CN209167186U - Contact resistance test machine - Google Patents

Abstract

The utility model provides a contact resistance testing machine, which belongs to the technical field of resistance testing. The contact resistance testing machine includes a base, a display touch screen, an ohmmeter and a fixing frame are fixed on the base, a test clip for testing resistance is arranged on the ohmmeter, and a detection device for detecting resistance is also arranged on the fixing frame, and the detection device includes an upper electrode, The lower electrode, the weighing transmitter, the weighing sensor and the installation cylinder, the weighing transmitter is fixed on the upper end of the fixing frame, the installation cylinder is set on the upper end of the fixing frame through the adjustment mechanism, the installation cylinder is located under the weighing The electrode is installed in the installation cylinder, the weighing sensor is fixed in the installation cylinder and abuts against the upper end of the upper electrode, the lower electrode is arranged on the base through a lifting mechanism, and an isolation sleeve is sleeved outside the lower electrode. The utility model has the advantages of high precision detection resistance and convenient operation.

Description

Contact Resistance Tester

technical field

The utility model belongs to the technical field of resistance detection, in particular to a contact resistance testing machine.

Background technique

Chemical conversion coating, also known as metal conversion coating. It is a reaction between the surface atoms of the metal (including the coating metal) and the anions in the medium to form a separation layer with good adhesion on the metal surface. This layer of compound separation layer is called a chemical conversion film. The formation of the conversion film can be either a pure chemical reaction between the metal and the medium, or an electrochemical reaction.

The traditional measurement method adopts manual method. During the measurement process, the resistance error is large and cannot be accurately measured. During the use of the upper electrode and the lower electrode, the pressure applied cannot be controlled, which affects the resistance test. During the process of applying pressure to the electrodes, the metal layer on the modeling surface is damaged, which directly affects the reliability of the test resistance.

SUMMARY OF THE INVENTION

The purpose of the utility model is to solve the above-mentioned problems in the prior art, and propose a contact resistance tester, which has the characteristics of high detection resistance and convenient operation.

The purpose of this utility model can be realized by following technical scheme:

The contact resistance testing machine includes a base, a display touch screen, an ohmmeter and a fixing frame are fixed on the base, and the ohmmeter is provided with a test clip for testing resistance, characterized in that, the fixing frame is also provided with a detection device for detecting resistance , the detection device includes an upper electrode, a lower electrode, a weighing transmitter, a weighing sensor and an installation cylinder, the weighing transmitter is fixed on the upper end of the fixed frame, and the installation cylinder is arranged on the upper end of the fixed frame through the adjustment mechanism, and the installation The cylinder is located under the weighing transmitter, the upper electrode is installed in the installation cylinder, the load cell is fixed in the installation cylinder and abuts against the upper end of the upper electrode, the lower electrode is set on the base through the lifting mechanism, and the outer sleeve of the lower electrode is An isolation sleeve is provided, the upper electrode is located just above the lower electrode, the lower electrode can be in contact with the upper electrode, and the load cell is connected with the load transmitter through a line.

The working principle of the utility model: the object to be measured is placed on the lower electrode, and then the lower electrode is driven upward through the lifting mechanism until the object to be measured abuts against the upper electrode, and the pressure on the object becomes 90.05kg±1%, Stop applying pressure, use an ohmmeter to test, and record the data manually after the ohmmeter display is stable. At the same time, through mechanical control, the pressure on the object is controlled at 90.05kg ± 1%, so as to avoid the instability of the force applied and lead to inaccurate measurement data. force data.

The utility model adopts a mechanical structure, which changes the inaccuracy of data caused by manual testing in the future, and improves the measurement accuracy.

In the above contact resistance testing machine, the adjustment mechanism includes a spherical bearing and a fixing column, the fixing column is fixed on the upper part of the fixing frame, the inner ring of the spherical bearing is fixedly connected with the fixing column, and the outer ring of the spherical bearing is Fixed connection with the mounting sleeve. During the measurement process, it is necessary to ensure that the upper electrode and the lower electrode are completely attached to the surface of the object to ensure the accuracy of the measurement. The upper electrode is fixedly connected to the mounting sleeve through a spherical bearing, and the upper electrode can be adjusted within a certain angle. The upper electrode is attached to the surface of the object.

