CN108507745B - Drop test device and working method thereof - Google Patents
Drop test device and working method thereof Download PDFInfo
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- CN108507745B CN108507745B CN201810300072.6A CN201810300072A CN108507745B CN 108507745 B CN108507745 B CN 108507745B CN 201810300072 A CN201810300072 A CN 201810300072A CN 108507745 B CN108507745 B CN 108507745B
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000009533 lab test Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
A drop test device and a working method thereof. Relates to the field of laboratory test equipment, in particular to a drop test device and a working method thereof. The drop test device and the working method thereof have the advantages of low labor intensity and high test efficiency. The device comprises a frame, a first object frame and a second object frame which are arranged on the frame, and a winch for driving the first object frame and the second object frame to move up and down, wherein the frame comprises a transverse frame and a plurality of upright posts, the first object frame and the second object frame are respectively sleeved on the upright posts and slide up and down along the upright posts, the first object frame and the second object frame are transversely arranged side by side and are not contacted in the moving process, two opposite surfaces of the first object frame and the second object frame are open, and the winch is used for driving the first object frame and the second object frame to be alternately positioned at the bottom of the frame and at the test height. The invention does not need manual work, realizes full automation, improves the testing efficiency and saves the labor cost.
Description
Technical Field
The invention relates to the field of laboratory test equipment, in particular to a drop test device and a working method thereof.
Background
Drop tests are a common test in safety tests that simulate the falling of a product during use to check whether the product is dangerous when dropped or the durability of the use of the impacted product during use. Currently, the common methods for drop testing in most safety laboratories are: the test sample is held by a hand by the test person and placed on the platform at a prescribed height, then the test sample is allowed to fall freely from the height, and then the sample is placed on the platform again and falls again. This method, while simple, requires hundreds or thousands of repeated picks up and places of samples for durability testing requiring repeated tests, and is very labor intensive and inefficient.
Disclosure of Invention
Aiming at the problems, the invention provides a drop test device with low labor intensity and high test efficiency and a working method thereof.
The technical scheme of the invention is as follows:
the drop test device comprises a frame, a first object frame and a second object frame which are arranged on the frame, and a winch for driving the first object frame and the second object frame to move up and down, wherein the frame comprises a transverse frame and a plurality of upright posts, the first object frame and the second object frame are respectively sleeved on the upright posts and slide up and down along the upright posts, the first object frame and the second object frame are transversely arranged side by side and are not contacted in the moving process, two opposite surfaces of the first object frame and the second object frame are open,
the first hoist driving object frame and the second hoist driving object frame are alternately positioned at the bottom of the frame and at the test height.
The two winches are respectively connected with the first object frame and the second object frame by steel wires of the two winches, the steel wires of the two winches connected with the first object frame and the second object frame are vertical to the ground,
the upper portion of the stand column that thing frame one set was established is equipped with proximity switch three, and the lower part is equipped with proximity switch four, the upper portion of the stand column that thing frame two set was established is equipped with proximity switch five, and the lower part is equipped with proximity switch six.
And a first cylinder and a second cylinder for pushing the sample in the frame are respectively arranged at two ends of the bottom surface of the transverse frame.
The ends of the piston rods of the first cylinder and the second cylinder are respectively provided with a first push plate and a second push plate.
The winch, the third proximity switch, the fourth proximity switch, the fifth proximity switch, the sixth proximity switch, the first cylinder and the second cylinder are respectively connected with the controller.
And a proximity switch seven of the air cylinder I and a proximity switch eight of the air cylinder II are respectively arranged right above the proximity surfaces of the cross frame bottom surface, the object frame I and the object frame II, and the proximity switch seven and the proximity switch eight are respectively connected with a controller.
And a first camera and a second camera are respectively arranged right above the bottom surface of the transverse frame, the first object frame and the second object frame, and the first camera and the second camera are respectively connected with the controller.
