Multi-station test tool

Abstract

The utility model discloses a multi-station test tool, which is characterized in that two copper bars are arranged on a base to be connected with one pole of a voltage withstanding instrument, a plurality of test probes are arranged above the base to be connected with the other pole of the voltage withstanding instrument, and the plurality of test probes are arranged on a probe support along the extension direction of the copper bars. Therefore, a plurality of test stations in one-to-one correspondence with the plurality of test probes can be formed between the two copper bars, a plurality of to-be-tested aluminum heating tubes can be simultaneously placed for detection, the detection efficiency is greatly improved, heating electrodes at two ends of the aluminum heating tubes placed in the test stations are respectively in contact with the two copper bars, and the test efficiency is greatly improved. The test probe is driven by the lifting air cylinder to move downwards to be in contact with the aluminum heating tube shell in the test station, a detection circuit for detecting the insulation and voltage resistance performance and dielectric strength of the aluminum heating tubes is formed, and compared with a traditional detection mode that workers manually detect the aluminum heating tubes one by one, the detection steps are simplified, the detection efficiency is improved, and the detection cost is reduced. And the labor cost of PTC heater production is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of heater technology and relates to the safety testing of heaters, specifically a multi-station testing fixture. Background Technology

[0002] PTC refers to semiconductor materials or components with a large positive temperature coefficient, generally referring to positive temperature coefficient thermistors. A PTC thermistor is a typical temperature-sensitive semiconductor resistor. When the temperature exceeds a certain level, its resistance increases stepwise with the increase of temperature.

[0003] PTC heaters are assembled from multiple aluminum heating tubes with PTC elements and multiple sets of corrugated heat dissipation fins. During the manufacturing process of PTC heaters, the electrical performance of the aluminum heating tubes needs to be tested, including insulation withstand voltage and dielectric strength, to ensure that the product quality meets the usage requirements. Traditional testing methods usually involve workers manually placing each aluminum heating tube on a testing device for testing one by one. This method is inefficient, inconvenient, and not very accurate, which seriously affects the production efficiency of PTC heaters and increases labor costs. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a multi-station testing fixture that can simultaneously place multiple aluminum heating tubes to be tested for inspection, greatly improving the testing efficiency and reducing the labor costs of PTC heater production.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A multi-station testing fixture includes: a base, copper bars, test probes, a lifting cylinder, and a withstand voltage tester. Two copper bars are arranged parallel to each other on the base. Multiple test probes are arrayed along the extension direction of the copper bars on a probe holder above the base, forming multiple test stations corresponding one-to-one between the two copper bars. An aluminum heating tube to be tested is placed on a test station, with its heating electrodes at both ends contacting the two copper bars respectively. The probe holder is connected to the lifting cylinder, which is mounted on the base, to drive the multiple test probes downwards until they contact the outer shells of the multiple aluminum heating tubes in the multiple test stations. One pole of the withstand voltage tester is electrically connected to the two copper bars, and the other pole is electrically connected to the multiple test probes.

[0007] Furthermore, the probe holder includes a first support rod and a second support rod. The first support rod is arranged parallel above two copper bars, and multiple test probes are evenly arrayed on the first support rod. One end of the second support rod is connected to the first support rod, and the other end is connected to a lifting cylinder.

[0008] Furthermore, the length of the first support rod is the same as the length of the copper strip.

[0009] Furthermore, the lifting cylinder is a rotary cylinder, which drives the probe bracket to rotate around the lifting cylinder while moving up / down.

[0010] Furthermore, a valve is provided on one side of the lifting cylinder. The valve is mounted on the base and is connected to the lifting cylinder through an air pipe to control the movement of the lifting cylinder.

[0011] Furthermore, the two ends of the copper strip are fixedly connected to the base by bolts.

[0012] Furthermore, a pad is placed between the two copper strips, which is supported under the aluminum heating tube to be tested, in order to adjust the height of the aluminum heating tube.

[0013] Furthermore, one end of each of the two copper bars is connected in parallel with a wire to one pole of the withstand voltage tester, and multiple test probes are connected in parallel with a wire to the other pole of the withstand voltage tester.

