CN215725542U

CN215725542U - Force application mechanism

Info

Publication number: CN215725542U
Application number: CN202121949422.5U
Authority: CN
Inventors: 刘钧天; 宋天成; 刘宇婷; 闫超; 赵远见; 田茶; 吕芳萱
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-01
Anticipated expiration: 2031-08-19

Abstract

The utility model relates to the field of composite materials, in particular to a force application mechanism. The force application mechanism comprises a fixing structure, an adjusting rod assembly and a force application assembly. A securing structure is configured to be secured to the workpiece. One end of the adjusting rod assembly is connected with the fixed structure and can rotate around the connecting position, and the distance between one end of the adjusting rod assembly, which is far away from the fixed structure, and the connecting position is adjustable. A force application assembly is coupled to an end of the adjustment lever assembly remote from the fixed structure, the force application assembly configured to apply pressure to the workpiece. According to the force application mechanism provided by the utility model, one end of the adjusting rod assembly is connected with the fixed structure, the other end of the adjusting rod assembly is connected with the force application assembly, and the relative position and the relative angle of the adjusting rod assembly and the fixed structure are adjusted to achieve the purpose of adjusting the relative position of the force application assembly and a workpiece, so that the force application assembly can apply pressure to the workpiece at different positions, and further, the accurate application of local pressure during the appearance detection of the existing composite material part with a certain curvature is realized.

Description

Force application mechanism

Technical Field

The utility model relates to the field of composite materials, in particular to a force application mechanism.

Background

Because the resin-based carbon fiber composite material has the remarkable advantages of light weight and high strength, the dosage of the resin-based carbon fiber composite material in the industries such as aviation is continuously promoted. At present, when parts with certain curvature such as composite bent plates are molded, due to the fact that certain springback effect exists after the parts are solidified and demoulded, the edges of the parts can tilt and are not completely attached to a tool profile, and the appearance of the composite parts is detected and whether the profile is out of tolerance or not is judged to be difficult to a certain degree.

The related engineering requirements of the parts allow a certain local pressure to be applied at certain intervals at an assembly connection area, and profile detection is carried out to judge whether the profile of the part is out of tolerance or not. The inspection areas are the edges of the profiles, but because the tooling profiles have certain curvatures, it is difficult to actually realize that certain stress is accurately applied along the normal direction of the edge profiles of the parts.

At present, the weight mainly adopting the fixed counterweight is arranged at a force application point, but because the placed profile is not a plane, the pressure along the normal direction of the force application point is not equal to the gravity of the weight, the deviation is very obvious especially when the curvature of the profile of a part is larger, and the mode has no universality aiming at parts with different shapes. In the industry, a force application device is used for pressurizing parts, but the parts have large profile sizes and need to apply pressure to a plurality of positions in a detection area, so that the position of the force application device needs to be adjusted for many times, and the operation is inconvenient.

Accordingly, there is a need for a force applying mechanism that overcomes the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a force application mechanism which can be used for accurately applying local pressure during appearance detection of a composite material part with a certain curvature.

To achieve the purpose, the utility model adopts the following scheme:

a force application mechanism configured to apply pressure to a workpiece, comprising:

a fixed structure configured to be fixed to a workpiece;

one end of the adjusting rod assembly is connected with the fixed structure and can rotate around the connecting position, and the distance between one end of the adjusting rod assembly, which is far away from the fixed structure, and the connecting position is adjustable;

and the force application assembly is connected to one end, far away from the fixing structure, of the adjusting rod assembly and is configured to apply pressure to the workpiece.

As an alternative, the adjusting rod assembly comprises a sliding rod and a screw, the sliding rod is provided with a through groove track, and the screw penetrates through the through groove track and is fixed with the fixing structure.

As an alternative, the adjusting rod assembly further comprises a rotating rod, and the rotating rod is rotatably connected with one end, far away from the fixing structure, of the sliding rod.

Alternatively, the fixing structure comprises:

a connecting member;

the first clamping part is arranged on the connecting piece;

the second clamping part is arranged on the connecting piece, and the first clamping part and the second clamping part can be close to or far away from the connecting piece relatively.

As an alternative, the connecting member is a first screw rod, the second clamping portion is slidably sleeved on the first screw rod, and the fixing structure further comprises a limiting member, wherein the limiting member is in threaded connection with the first screw rod and is located on one side of the second clamping portion, which is away from the first clamping portion.

