A method for rapidly switching the direction of a test on a test specimen

Abstract

The application discloses a kind of methods for quickly converting test direction of test piece, belong to centrifugal constant acceleration test technical field;Solve the problem that test direction of test piece is converted when existing centrifugal constant acceleration test, complex and inefficient problems of operation.This application method includes: step 1, fixed base is fixed on the cantilever of centrifugal constant acceleration test system;Step 2, active platform is fixed on fixed base;Step 3, test piece is fixed on clamp, then clamp is fixed on active platform;Step 4, centrifugal constant acceleration test is carried out.The method for quickly converting test direction of test piece of the application is simple in operation, only need to change the combination orientation of active platform and fixed base, and the test direction of test piece can be adjusted, which greatly improves the working efficiency of centrifugal constant acceleration test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of centrifugal test technology, in particular to a method for quickly converting the test direction of a test piece. BACKGROUND

[0002] A centrifugal constant acceleration system is an important evaluation method for determining whether electronic products, components, devices and structures can achieve the expected effect under a constant acceleration (steady state acceleration) environment. The test direction of the test piece is determined first when performing the test. The test piece has three orthogonal axial directions, each with two positive and negative directions, for a total of six directions for testing. When installing the test piece, the test piece and the clamp are first weighed, then the clamp is installed on one of the suspended water platforms of the centrifugal constant acceleration test system, and then the test piece is installed on the clamp. Then, the same weight is installed on the other suspended water platform of the centrifugal constant acceleration test system to balance the weight. When changing the direction, the test piece and the clamp need to be disassembled and reassembled in the test direction. The three directions must include two vertical tests. The vertical test requires designing a vertical clamp or a vertical plate, which causes problems such as design cycle, processing cycle and processing cost. The vertical test requires that the test piece and the clamp be disassembled first, then the vertical plate or the independent vertical clamp is weighed, and then installed on the suspended platform of the centrifugal constant acceleration test system. Then, the horizontal clamp and the test piece are installed on the vertical plate or the test piece is directly installed on the independent vertical clamp. Since the vertical plate or the vertical clamp is added, the test mass is inevitably changed. Therefore, the weight of the suspended arm on the other end of the centrifugal constant acceleration test system needs to be adjusted to ensure the dynamic balance of the centrifuge during rotation.

[0003] Overall, the existing centrifugal constant acceleration test method is complicated, inefficient and costly. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a method for quickly converting the test direction of a test piece, to solve the problems of complex operation and low efficiency in converting the test direction of a test piece during the existing centrifugal constant acceleration test.

[0005] The purpose of the present application is mainly achieved by the following technical solutions:

[0006] The present application provides a method for quickly converting the test direction of a test piece, which comprises the following steps:

[0007] Step 1, fixing a fixed base on a suspended arm of a centrifugal constant acceleration test system;

[0008] Step 2, fixing a movable platform on the fixed base;

[0009] Step 3, fix the test piece on the clamp, and then fix the clamp on the movable platform;

[0010] Step 4, carry out the centrifugal constant acceleration test.

[0011] Further, in step 2, when the movable platform is installed in a horizontal manner, one of the second T-shaped pins of the movable platform is inserted into the first T-shaped slot on the fixed base.

[0012] Further, in step 2, the convex rib of the movable platform is embedded into the first groove on the fixed base.

[0013] Further, in step 2, after aligning the two ends of the movable platform with the fixed base, the base locking hole of the fixed base is fixedly connected with the platform locking hole of the movable platform by using a bolt.

[0014] Further, in step 2, when it is necessary to adjust the test direction of the test piece, the phase of the movable platform is rotated by 90°, 180° and 270° in sequence in a clockwise direction, each rotation is performed in a fixed direction, and after each rotation, the operation of step 2 is repeated.

[0015] Further, in step 2, when the horizontal direction test of the test piece is completed, the vertical test is performed: one of the first T-shaped pins of the movable platform is inserted into one of the first T-shaped slots on the fixed base.

