An upper riveting die tensioning unit

Abstract

The present invention belongs to the technical field of riveting processing devices, and provides an upper riveting die tightening unit. An upper riveting die tightening unit includes an upper riveting die body and a tightening unit frame. The upper riveting die body is provided at the center of the tightening unit frame. The upper riveting die tightening unit includes an upper riveting die positioning mechanism. The upper riveting die positioning mechanism surrounds the upper riveting die body. The upper riveting die positioning mechanism includes a first movable member. The first movable member can be partially embedded in the upper riveting die body. When the first movable member is embedded in the upper riveting die body, the upper riveting die body is fixed relative to the tightening unit frame. Through the above settings, it is ensured that the positioning force of the upper riveting die body by the upper riveting die positioning mechanism is uniform, avoiding the skew of the upper riveting die body during the feeding process, resulting in uneven heights of the rivet heads; the first movable member is embedded in the recess of the upper riveting die body by the action of gravity, automatically controlling the position of the upper riveting die body, reducing the working intensity of the operator while ensuring the position accuracy of the upper riveting die body.

Description

Technical Field

[0001] The present invention relates to the technical field of riveting processing devices, and provides an upper riveting die tensioning unit. Background Art

[0002] In order to ensure the assembly quality of aircraft panels, connection methods such as blind rivets, Hi-Lok bolts, and crowned head rivets are widely used in the assembly of large aircraft. There are more than 200,000 rivets on a single large aircraft, and the riveting work has become one of the main tasks in aircraft assembly work, and its riveting quality and efficiency affect the quality and efficiency of the entire aircraft assembly. Automatic drilling and riveting equipment has good riveting quality and relatively high efficiency, but it is specific and needs to be used in conjunction with special tooling, mainly for the riveting work of panel assembly. The prior art CN110014113A provides a rapid and precise riveting device, including a bracket, an upper riveting die, a lower riveting die, a connection mechanism, a bed body, a driving mechanism, a control system, a pressure sensor, and a grating scale. The product is placed on the bracket, and the bracket is located between the upper and lower riveting dies. The upper and lower riveting dies are respectively fixed above and below the bed body through the connection mechanism. The control system and the driving mechanism drive the upper and lower riveting dies to move up and down for riveting. The pressure sensor and the grating scale are installed on the connection mechanism for fixing the lower riveting die and are connected to the control mechanism and the driving system to real-time feedback the position of the lower riveting die and the magnitude of the riveting force between the upper and lower riveting dies, thereby controlling the height of the rivet head and achieving precise riveting. The inventor believes that there is room for improvement in the prior art. Summary of the Invention

[0003] The purpose of the present invention is to accurately position the upper riveting die body in the upper riveting die tensioning unit, control the installation accuracy of the upper riveting die, and protect the processed product and the upper riveting die body from quality problems due to the position error of the upper riveting die body during the processing. Secondly, the feeding and retracting positions of the upper riveting die body are detected to avoid errors in the movement of the upper riveting die body during the processing, resulting in processing quality problems and collisions of the upper riveting die body. To this end, the present invention provides an upper riveting die tensioning unit, including an upper riveting die body and a tensioning unit frame. The center of the tensioning unit frame is provided with the upper riveting die body. The upper riveting die tensioning unit includes an upper riveting die positioning mechanism. The upper riveting die positioning mechanism surrounds the upper riveting die body. The upper riveting die positioning mechanism includes a first movable part. The first movable part can partially embed into the upper riveting die body. When the first movable part embeds into the upper riveting die body, the upper riveting die body is fixed relative to the tensioning unit frame. The upper riveting die tensioning unit includes a plurality of upper riveting die positioning mechanisms that circumferentially surround the upper riveting die body to ensure that the positioning acting force of the upper riveting die body by the upper riveting die positioning mechanism is uniform, and avoid skewing of the upper riveting die body during the feeding process, resulting in uneven heights of the rivet heads; further, the first movable part naturally embeds into the recess of the upper riveting die body by the action of gravity. The first movable part controls the positions of the upper riveting die tensioning unit and the upper riveting die positioning mechanism, reducing the working intensity of the operator while ensuring the position accuracy of the upper riveting die body.

