Automatic riveting mechanism

Abstract

The utility model discloses an automatic riveting mechanism in the technical field of riveting, which relates to the technical field of riveting and comprises a worktable, a linear module is arranged at the upper end of the worktable, a riveting device connected to the worktable is arranged in the middle of the linear module, and the linear module is connected with a moving table for placing a workpiece. The movable table moves to the position of the riveting device on the linear module to achieve automatic riveting, the workbench is provided with a first taking and placing end and a second taking and placing end, the first taking and placing end and the second taking and placing end correspond to the two ends of the linear module respectively, and the two ends of the movable table are provided with a first station and a second station respectively. The second station is positioned on one side of the second pick-and-place end; when the second station moves to the riveting device, the first station is located on one side of the first pick-and-place end; and through the arrangement of the first station and the second station, the workpiece taking and placing process and the riveting process are alternately carried out, and the working efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting, in particular to an automatic riveting mechanism. Background Art

[0002] The air conditioner bracket is a key component for fixing the indoor unit of the air conditioner to the wall. Its firmness directly determines the installation quality of the indoor unit. The bracket is made of a horizontal beam and two vertical beams riveted in an H shape. The riveting process is generally completed by punching with a mold on a punch press. The punch press consumes a lot of energy, has low production efficiency, and has high costs for workpiece installation and mold manufacturing. It is impossible to avoid the safety hazards caused by the punch press pulley and connecting car.

[0003] The patent document with announcement number CN213079802U proposes a fully automatic riveting machine for air-conditioning wall-mounted panels. The first stepper motor assembly drives the riveting mechanism to achieve lateral movement, and the second stepper motor drives the bracket support platform to achieve longitudinal movement. After stable position adjustment, the riveting head is aligned with the riveting position of the workpiece to be riveted to achieve automatic riveting operation.

[0004] However, in the above technical solution, after the user places and fixes the workpiece, the sliding seat drives the workpiece to move, rivet, and then return. The entire journey takes a long time, and other effective processing operations generally cannot be performed during the journey and riveting period. The processing efficiency needs to be further improved. Utility Model Content

[0005] In order to overcome the shortcoming of the slow riveting speed of workpieces in the prior art, the technical problem to be solved by the utility model is to further improve the working efficiency of the riveting process of the workpieces.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The utility model proposes an automatic riveting mechanism, comprising a workbench, a linear module is arranged at the upper end of the workbench, a riveting device connected to the workbench is arranged at the middle position of the linear module, the linear module is connected to a movable table for placing workpieces, the movable table moves on the linear module to the position of the riveting device to realize automatic riveting, the workbench is provided with a first pick-up and placement end and a second pick-up and placement end, the first pick-up and placement end and the second pick-up and placement end respectively correspond to the two end positions of the linear module, and the two ends of the movable table along the length direction of the linear module are respectively provided with a first station and a second station, when the first station moves to the riveting device, the second station is at the second pick-up and placement end position or a position close to the second pick-up and placement end; when the second station moves to the riveting device, the first station is at the first pick-up and placement end position or a position close to the first pick-up and placement end; two groups of workpieces are placed respectively on the first station and the second station, and they move synchronously during work, so as to realize the alternation of picking up and placing workpieces and riveting process, which can effectively improve work efficiency, and the whole process is stable and easy to operate.

[0008] Furthermore, a group of linear modules, a group of riveting devices and a movable table constitute a riveting unit, and two riveting units are arranged in parallel at the upper end of the workbench; by arranging an operator at the first pick-up and placement end and the second pick-up and placement end of the workbench respectively, the two riveting units can work synchronously, and four groups of workpieces can enter the riveting program at the same time, and the operator can collect the workpieces at a single-side workstation without moving from the first workstation to the second workstation to work, thereby further improving the operator's work efficiency and reducing the operator's labor intensity.

