Withstand voltage test fixture
By designing pressure-resistant testing fixtures, using hydraulic press host and unique fixture structure, the problems of low detection accuracy and complex operation in the existing technology are solved, and high-precision, diversity and low-cost detection effects are achieved.
Patent Information
- Application Number
- CN202421650417.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing pressure-resistant detection devices have problems such as large system error, cumbersome operation and expensive equipment. In particular, the accuracy of hydraulic push rods is affected by distance changes, the accuracy of servo motor push rods is poor, and there are many types of detection of universal testing machines that require complex operations.
A pressure-resistant test fixture is designed, including a hydraulic machine main unit, hydraulic head, hydraulic push rod and testing device. It adopts a unique upper and lower fixture structure to achieve accurate inspection through hydraulic push rod and transparent door. The fixture can be replaced to meet different detection needs and simplify the operation process.
It improves detection accuracy, simplifies operation steps, reduces system errors, reduces equipment costs, and enhances the diversity of detection types.
Smart Images
Figure CN223217259U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of testing fixtures, in particular to a withstand voltage testing fixture. Background Art
[0002] A jig is a large category of tools used in carpentry, ironwork, fittery, machinery, electronic control, and other handicrafts. It is mainly used as a tool to assist in controlling position or movement. Jigs can be divided into three categories: process assembly jigs, project test jigs, and circuit board test jigs. Many jigs are created due to business needs, as many types of jigs are customized, some of which are designed to improve productivity, repeat specific actions, or make work more precise. Because the design of jigs is basically based on logic, similar jigs may be produced separately because they are used at different times and places. The advantage of using jigs is that if the product is the same, even if the worker does not have very sophisticated technology, he can quickly use jigs to produce a large number of good products with few defects and low variability.
[0003] In product production, in order to control product quality, adjustment of product production is an indispensable link. Before adjustment, it is necessary to first understand the quality of the products produced. For this purpose, a tool for mechanical property testing of self-produced products is needed.
[0004] Compressive strength is a very important physical performance indicator. Some compressive testing devices usually do not have a means to adjust the distance of the pressure detection point. Changing the distance of the pressure detection point will change the extension and retraction process of the push rod, which will greatly reduce the accuracy of the hydraulic push rod. The accuracy of the servo motor push rod is not affected by the distance change, but the servo motor push rod itself has poor detection accuracy. To achieve higher detection accuracy, hydraulic pressure is usually recommended for mechanical strength testing of the test object. To solve the systematic error caused by the distance change, some technicians add shims to the push rod to change the distance of the pressure detection point. However, the shims have weight, and the influence of gravity introduces new systematic errors.
[0005] Universal testing machines are commonly used to test a variety of mechanical properties and strengths. Their advantage is that they can test a wide range of mechanical properties on a variety of samples. However, their disadvantage is that they are complex to operate due to the wide variety of test types and the large number of samples they can test. These machines require complex fixture replacements, adjustments in multiple test modes, and multiple operations such as counterweighting, oil return, and distance adjustment. Furthermore, they are expensive. Utility Model Content
[0006] In view of the deficiencies in the prior art, the present invention provides a withstand voltage test fixture to solve the problems of detection system error, cumbersome use, etc. raised in the above background technology.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure resistance test fixture, including a hydraulic press main unit and a hydraulic head, a hydraulic push rod and a test device are installed on the hydraulic head, one end of the hydraulic push rod is installed inside the hydraulic head, and the other end extends to the inside through the bottom of the test device, the bottom of the test device is welded to the hydraulic head, and a transparent door is installed on the test device.
[0008] Preferably, the testing device includes a base, a connecting column, a top plate and an upper clamp joint. The base is welded to the hydraulic head. A through hole corresponding to the hydraulic push rod is opened on the base. The hydraulic push rod extends through the through hole to the top of the base. Two groups of connecting columns are welded on both sides of the through hole of the base. A top plate is welded on the connecting column. An upper clamp joint is welded at the corresponding through hole below the top plate.
[0009] Preferably, a mounting hole is provided on the hydraulic push rod, a lower clamp is installed on the hydraulic push rod, the lower clamp is plugged into the mounting hole, an anti-slip groove is provided on the side of the lower clamp, and a mesh marking line is provided on the top surface of the lower clamp.
[0010] Preferably, a splitting fixture can also be installed on the hydraulic push rod, and the top surface of the splitting fixture is provided with a semicircular protrusion suitable for splitting strength testing.
