CN102651048B - 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 of optimization method fast hydraulic press being carried out to structural design

Technical field

The present invention relates to a kind of optimization method of structural design, particularly relating to one can carry out rapid structural design to hydraulic press, calculates the intensity of hydraulic press major part, quick optimization method hydraulic press being carried out to structural design of rigidity.

Background technology

Generally when carrying out structural design to hydraulic press, conventional method first rule of thumb determines several key dimension, and then carry out detailed and calculate and adjustment repeatedly, and to reach suitable strength and stiffness, amount of calculation is very large.

Simultaneously, when traditionally Strength co-mputation being carried out to hydraulic press main member, generally the stress model that certain part is as independent in entablature is reduced to is calculated, do not consider the impact of other structure, when other structure has change, the stressed need of entablature re-start calculating, again check, and the calculating in early stage loses meaning, wastes a large amount of time and efforts.

Summary of the invention

The present invention provides a kind of for solving in known technology the technical problem that exists: the contact having considered hydraulic press primary structure, establish the computation model with relevance, when certain parameter in structure changes, quick optimization method hydraulic press being carried out to structural design of the stress value after the change of each structure can be obtained immediately.

The technical scheme that the present invention takes for the technical problem existed in solution known technology is: a kind of optimization method fast hydraulic press being carried out to structural design, is characterized in that, comprise the steps:

1) major parameter of hydraulic press is determined;

2) stress model of each primary structure of hydraulic press is set up;

3) according to relevance and the major parameter of structure everywhere, the stress model of structure is everywhere set up;

4) according to step 1) determined hydraulic press major parameter and step 3) stress model of structure everywhere set up sets up computational chart;

5) input the cross section parameter of major parameter and each structure, calculate;

6) analysis result, if result is improper, after readjusting major parameter and cross section parameter, calculates the result made new advances immediately.

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

Step 2) described in stress model include the cross section parameter of the entablature of hydraulic press, pillar and sill, comprising:

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

J ₂: Post sections the moment of inertia, cm ⁴;

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

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 sill, cm.

Step 3) described in the relevance of structure everywhere and stress model comprise:

Entablature bending stress σ ₁:

${\mathrm{\σ}}_1=\frac{P(L+h_2)\×h_1}{J_1}$

Post bends stress σ ₂:

${\mathrm{\σ}}_2=\frac{P(L+h_2)\×h_2}{J_2}$

Sill bending stress σ ₃:

${\mathrm{\σ}}_3=\frac{P(L+h_2)\×h_3}{J_3}.$

The advantage that the present invention has and good effect are: a kind of optimization method fast hydraulic press being carried out to structural design of the present invention, computational process is fast rapid, and input parameter can obtain stress and the deflection value of hydraulic press.Hydraulic press adjust on structural parameter is convenient, suitably can adjust, meet the requirement on strength and stiffness according to Output rusults to hydraulic press structural parameters; Result precision is high, has considered the impact of hydraulic press structure everywhere, instead of the simple stress state calculating single part.Can calculate the strength and stiffness of hydraulic press efficiently, and can timely structure everywhere be changed and be optimized.The present invention can be used for overall single arm hydrodynamic press and Integral frame-type hydraulic machine.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

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

Detailed description of the invention

For a kind of summary of the invention, Characteristic fast hydraulic press being carried out to the optimization method of structural design of the present invention can be understood further, hereby enumerate following examples, and coordinate accompanying drawing to be described in detail as follows:

A kind of optimization method fast hydraulic press being carried out to structural design of the present invention, consider the impact of hydraulic press primary structure, establish the computation model with relevance, when certain parameter in structure changes (as the side cylinder spacing in triplex structure or the throat depth in single arm structure), the stress value after the change of each structure can be obtained immediately.Specifically comprise the steps:

1) major parameter of hydraulic press is determined;

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 outer diameter D (cm) etc.

2) stress model of each primary structure of hydraulic press is set up;

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

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

J ₂: Post sections the moment of inertia, cm ⁴;

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

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 sill, cm.

3) according to relevance and the major parameter of structure everywhere, the stress model of structure is everywhere set up;

Described stress model comprises:

Entablature bending stress σ ₁:

${\mathrm{\σ}}_1=\frac{P(L+h_2)\×h_1}{J_1}$

Post bends stress σ ₂:

${\mathrm{\σ}}_2=\frac{P(L+h_2)\×h_2}{J_2}$

Sill bending stress σ ₃:

${\mathrm{\σ}}_3=\frac{P(L+h_2)\×h_3}{J_3};$

4) from step 3) various in, stress relation between entablature, pillar, sill with all there is relevance each other, affect each other, therefore, according to the relation between each parameter, and step 1) determined hydraulic press major parameter and step 3) stress model of structure everywhere set up sets up computational chart table 1.

5) input the cross section parameter of major parameter and each structure, calculate;

6) analysis result, if result is improper, after readjusting major parameter and cross section parameter, calculates the result made new advances immediately.

A kind of optimization method fast hydraulic press being carried out to structural design of the present invention, by the structural parameters of input hydraulic pressure machine, comprise nominal pressure P, throat depth L, work top B, up and down case bay H, oil cylinder shoulder outer diameter D, elastic modulus E, and the cross section property of hydraulic press structure (comprising entablature, pillar, sill), obtain the stress σ of structure everywhere, corner Δ and deformation values f fast.

Table l

Rapid structural design optimization computational chart

Claims (2)

1. fast hydraulic press is carried out to an optimization method for structural design, it is characterized in that, comprise the steps:

1) major parameter of hydraulic press is determined;

2) set up the stress model of each primary structure of hydraulic press, described stress model includes the cross section parameter of the entablature of hydraulic press, pillar and sill, comprising:

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

J ₂: Post sections the moment of inertia, cm ⁴;

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

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 sill, cm;

3) according to relevance and the major parameter of structure everywhere, set up the stress model of structure everywhere, relevance and the stress model of described structure everywhere comprise:

Entablature bending stress σ ₁:

${\mathrm{\σ}}_1=\frac{P(L+h_2)\×h_1}{J_1}$

Post bends stress σ ₂:

${\mathrm{\σ}}_2=\frac{P(L+h_2)\×h_2}{J_2}$

Sill bending stress σ ₃:

${\mathrm{\σ}}_3=\frac{P(L+h_2)\×h_3}{J_3},$

In formula, P is nominal pressure, and L is throat depth;

4) according to step 1) determined hydraulic press major parameter and step 3) stress model of structure everywhere set up sets up computational chart;

5) input the cross section parameter of major parameter and each structure, calculate;

6) analysis result, if result is improper, after readjusting major parameter and cross section parameter, calculates the result made new advances immediately.

2. a kind of optimization method fast hydraulic press being carried out to structural design according to claim 1, is characterized in that, step 1) described in major parameter comprise: nominal pressure P, throat depth L, work top B, lower and upper cross-member spacing H and oil cylinder shoulder outer diameter D.