[0009] Furthermore, the linear module includes a linear guide rail, the linear guide rail is slidingly provided with a slide seat, the slide seat is connected to the moving table, the workbench is provided with a servo motor, the output end of the servo motor is connected to a lead screw, the outer thread of the lead screw is sleeved with a spiral bearing, and the spiral bearing is connected to the slide seat; the servo motor drives the lead screw to rotate, and the lead screw cooperates with the spiral bearing to drive the slide seat to move on the linear guide rail. Through the stable cooperation of the spiral bearing and the lead screw, the slide seat can drive the moving table to move smoothly and at a uniform speed, thereby improving the stability of the entire working process.

[0010] Furthermore, a guide light axis is arranged parallel to the length direction of the linear guide rail, and a linear bearing is arranged on the slide seat for sliding cooperation with the guide light axis. The stability of the linear movement of the slide seat is further improved through the stable sliding cooperation between the guide light axis and the linear bearing.

[0011] Furthermore, the riveting device includes a mounting frame, which is connected to a pneumatic riveting assembly. The linear module is located below the pneumatic riveting assembly. The riveting process is achieved by pneumatic driving, and has the advantages of fast response, stable and precise movement.

[0012] Furthermore, the pneumatic riveting assembly includes a booster cylinder connected to a mounting frame, a driving end of the booster cylinder is vertically downward and connected to an upper die seat, a rivet head is provided at the lower end of the upper die seat, and two groups of lower die seats are provided at the upper end of the workbench. The two groups of lower die seats are respectively located on both sides of the linear die group, and the position of the lower die seat corresponds to the position of the upper die seat; the setting of the upper and lower die seats can stably support and stabilize the workpiece during the riveting process.

[0013] Furthermore, a telescopic component is arranged between the lower die base and the workbench, and the telescopic component drives the lower die base to move towards and away from the linear module. By driving the lower die base to move towards and away from the linear module by the telescopic component, it is possible to avoid the lower die base causing obstruction or scratches to the sliding seat or workpiece in a moving state.

[0014] Furthermore, a plurality of positioning columns are vertically arranged at the upper end of the upper die seat, and a plurality of positioning holes that slide with the positioning columns are opened on the mounting frame. The sliding cooperation between the positioning columns and the positioning holes prevents the upper die seat and the rivet head from shifting or shaking, thereby effectively improving the stability of the upper die seat movement and the accuracy of the riveting process.

[0015] Furthermore, both the first station and the second station are provided with limit members to improve the stability of the workpiece during the riveting process.

[0016] Furthermore, it also includes a PLC control system. The linear module and the riveting device are electrically connected to the PLC control system. The PLC control system can improve the automated control effect of the linear module and the riveting device, and the entire operation process can be completed without more operations, thereby improving work efficiency.

[0017] The beneficial effects of the utility model are:

[0018] The linear module drives the moving table to realize linear reciprocating movement, so that the first station and the second station can be alternately moved to the riveting position. When the workpiece on the first station is riveted, the second station performs the workpiece pick-up and placement process at the second placement end. Similarly, when the second station moves to the riveting device to realize the riveting process, the first station performs the workpiece pick-up and placement process at the first placement end, realizing alternating work of the two stations, making rational use of the idle time of the riveting device during riveting, realizing continuous processing, and improving the work efficiency of the riveting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0021] Figure 3 It is a schematic diagram of the riveting device of the utility model;

[0022] Figure 4 This is a schematic diagram of the assembly relationship of the linear module of the utility model;

[0023] Figure 5 This is a schematic diagram of the position relationship of the double riveting units of the utility model;

[0024] Figure 6 It is a top view schematic diagram of the double riveting unit of the utility model;

