CN115219138A - A kind of composite material sheet impact performance testing device and testing method for aviation - Google Patents

Abstract

The invention relates to a device and a method for testing the impact performance of a composite material sheet for aviation, wherein the device comprises a sample clamping seat, a transverse moving mechanism and a clamping mechanism; a guide pipe is arranged above the sample clamping seat, the guide pipe is fixed above the sample clamping seat through a support, an impact rod penetrates through the guide pipe, the top of the impact rod penetrates out of the guide pipe to be connected with a clamping mechanism, the clamping mechanism is fixed on the support, and a gap is formed between the bottom of the guide pipe and the sample clamping seat; the device also comprises an anti-impact baffle positioned in the gap between the sample clamping seat and the guide pipe, wherein one end of the anti-impact baffle extends out of the sample clamping seat and is connected with a transverse moving mechanism, and the transverse moving mechanism and the sample clamping seat are arranged at intervals and are distributed along the length of the sample clamping seat; the device for testing the impact performance of the composite material sheet for aviation solves the problems that manual operation is needed when an impact rod falls down, secondary impact occurs after the impact rod falls down, and the test result is inaccurate in the prior art.

Description

A kind of composite material sheet impact performance testing device and testing method for aviation

technical field

The invention relates to the field of impact performance testing devices, in particular to a composite material sheet impact performance testing device and a testing method for aviation.

Background technique

With the development of the domestic civil aviation industry, the research and development of supporting aviation composite materials has also ushered in a period of opportunity. Among them, the impact of composite materials, as an important technical index, encountered problems when testing material properties, mainly when developing composite skin materials, because the thickness of the material is relatively thin, only a few millimeters, refer to the relevant foreign specifications for impact testing. At the time, it was found that the domestic impact test methods such as falling ball impact and pendulum impact were not applicable, and the corresponding impact test device also had the problem of inapplicability.

Patent CN 105259055 A, discloses a tempered glass film impact test device, comprising a vertically arranged bench, a positioning rod horizontally arranged on the bench, the middle of the positioning rod is provided with a piercing hole, the piercing A vertical impact rod is arranged in the hole, an impact head is connected to the lower end of the impact rod, a traction wire is connected to the upper end of the impact rod, and a scale is arranged on the impact rod; Glass film positioning device. Manual control of the traction wire is required, and the impact rod cannot be automatically clamped and released, which affects the impact rod’s descent, and the test results are inaccurate. Moreover, after the impact rod and the impact head fall freely, the impact positioning device, the impact rod and the impact head will rebound. The positioning device makes a second impact and cannot accurately test the impact performance.

Therefore, in view of the above problems, the present invention is in urgent need of providing a testing device and testing method for the impact performance of composite sheet for aviation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a composite material sheet impact performance testing device and a testing method for aviation, through the structural design of the composite material sheet impact performance testing device for aviation to solve the need for manual operation when the impact rod falls in the prior art, the impact rod A secondary impact occurs after falling, and the test result is inaccurate.

The invention provides a device for testing the impact performance of a composite material sheet for aviation, which includes a sample holding seat, a lateral movement mechanism and a holding mechanism; a guide tube is arranged above the sample holding seat, and the guide tube is fixed on a bracket through a bracket. Above the sample holding seat, an impact rod is inserted into the guide tube, the top of the impact rod passes through the guide tube and is connected to the clamping mechanism, the clamping mechanism is fixed on the bracket, and there is a gap between the bottom of the guide tube and the sample holding seat ;

It also includes an anti-impact baffle located at the gap between the sample holder and the guide tube. One end of the anti-impact baffle extends out of the sample holder and is connected to the lateral movement mechanism. The lateral movement mechanism and the sample holder are arranged at intervals and along the The length of the sample holder is arranged;

It also includes a master control switch, a timer, a controller and a photoelectric reflector installed on the anti-shock baffle; the master control switch, the photoelectric reflector are electrically connected to the controller, and the clamping mechanism, the timer and the lateral movement mechanism are electrically connected. connect.

Preferably, the top end of the guide tube is provided with a snap ring for clipping the cursor locator; and a cursor locator is also included, and the cursor locator is connected to the guide tube through the snap ring.

Preferably, the top of the sample holder is provided with an installation groove for fixing the sample, and the installation groove is provided with an impact mark point.

Preferably, the bracket includes two vertical plates arranged at intervals, the tops of the two vertical plates are connected together by a connecting plate, the bottom of each vertical plate is provided with feet, and the connecting plate is provided with a piercing hole for the guide tube to be inserted.

