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CN-117415409-B - Welding device and welding method for multi-component contact assembly

CN117415409BCN 117415409 BCN117415409 BCN 117415409BCN-117415409-B

Abstract

The invention belongs to the technical field of welding of contact assemblies, and particularly relates to a welding device and a welding method of a multi-component contact assembly. The welding device comprises a welding support tool, a welding pressure head tool and induction brazing equipment, wherein the welding support tool comprises a base, a support ceramic rod, a first limiting ceramic rod and an arc striking piece supporting rod are fixed on the base, the welding pressure head tool comprises an upper supporting frame, a first upper pressure rod and a second upper pressure rod are fixed at the lower end of the upper supporting frame, and the induction brazing equipment comprises an induction coil, and the induction coil is arranged around a welding part of a multi-component contact assembly. The welding device with a special structure is adopted, so that the welding of a plurality of parts can be realized simultaneously, the influence of the subsequent welding spot welding on the strength of the previous welding spot during step-by-step welding is solved, and the welding quality and the welding efficiency are improved. The welding process can be used for welding, can be used for mass stable production, and has the advantages of convenient operation, low cost, high welding efficiency and good welding quality consistency.

Inventors

  • LI XIAOFEI
  • LI XIANG
  • WANG XINMIN
  • WANG GENHU
  • YANG MING
  • YAO YONGFENG
  • ZHANG SHANRONG

Assignees

  • 浙江福达合金材料科技有限公司

Dates

Publication Date
20260512
Application Date
20231108

Claims (9)

  1. 1.A welding device of a multi-component contact assembly, which comprises two striking plates (1), a bracket (2) and two contacts (3); The support (2) is provided with an upper end welding plane (202) and side welding inclined planes (201) which are positioned on two sides of the upper end welding plane (202) along a second direction and form obtuse angles with the plane of the upper end welding plane (202), the two contacts (3) are welded on two sides of the upper end welding plane (202) along the second direction, the arc striking sheet (1) comprises a bottom support plate (101) and a welding connecting plate (102), the welding connecting plate (102) is welded on the surface of the side welding inclined planes (201), and a certain included angle is formed between the bottom support plate (101) and the welding connecting plate (102); The welding device is characterized by comprising: the welding support tool comprises a base (4), wherein a support ceramic rod (5), a first limit ceramic rod (6) and an arc striking piece support rod (8) are fixed on the base (4); Wherein, the support ceramic rod (5) is used for supporting the bottom of the bracket (2); The first limiting ceramic rods (6) are provided with two groups of first limiting ceramic rods (6) which are respectively positioned at two sides of the supporting ceramic rods (5) along the first direction, the height of the first limiting ceramic rods (6) relative to the base (4) is larger than that of the supporting ceramic rods (5) relative to the base (4), the distance between the two groups of first limiting ceramic rods (6) is matched with the width of the support (2), and the first limiting ceramic rods (6) are used for limiting the two side edges of the support (2) along the first direction; the arc striking piece support rods (8) are provided with two arc striking piece support rods (8) which are respectively positioned at two sides of the support ceramic rod (5) along the second direction, and the arc striking piece support rods (8) are used for supporting the bottom of the bottom support plate (101); the welding press head tool comprises an upper support frame (13), wherein a first upper press rod (10) and a second upper press rod (11) are fixed at the lower end of the upper support frame (13); The first upper pressing rod (10) is used for forming a pressing action on the upper surface of the contact (3); the second upper pressing rod (11) is provided with a pressing inclined surface (1101) corresponding to the side welding inclined surface (201), and the second upper pressing rod (11) is used for forming a pressing action on the upper surface of the welding connection plate (102) through the pressing inclined surface (1101); The welding press head tool and the welding support tool are arranged up and down, and the welding press head tool can move up and down relative to the welding support tool; The induction brazing device comprises an induction coil (9), wherein the induction coil (9) is arranged around a welding part of the multi-component contact assembly.
  2. 2. The welding device for the multi-component contact assembly according to claim 1, wherein the outer end of the bottom support plate (101) is provided with two bevel edges (1011), two second limiting ceramic rods (7) are fixed on one arc striking piece support rod (8), the upper end faces of the second limiting ceramic rods (7) are protruded relative to the upper end faces of the arc striking piece support rod (8), and the second limiting ceramic rods (7) are used for limiting the two bevel edges (1011) of the bottom support plate (101).
  3. 3. The welding device for the multi-component contact assembly according to claim 2, wherein the arc striking piece supporting rod (8) is provided with a limiting hole groove for a second limiting ceramic rod (7) to extend in, and the second limiting ceramic rod (7) is connected with the arc striking piece supporting rod (8) by being inserted into the limiting hole groove.
  4. 4. The welding device for the multi-component contact assembly according to claim 1, wherein the first upper pressing rod (10) and the second upper pressing rod (11) are connected to the upper supporting frame (13) in a sliding manner up and down, springs (12) are arranged between the first upper pressing rod (10) and the second upper pressing rod (11) and the upper supporting frame (13), and the springs (12) are used for forming downward elastic force.
  5. 5. A method of welding the multi-component contact assembly using the welding apparatus of any of claims 1-4, comprising the steps of: 1. the parts to be welded are assembled on the welding support tool, and the specific sequence is as follows: (a) Placing the bracket (2) to be welded on the supporting ceramic rod (5), fixing the position by the limiting ceramic rod (5), and confirming that the lower surface of the bracket (2) is flush with the upper surface of the supporting ceramic rod (5) during assembly, and attaching the side surface of the bracket to the first limiting ceramic rod (6); (b) Uniformly coating soldering flux on a side welding inclined plane (201) of a bracket (2), placing an arc striking sheet (1) to be welded on an arc striking sheet supporting rod (8), completely attaching a bottom supporting plate (101) to the top surface of the arc striking sheet supporting rod (8), and completely attaching a welding connecting plate (102) to the side welding inclined plane (201) of the bracket (2); (c) Uniformly coating soldering flux on a contact welding area of the bracket (2); (d) Placing silver-based solder on a contact welding area of a bracket (2) coated with soldering flux; (e) Uniformly coating soldering flux on a welding surface of the contact (3), and placing the contact (3) on a contact welding area of the bracket (2); 2. The welding pressure head tool presses down the fixed arc striking piece (1) and the contact (3), and the induction brazing equipment works to weld the induction coil (9) product.
  6. 6. The welding method according to claim 5, wherein the silver-based solder is a BAg56CuZn chip, and the specification of the silver-based solder is 5mm×6mm×0.1mm.
  7. 7. The welding method according to claim 5, wherein the soldering flux is prepared by decocting silver flux and water in a volume ratio of 3:2 to form a paste.
  8. 8. The welding method according to claim 5, wherein the side end face of the contact (3) is bonded to the upper end face of the welding connection plate (102) so that the melted silver-based solder between the contact (3) and the bracket (2) penetrates between the welding connection plate (102) and the side welding inclined face (201) of the bracket (2) by capillary phenomenon.
  9. 9. The welding method according to claim 5, wherein the induction brazing apparatus is a high-precision high-frequency induction brazing apparatus having a power of 50 to 80kW.

