High-frequency test tool for power type resistor

Abstract

The utility model discloses a high-frequency test tool for a power type resistor, which relates to the technical field of power type resistor testing and comprises a circulating guide rail mechanism, a carrying table is mounted at the front end of the circulating guide rail mechanism, a feeding mechanical arm base is mounted at the upper end of the carrying table, and a feeding mechanical arm is mounted at the lower end of the feeding mechanical arm base. A loading conveyor is installed on one side of the carrying table, a qualified product discharging conveyor and a defective product discharging conveyor are installed on the other side of the carrying table, the qualified product discharging conveyor and the defective product discharging conveyor are arranged side by side, and an appearance detection mechanism is installed on one side of the front end of the circulating guide rail mechanism. One side of the rear end of the circulating guide rail mechanism is provided with a resistance value detection mechanism, the rear end of the circulating guide rail mechanism is provided with a withstand voltage test mechanism, and the problem that when an existing tool is used for continuously testing a resistor, only one parameter can be detected, and the efficiency is low is solved.

Description

Technical Field

[0001] This utility model relates to the field of power resistor testing technology, specifically a high-frequency testing fixture for power resistors. Background Technology

[0002] A resistor is a current-limiting component. When a resistor is connected in a circuit, it can limit the amount of current passing through the branch it is connected to. Power resistors, in order to ensure that the parameters meet production requirements, usually need to undergo multiple high-frequency tests to ensure the quality of the finished product.

[0003] Current resistor testing fixtures, such as the one in CN215575239U, include a high-frequency test fixture for a fixed resistor of RF power type, comprising a test platform. A clamping test mechanism is fixedly installed at the center of the top of the test platform. The clamping test mechanism includes two symmetrically arranged pushing members. Each pushing member includes an electric slide rail. A pushing block is slidably connected to the top of the electric slide rail. A test groove is opened on one side of the pushing block. The clamping test mechanism also includes a test pad. A positioning groove is opened on the top of the test pad. A feeding mechanism is fixedly installed on one side of the top of the test platform.

[0004] However, the above-mentioned fixture can only test one parameter when continuously testing resistors, which is inefficient. Therefore, we provide a high-frequency testing fixture for power resistors. Utility Model Content

[0005] The purpose of this invention is to provide a high-frequency testing fixture for power resistors, in order to solve the problem mentioned in the background art that existing fixtures can only test one parameter when continuously testing resistors, resulting in low efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-frequency testing fixture for power resistors, comprising a circulating guide rail mechanism, a platform mounted at the front end of the circulating guide rail mechanism, a loading robotic arm base mounted on the upper end of the platform, a loading conveyor mounted on one side of the platform, and a qualified product unloading conveyor and a defective product unloading conveyor mounted on the other side of the platform, with the qualified product unloading conveyor and the defective product unloading conveyor arranged side by side. An appearance inspection mechanism is mounted on one side of the front end of the circulating guide rail mechanism, a resistance detection mechanism is mounted on one side of the rear end of the circulating guide rail mechanism, a withstand voltage testing mechanism is mounted on the rear end of the circulating guide rail mechanism, and a pulse testing mechanism is mounted on the other side of the rear end of the circulating guide rail mechanism.

[0007] Preferably, the circulating guide rail mechanism includes a guide rail platform, with a driving wheel installed at one end of the guide rail platform and a driven wheel installed at the other end of the guide rail platform. A stepper motor is installed on the bottom surface of the driving wheel, and the output end of the stepper motor is connected to the driving wheel. The driving wheel is connected to the driven wheel via a transmission belt. An annular guide rail is provided on the outer side of the transmission belt. Multiple slides are slidably connected on the annular guide rail, and the sides of the slides are connected to the transmission belt. A resistor detection seat is installed on the upper end of the slide, and a placement groove is provided inside the resistor detection seat.

[0008] Preferably, a damping layer is provided on the inner wall of the placement groove.

