CN113607368A - Falling ball testing device and method - Google Patents
Falling ball testing device and method Download PDFInfo
- Publication number
- CN113607368A CN113607368A CN202110924773.9A CN202110924773A CN113607368A CN 113607368 A CN113607368 A CN 113607368A CN 202110924773 A CN202110924773 A CN 202110924773A CN 113607368 A CN113607368 A CN 113607368A
- Authority
- CN
- China
- Prior art keywords
- ball
- test
- falling
- tray
- test ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a falling ball testing device and a testing method, wherein the testing device comprises a clamping jaw (2) capable of grabbing or loosening a testing ball (1), a falling-back prevention mechanism (4) for preventing the testing ball from rebounding after being impacted is arranged on a falling path of the testing ball, and the falling-back prevention mechanism can support the testing ball when the testing ball bounces after being impacted so as to prevent the testing ball from impacting an object to be tested for the second time. The falling ball testing device provided by the invention can prevent the test ball from impacting the object to be tested for the second time by supporting the rebounded test ball through the ascending tray, so that the testing accuracy is ensured.
Description
Technical Field
The invention belongs to the technical field of automation equipment, and particularly relates to a falling ball testing device and a falling ball testing method.
Background
The ball drop test is also called as a drop test, and is a test method for freely dropping a test ball with specified weight on a product from a specified drop height to impact the product so as to check the performance of the product in all aspects, the method is generally used for testing products such as plastic, glass and the like, and particularly, the impact resistance test of a mobile phone screen is also crucial when a large-screen smart phone is very popular;
falling ball test machine among the prior art all adopts artifical material loading, the mode of artifical height-adjusting, and test rate is not high, and current test in addition, for preventing test ball resilience secondary and assault, all tie the test ball with a rope, prevent through the artifical mode that pulls that test ball kick-backs, error easily and efficiency of software testing are low.
Disclosure of Invention
The invention mainly solves the technical problem of providing a falling ball testing device, which prevents a testing ball from impacting an object to be tested for the second time through an automatic device and ensures the testing accuracy.
In order to solve the above technical problems, one technical solution adopted by the present invention is as follows:
a falling ball testing device comprises a clamping jaw capable of grabbing or releasing a test ball, wherein a falling path of the test ball is provided with an anti-falling mechanism for preventing the test ball from rebounding after being impacted;
the anti-falling mechanism comprises a tray capable of moving along a Z axis, the tray is located above the object to be tested, the tray is provided with a penetrating opening, and the lower end of the test ball can penetrate through the penetrating opening to impact the object to be tested when falling.
Further, the clamping jaw and the tray are mounted on the marble base (22) through a linear sliding rail, reciprocating motion along the Z-axis direction is formed through the linear sliding rail, and the tray is located below the clamping jaw.
Furthermore, a cushion block is arranged at the opening of the penetrating port, and the contact part of the cushion block and the test ball is an arc surface matched with the test ball.
Further, when the falling test ball impacts the object to be tested, the distance between the test ball and the penetrating opening is 1.5-3 mm.
Furthermore, when the falling test ball impacts the object to be tested, the distance between the test ball and the penetrating opening is 2 mm.
Furthermore, a sensor for detecting the position of the test ball is also arranged;
the sensor comprises a first sensor (42) located at the position of the clamping jaw;
alternatively, the sensors include the first sensor (42) and a second sensor located at the tray location.
The present invention also provides a falling ball testing method using the falling ball testing device according to any one of claims 1 to 6, wherein when the test ball rebounds after falling and hitting the object to be tested, the tray is raised to hold the test ball, thereby preventing the test ball from making a secondary impact on the object to be tested.
Further, the position of the clamping jaw is provided with a first sensor, and the falling starting time of the test ball is acquired through the first sensor.
Further, the rising start time of the tray is obtained by calculating the falling time of the test ball, and the calculation formula of the time required for the test ball to fall and impact the object to be tested is as follows:
wherein H is the falling height of the test ball, and g is 9.8m/s2。
Further, the rising distance of the tray is less than or equal to the rebound height of the test ball.
