Machines de pliage de tôles en acier inoxydable fabriquées en Chine Usine AHYW Yawei
L'acier inoxydable a un large éventail d'utilisations et est un matériau courant dans notre vie, comme-les fenêtres antivol, les cabines d'attente, les étagères, etc. En raison de la limite d'élasticité élevée, de la dureté élevée et de l'effet de durcissement à froid important de l'acier inoxydable, il existe certaines caractéristiques évidentes lors du pliage de tôles en acier inoxydable.
Lorsque vous pliez des profilés en tôle d'acier inoxydable, vous devez connaître les facteurs d'acier inoxydable, puis commencer à plier l'acier inoxydable :
L'acier inoxydable SUS 304 a une limite d'élasticité élevée et une résistance à la traction élevée, l'effet de durcissement à froid est évident. Les caractéristiques du processus de pliage des plaques en acier inoxydable 304 sont que la conductivité thermique est pire que l'acier à faible teneur en carbone ordinaire et que son allongement est faible, ce qui entraîne la force de déformation requise de la plaque.
Compared with mild steel sheet , the springback tendency of stainless steel sheet is stronger than that of carbon steel, and its elongation is also lower than that of carbon steel, so the bending angle R of stainless steel workpiece is higher than that of carbon steel when bending. Otherwise, cracks may occur when bending.
SUS 304 stainless steel has high hardness and significant cold work hardening effect, press brake tooling material must be with heat treatment hardness above 60HRC should be selected when selecting press bending tools. Its surface roughness is an order of magnitude higher than that of carbon steel press bending tools.
According to the above characteristics, generally speaking, under the unit size, the thicker of stainless steel plate, the greater the bending force required, and when increase bending sheet plate thickness, the margin of bending force should be stronger when selecting bending equipment. When bending higher tensile strength sheet plate, the lower the elongation. Also required higher bending force and smaller bending angles.
According to the actual bending operation, the unfolding size of one bending workpiece is the addition of right angle edges minus two times of plate thicknesses, which can fully meet the requirements of design accuracy. According to experience, the formula to calculate the unfolding amount can simplify the calculation process and greatly improve the production efficiency. The greater the yield strength of the material is, the stronger the elastic recovery is. In order to obtain the 90 degree angle of the bending part, the smaller the angle of the pressing knife needs to be designed. Compared with carbon steel, the bending angle of 304 stainless steel plate with the same plate thickness is large, which requires great attention. It will generate bending cracks, which will affect the workpiece strength of stainless steel materials.
When bending, you need to confirm the tool ing and groove used in bending according to the size and material thickness on the drawing. Avoiding the deformation caused by the collision between the product and tools, you need to choose the correct top punch and lower dies(Sometiems bending one sheet profiles, maybe you need different top punch and bottom dies), bottom dies must be determined by the sheet thickness of profiels, Then you must be determine the sequence of bending, different sheet bending profiels has different bending sequence, must most of profiles bending is first inside and then outside, first small and then large, first special and then ordinary. For the workpiece with edge to be crushed, firstly bend the workpiece to 30 degree - 40 degree , and then press the workpiece with flattening press brake tooling system.
Tout dobut pour les applications de pliage de tôles en acier inoxydable, envoyez un e-mail à l'usine de porcelaine AHWY Yawei pour plus d'informations et de solutions.
