Automatic riveting machine for front anti-collision beam

Abstract

The utility model discloses an automatic riveting machine for a front anti-collision beam, which comprises positioning fixtures and a rotating machine table, two positioners capable of rotating around the central axis of the positioners are symmetrically arranged on the rotating machine table, each positioner is fixedly provided with a positioning fixture, one side of the rotating machine table is provided with a multi-axis manipulator, and the other side of the rotating machine table is provided with a riveting device. An automatic riveting gun is arranged at the end of the multi-axis mechanical arm, each positioning clamp comprises a plurality of lower supporting bases fixed to a positioner, the lower supporting bases are matched with the lower end face of an arc-shaped workpiece in shape, connecting frames are fixedly arranged at the two ends of the positioner, and an upper supporting base is rotationally arranged on each connecting frame. Lower wedge-shaped convex blocks and limiting columns are fixed to the lower supporting seats at the two ends, and upper wedge-shaped fixed concave blocks are fixed to the upper supporting seats. The lower wedge-shaped convex block can be embedded into the upper wedge-shaped fixed concave block, and the limiting column can be inserted into the arc-shaped workpiece. The arc-shaped workpiece is simply positioned, and the riveting efficiency of the arc-shaped workpiece is improved.

Description

Technical Field

[0001] The utility model relates to the field of riveting, in particular to an automatic riveting machine for a front anti-collision beam. Background Art

[0002] For riveting with arc-shaped workpieces (such as front bumper beams), riveting machines are currently used. For riveting with arc-shaped workpieces, it is necessary to position and fix the arc-shaped workpieces. For example, the utility model with the authorization announcement of 2018.07.06 and the authorization announcement number CN207577950U discloses a bracket for mechanical processing, which includes a lower arc-shaped rubber frame plate, the bottom of the lower arc-shaped rubber frame plate is fixedly connected to the first flat plate, the first flat plate is screwed with a first fastening bolt, the upper end of the first fastening bolt is rotatably riveted with the lower arc-shaped rubber frame plate, and an upper arc-shaped rubber frame plate is provided above the lower arc-shaped rubber frame plate, and the top of the upper arc-shaped rubber frame plate is fixedly connected to the second flat plate. When in use, the lower arc-shaped rubber frame plate cooperates with the lower surface of the arc-shaped workpiece, the first fastening bolt adjusts the curvature of the lower arc-shaped rubber frame plate, the upper arc-shaped rubber frame plate cooperates with the upper surface of the arc-shaped workpiece, the second fastening bolt adjusts the curvature of the upper arc-shaped rubber frame plate, and cooperates with the lower arc-shaped rubber frame plate to clamp and fix the arc-shaped workpiece.

[0003] Although the bracket can fix the arc-shaped workpiece, positioning the arc-shaped workpiece is relatively cumbersome, and the bracket can only fix one product; therefore, when processing the arc-shaped workpiece (such as riveting), after riveting one arc-shaped workpiece, it must be removed before positioning and riveting the second workpiece, which is inefficient. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the utility model is to provide an automatic riveting machine for front anti-collision beams which can simply position arc-shaped workpieces and improve the riveting efficiency of arc-shaped workpieces.

[0005] In order to achieve the above purpose, one of the technical solutions adopted by the utility model is: an automatic riveting machine for a front anti-collision beam, including a positioning fixture and a rotating machine table, two positioners that can rotate around their own central axes are symmetrically arranged on the rotating machine table, each of the positioners is fixed with the positioning fixture, a multi-axis manipulator is arranged on one side of the rotating machine table, and an automatic riveting gun is arranged at the end of the multi-axis manipulator, each of the positioning fixtures includes a plurality of lower support seats fixed on the positioner, and the plurality of lower support seats match the shape of the lower end surface of the arc-shaped workpiece, a connecting frame is fixedly arranged at both ends of the positioner, and an upper support seat is rotatably arranged on each of the connecting frames, and lower wedge-shaped protrusions and limiting columns are fixed on the lower support seats at both ends, and an upper wedge-shaped fixed concave block is fixed on the upper support seat; when the upper support seat is rotated to a horizontal level, the upper support seats at both ends press the two ends of the upper surface of the arc-shaped workpiece and press it on the plurality of lower support seats, the lower wedge-shaped protrusion is embedded in the upper wedge-shaped fixed concave block, and the limiting column is inserted into the arc workpiece.

