CN102175377A - Method for on-line measuring forging force of flywheel energy-storage screw press - Google Patents

Abstract

The invention relates to a method for on-line measuring a forging force of a flywheel energy-storage screw press, which comprises the following steps: 1) acquiring a flywheel angular velocity by a velocity sensor which is fixedly connected to a flywheel rotating shaft of a screw press, and transmitting the acquired information to a control computer; 2) processing the information by the control computer and storing acquired formed force into a storage; and 3) choosing the maximal formed force, namely, to-be-measured forging force, by the control computer, and displaying a result on a computer screen. Compared with the prior art, the method provided by the invention has the advantages of high reliability, long service life and the like, moreover, the measuring method is simple, and the measuring error caused by eccentric load is avoided.

Description

A kind of method of on-line measurement flywheel energy storage fly press forging force

Technical field

The present invention relates to a kind of method of measuring forging force, especially relate to a kind of method of on-line measurement flywheel energy storage fly press forging force.

Background technology

The method of traditional on-line measurement flywheel energy storage fly press forging force adopts strain measurement system mostly, utilizes the forging force of the elastic deformation measurement fly press of element.Traditional measuring method has following defective: needs additional strain measurement system, is difficult for overcoming the measuring error that eccentric load causes when forging, and the easy interferometry of bad working environment during forging, the life-span of strain measurement system is limited.

Summary of the invention

Purpose of the present invention be exactly provide in order to overcome the defective that above-mentioned prior art exists that a kind of measuring method is simple, good reliability, long service life, can also avoid the method for the on-line measurement flywheel energy storage fly press forging force of the measuring error that eccentric lotus causes.

Purpose of the present invention can be achieved through the following technical solutions: a kind of method of on-line measurement flywheel energy storage fly press forging force is characterized in that this method may further comprise the steps:

1) speed probe that is fixedly connected on the fly press flywheel turning axle is gathered flywheel angular velocity, and gives control computer with the information conveyance of gathering;

2) control computer is handled information, and will draw plastic force and be stored in the storer;

3) control computer is selected maximum plastic force, and the plastic force of described maximum is the forging force that will measure, and the result is presented on the computer screen.

Described control computer is handled to be specially to information and is passed through formula

$P_i=\frac{1}{2}(-B+\sqrt{B^2-4\mathrm{\βC}{J}_0({\mathrm{\ω}}_i-{\mathrm{\ω}}_{i-1}){\mathrm{\ω}}_i})$

$B=\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}C(t_i-t_{i-1}){\mathrm{\&omega;}}_i-P_{i-1}$

$J_0={\left(\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}\right)}^{2}m+J$

β represents that energy reduction coefficient, C represent fly press global stiffness, J in the formula ₀Equivalent moment of inertia, the t of expression fly press kinematic system _iExpression acquisition time point, ω _iExpression t _iFlywheel angular velocity, h constantly represents screw rod helical pitch, P _iExpression t _iQuality, the J of plastic force constantly, the slide block assembly that m represents moving linearly represents the moment of inertia of the fly wheel assembly that rotates;

Calculate plastic force.

Described energy reduction coefficient and fly press global stiffness obtain by the following method:

21) from the relation curve of blow energy and annulus compressibility, choose 2 points, and according to the blow energy adjustable screw pressing machine blow energy of described selected point correspondence;

22) the control fly press hits annulus, and measures external diameter and height after the preceding flywheel rotating speed of strike, the annulus distortion;

23) successively by different coefficients of friction down under the relation curve, different coefficients of friction of distortion annulus external diameter and height under the relation curve of blow energy and annulus distortion back height and the different coefficients of friction forging force and annulus distortion back relation curve highly obtain pairing forging deformation energy of described point and forging force;

24) pass through equation

$\left\{\begin{array}{c}\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="1"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^2}{2\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">C</figure-callout>}}\\ \frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="2"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_2^2}{2C}\end{array}\right.$

Solve energy reduction coefficient and fly press global stiffness.

The relation curve of described blow energy and annulus compressibility, different coefficients of friction down under the relation curve, different coefficients of friction of distortion annulus external diameter and height under the relation curve of blow energy and annulus distortion back height, the different coefficients of friction forging force and annulus distortion back relation curve highly be and utilize plasticity finite element software according to curve map that annulus drew.

