A coating head mechanism with multiple working angles

Abstract

The present invention discloses a coating head mechanism with multiple working angles, comprising: a bottom plate, which is the base part of the mechanism, and is provided with a connecting hole for docking an automated actuator; an injection shaft, which is mounted on the bottom plate through the connecting hole, and the injection port of the injection shaft is hollowly connected with the rotating head mounting hole to form a hollow through hole, and is provided with a through hole that penetrates the drive shaft. The present invention can be used in conjunction with an automatic liquid supply device with quantitative and back-suction functions to achieve accurate quantitative coating of liquid materials without dripping; it supports continuous coating operations with stable speed and high consistency in coating thickness; the coating position is precise to avoid contamination of non-coating surfaces; no bubbles are generated during the coating process, and the existing bubbles in the liquid can be crushed away by a brush head; the coating process is less affected by factors such as material density and external environment; and it can greatly improve production efficiency and have good quality stability when used with an automated actuator.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace manufacturing, and in particular to a coating head mechanism with multiple working angles. Background Art

[0002] In the field of aerospace manufacturing, there are many processes that require coating liquid materials such as adhesives and insulation layers on the inner walls and inner end faces of small workpieces. Most workpieces have deep inner cavities, small ports, and large middles. Conventional coating mechanisms are either unable to enter the cavity, or cannot act on the inner end faces, or cannot cover the entire working surface.

[0003] At present, the coating operation for this kind of workpiece is mainly done by quantitative perfusion. Liquid material is poured into the workpiece cavity manually or with the help of equipment. Then the workpiece is rotated and the material is covered on the inner wall surface and inner end face of the workpiece by the fluidity of the liquid. At the same time, the material is flattened by tools such as brushes or contoured sheets until the material is semi-solidified or solidified. The operation process is cumbersome and heavily dependent on the operator's experience and process control level, resulting in low production efficiency, poor product consistency, and affecting product quality. As the market demand for this type of product continues to increase, this manufacturing method has low efficiency and low output, and can no longer meet market demand. To this end, we propose a coating head mechanism with multiple working angles. Summary of the invention

[0004] The purpose of the present invention is to provide a coating mechanism which can change the working angle in real time in the inner cavity of a small workpiece, so as to be suitable for an automated execution system and realize automated coating operations on the inner wall and inner end face of the workpiece.

[0005] Solve various problems existing in existing quantitative perfusion methods:

[0006] Inaccurate quantitative measurement due to dripping when injecting medium and high viscosity liquid materials; a lot of accumulation at the corners of the inner wall and inner end surface; bubbles mixed in during the infusion process affect product quality; poor consistency in coating thickness; liquid material overflow and contaminate non-coated surfaces; the process is greatly affected by material density and external environmental factors; low production efficiency and poor quality stability.

[0007] To achieve the above object, the present invention provides the following technical solution: a coating head mechanism with multiple working angles, comprising:

[0008] Bottom plate, the bottom plate is the base part of the mechanism, and the bottom plate is provided with connection holes for docking the automation actuator;

[0009] A liquid injection shaft, the liquid injection shaft is installed on the bottom plate through a connecting hole, the liquid injection port of the liquid injection shaft is hollowly connected with the rotating head mounting hole to form a hollow through hole, and a through hole penetrating the drive shaft is provided;

[0010] A driving unit, wherein the driving unit is mounted on the bottom plate;

[0011] A coating head connected to the driving unit,

[0012] The coating head comprises a rotating head with a blind hole at one axial end and two radial through holes, and the needle tube and the brush head are respectively arranged on both sides of the through holes at the large end side of the rotating head.

[0013] Preferably, the driving unit includes a motor, a driving shaft, a belt, a driven shaft and a sensor which are connected and transmitted in sequence, the motor is mounted on a base plate and is coaxially connected to the driving shaft, and the driving shaft and the driven shaft are connected by a belt.

[0014] Preferably, the motor is a servo motor, and the drive shaft is coaxially connected to the rotating shaft of the servo motor.

[0015] Preferably, the small head side of the rotating head is penetrated by the injection shaft rotating head mounting hole through the sealing ring arranged on both sides of the through hole on the small head side. The rotating head is provided with a sealing ring mounting groove for installing the sealing ring, and is coaxially connected with the driven shaft. The blind hole on the axial side of the rotating head is blocked by a top screw.

