A dual-station positioning mechanism for cylindrical materials

Abstract

The present invention is a double-station positioning mechanism for cylindrical materials, including a mounting base. A positioning table is mounted on the mounting base, and the positioning table is inclined at a certain angle to the horizontal plane. The positioning table is provided with a first positioning groove and a second positioning groove that are parallel to each other and have a height difference. The first workpiece and the second workpiece are respectively rolled and fed into the second positioning groove and the first positioning groove through the positioning table. A push plate is slidably arranged in common at one end of the first positioning groove and the second positioning groove. The outer end of the push plate is connected to the rod end of the first cylinder. A workpiece limiting plate is fixedly connected to the positioning table at the other end of the first positioning groove and the second positioning groove. The first cylinder drives the push plate, and the push plate pushes the first workpiece and the second workpiece to contact the workpiece limiting plate to complete positioning. The present invention can be compatible with workpieces of any size in both the diameter and length directions, achieve adaptive positioning, eliminate the need to replace special positioning jigs, and has high positioning accuracy and efficiency, with a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of automated processing, and in particular to a double-station positioning mechanism for cylindrical materials. Background Art

[0002] When processing cylindrical tube parts, the tube parts need to be positioned. Due to the characteristics of tube fittings, when facing workpieces of different diameters and lengths, special positioning fixtures need to be replaced. This type of conventional positioning method is inefficient and cannot adapt to automated production.

[0003] In view of the above problems, the present invention provides a double-station positioning mechanism for cylindrical materials, which can be compatible with workpieces of any size in diameter and length directions within a certain range, achieve adaptive positioning, and eliminate the tedious work of replacing special positioning fixtures. It has high positioning accuracy and efficiency and a wide range of applications. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems existing in the prior art and provide a double-station positioning mechanism for cylindrical materials.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A double-station positioning mechanism for cylindrical materials comprises a mounting base, a positioning platform is mounted on the mounting base, and the positioning platform is inclined at a certain angle to the horizontal plane, a first positioning groove and a second positioning groove are provided on the positioning platform, which are parallel to each other and have a height difference, a first workpiece and a second workpiece are respectively rolled and dropped into the second positioning groove and the first positioning groove through the positioning platform, a push plate is slidably provided in one end of the first positioning groove and the second positioning groove, the outer end of the push plate is connected to the cylinder rod end of the first cylinder, a workpiece limiting plate is fixedly connected to the positioning platform at the other end of the first positioning groove and the second positioning groove, the push plate is driven by the first cylinder, and the push plate pushes the first workpiece and the second workpiece to contact the workpiece limiting plate to complete the positioning.

[0007] Furthermore, a plurality of bridge plate grooves and corresponding bridge plates are provided on the first positioning groove and the adjacent positioning platform located at a higher position, which are used to lift up to block the workpiece or drop through the workpiece. The plurality of bridge plates are synchronously connected to a connecting rod shaft, and one end of the bridge plate is hinged to the cylinder rod of the second cylinder. The second cylinder eccentrically pushes the bridge plate to rotate around the connecting rod shaft to lift up or drop down, so that when the first workpiece rolls through the first positioning groove, the bridge plate falls and cushions the first workpiece and rolls into the second positioning groove, and when the second workpiece rolls into the first positioning groove, it lifts up from the lower side to block the second workpiece.

[0008] Further, photoelectric switches are provided at the bottoms of the first positioning groove and the second positioning groove. When the photoelectric switch at the bottom of the second positioning groove detects the first workpiece rolling down, it feeds back to the second cylinder and drives the bridge plate to rotate and tilt up, blocking the subsequent second workpiece in the first positioning groove. After the photoelectric switch at the bottom of the first positioning groove detects the second workpiece rolling down, it feeds back to the first cylinder and drives the push plate to push the first workpiece and the second workpiece for positioning.

[0009] Further, the inner end of the push plate is connected to the push plate floating plate through an elastic structure. The push plate floating plate directly contacts and pushes the first workpiece and the second workpiece. A proximity switch is provided on the push plate. The proximity switch cooperates with the push plate floating plate. When the positioning is completed, the push plate floating plate is compressed by the reaction force to trigger the proximity switch, which feeds back to the first cylinder to stop its driving.

