CN105486478A

CN105486478A - Electronic hammer module

Info

Publication number: CN105486478A
Application number: CN201510894761.0A
Authority: CN
Inventors: 浦宏杰; 汪迪松; 陆勇; 李臻峰
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2016-04-13

Abstract

The invention discloses an electronic hammer module, which is formed by a hammer body and a hammer head. The hammer body is mainly formed by a yoke iron, a fixed iron core, a coil, a round iron pipe, a moving iron core, a lower housing, an aluminium connection body and a spring. The yoke iron forms a cavity to accommodate the coil; the coil is wound on the round iron pipe; and compression and release of the spring are controlled through attraction and separation of the fixed iron corn on the top end of the round iron pipe and the moving iron core capable of sliding in the round iron pipe. Under the effect of the restoring force of the spring, a hammer generates an impact force to stimulate a measured object; a force sensor on the top end of the hammer can measure the impact force of the hammer; and signals are transmitted to a computer in real time through DAQ to serve as excitation signals for mechanical structure modal analysis. The restoring force of the spring is utilized to generate the impact force; the generated impact force has higher stability and repeatability; and the electronic hammer module is in integrated miniature design, so that the hammer is compact in structure and can be used in a narrow and small space conveniently.

Description

Electrical force hammer module

Technical field

The present invention relates to a kind of electrical force hammer module, particularly relate to one and produce impact by electronic signal control, the reset of dependence electromagnetic actuation, spring-return power, and the electrical force with integral structure hammers module into shape.

Background technology

The normal transport function adopting hammering method to obtain physical construction in shock response test, thus obtain the intrinsic vibration characteristics of physical construction.Hammering method test is beaten by geodesic structure by the hammering of manual operation power usually, and the size and Orientation of hammer force is difficult to be consistent, and the actuation duration is difficult to control, repeatable poor.At present, more existing relevant power hammer system contemplates overcome the above problems, and as patent CN102879167.A discloses a kind of worktable type electronic impact hammer, produce repeatable impulsive force by the break-make controlling electric current in magnet coil; Patent CN104155076.A discloses a kind of working platform type ultromotivity hammer device, produces repeatably impulsive force by controlling motor belt motor power hammer.

On the one hand, utilize the attracting process of electromagnet to produce impulsive force, be easy to be subject to exciting current fluctuation and the impact of electromagnet self deterioration; On the other hand, current design is mostly worktable form, complex structure, and volume is comparatively large, is difficult to be applied at small space.Need a kind of impulsive force hammer device that can overcome above defect in current automatization test system badly, both there is higher stability and reliability, there is again good integration and Miniaturization Design, to adapt to compact space test environment.

Summary of the invention

The present invention proposes a kind of electrical force hammer module, to solve the stability of impulsive force and repeatable demand, and there is good integration and Miniaturization Design.In mould measurement, this electrical force can be utilized to hammer module into shape stable excitation is carried out to the physical construction of small space.

Above-mentioned electrical force hammer module is made up of hammer body and tup two parts, and the electromagnetic actuation controlled in hammer body cavity by input electrical signal is resetted, and Compress Spring keeps constant potential energy, makes tup produce constant impulsive force under the effect of spring-return power.

Above-mentioned hammer body is made up of yoke, fixed core, coil, round iron pipe, dynamic iron core, lower house, aluminium matter disjunctor and spring.

Above-mentioned yoke forms cavity to hold coil, and coil is around in round iron pipe, and round iron pipe top is fixed core, and the dynamic iron core corresponding with fixed core can slide in round iron pipe, by the adhesive between iron core and the compression and the reply that are separated control spring.

Above-mentioned aluminium matter disjunctor is made up of light material aluminium, is connected with dynamic iron core by bolt, reduces the inertial force of spring in compression and Recovery Process, to shorten shock pulse width, improves the speed of response of power hammer.

Above-mentioned spring is positioned between aluminium matter disjunctor and lower house, and spring-compressed, to aluminium matter disjunctor and lower house laminating, ensures that the decrement of each spring is the same, in the same size to guarantee that power hammers each impulsive force into shape.

Above-mentioned tup is made up of the force snesor of replaceable hammer head material and top, changes the tup material of unlike material to obtain the pumping signal of different-energy, and force snesor is for measuring impulsive force size when tup impacts.