A method of operating a drop test device comprising the steps of:
1) The first object frame at the initial position is positioned at the lower part, the second object frame is positioned at the upper part, a sample is manually placed in the first object frame, and the controller is started;
2) The controller lifts the object frame upwards to the upper dead point of the object frame I, the object frame I is detected by the proximity switch III, a signal is sent to the controller by the proximity switch III, and the controller controls the winch to stop and brake, and the object frame I stops at the upper dead point;
3) The controller controls the camera to shoot an image of the sample in the first object frame, after delaying for 1-2 seconds, the controller controls the piston rod of the first air cylinder to push the sample to move inwards, when the piston rod moves to a right dead center, the sample is pushed away from the first object frame and falls into the second object frame, meanwhile, the piston rod of the first air cylinder is detected by the proximity switch seven, a signal is sent to the controller by the proximity switch seven, and the controller controls the piston rod to retract to an initial position;
4) The controller controls the winch to lift the second object frame, the first object frame is lowered, when the second object frame reaches the upper dead point, the second object frame is detected by the proximity switch five, a signal is sent to the controller by the proximity switch five, the controller controls the winch to stop and brake, the second object frame is stopped at the upper dead point, meanwhile, when the first object frame reaches the lower dead point, the signal is sent to the controller by the proximity switch four, the controller controls the winch to stop and brake, and the first object frame is stopped at the lower dead point;
5) The controller controls the camera to shoot the image of the sample in the second object frame at the moment, after delaying for 1-2 seconds, the controller controls the piston rod of the second air cylinder to extend to push the sample to move inwards, when the piston rod of the second air cylinder reaches a left dead point, the sample is pushed out of the second object frame and falls into the first object frame, meanwhile, the piston rod of the second air cylinder is detected by the proximity switch eight, a signal is sent to the controller by the proximity switch eight, and the controller controls the piston rod to retract to an initial position;
6) The controller controls the winch to lift the first object frame, the second object frame descends, when the first object frame reaches the upper dead point, the first object frame is detected by the proximity switch III, a signal is sent to the controller by the proximity switch III, the controller controls the winch to stop and brake, the first object frame stops at the upper dead point, meanwhile, the second object frame is detected by the proximity switch VI when the second object frame reaches the lower dead point, a signal is sent to the controller by the proximity switch VI, the controller controls the winch to stop and brake, and the second object frame stops at the lower dead point;
7) Repeating the steps 3-6;
8) And after the sample is damaged, counting the number of photos taken by the initial damage of the sample, and obtaining the times of falling of the sample when the sample is initially damaged.
The beneficial effects of the invention are as follows: the frame is provided with two object frames which are driven by the winch to alternately move up and down, the sample is pushed down from the object frame at a high position to the object frame at a low position, and the sample is counted for one time every time until the sample is damaged, so that the drop-resistant times of the sample are obtained, the sample is not required to be manually placed at the high position from the low position, and the labor force is greatly reduced; when the object frame stops at the upper dead point, the corresponding cylinder extends out to push down the sample in the frame, and manual pushing is not needed; the state of the sample in the object frame positioned at the upper dead point is shot by the camera, and finally, the times of the falling of the sample can be obtained by counting the number of pictures shot just before the sample is damaged during checking, so that the manual count is not needed, the automatic counting is realized, and meanwhile, the counting accuracy is ensured; the controller is used for controlling the actions of all the components, manual work is not needed, full automation is realized, and the labor cost is saved while the testing efficiency is improved.
Drawings
Figure 1 is a schematic view of the structure of a first embodiment of the invention,
figure 2 is a schematic structural view of a second embodiment of the present invention,
FIG. 3 is a right side view of FIG. 2;
in the figure, 11 is a transverse frame, 12 is a vertical column, 2 is a first object frame, 21 is a first proximity switch, 22 is a third proximity switch, 23 is a fourth proximity switch, 3 is a second object frame, 31 is a second proximity switch, 32 is a fifth proximity switch, 33 is a sixth proximity switch, 4 is a winch, 5 is a first cylinder, 51 is a first push plate, 52 is a seventh proximity switch, 6 is a second cylinder, 61 is a second push plate, 62 is a eighth proximity switch, 7 is a first camera, 8 is a second camera, 9 is a controller, and 10 is a sample.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. The orientation herein is based on fig. 1.
