JPH0116614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for an automobile jig master model using an aluminum honeycomb plate and a method for manufacturing the same.

Conventionally, various efforts have been made to reduce the weight of a master model of an automobile jig. for example,
To give an example, as shown in FIGS. 1 to 5, a model 1 made of a resin material is placed on a supporting member 2.
A structure 3 is provided to support the structure 3, and in order to reduce the weight and make it lightweight, the structure 3 is made of aluminum casting with a large number of lightening holes 4 drilled and hollowed out. In addition, each surface of the structure 3 is finished by cutting by machining, and left and right fittings 5, also formed of aluminum casting, are fixed to the structure 3 with bolts 6, and Knock pins 8 are screwed into the steel bushes 7a and 7b screwed into the fitting 5.
He used this to determine the position and achieve high accuracy.

Note that the steel bushings 7a and 7b were screwed into the structure 3 and the left and right joint fittings 5 because the material of both is soft aluminum. This is because, since it is a cast metal, the pin hole is likely to expand and deform when the notch pin 8 is driven in, making it impossible to reproduce divisions with high accuracy.This problem is resolved and reproduction of divisions with high precision is made possible. It's for a reason. In the figure, reference numeral 9 is a locate bush, and 10 is a free roller.

However, due to manufacturing constraints, the master model must have a strength that exceeds the specifications for the structure, so it is not possible to unnecessarily drill holes and reduce the thickness of the aluminum casting structure. However, there is a problem in that it is not possible to significantly reduce weight.

As a solution to the above-mentioned conventional problems, the sixth
A structure a using an aluminum honeycomb plate interposed with a honeycomb-shaped aluminum honeycomb 11 that is lighter than casting as shown in the figure can be considered, but in the case of the structure a, the front and back surfaces of the structure a The parallelism of the two aluminum plates 12, 12', and the parallelism of the two aluminum plates 12, 12'
Since the accuracy of one of the aluminum plates 12' is not guaranteed, it cannot be used as a structure as is.

That is, when building the structure a, an aluminum plate 12 cut into a predetermined shape is placed on a surface plate (not shown), adhesive is applied to its upper surface, and the structure is attached to the outer peripheral edge. A peripheral aluminum plate 14 that forms the outer peripheral edge when forming a and surrounds the aluminum honeycomb 11 to be described later is adhered, and an aluminum plate 15 for model attachment is adhered to a position that will be the attachment part of the model support body, In order to join and glue the other parts of the aluminum honeycomb 11, and to form a predetermined recess at the position where the left and right joint fittings will be attached on the aluminum honeycomb 11, it is necessary to cut the part, or to preliminarily cut the aluminum The honeycomb 11 is formed short, an adhesive is further applied to this part and the aluminum honeycomb 11, and an aluminum plate 15' for fitting fittings is glued to the position where the left and right fittings are to be attached.Finally, the aluminum plate 1
An aluminum plate 12' cut into the same shape as 2 is placed and bonded to form a structure a, and at least a model post, etc., which will be described later, is formed on the outer surface (outer periphery) of the peripheral aluminum plate 14. In order to attach the parts, parts that require precision are cut and finished.

Therefore, the accuracy of the aluminum plate 12 placed on the surface plate is guaranteed, but the accuracy of one of the aluminum plates 12' is not guaranteed. The parallelism of is also not guaranteed. However, even if it is not guaranteed, the error is approximately 0.2mm.

Therefore, in order to achieve parallelism in the width direction of the vehicle body, several shims were inserted between the structure made of the aluminum honeycomb plate and the left and right joints, and by increasing or decreasing the number of shims, the parallelism was adjusted. It is possible to release it. FIGS. 7 to 10 show the manufacturing process using the shim.

First, a pair of aluminum honeycomb plates a and a' are placed on a surface plate equipped with a three-dimensional measuring machine ( (not shown), the left and right fittings 16 are fixed to the inside of one structure a' with bolts 17, and the dowel pins 18 are driven in to position the vehicle body in the longitudinal and vertical directions. The left and right joint fittings 16 are made with a minus dimension for the insertion of the shim 19.

