CN203621723U - Detector for strength of electric resistance welding joint - Google Patents

Abstract

The utility model relates to a detector for the strength of an electric resistance welding joint and belongs to the technical field of welding. The detector provided by the utility model is simple in structure, small in occupied space and convenient to carry; the accurate prediction of the bonding strength of the welding joint can be realized; information is collected and a prediction result is obtained by the detector; timely improvement is performed according to the prediction result; manpower and material resources are saved; the cost is reduced.

Description

A kind of electric resistance welding strength of joint checkout gear

Technical field

The utility model belongs to welding technology field, is specifically related to a kind of electric resistance welding strength of joint checkout gear.

Background technology

Electric resistance welding belongs to the one of Solid-State Welding, and the heat that test specimen to be welded relies on the resistance of self to produce will melt then and link into an integrated entity each other, and this being welded in plate sheet welding has and application widely.The formability of electric resistance welding joint and be mainly subject to the impact of related process parameter in resistance welding process in conjunction with situation, as welding current, weld interval, upsetting force, dwell time etc.The current research that affects rule with regard to welding procedure Welded Joints mechanical property also adopts traditional measurement technology, also be just the mechanical property of welding point under different technical parameters to be carried out to actual measurement, calculate corresponding data according to measurement result, determine optimised process.The numerous test of this armrest power frequency and the result that obtains, be difficult to meet the needs of present actual production and development in science and technology, need to expend a large amount of man power and materials, and the accuracy rate of measurement result and fluctuation larger.

Summary of the invention

The deficiency existing for prior art, a kind of electric resistance welding strength of joint of the utility model checkout gear, to reach the object that improves forecasting accuracy, reduces costs and use manpower and material resources sparingly.

A kind of electric resistance welding strength of joint checkout gear, comprise data acquisition chip, central processing unit and computer, also comprise for detection of the voltage transformer of welding machine operating voltage, for detection of the current transformer of welding machine operating current, for detection of the displacement transducer of welding machine translational speed, for detection of the temperature sensor of welding rod temperature, for detection of the humidity sensor of ambient humidity, for detection of frequency sensor and the filter circuit of welding machine operating frequency, wherein

Voltage transformer output connects the input of the first filter circuit, current transformer output connects the input of the second filter circuit, the output of displacement transducer connects the input of the 3rd filter circuit, the output of temperature sensor connects the input of the 4th filter circuit, the output of humidity sensor connects the input of the 5th filter circuit, the output of frequency sensor connects the input of the 6th filter circuit, the output of the first filter circuit, the output of the second filter circuit, the output of the 3rd filter circuit, the output of the 4th filter circuit, the output of the output of the 5th filter circuit and the 6th filter circuit is connection data acquisition chip Liu road input respectively, the output of data acquisition chip connects the input of central processing unit, the output of central processing unit connects the input of computer.

The utility model advantage:

A kind of electric resistance welding strength of joint of the utility model checkout gear, simple in structure, take up room little, easy to carry, can realize the Accurate Prediction of the bond strength of Welded Joints, predict the outcome by device Information Monitoring acquisition, improve in time according to predicting the outcome, save man power and material, reduce costs.

Accompanying drawing explanation

The strength of welded joint checkout gear overall structure block diagram of a kind of embodiment of Fig. 1 the utility model;

The filter circuit of a kind of embodiment of Fig. 2 the utility model;

The data acquisition of a kind of enforcement of Fig. 3 the utility model and transmission circuit figure;

The prediction strength of welded joint curve of a kind of embodiment of Fig. 4 the utility model and actual welding strength of joint curve map.

The specific embodiment

Below in conjunction with accompanying drawing, a kind of embodiment of the utility model is described further.