Alternatively, the opposing surfaces of the first and second clamping portions are each provided with a first resilient pad.

Alternatively, the force application assembly comprises:

the second screw rod is in threaded fit connection with the adjusting rod assembly;

and the pressure plate is connected with the second screw rod.

Alternatively, the pressure plate is detachably connected to the second screw.

Optionally, the force application assembly further comprises a pressure sensor, and the pressure sensor is arranged on the bottom surface of the pressure plate.

Alternatively, the bottom surface of the pressure plate is provided with a second elastic pad.

The utility model has the beneficial effects that:

in the force application mechanism provided by the utility model, one end of the adjusting rod assembly is connected with the fixed structure, and the other end of the adjusting rod assembly is connected with the force application assembly, so that the relative angle between the adjusting rod assembly and the fixed structure is adjusted, the purpose of adjusting the force application direction is achieved, the force application direction is overlapped with the normal direction of the position of a workpiece to be subjected to pressure application, and the accuracy of pressure application is improved; the distance between one end of the adjusting rod assembly, far away from the fixed structure, and the connecting position is adjusted, so that the force application range of the force application mechanism can be adjusted, and pressure can be applied to different positions of the workpiece on the basis that the position of the force application mechanism is not adjusted.

Drawings

Fig. 1 is a schematic structural diagram of a force application mechanism provided by the present invention.

In the figure: 100. a fixed structure; 110. a connecting member; 120. a first clamping portion; 130. a second clamping portion; 140. a limiting member; 200. an adjustment lever assembly; 210. a slide bar; 211. a through groove rail; 220. rotating the rod; 300. a force application assembly; 310. a second screw; 320. a platen; 330. a pressure sensor.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the present invention, the terms of orientation such as "upper", "lower", "left", "right", "inner" and "outer" are used in the case where no description is made on the contrary, and these terms of orientation are used for easy understanding, and thus do not limit the scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The dosage of the resin-based carbon fiber composite material in the aviation industry is gradually increased because the resin-based carbon fiber composite material has the remarkable advantages of light weight and high strength. At present, when parts with certain curvature such as composite bent plates are molded, due to the fact that certain springback effect exists after the parts are solidified and demoulded, the edges of the parts can tilt and are not completely attached to a tool profile, and the appearance of the composite parts is detected and whether the profile is out of tolerance or not is judged to be difficult to a certain degree. The related engineering requirements of the parts allow a certain local pressure to be applied at certain intervals at an assembly connection area, and profile detection is carried out to judge whether the profile of the part is out of tolerance or not. The inspection areas are the edges of the profiles, but because the tooling profiles have certain curvatures, it is difficult to actually realize that certain stress is accurately applied along the normal direction of the edge profiles of the parts.

To address this problem, the present embodiment provides a force applying mechanism that can be secured to a workpiece to apply pressure normal to the profile of the edge of the part. The force application mechanism provided by the present embodiment includes a fixing structure 100, a lever assembly 200, and a force application assembly 300. The securing structure 100 is used to secure the force applying structure to the workpiece. The adjustment lever assembly 200 is coupled at one end to the fixed structure 100 and is rotatable about its coupling position, the distance between the coupling position and the end of the adjustment lever assembly 200 remote from the fixed structure 100 being adjustable. The force application assembly 300 is attached to an end of the adjustment lever assembly 200 remote from the fixed structure 100 and the force application mechanism is used to apply pressure to the workpiece. The fixing structure 100 fixes the force applying mechanism on the workpiece as a whole, and adjusts the distance between one end of the adjusting rod assembly 200 away from the fixing structure 100 and the fixing structure 100, so as to adjust the position of the force applying assembly 300 in the horizontal direction above the surface of the workpiece. The joint of the lever assembly 200 and the fixing structure 100 is rotated to adjust the angle of the force application assembly 300. By adjusting the connecting position of the adjusting rod assembly 200 and the fixing structure 100, the force application assembly 300 can apply pressure on different positions on the surface of the workpiece. By adjusting the angle of the adjustment rod assembly 200, the angle of the force application assembly 300 can be adjusted, and the force application assembly 300 is kept applying pressure in the direction of the normal of the force application point, so that the direction of the applied pressure when the force application assembly 300 abuts against the surface of the workpiece is along the normal of the force application point. After the position and the angle are adjusted, the force application structure applies normal pressure to the molded surface of the tool at a specific position according to the process requirements so as to expand the subsequent molded surface detection work and implement the inspection of the appearance tolerance of the composite material.

