JPH07187034A - Method of measuring shape of front fender panel - Google Patents

Abstract

PURPOSE:To improve the reliability on the data on measurement of panel form by fixing each part of a front fender panel with a mounting bolt while positioning it in fixed order. CONSTITUTION:A rear model M1 is fixed temporarily to a front fender panel 2, and an upper model M2 is fixed in the specified position of the panel 2. Next, the position in width direction of the front of the panel 2 is positioned, using a reference projection in width direction of the upper model M2, and then mounting bolts B1-B4 are tightened to specified torque in order of the front of a flange part 2a extended inward of the top, the top of a flange part 2a extended rearward of the rear, and the residual part of the flange part 2a extended inward of the top. Next, the remaining models M3 and M4 are fixed in the specified positions of the panel 2, and also the space C and difference in level between the panel 2 and each model M1-M4 are measured at every point. Hereby, the reliability on the data on measurement of panel form improves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the shape of a front fender panel of a vehicle in the same state as when the vehicle is assembled by tightening a mounting bolt.

[0002]

2. Description of the Related Art Conventionally, as a method as described above, there is one shown in FIG. 7, and in this conventional method, an abutment 1a at an upper portion of a panel gauge 1 extends inwardly at an upper portion of a front fender panel 2. The front side of the front fender panel 2 set on the panel gauge 1 with the flange portion 2a placed thereon and the inner side surface of the lower portion of the front fender panel 2 abutting on the lower support column 1b of the panel gauge 1 extends inward. The flange portion 2a, the rearwardly extending flange portion 2b, and the lower downwardly extending flange portion 2c are respectively attached by the mounting bolts 3 that are inserted therethrough in the same manner as when assembling to the vehicle body. A plurality of models 4 fixed to the panel gauge 1 and then slidably provided on the panel gauge 1 as indicated by the arrows in the figure are slid toward the front fender panel 2 to locate them in place. The pin 5 is positioned and fixed, and in that state, the gap C and the step S between the front fender panel 2 and the model 4 are measured at predetermined points with a gap measuring device or a step measuring device (for example, 1980. Please refer to (1) Shape measurement part in Section 5.8.2 “Problem solving method” on pages 145 to 147 of Volume 19 “Automobile manufacturing method” published by Sankaido Co., Ltd. thing).

[0003]

However, in the above-mentioned conventional measuring method, the procedure for setting the front fender panel 2 and the procedure for bolting with the mounting bolts 3 are tentatively standard because they are similar to those at the time of assembling the vehicle body. Although it has been put into practice, even if the standard work procedure was followed, the reproducibility of the measurement data was not verified as a front fender panel measurement system, so there was a large variation in the measurement data, and therefore the reliability of the measurement data was low. Therefore, it is difficult to determine whether the obtained C _P value is a true panel C _P value or a measurement error, especially when trying to investigate the process capability index (C _P value) of the panel. .

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a measuring method that advantageously solves the above problems. The first method of measuring the shape of a front fender panel according to the present invention is When measuring the shape of the front fender panel, first, set the panel to be measured on the panel gauge, and then the above-mentioned panel, a flange portion extending inward at the upper portion, and a flange portion extending rearward at the rear portion,
After lightly screwing the mounting bolts respectively inserted into the flange portion extending downward in the lower portion into the panel gauge, slide the rear model extending substantially vertically in the rear of the panel toward the panel. Position and fix it at a predetermined position, and then using the front-rear direction reference part and the up-down direction reference part of the rear model, the front-rear direction position of the rear part of the panel with respect to the panel gauge and the rotation direction around the width direction axis. The posture is adjusted, and the panel is temporarily fixed to the rear model by using a magnet in that state, and then the upper model extending substantially in the front and rear direction inside the upper part of the panel is slid toward the panel. Then, it is positioned and fixed at a predetermined position, and the widthwise reference portion provided on the upper model is used to align the widthwise position of the front portion of the panel, and thereafter, the Lightly tighten the mounting bolts in order of the front part of the flange part extending inward of the part, the upper part of the flange part extending rearward of the rear part, and the remaining part of the flange part extending inward of the upper part. Then tighten the bolts in the same order to the specified torque,
After that, firmly tighten the remaining mounting bolts in a predetermined order, then slide the remaining model toward the panel to position and fix it in a predetermined position, remove the magnet, and remove the magnet for each predetermined point. It is characterized in that a gap and a step between the panel and each of the models are measured.