As shown in Figure 1, a kind of electric resistance welding strength of joint checkout gear, comprise data acquisition chip, central processing unit and computer, also comprise for detection of the voltage transformer of welding machine operating voltage, for detection of the current transformer of welding machine operating current, for detection of the displacement transducer of welding machine translational speed, for detection of the temperature sensor of welding rod temperature, for detection of the humidity sensor of ambient humidity, for detection of frequency sensor and the filter circuit of welding machine operating frequency;

In the utility model embodiment, voltage transformer summation current transformer is selected respectively JDG4-0.51000/100 model and LZJC-10Q1000/5 model, measures operating voltage and the operating current of electric welding machine; Adopt TEC displacement sensor speed of welding, temperature sensor adopts PCMini70 model, for measuring welding temperature; Humidity sensor adopts PCMini70 model, for measures ambient humidity; Frequency sensor adopts HFT100 model, for measuring frequency; For obtaining low-pass signal more accurately, as shown in Figure 2, add signal condition module, take LM305 as main acp chip composition signal amplification circuit.Wherein between 2 pin of LM305 and 4 pin, access one by 0.005uF electric capacity, effectively elimination high communication number, increases the accuracy of signal.The 4 pin ground connection of LM305,8 pin connect 5V working power.2 pin connect signal input part, and 1 pin connects signal output part.Central processing unit adopts singlechip chip, and singlechip chip is 8051 series digit signal processors, and clock frequency is 6MHz, and interface power supply is 5V; Data acquisition chip adopts ADC0809,8 passage 16 bit data acquisition chips are sampled and analog-to-digital conversion, by ± 5V power supply, because ADC0809 chip internal does not have clock source. the utility model selects to utilize address latch control inputs signal ALK that single-chip microcomputer 8051 provides after d type flip flop two divided-frequency. as the clock input of ADC0809.The ALK end of single-chip microcomputer 8051 is exported positive pulse regularly with 1/6 oscillation frequency clock.The clock frequency that has certain scope 10-1280kHz. event the utility model to get single-chip microcomputer because of the clock frequency of ADC0809 is 6MHz.The frequency of ALK end output is 1MHz, then is 500kHz after two divided-frequency, meets the requirement of ADC0809 to clock.

As shown in Figures 2 and 3, described voltage transformer output connects the input JWY of the first filter circuit, current transformer output connects the input JWY of the second filter circuit, the output of displacement transducer connects the input JWY of the 3rd filter circuit, the output of temperature sensor connects the input JWY of the 4th filter circuit, the output of humidity sensor connects the input JWY of the 5th filter circuit, the output of frequency sensor connects the input JWY of the 6th filter circuit, the output of the first filter circuit, the output of the second filter circuit, the output of the 3rd filter circuit, the output of the 4th filter circuit, the output of the output of the 5th filter circuit and the 6th filter circuit respectively IN-0 of connection data acquisition chip ADC0809 is held to IN-5, output D0～the D7 of data acquisition chip connects the input P00～P07 of central processing unit, the USB interface of computer converts the TXD of RS232 and single-chip microcomputer to through PL2303, RXD is connected.In Resistance Welding termination process, the electric signal in electric arc and molten bath is carried out synchronized sampling, maintenance, A/D via corresponding transformer or sensor by sampling A/D chip and is converted data signal to, send into calculating and data processing that single-chip microcomputer is classified, for welding personnel regulation and control are prepared;

As shown in Figure 4, prediction welding point bond strength index and actual bond strength exponential curve, predicated error is in ± 8%.

Claims (1)

1. an electric resistance welding strength of joint checkout gear, comprise data acquisition chip, central processing unit and computer, it is characterized in that, also comprise for detection of the voltage transformer of welding machine operating voltage, for detection of the current transformer of welding machine operating current, for detection of the displacement transducer of welding machine translational speed, for detection of the temperature sensor of welding rod temperature, for detection of the humidity sensor of ambient humidity, for detection of frequency sensor and the filter circuit of welding machine operating frequency, wherein

Voltage transformer output connects the input of the first filter circuit, current transformer output connects the input of the second filter circuit, the output of displacement transducer connects the input of the 3rd filter circuit, the output of temperature sensor connects the input of the 4th filter circuit, the output of humidity sensor connects the input of the 5th filter circuit, the output of frequency sensor connects the input of the 6th filter circuit, the output of the first filter circuit, the output of the second filter circuit, the output of the 3rd filter circuit, the output of the 4th filter circuit, the output of the output of the 5th filter circuit and the 6th filter circuit is connection data acquisition chip Liu road input respectively, the output of data acquisition chip connects the input of central processing unit, the output of central processing unit connects the input of computer.

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