CN215468659U

CN215468659U - Rapid heating welding nozzle based on hot-press welding technology

Info

Publication number: CN215468659U
Application number: CN202122063096.4U
Authority: CN
Inventors: 黄规
Original assignee: Shenzhen Maiwei Robot Co ltd
Current assignee: Shenzhen Maiwei Robot Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-11
Anticipated expiration: 2031-08-30

Abstract

The utility model provides a rapid heating welding nozzle based on a hot-press welding technology, which comprises a head part made of high-resistance metal and an electrode connecting part, wherein the head part comprises a front end and a rear end; the axis position of the front end is outwards protruded to form a structure with high axis and low periphery; the outer surface of the head is covered with an iron-based alloy layer; the titanium-molybdenum alloy with high resistance is used as the head of the welding tip, the effect of rapid temperature rise after electrification is achieved by cladding iron or friction welding iron on the surface of the titanium-molybdenum alloy, and the slow heat conduction mode in the prior art is replaced, so that the rapid temperature rise of the welding tip is realized; simultaneously, the effect of tin adhesion is realized by covering iron on the surface, so that the melted tin can flow to the bonding pad along the iron surface, and the tin-tin soldering.

Description

Rapid heating welding nozzle based on hot-press welding technology

Technical Field

The utility model relates to the technical field of welding equipment parts, in particular to a rapid heating welding tip based on a hot-press welding technology.

Background

The tin soldering machine is an automatic tin soldering welding device, and mainly completes tin soldering operation by using the motion function of a manipulator; the core part of the automatic soldering machine is a soldering system; the tin soldering system mainly comprises an automatic tin feeding mechanism, a temperature control heating body and a soldering bit; at present, a hot-press welder on the market does not have the function of sending tin by using a hot-press head, and most of the hot-press welders still use the characteristic that the hot-press head is not stained with tin in the welding process to melt the existing tin paste on a PCB bonding pad so as to achieve the purpose of welding. The soldering process has the characteristics that the solder quantity on the PCB pad is small, the soldering point is not full, and the possibility of copper exposure exists. This obviously does not meet the requirements of high precision and high quality product processes.

Among the prior art, the hot press welding machine intensifies soon, but does not use the hot pressing head to send the function of tin, because the hot pressing head has the characteristics of non-staining tin, can only weld through the tin cream that sets up in advance on the pad, and soldering tin machine can send tin, but its heating effect is slow, so need a new welding nozzle structure urgently, can reach the effect of sending tin and some tin when realizing rapid heating.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the rapid heating welding tip based on the hot-press welding technology, the head of the welding tip is made of the titanium-molybdenum alloy with high resistance, the effect of rapid heating after electrification is achieved, the slow heat conduction mode in the prior art is replaced, and the rapid heating of the welding tip is realized; simultaneously, the effect of tin adhesion is realized by covering iron on the surface, so that the melted tin can flow to the bonding pad along the iron surface, and the tin-tin soldering.

In order to achieve the purpose, the utility model provides a rapid heating welding tip based on a hot-press welding technology, which comprises a head part made of high-resistance metal and an electrode connecting part, wherein the head part comprises a front end and a rear end; the axle center of the front end protrudes outwards to form an axle center high and periphery low structure; the outer surface of the head is covered with an iron-based alloy layer.

Specifically, the iron-based alloy layer is alloy cast iron.

Preferably, the positive electrode connecting part is a positive electrode connecting column, the negative electrode connecting part is a negative electrode connecting column, the positive electrode connecting column and the negative electrode connecting column are fixedly connected with the rear end of the head part, and the other end of the positive electrode connecting column and the other end of the negative electrode connecting column are respectively connected to the positive electrode and the negative electrode of the power supply.

Preferably, the positive connecting column and the negative connecting column are integrally processed and formed by adopting metal copper.

Specifically, the head is a titanium-molybdenum alloy head.

Specifically, the front end is in a cone structure or a pyramid structure.

Preferably, the top of the front end is provided with a welding platform to form a circular truncated cone structure or a prismatic truncated cone structure of the head.

Preferably, the side wall of the front end close to the welding platform is provided with an inclined platform, and the inclined platform is connected with the welding platform.

Preferably, the iron-based alloy layer is clad or friction welded to the outer surface of the head.