[0016] Preferably, the sensor is a metal proximity sensor, and a convex head screw is radially mounted on the drive shaft, and the reference of the rotation angle is determined by sensing the position of the convex head screw on the drive shaft.

[0017] Preferably, the liquid injection port is connected to an external liquid supply device through a hose.

[0018] Preferably, the needle tube is a hollow structure, the side of the brush head connected to the rotating shaft is a solid structure, and the other side of the solid structure is bristles.

[0019] The present invention has at least the following beneficial effects:

[0020] The present invention can be used in conjunction with an automatic liquid supply device with quantitative and back-suction functions to achieve accurate quantitative coating of liquid materials without dripping; it supports continuous coating operations with stable speed and high consistency in coating thickness; the coating position is accurate to avoid contamination of non-coated surfaces; no bubbles are generated during the coating process, and existing bubbles in the liquid can be removed by a brush head; the coating process is less affected by factors such as material density and external environment; and it can be equipped with an automated actuator to greatly improve production efficiency and have good quality stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 An exploded view of the coating head of the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the rotating head of the present invention;

[0024] Figure 4 It is a plan view of the rotating head of the present invention;

[0025] Figure 5 It is a cross-sectional view of the rotating head of the present invention on the BB surface;

[0026] Figure 6 It is a stereoscopic diagram of the injection shaft of the present invention;

[0027] Figure 7 It is a plane view of the injection axis of the present invention;

[0028] Figure 8 It is a cross-sectional view of the injection axis along the AA plane of the present invention;

[0029] Fig. 9 It is an exploded view of the driving part of the present invention;

[0030] Fig.10 The workpiece and the cross-sectional view of the workpiece of the present invention;

[0031] Fig.11 It is a structural diagram of the inner wall gluing system of the present invention.

[0032] In the figure: 1-bottom plate; 2-coating head; 21-brush head; 22-rotating head; 221-through hole on the large head side; 222-seal ring mounting groove; 223-through hole on the small head side; 224-blind hole; 24-seal ring; 23-needle tube; 3-liquid injection shaft; 31-through hole; 32-mounting hole; 33-liquid injection port; 34-rotating head mounting hole; 35-hollow through hole; 4-driving unit; 41-motor; 43-belt; 44-driven shaft; 45-convex head screw; 46-driving shaft; 47-sensor; 5-external liquid supply equipment; 6-workpiece; 7-shell positioning mechanism; 8-trajectory control unit; 9-coating mechanism; 10-shell rotation mechanism; 11-continuous glue supply mechanism. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-11 The present invention provides a technical solution: a coating head 2 mechanism with multiple working angles, comprising:

[0035] Bottom plate 1, the bottom plate 1 is the base part of the mechanism, and the bottom plate 1 is provided with a connection hole for docking the automation actuator;

[0036] The injection shaft 3 is mounted on the bottom plate 1 through the connecting hole, the injection port 33 of the injection shaft 3 is hollowly connected with the rotating head mounting hole 34 to form a hollow through hole 35, and a through hole 31 is provided to penetrate the driving shaft 46;

[0037] A driving unit 4, wherein the driving unit 4 is mounted on the base plate 1;

[0038] The coating head 2 is connected to the driving unit 4.

[0039] The coating head 2 comprises a rotating head 22 with a blind hole 224 at one axial end and two radial through holes. The needle tube 23 and the brush head 21 are respectively disposed on both sides of the through hole 221 at the large end side of the rotating head 22 .

[0040] The driving unit 4 includes a motor 41 , a driving shaft 46 , a belt 43 , a driven shaft 44 and a sensor 47 which are connected and transmitted in sequence. The motor 41 is installed on the base plate 1 and is coaxially connected to the driving shaft 46 . The driving shaft 46 and the driven shaft 44 are connected by a belt 43 .

[0041] The motor 41 is a servo motor 41 , and the driving shaft 46 is coaxially connected to the rotating shaft of the servo motor 41 .

[0042] The small head side of the rotating head 22 passes through the rotating head mounting hole 34 of the injection shaft 3 through the sealing ring 24 arranged on both sides of the through hole 223 on the small head side. The rotating head 22 is provided with a sealing ring mounting groove 222 for installing the sealing ring 24, and is coaxially connected to the driven shaft 44. The axial side blind hole 224 of the rotating head 22 is blocked by a top screw.

