CN206084386U - Increase and decrease material combined machining equipment - Google Patents

Abstract

The utility model discloses a compound processing equipment for adding and subtracting materials, which comprises an online metal arc welding additive manufacturing device and a numerically controlled multi-axis linkage processing device. The online metal arc welding additive manufacturing device includes a welding robot and a welding machine system. The welding machine system is installed on the welding robot; the multi-axis linkage processing system includes a three-dimensional measuring device and a multi-axis linkage precision machining system. The actual outline of the part is obtained from the outline information, and then compared with the theoretical three-dimensional model to obtain the error. The multi-axis linkage precision machining system is used to implement subtractive machining on the part, so that the error between the actual outline and the theoretical three-dimensional model is controlled within within the setting range. The utility model can solve the problem that the existing precision machining method is difficult to automatically process complex shapes, and can fully utilize the advantages of high arc additive manufacturing efficiency, low energy consumption and strong environmental adaptability.

Description

A compound processing equipment for adding and subtracting materials

technical field

The utility model belongs to the technical field of electric arc processing, and more specifically relates to a compound processing equipment for adding and subtracting materials.

Background technique

Arc additive manufacturing technology (Wire Additive Manufacture, WAAM) uses electric arc as a heat source to melt and deposit metal wire layer by layer to produce a three-dimensional metal blank that is close to the product design size requirements, and then supplemented by a small amount of mechanical processing to finally reach the product size A rapid manufacturing method for design requirements. It has the characteristics of high deposition efficiency and low cost, and can realize rapid manufacturing of large and complex structural parts such as high-performance superalloys, titanium alloys, aluminum alloys, and high-strength steels. In the process of WAAM cladding, different materials can be used for different structures, thereby greatly improving the flexibility of manufacturing; it is not sensitive to geometric shapes, especially angles, and generally does not need to add auxiliary supports during the manufacturing process, which greatly expands the scope of metal additive manufacturing. application range.

Products based on WAAM technology can avoid pores, segregation and microcracks of large-size cast/forged parts, and the structure and mechanical properties of parts formed by full fusion surfacing are also stronger than cast and forged parts. Compared with forging technology products, raw materials are saved, especially precious metal materials. Therefore, the arc forming technology of metal parts has broad prospects, and the metal wire additive manufacturing technology has become one of the hot spots in the field of 3D printing at home and abroad.

However, for complex mechanical parts with complex surface shapes and internal flow channels, traditional precision machining methods cannot be approached by mechanical tools, and the post-processing of parts generally cannot be processed automatically by CNC. Although manual post-processing can improve the surface finish, it cannot precisely control the dimensional accuracy, and it is also difficult to deal with the surface of solid internal structures such as inner runners. The speed of machining precision molds by electrochemical machining is slow, and the NC programming is complicated.

Utility model content

Aiming at the above defects or improvement needs of the prior art, the utility model provides a compound processing equipment for adding and subtracting materials and its application, the purpose of which is to give full play to the high molding efficiency of arc additive manufacturing, low manufacturing cost, suitable for parts repair and direct manufacturing , indoor or field work, etc., and at the same time solve the problems of poor surface quality, low precision and printing of simple structural parts in existing electric arc additive manufacturing. Complex mechanical parts with complex shapes and inner runners, and the technical problems of precise control of dimensional accuracy and surface roughness control.

In order to achieve the above purpose, according to one aspect of the utility model, a compound processing equipment for adding and subtracting materials is provided, which is characterized in that it includes an online metal arc welding additive manufacturing device, a numerically controlled multi-axis linkage processing device and a heat treatment device, wherein,

The online metal arc welding additive manufacturing device includes a welding robot and a welding machine system, and the welding machine system is installed on the welding robot for implementing additive processing;

The multi-axis linkage processing system includes a three-dimensional measuring device and a multi-axis linkage precision machining system. The three-dimensional measurement device is used to measure the contour information of the part and send it to the computer. The multi-axis linkage precision machining system is used to reduce the parts. material processing;

The heat treatment device includes a water-cooled box and a backing plate placed in the water-cooled box, the water-cooled box is fixedly installed on the lifting workbench, the backing plate is used to accept parts formed by additive processing, and the backing plate passes through The cooling copper block is installed in the water cooling box, the cooling copper block is provided with a circulating water circuit for cooling parts, and the water cooling box is provided with a water inlet and a water outlet communicating with the circulating water circuit, so The backing plate is provided with a temperature control system.