[0004] Preferably, one end of the upper riveting die body close to the tensioning unit frame is the body fixed end. A first bushing is provided on the outer wall of the body fixed end. The upper riveting die positioning mechanism is located inside the first bushing. The upper riveting die positioning mechanism includes a movable part air duct. One end of the movable part air duct communicates with the outer wall of the first bushing, and the other end of the movable part air duct communicates with the upper riveting die body. A first movable part is located inside the movable part air duct, and the outer shape of the first movable part matches the cross-section of the movable part air duct. The movable part air duct is used to inflate the chamber where the first movable part in the upper riveting die positioning mechanism is located, pressing the first movable part against the upper riveting die body to ensure the stable connection between the upper riveting die body and the upper riveting die positioning mechanism; the first bushing is used to cover the body fixed end of the upper riveting die body, adjusting the cross-sectional area at the upper end of the upper riveting die body, which is beneficial to the tensioning unit frame transmitting the riveting force to the upper riveting die during the riveting process, avoiding the cross-sectional area of the body fixed end being smaller than the cross-sectional area of the contact section between the upper riveting die body and the processed product, resulting in the body fixed end breaking due to stress, and at the same time reducing the material used to make the upper riveting die body and avoiding material waste.

[0005] Preferably, the upper riveting die tensioning unit further includes a second bushing. The second bushing is located on the outer wall of the first bushing. A second movable part is provided on the outer wall of the first bushing, and the second movable part can move relative to the second bushing. The second bushing and the first bushing replace the friction between the upper riveting die body and the tensioning unit frame during the feeding and retracting processes of the upper riveting die body, reducing the wear of the upper riveting die body and the tensioning unit frame and extending the service life; and, a second movable part is provided on the outer wall of the first bushing. The second movable part is relatively fixed to the upper riveting die body. The movement displacement of the second movable part relative to the second bushing can indicate the feeding and retracting amounts of the upper riveting die body.

[0006] Preferably, the second bushing is provided with a first groove body. The second movable part is located inside the first groove body. Proximity switches are provided on both sides of the first groove body of the second bushing. The proximity switches can move relative to the first groove body. The movement directions of the proximity switches and the movement direction of the second movable part are on the same straight line. A first elastic body is provided at the top of the first bushing and connected to the tensioning unit frame. The first groove body is opened to accommodate the second movable part. Using the second groove body can more intuitively indicate the movement displacement of the upper riveting die body relative to the second bushing, that is, the feeding amount of the upper riveting die body relative to the tensioning unit frame; further, proximity switches are provided on both sides of the second groove body. When the second movable part approaches the proximity switches, signals will be emitted, replacing the operator to control and observe the displacement of the second movable part in the first groove body, improving the feeding accuracy of the upper riveting die body and reducing the workload of the operator.

[0007] Preferably, a switch adjustment block is provided at one end of the first tank body away from the tensioning unit frame. The switch adjustment block can adjust the positions of the proximity switches relative to the first tank body respectively. The proximity switches include a first proximity switch and a second proximity switch. The first proximity switch is close to the upper end of the first tank body, and the second proximity switch is close to the lower end of the first tank body. Using the switch adjustment block to adjust the positions of the proximity switches and changing the positions where the second moving part approaches the proximity switches to emit signals enables the proximity switches to be applicable to the displacements of different second moving parts. Under different feeding amounts of the upper riveting die body, the proximity switches can emit signals, improving the versatility of the proximity switches and the automation degree of the upper riveting die tensioning unit.

[0008] Preferably, a second tank body is provided on the outer side of the second bushing. The bottom of the second tank body is the outer wall of the first bushing, and the second tank body is connected to the moving part air passage. The moving part air passage is located at the bottom of the second tank body, which is beneficial for an external pipeline to pass through the second tank body and be connected to the moving part air passage, avoiding interference between the external pipeline and the second bushing during the movement of the upper riveting die body and shortening the distance for the external pipeline to be connected to the moving part air passage.

