JPH028620Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement of a workpiece receiving post that is used in a welding jig, a welding machine fixture, etc. to position and support a workpiece.

(Prior Art) As a conventionally known workpiece receiving post that positions and supports a workpiece in a predetermined position by means of a workpiece receiving portion that makes surface contact with the workpiece, there is one illustrated in FIG.

The workpiece receiving post shown in FIG. 6a includes a post main body part 1 made of a steel plate fixed to a jig base (not shown), and a workpiece receiving surface 2 as a workpiece receiving part formed directly on the upper end of the post body part 1. , and the workpiece receiving post shown in FIG. 6b has a post main body part 1 made of steel plate.
and a work receiving part 3 provided at the upper end thereof. Here, the work receiving portion 3 is composed of a synthetic resin layer, for example, an epoxy resin layer 4 containing iron powder, which is adhered to the post body portion 1, and a work receiving surface 5 provided on the epoxy resin layer 4.

Note that 6 in FIG. 6a shows a clamper that is rotated with respect to the work receiving surface 2 and clamps the work on that surface.

All of these conventional workpiece receiving posts function to properly position and support a workpiece of a specific shape at a predetermined position by fixing one or more of them to a jig base.

(Problem to be solved by the invention) However, in the conventional technique shown in FIG. However, since the receiving surface 2 had to be shaped by hand finishing until it had the required shape, there was the problem that forming the workpiece receiving surface 2 required a considerable number of man-hours. There was a problem in that the required accuracy could not be achieved on the workpiece receiving surface 2 unless it was done by a skilled worker.

In addition, in the conventional technique shown in FIG. 6b, for example, as shown in FIG. 7, the resin layer formation portion 7 existing above the post body 1 is It is divided by a resin partition plate 8 provided at the top and a workpiece contour surface 10 of the model 9 placed above the main body 1, and epoxy resin containing iron powder is injected into the resin layer forming space 7 and hardened. Although this method has the advantage that the workpiece receiving part 3, as well as the epoxy resin layer 4 and the workpiece receiving surface 5, can be formed relatively easily and with high precision, the epoxy resin layer 4 still has problems even if it contains iron powder. Since the wear resistance was low, there was a problem that the work receiving part 3 had poor durability.

The present invention has been made in view of these problems in the prior art, and it is an object of the present invention to provide a work receiving post with excellent durability while taking advantage of the latter advantages of the prior art.

(Means for Solving the Problems) The workpiece receiving post of the present invention has a synthetic resin layer containing iron powder adhered to the upper end portion of the post body, and the surface side of this synthetic resin layer is The workpiece receiving portion is constructed by bonding ceramic tiles that form the workpiece receiving surface to the workpiece receiving surface.

(Function) Ceramic tiles can be bonded to the surface of this workpiece receiving post, especially the workpiece receiving part, in conjunction with the formation of the synthetic resin layer, so this will facilitate the formation of the workpiece receiving part and ultimately the workpiece receiving surface. This makes it easier and ensures that sufficient accuracy of the workpiece receiving surface is always achieved, and on the other hand, the ceramic tiles that form the workpiece receiving surface effectively improve the abrasion resistance of that surface. .

(Example) This invention will be explained below based on illustrated examples.

FIG. 1 is an enlarged perspective view of the main parts of an embodiment of this invention. In the figure, 21 is a post body fixed to a jig base (not shown), and 22 is an upper end portion of the post body 21. The work receiving part provided at 23
2 shows clamper fasteners with the tip portion omitted.

Here, the work receiving section 22 is connected to the post body section 21.
It consists of a synthetic resin layer 24 that is adhered to the substrate, and a ceramic tile 26 that is bonded to the synthetic resin layer 24 to form a workpiece receiving surface 25. Here, the synthetic resin layer 24 can be formed of a reaction-curable synthetic resin such as the iron powder-containing epoxy resin described in the prior art. Furthermore, the bonding between the synthetic resin layer 24 and the ceramic tile 26 allows the surface of the ceramic tile 26 to form the workpiece receiving surface 25 of the desired shape, and the resin layer 24 and the ceramic tile 26 have sufficient strength. However, in this example, only the surface necessary to form the workpiece receiving surface 25 of the ceramic tile 26 is left and is made of synthetic resin. Embedded bonding within the layer ensures improved bonding strength and ease of bonding work. Furthermore, each tile piece 27 of the ceramic tile 26 in this example
As shown in Fig. 2, both the planar shape and the side surface shape are rectangular, but these shapes, especially the planar shape, can also be polygonal shapes such as triangles and pentagons, or circular and elliptical shapes. . Further, the dimensions of the tile piece 27 can be varied as long as it can form the required workpiece receiving surface 25 with the desired accuracy. In addition, 28 in FIG. 2 indicates a base sheet on which a plurality of tile pieces 27 are aligned and adhered, and this base sheet 28 is different from the surface to which the tile pieces 27 are adhered when constructing the workpiece receiving section 22. By gluing the opposite surface to the workpiece contour surface of the model,
It acts to facilitate the work of regularly arranging the tile pieces 27 on the contoured surface of the workpiece having irregularities. Furthermore, each tile piece 27 in the figure has a curved chamfered portion at a corner adjacent to the adhesive surface of the tile piece 27 to the base sheet 28, and this chamfered portion It acts to make the work receiving surface 25 formed at 26 a smooth uneven surface.