A second method of measuring the shape of a front fender panel according to the present invention is such that, when measuring the shape of a front fender panel, first, a panel to be measured is set on a panel gauge, and then the inside of the upper part of the panel is set. The locating pin is inserted into the rear portion of the flange portion extending to the position of the rear portion of the panel in the width direction with respect to the panel gauge, and then inserted into the front portion of the inwardly extending flange portion, A locate bolt having a straight portion corresponding to the plate thickness of the panel is lightly screwed into the panel gauge to align the widthwise position and the heightwise position of the front portion of the panel with the panel gauge, and then the inward direction of the upper portion. After lightly tightening the mounting bolt inserted in the rear part of the flange part extending to the upper part, the location of the front part of the flange part extending inward of the upper part The bolt and the mounting bolt at the rear of the flange portion that extends inward of the upper portion are tightened in that order to a predetermined torque, respectively, and then the upper portion of the flange portion that extends rearward of the rear portion of the panel. Lightly tighten the mounting bolt inserted into the panel gauge to the specified torque and then firmly tighten to the specified torque, and then extend downward at the lower part of the panel and the mounting bolt inserted into the lower part of the flange extending rearward of the rear part. Firmly tighten the mounting bolt inserted into the existing flange portion, then lightly tighten the mounting bolt inserted into the center of the inwardly extending flange portion to the panel gauge until it reaches the specified torque. Then, firmly tighten the remaining mounting bolt inserted into the flange portion extending downward at the bottom of the panel, and then, The upper model, which extends substantially in the front-rear direction inside the upper part of the panel, is slid toward the panel to position and fix it in a predetermined position, and extends substantially vertically in the rear part of the panel. The rear model is rotated toward the panel to be positioned and fixed at a predetermined position, and thereafter, the gap and the step between the panel and each model are measured at every predetermined point. It is a thing.

[0006]

In both the first and second methods, in order to suppress variations in the setting of the front fender panel on the panel gauge, the positioning of each part of the panel is performed until the variations in the measured data fall within the range of dimensional tolerance. The fixing order is determined by various trial and error.In all of these methods, the parts of the front fender panel are positioned in a fixed order and fixed with the mounting bolts. The deformation of each part of the shape of the front fender panel due to the tightening of the bolts becomes uniform regardless of who tightens the mounting bolts. Therefore, according to these methods, the reliability of the measurement data can be improved.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of a first method of measuring the shape of a front fender panel according to the present invention. In the method of this embodiment, when measuring the shape of a front fender panel, first, a panel gauge 1 is used. In the same manner as the conventional method described above, the front fender panel 2 to be measured is set, and then, for temporary setting of the panel 2, it is inserted into the flange portion 2a extending inward of the upper portion of the panel 2. Adjust the three mounting bolts B1, B2, B3, and the mounting bolt B4 inserted in the upper part of the two rearwardly extending flanges 2b in any order by moving the panel 2. Lightly screw into the panel gauge 1 as much as possible, then slide the rear model M1 that extends substantially vertically in the rear of the panel 2 toward the panel 2 and locate it on the panel gauge 1 with the locate pin. Fixed to Me-decided.

Then, the panel 2 is appropriately displaced to rear model
The panel 2 is abutted against the front-back reference protrusion 6 of the M1 and the panel 2 is attached to the vertical reference bead 7 of the rear model M1.
By aligning the position of the bead portion 2d of the, the front and rear direction position of the rear portion of the panel 2 and the camber posture (rotation direction posture) around the width direction axis with respect to the panel gauge 1 are matched to the rear model M1. The panel 2 is temporarily fixed using two magnets 8 to hold the above-mentioned positioned state of the panel 2 until bolting is completed, and then extends substantially in the front-back direction inside the upper portion of the panel 2. By sliding the upper model M2 toward the panel 2 and positioning and fixing it in a predetermined position of the panel gauge 1 with the locate pin, and by abutting the panel 2 on the widthwise reference protrusion 9 on the front part of the upper model M2. , Align the position of the front part of the panel 2 in the width direction.

Thereafter, a mounting bolt B1 at the front of the flange portion 2a extending inward of the upper portion, a mounting bolt B4 at the upper portion of the flange portion 2b extending rearward of the rear portion, and inward of the upper portion. In the order of the mounting bolts B3 and B2 at the rear and center of the extending flange 2a, lightly tighten each mounting bolt with a screwdriver to determine the front and rear positions in the width and vertical directions, and finally the panel shape. , Tighten the bolts in the same order to the specified torque (for example, a torque of about 20 kg ・ cm, which is about the same as when tightening strongly with a screwdriver), and then tighten the remaining mounting bolts B5, B.
After tightening firmly in the order of 6, B7, B8, slide the remaining models M3, M4 toward the panel 2 to position and fix them in place with locating pins, and remove the two magnets 7 The gap C and the step S between the panel 2 and each of the models M1 to M4 are measured at every predetermined point up to (1) to (4).

At the time of this measurement, in order to suppress the variation in reading by the measurer and the variation in the type and application of the measuring device, and to improve the reproducibility of the measuring point, FIG.
As shown in, set the step gauge 10 on the model M1 to M4 in line with the marking line L drawn on the model M1 to M4, and set the gap gauge 11 on the side surface of the model M1 to M4. It will be used in close contact.