Preferably, a plurality of reinforcing plates are arranged at intervals along the height between the two vertical plates, and each reinforcing plate is provided with a through hole corresponding to the guide tube, and each through hole and the through hole are arranged coaxially.

Preferably, the gap between the sample holder and the guide tube is further provided with a first slide rail and a second slide rail arranged at intervals, and both ends of the first slide rail and the second slide rail are respectively connected with the corresponding vertical plates; The impact baffle is overlapped on the first sliding rail and the second sliding rail.

Preferably, the clamping mechanism includes a first air cylinder and a second air cylinder respectively disposed on both sides of the piercing hole, the telescopic rods of the first air cylinder and the second air cylinder are arranged opposite to each other, and the ends of the telescopic rods of the first air cylinder and the second air cylinder are provided with A first striker clamping head and a second striker clamping head that clamp the striker.

Preferably, the inner side of the arc of the first impact rod clamping head and the second impact rod clamping head are provided with convex ribs, and the outer wall of the impact rod is provided with convex ribs.

Preferably, a marking line is provided on the impact rod, and an adjusting foot pad is provided at the bottom of each leg.

The present invention also provides a test method based on the impact property testing device of the composite material sheet for aviation as described in any one of the above, comprising the following steps:

S1: Fix the cursor locator on the retaining ring of the guide tube, turn on the cursor locator, and adjust the position of the sample holder so that the impact marking point coincides with the cursor locator;

S2: Turn off and remove the cursor locator, put the impact rod into the guide tube, and adjust the height of the impact rod up and down;

S3: Start the master control switch, control the clamping mechanism to release the impact rod through the controller, and control the timer to start;

S4: When the impact rod falls and hits the sample holder and then bounces upward, the photoelectric reflector sends a detection signal to the controller, and the controller controls the lateral movement mechanism to drive the anti-shock baffle to move to the impact mark on the sample holder Click right above and control the timer to stop.

Compared with the prior art, the impact performance testing device and testing method of composite material sheet for aviation provided by the present invention have the following improvements:

1. The present invention provides a device for testing the impact performance of a composite material sheet for aviation. The design of the anti-shock baffle is controlled by a lateral movement mechanism. The impact rod bounces up after hitting the impact sample. The impact rod passes the photoelectric reflector and starts the photoelectric For the ejector, the impact baffle is controlled by the lateral movement mechanism and the controller to move to the top of the sample holder, which avoids the second impact of the impact rod on the impact sample, and solves the problem of inaccurate test data due to the second impact. The problem.

2. The present invention provides a device for testing the impact performance of a composite material sheet for aviation. Through the design of the clamping mechanism, the height of the impact rod is adjusted. The impact rod clamping head clamps the impact rod and releases the impact rod to realize the automatic clamping of the impact rod. Hold and release, solve the centering problem of the impact rod, no manual operation is required, automatic control, and the test is more accurate.

3. The present invention provides a device for testing the impact performance of a composite material sheet for aviation. Through the design of the sample holding seat, the position of the sample holding seat is adjusted so that the impact mark point coincides with the cross cursor of the cursor locator to ensure that the The impact bar hits the designated position when it falls.

4. The present invention provides a device for testing the impact performance of composite material sheet for aviation. Through the inner measurement of the impact rod clamping head and the design of the outer wall of the impact rod, the gap between the impact rod clamping head and the impact rod is increased. The friction force plays the role of anti-slip, and also reduces the friction force between the impact rod and the inner side of the guide tube, which solves the problem that the impact energy becomes small and cannot be quantitatively calculated due to the friction between the impact rod and the guide tube.

5. The present invention provides a method for testing the impact performance test device of composite material sheet for aviation. Through the design of the impact performance test device for composite material sheet for aviation, the landing position of the impact rod can be accurately positioned, the automatic control of the impact rod can be realized, and the impact can be prevented. The secondary impact of the rod on the impact sample improves the automation of the impact performance testing device, and the test results are more accurate.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the structural representation (front perspective view) of the composite material sheet impact performance testing device for aviation described in the present invention;

Description of reference numbers:

