Automatic blowing device for automobile front cover outer plate mold

Abstract

The utility model discloses an automatic blowing device for automobile front cover outer plate mould, including the device ontology of setting in the lifting mechanism department of front cover outer plate module middle, the device ontology and gripper robot cooperation use, including with the guide rail of gripper robot track parallel arrangement, the outside installation of guide rail has as the reversing valve of gas path distribution pivot, and the mechanical valve is connected through the air pipe with the installation in the inside of guide rail, the mechanical valve is at least three, and according to the equal interval distribution of gripper robot's beat order on the guide rail, and the air outlet of each mechanical valve is connected with the air -jet mechanism for the directional blowing of front cover outer plate mould surface zinc powder through the air pipe, the utility model discloses the movement track of gripper robot automatic trigger directional blowing cleaning function, eliminates the artificial stop line cleaning link, saves the working hours, improves the cleanliness simultaneously.

Description

Technical Field

[0001] This utility model relates to an automatic air blowing device, specifically an automatic air blowing device for an automotive front hood outer panel mold, belonging to the field of automotive manufacturing technology. Background Technology

[0002] Currently, in the automotive body manufacturing industry, the front hood edge-wrapping process generally employs mechanical or hydraulic mold structures, achieving the pressing connection between the outer and inner panels through two processes: pre-bending and final bending. This process mainly relies on the precise fit of the mold and the action of high pressure to gradually bend the edge of the outer panel and finally cover the inner panel, forming an edge-wrapping structure with sufficient strength and sealing. The front hood snap-fit ​​mold operation process is as follows: the press drives the upper mold downwards, contacting the mechanical mechanism during the descent. The mechanical mechanism drives the pre-bending cutter along a set trajectory, pre-bending the outer panel of the front hood to 45°. The upper mold continues to descend, further bending the already pre-bent outer panel to cover the inner panel of the front hood. In existing technologies, during the pre-bending of the galvanized outer panel by the mold and the bending process by the main bending cutter, tensile stress occurs on the outer side of the material, causing the galvanized layer to peel off. Over time, this accumulated inside the mold leads to dents and scratches after snap-fitting.

[0003] Therefore, the following specific problems exist in the existing technology: Firstly, production efficiency is low: due to the lack of an automatic cleaning device in the mold structure, the production line must be stopped periodically, and manual cleaning is required to deal with zinc powder accumulation. This cleaning method requires interrupting the normal production process, leading to a decrease in production efficiency. The root cause is that the existing mold structure design does not consider online cleaning functionality, making continuous cleaning operations during the production process impossible.

[0004] Secondly, insufficient quality stability: Due to the complex functional structure of the front cover outer panel mold (lower mold), there are many dead corners, making thorough cleaning difficult during continuous production, leading to the continuous accumulation of impurities such as zinc powder. Lacking an effective online cleaning system, residual zinc powder inside the mold cavity is forcibly pressed into the surface of the sheet metal during high-pressure edge wrapping, forming quality defects such as dents and scratches. Currently, these surface defects are generally repaired by manual grinding, which not only increases additional labor costs and production time but also directly affects the yield of the final product due to the instability of repair quality. Therefore, there is an urgent need to design a tooling to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an automatic air blowing device for automobile front cover outer panel mold that is reasonably structured and easy to use.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an automatic air blowing device for an outer panel mold of an automobile front cover, including a device body set at a lifting mechanism in the middle of the outer panel module of the front cover, the device body is used in conjunction with a gripper robot, including a guide rail (3) arranged parallel to the track of the gripper robot, a reversing valve (13) serving as the air distribution center is installed on the outside of the guide rail, the reversing valve is connected to a mechanical valve installed on the inside of the guide rail through an air pipe, the mechanical valve is at least three, and is evenly distributed on the guide rail according to the rhythm sequence of the gripper robot; and the air outlet of each mechanical valve is connected to a jetting mechanism for directional blowing of zinc powder on the surface of the outer panel mold of the front cover through an air pipe.