[0009] Preferably, the resistance detection mechanism, withstand voltage testing mechanism, and pulse testing mechanism all include a connecting seat. A support column is installed at the upper end of the connecting seat, and a machine head is installed at the upper end of the support column. A hydraulic cylinder is installed at the upper end of the machine head. The output end of the hydraulic cylinder passes through and extends to the lower end of the machine head, and a test connector is installed thereon. Pin holes are provided on both sides of the bottom surface of the test connector, and spring pins are provided inside the pin holes.

[0010] Preferably, the bottom surface of the test connector is provided with an insulating pad, and the insulating pad is bonded to the test connector.

[0011] Preferably, the test connector of the resistance detection mechanism is connected to an external digital multimeter, the test connector of the withstand voltage testing mechanism is connected to an external withstand voltage tester, and the test connector of the pulse testing mechanism is connected to an external pulse generator.

[0012] Preferably, the upper end of the test connector is connected to the output end of the hydraulic cylinder via a connector and screws, and the four corners of the resistor detection seat are connected to the slide table via screws.

[0013] Preferably, probe brackets are installed on the outer walls of the support columns of both the pressure resistance testing mechanism and the pulse testing mechanism, and temperature detection probes are installed on the probe brackets.

[0014] Preferably, the appearance inspection mechanism includes a support frame and a camera module, with the camera module mounted at one end of the support frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) During testing, the power resistors on the production line are transported to the platform at the front end of the circulating guide mechanism by the feeding conveyor. The feeding robot arm on the platform picks up the resistors and places them on the slide of the circulating guide mechanism, so that they are inserted into the placement groove of the resistor detection seat on the surface of the slide. Then the circulating guide mechanism moves forward step by step, and the appearance inspection mechanism, resistance detection mechanism, withstand voltage test mechanism and pulse test mechanism are used to test the resistors in sequence. Each test interval of the fixture is 1 minute. In each step, the feeding robot arm will pick up the new resistor and place it into the nearest resistor detection seat, thereby realizing continuous multi-parameter testing. This solves the problem that the existing fixture can only test one parameter when continuously testing the resistor, which is inefficient.

[0017] (2) Due to the uncertainty of the transportation process, before the test, the appearance inspection agency first collects images of the resistor. Based on the image processing module, the damage of the resistor skin and the bending of the pins are determined. If the conditions are met, the subsequent test is carried out. The resistance value testing agency, the withstand voltage testing agency and the pulse testing agency can respectively test the cold resistance value, withstand voltage strength and surge resistance of the resistor. If the resistor is abnormal in any of the appearance, resistance value, withstand voltage strength and surge resistance tests, it is judged as a defective product and the subsequent test is skipped. When the cycle reaches the starting position, the loading robot arm places it on the defective product unloading conveyor. While completing the test, the defective product is sorted. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the circulating guide rail mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the resistance detection mechanism of this utility model;

[0021] Figure 4 This is a partially enlarged schematic diagram of point A in this utility model;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the test connector of this utility model;