Accompanying drawing explanation

The concrete structure schematic diagram of Fig. 1 electrical force hammer module

In Fig. 1: 1. yoke; 2. fixed core; 3. adhesive stroke; 4. coil; 5. dynamic iron core; 6. coupling bolt; 7. spring; 8. force snesor; 9. replaceable hammer head material; 10. aluminium matter disjunctor; 11. lower houses; 12. round iron pipes

Fig. 2 mould measurement controls response diagram

Embodiment

When energized, electric current is by producing magnetic around the coil on round iron pipe in upper shell, make the fixed core being fixed on round iron pipe top and the dynamic iron core acquisition magnetic can slided in round iron pipe, dynamic iron core and fixed core are pulled together, drive on the aluminium matter disjunctor that is connected by bolt with dynamic iron core and move, the spring-compressed between aluminium matter disjunctor and lower house.When deenergization, do not have electric current by upper shell around the coil on round iron pipe, do not produce magnetic, the fixed core being fixed on round iron pipe top is lost magnetism with the dynamic iron core that can slide in round iron pipe, because spring is under the effect of restoring force, drive the tup on aluminium matter disjunctor to impact to physical construction and produce impulsive force, to encourage the mode of physical construction.The signal that force snesor on tup exports is sent to computing machine through DAQ, as the pumping signal of input.General according to different test occasions, obtain different impulsive force spectrums by changing unlike material power hammer tup, to meet the mould measurement for different physical construction.Because the present invention utilizes the restoring force of spring to produce impulsive force, so impulsive force is very stable, the impulsive force can not hammered into shape because of electromagnet aging or current fluctuation influence power.

Further illustrate below in conjunction with accompanying drawing:

Electrical force hammer module automatically can be controlled by computer export pulse signal or pulse switch carries out Non-follow control, for pulse switch Non-follow control:

When pressing button on power lead, namely as accompanying drawing 2 mould measurement controls shown in response diagram, the control signal of input is now high level.Electric current is by producing magnetic around the coil (4) on round iron pipe (12) in yoke (1), make the fixed core (2) being fixed on round iron pipe (12) top and dynamic iron core (5) the acquisition magnetic can slided in round iron pipe (12), so the air-gap of (3) defines magnetic loop in yoke (1) and dynamic iron core (5) and adhesive stroke, fixed core (2) and dynamic iron core (5) are pulled together, and now adhesive stroke (3) is zero.Dynamic iron core (5) drives the aluminium matter disjunctor (10) be made up of light material aluminium to move up, spring (7) forced compression between aluminium matter disjunctor (10) and lower house (11) waits for excitation, with what guarantee spring each decrement size, spring (7) equally ensures that tup (9) impulsive force is in the same size till being compressed to aluminium matter disjunctor (10) and lower house (11) laminating at every turn.

When again pressing button on power lead, power supply and electrical force hammer module disconnect, and the control signal namely inputted is now low level.The fixed core (2) on round iron pipe (12) top and the dynamic iron core (5) that can slide in round iron pipe all lose magnetism, under spring (7) restoring force effect, aluminium matter disjunctor (10) drives tup (9) to impact to mechanical component, encourages physical construction.

After tup (9) excitation physical construction, the force snesor (8) had of tup (9) top can ergometry hammering blow time impulsive force size, signal is passed to computing machine by DAQ by force snesor (9) signal in real time, as pumping signal during physical construction model analysis.General force hammer tup can be changed to adapt to different physical construction mode and measure, and the tup of what the implementation case adopted is aluminum alloy material encourages melon and fruit surface.From accompanying drawing 2, when energized, input control signal is high level, and now spring (7) is in compressive state.When deenergization, input control signal is now low level, and spring (7) encourages melon and fruit surface under the effect of restoring force, and power hammer excitation pulse signal and the rear melon and fruit surface respond signal of excitation are all as shown in Figure 2.

Claims

1. an electrical force hammer module, it is characterized in that electrical force hammer module is made up of hammer body and tup (9) two parts, by the adhesive Compress Spring (7) of digital output modul fixed core (2) and dynamic iron core (5), the reply of spring (7) produces impulsive force, and size is gathered by force snesor (8).

2. hammer body according to claim 1, is characterized in that hammer body is made up of yoke (1), fixed core (2), coil (4), round iron pipe (12), dynamic iron core (5), lower house (11), aluminium matter disjunctor (10) and spring (7).

3. aluminium matter disjunctor (10) according to claim 2, it is characterized in that aluminium matter disjunctor (10) is made by light material aluminium, to reduce inertia in impact process, and be connected with dynamic iron core (5) by bolt (6).

4. spring according to claim 2 (7), it is characterized in that the impulsive force of electrical force hammer module is produced by spring (7) restoring force, tup (9) is under spring (7) restoring force effect, excitation is produced to test object, spring (7) is compressed to aluminium matter disjunctor (10) outward flange at every turn and contacts with lower house (11), ensures that the decrement of each spring (7) is identical.

5. tup according to claim 1 (9), it is characterized in that the tup (9) that Alternate materials and force snesor (8) form, replaceable different materials tup (9) is suitable for different test occasions, the force snesor (8) that tup (9) top has, impulsive force size during ergometry hammering blow.