[0016] Further, in step 2, the vertical plate protruding part on the movable platform is aligned with the vertical locking hole on the fixed base, and the end of the plug-in plate on the movable platform is embedded into the corresponding concave groove.

[0017] Further, in step 2, the vertical installation locking hole on the fixed base is aligned with the plug-in plate locking hole on the movable platform and is fixed by using a bolt.

[0018] Further, in step 2, when it is necessary to adjust the test direction of the test piece, the phase of the movable platform is rotated by 90°, 180° and 270° in sequence in a clockwise direction, each rotation is performed in a fixed direction, and after each rotation, the operation of step 2 is repeated.

[0019] Further, in step 1, after aligning the fixed base and the cantilever connecting hole reserved on the fixed base with the hole groove reserved on the cantilever, the two are connected by using a bolt.

[0020] Compared with the prior art, the present application can at least achieve one of the following beneficial effects:

[0021] (1) The method for quickly switching the test direction of the test piece of the application can realize the switching of the test direction of the test piece only by the installation direction of the movable platform, without the need to re-adjust the counterweight of another cantilever in the centrifugal constant acceleration test system, which greatly simplifies the test steps of the centrifugal constant acceleration test and improves the test efficiency.

[0022] (2) The application does not need to design a vertical plate or a vertical clamp when the test piece is subjected to vertical test, thereby saving the time and simplifying the steps, and reducing the design, production cycle and processing cost of the vertical plate and the vertical clamp.

[0023] (3) During the test in all directions, the overall test mass remains unchanged (the overall mass of the fixed base and the movable platform does not change), without the need to re-adjust the counterweight due to the addition of the vertical plate or the replacement of the vertical clamp. The movable platform on the fixed base can realize the adjustment of twelve test directions, which provides the most favorable test installation conditions for the centrifugal constant acceleration test of the test piece, saves the time cost, capital cost and labor cost, and improves the work efficiency.

[0024] In the application, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the application will be described in the subsequent specification, and some advantages will become apparent from the specification, or will be understood by implementing the application. The purposes and other advantages of the application can be realized and obtained through the contents specifically indicated in the specification, examples and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the application and are incorporated herein and constitute a part of the application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0026] Figure 1 It is a schematic view of the structure of the fixed base of the application;

[0027] Figure 2 It is a schematic view of the partial structure of the fixed base;

[0028] Figure 3 It is a left view of the fixed base of the application;

[0029] Figure 4 It is a left view of the movable platform;

[0030] Figure 5 It is a schematic view of the structure of the movable platform in a horizontal installation;

[0031] Figure 6 It is a schematic view of the structure of the movable platform in a vertical installation;

[0032] Figure 7 Schematic view of the bottom surface of the fixed base for vertical installation of the movable table top;

[0033] Figure 8 Schematic view of the structure of the transverse part of the second T-shaped pin;

[0034] Figure 9 Schematic view of the flow of the method for quickly converting the test direction of the test piece according to the present application;

[0035] Reference signs:

[0036] 1-fixed base; 2-square boss; 3-first T-shaped groove; 4-base locking hole; 5-vertical locking hole; 6-first recess; 7-insert plate locking hole; 8-vertical limiting baffle; 9-movable table top; 10-table top body; 11-first T-shaped pin; 12-second T-shaped pin; 13-table top locking hole; 14-upright plate protruding part; 15-rib; 16-vertical installation locking hole; 17-third recess; 18-reversed U-shaped recess; 19-second recess; 20-fourth recess. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, which form a part of this application, and which are incorporated herein by reference for purposes of explanation and illustration of the principles of the application, and in which:

[0038] As shown in the drawings, the present application provides a method for quickly converting the test direction of a test piece, which comprises the following steps: Figure 9

[0039] Step 1, fixing the fixed base 1 on the cantilever of the centrifugal constant acceleration test system;

[0040] Step 2, fixing the movable table top 9 on the fixed base 1;

[0041] Step 3, fixing the test piece on the clamp, and then fixing the clamp on the movable table top 9;

[0042] Step 4, performing the centrifugal constant acceleration test.

