Welding tension testing device for disengagement elastic piece
A detachable spring sheet welding tensile testing device with a base plate and dynamometer system addresses the lack of standardization in manual testing, ensuring precise and reliable measurement of varistor pin shrapnel strength.
Patent Information
- Application Number
- CN202420145836.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-22
AI Technical Summary
Current manual tensile testing of varistor pin shrapnel using handheld gauges lacks standardization, leading to deviations in test results due to variations in angle and direction, and the low-melting-point solder used in varistors tends to age and disconnect prematurely.
A detachable spring sheet welding tensile testing device with a base plate, linear guide rails, sliding blocks, and a dynamometer system that allows precise control and standardized testing through indexing pins and rolling bearings, ensuring consistent placement and accurate measurement of pulling force.
The device achieves standardized and accurate tensile testing by enabling precise control over test points and reducing the risk of premature disconnection of low-melting-point solder, enhancing the reliability of varistor performance.
Smart Images
Figure CN222144825U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tensile testing of varistor products, in particular to a tensile testing device for welding a detached spring sheet. Background Art
[0002] Varistors have long been used in lightning protection products, but the accidents of burning and explosion in the application system caused by the failure of the varistor due to short circuit have attracted the attention of customers. Whether from the circuit principle or the mechanical structure, the failure protection methods of the varistor have their own advantages and disadvantages. Designers need to make reasonable choices according to the application system environment. There are currently five overheat protection technologies for varistors, among which the technology of using springs to pull low-melting-point solder is the technology used by the voltage-limiting surge protector of most lightning arrester manufacturers.
[0003] The technology of using a spring to pull the low-melting-point solder is to add a low-melting-point solder welding point to the pin shrapnel of the varistor, and then use a spring to pull the shrapnel welding point. When the leakage current of the varistor is too large and the temperature rises to a certain level, the solder at the welding point will melt, and the welding point will quickly separate under the tension of the spring, thereby cutting off the varistor from the circuit, and at the same time, the alarm contact will be linked to send out an alarm signal. Because low-melting-point metals will flow and crack at the stress point, the solder at the low-melting-point solder contact under the tension of the spring will also flow and crack. Therefore, the biggest problem of this device is that the solder will age, causing the device to disconnect for no reason. In order to avoid this situation as much as possible, the pin shrapnel of the varistor needs to be subjected to a tensile test after welding to ensure that the low-melting-point solder welding point of the pin shrapnel does not fall off under the required stress.
[0004] Since the space around the varistor pin spring for tensile testing is relatively narrow, many manufacturers still use manual handheld tensile gauges for tensile testing. This testing process is not standardized and lacks standardization. There will be certain differences in the angle and direction of each pull, resulting in certain deviations in the results. Utility Model Content
[0005] The utility model aims to provide a detachable spring sheet welding tensile testing device to solve the problems raised in the above-mentioned background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detached spring sheet welding tensile test device, comprising a base plate, a front and rear linear guide rail is fixedly installed on the top of the base plate, a sliding block is slidably installed on the front and rear linear guide rails, a fixed plate is installed on the sliding block, and a tensile gauge is fixedly installed on the fixed plate, the front end of the tensile gauge is connected to a threaded sleeve, and a small hook is installed on the threaded sleeve;
[0007] A limit block and a transverse linear guide are installed on the top of the base plate, a carrier plate is slidably installed on the transverse linear guide, a transverse pressure elbow clamp is installed on the groove of the carrier plate, and the transverse pressure elbow clamp is connected to a push block through a screw, and a vertical plate installed on the base plate is provided on one side of the carrier plate, and an indexing pin is fixedly installed on the vertical plate;
[0008] A horizontal push toggle clamp is installed on the top of the base plate, and a connecting block is fixedly installed on the horizontal push toggle clamp, and the connecting block is fixed on the sliding block;
[0009] Ball bearings are installed on both sides of the push block, and a product fixing block is arranged on the top of the ball bearing, a linear bearing is embedded in the product fixing block, an elbow clamp block is fixedly installed on the product fixing block, a vertical elbow clamp is installed on the elbow clamp block, a product to be tested is placed in the placement groove of the product fixing block, and a handle is installed on the product fixing block.
[0010] Preferably, a plurality of feet are installed in an array at the bottom of the substrate.
[0011] Preferably, a slide block is slidably installed on the front and rear linear guide rails, and the slide block is fixedly connected to the slide block.
