A rapid conversion method of test pieces of a centrifugal constant acceleration test system

Abstract

The application discloses a kind of quick conversion method of test piece of centrifugal constant acceleration test system, belong to centrifugal constant acceleration test technical field;Solve the technical problem of complex operation, low efficiency of realization of existing centrifugal constant acceleration test.The method comprises the following steps: step 1, fixed base is fixed on the cantilever of centrifugal constant acceleration test system;Step 2, the movable table is fixed on the fixed base;Step 3, the first safety latch and the second safety latch are inserted into the safety latch hole on the fixed base, and the movable table is locked;Step 4, the test piece is fixed on the fixture, and then the fixture is fixed on the movable table.The centrifugal constant acceleration test method of the application is simple in operation, which greatly improves the working efficiency of centrifugal constant acceleration test.

Description

Technical Field

[0001] This invention relates to the field of centrifugal constant acceleration testing technology, and in particular to a rapid conversion method for test specimens in a centrifugal constant acceleration testing system. Background Technology

[0002] Centrifugal constant acceleration systems are currently an important evaluation tool used by various research institutes to determine whether electronic products, components, equipment, and structures can achieve the expected results when subjected to constant acceleration (steady-state acceleration) environments. They can also be used as a method to reproduce product environments, induce product failures, and improve product environmental adaptability. Their applications are very wide-ranging, covering fields such as aerospace, shipbuilding, consumer products, and life sciences.

[0003] The centrifugal constant acceleration testing system mainly consists of a centrifuge platform, a control system, and a frequency converter. Before testing, the test orientation of the specimen is determined. The specimen is tested along three orthogonal axes, each with two positive and two negative directions, for a total of six directions. When installing the specimen, the specimen and fixture are first weighed. Then, the fixture is installed on one of the cantilever horizontal platforms of the centrifugal constant acceleration testing system, and the specimen is then installed on the fixture. A counterweight of the same weight is then installed on the other cantilever horizontal platform of the centrifugal constant acceleration testing system. When changing orientation, the specimen and fixture need to be disassembled sequentially, the test orientation readjusted, and then reassembled sequentially. Of the three orientations, two vertical tests are necessarily included. Vertical tests require the prior design of vertical fixtures or plates, which raises issues related to design cycle, processing cycle, and processing costs. Vertical testing requires first removing the test piece and fixtures, then weighing the vertical plate or independent vertical fixture, and then installing it on the cantilever platform of the centrifugal constant acceleration testing system. Subsequently, the horizontal fixture and test piece are sequentially installed on the vertical plate, or the test piece is directly installed on the independent vertical fixture. The addition of the vertical plate or fixture inevitably alters the mass of the test specimen. Therefore, the counterweight at the other end of the cantilever of the centrifugal constant acceleration testing system needs to be adjusted to ensure dynamic balance during centrifuge rotation. Overall, the cumbersome operation, low efficiency, and high cost of centrifugal constant acceleration testing systems are mainly due to the specific requirements of their testing.

[0004] In summary, existing testing methods complicate the testing process and increase personnel operational risks, time costs, and economic costs. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a rapid conversion method for test specimens in a centrifugal constant acceleration test system, in order to solve the problems of complex operation and low efficiency of existing centrifugal constant acceleration test methods.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] This invention provides a rapid conversion method for test specimens in a centrifugal constant acceleration test system, the method comprising the following steps:

[0008] Step 1: Fix the fixed base to the cantilever of the centrifugal constant acceleration test system;

[0009] Step 2: Fix the movable platform to the fixed base;

[0010] Step 3: Insert the first and second safety pins into the safety pin holes on the fixed base to lock the movable table surface.

[0011] Step 4: Fix the test piece onto the fixture, and then fix the fixture onto the movable table.

[0012] Furthermore, in step 1, after aligning the pre-reserved fixing base and cantilever connection hole on the fixing base with the pre-reserved slot on the cantilever, they are connected by bolts.

[0013] Furthermore, in step 2, when the test piece is tested in a horizontal manner, the second T-shaped pin of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base, and the two ends of the movable platform are aligned with the fixed base.

[0014] Furthermore, in step 3, after the movable platform is fixed, the movable platform is locked using the horizontal locking ends of the first and second safety pins.