As shown in fig. 1-3, the invention comprises a frame, a first object frame 2 and a second object frame 3 which are arranged on the frame, and a hoist 4 for driving the first object frame 2 and the second object frame 3 to move up and down, wherein the frame comprises a transverse frame 11 and a plurality of upright posts 12, the first object frame 2 and the second object frame 3 are respectively sleeved on the upright posts 12 and slide up and down along the upright posts 12, the upright posts 12 play a role of supporting the transverse frame 11 and a role of guiding the first object frame 2 and the second object frame 3, the first object frame 2 and the second object frame 3 are transversely arranged side by side and are not contacted in the moving process (transversely refers to the horizontal direction in fig. 1, so that a sample 10 can fall into the other object frame exactly no matter whether the sample falls from the first object frame), the opposite surfaces of the first object frame 2 and the second object frame 3 are open, the sample 10 is conveniently pushed out from the frames,
the winch 4 drives the first object frame 2 and the second object frame 3 to be alternately positioned at the bottom of the frame and at the test height.
Fig. 1 shows a first embodiment of the present invention, the winch 4 has one, two ends of the steel wire rope on the winch 4 are respectively connected with the first object frame 2 and the second object frame 3, when one object frame is located at the lowest position, the other object frame is located at the test height,
and a pulley I and a pulley II which are used for the steel wire rope to slide are respectively arranged below the winch 4 and right above the object frame I2 and the object frame II 3, so that the acting force of the steel wire rope on the object frame is vertical force, and the abrasion of the inclined acting force on the upright post 12 is avoided.
The upper part of the upright post 12 sleeved with the first object frame 2 is provided with a first proximity switch 21, and the upper part of the upright post sleeved with the second object frame 3 is provided with a second proximity switch 31. The proximity switch controls the start and stop of the hoist 4, for example, after the sample 10 is placed in the first object frame 2 at the lowest position, the hoist 4 is started to rotate clockwise, the first object frame 2 is driven to move upwards, when the sample moves to the upper dead point, the first object frame 2 is detected by the proximity switch 21, the hoist 4 is stopped by the proximity switch 21, the first object frame 2 is stopped at the upper dead point, then the sample 10 is pushed down from the first object frame 2 and falls into the second object frame 3 at the lowest position, then the hoist 4 is started to rotate reversely, the second object frame 3 is driven to move upwards, when the sample moves to the upper dead point, the second object frame 31 is detected by the proximity switch 31, the hoist 4 is stopped by the second object frame 3, then the sample 10 is pushed down from the second object frame 3 and falls into the first object frame 2 at the lowest position, and the sample is reciprocated. Because the length of the steel wire rope is fixed in the embodiment, the upper proximity switches of the first object frame 2 and the second object frame 3 can be arranged on the upright post, the lower proximity switches of the two frames can be arranged, and the upper proximity switch and the lower proximity switch of one of the two frames can be arranged.
