CN202393870U - Electric breakdown testing device for oxidation film of engine part - Google Patents
Electric breakdown testing device for oxidation film of engine part Download PDFInfo
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- CN202393870U CN202393870U CN2011205311282U CN201120531128U CN202393870U CN 202393870 U CN202393870 U CN 202393870U CN 2011205311282 U CN2011205311282 U CN 2011205311282U CN 201120531128 U CN201120531128 U CN 201120531128U CN 202393870 U CN202393870 U CN 202393870U
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- potentiometer
- rectifier bridge
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Abstract
The utility model relates to an electric breakdown testing device for an oxidation film of an engine part. The device is characterized in that the rear ends of probes TP1 and TP2 are connected with an output end of an adjustable alternating current power supply VT1 by a current-limiting resistor R1; the rear ends of the two probes are further connected with a rectification voltage-stabilizing circuit consisting of a rectification bridge VD2, a capacitor C2, resistors R4 and R6 and a voltage-stabilizing tube DW2; a resistor R5 and a potentiometer W2 are connected in series and then connected with the DW2 in parallel, and the output end of the W2 is connected with a reverse input end of a comparator LM339; the output end of the VT1 is further connected with a voltage-stabilizing circuit consisting of a rectification bridge VD1, a capacitor C1, resistors R1 and R3 and a voltage-stabilizing tube DW1; a resistor R2 and a potentiometer W1 are connected in series and then connected with the DW1 in parallel, and the output end of the W1 is connected with the forwarding input end of the comparator LM339; and the output end of the comparator is connected with a sound alarm circuit and a light alarm circuit respectively. The electric breakdown testing device for the oxidation film of the engine part has the advantages that structure is simple, operation is simple and convenient, carry is convenient, error detection is difficult to occur, detection efficiency is high, and the like.
Description
Technical field
The utility model relates to the electric breakdown method metal processing piece surface film oxide is detected, and is specially a kind of engine part oxide film puncture test device.
Background technology
Certain engine part, its surface need form oxide film through anodic oxidation.The thickness of this oxide film, surface state, sealing effectiveness, drying and degree of aging are the principal elements that influences the oxidation film layer quality.Closely related because of the insulating property of these factors and oxide film, according to manufacturing requirements, mainly adopt the disruptive potential method to carry out to the quality testing of oxide film, promptly confirm through the voltage breakdown of measuring oxide film whether the quality of oxide film reaches technical requirement.In view of domestic the coating mass special inspecting equipment that adopts the puncture test method to this engine part is not arranged at present,, detect through changing given voltage so can only use electrode probe and easy resistance box.In the testing process, the operator need confirm the voltage breakdown set-point through the resistance that changes resistance box, and needs in operating process, observe at any time the variation of two voltage tables, rule of thumb judges the overproof situation of workpiece.This detection method complex operation, it is bigger influenced by human factor, and very high to operator's requirement, the flase drop that causes because of human factor happens occasionally.Simultaneously the used checkout equipment of the detection method of this backwardness is bulky, carries inconvenience.
The utility model content
The purpose of the utility model be to the shortcoming of above-mentioned prior art for certain engine part surface film oxide quality testing provide a kind of simple in structure, use oxide film puncture test device easy and simple to handle.
For realizing above-mentioned purpose, the engine part oxide film puncture test device that the utility model provides comprises two electrode probe TP1 and TP2, and the rear end of two probe TP1 and TP2 joins through the output terminal of current-limiting resistance R1 and adjustable ac source VT1; The rear end of two probes also joins with the input end of rectifier bridge VD2; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 2, resistance R 4, R6 and stabilivolt DW2; Resistance R 5 and potentiometer W2 series connection back and stabilivolt DW2 also connect, and the reverse input end of the output terminal of potentiometer W2 and comparer LM339 ("-" end) joins; The output terminal of adjustable ac source VT1 also joins with the input end of rectifier bridge VD1; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 1, resistance R 1, R3 and stabilivolt DW1; Resistance R 2 and potentiometer W1 series connection back and stabilivolt DW1 also connect, and the positive input of the output terminal of potentiometer W1 and comparer LM339 ("+" end) joins; The output terminal of comparer LM339 joins with audible alarm circuit that is made up of diode D1, resistance R 8, triode VT and alarm relay J and the light warning circuit that is made up of resistance R 7 and luminotron diode D2 respectively; Input end at rectifier bridge VD1 and VD2 is connected to voltage table PV1 and PV2 respectively.
The principle of work of the utility model engine part oxide film puncture test device is: before the detection; Require to pass through earlier adjustable ac source VT1 to given voltage (by voltage table PV1 indication) and voltage breakdown (by voltage table PV2 indication) sampling according to detecting; Sampling current is respectively through the rectifier bridge rectification; Sampling current after the rectification is compared by comparer LM339; Make the positive and negative two ends of comparer balance through regulator potentiometer W1 and W2, no-output, the sound light alarming circuit that is connected with comparator output terminal is not worked.During detection; The front end sphere of two probes is touched oxide film to be detected, this moment seized workpiece the oxide film voltage breakdown as greater than the voltage breakdown standard value, workpiece can not puncture; The electrode two ends are equivalent to open circuit; Comparer is kept former no-output state, and sound light alarming circuit is not worked, and representes that seized workpiece coating mass is qualified; The oxide film voltage breakdown of seized workpiece is as less than the voltage breakdown standard value; Workpiece is breakdown; The input voltage of rectifier bridge VD2 makes comparer produce output less than the input voltage of rectifier bridge VD1, sound light alarming circuit conducting simultaneously; Send the sound and light alarm signal simultaneously, represent that the coating mass of seized workpiece detects defective.