[0009] Preferably, the moving part air passage includes a first air passage. The extending direction of the first air passage is the same as that of the upper riveting die body. A first piston rod is provided inside the first air passage, and there is a variable gap between the first piston rod and the first air passage. The first moving part is matched with the gap. Through the above settings, it is beneficial for the gap between the first piston rod and the first air passage to accommodate the first moving part. After the first air passage exhausts air, the first moving part ends the state of closely adhering to the upper riveting die body, and the first moving part moves to the gap between the first piston rod and the first air passage due to its own gravity, enabling the upper riveting die body to move relative to the first bushing, improving the disassembly speed of the upper riveting die body and facilitating the operator to disassemble and replace the upper riveting die body.

[0010] Preferably, a second elastic body is provided at the end of the first piston rod. The second elastic body can automatically adjust the relative height between the first piston rod and the upper riveting die body, enabling the first moving part to switch between the two states of closely adhering to and being away from the upper riveting die body by its own gravity, facilitating the operator to quickly fix and disassemble the upper riveting die body and reducing the workload of the operator.

[0011] The present invention provides an upper riveting die tightening unit, which accurately positions the upper riveting die body in the upper riveting die tightening unit, controls the installation accuracy of the upper riveting die, and protects the processed product and the upper riveting die body from quality problems caused by the position error of the upper riveting die body during the processing; detects the feeding and retracting positions of the upper riveting die body to avoid errors in the movement of the upper riveting die body during the processing, resulting in processing quality problems and collisions of the upper riveting die body, and has the following beneficial effects. The upper riveting die tightening unit includes a plurality of upper riveting die positioning mechanisms that surround the upper riveting die body circumferentially, ensuring that the positioning force of the upper riveting die body received by the upper riveting die positioning mechanisms is uniform, and avoiding skew of the upper riveting die body during the feeding process, resulting in uneven heights of the rivet heads; can send signals according to the feeding and retracting amounts of the upper riveting die body to assist the operator in judging or automatically judging the displacement of the upper riveting die body, avoiding errors in the movement of the upper riveting die body during the processing, resulting in processing quality problems and collisions of the upper riveting die body; the first moving part switches between two states of being in close contact with and away from the upper riveting die body by its own gravity, facilitating the operator to quickly fix and disassemble the upper riveting die body and reducing the working intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of the upper riveting die tightening unit of the present invention;

[0014] Figure 2 is a schematic top view structural diagram of the upper riveting die tightening unit of the present invention;

[0015] Figure 3 is a schematic cross-sectional structural diagram of the moving part air passage of the present invention;

[0016] Figure 4 is a partial enlarged view at the first moving part of the present invention;

[0017] Figure 5 is a schematic structural diagram at the proximity switch of the present invention;

[0018] Figure 6 is a partial enlarged view at the proximity switch of the present invention;

[0019] Figure 7 is a schematic cross-sectional structural diagram of the proximity switch of the present invention.

[0020] Description of the reference numerals: 1 Tightening unit frame; 2 First elastic body; 3 First bushing; 4 Second bushing; 5 Movable part air duct; 6 Upper riveting die positioning mechanism; 61 First piston rod; 62 First movable part; 63 Second elastic body; 7 Upper riveting die body; 8 Proximity switch; 81 First proximity switch; 82 Second proximity switch; 9 Switch adjusting block; 10 Second movable part. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Embodiment 1

[0023] In conjunction with Figure 1 、 Figure 2 and Figure 4 shown, an upper riveting die tightening unit includes an upper riveting die body 7, a proximity switch 8 and a tightening unit frame 1. The upper riveting die body 7 is provided at the center of the tightening unit frame 1. The upper riveting die tightening unit includes an upper riveting die positioning mechanism 6. The upper riveting die positioning mechanism 6 surrounds the upper riveting die body 7. The upper riveting die positioning mechanism 6 includes a first movable part 62. The first movable part 62 can partially embed into the upper riveting die body 7. When the first movable part 62 embeds into the upper riveting die body 7, the upper riveting die body 7 is fixed relative to the tightening unit frame 1. In this embodiment, the first movable part 62 is a sphere.

