CN207840468U - A kind of shock proof medicine core composite soldering cake of band spiral skeleton - Google Patents

Abstract

A flux-cored composite brazing filler disc with a spiral skeleton for impact resistance is disclosed. The filler disc is composed of narrow-strip flux-cored filler metal and narrow-strip material wound alternately to form a planar double helix shape, with a gap of ≤0.1 mm between the narrow-strip flux-cored filler metal and the narrow-strip material. The narrow-strip flux-cored filler metal includes an outer layer and a flux core filled in the outer layer. The outer layer includes a tubular structure with a spiral lap joint formed by rotating and rolling a strip of filler metal made from filler metal raw material. This invention continuously and alternately winds the narrow-strip flux-cored filler metal and narrow-strip alloy together and interlocks them into a disc shape, resulting in better rigidity and structural stability. It aims to solve the problems of complex brazing process, low production efficiency, difficulty in accurately controlling the amount of flux, and frequent occurrence of excessive or uneven flux addition during brazing.

Description

A kind of anti-impact flux-cored solder cake with helical skeleton

technical field

The utility model relates to the field of brazing, in particular to an anti-shock cored solder cake with a spiral skeleton.

Background technique

Cemented carbide is a composite material made of high hardness refractory metal compounds (such as WC, TiC, TaC, NbC, VC and TiN, etc.) and bonding metals (Co, Ni, Mo, Fe, etc.) through powder metallurgy process , with extremely high hardness, wear resistance and thermohardness, is a very important wear-resistant material in modern industry. Cemented carbide is widely used in metal cutting tools, mining, coal mining picks, mining rock drilling, oil drilling, geological exploration tools, deep drawing, extrusion, stamping dies and other industries. Because cemented carbide is relatively expensive, its plasticity and impact toughness are poor, so most of the application form of cemented carbide is to use small pieces of cemented carbide as inserts, which are attached to parts made of high-strength steel such as structural steel and tool steel. The working part; and the high-strength steel is used to bear the impact load, and save the expensive hard alloy, reducing the manufacturing cost. Commonly used methods for connecting cemented carbide and steel are: brazing method, mechanical clamping method, stress inserting method and bonding method. Brazing method is the most widely used method for firmly connecting cemented carbide and steel. It is also one of the most successful methods.

Sandwich composite solder is a new type of stress-relieving solder for high-grade precision hard alloy tools or large-area hard alloy brazing that has emerged in recent years. The core of this solder is made of pure copper, copper-manganese alloy or copper-zinc Alloy composition, external cladding silver-based solder, the volume ratio of the three most commonly used solder materials on the market is 1:2:1 respectively, during the brazing process, the core material does not melt, only the outer silver-based solder melts , the non-melting high-plastic copper alloy increases the thickness of the brazing seam, and the elastic-plastic deformation of the high-plastic copper alloy can effectively relieve the thermal stress inside the brazing joint due to the mismatch between the thermal expansion coefficients of the cemented carbide and the steel matrix during the brazing process , Reduce the residual stress and improve the bonding strength of the brazing seam, so that the crack tendency of the cemented carbide is greatly reduced. The traditional brazing process is to use sandwich composite solder and flux, and the flux is pre-coated on the workpiece before use or heating. The operation of brazing flux or pre-coating flux increases the pre-soldering process and operation time , and added another variable in the brazing process, which affected the consistency of welding and the stability of quality. In order to ensure the quality of brazing, an excessive amount of flux had to be added, resulting in waste of flux and relatively high flux residue. Difficult to clean and easy to corrode the joints; this kind of brazing process is complex, the production efficiency is low, and it is difficult to accurately control the amount of flux used. Too much or uneven flux often occurs, and the welding quality of the joints depends on the level of the operator. prone to defects. The existing sandwich composite solder and its preparation method, the composite solder has a three-layer structure, the two outer layers are silver solder, and the core is a copper alloy. The preparation method of the composite solder is three-layer laminated rolling compound, and Diffusion welding heat treatment between composite surfaces, and finally finished rolling to 0.3mm finished product; but this method has the disadvantages of complex forming process, multi-pass process, and then diffusion welding heat treatment, limited by diffusion welding heat treatment equipment, low production efficiency and low cost Relatively high.

