CN212885716U

CN212885716U - Laser cladding wire feeding composite nozzle based on 3D printing technology

Info

Publication number: CN212885716U
Application number: CN202020900665.9U
Authority: CN
Inventors: 袁晓鑫; 赵浩; 姜鑫; 李全贵; 查俊康
Original assignee: Hebei National Thousand Zeng Wood Technology Co ltd
Current assignee: Hebei National Thousand Zeng Wood Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-04-06
Anticipated expiration: 2030-05-21

Abstract

A laser cladding wire feeding composite nozzle based on a 3D printing technology. The utility model discloses a laser cladding send a composite jet based on 3D printing technique, include air inlet, stiff end, nozzle wall, send a pipe support frame, gas outlet, belong to the laser beam machining field. The gas inlet is connected with a gas pipe, and protective gas is introduced from the gas pipe; the fixed end is connected with a fixing device to fix the whole nozzle; the wire feeding pipe enables the welding wire to enter from one side of the fixed end, and one side of the air outlet extends out of the processing area; a plurality of wire feeding pipe supporting frames are arranged in the nozzle to support the wire feeding pipes without deformation; the protective gas entering through the gas inlet flows through the cavity between the nozzle wall and the wire feeding pipe, is discharged from the gas outlet and is blown to the processing area. The nozzle directly takes shape through the 3D printing technique, has integrateed and has sent a and carry the function of protective gas, has effectively solved laser cladding and has sent a problem that the in-process protective gas can not concentrate on processing region, has improved work piece shaping quality.

Description

Laser cladding wire feeding composite nozzle based on 3D printing technology

Technical Field

The utility model relates to a laser cladding send a composite jet nozzle based on 3D printing technique belongs to the laser beam machining field.

Background

In recent years, laser processing techniques have been developed, and the corners of the head are exposed in various fields. The laser processing belongs to one of special processing, which is to project high-energy laser beams onto the surface of a material to be processed and process the material by utilizing the heat generated by the high concentration of the laser or the characteristics of the beams. Common laser processing includes laser welding, laser cladding, laser cutting, and the like.

Laser cladding is a method of placing a cladding material on the surface of a workpiece to be clad, and forming a surface coating with extremely low dilution on the surface of the workpiece through laser irradiation, wherein the coating generally has excellent characteristics of wear resistance, corrosion resistance, oxidation prevention and the like. The technological method can enhance the surface performance of the parts and repair the parts, and is commonly used for the repair work of large-scale equipment.

Laser cladding can be generally divided into two types according to different feeding modes: laser wire feeding and laser powder feeding. The laser wire feeding device and the laser wire feeding device have the characteristics that the material cost of the laser wire feeding device is low, the utilization rate is high, the pollution to the surrounding environment is avoided, the storage is convenient, and the research value is high.

In the process of laser wire feeding, protective gas is needed to fill a processing area, so that the wire and a workpiece are prevented from being oxidized, and the forming quality is prevented from being influenced. The common protective gas layout modes include two, namely a gas pipe and a wire feeding pipe are coaxial or the gas pipe and the wire feeding pipe form a certain angle. When the air pipe and the wire feeding pipe are coaxial, the protective gas is always concentrated in a processing area and is not limited by the movement direction and the wire feeding angle, but the structure is complex and requires a certain design and processing period; when the air pipe and the wire feeding pipe form a certain angle, the structure is simple, but along with the change of the motion direction and the wire feeding angle, the protective gas cannot be always concentrated in a processing area, and the forming quality of a workpiece is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laser cladding send a composite jet based on 3D printing technique. The composite nozzle fully exerts the technical advantages of 3D printing, has a simple structure, is practical and reliable, and effectively concentrates protective gas in a processing area by coaxially feeding and supplying gas.

The utility model adopts the technical scheme as follows: a laser cladding wire feed composite nozzle based on 3D printing technology comprises: air inlet, stiff end, nozzle wall, send silk pipe support frame, gas outlet. The nozzle material has the characteristics of high temperature resistance and oxidation resistance, and is suitable for a 3D printing process; the nozzle is formed by 3D printing, the air inlet is connected with an air pipe, and protective gas is introduced from the air pipe; the fixed end is connected with a fixing device to fix the whole nozzle; the wire feeding pipe enables the wire to enter from one side of the fixed end and extend out of one side of the air outlet to a processing area; the wire feeding pipe support frame supports the wire feeding pipe in the nozzle without deformation; and the protective gas entering through the gas inlet flows through a cavity between the nozzle wall and the wire feeding pipe, is discharged from the gas outlet and is blown to a processing area.