[0014] The beneficial effects of this utility model are as follows: The multi-station testing fixture provided in this application has two copper strips on the base connected to one pole of the withstand voltage tester, and multiple test probes on the top of the base connected to the other pole of the withstand voltage tester. The multiple test probes are arranged on the probe bracket along the extension direction of the copper strips, thereby forming multiple testing stations between the two copper strips, each corresponding to one of the multiple test probes. Multiple aluminum heating tubes to be tested can be placed in the test station at the same time, which greatly improves the testing efficiency. The heating electrodes at both ends of the aluminum heating tube placed in the testing station are in contact with the two copper strips respectively. The test probes are driven by the lifting cylinder to move down to contact the outer shell of the aluminum heating tube in the testing station, forming a testing circuit for testing the insulation withstand voltage performance and dielectric strength of the aluminum heating tube. Compared with the traditional testing method of manually testing each aluminum heating tube, this simplifies the testing steps, improves the testing efficiency, and reduces the labor cost of PTC heater production. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention.

[0016] Figure 2 This is a front view schematic diagram of the present utility model.

[0017] Figure 3 This is a side view of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1-3 As shown, this utility model provides a multi-station testing fixture, including: a base 1, copper bars 2, test probes 3, a lifting cylinder 4, and a withstand voltage tester 5. Two copper bars 2 are provided, arranged parallel to each other on the base 1. Seven test probes 3 are arranged in an array along the extension direction of the copper bars 2 on a probe bracket 6 above the base 1. One pole of the withstand voltage tester 5 is electrically connected to the two copper bars 2, and the other pole is electrically connected to the seven test probes 3. This forms seven testing stations between the two copper bars 2, each corresponding to one of the seven test probes 3, allowing seven aluminum heating tubes 7 to be tested to be placed simultaneously for detection, greatly improving testing efficiency.

[0020] Specifically, one end of each of the two copper bars 2 is connected in parallel via wires to one pole of the withstand voltage tester 5, and multiple test probes 3 are connected in parallel via wires to the other pole of the withstand voltage tester 5. Both ends of the copper bars 2 are fixedly connected to the base 1 by bolts 21. The base 1 has two opposing strip grooves 11. The bolts 21 at both ends of a copper bar 2 pass through the two strip grooves 11 and are connected to the base 1, so that the copper bar 2 can be axially translated along the strip grooves 11 and fixed by tightening the bolts 21. This allows the distance between the two copper bars 2 to be adjusted to accommodate aluminum heating tubes 7 of different specifications.

[0021] Seven aluminum heating tubes 7 to be tested are placed sequentially on seven test stations, with the heating electrodes at both ends of the aluminum heating tubes 7 in contact with two copper strips 2 respectively. A pad 9 is placed between the two copper strips 2, supporting the aluminum heating tubes 7 to adjust their height, allowing the heating electrodes at both ends of the aluminum heating tubes 7 to freely contact the copper strips 2. A probe bracket 6 is connected to a lifting cylinder 4, which is mounted on a base 1. By controlling the lifting cylinder 4, the seven test probes 3 can be moved downwards to contact the outer shells of the seven aluminum heating tubes 7 in the seven test stations, thus forming seven sets of detection circuits from the positive terminal of the withstand voltage tester 5 through the copper strips 2, the electrodes of the aluminum heating tubes 7, the outer shells of the aluminum heating tubes 7, the test probes 3, to the negative terminal of the withstand voltage tester 5. This simultaneously tests the insulation withstand voltage performance and dielectric strength of the seven aluminum heating tubes 7. Compared to the traditional method of manually testing each aluminum heating tube individually, this simplifies the testing steps, improves testing efficiency, and reduces the labor costs of PTC heater production.

[0022] The probe holder 6 includes a first support rod 61 and a second support rod 62. The first support rod 61 is arranged parallel above two copper strips 2, and multiple test probes 3 are evenly arrayed on the first support rod 61. One end of the second support rod 62 is connected to the first support rod 61, and the other end is connected to the lifting cylinder 4. The length of the first support rod 61 is the same as the length of the copper strips 2.

[0023] The lifting cylinder 4 is a corner cylinder, which can drive the probe holder 6 to move up / down while simultaneously rotating the probe holder 6 around the lifting cylinder 4. In actual use, after the aluminum heating tubes 7 to be tested are placed into the corresponding test positions in sequence, when the corner cylinder drives the test probe 3 to move downward, the probe holder 6 rotates around the lifting cylinder 4 simultaneously to rotate the test probe 3 directly above the aluminum heating tube 7. When the test probe 3 moves downward to contact the outer shell of the aluminum heating tube 7, the probe holder 6 rotates to a position parallel to the first support rod 61 and the copper strip 2. After the test is completed, when the corner cylinder drives the test probe 3 to move upward, the probe holder 6 reverses again around the lifting cylinder 4, causing the first support rod 61 of the probe holder 6 to leave the top of the aluminum heating tube 7, thus facilitating the removal of the tested aluminum heating tube 7 from the test position and the placement of a new aluminum heating tube 7 to be tested. A valve 8 is provided on one side of the lifting cylinder 4, which is mounted on the base 1. The valve 8 is connected to the lifting cylinder 4 through an air pipe to control the operation of the lifting cylinder 4.

[0024] In operation, this invention first places seven aluminum heating tubes 7 to be tested sequentially on seven testing stations, so that the heating electrodes at both ends of the aluminum heating tubes 7 are in contact with two copper strips 2 respectively. The lifting cylinder 4, controlled by the air valve 8, drives the seven test probes 3 to move downwards until they are in contact with the outer shells of the seven aluminum heating tubes 7 in the seven testing stations. At the same time, the insulation withstand voltage performance and dielectric strength of the seven aluminum heating tubes 7 are tested. The test data displayed by the withstand voltage meter 5 is used to judge whether the seven aluminum heating tubes 7 are qualified. If they meet the requirements, the seven aluminum heating tubes 7 are qualified. If the test data displayed by the withstand voltage meter 5 exceeds the preset range, it is determined that there are unqualified products among the seven aluminum heating tubes 7. Then, the seven aluminum heating tubes 7 are tested again in sequence to find the unqualified products.

[0025] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A multi-station testing fixture, characterized in that, include: The test setup consists of a base (1), copper bars (2), test probes (3), a lifting cylinder (4), and a withstand voltage tester (5). There are two copper bars (2), which are arranged parallel to each other on the base (1). There are multiple test probes (3), which are arrayed along the extension direction of the copper bars (2) on a probe bracket (6) above the base (1) to form multiple test stations corresponding to the multiple test probes (3) between the two copper bars (2). The aluminum heating tube (7) to be tested is placed on the test station, and the heating electrodes at both ends of the aluminum heating tube (7) are in contact with the two copper bars (2). The probe bracket (6) is connected to the lifting cylinder (4), which is installed on the base (1) to drive the multiple test probes (3) to move downwards to contact the outer shells of the multiple aluminum heating tubes (7) in the multiple test stations. One pole of the withstand voltage tester (5) is electrically connected to the two copper bars (2), and the other pole of the withstand voltage tester (5) is electrically connected to the multiple test probes (3).

2. The test fixture according to claim 1, characterized in that, The probe holder (6) includes a first support rod (61) and a second support rod (62). The first support rod (61) is arranged in parallel above two copper bars (2). Multiple test probes (3) are evenly arrayed on the first support rod (61). One end of the second support rod (62) is connected to the first support rod (61), and the other end is connected to the lifting cylinder (4).

3. The testing fixture according to claim 2, characterized in that, The length of the first support rod (61) is the same as the length of the copper strip (2).

4. The test fixture according to claim 2, characterized in that, The lifting cylinder (4) is a rotary cylinder to drive the probe bracket (6) to rotate around the lifting cylinder (4) while moving up / down.

5. The testing fixture according to claim 4, characterized in that, A valve (8) is provided on one side of the lifting cylinder (4). The valve (8) is installed on the base (1). The valve (8) is connected to the lifting cylinder (4) through an air pipe to control the movement of the lifting cylinder (4).

6. The test fixture according to claim 1, characterized in that, The two ends of the copper strip (2) are fixedly connected to the base (1) by bolts.

7. The test fixture according to claim 1, characterized in that, A pad (9) is placed between the two copper strips (2), and the pad (9) is supported under the aluminum heating tube (7) to be tested in order to adjust the height of the aluminum heating tube (7).

8. The test fixture according to claim 1, characterized in that, Two copper bars (2) are connected to one pole of the withstand voltage tester (5) by wires in parallel at one end, and multiple test probes (3) are connected to the other pole of the withstand voltage tester (5) by wires in parallel.

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