Next, while measuring with the dial gauge 21 attached to the head 20 of the three-dimensional measuring machine, a shim 19 is inserted between the other structure a and the left and right joint fittings 16.
is inserted to achieve accuracy in the width direction of the vehicle. (See Figure 8) After that, the other structure a is fixed with bolts 22, and the left and right structures a and a' are connected and fixed, and then the shim 19 of the other structure a is fixed. Knock pins (not shown) are driven into the unpositioned portions to position the other structure a in the longitudinal and vertical directions, thereby completing the structure of the master model.

Resin models 24, 2 are mounted on the surfaces of the left and right structures a, a' via model supports 23, 23'.
4' and the model post 25 etc. to complete the master model. Code 26 in the figure
Numerals a and 26b are steel bushings, and 27 is a locating bushing.

However, in the case where a master model is created using this shim 19, once it is disassembled, even if the shim 19 is marked with a code etc., the exact shim position cannot be reproduced.
Therefore, there is a problem that the left and right structures a and a' cannot be disassembled and reproduced.

Therefore, if the left and right structures a and a' cannot be disassembled, they can only be used for matching the workpiece receiving surface model in the main process of an automobile body assembly jig as shown in Fig. 11. It is something that cannot be done. In the figure, reference numeral 28 is a main assembly jig, and 29 is a jig post.

Therefore, the model 24 (or 2
4') by inverting a negative (concave) model 30 as shown in FIG. 12, and then creating a plurality of models 31 as shown in FIG. 13 from the negative model 30. FIG. 14 shows an example of the use of the replica model 31, where 32 is a support for the negative model 30, 33 is a support for the replica model 31, 34 is a model matching device, 35 is a support member, and 36 is a support member for the replication model 31. In the sub-assembly jig, 37 is a leveling block, 38 is a mass block, and 39 is a support for a model matching device.

Therefore, the number of man-hours required to create a duplicate model increases, leading to higher costs. Furthermore, since the duplicate model is an inverted copy of the master model, accuracy is impaired.

Therefore, the present invention was made to solve the above problems, and due to the manufacturing constraints mentioned above, the parallelism of the two surfaces and the surface accuracy of only one of the two surfaces are guaranteed. Even if aluminum honeycomb plates are used as the main material, they can be assembled and manufactured with high precision, and when used after completion,
The object of the present invention is to provide a structure for a master model of an automobile jig having a structure that can be separated into left and right parts and reproduced, and a method for manufacturing the same.

To this end, in the present invention, a gap is provided between one of the pair of structures made of aluminum honeycomb plates and the left and right fittings, and the gap is adjusted by adjusting the adjustment bolt, which is the adjustment means, between the pair of structures. After adjusting while measuring the parallelism and ensuring the parallelism and surface accuracy of the left and right structures, pour epoxy casting resin into the gap and harden it. The intended purpose is achieved by fixing it to either one.

The present invention will be described below with reference to illustrative embodiments. (See Fig. 21) A is a structure for a master model, which includes a pair of model parts 51 whose surfaces are made of resin and processed into the shape of a car body.
51', and structures b and b' made of aluminum honeycomb plates to which model part supports 52 and 52' provided on the back surfaces of the model parts 51 and 51' are fixed via mounting plates 53 and 53'. the structure b,
The left and right fittings 54 are disposed between b' and are made of cast aluminum and extend in the width direction of the vehicle body.

The structure b is cut into a predetermined shape and includes a front side aluminum plate 55 whose surface accuracy is guaranteed, a back side aluminum plate 56 which is cut into the same shape and whose surface accuracy is not guaranteed, and both aluminum plates 55. , 56, a peripheral aluminum plate 57 bonded to the peripheral edge thereof, a model mounting aluminum plate 58a bonded to a position corresponding to the mounting plate 53 of the front side aluminum plate 55, and the back side aluminum plate 56. It is composed of an aluminum plate 58b for attaching a joint fitting which is glued to the approximate center of the inside of the aluminum plate 58b, and a honeycomb-shaped aluminum honeycomb 59 which is interposed and glued in the space between the two aluminum parts 55 and 56.

