Design method of welding fixture

Abstract

The invention discloses a design method of a welding fixture, which comprises the following steps of: in the early stage of welding fixture design, fully considering the problems of welding thermal deformation, uneven stress distribution and the like caused by a welding process, scientifically designing a reversible deformation position and deformation, and designing a clamping point position, a clamping area, a clamping force and the like at the same time. According to the design method of the welding clamp, the design efficiency of the welding clamp can be greatly improved, one-stop design and manufacturing can be achieved, and resource waste caused by repeated trial and error from design to manufacturing is avoided.

Description

Technical Field

[0001] The invention relates to a design method for a welding fixture. Background Art

[0002] Welding, also known as fusion, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure.

[0003] Most welding processes, such as arc welding, laser welding, electron beam welding, and resistance welding, require welding fixtures to clamp the workpieces for smooth implementation of the welding process. However, the design of welding fixtures requires trial and error from design to manufacturing, which is time-consuming and laborious. Summary of the invention

[0004] In order to solve the defects of the prior art, the present invention provides a design method for a welding fixture, including: in the early stage of designing the welding fixture, fully considering the welding thermal deformation, uneven stress distribution and other problems caused by the welding process, scientifically designing the anti-deformation position and deformation amount, and at the same time designing the clamping point, clamping area and clamping force.

[0005] Preferably, it also includes: simulating the temperature field, stress field and deformation field for most welding processes such as arc welding, laser welding, electron beam welding and resistance welding, so as to assist in optimizing the design of welding structure, process parameters, welding sequence and welding fixtures.

[0006] Preferably, it also includes: fully considering the structure, material, strength requirements, etc. of the welding workpiece during design, and solving the influence of factors such as welding process selection, groove form design, temperature, stress and strain, etc.

[0007] Preferably, it also includes: using local high-precision thermal stress simulation technology to achieve accurate calculation of key data such as temperature, stress and strain, and realize welding process analysis based on the simulation model.

[0008] Preferably, it also includes: performing thermo-elastoplastic calculation on the welding workpiece to obtain accurate residual plastic strain, and at the same time ensuring the dual conservation of plastic strain load and load moment, and then mapping it to the overall structure for elastic calculation to predict the stress deformation of the welding workpiece; while ensuring high calculation accuracy, the algorithm greatly improves the calculation efficiency and solves the long-standing international problem of balancing calculation efficiency and accuracy; at the same time, the algorithm also realizes the full process simulation of welding-heat treatment, that is, the welding residual stress can be output as the input of the subsequent heat treatment process simulation, so as to more accurately calculate the heat treatment simulation results.

[0009] The advantages and beneficial effects of the present invention are: providing a design method for a welding fixture, which can greatly improve the design efficiency of the welding fixture, realize one-stop design and manufacturing, and avoid the waste of resources in trial and error from design to manufacturing. DETAILED DESCRIPTION

[0010] The specific implementation of the present invention is further described below in conjunction with the examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0011] The technical solutions specifically implemented in the present invention are as follows: A method for designing a welding fixture, comprising: In the early stage of welding fixture design, the problems of welding thermal deformation and uneven stress distribution caused by the welding process are fully considered, the anti-deformation position and deformation amount are scientifically designed, and the clamping point, clamping area and clamping force are designed at the same time; For most welding processes such as arc welding, laser welding, electron beam welding, and resistance welding, simulation of temperature field, stress field, and deformation field is performed to assist in optimizing the design of welding structure, process parameters, welding sequence, and welding fixtures; When designing, the structure, material, and strength requirements of the welding workpiece are fully considered, and the influence of factors such as welding process selection, groove form design, temperature, and stress and strain are also addressed; Through local high-precision thermal stress simulation technology, accurate temperature, stress and strain and other key data can be calculated, and welding process analysis based on simulation models can be realized; Thermo-elastoplastic calculations are performed on the welding workpiece to obtain accurate residual plastic strain, and at the same time, the plastic strain load and load moment are conserved, which is then mapped to the overall structure for elastic calculation to predict the stress and deformation of the welding workpiece. This algorithm greatly improves the calculation efficiency while ensuring high calculation accuracy, solving the long-standing international problem of balancing calculation efficiency and accuracy. At the same time, the algorithm also realizes the full-process simulation of welding and heat treatment, that is, the welding residual stress can be output as the input of the subsequent heat treatment process simulation, thereby more accurately calculating the heat treatment simulation results.

[0012] The design method of the welding fixture of the present invention can greatly improve the design efficiency of the welding fixture, realize one-stop design and manufacturing, and avoid the waste of resources in trial and error from design to manufacturing.

[0013] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for designing a welding fixture, characterized in that: include: In the early stage of welding fixture design, the welding thermal deformation and uneven stress distribution caused by the welding process are fully considered, the anti-deformation position and deformation amount are scientifically designed, and the clamping point, clamping area and clamping force are designed at the same time.

2. The method for designing a welding fixture according to claim 1, characterized in that: Also includes: For arc welding, laser welding, electron beam welding and resistance welding processes, the temperature field, stress field and deformation field are simulated to assist in optimizing the design of welding fixtures.

3. The design method of a welding fixture according to claim 1, characterized in that: Also includes: During the design, the structure, material and strength requirements of the welding workpiece are fully considered, while the influence of welding process selection, groove form design, temperature and stress-strain factor are addressed.

4. The method for designing a welding fixture according to claim 1, characterized in that: Also includes: Through local high-precision thermal stress simulation technology, accurate temperature, stress and strain calculations can be achieved, and welding process analysis based on simulation models can be realized.

5. The method for designing a welding fixture according to claim 1, characterized in that: Also includes: Perform thermal elastic-plastic calculations on the welded workpiece to obtain accurate residual plastic strains, and simultaneously ensure the conservation of plastic strain loads and load moments, and then map them to the overall structure for elastic calculations to predict the stress and deformation of the welded workpiece; This algorithm greatly improves the computing efficiency while ensuring high calculation accuracy, solving the long-standing international problem of balancing calculation efficiency and accuracy. At the same time, the algorithm also realizes the full-process simulation of welding and heat treatment, that is, the welding residual stress can be output as the input of the subsequent heat treatment process simulation, so as to calculate the heat treatment simulation results more accurately.