Utility model content

The purpose of this utility model is to solve the deficiencies of the above-mentioned technical problems. Accurately control the amount of flux, and the problem of excessive or uneven addition of flux often occurs.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a kind of anti-impact drug-cored solder cake with a spiral skeleton, the solder cake is composed of narrow-band flux-cored solder and narrow-band materials wound at intervals to form a plane Double helical shape, the gap between the narrow-band flux-cored solder and the narrow-band material is ≤0.1 mm; the narrow-band flux-cored solder includes an outer layer and a flux core filled in the outer layer, the outer layer The layer comprises a tubular structure with a helical lap seam made from a rotary roll of ribbon-shaped solder made from solder stock.

Further, the cross-sections of the narrow-band flux-cored solder and the narrow-band material are both trapezoidal, and the side surfaces of the narrow-band flux-cored solder are in contact with the side surfaces of the narrow-band material, so that the cross-section of the spliced body after splicing The cross section is parallelogram.

Further, the cross-section of one end of the narrow-band flux-core solder and the narrow-band material is a semicircular groove, and the cross-section of the other end is drum-shaped, and the drum-shaped end of the narrow-band material is inserted into the One end of the semi-circular groove of the narrow-band cored solder.

Further, the thickness of the solder cake is 0.1-3 mm.

The beneficial effects of the utility model are:

The utility model provides an impact-resistant flux-cored composite solder cake with a spiral skeleton, in which the narrow-band flux-cored solder and the narrow-band alloy are wound together at continuous intervals and interlocked into a disk shape, so that the utility model The solder cake has better rigidity and structural stability, which is convenient for packaging and transportation; compared with the traditional sheet solder, the specific surface area is increased, and it is easier to reach the melting temperature under the same heat input conditions; at the same time, the solder cake The material is a flux core, and the flux core contains flux, which can realize precise and quantitative addition of flux, reduce the amount of flux used in the brazing process, and reduce environmental pollution; no additional flux is required during use, with high production efficiency and low cost , Easy to use and other advantages;

The impact-resistant cored composite solder cake with a spiral skeleton described in the utility model can be used for large-area hard alloy brazing. During the brazing process, the solder melts and fuses with some alloys of narrow-band materials, and diffuses to the base material. Realize in-situ metallurgical reaction, improve the strength of brazing seam, leave unreacted helical alloy isolation zone after welding, can greatly relieve stress, prevent cemented carbide from cracking under impact load, and greatly improve the hardness of cemented carbide tools Impact resistance.

Description of drawings

Fig. 1 is the structural representation of the narrow-band core solder of the utility model embodiment 1;

Fig. 2 is the plan view of the narrow-band cored solder of the utility model embodiment 1;

Fig. 3 is the schematic structural view of the flux-cored composite solder cake of the utility model embodiment 1;

Fig. 4 is the cross-sectional view of the flux core composite solder cake of the utility model embodiment 1;

Fig. 5 is a schematic structural view of the narrow-band flux-cored solder in Example 2 of the present utility model;

Fig. 6 is a schematic structural view of the flux-cored composite solder cake in Example 3 of the present invention;

Fig. 7 is a cross-sectional view of the flux-cored composite solder cake of Example 3 of the present invention;

Reference signs: 1, outer layer, 101, tubular structure, 102, helical structure, 103, flux, 2, flux core, 3, spiral lap joint, 4, narrow-band flux-cored solder, 5, narrow-band material , 6, solder cake.

Detailed ways

Below in conjunction with specific embodiment, the utility model is further elaborated.

Detailed ways:

An impact-resistant flux-cored composite solder cake with a helical skeleton, the solder cake is composed of a narrow-band flux-cored solder and a narrow-band material intertwined to form a plane double helix, and the gap between the narrow-band flux-cored solder and the narrow-band material Gap ≤ 0.1 mm; the narrow-band flux-cored solder includes an outer layer and a flux core filled in the outer layer, and the outer layer includes a strip-shaped solder made of brazing material raw material by rotating rolls Tubular construction with spiral lap seams.

Further, the cross-sections of the narrow-band flux-cored solder and the narrow-band material are both trapezoidal, and the side surfaces of the narrow-band flux-cored solder are in contact with the side surfaces of the narrow-band material, so that the cross-section of the spliced body after splicing The cross section is parallelogram.