The utility model has the beneficial effects that: compared with the prior art, the rapid heating welding nozzle based on the hot-press welding technology comprises a head part made of high-resistance metal and an electrode connecting part, wherein the head part comprises a front end and a rear end; the axis position of the front end is outwards protruded to form a structure with high axis and low periphery; the outer surface of the head is covered with an iron-based alloy layer; the titanium molybdenum alloy with high resistance is arranged as the head of the welding tip, so that the effect of rapid temperature rise after electrification is achieved, the slow heat conduction mode in the prior art is replaced, and the rapid temperature rise of the welding tip is realized; simultaneously, the effect of tin adhesion is realized by covering iron on the surface, so that the melted tin can flow to the bonding pad along the iron surface, and the tin-tin soldering.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a cross-sectional view of the interior of the head of the present invention;

FIG. 4 is a state diagram of the present invention in use;

FIG. 5 is a front view of the head cone structure of the present invention;

fig. 6 is a three-dimensional view of the head cone structure of the present invention.

The main element symbols are as follows:

1. an electrode connecting portion; 11. a positive connecting column; 12. a negative connecting column; 2. a head portion; 21. a front end; 211. an iron-based alloy layer; 212. tilting the platform; 213. welding a platform; 22. a back end.

Detailed Description

In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.

To overcome the defects and shortcomings in the prior art, the present invention specifically provides a rapid temperature-rising welding tip based on the thermocompression bonding technology, please refer to fig. 1-6, which includes: the electrode comprises a head part 2 and an electrode connecting part 1 which are made of high-resistance metal, wherein the head part 2 comprises a front end 21 and a rear end 22, the electrode connecting part 1 comprises a positive electrode connecting part and a negative electrode connecting part, and the positive electrode connecting part and the negative electrode connecting part are both connected with the rear end 22; the axle center of the front end 21 is protruded outwards to form an axle center high and periphery low structure; the outer surface of the head 2 is covered with an iron-based alloy layer 211; the head 2 is heated by using the huge joule heat generated when the hot-press welding pulse current flows through the material with high resistance of the head 2, and the iron-based alloy is coated on the surface of the head 2, so that the iron-based alloy reaches the same temperature as the head 2, the PCB bonding pad can be heated and the tin wire is melted at the same time, and the effects of high soldering speed and full welding are achieved.

In the present embodiment, mention is made of: the iron-based alloy layer 211 is covered on the outer surface of the head part 2 through friction welding; friction welding, which is a method for welding by using heat generated by friction of a contact surface of a workpiece as a heat source to enable the workpiece to generate plastic deformation under the action of pressure; under the action of pressure, under the action of constant or increasing pressure and torque, the relative motion between welding contact end surfaces is utilized to generate friction heat and plastic deformation heat on a friction surface and a nearby area thereof, so that the temperature of the nearby area thereof is increased to a temperature range close to but generally lower than a melting point, the deformation resistance of a material is reduced, the plasticity is improved, an oxide film of an interface is crushed, under the action of top forging pressure, the material generates plastic deformation and flow, and the welding is realized through the molecular diffusion and recrystallization of the interface; the welding mode can lead the head part 2 and the iron-based alloy to be tightly connected together without a connecting seam, thereby achieving the best heat conduction effect; the cladding specifically adopts a laser cladding technology, and the head 2 and the iron-based alloy can be tightly connected together without a connecting seam, so that the optimal heat conduction effect is achieved.

In a preferred embodiment, mention is made of: the iron-based alloy layer 211 is alloy cast iron; the alloy cast iron has the characteristic of non-stick tin, and meanwhile, the heat conduction effect is good, so that the tin can be melted by the conducted heat when the tin contacts the surface of the alloy cast iron, and at the moment, due to the tin-sticking characteristic of the alloy cast iron, the tin can flow to the axle center high point along the surface of the head part 2 and then drops on the welding disc, so that spot welding is realized

In the present embodiment, mention is made of: the positive connecting part is a positive connecting column 11, the negative connecting part is a negative connecting column 12, the positive connecting column 11 and the negative connecting column 12 are fixedly connected with the rear end 22 of the head part 2, and the other ends of the positive connecting column 11 and the negative connecting column are respectively connected to the positive electrode and the negative electrode of the power supply; the positive connecting column 11 and the negative connecting column 12 are used for being connected to a power supply to obtain electric energy to heat and power the head 2, and the preferred positive connecting column 11 and the negative connecting column 12 are metal materials with low resistance.

In a preferred embodiment, mention is made of: the positive connecting column 11 and the negative connecting column 12 are integrally formed by metal copper.