In the above-mentioned contact resistance testing machine, a plurality of adjusting screws are threadedly connected to the mounting sleeve, and the ends of the adjusting screws can abut against the fixing column. After adjusting the orientation of the upper electrode, tighten the adjusting screw and abut against the fixed column, the spherical bearing cannot shake, and the upper electrode is fixed.

In the above contact resistance testing machine, an anti-rotation screw is threadedly connected to the mounting sleeve, and the end of the anti-rotation screw can abut against the upper electrode. Through the anti-rotation screw, the upper electrode can be prevented from rotating during the force application process.

In the above contact resistance testing machine, the lifting mechanism is a push rod motor. The lower electrode can be driven up and down by the push rod motor.

In the above contact resistance testing machine, the shape of the upper electrode and the lower electrode are the same. The contact area of the upper electrode and the lower electrode is equal, and the upper electrode and the lower electrode can be completely aligned, so as to improve the accuracy of measurement.

In the above-mentioned contact resistance testing machine, the material of the upper electrode and the lower electrode is red copper, and the surface roughness Ra is less than 0.4.

Compared with the prior art, the utility model has the following advantages:

1. Through mechanical control, the pressure on the object is controlled at 90.05kg ± 1%, so as to avoid the instability of the applied force and lead to inaccurate measurement data. to the force data. The utility model adopts a mechanical structure, which changes the inaccuracy of data caused by manual testing in the future, and improves the measurement accuracy.

2. The position of the upper electrode can be adjusted freely through the setting of the spherical bearing, so that the upper electrode and the lower electrode can be completely in contact with the surface of the object, and the measurement accuracy is improved.

3. The setting of the anti-rotation screw can prevent the upper electrode from rotating and destroying the metal coating on the surface of the object during the force application process.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic diagram of the upper electrode and the lower electrode in the present invention.

In the figure, 1. Base; 2. Display touch screen; 3. Ohmmeter; 4. Fixing frame; 5. Upper electrode; 6. Lower electrode; 7. Weighing transmitter; 8. Loading sensor; 9. Mounting cylinder ; 10, spherical bearing; 11, fixed column; 12, adjustment screw; 13, anti-rotation screw; 14, push rod motor.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figures 1 to 2, the contact resistance tester includes a base 1, on which a display touch screen 2, an ohmmeter 3 and a fixing frame 4 are fixed. The ohmmeter 3 has a test clip for testing resistance, and the fixing frame 4 Also provided with a detection device for detecting resistance, the detection device includes an upper electrode 5, a lower electrode 6, a weighing transmitter 7, a weighing sensor 8 and a mounting cylinder 9, and the weighing transmitter 7 is fixed on the upper end of the fixing frame 4, The installation cylinder 9 is arranged on the upper end of the fixing frame 4 through the adjustment mechanism, the installation cylinder 9 is located under the weighing transmitter 7, the upper electrode 5 is installed in the installation cylinder 9, and the load cell 8 is fixed in the installation cylinder 9 and is connected with the upper electrode. 5. The upper ends are abutted against each other, the lower electrode 6 is arranged on the base 1 through the lifting mechanism, the lower electrode 6 is sleeved with an isolation sleeve, the upper electrode 5 is located directly above the lower electrode 6, and the lower electrode 6 can be in contact with the upper electrode 5. The sensor 8 is connected to the weighing transmitter 7 through a line.

At the same time, through mechanical control, the pressure on the object is controlled at 90.05kg ± 1%, so as to avoid the instability of the applied force and lead to inaccurate measurement data. Force data.

The utility model adopts a mechanical structure, which changes the inaccuracy of data caused by manual testing in the future, and improves the measurement accuracy.

In the above contact resistance testing machine, the adjustment mechanism includes a spherical bearing 10 and a fixing column 11, the fixing column 11 is fixed on the upper part of the fixing frame 4, the inner ring of the spherical bearing 10 is fixedly connected with the fixing column 11, and the outer ring of the spherical bearing 10 is connected to the mounting column 11. The sleeves are fixedly connected. During the measurement process, it is necessary to ensure that the upper electrode 5 and the lower electrode 6 are completely attached to the surface of the object to ensure the accuracy of the measurement. Adjust the position so that the upper electrode 5 is in contact with the surface of the object.

