阅读说明：本技术 一种超大金属构件多机器人协同增材平台及增材方法 (Multi-robot collaborative material increase platform and material increase method for oversized metal component ) 是由 彭勇 方辉 王克鸿 周威 董祚继 于 2020-01-15 设计创作，主要内容包括：本发明公开了一种超大金属构件多机器人协同增材平台及增材方法,该平台包括地轨组件、横梁组件、立柱组件、平台组件、拖链组件、工业机器人、焊接系统；增材的方法为：将金属构件分割为若干最小增材单位并确定其对应特征坐标点,机器人处于特征坐标点时能完成该增材单位所有点的增材,机器人本体在基板的X方向、Y方向分别同时相向进行增材,在整个增材过程中在最小增材单元对应的特征坐标点之间进行来回运动,大大降低了机器人本体在增材过程中的运动频率,有效提高增材精度；有效避免了热量在同一个部位集中产生的问题,分散了热输入,在这一种增材条件下,基板的整体应力变形变小,并且基本不存在处于空闲状态的机器人,增材效率高。(The invention discloses a multi-robot collaborative material increase platform and a material increase method for an oversized metal component, wherein the platform comprises a ground rail component, a beam component, a stand column component, a platform component, a drag chain component, an industrial robot and a welding system; the material increase method comprises the following steps: the metal component is divided into a plurality of minimum material increase units and corresponding characteristic coordinate points of the minimum material increase units are determined, material increase of all the points of the material increase units can be completed when the robot is located at the characteristic coordinate points, the robot body performs material increase in the X direction and the Y direction of the substrate respectively and simultaneously in opposite directions, and the robot body performs back and forth movement between the characteristic coordinate points corresponding to the minimum material increase units in the whole material increase process, so that the movement frequency of the robot body in the material increase process is greatly reduced, and the material increase precision is effectively improved; the problem that heat is concentrated at the same position and generated is effectively avoided, heat input is dispersed, under the material increase condition, the whole stress deformation of the substrate is reduced, a robot in an idle state basically does not exist, and the material increase efficiency is high.)

1. The utility model provides an ultra-large metal component multi-robot collaborative material increase platform which characterized in that includes:

the ground rail assembly is used for moving the beam assembly, the upright post assembly, the platform assembly and the robot in the X direction integrally;

the beam assembly is used for moving the opposite column assembly and the robot in the Y direction;

the stand column assembly is used for Z-direction movement of the robot;

the platform assembly is used for placing a robot control cabinet, a welding power supply and protective gas cylinder equipment;

a drag chain component for controlling the movement of the beam component, the upright component, the platform component and the robot in all directions

The industrial robot is inversely arranged on the column assembly and is used for clamping the welding gun to realize automatic material increase;

the welding system comprises a welding power supply, a shielding gas and a welding gun, and is used for deposition of metal welding wires.

2. The oversized metal component multi-robot collaborative material increase platform as recited in claim 1, wherein the ground rail assemblies are installed in parallel to realize overall X-direction movement of the beam assembly, the column assembly, the platform assembly and the robot.

3. The oversized metal component multi-robot collaborative material increase platform as claimed in claim 1, wherein the beam assembly is erected on a ground rail assembly, and the column assembly and the robot mounted on the beam assembly can realize Y-direction movement.

4. The multi-robot collaborative additive platform for oversized metal components as recited in claim 1, wherein the column assembly is assembled on the beam assembly, and is capable of achieving Z-direction motion in addition to Y-direction motion on the beam assembly.

5. The multi-robot collaborative additive platform for the oversized metal component according to claim 1, wherein the platform can expand the number of robots by adding the number of beam assemblies and column assemblies, so that the oversized metal component collaborative additive platform for six robots, eight robots and more is constructed.