Incidentally, the structure b' is also constructed in the same manner as the structure b, and the reference numeral 55' in the figure indicates an aluminum plate on the front side;
56' is the rear aluminum plate, 57' is the aluminum plate for the periphery, 58'a is the aluminum plate for mounting the model, 5
8'b is an aluminum plate for attaching a fitting, 59' is an aluminum honeycomb, and c is a model part of the roof part, a model part support body, and a structure.

Further, the manufacturing method for both the structures b and b' is the same as that for the structure a described above with reference to FIG. 6.

Further, although the steel bushing 61 for inserting the dowel pin is shown only on the structure b' side in the drawing, this steel bushing is also screwed onto the structure b side, and the dowel pin is inserted therein.

The left and right joint fittings 54 have the structures b,
Contact portions 54a and 54b are formed that contact b′,
A resin 62 is fixed to the surface of one of the contact portions 54a.

Note that the left and right joint fittings 54 are made in advance to have a negative dimension for the adhesion of the resin 62. Further, reference numeral 63 in the figure indicates the other contact portion 54b of the contact portions.
Steel bushings 64 and 64' screwed to the side (not shown, but also screwed to the one contacting part 54a side) are the master model side for the master model mount. Post, 65,65'
is the jig side post for master model mounting.

Next, a method for manufacturing a master model structure according to the present invention will be described. (See Figures 15 to 18) First, structure b is placed on a surface plate 66 equipped with a three-dimensional measuring machine with the front aluminum plate 55, which guarantees the surface accuracy of structure b, facing downward. place next,
A mold release agent (not shown) is applied to a predetermined position of the rear aluminum plate 56 where the surface precision of the structure b is not guaranteed, and the left and right joint fittings 54 are erected on the part, and a sealing tape (not shown) is applied. Temporarily tighten the bolt 67 wrapped around the
8, a gap of approximately 2 mm is provided between the back side aluminum plate 56 and one of the abutting portions 54a of the left and right fittings 54.

Next, the other contact portion 5 of the left and right joint fittings 54
4b, the structure b' is placed with the rear aluminum plate 56' whose surface accuracy is not guaranteed facing down, and is fixed by tightening with bolts 67', and further, Knock pins 60 are driven into steel bushes 61 and 63 to determine the longitudinal and vertical positions of the structure b'.

Note that the bolts may be tightened after the dowel pin 60 is driven in first.

After that, the head 6 of the three-dimensional measuring machine is attached to the front aluminum plate 55' where the surface accuracy of the structure b' is guaranteed.
Adjust the adjustment bolt 68 while making contact with the dial gauge 70 attached to the tip of the 9, and measure the accuracy in the vertical direction (horizontal direction when the structure is raised) between the structures b and b'. decide. After determining the accuracy in the vertical direction, one of the abutting portions 54a of the left and right fittings 54 is fixed to the structure using the bolts 67.

It goes without saying that at this time, a gap is provided by the adjustment bolt 68.

Next, a weir 71 is made of clay or the like around the entire circumference of the one abutting portion 54a, and a tube 72 made of vinyl chloride or the like is inserted into the weir 71.
Epoxy casting resin 62 is injected into the gap between the structure b and one of the abutting portions 54a of the left and right fittings 54 via the epoxy resin 62, and the resin 62 is adhered to the abutting portion 54a.

Note that since a mold release agent is applied to the structure b side, the resin 62 does not adhere to the structure b.

After the resin 62 has hardened, a dowel pin (not shown) is driven in to determine the longitudinal and vertical positions of the structure b. Finally, the weir 71 and the resin 62 are deburred to complete the master model structure as shown in FIG. 19.

Note that reference numeral 84 in FIG. 18 is a temporary support for supporting the structure.

Further, in the embodiment described above, the adjustment bolt 68 was used as an adjustment means between the structures b and b', but the invention is not limited to this, and a wedge or a support with a turnbuckle or the like may be used.

