CN216621996U - Welded nut pulling force performance detection device - Google Patents
Welded nut pulling force performance detection device Download PDFInfo
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- CN216621996U CN216621996U CN202122013908.4U CN202122013908U CN216621996U CN 216621996 U CN216621996 U CN 216621996U CN 202122013908 U CN202122013908 U CN 202122013908U CN 216621996 U CN216621996 U CN 216621996U
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Abstract
The utility model relates to a device for detecting the drawing force performance of a welded nut, wherein a product (6) to be detected comprises a bottom plate (61) and a nut (62) welded on the bottom plate (61), and the device comprises: the pressurizing mechanism is used for providing detection power; the force transmission mechanism is used for transmitting the detection power to the nut (62); a support mechanism for supporting the pressurizing mechanism; a product positioning plate (42) for fixing a product to be detected; the pressurizing mechanism is connected with the force transmission mechanism, at least one ejector pin (41) is arranged below the force transmission mechanism, and a through hole with the size larger than that of the nut (62) is formed in the product positioning plate (42); during testing, the product (6) to be tested is placed on the product positioning plate (42), the nut (62) is located in the through hole, and the ejector pin (41) is abutted to the nut (62). Compared with the prior art, the utility model has the advantages of no clamping, controllable load, no obvious test trace and the like.
Description
Technical Field
The utility model relates to the field of detection devices, in particular to a device for detecting the drawing force performance of a welded nut.
Background
Part of parts on the automobile seat are formed by welding a stamped bottom sheet and a nut through a resistance projection welding machine, as shown in figure 2, the performance of the welded product needs to meet certain indexes, particularly the drawing force of the nut, and the welded nut needs to be ensured not to fall off under the condition of strong stretching.
In order to meet the requirement that the welded product can reach the performance index, a device for testing the drawing performance of the product nut is needed, and the safety performance failure of the product caused by the outflow of the products of cold welding and false welding caused by people, machines and materials involved in the welding process is avoided.
Most of the existing drawing performance testing devices need to clamp the nut and then stretch the nut, so that the clamp mark or scratch of the clamp exists on the nut after each test, and the nut is ugly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide the device for detecting the drawing force performance of the welded nut, which does not need clamping, has controllable load and does not have obvious test traces.
The purpose of the utility model can be realized by the following technical scheme:
the designer thinks that according to the reciprocity of force, it is the same to pull the bolt outward from a direction and push the bolt outward from the opposite direction, just so need not the anchor clamps to the nut centre gripping, also can not leave obvious test trace in the part outward appearance, and the concrete scheme is as follows:
a welded nut drawing force performance detection device, a product to be detected comprises a bottom plate and a nut welded on the bottom plate, and the device comprises:
the pressurizing mechanism is used for providing detection power;
the force transmission mechanism is used for transmitting the detection power to the nut;
a support mechanism for supporting the pressurizing mechanism;
the product positioning plate is used for fixing a product to be detected;
the pressurizing mechanism is connected with the force transmission mechanism, at least one thimble is arranged below the force transmission mechanism, and a through hole with the size larger than that of the nut is formed in the product positioning plate;
during testing, the product to be detected is placed on the product positioning plate, the nut is positioned in the through hole, and the ejector pin is abutted to the nut.
During the test, open loading system, exert decurrent pressure, exert pressure on the nut through drive mechanism and thimble, at this moment, the pressure that the nut received is the same with the pulling force direction that draws the test and receive, and only the action point is different, again because set up the through-hole that the size is greater than the nut on the locating plate, in case the nut drops, just can drop in the through-hole, and then knows and wait to detect whether up to standard of product.
Furthermore, the product positioning plate is also provided with at least two guide posts for fixing the descending direction of the force transmission mechanism, and the guide posts penetrate through the force transmission mechanism.
Further, the force transmission mechanism comprises a force transmission upper plate, and the pressurizing mechanism comprises a cylinder; the cylinder is connected with the force transmission upper plate through a telescopic cylinder shaft.
Further, the pressurizing mechanism also comprises a barometer for monitoring the pressure of the cylinder.
Generally speaking, the pressure exerted on the nut by the ejector pin can be judged through the pressure on the air pressure gauge, and then whether the product to be detected reaches the standard or not is checked.
Furthermore, the force transmission mechanism further comprises a thimble fixing plate fixedly connected with the force transmission upper plate, and the thimble is arranged below the thimble fixing plate.
The top of thimble is equipped with protruding cap, and this protruding cap joint is in the thimble fixed plate for the thimble can't be followed from last down droing in the thimble fixed plate, can only follow the top at most and take out.