[0043] It should be noted that when performing the centrifugal constant acceleration test, the test direction of the test piece needs to be determined first. The test piece is divided into three orthogonal axial directions (XC, YC, and ZC three orthogonal axial directions), each axial direction includes two positive and negative directions, a total of six test directions. The present application establishes a coordinate system with the intersection of the two adjacent edges of the base surface of the fixed base 1 as the origin, and defines the directions of the two adjacent edges as the XC and YC directions, respectively, and defines the height direction of the boss on the fixed base 1 as the ZC direction.

[0044] ​In step 1, the reserved fixing base 1 on the fixed base 1 is aligned with the cantilever connecting hole and the reserved hole groove on the cantilever, and then connected by bolts.

[0045] In step 2, when the movable table 9 is installed horizontally, one of the second T-shaped pins of the movable table 9 is inserted into the fixed base 1 along the first T-shaped slot 3 on the fixed base 1.

[0046] In step 2, the convex rib 15 of the movable table 9 is embedded into the first groove 66 on the fixed base 1.

[0047] In step 2, after aligning the two ends of the movable table 9 with the fixed base 1, the base locking hole 4 of the fixed base 1 is fixedly connected with the table locking hole 13 of the movable table 9 by bolts.

[0048] In step 2, when the test direction of the test piece needs to be adjusted, the phase of the movable table 9 is rotated by 90°, 180° and 270° in sequence clockwise, each rotation is performed in a fixed direction, and the operation of step 2 is repeated after each rotation.

[0049] In step 2, when the horizontal direction test of the test piece is completed, the vertical test is performed: one of the first T-shaped pins of the movable table 9 is inserted into the fixed base 1 along one of the first T-shaped slots 3 on the fixed base 1.

[0050] In step 2, the vertical locking hole 5 on the fixed base 1 is aligned with the end of the inserted plate on the movable table 9, and the end of the inserted plate on the movable table 9 is embedded into the corresponding concave groove 18.

[0051] In step 2, the vertical installation locking hole 16 on the fixed base 1 is aligned with the inserted plate locking hole 7 on the movable table 9 and fixed by bolts.

[0052] In step 2, when the test direction of the test piece needs to be adjusted, the movable table 9 is first unlocked, and then the phase of the movable table 9 is rotated by 90°, 180° and 270° in sequence clockwise, each rotation is performed in a fixed direction, and the operation of step 2 is repeated after each rotation; another first T-shaped pin 11 is replaced, and the other first T-shaped pin of the movable table 9 is inserted into the fixed base 1 along one of the first T-shaped slots 3 on the fixed base 1, when the test direction of the test piece needs to be adjusted, the movable table 9 is first unlocked, and then the phase of the movable table 9 is rotated by 90°, 180° and 270° in sequence clockwise, each rotation is performed in a fixed direction, and the operation of step 2 is repeated after each rotation;

[0053] Compared with the prior art, the method for quickly switching the test direction of the test piece can realize the switching of the test direction of the test piece by only the installation direction of the movable platform 9, without the need of adjusting the counterweight of another cantilever in the centrifugal constant acceleration test system, so that the test steps of the centrifugal constant acceleration test are greatly simplified, and the test efficiency is improved.

[0054] In another aspect, the application also provides a device for quickly switching the test direction of the test piece, which is arranged on the cantilever of the centrifugal constant acceleration test system. The device for quickly switching the test direction of the test piece comprises a fixed base 1 and a movable platform 9. The fixed base 1 is provided with a square boss, and the square boss is provided with a first T-shaped groove 3 in the form of an inverted cross in the thickness direction. The movable platform 9 comprises a cuboid platform body 10, and two insertion plates are arranged at the two ends of the long side direction of the platform body 10, and the two insertion plates and the platform body 10 combine to form two first T-shaped pins 11. The two first T-shaped pins 11 can be inserted into the first T-shaped groove.

