JPS60123236A - Bed for electric working machine - Google Patents

Abstract

PURPOSE:To realize highly accurate discharge machining by planting a reinforcing member immediately below a saddle guide rail along the rail thereby reducing the flexure of bed due to transfer of the center of gravity of saddle. CONSTITUTION:A saddle is mounted movably on the upper face of saddle guide rail 3 of machine bed 1. A reinforcing member 12 reaching to the bottom face of bed 1 is planted vertically in single sheet structure from immediately below the guide rail 3. Consequently, the rigidity of bed 1 is improved considerably while since the reinforcing member 12 is provided in single sheet member, the rigidity of bed 1 along the guide rail 3 will be uniform and since the saddle will move on the reinforcing member 12 at any time, the absolute level of the flexure of bed 1 due to the weight of saddle, table and work is reduced and transfer of the center of gravity on the saddle guide rail 3 will scarcelly cause variation of flexure of bed 1.

Description

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

[Prior art] − A conventional example of an electric processing machine is shown in FIG.

That is, a column 2 having a machining bed 8 is set up on an electric processing machine bed 1, a saddle guide rail 3 is arranged on the bed, a saddle 4 is movably mounted, and a table guide is placed on the saddle. The rail 5 is arranged and the workpiece (
A table 6 is placed on which a workpiece 7 can be fixed, and the saddle is movable along the saddle guide rail 6 in the Y direction, and the table 6 is movable along the table guide rail 5 in the X direction. and therefore,
The workpiece 7 can occupy nine arbitrary positions on the X-Y plane, and the processing head 8 is constructed so that it can freely move up and down in two directions. Furthermore, the internal structure of the bed is
As shown in FIG. 2, the reinforcing ribs 11 are arranged orthogonal to the installation direction of the side guide rails 6, that is, the Y direction.

Therefore, the electric discharge machining performed by this electric machining machine utilizes the electric discharge phenomenon between the workpiece 7 and the machining head 8, and it is necessary to maintain an appropriate gap between the two. The workpiece is fed into a desired shape by feeding it in the X-Y plane while maintaining the gap, and at this time, each of the workpiece 7, the table 6, and the saddle 6 Since the center of gravity of the machine moves, the reinforcing ribs 11 are arranged on the processing machine bed 1, which supports the machines, to provide reinforcement. However, when the saddle 4 moves on the saddle guide rail 4, it gets over the reinforcing rib 11, so the bed IVC
As shown in FIG. 3, a waving phenomenon occurs in which a load 16 is applied and a deflection δ1 occurs, and as a result, the deformation of the bed is transmitted to the processing machine head 8 via the column 2, and between the head and the workpiece. cause an unexpected relative displacement in the
There are limits to the accuracy of precision machining.

[Summary of the invention]

The present invention was made in view of the current situation, and provides a bed for an electric processing machine that eliminates the drawbacks of the prior art by erecting a reinforcing member along the length of the saddle guide rail directly below the saddle guide rail. It is intended to.

[Embodiments of the invention]

Next, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 4, a machine bed 1 is provided with a saddle guide rail 6 on its upper surface on which a saddle 4 (not shown) is movably mounted, and reaches the bottom surface of the bed in a vertical manner directly below the guide rail. The reinforcing member 12 has a single plate structure and is erected.

Therefore, according to the present invention, since the reinforcing member 12 is vertically installed directly below the saddle guide rail 6,
The rigidity of the bed 1 is much improved compared to the conventional structure in which reinforcing ribs are arranged perpendicular to the guide rail, and the reinforcing member is constructed of a single plate structure. , the rigidity of the bed 1 along the guide rail is
The bed 1 is not constant and non-uniform as in the conventional structure, and therefore the saddle 4 is always placed and moved on the reinforcing member 12, so that the bed 1 is not affected by the weight of the saddle, the table, and the workpiece. 9, where the absolute value of the deflection is small,
Furthermore, even if the center of gravity moves on the saddle guide rail 6, there is no sudden change in rigidity unlike in the conventional structure, so there is almost no change in bed deflection. Looking at this in the analysis results shown in FIG. 5, the deflection δ2 due to the load 13 is reduced to approximately one-fifth of the deflection 6 of the conventional structure described above.

Next, to explain another embodiment of the present invention, as shown in FIG. 6, the reinforcing member 12 does not have a single plate structure as in the previous embodiment, but is divided in the vertical direction. The bed rigidity becomes substantially constant along the saddle guide rail 6, and the weight can be reduced.

