JP4070191B2 - Brazing method and apparatus for body assembly line - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for brazing a vehicle body assembly line that prevents spatter generated and scattered when the vehicle body is brazed and assembled.
[0002]
[Prior art]
When assembling the vehicle body 2 shown in FIG. 7, for example, on the left side, the roof plate 20 is brazed to the front pillar assembly 28 at the adhesion point B1, and the front side of the body side assembly 24L at the adhesion points B2, B3, and B4. And brazed to the rear part of the body side assembly 24L at adhesion points B5, B6, B7.
[0003]
During the brazing of the above bonding points B1 to B6, the scattering of spatter made of slag and metal particles is unavoidable. This causes the appearance quality of the subsequent coating to deteriorate.
[0004]
Conventionally, spatter adhesion in the brazing operation by human power or robot is unavoidable, and in order to emphasize the appearance quality, the operation of removing the spatter 5 after completion of brazing has been an indispensable procedure.
[0005]
Since the position and size of the sputter 5 to be deposited are not constant, the removal work of the sputter 5 is manual and has become a bottleneck for reducing man-hours.
[0006]
Regarding prevention of spatter, Japanese Utility Model Laid-Open No. 7-21272 discloses a technique of a spatter prevention cover for a spot welder.
However, this technology is to attach a spatter prevention cover to the spot welder so that the spatter generated by the spot welder does not hit the face and eyes of the operator and does not hinder the workability. The technical field is different from the prevention of scattering and adhesion of spatter to the vehicle body, which is the subject of the present invention.
[0007]
[Problem to be Solved by the Invention]
The present invention has been proposed in view of the above-described problems of the prior art, and is a brazing method for a vehicle body assembly line that prevents spatter generated and scattered when the vehicle body is brazed and assembled. And to provide a device.
[0008]
[Means for Solving the Problems]
The method for brazing a vehicle body assembly line according to the present invention includes a vehicle body placing step for placing the vehicle body (2) on the assembly line (8), and a brazing position (a brazing position for carrying out a predetermined brazing operation for the vehicle body (2)). Ps), a vehicle body positioning step, an engagement step for engaging the vehicle body (2) with the assembly line (8), and confirmation of completion of the engagement to confirm the vehicle body (2) Cover (30) lowering step for lowering the cover (30) covering the upper portion of the roof plate (20) from above to the upper portion of the roof plate (20), a brazing step for performing brazing to the vehicle body (2), and brazing It includes a brazing completion signal transmitting step for transmitting a brazing completion signal after the completion, and a cover (30) raising step for raising the cover (30) after the brazing completion signal is transmitted.
[0009]
The brazing method of the vehicle body assembly line having such a process prevents spatter scattering and adhesion to the vehicle body due to the brazing at the time of vehicle body assembly, thereby eliminating the conventional spatter removal step and improving the coating quality.
[0010]
In the engaging step for stabilizing the vehicle body (2) on the assembly line (8), the vehicle body pedestal (50) provided on the assembly line (8) and the vehicle body (2) are engaged using air. It is preferable to combine them (claim 2).
[0011]
Since the lowering of the cover can be controlled using the supply of air used for the engagement as a signal, the engagement between the vehicle base and the vehicle body is reliable and easy.
[0012]
In the cover raising step and the cover lowering step, the cover (30) is preferably raised and lowered by power (Claim 3).
[0013]
For example, if the cover is raised or lowered by power from the air cylinder, it can be raised or lowered accurately and reliably by air supply control. The power application in the practice of the invention may be hydraulic or an electric motor.
[0014]
The brazing device for a vehicle body assembly line according to the present invention includes a cover (30) formed so as to be able to cover the roof plate (20) of the vehicle body (2) from above, and a flexible strip engaged with the cover (30). Material (32, 34), pulling means (40) for pulling or pulling the flexible strip (32, 34), and control means (46, 55) for controlling power supply to the pulling means (40) The control means (46, 55) confirms that the vehicle body (2) is engaged with a predetermined position (Ps) of the assembly line (8), and the flexible strip (32, 34) is pulled out, the cover (30) is lowered to the upper part of the roof plate (20) of the vehicle body (2), and when the brazing to the vehicle body (2) is completed, the flexible strips (32, 34) Is configured to perform control to pull up the cover (30) and raise the cover (30) ( Motomeko 4).
[0015]
In carrying out the present invention, when a body is brazed by placing a cover freely above and below the body assembly line and operating the cover with a pulling means that pulls out or pulls the wire of the flexible strip. Cover the top of the vehicle with a cover to prevent spatter from scattering and sticking.
[0016]
The cover (30) is preferably made of FRP (Claim 5).
By forming the cover with FRP, strength and rigidity can be obtained, there is no scratch due to contact with the vehicle body, and manufacturing is easy.
[0017]
The cover (30) is preferably painted with a fire-proof paint (Claim 6).
This prevents ignition and combustion of the paint by brazing sparks and spatter.
[0018]
The traction means (40) is preferably an air cylinder (40) whose power is air (Claim 7).
[0019]
Since the assembly line has many places where air is used, air can be easily supplied to the traction means. In addition, there is no problem of securing a hydraulic power source by using hydraulic pressure, no fouling due to oil leakage, and there are no faults of ignition, and there are no faults of electric leakage or short circuit by using electric power.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective configuration diagram showing an embodiment of the present invention, in which a cover elevating device 3 attached to an unspecified device is arranged above a vehicle body 2 that moves by engaging an unspecified assembly line. Yes.
[0021]
The cover lifting / lowering device 3 includes a cover 30 formed in a shape capable of covering the roof plate 20 of the vehicle body 2 from above, flexible strip wires 32 and 34 for moving the cover 30 up and down, and a pulley 36. , 36, the cylinder 40 of the wire pulling means, the control valve 46 of the control means for supplying air to the cylinder 40, and the control device 55 constitute the main part.
[0022]
The cover 30 has a size and shape that prevents spatter from scattering and adhering to the roof plate 20, the body side assemblies 24L and 24R, and the front pillar assembly 28 when the bonding points B1 to B6 shown in FIG. Is formed.
[0023]
The cover 30 is formed of FRP resin with the roof plate 20 as a main mold, and is engaged with the ends of the wires 32 and 34 by a plurality of hooks 31 provided on the upper surface.
[0024]
The material of the cover 30 is not limited to FRP, but may be any soft material that can maintain rigidity, is less damaged by sputtering, and does not damage the vehicle body side by contact with the vehicle body 2, particularly the roof plate 20.
[0025]
Also, the coating for surface smoothness and antifouling properties is painted with a fireproof paint that prevents ignition by sparks.
[0026]
The wires 32 and 34 are communicated with the piston rod 41 of the cylinder 40 via pulleys 36 and 36.
[0027]
Referring also to the block diagram showing the function of the control valve 46 in FIG. 3, the cylinder 40 is provided with air pipes 42 and 44 before and after the air-operated piston, and the air pipes 42 and 44 are connected to the control valve 46. It is communicated.
[0028]
The control valve 46 is configured to have the air pipes 42 and 44, the exhaust pipes 48 and 49, the air supply pipe 47, and a mechanism for controlling the air passage. For example, to raise the cover 30, the air pipe 42 has a function of supplying air to 42 and moving the piston rod 41 of the cylinder 40 in the right direction.
[0029]
The base body 50 and the control device 55 are communicated with each other by a signal line 50L, and the control device 55 is communicated with the control valve 46 by a control line 55L.
[0030]
The control device 55 constitutes a control means together with the control valve 46, receives an air supply signal for engaging with the work 2 transmitted by the engaging portion 52 of the base body 50, and lowers the cover 30 at an appropriate timing. Or it has the function to raise.
[0031]
The power of the cover lifting / lowering device 3 depends on air with abundant power sources, but it may be hydraulic or a mechanism using an electric motor.
The wire pulling means is not based on the power as described above, and may be based on human power such as a manual winch.
[0032]
Further, the instruction for lowering or raising the cover 30 may be performed by operating the control valve 46 by an operator's switch operation without using the control device 55, or the cover 30 may be manually operated without relying on the control valve 46. 20 may be attached.
[0033]
The operation of the brazing apparatus for a vehicle body assembly line having the above configuration will be described with reference to the flowchart shown in FIG.
[0034]
First, it is confirmed whether or not the cover 30 suspended above the assembly line 8 is in the raised position (step S1) and the work 2A, which is a predetermined vehicle body, can be placed at the brazing work position Ps. If it is OK, the process proceeds to step S2. If NO, the process waits until the cover 30 reaches the raised position.
[0035]
In step S2, the work 2A is placed on the line 8 (vehicle body placing step, see FIG. 4), and is advanced toward the brazing work position Ps.
[0036]
Next, it is confirmed whether or not the work 2A is placed at the brazing work position Ps (step S3). If fixed and OK, the process proceeds to step S4, and if NO, the process waits for completion of the fixed process and proceeds to step S4 (engagement step, see FIG. 5).
[0037]
In step S4, the engaging portion 52 of the pedestal body 50 is raised, and the work 2A is engaged (clamped) and fixed to the pedestal body 50 (engagement step).
[0038]
Next, the wires 32 and 34 are pulled out from the cylinder 40 to lower the cover 30 (step S5, cover lowering step). Then, the cover 30 is set on the roof plate 20.
[0039]
Next, a brazing operation is performed (step S6). The brazing operation may be automatic bonding by a robot or manual operation (brazing process).