[0024] Through the above settings, the first movable part 62 naturally embeds into the recess of the upper riveting die body 7 under the action of gravity, avoiding manual control of the positions of the upper riveting die tightening unit and the upper riveting die positioning mechanism 6, reducing the working intensity of the operator while ensuring the position accuracy of the upper riveting die body 7; further, the upper riveting die tightening unit includes a plurality of upper riveting die positioning mechanisms 6 that circumferentially surround the upper riveting die body 7, ensuring that the positioning force of the upper riveting die body 7 by the upper riveting die positioning mechanism 6 is uniform, avoiding skew of the upper riveting die body 7 during the feeding process, resulting in uneven heights of the rivet heads; it should be noted that in this embodiment of Figure 4 , the first piston rod 61 is in a lifted state under the action of the second elastic body 63 and thus interferes with the first movable part 62. In the actual working process, when the first piston rod 61 is in a lifted state, the first movable part 62 should be in the gap between the first piston rod 61 and the movable part air duct 5; when the first piston rod 61 drops due to the air intake of the movable part air duct 5 and compresses the second elastic body 63, the first movable part 62 rolls down and adheres tightly to the upper riveting die body 7; when the chamber where the first piston rod 61 is located is further inflated and the operator disassembles the upper riveting die body 7, the first movable part 62 rolls back into the gap between the first piston rod 61 and the movable part air duct 5 under the extrusion of the upper riveting die body and its own gravity.

[0025] AsFigure 3 As shown in the figure, one end of the upper riveting die body 7 close to the tension unit frame 1 is the body fixed end. A first bushing 3 is provided on the outer wall of the body fixed end. The upper riveting die positioning mechanism 6 is located inside the first bushing 3. The upper riveting die positioning mechanism 6 includes a moving part air passage 5. One end of the moving part air passage 5 communicates with the outer wall of the first bushing 3, and the other end of the moving part air passage 5 communicates with the upper riveting die body 7. A first moving part 62 is located inside the moving part air passage 5, and the shape of the first moving part 62 matches the cross-section of the moving part air passage 5. The moving part air passage 5 is used to inflate the chamber where the first moving part 62 in the upper riveting die positioning mechanism 6 is located, pressing the first moving part 62 against the upper riveting die body 7 to ensure the stable connection between the upper riveting die body 7 and the upper riveting die positioning mechanism 6. The first bushing 3 is used to cover the body fixed end of the upper riveting die body 7, adjusting the cross-sectional area at the upper end of the upper riveting die body 7, which is beneficial for the tension unit frame 1 to transmit the riveting force to the upper riveting die during the riveting process, avoiding the cross-sectional area of the body fixed end being smaller than the cross-sectional area of the contact section between the upper riveting die body 7 and the processed product, resulting in the body fixed end breaking due to stress, and at the same time reducing the material used to make the upper riveting die body 7 to avoid material waste.

[0026] As Figure 3 shown in the figure, the moving part air passage 5 includes a first air passage. The extending direction of the first air passage is the same as the extending direction of the upper riveting die body 7. A first piston rod 61 is provided inside the first air passage. There is a variable gap between the first piston rod 61 and the first air passage, and the first moving part 62 cooperates with the gap. Through the above settings, it is beneficial for the gap between the first piston rod 61 and the first air passage to accommodate the first moving part 62. After the first air passage exhausts air, the first moving part 62 ends the state of being tightly attached to the upper riveting die body 7, and the first moving part 62 moves to the gap between the first piston rod 61 and the first air passage due to its own gravity, enabling the upper riveting die body 7 to move relative to the first bushing 3, improving the disassembly speed of the upper riveting die body 7 and facilitating the operator to disassemble and replace the upper riveting die body 7.

[0027] Combined with Figure 3 and Figure 4 shown in the figure, a second elastic body 63 is provided at the end of the first piston rod 61. The second elastic body 63 can automatically adjust the relative height between the first piston rod 61 and the upper riveting die body 7, enabling the first moving part 62 to switch between the two states of being tightly attached to and away from the upper riveting die body 7 due to its own gravity, facilitating the operator to quickly fix and disassemble the upper riveting die body 7 and reducing the workload of the operator.

