JP2004268178A - Car body manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately open a window by easily manufacturing a side body structure of a vehicle. <P>SOLUTION: The extrusion direction of a hollow extruded section 101 is juxtaposed in the longitudinal direction of the vehicle, and is joined in the longitudinal direction. Next, the window is opened by cutting a plurality of hollow extruded sections by a rear cutter 170 of a presser roller 151 in a state of pressing down a plurality of connecting places of a face plate and a connecting plate of the hollow extruded sections 101 by the presser roller 151 to a joined structure. Since the presser roller 151 presses down the connecting places of the face plate and the connecting plate, even if the places are pressed down by strong force, deformation of the face plate can be prevented. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a vehicle body having a window on a side surface of the vehicle body.
[0002]
[Prior art]
As in Patent Literature 1, a window is opened by welding a state in which a longitudinal direction of an extruded shape member is arranged along a circumferential direction toward a longitudinal direction of the vehicle body, as in Patent Literature 1. In this case, the window is roughly opened before welding. Further, as in Patent Literature 2, extruded profiles substantially excluding a window portion are arranged and welded.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 06-045340 (US5098007)
[Patent Document 2]
JP-A-2000-343249 (EP1057576A)
[0004]
[Problems to be solved by the invention]
In each case, the extruded profile is made in the form of a window in advance. The vehicle body has a camber in the longitudinal direction, and a window must be provided in parallel with this camber. To provide a window at the stage of the extruded profile, this camber must be calculated and provided, which is a cumbersome operation. In addition, since errors in arranging extruded profiles and errors in welding are not taken into account, errors may occur.
An object of the present invention is to provide a manufacturing method that can be easily manufactured and can accurately open a window.
[0005]
[Means for Solving the Problems]
The above object can be achieved by arranging extruded profiles along the longitudinal direction of the vehicle body to produce a side structure of the vehicle body, and then opening a window based on a camber.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the present invention will be described with reference to FIGS. The side structure 100 includes a plurality of hollow extruded profiles 101, and the longitudinal direction (extrusion direction) of the extruded profiles is oriented in the longitudinal direction of the vehicle body. The jig on which the plurality of hollow members are placed follows the shape of the outer surface of the side structure. The hollow extruded profile 101 here has the same shape in the longitudinal direction. The hollow extruded profile 101 is composed of two substantially parallel face plates and a plurality of connection plates for connecting the two. The connection plate at the end in the width direction of the extruded profile 101 is orthogonal to the face plate. An adjacent hollow member is fitted on the outer surface side of the orthogonal connecting plate, and this portion is friction stir welded from the outside. The friction stir welding is as described in Patent Document 2. In the agitation stirring joining, a plurality of hollow extruded sections 101 are arranged in a jig 120, and in this case, a longitudinally central portion of a lower end of the side structure is bent upward (giving a camber) to the side structure. In the case of the stir-stir welding, the butting portion between the face plates of the two hollow extruded profiles 101, 101 is viewed by a sensor, and the butting portion is friction stir-welded. This is the same when welding.
[0007]
When the joining of one surface of the side structure is completed, the side structure is turned over, and the other surface is joined by friction stir welding or welding with the other surface facing upward.
[0008]
Next, an operation of opening the window 105 and the entrance 106 (hereinafter, both are referred to as windows) is performed. This work is performed by a dedicated device. This apparatus includes a jig 120 and a processing device 130 running along the jig 120. The processing device 130 includes a gate-shaped traveling body 140 traveling along rails 131 on both sides in the width direction of the jig 120, a plurality of pressing roller devices 150 traveling along a beam on the upper side of the traveling body 140, and a cutting device. It consists of 170. There are two beams, and one of the beams is provided with the press roller device 150 and the cutting device 170. A holding roller device 150 is installed on the other beam. That is, the cutting device 170 is located at the center of the traveling body 140 in the traveling direction, and the pressing roller devices 150 are located before and after the cutting device 170. The holding roller device 150 and the cutting device 170 travel along the longitudinal direction of the beam. The cutting device 170 and the press roller device 150 can travel along the width direction of the side structure. The cutting device 170 and the pressing roller device 150 can move up and down.