[0040]
Next, the brazing operation is completed and a work completion signal is transmitted. Then, it is confirmed whether or not a work completion signal has been transmitted (step S7). If YES, the process immediately proceeds to step S8. The work completion signal may be transmitted by the worker (a brazing completion transmission process).
[0041]
In step S8, the work 2A is disengaged (unclamped) from the base body 50.
[0042]
Next, the wires 32 and 34 are drawn into the cylinder 40, and the cover 30 is pulled up above the workpiece 2A (step S9, cover raising step).
Then, the work 2A is advanced to the next process (see FIG. 6).
[0043]
In the next step S10, it is confirmed whether or not there is the next workpiece 2A. If there is the next workpiece 2A, the process returns to step S1 and brazing without spatter scattering and adhesion is performed by using the cover 30. If there is no next work 2A, this work is terminated.
[0044]
As described above, during the brazing operation, the roof plate 20 of the work 2A, which is the vehicle body, is covered and brazing without spatter scattering and adhesion is performed, and the spatter removal prior to coating and the dust removal operation during brazing are omitted. be able to.
[0045]
【The invention's effect】
The effects of the present invention are listed below.
(1) According to the present invention, spatter generated and scattered when the vehicle body is brazed and assembled is prevented from adhering to the vehicle body. Is peeled off.
(2) If the engagement between the vehicle body base body and the vehicle body in the assembly line is performed with air, the confirmation and transmission of the engagement signal is reliable and easy.
(3) If the cover is raised and lowered with power, control can be performed reliably.
(4) If the cover is moved up and down with an air cylinder, the air frequently used in the assembly line can be used, and there is no problem of securing a power source when using hydraulic pressure or electric power, and there are no drawbacks such as oil stains and leakage short circuit.
(5) If the cover is formed of FRP, it has strength and rigidity, and is easy to manufacture without being scratched by contact with the vehicle body.
(6) If the cover is painted with fireproof paint, ignition and combustion by sparks and spatter can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective configuration diagram showing an embodiment of the present invention.
FIG. 2 is a block configuration diagram of the main part of FIG.
FIG. 3 is a flowchart showing a work process of the present invention.
FIG. 4 is a diagram 1 illustrating a work procedure.
FIG. 5 is a schematic diagram 2 showing a work procedure.
FIG. 6 is a schematic diagram 3 showing a work procedure.
FIG. 7 is a perspective view illustrating a conventional embodiment.
[Explanation of symbols]
2 ... body, work 5 ... sputter 8 ... assembly line 20 ... roof plate 24 ... body side assembly 28 ... front pillar assembly 30 ... cover 32, 34 ... wire 36 ... pulley 40 · · Air cylinder 41 · · Piston rod 46 · · Control valves 47, 48, 49 · · Pipe 50 · · Car body pedestal 52 · · Engagement portion 55 · · Control device

Claims (7)

A vehicle body placing step for placing the vehicle body on the assembly line; a vehicle body positioning step for placing the vehicle body at a brazing position for performing a predetermined brazing operation; and an engagement for stabilizing the vehicle body on the assembly line. An engagement step, a cover lowering step of lowering a cover covering the roof plate upper portion of the vehicle body from above to the roof plate upper portion after confirming the completion of the engagement, and a brazing step of performing brazing to the vehicle body, A brazing method for a vehicle body assembly line, comprising: a brazing completion signal sending step for sending a brazing completion signal after brazing is completed; and a cover raising step for raising the cover after the brazing completion signal is sent. 2. The method of brazing a vehicle body assembly line according to claim 1, wherein in the engaging step for stabilizing the vehicle body on the assembly line, the vehicle body pedestal body provided on the assembly line and the vehicle body are engaged using air. 3. The method of brazing a vehicle body assembly line according to claim 1, wherein the cover raising step and the cover lowering step raise and lower the cover by power. A cover formed so as to be able to cover the roof plate of the vehicle body from above, a flexible strip that engages with the cover, traction means that pulls out or pulls the flexible strip, and power supply to the traction means Control means for controlling the vehicle, the control means confirming that the vehicle body is engaged with a predetermined position of the assembly line, pulling out the flexible strip material and extending the cover to the upper part of the roof plate of the vehicle body. A brazing device for a vehicle body assembly line, wherein the brazing device is configured to perform control for lowering and pulling the flexible strip material and raising the cover when brazing to the vehicle body is completed. The brazing device for a vehicle body assembly line according to claim 4, wherein the cover is formed of FRP. The brazing device for a vehicle body assembly line according to claim 4 or 5, wherein the cover is coated with a fireproof paint. The brazing device for a vehicle body assembly line according to any one of claims 4 to 6, wherein the traction means is an air cylinder whose power is air.

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