The invention has the beneficial effects that:
this testing arrangement can carry out automatic test through preventing falling back the mechanism to still be equipped with the mechanism of preventing kick-backing of preventing that prevents the secondary kick-backing, ball test (drop test) falls in the carrying on that can be accurate quick.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the overall structure of the ball drop test apparatus of the present invention;
FIG. 2 is a schematic structural view of a clamping jaw and an anti-falling mechanism in the falling ball testing device of the present invention;
FIG. 3 is a schematic view of the anti-backup mechanism of the present invention;
FIG. 4 is a schematic view of the test bead clamping and dropping of the present invention;
FIG. 5 is a schematic view of the present invention showing a test pellet impacting an object under test;
FIG. 6 is a schematic view of the anti-falling mechanism of the present invention holding the test pellet after it rebounds upon impact;
the parts in the drawings are marked as follows:
the test ball 1;
the clamping jaw 2, the linear slide rail 21, the marble base 22, the screw rod assembly 23 and the U-shaped linear motor 24;
an anti-falling mechanism 4 and a detection camera 5;
and an analyte 9.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Example (b):
a ball drop test apparatus, as shown in fig. 1: including the clamping jaw 2 that can snatch or loosen test ball 1, Z axle direction reciprocating motion can be followed to the clamping jaw to adjust the height of falling the ball, be equipped with on the route of test ball whereabouts and be used for preventing rebound prevents falling mechanism 4 behind the test ball striking, prevent falling mechanism can hold when bounceing after the test ball striking the test ball to prevent its secondary striking determinand.
As shown in fig. 1 and 2: a carrying platform 3 for clamping an object to be tested 9 is positioned below the test ball, the carrying platform and/or the clamping jaw can move along the X-axis and/or the Y-axis direction, and the anti-falling mechanism is positioned between the object to be tested and the clamping jaw;
in this embodiment, the movement of the X-axis is achieved by the movement of the clamping jaw, and the movement of the Y-axis is achieved by the movement of the stage;
in more detail, the linear motion of the X-axis and the Y-axis is realized by the linear guide rail, and each of the linear guide rail and the driving member is separately provided to drive the linear guide rail to move.
As shown in fig. 2 and 3: the anti-falling mechanism comprises a tray 41 which can move along the Z axis, the tray is positioned above the object to be tested and is provided with a through opening 411, and the lower end of the test ball can penetrate through the through opening to impact the object to be tested when the test ball falls down; in this embodiment, the tray is composed of two support plates 412, and both of the support plates have circular arc openings.
In addition, the oral area of wearing the mouth still is equipped with the cushion, just the cushion with the position that the test ball contacted be with the cambered surface that test ball phase-match, in this embodiment, the cushion is the PU material, and its hardness is 50, and non-metallic material can reduce the wearing and tearing to the test ball, also can prevent the damage that causes in the time of both unusual striking to higher hardness and rigidity have simultaneously.
This embodiment is in order to guarantee the precision of ball whereabouts position, the clamping jaw and the tray all installs in marble base 22 through linear slide rail 21, marble base can provide better rigidity, and both constitute along the reciprocating motion of Z axle direction through same group linear slide rail, have better position precision, the tray is located the below of clamping jaw, both all are equipped with independent driving piece, the clamping jaw passes through the drive of lead screw subassembly 23, the tray passes through the drive of U type linear electric motor 24.
This device still is equipped with the detection the sensor of test ball position detects the position that the test was asked through the sensor to control the motion of each part, the sensor has two kinds of setting modes:
1. the sensors include a first sensor 42 at the jaw position and a second sensor at the pallet position;
2. the sensors include a first sensor 42 located at the position of the jaws;
the first mode is well understood, the falling of the test ball is detected through the first sensor, the test ball entering the falling point is detected through the second sensor, then the anti-falling mechanism acts to support the test ball rebounded after impact, and secondary impact is prevented from being formed;
in this embodiment, it is preferable to adopt the second prevention that the time of falling of the test ball, that is, the time of leaving the clamping jaw is monitored only by the first sensor, and the time of impact is obtained by calculation, in this embodiment, the first sensor is a correlation type photoelectric sensor, which senses the test ball through a through hole 25 provided in the clamping jaw;
the calculation formula of the time required for the test ball to fall is as follows:
wherein H is the falling height, and g is 9.8m/s2；
Setting the test height to be 10cm, and obtaining the time from the falling to the impact of the test ball to be 0.14s according to the formula;
this device still is equipped with detection camera 5 as shown in fig. 1, detection camera can adjust the position alignment of its camera lens the determinand to obtain the striking state of determinand, more specifically, if the striking does not have broken continuous test, if some striking breakage, stop the test.