[0009]
The cutting device 170 has a length that can simultaneously cut both the upper and lower surfaces of the hollow extruded profile 101, the connection plate, other rails, and the like. The rail of the hollow extruded profile 101 is a rail for installing an interior plate (not shown) inside the vehicle of the hollow extruded profile 101 and is integrally provided with the hollow extruded profile.
[0010]
The pressing roller device 150 has a rubber pressing roller 151 in contact with the upper surface of the side structure, and is capable of moving up and down in the vertical direction. The press roller device 150 presses the upper surface of the joint. The press roller device 150 restrains the side structure at the time of cutting, and the pressing force of the side structure is large. For this reason, the joint is held down. The joint has a connecting material orthogonal to the face plate. Even if the pressing force of the portion is large, the connecting material does not deform the face plate. The face plate has rigidity to withstand the insertion force of the rotating tool during friction stir welding. If there is a connection plate even in welding, it can withstand the holding force. The pressing roller 151 is in contact with the hollow extruded section 101 at right angles to the thickness direction.
[0011]
The press roller device 150 finds the joint with an optical sensor (not shown), and moves the roller 151 along the joint. The roller 151 is pressed by an air spring and moves up and down depending on the height of the joint. The roller 151 is installed on the beam via an air spring 152 and a vertical device 153.
[0012]
The cutting device 170 can run in the width direction of the side structure independently of the holding roller 151. The cutting device 170 includes an end mill 160, which is a cutting tool shown in the drawing, and a circular saw (not shown). The end mill 160 and the circular saw are installed in one elevating device 169, and the elevating device 169 can be selectively used by rotating the elevating device 169 in the horizontal direction. 1, 2, 4, 6, 8, 10, and 11 show an end mill. 3, 5, 7, and 9 also show the cutting device 160 cutting by an end mill. The cutting device 170 is vertically movable.
[0013]
In such a configuration, the processing state will be described with reference to FIGS. 3, 5, 7, and 9, a dotted line indicates a shape of the entrance 106 to be cut. In each figure, the pressing rollers 151 and 151 press the upper part of the joining line (solid line). FIG. 12 shows a state in which the window 105 and the entrance 106 are open.
[0014]
In each figure, the tip of the cutting tool 160 is inserted to the lower end of the side structure 100. In FIG. 3, when inserting the vertical side of the window, the cutting device 170 is moved along the upper side to cut. The traveling body 140 has stopped.
[0015]
Next, in FIG. 5, the running body 140 is run, and the cutting device 170 is run on the beam to cut the arc portion of the entrance 106 into an arc shape.
[0016]
Next, in FIG. 7, the traveling is limited to traveling of the traveling body 140, and only the upper side of the entrance 106 is cut.
Next, the arc portion at the entrance is cut.
[0017]
Next, in FIG. 9, only the cutting device 170 is run, and only the right side of the entrance is cut. After cutting the right side, the cutting device 170 is raised, the traveling body 140 is caused to travel, and the machine goes to the next cutting position.
[0018]
Thereby, the rear pressing roller 151 can be placed on the upper surface of the hollow extruded profile 101. When cutting the right side, the pressing roller 151 at the front end is placed on the hollow extruded profile, but the pressing roller 151 at the rear is inside the entrance and falls downward. The press roller is raised by contact of the hollow extruded profile 101 with the travel of the traveling body 140. For this reason, the height position of the press roller 151 in the entrance is dropped to a certain degree, and control for raising the height is not performed, the control can be performed without control, and the configuration can be simplified.
[0019]
The straight cut is made with a circular saw. Only the arc portion is cut by the end mill 160. First, a straight portion is formed with a circular saw, and an arc portion between the straight portions is cut by an end mill 160.