[0012] Preferably, a threaded head is installed at the front end of the dynamometer, and the threaded sleeve is threadedly sleeved on the threaded head.
[0013] Preferably, the small hook is a stepped shaft structure, a small hook is designed at the front end of the small hook, and one side of the thick shaft of the small hook is inserted into the threaded sleeve.
[0014] Preferably, a position hole is opened on the side of the carrier plate, and the indexing pin is inserted into the position hole.
[0015] Preferably, a cam groove is provided on the product fixing block, and the cam groove is matched with the ball bearing.
[0016] Preferably, equal-height bolts are installed on the carrier plate.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The design of switching the test points away from the springs is achieved by means of indexing pins and array pin holes, thus realizing precise switching of the test points.
[0019] By using rolling bearings and cam grooves, the small hook hooks the product to release the spring, achieving stable contact between the tension hook and the release spring;
[0020] The dynamometer is driven by pushing the toggle clamp horizontally, and the design of the dynamometer is labor-saving to achieve more accurate controllability.
[0021] The utility model improves the consistency of the placement position of the test product through the position slot design; through the overall reasonable design and layout of the dynamometer and product position, the test process is standardized, normalized and convenient, and the accuracy of the test result is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is the overall side view of the utility model;
[0023] Figure 2 This is an overall oblique view of the utility model;
[0024] Figure 3 It is a partial front sectional view of the utility model;
[0025] Figure 4 It is a partial sectional view of the side of the utility model;
[0026] Figure 5 This is a cross-sectional view of the product part of the dynamometer hook of the utility model.
[0027] In the figure: 1. Base plate, 2. Foot pads, 3. Front and rear linear guides, 4. Sliding block, 5. Fixed plate, 6. Tension gauge, 7. Threaded sleeve, 8. Small hook, 9. Limit block, 10. Horizontal linear guide, 11. Carrier plate, 12. Horizontal pressure elbow clamp, 13. Push block, 14. Vertical plate, 15. Indexing pin, 16. Connecting block, 17. Flat push elbow clamp, 18. Ball bearing, 19. Product fixing block, 20. Elbow clamp block, 21. Vertical elbow clamp, 22. Equal height bolts, 23. Linear bearing, 24. Handle, 25. Product to be tested. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] See also Figure 1-5 The utility model provides a technical solution: a detached spring sheet welding tensile test device, comprising a base plate 1, a front and rear linear guide rail 3 is fixedly installed on the top of the base plate 1, a sliding block 4 is slidably installed on the front and rear linear guide rail 3, a fixed plate 5 is installed on the sliding block 4, and a tensile gauge 6 is fixedly installed on the fixed plate 5, a threaded sleeve 7 is connected to the front end of the tensile gauge 6, and a small hook 8 is installed on the threaded sleeve 7;
[0030] A limit block 9 and a transverse linear guide 10 are installed on the top of the base plate 1, a carrier plate 11 is slidably installed on the transverse linear guide 10, a transverse pressing toggle clamp 12 is installed on the groove of the carrier plate 11, and the transverse pressing toggle clamp 12 is connected to a push block 13 by screws, and a vertical plate 14 installed on the base plate 1 is provided on one side of the carrier plate 11, and an indexing pin 15 is fixedly installed on the vertical plate 14;
[0031] A horizontal push toggle clamp 17 is installed on the top of the base plate 1, and a connecting block 16 is fixedly installed on the horizontal push toggle clamp 17, and the connecting block 16 is fixed on the sliding block 4;
[0032] Ball bearings 18 are installed on both sides of the push block 13, and a product fixing block 19 is arranged on the top of the ball bearing 18, a linear bearing 23 is embedded in the product fixing block 19, an elbow clamp block 20 is fixedly installed on the product fixing block 19, a vertical elbow clamp 21 is installed on the elbow clamp block 20, a product 25 to be tested is placed in the placement groove of the product fixing block 19, a metal detachable spring is arranged on the product fixing block 19, and a handle 24 is installed on the product fixing block 19. When measuring the pulling force, one hand can hold the handle and the other hand can hold the push rod of the flat push elbow clamp for better exertion.
[0033] In the present invention, a plurality of feet 2 are installed in an array at the bottom of the base plate 1 .
[0034] In the utility model, a slide block is slidably installed on the front and rear linear guide rails 3, and the slide block is fixedly connected to the slide block 4.
[0035] In the utility model, a threaded head is installed at the front end of the dynamometer 6, and the threaded sleeve 7 is threadedly sleeved on the threaded head.