[0007] Furthermore, the guide rail is fixed to the outside of the robot guide rail, and is a square hollow steel section, arranged parallel to the robot guide rail.

[0008] Furthermore, each mechanical valve has a mounting hole on its seat, which is then fixedly connected to the guide rail by fasteners installed in the mounting hole.

[0009] Furthermore, the mechanical valve is a one-way valve to construct a one-way triggering logic, and the reversing valve is a two-position five-way reversing valve.

[0010] Furthermore, when the electromagnet is de-energized, the valve core of the two-position five-way directional valve remains in its normal position, allowing compressed air to enter the rodless chamber of the cylinder from port P through port A, and to exhaust from port B through port S, causing the piston to retract. When the electromagnet is energized, the valve core switches to another working position, with port P now connected to port B, and port A exhausting through port R. Air enters the rod chamber of the cylinder and exhausts from the rodless chamber, causing the piston to extend. Thus, the reciprocating direction control of the pneumatic actuator is achieved through the two-position switching of the valve core. Here, P is connected to the air source, A and B are connected to the mechanical valve, and R and S are the air outlets connected to the atmosphere.

[0011] Furthermore, a base (9) is installed on the track of the gripper robot, and a U-shaped bracket (8) for switching the mechanical valve is connected to the base. The U-shaped bracket includes bracket bodies symmetrically arranged on both sides of the base. The bottom of the bracket body is connected to the base through a through pin, and the top of the bracket body is connected to an arc-shaped plate that contacts the handwheel of the mechanical valve. Furthermore, the U-shaped bracket is mounted on the base and is flush with the installation height of the mechanical valve, so that the U-shaped bracket can more accurately open and close the mechanical valve during operation.

[0012] Furthermore, the jetting mechanism includes a lifting bracket (2) installed on the lifting mechanism of the front cover outer plate mold and a nozzle (10) fixed on the lifting bracket. The nozzle (10) is connected to the air pipe through a pagoda connector. The pagoda connector is screwed into the installation interface of the nozzle, and the air pipe and the pagoda connector are fastened to the lifting bracket by a clamp. This makes the nozzle and the lifting bracket more securely fixed and the connection tighter. The lifting bracket ensures the installation position of the nozzle, thereby realizing the fixed sweeping and purging function.

[0013] Furthermore, there are at least six nozzles, all of which are fan-shaped nozzles with a spray angle of 120°. The fan-shaped spray achieves directional blowing and maximizes full coverage of the front cover outer panel mold.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. Cleaning is automatically triggered by the robot's motion trajectory, achieving zero production interruption, eliminating manual cleaning stops, and saving labor time. 2. Precise timing control ensures that each front cover is purged before being fastened, reducing zinc powder residue by 98%, greatly reducing dents and bumps, and lowering the defect rate from 12% to 1%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the gas path of this utility model.

[0017] Figure description: 1-Front cover outer panel mold, 2-Lifting bracket, 3-Guide rail, 4-Robot guide rail, 5-First mechanical valve, 6-Second mechanical valve, 7-Third mechanical valve, 8-U-shaped bracket, 9-Base, 10-Nozzle, 13-Reversing valve. Detailed Implementation

[0018] This embodiment provides an automatic air blowing device for a car front hood outer panel mold. It is used in the first step of the front hood inner and outer panel fastening process, that is, during the time when the front hood outer panel is placed in the front hood outer panel mold, the automatic air blowing device of this embodiment cleans the front hood outer panel mold, blows away the zinc powder on the surface, and then the front hood outer panel is put down by a gripper robot and fastened with the inner panel to ensure that there are no particles on the surface of the outer panel.

[0019] Structure as Figure 1 and Figure 2 As shown, it consists of a lifting bracket 2, a nozzle 10, a first mechanical valve 5, a second mechanical valve 6, a third mechanical valve 7, a guide rail 3, a robot guide rail 4, a U-shaped bracket 8, a base 9, and a reversing valve 13.

[0020] The lifting bracket is installed at the lifting mechanism of the front hood outer panel mold 1, and together with the nozzles 10 installed thereon, forms an air jet mechanism. In this embodiment, six nozzles are provided, evenly distributed on the lifting bracket. Air pipes are connected to the bottom of the nozzles. The nozzle and air pipe are connected by a pagoda connector. The pagoda connector is screwed into the nozzle's mounting interface, and the air pipe and pagoda connector are fastened to the lifting bracket by a clamp. The air pipe is connected to the first, second, and third mechanical valves and the reversing valve, respectively.

[0021] In this embodiment, the guide rail is a three-meter-long square hollow steel section, laid parallel to the outer side of the gripper robot's guide rail 4. The first, second, and third mechanical valves are installed at equal intervals on the inner side of the guide rail, with their positions arranged according to the gripper robot's movement trajectory. In this embodiment, the three mechanical valves are one-way valves, spaced 60cm apart, with mounting holes on their seats, and are fixed to the inner side of the guide rail with bolts. A reversing valve is installed on the outer side of the guide rail, serving as the air distribution center, dynamically switching the airflow direction based on the trigger signal from the mechanical valves.

[0022] Both the gripper robot and the U-shaped bracket are mounted on the base 9 of the robot guide rail, and are driven by the base to reciprocate along the robot guide rail. The U-shaped bracket includes bracket bodies symmetrically arranged on both sides of the base. The bottom of the bracket body is connected to the base through a through pin, and the top of the bracket body is connected to an arc-shaped plate that contacts the roller of the mechanical valve stem. The U-shaped bracket is flush with the installation height of the mechanical valve.

[0023] The working principle of this implementation is as follows: Based on the principle of air circuit coordinated control triggered by robot motion trajectory, a position sensing network is constructed through gripper robot, robot guide rail, mechanical valve and reversing valve, so that the trigger position of each mechanical valve establishes a strict time sequence correspondence with the working rhythm of the robot, and controls the operation sequence of gripper robot, front cover outer plate mold and air blowing device into a set of processes, which are determined only by the installation position of mechanical valve and the speed of robot movement. The system uses reversing valve as the air circuit distribution center, and dynamically switches the air circuit direction according to the trigger signal of mechanical valve: when the robot moves forward and contacts the first mechanical valve, the reversing valve pre-charges the second mechanical valve; when it reaches the position of the second mechanical valve, high pressure gas is sprayed through the suspended nozzle to form a directional blowing flow field to remove zinc powder on the surface of the front cover outer plate mold; after passing the position, the valve is automatically closed to ensure that the fastening process is not interfered with. The robot continues to move forward to trigger the third mechanical valve to reset the reversing valve, and when it returns, a one-way trigger logic is constructed, and the initial air circuit state is reconstructed when it reaches the mechanical valve (5). This innovative principle directly converts robot displacement into pneumatic control signals, achieving precise synchronization between production cycle and cleaning process through a hard real-time control chain of "displacement-trigger-pneumatic path" (response time ≤ 0.2s).