Table 1 shows the measurement error index as a result of measuring the shape of the front fender panel as described above, and the measurement error index is obtained by the following equation.

[Equation 1]

[0012]

[Table 1] As is clear from Table 1, the variations (± 3σ) in the panel measurement data are all within 50% of the dimensional tolerance after the improvement in the third stage, and therefore according to the method of this example, Since the deformation of each part of the shape of the front fender panel due to the tightening of the mounting bolt is uniform regardless of who tightens the mounting bolt, the reliability of the measurement data can be improved.

FIG. 4 shows an embodiment of the second method of measuring the shape of the front fender panel according to the present invention. In the method of this embodiment, when the shape of the front fender panel is measured, first the panel is measured. A front fender panel 2 to be measured on the gauge 1 in the same manner as in the above embodiment.
Set, then insert the locate pin 5 into the rear portion of the flange portion 2a extending inward of the upper portion of the panel 2 to align the rear portion of the panel 2 with the panel gauge 1 in the width direction, and then to the inner portion of the upper portion. As shown in FIG. 5, the panel 2 is inserted through the front portion of the flange portion 2a extending in
(0.7 mm) straight part ST having a straight portion ST at the base of the screw is lightly screwed into the panel gauge 1 by hand, and the width direction position and height direction position of the front part of the panel 2 with respect to the panel gauge 1 are set. Match. At this time, lift up the panel with the free hand and confirm that the panel 2 is in the straight part ST, and locate pin.
Screw B0 in so that panel 2 does not enter the trough of the screw and exert extra force on panel 2.

Then, a mounting bolt B11 inserted into the rear portion of the flange portion 2a extending inward of the upper portion at a position adjacent to the locate pin LP is lightly tightened by a screwdriver to vertically position and widthwise position the panel 2. After surely positioning and, the locating bolt B0 in front of the flange portion 2a extending inward of the upper portion, and the mounting bolt B11 in the rear portion of the flange portion 2a extending inward of the upper portion, In that order,
Tighten the bolts to the specified torque (for example, the torque of about 20kg ・ cm, which is about the same as when tightened strongly with a screwdriver), and make the panel deformation of the bolt tightening seat surface uniform regardless of who tightens it. , Lightly tighten the mounting bolt B12 inserted in the upper part of the flange 2b extending rearward of the rear part of the panel to the panel gauge 1 with a screwdriver and then apply the same predetermined torque (for example, 20 kg
・ Securely tighten up to (cm) to determine the shape of the continuous surface with the door.

Next, a mounting bolt B13 inserted through the lower portion of the flange portion 2b extending rearward of the rear portion and mounting bolts B14, B15 inserted through the rear portion of the flange portion 2c extending downward at the lower portion of the panel 2. Tighten in that order firmly with a screwdriver, then the flange part 2a extending inward of the upper part
First, lightly tighten the mounting bolt B16 inserted in the center of the panel gauge 2 with a screwdriver, and then firmly tighten to the same predetermined torque (for example, 20 kgcm) as above to determine the shape of the continuous surface with the engine hood. Then, the remaining mounting bolts B17, B18 inserted through the front side of the flange portion 2c extending downward at the lower part of the panel 2 are firmly tightened with a screwdriver, and thereafter, substantially in the front-back direction inside the upper part of the panel 2. The upper model M5 extending to the panel 2 is slid toward the panel 2 to be positioned and fixed at a predetermined position of the panel gauge 1 with a locate pin, and the rear model M6 extending substantially vertically in the rear of the panel 2 is attached to the panel. Rotate toward 2 and position and fix at a predetermined rotation position with a stopper,
After that, for each predetermined point up to
The gap C and the step S between the panel 2 and each model M5, M6 are measured.

Also in this measurement, in order to suppress the variation in reading by the measurer and the variation in the type and application of the measuring device and to enhance the reproducibility of the measuring point, as in the case shown in FIG. The step gauges are set on those models according to the marking lines L drawn on the models M5 and M6, and the gap gauges are used by being closely attached to the side surfaces of the models M5 and M6.

Table 2 shows the measurement error index as a result of measuring the shape of the front fender panel as described above, and the measurement error index is obtained by the same calculation formula as that used in the previous embodiment.

[0018]

[Table 2] As is clear from Table 2, in this example as well, the variation (± 3σ) in the panel measurement data was within 50% of the dimensional tolerance after the improvement after the fourth step, and therefore, this example was used. Also by the method of, the deformation of each part of the shape of the front fender panel due to the tightening of the mounting bolt,
Even if anyone tightens the mounting bolt, it will be uniform, so that the reliability of the measured data can be improved.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example. For example, a laser distance measuring device or the like may be used as the measuring device for shape measurement. Even in that case, the shape of the panel when bolted is always a uniform condition for each measurement, so that the effects of the present invention described above can be obtained.