Described annulus is the annulus that metal material is made.

It is 50% and 60% o'clock pairing point that described 2 of choosing are respectively the annulus ratio of compression.

Described t ₀Initial plastic force P constantly ₀Equal 0.

Compared with prior art, the present invention has the following advantages:

1, the present invention utilizes the power of fly press can concern the on-line measurement of carrying out forging force, need not expensive strain measurement system.

2, owing to do not re-use foil gauge as the sensing element that detects local elasticity's distortion, the measuring error that the present invention has avoided eccentric load to cause.

3, the present invention can adapt to the forging site environment, and the reliability and the serviceable life of measuring system get a promotion.

Description of drawings

Fig. 1 is a process flow diagram of the present invention;

Fig. 2 is the graph of relation of blow energy and annulus compressibility during for 63000kN fly press design friction factor m=0.2;

Fig. 3 is the graph of relation that is out of shape annulus external diameter and height for 63000kN fly press design different coefficients of friction down;

Fig. 4 is the graph of relation for blow energy under the 63000kN fly press design different coefficients of friction and annulus distortion back height;

Fig. 5 is the graph of relation for forging force under the 63000kN fly press design different coefficients of friction and annulus distortion back height.

Embodiment

The present invention is described in detail below in conjunction with the drawings and specific embodiments.

Embodiment

At first carry out hardware configuration: the speed probe that will measure the flywheel rotation status is fixedly connected on the fly press flywheel turning axle, and speed probe output flywheel tach signal is to the computing machine of controlling fly press.

Make the annulus calibration element then: the annulus calibration element adopts 10 steel, is that 210mm, internal diameter are 140mm, highly are 70mm according to the annulus external diameter of fly press nominal pressure and blow energy design.2 of annulus calibration element quantity.

Then utilize plasticity finite element DEFORM software to make following curve map: the 1. relation curve of blow energy and annulus compressibility during as shown in Figure 1 friction factor m=0.2 according to the annulus calibration element, 2. different coefficients of friction as shown in Figure 2 is out of shape the relation curve of annulus external diameter and height down, 3. blow energy and annulus are out of shape back relation curve highly under the different coefficients of friction as shown in Figure 3,4. forging force and annulus distortion back relation curve highly under the different coefficients of friction as shown in Figure 4.

Since screw rod helical pitch h=420mm, the quality m=46000kg of the slide block assembly of moving linearly, the moment of inertia J=60557kgm of the fly wheel assembly that rotates ²According to formula

Calculate the equivalent moment of inertia J of fly press kinematic system ₀=61379kgm ²

Forging force is demarcated:

From the relation curve of Fig. 1 blow energy and annulus compressibility, choose the annulus compressibility and be 50% o'clock blow energy E ₁=850kJ is adjusted near the 850kJ blow energy grade 800kJ with the fly press blow energy, from speed probe record hit before the flywheel rotational speed omega ₁=5.1rad/s records the outer diameter D after annulus is out of shape behind the strike annulus ₁=251.39mm and height h ₁=38.75mm is according to D ₁And h ₁Determine that from Fig. 2 friction factor is 0.3, according to friction factor 0.3 and h ₁=38.75mm obtains corresponding forging deformation from Fig. 3 can E _D1=490.86kJ is according to friction factor 0.3 and h ₁=38.75mm obtains corresponding forging force P from Fig. 4 ₁=26.03MN.

From the relation curve of Fig. 1 blow energy and annulus compressibility, choose the annulus compressibility and be 60% o'clock blow energy E ₂=1170kJ is adjusted near the 1170kJ blow energy grade 1200kJ with the fly press blow energy, from speed probe record hit before flywheel rotating speed 6.3rad/s, hit the outer diameter D that records behind the annulus after the annulus distortion ₂=269.4mm and height h ₂=30.75mm is according to D ₂And h ₂Determine that from Fig. 2 friction factor is 0.3, according to friction factor 0.3 and h ₂=30.75mm obtains corresponding forging deformation from Fig. 3 can E _D2=733.45kJ is according to friction factor 0.3 and h ₂=30.75mm obtains corresponding forging force P from Fig. 4 ₂=35.49MN.

