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Lead-free high-frequency brazing method for deformed zinc alloy grafting structure

A plug-in structure and high-frequency brazing technology, which is applied to welding media, welding equipment, metal processing equipment, etc., can solve the problems that restrict the promotion and application of zinc-substituting copper products, the existence of pores and cracks, and the overall structure is easy to loosen, etc., to achieve High industrial utilization value, short liquefaction process, and the effect of improving labor conditions

Inactive Publication Date: 2015-01-07
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, low-temperature soft soldering is generally used for zinc alloy brazing at home and abroad. The solder is mainly eutectic tin-lead solder or cadmium-zinc solder. The welding fume contains harmful metals such as lead and cadmium, which are highly toxic and cannot be used in product manufacturing. mass promotion
The existing deformed zinc alloy products mostly adopt riveting process, the riveting strength is not good, and the overall structure is easy to loose. At the same time, due to the burrs on the wall of the riveting hole, there are pores and cracks on the punched surface during the self-punching process. Defects, these defects cannot meet the requirements of subsequent decoration and functional electroplating of products, which seriously restricts the popularization and application of zinc instead of copper products

Method used

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  • Lead-free high-frequency brazing method for deformed zinc alloy grafting structure
  • Lead-free high-frequency brazing method for deformed zinc alloy grafting structure
  • Lead-free high-frequency brazing method for deformed zinc alloy grafting structure

Examples

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Effect test

Embodiment 1

[0024] Example 1, such as figure 1 As shown, the deformed zinc alloy plug-in structure includes a zinc alloy plate 1 and a zinc alloy rod 2 inserted on the zinc alloy plate 1 . Such as figure 2 As shown, this embodiment is a lead-free high-frequency brazing process for deformed zinc alloy products with a rod-plate plug-in structure. The zinc alloy rods (φ3mm) and plates (80×6×12mm) are made of deformed zinc alloy (Zn-Al system). A. Pre-welding assembly process, including inspection process, first inspect the external dimensions of zinc alloy plate 1 and zinc alloy rod 2, focusing on the size of the hole on the zinc alloy plate; B. Pre-assembly process: use 280# for brazing parts Grinding with sandpaper, and then cleaning with acetone, the treated surface shall not be re-oxidized or re-contaminated; C. Assembly process: insert the zinc alloy rod into the hole of the zinc alloy plate, and insert it to the bottom without any inclination, and then insert the φ0. The 8mm Sn96.5...

Embodiment 2

[0026] Example 2, such as image 3 As shown, this embodiment is a lead-free high-frequency brazing process for deformed zinc alloy products with a rod-plate plug-in structure. The rods (φ3mm) and plates (120×6×12mm) are made of deformed zinc alloy (Zn-Al system). A. Pre-welding assembly process, including inspection process, first inspect the external dimensions of the zinc alloy plate and rod, focusing on the size of the hole on the zinc alloy plate; B. Pre-assembly process: sand the brazed part, and then use acetone Cleaning, the treated surface shall not be re-oxidized or soiled; C. Assembly process: insert the zinc alloy rod into the hole, and insert it to the bottom without any inclination, and then insert the φ1.0mm Sn96.5Ag3.0Cu0.5 solder ring Set it on the part to be soldered, and apply YH-816 environment-friendly water-soluble flux (flux: manufacturer Ningbo Xihan Tin Solder Co., Ltd., batch number 2010-9-2) to the brazing seam; D. Welding process: use 60KW high fre...

Embodiment 3

[0028] Example 3, such as Figure 4 As shown, this embodiment is a lead-free high-frequency brazing process for deformed zinc alloy products with a rod-plate plug-in structure. The rods (φ3mm) and plates (150×6×12mm) are made of deformed zinc alloy (Zn-Al system). A. Pre-welding assembly process, including inspection process, first inspect the external dimensions of the zinc alloy plate and rod, focusing on the size of the hole on the zinc alloy plate; B. Pre-assembly process: sand the brazed part, and then use acetone Cleaning, the treated surface shall not be re-oxidized or soiled; C. Assembly process: insert the zinc alloy rod into the hole, and insert it to the bottom without any inclination, and then set the φ1.2mm Sn99Ag0.3Cu0.7 solder ring on the The part to be welded, and apply YH-816 environment-friendly water-soluble flux (flux: manufacturer Ningbo Xihan Tin Solder Co., Ltd., batch number 2010-9-2) to the brazing seam; D. Welding process: use 60KW high Frequency in...

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Abstract

The invention discloses a lead-free high-frequency brazing method for a deformed zinc alloy grafting structure. The lead-free high-frequency brazing method is characterized by comprising the following steps of: a, inspection process: inspecting a weldment and a brazing filler metal; b, treatment process before assembling: using abrasive paper to grind a brazing part, and using acetone to clean the brazing part; c, assembling process: inserting a zinc alloy bar in an inserting hole, keeping the zinc alloy bar in an upright state and inserting the zinc alloy bar to the bottom, annularly sleeving the the brazing filler metal at a part to be brazed, and coating a brazing flux at a brazing seam; d, high-frequency sensing brazing process: adjusting specification parameters according to the type of a brazing machine to weld; and e, treatment process after brazing: timely using clear water to clean residuals at the brazing seam. Compared with the existing technology, the lead-free high-frequency brazing method has the advantages that: the lead-free brazing filler metal is used so that the working condition is greatly improved, the lead-free high-frequency brazing of the deformed zinc alloy is achieved by the the steps of assembling before brazing, the adjustment of the high-frequency sensing brazing process parameters and the treatment after brazing, the obtained brazing seam is full and smooth, and the connection strength is improved.

Description

technical field [0001] The invention relates to a brazing method for deformed zinc alloy, which belongs to the technical field of welding. Background technique [0002] Zinc alloys, especially wrought zinc alloys, have excellent comprehensive properties and become ideal substitutes for copper alloys in some fields, and have broad application prospects in cluster industries such as electronic communications, sanitary ware, hardware construction, electromechanical, and clothing. Welding technology is an indispensable and important content in the market application of wrought zinc alloys, especially as a substitute material in the downstream related industries of copper alloys such as sanitary ware, hardware, home appliances and other industries, and thus has become a key technical problem to be solved urgently for wrought zinc alloys one. [0003] The main components of wrought zinc alloys are Zn, Al, Cu, Mg, etc. Among them, Zn has a low melting point and boiling point (boil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/002B23K1/19B23K35/26B23K103/08
Inventor 甄立玲马冰樊建勋刘红伟刘江萍丁海燕石磊张立君
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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