[0023] In the diagram: 1. Circulating guide rail mechanism; 101. Guide rail platform; 102. Driving wheel; 103. Driven wheel; 104. Transmission belt; 105. Circular guide rail; 106. Slide table; 107. Resistor testing base; 108. Placement slot; 2. Carrier platform; 3. Loading robot arm base; 4. Loading conveyor; 5. Qualified product unloading conveyor; 6. Defective product unloading conveyor; 7. Appearance inspection mechanism; 701. Support frame; 702. Camera module; 8. Resistance value detection mechanism; 9. Withstand voltage testing mechanism; 10. Pulse testing mechanism; 11. Connecting seat; 12. Support column; 13. Machine head; 14. Hydraulic cylinder; 15. Test connector; 16. Connector; 17. Probe bracket; 18. Temperature detection probe; 19. Insulating pad; 20. Pin socket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-5 This utility model provides an embodiment of a high-frequency testing fixture for power resistors, comprising a circulating guide rail mechanism 1, a platform 2 mounted at the front end of the circulating guide rail mechanism 1, a loading robotic arm base 3 mounted on the upper end of the platform 2, a loading conveyor 4 mounted on one side of the platform 2, and a qualified product unloading conveyor 5 and a defective product unloading conveyor 6 mounted on the other side of the platform 2, with the qualified product unloading conveyor 5 and the defective product unloading conveyor 6 arranged side by side. An appearance inspection mechanism 7 is mounted on one side of the front end of the circulating guide rail mechanism 1, a resistance detection mechanism 8 is mounted on one side of the rear end of the circulating guide rail mechanism 1, a withstand voltage testing mechanism 9 is mounted on the rear end of the circulating guide rail mechanism 1, and a pulse testing mechanism 10 is mounted on the other side of the rear end of the circulating guide rail mechanism 1. The resistance detection mechanism 8, the withstand voltage testing mechanism 9, and the pulse testing mechanism 10 all include a connecting seat 11, with the upper end of the connecting seat 11 equipped with... There is a support column 12, and a machine head 13 is installed at the upper end of the support column 12. A hydraulic cylinder 14 is installed at the upper end of the machine head 13. The output end of the hydraulic cylinder 14 passes through and extends to the lower end of the machine head 13, and a test connector 15 is installed thereon. Both sides of the bottom surface of the test connector 15 are provided with pin sockets 20. A spring pin is provided inside the pin socket 20. The test connector 15 of the resistance detection mechanism 8 is connected to a digital multimeter. The test connector 15 of the withstand voltage test mechanism 9 is connected to a withstand voltage tester. The test connector 15 of the pulse test mechanism 10 is connected to a pulse generator. The outer wall of the support column 12 of the withstand voltage test mechanism 9 and the pulse test mechanism 10 are both equipped with probe brackets 17. A temperature detection probe 18 is installed on the probe bracket 17. The appearance inspection mechanism 7 includes a support frame 701 and a camera module 702, and the camera module 702 is installed at one end of the support frame 701.

[0026] During testing, the tooling uses a feeding conveyor 4 to transport power resistors from the production line to a platform 2 at the front end of a circulating guide mechanism 1. The feeding robotic arm on the platform 2 picks up the resistors and places them on a slide 106 of the circulating guide mechanism 1, so that they are inserted into the placement groove 108 of the resistor detection seat 107 on the surface of the slide 106. Then, the circulating guide mechanism 1 moves forward step by step, and the appearance inspection mechanism 7, resistance detection mechanism 8, withstand voltage test mechanism 9, and pulse test mechanism 10 test the resistors in sequence. Each test interval of the tooling is 1 minute. In each step, the feeding robotic arm will pick up a new resistor and place it into the nearest resistor detection seat 107, thereby achieving continuous testing.

[0027] Due to the uncertainty of the transportation process, before testing, the appearance inspection mechanism 7 first collects images of the resistor. Based on the image processing module, the damage to the resistor's outer casing and the bending of its leads are determined. If the conditions are met, subsequent tests are carried out. The resistance value testing mechanism 8, the withstand voltage testing mechanism 9, and the pulse testing mechanism 10 can respectively test the cold resistance value, withstand voltage strength, and surge resistance of the resistor. If the resistor is abnormal in any of the appearance, resistance value, withstand voltage strength, or surge resistance tests, it is judged as a defective product and is skipped in subsequent tests. When the cycle reaches the starting position, the loading robot arm places it on the defective product unloading conveyor 6.

[0028] During the withstand voltage test mechanism 9 and the pulse test mechanism 10, the temperature detection probe 18 can monitor the temperature of the resistor in real time. If an abnormal temperature occurs during the test, the feedback terminal will be sent to the controller to stop the current test and determine that it is a defective product, and it will be recycled in the same way as above.