In the present embodiment, as shown in fig. 1, specifically, the fixing structure 100 includes a connector 110, a first clamping portion 120, and a second clamping portion 130. The first clamping portion 120 is disposed on the connecting member 110. The second clamping portion 130 is disposed on the connecting member 110. The first clamping portion 120 and the second clamping portion 130 can be close to or far from each other with respect to the connection member 110. The edge of the workpiece is placed between the first clamping part 120 and the second clamping part 130, and the first clamping part 120 and the second clamping part 130 are close to each other until the first clamping part and the second clamping part abut against the workpiece, so that the workpiece is fixed on the workpiece, and the effect of fixing the force application mechanism is achieved. The relative distance between the first clamping part 120 and the second clamping part 130 is adjustable, and workpieces with different thicknesses can be clamped, so that the compatibility of the force application mechanism is improved.

To further improve the fixing effect and the ease of use of the force application mechanism, the connecting member 110 may be a first screw rod. The first clamping portion 120 is fixedly disposed on the first screw. The second clamping portion 130 is slidably sleeved on the first screw. The fixing structure 100 further includes a limiting member 140, wherein the limiting member 140 is in threaded connection with the first screw and is located on a side of the second clamping portion 130 away from the first clamping portion 120. The edge of the workpiece is placed between the first clamping portion 120 and the second clamping portion 130, the second clamping portion 130 is slid, the surfaces of the first clamping portion 120 opposite to the second clamping portion 130 are both abutted to the workpiece, and the limiting member 140 is screwed to complete the fixation. The first screw is sleeved with the second clamping portion 130, and the limiting member 140 is in threaded connection with the first screw, so that the usability of the fixing structure 100 is improved, and the fixing effect of the fixing structure 100 is enhanced. The second clamping portion 130 is slid and fixed by the limiting member 140, so that the relative distance between the first clamping portion 120 and the second clamping portion 130 is adjustable, thereby clamping workpieces with different thicknesses and improving the compatibility of the force application mechanism. Specifically, the limiting member 140 may be a nut.

In order to protect the profile of the tooling from being damaged and ensure the quality of the finished workpiece, in this embodiment, the surfaces of the first clamping portion 120 and the second clamping portion 130 opposite to each other are provided with first elastic pads. The first flexible elastic pad can protect the fixture profile from being damaged by the first clamping part 120 and the second clamping part 130, and the quality of the fixture profile is guaranteed. Meanwhile, the first elastic pad can ensure that the first clamping part 120 and the second clamping part 130 are more attached to the profile of the tool, so that the fixing effect is improved. In particular, the first resilient pad may be a rubber pad. The rubber pad can protect the profile of the tool, and can also increase the friction between the first clamping part 120 and the workpiece and the second clamping part 130, so as to improve the fixing effect. In other embodiments, the first elastic pad may also be a sponge pad or a silicone pad, etc.

In other embodiments, the fixture 100 may be secured to the workpiece in other ways, such as the fixture 100 including a suction cup and a bracket. The support is arranged on a sucker, and the sucker is used for adsorbing and fixing on the surface of a workpiece. The surface of the resin-based carbon fiber composite workpiece is smooth, and the force application mechanism can be adsorbed on the workpiece by utilizing the suction disc to achieve the fixing effect. Meanwhile, the surface of the workpiece is not easily damaged by the sucker, so that the quality of the surface of the workpiece is ensured.

To achieve the distance and angle adjustability between the adjustment lever assembly 200 and the fixed structure 100, the adjustment lever assembly 200 includes, in particular, a slide bar 210 and a screw. The sliding rod 210 is provided with a through groove track 211. Screws can pass through the through-slot tracks 211 on the slide bar 210 to connect the slide bar 210 with the fixed structure 100. When the screw is loosened, the position of the screw on the through-slot track 211 may be adjusted to adjust the relative position of the adjustment lever assembly 200 and the fixed structure 100, and thus the position of the adjustment lever assembly 200 at the end away from the fixed structure 100. When the screw is loosened, the adjustment lever assembly 200 may be rotated to adjust the relative angle of the adjustment lever assembly 200 to the fixed structure 100. When the screw is tightened, the adjustment lever assembly 200 can be fixedly coupled with the fixing structure 100. Through the arrangement, the direct relative position and relative angle between the adjusting rod assembly 200 and the fixed structure 100 can be flexibly adjusted, the measurement range and compatibility of the force application mechanism are improved, and the difference of the sizes of different tool allowance areas is met.