1. Bracket; 2. Sample holder; 3. Lateral movement mechanism; 4. Guide tube; 5. Impact rod; 6. Clamping mechanism; 7. Anti-shock baffle; 8. First slide rail; 9. The second slide rail; 101, the vertical plate; 102, the connecting plate; 103, the foot; 104, the reinforcement plate; 105, the adjusting foot pad; 201, the installation groove; 202, the impact mark point; Two cylinders; 603, a first impact rod clamping head; 604, a second impact rod clamping head.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 , this embodiment provides a device for testing the impact performance of a composite sheet for aviation, including a sample holder 2 , a lateral movement mechanism 3 and a holder 6 ; the upper part of the sample holder 2 is A guide tube 4 is provided. The guide tube 4 is fixed above the sample holder 2 through the bracket 1. The guide tube 4 is equipped with an impact rod 5. The top of the impact rod 5 passes through the guide tube 4 and is connected to the clamping mechanism 6. The clamping mechanism 6 is fixed on the bracket 1, and there is a gap between the bottom of the guide tube 4 and the sample holder 2; it also includes an anti-shock baffle 7 located at the gap between the sample holder 2 and the guide tube 4 to prevent impact One end of the baffle plate 7 extends out of the sample holder 2 and is connected to the lateral movement mechanism 3. The lateral movement mechanism 3 and the sample holder 2 are arranged at intervals and along the length of the sample holder 2; it also includes a master control switch, a timer The main control switch, the photoelectric reflector and the controller are electrically connected, and the clamping mechanism 6, the timer and the lateral movement mechanism 3 are electrically connected.

The invention provides an impact performance testing device of composite material sheet for aviation, which comprises a sample holding seat 2, a lateral movement mechanism 3 and a holding mechanism 6; a guide tube 4 is arranged above the sample holding seat 2, The guide tube 4 is fixed above the sample holder 2 through the bracket 1. The guide tube 4 is equipped with an impact rod 5. The top of the impact rod 5 passes through the guide tube 4 and is connected to the clamping mechanism 6. The clamping mechanism 6 is fixed on the On the bracket 1, there is a gap between the bottom of the guide tube 4 and the sample holder 2; it also includes an anti-impact baffle 7 located at the gap between the sample holder 2 and the guide tube 4, and one end of the anti-impact baffle 7 extends out The sample holder 2 is connected with the lateral movement mechanism 3, and the lateral movement mechanism 3 is arranged at intervals from the sample holder 2 and is arranged along the length of the sample holder 2; it also includes a master control switch, a timer, a controller and an installation The photoelectric reflector on the anti-shock baffle 7; the main control switch, the photoelectric reflector are electrically connected to the controller, the design of the electrical connection between the clamping mechanism 6, the timer and the lateral movement mechanism 3, and the clamping mechanism 6 releases the impact After the rod 5, the impact rod 5 falls and hits the sample holder 2 and rebounds upwards. The impact rod 5 crosses the photoelectric reflector, starts the photoelectric reflector, and controls the impact baffle 5 through the lateral movement mechanism 3 and the controller to move to Above the sample holder 2, the second impact of the impact rod 5 on the sample holder 2 is avoided, the problem of inaccurate test data caused by the secondary impact is solved, the automatic control of the impact rod is realized, and the impact performance is improved. The degree of automation of the test device, the test results are more accurate.

The top of the guide tube 4 of the present invention is provided with a snap ring for clipping the cursor locator; the cursor locator also includes a cursor locator, and the cursor locator is connected to the guide tube 4 through the snap ring.

In the present invention, an installation groove 201 for fixing the sample is provided on the top of the sample holder 2, and an impact mark point 202 is arranged on the installation groove 201, and the position of the sample holder 2 is adjusted so that the impact mark point 202 and the impact mark point 202 are designed The cross cursors of the cursor locator coincide to ensure that the impact rod 7 hits the designated position when it falls.

The support 1 of the present invention includes two vertical plates 101 arranged at intervals. The tops of the two vertical plates 101 are connected together by a connecting plate 102. The bottom of each vertical plate 101 is provided with feet 103. piercing holes.

A plurality of reinforcing plates 104 are also arranged between the two vertical plates 101 of the present invention at intervals along the height. Each reinforcing plate 104 is provided with a through hole corresponding to the guide tube 4, and each through hole is coaxial with the through hole. set up.

In the present invention, the gap between the sample holder 2 and the guide tube 4 is further provided with a first slide rail 8 and a second slide rail 9 arranged at intervals, and the two ends of the first slide rail 8 and the second slide rail 9 correspond to The vertical plate 101 is connected; the design of the anti-shock baffle 7 overlapping the first slide rail 8 and the second slide rail 9, the first slide rail 8 and the second slide rail 9 drive the anti-shock baffle 7 to move to the sample Just above the impact marking point 202 on the holder 2 .

