CN105215239A - The method for designing of a kind of groove oblique endoporus ring rolling blank dimension - Google Patents

Abstract

A method for designing for groove oblique endoporus ring rolling blank dimension, belongs to ring rolling design field, it is characterized in that comprising following design procedure: 1) determine that rolling compares λ; 2) the volume V of the oblique endoporus ring of groove is calculated; 3) adopt enclosed pass rolling, the annular blank rolling starting section shape of design is rectangle, blank axial height H before rolling ₀equal ring height H after rolling; 4) according to plastic history constancy of volume principle, design square-section all the other sizes of annular blank, comprise D ₀, d ₀.Design process of the present invention is reasonable, blank dimension accurate, is designed to the realization that square-section blank is conducive to casting process, improves production efficiency, reduce the waste of the energy and material.

Description

The method for designing of a kind of groove oblique endoporus ring rolling blank dimension

Technical field

The invention belongs to ring rolling design field, be specifically related to the method for designing of a kind of groove oblique endoporus ring rolling blank dimension.

Background technology

Groove ring refers to the special-shaped ring of outer surface or inner surface belt fluted (groove depth accounts for more than 1/5th of wall thickness), the depth of groove of ring shown in Fig. 1 accounts for 1/2nd of wall thickness, and endoporus and groove outer have certain gradient, geomery is complicated.The Key basic parts such as Double flange track roller body, concrete mixer truck supporting guide, bilateral flange and smash valve body that engineering field is conventional all belong to groove ring, higher to the requirement of its dimensional accuracy, performance quality and structure stability.The groove of the type ring is difficult to by die forging direct forming, the simple prefabricated blank of normally first die forging is shaped, groove spot size is processed again through machine cut, said method can cause ring circumference metallic fiber streamline destroyed in working angles, structure property worsens, and production efficiency is low, waste of material is serious.Ring rolling forming technology adopts continuous multi-pass deformation mode to be that the stable Accurate Shaping of such complicated groove ring provides reliable guarantee, and before rolling, the appropriate design of annular blank size is crucial.Patent No. CN102357531A discloses a kind of composite roll forming process of thick-wall deep-groove ring member, required blank dimension is rolled into square-section blank after connecting base and stress relief annealing technique by bar heating and upsetting, punching, punching to carry out design processing again, design process is numerous and diverse, waste of material is serious, reduces production efficiency.

Summary of the invention

The object of this invention is to provide the method for designing of a kind of groove oblique endoporus ring rolling blank dimension, effectively can overcome the shortcoming that prior art exists.

The object of the present invention is achieved like this, it is characterized in that design procedure is as follows, as shown in Figures 1 to 3:

(1) determine that rolling is than λ, choose the scope of rolling ratio according to given ring geomery, the span of λ is 2.0 ~ 2.5; λ=d _u/ d ₀, wherein d _uand d ₀be respectively the internal diameter at ring groove position and the internal diameter of blank;

(2) the volume V of the oblique endoporus ring of groove is calculated:

$\begin{array}{c}V=\mathrm{\π}H\[{\left(\frac{D-d_2}{2}\right)}^2-\frac{1}{3}{\left(H\tan \mathrm{\β}\right)}^2\]-\frac{4}{3}{\mathrm{\πR}}_u^3-\frac{1}{3}\mathrm{\π}{\left(\frac{H}{2}-R_u-h\right)}^3{\sin }^4{\mathrm{\α}}_1{\cos }^2{\mathrm{\α}}_1-\frac{8}{3}{\mathrm{\πR}}_u^3{\tan }^2\mathrm{\β}\\ -\frac{1}{3}\mathrm{\π}{\[\left(h_1+2R_u\right)\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right)\left({\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}-{\mathrm{sin\α}}_2{\mathrm{cos\α}}_2\right)\]}^2\[h_1-2R_u-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -\frac{1}{3}{\[h_1\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\]}^2\[h_1-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -2{\mathrm{\πR}}_u{\left(\frac{H}{2}-R_u-h\right)}^2{\left({\mathrm{sin\α}}_1{\mathrm{cos\α}}_1+{\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\right)}^2\end{array}$

Wherein, D is ring external diameter, d ₂for the little internal diameter of oblique endoporus, H is axial height, and h is size between groove outer and ring upper and lower end face, h ₁for groove outer height, R _ufor groove arc radius, α ₁, α ₂for the upper and lower inwall of groove and horizontal plane angle, β is the axial angle of oblique inner hole wall and ring;

(3) adopt enclosed pass rolling, the annular blank rolling starting section shape of design is rectangle, blank axial height H before rolling ₀equal ring height H, i.e. blank height H after rolling ₀=H;

(4) according to plastic history constancy of volume principle, design square-section all the other sizes of annular blank: blank internal diameter d ₀=d _u/ λ, blank external diameter

Advantage of the present invention and good effect: design process of the present invention is reasonable, blank dimension is accurate, can reach the stable realization of groove oblique endoporus ring rolling process and the appropriate design of rolling technological parameter, the appearance and size of ring is accurate, interior tissue performance quality is higher; Be designed to the realization that square-section blank is conducive to casting process, shorten the production cycle, have that production efficiency is high, the advantage of energy-saving material-saving.

Accompanying drawing explanation

Fig. 1 is the schematic cross-section of the oblique endoporus ring of groove.

Fig. 2 is the schematic cross-section of blank.

Fig. 3 is groove oblique endoporus ring rolling schematic diagram.

