JPH0755420B2 - Table mounting structure for vertical machine tools - Google Patents

Description

TECHNICAL FIELD The present invention relates to a machine tool, and more particularly to a table mounting structure in a vertical numerical control machining center.

BACKGROUND OF THE INVENTION Generally, in a numerically controlled machine tool, all operating conditions are determined by a programmer, and the machine follows a command.
It works properly and automatically processes the workpiece.

By the way, in order for this type of machining center to operate unmanned and correctly for a long period of time without any command, the machine body must have a highly reliable characteristic regarding its function during automatic operation.

In terms of high reliability, the handling of the work chips and chip liquids that occur when the machine tool is operated continuously for a long time is a major problem.

In particular, the machining center has a problem that chips are accumulated on the table surface for fixing the workpiece due to its structure, unlike the numerically controlled lathe which can easily process chips, and the problem has not been solved by the conventional technology. is there.

[Object of the Invention] In view of the problems described above, a main object of the present invention is to provide a table mounting structure that ensures high reliability in a vertical machining center.

In order to achieve the object of the present invention, in the present invention, all the guide surfaces in the machine tool are provided above the portion where chips are generated to avoid obstacles due to scattering of chips and facilitate their removal. It is an object of the present invention to provide a table mounting structure in a vertical machine tool that can be used.

[Configuration of the Invention] The present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, the bed 12 of the machine tool 10 according to the first embodiment of the present invention has an empty space U in the center by a pair of side walls 14 which stand upright from the bottom at a predetermined distance in the left-right direction. It is configured in a letter shape. The top of each upright sidewall 14 is configured with a cross rail guide surface 16. A cross rail 20 is mounted on the guide surface 16 so that the guide rail 16 can be moved about the Y axis by a suitable driving device such as a servo motor. The cross rail 20 is formed with a saddle guide surface 24 that allows the saddle 22 to move about the X axis. It is attached to this saddle 22 and in the vertical direction (Z
A spindle head 26 is movably mounted on a shaft, and a spindle 28 capable of supporting and rotating a tool T is incorporated in the spindle head 26.

According to the present invention, in front of the bed 12, the table base 30 is horizontally installed so as to bridge the upright side walls 14 on both sides. A table 32 on which the workpiece W can be fixed is arranged on the mounting table 30.

The bottom of the bed 12 is provided with a discharge port 40 of a funnel shape or other suitable shape so as to facilitate the dropping and outflow of the chips and the cutting liquid in which the workpiece W is processed by the tool T, and a suitable discharging means, for example, It is sent out through a chip transport tunnel 42 provided with a conveyor belt (not shown).

FIG. 2 shows a vertical machine tool 110 according to the second embodiment of the present invention.
Indicates.

In this embodiment, the table mount 130 to which the rotary table 32 is attached has a crank shape, and the shafts at both ends are rotatably supported on both the upright side walls 14.

Since the other configurations in the second embodiment are the same as those described in the first embodiment, the details thereof will be omitted.

In the second embodiment, by rotating the rotary table 32 and the table mount 130, each side surface of the workpiece W except the surface attached to the table 32 can be cut with the tool T. That is, the present invention provides a so-called complete 5-axis control automatic machining device.

[Operation and Effect of the Invention] Since the table mounting structure in the vertical machine tool of the present invention is configured as described above, the upper surface of the upright side wall 14 of the bed 12 in both the first and second embodiments. The guide surface 16 of the cross rail 20 in the Y-axis direction is formed in the. This guide surface 16, together with the other guide surface, for example the saddle guide surface 24, is at a level considerably above the contact surface between the workpiece and the tool T, that is, the chip generation site. Therefore, the guide surface 16 of the cross rail 20 and the guide surface 24 on which all of the spindle heads, saddles, etc. move linearly during the work of cutting the workpiece are not contaminated by chips or the like and are not hindered.

Further, according to the present invention, since the work fixed to the table 32 mounted in the middle of the upright side wall 14 of the bed 12 is cut by the tool T, the chips generated at this portion are It falls without being restrained by the lower outlet 40,
It can be easily carried out of the machine through the chip transport tunnel 42.

[Brief description of drawings]

FIG. 1 is an elevational sectional view showing a table mounting structure in a vertical machine tool according to a first embodiment of the present invention, and FIG. 2 is an elevational view showing a second embodiment. The main reference numerals and letters in the attached drawings are listed below.
It is as follows. 10, 110 …… Vertical machine tool 12 …… Bed 14 …… Upright side wall 16 …… Cross rail guide surface 20 …… Cross rail 22 …… Saddle 24 …… Saddle guide surface 26 …… Spindle head 28 …… Spindle 30, 130 …… Table stand 32 …… Table 40 …… Chip discharge port 42 …… Chip transport tunnel T …… Tool W …… Workpiece

Claims (1)

[Claims] 1. A bed, a table for mounting a workpiece, and a cross rail for mounting a saddle on which a spindle head incorporating a spindle is movably mounted in a vertical direction. In a vertical machine tool having a pair of upright side walls spaced apart from each other, the table is located above the bottom of the bed, and a cross rail of the pair of side walls is provided. The table mount in a vertical machine tool is characterized in that the guide surface, the spindle head, the saddle, etc. are all installed horizontally between the pair of upright side walls at a position below the guide surface for linear movement. Rack structure.