CN2260372Y

CN2260372Y - Demagnetising apparatus connected with work piece channel

Info

Publication number: CN2260372Y
Application number: CN 96225484
Authority: CN
Inventors: 李国庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-15
Filing date: 1996-02-15
Publication date: 1997-08-20
Anticipated expiration: 2006-02-15

Abstract

The utility model belongs to demagnetizing apparatus connected with a work piece channel. A sensor of the utility model is arranged between a skeleton of a coil and a conducting wire coil. A control circuit comprises two blocks of controlled silicon which are reversely connected in parallel or a drive circuit, an output control drive circuit, and a train impulse flip-flop circuit whose angle of flow gradually becomes small which are realized by a phase modulation-typed solid-state relay. The drive circuit is connected with the coil and a power frequency electric network in series; the input terminal of the flip-flop circuit is connected with the output terminal of the sensor, and the output terminal is connected with the control terminal of the drive circuit. The utility model has the advantages of small volume, easy installation, alternating attenuation characteristic with uniform height and convenient maintenance.

Description

The demagnetizer that joins with workpiece material road

The utility model relates to a kind of workpiece demagnetizing apparatus, particularly the demagnetizer that joins with workpiece material road.

In industrial production, for race ring one class workpiece, after grinding machine processing, promptly having remanent magnetism, for guarantee technological requirement and product quality just must be before workpiece arrives next process will through moving back, the demagnetization processing.In order to make workpiece demagnetization operation become a link of whole processing work technology, thereby realize the demagnetization automatically working, such scheme is arranged in the prior art: adorn an air core coil on the material road of grinding machine transfer matic, also there is electric capacity at the coil two ends, constitute the LC oscillator; On material road, coil the place ahead, adorn a transducer, transducer start-up control circuit will be supplied with the Ac Dump of LC oscillator when treating workpiece arrival, so just produce an attenuation type vibration that causes by internal resistance, coil externally promptly produces the decay magnetic field of an alternation, and workpiece passes the demagnetization process that coil has promptly experienced one-period.But at present China's present situation is: the grinding machine unit operation, put compactness, do not have the transfer matic of corresponding connection, only being connected to very at the feed opening place, short-range missile draws the material road.Therefore if carry out technique scheme, coil not only will be installed, also want sensor installation, this certainly will will increase the space.In addition, owing to adopt the LC circuit, the electric capacity volume causes space problem more equally; And its frequency of oscillation is all directly related with coil inductance, internal resistance and capacitance parameter, and along with coil dimension changes, its frequency of oscillation and attenuation characteristic are inevitable different.

The utility model purpose is: overcome the deficiency of prior art, a kind of demagnetizer that joins with workpiece material road that is suitable at the widely used new structure of China is provided.

The utility model is achieved in that same as the prior art, comprise that the hollow solenoid, the control coil that are connected on the material road produce the control circuit of the alternating magnetic field of decaying, workpiece can be entered the hollow interior conversion of signals of coil is the transducer of control circuit enabling signal, is characterized in that:

A, transducer are loaded between the skeleton and conductor turns of coil,

B, control circuit comprise the drive circuit of being realized by the controllable silicon of two reverse parallel connections or phase modulation type solid-state relay, the continuous impulse circuits for triggering that the output control Driver Circuit angle of flow reduces gradually, drive circuit is connected in series mutually with coil, common frequency power network, and the input of circuits for triggering and transducer output join, output and drive circuit control end join.

With above-mentioned scheme implementation the utility model the time, can adopt the RC delay circuit that multistage counting/frequency divider is connected in series mutually, their each one of output serial connection increases delay time successively one by one to realize circuits for triggering.In addition, transducer can be contained in the middle place of coil.

The utility model advantage is: volume is little, be convenient to install, and has highly consistent alternation attenuation characteristic, is convenient to safeguard.

Fig. 1 is the utility model embodiment electricity theory diagram.

Fig. 2 is a loop construction schematic diagram in the utility model.

Fig. 3 is drive circuit figure in the utility model.

Fig. 4 is circuits for triggering figure in the utility model.

Below in conjunction with drawings and Examples the utility model is done further narration:

As seen from the figure, the utility model and common frequency power network 1 join, and himself comprise regulator rectifier circuit 6, circuits for triggering 5, drive circuit 2, air core coil 3 and transducer 4.

When implementing the utility model, be coil 3 to be added the labor and materials road as one section material road and workpiece join, this section material road should be downward-sloping.When workpiece enters coil 3 under action of gravity, be contained in the skeleton 7 of coil and the transducer 4 (referring to Fig. 2) between the conductor turns 3 promptly sends signal, start triggering circuit 5.Transducer is the middle place that is loaded on the coil two ends in this example.Transducer can adopt photoelectric type, induction or condenser type etc.

Fig. 3 has showed the concrete operating circuit of present embodiment.Drive circuit has adopted two controllable silicon T of reverse parallel connection ₁, T ₂, with it and the RC branch road that connects be used to prevent the controllable silicon false triggering.Controlling T by circuits for triggering ₁, T ₂The angle of flow gradually from large to small, thereby make the coil 3 that is connected in series mutually with controllable silicon and common frequency power network flow through with the power frequency alternation, by the pulsating current of default rule decay, coil 3 just can produce the corresponding alternation demagnetizing field that decays like this.The decay that workpiece should experience 30 above power frequency cycles at least just can be finished its demagnetization process.

Can take various ways as for circuits for triggering, as long as send corresponding continuous impulse to trigger the drive circuit angle of flow from large to small by certain attenuation law.Fig. 4 shows be this example adopt a kind of.IC ₁And IC ₂Be ten counting/frequency divider CD4017.Count pulse CR is through D ₁Rectification, W ₂The power frequency synchronizing signal of amplitude limit.IC ₃The standard monostable flipflop of forming by NE555.y ₁To y ₁₈With the delay circuit that yf is made up of comparator and RC circuit, comparator can be used LM324.y ₁To y ₁₈Every grade of delay time increases step by step, the angle of flow in respectively corresponding the 1st to 18 cycle.The delay time of yf equals half period, is used for the triggering of negative half period.

After sensor makes its conducting to lasso or bearing, IC ₂En effective, allow counting.The 1st cycle, q ₀Be high level; The 2nd cycle, q ₁Be high level; The 9th cycle, q ₉Make its en invalid on the one hand, make IC on the other hand ₁En effective.IC ₁Repeat aforementioned process.The 19th cycle, IC ₁Q ₉Make the en of oneself invalid, finish an angle of flow and reduce process gradually.

Claims

1, the demagnetizer that joins with workpiece material road, comprise that the hollow solenoid, the control coil that are connected on the material road produce the control circuit of the alternating magnetic field of decaying, workpiece can be entered the hollow interior conversion of signals of coil is the transducer of control circuit enabling signal, is characterized in that:

A, transducer are loaded between the skeleton and conductor turns of coil,

2, demagnetizer according to claim 1 is characterized in that: adopt the RC delay circuit that multistage counting/frequency divider is connected in series mutually, their each one of output serial connection increases delay time successively one by one to realize circuits for triggering.

3, demagnetizer according to claim 1 and 2 is characterized in that: transducer is contained in the middle place of coil.