Laser rust removal mechanism for rod-shaped workpiece

Abstract

The present invention provides a rod-shaped workpiece laser rust removal mechanism, which belongs to the technical field of automation equipment. It includes a frame, a smoke removal hood fixed on the frame, a rust removal laser head fixedly arranged on the frame, a first servo motor with a shell fixed on the frame, a mounting plate fixed on the output shaft of the first servo motor, a workpiece clamping seat rotatably connected to the mounting plate, and a second servo motor with a shell fixed on the mounting plate, wherein the output shaft of the second servo motor is fixedly connected to the workpiece clamping seat; the smoke removal hood is connected to the air inlet end of an air pump. The present invention has the advantages of high rust removal efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automation equipment and relates to a laser rust removal mechanism for a rod-shaped workpiece. Background Art

[0002] There are rod-shaped workpieces in the components with valve columns, such as the inkjet valve column of a printing machine and the flow valve. During the processing of such rod-shaped workpieces, it is necessary to first remove rust (or paint film) from the corresponding areas of the end face and the peripheral surface of the rod-shaped workpiece in order to facilitate the subsequent electroplating of the workpiece.

[0003] The efficiency of automated production is the core pursuit of automated equipment. Based on the fact that the waiting time of the robot in the existing technology is long, the utilization rate of the robot is low. This solution makes a multi-faceted improvement design to the rod-shaped workpiece rust removal production line to improve efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a rod-shaped workpiece laser rust removal mechanism in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to improve the efficiency of workpiece disassembly and assembly.

[0005] The object of the present invention can be achieved through the following technical solutions: a rod-shaped workpiece laser rust removal mechanism, characterized in that it includes a frame, a smoke removal hood fixed on the frame, a rust removal laser head fixedly arranged on the frame, a first servo motor with a shell fixed on the frame, a mounting plate fixed on the output shaft of the first servo motor, a workpiece clamping seat rotatably connected to the mounting plate and a second servo motor with a shell fixed on the mounting plate, the output shaft of the second servo motor is fixedly connected to the workpiece clamping seat; the smoke removal hood is connected to the air inlet end of an air pump;

[0006] The workpiece clamping seat includes a workpiece insertion hole adapted to the workpiece to be processed and an expansion groove located in the middle of the workpiece insertion hole, and a plurality of first clamping assemblies and a plurality of second clamping assemblies corresponding to the first clamping assemblies are evenly distributed in the circumferential direction of the outer side of the expansion groove, and the first clamping assembly includes a first swing arm rotatably connected to the bottom surface of the expansion groove and a first avoidance opening located on the outer side of the expansion groove, the inner end of the first swing arm is a first clamping part, the outer end of the first swing arm is a first counterweight part, the first counterweight part is located in the first avoidance opening, a first spring sheet is fixedly provided on the first swing arm to drive the first clamping part away from the workpiece insertion hole, the inner end of the first spring sheet is fixed on the first swing arm, the other end of the first swing arm abuts against the inner wall of the first avoidance opening, and an obtuse angle is formed between the first counterweight part and the first clamping part;

[0007] The second clamping assembly includes a second swing arm rotatably connected to the bottom surface of the expanded groove and a second avoidance opening located on the outside of the expanded groove, the inner end of the first swing arm is a second clamping part, the outer end of the second swing arm is a second counterweight part, the second counterweight part is located in the second avoidance opening, a second spring sheet is fixedly provided on the second swing arm to drive the second clamping part away from the workpiece insertion hole, the inner end of the second spring sheet is fixed on the second swing arm, the other end of the second swing arm abuts against the inner wall of the second avoidance opening, and an obtuse angle is formed between the second counterweight part and the second clamping part; the first clamping assembly and the corresponding second clamping assembly are symmetrically distributed along the radial line of the workpiece insertion hole.

[0008] When rust removal is performed on the end face of the workpiece perpendicular to the axis, the first servo motor controls the mounting plate to swing slightly, that is, the mounting plate and the second servo motor synchronously swing back and forth around the axis of the output shaft of the first servo motor, and the swing amplitude is related to the size of the rust removal end face of the workpiece, and the swing amplitude is greater than the diameter of the maximum end face of the workpiece; the end face of the workpiece to be rust removed is located below the rust removal laser head, and through the swing and rotation of the workpiece, the action point of the rust removal laser head can cover all end faces of the workpiece, including end faces of different diameters.