[0006] The beneficial effects of the automatic riveting machine for front anti-collision beams of the utility model are:

[0007] First, the rotating machine drives the two positioners to rotate horizontally 180°. When one of the positioners moves under the automatic riveting gun, the automatic riveting gun rivets the arc-shaped workpiece on the positioner, and the other positioner is used for loading, which speeds up the riveting efficiency of the arc-shaped workpiece.

[0008] Secondly, each positioner can drive the arc-shaped workpiece to flip, and with the multi-axis manipulator, it can rivet multiple surfaces of the arc-shaped workpiece, which improves the riveting efficiency;

[0009] Thirdly, the positioning fixture uses multiple lower support seats at the bottom and upper support seats at both ends to fix the arc-shaped workpiece. The lower support seats and the upper support seats are both designed to be contoured, leaving enough space for riveting. The lower wedge-shaped protrusion and the upper wedge-shaped fixed concave block are used as the guide and positioning of the upper and lower support seats, and the limit column is used to guide and position the arc-shaped workpiece, thereby ensuring the positioning accuracy of the arc-shaped workpiece and improving the riveting accuracy. The structure is simple and the operation is easy.

[0010] Preferably, a rotating handle or an electric telescopic rod for driving the upper supporting seat to rotate is provided on the outer side of each upper supporting seat.

[0011] Preferably, the lower end surface of the upper support seat and the upper end surface of the lower support seat are both detachably connected with a pressing block via bolts. The pressing block can be replaced to match different arc-shaped workpieces.

[0012] Preferably, an adjustment shim is provided between the upper support seat and the corresponding pressing block, and between the lower support seat and the corresponding pressing block. The thickness of the adjustment shim can be adjusted according to the different thicknesses of the arc-shaped workpiece, and the adjustment shims can be continuously stacked or replaced with adjustment shims of different thicknesses.

[0013] Preferably, the adjusting gasket is provided with m evenly distributed grooves, where m is a natural number, and the upper support seat and the corresponding pressing block, and the lower support seat and the corresponding pressing block are provided with m bolt holes, and the m bolt holes correspond to m grooves. The upper support seat and the corresponding pressing block, and the lower support seat and the corresponding pressing block are all fixed by bolts passing through the bolt holes and the grooves. The positioning of the adjusting gasket is achieved by cleverly utilizing the matching setting of the bolts and the grooves, and at the same time, the bolts can also fix the adjusting gasket between the upper support seat and the corresponding pressing block, and between the lower support seat and the corresponding pressing block, killing two birds with one stone.

[0014] Preferably, the positioner is provided with two side limit plates and two end limit plates, the two side limit plates are located at the opposite outer sides of the arc-shaped workpiece, the end limit plates are located at the two ends of the arc-shaped workpiece, and the upper ends of the side limit plates and the end limit plates are inclined outward. The shape of the arc-shaped workpiece is limited by the limit plates and the end limit plates, which further improves the positioning accuracy of the arc-shaped workpiece; the upper end of each limit plate is inclined outward, which can guide the placement of the arc-shaped workpiece.

[0015] Preferably, a rivet feeding assembly is provided below the automatic riveting gun, and the rivet feeding assembly includes a rivet feeding hole fixed on the multi-axis manipulator, a rivet transfer block is provided below the rivet feeding hole, and a blanking hole is provided on the rivet transfer block. The rivet transfer block is driven to lift by a lifting cylinder, and the lifting cylinder is driven to translate by a translation cylinder, and the blanking hole can move back and forth directly below the rivet feeding hole and directly below the automatic riveting gun. When the blanking hole on the rivet transfer block is aligned with the rivet feeding hole, the blanking hole is used to receive the rivets blown by the blowing assembly one by one, and the rivets received by the rivet transfer block are moved to the bottom of the automatic riveting gun by the coordinated drive of the lifting cylinder and the translation cylinder for riveting. The rivets are fed automatically, which improves the riveting rate.