6. The method for performing additive manufacturing on the oversized metal component based on the multi-robot collaborative additive manufacturing platform for the oversized metal component as claimed in claim 1 is characterized by comprising the following steps of:

step 1: when the robot is at a fixed point, a welding gun clamped by the robot can complete material increase of any point in a cuboid at a height a x a z from the point H in space, the cuboid is used as the minimum material increase unit of an oversized metal member to divide the metal member on the substrate, and a plurality of small three-dimensional entities and robot characteristic coordinate points corresponding to the small three-dimensional entities are obtained and numbered;

step 2: respectively slicing the small three-dimensional entities in layers in electric arc additive slicing software, determining the additive layer height and the weld width of each layer according to selected filling materials and process parameters, independently slicing a plurality of small three-dimensional entities in layers in a Z direction by using the electric arc additive slicing software according to the determined layer heights to obtain a two-dimensional profile map of each layer of each small entity, and generating an additive path corresponding to each point on each small three-dimensional entity by using a bias algorithm or a parallel line scanning algorithm;

and step 3: the two beam assemblies respectively move above a first row and a last row of the first-layer additive unit, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the row of additive units, the upright post assemblies are controlled to move above the first row and the last row of the first-layer additive unit, the Y, Z coordinate of the robot is the same as the Y, Z coordinate of the robot characteristic coordinate point corresponding to the row of additive units, and an additive program corresponding to the characteristic coordinate point is introduced into the robot demonstrator;

and 4, step 4: after each robot finishes material increase of the current layer of the current row of material increase units, two upright post assemblies on each beam assembly move oppositely to enable the robot to reach the characteristic coordinate points of the next row of material increase units and guide a material increase program corresponding to the characteristic coordinate points into a robot demonstrator to carry out material increase work of the layer of the next material increase unit until the upright post assemblies are adjacent;

and 5: the two beam assemblies move oppositely to enable the robot to reach the position above the next row of material increase units, and the step 3 and the step 4 are repeated until the beam assemblies are adjacent to each other and the material increase of the current layer of all the material increase units of the first layer is completed;

step 6: repeating the step 3, the step 4 and the step 5 until all the additive units on the first layer are subjected to additive machining;

and 7: the two beam assemblies respectively move above a first row and a last row of the additive unit of the second layer, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the additive unit of the row, the upright post assemblies are controlled to move above a first row and a last row of the additive unit of the second layer, so that the Y, Z coordinate of the robot is the same as the coordinate of the robot characteristic coordinate point Y, Z corresponding to the additive unit of the row, an additive program corresponding to the characteristic coordinate point is guided into the robot demonstrator, and the steps 4, 5 and 6 are repeated to finish additive of all the additive units of the second layer;

and 8: and repeating the steps to complete the material increase of all the material increase units, and finally completing the material increase work of the oversized metal component.

7. The method for performing additive manufacturing on the oversized metal component by using the oversized metal component multi-robot collaborative additive manufacturing platform according to the claim 6, wherein the size of the minimum additive manufacturing unit in the step 1 is determined by the model of the selected robot, and by setting the minimum additive manufacturing unit, the robot body only needs to move back and forth between the characteristic coordinate points corresponding to the minimum additive manufacturing units in the whole additive manufacturing process, so that the movement frequency of the robot body in the additive manufacturing process is greatly reduced, and the efficiency and the precision are improved.

8. The method for performing additive manufacturing on the oversized metal component by using the oversized metal component multi-robot collaborative additive manufacturing platform as claimed in claim 6, wherein in the step 2, the filling material can be selected from the same or different materials, so that the additive manufacturing of a heterogeneous component or a gradient component is realized.

Technical Field

The invention belongs to the field of metal arc additive manufacturing, and particularly relates to a multi-robot collaborative additive platform and an additive method for an oversized metal component.

Background

The electric arc additive manufacturing is a manufacturing method for realizing the molding of a workpiece by melting wire materials through electric arcs and stacking metal layer by layer. The traditional arc additive manufacturing step is to perform overall slicing and path planning on a three-dimensional model of a component through slicing software, and output a program to a welding robot demonstrator for additive manufacturing operation. Because the work area of the welding robot body is limited, the work efficiency of a single robot is also limited. So that a single robotic arc additive method cannot produce oversized components. Therefore, a platform and an additive method for multi-robot collaborative additive of ultra-large metal components are needed to be developed.