[0055] Specifically, as shown in the drawings, Figures 1 to 3 The device for quickly switching the test direction of the test piece comprises a fixed base 1 and a movable platform 9. The fixed base 1 is in the form of a cuboid. The cuboid fixed base 1 is provided with a square boss, and the square boss is provided with an inverted cross-shaped first T-shaped groove 3. The groove bottom length direction of the two inverted first T-shaped grooves 3 is parallel to the four edges of the corresponding square boss. In addition, the two inverted first T-shaped grooves 3 intersect and are perpendicular to each other, forming an inverted cross-shaped first T-shaped groove 36. The fixed base 1 is arranged on the cantilever, and the three edges of the fixed base 1 are parallel to the corresponding edges of the cantilever. The movable platform 9 is arranged on the fixed base 1, and the test piece is fixed on the platform body 10 of the movable platform 9 by a clamp.

[0056] When the centrifugal constant acceleration test is performed, any one of the first T-shaped pins 11 on the movable platform 9 is inserted into one of the first T-shaped grooves 3, so as to realize the direction switching of the movable platform 9. Since the position of the test piece on the movable platform 9 is fixed, when the direction of the movable platform 9 is switched, the test piece will be synchronously switched in different directions, so that the test piece can meet the centrifugal constant acceleration test in different directions.

[0057] It should be noted that when the centrifugal constant acceleration test is performed, the test direction of the test piece needs to be determined first. The test piece is divided into three orthogonal axial directions (XC, YC and ZC three orthogonal axial directions), and each axial direction includes two directions (positive and negative), a total of six test directions. The application establishes a coordinate system with the intersection of the two adjacent edges of the base surface of the fixed base as the origin, and defines the directions of the two adjacent edges as the XC and YC directions, and defines the height direction of the boss as the ZC direction.

[0058] The process of adjusting the test direction of the test piece is as follows: when the movable table 9 is vertically installed, as shown in Figure 6 one of the first T-shaped pins 11 is inserted into the first T-shaped slot 3 of the fixed base 1, the movable table 9 can be adjusted and installed in the direction of 90°, 180° and 270° clockwise rotation; then another first T-shaped pin 11 is inserted into the first T-shaped slot 3 of the fixed base 1, and in the same way, the movable table 9 can be adjusted and installed in the direction of 90°, 180° and 270° clockwise rotation, so that the movable table 9 drives the test piece to adjust the test direction.

[0059] In the prior art, when performing centrifugal constant acceleration test, only one direction of constant acceleration test can be realized by one-time installation, and the test piece and the clamp need to be reassembled when the direction is changed. When performing vertical test, a special vertical plate or vertical clamp needs to be installed, and the design and production of the vertical plate increase the test preparation period and test cost. After changing the vertical plate or vertical clamp, the corresponding counterweight also needs to be re-adjusted to ensure the accuracy and safety of the test.

[0060] Compared with the prior art, the present application uses the movable table 9 to change the direction and angle on the fixed base 1, so that the centrifugal constant acceleration system has the ability to quickly change the direction when the test direction is changed, which avoids the frequent disassembly and installation of the test piece and the clamp from the operation, reduces the test risk caused by the increase of the test piece installation times. When performing vertical test, the present application does not need to design a vertical plate or a vertical clamp, which saves time, simplifies the steps, and reduces the design, production cycle and processing cost of the vertical plate and the vertical clamp. In addition, during the test in all directions, the overall test mass remains unchanged (the overall mass of the fixed base 1 and the movable table 9 does not change), and the counterweight does not need to be re-adjusted because of the increase of the vertical plate or the replacement of the vertical clamp. The movable table 9 on the fixed base 1 can realize the adjustment of twelve test directions, which provides the best test installation condition for the centrifugal constant acceleration test of the test piece. In summary, the present application saves time cost, fund cost and labor cost, and improves work efficiency.

[0061] In order to better fix the fixed base 1 on the cantilever, a plurality of fixed base and cantilever connecting holes are reserved on the fixed base 1, for example, eight fixed base and cantilever connecting holes, which are divided into two groups of parallel holes on the two sides of the fixed base 1, and the fixed base 1 is fixed on the cantilever of the centrifugal constant acceleration test system through the eight fixed base and cantilever connecting holes.