Further, the cross-section of one end of the narrow-band flux-core solder and the narrow-band material is a semicircular groove, and the cross-section of the other end is drum-shaped, and the drum-shaped end of the narrow-band material is inserted into the One end of the semi-circular groove of the narrow-band cored solder.

Further, the thickness of the solder cake is 0.1-3 mm.

Example 1

An impact-resistant flux-cored solder cake with a helical skeleton, the solder cake 6 is composed of narrow-band flux-cored solder 4 and narrow-band material 5 intertwined to form a plane double helix, and the narrow-band flux-cored solder 4 and narrow-band The gap between the materials 5 is less than or equal to 0.1 mm; the narrow-band flux-cored solder 4 includes an outer layer 1 and a flux core 2 filled in the outer layer 1, and the outer layer 1 includes A tubular structure 101 with a spiral overlapping seam 3 is formed by rotating the obtained ribbon-shaped solder.

Further, the cross-sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are both trapezoidal, and the sides of the narrow-band flux-cored solder 4 and the side of the narrow-band material 5 are in contact, so that the spliced The cross-section of the splicing body is a parallelogram.

Further, the thickness of the solder cake is 0.1 mm.

Example 2

An impact-resistant flux-cored composite solder cake with a helical skeleton, the solder cake consists of narrow-band flux-cored solder 4 and narrow-band material 5 intertwined to form a plane double helix, and the narrow-band flux-cored solder 4 and narrow-band material The gap between 5 is ≤0.1 mm; the narrow-band flux-cored solder 4 also includes an ampoule core 2 and an outer layer 1, and the outer layer 1 includes a brazing wire drawn from brazing material raw materials wound on the ampoule The helical structure 102 formed on the outer periphery of the drug core 2 is filled with flux 103 in the gaps of the helical structure 102 .

Further, the cross-section of one end of the narrow-band flux-cored solder 4 and the narrow-band material 5 is a semicircular groove, and the cross-section of the other end is drum-shaped, and the drum-shaped end of the narrow-band material 5 is Insert one end of the narrow-band cored solder into 4 semicircular grooves.

Further, the thickness of the solder cake is 2mm.

Example 3

An impact-resistant flux-cored composite solder cake with a helical skeleton, the solder cake consists of narrow-band flux-cored solder 4 and narrow-band material 5 intertwined to form a plane double helix, and the narrow-band flux-cored solder 4 and narrow-band material The gap between 5 is ≤0.1 mm; the narrow-band flux-cored solder 4 includes an outer layer 1 and a flux core 2 filled in the outer layer 1, and the outer layer 1 includes A tubular structure 101 with a spiral overlapping seam 3 is made by rotating a strip of brazing material.

Further, the cross-section of one end of the narrow-band flux-cored solder 4 and the narrow-band material 5 is a semicircular groove, and the cross-section of the other end is drum-shaped, and the drum-shaped end of the narrow-band material 5 is Insert one end of the narrow-band cored solder into 4 semicircular grooves.

Further, the thickness of the solder cake is 3 mm.

The above descriptions of the disclosed embodiments are only intended to enable those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A drug-cored composite solder cake with a spiral skeleton anti-impact, characterized in that, the solder cake is formed into a plane double helix by narrow-band flux-cored solder and narrow-band material intertwined, and the narrow-band flux-cored solder The gap between the narrow-band material and the narrow-band material is ≤0.1 mm; the narrow-band flux-cored solder includes an outer layer and a flux core filled in the outer layer, and the outer layer includes a strip-shaped A tubular structure with spiral lapped seams made of rotary coils of solder. 2. The impact-resistant flux-cored solder cake with a spiral skeleton as claimed in claim 1, wherein the cross-sections of the narrow-band flux-cored solder and the narrow-band material are trapezoidal, and the narrow-band The side surfaces of the flux-core solder are connected to the side surfaces of the narrow strip material, and the cross-section of the spliced spliced body is a parallelogram. 3. The impact-resistant flux-cored composite solder cake with a spiral skeleton as claimed in claim 1, wherein the cross-sections of the narrow-band flux-cored solder and one end of the narrow-band material are semicircular The cross-section of the other end of the groove is drum-shaped, and the drum-shaped end of the narrow strip of material is inserted into one end of the semicircular groove of the narrow strip of flux-cored solder. 4 . The impact-resistant flux-cored composite solder cake with a spiral skeleton as claimed in claim 1 , wherein the thickness of the solder cake is 0.1-3 mm.