Preferably, the three-dimensional measurement device is a three-dimensional measurement scanner.

Generally speaking, compared with the prior art, the above technical solutions conceived by the utility model can achieve the following beneficial effects:

1) The online metal arc welding additive manufacturing device and the CNC multi-axis linkage processing device of the present invention can respectively perform additive manufacturing and subtractive manufacturing, and can accurately ensure the forming contour and forming accuracy of parts;

2) The utility model can use a water-cooled box to heat-treat the parts when processing the parts, so as to improve the performance of the parts;

3) The utility model takes full advantage of the advantages of arc additive manufacturing, such as high molding efficiency, low manufacturing cost, suitable for parts repair and direct manufacturing, indoor or field operations, etc., and at the same time solves the problem of poor surface quality, low precision and printing only in existing arc additive manufacturing For the problem of simple structural parts, this precision composite method of printing and forming is very suitable for automatic processing of complex mechanical parts with complex surface shapes and internal flow channels, and the technical problems of precisely controlling dimensional accuracy and surface roughness control ;

4) The utility model can not only solve the problem that existing precision machining methods are difficult to automatically process complex shapes (especially complex inner cavity and precision requirements), but also can give full play to the advantages of arc additive manufacturing with high efficiency, low energy consumption, and strong environmental adaptability. , while solving the technical problems of low precision and small size of traditional arc additive manufacturing parts.

Description of drawings

Fig. 1 is a schematic diagram of the composite processing equipment of adding and subtracting materials of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Referring to Fig. 1, a compound processing equipment for adding and subtracting materials includes an online metal arc welding additive manufacturing device 5, a numerically controlled multi-axis linkage processing device 6 and a heat treatment device, wherein,

The online metal arc welding additive manufacturing device 5 includes a welding robot and a welding machine system, and the welding machine system is installed on the welding robot for implementing additive processing;

The multi-axis linkage processing system includes a three-dimensional measuring device 8 and a multi-axis linkage precision machining system. The three-dimensional measurement device 8 is used to measure the profile information of the part 1 and send it to the computer, and the computer obtains the actual shape of the part 1 through the received profile information. The contour is compared with the theoretical three-dimensional model to obtain an error, and the multi-axis linkage precision machining system is used to implement subtractive machining on the part 1, so that the error between the actual contour and the theoretical three-dimensional model is controlled within a set range. Preferably, the three-dimensional measurement device 8 is a three-dimensional measurement scanner

The heat treatment device includes a water-cooled box 9 and a backing plate 2 placed in the water-cooled box 9, the water-cooled box 9 is fixedly installed on the lifting table 4, and the backing plate 2 is used to accept parts formed by additive processing 1. The backing plate 2 is installed in the water-cooled box 9 through the cooling copper block 3. The cooling copper block 3 is provided with a circulating water circuit for cooling the parts 1, and the water-cooled box 9 is provided with a The water inlet 91 and the water outlet 92 connected by the circulating waterway, the temperature control system 7 is set on the backing plate 2, which is used to detect the temperature on the backing plate 2 and send it to the computer, so that the computer can control the The opening and closing of the circulating waterway.

According to another aspect of the present utility model, there is also provided a method for processing using a compound processing equipment for adding and subtracting materials, including the following steps:

(1) Based on the free-form surface process planning algorithm based on the 3D shape characteristics of the damaged part 1 and the model processing information, the surface processing path is used to avoid heat accumulation, and the CAD model of the part 1 to be processed is obtained. Based on the surface layered slicing method, the CAD The model is layered from the bottom layer all the way to the top layer to generate the Part 1 additive machining path;

(2) According to the slice contour of the entity and the direction of the outer normal vector of the triangle at the contour position, the position of the cutting head of the multi-axis linkage precision machining system at this position is obtained according to the principle that the position of the grinding head must be tangent to the triangle surface. Position parameters and local machining paths of the work, and link each local machining path to generate the machining path of the outline of part 1;