[0016] Preferably, each of the positioners comprises a support plate, which is rotatably arranged on a rotary table and driven to rotate by a first servo motor, and a second servo motor is arranged at the bottom of the rotary table, and the second servo motor drives the rotary table to rotate. The first servo motor is used to drive the support plate to rotate, that is, to drive the arc-shaped workpiece to rotate around its length direction, and the second servo motor drives the rotary table to rotate horizontally, that is, to drive the arc-shaped workpiece to rotate from one end of the rotary table to the other end in the same horizontal plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the arc-shaped workpiece (front anti-collision beam) of this embodiment;

[0018] Figure 2 is a three-dimensional diagram of this embodiment;

[0019] Figure 3 A three-dimensional diagram of the first angle of cooperation of the rotary table, positioner, rivet feeding assembly, and arc-shaped workpiece of this embodiment;

[0020] Figure 4 A second-angle stereoscopic view of the cooperation of the rotary table, positioner, rivet feeding assembly, and arc-shaped workpiece of this embodiment;

[0021] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0022] Figure 6 A three-dimensional diagram of the cooperation between a positioner and a positioning fixture in this embodiment;

[0023] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0024] In the figure:

[0025] 10. Positioning fixture; 11. Lower support seat; 12. Connecting frame; 13. Upper support seat; 14. Lower wedge-shaped protrusion; 15. Upper wedge-shaped fixed concave block; 16. Rotating handle; 17. Pressing block; 18. Adjusting gasket; 18a. Groove; 19. Bolt; 110. Limiting column; 111. Side limiting plate; 112. End limiting plate;

[0026] 20. Rotating machine table; 21. Second servo motor;

[0027] 30. Positioner; 31. Support plate;

[0028] 40. Multi-axis manipulator;

[0029] 50. Automatic riveting gun;

[0030] 60. Rivet feeding assembly; 61. Rivet feeding hole; 62. Rivet transfer block; 63. Dropping hole; 64. Lifting cylinder; 65. Translation cylinder;

[0031] 70. Arc-shaped workpiece; 71. Position to be riveted. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0033] See also Figure 1-Figure 7 As shown, the present embodiment discloses an automatic riveting machine for front anti-collision beams, including a positioning fixture 10 and a rotating platform 20. A second servo motor 21 is arranged at the bottom of the rotating platform 20, and the second servo motor 21 drives the rotating platform 20 to rotate. Two positioners 30 that can rotate around their own central axes are symmetrically arranged on the rotating platform 20. Each positioner 30 includes a support plate 31, and the support plate 31 is rotatably arranged on the rotating platform 20 and driven to rotate by the first servo motor. A positioning fixture 10 is fixed on each positioner 30, and a multi-axis manipulator 40 is arranged on one side of the rotating platform 20. An automatic riveting gun 50 is arranged at the end of the multi-axis manipulator 40. Each positioning fixture 10 includes multiple lower support seats 11 fixed on the positioner 30, and the multiple lower support seats 11 match the shape of the lower end surface of the arc-shaped workpiece 70. Connecting frames 12 are fixedly provided at both ends of the positioner 30, and an upper support seat 13 is rotatably provided on each connecting frame 12. Lower wedge-shaped protrusions 14 and limiting columns 110 are fixed on the lower support seats 11 at both ends, and upper wedge-shaped fixed recesses 15 are fixed on the upper support seat 13; when the upper support seat 13 rotates to horizontal, the upper support seats 13 at both ends press the two ends of the upper surface of the arc-shaped workpiece 70 and press it on the multiple lower support seats 11, the lower wedge-shaped protrusions 14 are embedded in the upper wedge-shaped fixed recesses 15, and the limiting columns 110 are inserted into the arc-shaped workpiece 70.