In the present embodiment, mention is made of: the head part 2 is a titanium-molybdenum alloy head; the molybdenum-titanium alloy is an alloy formed by adding a small amount of titanium element into molybdenum as a base, and the most famous molybdenum-titanium alloy is Mo-0.5Ti alloy. Most of molybdenum-titanium alloy is made into alloy ingot by powder mixing, pressing and sintering, and then the alloy ingot is processed into material. The process is simple, the yield is high, the cost for the production of the product and the production cost which is easy to obtain are not too high, and the product has high resistance and can generate huge Joule heat; in the present embodiment, a titanium-molybdenum alloy is used, but the present application is not limited to the titanium-molybdenum alloy, and any high-resistance metal material may be substituted within the scope of the present application.

In the present embodiment, mention is made of: the front end 21 is a cone structure which mainly plays a role in draining molten tin, so that accurate spot welding of the tin is realized.

In a preferred embodiment, mention is made of: the front end 21 is of a cone-shaped configuration.

In a preferred embodiment, mention is made of: the front end 21 is of pyramidal configuration.

In a preferred embodiment, mention is made of: when the material with high resistance such as molybdenum, titanium and the like of the head part 2 melts the tin paste, the tin paste is not attached to the surface of the hot-pressing head, so that the situation of tin point non-saturation can occur; utilizing the technology of coating iron on the surface of the hot pressing head or friction welding iron, and then forming a tin surface on the surface of the iron layer; the hot pressing head is applied to the tin soldering machine, the tin soldering machine carries out tin conveying action, when a tin wire is beaten on a tin-coating surface, the tin wire is melted after encountering high temperature, the melted tin can flow to a product bonding pad along the tin-coating surface, and the melted tin is solidified after cooling, so that the effects of high welding speed and full welding are achieved.

In a preferred embodiment, mention is made of: the top of the front end is provided with a welding platform 213 to form a circular truncated cone structure or a prismatic truncated cone structure of the head; the head part forms a circular truncated cone structure or a prismatic table structure, the purpose is to enable the head part to be a head part similar to a hot-press welding technology, and molten tin is welded through the welding platform 213 when reaching the position through the side edge, so that a relatively accurate and full spot welding effect can be formed; the cone structure, the pyramid structure, the truncated cone structure or the truncated cone structure are all structures which are welded at the top after drainage, but the protection scope of the application is not limited to the four structures, and any similar or same structure is included in the protection scope of the application.

In a preferred embodiment, mention is made of: the front end is close to the lateral wall of welded platform 213 has seted up inclined platform 212, inclined platform 212 with welded platform 213 links up, and inclined platform 212's aim at better reaching the drainage effect.

The utility model has the advantages that:

1. the titanium molybdenum alloy with high resistance is used as the head of the welding nozzle, so that the effect of rapid temperature rise after electrification is achieved, the slow heat conduction mode in the prior art is replaced, and the rapid temperature rise of the welding nozzle is realized.

2. Through surface covering iron, realize gluing the effect of tin, the tin after making to melt can follow iron face flow direction pad, simple structure, convenient and practical.

The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. A rapid heating-up welding nozzle based on a hot-press welding technology is characterized by comprising a head part made of high-resistance metal and an electrode connecting part, wherein the head part comprises a front end and a rear end; the axle center of the front end protrudes outwards to form an axle center high and periphery low structure; the outer surface of the head is covered with an iron-based alloy layer.

2. A rapid temperature increase welding tip based on thermocompression bonding technology as claimed in claim 1, wherein said iron-based alloy layer is alloy cast iron.

3. A rapid heating up welding nozzle based on hot press welding technique according to claim 1 is characterized in that the positive electrode connecting part is a positive electrode connecting column, the negative electrode connecting part is a negative electrode connecting column, the fixed connection of the positive electrode connecting column and the negative electrode connecting column is fixedly connected with the rear end of the head, and the other end is respectively connected to the positive electrode and the negative electrode of the power supply.

4. The rapid heating welding nozzle based on the hot-press welding technology as claimed in claim 3, wherein the positive connecting column and the negative connecting column are integrally formed by metal copper.

5. A rapid temperature increase torch based on thermocompression bonding technology as claimed in claim 1 wherein said head is a titanium molybdenum alloy head.

6. A rapid-heating tip according to claim 1, wherein the tip is of a cone or pyramid configuration.

7. A rapid-heating welding nozzle based on a hot-press welding technology as claimed in claim 6, characterized in that the top of the front end is provided with a welding platform to form a truncated cone structure or a truncated pyramid structure of the head.

8. The rapid heating torch according to claim 7, wherein the front end of the rapid heating torch is provided with an inclined platform on a side wall thereof close to the welding platform, and the inclined platform is connected to the welding platform.

9. A rapid-heating tip according to claim 1, wherein the iron-based alloy layer is clad or friction welded to the outer surface of the head.