The patent with application number CN201811619733.8 discloses an arc additive manufacturing method for manufacturing large-sized parts, which performs additive manufacturing of parts on a rotatable turntable, and expands the working range of the robot by rotating a component through the rotatable turntable. But the method has limited size range of the additive component, and the additive work is carried out by one robot, so the efficiency is low.

Disclosure of Invention

The invention aims to provide a multi-robot collaborative material increase platform and a material increase method for an oversized metal component, so that the size of the metal component capable of being subjected to material increase is greatly increased, and the material increase efficiency is greatly improved.

In order to solve the problems, the invention adopts the technical scheme that: the utility model provides an ultra-large metal component multi-robot collaborative material increase platform which characterized in that includes:

the ground rail assembly is used for the overall X-direction movement of the beam assembly, the upright post assembly, the platform assembly and the robot;

the beam assembly is used for the Y-direction movement of the upright post assembly and the robot;

the stand column assembly is used for Z-direction movement of the robot;

the platform assembly is used for placing a robot control cabinet, a welding power supply and protective gas cylinder equipment;

the drag chain assembly is used for controlling the cross beam assembly, the upright post assembly, the platform assembly and the industrial robot to move in all directions, is inversely arranged on the upright post assembly and is used for clamping a welding gun to realize automatic material increase;

the welding system comprises a welding power supply, a shielding gas and a welding gun, and is used for deposition of metal welding wires.

As an improvement, the ground rail assemblies are installed in parallel, and the overall X-direction movement of the beam assembly, the upright post assembly, the platform assembly and the robot is realized.

As an improvement, the beam assembly is erected on a ground rail, and the upright post assembly and the robot which are installed on the beam assembly can realize Y-direction movement.

As an improvement, the upright post assembly is assembled on the cross beam assembly, and can realize the motion in the Z direction besides the motion in the Y direction on the cross beam assembly.

As an improvement, the platform can expand the number of robots by adding the number of beam assemblies and column assemblies, so that the oversized metal component collaborative material increase platform construction of six robots, eight robots and more robots is realized.

A method for performing additive manufacturing on an oversized metal component by using the oversized metal component multi-robot collaborative additive manufacturing platform is characterized by comprising the following steps:

step 1: when the robot is at a fixed point, a welding gun clamped by the robot can complete material increase of any point in a cuboid at a position a x z away from the height H of the point in space, the cuboid is used as the minimum material increase unit of an oversized metal member to divide the metal member on the substrate, and a plurality of small three-dimensional entities and robot characteristic coordinate points corresponding to the small three-dimensional entities are obtained and numbered;

step 2: respectively slicing the small three-dimensional entities in layers in electric arc additive slicing software, determining the additive layer height and the weld width of each layer according to selected filling materials and process parameters, independently slicing a plurality of small three-dimensional entities in layers in a Z direction by using the electric arc additive slicing software according to the determined layer heights to obtain a two-dimensional profile map of each layer of each small entity, and generating an additive path corresponding to each point on each small three-dimensional entity by using a bias algorithm or a parallel line scanning algorithm;

and step 3: the two beam assemblies respectively move above a first row and a last row of the first-layer additive unit, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the row of additive units, the upright post assemblies are controlled to move above the first row and the last row of the first-layer additive unit, the Y, Z coordinate of the robot is the same as the Y, Z coordinate of the robot characteristic coordinate point corresponding to the row of additive units, and an additive program corresponding to the characteristic coordinate point is introduced into the robot demonstrator;

and 4, step 4: after each robot finishes material increase of the current layer of the current row of material increase units, two upright post assemblies on each beam assembly move oppositely to enable the robot to reach the characteristic coordinate points of the next row of material increase units and guide a material increase program corresponding to the characteristic coordinate points into a robot demonstrator to carry out material increase work of the layer of the next material increase unit until the upright post assemblies are adjacent;

and 5: the two beam assemblies move oppositely to enable the robot to reach the position above the next row of material increase units, and the step 3 and the step 4 are repeated until the beam assemblies are adjacent to each other and the material increase of the current layer of all the material increase units of the first layer is completed;

step 6: repeating the step 3, the step 4 and the step 5 until all the additive units on the first layer are subjected to additive machining;

and 7: the two beam assemblies respectively move above a first row and a last row of the additive unit of the second layer, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the additive unit of the row, the upright post assemblies are controlled to move above a first row and a last row of the additive unit of the second layer, so that the Y, Z coordinate of the robot is the same as the coordinate of the robot characteristic coordinate point Y, Z corresponding to the additive unit of the row, an additive program corresponding to the characteristic coordinate point is guided into the robot demonstrator, and the steps 4, 5 and 6 are repeated to finish additive of all the additive units of the second layer;

and 8: and repeating the steps to complete the material increase of all the material increase units, and finally completing the material increase work of the oversized metal component.