[0011] Preferably, an interface is provided on the upper clamp joint, a block groove is provided at the bottom end of the interface, and an upper clamp is installed on the upper clamp joint.
[0012] Preferably, the upper clamp includes a connecting rod, a stop block and an upper clamp block, an upper clamp block is welded to one end of the connecting rod, and a stop block is provided at the other end of the connecting rod, the connecting rod and the stop block are inserted into the interface, and the protrusion on the stop block is connected with the stop block groove by snap-fitting.
[0013] Compared with the prior art, the present invention provides a pressure test fixture with the following beneficial effects:
[0014] 1. This withstand voltage test fixture is equipped with unique upper and lower fixtures, which can greatly improve the detection accuracy, and it has a variety of test types and is easy to use.
[0015] 2. The upper fixture is equipped with clamps of different thicknesses. The distance between the upper and lower fixtures can be adjusted by replacing different upper fixtures without increasing the gravity on the hydraulic push rod. This can greatly improve the detection accuracy and eliminate the need for counterweight, oil return and other operating steps. The use process is simple and convenient.
[0016] 3. A replaceable lower fixture is provided. The normal lower fixture can be used to test the compressive strength of the sample, and the splitting fixture can also be used to test the splitting strength of the sample. Various test types are available.
[0017] 4. The device is only equipped with two types of clamps: compression and splitting. The hydraulic press operation mode is also only linear oil boosting mode. There is no need to switch modes during use, and there is no need to perform complicated clamp replacement. The use process is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the base and top plate of the utility model;
[0020] Figure 3 This is a schematic diagram of the hydraulic head and upper components of the utility model;
[0021] Figure 4 This is a schematic diagram of the hydraulic head of the utility model;
[0022] Figure 5 This is a schematic diagram of the lower clamp of the utility model;
[0023] Figure 6 This is a schematic diagram of the splitting lower clamp of the utility model;
[0024] Figure 7 This is a schematic diagram of the upper fixture joint of the utility model;
[0025] Figure 8 This is a schematic diagram of the upper clamp of the present utility model.
[0026] In the figure: 1. Hydraulic press main unit; 2. Hydraulic head; 3. Hydraulic push rod; 4. Base; 5. Connecting column; 6. Top plate; 7. Transparent door; 8. Upper clamp joint; 9. Upper clamp; 10. Lower clamp; 11. Mounting hole; 12. Anti-slip groove; 13. Mesh marking; 14. Splitting clamp; 15. Interface; 16. Block groove; 17. Connecting rod; 18. Block; 19. Upper clamp. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0028] See also Figure 1-8 , the utility model provides a technical solution:
[0029] A pressure test fixture includes a hydraulic press main unit 1 and a hydraulic head 2. A hydraulic push rod 3 and a test device are mounted on the hydraulic head 2. One end of the hydraulic push rod 3 is mounted inside the hydraulic head 2, and the other end extends through the bottom of the test device into the interior. The bottom of the test device is welded to the hydraulic head 2. A transparent door 7 is mounted on the test device. A detection instrument for detecting the internal oil pressure must be installed in the oil cylinder of the hydraulic press main unit 1. By detecting the oil pressure in the oil cylinder, the force value at the hydraulic push rod 3 can be converted. The transparent door 7 is preferably made of transparent acrylic plastic to facilitate observation of the pressure state of the sample to be tested in the test device, such as a circuit board. It also serves as a shielding and protective shield to prevent test sample debris from splashing and causing injury to the operator during the pressure test.
[0030] The test device further comprises a base 4, connecting columns 5, a top plate 6, and an upper fixture joint 8. The base 4 is welded to the hydraulic head 2. The base 4 has through-holes corresponding to the hydraulic push rods 3, which extend through the through-holes to the top of the base 4. Two sets of connecting columns 5 are welded to either side of the through-holes in the base 4. The top plate 6 is welded to the connecting columns 5, and the upper fixture joint 8 is welded below the top plate 6 at the corresponding through-holes. The test device can be secured to the ground or work surface using expansion bolts. The base 4 and the hydraulic head 2 should be welded securely. Bolting at the four corners before welding is recommended to ensure that the base 4 does not detach from the hydraulic head 2.
[0031] Furthermore, a mounting hole 11 is provided on the hydraulic push rod 3, and a lower fixture 10 is mounted on the hydraulic push rod 3. The lower fixture 10 is plugged into the mounting hole 11. An anti-slip groove 12 is provided on the side of the lower fixture 10, and a mesh marking 13 is provided on the top surface of the lower fixture 10. The mesh marking 13 is used for rapid positioning, and can facilitate the rapid placement of the sample to be tested at a suitable position in the center of the top surface of the lower fixture 10.
