JPH07266184A - Automatic door of machine tool cover - Google Patents

Abstract

PURPOSE:To contrive the simplification of an automatic door in a loader arm entering roof window of a cover overspreading the outer boundary of a machine tool and the reduction in work change time. CONSTITUTION:A door 13 is connected to the upper end of a vertical cover 9 of a headstock being shiftable in the Z-axis direction, and with a Z-axis movement into a specified position of the headstock, this door 13 is shifted together, opening a roof window 8a. Accordingly, a loader arm 14 comes to be admittible in consequence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door for a ceiling window for exchanging works by a loader for an outer peripheral cover of a machine tool.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a machine tool, such as a lathe, for exchanging workpieces using a gate-type loader has a window 101a provided on the ceiling of a cover 101 for covering the outer periphery of the machine, and a door 102 for an air cylinder. It was opened and closed by 103.

[0003]

The automatic door for the ceiling window described in the prior art requires a guide for the door and an actuator such as an air cylinder, and moreover the door is opened and closed in accordance with the operation of the loader. Since an electric control mechanism is required, the number of parts is large, the structure is complicated, and the work replacement time is long. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is a ceiling window with a cover that has a simple structure, does not require maintenance, and does not extend the work replacement time. It aims to provide an automatic opening and closing door.

[0004]

In order to achieve the above object, the automatic door of the cover of the machine tool according to the present invention is Z
An automatic door for a ceiling window of a cover that covers the outer circumference of a machine tool having an axially movable headstock, wherein the door is connected to the headstock and the ceiling window is moved by Z-axis movement to a predetermined retracted position of the headstock. Is designed to open.

Further, the present invention is an automatic door for a ceiling window of a cover which covers the outer periphery of a lathe, wherein the door is connected to a saddle, and the ceiling window is opened by Z axis movement of the saddle to a predetermined retracted position. .

[0006]

According to the first aspect of the present invention, the ceiling window is closed during the cutting process by the door connected to the Z-axis movable headstock, and when the headstock is moved to the predetermined retracted position by the Z-axis after the cutting process, the door moves together. And open the ceiling window.

According to a second aspect of the present invention, the ceiling window is closed during the cutting process by the door connected to the saddle which is movable in the Z axis, and when the saddle is moved to the predetermined retracted position by the Z axis after the cutting process, the door is moved together with the ceiling. Open the window.

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment In the headstock moving type machine tool shown in FIGS. 1 to 3, the headstock 2 is moved by a Z-axis servomotor (not shown) on the Z-axis guide 1a provided on the left side of the bed 1 installed on the floor. A spindle 3 is rotatably mounted, a spindle 3 is rotatably supported by a spindle head 2, and a chuck 4 is concentrically fitted to the tip of the spindle 3.

A guide in the X-axis direction (not shown) is provided on the right side of the bed 1, and a tool spindle head 5 is mounted on the X-axis guide so as to be movable and positioned by an X-axis servomotor (not shown). A tool spindle 6 is rotatably supported on the tool spindle head 5, and a rotary tool T is detachably attached to the tool spindle 6 via a tool holder.

The machine tool constructed as described above is covered with an outer peripheral cover 8 having a front cover 7 which can be opened and closed, and a ceiling window 8a for exchanging workpieces is formed in the ceiling of the outer peripheral cover 8. A vertical cover 9 is attached to a front side surface of the headstock 2, and a chip receiving cover 11 is fixed to a lower end of the vertical cover 9 so as to overlap the Z-axis guide cover 12 and an upper end of the vertical cover 9. Further, the door 13 for the ceiling window 8a is fixed to the lower surface of the ceiling plate of the outer peripheral cover 8 with a slight gap.

On the other hand, a loader beam (not shown) is provided above the machine tool horizontally in the Z-axis direction, and a carrier (not shown) movably provided on the loader beam
The loader arm 14 is provided so as to be movable in the vertical (Y-axis) direction, and the work W is grasped by the loader gripper 15 at the tip of the loader arm 14 so as to be openable and closable.

Next, the operation of the first embodiment will be described. While the workpiece W gripped by the chuck 3 is being cut by the Z-axis movement of the headstock 2 and the X-axis movement of the tool spindle head 5, as shown in FIG. It is blocked by. When the machining is completed and the headstock 2 is moved to the Z-axis direction anti-tool head side and positioned at a predetermined retracted position, the door 13 is also moved and the ceiling window 8a is opened.

Next, as shown in FIG. 3, the loader arm 14 standing by at a predetermined position above the machine tool is lowered, and the gripping center of the opened loader gripper 15 becomes concentric with the main shaft 3 and the loader gripper 15 Z The tip of the work is inserted into the gripping claw by the movement toward the spindle in the axial direction.

Next, the loader gripper 15 is closed, the chuck 3 is opened, and the work W is gripped again. Then, the loader gripper 15 again moves slightly to the Z-axis direction main spindle side, and the work W separates from the chuck 3. The loader arm 14 rises and the carrier moves in the Z-axis to wait at a predetermined position above the next process machine (not shown).