As an improvement, in the step 1, the size of the minimum additive unit is determined by the model of the selected robot, and by setting the minimum additive unit, the robot body only needs to move back and forth between the characteristic coordinate points corresponding to the minimum additive units in the whole additive process, so that the movement frequency of the robot body in the additive process is greatly reduced, and the efficiency and the precision are improved.

As a modification, in the step 2, the same or different materials can be selected as the filling materials, so that the heterogeneous component or the gradient component is added.

As an improvement, in the subsequent steps, the materials are added in the X direction and the Y direction of the substrate respectively and simultaneously, so that the problem that heat is concentrated at the same position is effectively avoided, heat input is dispersed, under the material adding condition, the whole stress deformation of the substrate is reduced, a robot in an idle state is basically absent, and the material adding efficiency is high.

Compared with the prior art, the invention has the following remarkable advantages:

1. the material increase work is carried out on a double-gantry platform with a three-dimensional movable robot, and the robot and a welding gun clamped by the robot can reach any position in a working area through the movement of an upper cross beam assembly and an upright post assembly of the platform; 2. according to the invention, the minimum additive unit division is firstly carried out on the metal components on the substrate, then the three-dimensional entities of the components in the additive units are respectively subjected to layered slicing and path planning to obtain corresponding additive programs, and in the additive process, the four robot bodies move oppositely to increase materials, so that the additive efficiency is ensured, and the multi-robot efficient collaborative additive of the ultra-large metal components is realized.

Drawings

Fig. 1 is a front view of the oversized metal component multi-robot collaborative additive platform of the invention.

Fig. 2 is a top view of the oversized metal component multi-robot collaborative additive platform of the invention.

FIG. 3 is a partial enlarged view of the left side of the top view of the oversized metal component multi-robot collaborative additive platform according to the present invention.

FIG. 4 is a partial enlarged view of the right side of the top view of the oversized metal component multi-robot collaborative additive platform according to the present invention.

Fig. 5 is a left side view of the oversized metal component multi-robot collaborative additive platform of the invention.

Fig. 6 is a three-dimensional schematic view of the oversized metal component multi-robot collaborative additive platform of the invention.

The device comprises a ground rail assembly 1, a cross beam assembly 2, a column assembly I3, a column assembly II 4, a column assembly III 5, a platform assembly 6 and a cross beam drag chain assembly 7.

Detailed Description

The following description of the preferred embodiment is provided in order to more clearly explain the present invention. It is to be noted that the following description is intended to facilitate the understanding of the present invention, and does not put any limitation thereon.

As shown in fig. 1 to 6, a multi-robot collaborative additive platform for oversized metal components includes:

the ground rail assembly is used for the overall X-direction movement of the beam assembly, the upright post assembly, the platform assembly and the robot;

the two sets of beam assemblies are used for the Y-direction movement of the upright post assembly and the robot;

the four sets of upright post assemblies are used for the Z-direction movement of the robot;

the platform assembly is used for placing a robot control cabinet, a welding power supply and protective gas cylinder equipment;

a drag chain component for controlling the movement of the beam component, the upright component, the platform component and the robot in all directions

The four industrial robots are inversely arranged on the column assembly and are used for clamping the welding gun to realize automatic material increase;

the four sets of welding systems comprise a welding power supply, shielding gas and a welding gun and are used for deposition of metal welding wires.

As an improvement, the total length of the rail assembly is 31752mm, the installation distance between the double rails is 5752mm, and the X-direction movement stroke on the ground rail is 26764 mm.

