The emerging medium and high-grade building material decoration industry at home and abroad has put forward higher requirements for metal decoration materials, that is, the radius of edge arc of the metal sheet workpiece after bending is as small as possible, and the surface of the metal sheet shaken workpiece has no refraction. The bending section shape of metal sheet workpiece is more complex, which can reflect the designer's fashionable design style.
At present, the traditional forced bending and free bending, and even the three-point bending technology has been unable to bend the attached figure 1 shown in the metal sheet workpiece, that is to say, bending alone with the bending machine bending metal sheet workpiece can not meet the designer's design requirements, can not reach the high-grade decorative class and decorative effect. Thus, a novel bending technology emerges: firstly, v-shaped grooves are made on the sheet metal, and then the sheet metal is bent on the bending machine.
I. Technological characteristics of V-shaped slotting for metal sheet before bending
1. Edge of the workpiece after bending small round, radius, no refraction by the bending process, the edge of the workpiece after bending arc radius and was bending workpiece, the thickness of the proportional relation of sheet metal on the material, after a v-shaped slot of remaining sheet thickness is only half of the original sheet thickness, even smaller, so that when the bending edge of workpiece circular arc radius and multiplying decrease proportionately. And because the v-shaped groove after the remaining plate thickness is small, bending deformation force is small, will not diffuse to affect the unbending area, so the bending of the surface of the metal sheet without refraction. In this way, the hotel, restaurant, restaurant, commercial building, bank, airport and other places in the high-grade decoration of the special requirements.
2. Needed to reduce the sheet metal bending bending force of bending process, the sheet metal bending force and the bending of sheet metal work piece thickness is directly proportional relationship, before bending of sheet metal after a v-shaped slot, makes the rest of the sheet thickness is about half of the original sheet thickness, or less, so that the bending force of sheet metal bending need also decreases, and accordingly makes long sheet metal bending machine in small tonnage also be able to bend. It can reduce equipment investment and save energy.
3. Some special materials can be bent into rectangular tubes with general purpose molds on ordinary bending machines, which cannot be bent into shape on ordinary bending machines, or complex specially designed molds are used to complete the work. However, by controlling the depth of v-groove of the sheet metal, this special bending material can also be made by the general die on the ordinary bending machine. The specific method is: the last bending process of the V-groove remaining sheet thickness control in 0.3 mm, so that this bending process rebound Angle is very small, rectangular tube after forming will not rebound deformation.
4. Folded bend before the positioning of sheet metal bending length sizes of the material are shallow plane v-shaped slot, can be used in the folded bend bend before the predetermined bit length size, and then in the bending machine according to the score good V trough for bending in advance, so that we can ensure the bending length size accurate, can replace behind CNC bending machine function. Of course, the premise is that the positioning accuracy of v-shaped planer must reach ±0.05 mm.
The v-shaped planing equipment for metal sheet materials
Before without special V planed pit equipment, usually used double housing planer to V planed pit sheet metal material, due to the double housing planer is sheet metal by the effective pressure loading device, the sheet metal plane v-shaped groove depth and degree of V groove distance cannot be accurately positioning control, and to start the double housing planer large energy consumption, low effectiveness and various factors, the current V planed pit was carried out on the sheet metal work has been replaced by sheet metal gear slotting machine. The new type of metal sheet gouging machine is designed and manufactured according to the special requirements of middle and high grade decoration industry and elevator manufacturing industry. It can v-shape gouging for stainless steel sheet, iron sheet, copper sheet and other materials. If the new type of metal sheet planer is equipped with some special accessories, it can also be used for grinding, polishing, wire drawing and other work of metal sheet material and profile.