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Method and device for soldering metal parts and components by adopting high-frequency induction brazing

A high-frequency induction brazing and welding method technology, applied in the direction of electric heating devices, auxiliary devices, welding media, etc., can solve the problems of weld seam corrosion, easy to reduce sealing, reduce weld strength and conductivity, etc., to prevent welding Seam corrosion, increased productivity, and shortened welding time

Active Publication Date: 2012-02-22
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a high-frequency induction brazing welding method for metal parts, which solves the existing problems in the prior art that easily reduce the sealing performance, reduce the strength and conductivity of the weld seam, absorb and absorb moisture, and cause weld seam corrosion. At the same time, it provides a method to quickly determine the welding process and equipment selection, so as to realize simultaneous welding of multiple products or one product for simultaneous welding of multiple solder spots

Method used

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  • Method and device for soldering metal parts and components by adopting high-frequency induction brazing
  • Method and device for soldering metal parts and components by adopting high-frequency induction brazing
  • Method and device for soldering metal parts and components by adopting high-frequency induction brazing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] High-frequency AC welding between dissimilar metals with different thicknesses:

[0096] Such as Figure 4 , the first weldment in embodiment 1 is a U-shaped contact bridge 15, which is an iron copper plating groove; Each end is welded with a silver contact 14;

[0097] The first is to select the device:

[0098] Select the device power, where the theoretical power is:

[0099] Power (KW) = weldment weight (Kg) × temperature (°C) × specific heat capacity {J / (kg)°C} / 3600 (seconds),

[0100] The weight of the iron copper plating tank is 0.033Kg, the weight of two silver contacts is 0.011Kg, the weight of the conductive plate is 0.021Kg, the total weight of the silver-copper assembly is 0.065Kg; the specific heat capacity of silver Ag is 234J / kg; the specific heat capacity of copper Cu is 390J / kg; the brazing temperature is selected 770-900°C, put the above parameters into the formula to calculate:

[0101] The theoretical power of the silver-copper weldment is 6.8-7....

Embodiment 2

[0138] Welding between dissimilar metals with different thicknesses (copper, iron and silver brazing):

[0139] The processing object is a contact assembly produced by a company producing AC contactors, which is an iron copper plating tank with a conductive plate welded in the middle and a silver contact welded at both ends of the iron copper plating tank surface.

[0140] According to the model of embodiment 1, the contact bridge and contact welding process and the high-frequency induction brazing results of the following AC contactors are counted: the iron copper plating grooves, silver contacts, and conductive plates of different thicknesses and specifications are substituted into The above formula calculates the high-frequency welding process parameters; in addition, the copper tube is bent into a plurality of high-frequency coils corresponding to the product with a gap of 1-2mm and matching shape.

[0141] Table 4: Comparison of basic process parameters of high-frequency ...

Embodiment 3

[0154] High-frequency brazing of AC contactor contacts

[0155] According to the above model of embodiment 1, the welding process and high-frequency induction brazing results of the contact bridge and contacts of the following AC contactors are counted:

[0156] Specification 3:

[0157] U-shaped contact bridge: silver contact 18mm×13mm×1.7mm;

[0158] T3, Y4 contact plate 18mm×55mm×18mm×5;

[0159] Brazing material Bag30CuZn sheet: 0.2mm×13mm×18mm×R15,

[0160] Flux FB303P paste, all surfaces are coated before welding;

[0161] Magnetic Ring Diameter: Pressure: 0.2Mpa; series high-frequency coil:

[0162] Welding weight of silver contact and contact plate: 0.098kg;

[0163] Theoretical required power: 8.1746-9.555KW; actual required power: 12.56-14.7KW,

[0164] Welding current 47-50A; welding time 18-23s; holding current 38-41A; holding time 50-60s;

[0165] Specification 4:

[0166] U-shaped contact bridge: silver contact 22mm×17mm×2.5mm;

[0167]T3, Y4 contact...

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Abstract

The invention discloses a method for soldering metal parts and components by adopting high-frequency induction brazing, which can complete high-frequency brazing assembly molding of multiple soldering points of multiple soldering parts in one time. The method is dependent on a device, which comprises a high-frequency coil and a magnetic ring pressure lever, wherein the high-frequency coil and the magnetic ring pressure lever are connected with a high-frequency controller respectively, and are controlled uniformly by the high-frequency controller. By utilizing the device, the method comprises the following steps of: treating the surface of a part to be soldered; assembling the soldering device, and distributing the high-frequency coil and a magnetic head pressure lever; selecting a brazing filler metal to be matched with the part to be soldered, and preparing paste brazing flux FB303P; optimally allocating positions and quantities of the brazing filler metal and the brazing flux; setting corresponding process values by means of the high-frequency controller to perform heat soldering, preserving the temperature, switching off, and cooling by using cooling water to the room temperature. According to the method, one-time soldering molding can be realized by multiple soldering of multi-process multi-point and other processes.

Description

technical field [0001] The invention belongs to the technical field of high-frequency welding, and relates to a high-frequency induction brazing welding method for metal parts, and also relates to a welding device used in the high-frequency induction brazing welding method. Background technique [0002] The existing high-frequency induction brazing welding technology for metal parts is a kind of induction welding technology (induction welding is divided into power frequency, intermediate frequency, super audio frequency, high frequency, and ultra-high frequency induction welding according to the frequency of the power supply. The basic principles of induction welding are the same. ), used in high and low voltage electrical appliances, machinery manufacturing, automobile manufacturing, power generation equipment, solar energy, power accessories, air conditioners, compressors, coolers, lamps, motors, shipbuilding, rail vehicles, aerospace, weaponry, nuclear industry, petrochemi...

Claims

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Application Information

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IPC IPC(8): B23K1/002B23K3/00B23K3/047B23K3/08B23K35/30
Inventor 黄和平黄一淼张金一
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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