Fig. 2-3 show a second embodiment of the invention, the number of the winches 4 is two, the steel wires of the two winches 4 are respectively connected with the first object frame 2 and the second object frame 3, and the steel wires of the two winches 4 connected with the first object frame 2 and the second object frame 3 are vertical to the ground,
the upper portion of the stand column that thing frame one 2 cover was established is equipped with proximity switch three 22, and the lower part is equipped with proximity switch four 2323, the upper portion of the stand column that thing frame two 3 cover was established is equipped with proximity switch five 32, and the lower part is equipped with proximity switch six 33. The winch 4 controlling the movement of the first object frame 2 rotates, the first object frame 2 moves upwards, when the animal frame 2 moves to the upper dead point, the winch 4 is detected by the proximity switch III 22, the proximity switch III 22 stops the winch 4, so that the first object frame 2 stops at the upper dead point, then the sample 10 is pushed down from the first object frame 2 and falls into the second object frame 3 positioned at the lowest position, then the winch 4 controlling the first object frame 2 is started to reversely rotate, the first object frame 2 moves downwards, when the animal frame 2 moves to the lower dead point, the winch 4 is detected by the proximity switch IV 23, and the proximity switch IV 23 stops the winch 4, so that the object frame and the sample stop at the lower dead point; when the first object frame 2 moves downwards, the winch 4 controlling the second object frame 3 to move upwards moves with the second object frame 3, when the winch 4 moves to the upper dead point, the proximity switch five 32 is detected, the winch 4 is stopped by the proximity switch five 32, so that the second object frame 3 is stopped at the upper dead point, then the sample 10 is pushed down from the second object frame 3 and falls into the first object frame 2 positioned at the lowest position, then the winch 4 is reversed, the second object frame 3 moves downwards, and meanwhile the winch 4 of the first object frame 2 moves upwards with the first object frame 2, and the sample reciprocates.
Further, two ends of the bottom surface of the transverse frame 11 are respectively provided with a first cylinder 5 and a second cylinder 6 for pushing the sample 10 in the frame.
The ends of the piston rods of the first cylinder 5 and the second cylinder 6 are respectively provided with a first push plate 51 and a second push plate 61. The force application area is increased, so that the piston rod can be pushed no matter the size of the sample 10.
Further, the invention also comprises a controller 9, and the winch 4 is connected with the controller 9. The first proximity switches 21 to six, the first cylinder 5 and the second cylinder 6 are respectively connected with the controller 9
And a proximity switch seven 52 of the first air cylinder 5 and a proximity switch eight 62 of the second air cylinder 6 are respectively arranged on the bottom surface of the transverse frame 11, the right upper part of the proximity surfaces of the first object frame 2 and the second object frame 3, and the proximity switch seven 52 and the proximity switch eight 62 are respectively connected with the controller 9. When the sample 10 is in the first object frame 2 and the first object frame 2 is positioned at the top dead center, the piston rod of the first air cylinder 5 stretches out to push the sample 10 out of the first object frame 2, and when the piston rod approaches the proximity switch seven 52, the proximity switch seven 52 transmits a signal to the controller 9, and the controller 9 controls the piston rod to retract.
The durability of the sample 10 was determined by counting the number of drops of the sample 10.
The camera I7 and the camera II 8 are respectively arranged right above the bottom surface of the transverse frame 11, the first object frame 2 and the second object frame 3, and the camera I7 and the camera II 8 are respectively connected with the controller 9. When the first object frame 2 is positioned at the top dead center, the controller 9 drives the first camera 7 to take the picture at the moment, and when the second object frame 3 is positioned at the top dead center, the controller 9 drives the second camera 8 to take the picture at the moment. After the test is completed, the tester can obtain the number of drops of the sample 10 just damaged by referring to the photo. In addition, the camera can be arranged to shoot an image each time, the circulation times are marked on the graph, after the product is damaged, the test times of the product can be known only by searching the image, and whether the product is qualified in drop resistance is obtained. Thus, unmanned on duty and automatic circulation can be realized.
The temperature and current detection device (such as a temperature sensor and an ammeter) can also be arranged on the winch 4, when the temperature exceeds the standard or the current is too large, the controller 9 can automatically cut off, stop the operation, give an alarm, and restart after manual investigation.