[0034] In some embodiments, a rotating handle 16 is provided on the outer side of each upper support seat 13, and the rotating handle 16 drives the upper support seat 13 to rotate. The upper support seat 13 has two states, one is nearly perpendicular to the lower support seats 11 at both ends, at this time, the arc-shaped workpiece 70 can be placed in the positioning fixture 10; the other is parallel to the lower support seats 11 at both ends, at this time, the arc-shaped workpiece 70 is in a clamped state.

[0035] In other embodiments, an electric telescopic rod may also be used to drive the upper support seat 13 to rotate.

[0036] In this embodiment, the lower end surface of the upper support seat 13 and the upper end surface of the lower support seat 11 are both detachably connected with a pressing block 17 via bolts 19 .

[0037] In addition, an adjustment shim 18 is provided between the upper support seat 13 and the corresponding pressing block 17, and between the lower support seat 11 and the corresponding pressing block 17. The adjustment shim 18 is provided with m evenly distributed grooves 18a, where m is a natural number. The upper support seat 13 and the corresponding pressing block 17, and the lower support seat 11 and the corresponding pressing block 17 are provided with m bolt holes, and the m bolt holes correspond to the m grooves 18a. The upper support seat 13 and the corresponding pressing block 17, and the lower support seat 11 and the corresponding pressing block 17 are all locked and fixed by bolts 19 passing through the bolt holes and the grooves 18a.

[0038] The positioner 30 is provided with two side limit plates 111 and two end limit plates 112. The two side limit plates 111 are located at the relatively outer sides of the arc-shaped workpiece 70, and the end limit plates 112 are located at both ends of the arc-shaped workpiece 70. The upper ends of the side limit plates 111 and the end limit plates 112 are inclined outward.

[0039] A rivet feeding assembly 60 is arranged below the automatic riveting gun 50. The rivet feeding assembly 60 includes a rivet feeding hole 61 fixed on the multi-axis manipulator 40. A rivet transfer block 62 is arranged below the rivet feeding hole 61. A blanking hole 63 is arranged on the rivet transfer block 62. The rivet transfer block is driven to rise and fall by a lifting cylinder 64. The lifting cylinder 64 is driven to translate by a translation cylinder 65. The blanking hole 63 can move back and forth directly below the rivet feeding hole 61 and directly below the automatic riveting gun 50.

[0040] The working principle of the automatic riveting machine for front anti-collision beams in this embodiment is:

[0041] One of the positioners 30 of the rotary table 20 rotates to the outside, and the operator loads the arc-shaped workpiece 70 on the positioner 30. At the same time, the other positioner 30 is located below the automatic riveting gun 50 at the end of the multi-axis manipulator 40, waiting for riveting. When loading the upper arc-shaped workpiece 70, the upper support seat 13 at both ends is rotated to open, and the operator places the arc-shaped workpiece 70 along the two side limit plates 111 and the two end limit plates 112 onto the multiple lower support seats 11. After it is in place, the upper support seat 13 is rotated, the upper wedge-shaped fixed concave block 15 is engaged with the lower wedge-shaped protrusion 14, and the limit column 110 is inserted into the arc-shaped workpiece 70. After positioning, the second servo motor 21 drives the rotary table 20 to rotate, and the positioner 30 with the arc-shaped workpiece 70 loaded is rotated to the bottom of the automatic riveting gun 50. The arc-shaped workpiece 70 originally in the riveting station is rotated to the outside, and the upper support seat 13 is rotated in the opposite direction to unload the riveted arc-shaped workpiece 70. The arc-shaped workpiece 70 on the inner positioner 30 is clamped and fixed, and the multi-axis manipulator 40 drives the automatic riveting gun 50 to rivet the riveted position 71 of the arc-shaped workpiece 70. After one side is riveted, the first servo motor drives the support plate 31 to rotate to the second side to be riveted and is located directly below the automatic riveting gun 50, waiting for riveting until all sides are riveted, and the first servo motor drives the support plate 31 to reset.

