Why Car Panels Need to Use Four-column Hydraulic Press Machine?Update：2022-11-22 Hits：146
Automobile panels have the characteristics of thin materials, complex shapes, large structural dimensions, high surface quality requirements, and good rigidity. At present, hydraulic press forming is a widely used processing equipment. Four-column hydraulic presses and frame hydraulic presses are widely used in overmolding.Due to the different specifications and processes of automobile panels, the following technical parameters need to be determined for custom-made automobile panel hydraulic presses: pressure tonnage, effective table, opening height, slider stroke, punching force, unloading force and push force, blank holder force, pull Elongation, working speed, etc.
According to the characteristics of the forming process of the automobile cover parts, the main engine of the hydraulic press adopts a three-beam four-column hydraulic press structure, which has the advantages of uniform force on the fuselage, good rigidity, and small deformation; and it can withstand large eccentric loads. It can be used for stamping, stretching, shaping, flanging, trimming, punching, etc. of thin plates for automobile panels. Although there are many forming processes for automobile panels, they can be completed on one piece of equipment. One machine is multi-purpose, which not only saves investment costs, but also Can improve efficiency.
Forming features:
There are many molding processes. The covered stamping process generally requires 4 to 6 processes, of which nearly 10 processes. In order to obtain qualified coverage, it usually needs to be completed through cutting, deep drawing, trimming, flanging, punching and other processes. Deep drawing, trimming, and flanging are the three most basic processes, of which deep drawing is the key process.
Covered stretching is generally not simple stretching, but a compound type of stretching, expansion, bending, etc. No matter how complicated the shape is, stretch molding is usually chosen.
Since the covering part is mostly non-axisymmetric, the surface shape of the non-rotating body is complex, and the deformation is uneven during stretching, which mainly hinders wrinkling and cracking. Therefore, control deformation measures, such as supplementary surface and drawbeads during machining.
Stretching of large panels requires high and stable blankholder forces.
It is easy to stretch and form, and the material is mostly a steel plate with good stamping performance. The surface quality of the steel plate is good and the dimensional accuracy is high.
Why do car covers mostly use four-column hydraulic presses?
The four-column hydraulic press has a simple structure, is economical and applicable, and has a spacious operating space. The main engine is composed of a fuselage, a slider, a mobile worktable, a master cylinder, a hydraulic pad, a lifting and clamping cylinder of a mobile worktable, a stroke limiter, and an upper limit safety locking device, etc. . According to the requirements of the production process and equipment load characteristics, the hydraulic ratio pressure control and the hydraulic ratio flow control can easily realize the required pressure control law and speed control law. load, reduce the stroke and range, and complete the ejection process and stretching process.
Reasonable selection of hydraulic mechanism can ensure the application requirements and processing technology of automobile panels. The product advantages of four-column hydraulic press forming automobile panels.
Good surface quality
Geometric dimensions and surface shapes
Requires a certain stiffness
Good workmanship
