CN101456031A

CN101456031A - Pass structure optimization method of roller pass system

Info

Publication number: CN101456031A
Application number: CNA2007101720476A
Authority: CN
Inventors: 杨连明; 杨连生
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-11
Filing date: 2007-12-11
Publication date: 2009-06-17

Abstract

The invention provides a method for optimizing a pass structure of a roll pass sequence, which relates to the roll pass formed by rolling stainless steel bar. The invention solves the problems of the prior method that the roll pass is changed frequently, the efficiency is low and the output is low. The invention aims to improve the optimized pass structure, reduce the number of time of changing passes and rollers, and improve the working efficiency. The invention consists of a roll pass sequence and is characterized in that the specification of Phi90 to Phi130mm is divided into three specification assemblies, the share pass specification is increased to 10 mm from 5mm, the pass width is designed according to the upper limit specification, the height is designed according to the lower limit specification, a common elliptical hole is changed into a tangent elliptical hole, namely the radius R of the tangent ellipse is calculated according to the ratio of the radius R of the tangent ellipse to the diameter d of the finished product between 0.65 and 0.75, and then the tangent is made according to the width size of the upper limit specification, the circular arc radius of the circle of the finished hole is equal to (b<2>+4h<2>)/8h, wherein b is the pass width, and h is equal to (the pass height H-roll gap t)/2. The method is used for pass of the roll pass sequence.

Description

Roll pass sequence is optimized the method for pass structure

Technical field

The present invention relates to the roll pass of stainless steel bars roll forming.

Background technology

Roll pass is used for the stainless steel bars roll forming.Ingot blank is heated to 1180 ℃～1200 ℃, being transported to milling train by roller-way is rolled, ingot blank dwindles by passage deformation processing section gradually by some roads roll pass, the rolled piece development length increases, and another part metal produces and spreads, and width increases, it is rolling again to turn over steel, extend again, spread again, rolling through distortion repeatedly, be rolled into needed section configuration steel at last.The selection of roll pass sequence and pass structure directly influence and produce matter raising and roll consumption.

Be divided into φ 90～φ 95, φ 100～φ 105, φ 110～φ 115, φ 120～φ 125,130 5 set of specifications of φ by traditional design method φ 90～φ 130mm, each set of specifications is shared 5mm except that the finished product hole, and each set of specifications all has K separately ₁～K ₅Pass, K ₁Be finished product hole, K ₂Be elliptical aperture before the finished product, K ₃Be omnipotent edging pass for rolling, K ₄Be arc under casing shape hole, K ₅Be upright case hole, be located on three base frameworks of machine row K with epithyrid respectively ₃, K ₄, K ₅Three passes are located on first breast roller K ₂Pass is located on second breast roller, K ₁Last groove is located on the 3rd breast roller.The shortcoming of this method is that the replacing roll pass is frequent, the roll spare part is many, guide and guard are many, efficient is low, yields poorly.

Summary of the invention

The objective of the invention is to solve conventional method and change the shortcoming that roll pass is frequent, the roll spare part is many, guide and guard are many, efficient is low, yield poorly, need improve and optimizate pass structure, reduce and change hole roll change number of times, increase work efficiency.

Technical scheme of the present invention is made of roll pass sequence, it is characterized in that φ 90～φ 130mm specification is divided into 3 set of specifications, the pass specification is shared to be increased to 10mm by 5mm, the pass width is by upper limit specifications design, highly pressing undergage lattice designs, change common elliptical aperture into the tangent line elliptical aperture, is 0.65～0.75 to calculate the oval radius R of tangent line by the ratio R/d of the oval radius R of this tangent line and finished diameter d promptly, make tangent line according to upper limit specification width dimensions then, the arc radius of finished product hole circle=(b ²+ 4h ²)/8h, wherein b is the pass width, h=(pass height H-roll gap t)/2.

The present invention enlarges common range and saves pass roll changing time 40～33% owing to change former 5 set of specifications into 3 set of specifications, has the advantage that improves operating rate, K ₂Tangent line elliptical aperture and K ₁The finished product hole is used, and solving the flat section of large circular steel both sides straight line is arc curve, and the upper limit, middle limit, lower limit type quality generally improve 1～2 grade of dimensional accuracy in the set of specifications.The present invention shows to have the advantage of improving the quality of products by the production practice.

The specific embodiment

The problem that the present invention exists for the pass that solves five set of specifications of φ 90～φ 130mm is improved to three set of specifications with the pass of five set of specifications and optimizes pass structures, reduces and changes hole roll change number of times.Specification is shared to be increased to 10mm by 5mm, i.e. three shared K of specification ₂～K ₅Pass, the pass width is by upper limit specifications design, highly press the design of undergage lattice, when the rolling lower limit small dimension of set of specifications, width leeway is excessive, particularly ellipse is not fully filled, elliptical rolled piece both sides shape is changed, during this elliptical rolled piece feeding finished product hole, the rolled piece instability, finished product tolerance ovality is brought certain influence, must be improved the elliptical aperture structure for this reason, the elliptical aperture structure is improved to the tangent line ellipse by common ellipse, and the tangent line ellipse is calculated the elliptical aperture radius R by undergage lattice height intermediate specification width gauge, makes tangent line according to upper limit specification width dimensions then.It is camber line that this ellipse improves finished product both sides straight line, helps ovality controlling dimension precision and improves.Oval radius R of tangent line and finished steel diameter d have direct relation, generally consider that with the R/d coefficient the greatly oval the ratio of width to height of coefficient is big, be unfavorable for finished product both sides arc curve, and forming the flat section of both sides straight line easily, coefficient is little to be that oval the ratio of width to height is little, helps finished product both sides arc curve and forms.But the too small influence feeding of elliptical rolled piece the ratio of width to height finished product hole, the clamping plate internal stability, general R/d coefficient is 0.65～0.75.Except that elliptical aperture structure influence finished product section configuration, this body structure of finished product hole also has a significant impact the finished steel shape, conventional finished product hole is in the production practical application, and the interior normal appearance of 20 °～25 ° radius of open-angle is bigger 20 than other position round steel diameters, has embodied weak point.Height, width, roll gap size by the finished product hole circle calculate arc radius=(b ²+ 4h ²)/8h, (b is the pass width, and H is a pass height, and h=(H-t)/2, t are roll gap).The finished product hole circle is actually a horizontal size and the height diameter elliptical aperture that is more or less the same.Owing to be elliptical aperture, therefore its center of circle is not in pass height 1/2 position, this pass does not have the center angle, pass is except that Gao Yukuan, and pass is at the difference at 20 °, 40 °, 60 ° diagonal angles of arbitrary orientation 0.05mm only, under the alignment of pass groove upper and lower opening, as long as the face dimensional tolerance can be judged with perpendicular diameter in the straight footpath of card water gaging, whether ovality is qualified, simplified rolling adjustment, and being used of this finished product hole and tangent line ellipse can be brought up to 1～2 grade of GB given size precision.

Claims

1. roll pass sequence is optimized the method for pass structure, constitute by roll pass sequence, it is characterized in that φ 90～φ 130mm specification is divided into 3 set of specifications, the pass specification is shared to be increased to 10mm by 5mm, the pass width is by upper limit specifications design, highly press the design of undergage lattice, change common elliptical aperture into the tangent line elliptical aperture, be 0.65～0.75 to calculate the oval radius R of tangent line promptly by the ratio R/d of the oval radius R of this tangent line and finished diameter d, make tangent line according to upper limit specification width dimensions then, the arc radius of finished product hole circle=(b ²+ 4h ²)/8h, wherein b is the pass width, h=(pass height H-roll gap t)/2.