[0015] Furthermore, in step 3, after the movable platform is locked, the fixing holes of the first and second safety pins are aligned with the safety pin insertion holes on the fixed base and connected by bolts.

[0016] Furthermore, it also includes step 5;

[0017] Step 5: When it is necessary to adjust the test direction of the test piece, unlock the first and second safety pins, and then rotate the phase of the movable platform clockwise or counterclockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and steps 2 to 4 are repeated after each rotation.

[0018] Furthermore, in step 2, after the horizontal test of the test piece is completed, the vertical test is carried out: the first T-shaped pin of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base, and the two ends of the movable platform are aligned with the fixed base.

[0019] Furthermore, in step 2, the first T-shaped pin of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base, and the two ends of the movable platform are aligned with the fixed base.

[0020] Furthermore, in step 3, the movable table surface is locked using the vertical locking ends of the first and second safety pins.

[0021] Furthermore, it also includes step 6;

[0022] Step 6: When it is necessary to adjust the test direction of the test piece, unlock the first and second safety pins, and then rotate the phase of the movable platform clockwise or counterclockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and steps 2 to 4 are repeated after each rotation.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) The present invention provides two inverted first T-slots that are perpendicular to each other, which provides a basis for the direction conversion of the movable table. The movable table can be embedded in any one of the inverted first T-slots, thereby realizing the direction conversion of the movable table. Since the position of the test piece on the movable table is fixed, when the direction of the movable table is converted, it will carry the test piece to convert to different directions simultaneously, so that the test piece can meet the centrifugal constant acceleration test in different directions.

[0025] (2) The present invention utilizes the movable platform to change different directions and angles on the fixed base, thereby enabling the centrifugal constant acceleration system to quickly change direction when changing the test direction. Operationally, this avoids the frequent disassembly and installation of test pieces and fixtures, and reduces the test risks caused by the increased number of test piece installations.

[0026] (3) When the test piece is subjected to vertical testing, the present invention does not require the design of a vertical plate or vertical fixture, thus eliminating the work of installing a vertical plate or vertical fixture, saving time, simplifying the steps, and reducing the design of vertical plates and vertical fixtures, as well as the production cycle and processing costs.

[0027] (4) The overall test mass remains unchanged throughout all directional tests (the overall mass of the fixed base and the movable platform does not change), eliminating the need to readjust the counterweight due to the addition of vertical plates or replacement of vertical fixtures. The movable platform on the fixed base allows for adjustments in twelve test directions, providing the most favorable conditions for the installation of the test specimens for centrifugal constant acceleration tests, while saving time, money, and manpower costs and improving work efficiency.

[0028] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0030] Figure 1 This is a schematic diagram of the overall structure of the rapid conversion method for the test specimen in the centrifugal constant acceleration test system of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the fixing base of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the movable platform of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the fixing component of the present invention;

[0034] Figure 5 This is a diagram illustrating the horizontal installation of the movable platform on the fixed base.

[0035] Figure 6 for Figure 5 A schematic diagram of the structure in which the movable platform is fixed to the fixed base after being rotated 90° counterclockwise or clockwise;

[0036] Figure 7 This is a diagram illustrating the installation of a movable tabletop on a fixed base in a vertical manner.

[0037] Figure 8 for Figure 7 A schematic diagram of the structure in which the movable platform is fixed to the fixed base after being rotated 90° counterclockwise;

[0038] Figure 9 This is a schematic diagram of the rapid conversion method for test specimens in the centrifugal constant acceleration test system of the present invention.

[0039] Figure label:

[0040] 1-Rotating arm; 2-Fixed base; 3-Boss; 4-Safety pin insertion hole; 5-Fixed base and cantilever connection hole; 6-First T-slot; 7-Constraint baffle; 8-Movable platform; 9-First T-pin; 10-Movable panel mounting hole; 11-Movable panel safety insertion hole; 12-Fixed component; 13-Vertical safety pin locking end; 14-Safety pin wing; 15-Horizontal safety pin locking end; 16-Square opening; 17-Safety pin fixing hole; 18-Second T-pin; 19-Vertical pin. Detailed Implementation

[0041] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0042] This invention provides a rapid method for changing test specimens in a centrifugal constant acceleration test system, such as... Figure 9 As shown, the method includes the following steps:

[0043] Step 1: Fix the fixed base 2 onto the cantilever 1 of the centrifugal constant acceleration test system;

[0044] Step 2: Fix the movable platform 8 onto the fixed base 2;

[0045] Step 3: Insert the first and second safety pins into the safety pin holes 4 on the fixed base 2 to lock the movable table 8.

