JP3495791B2 - Machine tool table - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table for a machine tool, and more particularly, to the improvement of the operating rate of a machine tool by facilitating cleaning of chips clogged in a T-slot. And a machine tool table contributing to the following. 2. Description of the Related Art In a table for a machine tool, a T-groove is formed on a work fixing surface, and the work is fixed and fastened using the T-groove. In this type of T-groove, a cross-sectional dimension of a portion necessary for fixing the work follows a standard defined in standards such as ISO and JIS. In a machine tool table, chips fall on the table during processing, and the chips tend to accumulate in the T-grooves of the table. Therefore, it is necessary to sweep out and clean the chips so that the T-slot is not clogged with the chips. Conventionally, this cleaning is performed exclusively by hand, and a chip or the like slightly smaller than the cross-sectional dimension of the T-groove is used to scrape and remove chips. [0003] However, when chips are scraped out by hand, in the T-groove having a uniform cross section, the chips are gradually compressed while being pushed toward the outlet side. There is a problem that the swarf makes it difficult for the rod to slide along the T groove. For this reason, there is a problem that time is required for cleaning and the idle time of the machine tool associated with the cleaning becomes longer. The reduction in the efficiency of the cleaning operation due to the clogging of chips is a problem particularly in the case of a machine tool having a long table having a long T-slot. SUMMARY OF THE INVENTION It is an object of the present invention to provide a machine tool table which solves the above-mentioned problems of the prior art and can easily clean chips from a T-groove in a short time. [0005] In order to achieve the above object, the present invention provides a method for fixing and clamping a workpiece.
In the machine tool table having grooves formed on the upper surface, having a slope on the side surface of the T-shaped groove as the cross-sectional area of the T groove increases towards the table edge in proportion to the longitudinal dimension of the groove It is characterized by the following. When the operation of the machine tool is continued, the chips falling on the table gradually become clogged in the T-slots, so that it becomes necessary to scrape the chips using a stick or the like. According to the present invention, T-slot of the table, since the graded on its side surface, the amount of chips extruded in bars is increased toward the table edge, which together also gradually sectional weirs T groove Since the number of chips increases, clogging of the chips can be prevented, and the discharge of the chips can be facilitated. An embodiment of a table for a machine tool according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 denotes a table, which is configured as a rotary table capable of turning in a horizontal plane and continuously indexing. The table 10 is installed movably along a saddle 12 via a table base 11. On the upper surface of the table 10, a plurality of T-grooves 14 used for positioning and tightening the work are provided at equal intervals and in parallel. Reference numeral 13 denotes an edge locator, and the edge locator 13 is attached to orthogonal sides of the table 10 via bolts. FIG. 2 shows a cross-sectional shape of the T-shaped groove 14. The T-groove 14 is a groove having a T-shaped cross section, which is formed by a groove cut vertically from the upper surface of the table 10 and a groove parallel to the upper surface that is continuous with the groove. At the part where the T-slot bolt is inserted and the work is fixed and tightened, the dimension of the T-slot 14 is JIS
It is formed to have a constant cross-sectional shape according to a standard or the like. In other parts, the side surfaces 15, 1
5, among the inner surfaces such as the bottom surface 16, the side surfaces 15, 15 are sloped. This gradient, as shown in FIG.
The slope is inclined in such a direction as to increase the cross-sectional area of the T groove 14 in proportion to the longitudinal dimension of the T groove 14 toward one table end 17. [0009] In the table 10 as described above, when the machine is operated in the T-grooves 14, the table 1 is processed during machining.
Chips that have fallen to zero enter and gradually accumulate. Therefore, it is necessary to sweep out the chips clogged in the T-groove 14 periodically or according to the situation and clean it. In the T-groove 14 of the table 10 according to the embodiment, the side surfaces 15 and 15 of the T-groove 14 are sloped so that the cross-sectional area gradually increases toward the table end 17. When the rod is slid along the longitudinal direction of the T-groove 14 with the tip of the rod inserted in the T-groove 14, the cross-sectional area of the T-groove 14 itself gradually increases as the amount of chips extruded at the tip of the rod increases. To increase. Therefore, the chips can be easily scraped out without clogging, so that the time for cleaning the T-groove 14 can be reduced. It is to be noted that, of the inner surfaces forming the T-grooves 14, the bottom surface 16 may be provided with the same gradient as the side surface 15 or the side surfaces 15 and the bottom surface 16 may be provided with the same gradient. Since the same is true in terms of an increase in the cross-sectional area, it is possible to facilitate chip cleaning. As shown in FIG. 4, the inclination of the T-groove 14 is such that the cross-sectional shape of the T-groove 14 gradually increases toward the table ends 18 on both sides.
5, 15 can also be added. By providing a gradient so as to increase in both directions in this way, it is effective in the case of a large long table in which it becomes complicated to clean the chips clogged by the long T-slot. As is apparent from the above description, according to the present invention, the T-shaped groove is formed so that the sectional area of the T-shaped groove increases toward the table end in proportion to the longitudinal dimension of the groove. since the sloped on the side surface, the discharge of chips jammed in T groove table is facilitated, which contributes to the improvement of the operation rate by shortening the idle time of the machine tool with the cleaning table be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a table of a machine tool to which the present invention is applied. FIG. 2 is a cross-sectional view of the table. FIG. 3A is a plan view of a table showing a gradient attached to a side surface of a T groove, and FIG. 3B is an end view of the T groove of the table. FIG. 4 is a plan view showing a T-shaped groove inclined in both directions. [Description of Signs] 10 Table 11 Table Base 12 Saddle 13 Edge Locator 14 T-Slot 15 Side 16 Bottom

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-170685 (JP, A) JP-A-8-90383 (JP, A) Japanese Utility Model Showa 50-83673 (JP, U) (58) Field (Int. Cl. ⁷ , DB name) B23Q 11/00 B23Q 1/03

Claims (1)

(57) Claims 1. In a machine tool table having a T-shaped groove formed on an upper surface for use in fixing and tightening a workpiece,
Machine tool table the cross-sectional area of the groove and having a slope on the side surface of the T-shaped groove so as to increase toward the table edge in proportion to the longitudinal dimension of the groove.