(3) According to the additive processing path of part 1 generated in step (1), the welding robot and welding machine system are driven to walk along the slicing path, and the metal wire is melted, and the metal droplet is deposited into a layer; the metal wire after the arc melting is The molten drop is cooled naturally to form a solid blank;

(4) According to the machining path of the contour of part 1 generated in step (2), drive the tool movement of the multi-axis linkage precision machining system, and with the cooperation of the three-dimensional measuring device 8, measure the solid blank generated in step (3) Contour finishing;

(5) After the finish machining is completed, the lifting table 4 drives the solid blank to drop to a height of one layer;

(6) Steps (3) to (5) are repeated until the entire part 1 is processed.

Further, for the structure including cantilever and skirt features in the part 1 to be processed, preformed filling blocks are added, and the above printing path is converted into a robot offline programming language program to drive the nozzle movement of the welding robot.

Further, the thickness of the sliced layer in step (1) is 1mm-20mm, and the melting temperature of the metal wire in step (3) is 1000-2000°C.

The utility model also develops a mobile carrier platform, and puts all the equipment of the online metal arc welding 3D printing system on the mobile carrier platform, so as to meet the requirements for equipment mobility in the field environment.

The printing material adopted in the utility model is made of metal welding wire, and is a raw material for processing shaped parts. The utility model adopts the gas-protected cold welding process of the welding robot, the printing radius can reach 1400mm, the single-layer printing width is 2mm, and the height is 4mm, which is much higher than the traditional laser 3D printing efficiency, and can print larger than the early arc welding printing device Dimensions of parts 1.

The multi-axis linkage precision machining system is used to move the grinding head and the grinding head spindle to the edge of the additive manufacturing system when the welding robot is working, and keep it in a static state. After the welding and printing gun stops working, the feedback from the three-dimensional measuring device 8 With the support, the multi-axis linkage system is used to move the grinding head and the grinding head spindle to the top of the formed part to start the grinding work until the accuracy requirements of the desired part1 are achieved.

For the welding robot, the tool coordinate system and the workpiece coordinate system are first established through teaching, where the workpiece coordinate system coincides with the trajectory coordinate system generated by the program. Secondly, run the robot to a position closer to the printing workpiece through the hand-held operation box (mainly to avoid interference). Then download the program generated on the industrial computer to the robot offline. Finally, the robot selects the transmitted program and executes the corresponding motion.

The idea of this utility model is to divide the part 1 to be formed into several thin layers with a certain thickness (1 mm to 20 mm) along the specified direction, and use the electric arc wire material additive manufacturing technology to process the blank of each layer, and then transform The station uses high-speed grinding technology to grind and finish the layer of blanks into a part 1 entity that meets the requirements of dimensional accuracy and surface roughness, and deposits and manufactures layer by layer until the entire part 1 is processed.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and modifications made within the spirit and principles of the utility model Improvements and the like should all be included within the protection scope of the present utility model.

Claims (2)

1. it is a kind of to increase and decrease material combined-machining equipment, it is characterised in that including online metal arc welding increasing material manufacturing device, numerical control multi-shaft Linkage motion cutting device and annealing device, wherein,

The online metal arc welding increasing material manufacturing device includes welding robot and welder system, and the welder system is arranged on institute Welding robot is stated, for implementing to increase material processing；

The Multi-axis simultaneous machining system includes three-dimensional measuring apparatus and multi-shaft interlocked precision machining system, the three-dimensional measurement dress Put the profile information for measuring part and be sent to computer, the multi-shaft interlocked precision machining system is used to implement part Subtract material processing；

The annealing device includes water cooling box and the backing plate being placed in the water cooling box, and the water cooling box is fixedly mounted on liter On drop workbench, the backing plate is used for undertaking increasing material and processes the part to be formed, and the backing plate is arranged on described by cooling copper billet In water cooling box, it is described cooling copper billet in be provided with circulation waterway, for cool down part, and the water cooling box on be provided with The water inlet and outlet of the circulation waterway connection, on the backing plate temperature control system is provided with.

2. a kind of increase and decrease material combined-machining equipment according to claim 1, it is characterised in that the three-dimensional measuring apparatus are Three-dimensional measurement scanner.