Further, in the embodiment described above, the resin 62 is bonded to the left and right joint fittings 54 side, but the resin 62 is not limited to this, and may be bonded to the structure b (or b') side. In this case, as a matter of course, it is necessary to apply the mold release agent to the left and right joint fittings 54 side. In addition, resin 62 is placed on the structure b (or b') side.
Since the resin 62 is a thin plate with a thickness of about 2 mm, even if the resin 62 undergoes thermal expansion, the parallelism between the left and right structures b and b' will not be significantly distorted. . Further, even if the resin 62 is used, since it is received by the surface, the resin 62 will not be deformed or damaged.

Further, in the above embodiment, after determining the accuracy (parallelism) of the structures b and b' in the left-right direction, the structure b is fixed with bolts, and the resin 62 is adhesively cured.
Although the structure b is positioned by inserting a dowel pin in the longitudinal direction and the vertical direction, the present invention is not limited to this. Before bonding the resin 62,
Alternatively, the resin 62 may be bonded after the structure b is positioned in the longitudinal direction and the vertical direction by driving a dowel pin before tightening the bolts.

The master model structure configured as described above includes the model parts 51, 51' and the model post 6.
Attach 4, 64', etc. to complete the master model. (See FIGS. 20 and 21) Reference numeral 73 shown in FIG. 20 is a locate button.

FIG. 22 shows an example of use of the master model according to the present invention in the workpiece receiving surface model matching process in the main process of an automobile body assembly jig, in which B is the main assembly jig and 74 is the main assembly jig. 75 is a jig post with a locating pin, 76 is a body side locating pin, and 77 is a lift and carry.

In the master model, the resin 62 provided to achieve parallelism and surface accuracy of the left and right structures b and b' is glued to the left and right joint fittings 54 side or the structure b (or b') side. , it does not come apart like the shims described above (description of FIGS. 7 to 10). Therefore, it is possible to disassemble and reproduce the left and right structures b and b′, so the disassembled model can be used to match the workpiece receiving surface model in the sub-process of the automobile body assembly jig. .

FIG. 24 shows an example of its use, where C is a model matching device, 78 is a sub-assembly jig,
78a is a receiving surface, 79 is a jig post, 80 is a jig locating pin, 81 is a leveling block, 82
83 is a mass block, and 83 is a jig supporter.

As described above, according to the present invention, an aluminum honeycomb plate can be used as a structure, so the weight of the structure can be reduced, and when assembling and manufacturing, a structure for an automobile jig master model can be used. The required accuracy can be easily and stably obtained.

Furthermore, according to the present invention, it is possible to disassemble and reproduce the master model, so if the master model is used in an assembled state, it can be used for matching the workpiece receiving surface model in the main process of the vehicle body assembly jig. Moreover, if the master model is disassembled into left and right parts as necessary, it can be used for matching the workpiece receiving surface model in the sub-process of the vehicle body assembly jig. Therefore, there is no need to create a model for the sub-process by separately inverting and duplicating the master model, so a single car jig master model can be used to
Since we can consistently process the model matching of car body assembly jigs for an entire car model, we can not only improve the accuracy of the model matching jigs, but also
Since there is no need to create a duplicate model, this method has effects such as lower costs.

[Brief explanation of drawings]

