CN-122021050-A - Arc additive curved steel node process design and manufacturing integration method

CN122021050ACN 122021050 ACN122021050 ACN 122021050ACN-122021050-A

Abstract

The invention relates to an arc additive curved steel node process design and manufacturing integration method, which comprises the following steps of curved steel node model processing; the curved surface steel node process design and the curved surface steel node additive manufacturing. The arc additive manufacturing design-process-manufacturing-evaluation integrated technical solution integrating manufacturing constraint is constructed according to the problems of model optimization setting, process design of different characteristic parts and material addition and flaw detection evaluation existing in the process of manufacturing by adopting WAAM technology of the existing curved steel nodes, a strategy combining integral printing of a main body part and independent printing of a tailor-welded part is adopted, different process designs and path strategies are adopted for the main body part, the main body part and the tailor-welded part, printing areas are divided according to geometric characteristics and structural complexity of the curved steel nodes, ultrasonic flaw detection is carried out at intervals of a certain height, the forming quality of the main body part in the printing process is guaranteed, and residual stress is eliminated through heat treatment.

Inventors

WANG ZHEN
ZHAO YANG
YE JUN
YANG YUMING
LI DONGYANG
LI YAN
YANG XUELIN
Qu Haochuan
XU LONGHUA

Assignees

绍兴文理学院
中建三局集团(浙江)有限公司
中建三局钢构科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. An arc additive curved steel node process design and manufacturing integration method is characterized by comprising the following steps: S1, curved surface steel node model processing, namely obtaining curved surface steel nodes through topology optimization, wherein the curved surface steel nodes are divided into a main body part and a tailor-welded part; s2, designing a curved steel node process, namely adopting a strategy of combining integral printing and independent printing, wherein a main body part is integrally printed, and a splice welding part is independently printed; S3, manufacturing curved surface steel node additive materials, namely adding materials layer by layer from the bottom of the main body part, performing ultrasonic flaw detection at intervals, adding materials without layers in a Z-shaped path mode, performing welding and splicing after the main body part and the splice welding part are subjected to additive materials, and performing integral thermal stress treatment.
2. The arc additive curved steel node process design and manufacturing integration method of claim 1, wherein S1 comprises: S11, model optimization, namely, slope is supplemented to the large-angle suspension position, allowance is arranged at the contact position of the bottom of the radial main pipe of the main body part and the substrate, allowance is arranged at the free positions of the contact position of the bottom of the splice welding part and the substrate and the top of the splice welding part, and allowance is arranged on the surfaces of the inner wall and the outer wall of the thin-wall part of the curved surface steel node; And S12, arranging a base plate, namely arranging the base plate of the main body part and the splice welding part, punching holes on the base plate, and locking and fixing the base plate on the printing platform by adopting bolts.
3. The arc additive curved surface steel node process design and manufacturing integration method according to claim 2, wherein in S2, according to the appearance structural characteristics of the model, a corresponding process path is set, the model is imported into the special software for additive, and the additive path is simulated.
4. The arc additive curved steel node process design and manufacturing integration method of claim 3, wherein S2 comprises: s21, designing a regular cylinder process, namely stacking and forming a regular cylinder part of the main body part by adopting a radial printing path; s22, designing a complex cavity process, namely adopting a circumferential edge sealing and a sectional radial path for the complex cavity part of the main body part, and adopting a manual edge sealing mode to repair and re-weld when printing is interrupted; S23, designing a non-overhanging cavity process, namely, printing a non-overhanging cavity part of the main body part by adopting a unidirectional process path direction for the case of separating sections at two sides and printing a radial process path direction for the case of integrally and continuously cutting the sections without arranging additional supporting materials; And S24, carrying out process design on the cable-containing Kong Er plate, namely stacking and forming the cable-containing Kong Er plate part of the main body part by adopting a unidirectional printing path along the thickness of the lug plate.
5. The integrated process design and manufacturing method for the arc additive curved steel node, according to claim 4, is characterized in that in S24, a cushion plate is arranged for local support in a large overhanging area at the top of a cable hole, and local polishing is carried out after printing of local overhanging parts containing thickness boundaries at two sides of the cable Kong Er plate is completed.
6. The integrated process design and fabrication method of arc additive curved steel nodes according to claim 5, wherein four process designs in S21-S24 are used alone or in combination for metal part cases with corresponding geometric features.
7. The arc additive curved steel node process design and manufacturing integration method of claim 6, wherein S3 comprises: s31, preparing equipment, namely setting a plurality of arc additive printing equipment for printing the main body part and the tailor-welded parts; s32, performing additive manufacturing and flaw detection, namely performing additive manufacturing of a main body part upwards from a bottom cylinder on a substrate, performing ultrasonic flaw detection and spot check on the interval height in the additive manufacturing process, performing additive manufacturing of a tailor-welded part by the main body part, wherein the tailor-welded part comprises a cylinder and a tool lug plate, printing the cylinder and the tool lug plate on the substrate, and performing ultrasonic flaw detection and spot check after the tailor-welded part is printed; s33, assembling and heat treating the parts, namely performing additive forming on the main body part and the splice welding part, splicing by adopting TIG welding and performing heat stress treatment.
8. The process design and manufacturing integration method for arc additive curved steel nodes according to claim 7, wherein in S32, the substrate is polished before the curved steel nodes are added, the whole substrate is preheated before the curved steel nodes are added, each layer is cleaned and observed for defects between layers during the material adding process, the slicing times are increased, the dry elongation is kept consistent, and the filling interval and the welding parameters are printed according to a Z-shaped path and dynamically adjusted.
9. Arc additive manufacturing equipment for use in an integrated method according to any of claims 1-8, comprising: the arc additive printing equipment is used for printing the main body part and the tailor-welded parts; the turning and milling composite equipment is used for processing parts and ends of the main body part and the splice welding part; The heating equipment is used for preheating and preserving heat of the substrate and the added material part; the angle grinder is used for cleaning the layers during material adding; a three-dimensional scanner for size detection; The ultrasonic flaw detection equipment is used for detecting flaws in the printing process of the main body part and detecting flaws in the splicing weld joints of the formed structural parts; the X-ray nondestructive testing equipment is used for carrying out flaw detection on welding seams of the formed structural members and carrying out flaw detection on the defects of the test blocks along with the furnace.
10. Curved steel node, characterized in that it is obtained by the integration method according to any one of claims 1-8.