[0025] Markings in the figure are: 1-workpiece, 2-workbench, 3-linear module, 4-riveting device, 5-moving table, 6-first pick-up and placement end, 7-second pick-up and placement end, 8-first station, 9-second station, 31-linear guide, 32-screw, 33-spiral bearing, 34-slide, 41-boosting cylinder, 42-mounting frame, 43-upper die base, 44-lower die base, 45-riveting head, 46-telescopic assembly, 47-positioning column. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] according to Figure 1 , Figure 2 As shown, the embodiment of the present application proposes an automatic riveting mechanism, including a workbench 2, a linear module 3 is arranged on the upper end of the workbench 2, a riveting device 4 connected to the workbench 2 is arranged in the middle position of the linear module 3, the linear module 3 is connected to a movable table 5 for placing a workpiece 1, the movable table 5 moves on the linear module 3 to the riveting device 4 to realize automatic riveting, the workbench 2 is provided with a first pick-up and placement end 6 and a second pick-up and placement end 7, the first pick-up and placement end 6 and the second pick-up and placement end 7 respectively correspond to the two end positions of the linear module 3, and the two ends of the movable table 5 along the length direction of the linear module 3 are respectively a first station 8 and a second station 9; when the first station 8 moves to the riveting device 4, the second station 9 is located on one side of the second pick-up and placement end 7, and the position of the second pick-up and placement end 7 coincides with or is close to the second pick-up and placement end 7, which can ensure that the operator can normally pick up the workpiece at the second pick-up and placement end 7 at the second station 9 Place the workpiece; when the second station 9 moves to the riveting device 4, the first station 8 is located at the position of the first pick-up and placement end 6 or close to the first pick-up and placement end 6, which can ensure that the operator can normally pick up and place the workpiece on the first station 8 at the first pick-up and placement end 6; wherein the linear module 3 can be a screw ball linear module or other existing linear module, as well as other mechanisms that can realize linear reciprocating motion, which can ensure that the moving table 5 is driven to move under the corresponding electric control action, and the riveting device 4 is arranged between the linear modules 3, and the length of the workbench 2 is greater than half of the length of the workbench 2, that is, when one of the first station 8 or the second station 9 is below the riveting device 4, the other station is stable at the corresponding pick-up and placement end position, which can ensure the comfort of the operator's operation, and must ensure that the operator's pick-up and placement position is away from the riveting station to ensure the safety of the operator.

[0028] In order to ensure the best driving mode, such as Figure 4 As shown, the linear module 3 includes a linear guide 31, the linear guide 31 is slidably provided with a slide 34, the slide 34 is connected to the moving table 5, the workbench 2 is provided with a servo motor, the output end of the servo motor is connected to a screw rod 32, the outer side of the screw rod 32 is threadedly sleeved with a spiral bearing 33, and the spiral bearing 33 is connected to the slide 34. During actual operation, the servo motor drives the screw rod 32 to rotate by setting a coupling, and the screw rod 32 and the spiral bearing 33 cooperate to drive the slide 34 and the moving table 5 to achieve stable reciprocating movement on the linear guide 31, and the cooperation of the screw rod 32 and the spiral bearing 33 realizes linear motion, and the driving effect is more stable and precise.

[0029] The linear guide rail 31 is provided with a guide light axis in parallel along the length direction, and the slide 34 is provided with a linear bearing that slides with the guide light axis. Specifically, the number of linear bearings is limited to four groups, that is, two groups of linear bearings are respectively provided on both sides of the slide in the width direction, so that the effect is more balanced.