[0010] Further, the cross-sections of the first positioning groove and the second positioning groove are V-shaped structures, which are convenient for accommodating workpieces with any diameter within a certain range.

[0011] Further, the cylinder block of the first cylinder is installed on the mounting base through a mounting bracket. Guide assemblies are provided on both sides of the first cylinder. One end of the guide assembly is fixedly connected to the outer end of the push plate, and the guide assembly is slidably connected and matched with the mounting bracket.

[0012] Further, a cavity is provided on the positioning table. The cavity crosses the first positioning groove and the second positioning groove, for the robot gripper in the subsequent process to grab and avoid interference.

[0013] Further, one end of the cylinder block of the second cylinder is hinged to the positioning table.

[0014] Further, a workpiece baffle is provided on the positioning table at the lower side end of the second positioning groove, for blocking the first workpiece rolling into the second positioning groove.

[0015] The beneficial effects of the present invention are:

[0016] The mechanism of the present invention can, within a certain range, simultaneously accommodate workpieces with any dimensions in both the diameter and length directions, achieve self-adaptive positioning, eliminate the cumbersome work of replacing special positioning jigs, have high positioning accuracy and efficiency, and can be applied to various double-station automated assembly, automated measurement, robot part picking and placing, and robot precision machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the uncompleted positioning state of the structure of the present invention;

[0018] Figure 2 is a schematic diagram of the completed positioning state of the structure of the present invention;

[0019] Figure 3 Bridge plate and corresponding drive structure diagram of the present invention.

[0020] Description of reference numerals in the figure: 1, mounting base; 2, positioning table; 3, photoelectric switch; 4, bridge plate; 5, first workpiece; 6, first positioning groove; 7, second positioning groove; 8, workpiece baffle; 9, cavity; 10, second workpiece; 11, guiding assembly; 12, first cylinder; 13, mounting bracket; 14, push plate; 15, proximity switch; 16, push plate floating plate; 17, second cylinder; 18, workpiece limiting plate; 19, connecting rod shaft. Detailed implementation manners

[0021] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0022] As Figure 1 and Figure 2 shown, a double-station positioning mechanism for cylindrical materials includes a mounting base 1. A positioning table 2 is mounted on the mounting base 1 and is inclined at a certain angle with respect to the horizontal plane. In this embodiment, it is inclined at about 10 degrees. The positioning table 2 is provided with a first positioning groove 6 and a second positioning groove 7 that are parallel to each other and have a height difference. The first workpiece 5 and the second workpiece 10 are respectively rolled and fed into the second positioning groove 7 and the first positioning groove 6 through the positioning table 2. A push plate 14 is slidably arranged in common at one end of the first positioning groove 6 and the second positioning groove 7. The shape of the bottom of the push plate 14 matches the groove shape of the first positioning groove 6 and the second positioning groove 7. The outer end of the push plate 14 is connected to the rod end of the first cylinder 12. A workpiece limiting plate 18 is fixedly connected to the positioning table 2 at the other end of the first positioning groove 6 and the second positioning groove 7. The first cylinder 12 drives the push plate 14, and the push plate 14 pushes the first workpiece 5 and the second workpiece 10 to contact the workpiece limiting plate 18 to complete positioning.

[0023] As Figure 3 shown, a plurality of bridge plate grooves and corresponding bridge plates 4 are provided on the first positioning groove 6 at a higher position and the adjacent positioning table 2. In this embodiment, the bridge plate 4 can adopt a T-shaped plate, which is used to lift and block the workpiece or fall through the workpiece. A plurality of the bridge plates 4 are synchronously connected to a connecting rod shaft 19. One end of the bridge plate 4 is hinged to the rod of the second cylinder 17. The second cylinder 17 eccentrically pushes the bridge plate 4 to rotate and lift or fall around the connecting rod shaft 19, so that when the first workpiece 5 rolls over the first positioning groove 7, the bridge plate 4 falls and pads the first workpiece 5 to roll into the second positioning groove 7, and when the second workpiece 10 rolls into the first positioning groove 6, it lifts from the lower side to block the second workpiece 10.

