CN107552614B - Flexible bending forming equipment and forming method for section bar - Google Patents

Abstract

The utility model provides a flexible bending forming equipment of section bar, detects functional module and PLC control module including shaping functional module, crookedness, and shaping functional module is used for having the reciprocal transport function to section bar bending forming, and the crookedness detects functional module and is used for the local camber of real-time detection section bar, and PLC control module is used for the controlgear operation. The invention has the following advantages; 1. compared with the traditional stretch bending forming, the machining allowance is less, the material is saved, 2, the bending degree is not needed to be corrected manually after forming, the labor intensity is low, 3, more than 70% of traditional stretch bending forming parts of the airplane sheet metal can be formed by the equipment, a special stretch bending die is not needed to be manufactured, 4, the forming efficiency is high, 5, the inherent characteristic of the forming part material is not needed to be considered, and the method is superior to the existing compensation bending mode according to the material parameters.

Description

Flexible bending forming equipment and forming method for section bar

Technical Field

The invention belongs to the field of mechanical processing, in particular to airplane sheet metal processing, and the forming of extruded aluminum profiles and sheet metal bending profiles; general sheet metal processing and the like, in particular to a flexible bending forming device and a flexible bending forming method for sectional materials.

Background

The traditional airplane sheet metal part profile is generally formed by adopting a stretch bender, but has the following problems: 1. usually, two ends are respectively provided with 300mm of allowance, so that the material utilization rate is not high; 2. after actual stretch bending forming, springback is inconsistent with a theoretical bending curve, and then manual correction forming is needed; 3. the mould is required to be adopted for forming, so that the processing cost is high; 4. the period from the manufacture of the die to the forming of the part is long.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a flexible bending forming device and a flexible bending forming method for a section.

The technical scheme includes that the flexible bending forming equipment comprises a forming function module, a bending degree detection function module and a PLC control module, wherein the forming function module is used for bending and forming the section and has a reciprocating conveying function, the bending degree detection function module is used for detecting local curvature of the section in real time, and the PLC control module is used for controlling the equipment to operate.

The two curvature detection functional modules are respectively positioned on two sides of the forming functional module.

The forming functional die module is formed by rolling.

A flexible bending forming method for a section comprises the following steps:

step 1: placing the section bar on a forming device, specifically placing one end of the section bar on a port of a forming functional module;

step 2: the PLC control module controls material conveying and bends the section bar;

and step 3: the curvature detection functional module detects the curvature of the formed section in real time to obtain a section bending curve after the first forming;

and 4, step 4: comparing the bending curve with a design value to be achieved, and determining the curvature of the second forming;

and 5: the PLC control module controls the forming functional module to reversely run, and the section is bent for the second time according to the curvature of the second forming;

step 6: and (5) circulating the steps from 3 to 5, and finally obtaining the curvature and the design value after the forming, namely finishing the bending forming of the section.

Has the advantages that: the invention adopts numerical control and innovatively adopts a finite element principle, and adopts a method of repeated cycle forming, detection, calculation processing and theoretical difference calculation to modify the next curvature and then form until the theoretical curve of the part is met. The invention has the following advantages; 1. compared with the traditional stretch bending forming, the machining allowance is less, the material is saved, 2, the bending degree is not needed to be corrected manually after forming, the labor intensity is low, 3, more than 70% of traditional stretch bending forming parts of the airplane sheet metal can be formed by the equipment, a special stretch bending die is not needed to be manufactured, 4, the forming efficiency is high, 5, the inherent characteristic of the forming part material is not needed to be considered, and the method is superior to the existing compensation bending mode according to the material parameters.

Drawings

FIG. 1 is a schematic view of the process of the present invention, wherein 1: section bar, 2: forming functional module, 3: and a curvature detection function module.

Detailed Description

The invention is described in further detail below with reference to the drawings.

The utility model provides a flexible bending equipment of section bar, includes shaping functional module 2, crookedness detection functional module 3 and PLC control module, shaping functional module 2 is used for 1 bending to the section bar and has reciprocal transport function, and crookedness detection functional module 3 is used for the local camber of real-time detection section bar, and PLC control module is used for the controlgear operation.

The two curvature detection functional modules are respectively positioned on two sides of the forming functional module.

The forming functional module can adopt the forming modes such as roll forming, local bending forming and the like.

Referring to the attached figure 1 of the specification, the flexible bending forming method of the section comprises the following steps:

step 1: placing the section bar 1 on a forming device, specifically placing one end of the section bar 1 at the port of a forming functional module 2;

step 2: the PLC control module controls material conveying and bends the section bar;

and step 3: the curvature detection functional module 3 detects the curvature of the formed section in real time to obtain a section bending curve after primary forming;

and 4, step 4: comparing the bending curve with a design value to be achieved, and determining the curvature of the second forming;

and 5: the PLC control module controls the forming functional module to reversely run, and the section is bent for the second time according to the curvature of the second forming;

step 6: and (5) circulating the steps from 3 to 5, and finally obtaining the curvature and the design value after the forming, namely finishing the bending forming of the section.

This equipment mainly contains section bar bending and shaping functional module, crookedness detects functional module and camber calculation system, and adopt singlechip PLC control, adopt the finite element principle, divide the whole little unit into certain digifax quantity, every little unit can have the bending and shaping functional module to take shape, there is the crookedness to detect functional module and detects the camber, the shaping functional module has reciprocal transport function simultaneously, the material is reciprocal to be carried and the crookedness of taking shape, the circulation bending takes shape, until finally accord with the theoretical crooked curve of part.

Claims (1)

1. The flexible bending forming method of the section bar is characterized by comprising the following steps:

step 1: placing the section bar on a forming device, specifically placing one end of the section bar on a port of a forming functional module;

step 2: the PLC control module controls material conveying and bends the section bar;

and step 3: the curvature detection functional module detects the curvature of the formed section in real time to obtain a section bending curve after the first forming;

and 4, step 4: comparing the bending curve with a design value to be achieved, and determining the curvature of the second forming;

and 5: the PLC control module controls the forming functional module to reversely run, and the section is subjected to second-time curvature forming according to the curvature of the second-time forming;

step 6: and (5) circulating the steps from 3 to 5, and finally obtaining the curvature and the design value after the forming, namely finishing the bending forming of the section.

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