[0029] Please see Figure 2 The circulating guide rail mechanism 1 includes a guide rail platform 101. A drive wheel 102 is installed at one end of the guide rail platform 101, and a driven wheel 103 is installed at the other end of the guide rail platform 101. A stepper motor is installed on the bottom surface of the drive wheel 102, and the output end of the stepper motor is connected to the drive wheel 102. The drive wheel 102 is connected to the driven wheel 103 via a transmission belt 104. An annular guide rail 105 is provided on the outer side of the transmission belt 104. Multiple slides 106 are slidably connected on the annular guide rail 105, and the sides of the slides 106 are connected to the transmission belt 104. A resistor detection seat 107 is installed on the upper end of the slides 106. A placement groove 108 is provided inside the resistor detection seat 107. When the circulating guide rail mechanism 1 is running, the output end of the stepper motor runs, driving the drive wheel 102 to rotate. The drive wheel 102 is driven by the transmission belt 104 and the driven wheel 103, thereby causing the slides 106 on the transmission belt 104 to move cyclically along the annular guide rail 105.

[0030] Please see Figure 3A damping layer is provided on the inner wall of the placement groove 108. The damping layer is made of rubber material, which has both insulation effect and can ensure the stability of the resistor placed in the placement groove 108.

[0031] Please see Figure 5 An insulating pad 19 is provided on the bottom surface of the test connector 15, and the insulating pad 19 is bonded to the test connector 15.

[0032] Furthermore, the upper end of the test connector 15 is connected to the output end of the hydraulic cylinder 14 via the connector 16 and screws, and the four corners of the resistor detection base 107 are connected to the slide table 106 via screws. Both the test connector 15 and the resistor detection base 107 are detachable structures and can be replaced according to the actual specifications of the resistor, thus improving the testing flexibility.

[0033] Working principle: The power resistors on the production line are transported by the feeding conveyor 4 to the platform 2 at the front end of the circulating guide mechanism 1. The feeding robotic arm on the platform 2 picks up the resistors and places them on the slide 106 of the circulating guide mechanism 1, so that they are engaged in the placement groove 108 of the resistor detection seat 107 on the surface of the slide 106. After completion, the circulating guide mechanism 1 runs, starting from the starting position, and driven by the transmission belt 104, it moves the resistor detection seat 107 step by step along the annular guide 105, so that the resistor detection seat 107 moves to below the appearance inspection mechanism 7, and is inspected by the appearance inspection mechanism 7. The testing mechanism 7 inspects the appearance of the resistor. After the appearance inspection is completed, the circulating guide rail mechanism 1 continues to advance, moving the resistor testing seat 107 to the resistance testing mechanism 8. The hydraulic cylinder 14 on the resistance testing mechanism 8 operates, causing the test connector 15 to move downward, so that the resistor leads are inserted into the lead sockets 20 of the test connector 15. A digital multimeter is connected to the test connector 15 to directly measure the cold resistance value. The testing time is 1 minute. After the cold resistance value test is completed, the circulating guide rail mechanism 1 continues to advance, moving the resistor testing seat 107 to the withstand voltage testing mechanism 9. The hydraulic cylinder 14 on the pressure testing mechanism 9 operates, causing the test connector 15 to move downwards, so that the resistor pins are inserted into the pin sockets 20 of the test connector 15. A withstand voltage tester is connected to the test connector 15, and the withstand voltage tester applies 1.5 times the rated voltage to the resistor to test for flashover. The test time is 1 minute. During the test, the temperature detection probe 18 monitors the resistor temperature in real time. After the withstand voltage test is completed, the circulating guide rail mechanism 1 continues to advance, moving the resistor detection seat 107 to the pulse testing mechanism 10. The hydraulic cylinder 14 on the pulse testing mechanism 10 then operates... The test connector 15 is moved downwards, so that the resistor pins are inserted into the pin sockets 20 of the test connector 15. The test connector 15 is connected to an external pulse generator, which applies a short-term high current to the resistor to test whether a sudden change in resistance occurs. The test time is 1 minute. During the process, the temperature detection probe 18 monitors the resistor temperature in real time. After all tests are completed, the circulating guide rail mechanism 1 drives the resistor test seat 107 back to the starting position. The loading robot arm at the starting point places the resistor clamp on the qualified product unloading conveyor 5 or the defective product unloading conveyor 6 according to the test structure.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-frequency testing fixture for power resistors, comprising a circulating guide rail mechanism (1), characterized in that: The front end of the circulating guide rail mechanism (1) is equipped with a platform (2), the upper end of the platform (2) is equipped with a loading robot arm base (3), a loading conveyor (4) is installed on one side of the platform (2), a qualified product unloading conveyor (5) and a defective product unloading conveyor (6) are installed on the other side of the platform (2), and the qualified product unloading conveyor (5) and the defective product unloading conveyor (6) are arranged side by side. An appearance inspection mechanism (7) is installed on one side of the front end of the circulating guide rail mechanism (1), a resistance detection mechanism (8) is installed on one side of the rear end of the circulating guide rail mechanism (1), a withstand voltage test mechanism (9) is installed at the rear end of the circulating guide rail mechanism (1), and a pulse test mechanism (10) is installed on the other side of the rear end of the circulating guide rail mechanism (1).