Further, in FIG. 7 showing still another embodiment of this invention, the structure of the reinforcing member 12 is formed into a frame shape with vertical members 12c and horizontal members 12a in both vertical and horizontal directions, and diagonal members 12b are formed at the corners of the frame. It has a truss structure in which vertical and diagonal members 12a and 12b share the responsibility of improving the rigidity of the entire reinforcing member, and uniformity of rigidity along the guide rail 3 is achieved by the horizontal member 12C.

Furthermore, if still other embodiments of the present invention are explained with reference to FIGS. 8 and 9, both of them have a bed structure in which reinforcing members 12 having a truss structure similar to that of the previous embodiment are arranged. In FIG. 8, the vertical member 12a of the reinforcing member described above is removed, and in FIG. The diagonal member 12b is provided diagonally, and the effect is the same as that of the previous embodiment.

〔Effect of the invention〕

As described above, the present invention has a structure in which a reinforcing member is provided directly under the saddle guide rail 6, so that the saddle 4 can be
Because it is possible to achieve highly accurate electrical discharge machining by reducing bend deflection based on the movement of the center of gravity due to etc., its industrial value is extremely high.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a conventional electric processing machine, Fig. 2 is a perspective view of a reinforcing structure of a conventional electric processing machine bed, and Fig. 3 is a perspective view of the bed due to movement of the center of gravity due to movement of the workpiece. An analysis diagram showing deformation, FIG. 4 is a layout diagram of reinforcing members showing an embodiment of this invention, and FIG. 5 is an analysis diagram of the previous bed deformation.
6.7.8 and 9 are front phase diagrams of reinforcing members showing other embodiments of the present invention, respectively. 1. Processing machine bed, 2. Column, 6. Saddle guide rail, 4. Saddle, 5. Table guide rail, 6. Table, 7. Workpiece, 8. Processing head, 11. ...Reinforcement rib, 12..Reinforcement member, 12a..Vertical member, 12b..Horizontal member, 12c..Diagonal member, 12d.
・Central vertical member, 13...Load. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa 1st figure @ 2nd figure 3rd whistle 4th hut 5th figure 6th figure 7th figure +2b 12b I'! 8 Amendment to figure procedure (spontaneous) October 22, 1980 To the Commissioner of the Japan Patent Office Kaishu No. 1111, Indication of the case, Japanese Patent Application No. 172514/1982, Title of invention: Electric processing machine bed 3, Amendment To Representative Hitoshi Katayama, Department 4, Agent 5, the title of the amendment, ``Claims'' in the specification, ``Details of the invention, 6, Contents of the amendment (11) ``Claims'' in the specification. (2) Correct “Processing head 1: 8” in the second line of page 2 of the specification to “processing head 8.” (3) Correct “processing head 8” in line 5 of page 3 of the specification. 1 nil 3'' is amended to ``su 1 nil 4''. Above attached appended claims (amendment) !-fil The loaded object is moved along the guide rail and Wataru is placed on the Okadate electric processing machine, A bed for an electric processing machine, characterized in that a reinforcing member is erected directly below a guide rail on the bed. (2) The reinforcing member has a single plate structure from the guide rail part to the bottom of the bed. As stated in Section 1
Comiki processing machine bed. (3) A bed for an electric processing machine as set forth in claim 1, wherein the reinforcing member has a combination structure of reinforcing ribs extending from the guide rail portion to the bottom of the bed. ” JP-A-123236 (6) Written Amendment (Directive) f30 1 1-7 Showa Year/Month Mr. Commissioner of the Japan Patent Office 1, Indication of the case Patent Application No. 172514/1982 2, Name of the invention: Electrical processing Machine bed 3, Person making the amendment Representative Hitoshi Katayama Department 4, Agent 6, Subject of amendment October 22, 1980, Letter of submission of the written amendment of the procedures of Suzeyama 1
"Subject of correction" column. 7. Details of the amendments are as shown in the attached sheet. Procedural amendment (voluntary) (correction) October 22, 1980, Commissioner of the Japan Patent Office 1, Indication of case: Japanese Patent Application No. 172514/1982 2, Title of invention: Electric processing machine bed 3 Representative of the person making the amendment Name: Hitoshi Katayama (7375) Patent Attorney Masuo Oiwa 5, "Claims" and "Detailed Description of the Invention" of the specification subject to amendment
Each column.

Claims (1)

[Claims] (11) An electric machining machine that performs electrical discharge machining by moving a loaded object along a guide rail, characterized in that a reinforcing member is erected directly below the guide rail on the bed. (2) The bed of the electric processing machine according to claim 1, in which the reinforcing member has a single plate structure from the guide rail part to the bottom of the bed. (3) The reinforcing member extends from the guide rail part to the bottom of the bed. The bed of an electric processing machine according to claim 1, which is configured to have a combination structure of reinforcing lips extending to the bottom of the bed.