In the present invention, the clamping mechanism 6 includes a first air cylinder 601 and a second air cylinder 602 on both sides of the piercing hole. The telescopic rods of the first air cylinder 601 and the second air cylinder 602 are oppositely arranged. The end of the telescopic rod is designed with a first impact rod clamping head 603 and a second impact rod clamping head 604 for clamping the impact rod 5. After adjusting the height of the impact rod 5, the impact rod clamping head clamps the impact rod 5. The impact rod 5 is released to realize the automatic clamping and release of the impact rod 5, which solves the problem of centering the impact rod 5, does not require manual operation, and is automatically controlled and the test is more accurate.

In the present invention, the inner side of the arc of the first impact rod clamping head 603 and the second impact rod clamping head 604 are provided with convex ribs, and the outer wall of the impact rod 5 is provided with convex ribs, so that the impact rod clamping head and the impact rod clamping head are increased. The friction force between the impact rod 5 plays a role of anti-slip, and also reduces the friction force between the impact rod 5 and the inner side of the guide tube 4, and solves the problem that the impact energy becomes small and cannot be caused by the friction between the impact rod 5 and the guide tube 4. Quantitative computing problems.

In the present invention, the impact rod 5 is provided with a marking line, and the bottom of each support foot 103 is provided with an adjustment foot pad 105. The marking line on the impact rod 5 is convenient for the operator to observe and adjust the marking scale corresponding to the impact energy and the guide tube 4. Along the alignment, the adjusting foot pads 105 can adjust the bracket 1 and play a stable supporting role for the bracket 1 .

The present invention also provides a test method based on the impact property testing device of the composite material sheet for aviation as described in any one of the above, comprising the following steps:

Fix the cursor locator on the retaining ring of the guide tube 4, open the cursor locator, and adjust the position of the sample holder 2 so that the impact mark point 202 coincides with the cursor locator; The rod 5 is installed in the guide tube 4, and the height of the impact rod 5 is adjusted up and down; the master control switch is activated, the clamping mechanism 6 is controlled by the controller to release the impact rod 5, and the timer is controlled to start; the impact rod 5 falls to impact the sample clamping When the seat 2 rebounds upwards, the photoelectric reflector sends the detection signal to the controller, and the controller controls the lateral movement mechanism 3 to drive the anti-shock baffle 7 to move to the top of the impact mark point 202 on the sample holder 2, and Controls the timer to stop timing.

As shown in Figure 1, the present embodiment provides a composite material sheet impact performance testing device and a testing method for aviation. The impact performance of the composite material sheet is tested by using the impact rod 5 in free fall to hit the composite material sheet as an example. The steps are as follows:

(1) Take out the impact rod 5 in the guide tube 4, fix the cursor positioner from the snap ring, start the cursor positioner, place the cross positioning cursor on the sample holder 2, adjust the position of the sample holder 2, Make the cross positioning cursor coincide with the impact mark point 202, turn off the cursor locator, remove the cursor locator, and put it aside for use;

(2) Insert the impact rod 5 into the guide tube 4 from the snap ring, and adjust the impact rod 5 so that the marking scale corresponding to the impact energy is aligned with the upper edge of the guide tube 4;

(3) Activate the master control switch, control the clamping mechanism 6 through the controller, make the impact rod clamping head clamp the impact rod 5, release the impact rod 5, the impact rod 5 falls to complete the impact action, and the timer records the impact rod 5 from falling. The time to the first impact impact marker 202;

(4) After the impact rod 5 hits the composite material sheet, it starts to bounce upward. After the rebound passes over the photoelectric reflector, the photoelectric reflector sends a detection signal to the controller, and the controller controls the lateral movement mechanism (3) to drive the anti-shock baffle ( 7) Move to just above the impact mark point (202) on the sample holder (2) to prevent the impact rod 5 from hitting the composite material sheet for the second time;