Description

Arc additive curved steel node process design and manufacturing integration method Technical Field The invention belongs to the technical field of structural engineering, and particularly relates to an arc additive curved steel node process design and manufacturing integration method. Background Due to the requirements of curved surface and light weight of building steel nodes, the topology optimization method has obvious advantages in the field of engineering structures in recent years. The topological optimization of minimizing mass and maximizing rigidity can effectively realize the optimized modeling of the steel nodes corresponding to the requirements. The existing curved surface steel node has the problems of model optimization setting, process design of different characteristic parts, material addition, flaw detection evaluation and the like when being manufactured by adopting an arc additive manufacturing technology. According to the geometric characteristics of the inner surface and the outer surface of the curved surface steel node, different part structures have various complex conditions such as regular geometric shapes, complex modeling shapes, overhang structures, local open pore structures and the like, and different path planning and process design methods are correspondingly adopted for the different part structures. Therefore, how to construct a set of complete technical schemes facing curved steel nodes and integrating process design and manufacturing integration is important. In view of printing cost and printing efficiency, the curved steel node can be further optimally divided into a main body part and a splice welding part while the integral mechanical property of the curved steel node is not weakened. Thus, how to design different process solutions for different component types is another important factor. In summary, it is necessary to research an arc additive curved steel node process design and manufacturing integration method to realize the model optimization setting of curved steel nodes under arc additive constraint, process designs of different feature parts, additive and flaw detection evaluation and application designs. Disclosure of Invention The invention aims to overcome the defects in the prior art and provides an arc additive curved steel node process design and manufacturing integration method. In a first aspect, a manufacturing integration method of arc additive curved steel node process design is provided, including: S1, curved surface steel node model processing, namely obtaining curved surface steel nodes through topology optimization, wherein the curved surface steel nodes are divided into a main body part and a tailor-welded part; s2, designing a curved steel node process, namely adopting a strategy of combining integral printing and independent printing, wherein a main body part is integrally printed, and a splice welding part is independently printed; S3, manufacturing curved surface steel node additive materials, namely adding materials layer by layer from the bottom of the main body part, performing ultrasonic flaw detection at intervals, performing welding and splicing after adding materials of the main body part and the splice welding part according to a Z-shaped path mode, and performing integral thermal stress treatment. Preferably, S1 includes: S11, model optimization, namely, slope is supplemented to the large-angle suspension position, allowance is arranged at the contact position of the bottom of the radial main pipe of the main body part and the substrate, allowance is arranged at the free positions of the contact position of the bottom of the splice welding part and the substrate and the top of the splice welding part, and allowance is arranged on the surfaces of the inner wall and the outer wall of the thin-wall part of the curved surface steel node; And S12, arranging a base plate, namely arranging the base plate of the main body part and the splice welding part, punching holes on the base plate, and locking and fixing the base plate on the printing platform by adopting bolts. Preferably, in S2, a corresponding process path is set according to the shape and structure characteristics of the model, the model is imported into the software dedicated for additive, and the additive path is simulated. Preferably, S2 includes: s21, designing a regular cylinder process, namely stacking and forming a regular cylinder part of the main body part by adopting a radial printing path; s22, designing a complex cavity process, namely adopting a circumferential edge sealing and a sectional radial path for the complex cavity part of the main body part, and adopting a manual edge sealing mode to repair and re-weld when printing is interrupted; S23, designing a non-overhanging cavity process, namely, printing a non-overhanging cavity part of the main body part by adopting a unidirectional process path direction for the case of separating sections at two sides and print