In figure: 1-core roller 2-guide roller 3-groove oblique endoporus ring 4-driven roller

Detailed description of the invention

With the oblique endoporus ring of groove shown in Fig. 1 for specific embodiment, require that the oblique endoporus ring of the groove of rolling forming is of a size of: ring outer diameter D=1843mm, oblique endoporus large diameter d ₁=1715mm, the little internal diameter d of oblique endoporus ₂=1686mm, axial height H=60mm, groove arc radius R _u=12mm, groove position internal diameter d _u=1783mm, size h=15mm between groove outer and ring upper and lower end face, groove outer height h ₁=30mm, the upper and lower inwall of groove and horizontal plane angle α ₁, α ₂be respectively 6 °, 5 °, oblique inner hole wall and the axial angle β of ring are 14 °; The design procedure of blank dimension is, as shown in Figures 1 to 3:

(1) determine that rolling is than λ, choose the scope of rolling ratio according to given ring geomery, this embodiment gets λ=2.2, λ=d _u/ d ₀, wherein d _uand d ₀be respectively the internal diameter at ring groove position and the internal diameter of blank;

(2) the volume V of the oblique endoporus ring of groove is calculated:

$\begin{array}{c}V=\mathrm{\π}H\[{\left(\frac{D-d_2}{2}\right)}^2-\frac{1}{3}{\left(H\tan \mathrm{\β}\right)}^2\]-\frac{4}{3}{\mathrm{\πR}}_u^3-\frac{1}{3}\mathrm{\π}{\left(\frac{H}{2}-R_u-h\right)}^3{\sin }^4{\mathrm{\α}}_1{\cos }^2{\mathrm{\α}}_1-\frac{8}{3}{\mathrm{\πR}}_u^3{\tan }^2\mathrm{\β}\\ -\frac{1}{3}\mathrm{\π}{\[\left(h_1+2R_u\right)\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right)\left({\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}-{\mathrm{sin\α}}_2{\mathrm{cos\α}}_2\right)\]}^2\[h_1-2R_u-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -\frac{1}{3}{\[h_1\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\]}^2\[h_1-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -2{\mathrm{\πR}}_u{\left(\frac{H}{2}-R_u-h\right)}^2{\left({\mathrm{sin\α}}_1{\mathrm{cos\α}}_1+{\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\right)}^2\end{array}$

Wherein, D is ring external diameter, d ₂for the little internal diameter of oblique endoporus, H is axial height, and h is size between groove outer and ring upper and lower end face, h ₁for groove outer height, R _ufor groove arc radius, α ₁, α ₂for the upper and lower inwall of groove and horizontal plane angle, β is the axial angle of oblique inner hole wall and ring;

(3) adopt enclosed pass rolling, the annular blank rolling starting section shape of design is rectangle, blank axial height H before rolling ₀equal ring height H, i.e. blank height H after rolling ₀=H=60mm;

(4) according to plastic history constancy of volume principle, design square-section all the other sizes of annular blank: blank internal diameter d ₀=d _u/ λ=810mm, blank external diameter

Claims (1)

1. a method for designing for groove oblique endoporus ring rolling blank dimension, is characterized in that design procedure is as follows:

(1) determine that rolling is than λ, choose the scope of rolling ratio according to given ring geomery, the span of λ is 2.0 ~ 2.5; λ=d _u/ d ₀, wherein d _uand d ₀be respectively the internal diameter at ring groove position and the internal diameter of blank;

(2) the volume V of the oblique endoporus ring of groove is calculated:

$\begin{array}{c}V=\mathrm{\π}H\[{\left(\frac{D-d_2}{2}\right)}^2-\frac{1}{3}{\left(H\tan \mathrm{\β}\right)}^2\]-\frac{4}{3}{\mathrm{\πR}}_u^3-\frac{1}{3}\mathrm{\π}{\left(\frac{H}{2}-R_u-h\right)}^3{\sin }^4{\mathrm{\α}}_1{\cos }^2{\mathrm{\α}}_1-\frac{8}{3}{\mathrm{\πR}}_u^3{\tan }^2\mathrm{\β}\\ -\frac{1}{3}\mathrm{\π}{\[\left(h_1+2R_u\right)\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right)\left({\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}-{\mathrm{sin\α}}_2{\mathrm{cos\α}}_2\right)\]}^2\[h_1-2R_u-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -\frac{1}{3}{\[h_1\tan \mathrm{\β}-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\]}^2\[h_1-\left(\frac{H}{2}-R_u-h\right){\sin }^2{\mathrm{\α}}_1\]\\ -2{\mathrm{\πR}}_u{\left(\frac{H}{2}-R_u-h\right)}^2{\left({\mathrm{sin\α}}_1{\mathrm{cos\α}}_1+{\sin }^2{\mathrm{\α}}_1\tan \mathrm{\β}\right)}^2\end{array}$

Wherein, D is ring external diameter, d ₂for the little internal diameter of oblique endoporus, H is axial height, and h is size between groove outer and ring upper and lower end face, h ₁for groove outer height, R _ufor groove arc radius, α ₁, α ₂for the upper and lower inwall of groove and horizontal plane angle, β is the axial angle of oblique inner hole wall and ring;

(3) adopt enclosed pass rolling, the annular blank rolling starting section shape of design is rectangle, blank axial height H before rolling ₀equal ring height H, i.e. blank height H after rolling ₀=H;

(4) according to plastic history constancy of volume principle, design square-section all the other sizes of annular blank: blank internal diameter d ₀=d _u/ λ, blank external diameter