[0043] The sensor 47 is a metal proximity sensor 47 , and a convex head screw 45 is radially mounted on the drive shaft 46 . The reference of the rotation angle is determined by sensing the position of the convex head screw 45 on the drive shaft 46 .

[0044] The liquid injection port 33 is connected to the external liquid supply device 5 through a hose.

[0045] The needle tube 23 is a hollow structure, the side of the brush head 21 connected to the rotating shaft is a solid structure, and the other side of the solid structure is bristles.

[0046] The effects that can be achieved by the present application are as follows: when the mechanism is working, the coating head 2 at the end of the injection shaft 3 is driven to rotate by the rotation transmission of the driving part 4. After the liquid material is injected through the liquid supply port, it enters the hollow hole of the injection shaft 3, the through hole 223 on the small head side of the rotating head 22, the blind hole 224 of the rotating head 22, and the through hole 221 on the large head side of the rotating head 22 in sequence, and finally flows out through the needle tube 23. Through the forward and reverse rotation, speed control, and rotation angle control of the servo motor 41, the coating head 2 can be coated at any angle in the cavity of the workpiece 6. By carrying an automated actuator, such as a manipulator, a workpiece 6 rotating device, etc., the mechanism and the workpiece 6 are relatively displaced in three-dimensional directions, and the full area coating of the inner cavity surface of the workpiece 6 can be achieved. After the liquid supply and coating of the needle tube 23 are completed, the brush head 21 can be switched according to actual needs to operate, remove bubbles that may exist, or shape the coating layer.

[0047] As another embodiment of the present scheme, the main purpose is to glue the inner wall of the automatic engine casing (for satellite). The gluing process plays an important role, even a decisive role, in the product manufacturing process, so it is particularly important to ensure the quality of gluing during the gluing process. According to the requirements of the engine inner wall gluing process, a special inner wall gluing system is designed to improve product production efficiency and reduce personnel work intensity. After preliminary research and data collection, as well as analysis of the engine casing shape and the characteristics of glue flow, it was finally decided to use the track gluing method as the central method of the research and development plan. The engine casing is placed in the rotating unit by a manipulator or an operator, and the system automatically completes the gluing of the inner wall of the casing according to the set running trajectory.

[0048] 4.1 System Structure

[0049] The structure is designed according to the appearance characteristics of the automatic engine housing. The system structure consists of a housing positioning mechanism 7, a trajectory control unit 8, a coating mechanism 9, a housing rotation mechanism 10 and a continuous glue supply mechanism 11. Fig.11 shown.

[0050] 4.2 Unit Function

[0051] 1 Shell positioning mechanism 7

[0052] The (axial) positioning of the shell is achieved without affecting the shell's rotation.

[0053] 2Trajectory control unit 8

[0054] The trajectory control unit 8 is mainly composed of a linear module that moves in the X\Y direction, and is equipped with a coating mechanism 9 for horizontal and vertical displacement.

[0055] 3 coating mechanism 9

[0056] The coating mechanism 9 is composed of a group of self-made micro brushes and a group of needle tubes 23 arranged around a rotating head 22 with a hollow structure. The rotating head 22 is floatingly matched with the injection shaft 3 through a sealing ring 24 (a through hole is provided in the tangent part). The injection shaft 3 is also a hollow structure, and the glue enters the hollow part through the injection port 33 and continues to be supplied to the hollow part of the rotating head 22 and the needle tube 23. The rotation of the rotating head 22 (the needle tube 23 and the brush) is driven by a servo motor 41 and a belt 43. The servo motor 41 is controlled by an electrical control system to achieve angle control of the needle tube 23 and the brush.

[0057] 4 Shell rotation mechanism 10

[0058] Used for positioning and self-rotation of the shell (workpiece 6). The profiling jig is installed in the hollow position of the hollow structure rotating table, and is used to place the shell (workpiece 6). The hollow rotating table rotates under the control of the servo motor 41, and then drives the shell (workpiece 6) to rotate.

[0059] 5Continuous glue supply mechanism 11

[0060] The injection piston is controlled by compressed air to squeeze the glue liquid for feeding.

[0061] 6 Shell

[0062] Small cavity parts with a small entrance and a large center.