[0062] When the movable table 9 is fixed on the fixed base 1 in a horizontal manner, as shown in Figure 1 and Figure 5As shown, in order to increase the stability of the movable platform 9, the length of the square boss is equal to the width and both are greater than the thickness; a first groove 6 is arranged around the square boss near the top surface of the fixed base 1. In addition, two rows of convex ridges are arranged on the side of the plug-in board of the movable platform 9 near the platform body 10; the two rows of convex ridges are arranged along the length direction of the plug-in board and adjacent to the long side of the plug-in board; when the movable platform 9 is installed horizontally, the convex ridges can be embedded in the corresponding first groove 6.

[0063] Compared with the prior art, the present application sets a groove around the square boss and a convex ridge 15 on the platform body 10; when the movable platform 9 is installed horizontally, the convex ridges can be embedded in the corresponding first groove 6, and the stability of the movable platform 9 is increased by the engagement of the two.

[0064] In order to firmly fix the test piece on the movable platform 9, the clamp of the present application is a cuboid plate, and the cuboid plate is provided with a mounting hole for fixing the test piece, and the test piece is fixed on the clamp through the mounting hole. In addition, the movable platform mounting hole is arranged on the platform body 10, and the hole slot corresponding to the position of the movable platform mounting hole is also arranged on the clamp. The opposite surface of the surface of the clamp for fixing the test piece is aligned with and attached to the platform body 10, and the hole slot of the clamp is aligned with the mounting hole of the movable platform, and then connected by bolts, so as to fix the clamp to the movable platform 9.

[0065] It should be noted that the height of the first groove of the present application is equal to 1 / 2 of the height of the square boss, and the first groove of the present application is arranged around the square boss, and the height of the first groove is set to 1 / 2 of the height of the square boss, which can improve the bearing effect of the square boss on the movable platform.

[0066] When the test piece needs to be tested vertically, any one of the two first T-shaped pins 11 is inserted into any one of the first T-shaped slots from one side of the square boss of the fixed base 1; when the vertical test direction needs to be adjusted, the above-mentioned first T-shaped pin 11 is pulled out of the first T-shaped slot, and the movable platform 9 is rotated by 90°, 80° and 70° respectively in clockwise direction to adjust the installation direction of the test piece; similarly, when the vertical test direction needs to be adjusted again, the first T-shaped pin 11 is pulled out of the first T-shaped slot, and then another T-shaped pin is replaced, and the movable platform 9 is rotated by 0°, 0° and 70° respectively in clockwise direction to adjust the installation direction of the test piece.

[0067] In the prior art, when the installation direction of the test piece needs to be changed to adjust the test direction, the test piece and the clamp are sequentially disassembled, the test direction is readjusted, and then the test piece and the clamp are sequentially assembled; in addition, when a vertical test is performed, a vertical clamp or a vertical plate needs to be designed in advance, thereby causing problems such as design period, processing period and processing cost. The vertical test requires that the test piece and the clamp are disassembled first, then the vertical plate or the independent vertical clamp is weighed, and then the horizontal clamp and the test piece are sequentially assembled on the vertical plate or the test piece is directly assembled on the independent vertical clamp. Since the vertical plate or the vertical clamp is added, the test mass is inevitably changed, so the counterweight of the cantilever 1 at the other end of the centrifugal constant acceleration test system also needs to be adjusted to ensure the dynamic balance during the rotation of the centrifuge.

[0068] Compared with the prior art, when the test direction of the test piece is adjusted, the existing vertical plate and vertical clamp do not need to be designed, and the test piece is first fixed on the movable table 9, and the test direction of the test piece is adjusted by changing the direction of the movable table 9.

