CN202193819U - Vibratory stress relief and vibration level amplifying device - Google Patents

Abstract

The utility model discloses a vibratory stress relief and vibration level amplifying device, which consists of an upper support table, a lower chassis and a connecting rod, wherein the upper support table is used for mounting workpieces; the lower chassis is fixedly arranged on shock excitation table surface of a vibrating table; and the connecting rod is connected between the upper support table and the lower chassis. The cross section area of the connecting rod is less than that of the upper support plate; and the cross section area of the connecting rod is less than that of the lower chassis. The vibratory stress relief and vibration level amplifying device has the beneficial effects of remarkably amplifying the vibration level of the shock excitation table surface of the vibrating table, improving the effect of the high-frequency vibratory stress relief removing the residual stress; moreover, the structure is simple and practicable and the operation is convenient.

Description

The oscillating aging grade multiplying arrangement that shakes

Technical field

The utility model relates to a kind of oscillating aging grade multiplying arrangement that shakes.

Technical background

Effect technique is sought the natural frequency of workpiece through the mode of frequency sweep during the low frequency subresonance, but because rotating speed of motor is limited, and when the natural frequency of workpiece surpasses the range of frequency of vibrator, low frequency subresonance timeliness can't be carried out effective ageing treatment to workpiece.At present, effect technique is that the ageing treatment of the miniature workpiece of high natural frequency has indicated direction during based on the high-frequency vibration of shaking table, and level is less but high-frequency vibrating table output is shaken; Embarrass workpiece that enough big dynamicstress is provided; For this reason, the utility model has designed a kind of oscillating aging grade multiplying arrangement that shakes, the level of shaking that can amplify shaking table exciting table top significantly; For workpiece provides enough big dynamicstress, improved the effect of high-frequency vibration timeliness elimination unrelieved stress.Simultaneously, present technique also can be used in the high-frequency vibration welding.

The utility model content

For solve high-frequency vibrating table output shake level less, embarrass workpiece that the deficiency of dynamicstress greatly is provided enough; The utility model has designed a kind of level of shaking that can amplify shaking table exciting table top significantly, and improves the high-frequency vibration timeliness and eliminates the oscillating aging of the unrelieved stress effect grade multiplying arrangement that shakes.

The oscillating aging grade multiplying arrangement that shakes; Form by the last saddle that workpiece is installed, the connecting rod that is fixed on the low bottom-disc on the shaking table exciting table top and connects saddle and low bottom-disc; The section area of described connecting rod is less than the described section area of going up saddle, and the section area of described connecting rod is less than the section area of described low bottom-disc.

Further, described upward saddle, connecting rod and low bottom-disc are one-body molded.

Perhaps, described connecting rod two ends are affixed through fastening piece and last saddle and low bottom-disc respectively.

Further, described upward saddle and low bottom-disc are symmetric figure, and the barycenter of last saddle and low bottom-disc overlaps with the symmetry centre of last saddle and low bottom-disc respectively, and described connecting rod axis passes through the barycenter of last saddle and low bottom-disc respectively.

Further, described upward saddle and low bottom-disc are all in the form of annular discs.

The technical conceive of the utility model is: low bottom-disc is fixed on the shaking table exciting table top, and the connecting rod lower end connects low bottom-disc, the upper end connects upward saddle, and last saddle is used to install workpiece, thereby forms grade multiplying arrangement that shakes.Described upward saddle and low bottom-disc are symmetric figure; The barycenter of last saddle and low bottom-disc overlaps with the symmetry centre of last saddle and low bottom-disc respectively; Through the barycenter of last saddle and low bottom-disc, the section area of more described upward saddle of the section area of described connecting rod and low bottom-disc is all little respectively for described connecting rod axis, and the less connecting rod of section area has less rigidity like this; The described grade multiplying arrangement that shakes can equivalence be two quality-spring damping model; Wherein the connecting rod equivalence is elastic element and the damping element c of rigidity k, and last saddle (comprising workpiece) equivalence is lumped mass m, and low bottom-disc (involving vibrations platform moving parts) equivalence is lumped mass M.When system works during in this model resonant frequency, model resonates, and last saddle m shakes level will be greater than the low bottom-disc M level of shaking, thus the effect that the level that realizes shaking is amplified.

Suppose that low bottom-disc simple harmonic motion displacement is y, last saddle simple harmonic motion displacement is x, and then the equation of motion of this pair quality-spring damping model does

The equation of motion of this model is the equation of motion of the forced vibration that causes of typical foundation motion, and wherein low bottom-disc can be considered the basis.Can know by the linear vibration theory; Under foundation motion y (t)=Ysin ω t excitation; Grade multiplying arrangement that shakes can produce and encourage the simple harmonic motion of the lagging phase angle of same frequency

, i.e.