[0032] Furthermore, a splitting fixture 14 can also be installed on the hydraulic push rod 3. The top surface of the splitting fixture 14 is provided with a semicircular bump suitable for splitting strength detection. Replacing the lower fixture 10 with the splitting fixture 14 can test the splitting strength of the sample.
[0033] Furthermore, an interface 15 is provided on the upper clamp joint 8 , a stopper groove 16 is provided at the bottom end of the interface 15 , and the upper clamp 9 is installed on the upper clamp joint 8 .
[0034] Furthermore, the upper fixture 9 includes a connecting rod 17, a stopper 18, and an upper clamping block 19. The upper clamping block 19 is welded to one end of the connecting rod 17, and the other end of the connecting rod 17 is provided with a stopper 18. The connecting rod 17 and the stopper 18 are inserted into the interface 15, and the protrusion on the stopper 18 is connected by a snap-fit connection with the stopper groove 16. There are multiple upper fixtures 9, and the thickness of the upper clamping blocks 19 in different upper fixtures 9 varies. Testing samples of different thicknesses will cause the hydraulic push rod 3 to vary in its extension range, reducing measurement accuracy. To improve accuracy, when testing thinner samples, the upper clamping block 19 with a thicker upper fixture 9 needs to be replaced to maintain the distance between the upper fixture 9 and the lower fixture 10.
[0035] Working principle: When it is necessary to use this device to test the compressive strength, open the transparent door 7 and place the sample to be tested on the lower clamp 10, and place it in an appropriate position according to the mesh marking 13. Close the transparent door 7 and operate the hydraulic press main unit 1 to move the hydraulic push rod 3 on the hydraulic head 2 upward. The sample to be tested is subjected to force between the upper clamp 9 and the lower clamp 10 for compressive strength testing. When the sample is damaged, the oil cylinder in the hydraulic press main unit 1 will fluctuate. Record the oil pressure in the cylinder at this time. After conversion, the force value of the hydraulic push rod 3 can be obtained. The compressive strength value is obtained by dividing the force value by the compressed area.
[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pressure test fixture, comprising a hydraulic press main unit (1) and a hydraulic head (2), characterized in that: A hydraulic push rod (3) and a test device are installed on the hydraulic head (2). One end of the hydraulic push rod (3) is installed inside the hydraulic head (2), and the other end extends into the interior through the bottom of the test device. The bottom of the test device is welded to the hydraulic head (2), and a transparent door (7) is installed on the test device.
2. The withstand voltage test fixture according to claim 1, characterized in that: The test device comprises a base (4), a connecting column (5), a top plate (6) and an upper fixture joint (8), the base (4) is welded to the hydraulic head (2), a through hole corresponding to the hydraulic push rod (3) is opened on the base (4), the hydraulic push rod (3) extends to the top of the base (4) through the through hole, two groups of connecting columns (5) are welded on both sides of the through hole of the base (4), the top plate (6) is welded on the connecting column (5), and the upper fixture joint (8) is welded at the corresponding through hole below the top plate (6).
3. The withstand voltage test fixture according to claim 1, characterized in that: The hydraulic push rod (3) is provided with a mounting hole (11), a lower clamp (10) is installed on the hydraulic push rod (3), the lower clamp (10) is plug-connected to the mounting hole (11), a side of the lower clamp (10) is provided with an anti-slip groove (12), and a top surface of the lower clamp (10) is provided with a mesh marking line (13).
4. The withstand voltage test fixture according to claim 3, characterized in that: A splitting fixture (14) can also be installed on the hydraulic push rod (3), and a semicircular protrusion suitable for splitting strength testing is provided on the top surface of the splitting fixture (14).
5. The withstand voltage test fixture according to claim 2, characterized in that: The upper clamp joint (8) is provided with an interface (15), a stopper groove (16) is provided at the bottom end of the interface (15), and an upper clamp (9) is mounted on the upper clamp joint (8).
6. The withstand voltage test fixture according to claim 5, characterized in that: The upper clamp (9) comprises a connecting rod (17), a stopper (18) and an upper clamping block (19), one end of the connecting rod (17) is welded with the upper clamping block (19), and the other end of the connecting rod (17) is provided with a stopper (18), the connecting rod (17) and the stopper (18) are inserted into the interface (15), and the protrusion on the stopper (18) is connected by snapping with the stopper groove (16).