Furthermore, at least one buffer spring is fixedly arranged at the lower end of the force transmission upper plate, and the other end of the buffer spring is connected with the top of the thimble.
Because the force and the deformation of the spring are in direct proportion, the deformation of the buffer spring can be well controlled only by adjusting the height of the force transmission upper plate and the length of the ejector pin during testing, and the force applied to the nut by the ejector pin can be more accurately determined.
Furthermore, the force transmission upper plate is connected with the thimble fixing plate through a plurality of upright posts. More space is available for the buffer spring.
Furthermore, a sub-claw for dispersing and transmitting the thrust of the cylinder is arranged between the cylinder shaft and the force transmission upper plate.
Furthermore, the supporting mechanism comprises a cylinder fixing plate for bearing the pressurizing mechanism, and side rib plates are further arranged on two sides below the cylinder fixing plate.
Further, the bottom of the device is provided with a base plate for supporting the whole device.
Compared with the prior art, the utility model has the following advantages:
(1) the utility model firstly overcomes the technical prejudice that drawing is necessary for drawing test, adopts a pressurizing mode to achieve almost the same test effect, does not leave obvious test traces, and is an innovative example in the whole industry;
(2) in order to better determine the pressure, the utility model can determine the pressure by using the distance and the length which are better controlled by utilizing the law of the stress and the deformation of the buffer spring, and can also refer by using the indication of a pressure gauge, so that the test result is more reliable.
Drawings
FIG. 1 is a schematic view of a test apparatus in an embodiment;
FIG. 2 is a schematic diagram of a product under test in an embodiment;
the reference numbers in the figures indicate: the device comprises an air cylinder 11, an air cylinder shaft 12, a barometer 13, a branch claw 14, an air cylinder fixing plate 21, a side rib plate 22, a force transmission upper plate 31, an ejector pin fixing plate 32, a buffer spring 33, an ejector pin 41, a product positioning plate 42, a guide post 43, a base plate 5, a product 6 to be detected, a bottom plate 61 and a nut 62.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
Examples
In the embodiment, the welded product performance of the product 6 to be tested must meet the requirements of 60Nm of breaking torque and 8KN of drawing force, and the welded nut does not fall off. The following was examined only for the drawing force performance.
A device for testing the pull-out force performance of a welded nut, as shown in fig. 1-2, wherein a product 6 to be tested comprises a base sheet 61 and a nut 62 welded to the base sheet 61, the device comprising: the pressurizing mechanism is used for providing detection power; a force transmission mechanism for transmitting the detection power to the nut 62; a support mechanism for supporting the pressurizing mechanism; a product positioning plate 42 for fixing a product to be detected; the pressurizing mechanism is connected with the force transmission mechanism, at least one ejector pin 41 is arranged below the force transmission mechanism, and a through hole with the size larger than that of the nut 62 is formed in the product positioning plate 42; the supporting mechanism comprises a cylinder fixing plate 21 for bearing the pressurizing mechanism, and side rib plates 22 are further arranged on two sides below the cylinder fixing plate 21. The bottom of the device is provided with a base plate 5 for supporting the whole device.
During testing, the product 6 to be tested is placed on the product positioning plate 42, the nut 62 is located in the through hole, and the thimble 41 abuts against the nut 62. The product positioning plate 42 is further provided with at least two guide posts 43 for fixing the descending direction of the force transmission mechanism, and the guide posts 43 are arranged in the force transmission mechanism in a penetrating way.
The force transmission mechanism comprises a force transmission upper plate 31, and the pressurizing mechanism comprises a cylinder 11; the cylinder 11 is connected to the force transmission upper plate 31 by means of a telescopic cylinder shaft 12. The pressurizing mechanism further includes a gas pressure gauge 13 that monitors the pressure of the cylinder 11. Generally, the pressure exerted on the nut 62 by the thimble 41 can be judged by the pressure on the barometer 13, so as to check whether the product 6 to be detected is up to standard. And a sub-claw 14 for dispersing and transmitting the thrust of the cylinder 11 is also arranged between the cylinder shaft 12 and the force transmission upper plate 31.
The force transmission mechanism further comprises a thimble fixing plate 32 fixedly connected with the force transmission upper plate 31, and a thimble 41 is arranged below the thimble fixing plate 32. The top end of the thimble 41 is provided with a convex cap which is clamped in the thimble fixing plate 32, so that the thimble 41 cannot fall off from top to bottom in the thimble fixing plate 32 and can only be taken out from the top at most.
