air hole (22) is arranged corresponding to the second air hole (35) at the center of the first support block (36), forming a through hole that penetrates from top to bottom.

9. A novel high voltage contactor brazing tool according to claim 2, 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).

10. A novel high voltage contactor brazing tool according to claim 2, characterized in that: A main contact pressing block (4) is installed in the main contact pressing block positioning hole (34), a through hole (41) is provided in the axial direction of the main contact pressing block (4), and 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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