In addition, a high-speed camera (not shown) is further arranged, the lens of the high-speed camera is over against the object to be tested so as to record the impact process, and the high-speed camera is adopted, so that the broken state during testing can be recorded for retrospective analysis.
The specific testing steps of the device are shown in fig. 4 to 6:
as shown in fig. 4: firstly, a test ball 1 (an acrylic ball is adopted in the embodiment, and the weight is 158g) is arranged in a clamping jaw 2, at the moment, the clamping jaw moves to the height of 10cm along the Z axis (namely, the distance between the test ball and an object to be tested is 10cm), an object to be tested 9 (the object to be tested is a mobile phone glass panel in the embodiment) is arranged in a carrying platform 3, and the X axis position of the clamping jaw and the Y axis position of the carrying platform are adjusted through setting so that the test ball can fall to a manufacturing fixed point;
at this time, the tray is located at a position close to the object to be measured, as shown in fig. 5: the positions are: when the falling test ball impacts the object to be tested, the distance L between the test ball and the penetrating opening is 1.5-3mm, and in the embodiment, the distance L is 2 mm;
as shown in fig. 5 to 6: the clamping jaw is loosened, the test ball falls down to impact an object to be tested, and the test ball and the tray have a gap during impact, so that the tray does not influence the impact;
the falling initial time is detected by the first sensor, the falling-to-impact time of the test ball can be calculated to be 0.14s according to the formula, the tray rises after impact, the falling ball rises due to rebounding, and when the falling ball falls again after rising to the highest point for the second time, the falling ball can be held by the tray (the distance L when the test ball is held is 0), so that the function of preventing secondary impact is realized.
It should be verified that the time for the second rising + second falling of the test ball is actually very short, so we have used only one sensor to control the movement of the device by calculation, and if two sensors are used, a sensor and a driving unit with higher precision and higher sensitivity are needed.
The test shows that the rebound height of the test ball is 1cm when the test ball is impacted by 10cm, and the secondary falling time of the test ball can be calculated to be 0.045s by adopting the formula;
in the device, the time of the tray which is driven by the linear motor to move upwards for 1cm is 0.06s, and the time of rebound rising plus secondary falling after the test ball is impacted can be approximately determined as 0.045 x2 to 0.09s, namely 0.6 to 0.9, so that the rebound prevention device of the device can be completely implemented in theory; and the device can be implemented through actual tests.
After the test ball is impacted, the state of the object to be tested is obtained through the detection camera 5, if the object to be tested is crushed, the test is stopped, if the object to be tested is not crushed, the tray moves upwards (the Z axis moves upwards), the test ball is sent into the clamping jaw 2, and the ball drop test is repeated;
it should be noted here that the height of the test ball in the ball drop test is not fixed, and the above embodiment exemplifies a height of 10cm, and in the actual test, the height is increased from the height X1 (for example, 10cm) to the height X2 (for example, 50cm), and the calculation formula after the height is changed is the same.
In addition, the test ball hits the bounce with a certain time interval, i.e. the hit has a duration which is very short and which is 0.015s for several tests, plus this time, the tray will rise more than enough to hold the test ball.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship described based on the embodiments and shown in the drawings, or the orientation or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A falling ball testing device is characterized in that: the test ball falling device comprises a clamping jaw (2) capable of grabbing or loosening a test ball (1), wherein a falling-back prevention mechanism (4) used for preventing the test ball from rebounding after being impacted is arranged on a falling path of the test ball;
the anti-falling mechanism comprises a tray (41) capable of moving along the Z axis, the tray is located above the object to be tested, the tray is provided with a penetrating opening (411), and the lower end of the test ball can penetrate through the penetrating opening to impact the object to be tested when falling down.
2. The ball drop test device of claim 1, wherein: the clamping jaw and the tray are all installed in marble base (22) through linear slide rail (21), through linear slide rail constitutes the reciprocating motion along the Z axle direction, the tray is located the below of clamping jaw.
3. The ball drop test device of claim 1, wherein: the mouth part of the through opening is provided with a cushion block, and the contact part of the cushion block and the test ball is an arc surface matched with the test ball.
4. The ball drop test device of claim 1, wherein: and when the falling test ball impacts the object to be tested, the distance (L) between the test ball and the penetrating opening is 1.5-3 mm.
5. The ball drop test device of claim 4, wherein: and when the falling test ball impacts the object to be tested, the distance (L) between the test ball and the penetrating opening is 2 mm.