[0030] Moreover, the driving mode of the above-mentioned riveting device 4 can be a motor-driven structure, and the displacement of the riveting structure is realized by the motor-driven riveting structure for riveting, and the riveting process can also be performed by hydraulic or pneumatic driving. Specifically, the riveting end of the riveting device 4 is an existing riveting machine mechanism, which mainly relies on pressure to act on the two separated workpieces 1, so that the workpieces 1 are riveted together, and the vertical displacement of the riveting end can provide sufficient riveting pressure; preferably, as Figure 2 , Figure 3 As shown, the riveting device 4 includes a mounting frame 42, the mounting frame 42 is connected to a pneumatic riveting assembly, and the linear module 3 is located below the pneumatic riveting assembly; the pneumatic riveting assembly has the advantages of fast response, easy control and high precision, and specifically, the pneumatic riveting assembly includes a booster cylinder 41 connected to the mounting frame 42, the driving end of the booster cylinder 41 is vertically downward and connected to an upper die seat 43, a riveting head 45 is provided at the lower end of the upper die seat 43, two groups of lower die seats 44 are provided at the upper end of the workbench 2, the two groups of lower die seats 44 are respectively located on both sides of the linear module 3, and the position of the lower die seat 44 corresponds to the position of the upper die seat 43. In actual work, the booster cylinder 41 drives the upper die seat 43 under the driving action of the existing pneumatic drive system. The die base 43 is moved up and down, and drives the riveting head 45 to achieve stable up and down reciprocating movement. The riveting head 45 is the riveting head 45 structure of the existing riveting machine; in a working formation, when the movable table 5 moves under the drive of the linear module 3, when the riveting position of the workpiece 1 on the first station 8 or the second station 9 reaches the position directly below the riveting head 45, the pneumatic system of the booster cylinder 41 is started under the action of the sensor or the travel switch or the manual drive, driving the upper die base 43 together with the riveting head 45 to descend, and the workpiece 1 is limited between the upper die base 43 and the lower die base 44, and the workpiece 1 is stably riveted. After the riveting is completed, the riveting head 45 rises to complete the riveting process of the workpiece 1 on the single station.

[0031] It is worth noting that the above-mentioned riveting joints 45 can be multiple and are arranged at the lower end of the upper die base 43, and the multiple riveting joints 45 respectively correspond to multiple riveting positions that may be required by the workpiece 1, so that the complete riveting process can be achieved without displacing the entire riveting device 4.

[0032] In actual work, the lower die base 44 may require a larger width dimension due to the need for optimal support effect, which may affect the normal displacement of the slide 34, or the workpiece 1 may rub against the upper end of the lower die base 44 when moving in a straight line, thereby affecting stability. In order to solve the above problems, a telescopic component 46 is arranged between the lower die base 44 and the workbench 2. The telescopic component 46 drives the lower die base 44 to move closer to and away from the linear module 3. Specifically, the telescopic component 46 can be an electric, hydraulic or pneumatic telescopic component, preferably, an existing pneumatic telescopic structure. In actual work, after the riveting process is completed, the telescopic component 46 controls the lower module to move in the direction away from the linear module 3, ensuring that a certain gap is formed with the slide 34 or the workpiece 1 to ensure that there is no interference with each other. On the contrary, when the workpiece 1 reaches the riveting position, the rivet head 45 moves downward, and the telescopic component 46 controls the lower module to move in the direction close to the linear module 3.

[0033] In addition, in actual work, the pneumatic system of the booster cylinder 41 may shake or deviate during the process of driving the upper mold base 43 to achieve lifting and displacement. In order to ensure the stability of the upper mold base 43 during the lifting and lowering process, a plurality of positioning columns 47 are vertically arranged on the upper end of the upper mold base 43, and the mounting frame 42 is provided with a plurality of positioning holes that slide with the positioning columns 47. Preferably, two positioning columns 47 are arranged on each side of the width direction of the upper mold base 43, and the four positioning columns 47 are located at the four end points of the cuboid to ensure the balance of the positioning force, and four O-shaped bearings are arranged in the four positioning holes, and the four positioning columns 47 respectively pass through the four O-shaped bearings to further improve stability and reduce wear.

[0034] In the actual air-conditioning bracket riveting process, when the air-conditioning bracket is placed on the first station 8 or the second station 9, the air-conditioning bracket is an H-shaped sheet metal connector formed by riveting two vertical rods and one horizontal rod. The two vertical rods are placed on the placement table of the first station 8 or the second station 9, and a horizontal rod is placed between the two vertical rods, so that the two vertical rods and one horizontal rod form an H shape. The first station 8 and the second station 9 are both provided with limiting members to ensure that the two vertical rods remain stable. At this time, the horizontal rod is placed between the two vertical rods, and the limiting is achieved by rivets to perform a stable automatic riveting process.