[0020]

Thus, according to the measuring method of the present invention,
Since each part of the front fender panel is positioned in a fixed order and fixed with the mounting bolts, the deformation of each part of the shape of the front fender panel due to the tightening of the mounting bolts becomes uniform no matter who tightens the mounting bolts. Therefore, the reliability of the measurement data can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a first method of a shape measuring method for a front fender panel according to the present invention.

FIG. 2 is an explanatory diagram showing measurement points of a gap and a step in the above embodiment.

FIG. 3 is an explanatory diagram showing a method of measuring a gap and a step in the above embodiment.

FIG. 4 is an explanatory view showing an embodiment of a second method of the front fender panel shape measuring method of the present invention.

FIG. 5 is an explanatory view showing a method for screwing in a locate bolt in the above embodiment.

FIG. 6 is an explanatory diagram showing measurement points of a gap and a step in the above embodiment.

FIG. 7 is an explanatory diagram showing a conventional method for measuring the shape of a front fender panel.

[Explanation of symbols]

 1 Panel gauge 2 Front fender panel 2a to 2c Flange portion 5 Locate pin 6 Front-back reference protrusion 7 Up-down reference bead 8 Magnet 9 Width reference protrusion 10 Step gauge 11 Gap gauge 11 B0 Locate bolt B1 to B8, B11 to B18 Mounting bolt M1 to M6 Model C Gap S Step

Claims (2)

[Claims] 1. When measuring the shape of a front fender panel, first, a panel to be measured is set on a panel gauge, and then a flange portion extending inwardly of an upper portion of the panel and rearward of a rear portion thereof are extended. After lightly screwing the mounting bolts respectively inserted into the flange portion and the flange portion extending downward of the lower part into the panel gauge, a rear model that extends substantially vertically in the rear of the panel is attached to the panel. Slide toward and fix it in place at a predetermined position, and then use the front-rear direction reference part and the up-down direction reference part of the rear model to position the rear part of the panel in the front-rear direction and the width-direction axis with respect to the panel gauge. The direction of rotation of the panel, and in that state, the panel is temporarily fixed to the rear model by using a magnet, and then substantially in front of the upper part of the panel. The upper model extending in the rear direction is slid toward the panel to be positioned and fixed in a predetermined position, and the widthwise reference portion provided on the upper model is used to determine the widthwise position of the front part of the panel. Matching, then, the front part of the flange portion extending inward of the upper portion, the upper portion of the flange portion extending rearward of the rear portion, the remaining portion of the flange portion extending inward of the upper portion in the order Lightly tighten the mounting bolts, then tighten the bolts in the same order to the specified torque, and then
After firmly tightening the remaining mounting bolts in a predetermined order, slide the remaining model toward the panel to position and fix it in a predetermined position, remove the magnet, and remove the panel and the panel at predetermined points. Characterized by measuring the gap and the step between each model,
Front fender panel shape measurement method. 2. When measuring the shape of a front fender panel, first, a panel to be measured is set on a panel gauge, and then a locating pin is inserted into a rear portion of a flange portion extending inward of an upper portion of the panel to insert the panel. Aligning the widthwise position of the rear portion of the panel with respect to the gauge, then inserted into the front portion of the flange portion extending inward of the upper portion,
A locating bolt having a straight portion corresponding to the plate thickness of the panel is lightly screwed into the panel gauge to align the widthwise position and the heightwise position of the front portion of the panel with respect to the panel gauge, and then the inside of the upper portion. Lightly tighten the mounting bolt that is inserted through the rear part of the flange that extends in one direction, and then
Firmly tighten the locating bolt at the front of the flange extending inward of the upper part and the mounting bolt at the rear of the flange extending inward of the upper in that order up to a predetermined torque. After that, the mounting bolt inserted into the upper portion of the flange portion extending rearward of the rear portion of the panel is lightly tightened to the panel gauge and then firmly tightened to a predetermined torque, and then the flange extending rearward of the rear portion. The mounting bolt inserted into the lower part of the section and the mounting bolt inserted into the downwardly extending flange part of the panel are firmly tightened, and then inserted into the central part of the inwardly extending flange part of the upper part. Lightly tighten the mounting bolts to the panel gauge and then firmly to the specified torque, then attach the bolts to the flange extending downward at the bottom of the panel. Firmly tightening the threading was left mounting bolts, thereafter, with slide the positioning and fixing in position toward the upper model that extends to a substantially longitudinal direction in the inside of the top of the panel to the panel,
A rear model extending substantially vertically in the rear of the panel is rotated toward the panel to be positioned and fixed at a predetermined position, and thereafter, at a predetermined point, between the panel and each model. A method for measuring the shape of a front fender panel, which is characterized by measuring a gap and a step.