[0009] When the circumference of the workpiece needs to be derusted, the first servo motor controls the workpiece to be placed horizontally while still keeping the workpiece swinging, and the second servo motor controls the workpiece to rotate. The laser spot can cover the entire area to be derusted in the axial direction of the workpiece during the swinging process.

[0010] In order to improve the assembly efficiency of the workpiece to be derusted on the workpiece clamping seat and the removal efficiency of the workpiece after derusting, the present solution provides a centrifugal force automatic clamping mechanism on the workpiece clamping seat.

[0011] When there is acceleration during the rotation of the workpiece clamping seat, the workpiece can be automatically clamped. Taking the clockwise accelerated rotation of the workpiece clamping seat as an example, the first counterweight portion presses the first spring leaf due to the inertia force, and the first clamping portion presses the outer wall surface of the workpiece inserted in the workpiece insertion hole, and the workpiece is automatically clamped. When the workpiece clamping seat is in a uniform motion state, the first clamping portion and the second clamping portion both clamp the workpiece. When the workpiece clamping seat stops, due to the action of the first spring leaf and the second spring leaf, the first clamping portion and the second clamping portion retract into the expansion groove, away from the workpiece insertion hole or out of contact with the workpiece, and the workpiece can be easily inserted or removed.

[0012] During the uniform rotation of the workpiece clamping seat, due to the centrifugal force, the first counterweight and the second counterweight tend to swing to the radial position of the workpiece clamping seat, so that the first swing arm and the second swing arm can swing to a state of clamping the workpiece to be processed.

[0013] When the workpiece clamping seat rotates with acceleration, centrifugal force also exists on the first counterweight part and the second counterweight part. However, since the rotation speed is relatively slow, the inertia force is the main reason for driving the workpiece to be processed to be clamped.

[0014] The workpiece is taken out when it is in a vertical state and the workpiece clamping seat stops rotating, and the workpiece is inserted when the opening of the workpiece insertion hole faces upward and the workpiece clamping seat stops rotating.

[0015] Since the present solution relies on the rotation and swinging of the workpiece to expand the coverage of laser rust removal, if the workpiece is not effectively clamped, it is easy to fall out of the workpiece insertion hole. However, if a traditional clamping mechanism is used, there will be problems with difficulty in inserting and removing the workpiece, or at least the efficiency of loading and removing the workpiece will be low due to the need for locking and unlocking actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the rod-shaped workpiece high-efficiency rust removal production line.

[0017] Figure 2 This is a top view of the rod-shaped workpiece high-efficiency rust removal production line.

[0018] Figure 3 This is an exploded view of the rust removal station.

[0019] Figure 4 It is a schematic diagram of the structure of the workpiece to be derusted (this scheme takes the workpiece with this structure as an example).

[0020] Figure 5 yes Figure 1 Schematic diagram of the structure after removing the top frame plate.

[0021] Figure 6 It is a structural schematic diagram of a rust removal laser head, a fume removal hood and a workpiece clamping seat.

[0022] Figure 7 It is a schematic diagram of the structure when multiple storage trays are stacked.

[0023] Figure 8 Schematic diagram of the structure of the workpiece electroplating tray.

[0024] Fig. 9 It is a schematic diagram of the structure when the workpiece clamping mount stops rotating.

[0025] Fig.10 It is a schematic diagram of the structure when the workpiece clamping seat has rotational acceleration (the direction of the arrow is the direction of acceleration).

[0026] Fig.11 It is a schematic diagram of the structure when the workpiece clamping mount rotates at a uniform speed.