In the above-mentioned contact resistance testing machine, a plurality of adjusting screws 12 are threadedly connected to the mounting sleeve, and the ends of the adjusting screws 12 can abut against the fixing post 11 . After the azimuth adjustment of the upper electrode 5 is completed, the adjusting screw 12 is tightened and abuts against the fixing column 11, the spherical bearing 10 cannot shake, and the upper electrode 5 is fixed.

In the above-mentioned contact resistance testing machine, an anti-rotation screw 13 is threadedly connected to the installation sleeve, and the end of the anti-rotation screw 13 can abut against the upper electrode 5 . The rotation prevention screw 13 can prevent the upper electrode 5 from rotating during the force application process. The surface metal layer is prevented from being damaged during the pressing process of the upper electrode 5 and the lower electrode 6 .

In the above contact resistance testing machine, the lifting mechanism is the push rod motor 14 . The lower electrode 6 can be moved up and down by the push rod motor 14 .

In the above-mentioned contact resistance tester, the upper electrode 5 and the lower electrode 6 have the same shape. The contact areas of the upper electrode 5 and the lower electrode 6 are equal, and the upper electrode 5 and the lower electrode 6 can be completely aligned, thereby improving the measurement accuracy.

In the above-mentioned contact resistance testing machine, the material of the upper electrode 5 and the lower electrode 6 is red copper, and the surface roughness Ra is less than 0.4.

The working principle of the utility model: the object to be measured is placed on the lower electrode 6, and then the lower electrode 6 is driven upward through the lifting mechanism until the object to be measured abuts against the upper electrode 5, and the pressure on the object becomes 90.05kg± 1%, stop applying pressure, test with ohmmeter 3, and record the data manually after the display of ohmmeter 3 is stable.

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but will not deviate from the spirit of the present invention or go beyond the appended claims the defined range.

Claims (7)

1. The contact resistance tester includes a base, a display touch screen, an ohmmeter and a fixing frame are fixed on the base, and the ohmmeter has a test clip for testing resistance, it is characterized in that, the described fixing frame is also provided with a tester for detecting resistance. A detection device, the detection device includes an upper electrode, a lower electrode, a weighing transmitter, a weighing sensor and an installation cylinder, the weighing transmitter is fixed on the upper end of the fixing frame, and the installation cylinder is arranged on the upper end of the fixing frame through an adjustment mechanism , the installation cylinder is located under the weighing transmitter, the upper electrode is installed in the installation cylinder, the load cell is fixed in the installation cylinder and abuts against the upper end of the upper electrode, the lower electrode is set on the base through the lifting mechanism, and the lower electrode The outer sleeve is provided with an isolation sleeve, the upper electrode is located just above the lower electrode, the lower electrode can be in contact with the upper electrode, and the load cell is connected with the load transmitter through a line. 2 . The contact resistance testing machine according to claim 1 , wherein the adjustment mechanism comprises a spherical bearing and a fixed column, the fixed column is fixed on the upper part of the fixed frame, and the inner ring of the spherical bearing is connected to the upper part of the fixed frame. 3 . The fixing column is fixedly connected, and the outer ring of the spherical bearing is fixedly connected with the mounting sleeve. 3 . The contact resistance testing machine according to claim 2 , wherein a plurality of adjusting screws are threadedly connected to the mounting sleeve, and the ends of the adjusting screws can abut against the fixing post. 4 . 4 . The contact resistance testing machine according to claim 3 , wherein an anti-rotation screw is threaded on the mounting sleeve, and the end of the anti-rotation screw can abut against the upper electrode. 5 . 5 . The contact resistance testing machine according to claim 1 , wherein the lifting mechanism is a push rod motor. 6 . 6 . The contact resistance testing machine according to claim 1 , wherein the upper electrode and the lower electrode have the same shape. 7 . 7 . The contact resistance testing machine according to claim 1 , wherein the material of the upper electrode and the lower electrode is red copper, and the surface roughness is that Ra is less than 0.4. 8 .