[0028] As Figure 2 and Figure 6As shown, the upper riveting die tensioning unit further includes a second bushing 4. The second bushing 4 is located on the outer wall of the first bushing 3. A second movable member 10 is provided on the outer wall of the first bushing 3, and the second movable member 10 can move relative to the second bushing 4. The second bushing 4 and the first bushing 3 replace the upper riveting die body 7 and the tensioning unit frame 1 to undergo friction during the feeding and retracting processes of the upper riveting die body 7, reducing the wear of the upper riveting die body 7 and the tensioning unit frame 1 and extending the service life. Moreover, a second movable member 10 is provided on the outer wall of the first bushing 3. The second movable member 10 is relatively fixed to the upper riveting die body 7, and the movement displacement of the second movable member 10 relative to the second bushing 4 can indicate the feeding and retracting amounts of the upper riveting die body 7.

[0029] Combined with Figure 2 、 Figure 5 and Figure 6 As shown, the second bushing 4 is provided with a first groove. The second movable member 10 is located inside the first groove. Proximity switches 8 are provided on both sides of the first groove of the second bushing 4. The proximity switches 8 can move relative to the first groove, and the movement directions of the proximity switches 8 and the second movable member 10 are on the same straight line. A first elastic body 2 is provided at the top of the first bushing 3 and is connected to the tensioning unit frame 1. The first groove is opened to accommodate the second movable member 10, and the second groove is used to more intuitively indicate the movement displacement of the upper riveting die body 7 relative to the second bushing 4, that is, the feeding amount of the upper riveting die body 7 relative to the tensioning unit frame 1. Further, proximity switches 8 are provided on both sides of the second groove. When the second movable member 10 approaches the proximity switches 8, a signal will be emitted, replacing the operator to control and observe the displacement of the second movable member 10 in the first groove, improving the feeding accuracy of the upper riveting die body 7 and reducing the workload of the operator.

[0030] As Figure 6 and Figure 7 As shown, a switch adjustment block 9 is provided at one end of the first groove away from the tensioning unit frame 1. The switch adjustment block 9 can adjust the positions of the proximity switches 8 relative to the first groove respectively. The proximity switches 8 include a first proximity switch 81 and a second proximity switch 82. The first proximity switch 81 is close to the upper end of the first groove, and the second proximity switch 82 is close to the lower end of the first groove. The position of the proximity switch 8 is adjusted by using the switch adjustment block to change the position where the second movable member 10 approaches the proximity switch 8 and emits a signal, so that the proximity switch 8 can be applicable to the displacements of different second movable members 10, enabling the proximity switch 8 to emit a signal under different feeding amounts of the upper riveting die body 7, improving the versatility of the proximity switch 8 and the automation degree of the upper riveting die tensioning unit.

[0031] Combined with Figure 6 and Figure 7As shown in the figure, a second groove is provided on the outer side of the second bushing 4. The bottom of the second groove is the outer wall of the first bushing 3, and the second groove is connected to the moving part air passage 5. The moving part air passage 5 is located at the bottom of the second groove, which is beneficial for an external pipeline to pass through the second groove and connect to the moving part air passage 5, avoiding interference between the external pipeline and the second bushing 4 during the movement of the upper riveting die body 7, and shortening the distance between the external pipeline and the moving part air passage 5.

[0032] The present invention provides an upper riveting die tensioning unit, which accurately positions the upper riveting die body 7 in the upper riveting die tensioning unit, controls the installation accuracy of the upper riveting die, and protects the processed product and the upper riveting die body 7 from quality problems caused by the position error of the upper riveting die body 7 during the processing; detects the feeding and retracting positions of the upper riveting die body 7 to avoid errors in the movement of the upper riveting die body 7 during the processing, resulting in processing quality problems and collisions of the upper riveting die body 7, and has the following beneficial effects. The upper riveting die tensioning unit includes a plurality of upper riveting die positioning mechanisms 6 surrounding the upper riveting die body 7 in a circumferential manner, ensuring that the positioning force of the upper riveting die body 7 by the upper riveting die positioning mechanisms 6 is uniform, avoiding skew of the upper riveting die body 7 during the feeding process, resulting in uneven heights of the rivet heads; can emit signals according to the feeding and retracting amounts of the upper riveting die body 7 to assist the operator in judging or automatically judging the displacement of the upper riveting die body 7, avoiding errors in the movement of the upper riveting die body 7 during the processing, resulting in processing quality problems and collisions of the upper riveting die body 7; the first moving part 62 switches between two states of closely adhering to and moving away from the upper riveting die body 7 by its own gravity, facilitating the operator to quickly fix and disassemble the upper riveting die body 7 and reducing the working intensity of the operator.