[0069] In order to be able to install the movable table 9 on the fixed base 1 in a horizontal manner, as shown in Figure 4 , the table body 10 of the present application is provided with a second T-shaped pin 12, and the second T-shaped pin 12 is arranged on the opposite side of the test piece; when the movable table 9 is installed in a horizontal manner, the second T-shaped pin 12 can be inserted into the first T-shaped slot 3.

[0070] Specifically, the second T-shaped pin 12 is arranged on the opposite side of the test piece on the table body 10; and the second T-shaped pin 12 can be inserted into any one of the first T-shaped slots. The first T-shaped pin 11 and the second T-shaped pin 12 each include a horizontal portion and a vertical portion; the second T-shaped pin 12 is arranged on the central axis of the table body 10 parallel to the two insertion plates, and the second T-shaped pin 12 is respectively different from the two first T-shaped pins 11 on the sides thereof by an angle of 90°.

[0071] It should be emphasized that the length of the horizontal portion of the two first insertion pins is greater than the length of the horizontal portion of the second insertion pin.

[0072] In order to further improve the stability of the movable table 9, the fixed base 1 of the present application is a square base, the length of the fixed base 1 is equal to the width, and both are greater than the thickness; the fixed base 1 is provided with a plurality of base locking holes 4; at the same time, the table body 10 is provided with a plurality of table locking holes 13, the number of the base locking holes 4 is equal to the number of the table locking holes 13 and the positions correspond, and when the movable table 9 is installed in a horizontal manner, the base locking holes 4 and the table locking holes 13 are penetrated by bolts.

[0073] Specifically, as shown in Figure 1As shown, the fixed base 1 of the present application is a square base, and a square boss is arranged on the square base, and a plurality of base locking holes 4 are arranged on the square boss, for example, four base locking holes 4 are arranged on the square boss in a square shape. Figure 5 As shown, a plurality of table locking holes 13 are arranged on the table body 10, and the arrangement positions of the table locking holes 13 correspond to the arrangement positions of the base locking holes 4, and the number of the locking holes is equal.

[0074] Compared with the prior art, by arranging the base locking holes 4 and the table locking holes 13, the movable table 9 can be firmly fixed on the fixed base 1 by the bolt penetrating through the base locking holes 4 and the table locking holes 13, so that the dislocation and sliding of the test piece during the centrifugal constant acceleration test are avoided, and the test result is not affected.

[0075] It should be noted that the table locking hole 13 is a counter-sunk hole.

[0076] In order to smoothly install the movable table 9 on the fixed base 1, as shown, Figure 7 As shown, two vertically spaced vertical locking holes 5 are arranged in the first T-shaped groove 3 of the present application, and the vertical locking holes 5 penetrate the fixed base 1. The second groove 19 is arranged on the two sides of the long edge of the table body 10, and the length of the second groove 19 is equal to the spacing distance between the two vertical locking holes 5. The vertical plate protruding part 14 is arranged on the two sides of the second groove 19, and when the movable table 9 is installed vertically, the vertical plate protruding part 14 can be inserted into the corresponding vertical locking hole 5.

[0077] Specifically, as shown, Figure 7 As shown, the vertical locking holes 5 are arranged in the two inverted first T-shaped grooves 3 in a rectangular shape, and the vertical locking holes 5 penetrate the fixed base. Correspondingly, the second groove 19 is arranged on the two sides of the long edge of the table body 10, and the length of the second groove 19 is equal to the spacing distance between the two vertical locking holes 5 in the same first T-shaped groove 3. The vertical plate protruding part 14 is arranged on the two sides of the second groove 19, and the vertical plate protruding part 14 is also a rectangular plate. The vertical plate protruding part 14 can be inserted into the corresponding vertical locking hole 5 to firmly lock the movable table 9 on the fixed base 1, so that the movable table 9 does not shake or displace the test piece during the centrifugal constant acceleration test.

[0078] Compared with the prior art, by arranging the vertical locking holes 5 on the fixed base 1 and the vertical plate protruding part 14 on the movable table 9, the vertically installed movable table 9 can be fixed on the fixed base 1, and the firmness of the movable table 9 is improved.