[0042] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A front anti-collision beam automatic riveting machine, comprising a positioning fixture (10), characterized in that: The invention also comprises a rotating machine platform (20), on which two positioners (30) capable of rotating around their own central axes are symmetrically arranged, each of which is fixed with the positioning fixture (10), a multi-axis manipulator (40) is arranged on one side of the rotating machine platform (20), an automatic riveting gun (50) is arranged at the end of the multi-axis manipulator (40), and each of which comprises a positioning fixture (10) fixed on the positioner (30) A plurality of lower support seats (11), wherein the plurality of lower support seats (11) match the shape of the lower end surface of the arc-shaped workpiece (70), a connecting frame (12) is fixedly provided at both ends of the positioner (30), an upper support seat (13) is rotatably provided on each of the connecting frames (12), lower wedge-shaped protrusions (14) and limiting columns (110) are fixed on the lower support seats (11) at both ends, and an upper wedge-shaped fixed concave block (15) is fixed on the upper support seat (13); When the upper support seat (13) rotates to a horizontal position, the upper support seats (13) at both ends press the two ends of the upper surface of the arc-shaped workpiece (70) and press it onto the plurality of lower support seats (11), the lower wedge-shaped protrusion (14) is embedded in the upper wedge-shaped fixed concave block (15), and the limiting column (110) is inserted into the arc-shaped workpiece (70).

2. The automatic riveting machine for front anti-collision beam according to claim 1, characterized in that: The outer side of each upper support seat (13) is provided with a rotating handle (16) or an electric telescopic rod for driving the upper support seat to rotate.

3. The automatic riveting machine for front anti-collision beam according to claim 1, characterized in that: The lower end surface of the upper support seat (13) and the upper end surface of the lower support seat (11) are both detachably connected to a pressing block (17) via bolts (19).

4. The automatic riveting machine for front anti-collision beam according to claim 3, characterized in that: Adjustment gaskets (18) are provided between the upper support seat (13) and the corresponding pressing block (17), and between the lower support seat (11) and the corresponding pressing block (17).

5. The automatic riveting machine for front anti-collision beam according to claim 4, characterized in that: The adjusting gasket (18) is provided with m evenly distributed grooves (18a), where m is a natural number. The upper support seat (13) and the corresponding pressing block (17), and the lower support seat (11) and the corresponding pressing block (17) are both provided with m bolt holes, and the m bolt holes correspond to the m grooves (18a). The upper support seat (13) and the corresponding pressing block (17), and the lower support seat (11) and the corresponding pressing block (17) are both locked and fixed by bolts (19) passing through the bolt holes and the grooves (18a).

6. The automatic riveting machine for front anti-collision beam according to claim 1, characterized in that: The positioner (30) is provided with two side limit plates (111) and two end limit plates (112); the two side limit plates (111) are located at relatively outer sides of the arc-shaped workpiece (70); the end limit plates (112) are located at two ends of the arc-shaped workpiece (70); and the upper ends of the side limit plates (111) and the end limit plates (112) are both inclined outwards.

7. The automatic riveting machine for front anti-collision beam according to claim 1, characterized in that: A rivet feeding assembly (60) is arranged below the automatic riveting gun (50), and the rivet feeding assembly (60) includes a rivet feeding hole (61) fixed on the multi-axis manipulator (40), a rivet transfer block (62) is arranged below the rivet feeding hole (61), and a blanking hole (63) is arranged on the rivet transfer block (62), the rivet transfer block is driven to rise and fall by a lifting cylinder (64), and the lifting cylinder (64) is driven to translate by a translation cylinder (65), and the blanking hole (63) can move back and forth directly below the rivet feeding hole (61) and directly below the automatic riveting gun (50).

8. The automatic riveting machine for front anti-collision beam according to claim 1, characterized in that: Each of the positioners (30) comprises a support plate (31), wherein the support plate (31) is rotatably arranged on the rotating platform (20) and driven to rotate by a first servo motor; a second servo motor (21) is arranged at the bottom of the rotating platform (20), and the second servo motor (21) drives the rotating platform (20) to rotate.

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