[0027] In the figure, 1, frame; 21, node manipulator; 22, tray loading station; 23, empty tray unloading station; 24, tray fixed point station; 25, pick-and-place manipulator; 26, rust removal station; 27, unloading and loading station; 31, plug-in plate; 32, punching; 33, connecting rod; 41, smoke hood; 42, rust removal laser head; 43, first servo motor; 44, mounting plate; 45, workpiece clamping seat; 46, second servo motor; 47, vacuum pump; 51, workpiece plug hole; 52, slot expansion; 61, first swing arm; 62, first avoidance; 63, first clamping part; 64, first counterweight part; 65, first spring leaf; 71, second swing arm; 72, second avoidance; 73, second clamping part; 74, second counterweight part; 75, second spring leaf; 8, workpiece electroplating and loading; 9, workpiece to be processed. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figure 1-Figure 8 As shown, the rod-shaped workpiece efficient rust removal production line includes a frame 1, a node manipulator 21, a tray feeding station 22, an empty tray discharging station 23 and two rust removal mechanisms, the rust removal mechanism includes a tray fixed-point station 24, a pick-and-place manipulator 25, a plurality of rust removal stations 26 and at least one discharging and loading station 27, the two tray fixed-point stations 24, the tray feeding station 22 and the empty tray discharging station 23 are circumferentially distributed on the outside of the node manipulator 21; the node manipulator 21 can grab the storage tray loaded with workpieces on the tray feeding station 22 to the tray fixed-point station 24, and grab the empty storage tray of the tray fixed-point station 24 to the empty tray discharging station 23; the pick-and-place manipulator 25 can grab the workpieces on the storage tray on the tray fixed-point station 24 one by one to the rust removal station 26, and take the workpieces whose rust is completed to the discharging and loading station 27.

[0030] Since laser rust removal takes a little longer, ranging from several seconds to tens of seconds, in order to shorten the waiting time of the pick-and-place robot 25 and improve processing efficiency, each pick-and-place robot 25 is responsible for picking up and placing workpieces in multiple rust removal mechanisms. First, a workpiece is grabbed from the carrier fixed-point station 24 to each rust removal station 26, and the rust-removed workpiece is grabbed at the rust removal station 26 where the workpiece is first placed to the unloading and loading station 27. This process is repeated, so that the pick-and-place robot 25 is in a coherent, continuous and non-waiting working state.

[0031] The node robot 21 is responsible for placing the storage trays of the two rust removal mechanisms carrying the workpieces to be rusted from the tray loading station 22 to the tray fixed point station 24, and is also responsible for transferring the empty storage trays from the tray fixed point station 24 to the empty tray unloading station 23.

[0032] Furthermore, the storage tray includes a plurality of stacked rectangular plug plates 31, each of which is provided with a plurality of through holes 32 adapted to the workpiece 9 to be processed, and there is a spacing between adjacent plug plates 31. Each plug plate 31 is fixedly connected by a plurality of connecting rods 33, and the upper end of the connecting rod 33 has a positioning hole extending above the plug plate 31 on the top layer, and the lower end of the connecting rod 33 has a positioning head extending below the plug plate 31 on the bottom layer, and the positioning head is adapted to the positioning hole.

[0033] This storage tray can position the workpiece relatively accurately and the workpiece can be taken and placed smoothly.

[0034] Furthermore, the rust removal station 26 is equipped with a smoke removal hood 41 fixed on the frame 1, a rust removal laser head 42 fixedly arranged on the frame 1, a first servo motor 43 whose shell is fixed on the frame 1, a mounting plate 44 fixed on the output shaft of the first servo motor 43, a workpiece clamping seat 45 rotatably connected to the mounting plate 44 and a second servo motor 46 whose shell is fixed on the mounting plate 44, and the output shaft of the second servo motor 46 is fixedly connected to the workpiece clamping seat 45; the smoke removal hood 41 is connected to the air inlet end of an exhaust pump 47.

[0035] When rust removal is performed on the end face of the workpiece perpendicular to the axis, the first servo motor 43 controls the mounting plate 44 to swing slightly, that is, the mounting plate 44 and the second servo motor 46 synchronously swing back and forth around the axis of the output shaft of the first servo motor 43, and the swing amplitude is related to the size of the rust removal end face of the workpiece, and the swing amplitude is greater than the diameter of the largest end face of the workpiece; the end face of the workpiece to be rust removed is located below the rust removal laser head 42, and through the swinging and rotation of the workpiece, the action point of the rust removal laser head 42 can cover all end faces of the workpiece, including end faces of different diameters.