Adopt complex exponential method to find the solution, use Ye ^{J ω t}Replacement Ysin ω t uses

Replacement

Here

Comprise phase angle

Information. with Ye ^{J ω t}With

Substitution (1),

$-m{\mathrm{\ω}}^2\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}+\mathrm{j\ωc}\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}+k\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}=\mathrm{j\ω}{\mathrm{Yce}}^{\mathrm{j\ωt}}+{\mathrm{kYe}}^{\mathrm{j\ωt}}---\left(2\right)$

By (2),

$\frac{\stackrel{\‾}{X}}{Y}=\frac{k+\mathrm{j\ωc}}{k-{\mathrm{m\ω}}^2+\mathrm{j\ωc}}---\left(3\right)$

By (3),

$\frac{X}{Y}=\sqrt{\frac{1+{\left(2\mathrm{\ζr}\right)}^2}{{(1-r^2)}^2+{\left(2\mathrm{\ζr}\right)}^2}}---\left(4\right)$

In the formula: subsidence ratio

Frequency ratio r=ω/ω _n, resonant frequency wherein

Natural frequency

When ζ was constant, X/Y obtained peak when excitation frequency equals system resonance frequency (r=1), and last saddle displacement will be greater than low bottom-disc (basis) displacement.The forced vibration theory that the utility model utilizes foundation motion to cause just designs.

When shaking table carries out high-frequency excitation to workpiece, grade multiplying arrangement that shakes can amplify shaking table exciting table top significantly when resonance the level of shaking, thus improve the effect that the high-frequency vibration timeliness is eliminated unrelieved stress.

The beneficial effect of the utility model is: can amplify the level of shaking of shaking table exciting table top during resonance significantly, improve the effect that the high-frequency vibration timeliness is eliminated unrelieved stress, and simple and practical, easy to operate.

Description of drawings

Fig. 1 grade multiplying arrangement synoptic diagram that shakes.

Fig. 2 grade multiplying arrangement scheme of installation that shakes.

The shake two quality of equivalence-spring damping model of grade multiplying arrangement of Fig. 3.

A Fig. 4 grade multiplying arrangement grade amplified curve that shakes that shakes.

Embodiment

Embodiment one

With reference to Fig. 1-4

The oscillating aging grade multiplying arrangement that shakes; Form by the last saddle 1 that workpiece is installed, the connecting rod 2 that is fixed on the low bottom-disc 3 on the shaking table exciting table top 4 and connects saddle 1 and low bottom-disc 3; The upper end of described connecting rod 2 and last saddle are 1 affixed, lower end and low bottom-disc 3 are affixed; The section area of described connecting rod 2 is less than the described section area of going up saddle 1, and the section area of described connecting rod 2 is less than the section area of described low bottom-disc 3.

Described upward saddle 1, connecting rod 2 and low bottom-disc 3 are one-body molded.

The described saddle 1 of going up is symmetric figure with low bottom-disc 3, and the barycenter of last saddle 1 and low bottom-disc 3 overlaps with the symmetry centre of last saddle 1 and low bottom-disc 3 respectively, and described connecting rod 2 axis pass through the barycenter of last saddle 1 and low bottom-disc 3 respectively.

Described upward saddle 1 is all in the form of annular discs with low bottom-disc 3.

The technical conceive of the utility model is: low bottom-disc 3 is fixed on the shaking table exciting table top 4, and connecting rod 2 lower ends are fixed on the low bottom-disc 3, and last saddle 1 is fixed in the upper end of connecting rod 2, thereby forms grade multiplying arrangement that shakes.The described saddle 1 of going up is symmetric figure with low bottom-disc 3; The barycenter of last saddle 1 and low bottom-disc 3 overlaps with the symmetry centre of last saddle 1 and low bottom-disc 3 respectively; Described connecting rod 2 axis pass through the barycenter of last saddle 1 and low bottom-disc 3 respectively; The section area of more described upward saddle 1 of the section area of described connecting rod 2 and low bottom-disc 3 is all little; The less connecting rod 2 of section area has less rigidity like this, and the described grade multiplying arrangement that shakes can equivalence be two quality-spring damping model, and wherein connecting rod 2 equivalences are elastic element and the damping element c of rigidity k; Last saddle 1 (comprising workpiece A) equivalence is lumped mass m, and low bottom-disc 3 (involving vibrations platform moving parts B) equivalence is lumped mass M.When system works during in this model resonant frequency, model resonates, and last saddle m shakes level will be greater than the low bottom-disc M level of shaking, thus the effect that the level that realizes shaking is amplified.