[0024] The working process of this embodiment is as follows: This embodiment is applied to the first step of the front cover inner and outer panels and the inner panel fastening process. The outer mold of the front cover is fixed on the work station. In the initial state, the gripper robot is stationary at the initial position of the robot guide rail. When the gripper robot starts to move forward, it first triggers the first mechanical valve through the U-shaped bracket, and causes the reversing valve to switch, connecting the air path to the second mechanical valve. When the gripper robot moves to the position of the second mechanical valve, it is triggered to open, and compressed air is sprayed through the nozzle to blow on the outer panel mold of the front cover. The blowing time depends on the movement speed of the gripper robot (generally lasts for 5 seconds). The gripper robot continues to move forward, and when it completely passes the second mechanical valve, the blowing automatically stops. After reaching the working position (i.e., the moment before the gripper robot puts down the outer panel of the front cover), the gripper robot places the inner panel of the front cover on the outer panel for fastening. Then the gripper robot... The robot continues forward and triggers the third mechanical valve, switching the reversing valve to the closed state. This ensures that no secondary air blowing occurs when the robot returns to the second mechanical valve. The gripper robot then moves to the stop position and returns to the starting position. When the first mechanical valve is triggered again, the reversing valve reopens to the second mechanical valve, preparing for the next work cycle. The entire process achieves precise synchronization between the air blowing operation and the robot's movement through the timing triggering of the mechanical valves. The duration of a single air blowing operation is determined by the robot's movement time through the second mechanical valve, the air blowing interval is synchronized with the robot's round-trip cycle, and the interlocking function of the third mechanical valve ensures that air blowing is not repeated on the return trip.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. An automatic air blowing device for an automobile front hood outer panel mold, characterized in that: The device body includes a lifting mechanism located in the middle of the front cover outer panel module, and the device body is used in conjunction with the gripper robot; The system includes a guide rail (3) parallel to the track of the gripper robot. A reversing valve (13) serving as the air distribution center is installed on the outer side of the guide rail. The reversing valve is connected to a mechanical valve installed on the inner side of the guide rail via an air pipe. There are at least three mechanical valves, which are evenly distributed on the guide rail according to the rhythm sequence of the gripper robot. The air outlet of each mechanical valve is connected to a jetting mechanism for directional blowing of zinc powder on the surface of the front cover outer plate mold via an air pipe.

2. The automatic air blowing device for the outer panel mold of an automobile front hood according to claim 1, characterized in that: The guide rail is fixed to the outside of the robot guide rail, and is a square hollow steel section, arranged parallel to the robot guide rail.

3. The automatic air blowing device for the outer panel mold of an automobile front hood according to claim 2, characterized in that: Each mechanical valve has a mounting hole on its seat, which is then fixedly connected to the guide rail by fasteners installed in the mounting hole.

4. The automatic air blowing device for automobile front hood outer panel mold according to claim 1, characterized in that: The mechanical valve is a one-way valve, and the directional valve is a two-position five-way directional valve.

5. The automatic air blowing device for the outer panel mold of an automobile front hood according to claim 4, characterized in that: When the electromagnet is de-energized, the valve core of the two-position five-way directional valve remains in its normal position, allowing compressed air to enter the rodless chamber of the cylinder from port P through port A, and to exhaust air from port B through port S, causing the piston to retract. When the electromagnet is energized, the valve core switches to another working position, with port P now connected to port B, and port A exhausting air through port R. Air enters the rod chamber of the cylinder and exhausts air from the rodless chamber, causing the piston to extend. Thus, the reciprocating direction control of the pneumatic actuator is achieved through the two-position switching of the valve core. Here, P is connected to the air source, A and B are connected to the mechanical valve, and R and S are the air outlets connected to the atmosphere.

6. The automatic air blowing device for the outer panel mold of an automobile front hood according to claim 1, characterized in that: The gripper robot has a base (9) installed on its track. A U-shaped bracket (8) for switching the mechanical valve is connected to the base. The U-shaped bracket includes bracket bodies symmetrically arranged on both sides of the base. The bottom of the bracket body is connected to the base through a through pin. The top of the bracket body is connected to an arc-shaped plate that contacts the roller of the mechanical valve stem.

7. The automatic air blowing device for the outer panel mold of an automobile front hood according to claim 6, characterized in that: The U-shaped bracket is mounted on the base and is flush with the installation height of the mechanical valve.

8. The automatic air blowing device for automobile front hood outer panel mold according to claim 1, characterized in that: The jetting mechanism includes a lifting bracket (2) installed on the lifting mechanism of the front cover outer plate mold and a nozzle (10) fixed on the lifting bracket. The nozzle (10) is connected to the air pipe through a pagoda connector. The pagoda connector is screwed into the installation interface of the nozzle, and the air pipe and the pagoda connector are fastened to the lifting bracket by a clamp.

9. The automatic air blowing device for an automobile front hood outer panel mold according to claim 8, characterized in that: The nozzles are at least 6 in number, all of which are fan-shaped nozzles with a spray angle of 120°.

Images