[0033] The above embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for realizing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

Claims

1. An upper riveting die tensioning unit, comprising an upper riveting die body (7) and a tensioning unit frame (1), characterized in that, The upper riveting die body (7) is provided at the center of the tensioning unit frame (1). The upper riveting die tensioning unit includes an upper riveting die positioning mechanism (6). The upper riveting die positioning mechanism (6) surrounds the upper riveting die body (7). The upper riveting die positioning mechanism (6) includes a first movable part (62). The first movable part (62) can be partially embedded in the upper riveting die body (7). When the first movable part (62) is embedded in the upper riveting die body (7), the upper riveting die body (7) is fixed relative to the tensioning unit frame (1). One end of the upper riveting die body (7) close to the tensioning unit frame (1) is the body fixed end, and a first bushing (3) is provided on the outer wall of the body fixed end. The upper riveting die tensioning unit further includes a second bushing (4). The second bushing (4) is located on the outer wall of the first bushing (3). A second movable part (10) is provided on the outer wall of the first bushing (3). The second movable part (10) can move relative to the second bushing (4). The second bushing (4) is provided with a first groove body. The second movable part (10) is located inside the first groove body. Proximity switches (8) are provided on both sides of the first groove body of the second bushing (4). The proximity switches (8) can move relative to the first groove body. The moving direction of the proximity switches (8) and the moving direction of the second movable part (10) are on the same straight line. A first elastic body (2) is provided at the top of the first bushing (3) and is connected to the tensioning unit frame (1). The second movable part (10) is relatively fixed to the upper riveting die body (7). When the second movable part (10) approaches the proximity switch (8), it will emit a signal. The upper riveting die positioning mechanism (6) further includes a movable part air duct (5). One end of the movable part air duct (5) communicates with the outer wall of the first bushing (3), and the other end of the movable part air duct (5) communicates with the upper riveting die body (7). The first movable part (62) is located inside the movable part air duct (5).

2. The upper riveting die tightening unit according to claim 1, characterized in that, The upper riveting die positioning mechanism (6) is located inside the first bushing (3).

3. The upper riveting die tightening unit according to claim 2, wherein The outer shape of the first movable part (62) matches the cross-section of the movable part air duct (5).

4. The upper riveting die tightening unit according to claim 1, characterized in that, A switch adjustment block (9) is provided at one end of the first groove body away from the tensioning unit frame (1). The switch adjustment block (9) can adjust the positions of the proximity switches (8) relative to the first groove body respectively. The proximity switch (8) includes a first proximity switch (81). The first proximity switch (81) is close to the upper end of the first groove body.

5. The upper riveting die tightening unit according to claim 4, characterized in that, The proximity switch (8) further includes a second proximity switch (82). The second proximity switch (82) is close to the lower end of the first groove body.

6. The tightening unit of the upper riveting die according to claim 1, wherein A second groove body is provided on the outer side of the second bushing (4). The bottom of the second groove body is the outer wall of the first bushing (3). The second groove body is connected to the movable part air duct (5).

7. The tightening unit of the upper riveting die according to claim 3, characterized in that, The movable part air passage (5) includes a first air passage. The extending direction of the first air passage is the same as that of the upper riveting die body (7). A first piston rod (61) is arranged inside the first air passage. There is a variable gap between the first piston rod (61) and the first air passage. The first movable part (62) is matched with the gap.

8. The upper riveting die tensioning unit according to claim 7, characterized in that, A second elastic body (63) is arranged at the end of the first piston rod (61).

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