[0035] The above-mentioned limiting member can be a clamping groove adapted to the specific shape of the workpiece 1, or a limiting column matched with the through hole on the workpiece 1, or a combination of the clamping groove and the limiting column, which can achieve a stable placement effect of the workpiece 1.

[0036] Specifically, the control of the entire processing flow can be achieved by manually implementing button control of each step to achieve normal operation of the entire process. In order to further improve the fully automatic operation process, the present embodiment also includes a PLC control system, and the linear module 3 and the riveting device 4 are electrically connected to the PLC control system; that is, the two working states of "manual" and "automatic" can be switched through the PLC control system, and a touch screen operation interface is provided, through which the various parameters can be monitored in real time and the action state can be adjusted in real time, as well as parameter settings, screen settings, position distances, action speeds, and in-place delay settings.

[0037] In the actual whole operation process, the specific operation flow is, long press the "start" button for 3 seconds, the linear module 3 starts to return to the origin; after the moving table 5 returns to the origin position, it automatically switches to the "automatic state". After the placement of the workpiece 1 is completed, press the automatic start button, the servo motor drives the workbench 2 to drive the workpiece A on the first station 8 to move to the riveting position, after the workpiece A is in place, the booster cylinder 41 automatically runs down to the lower limit position under the induction action of the sensor, so that the upper die base 43 and the lower die base 44 are in the riveting position, the booster cylinder 41 is pressurized for 2 seconds to complete the riveting process; at the same time, the second station 9 of the tooling takes and places the workpiece, and the pressure is increased and released after the riveting is completed. After the pressure is released, the cylinder moves up to the upper limit position, and the servo motor moves the workpiece B of the second station 9 into place for riveting. At the same time, the workpiece A of the first station 8 is removed, and then a new workpiece is placed, and the cycle is repeated.

[0038] In some actual work, the operator may have to walk back and forth between the first pick-and-place end 6 and the second pick-and-place end 7 to complete the work, or workers may be arranged at the first pick-and-place end 6 and the second pick-and-place end 7, respectively. This may cause the operator's labor intensity to increase or the labor cost to increase. In order to solve the above problems, Figure 5 , Figure 6 As shown, the linear module 3, the riveting device 4 and the movable table 5 constitute a riveting unit, and two riveting units are arranged in parallel on the upper end of the workbench 2, that is, two operators are respectively positioned at the first pick-up and placement end 6 and the second pick-up and placement end 7, one of the operators is responsible for picking up and placing the workpieces on the first station 8 of the two riveting units, and the other operator is responsible for picking up and placing the workpieces on the second station 9 of the two riveting units.

[0039] It is worth noting that the movement pattern of the movable table 5 on the two riveting units can be achieved through corresponding parameter debugging. When the operator of the first pick-and-place end 6 completes the pick-and-place of the workpiece 1 at the first station 8 of one riveting unit, the first station 8 of the other riveting unit just reaches the first pick-and-place end 6, which is convenient for the operator to continue to pick up and place the workpiece 1. The operator of the second pick-and-place end 7 can implement the same operation process as the above content.

[0040] The utility model proposes an automatic riveting mechanism, including a workbench 2, a linear module 3 is arranged on the upper end of the workbench 2, a riveting device 4 connected to the workbench 2 is arranged in the middle of the linear module 3, the linear module 3 is connected to a moving table 5 for placing a workpiece 1, the moving table 5 moves on the linear module 3 to the riveting device 4 to realize automatic riveting, the workbench 2 is provided with a first pick-up and placement end 6 and a second pick-up and placement end 7, the first pick-up and placement end 6 and the second pick-up and placement end 7 respectively correspond to the positions of the two ends of the linear module 3, and the two ends of the moving table 5 along the direction of the linear module 3 are divided into The first station 8 and the second station 9 are respectively provided; when the first station 8 is moved to the riveting device 4, the second station 9 is located on one side of the second pick-up and placement end 7; when the second station 9 is moved to the riveting device 4, the first station 8 is located on one side of the first pick-up and placement end 6, and two groups of workpieces 1 can be placed respectively through the first station 8 and the second station 9, and move synchronously during work to realize the alternation of picking up and placing the workpieces 1 and the riveting process, which can effectively improve the work efficiency, and the structure is relatively simple, which is convenient for assembly, maintenance and disassembly, can reduce labor costs and increase economic benefits.