Related data is inserted following simultaneous equations, find the solution and obtain energy reduction coefficient β=0.67 and fly press global stiffness C=7241N/m.

$\left\{\begin{array}{c}\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="1"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^2}{2\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">C</figure-callout>}}\\ \frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="2"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_2^2}{2C}\end{array}\right.$

Forge force measurement: obtain different time points t from speed probe during forging _iThe time the flywheel angular velocity omega _i, according to formula

Recursion calculates the plastic force of different time points in the forging process, and wherein Zui Da plastic force is the forging force that will measure.In the formula

It is t that forging begins ₀Constantly initial plastic force P ₀=0.

Recursion is calculated from slide block and is descended, and finishes to the slide block backhaul.At last, in the control computer of fly press forging force result of calculation is shown in computer screen.

Formula wherein

$P_i=\frac{1}{2}(-B+\sqrt{B^2-4\&times;0.67\&times;7241\&times;61379({\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}){\mathrm{\&omega;}}_i})$ With

$\left\{\begin{array}{c}\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="1"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^2}{2\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">C</figure-callout>}}\\ \frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="2"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_2^2}{2C}\end{array}\right.$

Derivation as follows:

At present, fly press mainly leans against the energy that discharges the flywheel savings when hitting and realizes contour forging technique.If the energy of fly press flywheel savings is certain value E ₀, for computer-controlled modern fly press, E ₀Size be adjustable.The energy that consumes is made up of three parts: the friction that is mainly produced by screw pair during fly press work consumes part energy E _m, the strain energy of distortion E that the stamp work distortion absorbs _d, energy remaining is converted into the elastic deformation energy E of fly press _t

Pass between the energy is

E ₀+E _m+E _d+E _t＝0 (1)

It is generally acknowledged friction consumed energy E _m=(β-1) E ₀β is called flywheel energy reduction coefficient, with the structural parameters and the lubrication state relevant (1) of main screw pair, heel piece.

$\mathrm{\&beta;}=\frac{1}{\frac{\tan (\mathrm{\&theta;}+\mathrm{\&phi;})}{\tan \mathrm{\&theta;}}+\frac{4\mathrm{\&pi;fr}}{3h}}---\left(2\right)$

θ is the lead angle of screw pair in the formula, and φ is the equivalent friction angle of screw pair, and f is a friction factor, and r is heel sheet radius.

Therefore, formula (1) is reduced to

βE ₀+E _d+E _t＝0 (3)

If P is the hitting power of fly press, h is the helical pitch of screw flight, and ω is a flywheel angular velocity, then the stamp work deformation energy

$E_d=\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}\&Integral;\mathrm{P\&omega;dt}---\left(4\right)$

The elastic deformation energy of fly press

$E_t=\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}^2}{2C}---\left(5\right)$

C is the fly press global stiffness in the formula, and available following formula calculates (2).

$C=k_c\sqrt{\frac{P_g}{10}}---\left(6\right)$

k _cBe stiffness coefficient, P _gBe the fly press nominal pressure.

When the stamp work deformation energy hour, hitting power increases.Fly press is cold when hitting, and the stamp work deformation energy is 0, and hitting power can reach sizable degree.For guaranteeing the safety of equipment, be necessary the pressure of fly press is realized monitoring.In addition, the monitoring to pressure also helps improving contour forging technique, the prolongation forging die life-span.

The fly press stored energy

$E_0=\frac{1}{2}{J}_0{\mathrm{\&omega;}}^2---\left(7\right)$

J in the formula ₀Be flywheel equivalent moment of inertia, ω is a flywheel angular velocity.

$J_0={\left(\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}\right)}^{2}m+J---\left(8\right)$

M is the quality of the slide block assembly part of moving linearly, and J is the fly wheel assembly moment of inertia partly that rotates.