[0036] When the circumference of the workpiece needs to be derusted, the first servo motor 43 controls the workpiece to be placed horizontally while still keeping the workpiece swinging, and the second servo motor 46 controls the workpiece to rotate. The laser spot can cover the entire area to be derusted in the axial direction of the workpiece during the swinging process.

[0037] Each rust removal mechanism is equipped with three rust removal stations 26 .

[0038] Each rust removal mechanism is equipped with two material discharging and loading trays 27 , and a workpiece electroplating tray 8 is provided at the material discharging and loading trays 27 .

[0039] There are multiple rubber hoses on the workpiece electroplating tray 8, and the rubber hoses have conductive holes adapted to the workpieces. The inner walls of the conductive holes have spring columnar conductive contacts. The workpieces can be inserted into the conductive holes to prevent loosening, and the workpieces inserted into the workpiece electroplating tray 8 can be directly electroplated.

[0040] In addition, as an adaptive setting, the longitudinal distance between the rust removal laser head 42 and the workpiece clamping seat 45 is adjusted using a straight line module; a lifting mechanism is provided on the tray loading station 22 so that the storage tray can be moved longitudinally to a height suitable for the node manipulator 21.

[0041] The workpiece clamping seat 45 includes a workpiece insertion hole 51 adapted to the workpiece 9 to be processed and an expansion groove 52 located in the middle of the workpiece insertion hole 51. A plurality of first clamping assemblies and a plurality of second clamping assemblies corresponding to the first clamping assemblies are evenly distributed in the circumferential direction on the outer side of the expansion groove 52. The first clamping assembly includes a first swing arm 61 rotatably connected to the bottom surface of the expansion groove 52 and a first avoidance opening 62 located on the outer side of the expansion groove 52. The inner end of the first swing arm 61 is a first clamping portion 63, and the outer end of the first swing arm 61 is a first counterweight portion 64. The first counterweight portion 64 is located in the first avoidance opening 62. A first spring leaf 65 is fixedly provided on the first swing arm 61 to drive the first clamping portion 63 away from the workpiece insertion hole 51. The inner end of the first spring leaf 65 is fixed on the first swing arm 61, and the other end of the first swing arm 61 abuts against the inner wall of the first avoidance opening 62. There is an obtuse angle between the first counterweight portion 64 and the first clamping portion 63.

[0042] The second clamping assembly includes a second swing arm 71 rotatably connected to the bottom surface of the expansion groove 52 and a second avoidance opening 72 located on the outside of the expansion groove 52. The inner end of the first swing arm 61 is the second clamping portion 73, and the outer end of the second swing arm 71 is the second counterweight portion 74. The second counterweight portion 74 is located in the second avoidance opening 72. A second spring leaf 75 is fixedly provided on the second swing arm 71 to drive the second clamping portion 73 away from the workpiece insertion hole 51. The inner end of the second spring leaf 75 is fixed on the second swing arm 71, and the other end of the second swing arm 71 abuts against the inner wall of the second avoidance opening 72. The second counterweight portion 74 forms an obtuse angle with the second clamping portion 73. The first clamping assembly and the corresponding second clamping assembly are symmetrically distributed along the radial line of the workpiece insertion hole 51.

[0043] In order to improve the efficiency of assembling the workpiece to be derusted on the workpiece clamping seat 45 and the efficiency of removing the workpiece after derusting, the present solution provides a centrifugal force automatic clamping mechanism on the workpiece clamping seat 45 .

[0044] When there is acceleration during the rotation of the workpiece clamping seat 45, the workpiece can be automatically clamped. For example, the workpiece clamping seat 45 rotates clockwise with acceleration. Fig.10 As shown, the first counterweight 64 compresses the first spring 65 due to the inertial force, and the first clamping portion 63 presses the outer wall of the workpiece inserted in the workpiece insertion hole 51, and the workpiece is automatically clamped. When the workpiece clamping seat 45 is in a uniform motion state, as shown in FIG. Fig.11 As shown, the first clamping portion 63 and the second clamping portion 73 both clamp the workpiece. When the workpiece clamping seat 45 stops, as shown in FIG. Fig. 9As shown, due to the action of the first spring piece 65 and the second spring piece 75, the first clamping portion 63 and the second clamping portion 73 retract into the expansion groove 52, away from the workpiece insertion hole 51 or out of contact with the workpiece, and the workpiece can be easily inserted or removed.