In other embodiments, there are other situations where a distance, angularly adjustable connection between the adjustment rod assembly 200 and the fixed structure 100 may be achieved. Optionally, the adjustment lever comprises a slide bar 210, a hinge, and a first fastener. Specifically, the sliding rod 210 is provided with a guide assembly. The hinge is slidably disposed on the sliding rod 210 through a guide assembly. The sliding rod 210 is rotatably connected to the fixed structure 100 by a hinge. Adjusting the relative position of the hinge and the sliding bar 210 enables adjusting the position of the end of the adjustment lever assembly 200 away from the fixed structure 100. The rotational hinge enables adjustment of the relative angle of the adjustment lever assembly 200 to the fixed structure 100. Locking the first fastener can secure the hinge to the post 210 and limit the hinge rotation. Through the arrangement, the direct relative position and relative angle between the adjusting rod assembly 200 and the fixed structure 100 can be flexibly adjusted and locked, and the measuring range and compatibility of the force application mechanism are improved. The guide assembly can be a guide rail and slide rail assembly, a guide rod and guide sleeve assembly and the like. Alternatively, the first fastener may be a screw.

In this embodiment, the lever assembly 200 further includes a rotating lever 220. The rotating rod 220 is rotatably connected to one end of the sliding rod 210 away from the fixed structure 100, and the other end of the rotating rod 220 is connected to the force application assembly 300. Through the arrangement of the rotating rod 220 and the sliding rod 210, relative rotation is realized, so that the whole adjusting rod assembly 200 has rotational freedom and is not locked when the angle between the force application assembly 300 and the tool profile is adjusted, and the force application assembly 300 can apply pressure in parallel to the tool profile.

It should be noted here that the sliding rod 210 and the rotating rod 220 are connected through a damping rotating shaft, so as to have a function of staying at any angle on the basis of being capable of rotating.

Further, in order to prevent the rotation of the adjustment lever assembly 200 after the application of the pressure by the force application assembly 300, the adjustment lever assembly 200 further includes a second fastener capable of locking the relative rotation between the rotation lever 220 and the slide bar 210. After the relative angle between the rotating rod 220 and the sliding rod 210 is adjusted, the second fastener is locked after the force application assembly 300 is attached to the tool profile, so that the angle between the force application assembly 300 and the tool profile is not changed any more, and the stability of the force application assembly 300 for applying pressure is improved. In particular, the second fastener may be a screw.

In the present embodiment, the force application assembly 300 includes a second screw 310 and a pressure plate 320. The second screw 310 is screw-coupled to the adjustment rod assembly 200, and the pressure plate 320 is coupled to the second screw 310. After the adjustment of the adjustment lever assembly 200, the second screw 310 is rotated to adjust the position of the pressure plate 320 relative to the adjustment lever assembly 200. After the pressure plate 320 contacts the tooling surface, the second screw 310 is tightened to increase the pressure applied by the pressure plate 320 to the tooling surface, and the second screw 310 is loosened to decrease the pressure applied by the pressure plate 320 to the tooling surface.

The surface shapes of different types of workpieces are different, and in order to improve the compatibility of the force application mechanism and ensure that the force application mechanism can be applied to more workpieces, in the embodiment, the pressure plate 320 is detachably connected with the second screw rod 310. Different pressing plates 320 are selected according to different workpieces, so that the laminating effect of the pressing plates 320 and the profile of the tool is guaranteed, and the stability of applied pressure is guaranteed. Specifically, the connection between the pressure plate 320 and the second screw 310 may be a snap connection, a threaded connection, or other detachable connection.

