JPS60201844A - Bed reinforcing mechanism in electrical machining device - Google Patents

Abstract

PURPOSE:To restrain a column from tilting back and forth due to deformation of a bed which is caused by a shift of the center of gravity, to aim at enhancing the accuracy of electrical discharge machining, by arranging a reinforcing member made of a steel pipe directly below the attaching section of the column, or by extending a supply member to integrally incorporate it with the column. CONSTITUTION:A supply member 11 is attached and secured between the upper and lower surfaces of a bed 1 directly below the column attaching section 2a for a column 2 which is planted on the upper surface of the bed 1, having a diameter which is may be inscribed in the column attaching section 2a or which is sufficient to be supported on the top end part 11a of the column. Accordingly, the upper surface of the bed 1 in the vicinity of the column attaching section 2a has a high rigidity so that deformation may be restrained, and as well, since it has a unit structure of a circular cross-sectioned shape, the rigidity is uniform over the column attaching section 2a, and there are generated no deterioration in the accuracy of machining, which is caused by the column being tilted back and forth due to deformation of the upper surface of the bed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in the bed of an electric machining machine used for electrical discharge machining.

[Conventional technical field]

A conventional example of an electric processing machine is shown in FIG. That is, processing machine bed 1 (hereinafter simply referred to as bed)
A column 2 is erected on the bed 1, a saddle guide rail 6 is arranged on the bed 1, a saddle 4 is movably mounted thereon, a table guide rail 5 is arranged on the saddle 4, and the workpiece is 7 placed on a table 6 that can be fixed in a predetermined position, the saddle 4 and the table 6'f! ：Sounds like a moving platform. That is, the saddle is movable in the Y direction along the saddle guide rail 6, and the table 6 is movable in the X direction along the table guide rail 5.
Therefore, the workpiece 7 can occupy any position on the X-Y plane, and the processing bed 8 attached to the tip of the column 2 is configured so that it can freely move up and down in the Z direction. . Furthermore, the internal structure of the single-bed, box-shaped interior structure is such that reinforcing ribs 9 are arranged perpendicular to the direction in which the saddle guide rails 3 are laid, that is, in the Y direction, as shown in FIG. There is.

Since the electric discharge machining performed by this electric machining machine utilizes the electric discharge phenomenon between the workpiece 7 and the machining point 8, it is necessary to maintain an appropriate gap between the two. While maintaining the gap between the workpieces,
- It is finished into the desired shape by feeding it in the Y plane, but at that time, the center of gravity of each of the workpiece 7, table 6, and saddle 4 moves, so these are moved to the lower part. As mentioned above, reinforcing ribs 9 are arranged on the processing machine bed 1 supported by the machine bed 1 to provide reinforcement.

However, when the saddle 4 moves on the saddle guide rail 6, it rides over the reinforcing ribs 9, so a waving phenomenon occurs in which a load 10 is applied to the bed 1 and a deflection δ1 occurs as shown in FIG. As a result, the deformation of the bed 1 is transmitted to the processing machine/head 8 via the column 2, causing unexpected relative displacement between the bed and the workpiece, which impairs the accuracy of precision machining. There is a limit.

[Summary of the invention]

This invention was made in order to improve the current situation, and it is possible to arrange a reinforcing member made of steel pipe directly below the column attachment part, or to extend the reinforcing member upward and integrate it with the column. This provides a bed for an electric processing machine that eliminates the drawbacks of the prior art.

Next, embodiments of the invention will be described with reference to the drawings.

In FIG. 4, reference numeral 11 denotes a reinforcing member fixedly attached to the upper and lower surfaces of the bed 1 vertically below the column attachment part 2a of the column 2 (see FIG. 1) installed on the upper surface of the bed 1. The member is a commercially available structural steel pipe specified by JIS, and has a diameter that is inscribed in the column attachment portion 2a or a diameter that is sufficient to support the weight of the column on its upper end portion 11a.

Therefore, the machinability of the upper surface of the bed 1 in the vicinity of the column attachment part 2a is improved and deformation is suppressed, and since it is an integral structure with a circular cross section, its rigidity becomes uniform along the column attachment part 2a. Therefore, unlike the conventional structure, deterioration of machining accuracy caused by deformation of the top surface of the bed and tilting of the column back and forth does not occur.

Furthermore, since commercially available structural steel pipes are used, the cost required for the reinforcing member is low.

Next, another embodiment a1 of the present invention is shown in FIG.

In FIG. 5, a steel pipe reinforcing member 12 is disposed so as to penetrate upward through the upper surface of the bed 1, and also serves as a base member of the column. Further, a portion 12a where the reinforcing member 12 and the top surface of the bed are in contact with each other is joined by welding.

Therefore, according to this structure, since the reinforcing member 12 also serves as the base member of the column, the rigidity of the bed top surface near the portion 12a where the reinforcing member 12 and the top surface of the bed 1 are in contact becomes high and uniform, which is different from the conventional structure. As a result, the deterioration of machining accuracy caused by the column tilting back and forth due to deformation of the top surface of the bed is eliminated.

Furthermore, since a commercially available structural steel pipe is used, the cost for the reinforcing member 12 is low. Furthermore, when the column is cooled by ventilation from the inside, the steel pipe reinforcing member 12 can be used as a ventilation passage, and since its cross section is circular, there is very little resistance to passage, and it provides added value as a ventilation passage. .

〔Effect of the invention〕

As described above, the present invention has a structure in which a reinforcing member is disposed directly below the column attachment part, or a structure in which the reinforcing member is extended and integrated with the column member, thereby making it possible to connect the moving platform to the cover. It is possible to suppress the longitudinal inclination of the column induced by the bed deflection caused by the shift of the center of gravity due to the movement of the workpiece, and it also enables efficient ventilation cooling of the column, making it possible to perform high-precision electrical discharge machining. There is something very important about the utility value above.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a conventional electric processing machine, Fig. 2 is a perspective view of a reinforcement structure of a conventional electric processing machine bed, and Fig. 6 FIG. 4 is a perspective view showing an embodiment of the invention, and FIG. 5 is a perspective view showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Processing machine bed, 2... Column, 6... Saddle guide rail, 4... Saddle, 5... Table guide rail, 6... Table, 7... Workpiece, 8
... Processing head, 9 ... Reinforcement rib, 11 ... Steel pipe reinforcement member, 12 ... Extended steel pipe reinforcement member. Note that the same reference numerals in the figures indicate parts corresponding to the same length. Agent Patent Attorney Sanro KimuraFigure 2Figure 3Figure 4Figure 5

Claims (1)

[Claims] In an electric processing machine that performs electrical discharge machining by moving a movable table on the processing machine bed along a guide rail, a steel pipe reinforcing member is arranged vertically below the column attachment part, or the reinforcing member is extended upward. A bed reinforcing mechanism for an electric processing machine, characterized in that the reinforcing member is integrated with a column member, and the reinforcing member is joined to an upper surface of a processing machine bed.