The formation of such a workpiece receiving post, particularly the workpiece receiving part 22, is carried out by supporting a model 30 on a flat surface 29 by a model receiving post 31, as shown in FIG.
0, the post main body 21 is placed at a position corresponding to the work contour surface 30a to which the ceramic tile 26 is adhered in advance either directly or indirectly via the base sheet 28, and then the upper end surface of the post main body 21 and the work This is also done by injecting, for example, an epoxy resin containing iron powder into the resin layer forming margin 32 formed between the contoured surface 30a and the resin layer forming section 32 in the same manner as described in connection with FIG. 7, and then hardening the resin.

FIG. 4 is an enlarged sectional view showing the state after the injected resin has hardened, and in this state, each tile piece 27
is embedded in and bonded to the synthetic resin layer 24, leaving only the adhesive surface to the base sheet 28, and the bonding force is applied between each tile piece 27 and the base sheet 28, and between the base sheet 28 and the contour surface of the workpiece. 30a, so when the model 30 is subsequently removed, the ceramic tile 26 remains on the synthetic resin layer 24 side,
The base sheet 28 will remain on the ceramic tile 26 side or the model 30 side. For this reason, the base sheet 28 is
If it remains on the side, simply peel it off, or if it does not remain, simply remove the model 30 to remove the workpiece contour surface 30a of the model 30.
This results in a workpiece receiving surface 25 that corresponds exactly to this. Note that when each tile piece 27 is directly adhered or adhered to the workpiece contour surface 30a of the model 30, the workpiece receiving surface 25 of the base sheet 28
Alternatively, it goes without saying that there is no need to remove the model 30 from the model 30 at all.

The work receiving post configured in this way is
By fixing it to one or more jig bases having workpiece receiving surfaces 25 of the desired shape,
During welding work and other operations, it is possible to accurately position and support a workpiece of a predetermined shape, and the workpiece receiving portion 22, especially the workpiece receiving surface 25, has sufficient wear resistance due to the ceramic tiles 26. , the durability of the workpiece receiving portion 22 is advantageously improved.

FIG. 5 is a perspective view showing an example of application of the workpiece receiving post configured as described above. By providing the part 22 to configure a workpiece receiving post and fixing this workpiece receiving post to the jig base 33,
It functions as a work support member for indirect spot welding. That is, the workpiece receiving post here holds a workpiece 36 consisting of a hemmed outer panel 34 and an inner panel 35 sandwiched between the hemmed portions of the outer panel 34, and brings the outer panel main body portion into contact with the workpiece receiving surface 25. It is securely supported in a predetermined position in this state. On the other hand, this workpiece receiving post supports the workpiece 36 supported thereon.
In the laminated portion of each panel 34, 35, an electrode 37 is provided at a position facing from the pressurizing chip 37a through the workpiece, and is wired to a secondary cable 40 and contacts the workpiece 36 with a cylinder 39. When indirect spot welding is performed using the detached electrode 38, by using the ceramic tile 26 as the back-up member, the heat-resistant insulation properties are improved, and no thermal distortion occurs on the outer surface of the workpiece.

(Effects of the invention) Therefore, according to this invention, the work receiving part is made up of a synthetic resin layer bonded to the post body and a ceramic tile bonded to this synthetic resin layer to form the work receiving surface. By doing so, it becomes extremely easy to form the workpiece receiving portion with high precision, and the durability of the workpiece receiving portion is significantly improved under the action of the ceramic tiles forming the workpiece receiving surface. In addition, by utilizing the heat-resistant insulation properties of ceramic tiles, excellent indirect spot welding can be performed without causing thermal distortion on the outer surface of the workpiece.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of this invention, Figures 2a and b are a plan view and side view illustrating a ceramic tile, respectively, Figure 3 is a side view showing the process of forming a workpiece receiving part, FIG. 4 is a cross-sectional view showing the state after the work receiving part is formed, FIG. 5 is a perspective view showing an example of application of this invention, and FIGS. 6 a and 6 are a perspective view and partially enlarged side view showing a conventional example, respectively. Figure 7a,
6b is a cross-sectional view showing the process of forming the workpiece receiving portion of FIG. 6b. 21... Post body part, 22... Work receiving part,
24...Synthetic resin layer, 25...Work receiving surface, 26
...Ceramic tile, 27...Tile piece.

Claims (1)

[Claims for Utility Model Registration] A post body portion 21 fixed to a jig base,
In this workpiece receiving post, which includes a workpiece receiving section 22 provided on the post body section 21, the workpiece receiving section 22 is attached to a synthetic resin layer 24, which is adhered to the post main body section 21, and this synthetic resin layer 24.
and a ceramic tile 26 which is joined to the ceramic tile 26 to form a work receiving surface.