According to formula (3), have in the time diffusion section

$\mathrm{\&beta;}{J}_0\mathrm{\&omega;}\frac{\mathrm{d\&omega;}}{\mathrm{dt}}+\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}\mathrm{P\&omega;}+\frac{P}{C}\frac{\mathrm{dP}}{\mathrm{dt}}=0---\left(9\right)$

For producing a certain moment t that forges load _i, approximate expression is arranged

$\mathrm{\&beta;}{J}_0{\mathrm{\&omega;}}_i\frac{{\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}}{t_i-t_{i-1}}+\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}{P}_i{\mathrm{\&omega;}}_i+\frac{P_i}{C}\frac{P_i-P_{i-1}}{t_i-t_{i-1}}=0---\left(10\right)$

Promptly

${\mathrm{<figure-callout\; id="2"\; label="P\; i"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_i^{}+(\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}C(t_i-t_{i-1}){\mathrm{\&omega;}}_i-P_{i-1})P_i+\mathrm{\&beta;C}{J}_0({\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}){\mathrm{\&omega;}}_i=0---\left(11\right)$

If

$B=\frac{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">h</figure-callout>}}{2\mathrm{\&pi;}}C(t_i-t_{i-1}){\mathrm{\&omega;}}_i-P_{i-1}$

Solve from formula (11)

$P_i=\frac{1}{2}(-B\&PlusMinus;\sqrt{B^2-4\mathrm{\&beta;C}{J}_0({\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}){\mathrm{\&omega;}}_i})---\left(12\right)$

Because P _i＞0, so get before the radical sign in the formula (12)+, promptly

$P_i=\frac{1}{2}(-B+\sqrt{B^2-4\mathrm{\&beta;C}{J}_0({\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}){\mathrm{\&omega;}}_i})---\left(13\right)$

β, C and J in the formula ₀All can be by calculating, equivalent moment of inertia J wherein ₀Can obtain more accurate numerical value according to the fly press three-dimensional CAD model, there are certain deviation in flywheel energy reduction coefficient β and fly press global stiffness C from result and the actual state that formula calculates.It is determined the better effect that can get by calibration technique as undetermined parameter.t _i, t _I-1, ω _i, ω _I-1Can in the process of measuring the variation of flywheel rotary state, utilize speed probe to obtain forging force initial value P ₀Be 0, calculate the forging force P of each time period by formula (12) recursion _i

The demarcation of forging force: no matter be to utilize foil gauge to measure forging force, still utilize power to concern and measure forging force, all be unable to do without the demarcation problem of forging force.For small-sized forging equipment, the demarcation of forging force is fairly simple, generally adopts the pressure transducer of a standard to export pressure accurately, with this pressure value the pressure that detects is carried out and is demarcated.But for large-sized forging equipment, be difficult to find suitable standard pressure transducer, carry out the demarcation of forging force and need adopt additive method.Annulus jumping-up method is a kind of effective scaling method.Annulus jumping-up method adopts DEFORM finite element analysis software annulus jumping-up, and the relation between annulus distortion and the power energy of obtaining is used for the demarcation of forging force.

For motion parts stored energy 2000kJ, nominal pressure is the fly press of 63000kN, adopts 10 steel annulus, and the annulus external diameter is 210mm, and internal diameter is 140mm, and height is 70mm.Can draw Fig. 2, Fig. 3, Fig. 4 and curve shown in Figure 5 according to the DEFORM result of finite element.Fig. 2 curve description the relation of fly press blow energy and annulus compressibility under the friction factor m=0.2 condition.Fig. 3 curve representation different coefficients of friction is distortion annulus external diameter and relation highly down.Fig. 4 curve description the relation of fly press blow energy and annulus distortion back height under the different coefficients of friction condition.The relation of forging force and high annulus degree under Fig. 5 curve representation different coefficients of friction.As choose the annulus compressibility from Fig. 2 is 49% and 61%, and corresponding blow energy is 800kJ and 1200kJ.The fly press blow energy is adjusted to respectively near 800kJ and the 1200kJ, hits the outer diameter D that records respectively behind the annulus after the annulus distortion ₁And D ₂And height h ₁And h ₂, determine friction factor according to annulus external diameter and height from Fig. 3, obtain corresponding forging deformation energy E according to friction factor and annulus height from Fig. 4 _D1And E _D2, obtain corresponding forging force P from Fig. 5 according to friction factor and annulus height ₁And P ₂Fly press flywheel rotating speed is respectively ω before forging strike ₁And ω ₂, corresponding stored energy is

$E_{01}=\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2$

$E_{02}=\frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2$

Corresponding to forging force P ₁And P ₂Elastic deformation energy be respectively

