Feeding side rolling wheel assembly of profile part roll bending forming machine tool

Abstract

The invention discloses a feeding side rolling wheel assembly of a profile part roll bending forming machine tool, and belongs to the field of sheet metal profile bending forming. The assembly comprises a feeding rolling wheel, wherein the feeding rolling wheel is fixed on a machine tool frame through a spindle, and constitutes a roll bending forming working surface of profile parts with a clamping rolling wheel assembly and a discharging side rolling wheel assembly, the assembly is characterized in that a material pressing rolling wheel is arranged above the feeding rolling wheel, a central shaft of the material pressing rolling wheel is fixed on the position, on the two sides of the feeding rolling wheel, of the spindle through rolling wheel frames located on the two sides of the material pressing rolling wheel, upper connecting rods and lower connecting rods of the rolling wheel frames are connected through adjustable supporting lead screws, the gap between the material pressing rolling wheel and the feeding rolling wheel is adjusted by rotating the adjustable supporting lead screws through handles, and the gap between the material pressing rolling wheel and the feeding rollingwheel is matched with cross sections of the profile parts. According to the assembly, the material pressing rolling wheel is added, when small-radius-to-large-radius variable roll bending machining ofvariable-curvature profile parts is conducted, the profile parts are always attached to the rolling wheel, the roll bending forming machining precision of the variable-curvature profile parts is effectively improved, by designing different combined wheel sheets, profile roll bending machining with different thicknesses, different sections and any regular curvature variation can be achieved, and the assembly is suitable for roll bending forming of variable-curvature parts of a four-axis roll bending machine tool.

Description

technical field [0001] The invention relates to the field of bending and forming of structural sheet metal profiles, in particular to a feed-side roller assembly of a rolling-bending and forming machine tool for profile parts. Background technique [0002] In the design of aircraft, in order to achieve the requirements of lightweight structure, long life and high reliability, a large number of sheet metal profile parts are used. Profiles have the characteristics of light weight and high strength, and are widely used in the manufacture of skeleton parts in the aviation, automobile, and shipbuilding industries. [0003] The frame edge type material part is the main force-bearing part of the aircraft skeleton, and it is also the frame that ensures the semi-monocoque structure of the aerodynamic shape of the fuselage. Its forming accuracy and quality directly affect the aerodynamic shape and strength of the aircraft. Traditional roll-bending machine tools are manually controlle...

AI Technical Summary

Problems solved by technology

However, during the roll forming process of variable curvature profile parts, the curvature radius of profile parts does not change uniformly. When encountering the transition from a small radius arc segment to a large radius arc segment, as the roll bending radius increases, The positions of the rollers on the inlet and outlet sides on both sides need to be adjusted accordingly. At this time, the processed profile parts are subject to plastic yield and cannot have a large elastic recovery. The separation of the processed profiles and the inlet and outlet side rollers occurs. The roll bending machine tool does not have an abutment device that can keep the formed profile in close contact with the bending rollers on the inlet and outlet sides when the curvature radius of the rolled profile part is from small radius to large radius, so that the accuracy of the formed shape of the profile part appears. Larger error, so the CNC four-axis roll bending machine tool in the prior art can only realize the roll bending process of profile parts whose curvature radius changes from large to small

Images