阅读说明：本技术 一种基于等离子束-激光复合热源的增材制造设备与方法 (additive manufacturing equipment and method based on plasma beam-laser composite heat source ) 是由 杨永强 翁昌威 秦文韬 李阳 宋长辉 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种基于等离子束-激光复合热源的增材制造设备,包括特制刀具库、成型密封腔、保护气气瓶、等离子焊接机器人、激光辅助机器人、两轴变位机、监控系统、等离子束-激光复合热源熔融沉积系统以及集成控制系统。本发明采用等离子束-激光复合热源熔融沉积,解决了等离子束增材制造的界面结合问题,提高界面结合强度和零件性能,大大提高的零件的成型效率。本发明还采用了双机械臂作为运动载体,能够实现复杂空间曲面等复杂零件的制造以及大尺寸零件的快速成型或修复。(the invention discloses additive manufacturing equipment based on a plasma beam-laser composite heat source, which comprises a special tool library, a forming sealing cavity, a shielding gas cylinder, a plasma welding robot, a laser auxiliary robot, a two-axis positioner, a monitoring system, a plasma beam-laser composite heat source fused deposition system and an integrated control system. The plasma beam-laser composite heat source fusion deposition method solves the interface bonding problem of plasma beam additive manufacturing, improves the interface bonding strength and the part performance, and greatly improves the part forming efficiency. The invention also adopts the double mechanical arms as the motion carrier, and can realize the manufacture of complex parts such as complex space curved surfaces and the like and the rapid forming or repairing of large-size parts.)

1. additive manufacturing equipment based on a plasma beam-laser composite heat source is characterized by comprising a special cutter library, a forming sealing cavity, a shielding gas cylinder, a plasma welding robot, a laser auxiliary robot, a two-axis positioner, a monitoring system, a plasma beam-laser composite heat source fused deposition system and an integrated control system;

The forming sealing cavity is provided with a connector, and a protective gas cylinder is used for introducing protective gas into the forming sealing cavity through the connector to provide inert gas for atmosphere protection;

The two-axis positioner, the special cutter library, the monitoring system, the plasma welding robot and the laser auxiliary robot are all positioned in the sealed forming cavity;

The two-axis positioner is used for providing rotation in the directions of the C axis and the A axis; the two-axis positioner is provided with a heating pad for preheating; the heating pad is connected with the heating device through a cable;

The plasma welding robot and the monitoring system are positioned on one side of the two-axis positioner, and the laser auxiliary robot is positioned on the other side of the two-axis positioner;

The special tool library is used for temporarily placing a plasma beam wire feeding welding torch and a plasma powder feeding welding torch;

the monitoring system is provided with a high-speed camera and a light diode and is used for acquiring a molten pool image and a part image in real time in the material increase process;

The plasma beam-laser composite heat source fused deposition system comprises a plasma beam wire feeding welding torch, a plasma powder feeding type welding torch, a laser head, a wire feeder, a powder feeder, a plasma generator, a water cooler and a laser;

The wire feeder is used for providing metal wires for the plasma beam wire feeding welding torch for fusion deposition;

the powder feeder is used for supplying metal powder materials to the plasma powder feeding type welding torch in the material increase process;

the plasma generator is respectively connected with the plasma beam wire feeding welding torch and the plasma powder feeding welding torch and is used for generating plasma beams in the processing process;

the laser head is connected with the laser and used for providing high-energy laser beams;

The water cooling machine is respectively connected with the laser head and the laser and is used for providing cooling water for cooling;

the protective gas cylinder is connected with the plasma generator and provides ionized gas; the protective gas cylinder is connected with the powder feeder and is used for air-carrying powder feeding; the protective gas cylinder is respectively connected with the plasma beam wire feeding welding torch, the plasma powder feeding welding torch and the laser head and provides protective gas in the processing process;

The special cutter storehouse, the forming sealed cavity, the plasma welding robot, the laser auxiliary robot, the two-axis positioner, the monitoring system and the plasma beam-laser composite heat source fused deposition system are all connected with the integrated control system and are cooperatively controlled by the integrated control system.