[0045] During the uniform rotation of the workpiece clamping seat 45, due to the centrifugal force, the first counterweight portion 64 and the second counterweight portion 74 tend to swing to the radial position of the workpiece clamping seat 45, so that the first swing arm 61 and the second swing arm 71 can swing to a state of clamping the workpiece 9 to be processed.

[0046] When the workpiece clamping seat 45 rotates with acceleration, centrifugal force also exists on the first counterweight portion 64 and the second counterweight portion 74 . However, since the rotation speed is relatively slow, the inertia force is the main reason for driving the workpiece 9 to be processed to be clamped.

[0047] The workpiece is taken out when it is in a vertical state and the workpiece clamping seat 45 stops rotating, and the workpiece is inserted when the opening of the workpiece insertion hole 51 faces upward and the workpiece clamping seat 45 stops rotating.

[0048] Since the present solution relies on the rotation and swinging of the workpiece to expand the coverage of laser rust removal, if the workpiece is not effectively clamped, it is easy to fall out of the workpiece insertion hole 51. However, if a traditional clamping mechanism is used, there will be problems with difficulty in inserting and removing the workpiece, or at least the efficiency of loading and removing the workpiece will be low due to the need for locking and unlocking actions.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A laser rust removal mechanism for a rod-shaped workpiece, characterized in that: The invention comprises a frame (1), a rust removal laser head (42) fixedly arranged on the frame (1), a first servo motor (43) whose shell is fixed on the frame (1), a mounting plate (44) fixed on the output shaft of the first servo motor (43), a workpiece clamping seat (45) rotatably connected to the mounting plate (44), and a second servo motor (46) whose shell is fixed on the mounting plate (44), wherein the output shaft of the second servo motor (46) is fixedly connected to the workpiece clamping seat (45); The workpiece clamping seat (45) comprises a workpiece insertion hole (51) adapted to the workpiece (9) to be processed and an expansion groove (52) located in the middle of the workpiece insertion hole (51); a plurality of first clamping assemblies and a plurality of second clamping assemblies corresponding to the first clamping assemblies are evenly distributed in the circumferential direction on the outer side of the expansion groove (52); the first clamping assembly comprises a first swing arm (61) rotatably connected to the bottom surface of the expansion groove (52) and a first avoidance opening (62) located on the outer side of the expansion groove (52); the inner end of the first swing arm (61) is a first clamping portion (63) ), the outer end of the first swing arm (61) is a first counterweight (64), the first counterweight (64) is located in the first avoidance opening (62), a first spring leaf (65) is fixedly provided on the first swing arm (61) for driving the first clamping portion (63) away from the workpiece insertion hole (51), the inner end of the first spring leaf (65) is fixed on the first swing arm (61), the other end of the first swing arm (61) is against the inner wall of the first avoidance opening (62), and an obtuse angle is formed between the first counterweight (64) and the first clamping portion (63); The second clamping assembly comprises a second swing arm (71) rotatably connected to the bottom surface of the expansion groove (52) and a second avoidance opening (72) located outside the expansion groove (52); the inner end of the first swing arm (61) is a second clamping portion (73); the outer end of the second swing arm (71) is a second counterweight portion (74); the second counterweight portion (74) is located in the second avoidance opening (72); a second spring leaf (75) is fixedly arranged on the second swing arm (71) for driving the second clamping portion (73) away from the workpiece insertion hole (51); the inner end of the second spring leaf (75) is fixed on the second swing arm (71); the other end of the second swing arm (71) abuts against the inner wall of the second avoidance opening (72); an obtuse angle is formed between the second counterweight portion (74) and the second clamping portion (73); the first clamping assembly and the corresponding second clamping assembly are symmetrically distributed along the radial line of the workpiece insertion hole (51).

2. According to claim 1, a rod-shaped workpiece laser rust removal mechanism is characterized in that: It also includes a smoke hood (41) fixed on the frame (1), and the smoke hood (41) is connected to the air inlet end of an air pump (47).

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