6. The ball drop test device of claim 1, wherein: a sensor for detecting the position of the test ball is also arranged;
the sensor comprises a first sensor (42) located at the position of the clamping jaw;
alternatively, the sensors include the first sensor (42) and a second sensor located at the tray location.
7. A falling ball test method is characterized in that: the ball drop test device according to any one of claims 1 to 6, wherein when the test ball rebounds after falling and impacting the object to be tested, the tray is lifted to support the test ball, thereby preventing the test ball from making a secondary impact on the object to be tested.
8. The ball drop test method of claim 7, wherein: the position of the clamping jaw is provided with a first sensor (42), and the falling starting time of the test ball is obtained through the first sensor.
9. The ball drop test method of claim 7 or 8, wherein: the rising starting time of the tray is obtained by calculating the falling duration time of the test ball, and the calculation formula of the time required for the test ball to fall and impact the object to be tested is as follows:
wherein H is the falling height of the test ball, and g is 9.8m/s2。
10. The ball drop test method of claim 7, wherein: the rising distance of the tray is less than or equal to the rebound height of the test ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924773.9A CN113607368A (en) | 2021-08-12 | 2021-08-12 | Falling ball testing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924773.9A CN113607368A (en) | 2021-08-12 | 2021-08-12 | Falling ball testing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113607368A true CN113607368A (en) | 2021-11-05 |
Family
ID=78340520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110924773.9A Pending CN113607368A (en) | 2021-08-12 | 2021-08-12 | Falling ball testing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113607368A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608780A (en) * | 2022-02-11 | 2022-06-10 | 联宝(合肥)电子科技有限公司 | Falling ball testing device |
| CN116202900A (en) * | 2023-03-27 | 2023-06-02 | 常州涛惠文化传媒有限公司 | Detection instrument and detection method for detecting hardness of valve based on rebound parameters after impact |
-
2021
- 2021-08-12 CN CN202110924773.9A patent/CN113607368A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608780A (en) * | 2022-02-11 | 2022-06-10 | 联宝(合肥)电子科技有限公司 | Falling ball testing device |
| CN116202900A (en) * | 2023-03-27 | 2023-06-02 | 常州涛惠文化传媒有限公司 | Detection instrument and detection method for detecting hardness of valve based on rebound parameters after impact |
| CN116202900B (en) * | 2023-03-27 | 2024-03-12 | 苏州旭博检测服务有限公司 | Detection instrument and detection method for detecting hardness of valve based on rebound parameters after impact |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113607368A (en) | Falling ball testing device and method | |
| KR101434216B1 (en) | Plate-form Sample Side Impact Test Apparatus having Multi-Impact Prevent Function | |
| CN216386639U (en) | Falling ball intercepting device and falling ball impact testing machine | |
| CN215640023U (en) | Falling ball testing device | |
| CN107389442B (en) | Clamping type secondary impact prevention device and impact testing machine | |
| CN215893950U (en) | Drop test equipment | |
| CN207095977U (en) | The clipping anti-secondary pulse device and shock machine of display screen test | |
| CN110530741A (en) | It is a kind of can mass simultaneous test full-automatic drop hammer impact testing machine | |
| CN116202900B (en) | Detection instrument and detection method for detecting hardness of valve based on rebound parameters after impact | |
| KR20040093760A (en) | Impact tester use in a shock absorber | |
| CN211235328U (en) | Full-automatic drop hammer impact testing machine capable of simultaneously testing in batches | |
| CN214516110U (en) | Full-automatic roughness measurement machine | |
| CN211856211U (en) | Device capable of enabling impact device in hardness tester to perform efficient and accurate impact | |
| CN206348064U (en) | A kind of amplitude detection mechanism | |
| CN100485354C (en) | Object microfall besting method and apparatus | |
| CN113102285B (en) | Full-automatic roughness measurement machine | |
| CN209182176U (en) | A kind of protective device and impact device of impact device load transducer | |
| CN208125056U (en) | A kind of sphere rebound high measure device | |
| JP2000193575A (en) | Impact load tester | |
| CN215004778U (en) | Hammer is hit with gravity to car glass strength detection | |
| CN219161890U (en) | Horizontal impact testing device | |
| CN117705559B (en) | New material-based toughness detection equipment and method | |
| CN219799079U (en) | Storage battery impact detection tool | |
| CN214408496U (en) | Portable annular material impact testing machine | |
| CN216966913U (en) | Gear mounting device of motor output shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |