A servo-driven multi-head synchronous riveting device

Abstract

The invention discloses a servo-driven multi-head synchronous riveting device, comprising a base; a reducer is arranged on the lower surface of the base, the input end of the reducer is connected to a servo motor, the output end of the reducer passes through the base, a gear is fixed to the output end of the reducer, a gear mechanism is arranged on the base, and the gear at the output end of the reducer is meshed with the gear mechanism; a multi-head synchronous cutter disc mechanism is arranged on the gear mechanism, and a lifting mechanism is arranged between the bottom of the base and the multi-head synchronous cutter disc mechanism. The device automatically drives the multi-head synchronous riveting through a servo motor, and the servo motor and a high-precision displacement sensor loaded on the cutter rod perform relative full-closed-loop control, providing high-precision control of the riveting depth; parts with different inner diameters are fixed by replacing a matching positioning tooling, thereby improving the applicability of the device, the multi-head riveting quality and the production efficiency; the servo drive solves the problems of large footprint, oil leakage pollution and high energy consumption during non-working hours existing in traditional hydraulic devices.

Description

Technical Field

[0001] The invention relates to the technical field of automatic assembly, and in particular to a servo-driven multi-head synchronous riveting device. Background Art

[0002] During the processing or assembly of automotive parts and other industries, some parts need to be riveted and pressed together with paired parts to form new parts. In this process, not only the riveting strength must be guaranteed, but also the pressing force when the parts are separated must not be less than the process strength requirements. At the same time, the riveting depth must meet the product process requirements.

[0003] At present, multi-head riveting is generally achieved by driving a single rivet cutter through multiple sets of independent cylinders. However, during riveting, the riveting speeds of multiple sets of rivet cutters are often inconsistent, resulting in uneven initial force on the riveted objects, which cause them to deform and become scrapped. At the same time, since the cylinders need to be equipped with a hydraulic system, traditional devices also have the disadvantages of large footprint, oil leakage pollution, and high energy consumption during non-working hours. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a servo-driven multi-head synchronous riveting device to solve the above-mentioned problems.

[0005] Technical solution: The servo-driven multi-head synchronous riveting device described in the present invention includes a base; a reducer is arranged on the lower surface of the base, the input end of the reducer is connected to a servo motor, the output end of the reducer passes through the base, a gear is fixed to the output end of the reducer, a gear mechanism is arranged on the base, and the gear at the output end of the reducer is meshed with the gear mechanism; a multi-head synchronous cutter disc mechanism is arranged on the gear mechanism, and a lifting mechanism is arranged between the bottom of the base and the multi-head synchronous cutter disc mechanism.

[0006] Furthermore, the gear mechanism includes a housing, a driven rotating disk and a driven gear. The housing is fixedly connected to the base, and the housing has an opening at the gear near the output end of the reducer. The driven rotating disk is arranged in the housing and is rotatably connected to the inside of the housing. A protrusion is arranged near the opening of the housing, and the driven gear is fixedly connected to the protrusion. The driven gear is meshed with the gear at the output end of the reducer.

[0007] Furthermore, the multi-head synchronous cutter disc mechanism includes a cutter disc cover, a rivet knife, a cutter rod, a cutter disc fixing plate and a riveted turntable. The cutter disc cover, the cutter disc fixing plate and the riveted turntable are all hollow. The riveted turntable and the driven turntable are fixedly connected. The cutter disc fixing plate is arranged in the riveted turntable, and the riveted turntable rotates relative to the cutter disc fixing plate. The cutter rod is arranged at intervals along the circumference and embedded in the cutter disc fixing plate. The riveted turntable is provided with a plurality of straight grooves arranged along the circumference. The straight grooves are obliquely arranged in the riveted turntable. The rod body and the tail end of the cutter rod are installed in the straight grooves, and the tail end of the cutter rod contacts the inner wall of the riveted turntable in the straight grooves. The rivet knife is arranged at the front end of the cutter rod. The cutter disc cover and the cutter disc fixing plate are fixedly connected to the top of the shell body. When the cutter disc cover and the riveted turntable are fixed, the rivet knife extends out of the cutter cover plate. When the riveted turntable is driven by the driven turntable, the inner wall of the riveted turntable in the straight groove changes its inclination due to the inclined setting to squeeze the cutter rod and the rivet knife to move radially along the cutter disc fixing plate.

[0008] Furthermore, the lifting mechanism includes a flange, a cylinder and a positioning tool, the flange is fixedly connected to the base, the cylinder wall is fixedly connected to the flange edge, the cylinder rod is located in the flange, and the positioning tool is inserted from the cutter head cover and is detachably connected to the cylinder rod.

[0009] Furthermore, a measuring mechanism is provided on the base, the measuring mechanism is located on one side of the shell, and the measuring mechanism is used to monitor the riveting depth of the rivet cutter on the workpiece.

[0010] Beneficial effects: Compared with the prior art, the present invention: This device automatically drives multi-head synchronous riveting through a servo motor, and the servo motor and the high-precision displacement sensor loaded on the tool rod perform relative full-closed-loop control, providing high-precision control of the riveting depth; parts with different inner diameters are fixed by replacing a matching positioning tool, which improves the applicability of the device, the quality of multi-head riveting and the production efficiency; at the same time, the present invention solves the problems of large footprint, oil leakage pollution and high energy consumption during non-working hours in traditional hydraulic devices through servo drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a servo-driven multi-head synchronous riveting device;

[0012] Figure 2 It is a working schematic diagram of a servo-driven multi-head synchronous riveting device;

[0013] Figure 3 It is an exploded view of the driving part and base of the servo-driven multi-head synchronous riveting device;

[0014] Figure 4 It is an exploded view of the working part and base of the servo-driven multi-head synchronous riveting device;

[0015] Figure 5 This is a cross-sectional view of the working part and base of a servo-driven multi-head synchronous riveting device.

[0016] Figure 6 yes Figure 5 Enlarged view of point B. DETAILED DESCRIPTION

[0017] like Figure 1 and 3 As shown in 4, a servo-driven multi-head synchronous riveting device includes a base 1; a reducer 2 is arranged on the lower surface of the base 1, the input end of the reducer 2 is connected to a servo motor 3, the output end of the reducer 2 passes through the base 1, a gear 4 is fixed to the output end of the reducer 2, a gear mechanism 5 is arranged on the base 1, and the gear 4 at the output end of the reducer 2 is meshed with the gear mechanism 5; a multi-head synchronous cutter disc mechanism 6 is arranged on the gear mechanism 5, and a lifting mechanism 7 is arranged between the bottom of the base 1 and the multi-head synchronous cutter disc mechanism 6.

[0018] The servo motor 3 serves as a driving source.

[0019] The gear mechanism 5 includes a shell 51, a driven rotating disk 52 and a driven gear 53. The shell 51 is fixedly connected to the base 1. The shell 51 has an opening at the gear 4 near the output end of the reducer 2. The driven rotating disk 52 is arranged in the shell 51 and is rotatably connected to the inside of the shell 51. A protrusion 54 is arranged near the opening of the shell 51. The driven gear 53 is fixedly connected to the protrusion 54. The driven gear 53 is meshed with the gear 4 at the output end of the reducer 2.

[0020] The multi-head synchronous cutter disc mechanism 6 includes a cutter disc cover 61, a rivet knife 62, a cutter bar 63, a cutter disc fixing disc 64 and a riveted turntable 65. The cutter disc cover 61, the cutter disc fixing disc 64 and the riveted turntable 65 are all hollow. The riveted turntable 65 is fixedly connected to the driven turntable 52. The cutter disc fixing disc 64 is arranged in the riveted turntable 65. The riveted turntable 65 rotates relative to the cutter disc fixing disc 64. The cutter bar 63 is arranged at intervals along the circumferential direction and embedded in the cutter disc fixing disc 64. A plurality of straight grooves arranged along the circumference are arranged in the riveted turntable 65. The straight grooves are inclined in the riveted turntable 65. The rod body and the tail end of the knife rod 63 are installed in the straight groove, and the tail end of the knife rod 63 contacts the inner wall of the riveting turntable 65 in the straight groove. The rivet knife 62 is arranged at the front end of the knife rod 63, and the knife disc cover 61 and the knife disc fixing plate 64 are fixedly connected to the top of the shell 51. When the knife disc cover 61 and the riveting turntable 65 are fixed, the rivet knife 62 extends out of the knife cover plate. When the riveting turntable 65 is driven by the driven turntable 52, the inner wall of the riveting turntable 65 in the straight groove changes its inclination due to the inclined setting to squeeze the knife rod 63 and the rivet knife 62 to move radially along the knife disc fixing plate 64.

[0021] The lifting mechanism 7 includes a flange 71, a cylinder 72 and a positioning tool 73. The flange 71 is fixedly connected to the base 1, the wall of the cylinder 72 is fixedly connected to the edge of the flange 71, the cylinder rod is located in the flange 71, and the positioning tool 73 is inserted from the hollow of the cutter head cover 61 and is detachably connected to the cylinder rod.

[0022] like Figure 1 A measuring mechanism 8 is provided on the base 11 and is located on one side of the housing 51 . The measuring mechanism 8 is used to monitor the riveting depth of the rivet cutter 62 on the parts 9 and 10 . The measuring mechanism 8 feeds back the monitoring result to the control system through an electrical signal, and the control system controls the rotation of the servo motor 3 .

[0023] like Figure 1 , 2 , 5 and Figure 6 As shown, the working principle is: when the operator or the automatic feeding system embeds the parts 9 and 10 to be riveted into the hollow inside the cutter cover 61, and then fixes them with the positioning fixture 73, the external clamping mechanism 11 presses the positioning fixture 73 to rivet the parts 9 and 10; at the same time, the cylinder 72 provides an upward supporting force and presses the parts 9 and 10 against the external clamping mechanism 11 through the positioning fixture 73.