In this embodiment, the force application assembly 300 further includes a pressure sensor 330. The pressure sensor 330 is disposed on the bottom surface of the platen 320 and communicates with an external pressure testing system. The pressure sensor 330 is used to detect the amount of pressure applied to the workpiece by the platen 320. The related engineering requirements of the parts allow a certain local pressure to be applied at certain intervals at an assembly connection area, and profile detection is carried out to judge whether the profile of the part is out of tolerance or not. The pressure sensor 330 transmits the detected pressure value to the pressure testing system. The external pressure test system is used for detecting that the pressure plate 320 is applied to the profile of the tool, ensuring that the pressure of each force application point does not exceed the engineering requirement, and then expanding the profile detection work. The pressure testing system can further comprise a plurality of force application mechanisms, the pressure sensors 330 of the force application mechanisms are transmitted to the pressure testing system, and whether the pressure applied by the force application mechanisms meets the engineering requirements or not is analyzed, so that whether the molded surface detection work is carried out or not is judged. In particular, pressure sensor 330 may be a diaphragm pressure sensor 330. Diaphragm type pressure sensor 330 has frivolous characteristics, sets up and can not harm the frock profile on pressure disk 320, guarantees the quality of frock profile.

In order to further protect the profile of the tool and improve the stability of the applied pressure, in this embodiment, the bottom surface of the platen 320 is provided with a second elastic pad. When the second cushion contacted with the frock profile, can laminate the frock profile more, the pressure energy of applying evenly transmits to the frock profile. Meanwhile, the flexible second elastic pad can protect the molded surface of the tool from being damaged, and the quality of the molded surface of the tool is guaranteed. In particular, the second resilient pad may be a rubber pad. The rubber pad can protect the frock profile, can also increase the frictional force between pressure disk 320 and the frock profile, guarantees that pressure disk 320 applys pressure more stable. In other embodiments, the first elastic pad may also be a sponge pad or a silicone pad, etc.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A force applying mechanism configured to apply pressure to a workpiece, comprising:

a fixed structure (100), the fixed structure (100) being configured to be fixed to the workpiece;

the adjusting rod assembly (200), one end of the adjusting rod assembly (200) is connected with the fixed structure (100) and can rotate around a connecting position, and the distance between one end of the adjusting rod assembly (200) far away from the fixed structure (100) and the connecting position is adjustable;

a force application assembly (300), the force application assembly (300) being connected to an end of the adjustment rod assembly (200) remote from the fixed structure (100), the force application assembly (300) being configured to apply pressure to the workpiece.

2. The force application mechanism of claim 1, wherein the lever assembly (200) comprises a slide bar (210) and a screw, the slide bar (210) being provided with a through slot track (211), the screw passing through the through slot track (211) and being fixed with the fixed structure (100).

3. The force applying mechanism according to claim 2, wherein the lever assembly (200) further comprises a lever (220), the lever (220) being rotatably connected to an end of the slide bar (210) remote from the fixed structure (100).

4. A force applying mechanism according to any one of claims 1-3, characterized in that the securing structure (100) comprises:

a connector (110);

a first clamping portion (120), the first clamping portion (120) being disposed at the connector (110);

the second clamping part (130), the second clamping part (130) set up in connecting piece (110), first clamping part (120) and second clamping part (130) can be close to each other or keep away from each other relatively connecting piece (110).

5. The force application mechanism of claim 4, wherein the connecting member (110) is a first screw, the second clamping portion (130) is slidably sleeved on the first screw, the fixing structure (100) further comprises a limiting member (140), and the limiting member (140) is in threaded connection with the first screw and located on a side of the second clamping portion (130) away from the first clamping portion (120).

6. The force applying mechanism of claim 4 wherein opposing surfaces of the first clamping portion (120) and the second clamping portion (130) are each provided with a first resilient pad.

7. The force applying mechanism of any one of claims 1-3 wherein the force applying assembly (300) comprises:

a second threaded rod (310), the second threaded rod (310) being in threaded fit connection with the adjustment rod assembly (200);

a pressure plate (320), the pressure plate (320) being connected to the second screw (310).

8. The force applying mechanism of claim 7 wherein said pressure plate (320) is removably attached to said second screw (310).

9. The force applying mechanism of claim 7, wherein the force applying assembly (300) further comprises a pressure sensor (330), the pressure sensor (330) being disposed on a bottom surface of the platen (320).

10. The force applying mechanism of claim 8 wherein the platen (320) is provided with a second resilient pad on a bottom surface thereof.