2. The high-frequency testing fixture for power resistors according to claim 1, characterized in that: The circulating guide rail mechanism (1) includes a guide rail platform (101), a drive wheel (102) is installed at one end of the guide rail platform (101), and a driven wheel (103) is installed at the other end of the guide rail platform (101). A stepper motor is installed on the bottom surface of the drive wheel (102), and the output end of the stepper motor is connected to the drive wheel (102) for transmission. The drive wheel (102) is connected to the driven wheel (103) for transmission through a transmission belt (104). An annular guide rail (105) is provided on the outer side of the transmission belt (104). Multiple slides (106) are slidably connected on the annular guide rail (105), and the side of the slides (106) is connected to the transmission belt (104). A resistor detection seat (107) is installed at the upper end of the slides (106), and a placement groove (108) is provided inside the resistor detection seat (107).

3. The high-frequency testing fixture for power resistors according to claim 2, characterized in that: A damping layer is provided on the inner wall of the placement groove (108).

4. The high-frequency testing fixture for power resistors according to claim 3, characterized in that: The resistance detection mechanism (8), withstand voltage test mechanism (9) and pulse test mechanism (10) all include a connecting seat (11). A support column (12) is installed on the upper end of the connecting seat (11). A machine head (13) is installed on the upper end of the support column (12). A hydraulic cylinder (14) is installed on the upper end of the machine head (13). The output end of the hydraulic cylinder (14) extends through and to the lower end of the machine head (13) and is equipped with a test connector (15). Both sides of the bottom surface of the test connector (15) are provided with pin holes (20). A spring pin is provided inside the pin hole (20).

5. The high-frequency testing fixture for power resistors according to claim 4, characterized in that: An insulating pad (19) is provided on the bottom surface of the test connector (15), and the insulating pad (19) is bonded to the test connector (15).

6. The high-frequency testing fixture for power resistors according to claim 5, characterized in that: The resistance detection mechanism (8) has a test connector (15) connected to a digital multimeter, the withstand voltage test mechanism (9) has a test connector (15) connected to a withstand voltage tester, and the pulse test mechanism (10) has a test connector (15) connected to a pulse generator.

7. The high-frequency testing fixture for power resistors according to claim 6, characterized in that: The upper end of the test connector (15) is connected to the output end of the hydraulic cylinder (14) via a connector (16) and screws, and the four corners of the resistor detection base (107) are connected to the slide table (106) via screws.

8. The high-frequency testing fixture for power resistors according to claim 7, characterized in that: The outer wall of the support column (12) of the pressure resistance test mechanism (9) and the pulse test mechanism (10) is equipped with a probe bracket (17), and a temperature detection probe (18) is installed on the probe bracket (17).

9. The high-frequency testing fixture for power resistors according to claim 8, characterized in that: The appearance inspection mechanism (7) includes a support frame (701) and a camera module (702), and the camera module (702) is installed at one end of the support frame (701).

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