[0024] The control system, the servo motor 3 and the measuring mechanism 8 form a closed-loop control system. The control system starts to control the servo motor 3 to rotate at a set speed according to the instruction. The servo motor 3 drives the reducer 2 and the gear 4 on its output end to rotate. The gear 4 drives the driven gear 53 and the driven turntable 52 fixedly connected to the driven gear 53 to rotate. The driven turntable 52 drives the riveting turntable 65 to rotate. The riveting turntable 65 rotates relative to the cutter disc fixed plate 64. The inner wall of the riveting turntable 65 in the straight groove changes its inclination due to the inclined setting to squeeze the tool rod 63 and the rivet cutter 62 to move radially along the cutter disc fixed plate 64. The riveting turntable 65 synchronously pushes multiple groups of tool rods 63 and the rivet cutter 62 fixed by the tool rods 63 to perform radial synchronous riveting action. The tool body integrates the parts 9 and 10. During the riveting process, the measuring mechanism 8 monitors the riveting depth of the parts 9 and 10 by monitoring the movement length of the tool rod 63, so as to further measure the mechanism 8 and feed back the monitoring results to the control system through electrical signals, and the control system controls the rotation of the servo motor 3.

Claims

1. A servo-driven multi-head synchronous riveting device, comprising a base (1); characterized in that A reducer (2) is arranged on the lower surface of the base (1); the input end of the reducer (2) is connected to a servo motor (3); the output end of the reducer (2) passes through the base (1); a gear (4) is fixed to the output end of the reducer (2); a gear (4) mechanism is arranged on the base (1); the gear (4) at the output end of the reducer (2) is meshed with the gear (4) mechanism; a multi-head synchronous cutter disc mechanism (6) is arranged on the gear (4) mechanism; a lifting mechanism (7) is arranged between the bottom of the base (1) and the multi-head synchronous cutter disc mechanism (6); the gear (4) mechanism comprises a housing (51), a driven rotating disc (52) and a and a driven gear (53) (4), the housing (51) is fixedly connected to the base (1), the housing (51) is opened at the gear (4) near the output end of the reducer (2), the driven rotating disk (52) is arranged in the housing (51) and is rotatably connected to the inside of the housing (51), a protrusion (54) is arranged near the opening of the housing (51), the driven gear (53) (4) and the protrusion (54) are fixedly connected, and the driven gear (53) (4) is meshed with the gear (4) at the output end of the reducer (2); the multi-head synchronous cutter disc mechanism (6) includes a cutter disc cover (61), a rivet knife (62), a cutter rod (6 3) a cutter disc fixing plate (64) and a riveted rotating plate (65); the cutter disc cover (61), the cutter disc fixing plate (64) and the riveted rotating plate (65) are all hollow; the riveted rotating plate (65) and the driven rotating plate (52) are fixedly connected; the cutter disc fixing plate (64) is arranged in the riveted rotating plate (65); the riveted rotating plate (65) rotates relative to the cutter disc fixing plate (64); the cutter bar (63) is arranged at intervals along the circumference and embedded in the cutter disc fixing plate (64); a plurality of straight grooves arranged along the circumference are arranged in the riveted rotating plate (65); the straight grooves are obliquely arranged in the riveted rotating plate (65); the rod body and the tail end of the cutter bar (63) are The blade (63) is installed in the straight groove, and the rear end of the blade rod (63) contacts the inner wall of the riveting turntable (65) in the straight groove. The rivet knife (62) is arranged at the front end of the blade rod (63). The blade cover (61) and the blade fixing plate (64) are fixedly connected to the top of the shell (51). When the blade cover (61) and the riveting turntable (65) are fixed, the rivet knife (62) extends out of the blade cover plate. When the riveting turntable (65) is driven by the driven turntable (52), the inner wall of the riveting turntable (65) in the straight groove changes its inclination due to the inclined setting to squeeze the blade rod (63) and the rivet knife (62) to move radially along the blade fixing plate (64).

2. A servo-driven multi-head synchronous riveting device according to claim 1, characterized in that The lifting mechanism (7) comprises a flange (71), a cylinder (72) and a positioning tool (73); the flange (71) is fixedly connected to the base (1); the wall of the cylinder (72) is fixedly connected to the edge of the flange (71); the rod of the cylinder (72) is located in the flange (71); and the positioning tool (73) is inserted from the cutter head cover (61) and is detachably connected to the rod of the cylinder (72).

3. A servo-driven multi-head synchronous riveting device according to claim 1, characterized in that A measuring mechanism (8) is provided on the base (1), the measuring mechanism (8) is located on one side of the housing (51), and the measuring mechanism (8) is used to monitor the riveting depth of the rivet cutter (62) on the workpiece.

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