Label：Sheet Metal Fabrication, Bending, Forming Molds
Apr 23, 202113040
Sheet metal is an important part of mechanical manufacture, and it is indispensable in our production and life.
At present, many electrical appliances, instruments, cases, etc. are miniaturized and lightweight, and many things are customized. How to quickly meet various needs is the problem that we have to solve in sheet metal processing. Sheet metal parts are getting smaller and smaller, and many parts have reached the processing limit of mechanical processing equipment. How to improve sheet metal processing techniques, let us analyze from the following aspects.
The three aspects of design, technique, and production must be closely integrated and coordinated with each other. Only standardization and standardization can make processing more convenient and efficient. The design and process must satisfy the manufacturability of the design. Since our processing equipment is relatively fixed and has limitations in many aspects, many processings are restricted before the processing equipment is upgraded. Only when designers and technologists understand the processing limits of the equipment can they avoid the situation of modification while processing.
The miniaturization of the chassis structure makes the parts smaller, and the ventilation holes are more dense. Many mounting holes have been laid out in the bending and tensile deformation zone of the sheet. The tensile deformation of the sheet during bending will affect the hole, causing the hole to deform, affecting the shape and size of the part. The product will not be able to meet the design and use requirements. Under the premise that the design can no longer be changed, we need to solve it from the technological aspect.
First of all, we can first punch the holes in the stretched position into small holes or point holes, and then expand the drilling after bending. In this way, the design and use requirements can be met.
However, multiple processes will bring the problem of repeated positioning. Completed in one process, not only can ensure quality, but also improve efficiency, reduce production costs, and shorten the delivery cycle of parts.
How to solve this problem, we need to understand the working principle of sheet metal bending, the use of bending molds, the shape of the upper bending mold, the rounded corners, the width of the V-shaped lower mold and the bending limit size. In order to make the bending size as small as possible, we need to use a smaller V-groove and a smaller round corner bending upper die under the premise of ensuring that the bending pressure is within the safe pressure range.
The use of sheet metal as the raw material can ensure the firmness and strength of the chassis. However, the density of the sheet metal is large, and if the aluminum plate with a small density is used, sometimes the strength of the chassis cannot be guaranteed.
At this time, we can strengthen the ribs on the thin steel plate, or increase the strength of the parts through the bending of aluminum plates, so as to solve the contradiction between the lightweight and strong chassis.
Reasonable use of special forming molds can comprehensively improve the quality and efficiency of parts, and reduce production costs.
Commonly used special molds include dot molds, counterbore molds, hole turning molds, bridge molds, forming self-tapping molds, shear positioning molds, letter molds, multi-hole molds, knockout molds, etc.
Dotting molds can be used to mark the center point holes that will deform during bending, to avoid errors caused by subsequent processing and marking positioning, resulting in defective products or waste products;
The counterbore mold can reduce the manual workload of the fitter, and the processing consistency is better, and the efficiency is higher than the counterbore of the drilling machine;
The bridge mold is suitable for positioning or as a board slot for a circuit board, which is very convenient;
The use of forming self-tapping dies can reduce the workload of fitter and improve efficiency, suitable for relatively large threads;
The use of shear positioning molds can improve the positioning accuracy and efficiency of subsequent welding or assembly;
Letter molds can be marked on parts. It can be used as a batch number or identification number to improve the assembly efficiency of parts, etc.;
The multi-hole molds can punch multiple holes at one time, which greatly improves the processing efficiency;
The use of knockout molds provides convenience for matching or subsequent assembly. Avoid inconsistencies in follow-up drilling and affect the appearance of the product.
Sheet metal fabrication is closely related to modern production. Today, when product design is rapidly updated, we must conduct in-depth research on sheet metal fabrication principles and processes, so that JRPanel sheet metal fabrication technique develops, bringing better service to the customers.