JPS634583Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an automatic tool changer in a vertical machining center, which allows direct tool change on the spindle without a tool change arm, and is completely free of contamination from chips etc. during operation. It was developed with the aim of obtaining a highly reliable and simplified device that can be easily replaced without interfering with the workpiece.

An automated machine tool that is equipped with an automatic tool changer and a numerical control device for machining is called a machining center, and the automatic tool changer in particular has been the main part of which has been devised in various ways.

Conventional automatic tool changers are generally installed outside the main body of a machine tool, located on the side of the main body near the main spindle or diagonally rearward. Therefore, at the tool changing position, the width of the tool changing device overlaps with the work table and mutually interferes with the work, requiring a correspondingly large travel distance of the tool changing device, which limits the range of use of the work. There were some shortcomings. Furthermore, since the tool changer is exposed near the spindle, there is also the drawback that the tool is contaminated with chips, cutting oil, dust, etc. during operation.

Attempts to form a tunnel-like recess in the center of a column, which occupies a large space among the components of a machining center, and to house a tool magazine in the center, were made around the same time as the invention of the present invention.
As seen in No. 96749, this one has a structure in which the column itself moves back and forth with respect to the base, and the tool magazine also moves back and forth, and tools are exchanged by the cooperative action of these. The tool magazine cannot be completely housed inside the column during work, and even if the tool magazine is provided with a cover, it is impossible to completely prevent the tool magazine from being contaminated by chips and cutting oil in the work. It is something that cannot happen.

The present invention is an automatic tool changer that eliminates these conventional drawbacks, and its structural features include an opening 8 in the Y-axis direction relative to the main axis in the body of the column fixed upright on the base; A tool magazine body 10 having a large number of endless tool gripping claws that rotates in a horizontal plane is installed inside the opening so as to be movable back and forth in the Y-axis direction to a position directly below the main shaft supported by a column, and protrudes from the rear surface of the opening 8. A magazine sliding rail 12 is provided, and an opening/closing door 9 is provided in front of the column opening.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a front view of a vertical machining center equipped with this device, and FIG. 2 is a side view. FIG. 3 is a sectional view of the main part of this device.

As is clear from Figures 1 and 2, the automatic tool changer is a machining center that cannot be seen from the outside, and from the front you can see the spindle head 1 and the column 3 that supports the spindle 2, and the work table below. 4. Only the saddle 5, bed 6, and operation panel 7 are visible. Between the main spindle 2 and the work table 4, there is a Y
An axial opening 8 is provided at the position indicated by the dashed line in the figure, and an opening/closing door 9 is provided in front of the opening 8. As long as the opening/closing door 9 is closed, the main shaft 2 and work table 4 can be opened.
You can't see anything between them.

The tool magazine main body 10 is stored in the column body, except that the magazine cover 11 protrudes slightly on the right side, that is, on the back side, when viewed from the side view.
The tool magazine itself is completely retractable so that its existence cannot be recognized from the outside. As shown in FIG. 3, the tool magazine main body 10 has a structure such that the magazine slide rail 12 is installed inside the column body opening 8 and is movable back and forth in the Y-axis direction using an air cylinder 13. A large number of endless tool gripping claws 15 that rotate in a horizontal plane are arranged on a movable base 14, and a tool holder 16 is supported thereon with the tapered portion facing upward. The forward position of the tool magazine body is a position where the tool holder 16 at the tip correctly aligns with the axis of the main spindle 2 and stops, so tools can be directly attached and removed by lowering the main spindle. As is clear from FIGS. 2 and 3, this is a position located behind the main shaft 2 by a distance D and accommodated in an opening/closing door 9 provided on the front surface of the column. Therefore, when the opening/closing door 9 is closed, the magazine body is completely isolated from the main shaft 2, and there is no contamination of the magazine by chips or cutting oil.

Even when the tool magazine main body 10 moves forward and the tool is replaced, the tool magazine is only in the position of the spindle 2 as shown in Fig. 2, so the work table 4 is
Another unique feature of this device is that when it is moved back on the axis to the left in the figure, there is no interference between the tool magazine and the workpiece. Therefore, there is an advantage that a large working range can be obtained even if the device is made small.

To summarize the above effects, since the tool magazine body is housed in the column body and an armless automatic tool changer is created by direct exchange using the main shaft, the device can be made smaller and simpler, and the reliability of the device is improved. , it has become possible to secure a large work area, and the tool magazine is isolated and housed with an opening/closing door during work, so there is no contamination of the magazine.As a result, the machine is compact and low cost, which was not possible before. As a result, a vertical machining center with high performance and excellent design was created.

[Brief explanation of drawings]

FIG. 1 is a front view of a vertical machining center equipped with this device, and FIG. 2 is a side view of the same. FIG. 3 is a sectional view of the main part of this device. 2...Main shaft, 3...Column, 4...Work table, 8...Column opening, 9...Opening/closing door, 10
... Tool magazine body, 14 ... Magazine sliding base, 15 ... Tool gripping claw, 16 ... Tool holder.

Claims (1)

[Scope of utility model registration request] An opening 8 in the Y-axis direction with respect to the main axis is provided in the body of a column fixed upright on a base, and a tool magazine body 10 having a large number of endless tool gripping claws that rotate in a horizontal plane is placed inside the opening in the column. The vertical type is installed so as to be movable back and forth in the Y-axis direction to a position directly below the supported main shaft, is provided with a magazine sliding rail 12 projecting from the rear surface of the column opening 8, and is provided with an opening/closing door 9 on the front surface of the column opening. Automatic tool changer in machining center.