The nozzle is formed by 3D printing processing, the surface is cleaned and polished through post-treatment, and the fact that the wire feeding pipe is communicated with the wire and can be used at the rear without obstruction is confirmed.

The gas outlet is of a structure of first conical shape and then straight cylinder, and can shrink and concentrate gas to be blown out along the direction of the central line of the nozzle.

The nozzle should have sufficient length to ensure that the wire can be straightened at a sufficient distance after entering the wire feeding tube.

The beneficial effects of the utility model are that utilize the technical characterstic that 3D printed, simple structure, it is practical reliable, save design and processing cycle, send a gas feed through the coaxial, effectively concentrate on the processing region with protective gas.

Drawings

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

fig. 2 is a side view of the present invention;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic sectional view taken along line B-B of fig. 1.

Wherein, 1 denotes an air inlet, 2 denotes a fixed end, 3 denotes a nozzle wall, 4 denotes a wire feeding pipe, 5 denotes a wire feeding pipe support, and 6 denotes an air outlet.

Detailed Description

As shown in fig. 1-4, a laser cladding wire feeding composite nozzle based on 3D printing technology. The nozzle includes: the device comprises an air inlet 1, a fixed end 2, a nozzle wall 3, a wire feeding pipe 4, a wire feeding pipe support frame 5 and an air outlet 6. Inserting the outer tube of the air inlet 1 into the trachea; the wire material is inserted into the inlet of the wire feeding pipe 4 at one side of the fixed end 2 and penetrates out of the outlet at one side of the air outlet 6, and then the fixed end 2 is connected with a fixing device to fix the whole nozzle; the plurality of wire feed tube support frames 5 support the wire feed tube 4 inside the nozzle without deformation.

Before working, a workpiece to be machined is fixed on a movable machining platform, the position of a laser is adjusted, a light beam is perpendicular to the surface of the workpiece to be machined, and a nozzle is close to a machining area as far as possible on the premise of ensuring that the nozzle is not directly irradiated by the laser beam. After debugging is finished, the valve is opened, protective gas is introduced, the gas enters from the gas inlet 1, flows through the cavity between the nozzle wall 3 and the wire feeding pipe 4 and is blown out to the processing area from the gas outlet. And then starting the wire feeder and the laser, leading the wire material to enter a wire feeding pipe 4 of the nozzle under the action of the wire feeding mechanism, straightening the wire material at a sufficient distance, and entering a processing area at a set angle to react with the laser.

What has been described above is merely a preferred embodiment of the invention. It should be noted that, for those skilled in the art, without departing from the principle and core idea of the present invention, several variations and modifications can be made, and the protection scope of the present invention is considered to belong to the same.

Claims

1. A laser cladding wire feed composite nozzle based on 3D printing technology comprises: air inlet (1), stiff end (2), nozzle wall (3), send silk pipe (4), send silk pipe support frame (5), gas outlet (6), its characterized in that: the nozzle material has the characteristics of high temperature resistance and oxidation resistance and is suitable for a 3D printing process, the nozzle is formed by 3D printing, the air inlet (1) is connected with an air pipe, and protective gas is introduced from the air pipe; the fixed end (2) is connected with a fixing device to fix the whole nozzle; the wire feeding pipe (4) enables wires to enter from one side of the fixed end (2) and extend out of one side of the air outlet (6) to a processing area; the wire feeding pipe support frame (5) supports the wire feeding pipe (4) in the nozzle without deformation; and the protective gas entering through the gas inlet flows through a cavity between the nozzle wall (3) and the wire feeding pipe (4), is discharged from the gas outlet (6), and is blown to a processing area.

2. The laser cladding wire feeding composite nozzle based on the 3D printing technology is characterized in that: the nozzle is formed by 3D printing and machining, the surface is cleaned and polished through post-treatment, and the fact that the wire feeding pipe (4) is accessible to the rear side without obstruction when the wire is fed into the nozzle is confirmed.

3. The laser cladding wire feeding composite nozzle based on the 3D printing technology is characterized in that: the air outlet (6) is of a structure of a cone and a cylinder, and can shrink and concentrate air to be blown out along the direction of the central line of the nozzle.

4. The laser cladding wire feeding composite nozzle based on the 3D printing technology is characterized in that: the nozzle has sufficient length to ensure that the wire can be straightened at a sufficient distance after entering the wire feeding pipe (4).