The working flow of the invention is as follows: 1) The first object frame 2 is positioned at the lower part of the initial position, the second object frame 3 is positioned at the upper part of the initial position, a sample is manually placed in the first object frame 2, and the controller 9 is started;
2) The controller 9 lifts the first object frame 2 upwards to the upper dead point of the first object frame 2, the first object frame 2 is detected by the third proximity switch 22, the third proximity switch 22 sends a signal to the controller 9, and the controller 9 controls the winch to stop and brake, and the first object frame 2 stops at the upper dead point;
3) The controller 9 controls the camera 7 to shoot an image of the sample in the first object frame 2, after delaying for 1-2 seconds, the controller 9 controls the piston rod of the first air cylinder to push the sample to move inwards, when the piston rod moves to a right dead center, the sample is pushed away from the first object frame 2 and falls into the second object frame 3, meanwhile, the piston rod of the first air cylinder is detected by the proximity switch seven, a signal is sent to the controller 9 by the proximity switch seven, and the controller 9 controls the piston rod to retract to an initial position;
4) The winch lifts the second object frame 3, the first object frame 2 is lifted, when the second object frame 3 reaches the upper dead point, the second object frame 3 is detected by the proximity switch five, a signal is sent to the controller 9 by the proximity switch five, the controller 9 controls the winch to stop and brake, the second object frame 3 stops at the upper dead point, meanwhile, when the first object frame 2 reaches the lower dead point, the signal is sent to the controller 9 by the proximity switch four 23, the controller 9 controls the winch to stop and brake, and the first object frame 2 stops at the lower dead point;
5) The controller 9 controls the camera II 8 to shoot the image of the sample in the object frame II 3 at the moment, after delaying for 1-2 seconds, the controller 9 controls the piston rod of the air cylinder II to extend to push the sample to move inwards, when the piston rod of the air cylinder II reaches a left dead point, the sample is pushed out of the object frame II 3 and falls into the object frame I2, meanwhile, the piston rod of the air cylinder II is detected by the proximity switch eight, the proximity switch eight sends a signal to the controller 9, and the controller 9 controls the piston rod to retract to an initial position;
6) The controller 9 controls the winch to lift the first object frame 2, the second object frame 3 is lowered, when the first object frame 2 reaches the top dead center, the first object frame 2 is detected by the third proximity switch 22, the third proximity switch 22 sends a signal to the controller 9, the controller 9 controls the winch to stop and brake, the first object frame 2 stops at the top dead center, meanwhile, when the second object frame 3 reaches the bottom dead center, the second object frame 3 is detected by the sixth proximity switch 33, the sixth proximity switch 33 sends a signal to the controller 9, the controller 9 controls the winch to stop and brake, and the second object frame 3 stops at the bottom dead center;
7) Repeating the steps 2-5;
8) And after the sample is damaged, counting the number of photos taken by the initial damage of the sample, and obtaining the times of falling of the sample when the sample is damaged initially, thereby judging whether the sample 10 is qualified or not. In addition, the number can be marked on the photo when the photo is taken, and the number on the photo damaged originally can be directly checked to obtain the number of times of being broken.
Claims (4)
1. The working method of the drop test device comprises a frame, a first object frame and a second object frame which are arranged on the frame, and a winch for driving the first object frame and the second object frame to move up and down, wherein the frame comprises a transverse frame and a plurality of upright posts, the first object frame and the second object frame are respectively sleeved on the upright posts and slide up and down along the upright posts, the first object frame and the second object frame are transversely arranged side by side and are not contacted in the moving process, two opposite surfaces of the first object frame and the second object frame are open,
the winch drives the first object frame and the second object frame to be alternately positioned at the bottom of the rack and at the test height;
the two winches are respectively connected with the first object frame and the second object frame by steel wires of the two winches, the steel wires of the two winches connected with the first object frame and the second object frame are vertical to the ground,
the upper part of the upright post sleeved with the first object frame is provided with a third proximity switch, the lower part of the upright post sleeved with the second object frame is provided with a fourth proximity switch, the upper part of the upright post sleeved with the second object frame is provided with a fifth proximity switch, and the lower part of the upright post sleeved with the second object frame is provided with a sixth proximity switch;