[0046] Step 4: Fix the test piece onto the fixture, and then fix the fixture onto the movable table 8.

[0047] It should be noted that when conducting centrifugal constant acceleration tests, the test orientation of the test specimen must be determined first. The test specimen is divided into three orthogonal axes (XC, YC, and ZC), each axis including two positive and two negative directions, for a total of six test orientations. This invention establishes a coordinate system with the intersection of two adjacent sides of the base surface of the fixed base as the origin, the directions of the two adjacent sides as the XC and YC directions respectively, and the height direction of the boss on the fixed base as the ZC direction.

[0048] In step 1, after aligning the pre-drilled holes 5 for connecting the fixed base and cantilever on the fixed base 2 with the pre-drilled slots on the cantilever 1, they are connected by bolts.

[0049] In step 2, when the test piece is tested in a horizontal manner, the second T-shaped pin 18 of the movable platform 8 is inserted into the fixed base 2 along the first T-shaped groove 6 on the fixed base 2, and the two ends of the movable platform 8 are aligned with the fixed base 2.

[0050] In step 3, after the movable platform 8 is fixed, the movable platform 8 is locked in place by using the horizontal locking end 15 of the first and second safety pins.

[0051] In step 3, after the movable platform 8 is locked, the fixing holes of the first and second safety pins are aligned with the safety pin insertion holes 4 on the fixed base 2 and connected by bolts.

[0052] It should be noted that the rapid conversion method of the test piece in the above-mentioned centrifugal constant acceleration test system also includes step 5. In step 5, when it is necessary to adjust the test direction of the test piece, the first safety pin and the second safety pin are unlocked, and then the phase of the movable platform 8 is rotated clockwise or counterclockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and steps 2 to 4 are repeated after each rotation.

[0053] In step 2, when the horizontal test of the test piece is completed, the vertical test is carried out: one of the first T-shaped pins 9 on the movable platform 8 is inserted into the fixed base 2 along the first T-shaped groove 6 on the fixed base 2, and the two ends of the movable platform 8 are aligned with the fixed base 2.

[0054] In step 2, the first T-shaped pin 9 of the movable platform 8 is inserted into the fixed base 2 along the first T-shaped groove 6 on the fixed base 2, and the two ends of the movable platform 8 are aligned with the fixed base 2.

[0055] In step 3, the movable table surface 8 is locked using the vertical locking end 13 of the first and second safety pins.

[0056] It should be noted that the rapid conversion method of the test piece in the above-mentioned centrifugal constant acceleration test system also includes step 6. In step 6, when it is necessary to adjust the test direction of the test piece, the first safety pin and the second safety pin are unlocked, and then the phase of the movable platform 8 is rotated clockwise or counterclockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and steps 2 to 4 are repeated after each rotation.

[0057] It should be noted that the rapid conversion method of the test piece in the above-mentioned centrifugal constant acceleration test system also includes step 7. In step 7, another first T-shaped pin 9 on the movable platform 8 is inserted into the fixed base 2 along the first T-shaped groove 6 on the fixed base 2, and the two ends of the movable platform 8 are aligned with the fixed base 2. Then, the movable platform 8 is locked with the vertical locking end 13 of the first and second safety pins. When it is necessary to adjust the test direction of the test piece, the first and second safety pins are unlocked, and then the phase of the movable platform 8 is rotated clockwise or counterclockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and steps 2 to 4 are repeated after each rotation.

[0058] Compared with the prior art, the rapid conversion method of the test specimen in the centrifugal constant acceleration test system of the present invention can realize the conversion of the test direction of the test specimen only by changing the installation direction of the movable platform. There is no need to readjust the counterweight of the other cantilever in the centrifugal constant acceleration test system. This method greatly simplifies the test steps of the centrifugal constant acceleration test and improves the test efficiency.