[0079] In order to further improve the firmness of the movable table top 9 on the fixed base 1, the first T-shaped groove 3 is provided with a concave groove at both ends, and the concave groove penetrates the fixed base 1; when the movable table top 9 is installed vertically, the end of the plug plate can be embedded in the corresponding concave groove 18.

[0080] The vertical limiting baffle 8 is arranged at one end of the two first T-shaped grooves 3, and when the first T-shaped pin 11 or the second T-shaped pin 12 is inserted into the first T-shaped groove 3, it is inserted from the side of the first T-shaped groove 3 without the vertical limiting baffle 8, and when the first T-shaped pin 11 or the second T-shaped pin 12 abuts against the vertical limiting baffle 8, the insertion of the first T-shaped pin 11 or the second T-shaped pin 12 is stopped.

[0081] Compared with the prior art, the vertical limiting baffle 8 can limit the first T-shaped pin 11 or the second T-shaped pin 12 of the movable table top 9 in the first T-shaped groove 3 of the fixed base 1, and when the centrifugal constant acceleration test is carried out, the movable table top 9 is prevented from sliding off the fixed base 1.

[0082] It should be emphasized that the length of the transverse part of the second T-shaped pin 12 is less than the length and width of the square boss 2. In addition, as shown in Figure 8 The two sides of the two ends of the transverse part of the second T-shaped pin 12 are provided with fourth grooves 20, and the purpose of arranging the fourth grooves 20 is to match the shape of the vertical limiting baffle 8 on the fixed base 1.

[0083] It should be noted that the fixed base 1 of the present application is installed on the end face of the centrifuge cantilever. Among the two groups of vertical limiting baffles 8, one group of vertical limiting baffles 8 is in a direction away from the center of the centrifugal motion circle and consistent with the direction of the centrifugal force. The other group of vertical limiting baffles 8 should be consistent with the direction of the centrifugal motion of the centrifuge.

[0084] It should be noted that the width of the transverse part of the first T-shaped groove 3, the first T-shaped pin 11 and the second T-shaped pin 12 is 3:1 compared with the width of the vertical part.

[0085] Compared with the prior art, the width of the transverse part of the first T-shaped groove 3, the first T-shaped pin 11 and the second T-shaped pin 12 is controlled to be 3:1 compared with the width of the vertical part, which can ensure the close engagement between the movable table top 9 and the fixed base 1 and improve the firmness of the connection between the two.

[0086] In order to further improve the firmness of the movable table top 9, the third groove 17 is arranged on the square boss at both sides of the two end positions of the two first T-shaped grooves 3, and the third groove 17 penetrates the square boss; when the movable table top 9 is installed vertically, the two ribs 15 on the plug plate can be embedded in the third groove 17, so as to fix the movable table top 9.

[0087] In addition, such as Figure 6 As shown, a plate locking hole 7 is provided in the third groove 17 along the horizontal direction, and a vertical mounting locking hole 16 is provided near both ends along the length of the plate. When the movable platform 9 is installed vertically, the plate locking hole 7 on the square boss corresponds to the vertical mounting locking hole 16 on the movable platform 9. The fixed base 1 and the movable platform 9 are fixed together by inserting bolts into the plate locking hole 7 and the vertical mounting locking hole 16.

[0088] The specific process of adjusting the test orientation of the test piece using the present invention is as follows: When the test piece is subjected to a horizontal test, the movable platform 9 is inserted horizontally into any one of the first T-slots on the fixed base 1. With the front body in horizontal installation, the movable platform 9 can be rotated clockwise by 90°, 180°, and 270° to adjust the test piece installation orientation, achieving four possible combinations in two directions. When the movable platform 9 is inserted vertically into the first T-slot 3 on the fixed base 1, with the front body in vertical installation, two different surfaces of the movable platform 98 can be rotated clockwise by 90°, 180°, and 270° respectively to adjust the test piece installation orientation, achieving eight possible combinations in four directions.