At least one buffer spring 33 is fixedly arranged at the lower end of the force transmission upper plate 31, and the other end of the buffer spring 33 is connected with the top of the thimble 41. Since the force and the deformation of the spring are in direct proportion, the deformation of the buffer spring 33 can be well controlled only by adjusting the height of the force transmission upper plate 31 and the length of the ejector pin 41 during testing, so that the force applied by the ejector pin 41 to the nut 62 can be more accurately determined. The force transmission upper plate 31 is connected with the thimble fixing plate 32 through a plurality of upright posts. More space is available for the buffer spring 33.
During the test, open the loading system, apply decurrent pressure, apply pressure on nut 62 through power transmission mechanism and thimble 11, the height of adjusting biography power upper plate 31 and the length of thimble 41 make pressure be 8KN, at this moment, the pressure that nut 62 received is the same with the pulling force direction of drawing the test and receiving, just the action point is different, again because set up the through-hole that the size is greater than nut 62 on the locating plate 42, in case nut 62 drops, just can drop in the through-hole, and then know and wait to detect whether up to standard of product 6.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A device for detecting the drawing force performance of a welded nut is characterized in that a product (6) to be detected comprises a bottom plate (61) and a nut (62) welded on the bottom plate (61), and the device comprises:
the pressurizing mechanism is used for providing detection power;
the force transmission mechanism is used for transmitting the detection power to the nut (62);
a support mechanism for supporting the pressurizing mechanism;
a product positioning plate (42) for fixing a product to be detected;
the pressurizing mechanism is connected with the force transmission mechanism, at least one thimble (41) is arranged below the force transmission mechanism, and a through hole with the size larger than that of the nut (62) is formed in the product positioning plate (42);
during testing, the product (6) to be tested is placed on the product positioning plate (42), the nut (62) is located in the through hole, and the ejector pin (41) is abutted to the nut (62).
2. The device for detecting the drawing force performance of the welded nut according to claim 1, wherein the product positioning plate (42) is further provided with at least two guide posts (43) for fixing the descending direction of the force transmission mechanism, and the guide posts (43) are arranged in the force transmission mechanism in a penetrating manner.
3. The weld nut pulling force performance detection device according to claim 1, wherein the force transmission mechanism comprises a force transmission upper plate (31), and the pressurizing mechanism comprises a cylinder (11); the cylinder (11) is connected with the force transmission upper plate (31) through a telescopic cylinder shaft (12).
4. A weld nut pull force performance detection device according to claim 3, characterized in that the pressurization mechanism further comprises a barometer (13) for monitoring the pressure of the cylinder (11).
5. The device for detecting the drawing force performance of the welded nut according to claim 3, wherein the force transmission mechanism further comprises a thimble fixing plate (32) fixedly connected with the force transmission upper plate (31), and the thimble (41) is arranged below the thimble fixing plate (32).
6. The device for detecting the drawing force performance of the welded nut according to claim 3 or 5, wherein at least one buffer spring (33) is fixedly arranged at the lower end of the force transmission upper plate (31), and the other end of the buffer spring (33) is connected with the top of the ejector pin (41).
7. The device for detecting the drawing force performance of the welded nut according to claim 5, wherein the force transmission upper plate (31) is connected with the thimble fixing plate (32) through a plurality of upright posts.
8. The device for detecting the drawing force performance of the welded nut according to claim 3, wherein a claw (14) for dispersing and transmitting the thrust of the cylinder (11) is further arranged between the cylinder shaft (12) and the force transmission upper plate (31).
9. The device for detecting the drawing force performance of the weld nut according to claim 1, wherein the supporting mechanism comprises a cylinder fixing plate (21) for bearing the pressurizing mechanism, and side ribs (22) are further arranged on two sides below the cylinder fixing plate (21).
10. The weld nut pullout force performance test apparatus according to claim 1, wherein a base plate (5) is provided at the bottom of the apparatus for supporting the entire apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122013908.4U CN216621996U (en) | 2021-08-25 | 2021-08-25 | Welded nut pulling force performance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122013908.4U CN216621996U (en) | 2021-08-25 | 2021-08-25 | Welded nut pulling force performance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216621996U true CN216621996U (en) | 2022-05-27 |
Family
ID=81682205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122013908.4U Active CN216621996U (en) | 2021-08-25 | 2021-08-25 | Welded nut pulling force performance detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216621996U (en) |
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2021
- 2021-08-25 CN CN202122013908.4U patent/CN216621996U/en active Active
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