[0059] The present invention also provides a rapid conversion device for test specimens in a centrifugal constant acceleration test system, which is used to realize a rapid conversion method for test specimens in a centrifugal constant acceleration test system. The centrifugal constant acceleration test system includes a cantilever 1; the rapid conversion device includes a fixed base 2 and a movable platform 8; the fixed base 2 is fixed on the cantilever 1, and the test specimen is fixed on the movable platform 8 by a clamp; the movable platform 8 is fixed on the fixed base 2 and can be converted to different directions on the fixed base 2.

[0060] Specifically, such as Figure 1 As shown, the centrifugal constant acceleration test system of the present invention adopts the existing centrifugal constant acceleration test system. The centrifugal constant acceleration test system is provided with a cantilever 1, and a fixed base 2 is fixed on the cantilever 1. The test piece is first fixedly connected to the clamp, and then the clamp is fixed on the movable table 8, which is installed on the fixed base 2.

[0061] It should be noted that, as Figures 5 to 8 As shown, the movable platform 8 can be installed horizontally or vertically on the fixed base 2. When the movable platform 8 is installed horizontally, its installation direction can be adjusted by rotating it clockwise or counterclockwise by 90°, 180°, and 270°. When the movable platform 8 is installed vertically, its installation direction can also be adjusted by rotating it clockwise or counterclockwise by 90°, 180°, and 270°.

[0062] Existing centrifugal constant acceleration testing systems can only perform constant acceleration tests in one direction with a single installation. Changing the direction requires reassembling and disassembling the test specimen and fixtures. Vertical testing also requires the installation of a dedicated vertical plate or fixture, the design and production of which increase the test preparation time and cost. Furthermore, changing the vertical plate or fixture necessitates readjusting the corresponding counterweights to ensure the accuracy and safety of the test.

[0063] Compared with existing technologies, this invention utilizes the movable platform 8 to switch different directions and angles on the fixed base 2, thereby enabling the centrifugal constant acceleration system to quickly change direction during test orientation changes. Operationally, this avoids frequent disassembly and assembly of the test specimen and fixtures, reducing the test risks caused by increased test specimen assembly frequency. When the test specimen is subjected to vertical testing, this invention eliminates the need for designing vertical plates or fixtures, saving time, simplifying procedures, and reducing the design, production cycle, and processing costs associated with vertical plates and fixtures. Furthermore, the overall test mass remains constant throughout all test orientations (the overall mass of the fixed base 2 and the movable platform 8 does not change), eliminating the need to readjust the counterweight due to adding vertical plates or replacing vertical fixtures. The movable platform 8 on the fixed base 2 allows for adjustments to twelve test orientations, providing optimal conditions for test setup during centrifugal constant acceleration testing. In summary, this invention saves time, capital, and labor costs, and improves work efficiency.

[0064] In order to better fix the fixed base 2 to the cantilever 1, multiple fixed base and cantilever connection holes 5 are reserved on the fixed base 2, such as eight fixed base and cantilever connection holes 5. The eight fixed base and cantilever connection holes 5 are arranged in two parallel groups on both sides of the fixed base 2. The fixed base 2 is fixed to the cantilever 1 of the centrifugal constant acceleration test system through the eight fixed base and cantilever connection holes 5.

[0065] To increase the stability of the movable platform 8, the fixed base 2 of the present invention is cuboid in shape; the cuboid fixed base 2 is provided with a cuboid boss 3, and the boss 3 is provided with an inverted cross-shaped first T-shaped groove 6; a square opening 16 is provided in the center of the boss 3; the square opening 16 penetrates the boss 3 along the depth direction of the boss 3.

[0066] like Figure 2As shown, the fixed base 2 is cuboid in shape and is fixed to the cantilever 1. The three sides of the fixed base 2 are parallel to the corresponding sides of the cantilever 1. The boss 3 is located at the geometric center of the fixed base 2 in plan view. The length and width of the boss 3 are equal, and both the length and width of the boss 3 are greater than the height of the boss 3. The boss 3 is provided with two inverted first T-shaped grooves. The length direction of the bottom of the two inverted first T-shaped grooves is parallel to the four sides of the corresponding boss 3. In addition, the two inverted first T-shaped grooves intersect and are perpendicular to each other, forming an inverted cross-shaped combination of first T-shaped grooves 6.

[0067] Compared with the prior art, the present invention sets two mutually perpendicular inverted first T-slots, which provide a basis for the orientation change of the movable platform 8. The movable platform 8 can be embedded in any one of the inverted first T-slots, thereby realizing the orientation change of the movable platform 8. Since the position of the test piece on the movable platform 8 is fixed, when the orientation of the movable platform 8 is changed, it will carry the test piece to synchronously change to different orientations, so that the test piece can meet the centrifugal constant acceleration test in different directions.

[0068] In existing technologies, when the installation direction of the test piece needs to be changed to adjust the test direction, the test piece and fixture need to be disassembled sequentially, the test direction readjusted, and then the test piece and fixture reinstalled sequentially. Furthermore, when conducting vertical tests, the vertical fixture or plate needs to be designed first, resulting in issues related to design cycle, processing cycle, and processing cost. Conducting vertical tests requires first removing the test piece and fixture, then weighing the vertical plate or independent vertical fixture, and then installing it on the cantilever 1 platform of the centrifugal constant acceleration testing system. Subsequently, the horizontal fixture and test piece are sequentially installed on the vertical plate, or the test piece is directly installed on the independent vertical fixture. Because the addition of the vertical plate or fixture inevitably causes changes in the mass of the test specimen, the counterweight of the other end of the cantilever 1 of the centrifugal constant acceleration testing system also needs to be adjusted to ensure dynamic balance during the centrifuge rotation process.

[0069] Compared with the prior art, the present invention does not require the design of existing upright plates and vertical fixtures when adjusting the test direction of the test specimen. The present invention first fixes the test specimen on the movable table 8, and adjusts the test direction of the test specimen by changing the direction of the movable table 8.

[0070] The specific process for adjusting the test orientation of the test specimen is as follows: Figures 5 to 8As shown, when the test piece is subjected to a horizontal test, the movable platform 8 is inserted horizontally into any one of the T-slots on the fixed base 2. With the front of the horizontal installation in place, the movable platform 8 can be rotated 90°, 180°, and 270° clockwise or counterclockwise to adjust the orientation of the test piece, achieving four possible combinations in two directions. When the movable platform 8 is inserted vertically into the T-slot on the fixed base 2, with the front of the vertical installation in place, two different surfaces of the movable platform 8 can be rotated 90°, 180°, and 270° clockwise or counterclockwise respectively to adjust the orientation of the test piece, achieving eight possible combinations in four directions.

[0071] It should be emphasized that the entire test process using the rapid conversion device of the present invention is convenient and quick to operate because it does not require the processing of special vertical plates and vertical fixtures. It also ensures that the test mass remains constant in all test directions without the need for counterweight adjustment. The present invention effectively solves the problems of existing centrifugal constant acceleration test systems, such as complicated operation and long test preparation time when changing test directions, which leads to increased economic costs and safety risks for personnel.

[0072] The present invention provides two mutually perpendicular inverted first T-slots, which provide a basis for the orientation change of the movable platform 8. The movable platform 8 can be embedded in any one of the inverted first T-slots to realize the orientation change of the movable platform 8. Since the position of the test piece on the movable platform 8 is fixed, when the orientation of the movable platform 8 is changed, the test piece will be carried to change the orientation synchronously, so that the test piece can meet the centrifugal constant acceleration test in different directions.

[0073] It should be noted that, as Figure 1 As shown, when conducting centrifugal constant acceleration tests using a centrifugal constant acceleration system, the test orientation of the test specimen needs to be determined first. The test specimen is divided into three orthogonal axes (XC, YC, and ZC), each axis including two positive and two negative directions, for a total of six test orientations. In this invention, the origin is the intersection of two adjacent sides of the base surface of the fixed base, the directions of the two adjacent sides are defined as the XC and YC directions respectively, and the height direction of the boss is defined as the ZC direction to establish a coordinate system.

[0074] It is important to note that the depth of the square opening 16 on the boss 3 is equal to the height of the first T-slot; the length and width of the square opening 16 are both equal to the width of the bottom of the first T-slot. Furthermore, the inverted first T-slot includes a bottom horizontal slot and a top vertical slot, wherein the width of the bottom horizontal slot is equal to the height of the first T-slot (including the height of the bottom horizontal slot plus the height of the top vertical slot); and the ratio of the width of the bottom horizontal slot to the width of the top vertical slot is 3:1 to 5:1. This ensures that the movable platform 8 and the fixed base 2 maintain optimal contact when changing direction.

[0075] In order to ensure that the movable tabletop 8 can be flexibly adjusted in installation direction on the fixed base 2, the movable tabletop 8 of the present invention includes a cuboid tabletop body, and insert plates are provided at both ends along the long side of the tabletop body. The two insert plates and the tabletop body are combined to form two first T-shaped pins 9; the two first T-shaped pins 9 can be inserted into the T-shaped groove.

[0076] Specifically, such as Figure 3 As shown, the length and width of the main body of the tabletop are equal and both are greater than the thickness of the main body of the tabletop. Along the length direction of the main body of the tabletop, there are insert plates on the end faces of both ends of the main body of the tabletop. The two insert plates and the main body of the tabletop are combined to form two first T-shaped pins 9. The insert plates of the two first T-shaped pins 9 are arranged in parallel.

[0077] To securely fix the test specimen to the movable table 8, the fixture of this invention is a cuboid plate with mounting holes for fixing the test specimen. The test specimen is fixed to the fixture through the mounting holes. Additionally, the main body of the table has movable panel mounting holes 10, and the fixture also has slots corresponding to the positions of the movable panel mounting holes 10. The opposite side of the fixture's test specimen fixing surface is aligned with and fits against the main body of the table. After the slots of the fixture are aligned with the movable panel mounting holes, they are connected by bolts, thereby fixing the fixture to the movable table 8.

[0078] When the test piece needs to be tested vertically, insert either of the two first T-shaped pins 9 into either of the T-slots from one side of the boss 3 of the fixed base 2. When the vertical test direction needs to be adjusted, pull the first T-shaped pin 9 out of the T-slot and rotate the movable platform 8 clockwise or counterclockwise by 90°, 180° and 270° respectively to adjust the test piece installation direction. Similarly, when the vertical test direction needs to be adjusted again, pull the first T-shaped pin 9 out of the T-slot and replace it with another T-shaped pin, and rotate the movable platform 8 clockwise or counterclockwise by 90°, 180° and 270° respectively to adjust the test piece installation direction.

[0079] To further increase the vertical testing orientation of the test specimen, the present invention provides a second T-shaped pin 18 on the main body of the platform, and the second T-shaped pin 18 is located on the opposite side of the test specimen; the second T-shaped pin 18 can be inserted into any T-shaped slot.

[0080] Specifically, such as Figure 3 As shown, both the first T-shaped pin 9 and the second T-shaped pin 18 include a horizontal portion and a vertical portion. The second T-shaped pin 18 is located on the central axis of the table body parallel to the two insert plates, and the angle between the second T-shaped pin 18 and the first T-shaped pins 9 on both sides differs by 90°. The width of the horizontal portion of the three sets of T-shaped pins is in a 1:5 ratio with the width of the vertical portion, which is the same as the size of the T-slot.

[0081] It should be emphasized that the length of the lateral portion of the two first pins is greater than the length of the lateral portion of the second pin.

[0082] It should be noted that the first T-slot includes a bottom horizontal slot and a top vertical slot; the thickness of the movable platform 8 is equal to the width of the top vertical slot. Furthermore, the ratio of the width of the bottom horizontal slot to the width of the top vertical slot is 1:5.

[0083] To securely fix the movable platform 8 to the fixed base 2, the boss 3 of the present invention is surrounded by a constraint baffle 7, which is parallel to the adjacent side of the boss 3. Furthermore, the height of the constraint baffle 7 is the same as the height of the boss 3 and is equal to 2 / 5 of the width of the bottom of the T-slot. The T-slot of the fixed base 2 extends horizontally through the boss 3 and the constraint baffle 7.

[0084] Specifically, eight sets of constraint baffles 7 surround the boss 3. The constraint baffles 7 are parallel to the edges of the adjacent boss 3. The height of the constraint baffles 7 is the same as the height of the boss 3, and both are equal to 2 / 5 of the bottom width of the T-slot. The T-slot passes through the boss 3 and the constraint baffles 7 in the horizontal direction. The distance between the constraint baffles 7 and the boss 3 of the base is the depth value of the bottom transverse groove of the T-slot.

