KR100902567B1 - A jig for terminal bending strength test - Google Patents

Abstract

It is convenient to apply any terminal sample to solve the cost, sample burnout, etc. caused by immobilization according to the size and size of each terminal sample by fixing the sample according to the size of the sample when testing the bending strength of the terminal. A jig for testing terminal flexural strength is disclosed. The jig for terminal flexural strength test according to the present invention is formed on the upper surface of the bed of the universal testing machine. The jig includes a bottom fixing plate mounted on the upper surface of the bed portion, a body formed on the upper surface of the bottom fixing plate, a shaft into which a lower portion is inserted and pinned onto the upper surface of the body, and inserted into the upper portion of the shaft to fix the terminal sample. It consists of a vice part. At this time, the vise part has a fixed plate inserted into the upper portion of the shaft seated, a movable plate elastically supported on the fixed plate while being inserted into the upper portion of the shaft, and a tightening lever for screwing up and down the movable plate selectively while being screwed to the upper end of the shaft. And it is preferable that two or more guide rods protruding from the upper surface of the fixed plate to penetrate the movable plate are inserted into the guide rods.

Description

Jig for terminal bending strength test

The present invention relates to a jig for testing terminal flexural strength used in universal testing machine, and more particularly to a terminal flexural strength test for confirming the minimum level of terminal force that can withstand bending or breakage during crimping, assembling or using the terminal. It's about the jig.

In general, a terminal for smoothly connecting wires is used for connectors used in various wirings and electronic components.

As shown in FIG. 1, the terminal includes a covering accommodation portion 2 surrounding the outer shell of the wire, a wire accommodation portion 3 for pressing and energizing the inner wire of the wire, and a terminal portion 4 inserted into a connector of an electronic component. Is made of.

At this time, the wire accommodating part 3 and the terminal part 4 are easily broken due to inadvertent use, vibration, or the like, so that they are released after being tested to have an appropriate flexural strength.

The universal material tester is used to measure the bending strength of the terminal. The universal material tester is a guide extending vertically from both sides of the bed portion 11 and the upper surface of the bed portion 11 as shown in FIG. Both ends 12 and the guide portion 12, the lifting portion 13 to move up and down reciprocating, and is mounted on the lower surface of the lifting portion 13 to compress the sample seated on the bed portion 11 or A squeezing unit 16 for tensioning, an intensity measuring unit 14 for measuring the compressive or tensile strength of the squeezing unit 16, and an arithmetic output unit 15 for monitoring the value measured by the strength measuring unit 14 Is made of. After fixing the terminal by attaching a fixed jig to the bed portion 11 of the universal testing machine 10, and then replaces the bite 16 with a compression rod to test.

However, the existing jig for fixing the terminal has a variety of sizes depending on the purpose of use of the terminal, there was a problem to run the test by making a fixed jig according to the specifications of each terminal.

Or, most of the existing fixed jigs were retracted from the left and right sides of the jig was used. The terminal flexural strength test is a form of pressing the compression rod from the top to the bottom, so that the existing fixed jigs held at the left and right are accurate bends. There was a problem in not testing the strength. That is, when the bite direction of the jig holding the terminal bites from the left and right, there is a problem that the terminal is pulled out by the pressing force of the compression rod pressed from above.

The present invention has been made to solve the above problems, an object of the present invention is to enable the fixing of the sample according to the size of the sample when testing the bending strength of the terminal according to the manufacture and size of the jig according to each terminal sample In order to solve the cost caused by non-fixation, sample burnout, etc., it is to provide a jig for testing terminal flexural strength, which can be conveniently applied to any terminal sample.

The present invention to achieve the above object,

A bottom fixing plate mounted on the upper surface of the bed of the universal testing machine;

A body formed on an upper surface of the bottom fixing plate;

A shaft which is pinned by inserting a lower portion onto an upper surface of the body; And

And a vise having a fixed plate inserted into the upper part of the shaft and seated therein, a movable plate inserted into the upper part of the shaft to be elastically supported on the fixed plate, and a tightening lever for screwing up and down the movable plate selectively up and down. A jig for testing terminal flexural strength is provided.

Jig for bending test terminal according to the present invention is made to accommodate all the terminal samples of various specifications, in particular, there is an advantage that the bite of the sample is good and easy to operate to obtain an accurate test data.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

The present invention, the bottom fixing plate mounted on the upper surface of the bed portion of the universal testing machine;

A body formed on an upper surface of the bottom fixing plate;

A shaft which is pinned by inserting a lower portion onto an upper surface of the body; And

And a vise having a fixed plate inserted into the upper part of the shaft and seated therein, a movable plate inserted into the upper part of the shaft to be elastically supported on the fixed plate, and a tightening lever for screwing up and down the movable plate selectively up and down. A jig for testing terminal flexural strength is provided.

In addition, the upper surface of the body is inserted into the lower portion of the shaft is seated on the upper surface of the body, the outer peripheral surface may further include a flow preventing plate for fastening one or more fixing bolts to prevent the shaft shake.

In addition, it is preferable that two or more guide rods protruding from the upper surface of the fixed plate to penetrate the movable plate are inserted into the guide rods.

And the upper side of the shaft is extended to a diameter smaller than the body is fixed to the seat is inserted, it is preferable that at least one fixing bolt is fastened on the outer peripheral surface of the fixing plate to fix the fixing plate to the shaft.

Hereinafter, a jig for testing terminal flexural strength according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 2 is a view showing a universal testing machine for showing the state that the jig for mounting the terminal bending test according to the present invention.

Referring to FIG. 2, the universal testing machine 10 includes a bed portion 11, a guide portion 12 extending vertically upward on both sides on an upper surface of the bed portion 11, and both ends of the guide portion 12. Compression of the elevating portion 13 for vertically reciprocating movement along the guide portion 12, the strength measuring portion 14 for measuring the tension and compressive strength of the elevating portion 13, and the strength measuring portion 14. Computation output unit 15 for monitoring the strength or tensile strength. Here, the jig 100 for the terminal bending test according to the present invention is mounted to the bed portion 11. And since the present invention is for the terminal bending test, the compression rod 20 for pressing the terminal on the lower surface of the elevating portion 13 is mounted.

3 is an exploded perspective view illustrating a terminal bending test jig of the present invention shown in FIG. 2, and FIG. 4 is an exploded perspective view illustrating the terminal bending test jig of FIG. 3.

3 and 4, the jig 100 for the terminal bending test includes a bottom fixing plate 110, a body 120, a shaft 140, and a vise part 150.

The bottom fixing plate 110 is to be placed in the upper portion of the bed 11, a plurality of screw holes 17 are formed in the center on the upper surface of the bed 11 (see Fig. 2), the bottom fixing plate 110 The fixing bolt 112 corresponding to the screw hole 17 is formed. The vertical body 120 is integrally formed on the upper surface of the bottom fixing plate 112. Body 120 has a predetermined height, the insertion hole 122 is formed on the upper surface downward. The shaft 140 is coupled to the upper portion of the body 120 formed as described above.

Shaft 140 is coupled to the lower portion is inserted into the insertion hole 122 of the body 120. The body 120 and the shaft 140 coupled as described above prevent the separation of the shaft 140 by the pin 147. Here, the flow preventing plate 130 is further coupled to the upper portion of the body 120 to prevent the shaft 140 from shaking after the shaft 140 is inserted into the body 120. That is, the flow preventing plate 130 is seated on the upper surface of the body 120 as the shaft 140 penetrates, and the fixing bolt 132 for tying the flow preventing plate 130 and the shaft 140 is prevented from flowing. It is fastened at the side of the plate 130.

On the other hand, the upper side of the shaft 140 is integrally formed with an extension 142 having a diameter smaller than the diameter of the shaft 140 body 141. At the boundary line between the extension part 142 and the body 141, a stepped locking step 144 bent at a right angle is formed. And the male screw 143 is formed on the upper end of the extension portion 142 is formed.

Vise unit 150 is composed of a fixed plate 160, a movable plate 170, a compression spring 190 and a tightening lever 180.

The fixing plate 160 has a rectangular plate shape and is inserted into the extension part 142 of the shaft 140 to be seated on the locking jaw 144, and the fixing bolt 162 is fastened on the outer circumferential surface of the fixing plate 160 to fix the fixing plate ( 160 and the shaft 140 is coupled. Two or more guide rods 164 protrude upwards on an upper surface of the fixing plate 160, and compression springs 190 are inserted into each guide rod 16.

The movable plate 170 has a rectangular plate shape like the fixed plate 160, and is specifically designed to have the same length and width as the fixed plate 160. The movable plate 170 is inserted into the extension portion 142 of the shaft 140 and a through hole 172 corresponding thereto is formed so that the guide rod 164 protruding from the fixing plate 160 passes. Therefore, the movable plate 170 is elastically supported at a predetermined interval by the compression spring 190 in the upper portion of the fixed plate 160.

The tightening lever 180 has a rod shape that is screwed to the male screw 143 of the shaft 140, and a female screw (not shown) corresponding to the male screw 143 is formed on the lower surface thereof, and a knurling on the outer circumference of the upper surface thereof. 182 are processed.

Hereinafter, the state of use of the jig 100 for the terminal bending test formed as described above will be briefly described.

First, the jig 10 according to the present invention is mounted on the bed portion 11 of the universal testing machine 10. That is, the bottom fixing plate 110 is settled on the upper surface of the bed 11, and the fixing bolt 112 of the bottom fixing plate 110 is fastened by screwing the screw hole 17 of the bed 11.

Next, the bed 11 is moved or the vise 150 is properly turned so that the lower end of the compression rod 20 mounted on the elevating part 13 coincides with the bite of the vise 150. In order to turn the vise part 150, after loosening the fixing bolt 162 fastened to the outer circumferential surface of the fixing plate 160, it is fastened again to be fastened again.

In this state, the test terminal sample is bitten into the vise part 150. In order to bite the sample, the movable plate 170 should be moved upward to allow the bite of the vise part 150 to be sufficiently spaced apart. That is, when the tightening lever 180 is released, the movable plate 170 is moved upward by the repulsive force of the compression spring 190, and the bite portions are sufficiently spaced apart. In this state, the sample is inserted and the tightening lever 180 is rotated to fix the sample to the vise part 150.

When the mounting of the sample is completed, the universal testing machine 10 is operated to raise and lower the lifting unit 13 and the end of the compression rod 20 presses the sample. At this time, the strength measuring unit 14 and the calculation output unit 15 calculates the pressing strength of the compression rod 20 and outputs it as a graph.

Hereinafter, the bending strength of the terminal is tested in the universal testing machine 10 by using the jig 100 for the terminal bending test according to the present invention.

<Test Example>

- Test Methods

1.The pins of the 9090 connector terminals (0.3mm2, 0.85mm2, 2.0mm2) are bitten by the jig 100 of the universal testing machine, and the terminal break is loaded to 30 ° at the speed of 50mm / min as shown in <Figure 1>. After adding, measure the maximum bending strength of each terminal as shown in <Figure 2>. At this time, five times for each terminal are conducted for the fairness of the test.

2. Test evaluation based on US-CAR2 SPEC

<Figure 1>

<Figure 2>

-Test result data

As for the test results, graphs of three terminal samples are output to the calculation output unit 15 as shown in <Graph 1>, <Graph 2>, and <Graph 3> below.

<Graph 1>

<Graph 1>

<Graph 1>

TABLE 1

As can be seen from the above test result, the minimum bending strength of 0.3mm2 sample is 2.25kgf, so 0.3mm2 terminal should be used within the range of 2.25kgf or less.

It is also preferred that 0.85 mm2 terminals be used within the range of 1.27 kgf or less, and 2.0 mm2 terminals be within the range of 1.29 kgf or less.

1 is a view showing a commonly used terminal,

2 is a view showing a state in which the jig according to the invention mounted on a universal testing machine,

3 is an exploded perspective view showing a jig according to the present invention, and

4 is a combined side view of the jig according to the present invention.

Claims (4)

A bottom fixing plate 110 mounted on the upper surface of the bed portion 11 of the universal testing machine 10; A body 120 formed on an upper surface of the bottom fixing plate 110; A shaft 140 inserted into an upper surface of the body 120 and having a pin 147 fixed thereto; And The fixing plate 160 is inserted into the upper portion of the shaft 140 and seated, the movable plate 170 is elastically supported on the fixing plate 160 while being inserted into the upper portion of the shaft 140, and the shaft 140 Jig for terminal flexural strength test, characterized in that it comprises a vise (150) having a tightening lever (180) for selectively moving up and down the movable plate 170 while being screwed to the top. According to claim 1, On the upper surface of the body 120 is inserted into the lower portion of the shaft 140 is seated on the upper surface of the body 120, One or more fixing bolts 132 are fastened on the outer peripheral surface of the Jig for terminal flexural strength test further comprises a flow preventing plate (130) to prevent shaking of the shaft (140). According to claim 1, wherein two or more guide rods 164 protruding on the upper surface of the fixing plate 16 to penetrate the movable plate 170, the compression spring 190 is formed on the guide rod 164 Jig for terminal flexural strength testing, characterized in that it is inserted. According to claim 1, wherein the upper side of the shaft 140 extends to a smaller diameter than the body 141, the fixing plate 160 is inserted and seated, one or more fixing bolts 162 on the outer peripheral surface of the fixing plate 160 Jig for the terminal bending strength test, characterized in that fastened to fix the fixing plate (160) to the shaft (140).

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