${\mathrm{<figure-callout\; id="1"\; label="E\; t"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_t=\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^2}{2C}$

${\mathrm{<figure-callout\; id="2"\; label="E\; t"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_t=\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_2^2}{2C}$

With above-mentioned parameter substitution formula (3), have

$\left\{\begin{array}{c}\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="1"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^2}{2\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">C</figure-callout>}}\\ \frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2\mathrm{\&beta;}={\mathrm{<figure-callout\; id="2"\; label="E\; d"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">E</figure-callout>}}_d+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="HDA0000049245300000011.png"\; state="\{\{state\}\}">P</figure-callout>}}_2^2}{2C}\end{array}\right.---\left(14\right)$

From simultaneous equations (14), obtain energy reduction coefficient β and fly press global stiffness C.

Claims (7)

1. the method for an on-line measurement flywheel energy storage fly press forging force is characterized in that this method may further comprise the steps:

1) speed probe that is fixedly connected on the fly press flywheel turning axle is gathered flywheel angular velocity, and gives control computer with the information conveyance of gathering;

2) control computer is handled information, and will draw plastic force and be stored in the storer;

3) control computer is selected maximum plastic force, and the plastic force of described maximum is the forging force that will measure, and the result is presented on the computer screen.

2. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 1 is characterized in that, described control computer is handled to be specially to information and passed through formula

$P_i=\frac{1}{2}(-B+\sqrt{B^2-4\mathrm{\&beta;C}{J}_0({\mathrm{\&omega;}}_i-{\mathrm{\&omega;}}_{i-1}){\mathrm{\&omega;}}_i})$

$B=\frac{h}{2\mathrm{\&pi;}}C(t_i-t_{i-1}){\mathrm{\&omega;}}_i-P_{i-1}$

$J_0={\left(\frac{h}{2\mathrm{\&pi;}}\right)}^{2}m+J$

β represents that energy reduction coefficient, C represent fly press global stiffness, J in the formula ₀Equivalent moment of inertia, the t of expression fly press kinematic system _iExpression acquisition time point, ω _iExpression t _iFlywheel angular velocity, h constantly represents screw rod helical pitch, P _iExpression t _iQuality, the J of plastic force constantly, the slide block assembly that m represents moving linearly represents the moment of inertia of the fly wheel assembly that rotates;

Calculate plastic force.

3. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 2 is characterized in that, described energy reduction coefficient and fly press global stiffness obtain by the following method:

21) from the relation curve of blow energy and annulus compressibility, choose 2 points, and according to the blow energy adjustable screw pressing machine blow energy of described selected point correspondence;

22) the control fly press hits annulus, and measures external diameter and height after the preceding flywheel rotating speed of strike, the annulus distortion;

23) successively by different coefficients of friction down under the relation curve, different coefficients of friction of distortion annulus external diameter and height under the relation curve of blow energy and annulus distortion back height and the different coefficients of friction forging force and annulus distortion back relation curve highly obtain pairing forging deformation energy of described point and forging force;

24) pass through equation

$\left\{\begin{array}{c}\frac{1}{2}{J}_0{\mathrm{\&omega;}}_1^2\mathrm{\&beta;}=E_{d1}+\frac{P_1^2}{2C}\\ \frac{1}{2}{J}_0{\mathrm{\&omega;}}_2^2\mathrm{\&beta;}=E_{d2}+\frac{P_2^2}{2C}\end{array}\right.$

Solve energy reduction coefficient and fly press global stiffness.

4. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 3, it is characterized in that, the relation curve of described blow energy and annulus compressibility, different coefficients of friction down under the relation curve, different coefficients of friction of distortion annulus external diameter and height under the relation curve of blow energy and annulus distortion back height, the different coefficients of friction forging force and annulus distortion back relation curve highly be and utilize plasticity finite element software according to curve map that annulus drew.

5. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 4 is characterized in that described annulus is the annulus that metal material is made.

6. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 3 is characterized in that, it is 50% and 60% o'clock pairing point that described 2 of choosing are respectively the annulus ratio of compression.

7. the method for a kind of on-line measurement flywheel energy storage fly press forging force according to claim 2 is characterized in that described t ₀Initial plastic force P constantly ₀Equal 0.

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