Compared with prior art, the utility model has the advantages that:
1, simple in structure, volume is little, is easy to carry;
2, use is easy and simple to handle, judges the overproof of workpiece by the sound and light alarm signal, and the human factor influence is little, is difficult for taking place the flase drop phenomenon;
When 3, being used for batch detection, can improve detection efficiency greatly.
Description of drawings
Fig. 1 is the utility model engine part oxide film puncture test device testing circuit schematic diagram;
The synoptic diagram of Fig. 2 for popping one's head among Fig. 1.
Embodiment
In conjunction with Fig. 1 and Fig. 2, two electrode probe TP1 of the utility model engine part oxide film puncture test device and TP2 are as shown in Figure 2, are round bar shape; Process by red copper; Be of a size of φ 8 * 150, its front end (with the oxide film contact jaw) is spherical, 7 millimeters of diameters; Except that with sphere that oxide film contacts, remainder cover electro-insulating rubber pipe.The rear end of two probes joins through the output terminal of wiring hole through current-limiting resistance R1 and 50Hz 220V adjustable ac source VT1, and VT1 adopts contact from even pressure regulator manual adjustments; The rear end of the input end of rectifier bridge VD2 and two probes joins; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 2, resistance R 4, R6 and stabilivolt DW2; Resistance R 5 and potentiometer W2 series connection back and stabilivolt DW2 also connect, and the reverse input end of the output terminal of potentiometer W2 and comparer LM339 ("-" end) joins; The output terminal of adjustable ac source VT1 also joins with the input end of rectifier bridge VD1; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 1, resistance R 1, R3 and stabilivolt DW1; Resistance R 2 and potentiometer W1 series connection back and stabilivolt DW1 also connect, and the positive input of the output terminal of potentiometer W1 and comparer LM339 ("+" end) joins; The output terminal of comparer LM339 joins with the audible alarm circuit (alarm buzzer does not show among the figure) that is made up of diode D1, resistance R 8, triode VT and alarm relay J with by resistance R 7 and the light warning circuit that luminotron diode D2 constitutes respectively; At the input end of rectifier bridge VD1 and VD2 respectively and meet A.C. voltmeter PV1 and PV2.
Components and parts in the foregoing circuit except that probe, all are installed in a cabinet inside, and fuse protection is set.Power switch, power light, probe connection terminal, voltage table, measurement starting switch are set on the control box panel, measure startup pilot lamp and sound and optic signal indicating device.During use two electrode probes are inserted the probe connection terminal, keep probe under smooth taint-free condition, to detect.When sphere is placed on the surface of anodic oxidation workpiece, is applied to and makes a concerted effort that (the probe quality is 50g～100g) for 0.5N～1.0 N on the rete.Workpiece must well contact with measuring sonde, and guarantees that its electric conductivity is good.After taking place, each puncture all must clean the probe surface of contact; And must current potential be made zero deenergization before especially cleaning probe after each the mensuration.
Claims (1)
- , a kind of engine part oxide film puncture test device, comprise two electrode probe TP1 and TP2, it is characterized in that: the rear end of said two probe TP1 and TP2 joins through the output terminal of current-limiting resistance R1 and adjustable ac source VT1; The rear end of two probes also joins with the input end of rectifier bridge VD2; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 2, resistance R 4, R6 and stabilivolt DW2; Resistance R 5 and potentiometer W2 series connection back and stabilivolt DW2 also connect, and the reverse input end of the output terminal of potentiometer W2 and comparer LM339 joins; The output terminal of adjustable ac source VT1 also joins with the input end of rectifier bridge VD1; The output terminal of this rectifier bridge joins with the mu balanced circuit that is made up of capacitor C 1, resistance R 1, R3 and stabilivolt DW1; Resistance R 2 and potentiometer W1 series connection back and stabilivolt DW1 also connect, and the positive input of the output terminal of potentiometer W1 and comparer LM339 joins; The output terminal of comparer LM339 joins with audible alarm circuit that is made up of diode D1, resistance R 8, triode VT and alarm relay J and the light warning circuit that is made up of resistance R 7 and luminotron diode D2 respectively; Input end at rectifier bridge VD1 and VD2 is connected to voltage table PV1 and PV2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205311282U CN202393870U (en) | 2011-12-16 | 2011-12-16 | Electric breakdown testing device for oxidation film of engine part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205311282U CN202393870U (en) | 2011-12-16 | 2011-12-16 | Electric breakdown testing device for oxidation film of engine part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202393870U true CN202393870U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205311282U Expired - Fee Related CN202393870U (en) | 2011-12-16 | 2011-12-16 | Electric breakdown testing device for oxidation film of engine part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202393870U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913684A (en) * | 2014-04-10 | 2014-07-09 | 安徽铜峰电子股份有限公司 | Film electric weak point test statistical system and test method based on AD module output |
-
2011
- 2011-12-16 CN CN2011205311282U patent/CN202393870U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913684A (en) * | 2014-04-10 | 2014-07-09 | 安徽铜峰电子股份有限公司 | Film electric weak point test statistical system and test method based on AD module output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20161216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |