Sheet metal is sometimes also called pull metal, generally some metal sheets are passed throughManual or die stamping to plastically deform it into the desired shapeand dimensions, and can be further formed by welding or a small amount of machiningcomplex parts. Sheet metal is for sheet metal (usually below 6mm)A comprehensive cold working process, including shearing, punching, cutting, folding, welding, splicingThe most notable feature is that the thickness of the same part is the same.Process principles in sheet metal structure design include scope of application, materials, equipmentAnd process equipment, process preparation, etc., under normal circumstances, the sheet metal factory is the most
The three important steps are cutting, punching, and folding.Works designed according to sheet metal structureAnalysis of technical problems, combined with practical problems in optimal design, can haveEffectively improve the designer’s level of sheet metal structure design, ensure the structural designCraftsmanship of the meter.
1 Technological analysis of sheet metal structure design
Sheet metal processing is the processing of sheet metal, and sheet metal parts are sheet metal plusThe main handicrafts of craftsmen, such as the common chimneys, iron stoves andThe shell of the car are all sheet metal parts, and some kitchen utensils made of stainless steel are alsoA type of sheet metal part.Sheet metal parts do not have too many requirements on the structure, mostIt is designed according to the needs of the product. In the design process, try toMeet the requirements of low cost, easy operation and beautiful appearance.sheet metal structureShearing machine, CNC punching machine, bending machine, spot welding machine, uncoiler,Various basic equipment such as deburring machines, the production process is more complicated, and theThe quality requirements of sheet metal parts are extremely high and require quality inspection independent of production.Modern sheet metal processes include: is filament power winding, laser cutting, heavy dutymachining, metal bonding, metal drawing, plasma cutting, precision welding,Roll forming, sheet metal bending, die forging, water jet cutting, finishingWelding, etc. In addition, the design of sheet metal structures does not have a corresponding frame application,
It must be designed according to the different needs of the product, which greatly increases theThe technological difficulty of sheet metal structure design.
2 Process optimization of sheet metal structure design
2.1 Selection process of sheet metal materials
In the design process of sheet metal structure, the selection of sheet metal is extremely important.need.Sheet metal is the main material of some facility shells, which directly affectsWhen it comes to the safety and stability of the entire equipment, scientific and reasonableThe selection of materials not only reduces the time and difficulty of the processing process, but alsoTo a certain extent, the cost of process production is reduced.
First of all, in the selection of materials, it is necessary to ensure the overall dimensions of the raw materialsIt is not the same as the unfolded size of the part.The outside of the sheet metal materials we buyThe shape does not meet the actual requirements, when the unfolded size is consistent with the external sizetime, there will be no excess space, which will result in processed productsThe size produces a large error.
Secondly, there are less than three sheet thickness standards on a structure,This can effectively improve the utilization efficiency of sheet metal materials, in addition, weThe method of thin-plate beading can be used to add high-strength sheet metal structures.engineering design.
Finally, for non-sprayed sheets, we can use decorativeThe surface of the plate, and then strict requirements on the direction of the grain.for undisclosedFor parts, it is necessary to increase the protection in the process of processing, and toWelds are treated effectively. In improving the utilization efficiency of sheet metal materials,We may not use other unadorned materials.
2.2 Design of hole-deficient structure
In the design process of the hole-deficient structure, it is not only necessary to meet the actual needs of the productSeek to adapt, and at the same time follow the principle of simple processing, and in additionAfter the work is completed, the aesthetics and the smooth progress of the follow-up work are guaranteed.
First, make sure that the position of the square hole will not be hit to the bottom of the bend.Stretching the sheet metal material after bending will cause the deformation of the square hole, whichWhen using manual drilling method, it will greatly increase the difficulty of processing.Secondly, for the machining process of screw holes, there are many machining methods that can be implemented.Now, for example: rivet nuts, direct tapping of sheet metal materials, and spot welding screwsmother and so on. For example, when the plate thickness is 1.0mm and the screw hole type is M5,The processing method of spot welding nut can be used; when the plate thickness is 2.0mm, the screwWhen the hole type is M3, the machining method of base tapping can be used. In short,Reasonable processing should be selected for different screw hole sizes and sheet thicknessesWay.
2.3 Design of curved structures
First of all, the requirements of the dead edge, the length of the dead edge and the thickness of the materialThere is a great correlation, in general, the shortest distance of the dead edge is greater than3.5 times the material thickness plus the minimum internal bend in the process prior to the dead edgeradius. Secondly, for the hole edge gap of the bending part, punching should be carried out first.Bending again, the position of the hole should be outside the bending deformation area to avoid the occurrence ofThe phenomenon of hole deformation.Finally, for parts with larger material thickness, weIt is necessary to design the process gap, which can effectively avoid the occurrence ofRaised.
2.4 Design of welded structure
In the design of welded structures, it is best to use the fillet weld method.Spot welds should be designed on relatively minor surfaces to ensure product structure design.The technological effect of the meter.In addition, we have to follow the symmetrical placement of the welds whichA principle, so that there is no intersection between the welds.
In addition, the process optimization of sheet metal structure design also includesThe design of the structure gap, the design of the surface coating, etc., in the process of design and processingDuring the process, we must comply with the relevant requirements of the production process to ensure the design and processing.of craftsmanship.
Through the research on the technological problems of sheet metal structure design, the sheet metal structureThe design process is closely related to the production of craftsmanship, we must rootAccording to the specific needs of the sheet metal structure process, design the sheet metal with craftsmanshipStructural components, thereby reducing cost consumption during processing and improving sheet metal productionquality and efficiency of use.
Sheet fabrication services for mild steel, high strength low alloy (HSLA) steel, cold/hot rolled steel, galvanized steel, stainless steel, aluminum, copper and brass. Capable of fabricating parts up to 12 ft. length and +/-0.001 in. tolerance. Various capabilities include contract manufacturing,custom stamping,edge rolling, forming,top laser cutting, roll bending and welding. Finishing and secondary services such as hardware installation, tapping, deburring, cleaning, heat treating, plating, anodizing and painting available. Sheet Metal Prototype and low to high volume production runs offered. Suitable for commercial/residential architectural, aluminum brake shape parts, wall panel systems, brackets, general flashings, rails, call button plates and ship building component parts.