[0020]
In the above embodiment, the straight portion is cut, and then the arc portion is cut. According to this, since the arc portion to be cut last is supported in a cantilever manner, the face plate at this portion is easily bent in an arc shape. However, since the diameter of the end mill is larger than the thickness of the circle, the end mill is not damaged by the bending load. For this reason, it is preferable to cut the straight portion of the opening first, and then cut the arc portion at the corner connecting the straight portions with the end mill with an end mill. According to this, the member to be removed by cutting is cantilevered at the arc portion, but excessive force is applied to the remaining connecting portion. Reverse the cutting procedure, cut the first four arcs with an end mill, and then cut the straight part with a circular saw. If the last straight part is overloaded, an excessive force is generated and a load is applied to the circular saw. . Since the thickness of the circular saw is small, the bending load breaks the circular saw. However, if the straight portion is cut first, no bending load is applied to the circular saw. The bending load of the end mill at the arc portion to be cut last is applied. However, since the diameter of the end mill is generally large, the end mill is safe without being broken.
[0021]
In FIG. 13, there are four arc portions. In this case, the arc portions are cut by cutting two arc portions a and b along the short sides I and II, and finally by cutting the other arc portions c and d. According to this, the cantilever length of the window 105 can be shortened, and the amount of bending of the face plate can be reduced.
[0022]
Further, since the position of the cutting device is determined by observing the protrusion of the joint portion with the sensor, the position of the protrusion can be easily detected.
Although a hollow extruded profile is used in the above embodiment, the hollow extruded profile may not be used. The joining may be welding.
Further, the front and rear ends of the side structure 100 can be cut in a straight line by the circular saw of the above device.
[0023]
In FIG. 14, when the opening on the outside of the vehicle is smaller than the opening on the inside of the vehicle, the inside of the vehicle is cut to the size of two openings with a round end mill as described above, 101b and the connection plate 101c are cut to increase the opening inside the vehicle.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a main part at the time of cutting according to the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is a plan view during cutting.
FIG. 4 is a sectional view taken along the line VI-VI in FIG. 3;
FIG. 5 is a plan view during cutting.
FIG. 6 is a sectional view taken along line VII-VII of FIG. 5;
FIG. 7 is a plan view during cutting.
FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7;
FIG. 9 is a plan view during cutting.
FIG. 10 is a sectional view taken along line XX of FIG. 9;
FIG. 11 is a longitudinal sectional view at the end of cutting.
FIG. 12 is a perspective view of a cutting device according to an embodiment of the present invention.
FIG. 13 is a plan view of a window according to an embodiment of the present invention.
FIG. 14 is a vertical view showing a cutting height of a window according to an embodiment of the present invention.
[Explanation of symbols]
100: side structure, 101: hollow extruded profile, 105: window, 106 entrance, 140: traveling body, 150: holding roller, 151: holding roller, 160: end mill, 170: cutting device

Claims (5)

The extrusion direction of the hollow extruded profile is aligned along the longitudinal direction of the vehicle and joined along the longitudinal direction,
In a state where a plurality of connection points between the face plate and the connection plate of the hollow extruded profile are pressed against the joined structure, a plurality of the hollow extruded profiles are cut by a cutting device behind a pressing roller for pressing. Cutting,
A method of manufacturing a vehicle body characterized by the following. 2. The method for manufacturing a vehicle body according to claim 1, wherein the pressing roller presses a joint between the extruded profile and the extruded profile. The method for manufacturing a vehicle body according to claim 1, wherein the cutting device includes a circular saw and an end mill, and cuts a straight portion of an opening to be cut with the circular saw,
Next, cutting the arc portion connecting the straight portion and the straight portion with the end mill,
The features and method of producing the car body. 4. The method of manufacturing a vehicle body according to claim 3, wherein the opening is rectangular, and the end mill cuts two arc portions on the short side later than other arc portions. Production method. 4. The method for manufacturing a vehicle body according to claim 3, wherein the circular saw is used to cut the inside of the vehicle, and then the end mill is used. A method for manufacturing a vehicle body, comprising cutting a connecting plate with the end mill.

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