two ends of the bottom surface of the transverse frame are respectively provided with a first cylinder and a second cylinder for pushing samples in the frame;
the ends of piston rods of the first cylinder and the second cylinder are respectively provided with a first push plate and a second push plate;
a proximity switch seven of the first cylinder and a proximity switch eight of the second cylinder are respectively arranged on the bottom surface of the transverse frame and right above the two opposite proximity surfaces of the first object frame and the second object frame;
a first camera and a second camera are respectively arranged on the bottom surface of the transverse frame and right above the first object frame and the second object frame;
the working method is characterized by comprising the following steps of:
1) The first object frame at the initial position is positioned at the lower part, the second object frame is positioned at the upper part, a sample is manually placed in the first object frame, and the controller is started;
2) The controller controls the winch to lift the object frame upwards to the upper dead point of the object frame I, the object frame I is detected by the proximity switch III, a signal is sent to the controller by the proximity switch III, and the controller controls the winch to stop and brake, and the object frame I stops at the upper dead point;
3) The controller controls the camera to shoot an image of the sample in the first object frame, marks the circulation times on the image, after delaying for 1-2 seconds, controls the piston rod of the first air cylinder to push the sample to move inwards, when the piston rod moves to a right dead center, the sample is pushed away from the first object frame and falls into the second object frame, meanwhile, the piston rod of the first air cylinder is detected by the proximity switch seven, the proximity switch seven sends a signal to the controller, and the controller controls the piston rod to retract to an initial position;
4) The controller controls the winch to lift the second object frame, the first object frame is lowered, when the second object frame reaches the upper dead point, the second object frame is detected by the proximity switch five, a signal is sent to the controller by the proximity switch five, the controller controls the winch to stop and brake, the second object frame is stopped at the upper dead point, meanwhile, when the first object frame reaches the lower dead point, the signal is sent to the controller by the proximity switch four, the controller controls the winch to stop and brake, and the first object frame is stopped at the lower dead point;
5) The controller controls the camera to shoot the image of the sample in the second object frame at the moment, marks the cycle times on the image, after delaying for 1-2 seconds, controls the piston rod of the second cylinder to extend out to push the sample to move inwards, when the piston rod of the second cylinder reaches a left dead point, the sample is pushed out of the second object frame and falls into the first object frame, meanwhile, the piston rod of the second cylinder is detected by the proximity switch eight, the proximity switch eight sends a signal to the controller, and the controller controls the piston rod to retract to the initial position;
6) The controller controls the winch to lift the first object frame, the second object frame descends, when the first object frame reaches the upper dead point, the first object frame is detected by the proximity switch III, a signal is sent to the controller by the proximity switch III, the controller controls the winch to stop and brake, the first object frame stops at the upper dead point, meanwhile, the second object frame is detected by the proximity switch VI when the second object frame reaches the lower dead point, a signal is sent to the controller by the proximity switch VI, the controller controls the winch to stop and brake, and the second object frame stops at the lower dead point;
7) Repeating the steps 3-6;
8) After the sample is damaged, directly checking the number on the photo damaged initially to obtain the number of times of being dropped when the sample is damaged initially.
2. The method of claim 1, further comprising a controller, wherein the hoist, the third proximity switch, the fourth proximity switch, the fifth proximity switch, the sixth proximity switch, the first cylinder and the second cylinder are respectively connected with the controller.
3. The method of claim 1, wherein the proximity switch seven and the proximity switch eight are each connected to a controller.
4. The method of claim 1, wherein the first and second cameras are each coupled to a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300072.6A CN108507745B (en) | 2018-04-04 | 2018-04-04 | Drop test device and working method thereof |
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| CN201810300072.6A CN108507745B (en) | 2018-04-04 | 2018-04-04 | Drop test device and working method thereof |
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| CN108507745A CN108507745A (en) | 2018-09-07 |
| CN108507745B true CN108507745B (en) | 2024-01-19 |
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| CN112985732A (en) * | 2021-02-04 | 2021-06-18 | 深圳市鼎准电子有限公司 | Free drop test machine for earphone battery |
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| CN108507745A (en) | 2018-09-07 |
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