Claims

1. An automatic riveting mechanism, comprising a workbench (2), a linear module (3) being arranged at the upper end of the workbench (2), a riveting device (4) connected to the workbench (2) being arranged at the middle of the linear module (3), the linear module (3) being connected to a movable table (5) for placing a workpiece (1), the movable table (5) being moved on the linear module (3) to the riveting device (4) to realize automatic riveting of the workpiece (1), characterized in that: The workbench (2) is provided with a first pick-up and placement end (6) and a second pick-up and placement end (7), and the first pick-up and placement end (6) and the second pick-up and placement end (7) respectively correspond to the two end positions of the linear module (3), and the movable table (5) is provided with a first workstation (8) and a second workstation (9) at the two ends along the length direction of the linear module (3); when the first workstation (8) moves to the riveting device (4), the second workstation (9) is located at the second pick-up and placement end (7) or a position close to the second pick-up and placement end (7); when the second workstation (9) moves to the riveting device (4), the first workstation (8) is located at the first pick-up and placement end (6) or a position close to the first pick-up and placement end (6).

2. The automatic riveting mechanism according to claim 1, characterized in that: A group of the linear modules (3), a group of the riveting devices (4) and a moving platform (5) form a riveting unit, and two riveting units are arranged in parallel on the upper end of the workbench (2).

3. The automatic riveting mechanism according to claim 1, characterized in that: The linear module (3) comprises a linear guide rail (31), the linear guide rail (31) is slidably provided with a slide seat (34), the slide seat (34) is connected to the movable platform (5), the workbench (2) is provided with a servo motor, the output end of the servo motor is connected to a screw rod (32), the outer side of the screw rod (32) is threadedly sleeved with a spiral bearing (33), and the spiral bearing (33) is connected to the slide seat (34).

4. The automatic riveting mechanism according to claim 3, characterized in that: The linear guide rail (31) is provided with a guide light axis in parallel along the length direction, and the slide seat (34) is provided with a linear bearing that is slidably matched with the guide light axis.

5. The automatic riveting mechanism according to claim 1, characterized in that: The riveting device (4) comprises a mounting frame (42), the mounting frame (42) is connected to a pneumatic riveting assembly, and the linear module (3) is located below the pneumatic riveting assembly.

6. The automatic riveting mechanism according to claim 5, characterized in that: The pneumatic riveting assembly comprises a booster cylinder (41) connected to the mounting frame (42), the driving end of the booster cylinder (41) is vertically downward and connected to an upper die base (43), a riveting head (45) is provided at the lower end of the upper die base (43), two groups of lower die bases (44) are provided at the upper end of the workbench (2), the two groups of lower die bases (44) are respectively located on both sides of the linear die group (3), and the position of the lower die base (44) corresponds to the position of the upper die base (43).

7. The automatic riveting mechanism according to claim 6, characterized in that: A telescopic assembly (46) is provided between the lower die base (44) and the workbench (2), and the telescopic assembly (46) drives the lower die base (44) to achieve movement towards and away from the linear module (3).

8. The automatic riveting mechanism according to claim 7, characterized in that: A plurality of positioning columns (47) are vertically arranged on the upper end of the upper die seat (43), and a plurality of positioning holes slidably matched with the positioning columns (47) are opened on the mounting frame (42).

9. The automatic riveting mechanism according to claim 1, characterized in that: The first workstation (8) and the second workstation (9) are both provided with limiting members.

10. The automatic riveting mechanism according to claim 1, characterized in that: It also comprises a PLC control system, and the linear module (3) and the riveting device (4) are both electrically connected to the PLC control system.

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