Next, another loader arm 14 for gripping the material of the work W is positioned at a predetermined position above the machine tool, and the material of the work W is gripped by the chuck 3 by a work mounting operation similar to the above-mentioned work removing operation. , When the loader arm 14 rises and leaves the machine tool, the headstock 2 moves to Z
It moves to the axial tool spindle head side and is positioned at the cutting start position, the door 13 moves together, and the ceiling window 8a closes.

Second Embodiment In the lathe shown in FIGS. 4 and 5, a headstock (not shown) is fixed on the left side of the bed 21, and a chuck 23 is fixed to the tip of a spindle (not shown) rotatably supported by the headstock. .
A Z-axis direction guide 21a is provided on the right side of the bed 21, and a saddle 24 is movably mounted on the Z-axis guide 21a. The saddle 24 has a guide 24a in the X-axis direction on the upper surface, a tool rest 25 is movably mounted on the X-axis guide 24a, and a turret 26 is provided on the tool rest 25 so as to be pivotally indexable. A fixed tool TA or a rotary tool T is detachably attached to 26.

The lathe constructed in this way has an outer peripheral cover 2
8 and a ceiling window 28a for exchanging the work is formed in the ceiling of the outer peripheral cover 28. A bottom plate 31 of a cover 29 having a U-shaped cross section is fixed to the saddle 24, and the bottom plate 31 also serves as the uppermost plate of the telescopic cover 32 that covers the Z-axis guide 21a. Further, the upper plate of the cover 29 is formed on the door 33 for the ceiling window 28 a, and the door 33 has a slight gap with the ceiling of the outer peripheral cover 28.

The door 33 does not necessarily have to be integrated with the cover 29 having a U-shaped cross section, and the door 33 is fixed to the saddle 24 via a plurality of stays 34 as shown by phantom lines in the drawing. May be. Further, a gate-shaped loader is provided above the lathe, and this loader is the same as that of the first embodiment.

Next, the operation of the second embodiment will be described. Figure 4
While the work W gripped by the chuck 23 is being cut by the Z-axis and / or X-axis movement of the tool rest 25, the ceiling window 28 a is closed by the door 33, as shown in FIG. When the saddle 24 is moved to the Z-axis direction anti-spindle side and positioned at a predetermined retracted position after the cutting process is completed, as shown in FIG.
The door 33 moves together with the ceiling window 28a as shown in FIG.

Next, the loader arm 14 descends and the work is exchanged.
When the saddle 24 moves to the Z-axis direction main spindle side and is positioned at the cutting start position after being lifted and separated from the lathe, the door 33 moves together to close the ceiling window 28a, and the ceiling window 28 during cutting is performed. Keeps being blocked. Of course, the door of the lathe cover of the second embodiment can be applied to a machine tool provided with a tool spindle head instead of the turret 26 and the tool rest 25.

[0021]

Since the present invention is configured as described above, it has the following effects. According to a first aspect of the present invention, when a door is fixed to a headstock that can move in the Z-axis, and when the headstock moves to the predetermined retracted position after the cutting process is completed, the door moves together and the ceiling window of the outer peripheral cover opens. Since the arm can be entered, a simple structure that does not require a dedicated actuator, door guide, etc., does not require maintenance, and the work replacement time can be shortened.

According to the second aspect of the present invention, the door is fixed to the saddle which can move in the Z-axis, and when the saddle moves in the Z-axis to the predetermined retracted position, the door moves together and the ceiling window is opened. The same effect as that of claim 1 can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a machine tool with a cover having an automatic door according to a first embodiment of the present invention.

FIG. 2 is a front view showing a partial cross section of a machine tool with a cover having an automatic door according to a first embodiment, showing a state in which the door is closed during cutting.

FIG. 3 is a front view showing a partial cross section of a machine tool with a cover having an automatic door according to the first embodiment, and is a view showing that a door is opened and a workpiece is being replaced.

FIG. 4 is a front view showing a partial cross section of a lathe with a cover having an automatic door according to a second embodiment, showing a state in which the door is opened during cutting.

FIG. 5 is a front view showing a partial cross section of a lathe with a cover having an automatic door according to a second embodiment, and is a view showing that the door is open and the workpiece is being replaced.

FIG. 6 is a perspective view of a lathe with a cover having a conventional automatic door.

[Explanation of symbols]

1, 21 bed 2 spindle head 5 tool spindle head 8, 28 outer peripheral cover 8a, 28a ceiling window 13, 33 door 14 loader arm 15 loader gripper 24 saddle 25 turret 26 turret

Claims (2)

[Claims] 1. An automatic door of a ceiling window of a cover for covering the outer periphery of a machine tool having a Z-movable headstock, wherein the door is connected to the headstock and is moved to a predetermined retracted position of the headstock. An automatic door for the cover of a machine tool, characterized in that the ceiling window is opened by moving the Z axis. 2. An automatic door for a ceiling window of a cover that covers the outer periphery of a lathe, wherein the door is connected to a saddle, and the ceiling window is opened by Z-axis movement of the saddle to a predetermined retracted position. An automatic door for the characteristic machine tool cover.