JPS6236590Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jig for increasing the machining capacity of a double-column vertical lathe.

In recent years, in order to reduce weld lines as much as possible, cylindrical materials have come to be used in the production of pressure vessels for nuclear power generation or coal liquefaction, for example.

Usually, a portal vertical lathe as shown in FIG. 1 is used to manufacture and process cylindrical materials.

This portal vertical lathe consists of a bed 1, a table 2, and a column 3.

By the way, the pressure vessels are becoming larger, and accordingly, the shape and weight of the cylindrical material are becoming larger and larger.

In order to manufacture and process such large cylindrical materials, an ultra-large vertical lathe is required, and a large amount of investment is required to newly introduce an ultra-large vertical lathe.

If a large cylindrical material could be machined using an existing vertical lathe, there would be no need to invest in a new purchase. If it is placed on the table 2 or the bed 1, the table 2 or the bed 1 will be damaged.

Generally, the maximum allowable load of a vertical lathe is directly above the metal 4 between the bed 1 and the table 2, as shown in Fig. The live load becomes smaller.

Therefore, the permissible load conditions of a vertical lathe for a large cylindrical workpiece with a large diameter and heavy weight are extremely poor.

In view of the above, the present invention has been developed to process large cylindrical workpieces without damaging the table or bed even if the large cylindrical workpiece is placed on an existing double-column vertical lathe. A jig has been developed that allows this to be carried out, and an example thereof will be described below based on FIGS. 3 and 4.

In FIGS. 3 and 4, reference numeral 5 indicates an annular shape that is installed on the table 2 corresponding to a position directly above the metal 4 between the bed 1 and the table 2 of the portal vertical lathe, and is fixed to the table 2 with bolts. On this annular seat 5, a cross-shaped receiving frame base 6 that is orthogonal to the annular seat 5 is integrally provided.

A receiving plate 7 is provided between each of the four ends of the parallel cross-shaped receiving frame 6, and an adjusting groove 7a along the longitudinal direction of the receiving frame 6 is provided on the surface of each receiving plate 7. It is being

On each of the receiving plates 7, there are a claw stand 8 and a hydraulic jack 9.
is provided so as to be slidable for fine adjustment along the adjusting groove 7a.

The claw stand 8 is for fixing the cylindrical workpiece W by coming into contact with the inner peripheral surface of the cylindrical workpiece W placed between the four ends of the cross-shaped receiving frame base 6. It is.

In addition, when placing the cylindrical workpiece W between the four ends of the cross-shaped receiving frame 6, the hydraulic jack 9 holds the cylindrical workpiece W suspended by an overhead crane or the like. , the hydraulic jack 9 is temporarily stopped directly above the ends of the receiving frame 6, and the hydraulic jack 9 is moved upward to receive the cylindrical material W to be processed from an overhead crane, etc., and then the hydraulic jack 9 is gradually moved downward to receive the cylindrical material W to be processed. The material W is transferred from the hydraulic jack 9 to the end portions of the receiving frame 6 with less impact.

As mentioned above, the present invention includes an annular seat that is installed and fixed on the table corresponding to the position directly above the metal between the bed and table of a portal vertical lathe, and an annular seat that is centered on the annular seat and that is orthogonal to the annular seat. Since the machining jig for a double-gate vertical lathe is constructed from a cross-shaped vertical lathe processing jig, which is integrally provided with a double cross-shaped receiving frame for placing and fixing the cylindrical material to be machined between the four ends, the double cross-shaped receiving frame A large cylindrical material with a large diameter can be placed between each end of the four sides, and
The load can be distributed to each of the four ends of the cross-shaped support frame, and applied via the annular seat directly above the metal, where the maximum allowable load of the vertical lathe is. Since the oversized cylindrical material to be machined can be machined using the existing vertical lathe, the machining capacity of the existing vertical lathe can be greatly increased with reduced equipment costs.

Moreover, since the jig according to the present invention has a simple structure of an annular seat and a cross-shaped receiving frame base, it is possible to manufacture a lightweight jig with the required rigidity.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of a portal vertical lathe;
Fig. 2 is an explanatory diagram showing an example of the allowable load position in a double-column vertical lathe, Fig. 3 is a perspective view showing an embodiment of the processing jig of the present invention, and Fig. 4 is A-A in Fig. 3.
It is an arrow sectional view. 1... Bed of double-gate vertical lathe, 2... Table of double-gate vertical lathe, 3... Column of double-gate vertical lathe, 4...
Metal between bed and table, 5...Round seat, 6
. . . Receiving frame base in the shape of a square cross, 7 . . . Receiving plate, 7 a . . . Adjustment groove, 8 .

Claims (1)

[Scope of utility model registration request] an annular seat installed and fixed on the table corresponding to a position directly above the metal between the bed and table of the portal vertical lathe, and an annular seat provided integrally on the annular seat so as to be centered and orthogonal to the annular seat, A machining jig for a double-column vertical lathe, consisting of a cross-shaped support frame on which a cylindrical workpiece is placed and fixed between the four ends.