CN102651048A - Optimization method for rapidly conducting structural design on hydrostatic press - Google Patents

Abstract

An optimization method for rapidly conducting the structural design on a hydrostatic press comprises the following steps: determining main parameters of the hydrostatic press; establishing the forced models of main structures of the hydrostatic press; establishing the forced models of the main structures according to the relatedness and the main parameters of the main structures; establishing a calculation table according to the main parameters of the hydrostatic press and the established forced models of the main structures; inputting the main parameters and the sectional parameters of the main structures for calculation; and analyzing the calculation result, and if the result is improper, after the main parameters and the sectional parameters are adjusted renewedly, a new result is calculated immediately. The calculating process is rapid, and all that is needed is to input the parameters, the stress and the deflection value of the hydrostatic press can be obtained. The structural parameters of the hydrostatic press are adjusted conveniently, and can be properly adjusted according to the output result, the result accuracy is high, and the requirement on the strength and the rigidity is met. The optimization method does not simply calculate the stress station of single parts but comprehensively considers the influences of the main structures of the hydrostatic press.

Description

A kind ofly fast hydropress is carried out the optimum Design of Structure method

Technical field

The present invention relates to a kind of optimum Design of Structure method, particularly relate to and a kind ofly can carry out quick structural design hydropress, calculate the hydropress critical part intensity, rigidity fast hydropress is carried out the optimum Design of Structure method.

Background technology

Generally when hydropress was carried out structural design, conventional method was that elder generation rule of thumb confirms several key dimensions, and then carries out detailed and calculating and adjustment repeatedly, and to reach suitable strength and stiffness, calculated amount is very big.

Simultaneously; Traditionally the hydropress main member is carried out intensity when calculating, generally certain part such as entablature are reduced to independent stress model and calculate, do not take all factors into consideration other effect on structure; When other structure has change; The stressed of entablature need calculate again, check again, and the calculating in early stage loses meaning, has wasted great amount of time and energy.

Summary of the invention

The present invention provides a kind of for solving the technical matters that exists in the known technology: taken all factors into consideration the contact of hydropress primary structure; Set up computation model with relevance; When certain parameter in the structure changes, can obtain immediately after each structural change stress value fast hydropress is carried out the optimum Design of Structure method.

The present invention for the technical scheme that solves the technical matters that exists in the known technology and take is: a kind ofly fast hydropress is carried out the optimum Design of Structure method, it is characterized in that, comprise the steps:

1) confirms the major parameter of hydropress;

2) set up the stress model of each primary structure of hydropress;

3) according to Structural Interrelationship property and major parameter everywhere, set up the stress model of structure everywhere;

The stress model of the structure of 4) setting up according to the determined hydropress major parameter of step 1) and step 3) is everywhere set up reckoner;

5) cross section parameter of input major parameter and each structure calculates;

6) analysis result, if the result is improper, readjust major parameter and cross section parameter after, calculate the result make new advances immediately.

The described major parameter of step 1) comprises: nominal pressure P, throat depth L, work top B, lower and upper cross-member spacing H and oil cylinder shoulder D outer diameter.

Step 2) described stress model includes the cross section parameter of entablature, pillar and the sill of hydropress, comprising:

J ₁: entablature cross sectional moment of inertia, cm ⁴

J ₂: pillar cross sectional moment of inertia, cm ⁴

J ₃: sill cross sectional moment of inertia, cm ⁴And

h ₁: entablature lower plane to entablature neutral line distance, cm;

h ₂: pillar front panel to pillar neutral line distance, cm;

h ₃: plane separation sill neutral line distance on the sill, cm.

Described Structural Interrelationship property everywhere of step 3) and stress model comprise:

Entablature bending stress σ ₁:

${\mathrm{\&sigma;}}_1=\frac{P(L+h_2)\&times;h_1}{{\mathrm{<figure-callout\; id="1"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_1}$

Pillar bending stress σ ₂:

${\mathrm{\&sigma;}}_2=\frac{P(L+h_2)\&times;h_2}{{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_2}$

Sill bending stress σ ₃:

${\mathrm{\&sigma;}}_3=\frac{P(L+h_2)\&times;h_3}{{\mathrm{<figure-callout\; id="3"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_3}.$

Advantage and good effect that the present invention has are: of the present inventionly a kind ofly fast hydropress is carried out the optimum Design of Structure method, computation process is fast rapid, and input parameter can obtain the stress and the deflection value of hydropress.The hydropress structural parameters are easy to adjust, can suitably adjust the hydropress structural parameters according to the output result, satisfy the requirement on the strength and stiffness; Result precision is high, has taken all factors into consideration hydropress effect on structure everywhere, rather than has simply calculated the stress state of single part.Can be efficiently the strength and stiffness of hydropress be calculated, and can be timely structure is everywhere changed and optimized.The present invention can be used for whole single arm hydrodynamic press and integral frame-type hydropress.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Among the figure: 1, entablature part; 2, leg portion; 3, sill part.