2. The apparatus of claim 1, wherein the two-axis positioner provides an unlimited range of C-axis angles, and an a-axis angle of ± 110 °.

3. the apparatus of claim 1, wherein the plasma welding robot is a six-axis robot, and the clamping of the plasma beam wire feeding torch and the plasma powder feeding torch is switched by a quick-connection flange.

4. The apparatus of claim 1 wherein the laser assisted robot is a six axis robot, loading laser heads through a flange.

5. a method of additive manufacturing based on the apparatus of claims 1-4, comprising the steps of:

(1) importing the preprocessed model data into an integrated control system;

(2) Introducing protective gas into the molding sealing cavity and starting a heating device to enable the preheated substrate to reach a set temperature;

(3) the plasma welding robot goes to a special cutter library to grab a plasma beam wire feeding welding torch or a plasma powder feeding welding torch;

(4) The plasma welding robot and the laser auxiliary robot move to the material increase starting point;

(5) starting a water cooling machine, a wire feeder or a powder feeder, a plasma generator, a laser and a monitoring system, and performing an additive manufacturing process according to a set path;

(6) After a plurality of layers of additive manufacturing are carried out, the additive manufacturing process is suspended, the part obtained by actual additive manufacturing is scanned by the monitoring system and compared with the designed part, the obtained size difference is fed back to the integrated control system, and compensation is carried out on the next plurality of layers;

(7) circulating the steps (5) and (6) until the part is manufactured;

(8) the plasma beam wire-feeding welding torch or the plasma powder-feeding welding torch is placed back to the special cutter library, and the plasma welding robot and the laser auxiliary robot move to the original point of the equipment;

(9) and opening the forming sealing cavity to take out the part after the sample piece is cooled to room temperature.

6. The method of claim 5, wherein the number of layers is 5-8 layers.

Technical Field

The invention relates to the field of metal part additive manufacturing, in particular to additive manufacturing equipment and method based on a plasma beam-laser composite heat source.

background

the additive manufacturing technology is also called as a 3D printing technology, and can rapidly and accurately manufacture parts with complex shapes layer by layer on corresponding forming equipment after three-dimensional model data is processed and sliced, so that rapid and free manufacturing is realized, the design idea is liberated, and a method which can almost form parts with any complex shapes is provided for people.

The plasma beam-laser composite heat source fused deposition additive manufacturing equipment develops on the basis of a plasma beam additive manufacturing technology, and with the practical application of the plasma beam additive manufacturing technology, people find that the interface bonding strength is insufficient, the conditions that the interface bonding strength is low, the substrate is separated in the printing process, and even the substrate is difficult to bond easily occur.

Disclosure of Invention

the invention aims to overcome the defects of the prior art and provides additive manufacturing equipment based on a plasma beam-laser composite heat source. The invention can solve the problem of interface bonding in the additive manufacturing process, and improve the interface bonding strength, thereby improving the performance of parts.

The invention can be realized by the following technical scheme:

a material increase manufacturing device based on a plasma beam-laser composite heat source comprises a special cutter library, a forming sealing cavity, a shielding gas cylinder, a plasma welding robot, a laser auxiliary robot, a two-axis positioner, a monitoring system, a plasma beam-laser composite heat source fusion deposition system and an integrated control system.

The forming sealing cavity is provided with a connector, and the protective gas cylinder is used for introducing protective gas into the forming sealing cavity through the connector to provide inert gas for atmosphere protection.

and the two-axis positioner, the special cutter library, the monitoring system, the plasma welding robot and the laser auxiliary robot are all positioned in the sealed forming cavity.

The two-axis positioner is used for providing rotation in the directions of the C axis and the A axis; the two-axis positioner is provided with a heating pad for preheating; the heating pad is connected with the heating device through a cable.

the plasma welding robot and the monitoring system are positioned on one side of the two-axis positioner, and the laser auxiliary robot is positioned on the other side of the two-axis positioner.

the special tool library is used for temporarily placing a plasma beam wire feeding welding torch and a plasma powder feeding welding torch.

the monitoring system is provided with a high-speed camera and a light diode and is used for acquiring a molten pool image and a part image in real time in the material increase process.

the plasma beam-laser composite heat source fused deposition system comprises a plasma beam wire feeding welding torch, a plasma powder feeding type welding torch, a laser head, a wire feeder, a powder feeder, a plasma generator, a water cooler and a laser.