[0063] 7Electrical control system

[0064] The electrical control system performs task and information processing, sends pulse and direction signals to the driver, completes the control of the trajectory control unit 8, realizes the expected action, and controls the glue coating signal at the same time to complete the precise glue coating.

[0065] 4.3 Main parameters

[0066] 1. Glue coating thickness: 0.5mm

[0067] 2 Gluing cycle: 25S / shot

[0068] 4.4 Workflow

[0069] The specific workflow is described as follows.

[0070] 1Put the shell into the profiling jig;

[0071] 2 The housing positioning mechanism 7 cylinder is actuated to axially fix (press) the housing;

[0072] 3. The hollow rotating mechanism starts (the shell starts to rotate);

[0073] 4 The trajectory control unit 8 moves (the coating mechanism 9 enters the housing);

[0074] 5 The liquid supply mechanism continues to operate, and begins to supply the glue material, and the glue liquid is continuously discharged from the needle tube 23 of the coating mechanism 9;

[0075] 6 The trajectory control unit 8 moves according to the preset trajectory, and synchronously, the servo motor 41 of the coating mechanism 9 adjusts the angle of the needle tube 23 in real time according to the control system instruction;

[0076] 7 After the coating is completed, the continuous liquid supply mechanism stops running and the coating is finished;

[0077] 8 Switch to the brush for operation (if necessary), repeat the gluing track to level the glue and remove the surface bubbles;

[0078] 9 The trajectory control unit 8 is reset (the coating mechanism 9 exits the housing);

[0079] 10 coating mechanism 9 servo motor 41 (needle tube 23 returns to the initial angle);

[0080] 11 The hollow rotating motor 41 stops (the housing stops rotating);

[0081] 12 The cylinder of the housing positioning mechanism 7 is reset and the housing is released;

[0082] 13 Take out the shell after coating;

[0083] 14 Return to step 1 and repeat the process

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating head mechanism with multiple working angles, characterized in that: include: A bottom plate (1), the bottom plate (1) being the base portion of the mechanism, and the bottom plate (1) being provided with a connection hole for docking with the automated actuator; An injection shaft (3), the injection shaft (3) being mounted on the bottom plate (1) via a mounting hole (32); the injection port (33) of the injection shaft (3) and the rotating head mounting hole (34) being hollow and connected to form a hollow through hole (35); and a through hole (31) penetrating the drive shaft (46) is provided on the injection shaft (31); A driving unit (4), wherein the driving unit (4) is mounted on the base plate (1); A coating head (2), wherein the coating head (2) is connected to a driving unit (4); The coating head (2) comprises a rotating head (22) having a blind hole (224) at one axial end and two radial through holes, and the needle tube (23) and the brush head (21) are respectively placed on both sides of the through hole (221) on the large end side of the rotating head (22); The driving unit (4) comprises a motor (41), a driving shaft (46), a belt (43), a driven shaft (44) and a sensor (47) which are connected and transmitted in sequence, the motor (41) being mounted on the bottom plate (1) and being coaxially connected to the driving shaft (46), and the driving shaft (46) and the driven shaft (44) being connected via a belt (43); The small end side of the rotating head (22) passes through the rotating head mounting hole (34) on the injection shaft (3) and is sealed by a sealing ring (24). The rotating head (22) is provided with a sealing ring mounting groove (222) for mounting the sealing ring (24) and is coaxially connected to the driven shaft (44). The axial side blind hole (224) of the rotating head (22) is blocked by a top screw.

2. A coating head mechanism with multiple working angles according to claim 1, characterized in that: The motor (41) is a servo motor (41), and the drive shaft (46) is coaxially connected to the rotation shaft of the servo motor (41).

3. A coating head mechanism with multiple working angles according to claim 2, characterized in that: The sensor (47) is a metal proximity sensor (47), and a convex head screw (45) is radially mounted on the drive shaft (46). The reference of the rotation angle is determined by sensing the position of the convex head screw (45) on the drive shaft (46).

4. The coating head mechanism with multiple working angles according to claim 1, characterized in that: The liquid injection port (33) is connected to an external liquid supply device (5) via a hose.

5. The coating head mechanism with multiple working angles according to claim 1, characterized in that: The needle tube (23) is a hollow structure, the side of the brush head (21) connected to the rotating shaft is a solid structure, and the other side of the solid structure is bristles.

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