Embodiment

For further understanding a kind of summary of the invention, characteristics and effect of fast hydropress being carried out the optimum Design of Structure method of the present invention, enumerate following examples now, and conjunction with figs. specifies as follows:

Of the present inventionly a kind ofly fast hydropress is carried out the optimum Design of Structure method; Taken all factors into consideration the influence of hydropress primary structure; Set up computation model with relevance; When certain parameter in the structure changes (like the side cylinder spacing in the triplex structure or the throat depth in the single armed structure), can obtain the stress value after each structural change immediately.Specifically comprise the steps:

1) confirms the major parameter of hydropress;

Described major parameter comprises: nominal pressure P, throat depth L (cm), work top B (cm), lower and upper cross-member spacing H (cm) and oil cylinder shoulder D outer diameter (cm) etc.

2) set up the stress model of each primary structure of hydropress;

Described stress model includes the cross section parameter of entablature, pillar and the sill of hydropress, comprising:

J ₁: entablature cross sectional moment of inertia, cm ⁴

J ₂: pillar cross sectional moment of inertia, cm ⁴

J ₃: sill cross sectional moment of inertia, cm ⁴And

h ₁: entablature lower plane to entablature neutral line distance, cm;

h ₂: pillar front panel to pillar neutral line distance, cm;

h ₃: plane separation sill neutral line distance on the sill, cm.

3) according to Structural Interrelationship property and major parameter everywhere, set up the stress model of structure everywhere;

Described stress model comprises:

Entablature bending stress σ ₁:

${\mathrm{\&sigma;}}_1=\frac{P(L+h_2)\&times;h_1}{{\mathrm{<figure-callout\; id="1"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_1}$

Pillar bending stress σ ₂:

${\mathrm{\&sigma;}}_2=\frac{P(L+h_2)\&times;h_2}{{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_2}$

Sill bending stress σ ₃:

${\mathrm{\&sigma;}}_3=\frac{P(L+h_2)\&times;h_3}{{\mathrm{<figure-callout\; id="3"\; label="J"\; filenames="HDA0000158245260000011.png"\; state="\{\{state\}\}">J</figure-callout>}}_3};$

4) by visible in step 3) various; Stress relation between entablature, pillar, the sill with all have relevance each other; Influence each other; Therefore, according to the relation between each parameter, and the stress model of the structure everywhere set up of the determined hydropress major parameter of step 1) and step 3) is set up reckoner table 1.

5) cross section parameter of input major parameter and each structure calculates;

6) analysis result, if the result is improper, readjust major parameter and cross section parameter after, calculate the result make new advances immediately.

Of the present inventionly a kind ofly fast hydropress is carried out the optimum Design of Structure method; Structural parameters through the input hydraulic pressure machine; Comprise nominal pressure P, throat depth L, work top B, case bay H, oil cylinder shoulder D outer diameter, elastic modulus E up and down; And the cross section property of hydropress structure (comprising entablature, pillar, sill), obtain stress σ, corner Δ and the deformation values f of structure everywhere fast.

Table l

Quick structural design optimization reckoner

Claims (4)

1. one kind is carried out the optimum Design of Structure method to hydropress fast, it is characterized in that, comprises the steps:

1) confirms the major parameter of hydropress;

2) set up the stress model of each primary structure of hydropress;

3) according to Structural Interrelationship property and major parameter everywhere, set up the stress model of structure everywhere;

The stress model of the structure of 4) setting up according to the determined hydropress major parameter of step 1) and step 3) is everywhere set up reckoner;

5) cross section parameter of input major parameter and each structure calculates;

6) analysis result, if the result is improper, readjust major parameter and cross section parameter after, calculate the result make new advances immediately.

2. according to claim 1ly a kind ofly fast hydropress is carried out the optimum Design of Structure method, it is characterized in that the described major parameter of step 1) comprises: nominal pressure P, throat depth L, work top B, lower and upper cross-member spacing H and oil cylinder shoulder D outer diameter.

3. according to claim 1ly a kind ofly fast hydropress being carried out the optimum Design of Structure method, it is characterized in that step 2) described stress model includes the cross section parameter of entablature, pillar and the sill of hydropress, comprising:

J ₁: entablature cross sectional moment of inertia, cm ⁴

J ₂: pillar cross sectional moment of inertia, cm ⁴

J ₃: sill cross sectional moment of inertia, cm ⁴And

h ₁: entablature lower plane to entablature neutral line distance, cm;

h ₂: pillar front panel to pillar neutral line distance, cm;

h ₃: plane separation sill neutral line distance on the sill, cm.

4. according to claim 1ly a kind ofly fast hydropress is carried out the optimum Design of Structure method, it is characterized in that described Structural Interrelationship property everywhere of step 3) and stress model comprise:

Entablature bending stress σ ₁:

${\mathrm{\&sigma;}}_1=\frac{P(L+h_2)\&times;h_1}{J_1}$

Pillar bending stress σ ₂:

${\mathrm{\&sigma;}}_2=\frac{P(L+h_2)\&times;h_2}{J_2}$

Sill bending stress σ ₃:

${\mathrm{\&sigma;}}_3=\frac{P(L+h_2)\&times;h_3}{J_3}.$

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