(5) Take out the impact rod 5, activate the reset button, the lateral movement mechanism 3 returns to the initial position, the timer returns to the initial state, and is ready for the next test.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. an impact performance testing device of a composite material sheet for aviation, is characterized in that: It includes a sample holding seat (2), a lateral movement mechanism (3) and a holding mechanism (6); a guide tube (4) is arranged above the sample holding seat (2), and the guide tube (4) passes through the bracket ( 1) Fixed above the sample holder (2), the guide tube (4) is equipped with an impact rod (5), and the top of the impact rod (5) passes through the guide tube (4) and the clamping mechanism (6) connection, the clamping mechanism (6) is fixed on the bracket (1), and there is a gap between the bottom of the guide tube (4) and the sample clamping seat (2); It also includes an anti-impact baffle (7) located at the gap between the sample holding seat (2) and the guide tube (4), and one end of the anti-impact baffle (7) extends out of the sample holding seat (2) and the lateral movement mechanism (3) connection, the lateral movement mechanism (3) and the sample holder (2) are arranged at intervals and along the length of the sample holder (2); It also includes a master control switch, a timer, a controller and a photoelectric reflector installed on the impact-proof baffle (7); the master control switch, the photoelectric reflector are electrically connected to the controller, the clamping mechanism (6), the timing The device and the lateral movement mechanism (3) are electrically connected. 2. The impact performance testing device of composite material sheet for aviation according to claim 1, characterized in that: the top of the guide tube (4) is provided with a snap ring for the clipping of the cursor locator; The instrument is connected to the guide tube (4) through a snap ring. 3. The impact performance testing device of composite material sheet for aviation according to claim 2, characterized in that: the top of the sample holder (2) is provided with a mounting groove (201) for fixing the sample, and the mounting groove (201) ) is provided with an impact marking point (202). 4. The impact performance testing device of composite material sheet for aviation according to claim 3, characterized in that: the bracket (1) comprises two vertical plates (101) arranged at intervals, and the tops of the two vertical plates (101) pass through the connecting plate (102) are connected in one body, the bottom of each vertical plate (101) is provided with a support foot (103), and the connecting plate (102) is provided with a piercing hole for piercing the guide tube (4). 5. The impact performance testing device of composite material sheet for aviation according to claim 4, characterized in that: a plurality of reinforcing plates (104) are also arranged at intervals along the height between the two vertical plates (101), and each reinforcing plate ( 104) is provided with through holes corresponding to the guide tube (4) for piercing, and each through hole is arranged coaxially with the piercing hole. 6. The impact performance testing device of composite material sheet for aviation according to claim 5, characterized in that: the gap between the sample holder (2) and the guide tube (4) is also provided with first slide rails arranged at intervals (8) and the second slide rail (9), the two ends of the first slide rail (8) and the second slide rail (9) are respectively connected with the corresponding vertical plates (101); the anti-impact baffles (7) are overlapped on the first slide rail (8) and the second slide rail (9). 7. The impact performance testing device of composite material sheet for aviation according to claim 6, characterized in that: the clamping mechanism (6) comprises a first cylinder (601) and a second cylinder (602) respectively provided on both sides of the piercing hole ), the telescopic rods of the first air cylinder (601) and the second air cylinder (602) are arranged opposite to each other, and the ends of the telescopic rods of the first air cylinder (601) and the second air cylinder (602) are provided with a rod for clamping the impact rod (5). A first impact rod clamping head (603) and a second impact rod clamping head (604). 8. The impact performance testing device of composite material sheet for aviation according to claim 7, characterized in that: the inner side of the arc of the first impact rod clamping head (603) and the second impact rod clamping head (604) is provided with There are protruding edges, and the outer wall of the impact rod (5) is provided with protruding edges. 9 . The impact performance testing device of composite material sheet for aviation according to claim 8 , wherein a marking line is provided on the impact rod ( 5 ), and an adjusting foot pad ( 105 ) is provided at the bottom of each leg ( 103 ). 10 . 10. A test method based on the impact property testing device of the composite material sheet for aviation as claimed in any one of claims 3-9, characterized in that: comprising the steps of: S1: Fix the cursor locator on the retaining ring of the guide tube (4), turn on the cursor locator, and adjust the position of the sample holder (2) so that the impact marking point (202) coincides with the cursor locator; S2: Turn off and remove the cursor locator, put the impact rod (5) into the guide tube (4), and adjust the height of the impact rod (5) up and down; S3: Start the master control switch, control the clamping mechanism (6) to release the impact rod (5) through the controller, and control the timer to start; S4: When the impact rod (5) falls and hits the sample holder (2) and then bounces upward, the photoelectric reflector sends a detection signal to the controller, and the controller controls the lateral movement mechanism (3) to drive the anti-shock baffle (7). ) moves to just above the impact mark point (202) on the sample holder (2), and controls the timer to stop timing.

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