[0024] The bottom of the first positioning groove 6 and the second positioning groove 7 is provided with a photoelectric switch 3. When the photoelectric switch 3 at the bottom of the second positioning groove 7 detects the rolled first workpiece 5, it feeds back to the second cylinder 17 and drives the bridge plate 4 to rotate and tilt up, blocking the subsequent second workpiece 10 in the first positioning groove 6. After the photoelectric switch 3 at the bottom of the first positioning groove 6 detects the rolled second workpiece 10, it feeds back to the first cylinder 12 and drives the push plate 14 to push the first workpiece 5 and the second workpiece 10 for positioning.

[0025] The inner end of the push plate 14 is connected to the push plate floating plate 16 through an elastic structure. In this embodiment, the elastic structure can be a spring. The push plate floating plate 16 directly contacts and pushes the first workpiece 5 and the second workpiece 10. A proximity switch 15 is provided on the push plate 14. The proximity switch 15 cooperates with the push plate floating plate 16. When the positioning is completed, the push plate floating plate 16 is compressed by the reaction force to trigger the proximity switch 15, and feeds back to the first cylinder 12 to stop its driving.

[0026] The cross-sections of the first positioning groove 6 and the second positioning groove 7 are V-shaped structures, which are convenient for adapting to workpieces with any diameter within a certain range.

[0027] The cylinder block of the first cylinder 12 is installed on the mounting base 1 through a mounting bracket 13. Guide assemblies 11 are provided on both sides of the first cylinder 12. One end of the guide assembly 11 is fixedly connected to the outer end of the push plate 14, and the guide assembly 11 is slidably inserted and matched with the mounting bracket 13.

[0028] A cavity 9 is provided on the positioning table 2. The cavity 9 crosses the first positioning groove 6 and the second positioning groove 7 and is used for the robot gripper in the subsequent process to grab and avoid interference.

[0029] One end of the cylinder block of the second cylinder 17 is hinged to the positioning table 2.

[0030] A workpiece baffle 8 is provided on the positioning table 2 at the lower side end of the second positioning groove 7 for blocking the first workpiece 5 rolling into the second positioning groove 7.

[0031] The operation process and principle of the present invention

[0032] When the system works, as Figure 1 shown, the first workpiece 5 rolls along the arrow X direction in the figure. At this time, the bridge plate 4 is in a horizontal falling state and can support the first workpiece 5 so that the first workpiece 5 will not fall when rolling over the first positioning groove 6 until it rolls into the second positioning groove 7 and is blocked by the workpiece baffle 8; after the photoelectric switch 3 provided in the second positioning groove 7 detects the first workpiece 5, as Figure 2 shown, the bridge plate 4 is tilted up by the action of the second cylinder 17, blocking the second workpiece 10 in the first positioning groove 6;

[0033] After the photoelectric switch 3 disposed in the first positioning groove 6 detects the second workpiece 10, the cylinder rod of the first cylinder 12 is pushed out along the Figure 2 arrow Y direction in the figure. Under the auxiliary guidance of the guiding component 11, the push plate 14 moves in the Y direction accordingly. When the push plate floating plate 16 contacts the first workpiece 5 and the second workpiece 10, the first workpiece 5 and the second workpiece 10 continue to move along their respective positioning grooves until the workpieces touch the workpiece limiting plate 18 on one side of the positioning table 2. The push plate floating plate 16 triggers the proximity switch 15, and the first cylinder 12 stops acting and retracts, completing a positioning action for a double-station; since the push plate floating plate 16 is installed at the front end of the push plate 14, it can adapt to workpieces of any length within a certain range;

[0034] As Figure 3 shown, there are three bridge plates 4. The second cylinder 17 acts along the Z direction, causing the bridge plates 4 to rotate along the W direction. The three bridge plates 4 move synchronously through the connecting rod shaft 19. The dotted lines in the figure are for the case of thinner workpieces. Since the cross-sections of the first positioning groove 6 and the second positioning groove 7 are V-shaped structures, they can adapt to workpieces of any diameter within a certain range, and the relative dimension D of the workpieces in the two grooves is constant, without the need for an additional mechanism to ensure the relative dimension D.