[0036] In the utility model, the small hook 8 is a stepped shaft structure, a small hook is designed at the front end of the small hook 8, and a thick shaft side of the small hook 8 is inserted into the threaded sleeve 7.
[0037] In the present invention, a position hole is opened on the side of the carrier plate 11, and the indexing pin 15 is inserted into the position hole.
[0038] In the utility model, a cam groove is provided on the product fixing block 19 , and the cam groove is matched with the ball bearing 18 .
[0039] In the utility model, equal height bolts 22 are installed on the carrier plate 11 .
[0040] The working principle of the utility model is as follows: the product 25 to be tested is placed in the placement slot 19, and the vertical toggle clamp 21 is pushed to press the product; the push rod of the horizontal toggle clamp 17 is pushed to drive the dynamometer 6 to move forward until the limit block 9 is in place and stops; at this time, the small hook 8 stops at the test point of the detached spring piece of the product 25 to be tested; the horizontal toggle clamp 12 is pushed, and the product fixing block 19 drives the product 25 to be tested to be lifted, so that the small hook 8 can hook the detached spring piece, such as Figure 5pull the push rod of the elbow clamp 17 backward, and observe the tension meter 6 at the same time, and stop when the specified force value is reached, indicating that the welding force of the detached shrapnel of the tested product 25 meets the requirements, and the risk of aging and fracture is low.
[0041] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the utility model have been shown and described, it is understandable to those of ordinary skill in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.
Claims
1. A detachable spring welding tensile test device, characterized in that: The invention comprises a base plate (1), a front and rear linear guide rail (3) is fixedly mounted on the top of the base plate (1), a sliding block (4) is slidably mounted on the front and rear linear guide rail (3), a fixed plate (5) is mounted on the sliding block (4), a tensile gauge (6) is fixedly mounted on the fixed plate (5), a threaded sleeve (7) is connected to the front end of the tensile gauge (6), and a small hook (8) is mounted on the threaded sleeve (7); A limit block (9) and a transverse linear guide rail (10) are installed on the top of the base plate (1), a carrier plate (11) is slidably installed on the transverse linear guide rail (10), a transverse pressure elbow clamp (12) is installed on the groove of the carrier plate (11), and the transverse pressure elbow clamp (12) is connected to a push block (13) by screws, and a vertical plate (14) installed on the base plate (1) is provided on one side of the carrier plate (11), and an indexing pin (15) is fixedly installed on the vertical plate (14); A horizontal push toggle clamp (17) is installed on the top of the base plate (1), and a connecting block (16) is fixedly installed on the horizontal push toggle clamp (17), and the connecting block (16) is fixed on the sliding block (4); Ball bearings (18) are installed on both sides of the push block (13), and a product fixing block (19) is arranged on the top of the ball bearing (18), a linear bearing (23) is embedded in the product fixing block (19), an elbow clamp block (20) is fixedly installed on the product fixing block (19), a vertical elbow clamp (21) is installed on the elbow clamp block (20), a product to be tested (25) is placed in the placement groove of the product fixing block (19), and a handle (24) is installed on the product fixing block (19).
2. A detached spring welding tensile testing device according to claim 1, characterized in that: A plurality of feet (2) are installed in an array at the bottom of the substrate (1).
3. A detached spring welding tensile testing device according to claim 1, characterized in that: A sliding block is slidably mounted on the front and rear linear guide rails (3), and the sliding block is fixedly connected to the sliding block (4).
4. The device for testing the welding tensile force of a detached spring piece according to claim 1, characterized in that: The front end of the tension gauge (6) is provided with a threaded head, and the threaded sleeve (7) is threadedly sleeved on the threaded head.
5. The device for testing the welding tensile force of a detached spring piece according to claim 1, characterized in that: The small hook (8) is a stepped shaft structure, a small hook is designed at the front end of the small hook (8), and one side of the thick shaft of the small hook (8) is inserted into the threaded sleeve (7).
6. The device for testing the welding tensile force of a detached spring piece according to claim 1, characterized in that: A position hole is provided on the side of the carrier plate (11), and the indexing pin (15) is inserted into the position hole.
7. The device for testing the welding tensile force of a detached spring piece according to claim 1, characterized in that: The product fixing block (19) is provided with a cam groove, and the cam groove is matched with the ball bearing (18).
8. The device for testing the welding tensile force of a detached spring piece according to claim 1, characterized in that: The carrier plate (11) is provided with equal-height bolts (22).