[0085] In order to constrain the movable tabletop 8, the quick conversion device of the present invention also includes two fixing components 12; when the second T-shaped pin 18 or one of the first T-shaped pins 9 on the movable tabletop 8 is inserted into any T-shaped groove on the fixing base 2, the movable tabletop 8 is fixed by the two fixing components 12.

[0086] Specifically, such as Figure 4As shown, the two fixing components 12 of the present invention are two safety pins; the two safety pins are a first safety pin and a second safety pin, and the first safety pin and the second safety pin have the same structure; both the first safety pin and the second safety pin include a pin body, which is rectangular in shape. Along the length direction of the pin body, the pin body is provided with a vertical safety pin locking end 13 and a horizontal safety pin locking end 15, which are located on opposite surfaces; a groove is provided on the end face of the vertical safety pin locking end 13, and the width of the groove is... The width of the insert plate on the movable platform 8 is equal to the width of the insert plate. In addition, two parallel vertical pins 19 are provided in the groove, and movable panel safety holes 11 are provided at both ends along the length of the insert plate. When the movable platform 8 is inserted vertically into the first T-slot on the boss 3, the first safety pin and the second safety pin are inserted on the outer side of the two insert plates of the movable platform 8, respectively. At this time, the two vertical pins 19 of the first safety pin and the second safety pin can be inserted into the movable panel safety holes 11 on the corresponding insert plates to achieve the vertical safety pin locking state, thereby fixing the movable platform 8.

[0087] In addition, in order to fix the first and second safety pins, grooves are provided on both ends of the safety pin body that are parallel to the vertical pin 19. By setting the grooves, the two ends of the pin body respectively form safety pin wings. The safety pin wings are provided with fixing holes, and the base is provided with safety pin fixing holes 17. The fixing holes on the safety pin wings and the safety pin fixing holes 17 on the base can be aligned and connected by bolts.

[0088] A cubic block-shaped horizontal pin is provided at the locking end 15 of the horizontal safety pin; in addition, safety pin insertion holes 4 are opened on the four sides of the boss 3. The opening position of the safety pin insertion hole 4 is located between the constraint baffle 7 and the boss 3, adjacent to the extension surface of the first T-slot; the depth direction of the safety pin insertion hole 4 penetrates the fixed base 2, and the length and width of the safety pin insertion hole 4 are equal to the width of the bottom transverse groove of the first T-slot (i.e., the bottom width of the first T-slot) and the height; when the movable platform 8 is inserted into the first T-slot on the boss 3 in a horizontal manner, the first safety pin and the second safety pin are respectively inserted at both ends of the second pin of the movable platform 8. At this time, the horizontal pins of the first safety pin and the second safety pin can be inserted into the safety pin insertion hole 4 on the fixed base 2 to achieve the horizontal safety pin locking state, thereby fixing the movable platform 8.