Figure 1 is a perspective view of a master model using a conventional aluminum casting structure, Figure 2 is a partially exploded perspective view of the same model, and Figure 3 is an exploded view of the master model used in the sub-process of the same model. Fig. 4 is a partially enlarged perspective view showing the aluminum casting structure, Fig. 5 is a partially enlarged cross-sectional view showing the state of the aluminum casting structure connected to the left and right joints, and Fig. 6 is a perspective view of the model. The figure is an exploded perspective view showing the constituent members of a structure using aluminum honeycomb plates, Figures 7 to 9 are perspective views showing a method for manufacturing a master model using shims,
Figure 0 is an enlarged sectional view of Figure 9, Figure 11 is a perspective view showing how the master model using shims is used for model matching in the main process of the vehicle body assembly jig, and Figures 12 and 13 are reproductions. FIG. 14 is a perspective view showing the model manufacturing method; FIG. 14 is a front view showing the use of model matching in the sub-process of the vehicle body assembly jig using a duplicate model; FIGS. 15 to 17, 19, and 20 are A perspective view showing the method of manufacturing a master model according to the present invention, FIG. 18 is similar to FIG.
21 is an enlarged sectional view of FIG. 20, FIG. 22 is a perspective view showing how the vehicle body assembly jig is used for model matching in the main process using the master model of the present invention, and FIG. 23 is a sub-enlarged sectional view of FIG. FIG. 24 is a perspective view of the disassembled model used in the process, and is a front view showing how the disassembled model is used for model matching in the sub-process of the vehicle body assembly jig. A is a master model structure, 51 and 51' are model parts, 52 and 52' are model part supports, b,
b' is the structure, 54 is the left and right joint fittings, 55, 55'
is the front side aluminum plate, 56, 56' is the back side aluminum plate, 57, 57' is the peripheral aluminum plate,
58a and 58'a are aluminum plates for mounting the model, 58
b, 58'b is an aluminum plate for mounting fittings, 59,
59' is aluminum honeycomb, 62 is resin, 67,6
7' is a bolt, 68 is an adjustment bolt, and 71 is a weir.

Claims (1)

[Scope of Claims] 1. A model part whose surface is made of resin and processed into the shape of a car body, a model part support provided on the back surface of the model part, and a structure to which the model part support is fixed are arranged on the left and right sides. are arranged to face each other, and left and right fittings are provided between both structures extending in the width direction of the vehicle body, and the structure is constituted by an aluminum honeycomb plate,
Further, a resin fixed to either the left or right joint or the structure is interposed between at least one of the structures and the ends of the left and right joints, and the structure and the left and right joints are separated. An automobile jig master model, characterized in that it is provided with a positioning knob pin that can be fixed with bolts and that can enter and exit a steel positioning bush provided on the structure and the left and right joint fittings. structure for. 2 Place one aluminum honeycomb plate on a surface plate with the side with guaranteed surface accuracy facing down, apply a mold release agent on the aluminum honeycomb plate or on the ends of the left and right joints, and then remove the aluminum honeycomb plate. Temporarily tighten the left and right fittings on the plate with fixing bolts,
After placing the other aluminum honeycomb plate on the left and right joint fittings and adjusting the gap between the left and right joint fittings and the aluminum honeycomb plate located on the lower side using an adjusting means to make the parallelism of both aluminum honeycomb plates, A method for manufacturing a structure for an automobile jig master model, characterized in that a weir is provided around left and right joint fittings, and a resin is injected into the gap and cured. 3. A model part whose surface is made of resin and processed into the shape of a car body, a model part support provided on the back surface of the model part, and a structure to which the model part support is fixed are arranged to face each other from side to side. A left and right joint fitting is provided between both structures extending in the width direction of the vehicle body, and the structure is constituted by an aluminum honeycomb plate,
Further, a resin fixed to either the left or right joint or the structure is interposed between at least one of the structures and the ends of the left and right joints, and the structure and the left and right joints are separated. The aluminum honeycomb plate is provided with a positioning knob pin that can be fixed with a bolt and that can be moved in and out of a steel positioning bush provided on the structure and the left and right joint fittings, and the aluminum honeycomb plate has a A back side aluminum plate and a front side aluminum plate are formed which are cut into a predetermined shape, an aluminum honeycomb is bonded between both aluminum plates, and both aluminum plates are connected to the outer peripheral ends of the both aluminum plates. A peripheral aluminum plate that surrounds the aluminum honeycomb to form an outer periphery is bonded to the surface-side aluminum plate at a position where the mounting plate is attached to which the model support supporting the model part is attached. A structure for an automobile jig master model, characterized in that an aluminum plate for mounting a model is adhered to the aluminum plate, and an aluminum plate for attaching a joint fitting is adhered to the rear aluminum plate at a position where the left and right joint fittings are to be attached. .