Suppose that low bottom-disc 3 simple harmonic motion displacements are y, last saddle 1 simple harmonic motion displacement is x, and then the equation of motion of this pair quality-spring damping model does

The equation of motion of this model is the equation of motion of the forced vibration that causes of typical foundation motion, and wherein low bottom-disc 3 can be considered the basis.Can know by the linear vibration theory; Under foundation motion y (t)=Ysin ω t excitation; Grade multiplying arrangement that shakes can produce and encourage the simple harmonic motion of the lagging phase angle of same frequency

, i.e.

Adopt complex exponential method to find the solution, use Ye ^{J ω t}Replacement Ysin ω t uses Replacement

Here

Comprise phase angle

Information. with Ye ^{J ω t}With

Substitution (1),

$-m{\mathrm{\ω}}^2\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}+\mathrm{j\ωc}\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}+k\stackrel{\‾}{X}{e}^{\mathrm{j\ωt}}=\mathrm{j\ω}{\mathrm{Yce}}^{\mathrm{j\ωt}}+{\mathrm{kYe}}^{\mathrm{j\ωt}}---\left(2\right)$

By (2),

$\frac{\stackrel{\‾}{X}}{Y}=\frac{k+\mathrm{j\ωc}}{k-{\mathrm{m\ω}}^2+\mathrm{j\ωc}}---\left(3\right)$

By (3),

$\frac{X}{Y}=\sqrt{\frac{1+{\left(2\mathrm{\ζr}\right)}^2}{{(1-r^2)}^2+{\left(2\mathrm{\ζr}\right)}^2}}---\left(4\right)$

In the formula: subsidence ratio

Frequency ratio r=ω/ω _n, resonant frequency wherein

Natural frequency

When ζ was constant, X/Y obtained peak when excitation frequency equals system resonance frequency (r=1), and last saddle 1 displacement will be greater than low bottom-disc 3 (basis) displacement.The forced vibration theory that the utility model utilizes foundation motion to cause just designs.

When shaking table carries out high-frequency excitation to workpiece, grade multiplying arrangement that shakes can amplify shaking table exciting table top significantly when resonance the level of shaking, thus improve the effect that the high-frequency vibration timeliness is eliminated unrelieved stress.

Last saddle 1, connecting rod 2 and low bottom-disc 3 are one-body molded, and last saddle, connecting rod and low bottom-disc are done as a whole, and vibration signal is the part interior transmission at global formation, and its grade amplification effect that shakes is good.

The beneficial effect of the utility model is: can amplify the level of shaking of shaking table exciting table top during resonance significantly, improve the effect that the high-frequency vibration timeliness is eliminated unrelieved stress, and simple and practical, easy to operate.

Embodiment two

The difference of present embodiment and embodiment one is: described connecting rod 2 is affixed with low bottom-disc 3 with last saddle 1 respectively through fastening piece.All the other are all identical.

Connect connecting rod and last saddle, low bottom-disc through fastening piece, three parts can be processed respectively, and easy to process, tooling cost is low.

The described content of this specification sheets embodiment only is enumerating the way of realization of utility model design; The protection domain of the utility model should not be regarded as and only limit to the specific form that embodiment states, the protection domain of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.

Claims (5)

1. the oscillating aging grade multiplying arrangement that shakes; It is characterized in that: form by the last saddle that workpiece is installed, the connecting rod that is fixed on the low bottom-disc on the shaking table exciting table top and connects saddle and low bottom-disc; The section area of described connecting rod is less than the described section area of going up saddle, and the section area of described connecting rod is less than the section area of described low bottom-disc.

2. the oscillating aging as claimed in claim 1 grade multiplying arrangement that shakes is characterized in that: described to go up saddle, connecting rod and low bottom-disc one-body molded.

3. the oscillating aging as claimed in claim 1 grade multiplying arrangement that shakes is characterized in that: described connecting rod two ends are affixed through fastening piece and last saddle and low bottom-disc respectively.

4. like the described oscillating aging of one of the claim 1-3 grade multiplying arrangement that shakes; It is characterized in that: described upward saddle and low bottom-disc are symmetric figure; The barycenter of last saddle and low bottom-disc overlaps with the symmetry centre of last saddle and low bottom-disc respectively, and described connecting rod axis passes through the barycenter of last saddle and low bottom-disc respectively.

5. the oscillating aging as claimed in claim 4 grade multiplying arrangement that shakes is characterized in that: described go up saddle and low bottom-disc all in the form of annular discs.

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