Prestressed clamp based on stirring friction welding and capable of preventing workpiece deformation
A friction stir and prestressing technology, applied in the field of engineering and manufacturing, can solve problems such as welding bending deformation of workpieces, and achieve the effect of solving welding bending deformation and avoiding upward displacement.
Pending Publication Date: 2018-07-31
DALIAN UNIV OF TECH
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The problem to be solved by the present invention is how to design a prestressed fixture based on friction stir welding to prevent deformation of the workpiece to solve the problem of bending deformation of the workpiece during friction stir welding
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.
[0020] Prestressed fixtures to prevent workpiece deformation based on friction stir welding. Such as figure 1 Shown is the welding pressurization process. for ease of expression figure 1 Only the fixture on the second workpiece 12 is drawn in the figure, in fact, the same fixture is installed on the first workpiece 9, and the fixture on the workpiece 12 is arranged symmetrically with the weld seam 10 as the axis of symmetry. Before performing friction stir welding, the processed first workpiece 9 and the second workpiece 12 are spliced together so that the two are seamlessly connected. After the butt joint is completed, the pressure plate 4 is symmetrically placed on the first workpiece 9 and the second workpiece 12 along the weld 10; then the positioning base 5 at the bottom of the fixture (triangular...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a prestressed clamp based on stirring friction welding and capable of preventing workpiece deformation. The top end of a triangular truss serves as the supporting end of a jack; in order to guarantee the stability of the triangular truss, a bottom crossbeam is designed at the bottom to maintain the structural integrity of an original triangle; an open hole is designed in the middle of the bottom crossbeam, the hole is in a circular table shape, the section of the hole is trapezoidal, and it is guaranteed that a push rod of the jack can apply secondary prestress to a pressing plate below the bottom crossbeam; the front end of the push rod of the jack adopts the circular table design, it is guaranteed that force applied to the pressing plate cannot generate too largestress concentration, and the force-bearing area is enlarged to a certain extent; the pressing plate is stored between two base arches and located under the bottom crossbeam, and separate design is adopted; and a metal gasket has the effect that the situation that the middle of the pressing plate generates large upward displacement after bases are fixed through positioning screws due to excessively thick to-be-welded pieces is avoided. The knowledge of subjects such as mechanics and machinery are combined, thus the problem of welding bending deformation of workpieces after stirring friction welding is solved, and the workpiece quality is improved.
Description
technical field [0001] The invention belongs to the technical field of engineering manufacturing, and in particular relates to a prestressed clamp for preventing workpiece deformation based on friction stir welding. Background technique [0002] At present, friction stir welding technology has begun to be applied in various fields, but due to the relatively thin thickness of some welded workpieces, if conventional methods are used to pressurize and fix them, it will cause saddle-shaped welding bending deformation of the workpiece along the direction of the weld seam. Usually, the largest deformation of welding bending deformation occurs in the middle part of the workpiece, which is caused by too little prestress exerted by the pressure plate on the middle part of the workpiece. The common method mentioned here refers to placing the long pressure plate on the surface of the workpiece along the direction of the weld and keeping a certain distance from the weld, and then pressu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B23K20/12B23K20/26
CPCB23K20/127B23K20/26
Inventor 张昭苑红磊谭治军姚欣欣葛芃李健宇亢战
Owner DALIAN UNIV OF TECH