[0089] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A rapid switching method for test specimens in a centrifugal constant acceleration test system capable of adjusting twelve test orientations without requiring reweighting, characterized in that, Includes the following steps: Step 1: Fix the fixed base to the cantilever of the centrifugal constant acceleration test system; Step 2: Fix the movable platform to the fixed base; Step 3: Insert the first and second safety pins into the safety pin holes on the fixed base to lock the movable table surface. Step 4: Fix the test piece onto the fixture, and then fix the fixture onto the movable table. Throughout all directional tests, the overall test mass of the fixed base and the movable platform remained unchanged. The fixing base is cuboid in shape; the fixing base is provided with a cuboid-shaped boss, and the boss is provided with an inverted cross-shaped first T-slot; a square opening is provided in the center of the boss; the square opening penetrates the boss along the vertical direction of the boss. The position of the test specimen on the movable platform is fixed; the movable platform can be installed horizontally on the fixed base or vertically on the fixed base. The movable tabletop includes a rectangular tabletop body, with insert plates at both ends along the long side of the tabletop body. The two insert plates and the tabletop body are combined to form two first T-shaped pins; the two first T-shaped pins can be inserted into the first T-shaped slots. The main body of the platform is provided with a second T-shaped pin, which is located on the opposite side of the test piece; the second T-shaped pin can be inserted into the first T-shaped groove. The specific process for adjusting the test orientation of the test piece is as follows: When the test piece is subjected to a horizontal test, the movable platform is inserted into any one of the first T-slots on the fixed base in a horizontal position. Under the horizontal mounting front body, the movable platform can be rotated 90°, 180°, and 270° clockwise or counterclockwise to adjust the test piece's installation orientation, achieving four possible combinations in two directions. When the movable platform is inserted into the first T-slot on the fixed base in a vertical position, under the vertical mounting front body, two different surfaces of the movable platform can be rotated 90°, 180°, and 270° clockwise or counterclockwise respectively to adjust the test piece's installation orientation, achieving eight possible combinations in four directions. The quick conversion device also includes two fixed components; When the second T-shaped pin on the movable platform or any one of the first T-shaped pins is inserted into one of the first T-shaped slots on the fixed base, the two fixed components can fix the movable platform. The two fixing components are a first safety pin and a second safety pin, which have the same structure. Both the first and second safety pins include a pin body, which is rectangular in shape. Along the length of the pin body, the pin body has a vertical safety pin locking end and a horizontal safety pin locking end, which are located on opposite surfaces. A groove is provided on the end face of the vertical safety pin locking end, the width of which is equal to the width of the insert plate on the movable platform. Two parallel vertical pins are provided in the groove, and movable panel safety insertion holes are provided at both ends along the length of the insert plate. When the movable platform is vertically inserted into the first T-slot on the boss, the first and second safety pins are inserted on the outer sides of the two insert plates of the movable platform. At this time, the two vertical pins of the first and second safety pins can be inserted into the movable panel safety insertion holes on the corresponding insert plates, achieving a vertical safety pin locking state to fix the movable platform. On the main body of the safety pin, grooves are provided on both ends of the face parallel to the vertical pin. By setting the grooves, the two ends of the main body of the pin form safety pin wings. The safety pin wings are provided with fixing holes, and the base is provided with safety pin fixing holes. The fixing holes on the safety pin wings and the safety pin fixing holes on the base can be aligned and connected by bolts. A cubic block-shaped horizontal pin is provided at the locking end of the horizontal safety pin; safety pin insertion holes are opened on all four sides of the boss; the depth direction of the safety pin insertion holes penetrates the fixed base; when the movable platform is inserted into the first T-slot on the boss in a horizontal manner, the first safety pin and the second safety pin are respectively inserted at both ends of the second pin on the movable platform, and the horizontal pins of the first safety pin and the second safety pin can be inserted into the safety pin insertion holes on the fixed base to achieve the horizontal safety pin locking state and fix the movable platform.

2. The rapid conversion method for test specimens in the centrifugal constant acceleration test system capable of adjusting twelve test orientations without the need for reweighting, as described in claim 1, is characterized in that... In step 1, after aligning the pre-drilled holes for the fixed base and the cantilever connection holes with the pre-drilled slots on the cantilever, they are connected by bolts.

3. The rapid conversion method for test specimens in the centrifugal constant acceleration test system capable of adjusting twelve test orientations without the need for reweighting, as described in claim 2, is characterized in that... In step 2, when the test piece is tested in a horizontal manner, the second T-shaped pin of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base, and the two ends of the movable platform are aligned with the fixed base.

4. The rapid specimen switching method of the centrifugal constant acceleration test system capable of adjusting twelve test orientations without the need for reweighting, as described in claim 3, is characterized in that... In step 3, after the movable platform is fixed, the movable platform is locked using the horizontal locking end of the first and second safety pins.

5. The rapid conversion method for test specimens in the centrifugal constant acceleration test system capable of adjusting twelve test orientations without the need for reweighting, as described in claim 4, is characterized in that... In step 3, after the movable platform is locked, the fixing holes of the first and second safety pins are aligned with the safety pin insertion holes on the fixed base and connected by bolts.

6. The rapid conversion method for test specimens in the centrifugal constant acceleration test system capable of adjusting twelve test orientations without the need for reweighting, as described in claim 5, is characterized in that... In step 2, when the horizontal test of the test piece is completed, the vertical test is carried out: the first T-shaped pin of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base, and the two ends of the movable platform are aligned with the fixed base.

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