Description

Welding device and welding method for multi-component contact assembly Technical Field The invention belongs to the technical field of welding of contact assemblies, and particularly relates to a welding device and a welding method of a multi-component contact assembly. Background The contact assembly is used as a key point contact part in the switch, and the welding quality of the contact assembly determines the service life of the switch to a great extent, so that the problem of the welding quality of the contact assembly is primarily solved. The contact assembly shown in fig. 1 is formed by welding a plurality of dissimilar material parts, and specifically comprises two arc striking pieces 1, a support 2 and two contacts 3, wherein the support 2 is provided with an upper end welding plane 202 and side welding inclined planes 201 which are positioned on two sides of the upper end welding plane 202 and form an obtuse angle with the plane on which the upper end welding plane 202 is positioned, the two contacts 3 are welded on two sides of the upper end welding plane 202, the arc striking pieces 1 comprise a bottom support plate 101 and a welding connecting plate 102, the welding connecting plate 102 is welded on the surface of the side welding inclined planes 201, and a certain included angle is formed between the bottom support plate 101 and the welding connecting plate 102. The arc striking piece 1 is made of stainless steel, the support 2 is made of copper, and the contact 3 is made of silver tin oxide. Generally, the welding between two dissimilar materials is more conventional, but for the contact assembly formed by welding a plurality of dissimilar material parts, the welding mode of the prior art is step welding at present, the welding efficiency is lower, and the strength of the former welding point is influenced by the subsequent welding point during step welding, so that the welding quality is unstable. Disclosure of Invention The invention aims to overcome the defects and shortcomings in the prior art and provides a welding device and a welding method for a multi-component contact assembly. The technical scheme adopted by the invention is that the welding device of the multi-component contact assembly comprises two striking plates, a bracket and two contacts; the arc striking sheet comprises a bottom support plate and a welding connecting plate, the welding connecting plate is welded on the surface of the side welding inclined surface, and a certain included angle is formed between the bottom support plate and the welding connecting plate; The welding device includes: the welding support tool comprises a base, wherein a support ceramic rod, a first limit ceramic rod and an arc striking piece support rod are fixed on the base; wherein, the support ceramic rod is used for supporting the bottom of the bracket; The first limiting ceramic rods are provided with two groups and are respectively positioned at two sides of the supporting ceramic rods along the first direction, the height of the first limiting ceramic rods relative to the base is larger than that of the supporting ceramic rods relative to the base, the distance between the two groups of first limiting ceramic rods is matched with the width of the bracket, and the first limiting ceramic rods are used for limiting the two side edges of the bracket along the first direction; The arc striking piece support rods are arranged at two sides of the support ceramic rod along the second direction and are used for supporting the bottom of the bottom support plate; The welding press head tool comprises an upper support frame, wherein a first upper press rod and a second upper press rod are fixed at the lower end of the upper support frame; The first upper pressing rod is used for forming a pressing action on the upper surface of the contact; The second upper pressing rod is provided with a pressing inclined surface corresponding to the side welding inclined surface, and is used for forming a pressing effect on the upper surface of the welding connecting plate through the pressing inclined surface; The welding press head tool and the welding support tool are arranged up and down, and the welding press head tool can move up and down relative to the welding support tool; the induction brazing device comprises an induction coil, wherein the induction coil is arranged around a welding part of the multi-component contact assembly. Further, the outer end of the bottom support plate is provided with two bevel edges, one arc striking piece support rod is fixedly provided with two second limiting ceramic rods, the upper end faces of the second limiting ceramic rods are raised relative to the upper end faces of the arc striking piece support rods, and the second limiting ceramic rods are used for limiting the two bevel edges of the bottom support plate. Further, the arc striking piece supporting rod is provided with a limiting hole groove for the second limiting