[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 method for rapidly changing twelve installation positions of a test specimen without the need for rebalancing, characterized in that, The method employs a device for rapidly changing the test direction of the specimen; the device for rapidly changing the test direction of the specimen is mounted on the cantilever of the centrifugal constant acceleration test system; The device for rapidly changing the test direction of the specimen includes a fixed base and a movable platform; the fixed base is provided with a square boss, and the square boss is provided with an inverted first T-shaped groove in the shape of a cross along the thickness direction; the movable platform includes a cuboid platform body, and both ends of the platform body are provided with insert plates, which are combined with the platform body to form two first T-shaped pins; the two first T-shaped pins can be inserted into the first T-shaped grooves. The main body of the platform is provided with a second T-shaped pin, and the second T-shaped pin and the test piece are located on opposite sides of each other; when the movable platform is installed horizontally, the second T-shaped pin can be inserted into the first T-shaped groove. A first groove is provided around the square boss near the top surface of the fixed base; two rows of protrusions are provided on the side of the insert plate of the movable platform near the main body of the platform, the two rows of protrusions are arranged along the length direction of the insert plate and adjacent to the long side of the insert plate; when the movable platform is installed horizontally, the protrusions can be embedded in the corresponding first groove. The first T-slot has two spaced vertical locking holes; the vertical locking holes penetrate the fixed base; the two sides along the long side of the table body have a second groove, the length of which is equal to the distance between the two vertical locking holes; the two sides of the second groove have a vertical plate protrusion, and when the movable table is installed vertically, the vertical plate protrusion can be embedded in the corresponding vertical locking hole. Both ends of the first T-slot are provided with U-shaped grooves, which penetrate the fixed base; when the movable platform is installed vertically, the end of the insert plate can be embedded in the corresponding U-shaped groove. The process of 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 clockwise by 90°, 180°, and 270° to adjust the test piece 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 clockwise by 90°, 180°, and 270° respectively to adjust the test piece installation orientation, achieving eight possible combinations in four directions; The method 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; In step 2, when the movable platform is installed horizontally, one of the second T-shaped pins of the movable platform is inserted into the fixed base along the first T-shaped groove on the fixed base; Step 3: Fix the test piece onto the fixture, and then fix the fixture onto the movable table. Step 4: Conduct a centrifugal constant acceleration test; When the horizontal test of the test piece is completed, the vertical test is carried out: one of the first T-shaped pins of the movable table is inserted into the fixed base along one of the first T-shaped grooves on the fixed base; Align the protruding part of the vertical plate on the movable platform with the vertical locking hole on the fixed base, and insert the end of the insert plate on the movable platform into the corresponding U-shaped groove. Align the vertical mounting locking hole on the fixed base with the insertion plate locking hole on the movable platform and secure it with bolts.

2. The method for rapidly changing twelve installation positions of a test specimen without the need for reweighting, as described in claim 1, is characterized in that... In step 2, the protruding edge of the movable platform is embedded into the first groove on the fixed base.

3. The method for rapidly changing twelve installation positions of a test specimen without the need for rebalancing, as described in claim 2, is characterized in that... In step 2, after aligning both ends of the movable platform with the fixed base, the base locking hole of the fixed base and the platform locking hole of the movable platform are fixedly connected by bolts.

4. The method for rapidly changing twelve installation positions of a test specimen without the need for reweighting, as described in claim 1, is characterized in that... In step 2, when it is necessary to adjust the test direction of the test piece, the phase of the movable platform is rotated clockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and the operation of step 2 is repeated after each rotation.

5. The method for rapidly changing twelve installation positions of a test specimen without the need for rebalancing, as described in claim 4, is characterized in that... In step 2, when it is necessary to adjust the test direction of the test piece, first unlock the movable platform, and then rotate the phase of the movable platform clockwise by 90°, 180° and 270° in sequence. Each rotation is performed in a fixed direction and step 2 is repeated after each rotation.

6. The method for rapidly changing twelve installation positions of a test specimen without the need for rebalancing, as described in any one of claims 1 to 5, 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.

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