As an improvement, two sets of beam assemblies are erected on the ground rail, the total length of the beam is 8220mm, and the Y-direction movement stroke on the beam is 3703 mm.

As an improvement, four sets of stand column assemblies are respectively assembled on two sets of beam assemblies, two sets of stand column assemblies are assembled on each set of beam assembly, and the movement stroke of the stand column assemblies in the Z direction is 2285 mm.

As an improvement, the number of robots can be expanded by adding the number of beam assemblies and column assemblies to the platform, so that the construction of the oversized metal component collaborative material increase platform of six robots, eight robots and more robots is realized.

A method for performing oversized metal component additive manufacturing by using the platform comprises the following steps:

step 1: when the robot is at a fixed point, a welding gun clamped by the robot can complete material increase of any point in a cuboid at a position a x z away from the height H of the point in space, the cuboid is used as the minimum material increase unit of an oversized metal member to divide the metal member on the substrate, and a plurality of small three-dimensional entities and robot characteristic coordinate points corresponding to the small three-dimensional entities are obtained and numbered;

step 2: respectively slicing the small three-dimensional entities in layers in electric arc additive slicing software, determining the additive layer height and the weld width of each layer according to selected filling materials and process parameters, independently slicing a plurality of small three-dimensional entities in layers in a Z direction by using the electric arc additive slicing software according to the determined layer heights to obtain a two-dimensional profile map of each layer of each small entity, and generating an additive path corresponding to each point on each small three-dimensional entity by using a bias algorithm or a parallel line scanning algorithm;

and step 3: the two beam assemblies respectively move above a first row and a last row of the first-layer additive unit, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the row of additive units, the upright post assemblies are controlled to move above the first row and the last row of the first-layer additive unit, the Y, Z coordinate of the robot is the same as the Y, Z coordinate of the robot characteristic coordinate point corresponding to the row of additive units, and an additive program corresponding to the characteristic coordinate point is introduced into the robot demonstrator;

and 4, step 4: after each robot finishes material increase of the current layer of the current row of material increase units, two upright post assemblies on each beam assembly move oppositely to enable the robot to reach the characteristic coordinate points of the next row of material increase units and guide a material increase program corresponding to the characteristic coordinate points into a robot demonstrator to carry out material increase work of the layer of the next material increase unit until the upright post assemblies are adjacent;

and 5: the two beam assemblies move oppositely to enable the robot to reach the position above the next row of material increase units, and the step 3 and the step 4 are repeated until the beam assemblies are adjacent to each other and the material increase of the current layer of all the material increase units of the first layer is completed;

step 6: repeating the step 3, the step 4 and the step 5 until all the additive units on the first layer are subjected to additive machining;

and 7: the two beam assemblies respectively move above a first row and a last row of the additive unit of the second layer, so that the X coordinate of the robot is the same as the X coordinate of the robot characteristic coordinate point corresponding to the additive unit of the row, the upright post assemblies are controlled to move above a first row and a last row of the additive unit of the second layer, so that the Y, Z coordinate of the robot is the same as the coordinate of the robot characteristic coordinate point Y, Z corresponding to the additive unit of the row, an additive program corresponding to the characteristic coordinate point is guided into the robot demonstrator, and the steps 4, 5 and 6 are repeated to finish additive of all the additive units of the second layer;

and 8: and repeating the steps to complete the material increase of all the material increase units, and finally completing the material increase work of the oversized metal component.

As an improvement, in the step 1, the size of the minimum additive unit is determined by the model of the selected robot, and by setting the minimum additive unit, the robot body only needs to move back and forth between the characteristic coordinate points corresponding to the minimum additive units in the whole additive process, so that the movement frequency of the robot body in the additive process is greatly reduced, and the efficiency and the precision are improved.

As a modification, in the step 2, the same or different materials can be selected as the filling materials, so that the heterogeneous component or the gradient component is added.

As an improvement, in the subsequent steps, the materials are added in the X direction and the Y direction of the substrate respectively and simultaneously, so that the problem that heat is concentrated at the same position is effectively avoided, heat input is dispersed, under the material adding condition, the whole stress deformation of the substrate is reduced, a robot in an idle state is basically absent, and the material adding efficiency is high.