The wire feeder is used for providing metal wire materials for the plasma beam wire feeding welding torch for fusion deposition.

The powder feeder is used to provide metallic powder material to a plasma powder feed torch during an additive process.

The plasma generator is respectively connected with the plasma beam wire feeding welding torch and the plasma powder feeding welding torch and is used for generating plasma beams in the machining process.

The laser head is connected with a laser for providing a high-energy laser beam.

the water cooling machine is respectively connected with the laser head and the laser and used for providing cooling water for cooling.

The protective gas cylinder is connected with the plasma generator and provides ionized gas; the protective gas cylinder is connected with the powder feeder and is used for air-carrying powder feeding; the protective gas cylinder is respectively connected with the plasma beam wire feeding welding torch, the plasma powder feeding welding torch and the laser head to provide protective gas in the processing process.

the special cutter storehouse, the forming sealed cavity, the plasma welding robot, the laser auxiliary robot, the two-axis positioner, the monitoring system and the plasma beam-laser composite heat source fused deposition system are all connected with the integrated control system and are cooperatively controlled by the integrated control system.

Specifically, the range of the C-axis angle provided by the two-axis positioner is not limited, and the range of the A-axis angle is +/-110 degrees.

specifically, the plasma welding robot is a six-axis robot, and clamping switching between a plasma beam wire feeding welding torch and a plasma powder feeding welding torch is performed through a quick-connection flange.

Specifically, the laser auxiliary robot is a six-axis robot, and the laser heads are loaded through the flange plates.

Another object of the present invention is to provide an additive manufacturing method based on a plasma beam-laser composite heat source, comprising the steps of:

(1) importing the preprocessed model data into an integrated control system;

(2) Introducing protective gas into the molding sealing cavity and starting a heating device to enable the preheated substrate to reach a set temperature;

(3) The plasma welding robot goes to a special cutter library to grab a plasma beam wire feeding welding torch or a plasma powder feeding welding torch;

(4) The plasma welding robot and the laser auxiliary robot move to the material increase starting point;

(5) Starting a water cooling machine, a wire feeder or a powder feeder, a plasma generator, a laser and a monitoring system, and performing an additive manufacturing process according to a set path;

(6) after a plurality of layers of additive manufacturing are carried out, the additive manufacturing process is suspended, the part obtained by actual additive manufacturing is scanned by the monitoring system and compared with the designed part, the obtained size difference is fed back to the integrated control system, and compensation is carried out on the next plurality of layers;

(7) Circulating the steps (5) and (6) until the part is manufactured;

(8) the plasma beam wire-feeding welding torch or the plasma powder-feeding welding torch is placed back to the special cutter library, and the plasma welding robot and the laser auxiliary robot move to the original point of the equipment;

(9) And opening the forming sealing cavity to take out the part after the sample piece is cooled to room temperature.

Specifically, several layers are adjusted as needed, typically 5-8 layers.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention adopts the plasma beam-laser composite heat source to carry out fused deposition, solves the problem of interface bonding in plasma beam additive manufacturing, improves the interface bonding strength and improves the part performance.

2. the invention adopts the plasma beam-laser composite heat source, greatly improves the forming efficiency of parts and can realize the rapid forming or repairing of large-size parts.

3. The invention adopts the double mechanical arms as the motion carrier, and can realize the manufacture of complex parts such as complex space curved surfaces and the like.

4. the invention realizes the on-line monitoring of the forming process and the feedback adjustment of the forming size by introducing the molten pool monitoring system, thereby improving the forming quality.

Drawings

Fig. 1 is a schematic structural diagram of a plasma beam-laser composite heat source fused deposition additive manufacturing device according to the invention.

Fig. 2 is a schematic diagram of plasma laser interaction in the plasma beam-laser composite heat source fused deposition additive manufacturing apparatus according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.