[0035] In addition, it should be noted that unless otherwise specified or indicated, the terms "first", "second", etc. in the specification are only used to distinguish each component, element, step, etc. in the specification, rather than to represent the logical relationship or sequential relationship, etc. between each component, element, step.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A double-station positioning mechanism for cylindrical materials, characterized in that It includes an installation base (1), on which a positioning table (2) is installed and the positioning table (2) is inclined at a certain angle to the horizontal plane. The positioning table (2) is provided with a first positioning groove (6) and a second positioning groove (7) that are parallel to each other and have a height difference. The first workpiece (5) and the second workpiece (10) respectively roll and blank through the positioning table (2) into the second positioning groove (7) and the first positioning groove (6). A push plate (14) is slidably arranged in common at one end of the first positioning groove (6) and the second positioning groove (7). The outer end of the push plate (14) is connected to the rod end of the first cylinder (12). A workpiece limiting plate (18) is fixedly connected to the positioning table (2) at the other end of the first positioning groove (6) and the second positioning groove (7). The first cylinder (12) drives the push plate (14), and the push plate (14) pushes the first workpiece (5) and the second workpiece (10) to contact the workpiece limiting plate (18) to complete positioning. The cylinder body of the first cylinder (12) is installed on the installation base (1) through an installation bracket (13). Guide assemblies (11) are arranged on both sides of the first cylinder (12). One end of the guide assembly (11) is fixedly connected to the outer end of the push plate (14), and the guide assembly (11) is slidably penetrated and matched with the installation bracket (13). A cavity (9) is arranged on the positioning table (2), and the cavity (9) crosses the first positioning groove (6) and the second positioning groove (7) for the robot gripper in the subsequent process to grab and avoid empty space.

2. The double-station positioning mechanism for cylindrical materials according to claim 1, wherein A number of bridge plate grooves and corresponding bridge plates (4) are arranged on the first positioning groove (6) at a higher position and the adjacent positioning table (2) for warping to block the workpiece or falling through the workpiece. The number of bridge plates (4) are synchronously connected to a connecting rod shaft (19). One end of the bridge plate (4) is hinged to the rod of the second cylinder (17). The second cylinder (17) eccentrically pushes the bridge plate (4) to rotate and warp or fall around the connecting rod shaft (19), so that when the first workpiece (5) rolls over the first positioning groove (7), the bridge plate (4) falls and pads the first workpiece (5) to roll into the second positioning groove (7), and when the second workpiece (10) rolls into the first positioning groove (6), it warps up from the low side to block the second workpiece (10).

3. The double-station positioning mechanism for cylindrical materials according to claim 2, wherein Photoelectric switches (3) are arranged at the bottoms of the first positioning groove (6) and the second positioning groove (7). When the photoelectric switch (3) at the bottom of the second positioning groove (7) detects the rolled first workpiece (5), it feeds back to the second cylinder (17) and drives the bridge plate (4) to rotate and warp, blocking the subsequent second workpiece (10) in the first positioning groove (6). After the photoelectric switch (3) at the bottom of the first positioning groove (6) detects the rolled second workpiece (10), it feeds back to the first cylinder (12) and drives the push plate (14) to push the first workpiece (5) and the second workpiece (10) for positioning.

4. The double-station positioning mechanism for cylindrical materials according to claim 3, characterized in that, The inner end of the push plate (14) is connected to the push plate floating plate (16) through an elastic structure. The push plate floating plate (16) directly contacts and pushes the first workpiece (5) and the second workpiece (10). A proximity switch (15) is provided on the push plate (14). The proximity switch (15) cooperates with the push plate floating plate (16). When positioning is completed, the push plate floating plate (16) is compressed by the reaction force to trigger the proximity switch (15), and the feedback is sent to the first cylinder (12) to stop its driving.

5. The two-station positioning mechanism for cylindrical materials according to claim 1 or 4, characterized in that The cross-sections of the first positioning groove (6) and the second positioning groove (7) are V-shaped structures, which are convenient for accommodating workpieces with any diameter within a certain range.

6. The double-station positioning mechanism for cylindrical materials according to claim 2 or 4, characterized in that One end of the cylinder block of the second cylinder (17) is hinged to the positioning table (2).

7. The double-station positioning mechanism for cylindrical materials according to claim 2 or 4, characterized in that, A workpiece baffle (8) is provided on the positioning table (2) at the low side end of the second positioning groove (7) for blocking the first workpiece (5) that rolls into the second positioning groove (7).

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